sys/netinet/sctp_pcb.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
   5  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
   6  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are met:
  10  *
  11  * a) Redistributions of source code must retain the above copyright notice,
  12  *    this list of conditions and the following disclaimer.
  13  *
  14  * b) Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the distribution.
  17  *
  18  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  19  *    contributors may be used to endorse or promote products derived
  20  *    from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  24  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  26  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  32  * THE POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 __FBSDID("$FreeBSD$");
  37
  38 #include <netinet/sctp_os.h>
  39 #include <sys/proc.h>
  40 #include <netinet/sctp_var.h>
  41 #include <netinet/sctp_sysctl.h>
  42 #include <netinet/sctp_pcb.h>
  43 #include <netinet/sctputil.h>
  44 #include <netinet/sctp.h>
  45 #include <netinet/sctp_header.h>
  46 #include <netinet/sctp_asconf.h>
  47 #include <netinet/sctp_output.h>
  48 #include <netinet/sctp_timer.h>
  49 #include <netinet/sctp_bsd_addr.h>
  50 #if defined(INET) || defined(INET6)
  51 #include <netinet/udp.h>
  52 #endif
  53 #ifdef INET6
  54 #include <netinet6/ip6_var.h>
  55 #endif
  56 #include <sys/sched.h>
  57 #include <sys/smp.h>
  58 #include <sys/unistd.h>
  59
  60 /* FIX: we don't handle multiple link local scopes */
  61 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  62 #ifdef INET6
  63 int
  64 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  65 {
  66         struct sockaddr_in6 tmp_a, tmp_b;
  67
  68         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  69         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  70                 return (0);
  71         }
  72         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  73         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  74                 return (0);
  75         }
  76         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  77 }
  78 #endif
  79
  80 void
  81 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  82 {
  83         /*
  84          * We really don't need to lock this, but I will just because it
  85          * does not hurt.
  86          */
  87         SCTP_INP_INFO_RLOCK();
  88         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  89         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  90         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  91         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  92         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  93         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  94         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  95         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
  96         SCTP_INP_INFO_RUNLOCK();
  97 }
  98
  99 /*-
 100  * Addresses are added to VRF's (Virtual Router's). For BSD we
 101  * have only the default VRF 0. We maintain a hash list of
 102  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
 103  * these has a list of addresses. When we add a new address
 104  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 105  * not exist we create it and add it to the list of IFN's
 106  * within the VRF. Once we have the sctp_ifn, we add the
 107  * address to the list. So we look something like:
 108  *
 109  * hash-vrf-table
 110  *   vrf-> ifn-> ifn -> ifn
 111  *   vrf    |
 112  *    ...   +--ifa-> ifa -> ifa
 113  *   vrf
 114  *
 115  * We keep these separate lists since the SCTP subsystem will
 116  * point to these from its source address selection nets structure.
 117  * When an address is deleted it does not happen right away on
 118  * the SCTP side, it gets scheduled. What we do when a
 119  * delete happens is immediately remove the address from
 120  * the master list and decrement the refcount. As our
 121  * addip iterator works through and frees the src address
 122  * selection pointing to the sctp_ifa, eventually the refcount
 123  * will reach 0 and we will delete it. Note that it is assumed
 124  * that any locking on system level ifn/ifa is done at the
 125  * caller of these functions and these routines will only
 126  * lock the SCTP structures as they add or delete things.
 127  *
 128  * Other notes on VRF concepts.
 129  *  - An endpoint can be in multiple VRF's
 130  *  - An association lives within a VRF and only one VRF.
 131  *  - Any incoming packet we can deduce the VRF for by
 132  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 133  *  - Any downward send call or connect call must supply the
 134  *    VRF via ancillary data or via some sort of set default
 135  *    VRF socket option call (again for BSD no brainer since
 136  *    the VRF is always 0).
 137  *  - An endpoint may add multiple VRF's to it.
 138  *  - Listening sockets can accept associations in any
 139  *    of the VRF's they are in but the assoc will end up
 140  *    in only one VRF (gotten from the packet or connect/send).
 141  *
 142  */
 143
 144 struct sctp_vrf *
 145 sctp_allocate_vrf(int vrf_id)
 146 {
 147         struct sctp_vrf *vrf = NULL;
 148         struct sctp_vrflist *bucket;
 149
 150         /* First allocate the VRF structure */
 151         vrf = sctp_find_vrf(vrf_id);
 152         if (vrf) {
 153                 /* Already allocated */
 154                 return (vrf);
 155         }
 156         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 157             SCTP_M_VRF);
 158         if (vrf == NULL) {
 159                 /* No memory */
 160 #ifdef INVARIANTS
 161                 panic("No memory for VRF:%d", vrf_id);
 162 #endif
 163                 return (NULL);
 164         }
 165         /* setup the VRF */
 166         memset(vrf, 0, sizeof(struct sctp_vrf));
 167         vrf->vrf_id = vrf_id;
 168         LIST_INIT(&vrf->ifnlist);
 169         vrf->total_ifa_count = 0;
 170         vrf->refcount = 0;
 171         /* now also setup table ids */
 172         SCTP_INIT_VRF_TABLEID(vrf);
 173         /* Init the HASH of addresses */
 174         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 175             &vrf->vrf_addr_hashmark);
 176         if (vrf->vrf_addr_hash == NULL) {
 177                 /* No memory */
 178 #ifdef INVARIANTS
 179                 panic("No memory for VRF:%d", vrf_id);
 180 #endif
 181                 SCTP_FREE(vrf, SCTP_M_VRF);
 182                 return (NULL);
 183         }
 184
 185         /* Add it to the hash table */
 186         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 187         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 188         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 189         return (vrf);
 190 }
 191
 192 struct sctp_ifn *
 193 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 194 {
 195         struct sctp_ifn *sctp_ifnp;
 196         struct sctp_ifnlist *hash_ifn_head;
 197
 198         /*
 199          * We assume the lock is held for the addresses if that's wrong
 200          * problems could occur :-)
 201          */
 202         SCTP_IPI_ADDR_LOCK_ASSERT();
 203         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 204         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 205                 if (sctp_ifnp->ifn_index == ifn_index) {
 206                         return (sctp_ifnp);
 207                 }
 208                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 209                         return (sctp_ifnp);
 210                 }
 211         }
 212         return (NULL);
 213 }
 214
 215 struct sctp_vrf *
 216 sctp_find_vrf(uint32_t vrf_id)
 217 {
 218         struct sctp_vrflist *bucket;
 219         struct sctp_vrf *liste;
 220
 221         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 222         LIST_FOREACH(liste, bucket, next_vrf) {
 223                 if (vrf_id == liste->vrf_id) {
 224                         return (liste);
 225                 }
 226         }
 227         return (NULL);
 228 }
 229
 230 void
 231 sctp_free_vrf(struct sctp_vrf *vrf)
 232 {
 233         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 234                 if (vrf->vrf_addr_hash) {
 235                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 236                         vrf->vrf_addr_hash = NULL;
 237                 }
 238                 /* We zero'd the count */
 239                 LIST_REMOVE(vrf, next_vrf);
 240                 SCTP_FREE(vrf, SCTP_M_VRF);
 241                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 242         }
 243 }
 244
 245 void
 246 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 247 {
 248         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 249                 /* We zero'd the count */
 250                 if (sctp_ifnp->vrf) {
 251                         sctp_free_vrf(sctp_ifnp->vrf);
 252                 }
 253                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 254                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 255         }
 256 }
 257
 258 void
 259 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 260 {
 261         struct sctp_ifn *sctp_ifnp;
 262
 263         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 264         if (sctp_ifnp != NULL) {
 265                 sctp_ifnp->ifn_mtu = mtu;
 266         }
 267 }
 268
 269 void
 270 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 271 {
 272         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 273                 /* We zero'd the count */
 274                 if (sctp_ifap->ifn_p) {
 275                         sctp_free_ifn(sctp_ifap->ifn_p);
 276                 }
 277                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 278                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 279         }
 280 }
 281
 282 static void
 283 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 284 {
 285         struct sctp_ifn *found;
 286
 287         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 288         if (found == NULL) {
 289                 /* Not in the list.. sorry */
 290                 return;
 291         }
 292         if (hold_addr_lock == 0) {
 293                 SCTP_IPI_ADDR_WLOCK();
 294         } else {
 295                 SCTP_IPI_ADDR_WLOCK_ASSERT();
 296         }
 297         LIST_REMOVE(sctp_ifnp, next_bucket);
 298         LIST_REMOVE(sctp_ifnp, next_ifn);
 299         if (hold_addr_lock == 0) {
 300                 SCTP_IPI_ADDR_WUNLOCK();
 301         }
 302         /* Take away the reference, and possibly free it */
 303         sctp_free_ifn(sctp_ifnp);
 304 }
 305
 306 void
 307 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 308     const char *if_name, uint32_t ifn_index)
 309 {
 310         struct sctp_vrf *vrf;
 311         struct sctp_ifa *sctp_ifap;
 312
 313         SCTP_IPI_ADDR_RLOCK();
 314         vrf = sctp_find_vrf(vrf_id);
 315         if (vrf == NULL) {
 316                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 317                 goto out;
 318         }
 319         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 320         if (sctp_ifap == NULL) {
 321                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 322                 goto out;
 323         }
 324         if (sctp_ifap->ifn_p == NULL) {
 325                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
 326                 goto out;
 327         }
 328         if (if_name) {
 329                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 330                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 331                             sctp_ifap->ifn_p->ifn_name, if_name);
 332                         goto out;
 333                 }
 334         } else {
 335                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 336                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 337                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 338                         goto out;
 339                 }
 340         }
 341
 342         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 343         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 344 out:
 345         SCTP_IPI_ADDR_RUNLOCK();
 346 }
 347
 348 void
 349 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 350     const char *if_name, uint32_t ifn_index)
 351 {
 352         struct sctp_vrf *vrf;
 353         struct sctp_ifa *sctp_ifap;
 354
 355         SCTP_IPI_ADDR_RLOCK();
 356         vrf = sctp_find_vrf(vrf_id);
 357         if (vrf == NULL) {
 358                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 359                 goto out;
 360         }
 361         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 362         if (sctp_ifap == NULL) {
 363                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 364                 goto out;
 365         }
 366         if (sctp_ifap->ifn_p == NULL) {
 367                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
 368                 goto out;
 369         }
 370         if (if_name) {
 371                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 372                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 373                             sctp_ifap->ifn_p->ifn_name, if_name);
 374                         goto out;
 375                 }
 376         } else {
 377                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 378                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 379                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 380                         goto out;
 381                 }
 382         }
 383
 384         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 385         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 386 out:
 387         SCTP_IPI_ADDR_RUNLOCK();
 388 }
 389
 390 /*-
 391  * Add an ifa to an ifn.
 392  * Register the interface as necessary.
 393  * NOTE: ADDR write lock MUST be held.
 394  */
 395 static void
 396 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 397 {
 398         int ifa_af;
 399
 400         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 401         sctp_ifap->ifn_p = sctp_ifnp;
 402         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 403         /* update address counts */
 404         sctp_ifnp->ifa_count++;
 405         ifa_af = sctp_ifap->address.sa.sa_family;
 406         switch (ifa_af) {
 407 #ifdef INET
 408         case AF_INET:
 409                 sctp_ifnp->num_v4++;
 410                 break;
 411 #endif
 412 #ifdef INET6
 413         case AF_INET6:
 414                 sctp_ifnp->num_v6++;
 415                 break;
 416 #endif
 417         default:
 418                 break;
 419         }
 420         if (sctp_ifnp->ifa_count == 1) {
 421                 /* register the new interface */
 422                 sctp_ifnp->registered_af = ifa_af;
 423         }
 424 }
 425
 426 /*-
 427  * Remove an ifa from its ifn.
 428  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 429  * the interface based on the remaining address families left.
 430  * NOTE: ADDR write lock MUST be held.
 431  */
 432 static void
 433 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 434 {
 435         LIST_REMOVE(sctp_ifap, next_ifa);
 436         if (sctp_ifap->ifn_p) {
 437                 /* update address counts */
 438                 sctp_ifap->ifn_p->ifa_count--;
 439                 switch (sctp_ifap->address.sa.sa_family) {
 440 #ifdef INET
 441                 case AF_INET:
 442                         sctp_ifap->ifn_p->num_v4--;
 443                         break;
 444 #endif
 445 #ifdef INET6
 446                 case AF_INET6:
 447                         sctp_ifap->ifn_p->num_v6--;
 448                         break;
 449 #endif
 450                 default:
 451                         break;
 452                 }
 453
 454                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 455                         /* remove the ifn, possibly freeing it */
 456                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 457                 } else {
 458                         /* re-register address family type, if needed */
 459                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 460                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 461                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 462                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 463                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 464                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 465                         }
 466                         /* free the ifn refcount */
 467                         sctp_free_ifn(sctp_ifap->ifn_p);
 468                 }
 469                 sctp_ifap->ifn_p = NULL;
 470         }
 471 }
 472
 473 struct sctp_ifa *
 474 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 475     uint32_t ifn_type, const char *if_name, void *ifa,
 476     struct sockaddr *addr, uint32_t ifa_flags,
 477     int dynamic_add)
 478 {
 479         struct sctp_vrf *vrf;
 480         struct sctp_ifn *sctp_ifnp, *new_sctp_ifnp;
 481         struct sctp_ifa *sctp_ifap, *new_sctp_ifap;
 482         struct sctp_ifalist *hash_addr_head;
 483         struct sctp_ifnlist *hash_ifn_head;
 484         uint32_t hash_of_addr;
 485         int new_ifn_af = 0;
 486
 487 #ifdef SCTP_DEBUG
 488         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 489         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 490 #endif
 491         SCTP_MALLOC(new_sctp_ifnp, struct sctp_ifn *,
 492             sizeof(struct sctp_ifn), SCTP_M_IFN);
 493         if (new_sctp_ifnp == NULL) {
 494 #ifdef INVARIANTS
 495                 panic("No memory for IFN");
 496 #endif
 497                 return (NULL);
 498         }
 499         SCTP_MALLOC(new_sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 500         if (new_sctp_ifap == NULL) {
 501 #ifdef INVARIANTS
 502                 panic("No memory for IFA");
 503 #endif
 504                 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
 505                 return (NULL);
 506         }
 507
 508         SCTP_IPI_ADDR_WLOCK();
 509         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 510         if (sctp_ifnp) {
 511                 vrf = sctp_ifnp->vrf;
 512         } else {
 513                 vrf = sctp_find_vrf(vrf_id);
 514                 if (vrf == NULL) {
 515                         vrf = sctp_allocate_vrf(vrf_id);
 516                         if (vrf == NULL) {
 517                                 SCTP_IPI_ADDR_WUNLOCK();
 518                                 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
 519                                 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA);
 520                                 return (NULL);
 521                         }
 522                 }
 523         }
 524         if (sctp_ifnp == NULL) {
 525                 /*
 526                  * build one and add it, can't hold lock until after malloc
 527                  * done though.
 528                  */
 529                 sctp_ifnp = new_sctp_ifnp;
 530                 new_sctp_ifnp = NULL;
 531                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 532                 sctp_ifnp->ifn_index = ifn_index;
 533                 sctp_ifnp->ifn_p = ifn;
 534                 sctp_ifnp->ifn_type = ifn_type;
 535                 sctp_ifnp->refcount = 0;
 536                 sctp_ifnp->vrf = vrf;
 537                 atomic_add_int(&vrf->refcount, 1);
 538                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index);
 539                 if (if_name != NULL) {
 540                         SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
 541                 } else {
 542                         SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
 543                 }
 544                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 545                 LIST_INIT(&sctp_ifnp->ifalist);
 546                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 547                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 548                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 549                 new_ifn_af = 1;
 550         }
 551         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 552         if (sctp_ifap) {
 553                 /* Hmm, it already exists? */
 554                 if ((sctp_ifap->ifn_p) &&
 555                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 556                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 557                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 558                             (void *)sctp_ifap);
 559                         if (new_ifn_af) {
 560                                 /* Remove the created one that we don't want */
 561                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 562                         }
 563                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 564                                 /* easy to solve, just switch back to active */
 565                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 566                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 567                                 sctp_ifap->ifn_p = sctp_ifnp;
 568                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 569                         }
 570         exit_stage_left:
 571                         SCTP_IPI_ADDR_WUNLOCK();
 572                         if (new_sctp_ifnp != NULL) {
 573                                 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
 574                         }
 575                         SCTP_FREE(new_sctp_ifap, SCTP_M_IFA);
 576                         return (sctp_ifap);
 577                 } else {
 578                         if (sctp_ifap->ifn_p) {
 579                                 /*
 580                                  * The last IFN gets the address, remove the
 581                                  * old one
 582                                  */
 583                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 584                                     (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 585                                     sctp_ifap->ifn_p->ifn_index, if_name,
 586                                     ifn_index);
 587                                 /* remove the address from the old ifn */
 588                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 589                                 /* move the address over to the new ifn */
 590                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 591                                 goto exit_stage_left;
 592                         } else {
 593                                 /* repair ifnp which was NULL ? */
 594                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 595                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 596                                     (void *)sctp_ifnp, (void *)sctp_ifap);
 597                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 598                         }
 599                         goto exit_stage_left;
 600                 }
 601         }
 602         sctp_ifap = new_sctp_ifap;
 603         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 604         sctp_ifap->ifn_p = sctp_ifnp;
 605         atomic_add_int(&sctp_ifnp->refcount, 1);
 606         sctp_ifap->vrf_id = vrf_id;
 607         sctp_ifap->ifa = ifa;
 608         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 609         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 610         sctp_ifap->flags = ifa_flags;
 611         /* Set scope */
 612         switch (sctp_ifap->address.sa.sa_family) {
 613 #ifdef INET
 614         case AF_INET:
 615                 {
 616                         struct sockaddr_in *sin;
 617
 618                         sin = &sctp_ifap->address.sin;
 619                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 620                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 621                                 sctp_ifap->src_is_loop = 1;
 622                         }
 623                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 624                                 sctp_ifap->src_is_priv = 1;
 625                         }
 626                         sctp_ifnp->num_v4++;
 627                         if (new_ifn_af)
 628                                 new_ifn_af = AF_INET;
 629                         break;
 630                 }
 631 #endif
 632 #ifdef INET6
 633         case AF_INET6:
 634                 {
 635                         /* ok to use deprecated addresses? */
 636                         struct sockaddr_in6 *sin6;
 637
 638                         sin6 = &sctp_ifap->address.sin6;
 639                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 640                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 641                                 sctp_ifap->src_is_loop = 1;
 642                         }
 643                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 644                                 sctp_ifap->src_is_priv = 1;
 645                         }
 646                         sctp_ifnp->num_v6++;
 647                         if (new_ifn_af)
 648                                 new_ifn_af = AF_INET6;
 649                         break;
 650                 }
 651 #endif
 652         default:
 653                 new_ifn_af = 0;
 654                 break;
 655         }
 656         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 657
 658         if ((sctp_ifap->src_is_priv == 0) &&
 659             (sctp_ifap->src_is_loop == 0)) {
 660                 sctp_ifap->src_is_glob = 1;
 661         }
 662         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 663         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 664         sctp_ifap->refcount = 1;
 665         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 666         sctp_ifnp->ifa_count++;
 667         vrf->total_ifa_count++;
 668         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 669         if (new_ifn_af) {
 670                 sctp_ifnp->registered_af = new_ifn_af;
 671         }
 672         SCTP_IPI_ADDR_WUNLOCK();
 673         if (new_sctp_ifnp != NULL) {
 674                 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
 675         }
 676
 677         if (dynamic_add) {
 678                 /*
 679                  * Bump up the refcount so that when the timer completes it
 680                  * will drop back down.
 681                  */
 682                 struct sctp_laddr *wi;
 683
 684                 atomic_add_int(&sctp_ifap->refcount, 1);
 685                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 686                 if (wi == NULL) {
 687                         /*
 688                          * Gak, what can we do? We have lost an address
 689                          * change can you say HOSED?
 690                          */
 691                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 692                         /* Opps, must decrement the count */
 693                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 694                             if_name);
 695                         return (NULL);
 696                 }
 697                 SCTP_INCR_LADDR_COUNT();
 698                 memset(wi, 0, sizeof(*wi));
 699                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 700                 wi->ifa = sctp_ifap;
 701                 wi->action = SCTP_ADD_IP_ADDRESS;
 702
 703                 SCTP_WQ_ADDR_LOCK();
 704                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 705                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 706                     (struct sctp_inpcb *)NULL,
 707                     (struct sctp_tcb *)NULL,
 708                     (struct sctp_nets *)NULL);
 709                 SCTP_WQ_ADDR_UNLOCK();
 710         } else {
 711                 /* it's ready for use */
 712                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 713         }
 714         return (sctp_ifap);
 715 }
 716
 717 void
 718 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 719     uint32_t ifn_index, const char *if_name)
 720 {
 721         struct sctp_vrf *vrf;
 722         struct sctp_ifa *sctp_ifap = NULL;
 723
 724         SCTP_IPI_ADDR_WLOCK();
 725         vrf = sctp_find_vrf(vrf_id);
 726         if (vrf == NULL) {
 727                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 728                 goto out_now;
 729         }
 730
 731 #ifdef SCTP_DEBUG
 732         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 733         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 734 #endif
 735         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 736         if (sctp_ifap) {
 737                 /* Validate the delete */
 738                 if (sctp_ifap->ifn_p) {
 739                         int valid = 0;
 740
 741                         /*-
 742                          * The name has priority over the ifn_index
 743                          * if its given.
 744                          */
 745                         if (if_name) {
 746                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 747                                         /* They match its a correct delete */
 748                                         valid = 1;
 749                                 }
 750                         }
 751                         if (!valid) {
 752                                 /* last ditch check ifn_index */
 753                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 754                                         valid = 1;
 755                                 }
 756                         }
 757                         if (!valid) {
 758                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 759                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 760                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 761                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 762                                 SCTP_IPI_ADDR_WUNLOCK();
 763                                 return;
 764                         }
 765                 }
 766                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
 767                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 768                 /*
 769                  * We don't set the flag. This means that the structure will
 770                  * hang around in EP's that have bound specific to it until
 771                  * they close. This gives us TCP like behavior if someone
 772                  * removes an address (or for that matter adds it right
 773                  * back).
 774                  */
 775                 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
 776                 vrf->total_ifa_count--;
 777                 LIST_REMOVE(sctp_ifap, next_bucket);
 778                 sctp_remove_ifa_from_ifn(sctp_ifap);
 779         }
 780 #ifdef SCTP_DEBUG
 781         else {
 782                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 783                     ifn_index);
 784                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 785         }
 786 #endif
 787
 788 out_now:
 789         SCTP_IPI_ADDR_WUNLOCK();
 790         if (sctp_ifap) {
 791                 struct sctp_laddr *wi;
 792
 793                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 794                 if (wi == NULL) {
 795                         /*
 796                          * Gak, what can we do? We have lost an address
 797                          * change can you say HOSED?
 798                          */
 799                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 800
 801                         /* Oops, must decrement the count */
 802                         sctp_free_ifa(sctp_ifap);
 803                         return;
 804                 }
 805                 SCTP_INCR_LADDR_COUNT();
 806                 memset(wi, 0, sizeof(*wi));
 807                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 808                 wi->ifa = sctp_ifap;
 809                 wi->action = SCTP_DEL_IP_ADDRESS;
 810                 SCTP_WQ_ADDR_LOCK();
 811                 /*
 812                  * Should this really be a tailq? As it is we will process
 813                  * the newest first :-0
 814                  */
 815                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 816                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 817                     (struct sctp_inpcb *)NULL,
 818                     (struct sctp_tcb *)NULL,
 819                     (struct sctp_nets *)NULL);
 820                 SCTP_WQ_ADDR_UNLOCK();
 821         }
 822         return;
 823 }
 824
 825 static int
 826 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
 827 {
 828         int loopback_scope;
 829 #if defined(INET)
 830         int ipv4_local_scope, ipv4_addr_legal;
 831 #endif
 832 #if defined(INET6)
 833         int local_scope, site_scope, ipv6_addr_legal;
 834 #endif
 835         struct sctp_vrf *vrf;
 836         struct sctp_ifn *sctp_ifn;
 837         struct sctp_ifa *sctp_ifa;
 838
 839         loopback_scope = stcb->asoc.scope.loopback_scope;
 840 #if defined(INET)
 841         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
 842         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
 843 #endif
 844 #if defined(INET6)
 845         local_scope = stcb->asoc.scope.local_scope;
 846         site_scope = stcb->asoc.scope.site_scope;
 847         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
 848 #endif
 849
 850         SCTP_IPI_ADDR_RLOCK();
 851         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
 852         if (vrf == NULL) {
 853                 /* no vrf, no addresses */
 854                 SCTP_IPI_ADDR_RUNLOCK();
 855                 return (0);
 856         }
 857
 858         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 859                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 860                         if ((loopback_scope == 0) &&
 861                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 862                                 continue;
 863                         }
 864                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 865                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
 866                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
 867                                         /*
 868                                          * We allow pending addresses, where
 869                                          * we have sent an asconf-add to be
 870                                          * considered valid.
 871                                          */
 872                                         continue;
 873                                 }
 874                                 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
 875                                         continue;
 876                                 }
 877                                 switch (sctp_ifa->address.sa.sa_family) {
 878 #ifdef INET
 879                                 case AF_INET:
 880                                         if (ipv4_addr_legal) {
 881                                                 struct sockaddr_in *sin,
 882                                                            *rsin;
 883
 884                                                 sin = &sctp_ifa->address.sin;
 885                                                 rsin = (struct sockaddr_in *)to;
 886                                                 if ((ipv4_local_scope == 0) &&
 887                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 888                                                         continue;
 889                                                 }
 890                                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
 891                                                     &sin->sin_addr) != 0) {
 892                                                         continue;
 893                                                 }
 894                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 895                                                         SCTP_IPI_ADDR_RUNLOCK();
 896                                                         return (1);
 897                                                 }
 898                                         }
 899                                         break;
 900 #endif
 901 #ifdef INET6
 902                                 case AF_INET6:
 903                                         if (ipv6_addr_legal) {
 904                                                 struct sockaddr_in6 *sin6,
 905                                                             *rsin6;
 906
 907                                                 sin6 = &sctp_ifa->address.sin6;
 908                                                 rsin6 = (struct sockaddr_in6 *)to;
 909                                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
 910                                                     &sin6->sin6_addr) != 0) {
 911                                                         continue;
 912                                                 }
 913                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 914                                                         if (local_scope == 0)
 915                                                                 continue;
 916                                                         if (sin6->sin6_scope_id == 0) {
 917                                                                 if (sa6_recoverscope(sin6) != 0)
 918                                                                         continue;
 919                                                         }
 920                                                 }
 921                                                 if ((site_scope == 0) &&
 922                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
 923                                                         continue;
 924                                                 }
 925                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 926                                                         SCTP_IPI_ADDR_RUNLOCK();
 927                                                         return (1);
 928                                                 }
 929                                         }
 930                                         break;
 931 #endif
 932                                 default:
 933                                         /* TSNH */
 934                                         break;
 935                                 }
 936                         }
 937                 }
 938         } else {
 939                 struct sctp_laddr *laddr;
 940
 941                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
 942                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 943                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 944                                 continue;
 945                         }
 946                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
 947                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
 948                                 /*
 949                                  * We allow pending addresses, where we have
 950                                  * sent an asconf-add to be considered
 951                                  * valid.
 952                                  */
 953                                 continue;
 954                         }
 955                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
 956                                 continue;
 957                         }
 958                         switch (to->sa_family) {
 959 #ifdef INET
 960                         case AF_INET:
 961                                 {
 962                                         struct sockaddr_in *sin, *rsin;
 963
 964                                         sin = &laddr->ifa->address.sin;
 965                                         rsin = (struct sockaddr_in *)to;
 966                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 967                                                 SCTP_IPI_ADDR_RUNLOCK();
 968                                                 return (1);
 969                                         }
 970                                         break;
 971                                 }
 972 #endif
 973 #ifdef INET6
 974                         case AF_INET6:
 975                                 {
 976                                         struct sockaddr_in6 *sin6, *rsin6;
 977
 978                                         sin6 = &laddr->ifa->address.sin6;
 979                                         rsin6 = (struct sockaddr_in6 *)to;
 980                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 981                                                 SCTP_IPI_ADDR_RUNLOCK();
 982                                                 return (1);
 983                                         }
 984                                         break;
 985                                 }
 986
 987 #endif
 988                         default:
 989                                 /* TSNH */
 990                                 break;
 991                         }
 992                 }
 993         }
 994         SCTP_IPI_ADDR_RUNLOCK();
 995         return (0);
 996 }
 997
 998 static struct sctp_tcb *
 999 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1000     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1001 {
1002         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1003         /*
1004          * If we support the TCP model, then we must now dig through to see
1005          * if we can find our endpoint in the list of tcp ep's.
1006          */
1007         uint16_t lport, rport;
1008         struct sctppcbhead *ephead;
1009         struct sctp_inpcb *inp;
1010         struct sctp_laddr *laddr;
1011         struct sctp_tcb *stcb;
1012         struct sctp_nets *net;
1013
1014         if ((to == NULL) || (from == NULL)) {
1015                 return (NULL);
1016         }
1017
1018         switch (to->sa_family) {
1019 #ifdef INET
1020         case AF_INET:
1021                 if (from->sa_family == AF_INET) {
1022                         lport = ((struct sockaddr_in *)to)->sin_port;
1023                         rport = ((struct sockaddr_in *)from)->sin_port;
1024                 } else {
1025                         return (NULL);
1026                 }
1027                 break;
1028 #endif
1029 #ifdef INET6
1030         case AF_INET6:
1031                 if (from->sa_family == AF_INET6) {
1032                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
1033                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
1034                 } else {
1035                         return (NULL);
1036                 }
1037                 break;
1038 #endif
1039         default:
1040                 return (NULL);
1041         }
1042         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1043         /*
1044          * Ok now for each of the guys in this bucket we must look and see:
1045          * - Does the remote port match. - Does there single association's
1046          * addresses match this address (to). If so we update p_ep to point
1047          * to this ep and return the tcb from it.
1048          */
1049         LIST_FOREACH(inp, ephead, sctp_hash) {
1050                 SCTP_INP_RLOCK(inp);
1051                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1052                         SCTP_INP_RUNLOCK(inp);
1053                         continue;
1054                 }
1055                 if (lport != inp->sctp_lport) {
1056                         SCTP_INP_RUNLOCK(inp);
1057                         continue;
1058                 }
1059                 switch (to->sa_family) {
1060 #ifdef INET
1061                 case AF_INET:
1062                         {
1063                                 struct sockaddr_in *sin;
1064
1065                                 sin = (struct sockaddr_in *)to;
1066                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1067                                     &sin->sin_addr) != 0) {
1068                                         SCTP_INP_RUNLOCK(inp);
1069                                         continue;
1070                                 }
1071                                 break;
1072                         }
1073 #endif
1074 #ifdef INET6
1075                 case AF_INET6:
1076                         {
1077                                 struct sockaddr_in6 *sin6;
1078
1079                                 sin6 = (struct sockaddr_in6 *)to;
1080                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1081                                     &sin6->sin6_addr) != 0) {
1082                                         SCTP_INP_RUNLOCK(inp);
1083                                         continue;
1084                                 }
1085                                 break;
1086                         }
1087 #endif
1088                 default:
1089                         SCTP_INP_RUNLOCK(inp);
1090                         continue;
1091                 }
1092                 if (inp->def_vrf_id != vrf_id) {
1093                         SCTP_INP_RUNLOCK(inp);
1094                         continue;
1095                 }
1096                 /* check to see if the ep has one of the addresses */
1097                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1098                         /* We are NOT bound all, so look further */
1099                         int match = 0;
1100
1101                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1102                                 if (laddr->ifa == NULL) {
1103                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__);
1104                                         continue;
1105                                 }
1106                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1107                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1108                                         continue;
1109                                 }
1110                                 if (laddr->ifa->address.sa.sa_family ==
1111                                     to->sa_family) {
1112                                         /* see if it matches */
1113 #ifdef INET
1114                                         if (from->sa_family == AF_INET) {
1115                                                 struct sockaddr_in *intf_addr,
1116                                                            *sin;
1117
1118                                                 intf_addr = &laddr->ifa->address.sin;
1119                                                 sin = (struct sockaddr_in *)to;
1120                                                 if (sin->sin_addr.s_addr ==
1121                                                     intf_addr->sin_addr.s_addr) {
1122                                                         match = 1;
1123                                                         break;
1124                                                 }
1125                                         }
1126 #endif
1127 #ifdef INET6
1128                                         if (from->sa_family == AF_INET6) {
1129                                                 struct sockaddr_in6 *intf_addr6;
1130                                                 struct sockaddr_in6 *sin6;
1131
1132                                                 sin6 = (struct sockaddr_in6 *)
1133                                                     to;
1134                                                 intf_addr6 = &laddr->ifa->address.sin6;
1135
1136                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1137                                                     intf_addr6)) {
1138                                                         match = 1;
1139                                                         break;
1140                                                 }
1141                                         }
1142 #endif
1143                                 }
1144                         }
1145                         if (match == 0) {
1146                                 /* This endpoint does not have this address */
1147                                 SCTP_INP_RUNLOCK(inp);
1148                                 continue;
1149                         }
1150                 }
1151                 /*
1152                  * Ok if we hit here the ep has the address, does it hold
1153                  * the tcb?
1154                  */
1155                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1156                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1157                 if (stcb == NULL) {
1158                         SCTP_INP_RUNLOCK(inp);
1159                         continue;
1160                 }
1161                 SCTP_TCB_LOCK(stcb);
1162                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1163                         SCTP_TCB_UNLOCK(stcb);
1164                         SCTP_INP_RUNLOCK(inp);
1165                         continue;
1166                 }
1167                 if (stcb->rport != rport) {
1168                         /* remote port does not match. */
1169                         SCTP_TCB_UNLOCK(stcb);
1170                         SCTP_INP_RUNLOCK(inp);
1171                         continue;
1172                 }
1173                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1174                         SCTP_TCB_UNLOCK(stcb);
1175                         SCTP_INP_RUNLOCK(inp);
1176                         continue;
1177                 }
1178                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1179                         SCTP_TCB_UNLOCK(stcb);
1180                         SCTP_INP_RUNLOCK(inp);
1181                         continue;
1182                 }
1183                 /* Does this TCB have a matching address? */
1184                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1185                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1186                                 /* not the same family, can't be a match */
1187                                 continue;
1188                         }
1189                         switch (from->sa_family) {
1190 #ifdef INET
1191                         case AF_INET:
1192                                 {
1193                                         struct sockaddr_in *sin, *rsin;
1194
1195                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
1196                                         rsin = (struct sockaddr_in *)from;
1197                                         if (sin->sin_addr.s_addr ==
1198                                             rsin->sin_addr.s_addr) {
1199                                                 /* found it */
1200                                                 if (netp != NULL) {
1201                                                         *netp = net;
1202                                                 }
1203                                                 /*
1204                                                  * Update the endpoint
1205                                                  * pointer
1206                                                  */
1207                                                 *inp_p = inp;
1208                                                 SCTP_INP_RUNLOCK(inp);
1209                                                 return (stcb);
1210                                         }
1211                                         break;
1212                                 }
1213 #endif
1214 #ifdef INET6
1215                         case AF_INET6:
1216                                 {
1217                                         struct sockaddr_in6 *sin6, *rsin6;
1218
1219                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1220                                         rsin6 = (struct sockaddr_in6 *)from;
1221                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1222                                             rsin6)) {
1223                                                 /* found it */
1224                                                 if (netp != NULL) {
1225                                                         *netp = net;
1226                                                 }
1227                                                 /*
1228                                                  * Update the endpoint
1229                                                  * pointer
1230                                                  */
1231                                                 *inp_p = inp;
1232                                                 SCTP_INP_RUNLOCK(inp);
1233                                                 return (stcb);
1234                                         }
1235                                         break;
1236                                 }
1237 #endif
1238                         default:
1239                                 /* TSNH */
1240                                 break;
1241                         }
1242                 }
1243                 SCTP_TCB_UNLOCK(stcb);
1244                 SCTP_INP_RUNLOCK(inp);
1245         }
1246         return (NULL);
1247 }
1248
1249 /*
1250  * rules for use
1251  *
1252  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1253  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1254  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1255  * NULL.
1256  */
1257
1258 struct sctp_tcb *
1259 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1260     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1261 {
1262         struct sctpasochead *head;
1263         struct sctp_inpcb *inp;
1264         struct sctp_tcb *stcb = NULL;
1265         struct sctp_nets *net;
1266         uint16_t rport;
1267
1268         inp = *inp_p;
1269         switch (remote->sa_family) {
1270 #ifdef INET
1271         case AF_INET:
1272                 rport = (((struct sockaddr_in *)remote)->sin_port);
1273                 break;
1274 #endif
1275 #ifdef INET6
1276         case AF_INET6:
1277                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1278                 break;
1279 #endif
1280         default:
1281                 return (NULL);
1282         }
1283         if (locked_tcb) {
1284                 /*
1285                  * UN-lock so we can do proper locking here this occurs when
1286                  * called from load_addresses_from_init.
1287                  */
1288                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1289                 SCTP_TCB_UNLOCK(locked_tcb);
1290         }
1291         SCTP_INP_INFO_RLOCK();
1292         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1293             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1294                 /*-
1295                  * Now either this guy is our listener or it's the
1296                  * connector. If it is the one that issued the connect, then
1297                  * it's only chance is to be the first TCB in the list. If
1298                  * it is the acceptor, then do the special_lookup to hash
1299                  * and find the real inp.
1300                  */
1301                 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) {
1302                         /* to is peer addr, from is my addr */
1303                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1304                             netp, inp->def_vrf_id);
1305                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1306                                 /* we have a locked tcb, lower refcount */
1307                                 SCTP_INP_DECR_REF(inp);
1308                         }
1309                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1310                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1311                                 SCTP_TCB_LOCK(locked_tcb);
1312                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1313                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1314                         }
1315                         SCTP_INP_INFO_RUNLOCK();
1316                         return (stcb);
1317                 } else {
1318                         SCTP_INP_WLOCK(inp);
1319                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1320                                 goto null_return;
1321                         }
1322                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1323                         if (stcb == NULL) {
1324                                 goto null_return;
1325                         }
1326                         SCTP_TCB_LOCK(stcb);
1327
1328                         if (stcb->rport != rport) {
1329                                 /* remote port does not match. */
1330                                 SCTP_TCB_UNLOCK(stcb);
1331                                 goto null_return;
1332                         }
1333                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1334                                 SCTP_TCB_UNLOCK(stcb);
1335                                 goto null_return;
1336                         }
1337                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1338                                 SCTP_TCB_UNLOCK(stcb);
1339                                 goto null_return;
1340                         }
1341                         /* now look at the list of remote addresses */
1342                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1343 #ifdef INVARIANTS
1344                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1345                                         panic("Corrupt net list");
1346                                 }
1347 #endif
1348                                 if (net->ro._l_addr.sa.sa_family !=
1349                                     remote->sa_family) {
1350                                         /* not the same family */
1351                                         continue;
1352                                 }
1353                                 switch (remote->sa_family) {
1354 #ifdef INET
1355                                 case AF_INET:
1356                                         {
1357                                                 struct sockaddr_in *sin,
1358                                                            *rsin;
1359
1360                                                 sin = (struct sockaddr_in *)
1361                                                     &net->ro._l_addr;
1362                                                 rsin = (struct sockaddr_in *)remote;
1363                                                 if (sin->sin_addr.s_addr ==
1364                                                     rsin->sin_addr.s_addr) {
1365                                                         /* found it */
1366                                                         if (netp != NULL) {
1367                                                                 *netp = net;
1368                                                         }
1369                                                         if (locked_tcb == NULL) {
1370                                                                 SCTP_INP_DECR_REF(inp);
1371                                                         } else if (locked_tcb != stcb) {
1372                                                                 SCTP_TCB_LOCK(locked_tcb);
1373                                                         }
1374                                                         if (locked_tcb) {
1375                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1376                                                         }
1377
1378                                                         SCTP_INP_WUNLOCK(inp);
1379                                                         SCTP_INP_INFO_RUNLOCK();
1380                                                         return (stcb);
1381                                                 }
1382                                                 break;
1383                                         }
1384 #endif
1385 #ifdef INET6
1386                                 case AF_INET6:
1387                                         {
1388                                                 struct sockaddr_in6 *sin6,
1389                                                             *rsin6;
1390
1391                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1392                                                 rsin6 = (struct sockaddr_in6 *)remote;
1393                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1394                                                     rsin6)) {
1395                                                         /* found it */
1396                                                         if (netp != NULL) {
1397                                                                 *netp = net;
1398                                                         }
1399                                                         if (locked_tcb == NULL) {
1400                                                                 SCTP_INP_DECR_REF(inp);
1401                                                         } else if (locked_tcb != stcb) {
1402                                                                 SCTP_TCB_LOCK(locked_tcb);
1403                                                         }
1404                                                         if (locked_tcb) {
1405                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1406                                                         }
1407                                                         SCTP_INP_WUNLOCK(inp);
1408                                                         SCTP_INP_INFO_RUNLOCK();
1409                                                         return (stcb);
1410                                                 }
1411                                                 break;
1412                                         }
1413 #endif
1414                                 default:
1415                                         /* TSNH */
1416                                         break;
1417                                 }
1418                         }
1419                         SCTP_TCB_UNLOCK(stcb);
1420                 }
1421         } else {
1422                 SCTP_INP_WLOCK(inp);
1423                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1424                         goto null_return;
1425                 }
1426                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1427                     inp->sctp_hashmark)];
1428                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1429                         if (stcb->rport != rport) {
1430                                 /* remote port does not match */
1431                                 continue;
1432                         }
1433                         SCTP_TCB_LOCK(stcb);
1434                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1435                                 SCTP_TCB_UNLOCK(stcb);
1436                                 continue;
1437                         }
1438                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1439                                 SCTP_TCB_UNLOCK(stcb);
1440                                 continue;
1441                         }
1442                         /* now look at the list of remote addresses */
1443                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1444 #ifdef INVARIANTS
1445                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1446                                         panic("Corrupt net list");
1447                                 }
1448 #endif
1449                                 if (net->ro._l_addr.sa.sa_family !=
1450                                     remote->sa_family) {
1451                                         /* not the same family */
1452                                         continue;
1453                                 }
1454                                 switch (remote->sa_family) {
1455 #ifdef INET
1456                                 case AF_INET:
1457                                         {
1458                                                 struct sockaddr_in *sin,
1459                                                            *rsin;
1460
1461                                                 sin = (struct sockaddr_in *)
1462                                                     &net->ro._l_addr;
1463                                                 rsin = (struct sockaddr_in *)remote;
1464                                                 if (sin->sin_addr.s_addr ==
1465                                                     rsin->sin_addr.s_addr) {
1466                                                         /* found it */
1467                                                         if (netp != NULL) {
1468                                                                 *netp = net;
1469                                                         }
1470                                                         if (locked_tcb == NULL) {
1471                                                                 SCTP_INP_DECR_REF(inp);
1472                                                         } else if (locked_tcb != stcb) {
1473                                                                 SCTP_TCB_LOCK(locked_tcb);
1474                                                         }
1475                                                         if (locked_tcb) {
1476                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1477                                                         }
1478                                                         SCTP_INP_WUNLOCK(inp);
1479                                                         SCTP_INP_INFO_RUNLOCK();
1480                                                         return (stcb);
1481                                                 }
1482                                                 break;
1483                                         }
1484 #endif
1485 #ifdef INET6
1486                                 case AF_INET6:
1487                                         {
1488                                                 struct sockaddr_in6 *sin6,
1489                                                             *rsin6;
1490
1491                                                 sin6 = (struct sockaddr_in6 *)
1492                                                     &net->ro._l_addr;
1493                                                 rsin6 = (struct sockaddr_in6 *)remote;
1494                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1495                                                     rsin6)) {
1496                                                         /* found it */
1497                                                         if (netp != NULL) {
1498                                                                 *netp = net;
1499                                                         }
1500                                                         if (locked_tcb == NULL) {
1501                                                                 SCTP_INP_DECR_REF(inp);
1502                                                         } else if (locked_tcb != stcb) {
1503                                                                 SCTP_TCB_LOCK(locked_tcb);
1504                                                         }
1505                                                         if (locked_tcb) {
1506                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1507                                                         }
1508                                                         SCTP_INP_WUNLOCK(inp);
1509                                                         SCTP_INP_INFO_RUNLOCK();
1510                                                         return (stcb);
1511                                                 }
1512                                                 break;
1513                                         }
1514 #endif
1515                                 default:
1516                                         /* TSNH */
1517                                         break;
1518                                 }
1519                         }
1520                         SCTP_TCB_UNLOCK(stcb);
1521                 }
1522         }
1523 null_return:
1524         /* clean up for returning null */
1525         if (locked_tcb) {
1526                 SCTP_TCB_LOCK(locked_tcb);
1527                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1528         }
1529         SCTP_INP_WUNLOCK(inp);
1530         SCTP_INP_INFO_RUNLOCK();
1531         /* not found */
1532         return (NULL);
1533 }
1534
1535 /*
1536  * Find an association for a specific endpoint using the association id given
1537  * out in the COMM_UP notification
1538  */
1539 struct sctp_tcb *
1540 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1541 {
1542         /*
1543          * Use my the assoc_id to find a endpoint
1544          */
1545         struct sctpasochead *head;
1546         struct sctp_tcb *stcb;
1547         uint32_t id;
1548
1549         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1550                 SCTP_PRINTF("TSNH ep_associd0\n");
1551                 return (NULL);
1552         }
1553         id = (uint32_t)asoc_id;
1554         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1555         if (head == NULL) {
1556                 /* invalid id TSNH */
1557                 SCTP_PRINTF("TSNH ep_associd1\n");
1558                 return (NULL);
1559         }
1560         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1561                 if (stcb->asoc.assoc_id == id) {
1562                         if (inp != stcb->sctp_ep) {
1563                                 /*
1564                                  * some other guy has the same id active (id
1565                                  * collision ??).
1566                                  */
1567                                 SCTP_PRINTF("TSNH ep_associd2\n");
1568                                 continue;
1569                         }
1570                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1571                                 continue;
1572                         }
1573                         if (want_lock) {
1574                                 SCTP_TCB_LOCK(stcb);
1575                         }
1576                         return (stcb);
1577                 }
1578         }
1579         return (NULL);
1580 }
1581
1582 struct sctp_tcb *
1583 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1584 {
1585         struct sctp_tcb *stcb;
1586
1587         SCTP_INP_RLOCK(inp);
1588         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1589         SCTP_INP_RUNLOCK(inp);
1590         return (stcb);
1591 }
1592
1593 /*
1594  * Endpoint probe expects that the INP_INFO is locked.
1595  */
1596 static struct sctp_inpcb *
1597 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1598     uint16_t lport, uint32_t vrf_id)
1599 {
1600         struct sctp_inpcb *inp;
1601         struct sctp_laddr *laddr;
1602 #ifdef INET
1603         struct sockaddr_in *sin;
1604 #endif
1605 #ifdef INET6
1606         struct sockaddr_in6 *sin6;
1607         struct sockaddr_in6 *intf_addr6;
1608 #endif
1609         int fnd;
1610
1611 #ifdef INET
1612         sin = NULL;
1613 #endif
1614 #ifdef INET6
1615         sin6 = NULL;
1616 #endif
1617         switch (nam->sa_family) {
1618 #ifdef INET
1619         case AF_INET:
1620                 sin = (struct sockaddr_in *)nam;
1621                 break;
1622 #endif
1623 #ifdef INET6
1624         case AF_INET6:
1625                 sin6 = (struct sockaddr_in6 *)nam;
1626                 break;
1627 #endif
1628         default:
1629                 /* unsupported family */
1630                 return (NULL);
1631         }
1632
1633         if (head == NULL)
1634                 return (NULL);
1635
1636         LIST_FOREACH(inp, head, sctp_hash) {
1637                 SCTP_INP_RLOCK(inp);
1638                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1639                         SCTP_INP_RUNLOCK(inp);
1640                         continue;
1641                 }
1642                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1643                     (inp->sctp_lport == lport)) {
1644                         /* got it */
1645                         switch (nam->sa_family) {
1646 #ifdef INET
1647                         case AF_INET:
1648                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1649                                     SCTP_IPV6_V6ONLY(inp)) {
1650                                         /*
1651                                          * IPv4 on a IPv6 socket with ONLY
1652                                          * IPv6 set
1653                                          */
1654                                         SCTP_INP_RUNLOCK(inp);
1655                                         continue;
1656                                 }
1657                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1658                                     &sin->sin_addr) != 0) {
1659                                         SCTP_INP_RUNLOCK(inp);
1660                                         continue;
1661                                 }
1662                                 break;
1663 #endif
1664 #ifdef INET6
1665                         case AF_INET6:
1666                                 /*
1667                                  * A V6 address and the endpoint is NOT
1668                                  * bound V6
1669                                  */
1670                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1671                                         SCTP_INP_RUNLOCK(inp);
1672                                         continue;
1673                                 }
1674                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1675                                     &sin6->sin6_addr) != 0) {
1676                                         SCTP_INP_RUNLOCK(inp);
1677                                         continue;
1678                                 }
1679                                 break;
1680 #endif
1681                         default:
1682                                 break;
1683                         }
1684                         /* does a VRF id match? */
1685                         fnd = 0;
1686                         if (inp->def_vrf_id == vrf_id)
1687                                 fnd = 1;
1688
1689                         SCTP_INP_RUNLOCK(inp);
1690                         if (!fnd)
1691                                 continue;
1692                         return (inp);
1693                 }
1694                 SCTP_INP_RUNLOCK(inp);
1695         }
1696         switch (nam->sa_family) {
1697 #ifdef INET
1698         case AF_INET:
1699                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1700                         /* Can't hunt for one that has no address specified */
1701                         return (NULL);
1702                 }
1703                 break;
1704 #endif
1705 #ifdef INET6
1706         case AF_INET6:
1707                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1708                         /* Can't hunt for one that has no address specified */
1709                         return (NULL);
1710                 }
1711                 break;
1712 #endif
1713         default:
1714                 break;
1715         }
1716         /*
1717          * ok, not bound to all so see if we can find a EP bound to this
1718          * address.
1719          */
1720         LIST_FOREACH(inp, head, sctp_hash) {
1721                 SCTP_INP_RLOCK(inp);
1722                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1723                         SCTP_INP_RUNLOCK(inp);
1724                         continue;
1725                 }
1726                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1727                         SCTP_INP_RUNLOCK(inp);
1728                         continue;
1729                 }
1730                 /*
1731                  * Ok this could be a likely candidate, look at all of its
1732                  * addresses
1733                  */
1734                 if (inp->sctp_lport != lport) {
1735                         SCTP_INP_RUNLOCK(inp);
1736                         continue;
1737                 }
1738                 /* does a VRF id match? */
1739                 fnd = 0;
1740                 if (inp->def_vrf_id == vrf_id)
1741                         fnd = 1;
1742
1743                 if (!fnd) {
1744                         SCTP_INP_RUNLOCK(inp);
1745                         continue;
1746                 }
1747                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1748                         if (laddr->ifa == NULL) {
1749                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1750                                     __func__);
1751                                 continue;
1752                         }
1753                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1754                             (void *)laddr->ifa);
1755                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1756                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1757                                 continue;
1758                         }
1759                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1760                                 /* possible, see if it matches */
1761                                 switch (nam->sa_family) {
1762 #ifdef INET
1763                                 case AF_INET:
1764                                         if (sin->sin_addr.s_addr ==
1765                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1766                                                 SCTP_INP_RUNLOCK(inp);
1767                                                 return (inp);
1768                                         }
1769                                         break;
1770 #endif
1771 #ifdef INET6
1772                                 case AF_INET6:
1773                                         intf_addr6 = &laddr->ifa->address.sin6;
1774                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1775                                             intf_addr6)) {
1776                                                 SCTP_INP_RUNLOCK(inp);
1777                                                 return (inp);
1778                                         }
1779                                         break;
1780 #endif
1781                                 }
1782                         }
1783                 }
1784                 SCTP_INP_RUNLOCK(inp);
1785         }
1786         return (NULL);
1787 }
1788
1789 static struct sctp_inpcb *
1790 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1791 {
1792         struct sctppcbhead *head;
1793         struct sctp_inpcb *t_inp;
1794         int fnd;
1795
1796         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1797             SCTP_BASE_INFO(hashmark))];
1798         LIST_FOREACH(t_inp, head, sctp_hash) {
1799                 if (t_inp->sctp_lport != lport) {
1800                         continue;
1801                 }
1802                 /* is it in the VRF in question */
1803                 fnd = 0;
1804                 if (t_inp->def_vrf_id == vrf_id)
1805                         fnd = 1;
1806                 if (!fnd)
1807                         continue;
1808
1809                 /* This one is in use. */
1810                 /* check the v6/v4 binding issue */
1811                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1812                     SCTP_IPV6_V6ONLY(t_inp)) {
1813                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1814                                 /* collision in V6 space */
1815                                 return (t_inp);
1816                         } else {
1817                                 /* inp is BOUND_V4 no conflict */
1818                                 continue;
1819                         }
1820                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1821                         /* t_inp is bound v4 and v6, conflict always */
1822                         return (t_inp);
1823                 } else {
1824                         /* t_inp is bound only V4 */
1825                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1826                             SCTP_IPV6_V6ONLY(inp)) {
1827                                 /* no conflict */
1828                                 continue;
1829                         }
1830                         /* else fall through to conflict */
1831                 }
1832                 return (t_inp);
1833         }
1834         return (NULL);
1835 }
1836
1837 int
1838 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1839 {
1840         /* For 1-2-1 with port reuse */
1841         struct sctppcbhead *head;
1842         struct sctp_inpcb *tinp, *ninp;
1843
1844         SCTP_INP_INFO_WLOCK_ASSERT();
1845         SCTP_INP_WLOCK_ASSERT(inp);
1846
1847         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1848                 /* only works with port reuse on */
1849                 return (-1);
1850         }
1851         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1852                 return (0);
1853         }
1854         SCTP_INP_WUNLOCK(inp);
1855         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1856             SCTP_BASE_INFO(hashmark))];
1857         /* Kick out all non-listeners to the TCP hash */
1858         LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1859                 if (tinp->sctp_lport != inp->sctp_lport) {
1860                         continue;
1861                 }
1862                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1863                         continue;
1864                 }
1865                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1866                         continue;
1867                 }
1868                 if (SCTP_IS_LISTENING(tinp)) {
1869                         continue;
1870                 }
1871                 SCTP_INP_WLOCK(tinp);
1872                 LIST_REMOVE(tinp, sctp_hash);
1873                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1874                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1875                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1876                 SCTP_INP_WUNLOCK(tinp);
1877         }
1878         SCTP_INP_WLOCK(inp);
1879         /* Pull from where he was */
1880         LIST_REMOVE(inp, sctp_hash);
1881         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1882         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1883         LIST_INSERT_HEAD(head, inp, sctp_hash);
1884         return (0);
1885 }
1886
1887 struct sctp_inpcb *
1888 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1889     uint32_t vrf_id)
1890 {
1891         /*
1892          * First we check the hash table to see if someone has this port
1893          * bound with just the port.
1894          */
1895         struct sctp_inpcb *inp;
1896         struct sctppcbhead *head;
1897         int lport;
1898         unsigned int i;
1899 #ifdef INET
1900         struct sockaddr_in *sin;
1901 #endif
1902 #ifdef INET6
1903         struct sockaddr_in6 *sin6;
1904 #endif
1905
1906         switch (nam->sa_family) {
1907 #ifdef INET
1908         case AF_INET:
1909                 sin = (struct sockaddr_in *)nam;
1910                 lport = sin->sin_port;
1911                 break;
1912 #endif
1913 #ifdef INET6
1914         case AF_INET6:
1915                 sin6 = (struct sockaddr_in6 *)nam;
1916                 lport = sin6->sin6_port;
1917                 break;
1918 #endif
1919         default:
1920                 return (NULL);
1921         }
1922         /*
1923          * I could cheat here and just cast to one of the types but we will
1924          * do it right. It also provides the check against an Unsupported
1925          * type too.
1926          */
1927         /* Find the head of the ALLADDR chain */
1928         if (have_lock == 0) {
1929                 SCTP_INP_INFO_RLOCK();
1930         }
1931         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1932             SCTP_BASE_INFO(hashmark))];
1933         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1934
1935         /*
1936          * If the TCP model exists it could be that the main listening
1937          * endpoint is gone but there still exists a connected socket for
1938          * this guy. If so we can return the first one that we find. This
1939          * may NOT be the correct one so the caller should be wary on the
1940          * returned INP. Currently the only caller that sets find_tcp_pool
1941          * is in bindx where we are verifying that a user CAN bind the
1942          * address. He either has bound it already, or someone else has, or
1943          * its open to bind, so this is good enough.
1944          */
1945         if (inp == NULL && find_tcp_pool) {
1946                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1947                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1948                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1949                         if (inp) {
1950                                 break;
1951                         }
1952                 }
1953         }
1954         if (inp) {
1955                 SCTP_INP_INCR_REF(inp);
1956         }
1957         if (have_lock == 0) {
1958                 SCTP_INP_INFO_RUNLOCK();
1959         }
1960         return (inp);
1961 }
1962
1963 /*
1964  * Find an association for an endpoint with the pointer to whom you want to
1965  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1966  * need to change the *to to some other struct like a mbuf...
1967  */
1968 struct sctp_tcb *
1969 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
1970     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1971     uint32_t vrf_id)
1972 {
1973         struct sctp_inpcb *inp = NULL;
1974         struct sctp_tcb *stcb;
1975
1976         SCTP_INP_INFO_RLOCK();
1977         if (find_tcp_pool) {
1978                 if (inp_p != NULL) {
1979                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
1980                             vrf_id);
1981                 } else {
1982                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
1983                             vrf_id);
1984                 }
1985                 if (stcb != NULL) {
1986                         SCTP_INP_INFO_RUNLOCK();
1987                         return (stcb);
1988                 }
1989         }
1990         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1991         if (inp_p != NULL) {
1992                 *inp_p = inp;
1993         }
1994         SCTP_INP_INFO_RUNLOCK();
1995         if (inp == NULL) {
1996                 return (NULL);
1997         }
1998         /*
1999          * ok, we have an endpoint, now lets find the assoc for it (if any)
2000          * we now place the source address or from in the to of the find
2001          * endpoint call. Since in reality this chain is used from the
2002          * inbound packet side.
2003          */
2004         if (inp_p != NULL) {
2005                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2006                     NULL);
2007         } else {
2008                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2009                     NULL);
2010         }
2011         return (stcb);
2012 }
2013
2014 /*
2015  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2016  * find all addresses that the sender has specified in any address list. Each
2017  * address will be used to lookup the TCB and see if one exits.
2018  */
2019 static struct sctp_tcb *
2020 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2021     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2022     struct sockaddr *dst)
2023 {
2024         struct sctp_paramhdr *phdr, param_buf;
2025 #if defined(INET) || defined(INET6)
2026         struct sctp_tcb *stcb;
2027         uint16_t ptype;
2028 #endif
2029         uint16_t plen;
2030 #ifdef INET
2031         struct sockaddr_in sin4;
2032 #endif
2033 #ifdef INET6
2034         struct sockaddr_in6 sin6;
2035 #endif
2036
2037 #ifdef INET
2038         memset(&sin4, 0, sizeof(sin4));
2039         sin4.sin_len = sizeof(sin4);
2040         sin4.sin_family = AF_INET;
2041         sin4.sin_port = sh->src_port;
2042 #endif
2043 #ifdef INET6
2044         memset(&sin6, 0, sizeof(sin6));
2045         sin6.sin6_len = sizeof(sin6);
2046         sin6.sin6_family = AF_INET6;
2047         sin6.sin6_port = sh->src_port;
2048 #endif
2049
2050         offset += sizeof(struct sctp_init_chunk);
2051
2052         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
2053         while (phdr != NULL) {
2054                 /* now we must see if we want the parameter */
2055 #if defined(INET) || defined(INET6)
2056                 ptype = ntohs(phdr->param_type);
2057 #endif
2058                 plen = ntohs(phdr->param_length);
2059                 if (plen == 0) {
2060                         break;
2061                 }
2062 #ifdef INET
2063                 if (ptype == SCTP_IPV4_ADDRESS &&
2064                     plen == sizeof(struct sctp_ipv4addr_param)) {
2065                         /* Get the rest of the address */
2066                         struct sctp_ipv4addr_param ip4_param, *p4;
2067
2068                         phdr = sctp_get_next_param(m, offset,
2069                             (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param));
2070                         if (phdr == NULL) {
2071                                 return (NULL);
2072                         }
2073                         p4 = (struct sctp_ipv4addr_param *)phdr;
2074                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2075                         /* look it up */
2076                         stcb = sctp_findassociation_ep_addr(inp_p,
2077                             (struct sockaddr *)&sin4, netp, dst, NULL);
2078                         if (stcb != NULL) {
2079                                 return (stcb);
2080                         }
2081                 }
2082 #endif
2083 #ifdef INET6
2084                 if (ptype == SCTP_IPV6_ADDRESS &&
2085                     plen == sizeof(struct sctp_ipv6addr_param)) {
2086                         /* Get the rest of the address */
2087                         struct sctp_ipv6addr_param ip6_param, *p6;
2088
2089                         phdr = sctp_get_next_param(m, offset,
2090                             (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param));
2091                         if (phdr == NULL) {
2092                                 return (NULL);
2093                         }
2094                         p6 = (struct sctp_ipv6addr_param *)phdr;
2095                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2096                         /* look it up */
2097                         stcb = sctp_findassociation_ep_addr(inp_p,
2098                             (struct sockaddr *)&sin6, netp, dst, NULL);
2099                         if (stcb != NULL) {
2100                                 return (stcb);
2101                         }
2102                 }
2103 #endif
2104                 offset += SCTP_SIZE32(plen);
2105                 phdr = sctp_get_next_param(m, offset, &param_buf,
2106                     sizeof(param_buf));
2107         }
2108         return (NULL);
2109 }
2110
2111 static struct sctp_tcb *
2112 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2113     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2114     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2115 {
2116         /*
2117          * Use my vtag to hash. If we find it we then verify the source addr
2118          * is in the assoc. If all goes well we save a bit on rec of a
2119          * packet.
2120          */
2121         struct sctpasochead *head;
2122         struct sctp_nets *net;
2123         struct sctp_tcb *stcb;
2124
2125         SCTP_INP_INFO_RLOCK();
2126         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2127             SCTP_BASE_INFO(hashasocmark))];
2128         LIST_FOREACH(stcb, head, sctp_asocs) {
2129                 SCTP_INP_RLOCK(stcb->sctp_ep);
2130                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2131                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2132                         continue;
2133                 }
2134                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2135                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2136                         continue;
2137                 }
2138                 SCTP_TCB_LOCK(stcb);
2139                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2140                 if (stcb->asoc.my_vtag == vtag) {
2141                         /* candidate */
2142                         if (stcb->rport != rport) {
2143                                 SCTP_TCB_UNLOCK(stcb);
2144                                 continue;
2145                         }
2146                         if (stcb->sctp_ep->sctp_lport != lport) {
2147                                 SCTP_TCB_UNLOCK(stcb);
2148                                 continue;
2149                         }
2150                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2151                                 SCTP_TCB_UNLOCK(stcb);
2152                                 continue;
2153                         }
2154                         /* RRS:Need toaddr check here */
2155                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2156                                 /* Endpoint does not own this address */
2157                                 SCTP_TCB_UNLOCK(stcb);
2158                                 continue;
2159                         }
2160                         if (remote_tag) {
2161                                 /*
2162                                  * If we have both vtags that's all we match
2163                                  * on
2164                                  */
2165                                 if (stcb->asoc.peer_vtag == remote_tag) {
2166                                         /*
2167                                          * If both tags match we consider it
2168                                          * conclusive and check NO
2169                                          * source/destination addresses
2170                                          */
2171                                         goto conclusive;
2172                                 }
2173                         }
2174                         if (skip_src_check) {
2175                 conclusive:
2176                                 if (from) {
2177                                         *netp = sctp_findnet(stcb, from);
2178                                 } else {
2179                                         *netp = NULL;   /* unknown */
2180                                 }
2181                                 if (inp_p)
2182                                         *inp_p = stcb->sctp_ep;
2183                                 SCTP_INP_INFO_RUNLOCK();
2184                                 return (stcb);
2185                         }
2186                         net = sctp_findnet(stcb, from);
2187                         if (net) {
2188                                 /* yep its him. */
2189                                 *netp = net;
2190                                 SCTP_STAT_INCR(sctps_vtagexpress);
2191                                 *inp_p = stcb->sctp_ep;
2192                                 SCTP_INP_INFO_RUNLOCK();
2193                                 return (stcb);
2194                         } else {
2195                                 /*
2196                                  * not him, this should only happen in rare
2197                                  * cases so I peg it.
2198                                  */
2199                                 SCTP_STAT_INCR(sctps_vtagbogus);
2200                         }
2201                 }
2202                 SCTP_TCB_UNLOCK(stcb);
2203         }
2204         SCTP_INP_INFO_RUNLOCK();
2205         return (NULL);
2206 }
2207
2208 /*
2209  * Find an association with the pointer to the inbound IP packet. This can be
2210  * a IPv4 or IPv6 packet.
2211  */
2212 struct sctp_tcb *
2213 sctp_findassociation_addr(struct mbuf *m, int offset,
2214     struct sockaddr *src, struct sockaddr *dst,
2215     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2216     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2217 {
2218         struct sctp_tcb *stcb;
2219         struct sctp_inpcb *inp;
2220
2221         if (sh->v_tag) {
2222                 /* we only go down this path if vtag is non-zero */
2223                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2224                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2225                 if (stcb) {
2226                         return (stcb);
2227                 }
2228         }
2229
2230         if (inp_p) {
2231                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2232                     1, vrf_id);
2233                 inp = *inp_p;
2234         } else {
2235                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2236                     1, vrf_id);
2237         }
2238         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2239         if (stcb == NULL && inp) {
2240                 /* Found a EP but not this address */
2241                 if ((ch->chunk_type == SCTP_INITIATION) ||
2242                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2243                         /*-
2244                          * special hook, we do NOT return linp or an
2245                          * association that is linked to an existing
2246                          * association that is under the TCP pool (i.e. no
2247                          * listener exists). The endpoint finding routine
2248                          * will always find a listener before examining the
2249                          * TCP pool.
2250                          */
2251                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2252                                 if (inp_p) {
2253                                         *inp_p = NULL;
2254                                 }
2255                                 return (NULL);
2256                         }
2257                         stcb = sctp_findassociation_special_addr(m,
2258                             offset, sh, &inp, netp, dst);
2259                         if (inp_p != NULL) {
2260                                 *inp_p = inp;
2261                         }
2262                 }
2263         }
2264         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2265         return (stcb);
2266 }
2267
2268 /*
2269  * lookup an association by an ASCONF lookup address.
2270  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2271  */
2272 struct sctp_tcb *
2273 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2274     struct sockaddr *dst, struct sctphdr *sh,
2275     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2276 {
2277         struct sctp_tcb *stcb;
2278         union sctp_sockstore remote_store;
2279         struct sctp_paramhdr param_buf, *phdr;
2280         int ptype;
2281         int zero_address = 0;
2282 #ifdef INET
2283         struct sockaddr_in *sin;
2284 #endif
2285 #ifdef INET6
2286         struct sockaddr_in6 *sin6;
2287 #endif
2288
2289         memset(&remote_store, 0, sizeof(remote_store));
2290         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2291             &param_buf, sizeof(struct sctp_paramhdr));
2292         if (phdr == NULL) {
2293                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2294                     __func__);
2295                 return NULL;
2296         }
2297         ptype = (int)((uint32_t)ntohs(phdr->param_type));
2298         /* get the correlation address */
2299         switch (ptype) {
2300 #ifdef INET6
2301         case SCTP_IPV6_ADDRESS:
2302                 {
2303                         /* ipv6 address param */
2304                         struct sctp_ipv6addr_param *p6, p6_buf;
2305
2306                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2307                                 return NULL;
2308                         }
2309                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2310                             offset + sizeof(struct sctp_asconf_chunk),
2311                             &p6_buf.ph, sizeof(p6_buf));
2312                         if (p6 == NULL) {
2313                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2314                                     __func__);
2315                                 return (NULL);
2316                         }
2317                         sin6 = &remote_store.sin6;
2318                         sin6->sin6_family = AF_INET6;
2319                         sin6->sin6_len = sizeof(*sin6);
2320                         sin6->sin6_port = sh->src_port;
2321                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2322                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2323                                 zero_address = 1;
2324                         break;
2325                 }
2326 #endif
2327 #ifdef INET
2328         case SCTP_IPV4_ADDRESS:
2329                 {
2330                         /* ipv4 address param */
2331                         struct sctp_ipv4addr_param *p4, p4_buf;
2332
2333                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2334                                 return NULL;
2335                         }
2336                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2337                             offset + sizeof(struct sctp_asconf_chunk),
2338                             &p4_buf.ph, sizeof(p4_buf));
2339                         if (p4 == NULL) {
2340                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2341                                     __func__);
2342                                 return (NULL);
2343                         }
2344                         sin = &remote_store.sin;
2345                         sin->sin_family = AF_INET;
2346                         sin->sin_len = sizeof(*sin);
2347                         sin->sin_port = sh->src_port;
2348                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2349                         if (sin->sin_addr.s_addr == INADDR_ANY)
2350                                 zero_address = 1;
2351                         break;
2352                 }
2353 #endif
2354         default:
2355                 /* invalid address param type */
2356                 return NULL;
2357         }
2358
2359         if (zero_address) {
2360                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2361                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2362                 if (stcb != NULL) {
2363                         SCTP_INP_DECR_REF(*inp_p);
2364                 }
2365         } else {
2366                 stcb = sctp_findassociation_ep_addr(inp_p,
2367                     &remote_store.sa, netp,
2368                     dst, NULL);
2369         }
2370         return (stcb);
2371 }
2372
2373 /*
2374  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2375  * addresses. This way if we don't get a bind we by default pick a ephemeral
2376  * port with all addresses bound.
2377  */
2378 int
2379 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2380 {
2381         /*
2382          * we get called when a new endpoint starts up. We need to allocate
2383          * the sctp_inpcb structure from the zone and init it. Mark it as
2384          * unbound and find a port that we can use as an ephemeral with
2385          * INADDR_ANY. If the user binds later no problem we can then add in
2386          * the specific addresses. And setup the default parameters for the
2387          * EP.
2388          */
2389         int i, error;
2390         struct sctp_inpcb *inp;
2391         struct sctp_pcb *m;
2392         struct timeval time;
2393         sctp_sharedkey_t *null_key;
2394
2395         error = 0;
2396
2397         SCTP_INP_INFO_WLOCK();
2398         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2399         if (inp == NULL) {
2400                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2401                 SCTP_INP_INFO_WUNLOCK();
2402                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2403                 return (ENOBUFS);
2404         }
2405         /* zap it */
2406         memset(inp, 0, sizeof(*inp));
2407
2408         /* bump generations */
2409         /* setup socket pointers */
2410         inp->sctp_socket = so;
2411         inp->ip_inp.inp.inp_socket = so;
2412         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2413 #ifdef INET6
2414         if (INP_SOCKAF(so) == AF_INET6) {
2415                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2416                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2417                 }
2418                 if (MODULE_GLOBAL(ip6_v6only)) {
2419                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2420                 }
2421         }
2422 #endif
2423         inp->sctp_associd_counter = 1;
2424         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2425         inp->sctp_frag_point = 0;
2426         inp->max_cwnd = 0;
2427         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2428         inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable);
2429         inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable);
2430         inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable);
2431         inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable);
2432         inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2433         inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2434         inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2435         inp->idata_supported = 0;
2436
2437         inp->fibnum = so->so_fibnum;
2438         /* init the small hash table we use to track asocid <-> tcb */
2439         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2440         if (inp->sctp_asocidhash == NULL) {
2441                 crfree(inp->ip_inp.inp.inp_cred);
2442                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2443                 SCTP_INP_INFO_WUNLOCK();
2444                 return (ENOBUFS);
2445         }
2446         SCTP_INCR_EP_COUNT();
2447         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2448         SCTP_INP_INFO_WUNLOCK();
2449
2450         so->so_pcb = (caddr_t)inp;
2451
2452         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2453                 /* UDP style socket */
2454                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2455                     SCTP_PCB_FLAGS_UNBOUND);
2456                 /* Be sure it is NON-BLOCKING IO for UDP */
2457                 /* SCTP_SET_SO_NBIO(so); */
2458         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2459                 /* TCP style socket */
2460                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2461                     SCTP_PCB_FLAGS_UNBOUND);
2462                 /* Be sure we have blocking IO by default */
2463                 SOCK_LOCK(so);
2464                 SCTP_CLEAR_SO_NBIO(so);
2465                 SOCK_UNLOCK(so);
2466         } else {
2467                 /*
2468                  * unsupported socket type (RAW, etc)- in case we missed it
2469                  * in protosw
2470                  */
2471                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2472                 so->so_pcb = NULL;
2473                 crfree(inp->ip_inp.inp.inp_cred);
2474                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2475                 return (EOPNOTSUPP);
2476         }
2477         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2478                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2479                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2480         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2481                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2482                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2483         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2484                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2485                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2486         }
2487         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2488             &inp->sctp_hashmark);
2489         if (inp->sctp_tcbhash == NULL) {
2490                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2491                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2492                 so->so_pcb = NULL;
2493                 crfree(inp->ip_inp.inp.inp_cred);
2494                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2495                 return (ENOBUFS);
2496         }
2497         inp->def_vrf_id = vrf_id;
2498
2499         SCTP_INP_INFO_WLOCK();
2500         SCTP_INP_LOCK_INIT(inp);
2501         rw_init_flags(&inp->ip_inp.inp.inp_lock, "sctpinp",
2502             RW_RECURSE | RW_DUPOK);
2503         SCTP_INP_READ_INIT(inp);
2504         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2505         /* lock the new ep */
2506         SCTP_INP_WLOCK(inp);
2507
2508         /* add it to the info area */
2509         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2510         SCTP_INP_INFO_WUNLOCK();
2511
2512         TAILQ_INIT(&inp->read_queue);
2513         LIST_INIT(&inp->sctp_addr_list);
2514
2515         LIST_INIT(&inp->sctp_asoc_list);
2516
2517 #ifdef SCTP_TRACK_FREED_ASOCS
2518         /* TEMP CODE */
2519         LIST_INIT(&inp->sctp_asoc_free_list);
2520 #endif
2521         /* Init the timer structure for signature change */
2522         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2523         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2524
2525         /* now init the actual endpoint default data */
2526         m = &inp->sctp_ep;
2527
2528         /* setup the base timeout information */
2529         m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC);      /* needed ? */
2530         m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC);      /* needed ? */
2531         m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2532         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2533         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2534         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2535         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2536         /* all max/min max are in ms */
2537         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2538         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2539         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2540         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2541         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2542         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2543         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2544         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2545         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2546         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2547         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2548         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2549         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2550
2551         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2552         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2553         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2554         /* number of streams to pre-open on a association */
2555         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2556
2557         m->default_mtu = 0;
2558         /* Add adaptation cookie */
2559         m->adaptation_layer_indicator = 0;
2560         m->adaptation_layer_indicator_provided = 0;
2561
2562         /* seed random number generator */
2563         m->random_counter = 1;
2564         m->store_at = SCTP_SIGNATURE_SIZE;
2565         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2566         sctp_fill_random_store(m);
2567
2568         /* Minimum cookie size */
2569         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2570             sizeof(struct sctp_state_cookie);
2571         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2572
2573         /* Setup the initial secret */
2574         (void)SCTP_GETTIME_TIMEVAL(&time);
2575         m->time_of_secret_change = (unsigned int)time.tv_sec;
2576
2577         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2578                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2579         }
2580         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2581
2582         /* How long is a cookie good for ? */
2583         m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2584         /*
2585          * Initialize authentication parameters
2586          */
2587         m->local_hmacs = sctp_default_supported_hmaclist();
2588         m->local_auth_chunks = sctp_alloc_chunklist();
2589         if (inp->asconf_supported) {
2590                 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2591                 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2592         }
2593         m->default_dscp = 0;
2594 #ifdef INET6
2595         m->default_flowlabel = 0;
2596 #endif
2597         m->port = 0;            /* encapsulation disabled by default */
2598         LIST_INIT(&m->shared_keys);
2599         /* add default NULL key as key id 0 */
2600         null_key = sctp_alloc_sharedkey();
2601         sctp_insert_sharedkey(&m->shared_keys, null_key);
2602         SCTP_INP_WUNLOCK(inp);
2603 #ifdef SCTP_LOG_CLOSING
2604         sctp_log_closing(inp, NULL, 12);
2605 #endif
2606         return (error);
2607 }
2608
2609 void
2610 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2611     struct sctp_tcb *stcb)
2612 {
2613         struct sctp_nets *net;
2614         uint16_t lport, rport;
2615         struct sctppcbhead *head;
2616         struct sctp_laddr *laddr, *oladdr;
2617
2618         atomic_add_int(&stcb->asoc.refcnt, 1);
2619         SCTP_TCB_UNLOCK(stcb);
2620         SCTP_INP_INFO_WLOCK();
2621         SCTP_INP_WLOCK(old_inp);
2622         SCTP_INP_WLOCK(new_inp);
2623         SCTP_TCB_LOCK(stcb);
2624         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2625
2626 #ifdef INET6
2627         if (old_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2628                 new_inp->ip_inp.inp.inp_flags |= old_inp->ip_inp.inp.inp_flags & INP_CONTROLOPTS;
2629                 if (old_inp->ip_inp.inp.in6p_outputopts) {
2630                         new_inp->ip_inp.inp.in6p_outputopts = ip6_copypktopts(old_inp->ip_inp.inp.in6p_outputopts, M_NOWAIT);
2631                 }
2632         }
2633 #endif
2634 #if defined(INET) && defined(INET6)
2635         else
2636 #endif
2637 #ifdef INET
2638         {
2639                 new_inp->ip_inp.inp.inp_ip_tos = old_inp->ip_inp.inp.inp_ip_tos;
2640                 new_inp->ip_inp.inp.inp_ip_ttl = old_inp->ip_inp.inp.inp_ip_ttl;
2641         }
2642 #endif
2643         new_inp->sctp_ep.time_of_secret_change =
2644             old_inp->sctp_ep.time_of_secret_change;
2645         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2646             sizeof(old_inp->sctp_ep.secret_key));
2647         new_inp->sctp_ep.current_secret_number =
2648             old_inp->sctp_ep.current_secret_number;
2649         new_inp->sctp_ep.last_secret_number =
2650             old_inp->sctp_ep.last_secret_number;
2651         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2652
2653         /* make it so new data pours into the new socket */
2654         stcb->sctp_socket = new_inp->sctp_socket;
2655         stcb->sctp_ep = new_inp;
2656
2657         /* Copy the port across */
2658         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2659         rport = stcb->rport;
2660         /* Pull the tcb from the old association */
2661         LIST_REMOVE(stcb, sctp_tcbhash);
2662         LIST_REMOVE(stcb, sctp_tcblist);
2663         if (stcb->asoc.in_asocid_hash) {
2664                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2665         }
2666         /* Now insert the new_inp into the TCP connected hash */
2667         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2668
2669         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2670         /* Its safe to access */
2671         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2672
2673         /* Now move the tcb into the endpoint list */
2674         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2675         /*
2676          * Question, do we even need to worry about the ep-hash since we
2677          * only have one connection? Probably not :> so lets get rid of it
2678          * and not suck up any kernel memory in that.
2679          */
2680         if (stcb->asoc.in_asocid_hash) {
2681                 struct sctpasochead *lhd;
2682
2683                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2684                     new_inp->hashasocidmark)];
2685                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2686         }
2687         /* Ok. Let's restart timer. */
2688         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2689                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2690                     stcb, net);
2691         }
2692
2693         SCTP_INP_INFO_WUNLOCK();
2694         if (new_inp->sctp_tcbhash != NULL) {
2695                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2696                 new_inp->sctp_tcbhash = NULL;
2697         }
2698         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2699                 /* Subset bound, so copy in the laddr list from the old_inp */
2700                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2701                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2702                         if (laddr == NULL) {
2703                                 /*
2704                                  * Gak, what can we do? This assoc is really
2705                                  * HOSED. We probably should send an abort
2706                                  * here.
2707                                  */
2708                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2709                                 continue;
2710                         }
2711                         SCTP_INCR_LADDR_COUNT();
2712                         memset(laddr, 0, sizeof(*laddr));
2713                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2714                         laddr->ifa = oladdr->ifa;
2715                         atomic_add_int(&laddr->ifa->refcount, 1);
2716                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2717                             sctp_nxt_addr);
2718                         new_inp->laddr_count++;
2719                         if (oladdr == stcb->asoc.last_used_address) {
2720                                 stcb->asoc.last_used_address = laddr;
2721                         }
2722                 }
2723         }
2724         /* Now any running timers need to be adjusted. */
2725         if (stcb->asoc.dack_timer.ep == old_inp) {
2726                 SCTP_INP_DECR_REF(old_inp);
2727                 stcb->asoc.dack_timer.ep = new_inp;
2728                 SCTP_INP_INCR_REF(new_inp);
2729         }
2730         if (stcb->asoc.asconf_timer.ep == old_inp) {
2731                 SCTP_INP_DECR_REF(old_inp);
2732                 stcb->asoc.asconf_timer.ep = new_inp;
2733                 SCTP_INP_INCR_REF(new_inp);
2734         }
2735         if (stcb->asoc.strreset_timer.ep == old_inp) {
2736                 SCTP_INP_DECR_REF(old_inp);
2737                 stcb->asoc.strreset_timer.ep = new_inp;
2738                 SCTP_INP_INCR_REF(new_inp);
2739         }
2740         if (stcb->asoc.shut_guard_timer.ep == old_inp) {
2741                 SCTP_INP_DECR_REF(old_inp);
2742                 stcb->asoc.shut_guard_timer.ep = new_inp;
2743                 SCTP_INP_INCR_REF(new_inp);
2744         }
2745         if (stcb->asoc.autoclose_timer.ep == old_inp) {
2746                 SCTP_INP_DECR_REF(old_inp);
2747                 stcb->asoc.autoclose_timer.ep = new_inp;
2748                 SCTP_INP_INCR_REF(new_inp);
2749         }
2750         if (stcb->asoc.delete_prim_timer.ep == old_inp) {
2751                 SCTP_INP_DECR_REF(old_inp);
2752                 stcb->asoc.delete_prim_timer.ep = new_inp;
2753                 SCTP_INP_INCR_REF(new_inp);
2754         }
2755         /* now what about the nets? */
2756         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2757                 if (net->pmtu_timer.ep == old_inp) {
2758                         SCTP_INP_DECR_REF(old_inp);
2759                         net->pmtu_timer.ep = new_inp;
2760                         SCTP_INP_INCR_REF(new_inp);
2761                 }
2762                 if (net->hb_timer.ep == old_inp) {
2763                         SCTP_INP_DECR_REF(old_inp);
2764                         net->hb_timer.ep = new_inp;
2765                         SCTP_INP_INCR_REF(new_inp);
2766                 }
2767                 if (net->rxt_timer.ep == old_inp) {
2768                         SCTP_INP_DECR_REF(old_inp);
2769                         net->rxt_timer.ep = new_inp;
2770                         SCTP_INP_INCR_REF(new_inp);
2771                 }
2772         }
2773         SCTP_INP_WUNLOCK(new_inp);
2774         SCTP_INP_WUNLOCK(old_inp);
2775 }
2776
2777 /*
2778  * insert an laddr entry with the given ifa for the desired list
2779  */
2780 static int
2781 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2782 {
2783         struct sctp_laddr *laddr;
2784
2785         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2786         if (laddr == NULL) {
2787                 /* out of memory? */
2788                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2789                 return (EINVAL);
2790         }
2791         SCTP_INCR_LADDR_COUNT();
2792         memset(laddr, 0, sizeof(*laddr));
2793         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2794         laddr->ifa = ifa;
2795         laddr->action = act;
2796         atomic_add_int(&ifa->refcount, 1);
2797         /* insert it */
2798         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2799
2800         return (0);
2801 }
2802
2803 /*
2804  * Remove an laddr entry from the local address list (on an assoc)
2805  */
2806 static void
2807 sctp_remove_laddr(struct sctp_laddr *laddr)
2808 {
2809
2810         /* remove from the list */
2811         LIST_REMOVE(laddr, sctp_nxt_addr);
2812         sctp_free_ifa(laddr->ifa);
2813         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2814         SCTP_DECR_LADDR_COUNT();
2815 }
2816
2817 /*
2818  * Bind the socket, with the PCB and global info locks held.  Note, if a
2819  * socket address is specified, the PCB lock may be dropped and re-acquired.
2820  *
2821  * sctp_ifap is used to bypass normal local address validation checks.
2822  */
2823 int
2824 sctp_inpcb_bind_locked(struct sctp_inpcb *inp, struct sockaddr *addr,
2825     struct sctp_ifa *sctp_ifap, struct thread *td)
2826 {
2827         /* bind a ep to a socket address */
2828         struct sctppcbhead *head;
2829         struct sctp_inpcb *inp_tmp;
2830         struct inpcb *ip_inp;
2831         int port_reuse_active = 0;
2832         int bindall;
2833         uint16_t lport;
2834         int error;
2835         uint32_t vrf_id;
2836
2837         KASSERT(td != NULL, ("%s: null thread", __func__));
2838
2839         error = 0;
2840         lport = 0;
2841         bindall = 1;
2842         ip_inp = &inp->ip_inp.inp;
2843
2844         SCTP_INP_INFO_WLOCK_ASSERT();
2845         SCTP_INP_WLOCK_ASSERT(inp);
2846
2847 #ifdef SCTP_DEBUG
2848         if (addr) {
2849                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2850                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2851                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2852                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2853         }
2854 #endif
2855         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2856                 error = EINVAL;
2857                 /* already did a bind, subsequent binds NOT allowed ! */
2858                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2859                 goto out;
2860         }
2861         if (addr != NULL) {
2862                 switch (addr->sa_family) {
2863 #ifdef INET
2864                 case AF_INET:
2865                         {
2866                                 struct sockaddr_in *sin;
2867
2868                                 /* IPV6_V6ONLY socket? */
2869                                 if (SCTP_IPV6_V6ONLY(inp)) {
2870                                         error = EINVAL;
2871                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2872                                         goto out;
2873                                 }
2874                                 if (addr->sa_len != sizeof(*sin)) {
2875                                         error = EINVAL;
2876                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2877                                         goto out;
2878                                 }
2879
2880                                 sin = (struct sockaddr_in *)addr;
2881                                 lport = sin->sin_port;
2882                                 /*
2883                                  * For LOOPBACK the prison_local_ip4() call
2884                                  * will transmute the ip address to the
2885                                  * proper value.
2886                                  */
2887                                 if ((error = prison_local_ip4(td->td_ucred, &sin->sin_addr)) != 0) {
2888                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2889                                         goto out;
2890                                 }
2891                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2892                                         bindall = 0;
2893                                 }
2894                                 break;
2895                         }
2896 #endif
2897 #ifdef INET6
2898                 case AF_INET6:
2899                         {
2900                                 /*
2901                                  * Only for pure IPv6 Address. (No IPv4
2902                                  * Mapped!)
2903                                  */
2904                                 struct sockaddr_in6 *sin6;
2905
2906                                 sin6 = (struct sockaddr_in6 *)addr;
2907                                 if (addr->sa_len != sizeof(*sin6)) {
2908                                         error = EINVAL;
2909                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2910                                         goto out;
2911                                 }
2912                                 lport = sin6->sin6_port;
2913                                 /*
2914                                  * For LOOPBACK the prison_local_ip6() call
2915                                  * will transmute the ipv6 address to the
2916                                  * proper value.
2917                                  */
2918                                 if ((error = prison_local_ip6(td->td_ucred, &sin6->sin6_addr,
2919                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2920                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2921                                         goto out;
2922                                 }
2923                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2924                                         bindall = 0;
2925                                         /* KAME hack: embed scopeid */
2926                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2927                                                 error = EINVAL;
2928                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2929                                                 goto out;
2930                                         }
2931                                 }
2932                                 /* this must be cleared for ifa_ifwithaddr() */
2933                                 sin6->sin6_scope_id = 0;
2934                                 break;
2935                         }
2936 #endif
2937                 default:
2938                         error = EAFNOSUPPORT;
2939                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2940                         goto out;
2941                 }
2942         }
2943         /* Setup a vrf_id to be the default for the non-bind-all case. */
2944         vrf_id = inp->def_vrf_id;
2945
2946         if (lport) {
2947                 /*
2948                  * Did the caller specify a port? if so we must see if an ep
2949                  * already has this one bound.
2950                  */
2951                 /* got to be root to get at low ports */
2952                 if (ntohs(lport) < IPPORT_RESERVED &&
2953                     (error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) {
2954                         goto out;
2955                 }
2956                 SCTP_INP_INCR_REF(inp);
2957                 SCTP_INP_WUNLOCK(inp);
2958                 if (bindall) {
2959                         vrf_id = inp->def_vrf_id;
2960                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2961                         if (inp_tmp != NULL) {
2962                                 /*
2963                                  * lock guy returned and lower count note
2964                                  * that we are not bound so inp_tmp should
2965                                  * NEVER be inp. And it is this inp
2966                                  * (inp_tmp) that gets the reference bump,
2967                                  * so we must lower it.
2968                                  */
2969                                 SCTP_INP_DECR_REF(inp_tmp);
2970                                 /* unlock info */
2971                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2972                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2973                                         /*
2974                                          * Ok, must be one-2-one and
2975                                          * allowing port re-use
2976                                          */
2977                                         port_reuse_active = 1;
2978                                         goto continue_anyway;
2979                                 }
2980                                 SCTP_INP_WLOCK(inp);
2981                                 SCTP_INP_DECR_REF(inp);
2982                                 error = EADDRINUSE;
2983                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2984                                 goto out;
2985                         }
2986                 } else {
2987                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2988                         if (inp_tmp != NULL) {
2989                                 /*
2990                                  * lock guy returned and lower count note
2991                                  * that we are not bound so inp_tmp should
2992                                  * NEVER be inp. And it is this inp
2993                                  * (inp_tmp) that gets the reference bump,
2994                                  * so we must lower it.
2995                                  */
2996                                 SCTP_INP_DECR_REF(inp_tmp);
2997                                 /* unlock info */
2998                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2999                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3000                                         /*
3001                                          * Ok, must be one-2-one and
3002                                          * allowing port re-use
3003                                          */
3004                                         port_reuse_active = 1;
3005                                         goto continue_anyway;
3006                                 }
3007                                 SCTP_INP_WLOCK(inp);
3008                                 SCTP_INP_DECR_REF(inp);
3009                                 error = EADDRINUSE;
3010                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3011                                 goto out;
3012                         }
3013                 }
3014 continue_anyway:
3015                 SCTP_INP_WLOCK(inp);
3016                 SCTP_INP_DECR_REF(inp);
3017                 if (bindall) {
3018                         /* verify that no lport is not used by a singleton */
3019                         if ((port_reuse_active == 0) &&
3020                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
3021                                 /* Sorry someone already has this one bound */
3022                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3023                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3024                                         port_reuse_active = 1;
3025                                 } else {
3026                                         error = EADDRINUSE;
3027                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3028                                         goto out;
3029                                 }
3030                         }
3031                 }
3032         } else {
3033                 uint16_t first, last, candidate;
3034                 uint16_t count;
3035
3036                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3037                         first = MODULE_GLOBAL(ipport_hifirstauto);
3038                         last = MODULE_GLOBAL(ipport_hilastauto);
3039                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3040                         if ((error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) {
3041                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3042                                 goto out;
3043                         }
3044                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3045                         last = MODULE_GLOBAL(ipport_lowlastauto);
3046                 } else {
3047                         first = MODULE_GLOBAL(ipport_firstauto);
3048                         last = MODULE_GLOBAL(ipport_lastauto);
3049                 }
3050                 if (first > last) {
3051                         uint16_t temp;
3052
3053                         temp = first;
3054                         first = last;
3055                         last = temp;
3056                 }
3057                 count = last - first + 1;       /* number of candidates */
3058                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3059
3060                 for (;;) {
3061                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3062                                 lport = htons(candidate);
3063                                 break;
3064                         }
3065                         if (--count == 0) {
3066                                 error = EADDRINUSE;
3067                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3068                                 goto out;
3069                         }
3070                         if (candidate == last)
3071                                 candidate = first;
3072                         else
3073                                 candidate = candidate + 1;
3074                 }
3075         }
3076         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3077             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3078                 /*
3079                  * this really should not happen. The guy did a non-blocking
3080                  * bind and then did a close at the same time.
3081                  */
3082                 error = EINVAL;
3083                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3084                 goto out;
3085         }
3086         /* ok we look clear to give out this port, so lets setup the binding */
3087         if (bindall) {
3088                 /* binding to all addresses, so just set in the proper flags */
3089                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3090                 /* set the automatic addr changes from kernel flag */
3091                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3092                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3093                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3094                 } else {
3095                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3096                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3097                 }
3098                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3099                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3100                 } else {
3101                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3102                 }
3103                 /*
3104                  * set the automatic mobility_base from kernel flag (by
3105                  * micchie)
3106                  */
3107                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3108                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3109                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3110                 } else {
3111                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3112                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3113                 }
3114                 /*
3115                  * set the automatic mobility_fasthandoff from kernel flag
3116                  * (by micchie)
3117                  */
3118                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3119                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3120                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3121                 } else {
3122                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3123                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3124                 }
3125         } else {
3126                 /*
3127                  * bind specific, make sure flags is off and add a new
3128                  * address structure to the sctp_addr_list inside the ep
3129                  * structure.
3130                  *
3131                  * We will need to allocate one and insert it at the head.
3132                  * The socketopt call can just insert new addresses in there
3133                  * as well. It will also have to do the embed scope kame
3134                  * hack too (before adding).
3135                  */
3136                 struct sctp_ifa *ifa;
3137                 union sctp_sockstore store;
3138
3139                 memset(&store, 0, sizeof(store));
3140                 switch (addr->sa_family) {
3141 #ifdef INET
3142                 case AF_INET:
3143                         memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3144                         store.sin.sin_port = 0;
3145                         break;
3146 #endif
3147 #ifdef INET6
3148                 case AF_INET6:
3149                         memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3150                         store.sin6.sin6_port = 0;
3151                         break;
3152 #endif
3153                 default:
3154                         break;
3155                 }
3156                 /*
3157                  * first find the interface with the bound address need to
3158                  * zero out the port to find the address! yuck! can't do
3159                  * this earlier since need port for sctp_pcb_findep()
3160                  */
3161                 if (sctp_ifap != NULL) {
3162                         ifa = sctp_ifap;
3163                 } else {
3164                         /*
3165                          * Note for BSD we hit here always other O/S's will
3166                          * pass things in via the sctp_ifap argument.
3167                          */
3168                         ifa = sctp_find_ifa_by_addr(&store.sa,
3169                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3170                 }
3171                 if (ifa == NULL) {
3172                         error = EADDRNOTAVAIL;
3173                         /* Can't find an interface with that address */
3174                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3175                         goto out;
3176                 }
3177 #ifdef INET6
3178                 if (addr->sa_family == AF_INET6) {
3179                         /* GAK, more FIXME IFA lock? */
3180                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3181                                 /* Can't bind a non-existent addr. */
3182                                 error = EINVAL;
3183                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3184                                 goto out;
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                         goto out;
3199                 inp->laddr_count++;
3200         }
3201         /* find the bucket */
3202         if (port_reuse_active) {
3203                 /* Put it into tcp 1-2-1 hash */
3204                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3205                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3206         } else {
3207                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3208         }
3209         /* put it in the bucket */
3210         LIST_INSERT_HEAD(head, inp, sctp_hash);
3211         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3212             (void *)head, ntohs(lport), port_reuse_active);
3213         /* set in the port */
3214         inp->sctp_lport = lport;
3215
3216         /* turn off just the unbound flag */
3217         KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 0,
3218             ("%s: inp %p is already bound", __func__, inp));
3219         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3220 out:
3221         return (error);
3222 }
3223
3224 int
3225 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
3226     struct sctp_ifa *sctp_ifap, struct thread *td)
3227 {
3228         struct sctp_inpcb *inp;
3229         int error;
3230
3231         inp = so->so_pcb;
3232         SCTP_INP_INFO_WLOCK();
3233         SCTP_INP_WLOCK(inp);
3234         error = sctp_inpcb_bind_locked(inp, addr, sctp_ifap, td);
3235         SCTP_INP_WUNLOCK(inp);
3236         SCTP_INP_INFO_WUNLOCK();
3237         return (error);
3238 }
3239
3240 static void
3241 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3242 {
3243         struct sctp_iterator *it, *nit;
3244
3245         /*
3246          * We enter with the only the ITERATOR_LOCK in place and a write
3247          * lock on the inp_info stuff.
3248          */
3249         it = sctp_it_ctl.cur_it;
3250         if (it && (it->vn != curvnet)) {
3251                 /* Its not looking at our VNET */
3252                 return;
3253         }
3254         if (it && (it->inp == inp)) {
3255                 /*
3256                  * This is tricky and we hold the iterator lock, but when it
3257                  * returns and gets the lock (when we release it) the
3258                  * iterator will try to operate on inp. We need to stop that
3259                  * from happening. But of course the iterator has a
3260                  * reference on the stcb and inp. We can mark it and it will
3261                  * stop.
3262                  *
3263                  * If its a single iterator situation, we set the end
3264                  * iterator flag. Otherwise we set the iterator to go to the
3265                  * next inp.
3266                  *
3267                  */
3268                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3269                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3270                 } else {
3271                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3272                 }
3273         }
3274         /*
3275          * Now go through and remove any single reference to our inp that
3276          * may be still pending on the list
3277          */
3278         SCTP_IPI_ITERATOR_WQ_LOCK();
3279         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3280                 if (it->vn != curvnet) {
3281                         continue;
3282                 }
3283                 if (it->inp == inp) {
3284                         /* This one points to me is it inp specific? */
3285                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3286                                 /* Remove and free this one */
3287                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3288                                     it, sctp_nxt_itr);
3289                                 if (it->function_atend != NULL) {
3290                                         (*it->function_atend) (it->pointer, it->val);
3291                                 }
3292                                 SCTP_FREE(it, SCTP_M_ITER);
3293                         } else {
3294                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3295                                 if (it->inp) {
3296                                         SCTP_INP_INCR_REF(it->inp);
3297                                 }
3298                         }
3299                         /*
3300                          * When its put in the refcnt is incremented so decr
3301                          * it
3302                          */
3303                         SCTP_INP_DECR_REF(inp);
3304                 }
3305         }
3306         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3307 }
3308
3309 /* release sctp_inpcb unbind the port */
3310 void
3311 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3312 {
3313         /*
3314          * Here we free a endpoint. We must find it (if it is in the Hash
3315          * table) and remove it from there. Then we must also find it in the
3316          * overall list and remove it from there. After all removals are
3317          * complete then any timer has to be stopped. Then start the actual
3318          * freeing. a) Any local lists. b) Any associations. c) The hash of
3319          * all associations. d) finally the ep itself.
3320          */
3321         struct sctp_tcb *stcb, *nstcb;
3322         struct sctp_laddr *laddr, *nladdr;
3323         struct inpcb *ip_pcb;
3324         struct socket *so;
3325         int being_refed = 0;
3326         struct sctp_queued_to_read *sq, *nsq;
3327         int cnt;
3328         sctp_sharedkey_t *shared_key, *nshared_key;
3329
3330 #ifdef SCTP_LOG_CLOSING
3331         sctp_log_closing(inp, NULL, 0);
3332 #endif
3333         SCTP_ITERATOR_LOCK();
3334         /* mark any iterators on the list or being processed */
3335         sctp_iterator_inp_being_freed(inp);
3336         SCTP_ITERATOR_UNLOCK();
3337
3338         SCTP_ASOC_CREATE_LOCK(inp);
3339         SCTP_INP_INFO_WLOCK();
3340         SCTP_INP_WLOCK(inp);
3341         so = inp->sctp_socket;
3342         KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) != 0,
3343             ("%s: inp %p still has socket", __func__, inp));
3344         KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) == 0,
3345             ("%s: double free of inp %p", __func__, inp));
3346         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3347                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3348                 /* socket is gone, so no more wakeups allowed */
3349                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3350                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3351                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3352         }
3353         /* First time through we have the socket lock, after that no more. */
3354         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3355             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3356
3357         if (inp->control) {
3358                 sctp_m_freem(inp->control);
3359                 inp->control = NULL;
3360         }
3361         if (inp->pkt) {
3362                 sctp_m_freem(inp->pkt);
3363                 inp->pkt = NULL;
3364         }
3365         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3366                                          * here but I will be nice :> (i.e.
3367                                          * ip_pcb = ep;) */
3368         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3369                 int cnt_in_sd;
3370
3371                 cnt_in_sd = 0;
3372                 LIST_FOREACH_SAFE(stcb, &inp->sctp_asoc_list, sctp_tcblist, nstcb) {
3373                         SCTP_TCB_LOCK(stcb);
3374                         /* Disconnect the socket please. */
3375                         stcb->sctp_socket = NULL;
3376                         SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_CLOSED_SOCKET);
3377                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3378                                 /* Skip guys being freed */
3379                                 cnt_in_sd++;
3380                                 if (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3381                                         /*
3382                                          * Special case - we did not start a
3383                                          * kill timer on the asoc due to it
3384                                          * was not closed. So go ahead and
3385                                          * start it now.
3386                                          */
3387                                         SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
3388                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
3389                                 }
3390                                 SCTP_TCB_UNLOCK(stcb);
3391                                 continue;
3392                         }
3393                         if (((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
3394                             (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) &&
3395                             (stcb->asoc.total_output_queue_size == 0)) {
3396                                 /*
3397                                  * If we have data in queue, we don't want
3398                                  * to just free since the app may have done,
3399                                  * send()/close or connect/send/close. And
3400                                  * it wants the data to get across first.
3401                                  */
3402                                 /* Just abandon things in the front states */
3403                                 if (sctp_free_assoc(inp, stcb, SCTP_PCBFREE_NOFORCE,
3404                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3405                                         cnt_in_sd++;
3406                                 }
3407                                 continue;
3408                         }
3409                         if ((stcb->asoc.size_on_reasm_queue > 0) ||
3410                             (stcb->asoc.control_pdapi) ||
3411                             (stcb->asoc.size_on_all_streams > 0) ||
3412                             ((so != NULL) && (SCTP_SBAVAIL(&so->so_rcv) > 0))) {
3413                                 /* Left with Data unread */
3414                                 struct mbuf *op_err;
3415
3416                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3417                                 stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3418                                 sctp_send_abort_tcb(stcb, op_err, SCTP_SO_LOCKED);
3419                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3420                                 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
3421                                     (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3422                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3423                                 }
3424                                 if (sctp_free_assoc(inp, stcb,
3425                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3426                                         cnt_in_sd++;
3427                                 }
3428                                 continue;
3429                         } else if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
3430                                     TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
3431                             (stcb->asoc.stream_queue_cnt == 0)) {
3432                                 if ((*stcb->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, &stcb->asoc)) {
3433                                         goto abort_anyway;
3434                                 }
3435                                 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
3436                                     (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3437                                         struct sctp_nets *netp;
3438
3439                                         /*
3440                                          * there is nothing queued to send,
3441                                          * so I send shutdown
3442                                          */
3443                                         if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
3444                                             (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3445                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3446                                         }
3447                                         SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT);
3448                                         sctp_stop_timers_for_shutdown(stcb);
3449                                         if (stcb->asoc.alternate) {
3450                                                 netp = stcb->asoc.alternate;
3451                                         } else {
3452                                                 netp = stcb->asoc.primary_destination;
3453                                         }
3454                                         sctp_send_shutdown(stcb, netp);
3455                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
3456                                             netp);
3457                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, NULL);
3458                                         sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3459                                 }
3460                         } else {
3461                                 /* mark into shutdown pending */
3462                                 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING);
3463                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, NULL);
3464                                 if ((*stcb->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, &stcb->asoc)) {
3465                                         SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT);
3466                                 }
3467                                 if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
3468                                     TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
3469                                     (stcb->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3470                                         struct mbuf *op_err;
3471
3472                         abort_anyway:
3473                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3474                                         stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3475                                         sctp_send_abort_tcb(stcb, op_err, SCTP_SO_LOCKED);
3476                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3477                                         if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
3478                                             (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3479                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3480                                         }
3481                                         if (sctp_free_assoc(inp, stcb,
3482                                             SCTP_PCBFREE_NOFORCE,
3483                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3484                                                 cnt_in_sd++;
3485                                         }
3486                                         continue;
3487                                 } else {
3488                                         sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3489                                 }
3490                         }
3491                         cnt_in_sd++;
3492                         SCTP_TCB_UNLOCK(stcb);
3493                 }
3494                 /* now is there some left in our SHUTDOWN state? */
3495                 if (cnt_in_sd) {
3496 #ifdef SCTP_LOG_CLOSING
3497                         sctp_log_closing(inp, NULL, 2);
3498 #endif
3499                         inp->sctp_socket = NULL;
3500                         SCTP_INP_WUNLOCK(inp);
3501                         SCTP_ASOC_CREATE_UNLOCK(inp);
3502                         SCTP_INP_INFO_WUNLOCK();
3503                         return;
3504                 }
3505         }
3506         inp->sctp_socket = NULL;
3507         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
3508                 /*
3509                  * ok, this guy has been bound. It's port is somewhere in
3510                  * the SCTP_BASE_INFO(hash table). Remove it!
3511                  */
3512                 LIST_REMOVE(inp, sctp_hash);
3513                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3514         }
3515
3516         /*
3517          * If there is a timer running to kill us, forget it, since it may
3518          * have a contest on the INP lock.. which would cause us to die ...
3519          */
3520         cnt = 0;
3521         LIST_FOREACH_SAFE(stcb, &inp->sctp_asoc_list, sctp_tcblist, nstcb) {
3522                 SCTP_TCB_LOCK(stcb);
3523                 if (immediate != SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3524                         /* Disconnect the socket please */
3525                         stcb->sctp_socket = NULL;
3526                         SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_CLOSED_SOCKET);
3527                 }
3528                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3529                         if (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3530                                 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
3531                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
3532                         }
3533                         cnt++;
3534                         SCTP_TCB_UNLOCK(stcb);
3535                         continue;
3536                 }
3537                 /* Free associations that are NOT killing us */
3538                 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT) &&
3539                     ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3540                         struct mbuf *op_err;
3541
3542                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3543                         stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3544                         sctp_send_abort_tcb(stcb, op_err, SCTP_SO_LOCKED);
3545                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3546                 } else if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3547                         cnt++;
3548                         SCTP_TCB_UNLOCK(stcb);
3549                         continue;
3550                 }
3551                 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
3552                     (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3553                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3554                 }
3555                 if (sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE,
3556                     SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3557                         cnt++;
3558                 }
3559         }
3560         if (cnt) {
3561                 /* Ok we have someone out there that will kill us */
3562 #ifdef SCTP_LOG_CLOSING
3563                 sctp_log_closing(inp, NULL, 3);
3564 #endif
3565                 SCTP_INP_WUNLOCK(inp);
3566                 SCTP_ASOC_CREATE_UNLOCK(inp);
3567                 SCTP_INP_INFO_WUNLOCK();
3568                 return;
3569         }
3570         if (SCTP_INP_LOCK_CONTENDED(inp))
3571                 being_refed++;
3572         if (SCTP_INP_READ_CONTENDED(inp))
3573                 being_refed++;
3574         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3575                 being_refed++;
3576         /* NOTE: 0 refcount also means no timers are referencing us. */
3577         if ((inp->refcount) ||
3578             (being_refed) ||
3579             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3580 #ifdef SCTP_LOG_CLOSING
3581                 sctp_log_closing(inp, NULL, 4);
3582 #endif
3583                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3584                 SCTP_INP_WUNLOCK(inp);
3585                 SCTP_ASOC_CREATE_UNLOCK(inp);
3586                 SCTP_INP_INFO_WUNLOCK();
3587                 return;
3588         }
3589         inp->sctp_ep.signature_change.type = 0;
3590         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3591         /*
3592          * Remove it from the list .. last thing we need a lock for.
3593          */
3594         LIST_REMOVE(inp, sctp_list);
3595         SCTP_INP_WUNLOCK(inp);
3596         SCTP_ASOC_CREATE_UNLOCK(inp);
3597         SCTP_INP_INFO_WUNLOCK();
3598
3599 #ifdef SCTP_LOG_CLOSING
3600         sctp_log_closing(inp, NULL, 5);
3601 #endif
3602         if ((inp->sctp_asocidhash) != NULL) {
3603                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3604                 inp->sctp_asocidhash = NULL;
3605         }
3606         /* sa_ignore FREED_MEMORY */
3607         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3608                 /* Its only abandoned if it had data left */
3609                 if (sq->length)
3610                         SCTP_STAT_INCR(sctps_left_abandon);
3611
3612                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3613                 sctp_free_remote_addr(sq->whoFrom);
3614                 if (so)
3615                         so->so_rcv.sb_cc -= sq->length;
3616                 if (sq->data) {
3617                         sctp_m_freem(sq->data);
3618                         sq->data = NULL;
3619                 }
3620                 /*
3621                  * no need to free the net count, since at this point all
3622                  * assoc's are gone.
3623                  */
3624                 sctp_free_a_readq(NULL, sq);
3625         }
3626         /* Now the sctp_pcb things */
3627         /*
3628          * free each asoc if it is not already closed/free. we can't use the
3629          * macro here since le_next will get freed as part of the
3630          * sctp_free_assoc() call.
3631          */
3632         if (ip_pcb->inp_options) {
3633                 (void)sctp_m_free(ip_pcb->inp_options);
3634                 ip_pcb->inp_options = 0;
3635         }
3636 #ifdef INET6
3637         if (ip_pcb->inp_vflag & INP_IPV6) {
3638                 ip6_freepcbopts(ip_pcb->in6p_outputopts);
3639         }
3640 #endif                          /* INET6 */
3641         ip_pcb->inp_vflag = 0;
3642         /* free up authentication fields */
3643         if (inp->sctp_ep.local_auth_chunks != NULL)
3644                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3645         if (inp->sctp_ep.local_hmacs != NULL)
3646                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3647
3648         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3649                 LIST_REMOVE(shared_key, next);
3650                 sctp_free_sharedkey(shared_key);
3651                 /* sa_ignore FREED_MEMORY */
3652         }
3653
3654         /*
3655          * if we have an address list the following will free the list of
3656          * ifaddr's that are set into this ep. Again macro limitations here,
3657          * since the LIST_FOREACH could be a bad idea.
3658          */
3659         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3660                 sctp_remove_laddr(laddr);
3661         }
3662
3663 #ifdef SCTP_TRACK_FREED_ASOCS
3664         /* TEMP CODE */
3665         LIST_FOREACH_SAFE(stcb, &inp->sctp_asoc_free_list, sctp_tcblist, nstcb) {
3666                 LIST_REMOVE(stcb, sctp_tcblist);
3667                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
3668                 SCTP_DECR_ASOC_COUNT();
3669         }
3670         /* *** END TEMP CODE *** */
3671 #endif
3672         /* Now lets see about freeing the EP hash table. */
3673         if (inp->sctp_tcbhash != NULL) {
3674                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3675                 inp->sctp_tcbhash = NULL;
3676         }
3677         /* Now we must put the ep memory back into the zone pool */
3678         crfree(inp->ip_inp.inp.inp_cred);
3679         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3680         SCTP_INP_LOCK_DESTROY(inp);
3681         SCTP_INP_READ_DESTROY(inp);
3682         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3683         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3684         SCTP_DECR_EP_COUNT();
3685 }
3686
3687 struct sctp_nets *
3688 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3689 {
3690         struct sctp_nets *net;
3691
3692         /* locate the address */
3693         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3694                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3695                         return (net);
3696         }
3697         return (NULL);
3698 }
3699
3700 int
3701 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3702 {
3703         struct sctp_ifa *sctp_ifa;
3704
3705         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3706         if (sctp_ifa) {
3707                 return (1);
3708         } else {
3709                 return (0);
3710         }
3711 }
3712
3713 /*
3714  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3715  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3716  * stats of stuff.
3717  */
3718 int
3719 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3720     struct sctp_nets **netp, uint16_t port, int set_scope, int from)
3721 {
3722         /*
3723          * The following is redundant to the same lines in the
3724          * sctp_aloc_assoc() but is needed since others call the add address
3725          * function
3726          */
3727         struct sctp_nets *net, *netfirst;
3728         int addr_inscope;
3729
3730         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3731             from);
3732         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3733
3734         netfirst = sctp_findnet(stcb, newaddr);
3735         if (netfirst) {
3736                 /*
3737                  * Lie and return ok, we don't want to make the association
3738                  * go away for this behavior. It will happen in the TCP
3739                  * model in a connected socket. It does not reach the hash
3740                  * table until after the association is built so it can't be
3741                  * found. Mark as reachable, since the initial creation will
3742                  * have been cleared and the NOT_IN_ASSOC flag will have
3743                  * been added... and we don't want to end up removing it
3744                  * back out.
3745                  */
3746                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3747                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3748                             SCTP_ADDR_UNCONFIRMED);
3749                 } else {
3750                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3751                 }
3752
3753                 return (0);
3754         }
3755         addr_inscope = 1;
3756         switch (newaddr->sa_family) {
3757 #ifdef INET
3758         case AF_INET:
3759                 {
3760                         struct sockaddr_in *sin;
3761
3762                         sin = (struct sockaddr_in *)newaddr;
3763                         if (sin->sin_addr.s_addr == 0) {
3764                                 /* Invalid address */
3765                                 return (-1);
3766                         }
3767                         /* zero out the zero area */
3768                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3769
3770                         /* assure len is set */
3771                         sin->sin_len = sizeof(struct sockaddr_in);
3772                         if (set_scope) {
3773                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3774                                         stcb->asoc.scope.ipv4_local_scope = 1;
3775                                 }
3776                         } else {
3777                                 /* Validate the address is in scope */
3778                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3779                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3780                                         addr_inscope = 0;
3781                                 }
3782                         }
3783                         break;
3784                 }
3785 #endif
3786 #ifdef INET6
3787         case AF_INET6:
3788                 {
3789                         struct sockaddr_in6 *sin6;
3790
3791                         sin6 = (struct sockaddr_in6 *)newaddr;
3792                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3793                                 /* Invalid address */
3794                                 return (-1);
3795                         }
3796                         /* assure len is set */
3797                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3798                         if (set_scope) {
3799                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3800                                         stcb->asoc.scope.loopback_scope = 1;
3801                                         stcb->asoc.scope.local_scope = 0;
3802                                         stcb->asoc.scope.ipv4_local_scope = 1;
3803                                         stcb->asoc.scope.site_scope = 1;
3804                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3805                                         /*
3806                                          * If the new destination is a
3807                                          * LINK_LOCAL we must have common
3808                                          * site scope. Don't set the local
3809                                          * scope since we may not share all
3810                                          * links, only loopback can do this.
3811                                          * Links on the local network would
3812                                          * also be on our private network
3813                                          * for v4 too.
3814                                          */
3815                                         stcb->asoc.scope.ipv4_local_scope = 1;
3816                                         stcb->asoc.scope.site_scope = 1;
3817                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3818                                         /*
3819                                          * If the new destination is
3820                                          * SITE_LOCAL then we must have site
3821                                          * scope in common.
3822                                          */
3823                                         stcb->asoc.scope.site_scope = 1;
3824                                 }
3825                         } else {
3826                                 /* Validate the address is in scope */
3827                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3828                                     (stcb->asoc.scope.loopback_scope == 0)) {
3829                                         addr_inscope = 0;
3830                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3831                                     (stcb->asoc.scope.local_scope == 0)) {
3832                                         addr_inscope = 0;
3833                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3834                                     (stcb->asoc.scope.site_scope == 0)) {
3835                                         addr_inscope = 0;
3836                                 }
3837                         }
3838                         break;
3839                 }
3840 #endif
3841         default:
3842                 /* not supported family type */
3843                 return (-1);
3844         }
3845         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3846         if (net == NULL) {
3847                 return (-1);
3848         }
3849         SCTP_INCR_RADDR_COUNT();
3850         memset(net, 0, sizeof(struct sctp_nets));
3851         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3852         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3853         switch (newaddr->sa_family) {
3854 #ifdef INET
3855         case AF_INET:
3856                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3857                 break;
3858 #endif
3859 #ifdef INET6
3860         case AF_INET6:
3861                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3862                 break;
3863 #endif
3864         default:
3865                 break;
3866         }
3867         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3868         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3869                 stcb->asoc.scope.loopback_scope = 1;
3870                 stcb->asoc.scope.ipv4_local_scope = 1;
3871                 stcb->asoc.scope.local_scope = 0;
3872                 stcb->asoc.scope.site_scope = 1;
3873                 addr_inscope = 1;
3874         }
3875         net->failure_threshold = stcb->asoc.def_net_failure;
3876         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3877         if (addr_inscope == 0) {
3878                 net->dest_state = (SCTP_ADDR_REACHABLE |
3879                     SCTP_ADDR_OUT_OF_SCOPE);
3880         } else {
3881                 if (from == SCTP_ADDR_IS_CONFIRMED)
3882                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3883                         net->dest_state = SCTP_ADDR_REACHABLE;
3884                 else
3885                         net->dest_state = SCTP_ADDR_REACHABLE |
3886                             SCTP_ADDR_UNCONFIRMED;
3887         }
3888         /*
3889          * We set this to 0, the timer code knows that this means its an
3890          * initial value
3891          */
3892         net->rto_needed = 1;
3893         net->RTO = 0;
3894         net->RTO_measured = 0;
3895         stcb->asoc.numnets++;
3896         net->ref_count = 1;
3897         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3898         net->port = port;
3899         net->dscp = stcb->asoc.default_dscp;
3900 #ifdef INET6
3901         net->flowlabel = stcb->asoc.default_flowlabel;
3902 #endif
3903         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3904                 net->dest_state |= SCTP_ADDR_NOHB;
3905         } else {
3906                 net->dest_state &= ~SCTP_ADDR_NOHB;
3907         }
3908         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3909                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3910         } else {
3911                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3912         }
3913         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3914         /* Init the timer structure */
3915         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3916         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3917         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3918
3919         /* Now generate a route for this guy */
3920 #ifdef INET6
3921         /* KAME hack: embed scopeid */
3922         if (newaddr->sa_family == AF_INET6) {
3923                 struct sockaddr_in6 *sin6;
3924
3925                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3926                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3927                 sin6->sin6_scope_id = 0;
3928         }
3929 #endif
3930         SCTP_RTALLOC((sctp_route_t *)&net->ro,
3931             stcb->asoc.vrf_id,
3932             stcb->sctp_ep->fibnum);
3933
3934         net->src_addr_selected = 0;
3935         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3936                 /* Get source address */
3937                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3938                     stcb,
3939                     (sctp_route_t *)&net->ro,
3940                     net,
3941                     0,
3942                     stcb->asoc.vrf_id);
3943                 if (stcb->asoc.default_mtu > 0) {
3944                         net->mtu = stcb->asoc.default_mtu;
3945                         switch (net->ro._l_addr.sa.sa_family) {
3946 #ifdef INET
3947                         case AF_INET:
3948                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
3949                                 break;
3950 #endif
3951 #ifdef INET6
3952                         case AF_INET6:
3953                                 net->mtu += SCTP_MIN_OVERHEAD;
3954                                 break;
3955 #endif
3956                         default:
3957                                 break;
3958                         }
3959 #if defined(INET) || defined(INET6)
3960                         if (net->port) {
3961                                 net->mtu += (uint32_t)sizeof(struct udphdr);
3962                         }
3963 #endif
3964                 } else if (net->ro._s_addr != NULL) {
3965                         uint32_t imtu, rmtu, hcmtu;
3966
3967                         net->src_addr_selected = 1;
3968                         /* Now get the interface MTU */
3969                         if (net->ro._s_addr->ifn_p != NULL) {
3970                                 /*
3971                                  * XXX: Should we here just use
3972                                  * net->ro._s_addr->ifn_p->ifn_mtu
3973                                  */
3974                                 imtu = SCTP_GATHER_MTU_FROM_IFN_INFO(net->ro._s_addr->ifn_p->ifn_p,
3975                                     net->ro._s_addr->ifn_p->ifn_index);
3976                         } else {
3977                                 imtu = 0;
3978                         }
3979                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh);
3980                         hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum);
3981                         net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu);
3982                 }
3983         }
3984         if (net->mtu == 0) {
3985                 if (stcb->asoc.default_mtu > 0) {
3986                         net->mtu = stcb->asoc.default_mtu;
3987                         switch (net->ro._l_addr.sa.sa_family) {
3988 #ifdef INET
3989                         case AF_INET:
3990                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
3991                                 break;
3992 #endif
3993 #ifdef INET6
3994                         case AF_INET6:
3995                                 net->mtu += SCTP_MIN_OVERHEAD;
3996                                 break;
3997 #endif
3998                         default:
3999                                 break;
4000                         }
4001 #if defined(INET) || defined(INET6)
4002                         if (net->port) {
4003                                 net->mtu += (uint32_t)sizeof(struct udphdr);
4004                         }
4005 #endif
4006                 } else {
4007                         switch (newaddr->sa_family) {
4008 #ifdef INET
4009                         case AF_INET:
4010                                 net->mtu = SCTP_DEFAULT_MTU;
4011                                 break;
4012 #endif
4013 #ifdef INET6
4014                         case AF_INET6:
4015                                 net->mtu = 1280;
4016                                 break;
4017 #endif
4018                         default:
4019                                 break;
4020                         }
4021                 }
4022         }
4023 #if defined(INET) || defined(INET6)
4024         if (net->port) {
4025                 net->mtu -= (uint32_t)sizeof(struct udphdr);
4026         }
4027 #endif
4028         if (from == SCTP_ALLOC_ASOC) {
4029                 stcb->asoc.smallest_mtu = net->mtu;
4030         }
4031         if (stcb->asoc.smallest_mtu > net->mtu) {
4032                 sctp_pathmtu_adjustment(stcb, net->mtu, true);
4033         }
4034 #ifdef INET6
4035         if (newaddr->sa_family == AF_INET6) {
4036                 struct sockaddr_in6 *sin6;
4037
4038                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4039                 (void)sa6_recoverscope(sin6);
4040         }
4041 #endif
4042
4043         /* JRS - Use the congestion control given in the CC module */
4044         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4045                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4046
4047         /*
4048          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4049          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4050          */
4051         net->find_pseudo_cumack = 1;
4052         net->find_rtx_pseudo_cumack = 1;
4053         /* Choose an initial flowid. */
4054         net->flowid = stcb->asoc.my_vtag ^
4055             ntohs(stcb->rport) ^
4056             ntohs(stcb->sctp_ep->sctp_lport);
4057         net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4058         if (netp) {
4059                 *netp = net;
4060         }
4061         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4062         if (net->ro.ro_nh == NULL) {
4063                 /* Since we have no route put it at the back */
4064                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4065         } else if (netfirst == NULL) {
4066                 /* We are the first one in the pool. */
4067                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4068         } else if (netfirst->ro.ro_nh == NULL) {
4069                 /*
4070                  * First one has NO route. Place this one ahead of the first
4071                  * one.
4072                  */
4073                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4074         } else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) {
4075                 /*
4076                  * This one has a different interface than the one at the
4077                  * top of the list. Place it ahead.
4078                  */
4079                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4080         } else {
4081                 /*
4082                  * Ok we have the same interface as the first one. Move
4083                  * forward until we find either a) one with a NULL route...
4084                  * insert ahead of that b) one with a different ifp.. insert
4085                  * after that. c) end of the list.. insert at the tail.
4086                  */
4087                 struct sctp_nets *netlook;
4088
4089                 do {
4090                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4091                         if (netlook == NULL) {
4092                                 /* End of the list */
4093                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4094                                 break;
4095                         } else if (netlook->ro.ro_nh == NULL) {
4096                                 /* next one has NO route */
4097                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4098                                 break;
4099                         } else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) {
4100                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4101                                     net, sctp_next);
4102                                 break;
4103                         }
4104                         /* Shift forward */
4105                         netfirst = netlook;
4106                 } while (netlook != NULL);
4107         }
4108
4109         /* got to have a primary set */
4110         if (stcb->asoc.primary_destination == 0) {
4111                 stcb->asoc.primary_destination = net;
4112         } else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) &&
4113                     (net->ro.ro_nh) &&
4114             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4115                 /* No route to current primary adopt new primary */
4116                 stcb->asoc.primary_destination = net;
4117         }
4118         /* Validate primary is first */
4119         net = TAILQ_FIRST(&stcb->asoc.nets);
4120         if ((net != stcb->asoc.primary_destination) &&
4121             (stcb->asoc.primary_destination)) {
4122                 /*
4123                  * first one on the list is NOT the primary sctp_cmpaddr()
4124                  * is much more efficient if the primary is the first on the
4125                  * list, make it so.
4126                  */
4127                 TAILQ_REMOVE(&stcb->asoc.nets,
4128                     stcb->asoc.primary_destination, sctp_next);
4129                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4130                     stcb->asoc.primary_destination, sctp_next);
4131         }
4132         return (0);
4133 }
4134
4135 static uint32_t
4136 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4137 {
4138         uint32_t id;
4139         struct sctpasochead *head;
4140         struct sctp_tcb *lstcb;
4141
4142 try_again:
4143         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4144                 /* TSNH */
4145                 return (0);
4146         }
4147         /*
4148          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4149          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4150          */
4151         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4152                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4153         }
4154         id = inp->sctp_associd_counter;
4155         inp->sctp_associd_counter++;
4156         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4157         if (lstcb) {
4158                 goto try_again;
4159         }
4160         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4161         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4162         stcb->asoc.in_asocid_hash = 1;
4163         return (id);
4164 }
4165
4166 /*
4167  * allocate an association and add it to the endpoint. The caller must be
4168  * careful to add all additional addresses once they are know right away or
4169  * else the assoc will be may experience a blackout scenario.
4170  */
4171 static struct sctp_tcb *
4172 sctp_aloc_assoc_locked(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4173     int *error, uint32_t override_tag, uint32_t initial_tsn,
4174     uint32_t vrf_id, uint16_t o_streams, uint16_t port,
4175     struct thread *p,
4176     int initialize_auth_params)
4177 {
4178         /* note the p argument is only valid in unbound sockets */
4179
4180         struct sctp_tcb *stcb;
4181         struct sctp_association *asoc;
4182         struct sctpasochead *head;
4183         uint16_t rport;
4184         int err;
4185
4186         SCTP_INP_INFO_WLOCK_ASSERT();
4187         SCTP_INP_WLOCK_ASSERT(inp);
4188
4189         /*
4190          * Assumption made here: Caller has done a
4191          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4192          * address does not exist already.
4193          */
4194         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4195                 /* Hit max assoc, sorry no more */
4196                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4197                 *error = ENOBUFS;
4198                 return (NULL);
4199         }
4200         if (firstaddr == NULL) {
4201                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4202                 *error = EINVAL;
4203                 return (NULL);
4204         }
4205         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4206                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4207                 *error = EINVAL;
4208                 return (NULL);
4209         }
4210         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4211             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4212             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4213                 /*
4214                  * If its in the TCP pool, its NOT allowed to create an
4215                  * association. The parent listener needs to call
4216                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4217                  * off, or connected one does this.. its an error.
4218                  */
4219                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4220                 *error = EINVAL;
4221                 return (NULL);
4222         }
4223         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4224             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4225                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4226                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4227                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4228                         *error = EINVAL;
4229                         return (NULL);
4230                 }
4231         }
4232         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4233 #ifdef SCTP_DEBUG
4234         if (firstaddr) {
4235                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4236                 switch (firstaddr->sa_family) {
4237 #ifdef INET
4238                 case AF_INET:
4239                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4240                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4241                         break;
4242 #endif
4243 #ifdef INET6
4244                 case AF_INET6:
4245                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4246                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4247                         break;
4248 #endif
4249                 default:
4250                         break;
4251                 }
4252         } else {
4253                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4254         }
4255 #endif                          /* SCTP_DEBUG */
4256         switch (firstaddr->sa_family) {
4257 #ifdef INET
4258         case AF_INET:
4259                 {
4260                         struct sockaddr_in *sin;
4261
4262                         sin = (struct sockaddr_in *)firstaddr;
4263                         if ((ntohs(sin->sin_port) == 0) ||
4264                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4265                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4266                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) ||
4267                             ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
4268                             (SCTP_IPV6_V6ONLY(inp) != 0))) {
4269                                 /* Invalid address */
4270                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4271                                 *error = EINVAL;
4272                                 return (NULL);
4273                         }
4274                         rport = sin->sin_port;
4275                         break;
4276                 }
4277 #endif
4278 #ifdef INET6
4279         case AF_INET6:
4280                 {
4281                         struct sockaddr_in6 *sin6;
4282
4283                         sin6 = (struct sockaddr_in6 *)firstaddr;
4284                         if ((ntohs(sin6->sin6_port) == 0) ||
4285                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4286                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) ||
4287                             ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)) {
4288                                 /* Invalid address */
4289                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4290                                 *error = EINVAL;
4291                                 return (NULL);
4292                         }
4293                         rport = sin6->sin6_port;
4294                         break;
4295                 }
4296 #endif
4297         default:
4298                 /* not supported family type */
4299                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4300                 *error = EINVAL;
4301                 return (NULL);
4302         }
4303         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4304                 /*
4305                  * If you have not performed a bind, then we need to do the
4306                  * ephemeral bind for you.
4307                  */
4308                 if ((err = sctp_inpcb_bind_locked(inp, NULL, NULL, p))) {
4309                         /* bind error, probably perm */
4310                         *error = err;
4311                         return (NULL);
4312                 }
4313         }
4314         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4315         if (stcb == NULL) {
4316                 /* out of memory? */
4317                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4318                 *error = ENOMEM;
4319                 return (NULL);
4320         }
4321         SCTP_INCR_ASOC_COUNT();
4322
4323         memset(stcb, 0, sizeof(*stcb));
4324         asoc = &stcb->asoc;
4325
4326         SCTP_TCB_LOCK_INIT(stcb);
4327         stcb->rport = rport;
4328         /* setup back pointer's */
4329         stcb->sctp_ep = inp;
4330         stcb->sctp_socket = inp->sctp_socket;
4331         if ((err = sctp_init_asoc(inp, stcb, override_tag, initial_tsn, vrf_id, o_streams))) {
4332                 /* failed */
4333                 SCTP_TCB_LOCK_DESTROY(stcb);
4334                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4335                 SCTP_DECR_ASOC_COUNT();
4336                 *error = err;
4337                 return (NULL);
4338         }
4339         SCTP_TCB_LOCK(stcb);
4340
4341         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4342         /* now that my_vtag is set, add it to the hash */
4343         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4344         /* put it in the bucket in the vtag hash of assoc's for the system */
4345         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4346
4347         if (sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC)) {
4348                 /* failure.. memory error? */
4349                 if (asoc->strmout) {
4350                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4351                         asoc->strmout = NULL;
4352                 }
4353                 if (asoc->mapping_array) {
4354                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4355                         asoc->mapping_array = NULL;
4356                 }
4357                 if (asoc->nr_mapping_array) {
4358                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4359                         asoc->nr_mapping_array = NULL;
4360                 }
4361                 SCTP_DECR_ASOC_COUNT();
4362                 SCTP_TCB_UNLOCK(stcb);
4363                 SCTP_TCB_LOCK_DESTROY(stcb);
4364                 LIST_REMOVE(stcb, sctp_asocs);
4365                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4366                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4367                 SCTP_INP_WUNLOCK(inp);
4368                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4369                 *error = ENOBUFS;
4370                 return (NULL);
4371         }
4372         /* Init all the timers */
4373         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4374         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4375         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4376         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4377         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4378         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4379
4380         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4381         /* now file the port under the hash as well */
4382         if (inp->sctp_tcbhash != NULL) {
4383                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4384                     inp->sctp_hashmark)];
4385                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4386         }
4387         if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) {
4388                 sctp_initialize_auth_params(inp, stcb);
4389         }
4390         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4391         return (stcb);
4392 }
4393
4394 struct sctp_tcb *
4395 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4396     int *error, uint32_t override_tag, uint32_t initial_tsn,
4397     uint32_t vrf_id, uint16_t o_streams, uint16_t port,
4398     struct thread *p,
4399     int initialize_auth_params)
4400 {
4401         struct sctp_tcb *stcb;
4402
4403         SCTP_INP_INFO_WLOCK();
4404         SCTP_INP_WLOCK(inp);
4405         stcb = sctp_aloc_assoc_locked(inp, firstaddr, error, override_tag,
4406             initial_tsn, vrf_id, o_streams, port, p, initialize_auth_params);
4407         SCTP_INP_INFO_WUNLOCK();
4408         SCTP_INP_WUNLOCK(inp);
4409         return (stcb);
4410 }
4411
4412 struct sctp_tcb *
4413 sctp_aloc_assoc_connected(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4414     int *error, uint32_t override_tag, uint32_t initial_tsn,
4415     uint32_t vrf_id, uint16_t o_streams, uint16_t port,
4416     struct thread *p,
4417     int initialize_auth_params)
4418 {
4419         struct sctp_tcb *stcb;
4420
4421         SCTP_INP_INFO_WLOCK();
4422         SCTP_INP_WLOCK(inp);
4423         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
4424             SCTP_IS_LISTENING(inp)) {
4425                 SCTP_INP_INFO_WUNLOCK();
4426                 SCTP_INP_WUNLOCK(inp);
4427                 *error = EINVAL;
4428                 return (NULL);
4429         }
4430         stcb = sctp_aloc_assoc_locked(inp, firstaddr, error, override_tag,
4431             initial_tsn, vrf_id, o_streams, port, p, initialize_auth_params);
4432         SCTP_INP_INFO_WUNLOCK();
4433         if (stcb != NULL && (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4434                 inp->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
4435                 soisconnecting(inp->sctp_socket);
4436         }
4437         SCTP_INP_WUNLOCK(inp);
4438         return (stcb);
4439 }
4440
4441 void
4442 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4443 {
4444         struct sctp_inpcb *inp;
4445         struct sctp_association *asoc;
4446
4447         inp = stcb->sctp_ep;
4448         asoc = &stcb->asoc;
4449         asoc->numnets--;
4450         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4451         if (net == asoc->primary_destination) {
4452                 /* Reset primary */
4453                 struct sctp_nets *lnet;
4454
4455                 lnet = TAILQ_FIRST(&asoc->nets);
4456                 /*
4457                  * Mobility adaptation Ideally, if deleted destination is
4458                  * the primary, it becomes a fast retransmission trigger by
4459                  * the subsequent SET PRIMARY. (by micchie)
4460                  */
4461                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4462                     SCTP_MOBILITY_BASE) ||
4463                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4464                     SCTP_MOBILITY_FASTHANDOFF)) {
4465                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4466                         if (asoc->deleted_primary != NULL) {
4467                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4468                                 goto out;
4469                         }
4470                         asoc->deleted_primary = net;
4471                         atomic_add_int(&net->ref_count, 1);
4472                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4473                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4474                         sctp_mobility_feature_on(stcb->sctp_ep,
4475                             SCTP_MOBILITY_PRIM_DELETED);
4476                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4477                             stcb->sctp_ep, stcb, NULL);
4478                 }
4479 out:
4480                 /* Try to find a confirmed primary */
4481                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4482         }
4483         if (net == asoc->last_data_chunk_from) {
4484                 /* Reset primary */
4485                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4486         }
4487         if (net == asoc->last_control_chunk_from) {
4488                 /* Clear net */
4489                 asoc->last_control_chunk_from = NULL;
4490         }
4491         if (net == asoc->last_net_cmt_send_started) {
4492                 /* Clear net */
4493                 asoc->last_net_cmt_send_started = NULL;
4494         }
4495         if (net == stcb->asoc.alternate) {
4496                 sctp_free_remote_addr(stcb->asoc.alternate);
4497                 stcb->asoc.alternate = NULL;
4498         }
4499         sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
4500             SCTP_FROM_SCTP_PCB + SCTP_LOC_9);
4501         sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
4502             SCTP_FROM_SCTP_PCB + SCTP_LOC_10);
4503         net->dest_state |= SCTP_ADDR_BEING_DELETED;
4504         sctp_free_remote_addr(net);
4505 }
4506
4507 /*
4508  * remove a remote endpoint address from an association, it will fail if the
4509  * address does not exist.
4510  */
4511 int
4512 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4513 {
4514         /*
4515          * Here we need to remove a remote address. This is quite simple, we
4516          * first find it in the list of address for the association
4517          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4518          * on that item. Note we do not allow it to be removed if there are
4519          * no other addresses.
4520          */
4521         struct sctp_association *asoc;
4522         struct sctp_nets *net, *nnet;
4523
4524         asoc = &stcb->asoc;
4525
4526         /* locate the address */
4527         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4528                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4529                         continue;
4530                 }
4531                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4532                     remaddr)) {
4533                         /* we found the guy */
4534                         if (asoc->numnets < 2) {
4535                                 /* Must have at LEAST two remote addresses */
4536                                 return (-1);
4537                         } else {
4538                                 sctp_remove_net(stcb, net);
4539                                 return (0);
4540                         }
4541                 }
4542         }
4543         /* not found. */
4544         return (-2);
4545 }
4546
4547 static bool
4548 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport, uint32_t now)
4549 {
4550         struct sctpvtaghead *chain;
4551         struct sctp_tagblock *twait_block;
4552         int i;
4553
4554         SCTP_INP_INFO_LOCK_ASSERT();
4555         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4556         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4557                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4558                         if ((twait_block->vtag_block[i].tv_sec_at_expire >= now) &&
4559                             (twait_block->vtag_block[i].v_tag == tag) &&
4560                             (twait_block->vtag_block[i].lport == lport) &&
4561                             (twait_block->vtag_block[i].rport == rport)) {
4562                                 return (true);
4563                         }
4564                 }
4565         }
4566         return (false);
4567 }
4568
4569 static void
4570 sctp_set_vtag_block(struct sctp_timewait *vtag_block, uint32_t time,
4571     uint32_t tag, uint16_t lport, uint16_t rport)
4572 {
4573         vtag_block->tv_sec_at_expire = time;
4574         vtag_block->v_tag = tag;
4575         vtag_block->lport = lport;
4576         vtag_block->rport = rport;
4577 }
4578
4579 static void
4580 sctp_add_vtag_to_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4581 {
4582         struct sctpvtaghead *chain;
4583         struct sctp_tagblock *twait_block;
4584         struct timeval now;
4585         uint32_t time;
4586         int i;
4587         bool set;
4588
4589         SCTP_INP_INFO_WLOCK_ASSERT();
4590         (void)SCTP_GETTIME_TIMEVAL(&now);
4591         time = (uint32_t)now.tv_sec + SCTP_BASE_SYSCTL(sctp_vtag_time_wait);
4592         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4593         set = false;
4594         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4595                 /* Block(s) present, lets find space, and expire on the fly */
4596                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4597                         if ((twait_block->vtag_block[i].v_tag == 0) && !set) {
4598                                 sctp_set_vtag_block(twait_block->vtag_block + i, time, tag, lport, rport);
4599                                 set = true;
4600                                 continue;
4601                         }
4602                         if ((twait_block->vtag_block[i].v_tag != 0) &&
4603                             (twait_block->vtag_block[i].tv_sec_at_expire < (uint32_t)now.tv_sec)) {
4604                                 if (set) {
4605                                         /* Audit expires this guy */
4606                                         sctp_set_vtag_block(twait_block->vtag_block + i, 0, 0, 0, 0);
4607                                 } else {
4608                                         /* Reuse it for the new tag */
4609                                         sctp_set_vtag_block(twait_block->vtag_block + i, time, tag, lport, rport);
4610                                         set = true;
4611                                 }
4612                         }
4613                 }
4614                 if (set) {
4615                         /*
4616                          * We only do up to the block where we can place our
4617                          * tag for audits
4618                          */
4619                         break;
4620                 }
4621         }
4622         /* Need to add a new block to chain */
4623         if (!set) {
4624                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4625                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4626                 if (twait_block == NULL) {
4627                         return;
4628                 }
4629                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4630                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4631                 sctp_set_vtag_block(twait_block->vtag_block, time, tag, lport, rport);
4632         }
4633 }
4634
4635 void
4636 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4637 {
4638         struct sctp_tmit_chunk *chk, *nchk;
4639         struct sctp_queued_to_read *control, *ncontrol;
4640
4641         TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) {
4642                 TAILQ_REMOVE(rh, control, next_instrm);
4643                 control->on_strm_q = 0;
4644                 if (control->on_read_q == 0) {
4645                         sctp_free_remote_addr(control->whoFrom);
4646                         if (control->data) {
4647                                 sctp_m_freem(control->data);
4648                                 control->data = NULL;
4649                         }
4650                 }
4651                 /* Reassembly free? */
4652                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
4653                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
4654                         if (chk->data) {
4655                                 sctp_m_freem(chk->data);
4656                                 chk->data = NULL;
4657                         }
4658                         if (chk->holds_key_ref)
4659                                 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4660                         sctp_free_remote_addr(chk->whoTo);
4661                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4662                         SCTP_DECR_CHK_COUNT();
4663                         /* sa_ignore FREED_MEMORY */
4664                 }
4665                 /*
4666                  * We don't free the address here since all the net's were
4667                  * freed above.
4668                  */
4669                 if (control->on_read_q == 0) {
4670                         sctp_free_a_readq(stcb, control);
4671                 }
4672         }
4673 }
4674
4675 /*-
4676  * Free the association after un-hashing the remote port. This
4677  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4678  * expect that the input to this function IS a locked TCB.
4679  * It will return 0, if it did NOT destroy the association (instead
4680  * it unlocks it. It will return NON-zero if it either destroyed the
4681  * association OR the association is already destroyed.
4682  */
4683 int
4684 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4685 {
4686         int i;
4687         struct sctp_association *asoc;
4688         struct sctp_nets *net, *nnet;
4689         struct sctp_laddr *laddr, *naddr;
4690         struct sctp_tmit_chunk *chk, *nchk;
4691         struct sctp_asconf_addr *aparam, *naparam;
4692         struct sctp_asconf_ack *aack, *naack;
4693         struct sctp_stream_reset_list *strrst, *nstrrst;
4694         struct sctp_queued_to_read *sq, *nsq;
4695         struct sctp_stream_queue_pending *sp, *nsp;
4696         sctp_sharedkey_t *shared_key, *nshared_key;
4697         struct socket *so;
4698
4699         /* first, lets purge the entry from the hash table. */
4700         SCTP_TCB_LOCK_ASSERT(stcb);
4701
4702 #ifdef SCTP_LOG_CLOSING
4703         sctp_log_closing(inp, stcb, 6);
4704 #endif
4705         if (stcb->asoc.state == 0) {
4706 #ifdef SCTP_LOG_CLOSING
4707                 sctp_log_closing(inp, NULL, 7);
4708 #endif
4709                 /* there is no asoc, really TSNH :-0 */
4710                 return (1);
4711         }
4712         if (stcb->asoc.alternate) {
4713                 sctp_free_remote_addr(stcb->asoc.alternate);
4714                 stcb->asoc.alternate = NULL;
4715         }
4716         /* TEMP CODE */
4717         if (stcb->freed_from_where == 0) {
4718                 /* Only record the first place free happened from */
4719                 stcb->freed_from_where = from_location;
4720         }
4721         /* TEMP CODE */
4722
4723         asoc = &stcb->asoc;
4724         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4725             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4726                 /* nothing around */
4727                 so = NULL;
4728         else
4729                 so = inp->sctp_socket;
4730
4731         /*
4732          * We used timer based freeing if a reader or writer is in the way.
4733          * So we first check if we are actually being called from a timer,
4734          * if so we abort early if a reader or writer is still in the way.
4735          */
4736         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4737             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4738                 /*
4739                  * is it the timer driving us? if so are the reader/writers
4740                  * gone?
4741                  */
4742                 if (stcb->asoc.refcnt) {
4743                         /* nope, reader or writer in the way */
4744                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4745                         /* no asoc destroyed */
4746                         SCTP_TCB_UNLOCK(stcb);
4747 #ifdef SCTP_LOG_CLOSING
4748                         sctp_log_closing(inp, stcb, 8);
4749 #endif
4750                         return (0);
4751                 }
4752         }
4753         /* Now clean up any other timers */
4754         sctp_stop_association_timers(stcb, false);
4755         /* Now the read queue needs to be cleaned up (only once) */
4756         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4757                 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED);
4758                 SCTP_INP_READ_LOCK(inp);
4759                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4760                         if (sq->stcb == stcb) {
4761                                 sq->do_not_ref_stcb = 1;
4762                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4763                                 /*
4764                                  * If there is no end, there never will be
4765                                  * now.
4766                                  */
4767                                 if (sq->end_added == 0) {
4768                                         /* Held for PD-API clear that. */
4769                                         sq->pdapi_aborted = 1;
4770                                         sq->held_length = 0;
4771                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4772                                                 /*
4773                                                  * Need to add a PD-API
4774                                                  * aborted indication.
4775                                                  * Setting the control_pdapi
4776                                                  * assures that it will be
4777                                                  * added right after this
4778                                                  * msg.
4779                                                  */
4780                                                 uint32_t strseq;
4781
4782                                                 stcb->asoc.control_pdapi = sq;
4783                                                 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff);
4784                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4785                                                     stcb,
4786                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4787                                                     (void *)&strseq,
4788                                                     SCTP_SO_LOCKED);
4789                                                 stcb->asoc.control_pdapi = NULL;
4790                                         }
4791                                 }
4792                                 /* Add an end to wake them */
4793                                 sq->end_added = 1;
4794                         }
4795                 }
4796                 SCTP_INP_READ_UNLOCK(inp);
4797                 if (stcb->block_entry) {
4798                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4799                         stcb->block_entry->error = ECONNRESET;
4800                         stcb->block_entry = NULL;
4801                 }
4802         }
4803         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4804                 /*
4805                  * Someone holds a reference OR the socket is unaccepted
4806                  * yet.
4807                  */
4808                 if ((stcb->asoc.refcnt) ||
4809                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4810                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4811                         SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4812                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4813                 }
4814                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4815                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4816                         /* nothing around */
4817                         so = NULL;
4818                 if (so) {
4819                         /* Wake any reader/writers */
4820                         sctp_sorwakeup(inp, so);
4821                         sctp_sowwakeup(inp, so);
4822                 }
4823                 SCTP_TCB_UNLOCK(stcb);
4824
4825 #ifdef SCTP_LOG_CLOSING
4826                 sctp_log_closing(inp, stcb, 9);
4827 #endif
4828                 /* no asoc destroyed */
4829                 return (0);
4830         }
4831 #ifdef SCTP_LOG_CLOSING
4832         sctp_log_closing(inp, stcb, 10);
4833 #endif
4834         /*
4835          * When I reach here, no others want to kill the assoc yet.. and I
4836          * own the lock. Now its possible an abort comes in when I do the
4837          * lock exchange below to grab all the locks to do the final take
4838          * out. to prevent this we increment the count, which will start a
4839          * timer and blow out above thus assuring us that we hold exclusive
4840          * killing of the asoc. Note that after getting back the TCB lock we
4841          * will go ahead and increment the counter back up and stop any
4842          * timer a passing stranger may have started :-S
4843          */
4844         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4845                 atomic_add_int(&stcb->asoc.refcnt, 1);
4846
4847                 SCTP_TCB_UNLOCK(stcb);
4848                 SCTP_INP_INFO_WLOCK();
4849                 SCTP_INP_WLOCK(inp);
4850                 SCTP_TCB_LOCK(stcb);
4851         }
4852         /* Double check the GONE flag */
4853         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4854             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4855                 /* nothing around */
4856                 so = NULL;
4857
4858         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4859             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4860                 /*
4861                  * For TCP type we need special handling when we are
4862                  * connected. We also include the peel'ed off ones to.
4863                  */
4864                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4865                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4866                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4867                         if (so) {
4868                                 SOCKBUF_LOCK(&so->so_rcv);
4869                                 so->so_state &= ~(SS_ISCONNECTING |
4870                                     SS_ISDISCONNECTING |
4871                                     SS_ISCONFIRMING |
4872                                     SS_ISCONNECTED);
4873                                 so->so_state |= SS_ISDISCONNECTED;
4874                                 socantrcvmore_locked(so);
4875                                 socantsendmore(so);
4876                                 sctp_sowwakeup(inp, so);
4877                                 sctp_sorwakeup(inp, so);
4878                                 SCTP_SOWAKEUP(so);
4879                         }
4880                 }
4881         }
4882
4883         /*
4884          * Make it invalid too, that way if its about to run it will abort
4885          * and return.
4886          */
4887         /* re-increment the lock */
4888         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4889                 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4890         }
4891         if (stcb->asoc.refcnt) {
4892                 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4893                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4894                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4895                         SCTP_INP_INFO_WUNLOCK();
4896                         SCTP_INP_WUNLOCK(inp);
4897                 }
4898                 SCTP_TCB_UNLOCK(stcb);
4899                 return (0);
4900         }
4901         asoc->state = 0;
4902         if (inp->sctp_tcbhash) {
4903                 LIST_REMOVE(stcb, sctp_tcbhash);
4904         }
4905         if (stcb->asoc.in_asocid_hash) {
4906                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4907         }
4908         if (inp->sctp_socket == NULL) {
4909                 stcb->sctp_socket = NULL;
4910         }
4911         /* Now lets remove it from the list of ALL associations in the EP */
4912         LIST_REMOVE(stcb, sctp_tcblist);
4913         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4914                 SCTP_INP_INCR_REF(inp);
4915                 SCTP_INP_WUNLOCK(inp);
4916         }
4917         /* pull from vtag hash */
4918         LIST_REMOVE(stcb, sctp_asocs);
4919         sctp_add_vtag_to_timewait(asoc->my_vtag, inp->sctp_lport, stcb->rport);
4920
4921         /*
4922          * Now restop the timers to be sure this is paranoia at is finest!
4923          */
4924         sctp_stop_association_timers(stcb, true);
4925
4926         /*
4927          * The chunk lists and such SHOULD be empty but we check them just
4928          * in case.
4929          */
4930         /* anything on the wheel needs to be removed */
4931         for (i = 0; i < asoc->streamoutcnt; i++) {
4932                 struct sctp_stream_out *outs;
4933
4934                 outs = &asoc->strmout[i];
4935                 /* now clean up any chunks here */
4936                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4937                         atomic_subtract_int(&asoc->stream_queue_cnt, 1);
4938                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4939                         stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp);
4940                         sctp_free_spbufspace(stcb, asoc, sp);
4941                         if (sp->data) {
4942                                 if (so) {
4943                                         /* Still an open socket - report */
4944                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4945                                             0, (void *)sp, SCTP_SO_LOCKED);
4946                                 }
4947                                 if (sp->data) {
4948                                         sctp_m_freem(sp->data);
4949                                         sp->data = NULL;
4950                                         sp->tail_mbuf = NULL;
4951                                         sp->length = 0;
4952                                 }
4953                         }
4954                         if (sp->net) {
4955                                 sctp_free_remote_addr(sp->net);
4956                                 sp->net = NULL;
4957                         }
4958                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4959                 }
4960         }
4961         /* sa_ignore FREED_MEMORY */
4962         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4963                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4964                 SCTP_FREE(strrst, SCTP_M_STRESET);
4965         }
4966         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4967                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4968                 if (sq->data) {
4969                         sctp_m_freem(sq->data);
4970                         sq->data = NULL;
4971                 }
4972                 sctp_free_remote_addr(sq->whoFrom);
4973                 sq->whoFrom = NULL;
4974                 sq->stcb = NULL;
4975                 /* Free the ctl entry */
4976                 sctp_free_a_readq(stcb, sq);
4977                 /* sa_ignore FREED_MEMORY */
4978         }
4979         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4980                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4981                 if (chk->data) {
4982                         sctp_m_freem(chk->data);
4983                         chk->data = NULL;
4984                 }
4985                 if (chk->holds_key_ref)
4986                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4987                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4988                 SCTP_DECR_CHK_COUNT();
4989                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4990                 asoc->free_chunk_cnt--;
4991                 /* sa_ignore FREED_MEMORY */
4992         }
4993         /* pending send queue SHOULD be empty */
4994         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4995                 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
4996                         asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
4997 #ifdef INVARIANTS
4998                 } else {
4999                         panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5000 #endif
5001                 }
5002                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5003                 if (chk->data) {
5004                         if (so) {
5005                                 /* Still a socket? */
5006                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5007                                     0, chk, SCTP_SO_LOCKED);
5008                         }
5009                         if (chk->data) {
5010                                 sctp_m_freem(chk->data);
5011                                 chk->data = NULL;
5012                         }
5013                 }
5014                 if (chk->holds_key_ref)
5015                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5016                 if (chk->whoTo) {
5017                         sctp_free_remote_addr(chk->whoTo);
5018                         chk->whoTo = NULL;
5019                 }
5020                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5021                 SCTP_DECR_CHK_COUNT();
5022                 /* sa_ignore FREED_MEMORY */
5023         }
5024         /* sent queue SHOULD be empty */
5025         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5026                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5027                         if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5028                                 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5029 #ifdef INVARIANTS
5030                         } else {
5031                                 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5032 #endif
5033                         }
5034                 }
5035                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5036                 if (chk->data) {
5037                         if (so) {
5038                                 /* Still a socket? */
5039                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5040                                     0, chk, SCTP_SO_LOCKED);
5041                         }
5042                         if (chk->data) {
5043                                 sctp_m_freem(chk->data);
5044                                 chk->data = NULL;
5045                         }
5046                 }
5047                 if (chk->holds_key_ref)
5048                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5049                 sctp_free_remote_addr(chk->whoTo);
5050                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5051                 SCTP_DECR_CHK_COUNT();
5052                 /* sa_ignore FREED_MEMORY */
5053         }
5054 #ifdef INVARIANTS
5055         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5056                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5057                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5058                 }
5059         }
5060 #endif
5061         /* control queue MAY not be empty */
5062         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5063                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5064                 if (chk->data) {
5065                         sctp_m_freem(chk->data);
5066                         chk->data = NULL;
5067                 }
5068                 if (chk->holds_key_ref)
5069                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5070                 sctp_free_remote_addr(chk->whoTo);
5071                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5072                 SCTP_DECR_CHK_COUNT();
5073                 /* sa_ignore FREED_MEMORY */
5074         }
5075         /* ASCONF queue MAY not be empty */
5076         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5077                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5078                 if (chk->data) {
5079                         sctp_m_freem(chk->data);
5080                         chk->data = NULL;
5081                 }
5082                 if (chk->holds_key_ref)
5083                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5084                 sctp_free_remote_addr(chk->whoTo);
5085                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5086                 SCTP_DECR_CHK_COUNT();
5087                 /* sa_ignore FREED_MEMORY */
5088         }
5089         if (asoc->mapping_array) {
5090                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5091                 asoc->mapping_array = NULL;
5092         }
5093         if (asoc->nr_mapping_array) {
5094                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5095                 asoc->nr_mapping_array = NULL;
5096         }
5097         /* the stream outs */
5098         if (asoc->strmout) {
5099                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5100                 asoc->strmout = NULL;
5101         }
5102         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5103         if (asoc->strmin) {
5104                 for (i = 0; i < asoc->streamincnt; i++) {
5105                         sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5106                         sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5107                 }
5108                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5109                 asoc->strmin = NULL;
5110         }
5111         asoc->streamincnt = 0;
5112         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5113 #ifdef INVARIANTS
5114                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5115                         panic("no net's left alloc'ed, or list points to itself");
5116                 }
5117 #endif
5118                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5119                 sctp_free_remote_addr(net);
5120         }
5121         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5122                 /* sa_ignore FREED_MEMORY */
5123                 sctp_remove_laddr(laddr);
5124         }
5125
5126         /* pending asconf (address) parameters */
5127         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5128                 /* sa_ignore FREED_MEMORY */
5129                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5130                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5131         }
5132         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5133                 /* sa_ignore FREED_MEMORY */
5134                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5135                 if (aack->data != NULL) {
5136                         sctp_m_freem(aack->data);
5137                 }
5138                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5139         }
5140         /* clean up auth stuff */
5141         if (asoc->local_hmacs)
5142                 sctp_free_hmaclist(asoc->local_hmacs);
5143         if (asoc->peer_hmacs)
5144                 sctp_free_hmaclist(asoc->peer_hmacs);
5145
5146         if (asoc->local_auth_chunks)
5147                 sctp_free_chunklist(asoc->local_auth_chunks);
5148         if (asoc->peer_auth_chunks)
5149                 sctp_free_chunklist(asoc->peer_auth_chunks);
5150
5151         sctp_free_authinfo(&asoc->authinfo);
5152
5153         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5154                 LIST_REMOVE(shared_key, next);
5155                 sctp_free_sharedkey(shared_key);
5156                 /* sa_ignore FREED_MEMORY */
5157         }
5158
5159         /* Insert new items here :> */
5160
5161         /* Get rid of LOCK */
5162         SCTP_TCB_UNLOCK(stcb);
5163         SCTP_TCB_LOCK_DESTROY(stcb);
5164         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5165                 SCTP_INP_INFO_WUNLOCK();
5166                 SCTP_INP_RLOCK(inp);
5167         }
5168 #ifdef SCTP_TRACK_FREED_ASOCS
5169         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5170                 /* now clean up the tasoc itself */
5171                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5172                 SCTP_DECR_ASOC_COUNT();
5173         } else {
5174                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5175         }
5176 #else
5177         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5178         SCTP_DECR_ASOC_COUNT();
5179 #endif
5180         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5181                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5182                         /*
5183                          * If its NOT the inp_free calling us AND sctp_close
5184                          * as been called, we call back...
5185                          */
5186                         SCTP_INP_RUNLOCK(inp);
5187                         /*
5188                          * This will start the kill timer (if we are the
5189                          * last one) since we hold an increment yet. But
5190                          * this is the only safe way to do this since
5191                          * otherwise if the socket closes at the same time
5192                          * we are here we might collide in the cleanup.
5193                          */
5194                         sctp_inpcb_free(inp,
5195                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5196                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5197                         SCTP_INP_DECR_REF(inp);
5198                 } else {
5199                         /* The socket is still open. */
5200                         SCTP_INP_DECR_REF(inp);
5201                         SCTP_INP_RUNLOCK(inp);
5202                 }
5203         }
5204         /* destroyed the asoc */
5205 #ifdef SCTP_LOG_CLOSING
5206         sctp_log_closing(inp, NULL, 11);
5207 #endif
5208         return (1);
5209 }
5210
5211 /*
5212  * determine if a destination is "reachable" based upon the addresses bound
5213  * to the current endpoint (e.g. only v4 or v6 currently bound)
5214  */
5215 /*
5216  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5217  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5218  * types bound as its endpoint
5219  */
5220 int
5221 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5222 {
5223         struct sctp_inpcb *inp;
5224         int answer;
5225
5226         /*
5227          * No locks here, the TCB, in all cases is already locked and an
5228          * assoc is up. There is either a INP lock by the caller applied (in
5229          * asconf case when deleting an address) or NOT in the HB case,
5230          * however if HB then the INP increment is up and the INP will not
5231          * be removed (on top of the fact that we have a TCB lock). So we
5232          * only want to read the sctp_flags, which is either bound-all or
5233          * not.. no protection needed since once an assoc is up you can't be
5234          * changing your binding.
5235          */
5236         inp = stcb->sctp_ep;
5237         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5238                 /* if bound all, destination is not restricted */
5239                 /*
5240                  * RRS: Question during lock work: Is this correct? If you
5241                  * are bound-all you still might need to obey the V4--V6
5242                  * flags??? IMO this bound-all stuff needs to be removed!
5243                  */
5244                 return (1);
5245         }
5246         /* NOTE: all "scope" checks are done when local addresses are added */
5247         switch (destaddr->sa_family) {
5248 #ifdef INET6
5249         case AF_INET6:
5250                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5251                 break;
5252 #endif
5253 #ifdef INET
5254         case AF_INET:
5255                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5256                 break;
5257 #endif
5258         default:
5259                 /* invalid family, so it's unreachable */
5260                 answer = 0;
5261                 break;
5262         }
5263         return (answer);
5264 }
5265
5266 /*
5267  * update the inp_vflags on an endpoint
5268  */
5269 static void
5270 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5271 {
5272         struct sctp_laddr *laddr;
5273
5274         /* first clear the flag */
5275         inp->ip_inp.inp.inp_vflag = 0;
5276         /* set the flag based on addresses on the ep list */
5277         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5278                 if (laddr->ifa == NULL) {
5279                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5280                             __func__);
5281                         continue;
5282                 }
5283
5284                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5285                         continue;
5286                 }
5287                 switch (laddr->ifa->address.sa.sa_family) {
5288 #ifdef INET6
5289                 case AF_INET6:
5290                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5291                         break;
5292 #endif
5293 #ifdef INET
5294                 case AF_INET:
5295                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5296                         break;
5297 #endif
5298                 default:
5299                         break;
5300                 }
5301         }
5302 }
5303
5304 /*
5305  * Add the address to the endpoint local address list There is nothing to be
5306  * done if we are bound to all addresses
5307  */
5308 void
5309 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5310 {
5311         struct sctp_laddr *laddr;
5312         struct sctp_tcb *stcb;
5313         int fnd, error = 0;
5314
5315         fnd = 0;
5316
5317         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5318                 /* You are already bound to all. You have it already */
5319                 return;
5320         }
5321 #ifdef INET6
5322         if (ifa->address.sa.sa_family == AF_INET6) {
5323                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5324                         /* Can't bind a non-useable addr. */
5325                         return;
5326                 }
5327         }
5328 #endif
5329         /* first, is it already present? */
5330         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5331                 if (laddr->ifa == ifa) {
5332                         fnd = 1;
5333                         break;
5334                 }
5335         }
5336
5337         if (fnd == 0) {
5338                 /* Not in the ep list */
5339                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5340                 if (error != 0)
5341                         return;
5342                 inp->laddr_count++;
5343                 /* update inp_vflag flags */
5344                 switch (ifa->address.sa.sa_family) {
5345 #ifdef INET6
5346                 case AF_INET6:
5347                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5348                         break;
5349 #endif
5350 #ifdef INET
5351                 case AF_INET:
5352                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5353                         break;
5354 #endif
5355                 default:
5356                         break;
5357                 }
5358                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5359                         sctp_add_local_addr_restricted(stcb, ifa);
5360                 }
5361         }
5362         return;
5363 }
5364
5365 /*
5366  * select a new (hopefully reachable) destination net (should only be used
5367  * when we deleted an ep addr that is the only usable source address to reach
5368  * the destination net)
5369  */
5370 static void
5371 sctp_select_primary_destination(struct sctp_tcb *stcb)
5372 {
5373         struct sctp_nets *net;
5374
5375         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5376                 /* for now, we'll just pick the first reachable one we find */
5377                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5378                         continue;
5379                 if (sctp_destination_is_reachable(stcb,
5380                     (struct sockaddr *)&net->ro._l_addr)) {
5381                         /* found a reachable destination */
5382                         stcb->asoc.primary_destination = net;
5383                 }
5384         }
5385         /* I can't there from here! ...we're gonna die shortly... */
5386 }
5387
5388 /*
5389  * Delete the address from the endpoint local address list. There is nothing
5390  * to be done if we are bound to all addresses
5391  */
5392 void
5393 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5394 {
5395         struct sctp_laddr *laddr;
5396         int fnd;
5397
5398         fnd = 0;
5399         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5400                 /* You are already bound to all. You have it already */
5401                 return;
5402         }
5403         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5404                 if (laddr->ifa == ifa) {
5405                         fnd = 1;
5406                         break;
5407                 }
5408         }
5409         if (fnd && (inp->laddr_count < 2)) {
5410                 /* can't delete unless there are at LEAST 2 addresses */
5411                 return;
5412         }
5413         if (fnd) {
5414                 /*
5415                  * clean up any use of this address go through our
5416                  * associations and clear any last_used_address that match
5417                  * this one for each assoc, see if a new primary_destination
5418                  * is needed
5419                  */
5420                 struct sctp_tcb *stcb;
5421
5422                 /* clean up "next_addr_touse" */
5423                 if (inp->next_addr_touse == laddr)
5424                         /* delete this address */
5425                         inp->next_addr_touse = NULL;
5426
5427                 /* clean up "last_used_address" */
5428                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5429                         struct sctp_nets *net;
5430
5431                         SCTP_TCB_LOCK(stcb);
5432                         if (stcb->asoc.last_used_address == laddr)
5433                                 /* delete this address */
5434                                 stcb->asoc.last_used_address = NULL;
5435                         /*
5436                          * Now spin through all the nets and purge any ref
5437                          * to laddr
5438                          */
5439                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5440                                 if (net->ro._s_addr == laddr->ifa) {
5441                                         /* Yep, purge src address selected */
5442                                         RO_NHFREE(&net->ro);
5443                                         sctp_free_ifa(net->ro._s_addr);
5444                                         net->ro._s_addr = NULL;
5445                                         net->src_addr_selected = 0;
5446                                 }
5447                         }
5448                         SCTP_TCB_UNLOCK(stcb);
5449                 }               /* for each tcb */
5450                 /* remove it from the ep list */
5451                 sctp_remove_laddr(laddr);
5452                 inp->laddr_count--;
5453                 /* update inp_vflag flags */
5454                 sctp_update_ep_vflag(inp);
5455         }
5456         return;
5457 }
5458
5459 /*
5460  * Add the address to the TCB local address restricted list.
5461  * This is a "pending" address list (eg. addresses waiting for an
5462  * ASCONF-ACK response) and cannot be used as a valid source address.
5463  */
5464 void
5465 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5466 {
5467         struct sctp_laddr *laddr;
5468         struct sctpladdr *list;
5469
5470         /*
5471          * Assumes TCB is locked.. and possibly the INP. May need to
5472          * confirm/fix that if we need it and is not the case.
5473          */
5474         list = &stcb->asoc.sctp_restricted_addrs;
5475
5476 #ifdef INET6
5477         if (ifa->address.sa.sa_family == AF_INET6) {
5478                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5479                         /* Can't bind a non-existent addr. */
5480                         return;
5481                 }
5482         }
5483 #endif
5484         /* does the address already exist? */
5485         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5486                 if (laddr->ifa == ifa) {
5487                         return;
5488                 }
5489         }
5490
5491         /* add to the list */
5492         (void)sctp_insert_laddr(list, ifa, 0);
5493         return;
5494 }
5495
5496 /*
5497  * Remove a local address from the TCB local address restricted list
5498  */
5499 void
5500 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5501 {
5502         struct sctp_inpcb *inp;
5503         struct sctp_laddr *laddr;
5504
5505         /*
5506          * This is called by asconf work. It is assumed that a) The TCB is
5507          * locked and b) The INP is locked. This is true in as much as I can
5508          * trace through the entry asconf code where I did these locks.
5509          * Again, the ASCONF code is a bit different in that it does lock
5510          * the INP during its work often times. This must be since we don't
5511          * want other proc's looking up things while what they are looking
5512          * up is changing :-D
5513          */
5514
5515         inp = stcb->sctp_ep;
5516         /* if subset bound and don't allow ASCONF's, can't delete last */
5517         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5518             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5519                 if (stcb->sctp_ep->laddr_count < 2) {
5520                         /* can't delete last address */
5521                         return;
5522                 }
5523         }
5524         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5525                 /* remove the address if it exists */
5526                 if (laddr->ifa == NULL)
5527                         continue;
5528                 if (laddr->ifa == ifa) {
5529                         sctp_remove_laddr(laddr);
5530                         return;
5531                 }
5532         }
5533
5534         /* address not found! */
5535         return;
5536 }
5537
5538 /* sysctl */
5539 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5540 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5541
5542 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5543 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5544 int *sctp_cpuarry = NULL;
5545
5546 void
5547 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5548 {
5549         /* Queue a packet to a processor for the specified core */
5550         struct sctp_mcore_queue *qent;
5551         struct sctp_mcore_ctrl *wkq;
5552         int need_wake = 0;
5553
5554         if (sctp_mcore_workers == NULL) {
5555                 /* Something went way bad during setup */
5556                 sctp_input_with_port(m, off, 0);
5557                 return;
5558         }
5559         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5560             (sizeof(struct sctp_mcore_queue)),
5561             SCTP_M_MCORE);
5562         if (qent == NULL) {
5563                 /* This is trouble  */
5564                 sctp_input_with_port(m, off, 0);
5565                 return;
5566         }
5567         qent->vn = curvnet;
5568         qent->m = m;
5569         qent->off = off;
5570         qent->v6 = 0;
5571         wkq = &sctp_mcore_workers[cpu_to_use];
5572         SCTP_MCORE_QLOCK(wkq);
5573
5574         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5575         if (wkq->running == 0) {
5576                 need_wake = 1;
5577         }
5578         SCTP_MCORE_QUNLOCK(wkq);
5579         if (need_wake) {
5580                 wakeup(&wkq->running);
5581         }
5582 }
5583
5584 static void
5585 sctp_mcore_thread(void *arg)
5586 {
5587
5588         struct sctp_mcore_ctrl *wkq;
5589         struct sctp_mcore_queue *qent;
5590
5591         wkq = (struct sctp_mcore_ctrl *)arg;
5592         struct mbuf *m;
5593         int off, v6;
5594
5595         /* Wait for first tickle */
5596         SCTP_MCORE_LOCK(wkq);
5597         wkq->running = 0;
5598         msleep(&wkq->running,
5599             &wkq->core_mtx,
5600             0, "wait for pkt", 0);
5601         SCTP_MCORE_UNLOCK(wkq);
5602
5603         /* Bind to our cpu */
5604         thread_lock(curthread);
5605         sched_bind(curthread, wkq->cpuid);
5606         thread_unlock(curthread);
5607
5608         /* Now lets start working */
5609         SCTP_MCORE_LOCK(wkq);
5610         /* Now grab lock and go */
5611         for (;;) {
5612                 SCTP_MCORE_QLOCK(wkq);
5613 skip_sleep:
5614                 wkq->running = 1;
5615                 qent = TAILQ_FIRST(&wkq->que);
5616                 if (qent) {
5617                         TAILQ_REMOVE(&wkq->que, qent, next);
5618                         SCTP_MCORE_QUNLOCK(wkq);
5619                         CURVNET_SET(qent->vn);
5620                         m = qent->m;
5621                         off = qent->off;
5622                         v6 = qent->v6;
5623                         SCTP_FREE(qent, SCTP_M_MCORE);
5624                         if (v6 == 0) {
5625                                 sctp_input_with_port(m, off, 0);
5626                         } else {
5627                                 SCTP_PRINTF("V6 not yet supported\n");
5628                                 sctp_m_freem(m);
5629                         }
5630                         CURVNET_RESTORE();
5631                         SCTP_MCORE_QLOCK(wkq);
5632                 }
5633                 wkq->running = 0;
5634                 if (!TAILQ_EMPTY(&wkq->que)) {
5635                         goto skip_sleep;
5636                 }
5637                 SCTP_MCORE_QUNLOCK(wkq);
5638                 msleep(&wkq->running,
5639                     &wkq->core_mtx,
5640                     0, "wait for pkt", 0);
5641         }
5642 }
5643
5644 static void
5645 sctp_startup_mcore_threads(void)
5646 {
5647         int i, cpu;
5648
5649         if (mp_ncpus == 1)
5650                 return;
5651
5652         if (sctp_mcore_workers != NULL) {
5653                 /*
5654                  * Already been here in some previous vnet?
5655                  */
5656                 return;
5657         }
5658         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5659             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5660             SCTP_M_MCORE);
5661         if (sctp_mcore_workers == NULL) {
5662                 /* TSNH I hope */
5663                 return;
5664         }
5665         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5666             sizeof(struct sctp_mcore_ctrl)));
5667         /* Init the structures */
5668         for (i = 0; i <= mp_maxid; i++) {
5669                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5670                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5671                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5672                 sctp_mcore_workers[i].cpuid = i;
5673         }
5674         if (sctp_cpuarry == NULL) {
5675                 SCTP_MALLOC(sctp_cpuarry, int *,
5676                     (mp_ncpus * sizeof(int)),
5677                     SCTP_M_MCORE);
5678                 i = 0;
5679                 CPU_FOREACH(cpu) {
5680                         sctp_cpuarry[i] = cpu;
5681                         i++;
5682                 }
5683         }
5684         /* Now start them all */
5685         CPU_FOREACH(cpu) {
5686                 (void)kproc_create(sctp_mcore_thread,
5687                     (void *)&sctp_mcore_workers[cpu],
5688                     &sctp_mcore_workers[cpu].thread_proc,
5689                     0,
5690                     SCTP_KTHREAD_PAGES,
5691                     SCTP_MCORE_NAME);
5692         }
5693 }
5694 #endif
5695
5696 void
5697 sctp_pcb_init(void)
5698 {
5699         /*
5700          * SCTP initialization for the PCB structures should be called by
5701          * the sctp_init() function.
5702          */
5703         int i;
5704         struct timeval tv;
5705
5706         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5707                 /* error I was called twice */
5708                 return;
5709         }
5710         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5711
5712 #if defined(SCTP_LOCAL_TRACE_BUF)
5713         memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log));
5714 #endif
5715 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5716         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5717             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5718             SCTP_M_MCORE);
5719 #endif
5720         (void)SCTP_GETTIME_TIMEVAL(&tv);
5721 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5722         memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1));
5723         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
5724         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
5725 #else
5726         memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat));
5727         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
5728         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
5729 #endif
5730         /* init the empty list of (All) Endpoints */
5731         LIST_INIT(&SCTP_BASE_INFO(listhead));
5732
5733         /* init the hash table of endpoints */
5734         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5735         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5736         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5737         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5738             &SCTP_BASE_INFO(hashasocmark));
5739         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5740             &SCTP_BASE_INFO(hashmark));
5741         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5742             &SCTP_BASE_INFO(hashtcpmark));
5743         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5744         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5745             &SCTP_BASE_INFO(hashvrfmark));
5746
5747         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5748             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5749         /* init the zones */
5750         /*
5751          * FIX ME: Should check for NULL returns, but if it does fail we are
5752          * doomed to panic anyways... add later maybe.
5753          */
5754         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5755             sizeof(struct sctp_inpcb), maxsockets);
5756
5757         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5758             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5759
5760         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5761             sizeof(struct sctp_laddr),
5762             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5763
5764         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5765             sizeof(struct sctp_nets),
5766             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5767
5768         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5769             sizeof(struct sctp_tmit_chunk),
5770             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5771
5772         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5773             sizeof(struct sctp_queued_to_read),
5774             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5775
5776         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5777             sizeof(struct sctp_stream_queue_pending),
5778             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5779
5780         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5781             sizeof(struct sctp_asconf),
5782             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5783
5784         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5785             sizeof(struct sctp_asconf_ack),
5786             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5787
5788         /* Master Lock INIT for info structure */
5789         SCTP_INP_INFO_LOCK_INIT();
5790         SCTP_STATLOG_INIT_LOCK();
5791
5792         SCTP_IPI_COUNT_INIT();
5793         SCTP_IPI_ADDR_INIT();
5794 #ifdef SCTP_PACKET_LOGGING
5795         SCTP_IP_PKTLOG_INIT();
5796 #endif
5797         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5798
5799         SCTP_WQ_ADDR_INIT();
5800         /* not sure if we need all the counts */
5801         SCTP_BASE_INFO(ipi_count_ep) = 0;
5802         /* assoc/tcb zone info */
5803         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5804         /* local addrlist zone info */
5805         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5806         /* remote addrlist zone info */
5807         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5808         /* chunk info */
5809         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5810
5811         /* socket queue zone info */
5812         SCTP_BASE_INFO(ipi_count_readq) = 0;
5813
5814         /* stream out queue cont */
5815         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5816
5817         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5818         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5819
5820         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5821
5822         /* Init the TIMEWAIT list */
5823         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5824                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5825         }
5826         sctp_startup_iterator();
5827
5828 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5829         sctp_startup_mcore_threads();
5830 #endif
5831
5832         /*
5833          * INIT the default VRF which for BSD is the only one, other O/S's
5834          * may have more. But initially they must start with one and then
5835          * add the VRF's as addresses are added.
5836          */
5837         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5838 }
5839
5840 /*
5841  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5842  */
5843 void
5844 sctp_pcb_finish(void)
5845 {
5846         struct sctp_vrflist *vrf_bucket;
5847         struct sctp_vrf *vrf, *nvrf;
5848         struct sctp_ifn *ifn, *nifn;
5849         struct sctp_ifa *ifa, *nifa;
5850         struct sctpvtaghead *chain;
5851         struct sctp_tagblock *twait_block, *prev_twait_block;
5852         struct sctp_laddr *wi, *nwi;
5853         int i;
5854         struct sctp_iterator *it, *nit;
5855
5856         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5857                 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5858                 return;
5859         }
5860         SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5861         /*
5862          * In FreeBSD the iterator thread never exits but we do clean up.
5863          * The only way FreeBSD reaches here is if we have VRF's but we
5864          * still add the ifdef to make it compile on old versions.
5865          */
5866 retry:
5867         SCTP_IPI_ITERATOR_WQ_LOCK();
5868         /*
5869          * sctp_iterator_worker() might be working on an it entry without
5870          * holding the lock.  We won't find it on the list either and
5871          * continue and free/destroy it.  While holding the lock, spin, to
5872          * avoid the race condition as sctp_iterator_worker() will have to
5873          * wait to re-acquire the lock.
5874          */
5875         if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5876                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5877                 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5878                     "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5879                 DELAY(10);
5880                 goto retry;
5881         }
5882         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5883                 if (it->vn != curvnet) {
5884                         continue;
5885                 }
5886                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5887                 if (it->function_atend != NULL) {
5888                         (*it->function_atend) (it->pointer, it->val);
5889                 }
5890                 SCTP_FREE(it, SCTP_M_ITER);
5891         }
5892         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5893         SCTP_ITERATOR_LOCK();
5894         if ((sctp_it_ctl.cur_it) &&
5895             (sctp_it_ctl.cur_it->vn == curvnet)) {
5896                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5897         }
5898         SCTP_ITERATOR_UNLOCK();
5899         SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5900         SCTP_WQ_ADDR_LOCK();
5901         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5902                 LIST_REMOVE(wi, sctp_nxt_addr);
5903                 SCTP_DECR_LADDR_COUNT();
5904                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5905                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
5906                 }
5907                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5908         }
5909         SCTP_WQ_ADDR_UNLOCK();
5910
5911         /*
5912          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5913          * destroyed first).
5914          */
5915         SCTP_IPI_ADDR_WLOCK();
5916         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5917         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5918                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5919                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5920                                 /* free the ifa */
5921                                 LIST_REMOVE(ifa, next_bucket);
5922                                 LIST_REMOVE(ifa, next_ifa);
5923                                 SCTP_FREE(ifa, SCTP_M_IFA);
5924                         }
5925                         /* free the ifn */
5926                         LIST_REMOVE(ifn, next_bucket);
5927                         LIST_REMOVE(ifn, next_ifn);
5928                         SCTP_FREE(ifn, SCTP_M_IFN);
5929                 }
5930                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5931                 /* free the vrf */
5932                 LIST_REMOVE(vrf, next_vrf);
5933                 SCTP_FREE(vrf, SCTP_M_VRF);
5934         }
5935         SCTP_IPI_ADDR_WUNLOCK();
5936         /* free the vrf hashes */
5937         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5938         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5939
5940         /*
5941          * free the TIMEWAIT list elements malloc'd in the function
5942          * sctp_add_vtag_to_timewait()...
5943          */
5944         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5945                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5946                 if (!LIST_EMPTY(chain)) {
5947                         prev_twait_block = NULL;
5948                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5949                                 if (prev_twait_block) {
5950                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5951                                 }
5952                                 prev_twait_block = twait_block;
5953                         }
5954                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5955                 }
5956         }
5957
5958         /* free the locks and mutexes */
5959 #ifdef SCTP_PACKET_LOGGING
5960         SCTP_IP_PKTLOG_DESTROY();
5961 #endif
5962         SCTP_IPI_ADDR_DESTROY();
5963         SCTP_STATLOG_DESTROY();
5964         SCTP_INP_INFO_LOCK_DESTROY();
5965
5966         SCTP_WQ_ADDR_DESTROY();
5967
5968         /* Get rid of other stuff too. */
5969         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5970                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5971         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5972                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5973         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5974                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5975
5976         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5977         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5978         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5979         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5980         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5981         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5982         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5983         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5984         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5985 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5986         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
5987 #endif
5988 }
5989
5990 int
5991 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5992     int offset, int limit,
5993     struct sockaddr *src, struct sockaddr *dst,
5994     struct sockaddr *altsa, uint16_t port)
5995 {
5996         /*
5997          * grub through the INIT pulling addresses and loading them to the
5998          * nets structure in the asoc. The from address in the mbuf should
5999          * also be loaded (if it is not already). This routine can be called
6000          * with either INIT or INIT-ACK's as long as the m points to the IP
6001          * packet and the offset points to the beginning of the parameters.
6002          */
6003         struct sctp_inpcb *inp;
6004         struct sctp_nets *net, *nnet, *net_tmp;
6005         struct sctp_paramhdr *phdr, param_buf;
6006         struct sctp_tcb *stcb_tmp;
6007         uint16_t ptype, plen;
6008         struct sockaddr *sa;
6009         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6010         struct sctp_auth_random *p_random = NULL;
6011         uint16_t random_len = 0;
6012         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6013         struct sctp_auth_hmac_algo *hmacs = NULL;
6014         uint16_t hmacs_len = 0;
6015         uint8_t saw_asconf = 0;
6016         uint8_t saw_asconf_ack = 0;
6017         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6018         struct sctp_auth_chunk_list *chunks = NULL;
6019         uint16_t num_chunks = 0;
6020         sctp_key_t *new_key;
6021         uint32_t keylen;
6022         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6023         uint8_t peer_supports_ecn;
6024         uint8_t peer_supports_prsctp;
6025         uint8_t peer_supports_auth;
6026         uint8_t peer_supports_asconf;
6027         uint8_t peer_supports_asconf_ack;
6028         uint8_t peer_supports_reconfig;
6029         uint8_t peer_supports_nrsack;
6030         uint8_t peer_supports_pktdrop;
6031         uint8_t peer_supports_idata;
6032 #ifdef INET
6033         struct sockaddr_in sin;
6034 #endif
6035 #ifdef INET6
6036         struct sockaddr_in6 sin6;
6037 #endif
6038
6039         /* First get the destination address setup too. */
6040 #ifdef INET
6041         memset(&sin, 0, sizeof(sin));
6042         sin.sin_family = AF_INET;
6043         sin.sin_len = sizeof(sin);
6044         sin.sin_port = stcb->rport;
6045 #endif
6046 #ifdef INET6
6047         memset(&sin6, 0, sizeof(sin6));
6048         sin6.sin6_family = AF_INET6;
6049         sin6.sin6_len = sizeof(struct sockaddr_in6);
6050         sin6.sin6_port = stcb->rport;
6051 #endif
6052         if (altsa) {
6053                 sa = altsa;
6054         } else {
6055                 sa = src;
6056         }
6057         peer_supports_idata = 0;
6058         peer_supports_ecn = 0;
6059         peer_supports_prsctp = 0;
6060         peer_supports_auth = 0;
6061         peer_supports_asconf = 0;
6062         peer_supports_asconf_ack = 0;
6063         peer_supports_reconfig = 0;
6064         peer_supports_nrsack = 0;
6065         peer_supports_pktdrop = 0;
6066         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6067                 /* mark all addresses that we have currently on the list */
6068                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6069         }
6070         /* does the source address already exist? if so skip it */
6071         inp = stcb->sctp_ep;
6072         atomic_add_int(&stcb->asoc.refcnt, 1);
6073         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6074         atomic_subtract_int(&stcb->asoc.refcnt, 1);
6075
6076         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6077                 /* we must add the source address */
6078                 /* no scope set here since we have a tcb already. */
6079                 switch (sa->sa_family) {
6080 #ifdef INET
6081                 case AF_INET:
6082                         if (stcb->asoc.scope.ipv4_addr_legal) {
6083                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6084                                         return (-1);
6085                                 }
6086                         }
6087                         break;
6088 #endif
6089 #ifdef INET6
6090                 case AF_INET6:
6091                         if (stcb->asoc.scope.ipv6_addr_legal) {
6092                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6093                                         return (-2);
6094                                 }
6095                         }
6096                         break;
6097 #endif
6098                 default:
6099                         break;
6100                 }
6101         } else {
6102                 if (net_tmp != NULL && stcb_tmp == stcb) {
6103                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6104                 } else if (stcb_tmp != stcb) {
6105                         /* It belongs to another association? */
6106                         if (stcb_tmp)
6107                                 SCTP_TCB_UNLOCK(stcb_tmp);
6108                         return (-3);
6109                 }
6110         }
6111         if (stcb->asoc.state == 0) {
6112                 /* the assoc was freed? */
6113                 return (-4);
6114         }
6115         /* now we must go through each of the params. */
6116         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
6117         while (phdr) {
6118                 ptype = ntohs(phdr->param_type);
6119                 plen = ntohs(phdr->param_length);
6120                 /*
6121                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6122                  * (uint32_t)ptype, (int)plen);
6123                  */
6124                 if (offset + plen > limit) {
6125                         break;
6126                 }
6127                 if (plen < sizeof(struct sctp_paramhdr)) {
6128                         break;
6129                 }
6130 #ifdef INET
6131                 if (ptype == SCTP_IPV4_ADDRESS) {
6132                         if (stcb->asoc.scope.ipv4_addr_legal) {
6133                                 struct sctp_ipv4addr_param *p4, p4_buf;
6134
6135                                 /* ok get the v4 address and check/add */
6136                                 phdr = sctp_get_next_param(m, offset,
6137                                     (struct sctp_paramhdr *)&p4_buf,
6138                                     sizeof(p4_buf));
6139                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6140                                     phdr == NULL) {
6141                                         return (-5);
6142                                 }
6143                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6144                                 sin.sin_addr.s_addr = p4->addr;
6145                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6146                                         /* Skip multi-cast addresses */
6147                                         goto next_param;
6148                                 }
6149                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6150                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6151                                         goto next_param;
6152                                 }
6153                                 sa = (struct sockaddr *)&sin;
6154                                 inp = stcb->sctp_ep;
6155                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6156                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6157                                     dst, stcb);
6158                                 atomic_subtract_int(&stcb->asoc.refcnt, 1);
6159
6160                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6161                                     inp == NULL) {
6162                                         /* we must add the source address */
6163                                         /*
6164                                          * no scope set since we have a tcb
6165                                          * already
6166                                          */
6167
6168                                         /*
6169                                          * we must validate the state again
6170                                          * here
6171                                          */
6172                         add_it_now:
6173                                         if (stcb->asoc.state == 0) {
6174                                                 /* the assoc was freed? */
6175                                                 return (-7);
6176                                         }
6177                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6178                                                 return (-8);
6179                                         }
6180                                 } else if (stcb_tmp == stcb) {
6181                                         if (stcb->asoc.state == 0) {
6182                                                 /* the assoc was freed? */
6183                                                 return (-10);
6184                                         }
6185                                         if (net != NULL) {
6186                                                 /* clear flag */
6187                                                 net->dest_state &=
6188                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6189                                         }
6190                                 } else {
6191                                         /*
6192                                          * strange, address is in another
6193                                          * assoc? straighten out locks.
6194                                          */
6195                                         if (stcb_tmp) {
6196                                                 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6197                                                         struct mbuf *op_err;
6198                                                         char msg[SCTP_DIAG_INFO_LEN];
6199
6200                                                         /*
6201                                                          * in setup state we
6202                                                          * abort this guy
6203                                                          */
6204                                                         SCTP_SNPRINTF(msg, sizeof(msg),
6205                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6206                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6207                                                             msg);
6208                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6209                                                             stcb_tmp, op_err, false,
6210                                                             SCTP_SO_NOT_LOCKED);
6211                                                         goto add_it_now;
6212                                                 }
6213                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6214                                         }
6215
6216                                         if (stcb->asoc.state == 0) {
6217                                                 /* the assoc was freed? */
6218                                                 return (-12);
6219                                         }
6220                                         return (-13);
6221                                 }
6222                         }
6223                 } else
6224 #endif
6225 #ifdef INET6
6226                 if (ptype == SCTP_IPV6_ADDRESS) {
6227                         if (stcb->asoc.scope.ipv6_addr_legal) {
6228                                 /* ok get the v6 address and check/add */
6229                                 struct sctp_ipv6addr_param *p6, p6_buf;
6230
6231                                 phdr = sctp_get_next_param(m, offset,
6232                                     (struct sctp_paramhdr *)&p6_buf,
6233                                     sizeof(p6_buf));
6234                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6235                                     phdr == NULL) {
6236                                         return (-14);
6237                                 }
6238                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6239                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6240                                     sizeof(p6->addr));
6241                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6242                                         /* Skip multi-cast addresses */
6243                                         goto next_param;
6244                                 }
6245                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6246                                         /*
6247                                          * Link local make no sense without
6248                                          * scope
6249                                          */
6250                                         goto next_param;
6251                                 }
6252                                 sa = (struct sockaddr *)&sin6;
6253                                 inp = stcb->sctp_ep;
6254                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6255                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6256                                     dst, stcb);
6257                                 atomic_subtract_int(&stcb->asoc.refcnt, 1);
6258                                 if (stcb_tmp == NULL &&
6259                                     (inp == stcb->sctp_ep || inp == NULL)) {
6260                                         /*
6261                                          * we must validate the state again
6262                                          * here
6263                                          */
6264                         add_it_now6:
6265                                         if (stcb->asoc.state == 0) {
6266                                                 /* the assoc was freed? */
6267                                                 return (-16);
6268                                         }
6269                                         /*
6270                                          * we must add the address, no scope
6271                                          * set
6272                                          */
6273                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6274                                                 return (-17);
6275                                         }
6276                                 } else if (stcb_tmp == stcb) {
6277                                         /*
6278                                          * we must validate the state again
6279                                          * here
6280                                          */
6281                                         if (stcb->asoc.state == 0) {
6282                                                 /* the assoc was freed? */
6283                                                 return (-19);
6284                                         }
6285                                         if (net != NULL) {
6286                                                 /* clear flag */
6287                                                 net->dest_state &=
6288                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6289                                         }
6290                                 } else {
6291                                         /*
6292                                          * strange, address is in another
6293                                          * assoc? straighten out locks.
6294                                          */
6295                                         if (stcb_tmp) {
6296                                                 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6297                                                         struct mbuf *op_err;
6298                                                         char msg[SCTP_DIAG_INFO_LEN];
6299
6300                                                         /*
6301                                                          * in setup state we
6302                                                          * abort this guy
6303                                                          */
6304                                                         SCTP_SNPRINTF(msg, sizeof(msg),
6305                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6306                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6307                                                             msg);
6308                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6309                                                             stcb_tmp, op_err, false,
6310                                                             SCTP_SO_NOT_LOCKED);
6311                                                         goto add_it_now6;
6312                                                 }
6313                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6314                                         }
6315                                         if (stcb->asoc.state == 0) {
6316                                                 /* the assoc was freed? */
6317                                                 return (-21);
6318                                         }
6319                                         return (-22);
6320                                 }
6321                         }
6322                 } else
6323 #endif
6324                 if (ptype == SCTP_ECN_CAPABLE) {
6325                         peer_supports_ecn = 1;
6326                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6327                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6328                                 struct sctp_adaptation_layer_indication ai,
6329                                                                 *aip;
6330
6331                                 phdr = sctp_get_next_param(m, offset,
6332                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6333                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6334                                 if (aip) {
6335                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6336                                         stcb->asoc.adaptation_needed = 1;
6337                                 }
6338                         }
6339                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6340                         struct sctp_asconf_addr_param lstore, *fee;
6341                         int lptype;
6342                         struct sockaddr *lsa = NULL;
6343 #ifdef INET
6344                         struct sctp_asconf_addrv4_param *fii;
6345 #endif
6346
6347                         if (stcb->asoc.asconf_supported == 0) {
6348                                 return (-100);
6349                         }
6350                         if (plen > sizeof(lstore)) {
6351                                 return (-23);
6352                         }
6353                         if (plen < sizeof(struct sctp_asconf_addrv4_param)) {
6354                                 return (-101);
6355                         }
6356                         phdr = sctp_get_next_param(m, offset,
6357                             (struct sctp_paramhdr *)&lstore,
6358                             plen);
6359                         if (phdr == NULL) {
6360                                 return (-24);
6361                         }
6362                         fee = (struct sctp_asconf_addr_param *)phdr;
6363                         lptype = ntohs(fee->addrp.ph.param_type);
6364                         switch (lptype) {
6365 #ifdef INET
6366                         case SCTP_IPV4_ADDRESS:
6367                                 if (plen !=
6368                                     sizeof(struct sctp_asconf_addrv4_param)) {
6369                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6370                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6371                                             plen);
6372                                 } else {
6373                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6374                                         sin.sin_addr.s_addr = fii->addrp.addr;
6375                                         lsa = (struct sockaddr *)&sin;
6376                                 }
6377                                 break;
6378 #endif
6379 #ifdef INET6
6380                         case SCTP_IPV6_ADDRESS:
6381                                 if (plen !=
6382                                     sizeof(struct sctp_asconf_addr_param)) {
6383                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6384                                             (int)sizeof(struct sctp_asconf_addr_param),
6385                                             plen);
6386                                 } else {
6387                                         memcpy(sin6.sin6_addr.s6_addr,
6388                                             fee->addrp.addr,
6389                                             sizeof(fee->addrp.addr));
6390                                         lsa = (struct sockaddr *)&sin6;
6391                                 }
6392                                 break;
6393 #endif
6394                         default:
6395                                 break;
6396                         }
6397                         if (lsa) {
6398                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6399                         }
6400                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6401                         stcb->asoc.peer_supports_nat = 1;
6402                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6403                         /* Peer supports pr-sctp */
6404                         peer_supports_prsctp = 1;
6405                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6406                         /* A supported extension chunk */
6407                         struct sctp_supported_chunk_types_param *pr_supported;
6408                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6409                         int num_ent, i;
6410
6411                         if (plen > sizeof(local_store)) {
6412                                 return (-35);
6413                         }
6414                         phdr = sctp_get_next_param(m, offset,
6415                             (struct sctp_paramhdr *)&local_store, plen);
6416                         if (phdr == NULL) {
6417                                 return (-25);
6418                         }
6419                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6420                         num_ent = plen - sizeof(struct sctp_paramhdr);
6421                         for (i = 0; i < num_ent; i++) {
6422                                 switch (pr_supported->chunk_types[i]) {
6423                                 case SCTP_ASCONF:
6424                                         peer_supports_asconf = 1;
6425                                         break;
6426                                 case SCTP_ASCONF_ACK:
6427                                         peer_supports_asconf_ack = 1;
6428                                         break;
6429                                 case SCTP_FORWARD_CUM_TSN:
6430                                         peer_supports_prsctp = 1;
6431                                         break;
6432                                 case SCTP_PACKET_DROPPED:
6433                                         peer_supports_pktdrop = 1;
6434                                         break;
6435                                 case SCTP_NR_SELECTIVE_ACK:
6436                                         peer_supports_nrsack = 1;
6437                                         break;
6438                                 case SCTP_STREAM_RESET:
6439                                         peer_supports_reconfig = 1;
6440                                         break;
6441                                 case SCTP_AUTHENTICATION:
6442                                         peer_supports_auth = 1;
6443                                         break;
6444                                 case SCTP_IDATA:
6445                                         peer_supports_idata = 1;
6446                                         break;
6447                                 default:
6448                                         /* one I have not learned yet */
6449                                         break;
6450                                 }
6451                         }
6452                 } else if (ptype == SCTP_RANDOM) {
6453                         if (plen > sizeof(random_store))
6454                                 break;
6455                         if (got_random) {
6456                                 /* already processed a RANDOM */
6457                                 goto next_param;
6458                         }
6459                         phdr = sctp_get_next_param(m, offset,
6460                             (struct sctp_paramhdr *)random_store,
6461                             plen);
6462                         if (phdr == NULL)
6463                                 return (-26);
6464                         p_random = (struct sctp_auth_random *)phdr;
6465                         random_len = plen - sizeof(*p_random);
6466                         /* enforce the random length */
6467                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6468                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6469                                 return (-27);
6470                         }
6471                         got_random = 1;
6472                 } else if (ptype == SCTP_HMAC_LIST) {
6473                         uint16_t num_hmacs;
6474                         uint16_t i;
6475
6476                         if (plen > sizeof(hmacs_store))
6477                                 break;
6478                         if (got_hmacs) {
6479                                 /* already processed a HMAC list */
6480                                 goto next_param;
6481                         }
6482                         phdr = sctp_get_next_param(m, offset,
6483                             (struct sctp_paramhdr *)hmacs_store,
6484                             plen);
6485                         if (phdr == NULL)
6486                                 return (-28);
6487                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6488                         hmacs_len = plen - sizeof(*hmacs);
6489                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6490                         /* validate the hmac list */
6491                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6492                                 return (-29);
6493                         }
6494                         if (stcb->asoc.peer_hmacs != NULL)
6495                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6496                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6497                         if (stcb->asoc.peer_hmacs != NULL) {
6498                                 for (i = 0; i < num_hmacs; i++) {
6499                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6500                                             ntohs(hmacs->hmac_ids[i]));
6501                                 }
6502                         }
6503                         got_hmacs = 1;
6504                 } else if (ptype == SCTP_CHUNK_LIST) {
6505                         int i;
6506
6507                         if (plen > sizeof(chunks_store))
6508                                 break;
6509                         if (got_chklist) {
6510                                 /* already processed a Chunks list */
6511                                 goto next_param;
6512                         }
6513                         phdr = sctp_get_next_param(m, offset,
6514                             (struct sctp_paramhdr *)chunks_store,
6515                             plen);
6516                         if (phdr == NULL)
6517                                 return (-30);
6518                         chunks = (struct sctp_auth_chunk_list *)phdr;
6519                         num_chunks = plen - sizeof(*chunks);
6520                         if (stcb->asoc.peer_auth_chunks != NULL)
6521                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6522                         else
6523                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6524                         for (i = 0; i < num_chunks; i++) {
6525                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6526                                     stcb->asoc.peer_auth_chunks);
6527                                 /* record asconf/asconf-ack if listed */
6528                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6529                                         saw_asconf = 1;
6530                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6531                                         saw_asconf_ack = 1;
6532                         }
6533                         got_chklist = 1;
6534                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6535                             (ptype == SCTP_STATE_COOKIE) ||
6536                             (ptype == SCTP_UNRECOG_PARAM) ||
6537                             (ptype == SCTP_COOKIE_PRESERVE) ||
6538                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6539                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6540                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6541                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6542                     (ptype == SCTP_SUCCESS_REPORT)) {
6543                         /* don't care */
6544                 } else {
6545                         if ((ptype & 0x8000) == 0x0000) {
6546                                 /*
6547                                  * must stop processing the rest of the
6548                                  * param's. Any report bits were handled
6549                                  * with the call to
6550                                  * sctp_arethere_unrecognized_parameters()
6551                                  * when the INIT or INIT-ACK was first seen.
6552                                  */
6553                                 break;
6554                         }
6555                 }
6556
6557 next_param:
6558                 offset += SCTP_SIZE32(plen);
6559                 if (offset >= limit) {
6560                         break;
6561                 }
6562                 phdr = sctp_get_next_param(m, offset, &param_buf,
6563                     sizeof(param_buf));
6564         }
6565         /* Now check to see if we need to purge any addresses */
6566         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6567                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6568                     SCTP_ADDR_NOT_IN_ASSOC) {
6569                         /* This address has been removed from the asoc */
6570                         /* remove and free it */
6571                         stcb->asoc.numnets--;
6572                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6573                         if (net == stcb->asoc.alternate) {
6574                                 sctp_free_remote_addr(stcb->asoc.alternate);
6575                                 stcb->asoc.alternate = NULL;
6576                         }
6577                         if (net == stcb->asoc.primary_destination) {
6578                                 stcb->asoc.primary_destination = NULL;
6579                                 sctp_select_primary_destination(stcb);
6580                         }
6581                         sctp_free_remote_addr(net);
6582                 }
6583         }
6584         if ((stcb->asoc.ecn_supported == 1) &&
6585             (peer_supports_ecn == 0)) {
6586                 stcb->asoc.ecn_supported = 0;
6587         }
6588         if ((stcb->asoc.prsctp_supported == 1) &&
6589             (peer_supports_prsctp == 0)) {
6590                 stcb->asoc.prsctp_supported = 0;
6591         }
6592         if ((stcb->asoc.auth_supported == 1) &&
6593             ((peer_supports_auth == 0) ||
6594             (got_random == 0) || (got_hmacs == 0))) {
6595                 stcb->asoc.auth_supported = 0;
6596         }
6597         if ((stcb->asoc.asconf_supported == 1) &&
6598             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6599             (stcb->asoc.auth_supported == 0) ||
6600             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6601                 stcb->asoc.asconf_supported = 0;
6602         }
6603         if ((stcb->asoc.reconfig_supported == 1) &&
6604             (peer_supports_reconfig == 0)) {
6605                 stcb->asoc.reconfig_supported = 0;
6606         }
6607         if ((stcb->asoc.idata_supported == 1) &&
6608             (peer_supports_idata == 0)) {
6609                 stcb->asoc.idata_supported = 0;
6610         }
6611         if ((stcb->asoc.nrsack_supported == 1) &&
6612             (peer_supports_nrsack == 0)) {
6613                 stcb->asoc.nrsack_supported = 0;
6614         }
6615         if ((stcb->asoc.pktdrop_supported == 1) &&
6616             (peer_supports_pktdrop == 0)) {
6617                 stcb->asoc.pktdrop_supported = 0;
6618         }
6619         /* validate authentication required parameters */
6620         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6621                 /* peer does not support auth but sent a chunks list? */
6622                 return (-31);
6623         }
6624         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6625                 /* peer supports asconf but not auth? */
6626                 return (-32);
6627         } else if ((peer_supports_asconf == 1) &&
6628                     (peer_supports_auth == 1) &&
6629             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6630                 return (-33);
6631         }
6632         /* concatenate the full random key */
6633         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6634         if (chunks != NULL) {
6635                 keylen += sizeof(*chunks) + num_chunks;
6636         }
6637         new_key = sctp_alloc_key(keylen);
6638         if (new_key != NULL) {
6639                 /* copy in the RANDOM */
6640                 if (p_random != NULL) {
6641                         keylen = sizeof(*p_random) + random_len;
6642                         memcpy(new_key->key, p_random, keylen);
6643                 } else {
6644                         keylen = 0;
6645                 }
6646                 /* append in the AUTH chunks */
6647                 if (chunks != NULL) {
6648                         memcpy(new_key->key + keylen, chunks,
6649                             sizeof(*chunks) + num_chunks);
6650                         keylen += sizeof(*chunks) + num_chunks;
6651                 }
6652                 /* append in the HMACs */
6653                 if (hmacs != NULL) {
6654                         memcpy(new_key->key + keylen, hmacs,
6655                             sizeof(*hmacs) + hmacs_len);
6656                 }
6657         } else {
6658                 /* failed to get memory for the key */
6659                 return (-34);
6660         }
6661         if (stcb->asoc.authinfo.peer_random != NULL)
6662                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6663         stcb->asoc.authinfo.peer_random = new_key;
6664         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6665         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6666
6667         return (0);
6668 }
6669
6670 int
6671 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6672     struct sctp_nets *net)
6673 {
6674         /* make sure the requested primary address exists in the assoc */
6675         if (net == NULL && sa)
6676                 net = sctp_findnet(stcb, sa);
6677
6678         if (net == NULL) {
6679                 /* didn't find the requested primary address! */
6680                 return (-1);
6681         } else {
6682                 /* set the primary address */
6683                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6684                         /* Must be confirmed, so queue to set */
6685                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6686                         return (0);
6687                 }
6688                 stcb->asoc.primary_destination = net;
6689                 if (((net->dest_state & SCTP_ADDR_PF) == 0) &&
6690                     (stcb->asoc.alternate != NULL)) {
6691                         sctp_free_remote_addr(stcb->asoc.alternate);
6692                         stcb->asoc.alternate = NULL;
6693                 }
6694                 net = TAILQ_FIRST(&stcb->asoc.nets);
6695                 if (net != stcb->asoc.primary_destination) {
6696                         /*
6697                          * first one on the list is NOT the primary
6698                          * sctp_cmpaddr() is much more efficient if the
6699                          * primary is the first on the list, make it so.
6700                          */
6701                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6702                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6703                 }
6704                 return (0);
6705         }
6706 }
6707
6708 bool
6709 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6710 {
6711         struct sctpasochead *head;
6712         struct sctp_tcb *stcb;
6713
6714         SCTP_INP_INFO_LOCK_ASSERT();
6715
6716         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, SCTP_BASE_INFO(hashasocmark))];
6717         LIST_FOREACH(stcb, head, sctp_asocs) {
6718                 /*
6719                  * We choose not to lock anything here. TCB's can't be
6720                  * removed since we have the read lock, so they can't be
6721                  * freed on us, same thing for the INP. I may be wrong with
6722                  * this assumption, but we will go with it for now :-)
6723                  */
6724                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6725                         continue;
6726                 }
6727                 if (stcb->asoc.my_vtag == tag) {
6728                         /* candidate */
6729                         if (stcb->rport != rport) {
6730                                 continue;
6731                         }
6732                         if (stcb->sctp_ep->sctp_lport != lport) {
6733                                 continue;
6734                         }
6735                         /* The tag is currently used, so don't use it. */
6736                         return (false);
6737                 }
6738         }
6739         return (!sctp_is_in_timewait(tag, lport, rport, (uint32_t)now->tv_sec));
6740 }
6741
6742 static void
6743 sctp_drain_mbufs(struct sctp_tcb *stcb)
6744 {
6745         /*
6746          * We must hunt this association for MBUF's past the cumack (i.e.
6747          * out of order data that we can renege on).
6748          */
6749         struct sctp_association *asoc;
6750         struct sctp_tmit_chunk *chk, *nchk;
6751         uint32_t cumulative_tsn_p1;
6752         struct sctp_queued_to_read *control, *ncontrol;
6753         int cnt, strmat;
6754         uint32_t gap, i;
6755         int fnd = 0;
6756
6757         /* We look for anything larger than the cum-ack + 1 */
6758
6759         asoc = &stcb->asoc;
6760         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6761                 /* none we can reneg on. */
6762                 return;
6763         }
6764         SCTP_STAT_INCR(sctps_protocol_drains_done);
6765         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6766         cnt = 0;
6767         /* Ok that was fun, now we will drain all the inbound streams? */
6768         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6769                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) {
6770 #ifdef INVARIANTS
6771                         if (control->on_strm_q != SCTP_ON_ORDERED) {
6772                                 panic("Huh control: %p on_q: %d -- not ordered?",
6773                                     control, control->on_strm_q);
6774                         }
6775 #endif
6776                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6777                                 /* Yep it is above cum-ack */
6778                                 cnt++;
6779                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6780                                 KASSERT(control->length > 0, ("control has zero length"));
6781                                 if (asoc->size_on_all_streams >= control->length) {
6782                                         asoc->size_on_all_streams -= control->length;
6783                                 } else {
6784 #ifdef INVARIANTS
6785                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6786 #else
6787                                         asoc->size_on_all_streams = 0;
6788 #endif
6789                                 }
6790                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6791                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6792                                 if (control->on_read_q) {
6793                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6794                                         control->on_read_q = 0;
6795                                 }
6796                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm);
6797                                 control->on_strm_q = 0;
6798                                 if (control->data) {
6799                                         sctp_m_freem(control->data);
6800                                         control->data = NULL;
6801                                 }
6802                                 sctp_free_remote_addr(control->whoFrom);
6803                                 /* Now its reasm? */
6804                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6805                                         cnt++;
6806                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6807                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6808                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6809                                                 asoc->size_on_reasm_queue -= chk->send_size;
6810                                         } else {
6811 #ifdef INVARIANTS
6812                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6813 #else
6814                                                 asoc->size_on_reasm_queue = 0;
6815 #endif
6816                                         }
6817                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6818                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6819                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6820                                         if (chk->data) {
6821                                                 sctp_m_freem(chk->data);
6822                                                 chk->data = NULL;
6823                                         }
6824                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6825                                 }
6826                                 sctp_free_a_readq(stcb, control);
6827                         }
6828                 }
6829                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) {
6830 #ifdef INVARIANTS
6831                         if (control->on_strm_q != SCTP_ON_UNORDERED) {
6832                                 panic("Huh control: %p on_q: %d -- not unordered?",
6833                                     control, control->on_strm_q);
6834                         }
6835 #endif
6836                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6837                                 /* Yep it is above cum-ack */
6838                                 cnt++;
6839                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6840                                 KASSERT(control->length > 0, ("control has zero length"));
6841                                 if (asoc->size_on_all_streams >= control->length) {
6842                                         asoc->size_on_all_streams -= control->length;
6843                                 } else {
6844 #ifdef INVARIANTS
6845                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6846 #else
6847                                         asoc->size_on_all_streams = 0;
6848 #endif
6849                                 }
6850                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6851                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6852                                 if (control->on_read_q) {
6853                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6854                                         control->on_read_q = 0;
6855                                 }
6856                                 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm);
6857                                 control->on_strm_q = 0;
6858                                 if (control->data) {
6859                                         sctp_m_freem(control->data);
6860                                         control->data = NULL;
6861                                 }
6862                                 sctp_free_remote_addr(control->whoFrom);
6863                                 /* Now its reasm? */
6864                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6865                                         cnt++;
6866                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6867                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6868                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6869                                                 asoc->size_on_reasm_queue -= chk->send_size;
6870                                         } else {
6871 #ifdef INVARIANTS
6872                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6873 #else
6874                                                 asoc->size_on_reasm_queue = 0;
6875 #endif
6876                                         }
6877                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6878                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6879                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6880                                         if (chk->data) {
6881                                                 sctp_m_freem(chk->data);
6882                                                 chk->data = NULL;
6883                                         }
6884                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6885                                 }
6886                                 sctp_free_a_readq(stcb, control);
6887                         }
6888                 }
6889         }
6890         if (cnt) {
6891                 /* We must back down to see what the new highest is */
6892                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6893                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6894                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6895                                 asoc->highest_tsn_inside_map = i;
6896                                 fnd = 1;
6897                                 break;
6898                         }
6899                 }
6900                 if (!fnd) {
6901                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6902                 }
6903
6904                 /*
6905                  * Question, should we go through the delivery queue? The
6906                  * only reason things are on here is the app not reading OR
6907                  * a p-d-api up. An attacker COULD send enough in to
6908                  * initiate the PD-API and then send a bunch of stuff to
6909                  * other streams... these would wind up on the delivery
6910                  * queue.. and then we would not get to them. But in order
6911                  * to do this I then have to back-track and un-deliver
6912                  * sequence numbers in streams.. el-yucko. I think for now
6913                  * we will NOT look at the delivery queue and leave it to be
6914                  * something to consider later. An alternative would be to
6915                  * abort the P-D-API with a notification and then deliver
6916                  * the data.... Or another method might be to keep track of
6917                  * how many times the situation occurs and if we see a
6918                  * possible attack underway just abort the association.
6919                  */
6920 #ifdef SCTP_DEBUG
6921                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6922 #endif
6923                 /*
6924                  * Now do we need to find a new
6925                  * asoc->highest_tsn_inside_map?
6926                  */
6927                 asoc->last_revoke_count = cnt;
6928                 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
6929                     SCTP_FROM_SCTP_PCB + SCTP_LOC_11);
6930                 /* sa_ignore NO_NULL_CHK */
6931                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6932                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6933         }
6934         /*
6935          * Another issue, in un-setting the TSN's in the mapping array we
6936          * DID NOT adjust the highest_tsn marker.  This will cause one of
6937          * two things to occur. It may cause us to do extra work in checking
6938          * for our mapping array movement. More importantly it may cause us
6939          * to SACK every datagram. This may not be a bad thing though since
6940          * we will recover once we get our cum-ack above and all this stuff
6941          * we dumped recovered.
6942          */
6943 }
6944
6945 static void
6946 sctp_drain(void)
6947 {
6948         struct epoch_tracker et;
6949
6950         VNET_ITERATOR_DECL(vnet_iter);
6951
6952         NET_EPOCH_ENTER(et);
6953         /*
6954          * We must walk the PCB lists for ALL associations here. The system
6955          * is LOW on MBUF's and needs help. This is where reneging will
6956          * occur. We really hope this does NOT happen!
6957          */
6958         VNET_LIST_RLOCK_NOSLEEP();
6959         VNET_FOREACH(vnet_iter) {
6960                 CURVNET_SET(vnet_iter);
6961                 struct sctp_inpcb *inp;
6962                 struct sctp_tcb *stcb;
6963
6964                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6965                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6966 #ifdef VIMAGE
6967                         continue;
6968 #else
6969                         NET_EPOCH_EXIT(et);
6970                         return;
6971 #endif
6972                 }
6973                 SCTP_INP_INFO_RLOCK();
6974                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6975                         /* For each endpoint */
6976                         SCTP_INP_RLOCK(inp);
6977                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6978                                 /* For each association */
6979                                 SCTP_TCB_LOCK(stcb);
6980                                 sctp_drain_mbufs(stcb);
6981                                 SCTP_TCB_UNLOCK(stcb);
6982                         }
6983                         SCTP_INP_RUNLOCK(inp);
6984                 }
6985                 SCTP_INP_INFO_RUNLOCK();
6986                 CURVNET_RESTORE();
6987         }
6988         VNET_LIST_RUNLOCK_NOSLEEP();
6989         NET_EPOCH_EXIT(et);
6990 }
6991
6992 EVENTHANDLER_DEFINE(vm_lowmem, sctp_drain, NULL, LOWMEM_PRI_DEFAULT);
6993 EVENTHANDLER_DEFINE(mbuf_lowmem, sctp_drain, NULL, LOWMEM_PRI_DEFAULT);
6994
6995 /*
6996  * start a new iterator
6997  * iterates through all endpoints and associations based on the pcb_state
6998  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6999  * assocs and "ef" (optional) is executed when the iterator completes.
7000  * "inpf" (optional) is executed for each new endpoint as it is being
7001  * iterated through. inpe (optional) is called when the inp completes
7002  * its way through all the stcbs.
7003  */
7004 int
7005 sctp_initiate_iterator(inp_func inpf,
7006     asoc_func af,
7007     inp_func inpe,
7008     uint32_t pcb_state,
7009     uint32_t pcb_features,
7010     uint32_t asoc_state,
7011     void *argp,
7012     uint32_t argi,
7013     end_func ef,
7014     struct sctp_inpcb *s_inp,
7015     uint8_t chunk_output_off)
7016 {
7017         struct sctp_iterator *it = NULL;
7018
7019         if (af == NULL) {
7020                 return (-1);
7021         }
7022         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7023                 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7024                     SCTP_BASE_VAR(sctp_pcb_initialized));
7025                 return (-1);
7026         }
7027         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7028             SCTP_M_ITER);
7029         if (it == NULL) {
7030                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7031                 return (-1);
7032         }
7033         memset(it, 0, sizeof(*it));
7034         it->function_assoc = af;
7035         it->function_inp = inpf;
7036         if (inpf)
7037                 it->done_current_ep = 0;
7038         else
7039                 it->done_current_ep = 1;
7040         it->function_atend = ef;
7041         it->pointer = argp;
7042         it->val = argi;
7043         it->pcb_flags = pcb_state;
7044         it->pcb_features = pcb_features;
7045         it->asoc_state = asoc_state;
7046         it->function_inp_end = inpe;
7047         it->no_chunk_output = chunk_output_off;
7048         it->vn = curvnet;
7049         if (s_inp) {
7050                 /* Assume lock is held here */
7051                 it->inp = s_inp;
7052                 SCTP_INP_INCR_REF(it->inp);
7053                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7054         } else {
7055                 SCTP_INP_INFO_RLOCK();
7056                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7057                 if (it->inp) {
7058                         SCTP_INP_INCR_REF(it->inp);
7059                 }
7060                 SCTP_INP_INFO_RUNLOCK();
7061                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7062         }
7063         SCTP_IPI_ITERATOR_WQ_LOCK();
7064         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7065                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7066                 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7067                     SCTP_BASE_VAR(sctp_pcb_initialized), it);
7068                 SCTP_FREE(it, SCTP_M_ITER);
7069                 return (-1);
7070         }
7071         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7072         if (sctp_it_ctl.iterator_running == 0) {
7073                 sctp_wakeup_iterator();
7074         }
7075         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7076         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7077         return (0);
7078 }
7079
7080 /*
7081  * Atomically add flags to the sctp_flags of an inp.
7082  * To be used when the write lock of the inp is not held.
7083  */
7084 void
7085 sctp_pcb_add_flags(struct sctp_inpcb *inp, uint32_t flags)
7086 {
7087         uint32_t old_flags, new_flags;
7088
7089         do {
7090                 old_flags = inp->sctp_flags;
7091                 new_flags = old_flags | flags;
7092         } while (atomic_cmpset_int(&inp->sctp_flags, old_flags, new_flags) == 0);
7093 }