ext/sctp/usrsctp/usrsctplib/netinet/sctp_pcb.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
   5  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
   6  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are met:
  10  *
  11  * a) Redistributions of source code must retain the above copyright notice,
  12  *    this list of conditions and the following disclaimer.
  13  *
  14  * b) Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the distribution.
  17  *
  18  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  19  *    contributors may be used to endorse or promote products derived
  20  *    from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  24  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  26  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  32  * THE POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 #if defined(__FreeBSD__) && !defined(__Userspace__)
  36 #include <sys/cdefs.h>
  37 __FBSDID("$FreeBSD: head/sys/netinet/sctp_pcb.c 363456 2020-07-23 19:43:49Z tuexen $");
  38 #endif
  39
  40 #include <netinet/sctp_os.h>
  41 #if defined(__FreeBSD__) && !defined(__Userspace__)
  42 #include <sys/proc.h>
  43 #endif
  44 #include <netinet/sctp_var.h>
  45 #include <netinet/sctp_sysctl.h>
  46 #include <netinet/sctp_pcb.h>
  47 #include <netinet/sctputil.h>
  48 #include <netinet/sctp.h>
  49 #include <netinet/sctp_header.h>
  50 #include <netinet/sctp_asconf.h>
  51 #include <netinet/sctp_output.h>
  52 #include <netinet/sctp_timer.h>
  53 #include <netinet/sctp_bsd_addr.h>
  54 #if defined(INET) || defined(INET6)
  55 #if !defined(_WIN32)
  56 #include <netinet/udp.h>
  57 #endif
  58 #endif
  59 #ifdef INET6
  60 #if defined(__Userspace__)
  61 #include "user_ip6_var.h"
  62 #else
  63 #include <netinet6/ip6_var.h>
  64 #endif
  65 #endif
  66 #if defined(__FreeBSD__) && !defined(__Userspace__)
  67 #include <sys/sched.h>
  68 #include <sys/smp.h>
  69 #include <sys/unistd.h>
  70 #endif
  71 #if defined(__Userspace__)
  72 #include <user_socketvar.h>
  73 #include <user_atomic.h>
  74 #if !defined(_WIN32)
  75 #include <netdb.h>
  76 #endif
  77 #endif
  78
  79 #if !defined(__FreeBSD__) || defined(__Userspace__)
  80 struct sctp_base_info system_base_info;
  81
  82 #endif
  83 /* FIX: we don't handle multiple link local scopes */
  84 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  85 #ifdef INET6
  86 int
  87 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  88 {
  89 #ifdef SCTP_EMBEDDED_V6_SCOPE
  90 #if defined(__APPLE__) && !defined(__Userspace__)
  91         struct in6_addr tmp_a, tmp_b;
  92
  93         tmp_a = a->sin6_addr;
  94 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
  95         if (in6_embedscope(&tmp_a, a, NULL, NULL) != 0) {
  96 #else
  97         if (in6_embedscope(&tmp_a, a, NULL, NULL, NULL) != 0) {
  98 #endif
  99                 return (0);
 100         }
 101         tmp_b = b->sin6_addr;
 102 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
 103         if (in6_embedscope(&tmp_b, b, NULL, NULL) != 0) {
 104 #else
 105         if (in6_embedscope(&tmp_b, b, NULL, NULL, NULL) != 0) {
 106 #endif
 107                 return (0);
 108         }
 109         return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b));
 110 #elif defined(SCTP_KAME)
 111         struct sockaddr_in6 tmp_a, tmp_b;
 112
 113         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
 114         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
 115                 return (0);
 116         }
 117         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
 118         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
 119                 return (0);
 120         }
 121         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
 122 #else
 123         struct in6_addr tmp_a, tmp_b;
 124
 125         tmp_a = a->sin6_addr;
 126         if (in6_embedscope(&tmp_a, a) != 0) {
 127                 return (0);
 128         }
 129         tmp_b = b->sin6_addr;
 130         if (in6_embedscope(&tmp_b, b) != 0) {
 131                 return (0);
 132         }
 133         return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b));
 134 #endif
 135 #else
 136         return (IN6_ARE_ADDR_EQUAL(&(a->sin6_addr), &(b->sin6_addr)));
 137 #endif /* SCTP_EMBEDDED_V6_SCOPE */
 138 }
 139 #endif
 140
 141 void
 142 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
 143 {
 144         /*
 145          * We really don't need to lock this, but I will just because it
 146          * does not hurt.
 147          */
 148         SCTP_INP_INFO_RLOCK();
 149         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
 150         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
 151         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
 152         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
 153         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
 154         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
 155         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
 156         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
 157         SCTP_INP_INFO_RUNLOCK();
 158 }
 159
 160 /*-
 161  * Addresses are added to VRF's (Virtual Router's). For BSD we
 162  * have only the default VRF 0. We maintain a hash list of
 163  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
 164  * these has a list of addresses. When we add a new address
 165  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 166  * not exist we create it and add it to the list of IFN's
 167  * within the VRF. Once we have the sctp_ifn, we add the
 168  * address to the list. So we look something like:
 169  *
 170  * hash-vrf-table
 171  *   vrf-> ifn-> ifn -> ifn
 172  *   vrf    |
 173  *    ...   +--ifa-> ifa -> ifa
 174  *   vrf
 175  *
 176  * We keep these separate lists since the SCTP subsystem will
 177  * point to these from its source address selection nets structure.
 178  * When an address is deleted it does not happen right away on
 179  * the SCTP side, it gets scheduled. What we do when a
 180  * delete happens is immediately remove the address from
 181  * the master list and decrement the refcount. As our
 182  * addip iterator works through and frees the src address
 183  * selection pointing to the sctp_ifa, eventually the refcount
 184  * will reach 0 and we will delete it. Note that it is assumed
 185  * that any locking on system level ifn/ifa is done at the
 186  * caller of these functions and these routines will only
 187  * lock the SCTP structures as they add or delete things.
 188  *
 189  * Other notes on VRF concepts.
 190  *  - An endpoint can be in multiple VRF's
 191  *  - An association lives within a VRF and only one VRF.
 192  *  - Any incoming packet we can deduce the VRF for by
 193  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 194  *  - Any downward send call or connect call must supply the
 195  *    VRF via ancillary data or via some sort of set default
 196  *    VRF socket option call (again for BSD no brainer since
 197  *    the VRF is always 0).
 198  *  - An endpoint may add multiple VRF's to it.
 199  *  - Listening sockets can accept associations in any
 200  *    of the VRF's they are in but the assoc will end up
 201  *    in only one VRF (gotten from the packet or connect/send).
 202  *
 203  */
 204
 205 struct sctp_vrf *
 206 sctp_allocate_vrf(int vrf_id)
 207 {
 208         struct sctp_vrf *vrf = NULL;
 209         struct sctp_vrflist *bucket;
 210
 211         /* First allocate the VRF structure */
 212         vrf = sctp_find_vrf(vrf_id);
 213         if (vrf) {
 214                 /* Already allocated */
 215                 return (vrf);
 216         }
 217         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 218                     SCTP_M_VRF);
 219         if (vrf == NULL) {
 220                 /* No memory */
 221 #ifdef INVARIANTS
 222                 panic("No memory for VRF:%d", vrf_id);
 223 #endif
 224                 return (NULL);
 225         }
 226         /* setup the VRF */
 227         memset(vrf, 0, sizeof(struct sctp_vrf));
 228         vrf->vrf_id = vrf_id;
 229         LIST_INIT(&vrf->ifnlist);
 230         vrf->total_ifa_count = 0;
 231         vrf->refcount = 0;
 232         /* now also setup table ids */
 233         SCTP_INIT_VRF_TABLEID(vrf);
 234         /* Init the HASH of addresses */
 235         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 236                                             &vrf->vrf_addr_hashmark);
 237         if (vrf->vrf_addr_hash == NULL) {
 238                 /* No memory */
 239 #ifdef INVARIANTS
 240                 panic("No memory for VRF:%d", vrf_id);
 241 #endif
 242                 SCTP_FREE(vrf, SCTP_M_VRF);
 243                 return (NULL);
 244         }
 245
 246         /* Add it to the hash table */
 247         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 248         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 249         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 250         return (vrf);
 251 }
 252
 253
 254 struct sctp_ifn *
 255 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 256 {
 257         struct sctp_ifn *sctp_ifnp;
 258         struct sctp_ifnlist *hash_ifn_head;
 259
 260         /* We assume the lock is held for the addresses
 261          * if that's wrong problems could occur :-)
 262          */
 263         SCTP_IPI_ADDR_LOCK_ASSERT();
 264         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 265         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 266                 if (sctp_ifnp->ifn_index == ifn_index) {
 267                         return (sctp_ifnp);
 268                 }
 269                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 270                         return (sctp_ifnp);
 271                 }
 272         }
 273         return (NULL);
 274 }
 275
 276
 277 struct sctp_vrf *
 278 sctp_find_vrf(uint32_t vrf_id)
 279 {
 280         struct sctp_vrflist *bucket;
 281         struct sctp_vrf *liste;
 282
 283         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 284         LIST_FOREACH(liste, bucket, next_vrf) {
 285                 if (vrf_id == liste->vrf_id) {
 286                         return (liste);
 287                 }
 288         }
 289         return (NULL);
 290 }
 291
 292
 293 void
 294 sctp_free_vrf(struct sctp_vrf *vrf)
 295 {
 296         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 297                 if (vrf->vrf_addr_hash) {
 298                     SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 299                     vrf->vrf_addr_hash = NULL;
 300                 }
 301                 /* We zero'd the count */
 302                 LIST_REMOVE(vrf, next_vrf);
 303                 SCTP_FREE(vrf, SCTP_M_VRF);
 304                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 305         }
 306 }
 307
 308
 309 void
 310 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 311 {
 312         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 313                 /* We zero'd the count */
 314                 if (sctp_ifnp->vrf) {
 315                         sctp_free_vrf(sctp_ifnp->vrf);
 316                 }
 317                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 318                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 319         }
 320 }
 321
 322
 323 void
 324 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 325 {
 326         struct sctp_ifn *sctp_ifnp;
 327
 328         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 329         if (sctp_ifnp != NULL) {
 330                 sctp_ifnp->ifn_mtu = mtu;
 331         }
 332 }
 333
 334
 335 void
 336 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 337 {
 338         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 339                 /* We zero'd the count */
 340                 if (sctp_ifap->ifn_p) {
 341                         sctp_free_ifn(sctp_ifap->ifn_p);
 342                 }
 343                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 344                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 345         }
 346 }
 347
 348
 349 static void
 350 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 351 {
 352         struct sctp_ifn *found;
 353
 354         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 355         if (found == NULL) {
 356                 /* Not in the list.. sorry */
 357                 return;
 358         }
 359         if (hold_addr_lock == 0) {
 360                 SCTP_IPI_ADDR_WLOCK();
 361         } else {
 362                 SCTP_IPI_ADDR_WLOCK_ASSERT();
 363         }
 364         LIST_REMOVE(sctp_ifnp, next_bucket);
 365         LIST_REMOVE(sctp_ifnp, next_ifn);
 366         if (hold_addr_lock == 0) {
 367                 SCTP_IPI_ADDR_WUNLOCK();
 368         }
 369         /* Take away the reference, and possibly free it */
 370         sctp_free_ifn(sctp_ifnp);
 371 }
 372
 373
 374 void
 375 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 376                         const char *if_name, uint32_t ifn_index)
 377 {
 378         struct sctp_vrf *vrf;
 379         struct sctp_ifa *sctp_ifap;
 380
 381         SCTP_IPI_ADDR_RLOCK();
 382         vrf = sctp_find_vrf(vrf_id);
 383         if (vrf == NULL) {
 384                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 385                 goto out;
 386
 387         }
 388         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 389         if (sctp_ifap == NULL) {
 390                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 391                 goto out;
 392         }
 393         if (sctp_ifap->ifn_p == NULL) {
 394                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
 395                 goto out;
 396         }
 397         if (if_name) {
 398                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 399                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 400                                 sctp_ifap->ifn_p->ifn_name, if_name);
 401                         goto out;
 402                 }
 403         } else {
 404                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 405                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 406                                 sctp_ifap->ifn_p->ifn_index, ifn_index);
 407                         goto out;
 408                 }
 409         }
 410
 411         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 412         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 413  out:
 414         SCTP_IPI_ADDR_RUNLOCK();
 415 }
 416
 417
 418 void
 419 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 420                       const char *if_name, uint32_t ifn_index)
 421 {
 422         struct sctp_vrf *vrf;
 423         struct sctp_ifa *sctp_ifap;
 424
 425         SCTP_IPI_ADDR_RLOCK();
 426         vrf = sctp_find_vrf(vrf_id);
 427         if (vrf == NULL) {
 428                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 429                 goto out;
 430
 431         }
 432         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 433         if (sctp_ifap == NULL) {
 434                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 435                 goto out;
 436         }
 437         if (sctp_ifap->ifn_p == NULL) {
 438                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
 439                 goto out;
 440         }
 441         if (if_name) {
 442                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 443                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 444                                 sctp_ifap->ifn_p->ifn_name, if_name);
 445                         goto out;
 446                 }
 447         } else {
 448                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 449                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 450                                 sctp_ifap->ifn_p->ifn_index, ifn_index);
 451                         goto out;
 452                 }
 453         }
 454
 455         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 456         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 457  out:
 458         SCTP_IPI_ADDR_RUNLOCK();
 459 }
 460
 461
 462 /*-
 463  * Add an ifa to an ifn.
 464  * Register the interface as necessary.
 465  * NOTE: ADDR write lock MUST be held.
 466  */
 467 static void
 468 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 469 {
 470         int ifa_af;
 471
 472         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 473         sctp_ifap->ifn_p = sctp_ifnp;
 474         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 475         /* update address counts */
 476         sctp_ifnp->ifa_count++;
 477         ifa_af = sctp_ifap->address.sa.sa_family;
 478         switch (ifa_af) {
 479 #ifdef INET
 480         case AF_INET:
 481                 sctp_ifnp->num_v4++;
 482                 break;
 483 #endif
 484 #ifdef INET6
 485         case AF_INET6:
 486                 sctp_ifnp->num_v6++;
 487                 break;
 488 #endif
 489         default:
 490                 break;
 491         }
 492         if (sctp_ifnp->ifa_count == 1) {
 493                 /* register the new interface */
 494                 sctp_ifnp->registered_af = ifa_af;
 495         }
 496 }
 497
 498
 499 /*-
 500  * Remove an ifa from its ifn.
 501  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 502  * the interface based on the remaining address families left.
 503  * NOTE: ADDR write lock MUST be held.
 504  */
 505 static void
 506 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 507 {
 508         LIST_REMOVE(sctp_ifap, next_ifa);
 509         if (sctp_ifap->ifn_p) {
 510                 /* update address counts */
 511                 sctp_ifap->ifn_p->ifa_count--;
 512                 switch (sctp_ifap->address.sa.sa_family) {
 513 #ifdef INET
 514                 case AF_INET:
 515                         sctp_ifap->ifn_p->num_v4--;
 516                         break;
 517 #endif
 518 #ifdef INET6
 519                 case AF_INET6:
 520                         sctp_ifap->ifn_p->num_v6--;
 521                         break;
 522 #endif
 523                 default:
 524                         break;
 525                 }
 526
 527                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 528                         /* remove the ifn, possibly freeing it */
 529                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 530                 } else {
 531                         /* re-register address family type, if needed */
 532                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 533                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 534                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 535                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 536                                    (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 537                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 538                         }
 539                         /* free the ifn refcount */
 540                         sctp_free_ifn(sctp_ifap->ifn_p);
 541                 }
 542                 sctp_ifap->ifn_p = NULL;
 543         }
 544 }
 545
 546
 547 struct sctp_ifa *
 548 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 549                      uint32_t ifn_type, const char *if_name, void *ifa,
 550                      struct sockaddr *addr, uint32_t ifa_flags,
 551                      int dynamic_add)
 552 {
 553         struct sctp_vrf *vrf;
 554         struct sctp_ifn *sctp_ifnp, *new_sctp_ifnp;
 555         struct sctp_ifa *sctp_ifap, *new_sctp_ifap;
 556         struct sctp_ifalist *hash_addr_head;
 557         struct sctp_ifnlist *hash_ifn_head;
 558         uint32_t hash_of_addr;
 559         int new_ifn_af = 0;
 560
 561 #ifdef SCTP_DEBUG
 562         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 563         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 564 #endif
 565         SCTP_MALLOC(new_sctp_ifnp, struct sctp_ifn *,
 566                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 567         if (new_sctp_ifnp == NULL) {
 568 #ifdef INVARIANTS
 569                 panic("No memory for IFN");
 570 #endif
 571                 return (NULL);
 572         }
 573         SCTP_MALLOC(new_sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 574         if (new_sctp_ifap == NULL) {
 575 #ifdef INVARIANTS
 576                 panic("No memory for IFA");
 577 #endif
 578                 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
 579                 return (NULL);
 580         }
 581
 582         SCTP_IPI_ADDR_WLOCK();
 583         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 584         if (sctp_ifnp) {
 585                 vrf = sctp_ifnp->vrf;
 586         } else {
 587                 vrf = sctp_find_vrf(vrf_id);
 588                 if (vrf == NULL) {
 589                         vrf = sctp_allocate_vrf(vrf_id);
 590                         if (vrf == NULL) {
 591                                 SCTP_IPI_ADDR_WUNLOCK();
 592                                 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
 593                                 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA);
 594                                 return (NULL);
 595                         }
 596                 }
 597         }
 598         if (sctp_ifnp == NULL) {
 599                 /* build one and add it, can't hold lock
 600                  * until after malloc done though.
 601                  */
 602                 sctp_ifnp = new_sctp_ifnp;
 603                 new_sctp_ifnp = NULL;
 604                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 605                 sctp_ifnp->ifn_index = ifn_index;
 606                 sctp_ifnp->ifn_p = ifn;
 607                 sctp_ifnp->ifn_type = ifn_type;
 608                 sctp_ifnp->refcount = 0;
 609                 sctp_ifnp->vrf = vrf;
 610                 atomic_add_int(&vrf->refcount, 1);
 611                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 612                 if (if_name != NULL) {
 613                         SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
 614                 } else {
 615                         SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
 616                 }
 617                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 618                 LIST_INIT(&sctp_ifnp->ifalist);
 619                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 620                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 621                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 622                 new_ifn_af = 1;
 623         }
 624         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 625         if (sctp_ifap) {
 626                 /* Hmm, it already exists? */
 627                 if ((sctp_ifap->ifn_p) &&
 628                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 629                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 630                                 sctp_ifap->ifn_p->ifn_name, ifn_index,
 631                                 (void *)sctp_ifap);
 632                         if (new_ifn_af) {
 633                                 /* Remove the created one that we don't want */
 634                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 635                         }
 636                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 637                                 /* easy to solve, just switch back to active */
 638                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 639                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 640                                 sctp_ifap->ifn_p = sctp_ifnp;
 641                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 642                         }
 643                 exit_stage_left:
 644                         SCTP_IPI_ADDR_WUNLOCK();
 645                         if (new_sctp_ifnp != NULL) {
 646                                 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
 647                         }
 648                         SCTP_FREE(new_sctp_ifap, SCTP_M_IFA);
 649                         return (sctp_ifap);
 650                 } else {
 651                         if (sctp_ifap->ifn_p) {
 652                                 /*
 653                                  * The last IFN gets the address, remove the
 654                                  * old one
 655                                  */
 656                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 657                                         (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 658                                         sctp_ifap->ifn_p->ifn_index, if_name,
 659                                         ifn_index);
 660                                 /* remove the address from the old ifn */
 661                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 662                                 /* move the address over to the new ifn */
 663                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 664                                 goto exit_stage_left;
 665                         } else {
 666                                 /* repair ifnp which was NULL ? */
 667                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 668                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 669                                         (void *)sctp_ifnp, (void *)sctp_ifap);
 670                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 671                         }
 672                         goto exit_stage_left;
 673                 }
 674         }
 675         sctp_ifap = new_sctp_ifap;
 676         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 677         sctp_ifap->ifn_p = sctp_ifnp;
 678         atomic_add_int(&sctp_ifnp->refcount, 1);
 679         sctp_ifap->vrf_id = vrf_id;
 680         sctp_ifap->ifa = ifa;
 681 #ifdef HAVE_SA_LEN
 682         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 683 #else
 684         switch (addr->sa_family) {
 685 #ifdef INET
 686         case AF_INET:
 687                 memcpy(&sctp_ifap->address, addr, sizeof(struct sockaddr_in));
 688                 break;
 689 #endif
 690 #ifdef INET6
 691         case AF_INET6:
 692                 memcpy(&sctp_ifap->address, addr, sizeof(struct sockaddr_in6));
 693                 break;
 694 #endif
 695 #if defined(__Userspace__)
 696         case AF_CONN:
 697                 memcpy(&sctp_ifap->address, addr, sizeof(struct sockaddr_conn));
 698                 break;
 699 #endif
 700         default:
 701                 /* TSNH */
 702                 break;
 703         }
 704 #endif
 705         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 706         sctp_ifap->flags = ifa_flags;
 707         /* Set scope */
 708         switch (sctp_ifap->address.sa.sa_family) {
 709 #ifdef INET
 710         case AF_INET:
 711         {
 712                 struct sockaddr_in *sin;
 713
 714                 sin = &sctp_ifap->address.sin;
 715                 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 716                     (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 717                         sctp_ifap->src_is_loop = 1;
 718                 }
 719                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 720                         sctp_ifap->src_is_priv = 1;
 721                 }
 722                 sctp_ifnp->num_v4++;
 723                 if (new_ifn_af)
 724                     new_ifn_af = AF_INET;
 725                 break;
 726         }
 727 #endif
 728 #ifdef INET6
 729         case AF_INET6:
 730         {
 731                 /* ok to use deprecated addresses? */
 732                 struct sockaddr_in6 *sin6;
 733
 734                 sin6 = &sctp_ifap->address.sin6;
 735                 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 736                     (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 737                         sctp_ifap->src_is_loop = 1;
 738                 }
 739                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 740                         sctp_ifap->src_is_priv = 1;
 741                 }
 742                 sctp_ifnp->num_v6++;
 743                 if (new_ifn_af)
 744                         new_ifn_af = AF_INET6;
 745                 break;
 746         }
 747 #endif
 748 #if defined(__Userspace__)
 749         case AF_CONN:
 750                 if (new_ifn_af)
 751                         new_ifn_af = AF_CONN;
 752                 break;
 753 #endif
 754         default:
 755                 new_ifn_af = 0;
 756                 break;
 757         }
 758         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 759
 760         if ((sctp_ifap->src_is_priv == 0) &&
 761             (sctp_ifap->src_is_loop == 0)) {
 762                 sctp_ifap->src_is_glob = 1;
 763         }
 764         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 765         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 766         sctp_ifap->refcount = 1;
 767         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 768         sctp_ifnp->ifa_count++;
 769         vrf->total_ifa_count++;
 770         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 771         if (new_ifn_af) {
 772                 sctp_ifnp->registered_af = new_ifn_af;
 773         }
 774         SCTP_IPI_ADDR_WUNLOCK();
 775         if (new_sctp_ifnp != NULL) {
 776                 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
 777         }
 778
 779         if (dynamic_add) {
 780                 /* Bump up the refcount so that when the timer
 781                  * completes it will drop back down.
 782                  */
 783                 struct sctp_laddr *wi;
 784
 785                 atomic_add_int(&sctp_ifap->refcount, 1);
 786                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 787                 if (wi == NULL) {
 788                         /*
 789                          * Gak, what can we do? We have lost an address
 790                          * change can you say HOSED?
 791                          */
 792                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 793                         /* Opps, must decrement the count */
 794                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 795                                                if_name);
 796                         return (NULL);
 797                 }
 798                 SCTP_INCR_LADDR_COUNT();
 799                 memset(wi, 0, sizeof(*wi));
 800                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 801                 wi->ifa = sctp_ifap;
 802                 wi->action = SCTP_ADD_IP_ADDRESS;
 803
 804                 SCTP_WQ_ADDR_LOCK();
 805                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 806                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 807                                  (struct sctp_inpcb *)NULL,
 808                                  (struct sctp_tcb *)NULL,
 809                                  (struct sctp_nets *)NULL);
 810                 SCTP_WQ_ADDR_UNLOCK();
 811         } else {
 812                 /* it's ready for use */
 813                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 814         }
 815         return (sctp_ifap);
 816 }
 817
 818 void
 819 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 820                        uint32_t ifn_index, const char *if_name)
 821 {
 822         struct sctp_vrf *vrf;
 823         struct sctp_ifa *sctp_ifap = NULL;
 824
 825         SCTP_IPI_ADDR_WLOCK();
 826         vrf = sctp_find_vrf(vrf_id);
 827         if (vrf == NULL) {
 828                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 829                 goto out_now;
 830         }
 831
 832 #ifdef SCTP_DEBUG
 833         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 834         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 835 #endif
 836         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 837         if (sctp_ifap) {
 838                 /* Validate the delete */
 839                 if (sctp_ifap->ifn_p) {
 840                         int valid = 0;
 841                         /*-
 842                          * The name has priority over the ifn_index
 843                          * if its given.
 844                          */
 845                         if (if_name) {
 846                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 847                                         /* They match its a correct delete */
 848                                         valid = 1;
 849                                 }
 850                         }
 851                         if (!valid) {
 852                                 /* last ditch check ifn_index */
 853                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 854                                         valid = 1;
 855                                 }
 856                         }
 857                         if (!valid) {
 858                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 859                                         ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 860                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 861                                         sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 862                                 SCTP_IPI_ADDR_WUNLOCK();
 863                                 return;
 864                         }
 865                 }
 866                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
 867                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 868                 /*
 869                  * We don't set the flag. This means that the structure will
 870                  * hang around in EP's that have bound specific to it until
 871                  * they close. This gives us TCP like behavior if someone
 872                  * removes an address (or for that matter adds it right back).
 873                  */
 874                 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
 875                 vrf->total_ifa_count--;
 876                 LIST_REMOVE(sctp_ifap, next_bucket);
 877                 sctp_remove_ifa_from_ifn(sctp_ifap);
 878         }
 879 #ifdef SCTP_DEBUG
 880         else {
 881                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 882                         ifn_index);
 883                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 884         }
 885 #endif
 886
 887  out_now:
 888         SCTP_IPI_ADDR_WUNLOCK();
 889         if (sctp_ifap) {
 890                 struct sctp_laddr *wi;
 891
 892                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 893                 if (wi == NULL) {
 894                         /*
 895                          * Gak, what can we do? We have lost an address
 896                          * change can you say HOSED?
 897                          */
 898                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 899
 900                         /* Oops, must decrement the count */
 901                         sctp_free_ifa(sctp_ifap);
 902                         return;
 903                 }
 904                 SCTP_INCR_LADDR_COUNT();
 905                 memset(wi, 0, sizeof(*wi));
 906                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 907                 wi->ifa = sctp_ifap;
 908                 wi->action = SCTP_DEL_IP_ADDRESS;
 909                 SCTP_WQ_ADDR_LOCK();
 910                 /*
 911                  * Should this really be a tailq? As it is we will process the
 912                  * newest first :-0
 913                  */
 914                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 915                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 916                                  (struct sctp_inpcb *)NULL,
 917                                  (struct sctp_tcb *)NULL,
 918                                  (struct sctp_nets *)NULL);
 919                 SCTP_WQ_ADDR_UNLOCK();
 920         }
 921         return;
 922 }
 923
 924
 925 static int
 926 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
 927 {
 928         int loopback_scope;
 929 #if defined(INET)
 930         int ipv4_local_scope, ipv4_addr_legal;
 931 #endif
 932 #if defined(INET6)
 933         int local_scope, site_scope, ipv6_addr_legal;
 934 #endif
 935 #if defined(__Userspace__)
 936         int conn_addr_legal;
 937 #endif
 938         struct sctp_vrf *vrf;
 939         struct sctp_ifn *sctp_ifn;
 940         struct sctp_ifa *sctp_ifa;
 941
 942         loopback_scope = stcb->asoc.scope.loopback_scope;
 943 #if defined(INET)
 944         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
 945         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
 946 #endif
 947 #if defined(INET6)
 948         local_scope = stcb->asoc.scope.local_scope;
 949         site_scope = stcb->asoc.scope.site_scope;
 950         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
 951 #endif
 952 #if defined(__Userspace__)
 953         conn_addr_legal = stcb->asoc.scope.conn_addr_legal;
 954 #endif
 955
 956         SCTP_IPI_ADDR_RLOCK();
 957         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
 958         if (vrf == NULL) {
 959                 /* no vrf, no addresses */
 960                 SCTP_IPI_ADDR_RUNLOCK();
 961                 return (0);
 962         }
 963
 964         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 965                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 966                         if ((loopback_scope == 0) &&
 967                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 968                                 continue;
 969                         }
 970                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 971                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
 972                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
 973                                         /* We allow pending addresses, where we
 974                                          * have sent an asconf-add to be considered
 975                                          * valid.
 976                                          */
 977                                         continue;
 978                                 }
 979                                 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
 980                                         continue;
 981                                 }
 982                                 switch (sctp_ifa->address.sa.sa_family) {
 983 #ifdef INET
 984                                 case AF_INET:
 985                                         if (ipv4_addr_legal) {
 986                                                 struct sockaddr_in *sin, *rsin;
 987
 988                                                 sin = &sctp_ifa->address.sin;
 989                                                 rsin = (struct sockaddr_in *)to;
 990                                                 if ((ipv4_local_scope == 0) &&
 991                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 992                                                         continue;
 993                                                 }
 994 #if defined(__FreeBSD__) && !defined(__Userspace__)
 995                                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
 996                                                                      &sin->sin_addr) != 0) {
 997                                                         continue;
 998                                                 }
 999 #endif
1000                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1001                                                         SCTP_IPI_ADDR_RUNLOCK();
1002                                                         return (1);
1003                                                 }
1004                                         }
1005                                         break;
1006 #endif
1007 #ifdef INET6
1008                                 case AF_INET6:
1009                                         if (ipv6_addr_legal) {
1010                                                 struct sockaddr_in6 *sin6, *rsin6;
1011 #if defined(SCTP_EMBEDDED_V6_SCOPE) && !defined(SCTP_KAME)
1012                                                 struct sockaddr_in6 lsa6;
1013 #endif
1014                                                 sin6 = &sctp_ifa->address.sin6;
1015                                                 rsin6 = (struct sockaddr_in6 *)to;
1016 #if defined(__FreeBSD__) && !defined(__Userspace__)
1017                                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
1018                                                                      &sin6->sin6_addr) != 0) {
1019                                                         continue;
1020                                                 }
1021 #endif
1022                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1023                                                         if (local_scope == 0)
1024                                                                 continue;
1025 #if defined(SCTP_EMBEDDED_V6_SCOPE)
1026                                                         if (sin6->sin6_scope_id == 0) {
1027 #ifdef SCTP_KAME
1028                                                                 if (sa6_recoverscope(sin6) != 0)
1029                                                                         continue;
1030 #else
1031                                                                 lsa6 = *sin6;
1032                                                                 if (in6_recoverscope(&lsa6,
1033                                                                                      &lsa6.sin6_addr,
1034                                                                                      NULL))
1035                                                                         continue;
1036                                                                 sin6 = &lsa6;
1037 #endif /* SCTP_KAME */
1038                                                         }
1039 #endif /* SCTP_EMBEDDED_V6_SCOPE */
1040                                                 }
1041                                                 if ((site_scope == 0) &&
1042                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1043                                                         continue;
1044                                                 }
1045                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1046                                                         SCTP_IPI_ADDR_RUNLOCK();
1047                                                         return (1);
1048                                                 }
1049                                         }
1050                                         break;
1051 #endif
1052 #if defined(__Userspace__)
1053                                 case AF_CONN:
1054                                         if (conn_addr_legal) {
1055                                                 struct sockaddr_conn *sconn, *rsconn;
1056
1057                                                 sconn = &sctp_ifa->address.sconn;
1058                                                 rsconn = (struct sockaddr_conn *)to;
1059                                                 if (sconn->sconn_addr == rsconn->sconn_addr) {
1060                                                         SCTP_IPI_ADDR_RUNLOCK();
1061                                                         return (1);
1062                                                 }
1063                                         }
1064                                         break;
1065 #endif
1066                                 default:
1067                                         /* TSNH */
1068                                         break;
1069                                 }
1070                         }
1071                 }
1072         } else {
1073                 struct sctp_laddr *laddr;
1074
1075                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
1076                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1077                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1078                                 continue;
1079                         }
1080                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
1081                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
1082                                 /* We allow pending addresses, where we
1083                                  * have sent an asconf-add to be considered
1084                                  * valid.
1085                                  */
1086                                 continue;
1087                         }
1088                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
1089                                 continue;
1090                         }
1091                         switch (to->sa_family) {
1092 #ifdef INET
1093                         case AF_INET:
1094                         {
1095                                 struct sockaddr_in *sin, *rsin;
1096
1097                                 sin = &laddr->ifa->address.sin;
1098                                 rsin = (struct sockaddr_in *)to;
1099                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1100                                         SCTP_IPI_ADDR_RUNLOCK();
1101                                         return (1);
1102                                 }
1103                                 break;
1104                         }
1105 #endif
1106 #ifdef INET6
1107                         case AF_INET6:
1108                         {
1109                                 struct sockaddr_in6 *sin6, *rsin6;
1110
1111                                 sin6 = &laddr->ifa->address.sin6;
1112                                 rsin6 = (struct sockaddr_in6 *)to;
1113                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1114                                         SCTP_IPI_ADDR_RUNLOCK();
1115                                         return (1);
1116                                 }
1117                                 break;
1118                         }
1119
1120 #endif
1121 #if defined(__Userspace__)
1122                         case AF_CONN:
1123                         {
1124                                 struct sockaddr_conn *sconn, *rsconn;
1125
1126                                 sconn = &laddr->ifa->address.sconn;
1127                                 rsconn = (struct sockaddr_conn *)to;
1128                                 if (sconn->sconn_addr == rsconn->sconn_addr) {
1129                                         SCTP_IPI_ADDR_RUNLOCK();
1130                                         return (1);
1131                                 }
1132                                 break;
1133                         }
1134 #endif
1135                         default:
1136                                 /* TSNH */
1137                                 break;
1138                         }
1139
1140                 }
1141         }
1142         SCTP_IPI_ADDR_RUNLOCK();
1143         return (0);
1144 }
1145
1146
1147 static struct sctp_tcb *
1148 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1149     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1150 {
1151         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1152         /*
1153          * If we support the TCP model, then we must now dig through to see
1154          * if we can find our endpoint in the list of tcp ep's.
1155          */
1156         uint16_t lport, rport;
1157         struct sctppcbhead *ephead;
1158         struct sctp_inpcb *inp;
1159         struct sctp_laddr *laddr;
1160         struct sctp_tcb *stcb;
1161         struct sctp_nets *net;
1162 #ifdef SCTP_MVRF
1163         int fnd, i;
1164 #endif
1165
1166         if ((to == NULL) || (from == NULL)) {
1167                 return (NULL);
1168         }
1169
1170         switch (to->sa_family) {
1171 #ifdef INET
1172         case AF_INET:
1173                 if (from->sa_family == AF_INET) {
1174                         lport = ((struct sockaddr_in *)to)->sin_port;
1175                         rport = ((struct sockaddr_in *)from)->sin_port;
1176                 } else {
1177                         return (NULL);
1178                 }
1179                 break;
1180 #endif
1181 #ifdef INET6
1182         case AF_INET6:
1183                 if (from->sa_family == AF_INET6) {
1184                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
1185                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
1186                 } else {
1187                         return (NULL);
1188                 }
1189                 break;
1190 #endif
1191 #if defined(__Userspace__)
1192         case AF_CONN:
1193                 if (from->sa_family == AF_CONN) {
1194                         lport = ((struct sockaddr_conn *)to)->sconn_port;
1195                         rport = ((struct sockaddr_conn *)from)->sconn_port;
1196                 } else {
1197                         return (NULL);
1198                 }
1199                 break;
1200 #endif
1201         default:
1202                 return (NULL);
1203         }
1204         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1205         /*
1206          * Ok now for each of the guys in this bucket we must look and see:
1207          * - Does the remote port match. - Does there single association's
1208          * addresses match this address (to). If so we update p_ep to point
1209          * to this ep and return the tcb from it.
1210          */
1211         LIST_FOREACH(inp, ephead, sctp_hash) {
1212                 SCTP_INP_RLOCK(inp);
1213                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1214                         SCTP_INP_RUNLOCK(inp);
1215                         continue;
1216                 }
1217                 if (lport != inp->sctp_lport) {
1218                         SCTP_INP_RUNLOCK(inp);
1219                         continue;
1220                 }
1221 #if defined(__FreeBSD__) && !defined(__Userspace__)
1222                 switch (to->sa_family) {
1223 #ifdef INET
1224                 case AF_INET:
1225                 {
1226                         struct sockaddr_in *sin;
1227
1228                         sin = (struct sockaddr_in *)to;
1229                         if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1230                                              &sin->sin_addr) != 0) {
1231                                 SCTP_INP_RUNLOCK(inp);
1232                                 continue;
1233                         }
1234                         break;
1235                 }
1236 #endif
1237 #ifdef INET6
1238                 case AF_INET6:
1239                 {
1240                         struct sockaddr_in6 *sin6;
1241
1242                         sin6 = (struct sockaddr_in6 *)to;
1243                         if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1244                                              &sin6->sin6_addr) != 0) {
1245                                 SCTP_INP_RUNLOCK(inp);
1246                                 continue;
1247                         }
1248                         break;
1249                 }
1250 #endif
1251                 default:
1252                         SCTP_INP_RUNLOCK(inp);
1253                         continue;
1254                 }
1255 #endif
1256 #ifdef SCTP_MVRF
1257                 fnd = 0;
1258                 for (i = 0; i < inp->num_vrfs; i++) {
1259                         if (inp->m_vrf_ids[i] == vrf_id) {
1260                                 fnd = 1;
1261                                 break;
1262                         }
1263                 }
1264                 if (fnd == 0) {
1265                         SCTP_INP_RUNLOCK(inp);
1266                         continue;
1267                 }
1268 #else
1269                 if (inp->def_vrf_id != vrf_id) {
1270                         SCTP_INP_RUNLOCK(inp);
1271                         continue;
1272                 }
1273 #endif
1274                 /* check to see if the ep has one of the addresses */
1275                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1276                         /* We are NOT bound all, so look further */
1277                         int match = 0;
1278
1279                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1280
1281                                 if (laddr->ifa == NULL) {
1282                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__);
1283                                         continue;
1284                                 }
1285                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1286                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1287                                         continue;
1288                                 }
1289                                 if (laddr->ifa->address.sa.sa_family ==
1290                                     to->sa_family) {
1291                                         /* see if it matches */
1292 #ifdef INET
1293                                         if (from->sa_family == AF_INET) {
1294                                                 struct sockaddr_in *intf_addr, *sin;
1295
1296                                                 intf_addr = &laddr->ifa->address.sin;
1297                                                 sin = (struct sockaddr_in *)to;
1298                                                 if (sin->sin_addr.s_addr ==
1299                                                     intf_addr->sin_addr.s_addr) {
1300                                                         match = 1;
1301                                                         break;
1302                                                 }
1303                                         }
1304 #endif
1305 #ifdef INET6
1306                                         if (from->sa_family == AF_INET6) {
1307                                                 struct sockaddr_in6 *intf_addr6;
1308                                                 struct sockaddr_in6 *sin6;
1309
1310                                                 sin6 = (struct sockaddr_in6 *)
1311                                                     to;
1312                                                 intf_addr6 = &laddr->ifa->address.sin6;
1313
1314                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1315                                                     intf_addr6)) {
1316                                                         match = 1;
1317                                                         break;
1318                                                 }
1319                                         }
1320 #endif
1321 #if defined(__Userspace__)
1322                                         if (from->sa_family == AF_CONN) {
1323                                                 struct sockaddr_conn *intf_addr, *sconn;
1324
1325                                                 intf_addr = &laddr->ifa->address.sconn;
1326                                                 sconn = (struct sockaddr_conn *)to;
1327                                                 if (sconn->sconn_addr ==
1328                                                     intf_addr->sconn_addr) {
1329                                                         match = 1;
1330                                                         break;
1331                                                 }
1332                                         }
1333 #endif
1334                                 }
1335                         }
1336                         if (match == 0) {
1337                                 /* This endpoint does not have this address */
1338                                 SCTP_INP_RUNLOCK(inp);
1339                                 continue;
1340                         }
1341                 }
1342                 /*
1343                  * Ok if we hit here the ep has the address, does it hold
1344                  * the tcb?
1345                  */
1346                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1347                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1348                 if (stcb == NULL) {
1349                         SCTP_INP_RUNLOCK(inp);
1350                         continue;
1351                 }
1352                 SCTP_TCB_LOCK(stcb);
1353                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1354                         SCTP_TCB_UNLOCK(stcb);
1355                         SCTP_INP_RUNLOCK(inp);
1356                         continue;
1357                 }
1358                 if (stcb->rport != rport) {
1359                         /* remote port does not match. */
1360                         SCTP_TCB_UNLOCK(stcb);
1361                         SCTP_INP_RUNLOCK(inp);
1362                         continue;
1363                 }
1364                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1365                         SCTP_TCB_UNLOCK(stcb);
1366                         SCTP_INP_RUNLOCK(inp);
1367                         continue;
1368                 }
1369                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1370                         SCTP_TCB_UNLOCK(stcb);
1371                         SCTP_INP_RUNLOCK(inp);
1372                         continue;
1373                 }
1374                 /* Does this TCB have a matching address? */
1375                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1376
1377                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1378                                 /* not the same family, can't be a match */
1379                                 continue;
1380                         }
1381                         switch (from->sa_family) {
1382 #ifdef INET
1383                         case AF_INET:
1384                         {
1385                                 struct sockaddr_in *sin, *rsin;
1386
1387                                 sin = (struct sockaddr_in *)&net->ro._l_addr;
1388                                 rsin = (struct sockaddr_in *)from;
1389                                 if (sin->sin_addr.s_addr ==
1390                                     rsin->sin_addr.s_addr) {
1391                                         /* found it */
1392                                         if (netp != NULL) {
1393                                                 *netp = net;
1394                                         }
1395                                         /* Update the endpoint pointer */
1396                                         *inp_p = inp;
1397                                         SCTP_INP_RUNLOCK(inp);
1398                                         return (stcb);
1399                                 }
1400                                 break;
1401                         }
1402 #endif
1403 #ifdef INET6
1404                         case AF_INET6:
1405                         {
1406                                 struct sockaddr_in6 *sin6, *rsin6;
1407
1408                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1409                                 rsin6 = (struct sockaddr_in6 *)from;
1410                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1411                                     rsin6)) {
1412                                         /* found it */
1413                                         if (netp != NULL) {
1414                                                 *netp = net;
1415                                         }
1416                                         /* Update the endpoint pointer */
1417                                         *inp_p = inp;
1418                                         SCTP_INP_RUNLOCK(inp);
1419                                         return (stcb);
1420                                 }
1421                                 break;
1422                         }
1423 #endif
1424 #if defined(__Userspace__)
1425                         case AF_CONN:
1426                         {
1427                                 struct sockaddr_conn *sconn, *rsconn;
1428
1429                                 sconn = (struct sockaddr_conn *)&net->ro._l_addr;
1430                                 rsconn = (struct sockaddr_conn *)from;
1431                                 if (sconn->sconn_addr == rsconn->sconn_addr) {
1432                                         /* found it */
1433                                         if (netp != NULL) {
1434                                                 *netp = net;
1435                                         }
1436                                         /* Update the endpoint pointer */
1437                                         *inp_p = inp;
1438                                         SCTP_INP_RUNLOCK(inp);
1439                                         return (stcb);
1440                                 }
1441                                 break;
1442                         }
1443 #endif
1444                         default:
1445                                 /* TSNH */
1446                                 break;
1447                         }
1448                 }
1449                 SCTP_TCB_UNLOCK(stcb);
1450                 SCTP_INP_RUNLOCK(inp);
1451         }
1452         return (NULL);
1453 }
1454
1455
1456 /*
1457  * rules for use
1458  *
1459  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1460  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1461  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1462  * NULL.
1463  */
1464
1465 struct sctp_tcb *
1466 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1467     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1468 {
1469         struct sctpasochead *head;
1470         struct sctp_inpcb *inp;
1471         struct sctp_tcb *stcb = NULL;
1472         struct sctp_nets *net;
1473         uint16_t rport;
1474
1475         inp = *inp_p;
1476         switch (remote->sa_family) {
1477 #ifdef INET
1478         case AF_INET:
1479                 rport = (((struct sockaddr_in *)remote)->sin_port);
1480                 break;
1481 #endif
1482 #ifdef INET6
1483         case AF_INET6:
1484                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1485                 break;
1486 #endif
1487 #if defined(__Userspace__)
1488         case AF_CONN:
1489                 rport = (((struct sockaddr_conn *)remote)->sconn_port);
1490                 break;
1491 #endif
1492         default:
1493                 return (NULL);
1494         }
1495         if (locked_tcb) {
1496                 /*
1497                  * UN-lock so we can do proper locking here this occurs when
1498                  * called from load_addresses_from_init.
1499                  */
1500                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1501                 SCTP_TCB_UNLOCK(locked_tcb);
1502         }
1503         SCTP_INP_INFO_RLOCK();
1504         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1505             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1506                 /*-
1507                  * Now either this guy is our listener or it's the
1508                  * connector. If it is the one that issued the connect, then
1509                  * it's only chance is to be the first TCB in the list. If
1510                  * it is the acceptor, then do the special_lookup to hash
1511                  * and find the real inp.
1512                  */
1513                 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) {
1514                         /* to is peer addr, from is my addr */
1515 #ifndef SCTP_MVRF
1516                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1517                             netp, inp->def_vrf_id);
1518                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1519                                 /* we have a locked tcb, lower refcount */
1520                                 SCTP_INP_DECR_REF(inp);
1521                         }
1522                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1523                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1524                                 SCTP_TCB_LOCK(locked_tcb);
1525                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1526                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1527                         }
1528 #else
1529                         /*-
1530                          * MVRF is tricky, we must look in every VRF
1531                          * the endpoint has.
1532                          */
1533                         int i;
1534
1535                         for (i = 0; i < inp->num_vrfs; i++) {
1536                                 stcb = sctp_tcb_special_locate(inp_p, remote, local,
1537                                                                netp, inp->m_vrf_ids[i]);
1538                                 if ((stcb != NULL) && (locked_tcb == NULL)) {
1539                                         /* we have a locked tcb, lower refcount */
1540                                         SCTP_INP_DECR_REF(inp);
1541                                         break;
1542                                 }
1543                                 if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1544                                         SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1545                                         SCTP_TCB_LOCK(locked_tcb);
1546                                         atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1547                                         SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1548                                         break;
1549                                 }
1550                         }
1551 #endif
1552                         SCTP_INP_INFO_RUNLOCK();
1553                         return (stcb);
1554                 } else {
1555                         SCTP_INP_WLOCK(inp);
1556                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1557                                 goto null_return;
1558                         }
1559                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1560                         if (stcb == NULL) {
1561                                 goto null_return;
1562                         }
1563                         SCTP_TCB_LOCK(stcb);
1564
1565                         if (stcb->rport != rport) {
1566                                 /* remote port does not match. */
1567                                 SCTP_TCB_UNLOCK(stcb);
1568                                 goto null_return;
1569                         }
1570                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1571                                 SCTP_TCB_UNLOCK(stcb);
1572                                 goto null_return;
1573                         }
1574                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1575                                 SCTP_TCB_UNLOCK(stcb);
1576                                 goto null_return;
1577                         }
1578                         /* now look at the list of remote addresses */
1579                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1580 #ifdef INVARIANTS
1581                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1582                                         panic("Corrupt net list");
1583                                 }
1584 #endif
1585                                 if (net->ro._l_addr.sa.sa_family !=
1586                                     remote->sa_family) {
1587                                         /* not the same family */
1588                                         continue;
1589                                 }
1590                                 switch (remote->sa_family) {
1591 #ifdef INET
1592                                 case AF_INET:
1593                                 {
1594                                         struct sockaddr_in *sin, *rsin;
1595
1596                                         sin = (struct sockaddr_in *)
1597                                             &net->ro._l_addr;
1598                                         rsin = (struct sockaddr_in *)remote;
1599                                         if (sin->sin_addr.s_addr ==
1600                                             rsin->sin_addr.s_addr) {
1601                                                 /* found it */
1602                                                 if (netp != NULL) {
1603                                                         *netp = net;
1604                                                 }
1605                                                 if (locked_tcb == NULL) {
1606                                                         SCTP_INP_DECR_REF(inp);
1607                                                 } else if (locked_tcb != stcb) {
1608                                                         SCTP_TCB_LOCK(locked_tcb);
1609                                                 }
1610                                                 if (locked_tcb) {
1611                                                         atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1612                                                 }
1613
1614                                                 SCTP_INP_WUNLOCK(inp);
1615                                                 SCTP_INP_INFO_RUNLOCK();
1616                                                 return (stcb);
1617                                         }
1618                                         break;
1619                                 }
1620 #endif
1621 #ifdef INET6
1622                                 case AF_INET6:
1623                                 {
1624                                         struct sockaddr_in6 *sin6, *rsin6;
1625
1626                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1627                                         rsin6 = (struct sockaddr_in6 *)remote;
1628                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1629                                             rsin6)) {
1630                                                 /* found it */
1631                                                 if (netp != NULL) {
1632                                                         *netp = net;
1633                                                 }
1634                                                 if (locked_tcb == NULL) {
1635                                                         SCTP_INP_DECR_REF(inp);
1636                                                 } else if (locked_tcb != stcb) {
1637                                                         SCTP_TCB_LOCK(locked_tcb);
1638                                                 }
1639                                                 if (locked_tcb) {
1640                                                         atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1641                                                 }
1642                                                 SCTP_INP_WUNLOCK(inp);
1643                                                 SCTP_INP_INFO_RUNLOCK();
1644                                                 return (stcb);
1645                                         }
1646                                         break;
1647                                 }
1648 #endif
1649 #if defined(__Userspace__)
1650                                 case AF_CONN:
1651                                 {
1652                                         struct sockaddr_conn *sconn, *rsconn;
1653
1654                                         sconn = (struct sockaddr_conn *)&net->ro._l_addr;
1655                                         rsconn = (struct sockaddr_conn *)remote;
1656                                         if (sconn->sconn_addr == rsconn->sconn_addr) {
1657                                                 /* found it */
1658                                                 if (netp != NULL) {
1659                                                         *netp = net;
1660                                                 }
1661                                                 if (locked_tcb == NULL) {
1662                                                         SCTP_INP_DECR_REF(inp);
1663                                                 } else if (locked_tcb != stcb) {
1664                                                         SCTP_TCB_LOCK(locked_tcb);
1665                                                 }
1666                                                 if (locked_tcb) {
1667                                                         atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1668                                                 }
1669                                                 SCTP_INP_WUNLOCK(inp);
1670                                                 SCTP_INP_INFO_RUNLOCK();
1671                                                 return (stcb);
1672                                         }
1673                                         break;
1674                                 }
1675 #endif
1676                                 default:
1677                                         /* TSNH */
1678                                         break;
1679                                 }
1680                         }
1681                         SCTP_TCB_UNLOCK(stcb);
1682                 }
1683         } else {
1684                 SCTP_INP_WLOCK(inp);
1685                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1686                         goto null_return;
1687                 }
1688                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1689                                                                inp->sctp_hashmark)];
1690                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1691                         if (stcb->rport != rport) {
1692                                 /* remote port does not match */
1693                                 continue;
1694                         }
1695                         SCTP_TCB_LOCK(stcb);
1696                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1697                                 SCTP_TCB_UNLOCK(stcb);
1698                                 continue;
1699                         }
1700                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1701                                 SCTP_TCB_UNLOCK(stcb);
1702                                 continue;
1703                         }
1704                         /* now look at the list of remote addresses */
1705                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1706 #ifdef INVARIANTS
1707                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1708                                         panic("Corrupt net list");
1709                                 }
1710 #endif
1711                                 if (net->ro._l_addr.sa.sa_family !=
1712                                     remote->sa_family) {
1713                                         /* not the same family */
1714                                         continue;
1715                                 }
1716                                 switch (remote->sa_family) {
1717 #ifdef INET
1718                                 case AF_INET:
1719                                 {
1720                                         struct sockaddr_in *sin, *rsin;
1721
1722                                         sin = (struct sockaddr_in *)
1723                                             &net->ro._l_addr;
1724                                         rsin = (struct sockaddr_in *)remote;
1725                                         if (sin->sin_addr.s_addr ==
1726                                             rsin->sin_addr.s_addr) {
1727                                                 /* found it */
1728                                                 if (netp != NULL) {
1729                                                         *netp = net;
1730                                                 }
1731                                                 if (locked_tcb == NULL) {
1732                                                         SCTP_INP_DECR_REF(inp);
1733                                                 } else if (locked_tcb != stcb) {
1734                                                         SCTP_TCB_LOCK(locked_tcb);
1735                                                 }
1736                                                 if (locked_tcb) {
1737                                                         atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1738                                                 }
1739                                                 SCTP_INP_WUNLOCK(inp);
1740                                                 SCTP_INP_INFO_RUNLOCK();
1741                                                 return (stcb);
1742                                         }
1743                                         break;
1744                                 }
1745 #endif
1746 #ifdef INET6
1747                                 case AF_INET6:
1748                                 {
1749                                         struct sockaddr_in6 *sin6, *rsin6;
1750
1751                                         sin6 = (struct sockaddr_in6 *)
1752                                             &net->ro._l_addr;
1753                                         rsin6 = (struct sockaddr_in6 *)remote;
1754                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1755                                             rsin6)) {
1756                                                 /* found it */
1757                                                 if (netp != NULL) {
1758                                                         *netp = net;
1759                                                 }
1760                                                 if (locked_tcb == NULL) {
1761                                                         SCTP_INP_DECR_REF(inp);
1762                                                 } else if (locked_tcb != stcb) {
1763                                                         SCTP_TCB_LOCK(locked_tcb);
1764                                                 }
1765                                                 if (locked_tcb) {
1766                                                         atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1767                                                 }
1768                                                 SCTP_INP_WUNLOCK(inp);
1769                                                 SCTP_INP_INFO_RUNLOCK();
1770                                                 return (stcb);
1771                                         }
1772                                         break;
1773                                 }
1774 #endif
1775 #if defined(__Userspace__)
1776                                 case AF_CONN:
1777                                 {
1778                                         struct sockaddr_conn *sconn, *rsconn;
1779
1780                                         sconn = (struct sockaddr_conn *)&net->ro._l_addr;
1781                                         rsconn = (struct sockaddr_conn *)remote;
1782                                         if (sconn->sconn_addr == rsconn->sconn_addr) {
1783                                                 /* found it */
1784                                                 if (netp != NULL) {
1785                                                         *netp = net;
1786                                                 }
1787                                                 if (locked_tcb == NULL) {
1788                                                         SCTP_INP_DECR_REF(inp);
1789                                                 } else if (locked_tcb != stcb) {
1790                                                         SCTP_TCB_LOCK(locked_tcb);
1791                                                 }
1792                                                 if (locked_tcb) {
1793                                                         atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1794                                                 }
1795                                                 SCTP_INP_WUNLOCK(inp);
1796                                                 SCTP_INP_INFO_RUNLOCK();
1797                                                 return (stcb);
1798                                         }
1799                                         break;
1800                                 }
1801 #endif
1802                                 default:
1803                                         /* TSNH */
1804                                         break;
1805                                 }
1806                         }
1807                         SCTP_TCB_UNLOCK(stcb);
1808                 }
1809         }
1810 null_return:
1811         /* clean up for returning null */
1812         if (locked_tcb) {
1813                 SCTP_TCB_LOCK(locked_tcb);
1814                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1815         }
1816         SCTP_INP_WUNLOCK(inp);
1817         SCTP_INP_INFO_RUNLOCK();
1818         /* not found */
1819         return (NULL);
1820 }
1821
1822
1823 /*
1824  * Find an association for a specific endpoint using the association id given
1825  * out in the COMM_UP notification
1826  */
1827 struct sctp_tcb *
1828 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1829 {
1830         /*
1831          * Use my the assoc_id to find a endpoint
1832          */
1833         struct sctpasochead *head;
1834         struct sctp_tcb *stcb;
1835         uint32_t id;
1836
1837         if (inp == NULL) {
1838                 SCTP_PRINTF("TSNH ep_associd\n");
1839                 return (NULL);
1840         }
1841         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1842                 SCTP_PRINTF("TSNH ep_associd0\n");
1843                 return (NULL);
1844         }
1845         id = (uint32_t)asoc_id;
1846         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1847         if (head == NULL) {
1848                 /* invalid id TSNH */
1849                 SCTP_PRINTF("TSNH ep_associd1\n");
1850                 return (NULL);
1851         }
1852         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1853                 if (stcb->asoc.assoc_id == id) {
1854                         if (inp != stcb->sctp_ep) {
1855                                 /*
1856                                  * some other guy has the same id active (id
1857                                  * collision ??).
1858                                  */
1859                                 SCTP_PRINTF("TSNH ep_associd2\n");
1860                                 continue;
1861                         }
1862                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1863                                 continue;
1864                         }
1865                         if (want_lock) {
1866                                 SCTP_TCB_LOCK(stcb);
1867                         }
1868                         return (stcb);
1869                 }
1870         }
1871         return (NULL);
1872 }
1873
1874
1875 struct sctp_tcb *
1876 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1877 {
1878         struct sctp_tcb *stcb;
1879
1880         SCTP_INP_RLOCK(inp);
1881         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1882         SCTP_INP_RUNLOCK(inp);
1883         return (stcb);
1884 }
1885
1886
1887 /*
1888  * Endpoint probe expects that the INP_INFO is locked.
1889  */
1890 static struct sctp_inpcb *
1891 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1892                     uint16_t lport, uint32_t vrf_id)
1893 {
1894         struct sctp_inpcb *inp;
1895         struct sctp_laddr *laddr;
1896 #ifdef INET
1897         struct sockaddr_in *sin;
1898 #endif
1899 #ifdef INET6
1900         struct sockaddr_in6 *sin6;
1901         struct sockaddr_in6 *intf_addr6;
1902 #endif
1903 #if defined(__Userspace__)
1904         struct sockaddr_conn *sconn;
1905 #endif
1906 #ifdef SCTP_MVRF
1907         int i;
1908 #endif
1909         int  fnd;
1910
1911 #ifdef INET
1912         sin = NULL;
1913 #endif
1914 #ifdef INET6
1915         sin6 = NULL;
1916 #endif
1917 #if defined(__Userspace__)
1918         sconn = NULL;
1919 #endif
1920         switch (nam->sa_family) {
1921 #ifdef INET
1922         case AF_INET:
1923                 sin = (struct sockaddr_in *)nam;
1924                 break;
1925 #endif
1926 #ifdef INET6
1927         case AF_INET6:
1928                 sin6 = (struct sockaddr_in6 *)nam;
1929                 break;
1930 #endif
1931 #if defined(__Userspace__)
1932         case AF_CONN:
1933                 sconn = (struct sockaddr_conn *)nam;
1934                 break;
1935 #endif
1936         default:
1937                 /* unsupported family */
1938                 return (NULL);
1939         }
1940
1941         if (head == NULL)
1942                 return (NULL);
1943
1944         LIST_FOREACH(inp, head, sctp_hash) {
1945                 SCTP_INP_RLOCK(inp);
1946                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1947                         SCTP_INP_RUNLOCK(inp);
1948                         continue;
1949                 }
1950                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1951                     (inp->sctp_lport == lport)) {
1952                         /* got it */
1953                         switch (nam->sa_family) {
1954 #ifdef INET
1955                         case AF_INET:
1956                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1957                                     SCTP_IPV6_V6ONLY(inp)) {
1958                                         /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1959                                         SCTP_INP_RUNLOCK(inp);
1960                                         continue;
1961                                 }
1962 #if defined(__FreeBSD__) && !defined(__Userspace__)
1963                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1964                                                      &sin->sin_addr) != 0) {
1965                                         SCTP_INP_RUNLOCK(inp);
1966                                         continue;
1967                                 }
1968 #endif
1969                                 break;
1970 #endif
1971 #ifdef INET6
1972                         case AF_INET6:
1973                                 /* A V6 address and the endpoint is NOT bound V6 */
1974                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1975                                         SCTP_INP_RUNLOCK(inp);
1976                                         continue;
1977                                 }
1978 #if defined(__FreeBSD__) && !defined(__Userspace__)
1979                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1980                                                      &sin6->sin6_addr) != 0) {
1981                                         SCTP_INP_RUNLOCK(inp);
1982                                         continue;
1983                                 }
1984 #endif
1985                                 break;
1986 #endif
1987                         default:
1988                                 break;
1989                         }
1990                         /* does a VRF id match? */
1991                         fnd = 0;
1992 #ifdef SCTP_MVRF
1993                         for (i = 0; i < inp->num_vrfs; i++) {
1994                                 if (inp->m_vrf_ids[i] == vrf_id) {
1995                                         fnd = 1;
1996                                         break;
1997                                 }
1998                         }
1999 #else
2000                         if (inp->def_vrf_id == vrf_id)
2001                                 fnd = 1;
2002 #endif
2003
2004                         SCTP_INP_RUNLOCK(inp);
2005                         if (!fnd)
2006                                 continue;
2007                         return (inp);
2008                 }
2009                 SCTP_INP_RUNLOCK(inp);
2010         }
2011         switch (nam->sa_family) {
2012 #ifdef INET
2013         case AF_INET:
2014                 if (sin->sin_addr.s_addr == INADDR_ANY) {
2015                         /* Can't hunt for one that has no address specified */
2016                         return (NULL);
2017                 }
2018                 break;
2019 #endif
2020 #ifdef INET6
2021         case AF_INET6:
2022                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2023                         /* Can't hunt for one that has no address specified */
2024                         return (NULL);
2025                 }
2026                 break;
2027 #endif
2028 #if defined(__Userspace__)
2029         case AF_CONN:
2030                 if (sconn->sconn_addr == NULL) {
2031                         return (NULL);
2032                 }
2033                 break;
2034 #endif
2035         default:
2036                 break;
2037         }
2038         /*
2039          * ok, not bound to all so see if we can find a EP bound to this
2040          * address.
2041          */
2042         LIST_FOREACH(inp, head, sctp_hash) {
2043                 SCTP_INP_RLOCK(inp);
2044                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2045                         SCTP_INP_RUNLOCK(inp);
2046                         continue;
2047                 }
2048                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
2049                         SCTP_INP_RUNLOCK(inp);
2050                         continue;
2051                 }
2052                 /*
2053                  * Ok this could be a likely candidate, look at all of its
2054                  * addresses
2055                  */
2056                 if (inp->sctp_lport != lport) {
2057                         SCTP_INP_RUNLOCK(inp);
2058                         continue;
2059                 }
2060                 /* does a VRF id match? */
2061                 fnd = 0;
2062 #ifdef SCTP_MVRF
2063                 for (i = 0; i < inp->num_vrfs; i++) {
2064                         if (inp->m_vrf_ids[i] == vrf_id) {
2065                                 fnd = 1;
2066                                 break;
2067                         }
2068                 }
2069 #else
2070                 if (inp->def_vrf_id == vrf_id)
2071                         fnd = 1;
2072
2073 #endif
2074                 if (!fnd) {
2075                         SCTP_INP_RUNLOCK(inp);
2076                         continue;
2077                 }
2078                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2079                         if (laddr->ifa == NULL) {
2080                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
2081                                         __func__);
2082                                 continue;
2083                         }
2084                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
2085                                 (void *)laddr->ifa);
2086                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
2087                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
2088                                 continue;
2089                         }
2090                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
2091                                 /* possible, see if it matches */
2092                                 switch (nam->sa_family) {
2093 #ifdef INET
2094                                 case AF_INET:
2095 #if defined(__APPLE__) && !defined(__Userspace__)
2096                                         if (sin == NULL) {
2097                                                 /* TSNH */
2098                                                 break;
2099                                         }
2100 #endif
2101                                         if (sin->sin_addr.s_addr ==
2102                                             laddr->ifa->address.sin.sin_addr.s_addr) {
2103                                                 SCTP_INP_RUNLOCK(inp);
2104                                                 return (inp);
2105                                         }
2106                                         break;
2107 #endif
2108 #ifdef INET6
2109                                 case AF_INET6:
2110                                         intf_addr6 = &laddr->ifa->address.sin6;
2111                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
2112                                             intf_addr6)) {
2113                                                 SCTP_INP_RUNLOCK(inp);
2114                                                 return (inp);
2115                                         }
2116                                         break;
2117 #endif
2118 #if defined(__Userspace__)
2119                                 case AF_CONN:
2120                                         if (sconn->sconn_addr == laddr->ifa->address.sconn.sconn_addr) {
2121                                                 SCTP_INP_RUNLOCK(inp);
2122                                                 return (inp);
2123                                         }
2124                                         break;
2125 #endif
2126                                 }
2127                         }
2128                 }
2129                 SCTP_INP_RUNLOCK(inp);
2130         }
2131         return (NULL);
2132 }
2133
2134
2135 static struct sctp_inpcb *
2136 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
2137 {
2138         struct sctppcbhead *head;
2139         struct sctp_inpcb *t_inp;
2140 #ifdef SCTP_MVRF
2141         int i;
2142 #endif
2143         int fnd;
2144
2145         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
2146             SCTP_BASE_INFO(hashmark))];
2147         LIST_FOREACH(t_inp, head, sctp_hash) {
2148                 if (t_inp->sctp_lport != lport) {
2149                         continue;
2150                 }
2151                 /* is it in the VRF in question */
2152                 fnd = 0;
2153 #ifdef SCTP_MVRF
2154                 for (i = 0; i < inp->num_vrfs; i++) {
2155                         if (t_inp->m_vrf_ids[i] == vrf_id) {
2156                                 fnd = 1;
2157                                 break;
2158                         }
2159                 }
2160 #else
2161                 if (t_inp->def_vrf_id == vrf_id)
2162                         fnd = 1;
2163 #endif
2164                 if (!fnd)
2165                         continue;
2166
2167                 /* This one is in use. */
2168                 /* check the v6/v4 binding issue */
2169                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2170                     SCTP_IPV6_V6ONLY(t_inp)) {
2171                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2172                                 /* collision in V6 space */
2173                                 return (t_inp);
2174                         } else {
2175                                 /* inp is BOUND_V4 no conflict */
2176                                 continue;
2177                         }
2178                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2179                         /* t_inp is bound v4 and v6, conflict always */
2180                         return (t_inp);
2181                 } else {
2182                         /* t_inp is bound only V4 */
2183                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2184                             SCTP_IPV6_V6ONLY(inp)) {
2185                                 /* no conflict */
2186                                 continue;
2187                         }
2188                         /* else fall through to conflict */
2189                 }
2190                 return (t_inp);
2191         }
2192         return (NULL);
2193 }
2194
2195
2196 int
2197 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
2198 {
2199         /* For 1-2-1 with port reuse */
2200         struct sctppcbhead *head;
2201         struct sctp_inpcb *tinp, *ninp;
2202
2203         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
2204                 /* only works with port reuse on */
2205                 return (-1);
2206         }
2207         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
2208                 return (0);
2209         }
2210         SCTP_INP_RUNLOCK(inp);
2211         SCTP_INP_INFO_WLOCK();
2212         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
2213                                             SCTP_BASE_INFO(hashmark))];
2214         /* Kick out all non-listeners to the TCP hash */
2215         LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
2216                 if (tinp->sctp_lport != inp->sctp_lport) {
2217                         continue;
2218                 }
2219                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2220                         continue;
2221                 }
2222                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
2223                         continue;
2224                 }
2225                 if (SCTP_IS_LISTENING(tinp)) {
2226                         continue;
2227                 }
2228                 SCTP_INP_WLOCK(tinp);
2229                 LIST_REMOVE(tinp, sctp_hash);
2230                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
2231                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
2232                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
2233                 SCTP_INP_WUNLOCK(tinp);
2234         }
2235         SCTP_INP_WLOCK(inp);
2236         /* Pull from where he was */
2237         LIST_REMOVE(inp, sctp_hash);
2238         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
2239         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
2240         LIST_INSERT_HEAD(head, inp, sctp_hash);
2241         SCTP_INP_WUNLOCK(inp);
2242         SCTP_INP_RLOCK(inp);
2243         SCTP_INP_INFO_WUNLOCK();
2244         return (0);
2245 }
2246
2247
2248 struct sctp_inpcb *
2249 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
2250                 uint32_t vrf_id)
2251 {
2252         /*
2253          * First we check the hash table to see if someone has this port
2254          * bound with just the port.
2255          */
2256         struct sctp_inpcb *inp;
2257         struct sctppcbhead *head;
2258         int lport;
2259         unsigned int i;
2260 #ifdef INET
2261         struct sockaddr_in *sin;
2262 #endif
2263 #ifdef INET6
2264         struct sockaddr_in6 *sin6;
2265 #endif
2266 #if defined(__Userspace__)
2267         struct sockaddr_conn *sconn;
2268 #endif
2269
2270         switch (nam->sa_family) {
2271 #ifdef INET
2272         case AF_INET:
2273                 sin = (struct sockaddr_in *)nam;
2274                 lport = sin->sin_port;
2275                 break;
2276 #endif
2277 #ifdef INET6
2278         case AF_INET6:
2279                 sin6 = (struct sockaddr_in6 *)nam;
2280                 lport = sin6->sin6_port;
2281                 break;
2282 #endif
2283 #if defined(__Userspace__)
2284         case AF_CONN:
2285                 sconn = (struct sockaddr_conn *)nam;
2286                 lport = sconn->sconn_port;
2287                 break;
2288 #endif
2289         default:
2290                 return (NULL);
2291         }
2292         /*
2293          * I could cheat here and just cast to one of the types but we will
2294          * do it right. It also provides the check against an Unsupported
2295          * type too.
2296          */
2297         /* Find the head of the ALLADDR chain */
2298         if (have_lock == 0) {
2299                 SCTP_INP_INFO_RLOCK();
2300         }
2301         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
2302             SCTP_BASE_INFO(hashmark))];
2303         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
2304
2305         /*
2306          * If the TCP model exists it could be that the main listening
2307          * endpoint is gone but there still exists a connected socket for this
2308          * guy. If so we can return the first one that we find. This may NOT
2309          * be the correct one so the caller should be wary on the returned INP.
2310          * Currently the only caller that sets find_tcp_pool is in bindx where
2311          * we are verifying that a user CAN bind the address. He either
2312          * has bound it already, or someone else has, or its open to bind,
2313          * so this is good enough.
2314          */
2315         if (inp == NULL && find_tcp_pool) {
2316                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
2317                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
2318                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
2319                         if (inp) {
2320                                 break;
2321                         }
2322                 }
2323         }
2324         if (inp) {
2325                 SCTP_INP_INCR_REF(inp);
2326         }
2327         if (have_lock == 0) {
2328                 SCTP_INP_INFO_RUNLOCK();
2329         }
2330         return (inp);
2331 }
2332
2333
2334 /*
2335  * Find an association for an endpoint with the pointer to whom you want to
2336  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
2337  * need to change the *to to some other struct like a mbuf...
2338  */
2339 struct sctp_tcb *
2340 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
2341     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
2342     uint32_t vrf_id)
2343 {
2344         struct sctp_inpcb *inp = NULL;
2345         struct sctp_tcb *stcb;
2346
2347         SCTP_INP_INFO_RLOCK();
2348         if (find_tcp_pool) {
2349                 if (inp_p != NULL) {
2350                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2351                                                        vrf_id);
2352                 } else {
2353                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2354                                                        vrf_id);
2355                 }
2356                 if (stcb != NULL) {
2357                         SCTP_INP_INFO_RUNLOCK();
2358                         return (stcb);
2359                 }
2360         }
2361         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2362         if (inp_p != NULL) {
2363                 *inp_p = inp;
2364         }
2365         SCTP_INP_INFO_RUNLOCK();
2366         if (inp == NULL) {
2367                 return (NULL);
2368         }
2369         /*
2370          * ok, we have an endpoint, now lets find the assoc for it (if any)
2371          * we now place the source address or from in the to of the find
2372          * endpoint call. Since in reality this chain is used from the
2373          * inbound packet side.
2374          */
2375         if (inp_p != NULL) {
2376                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2377                                                     NULL);
2378         } else {
2379                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2380                                                     NULL);
2381         }
2382         return (stcb);
2383 }
2384
2385
2386 /*
2387  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2388  * find all addresses that the sender has specified in any address list. Each
2389  * address will be used to lookup the TCB and see if one exits.
2390  */
2391 static struct sctp_tcb *
2392 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2393     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2394     struct sockaddr *dst)
2395 {
2396         struct sctp_paramhdr *phdr, param_buf;
2397 #if defined(INET) || defined(INET6)
2398         struct sctp_tcb *stcb;
2399         uint16_t ptype;
2400 #endif
2401         uint16_t plen;
2402 #ifdef INET
2403         struct sockaddr_in sin4;
2404 #endif
2405 #ifdef INET6
2406         struct sockaddr_in6 sin6;
2407 #endif
2408
2409 #ifdef INET
2410         memset(&sin4, 0, sizeof(sin4));
2411 #ifdef HAVE_SIN_LEN
2412         sin4.sin_len = sizeof(sin4);
2413 #endif
2414         sin4.sin_family = AF_INET;
2415         sin4.sin_port = sh->src_port;
2416 #endif
2417 #ifdef INET6
2418         memset(&sin6, 0, sizeof(sin6));
2419 #ifdef HAVE_SIN6_LEN
2420         sin6.sin6_len = sizeof(sin6);
2421 #endif
2422         sin6.sin6_family = AF_INET6;
2423         sin6.sin6_port = sh->src_port;
2424 #endif
2425
2426         offset += sizeof(struct sctp_init_chunk);
2427
2428         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
2429         while (phdr != NULL) {
2430                 /* now we must see if we want the parameter */
2431 #if defined(INET) || defined(INET6)
2432                 ptype = ntohs(phdr->param_type);
2433 #endif
2434                 plen = ntohs(phdr->param_length);
2435                 if (plen == 0) {
2436                         break;
2437                 }
2438 #ifdef INET
2439                 if (ptype == SCTP_IPV4_ADDRESS &&
2440                     plen == sizeof(struct sctp_ipv4addr_param)) {
2441                         /* Get the rest of the address */
2442                         struct sctp_ipv4addr_param ip4_param, *p4;
2443
2444                         phdr = sctp_get_next_param(m, offset,
2445                             (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param));
2446                         if (phdr == NULL) {
2447                                 return (NULL);
2448                         }
2449                         p4 = (struct sctp_ipv4addr_param *)phdr;
2450                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2451                         /* look it up */
2452                         stcb = sctp_findassociation_ep_addr(inp_p,
2453                             (struct sockaddr *)&sin4, netp, dst, NULL);
2454                         if (stcb != NULL) {
2455                                 return (stcb);
2456                         }
2457                 }
2458 #endif
2459 #ifdef INET6
2460                 if (ptype == SCTP_IPV6_ADDRESS &&
2461                     plen == sizeof(struct sctp_ipv6addr_param)) {
2462                         /* Get the rest of the address */
2463                         struct sctp_ipv6addr_param ip6_param, *p6;
2464
2465                         phdr = sctp_get_next_param(m, offset,
2466                             (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param));
2467                         if (phdr == NULL) {
2468                                 return (NULL);
2469                         }
2470                         p6 = (struct sctp_ipv6addr_param *)phdr;
2471                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2472                         /* look it up */
2473                         stcb = sctp_findassociation_ep_addr(inp_p,
2474                             (struct sockaddr *)&sin6, netp, dst, NULL);
2475                         if (stcb != NULL) {
2476                                 return (stcb);
2477                         }
2478                 }
2479 #endif
2480                 offset += SCTP_SIZE32(plen);
2481                 phdr = sctp_get_next_param(m, offset, &param_buf,
2482                                            sizeof(param_buf));
2483         }
2484         return (NULL);
2485 }
2486
2487 static struct sctp_tcb *
2488 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2489                        struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2490                        uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2491 {
2492         /*
2493          * Use my vtag to hash. If we find it we then verify the source addr
2494          * is in the assoc. If all goes well we save a bit on rec of a
2495          * packet.
2496          */
2497         struct sctpasochead *head;
2498         struct sctp_nets *net;
2499         struct sctp_tcb *stcb;
2500 #ifdef SCTP_MVRF
2501         unsigned int i;
2502 #endif
2503
2504         SCTP_INP_INFO_RLOCK();
2505         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2506                                                                 SCTP_BASE_INFO(hashasocmark))];
2507         LIST_FOREACH(stcb, head, sctp_asocs) {
2508                 SCTP_INP_RLOCK(stcb->sctp_ep);
2509                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2510                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2511                         continue;
2512                 }
2513 #ifdef SCTP_MVRF
2514                 for (i = 0; i < stcb->sctp_ep->num_vrfs; i++) {
2515                         if (stcb->sctp_ep->m_vrf_ids[i] == vrf_id) {
2516                                 break;
2517                         }
2518                 }
2519                 if (i == stcb->sctp_ep->num_vrfs) {
2520                         SCTP_INP_RUNLOCK(inp);
2521                         continue;
2522                 }
2523 #else
2524                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2525                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2526                         continue;
2527                 }
2528 #endif
2529                 SCTP_TCB_LOCK(stcb);
2530                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2531                 if (stcb->asoc.my_vtag == vtag) {
2532                         /* candidate */
2533                         if (stcb->rport != rport) {
2534                                 SCTP_TCB_UNLOCK(stcb);
2535                                 continue;
2536                         }
2537                         if (stcb->sctp_ep->sctp_lport != lport) {
2538                                 SCTP_TCB_UNLOCK(stcb);
2539                                 continue;
2540                         }
2541                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2542                                 SCTP_TCB_UNLOCK(stcb);
2543                                 continue;
2544                         }
2545                         /* RRS:Need toaddr check here */
2546                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2547                                 /* Endpoint does not own this address */
2548                                 SCTP_TCB_UNLOCK(stcb);
2549                                 continue;
2550                         }
2551                         if (remote_tag) {
2552                                 /* If we have both vtags that's all we match on */
2553                                 if (stcb->asoc.peer_vtag == remote_tag) {
2554                                         /* If both tags match we consider it conclusive
2555                                          * and check NO source/destination addresses
2556                                          */
2557                                         goto conclusive;
2558                                 }
2559                         }
2560                         if (skip_src_check) {
2561                         conclusive:
2562                                 if (from) {
2563                                         *netp = sctp_findnet(stcb, from);
2564                                 } else {
2565                                         *netp = NULL;   /* unknown */
2566                                 }
2567                                 if (inp_p)
2568                                         *inp_p = stcb->sctp_ep;
2569                                 SCTP_INP_INFO_RUNLOCK();
2570                                 return (stcb);
2571                         }
2572                         net = sctp_findnet(stcb, from);
2573                         if (net) {
2574                                 /* yep its him. */
2575                                 *netp = net;
2576                                 SCTP_STAT_INCR(sctps_vtagexpress);
2577                                 *inp_p = stcb->sctp_ep;
2578                                 SCTP_INP_INFO_RUNLOCK();
2579                                 return (stcb);
2580                         } else {
2581                                 /*
2582                                  * not him, this should only happen in rare
2583                                  * cases so I peg it.
2584                                  */
2585                                 SCTP_STAT_INCR(sctps_vtagbogus);
2586                         }
2587                 }
2588                 SCTP_TCB_UNLOCK(stcb);
2589         }
2590         SCTP_INP_INFO_RUNLOCK();
2591         return (NULL);
2592 }
2593
2594
2595 /*
2596  * Find an association with the pointer to the inbound IP packet. This can be
2597  * a IPv4 or IPv6 packet.
2598  */
2599 struct sctp_tcb *
2600 sctp_findassociation_addr(struct mbuf *m, int offset,
2601     struct sockaddr *src, struct sockaddr *dst,
2602     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2603     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2604 {
2605         struct sctp_tcb *stcb;
2606         struct sctp_inpcb *inp;
2607
2608         if (sh->v_tag) {
2609                 /* we only go down this path if vtag is non-zero */
2610                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2611                                               inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2612                 if (stcb) {
2613                         return (stcb);
2614                 }
2615         }
2616
2617         if (inp_p) {
2618                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2619                                                     1, vrf_id);
2620                 inp = *inp_p;
2621         } else {
2622                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2623                                                     1, vrf_id);
2624         }
2625         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2626         if (stcb == NULL && inp) {
2627                 /* Found a EP but not this address */
2628                 if ((ch->chunk_type == SCTP_INITIATION) ||
2629                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2630                         /*-
2631                          * special hook, we do NOT return linp or an
2632                          * association that is linked to an existing
2633                          * association that is under the TCP pool (i.e. no
2634                          * listener exists). The endpoint finding routine
2635                          * will always find a listener before examining the
2636                          * TCP pool.
2637                          */
2638                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2639                                 if (inp_p) {
2640                                         *inp_p = NULL;
2641                                 }
2642                                 return (NULL);
2643                         }
2644                         stcb = sctp_findassociation_special_addr(m,
2645                             offset, sh, &inp, netp, dst);
2646                         if (inp_p != NULL) {
2647                                 *inp_p = inp;
2648                         }
2649                 }
2650         }
2651         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2652         return (stcb);
2653 }
2654
2655 /*
2656  * lookup an association by an ASCONF lookup address.
2657  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2658  */
2659 struct sctp_tcb *
2660 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2661                                struct sockaddr *dst, struct sctphdr *sh,
2662                                struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2663 {
2664         struct sctp_tcb *stcb;
2665         union sctp_sockstore remote_store;
2666         struct sctp_paramhdr param_buf, *phdr;
2667         int ptype;
2668         int zero_address = 0;
2669 #ifdef INET
2670         struct sockaddr_in *sin;
2671 #endif
2672 #ifdef INET6
2673         struct sockaddr_in6 *sin6;
2674 #endif
2675
2676         memset(&remote_store, 0, sizeof(remote_store));
2677         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2678                                    &param_buf, sizeof(struct sctp_paramhdr));
2679         if (phdr == NULL) {
2680                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2681                         __func__);
2682                 return NULL;
2683         }
2684         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2685         /* get the correlation address */
2686         switch (ptype) {
2687 #ifdef INET6
2688         case SCTP_IPV6_ADDRESS:
2689         {
2690                 /* ipv6 address param */
2691                 struct sctp_ipv6addr_param *p6, p6_buf;
2692
2693                 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2694                         return NULL;
2695                 }
2696                 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2697                                                                        offset + sizeof(struct sctp_asconf_chunk),
2698                                                                        &p6_buf.ph, sizeof(p6_buf));
2699                 if (p6 == NULL) {
2700                         SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2701                                 __func__);
2702                         return (NULL);
2703                 }
2704                 sin6 = &remote_store.sin6;
2705                 sin6->sin6_family = AF_INET6;
2706 #ifdef HAVE_SIN6_LEN
2707                 sin6->sin6_len = sizeof(*sin6);
2708 #endif
2709                 sin6->sin6_port = sh->src_port;
2710                 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2711                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2712                         zero_address = 1;
2713                 break;
2714         }
2715 #endif
2716 #ifdef INET
2717         case SCTP_IPV4_ADDRESS:
2718         {
2719                 /* ipv4 address param */
2720                 struct sctp_ipv4addr_param *p4, p4_buf;
2721
2722                 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2723                         return NULL;
2724                 }
2725                 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2726                                                                        offset + sizeof(struct sctp_asconf_chunk),
2727                                                                        &p4_buf.ph, sizeof(p4_buf));
2728                 if (p4 == NULL) {
2729                         SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2730                                 __func__);
2731                         return (NULL);
2732                 }
2733                 sin = &remote_store.sin;
2734                 sin->sin_family = AF_INET;
2735 #ifdef HAVE_SIN_LEN
2736                 sin->sin_len = sizeof(*sin);
2737 #endif
2738                 sin->sin_port = sh->src_port;
2739                 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2740                 if (sin->sin_addr.s_addr == INADDR_ANY)
2741                         zero_address = 1;
2742                 break;
2743         }
2744 #endif
2745         default:
2746                 /* invalid address param type */
2747                 return NULL;
2748         }
2749
2750         if (zero_address) {
2751                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2752                                               netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2753                 if (stcb != NULL) {
2754                         SCTP_INP_DECR_REF(*inp_p);
2755                 }
2756         } else {
2757                 stcb = sctp_findassociation_ep_addr(inp_p,
2758                     &remote_store.sa, netp,
2759                     dst, NULL);
2760         }
2761         return (stcb);
2762 }
2763
2764
2765 /*
2766  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2767  * addresses. This way if we don't get a bind we by default pick a ephemeral
2768  * port with all addresses bound.
2769  */
2770 int
2771 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2772 {
2773         /*
2774          * we get called when a new endpoint starts up. We need to allocate
2775          * the sctp_inpcb structure from the zone and init it. Mark it as
2776          * unbound and find a port that we can use as an ephemeral with
2777          * INADDR_ANY. If the user binds later no problem we can then add in
2778          * the specific addresses. And setup the default parameters for the
2779          * EP.
2780          */
2781         int i, error;
2782         struct sctp_inpcb *inp;
2783         struct sctp_pcb *m;
2784         struct timeval time;
2785         sctp_sharedkey_t *null_key;
2786
2787         error = 0;
2788
2789         SCTP_INP_INFO_WLOCK();
2790         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2791         if (inp == NULL) {
2792                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2793                 SCTP_INP_INFO_WUNLOCK();
2794                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2795                 return (ENOBUFS);
2796         }
2797         /* zap it */
2798         memset(inp, 0, sizeof(*inp));
2799
2800         /* bump generations */
2801 #if defined(__APPLE__) && !defined(__Userspace__)
2802         inp->ip_inp.inp.inp_state = INPCB_STATE_INUSE;
2803 #endif
2804         /* setup socket pointers */
2805         inp->sctp_socket = so;
2806         inp->ip_inp.inp.inp_socket = so;
2807 #if defined(__FreeBSD__) && !defined(__Userspace__)
2808         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2809 #endif
2810 #ifdef INET6
2811 #if !defined(__Userspace__) && !defined(_WIN32)
2812         if (INP_SOCKAF(so) == AF_INET6) {
2813                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2814                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2815                 }
2816                 if (MODULE_GLOBAL(ip6_v6only)) {
2817                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2818                 }
2819         }
2820 #endif
2821 #endif
2822         inp->sctp_associd_counter = 1;
2823         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2824         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2825         inp->max_cwnd = 0;
2826         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2827         inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable);
2828         inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable);
2829         inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable);
2830         inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable);
2831         inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2832         inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2833         inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2834         inp->idata_supported = 0;
2835
2836 #if defined(__FreeBSD__) && !defined(__Userspace__)
2837         inp->fibnum = so->so_fibnum;
2838 #else
2839         inp->fibnum = 0;
2840 #endif
2841 #if defined(__Userspace__)
2842         inp->ulp_info = NULL;
2843         inp->recv_callback = NULL;
2844         inp->send_callback = NULL;
2845         inp->send_sb_threshold = 0;
2846 #endif
2847         /* init the small hash table we use to track asocid <-> tcb */
2848         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2849         if (inp->sctp_asocidhash == NULL) {
2850 #if defined(__FreeBSD__) && !defined(__Userspace__)
2851                 crfree(inp->ip_inp.inp.inp_cred);
2852 #endif
2853                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2854                 SCTP_INP_INFO_WUNLOCK();
2855                 return (ENOBUFS);
2856         }
2857         SCTP_INCR_EP_COUNT();
2858         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2859         SCTP_INP_INFO_WUNLOCK();
2860
2861         so->so_pcb = (caddr_t)inp;
2862
2863         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2864                 /* UDP style socket */
2865                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2866                     SCTP_PCB_FLAGS_UNBOUND);
2867                 /* Be sure it is NON-BLOCKING IO for UDP */
2868                 /* SCTP_SET_SO_NBIO(so); */
2869         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2870                 /* TCP style socket */
2871                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2872                     SCTP_PCB_FLAGS_UNBOUND);
2873                 /* Be sure we have blocking IO by default */
2874                 SOCK_LOCK(so);
2875                 SCTP_CLEAR_SO_NBIO(so);
2876                 SOCK_UNLOCK(so);
2877         } else {
2878                 /*
2879                  * unsupported socket type (RAW, etc)- in case we missed it
2880                  * in protosw
2881                  */
2882                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2883                 so->so_pcb = NULL;
2884 #if defined(__FreeBSD__) && !defined(__Userspace__)
2885                 crfree(inp->ip_inp.inp.inp_cred);
2886 #endif
2887                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2888                 return (EOPNOTSUPP);
2889         }
2890         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2891                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2892                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2893         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2894                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2895                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2896         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2897                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2898                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2899         }
2900         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2901                                            &inp->sctp_hashmark);
2902         if (inp->sctp_tcbhash == NULL) {
2903                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2904                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2905                 so->so_pcb = NULL;
2906 #if defined(__FreeBSD__) && !defined(__Userspace__)
2907                 crfree(inp->ip_inp.inp.inp_cred);
2908 #endif
2909                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2910                 return (ENOBUFS);
2911         }
2912 #ifdef SCTP_MVRF
2913         inp->vrf_size = SCTP_DEFAULT_VRF_SIZE;
2914         SCTP_MALLOC(inp->m_vrf_ids, uint32_t *,
2915                     (sizeof(uint32_t) * inp->vrf_size), SCTP_M_MVRF);
2916         if (inp->m_vrf_ids == NULL) {
2917                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2918                 so->so_pcb = NULL;
2919                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
2920 #if defined(__FreeBSD__) && !defined(__Userspace__)
2921                 crfree(inp->ip_inp.inp.inp_cred);
2922 #endif
2923                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2924                 return (ENOBUFS);
2925         }
2926         inp->m_vrf_ids[0] = vrf_id;
2927         inp->num_vrfs = 1;
2928 #endif
2929         inp->def_vrf_id = vrf_id;
2930
2931 #if defined(__APPLE__) && !defined(__Userspace__)
2932 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
2933         inp->ip_inp.inp.inpcb_mtx = lck_mtx_alloc_init(SCTP_BASE_INFO(sctbinfo).mtx_grp, SCTP_BASE_INFO(sctbinfo).mtx_attr);
2934         if (inp->ip_inp.inp.inpcb_mtx == NULL) {
2935                 SCTP_PRINTF("in_pcballoc: can't alloc mutex! so=%p\n", (void *)so);
2936 #ifdef SCTP_MVRF
2937                 SCTP_FREE(inp->m_vrf_ids, SCTP_M_MVRF);
2938 #endif
2939                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
2940                 so->so_pcb = NULL;
2941                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2942                 SCTP_UNLOCK_EXC(SCTP_BASE_INFO(sctbinfo).ipi_lock);
2943                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
2944                 return (ENOMEM);
2945         }
2946 #elif defined(APPLE_LION) || defined(APPLE_MOUNTAINLION)
2947         lck_mtx_init(&inp->ip_inp.inp.inpcb_mtx, SCTP_BASE_INFO(sctbinfo).mtx_grp, SCTP_BASE_INFO(sctbinfo).mtx_attr);
2948 #else
2949         lck_mtx_init(&inp->ip_inp.inp.inpcb_mtx, SCTP_BASE_INFO(sctbinfo).ipi_lock_grp, SCTP_BASE_INFO(sctbinfo).ipi_lock_attr);
2950 #endif
2951 #endif
2952         SCTP_INP_INFO_WLOCK();
2953         SCTP_INP_LOCK_INIT(inp);
2954 #if defined(__FreeBSD__) && !defined(__Userspace__)
2955         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2956 #endif
2957         SCTP_INP_READ_INIT(inp);
2958         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2959         /* lock the new ep */
2960         SCTP_INP_WLOCK(inp);
2961
2962         /* add it to the info area */
2963         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2964 #if defined(__APPLE__) && !defined(__Userspace__)
2965         inp->ip_inp.inp.inp_pcbinfo = &SCTP_BASE_INFO(sctbinfo);
2966 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) || defined(APPLE_LION) || defined(APPLE_MOUNTAINLION)
2967         LIST_INSERT_HEAD(SCTP_BASE_INFO(sctbinfo).listhead, &inp->ip_inp.inp, inp_list);
2968 #else
2969         LIST_INSERT_HEAD(SCTP_BASE_INFO(sctbinfo).ipi_listhead, &inp->ip_inp.inp, inp_list);
2970 #endif
2971 #endif
2972         SCTP_INP_INFO_WUNLOCK();
2973
2974         TAILQ_INIT(&inp->read_queue);
2975         LIST_INIT(&inp->sctp_addr_list);
2976
2977         LIST_INIT(&inp->sctp_asoc_list);
2978
2979 #ifdef SCTP_TRACK_FREED_ASOCS
2980         /* TEMP CODE */
2981         LIST_INIT(&inp->sctp_asoc_free_list);
2982 #endif
2983         /* Init the timer structure for signature change */
2984         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2985         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2986
2987         /* now init the actual endpoint default data */
2988         m = &inp->sctp_ep;
2989
2990         /* setup the base timeout information */
2991         m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC);      /* needed ? */
2992         m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC);      /* needed ? */
2993         m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2994         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2995         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2996         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2997         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2998         /* all max/min max are in ms */
2999         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
3000         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
3001         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
3002         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
3003         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
3004         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
3005         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
3006         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
3007         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
3008         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
3009         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
3010         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
3011         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
3012
3013         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
3014         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
3015         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
3016         /* number of streams to pre-open on a association */
3017         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
3018
3019         m->default_mtu = 0;
3020         /* Add adaptation cookie */
3021         m->adaptation_layer_indicator = 0;
3022         m->adaptation_layer_indicator_provided = 0;
3023
3024         /* seed random number generator */
3025         m->random_counter = 1;
3026         m->store_at = SCTP_SIGNATURE_SIZE;
3027         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
3028         sctp_fill_random_store(m);
3029
3030         /* Minimum cookie size */
3031         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
3032             sizeof(struct sctp_state_cookie);
3033         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
3034
3035         /* Setup the initial secret */
3036         (void)SCTP_GETTIME_TIMEVAL(&time);
3037         m->time_of_secret_change = time.tv_sec;
3038
3039         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
3040                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
3041         }
3042         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
3043
3044         /* How long is a cookie good for ? */
3045         m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
3046         /*
3047          * Initialize authentication parameters
3048          */
3049         m->local_hmacs = sctp_default_supported_hmaclist();
3050         m->local_auth_chunks = sctp_alloc_chunklist();
3051         if (inp->asconf_supported) {
3052                 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
3053                 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
3054         }
3055         m->default_dscp = 0;
3056 #ifdef INET6
3057         m->default_flowlabel = 0;
3058 #endif
3059         m->port = 0; /* encapsulation disabled by default */
3060         LIST_INIT(&m->shared_keys);
3061         /* add default NULL key as key id 0 */
3062         null_key = sctp_alloc_sharedkey();
3063         sctp_insert_sharedkey(&m->shared_keys, null_key);
3064         SCTP_INP_WUNLOCK(inp);
3065 #ifdef SCTP_LOG_CLOSING
3066         sctp_log_closing(inp, NULL, 12);
3067 #endif
3068         return (error);
3069 }
3070
3071
3072 void
3073 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
3074     struct sctp_tcb *stcb)
3075 {
3076         struct sctp_nets *net;
3077         uint16_t lport, rport;
3078         struct sctppcbhead *head;
3079         struct sctp_laddr *laddr, *oladdr;
3080
3081         atomic_add_int(&stcb->asoc.refcnt, 1);
3082         SCTP_TCB_UNLOCK(stcb);
3083         SCTP_INP_INFO_WLOCK();
3084         SCTP_INP_WLOCK(old_inp);
3085         SCTP_INP_WLOCK(new_inp);
3086         SCTP_TCB_LOCK(stcb);
3087         atomic_subtract_int(&stcb->asoc.refcnt, 1);
3088
3089         new_inp->sctp_ep.time_of_secret_change =
3090             old_inp->sctp_ep.time_of_secret_change;
3091         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
3092             sizeof(old_inp->sctp_ep.secret_key));
3093         new_inp->sctp_ep.current_secret_number =
3094             old_inp->sctp_ep.current_secret_number;
3095         new_inp->sctp_ep.last_secret_number =
3096             old_inp->sctp_ep.last_secret_number;
3097         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
3098
3099         /* make it so new data pours into the new socket */
3100         stcb->sctp_socket = new_inp->sctp_socket;
3101         stcb->sctp_ep = new_inp;
3102
3103         /* Copy the port across */
3104         lport = new_inp->sctp_lport = old_inp->sctp_lport;
3105         rport = stcb->rport;
3106         /* Pull the tcb from the old association */
3107         LIST_REMOVE(stcb, sctp_tcbhash);
3108         LIST_REMOVE(stcb, sctp_tcblist);
3109         if (stcb->asoc.in_asocid_hash) {
3110                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
3111         }
3112         /* Now insert the new_inp into the TCP connected hash */
3113         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
3114
3115         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
3116         /* Its safe to access */
3117         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3118
3119         /* Now move the tcb into the endpoint list */
3120         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
3121         /*
3122          * Question, do we even need to worry about the ep-hash since we
3123          * only have one connection? Probably not :> so lets get rid of it
3124          * and not suck up any kernel memory in that.
3125          */
3126         if (stcb->asoc.in_asocid_hash) {
3127                 struct sctpasochead *lhd;
3128                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
3129                         new_inp->hashasocidmark)];
3130                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
3131         }
3132         /* Ok. Let's restart timer. */
3133         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3134                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
3135                     stcb, net);
3136         }
3137
3138         SCTP_INP_INFO_WUNLOCK();
3139         if (new_inp->sctp_tcbhash != NULL) {
3140                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
3141                 new_inp->sctp_tcbhash = NULL;
3142         }
3143         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
3144                 /* Subset bound, so copy in the laddr list from the old_inp */
3145                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
3146                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
3147                         if (laddr == NULL) {
3148                                 /*
3149                                  * Gak, what can we do? This assoc is really
3150                                  * HOSED. We probably should send an abort
3151                                  * here.
3152                                  */
3153                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
3154                                 continue;
3155                         }
3156                         SCTP_INCR_LADDR_COUNT();
3157                         memset(laddr, 0, sizeof(*laddr));
3158                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
3159                         laddr->ifa = oladdr->ifa;
3160                         atomic_add_int(&laddr->ifa->refcount, 1);
3161                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
3162                             sctp_nxt_addr);
3163                         new_inp->laddr_count++;
3164                         if (oladdr == stcb->asoc.last_used_address) {
3165                                 stcb->asoc.last_used_address = laddr;
3166                         }
3167                 }
3168         }
3169         /* Now any running timers need to be adjusted. */
3170         if (stcb->asoc.dack_timer.ep == old_inp) {
3171                 SCTP_INP_DECR_REF(old_inp);
3172                 stcb->asoc.dack_timer.ep = new_inp;
3173                 SCTP_INP_INCR_REF(new_inp);
3174         }
3175         if (stcb->asoc.asconf_timer.ep == old_inp) {
3176                 SCTP_INP_DECR_REF(old_inp);
3177                 stcb->asoc.asconf_timer.ep = new_inp;
3178                 SCTP_INP_INCR_REF(new_inp);
3179         }
3180         if (stcb->asoc.strreset_timer.ep == old_inp) {
3181                 SCTP_INP_DECR_REF(old_inp);
3182                 stcb->asoc.strreset_timer.ep = new_inp;
3183                 SCTP_INP_INCR_REF(new_inp);
3184         }
3185         if (stcb->asoc.shut_guard_timer.ep == old_inp) {
3186                 SCTP_INP_DECR_REF(old_inp);
3187                 stcb->asoc.shut_guard_timer.ep = new_inp;
3188                 SCTP_INP_INCR_REF(new_inp);
3189         }
3190         if (stcb->asoc.autoclose_timer.ep == old_inp) {
3191                 SCTP_INP_DECR_REF(old_inp);
3192                 stcb->asoc.autoclose_timer.ep = new_inp;
3193                 SCTP_INP_INCR_REF(new_inp);
3194         }
3195         if (stcb->asoc.delete_prim_timer.ep == old_inp) {
3196                 SCTP_INP_DECR_REF(old_inp);
3197                 stcb->asoc.delete_prim_timer.ep = new_inp;
3198                 SCTP_INP_INCR_REF(new_inp);
3199         }
3200         /* now what about the nets? */
3201         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3202                 if (net->pmtu_timer.ep == old_inp) {
3203                         SCTP_INP_DECR_REF(old_inp);
3204                         net->pmtu_timer.ep = new_inp;
3205                         SCTP_INP_INCR_REF(new_inp);
3206                 }
3207                 if (net->hb_timer.ep == old_inp) {
3208                         SCTP_INP_DECR_REF(old_inp);
3209                         net->hb_timer.ep = new_inp;
3210                         SCTP_INP_INCR_REF(new_inp);
3211                 }
3212                 if (net->rxt_timer.ep == old_inp) {
3213                         SCTP_INP_DECR_REF(old_inp);
3214                         net->rxt_timer.ep = new_inp;
3215                         SCTP_INP_INCR_REF(new_inp);
3216                 }
3217         }
3218         SCTP_INP_WUNLOCK(new_inp);
3219         SCTP_INP_WUNLOCK(old_inp);
3220 }
3221
3222 /*
3223  * insert an laddr entry with the given ifa for the desired list
3224  */
3225 static int
3226 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
3227 {
3228         struct sctp_laddr *laddr;
3229
3230         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
3231         if (laddr == NULL) {
3232                 /* out of memory? */
3233                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3234                 return (EINVAL);
3235         }
3236         SCTP_INCR_LADDR_COUNT();
3237         memset(laddr, 0, sizeof(*laddr));
3238         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
3239         laddr->ifa = ifa;
3240         laddr->action = act;
3241         atomic_add_int(&ifa->refcount, 1);
3242         /* insert it */
3243         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
3244
3245         return (0);
3246 }
3247
3248 /*
3249  * Remove an laddr entry from the local address list (on an assoc)
3250  */
3251 static void
3252 sctp_remove_laddr(struct sctp_laddr *laddr)
3253 {
3254
3255         /* remove from the list */
3256         LIST_REMOVE(laddr, sctp_nxt_addr);
3257         sctp_free_ifa(laddr->ifa);
3258         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
3259         SCTP_DECR_LADDR_COUNT();
3260 }
3261
3262 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Userspace__))
3263 /*
3264  * Don't know why, but without this there is an unknown reference when
3265  * compiling NetBSD... hmm
3266  */
3267 extern void in6_sin6_2_sin(struct sockaddr_in *, struct sockaddr_in6 *sin6);
3268 #endif
3269
3270
3271 /* sctp_ifap is used to bypass normal local address validation checks */
3272 int
3273 #if defined(__FreeBSD__) && !defined(__Userspace__)
3274 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
3275                 struct sctp_ifa *sctp_ifap, struct thread *p)
3276 #elif defined(_WIN32) && !defined(__Userspace__)
3277 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
3278                 struct sctp_ifa *sctp_ifap, PKTHREAD p)
3279 #else
3280 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
3281                 struct sctp_ifa *sctp_ifap, struct proc *p)
3282 #endif
3283 {
3284         /* bind a ep to a socket address */
3285         struct sctppcbhead *head;
3286         struct sctp_inpcb *inp, *inp_tmp;
3287 #if (defined(__FreeBSD__) || defined(__APPLE__)) && !defined(__Userspace__)
3288         struct inpcb *ip_inp;
3289 #endif
3290         int port_reuse_active = 0;
3291         int bindall;
3292 #ifdef SCTP_MVRF
3293         int i;
3294 #endif
3295         uint16_t lport;
3296         int error;
3297         uint32_t vrf_id;
3298
3299         lport = 0;
3300         bindall = 1;
3301         inp = (struct sctp_inpcb *)so->so_pcb;
3302 #if (defined(__FreeBSD__) || defined(__APPLE__)) && !defined(__Userspace__)
3303         ip_inp = (struct inpcb *)so->so_pcb;
3304 #endif
3305 #ifdef SCTP_DEBUG
3306         if (addr) {
3307                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
3308                         ntohs(((struct sockaddr_in *)addr)->sin_port));
3309                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
3310                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
3311         }
3312 #endif
3313         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
3314                 /* already did a bind, subsequent binds NOT allowed ! */
3315                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3316                 return (EINVAL);
3317         }
3318 #if defined(__FreeBSD__) && !defined(__Userspace__)
3319 #ifdef INVARIANTS
3320         if (p == NULL)
3321                 panic("null proc/thread");
3322 #endif
3323 #endif
3324         if (addr != NULL) {
3325                 switch (addr->sa_family) {
3326 #ifdef INET
3327                 case AF_INET:
3328                 {
3329                         struct sockaddr_in *sin;
3330
3331                         /* IPV6_V6ONLY socket? */
3332                         if (SCTP_IPV6_V6ONLY(inp)) {
3333                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3334                                 return (EINVAL);
3335                         }
3336 #ifdef HAVE_SA_LEN
3337                         if (addr->sa_len != sizeof(*sin)) {
3338                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3339                                 return (EINVAL);
3340                         }
3341 #endif
3342
3343                         sin = (struct sockaddr_in *)addr;
3344                         lport = sin->sin_port;
3345 #if defined(__FreeBSD__) && !defined(__Userspace__)
3346                         /*
3347                          * For LOOPBACK the prison_local_ip4() call will transmute the ip address
3348                          * to the proper value.
3349                          */
3350                         if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
3351                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3352                                 return (error);
3353                         }
3354 #endif
3355                         if (sin->sin_addr.s_addr != INADDR_ANY) {
3356                                 bindall = 0;
3357                         }
3358                         break;
3359                 }
3360 #endif
3361 #ifdef INET6
3362                 case AF_INET6:
3363                 {
3364                         /* Only for pure IPv6 Address. (No IPv4 Mapped!) */
3365                         struct sockaddr_in6 *sin6;
3366
3367                         sin6 = (struct sockaddr_in6 *)addr;
3368
3369 #ifdef HAVE_SA_LEN
3370                         if (addr->sa_len != sizeof(*sin6)) {
3371                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3372                                 return (EINVAL);
3373                         }
3374 #endif
3375                         lport = sin6->sin6_port;
3376 #if defined(__FreeBSD__) && !defined(__Userspace__)
3377                         /*
3378                          * For LOOPBACK the prison_local_ip6() call will transmute the ipv6 address
3379                          * to the proper value.
3380                          */
3381                         if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
3382                             (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
3383                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3384                                 return (error);
3385                         }
3386 #endif
3387                         if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3388                                 bindall = 0;
3389 #ifdef SCTP_EMBEDDED_V6_SCOPE
3390                                 /* KAME hack: embed scopeid */
3391 #if defined(SCTP_KAME)
3392                                 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
3393                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3394                                         return (EINVAL);
3395                                 }
3396 #elif defined(__APPLE__) && !defined(__Userspace__)
3397 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
3398                                 if (in6_embedscope(&sin6->sin6_addr, sin6, ip_inp, NULL) != 0) {
3399 #else
3400                                 if (in6_embedscope(&sin6->sin6_addr, sin6, ip_inp, NULL, NULL) != 0) {
3401 #endif
3402                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3403                                         return (EINVAL);
3404                                 }
3405 #elif defined(__FreeBSD__) && !defined(__Userspace__)
3406                                 error = scope6_check_id(sin6, MODULE_GLOBAL(ip6_use_defzone));
3407                                 if (error != 0) {
3408                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3409                                         return (error);
3410                                 }
3411 #else
3412                                 if (in6_embedscope(&sin6->sin6_addr, sin6) != 0) {
3413                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3414                                         return (EINVAL);
3415                                 }
3416 #endif
3417 #endif /* SCTP_EMBEDDED_V6_SCOPE */
3418                         }
3419 #ifndef SCOPEDROUTING
3420                         /* this must be cleared for ifa_ifwithaddr() */
3421                         sin6->sin6_scope_id = 0;
3422 #endif /* SCOPEDROUTING */
3423                         break;
3424                 }
3425 #endif
3426 #if defined(__Userspace__)
3427                 case AF_CONN:
3428                 {
3429                         struct sockaddr_conn *sconn;
3430
3431 #ifdef HAVE_SA_LEN
3432                         if (addr->sa_len != sizeof(struct sockaddr_conn)) {
3433                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3434                                 return (EINVAL);
3435                         }
3436 #endif
3437                         sconn = (struct sockaddr_conn *)addr;
3438                         lport = sconn->sconn_port;
3439                         if (sconn->sconn_addr != NULL) {
3440                                 bindall = 0;
3441                         }
3442                         break;
3443                 }
3444 #endif
3445                 default:
3446                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
3447                         return (EAFNOSUPPORT);
3448                 }
3449         }
3450         SCTP_INP_INFO_WLOCK();
3451         SCTP_INP_WLOCK(inp);
3452         /* Setup a vrf_id to be the default for the non-bind-all case. */
3453         vrf_id = inp->def_vrf_id;
3454
3455         /* increase our count due to the unlock we do */
3456         SCTP_INP_INCR_REF(inp);
3457         if (lport) {
3458                 /*
3459                  * Did the caller specify a port? if so we must see if an ep
3460                  * already has this one bound.
3461                  */
3462                 /* got to be root to get at low ports */
3463 #if !(defined(_WIN32) && !defined(__Userspace__))
3464                 if (ntohs(lport) < IPPORT_RESERVED) {
3465                         if ((p != NULL) && ((error =
3466 #if defined(__FreeBSD__) && !defined(__Userspace__)
3467                                   priv_check(p, PRIV_NETINET_RESERVEDPORT)
3468 #elif defined(__APPLE__) && !defined(__Userspace__)
3469                                   suser(p->p_ucred, &p->p_acflag)
3470 #elif defined(__Userspace__) /* must be true to use raw socket */
3471                                   1
3472 #else
3473                                   suser(p, 0)
3474 #endif
3475                                     ) != 0)) {
3476                                 SCTP_INP_DECR_REF(inp);
3477                                 SCTP_INP_WUNLOCK(inp);
3478                                 SCTP_INP_INFO_WUNLOCK();
3479                                 return (error);
3480                         }
3481                 }
3482 #endif
3483                 SCTP_INP_WUNLOCK(inp);
3484                 if (bindall) {
3485 #ifdef SCTP_MVRF
3486                         for (i = 0; i < inp->num_vrfs; i++) {
3487                                 vrf_id = inp->m_vrf_ids[i];
3488 #else
3489                                 vrf_id = inp->def_vrf_id;
3490 #endif
3491                                 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
3492                                 if (inp_tmp != NULL) {
3493                                         /*
3494                                          * lock guy returned and lower count
3495                                          * note that we are not bound so
3496                                          * inp_tmp should NEVER be inp. And
3497                                          * it is this inp (inp_tmp) that gets
3498                                          * the reference bump, so we must
3499                                          * lower it.
3500                                          */
3501                                         SCTP_INP_DECR_REF(inp_tmp);
3502                                         /* unlock info */
3503                                         if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3504                                             (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3505                                                 /* Ok, must be one-2-one and allowing port re-use */
3506                                                 port_reuse_active = 1;
3507                                                 goto continue_anyway;
3508                                         }
3509                                         SCTP_INP_DECR_REF(inp);
3510                                         SCTP_INP_INFO_WUNLOCK();
3511                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3512                                         return (EADDRINUSE);
3513                                 }
3514 #ifdef SCTP_MVRF
3515                         }
3516 #endif
3517                 } else {
3518                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
3519                         if (inp_tmp != NULL) {
3520                                 /*
3521                                  * lock guy returned and lower count note
3522                                  * that we are not bound so inp_tmp should
3523                                  * NEVER be inp. And it is this inp (inp_tmp)
3524                                  * that gets the reference bump, so we must
3525                                  * lower it.
3526                                  */
3527                                 SCTP_INP_DECR_REF(inp_tmp);
3528                                 /* unlock info */
3529                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3530                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3531                                         /* Ok, must be one-2-one and allowing port re-use */
3532                                         port_reuse_active = 1;
3533                                         goto continue_anyway;
3534                                 }
3535                                 SCTP_INP_DECR_REF(inp);
3536                                 SCTP_INP_INFO_WUNLOCK();
3537                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3538                                 return (EADDRINUSE);
3539                         }
3540                 }
3541         continue_anyway:
3542                 SCTP_INP_WLOCK(inp);
3543                 if (bindall) {
3544                         /* verify that no lport is not used by a singleton */
3545                         if ((port_reuse_active == 0) &&
3546                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
3547                                 /* Sorry someone already has this one bound */
3548                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3549                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3550                                         port_reuse_active = 1;
3551                                 } else {
3552                                         SCTP_INP_DECR_REF(inp);
3553                                         SCTP_INP_WUNLOCK(inp);
3554                                         SCTP_INP_INFO_WUNLOCK();
3555                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3556                                         return (EADDRINUSE);
3557                                 }
3558                         }
3559                 }
3560         } else {
3561                 uint16_t first, last, candidate;
3562                 uint16_t count;
3563                 int done;
3564
3565 #if defined(_WIN32) && !defined(__Userspace__)
3566                 first = 1;
3567                 last = 0xffff;
3568 #else
3569 #if defined(__Userspace__)
3570                 /* TODO ensure uid is 0, etc... */
3571 #elif (defined(__FreeBSD__) || defined(__APPLE__)) && !defined(__Userspace__)
3572                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3573                         first = MODULE_GLOBAL(ipport_hifirstauto);
3574                         last = MODULE_GLOBAL(ipport_hilastauto);
3575                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3576                         if (p && (error =
3577 #if defined(__FreeBSD__)
3578                                   priv_check(p, PRIV_NETINET_RESERVEDPORT)
3579 #elif defined(__APPLE__)
3580                                   suser(p->p_ucred, &p->p_acflag)
3581 #else
3582                                   suser(p, 0)
3583 #endif
3584                                     )) {
3585                                 SCTP_INP_DECR_REF(inp);
3586                                 SCTP_INP_WUNLOCK(inp);
3587                                 SCTP_INP_INFO_WUNLOCK();
3588                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3589                                 return (error);
3590                         }
3591                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3592                         last = MODULE_GLOBAL(ipport_lowlastauto);
3593                 } else {
3594 #endif
3595                         first = MODULE_GLOBAL(ipport_firstauto);
3596                         last = MODULE_GLOBAL(ipport_lastauto);
3597 #if (defined(__FreeBSD__) || defined(__APPLE__)) && !defined(__Userspace__)
3598                 }
3599 #endif
3600 #endif
3601                 if (first > last) {
3602                         uint16_t temp;
3603
3604                         temp = first;
3605                         first = last;
3606                         last = temp;
3607                 }
3608                 count = last - first + 1; /* number of candidates */
3609                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3610
3611                 done = 0;
3612                 while (!done) {
3613 #ifdef SCTP_MVRF
3614                         for (i = 0; i < inp->num_vrfs; i++) {
3615                                 if (sctp_isport_inuse(inp, htons(candidate), inp->m_vrf_ids[i]) != NULL) {
3616                                         break;
3617                                 }
3618                         }
3619                         if (i == inp->num_vrfs) {
3620                                 done = 1;
3621                         }
3622 #else
3623                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3624                                 done = 1;
3625                         }
3626 #endif
3627                         if (!done) {
3628                                 if (--count == 0) {
3629                                         SCTP_INP_DECR_REF(inp);
3630                                         SCTP_INP_WUNLOCK(inp);
3631                                         SCTP_INP_INFO_WUNLOCK();
3632                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3633                                         return (EADDRINUSE);
3634                                 }
3635                                 if (candidate == last)
3636                                         candidate = first;
3637                                 else
3638                                         candidate = candidate + 1;
3639                         }
3640                 }
3641                 lport = htons(candidate);
3642         }
3643         SCTP_INP_DECR_REF(inp);
3644         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3645                                SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3646                 /*
3647                  * this really should not happen. The guy did a non-blocking
3648                  * bind and then did a close at the same time.
3649                  */
3650                 SCTP_INP_WUNLOCK(inp);
3651                 SCTP_INP_INFO_WUNLOCK();
3652                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3653                 return (EINVAL);
3654         }
3655         /* ok we look clear to give out this port, so lets setup the binding */
3656         if (bindall) {
3657                 /* binding to all addresses, so just set in the proper flags */
3658                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3659                 /* set the automatic addr changes from kernel flag */
3660                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3661                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3662                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3663                 } else {
3664                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3665                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3666                 }
3667                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3668                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3669                 } else {
3670                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3671                 }
3672                 /* set the automatic mobility_base from kernel
3673                    flag (by micchie)
3674                 */
3675                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3676                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3677                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3678                 } else {
3679                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3680                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3681                 }
3682                 /* set the automatic mobility_fasthandoff from kernel
3683                    flag (by micchie)
3684                 */
3685                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3686                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3687                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3688                 } else {
3689                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3690                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3691                 }
3692         } else {
3693                 /*
3694                  * bind specific, make sure flags is off and add a new
3695                  * address structure to the sctp_addr_list inside the ep
3696                  * structure.
3697                  *
3698                  * We will need to allocate one and insert it at the head. The
3699                  * socketopt call can just insert new addresses in there as
3700                  * well. It will also have to do the embed scope kame hack
3701                  * too (before adding).
3702                  */
3703                 struct sctp_ifa *ifa;
3704                 union sctp_sockstore store;
3705
3706                 memset(&store, 0, sizeof(store));
3707                 switch (addr->sa_family) {
3708 #ifdef INET
3709                 case AF_INET:
3710                         memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3711                         store.sin.sin_port = 0;
3712                         break;
3713 #endif
3714 #ifdef INET6
3715                 case AF_INET6:
3716                         memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3717                         store.sin6.sin6_port = 0;
3718                         break;
3719 #endif
3720 #if defined(__Userspace__)
3721                 case AF_CONN:
3722                         memcpy(&store.sconn, addr, sizeof(struct sockaddr_conn));
3723                         store.sconn.sconn_port = 0;
3724                         break;
3725 #endif
3726                 default:
3727                         break;
3728                 }
3729                 /*
3730                  * first find the interface with the bound address need to
3731                  * zero out the port to find the address! yuck! can't do
3732                  * this earlier since need port for sctp_pcb_findep()
3733                  */
3734                 if (sctp_ifap != NULL) {
3735                         ifa = sctp_ifap;
3736                 } else {
3737                         /* Note for BSD we hit here always other
3738                          * O/S's will pass things in via the
3739                          * sctp_ifap argument.
3740                          */
3741                         ifa = sctp_find_ifa_by_addr(&store.sa,
3742                                                     vrf_id, SCTP_ADDR_NOT_LOCKED);
3743                 }
3744                 if (ifa == NULL) {
3745                         /* Can't find an interface with that address */
3746                         SCTP_INP_WUNLOCK(inp);
3747                         SCTP_INP_INFO_WUNLOCK();
3748                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3749                         return (EADDRNOTAVAIL);
3750                 }
3751 #ifdef INET6
3752                 if (addr->sa_family == AF_INET6) {
3753                         /* GAK, more FIXME IFA lock? */
3754                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3755                                 /* Can't bind a non-existent addr. */
3756                                 SCTP_INP_WUNLOCK(inp);
3757                                 SCTP_INP_INFO_WUNLOCK();
3758                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3759                                 return (EINVAL);
3760                         }
3761                 }
3762 #endif
3763                 /* we're not bound all */
3764                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3765                 /* allow bindx() to send ASCONF's for binding changes */
3766                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3767                 /* clear automatic addr changes from kernel flag */
3768                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3769
3770                 /* add this address to the endpoint list */
3771                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3772                 if (error != 0) {
3773                         SCTP_INP_WUNLOCK(inp);
3774                         SCTP_INP_INFO_WUNLOCK();
3775                         return (error);
3776                 }
3777                 inp->laddr_count++;
3778         }
3779         /* find the bucket */
3780         if (port_reuse_active) {
3781                 /* Put it into tcp 1-2-1 hash */
3782                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3783                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3784         } else {
3785                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3786         }
3787         /* put it in the bucket */
3788         LIST_INSERT_HEAD(head, inp, sctp_hash);
3789         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3790                 (void *)head, ntohs(lport), port_reuse_active);
3791         /* set in the port */
3792         inp->sctp_lport = lport;
3793
3794         /* turn off just the unbound flag */
3795         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3796         SCTP_INP_WUNLOCK(inp);
3797         SCTP_INP_INFO_WUNLOCK();
3798         return (0);
3799 }
3800
3801
3802 static void
3803 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3804 {
3805         struct sctp_iterator *it, *nit;
3806
3807         /*
3808          * We enter with the only the ITERATOR_LOCK in place and a write
3809          * lock on the inp_info stuff.
3810          */
3811         it = sctp_it_ctl.cur_it;
3812 #if defined(__FreeBSD__) && !defined(__Userspace__)
3813         if (it && (it->vn != curvnet)) {
3814                 /* Its not looking at our VNET */
3815                 return;
3816         }
3817 #endif
3818         if (it && (it->inp == inp)) {
3819                 /*
3820                  * This is tricky and we hold the iterator lock,
3821                  * but when it returns and gets the lock (when we
3822                  * release it) the iterator will try to operate on
3823                  * inp. We need to stop that from happening. But
3824                  * of course the iterator has a reference on the
3825                  * stcb and inp. We can mark it and it will stop.
3826                  *
3827                  * If its a single iterator situation, we
3828                  * set the end iterator flag. Otherwise
3829                  * we set the iterator to go to the next inp.
3830                  *
3831                  */
3832                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3833                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3834                 } else {
3835                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3836                 }
3837         }
3838         /* Now go through and remove any single reference to
3839          * our inp that may be still pending on the list
3840          */
3841         SCTP_IPI_ITERATOR_WQ_LOCK();
3842         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3843 #if defined(__FreeBSD__) && !defined(__Userspace__)
3844                 if (it->vn != curvnet) {
3845                         continue;
3846                 }
3847 #endif
3848                 if (it->inp == inp) {
3849                         /* This one points to me is it inp specific? */
3850                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3851                                 /* Remove and free this one */
3852                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3853                                     it, sctp_nxt_itr);
3854                                 if (it->function_atend != NULL) {
3855                                         (*it->function_atend) (it->pointer, it->val);
3856                                 }
3857                                 SCTP_FREE(it, SCTP_M_ITER);
3858                         } else {
3859                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3860                                 if (it->inp) {
3861                                         SCTP_INP_INCR_REF(it->inp);
3862                                 }
3863                         }
3864                         /* When its put in the refcnt is incremented so decr it */
3865                         SCTP_INP_DECR_REF(inp);
3866                 }
3867         }
3868         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3869 }
3870
3871 /* release sctp_inpcb unbind the port */
3872 void
3873 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3874 {
3875         /*
3876          * Here we free a endpoint. We must find it (if it is in the Hash
3877          * table) and remove it from there. Then we must also find it in the
3878          * overall list and remove it from there. After all removals are
3879          * complete then any timer has to be stopped. Then start the actual
3880          * freeing. a) Any local lists. b) Any associations. c) The hash of
3881          * all associations. d) finally the ep itself.
3882          */
3883         struct sctp_tcb *asoc, *nasoc;
3884         struct sctp_laddr *laddr, *nladdr;
3885         struct inpcb *ip_pcb;
3886         struct socket *so;
3887         int being_refed = 0;
3888         struct sctp_queued_to_read *sq, *nsq;
3889 #if !defined(__Userspace__)
3890 #if !defined(__FreeBSD__)
3891         sctp_rtentry_t *rt;
3892 #endif
3893 #endif
3894         int cnt;
3895         sctp_sharedkey_t *shared_key, *nshared_key;
3896
3897
3898 #if defined(__APPLE__) && !defined(__Userspace__)
3899         sctp_lock_assert(SCTP_INP_SO(inp));
3900 #endif
3901 #ifdef SCTP_LOG_CLOSING
3902         sctp_log_closing(inp, NULL, 0);
3903 #endif
3904         SCTP_ITERATOR_LOCK();
3905         /* mark any iterators on the list or being processed */
3906         sctp_iterator_inp_being_freed(inp);
3907         SCTP_ITERATOR_UNLOCK();
3908         so = inp->sctp_socket;
3909         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3910                 /* been here before.. eeks.. get out of here */
3911                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3912 #ifdef SCTP_LOG_CLOSING
3913                 sctp_log_closing(inp, NULL, 1);
3914 #endif
3915                 return;
3916         }
3917         SCTP_ASOC_CREATE_LOCK(inp);
3918         SCTP_INP_INFO_WLOCK();
3919
3920         SCTP_INP_WLOCK(inp);
3921         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3922                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3923                 /* socket is gone, so no more wakeups allowed */
3924                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3925                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3926                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3927
3928         }
3929         /* First time through we have the socket lock, after that no more. */
3930         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3931                         SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3932
3933         if (inp->control) {
3934                 sctp_m_freem(inp->control);
3935                 inp->control = NULL;
3936         }
3937         if (inp->pkt) {
3938                 sctp_m_freem(inp->pkt);
3939                 inp->pkt = NULL;
3940         }
3941         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3942                                          * here but I will be nice :> (i.e.
3943                                          * ip_pcb = ep;) */
3944         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3945                 int cnt_in_sd;
3946
3947                 cnt_in_sd = 0;
3948                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3949                         SCTP_TCB_LOCK(asoc);
3950                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3951                                 /* Skip guys being freed */
3952                                 cnt_in_sd++;
3953                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3954                                         /*
3955                                          * Special case - we did not start a kill
3956                                          * timer on the asoc due to it was not
3957                                          * closed. So go ahead and start it now.
3958                                          */
3959                                         SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3960                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3961                                 }
3962                                 SCTP_TCB_UNLOCK(asoc);
3963                                 continue;
3964                         }
3965                         if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
3966                              (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3967                             (asoc->asoc.total_output_queue_size == 0)) {
3968                                 /* If we have data in queue, we don't want to just
3969                                  * free since the app may have done, send()/close
3970                                  * or connect/send/close. And it wants the data
3971                                  * to get across first.
3972                                  */
3973                                 /* Just abandon things in the front states */
3974                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3975                                                    SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3976                                         cnt_in_sd++;
3977                                 }
3978                                 continue;
3979                         }
3980                         /* Disconnect the socket please */
3981                         asoc->sctp_socket = NULL;
3982                         SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET);
3983                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3984                             (asoc->asoc.control_pdapi) ||
3985                             (asoc->asoc.size_on_all_streams > 0) ||
3986                             (so && (so->so_rcv.sb_cc > 0))) {
3987                                 /* Left with Data unread */
3988                                 struct mbuf *op_err;
3989
3990                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3991                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3992                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3993                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3994                                 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3995                                     (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3996                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3997                                 }
3998                                 if (sctp_free_assoc(inp, asoc,
3999                                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
4000                                         cnt_in_sd++;
4001                                 }
4002                                 continue;
4003                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
4004                                    TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
4005                                    (asoc->asoc.stream_queue_cnt == 0)) {
4006                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete)(asoc, &asoc->asoc)) {
4007                                         goto abort_anyway;
4008                                 }
4009                                 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
4010                                     (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
4011                                         struct sctp_nets *netp;
4012
4013                                         /*
4014                                          * there is nothing queued to send,
4015                                          * so I send shutdown
4016                                          */
4017                                         if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
4018                                             (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
4019                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
4020                                         }
4021                                         SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
4022                                         sctp_stop_timers_for_shutdown(asoc);
4023                                         if (asoc->asoc.alternate) {
4024                                                 netp = asoc->asoc.alternate;
4025                                         } else {
4026                                                 netp = asoc->asoc.primary_destination;
4027                                         }
4028                                         sctp_send_shutdown(asoc, netp);
4029                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
4030                                             netp);
4031                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
4032                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
4033                                 }
4034                         } else {
4035                                 /* mark into shutdown pending */
4036                                 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
4037                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
4038                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete)(asoc, &asoc->asoc)) {
4039                                         SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT);
4040                                 }
4041                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
4042                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
4043                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
4044                                         struct mbuf *op_err;
4045                                 abort_anyway:
4046                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
4047                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
4048                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
4049                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
4050                                         if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
4051                                             (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
4052                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
4053                                         }
4054                                         if (sctp_free_assoc(inp, asoc,
4055                                                             SCTP_PCBFREE_NOFORCE,
4056                                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
4057                                                 cnt_in_sd++;
4058                                         }
4059                                         continue;
4060                                 } else {
4061                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
4062                                 }
4063                         }
4064                         cnt_in_sd++;
4065                         SCTP_TCB_UNLOCK(asoc);
4066                 }
4067                 /* now is there some left in our SHUTDOWN state? */
4068                 if (cnt_in_sd) {
4069 #ifdef SCTP_LOG_CLOSING
4070                         sctp_log_closing(inp, NULL, 2);
4071 #endif
4072                         inp->sctp_socket = NULL;
4073                         SCTP_INP_WUNLOCK(inp);
4074                         SCTP_ASOC_CREATE_UNLOCK(inp);
4075                         SCTP_INP_INFO_WUNLOCK();
4076                         return;
4077                 }
4078         }
4079         inp->sctp_socket = NULL;
4080         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
4081             SCTP_PCB_FLAGS_UNBOUND) {
4082                 /*
4083                  * ok, this guy has been bound. It's port is
4084                  * somewhere in the SCTP_BASE_INFO(hash table). Remove
4085                  * it!
4086                  */
4087                 LIST_REMOVE(inp, sctp_hash);
4088                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
4089         }
4090
4091         /* If there is a timer running to kill us,
4092          * forget it, since it may have a contest
4093          * on the INP lock.. which would cause us
4094          * to die ...
4095          */
4096         cnt = 0;
4097         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
4098                 SCTP_TCB_LOCK(asoc);
4099                 if (immediate != SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
4100                         /* Disconnect the socket please */
4101                         asoc->sctp_socket = NULL;
4102                         SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET);
4103                 }
4104                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
4105                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
4106                                 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
4107                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
4108                         }
4109                         cnt++;
4110                         SCTP_TCB_UNLOCK(asoc);
4111                         continue;
4112                 }
4113                 /* Free associations that are NOT killing us */
4114                 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
4115                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
4116                         struct mbuf *op_err;
4117
4118                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
4119                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
4120                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
4121                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
4122                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
4123                         cnt++;
4124                         SCTP_TCB_UNLOCK(asoc);
4125                         continue;
4126                 }
4127                 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
4128                     (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
4129                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
4130                 }
4131                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
4132                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
4133                         cnt++;
4134                 }
4135         }
4136         if (cnt) {
4137                 /* Ok we have someone out there that will kill us */
4138 #ifdef SCTP_LOG_CLOSING
4139                 sctp_log_closing(inp, NULL, 3);
4140 #endif
4141                 SCTP_INP_WUNLOCK(inp);
4142                 SCTP_ASOC_CREATE_UNLOCK(inp);
4143                 SCTP_INP_INFO_WUNLOCK();
4144                 return;
4145         }
4146         if (SCTP_INP_LOCK_CONTENDED(inp))
4147                 being_refed++;
4148         if (SCTP_INP_READ_CONTENDED(inp))
4149                 being_refed++;
4150         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
4151                 being_refed++;
4152         /* NOTE: 0 refcount also means no timers are referencing us. */
4153         if ((inp->refcount) ||
4154             (being_refed) ||
4155             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
4156 #ifdef SCTP_LOG_CLOSING
4157                 sctp_log_closing(inp, NULL, 4);
4158 #endif
4159                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
4160                 SCTP_INP_WUNLOCK(inp);
4161                 SCTP_ASOC_CREATE_UNLOCK(inp);
4162                 SCTP_INP_INFO_WUNLOCK();
4163                 return;
4164         }
4165         inp->sctp_ep.signature_change.type = 0;
4166         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
4167         /* Remove it from the list .. last thing we need a
4168          * lock for.
4169          */
4170         LIST_REMOVE(inp, sctp_list);
4171         SCTP_INP_WUNLOCK(inp);
4172         SCTP_ASOC_CREATE_UNLOCK(inp);
4173         SCTP_INP_INFO_WUNLOCK();
4174
4175 #ifdef SCTP_LOG_CLOSING
4176         sctp_log_closing(inp, NULL, 5);
4177 #endif
4178
4179 #if !(defined(_WIN32) || defined(__Userspace__))
4180 #if !(defined(__FreeBSD__)  && !defined(__Userspace__))
4181         rt = ip_pcb->inp_route.ro_rt;
4182 #endif
4183 #endif
4184
4185         if ((inp->sctp_asocidhash) != NULL) {
4186                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
4187                 inp->sctp_asocidhash = NULL;
4188         }
4189         /*sa_ignore FREED_MEMORY*/
4190         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
4191                 /* Its only abandoned if it had data left */
4192                 if (sq->length)
4193                         SCTP_STAT_INCR(sctps_left_abandon);
4194
4195                 TAILQ_REMOVE(&inp->read_queue, sq, next);
4196                 sctp_free_remote_addr(sq->whoFrom);
4197                 if (so)
4198                         so->so_rcv.sb_cc -= sq->length;
4199                 if (sq->data) {
4200                         sctp_m_freem(sq->data);
4201                         sq->data = NULL;
4202                 }
4203                 /*
4204                  * no need to free the net count, since at this point all
4205                  * assoc's are gone.
4206                  */
4207                 sctp_free_a_readq(NULL, sq);
4208         }
4209         /* Now the sctp_pcb things */
4210         /*
4211          * free each asoc if it is not already closed/free. we can't use the
4212          * macro here since le_next will get freed as part of the
4213          * sctp_free_assoc() call.
4214          */
4215         if (ip_pcb->inp_options) {
4216                 (void)sctp_m_free(ip_pcb->inp_options);
4217                 ip_pcb->inp_options = 0;
4218         }
4219
4220 #if !(defined(_WIN32) || defined(__Userspace__))
4221 #if !defined(__FreeBSD__)
4222         if (rt) {
4223                 RTFREE(rt);
4224                 ip_pcb->inp_route.ro_rt = 0;
4225         }
4226 #endif
4227 #endif
4228
4229 #ifdef INET6
4230 #if !(defined(_WIN32) || defined(__Userspace__))
4231 #if (defined(__FreeBSD__) || defined(__APPLE__) && !defined(__Userspace__))
4232         if (ip_pcb->inp_vflag & INP_IPV6) {
4233 #else
4234         if (inp->inp_vflag & INP_IPV6) {
4235 #endif
4236                 ip6_freepcbopts(ip_pcb->in6p_outputopts);
4237         }
4238 #endif
4239 #endif                          /* INET6 */
4240         ip_pcb->inp_vflag = 0;
4241         /* free up authentication fields */
4242         if (inp->sctp_ep.local_auth_chunks != NULL)
4243                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
4244         if (inp->sctp_ep.local_hmacs != NULL)
4245                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
4246
4247         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
4248                 LIST_REMOVE(shared_key, next);
4249                 sctp_free_sharedkey(shared_key);
4250                 /*sa_ignore FREED_MEMORY*/
4251         }
4252
4253 #if defined(__APPLE__) && !defined(__Userspace__)
4254         inp->ip_inp.inp.inp_state = INPCB_STATE_DEAD;
4255         if (in_pcb_checkstate(&inp->ip_inp.inp, WNT_STOPUSING, 1) != WNT_STOPUSING) {
4256 #ifdef INVARIANTS
4257                 panic("sctp_inpcb_free inp = %p couldn't set to STOPUSING\n", (void *)inp);
4258 #else
4259                 SCTP_PRINTF("sctp_inpcb_free inp = %p couldn't set to STOPUSING\n", (void *)inp);
4260 #endif
4261         }
4262         inp->ip_inp.inp.inp_socket->so_flags |= SOF_PCBCLEARING;
4263 #endif
4264         /*
4265          * if we have an address list the following will free the list of
4266          * ifaddr's that are set into this ep. Again macro limitations here,
4267          * since the LIST_FOREACH could be a bad idea.
4268          */
4269         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
4270                 sctp_remove_laddr(laddr);
4271         }
4272
4273 #ifdef SCTP_TRACK_FREED_ASOCS
4274         /* TEMP CODE */
4275         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
4276                 LIST_REMOVE(asoc, sctp_tcblist);
4277                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
4278                 SCTP_DECR_ASOC_COUNT();
4279         }
4280         /* *** END TEMP CODE ****/
4281 #endif
4282 #ifdef SCTP_MVRF
4283         SCTP_FREE(inp->m_vrf_ids, SCTP_M_MVRF);
4284 #endif
4285         /* Now lets see about freeing the EP hash table. */
4286         if (inp->sctp_tcbhash != NULL) {
4287                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
4288                 inp->sctp_tcbhash = NULL;
4289         }
4290         /* Now we must put the ep memory back into the zone pool */
4291 #if defined(__FreeBSD__) && !defined(__Userspace__)
4292         crfree(inp->ip_inp.inp.inp_cred);
4293         INP_LOCK_DESTROY(&inp->ip_inp.inp);
4294 #endif
4295         SCTP_INP_LOCK_DESTROY(inp);
4296         SCTP_INP_READ_DESTROY(inp);
4297         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
4298 #if !(defined(__APPLE__) && !defined(__Userspace__))
4299         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
4300         SCTP_DECR_EP_COUNT();
4301 #else
4302         /* For Tiger, we will do this later... */
4303 #endif
4304 }
4305
4306
4307 struct sctp_nets *
4308 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
4309 {
4310         struct sctp_nets *net;
4311         /* locate the address */
4312         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4313                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
4314                         return (net);
4315         }
4316         return (NULL);
4317 }
4318
4319
4320 int
4321 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
4322 {
4323         struct sctp_ifa *sctp_ifa;
4324         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
4325         if (sctp_ifa) {
4326                 return (1);
4327         } else {
4328                 return (0);
4329         }
4330 }
4331
4332 /*
4333  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
4334  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
4335  * stats of stuff.
4336  */
4337 int
4338 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
4339     struct sctp_nets **netp, uint16_t port, int set_scope, int from)
4340 {
4341         /*
4342          * The following is redundant to the same lines in the
4343          * sctp_aloc_assoc() but is needed since others call the add
4344          * address function
4345          */
4346         struct sctp_nets *net, *netfirst;
4347         int addr_inscope;
4348
4349         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
4350                 from);
4351         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
4352
4353         netfirst = sctp_findnet(stcb, newaddr);
4354         if (netfirst) {
4355                 /*
4356                  * Lie and return ok, we don't want to make the association
4357                  * go away for this behavior. It will happen in the TCP
4358                  * model in a connected socket. It does not reach the hash
4359                  * table until after the association is built so it can't be
4360                  * found. Mark as reachable, since the initial creation will
4361                  * have been cleared and the NOT_IN_ASSOC flag will have
4362                  * been added... and we don't want to end up removing it
4363                  * back out.
4364                  */
4365                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
4366                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
4367                             SCTP_ADDR_UNCONFIRMED);
4368                 } else {
4369                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
4370                 }
4371
4372                 return (0);
4373         }
4374         addr_inscope = 1;
4375         switch (newaddr->sa_family) {
4376 #ifdef INET
4377         case AF_INET:
4378         {
4379                 struct sockaddr_in *sin;
4380
4381                 sin = (struct sockaddr_in *)newaddr;
4382                 if (sin->sin_addr.s_addr == 0) {
4383                         /* Invalid address */
4384                         return (-1);
4385                 }
4386                 /* zero out the zero area */
4387                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
4388
4389                 /* assure len is set */
4390 #ifdef HAVE_SIN_LEN
4391                 sin->sin_len = sizeof(struct sockaddr_in);
4392 #endif
4393                 if (set_scope) {
4394                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
4395                                 stcb->asoc.scope.ipv4_local_scope = 1;
4396                         }
4397                 } else {
4398                         /* Validate the address is in scope */
4399                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
4400                             (stcb->asoc.scope.ipv4_local_scope == 0)) {
4401                                 addr_inscope = 0;
4402                         }
4403                 }
4404                 break;
4405         }
4406 #endif
4407 #ifdef INET6
4408         case AF_INET6:
4409         {
4410                 struct sockaddr_in6 *sin6;
4411
4412                 sin6 = (struct sockaddr_in6 *)newaddr;
4413                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
4414                         /* Invalid address */
4415                         return (-1);
4416                 }
4417                 /* assure len is set */
4418 #ifdef HAVE_SIN6_LEN
4419                 sin6->sin6_len = sizeof(struct sockaddr_in6);
4420 #endif
4421                 if (set_scope) {
4422                         if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
4423                                 stcb->asoc.scope.loopback_scope = 1;
4424                                 stcb->asoc.scope.local_scope = 0;
4425                                 stcb->asoc.scope.ipv4_local_scope = 1;
4426                                 stcb->asoc.scope.site_scope = 1;
4427                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
4428                                 /*
4429                                  * If the new destination is a LINK_LOCAL we
4430                                  * must have common site scope. Don't set
4431                                  * the local scope since we may not share
4432                                  * all links, only loopback can do this.
4433                                  * Links on the local network would also be
4434                                  * on our private network for v4 too.
4435                                  */
4436                                 stcb->asoc.scope.ipv4_local_scope = 1;
4437                                 stcb->asoc.scope.site_scope = 1;
4438                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
4439                                 /*
4440                                  * If the new destination is SITE_LOCAL then
4441                                  * we must have site scope in common.
4442                                  */
4443                                 stcb->asoc.scope.site_scope = 1;
4444                         }
4445                 } else {
4446                         /* Validate the address is in scope */
4447                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
4448                             (stcb->asoc.scope.loopback_scope == 0)) {
4449                                 addr_inscope = 0;
4450                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
4451                             (stcb->asoc.scope.local_scope == 0)) {
4452                                 addr_inscope = 0;
4453                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
4454                             (stcb->asoc.scope.site_scope == 0)) {
4455                                 addr_inscope = 0;
4456                         }
4457                 }
4458                 break;
4459         }
4460 #endif
4461 #if defined(__Userspace__)
4462         case AF_CONN:
4463         {
4464                 struct sockaddr_conn *sconn;
4465
4466                 sconn = (struct sockaddr_conn *)newaddr;
4467                 if (sconn->sconn_addr == NULL) {
4468                         /* Invalid address */
4469                         return (-1);
4470                 }
4471 #ifdef HAVE_SCONN_LEN
4472                 sconn->sconn_len = sizeof(struct sockaddr_conn);
4473 #endif
4474                 break;
4475         }
4476 #endif
4477         default:
4478                 /* not supported family type */
4479                 return (-1);
4480         }
4481         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
4482         if (net == NULL) {
4483                 return (-1);
4484         }
4485         SCTP_INCR_RADDR_COUNT();
4486         memset(net, 0, sizeof(struct sctp_nets));
4487         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
4488 #ifdef HAVE_SA_LEN
4489         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
4490 #endif
4491         switch (newaddr->sa_family) {
4492 #ifdef INET
4493         case AF_INET:
4494 #ifndef HAVE_SA_LEN
4495                 memcpy(&net->ro._l_addr, newaddr, sizeof(struct sockaddr_in));
4496 #endif
4497                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
4498                 break;
4499 #endif
4500 #ifdef INET6
4501         case AF_INET6:
4502 #ifndef HAVE_SA_LEN
4503                 memcpy(&net->ro._l_addr, newaddr, sizeof(struct sockaddr_in6));
4504 #endif
4505                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
4506                 break;
4507 #endif
4508 #if defined(__Userspace__)
4509         case AF_CONN:
4510 #ifndef HAVE_SA_LEN
4511                 memcpy(&net->ro._l_addr, newaddr, sizeof(struct sockaddr_conn));
4512 #endif
4513                 ((struct sockaddr_conn *)&net->ro._l_addr)->sconn_port = stcb->rport;
4514                 break;
4515 #endif
4516         default:
4517                 break;
4518         }
4519         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
4520         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
4521                 stcb->asoc.scope.loopback_scope = 1;
4522                 stcb->asoc.scope.ipv4_local_scope = 1;
4523                 stcb->asoc.scope.local_scope = 0;
4524                 stcb->asoc.scope.site_scope = 1;
4525                 addr_inscope = 1;
4526         }
4527         net->failure_threshold = stcb->asoc.def_net_failure;
4528         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
4529         if (addr_inscope == 0) {
4530                 net->dest_state = (SCTP_ADDR_REACHABLE |
4531                     SCTP_ADDR_OUT_OF_SCOPE);
4532         } else {
4533                 if (from == SCTP_ADDR_IS_CONFIRMED)
4534                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
4535                         net->dest_state = SCTP_ADDR_REACHABLE;
4536                 else
4537                         net->dest_state = SCTP_ADDR_REACHABLE |
4538                             SCTP_ADDR_UNCONFIRMED;
4539         }
4540         /* We set this to 0, the timer code knows that
4541          * this means its an initial value
4542          */
4543         net->rto_needed = 1;
4544         net->RTO = 0;
4545         net->RTO_measured = 0;
4546         stcb->asoc.numnets++;
4547         net->ref_count = 1;
4548         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
4549         net->port = port;
4550         net->dscp = stcb->asoc.default_dscp;
4551 #ifdef INET6
4552         net->flowlabel = stcb->asoc.default_flowlabel;
4553 #endif
4554         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
4555                 net->dest_state |= SCTP_ADDR_NOHB;
4556         } else {
4557                 net->dest_state &= ~SCTP_ADDR_NOHB;
4558         }
4559         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
4560                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
4561         } else {
4562                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
4563         }
4564         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
4565         /* Init the timer structure */
4566         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
4567         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
4568         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
4569
4570         /* Now generate a route for this guy */
4571 #ifdef INET6
4572 #ifdef SCTP_EMBEDDED_V6_SCOPE
4573         /* KAME hack: embed scopeid */
4574         if (newaddr->sa_family == AF_INET6) {
4575                 struct sockaddr_in6 *sin6;
4576
4577                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4578 #if defined(__APPLE__) && !defined(__Userspace__)
4579 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
4580                 (void)in6_embedscope(&sin6->sin6_addr, sin6, &stcb->sctp_ep->ip_inp.inp, NULL);
4581 #else
4582                 (void)in6_embedscope(&sin6->sin6_addr, sin6, &stcb->sctp_ep->ip_inp.inp, NULL, NULL);
4583 #endif
4584 #elif defined(SCTP_KAME)
4585                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
4586 #else
4587                 (void)in6_embedscope(&sin6->sin6_addr, sin6);
4588 #endif
4589 #ifndef SCOPEDROUTING
4590                 sin6->sin6_scope_id = 0;
4591 #endif
4592         }
4593 #endif /* SCTP_EMBEDDED_V6_SCOPE */
4594 #endif
4595         SCTP_RTALLOC((sctp_route_t *)&net->ro,
4596                      stcb->asoc.vrf_id,
4597                      stcb->sctp_ep->fibnum);
4598
4599         net->src_addr_selected = 0;
4600 #if !defined(__Userspace__)
4601         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
4602                 /* Get source address */
4603                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
4604                                                                 stcb,
4605                                                                 (sctp_route_t *)&net->ro,
4606                                                                 net,
4607                                                                 0,
4608                                                                 stcb->asoc.vrf_id);
4609                 if (stcb->asoc.default_mtu > 0) {
4610                         net->mtu = stcb->asoc.default_mtu;
4611                         switch (net->ro._l_addr.sa.sa_family) {
4612 #ifdef INET
4613                         case AF_INET:
4614                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
4615                                 break;
4616 #endif
4617 #ifdef INET6
4618                         case AF_INET6:
4619                                 net->mtu += SCTP_MIN_OVERHEAD;
4620                                 break;
4621 #endif
4622 #if defined(__Userspace__)
4623                         case AF_CONN:
4624                                 net->mtu += sizeof(struct sctphdr);
4625                                 break;
4626 #endif
4627                         default:
4628                                 break;
4629                         }
4630 #if defined(INET) || defined(INET6)
4631                         if (net->port) {
4632                                 net->mtu += (uint32_t)sizeof(struct udphdr);
4633                         }
4634 #endif
4635                 } else if (net->ro._s_addr != NULL) {
4636                         uint32_t imtu, rmtu, hcmtu;
4637
4638                         net->src_addr_selected = 1;
4639                         /* Now get the interface MTU */
4640                         if (net->ro._s_addr->ifn_p != NULL) {
4641                                 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
4642                         } else {
4643                                 imtu = 0;
4644                         }
4645 #if defined(__FreeBSD__) && !defined(__Userspace__)
4646                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh);
4647                         hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum);
4648 #else
4649                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
4650                         hcmtu = 0;
4651 #endif
4652                         net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu);
4653 #if defined(__FreeBSD__) && !defined(__Userspace__)
4654 #else
4655                         if (rmtu == 0) {
4656                                 /* Start things off to match mtu of interface please. */
4657                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
4658                                                       net->ro.ro_rt, net->mtu);
4659                         }
4660 #endif
4661                 }
4662         }
4663 #endif
4664         if (net->mtu == 0) {
4665                 if (stcb->asoc.default_mtu > 0) {
4666                         net->mtu = stcb->asoc.default_mtu;
4667                         switch (net->ro._l_addr.sa.sa_family) {
4668 #ifdef INET
4669                         case AF_INET:
4670                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
4671                                 break;
4672 #endif
4673 #ifdef INET6
4674                         case AF_INET6:
4675                                 net->mtu += SCTP_MIN_OVERHEAD;
4676                                 break;
4677 #endif
4678 #if defined(__Userspace__)
4679                         case AF_CONN:
4680                                 net->mtu += sizeof(struct sctphdr);
4681                                 break;
4682 #endif
4683                         default:
4684                                 break;
4685                         }
4686 #if defined(INET) || defined(INET6)
4687                         if (net->port) {
4688                                 net->mtu += (uint32_t)sizeof(struct udphdr);
4689                         }
4690 #endif
4691                 } else {
4692                         switch (newaddr->sa_family) {
4693 #ifdef INET
4694                         case AF_INET:
4695                                 net->mtu = SCTP_DEFAULT_MTU;
4696                                 break;
4697 #endif
4698 #ifdef INET6
4699                         case AF_INET6:
4700                                 net->mtu = 1280;
4701                                 break;
4702 #endif
4703 #if defined(__Userspace__)
4704                         case AF_CONN:
4705                                 net->mtu = 1280;
4706                                 break;
4707 #endif
4708                         default:
4709                                 break;
4710                         }
4711                 }
4712         }
4713 #if defined(INET) || defined(INET6)
4714         if (net->port) {
4715                 net->mtu -= (uint32_t)sizeof(struct udphdr);
4716         }
4717 #endif
4718         if (from == SCTP_ALLOC_ASOC) {
4719                 stcb->asoc.smallest_mtu = net->mtu;
4720         }
4721         if (stcb->asoc.smallest_mtu > net->mtu) {
4722                 sctp_pathmtu_adjustment(stcb, net->mtu);
4723         }
4724 #ifdef INET6
4725 #ifdef SCTP_EMBEDDED_V6_SCOPE
4726         if (newaddr->sa_family == AF_INET6) {
4727                 struct sockaddr_in6 *sin6;
4728
4729                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4730 #ifdef SCTP_KAME
4731                 (void)sa6_recoverscope(sin6);
4732 #else
4733                 (void)in6_recoverscope(sin6, &sin6->sin6_addr, NULL);
4734 #endif /* SCTP_KAME */
4735         }
4736 #endif /* SCTP_EMBEDDED_V6_SCOPE */
4737 #endif
4738
4739         /* JRS - Use the congestion control given in the CC module */
4740         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4741                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param)(stcb, net);
4742
4743         /*
4744          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4745          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4746          */
4747         net->find_pseudo_cumack = 1;
4748         net->find_rtx_pseudo_cumack = 1;
4749 #if defined(__FreeBSD__) && !defined(__Userspace__)
4750         /* Choose an initial flowid. */
4751         net->flowid = stcb->asoc.my_vtag ^
4752                       ntohs(stcb->rport) ^
4753                       ntohs(stcb->sctp_ep->sctp_lport);
4754         net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4755 #endif
4756         if (netp) {
4757                 *netp = net;
4758         }
4759         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4760 #if defined(__FreeBSD__) && !defined(__Userspace__)
4761         if (net->ro.ro_nh == NULL) {
4762 #else
4763         if (net->ro.ro_rt == NULL) {
4764 #endif
4765                 /* Since we have no route put it at the back */
4766                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4767         } else if (netfirst == NULL) {
4768                 /* We are the first one in the pool. */
4769                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4770 #if defined(__FreeBSD__) && !defined(__Userspace__)
4771         } else if (netfirst->ro.ro_nh == NULL) {
4772 #else
4773         } else if (netfirst->ro.ro_rt == NULL) {
4774 #endif
4775                 /*
4776                  * First one has NO route. Place this one ahead of the first
4777                  * one.
4778                  */
4779                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4780 #if defined(__FreeBSD__) && !defined(__Userspace__)
4781         } else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) {
4782 #else
4783         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4784 #endif
4785                 /*
4786                  * This one has a different interface than the one at the
4787                  * top of the list. Place it ahead.
4788                  */
4789                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4790         } else {
4791                 /*
4792                  * Ok we have the same interface as the first one. Move
4793                  * forward until we find either a) one with a NULL route...
4794                  * insert ahead of that b) one with a different ifp.. insert
4795                  * after that. c) end of the list.. insert at the tail.
4796                  */
4797                 struct sctp_nets *netlook;
4798
4799                 do {
4800                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4801                         if (netlook == NULL) {
4802                                 /* End of the list */
4803                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4804                                 break;
4805 #if defined(__FreeBSD__) && !defined(__Userspace__)
4806                         } else if (netlook->ro.ro_nh == NULL) {
4807 #else
4808                         } else if (netlook->ro.ro_rt == NULL) {
4809 #endif
4810                                 /* next one has NO route */
4811                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4812                                 break;
4813 #if defined(__FreeBSD__) && !defined(__Userspace__)
4814                         } else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) {
4815 #else
4816                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4817 #endif
4818                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4819                                                    net, sctp_next);
4820                                 break;
4821                         }
4822                         /* Shift forward */
4823                         netfirst = netlook;
4824                 } while (netlook != NULL);
4825         }
4826
4827         /* got to have a primary set */
4828         if (stcb->asoc.primary_destination == 0) {
4829                 stcb->asoc.primary_destination = net;
4830 #if defined(__FreeBSD__) && !defined(__Userspace__)
4831         } else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) &&
4832                    (net->ro.ro_nh) &&
4833 #else
4834         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4835                    (net->ro.ro_rt) &&
4836 #endif
4837                    ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4838                 /* No route to current primary adopt new primary */
4839                 stcb->asoc.primary_destination = net;
4840         }
4841         /* Validate primary is first */
4842         net = TAILQ_FIRST(&stcb->asoc.nets);
4843         if ((net != stcb->asoc.primary_destination) &&
4844             (stcb->asoc.primary_destination)) {
4845                 /* first one on the list is NOT the primary
4846                  * sctp_cmpaddr() is much more efficient if
4847                  * the primary is the first on the list, make it
4848                  * so.
4849                  */
4850                 TAILQ_REMOVE(&stcb->asoc.nets,
4851                              stcb->asoc.primary_destination, sctp_next);
4852                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4853                                   stcb->asoc.primary_destination, sctp_next);
4854         }
4855         return (0);
4856 }
4857
4858
4859 static uint32_t
4860 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4861 {
4862         uint32_t id;
4863         struct sctpasochead *head;
4864         struct sctp_tcb *lstcb;
4865
4866  try_again:
4867         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4868                 /* TSNH */
4869                 return (0);
4870         }
4871         /*
4872          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4873          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4874          */
4875         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4876                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4877         }
4878         id = inp->sctp_associd_counter;
4879         inp->sctp_associd_counter++;
4880         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4881         if (lstcb) {
4882                 goto try_again;
4883         }
4884         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4885         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4886         stcb->asoc.in_asocid_hash = 1;
4887         return (id);
4888 }
4889
4890 /*
4891  * allocate an association and add it to the endpoint. The caller must be
4892  * careful to add all additional addresses once they are know right away or
4893  * else the assoc will be may experience a blackout scenario.
4894  */
4895 struct sctp_tcb *
4896 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4897                 int *error, uint32_t override_tag, uint32_t vrf_id,
4898                 uint16_t o_streams, uint16_t port,
4899 #if defined(__FreeBSD__) && !defined(__Userspace__)
4900                 struct thread *p,
4901 #elif defined(_WIN32) && !defined(__Userspace__)
4902                 PKTHREAD p,
4903 #else
4904 #if defined(__Userspace__)
4905                 /*  __Userspace__ NULL proc is going to be passed here. See sctp_lower_sosend */
4906 #endif
4907                 struct proc *p,
4908 #endif
4909                 int initialize_auth_params)
4910 {
4911         /* note the p argument is only valid in unbound sockets */
4912
4913         struct sctp_tcb *stcb;
4914         struct sctp_association *asoc;
4915         struct sctpasochead *head;
4916         uint16_t rport;
4917         int err;
4918
4919         /*
4920          * Assumption made here: Caller has done a
4921          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4922          * address does not exist already.
4923          */
4924         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4925                 /* Hit max assoc, sorry no more */
4926                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4927                 *error = ENOBUFS;
4928                 return (NULL);
4929         }
4930         if (firstaddr == NULL) {
4931                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4932                 *error = EINVAL;
4933                 return (NULL);
4934         }
4935         SCTP_INP_RLOCK(inp);
4936         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4937             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4938              (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4939                 /*
4940                  * If its in the TCP pool, its NOT allowed to create an
4941                  * association. The parent listener needs to call
4942                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4943                  * off, or connected one does this.. its an error.
4944                  */
4945                 SCTP_INP_RUNLOCK(inp);
4946                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4947                 *error = EINVAL;
4948                 return (NULL);
4949         }
4950         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4951             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4952                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4953                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4954                         SCTP_INP_RUNLOCK(inp);
4955                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4956                         *error = EINVAL;
4957                         return (NULL);
4958                 }
4959         }
4960         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4961 #ifdef SCTP_DEBUG
4962         if (firstaddr) {
4963                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4964                 switch (firstaddr->sa_family) {
4965 #ifdef INET
4966                 case AF_INET:
4967                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4968                                 ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4969                         break;
4970 #endif
4971 #ifdef INET6
4972                 case AF_INET6:
4973                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4974                                 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4975                         break;
4976 #endif
4977 #if defined(__Userspace__)
4978                 case AF_CONN:
4979                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4980                                 ntohs(((struct sockaddr_conn *)firstaddr)->sconn_port));
4981                         break;
4982 #endif
4983                 default:
4984                         break;
4985                 }
4986         } else {
4987                 SCTPDBG(SCTP_DEBUG_PCB3,"None\n");
4988         }
4989 #endif                          /* SCTP_DEBUG */
4990         switch (firstaddr->sa_family) {
4991 #ifdef INET
4992         case AF_INET:
4993         {
4994                 struct sockaddr_in *sin;
4995
4996                 sin = (struct sockaddr_in *)firstaddr;
4997                 if ((ntohs(sin->sin_port) == 0) ||
4998                     (sin->sin_addr.s_addr == INADDR_ANY) ||
4999                     (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
5000                     IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
5001                         /* Invalid address */
5002                         SCTP_INP_RUNLOCK(inp);
5003                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5004                         *error = EINVAL;
5005                         return (NULL);
5006                 }
5007                 rport = sin->sin_port;
5008                 break;
5009         }
5010 #endif
5011 #ifdef INET6
5012         case AF_INET6:
5013         {
5014                 struct sockaddr_in6 *sin6;
5015
5016                 sin6 = (struct sockaddr_in6 *)firstaddr;
5017                 if ((ntohs(sin6->sin6_port) == 0) ||
5018                     IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
5019                     IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
5020                         /* Invalid address */
5021                         SCTP_INP_RUNLOCK(inp);
5022                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5023                         *error = EINVAL;
5024                         return (NULL);
5025                 }
5026                 rport = sin6->sin6_port;
5027                 break;
5028         }
5029 #endif
5030 #if defined(__Userspace__)
5031         case AF_CONN:
5032         {
5033                 struct sockaddr_conn *sconn;
5034
5035                 sconn = (struct sockaddr_conn *)firstaddr;
5036                 if ((ntohs(sconn->sconn_port) == 0) ||
5037                     (sconn->sconn_addr == NULL)) {
5038                         /* Invalid address */
5039                         SCTP_INP_RUNLOCK(inp);
5040                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5041                         *error = EINVAL;
5042                         return (NULL);
5043                 }
5044                 rport = sconn->sconn_port;
5045                 break;
5046         }
5047 #endif
5048         default:
5049                 /* not supported family type */
5050                 SCTP_INP_RUNLOCK(inp);
5051                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5052                 *error = EINVAL;
5053                 return (NULL);
5054         }
5055         SCTP_INP_RUNLOCK(inp);
5056         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
5057                 /*
5058                  * If you have not performed a bind, then we need to do the
5059                  * ephemeral bind for you.
5060                  */
5061                 if ((err = sctp_inpcb_bind(inp->sctp_socket, NULL, NULL, p))) {
5062                         /* bind error, probably perm */
5063                         *error = err;
5064                         return (NULL);
5065                 }
5066         }
5067         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
5068         if (stcb == NULL) {
5069                 /* out of memory? */
5070                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
5071                 *error = ENOMEM;
5072                 return (NULL);
5073         }
5074         SCTP_INCR_ASOC_COUNT();
5075
5076         memset(stcb, 0, sizeof(*stcb));
5077         asoc = &stcb->asoc;
5078
5079         SCTP_TCB_LOCK_INIT(stcb);
5080         SCTP_TCB_SEND_LOCK_INIT(stcb);
5081         stcb->rport = rport;
5082         /* setup back pointer's */
5083         stcb->sctp_ep = inp;
5084         stcb->sctp_socket = inp->sctp_socket;
5085         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
5086                 /* failed */
5087                 SCTP_TCB_LOCK_DESTROY(stcb);
5088                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5089                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5090                 SCTP_DECR_ASOC_COUNT();
5091                 *error = err;
5092                 return (NULL);
5093         }
5094         /* and the port */
5095         SCTP_INP_INFO_WLOCK();
5096         SCTP_INP_WLOCK(inp);
5097         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
5098                 /* inpcb freed while alloc going on */
5099                 SCTP_TCB_LOCK_DESTROY(stcb);
5100                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5101                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5102                 SCTP_INP_WUNLOCK(inp);
5103                 SCTP_INP_INFO_WUNLOCK();
5104                 SCTP_DECR_ASOC_COUNT();
5105                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5106                 *error = EINVAL;
5107                 return (NULL);
5108         }
5109         SCTP_TCB_LOCK(stcb);
5110
5111         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
5112         /* now that my_vtag is set, add it to the hash */
5113         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
5114         /* put it in the bucket in the vtag hash of assoc's for the system */
5115         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
5116         SCTP_INP_INFO_WUNLOCK();
5117
5118         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
5119                 /* failure.. memory error? */
5120                 if (asoc->strmout) {
5121                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5122                         asoc->strmout = NULL;
5123                 }
5124                 if (asoc->mapping_array) {
5125                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5126                         asoc->mapping_array = NULL;
5127                 }
5128                 if (asoc->nr_mapping_array) {
5129                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5130                         asoc->nr_mapping_array = NULL;
5131                 }
5132                 SCTP_DECR_ASOC_COUNT();
5133                 SCTP_TCB_UNLOCK(stcb);
5134                 SCTP_TCB_LOCK_DESTROY(stcb);
5135                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5136                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
5137                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5138                 SCTP_INP_WUNLOCK(inp);
5139                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
5140                 *error = ENOBUFS;
5141                 return (NULL);
5142         }
5143         /* Init all the timers */
5144         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
5145         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
5146         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
5147         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
5148         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
5149         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
5150
5151         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
5152         /* now file the port under the hash as well */
5153         if (inp->sctp_tcbhash != NULL) {
5154                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
5155                     inp->sctp_hashmark)];
5156                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
5157         }
5158         if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) {
5159                 sctp_initialize_auth_params(inp, stcb);
5160         }
5161         SCTP_INP_WUNLOCK(inp);
5162         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
5163         return (stcb);
5164 }
5165
5166
5167 void
5168 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
5169 {
5170         struct sctp_inpcb *inp;
5171         struct sctp_association *asoc;
5172
5173         inp = stcb->sctp_ep;
5174         asoc = &stcb->asoc;
5175         asoc->numnets--;
5176         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5177         if (net == asoc->primary_destination) {
5178                 /* Reset primary */
5179                 struct sctp_nets *lnet;
5180
5181                 lnet = TAILQ_FIRST(&asoc->nets);
5182                 /* Mobility adaptation
5183                    Ideally, if deleted destination is the primary, it becomes
5184                    a fast retransmission trigger by the subsequent SET PRIMARY.
5185                    (by micchie)
5186                  */
5187                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
5188                                                 SCTP_MOBILITY_BASE) ||
5189                     sctp_is_mobility_feature_on(stcb->sctp_ep,
5190                                                 SCTP_MOBILITY_FASTHANDOFF)) {
5191                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
5192                         if (asoc->deleted_primary != NULL) {
5193                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
5194                                 goto out;
5195                         }
5196                         asoc->deleted_primary = net;
5197                         atomic_add_int(&net->ref_count, 1);
5198                         memset(&net->lastsa, 0, sizeof(net->lastsa));
5199                         memset(&net->lastsv, 0, sizeof(net->lastsv));
5200                         sctp_mobility_feature_on(stcb->sctp_ep,
5201                                                  SCTP_MOBILITY_PRIM_DELETED);
5202                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
5203                                          stcb->sctp_ep, stcb, NULL);
5204                 }
5205 out:
5206                 /* Try to find a confirmed primary */
5207                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
5208         }
5209         if (net == asoc->last_data_chunk_from) {
5210                 /* Reset primary */
5211                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
5212         }
5213         if (net == asoc->last_control_chunk_from) {
5214                 /* Clear net */
5215                 asoc->last_control_chunk_from = NULL;
5216         }
5217         if (net == stcb->asoc.alternate) {
5218                 sctp_free_remote_addr(stcb->asoc.alternate);
5219                 stcb->asoc.alternate = NULL;
5220         }
5221         sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
5222                         SCTP_FROM_SCTP_PCB + SCTP_LOC_9);
5223         sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
5224                         SCTP_FROM_SCTP_PCB + SCTP_LOC_10);
5225         net->dest_state |= SCTP_ADDR_BEING_DELETED;
5226         sctp_free_remote_addr(net);
5227 }
5228
5229 /*
5230  * remove a remote endpoint address from an association, it will fail if the
5231  * address does not exist.
5232  */
5233 int
5234 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
5235 {
5236         /*
5237          * Here we need to remove a remote address. This is quite simple, we
5238          * first find it in the list of address for the association
5239          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
5240          * on that item. Note we do not allow it to be removed if there are
5241          * no other addresses.
5242          */
5243         struct sctp_association *asoc;
5244         struct sctp_nets *net, *nnet;
5245
5246         asoc = &stcb->asoc;
5247
5248         /* locate the address */
5249         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5250                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
5251                         continue;
5252                 }
5253                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
5254                     remaddr)) {
5255                         /* we found the guy */
5256                         if (asoc->numnets < 2) {
5257                                 /* Must have at LEAST two remote addresses */
5258                                 return (-1);
5259                         } else {
5260                                 sctp_remove_net(stcb, net);
5261                                 return (0);
5262                         }
5263                 }
5264         }
5265         /* not found. */
5266         return (-2);
5267 }
5268
5269 void
5270 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
5271 {
5272         struct sctpvtaghead *chain;
5273         struct sctp_tagblock *twait_block;
5274         int found = 0;
5275         int i;
5276
5277         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
5278         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5279                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
5280                   if ((twait_block->vtag_block[i].v_tag == tag) &&
5281                       (twait_block->vtag_block[i].lport == lport) &&
5282                       (twait_block->vtag_block[i].rport == rport)) {
5283                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
5284                                 twait_block->vtag_block[i].v_tag = 0;
5285                                 twait_block->vtag_block[i].lport = 0;
5286                                 twait_block->vtag_block[i].rport = 0;
5287                                 found = 1;
5288                                 break;
5289                         }
5290                 }
5291                 if (found)
5292                         break;
5293         }
5294 }
5295
5296 int
5297 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
5298 {
5299         struct sctpvtaghead *chain;
5300         struct sctp_tagblock *twait_block;
5301         int found = 0;
5302         int i;
5303
5304         SCTP_INP_INFO_WLOCK();
5305         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
5306         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5307                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
5308                         if ((twait_block->vtag_block[i].v_tag == tag)  &&
5309                             (twait_block->vtag_block[i].lport == lport)  &&
5310                             (twait_block->vtag_block[i].rport == rport)) {
5311                                 found = 1;
5312                                 break;
5313                         }
5314                 }
5315                 if (found)
5316                         break;
5317         }
5318         SCTP_INP_INFO_WUNLOCK();
5319         return (found);
5320 }
5321
5322
5323 void
5324 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
5325 {
5326         struct sctpvtaghead *chain;
5327         struct sctp_tagblock *twait_block;
5328         struct timeval now;
5329         int set, i;
5330
5331         if (time == 0) {
5332                 /* Its disabled */
5333                 return;
5334         }
5335         (void)SCTP_GETTIME_TIMEVAL(&now);
5336         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
5337         set = 0;
5338         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5339                 /* Block(s) present, lets find space, and expire on the fly */
5340                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
5341                         if ((twait_block->vtag_block[i].v_tag == 0) &&
5342                             !set) {
5343                                 twait_block->vtag_block[i].tv_sec_at_expire =
5344                                         now.tv_sec + time;
5345                                 twait_block->vtag_block[i].v_tag = tag;
5346                                 twait_block->vtag_block[i].lport = lport;
5347                                 twait_block->vtag_block[i].rport = rport;
5348                                 set = 1;
5349                         } else if ((twait_block->vtag_block[i].v_tag) &&
5350                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
5351                                 /* Audit expires this guy */
5352                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
5353                                 twait_block->vtag_block[i].v_tag = 0;
5354                                 twait_block->vtag_block[i].lport = 0;
5355                                 twait_block->vtag_block[i].rport = 0;
5356                                 if (set == 0) {
5357                                         /* Reuse it for my new tag */
5358                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
5359                                         twait_block->vtag_block[i].v_tag = tag;
5360                                         twait_block->vtag_block[i].lport = lport;
5361                                         twait_block->vtag_block[i].rport = rport;
5362                                         set = 1;
5363                                 }
5364                         }
5365                 }
5366                 if (set) {
5367                         /*
5368                          * We only do up to the block where we can
5369                          * place our tag for audits
5370                          */
5371                         break;
5372                 }
5373         }
5374         /* Need to add a new block to chain */
5375         if (!set) {
5376                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
5377                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
5378                 if (twait_block == NULL) {
5379                         return;
5380                 }
5381                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
5382                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
5383                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
5384                 twait_block->vtag_block[0].v_tag = tag;
5385                 twait_block->vtag_block[0].lport = lport;
5386                 twait_block->vtag_block[0].rport = rport;
5387         }
5388 }
5389
5390 void
5391 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
5392 {
5393         struct sctp_tmit_chunk *chk, *nchk;
5394         struct sctp_queued_to_read *control, *ncontrol;
5395
5396         TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) {
5397                 TAILQ_REMOVE(rh, control, next_instrm);
5398                 control->on_strm_q = 0;
5399                 if (control->on_read_q == 0) {
5400                         sctp_free_remote_addr(control->whoFrom);
5401                         if (control->data) {
5402                                 sctp_m_freem(control->data);
5403                                 control->data = NULL;
5404                         }
5405                 }
5406                 /* Reassembly free? */
5407                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
5408                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
5409                         if (chk->data) {
5410                                 sctp_m_freem(chk->data);
5411                                 chk->data = NULL;
5412                         }
5413                         if (chk->holds_key_ref)
5414                                 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5415                         sctp_free_remote_addr(chk->whoTo);
5416                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5417                         SCTP_DECR_CHK_COUNT();
5418                         /*sa_ignore FREED_MEMORY*/
5419                 }
5420                 /*
5421                  * We don't free the address here
5422                  * since all the net's were freed
5423                  * above.
5424                  */
5425                 if (control->on_read_q == 0) {
5426                         sctp_free_a_readq(stcb, control);
5427                 }
5428         }
5429 }
5430
5431 /*-
5432  * Free the association after un-hashing the remote port. This
5433  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
5434  * expect that the input to this function IS a locked TCB.
5435  * It will return 0, if it did NOT destroy the association (instead
5436  * it unlocks it. It will return NON-zero if it either destroyed the
5437  * association OR the association is already destroyed.
5438  */
5439 int
5440 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
5441 {
5442         int i;
5443         struct sctp_association *asoc;
5444         struct sctp_nets *net, *nnet;
5445         struct sctp_laddr *laddr, *naddr;
5446         struct sctp_tmit_chunk *chk, *nchk;
5447         struct sctp_asconf_addr *aparam, *naparam;
5448         struct sctp_asconf_ack *aack, *naack;
5449         struct sctp_stream_reset_list *strrst, *nstrrst;
5450         struct sctp_queued_to_read *sq, *nsq;
5451         struct sctp_stream_queue_pending *sp, *nsp;
5452         sctp_sharedkey_t *shared_key, *nshared_key;
5453         struct socket *so;
5454
5455         /* first, lets purge the entry from the hash table. */
5456 #if defined(__APPLE__) && !defined(__Userspace__)
5457         sctp_lock_assert(SCTP_INP_SO(inp));
5458 #endif
5459
5460 #ifdef SCTP_LOG_CLOSING
5461         sctp_log_closing(inp, stcb, 6);
5462 #endif
5463         if (stcb->asoc.state == 0) {
5464 #ifdef SCTP_LOG_CLOSING
5465                 sctp_log_closing(inp, NULL, 7);
5466 #endif
5467                 /* there is no asoc, really TSNH :-0 */
5468                 return (1);
5469         }
5470         if (stcb->asoc.alternate) {
5471                 sctp_free_remote_addr(stcb->asoc.alternate);
5472                 stcb->asoc.alternate = NULL;
5473         }
5474 #if !(defined(__APPLE__) && !defined(__Userspace__))
5475         /* TEMP CODE */
5476         if (stcb->freed_from_where == 0) {
5477                 /* Only record the first place free happened from */
5478                 stcb->freed_from_where = from_location;
5479         }
5480         /* TEMP CODE */
5481 #endif
5482
5483         asoc = &stcb->asoc;
5484         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
5485             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
5486                 /* nothing around */
5487                 so = NULL;
5488         else
5489                 so = inp->sctp_socket;
5490
5491         /*
5492          * We used timer based freeing if a reader or writer is in the way.
5493          * So we first check if we are actually being called from a timer,
5494          * if so we abort early if a reader or writer is still in the way.
5495          */
5496         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
5497             (from_inpcbfree == SCTP_NORMAL_PROC)) {
5498                 /*
5499                  * is it the timer driving us? if so are the reader/writers
5500                  * gone?
5501                  */
5502                 if (stcb->asoc.refcnt) {
5503                         /* nope, reader or writer in the way */
5504                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
5505                         /* no asoc destroyed */
5506                         SCTP_TCB_UNLOCK(stcb);
5507 #ifdef SCTP_LOG_CLOSING
5508                         sctp_log_closing(inp, stcb, 8);
5509 #endif
5510                         return (0);
5511                 }
5512         }
5513         /* Now clean up any other timers */
5514         sctp_stop_association_timers(stcb, false);
5515         /* Now the read queue needs to be cleaned up (only once) */
5516         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
5517                 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED);
5518                 SCTP_INP_READ_LOCK(inp);
5519                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
5520                         if (sq->stcb == stcb) {
5521                                 sq->do_not_ref_stcb = 1;
5522                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
5523                                 /* If there is no end, there never
5524                                  * will be now.
5525                                  */
5526                                 if (sq->end_added == 0) {
5527                                         /* Held for PD-API clear that. */
5528                                         sq->pdapi_aborted = 1;
5529                                         sq->held_length = 0;
5530                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
5531                                                 /*
5532                                                  * Need to add a PD-API aborted indication.
5533                                                  * Setting the control_pdapi assures that it will
5534                                                  * be added right after this msg.
5535                                                  */
5536                                                 uint32_t strseq;
5537                                                 stcb->asoc.control_pdapi = sq;
5538                                                 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff);
5539                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
5540                                                                 stcb,
5541                                                                 SCTP_PARTIAL_DELIVERY_ABORTED,
5542                                                                 (void *)&strseq,
5543                                                                 SCTP_SO_LOCKED);
5544                                                 stcb->asoc.control_pdapi = NULL;
5545                                         }
5546                                 }
5547                                 /* Add an end to wake them */
5548                                 sq->end_added = 1;
5549                         }
5550                 }
5551                 SCTP_INP_READ_UNLOCK(inp);
5552                 if (stcb->block_entry) {
5553                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
5554                         stcb->block_entry->error = ECONNRESET;
5555                         stcb->block_entry = NULL;
5556                 }
5557         }
5558         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
5559                 /* Someone holds a reference OR the socket is unaccepted yet.
5560                 */
5561                 if ((stcb->asoc.refcnt)  ||
5562                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
5563                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
5564                         SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
5565                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
5566                 }
5567                 SCTP_TCB_UNLOCK(stcb);
5568                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
5569                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
5570                         /* nothing around */
5571                         so = NULL;
5572                 if (so) {
5573                         /* Wake any reader/writers */
5574                         sctp_sorwakeup(inp, so);
5575                         sctp_sowwakeup(inp, so);
5576                 }
5577
5578 #ifdef SCTP_LOG_CLOSING
5579                 sctp_log_closing(inp, stcb, 9);
5580 #endif
5581                 /* no asoc destroyed */
5582                 return (0);
5583         }
5584 #ifdef SCTP_LOG_CLOSING
5585         sctp_log_closing(inp, stcb, 10);
5586 #endif
5587         /* When I reach here, no others want
5588          * to kill the assoc yet.. and I own
5589          * the lock. Now its possible an abort
5590          * comes in when I do the lock exchange
5591          * below to grab all the locks to do
5592          * the final take out. to prevent this
5593          * we increment the count, which will
5594          * start a timer and blow out above thus
5595          * assuring us that we hold exclusive
5596          * killing of the asoc. Note that
5597          * after getting back the TCB lock
5598          * we will go ahead and increment the
5599          * counter back up and stop any timer
5600          * a passing stranger may have started :-S
5601          */
5602         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5603                 atomic_add_int(&stcb->asoc.refcnt, 1);
5604
5605                 SCTP_TCB_UNLOCK(stcb);
5606                 SCTP_INP_INFO_WLOCK();
5607                 SCTP_INP_WLOCK(inp);
5608                 SCTP_TCB_LOCK(stcb);
5609         }
5610         /* Double check the GONE flag */
5611         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
5612             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
5613                 /* nothing around */
5614                 so = NULL;
5615
5616         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
5617             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
5618                 /*
5619                  * For TCP type we need special handling when we are
5620                  * connected. We also include the peel'ed off ones to.
5621                  */
5622                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
5623                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
5624                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
5625                         if (so) {
5626                                 SOCKBUF_LOCK(&so->so_rcv);
5627                                 so->so_state &= ~(SS_ISCONNECTING |
5628                                     SS_ISDISCONNECTING |
5629                                     SS_ISCONFIRMING |
5630                                     SS_ISCONNECTED);
5631                                 so->so_state |= SS_ISDISCONNECTED;
5632 #if defined(__APPLE__) && !defined(__Userspace__)
5633                                 socantrcvmore(so);
5634 #else
5635                                 socantrcvmore_locked(so);
5636 #endif
5637                                 socantsendmore(so);
5638                                 sctp_sowwakeup(inp, so);
5639                                 sctp_sorwakeup(inp, so);
5640                                 SCTP_SOWAKEUP(so);
5641                         }
5642                 }
5643         }
5644
5645         /* Make it invalid too, that way if its
5646          * about to run it will abort and return.
5647          */
5648         /* re-increment the lock */
5649         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5650                 atomic_add_int(&stcb->asoc.refcnt, -1);
5651         }
5652         if (stcb->asoc.refcnt) {
5653                 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
5654                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
5655                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5656                         SCTP_INP_INFO_WUNLOCK();
5657                         SCTP_INP_WUNLOCK(inp);
5658                 }
5659                 SCTP_TCB_UNLOCK(stcb);
5660                 return (0);
5661         }
5662         asoc->state = 0;
5663         if (inp->sctp_tcbhash) {
5664                 LIST_REMOVE(stcb, sctp_tcbhash);
5665         }
5666         if (stcb->asoc.in_asocid_hash) {
5667                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
5668         }
5669         /* Now lets remove it from the list of ALL associations in the EP */
5670         LIST_REMOVE(stcb, sctp_tcblist);
5671         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5672                 SCTP_INP_INCR_REF(inp);
5673                 SCTP_INP_WUNLOCK(inp);
5674         }
5675         /* pull from vtag hash */
5676         LIST_REMOVE(stcb, sctp_asocs);
5677         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
5678                                   inp->sctp_lport, stcb->rport);
5679
5680         /* Now restop the timers to be sure
5681          * this is paranoia at is finest!
5682          */
5683         sctp_stop_association_timers(stcb, true);
5684
5685         /*
5686          * The chunk lists and such SHOULD be empty but we check them just
5687          * in case.
5688          */
5689         /* anything on the wheel needs to be removed */
5690         SCTP_TCB_SEND_LOCK(stcb);
5691         for (i = 0; i < asoc->streamoutcnt; i++) {
5692                 struct sctp_stream_out *outs;
5693
5694                 outs = &asoc->strmout[i];
5695                 /* now clean up any chunks here */
5696                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
5697                         atomic_subtract_int(&asoc->stream_queue_cnt, 1);
5698                         TAILQ_REMOVE(&outs->outqueue, sp, next);
5699                         stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1);
5700                         sctp_free_spbufspace(stcb, asoc, sp);
5701                         if (sp->data) {
5702                                 if (so) {
5703                                         /* Still an open socket - report */
5704                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
5705                                                         0, (void *)sp, SCTP_SO_LOCKED);
5706                                 }
5707                                 if (sp->data) {
5708                                         sctp_m_freem(sp->data);
5709                                         sp->data = NULL;
5710                                         sp->tail_mbuf = NULL;
5711                                         sp->length = 0;
5712                                 }
5713                         }
5714                         if (sp->net) {
5715                                 sctp_free_remote_addr(sp->net);
5716                                 sp->net = NULL;
5717                         }
5718                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
5719                 }
5720         }
5721         SCTP_TCB_SEND_UNLOCK(stcb);
5722         /*sa_ignore FREED_MEMORY*/
5723         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
5724                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
5725                 SCTP_FREE(strrst, SCTP_M_STRESET);
5726         }
5727         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
5728                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
5729                 if (sq->data) {
5730                         sctp_m_freem(sq->data);
5731                         sq->data = NULL;
5732                 }
5733                 sctp_free_remote_addr(sq->whoFrom);
5734                 sq->whoFrom = NULL;
5735                 sq->stcb = NULL;
5736                 /* Free the ctl entry */
5737                 sctp_free_a_readq(stcb, sq);
5738                 /*sa_ignore FREED_MEMORY*/
5739         }
5740         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
5741                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
5742                 if (chk->data) {
5743                         sctp_m_freem(chk->data);
5744                         chk->data = NULL;
5745                 }
5746                 if (chk->holds_key_ref)
5747                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5748                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5749                 SCTP_DECR_CHK_COUNT();
5750                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
5751                 asoc->free_chunk_cnt--;
5752                 /*sa_ignore FREED_MEMORY*/
5753         }
5754         /* pending send queue SHOULD be empty */
5755         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5756                 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5757                         asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5758 #ifdef INVARIANTS
5759                 } else {
5760                         panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5761 #endif
5762                 }
5763                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5764                 if (chk->data) {
5765                         if (so) {
5766                                 /* Still a socket? */
5767                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5768                                                 0, chk, SCTP_SO_LOCKED);
5769                         }
5770                         if (chk->data) {
5771                                 sctp_m_freem(chk->data);
5772                                 chk->data = NULL;
5773                         }
5774                 }
5775                 if (chk->holds_key_ref)
5776                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5777                 if (chk->whoTo) {
5778                         sctp_free_remote_addr(chk->whoTo);
5779                         chk->whoTo = NULL;
5780                 }
5781                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5782                 SCTP_DECR_CHK_COUNT();
5783                 /*sa_ignore FREED_MEMORY*/
5784         }
5785         /* sent queue SHOULD be empty */
5786         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5787                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5788                         if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5789                                 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5790 #ifdef INVARIANTS
5791                         } else {
5792                                 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5793 #endif
5794                         }
5795                 }
5796                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5797                 if (chk->data) {
5798                         if (so) {
5799                                 /* Still a socket? */
5800                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5801                                                 0, chk, SCTP_SO_LOCKED);
5802                         }
5803                         if (chk->data) {
5804                                 sctp_m_freem(chk->data);
5805                                 chk->data = NULL;
5806                         }
5807                 }
5808                 if (chk->holds_key_ref)
5809                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5810                 sctp_free_remote_addr(chk->whoTo);
5811                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5812                 SCTP_DECR_CHK_COUNT();
5813                 /*sa_ignore FREED_MEMORY*/
5814         }
5815 #ifdef INVARIANTS
5816         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5817                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5818                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5819                 }
5820         }
5821 #endif
5822         /* control queue MAY not be empty */
5823         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5824                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5825                 if (chk->data) {
5826                         sctp_m_freem(chk->data);
5827                         chk->data = NULL;
5828                 }
5829                 if (chk->holds_key_ref)
5830                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5831                 sctp_free_remote_addr(chk->whoTo);
5832                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5833                 SCTP_DECR_CHK_COUNT();
5834                 /*sa_ignore FREED_MEMORY*/
5835         }
5836         /* ASCONF queue MAY not be empty */
5837         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5838                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5839                 if (chk->data) {
5840                         sctp_m_freem(chk->data);
5841                         chk->data = NULL;
5842                 }
5843                 if (chk->holds_key_ref)
5844                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5845                 sctp_free_remote_addr(chk->whoTo);
5846                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5847                 SCTP_DECR_CHK_COUNT();
5848                 /*sa_ignore FREED_MEMORY*/
5849         }
5850         if (asoc->mapping_array) {
5851                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5852                 asoc->mapping_array = NULL;
5853         }
5854         if (asoc->nr_mapping_array) {
5855                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5856                 asoc->nr_mapping_array = NULL;
5857         }
5858         /* the stream outs */
5859         if (asoc->strmout) {
5860                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5861                 asoc->strmout = NULL;
5862         }
5863         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5864         if (asoc->strmin) {
5865                 for (i = 0; i < asoc->streamincnt; i++) {
5866                         sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5867                         sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5868                 }
5869                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5870                 asoc->strmin = NULL;
5871         }
5872         asoc->streamincnt = 0;
5873         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5874 #ifdef INVARIANTS
5875                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5876                         panic("no net's left alloc'ed, or list points to itself");
5877                 }
5878 #endif
5879                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5880                 sctp_free_remote_addr(net);
5881         }
5882         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5883                 /*sa_ignore FREED_MEMORY*/
5884                 sctp_remove_laddr(laddr);
5885         }
5886
5887         /* pending asconf (address) parameters */
5888         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5889                 /*sa_ignore FREED_MEMORY*/
5890                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5891                 SCTP_FREE(aparam,SCTP_M_ASC_ADDR);
5892         }
5893         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5894                 /*sa_ignore FREED_MEMORY*/
5895                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5896                 if (aack->data != NULL) {
5897                         sctp_m_freem(aack->data);
5898                 }
5899                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5900         }
5901         /* clean up auth stuff */
5902         if (asoc->local_hmacs)
5903                 sctp_free_hmaclist(asoc->local_hmacs);
5904         if (asoc->peer_hmacs)
5905                 sctp_free_hmaclist(asoc->peer_hmacs);
5906
5907         if (asoc->local_auth_chunks)
5908                 sctp_free_chunklist(asoc->local_auth_chunks);
5909         if (asoc->peer_auth_chunks)
5910                 sctp_free_chunklist(asoc->peer_auth_chunks);
5911
5912         sctp_free_authinfo(&asoc->authinfo);
5913
5914         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5915                 LIST_REMOVE(shared_key, next);
5916                 sctp_free_sharedkey(shared_key);
5917                 /*sa_ignore FREED_MEMORY*/
5918         }
5919
5920         /* Insert new items here :> */
5921
5922         /* Get rid of LOCK */
5923         SCTP_TCB_UNLOCK(stcb);
5924         SCTP_TCB_LOCK_DESTROY(stcb);
5925         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5926         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5927                 SCTP_INP_INFO_WUNLOCK();
5928                 SCTP_INP_RLOCK(inp);
5929         }
5930 #if defined(__APPLE__) && !defined(__Userspace__)
5931         /* TEMP CODE */
5932         stcb->freed_from_where = from_location;
5933 #endif
5934 #ifdef SCTP_TRACK_FREED_ASOCS
5935         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5936                 /* now clean up the tasoc itself */
5937                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5938                 SCTP_DECR_ASOC_COUNT();
5939         } else {
5940                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5941         }
5942 #else
5943         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5944         SCTP_DECR_ASOC_COUNT();
5945 #endif
5946         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5947                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5948                         /* If its NOT the inp_free calling us AND
5949                          * sctp_close as been called, we
5950                          * call back...
5951                          */
5952                         SCTP_INP_RUNLOCK(inp);
5953                         /* This will start the kill timer (if we are
5954                          * the last one) since we hold an increment yet. But
5955                          * this is the only safe way to do this
5956                          * since otherwise if the socket closes
5957                          * at the same time we are here we might
5958                          * collide in the cleanup.
5959                          */
5960                         sctp_inpcb_free(inp,
5961                                         SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5962                                         SCTP_CALLED_DIRECTLY_NOCMPSET);
5963                         SCTP_INP_DECR_REF(inp);
5964                 } else {
5965                         /* The socket is still open. */
5966                         SCTP_INP_DECR_REF(inp);
5967                         SCTP_INP_RUNLOCK(inp);
5968                 }
5969         }
5970         /* destroyed the asoc */
5971 #ifdef SCTP_LOG_CLOSING
5972         sctp_log_closing(inp, NULL, 11);
5973 #endif
5974         return (1);
5975 }
5976
5977
5978
5979 /*
5980  * determine if a destination is "reachable" based upon the addresses bound
5981  * to the current endpoint (e.g. only v4 or v6 currently bound)
5982  */
5983 /*
5984  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5985  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5986  * types bound as its endpoint
5987  */
5988 int
5989 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5990 {
5991         struct sctp_inpcb *inp;
5992         int answer;
5993
5994         /*
5995          * No locks here, the TCB, in all cases is already locked and an
5996          * assoc is up. There is either a INP lock by the caller applied (in
5997          * asconf case when deleting an address) or NOT in the HB case,
5998          * however if HB then the INP increment is up and the INP will not
5999          * be removed (on top of the fact that we have a TCB lock). So we
6000          * only want to read the sctp_flags, which is either bound-all or
6001          * not.. no protection needed since once an assoc is up you can't be
6002          * changing your binding.
6003          */
6004         inp = stcb->sctp_ep;
6005         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
6006                 /* if bound all, destination is not restricted */
6007                 /*
6008                  * RRS: Question during lock work: Is this correct? If you
6009                  * are bound-all you still might need to obey the V4--V6
6010                  * flags??? IMO this bound-all stuff needs to be removed!
6011                  */
6012                 return (1);
6013         }
6014         /* NOTE: all "scope" checks are done when local addresses are added */
6015         switch (destaddr->sa_family) {
6016 #ifdef INET6
6017         case AF_INET6:
6018                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
6019                 break;
6020 #endif
6021 #ifdef INET
6022         case AF_INET:
6023                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
6024                 break;
6025 #endif
6026 #if defined(__Userspace__)
6027         case AF_CONN:
6028                 answer = inp->ip_inp.inp.inp_vflag & INP_CONN;
6029                 break;
6030 #endif
6031         default:
6032                 /* invalid family, so it's unreachable */
6033                 answer = 0;
6034                 break;
6035         }
6036         return (answer);
6037 }
6038
6039 /*
6040  * update the inp_vflags on an endpoint
6041  */
6042 static void
6043 sctp_update_ep_vflag(struct sctp_inpcb *inp)
6044 {
6045         struct sctp_laddr *laddr;
6046
6047         /* first clear the flag */
6048         inp->ip_inp.inp.inp_vflag = 0;
6049         /* set the flag based on addresses on the ep list */
6050         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
6051                 if (laddr->ifa == NULL) {
6052                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
6053                                 __func__);
6054                         continue;
6055                 }
6056
6057                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
6058                         continue;
6059                 }
6060                 switch (laddr->ifa->address.sa.sa_family) {
6061 #ifdef INET6
6062                 case AF_INET6:
6063                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
6064                         break;
6065 #endif
6066 #ifdef INET
6067                 case AF_INET:
6068                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
6069                         break;
6070 #endif
6071 #if defined(__Userspace__)
6072                 case AF_CONN:
6073                         inp->ip_inp.inp.inp_vflag |= INP_CONN;
6074                         break;
6075 #endif
6076                 default:
6077                         break;
6078                 }
6079         }
6080 }
6081
6082 /*
6083  * Add the address to the endpoint local address list There is nothing to be
6084  * done if we are bound to all addresses
6085  */
6086 void
6087 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
6088 {
6089         struct sctp_laddr *laddr;
6090         struct sctp_tcb *stcb;
6091         int fnd, error = 0;
6092
6093         fnd = 0;
6094
6095         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
6096                 /* You are already bound to all. You have it already */
6097                 return;
6098         }
6099 #ifdef INET6
6100         if (ifa->address.sa.sa_family == AF_INET6) {
6101                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
6102                         /* Can't bind a non-useable addr. */
6103                         return;
6104                 }
6105         }
6106 #endif
6107         /* first, is it already present? */
6108         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
6109                 if (laddr->ifa == ifa) {
6110                         fnd = 1;
6111                         break;
6112                 }
6113         }
6114
6115         if (fnd == 0) {
6116                 /* Not in the ep list */
6117                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
6118                 if (error != 0)
6119                         return;
6120                 inp->laddr_count++;
6121                 /* update inp_vflag flags */
6122                 switch (ifa->address.sa.sa_family) {
6123 #ifdef INET6
6124                 case AF_INET6:
6125                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
6126                         break;
6127 #endif
6128 #ifdef INET
6129                 case AF_INET:
6130                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
6131                         break;
6132 #endif
6133 #if defined(__Userspace__)
6134                 case AF_CONN:
6135                         inp->ip_inp.inp.inp_vflag |= INP_CONN;
6136                         break;
6137 #endif
6138                 default:
6139                         break;
6140                 }
6141                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6142                         sctp_add_local_addr_restricted(stcb, ifa);
6143                 }
6144         }
6145         return;
6146 }
6147
6148
6149 /*
6150  * select a new (hopefully reachable) destination net (should only be used
6151  * when we deleted an ep addr that is the only usable source address to reach
6152  * the destination net)
6153  */
6154 static void
6155 sctp_select_primary_destination(struct sctp_tcb *stcb)
6156 {
6157         struct sctp_nets *net;
6158
6159         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6160                 /* for now, we'll just pick the first reachable one we find */
6161                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
6162                         continue;
6163                 if (sctp_destination_is_reachable(stcb,
6164                     (struct sockaddr *)&net->ro._l_addr)) {
6165                         /* found a reachable destination */
6166                         stcb->asoc.primary_destination = net;
6167                 }
6168         }
6169         /* I can't there from here! ...we're gonna die shortly... */
6170 }
6171
6172
6173 /*
6174  * Delete the address from the endpoint local address list. There is nothing
6175  * to be done if we are bound to all addresses
6176  */
6177 void
6178 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
6179 {
6180         struct sctp_laddr *laddr;
6181         int fnd;
6182
6183         fnd = 0;
6184         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
6185                 /* You are already bound to all. You have it already */
6186                 return;
6187         }
6188         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
6189                 if (laddr->ifa == ifa) {
6190                         fnd = 1;
6191                         break;
6192                 }
6193         }
6194         if (fnd && (inp->laddr_count < 2)) {
6195                 /* can't delete unless there are at LEAST 2 addresses */
6196                 return;
6197         }
6198         if (fnd) {
6199                 /*
6200                  * clean up any use of this address go through our
6201                  * associations and clear any last_used_address that match
6202                  * this one for each assoc, see if a new primary_destination
6203                  * is needed
6204                  */
6205                 struct sctp_tcb *stcb;
6206
6207                 /* clean up "next_addr_touse" */
6208                 if (inp->next_addr_touse == laddr)
6209                         /* delete this address */
6210                         inp->next_addr_touse = NULL;
6211
6212                 /* clean up "last_used_address" */
6213                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6214                         struct sctp_nets *net;
6215
6216                         SCTP_TCB_LOCK(stcb);
6217                         if (stcb->asoc.last_used_address == laddr)
6218                                 /* delete this address */
6219                                 stcb->asoc.last_used_address = NULL;
6220                         /* Now spin through all the nets and purge any ref to laddr */
6221                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6222                                 if (net->ro._s_addr == laddr->ifa) {
6223                                         /* Yep, purge src address selected */
6224 #if defined(__FreeBSD__) && !defined(__Userspace__)
6225                                         RO_NHFREE(&net->ro);
6226 #else
6227                                         sctp_rtentry_t *rt;
6228
6229                                         /* delete this address if cached */
6230                                         rt = net->ro.ro_rt;
6231                                         if (rt != NULL) {
6232                                                 RTFREE(rt);
6233                                                 net->ro.ro_rt = NULL;
6234                                         }
6235 #endif
6236                                         sctp_free_ifa(net->ro._s_addr);
6237                                         net->ro._s_addr = NULL;
6238                                         net->src_addr_selected = 0;
6239                                 }
6240                         }
6241                         SCTP_TCB_UNLOCK(stcb);
6242                 }               /* for each tcb */
6243                 /* remove it from the ep list */
6244                 sctp_remove_laddr(laddr);
6245                 inp->laddr_count--;
6246                 /* update inp_vflag flags */
6247                 sctp_update_ep_vflag(inp);
6248         }
6249         return;
6250 }
6251
6252 /*
6253  * Add the address to the TCB local address restricted list.
6254  * This is a "pending" address list (eg. addresses waiting for an
6255  * ASCONF-ACK response) and cannot be used as a valid source address.
6256  */
6257 void
6258 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
6259 {
6260         struct sctp_laddr *laddr;
6261         struct sctpladdr *list;
6262
6263         /*
6264          * Assumes TCB is locked.. and possibly the INP. May need to
6265          * confirm/fix that if we need it and is not the case.
6266          */
6267         list = &stcb->asoc.sctp_restricted_addrs;
6268
6269 #ifdef INET6
6270         if (ifa->address.sa.sa_family == AF_INET6) {
6271                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
6272                         /* Can't bind a non-existent addr. */
6273                         return;
6274                 }
6275         }
6276 #endif
6277         /* does the address already exist? */
6278         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
6279                 if (laddr->ifa == ifa) {
6280                         return;
6281                 }
6282         }
6283
6284         /* add to the list */
6285         (void)sctp_insert_laddr(list, ifa, 0);
6286         return;
6287 }
6288
6289 /*
6290  * Remove a local address from the TCB local address restricted list
6291  */
6292 void
6293 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
6294 {
6295         struct sctp_inpcb *inp;
6296         struct sctp_laddr *laddr;
6297
6298         /*
6299          * This is called by asconf work. It is assumed that a) The TCB is
6300          * locked and b) The INP is locked. This is true in as much as I can
6301          * trace through the entry asconf code where I did these locks.
6302          * Again, the ASCONF code is a bit different in that it does lock
6303          * the INP during its work often times. This must be since we don't
6304          * want other proc's looking up things while what they are looking
6305          * up is changing :-D
6306          */
6307
6308         inp = stcb->sctp_ep;
6309         /* if subset bound and don't allow ASCONF's, can't delete last */
6310         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
6311             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
6312                 if (stcb->sctp_ep->laddr_count < 2) {
6313                         /* can't delete last address */
6314                         return;
6315                 }
6316         }
6317         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
6318                 /* remove the address if it exists */
6319                 if (laddr->ifa == NULL)
6320                         continue;
6321                 if (laddr->ifa == ifa) {
6322                         sctp_remove_laddr(laddr);
6323                         return;
6324                 }
6325         }
6326
6327         /* address not found! */
6328         return;
6329 }
6330
6331 #if defined(__FreeBSD__) && !defined(__Userspace__)
6332 /* sysctl */
6333 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
6334 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
6335 #endif
6336
6337 #if defined(__FreeBSD__) && !defined(__Userspace__)
6338 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
6339 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
6340 int *sctp_cpuarry = NULL;
6341
6342 void
6343 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
6344 {
6345         /* Queue a packet to a processor for the specified core */
6346         struct sctp_mcore_queue *qent;
6347         struct sctp_mcore_ctrl *wkq;
6348         int need_wake = 0;
6349
6350         if (sctp_mcore_workers == NULL) {
6351                 /* Something went way bad during setup */
6352                 sctp_input_with_port(m, off, 0);
6353                 return;
6354         }
6355         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
6356                     (sizeof(struct sctp_mcore_queue)),
6357                     SCTP_M_MCORE);
6358         if (qent == NULL) {
6359                 /* This is trouble  */
6360                 sctp_input_with_port(m, off, 0);
6361                 return;
6362         }
6363         qent->vn = curvnet;
6364         qent->m = m;
6365         qent->off = off;
6366         qent->v6 = 0;
6367         wkq = &sctp_mcore_workers[cpu_to_use];
6368         SCTP_MCORE_QLOCK(wkq);
6369
6370         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
6371         if (wkq->running == 0) {
6372                 need_wake = 1;
6373         }
6374         SCTP_MCORE_QUNLOCK(wkq);
6375         if (need_wake) {
6376                 wakeup(&wkq->running);
6377         }
6378 }
6379
6380 static void
6381 sctp_mcore_thread(void *arg)
6382 {
6383
6384         struct sctp_mcore_ctrl *wkq;
6385         struct sctp_mcore_queue *qent;
6386
6387         wkq = (struct sctp_mcore_ctrl *)arg;
6388         struct mbuf *m;
6389         int off, v6;
6390
6391         /* Wait for first tickle */
6392         SCTP_MCORE_LOCK(wkq);
6393         wkq->running = 0;
6394         msleep(&wkq->running,
6395                &wkq->core_mtx,
6396                0, "wait for pkt", 0);
6397         SCTP_MCORE_UNLOCK(wkq);
6398
6399         /* Bind to our cpu */
6400         thread_lock(curthread);
6401         sched_bind(curthread, wkq->cpuid);
6402         thread_unlock(curthread);
6403
6404         /* Now lets start working */
6405         SCTP_MCORE_LOCK(wkq);
6406         /* Now grab lock and go */
6407         for (;;) {
6408                 SCTP_MCORE_QLOCK(wkq);
6409         skip_sleep:
6410                 wkq->running = 1;
6411                 qent = TAILQ_FIRST(&wkq->que);
6412                 if (qent) {
6413                         TAILQ_REMOVE(&wkq->que, qent, next);
6414                         SCTP_MCORE_QUNLOCK(wkq);
6415                         CURVNET_SET(qent->vn);
6416                         m = qent->m;
6417                         off = qent->off;
6418                         v6 = qent->v6;
6419                         SCTP_FREE(qent, SCTP_M_MCORE);
6420                         if (v6 == 0) {
6421                                 sctp_input_with_port(m, off, 0);
6422                         } else {
6423                                 SCTP_PRINTF("V6 not yet supported\n");
6424                                 sctp_m_freem(m);
6425                         }
6426                         CURVNET_RESTORE();
6427                         SCTP_MCORE_QLOCK(wkq);
6428                 }
6429                 wkq->running = 0;
6430                 if (!TAILQ_EMPTY(&wkq->que)) {
6431                         goto skip_sleep;
6432                 }
6433                 SCTP_MCORE_QUNLOCK(wkq);
6434                 msleep(&wkq->running,
6435                        &wkq->core_mtx,
6436                        0, "wait for pkt", 0);
6437         }
6438 }
6439
6440 static void
6441 sctp_startup_mcore_threads(void)
6442 {
6443         int i, cpu;
6444
6445         if (mp_ncpus == 1)
6446                 return;
6447
6448         if (sctp_mcore_workers != NULL) {
6449                 /* Already been here in some previous
6450                  * vnet?
6451                  */
6452                 return;
6453         }
6454         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
6455                     ((mp_maxid+1) * sizeof(struct sctp_mcore_ctrl)),
6456                     SCTP_M_MCORE);
6457         if (sctp_mcore_workers == NULL) {
6458                 /* TSNH I hope */
6459                 return;
6460         }
6461         memset(sctp_mcore_workers, 0 , ((mp_maxid+1) *
6462                                         sizeof(struct sctp_mcore_ctrl)));
6463         /* Init the structures */
6464         for (i = 0; i<=mp_maxid; i++) {
6465                 TAILQ_INIT(&sctp_mcore_workers[i].que);
6466                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
6467                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
6468                 sctp_mcore_workers[i].cpuid = i;
6469         }
6470         if (sctp_cpuarry == NULL) {
6471                 SCTP_MALLOC(sctp_cpuarry, int *,
6472                             (mp_ncpus * sizeof(int)),
6473                             SCTP_M_MCORE);
6474                 i = 0;
6475                 CPU_FOREACH(cpu) {
6476                         sctp_cpuarry[i] = cpu;
6477                         i++;
6478                 }
6479         }
6480         /* Now start them all */
6481         CPU_FOREACH(cpu) {
6482                 (void)kproc_create(sctp_mcore_thread,
6483                                    (void *)&sctp_mcore_workers[cpu],
6484                                    &sctp_mcore_workers[cpu].thread_proc,
6485                                    RFPROC,
6486                                    SCTP_KTHREAD_PAGES,
6487                                    SCTP_MCORE_NAME);
6488         }
6489 }
6490 #endif
6491 #endif
6492
6493 #if defined(__FreeBSD__) && !defined(__Userspace__)
6494 #if defined(SCTP_NOT_YET)
6495 static struct mbuf *
6496 sctp_netisr_hdlr(struct mbuf *m, uintptr_t source)
6497 {
6498         struct ip *ip;
6499         struct sctphdr *sh;
6500         int offset;
6501         uint32_t flowid, tag;
6502
6503         /*
6504          * No flow id built by lower layers fix it so we
6505          * create one.
6506          */
6507         ip = mtod(m, struct ip *);
6508         offset = (ip->ip_hl << 2) + sizeof(struct sctphdr);
6509         if (SCTP_BUF_LEN(m) < offset) {
6510                 if ((m = m_pullup(m, offset)) == NULL) {
6511                         SCTP_STAT_INCR(sctps_hdrops);
6512                         return (NULL);
6513                 }
6514                 ip = mtod(m, struct ip *);
6515         }
6516         sh = (struct sctphdr *)((caddr_t)ip + (ip->ip_hl << 2));
6517         tag = htonl(sh->v_tag);
6518         flowid = tag ^ ntohs(sh->dest_port) ^ ntohs(sh->src_port);
6519         m->m_pkthdr.flowid = flowid;
6520         /* FIX ME */
6521         m->m_flags |= M_FLOWID;
6522         return (m);
6523 }
6524
6525 #endif
6526 #endif
6527 void
6528 #if defined(__Userspace__)
6529 sctp_pcb_init(int start_threads)
6530 #else
6531 sctp_pcb_init(void)
6532 #endif
6533 {
6534         /*
6535          * SCTP initialization for the PCB structures should be called by
6536          * the sctp_init() function.
6537          */
6538         int i;
6539         struct timeval tv;
6540
6541         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
6542                 /* error I was called twice */
6543                 return;
6544         }
6545         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
6546
6547 #if defined(SCTP_PROCESS_LEVEL_LOCKS)
6548 #if !defined(_WIN32)
6549         pthread_mutexattr_init(&SCTP_BASE_VAR(mtx_attr));
6550 #ifdef INVARIANTS
6551         pthread_mutexattr_settype(&SCTP_BASE_VAR(mtx_attr), PTHREAD_MUTEX_ERRORCHECK);
6552 #endif
6553 #endif
6554 #endif
6555 #if defined(SCTP_LOCAL_TRACE_BUF)
6556 #if defined(_WIN32) && !defined(__Userspace__)
6557         if (SCTP_BASE_SYSCTL(sctp_log) != NULL) {
6558                 memset(SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log));
6559         }
6560 #else
6561         memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log));
6562 #endif
6563 #endif
6564 #if defined(__FreeBSD__) && !defined(__Userspace__)
6565 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6566         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
6567                     ((mp_maxid+1) * sizeof(struct sctpstat)),
6568                     SCTP_M_MCORE);
6569 #endif
6570 #endif
6571         (void)SCTP_GETTIME_TIMEVAL(&tv);
6572 #if defined(__FreeBSD__) && !defined(__Userspace__)
6573 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6574         memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid+1));
6575         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
6576         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
6577 #else
6578         memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat));
6579         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
6580         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
6581 #endif
6582 #else
6583         memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat));
6584         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
6585         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
6586 #endif
6587         /* init the empty list of (All) Endpoints */
6588         LIST_INIT(&SCTP_BASE_INFO(listhead));
6589 #if defined(__APPLE__) && !defined(__Userspace__)
6590         LIST_INIT(&SCTP_BASE_INFO(inplisthead));
6591 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) || defined(APPLE_LION) || defined(APPLE_MOUNTAINLION)
6592         SCTP_BASE_INFO(sctbinfo).listhead = &SCTP_BASE_INFO(inplisthead);
6593         SCTP_BASE_INFO(sctbinfo).mtx_grp_attr = lck_grp_attr_alloc_init();
6594         lck_grp_attr_setdefault(SCTP_BASE_INFO(sctbinfo).mtx_grp_attr);
6595         SCTP_BASE_INFO(sctbinfo).mtx_grp = lck_grp_alloc_init("sctppcb", SCTP_BASE_INFO(sctbinfo).mtx_grp_attr);
6596         SCTP_BASE_INFO(sctbinfo).mtx_attr = lck_attr_alloc_init();
6597         lck_attr_setdefault(SCTP_BASE_INFO(sctbinfo).mtx_attr);
6598 #else
6599         SCTP_BASE_INFO(sctbinfo).ipi_listhead = &SCTP_BASE_INFO(inplisthead);
6600         SCTP_BASE_INFO(sctbinfo).ipi_lock_grp_attr = lck_grp_attr_alloc_init();
6601         lck_grp_attr_setdefault(SCTP_BASE_INFO(sctbinfo).ipi_lock_grp_attr);
6602         SCTP_BASE_INFO(sctbinfo).ipi_lock_grp = lck_grp_alloc_init("sctppcb", SCTP_BASE_INFO(sctbinfo).ipi_lock_grp_attr);
6603         SCTP_BASE_INFO(sctbinfo).ipi_lock_attr = lck_attr_alloc_init();
6604         lck_attr_setdefault(SCTP_BASE_INFO(sctbinfo).ipi_lock_attr);
6605 #endif
6606 #if !defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION)
6607         SCTP_BASE_INFO(sctbinfo).ipi_gc = sctp_gc;
6608         in_pcbinfo_attach(&SCTP_BASE_INFO(sctbinfo));
6609 #endif
6610 #endif
6611
6612
6613         /* init the hash table of endpoints */
6614 #if defined(__FreeBSD__) && !defined(__Userspace__)
6615         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
6616         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
6617         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
6618 #endif
6619         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
6620                                                        &SCTP_BASE_INFO(hashasocmark));
6621         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
6622                                                      &SCTP_BASE_INFO(hashmark));
6623         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
6624                                                         &SCTP_BASE_INFO(hashtcpmark));
6625         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
6626
6627
6628         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
6629                                                       &SCTP_BASE_INFO(hashvrfmark));
6630
6631         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
6632                                                       &SCTP_BASE_INFO(vrf_ifn_hashmark));
6633         /* init the zones */
6634         /*
6635          * FIX ME: Should check for NULL returns, but if it does fail we are
6636          * doomed to panic anyways... add later maybe.
6637          */
6638         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
6639                        sizeof(struct sctp_inpcb), maxsockets);
6640
6641         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
6642                        sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
6643
6644         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
6645                        sizeof(struct sctp_laddr),
6646                        (sctp_max_number_of_assoc * sctp_scale_up_for_address));
6647
6648         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
6649                        sizeof(struct sctp_nets),
6650                        (sctp_max_number_of_assoc * sctp_scale_up_for_address));
6651
6652         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
6653                        sizeof(struct sctp_tmit_chunk),
6654                        (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
6655
6656         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
6657                        sizeof(struct sctp_queued_to_read),
6658                        (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
6659
6660         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
6661                        sizeof(struct sctp_stream_queue_pending),
6662                        (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
6663
6664         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
6665                        sizeof(struct sctp_asconf),
6666                        (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
6667
6668         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
6669                        sizeof(struct sctp_asconf_ack),
6670                        (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
6671
6672
6673         /* Master Lock INIT for info structure */
6674         SCTP_INP_INFO_LOCK_INIT();
6675         SCTP_STATLOG_INIT_LOCK();
6676
6677         SCTP_IPI_COUNT_INIT();
6678         SCTP_IPI_ADDR_INIT();
6679 #ifdef SCTP_PACKET_LOGGING
6680         SCTP_IP_PKTLOG_INIT();
6681 #endif
6682         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
6683
6684         SCTP_WQ_ADDR_INIT();
6685         /* not sure if we need all the counts */
6686         SCTP_BASE_INFO(ipi_count_ep) = 0;
6687         /* assoc/tcb zone info */
6688         SCTP_BASE_INFO(ipi_count_asoc) = 0;
6689         /* local addrlist zone info */
6690         SCTP_BASE_INFO(ipi_count_laddr) = 0;
6691         /* remote addrlist zone info */
6692         SCTP_BASE_INFO(ipi_count_raddr) = 0;
6693         /* chunk info */
6694         SCTP_BASE_INFO(ipi_count_chunk) = 0;
6695
6696         /* socket queue zone info */
6697         SCTP_BASE_INFO(ipi_count_readq) = 0;
6698
6699         /* stream out queue cont */
6700         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
6701
6702         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
6703         SCTP_BASE_INFO(ipi_free_chunks) = 0;
6704
6705         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
6706
6707         /* Init the TIMEWAIT list */
6708         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6709                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
6710         }
6711 #if defined(SCTP_PROCESS_LEVEL_LOCKS)
6712 #if defined(_WIN32)
6713         InitializeConditionVariable(&sctp_it_ctl.iterator_wakeup);
6714 #else
6715         (void)pthread_cond_init(&sctp_it_ctl.iterator_wakeup, NULL);
6716 #endif
6717 #endif
6718         sctp_startup_iterator();
6719
6720 #if defined(__FreeBSD__) && !defined(__Userspace__)
6721 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
6722         sctp_startup_mcore_threads();
6723 #endif
6724 #endif
6725
6726         /*
6727          * INIT the default VRF which for BSD is the only one, other O/S's
6728          * may have more. But initially they must start with one and then
6729          * add the VRF's as addresses are added.
6730          */
6731         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
6732 #if defined(__FreeBSD__) && !defined(__Userspace__) && defined(SCTP_NOT_YET)
6733         if (ip_register_flow_handler(sctp_netisr_hdlr, IPPROTO_SCTP)) {
6734                 SCTP_PRINTF("***SCTP- Error can't register netisr handler***\n");
6735         }
6736 #endif
6737 #if defined(_SCTP_NEEDS_CALLOUT_) || defined(_USER_SCTP_NEEDS_CALLOUT_)
6738         /* allocate the lock for the callout/timer queue */
6739         SCTP_TIMERQ_LOCK_INIT();
6740         TAILQ_INIT(&SCTP_BASE_INFO(callqueue));
6741 #endif
6742 #if defined(__Userspace__)
6743         mbuf_initialize(NULL);
6744         atomic_init();
6745 #if defined(INET) || defined(INET6)
6746         if (start_threads)
6747                 recv_thread_init();
6748 #endif
6749 #endif
6750 }
6751
6752 /*
6753  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
6754  */
6755 void
6756 sctp_pcb_finish(void)
6757 {
6758         struct sctp_vrflist *vrf_bucket;
6759         struct sctp_vrf *vrf, *nvrf;
6760         struct sctp_ifn *ifn, *nifn;
6761         struct sctp_ifa *ifa, *nifa;
6762         struct sctpvtaghead *chain;
6763         struct sctp_tagblock *twait_block, *prev_twait_block;
6764         struct sctp_laddr *wi, *nwi;
6765         int i;
6766         struct sctp_iterator *it, *nit;
6767
6768         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
6769                 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
6770                 return;
6771         }
6772         SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
6773 #if !(defined(__FreeBSD__) && !defined(__Userspace__))
6774         /* Notify the iterator to exit. */
6775         SCTP_IPI_ITERATOR_WQ_LOCK();
6776         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_MUST_EXIT;
6777         sctp_wakeup_iterator();
6778         SCTP_IPI_ITERATOR_WQ_UNLOCK();
6779 #endif
6780 #if defined(__APPLE__) && !defined(__Userspace__)
6781 #if !defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION)
6782         in_pcbinfo_detach(&SCTP_BASE_INFO(sctbinfo));
6783 #endif
6784         SCTP_IPI_ITERATOR_WQ_LOCK();
6785         do {
6786                 msleep(&sctp_it_ctl.iterator_flags,
6787                        sctp_it_ctl.ipi_iterator_wq_mtx,
6788                        0, "waiting_for_work", 0);
6789         } while ((sctp_it_ctl.iterator_flags & SCTP_ITERATOR_EXITED) == 0);
6790         thread_deallocate(sctp_it_ctl.thread_proc);
6791         SCTP_IPI_ITERATOR_WQ_UNLOCK();
6792 #endif
6793 #if defined(_WIN32) && !defined(__Userspace__)
6794         if (sctp_it_ctl.iterator_thread_obj != NULL) {
6795                 NTSTATUS status = STATUS_SUCCESS;
6796
6797                 KeSetEvent(&sctp_it_ctl.iterator_wakeup[1], IO_NO_INCREMENT, FALSE);
6798                 status = KeWaitForSingleObject(sctp_it_ctl.iterator_thread_obj,
6799                                                Executive,
6800                                                KernelMode,
6801                                                FALSE,
6802                                                NULL);
6803                 ObDereferenceObject(sctp_it_ctl.iterator_thread_obj);
6804         }
6805 #endif
6806 #if defined(__Userspace__)
6807         if (SCTP_BASE_VAR(iterator_thread_started)) {
6808 #if defined(_WIN32)
6809                 WaitForSingleObject(sctp_it_ctl.thread_proc, INFINITE);
6810                 CloseHandle(sctp_it_ctl.thread_proc);
6811                 sctp_it_ctl.thread_proc = NULL;
6812 #else
6813                 pthread_join(sctp_it_ctl.thread_proc, NULL);
6814                 sctp_it_ctl.thread_proc = 0;
6815 #endif
6816         }
6817 #endif
6818 #if defined(SCTP_PROCESS_LEVEL_LOCKS)
6819 #if defined(_WIN32)
6820         DeleteConditionVariable(&sctp_it_ctl.iterator_wakeup);
6821 #else
6822         pthread_cond_destroy(&sctp_it_ctl.iterator_wakeup);
6823         pthread_mutexattr_destroy(&SCTP_BASE_VAR(mtx_attr));
6824 #endif
6825 #endif
6826         /* In FreeBSD the iterator thread never exits
6827          * but we do clean up.
6828          * The only way FreeBSD reaches here is if we have VRF's
6829          * but we still add the ifdef to make it compile on old versions.
6830          */
6831 #if defined(__FreeBSD__) && !defined(__Userspace__)
6832 retry:
6833 #endif
6834         SCTP_IPI_ITERATOR_WQ_LOCK();
6835 #if defined(__FreeBSD__) && !defined(__Userspace__)
6836         /*
6837          * sctp_iterator_worker() might be working on an it entry without
6838          * holding the lock.  We won't find it on the list either and
6839          * continue and free/destroy it.  While holding the lock, spin, to
6840          * avoid the race condition as sctp_iterator_worker() will have to
6841          * wait to re-acquire the lock.
6842          */
6843         if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
6844                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
6845                 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
6846                             "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
6847                 DELAY(10);
6848                 goto retry;
6849         }
6850 #endif
6851         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
6852 #if defined(__FreeBSD__) && !defined(__Userspace__)
6853                 if (it->vn != curvnet) {
6854                         continue;
6855                 }
6856 #endif
6857                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
6858                 if (it->function_atend != NULL) {
6859                         (*it->function_atend) (it->pointer, it->val);
6860                 }
6861                 SCTP_FREE(it,SCTP_M_ITER);
6862         }
6863         SCTP_IPI_ITERATOR_WQ_UNLOCK();
6864 #if defined(__FreeBSD__) && !defined(__Userspace__)
6865         SCTP_ITERATOR_LOCK();
6866         if ((sctp_it_ctl.cur_it) &&
6867             (sctp_it_ctl.cur_it->vn == curvnet)) {
6868                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
6869         }
6870         SCTP_ITERATOR_UNLOCK();
6871 #endif
6872 #if !(defined(__FreeBSD__) && !defined(__Userspace__))
6873         SCTP_IPI_ITERATOR_WQ_DESTROY();
6874         SCTP_ITERATOR_LOCK_DESTROY();
6875 #endif
6876         SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
6877         SCTP_WQ_ADDR_LOCK();
6878         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
6879                 LIST_REMOVE(wi, sctp_nxt_addr);
6880                 SCTP_DECR_LADDR_COUNT();
6881                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
6882                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
6883                 }
6884                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
6885         }
6886         SCTP_WQ_ADDR_UNLOCK();
6887
6888         /*
6889          * free the vrf/ifn/ifa lists and hashes (be sure address monitor
6890          * is destroyed first).
6891          */
6892         SCTP_IPI_ADDR_WLOCK();
6893         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
6894         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
6895                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
6896                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
6897                                 /* free the ifa */
6898                                 LIST_REMOVE(ifa, next_bucket);
6899                                 LIST_REMOVE(ifa, next_ifa);
6900                                 SCTP_FREE(ifa, SCTP_M_IFA);
6901                         }
6902                         /* free the ifn */
6903                         LIST_REMOVE(ifn, next_bucket);
6904                         LIST_REMOVE(ifn, next_ifn);
6905                         SCTP_FREE(ifn, SCTP_M_IFN);
6906                 }
6907                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
6908                 /* free the vrf */
6909                 LIST_REMOVE(vrf, next_vrf);
6910                 SCTP_FREE(vrf, SCTP_M_VRF);
6911         }
6912         SCTP_IPI_ADDR_WUNLOCK();
6913         /* free the vrf hashes */
6914         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
6915         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
6916
6917         /* free the TIMEWAIT list elements malloc'd in the function
6918          * sctp_add_vtag_to_timewait()...
6919          */
6920         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6921                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
6922                 if (!LIST_EMPTY(chain)) {
6923                         prev_twait_block = NULL;
6924                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6925                                 if (prev_twait_block) {
6926                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6927                                 }
6928                                 prev_twait_block = twait_block;
6929                         }
6930                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6931                 }
6932         }
6933
6934         /* free the locks and mutexes */
6935 #if defined(__APPLE__) && !defined(__Userspace__)
6936         SCTP_TIMERQ_LOCK_DESTROY();
6937 #endif
6938 #ifdef SCTP_PACKET_LOGGING
6939         SCTP_IP_PKTLOG_DESTROY();
6940 #endif
6941         SCTP_IPI_ADDR_DESTROY();
6942 #if defined(__APPLE__) && !defined(__Userspace__)
6943         SCTP_IPI_COUNT_DESTROY();
6944 #endif
6945         SCTP_STATLOG_DESTROY();
6946         SCTP_INP_INFO_LOCK_DESTROY();
6947
6948         SCTP_WQ_ADDR_DESTROY();
6949
6950 #if defined(__APPLE__) && !defined(__Userspace__)
6951 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) || defined(APPLE_LION) || defined(APPLE_MOUNTAINLION)
6952         lck_grp_attr_free(SCTP_BASE_INFO(sctbinfo).mtx_grp_attr);
6953         lck_grp_free(SCTP_BASE_INFO(sctbinfo).mtx_grp);
6954         lck_attr_free(SCTP_BASE_INFO(sctbinfo).mtx_attr);
6955 #else
6956         lck_grp_attr_free(SCTP_BASE_INFO(sctbinfo).ipi_lock_grp_attr);
6957         lck_grp_free(SCTP_BASE_INFO(sctbinfo).ipi_lock_grp);
6958         lck_attr_free(SCTP_BASE_INFO(sctbinfo).ipi_lock_attr);
6959 #endif
6960 #endif
6961 #if defined(__Userspace__)
6962         SCTP_TIMERQ_LOCK_DESTROY();
6963         SCTP_ZONE_DESTROY(zone_mbuf);
6964         SCTP_ZONE_DESTROY(zone_clust);
6965         SCTP_ZONE_DESTROY(zone_ext_refcnt);
6966 #endif
6967         /* Get rid of other stuff too. */
6968         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6969                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6970         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6971                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6972         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6973                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6974
6975 #if defined(_WIN32) || defined(__FreeBSD__) || defined(__Userspace__)
6976         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6977         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6978         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6979         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6980         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6981         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6982         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6983         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6984         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6985 #endif
6986 #if defined(__FreeBSD__) && !defined(__Userspace__)
6987 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6988         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6989 #endif
6990 #endif
6991 }
6992
6993
6994 int
6995 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6996                               int offset, int limit,
6997                               struct sockaddr *src, struct sockaddr *dst,
6998                               struct sockaddr *altsa, uint16_t port)
6999 {
7000         /*
7001          * grub through the INIT pulling addresses and loading them to the
7002          * nets structure in the asoc. The from address in the mbuf should
7003          * also be loaded (if it is not already). This routine can be called
7004          * with either INIT or INIT-ACK's as long as the m points to the IP
7005          * packet and the offset points to the beginning of the parameters.
7006          */
7007         struct sctp_inpcb *inp;
7008         struct sctp_nets *net, *nnet, *net_tmp;
7009         struct sctp_paramhdr *phdr, param_buf;
7010         struct sctp_tcb *stcb_tmp;
7011         uint16_t ptype, plen;
7012         struct sockaddr *sa;
7013         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
7014         struct sctp_auth_random *p_random = NULL;
7015         uint16_t random_len = 0;
7016         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
7017         struct sctp_auth_hmac_algo *hmacs = NULL;
7018         uint16_t hmacs_len = 0;
7019         uint8_t saw_asconf = 0;
7020         uint8_t saw_asconf_ack = 0;
7021         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
7022         struct sctp_auth_chunk_list *chunks = NULL;
7023         uint16_t num_chunks = 0;
7024         sctp_key_t *new_key;
7025         uint32_t keylen;
7026         int got_random = 0, got_hmacs = 0, got_chklist = 0;
7027         uint8_t peer_supports_ecn;
7028         uint8_t peer_supports_prsctp;
7029         uint8_t peer_supports_auth;
7030         uint8_t peer_supports_asconf;
7031         uint8_t peer_supports_asconf_ack;
7032         uint8_t peer_supports_reconfig;
7033         uint8_t peer_supports_nrsack;
7034         uint8_t peer_supports_pktdrop;
7035         uint8_t peer_supports_idata;
7036 #ifdef INET
7037         struct sockaddr_in sin;
7038 #endif
7039 #ifdef INET6
7040         struct sockaddr_in6 sin6;
7041 #endif
7042
7043         /* First get the destination address setup too. */
7044 #ifdef INET
7045         memset(&sin, 0, sizeof(sin));
7046         sin.sin_family = AF_INET;
7047 #ifdef HAVE_SIN_LEN
7048         sin.sin_len = sizeof(sin);
7049 #endif
7050         sin.sin_port = stcb->rport;
7051 #endif
7052 #ifdef INET6
7053         memset(&sin6, 0, sizeof(sin6));
7054         sin6.sin6_family = AF_INET6;
7055 #ifdef HAVE_SIN6_LEN
7056         sin6.sin6_len = sizeof(struct sockaddr_in6);
7057 #endif
7058         sin6.sin6_port = stcb->rport;
7059 #endif
7060         if (altsa) {
7061                 sa = altsa;
7062         } else {
7063                 sa = src;
7064         }
7065         peer_supports_idata = 0;
7066         peer_supports_ecn = 0;
7067         peer_supports_prsctp = 0;
7068         peer_supports_auth = 0;
7069         peer_supports_asconf = 0;
7070         peer_supports_reconfig = 0;
7071         peer_supports_nrsack = 0;
7072         peer_supports_pktdrop = 0;
7073         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
7074                 /* mark all addresses that we have currently on the list */
7075                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
7076         }
7077         /* does the source address already exist? if so skip it */
7078         inp = stcb->sctp_ep;
7079         atomic_add_int(&stcb->asoc.refcnt, 1);
7080         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
7081         atomic_add_int(&stcb->asoc.refcnt, -1);
7082
7083         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
7084                 /* we must add the source address */
7085                 /* no scope set here since we have a tcb already. */
7086                 switch (sa->sa_family) {
7087 #ifdef INET
7088                 case AF_INET:
7089                         if (stcb->asoc.scope.ipv4_addr_legal) {
7090                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
7091                                         return (-1);
7092                                 }
7093                         }
7094                         break;
7095 #endif
7096 #ifdef INET6
7097                 case AF_INET6:
7098                         if (stcb->asoc.scope.ipv6_addr_legal) {
7099                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
7100                                         return (-2);
7101                                 }
7102                         }
7103                         break;
7104 #endif
7105 #if defined(__Userspace__)
7106                 case AF_CONN:
7107                         if (stcb->asoc.scope.conn_addr_legal) {
7108                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
7109                                         return (-2);
7110                                 }
7111                         }
7112                         break;
7113 #endif
7114                 default:
7115                         break;
7116                 }
7117         } else {
7118                 if (net_tmp != NULL && stcb_tmp == stcb) {
7119                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
7120                 } else if (stcb_tmp != stcb) {
7121                         /* It belongs to another association? */
7122                         if (stcb_tmp)
7123                                 SCTP_TCB_UNLOCK(stcb_tmp);
7124                         return (-3);
7125                 }
7126         }
7127         if (stcb->asoc.state == 0) {
7128                 /* the assoc was freed? */
7129                 return (-4);
7130         }
7131         /* now we must go through each of the params. */
7132         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
7133         while (phdr) {
7134                 ptype = ntohs(phdr->param_type);
7135                 plen = ntohs(phdr->param_length);
7136                 /*
7137                  * SCTP_PRINTF("ptype => %0x, plen => %d\n", (uint32_t)ptype,
7138                  * (int)plen);
7139                  */
7140                 if (offset + plen > limit) {
7141                         break;
7142                 }
7143                 if (plen < sizeof(struct sctp_paramhdr)) {
7144                         break;
7145                 }
7146 #ifdef INET
7147                 if (ptype == SCTP_IPV4_ADDRESS) {
7148                         if (stcb->asoc.scope.ipv4_addr_legal) {
7149                                 struct sctp_ipv4addr_param *p4, p4_buf;
7150
7151                                 /* ok get the v4 address and check/add */
7152                                 phdr = sctp_get_next_param(m, offset,
7153                                                            (struct sctp_paramhdr *)&p4_buf,
7154                                                            sizeof(p4_buf));
7155                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
7156                                     phdr == NULL) {
7157                                         return (-5);
7158                                 }
7159                                 p4 = (struct sctp_ipv4addr_param *)phdr;
7160                                 sin.sin_addr.s_addr = p4->addr;
7161                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
7162                                         /* Skip multi-cast addresses */
7163                                         goto next_param;
7164                                 }
7165                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
7166                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
7167                                         goto next_param;
7168                                 }
7169                                 sa = (struct sockaddr *)&sin;
7170                                 inp = stcb->sctp_ep;
7171                                 atomic_add_int(&stcb->asoc.refcnt, 1);
7172                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
7173                                                                         dst, stcb);
7174                                 atomic_add_int(&stcb->asoc.refcnt, -1);
7175
7176                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
7177                                     inp == NULL) {
7178                                         /* we must add the source address */
7179                                         /*
7180                                          * no scope set since we have a tcb
7181                                          * already
7182                                          */
7183
7184                                         /*
7185                                          * we must validate the state again
7186                                          * here
7187                                          */
7188                                 add_it_now:
7189                                         if (stcb->asoc.state == 0) {
7190                                                 /* the assoc was freed? */
7191                                                 return (-7);
7192                                         }
7193                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
7194                                                 return (-8);
7195                                         }
7196                                 } else if (stcb_tmp == stcb) {
7197                                         if (stcb->asoc.state == 0) {
7198                                                 /* the assoc was freed? */
7199                                                 return (-10);
7200                                         }
7201                                         if (net != NULL) {
7202                                                 /* clear flag */
7203                                                 net->dest_state &=
7204                                                         ~SCTP_ADDR_NOT_IN_ASSOC;
7205                                         }
7206                                 } else {
7207                                         /*
7208                                          * strange, address is in another
7209                                          * assoc? straighten out locks.
7210                                          */
7211                                         if (stcb_tmp) {
7212                                                 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
7213                                                         struct mbuf *op_err;
7214                                                         char msg[SCTP_DIAG_INFO_LEN];
7215
7216                                                         /* in setup state we abort this guy */
7217                                                         SCTP_SNPRINTF(msg, sizeof(msg),
7218                                                                       "%s:%d at %s", __FILE__, __LINE__, __func__);
7219                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
7220                                                                  msg);
7221                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
7222                                                                                   stcb_tmp, op_err,
7223                                                                                   SCTP_SO_NOT_LOCKED);
7224                                                         goto add_it_now;
7225                                                 }
7226                                                 SCTP_TCB_UNLOCK(stcb_tmp);
7227                                         }
7228
7229                                         if (stcb->asoc.state == 0) {
7230                                                 /* the assoc was freed? */
7231                                                 return (-12);
7232                                         }
7233                                         return (-13);
7234                                 }
7235                         }
7236                 } else
7237 #endif
7238 #ifdef INET6
7239                 if (ptype == SCTP_IPV6_ADDRESS) {
7240                         if (stcb->asoc.scope.ipv6_addr_legal) {
7241                                 /* ok get the v6 address and check/add */
7242                                 struct sctp_ipv6addr_param *p6, p6_buf;
7243
7244                                 phdr = sctp_get_next_param(m, offset,
7245                                                            (struct sctp_paramhdr *)&p6_buf,
7246                                                            sizeof(p6_buf));
7247                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
7248                                     phdr == NULL) {
7249                                         return (-14);
7250                                 }
7251                                 p6 = (struct sctp_ipv6addr_param *)phdr;
7252                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
7253                                        sizeof(p6->addr));
7254                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
7255                                         /* Skip multi-cast addresses */
7256                                         goto next_param;
7257                                 }
7258                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
7259                                         /* Link local make no sense without scope */
7260                                         goto next_param;
7261                                 }
7262                                 sa = (struct sockaddr *)&sin6;
7263                                 inp = stcb->sctp_ep;
7264                                 atomic_add_int(&stcb->asoc.refcnt, 1);
7265                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
7266                                                                         dst, stcb);
7267                                 atomic_add_int(&stcb->asoc.refcnt, -1);
7268                                 if (stcb_tmp == NULL &&
7269                                     (inp == stcb->sctp_ep || inp == NULL)) {
7270                                         /*
7271                                          * we must validate the state again
7272                                          * here
7273                                          */
7274                                 add_it_now6:
7275                                         if (stcb->asoc.state == 0) {
7276                                                 /* the assoc was freed? */
7277                                                 return (-16);
7278                                         }
7279                                         /*
7280                                          * we must add the address, no scope
7281                                          * set
7282                                          */
7283                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
7284                                                 return (-17);
7285                                         }
7286                                 } else if (stcb_tmp == stcb) {
7287                                         /*
7288                                          * we must validate the state again
7289                                          * here
7290                                          */
7291                                         if (stcb->asoc.state == 0) {
7292                                                 /* the assoc was freed? */
7293                                                 return (-19);
7294                                         }
7295                                         if (net != NULL) {
7296                                                 /* clear flag */
7297                                                 net->dest_state &=
7298                                                         ~SCTP_ADDR_NOT_IN_ASSOC;
7299                                         }
7300                                 } else {
7301                                         /*
7302                                          * strange, address is in another
7303                                          * assoc? straighten out locks.
7304                                          */
7305                                         if (stcb_tmp) {
7306                                                 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
7307                                                         struct mbuf *op_err;
7308                                                         char msg[SCTP_DIAG_INFO_LEN];
7309
7310                                                         /* in setup state we abort this guy */
7311                                                         SCTP_SNPRINTF(msg, sizeof(msg),
7312                                                                       "%s:%d at %s", __FILE__, __LINE__, __func__);
7313                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
7314                                                                  msg);
7315                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
7316                                                                                   stcb_tmp, op_err,
7317                                                                                   SCTP_SO_NOT_LOCKED);
7318                                                         goto add_it_now6;
7319                                                 }
7320                                                 SCTP_TCB_UNLOCK(stcb_tmp);
7321                                         }
7322                                         if (stcb->asoc.state == 0) {
7323                                                 /* the assoc was freed? */
7324                                                 return (-21);
7325                                         }
7326                                         return (-22);
7327                                 }
7328                         }
7329                 } else
7330 #endif
7331                 if (ptype == SCTP_ECN_CAPABLE) {
7332                         peer_supports_ecn = 1;
7333                 } else if (ptype == SCTP_ULP_ADAPTATION) {
7334                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
7335                                 struct sctp_adaptation_layer_indication ai, *aip;
7336
7337                                 phdr = sctp_get_next_param(m, offset,
7338                                                            (struct sctp_paramhdr *)&ai, sizeof(ai));
7339                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
7340                                 if (aip) {
7341                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
7342                                         stcb->asoc.adaptation_needed = 1;
7343                                 }
7344                         }
7345                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
7346                         struct sctp_asconf_addr_param lstore, *fee;
7347                         int lptype;
7348                         struct sockaddr *lsa = NULL;
7349 #ifdef INET
7350                         struct sctp_asconf_addrv4_param *fii;
7351 #endif
7352
7353                         if (stcb->asoc.asconf_supported == 0) {
7354                                 return (-100);
7355                         }
7356                         if (plen > sizeof(lstore)) {
7357                                 return (-23);
7358                         }
7359                         if (plen < sizeof(struct sctp_asconf_addrv4_param)) {
7360                                 return (-101);
7361                         }
7362                         phdr = sctp_get_next_param(m, offset,
7363                                                    (struct sctp_paramhdr *)&lstore,
7364                                                    plen);
7365                         if (phdr == NULL) {
7366                                 return (-24);
7367                         }
7368                         fee = (struct sctp_asconf_addr_param *)phdr;
7369                         lptype = ntohs(fee->addrp.ph.param_type);
7370                         switch (lptype) {
7371 #ifdef INET
7372                         case SCTP_IPV4_ADDRESS:
7373                                 if (plen !=
7374                                     sizeof(struct sctp_asconf_addrv4_param)) {
7375                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
7376                                                     (int)sizeof(struct sctp_asconf_addrv4_param),
7377                                                     plen);
7378                                 } else {
7379                                         fii = (struct sctp_asconf_addrv4_param *)fee;
7380                                         sin.sin_addr.s_addr = fii->addrp.addr;
7381                                         lsa = (struct sockaddr *)&sin;
7382                                 }
7383                                 break;
7384 #endif
7385 #ifdef INET6
7386                         case SCTP_IPV6_ADDRESS:
7387                                 if (plen !=
7388                                     sizeof(struct sctp_asconf_addr_param)) {
7389                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
7390                                                     (int)sizeof(struct sctp_asconf_addr_param),
7391                                                     plen);
7392                                 } else {
7393                                         memcpy(sin6.sin6_addr.s6_addr,
7394                                                fee->addrp.addr,
7395                                                sizeof(fee->addrp.addr));
7396                                         lsa = (struct sockaddr *)&sin6;
7397                                 }
7398                                 break;
7399 #endif
7400                         default:
7401                                 break;
7402                         }
7403                         if (lsa) {
7404                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
7405                         }
7406                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
7407                         stcb->asoc.peer_supports_nat = 1;
7408                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
7409                         /* Peer supports pr-sctp */
7410                         peer_supports_prsctp = 1;
7411                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
7412                         /* A supported extension chunk */
7413                         struct sctp_supported_chunk_types_param *pr_supported;
7414                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
7415                         int num_ent, i;
7416
7417                         if (plen > sizeof(local_store)) {
7418                                 return (-35);
7419                         }
7420                         phdr = sctp_get_next_param(m, offset,
7421                                                    (struct sctp_paramhdr *)&local_store, plen);
7422                         if (phdr == NULL) {
7423                                 return (-25);
7424                         }
7425                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
7426                         num_ent = plen - sizeof(struct sctp_paramhdr);
7427                         for (i = 0; i < num_ent; i++) {
7428                                 switch (pr_supported->chunk_types[i]) {
7429                                 case SCTP_ASCONF:
7430                                         peer_supports_asconf = 1;
7431                                         break;
7432                                 case SCTP_ASCONF_ACK:
7433                                         peer_supports_asconf_ack = 1;
7434                                         break;
7435                                 case SCTP_FORWARD_CUM_TSN:
7436                                         peer_supports_prsctp = 1;
7437                                         break;
7438                                 case SCTP_PACKET_DROPPED:
7439                                         peer_supports_pktdrop = 1;
7440                                         break;
7441                                 case SCTP_NR_SELECTIVE_ACK:
7442                                         peer_supports_nrsack = 1;
7443                                         break;
7444                                 case SCTP_STREAM_RESET:
7445                                         peer_supports_reconfig = 1;
7446                                         break;
7447                                 case SCTP_AUTHENTICATION:
7448                                         peer_supports_auth = 1;
7449                                         break;
7450                                 case SCTP_IDATA:
7451                                         peer_supports_idata = 1;
7452                                         break;
7453                                 default:
7454                                         /* one I have not learned yet */
7455                                         break;
7456
7457                                 }
7458                         }
7459                 } else if (ptype == SCTP_RANDOM) {
7460                         if (plen > sizeof(random_store))
7461                                 break;
7462                         if (got_random) {
7463                                 /* already processed a RANDOM */
7464                                 goto next_param;
7465                         }
7466                         phdr = sctp_get_next_param(m, offset,
7467                                                    (struct sctp_paramhdr *)random_store,
7468                                                    plen);
7469                         if (phdr == NULL)
7470                                 return (-26);
7471                         p_random = (struct sctp_auth_random *)phdr;
7472                         random_len = plen - sizeof(*p_random);
7473                         /* enforce the random length */
7474                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
7475                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
7476                                 return (-27);
7477                         }
7478                         got_random = 1;
7479                 } else if (ptype == SCTP_HMAC_LIST) {
7480                         uint16_t num_hmacs;
7481                         uint16_t i;
7482
7483                         if (plen > sizeof(hmacs_store))
7484                                 break;
7485                         if (got_hmacs) {
7486                                 /* already processed a HMAC list */
7487                                 goto next_param;
7488                         }
7489                         phdr = sctp_get_next_param(m, offset,
7490                                                    (struct sctp_paramhdr *)hmacs_store,
7491                                                    plen);
7492                         if (phdr == NULL)
7493                                 return (-28);
7494                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
7495                         hmacs_len = plen - sizeof(*hmacs);
7496                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
7497                         /* validate the hmac list */
7498                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
7499                                 return (-29);
7500                         }
7501                         if (stcb->asoc.peer_hmacs != NULL)
7502                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
7503                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
7504                         if (stcb->asoc.peer_hmacs != NULL) {
7505                                 for (i = 0; i < num_hmacs; i++) {
7506                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
7507                                                                    ntohs(hmacs->hmac_ids[i]));
7508                                 }
7509                         }
7510                         got_hmacs = 1;
7511                 } else if (ptype == SCTP_CHUNK_LIST) {
7512                         int i;
7513
7514                         if (plen > sizeof(chunks_store))
7515                                 break;
7516                         if (got_chklist) {
7517                                 /* already processed a Chunks list */
7518                                 goto next_param;
7519                         }
7520                         phdr = sctp_get_next_param(m, offset,
7521                                                    (struct sctp_paramhdr *)chunks_store,
7522                                                    plen);
7523                         if (phdr == NULL)
7524                                 return (-30);
7525                         chunks = (struct sctp_auth_chunk_list *)phdr;
7526                         num_chunks = plen - sizeof(*chunks);
7527                         if (stcb->asoc.peer_auth_chunks != NULL)
7528                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
7529                         else
7530                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
7531                         for (i = 0; i < num_chunks; i++) {
7532                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
7533                                                           stcb->asoc.peer_auth_chunks);
7534                                 /* record asconf/asconf-ack if listed */
7535                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
7536                                         saw_asconf = 1;
7537                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
7538                                         saw_asconf_ack = 1;
7539
7540                         }
7541                         got_chklist = 1;
7542                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
7543                            (ptype == SCTP_STATE_COOKIE) ||
7544                            (ptype == SCTP_UNRECOG_PARAM) ||
7545                            (ptype == SCTP_COOKIE_PRESERVE) ||
7546                            (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
7547                            (ptype == SCTP_ADD_IP_ADDRESS) ||
7548                            (ptype == SCTP_DEL_IP_ADDRESS) ||
7549                            (ptype == SCTP_ERROR_CAUSE_IND) ||
7550                            (ptype == SCTP_SUCCESS_REPORT)) {
7551                         /* don't care */ ;
7552                 } else {
7553                         if ((ptype & 0x8000) == 0x0000) {
7554                                 /*
7555                                  * must stop processing the rest of the
7556                                  * param's. Any report bits were handled
7557                                  * with the call to
7558                                  * sctp_arethere_unrecognized_parameters()
7559                                  * when the INIT or INIT-ACK was first seen.
7560                                  */
7561                                 break;
7562                         }
7563                 }
7564
7565         next_param:
7566                 offset += SCTP_SIZE32(plen);
7567                 if (offset >= limit) {
7568                         break;
7569                 }
7570                 phdr = sctp_get_next_param(m, offset, &param_buf,
7571                                            sizeof(param_buf));
7572         }
7573         /* Now check to see if we need to purge any addresses */
7574         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
7575                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
7576                     SCTP_ADDR_NOT_IN_ASSOC) {
7577                         /* This address has been removed from the asoc */
7578                         /* remove and free it */
7579                         stcb->asoc.numnets--;
7580                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
7581                         sctp_free_remote_addr(net);
7582                         if (net == stcb->asoc.primary_destination) {
7583                                 stcb->asoc.primary_destination = NULL;
7584                                 sctp_select_primary_destination(stcb);
7585                         }
7586                 }
7587         }
7588         if ((stcb->asoc.ecn_supported == 1) &&
7589             (peer_supports_ecn == 0)) {
7590                 stcb->asoc.ecn_supported = 0;
7591         }
7592         if ((stcb->asoc.prsctp_supported == 1) &&
7593             (peer_supports_prsctp == 0)) {
7594                 stcb->asoc.prsctp_supported = 0;
7595         }
7596         if ((stcb->asoc.auth_supported == 1) &&
7597             ((peer_supports_auth == 0) ||
7598              (got_random == 0) || (got_hmacs == 0))) {
7599                 stcb->asoc.auth_supported = 0;
7600         }
7601         if ((stcb->asoc.asconf_supported == 1) &&
7602             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
7603              (stcb->asoc.auth_supported == 0) ||
7604              (saw_asconf == 0) || (saw_asconf_ack == 0))) {
7605                 stcb->asoc.asconf_supported = 0;
7606         }
7607         if ((stcb->asoc.reconfig_supported == 1) &&
7608             (peer_supports_reconfig == 0)) {
7609                 stcb->asoc.reconfig_supported = 0;
7610         }
7611         if ((stcb->asoc.idata_supported == 1) &&
7612             (peer_supports_idata == 0)) {
7613                 stcb->asoc.idata_supported = 0;
7614         }
7615         if ((stcb->asoc.nrsack_supported == 1) &&
7616             (peer_supports_nrsack == 0)) {
7617                 stcb->asoc.nrsack_supported = 0;
7618         }
7619         if ((stcb->asoc.pktdrop_supported == 1) &&
7620             (peer_supports_pktdrop == 0)){
7621                 stcb->asoc.pktdrop_supported = 0;
7622         }
7623         /* validate authentication required parameters */
7624         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
7625                 /* peer does not support auth but sent a chunks list? */
7626                 return (-31);
7627         }
7628         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
7629                 /* peer supports asconf but not auth? */
7630                 return (-32);
7631         } else if ((peer_supports_asconf == 1) &&
7632                    (peer_supports_auth == 1) &&
7633                    ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
7634                 return (-33);
7635         }
7636         /* concatenate the full random key */
7637         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
7638         if (chunks != NULL) {
7639                 keylen += sizeof(*chunks) + num_chunks;
7640         }
7641         new_key = sctp_alloc_key(keylen);
7642         if (new_key != NULL) {
7643                 /* copy in the RANDOM */
7644                 if (p_random != NULL) {
7645                         keylen = sizeof(*p_random) + random_len;
7646                         memcpy(new_key->key, p_random, keylen);
7647                 } else {
7648                         keylen = 0;
7649                 }
7650                 /* append in the AUTH chunks */
7651                 if (chunks != NULL) {
7652                         memcpy(new_key->key + keylen, chunks,
7653                                sizeof(*chunks) + num_chunks);
7654                         keylen += sizeof(*chunks) + num_chunks;
7655                 }
7656                 /* append in the HMACs */
7657                 if (hmacs != NULL) {
7658                         memcpy(new_key->key + keylen, hmacs,
7659                                sizeof(*hmacs) + hmacs_len);
7660                 }
7661         } else {
7662                 /* failed to get memory for the key */
7663                 return (-34);
7664         }
7665         if (stcb->asoc.authinfo.peer_random != NULL)
7666                 sctp_free_key(stcb->asoc.authinfo.peer_random);
7667         stcb->asoc.authinfo.peer_random = new_key;
7668         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
7669         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
7670
7671         return (0);
7672 }
7673
7674 int
7675 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
7676                       struct sctp_nets *net)
7677 {
7678         /* make sure the requested primary address exists in the assoc */
7679         if (net == NULL && sa)
7680                 net = sctp_findnet(stcb, sa);
7681
7682         if (net == NULL) {
7683                 /* didn't find the requested primary address! */
7684                 return (-1);
7685         } else {
7686                 /* set the primary address */
7687                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
7688                         /* Must be confirmed, so queue to set */
7689                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
7690                         return (0);
7691                 }
7692                 stcb->asoc.primary_destination = net;
7693                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
7694                         sctp_free_remote_addr(stcb->asoc.alternate);
7695                         stcb->asoc.alternate = NULL;
7696                 }
7697                 net = TAILQ_FIRST(&stcb->asoc.nets);
7698                 if (net != stcb->asoc.primary_destination) {
7699                         /* first one on the list is NOT the primary
7700                          * sctp_cmpaddr() is much more efficient if
7701                          * the primary is the first on the list, make it
7702                          * so.
7703                          */
7704                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
7705                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
7706                 }
7707                 return (0);
7708         }
7709 }
7710
7711 int
7712 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
7713 {
7714         /*
7715          * This function serves two purposes. It will see if a TAG can be
7716          * re-used and return 1 for yes it is ok and 0 for don't use that
7717          * tag. A secondary function it will do is purge out old tags that
7718          * can be removed.
7719          */
7720         struct sctpvtaghead *chain;
7721         struct sctp_tagblock *twait_block;
7722         struct sctpasochead *head;
7723         struct sctp_tcb *stcb;
7724         int i;
7725
7726         SCTP_INP_INFO_RLOCK();
7727         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
7728                                                                 SCTP_BASE_INFO(hashasocmark))];
7729         LIST_FOREACH(stcb, head, sctp_asocs) {
7730                 /* We choose not to lock anything here. TCB's can't be
7731                  * removed since we have the read lock, so they can't
7732                  * be freed on us, same thing for the INP. I may
7733                  * be wrong with this assumption, but we will go
7734                  * with it for now :-)
7735                  */
7736                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
7737                         continue;
7738                 }
7739                 if (stcb->asoc.my_vtag == tag) {
7740                         /* candidate */
7741                         if (stcb->rport != rport) {
7742                                 continue;
7743                         }
7744                         if (stcb->sctp_ep->sctp_lport != lport) {
7745                                 continue;
7746                         }
7747                         /* Its a used tag set */
7748                         SCTP_INP_INFO_RUNLOCK();
7749                         return (0);
7750                 }
7751         }
7752         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
7753         /* Now what about timed wait ? */
7754         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
7755                 /*
7756                  * Block(s) are present, lets see if we have this tag in the
7757                  * list
7758                  */
7759                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
7760                         if (twait_block->vtag_block[i].v_tag == 0) {
7761                                 /* not used */
7762                                 continue;
7763                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire  <
7764                                    now->tv_sec) {
7765                                 /* Audit expires this guy */
7766                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
7767                                 twait_block->vtag_block[i].v_tag = 0;
7768                                 twait_block->vtag_block[i].lport = 0;
7769                                 twait_block->vtag_block[i].rport = 0;
7770                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
7771                                    (twait_block->vtag_block[i].lport == lport) &&
7772                                    (twait_block->vtag_block[i].rport == rport)) {
7773                                 /* Bad tag, sorry :< */
7774                                 SCTP_INP_INFO_RUNLOCK();
7775                                 return (0);
7776                         }
7777                 }
7778         }
7779         SCTP_INP_INFO_RUNLOCK();
7780         return (1);
7781 }
7782
7783 static void
7784 sctp_drain_mbufs(struct sctp_tcb *stcb)
7785 {
7786         /*
7787          * We must hunt this association for MBUF's past the cumack (i.e.
7788          * out of order data that we can renege on).
7789          */
7790         struct sctp_association *asoc;
7791         struct sctp_tmit_chunk *chk, *nchk;
7792         uint32_t cumulative_tsn_p1;
7793         struct sctp_queued_to_read *control, *ncontrol;
7794         int cnt, strmat;
7795         uint32_t gap, i;
7796         int fnd = 0;
7797
7798         /* We look for anything larger than the cum-ack + 1 */
7799
7800         asoc = &stcb->asoc;
7801         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
7802                 /* none we can reneg on. */
7803                 return;
7804         }
7805         SCTP_STAT_INCR(sctps_protocol_drains_done);
7806         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
7807         cnt = 0;
7808         /* Ok that was fun, now we will drain all the inbound streams? */
7809         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
7810                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) {
7811 #ifdef INVARIANTS
7812                         if (control->on_strm_q != SCTP_ON_ORDERED ) {
7813                                 panic("Huh control: %p on_q: %d -- not ordered?",
7814                                       control, control->on_strm_q);
7815                         }
7816 #endif
7817                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
7818                                 /* Yep it is above cum-ack */
7819                                 cnt++;
7820                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
7821                                 KASSERT(control->length > 0, ("control has zero length"));
7822                                 if (asoc->size_on_all_streams >= control->length) {
7823                                         asoc->size_on_all_streams -= control->length;
7824                                 } else {
7825 #ifdef INVARIANTS
7826                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
7827 #else
7828                                         asoc->size_on_all_streams = 0;
7829 #endif
7830                                 }
7831                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
7832                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
7833                                 if (control->on_read_q) {
7834                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
7835                                         control->on_read_q = 0;
7836                                 }
7837                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm);
7838                                 control->on_strm_q = 0;
7839                                 if (control->data) {
7840                                         sctp_m_freem(control->data);
7841                                         control->data = NULL;
7842                                 }
7843                                 sctp_free_remote_addr(control->whoFrom);
7844                                 /* Now its reasm? */
7845                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
7846                                         cnt++;
7847                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
7848                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
7849                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
7850                                                 asoc->size_on_reasm_queue -= chk->send_size;
7851                                         } else {
7852 #ifdef INVARIANTS
7853                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
7854 #else
7855                                                 asoc->size_on_reasm_queue = 0;
7856 #endif
7857                                         }
7858                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
7859                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
7860                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
7861                                         if (chk->data) {
7862                                                 sctp_m_freem(chk->data);
7863                                                 chk->data = NULL;
7864                                         }
7865                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
7866                                 }
7867                                 sctp_free_a_readq(stcb, control);
7868                         }
7869                 }
7870                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) {
7871 #ifdef INVARIANTS
7872                         if (control->on_strm_q != SCTP_ON_UNORDERED ) {
7873                                 panic("Huh control: %p on_q: %d -- not unordered?",
7874                                       control, control->on_strm_q);
7875                         }
7876 #endif
7877                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
7878                                 /* Yep it is above cum-ack */
7879                                 cnt++;
7880                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
7881                                 KASSERT(control->length > 0, ("control has zero length"));
7882                                 if (asoc->size_on_all_streams >= control->length) {
7883                                         asoc->size_on_all_streams -= control->length;
7884                                 } else {
7885 #ifdef INVARIANTS
7886                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
7887 #else
7888                                         asoc->size_on_all_streams = 0;
7889 #endif
7890                                 }
7891                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
7892                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
7893                                 if (control->on_read_q) {
7894                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
7895                                         control->on_read_q = 0;
7896                                 }
7897                                 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm);
7898                                 control->on_strm_q = 0;
7899                                 if (control->data) {
7900                                         sctp_m_freem(control->data);
7901                                         control->data = NULL;
7902                                 }
7903                                 sctp_free_remote_addr(control->whoFrom);
7904                                 /* Now its reasm? */
7905                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
7906                                         cnt++;
7907                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
7908                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
7909                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
7910                                                 asoc->size_on_reasm_queue -= chk->send_size;
7911                                         } else {
7912 #ifdef INVARIANTS
7913                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
7914 #else
7915                                                 asoc->size_on_reasm_queue = 0;
7916 #endif
7917                                         }
7918                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
7919                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
7920                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
7921                                         if (chk->data) {
7922                                                 sctp_m_freem(chk->data);
7923                                                 chk->data = NULL;
7924                                         }
7925                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
7926                                 }
7927                                 sctp_free_a_readq(stcb, control);
7928                         }
7929                 }
7930         }
7931         if (cnt) {
7932                 /* We must back down to see what the new highest is */
7933                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
7934                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
7935                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
7936                                 asoc->highest_tsn_inside_map = i;
7937                                 fnd = 1;
7938                                 break;
7939                         }
7940                 }
7941                 if (!fnd) {
7942                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
7943                 }
7944
7945                 /*
7946                  * Question, should we go through the delivery queue? The only
7947                  * reason things are on here is the app not reading OR a p-d-api up.
7948                  * An attacker COULD send enough in to initiate the PD-API and then
7949                  * send a bunch of stuff to other streams... these would wind up on
7950                  * the delivery queue.. and then we would not get to them. But in
7951                  * order to do this I then have to back-track and un-deliver
7952                  * sequence numbers in streams.. el-yucko. I think for now we will
7953                  * NOT look at the delivery queue and leave it to be something to
7954                  * consider later. An alternative would be to abort the P-D-API with
7955                  * a notification and then deliver the data.... Or another method
7956                  * might be to keep track of how many times the situation occurs and
7957                  * if we see a possible attack underway just abort the association.
7958                  */
7959 #ifdef SCTP_DEBUG
7960                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
7961 #endif
7962                 /*
7963                  * Now do we need to find a new
7964                  * asoc->highest_tsn_inside_map?
7965                  */
7966                 asoc->last_revoke_count = cnt;
7967                 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
7968                                 SCTP_FROM_SCTP_PCB + SCTP_LOC_11);
7969                 /*sa_ignore NO_NULL_CHK*/
7970                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
7971                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
7972         }
7973         /*
7974          * Another issue, in un-setting the TSN's in the mapping array we
7975          * DID NOT adjust the highest_tsn marker.  This will cause one of two
7976          * things to occur. It may cause us to do extra work in checking for
7977          * our mapping array movement. More importantly it may cause us to
7978          * SACK every datagram. This may not be a bad thing though since we
7979          * will recover once we get our cum-ack above and all this stuff we
7980          * dumped recovered.
7981          */
7982 }
7983
7984 void
7985 sctp_drain()
7986 {
7987         /*
7988          * We must walk the PCB lists for ALL associations here. The system
7989          * is LOW on MBUF's and needs help. This is where reneging will
7990          * occur. We really hope this does NOT happen!
7991          */
7992 #if defined(__FreeBSD__) && !defined(__Userspace__)
7993         VNET_ITERATOR_DECL(vnet_iter);
7994 #else
7995         struct sctp_inpcb *inp;
7996         struct sctp_tcb *stcb;
7997
7998         SCTP_STAT_INCR(sctps_protocol_drain_calls);
7999         if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
8000                 return;
8001         }
8002 #endif
8003 #if defined(__FreeBSD__) && !defined(__Userspace__)
8004         VNET_LIST_RLOCK_NOSLEEP();
8005         VNET_FOREACH(vnet_iter) {
8006                 CURVNET_SET(vnet_iter);
8007                 struct sctp_inpcb *inp;
8008                 struct sctp_tcb *stcb;
8009 #endif
8010
8011 #if defined(__FreeBSD__) && !defined(__Userspace__)
8012                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
8013                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
8014 #ifdef VIMAGE
8015                         continue;
8016 #else
8017                         return;
8018 #endif
8019                 }
8020 #endif
8021                 SCTP_INP_INFO_RLOCK();
8022                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
8023                         /* For each endpoint */
8024                         SCTP_INP_RLOCK(inp);
8025                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
8026                                 /* For each association */
8027                                 SCTP_TCB_LOCK(stcb);
8028                                 sctp_drain_mbufs(stcb);
8029                                 SCTP_TCB_UNLOCK(stcb);
8030                         }
8031                         SCTP_INP_RUNLOCK(inp);
8032                 }
8033                 SCTP_INP_INFO_RUNLOCK();
8034 #if defined(__FreeBSD__) && !defined(__Userspace__)
8035                 CURVNET_RESTORE();
8036         }
8037         VNET_LIST_RUNLOCK_NOSLEEP();
8038 #endif
8039 }
8040
8041 /*
8042  * start a new iterator
8043  * iterates through all endpoints and associations based on the pcb_state
8044  * flags and asoc_state.  "af" (mandatory) is executed for all matching
8045  * assocs and "ef" (optional) is executed when the iterator completes.
8046  * "inpf" (optional) is executed for each new endpoint as it is being
8047  * iterated through. inpe (optional) is called when the inp completes
8048  * its way through all the stcbs.
8049  */
8050 int
8051 sctp_initiate_iterator(inp_func inpf,
8052                        asoc_func af,
8053                        inp_func inpe,
8054                        uint32_t pcb_state,
8055                        uint32_t pcb_features,
8056                        uint32_t asoc_state,
8057                        void *argp,
8058                        uint32_t argi,
8059                        end_func ef,
8060                        struct sctp_inpcb *s_inp,
8061                        uint8_t chunk_output_off)
8062 {
8063         struct sctp_iterator *it = NULL;
8064
8065         if (af == NULL) {
8066                 return (-1);
8067         }
8068         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
8069                 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
8070                             SCTP_BASE_VAR(sctp_pcb_initialized));
8071                 return (-1);
8072         }
8073         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
8074                     SCTP_M_ITER);
8075         if (it == NULL) {
8076                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
8077                 return (-1);
8078         }
8079         memset(it, 0, sizeof(*it));
8080         it->function_assoc = af;
8081         it->function_inp = inpf;
8082         if (inpf)
8083                 it->done_current_ep = 0;
8084         else
8085                 it->done_current_ep = 1;
8086         it->function_atend = ef;
8087         it->pointer = argp;
8088         it->val = argi;
8089         it->pcb_flags = pcb_state;
8090         it->pcb_features = pcb_features;
8091         it->asoc_state = asoc_state;
8092         it->function_inp_end = inpe;
8093         it->no_chunk_output = chunk_output_off;
8094 #if defined(__FreeBSD__) && !defined(__Userspace__)
8095         it->vn = curvnet;
8096 #endif
8097         if (s_inp) {
8098                 /* Assume lock is held here */
8099                 it->inp = s_inp;
8100                 SCTP_INP_INCR_REF(it->inp);
8101                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
8102         } else {
8103                 SCTP_INP_INFO_RLOCK();
8104                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
8105                 if (it->inp) {
8106                         SCTP_INP_INCR_REF(it->inp);
8107                 }
8108                 SCTP_INP_INFO_RUNLOCK();
8109                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
8110
8111         }
8112         SCTP_IPI_ITERATOR_WQ_LOCK();
8113         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
8114                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
8115                 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
8116                             SCTP_BASE_VAR(sctp_pcb_initialized), it);
8117                 SCTP_FREE(it, SCTP_M_ITER);
8118                 return (-1);
8119         }
8120         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
8121         if (sctp_it_ctl.iterator_running == 0) {
8122                 sctp_wakeup_iterator();
8123         }
8124         SCTP_IPI_ITERATOR_WQ_UNLOCK();
8125         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
8126         return (0);
8127 }