sys/netinet/sctp_pcb.c

   1 /*-
   2  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
   3  * Copyright (c) 2008-2011, by Randall Stewart. All rights reserved.
   4  * Copyright (c) 2008-2011, by Michael Tuexen. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * a) Redistributions of source code must retain the above copyright notice,
  10  *   this list of conditions and the following disclaimer.
  11  *
  12  * b) Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *   the documentation and/or other materials provided with the distribution.
  15  *
  16  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  30  * THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 /* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $     */
  34
  35 #include <sys/cdefs.h>
  36 __FBSDID("$FreeBSD$");
  37
  38 #include <netinet/sctp_os.h>
  39 #include <sys/proc.h>
  40 #include <netinet/sctp_var.h>
  41 #include <netinet/sctp_sysctl.h>
  42 #include <netinet/sctp_pcb.h>
  43 #include <netinet/sctputil.h>
  44 #include <netinet/sctp.h>
  45 #include <netinet/sctp_header.h>
  46 #include <netinet/sctp_asconf.h>
  47 #include <netinet/sctp_output.h>
  48 #include <netinet/sctp_timer.h>
  49 #include <netinet/sctp_bsd_addr.h>
  50 #include <netinet/sctp_dtrace_define.h>
  51 #include <netinet/udp.h>
  52 #ifdef INET6
  53 #include <netinet6/ip6_var.h>
  54 #endif
  55 #include <sys/sched.h>
  56 #include <sys/smp.h>
  57 #include <sys/unistd.h>
  58
  59
  60 VNET_DEFINE(struct sctp_base_info, system_base_info);
  61
  62 /* FIX: we don't handle multiple link local scopes */
  63 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  64 #ifdef INET6
  65 int
  66 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  67 {
  68         struct sockaddr_in6 tmp_a, tmp_b;
  69
  70         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  71         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  72                 return 0;
  73         }
  74         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  75         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  76                 return 0;
  77         }
  78         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  79 }
  80
  81 #endif
  82
  83 void
  84 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  85 {
  86         /*
  87          * We really don't need to lock this, but I will just because it
  88          * does not hurt.
  89          */
  90         SCTP_INP_INFO_RLOCK();
  91         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  92         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  93         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  94         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  95         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  96         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  97         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  98         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
  99
 100         SCTP_INP_INFO_RUNLOCK();
 101 }
 102
 103 /*
 104  * Addresses are added to VRF's (Virtual Router's). For BSD we
 105  * have only the default VRF 0. We maintain a hash list of
 106  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
 107  * these has a list of addresses. When we add a new address
 108  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 109  * not exist we create it and add it to the list of IFN's
 110  * within the VRF. Once we have the sctp_ifn, we add the
 111  * address to the list. So we look something like:
 112  *
 113  * hash-vrf-table
 114  *   vrf-> ifn-> ifn -> ifn
 115  *   vrf    |
 116  *    ...   +--ifa-> ifa -> ifa
 117  *   vrf
 118  *
 119  * We keep these separate lists since the SCTP subsystem will
 120  * point to these from its source address selection nets structure.
 121  * When an address is deleted it does not happen right away on
 122  * the SCTP side, it gets scheduled. What we do when a
 123  * delete happens is immediately remove the address from
 124  * the master list and decrement the refcount. As our
 125  * addip iterator works through and frees the src address
 126  * selection pointing to the sctp_ifa, eventually the refcount
 127  * will reach 0 and we will delete it. Note that it is assumed
 128  * that any locking on system level ifn/ifa is done at the
 129  * caller of these functions and these routines will only
 130  * lock the SCTP structures as they add or delete things.
 131  *
 132  * Other notes on VRF concepts.
 133  *  - An endpoint can be in multiple VRF's
 134  *  - An association lives within a VRF and only one VRF.
 135  *  - Any incoming packet we can deduce the VRF for by
 136  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 137  *  - Any downward send call or connect call must supply the
 138  *    VRF via ancillary data or via some sort of set default
 139  *    VRF socket option call (again for BSD no brainer since
 140  *    the VRF is always 0).
 141  *  - An endpoint may add multiple VRF's to it.
 142  *  - Listening sockets can accept associations in any
 143  *    of the VRF's they are in but the assoc will end up
 144  *    in only one VRF (gotten from the packet or connect/send).
 145  *
 146  */
 147
 148 struct sctp_vrf *
 149 sctp_allocate_vrf(int vrf_id)
 150 {
 151         struct sctp_vrf *vrf = NULL;
 152         struct sctp_vrflist *bucket;
 153
 154         /* First allocate the VRF structure */
 155         vrf = sctp_find_vrf(vrf_id);
 156         if (vrf) {
 157                 /* Already allocated */
 158                 return (vrf);
 159         }
 160         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 161             SCTP_M_VRF);
 162         if (vrf == NULL) {
 163                 /* No memory */
 164 #ifdef INVARIANTS
 165                 panic("No memory for VRF:%d", vrf_id);
 166 #endif
 167                 return (NULL);
 168         }
 169         /* setup the VRF */
 170         memset(vrf, 0, sizeof(struct sctp_vrf));
 171         vrf->vrf_id = vrf_id;
 172         LIST_INIT(&vrf->ifnlist);
 173         vrf->total_ifa_count = 0;
 174         vrf->refcount = 0;
 175         /* now also setup table ids */
 176         SCTP_INIT_VRF_TABLEID(vrf);
 177         /* Init the HASH of addresses */
 178         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 179             &vrf->vrf_addr_hashmark);
 180         if (vrf->vrf_addr_hash == NULL) {
 181                 /* No memory */
 182 #ifdef INVARIANTS
 183                 panic("No memory for VRF:%d", vrf_id);
 184 #endif
 185                 SCTP_FREE(vrf, SCTP_M_VRF);
 186                 return (NULL);
 187         }
 188         /* Add it to the hash table */
 189         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 190         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 191         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 192         return (vrf);
 193 }
 194
 195
 196 struct sctp_ifn *
 197 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 198 {
 199         struct sctp_ifn *sctp_ifnp;
 200         struct sctp_ifnlist *hash_ifn_head;
 201
 202         /*
 203          * We assume the lock is held for the addresses if that's wrong
 204          * problems could occur :-)
 205          */
 206         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 207         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 208                 if (sctp_ifnp->ifn_index == ifn_index) {
 209                         return (sctp_ifnp);
 210                 }
 211                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 212                         return (sctp_ifnp);
 213                 }
 214         }
 215         return (NULL);
 216 }
 217
 218
 219
 220 struct sctp_vrf *
 221 sctp_find_vrf(uint32_t vrf_id)
 222 {
 223         struct sctp_vrflist *bucket;
 224         struct sctp_vrf *liste;
 225
 226         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 227         LIST_FOREACH(liste, bucket, next_vrf) {
 228                 if (vrf_id == liste->vrf_id) {
 229                         return (liste);
 230                 }
 231         }
 232         return (NULL);
 233 }
 234
 235 void
 236 sctp_free_vrf(struct sctp_vrf *vrf)
 237 {
 238         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 239                 if (vrf->vrf_addr_hash) {
 240                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 241                         vrf->vrf_addr_hash = NULL;
 242                 }
 243                 /* We zero'd the count */
 244                 LIST_REMOVE(vrf, next_vrf);
 245                 SCTP_FREE(vrf, SCTP_M_VRF);
 246                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 247         }
 248 }
 249
 250 void
 251 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 252 {
 253         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 254                 /* We zero'd the count */
 255                 if (sctp_ifnp->vrf) {
 256                         sctp_free_vrf(sctp_ifnp->vrf);
 257                 }
 258                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 259                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 260         }
 261 }
 262
 263 void
 264 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 265 {
 266         struct sctp_ifn *sctp_ifnp;
 267
 268         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 269         if (sctp_ifnp != NULL) {
 270                 sctp_ifnp->ifn_mtu = mtu;
 271         }
 272 }
 273
 274
 275 void
 276 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 277 {
 278         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 279                 /* We zero'd the count */
 280                 if (sctp_ifap->ifn_p) {
 281                         sctp_free_ifn(sctp_ifap->ifn_p);
 282                 }
 283                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 284                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 285         }
 286 }
 287
 288 static void
 289 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 290 {
 291         struct sctp_ifn *found;
 292
 293         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 294         if (found == NULL) {
 295                 /* Not in the list.. sorry */
 296                 return;
 297         }
 298         if (hold_addr_lock == 0)
 299                 SCTP_IPI_ADDR_WLOCK();
 300         LIST_REMOVE(sctp_ifnp, next_bucket);
 301         LIST_REMOVE(sctp_ifnp, next_ifn);
 302         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 303             sctp_ifnp->registered_af);
 304         if (hold_addr_lock == 0)
 305                 SCTP_IPI_ADDR_WUNLOCK();
 306         /* Take away the reference, and possibly free it */
 307         sctp_free_ifn(sctp_ifnp);
 308 }
 309
 310 void
 311 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 312     const char *if_name, uint32_t ifn_index)
 313 {
 314         struct sctp_vrf *vrf;
 315         struct sctp_ifa *sctp_ifap = NULL;
 316
 317         SCTP_IPI_ADDR_RLOCK();
 318         vrf = sctp_find_vrf(vrf_id);
 319         if (vrf == NULL) {
 320                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 321                 goto out;
 322
 323         }
 324         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 325         if (sctp_ifap == NULL) {
 326                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 327                 goto out;
 328         }
 329         if (sctp_ifap->ifn_p == NULL) {
 330                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 331                 goto out;
 332         }
 333         if (if_name) {
 334                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 335                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 336                             sctp_ifap->ifn_p->ifn_name, if_name);
 337                         goto out;
 338                 }
 339         } else {
 340                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 341                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 342                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 343                         goto out;
 344                 }
 345         }
 346
 347         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 348         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 349 out:
 350         SCTP_IPI_ADDR_RUNLOCK();
 351 }
 352
 353 void
 354 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 355     const char *if_name, uint32_t ifn_index)
 356 {
 357         struct sctp_vrf *vrf;
 358         struct sctp_ifa *sctp_ifap = NULL;
 359
 360         SCTP_IPI_ADDR_RLOCK();
 361         vrf = sctp_find_vrf(vrf_id);
 362         if (vrf == NULL) {
 363                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 364                 goto out;
 365
 366         }
 367         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 368         if (sctp_ifap == NULL) {
 369                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 370                 goto out;
 371         }
 372         if (sctp_ifap->ifn_p == NULL) {
 373                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 374                 goto out;
 375         }
 376         if (if_name) {
 377                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 378                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 379                             sctp_ifap->ifn_p->ifn_name, if_name);
 380                         goto out;
 381                 }
 382         } else {
 383                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 384                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 385                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 386                         goto out;
 387                 }
 388         }
 389
 390         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 391         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 392 out:
 393         SCTP_IPI_ADDR_RUNLOCK();
 394 }
 395
 396 /*-
 397  * Add an ifa to an ifn.
 398  * Register the interface as necessary.
 399  * NOTE: ADDR write lock MUST be held.
 400  */
 401 static void
 402 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 403 {
 404         int ifa_af;
 405
 406         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 407         sctp_ifap->ifn_p = sctp_ifnp;
 408         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 409         /* update address counts */
 410         sctp_ifnp->ifa_count++;
 411         ifa_af = sctp_ifap->address.sa.sa_family;
 412         switch (ifa_af) {
 413 #ifdef INET
 414         case AF_INET:
 415                 sctp_ifnp->num_v4++;
 416                 break;
 417 #endif
 418 #ifdef INET6
 419         case AF_INET6:
 420                 sctp_ifnp->num_v6++;
 421                 break;
 422 #endif
 423         default:
 424                 break;
 425         }
 426         if (sctp_ifnp->ifa_count == 1) {
 427                 /* register the new interface */
 428                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 429                 sctp_ifnp->registered_af = ifa_af;
 430         }
 431 }
 432
 433 /*-
 434  * Remove an ifa from its ifn.
 435  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 436  * the interface based on the remaining address families left.
 437  * NOTE: ADDR write lock MUST be held.
 438  */
 439 static void
 440 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 441 {
 442         uint32_t ifn_index;
 443
 444         LIST_REMOVE(sctp_ifap, next_ifa);
 445         if (sctp_ifap->ifn_p) {
 446                 /* update address counts */
 447                 sctp_ifap->ifn_p->ifa_count--;
 448                 switch (sctp_ifap->address.sa.sa_family) {
 449 #ifdef INET
 450                 case AF_INET:
 451                         sctp_ifap->ifn_p->num_v4--;
 452                         break;
 453 #endif
 454 #ifdef INET6
 455                 case AF_INET6:
 456                         sctp_ifap->ifn_p->num_v6--;
 457                         break;
 458 #endif
 459                 default:
 460                         break;
 461                 }
 462
 463                 ifn_index = sctp_ifap->ifn_p->ifn_index;
 464                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 465                         /* remove the ifn, possibly freeing it */
 466                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 467                 } else {
 468                         /* re-register address family type, if needed */
 469                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 470                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 471                                 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET6);
 472                                 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET);
 473                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 474                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 475                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 476                                 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET);
 477                                 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET6);
 478                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 479                         }
 480                         /* free the ifn refcount */
 481                         sctp_free_ifn(sctp_ifap->ifn_p);
 482                 }
 483                 sctp_ifap->ifn_p = NULL;
 484         }
 485 }
 486
 487 struct sctp_ifa *
 488 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 489     uint32_t ifn_type, const char *if_name, void *ifa,
 490     struct sockaddr *addr, uint32_t ifa_flags,
 491     int dynamic_add)
 492 {
 493         struct sctp_vrf *vrf;
 494         struct sctp_ifn *sctp_ifnp = NULL;
 495         struct sctp_ifa *sctp_ifap = NULL;
 496         struct sctp_ifalist *hash_addr_head;
 497         struct sctp_ifnlist *hash_ifn_head;
 498         uint32_t hash_of_addr;
 499         int new_ifn_af = 0;
 500
 501 #ifdef SCTP_DEBUG
 502         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 503         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 504 #endif
 505         SCTP_IPI_ADDR_WLOCK();
 506         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 507         if (sctp_ifnp) {
 508                 vrf = sctp_ifnp->vrf;
 509         } else {
 510                 vrf = sctp_find_vrf(vrf_id);
 511                 if (vrf == NULL) {
 512                         vrf = sctp_allocate_vrf(vrf_id);
 513                         if (vrf == NULL) {
 514                                 SCTP_IPI_ADDR_WUNLOCK();
 515                                 return (NULL);
 516                         }
 517                 }
 518         }
 519         if (sctp_ifnp == NULL) {
 520                 /*
 521                  * build one and add it, can't hold lock until after malloc
 522                  * done though.
 523                  */
 524                 SCTP_IPI_ADDR_WUNLOCK();
 525                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 526                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 527                 if (sctp_ifnp == NULL) {
 528 #ifdef INVARIANTS
 529                         panic("No memory for IFN");
 530 #endif
 531                         return (NULL);
 532                 }
 533                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 534                 sctp_ifnp->ifn_index = ifn_index;
 535                 sctp_ifnp->ifn_p = ifn;
 536                 sctp_ifnp->ifn_type = ifn_type;
 537                 sctp_ifnp->refcount = 0;
 538                 sctp_ifnp->vrf = vrf;
 539                 atomic_add_int(&vrf->refcount, 1);
 540                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 541                 if (if_name != NULL) {
 542                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
 543                 } else {
 544                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
 545                 }
 546                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 547                 LIST_INIT(&sctp_ifnp->ifalist);
 548                 SCTP_IPI_ADDR_WLOCK();
 549                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 550                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 551                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 552                 new_ifn_af = 1;
 553         }
 554         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 555         if (sctp_ifap) {
 556                 /* Hmm, it already exists? */
 557                 if ((sctp_ifap->ifn_p) &&
 558                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 559                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 560                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 561                             sctp_ifap);
 562                         if (new_ifn_af) {
 563                                 /* Remove the created one that we don't want */
 564                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 565                         }
 566                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 567                                 /* easy to solve, just switch back to active */
 568                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 569                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 570                                 sctp_ifap->ifn_p = sctp_ifnp;
 571                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 572                         }
 573         exit_stage_left:
 574                         SCTP_IPI_ADDR_WUNLOCK();
 575                         return (sctp_ifap);
 576                 } else {
 577                         if (sctp_ifap->ifn_p) {
 578                                 /*
 579                                  * The last IFN gets the address, remove the
 580                                  * old one
 581                                  */
 582                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 583                                     sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 584                                     sctp_ifap->ifn_p->ifn_index, if_name,
 585                                     ifn_index);
 586                                 /* remove the address from the old ifn */
 587                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 588                                 /* move the address over to the new ifn */
 589                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 590                                 goto exit_stage_left;
 591                         } else {
 592                                 /* repair ifnp which was NULL ? */
 593                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 594                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 595                                     sctp_ifnp, sctp_ifap);
 596                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 597                         }
 598                         goto exit_stage_left;
 599                 }
 600         }
 601         SCTP_IPI_ADDR_WUNLOCK();
 602         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 603         if (sctp_ifap == NULL) {
 604 #ifdef INVARIANTS
 605                 panic("No memory for IFA");
 606 #endif
 607                 return (NULL);
 608         }
 609         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 610         sctp_ifap->ifn_p = sctp_ifnp;
 611         atomic_add_int(&sctp_ifnp->refcount, 1);
 612         sctp_ifap->vrf_id = vrf_id;
 613         sctp_ifap->ifa = ifa;
 614         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 615         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 616         sctp_ifap->flags = ifa_flags;
 617         /* Set scope */
 618         switch (sctp_ifap->address.sa.sa_family) {
 619 #ifdef INET
 620         case AF_INET:
 621                 {
 622                         struct sockaddr_in *sin;
 623
 624                         sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
 625                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 626                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 627                                 sctp_ifap->src_is_loop = 1;
 628                         }
 629                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 630                                 sctp_ifap->src_is_priv = 1;
 631                         }
 632                         sctp_ifnp->num_v4++;
 633                         if (new_ifn_af)
 634                                 new_ifn_af = AF_INET;
 635                         break;
 636                 }
 637 #endif
 638 #ifdef INET6
 639         case AF_INET6:
 640                 {
 641                         /* ok to use deprecated addresses? */
 642                         struct sockaddr_in6 *sin6;
 643
 644                         sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
 645                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 646                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 647                                 sctp_ifap->src_is_loop = 1;
 648                         }
 649                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 650                                 sctp_ifap->src_is_priv = 1;
 651                         }
 652                         sctp_ifnp->num_v6++;
 653                         if (new_ifn_af)
 654                                 new_ifn_af = AF_INET6;
 655                         break;
 656                 }
 657 #endif
 658         default:
 659                 new_ifn_af = 0;
 660                 break;
 661         }
 662         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 663
 664         if ((sctp_ifap->src_is_priv == 0) &&
 665             (sctp_ifap->src_is_loop == 0)) {
 666                 sctp_ifap->src_is_glob = 1;
 667         }
 668         SCTP_IPI_ADDR_WLOCK();
 669         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 670         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 671         sctp_ifap->refcount = 1;
 672         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 673         sctp_ifnp->ifa_count++;
 674         vrf->total_ifa_count++;
 675         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 676         if (new_ifn_af) {
 677                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 678                 sctp_ifnp->registered_af = new_ifn_af;
 679         }
 680         SCTP_IPI_ADDR_WUNLOCK();
 681         if (dynamic_add) {
 682                 /*
 683                  * Bump up the refcount so that when the timer completes it
 684                  * will drop back down.
 685                  */
 686                 struct sctp_laddr *wi;
 687
 688                 atomic_add_int(&sctp_ifap->refcount, 1);
 689                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 690                 if (wi == NULL) {
 691                         /*
 692                          * Gak, what can we do? We have lost an address
 693                          * change can you say HOSED?
 694                          */
 695                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 696                         /* Opps, must decrement the count */
 697                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 698                             if_name);
 699                         return (NULL);
 700                 }
 701                 SCTP_INCR_LADDR_COUNT();
 702                 bzero(wi, sizeof(*wi));
 703                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 704                 wi->ifa = sctp_ifap;
 705                 wi->action = SCTP_ADD_IP_ADDRESS;
 706
 707                 SCTP_WQ_ADDR_LOCK();
 708                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 709                 SCTP_WQ_ADDR_UNLOCK();
 710
 711                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 712                     (struct sctp_inpcb *)NULL,
 713                     (struct sctp_tcb *)NULL,
 714                     (struct sctp_nets *)NULL);
 715         } else {
 716                 /* it's ready for use */
 717                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 718         }
 719         return (sctp_ifap);
 720 }
 721
 722 void
 723 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 724     uint32_t ifn_index, const char *if_name)
 725 {
 726         struct sctp_vrf *vrf;
 727         struct sctp_ifa *sctp_ifap = NULL;
 728
 729         SCTP_IPI_ADDR_WLOCK();
 730         vrf = sctp_find_vrf(vrf_id);
 731         if (vrf == NULL) {
 732                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 733                 goto out_now;
 734         }
 735 #ifdef SCTP_DEBUG
 736         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 737         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 738 #endif
 739         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 740         if (sctp_ifap) {
 741                 /* Validate the delete */
 742                 if (sctp_ifap->ifn_p) {
 743                         int valid = 0;
 744
 745                         /*-
 746                          * The name has priority over the ifn_index
 747                          * if its given. We do this especially for
 748                          * panda who might recycle indexes fast.
 749                          */
 750                         if (if_name) {
 751                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 752                                         /* They match its a correct delete */
 753                                         valid = 1;
 754                                 }
 755                         }
 756                         if (!valid) {
 757                                 /* last ditch check ifn_index */
 758                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 759                                         valid = 1;
 760                                 }
 761                         }
 762                         if (!valid) {
 763                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 764                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 765                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 766                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 767                                 SCTP_IPI_ADDR_WUNLOCK();
 768                                 return;
 769                         }
 770                 }
 771                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap);
 772                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 773                 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
 774                 vrf->total_ifa_count--;
 775                 LIST_REMOVE(sctp_ifap, next_bucket);
 776                 sctp_remove_ifa_from_ifn(sctp_ifap);
 777         }
 778 #ifdef SCTP_DEBUG
 779         else {
 780                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 781                     ifn_index);
 782                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 783         }
 784 #endif
 785
 786 out_now:
 787         SCTP_IPI_ADDR_WUNLOCK();
 788         if (sctp_ifap) {
 789                 struct sctp_laddr *wi;
 790
 791                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 792                 if (wi == NULL) {
 793                         /*
 794                          * Gak, what can we do? We have lost an address
 795                          * change can you say HOSED?
 796                          */
 797                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 798
 799                         /* Oops, must decrement the count */
 800                         sctp_free_ifa(sctp_ifap);
 801                         return;
 802                 }
 803                 SCTP_INCR_LADDR_COUNT();
 804                 bzero(wi, sizeof(*wi));
 805                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 806                 wi->ifa = sctp_ifap;
 807                 wi->action = SCTP_DEL_IP_ADDRESS;
 808                 SCTP_WQ_ADDR_LOCK();
 809                 /*
 810                  * Should this really be a tailq? As it is we will process
 811                  * the newest first :-0
 812                  */
 813                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 814                 SCTP_WQ_ADDR_UNLOCK();
 815
 816                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 817                     (struct sctp_inpcb *)NULL,
 818                     (struct sctp_tcb *)NULL,
 819                     (struct sctp_nets *)NULL);
 820         }
 821         return;
 822 }
 823
 824
 825 static struct sctp_tcb *
 826 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 827     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
 828 {
 829         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
 830         /*
 831          * If we support the TCP model, then we must now dig through to see
 832          * if we can find our endpoint in the list of tcp ep's.
 833          */
 834         uint16_t lport, rport;
 835         struct sctppcbhead *ephead;
 836         struct sctp_inpcb *inp;
 837         struct sctp_laddr *laddr;
 838         struct sctp_tcb *stcb;
 839         struct sctp_nets *net;
 840
 841         if ((to == NULL) || (from == NULL)) {
 842                 return (NULL);
 843         }
 844         switch (to->sa_family) {
 845 #ifdef INET
 846         case AF_INET:
 847                 if (from->sa_family == AF_INET) {
 848                         lport = ((struct sockaddr_in *)to)->sin_port;
 849                         rport = ((struct sockaddr_in *)from)->sin_port;
 850                 } else {
 851                         return (NULL);
 852                 }
 853                 break;
 854 #endif
 855 #ifdef INET6
 856         case AF_INET6:
 857                 if (from->sa_family == AF_INET6) {
 858                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
 859                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
 860                 } else {
 861                         return (NULL);
 862                 }
 863                 break;
 864 #endif
 865         default:
 866                 return (NULL);
 867         }
 868         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
 869         /*
 870          * Ok now for each of the guys in this bucket we must look and see:
 871          * - Does the remote port match. - Does there single association's
 872          * addresses match this address (to). If so we update p_ep to point
 873          * to this ep and return the tcb from it.
 874          */
 875         LIST_FOREACH(inp, ephead, sctp_hash) {
 876                 SCTP_INP_RLOCK(inp);
 877                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 878                         SCTP_INP_RUNLOCK(inp);
 879                         continue;
 880                 }
 881                 if (lport != inp->sctp_lport) {
 882                         SCTP_INP_RUNLOCK(inp);
 883                         continue;
 884                 }
 885                 if (inp->def_vrf_id != vrf_id) {
 886                         SCTP_INP_RUNLOCK(inp);
 887                         continue;
 888                 }
 889                 /* check to see if the ep has one of the addresses */
 890                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 891                         /* We are NOT bound all, so look further */
 892                         int match = 0;
 893
 894                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 895
 896                                 if (laddr->ifa == NULL) {
 897                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
 898                                         continue;
 899                                 }
 900                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 901                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 902                                         continue;
 903                                 }
 904                                 if (laddr->ifa->address.sa.sa_family ==
 905                                     to->sa_family) {
 906                                         /* see if it matches */
 907
 908 #ifdef INET
 909                                         if (from->sa_family == AF_INET) {
 910                                                 struct sockaddr_in *intf_addr,
 911                                                            *sin;
 912
 913                                                 intf_addr = &laddr->ifa->address.sin;
 914                                                 sin = (struct sockaddr_in *)to;
 915                                                 if (sin->sin_addr.s_addr ==
 916                                                     intf_addr->sin_addr.s_addr) {
 917                                                         match = 1;
 918                                                         break;
 919                                                 }
 920                                         }
 921 #endif
 922 #ifdef INET6
 923                                         if (from->sa_family == AF_INET6) {
 924                                                 struct sockaddr_in6 *intf_addr6;
 925                                                 struct sockaddr_in6 *sin6;
 926
 927                                                 sin6 = (struct sockaddr_in6 *)
 928                                                     to;
 929                                                 intf_addr6 = &laddr->ifa->address.sin6;
 930
 931                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
 932                                                     intf_addr6)) {
 933                                                         match = 1;
 934                                                         break;
 935                                                 }
 936                                         }
 937 #endif
 938                                 }
 939                         }
 940                         if (match == 0) {
 941                                 /* This endpoint does not have this address */
 942                                 SCTP_INP_RUNLOCK(inp);
 943                                 continue;
 944                         }
 945                 }
 946                 /*
 947                  * Ok if we hit here the ep has the address, does it hold
 948                  * the tcb?
 949                  */
 950
 951                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 952                 if (stcb == NULL) {
 953                         SCTP_INP_RUNLOCK(inp);
 954                         continue;
 955                 }
 956                 SCTP_TCB_LOCK(stcb);
 957                 if (stcb->rport != rport) {
 958                         /* remote port does not match. */
 959                         SCTP_TCB_UNLOCK(stcb);
 960                         SCTP_INP_RUNLOCK(inp);
 961                         continue;
 962                 }
 963                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 964                         SCTP_TCB_UNLOCK(stcb);
 965                         SCTP_INP_RUNLOCK(inp);
 966                         continue;
 967                 }
 968                 /* Does this TCB have a matching address? */
 969                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 970
 971                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
 972                                 /* not the same family, can't be a match */
 973                                 continue;
 974                         }
 975                         switch (from->sa_family) {
 976 #ifdef INET
 977                         case AF_INET:
 978                                 {
 979                                         struct sockaddr_in *sin, *rsin;
 980
 981                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
 982                                         rsin = (struct sockaddr_in *)from;
 983                                         if (sin->sin_addr.s_addr ==
 984                                             rsin->sin_addr.s_addr) {
 985                                                 /* found it */
 986                                                 if (netp != NULL) {
 987                                                         *netp = net;
 988                                                 }
 989                                                 /*
 990                                                  * Update the endpoint
 991                                                  * pointer
 992                                                  */
 993                                                 *inp_p = inp;
 994                                                 SCTP_INP_RUNLOCK(inp);
 995                                                 return (stcb);
 996                                         }
 997                                         break;
 998                                 }
 999 #endif
1000 #ifdef INET6
1001                         case AF_INET6:
1002                                 {
1003                                         struct sockaddr_in6 *sin6, *rsin6;
1004
1005                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1006                                         rsin6 = (struct sockaddr_in6 *)from;
1007                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1008                                             rsin6)) {
1009                                                 /* found it */
1010                                                 if (netp != NULL) {
1011                                                         *netp = net;
1012                                                 }
1013                                                 /*
1014                                                  * Update the endpoint
1015                                                  * pointer
1016                                                  */
1017                                                 *inp_p = inp;
1018                                                 SCTP_INP_RUNLOCK(inp);
1019                                                 return (stcb);
1020                                         }
1021                                         break;
1022                                 }
1023 #endif
1024                         default:
1025                                 /* TSNH */
1026                                 break;
1027                         }
1028                 }
1029                 SCTP_TCB_UNLOCK(stcb);
1030                 SCTP_INP_RUNLOCK(inp);
1031         }
1032         return (NULL);
1033 }
1034
1035 static int
1036 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
1037 {
1038         int loopback_scope, ipv4_local_scope, local_scope, site_scope;
1039         int ipv4_addr_legal, ipv6_addr_legal;
1040         struct sctp_vrf *vrf;
1041         struct sctp_ifn *sctp_ifn;
1042         struct sctp_ifa *sctp_ifa;
1043
1044         loopback_scope = stcb->asoc.loopback_scope;
1045         ipv4_local_scope = stcb->asoc.ipv4_local_scope;
1046         local_scope = stcb->asoc.local_scope;
1047         site_scope = stcb->asoc.site_scope;
1048         ipv4_addr_legal = ipv6_addr_legal = 0;
1049         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1050                 ipv6_addr_legal = 1;
1051                 if (SCTP_IPV6_V6ONLY(stcb->sctp_ep) == 0) {
1052                         ipv4_addr_legal = 1;
1053                 }
1054         } else {
1055                 ipv4_addr_legal = 1;
1056         }
1057
1058         SCTP_IPI_ADDR_RLOCK();
1059         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
1060         if (vrf == NULL) {
1061                 /* no vrf, no addresses */
1062                 SCTP_IPI_ADDR_RUNLOCK();
1063                 return (0);
1064         }
1065         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
1066                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
1067                         if ((loopback_scope == 0) &&
1068                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
1069                                 continue;
1070                         }
1071                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
1072                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
1073                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
1074                                         /*
1075                                          * We allow pending addresses, where
1076                                          * we have sent an asconf-add to be
1077                                          * considered valid.
1078                                          */
1079                                         continue;
1080                                 }
1081                                 switch (sctp_ifa->address.sa.sa_family) {
1082 #ifdef INET
1083                                 case AF_INET:
1084                                         if (ipv4_addr_legal) {
1085                                                 struct sockaddr_in *sin,
1086                                                            *rsin;
1087
1088                                                 sin = &sctp_ifa->address.sin;
1089                                                 rsin = (struct sockaddr_in *)to;
1090                                                 if ((ipv4_local_scope == 0) &&
1091                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
1092                                                         continue;
1093                                                 }
1094                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1095                                                         SCTP_IPI_ADDR_RUNLOCK();
1096                                                         return (1);
1097                                                 }
1098                                         }
1099                                         break;
1100 #endif
1101 #ifdef INET6
1102                                 case AF_INET6:
1103                                         if (ipv6_addr_legal) {
1104                                                 struct sockaddr_in6 *sin6,
1105                                                             *rsin6;
1106
1107                                                 sin6 = &sctp_ifa->address.sin6;
1108                                                 rsin6 = (struct sockaddr_in6 *)to;
1109                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1110                                                         if (local_scope == 0)
1111                                                                 continue;
1112                                                         if (sin6->sin6_scope_id == 0) {
1113                                                                 if (sa6_recoverscope(sin6) != 0)
1114                                                                         continue;
1115                                                         }
1116                                                 }
1117                                                 if ((site_scope == 0) &&
1118                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1119                                                         continue;
1120                                                 }
1121                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1122                                                         SCTP_IPI_ADDR_RUNLOCK();
1123                                                         return (1);
1124                                                 }
1125                                         }
1126                                         break;
1127 #endif
1128                                 default:
1129                                         /* TSNH */
1130                                         break;
1131                                 }
1132                         }
1133                 }
1134         } else {
1135                 struct sctp_laddr *laddr;
1136
1137                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
1138                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
1139                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
1140                                 /*
1141                                  * We allow pending addresses, where we have
1142                                  * sent an asconf-add to be considered
1143                                  * valid.
1144                                  */
1145                                 continue;
1146                         }
1147                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
1148                                 continue;
1149                         }
1150                         switch (to->sa_family) {
1151 #ifdef INET
1152                         case AF_INET:
1153                                 {
1154                                         struct sockaddr_in *sin, *rsin;
1155
1156                                         sin = (struct sockaddr_in *)&laddr->ifa->address.sin;
1157                                         rsin = (struct sockaddr_in *)to;
1158                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1159                                                 SCTP_IPI_ADDR_RUNLOCK();
1160                                                 return (1);
1161                                         }
1162                                         break;
1163                                 }
1164 #endif
1165 #ifdef INET6
1166                         case AF_INET6:
1167                                 {
1168                                         struct sockaddr_in6 *sin6, *rsin6;
1169
1170                                         sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6;
1171                                         rsin6 = (struct sockaddr_in6 *)to;
1172                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1173                                                 SCTP_IPI_ADDR_RUNLOCK();
1174                                                 return (1);
1175                                         }
1176                                         break;
1177                                 }
1178
1179 #endif
1180                         default:
1181                                 /* TSNH */
1182                                 break;
1183                         }
1184
1185                 }
1186         }
1187         SCTP_IPI_ADDR_RUNLOCK();
1188         return (0);
1189 }
1190
1191 /*
1192  * rules for use
1193  *
1194  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1195  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1196  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1197  * NULL.
1198  */
1199
1200 struct sctp_tcb *
1201 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1202     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1203 {
1204         struct sctpasochead *head;
1205         struct sctp_inpcb *inp;
1206         struct sctp_tcb *stcb = NULL;
1207         struct sctp_nets *net;
1208         uint16_t rport;
1209
1210         inp = *inp_p;
1211         if (remote->sa_family == AF_INET) {
1212                 rport = (((struct sockaddr_in *)remote)->sin_port);
1213         } else if (remote->sa_family == AF_INET6) {
1214                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1215         } else {
1216                 return (NULL);
1217         }
1218         if (locked_tcb) {
1219                 /*
1220                  * UN-lock so we can do proper locking here this occurs when
1221                  * called from load_addresses_from_init.
1222                  */
1223                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1224                 SCTP_TCB_UNLOCK(locked_tcb);
1225         }
1226         SCTP_INP_INFO_RLOCK();
1227         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
1228                 /*-
1229                  * Now either this guy is our listener or it's the
1230                  * connector. If it is the one that issued the connect, then
1231                  * it's only chance is to be the first TCB in the list. If
1232                  * it is the acceptor, then do the special_lookup to hash
1233                  * and find the real inp.
1234                  */
1235                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1236                         /* to is peer addr, from is my addr */
1237                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1238                             netp, inp->def_vrf_id);
1239                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1240                                 /* we have a locked tcb, lower refcount */
1241                                 SCTP_INP_DECR_REF(inp);
1242                         }
1243                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1244                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1245                                 SCTP_TCB_LOCK(locked_tcb);
1246                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1247                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1248                         }
1249                         SCTP_INP_INFO_RUNLOCK();
1250                         return (stcb);
1251                 } else {
1252                         SCTP_INP_WLOCK(inp);
1253                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1254                                 goto null_return;
1255                         }
1256                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1257                         if (stcb == NULL) {
1258                                 goto null_return;
1259                         }
1260                         SCTP_TCB_LOCK(stcb);
1261
1262                         if (stcb->rport != rport) {
1263                                 /* remote port does not match. */
1264                                 SCTP_TCB_UNLOCK(stcb);
1265                                 goto null_return;
1266                         }
1267                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1268                                 SCTP_TCB_UNLOCK(stcb);
1269                                 goto null_return;
1270                         }
1271                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1272                                 SCTP_TCB_UNLOCK(stcb);
1273                                 goto null_return;
1274                         }
1275                         /* now look at the list of remote addresses */
1276                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1277 #ifdef INVARIANTS
1278                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1279                                         panic("Corrupt net list");
1280                                 }
1281 #endif
1282                                 if (net->ro._l_addr.sa.sa_family !=
1283                                     remote->sa_family) {
1284                                         /* not the same family */
1285                                         continue;
1286                                 }
1287                                 switch (remote->sa_family) {
1288 #ifdef INET
1289                                 case AF_INET:
1290                                         {
1291                                                 struct sockaddr_in *sin,
1292                                                            *rsin;
1293
1294                                                 sin = (struct sockaddr_in *)
1295                                                     &net->ro._l_addr;
1296                                                 rsin = (struct sockaddr_in *)remote;
1297                                                 if (sin->sin_addr.s_addr ==
1298                                                     rsin->sin_addr.s_addr) {
1299                                                         /* found it */
1300                                                         if (netp != NULL) {
1301                                                                 *netp = net;
1302                                                         }
1303                                                         if (locked_tcb == NULL) {
1304                                                                 SCTP_INP_DECR_REF(inp);
1305                                                         } else if (locked_tcb != stcb) {
1306                                                                 SCTP_TCB_LOCK(locked_tcb);
1307                                                         }
1308                                                         if (locked_tcb) {
1309                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1310                                                         }
1311                                                         SCTP_INP_WUNLOCK(inp);
1312                                                         SCTP_INP_INFO_RUNLOCK();
1313                                                         return (stcb);
1314                                                 }
1315                                                 break;
1316                                         }
1317 #endif
1318 #ifdef INET6
1319                                 case AF_INET6:
1320                                         {
1321                                                 struct sockaddr_in6 *sin6,
1322                                                             *rsin6;
1323
1324                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1325                                                 rsin6 = (struct sockaddr_in6 *)remote;
1326                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1327                                                     rsin6)) {
1328                                                         /* found it */
1329                                                         if (netp != NULL) {
1330                                                                 *netp = net;
1331                                                         }
1332                                                         if (locked_tcb == NULL) {
1333                                                                 SCTP_INP_DECR_REF(inp);
1334                                                         } else if (locked_tcb != stcb) {
1335                                                                 SCTP_TCB_LOCK(locked_tcb);
1336                                                         }
1337                                                         if (locked_tcb) {
1338                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1339                                                         }
1340                                                         SCTP_INP_WUNLOCK(inp);
1341                                                         SCTP_INP_INFO_RUNLOCK();
1342                                                         return (stcb);
1343                                                 }
1344                                                 break;
1345                                         }
1346 #endif
1347                                 default:
1348                                         /* TSNH */
1349                                         break;
1350                                 }
1351                         }
1352                         SCTP_TCB_UNLOCK(stcb);
1353                 }
1354         } else {
1355                 SCTP_INP_WLOCK(inp);
1356                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1357                         goto null_return;
1358                 }
1359                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1360                     inp->sctp_hashmark)];
1361                 if (head == NULL) {
1362                         goto null_return;
1363                 }
1364                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1365                         if (stcb->rport != rport) {
1366                                 /* remote port does not match */
1367                                 continue;
1368                         }
1369                         SCTP_TCB_LOCK(stcb);
1370                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1371                                 SCTP_TCB_UNLOCK(stcb);
1372                                 continue;
1373                         }
1374                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1375                                 SCTP_TCB_UNLOCK(stcb);
1376                                 continue;
1377                         }
1378                         /* now look at the list of remote addresses */
1379                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1380 #ifdef INVARIANTS
1381                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1382                                         panic("Corrupt net list");
1383                                 }
1384 #endif
1385                                 if (net->ro._l_addr.sa.sa_family !=
1386                                     remote->sa_family) {
1387                                         /* not the same family */
1388                                         continue;
1389                                 }
1390                                 switch (remote->sa_family) {
1391 #ifdef INET
1392                                 case AF_INET:
1393                                         {
1394                                                 struct sockaddr_in *sin,
1395                                                            *rsin;
1396
1397                                                 sin = (struct sockaddr_in *)
1398                                                     &net->ro._l_addr;
1399                                                 rsin = (struct sockaddr_in *)remote;
1400                                                 if (sin->sin_addr.s_addr ==
1401                                                     rsin->sin_addr.s_addr) {
1402                                                         /* found it */
1403                                                         if (netp != NULL) {
1404                                                                 *netp = net;
1405                                                         }
1406                                                         if (locked_tcb == NULL) {
1407                                                                 SCTP_INP_DECR_REF(inp);
1408                                                         } else if (locked_tcb != stcb) {
1409                                                                 SCTP_TCB_LOCK(locked_tcb);
1410                                                         }
1411                                                         if (locked_tcb) {
1412                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1413                                                         }
1414                                                         SCTP_INP_WUNLOCK(inp);
1415                                                         SCTP_INP_INFO_RUNLOCK();
1416                                                         return (stcb);
1417                                                 }
1418                                                 break;
1419                                         }
1420 #endif
1421 #ifdef INET6
1422                                 case AF_INET6:
1423                                         {
1424                                                 struct sockaddr_in6 *sin6,
1425                                                             *rsin6;
1426
1427                                                 sin6 = (struct sockaddr_in6 *)
1428                                                     &net->ro._l_addr;
1429                                                 rsin6 = (struct sockaddr_in6 *)remote;
1430                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1431                                                     rsin6)) {
1432                                                         /* found it */
1433                                                         if (netp != NULL) {
1434                                                                 *netp = net;
1435                                                         }
1436                                                         if (locked_tcb == NULL) {
1437                                                                 SCTP_INP_DECR_REF(inp);
1438                                                         } else if (locked_tcb != stcb) {
1439                                                                 SCTP_TCB_LOCK(locked_tcb);
1440                                                         }
1441                                                         if (locked_tcb) {
1442                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1443                                                         }
1444                                                         SCTP_INP_WUNLOCK(inp);
1445                                                         SCTP_INP_INFO_RUNLOCK();
1446                                                         return (stcb);
1447                                                 }
1448                                                 break;
1449                                         }
1450 #endif
1451                                 default:
1452                                         /* TSNH */
1453                                         break;
1454                                 }
1455                         }
1456                         SCTP_TCB_UNLOCK(stcb);
1457                 }
1458         }
1459 null_return:
1460         /* clean up for returning null */
1461         if (locked_tcb) {
1462                 SCTP_TCB_LOCK(locked_tcb);
1463                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1464         }
1465         SCTP_INP_WUNLOCK(inp);
1466         SCTP_INP_INFO_RUNLOCK();
1467         /* not found */
1468         return (NULL);
1469 }
1470
1471 /*
1472  * Find an association for a specific endpoint using the association id given
1473  * out in the COMM_UP notification
1474  */
1475
1476 struct sctp_tcb *
1477 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1478 {
1479         /*
1480          * Use my the assoc_id to find a endpoint
1481          */
1482         struct sctpasochead *head;
1483         struct sctp_tcb *stcb;
1484         uint32_t id;
1485
1486         if (inp == NULL) {
1487                 SCTP_PRINTF("TSNH ep_associd\n");
1488                 return (NULL);
1489         }
1490         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1491                 SCTP_PRINTF("TSNH ep_associd0\n");
1492                 return (NULL);
1493         }
1494         id = (uint32_t) asoc_id;
1495         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1496         if (head == NULL) {
1497                 /* invalid id TSNH */
1498                 SCTP_PRINTF("TSNH ep_associd1\n");
1499                 return (NULL);
1500         }
1501         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1502                 if (stcb->asoc.assoc_id == id) {
1503                         if (inp != stcb->sctp_ep) {
1504                                 /*
1505                                  * some other guy has the same id active (id
1506                                  * collision ??).
1507                                  */
1508                                 SCTP_PRINTF("TSNH ep_associd2\n");
1509                                 continue;
1510                         }
1511                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1512                                 continue;
1513                         }
1514                         if (want_lock) {
1515                                 SCTP_TCB_LOCK(stcb);
1516                         }
1517                         return (stcb);
1518                 }
1519         }
1520         return (NULL);
1521 }
1522
1523
1524 struct sctp_tcb *
1525 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1526 {
1527         struct sctp_tcb *stcb;
1528
1529         SCTP_INP_RLOCK(inp);
1530         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1531         SCTP_INP_RUNLOCK(inp);
1532         return (stcb);
1533 }
1534
1535
1536 static struct sctp_inpcb *
1537 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1538     uint16_t lport, uint32_t vrf_id)
1539 {
1540         struct sctp_inpcb *inp;
1541         struct sctp_laddr *laddr;
1542
1543 #ifdef INET
1544         struct sockaddr_in *sin;
1545
1546 #endif
1547 #ifdef INET6
1548         struct sockaddr_in6 *sin6;
1549         struct sockaddr_in6 *intf_addr6;
1550
1551 #endif
1552
1553         int fnd;
1554
1555         /*
1556          * Endpoint probe expects that the INP_INFO is locked.
1557          */
1558 #ifdef INET
1559         sin = NULL;
1560 #endif
1561 #ifdef INET6
1562         sin6 = NULL;
1563 #endif
1564         switch (nam->sa_family) {
1565 #ifdef INET
1566         case AF_INET:
1567                 sin = (struct sockaddr_in *)nam;
1568                 break;
1569 #endif
1570 #ifdef INET6
1571         case AF_INET6:
1572                 sin6 = (struct sockaddr_in6 *)nam;
1573                 break;
1574 #endif
1575         default:
1576                 /* unsupported family */
1577                 return (NULL);
1578         }
1579
1580         if (head == NULL)
1581                 return (NULL);
1582
1583         LIST_FOREACH(inp, head, sctp_hash) {
1584                 SCTP_INP_RLOCK(inp);
1585                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1586                         SCTP_INP_RUNLOCK(inp);
1587                         continue;
1588                 }
1589                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1590                     (inp->sctp_lport == lport)) {
1591                         /* got it */
1592 #ifdef INET
1593                         if ((nam->sa_family == AF_INET) &&
1594                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1595                             SCTP_IPV6_V6ONLY(inp)) {
1596                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1597                                 SCTP_INP_RUNLOCK(inp);
1598                                 continue;
1599                         }
1600 #endif
1601 #ifdef INET6
1602                         /* A V6 address and the endpoint is NOT bound V6 */
1603                         if (nam->sa_family == AF_INET6 &&
1604                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1605                                 SCTP_INP_RUNLOCK(inp);
1606                                 continue;
1607                         }
1608 #endif
1609                         /* does a VRF id match? */
1610                         fnd = 0;
1611                         if (inp->def_vrf_id == vrf_id)
1612                                 fnd = 1;
1613
1614                         SCTP_INP_RUNLOCK(inp);
1615                         if (!fnd)
1616                                 continue;
1617                         return (inp);
1618                 }
1619                 SCTP_INP_RUNLOCK(inp);
1620         }
1621         switch (nam->sa_family) {
1622 #ifdef INET
1623         case AF_INET:
1624                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1625                         /* Can't hunt for one that has no address specified */
1626                         return (NULL);
1627                 }
1628                 break;
1629 #endif
1630 #ifdef INET6
1631         case AF_INET6:
1632                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1633                         /* Can't hunt for one that has no address specified */
1634                         return (NULL);
1635                 }
1636                 break;
1637 #endif
1638         default:
1639                 break;
1640         }
1641         /*
1642          * ok, not bound to all so see if we can find a EP bound to this
1643          * address.
1644          */
1645         LIST_FOREACH(inp, head, sctp_hash) {
1646                 SCTP_INP_RLOCK(inp);
1647                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1648                         SCTP_INP_RUNLOCK(inp);
1649                         continue;
1650                 }
1651                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1652                         SCTP_INP_RUNLOCK(inp);
1653                         continue;
1654                 }
1655                 /*
1656                  * Ok this could be a likely candidate, look at all of its
1657                  * addresses
1658                  */
1659                 if (inp->sctp_lport != lport) {
1660                         SCTP_INP_RUNLOCK(inp);
1661                         continue;
1662                 }
1663                 /* does a VRF id match? */
1664                 fnd = 0;
1665                 if (inp->def_vrf_id == vrf_id)
1666                         fnd = 1;
1667
1668                 if (!fnd) {
1669                         SCTP_INP_RUNLOCK(inp);
1670                         continue;
1671                 }
1672                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1673                         if (laddr->ifa == NULL) {
1674                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1675                                     __FUNCTION__);
1676                                 continue;
1677                         }
1678                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1679                             laddr->ifa);
1680                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1681                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1682                                 continue;
1683                         }
1684                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1685                                 /* possible, see if it matches */
1686                                 switch (nam->sa_family) {
1687 #ifdef INET
1688                                 case AF_INET:
1689                                         if (sin->sin_addr.s_addr ==
1690                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1691                                                 SCTP_INP_RUNLOCK(inp);
1692                                                 return (inp);
1693                                         }
1694                                         break;
1695 #endif
1696 #ifdef INET6
1697                                 case AF_INET6:
1698                                         intf_addr6 = &laddr->ifa->address.sin6;
1699                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1700                                             intf_addr6)) {
1701                                                 SCTP_INP_RUNLOCK(inp);
1702                                                 return (inp);
1703                                         }
1704                                         break;
1705 #endif
1706                                 }
1707                         }
1708                 }
1709                 SCTP_INP_RUNLOCK(inp);
1710         }
1711         return (NULL);
1712 }
1713
1714
1715 static struct sctp_inpcb *
1716 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1717 {
1718         struct sctppcbhead *head;
1719         struct sctp_inpcb *t_inp;
1720         int fnd;
1721
1722         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1723             SCTP_BASE_INFO(hashmark))];
1724         LIST_FOREACH(t_inp, head, sctp_hash) {
1725                 if (t_inp->sctp_lport != lport) {
1726                         continue;
1727                 }
1728                 /* is it in the VRF in question */
1729                 fnd = 0;
1730                 if (t_inp->def_vrf_id == vrf_id)
1731                         fnd = 1;
1732                 if (!fnd)
1733                         continue;
1734
1735                 /* This one is in use. */
1736                 /* check the v6/v4 binding issue */
1737                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1738                     SCTP_IPV6_V6ONLY(t_inp)) {
1739                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1740                                 /* collision in V6 space */
1741                                 return (t_inp);
1742                         } else {
1743                                 /* inp is BOUND_V4 no conflict */
1744                                 continue;
1745                         }
1746                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1747                         /* t_inp is bound v4 and v6, conflict always */
1748                         return (t_inp);
1749                 } else {
1750                         /* t_inp is bound only V4 */
1751                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1752                             SCTP_IPV6_V6ONLY(inp)) {
1753                                 /* no conflict */
1754                                 continue;
1755                         }
1756                         /* else fall through to conflict */
1757                 }
1758                 return (t_inp);
1759         }
1760         return (NULL);
1761 }
1762
1763
1764 int
1765 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1766 {
1767         /* For 1-2-1 with port reuse */
1768         struct sctppcbhead *head;
1769         struct sctp_inpcb *tinp;
1770
1771         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1772                 /* only works with port reuse on */
1773                 return (-1);
1774         }
1775         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1776                 return (0);
1777         }
1778         SCTP_INP_RUNLOCK(inp);
1779         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1780             SCTP_BASE_INFO(hashmark))];
1781         /* Kick out all non-listeners to the TCP hash */
1782         LIST_FOREACH(tinp, head, sctp_hash) {
1783                 if (tinp->sctp_lport != inp->sctp_lport) {
1784                         continue;
1785                 }
1786                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1787                         continue;
1788                 }
1789                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1790                         continue;
1791                 }
1792                 if (tinp->sctp_socket->so_qlimit) {
1793                         continue;
1794                 }
1795                 SCTP_INP_WLOCK(tinp);
1796                 LIST_REMOVE(tinp, sctp_hash);
1797                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1798                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1799                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1800                 SCTP_INP_WUNLOCK(tinp);
1801         }
1802         SCTP_INP_WLOCK(inp);
1803         /* Pull from where he was */
1804         LIST_REMOVE(inp, sctp_hash);
1805         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1806         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1807         LIST_INSERT_HEAD(head, inp, sctp_hash);
1808         SCTP_INP_WUNLOCK(inp);
1809         SCTP_INP_RLOCK(inp);
1810         return (0);
1811 }
1812
1813
1814 struct sctp_inpcb *
1815 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1816     uint32_t vrf_id)
1817 {
1818         /*
1819          * First we check the hash table to see if someone has this port
1820          * bound with just the port.
1821          */
1822         struct sctp_inpcb *inp;
1823         struct sctppcbhead *head;
1824         int lport;
1825         unsigned int i;
1826
1827 #ifdef INET
1828         struct sockaddr_in *sin;
1829
1830 #endif
1831 #ifdef INET6
1832         struct sockaddr_in6 *sin6;
1833
1834 #endif
1835
1836         switch (nam->sa_family) {
1837 #ifdef INET
1838         case AF_INET:
1839                 sin = (struct sockaddr_in *)nam;
1840                 lport = ((struct sockaddr_in *)nam)->sin_port;
1841                 break;
1842 #endif
1843 #ifdef INET6
1844         case AF_INET6:
1845                 sin6 = (struct sockaddr_in6 *)nam;
1846                 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
1847                 break;
1848 #endif
1849         default:
1850                 return (NULL);
1851         }
1852         /*
1853          * I could cheat here and just cast to one of the types but we will
1854          * do it right. It also provides the check against an Unsupported
1855          * type too.
1856          */
1857         /* Find the head of the ALLADDR chain */
1858         if (have_lock == 0) {
1859                 SCTP_INP_INFO_RLOCK();
1860         }
1861         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1862             SCTP_BASE_INFO(hashmark))];
1863         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1864
1865         /*
1866          * If the TCP model exists it could be that the main listening
1867          * endpoint is gone but there still exists a connected socket for
1868          * this guy. If so we can return the first one that we find. This
1869          * may NOT be the correct one so the caller should be wary on the
1870          * returned INP. Currently the only caller that sets find_tcp_pool
1871          * is in bindx where we are verifying that a user CAN bind the
1872          * address. He either has bound it already, or someone else has, or
1873          * its open to bind, so this is good enough.
1874          */
1875         if (inp == NULL && find_tcp_pool) {
1876                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1877                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1878                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1879                         if (inp) {
1880                                 break;
1881                         }
1882                 }
1883         }
1884         if (inp) {
1885                 SCTP_INP_INCR_REF(inp);
1886         }
1887         if (have_lock == 0) {
1888                 SCTP_INP_INFO_RUNLOCK();
1889         }
1890         return (inp);
1891 }
1892
1893 /*
1894  * Find an association for an endpoint with the pointer to whom you want to
1895  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1896  * need to change the *to to some other struct like a mbuf...
1897  */
1898 struct sctp_tcb *
1899 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1900     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1901     uint32_t vrf_id)
1902 {
1903         struct sctp_inpcb *inp = NULL;
1904         struct sctp_tcb *retval;
1905
1906         SCTP_INP_INFO_RLOCK();
1907         if (find_tcp_pool) {
1908                 if (inp_p != NULL) {
1909                         retval = sctp_tcb_special_locate(inp_p, from, to, netp,
1910                             vrf_id);
1911                 } else {
1912                         retval = sctp_tcb_special_locate(&inp, from, to, netp,
1913                             vrf_id);
1914                 }
1915                 if (retval != NULL) {
1916                         SCTP_INP_INFO_RUNLOCK();
1917                         return (retval);
1918                 }
1919         }
1920         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1921         if (inp_p != NULL) {
1922                 *inp_p = inp;
1923         }
1924         SCTP_INP_INFO_RUNLOCK();
1925
1926         if (inp == NULL) {
1927                 return (NULL);
1928         }
1929         /*
1930          * ok, we have an endpoint, now lets find the assoc for it (if any)
1931          * we now place the source address or from in the to of the find
1932          * endpoint call. Since in reality this chain is used from the
1933          * inbound packet side.
1934          */
1935         if (inp_p != NULL) {
1936                 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1937                     NULL);
1938         } else {
1939                 retval = sctp_findassociation_ep_addr(&inp, from, netp, to,
1940                     NULL);
1941         }
1942         return retval;
1943 }
1944
1945
1946 /*
1947  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1948  * find all addresses that the sender has specified in any address list. Each
1949  * address will be used to lookup the TCB and see if one exits.
1950  */
1951 static struct sctp_tcb *
1952 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1953     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1954     struct sockaddr *dest)
1955 {
1956         struct sctp_paramhdr *phdr, parm_buf;
1957         struct sctp_tcb *retval;
1958         uint32_t ptype, plen;
1959
1960 #ifdef INET
1961         struct sockaddr_in sin4;
1962
1963 #endif
1964 #ifdef INET6
1965         struct sockaddr_in6 sin6;
1966
1967 #endif
1968
1969 #ifdef INET
1970         memset(&sin4, 0, sizeof(sin4));
1971         sin4.sin_len = sizeof(sin4);
1972         sin4.sin_family = AF_INET;
1973         sin4.sin_port = sh->src_port;
1974 #endif
1975 #ifdef INET6
1976         memset(&sin6, 0, sizeof(sin6));
1977         sin6.sin6_len = sizeof(sin6);
1978         sin6.sin6_family = AF_INET6;
1979         sin6.sin6_port = sh->src_port;
1980 #endif
1981
1982         retval = NULL;
1983         offset += sizeof(struct sctp_init_chunk);
1984
1985         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1986         while (phdr != NULL) {
1987                 /* now we must see if we want the parameter */
1988                 ptype = ntohs(phdr->param_type);
1989                 plen = ntohs(phdr->param_length);
1990                 if (plen == 0) {
1991                         break;
1992                 }
1993 #ifdef INET
1994                 if (ptype == SCTP_IPV4_ADDRESS &&
1995                     plen == sizeof(struct sctp_ipv4addr_param)) {
1996                         /* Get the rest of the address */
1997                         struct sctp_ipv4addr_param ip4_parm, *p4;
1998
1999                         phdr = sctp_get_next_param(m, offset,
2000                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2001                         if (phdr == NULL) {
2002                                 return (NULL);
2003                         }
2004                         p4 = (struct sctp_ipv4addr_param *)phdr;
2005                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2006                         /* look it up */
2007                         retval = sctp_findassociation_ep_addr(inp_p,
2008                             (struct sockaddr *)&sin4, netp, dest, NULL);
2009                         if (retval != NULL) {
2010                                 return (retval);
2011                         }
2012                 }
2013 #endif
2014 #ifdef INET6
2015                 if (ptype == SCTP_IPV6_ADDRESS &&
2016                     plen == sizeof(struct sctp_ipv6addr_param)) {
2017                         /* Get the rest of the address */
2018                         struct sctp_ipv6addr_param ip6_parm, *p6;
2019
2020                         phdr = sctp_get_next_param(m, offset,
2021                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
2022                         if (phdr == NULL) {
2023                                 return (NULL);
2024                         }
2025                         p6 = (struct sctp_ipv6addr_param *)phdr;
2026                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2027                         /* look it up */
2028                         retval = sctp_findassociation_ep_addr(inp_p,
2029                             (struct sockaddr *)&sin6, netp, dest, NULL);
2030                         if (retval != NULL) {
2031                                 return (retval);
2032                         }
2033                 }
2034 #endif
2035                 offset += SCTP_SIZE32(plen);
2036                 phdr = sctp_get_next_param(m, offset, &parm_buf,
2037                     sizeof(parm_buf));
2038         }
2039         return (NULL);
2040 }
2041
2042 static struct sctp_tcb *
2043 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2044     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2045     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2046 {
2047         /*
2048          * Use my vtag to hash. If we find it we then verify the source addr
2049          * is in the assoc. If all goes well we save a bit on rec of a
2050          * packet.
2051          */
2052         struct sctpasochead *head;
2053         struct sctp_nets *net;
2054         struct sctp_tcb *stcb;
2055
2056         *netp = NULL;
2057         *inp_p = NULL;
2058         SCTP_INP_INFO_RLOCK();
2059         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2060             SCTP_BASE_INFO(hashasocmark))];
2061         if (head == NULL) {
2062                 /* invalid vtag */
2063                 SCTP_INP_INFO_RUNLOCK();
2064                 return (NULL);
2065         }
2066         LIST_FOREACH(stcb, head, sctp_asocs) {
2067                 SCTP_INP_RLOCK(stcb->sctp_ep);
2068                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2069                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2070                         continue;
2071                 }
2072                 SCTP_TCB_LOCK(stcb);
2073                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2074                 if (stcb->asoc.my_vtag == vtag) {
2075                         /* candidate */
2076                         if (stcb->rport != rport) {
2077                                 SCTP_TCB_UNLOCK(stcb);
2078                                 continue;
2079                         }
2080                         if (stcb->sctp_ep->sctp_lport != lport) {
2081                                 SCTP_TCB_UNLOCK(stcb);
2082                                 continue;
2083                         }
2084                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2085                                 SCTP_TCB_UNLOCK(stcb);
2086                                 continue;
2087                         }
2088                         /* RRS:Need toaddr check here */
2089                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2090                                 /* Endpoint does not own this address */
2091                                 SCTP_TCB_UNLOCK(stcb);
2092                                 continue;
2093                         }
2094                         if (remote_tag) {
2095                                 /*
2096                                  * If we have both vtags that's all we match
2097                                  * on
2098                                  */
2099                                 if (stcb->asoc.peer_vtag == remote_tag) {
2100                                         /*
2101                                          * If both tags match we consider it
2102                                          * conclusive and check NO
2103                                          * source/destination addresses
2104                                          */
2105                                         goto conclusive;
2106                                 }
2107                         }
2108                         if (skip_src_check) {
2109                 conclusive:
2110                                 if (from) {
2111                                         net = sctp_findnet(stcb, from);
2112                                 } else {
2113                                         *netp = NULL;   /* unknown */
2114                                 }
2115                                 if (inp_p)
2116                                         *inp_p = stcb->sctp_ep;
2117                                 SCTP_INP_INFO_RUNLOCK();
2118                                 return (stcb);
2119                         }
2120                         net = sctp_findnet(stcb, from);
2121                         if (net) {
2122                                 /* yep its him. */
2123                                 *netp = net;
2124                                 SCTP_STAT_INCR(sctps_vtagexpress);
2125                                 *inp_p = stcb->sctp_ep;
2126                                 SCTP_INP_INFO_RUNLOCK();
2127                                 return (stcb);
2128                         } else {
2129                                 /*
2130                                  * not him, this should only happen in rare
2131                                  * cases so I peg it.
2132                                  */
2133                                 SCTP_STAT_INCR(sctps_vtagbogus);
2134                         }
2135                 }
2136                 SCTP_TCB_UNLOCK(stcb);
2137         }
2138         SCTP_INP_INFO_RUNLOCK();
2139         return (NULL);
2140 }
2141
2142 /*
2143  * Find an association with the pointer to the inbound IP packet. This can be
2144  * a IPv4 or IPv6 packet.
2145  */
2146 struct sctp_tcb *
2147 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
2148     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2149     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2150 {
2151         int find_tcp_pool;
2152         struct ip *iph;
2153         struct sctp_tcb *retval;
2154         struct sockaddr_storage to_store, from_store;
2155         struct sockaddr *to = (struct sockaddr *)&to_store;
2156         struct sockaddr *from = (struct sockaddr *)&from_store;
2157         struct sctp_inpcb *inp;
2158
2159         iph = mtod(m, struct ip *);
2160         switch (iph->ip_v) {
2161 #ifdef INET
2162         case IPVERSION:
2163                 {
2164                         /* its IPv4 */
2165                         struct sockaddr_in *from4;
2166
2167                         from4 = (struct sockaddr_in *)&from_store;
2168                         bzero(from4, sizeof(*from4));
2169                         from4->sin_family = AF_INET;
2170                         from4->sin_len = sizeof(struct sockaddr_in);
2171                         from4->sin_addr.s_addr = iph->ip_src.s_addr;
2172                         from4->sin_port = sh->src_port;
2173                         break;
2174                 }
2175 #endif
2176 #ifdef INET6
2177         case IPV6_VERSION >> 4:
2178                 {
2179                         /* its IPv6 */
2180                         struct ip6_hdr *ip6;
2181                         struct sockaddr_in6 *from6;
2182
2183                         ip6 = mtod(m, struct ip6_hdr *);
2184                         from6 = (struct sockaddr_in6 *)&from_store;
2185                         bzero(from6, sizeof(*from6));
2186                         from6->sin6_family = AF_INET6;
2187                         from6->sin6_len = sizeof(struct sockaddr_in6);
2188                         from6->sin6_addr = ip6->ip6_src;
2189                         from6->sin6_port = sh->src_port;
2190                         /* Get the scopes in properly to the sin6 addr's */
2191                         /* we probably don't need these operations */
2192                         (void)sa6_recoverscope(from6);
2193                         sa6_embedscope(from6, MODULE_GLOBAL(ip6_use_defzone));
2194                         break;
2195                 }
2196 #endif
2197         default:
2198                 /* Currently not supported. */
2199                 return (NULL);
2200         }
2201
2202
2203         switch (iph->ip_v) {
2204 #ifdef INET
2205         case IPVERSION:
2206                 {
2207                         /* its IPv4 */
2208                         struct sockaddr_in *to4;
2209
2210                         to4 = (struct sockaddr_in *)&to_store;
2211                         bzero(to4, sizeof(*to4));
2212                         to4->sin_family = AF_INET;
2213                         to4->sin_len = sizeof(struct sockaddr_in);
2214                         to4->sin_addr.s_addr = iph->ip_dst.s_addr;
2215                         to4->sin_port = sh->dest_port;
2216                         break;
2217                 }
2218 #endif
2219 #ifdef INET6
2220         case IPV6_VERSION >> 4:
2221                 {
2222                         /* its IPv6 */
2223                         struct ip6_hdr *ip6;
2224                         struct sockaddr_in6 *to6;
2225
2226                         ip6 = mtod(m, struct ip6_hdr *);
2227                         to6 = (struct sockaddr_in6 *)&to_store;
2228                         bzero(to6, sizeof(*to6));
2229                         to6->sin6_family = AF_INET6;
2230                         to6->sin6_len = sizeof(struct sockaddr_in6);
2231                         to6->sin6_addr = ip6->ip6_dst;
2232                         to6->sin6_port = sh->dest_port;
2233                         /* Get the scopes in properly to the sin6 addr's */
2234                         /* we probably don't need these operations */
2235                         (void)sa6_recoverscope(to6);
2236                         sa6_embedscope(to6, MODULE_GLOBAL(ip6_use_defzone));
2237                         break;
2238                 }
2239 #endif
2240         default:
2241                 /* TSNH */
2242                 break;
2243         }
2244         if (sh->v_tag) {
2245                 /* we only go down this path if vtag is non-zero */
2246                 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag),
2247                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2248                 if (retval) {
2249                         return (retval);
2250                 }
2251         }
2252         find_tcp_pool = 0;
2253         if ((ch->chunk_type != SCTP_INITIATION) &&
2254             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2255             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2256             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2257                 /* Other chunk types go to the tcp pool. */
2258                 find_tcp_pool = 1;
2259         }
2260         if (inp_p) {
2261                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
2262                     find_tcp_pool, vrf_id);
2263                 inp = *inp_p;
2264         } else {
2265                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
2266                     find_tcp_pool, vrf_id);
2267         }
2268         SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp);
2269         if (retval == NULL && inp) {
2270                 /* Found a EP but not this address */
2271                 if ((ch->chunk_type == SCTP_INITIATION) ||
2272                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2273                         /*-
2274                          * special hook, we do NOT return linp or an
2275                          * association that is linked to an existing
2276                          * association that is under the TCP pool (i.e. no
2277                          * listener exists). The endpoint finding routine
2278                          * will always find a listener before examining the
2279                          * TCP pool.
2280                          */
2281                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2282                                 if (inp_p) {
2283                                         *inp_p = NULL;
2284                                 }
2285                                 return (NULL);
2286                         }
2287                         retval = sctp_findassociation_special_addr(m, iphlen,
2288                             offset, sh, &inp, netp, to);
2289                         if (inp_p != NULL) {
2290                                 *inp_p = inp;
2291                         }
2292                 }
2293         }
2294         SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval);
2295         return (retval);
2296 }
2297
2298 /*
2299  * lookup an association by an ASCONF lookup address.
2300  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2301  */
2302 struct sctp_tcb *
2303 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
2304     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2305 {
2306         struct sctp_tcb *stcb;
2307         struct sockaddr_storage local_store, remote_store;
2308         struct sockaddr *to;
2309         struct ip *iph;
2310         struct sctp_paramhdr parm_buf, *phdr;
2311         int ptype;
2312         int zero_address = 0;
2313
2314 #ifdef INET
2315         struct sockaddr_in *sin;
2316
2317 #endif
2318 #ifdef INET6
2319         struct ip6_hdr *ip6;
2320         struct sockaddr_in6 *sin6;
2321
2322 #endif
2323
2324         memset(&local_store, 0, sizeof(local_store));
2325         memset(&remote_store, 0, sizeof(remote_store));
2326         to = (struct sockaddr *)&local_store;
2327         /* First get the destination address setup too. */
2328         iph = mtod(m, struct ip *);
2329         switch (iph->ip_v) {
2330 #ifdef INET
2331         case IPVERSION:
2332                 /* its IPv4 */
2333                 sin = (struct sockaddr_in *)&local_store;
2334                 sin->sin_family = AF_INET;
2335                 sin->sin_len = sizeof(*sin);
2336                 sin->sin_port = sh->dest_port;
2337                 sin->sin_addr.s_addr = iph->ip_dst.s_addr;
2338                 break;
2339 #endif
2340 #ifdef INET6
2341         case IPV6_VERSION >> 4:
2342                 /* its IPv6 */
2343                 ip6 = mtod(m, struct ip6_hdr *);
2344                 sin6 = (struct sockaddr_in6 *)&local_store;
2345                 sin6->sin6_family = AF_INET6;
2346                 sin6->sin6_len = sizeof(*sin6);
2347                 sin6->sin6_port = sh->dest_port;
2348                 sin6->sin6_addr = ip6->ip6_dst;
2349                 break;
2350 #endif
2351         default:
2352                 return NULL;
2353         }
2354
2355         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2356             &parm_buf, sizeof(struct sctp_paramhdr));
2357         if (phdr == NULL) {
2358                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2359                     __FUNCTION__);
2360                 return NULL;
2361         }
2362         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2363         /* get the correlation address */
2364         switch (ptype) {
2365 #ifdef INET6
2366         case SCTP_IPV6_ADDRESS:
2367                 {
2368                         /* ipv6 address param */
2369                         struct sctp_ipv6addr_param *p6, p6_buf;
2370
2371                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2372                                 return NULL;
2373                         }
2374                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2375                             offset + sizeof(struct sctp_asconf_chunk),
2376                             &p6_buf.ph, sizeof(*p6));
2377                         if (p6 == NULL) {
2378                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2379                                     __FUNCTION__);
2380                                 return (NULL);
2381                         }
2382                         sin6 = (struct sockaddr_in6 *)&remote_store;
2383                         sin6->sin6_family = AF_INET6;
2384                         sin6->sin6_len = sizeof(*sin6);
2385                         sin6->sin6_port = sh->src_port;
2386                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2387                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2388                                 zero_address = 1;
2389                         break;
2390                 }
2391 #endif
2392 #ifdef INET
2393         case SCTP_IPV4_ADDRESS:
2394                 {
2395                         /* ipv4 address param */
2396                         struct sctp_ipv4addr_param *p4, p4_buf;
2397
2398                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2399                                 return NULL;
2400                         }
2401                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2402                             offset + sizeof(struct sctp_asconf_chunk),
2403                             &p4_buf.ph, sizeof(*p4));
2404                         if (p4 == NULL) {
2405                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2406                                     __FUNCTION__);
2407                                 return (NULL);
2408                         }
2409                         sin = (struct sockaddr_in *)&remote_store;
2410                         sin->sin_family = AF_INET;
2411                         sin->sin_len = sizeof(*sin);
2412                         sin->sin_port = sh->src_port;
2413                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2414                         if (sin->sin_addr.s_addr == INADDR_ANY)
2415                                 zero_address = 1;
2416                         break;
2417                 }
2418 #endif
2419         default:
2420                 /* invalid address param type */
2421                 return NULL;
2422         }
2423
2424         if (zero_address) {
2425                 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p,
2426                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2427                 /*
2428                  * printf("findassociation_ep_asconf: zero lookup address
2429                  * finds stcb 0x%x\n", (uint32_t)stcb);
2430                  */
2431         } else {
2432                 stcb = sctp_findassociation_ep_addr(inp_p,
2433                     (struct sockaddr *)&remote_store, netp,
2434                     to, NULL);
2435         }
2436         return (stcb);
2437 }
2438
2439
2440 /*
2441  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2442  * addresses. This way if we don't get a bind we by default pick a ephemeral
2443  * port with all addresses bound.
2444  */
2445 int
2446 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2447 {
2448         /*
2449          * we get called when a new endpoint starts up. We need to allocate
2450          * the sctp_inpcb structure from the zone and init it. Mark it as
2451          * unbound and find a port that we can use as an ephemeral with
2452          * INADDR_ANY. If the user binds later no problem we can then add in
2453          * the specific addresses. And setup the default parameters for the
2454          * EP.
2455          */
2456         int i, error;
2457         struct sctp_inpcb *inp;
2458         struct sctp_pcb *m;
2459         struct timeval time;
2460         sctp_sharedkey_t *null_key;
2461
2462         error = 0;
2463
2464         SCTP_INP_INFO_WLOCK();
2465         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2466         if (inp == NULL) {
2467                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2468                 SCTP_INP_INFO_WUNLOCK();
2469                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2470                 return (ENOBUFS);
2471         }
2472         /* zap it */
2473         bzero(inp, sizeof(*inp));
2474
2475         /* bump generations */
2476         /* setup socket pointers */
2477         inp->sctp_socket = so;
2478         inp->ip_inp.inp.inp_socket = so;
2479 #ifdef INET6
2480         if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2481                 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2482         }
2483 #endif
2484         inp->sctp_associd_counter = 1;
2485         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2486         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2487         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2488         inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable);
2489         /* init the small hash table we use to track asocid <-> tcb */
2490         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2491         if (inp->sctp_asocidhash == NULL) {
2492                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2493                 SCTP_INP_INFO_WUNLOCK();
2494                 return (ENOBUFS);
2495         }
2496 #ifdef IPSEC
2497         {
2498                 struct inpcbpolicy *pcb_sp = NULL;
2499
2500                 error = ipsec_init_policy(so, &pcb_sp);
2501                 /* Arrange to share the policy */
2502                 inp->ip_inp.inp.inp_sp = pcb_sp;
2503                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2504         }
2505         if (error != 0) {
2506                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2507                 SCTP_INP_INFO_WUNLOCK();
2508                 return error;
2509         }
2510 #endif                          /* IPSEC */
2511         SCTP_INCR_EP_COUNT();
2512         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2513         SCTP_INP_INFO_WUNLOCK();
2514
2515         so->so_pcb = (caddr_t)inp;
2516
2517         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2518                 /* UDP style socket */
2519                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2520                     SCTP_PCB_FLAGS_UNBOUND);
2521                 /* Be sure it is NON-BLOCKING IO for UDP */
2522                 /* SCTP_SET_SO_NBIO(so); */
2523         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2524                 /* TCP style socket */
2525                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2526                     SCTP_PCB_FLAGS_UNBOUND);
2527                 /* Be sure we have blocking IO by default */
2528                 SCTP_CLEAR_SO_NBIO(so);
2529         } else {
2530                 /*
2531                  * unsupported socket type (RAW, etc)- in case we missed it
2532                  * in protosw
2533                  */
2534                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2535                 so->so_pcb = NULL;
2536                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2537                 return (EOPNOTSUPP);
2538         }
2539         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2540                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2541                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2542         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2543                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2544                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2545         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2546                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2547                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2548         }
2549         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2550             &inp->sctp_hashmark);
2551         if (inp->sctp_tcbhash == NULL) {
2552                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2553                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2554                 so->so_pcb = NULL;
2555                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2556                 return (ENOBUFS);
2557         }
2558         inp->def_vrf_id = vrf_id;
2559
2560         SCTP_INP_INFO_WLOCK();
2561         SCTP_INP_LOCK_INIT(inp);
2562         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2563         SCTP_INP_READ_INIT(inp);
2564         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2565         /* lock the new ep */
2566         SCTP_INP_WLOCK(inp);
2567
2568         /* add it to the info area */
2569         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2570         SCTP_INP_INFO_WUNLOCK();
2571
2572         TAILQ_INIT(&inp->read_queue);
2573         LIST_INIT(&inp->sctp_addr_list);
2574
2575         LIST_INIT(&inp->sctp_asoc_list);
2576
2577 #ifdef SCTP_TRACK_FREED_ASOCS
2578         /* TEMP CODE */
2579         LIST_INIT(&inp->sctp_asoc_free_list);
2580 #endif
2581         /* Init the timer structure for signature change */
2582         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2583         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2584
2585         /* now init the actual endpoint default data */
2586         m = &inp->sctp_ep;
2587
2588         /* setup the base timeout information */
2589         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2590         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2591         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2592         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2593         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2594         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2595         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2596         /* all max/min max are in ms */
2597         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2598         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2599         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2600         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2601         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2602
2603         m->max_open_streams_intome = MAX_SCTP_STREAMS;
2604
2605         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2606         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2607         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2608         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2609         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2610         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2611         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2612         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2613
2614         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2615         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2616         /* number of streams to pre-open on a association */
2617         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2618
2619         /* Add adaptation cookie */
2620         m->adaptation_layer_indicator = 0x504C5253;
2621
2622         /* seed random number generator */
2623         m->random_counter = 1;
2624         m->store_at = SCTP_SIGNATURE_SIZE;
2625         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2626         sctp_fill_random_store(m);
2627
2628         /* Minimum cookie size */
2629         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2630             sizeof(struct sctp_state_cookie);
2631         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2632
2633         /* Setup the initial secret */
2634         (void)SCTP_GETTIME_TIMEVAL(&time);
2635         m->time_of_secret_change = time.tv_sec;
2636
2637         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2638                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2639         }
2640         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2641
2642         /* How long is a cookie good for ? */
2643         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2644         /*
2645          * Initialize authentication parameters
2646          */
2647         m->local_hmacs = sctp_default_supported_hmaclist();
2648         m->local_auth_chunks = sctp_alloc_chunklist();
2649         m->default_dscp = 0;
2650 #ifdef INET6
2651         m->default_flowlabel = 0;
2652 #endif
2653         sctp_auth_set_default_chunks(m->local_auth_chunks);
2654         LIST_INIT(&m->shared_keys);
2655         /* add default NULL key as key id 0 */
2656         null_key = sctp_alloc_sharedkey();
2657         sctp_insert_sharedkey(&m->shared_keys, null_key);
2658         SCTP_INP_WUNLOCK(inp);
2659 #ifdef SCTP_LOG_CLOSING
2660         sctp_log_closing(inp, NULL, 12);
2661 #endif
2662         return (error);
2663 }
2664
2665
2666 void
2667 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2668     struct sctp_tcb *stcb)
2669 {
2670         struct sctp_nets *net;
2671         uint16_t lport, rport;
2672         struct sctppcbhead *head;
2673         struct sctp_laddr *laddr, *oladdr;
2674
2675         atomic_add_int(&stcb->asoc.refcnt, 1);
2676         SCTP_TCB_UNLOCK(stcb);
2677         SCTP_INP_INFO_WLOCK();
2678         SCTP_INP_WLOCK(old_inp);
2679         SCTP_INP_WLOCK(new_inp);
2680         SCTP_TCB_LOCK(stcb);
2681         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2682
2683         new_inp->sctp_ep.time_of_secret_change =
2684             old_inp->sctp_ep.time_of_secret_change;
2685         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2686             sizeof(old_inp->sctp_ep.secret_key));
2687         new_inp->sctp_ep.current_secret_number =
2688             old_inp->sctp_ep.current_secret_number;
2689         new_inp->sctp_ep.last_secret_number =
2690             old_inp->sctp_ep.last_secret_number;
2691         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2692
2693         /* make it so new data pours into the new socket */
2694         stcb->sctp_socket = new_inp->sctp_socket;
2695         stcb->sctp_ep = new_inp;
2696
2697         /* Copy the port across */
2698         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2699         rport = stcb->rport;
2700         /* Pull the tcb from the old association */
2701         LIST_REMOVE(stcb, sctp_tcbhash);
2702         LIST_REMOVE(stcb, sctp_tcblist);
2703         if (stcb->asoc.in_asocid_hash) {
2704                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2705         }
2706         /* Now insert the new_inp into the TCP connected hash */
2707         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2708
2709         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2710         /* Its safe to access */
2711         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2712
2713         /* Now move the tcb into the endpoint list */
2714         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2715         /*
2716          * Question, do we even need to worry about the ep-hash since we
2717          * only have one connection? Probably not :> so lets get rid of it
2718          * and not suck up any kernel memory in that.
2719          */
2720         if (stcb->asoc.in_asocid_hash) {
2721                 struct sctpasochead *lhd;
2722
2723                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2724                     new_inp->hashasocidmark)];
2725                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2726         }
2727         /* Ok. Let's restart timer. */
2728         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2729                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2730                     stcb, net);
2731         }
2732
2733         SCTP_INP_INFO_WUNLOCK();
2734         if (new_inp->sctp_tcbhash != NULL) {
2735                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2736                 new_inp->sctp_tcbhash = NULL;
2737         }
2738         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2739                 /* Subset bound, so copy in the laddr list from the old_inp */
2740                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2741                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2742                         if (laddr == NULL) {
2743                                 /*
2744                                  * Gak, what can we do? This assoc is really
2745                                  * HOSED. We probably should send an abort
2746                                  * here.
2747                                  */
2748                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2749                                 continue;
2750                         }
2751                         SCTP_INCR_LADDR_COUNT();
2752                         bzero(laddr, sizeof(*laddr));
2753                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2754                         laddr->ifa = oladdr->ifa;
2755                         atomic_add_int(&laddr->ifa->refcount, 1);
2756                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2757                             sctp_nxt_addr);
2758                         new_inp->laddr_count++;
2759                         if (oladdr == stcb->asoc.last_used_address) {
2760                                 stcb->asoc.last_used_address = laddr;
2761                         }
2762                 }
2763         }
2764         /*
2765          * Now any running timers need to be adjusted since we really don't
2766          * care if they are running or not just blast in the new_inp into
2767          * all of them.
2768          */
2769
2770         stcb->asoc.dack_timer.ep = (void *)new_inp;
2771         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2772         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2773         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2774         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2775         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2776         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2777         /* now what about the nets? */
2778         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2779                 net->pmtu_timer.ep = (void *)new_inp;
2780                 net->hb_timer.ep = (void *)new_inp;
2781                 net->rxt_timer.ep = (void *)new_inp;
2782         }
2783         SCTP_INP_WUNLOCK(new_inp);
2784         SCTP_INP_WUNLOCK(old_inp);
2785 }
2786
2787
2788
2789
2790 /* sctp_ifap is used to bypass normal local address validation checks */
2791 int
2792 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2793     struct sctp_ifa *sctp_ifap, struct thread *p)
2794 {
2795         /* bind a ep to a socket address */
2796         struct sctppcbhead *head;
2797         struct sctp_inpcb *inp, *inp_tmp;
2798         struct inpcb *ip_inp;
2799         int port_reuse_active = 0;
2800         int bindall;
2801         uint16_t lport;
2802         int error;
2803         uint32_t vrf_id;
2804
2805         lport = 0;
2806         error = 0;
2807         bindall = 1;
2808         inp = (struct sctp_inpcb *)so->so_pcb;
2809         ip_inp = (struct inpcb *)so->so_pcb;
2810 #ifdef SCTP_DEBUG
2811         if (addr) {
2812                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
2813                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2814                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
2815                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2816         }
2817 #endif
2818         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2819                 /* already did a bind, subsequent binds NOT allowed ! */
2820                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2821                 return (EINVAL);
2822         }
2823 #ifdef INVARIANTS
2824         if (p == NULL)
2825                 panic("null proc/thread");
2826 #endif
2827         if (addr != NULL) {
2828                 switch (addr->sa_family) {
2829 #ifdef INET
2830                 case AF_INET:
2831                         {
2832                                 struct sockaddr_in *sin;
2833
2834                                 /* IPV6_V6ONLY socket? */
2835                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2836                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2837                                         return (EINVAL);
2838                                 }
2839                                 if (addr->sa_len != sizeof(*sin)) {
2840                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2841                                         return (EINVAL);
2842                                 }
2843                                 sin = (struct sockaddr_in *)addr;
2844                                 lport = sin->sin_port;
2845                                 /*
2846                                  * For LOOPBACK the prison_local_ip4() call
2847                                  * will transmute the ip address to the
2848                                  * proper value.
2849                                  */
2850                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2851                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2852                                         return (error);
2853                                 }
2854                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2855                                         bindall = 0;
2856                                 }
2857                                 break;
2858                         }
2859 #endif
2860 #ifdef INET6
2861                 case AF_INET6:
2862                         {
2863                                 /*
2864                                  * Only for pure IPv6 Address. (No IPv4
2865                                  * Mapped!)
2866                                  */
2867                                 struct sockaddr_in6 *sin6;
2868
2869                                 sin6 = (struct sockaddr_in6 *)addr;
2870
2871                                 if (addr->sa_len != sizeof(*sin6)) {
2872                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2873                                         return (EINVAL);
2874                                 }
2875                                 lport = sin6->sin6_port;
2876
2877                                 /*
2878                                  * For LOOPBACK the prison_local_ip6() call
2879                                  * will transmute the ipv6 address to the
2880                                  * proper value.
2881                                  */
2882                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2883                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2884                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2885                                         return (error);
2886                                 }
2887                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2888                                         bindall = 0;
2889                                         /* KAME hack: embed scopeid */
2890                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2891                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2892                                                 return (EINVAL);
2893                                         }
2894                                 }
2895                                 /* this must be cleared for ifa_ifwithaddr() */
2896                                 sin6->sin6_scope_id = 0;
2897                                 break;
2898                         }
2899 #endif
2900                 default:
2901                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2902                         return (EAFNOSUPPORT);
2903                 }
2904         }
2905         SCTP_INP_INFO_WLOCK();
2906         SCTP_INP_WLOCK(inp);
2907         /* Setup a vrf_id to be the default for the non-bind-all case. */
2908         vrf_id = inp->def_vrf_id;
2909
2910         /* increase our count due to the unlock we do */
2911         SCTP_INP_INCR_REF(inp);
2912         if (lport) {
2913                 /*
2914                  * Did the caller specify a port? if so we must see if a ep
2915                  * already has this one bound.
2916                  */
2917                 /* got to be root to get at low ports */
2918                 if (ntohs(lport) < IPPORT_RESERVED) {
2919                         if (p && (error =
2920                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2921                             )) {
2922                                 SCTP_INP_DECR_REF(inp);
2923                                 SCTP_INP_WUNLOCK(inp);
2924                                 SCTP_INP_INFO_WUNLOCK();
2925                                 return (error);
2926                         }
2927                 }
2928                 if (p == NULL) {
2929                         SCTP_INP_DECR_REF(inp);
2930                         SCTP_INP_WUNLOCK(inp);
2931                         SCTP_INP_INFO_WUNLOCK();
2932                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2933                         return (error);
2934                 }
2935                 SCTP_INP_WUNLOCK(inp);
2936                 if (bindall) {
2937                         vrf_id = inp->def_vrf_id;
2938                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2939                         if (inp_tmp != NULL) {
2940                                 /*
2941                                  * lock guy returned and lower count note
2942                                  * that we are not bound so inp_tmp should
2943                                  * NEVER be inp. And it is this inp
2944                                  * (inp_tmp) that gets the reference bump,
2945                                  * so we must lower it.
2946                                  */
2947                                 SCTP_INP_DECR_REF(inp_tmp);
2948                                 /* unlock info */
2949                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2950                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2951                                         /*
2952                                          * Ok, must be one-2-one and
2953                                          * allowing port re-use
2954                                          */
2955                                         port_reuse_active = 1;
2956                                         goto continue_anyway;
2957                                 }
2958                                 SCTP_INP_DECR_REF(inp);
2959                                 SCTP_INP_INFO_WUNLOCK();
2960                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2961                                 return (EADDRINUSE);
2962                         }
2963                 } else {
2964                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2965                         if (inp_tmp != NULL) {
2966                                 /*
2967                                  * lock guy returned and lower count note
2968                                  * that we are not bound so inp_tmp should
2969                                  * NEVER be inp. And it is this inp
2970                                  * (inp_tmp) that gets the reference bump,
2971                                  * so we must lower it.
2972                                  */
2973                                 SCTP_INP_DECR_REF(inp_tmp);
2974                                 /* unlock info */
2975                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2976                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2977                                         /*
2978                                          * Ok, must be one-2-one and
2979                                          * allowing port re-use
2980                                          */
2981                                         port_reuse_active = 1;
2982                                         goto continue_anyway;
2983                                 }
2984                                 SCTP_INP_DECR_REF(inp);
2985                                 SCTP_INP_INFO_WUNLOCK();
2986                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2987                                 return (EADDRINUSE);
2988                         }
2989                 }
2990 continue_anyway:
2991                 SCTP_INP_WLOCK(inp);
2992                 if (bindall) {
2993                         /* verify that no lport is not used by a singleton */
2994                         if ((port_reuse_active == 0) &&
2995                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))
2996                             ) {
2997                                 /* Sorry someone already has this one bound */
2998                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2999                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3000                                         port_reuse_active = 1;
3001                                 } else {
3002                                         SCTP_INP_DECR_REF(inp);
3003                                         SCTP_INP_WUNLOCK(inp);
3004                                         SCTP_INP_INFO_WUNLOCK();
3005                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3006                                         return (EADDRINUSE);
3007                                 }
3008                         }
3009                 }
3010         } else {
3011                 uint16_t first, last, candidate;
3012                 uint16_t count;
3013                 int done;
3014
3015                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3016                         first = MODULE_GLOBAL(ipport_hifirstauto);
3017                         last = MODULE_GLOBAL(ipport_hilastauto);
3018                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3019                         if (p && (error =
3020                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3021                             )) {
3022                                 SCTP_INP_DECR_REF(inp);
3023                                 SCTP_INP_WUNLOCK(inp);
3024                                 SCTP_INP_INFO_WUNLOCK();
3025                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3026                                 return (error);
3027                         }
3028                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3029                         last = MODULE_GLOBAL(ipport_lowlastauto);
3030                 } else {
3031                         first = MODULE_GLOBAL(ipport_firstauto);
3032                         last = MODULE_GLOBAL(ipport_lastauto);
3033                 }
3034                 if (first > last) {
3035                         uint16_t temp;
3036
3037                         temp = first;
3038                         first = last;
3039                         last = temp;
3040                 }
3041                 count = last - first + 1;       /* number of candidates */
3042                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3043
3044                 done = 0;
3045                 while (!done) {
3046                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3047                                 done = 1;
3048                         }
3049                         if (!done) {
3050                                 if (--count == 0) {
3051                                         SCTP_INP_DECR_REF(inp);
3052                                         SCTP_INP_WUNLOCK(inp);
3053                                         SCTP_INP_INFO_WUNLOCK();
3054                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3055                                         return (EADDRINUSE);
3056                                 }
3057                                 if (candidate == last)
3058                                         candidate = first;
3059                                 else
3060                                         candidate = candidate + 1;
3061                         }
3062                 }
3063                 lport = htons(candidate);
3064         }
3065         SCTP_INP_DECR_REF(inp);
3066         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3067             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3068                 /*
3069                  * this really should not happen. The guy did a non-blocking
3070                  * bind and then did a close at the same time.
3071                  */
3072                 SCTP_INP_WUNLOCK(inp);
3073                 SCTP_INP_INFO_WUNLOCK();
3074                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3075                 return (EINVAL);
3076         }
3077         /* ok we look clear to give out this port, so lets setup the binding */
3078         if (bindall) {
3079                 /* binding to all addresses, so just set in the proper flags */
3080                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3081                 /* set the automatic addr changes from kernel flag */
3082                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3083                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3084                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3085                 } else {
3086                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3087                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3088                 }
3089                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3090                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3091                 } else {
3092                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3093                 }
3094                 /*
3095                  * set the automatic mobility_base from kernel flag (by
3096                  * micchie)
3097                  */
3098                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3099                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3100                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3101                 } else {
3102                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3103                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3104                 }
3105                 /*
3106                  * set the automatic mobility_fasthandoff from kernel flag
3107                  * (by micchie)
3108                  */
3109                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3110                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3111                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3112                 } else {
3113                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3114                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3115                 }
3116         } else {
3117                 /*
3118                  * bind specific, make sure flags is off and add a new
3119                  * address structure to the sctp_addr_list inside the ep
3120                  * structure.
3121                  *
3122                  * We will need to allocate one and insert it at the head. The
3123                  * socketopt call can just insert new addresses in there as
3124                  * well. It will also have to do the embed scope kame hack
3125                  * too (before adding).
3126                  */
3127                 struct sctp_ifa *ifa;
3128                 struct sockaddr_storage store_sa;
3129
3130                 memset(&store_sa, 0, sizeof(store_sa));
3131                 switch (addr->sa_family) {
3132                 case AF_INET:
3133                         {
3134                                 struct sockaddr_in *sin;
3135
3136                                 sin = (struct sockaddr_in *)&store_sa;
3137                                 memcpy(sin, addr, sizeof(struct sockaddr_in));
3138                                 sin->sin_port = 0;
3139                                 break;
3140                         }
3141                 case AF_INET6:
3142                         {
3143                                 struct sockaddr_in6 *sin6;
3144
3145                                 sin6 = (struct sockaddr_in6 *)&store_sa;
3146                                 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3147                                 sin6->sin6_port = 0;
3148                                 break;
3149                         }
3150                 default:
3151                         break;
3152                 }
3153                 /*
3154                  * first find the interface with the bound address need to
3155                  * zero out the port to find the address! yuck! can't do
3156                  * this earlier since need port for sctp_pcb_findep()
3157                  */
3158                 if (sctp_ifap != NULL)
3159                         ifa = sctp_ifap;
3160                 else {
3161                         /*
3162                          * Note for BSD we hit here always other O/S's will
3163                          * pass things in via the sctp_ifap argument
3164                          * (Panda).
3165                          */
3166                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3167                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3168                 }
3169                 if (ifa == NULL) {
3170                         /* Can't find an interface with that address */
3171                         SCTP_INP_WUNLOCK(inp);
3172                         SCTP_INP_INFO_WUNLOCK();
3173                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3174                         return (EADDRNOTAVAIL);
3175                 }
3176 #ifdef INET6
3177                 if (addr->sa_family == AF_INET6) {
3178                         /* GAK, more FIXME IFA lock? */
3179                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3180                                 /* Can't bind a non-existent addr. */
3181                                 SCTP_INP_WUNLOCK(inp);
3182                                 SCTP_INP_INFO_WUNLOCK();
3183                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3184                                 return (EINVAL);
3185                         }
3186                 }
3187 #endif
3188                 /* we're not bound all */
3189                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3190                 /* allow bindx() to send ASCONF's for binding changes */
3191                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3192                 /* clear automatic addr changes from kernel flag */
3193                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3194
3195                 /* add this address to the endpoint list */
3196                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3197                 if (error != 0) {
3198                         SCTP_INP_WUNLOCK(inp);
3199                         SCTP_INP_INFO_WUNLOCK();
3200                         return (error);
3201                 }
3202                 inp->laddr_count++;
3203         }
3204         /* find the bucket */
3205         if (port_reuse_active) {
3206                 /* Put it into tcp 1-2-1 hash */
3207                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3208                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3209         } else {
3210                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3211         }
3212         /* put it in the bucket */
3213         LIST_INSERT_HEAD(head, inp, sctp_hash);
3214         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3215             head, ntohs(lport), port_reuse_active);
3216         /* set in the port */
3217         inp->sctp_lport = lport;
3218
3219         /* turn off just the unbound flag */
3220         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3221         SCTP_INP_WUNLOCK(inp);
3222         SCTP_INP_INFO_WUNLOCK();
3223         return (0);
3224 }
3225
3226
3227 static void
3228 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3229 {
3230         struct sctp_iterator *it, *nit;
3231
3232         /*
3233          * We enter with the only the ITERATOR_LOCK in place and a write
3234          * lock on the inp_info stuff.
3235          */
3236         it = sctp_it_ctl.cur_it;
3237         if (it && (it->vn != curvnet)) {
3238                 /* Its not looking at our VNET */
3239                 return;
3240         }
3241         if (it && (it->inp == inp)) {
3242                 /*
3243                  * This is tricky and we hold the iterator lock, but when it
3244                  * returns and gets the lock (when we release it) the
3245                  * iterator will try to operate on inp. We need to stop that
3246                  * from happening. But of course the iterator has a
3247                  * reference on the stcb and inp. We can mark it and it will
3248                  * stop.
3249                  *
3250                  * If its a single iterator situation, we set the end iterator
3251                  * flag. Otherwise we set the iterator to go to the next
3252                  * inp.
3253                  *
3254                  */
3255                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3256                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3257                 } else {
3258                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3259                 }
3260         }
3261         /*
3262          * Now go through and remove any single reference to our inp that
3263          * may be still pending on the list
3264          */
3265         SCTP_IPI_ITERATOR_WQ_LOCK();
3266         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3267                 if (it->vn != curvnet) {
3268                         continue;
3269                 }
3270                 if (it->inp == inp) {
3271                         /* This one points to me is it inp specific? */
3272                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3273                                 /* Remove and free this one */
3274                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3275                                     it, sctp_nxt_itr);
3276                                 if (it->function_atend != NULL) {
3277                                         (*it->function_atend) (it->pointer, it->val);
3278                                 }
3279                                 SCTP_FREE(it, SCTP_M_ITER);
3280                         } else {
3281                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3282                                 if (it->inp) {
3283                                         SCTP_INP_INCR_REF(it->inp);
3284                                 }
3285                         }
3286                         /*
3287                          * When its put in the refcnt is incremented so decr
3288                          * it
3289                          */
3290                         SCTP_INP_DECR_REF(inp);
3291                 }
3292         }
3293         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3294 }
3295
3296 /* release sctp_inpcb unbind the port */
3297 void
3298 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3299 {
3300         /*
3301          * Here we free a endpoint. We must find it (if it is in the Hash
3302          * table) and remove it from there. Then we must also find it in the
3303          * overall list and remove it from there. After all removals are
3304          * complete then any timer has to be stopped. Then start the actual
3305          * freeing. a) Any local lists. b) Any associations. c) The hash of
3306          * all associations. d) finally the ep itself.
3307          */
3308         struct sctp_pcb *m;
3309         struct sctp_tcb *asoc, *nasoc;
3310         struct sctp_laddr *laddr, *nladdr;
3311         struct inpcb *ip_pcb;
3312         struct socket *so;
3313         int being_refed = 0;
3314         struct sctp_queued_to_read *sq, *nsq;
3315         int cnt;
3316         sctp_sharedkey_t *shared_key, *nshared_key;
3317
3318
3319 #ifdef SCTP_LOG_CLOSING
3320         sctp_log_closing(inp, NULL, 0);
3321 #endif
3322         SCTP_ITERATOR_LOCK();
3323         /* mark any iterators on the list or being processed */
3324         sctp_iterator_inp_being_freed(inp);
3325         SCTP_ITERATOR_UNLOCK();
3326         so = inp->sctp_socket;
3327         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3328                 /* been here before.. eeks.. get out of here */
3329                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3330 #ifdef SCTP_LOG_CLOSING
3331                 sctp_log_closing(inp, NULL, 1);
3332 #endif
3333                 return;
3334         }
3335         SCTP_ASOC_CREATE_LOCK(inp);
3336         SCTP_INP_INFO_WLOCK();
3337
3338         SCTP_INP_WLOCK(inp);
3339         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3340                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3341                 /* socket is gone, so no more wakeups allowed */
3342                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3343                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3344                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3345
3346         }
3347         /* First time through we have the socket lock, after that no more. */
3348         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3349             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3350
3351         if (inp->control) {
3352                 sctp_m_freem(inp->control);
3353                 inp->control = NULL;
3354         }
3355         if (inp->pkt) {
3356                 sctp_m_freem(inp->pkt);
3357                 inp->pkt = NULL;
3358         }
3359         m = &inp->sctp_ep;
3360         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3361                                          * here but I will be nice :> (i.e.
3362                                          * ip_pcb = ep;) */
3363         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3364                 int cnt_in_sd;
3365
3366                 cnt_in_sd = 0;
3367                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3368                         SCTP_TCB_LOCK(asoc);
3369                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3370                                 /* Skip guys being freed */
3371                                 cnt_in_sd++;
3372                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3373                                         /*
3374                                          * Special case - we did not start a
3375                                          * kill timer on the asoc due to it
3376                                          * was not closed. So go ahead and
3377                                          * start it now.
3378                                          */
3379                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3380                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3381                                 }
3382                                 SCTP_TCB_UNLOCK(asoc);
3383                                 continue;
3384                         }
3385                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3386                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3387                             (asoc->asoc.total_output_queue_size == 0)) {
3388                                 /*
3389                                  * If we have data in queue, we don't want
3390                                  * to just free since the app may have done,
3391                                  * send()/close or connect/send/close. And
3392                                  * it wants the data to get across first.
3393                                  */
3394                                 /* Just abandon things in the front states */
3395                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3396                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3397                                         cnt_in_sd++;
3398                                 }
3399                                 continue;
3400                         }
3401                         /* Disconnect the socket please */
3402                         asoc->sctp_socket = NULL;
3403                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3404                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3405                             (asoc->asoc.control_pdapi) ||
3406                             (asoc->asoc.size_on_all_streams > 0) ||
3407                             (so && (so->so_rcv.sb_cc > 0))
3408                             ) {
3409                                 /* Left with Data unread */
3410                                 struct mbuf *op_err;
3411
3412                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3413                                     0, M_DONTWAIT, 1, MT_DATA);
3414                                 if (op_err) {
3415                                         /* Fill in the user initiated abort */
3416                                         struct sctp_paramhdr *ph;
3417                                         uint32_t *ippp;
3418
3419                                         SCTP_BUF_LEN(op_err) =
3420                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
3421                                         ph = mtod(op_err,
3422                                             struct sctp_paramhdr *);
3423                                         ph->param_type = htons(
3424                                             SCTP_CAUSE_USER_INITIATED_ABT);
3425                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
3426                                         ippp = (uint32_t *) (ph + 1);
3427                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
3428                                 }
3429                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3430 #if defined(SCTP_PANIC_ON_ABORT)
3431                                 panic("inpcb_free does an abort");
3432 #endif
3433                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3434                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3435                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3436                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3437                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3438                                 }
3439                                 if (sctp_free_assoc(inp, asoc,
3440                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3441                                         cnt_in_sd++;
3442                                 }
3443                                 continue;
3444                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3445                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3446                                     (asoc->asoc.stream_queue_cnt == 0)
3447                             ) {
3448                                 if (asoc->asoc.locked_on_sending) {
3449                                         goto abort_anyway;
3450                                 }
3451                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3452                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3453                                         struct sctp_nets *netp;
3454
3455                                         if (asoc->asoc.alternate) {
3456                                                 netp = asoc->asoc.alternate;
3457                                         } else {
3458                                                 netp = asoc->asoc.primary_destination;
3459                                         }
3460                                         /*
3461                                          * there is nothing queued to send,
3462                                          * so I send shutdown
3463                                          */
3464                                         sctp_send_shutdown(asoc, netp);
3465                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3466                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3467                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3468                                         }
3469                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3470                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3471                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3472                                             netp);
3473                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3474                                             asoc->asoc.primary_destination);
3475                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3476                                 }
3477                         } else {
3478                                 /* mark into shutdown pending */
3479                                 struct sctp_stream_queue_pending *sp;
3480
3481                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3482                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3483                                     asoc->asoc.primary_destination);
3484                                 if (asoc->asoc.locked_on_sending) {
3485                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3486                                             sctp_streamhead);
3487                                         if (sp == NULL) {
3488                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3489                                                     asoc->asoc.locked_on_sending,
3490                                                     asoc->asoc.locked_on_sending->stream_no);
3491                                         } else {
3492                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3493                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3494                                         }
3495                                 }
3496                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3497                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3498                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3499                                         struct mbuf *op_err;
3500
3501                         abort_anyway:
3502                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3503                                             0, M_DONTWAIT, 1, MT_DATA);
3504                                         if (op_err) {
3505                                                 /*
3506                                                  * Fill in the user
3507                                                  * initiated abort
3508                                                  */
3509                                                 struct sctp_paramhdr *ph;
3510                                                 uint32_t *ippp;
3511
3512                                                 SCTP_BUF_LEN(op_err) =
3513                                                     (sizeof(struct sctp_paramhdr) +
3514                                                     sizeof(uint32_t));
3515                                                 ph = mtod(op_err,
3516                                                     struct sctp_paramhdr *);
3517                                                 ph->param_type = htons(
3518                                                     SCTP_CAUSE_USER_INITIATED_ABT);
3519                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3520                                                 ippp = (uint32_t *) (ph + 1);
3521                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
3522                                         }
3523                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3524 #if defined(SCTP_PANIC_ON_ABORT)
3525                                         panic("inpcb_free does an abort");
3526 #endif
3527
3528                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3529                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3530                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3531                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3532                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3533                                         }
3534                                         if (sctp_free_assoc(inp, asoc,
3535                                             SCTP_PCBFREE_NOFORCE,
3536                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3537                                                 cnt_in_sd++;
3538                                         }
3539                                         continue;
3540                                 } else {
3541                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3542                                 }
3543                         }
3544                         cnt_in_sd++;
3545                         SCTP_TCB_UNLOCK(asoc);
3546                 }
3547                 /* now is there some left in our SHUTDOWN state? */
3548                 if (cnt_in_sd) {
3549 #ifdef SCTP_LOG_CLOSING
3550                         sctp_log_closing(inp, NULL, 2);
3551 #endif
3552                         inp->sctp_socket = NULL;
3553                         SCTP_INP_WUNLOCK(inp);
3554                         SCTP_ASOC_CREATE_UNLOCK(inp);
3555                         SCTP_INP_INFO_WUNLOCK();
3556                         return;
3557                 }
3558         }
3559         inp->sctp_socket = NULL;
3560         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3561             SCTP_PCB_FLAGS_UNBOUND) {
3562                 /*
3563                  * ok, this guy has been bound. It's port is somewhere in
3564                  * the SCTP_BASE_INFO(hash table). Remove it!
3565                  */
3566                 LIST_REMOVE(inp, sctp_hash);
3567                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3568         }
3569         /*
3570          * If there is a timer running to kill us, forget it, since it may
3571          * have a contest on the INP lock.. which would cause us to die ...
3572          */
3573         cnt = 0;
3574         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3575                 SCTP_TCB_LOCK(asoc);
3576                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3577                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3578                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3579                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3580                         }
3581                         cnt++;
3582                         SCTP_TCB_UNLOCK(asoc);
3583                         continue;
3584                 }
3585                 /* Free associations that are NOT killing us */
3586                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3587                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3588                         struct mbuf *op_err;
3589                         uint32_t *ippp;
3590
3591                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3592                             0, M_DONTWAIT, 1, MT_DATA);
3593                         if (op_err) {
3594                                 /* Fill in the user initiated abort */
3595                                 struct sctp_paramhdr *ph;
3596
3597                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
3598                                     sizeof(uint32_t));
3599                                 ph = mtod(op_err, struct sctp_paramhdr *);
3600                                 ph->param_type = htons(
3601                                     SCTP_CAUSE_USER_INITIATED_ABT);
3602                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3603                                 ippp = (uint32_t *) (ph + 1);
3604                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
3605
3606                         }
3607                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3608 #if defined(SCTP_PANIC_ON_ABORT)
3609                         panic("inpcb_free does an abort");
3610 #endif
3611                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3612                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3613                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3614                         cnt++;
3615                         SCTP_TCB_UNLOCK(asoc);
3616                         continue;
3617                 }
3618                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3619                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3620                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3621                 }
3622                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3623                         cnt++;
3624                 }
3625         }
3626         if (cnt) {
3627                 /* Ok we have someone out there that will kill us */
3628                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3629 #ifdef SCTP_LOG_CLOSING
3630                 sctp_log_closing(inp, NULL, 3);
3631 #endif
3632                 SCTP_INP_WUNLOCK(inp);
3633                 SCTP_ASOC_CREATE_UNLOCK(inp);
3634                 SCTP_INP_INFO_WUNLOCK();
3635                 return;
3636         }
3637         if (SCTP_INP_LOCK_CONTENDED(inp))
3638                 being_refed++;
3639         if (SCTP_INP_READ_CONTENDED(inp))
3640                 being_refed++;
3641         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3642                 being_refed++;
3643
3644         if ((inp->refcount) ||
3645             (being_refed) ||
3646             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3647                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3648 #ifdef SCTP_LOG_CLOSING
3649                 sctp_log_closing(inp, NULL, 4);
3650 #endif
3651                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3652                 SCTP_INP_WUNLOCK(inp);
3653                 SCTP_ASOC_CREATE_UNLOCK(inp);
3654                 SCTP_INP_INFO_WUNLOCK();
3655                 return;
3656         }
3657         inp->sctp_ep.signature_change.type = 0;
3658         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3659         /*
3660          * Remove it from the list .. last thing we need a lock for.
3661          */
3662         LIST_REMOVE(inp, sctp_list);
3663         SCTP_INP_WUNLOCK(inp);
3664         SCTP_ASOC_CREATE_UNLOCK(inp);
3665         SCTP_INP_INFO_WUNLOCK();
3666         /*
3667          * Now we release all locks. Since this INP cannot be found anymore
3668          * except possibly by the kill timer that might be running. We call
3669          * the drain function here. It should hit the case were it sees the
3670          * ACTIVE flag cleared and exit out freeing us to proceed and
3671          * destroy everything.
3672          */
3673         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3674                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3675         } else {
3676                 /* Probably un-needed */
3677                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3678         }
3679
3680 #ifdef SCTP_LOG_CLOSING
3681         sctp_log_closing(inp, NULL, 5);
3682 #endif
3683
3684
3685         if ((inp->sctp_asocidhash) != NULL) {
3686                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3687                 inp->sctp_asocidhash = NULL;
3688         }
3689         /* sa_ignore FREED_MEMORY */
3690         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3691                 /* Its only abandoned if it had data left */
3692                 if (sq->length)
3693                         SCTP_STAT_INCR(sctps_left_abandon);
3694
3695                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3696                 sctp_free_remote_addr(sq->whoFrom);
3697                 if (so)
3698                         so->so_rcv.sb_cc -= sq->length;
3699                 if (sq->data) {
3700                         sctp_m_freem(sq->data);
3701                         sq->data = NULL;
3702                 }
3703                 /*
3704                  * no need to free the net count, since at this point all
3705                  * assoc's are gone.
3706                  */
3707                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3708                 SCTP_DECR_READQ_COUNT();
3709         }
3710         /* Now the sctp_pcb things */
3711         /*
3712          * free each asoc if it is not already closed/free. we can't use the
3713          * macro here since le_next will get freed as part of the
3714          * sctp_free_assoc() call.
3715          */
3716         cnt = 0;
3717         if (so) {
3718 #ifdef IPSEC
3719                 ipsec_delete_pcbpolicy(ip_pcb);
3720 #endif                          /* IPSEC */
3721
3722                 /* Unlocks not needed since the socket is gone now */
3723         }
3724         if (ip_pcb->inp_options) {
3725                 (void)sctp_m_free(ip_pcb->inp_options);
3726                 ip_pcb->inp_options = 0;
3727         }
3728 #ifdef INET6
3729         if (ip_pcb->inp_vflag & INP_IPV6) {
3730                 struct in6pcb *in6p;
3731
3732                 in6p = (struct in6pcb *)inp;
3733                 ip6_freepcbopts(in6p->in6p_outputopts);
3734         }
3735 #endif                          /* INET6 */
3736         ip_pcb->inp_vflag = 0;
3737         /* free up authentication fields */
3738         if (inp->sctp_ep.local_auth_chunks != NULL)
3739                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3740         if (inp->sctp_ep.local_hmacs != NULL)
3741                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3742
3743         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3744                 LIST_REMOVE(shared_key, next);
3745                 sctp_free_sharedkey(shared_key);
3746                 /* sa_ignore FREED_MEMORY */
3747         }
3748
3749         /*
3750          * if we have an address list the following will free the list of
3751          * ifaddr's that are set into this ep. Again macro limitations here,
3752          * since the LIST_FOREACH could be a bad idea.
3753          */
3754         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3755                 sctp_remove_laddr(laddr);
3756         }
3757
3758 #ifdef SCTP_TRACK_FREED_ASOCS
3759         /* TEMP CODE */
3760         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3761                 LIST_REMOVE(asoc, sctp_tcblist);
3762                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3763                 SCTP_DECR_ASOC_COUNT();
3764         }
3765         /* *** END TEMP CODE *** */
3766 #endif
3767         /* Now lets see about freeing the EP hash table. */
3768         if (inp->sctp_tcbhash != NULL) {
3769                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3770                 inp->sctp_tcbhash = NULL;
3771         }
3772         /* Now we must put the ep memory back into the zone pool */
3773         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3774         SCTP_INP_LOCK_DESTROY(inp);
3775         SCTP_INP_READ_DESTROY(inp);
3776         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3777         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3778         SCTP_DECR_EP_COUNT();
3779 }
3780
3781
3782 struct sctp_nets *
3783 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3784 {
3785         struct sctp_nets *net;
3786
3787         /* locate the address */
3788         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3789                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3790                         return (net);
3791         }
3792         return (NULL);
3793 }
3794
3795
3796 int
3797 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3798 {
3799         struct sctp_ifa *sctp_ifa;
3800
3801         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3802         if (sctp_ifa) {
3803                 return (1);
3804         } else {
3805                 return (0);
3806         }
3807 }
3808
3809 /*
3810  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3811  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3812  * stats of stuff.
3813  */
3814 int
3815 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3816     struct sctp_nets **netp, int set_scope, int from)
3817 {
3818         /*
3819          * The following is redundant to the same lines in the
3820          * sctp_aloc_assoc() but is needed since others call the add address
3821          * function
3822          */
3823         struct sctp_nets *net, *netfirst;
3824         int addr_inscope;
3825
3826         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3827             from);
3828         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3829
3830         netfirst = sctp_findnet(stcb, newaddr);
3831         if (netfirst) {
3832                 /*
3833                  * Lie and return ok, we don't want to make the association
3834                  * go away for this behavior. It will happen in the TCP
3835                  * model in a connected socket. It does not reach the hash
3836                  * table until after the association is built so it can't be
3837                  * found. Mark as reachable, since the initial creation will
3838                  * have been cleared and the NOT_IN_ASSOC flag will have
3839                  * been added... and we don't want to end up removing it
3840                  * back out.
3841                  */
3842                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3843                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3844                             SCTP_ADDR_UNCONFIRMED);
3845                 } else {
3846                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3847                 }
3848
3849                 return (0);
3850         }
3851         addr_inscope = 1;
3852         switch (newaddr->sa_family) {
3853 #ifdef INET
3854         case AF_INET:
3855                 {
3856                         struct sockaddr_in *sin;
3857
3858                         sin = (struct sockaddr_in *)newaddr;
3859                         if (sin->sin_addr.s_addr == 0) {
3860                                 /* Invalid address */
3861                                 return (-1);
3862                         }
3863                         /* zero out the bzero area */
3864                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3865
3866                         /* assure len is set */
3867                         sin->sin_len = sizeof(struct sockaddr_in);
3868                         if (set_scope) {
3869 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3870                                 stcb->ipv4_local_scope = 1;
3871 #else
3872                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3873                                         stcb->asoc.ipv4_local_scope = 1;
3874                                 }
3875 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3876                         } else {
3877                                 /* Validate the address is in scope */
3878                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3879                                     (stcb->asoc.ipv4_local_scope == 0)) {
3880                                         addr_inscope = 0;
3881                                 }
3882                         }
3883                         break;
3884                 }
3885 #endif
3886 #ifdef INET6
3887         case AF_INET6:
3888                 {
3889                         struct sockaddr_in6 *sin6;
3890
3891                         sin6 = (struct sockaddr_in6 *)newaddr;
3892                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3893                                 /* Invalid address */
3894                                 return (-1);
3895                         }
3896                         /* assure len is set */
3897                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3898                         if (set_scope) {
3899                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3900                                         stcb->asoc.loopback_scope = 1;
3901                                         stcb->asoc.local_scope = 0;
3902                                         stcb->asoc.ipv4_local_scope = 1;
3903                                         stcb->asoc.site_scope = 1;
3904                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3905                                         /*
3906                                          * If the new destination is a
3907                                          * LINK_LOCAL we must have common
3908                                          * site scope. Don't set the local
3909                                          * scope since we may not share all
3910                                          * links, only loopback can do this.
3911                                          * Links on the local network would
3912                                          * also be on our private network
3913                                          * for v4 too.
3914                                          */
3915                                         stcb->asoc.ipv4_local_scope = 1;
3916                                         stcb->asoc.site_scope = 1;
3917                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3918                                         /*
3919                                          * If the new destination is
3920                                          * SITE_LOCAL then we must have site
3921                                          * scope in common.
3922                                          */
3923                                         stcb->asoc.site_scope = 1;
3924                                 }
3925                         } else {
3926                                 /* Validate the address is in scope */
3927                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3928                                     (stcb->asoc.loopback_scope == 0)) {
3929                                         addr_inscope = 0;
3930                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3931                                     (stcb->asoc.local_scope == 0)) {
3932                                         addr_inscope = 0;
3933                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3934                                     (stcb->asoc.site_scope == 0)) {
3935                                         addr_inscope = 0;
3936                                 }
3937                         }
3938                         break;
3939                 }
3940 #endif
3941         default:
3942                 /* not supported family type */
3943                 return (-1);
3944         }
3945         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3946         if (net == NULL) {
3947                 return (-1);
3948         }
3949         SCTP_INCR_RADDR_COUNT();
3950         bzero(net, sizeof(struct sctp_nets));
3951         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3952         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3953         switch (newaddr->sa_family) {
3954 #ifdef INET
3955         case AF_INET:
3956                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3957                 break;
3958 #endif
3959 #ifdef INET6
3960         case AF_INET6:
3961                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3962                 break;
3963 #endif
3964         default:
3965                 break;
3966         }
3967         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3968         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3969                 stcb->asoc.loopback_scope = 1;
3970                 stcb->asoc.ipv4_local_scope = 1;
3971                 stcb->asoc.local_scope = 0;
3972                 stcb->asoc.site_scope = 1;
3973                 addr_inscope = 1;
3974         }
3975         net->failure_threshold = stcb->asoc.def_net_failure;
3976         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3977         if (addr_inscope == 0) {
3978                 net->dest_state = (SCTP_ADDR_REACHABLE |
3979                     SCTP_ADDR_OUT_OF_SCOPE);
3980         } else {
3981                 if (from == SCTP_ADDR_IS_CONFIRMED)
3982                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3983                         net->dest_state = SCTP_ADDR_REACHABLE;
3984                 else
3985                         net->dest_state = SCTP_ADDR_REACHABLE |
3986                             SCTP_ADDR_UNCONFIRMED;
3987         }
3988         /*
3989          * We set this to 0, the timer code knows that this means its an
3990          * initial value
3991          */
3992         net->rto_needed = 1;
3993         net->RTO = 0;
3994         net->RTO_measured = 0;
3995         stcb->asoc.numnets++;
3996         *(&net->ref_count) = 1;
3997         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3998         if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) {
3999                 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4000         } else {
4001                 net->port = 0;
4002         }
4003         net->dscp = stcb->asoc.default_dscp;
4004 #ifdef INET6
4005         net->flowlabel = stcb->asoc.default_flowlabel;
4006 #endif
4007         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
4008                 net->dest_state |= SCTP_ADDR_NOHB;
4009         } else {
4010                 net->dest_state &= ~SCTP_ADDR_NOHB;
4011         }
4012         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
4013                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
4014         } else {
4015                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
4016         }
4017         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
4018         /* Init the timer structure */
4019         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
4020         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
4021         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
4022
4023         /* Now generate a route for this guy */
4024 #ifdef INET6
4025         /* KAME hack: embed scopeid */
4026         if (newaddr->sa_family == AF_INET6) {
4027                 struct sockaddr_in6 *sin6;
4028
4029                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4030                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
4031                 sin6->sin6_scope_id = 0;
4032         }
4033 #endif
4034         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
4035
4036         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
4037                 /* Get source address */
4038                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
4039                     stcb,
4040                     (sctp_route_t *) & net->ro,
4041                     net,
4042                     0,
4043                     stcb->asoc.vrf_id);
4044                 /* Now get the interface MTU */
4045                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
4046                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
4047                 }
4048                 if (net->mtu > 0) {
4049                         uint32_t rmtu;
4050
4051                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
4052                         if (rmtu == 0) {
4053                                 /*
4054                                  * Start things off to match mtu of
4055                                  * interface please.
4056                                  */
4057                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
4058                                     net->ro.ro_rt, net->mtu);
4059                         } else {
4060                                 /*
4061                                  * we take the route mtu over the interface,
4062                                  * since the route may be leading out the
4063                                  * loopback, or a different interface.
4064                                  */
4065                                 net->mtu = rmtu;
4066                         }
4067                 }
4068         }
4069         if (net->mtu == 0) {
4070                 switch (newaddr->sa_family) {
4071 #ifdef INET
4072                 case AF_INET:
4073                         net->mtu = SCTP_DEFAULT_MTU;
4074                         break;
4075 #endif
4076 #ifdef INET6
4077                 case AF_INET6:
4078                         net->mtu = 1280;
4079                         break;
4080 #endif
4081                 default:
4082                         break;
4083                 }
4084         }
4085         if (net->port) {
4086                 net->mtu -= (uint32_t) sizeof(struct udphdr);
4087         }
4088         if (from == SCTP_ALLOC_ASOC) {
4089                 stcb->asoc.smallest_mtu = net->mtu;
4090         }
4091         if (stcb->asoc.smallest_mtu > net->mtu) {
4092                 stcb->asoc.smallest_mtu = net->mtu;
4093         }
4094 #ifdef INET6
4095         if (newaddr->sa_family == AF_INET6) {
4096                 struct sockaddr_in6 *sin6;
4097
4098                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4099                 (void)sa6_recoverscope(sin6);
4100         }
4101 #endif
4102
4103         /* JRS - Use the congestion control given in the CC module */
4104         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4105                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4106
4107         /*
4108          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4109          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4110          */
4111         net->find_pseudo_cumack = 1;
4112         net->find_rtx_pseudo_cumack = 1;
4113         net->src_addr_selected = 0;
4114         /* Choose an initial flowid. */
4115         net->flowid = stcb->asoc.my_vtag ^
4116             ntohs(stcb->rport) ^
4117             ntohs(stcb->sctp_ep->sctp_lport);
4118 #ifdef INVARIANTS
4119         net->flowidset = 1;
4120 #endif
4121         if (netp) {
4122                 *netp = net;
4123         }
4124         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4125         if (net->ro.ro_rt == NULL) {
4126                 /* Since we have no route put it at the back */
4127                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4128         } else if (netfirst == NULL) {
4129                 /* We are the first one in the pool. */
4130                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4131         } else if (netfirst->ro.ro_rt == NULL) {
4132                 /*
4133                  * First one has NO route. Place this one ahead of the first
4134                  * one.
4135                  */
4136                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4137         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4138                 /*
4139                  * This one has a different interface than the one at the
4140                  * top of the list. Place it ahead.
4141                  */
4142                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4143         } else {
4144                 /*
4145                  * Ok we have the same interface as the first one. Move
4146                  * forward until we find either a) one with a NULL route...
4147                  * insert ahead of that b) one with a different ifp.. insert
4148                  * after that. c) end of the list.. insert at the tail.
4149                  */
4150                 struct sctp_nets *netlook;
4151
4152                 do {
4153                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4154                         if (netlook == NULL) {
4155                                 /* End of the list */
4156                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4157                                 break;
4158                         } else if (netlook->ro.ro_rt == NULL) {
4159                                 /* next one has NO route */
4160                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4161                                 break;
4162                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4163                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4164                                     net, sctp_next);
4165                                 break;
4166                         }
4167                         /* Shift forward */
4168                         netfirst = netlook;
4169                 } while (netlook != NULL);
4170         }
4171
4172         /* got to have a primary set */
4173         if (stcb->asoc.primary_destination == 0) {
4174                 stcb->asoc.primary_destination = net;
4175         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4176                     (net->ro.ro_rt) &&
4177             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4178                 /* No route to current primary adopt new primary */
4179                 stcb->asoc.primary_destination = net;
4180         }
4181         /* Validate primary is first */
4182         net = TAILQ_FIRST(&stcb->asoc.nets);
4183         if ((net != stcb->asoc.primary_destination) &&
4184             (stcb->asoc.primary_destination)) {
4185                 /*
4186                  * first one on the list is NOT the primary sctp_cmpaddr()
4187                  * is much more efficient if the primary is the first on the
4188                  * list, make it so.
4189                  */
4190                 TAILQ_REMOVE(&stcb->asoc.nets,
4191                     stcb->asoc.primary_destination, sctp_next);
4192                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4193                     stcb->asoc.primary_destination, sctp_next);
4194         }
4195         return (0);
4196 }
4197
4198
4199 static uint32_t
4200 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4201 {
4202         uint32_t id;
4203         struct sctpasochead *head;
4204         struct sctp_tcb *lstcb;
4205
4206         SCTP_INP_WLOCK(inp);
4207 try_again:
4208         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4209                 /* TSNH */
4210                 SCTP_INP_WUNLOCK(inp);
4211                 return (0);
4212         }
4213         /*
4214          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4215          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4216          */
4217         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4218                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4219         }
4220         id = inp->sctp_associd_counter;
4221         inp->sctp_associd_counter++;
4222         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4223         if (lstcb) {
4224                 goto try_again;
4225         }
4226         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4227         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4228         stcb->asoc.in_asocid_hash = 1;
4229         SCTP_INP_WUNLOCK(inp);
4230         return id;
4231 }
4232
4233 /*
4234  * allocate an association and add it to the endpoint. The caller must be
4235  * careful to add all additional addresses once they are know right away or
4236  * else the assoc will be may experience a blackout scenario.
4237  */
4238 struct sctp_tcb *
4239 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4240     int *error, uint32_t override_tag, uint32_t vrf_id,
4241     struct thread *p
4242 )
4243 {
4244         /* note the p argument is only valid in unbound sockets */
4245
4246         struct sctp_tcb *stcb;
4247         struct sctp_association *asoc;
4248         struct sctpasochead *head;
4249         uint16_t rport;
4250         int err;
4251
4252         /*
4253          * Assumption made here: Caller has done a
4254          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4255          * address does not exist already.
4256          */
4257         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4258                 /* Hit max assoc, sorry no more */
4259                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4260                 *error = ENOBUFS;
4261                 return (NULL);
4262         }
4263         if (firstaddr == NULL) {
4264                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4265                 *error = EINVAL;
4266                 return (NULL);
4267         }
4268         SCTP_INP_RLOCK(inp);
4269         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4270             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4271             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4272                 /*
4273                  * If its in the TCP pool, its NOT allowed to create an
4274                  * association. The parent listener needs to call
4275                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4276                  * off, or connected one does this.. its an error.
4277                  */
4278                 SCTP_INP_RUNLOCK(inp);
4279                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4280                 *error = EINVAL;
4281                 return (NULL);
4282         }
4283         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4284             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4285                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4286                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4287                         SCTP_INP_RUNLOCK(inp);
4288                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4289                         *error = EINVAL;
4290                         return (NULL);
4291                 }
4292         }
4293         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4294 #ifdef SCTP_DEBUG
4295         if (firstaddr) {
4296                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4297                 switch (firstaddr->sa_family) {
4298 #ifdef INET
4299                 case AF_INET:
4300                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4301                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4302                         break;
4303 #endif
4304 #ifdef INET6
4305                 case AF_INET6:
4306                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4307                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4308                         break;
4309 #endif
4310                 default:
4311                         break;
4312                 }
4313         } else {
4314                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4315         }
4316 #endif                          /* SCTP_DEBUG */
4317         switch (firstaddr->sa_family) {
4318 #ifdef INET
4319         case AF_INET:
4320                 {
4321                         struct sockaddr_in *sin;
4322
4323                         sin = (struct sockaddr_in *)firstaddr;
4324                         if ((ntohs(sin->sin_port) == 0) ||
4325                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4326                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4327                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4328                                 /* Invalid address */
4329                                 SCTP_INP_RUNLOCK(inp);
4330                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4331                                 *error = EINVAL;
4332                                 return (NULL);
4333                         }
4334                         rport = sin->sin_port;
4335                         break;
4336                 }
4337 #endif
4338 #ifdef INET6
4339         case AF_INET6:
4340                 {
4341                         struct sockaddr_in6 *sin6;
4342
4343                         sin6 = (struct sockaddr_in6 *)firstaddr;
4344                         if ((ntohs(sin6->sin6_port) == 0) ||
4345                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4346                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4347                                 /* Invalid address */
4348                                 SCTP_INP_RUNLOCK(inp);
4349                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4350                                 *error = EINVAL;
4351                                 return (NULL);
4352                         }
4353                         rport = sin6->sin6_port;
4354                         break;
4355                 }
4356 #endif
4357         default:
4358                 /* not supported family type */
4359                 SCTP_INP_RUNLOCK(inp);
4360                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4361                 *error = EINVAL;
4362                 return (NULL);
4363         }
4364         SCTP_INP_RUNLOCK(inp);
4365         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4366                 /*
4367                  * If you have not performed a bind, then we need to do the
4368                  * ephemeral bind for you.
4369                  */
4370                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4371                     (struct sockaddr *)NULL,
4372                     (struct sctp_ifa *)NULL,
4373                     p
4374                     ))) {
4375                         /* bind error, probably perm */
4376                         *error = err;
4377                         return (NULL);
4378                 }
4379         }
4380         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4381         if (stcb == NULL) {
4382                 /* out of memory? */
4383                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4384                 *error = ENOMEM;
4385                 return (NULL);
4386         }
4387         SCTP_INCR_ASOC_COUNT();
4388
4389         bzero(stcb, sizeof(*stcb));
4390         asoc = &stcb->asoc;
4391
4392         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4393         SCTP_TCB_LOCK_INIT(stcb);
4394         SCTP_TCB_SEND_LOCK_INIT(stcb);
4395         stcb->rport = rport;
4396         /* setup back pointer's */
4397         stcb->sctp_ep = inp;
4398         stcb->sctp_socket = inp->sctp_socket;
4399         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4400                 /* failed */
4401                 SCTP_TCB_LOCK_DESTROY(stcb);
4402                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4403                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4404                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4405                 SCTP_DECR_ASOC_COUNT();
4406                 *error = err;
4407                 return (NULL);
4408         }
4409         /* and the port */
4410         SCTP_INP_INFO_WLOCK();
4411         SCTP_INP_WLOCK(inp);
4412         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4413                 /* inpcb freed while alloc going on */
4414                 SCTP_TCB_LOCK_DESTROY(stcb);
4415                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4416                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4417                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4418                 SCTP_INP_WUNLOCK(inp);
4419                 SCTP_INP_INFO_WUNLOCK();
4420                 SCTP_DECR_ASOC_COUNT();
4421                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4422                 *error = EINVAL;
4423                 return (NULL);
4424         }
4425         SCTP_TCB_LOCK(stcb);
4426
4427         /* now that my_vtag is set, add it to the hash */
4428         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4429         /* put it in the bucket in the vtag hash of assoc's for the system */
4430         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4431         SCTP_INP_INFO_WUNLOCK();
4432
4433         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4434                 /* failure.. memory error? */
4435                 if (asoc->strmout) {
4436                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4437                         asoc->strmout = NULL;
4438                 }
4439                 if (asoc->mapping_array) {
4440                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4441                         asoc->mapping_array = NULL;
4442                 }
4443                 if (asoc->nr_mapping_array) {
4444                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4445                         asoc->nr_mapping_array = NULL;
4446                 }
4447                 SCTP_DECR_ASOC_COUNT();
4448                 SCTP_TCB_LOCK_DESTROY(stcb);
4449                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4450                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4451                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4452                 SCTP_INP_WUNLOCK(inp);
4453                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4454                 *error = ENOBUFS;
4455                 return (NULL);
4456         }
4457         /* Init all the timers */
4458         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4459         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4460         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4461         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4462         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4463         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4464         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4465
4466         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4467         /* now file the port under the hash as well */
4468         if (inp->sctp_tcbhash != NULL) {
4469                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4470                     inp->sctp_hashmark)];
4471                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4472         }
4473         SCTP_INP_WUNLOCK(inp);
4474         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
4475         return (stcb);
4476 }
4477
4478
4479 void
4480 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4481 {
4482         struct sctp_association *asoc;
4483
4484         asoc = &stcb->asoc;
4485         asoc->numnets--;
4486         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4487         if (net == asoc->primary_destination) {
4488                 /* Reset primary */
4489                 struct sctp_nets *lnet;
4490
4491                 lnet = TAILQ_FIRST(&asoc->nets);
4492                 /*
4493                  * Mobility adaptation Ideally, if deleted destination is
4494                  * the primary, it becomes a fast retransmission trigger by
4495                  * the subsequent SET PRIMARY. (by micchie)
4496                  */
4497                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4498                     SCTP_MOBILITY_BASE) ||
4499                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4500                     SCTP_MOBILITY_FASTHANDOFF)) {
4501                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4502                         if (asoc->deleted_primary != NULL) {
4503                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4504                                 goto out;
4505                         }
4506                         asoc->deleted_primary = net;
4507                         atomic_add_int(&net->ref_count, 1);
4508                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4509                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4510                         sctp_mobility_feature_on(stcb->sctp_ep,
4511                             SCTP_MOBILITY_PRIM_DELETED);
4512                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4513                             stcb->sctp_ep, stcb, NULL);
4514                 }
4515 out:
4516                 /* Try to find a confirmed primary */
4517                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4518         }
4519         if (net == asoc->last_data_chunk_from) {
4520                 /* Reset primary */
4521                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4522         }
4523         if (net == asoc->last_control_chunk_from) {
4524                 /* Clear net */
4525                 asoc->last_control_chunk_from = NULL;
4526         }
4527         if (net == stcb->asoc.alternate) {
4528                 sctp_free_remote_addr(stcb->asoc.alternate);
4529                 stcb->asoc.alternate = NULL;
4530         }
4531         sctp_free_remote_addr(net);
4532 }
4533
4534 /*
4535  * remove a remote endpoint address from an association, it will fail if the
4536  * address does not exist.
4537  */
4538 int
4539 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4540 {
4541         /*
4542          * Here we need to remove a remote address. This is quite simple, we
4543          * first find it in the list of address for the association
4544          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4545          * on that item. Note we do not allow it to be removed if there are
4546          * no other addresses.
4547          */
4548         struct sctp_association *asoc;
4549         struct sctp_nets *net, *nnet;
4550
4551         asoc = &stcb->asoc;
4552
4553         /* locate the address */
4554         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4555                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4556                         continue;
4557                 }
4558                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4559                     remaddr)) {
4560                         /* we found the guy */
4561                         if (asoc->numnets < 2) {
4562                                 /* Must have at LEAST two remote addresses */
4563                                 return (-1);
4564                         } else {
4565                                 sctp_remove_net(stcb, net);
4566                                 return (0);
4567                         }
4568                 }
4569         }
4570         /* not found. */
4571         return (-2);
4572 }
4573
4574 void
4575 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4576 {
4577         struct sctpvtaghead *chain;
4578         struct sctp_tagblock *twait_block;
4579         int found = 0;
4580         int i;
4581
4582         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4583         if (!LIST_EMPTY(chain)) {
4584                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4585                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4586                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4587                                     (twait_block->vtag_block[i].lport == lport) &&
4588                                     (twait_block->vtag_block[i].rport == rport)) {
4589                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4590                                         twait_block->vtag_block[i].v_tag = 0;
4591                                         twait_block->vtag_block[i].lport = 0;
4592                                         twait_block->vtag_block[i].rport = 0;
4593                                         found = 1;
4594                                         break;
4595                                 }
4596                         }
4597                         if (found)
4598                                 break;
4599                 }
4600         }
4601 }
4602
4603 int
4604 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4605 {
4606         struct sctpvtaghead *chain;
4607         struct sctp_tagblock *twait_block;
4608         int found = 0;
4609         int i;
4610
4611         SCTP_INP_INFO_WLOCK();
4612         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4613         if (!LIST_EMPTY(chain)) {
4614                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4615                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4616                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4617                                     (twait_block->vtag_block[i].lport == lport) &&
4618                                     (twait_block->vtag_block[i].rport == rport)) {
4619                                         found = 1;
4620                                         break;
4621                                 }
4622                         }
4623                         if (found)
4624                                 break;
4625                 }
4626         }
4627         SCTP_INP_INFO_WUNLOCK();
4628         return (found);
4629 }
4630
4631
4632 void
4633 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4634 {
4635         struct sctpvtaghead *chain;
4636         struct sctp_tagblock *twait_block;
4637         struct timeval now;
4638         int set, i;
4639
4640         if (time == 0) {
4641                 /* Its disabled */
4642                 return;
4643         }
4644         (void)SCTP_GETTIME_TIMEVAL(&now);
4645         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4646         set = 0;
4647         if (!LIST_EMPTY(chain)) {
4648                 /* Block(s) present, lets find space, and expire on the fly */
4649                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4650                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4651                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
4652                                     !set) {
4653                                         twait_block->vtag_block[i].tv_sec_at_expire =
4654                                             now.tv_sec + time;
4655                                         twait_block->vtag_block[i].v_tag = tag;
4656                                         twait_block->vtag_block[i].lport = lport;
4657                                         twait_block->vtag_block[i].rport = rport;
4658                                         set = 1;
4659                                 } else if ((twait_block->vtag_block[i].v_tag) &&
4660                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4661                                         /* Audit expires this guy */
4662                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4663                                         twait_block->vtag_block[i].v_tag = 0;
4664                                         twait_block->vtag_block[i].lport = 0;
4665                                         twait_block->vtag_block[i].rport = 0;
4666                                         if (set == 0) {
4667                                                 /* Reuse it for my new tag */
4668                                                 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4669                                                 twait_block->vtag_block[i].v_tag = tag;
4670                                                 twait_block->vtag_block[i].lport = lport;
4671                                                 twait_block->vtag_block[i].rport = rport;
4672                                                 set = 1;
4673                                         }
4674                                 }
4675                         }
4676                         if (set) {
4677                                 /*
4678                                  * We only do up to the block where we can
4679                                  * place our tag for audits
4680                                  */
4681                                 break;
4682                         }
4683                 }
4684         }
4685         /* Need to add a new block to chain */
4686         if (!set) {
4687                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4688                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4689                 if (twait_block == NULL) {
4690 #ifdef INVARIANTS
4691                         panic("Can not alloc tagblock");
4692 #endif
4693                         return;
4694                 }
4695                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4696                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4697                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4698                 twait_block->vtag_block[0].v_tag = tag;
4699                 twait_block->vtag_block[0].lport = lport;
4700                 twait_block->vtag_block[0].rport = rport;
4701         }
4702 }
4703
4704
4705
4706 /*-
4707  * Free the association after un-hashing the remote port. This
4708  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4709  * expect that the input to this function IS a locked TCB.
4710  * It will return 0, if it did NOT destroy the association (instead
4711  * it unlocks it. It will return NON-zero if it either destroyed the
4712  * association OR the association is already destroyed.
4713  */
4714 int
4715 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4716 {
4717         int i;
4718         struct sctp_association *asoc;
4719         struct sctp_nets *net, *nnet;
4720         struct sctp_laddr *laddr, *naddr;
4721         struct sctp_tmit_chunk *chk, *nchk;
4722         struct sctp_asconf_addr *aparam, *naparam;
4723         struct sctp_asconf_ack *aack, *naack;
4724         struct sctp_stream_reset_list *strrst, *nstrrst;
4725         struct sctp_queued_to_read *sq, *nsq;
4726         struct sctp_stream_queue_pending *sp, *nsp;
4727         sctp_sharedkey_t *shared_key, *nshared_key;
4728         struct socket *so;
4729
4730         /* first, lets purge the entry from the hash table. */
4731
4732 #ifdef SCTP_LOG_CLOSING
4733         sctp_log_closing(inp, stcb, 6);
4734 #endif
4735         if (stcb->asoc.state == 0) {
4736 #ifdef SCTP_LOG_CLOSING
4737                 sctp_log_closing(inp, NULL, 7);
4738 #endif
4739                 /* there is no asoc, really TSNH :-0 */
4740                 return (1);
4741         }
4742         if (stcb->asoc.alternate) {
4743                 sctp_free_remote_addr(stcb->asoc.alternate);
4744                 stcb->asoc.alternate = NULL;
4745         }
4746         /* TEMP CODE */
4747         if (stcb->freed_from_where == 0) {
4748                 /* Only record the first place free happened from */
4749                 stcb->freed_from_where = from_location;
4750         }
4751         /* TEMP CODE */
4752
4753         asoc = &stcb->asoc;
4754         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4755             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4756                 /* nothing around */
4757                 so = NULL;
4758         else
4759                 so = inp->sctp_socket;
4760
4761         /*
4762          * We used timer based freeing if a reader or writer is in the way.
4763          * So we first check if we are actually being called from a timer,
4764          * if so we abort early if a reader or writer is still in the way.
4765          */
4766         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4767             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4768                 /*
4769                  * is it the timer driving us? if so are the reader/writers
4770                  * gone?
4771                  */
4772                 if (stcb->asoc.refcnt) {
4773                         /* nope, reader or writer in the way */
4774                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4775                         /* no asoc destroyed */
4776                         SCTP_TCB_UNLOCK(stcb);
4777 #ifdef SCTP_LOG_CLOSING
4778                         sctp_log_closing(inp, stcb, 8);
4779 #endif
4780                         return (0);
4781                 }
4782         }
4783         /* now clean up any other timers */
4784         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4785         asoc->dack_timer.self = NULL;
4786         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4787         /*-
4788          * For stream reset we don't blast this unless
4789          * it is a str-reset timer, it might be the
4790          * free-asoc timer which we DON'T want to
4791          * disturb.
4792          */
4793         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4794                 asoc->strreset_timer.self = NULL;
4795         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4796         asoc->asconf_timer.self = NULL;
4797         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4798         asoc->autoclose_timer.self = NULL;
4799         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4800         asoc->shut_guard_timer.self = NULL;
4801         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4802         asoc->delayed_event_timer.self = NULL;
4803         /* Mobility adaptation */
4804         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4805         asoc->delete_prim_timer.self = NULL;
4806         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4807                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4808                 net->rxt_timer.self = NULL;
4809                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4810                 net->pmtu_timer.self = NULL;
4811                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4812                 net->hb_timer.self = NULL;
4813         }
4814         /* Now the read queue needs to be cleaned up (only once) */
4815         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4816                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4817                 SCTP_INP_READ_LOCK(inp);
4818                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4819                         if (sq->stcb == stcb) {
4820                                 sq->do_not_ref_stcb = 1;
4821                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4822                                 /*
4823                                  * If there is no end, there never will be
4824                                  * now.
4825                                  */
4826                                 if (sq->end_added == 0) {
4827                                         /* Held for PD-API clear that. */
4828                                         sq->pdapi_aborted = 1;
4829                                         sq->held_length = 0;
4830                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4831                                                 /*
4832                                                  * Need to add a PD-API
4833                                                  * aborted indication.
4834                                                  * Setting the control_pdapi
4835                                                  * assures that it will be
4836                                                  * added right after this
4837                                                  * msg.
4838                                                  */
4839                                                 uint32_t strseq;
4840
4841                                                 stcb->asoc.control_pdapi = sq;
4842                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4843                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4844                                                     stcb,
4845                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4846                                                     (void *)&strseq,
4847                                                     SCTP_SO_LOCKED);
4848                                                 stcb->asoc.control_pdapi = NULL;
4849                                         }
4850                                 }
4851                                 /* Add an end to wake them */
4852                                 sq->end_added = 1;
4853                         }
4854                 }
4855                 SCTP_INP_READ_UNLOCK(inp);
4856                 if (stcb->block_entry) {
4857                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4858                         stcb->block_entry->error = ECONNRESET;
4859                         stcb->block_entry = NULL;
4860                 }
4861         }
4862         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4863                 /*
4864                  * Someone holds a reference OR the socket is unaccepted
4865                  * yet.
4866                  */
4867                 if ((stcb->asoc.refcnt) ||
4868                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4869                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4870                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4871                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4872                 }
4873                 SCTP_TCB_UNLOCK(stcb);
4874                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4875                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4876                         /* nothing around */
4877                         so = NULL;
4878                 if (so) {
4879                         /* Wake any reader/writers */
4880                         sctp_sorwakeup(inp, so);
4881                         sctp_sowwakeup(inp, so);
4882                 }
4883 #ifdef SCTP_LOG_CLOSING
4884                 sctp_log_closing(inp, stcb, 9);
4885 #endif
4886                 /* no asoc destroyed */
4887                 return (0);
4888         }
4889 #ifdef SCTP_LOG_CLOSING
4890         sctp_log_closing(inp, stcb, 10);
4891 #endif
4892         /*
4893          * When I reach here, no others want to kill the assoc yet.. and I
4894          * own the lock. Now its possible an abort comes in when I do the
4895          * lock exchange below to grab all the locks to do the final take
4896          * out. to prevent this we increment the count, which will start a
4897          * timer and blow out above thus assuring us that we hold exclusive
4898          * killing of the asoc. Note that after getting back the TCB lock we
4899          * will go ahead and increment the counter back up and stop any
4900          * timer a passing stranger may have started :-S
4901          */
4902         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4903                 atomic_add_int(&stcb->asoc.refcnt, 1);
4904
4905                 SCTP_TCB_UNLOCK(stcb);
4906                 SCTP_INP_INFO_WLOCK();
4907                 SCTP_INP_WLOCK(inp);
4908                 SCTP_TCB_LOCK(stcb);
4909         }
4910         /* Double check the GONE flag */
4911         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4912             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4913                 /* nothing around */
4914                 so = NULL;
4915
4916         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4917             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4918                 /*
4919                  * For TCP type we need special handling when we are
4920                  * connected. We also include the peel'ed off ones to.
4921                  */
4922                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4923                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4924                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4925                         if (so) {
4926                                 SOCK_LOCK(so);
4927                                 if (so->so_rcv.sb_cc == 0) {
4928                                         so->so_state &= ~(SS_ISCONNECTING |
4929                                             SS_ISDISCONNECTING |
4930                                             SS_ISCONFIRMING |
4931                                             SS_ISCONNECTED);
4932                                 }
4933                                 socantrcvmore_locked(so);
4934                                 sctp_sowwakeup(inp, so);
4935                                 sctp_sorwakeup(inp, so);
4936                                 SCTP_SOWAKEUP(so);
4937                         }
4938                 }
4939         }
4940         /*
4941          * Make it invalid too, that way if its about to run it will abort
4942          * and return.
4943          */
4944         /* re-increment the lock */
4945         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4946                 atomic_add_int(&stcb->asoc.refcnt, -1);
4947         }
4948         if (stcb->asoc.refcnt) {
4949                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4950                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4951                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4952                         SCTP_INP_INFO_WUNLOCK();
4953                         SCTP_INP_WUNLOCK(inp);
4954                 }
4955                 SCTP_TCB_UNLOCK(stcb);
4956                 return (0);
4957         }
4958         asoc->state = 0;
4959         if (inp->sctp_tcbhash) {
4960                 LIST_REMOVE(stcb, sctp_tcbhash);
4961         }
4962         if (stcb->asoc.in_asocid_hash) {
4963                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4964         }
4965         /* Now lets remove it from the list of ALL associations in the EP */
4966         LIST_REMOVE(stcb, sctp_tcblist);
4967         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4968                 SCTP_INP_INCR_REF(inp);
4969                 SCTP_INP_WUNLOCK(inp);
4970         }
4971         /* pull from vtag hash */
4972         LIST_REMOVE(stcb, sctp_asocs);
4973         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4974             inp->sctp_lport, stcb->rport);
4975
4976         /*
4977          * Now restop the timers to be sure this is paranoia at is finest!
4978          */
4979         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4980         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4981         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4982         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4983         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4984         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4985         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4986         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4987                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4988                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4989                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4990         }
4991
4992         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4993         /*
4994          * The chunk lists and such SHOULD be empty but we check them just
4995          * in case.
4996          */
4997         /* anything on the wheel needs to be removed */
4998         for (i = 0; i < asoc->streamoutcnt; i++) {
4999                 struct sctp_stream_out *outs;
5000
5001                 outs = &asoc->strmout[i];
5002                 /* now clean up any chunks here */
5003                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
5004                         TAILQ_REMOVE(&outs->outqueue, sp, next);
5005                         if (sp->data) {
5006                                 if (so) {
5007                                         /* Still an open socket - report */
5008                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
5009                                             SCTP_NOTIFY_DATAGRAM_UNSENT,
5010                                             (void *)sp, SCTP_SO_LOCKED);
5011                                 }
5012                                 if (sp->data) {
5013                                         sctp_m_freem(sp->data);
5014                                         sp->data = NULL;
5015                                         sp->tail_mbuf = NULL;
5016                                 }
5017                         }
5018                         if (sp->net) {
5019                                 sctp_free_remote_addr(sp->net);
5020                                 sp->net = NULL;
5021                         }
5022                         sctp_free_spbufspace(stcb, asoc, sp);
5023                         if (sp->holds_key_ref)
5024                                 sctp_auth_key_release(stcb, sp->auth_keyid, SCTP_SO_LOCKED);
5025                         /* Free the zone stuff  */
5026                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp);
5027                         SCTP_DECR_STRMOQ_COUNT();
5028                         /* sa_ignore FREED_MEMORY */
5029                 }
5030         }
5031         /* sa_ignore FREED_MEMORY */
5032         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
5033                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
5034                 SCTP_FREE(strrst, SCTP_M_STRESET);
5035         }
5036         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
5037                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
5038                 if (sq->data) {
5039                         sctp_m_freem(sq->data);
5040                         sq->data = NULL;
5041                 }
5042                 sctp_free_remote_addr(sq->whoFrom);
5043                 sq->whoFrom = NULL;
5044                 sq->stcb = NULL;
5045                 /* Free the ctl entry */
5046                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
5047                 SCTP_DECR_READQ_COUNT();
5048                 /* sa_ignore FREED_MEMORY */
5049         }
5050         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
5051                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
5052                 if (chk->data) {
5053                         sctp_m_freem(chk->data);
5054                         chk->data = NULL;
5055                 }
5056                 if (chk->holds_key_ref)
5057                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5058                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5059                 SCTP_DECR_CHK_COUNT();
5060                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
5061                 asoc->free_chunk_cnt--;
5062                 /* sa_ignore FREED_MEMORY */
5063         }
5064         /* pending send queue SHOULD be empty */
5065         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5066                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5067                 if (chk->data) {
5068                         if (so) {
5069                                 /* Still a socket? */
5070                                 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb,
5071                                     SCTP_NOTIFY_DATAGRAM_UNSENT, chk, SCTP_SO_LOCKED);
5072                         }
5073                         if (chk->data) {
5074                                 sctp_m_freem(chk->data);
5075                                 chk->data = NULL;
5076                         }
5077                 }
5078                 if (chk->holds_key_ref)
5079                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5080                 if (chk->whoTo) {
5081                         sctp_free_remote_addr(chk->whoTo);
5082                         chk->whoTo = NULL;
5083                 }
5084                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5085                 SCTP_DECR_CHK_COUNT();
5086                 /* sa_ignore FREED_MEMORY */
5087         }
5088         /* sent queue SHOULD be empty */
5089         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5090                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5091                 if (chk->data) {
5092                         if (so) {
5093                                 /* Still a socket? */
5094                                 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb,
5095                                     SCTP_NOTIFY_DATAGRAM_SENT, chk, SCTP_SO_LOCKED);
5096                         }
5097                         if (chk->data) {
5098                                 sctp_m_freem(chk->data);
5099                                 chk->data = NULL;
5100                         }
5101                 }
5102                 if (chk->holds_key_ref)
5103                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5104                 sctp_free_remote_addr(chk->whoTo);
5105                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5106                 SCTP_DECR_CHK_COUNT();
5107                 /* sa_ignore FREED_MEMORY */
5108         }
5109         /* control queue MAY not be empty */
5110         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5111                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5112                 if (chk->data) {
5113                         sctp_m_freem(chk->data);
5114                         chk->data = NULL;
5115                 }
5116                 if (chk->holds_key_ref)
5117                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5118                 sctp_free_remote_addr(chk->whoTo);
5119                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5120                 SCTP_DECR_CHK_COUNT();
5121                 /* sa_ignore FREED_MEMORY */
5122         }
5123         /* ASCONF queue MAY not be empty */
5124         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5125                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5126                 if (chk->data) {
5127                         sctp_m_freem(chk->data);
5128                         chk->data = NULL;
5129                 }
5130                 if (chk->holds_key_ref)
5131                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5132                 sctp_free_remote_addr(chk->whoTo);
5133                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5134                 SCTP_DECR_CHK_COUNT();
5135                 /* sa_ignore FREED_MEMORY */
5136         }
5137         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5138                 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5139                 if (chk->data) {
5140                         sctp_m_freem(chk->data);
5141                         chk->data = NULL;
5142                 }
5143                 if (chk->holds_key_ref)
5144                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5145                 sctp_free_remote_addr(chk->whoTo);
5146                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5147                 SCTP_DECR_CHK_COUNT();
5148                 /* sa_ignore FREED_MEMORY */
5149         }
5150
5151         if (asoc->mapping_array) {
5152                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5153                 asoc->mapping_array = NULL;
5154         }
5155         if (asoc->nr_mapping_array) {
5156                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5157                 asoc->nr_mapping_array = NULL;
5158         }
5159         /* the stream outs */
5160         if (asoc->strmout) {
5161                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5162                 asoc->strmout = NULL;
5163         }
5164         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5165         if (asoc->strmin) {
5166                 struct sctp_queued_to_read *ctl, *nctl;
5167
5168                 for (i = 0; i < asoc->streamincnt; i++) {
5169                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5170                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5171                                 sctp_free_remote_addr(ctl->whoFrom);
5172                                 if (ctl->data) {
5173                                         sctp_m_freem(ctl->data);
5174                                         ctl->data = NULL;
5175                                 }
5176                                 /*
5177                                  * We don't free the address here since all
5178                                  * the net's were freed above.
5179                                  */
5180                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5181                                 SCTP_DECR_READQ_COUNT();
5182                         }
5183                 }
5184                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5185                 asoc->strmin = NULL;
5186         }
5187         asoc->streamincnt = 0;
5188         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5189 #ifdef INVARIANTS
5190                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5191                         panic("no net's left alloc'ed, or list points to itself");
5192                 }
5193 #endif
5194                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5195                 sctp_free_remote_addr(net);
5196         }
5197         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5198                 /* sa_ignore FREED_MEMORY */
5199                 sctp_remove_laddr(laddr);
5200         }
5201
5202         /* pending asconf (address) parameters */
5203         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5204                 /* sa_ignore FREED_MEMORY */
5205                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5206                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5207         }
5208         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5209                 /* sa_ignore FREED_MEMORY */
5210                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5211                 if (aack->data != NULL) {
5212                         sctp_m_freem(aack->data);
5213                 }
5214                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5215         }
5216         /* clean up auth stuff */
5217         if (asoc->local_hmacs)
5218                 sctp_free_hmaclist(asoc->local_hmacs);
5219         if (asoc->peer_hmacs)
5220                 sctp_free_hmaclist(asoc->peer_hmacs);
5221
5222         if (asoc->local_auth_chunks)
5223                 sctp_free_chunklist(asoc->local_auth_chunks);
5224         if (asoc->peer_auth_chunks)
5225                 sctp_free_chunklist(asoc->peer_auth_chunks);
5226
5227         sctp_free_authinfo(&asoc->authinfo);
5228
5229         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5230                 LIST_REMOVE(shared_key, next);
5231                 sctp_free_sharedkey(shared_key);
5232                 /* sa_ignore FREED_MEMORY */
5233         }
5234
5235         /* Insert new items here :> */
5236
5237         /* Get rid of LOCK */
5238         SCTP_TCB_LOCK_DESTROY(stcb);
5239         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5240         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5241                 SCTP_INP_INFO_WUNLOCK();
5242                 SCTP_INP_RLOCK(inp);
5243         }
5244 #ifdef SCTP_TRACK_FREED_ASOCS
5245         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5246                 /* now clean up the tasoc itself */
5247                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5248                 SCTP_DECR_ASOC_COUNT();
5249         } else {
5250                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5251         }
5252 #else
5253         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5254         SCTP_DECR_ASOC_COUNT();
5255 #endif
5256         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5257                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5258                         /*
5259                          * If its NOT the inp_free calling us AND sctp_close
5260                          * as been called, we call back...
5261                          */
5262                         SCTP_INP_RUNLOCK(inp);
5263                         /*
5264                          * This will start the kill timer (if we are the
5265                          * last one) since we hold an increment yet. But
5266                          * this is the only safe way to do this since
5267                          * otherwise if the socket closes at the same time
5268                          * we are here we might collide in the cleanup.
5269                          */
5270                         sctp_inpcb_free(inp,
5271                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5272                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5273                         SCTP_INP_DECR_REF(inp);
5274                         goto out_of;
5275                 } else {
5276                         /* The socket is still open. */
5277                         SCTP_INP_DECR_REF(inp);
5278                 }
5279         }
5280         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5281                 SCTP_INP_RUNLOCK(inp);
5282         }
5283 out_of:
5284         /* destroyed the asoc */
5285 #ifdef SCTP_LOG_CLOSING
5286         sctp_log_closing(inp, NULL, 11);
5287 #endif
5288         return (1);
5289 }
5290
5291
5292
5293 /*
5294  * determine if a destination is "reachable" based upon the addresses bound
5295  * to the current endpoint (e.g. only v4 or v6 currently bound)
5296  */
5297 /*
5298  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5299  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5300  * types bound as its endpoint
5301  */
5302 int
5303 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5304 {
5305         struct sctp_inpcb *inp;
5306         int answer;
5307
5308         /*
5309          * No locks here, the TCB, in all cases is already locked and an
5310          * assoc is up. There is either a INP lock by the caller applied (in
5311          * asconf case when deleting an address) or NOT in the HB case,
5312          * however if HB then the INP increment is up and the INP will not
5313          * be removed (on top of the fact that we have a TCB lock). So we
5314          * only want to read the sctp_flags, which is either bound-all or
5315          * not.. no protection needed since once an assoc is up you can't be
5316          * changing your binding.
5317          */
5318         inp = stcb->sctp_ep;
5319         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5320                 /* if bound all, destination is not restricted */
5321                 /*
5322                  * RRS: Question during lock work: Is this correct? If you
5323                  * are bound-all you still might need to obey the V4--V6
5324                  * flags??? IMO this bound-all stuff needs to be removed!
5325                  */
5326                 return (1);
5327         }
5328         /* NOTE: all "scope" checks are done when local addresses are added */
5329         switch (destaddr->sa_family) {
5330         case AF_INET6:
5331                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5332                 break;
5333         case AF_INET:
5334                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5335                 break;
5336         default:
5337                 /* invalid family, so it's unreachable */
5338                 answer = 0;
5339                 break;
5340         }
5341         return (answer);
5342 }
5343
5344 /*
5345  * update the inp_vflags on an endpoint
5346  */
5347 static void
5348 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5349 {
5350         struct sctp_laddr *laddr;
5351
5352         /* first clear the flag */
5353         inp->ip_inp.inp.inp_vflag = 0;
5354         /* set the flag based on addresses on the ep list */
5355         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5356                 if (laddr->ifa == NULL) {
5357                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5358                             __FUNCTION__);
5359                         continue;
5360                 }
5361                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5362                         continue;
5363                 }
5364                 switch (laddr->ifa->address.sa.sa_family) {
5365 #ifdef INET6
5366                 case AF_INET6:
5367                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5368                         break;
5369 #endif
5370 #ifdef INET
5371                 case AF_INET:
5372                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5373                         break;
5374 #endif
5375                 default:
5376                         break;
5377                 }
5378         }
5379 }
5380
5381 /*
5382  * Add the address to the endpoint local address list There is nothing to be
5383  * done if we are bound to all addresses
5384  */
5385 void
5386 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5387 {
5388         struct sctp_laddr *laddr;
5389         int fnd, error = 0;
5390
5391         fnd = 0;
5392
5393         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5394                 /* You are already bound to all. You have it already */
5395                 return;
5396         }
5397 #ifdef INET6
5398         if (ifa->address.sa.sa_family == AF_INET6) {
5399                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5400                         /* Can't bind a non-useable addr. */
5401                         return;
5402                 }
5403         }
5404 #endif
5405         /* first, is it already present? */
5406         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5407                 if (laddr->ifa == ifa) {
5408                         fnd = 1;
5409                         break;
5410                 }
5411         }
5412
5413         if (fnd == 0) {
5414                 /* Not in the ep list */
5415                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5416                 if (error != 0)
5417                         return;
5418                 inp->laddr_count++;
5419                 /* update inp_vflag flags */
5420                 switch (ifa->address.sa.sa_family) {
5421 #ifdef INET6
5422                 case AF_INET6:
5423                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5424                         break;
5425 #endif
5426 #ifdef INET6
5427                 case AF_INET:
5428                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5429                         break;
5430 #endif
5431                 default:
5432                         break;
5433                 }
5434         }
5435         return;
5436 }
5437
5438
5439 /*
5440  * select a new (hopefully reachable) destination net (should only be used
5441  * when we deleted an ep addr that is the only usable source address to reach
5442  * the destination net)
5443  */
5444 static void
5445 sctp_select_primary_destination(struct sctp_tcb *stcb)
5446 {
5447         struct sctp_nets *net;
5448
5449         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5450                 /* for now, we'll just pick the first reachable one we find */
5451                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5452                         continue;
5453                 if (sctp_destination_is_reachable(stcb,
5454                     (struct sockaddr *)&net->ro._l_addr)) {
5455                         /* found a reachable destination */
5456                         stcb->asoc.primary_destination = net;
5457                 }
5458         }
5459         /* I can't there from here! ...we're gonna die shortly... */
5460 }
5461
5462
5463 /*
5464  * Delete the address from the endpoint local address list There is nothing
5465  * to be done if we are bound to all addresses
5466  */
5467 void
5468 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5469 {
5470         struct sctp_laddr *laddr;
5471         int fnd;
5472
5473         fnd = 0;
5474         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5475                 /* You are already bound to all. You have it already */
5476                 return;
5477         }
5478         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5479                 if (laddr->ifa == ifa) {
5480                         fnd = 1;
5481                         break;
5482                 }
5483         }
5484         if (fnd && (inp->laddr_count < 2)) {
5485                 /* can't delete unless there are at LEAST 2 addresses */
5486                 return;
5487         }
5488         if (fnd) {
5489                 /*
5490                  * clean up any use of this address go through our
5491                  * associations and clear any last_used_address that match
5492                  * this one for each assoc, see if a new primary_destination
5493                  * is needed
5494                  */
5495                 struct sctp_tcb *stcb;
5496
5497                 /* clean up "next_addr_touse" */
5498                 if (inp->next_addr_touse == laddr)
5499                         /* delete this address */
5500                         inp->next_addr_touse = NULL;
5501
5502                 /* clean up "last_used_address" */
5503                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5504                         struct sctp_nets *net;
5505
5506                         SCTP_TCB_LOCK(stcb);
5507                         if (stcb->asoc.last_used_address == laddr)
5508                                 /* delete this address */
5509                                 stcb->asoc.last_used_address = NULL;
5510                         /*
5511                          * Now spin through all the nets and purge any ref
5512                          * to laddr
5513                          */
5514                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5515                                 if (net->ro._s_addr &&
5516                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5517                                         /* Yep, purge src address selected */
5518                                         sctp_rtentry_t *rt;
5519
5520                                         /* delete this address if cached */
5521                                         rt = net->ro.ro_rt;
5522                                         if (rt != NULL) {
5523                                                 RTFREE(rt);
5524                                                 net->ro.ro_rt = NULL;
5525                                         }
5526                                         sctp_free_ifa(net->ro._s_addr);
5527                                         net->ro._s_addr = NULL;
5528                                         net->src_addr_selected = 0;
5529                                 }
5530                         }
5531                         SCTP_TCB_UNLOCK(stcb);
5532                 }               /* for each tcb */
5533                 /* remove it from the ep list */
5534                 sctp_remove_laddr(laddr);
5535                 inp->laddr_count--;
5536                 /* update inp_vflag flags */
5537                 sctp_update_ep_vflag(inp);
5538         }
5539         return;
5540 }
5541
5542 /*
5543  * Add the address to the TCB local address restricted list.
5544  * This is a "pending" address list (eg. addresses waiting for an
5545  * ASCONF-ACK response) and cannot be used as a valid source address.
5546  */
5547 void
5548 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5549 {
5550         struct sctp_inpcb *inp;
5551         struct sctp_laddr *laddr;
5552         struct sctpladdr *list;
5553
5554         /*
5555          * Assumes TCB is locked.. and possibly the INP. May need to
5556          * confirm/fix that if we need it and is not the case.
5557          */
5558         list = &stcb->asoc.sctp_restricted_addrs;
5559
5560         inp = stcb->sctp_ep;
5561 #ifdef INET6
5562         if (ifa->address.sa.sa_family == AF_INET6) {
5563                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5564                         /* Can't bind a non-existent addr. */
5565                         return;
5566                 }
5567         }
5568 #endif
5569         /* does the address already exist? */
5570         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5571                 if (laddr->ifa == ifa) {
5572                         return;
5573                 }
5574         }
5575
5576         /* add to the list */
5577         (void)sctp_insert_laddr(list, ifa, 0);
5578         return;
5579 }
5580
5581 /*
5582  * insert an laddr entry with the given ifa for the desired list
5583  */
5584 int
5585 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5586 {
5587         struct sctp_laddr *laddr;
5588
5589         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5590         if (laddr == NULL) {
5591                 /* out of memory? */
5592                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5593                 return (EINVAL);
5594         }
5595         SCTP_INCR_LADDR_COUNT();
5596         bzero(laddr, sizeof(*laddr));
5597         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5598         laddr->ifa = ifa;
5599         laddr->action = act;
5600         atomic_add_int(&ifa->refcount, 1);
5601         /* insert it */
5602         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5603
5604         return (0);
5605 }
5606
5607 /*
5608  * Remove an laddr entry from the local address list (on an assoc)
5609  */
5610 void
5611 sctp_remove_laddr(struct sctp_laddr *laddr)
5612 {
5613
5614         /* remove from the list */
5615         LIST_REMOVE(laddr, sctp_nxt_addr);
5616         sctp_free_ifa(laddr->ifa);
5617         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5618         SCTP_DECR_LADDR_COUNT();
5619 }
5620
5621 /*
5622  * Remove a local address from the TCB local address restricted list
5623  */
5624 void
5625 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5626 {
5627         struct sctp_inpcb *inp;
5628         struct sctp_laddr *laddr;
5629
5630         /*
5631          * This is called by asconf work. It is assumed that a) The TCB is
5632          * locked and b) The INP is locked. This is true in as much as I can
5633          * trace through the entry asconf code where I did these locks.
5634          * Again, the ASCONF code is a bit different in that it does lock
5635          * the INP during its work often times. This must be since we don't
5636          * want other proc's looking up things while what they are looking
5637          * up is changing :-D
5638          */
5639
5640         inp = stcb->sctp_ep;
5641         /* if subset bound and don't allow ASCONF's, can't delete last */
5642         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5643             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5644                 if (stcb->sctp_ep->laddr_count < 2) {
5645                         /* can't delete last address */
5646                         return;
5647                 }
5648         }
5649         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5650                 /* remove the address if it exists */
5651                 if (laddr->ifa == NULL)
5652                         continue;
5653                 if (laddr->ifa == ifa) {
5654                         sctp_remove_laddr(laddr);
5655                         return;
5656                 }
5657         }
5658
5659         /* address not found! */
5660         return;
5661 }
5662
5663 /*
5664  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5665  */
5666 /* sysctl */
5667 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5668 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5669
5670
5671
5672 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5673 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5674 int *sctp_cpuarry = NULL;
5675 void
5676 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5677 {
5678         /* Queue a packet to a processor for the specified core */
5679         struct sctp_mcore_queue *qent;
5680         struct sctp_mcore_ctrl *wkq;
5681         int need_wake = 0;
5682
5683         if (sctp_mcore_workers == NULL) {
5684                 /* Something went way bad during setup */
5685                 sctp_input_with_port(m, off, 0);
5686                 return;
5687         }
5688         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5689             (sizeof(struct sctp_mcore_queue)),
5690             SCTP_M_MCORE);
5691         if (qent == NULL) {
5692                 /* This is trouble  */
5693                 sctp_input_with_port(m, off, 0);
5694                 return;
5695         }
5696         qent->vn = curvnet;
5697         qent->m = m;
5698         qent->off = off;
5699         qent->v6 = 0;
5700         wkq = &sctp_mcore_workers[cpu_to_use];
5701         SCTP_MCORE_QLOCK(wkq);
5702
5703         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5704         if (wkq->running == 0) {
5705                 need_wake = 1;
5706         }
5707         SCTP_MCORE_QUNLOCK(wkq);
5708         if (need_wake) {
5709                 wakeup(&wkq->running);
5710         }
5711 }
5712
5713 static void
5714 sctp_mcore_thread(void *arg)
5715 {
5716
5717         struct sctp_mcore_ctrl *wkq;
5718         struct sctp_mcore_queue *qent;
5719
5720         wkq = (struct sctp_mcore_ctrl *)arg;
5721         struct mbuf *m;
5722         int off, v6;
5723
5724         /* Wait for first tickle */
5725         SCTP_MCORE_LOCK(wkq);
5726         wkq->running = 0;
5727         msleep(&wkq->running,
5728             &wkq->core_mtx,
5729             0, "wait for pkt", 0);
5730         SCTP_MCORE_UNLOCK(wkq);
5731
5732         /* Bind to our cpu */
5733         thread_lock(curthread);
5734         sched_bind(curthread, wkq->cpuid);
5735         thread_unlock(curthread);
5736
5737         /* Now lets start working */
5738         SCTP_MCORE_LOCK(wkq);
5739         /* Now grab lock and go */
5740         while (1) {
5741                 SCTP_MCORE_QLOCK(wkq);
5742 skip_sleep:
5743                 wkq->running = 1;
5744                 qent = TAILQ_FIRST(&wkq->que);
5745                 if (qent) {
5746                         TAILQ_REMOVE(&wkq->que, qent, next);
5747                         SCTP_MCORE_QUNLOCK(wkq);
5748                         CURVNET_SET(qent->vn);
5749                         m = qent->m;
5750                         off = qent->off;
5751                         v6 = qent->v6;
5752                         SCTP_FREE(qent, SCTP_M_MCORE);
5753                         if (v6 == 0) {
5754                                 sctp_input_with_port(m, off, 0);
5755                         } else {
5756                                 printf("V6 not yet supported\n");
5757                                 sctp_m_freem(m);
5758                         }
5759                         CURVNET_RESTORE();
5760                         SCTP_MCORE_QLOCK(wkq);
5761                 }
5762                 wkq->running = 0;
5763                 if (!TAILQ_EMPTY(&wkq->que)) {
5764                         goto skip_sleep;
5765                 }
5766                 SCTP_MCORE_QUNLOCK(wkq);
5767                 msleep(&wkq->running,
5768                     &wkq->core_mtx,
5769                     0, "wait for pkt", 0);
5770         };
5771 }
5772
5773 static void
5774 sctp_startup_mcore_threads(void)
5775 {
5776         int i, cpu;
5777
5778         if (mp_ncpus == 1)
5779                 return;
5780
5781         if (sctp_mcore_workers != NULL) {
5782                 /*
5783                  * Already been here in some previous vnet?
5784                  */
5785                 return;
5786         }
5787         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5788             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5789             SCTP_M_MCORE);
5790         if (sctp_mcore_workers == NULL) {
5791                 /* TSNH I hope */
5792                 return;
5793         }
5794         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5795             sizeof(struct sctp_mcore_ctrl)));
5796         /* Init the structures */
5797         for (i = 0; i <= mp_maxid; i++) {
5798                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5799                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5800                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5801                 sctp_mcore_workers[i].cpuid = i;
5802         }
5803         if (sctp_cpuarry == NULL) {
5804                 SCTP_MALLOC(sctp_cpuarry, int *,
5805                     (mp_ncpus * sizeof(int)),
5806                     SCTP_M_MCORE);
5807                 i = 0;
5808                 CPU_FOREACH(cpu) {
5809                         sctp_cpuarry[i] = cpu;
5810                         i++;
5811                 }
5812         }
5813         /* Now start them all */
5814         CPU_FOREACH(cpu) {
5815                 (void)kproc_create(sctp_mcore_thread,
5816                     (void *)&sctp_mcore_workers[cpu],
5817                     &sctp_mcore_workers[cpu].thread_proc,
5818                     RFPROC,
5819                     SCTP_KTHREAD_PAGES,
5820                     SCTP_MCORE_NAME);
5821
5822         }
5823 }
5824
5825 #endif
5826
5827 void
5828 sctp_pcb_init()
5829 {
5830         /*
5831          * SCTP initialization for the PCB structures should be called by
5832          * the sctp_init() funciton.
5833          */
5834         int i;
5835         struct timeval tv;
5836
5837         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5838                 /* error I was called twice */
5839                 return;
5840         }
5841         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5842
5843 #if defined(SCTP_LOCAL_TRACE_BUF)
5844         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5845 #endif
5846 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5847         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5848             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5849             SCTP_M_MCORE);
5850 #endif
5851         (void)SCTP_GETTIME_TIMEVAL(&tv);
5852 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5853         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5854         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5855         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5856 #else
5857         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5858         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5859         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5860 #endif
5861         /* init the empty list of (All) Endpoints */
5862         LIST_INIT(&SCTP_BASE_INFO(listhead));
5863
5864
5865         /* init the hash table of endpoints */
5866         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5867         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5868         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5869         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5870             &SCTP_BASE_INFO(hashasocmark));
5871         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5872             &SCTP_BASE_INFO(hashmark));
5873         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5874             &SCTP_BASE_INFO(hashtcpmark));
5875         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5876
5877
5878         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5879             &SCTP_BASE_INFO(hashvrfmark));
5880
5881         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5882             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5883         /* init the zones */
5884         /*
5885          * FIX ME: Should check for NULL returns, but if it does fail we are
5886          * doomed to panic anyways... add later maybe.
5887          */
5888         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5889             sizeof(struct sctp_inpcb), maxsockets);
5890
5891         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5892             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5893
5894         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5895             sizeof(struct sctp_laddr),
5896             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5897
5898         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5899             sizeof(struct sctp_nets),
5900             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5901
5902         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5903             sizeof(struct sctp_tmit_chunk),
5904             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5905
5906         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5907             sizeof(struct sctp_queued_to_read),
5908             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5909
5910         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5911             sizeof(struct sctp_stream_queue_pending),
5912             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5913
5914         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5915             sizeof(struct sctp_asconf),
5916             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5917
5918         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5919             sizeof(struct sctp_asconf_ack),
5920             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5921
5922
5923         /* Master Lock INIT for info structure */
5924         SCTP_INP_INFO_LOCK_INIT();
5925         SCTP_STATLOG_INIT_LOCK();
5926
5927         SCTP_IPI_COUNT_INIT();
5928         SCTP_IPI_ADDR_INIT();
5929 #ifdef SCTP_PACKET_LOGGING
5930         SCTP_IP_PKTLOG_INIT();
5931 #endif
5932         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5933
5934         SCTP_WQ_ADDR_INIT();
5935         /* not sure if we need all the counts */
5936         SCTP_BASE_INFO(ipi_count_ep) = 0;
5937         /* assoc/tcb zone info */
5938         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5939         /* local addrlist zone info */
5940         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5941         /* remote addrlist zone info */
5942         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5943         /* chunk info */
5944         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5945
5946         /* socket queue zone info */
5947         SCTP_BASE_INFO(ipi_count_readq) = 0;
5948
5949         /* stream out queue cont */
5950         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5951
5952         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5953         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5954
5955         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5956
5957         /* Init the TIMEWAIT list */
5958         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5959                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5960         }
5961
5962         sctp_startup_iterator();
5963
5964 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5965         sctp_startup_mcore_threads();
5966 #endif
5967
5968         /*
5969          * INIT the default VRF which for BSD is the only one, other O/S's
5970          * may have more. But initially they must start with one and then
5971          * add the VRF's as addresses are added.
5972          */
5973         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5974 }
5975
5976 /*
5977  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5978  */
5979 void
5980 sctp_pcb_finish(void)
5981 {
5982         struct sctp_vrflist *vrf_bucket;
5983         struct sctp_vrf *vrf, *nvrf;
5984         struct sctp_ifn *ifn, *nifn;
5985         struct sctp_ifa *ifa, *nifa;
5986         struct sctpvtaghead *chain;
5987         struct sctp_tagblock *twait_block, *prev_twait_block;
5988         struct sctp_laddr *wi, *nwi;
5989         int i;
5990
5991         /*
5992          * Free BSD the it thread never exits but we do clean up. The only
5993          * way freebsd reaches here if we have VRF's but we still add the
5994          * ifdef to make it compile on old versions.
5995          */
5996         {
5997                 struct sctp_iterator *it, *nit;
5998
5999                 SCTP_IPI_ITERATOR_WQ_LOCK();
6000                 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
6001                         if (it->vn != curvnet) {
6002                                 continue;
6003                         }
6004                         TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
6005                         if (it->function_atend != NULL) {
6006                                 (*it->function_atend) (it->pointer, it->val);
6007                         }
6008                         SCTP_FREE(it, SCTP_M_ITER);
6009                 }
6010                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
6011                 SCTP_ITERATOR_LOCK();
6012                 if ((sctp_it_ctl.cur_it) &&
6013                     (sctp_it_ctl.cur_it->vn == curvnet)) {
6014                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
6015                 }
6016                 SCTP_ITERATOR_UNLOCK();
6017         }
6018
6019         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
6020         SCTP_WQ_ADDR_LOCK();
6021         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
6022                 LIST_REMOVE(wi, sctp_nxt_addr);
6023                 SCTP_DECR_LADDR_COUNT();
6024                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
6025         }
6026         SCTP_WQ_ADDR_UNLOCK();
6027
6028         /*
6029          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
6030          * destroyed first).
6031          */
6032         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
6033         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
6034                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
6035                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
6036                                 /* free the ifa */
6037                                 LIST_REMOVE(ifa, next_bucket);
6038                                 LIST_REMOVE(ifa, next_ifa);
6039                                 SCTP_FREE(ifa, SCTP_M_IFA);
6040                         }
6041                         /* free the ifn */
6042                         LIST_REMOVE(ifn, next_bucket);
6043                         LIST_REMOVE(ifn, next_ifn);
6044                         SCTP_FREE(ifn, SCTP_M_IFN);
6045                 }
6046                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
6047                 /* free the vrf */
6048                 LIST_REMOVE(vrf, next_vrf);
6049                 SCTP_FREE(vrf, SCTP_M_VRF);
6050         }
6051         /* free the vrf hashes */
6052         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
6053         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
6054
6055         /*
6056          * free the TIMEWAIT list elements malloc'd in the function
6057          * sctp_add_vtag_to_timewait()...
6058          */
6059         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6060                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
6061                 if (!LIST_EMPTY(chain)) {
6062                         prev_twait_block = NULL;
6063                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6064                                 if (prev_twait_block) {
6065                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6066                                 }
6067                                 prev_twait_block = twait_block;
6068                         }
6069                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6070                 }
6071         }
6072
6073         /* free the locks and mutexes */
6074 #ifdef SCTP_PACKET_LOGGING
6075         SCTP_IP_PKTLOG_DESTROY();
6076 #endif
6077         SCTP_IPI_ADDR_DESTROY();
6078         SCTP_STATLOG_DESTROY();
6079         SCTP_INP_INFO_LOCK_DESTROY();
6080
6081         SCTP_WQ_ADDR_DESTROY();
6082
6083         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6084         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6085         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6086         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6087         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6088         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6089         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6090         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6091         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6092         /* Get rid of other stuff to */
6093         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6094                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6095         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6096                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6097         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6098                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6099 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6100         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6101 #endif
6102 }
6103
6104
6105 int
6106 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6107     int iphlen, int offset, int limit, struct sctphdr *sh,
6108     struct sockaddr *altsa)
6109 {
6110         /*
6111          * grub through the INIT pulling addresses and loading them to the
6112          * nets structure in the asoc. The from address in the mbuf should
6113          * also be loaded (if it is not already). This routine can be called
6114          * with either INIT or INIT-ACK's as long as the m points to the IP
6115          * packet and the offset points to the beginning of the parameters.
6116          */
6117         struct sctp_inpcb *inp, *l_inp;
6118         struct sctp_nets *net, *nnet, *net_tmp;
6119         struct ip *iph;
6120         struct sctp_paramhdr *phdr, parm_buf;
6121         struct sctp_tcb *stcb_tmp;
6122         uint16_t ptype, plen;
6123         struct sockaddr *sa;
6124         struct sockaddr_storage dest_store;
6125         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
6126         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6127         struct sctp_auth_random *p_random = NULL;
6128         uint16_t random_len = 0;
6129         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6130         struct sctp_auth_hmac_algo *hmacs = NULL;
6131         uint16_t hmacs_len = 0;
6132         uint8_t saw_asconf = 0;
6133         uint8_t saw_asconf_ack = 0;
6134         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6135         struct sctp_auth_chunk_list *chunks = NULL;
6136         uint16_t num_chunks = 0;
6137         sctp_key_t *new_key;
6138         uint32_t keylen;
6139         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6140         uint8_t ecn_allowed;
6141
6142 #ifdef INET
6143         struct sockaddr_in sin;
6144
6145 #endif
6146 #ifdef INET6
6147         struct sockaddr_in6 sin6;
6148
6149 #endif
6150
6151         /* First get the destination address setup too. */
6152 #ifdef INET
6153         memset(&sin, 0, sizeof(sin));
6154         sin.sin_family = AF_INET;
6155         sin.sin_len = sizeof(sin);
6156         sin.sin_port = stcb->rport;
6157 #endif
6158 #ifdef INET6
6159         memset(&sin6, 0, sizeof(sin6));
6160         sin6.sin6_family = AF_INET6;
6161         sin6.sin6_len = sizeof(struct sockaddr_in6);
6162         sin6.sin6_port = stcb->rport;
6163 #endif
6164         iph = mtod(m, struct ip *);
6165         switch (iph->ip_v) {
6166 #ifdef INET
6167         case IPVERSION:
6168                 {
6169                         /* its IPv4 */
6170                         struct sockaddr_in *sin_2;
6171
6172                         sin_2 = (struct sockaddr_in *)(local_sa);
6173                         memset(sin_2, 0, sizeof(sin));
6174                         sin_2->sin_family = AF_INET;
6175                         sin_2->sin_len = sizeof(sin);
6176                         sin_2->sin_port = sh->dest_port;
6177                         sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
6178                         if (altsa) {
6179                                 /*
6180                                  * For cookies we use the src address NOT
6181                                  * from the packet but from the original
6182                                  * INIT.
6183                                  */
6184                                 sa = altsa;
6185                         } else {
6186                                 sin.sin_addr = iph->ip_src;
6187                                 sa = (struct sockaddr *)&sin;
6188                         }
6189                         break;
6190                 }
6191 #endif
6192 #ifdef INET6
6193         case IPV6_VERSION >> 4:
6194                 {
6195                         /* its IPv6 */
6196                         struct ip6_hdr *ip6;
6197                         struct sockaddr_in6 *sin6_2;
6198
6199                         ip6 = mtod(m, struct ip6_hdr *);
6200                         sin6_2 = (struct sockaddr_in6 *)(local_sa);
6201                         memset(sin6_2, 0, sizeof(sin6));
6202                         sin6_2->sin6_family = AF_INET6;
6203                         sin6_2->sin6_len = sizeof(struct sockaddr_in6);
6204                         sin6_2->sin6_port = sh->dest_port;
6205                         sin6_2->sin6_addr = ip6->ip6_dst;
6206                         if (altsa) {
6207                                 /*
6208                                  * For cookies we use the src address NOT
6209                                  * from the packet but from the original
6210                                  * INIT.
6211                                  */
6212                                 sa = altsa;
6213                         } else {
6214                                 sin6.sin6_addr = ip6->ip6_src;
6215                                 sa = (struct sockaddr *)&sin6;
6216                         }
6217                         break;
6218                 }
6219 #endif
6220         default:
6221                 return (-1);
6222                 break;
6223         }
6224         /* Turn off ECN until we get through all params */
6225         ecn_allowed = 0;
6226         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6227                 /* mark all addresses that we have currently on the list */
6228                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6229         }
6230         /* does the source address already exist? if so skip it */
6231         l_inp = inp = stcb->sctp_ep;
6232
6233         atomic_add_int(&stcb->asoc.refcnt, 1);
6234         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
6235         atomic_add_int(&stcb->asoc.refcnt, -1);
6236
6237         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6238                 /* we must add the source address */
6239                 /* no scope set here since we have a tcb already. */
6240                 switch (sa->sa_family) {
6241 #ifdef INET
6242                 case AF_INET:
6243                         if (stcb->asoc.ipv4_addr_legal) {
6244                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6245                                         return (-1);
6246                                 }
6247                         }
6248                         break;
6249 #endif
6250 #ifdef INET6
6251                 case AF_INET6:
6252                         if (stcb->asoc.ipv6_addr_legal) {
6253                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6254                                         return (-2);
6255                                 }
6256                         }
6257                         break;
6258 #endif
6259                 default:
6260                         break;
6261                 }
6262         } else {
6263                 if (net_tmp != NULL && stcb_tmp == stcb) {
6264                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6265                 } else if (stcb_tmp != stcb) {
6266                         /* It belongs to another association? */
6267                         if (stcb_tmp)
6268                                 SCTP_TCB_UNLOCK(stcb_tmp);
6269                         return (-3);
6270                 }
6271         }
6272         if (stcb->asoc.state == 0) {
6273                 /* the assoc was freed? */
6274                 return (-4);
6275         }
6276         /*
6277          * peer must explicitly turn this on. This may have been initialized
6278          * to be "on" in order to allow local addr changes while INIT's are
6279          * in flight.
6280          */
6281         stcb->asoc.peer_supports_asconf = 0;
6282         /* now we must go through each of the params. */
6283         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6284         while (phdr) {
6285                 ptype = ntohs(phdr->param_type);
6286                 plen = ntohs(phdr->param_length);
6287                 /*
6288                  * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
6289                  * (int)plen);
6290                  */
6291                 if (offset + plen > limit) {
6292                         break;
6293                 }
6294                 if (plen == 0) {
6295                         break;
6296                 }
6297 #ifdef INET
6298                 if (ptype == SCTP_IPV4_ADDRESS) {
6299                         if (stcb->asoc.ipv4_addr_legal) {
6300                                 struct sctp_ipv4addr_param *p4, p4_buf;
6301
6302                                 /* ok get the v4 address and check/add */
6303                                 phdr = sctp_get_next_param(m, offset,
6304                                     (struct sctp_paramhdr *)&p4_buf,
6305                                     sizeof(p4_buf));
6306                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6307                                     phdr == NULL) {
6308                                         return (-5);
6309                                 }
6310                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6311                                 sin.sin_addr.s_addr = p4->addr;
6312                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6313                                         /* Skip multi-cast addresses */
6314                                         goto next_param;
6315                                 }
6316                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6317                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6318                                         goto next_param;
6319                                 }
6320                                 sa = (struct sockaddr *)&sin;
6321                                 inp = stcb->sctp_ep;
6322                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6323                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6324                                     local_sa, stcb);
6325                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6326
6327                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6328                                     inp == NULL) {
6329                                         /* we must add the source address */
6330                                         /*
6331                                          * no scope set since we have a tcb
6332                                          * already
6333                                          */
6334
6335                                         /*
6336                                          * we must validate the state again
6337                                          * here
6338                                          */
6339                         add_it_now:
6340                                         if (stcb->asoc.state == 0) {
6341                                                 /* the assoc was freed? */
6342                                                 return (-7);
6343                                         }
6344                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6345                                                 return (-8);
6346                                         }
6347                                 } else if (stcb_tmp == stcb) {
6348                                         if (stcb->asoc.state == 0) {
6349                                                 /* the assoc was freed? */
6350                                                 return (-10);
6351                                         }
6352                                         if (net != NULL) {
6353                                                 /* clear flag */
6354                                                 net->dest_state &=
6355                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6356                                         }
6357                                 } else {
6358                                         /*
6359                                          * strange, address is in another
6360                                          * assoc? straighten out locks.
6361                                          */
6362                                         if (stcb_tmp) {
6363                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6364                                                         /*
6365                                                          * in setup state we
6366                                                          * abort this guy
6367                                                          */
6368                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6369                                                             stcb_tmp, 1, NULL, 0);
6370                                                         goto add_it_now;
6371                                                 }
6372                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6373                                         }
6374                                         if (stcb->asoc.state == 0) {
6375                                                 /* the assoc was freed? */
6376                                                 return (-12);
6377                                         }
6378                                         return (-13);
6379                                 }
6380                         }
6381                 } else
6382 #endif
6383 #ifdef INET6
6384                 if (ptype == SCTP_IPV6_ADDRESS) {
6385                         if (stcb->asoc.ipv6_addr_legal) {
6386                                 /* ok get the v6 address and check/add */
6387                                 struct sctp_ipv6addr_param *p6, p6_buf;
6388
6389                                 phdr = sctp_get_next_param(m, offset,
6390                                     (struct sctp_paramhdr *)&p6_buf,
6391                                     sizeof(p6_buf));
6392                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6393                                     phdr == NULL) {
6394                                         return (-14);
6395                                 }
6396                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6397                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6398                                     sizeof(p6->addr));
6399                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6400                                         /* Skip multi-cast addresses */
6401                                         goto next_param;
6402                                 }
6403                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6404                                         /*
6405                                          * Link local make no sense without
6406                                          * scope
6407                                          */
6408                                         goto next_param;
6409                                 }
6410                                 sa = (struct sockaddr *)&sin6;
6411                                 inp = stcb->sctp_ep;
6412                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6413                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6414                                     local_sa, stcb);
6415                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6416                                 if (stcb_tmp == NULL &&
6417                                     (inp == stcb->sctp_ep || inp == NULL)) {
6418                                         /*
6419                                          * we must validate the state again
6420                                          * here
6421                                          */
6422                         add_it_now6:
6423                                         if (stcb->asoc.state == 0) {
6424                                                 /* the assoc was freed? */
6425                                                 return (-16);
6426                                         }
6427                                         /*
6428                                          * we must add the address, no scope
6429                                          * set
6430                                          */
6431                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6432                                                 return (-17);
6433                                         }
6434                                 } else if (stcb_tmp == stcb) {
6435                                         /*
6436                                          * we must validate the state again
6437                                          * here
6438                                          */
6439                                         if (stcb->asoc.state == 0) {
6440                                                 /* the assoc was freed? */
6441                                                 return (-19);
6442                                         }
6443                                         if (net != NULL) {
6444                                                 /* clear flag */
6445                                                 net->dest_state &=
6446                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6447                                         }
6448                                 } else {
6449                                         /*
6450                                          * strange, address is in another
6451                                          * assoc? straighten out locks.
6452                                          */
6453                                         if (stcb_tmp)
6454                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6455                                                         /*
6456                                                          * in setup state we
6457                                                          * abort this guy
6458                                                          */
6459                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6460                                                             stcb_tmp, 1, NULL, 0);
6461                                                         goto add_it_now6;
6462                                                 }
6463                                         SCTP_TCB_UNLOCK(stcb_tmp);
6464
6465                                         if (stcb->asoc.state == 0) {
6466                                                 /* the assoc was freed? */
6467                                                 return (-21);
6468                                         }
6469                                         return (-22);
6470                                 }
6471                         }
6472                 } else
6473 #endif
6474                 if (ptype == SCTP_ECN_CAPABLE) {
6475                         ecn_allowed = 1;
6476                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6477                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6478                                 struct sctp_adaptation_layer_indication ai,
6479                                                                 *aip;
6480
6481                                 phdr = sctp_get_next_param(m, offset,
6482                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6483                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6484                                 if (aip) {
6485                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6486                                         stcb->asoc.adaptation_needed = 1;
6487                                 }
6488                         }
6489                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6490                         struct sctp_asconf_addr_param lstore, *fee;
6491                         int lptype;
6492                         struct sockaddr *lsa = NULL;
6493
6494 #ifdef INET
6495                         struct sctp_asconf_addrv4_param *fii;
6496
6497 #endif
6498
6499                         stcb->asoc.peer_supports_asconf = 1;
6500                         if (plen > sizeof(lstore)) {
6501                                 return (-23);
6502                         }
6503                         phdr = sctp_get_next_param(m, offset,
6504                             (struct sctp_paramhdr *)&lstore,
6505                             min(plen, sizeof(lstore)));
6506                         if (phdr == NULL) {
6507                                 return (-24);
6508                         }
6509                         fee = (struct sctp_asconf_addr_param *)phdr;
6510                         lptype = ntohs(fee->addrp.ph.param_type);
6511                         switch (lptype) {
6512 #ifdef INET
6513                         case SCTP_IPV4_ADDRESS:
6514                                 if (plen !=
6515                                     sizeof(struct sctp_asconf_addrv4_param)) {
6516                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6517                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6518                                             plen);
6519                                 } else {
6520                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6521                                         sin.sin_addr.s_addr = fii->addrp.addr;
6522                                         lsa = (struct sockaddr *)&sin;
6523                                 }
6524                                 break;
6525 #endif
6526 #ifdef INET6
6527                         case SCTP_IPV6_ADDRESS:
6528                                 if (plen !=
6529                                     sizeof(struct sctp_asconf_addr_param)) {
6530                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6531                                             (int)sizeof(struct sctp_asconf_addr_param),
6532                                             plen);
6533                                 } else {
6534                                         memcpy(sin6.sin6_addr.s6_addr,
6535                                             fee->addrp.addr,
6536                                             sizeof(fee->addrp.addr));
6537                                         lsa = (struct sockaddr *)&sin6;
6538                                 }
6539                                 break;
6540 #endif
6541                         default:
6542                                 break;
6543                         }
6544                         if (lsa) {
6545                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6546                         }
6547                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6548                         stcb->asoc.peer_supports_nat = 1;
6549                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6550                         /* Peer supports pr-sctp */
6551                         stcb->asoc.peer_supports_prsctp = 1;
6552                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6553                         /* A supported extension chunk */
6554                         struct sctp_supported_chunk_types_param *pr_supported;
6555                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6556                         int num_ent, i;
6557
6558                         phdr = sctp_get_next_param(m, offset,
6559                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6560                         if (phdr == NULL) {
6561                                 return (-25);
6562                         }
6563                         stcb->asoc.peer_supports_asconf = 0;
6564                         stcb->asoc.peer_supports_prsctp = 0;
6565                         stcb->asoc.peer_supports_pktdrop = 0;
6566                         stcb->asoc.peer_supports_strreset = 0;
6567                         stcb->asoc.peer_supports_nr_sack = 0;
6568                         stcb->asoc.peer_supports_auth = 0;
6569                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6570                         num_ent = plen - sizeof(struct sctp_paramhdr);
6571                         for (i = 0; i < num_ent; i++) {
6572                                 switch (pr_supported->chunk_types[i]) {
6573                                 case SCTP_ASCONF:
6574                                 case SCTP_ASCONF_ACK:
6575                                         stcb->asoc.peer_supports_asconf = 1;
6576                                         break;
6577                                 case SCTP_FORWARD_CUM_TSN:
6578                                         stcb->asoc.peer_supports_prsctp = 1;
6579                                         break;
6580                                 case SCTP_PACKET_DROPPED:
6581                                         stcb->asoc.peer_supports_pktdrop = 1;
6582                                         break;
6583                                 case SCTP_NR_SELECTIVE_ACK:
6584                                         stcb->asoc.peer_supports_nr_sack = 1;
6585                                         break;
6586                                 case SCTP_STREAM_RESET:
6587                                         stcb->asoc.peer_supports_strreset = 1;
6588                                         break;
6589                                 case SCTP_AUTHENTICATION:
6590                                         stcb->asoc.peer_supports_auth = 1;
6591                                         break;
6592                                 default:
6593                                         /* one I have not learned yet */
6594                                         break;
6595
6596                                 }
6597                         }
6598                 } else if (ptype == SCTP_RANDOM) {
6599                         if (plen > sizeof(random_store))
6600                                 break;
6601                         if (got_random) {
6602                                 /* already processed a RANDOM */
6603                                 goto next_param;
6604                         }
6605                         phdr = sctp_get_next_param(m, offset,
6606                             (struct sctp_paramhdr *)random_store,
6607                             min(sizeof(random_store), plen));
6608                         if (phdr == NULL)
6609                                 return (-26);
6610                         p_random = (struct sctp_auth_random *)phdr;
6611                         random_len = plen - sizeof(*p_random);
6612                         /* enforce the random length */
6613                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6614                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6615                                 return (-27);
6616                         }
6617                         got_random = 1;
6618                 } else if (ptype == SCTP_HMAC_LIST) {
6619                         int num_hmacs;
6620                         int i;
6621
6622                         if (plen > sizeof(hmacs_store))
6623                                 break;
6624                         if (got_hmacs) {
6625                                 /* already processed a HMAC list */
6626                                 goto next_param;
6627                         }
6628                         phdr = sctp_get_next_param(m, offset,
6629                             (struct sctp_paramhdr *)hmacs_store,
6630                             min(plen, sizeof(hmacs_store)));
6631                         if (phdr == NULL)
6632                                 return (-28);
6633                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6634                         hmacs_len = plen - sizeof(*hmacs);
6635                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6636                         /* validate the hmac list */
6637                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6638                                 return (-29);
6639                         }
6640                         if (stcb->asoc.peer_hmacs != NULL)
6641                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6642                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6643                         if (stcb->asoc.peer_hmacs != NULL) {
6644                                 for (i = 0; i < num_hmacs; i++) {
6645                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6646                                             ntohs(hmacs->hmac_ids[i]));
6647                                 }
6648                         }
6649                         got_hmacs = 1;
6650                 } else if (ptype == SCTP_CHUNK_LIST) {
6651                         int i;
6652
6653                         if (plen > sizeof(chunks_store))
6654                                 break;
6655                         if (got_chklist) {
6656                                 /* already processed a Chunks list */
6657                                 goto next_param;
6658                         }
6659                         phdr = sctp_get_next_param(m, offset,
6660                             (struct sctp_paramhdr *)chunks_store,
6661                             min(plen, sizeof(chunks_store)));
6662                         if (phdr == NULL)
6663                                 return (-30);
6664                         chunks = (struct sctp_auth_chunk_list *)phdr;
6665                         num_chunks = plen - sizeof(*chunks);
6666                         if (stcb->asoc.peer_auth_chunks != NULL)
6667                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6668                         else
6669                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6670                         for (i = 0; i < num_chunks; i++) {
6671                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6672                                     stcb->asoc.peer_auth_chunks);
6673                                 /* record asconf/asconf-ack if listed */
6674                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6675                                         saw_asconf = 1;
6676                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6677                                         saw_asconf_ack = 1;
6678
6679                         }
6680                         got_chklist = 1;
6681                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6682                             (ptype == SCTP_STATE_COOKIE) ||
6683                             (ptype == SCTP_UNRECOG_PARAM) ||
6684                             (ptype == SCTP_COOKIE_PRESERVE) ||
6685                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6686                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6687                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6688                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6689                     (ptype == SCTP_SUCCESS_REPORT)) {
6690                          /* don't care */ ;
6691                 } else {
6692                         if ((ptype & 0x8000) == 0x0000) {
6693                                 /*
6694                                  * must stop processing the rest of the
6695                                  * param's. Any report bits were handled
6696                                  * with the call to
6697                                  * sctp_arethere_unrecognized_parameters()
6698                                  * when the INIT or INIT-ACK was first seen.
6699                                  */
6700                                 break;
6701                         }
6702                 }
6703
6704 next_param:
6705                 offset += SCTP_SIZE32(plen);
6706                 if (offset >= limit) {
6707                         break;
6708                 }
6709                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6710                     sizeof(parm_buf));
6711         }
6712         /* Now check to see if we need to purge any addresses */
6713         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6714                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6715                     SCTP_ADDR_NOT_IN_ASSOC) {
6716                         /* This address has been removed from the asoc */
6717                         /* remove and free it */
6718                         stcb->asoc.numnets--;
6719                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6720                         sctp_free_remote_addr(net);
6721                         if (net == stcb->asoc.primary_destination) {
6722                                 stcb->asoc.primary_destination = NULL;
6723                                 sctp_select_primary_destination(stcb);
6724                         }
6725                 }
6726         }
6727         if (ecn_allowed == 0) {
6728                 stcb->asoc.ecn_allowed = 0;
6729         }
6730         /* validate authentication required parameters */
6731         if (got_random && got_hmacs) {
6732                 stcb->asoc.peer_supports_auth = 1;
6733         } else {
6734                 stcb->asoc.peer_supports_auth = 0;
6735         }
6736         if (!stcb->asoc.peer_supports_auth && got_chklist) {
6737                 /* peer does not support auth but sent a chunks list? */
6738                 return (-31);
6739         }
6740         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6741             !stcb->asoc.peer_supports_auth) {
6742                 /* peer supports asconf but not auth? */
6743                 return (-32);
6744         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6745             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6746                 return (-33);
6747         }
6748         /* concatenate the full random key */
6749         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6750         if (chunks != NULL) {
6751                 keylen += sizeof(*chunks) + num_chunks;
6752         }
6753         new_key = sctp_alloc_key(keylen);
6754         if (new_key != NULL) {
6755                 /* copy in the RANDOM */
6756                 if (p_random != NULL) {
6757                         keylen = sizeof(*p_random) + random_len;
6758                         bcopy(p_random, new_key->key, keylen);
6759                 }
6760                 /* append in the AUTH chunks */
6761                 if (chunks != NULL) {
6762                         bcopy(chunks, new_key->key + keylen,
6763                             sizeof(*chunks) + num_chunks);
6764                         keylen += sizeof(*chunks) + num_chunks;
6765                 }
6766                 /* append in the HMACs */
6767                 if (hmacs != NULL) {
6768                         bcopy(hmacs, new_key->key + keylen,
6769                             sizeof(*hmacs) + hmacs_len);
6770                 }
6771         } else {
6772                 /* failed to get memory for the key */
6773                 return (-34);
6774         }
6775         if (stcb->asoc.authinfo.peer_random != NULL)
6776                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6777         stcb->asoc.authinfo.peer_random = new_key;
6778         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6779         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6780
6781         return (0);
6782 }
6783
6784 int
6785 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6786     struct sctp_nets *net)
6787 {
6788         /* make sure the requested primary address exists in the assoc */
6789         if (net == NULL && sa)
6790                 net = sctp_findnet(stcb, sa);
6791
6792         if (net == NULL) {
6793                 /* didn't find the requested primary address! */
6794                 return (-1);
6795         } else {
6796                 /* set the primary address */
6797                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6798                         /* Must be confirmed, so queue to set */
6799                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6800                         return (0);
6801                 }
6802                 stcb->asoc.primary_destination = net;
6803                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6804                         sctp_free_remote_addr(stcb->asoc.alternate);
6805                         stcb->asoc.alternate = NULL;
6806                 }
6807                 net = TAILQ_FIRST(&stcb->asoc.nets);
6808                 if (net != stcb->asoc.primary_destination) {
6809                         /*
6810                          * first one on the list is NOT the primary
6811                          * sctp_cmpaddr() is much more efficient if the
6812                          * primary is the first on the list, make it so.
6813                          */
6814                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6815                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6816                 }
6817                 return (0);
6818         }
6819 }
6820
6821 int
6822 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait)
6823 {
6824         /*
6825          * This function serves two purposes. It will see if a TAG can be
6826          * re-used and return 1 for yes it is ok and 0 for don't use that
6827          * tag. A secondary function it will do is purge out old tags that
6828          * can be removed.
6829          */
6830         struct sctpvtaghead *chain;
6831         struct sctp_tagblock *twait_block;
6832         struct sctpasochead *head;
6833         struct sctp_tcb *stcb;
6834         int i;
6835
6836         SCTP_INP_INFO_RLOCK();
6837         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6838             SCTP_BASE_INFO(hashasocmark))];
6839         if (head == NULL) {
6840                 /* invalid vtag */
6841                 goto skip_vtag_check;
6842         }
6843         LIST_FOREACH(stcb, head, sctp_asocs) {
6844                 /*
6845                  * We choose not to lock anything here. TCB's can't be
6846                  * removed since we have the read lock, so they can't be
6847                  * freed on us, same thing for the INP. I may be wrong with
6848                  * this assumption, but we will go with it for now :-)
6849                  */
6850                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6851                         continue;
6852                 }
6853                 if (stcb->asoc.my_vtag == tag) {
6854                         /* candidate */
6855                         if (stcb->rport != rport) {
6856                                 continue;
6857                         }
6858                         if (stcb->sctp_ep->sctp_lport != lport) {
6859                                 continue;
6860                         }
6861                         /* Its a used tag set */
6862                         SCTP_INP_INFO_RUNLOCK();
6863                         return (0);
6864                 }
6865         }
6866 skip_vtag_check:
6867
6868         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6869         /* Now what about timed wait ? */
6870         if (!LIST_EMPTY(chain)) {
6871                 /*
6872                  * Block(s) are present, lets see if we have this tag in the
6873                  * list
6874                  */
6875                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6876                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6877                                 if (twait_block->vtag_block[i].v_tag == 0) {
6878                                         /* not used */
6879                                         continue;
6880                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6881                                     now->tv_sec) {
6882                                         /* Audit expires this guy */
6883                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
6884                                         twait_block->vtag_block[i].v_tag = 0;
6885                                         twait_block->vtag_block[i].lport = 0;
6886                                         twait_block->vtag_block[i].rport = 0;
6887                                 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6888                                             (twait_block->vtag_block[i].lport == lport) &&
6889                                     (twait_block->vtag_block[i].rport == rport)) {
6890                                         /* Bad tag, sorry :< */
6891                                         SCTP_INP_INFO_RUNLOCK();
6892                                         return (0);
6893                                 }
6894                         }
6895                 }
6896         }
6897         SCTP_INP_INFO_RUNLOCK();
6898         return (1);
6899 }
6900
6901
6902 static sctp_assoc_t reneged_asoc_ids[256];
6903 static uint8_t reneged_at = 0;
6904
6905
6906 static void
6907 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
6908 {
6909         /*
6910          * We must hunt this association for MBUF's past the cumack (i.e.
6911          * out of order data that we can renege on).
6912          */
6913         struct sctp_association *asoc;
6914         struct sctp_tmit_chunk *chk, *nchk;
6915         uint32_t cumulative_tsn_p1;
6916         struct sctp_queued_to_read *ctl, *nctl;
6917         int cnt, strmat;
6918         uint32_t gap, i;
6919         int fnd = 0;
6920
6921         /* We look for anything larger than the cum-ack + 1 */
6922
6923         asoc = &stcb->asoc;
6924         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6925                 /* none we can reneg on. */
6926                 return;
6927         }
6928         SCTP_STAT_INCR(sctps_protocol_drains_done);
6929         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6930         cnt = 0;
6931         /* First look in the re-assembly queue */
6932         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6933                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6934                         /* Yep it is above cum-ack */
6935                         cnt++;
6936                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6937                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6938                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6939                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6940                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6941                         if (chk->data) {
6942                                 sctp_m_freem(chk->data);
6943                                 chk->data = NULL;
6944                         }
6945                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6946                 }
6947         }
6948         /* Ok that was fun, now we will drain all the inbound streams? */
6949         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6950                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6951                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6952                                 /* Yep it is above cum-ack */
6953                                 cnt++;
6954                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6955                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6956                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6957                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6958                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6959                                 if (ctl->data) {
6960                                         sctp_m_freem(ctl->data);
6961                                         ctl->data = NULL;
6962                                 }
6963                                 sctp_free_remote_addr(ctl->whoFrom);
6964                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6965                                 SCTP_DECR_READQ_COUNT();
6966                         }
6967                 }
6968         }
6969         if (cnt) {
6970                 /* We must back down to see what the new highest is */
6971                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6972                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6973                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6974                                 asoc->highest_tsn_inside_map = i;
6975                                 fnd = 1;
6976                                 break;
6977                         }
6978                 }
6979                 if (!fnd) {
6980                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6981                 }
6982                 /*
6983                  * Question, should we go through the delivery queue? The
6984                  * only reason things are on here is the app not reading OR
6985                  * a p-d-api up. An attacker COULD send enough in to
6986                  * initiate the PD-API and then send a bunch of stuff to
6987                  * other streams... these would wind up on the delivery
6988                  * queue.. and then we would not get to them. But in order
6989                  * to do this I then have to back-track and un-deliver
6990                  * sequence numbers in streams.. el-yucko. I think for now
6991                  * we will NOT look at the delivery queue and leave it to be
6992                  * something to consider later. An alternative would be to
6993                  * abort the P-D-API with a notification and then deliver
6994                  * the data.... Or another method might be to keep track of
6995                  * how many times the situation occurs and if we see a
6996                  * possible attack underway just abort the association.
6997                  */
6998 #ifdef SCTP_DEBUG
6999                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
7000 #endif
7001                 /*
7002                  * Now do we need to find a new
7003                  * asoc->highest_tsn_inside_map?
7004                  */
7005                 asoc->last_revoke_count = cnt;
7006                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
7007                 /* sa_ignore NO_NULL_CHK */
7008                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
7009                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
7010                 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
7011                 reneged_at++;
7012         }
7013         /*
7014          * Another issue, in un-setting the TSN's in the mapping array we
7015          * DID NOT adjust the highest_tsn marker.  This will cause one of
7016          * two things to occur. It may cause us to do extra work in checking
7017          * for our mapping array movement. More importantly it may cause us
7018          * to SACK every datagram. This may not be a bad thing though since
7019          * we will recover once we get our cum-ack above and all this stuff
7020          * we dumped recovered.
7021          */
7022 }
7023
7024 void
7025 sctp_drain()
7026 {
7027         /*
7028          * We must walk the PCB lists for ALL associations here. The system
7029          * is LOW on MBUF's and needs help. This is where reneging will
7030          * occur. We really hope this does NOT happen!
7031          */
7032         VNET_ITERATOR_DECL(vnet_iter);
7033         VNET_LIST_RLOCK_NOSLEEP();
7034         VNET_FOREACH(vnet_iter) {
7035                 CURVNET_SET(vnet_iter);
7036                 struct sctp_inpcb *inp;
7037                 struct sctp_tcb *stcb;
7038
7039                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
7040                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7041 #ifdef VIMAGE
7042                         continue;
7043 #else
7044                         return;
7045 #endif
7046                 }
7047                 SCTP_INP_INFO_RLOCK();
7048                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7049                         /* For each endpoint */
7050                         SCTP_INP_RLOCK(inp);
7051                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7052                                 /* For each association */
7053                                 SCTP_TCB_LOCK(stcb);
7054                                 sctp_drain_mbufs(inp, stcb);
7055                                 SCTP_TCB_UNLOCK(stcb);
7056                         }
7057                         SCTP_INP_RUNLOCK(inp);
7058                 }
7059                 SCTP_INP_INFO_RUNLOCK();
7060                 CURVNET_RESTORE();
7061         }
7062         VNET_LIST_RUNLOCK_NOSLEEP();
7063 }
7064
7065 /*
7066  * start a new iterator
7067  * iterates through all endpoints and associations based on the pcb_state
7068  * flags and asoc_state.  "af" (mandatory) is executed for all matching
7069  * assocs and "ef" (optional) is executed when the iterator completes.
7070  * "inpf" (optional) is executed for each new endpoint as it is being
7071  * iterated through. inpe (optional) is called when the inp completes
7072  * its way through all the stcbs.
7073  */
7074 int
7075 sctp_initiate_iterator(inp_func inpf,
7076     asoc_func af,
7077     inp_func inpe,
7078     uint32_t pcb_state,
7079     uint32_t pcb_features,
7080     uint32_t asoc_state,
7081     void *argp,
7082     uint32_t argi,
7083     end_func ef,
7084     struct sctp_inpcb *s_inp,
7085     uint8_t chunk_output_off)
7086 {
7087         struct sctp_iterator *it = NULL;
7088
7089         if (af == NULL) {
7090                 return (-1);
7091         }
7092         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7093             SCTP_M_ITER);
7094         if (it == NULL) {
7095                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7096                 return (ENOMEM);
7097         }
7098         memset(it, 0, sizeof(*it));
7099         it->function_assoc = af;
7100         it->function_inp = inpf;
7101         if (inpf)
7102                 it->done_current_ep = 0;
7103         else
7104                 it->done_current_ep = 1;
7105         it->function_atend = ef;
7106         it->pointer = argp;
7107         it->val = argi;
7108         it->pcb_flags = pcb_state;
7109         it->pcb_features = pcb_features;
7110         it->asoc_state = asoc_state;
7111         it->function_inp_end = inpe;
7112         it->no_chunk_output = chunk_output_off;
7113         it->vn = curvnet;
7114         if (s_inp) {
7115                 /* Assume lock is held here */
7116                 it->inp = s_inp;
7117                 SCTP_INP_INCR_REF(it->inp);
7118                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7119         } else {
7120                 SCTP_INP_INFO_RLOCK();
7121                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7122                 if (it->inp) {
7123                         SCTP_INP_INCR_REF(it->inp);
7124                 }
7125                 SCTP_INP_INFO_RUNLOCK();
7126                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7127
7128         }
7129         SCTP_IPI_ITERATOR_WQ_LOCK();
7130
7131         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7132         if (sctp_it_ctl.iterator_running == 0) {
7133                 sctp_wakeup_iterator();
7134         }
7135         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7136         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7137         return (0);
7138 }