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, addr->sa_family);
 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 == NULL) {
1550                 SCTP_PRINTF("TSNH ep_associd\n");
1551                 return (NULL);
1552         }
1553         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1554                 SCTP_PRINTF("TSNH ep_associd0\n");
1555                 return (NULL);
1556         }
1557         id = (uint32_t)asoc_id;
1558         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1559         if (head == NULL) {
1560                 /* invalid id TSNH */
1561                 SCTP_PRINTF("TSNH ep_associd1\n");
1562                 return (NULL);
1563         }
1564         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1565                 if (stcb->asoc.assoc_id == id) {
1566                         if (inp != stcb->sctp_ep) {
1567                                 /*
1568                                  * some other guy has the same id active (id
1569                                  * collision ??).
1570                                  */
1571                                 SCTP_PRINTF("TSNH ep_associd2\n");
1572                                 continue;
1573                         }
1574                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1575                                 continue;
1576                         }
1577                         if (want_lock) {
1578                                 SCTP_TCB_LOCK(stcb);
1579                         }
1580                         return (stcb);
1581                 }
1582         }
1583         return (NULL);
1584 }
1585
1586 struct sctp_tcb *
1587 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1588 {
1589         struct sctp_tcb *stcb;
1590
1591         SCTP_INP_RLOCK(inp);
1592         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1593         SCTP_INP_RUNLOCK(inp);
1594         return (stcb);
1595 }
1596
1597 /*
1598  * Endpoint probe expects that the INP_INFO is locked.
1599  */
1600 static struct sctp_inpcb *
1601 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1602     uint16_t lport, uint32_t vrf_id)
1603 {
1604         struct sctp_inpcb *inp;
1605         struct sctp_laddr *laddr;
1606 #ifdef INET
1607         struct sockaddr_in *sin;
1608 #endif
1609 #ifdef INET6
1610         struct sockaddr_in6 *sin6;
1611         struct sockaddr_in6 *intf_addr6;
1612 #endif
1613         int fnd;
1614
1615 #ifdef INET
1616         sin = NULL;
1617 #endif
1618 #ifdef INET6
1619         sin6 = NULL;
1620 #endif
1621         switch (nam->sa_family) {
1622 #ifdef INET
1623         case AF_INET:
1624                 sin = (struct sockaddr_in *)nam;
1625                 break;
1626 #endif
1627 #ifdef INET6
1628         case AF_INET6:
1629                 sin6 = (struct sockaddr_in6 *)nam;
1630                 break;
1631 #endif
1632         default:
1633                 /* unsupported family */
1634                 return (NULL);
1635         }
1636
1637         if (head == NULL)
1638                 return (NULL);
1639
1640         LIST_FOREACH(inp, head, sctp_hash) {
1641                 SCTP_INP_RLOCK(inp);
1642                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1643                         SCTP_INP_RUNLOCK(inp);
1644                         continue;
1645                 }
1646                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1647                     (inp->sctp_lport == lport)) {
1648                         /* got it */
1649                         switch (nam->sa_family) {
1650 #ifdef INET
1651                         case AF_INET:
1652                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1653                                     SCTP_IPV6_V6ONLY(inp)) {
1654                                         /*
1655                                          * IPv4 on a IPv6 socket with ONLY
1656                                          * IPv6 set
1657                                          */
1658                                         SCTP_INP_RUNLOCK(inp);
1659                                         continue;
1660                                 }
1661                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1662                                     &sin->sin_addr) != 0) {
1663                                         SCTP_INP_RUNLOCK(inp);
1664                                         continue;
1665                                 }
1666                                 break;
1667 #endif
1668 #ifdef INET6
1669                         case AF_INET6:
1670                                 /*
1671                                  * A V6 address and the endpoint is NOT
1672                                  * bound V6
1673                                  */
1674                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1675                                         SCTP_INP_RUNLOCK(inp);
1676                                         continue;
1677                                 }
1678                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1679                                     &sin6->sin6_addr) != 0) {
1680                                         SCTP_INP_RUNLOCK(inp);
1681                                         continue;
1682                                 }
1683                                 break;
1684 #endif
1685                         default:
1686                                 break;
1687                         }
1688                         /* does a VRF id match? */
1689                         fnd = 0;
1690                         if (inp->def_vrf_id == vrf_id)
1691                                 fnd = 1;
1692
1693                         SCTP_INP_RUNLOCK(inp);
1694                         if (!fnd)
1695                                 continue;
1696                         return (inp);
1697                 }
1698                 SCTP_INP_RUNLOCK(inp);
1699         }
1700         switch (nam->sa_family) {
1701 #ifdef INET
1702         case AF_INET:
1703                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1704                         /* Can't hunt for one that has no address specified */
1705                         return (NULL);
1706                 }
1707                 break;
1708 #endif
1709 #ifdef INET6
1710         case AF_INET6:
1711                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1712                         /* Can't hunt for one that has no address specified */
1713                         return (NULL);
1714                 }
1715                 break;
1716 #endif
1717         default:
1718                 break;
1719         }
1720         /*
1721          * ok, not bound to all so see if we can find a EP bound to this
1722          * address.
1723          */
1724         LIST_FOREACH(inp, head, sctp_hash) {
1725                 SCTP_INP_RLOCK(inp);
1726                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1727                         SCTP_INP_RUNLOCK(inp);
1728                         continue;
1729                 }
1730                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1731                         SCTP_INP_RUNLOCK(inp);
1732                         continue;
1733                 }
1734                 /*
1735                  * Ok this could be a likely candidate, look at all of its
1736                  * addresses
1737                  */
1738                 if (inp->sctp_lport != lport) {
1739                         SCTP_INP_RUNLOCK(inp);
1740                         continue;
1741                 }
1742                 /* does a VRF id match? */
1743                 fnd = 0;
1744                 if (inp->def_vrf_id == vrf_id)
1745                         fnd = 1;
1746
1747                 if (!fnd) {
1748                         SCTP_INP_RUNLOCK(inp);
1749                         continue;
1750                 }
1751                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1752                         if (laddr->ifa == NULL) {
1753                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1754                                     __func__);
1755                                 continue;
1756                         }
1757                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1758                             (void *)laddr->ifa);
1759                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1760                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1761                                 continue;
1762                         }
1763                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1764                                 /* possible, see if it matches */
1765                                 switch (nam->sa_family) {
1766 #ifdef INET
1767                                 case AF_INET:
1768                                         if (sin->sin_addr.s_addr ==
1769                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1770                                                 SCTP_INP_RUNLOCK(inp);
1771                                                 return (inp);
1772                                         }
1773                                         break;
1774 #endif
1775 #ifdef INET6
1776                                 case AF_INET6:
1777                                         intf_addr6 = &laddr->ifa->address.sin6;
1778                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1779                                             intf_addr6)) {
1780                                                 SCTP_INP_RUNLOCK(inp);
1781                                                 return (inp);
1782                                         }
1783                                         break;
1784 #endif
1785                                 }
1786                         }
1787                 }
1788                 SCTP_INP_RUNLOCK(inp);
1789         }
1790         return (NULL);
1791 }
1792
1793 static struct sctp_inpcb *
1794 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1795 {
1796         struct sctppcbhead *head;
1797         struct sctp_inpcb *t_inp;
1798         int fnd;
1799
1800         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1801             SCTP_BASE_INFO(hashmark))];
1802         LIST_FOREACH(t_inp, head, sctp_hash) {
1803                 if (t_inp->sctp_lport != lport) {
1804                         continue;
1805                 }
1806                 /* is it in the VRF in question */
1807                 fnd = 0;
1808                 if (t_inp->def_vrf_id == vrf_id)
1809                         fnd = 1;
1810                 if (!fnd)
1811                         continue;
1812
1813                 /* This one is in use. */
1814                 /* check the v6/v4 binding issue */
1815                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1816                     SCTP_IPV6_V6ONLY(t_inp)) {
1817                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1818                                 /* collision in V6 space */
1819                                 return (t_inp);
1820                         } else {
1821                                 /* inp is BOUND_V4 no conflict */
1822                                 continue;
1823                         }
1824                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1825                         /* t_inp is bound v4 and v6, conflict always */
1826                         return (t_inp);
1827                 } else {
1828                         /* t_inp is bound only V4 */
1829                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1830                             SCTP_IPV6_V6ONLY(inp)) {
1831                                 /* no conflict */
1832                                 continue;
1833                         }
1834                         /* else fall through to conflict */
1835                 }
1836                 return (t_inp);
1837         }
1838         return (NULL);
1839 }
1840
1841 int
1842 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1843 {
1844         /* For 1-2-1 with port reuse */
1845         struct sctppcbhead *head;
1846         struct sctp_inpcb *tinp, *ninp;
1847
1848         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1849                 /* only works with port reuse on */
1850                 return (-1);
1851         }
1852         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1853                 return (0);
1854         }
1855         SCTP_INP_RUNLOCK(inp);
1856         SCTP_INP_INFO_WLOCK();
1857         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1858             SCTP_BASE_INFO(hashmark))];
1859         /* Kick out all non-listeners to the TCP hash */
1860         LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1861                 if (tinp->sctp_lport != inp->sctp_lport) {
1862                         continue;
1863                 }
1864                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1865                         continue;
1866                 }
1867                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1868                         continue;
1869                 }
1870                 if (SCTP_IS_LISTENING(tinp)) {
1871                         continue;
1872                 }
1873                 SCTP_INP_WLOCK(tinp);
1874                 LIST_REMOVE(tinp, sctp_hash);
1875                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1876                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1877                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1878                 SCTP_INP_WUNLOCK(tinp);
1879         }
1880         SCTP_INP_WLOCK(inp);
1881         /* Pull from where he was */
1882         LIST_REMOVE(inp, sctp_hash);
1883         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1884         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1885         LIST_INSERT_HEAD(head, inp, sctp_hash);
1886         SCTP_INP_WUNLOCK(inp);
1887         SCTP_INP_RLOCK(inp);
1888         SCTP_INP_INFO_WUNLOCK();
1889         return (0);
1890 }
1891
1892 struct sctp_inpcb *
1893 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1894     uint32_t vrf_id)
1895 {
1896         /*
1897          * First we check the hash table to see if someone has this port
1898          * bound with just the port.
1899          */
1900         struct sctp_inpcb *inp;
1901         struct sctppcbhead *head;
1902         int lport;
1903         unsigned int i;
1904 #ifdef INET
1905         struct sockaddr_in *sin;
1906 #endif
1907 #ifdef INET6
1908         struct sockaddr_in6 *sin6;
1909 #endif
1910
1911         switch (nam->sa_family) {
1912 #ifdef INET
1913         case AF_INET:
1914                 sin = (struct sockaddr_in *)nam;
1915                 lport = sin->sin_port;
1916                 break;
1917 #endif
1918 #ifdef INET6
1919         case AF_INET6:
1920                 sin6 = (struct sockaddr_in6 *)nam;
1921                 lport = sin6->sin6_port;
1922                 break;
1923 #endif
1924         default:
1925                 return (NULL);
1926         }
1927         /*
1928          * I could cheat here and just cast to one of the types but we will
1929          * do it right. It also provides the check against an Unsupported
1930          * type too.
1931          */
1932         /* Find the head of the ALLADDR chain */
1933         if (have_lock == 0) {
1934                 SCTP_INP_INFO_RLOCK();
1935         }
1936         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1937             SCTP_BASE_INFO(hashmark))];
1938         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1939
1940         /*
1941          * If the TCP model exists it could be that the main listening
1942          * endpoint is gone but there still exists a connected socket for
1943          * this guy. If so we can return the first one that we find. This
1944          * may NOT be the correct one so the caller should be wary on the
1945          * returned INP. Currently the only caller that sets find_tcp_pool
1946          * is in bindx where we are verifying that a user CAN bind the
1947          * address. He either has bound it already, or someone else has, or
1948          * its open to bind, so this is good enough.
1949          */
1950         if (inp == NULL && find_tcp_pool) {
1951                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1952                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1953                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1954                         if (inp) {
1955                                 break;
1956                         }
1957                 }
1958         }
1959         if (inp) {
1960                 SCTP_INP_INCR_REF(inp);
1961         }
1962         if (have_lock == 0) {
1963                 SCTP_INP_INFO_RUNLOCK();
1964         }
1965         return (inp);
1966 }
1967
1968 /*
1969  * Find an association for an endpoint with the pointer to whom you want to
1970  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1971  * need to change the *to to some other struct like a mbuf...
1972  */
1973 struct sctp_tcb *
1974 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
1975     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1976     uint32_t vrf_id)
1977 {
1978         struct sctp_inpcb *inp = NULL;
1979         struct sctp_tcb *stcb;
1980
1981         SCTP_INP_INFO_RLOCK();
1982         if (find_tcp_pool) {
1983                 if (inp_p != NULL) {
1984                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
1985                             vrf_id);
1986                 } else {
1987                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
1988                             vrf_id);
1989                 }
1990                 if (stcb != NULL) {
1991                         SCTP_INP_INFO_RUNLOCK();
1992                         return (stcb);
1993                 }
1994         }
1995         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1996         if (inp_p != NULL) {
1997                 *inp_p = inp;
1998         }
1999         SCTP_INP_INFO_RUNLOCK();
2000         if (inp == NULL) {
2001                 return (NULL);
2002         }
2003         /*
2004          * ok, we have an endpoint, now lets find the assoc for it (if any)
2005          * we now place the source address or from in the to of the find
2006          * endpoint call. Since in reality this chain is used from the
2007          * inbound packet side.
2008          */
2009         if (inp_p != NULL) {
2010                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2011                     NULL);
2012         } else {
2013                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2014                     NULL);
2015         }
2016         return (stcb);
2017 }
2018
2019 /*
2020  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2021  * find all addresses that the sender has specified in any address list. Each
2022  * address will be used to lookup the TCB and see if one exits.
2023  */
2024 static struct sctp_tcb *
2025 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2026     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2027     struct sockaddr *dst)
2028 {
2029         struct sctp_paramhdr *phdr, param_buf;
2030 #if defined(INET) || defined(INET6)
2031         struct sctp_tcb *stcb;
2032         uint16_t ptype;
2033 #endif
2034         uint16_t plen;
2035 #ifdef INET
2036         struct sockaddr_in sin4;
2037 #endif
2038 #ifdef INET6
2039         struct sockaddr_in6 sin6;
2040 #endif
2041
2042 #ifdef INET
2043         memset(&sin4, 0, sizeof(sin4));
2044         sin4.sin_len = sizeof(sin4);
2045         sin4.sin_family = AF_INET;
2046         sin4.sin_port = sh->src_port;
2047 #endif
2048 #ifdef INET6
2049         memset(&sin6, 0, sizeof(sin6));
2050         sin6.sin6_len = sizeof(sin6);
2051         sin6.sin6_family = AF_INET6;
2052         sin6.sin6_port = sh->src_port;
2053 #endif
2054
2055         offset += sizeof(struct sctp_init_chunk);
2056
2057         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
2058         while (phdr != NULL) {
2059                 /* now we must see if we want the parameter */
2060 #if defined(INET) || defined(INET6)
2061                 ptype = ntohs(phdr->param_type);
2062 #endif
2063                 plen = ntohs(phdr->param_length);
2064                 if (plen == 0) {
2065                         break;
2066                 }
2067 #ifdef INET
2068                 if (ptype == SCTP_IPV4_ADDRESS &&
2069                     plen == sizeof(struct sctp_ipv4addr_param)) {
2070                         /* Get the rest of the address */
2071                         struct sctp_ipv4addr_param ip4_param, *p4;
2072
2073                         phdr = sctp_get_next_param(m, offset,
2074                             (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param));
2075                         if (phdr == NULL) {
2076                                 return (NULL);
2077                         }
2078                         p4 = (struct sctp_ipv4addr_param *)phdr;
2079                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2080                         /* look it up */
2081                         stcb = sctp_findassociation_ep_addr(inp_p,
2082                             (struct sockaddr *)&sin4, netp, dst, NULL);
2083                         if (stcb != NULL) {
2084                                 return (stcb);
2085                         }
2086                 }
2087 #endif
2088 #ifdef INET6
2089                 if (ptype == SCTP_IPV6_ADDRESS &&
2090                     plen == sizeof(struct sctp_ipv6addr_param)) {
2091                         /* Get the rest of the address */
2092                         struct sctp_ipv6addr_param ip6_param, *p6;
2093
2094                         phdr = sctp_get_next_param(m, offset,
2095                             (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param));
2096                         if (phdr == NULL) {
2097                                 return (NULL);
2098                         }
2099                         p6 = (struct sctp_ipv6addr_param *)phdr;
2100                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2101                         /* look it up */
2102                         stcb = sctp_findassociation_ep_addr(inp_p,
2103                             (struct sockaddr *)&sin6, netp, dst, NULL);
2104                         if (stcb != NULL) {
2105                                 return (stcb);
2106                         }
2107                 }
2108 #endif
2109                 offset += SCTP_SIZE32(plen);
2110                 phdr = sctp_get_next_param(m, offset, &param_buf,
2111                     sizeof(param_buf));
2112         }
2113         return (NULL);
2114 }
2115
2116 static struct sctp_tcb *
2117 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2118     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2119     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2120 {
2121         /*
2122          * Use my vtag to hash. If we find it we then verify the source addr
2123          * is in the assoc. If all goes well we save a bit on rec of a
2124          * packet.
2125          */
2126         struct sctpasochead *head;
2127         struct sctp_nets *net;
2128         struct sctp_tcb *stcb;
2129
2130         SCTP_INP_INFO_RLOCK();
2131         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2132             SCTP_BASE_INFO(hashasocmark))];
2133         LIST_FOREACH(stcb, head, sctp_asocs) {
2134                 SCTP_INP_RLOCK(stcb->sctp_ep);
2135                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2136                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2137                         continue;
2138                 }
2139                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2140                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2141                         continue;
2142                 }
2143                 SCTP_TCB_LOCK(stcb);
2144                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2145                 if (stcb->asoc.my_vtag == vtag) {
2146                         /* candidate */
2147                         if (stcb->rport != rport) {
2148                                 SCTP_TCB_UNLOCK(stcb);
2149                                 continue;
2150                         }
2151                         if (stcb->sctp_ep->sctp_lport != lport) {
2152                                 SCTP_TCB_UNLOCK(stcb);
2153                                 continue;
2154                         }
2155                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2156                                 SCTP_TCB_UNLOCK(stcb);
2157                                 continue;
2158                         }
2159                         /* RRS:Need toaddr check here */
2160                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2161                                 /* Endpoint does not own this address */
2162                                 SCTP_TCB_UNLOCK(stcb);
2163                                 continue;
2164                         }
2165                         if (remote_tag) {
2166                                 /*
2167                                  * If we have both vtags that's all we match
2168                                  * on
2169                                  */
2170                                 if (stcb->asoc.peer_vtag == remote_tag) {
2171                                         /*
2172                                          * If both tags match we consider it
2173                                          * conclusive and check NO
2174                                          * source/destination addresses
2175                                          */
2176                                         goto conclusive;
2177                                 }
2178                         }
2179                         if (skip_src_check) {
2180                 conclusive:
2181                                 if (from) {
2182                                         *netp = sctp_findnet(stcb, from);
2183                                 } else {
2184                                         *netp = NULL;   /* unknown */
2185                                 }
2186                                 if (inp_p)
2187                                         *inp_p = stcb->sctp_ep;
2188                                 SCTP_INP_INFO_RUNLOCK();
2189                                 return (stcb);
2190                         }
2191                         net = sctp_findnet(stcb, from);
2192                         if (net) {
2193                                 /* yep its him. */
2194                                 *netp = net;
2195                                 SCTP_STAT_INCR(sctps_vtagexpress);
2196                                 *inp_p = stcb->sctp_ep;
2197                                 SCTP_INP_INFO_RUNLOCK();
2198                                 return (stcb);
2199                         } else {
2200                                 /*
2201                                  * not him, this should only happen in rare
2202                                  * cases so I peg it.
2203                                  */
2204                                 SCTP_STAT_INCR(sctps_vtagbogus);
2205                         }
2206                 }
2207                 SCTP_TCB_UNLOCK(stcb);
2208         }
2209         SCTP_INP_INFO_RUNLOCK();
2210         return (NULL);
2211 }
2212
2213 /*
2214  * Find an association with the pointer to the inbound IP packet. This can be
2215  * a IPv4 or IPv6 packet.
2216  */
2217 struct sctp_tcb *
2218 sctp_findassociation_addr(struct mbuf *m, int offset,
2219     struct sockaddr *src, struct sockaddr *dst,
2220     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2221     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2222 {
2223         struct sctp_tcb *stcb;
2224         struct sctp_inpcb *inp;
2225
2226         if (sh->v_tag) {
2227                 /* we only go down this path if vtag is non-zero */
2228                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2229                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2230                 if (stcb) {
2231                         return (stcb);
2232                 }
2233         }
2234
2235         if (inp_p) {
2236                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2237                     1, vrf_id);
2238                 inp = *inp_p;
2239         } else {
2240                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2241                     1, vrf_id);
2242         }
2243         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2244         if (stcb == NULL && inp) {
2245                 /* Found a EP but not this address */
2246                 if ((ch->chunk_type == SCTP_INITIATION) ||
2247                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2248                         /*-
2249                          * special hook, we do NOT return linp or an
2250                          * association that is linked to an existing
2251                          * association that is under the TCP pool (i.e. no
2252                          * listener exists). The endpoint finding routine
2253                          * will always find a listener before examining the
2254                          * TCP pool.
2255                          */
2256                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2257                                 if (inp_p) {
2258                                         *inp_p = NULL;
2259                                 }
2260                                 return (NULL);
2261                         }
2262                         stcb = sctp_findassociation_special_addr(m,
2263                             offset, sh, &inp, netp, dst);
2264                         if (inp_p != NULL) {
2265                                 *inp_p = inp;
2266                         }
2267                 }
2268         }
2269         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2270         return (stcb);
2271 }
2272
2273 /*
2274  * lookup an association by an ASCONF lookup address.
2275  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2276  */
2277 struct sctp_tcb *
2278 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2279     struct sockaddr *dst, struct sctphdr *sh,
2280     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2281 {
2282         struct sctp_tcb *stcb;
2283         union sctp_sockstore remote_store;
2284         struct sctp_paramhdr param_buf, *phdr;
2285         int ptype;
2286         int zero_address = 0;
2287 #ifdef INET
2288         struct sockaddr_in *sin;
2289 #endif
2290 #ifdef INET6
2291         struct sockaddr_in6 *sin6;
2292 #endif
2293
2294         memset(&remote_store, 0, sizeof(remote_store));
2295         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2296             &param_buf, sizeof(struct sctp_paramhdr));
2297         if (phdr == NULL) {
2298                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2299                     __func__);
2300                 return NULL;
2301         }
2302         ptype = (int)((uint32_t)ntohs(phdr->param_type));
2303         /* get the correlation address */
2304         switch (ptype) {
2305 #ifdef INET6
2306         case SCTP_IPV6_ADDRESS:
2307                 {
2308                         /* ipv6 address param */
2309                         struct sctp_ipv6addr_param *p6, p6_buf;
2310
2311                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2312                                 return NULL;
2313                         }
2314                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2315                             offset + sizeof(struct sctp_asconf_chunk),
2316                             &p6_buf.ph, sizeof(p6_buf));
2317                         if (p6 == NULL) {
2318                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2319                                     __func__);
2320                                 return (NULL);
2321                         }
2322                         sin6 = &remote_store.sin6;
2323                         sin6->sin6_family = AF_INET6;
2324                         sin6->sin6_len = sizeof(*sin6);
2325                         sin6->sin6_port = sh->src_port;
2326                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2327                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2328                                 zero_address = 1;
2329                         break;
2330                 }
2331 #endif
2332 #ifdef INET
2333         case SCTP_IPV4_ADDRESS:
2334                 {
2335                         /* ipv4 address param */
2336                         struct sctp_ipv4addr_param *p4, p4_buf;
2337
2338                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2339                                 return NULL;
2340                         }
2341                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2342                             offset + sizeof(struct sctp_asconf_chunk),
2343                             &p4_buf.ph, sizeof(p4_buf));
2344                         if (p4 == NULL) {
2345                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2346                                     __func__);
2347                                 return (NULL);
2348                         }
2349                         sin = &remote_store.sin;
2350                         sin->sin_family = AF_INET;
2351                         sin->sin_len = sizeof(*sin);
2352                         sin->sin_port = sh->src_port;
2353                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2354                         if (sin->sin_addr.s_addr == INADDR_ANY)
2355                                 zero_address = 1;
2356                         break;
2357                 }
2358 #endif
2359         default:
2360                 /* invalid address param type */
2361                 return NULL;
2362         }
2363
2364         if (zero_address) {
2365                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2366                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2367                 if (stcb != NULL) {
2368                         SCTP_INP_DECR_REF(*inp_p);
2369                 }
2370         } else {
2371                 stcb = sctp_findassociation_ep_addr(inp_p,
2372                     &remote_store.sa, netp,
2373                     dst, NULL);
2374         }
2375         return (stcb);
2376 }
2377
2378 /*
2379  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2380  * addresses. This way if we don't get a bind we by default pick a ephemeral
2381  * port with all addresses bound.
2382  */
2383 int
2384 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2385 {
2386         /*
2387          * we get called when a new endpoint starts up. We need to allocate
2388          * the sctp_inpcb structure from the zone and init it. Mark it as
2389          * unbound and find a port that we can use as an ephemeral with
2390          * INADDR_ANY. If the user binds later no problem we can then add in
2391          * the specific addresses. And setup the default parameters for the
2392          * EP.
2393          */
2394         int i, error;
2395         struct sctp_inpcb *inp;
2396         struct sctp_pcb *m;
2397         struct timeval time;
2398         sctp_sharedkey_t *null_key;
2399
2400         error = 0;
2401
2402         SCTP_INP_INFO_WLOCK();
2403         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2404         if (inp == NULL) {
2405                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2406                 SCTP_INP_INFO_WUNLOCK();
2407                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2408                 return (ENOBUFS);
2409         }
2410         /* zap it */
2411         memset(inp, 0, sizeof(*inp));
2412
2413         /* bump generations */
2414         /* setup socket pointers */
2415         inp->sctp_socket = so;
2416         inp->ip_inp.inp.inp_socket = so;
2417         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2418 #ifdef INET6
2419         if (INP_SOCKAF(so) == AF_INET6) {
2420                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2421                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2422                 }
2423                 if (MODULE_GLOBAL(ip6_v6only)) {
2424                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2425                 }
2426         }
2427 #endif
2428         inp->sctp_associd_counter = 1;
2429         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2430         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2431         inp->max_cwnd = 0;
2432         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2433         inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable);
2434         inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable);
2435         inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable);
2436         inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable);
2437         inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2438         inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2439         inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2440         inp->idata_supported = 0;
2441
2442         inp->fibnum = so->so_fibnum;
2443         /* init the small hash table we use to track asocid <-> tcb */
2444         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2445         if (inp->sctp_asocidhash == NULL) {
2446                 crfree(inp->ip_inp.inp.inp_cred);
2447                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2448                 SCTP_INP_INFO_WUNLOCK();
2449                 return (ENOBUFS);
2450         }
2451         SCTP_INCR_EP_COUNT();
2452         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2453         SCTP_INP_INFO_WUNLOCK();
2454
2455         so->so_pcb = (caddr_t)inp;
2456
2457         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2458                 /* UDP style socket */
2459                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2460                     SCTP_PCB_FLAGS_UNBOUND);
2461                 /* Be sure it is NON-BLOCKING IO for UDP */
2462                 /* SCTP_SET_SO_NBIO(so); */
2463         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2464                 /* TCP style socket */
2465                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2466                     SCTP_PCB_FLAGS_UNBOUND);
2467                 /* Be sure we have blocking IO by default */
2468                 SOCK_LOCK(so);
2469                 SCTP_CLEAR_SO_NBIO(so);
2470                 SOCK_UNLOCK(so);
2471         } else {
2472                 /*
2473                  * unsupported socket type (RAW, etc)- in case we missed it
2474                  * in protosw
2475                  */
2476                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2477                 so->so_pcb = NULL;
2478                 crfree(inp->ip_inp.inp.inp_cred);
2479                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2480                 return (EOPNOTSUPP);
2481         }
2482         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2483                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2484                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2485         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2486                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2487                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2488         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2489                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2490                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2491         }
2492         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2493             &inp->sctp_hashmark);
2494         if (inp->sctp_tcbhash == NULL) {
2495                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2496                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2497                 so->so_pcb = NULL;
2498                 crfree(inp->ip_inp.inp.inp_cred);
2499                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2500                 return (ENOBUFS);
2501         }
2502         inp->def_vrf_id = vrf_id;
2503
2504         SCTP_INP_INFO_WLOCK();
2505         SCTP_INP_LOCK_INIT(inp);
2506         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2507         SCTP_INP_READ_INIT(inp);
2508         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2509         /* lock the new ep */
2510         SCTP_INP_WLOCK(inp);
2511
2512         /* add it to the info area */
2513         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2514         SCTP_INP_INFO_WUNLOCK();
2515
2516         TAILQ_INIT(&inp->read_queue);
2517         LIST_INIT(&inp->sctp_addr_list);
2518
2519         LIST_INIT(&inp->sctp_asoc_list);
2520
2521 #ifdef SCTP_TRACK_FREED_ASOCS
2522         /* TEMP CODE */
2523         LIST_INIT(&inp->sctp_asoc_free_list);
2524 #endif
2525         /* Init the timer structure for signature change */
2526         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2527         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2528
2529         /* now init the actual endpoint default data */
2530         m = &inp->sctp_ep;
2531
2532         /* setup the base timeout information */
2533         m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC);      /* needed ? */
2534         m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC);      /* needed ? */
2535         m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2536         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2537         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2538         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2539         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2540         /* all max/min max are in ms */
2541         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2542         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2543         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2544         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2545         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2546         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2547         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2548         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2549         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2550         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2551         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2552         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2553         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2554
2555         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2556         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2557         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2558         /* number of streams to pre-open on a association */
2559         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2560
2561         m->default_mtu = 0;
2562         /* Add adaptation cookie */
2563         m->adaptation_layer_indicator = 0;
2564         m->adaptation_layer_indicator_provided = 0;
2565
2566         /* seed random number generator */
2567         m->random_counter = 1;
2568         m->store_at = SCTP_SIGNATURE_SIZE;
2569         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2570         sctp_fill_random_store(m);
2571
2572         /* Minimum cookie size */
2573         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2574             sizeof(struct sctp_state_cookie);
2575         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2576
2577         /* Setup the initial secret */
2578         (void)SCTP_GETTIME_TIMEVAL(&time);
2579         m->time_of_secret_change = time.tv_sec;
2580
2581         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2582                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2583         }
2584         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2585
2586         /* How long is a cookie good for ? */
2587         m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2588         /*
2589          * Initialize authentication parameters
2590          */
2591         m->local_hmacs = sctp_default_supported_hmaclist();
2592         m->local_auth_chunks = sctp_alloc_chunklist();
2593         if (inp->asconf_supported) {
2594                 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2595                 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2596         }
2597         m->default_dscp = 0;
2598 #ifdef INET6
2599         m->default_flowlabel = 0;
2600 #endif
2601         m->port = 0;            /* encapsulation disabled by default */
2602         LIST_INIT(&m->shared_keys);
2603         /* add default NULL key as key id 0 */
2604         null_key = sctp_alloc_sharedkey();
2605         sctp_insert_sharedkey(&m->shared_keys, null_key);
2606         SCTP_INP_WUNLOCK(inp);
2607 #ifdef SCTP_LOG_CLOSING
2608         sctp_log_closing(inp, NULL, 12);
2609 #endif
2610         return (error);
2611 }
2612
2613 void
2614 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2615     struct sctp_tcb *stcb)
2616 {
2617         struct sctp_nets *net;
2618         uint16_t lport, rport;
2619         struct sctppcbhead *head;
2620         struct sctp_laddr *laddr, *oladdr;
2621
2622         atomic_add_int(&stcb->asoc.refcnt, 1);
2623         SCTP_TCB_UNLOCK(stcb);
2624         SCTP_INP_INFO_WLOCK();
2625         SCTP_INP_WLOCK(old_inp);
2626         SCTP_INP_WLOCK(new_inp);
2627         SCTP_TCB_LOCK(stcb);
2628         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2629
2630 #ifdef INET6
2631         if (old_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2632                 new_inp->ip_inp.inp.inp_flags |= old_inp->ip_inp.inp.inp_flags & INP_CONTROLOPTS;
2633                 if (old_inp->ip_inp.inp.in6p_outputopts) {
2634                         new_inp->ip_inp.inp.in6p_outputopts = ip6_copypktopts(old_inp->ip_inp.inp.in6p_outputopts, M_NOWAIT);
2635                 }
2636         }
2637 #endif
2638 #if defined(INET) && defined(INET6)
2639         else
2640 #endif
2641 #ifdef INET
2642         {
2643                 new_inp->ip_inp.inp.inp_ip_tos = old_inp->ip_inp.inp.inp_ip_tos;
2644                 new_inp->ip_inp.inp.inp_ip_ttl = old_inp->ip_inp.inp.inp_ip_ttl;
2645         }
2646 #endif
2647         new_inp->sctp_ep.time_of_secret_change =
2648             old_inp->sctp_ep.time_of_secret_change;
2649         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2650             sizeof(old_inp->sctp_ep.secret_key));
2651         new_inp->sctp_ep.current_secret_number =
2652             old_inp->sctp_ep.current_secret_number;
2653         new_inp->sctp_ep.last_secret_number =
2654             old_inp->sctp_ep.last_secret_number;
2655         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2656
2657         /* make it so new data pours into the new socket */
2658         stcb->sctp_socket = new_inp->sctp_socket;
2659         stcb->sctp_ep = new_inp;
2660
2661         /* Copy the port across */
2662         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2663         rport = stcb->rport;
2664         /* Pull the tcb from the old association */
2665         LIST_REMOVE(stcb, sctp_tcbhash);
2666         LIST_REMOVE(stcb, sctp_tcblist);
2667         if (stcb->asoc.in_asocid_hash) {
2668                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2669         }
2670         /* Now insert the new_inp into the TCP connected hash */
2671         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2672
2673         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2674         /* Its safe to access */
2675         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2676
2677         /* Now move the tcb into the endpoint list */
2678         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2679         /*
2680          * Question, do we even need to worry about the ep-hash since we
2681          * only have one connection? Probably not :> so lets get rid of it
2682          * and not suck up any kernel memory in that.
2683          */
2684         if (stcb->asoc.in_asocid_hash) {
2685                 struct sctpasochead *lhd;
2686
2687                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2688                     new_inp->hashasocidmark)];
2689                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2690         }
2691         /* Ok. Let's restart timer. */
2692         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2693                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2694                     stcb, net);
2695         }
2696
2697         SCTP_INP_INFO_WUNLOCK();
2698         if (new_inp->sctp_tcbhash != NULL) {
2699                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2700                 new_inp->sctp_tcbhash = NULL;
2701         }
2702         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2703                 /* Subset bound, so copy in the laddr list from the old_inp */
2704                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2705                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2706                         if (laddr == NULL) {
2707                                 /*
2708                                  * Gak, what can we do? This assoc is really
2709                                  * HOSED. We probably should send an abort
2710                                  * here.
2711                                  */
2712                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2713                                 continue;
2714                         }
2715                         SCTP_INCR_LADDR_COUNT();
2716                         memset(laddr, 0, sizeof(*laddr));
2717                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2718                         laddr->ifa = oladdr->ifa;
2719                         atomic_add_int(&laddr->ifa->refcount, 1);
2720                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2721                             sctp_nxt_addr);
2722                         new_inp->laddr_count++;
2723                         if (oladdr == stcb->asoc.last_used_address) {
2724                                 stcb->asoc.last_used_address = laddr;
2725                         }
2726                 }
2727         }
2728         /* Now any running timers need to be adjusted. */
2729         if (stcb->asoc.dack_timer.ep == old_inp) {
2730                 SCTP_INP_DECR_REF(old_inp);
2731                 stcb->asoc.dack_timer.ep = new_inp;
2732                 SCTP_INP_INCR_REF(new_inp);
2733         }
2734         if (stcb->asoc.asconf_timer.ep == old_inp) {
2735                 SCTP_INP_DECR_REF(old_inp);
2736                 stcb->asoc.asconf_timer.ep = new_inp;
2737                 SCTP_INP_INCR_REF(new_inp);
2738         }
2739         if (stcb->asoc.strreset_timer.ep == old_inp) {
2740                 SCTP_INP_DECR_REF(old_inp);
2741                 stcb->asoc.strreset_timer.ep = new_inp;
2742                 SCTP_INP_INCR_REF(new_inp);
2743         }
2744         if (stcb->asoc.shut_guard_timer.ep == old_inp) {
2745                 SCTP_INP_DECR_REF(old_inp);
2746                 stcb->asoc.shut_guard_timer.ep = new_inp;
2747                 SCTP_INP_INCR_REF(new_inp);
2748         }
2749         if (stcb->asoc.autoclose_timer.ep == old_inp) {
2750                 SCTP_INP_DECR_REF(old_inp);
2751                 stcb->asoc.autoclose_timer.ep = new_inp;
2752                 SCTP_INP_INCR_REF(new_inp);
2753         }
2754         if (stcb->asoc.delete_prim_timer.ep == old_inp) {
2755                 SCTP_INP_DECR_REF(old_inp);
2756                 stcb->asoc.delete_prim_timer.ep = new_inp;
2757                 SCTP_INP_INCR_REF(new_inp);
2758         }
2759         /* now what about the nets? */
2760         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2761                 if (net->pmtu_timer.ep == old_inp) {
2762                         SCTP_INP_DECR_REF(old_inp);
2763                         net->pmtu_timer.ep = new_inp;
2764                         SCTP_INP_INCR_REF(new_inp);
2765                 }
2766                 if (net->hb_timer.ep == old_inp) {
2767                         SCTP_INP_DECR_REF(old_inp);
2768                         net->hb_timer.ep = new_inp;
2769                         SCTP_INP_INCR_REF(new_inp);
2770                 }
2771                 if (net->rxt_timer.ep == old_inp) {
2772                         SCTP_INP_DECR_REF(old_inp);
2773                         net->rxt_timer.ep = new_inp;
2774                         SCTP_INP_INCR_REF(new_inp);
2775                 }
2776         }
2777         SCTP_INP_WUNLOCK(new_inp);
2778         SCTP_INP_WUNLOCK(old_inp);
2779 }
2780
2781 /*
2782  * insert an laddr entry with the given ifa for the desired list
2783  */
2784 static int
2785 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2786 {
2787         struct sctp_laddr *laddr;
2788
2789         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2790         if (laddr == NULL) {
2791                 /* out of memory? */
2792                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2793                 return (EINVAL);
2794         }
2795         SCTP_INCR_LADDR_COUNT();
2796         memset(laddr, 0, sizeof(*laddr));
2797         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2798         laddr->ifa = ifa;
2799         laddr->action = act;
2800         atomic_add_int(&ifa->refcount, 1);
2801         /* insert it */
2802         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2803
2804         return (0);
2805 }
2806
2807 /*
2808  * Remove an laddr entry from the local address list (on an assoc)
2809  */
2810 static void
2811 sctp_remove_laddr(struct sctp_laddr *laddr)
2812 {
2813
2814         /* remove from the list */
2815         LIST_REMOVE(laddr, sctp_nxt_addr);
2816         sctp_free_ifa(laddr->ifa);
2817         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2818         SCTP_DECR_LADDR_COUNT();
2819 }
2820
2821 /*
2822  * Bind the socket, with the PCB and global info locks held.  Note, if a
2823  * socket address is specified, the PCB lock may be dropped and re-acquired.
2824  *
2825  * sctp_ifap is used to bypass normal local address validation checks.
2826  */
2827 int
2828 sctp_inpcb_bind_locked(struct sctp_inpcb *inp, struct sockaddr *addr,
2829     struct sctp_ifa *sctp_ifap, struct thread *td)
2830 {
2831         /* bind a ep to a socket address */
2832         struct sctppcbhead *head;
2833         struct sctp_inpcb *inp_tmp;
2834         struct inpcb *ip_inp;
2835         int port_reuse_active = 0;
2836         int bindall;
2837         uint16_t lport;
2838         int error;
2839         uint32_t vrf_id;
2840
2841         KASSERT(td != NULL, ("%s: null thread", __func__));
2842
2843         error = 0;
2844         lport = 0;
2845         bindall = 1;
2846         ip_inp = &inp->ip_inp.inp;
2847
2848         SCTP_INP_INFO_WLOCK_ASSERT();
2849         SCTP_INP_WLOCK_ASSERT(inp);
2850
2851 #ifdef SCTP_DEBUG
2852         if (addr) {
2853                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2854                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2855                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2856                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2857         }
2858 #endif
2859         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2860                 error = EINVAL;
2861                 /* already did a bind, subsequent binds NOT allowed ! */
2862                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2863                 goto out;
2864         }
2865         if (addr != NULL) {
2866                 switch (addr->sa_family) {
2867 #ifdef INET
2868                 case AF_INET:
2869                         {
2870                                 struct sockaddr_in *sin;
2871
2872                                 /* IPV6_V6ONLY socket? */
2873                                 if (SCTP_IPV6_V6ONLY(inp)) {
2874                                         error = EINVAL;
2875                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2876                                         goto out;
2877                                 }
2878                                 if (addr->sa_len != sizeof(*sin)) {
2879                                         error = EINVAL;
2880                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2881                                         goto out;
2882                                 }
2883
2884                                 sin = (struct sockaddr_in *)addr;
2885                                 lport = sin->sin_port;
2886                                 /*
2887                                  * For LOOPBACK the prison_local_ip4() call
2888                                  * will transmute the ip address to the
2889                                  * proper value.
2890                                  */
2891                                 if ((error = prison_local_ip4(td->td_ucred, &sin->sin_addr)) != 0) {
2892                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2893                                         goto out;
2894                                 }
2895                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2896                                         bindall = 0;
2897                                 }
2898                                 break;
2899                         }
2900 #endif
2901 #ifdef INET6
2902                 case AF_INET6:
2903                         {
2904                                 /*
2905                                  * Only for pure IPv6 Address. (No IPv4
2906                                  * Mapped!)
2907                                  */
2908                                 struct sockaddr_in6 *sin6;
2909
2910                                 sin6 = (struct sockaddr_in6 *)addr;
2911                                 if (addr->sa_len != sizeof(*sin6)) {
2912                                         error = EINVAL;
2913                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2914                                         goto out;
2915                                 }
2916                                 lport = sin6->sin6_port;
2917                                 /*
2918                                  * For LOOPBACK the prison_local_ip6() call
2919                                  * will transmute the ipv6 address to the
2920                                  * proper value.
2921                                  */
2922                                 if ((error = prison_local_ip6(td->td_ucred, &sin6->sin6_addr,
2923                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2924                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2925                                         goto out;
2926                                 }
2927                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2928                                         bindall = 0;
2929                                         /* KAME hack: embed scopeid */
2930                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2931                                                 error = EINVAL;
2932                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2933                                                 goto out;
2934                                         }
2935                                 }
2936                                 /* this must be cleared for ifa_ifwithaddr() */
2937                                 sin6->sin6_scope_id = 0;
2938                                 break;
2939                         }
2940 #endif
2941                 default:
2942                         error = EAFNOSUPPORT;
2943                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2944                         goto out;
2945                 }
2946         }
2947         /* Setup a vrf_id to be the default for the non-bind-all case. */
2948         vrf_id = inp->def_vrf_id;
2949
2950         if (lport) {
2951                 /*
2952                  * Did the caller specify a port? if so we must see if an ep
2953                  * already has this one bound.
2954                  */
2955                 /* got to be root to get at low ports */
2956                 if (ntohs(lport) < IPPORT_RESERVED &&
2957                     (error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) {
2958                         goto out;
2959                 }
2960                 SCTP_INP_INCR_REF(inp);
2961                 SCTP_INP_WUNLOCK(inp);
2962                 if (bindall) {
2963                         vrf_id = inp->def_vrf_id;
2964                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2965                         if (inp_tmp != NULL) {
2966                                 /*
2967                                  * lock guy returned and lower count note
2968                                  * that we are not bound so inp_tmp should
2969                                  * NEVER be inp. And it is this inp
2970                                  * (inp_tmp) that gets the reference bump,
2971                                  * so we must lower it.
2972                                  */
2973                                 SCTP_INP_DECR_REF(inp_tmp);
2974                                 /* unlock info */
2975                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2976                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2977                                         /*
2978                                          * Ok, must be one-2-one and
2979                                          * allowing port re-use
2980                                          */
2981                                         port_reuse_active = 1;
2982                                         goto continue_anyway;
2983                                 }
2984                                 SCTP_INP_WLOCK(inp);
2985                                 SCTP_INP_DECR_REF(inp);
2986                                 error = EADDRINUSE;
2987                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2988                                 goto out;
2989                         }
2990                 } else {
2991                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2992                         if (inp_tmp != NULL) {
2993                                 /*
2994                                  * lock guy returned and lower count note
2995                                  * that we are not bound so inp_tmp should
2996                                  * NEVER be inp. And it is this inp
2997                                  * (inp_tmp) that gets the reference bump,
2998                                  * so we must lower it.
2999                                  */
3000                                 SCTP_INP_DECR_REF(inp_tmp);
3001                                 /* unlock info */
3002                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3003                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3004                                         /*
3005                                          * Ok, must be one-2-one and
3006                                          * allowing port re-use
3007                                          */
3008                                         port_reuse_active = 1;
3009                                         goto continue_anyway;
3010                                 }
3011                                 SCTP_INP_WLOCK(inp);
3012                                 SCTP_INP_DECR_REF(inp);
3013                                 error = EADDRINUSE;
3014                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3015                                 goto out;
3016                         }
3017                 }
3018 continue_anyway:
3019                 SCTP_INP_WLOCK(inp);
3020                 SCTP_INP_DECR_REF(inp);
3021                 if (bindall) {
3022                         /* verify that no lport is not used by a singleton */
3023                         if ((port_reuse_active == 0) &&
3024                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
3025                                 /* Sorry someone already has this one bound */
3026                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3027                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3028                                         port_reuse_active = 1;
3029                                 } else {
3030                                         error = EADDRINUSE;
3031                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3032                                         goto out;
3033                                 }
3034                         }
3035                 }
3036         } else {
3037                 uint16_t first, last, candidate;
3038                 uint16_t count;
3039
3040                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3041                         first = MODULE_GLOBAL(ipport_hifirstauto);
3042                         last = MODULE_GLOBAL(ipport_hilastauto);
3043                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3044                         if ((error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) {
3045                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3046                                 goto out;
3047                         }
3048                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3049                         last = MODULE_GLOBAL(ipport_lowlastauto);
3050                 } else {
3051                         first = MODULE_GLOBAL(ipport_firstauto);
3052                         last = MODULE_GLOBAL(ipport_lastauto);
3053                 }
3054                 if (first > last) {
3055                         uint16_t temp;
3056
3057                         temp = first;
3058                         first = last;
3059                         last = temp;
3060                 }
3061                 count = last - first + 1;       /* number of candidates */
3062                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3063
3064                 for (;;) {
3065                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3066                                 lport = htons(candidate);
3067                                 break;
3068                         }
3069                         if (--count == 0) {
3070                                 error = EADDRINUSE;
3071                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3072                                 goto out;
3073                         }
3074                         if (candidate == last)
3075                                 candidate = first;
3076                         else
3077                                 candidate = candidate + 1;
3078                 }
3079         }
3080         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3081             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3082                 /*
3083                  * this really should not happen. The guy did a non-blocking
3084                  * bind and then did a close at the same time.
3085                  */
3086                 error = EINVAL;
3087                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3088                 goto out;
3089         }
3090         /* ok we look clear to give out this port, so lets setup the binding */
3091         if (bindall) {
3092                 /* binding to all addresses, so just set in the proper flags */
3093                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3094                 /* set the automatic addr changes from kernel flag */
3095                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3096                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3097                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3098                 } else {
3099                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3100                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3101                 }
3102                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3103                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3104                 } else {
3105                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3106                 }
3107                 /*
3108                  * set the automatic mobility_base from kernel flag (by
3109                  * micchie)
3110                  */
3111                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3112                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3113                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3114                 } else {
3115                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3116                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3117                 }
3118                 /*
3119                  * set the automatic mobility_fasthandoff from kernel flag
3120                  * (by micchie)
3121                  */
3122                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3123                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3124                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3125                 } else {
3126                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3127                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3128                 }
3129         } else {
3130                 /*
3131                  * bind specific, make sure flags is off and add a new
3132                  * address structure to the sctp_addr_list inside the ep
3133                  * structure.
3134                  *
3135                  * We will need to allocate one and insert it at the head.
3136                  * The socketopt call can just insert new addresses in there
3137                  * as well. It will also have to do the embed scope kame
3138                  * hack too (before adding).
3139                  */
3140                 struct sctp_ifa *ifa;
3141                 union sctp_sockstore store;
3142
3143                 memset(&store, 0, sizeof(store));
3144                 switch (addr->sa_family) {
3145 #ifdef INET
3146                 case AF_INET:
3147                         memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3148                         store.sin.sin_port = 0;
3149                         break;
3150 #endif
3151 #ifdef INET6
3152                 case AF_INET6:
3153                         memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3154                         store.sin6.sin6_port = 0;
3155                         break;
3156 #endif
3157                 default:
3158                         break;
3159                 }
3160                 /*
3161                  * first find the interface with the bound address need to
3162                  * zero out the port to find the address! yuck! can't do
3163                  * this earlier since need port for sctp_pcb_findep()
3164                  */
3165                 if (sctp_ifap != NULL) {
3166                         ifa = sctp_ifap;
3167                 } else {
3168                         /*
3169                          * Note for BSD we hit here always other O/S's will
3170                          * pass things in via the sctp_ifap argument.
3171                          */
3172                         ifa = sctp_find_ifa_by_addr(&store.sa,
3173                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3174                 }
3175                 if (ifa == NULL) {
3176                         error = EADDRNOTAVAIL;
3177                         /* Can't find an interface with that address */
3178                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3179                         goto out;
3180                 }
3181 #ifdef INET6
3182                 if (addr->sa_family == AF_INET6) {
3183                         /* GAK, more FIXME IFA lock? */
3184                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3185                                 /* Can't bind a non-existent addr. */
3186                                 error = EINVAL;
3187                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3188                                 goto out;
3189                         }
3190                 }
3191 #endif
3192                 /* we're not bound all */
3193                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3194                 /* allow bindx() to send ASCONF's for binding changes */
3195                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3196                 /* clear automatic addr changes from kernel flag */
3197                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3198
3199                 /* add this address to the endpoint list */
3200                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3201                 if (error != 0)
3202                         goto out;
3203                 inp->laddr_count++;
3204         }
3205         /* find the bucket */
3206         if (port_reuse_active) {
3207                 /* Put it into tcp 1-2-1 hash */
3208                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3209                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3210         } else {
3211                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3212         }
3213         /* put it in the bucket */
3214         LIST_INSERT_HEAD(head, inp, sctp_hash);
3215         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3216             (void *)head, ntohs(lport), port_reuse_active);
3217         /* set in the port */
3218         inp->sctp_lport = lport;
3219
3220         /* turn off just the unbound flag */
3221         KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 0,
3222             ("%s: inp %p is already bound", __func__, inp));
3223         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3224 out:
3225         return (error);
3226 }
3227
3228 int
3229 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
3230     struct sctp_ifa *sctp_ifap, struct thread *td)
3231 {
3232         struct sctp_inpcb *inp;
3233         int error;
3234
3235         inp = so->so_pcb;
3236         SCTP_INP_INFO_WLOCK();
3237         SCTP_INP_WLOCK(inp);
3238         error = sctp_inpcb_bind_locked(inp, addr, sctp_ifap, td);
3239         SCTP_INP_WUNLOCK(inp);
3240         SCTP_INP_INFO_WUNLOCK();
3241         return (error);
3242 }
3243
3244 static void
3245 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3246 {
3247         struct sctp_iterator *it, *nit;
3248
3249         /*
3250          * We enter with the only the ITERATOR_LOCK in place and a write
3251          * lock on the inp_info stuff.
3252          */
3253         it = sctp_it_ctl.cur_it;
3254         if (it && (it->vn != curvnet)) {
3255                 /* Its not looking at our VNET */
3256                 return;
3257         }
3258         if (it && (it->inp == inp)) {
3259                 /*
3260                  * This is tricky and we hold the iterator lock, but when it
3261                  * returns and gets the lock (when we release it) the
3262                  * iterator will try to operate on inp. We need to stop that
3263                  * from happening. But of course the iterator has a
3264                  * reference on the stcb and inp. We can mark it and it will
3265                  * stop.
3266                  *
3267                  * If its a single iterator situation, we set the end
3268                  * iterator flag. Otherwise we set the iterator to go to the
3269                  * next inp.
3270                  *
3271                  */
3272                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3273                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3274                 } else {
3275                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3276                 }
3277         }
3278         /*
3279          * Now go through and remove any single reference to our inp that
3280          * may be still pending on the list
3281          */
3282         SCTP_IPI_ITERATOR_WQ_LOCK();
3283         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3284                 if (it->vn != curvnet) {
3285                         continue;
3286                 }
3287                 if (it->inp == inp) {
3288                         /* This one points to me is it inp specific? */
3289                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3290                                 /* Remove and free this one */
3291                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3292                                     it, sctp_nxt_itr);
3293                                 if (it->function_atend != NULL) {
3294                                         (*it->function_atend) (it->pointer, it->val);
3295                                 }
3296                                 SCTP_FREE(it, SCTP_M_ITER);
3297                         } else {
3298                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3299                                 if (it->inp) {
3300                                         SCTP_INP_INCR_REF(it->inp);
3301                                 }
3302                         }
3303                         /*
3304                          * When its put in the refcnt is incremented so decr
3305                          * it
3306                          */
3307                         SCTP_INP_DECR_REF(inp);
3308                 }
3309         }
3310         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3311 }
3312
3313 /* release sctp_inpcb unbind the port */
3314 void
3315 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3316 {
3317         /*
3318          * Here we free a endpoint. We must find it (if it is in the Hash
3319          * table) and remove it from there. Then we must also find it in the
3320          * overall list and remove it from there. After all removals are
3321          * complete then any timer has to be stopped. Then start the actual
3322          * freeing. a) Any local lists. b) Any associations. c) The hash of
3323          * all associations. d) finally the ep itself.
3324          */
3325         struct sctp_tcb *asoc, *nasoc;
3326         struct sctp_laddr *laddr, *nladdr;
3327         struct inpcb *ip_pcb;
3328         struct socket *so;
3329         int being_refed = 0;
3330         struct sctp_queued_to_read *sq, *nsq;
3331         int cnt;
3332         sctp_sharedkey_t *shared_key, *nshared_key;
3333
3334 #ifdef SCTP_LOG_CLOSING
3335         sctp_log_closing(inp, NULL, 0);
3336 #endif
3337         SCTP_ITERATOR_LOCK();
3338         /* mark any iterators on the list or being processed */
3339         sctp_iterator_inp_being_freed(inp);
3340         SCTP_ITERATOR_UNLOCK();
3341
3342         SCTP_ASOC_CREATE_LOCK(inp);
3343         SCTP_INP_INFO_WLOCK();
3344         SCTP_INP_WLOCK(inp);
3345         so = inp->sctp_socket;
3346         KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) != 0,
3347             ("%s: inp %p still has socket", __func__, inp));
3348         KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) == 0,
3349             ("%s: double free of inp %p", __func__, inp));
3350         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3351                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3352                 /* socket is gone, so no more wakeups allowed */
3353                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3354                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3355                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3356         }
3357         /* First time through we have the socket lock, after that no more. */
3358         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3359             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3360
3361         if (inp->control) {
3362                 sctp_m_freem(inp->control);
3363                 inp->control = NULL;
3364         }
3365         if (inp->pkt) {
3366                 sctp_m_freem(inp->pkt);
3367                 inp->pkt = NULL;
3368         }
3369         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3370                                          * here but I will be nice :> (i.e.
3371                                          * ip_pcb = ep;) */
3372         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3373                 int cnt_in_sd;
3374
3375                 cnt_in_sd = 0;
3376                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3377                         SCTP_TCB_LOCK(asoc);
3378                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3379                                 asoc->sctp_socket = NULL;
3380                                 /* Skip guys being freed */
3381                                 cnt_in_sd++;
3382                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3383                                         /*
3384                                          * Special case - we did not start a
3385                                          * kill timer on the asoc due to it
3386                                          * was not closed. So go ahead and
3387                                          * start it now.
3388                                          */
3389                                         SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3390                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3391                                 }
3392                                 SCTP_TCB_UNLOCK(asoc);
3393                                 continue;
3394                         }
3395                         if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
3396                             (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3397                             (asoc->asoc.total_output_queue_size == 0)) {
3398                                 /*
3399                                  * If we have data in queue, we don't want
3400                                  * to just free since the app may have done,
3401                                  * send()/close or connect/send/close. And
3402                                  * it wants the data to get across first.
3403                                  */
3404                                 /* Just abandon things in the front states */
3405                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3406                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3407                                         cnt_in_sd++;
3408                                 }
3409                                 continue;
3410                         }
3411                         /* Disconnect the socket please */
3412                         asoc->sctp_socket = NULL;
3413                         SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET);
3414                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3415                             (asoc->asoc.control_pdapi) ||
3416                             (asoc->asoc.size_on_all_streams > 0) ||
3417                             (so && (so->so_rcv.sb_cc > 0))) {
3418                                 /* Left with Data unread */
3419                                 struct mbuf *op_err;
3420
3421                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3422                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3423                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3424                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3425                                 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3426                                     (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3427                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3428                                 }
3429                                 if (sctp_free_assoc(inp, asoc,
3430                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3431                                         cnt_in_sd++;
3432                                 }
3433                                 continue;
3434                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3435                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3436                             (asoc->asoc.stream_queue_cnt == 0)) {
3437                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3438                                         goto abort_anyway;
3439                                 }
3440                                 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3441                                     (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3442                                         struct sctp_nets *netp;
3443
3444                                         /*
3445                                          * there is nothing queued to send,
3446                                          * so I send shutdown
3447                                          */
3448                                         if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3449                                             (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3450                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3451                                         }
3452                                         SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
3453                                         sctp_stop_timers_for_shutdown(asoc);
3454                                         if (asoc->asoc.alternate) {
3455                                                 netp = asoc->asoc.alternate;
3456                                         } else {
3457                                                 netp = asoc->asoc.primary_destination;
3458                                         }
3459                                         sctp_send_shutdown(asoc, netp);
3460                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3461                                             netp);
3462                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
3463                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3464                                 }
3465                         } else {
3466                                 /* mark into shutdown pending */
3467                                 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
3468                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
3469                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3470                                         SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT);
3471                                 }
3472                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3473                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3474                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3475                                         struct mbuf *op_err;
3476
3477                         abort_anyway:
3478                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3479                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3480                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3481                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3482                                         if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3483                                             (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3484                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3485                                         }
3486                                         if (sctp_free_assoc(inp, asoc,
3487                                             SCTP_PCBFREE_NOFORCE,
3488                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3489                                                 cnt_in_sd++;
3490                                         }
3491                                         continue;
3492                                 } else {
3493                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3494                                 }
3495                         }
3496                         cnt_in_sd++;
3497                         SCTP_TCB_UNLOCK(asoc);
3498                 }
3499                 /* now is there some left in our SHUTDOWN state? */
3500                 if (cnt_in_sd) {
3501 #ifdef SCTP_LOG_CLOSING
3502                         sctp_log_closing(inp, NULL, 2);
3503 #endif
3504                         inp->sctp_socket = NULL;
3505                         SCTP_INP_WUNLOCK(inp);
3506                         SCTP_ASOC_CREATE_UNLOCK(inp);
3507                         SCTP_INP_INFO_WUNLOCK();
3508                         return;
3509                 }
3510         }
3511         inp->sctp_socket = NULL;
3512         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3513             SCTP_PCB_FLAGS_UNBOUND) {
3514                 /*
3515                  * ok, this guy has been bound. It's port is somewhere in
3516                  * the SCTP_BASE_INFO(hash table). Remove it!
3517                  */
3518                 LIST_REMOVE(inp, sctp_hash);
3519                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3520         }
3521
3522         /*
3523          * If there is a timer running to kill us, forget it, since it may
3524          * have a contest on the INP lock.. which would cause us to die ...
3525          */
3526         cnt = 0;
3527         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3528                 SCTP_TCB_LOCK(asoc);
3529                 if (immediate != SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3530                         /* Disconnect the socket please */
3531                         asoc->sctp_socket = NULL;
3532                         SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET);
3533                 }
3534                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3535                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3536                                 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3537                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3538                         }
3539                         cnt++;
3540                         SCTP_TCB_UNLOCK(asoc);
3541                         continue;
3542                 }
3543                 /* Free associations that are NOT killing us */
3544                 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
3545                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3546                         struct mbuf *op_err;
3547
3548                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3549                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3550                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3551                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3552                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3553                         cnt++;
3554                         SCTP_TCB_UNLOCK(asoc);
3555                         continue;
3556                 }
3557                 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3558                     (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3559                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3560                 }
3561                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3562                     SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3563                         cnt++;
3564                 }
3565         }
3566         if (cnt) {
3567                 /* Ok we have someone out there that will kill us */
3568 #ifdef SCTP_LOG_CLOSING
3569                 sctp_log_closing(inp, NULL, 3);
3570 #endif
3571                 SCTP_INP_WUNLOCK(inp);
3572                 SCTP_ASOC_CREATE_UNLOCK(inp);
3573                 SCTP_INP_INFO_WUNLOCK();
3574                 return;
3575         }
3576         if (SCTP_INP_LOCK_CONTENDED(inp))
3577                 being_refed++;
3578         if (SCTP_INP_READ_CONTENDED(inp))
3579                 being_refed++;
3580         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3581                 being_refed++;
3582         /* NOTE: 0 refcount also means no timers are referencing us. */
3583         if ((inp->refcount) ||
3584             (being_refed) ||
3585             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3586 #ifdef SCTP_LOG_CLOSING
3587                 sctp_log_closing(inp, NULL, 4);
3588 #endif
3589                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3590                 SCTP_INP_WUNLOCK(inp);
3591                 SCTP_ASOC_CREATE_UNLOCK(inp);
3592                 SCTP_INP_INFO_WUNLOCK();
3593                 return;
3594         }
3595         inp->sctp_ep.signature_change.type = 0;
3596         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3597         /*
3598          * Remove it from the list .. last thing we need a lock for.
3599          */
3600         LIST_REMOVE(inp, sctp_list);
3601         SCTP_INP_WUNLOCK(inp);
3602         SCTP_ASOC_CREATE_UNLOCK(inp);
3603         SCTP_INP_INFO_WUNLOCK();
3604
3605 #ifdef SCTP_LOG_CLOSING
3606         sctp_log_closing(inp, NULL, 5);
3607 #endif
3608         if ((inp->sctp_asocidhash) != NULL) {
3609                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3610                 inp->sctp_asocidhash = NULL;
3611         }
3612         /* sa_ignore FREED_MEMORY */
3613         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3614                 /* Its only abandoned if it had data left */
3615                 if (sq->length)
3616                         SCTP_STAT_INCR(sctps_left_abandon);
3617
3618                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3619                 sctp_free_remote_addr(sq->whoFrom);
3620                 if (so)
3621                         so->so_rcv.sb_cc -= sq->length;
3622                 if (sq->data) {
3623                         sctp_m_freem(sq->data);
3624                         sq->data = NULL;
3625                 }
3626                 /*
3627                  * no need to free the net count, since at this point all
3628                  * assoc's are gone.
3629                  */
3630                 sctp_free_a_readq(NULL, sq);
3631         }
3632         /* Now the sctp_pcb things */
3633         /*
3634          * free each asoc if it is not already closed/free. we can't use the
3635          * macro here since le_next will get freed as part of the
3636          * sctp_free_assoc() call.
3637          */
3638         if (ip_pcb->inp_options) {
3639                 (void)sctp_m_free(ip_pcb->inp_options);
3640                 ip_pcb->inp_options = 0;
3641         }
3642 #ifdef INET6
3643         if (ip_pcb->inp_vflag & INP_IPV6) {
3644                 ip6_freepcbopts(ip_pcb->in6p_outputopts);
3645         }
3646 #endif                          /* INET6 */
3647         ip_pcb->inp_vflag = 0;
3648         /* free up authentication fields */
3649         if (inp->sctp_ep.local_auth_chunks != NULL)
3650                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3651         if (inp->sctp_ep.local_hmacs != NULL)
3652                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3653
3654         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3655                 LIST_REMOVE(shared_key, next);
3656                 sctp_free_sharedkey(shared_key);
3657                 /* sa_ignore FREED_MEMORY */
3658         }
3659
3660         /*
3661          * if we have an address list the following will free the list of
3662          * ifaddr's that are set into this ep. Again macro limitations here,
3663          * since the LIST_FOREACH could be a bad idea.
3664          */
3665         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3666                 sctp_remove_laddr(laddr);
3667         }
3668
3669 #ifdef SCTP_TRACK_FREED_ASOCS
3670         /* TEMP CODE */
3671         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3672                 LIST_REMOVE(asoc, sctp_tcblist);
3673                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3674                 SCTP_DECR_ASOC_COUNT();
3675         }
3676         /* *** END TEMP CODE *** */
3677 #endif
3678         /* Now lets see about freeing the EP hash table. */
3679         if (inp->sctp_tcbhash != NULL) {
3680                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3681                 inp->sctp_tcbhash = NULL;
3682         }
3683         /* Now we must put the ep memory back into the zone pool */
3684         crfree(inp->ip_inp.inp.inp_cred);
3685         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3686         SCTP_INP_LOCK_DESTROY(inp);
3687         SCTP_INP_READ_DESTROY(inp);
3688         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3689         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3690         SCTP_DECR_EP_COUNT();
3691 }
3692
3693 struct sctp_nets *
3694 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3695 {
3696         struct sctp_nets *net;
3697
3698         /* locate the address */
3699         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3700                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3701                         return (net);
3702         }
3703         return (NULL);
3704 }
3705
3706 int
3707 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3708 {
3709         struct sctp_ifa *sctp_ifa;
3710
3711         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3712         if (sctp_ifa) {
3713                 return (1);
3714         } else {
3715                 return (0);
3716         }
3717 }
3718
3719 /*
3720  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3721  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3722  * stats of stuff.
3723  */
3724 int
3725 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3726     struct sctp_nets **netp, uint16_t port, int set_scope, int from)
3727 {
3728         /*
3729          * The following is redundant to the same lines in the
3730          * sctp_aloc_assoc() but is needed since others call the add address
3731          * function
3732          */
3733         struct sctp_nets *net, *netfirst;
3734         int addr_inscope;
3735
3736         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3737             from);
3738         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3739
3740         netfirst = sctp_findnet(stcb, newaddr);
3741         if (netfirst) {
3742                 /*
3743                  * Lie and return ok, we don't want to make the association
3744                  * go away for this behavior. It will happen in the TCP
3745                  * model in a connected socket. It does not reach the hash
3746                  * table until after the association is built so it can't be
3747                  * found. Mark as reachable, since the initial creation will
3748                  * have been cleared and the NOT_IN_ASSOC flag will have
3749                  * been added... and we don't want to end up removing it
3750                  * back out.
3751                  */
3752                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3753                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3754                             SCTP_ADDR_UNCONFIRMED);
3755                 } else {
3756                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3757                 }
3758
3759                 return (0);
3760         }
3761         addr_inscope = 1;
3762         switch (newaddr->sa_family) {
3763 #ifdef INET
3764         case AF_INET:
3765                 {
3766                         struct sockaddr_in *sin;
3767
3768                         sin = (struct sockaddr_in *)newaddr;
3769                         if (sin->sin_addr.s_addr == 0) {
3770                                 /* Invalid address */
3771                                 return (-1);
3772                         }
3773                         /* zero out the zero area */
3774                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3775
3776                         /* assure len is set */
3777                         sin->sin_len = sizeof(struct sockaddr_in);
3778                         if (set_scope) {
3779                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3780                                         stcb->asoc.scope.ipv4_local_scope = 1;
3781                                 }
3782                         } else {
3783                                 /* Validate the address is in scope */
3784                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3785                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3786                                         addr_inscope = 0;
3787                                 }
3788                         }
3789                         break;
3790                 }
3791 #endif
3792 #ifdef INET6
3793         case AF_INET6:
3794                 {
3795                         struct sockaddr_in6 *sin6;
3796
3797                         sin6 = (struct sockaddr_in6 *)newaddr;
3798                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3799                                 /* Invalid address */
3800                                 return (-1);
3801                         }
3802                         /* assure len is set */
3803                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3804                         if (set_scope) {
3805                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3806                                         stcb->asoc.scope.loopback_scope = 1;
3807                                         stcb->asoc.scope.local_scope = 0;
3808                                         stcb->asoc.scope.ipv4_local_scope = 1;
3809                                         stcb->asoc.scope.site_scope = 1;
3810                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3811                                         /*
3812                                          * If the new destination is a
3813                                          * LINK_LOCAL we must have common
3814                                          * site scope. Don't set the local
3815                                          * scope since we may not share all
3816                                          * links, only loopback can do this.
3817                                          * Links on the local network would
3818                                          * also be on our private network
3819                                          * for v4 too.
3820                                          */
3821                                         stcb->asoc.scope.ipv4_local_scope = 1;
3822                                         stcb->asoc.scope.site_scope = 1;
3823                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3824                                         /*
3825                                          * If the new destination is
3826                                          * SITE_LOCAL then we must have site
3827                                          * scope in common.
3828                                          */
3829                                         stcb->asoc.scope.site_scope = 1;
3830                                 }
3831                         } else {
3832                                 /* Validate the address is in scope */
3833                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3834                                     (stcb->asoc.scope.loopback_scope == 0)) {
3835                                         addr_inscope = 0;
3836                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3837                                     (stcb->asoc.scope.local_scope == 0)) {
3838                                         addr_inscope = 0;
3839                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3840                                     (stcb->asoc.scope.site_scope == 0)) {
3841                                         addr_inscope = 0;
3842                                 }
3843                         }
3844                         break;
3845                 }
3846 #endif
3847         default:
3848                 /* not supported family type */
3849                 return (-1);
3850         }
3851         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3852         if (net == NULL) {
3853                 return (-1);
3854         }
3855         SCTP_INCR_RADDR_COUNT();
3856         memset(net, 0, sizeof(struct sctp_nets));
3857         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3858         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3859         switch (newaddr->sa_family) {
3860 #ifdef INET
3861         case AF_INET:
3862                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3863                 break;
3864 #endif
3865 #ifdef INET6
3866         case AF_INET6:
3867                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3868                 break;
3869 #endif
3870         default:
3871                 break;
3872         }
3873         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3874         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3875                 stcb->asoc.scope.loopback_scope = 1;
3876                 stcb->asoc.scope.ipv4_local_scope = 1;
3877                 stcb->asoc.scope.local_scope = 0;
3878                 stcb->asoc.scope.site_scope = 1;
3879                 addr_inscope = 1;
3880         }
3881         net->failure_threshold = stcb->asoc.def_net_failure;
3882         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3883         if (addr_inscope == 0) {
3884                 net->dest_state = (SCTP_ADDR_REACHABLE |
3885                     SCTP_ADDR_OUT_OF_SCOPE);
3886         } else {
3887                 if (from == SCTP_ADDR_IS_CONFIRMED)
3888                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3889                         net->dest_state = SCTP_ADDR_REACHABLE;
3890                 else
3891                         net->dest_state = SCTP_ADDR_REACHABLE |
3892                             SCTP_ADDR_UNCONFIRMED;
3893         }
3894         /*
3895          * We set this to 0, the timer code knows that this means its an
3896          * initial value
3897          */
3898         net->rto_needed = 1;
3899         net->RTO = 0;
3900         net->RTO_measured = 0;
3901         stcb->asoc.numnets++;
3902         net->ref_count = 1;
3903         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3904         net->port = port;
3905         net->dscp = stcb->asoc.default_dscp;
3906 #ifdef INET6
3907         net->flowlabel = stcb->asoc.default_flowlabel;
3908 #endif
3909         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3910                 net->dest_state |= SCTP_ADDR_NOHB;
3911         } else {
3912                 net->dest_state &= ~SCTP_ADDR_NOHB;
3913         }
3914         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3915                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3916         } else {
3917                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3918         }
3919         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3920         /* Init the timer structure */
3921         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3922         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3923         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3924
3925         /* Now generate a route for this guy */
3926 #ifdef INET6
3927         /* KAME hack: embed scopeid */
3928         if (newaddr->sa_family == AF_INET6) {
3929                 struct sockaddr_in6 *sin6;
3930
3931                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3932                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3933                 sin6->sin6_scope_id = 0;
3934         }
3935 #endif
3936         SCTP_RTALLOC((sctp_route_t *)&net->ro,
3937             stcb->asoc.vrf_id,
3938             stcb->sctp_ep->fibnum);
3939
3940         net->src_addr_selected = 0;
3941         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3942                 /* Get source address */
3943                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3944                     stcb,
3945                     (sctp_route_t *)&net->ro,
3946                     net,
3947                     0,
3948                     stcb->asoc.vrf_id);
3949                 if (stcb->asoc.default_mtu > 0) {
3950                         net->mtu = stcb->asoc.default_mtu;
3951                         switch (net->ro._l_addr.sa.sa_family) {
3952 #ifdef INET
3953                         case AF_INET:
3954                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
3955                                 break;
3956 #endif
3957 #ifdef INET6
3958                         case AF_INET6:
3959                                 net->mtu += SCTP_MIN_OVERHEAD;
3960                                 break;
3961 #endif
3962                         default:
3963                                 break;
3964                         }
3965 #if defined(INET) || defined(INET6)
3966                         if (net->port) {
3967                                 net->mtu += (uint32_t)sizeof(struct udphdr);
3968                         }
3969 #endif
3970                 } else if (net->ro._s_addr != NULL) {
3971                         uint32_t imtu, rmtu, hcmtu;
3972
3973                         net->src_addr_selected = 1;
3974                         /* Now get the interface MTU */
3975                         if (net->ro._s_addr->ifn_p != NULL) {
3976                                 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3977                         } else {
3978                                 imtu = 0;
3979                         }
3980                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh);
3981                         hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum);
3982                         net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu);
3983                 }
3984         }
3985         if (net->mtu == 0) {
3986                 if (stcb->asoc.default_mtu > 0) {
3987                         net->mtu = stcb->asoc.default_mtu;
3988                         switch (net->ro._l_addr.sa.sa_family) {
3989 #ifdef INET
3990                         case AF_INET:
3991                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
3992                                 break;
3993 #endif
3994 #ifdef INET6
3995                         case AF_INET6:
3996                                 net->mtu += SCTP_MIN_OVERHEAD;
3997                                 break;
3998 #endif
3999                         default:
4000                                 break;
4001                         }
4002 #if defined(INET) || defined(INET6)
4003                         if (net->port) {
4004                                 net->mtu += (uint32_t)sizeof(struct udphdr);
4005                         }
4006 #endif
4007                 } else {
4008                         switch (newaddr->sa_family) {
4009 #ifdef INET
4010                         case AF_INET:
4011                                 net->mtu = SCTP_DEFAULT_MTU;
4012                                 break;
4013 #endif
4014 #ifdef INET6
4015                         case AF_INET6:
4016                                 net->mtu = 1280;
4017                                 break;
4018 #endif
4019                         default:
4020                                 break;
4021                         }
4022                 }
4023         }
4024 #if defined(INET) || defined(INET6)
4025         if (net->port) {
4026                 net->mtu -= (uint32_t)sizeof(struct udphdr);
4027         }
4028 #endif
4029         if (from == SCTP_ALLOC_ASOC) {
4030                 stcb->asoc.smallest_mtu = net->mtu;
4031         }
4032         if (stcb->asoc.smallest_mtu > net->mtu) {
4033                 sctp_pathmtu_adjustment(stcb, net->mtu);
4034         }
4035 #ifdef INET6
4036         if (newaddr->sa_family == AF_INET6) {
4037                 struct sockaddr_in6 *sin6;
4038
4039                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4040                 (void)sa6_recoverscope(sin6);
4041         }
4042 #endif
4043
4044         /* JRS - Use the congestion control given in the CC module */
4045         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4046                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4047
4048         /*
4049          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4050          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4051          */
4052         net->find_pseudo_cumack = 1;
4053         net->find_rtx_pseudo_cumack = 1;
4054         /* Choose an initial flowid. */
4055         net->flowid = stcb->asoc.my_vtag ^
4056             ntohs(stcb->rport) ^
4057             ntohs(stcb->sctp_ep->sctp_lport);
4058         net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4059         if (netp) {
4060                 *netp = net;
4061         }
4062         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4063         if (net->ro.ro_nh == NULL) {
4064                 /* Since we have no route put it at the back */
4065                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4066         } else if (netfirst == NULL) {
4067                 /* We are the first one in the pool. */
4068                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4069         } else if (netfirst->ro.ro_nh == NULL) {
4070                 /*
4071                  * First one has NO route. Place this one ahead of the first
4072                  * one.
4073                  */
4074                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4075         } else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) {
4076                 /*
4077                  * This one has a different interface than the one at the
4078                  * top of the list. Place it ahead.
4079                  */
4080                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4081         } else {
4082                 /*
4083                  * Ok we have the same interface as the first one. Move
4084                  * forward until we find either a) one with a NULL route...
4085                  * insert ahead of that b) one with a different ifp.. insert
4086                  * after that. c) end of the list.. insert at the tail.
4087                  */
4088                 struct sctp_nets *netlook;
4089
4090                 do {
4091                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4092                         if (netlook == NULL) {
4093                                 /* End of the list */
4094                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4095                                 break;
4096                         } else if (netlook->ro.ro_nh == NULL) {
4097                                 /* next one has NO route */
4098                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4099                                 break;
4100                         } else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) {
4101                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4102                                     net, sctp_next);
4103                                 break;
4104                         }
4105                         /* Shift forward */
4106                         netfirst = netlook;
4107                 } while (netlook != NULL);
4108         }
4109
4110         /* got to have a primary set */
4111         if (stcb->asoc.primary_destination == 0) {
4112                 stcb->asoc.primary_destination = net;
4113         } else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) &&
4114                     (net->ro.ro_nh) &&
4115             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4116                 /* No route to current primary adopt new primary */
4117                 stcb->asoc.primary_destination = net;
4118         }
4119         /* Validate primary is first */
4120         net = TAILQ_FIRST(&stcb->asoc.nets);
4121         if ((net != stcb->asoc.primary_destination) &&
4122             (stcb->asoc.primary_destination)) {
4123                 /*
4124                  * first one on the list is NOT the primary sctp_cmpaddr()
4125                  * is much more efficient if the primary is the first on the
4126                  * list, make it so.
4127                  */
4128                 TAILQ_REMOVE(&stcb->asoc.nets,
4129                     stcb->asoc.primary_destination, sctp_next);
4130                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4131                     stcb->asoc.primary_destination, sctp_next);
4132         }
4133         return (0);
4134 }
4135
4136 static uint32_t
4137 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4138 {
4139         uint32_t id;
4140         struct sctpasochead *head;
4141         struct sctp_tcb *lstcb;
4142
4143 try_again:
4144         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4145                 /* TSNH */
4146                 return (0);
4147         }
4148         /*
4149          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4150          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4151          */
4152         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4153                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4154         }
4155         id = inp->sctp_associd_counter;
4156         inp->sctp_associd_counter++;
4157         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4158         if (lstcb) {
4159                 goto try_again;
4160         }
4161         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4162         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4163         stcb->asoc.in_asocid_hash = 1;
4164         return (id);
4165 }
4166
4167 /*
4168  * allocate an association and add it to the endpoint. The caller must be
4169  * careful to add all additional addresses once they are know right away or
4170  * else the assoc will be may experience a blackout scenario.
4171  */
4172 struct sctp_tcb *
4173 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4174     int *error, uint32_t override_tag, uint32_t initial_tsn,
4175     uint32_t vrf_id, uint16_t o_streams, uint16_t port,
4176     struct thread *p,
4177     int initialize_auth_params)
4178 {
4179         /* note the p argument is only valid in unbound sockets */
4180
4181         struct sctp_tcb *stcb;
4182         struct sctp_association *asoc;
4183         struct sctpasochead *head;
4184         uint16_t rport;
4185         int err;
4186
4187         /*
4188          * Assumption made here: Caller has done a
4189          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4190          * address does not exist already.
4191          */
4192         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4193                 /* Hit max assoc, sorry no more */
4194                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4195                 *error = ENOBUFS;
4196                 return (NULL);
4197         }
4198         if (firstaddr == NULL) {
4199                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4200                 *error = EINVAL;
4201                 return (NULL);
4202         }
4203         SCTP_INP_RLOCK(inp);
4204         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4205             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4206             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4207                 /*
4208                  * If its in the TCP pool, its NOT allowed to create an
4209                  * association. The parent listener needs to call
4210                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4211                  * off, or connected one does this.. its an error.
4212                  */
4213                 SCTP_INP_RUNLOCK(inp);
4214                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4215                 *error = EINVAL;
4216                 return (NULL);
4217         }
4218         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4219             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4220                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4221                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4222                         SCTP_INP_RUNLOCK(inp);
4223                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4224                         *error = EINVAL;
4225                         return (NULL);
4226                 }
4227         }
4228         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4229 #ifdef SCTP_DEBUG
4230         if (firstaddr) {
4231                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4232                 switch (firstaddr->sa_family) {
4233 #ifdef INET
4234                 case AF_INET:
4235                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4236                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4237                         break;
4238 #endif
4239 #ifdef INET6
4240                 case AF_INET6:
4241                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4242                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4243                         break;
4244 #endif
4245                 default:
4246                         break;
4247                 }
4248         } else {
4249                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4250         }
4251 #endif                          /* SCTP_DEBUG */
4252         switch (firstaddr->sa_family) {
4253 #ifdef INET
4254         case AF_INET:
4255                 {
4256                         struct sockaddr_in *sin;
4257
4258                         sin = (struct sockaddr_in *)firstaddr;
4259                         if ((ntohs(sin->sin_port) == 0) ||
4260                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4261                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4262                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) ||
4263                             (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) != 0) &&
4264                             (SCTP_IPV6_V6ONLY(inp) != 0))) {
4265                                 /* Invalid address */
4266                                 SCTP_INP_RUNLOCK(inp);
4267                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4268                                 *error = EINVAL;
4269                                 return (NULL);
4270                         }
4271                         rport = sin->sin_port;
4272                         break;
4273                 }
4274 #endif
4275 #ifdef INET6
4276         case AF_INET6:
4277                 {
4278                         struct sockaddr_in6 *sin6;
4279
4280                         sin6 = (struct sockaddr_in6 *)firstaddr;
4281                         if ((ntohs(sin6->sin6_port) == 0) ||
4282                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4283                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) ||
4284                             ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)) {
4285                                 /* Invalid address */
4286                                 SCTP_INP_RUNLOCK(inp);
4287                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4288                                 *error = EINVAL;
4289                                 return (NULL);
4290                         }
4291                         rport = sin6->sin6_port;
4292                         break;
4293                 }
4294 #endif
4295         default:
4296                 /* not supported family type */
4297                 SCTP_INP_RUNLOCK(inp);
4298                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4299                 *error = EINVAL;
4300                 return (NULL);
4301         }
4302         SCTP_INP_RUNLOCK(inp);
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(inp->sctp_socket, 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         SCTP_TCB_SEND_LOCK_INIT(stcb);
4328         stcb->rport = rport;
4329         /* setup back pointer's */
4330         stcb->sctp_ep = inp;
4331         stcb->sctp_socket = inp->sctp_socket;
4332         if ((err = sctp_init_asoc(inp, stcb, override_tag, initial_tsn, vrf_id, o_streams))) {
4333                 /* failed */
4334                 SCTP_TCB_LOCK_DESTROY(stcb);
4335                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4336                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4337                 SCTP_DECR_ASOC_COUNT();
4338                 *error = err;
4339                 return (NULL);
4340         }
4341         /* and the port */
4342         SCTP_INP_INFO_WLOCK();
4343         SCTP_INP_WLOCK(inp);
4344         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4345                 /* inpcb freed while alloc going on */
4346                 SCTP_TCB_LOCK_DESTROY(stcb);
4347                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4348                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4349                 SCTP_INP_WUNLOCK(inp);
4350                 SCTP_INP_INFO_WUNLOCK();
4351                 SCTP_DECR_ASOC_COUNT();
4352                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4353                 *error = EINVAL;
4354                 return (NULL);
4355         }
4356         SCTP_TCB_LOCK(stcb);
4357
4358         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4359         /* now that my_vtag is set, add it to the hash */
4360         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4361         /* put it in the bucket in the vtag hash of assoc's for the system */
4362         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4363         SCTP_INP_INFO_WUNLOCK();
4364
4365         if (sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC)) {
4366                 /* failure.. memory error? */
4367                 if (asoc->strmout) {
4368                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4369                         asoc->strmout = NULL;
4370                 }
4371                 if (asoc->mapping_array) {
4372                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4373                         asoc->mapping_array = NULL;
4374                 }
4375                 if (asoc->nr_mapping_array) {
4376                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4377                         asoc->nr_mapping_array = NULL;
4378                 }
4379                 SCTP_DECR_ASOC_COUNT();
4380                 SCTP_TCB_UNLOCK(stcb);
4381                 SCTP_TCB_LOCK_DESTROY(stcb);
4382                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4383                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4384                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4385                 SCTP_INP_WUNLOCK(inp);
4386                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4387                 *error = ENOBUFS;
4388                 return (NULL);
4389         }
4390         /* Init all the timers */
4391         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4392         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4393         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4394         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4395         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4396         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4397
4398         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4399         /* now file the port under the hash as well */
4400         if (inp->sctp_tcbhash != NULL) {
4401                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4402                     inp->sctp_hashmark)];
4403                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4404         }
4405         if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) {
4406                 sctp_initialize_auth_params(inp, stcb);
4407         }
4408         SCTP_INP_WUNLOCK(inp);
4409         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4410         return (stcb);
4411 }
4412
4413 void
4414 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4415 {
4416         struct sctp_inpcb *inp;
4417         struct sctp_association *asoc;
4418
4419         inp = stcb->sctp_ep;
4420         asoc = &stcb->asoc;
4421         asoc->numnets--;
4422         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4423         if (net == asoc->primary_destination) {
4424                 /* Reset primary */
4425                 struct sctp_nets *lnet;
4426
4427                 lnet = TAILQ_FIRST(&asoc->nets);
4428                 /*
4429                  * Mobility adaptation Ideally, if deleted destination is
4430                  * the primary, it becomes a fast retransmission trigger by
4431                  * the subsequent SET PRIMARY. (by micchie)
4432                  */
4433                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4434                     SCTP_MOBILITY_BASE) ||
4435                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4436                     SCTP_MOBILITY_FASTHANDOFF)) {
4437                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4438                         if (asoc->deleted_primary != NULL) {
4439                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4440                                 goto out;
4441                         }
4442                         asoc->deleted_primary = net;
4443                         atomic_add_int(&net->ref_count, 1);
4444                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4445                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4446                         sctp_mobility_feature_on(stcb->sctp_ep,
4447                             SCTP_MOBILITY_PRIM_DELETED);
4448                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4449                             stcb->sctp_ep, stcb, NULL);
4450                 }
4451 out:
4452                 /* Try to find a confirmed primary */
4453                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4454         }
4455         if (net == asoc->last_data_chunk_from) {
4456                 /* Reset primary */
4457                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4458         }
4459         if (net == asoc->last_control_chunk_from) {
4460                 /* Clear net */
4461                 asoc->last_control_chunk_from = NULL;
4462         }
4463         if (net == asoc->last_net_cmt_send_started) {
4464                 /* Clear net */
4465                 asoc->last_net_cmt_send_started = NULL;
4466         }
4467         if (net == stcb->asoc.alternate) {
4468                 sctp_free_remote_addr(stcb->asoc.alternate);
4469                 stcb->asoc.alternate = NULL;
4470         }
4471         sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
4472             SCTP_FROM_SCTP_PCB + SCTP_LOC_9);
4473         sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
4474             SCTP_FROM_SCTP_PCB + SCTP_LOC_10);
4475         net->dest_state |= SCTP_ADDR_BEING_DELETED;
4476         sctp_free_remote_addr(net);
4477 }
4478
4479 /*
4480  * remove a remote endpoint address from an association, it will fail if the
4481  * address does not exist.
4482  */
4483 int
4484 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4485 {
4486         /*
4487          * Here we need to remove a remote address. This is quite simple, we
4488          * first find it in the list of address for the association
4489          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4490          * on that item. Note we do not allow it to be removed if there are
4491          * no other addresses.
4492          */
4493         struct sctp_association *asoc;
4494         struct sctp_nets *net, *nnet;
4495
4496         asoc = &stcb->asoc;
4497
4498         /* locate the address */
4499         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4500                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4501                         continue;
4502                 }
4503                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4504                     remaddr)) {
4505                         /* we found the guy */
4506                         if (asoc->numnets < 2) {
4507                                 /* Must have at LEAST two remote addresses */
4508                                 return (-1);
4509                         } else {
4510                                 sctp_remove_net(stcb, net);
4511                                 return (0);
4512                         }
4513                 }
4514         }
4515         /* not found. */
4516         return (-2);
4517 }
4518
4519 void
4520 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4521 {
4522         struct sctpvtaghead *chain;
4523         struct sctp_tagblock *twait_block;
4524         int found = 0;
4525         int i;
4526
4527         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4528         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4529                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4530                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4531                             (twait_block->vtag_block[i].lport == lport) &&
4532                             (twait_block->vtag_block[i].rport == rport)) {
4533                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4534                                 twait_block->vtag_block[i].v_tag = 0;
4535                                 twait_block->vtag_block[i].lport = 0;
4536                                 twait_block->vtag_block[i].rport = 0;
4537                                 found = 1;
4538                                 break;
4539                         }
4540                 }
4541                 if (found)
4542                         break;
4543         }
4544 }
4545
4546 int
4547 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4548 {
4549         struct sctpvtaghead *chain;
4550         struct sctp_tagblock *twait_block;
4551         int found = 0;
4552         int i;
4553
4554         SCTP_INP_INFO_WLOCK();
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].v_tag == tag) &&
4559                             (twait_block->vtag_block[i].lport == lport) &&
4560                             (twait_block->vtag_block[i].rport == rport)) {
4561                                 found = 1;
4562                                 break;
4563                         }
4564                 }
4565                 if (found)
4566                         break;
4567         }
4568         SCTP_INP_INFO_WUNLOCK();
4569         return (found);
4570 }
4571
4572 void
4573 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4574 {
4575         struct sctpvtaghead *chain;
4576         struct sctp_tagblock *twait_block;
4577         struct timeval now;
4578         int set, i;
4579
4580         if (time == 0) {
4581                 /* Its disabled */
4582                 return;
4583         }
4584         (void)SCTP_GETTIME_TIMEVAL(&now);
4585         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4586         set = 0;
4587         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4588                 /* Block(s) present, lets find space, and expire on the fly */
4589                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4590                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4591                             !set) {
4592                                 twait_block->vtag_block[i].tv_sec_at_expire =
4593                                     now.tv_sec + time;
4594                                 twait_block->vtag_block[i].v_tag = tag;
4595                                 twait_block->vtag_block[i].lport = lport;
4596                                 twait_block->vtag_block[i].rport = rport;
4597                                 set = 1;
4598                         } else if ((twait_block->vtag_block[i].v_tag) &&
4599                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4600                                 /* Audit expires this guy */
4601                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4602                                 twait_block->vtag_block[i].v_tag = 0;
4603                                 twait_block->vtag_block[i].lport = 0;
4604                                 twait_block->vtag_block[i].rport = 0;
4605                                 if (set == 0) {
4606                                         /* Reuse it for my new tag */
4607                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4608                                         twait_block->vtag_block[i].v_tag = tag;
4609                                         twait_block->vtag_block[i].lport = lport;
4610                                         twait_block->vtag_block[i].rport = rport;
4611                                         set = 1;
4612                                 }
4613                         }
4614                 }
4615                 if (set) {
4616                         /*
4617                          * We only do up to the block where we can place our
4618                          * tag for audits
4619                          */
4620                         break;
4621                 }
4622         }
4623         /* Need to add a new block to chain */
4624         if (!set) {
4625                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4626                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4627                 if (twait_block == NULL) {
4628                         return;
4629                 }
4630                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4631                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4632                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4633                 twait_block->vtag_block[0].v_tag = tag;
4634                 twait_block->vtag_block[0].lport = lport;
4635                 twait_block->vtag_block[0].rport = rport;
4636         }
4637 }
4638
4639 void
4640 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4641 {
4642         struct sctp_tmit_chunk *chk, *nchk;
4643         struct sctp_queued_to_read *control, *ncontrol;
4644
4645         TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) {
4646                 TAILQ_REMOVE(rh, control, next_instrm);
4647                 control->on_strm_q = 0;
4648                 if (control->on_read_q == 0) {
4649                         sctp_free_remote_addr(control->whoFrom);
4650                         if (control->data) {
4651                                 sctp_m_freem(control->data);
4652                                 control->data = NULL;
4653                         }
4654                 }
4655                 /* Reassembly free? */
4656                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
4657                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
4658                         if (chk->data) {
4659                                 sctp_m_freem(chk->data);
4660                                 chk->data = NULL;
4661                         }
4662                         if (chk->holds_key_ref)
4663                                 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4664                         sctp_free_remote_addr(chk->whoTo);
4665                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4666                         SCTP_DECR_CHK_COUNT();
4667                         /* sa_ignore FREED_MEMORY */
4668                 }
4669                 /*
4670                  * We don't free the address here since all the net's were
4671                  * freed above.
4672                  */
4673                 if (control->on_read_q == 0) {
4674                         sctp_free_a_readq(stcb, control);
4675                 }
4676         }
4677 }
4678
4679 /*-
4680  * Free the association after un-hashing the remote port. This
4681  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4682  * expect that the input to this function IS a locked TCB.
4683  * It will return 0, if it did NOT destroy the association (instead
4684  * it unlocks it. It will return NON-zero if it either destroyed the
4685  * association OR the association is already destroyed.
4686  */
4687 int
4688 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4689 {
4690         int i;
4691         struct sctp_association *asoc;
4692         struct sctp_nets *net, *nnet;
4693         struct sctp_laddr *laddr, *naddr;
4694         struct sctp_tmit_chunk *chk, *nchk;
4695         struct sctp_asconf_addr *aparam, *naparam;
4696         struct sctp_asconf_ack *aack, *naack;
4697         struct sctp_stream_reset_list *strrst, *nstrrst;
4698         struct sctp_queued_to_read *sq, *nsq;
4699         struct sctp_stream_queue_pending *sp, *nsp;
4700         sctp_sharedkey_t *shared_key, *nshared_key;
4701         struct socket *so;
4702
4703         /* first, lets purge the entry from the hash table. */
4704
4705 #ifdef SCTP_LOG_CLOSING
4706         sctp_log_closing(inp, stcb, 6);
4707 #endif
4708         if (stcb->asoc.state == 0) {
4709 #ifdef SCTP_LOG_CLOSING
4710                 sctp_log_closing(inp, NULL, 7);
4711 #endif
4712                 /* there is no asoc, really TSNH :-0 */
4713                 return (1);
4714         }
4715         SCTP_TCB_SEND_LOCK(stcb);
4716         if (stcb->asoc.alternate) {
4717                 sctp_free_remote_addr(stcb->asoc.alternate);
4718                 stcb->asoc.alternate = NULL;
4719         }
4720         /* TEMP CODE */
4721         if (stcb->freed_from_where == 0) {
4722                 /* Only record the first place free happened from */
4723                 stcb->freed_from_where = from_location;
4724         }
4725         /* TEMP CODE */
4726
4727         asoc = &stcb->asoc;
4728         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4729             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4730                 /* nothing around */
4731                 so = NULL;
4732         else
4733                 so = inp->sctp_socket;
4734
4735         /*
4736          * We used timer based freeing if a reader or writer is in the way.
4737          * So we first check if we are actually being called from a timer,
4738          * if so we abort early if a reader or writer is still in the way.
4739          */
4740         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4741             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4742                 /*
4743                  * is it the timer driving us? if so are the reader/writers
4744                  * gone?
4745                  */
4746                 if (stcb->asoc.refcnt) {
4747                         /* nope, reader or writer in the way */
4748                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4749                         /* no asoc destroyed */
4750                         SCTP_TCB_SEND_UNLOCK(stcb);
4751                         SCTP_TCB_UNLOCK(stcb);
4752 #ifdef SCTP_LOG_CLOSING
4753                         sctp_log_closing(inp, stcb, 8);
4754 #endif
4755                         return (0);
4756                 }
4757         }
4758         /* Now clean up any other timers */
4759         sctp_stop_association_timers(stcb, false);
4760         /* Now the read queue needs to be cleaned up (only once) */
4761         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4762                 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED);
4763                 SCTP_INP_READ_LOCK(inp);
4764                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4765                         if (sq->stcb == stcb) {
4766                                 sq->do_not_ref_stcb = 1;
4767                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4768                                 /*
4769                                  * If there is no end, there never will be
4770                                  * now.
4771                                  */
4772                                 if (sq->end_added == 0) {
4773                                         /* Held for PD-API clear that. */
4774                                         sq->pdapi_aborted = 1;
4775                                         sq->held_length = 0;
4776                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4777                                                 /*
4778                                                  * Need to add a PD-API
4779                                                  * aborted indication.
4780                                                  * Setting the control_pdapi
4781                                                  * assures that it will be
4782                                                  * added right after this
4783                                                  * msg.
4784                                                  */
4785                                                 uint32_t strseq;
4786
4787                                                 stcb->asoc.control_pdapi = sq;
4788                                                 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff);
4789                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4790                                                     stcb,
4791                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4792                                                     (void *)&strseq,
4793                                                     SCTP_SO_LOCKED);
4794                                                 stcb->asoc.control_pdapi = NULL;
4795                                         }
4796                                 }
4797                                 /* Add an end to wake them */
4798                                 sq->end_added = 1;
4799                         }
4800                 }
4801                 SCTP_INP_READ_UNLOCK(inp);
4802                 if (stcb->block_entry) {
4803                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4804                         stcb->block_entry->error = ECONNRESET;
4805                         stcb->block_entry = NULL;
4806                 }
4807         }
4808         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4809                 /*
4810                  * Someone holds a reference OR the socket is unaccepted
4811                  * yet.
4812                  */
4813                 if ((stcb->asoc.refcnt) ||
4814                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4815                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4816                         SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4817                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4818                 }
4819                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4820                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4821                         /* nothing around */
4822                         so = NULL;
4823                 if (so) {
4824                         /* Wake any reader/writers */
4825                         sctp_sorwakeup(inp, so);
4826                         sctp_sowwakeup(inp, so);
4827                 }
4828                 SCTP_TCB_SEND_UNLOCK(stcb);
4829                 SCTP_TCB_UNLOCK(stcb);
4830
4831 #ifdef SCTP_LOG_CLOSING
4832                 sctp_log_closing(inp, stcb, 9);
4833 #endif
4834                 /* no asoc destroyed */
4835                 return (0);
4836         }
4837 #ifdef SCTP_LOG_CLOSING
4838         sctp_log_closing(inp, stcb, 10);
4839 #endif
4840         /*
4841          * When I reach here, no others want to kill the assoc yet.. and I
4842          * own the lock. Now its possible an abort comes in when I do the
4843          * lock exchange below to grab all the locks to do the final take
4844          * out. to prevent this we increment the count, which will start a
4845          * timer and blow out above thus assuring us that we hold exclusive
4846          * killing of the asoc. Note that after getting back the TCB lock we
4847          * will go ahead and increment the counter back up and stop any
4848          * timer a passing stranger may have started :-S
4849          */
4850         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4851                 atomic_add_int(&stcb->asoc.refcnt, 1);
4852
4853                 SCTP_TCB_SEND_UNLOCK(stcb);
4854                 SCTP_TCB_UNLOCK(stcb);
4855                 SCTP_INP_INFO_WLOCK();
4856                 SCTP_INP_WLOCK(inp);
4857                 SCTP_TCB_LOCK(stcb);
4858                 SCTP_TCB_SEND_LOCK(stcb);
4859         }
4860         /* Double check the GONE flag */
4861         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4862             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4863                 /* nothing around */
4864                 so = NULL;
4865
4866         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4867             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4868                 /*
4869                  * For TCP type we need special handling when we are
4870                  * connected. We also include the peel'ed off ones to.
4871                  */
4872                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4873                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4874                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4875                         if (so) {
4876                                 SOCKBUF_LOCK(&so->so_rcv);
4877                                 so->so_state &= ~(SS_ISCONNECTING |
4878                                     SS_ISDISCONNECTING |
4879                                     SS_ISCONFIRMING |
4880                                     SS_ISCONNECTED);
4881                                 so->so_state |= SS_ISDISCONNECTED;
4882                                 socantrcvmore_locked(so);
4883                                 socantsendmore(so);
4884                                 sctp_sowwakeup(inp, so);
4885                                 sctp_sorwakeup(inp, so);
4886                                 SCTP_SOWAKEUP(so);
4887                         }
4888                 }
4889         }
4890
4891         /*
4892          * Make it invalid too, that way if its about to run it will abort
4893          * and return.
4894          */
4895         /* re-increment the lock */
4896         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4897                 atomic_add_int(&stcb->asoc.refcnt, -1);
4898         }
4899         if (stcb->asoc.refcnt) {
4900                 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4901                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4902                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4903                         SCTP_INP_INFO_WUNLOCK();
4904                         SCTP_INP_WUNLOCK(inp);
4905                 }
4906                 SCTP_TCB_SEND_UNLOCK(stcb);
4907                 SCTP_TCB_UNLOCK(stcb);
4908                 return (0);
4909         }
4910         asoc->state = 0;
4911         if (inp->sctp_tcbhash) {
4912                 LIST_REMOVE(stcb, sctp_tcbhash);
4913         }
4914         if (stcb->asoc.in_asocid_hash) {
4915                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4916         }
4917         if (inp->sctp_socket == NULL) {
4918                 stcb->sctp_socket = NULL;
4919         }
4920         /* Now lets remove it from the list of ALL associations in the EP */
4921         LIST_REMOVE(stcb, sctp_tcblist);
4922         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4923                 SCTP_INP_INCR_REF(inp);
4924                 SCTP_INP_WUNLOCK(inp);
4925         }
4926         /* pull from vtag hash */
4927         LIST_REMOVE(stcb, sctp_asocs);
4928         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4929             inp->sctp_lport, stcb->rport);
4930
4931         /*
4932          * Now restop the timers to be sure this is paranoia at is finest!
4933          */
4934         sctp_stop_association_timers(stcb, true);
4935
4936         /*
4937          * The chunk lists and such SHOULD be empty but we check them just
4938          * in case.
4939          */
4940         /* anything on the wheel needs to be removed */
4941         for (i = 0; i < asoc->streamoutcnt; i++) {
4942                 struct sctp_stream_out *outs;
4943
4944                 outs = &asoc->strmout[i];
4945                 /* now clean up any chunks here */
4946                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4947                         atomic_subtract_int(&asoc->stream_queue_cnt, 1);
4948                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4949                         stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1);
4950                         sctp_free_spbufspace(stcb, asoc, sp);
4951                         if (sp->data) {
4952                                 if (so) {
4953                                         /* Still an open socket - report */
4954                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4955                                             0, (void *)sp, SCTP_SO_LOCKED);
4956                                 }
4957                                 if (sp->data) {
4958                                         sctp_m_freem(sp->data);
4959                                         sp->data = NULL;
4960                                         sp->tail_mbuf = NULL;
4961                                         sp->length = 0;
4962                                 }
4963                         }
4964                         if (sp->net) {
4965                                 sctp_free_remote_addr(sp->net);
4966                                 sp->net = NULL;
4967                         }
4968                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4969                 }
4970         }
4971         /* sa_ignore FREED_MEMORY */
4972         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4973                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4974                 SCTP_FREE(strrst, SCTP_M_STRESET);
4975         }
4976         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4977                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4978                 if (sq->data) {
4979                         sctp_m_freem(sq->data);
4980                         sq->data = NULL;
4981                 }
4982                 sctp_free_remote_addr(sq->whoFrom);
4983                 sq->whoFrom = NULL;
4984                 sq->stcb = NULL;
4985                 /* Free the ctl entry */
4986                 sctp_free_a_readq(stcb, sq);
4987                 /* sa_ignore FREED_MEMORY */
4988         }
4989         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4990                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4991                 if (chk->data) {
4992                         sctp_m_freem(chk->data);
4993                         chk->data = NULL;
4994                 }
4995                 if (chk->holds_key_ref)
4996                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4997                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4998                 SCTP_DECR_CHK_COUNT();
4999                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
5000                 asoc->free_chunk_cnt--;
5001                 /* sa_ignore FREED_MEMORY */
5002         }
5003         /* pending send queue SHOULD be empty */
5004         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5005                 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5006                         asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5007 #ifdef INVARIANTS
5008                 } else {
5009                         panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5010 #endif
5011                 }
5012                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5013                 if (chk->data) {
5014                         if (so) {
5015                                 /* Still a socket? */
5016                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5017                                     0, chk, SCTP_SO_LOCKED);
5018                         }
5019                         if (chk->data) {
5020                                 sctp_m_freem(chk->data);
5021                                 chk->data = NULL;
5022                         }
5023                 }
5024                 if (chk->holds_key_ref)
5025                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5026                 if (chk->whoTo) {
5027                         sctp_free_remote_addr(chk->whoTo);
5028                         chk->whoTo = NULL;
5029                 }
5030                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5031                 SCTP_DECR_CHK_COUNT();
5032                 /* sa_ignore FREED_MEMORY */
5033         }
5034         /* sent queue SHOULD be empty */
5035         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5036                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5037                         if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5038                                 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5039 #ifdef INVARIANTS
5040                         } else {
5041                                 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5042 #endif
5043                         }
5044                 }
5045                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5046                 if (chk->data) {
5047                         if (so) {
5048                                 /* Still a socket? */
5049                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5050                                     0, chk, SCTP_SO_LOCKED);
5051                         }
5052                         if (chk->data) {
5053                                 sctp_m_freem(chk->data);
5054                                 chk->data = NULL;
5055                         }
5056                 }
5057                 if (chk->holds_key_ref)
5058                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5059                 sctp_free_remote_addr(chk->whoTo);
5060                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5061                 SCTP_DECR_CHK_COUNT();
5062                 /* sa_ignore FREED_MEMORY */
5063         }
5064 #ifdef INVARIANTS
5065         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5066                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5067                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5068                 }
5069         }
5070 #endif
5071         /* control queue MAY not be empty */
5072         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5073                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5074                 if (chk->data) {
5075                         sctp_m_freem(chk->data);
5076                         chk->data = NULL;
5077                 }
5078                 if (chk->holds_key_ref)
5079                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5080                 sctp_free_remote_addr(chk->whoTo);
5081                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5082                 SCTP_DECR_CHK_COUNT();
5083                 /* sa_ignore FREED_MEMORY */
5084         }
5085         /* ASCONF queue MAY not be empty */
5086         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5087                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5088                 if (chk->data) {
5089                         sctp_m_freem(chk->data);
5090                         chk->data = NULL;
5091                 }
5092                 if (chk->holds_key_ref)
5093                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5094                 sctp_free_remote_addr(chk->whoTo);
5095                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5096                 SCTP_DECR_CHK_COUNT();
5097                 /* sa_ignore FREED_MEMORY */
5098         }
5099         if (asoc->mapping_array) {
5100                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5101                 asoc->mapping_array = NULL;
5102         }
5103         if (asoc->nr_mapping_array) {
5104                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5105                 asoc->nr_mapping_array = NULL;
5106         }
5107         /* the stream outs */
5108         if (asoc->strmout) {
5109                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5110                 asoc->strmout = NULL;
5111         }
5112         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5113         if (asoc->strmin) {
5114                 for (i = 0; i < asoc->streamincnt; i++) {
5115                         sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5116                         sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5117                 }
5118                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5119                 asoc->strmin = NULL;
5120         }
5121         asoc->streamincnt = 0;
5122         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5123 #ifdef INVARIANTS
5124                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5125                         panic("no net's left alloc'ed, or list points to itself");
5126                 }
5127 #endif
5128                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5129                 sctp_free_remote_addr(net);
5130         }
5131         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5132                 /* sa_ignore FREED_MEMORY */
5133                 sctp_remove_laddr(laddr);
5134         }
5135
5136         /* pending asconf (address) parameters */
5137         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5138                 /* sa_ignore FREED_MEMORY */
5139                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5140                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5141         }
5142         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5143                 /* sa_ignore FREED_MEMORY */
5144                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5145                 if (aack->data != NULL) {
5146                         sctp_m_freem(aack->data);
5147                 }
5148                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5149         }
5150         /* clean up auth stuff */
5151         if (asoc->local_hmacs)
5152                 sctp_free_hmaclist(asoc->local_hmacs);
5153         if (asoc->peer_hmacs)
5154                 sctp_free_hmaclist(asoc->peer_hmacs);
5155
5156         if (asoc->local_auth_chunks)
5157                 sctp_free_chunklist(asoc->local_auth_chunks);
5158         if (asoc->peer_auth_chunks)
5159                 sctp_free_chunklist(asoc->peer_auth_chunks);
5160
5161         sctp_free_authinfo(&asoc->authinfo);
5162
5163         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5164                 LIST_REMOVE(shared_key, next);
5165                 sctp_free_sharedkey(shared_key);
5166                 /* sa_ignore FREED_MEMORY */
5167         }
5168
5169         /* Insert new items here :> */
5170
5171         /* Get rid of LOCK */
5172         SCTP_TCB_SEND_UNLOCK(stcb);
5173         SCTP_TCB_UNLOCK(stcb);
5174         SCTP_TCB_LOCK_DESTROY(stcb);
5175         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5176         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5177                 SCTP_INP_INFO_WUNLOCK();
5178                 SCTP_INP_RLOCK(inp);
5179         }
5180 #ifdef SCTP_TRACK_FREED_ASOCS
5181         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5182                 /* now clean up the tasoc itself */
5183                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5184                 SCTP_DECR_ASOC_COUNT();
5185         } else {
5186                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5187         }
5188 #else
5189         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5190         SCTP_DECR_ASOC_COUNT();
5191 #endif
5192         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5193                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5194                         /*
5195                          * If its NOT the inp_free calling us AND sctp_close
5196                          * as been called, we call back...
5197                          */
5198                         SCTP_INP_RUNLOCK(inp);
5199                         /*
5200                          * This will start the kill timer (if we are the
5201                          * last one) since we hold an increment yet. But
5202                          * this is the only safe way to do this since
5203                          * otherwise if the socket closes at the same time
5204                          * we are here we might collide in the cleanup.
5205                          */
5206                         sctp_inpcb_free(inp,
5207                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5208                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5209                         SCTP_INP_DECR_REF(inp);
5210                 } else {
5211                         /* The socket is still open. */
5212                         SCTP_INP_DECR_REF(inp);
5213                         SCTP_INP_RUNLOCK(inp);
5214                 }
5215         }
5216         /* destroyed the asoc */
5217 #ifdef SCTP_LOG_CLOSING
5218         sctp_log_closing(inp, NULL, 11);
5219 #endif
5220         return (1);
5221 }
5222
5223 /*
5224  * determine if a destination is "reachable" based upon the addresses bound
5225  * to the current endpoint (e.g. only v4 or v6 currently bound)
5226  */
5227 /*
5228  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5229  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5230  * types bound as its endpoint
5231  */
5232 int
5233 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5234 {
5235         struct sctp_inpcb *inp;
5236         int answer;
5237
5238         /*
5239          * No locks here, the TCB, in all cases is already locked and an
5240          * assoc is up. There is either a INP lock by the caller applied (in
5241          * asconf case when deleting an address) or NOT in the HB case,
5242          * however if HB then the INP increment is up and the INP will not
5243          * be removed (on top of the fact that we have a TCB lock). So we
5244          * only want to read the sctp_flags, which is either bound-all or
5245          * not.. no protection needed since once an assoc is up you can't be
5246          * changing your binding.
5247          */
5248         inp = stcb->sctp_ep;
5249         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5250                 /* if bound all, destination is not restricted */
5251                 /*
5252                  * RRS: Question during lock work: Is this correct? If you
5253                  * are bound-all you still might need to obey the V4--V6
5254                  * flags??? IMO this bound-all stuff needs to be removed!
5255                  */
5256                 return (1);
5257         }
5258         /* NOTE: all "scope" checks are done when local addresses are added */
5259         switch (destaddr->sa_family) {
5260 #ifdef INET6
5261         case AF_INET6:
5262                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5263                 break;
5264 #endif
5265 #ifdef INET
5266         case AF_INET:
5267                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5268                 break;
5269 #endif
5270         default:
5271                 /* invalid family, so it's unreachable */
5272                 answer = 0;
5273                 break;
5274         }
5275         return (answer);
5276 }
5277
5278 /*
5279  * update the inp_vflags on an endpoint
5280  */
5281 static void
5282 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5283 {
5284         struct sctp_laddr *laddr;
5285
5286         /* first clear the flag */
5287         inp->ip_inp.inp.inp_vflag = 0;
5288         /* set the flag based on addresses on the ep list */
5289         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5290                 if (laddr->ifa == NULL) {
5291                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5292                             __func__);
5293                         continue;
5294                 }
5295
5296                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5297                         continue;
5298                 }
5299                 switch (laddr->ifa->address.sa.sa_family) {
5300 #ifdef INET6
5301                 case AF_INET6:
5302                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5303                         break;
5304 #endif
5305 #ifdef INET
5306                 case AF_INET:
5307                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5308                         break;
5309 #endif
5310                 default:
5311                         break;
5312                 }
5313         }
5314 }
5315
5316 /*
5317  * Add the address to the endpoint local address list There is nothing to be
5318  * done if we are bound to all addresses
5319  */
5320 void
5321 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5322 {
5323         struct sctp_laddr *laddr;
5324         struct sctp_tcb *stcb;
5325         int fnd, error = 0;
5326
5327         fnd = 0;
5328
5329         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5330                 /* You are already bound to all. You have it already */
5331                 return;
5332         }
5333 #ifdef INET6
5334         if (ifa->address.sa.sa_family == AF_INET6) {
5335                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5336                         /* Can't bind a non-useable addr. */
5337                         return;
5338                 }
5339         }
5340 #endif
5341         /* first, is it already present? */
5342         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5343                 if (laddr->ifa == ifa) {
5344                         fnd = 1;
5345                         break;
5346                 }
5347         }
5348
5349         if (fnd == 0) {
5350                 /* Not in the ep list */
5351                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5352                 if (error != 0)
5353                         return;
5354                 inp->laddr_count++;
5355                 /* update inp_vflag flags */
5356                 switch (ifa->address.sa.sa_family) {
5357 #ifdef INET6
5358                 case AF_INET6:
5359                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5360                         break;
5361 #endif
5362 #ifdef INET
5363                 case AF_INET:
5364                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5365                         break;
5366 #endif
5367                 default:
5368                         break;
5369                 }
5370                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5371                         sctp_add_local_addr_restricted(stcb, ifa);
5372                 }
5373         }
5374         return;
5375 }
5376
5377 /*
5378  * select a new (hopefully reachable) destination net (should only be used
5379  * when we deleted an ep addr that is the only usable source address to reach
5380  * the destination net)
5381  */
5382 static void
5383 sctp_select_primary_destination(struct sctp_tcb *stcb)
5384 {
5385         struct sctp_nets *net;
5386
5387         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5388                 /* for now, we'll just pick the first reachable one we find */
5389                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5390                         continue;
5391                 if (sctp_destination_is_reachable(stcb,
5392                     (struct sockaddr *)&net->ro._l_addr)) {
5393                         /* found a reachable destination */
5394                         stcb->asoc.primary_destination = net;
5395                 }
5396         }
5397         /* I can't there from here! ...we're gonna die shortly... */
5398 }
5399
5400 /*
5401  * Delete the address from the endpoint local address list. There is nothing
5402  * to be done if we are bound to all addresses
5403  */
5404 void
5405 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5406 {
5407         struct sctp_laddr *laddr;
5408         int fnd;
5409
5410         fnd = 0;
5411         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5412                 /* You are already bound to all. You have it already */
5413                 return;
5414         }
5415         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5416                 if (laddr->ifa == ifa) {
5417                         fnd = 1;
5418                         break;
5419                 }
5420         }
5421         if (fnd && (inp->laddr_count < 2)) {
5422                 /* can't delete unless there are at LEAST 2 addresses */
5423                 return;
5424         }
5425         if (fnd) {
5426                 /*
5427                  * clean up any use of this address go through our
5428                  * associations and clear any last_used_address that match
5429                  * this one for each assoc, see if a new primary_destination
5430                  * is needed
5431                  */
5432                 struct sctp_tcb *stcb;
5433
5434                 /* clean up "next_addr_touse" */
5435                 if (inp->next_addr_touse == laddr)
5436                         /* delete this address */
5437                         inp->next_addr_touse = NULL;
5438
5439                 /* clean up "last_used_address" */
5440                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5441                         struct sctp_nets *net;
5442
5443                         SCTP_TCB_LOCK(stcb);
5444                         if (stcb->asoc.last_used_address == laddr)
5445                                 /* delete this address */
5446                                 stcb->asoc.last_used_address = NULL;
5447                         /*
5448                          * Now spin through all the nets and purge any ref
5449                          * to laddr
5450                          */
5451                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5452                                 if (net->ro._s_addr == laddr->ifa) {
5453                                         /* Yep, purge src address selected */
5454                                         RO_NHFREE(&net->ro);
5455                                         sctp_free_ifa(net->ro._s_addr);
5456                                         net->ro._s_addr = NULL;
5457                                         net->src_addr_selected = 0;
5458                                 }
5459                         }
5460                         SCTP_TCB_UNLOCK(stcb);
5461                 }               /* for each tcb */
5462                 /* remove it from the ep list */
5463                 sctp_remove_laddr(laddr);
5464                 inp->laddr_count--;
5465                 /* update inp_vflag flags */
5466                 sctp_update_ep_vflag(inp);
5467         }
5468         return;
5469 }
5470
5471 /*
5472  * Add the address to the TCB local address restricted list.
5473  * This is a "pending" address list (eg. addresses waiting for an
5474  * ASCONF-ACK response) and cannot be used as a valid source address.
5475  */
5476 void
5477 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5478 {
5479         struct sctp_laddr *laddr;
5480         struct sctpladdr *list;
5481
5482         /*
5483          * Assumes TCB is locked.. and possibly the INP. May need to
5484          * confirm/fix that if we need it and is not the case.
5485          */
5486         list = &stcb->asoc.sctp_restricted_addrs;
5487
5488 #ifdef INET6
5489         if (ifa->address.sa.sa_family == AF_INET6) {
5490                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5491                         /* Can't bind a non-existent addr. */
5492                         return;
5493                 }
5494         }
5495 #endif
5496         /* does the address already exist? */
5497         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5498                 if (laddr->ifa == ifa) {
5499                         return;
5500                 }
5501         }
5502
5503         /* add to the list */
5504         (void)sctp_insert_laddr(list, ifa, 0);
5505         return;
5506 }
5507
5508 /*
5509  * Remove a local address from the TCB local address restricted list
5510  */
5511 void
5512 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5513 {
5514         struct sctp_inpcb *inp;
5515         struct sctp_laddr *laddr;
5516
5517         /*
5518          * This is called by asconf work. It is assumed that a) The TCB is
5519          * locked and b) The INP is locked. This is true in as much as I can
5520          * trace through the entry asconf code where I did these locks.
5521          * Again, the ASCONF code is a bit different in that it does lock
5522          * the INP during its work often times. This must be since we don't
5523          * want other proc's looking up things while what they are looking
5524          * up is changing :-D
5525          */
5526
5527         inp = stcb->sctp_ep;
5528         /* if subset bound and don't allow ASCONF's, can't delete last */
5529         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5530             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5531                 if (stcb->sctp_ep->laddr_count < 2) {
5532                         /* can't delete last address */
5533                         return;
5534                 }
5535         }
5536         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5537                 /* remove the address if it exists */
5538                 if (laddr->ifa == NULL)
5539                         continue;
5540                 if (laddr->ifa == ifa) {
5541                         sctp_remove_laddr(laddr);
5542                         return;
5543                 }
5544         }
5545
5546         /* address not found! */
5547         return;
5548 }
5549
5550 /* sysctl */
5551 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5552 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5553
5554 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5555 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5556 int *sctp_cpuarry = NULL;
5557
5558 void
5559 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5560 {
5561         /* Queue a packet to a processor for the specified core */
5562         struct sctp_mcore_queue *qent;
5563         struct sctp_mcore_ctrl *wkq;
5564         int need_wake = 0;
5565
5566         if (sctp_mcore_workers == NULL) {
5567                 /* Something went way bad during setup */
5568                 sctp_input_with_port(m, off, 0);
5569                 return;
5570         }
5571         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5572             (sizeof(struct sctp_mcore_queue)),
5573             SCTP_M_MCORE);
5574         if (qent == NULL) {
5575                 /* This is trouble  */
5576                 sctp_input_with_port(m, off, 0);
5577                 return;
5578         }
5579         qent->vn = curvnet;
5580         qent->m = m;
5581         qent->off = off;
5582         qent->v6 = 0;
5583         wkq = &sctp_mcore_workers[cpu_to_use];
5584         SCTP_MCORE_QLOCK(wkq);
5585
5586         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5587         if (wkq->running == 0) {
5588                 need_wake = 1;
5589         }
5590         SCTP_MCORE_QUNLOCK(wkq);
5591         if (need_wake) {
5592                 wakeup(&wkq->running);
5593         }
5594 }
5595
5596 static void
5597 sctp_mcore_thread(void *arg)
5598 {
5599
5600         struct sctp_mcore_ctrl *wkq;
5601         struct sctp_mcore_queue *qent;
5602
5603         wkq = (struct sctp_mcore_ctrl *)arg;
5604         struct mbuf *m;
5605         int off, v6;
5606
5607         /* Wait for first tickle */
5608         SCTP_MCORE_LOCK(wkq);
5609         wkq->running = 0;
5610         msleep(&wkq->running,
5611             &wkq->core_mtx,
5612             0, "wait for pkt", 0);
5613         SCTP_MCORE_UNLOCK(wkq);
5614
5615         /* Bind to our cpu */
5616         thread_lock(curthread);
5617         sched_bind(curthread, wkq->cpuid);
5618         thread_unlock(curthread);
5619
5620         /* Now lets start working */
5621         SCTP_MCORE_LOCK(wkq);
5622         /* Now grab lock and go */
5623         for (;;) {
5624                 SCTP_MCORE_QLOCK(wkq);
5625 skip_sleep:
5626                 wkq->running = 1;
5627                 qent = TAILQ_FIRST(&wkq->que);
5628                 if (qent) {
5629                         TAILQ_REMOVE(&wkq->que, qent, next);
5630                         SCTP_MCORE_QUNLOCK(wkq);
5631                         CURVNET_SET(qent->vn);
5632                         m = qent->m;
5633                         off = qent->off;
5634                         v6 = qent->v6;
5635                         SCTP_FREE(qent, SCTP_M_MCORE);
5636                         if (v6 == 0) {
5637                                 sctp_input_with_port(m, off, 0);
5638                         } else {
5639                                 SCTP_PRINTF("V6 not yet supported\n");
5640                                 sctp_m_freem(m);
5641                         }
5642                         CURVNET_RESTORE();
5643                         SCTP_MCORE_QLOCK(wkq);
5644                 }
5645                 wkq->running = 0;
5646                 if (!TAILQ_EMPTY(&wkq->que)) {
5647                         goto skip_sleep;
5648                 }
5649                 SCTP_MCORE_QUNLOCK(wkq);
5650                 msleep(&wkq->running,
5651                     &wkq->core_mtx,
5652                     0, "wait for pkt", 0);
5653         }
5654 }
5655
5656 static void
5657 sctp_startup_mcore_threads(void)
5658 {
5659         int i, cpu;
5660
5661         if (mp_ncpus == 1)
5662                 return;
5663
5664         if (sctp_mcore_workers != NULL) {
5665                 /*
5666                  * Already been here in some previous vnet?
5667                  */
5668                 return;
5669         }
5670         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5671             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5672             SCTP_M_MCORE);
5673         if (sctp_mcore_workers == NULL) {
5674                 /* TSNH I hope */
5675                 return;
5676         }
5677         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5678             sizeof(struct sctp_mcore_ctrl)));
5679         /* Init the structures */
5680         for (i = 0; i <= mp_maxid; i++) {
5681                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5682                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5683                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5684                 sctp_mcore_workers[i].cpuid = i;
5685         }
5686         if (sctp_cpuarry == NULL) {
5687                 SCTP_MALLOC(sctp_cpuarry, int *,
5688                     (mp_ncpus * sizeof(int)),
5689                     SCTP_M_MCORE);
5690                 i = 0;
5691                 CPU_FOREACH(cpu) {
5692                         sctp_cpuarry[i] = cpu;
5693                         i++;
5694                 }
5695         }
5696         /* Now start them all */
5697         CPU_FOREACH(cpu) {
5698                 (void)kproc_create(sctp_mcore_thread,
5699                     (void *)&sctp_mcore_workers[cpu],
5700                     &sctp_mcore_workers[cpu].thread_proc,
5701                     0,
5702                     SCTP_KTHREAD_PAGES,
5703                     SCTP_MCORE_NAME);
5704         }
5705 }
5706 #endif
5707
5708 void
5709 sctp_pcb_init(void)
5710 {
5711         /*
5712          * SCTP initialization for the PCB structures should be called by
5713          * the sctp_init() function.
5714          */
5715         int i;
5716         struct timeval tv;
5717
5718         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5719                 /* error I was called twice */
5720                 return;
5721         }
5722         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5723
5724 #if defined(SCTP_LOCAL_TRACE_BUF)
5725         memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log));
5726 #endif
5727 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5728         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5729             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5730             SCTP_M_MCORE);
5731 #endif
5732         (void)SCTP_GETTIME_TIMEVAL(&tv);
5733 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5734         memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1));
5735         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
5736         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
5737 #else
5738         memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat));
5739         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
5740         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
5741 #endif
5742         /* init the empty list of (All) Endpoints */
5743         LIST_INIT(&SCTP_BASE_INFO(listhead));
5744
5745         /* init the hash table of endpoints */
5746         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5747         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5748         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5749         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5750             &SCTP_BASE_INFO(hashasocmark));
5751         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5752             &SCTP_BASE_INFO(hashmark));
5753         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5754             &SCTP_BASE_INFO(hashtcpmark));
5755         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5756         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5757             &SCTP_BASE_INFO(hashvrfmark));
5758
5759         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5760             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5761         /* init the zones */
5762         /*
5763          * FIX ME: Should check for NULL returns, but if it does fail we are
5764          * doomed to panic anyways... add later maybe.
5765          */
5766         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5767             sizeof(struct sctp_inpcb), maxsockets);
5768
5769         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5770             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5771
5772         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5773             sizeof(struct sctp_laddr),
5774             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5775
5776         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5777             sizeof(struct sctp_nets),
5778             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5779
5780         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5781             sizeof(struct sctp_tmit_chunk),
5782             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5783
5784         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5785             sizeof(struct sctp_queued_to_read),
5786             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5787
5788         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5789             sizeof(struct sctp_stream_queue_pending),
5790             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5791
5792         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5793             sizeof(struct sctp_asconf),
5794             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5795
5796         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5797             sizeof(struct sctp_asconf_ack),
5798             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5799
5800         /* Master Lock INIT for info structure */
5801         SCTP_INP_INFO_LOCK_INIT();
5802         SCTP_STATLOG_INIT_LOCK();
5803
5804         SCTP_IPI_COUNT_INIT();
5805         SCTP_IPI_ADDR_INIT();
5806 #ifdef SCTP_PACKET_LOGGING
5807         SCTP_IP_PKTLOG_INIT();
5808 #endif
5809         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5810
5811         SCTP_WQ_ADDR_INIT();
5812         /* not sure if we need all the counts */
5813         SCTP_BASE_INFO(ipi_count_ep) = 0;
5814         /* assoc/tcb zone info */
5815         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5816         /* local addrlist zone info */
5817         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5818         /* remote addrlist zone info */
5819         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5820         /* chunk info */
5821         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5822
5823         /* socket queue zone info */
5824         SCTP_BASE_INFO(ipi_count_readq) = 0;
5825
5826         /* stream out queue cont */
5827         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5828
5829         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5830         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5831
5832         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5833
5834         /* Init the TIMEWAIT list */
5835         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5836                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5837         }
5838         sctp_startup_iterator();
5839
5840 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5841         sctp_startup_mcore_threads();
5842 #endif
5843
5844         /*
5845          * INIT the default VRF which for BSD is the only one, other O/S's
5846          * may have more. But initially they must start with one and then
5847          * add the VRF's as addresses are added.
5848          */
5849         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5850 }
5851
5852 /*
5853  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5854  */
5855 void
5856 sctp_pcb_finish(void)
5857 {
5858         struct sctp_vrflist *vrf_bucket;
5859         struct sctp_vrf *vrf, *nvrf;
5860         struct sctp_ifn *ifn, *nifn;
5861         struct sctp_ifa *ifa, *nifa;
5862         struct sctpvtaghead *chain;
5863         struct sctp_tagblock *twait_block, *prev_twait_block;
5864         struct sctp_laddr *wi, *nwi;
5865         int i;
5866         struct sctp_iterator *it, *nit;
5867
5868         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5869                 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5870                 return;
5871         }
5872         SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5873         /*
5874          * In FreeBSD the iterator thread never exits but we do clean up.
5875          * The only way FreeBSD reaches here is if we have VRF's but we
5876          * still add the ifdef to make it compile on old versions.
5877          */
5878 retry:
5879         SCTP_IPI_ITERATOR_WQ_LOCK();
5880         /*
5881          * sctp_iterator_worker() might be working on an it entry without
5882          * holding the lock.  We won't find it on the list either and
5883          * continue and free/destroy it.  While holding the lock, spin, to
5884          * avoid the race condition as sctp_iterator_worker() will have to
5885          * wait to re-acquire the lock.
5886          */
5887         if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5888                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5889                 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5890                     "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5891                 DELAY(10);
5892                 goto retry;
5893         }
5894         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5895                 if (it->vn != curvnet) {
5896                         continue;
5897                 }
5898                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5899                 if (it->function_atend != NULL) {
5900                         (*it->function_atend) (it->pointer, it->val);
5901                 }
5902                 SCTP_FREE(it, SCTP_M_ITER);
5903         }
5904         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5905         SCTP_ITERATOR_LOCK();
5906         if ((sctp_it_ctl.cur_it) &&
5907             (sctp_it_ctl.cur_it->vn == curvnet)) {
5908                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5909         }
5910         SCTP_ITERATOR_UNLOCK();
5911         SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5912         SCTP_WQ_ADDR_LOCK();
5913         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5914                 LIST_REMOVE(wi, sctp_nxt_addr);
5915                 SCTP_DECR_LADDR_COUNT();
5916                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5917                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
5918                 }
5919                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5920         }
5921         SCTP_WQ_ADDR_UNLOCK();
5922
5923         /*
5924          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5925          * destroyed first).
5926          */
5927         SCTP_IPI_ADDR_WLOCK();
5928         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5929         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5930                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5931                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5932                                 /* free the ifa */
5933                                 LIST_REMOVE(ifa, next_bucket);
5934                                 LIST_REMOVE(ifa, next_ifa);
5935                                 SCTP_FREE(ifa, SCTP_M_IFA);
5936                         }
5937                         /* free the ifn */
5938                         LIST_REMOVE(ifn, next_bucket);
5939                         LIST_REMOVE(ifn, next_ifn);
5940                         SCTP_FREE(ifn, SCTP_M_IFN);
5941                 }
5942                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5943                 /* free the vrf */
5944                 LIST_REMOVE(vrf, next_vrf);
5945                 SCTP_FREE(vrf, SCTP_M_VRF);
5946         }
5947         SCTP_IPI_ADDR_WUNLOCK();
5948         /* free the vrf hashes */
5949         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5950         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5951
5952         /*
5953          * free the TIMEWAIT list elements malloc'd in the function
5954          * sctp_add_vtag_to_timewait()...
5955          */
5956         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5957                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5958                 if (!LIST_EMPTY(chain)) {
5959                         prev_twait_block = NULL;
5960                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5961                                 if (prev_twait_block) {
5962                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5963                                 }
5964                                 prev_twait_block = twait_block;
5965                         }
5966                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5967                 }
5968         }
5969
5970         /* free the locks and mutexes */
5971 #ifdef SCTP_PACKET_LOGGING
5972         SCTP_IP_PKTLOG_DESTROY();
5973 #endif
5974         SCTP_IPI_ADDR_DESTROY();
5975         SCTP_STATLOG_DESTROY();
5976         SCTP_INP_INFO_LOCK_DESTROY();
5977
5978         SCTP_WQ_ADDR_DESTROY();
5979
5980         /* Get rid of other stuff too. */
5981         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5982                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5983         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5984                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5985         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5986                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5987
5988         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5989         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5990         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5991         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5992         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5993         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5994         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5995         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5996         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5997 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5998         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
5999 #endif
6000 }
6001
6002 int
6003 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6004     int offset, int limit,
6005     struct sockaddr *src, struct sockaddr *dst,
6006     struct sockaddr *altsa, uint16_t port)
6007 {
6008         /*
6009          * grub through the INIT pulling addresses and loading them to the
6010          * nets structure in the asoc. The from address in the mbuf should
6011          * also be loaded (if it is not already). This routine can be called
6012          * with either INIT or INIT-ACK's as long as the m points to the IP
6013          * packet and the offset points to the beginning of the parameters.
6014          */
6015         struct sctp_inpcb *inp;
6016         struct sctp_nets *net, *nnet, *net_tmp;
6017         struct sctp_paramhdr *phdr, param_buf;
6018         struct sctp_tcb *stcb_tmp;
6019         uint16_t ptype, plen;
6020         struct sockaddr *sa;
6021         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6022         struct sctp_auth_random *p_random = NULL;
6023         uint16_t random_len = 0;
6024         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6025         struct sctp_auth_hmac_algo *hmacs = NULL;
6026         uint16_t hmacs_len = 0;
6027         uint8_t saw_asconf = 0;
6028         uint8_t saw_asconf_ack = 0;
6029         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6030         struct sctp_auth_chunk_list *chunks = NULL;
6031         uint16_t num_chunks = 0;
6032         sctp_key_t *new_key;
6033         uint32_t keylen;
6034         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6035         uint8_t peer_supports_ecn;
6036         uint8_t peer_supports_prsctp;
6037         uint8_t peer_supports_auth;
6038         uint8_t peer_supports_asconf;
6039         uint8_t peer_supports_asconf_ack;
6040         uint8_t peer_supports_reconfig;
6041         uint8_t peer_supports_nrsack;
6042         uint8_t peer_supports_pktdrop;
6043         uint8_t peer_supports_idata;
6044 #ifdef INET
6045         struct sockaddr_in sin;
6046 #endif
6047 #ifdef INET6
6048         struct sockaddr_in6 sin6;
6049 #endif
6050
6051         /* First get the destination address setup too. */
6052 #ifdef INET
6053         memset(&sin, 0, sizeof(sin));
6054         sin.sin_family = AF_INET;
6055         sin.sin_len = sizeof(sin);
6056         sin.sin_port = stcb->rport;
6057 #endif
6058 #ifdef INET6
6059         memset(&sin6, 0, sizeof(sin6));
6060         sin6.sin6_family = AF_INET6;
6061         sin6.sin6_len = sizeof(struct sockaddr_in6);
6062         sin6.sin6_port = stcb->rport;
6063 #endif
6064         if (altsa) {
6065                 sa = altsa;
6066         } else {
6067                 sa = src;
6068         }
6069         peer_supports_idata = 0;
6070         peer_supports_ecn = 0;
6071         peer_supports_prsctp = 0;
6072         peer_supports_auth = 0;
6073         peer_supports_asconf = 0;
6074         peer_supports_asconf_ack = 0;
6075         peer_supports_reconfig = 0;
6076         peer_supports_nrsack = 0;
6077         peer_supports_pktdrop = 0;
6078         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6079                 /* mark all addresses that we have currently on the list */
6080                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6081         }
6082         /* does the source address already exist? if so skip it */
6083         inp = stcb->sctp_ep;
6084         atomic_add_int(&stcb->asoc.refcnt, 1);
6085         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6086         atomic_add_int(&stcb->asoc.refcnt, -1);
6087
6088         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6089                 /* we must add the source address */
6090                 /* no scope set here since we have a tcb already. */
6091                 switch (sa->sa_family) {
6092 #ifdef INET
6093                 case AF_INET:
6094                         if (stcb->asoc.scope.ipv4_addr_legal) {
6095                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6096                                         return (-1);
6097                                 }
6098                         }
6099                         break;
6100 #endif
6101 #ifdef INET6
6102                 case AF_INET6:
6103                         if (stcb->asoc.scope.ipv6_addr_legal) {
6104                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6105                                         return (-2);
6106                                 }
6107                         }
6108                         break;
6109 #endif
6110                 default:
6111                         break;
6112                 }
6113         } else {
6114                 if (net_tmp != NULL && stcb_tmp == stcb) {
6115                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6116                 } else if (stcb_tmp != stcb) {
6117                         /* It belongs to another association? */
6118                         if (stcb_tmp)
6119                                 SCTP_TCB_UNLOCK(stcb_tmp);
6120                         return (-3);
6121                 }
6122         }
6123         if (stcb->asoc.state == 0) {
6124                 /* the assoc was freed? */
6125                 return (-4);
6126         }
6127         /* now we must go through each of the params. */
6128         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
6129         while (phdr) {
6130                 ptype = ntohs(phdr->param_type);
6131                 plen = ntohs(phdr->param_length);
6132                 /*
6133                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6134                  * (uint32_t)ptype, (int)plen);
6135                  */
6136                 if (offset + plen > limit) {
6137                         break;
6138                 }
6139                 if (plen < sizeof(struct sctp_paramhdr)) {
6140                         break;
6141                 }
6142 #ifdef INET
6143                 if (ptype == SCTP_IPV4_ADDRESS) {
6144                         if (stcb->asoc.scope.ipv4_addr_legal) {
6145                                 struct sctp_ipv4addr_param *p4, p4_buf;
6146
6147                                 /* ok get the v4 address and check/add */
6148                                 phdr = sctp_get_next_param(m, offset,
6149                                     (struct sctp_paramhdr *)&p4_buf,
6150                                     sizeof(p4_buf));
6151                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6152                                     phdr == NULL) {
6153                                         return (-5);
6154                                 }
6155                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6156                                 sin.sin_addr.s_addr = p4->addr;
6157                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6158                                         /* Skip multi-cast addresses */
6159                                         goto next_param;
6160                                 }
6161                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6162                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6163                                         goto next_param;
6164                                 }
6165                                 sa = (struct sockaddr *)&sin;
6166                                 inp = stcb->sctp_ep;
6167                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6168                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6169                                     dst, stcb);
6170                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6171
6172                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6173                                     inp == NULL) {
6174                                         /* we must add the source address */
6175                                         /*
6176                                          * no scope set since we have a tcb
6177                                          * already
6178                                          */
6179
6180                                         /*
6181                                          * we must validate the state again
6182                                          * here
6183                                          */
6184                         add_it_now:
6185                                         if (stcb->asoc.state == 0) {
6186                                                 /* the assoc was freed? */
6187                                                 return (-7);
6188                                         }
6189                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6190                                                 return (-8);
6191                                         }
6192                                 } else if (stcb_tmp == stcb) {
6193                                         if (stcb->asoc.state == 0) {
6194                                                 /* the assoc was freed? */
6195                                                 return (-10);
6196                                         }
6197                                         if (net != NULL) {
6198                                                 /* clear flag */
6199                                                 net->dest_state &=
6200                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6201                                         }
6202                                 } else {
6203                                         /*
6204                                          * strange, address is in another
6205                                          * assoc? straighten out locks.
6206                                          */
6207                                         if (stcb_tmp) {
6208                                                 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6209                                                         struct mbuf *op_err;
6210                                                         char msg[SCTP_DIAG_INFO_LEN];
6211
6212                                                         /*
6213                                                          * in setup state we
6214                                                          * abort this guy
6215                                                          */
6216                                                         SCTP_SNPRINTF(msg, sizeof(msg),
6217                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6218                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6219                                                             msg);
6220                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6221                                                             stcb_tmp, op_err, false,
6222                                                             SCTP_SO_NOT_LOCKED);
6223                                                         goto add_it_now;
6224                                                 }
6225                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6226                                         }
6227
6228                                         if (stcb->asoc.state == 0) {
6229                                                 /* the assoc was freed? */
6230                                                 return (-12);
6231                                         }
6232                                         return (-13);
6233                                 }
6234                         }
6235                 } else
6236 #endif
6237 #ifdef INET6
6238                 if (ptype == SCTP_IPV6_ADDRESS) {
6239                         if (stcb->asoc.scope.ipv6_addr_legal) {
6240                                 /* ok get the v6 address and check/add */
6241                                 struct sctp_ipv6addr_param *p6, p6_buf;
6242
6243                                 phdr = sctp_get_next_param(m, offset,
6244                                     (struct sctp_paramhdr *)&p6_buf,
6245                                     sizeof(p6_buf));
6246                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6247                                     phdr == NULL) {
6248                                         return (-14);
6249                                 }
6250                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6251                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6252                                     sizeof(p6->addr));
6253                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6254                                         /* Skip multi-cast addresses */
6255                                         goto next_param;
6256                                 }
6257                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6258                                         /*
6259                                          * Link local make no sense without
6260                                          * scope
6261                                          */
6262                                         goto next_param;
6263                                 }
6264                                 sa = (struct sockaddr *)&sin6;
6265                                 inp = stcb->sctp_ep;
6266                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6267                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6268                                     dst, stcb);
6269                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6270                                 if (stcb_tmp == NULL &&
6271                                     (inp == stcb->sctp_ep || inp == NULL)) {
6272                                         /*
6273                                          * we must validate the state again
6274                                          * here
6275                                          */
6276                         add_it_now6:
6277                                         if (stcb->asoc.state == 0) {
6278                                                 /* the assoc was freed? */
6279                                                 return (-16);
6280                                         }
6281                                         /*
6282                                          * we must add the address, no scope
6283                                          * set
6284                                          */
6285                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6286                                                 return (-17);
6287                                         }
6288                                 } else if (stcb_tmp == stcb) {
6289                                         /*
6290                                          * we must validate the state again
6291                                          * here
6292                                          */
6293                                         if (stcb->asoc.state == 0) {
6294                                                 /* the assoc was freed? */
6295                                                 return (-19);
6296                                         }
6297                                         if (net != NULL) {
6298                                                 /* clear flag */
6299                                                 net->dest_state &=
6300                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6301                                         }
6302                                 } else {
6303                                         /*
6304                                          * strange, address is in another
6305                                          * assoc? straighten out locks.
6306                                          */
6307                                         if (stcb_tmp) {
6308                                                 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6309                                                         struct mbuf *op_err;
6310                                                         char msg[SCTP_DIAG_INFO_LEN];
6311
6312                                                         /*
6313                                                          * in setup state we
6314                                                          * abort this guy
6315                                                          */
6316                                                         SCTP_SNPRINTF(msg, sizeof(msg),
6317                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6318                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6319                                                             msg);
6320                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6321                                                             stcb_tmp, op_err, false,
6322                                                             SCTP_SO_NOT_LOCKED);
6323                                                         goto add_it_now6;
6324                                                 }
6325                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6326                                         }
6327                                         if (stcb->asoc.state == 0) {
6328                                                 /* the assoc was freed? */
6329                                                 return (-21);
6330                                         }
6331                                         return (-22);
6332                                 }
6333                         }
6334                 } else
6335 #endif
6336                 if (ptype == SCTP_ECN_CAPABLE) {
6337                         peer_supports_ecn = 1;
6338                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6339                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6340                                 struct sctp_adaptation_layer_indication ai,
6341                                                                 *aip;
6342
6343                                 phdr = sctp_get_next_param(m, offset,
6344                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6345                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6346                                 if (aip) {
6347                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6348                                         stcb->asoc.adaptation_needed = 1;
6349                                 }
6350                         }
6351                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6352                         struct sctp_asconf_addr_param lstore, *fee;
6353                         int lptype;
6354                         struct sockaddr *lsa = NULL;
6355 #ifdef INET
6356                         struct sctp_asconf_addrv4_param *fii;
6357 #endif
6358
6359                         if (stcb->asoc.asconf_supported == 0) {
6360                                 return (-100);
6361                         }
6362                         if (plen > sizeof(lstore)) {
6363                                 return (-23);
6364                         }
6365                         if (plen < sizeof(struct sctp_asconf_addrv4_param)) {
6366                                 return (-101);
6367                         }
6368                         phdr = sctp_get_next_param(m, offset,
6369                             (struct sctp_paramhdr *)&lstore,
6370                             plen);
6371                         if (phdr == NULL) {
6372                                 return (-24);
6373                         }
6374                         fee = (struct sctp_asconf_addr_param *)phdr;
6375                         lptype = ntohs(fee->addrp.ph.param_type);
6376                         switch (lptype) {
6377 #ifdef INET
6378                         case SCTP_IPV4_ADDRESS:
6379                                 if (plen !=
6380                                     sizeof(struct sctp_asconf_addrv4_param)) {
6381                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6382                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6383                                             plen);
6384                                 } else {
6385                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6386                                         sin.sin_addr.s_addr = fii->addrp.addr;
6387                                         lsa = (struct sockaddr *)&sin;
6388                                 }
6389                                 break;
6390 #endif
6391 #ifdef INET6
6392                         case SCTP_IPV6_ADDRESS:
6393                                 if (plen !=
6394                                     sizeof(struct sctp_asconf_addr_param)) {
6395                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6396                                             (int)sizeof(struct sctp_asconf_addr_param),
6397                                             plen);
6398                                 } else {
6399                                         memcpy(sin6.sin6_addr.s6_addr,
6400                                             fee->addrp.addr,
6401                                             sizeof(fee->addrp.addr));
6402                                         lsa = (struct sockaddr *)&sin6;
6403                                 }
6404                                 break;
6405 #endif
6406                         default:
6407                                 break;
6408                         }
6409                         if (lsa) {
6410                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6411                         }
6412                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6413                         stcb->asoc.peer_supports_nat = 1;
6414                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6415                         /* Peer supports pr-sctp */
6416                         peer_supports_prsctp = 1;
6417                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6418                         /* A supported extension chunk */
6419                         struct sctp_supported_chunk_types_param *pr_supported;
6420                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6421                         int num_ent, i;
6422
6423                         if (plen > sizeof(local_store)) {
6424                                 return (-35);
6425                         }
6426                         phdr = sctp_get_next_param(m, offset,
6427                             (struct sctp_paramhdr *)&local_store, plen);
6428                         if (phdr == NULL) {
6429                                 return (-25);
6430                         }
6431                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6432                         num_ent = plen - sizeof(struct sctp_paramhdr);
6433                         for (i = 0; i < num_ent; i++) {
6434                                 switch (pr_supported->chunk_types[i]) {
6435                                 case SCTP_ASCONF:
6436                                         peer_supports_asconf = 1;
6437                                         break;
6438                                 case SCTP_ASCONF_ACK:
6439                                         peer_supports_asconf_ack = 1;
6440                                         break;
6441                                 case SCTP_FORWARD_CUM_TSN:
6442                                         peer_supports_prsctp = 1;
6443                                         break;
6444                                 case SCTP_PACKET_DROPPED:
6445                                         peer_supports_pktdrop = 1;
6446                                         break;
6447                                 case SCTP_NR_SELECTIVE_ACK:
6448                                         peer_supports_nrsack = 1;
6449                                         break;
6450                                 case SCTP_STREAM_RESET:
6451                                         peer_supports_reconfig = 1;
6452                                         break;
6453                                 case SCTP_AUTHENTICATION:
6454                                         peer_supports_auth = 1;
6455                                         break;
6456                                 case SCTP_IDATA:
6457                                         peer_supports_idata = 1;
6458                                         break;
6459                                 default:
6460                                         /* one I have not learned yet */
6461                                         break;
6462                                 }
6463                         }
6464                 } else if (ptype == SCTP_RANDOM) {
6465                         if (plen > sizeof(random_store))
6466                                 break;
6467                         if (got_random) {
6468                                 /* already processed a RANDOM */
6469                                 goto next_param;
6470                         }
6471                         phdr = sctp_get_next_param(m, offset,
6472                             (struct sctp_paramhdr *)random_store,
6473                             plen);
6474                         if (phdr == NULL)
6475                                 return (-26);
6476                         p_random = (struct sctp_auth_random *)phdr;
6477                         random_len = plen - sizeof(*p_random);
6478                         /* enforce the random length */
6479                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6480                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6481                                 return (-27);
6482                         }
6483                         got_random = 1;
6484                 } else if (ptype == SCTP_HMAC_LIST) {
6485                         uint16_t num_hmacs;
6486                         uint16_t i;
6487
6488                         if (plen > sizeof(hmacs_store))
6489                                 break;
6490                         if (got_hmacs) {
6491                                 /* already processed a HMAC list */
6492                                 goto next_param;
6493                         }
6494                         phdr = sctp_get_next_param(m, offset,
6495                             (struct sctp_paramhdr *)hmacs_store,
6496                             plen);
6497                         if (phdr == NULL)
6498                                 return (-28);
6499                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6500                         hmacs_len = plen - sizeof(*hmacs);
6501                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6502                         /* validate the hmac list */
6503                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6504                                 return (-29);
6505                         }
6506                         if (stcb->asoc.peer_hmacs != NULL)
6507                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6508                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6509                         if (stcb->asoc.peer_hmacs != NULL) {
6510                                 for (i = 0; i < num_hmacs; i++) {
6511                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6512                                             ntohs(hmacs->hmac_ids[i]));
6513                                 }
6514                         }
6515                         got_hmacs = 1;
6516                 } else if (ptype == SCTP_CHUNK_LIST) {
6517                         int i;
6518
6519                         if (plen > sizeof(chunks_store))
6520                                 break;
6521                         if (got_chklist) {
6522                                 /* already processed a Chunks list */
6523                                 goto next_param;
6524                         }
6525                         phdr = sctp_get_next_param(m, offset,
6526                             (struct sctp_paramhdr *)chunks_store,
6527                             plen);
6528                         if (phdr == NULL)
6529                                 return (-30);
6530                         chunks = (struct sctp_auth_chunk_list *)phdr;
6531                         num_chunks = plen - sizeof(*chunks);
6532                         if (stcb->asoc.peer_auth_chunks != NULL)
6533                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6534                         else
6535                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6536                         for (i = 0; i < num_chunks; i++) {
6537                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6538                                     stcb->asoc.peer_auth_chunks);
6539                                 /* record asconf/asconf-ack if listed */
6540                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6541                                         saw_asconf = 1;
6542                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6543                                         saw_asconf_ack = 1;
6544                         }
6545                         got_chklist = 1;
6546                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6547                             (ptype == SCTP_STATE_COOKIE) ||
6548                             (ptype == SCTP_UNRECOG_PARAM) ||
6549                             (ptype == SCTP_COOKIE_PRESERVE) ||
6550                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6551                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6552                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6553                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6554                     (ptype == SCTP_SUCCESS_REPORT)) {
6555                         /* don't care */
6556                 } else {
6557                         if ((ptype & 0x8000) == 0x0000) {
6558                                 /*
6559                                  * must stop processing the rest of the
6560                                  * param's. Any report bits were handled
6561                                  * with the call to
6562                                  * sctp_arethere_unrecognized_parameters()
6563                                  * when the INIT or INIT-ACK was first seen.
6564                                  */
6565                                 break;
6566                         }
6567                 }
6568
6569 next_param:
6570                 offset += SCTP_SIZE32(plen);
6571                 if (offset >= limit) {
6572                         break;
6573                 }
6574                 phdr = sctp_get_next_param(m, offset, &param_buf,
6575                     sizeof(param_buf));
6576         }
6577         /* Now check to see if we need to purge any addresses */
6578         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6579                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6580                     SCTP_ADDR_NOT_IN_ASSOC) {
6581                         /* This address has been removed from the asoc */
6582                         /* remove and free it */
6583                         stcb->asoc.numnets--;
6584                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6585                         if (net == stcb->asoc.alternate) {
6586                                 sctp_free_remote_addr(stcb->asoc.alternate);
6587                                 stcb->asoc.alternate = NULL;
6588                         }
6589                         if (net == stcb->asoc.primary_destination) {
6590                                 stcb->asoc.primary_destination = NULL;
6591                                 sctp_select_primary_destination(stcb);
6592                         }
6593                         sctp_free_remote_addr(net);
6594                 }
6595         }
6596         if ((stcb->asoc.ecn_supported == 1) &&
6597             (peer_supports_ecn == 0)) {
6598                 stcb->asoc.ecn_supported = 0;
6599         }
6600         if ((stcb->asoc.prsctp_supported == 1) &&
6601             (peer_supports_prsctp == 0)) {
6602                 stcb->asoc.prsctp_supported = 0;
6603         }
6604         if ((stcb->asoc.auth_supported == 1) &&
6605             ((peer_supports_auth == 0) ||
6606             (got_random == 0) || (got_hmacs == 0))) {
6607                 stcb->asoc.auth_supported = 0;
6608         }
6609         if ((stcb->asoc.asconf_supported == 1) &&
6610             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6611             (stcb->asoc.auth_supported == 0) ||
6612             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6613                 stcb->asoc.asconf_supported = 0;
6614         }
6615         if ((stcb->asoc.reconfig_supported == 1) &&
6616             (peer_supports_reconfig == 0)) {
6617                 stcb->asoc.reconfig_supported = 0;
6618         }
6619         if ((stcb->asoc.idata_supported == 1) &&
6620             (peer_supports_idata == 0)) {
6621                 stcb->asoc.idata_supported = 0;
6622         }
6623         if ((stcb->asoc.nrsack_supported == 1) &&
6624             (peer_supports_nrsack == 0)) {
6625                 stcb->asoc.nrsack_supported = 0;
6626         }
6627         if ((stcb->asoc.pktdrop_supported == 1) &&
6628             (peer_supports_pktdrop == 0)) {
6629                 stcb->asoc.pktdrop_supported = 0;
6630         }
6631         /* validate authentication required parameters */
6632         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6633                 /* peer does not support auth but sent a chunks list? */
6634                 return (-31);
6635         }
6636         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6637                 /* peer supports asconf but not auth? */
6638                 return (-32);
6639         } else if ((peer_supports_asconf == 1) &&
6640                     (peer_supports_auth == 1) &&
6641             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6642                 return (-33);
6643         }
6644         /* concatenate the full random key */
6645         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6646         if (chunks != NULL) {
6647                 keylen += sizeof(*chunks) + num_chunks;
6648         }
6649         new_key = sctp_alloc_key(keylen);
6650         if (new_key != NULL) {
6651                 /* copy in the RANDOM */
6652                 if (p_random != NULL) {
6653                         keylen = sizeof(*p_random) + random_len;
6654                         memcpy(new_key->key, p_random, keylen);
6655                 } else {
6656                         keylen = 0;
6657                 }
6658                 /* append in the AUTH chunks */
6659                 if (chunks != NULL) {
6660                         memcpy(new_key->key + keylen, chunks,
6661                             sizeof(*chunks) + num_chunks);
6662                         keylen += sizeof(*chunks) + num_chunks;
6663                 }
6664                 /* append in the HMACs */
6665                 if (hmacs != NULL) {
6666                         memcpy(new_key->key + keylen, hmacs,
6667                             sizeof(*hmacs) + hmacs_len);
6668                 }
6669         } else {
6670                 /* failed to get memory for the key */
6671                 return (-34);
6672         }
6673         if (stcb->asoc.authinfo.peer_random != NULL)
6674                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6675         stcb->asoc.authinfo.peer_random = new_key;
6676         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6677         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6678
6679         return (0);
6680 }
6681
6682 int
6683 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6684     struct sctp_nets *net)
6685 {
6686         /* make sure the requested primary address exists in the assoc */
6687         if (net == NULL && sa)
6688                 net = sctp_findnet(stcb, sa);
6689
6690         if (net == NULL) {
6691                 /* didn't find the requested primary address! */
6692                 return (-1);
6693         } else {
6694                 /* set the primary address */
6695                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6696                         /* Must be confirmed, so queue to set */
6697                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6698                         return (0);
6699                 }
6700                 stcb->asoc.primary_destination = net;
6701                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6702                         sctp_free_remote_addr(stcb->asoc.alternate);
6703                         stcb->asoc.alternate = NULL;
6704                 }
6705                 net = TAILQ_FIRST(&stcb->asoc.nets);
6706                 if (net != stcb->asoc.primary_destination) {
6707                         /*
6708                          * first one on the list is NOT the primary
6709                          * sctp_cmpaddr() is much more efficient if the
6710                          * primary is the first on the list, make it so.
6711                          */
6712                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6713                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6714                 }
6715                 return (0);
6716         }
6717 }
6718
6719 int
6720 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6721 {
6722         /*
6723          * This function serves two purposes. It will see if a TAG can be
6724          * re-used and return 1 for yes it is ok and 0 for don't use that
6725          * tag. A secondary function it will do is purge out old tags that
6726          * can be removed.
6727          */
6728         struct sctpvtaghead *chain;
6729         struct sctp_tagblock *twait_block;
6730         struct sctpasochead *head;
6731         struct sctp_tcb *stcb;
6732         int i;
6733
6734         SCTP_INP_INFO_RLOCK();
6735         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6736             SCTP_BASE_INFO(hashasocmark))];
6737         LIST_FOREACH(stcb, head, sctp_asocs) {
6738                 /*
6739                  * We choose not to lock anything here. TCB's can't be
6740                  * removed since we have the read lock, so they can't be
6741                  * freed on us, same thing for the INP. I may be wrong with
6742                  * this assumption, but we will go with it for now :-)
6743                  */
6744                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6745                         continue;
6746                 }
6747                 if (stcb->asoc.my_vtag == tag) {
6748                         /* candidate */
6749                         if (stcb->rport != rport) {
6750                                 continue;
6751                         }
6752                         if (stcb->sctp_ep->sctp_lport != lport) {
6753                                 continue;
6754                         }
6755                         /* Its a used tag set */
6756                         SCTP_INP_INFO_RUNLOCK();
6757                         return (0);
6758                 }
6759         }
6760         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6761         /* Now what about timed wait ? */
6762         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6763                 /*
6764                  * Block(s) are present, lets see if we have this tag in the
6765                  * list
6766                  */
6767                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6768                         if (twait_block->vtag_block[i].v_tag == 0) {
6769                                 /* not used */
6770                                 continue;
6771                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6772                             now->tv_sec) {
6773                                 /* Audit expires this guy */
6774                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6775                                 twait_block->vtag_block[i].v_tag = 0;
6776                                 twait_block->vtag_block[i].lport = 0;
6777                                 twait_block->vtag_block[i].rport = 0;
6778                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6779                                     (twait_block->vtag_block[i].lport == lport) &&
6780                             (twait_block->vtag_block[i].rport == rport)) {
6781                                 /* Bad tag, sorry :< */
6782                                 SCTP_INP_INFO_RUNLOCK();
6783                                 return (0);
6784                         }
6785                 }
6786         }
6787         SCTP_INP_INFO_RUNLOCK();
6788         return (1);
6789 }
6790
6791 static void
6792 sctp_drain_mbufs(struct sctp_tcb *stcb)
6793 {
6794         /*
6795          * We must hunt this association for MBUF's past the cumack (i.e.
6796          * out of order data that we can renege on).
6797          */
6798         struct sctp_association *asoc;
6799         struct sctp_tmit_chunk *chk, *nchk;
6800         uint32_t cumulative_tsn_p1;
6801         struct sctp_queued_to_read *control, *ncontrol;
6802         int cnt, strmat;
6803         uint32_t gap, i;
6804         int fnd = 0;
6805
6806         /* We look for anything larger than the cum-ack + 1 */
6807
6808         asoc = &stcb->asoc;
6809         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6810                 /* none we can reneg on. */
6811                 return;
6812         }
6813         SCTP_STAT_INCR(sctps_protocol_drains_done);
6814         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6815         cnt = 0;
6816         /* Ok that was fun, now we will drain all the inbound streams? */
6817         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6818                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) {
6819 #ifdef INVARIANTS
6820                         if (control->on_strm_q != SCTP_ON_ORDERED) {
6821                                 panic("Huh control: %p on_q: %d -- not ordered?",
6822                                     control, control->on_strm_q);
6823                         }
6824 #endif
6825                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6826                                 /* Yep it is above cum-ack */
6827                                 cnt++;
6828                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6829                                 KASSERT(control->length > 0, ("control has zero length"));
6830                                 if (asoc->size_on_all_streams >= control->length) {
6831                                         asoc->size_on_all_streams -= control->length;
6832                                 } else {
6833 #ifdef INVARIANTS
6834                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6835 #else
6836                                         asoc->size_on_all_streams = 0;
6837 #endif
6838                                 }
6839                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6840                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6841                                 if (control->on_read_q) {
6842                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6843                                         control->on_read_q = 0;
6844                                 }
6845                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm);
6846                                 control->on_strm_q = 0;
6847                                 if (control->data) {
6848                                         sctp_m_freem(control->data);
6849                                         control->data = NULL;
6850                                 }
6851                                 sctp_free_remote_addr(control->whoFrom);
6852                                 /* Now its reasm? */
6853                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6854                                         cnt++;
6855                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6856                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6857                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6858                                                 asoc->size_on_reasm_queue -= chk->send_size;
6859                                         } else {
6860 #ifdef INVARIANTS
6861                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6862 #else
6863                                                 asoc->size_on_reasm_queue = 0;
6864 #endif
6865                                         }
6866                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6867                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6868                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6869                                         if (chk->data) {
6870                                                 sctp_m_freem(chk->data);
6871                                                 chk->data = NULL;
6872                                         }
6873                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6874                                 }
6875                                 sctp_free_a_readq(stcb, control);
6876                         }
6877                 }
6878                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) {
6879 #ifdef INVARIANTS
6880                         if (control->on_strm_q != SCTP_ON_UNORDERED) {
6881                                 panic("Huh control: %p on_q: %d -- not unordered?",
6882                                     control, control->on_strm_q);
6883                         }
6884 #endif
6885                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6886                                 /* Yep it is above cum-ack */
6887                                 cnt++;
6888                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6889                                 KASSERT(control->length > 0, ("control has zero length"));
6890                                 if (asoc->size_on_all_streams >= control->length) {
6891                                         asoc->size_on_all_streams -= control->length;
6892                                 } else {
6893 #ifdef INVARIANTS
6894                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6895 #else
6896                                         asoc->size_on_all_streams = 0;
6897 #endif
6898                                 }
6899                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6900                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6901                                 if (control->on_read_q) {
6902                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6903                                         control->on_read_q = 0;
6904                                 }
6905                                 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm);
6906                                 control->on_strm_q = 0;
6907                                 if (control->data) {
6908                                         sctp_m_freem(control->data);
6909                                         control->data = NULL;
6910                                 }
6911                                 sctp_free_remote_addr(control->whoFrom);
6912                                 /* Now its reasm? */
6913                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6914                                         cnt++;
6915                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6916                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6917                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6918                                                 asoc->size_on_reasm_queue -= chk->send_size;
6919                                         } else {
6920 #ifdef INVARIANTS
6921                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6922 #else
6923                                                 asoc->size_on_reasm_queue = 0;
6924 #endif
6925                                         }
6926                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6927                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6928                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6929                                         if (chk->data) {
6930                                                 sctp_m_freem(chk->data);
6931                                                 chk->data = NULL;
6932                                         }
6933                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6934                                 }
6935                                 sctp_free_a_readq(stcb, control);
6936                         }
6937                 }
6938         }
6939         if (cnt) {
6940                 /* We must back down to see what the new highest is */
6941                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6942                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6943                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6944                                 asoc->highest_tsn_inside_map = i;
6945                                 fnd = 1;
6946                                 break;
6947                         }
6948                 }
6949                 if (!fnd) {
6950                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6951                 }
6952
6953                 /*
6954                  * Question, should we go through the delivery queue? The
6955                  * only reason things are on here is the app not reading OR
6956                  * a p-d-api up. An attacker COULD send enough in to
6957                  * initiate the PD-API and then send a bunch of stuff to
6958                  * other streams... these would wind up on the delivery
6959                  * queue.. and then we would not get to them. But in order
6960                  * to do this I then have to back-track and un-deliver
6961                  * sequence numbers in streams.. el-yucko. I think for now
6962                  * we will NOT look at the delivery queue and leave it to be
6963                  * something to consider later. An alternative would be to
6964                  * abort the P-D-API with a notification and then deliver
6965                  * the data.... Or another method might be to keep track of
6966                  * how many times the situation occurs and if we see a
6967                  * possible attack underway just abort the association.
6968                  */
6969 #ifdef SCTP_DEBUG
6970                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6971 #endif
6972                 /*
6973                  * Now do we need to find a new
6974                  * asoc->highest_tsn_inside_map?
6975                  */
6976                 asoc->last_revoke_count = cnt;
6977                 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
6978                     SCTP_FROM_SCTP_PCB + SCTP_LOC_11);
6979                 /* sa_ignore NO_NULL_CHK */
6980                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6981                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6982         }
6983         /*
6984          * Another issue, in un-setting the TSN's in the mapping array we
6985          * DID NOT adjust the highest_tsn marker.  This will cause one of
6986          * two things to occur. It may cause us to do extra work in checking
6987          * for our mapping array movement. More importantly it may cause us
6988          * to SACK every datagram. This may not be a bad thing though since
6989          * we will recover once we get our cum-ack above and all this stuff
6990          * we dumped recovered.
6991          */
6992 }
6993
6994 void
6995 sctp_drain()
6996 {
6997         /*
6998          * We must walk the PCB lists for ALL associations here. The system
6999          * is LOW on MBUF's and needs help. This is where reneging will
7000          * occur. We really hope this does NOT happen!
7001          */
7002         VNET_ITERATOR_DECL(vnet_iter);
7003         VNET_LIST_RLOCK_NOSLEEP();
7004         VNET_FOREACH(vnet_iter) {
7005                 CURVNET_SET(vnet_iter);
7006                 struct sctp_inpcb *inp;
7007                 struct sctp_tcb *stcb;
7008
7009                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
7010                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7011 #ifdef VIMAGE
7012                         continue;
7013 #else
7014                         return;
7015 #endif
7016                 }
7017                 SCTP_INP_INFO_RLOCK();
7018                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7019                         /* For each endpoint */
7020                         SCTP_INP_RLOCK(inp);
7021                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7022                                 /* For each association */
7023                                 SCTP_TCB_LOCK(stcb);
7024                                 sctp_drain_mbufs(stcb);
7025                                 SCTP_TCB_UNLOCK(stcb);
7026                         }
7027                         SCTP_INP_RUNLOCK(inp);
7028                 }
7029                 SCTP_INP_INFO_RUNLOCK();
7030                 CURVNET_RESTORE();
7031         }
7032         VNET_LIST_RUNLOCK_NOSLEEP();
7033 }
7034
7035 /*
7036  * start a new iterator
7037  * iterates through all endpoints and associations based on the pcb_state
7038  * flags and asoc_state.  "af" (mandatory) is executed for all matching
7039  * assocs and "ef" (optional) is executed when the iterator completes.
7040  * "inpf" (optional) is executed for each new endpoint as it is being
7041  * iterated through. inpe (optional) is called when the inp completes
7042  * its way through all the stcbs.
7043  */
7044 int
7045 sctp_initiate_iterator(inp_func inpf,
7046     asoc_func af,
7047     inp_func inpe,
7048     uint32_t pcb_state,
7049     uint32_t pcb_features,
7050     uint32_t asoc_state,
7051     void *argp,
7052     uint32_t argi,
7053     end_func ef,
7054     struct sctp_inpcb *s_inp,
7055     uint8_t chunk_output_off)
7056 {
7057         struct sctp_iterator *it = NULL;
7058
7059         if (af == NULL) {
7060                 return (-1);
7061         }
7062         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7063                 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7064                     SCTP_BASE_VAR(sctp_pcb_initialized));
7065                 return (-1);
7066         }
7067         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7068             SCTP_M_ITER);
7069         if (it == NULL) {
7070                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7071                 return (-1);
7072         }
7073         memset(it, 0, sizeof(*it));
7074         it->function_assoc = af;
7075         it->function_inp = inpf;
7076         if (inpf)
7077                 it->done_current_ep = 0;
7078         else
7079                 it->done_current_ep = 1;
7080         it->function_atend = ef;
7081         it->pointer = argp;
7082         it->val = argi;
7083         it->pcb_flags = pcb_state;
7084         it->pcb_features = pcb_features;
7085         it->asoc_state = asoc_state;
7086         it->function_inp_end = inpe;
7087         it->no_chunk_output = chunk_output_off;
7088         it->vn = curvnet;
7089         if (s_inp) {
7090                 /* Assume lock is held here */
7091                 it->inp = s_inp;
7092                 SCTP_INP_INCR_REF(it->inp);
7093                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7094         } else {
7095                 SCTP_INP_INFO_RLOCK();
7096                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7097                 if (it->inp) {
7098                         SCTP_INP_INCR_REF(it->inp);
7099                 }
7100                 SCTP_INP_INFO_RUNLOCK();
7101                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7102         }
7103         SCTP_IPI_ITERATOR_WQ_LOCK();
7104         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7105                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7106                 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7107                     SCTP_BASE_VAR(sctp_pcb_initialized), it);
7108                 SCTP_FREE(it, SCTP_M_ITER);
7109                 return (-1);
7110         }
7111         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7112         if (sctp_it_ctl.iterator_running == 0) {
7113                 sctp_wakeup_iterator();
7114         }
7115         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7116         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7117         return (0);
7118 }