sys/netinet/sctp_pcb.c

   1 /*-
   2  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
   3  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
   4  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * a) Redistributions of source code must retain the above copyright notice,
  10  *    this list of conditions and the following disclaimer.
  11  *
  12  * b) Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the distribution.
  15  *
  16  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  30  * THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35
  36 #include <netinet/sctp_os.h>
  37 #include <sys/proc.h>
  38 #include <netinet/sctp_var.h>
  39 #include <netinet/sctp_sysctl.h>
  40 #include <netinet/sctp_pcb.h>
  41 #include <netinet/sctputil.h>
  42 #include <netinet/sctp.h>
  43 #include <netinet/sctp_header.h>
  44 #include <netinet/sctp_asconf.h>
  45 #include <netinet/sctp_output.h>
  46 #include <netinet/sctp_timer.h>
  47 #include <netinet/sctp_bsd_addr.h>
  48 #include <netinet/sctp_dtrace_define.h>
  49 #include <netinet/udp.h>
  50 #ifdef INET6
  51 #include <netinet6/ip6_var.h>
  52 #endif
  53 #include <sys/sched.h>
  54 #include <sys/smp.h>
  55 #include <sys/unistd.h>
  56
  57
  58 VNET_DEFINE(struct sctp_base_info, system_base_info);
  59
  60 /* FIX: we don't handle multiple link local scopes */
  61 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  62 #ifdef INET6
  63 int
  64 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  65 {
  66         struct sockaddr_in6 tmp_a, tmp_b;
  67
  68         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  69         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  70                 return (0);
  71         }
  72         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  73         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  74                 return (0);
  75         }
  76         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  77 }
  78
  79 #endif
  80
  81 void
  82 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  83 {
  84         /*
  85          * We really don't need to lock this, but I will just because it
  86          * does not hurt.
  87          */
  88         SCTP_INP_INFO_RLOCK();
  89         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  90         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  91         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  92         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  93         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  94         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  95         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  96         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
  97         SCTP_INP_INFO_RUNLOCK();
  98 }
  99
 100 /*-
 101  * Addresses are added to VRF's (Virtual Router's). For BSD we
 102  * have only the default VRF 0. We maintain a hash list of
 103  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
 104  * these has a list of addresses. When we add a new address
 105  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 106  * not exist we create it and add it to the list of IFN's
 107  * within the VRF. Once we have the sctp_ifn, we add the
 108  * address to the list. So we look something like:
 109  *
 110  * hash-vrf-table
 111  *   vrf-> ifn-> ifn -> ifn
 112  *   vrf    |
 113  *    ...   +--ifa-> ifa -> ifa
 114  *   vrf
 115  *
 116  * We keep these separate lists since the SCTP subsystem will
 117  * point to these from its source address selection nets structure.
 118  * When an address is deleted it does not happen right away on
 119  * the SCTP side, it gets scheduled. What we do when a
 120  * delete happens is immediately remove the address from
 121  * the master list and decrement the refcount. As our
 122  * addip iterator works through and frees the src address
 123  * selection pointing to the sctp_ifa, eventually the refcount
 124  * will reach 0 and we will delete it. Note that it is assumed
 125  * that any locking on system level ifn/ifa is done at the
 126  * caller of these functions and these routines will only
 127  * lock the SCTP structures as they add or delete things.
 128  *
 129  * Other notes on VRF concepts.
 130  *  - An endpoint can be in multiple VRF's
 131  *  - An association lives within a VRF and only one VRF.
 132  *  - Any incoming packet we can deduce the VRF for by
 133  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 134  *  - Any downward send call or connect call must supply the
 135  *    VRF via ancillary data or via some sort of set default
 136  *    VRF socket option call (again for BSD no brainer since
 137  *    the VRF is always 0).
 138  *  - An endpoint may add multiple VRF's to it.
 139  *  - Listening sockets can accept associations in any
 140  *    of the VRF's they are in but the assoc will end up
 141  *    in only one VRF (gotten from the packet or connect/send).
 142  *
 143  */
 144
 145 struct sctp_vrf *
 146 sctp_allocate_vrf(int vrf_id)
 147 {
 148         struct sctp_vrf *vrf = NULL;
 149         struct sctp_vrflist *bucket;
 150
 151         /* First allocate the VRF structure */
 152         vrf = sctp_find_vrf(vrf_id);
 153         if (vrf) {
 154                 /* Already allocated */
 155                 return (vrf);
 156         }
 157         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 158             SCTP_M_VRF);
 159         if (vrf == NULL) {
 160                 /* No memory */
 161 #ifdef INVARIANTS
 162                 panic("No memory for VRF:%d", vrf_id);
 163 #endif
 164                 return (NULL);
 165         }
 166         /* setup the VRF */
 167         memset(vrf, 0, sizeof(struct sctp_vrf));
 168         vrf->vrf_id = vrf_id;
 169         LIST_INIT(&vrf->ifnlist);
 170         vrf->total_ifa_count = 0;
 171         vrf->refcount = 0;
 172         /* now also setup table ids */
 173         SCTP_INIT_VRF_TABLEID(vrf);
 174         /* Init the HASH of addresses */
 175         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 176             &vrf->vrf_addr_hashmark);
 177         if (vrf->vrf_addr_hash == NULL) {
 178                 /* No memory */
 179 #ifdef INVARIANTS
 180                 panic("No memory for VRF:%d", vrf_id);
 181 #endif
 182                 SCTP_FREE(vrf, SCTP_M_VRF);
 183                 return (NULL);
 184         }
 185         /* Add it to the hash table */
 186         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 187         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 188         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 189         return (vrf);
 190 }
 191
 192
 193 struct sctp_ifn *
 194 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 195 {
 196         struct sctp_ifn *sctp_ifnp;
 197         struct sctp_ifnlist *hash_ifn_head;
 198
 199         /*
 200          * We assume the lock is held for the addresses if that's wrong
 201          * problems could occur :-)
 202          */
 203         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 204         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 205                 if (sctp_ifnp->ifn_index == ifn_index) {
 206                         return (sctp_ifnp);
 207                 }
 208                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 209                         return (sctp_ifnp);
 210                 }
 211         }
 212         return (NULL);
 213 }
 214
 215
 216 struct sctp_vrf *
 217 sctp_find_vrf(uint32_t vrf_id)
 218 {
 219         struct sctp_vrflist *bucket;
 220         struct sctp_vrf *liste;
 221
 222         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 223         LIST_FOREACH(liste, bucket, next_vrf) {
 224                 if (vrf_id == liste->vrf_id) {
 225                         return (liste);
 226                 }
 227         }
 228         return (NULL);
 229 }
 230
 231
 232 void
 233 sctp_free_vrf(struct sctp_vrf *vrf)
 234 {
 235         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 236                 if (vrf->vrf_addr_hash) {
 237                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 238                         vrf->vrf_addr_hash = NULL;
 239                 }
 240                 /* We zero'd the count */
 241                 LIST_REMOVE(vrf, next_vrf);
 242                 SCTP_FREE(vrf, SCTP_M_VRF);
 243                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 244         }
 245 }
 246
 247
 248 void
 249 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 250 {
 251         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 252                 /* We zero'd the count */
 253                 if (sctp_ifnp->vrf) {
 254                         sctp_free_vrf(sctp_ifnp->vrf);
 255                 }
 256                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 257                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 258         }
 259 }
 260
 261
 262 void
 263 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 264 {
 265         struct sctp_ifn *sctp_ifnp;
 266
 267         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 268         if (sctp_ifnp != NULL) {
 269                 sctp_ifnp->ifn_mtu = mtu;
 270         }
 271 }
 272
 273
 274 void
 275 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 276 {
 277         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 278                 /* We zero'd the count */
 279                 if (sctp_ifap->ifn_p) {
 280                         sctp_free_ifn(sctp_ifap->ifn_p);
 281                 }
 282                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 283                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 284         }
 285 }
 286
 287
 288 static void
 289 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 290 {
 291         struct sctp_ifn *found;
 292
 293         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 294         if (found == NULL) {
 295                 /* Not in the list.. sorry */
 296                 return;
 297         }
 298         if (hold_addr_lock == 0)
 299                 SCTP_IPI_ADDR_WLOCK();
 300         LIST_REMOVE(sctp_ifnp, next_bucket);
 301         LIST_REMOVE(sctp_ifnp, next_ifn);
 302         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 303             sctp_ifnp->registered_af);
 304         if (hold_addr_lock == 0)
 305                 SCTP_IPI_ADDR_WUNLOCK();
 306         /* Take away the reference, and possibly free it */
 307         sctp_free_ifn(sctp_ifnp);
 308 }
 309
 310
 311 void
 312 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 313     const char *if_name, uint32_t ifn_index)
 314 {
 315         struct sctp_vrf *vrf;
 316         struct sctp_ifa *sctp_ifap;
 317
 318         SCTP_IPI_ADDR_RLOCK();
 319         vrf = sctp_find_vrf(vrf_id);
 320         if (vrf == NULL) {
 321                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 322                 goto out;
 323
 324         }
 325         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 326         if (sctp_ifap == NULL) {
 327                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 328                 goto out;
 329         }
 330         if (sctp_ifap->ifn_p == NULL) {
 331                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 332                 goto out;
 333         }
 334         if (if_name) {
 335                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 336                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 337                             sctp_ifap->ifn_p->ifn_name, if_name);
 338                         goto out;
 339                 }
 340         } else {
 341                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 342                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 343                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 344                         goto out;
 345                 }
 346         }
 347
 348         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 349         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 350 out:
 351         SCTP_IPI_ADDR_RUNLOCK();
 352 }
 353
 354
 355 void
 356 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 357     const char *if_name, uint32_t ifn_index)
 358 {
 359         struct sctp_vrf *vrf;
 360         struct sctp_ifa *sctp_ifap;
 361
 362         SCTP_IPI_ADDR_RLOCK();
 363         vrf = sctp_find_vrf(vrf_id);
 364         if (vrf == NULL) {
 365                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 366                 goto out;
 367
 368         }
 369         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 370         if (sctp_ifap == NULL) {
 371                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 372                 goto out;
 373         }
 374         if (sctp_ifap->ifn_p == NULL) {
 375                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 376                 goto out;
 377         }
 378         if (if_name) {
 379                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 380                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 381                             sctp_ifap->ifn_p->ifn_name, if_name);
 382                         goto out;
 383                 }
 384         } else {
 385                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 386                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 387                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 388                         goto out;
 389                 }
 390         }
 391
 392         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 393         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 394 out:
 395         SCTP_IPI_ADDR_RUNLOCK();
 396 }
 397
 398
 399 /*-
 400  * Add an ifa to an ifn.
 401  * Register the interface as necessary.
 402  * NOTE: ADDR write lock MUST be held.
 403  */
 404 static void
 405 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 406 {
 407         int ifa_af;
 408
 409         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 410         sctp_ifap->ifn_p = sctp_ifnp;
 411         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 412         /* update address counts */
 413         sctp_ifnp->ifa_count++;
 414         ifa_af = sctp_ifap->address.sa.sa_family;
 415         switch (ifa_af) {
 416 #ifdef INET
 417         case AF_INET:
 418                 sctp_ifnp->num_v4++;
 419                 break;
 420 #endif
 421 #ifdef INET6
 422         case AF_INET6:
 423                 sctp_ifnp->num_v6++;
 424                 break;
 425 #endif
 426         default:
 427                 break;
 428         }
 429         if (sctp_ifnp->ifa_count == 1) {
 430                 /* register the new interface */
 431                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 432                 sctp_ifnp->registered_af = ifa_af;
 433         }
 434 }
 435
 436
 437 /*-
 438  * Remove an ifa from its ifn.
 439  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 440  * the interface based on the remaining address families left.
 441  * NOTE: ADDR write lock MUST be held.
 442  */
 443 static void
 444 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 445 {
 446         LIST_REMOVE(sctp_ifap, next_ifa);
 447         if (sctp_ifap->ifn_p) {
 448                 /* update address counts */
 449                 sctp_ifap->ifn_p->ifa_count--;
 450                 switch (sctp_ifap->address.sa.sa_family) {
 451 #ifdef INET
 452                 case AF_INET:
 453                         sctp_ifap->ifn_p->num_v4--;
 454                         break;
 455 #endif
 456 #ifdef INET6
 457                 case AF_INET6:
 458                         sctp_ifap->ifn_p->num_v6--;
 459                         break;
 460 #endif
 461                 default:
 462                         break;
 463                 }
 464
 465                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 466                         /* remove the ifn, possibly freeing it */
 467                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 468                 } else {
 469                         /* re-register address family type, if needed */
 470                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 471                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 472                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 473                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 474                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 475                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 476                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 477                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 478                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 479                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 480                         }
 481                         /* free the ifn refcount */
 482                         sctp_free_ifn(sctp_ifap->ifn_p);
 483                 }
 484                 sctp_ifap->ifn_p = NULL;
 485         }
 486 }
 487
 488
 489 struct sctp_ifa *
 490 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 491     uint32_t ifn_type, const char *if_name, void *ifa,
 492     struct sockaddr *addr, uint32_t ifa_flags,
 493     int dynamic_add)
 494 {
 495         struct sctp_vrf *vrf;
 496         struct sctp_ifn *sctp_ifnp = NULL;
 497         struct sctp_ifa *sctp_ifap = NULL;
 498         struct sctp_ifalist *hash_addr_head;
 499         struct sctp_ifnlist *hash_ifn_head;
 500         uint32_t hash_of_addr;
 501         int new_ifn_af = 0;
 502
 503 #ifdef SCTP_DEBUG
 504         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 505         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 506 #endif
 507         SCTP_IPI_ADDR_WLOCK();
 508         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 509         if (sctp_ifnp) {
 510                 vrf = sctp_ifnp->vrf;
 511         } else {
 512                 vrf = sctp_find_vrf(vrf_id);
 513                 if (vrf == NULL) {
 514                         vrf = sctp_allocate_vrf(vrf_id);
 515                         if (vrf == NULL) {
 516                                 SCTP_IPI_ADDR_WUNLOCK();
 517                                 return (NULL);
 518                         }
 519                 }
 520         }
 521         if (sctp_ifnp == NULL) {
 522                 /*
 523                  * build one and add it, can't hold lock until after malloc
 524                  * done though.
 525                  */
 526                 SCTP_IPI_ADDR_WUNLOCK();
 527                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 528                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 529                 if (sctp_ifnp == NULL) {
 530 #ifdef INVARIANTS
 531                         panic("No memory for IFN");
 532 #endif
 533                         return (NULL);
 534                 }
 535                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 536                 sctp_ifnp->ifn_index = ifn_index;
 537                 sctp_ifnp->ifn_p = ifn;
 538                 sctp_ifnp->ifn_type = ifn_type;
 539                 sctp_ifnp->refcount = 0;
 540                 sctp_ifnp->vrf = vrf;
 541                 atomic_add_int(&vrf->refcount, 1);
 542                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 543                 if (if_name != NULL) {
 544                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
 545                 } else {
 546                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
 547                 }
 548                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 549                 LIST_INIT(&sctp_ifnp->ifalist);
 550                 SCTP_IPI_ADDR_WLOCK();
 551                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 552                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 553                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 554                 new_ifn_af = 1;
 555         }
 556         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 557         if (sctp_ifap) {
 558                 /* Hmm, it already exists? */
 559                 if ((sctp_ifap->ifn_p) &&
 560                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 561                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 562                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 563                             (void *)sctp_ifap);
 564                         if (new_ifn_af) {
 565                                 /* Remove the created one that we don't want */
 566                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 567                         }
 568                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 569                                 /* easy to solve, just switch back to active */
 570                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 571                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 572                                 sctp_ifap->ifn_p = sctp_ifnp;
 573                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 574                         }
 575         exit_stage_left:
 576                         SCTP_IPI_ADDR_WUNLOCK();
 577                         return (sctp_ifap);
 578                 } else {
 579                         if (sctp_ifap->ifn_p) {
 580                                 /*
 581                                  * The last IFN gets the address, remove the
 582                                  * old one
 583                                  */
 584                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 585                                     (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 586                                     sctp_ifap->ifn_p->ifn_index, if_name,
 587                                     ifn_index);
 588                                 /* remove the address from the old ifn */
 589                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 590                                 /* move the address over to the new ifn */
 591                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 592                                 goto exit_stage_left;
 593                         } else {
 594                                 /* repair ifnp which was NULL ? */
 595                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 596                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 597                                     (void *)sctp_ifnp, (void *)sctp_ifap);
 598                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 599                         }
 600                         goto exit_stage_left;
 601                 }
 602         }
 603         SCTP_IPI_ADDR_WUNLOCK();
 604         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 605         if (sctp_ifap == NULL) {
 606 #ifdef INVARIANTS
 607                 panic("No memory for IFA");
 608 #endif
 609                 return (NULL);
 610         }
 611         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 612         sctp_ifap->ifn_p = sctp_ifnp;
 613         atomic_add_int(&sctp_ifnp->refcount, 1);
 614         sctp_ifap->vrf_id = vrf_id;
 615         sctp_ifap->ifa = ifa;
 616         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 617         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 618         sctp_ifap->flags = ifa_flags;
 619         /* Set scope */
 620         switch (sctp_ifap->address.sa.sa_family) {
 621 #ifdef INET
 622         case AF_INET:
 623                 {
 624                         struct sockaddr_in *sin;
 625
 626                         sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
 627                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 628                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 629                                 sctp_ifap->src_is_loop = 1;
 630                         }
 631                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 632                                 sctp_ifap->src_is_priv = 1;
 633                         }
 634                         sctp_ifnp->num_v4++;
 635                         if (new_ifn_af)
 636                                 new_ifn_af = AF_INET;
 637                         break;
 638                 }
 639 #endif
 640 #ifdef INET6
 641         case AF_INET6:
 642                 {
 643                         /* ok to use deprecated addresses? */
 644                         struct sockaddr_in6 *sin6;
 645
 646                         sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
 647                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 648                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 649                                 sctp_ifap->src_is_loop = 1;
 650                         }
 651                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 652                                 sctp_ifap->src_is_priv = 1;
 653                         }
 654                         sctp_ifnp->num_v6++;
 655                         if (new_ifn_af)
 656                                 new_ifn_af = AF_INET6;
 657                         break;
 658                 }
 659 #endif
 660         default:
 661                 new_ifn_af = 0;
 662                 break;
 663         }
 664         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 665
 666         if ((sctp_ifap->src_is_priv == 0) &&
 667             (sctp_ifap->src_is_loop == 0)) {
 668                 sctp_ifap->src_is_glob = 1;
 669         }
 670         SCTP_IPI_ADDR_WLOCK();
 671         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 672         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 673         sctp_ifap->refcount = 1;
 674         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 675         sctp_ifnp->ifa_count++;
 676         vrf->total_ifa_count++;
 677         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 678         if (new_ifn_af) {
 679                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 680                 sctp_ifnp->registered_af = new_ifn_af;
 681         }
 682         SCTP_IPI_ADDR_WUNLOCK();
 683         if (dynamic_add) {
 684                 /*
 685                  * Bump up the refcount so that when the timer completes it
 686                  * will drop back down.
 687                  */
 688                 struct sctp_laddr *wi;
 689
 690                 atomic_add_int(&sctp_ifap->refcount, 1);
 691                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 692                 if (wi == NULL) {
 693                         /*
 694                          * Gak, what can we do? We have lost an address
 695                          * change can you say HOSED?
 696                          */
 697                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 698                         /* Opps, must decrement the count */
 699                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 700                             if_name);
 701                         return (NULL);
 702                 }
 703                 SCTP_INCR_LADDR_COUNT();
 704                 bzero(wi, sizeof(*wi));
 705                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 706                 wi->ifa = sctp_ifap;
 707                 wi->action = SCTP_ADD_IP_ADDRESS;
 708
 709                 SCTP_WQ_ADDR_LOCK();
 710                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 711                 SCTP_WQ_ADDR_UNLOCK();
 712
 713                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 714                     (struct sctp_inpcb *)NULL,
 715                     (struct sctp_tcb *)NULL,
 716                     (struct sctp_nets *)NULL);
 717         } else {
 718                 /* it's ready for use */
 719                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 720         }
 721         return (sctp_ifap);
 722 }
 723
 724 void
 725 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 726     uint32_t ifn_index, const char *if_name)
 727 {
 728         struct sctp_vrf *vrf;
 729         struct sctp_ifa *sctp_ifap = NULL;
 730
 731         SCTP_IPI_ADDR_WLOCK();
 732         vrf = sctp_find_vrf(vrf_id);
 733         if (vrf == NULL) {
 734                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 735                 goto out_now;
 736         }
 737 #ifdef SCTP_DEBUG
 738         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 739         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 740 #endif
 741         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 742         if (sctp_ifap) {
 743                 /* Validate the delete */
 744                 if (sctp_ifap->ifn_p) {
 745                         int valid = 0;
 746
 747                         /*-
 748                          * The name has priority over the ifn_index
 749                          * if its given. We do this especially for
 750                          * panda who might recycle indexes fast.
 751                          */
 752                         if (if_name) {
 753                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 754                                         /* They match its a correct delete */
 755                                         valid = 1;
 756                                 }
 757                         }
 758                         if (!valid) {
 759                                 /* last ditch check ifn_index */
 760                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 761                                         valid = 1;
 762                                 }
 763                         }
 764                         if (!valid) {
 765                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 766                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 767                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 768                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 769                                 SCTP_IPI_ADDR_WUNLOCK();
 770                                 return;
 771                         }
 772                 }
 773                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
 774                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 775                 /*
 776                  * We don't set the flag. This means that the structure will
 777                  * hang around in EP's that have bound specific to it until
 778                  * they close. This gives us TCP like behavior if someone
 779                  * removes an address (or for that matter adds it right
 780                  * back).
 781                  */
 782                 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
 783                 vrf->total_ifa_count--;
 784                 LIST_REMOVE(sctp_ifap, next_bucket);
 785                 sctp_remove_ifa_from_ifn(sctp_ifap);
 786         }
 787 #ifdef SCTP_DEBUG
 788         else {
 789                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 790                     ifn_index);
 791                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 792         }
 793 #endif
 794
 795 out_now:
 796         SCTP_IPI_ADDR_WUNLOCK();
 797         if (sctp_ifap) {
 798                 struct sctp_laddr *wi;
 799
 800                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 801                 if (wi == NULL) {
 802                         /*
 803                          * Gak, what can we do? We have lost an address
 804                          * change can you say HOSED?
 805                          */
 806                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 807
 808                         /* Oops, must decrement the count */
 809                         sctp_free_ifa(sctp_ifap);
 810                         return;
 811                 }
 812                 SCTP_INCR_LADDR_COUNT();
 813                 bzero(wi, sizeof(*wi));
 814                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 815                 wi->ifa = sctp_ifap;
 816                 wi->action = SCTP_DEL_IP_ADDRESS;
 817                 SCTP_WQ_ADDR_LOCK();
 818                 /*
 819                  * Should this really be a tailq? As it is we will process
 820                  * the newest first :-0
 821                  */
 822                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 823                 SCTP_WQ_ADDR_UNLOCK();
 824
 825                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 826                     (struct sctp_inpcb *)NULL,
 827                     (struct sctp_tcb *)NULL,
 828                     (struct sctp_nets *)NULL);
 829         }
 830         return;
 831 }
 832
 833
 834 static int
 835 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
 836 {
 837         int loopback_scope;
 838
 839 #if defined(INET)
 840         int ipv4_local_scope, ipv4_addr_legal;
 841
 842 #endif
 843 #if defined(INET6)
 844         int local_scope, site_scope, ipv6_addr_legal;
 845
 846 #endif
 847         struct sctp_vrf *vrf;
 848         struct sctp_ifn *sctp_ifn;
 849         struct sctp_ifa *sctp_ifa;
 850
 851         loopback_scope = stcb->asoc.scope.loopback_scope;
 852 #if defined(INET)
 853         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
 854         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
 855 #endif
 856 #if defined(INET6)
 857         local_scope = stcb->asoc.scope.local_scope;
 858         site_scope = stcb->asoc.scope.site_scope;
 859         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
 860 #endif
 861
 862         SCTP_IPI_ADDR_RLOCK();
 863         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
 864         if (vrf == NULL) {
 865                 /* no vrf, no addresses */
 866                 SCTP_IPI_ADDR_RUNLOCK();
 867                 return (0);
 868         }
 869         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 870                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 871                         if ((loopback_scope == 0) &&
 872                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 873                                 continue;
 874                         }
 875                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 876                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
 877                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
 878                                         /*
 879                                          * We allow pending addresses, where
 880                                          * we have sent an asconf-add to be
 881                                          * considered valid.
 882                                          */
 883                                         continue;
 884                                 }
 885                                 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
 886                                         continue;
 887                                 }
 888                                 switch (sctp_ifa->address.sa.sa_family) {
 889 #ifdef INET
 890                                 case AF_INET:
 891                                         if (ipv4_addr_legal) {
 892                                                 struct sockaddr_in *sin,
 893                                                            *rsin;
 894
 895                                                 sin = &sctp_ifa->address.sin;
 896                                                 rsin = (struct sockaddr_in *)to;
 897                                                 if ((ipv4_local_scope == 0) &&
 898                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 899                                                         continue;
 900                                                 }
 901                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 902                                                         SCTP_IPI_ADDR_RUNLOCK();
 903                                                         return (1);
 904                                                 }
 905                                         }
 906                                         break;
 907 #endif
 908 #ifdef INET6
 909                                 case AF_INET6:
 910                                         if (ipv6_addr_legal) {
 911                                                 struct sockaddr_in6 *sin6,
 912                                                             *rsin6;
 913
 914                                                 sin6 = &sctp_ifa->address.sin6;
 915                                                 rsin6 = (struct sockaddr_in6 *)to;
 916                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 917                                                         if (local_scope == 0)
 918                                                                 continue;
 919                                                         if (sin6->sin6_scope_id == 0) {
 920                                                                 if (sa6_recoverscope(sin6) != 0)
 921                                                                         continue;
 922                                                         }
 923                                                 }
 924                                                 if ((site_scope == 0) &&
 925                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
 926                                                         continue;
 927                                                 }
 928                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 929                                                         SCTP_IPI_ADDR_RUNLOCK();
 930                                                         return (1);
 931                                                 }
 932                                         }
 933                                         break;
 934 #endif
 935                                 default:
 936                                         /* TSNH */
 937                                         break;
 938                                 }
 939                         }
 940                 }
 941         } else {
 942                 struct sctp_laddr *laddr;
 943
 944                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
 945                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 946                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 947                                 continue;
 948                         }
 949                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
 950                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
 951                                 /*
 952                                  * We allow pending addresses, where we have
 953                                  * sent an asconf-add to be considered
 954                                  * valid.
 955                                  */
 956                                 continue;
 957                         }
 958                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
 959                                 continue;
 960                         }
 961                         switch (to->sa_family) {
 962 #ifdef INET
 963                         case AF_INET:
 964                                 {
 965                                         struct sockaddr_in *sin, *rsin;
 966
 967                                         sin = (struct sockaddr_in *)&laddr->ifa->address.sin;
 968                                         rsin = (struct sockaddr_in *)to;
 969                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 970                                                 SCTP_IPI_ADDR_RUNLOCK();
 971                                                 return (1);
 972                                         }
 973                                         break;
 974                                 }
 975 #endif
 976 #ifdef INET6
 977                         case AF_INET6:
 978                                 {
 979                                         struct sockaddr_in6 *sin6, *rsin6;
 980
 981                                         sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6;
 982                                         rsin6 = (struct sockaddr_in6 *)to;
 983                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 984                                                 SCTP_IPI_ADDR_RUNLOCK();
 985                                                 return (1);
 986                                         }
 987                                         break;
 988                                 }
 989
 990 #endif
 991                         default:
 992                                 /* TSNH */
 993                                 break;
 994                         }
 995
 996                 }
 997         }
 998         SCTP_IPI_ADDR_RUNLOCK();
 999         return (0);
1000 }
1001
1002
1003 static struct sctp_tcb *
1004 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1005     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1006 {
1007         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1008         /*
1009          * If we support the TCP model, then we must now dig through to see
1010          * if we can find our endpoint in the list of tcp ep's.
1011          */
1012         uint16_t lport, rport;
1013         struct sctppcbhead *ephead;
1014         struct sctp_inpcb *inp;
1015         struct sctp_laddr *laddr;
1016         struct sctp_tcb *stcb;
1017         struct sctp_nets *net;
1018
1019         if ((to == NULL) || (from == NULL)) {
1020                 return (NULL);
1021         }
1022         switch (to->sa_family) {
1023 #ifdef INET
1024         case AF_INET:
1025                 if (from->sa_family == AF_INET) {
1026                         lport = ((struct sockaddr_in *)to)->sin_port;
1027                         rport = ((struct sockaddr_in *)from)->sin_port;
1028                 } else {
1029                         return (NULL);
1030                 }
1031                 break;
1032 #endif
1033 #ifdef INET6
1034         case AF_INET6:
1035                 if (from->sa_family == AF_INET6) {
1036                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
1037                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
1038                 } else {
1039                         return (NULL);
1040                 }
1041                 break;
1042 #endif
1043         default:
1044                 return (NULL);
1045         }
1046         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1047         /*
1048          * Ok now for each of the guys in this bucket we must look and see:
1049          * - Does the remote port match. - Does there single association's
1050          * addresses match this address (to). If so we update p_ep to point
1051          * to this ep and return the tcb from it.
1052          */
1053         LIST_FOREACH(inp, ephead, sctp_hash) {
1054                 SCTP_INP_RLOCK(inp);
1055                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1056                         SCTP_INP_RUNLOCK(inp);
1057                         continue;
1058                 }
1059                 if (lport != inp->sctp_lport) {
1060                         SCTP_INP_RUNLOCK(inp);
1061                         continue;
1062                 }
1063                 if (inp->def_vrf_id != vrf_id) {
1064                         SCTP_INP_RUNLOCK(inp);
1065                         continue;
1066                 }
1067                 /* check to see if the ep has one of the addresses */
1068                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1069                         /* We are NOT bound all, so look further */
1070                         int match = 0;
1071
1072                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1073
1074                                 if (laddr->ifa == NULL) {
1075                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
1076                                         continue;
1077                                 }
1078                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1079                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1080                                         continue;
1081                                 }
1082                                 if (laddr->ifa->address.sa.sa_family ==
1083                                     to->sa_family) {
1084                                         /* see if it matches */
1085 #ifdef INET
1086                                         if (from->sa_family == AF_INET) {
1087                                                 struct sockaddr_in *intf_addr,
1088                                                            *sin;
1089
1090                                                 intf_addr = &laddr->ifa->address.sin;
1091                                                 sin = (struct sockaddr_in *)to;
1092                                                 if (sin->sin_addr.s_addr ==
1093                                                     intf_addr->sin_addr.s_addr) {
1094                                                         match = 1;
1095                                                         break;
1096                                                 }
1097                                         }
1098 #endif
1099 #ifdef INET6
1100                                         if (from->sa_family == AF_INET6) {
1101                                                 struct sockaddr_in6 *intf_addr6;
1102                                                 struct sockaddr_in6 *sin6;
1103
1104                                                 sin6 = (struct sockaddr_in6 *)
1105                                                     to;
1106                                                 intf_addr6 = &laddr->ifa->address.sin6;
1107
1108                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1109                                                     intf_addr6)) {
1110                                                         match = 1;
1111                                                         break;
1112                                                 }
1113                                         }
1114 #endif
1115                                 }
1116                         }
1117                         if (match == 0) {
1118                                 /* This endpoint does not have this address */
1119                                 SCTP_INP_RUNLOCK(inp);
1120                                 continue;
1121                         }
1122                 }
1123                 /*
1124                  * Ok if we hit here the ep has the address, does it hold
1125                  * the tcb?
1126                  */
1127                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1128                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1129                 if (stcb == NULL) {
1130                         SCTP_INP_RUNLOCK(inp);
1131                         continue;
1132                 }
1133                 SCTP_TCB_LOCK(stcb);
1134                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1135                         SCTP_TCB_UNLOCK(stcb);
1136                         SCTP_INP_RUNLOCK(inp);
1137                         continue;
1138                 }
1139                 if (stcb->rport != rport) {
1140                         /* remote port does not match. */
1141                         SCTP_TCB_UNLOCK(stcb);
1142                         SCTP_INP_RUNLOCK(inp);
1143                         continue;
1144                 }
1145                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1146                         SCTP_TCB_UNLOCK(stcb);
1147                         SCTP_INP_RUNLOCK(inp);
1148                         continue;
1149                 }
1150                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1151                         SCTP_TCB_UNLOCK(stcb);
1152                         SCTP_INP_RUNLOCK(inp);
1153                         continue;
1154                 }
1155                 /* Does this TCB have a matching address? */
1156                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1157
1158                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1159                                 /* not the same family, can't be a match */
1160                                 continue;
1161                         }
1162                         switch (from->sa_family) {
1163 #ifdef INET
1164                         case AF_INET:
1165                                 {
1166                                         struct sockaddr_in *sin, *rsin;
1167
1168                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
1169                                         rsin = (struct sockaddr_in *)from;
1170                                         if (sin->sin_addr.s_addr ==
1171                                             rsin->sin_addr.s_addr) {
1172                                                 /* found it */
1173                                                 if (netp != NULL) {
1174                                                         *netp = net;
1175                                                 }
1176                                                 /*
1177                                                  * Update the endpoint
1178                                                  * pointer
1179                                                  */
1180                                                 *inp_p = inp;
1181                                                 SCTP_INP_RUNLOCK(inp);
1182                                                 return (stcb);
1183                                         }
1184                                         break;
1185                                 }
1186 #endif
1187 #ifdef INET6
1188                         case AF_INET6:
1189                                 {
1190                                         struct sockaddr_in6 *sin6, *rsin6;
1191
1192                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1193                                         rsin6 = (struct sockaddr_in6 *)from;
1194                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1195                                             rsin6)) {
1196                                                 /* found it */
1197                                                 if (netp != NULL) {
1198                                                         *netp = net;
1199                                                 }
1200                                                 /*
1201                                                  * Update the endpoint
1202                                                  * pointer
1203                                                  */
1204                                                 *inp_p = inp;
1205                                                 SCTP_INP_RUNLOCK(inp);
1206                                                 return (stcb);
1207                                         }
1208                                         break;
1209                                 }
1210 #endif
1211                         default:
1212                                 /* TSNH */
1213                                 break;
1214                         }
1215                 }
1216                 SCTP_TCB_UNLOCK(stcb);
1217                 SCTP_INP_RUNLOCK(inp);
1218         }
1219         return (NULL);
1220 }
1221
1222
1223 /*
1224  * rules for use
1225  *
1226  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1227  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1228  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1229  * NULL.
1230  */
1231
1232 struct sctp_tcb *
1233 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1234     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1235 {
1236         struct sctpasochead *head;
1237         struct sctp_inpcb *inp;
1238         struct sctp_tcb *stcb = NULL;
1239         struct sctp_nets *net;
1240         uint16_t rport;
1241
1242         inp = *inp_p;
1243         switch (remote->sa_family) {
1244 #ifdef INET
1245         case AF_INET:
1246                 rport = (((struct sockaddr_in *)remote)->sin_port);
1247                 break;
1248 #endif
1249 #ifdef INET6
1250         case AF_INET6:
1251                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1252                 break;
1253 #endif
1254         default:
1255                 return (NULL);
1256         }
1257         if (locked_tcb) {
1258                 /*
1259                  * UN-lock so we can do proper locking here this occurs when
1260                  * called from load_addresses_from_init.
1261                  */
1262                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1263                 SCTP_TCB_UNLOCK(locked_tcb);
1264         }
1265         SCTP_INP_INFO_RLOCK();
1266         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1267             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1268                 /*-
1269                  * Now either this guy is our listener or it's the
1270                  * connector. If it is the one that issued the connect, then
1271                  * it's only chance is to be the first TCB in the list. If
1272                  * it is the acceptor, then do the special_lookup to hash
1273                  * and find the real inp.
1274                  */
1275                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1276                         /* to is peer addr, from is my addr */
1277                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1278                             netp, inp->def_vrf_id);
1279                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1280                                 /* we have a locked tcb, lower refcount */
1281                                 SCTP_INP_DECR_REF(inp);
1282                         }
1283                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1284                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1285                                 SCTP_TCB_LOCK(locked_tcb);
1286                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1287                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1288                         }
1289                         SCTP_INP_INFO_RUNLOCK();
1290                         return (stcb);
1291                 } else {
1292                         SCTP_INP_WLOCK(inp);
1293                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1294                                 goto null_return;
1295                         }
1296                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1297                         if (stcb == NULL) {
1298                                 goto null_return;
1299                         }
1300                         SCTP_TCB_LOCK(stcb);
1301
1302                         if (stcb->rport != rport) {
1303                                 /* remote port does not match. */
1304                                 SCTP_TCB_UNLOCK(stcb);
1305                                 goto null_return;
1306                         }
1307                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1308                                 SCTP_TCB_UNLOCK(stcb);
1309                                 goto null_return;
1310                         }
1311                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1312                                 SCTP_TCB_UNLOCK(stcb);
1313                                 goto null_return;
1314                         }
1315                         /* now look at the list of remote addresses */
1316                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1317 #ifdef INVARIANTS
1318                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1319                                         panic("Corrupt net list");
1320                                 }
1321 #endif
1322                                 if (net->ro._l_addr.sa.sa_family !=
1323                                     remote->sa_family) {
1324                                         /* not the same family */
1325                                         continue;
1326                                 }
1327                                 switch (remote->sa_family) {
1328 #ifdef INET
1329                                 case AF_INET:
1330                                         {
1331                                                 struct sockaddr_in *sin,
1332                                                            *rsin;
1333
1334                                                 sin = (struct sockaddr_in *)
1335                                                     &net->ro._l_addr;
1336                                                 rsin = (struct sockaddr_in *)remote;
1337                                                 if (sin->sin_addr.s_addr ==
1338                                                     rsin->sin_addr.s_addr) {
1339                                                         /* found it */
1340                                                         if (netp != NULL) {
1341                                                                 *netp = net;
1342                                                         }
1343                                                         if (locked_tcb == NULL) {
1344                                                                 SCTP_INP_DECR_REF(inp);
1345                                                         } else if (locked_tcb != stcb) {
1346                                                                 SCTP_TCB_LOCK(locked_tcb);
1347                                                         }
1348                                                         if (locked_tcb) {
1349                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1350                                                         }
1351                                                         SCTP_INP_WUNLOCK(inp);
1352                                                         SCTP_INP_INFO_RUNLOCK();
1353                                                         return (stcb);
1354                                                 }
1355                                                 break;
1356                                         }
1357 #endif
1358 #ifdef INET6
1359                                 case AF_INET6:
1360                                         {
1361                                                 struct sockaddr_in6 *sin6,
1362                                                             *rsin6;
1363
1364                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1365                                                 rsin6 = (struct sockaddr_in6 *)remote;
1366                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1367                                                     rsin6)) {
1368                                                         /* found it */
1369                                                         if (netp != NULL) {
1370                                                                 *netp = net;
1371                                                         }
1372                                                         if (locked_tcb == NULL) {
1373                                                                 SCTP_INP_DECR_REF(inp);
1374                                                         } else if (locked_tcb != stcb) {
1375                                                                 SCTP_TCB_LOCK(locked_tcb);
1376                                                         }
1377                                                         if (locked_tcb) {
1378                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1379                                                         }
1380                                                         SCTP_INP_WUNLOCK(inp);
1381                                                         SCTP_INP_INFO_RUNLOCK();
1382                                                         return (stcb);
1383                                                 }
1384                                                 break;
1385                                         }
1386 #endif
1387                                 default:
1388                                         /* TSNH */
1389                                         break;
1390                                 }
1391                         }
1392                         SCTP_TCB_UNLOCK(stcb);
1393                 }
1394         } else {
1395                 SCTP_INP_WLOCK(inp);
1396                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1397                         goto null_return;
1398                 }
1399                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1400                     inp->sctp_hashmark)];
1401                 if (head == NULL) {
1402                         goto null_return;
1403                 }
1404                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1405                         if (stcb->rport != rport) {
1406                                 /* remote port does not match */
1407                                 continue;
1408                         }
1409                         SCTP_TCB_LOCK(stcb);
1410                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1411                                 SCTP_TCB_UNLOCK(stcb);
1412                                 continue;
1413                         }
1414                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1415                                 SCTP_TCB_UNLOCK(stcb);
1416                                 continue;
1417                         }
1418                         /* now look at the list of remote addresses */
1419                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1420 #ifdef INVARIANTS
1421                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1422                                         panic("Corrupt net list");
1423                                 }
1424 #endif
1425                                 if (net->ro._l_addr.sa.sa_family !=
1426                                     remote->sa_family) {
1427                                         /* not the same family */
1428                                         continue;
1429                                 }
1430                                 switch (remote->sa_family) {
1431 #ifdef INET
1432                                 case AF_INET:
1433                                         {
1434                                                 struct sockaddr_in *sin,
1435                                                            *rsin;
1436
1437                                                 sin = (struct sockaddr_in *)
1438                                                     &net->ro._l_addr;
1439                                                 rsin = (struct sockaddr_in *)remote;
1440                                                 if (sin->sin_addr.s_addr ==
1441                                                     rsin->sin_addr.s_addr) {
1442                                                         /* found it */
1443                                                         if (netp != NULL) {
1444                                                                 *netp = net;
1445                                                         }
1446                                                         if (locked_tcb == NULL) {
1447                                                                 SCTP_INP_DECR_REF(inp);
1448                                                         } else if (locked_tcb != stcb) {
1449                                                                 SCTP_TCB_LOCK(locked_tcb);
1450                                                         }
1451                                                         if (locked_tcb) {
1452                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1453                                                         }
1454                                                         SCTP_INP_WUNLOCK(inp);
1455                                                         SCTP_INP_INFO_RUNLOCK();
1456                                                         return (stcb);
1457                                                 }
1458                                                 break;
1459                                         }
1460 #endif
1461 #ifdef INET6
1462                                 case AF_INET6:
1463                                         {
1464                                                 struct sockaddr_in6 *sin6,
1465                                                             *rsin6;
1466
1467                                                 sin6 = (struct sockaddr_in6 *)
1468                                                     &net->ro._l_addr;
1469                                                 rsin6 = (struct sockaddr_in6 *)remote;
1470                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1471                                                     rsin6)) {
1472                                                         /* found it */
1473                                                         if (netp != NULL) {
1474                                                                 *netp = net;
1475                                                         }
1476                                                         if (locked_tcb == NULL) {
1477                                                                 SCTP_INP_DECR_REF(inp);
1478                                                         } else if (locked_tcb != stcb) {
1479                                                                 SCTP_TCB_LOCK(locked_tcb);
1480                                                         }
1481                                                         if (locked_tcb) {
1482                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1483                                                         }
1484                                                         SCTP_INP_WUNLOCK(inp);
1485                                                         SCTP_INP_INFO_RUNLOCK();
1486                                                         return (stcb);
1487                                                 }
1488                                                 break;
1489                                         }
1490 #endif
1491                                 default:
1492                                         /* TSNH */
1493                                         break;
1494                                 }
1495                         }
1496                         SCTP_TCB_UNLOCK(stcb);
1497                 }
1498         }
1499 null_return:
1500         /* clean up for returning null */
1501         if (locked_tcb) {
1502                 SCTP_TCB_LOCK(locked_tcb);
1503                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1504         }
1505         SCTP_INP_WUNLOCK(inp);
1506         SCTP_INP_INFO_RUNLOCK();
1507         /* not found */
1508         return (NULL);
1509 }
1510
1511
1512 /*
1513  * Find an association for a specific endpoint using the association id given
1514  * out in the COMM_UP notification
1515  */
1516 struct sctp_tcb *
1517 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1518 {
1519         /*
1520          * Use my the assoc_id to find a endpoint
1521          */
1522         struct sctpasochead *head;
1523         struct sctp_tcb *stcb;
1524         uint32_t id;
1525
1526         if (inp == NULL) {
1527                 SCTP_PRINTF("TSNH ep_associd\n");
1528                 return (NULL);
1529         }
1530         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1531                 SCTP_PRINTF("TSNH ep_associd0\n");
1532                 return (NULL);
1533         }
1534         id = (uint32_t) asoc_id;
1535         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1536         if (head == NULL) {
1537                 /* invalid id TSNH */
1538                 SCTP_PRINTF("TSNH ep_associd1\n");
1539                 return (NULL);
1540         }
1541         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1542                 if (stcb->asoc.assoc_id == id) {
1543                         if (inp != stcb->sctp_ep) {
1544                                 /*
1545                                  * some other guy has the same id active (id
1546                                  * collision ??).
1547                                  */
1548                                 SCTP_PRINTF("TSNH ep_associd2\n");
1549                                 continue;
1550                         }
1551                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1552                                 continue;
1553                         }
1554                         if (want_lock) {
1555                                 SCTP_TCB_LOCK(stcb);
1556                         }
1557                         return (stcb);
1558                 }
1559         }
1560         return (NULL);
1561 }
1562
1563
1564 struct sctp_tcb *
1565 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1566 {
1567         struct sctp_tcb *stcb;
1568
1569         SCTP_INP_RLOCK(inp);
1570         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1571         SCTP_INP_RUNLOCK(inp);
1572         return (stcb);
1573 }
1574
1575
1576 /*
1577  * Endpoint probe expects that the INP_INFO is locked.
1578  */
1579 static struct sctp_inpcb *
1580 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1581     uint16_t lport, uint32_t vrf_id)
1582 {
1583         struct sctp_inpcb *inp;
1584         struct sctp_laddr *laddr;
1585
1586 #ifdef INET
1587         struct sockaddr_in *sin;
1588
1589 #endif
1590 #ifdef INET6
1591         struct sockaddr_in6 *sin6;
1592         struct sockaddr_in6 *intf_addr6;
1593
1594 #endif
1595         int fnd;
1596
1597 #ifdef INET
1598         sin = NULL;
1599 #endif
1600 #ifdef INET6
1601         sin6 = NULL;
1602 #endif
1603         switch (nam->sa_family) {
1604 #ifdef INET
1605         case AF_INET:
1606                 sin = (struct sockaddr_in *)nam;
1607                 break;
1608 #endif
1609 #ifdef INET6
1610         case AF_INET6:
1611                 sin6 = (struct sockaddr_in6 *)nam;
1612                 break;
1613 #endif
1614         default:
1615                 /* unsupported family */
1616                 return (NULL);
1617         }
1618
1619         if (head == NULL)
1620                 return (NULL);
1621
1622         LIST_FOREACH(inp, head, sctp_hash) {
1623                 SCTP_INP_RLOCK(inp);
1624                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1625                         SCTP_INP_RUNLOCK(inp);
1626                         continue;
1627                 }
1628                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1629                     (inp->sctp_lport == lport)) {
1630                         /* got it */
1631 #ifdef INET
1632                         if ((nam->sa_family == AF_INET) &&
1633                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1634                             SCTP_IPV6_V6ONLY(inp)) {
1635                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1636                                 SCTP_INP_RUNLOCK(inp);
1637                                 continue;
1638                         }
1639 #endif
1640 #ifdef INET6
1641                         /* A V6 address and the endpoint is NOT bound V6 */
1642                         if (nam->sa_family == AF_INET6 &&
1643                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1644                                 SCTP_INP_RUNLOCK(inp);
1645                                 continue;
1646                         }
1647 #endif
1648                         /* does a VRF id match? */
1649                         fnd = 0;
1650                         if (inp->def_vrf_id == vrf_id)
1651                                 fnd = 1;
1652
1653                         SCTP_INP_RUNLOCK(inp);
1654                         if (!fnd)
1655                                 continue;
1656                         return (inp);
1657                 }
1658                 SCTP_INP_RUNLOCK(inp);
1659         }
1660         switch (nam->sa_family) {
1661 #ifdef INET
1662         case AF_INET:
1663                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1664                         /* Can't hunt for one that has no address specified */
1665                         return (NULL);
1666                 }
1667                 break;
1668 #endif
1669 #ifdef INET6
1670         case AF_INET6:
1671                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1672                         /* Can't hunt for one that has no address specified */
1673                         return (NULL);
1674                 }
1675                 break;
1676 #endif
1677         default:
1678                 break;
1679         }
1680         /*
1681          * ok, not bound to all so see if we can find a EP bound to this
1682          * address.
1683          */
1684         LIST_FOREACH(inp, head, sctp_hash) {
1685                 SCTP_INP_RLOCK(inp);
1686                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1687                         SCTP_INP_RUNLOCK(inp);
1688                         continue;
1689                 }
1690                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1691                         SCTP_INP_RUNLOCK(inp);
1692                         continue;
1693                 }
1694                 /*
1695                  * Ok this could be a likely candidate, look at all of its
1696                  * addresses
1697                  */
1698                 if (inp->sctp_lport != lport) {
1699                         SCTP_INP_RUNLOCK(inp);
1700                         continue;
1701                 }
1702                 /* does a VRF id match? */
1703                 fnd = 0;
1704                 if (inp->def_vrf_id == vrf_id)
1705                         fnd = 1;
1706
1707                 if (!fnd) {
1708                         SCTP_INP_RUNLOCK(inp);
1709                         continue;
1710                 }
1711                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1712                         if (laddr->ifa == NULL) {
1713                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1714                                     __FUNCTION__);
1715                                 continue;
1716                         }
1717                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1718                             (void *)laddr->ifa);
1719                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1720                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1721                                 continue;
1722                         }
1723                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1724                                 /* possible, see if it matches */
1725                                 switch (nam->sa_family) {
1726 #ifdef INET
1727                                 case AF_INET:
1728                                         if (sin->sin_addr.s_addr ==
1729                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1730                                                 SCTP_INP_RUNLOCK(inp);
1731                                                 return (inp);
1732                                         }
1733                                         break;
1734 #endif
1735 #ifdef INET6
1736                                 case AF_INET6:
1737                                         intf_addr6 = &laddr->ifa->address.sin6;
1738                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1739                                             intf_addr6)) {
1740                                                 SCTP_INP_RUNLOCK(inp);
1741                                                 return (inp);
1742                                         }
1743                                         break;
1744 #endif
1745                                 }
1746                         }
1747                 }
1748                 SCTP_INP_RUNLOCK(inp);
1749         }
1750         return (NULL);
1751 }
1752
1753
1754 static struct sctp_inpcb *
1755 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1756 {
1757         struct sctppcbhead *head;
1758         struct sctp_inpcb *t_inp;
1759         int fnd;
1760
1761         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1762             SCTP_BASE_INFO(hashmark))];
1763         LIST_FOREACH(t_inp, head, sctp_hash) {
1764                 if (t_inp->sctp_lport != lport) {
1765                         continue;
1766                 }
1767                 /* is it in the VRF in question */
1768                 fnd = 0;
1769                 if (t_inp->def_vrf_id == vrf_id)
1770                         fnd = 1;
1771                 if (!fnd)
1772                         continue;
1773
1774                 /* This one is in use. */
1775                 /* check the v6/v4 binding issue */
1776                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1777                     SCTP_IPV6_V6ONLY(t_inp)) {
1778                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1779                                 /* collision in V6 space */
1780                                 return (t_inp);
1781                         } else {
1782                                 /* inp is BOUND_V4 no conflict */
1783                                 continue;
1784                         }
1785                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1786                         /* t_inp is bound v4 and v6, conflict always */
1787                         return (t_inp);
1788                 } else {
1789                         /* t_inp is bound only V4 */
1790                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1791                             SCTP_IPV6_V6ONLY(inp)) {
1792                                 /* no conflict */
1793                                 continue;
1794                         }
1795                         /* else fall through to conflict */
1796                 }
1797                 return (t_inp);
1798         }
1799         return (NULL);
1800 }
1801
1802
1803 int
1804 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1805 {
1806         /* For 1-2-1 with port reuse */
1807         struct sctppcbhead *head;
1808         struct sctp_inpcb *tinp;
1809
1810         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1811                 /* only works with port reuse on */
1812                 return (-1);
1813         }
1814         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1815                 return (0);
1816         }
1817         SCTP_INP_RUNLOCK(inp);
1818         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1819             SCTP_BASE_INFO(hashmark))];
1820         /* Kick out all non-listeners to the TCP hash */
1821         LIST_FOREACH(tinp, head, sctp_hash) {
1822                 if (tinp->sctp_lport != inp->sctp_lport) {
1823                         continue;
1824                 }
1825                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1826                         continue;
1827                 }
1828                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1829                         continue;
1830                 }
1831                 if (tinp->sctp_socket->so_qlimit) {
1832                         continue;
1833                 }
1834                 SCTP_INP_WLOCK(tinp);
1835                 LIST_REMOVE(tinp, sctp_hash);
1836                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1837                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1838                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1839                 SCTP_INP_WUNLOCK(tinp);
1840         }
1841         SCTP_INP_WLOCK(inp);
1842         /* Pull from where he was */
1843         LIST_REMOVE(inp, sctp_hash);
1844         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1845         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1846         LIST_INSERT_HEAD(head, inp, sctp_hash);
1847         SCTP_INP_WUNLOCK(inp);
1848         SCTP_INP_RLOCK(inp);
1849         return (0);
1850 }
1851
1852
1853 struct sctp_inpcb *
1854 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1855     uint32_t vrf_id)
1856 {
1857         /*
1858          * First we check the hash table to see if someone has this port
1859          * bound with just the port.
1860          */
1861         struct sctp_inpcb *inp;
1862         struct sctppcbhead *head;
1863         int lport;
1864         unsigned int i;
1865
1866 #ifdef INET
1867         struct sockaddr_in *sin;
1868
1869 #endif
1870 #ifdef INET6
1871         struct sockaddr_in6 *sin6;
1872
1873 #endif
1874
1875         switch (nam->sa_family) {
1876 #ifdef INET
1877         case AF_INET:
1878                 sin = (struct sockaddr_in *)nam;
1879                 lport = sin->sin_port;
1880                 break;
1881 #endif
1882 #ifdef INET6
1883         case AF_INET6:
1884                 sin6 = (struct sockaddr_in6 *)nam;
1885                 lport = sin6->sin6_port;
1886                 break;
1887 #endif
1888         default:
1889                 return (NULL);
1890         }
1891         /*
1892          * I could cheat here and just cast to one of the types but we will
1893          * do it right. It also provides the check against an Unsupported
1894          * type too.
1895          */
1896         /* Find the head of the ALLADDR chain */
1897         if (have_lock == 0) {
1898                 SCTP_INP_INFO_RLOCK();
1899         }
1900         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1901             SCTP_BASE_INFO(hashmark))];
1902         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1903
1904         /*
1905          * If the TCP model exists it could be that the main listening
1906          * endpoint is gone but there still exists a connected socket for
1907          * this guy. If so we can return the first one that we find. This
1908          * may NOT be the correct one so the caller should be wary on the
1909          * returned INP. Currently the only caller that sets find_tcp_pool
1910          * is in bindx where we are verifying that a user CAN bind the
1911          * address. He either has bound it already, or someone else has, or
1912          * its open to bind, so this is good enough.
1913          */
1914         if (inp == NULL && find_tcp_pool) {
1915                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1916                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1917                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1918                         if (inp) {
1919                                 break;
1920                         }
1921                 }
1922         }
1923         if (inp) {
1924                 SCTP_INP_INCR_REF(inp);
1925         }
1926         if (have_lock == 0) {
1927                 SCTP_INP_INFO_RUNLOCK();
1928         }
1929         return (inp);
1930 }
1931
1932
1933 /*
1934  * Find an association for an endpoint with the pointer to whom you want to
1935  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1936  * need to change the *to to some other struct like a mbuf...
1937  */
1938 struct sctp_tcb *
1939 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
1940     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1941     uint32_t vrf_id)
1942 {
1943         struct sctp_inpcb *inp = NULL;
1944         struct sctp_tcb *stcb;
1945
1946         SCTP_INP_INFO_RLOCK();
1947         if (find_tcp_pool) {
1948                 if (inp_p != NULL) {
1949                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
1950                             vrf_id);
1951                 } else {
1952                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
1953                             vrf_id);
1954                 }
1955                 if (stcb != NULL) {
1956                         SCTP_INP_INFO_RUNLOCK();
1957                         return (stcb);
1958                 }
1959         }
1960         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1961         if (inp_p != NULL) {
1962                 *inp_p = inp;
1963         }
1964         SCTP_INP_INFO_RUNLOCK();
1965         if (inp == NULL) {
1966                 return (NULL);
1967         }
1968         /*
1969          * ok, we have an endpoint, now lets find the assoc for it (if any)
1970          * we now place the source address or from in the to of the find
1971          * endpoint call. Since in reality this chain is used from the
1972          * inbound packet side.
1973          */
1974         if (inp_p != NULL) {
1975                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1976                     NULL);
1977         } else {
1978                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
1979                     NULL);
1980         }
1981         return (stcb);
1982 }
1983
1984
1985 /*
1986  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1987  * find all addresses that the sender has specified in any address list. Each
1988  * address will be used to lookup the TCB and see if one exits.
1989  */
1990 static struct sctp_tcb *
1991 sctp_findassociation_special_addr(struct mbuf *m, int offset,
1992     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1993     struct sockaddr *dst)
1994 {
1995         struct sctp_paramhdr *phdr, parm_buf;
1996
1997 #if defined(INET) || defined(INET6)
1998         struct sctp_tcb *stcb;
1999         uint16_t ptype;
2000
2001 #endif
2002         uint16_t plen;
2003
2004 #ifdef INET
2005         struct sockaddr_in sin4;
2006
2007 #endif
2008 #ifdef INET6
2009         struct sockaddr_in6 sin6;
2010
2011 #endif
2012
2013 #ifdef INET
2014         memset(&sin4, 0, sizeof(sin4));
2015         sin4.sin_len = sizeof(sin4);
2016         sin4.sin_family = AF_INET;
2017         sin4.sin_port = sh->src_port;
2018 #endif
2019 #ifdef INET6
2020         memset(&sin6, 0, sizeof(sin6));
2021         sin6.sin6_len = sizeof(sin6);
2022         sin6.sin6_family = AF_INET6;
2023         sin6.sin6_port = sh->src_port;
2024 #endif
2025
2026         offset += sizeof(struct sctp_init_chunk);
2027
2028         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
2029         while (phdr != NULL) {
2030                 /* now we must see if we want the parameter */
2031 #if defined(INET) || defined(INET6)
2032                 ptype = ntohs(phdr->param_type);
2033 #endif
2034                 plen = ntohs(phdr->param_length);
2035                 if (plen == 0) {
2036                         break;
2037                 }
2038 #ifdef INET
2039                 if (ptype == SCTP_IPV4_ADDRESS &&
2040                     plen == sizeof(struct sctp_ipv4addr_param)) {
2041                         /* Get the rest of the address */
2042                         struct sctp_ipv4addr_param ip4_parm, *p4;
2043
2044                         phdr = sctp_get_next_param(m, offset,
2045                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2046                         if (phdr == NULL) {
2047                                 return (NULL);
2048                         }
2049                         p4 = (struct sctp_ipv4addr_param *)phdr;
2050                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2051                         /* look it up */
2052                         stcb = sctp_findassociation_ep_addr(inp_p,
2053                             (struct sockaddr *)&sin4, netp, dst, NULL);
2054                         if (stcb != NULL) {
2055                                 return (stcb);
2056                         }
2057                 }
2058 #endif
2059 #ifdef INET6
2060                 if (ptype == SCTP_IPV6_ADDRESS &&
2061                     plen == sizeof(struct sctp_ipv6addr_param)) {
2062                         /* Get the rest of the address */
2063                         struct sctp_ipv6addr_param ip6_parm, *p6;
2064
2065                         phdr = sctp_get_next_param(m, offset,
2066                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
2067                         if (phdr == NULL) {
2068                                 return (NULL);
2069                         }
2070                         p6 = (struct sctp_ipv6addr_param *)phdr;
2071                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2072                         /* look it up */
2073                         stcb = sctp_findassociation_ep_addr(inp_p,
2074                             (struct sockaddr *)&sin6, netp, dst, NULL);
2075                         if (stcb != NULL) {
2076                                 return (stcb);
2077                         }
2078                 }
2079 #endif
2080                 offset += SCTP_SIZE32(plen);
2081                 phdr = sctp_get_next_param(m, offset, &parm_buf,
2082                     sizeof(parm_buf));
2083         }
2084         return (NULL);
2085 }
2086
2087 static struct sctp_tcb *
2088 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2089     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2090     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2091 {
2092         /*
2093          * Use my vtag to hash. If we find it we then verify the source addr
2094          * is in the assoc. If all goes well we save a bit on rec of a
2095          * packet.
2096          */
2097         struct sctpasochead *head;
2098         struct sctp_nets *net;
2099         struct sctp_tcb *stcb;
2100
2101         SCTP_INP_INFO_RLOCK();
2102         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2103             SCTP_BASE_INFO(hashasocmark))];
2104         if (head == NULL) {
2105                 /* invalid vtag */
2106                 SCTP_INP_INFO_RUNLOCK();
2107                 return (NULL);
2108         }
2109         LIST_FOREACH(stcb, head, sctp_asocs) {
2110                 SCTP_INP_RLOCK(stcb->sctp_ep);
2111                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2112                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2113                         continue;
2114                 }
2115                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2116                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2117                         continue;
2118                 }
2119                 SCTP_TCB_LOCK(stcb);
2120                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2121                 if (stcb->asoc.my_vtag == vtag) {
2122                         /* candidate */
2123                         if (stcb->rport != rport) {
2124                                 SCTP_TCB_UNLOCK(stcb);
2125                                 continue;
2126                         }
2127                         if (stcb->sctp_ep->sctp_lport != lport) {
2128                                 SCTP_TCB_UNLOCK(stcb);
2129                                 continue;
2130                         }
2131                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2132                                 SCTP_TCB_UNLOCK(stcb);
2133                                 continue;
2134                         }
2135                         /* RRS:Need toaddr check here */
2136                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2137                                 /* Endpoint does not own this address */
2138                                 SCTP_TCB_UNLOCK(stcb);
2139                                 continue;
2140                         }
2141                         if (remote_tag) {
2142                                 /*
2143                                  * If we have both vtags that's all we match
2144                                  * on
2145                                  */
2146                                 if (stcb->asoc.peer_vtag == remote_tag) {
2147                                         /*
2148                                          * If both tags match we consider it
2149                                          * conclusive and check NO
2150                                          * source/destination addresses
2151                                          */
2152                                         goto conclusive;
2153                                 }
2154                         }
2155                         if (skip_src_check) {
2156                 conclusive:
2157                                 if (from) {
2158                                         *netp = sctp_findnet(stcb, from);
2159                                 } else {
2160                                         *netp = NULL;   /* unknown */
2161                                 }
2162                                 if (inp_p)
2163                                         *inp_p = stcb->sctp_ep;
2164                                 SCTP_INP_INFO_RUNLOCK();
2165                                 return (stcb);
2166                         }
2167                         net = sctp_findnet(stcb, from);
2168                         if (net) {
2169                                 /* yep its him. */
2170                                 *netp = net;
2171                                 SCTP_STAT_INCR(sctps_vtagexpress);
2172                                 *inp_p = stcb->sctp_ep;
2173                                 SCTP_INP_INFO_RUNLOCK();
2174                                 return (stcb);
2175                         } else {
2176                                 /*
2177                                  * not him, this should only happen in rare
2178                                  * cases so I peg it.
2179                                  */
2180                                 SCTP_STAT_INCR(sctps_vtagbogus);
2181                         }
2182                 }
2183                 SCTP_TCB_UNLOCK(stcb);
2184         }
2185         SCTP_INP_INFO_RUNLOCK();
2186         return (NULL);
2187 }
2188
2189
2190 /*
2191  * Find an association with the pointer to the inbound IP packet. This can be
2192  * a IPv4 or IPv6 packet.
2193  */
2194 struct sctp_tcb *
2195 sctp_findassociation_addr(struct mbuf *m, int offset,
2196     struct sockaddr *src, struct sockaddr *dst,
2197     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2198     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2199 {
2200         int find_tcp_pool;
2201         struct sctp_tcb *stcb;
2202         struct sctp_inpcb *inp;
2203
2204         if (sh->v_tag) {
2205                 /* we only go down this path if vtag is non-zero */
2206                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2207                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2208                 if (stcb) {
2209                         return (stcb);
2210                 }
2211         }
2212         find_tcp_pool = 0;
2213         if ((ch->chunk_type != SCTP_INITIATION) &&
2214             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2215             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2216             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2217                 /* Other chunk types go to the tcp pool. */
2218                 find_tcp_pool = 1;
2219         }
2220         if (inp_p) {
2221                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2222                     find_tcp_pool, vrf_id);
2223                 inp = *inp_p;
2224         } else {
2225                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2226                     find_tcp_pool, vrf_id);
2227         }
2228         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2229         if (stcb == NULL && inp) {
2230                 /* Found a EP but not this address */
2231                 if ((ch->chunk_type == SCTP_INITIATION) ||
2232                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2233                         /*-
2234                          * special hook, we do NOT return linp or an
2235                          * association that is linked to an existing
2236                          * association that is under the TCP pool (i.e. no
2237                          * listener exists). The endpoint finding routine
2238                          * will always find a listener before examining the
2239                          * TCP pool.
2240                          */
2241                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2242                                 if (inp_p) {
2243                                         *inp_p = NULL;
2244                                 }
2245                                 return (NULL);
2246                         }
2247                         stcb = sctp_findassociation_special_addr(m,
2248                             offset, sh, &inp, netp, dst);
2249                         if (inp_p != NULL) {
2250                                 *inp_p = inp;
2251                         }
2252                 }
2253         }
2254         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2255         return (stcb);
2256 }
2257
2258 /*
2259  * lookup an association by an ASCONF lookup address.
2260  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2261  */
2262 struct sctp_tcb *
2263 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2264     struct sockaddr *dst, struct sctphdr *sh,
2265     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2266 {
2267         struct sctp_tcb *stcb;
2268         struct sockaddr_storage remote_store;
2269         struct sctp_paramhdr parm_buf, *phdr;
2270         int ptype;
2271         int zero_address = 0;
2272
2273 #ifdef INET
2274         struct sockaddr_in *sin;
2275
2276 #endif
2277 #ifdef INET6
2278         struct sockaddr_in6 *sin6;
2279
2280 #endif
2281
2282         memset(&remote_store, 0, sizeof(remote_store));
2283         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2284             &parm_buf, sizeof(struct sctp_paramhdr));
2285         if (phdr == NULL) {
2286                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2287                     __FUNCTION__);
2288                 return NULL;
2289         }
2290         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2291         /* get the correlation address */
2292         switch (ptype) {
2293 #ifdef INET6
2294         case SCTP_IPV6_ADDRESS:
2295                 {
2296                         /* ipv6 address param */
2297                         struct sctp_ipv6addr_param *p6, p6_buf;
2298
2299                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2300                                 return NULL;
2301                         }
2302                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2303                             offset + sizeof(struct sctp_asconf_chunk),
2304                             &p6_buf.ph, sizeof(*p6));
2305                         if (p6 == NULL) {
2306                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2307                                     __FUNCTION__);
2308                                 return (NULL);
2309                         }
2310                         sin6 = (struct sockaddr_in6 *)&remote_store;
2311                         sin6->sin6_family = AF_INET6;
2312                         sin6->sin6_len = sizeof(*sin6);
2313                         sin6->sin6_port = sh->src_port;
2314                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2315                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2316                                 zero_address = 1;
2317                         break;
2318                 }
2319 #endif
2320 #ifdef INET
2321         case SCTP_IPV4_ADDRESS:
2322                 {
2323                         /* ipv4 address param */
2324                         struct sctp_ipv4addr_param *p4, p4_buf;
2325
2326                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2327                                 return NULL;
2328                         }
2329                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2330                             offset + sizeof(struct sctp_asconf_chunk),
2331                             &p4_buf.ph, sizeof(*p4));
2332                         if (p4 == NULL) {
2333                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2334                                     __FUNCTION__);
2335                                 return (NULL);
2336                         }
2337                         sin = (struct sockaddr_in *)&remote_store;
2338                         sin->sin_family = AF_INET;
2339                         sin->sin_len = sizeof(*sin);
2340                         sin->sin_port = sh->src_port;
2341                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2342                         if (sin->sin_addr.s_addr == INADDR_ANY)
2343                                 zero_address = 1;
2344                         break;
2345                 }
2346 #endif
2347         default:
2348                 /* invalid address param type */
2349                 return NULL;
2350         }
2351
2352         if (zero_address) {
2353                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2354                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2355                 if (stcb != NULL) {
2356                         SCTP_INP_DECR_REF(*inp_p);
2357                 }
2358         } else {
2359                 stcb = sctp_findassociation_ep_addr(inp_p,
2360                     (struct sockaddr *)&remote_store, netp,
2361                     dst, NULL);
2362         }
2363         return (stcb);
2364 }
2365
2366
2367 /*
2368  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2369  * addresses. This way if we don't get a bind we by default pick a ephemeral
2370  * port with all addresses bound.
2371  */
2372 int
2373 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2374 {
2375         /*
2376          * we get called when a new endpoint starts up. We need to allocate
2377          * the sctp_inpcb structure from the zone and init it. Mark it as
2378          * unbound and find a port that we can use as an ephemeral with
2379          * INADDR_ANY. If the user binds later no problem we can then add in
2380          * the specific addresses. And setup the default parameters for the
2381          * EP.
2382          */
2383         int i, error;
2384         struct sctp_inpcb *inp;
2385         struct sctp_pcb *m;
2386         struct timeval time;
2387         sctp_sharedkey_t *null_key;
2388
2389         error = 0;
2390
2391         SCTP_INP_INFO_WLOCK();
2392         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2393         if (inp == NULL) {
2394                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2395                 SCTP_INP_INFO_WUNLOCK();
2396                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2397                 return (ENOBUFS);
2398         }
2399         /* zap it */
2400         bzero(inp, sizeof(*inp));
2401
2402         /* bump generations */
2403         /* setup socket pointers */
2404         inp->sctp_socket = so;
2405         inp->ip_inp.inp.inp_socket = so;
2406 #ifdef INET6
2407         if (INP_SOCKAF(so) == AF_INET6) {
2408                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2409                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2410                 }
2411                 if (MODULE_GLOBAL(ip6_v6only)) {
2412                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2413                 }
2414         }
2415 #endif
2416         inp->sctp_associd_counter = 1;
2417         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2418         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2419         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2420         inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable);
2421         /* init the small hash table we use to track asocid <-> tcb */
2422         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2423         if (inp->sctp_asocidhash == NULL) {
2424                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2425                 SCTP_INP_INFO_WUNLOCK();
2426                 return (ENOBUFS);
2427         }
2428 #ifdef IPSEC
2429         {
2430                 struct inpcbpolicy *pcb_sp = NULL;
2431
2432                 error = ipsec_init_policy(so, &pcb_sp);
2433                 /* Arrange to share the policy */
2434                 inp->ip_inp.inp.inp_sp = pcb_sp;
2435                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2436         }
2437         if (error != 0) {
2438                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2439                 SCTP_INP_INFO_WUNLOCK();
2440                 return error;
2441         }
2442 #endif                          /* IPSEC */
2443         SCTP_INCR_EP_COUNT();
2444         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2445         SCTP_INP_INFO_WUNLOCK();
2446
2447         so->so_pcb = (caddr_t)inp;
2448
2449         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2450                 /* UDP style socket */
2451                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2452                     SCTP_PCB_FLAGS_UNBOUND);
2453                 /* Be sure it is NON-BLOCKING IO for UDP */
2454                 /* SCTP_SET_SO_NBIO(so); */
2455         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2456                 /* TCP style socket */
2457                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2458                     SCTP_PCB_FLAGS_UNBOUND);
2459                 /* Be sure we have blocking IO by default */
2460                 SCTP_CLEAR_SO_NBIO(so);
2461         } else {
2462                 /*
2463                  * unsupported socket type (RAW, etc)- in case we missed it
2464                  * in protosw
2465                  */
2466                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2467                 so->so_pcb = NULL;
2468                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2469                 return (EOPNOTSUPP);
2470         }
2471         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2472                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2473                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2474         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2475                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2476                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2477         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2478                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2479                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2480         }
2481         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2482             &inp->sctp_hashmark);
2483         if (inp->sctp_tcbhash == NULL) {
2484                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2485                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2486                 so->so_pcb = NULL;
2487                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2488                 return (ENOBUFS);
2489         }
2490         inp->def_vrf_id = vrf_id;
2491
2492         SCTP_INP_INFO_WLOCK();
2493         SCTP_INP_LOCK_INIT(inp);
2494         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2495         SCTP_INP_READ_INIT(inp);
2496         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2497         /* lock the new ep */
2498         SCTP_INP_WLOCK(inp);
2499
2500         /* add it to the info area */
2501         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2502         SCTP_INP_INFO_WUNLOCK();
2503
2504         TAILQ_INIT(&inp->read_queue);
2505         LIST_INIT(&inp->sctp_addr_list);
2506
2507         LIST_INIT(&inp->sctp_asoc_list);
2508
2509 #ifdef SCTP_TRACK_FREED_ASOCS
2510         /* TEMP CODE */
2511         LIST_INIT(&inp->sctp_asoc_free_list);
2512 #endif
2513         /* Init the timer structure for signature change */
2514         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2515         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2516
2517         /* now init the actual endpoint default data */
2518         m = &inp->sctp_ep;
2519
2520         /* setup the base timeout information */
2521         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2522         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2523         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2524         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2525         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2526         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2527         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2528         /* all max/min max are in ms */
2529         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2530         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2531         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2532         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2533         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2534         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2535         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2536         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2537         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2538         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2539         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2540         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2541         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2542
2543         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2544         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2545         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2546         /* number of streams to pre-open on a association */
2547         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2548
2549         /* Add adaptation cookie */
2550         m->adaptation_layer_indicator = 0;
2551         m->adaptation_layer_indicator_provided = 0;
2552
2553         /* seed random number generator */
2554         m->random_counter = 1;
2555         m->store_at = SCTP_SIGNATURE_SIZE;
2556         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2557         sctp_fill_random_store(m);
2558
2559         /* Minimum cookie size */
2560         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2561             sizeof(struct sctp_state_cookie);
2562         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2563
2564         /* Setup the initial secret */
2565         (void)SCTP_GETTIME_TIMEVAL(&time);
2566         m->time_of_secret_change = time.tv_sec;
2567
2568         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2569                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2570         }
2571         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2572
2573         /* How long is a cookie good for ? */
2574         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2575         /*
2576          * Initialize authentication parameters
2577          */
2578         m->local_hmacs = sctp_default_supported_hmaclist();
2579         m->local_auth_chunks = sctp_alloc_chunklist();
2580         m->default_dscp = 0;
2581 #ifdef INET6
2582         m->default_flowlabel = 0;
2583 #endif
2584         m->port = 0;            /* encapsulation disabled by default */
2585         sctp_auth_set_default_chunks(m->local_auth_chunks);
2586         LIST_INIT(&m->shared_keys);
2587         /* add default NULL key as key id 0 */
2588         null_key = sctp_alloc_sharedkey();
2589         sctp_insert_sharedkey(&m->shared_keys, null_key);
2590         SCTP_INP_WUNLOCK(inp);
2591 #ifdef SCTP_LOG_CLOSING
2592         sctp_log_closing(inp, NULL, 12);
2593 #endif
2594         return (error);
2595 }
2596
2597
2598 void
2599 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2600     struct sctp_tcb *stcb)
2601 {
2602         struct sctp_nets *net;
2603         uint16_t lport, rport;
2604         struct sctppcbhead *head;
2605         struct sctp_laddr *laddr, *oladdr;
2606
2607         atomic_add_int(&stcb->asoc.refcnt, 1);
2608         SCTP_TCB_UNLOCK(stcb);
2609         SCTP_INP_INFO_WLOCK();
2610         SCTP_INP_WLOCK(old_inp);
2611         SCTP_INP_WLOCK(new_inp);
2612         SCTP_TCB_LOCK(stcb);
2613         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2614
2615         new_inp->sctp_ep.time_of_secret_change =
2616             old_inp->sctp_ep.time_of_secret_change;
2617         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2618             sizeof(old_inp->sctp_ep.secret_key));
2619         new_inp->sctp_ep.current_secret_number =
2620             old_inp->sctp_ep.current_secret_number;
2621         new_inp->sctp_ep.last_secret_number =
2622             old_inp->sctp_ep.last_secret_number;
2623         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2624
2625         /* make it so new data pours into the new socket */
2626         stcb->sctp_socket = new_inp->sctp_socket;
2627         stcb->sctp_ep = new_inp;
2628
2629         /* Copy the port across */
2630         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2631         rport = stcb->rport;
2632         /* Pull the tcb from the old association */
2633         LIST_REMOVE(stcb, sctp_tcbhash);
2634         LIST_REMOVE(stcb, sctp_tcblist);
2635         if (stcb->asoc.in_asocid_hash) {
2636                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2637         }
2638         /* Now insert the new_inp into the TCP connected hash */
2639         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2640
2641         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2642         /* Its safe to access */
2643         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2644
2645         /* Now move the tcb into the endpoint list */
2646         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2647         /*
2648          * Question, do we even need to worry about the ep-hash since we
2649          * only have one connection? Probably not :> so lets get rid of it
2650          * and not suck up any kernel memory in that.
2651          */
2652         if (stcb->asoc.in_asocid_hash) {
2653                 struct sctpasochead *lhd;
2654
2655                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2656                     new_inp->hashasocidmark)];
2657                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2658         }
2659         /* Ok. Let's restart timer. */
2660         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2661                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2662                     stcb, net);
2663         }
2664
2665         SCTP_INP_INFO_WUNLOCK();
2666         if (new_inp->sctp_tcbhash != NULL) {
2667                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2668                 new_inp->sctp_tcbhash = NULL;
2669         }
2670         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2671                 /* Subset bound, so copy in the laddr list from the old_inp */
2672                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2673                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2674                         if (laddr == NULL) {
2675                                 /*
2676                                  * Gak, what can we do? This assoc is really
2677                                  * HOSED. We probably should send an abort
2678                                  * here.
2679                                  */
2680                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2681                                 continue;
2682                         }
2683                         SCTP_INCR_LADDR_COUNT();
2684                         bzero(laddr, sizeof(*laddr));
2685                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2686                         laddr->ifa = oladdr->ifa;
2687                         atomic_add_int(&laddr->ifa->refcount, 1);
2688                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2689                             sctp_nxt_addr);
2690                         new_inp->laddr_count++;
2691                         if (oladdr == stcb->asoc.last_used_address) {
2692                                 stcb->asoc.last_used_address = laddr;
2693                         }
2694                 }
2695         }
2696         /*
2697          * Now any running timers need to be adjusted since we really don't
2698          * care if they are running or not just blast in the new_inp into
2699          * all of them.
2700          */
2701
2702         stcb->asoc.dack_timer.ep = (void *)new_inp;
2703         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2704         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2705         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2706         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2707         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2708         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2709         /* now what about the nets? */
2710         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2711                 net->pmtu_timer.ep = (void *)new_inp;
2712                 net->hb_timer.ep = (void *)new_inp;
2713                 net->rxt_timer.ep = (void *)new_inp;
2714         }
2715         SCTP_INP_WUNLOCK(new_inp);
2716         SCTP_INP_WUNLOCK(old_inp);
2717 }
2718
2719
2720
2721
2722 /* sctp_ifap is used to bypass normal local address validation checks */
2723 int
2724 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2725     struct sctp_ifa *sctp_ifap, struct thread *p)
2726 {
2727         /* bind a ep to a socket address */
2728         struct sctppcbhead *head;
2729         struct sctp_inpcb *inp, *inp_tmp;
2730         struct inpcb *ip_inp;
2731         int port_reuse_active = 0;
2732         int bindall;
2733         uint16_t lport;
2734         int error;
2735         uint32_t vrf_id;
2736
2737         lport = 0;
2738         error = 0;
2739         bindall = 1;
2740         inp = (struct sctp_inpcb *)so->so_pcb;
2741         ip_inp = (struct inpcb *)so->so_pcb;
2742 #ifdef SCTP_DEBUG
2743         if (addr) {
2744                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2745                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2746                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2747                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2748         }
2749 #endif
2750         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2751                 /* already did a bind, subsequent binds NOT allowed ! */
2752                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2753                 return (EINVAL);
2754         }
2755 #ifdef INVARIANTS
2756         if (p == NULL)
2757                 panic("null proc/thread");
2758 #endif
2759         if (addr != NULL) {
2760                 switch (addr->sa_family) {
2761 #ifdef INET
2762                 case AF_INET:
2763                         {
2764                                 struct sockaddr_in *sin;
2765
2766                                 /* IPV6_V6ONLY socket? */
2767                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2768                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2769                                         return (EINVAL);
2770                                 }
2771                                 if (addr->sa_len != sizeof(*sin)) {
2772                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2773                                         return (EINVAL);
2774                                 }
2775                                 sin = (struct sockaddr_in *)addr;
2776                                 lport = sin->sin_port;
2777                                 /*
2778                                  * For LOOPBACK the prison_local_ip4() call
2779                                  * will transmute the ip address to the
2780                                  * proper value.
2781                                  */
2782                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2783                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2784                                         return (error);
2785                                 }
2786                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2787                                         bindall = 0;
2788                                 }
2789                                 break;
2790                         }
2791 #endif
2792 #ifdef INET6
2793                 case AF_INET6:
2794                         {
2795                                 /*
2796                                  * Only for pure IPv6 Address. (No IPv4
2797                                  * Mapped!)
2798                                  */
2799                                 struct sockaddr_in6 *sin6;
2800
2801                                 sin6 = (struct sockaddr_in6 *)addr;
2802
2803                                 if (addr->sa_len != sizeof(*sin6)) {
2804                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2805                                         return (EINVAL);
2806                                 }
2807                                 lport = sin6->sin6_port;
2808                                 /*
2809                                  * For LOOPBACK the prison_local_ip6() call
2810                                  * will transmute the ipv6 address to the
2811                                  * proper value.
2812                                  */
2813                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2814                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2815                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2816                                         return (error);
2817                                 }
2818                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2819                                         bindall = 0;
2820                                         /* KAME hack: embed scopeid */
2821                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2822                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2823                                                 return (EINVAL);
2824                                         }
2825                                 }
2826                                 /* this must be cleared for ifa_ifwithaddr() */
2827                                 sin6->sin6_scope_id = 0;
2828                                 break;
2829                         }
2830 #endif
2831                 default:
2832                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2833                         return (EAFNOSUPPORT);
2834                 }
2835         }
2836         SCTP_INP_INFO_WLOCK();
2837         SCTP_INP_WLOCK(inp);
2838         /* Setup a vrf_id to be the default for the non-bind-all case. */
2839         vrf_id = inp->def_vrf_id;
2840
2841         /* increase our count due to the unlock we do */
2842         SCTP_INP_INCR_REF(inp);
2843         if (lport) {
2844                 /*
2845                  * Did the caller specify a port? if so we must see if an ep
2846                  * already has this one bound.
2847                  */
2848                 /* got to be root to get at low ports */
2849                 if (ntohs(lport) < IPPORT_RESERVED) {
2850                         if (p && (error =
2851                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2852                             )) {
2853                                 SCTP_INP_DECR_REF(inp);
2854                                 SCTP_INP_WUNLOCK(inp);
2855                                 SCTP_INP_INFO_WUNLOCK();
2856                                 return (error);
2857                         }
2858                 }
2859                 if (p == NULL) {
2860                         SCTP_INP_DECR_REF(inp);
2861                         SCTP_INP_WUNLOCK(inp);
2862                         SCTP_INP_INFO_WUNLOCK();
2863                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2864                         return (error);
2865                 }
2866                 SCTP_INP_WUNLOCK(inp);
2867                 if (bindall) {
2868                         vrf_id = inp->def_vrf_id;
2869                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2870                         if (inp_tmp != NULL) {
2871                                 /*
2872                                  * lock guy returned and lower count note
2873                                  * that we are not bound so inp_tmp should
2874                                  * NEVER be inp. And it is this inp
2875                                  * (inp_tmp) that gets the reference bump,
2876                                  * so we must lower it.
2877                                  */
2878                                 SCTP_INP_DECR_REF(inp_tmp);
2879                                 /* unlock info */
2880                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2881                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2882                                         /*
2883                                          * Ok, must be one-2-one and
2884                                          * allowing port re-use
2885                                          */
2886                                         port_reuse_active = 1;
2887                                         goto continue_anyway;
2888                                 }
2889                                 SCTP_INP_DECR_REF(inp);
2890                                 SCTP_INP_INFO_WUNLOCK();
2891                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2892                                 return (EADDRINUSE);
2893                         }
2894                 } else {
2895                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2896                         if (inp_tmp != NULL) {
2897                                 /*
2898                                  * lock guy returned and lower count note
2899                                  * that we are not bound so inp_tmp should
2900                                  * NEVER be inp. And it is this inp
2901                                  * (inp_tmp) that gets the reference bump,
2902                                  * so we must lower it.
2903                                  */
2904                                 SCTP_INP_DECR_REF(inp_tmp);
2905                                 /* unlock info */
2906                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2907                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2908                                         /*
2909                                          * Ok, must be one-2-one and
2910                                          * allowing port re-use
2911                                          */
2912                                         port_reuse_active = 1;
2913                                         goto continue_anyway;
2914                                 }
2915                                 SCTP_INP_DECR_REF(inp);
2916                                 SCTP_INP_INFO_WUNLOCK();
2917                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2918                                 return (EADDRINUSE);
2919                         }
2920                 }
2921 continue_anyway:
2922                 SCTP_INP_WLOCK(inp);
2923                 if (bindall) {
2924                         /* verify that no lport is not used by a singleton */
2925                         if ((port_reuse_active == 0) &&
2926                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
2927                                 /* Sorry someone already has this one bound */
2928                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2929                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2930                                         port_reuse_active = 1;
2931                                 } else {
2932                                         SCTP_INP_DECR_REF(inp);
2933                                         SCTP_INP_WUNLOCK(inp);
2934                                         SCTP_INP_INFO_WUNLOCK();
2935                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2936                                         return (EADDRINUSE);
2937                                 }
2938                         }
2939                 }
2940         } else {
2941                 uint16_t first, last, candidate;
2942                 uint16_t count;
2943                 int done;
2944
2945                 if (ip_inp->inp_flags & INP_HIGHPORT) {
2946                         first = MODULE_GLOBAL(ipport_hifirstauto);
2947                         last = MODULE_GLOBAL(ipport_hilastauto);
2948                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2949                         if (p && (error =
2950                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2951                             )) {
2952                                 SCTP_INP_DECR_REF(inp);
2953                                 SCTP_INP_WUNLOCK(inp);
2954                                 SCTP_INP_INFO_WUNLOCK();
2955                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2956                                 return (error);
2957                         }
2958                         first = MODULE_GLOBAL(ipport_lowfirstauto);
2959                         last = MODULE_GLOBAL(ipport_lowlastauto);
2960                 } else {
2961                         first = MODULE_GLOBAL(ipport_firstauto);
2962                         last = MODULE_GLOBAL(ipport_lastauto);
2963                 }
2964                 if (first > last) {
2965                         uint16_t temp;
2966
2967                         temp = first;
2968                         first = last;
2969                         last = temp;
2970                 }
2971                 count = last - first + 1;       /* number of candidates */
2972                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2973
2974                 done = 0;
2975                 while (!done) {
2976                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
2977                                 done = 1;
2978                         }
2979                         if (!done) {
2980                                 if (--count == 0) {
2981                                         SCTP_INP_DECR_REF(inp);
2982                                         SCTP_INP_WUNLOCK(inp);
2983                                         SCTP_INP_INFO_WUNLOCK();
2984                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2985                                         return (EADDRINUSE);
2986                                 }
2987                                 if (candidate == last)
2988                                         candidate = first;
2989                                 else
2990                                         candidate = candidate + 1;
2991                         }
2992                 }
2993                 lport = htons(candidate);
2994         }
2995         SCTP_INP_DECR_REF(inp);
2996         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2997             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2998                 /*
2999                  * this really should not happen. The guy did a non-blocking
3000                  * bind and then did a close at the same time.
3001                  */
3002                 SCTP_INP_WUNLOCK(inp);
3003                 SCTP_INP_INFO_WUNLOCK();
3004                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3005                 return (EINVAL);
3006         }
3007         /* ok we look clear to give out this port, so lets setup the binding */
3008         if (bindall) {
3009                 /* binding to all addresses, so just set in the proper flags */
3010                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3011                 /* set the automatic addr changes from kernel flag */
3012                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3013                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3014                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3015                 } else {
3016                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3017                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3018                 }
3019                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3020                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3021                 } else {
3022                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3023                 }
3024                 /*
3025                  * set the automatic mobility_base from kernel flag (by
3026                  * micchie)
3027                  */
3028                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3029                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3030                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3031                 } else {
3032                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3033                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3034                 }
3035                 /*
3036                  * set the automatic mobility_fasthandoff from kernel flag
3037                  * (by micchie)
3038                  */
3039                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3040                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3041                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3042                 } else {
3043                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3044                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3045                 }
3046         } else {
3047                 /*
3048                  * bind specific, make sure flags is off and add a new
3049                  * address structure to the sctp_addr_list inside the ep
3050                  * structure.
3051                  *
3052                  * We will need to allocate one and insert it at the head. The
3053                  * socketopt call can just insert new addresses in there as
3054                  * well. It will also have to do the embed scope kame hack
3055                  * too (before adding).
3056                  */
3057                 struct sctp_ifa *ifa;
3058                 struct sockaddr_storage store_sa;
3059
3060                 memset(&store_sa, 0, sizeof(store_sa));
3061                 switch (addr->sa_family) {
3062 #ifdef INET
3063                 case AF_INET:
3064                         {
3065                                 struct sockaddr_in *sin;
3066
3067                                 sin = (struct sockaddr_in *)&store_sa;
3068                                 memcpy(sin, addr, sizeof(struct sockaddr_in));
3069                                 sin->sin_port = 0;
3070                                 break;
3071                         }
3072 #endif
3073 #ifdef INET6
3074                 case AF_INET6:
3075                         {
3076                                 struct sockaddr_in6 *sin6;
3077
3078                                 sin6 = (struct sockaddr_in6 *)&store_sa;
3079                                 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3080                                 sin6->sin6_port = 0;
3081                                 break;
3082                         }
3083 #endif
3084                 default:
3085                         break;
3086                 }
3087                 /*
3088                  * first find the interface with the bound address need to
3089                  * zero out the port to find the address! yuck! can't do
3090                  * this earlier since need port for sctp_pcb_findep()
3091                  */
3092                 if (sctp_ifap != NULL) {
3093                         ifa = sctp_ifap;
3094                 } else {
3095                         /*
3096                          * Note for BSD we hit here always other O/S's will
3097                          * pass things in via the sctp_ifap argument
3098                          * (Panda).
3099                          */
3100                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3101                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3102                 }
3103                 if (ifa == NULL) {
3104                         /* Can't find an interface with that address */
3105                         SCTP_INP_WUNLOCK(inp);
3106                         SCTP_INP_INFO_WUNLOCK();
3107                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3108                         return (EADDRNOTAVAIL);
3109                 }
3110 #ifdef INET6
3111                 if (addr->sa_family == AF_INET6) {
3112                         /* GAK, more FIXME IFA lock? */
3113                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3114                                 /* Can't bind a non-existent addr. */
3115                                 SCTP_INP_WUNLOCK(inp);
3116                                 SCTP_INP_INFO_WUNLOCK();
3117                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3118                                 return (EINVAL);
3119                         }
3120                 }
3121 #endif
3122                 /* we're not bound all */
3123                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3124                 /* allow bindx() to send ASCONF's for binding changes */
3125                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3126                 /* clear automatic addr changes from kernel flag */
3127                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3128
3129                 /* add this address to the endpoint list */
3130                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3131                 if (error != 0) {
3132                         SCTP_INP_WUNLOCK(inp);
3133                         SCTP_INP_INFO_WUNLOCK();
3134                         return (error);
3135                 }
3136                 inp->laddr_count++;
3137         }
3138         /* find the bucket */
3139         if (port_reuse_active) {
3140                 /* Put it into tcp 1-2-1 hash */
3141                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3142                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3143         } else {
3144                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3145         }
3146         /* put it in the bucket */
3147         LIST_INSERT_HEAD(head, inp, sctp_hash);
3148         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3149             (void *)head, ntohs(lport), port_reuse_active);
3150         /* set in the port */
3151         inp->sctp_lport = lport;
3152
3153         /* turn off just the unbound flag */
3154         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3155         SCTP_INP_WUNLOCK(inp);
3156         SCTP_INP_INFO_WUNLOCK();
3157         return (0);
3158 }
3159
3160
3161 static void
3162 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3163 {
3164         struct sctp_iterator *it, *nit;
3165
3166         /*
3167          * We enter with the only the ITERATOR_LOCK in place and a write
3168          * lock on the inp_info stuff.
3169          */
3170         it = sctp_it_ctl.cur_it;
3171         if (it && (it->vn != curvnet)) {
3172                 /* Its not looking at our VNET */
3173                 return;
3174         }
3175         if (it && (it->inp == inp)) {
3176                 /*
3177                  * This is tricky and we hold the iterator lock, but when it
3178                  * returns and gets the lock (when we release it) the
3179                  * iterator will try to operate on inp. We need to stop that
3180                  * from happening. But of course the iterator has a
3181                  * reference on the stcb and inp. We can mark it and it will
3182                  * stop.
3183                  *
3184                  * If its a single iterator situation, we set the end iterator
3185                  * flag. Otherwise we set the iterator to go to the next
3186                  * inp.
3187                  *
3188                  */
3189                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3190                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3191                 } else {
3192                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3193                 }
3194         }
3195         /*
3196          * Now go through and remove any single reference to our inp that
3197          * may be still pending on the list
3198          */
3199         SCTP_IPI_ITERATOR_WQ_LOCK();
3200         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3201                 if (it->vn != curvnet) {
3202                         continue;
3203                 }
3204                 if (it->inp == inp) {
3205                         /* This one points to me is it inp specific? */
3206                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3207                                 /* Remove and free this one */
3208                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3209                                     it, sctp_nxt_itr);
3210                                 if (it->function_atend != NULL) {
3211                                         (*it->function_atend) (it->pointer, it->val);
3212                                 }
3213                                 SCTP_FREE(it, SCTP_M_ITER);
3214                         } else {
3215                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3216                                 if (it->inp) {
3217                                         SCTP_INP_INCR_REF(it->inp);
3218                                 }
3219                         }
3220                         /*
3221                          * When its put in the refcnt is incremented so decr
3222                          * it
3223                          */
3224                         SCTP_INP_DECR_REF(inp);
3225                 }
3226         }
3227         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3228 }
3229
3230 /* release sctp_inpcb unbind the port */
3231 void
3232 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3233 {
3234         /*
3235          * Here we free a endpoint. We must find it (if it is in the Hash
3236          * table) and remove it from there. Then we must also find it in the
3237          * overall list and remove it from there. After all removals are
3238          * complete then any timer has to be stopped. Then start the actual
3239          * freeing. a) Any local lists. b) Any associations. c) The hash of
3240          * all associations. d) finally the ep itself.
3241          */
3242         struct sctp_tcb *asoc, *nasoc;
3243         struct sctp_laddr *laddr, *nladdr;
3244         struct inpcb *ip_pcb;
3245         struct socket *so;
3246         int being_refed = 0;
3247         struct sctp_queued_to_read *sq, *nsq;
3248         int cnt;
3249         sctp_sharedkey_t *shared_key, *nshared_key;
3250
3251
3252 #ifdef SCTP_LOG_CLOSING
3253         sctp_log_closing(inp, NULL, 0);
3254 #endif
3255         SCTP_ITERATOR_LOCK();
3256         /* mark any iterators on the list or being processed */
3257         sctp_iterator_inp_being_freed(inp);
3258         SCTP_ITERATOR_UNLOCK();
3259         so = inp->sctp_socket;
3260         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3261                 /* been here before.. eeks.. get out of here */
3262                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3263 #ifdef SCTP_LOG_CLOSING
3264                 sctp_log_closing(inp, NULL, 1);
3265 #endif
3266                 return;
3267         }
3268         SCTP_ASOC_CREATE_LOCK(inp);
3269         SCTP_INP_INFO_WLOCK();
3270
3271         SCTP_INP_WLOCK(inp);
3272         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3273                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3274                 /* socket is gone, so no more wakeups allowed */
3275                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3276                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3277                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3278
3279         }
3280         /* First time through we have the socket lock, after that no more. */
3281         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3282             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3283
3284         if (inp->control) {
3285                 sctp_m_freem(inp->control);
3286                 inp->control = NULL;
3287         }
3288         if (inp->pkt) {
3289                 sctp_m_freem(inp->pkt);
3290                 inp->pkt = NULL;
3291         }
3292         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3293                                          * here but I will be nice :> (i.e.
3294                                          * ip_pcb = ep;) */
3295         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3296                 int cnt_in_sd;
3297
3298                 cnt_in_sd = 0;
3299                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3300                         SCTP_TCB_LOCK(asoc);
3301                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3302                                 /* Skip guys being freed */
3303                                 cnt_in_sd++;
3304                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3305                                         /*
3306                                          * Special case - we did not start a
3307                                          * kill timer on the asoc due to it
3308                                          * was not closed. So go ahead and
3309                                          * start it now.
3310                                          */
3311                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3312                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3313                                 }
3314                                 SCTP_TCB_UNLOCK(asoc);
3315                                 continue;
3316                         }
3317                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3318                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3319                             (asoc->asoc.total_output_queue_size == 0)) {
3320                                 /*
3321                                  * If we have data in queue, we don't want
3322                                  * to just free since the app may have done,
3323                                  * send()/close or connect/send/close. And
3324                                  * it wants the data to get across first.
3325                                  */
3326                                 /* Just abandon things in the front states */
3327                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3328                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3329                                         cnt_in_sd++;
3330                                 }
3331                                 continue;
3332                         }
3333                         /* Disconnect the socket please */
3334                         asoc->sctp_socket = NULL;
3335                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3336                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3337                             (asoc->asoc.control_pdapi) ||
3338                             (asoc->asoc.size_on_all_streams > 0) ||
3339                             (so && (so->so_rcv.sb_cc > 0))) {
3340                                 /* Left with Data unread */
3341                                 struct mbuf *op_err;
3342
3343                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3344                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3345                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3346                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3347                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3348                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3349                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3350                                 }
3351                                 if (sctp_free_assoc(inp, asoc,
3352                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3353                                         cnt_in_sd++;
3354                                 }
3355                                 continue;
3356                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3357                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3358                             (asoc->asoc.stream_queue_cnt == 0)) {
3359                                 if (asoc->asoc.locked_on_sending) {
3360                                         goto abort_anyway;
3361                                 }
3362                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3363                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3364                                         struct sctp_nets *netp;
3365
3366                                         /*
3367                                          * there is nothing queued to send,
3368                                          * so I send shutdown
3369                                          */
3370                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3371                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3372                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3373                                         }
3374                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3375                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3376                                         sctp_stop_timers_for_shutdown(asoc);
3377                                         if (asoc->asoc.alternate) {
3378                                                 netp = asoc->asoc.alternate;
3379                                         } else {
3380                                                 netp = asoc->asoc.primary_destination;
3381                                         }
3382                                         sctp_send_shutdown(asoc, netp);
3383                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3384                                             netp);
3385                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3386                                             asoc->asoc.primary_destination);
3387                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3388                                 }
3389                         } else {
3390                                 /* mark into shutdown pending */
3391                                 struct sctp_stream_queue_pending *sp;
3392
3393                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3394                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3395                                     asoc->asoc.primary_destination);
3396                                 if (asoc->asoc.locked_on_sending) {
3397                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3398                                             sctp_streamhead);
3399                                         if (sp == NULL) {
3400                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3401                                                     (void *)asoc->asoc.locked_on_sending,
3402                                                     asoc->asoc.locked_on_sending->stream_no);
3403                                         } else {
3404                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3405                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3406                                         }
3407                                 }
3408                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3409                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3410                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3411                                         struct mbuf *op_err;
3412
3413                         abort_anyway:
3414                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3415                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3416                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3417                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3418                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3419                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3420                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3421                                         }
3422                                         if (sctp_free_assoc(inp, asoc,
3423                                             SCTP_PCBFREE_NOFORCE,
3424                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3425                                                 cnt_in_sd++;
3426                                         }
3427                                         continue;
3428                                 } else {
3429                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3430                                 }
3431                         }
3432                         cnt_in_sd++;
3433                         SCTP_TCB_UNLOCK(asoc);
3434                 }
3435                 /* now is there some left in our SHUTDOWN state? */
3436                 if (cnt_in_sd) {
3437 #ifdef SCTP_LOG_CLOSING
3438                         sctp_log_closing(inp, NULL, 2);
3439 #endif
3440                         inp->sctp_socket = NULL;
3441                         SCTP_INP_WUNLOCK(inp);
3442                         SCTP_ASOC_CREATE_UNLOCK(inp);
3443                         SCTP_INP_INFO_WUNLOCK();
3444                         return;
3445                 }
3446         }
3447         inp->sctp_socket = NULL;
3448         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3449             SCTP_PCB_FLAGS_UNBOUND) {
3450                 /*
3451                  * ok, this guy has been bound. It's port is somewhere in
3452                  * the SCTP_BASE_INFO(hash table). Remove it!
3453                  */
3454                 LIST_REMOVE(inp, sctp_hash);
3455                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3456         }
3457         /*
3458          * If there is a timer running to kill us, forget it, since it may
3459          * have a contest on the INP lock.. which would cause us to die ...
3460          */
3461         cnt = 0;
3462         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3463                 SCTP_TCB_LOCK(asoc);
3464                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3465                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3466                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3467                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3468                         }
3469                         cnt++;
3470                         SCTP_TCB_UNLOCK(asoc);
3471                         continue;
3472                 }
3473                 /* Free associations that are NOT killing us */
3474                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3475                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3476                         struct mbuf *op_err;
3477
3478                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3479                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3480                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3481                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3482                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3483                         cnt++;
3484                         SCTP_TCB_UNLOCK(asoc);
3485                         continue;
3486                 }
3487                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3488                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3489                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3490                 }
3491                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3492                         cnt++;
3493                 }
3494         }
3495         if (cnt) {
3496                 /* Ok we have someone out there that will kill us */
3497                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3498 #ifdef SCTP_LOG_CLOSING
3499                 sctp_log_closing(inp, NULL, 3);
3500 #endif
3501                 SCTP_INP_WUNLOCK(inp);
3502                 SCTP_ASOC_CREATE_UNLOCK(inp);
3503                 SCTP_INP_INFO_WUNLOCK();
3504                 return;
3505         }
3506         if (SCTP_INP_LOCK_CONTENDED(inp))
3507                 being_refed++;
3508         if (SCTP_INP_READ_CONTENDED(inp))
3509                 being_refed++;
3510         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3511                 being_refed++;
3512
3513         if ((inp->refcount) ||
3514             (being_refed) ||
3515             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3516                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3517 #ifdef SCTP_LOG_CLOSING
3518                 sctp_log_closing(inp, NULL, 4);
3519 #endif
3520                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3521                 SCTP_INP_WUNLOCK(inp);
3522                 SCTP_ASOC_CREATE_UNLOCK(inp);
3523                 SCTP_INP_INFO_WUNLOCK();
3524                 return;
3525         }
3526         inp->sctp_ep.signature_change.type = 0;
3527         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3528         /*
3529          * Remove it from the list .. last thing we need a lock for.
3530          */
3531         LIST_REMOVE(inp, sctp_list);
3532         SCTP_INP_WUNLOCK(inp);
3533         SCTP_ASOC_CREATE_UNLOCK(inp);
3534         SCTP_INP_INFO_WUNLOCK();
3535         /*
3536          * Now we release all locks. Since this INP cannot be found anymore
3537          * except possibly by the kill timer that might be running. We call
3538          * the drain function here. It should hit the case were it sees the
3539          * ACTIVE flag cleared and exit out freeing us to proceed and
3540          * destroy everything.
3541          */
3542         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3543                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3544         } else {
3545                 /* Probably un-needed */
3546                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3547         }
3548
3549 #ifdef SCTP_LOG_CLOSING
3550         sctp_log_closing(inp, NULL, 5);
3551 #endif
3552
3553
3554         if ((inp->sctp_asocidhash) != NULL) {
3555                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3556                 inp->sctp_asocidhash = NULL;
3557         }
3558         /* sa_ignore FREED_MEMORY */
3559         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3560                 /* Its only abandoned if it had data left */
3561                 if (sq->length)
3562                         SCTP_STAT_INCR(sctps_left_abandon);
3563
3564                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3565                 sctp_free_remote_addr(sq->whoFrom);
3566                 if (so)
3567                         so->so_rcv.sb_cc -= sq->length;
3568                 if (sq->data) {
3569                         sctp_m_freem(sq->data);
3570                         sq->data = NULL;
3571                 }
3572                 /*
3573                  * no need to free the net count, since at this point all
3574                  * assoc's are gone.
3575                  */
3576                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3577                 SCTP_DECR_READQ_COUNT();
3578         }
3579         /* Now the sctp_pcb things */
3580         /*
3581          * free each asoc if it is not already closed/free. we can't use the
3582          * macro here since le_next will get freed as part of the
3583          * sctp_free_assoc() call.
3584          */
3585         if (so) {
3586 #ifdef IPSEC
3587                 ipsec_delete_pcbpolicy(ip_pcb);
3588 #endif                          /* IPSEC */
3589
3590                 /* Unlocks not needed since the socket is gone now */
3591         }
3592         if (ip_pcb->inp_options) {
3593                 (void)sctp_m_free(ip_pcb->inp_options);
3594                 ip_pcb->inp_options = 0;
3595         }
3596 #ifdef INET6
3597         if (ip_pcb->inp_vflag & INP_IPV6) {
3598                 struct in6pcb *in6p;
3599
3600                 in6p = (struct in6pcb *)inp;
3601                 ip6_freepcbopts(in6p->in6p_outputopts);
3602         }
3603 #endif                          /* INET6 */
3604         ip_pcb->inp_vflag = 0;
3605         /* free up authentication fields */
3606         if (inp->sctp_ep.local_auth_chunks != NULL)
3607                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3608         if (inp->sctp_ep.local_hmacs != NULL)
3609                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3610
3611         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3612                 LIST_REMOVE(shared_key, next);
3613                 sctp_free_sharedkey(shared_key);
3614                 /* sa_ignore FREED_MEMORY */
3615         }
3616
3617         /*
3618          * if we have an address list the following will free the list of
3619          * ifaddr's that are set into this ep. Again macro limitations here,
3620          * since the LIST_FOREACH could be a bad idea.
3621          */
3622         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3623                 sctp_remove_laddr(laddr);
3624         }
3625
3626 #ifdef SCTP_TRACK_FREED_ASOCS
3627         /* TEMP CODE */
3628         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3629                 LIST_REMOVE(asoc, sctp_tcblist);
3630                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3631                 SCTP_DECR_ASOC_COUNT();
3632         }
3633         /* *** END TEMP CODE *** */
3634 #endif
3635         /* Now lets see about freeing the EP hash table. */
3636         if (inp->sctp_tcbhash != NULL) {
3637                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3638                 inp->sctp_tcbhash = NULL;
3639         }
3640         /* Now we must put the ep memory back into the zone pool */
3641         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3642         SCTP_INP_LOCK_DESTROY(inp);
3643         SCTP_INP_READ_DESTROY(inp);
3644         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3645         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3646         SCTP_DECR_EP_COUNT();
3647 }
3648
3649
3650 struct sctp_nets *
3651 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3652 {
3653         struct sctp_nets *net;
3654
3655         /* locate the address */
3656         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3657                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3658                         return (net);
3659         }
3660         return (NULL);
3661 }
3662
3663
3664 int
3665 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3666 {
3667         struct sctp_ifa *sctp_ifa;
3668
3669         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3670         if (sctp_ifa) {
3671                 return (1);
3672         } else {
3673                 return (0);
3674         }
3675 }
3676
3677 /*
3678  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3679  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3680  * stats of stuff.
3681  */
3682 int
3683 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3684     struct sctp_nets **netp, int set_scope, int from)
3685 {
3686         /*
3687          * The following is redundant to the same lines in the
3688          * sctp_aloc_assoc() but is needed since others call the add address
3689          * function
3690          */
3691         struct sctp_nets *net, *netfirst;
3692         int addr_inscope;
3693
3694         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3695             from);
3696         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3697
3698         netfirst = sctp_findnet(stcb, newaddr);
3699         if (netfirst) {
3700                 /*
3701                  * Lie and return ok, we don't want to make the association
3702                  * go away for this behavior. It will happen in the TCP
3703                  * model in a connected socket. It does not reach the hash
3704                  * table until after the association is built so it can't be
3705                  * found. Mark as reachable, since the initial creation will
3706                  * have been cleared and the NOT_IN_ASSOC flag will have
3707                  * been added... and we don't want to end up removing it
3708                  * back out.
3709                  */
3710                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3711                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3712                             SCTP_ADDR_UNCONFIRMED);
3713                 } else {
3714                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3715                 }
3716
3717                 return (0);
3718         }
3719         addr_inscope = 1;
3720         switch (newaddr->sa_family) {
3721 #ifdef INET
3722         case AF_INET:
3723                 {
3724                         struct sockaddr_in *sin;
3725
3726                         sin = (struct sockaddr_in *)newaddr;
3727                         if (sin->sin_addr.s_addr == 0) {
3728                                 /* Invalid address */
3729                                 return (-1);
3730                         }
3731                         /* zero out the bzero area */
3732                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3733
3734                         /* assure len is set */
3735                         sin->sin_len = sizeof(struct sockaddr_in);
3736                         if (set_scope) {
3737 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3738                                 stcb->asoc.scope.ipv4_local_scope = 1;
3739 #else
3740                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3741                                         stcb->asoc.scope.ipv4_local_scope = 1;
3742                                 }
3743 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3744                         } else {
3745                                 /* Validate the address is in scope */
3746                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3747                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3748                                         addr_inscope = 0;
3749                                 }
3750                         }
3751                         break;
3752                 }
3753 #endif
3754 #ifdef INET6
3755         case AF_INET6:
3756                 {
3757                         struct sockaddr_in6 *sin6;
3758
3759                         sin6 = (struct sockaddr_in6 *)newaddr;
3760                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3761                                 /* Invalid address */
3762                                 return (-1);
3763                         }
3764                         /* assure len is set */
3765                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3766                         if (set_scope) {
3767                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3768                                         stcb->asoc.scope.loopback_scope = 1;
3769                                         stcb->asoc.scope.local_scope = 0;
3770                                         stcb->asoc.scope.ipv4_local_scope = 1;
3771                                         stcb->asoc.scope.site_scope = 1;
3772                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3773                                         /*
3774                                          * If the new destination is a
3775                                          * LINK_LOCAL we must have common
3776                                          * site scope. Don't set the local
3777                                          * scope since we may not share all
3778                                          * links, only loopback can do this.
3779                                          * Links on the local network would
3780                                          * also be on our private network
3781                                          * for v4 too.
3782                                          */
3783                                         stcb->asoc.scope.ipv4_local_scope = 1;
3784                                         stcb->asoc.scope.site_scope = 1;
3785                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3786                                         /*
3787                                          * If the new destination is
3788                                          * SITE_LOCAL then we must have site
3789                                          * scope in common.
3790                                          */
3791                                         stcb->asoc.scope.site_scope = 1;
3792                                 }
3793                         } else {
3794                                 /* Validate the address is in scope */
3795                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3796                                     (stcb->asoc.scope.loopback_scope == 0)) {
3797                                         addr_inscope = 0;
3798                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3799                                     (stcb->asoc.scope.local_scope == 0)) {
3800                                         addr_inscope = 0;
3801                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3802                                     (stcb->asoc.scope.site_scope == 0)) {
3803                                         addr_inscope = 0;
3804                                 }
3805                         }
3806                         break;
3807                 }
3808 #endif
3809         default:
3810                 /* not supported family type */
3811                 return (-1);
3812         }
3813         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3814         if (net == NULL) {
3815                 return (-1);
3816         }
3817         SCTP_INCR_RADDR_COUNT();
3818         bzero(net, sizeof(struct sctp_nets));
3819         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3820         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3821         switch (newaddr->sa_family) {
3822 #ifdef INET
3823         case AF_INET:
3824                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3825                 break;
3826 #endif
3827 #ifdef INET6
3828         case AF_INET6:
3829                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3830                 break;
3831 #endif
3832         default:
3833                 break;
3834         }
3835         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3836         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3837                 stcb->asoc.scope.loopback_scope = 1;
3838                 stcb->asoc.scope.ipv4_local_scope = 1;
3839                 stcb->asoc.scope.local_scope = 0;
3840                 stcb->asoc.scope.site_scope = 1;
3841                 addr_inscope = 1;
3842         }
3843         net->failure_threshold = stcb->asoc.def_net_failure;
3844         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3845         if (addr_inscope == 0) {
3846                 net->dest_state = (SCTP_ADDR_REACHABLE |
3847                     SCTP_ADDR_OUT_OF_SCOPE);
3848         } else {
3849                 if (from == SCTP_ADDR_IS_CONFIRMED)
3850                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3851                         net->dest_state = SCTP_ADDR_REACHABLE;
3852                 else
3853                         net->dest_state = SCTP_ADDR_REACHABLE |
3854                             SCTP_ADDR_UNCONFIRMED;
3855         }
3856         /*
3857          * We set this to 0, the timer code knows that this means its an
3858          * initial value
3859          */
3860         net->rto_needed = 1;
3861         net->RTO = 0;
3862         net->RTO_measured = 0;
3863         stcb->asoc.numnets++;
3864         net->ref_count = 1;
3865         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3866         net->port = stcb->asoc.port;
3867         net->dscp = stcb->asoc.default_dscp;
3868 #ifdef INET6
3869         net->flowlabel = stcb->asoc.default_flowlabel;
3870 #endif
3871         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3872                 net->dest_state |= SCTP_ADDR_NOHB;
3873         } else {
3874                 net->dest_state &= ~SCTP_ADDR_NOHB;
3875         }
3876         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3877                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3878         } else {
3879                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3880         }
3881         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3882         /* Init the timer structure */
3883         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3884         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3885         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3886
3887         /* Now generate a route for this guy */
3888 #ifdef INET6
3889         /* KAME hack: embed scopeid */
3890         if (newaddr->sa_family == AF_INET6) {
3891                 struct sockaddr_in6 *sin6;
3892
3893                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3894                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3895                 sin6->sin6_scope_id = 0;
3896         }
3897 #endif
3898         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3899
3900         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3901                 /* Get source address */
3902                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3903                     stcb,
3904                     (sctp_route_t *) & net->ro,
3905                     net,
3906                     0,
3907                     stcb->asoc.vrf_id);
3908                 /* Now get the interface MTU */
3909                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3910                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3911                 }
3912                 if (net->mtu > 0) {
3913                         uint32_t rmtu;
3914
3915                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3916                         if (rmtu == 0) {
3917                                 /*
3918                                  * Start things off to match mtu of
3919                                  * interface please.
3920                                  */
3921                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3922                                     net->ro.ro_rt, net->mtu);
3923                         } else {
3924                                 /*
3925                                  * we take the route mtu over the interface,
3926                                  * since the route may be leading out the
3927                                  * loopback, or a different interface.
3928                                  */
3929                                 net->mtu = rmtu;
3930                         }
3931                 }
3932         }
3933         if (net->mtu == 0) {
3934                 switch (newaddr->sa_family) {
3935 #ifdef INET
3936                 case AF_INET:
3937                         net->mtu = SCTP_DEFAULT_MTU;
3938                         break;
3939 #endif
3940 #ifdef INET6
3941                 case AF_INET6:
3942                         net->mtu = 1280;
3943                         break;
3944 #endif
3945                 default:
3946                         break;
3947                 }
3948         }
3949         if (net->port) {
3950                 net->mtu -= (uint32_t) sizeof(struct udphdr);
3951         }
3952         if (from == SCTP_ALLOC_ASOC) {
3953                 stcb->asoc.smallest_mtu = net->mtu;
3954         }
3955         if (stcb->asoc.smallest_mtu > net->mtu) {
3956                 stcb->asoc.smallest_mtu = net->mtu;
3957         }
3958 #ifdef INET6
3959         if (newaddr->sa_family == AF_INET6) {
3960                 struct sockaddr_in6 *sin6;
3961
3962                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3963                 (void)sa6_recoverscope(sin6);
3964         }
3965 #endif
3966
3967         /* JRS - Use the congestion control given in the CC module */
3968         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
3969                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
3970
3971         /*
3972          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3973          * of assoc (2005/06/27, iyengar@cis.udel.edu)
3974          */
3975         net->find_pseudo_cumack = 1;
3976         net->find_rtx_pseudo_cumack = 1;
3977         net->src_addr_selected = 0;
3978         /* Choose an initial flowid. */
3979         net->flowid = stcb->asoc.my_vtag ^
3980             ntohs(stcb->rport) ^
3981             ntohs(stcb->sctp_ep->sctp_lport);
3982 #ifdef INVARIANTS
3983         net->flowidset = 1;
3984 #endif
3985         if (netp) {
3986                 *netp = net;
3987         }
3988         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3989         if (net->ro.ro_rt == NULL) {
3990                 /* Since we have no route put it at the back */
3991                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3992         } else if (netfirst == NULL) {
3993                 /* We are the first one in the pool. */
3994                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3995         } else if (netfirst->ro.ro_rt == NULL) {
3996                 /*
3997                  * First one has NO route. Place this one ahead of the first
3998                  * one.
3999                  */
4000                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4001         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4002                 /*
4003                  * This one has a different interface than the one at the
4004                  * top of the list. Place it ahead.
4005                  */
4006                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4007         } else {
4008                 /*
4009                  * Ok we have the same interface as the first one. Move
4010                  * forward until we find either a) one with a NULL route...
4011                  * insert ahead of that b) one with a different ifp.. insert
4012                  * after that. c) end of the list.. insert at the tail.
4013                  */
4014                 struct sctp_nets *netlook;
4015
4016                 do {
4017                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4018                         if (netlook == NULL) {
4019                                 /* End of the list */
4020                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4021                                 break;
4022                         } else if (netlook->ro.ro_rt == NULL) {
4023                                 /* next one has NO route */
4024                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4025                                 break;
4026                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4027                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4028                                     net, sctp_next);
4029                                 break;
4030                         }
4031                         /* Shift forward */
4032                         netfirst = netlook;
4033                 } while (netlook != NULL);
4034         }
4035
4036         /* got to have a primary set */
4037         if (stcb->asoc.primary_destination == 0) {
4038                 stcb->asoc.primary_destination = net;
4039         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4040                     (net->ro.ro_rt) &&
4041             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4042                 /* No route to current primary adopt new primary */
4043                 stcb->asoc.primary_destination = net;
4044         }
4045         /* Validate primary is first */
4046         net = TAILQ_FIRST(&stcb->asoc.nets);
4047         if ((net != stcb->asoc.primary_destination) &&
4048             (stcb->asoc.primary_destination)) {
4049                 /*
4050                  * first one on the list is NOT the primary sctp_cmpaddr()
4051                  * is much more efficient if the primary is the first on the
4052                  * list, make it so.
4053                  */
4054                 TAILQ_REMOVE(&stcb->asoc.nets,
4055                     stcb->asoc.primary_destination, sctp_next);
4056                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4057                     stcb->asoc.primary_destination, sctp_next);
4058         }
4059         return (0);
4060 }
4061
4062
4063 static uint32_t
4064 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4065 {
4066         uint32_t id;
4067         struct sctpasochead *head;
4068         struct sctp_tcb *lstcb;
4069
4070         SCTP_INP_WLOCK(inp);
4071 try_again:
4072         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4073                 /* TSNH */
4074                 SCTP_INP_WUNLOCK(inp);
4075                 return (0);
4076         }
4077         /*
4078          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4079          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4080          */
4081         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4082                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4083         }
4084         id = inp->sctp_associd_counter;
4085         inp->sctp_associd_counter++;
4086         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4087         if (lstcb) {
4088                 goto try_again;
4089         }
4090         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4091         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4092         stcb->asoc.in_asocid_hash = 1;
4093         SCTP_INP_WUNLOCK(inp);
4094         return id;
4095 }
4096
4097 /*
4098  * allocate an association and add it to the endpoint. The caller must be
4099  * careful to add all additional addresses once they are know right away or
4100  * else the assoc will be may experience a blackout scenario.
4101  */
4102 struct sctp_tcb *
4103 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4104     int *error, uint32_t override_tag, uint32_t vrf_id,
4105     struct thread *p
4106 )
4107 {
4108         /* note the p argument is only valid in unbound sockets */
4109
4110         struct sctp_tcb *stcb;
4111         struct sctp_association *asoc;
4112         struct sctpasochead *head;
4113         uint16_t rport;
4114         int err;
4115
4116         /*
4117          * Assumption made here: Caller has done a
4118          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4119          * address does not exist already.
4120          */
4121         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4122                 /* Hit max assoc, sorry no more */
4123                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4124                 *error = ENOBUFS;
4125                 return (NULL);
4126         }
4127         if (firstaddr == NULL) {
4128                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4129                 *error = EINVAL;
4130                 return (NULL);
4131         }
4132         SCTP_INP_RLOCK(inp);
4133         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4134             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4135             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4136                 /*
4137                  * If its in the TCP pool, its NOT allowed to create an
4138                  * association. The parent listener needs to call
4139                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4140                  * off, or connected one does this.. its an error.
4141                  */
4142                 SCTP_INP_RUNLOCK(inp);
4143                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4144                 *error = EINVAL;
4145                 return (NULL);
4146         }
4147         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4148             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4149                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4150                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4151                         SCTP_INP_RUNLOCK(inp);
4152                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4153                         *error = EINVAL;
4154                         return (NULL);
4155                 }
4156         }
4157         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4158 #ifdef SCTP_DEBUG
4159         if (firstaddr) {
4160                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4161                 switch (firstaddr->sa_family) {
4162 #ifdef INET
4163                 case AF_INET:
4164                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4165                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4166                         break;
4167 #endif
4168 #ifdef INET6
4169                 case AF_INET6:
4170                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4171                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4172                         break;
4173 #endif
4174                 default:
4175                         break;
4176                 }
4177         } else {
4178                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4179         }
4180 #endif                          /* SCTP_DEBUG */
4181         switch (firstaddr->sa_family) {
4182 #ifdef INET
4183         case AF_INET:
4184                 {
4185                         struct sockaddr_in *sin;
4186
4187                         sin = (struct sockaddr_in *)firstaddr;
4188                         if ((ntohs(sin->sin_port) == 0) ||
4189                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4190                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4191                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4192                                 /* Invalid address */
4193                                 SCTP_INP_RUNLOCK(inp);
4194                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4195                                 *error = EINVAL;
4196                                 return (NULL);
4197                         }
4198                         rport = sin->sin_port;
4199                         break;
4200                 }
4201 #endif
4202 #ifdef INET6
4203         case AF_INET6:
4204                 {
4205                         struct sockaddr_in6 *sin6;
4206
4207                         sin6 = (struct sockaddr_in6 *)firstaddr;
4208                         if ((ntohs(sin6->sin6_port) == 0) ||
4209                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4210                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4211                                 /* Invalid address */
4212                                 SCTP_INP_RUNLOCK(inp);
4213                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4214                                 *error = EINVAL;
4215                                 return (NULL);
4216                         }
4217                         rport = sin6->sin6_port;
4218                         break;
4219                 }
4220 #endif
4221         default:
4222                 /* not supported family type */
4223                 SCTP_INP_RUNLOCK(inp);
4224                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4225                 *error = EINVAL;
4226                 return (NULL);
4227         }
4228         SCTP_INP_RUNLOCK(inp);
4229         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4230                 /*
4231                  * If you have not performed a bind, then we need to do the
4232                  * ephemeral bind for you.
4233                  */
4234                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4235                     (struct sockaddr *)NULL,
4236                     (struct sctp_ifa *)NULL,
4237                     p
4238                     ))) {
4239                         /* bind error, probably perm */
4240                         *error = err;
4241                         return (NULL);
4242                 }
4243         }
4244         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4245         if (stcb == NULL) {
4246                 /* out of memory? */
4247                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4248                 *error = ENOMEM;
4249                 return (NULL);
4250         }
4251         SCTP_INCR_ASOC_COUNT();
4252
4253         bzero(stcb, sizeof(*stcb));
4254         asoc = &stcb->asoc;
4255
4256         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4257         SCTP_TCB_LOCK_INIT(stcb);
4258         SCTP_TCB_SEND_LOCK_INIT(stcb);
4259         stcb->rport = rport;
4260         /* setup back pointer's */
4261         stcb->sctp_ep = inp;
4262         stcb->sctp_socket = inp->sctp_socket;
4263         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4264                 /* failed */
4265                 SCTP_TCB_LOCK_DESTROY(stcb);
4266                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4267                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4268                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4269                 SCTP_DECR_ASOC_COUNT();
4270                 *error = err;
4271                 return (NULL);
4272         }
4273         /* and the port */
4274         SCTP_INP_INFO_WLOCK();
4275         SCTP_INP_WLOCK(inp);
4276         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4277                 /* inpcb freed while alloc going on */
4278                 SCTP_TCB_LOCK_DESTROY(stcb);
4279                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4280                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4281                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4282                 SCTP_INP_WUNLOCK(inp);
4283                 SCTP_INP_INFO_WUNLOCK();
4284                 SCTP_DECR_ASOC_COUNT();
4285                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4286                 *error = EINVAL;
4287                 return (NULL);
4288         }
4289         SCTP_TCB_LOCK(stcb);
4290
4291         /* now that my_vtag is set, add it to the hash */
4292         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4293         /* put it in the bucket in the vtag hash of assoc's for the system */
4294         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4295         SCTP_INP_INFO_WUNLOCK();
4296
4297         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4298                 /* failure.. memory error? */
4299                 if (asoc->strmout) {
4300                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4301                         asoc->strmout = NULL;
4302                 }
4303                 if (asoc->mapping_array) {
4304                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4305                         asoc->mapping_array = NULL;
4306                 }
4307                 if (asoc->nr_mapping_array) {
4308                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4309                         asoc->nr_mapping_array = NULL;
4310                 }
4311                 SCTP_DECR_ASOC_COUNT();
4312                 SCTP_TCB_UNLOCK(stcb);
4313                 SCTP_TCB_LOCK_DESTROY(stcb);
4314                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4315                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4316                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4317                 SCTP_INP_WUNLOCK(inp);
4318                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4319                 *error = ENOBUFS;
4320                 return (NULL);
4321         }
4322         /* Init all the timers */
4323         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4324         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4325         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4326         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4327         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4328         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4329         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4330
4331         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4332         /* now file the port under the hash as well */
4333         if (inp->sctp_tcbhash != NULL) {
4334                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4335                     inp->sctp_hashmark)];
4336                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4337         }
4338         SCTP_INP_WUNLOCK(inp);
4339         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4340         return (stcb);
4341 }
4342
4343
4344 void
4345 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4346 {
4347         struct sctp_association *asoc;
4348
4349         asoc = &stcb->asoc;
4350         asoc->numnets--;
4351         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4352         if (net == asoc->primary_destination) {
4353                 /* Reset primary */
4354                 struct sctp_nets *lnet;
4355
4356                 lnet = TAILQ_FIRST(&asoc->nets);
4357                 /*
4358                  * Mobility adaptation Ideally, if deleted destination is
4359                  * the primary, it becomes a fast retransmission trigger by
4360                  * the subsequent SET PRIMARY. (by micchie)
4361                  */
4362                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4363                     SCTP_MOBILITY_BASE) ||
4364                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4365                     SCTP_MOBILITY_FASTHANDOFF)) {
4366                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4367                         if (asoc->deleted_primary != NULL) {
4368                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4369                                 goto out;
4370                         }
4371                         asoc->deleted_primary = net;
4372                         atomic_add_int(&net->ref_count, 1);
4373                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4374                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4375                         sctp_mobility_feature_on(stcb->sctp_ep,
4376                             SCTP_MOBILITY_PRIM_DELETED);
4377                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4378                             stcb->sctp_ep, stcb, NULL);
4379                 }
4380 out:
4381                 /* Try to find a confirmed primary */
4382                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4383         }
4384         if (net == asoc->last_data_chunk_from) {
4385                 /* Reset primary */
4386                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4387         }
4388         if (net == asoc->last_control_chunk_from) {
4389                 /* Clear net */
4390                 asoc->last_control_chunk_from = NULL;
4391         }
4392         if (net == stcb->asoc.alternate) {
4393                 sctp_free_remote_addr(stcb->asoc.alternate);
4394                 stcb->asoc.alternate = NULL;
4395         }
4396         sctp_free_remote_addr(net);
4397 }
4398
4399 /*
4400  * remove a remote endpoint address from an association, it will fail if the
4401  * address does not exist.
4402  */
4403 int
4404 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4405 {
4406         /*
4407          * Here we need to remove a remote address. This is quite simple, we
4408          * first find it in the list of address for the association
4409          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4410          * on that item. Note we do not allow it to be removed if there are
4411          * no other addresses.
4412          */
4413         struct sctp_association *asoc;
4414         struct sctp_nets *net, *nnet;
4415
4416         asoc = &stcb->asoc;
4417
4418         /* locate the address */
4419         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4420                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4421                         continue;
4422                 }
4423                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4424                     remaddr)) {
4425                         /* we found the guy */
4426                         if (asoc->numnets < 2) {
4427                                 /* Must have at LEAST two remote addresses */
4428                                 return (-1);
4429                         } else {
4430                                 sctp_remove_net(stcb, net);
4431                                 return (0);
4432                         }
4433                 }
4434         }
4435         /* not found. */
4436         return (-2);
4437 }
4438
4439 void
4440 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4441 {
4442         struct sctpvtaghead *chain;
4443         struct sctp_tagblock *twait_block;
4444         int found = 0;
4445         int i;
4446
4447         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4448         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4449                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4450                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4451                             (twait_block->vtag_block[i].lport == lport) &&
4452                             (twait_block->vtag_block[i].rport == rport)) {
4453                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4454                                 twait_block->vtag_block[i].v_tag = 0;
4455                                 twait_block->vtag_block[i].lport = 0;
4456                                 twait_block->vtag_block[i].rport = 0;
4457                                 found = 1;
4458                                 break;
4459                         }
4460                 }
4461                 if (found)
4462                         break;
4463         }
4464 }
4465
4466 int
4467 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4468 {
4469         struct sctpvtaghead *chain;
4470         struct sctp_tagblock *twait_block;
4471         int found = 0;
4472         int i;
4473
4474         SCTP_INP_INFO_WLOCK();
4475         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4476         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4477                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4478                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4479                             (twait_block->vtag_block[i].lport == lport) &&
4480                             (twait_block->vtag_block[i].rport == rport)) {
4481                                 found = 1;
4482                                 break;
4483                         }
4484                 }
4485                 if (found)
4486                         break;
4487         }
4488         SCTP_INP_INFO_WUNLOCK();
4489         return (found);
4490 }
4491
4492
4493 void
4494 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4495 {
4496         struct sctpvtaghead *chain;
4497         struct sctp_tagblock *twait_block;
4498         struct timeval now;
4499         int set, i;
4500
4501         if (time == 0) {
4502                 /* Its disabled */
4503                 return;
4504         }
4505         (void)SCTP_GETTIME_TIMEVAL(&now);
4506         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4507         set = 0;
4508         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4509                 /* Block(s) present, lets find space, and expire on the fly */
4510                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4511                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4512                             !set) {
4513                                 twait_block->vtag_block[i].tv_sec_at_expire =
4514                                     now.tv_sec + time;
4515                                 twait_block->vtag_block[i].v_tag = tag;
4516                                 twait_block->vtag_block[i].lport = lport;
4517                                 twait_block->vtag_block[i].rport = rport;
4518                                 set = 1;
4519                         } else if ((twait_block->vtag_block[i].v_tag) &&
4520                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4521                                 /* Audit expires this guy */
4522                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4523                                 twait_block->vtag_block[i].v_tag = 0;
4524                                 twait_block->vtag_block[i].lport = 0;
4525                                 twait_block->vtag_block[i].rport = 0;
4526                                 if (set == 0) {
4527                                         /* Reuse it for my new tag */
4528                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4529                                         twait_block->vtag_block[i].v_tag = tag;
4530                                         twait_block->vtag_block[i].lport = lport;
4531                                         twait_block->vtag_block[i].rport = rport;
4532                                         set = 1;
4533                                 }
4534                         }
4535                 }
4536                 if (set) {
4537                         /*
4538                          * We only do up to the block where we can place our
4539                          * tag for audits
4540                          */
4541                         break;
4542                 }
4543         }
4544         /* Need to add a new block to chain */
4545         if (!set) {
4546                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4547                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4548                 if (twait_block == NULL) {
4549 #ifdef INVARIANTS
4550                         panic("Can not alloc tagblock");
4551 #endif
4552                         return;
4553                 }
4554                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4555                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4556                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4557                 twait_block->vtag_block[0].v_tag = tag;
4558                 twait_block->vtag_block[0].lport = lport;
4559                 twait_block->vtag_block[0].rport = rport;
4560         }
4561 }
4562
4563
4564
4565 /*-
4566  * Free the association after un-hashing the remote port. This
4567  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4568  * expect that the input to this function IS a locked TCB.
4569  * It will return 0, if it did NOT destroy the association (instead
4570  * it unlocks it. It will return NON-zero if it either destroyed the
4571  * association OR the association is already destroyed.
4572  */
4573 int
4574 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4575 {
4576         int i;
4577         struct sctp_association *asoc;
4578         struct sctp_nets *net, *nnet;
4579         struct sctp_laddr *laddr, *naddr;
4580         struct sctp_tmit_chunk *chk, *nchk;
4581         struct sctp_asconf_addr *aparam, *naparam;
4582         struct sctp_asconf_ack *aack, *naack;
4583         struct sctp_stream_reset_list *strrst, *nstrrst;
4584         struct sctp_queued_to_read *sq, *nsq;
4585         struct sctp_stream_queue_pending *sp, *nsp;
4586         sctp_sharedkey_t *shared_key, *nshared_key;
4587         struct socket *so;
4588
4589         /* first, lets purge the entry from the hash table. */
4590
4591 #ifdef SCTP_LOG_CLOSING
4592         sctp_log_closing(inp, stcb, 6);
4593 #endif
4594         if (stcb->asoc.state == 0) {
4595 #ifdef SCTP_LOG_CLOSING
4596                 sctp_log_closing(inp, NULL, 7);
4597 #endif
4598                 /* there is no asoc, really TSNH :-0 */
4599                 return (1);
4600         }
4601         if (stcb->asoc.alternate) {
4602                 sctp_free_remote_addr(stcb->asoc.alternate);
4603                 stcb->asoc.alternate = NULL;
4604         }
4605         /* TEMP CODE */
4606         if (stcb->freed_from_where == 0) {
4607                 /* Only record the first place free happened from */
4608                 stcb->freed_from_where = from_location;
4609         }
4610         /* TEMP CODE */
4611
4612         asoc = &stcb->asoc;
4613         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4614             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4615                 /* nothing around */
4616                 so = NULL;
4617         else
4618                 so = inp->sctp_socket;
4619
4620         /*
4621          * We used timer based freeing if a reader or writer is in the way.
4622          * So we first check if we are actually being called from a timer,
4623          * if so we abort early if a reader or writer is still in the way.
4624          */
4625         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4626             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4627                 /*
4628                  * is it the timer driving us? if so are the reader/writers
4629                  * gone?
4630                  */
4631                 if (stcb->asoc.refcnt) {
4632                         /* nope, reader or writer in the way */
4633                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4634                         /* no asoc destroyed */
4635                         SCTP_TCB_UNLOCK(stcb);
4636 #ifdef SCTP_LOG_CLOSING
4637                         sctp_log_closing(inp, stcb, 8);
4638 #endif
4639                         return (0);
4640                 }
4641         }
4642         /* now clean up any other timers */
4643         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4644         asoc->dack_timer.self = NULL;
4645         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4646         /*-
4647          * For stream reset we don't blast this unless
4648          * it is a str-reset timer, it might be the
4649          * free-asoc timer which we DON'T want to
4650          * disturb.
4651          */
4652         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4653                 asoc->strreset_timer.self = NULL;
4654         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4655         asoc->asconf_timer.self = NULL;
4656         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4657         asoc->autoclose_timer.self = NULL;
4658         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4659         asoc->shut_guard_timer.self = NULL;
4660         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4661         asoc->delayed_event_timer.self = NULL;
4662         /* Mobility adaptation */
4663         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4664         asoc->delete_prim_timer.self = NULL;
4665         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4666                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4667                 net->rxt_timer.self = NULL;
4668                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4669                 net->pmtu_timer.self = NULL;
4670                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4671                 net->hb_timer.self = NULL;
4672         }
4673         /* Now the read queue needs to be cleaned up (only once) */
4674         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4675                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4676                 SCTP_INP_READ_LOCK(inp);
4677                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4678                         if (sq->stcb == stcb) {
4679                                 sq->do_not_ref_stcb = 1;
4680                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4681                                 /*
4682                                  * If there is no end, there never will be
4683                                  * now.
4684                                  */
4685                                 if (sq->end_added == 0) {
4686                                         /* Held for PD-API clear that. */
4687                                         sq->pdapi_aborted = 1;
4688                                         sq->held_length = 0;
4689                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4690                                                 /*
4691                                                  * Need to add a PD-API
4692                                                  * aborted indication.
4693                                                  * Setting the control_pdapi
4694                                                  * assures that it will be
4695                                                  * added right after this
4696                                                  * msg.
4697                                                  */
4698                                                 uint32_t strseq;
4699
4700                                                 stcb->asoc.control_pdapi = sq;
4701                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4702                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4703                                                     stcb,
4704                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4705                                                     (void *)&strseq,
4706                                                     SCTP_SO_LOCKED);
4707                                                 stcb->asoc.control_pdapi = NULL;
4708                                         }
4709                                 }
4710                                 /* Add an end to wake them */
4711                                 sq->end_added = 1;
4712                         }
4713                 }
4714                 SCTP_INP_READ_UNLOCK(inp);
4715                 if (stcb->block_entry) {
4716                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4717                         stcb->block_entry->error = ECONNRESET;
4718                         stcb->block_entry = NULL;
4719                 }
4720         }
4721         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4722                 /*
4723                  * Someone holds a reference OR the socket is unaccepted
4724                  * yet.
4725                  */
4726                 if ((stcb->asoc.refcnt) ||
4727                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4728                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4729                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4730                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4731                 }
4732                 SCTP_TCB_UNLOCK(stcb);
4733                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4734                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4735                         /* nothing around */
4736                         so = NULL;
4737                 if (so) {
4738                         /* Wake any reader/writers */
4739                         sctp_sorwakeup(inp, so);
4740                         sctp_sowwakeup(inp, so);
4741                 }
4742 #ifdef SCTP_LOG_CLOSING
4743                 sctp_log_closing(inp, stcb, 9);
4744 #endif
4745                 /* no asoc destroyed */
4746                 return (0);
4747         }
4748 #ifdef SCTP_LOG_CLOSING
4749         sctp_log_closing(inp, stcb, 10);
4750 #endif
4751         /*
4752          * When I reach here, no others want to kill the assoc yet.. and I
4753          * own the lock. Now its possible an abort comes in when I do the
4754          * lock exchange below to grab all the locks to do the final take
4755          * out. to prevent this we increment the count, which will start a
4756          * timer and blow out above thus assuring us that we hold exclusive
4757          * killing of the asoc. Note that after getting back the TCB lock we
4758          * will go ahead and increment the counter back up and stop any
4759          * timer a passing stranger may have started :-S
4760          */
4761         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4762                 atomic_add_int(&stcb->asoc.refcnt, 1);
4763
4764                 SCTP_TCB_UNLOCK(stcb);
4765                 SCTP_INP_INFO_WLOCK();
4766                 SCTP_INP_WLOCK(inp);
4767                 SCTP_TCB_LOCK(stcb);
4768         }
4769         /* Double check the GONE flag */
4770         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4771             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4772                 /* nothing around */
4773                 so = NULL;
4774
4775         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4776             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4777                 /*
4778                  * For TCP type we need special handling when we are
4779                  * connected. We also include the peel'ed off ones to.
4780                  */
4781                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4782                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4783                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4784                         if (so) {
4785                                 SOCK_LOCK(so);
4786                                 if (so->so_rcv.sb_cc == 0) {
4787                                         so->so_state &= ~(SS_ISCONNECTING |
4788                                             SS_ISDISCONNECTING |
4789                                             SS_ISCONFIRMING |
4790                                             SS_ISCONNECTED);
4791                                 }
4792                                 socantrcvmore_locked(so);
4793                                 sctp_sowwakeup(inp, so);
4794                                 sctp_sorwakeup(inp, so);
4795                                 SCTP_SOWAKEUP(so);
4796                         }
4797                 }
4798         }
4799         /*
4800          * Make it invalid too, that way if its about to run it will abort
4801          * and return.
4802          */
4803         /* re-increment the lock */
4804         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4805                 atomic_add_int(&stcb->asoc.refcnt, -1);
4806         }
4807         if (stcb->asoc.refcnt) {
4808                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4809                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4810                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4811                         SCTP_INP_INFO_WUNLOCK();
4812                         SCTP_INP_WUNLOCK(inp);
4813                 }
4814                 SCTP_TCB_UNLOCK(stcb);
4815                 return (0);
4816         }
4817         asoc->state = 0;
4818         if (inp->sctp_tcbhash) {
4819                 LIST_REMOVE(stcb, sctp_tcbhash);
4820         }
4821         if (stcb->asoc.in_asocid_hash) {
4822                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4823         }
4824         /* Now lets remove it from the list of ALL associations in the EP */
4825         LIST_REMOVE(stcb, sctp_tcblist);
4826         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4827                 SCTP_INP_INCR_REF(inp);
4828                 SCTP_INP_WUNLOCK(inp);
4829         }
4830         /* pull from vtag hash */
4831         LIST_REMOVE(stcb, sctp_asocs);
4832         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4833             inp->sctp_lport, stcb->rport);
4834
4835         /*
4836          * Now restop the timers to be sure this is paranoia at is finest!
4837          */
4838         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4839         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4840         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4841         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4842         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4843         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4844         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4845         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4846                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4847                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4848                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4849         }
4850
4851         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4852         /*
4853          * The chunk lists and such SHOULD be empty but we check them just
4854          * in case.
4855          */
4856         /* anything on the wheel needs to be removed */
4857         for (i = 0; i < asoc->streamoutcnt; i++) {
4858                 struct sctp_stream_out *outs;
4859
4860                 outs = &asoc->strmout[i];
4861                 /* now clean up any chunks here */
4862                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4863                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4864                         sctp_free_spbufspace(stcb, asoc, sp);
4865                         if (sp->data) {
4866                                 if (so) {
4867                                         /* Still an open socket - report */
4868                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4869                                             0, (void *)sp, SCTP_SO_LOCKED);
4870                                 }
4871                                 if (sp->data) {
4872                                         sctp_m_freem(sp->data);
4873                                         sp->data = NULL;
4874                                         sp->tail_mbuf = NULL;
4875                                         sp->length = 0;
4876                                 }
4877                         }
4878                         if (sp->net) {
4879                                 sctp_free_remote_addr(sp->net);
4880                                 sp->net = NULL;
4881                         }
4882                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4883                 }
4884         }
4885         /* sa_ignore FREED_MEMORY */
4886         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4887                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4888                 SCTP_FREE(strrst, SCTP_M_STRESET);
4889         }
4890         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4891                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4892                 if (sq->data) {
4893                         sctp_m_freem(sq->data);
4894                         sq->data = NULL;
4895                 }
4896                 sctp_free_remote_addr(sq->whoFrom);
4897                 sq->whoFrom = NULL;
4898                 sq->stcb = NULL;
4899                 /* Free the ctl entry */
4900                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4901                 SCTP_DECR_READQ_COUNT();
4902                 /* sa_ignore FREED_MEMORY */
4903         }
4904         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4905                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4906                 if (chk->data) {
4907                         sctp_m_freem(chk->data);
4908                         chk->data = NULL;
4909                 }
4910                 if (chk->holds_key_ref)
4911                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4912                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4913                 SCTP_DECR_CHK_COUNT();
4914                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4915                 asoc->free_chunk_cnt--;
4916                 /* sa_ignore FREED_MEMORY */
4917         }
4918         /* pending send queue SHOULD be empty */
4919         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4920                 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
4921                         asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
4922 #ifdef INVARIANTS
4923                 } else {
4924                         panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
4925 #endif
4926                 }
4927                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4928                 if (chk->data) {
4929                         if (so) {
4930                                 /* Still a socket? */
4931                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
4932                                     0, chk, SCTP_SO_LOCKED);
4933                         }
4934                         if (chk->data) {
4935                                 sctp_m_freem(chk->data);
4936                                 chk->data = NULL;
4937                         }
4938                 }
4939                 if (chk->holds_key_ref)
4940                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4941                 if (chk->whoTo) {
4942                         sctp_free_remote_addr(chk->whoTo);
4943                         chk->whoTo = NULL;
4944                 }
4945                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4946                 SCTP_DECR_CHK_COUNT();
4947                 /* sa_ignore FREED_MEMORY */
4948         }
4949         /* sent queue SHOULD be empty */
4950         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
4951                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
4952                         if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
4953                                 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
4954 #ifdef INVARIANTS
4955                         } else {
4956                                 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
4957 #endif
4958                         }
4959                 }
4960                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4961                 if (chk->data) {
4962                         if (so) {
4963                                 /* Still a socket? */
4964                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
4965                                     0, chk, SCTP_SO_LOCKED);
4966                         }
4967                         if (chk->data) {
4968                                 sctp_m_freem(chk->data);
4969                                 chk->data = NULL;
4970                         }
4971                 }
4972                 if (chk->holds_key_ref)
4973                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4974                 sctp_free_remote_addr(chk->whoTo);
4975                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4976                 SCTP_DECR_CHK_COUNT();
4977                 /* sa_ignore FREED_MEMORY */
4978         }
4979 #ifdef INVARIANTS
4980         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
4981                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
4982                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
4983                 }
4984         }
4985 #endif
4986         /* control queue MAY not be empty */
4987         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
4988                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4989                 if (chk->data) {
4990                         sctp_m_freem(chk->data);
4991                         chk->data = NULL;
4992                 }
4993                 if (chk->holds_key_ref)
4994                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4995                 sctp_free_remote_addr(chk->whoTo);
4996                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4997                 SCTP_DECR_CHK_COUNT();
4998                 /* sa_ignore FREED_MEMORY */
4999         }
5000         /* ASCONF queue MAY not be empty */
5001         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5002                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5003                 if (chk->data) {
5004                         sctp_m_freem(chk->data);
5005                         chk->data = NULL;
5006                 }
5007                 if (chk->holds_key_ref)
5008                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5009                 sctp_free_remote_addr(chk->whoTo);
5010                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5011                 SCTP_DECR_CHK_COUNT();
5012                 /* sa_ignore FREED_MEMORY */
5013         }
5014         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5015                 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5016                 if (chk->data) {
5017                         sctp_m_freem(chk->data);
5018                         chk->data = NULL;
5019                 }
5020                 if (chk->holds_key_ref)
5021                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5022                 sctp_free_remote_addr(chk->whoTo);
5023                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5024                 SCTP_DECR_CHK_COUNT();
5025                 /* sa_ignore FREED_MEMORY */
5026         }
5027
5028         if (asoc->mapping_array) {
5029                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5030                 asoc->mapping_array = NULL;
5031         }
5032         if (asoc->nr_mapping_array) {
5033                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5034                 asoc->nr_mapping_array = NULL;
5035         }
5036         /* the stream outs */
5037         if (asoc->strmout) {
5038                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5039                 asoc->strmout = NULL;
5040         }
5041         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5042         if (asoc->strmin) {
5043                 struct sctp_queued_to_read *ctl, *nctl;
5044
5045                 for (i = 0; i < asoc->streamincnt; i++) {
5046                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5047                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5048                                 sctp_free_remote_addr(ctl->whoFrom);
5049                                 if (ctl->data) {
5050                                         sctp_m_freem(ctl->data);
5051                                         ctl->data = NULL;
5052                                 }
5053                                 /*
5054                                  * We don't free the address here since all
5055                                  * the net's were freed above.
5056                                  */
5057                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5058                                 SCTP_DECR_READQ_COUNT();
5059                         }
5060                 }
5061                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5062                 asoc->strmin = NULL;
5063         }
5064         asoc->streamincnt = 0;
5065         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5066 #ifdef INVARIANTS
5067                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5068                         panic("no net's left alloc'ed, or list points to itself");
5069                 }
5070 #endif
5071                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5072                 sctp_free_remote_addr(net);
5073         }
5074         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5075                 /* sa_ignore FREED_MEMORY */
5076                 sctp_remove_laddr(laddr);
5077         }
5078
5079         /* pending asconf (address) parameters */
5080         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5081                 /* sa_ignore FREED_MEMORY */
5082                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5083                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5084         }
5085         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5086                 /* sa_ignore FREED_MEMORY */
5087                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5088                 if (aack->data != NULL) {
5089                         sctp_m_freem(aack->data);
5090                 }
5091                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5092         }
5093         /* clean up auth stuff */
5094         if (asoc->local_hmacs)
5095                 sctp_free_hmaclist(asoc->local_hmacs);
5096         if (asoc->peer_hmacs)
5097                 sctp_free_hmaclist(asoc->peer_hmacs);
5098
5099         if (asoc->local_auth_chunks)
5100                 sctp_free_chunklist(asoc->local_auth_chunks);
5101         if (asoc->peer_auth_chunks)
5102                 sctp_free_chunklist(asoc->peer_auth_chunks);
5103
5104         sctp_free_authinfo(&asoc->authinfo);
5105
5106         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5107                 LIST_REMOVE(shared_key, next);
5108                 sctp_free_sharedkey(shared_key);
5109                 /* sa_ignore FREED_MEMORY */
5110         }
5111
5112         /* Insert new items here :> */
5113
5114         /* Get rid of LOCK */
5115         SCTP_TCB_UNLOCK(stcb);
5116         SCTP_TCB_LOCK_DESTROY(stcb);
5117         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5118         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5119                 SCTP_INP_INFO_WUNLOCK();
5120                 SCTP_INP_RLOCK(inp);
5121         }
5122 #ifdef SCTP_TRACK_FREED_ASOCS
5123         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5124                 /* now clean up the tasoc itself */
5125                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5126                 SCTP_DECR_ASOC_COUNT();
5127         } else {
5128                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5129         }
5130 #else
5131         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5132         SCTP_DECR_ASOC_COUNT();
5133 #endif
5134         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5135                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5136                         /*
5137                          * If its NOT the inp_free calling us AND sctp_close
5138                          * as been called, we call back...
5139                          */
5140                         SCTP_INP_RUNLOCK(inp);
5141                         /*
5142                          * This will start the kill timer (if we are the
5143                          * last one) since we hold an increment yet. But
5144                          * this is the only safe way to do this since
5145                          * otherwise if the socket closes at the same time
5146                          * we are here we might collide in the cleanup.
5147                          */
5148                         sctp_inpcb_free(inp,
5149                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5150                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5151                         SCTP_INP_DECR_REF(inp);
5152                         goto out_of;
5153                 } else {
5154                         /* The socket is still open. */
5155                         SCTP_INP_DECR_REF(inp);
5156                 }
5157         }
5158         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5159                 SCTP_INP_RUNLOCK(inp);
5160         }
5161 out_of:
5162         /* destroyed the asoc */
5163 #ifdef SCTP_LOG_CLOSING
5164         sctp_log_closing(inp, NULL, 11);
5165 #endif
5166         return (1);
5167 }
5168
5169
5170
5171 /*
5172  * determine if a destination is "reachable" based upon the addresses bound
5173  * to the current endpoint (e.g. only v4 or v6 currently bound)
5174  */
5175 /*
5176  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5177  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5178  * types bound as its endpoint
5179  */
5180 int
5181 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5182 {
5183         struct sctp_inpcb *inp;
5184         int answer;
5185
5186         /*
5187          * No locks here, the TCB, in all cases is already locked and an
5188          * assoc is up. There is either a INP lock by the caller applied (in
5189          * asconf case when deleting an address) or NOT in the HB case,
5190          * however if HB then the INP increment is up and the INP will not
5191          * be removed (on top of the fact that we have a TCB lock). So we
5192          * only want to read the sctp_flags, which is either bound-all or
5193          * not.. no protection needed since once an assoc is up you can't be
5194          * changing your binding.
5195          */
5196         inp = stcb->sctp_ep;
5197         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5198                 /* if bound all, destination is not restricted */
5199                 /*
5200                  * RRS: Question during lock work: Is this correct? If you
5201                  * are bound-all you still might need to obey the V4--V6
5202                  * flags??? IMO this bound-all stuff needs to be removed!
5203                  */
5204                 return (1);
5205         }
5206         /* NOTE: all "scope" checks are done when local addresses are added */
5207         switch (destaddr->sa_family) {
5208 #ifdef INET6
5209         case AF_INET6:
5210                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5211                 break;
5212 #endif
5213 #ifdef INET
5214         case AF_INET:
5215                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5216                 break;
5217 #endif
5218         default:
5219                 /* invalid family, so it's unreachable */
5220                 answer = 0;
5221                 break;
5222         }
5223         return (answer);
5224 }
5225
5226 /*
5227  * update the inp_vflags on an endpoint
5228  */
5229 static void
5230 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5231 {
5232         struct sctp_laddr *laddr;
5233
5234         /* first clear the flag */
5235         inp->ip_inp.inp.inp_vflag = 0;
5236         /* set the flag based on addresses on the ep list */
5237         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5238                 if (laddr->ifa == NULL) {
5239                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5240                             __FUNCTION__);
5241                         continue;
5242                 }
5243                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5244                         continue;
5245                 }
5246                 switch (laddr->ifa->address.sa.sa_family) {
5247 #ifdef INET6
5248                 case AF_INET6:
5249                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5250                         break;
5251 #endif
5252 #ifdef INET
5253                 case AF_INET:
5254                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5255                         break;
5256 #endif
5257                 default:
5258                         break;
5259                 }
5260         }
5261 }
5262
5263 /*
5264  * Add the address to the endpoint local address list There is nothing to be
5265  * done if we are bound to all addresses
5266  */
5267 void
5268 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5269 {
5270         struct sctp_laddr *laddr;
5271         int fnd, error = 0;
5272
5273         fnd = 0;
5274
5275         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5276                 /* You are already bound to all. You have it already */
5277                 return;
5278         }
5279 #ifdef INET6
5280         if (ifa->address.sa.sa_family == AF_INET6) {
5281                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5282                         /* Can't bind a non-useable addr. */
5283                         return;
5284                 }
5285         }
5286 #endif
5287         /* first, is it already present? */
5288         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5289                 if (laddr->ifa == ifa) {
5290                         fnd = 1;
5291                         break;
5292                 }
5293         }
5294
5295         if (fnd == 0) {
5296                 /* Not in the ep list */
5297                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5298                 if (error != 0)
5299                         return;
5300                 inp->laddr_count++;
5301                 /* update inp_vflag flags */
5302                 switch (ifa->address.sa.sa_family) {
5303 #ifdef INET6
5304                 case AF_INET6:
5305                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5306                         break;
5307 #endif
5308 #ifdef INET
5309                 case AF_INET:
5310                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5311                         break;
5312 #endif
5313                 default:
5314                         break;
5315                 }
5316         }
5317         return;
5318 }
5319
5320
5321 /*
5322  * select a new (hopefully reachable) destination net (should only be used
5323  * when we deleted an ep addr that is the only usable source address to reach
5324  * the destination net)
5325  */
5326 static void
5327 sctp_select_primary_destination(struct sctp_tcb *stcb)
5328 {
5329         struct sctp_nets *net;
5330
5331         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5332                 /* for now, we'll just pick the first reachable one we find */
5333                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5334                         continue;
5335                 if (sctp_destination_is_reachable(stcb,
5336                     (struct sockaddr *)&net->ro._l_addr)) {
5337                         /* found a reachable destination */
5338                         stcb->asoc.primary_destination = net;
5339                 }
5340         }
5341         /* I can't there from here! ...we're gonna die shortly... */
5342 }
5343
5344
5345 /*
5346  * Delete the address from the endpoint local address list There is nothing
5347  * to be done if we are bound to all addresses
5348  */
5349 void
5350 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5351 {
5352         struct sctp_laddr *laddr;
5353         int fnd;
5354
5355         fnd = 0;
5356         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5357                 /* You are already bound to all. You have it already */
5358                 return;
5359         }
5360         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5361                 if (laddr->ifa == ifa) {
5362                         fnd = 1;
5363                         break;
5364                 }
5365         }
5366         if (fnd && (inp->laddr_count < 2)) {
5367                 /* can't delete unless there are at LEAST 2 addresses */
5368                 return;
5369         }
5370         if (fnd) {
5371                 /*
5372                  * clean up any use of this address go through our
5373                  * associations and clear any last_used_address that match
5374                  * this one for each assoc, see if a new primary_destination
5375                  * is needed
5376                  */
5377                 struct sctp_tcb *stcb;
5378
5379                 /* clean up "next_addr_touse" */
5380                 if (inp->next_addr_touse == laddr)
5381                         /* delete this address */
5382                         inp->next_addr_touse = NULL;
5383
5384                 /* clean up "last_used_address" */
5385                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5386                         struct sctp_nets *net;
5387
5388                         SCTP_TCB_LOCK(stcb);
5389                         if (stcb->asoc.last_used_address == laddr)
5390                                 /* delete this address */
5391                                 stcb->asoc.last_used_address = NULL;
5392                         /*
5393                          * Now spin through all the nets and purge any ref
5394                          * to laddr
5395                          */
5396                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5397                                 if (net->ro._s_addr &&
5398                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5399                                         /* Yep, purge src address selected */
5400                                         sctp_rtentry_t *rt;
5401
5402                                         /* delete this address if cached */
5403                                         rt = net->ro.ro_rt;
5404                                         if (rt != NULL) {
5405                                                 RTFREE(rt);
5406                                                 net->ro.ro_rt = NULL;
5407                                         }
5408                                         sctp_free_ifa(net->ro._s_addr);
5409                                         net->ro._s_addr = NULL;
5410                                         net->src_addr_selected = 0;
5411                                 }
5412                         }
5413                         SCTP_TCB_UNLOCK(stcb);
5414                 }               /* for each tcb */
5415                 /* remove it from the ep list */
5416                 sctp_remove_laddr(laddr);
5417                 inp->laddr_count--;
5418                 /* update inp_vflag flags */
5419                 sctp_update_ep_vflag(inp);
5420         }
5421         return;
5422 }
5423
5424 /*
5425  * Add the address to the TCB local address restricted list.
5426  * This is a "pending" address list (eg. addresses waiting for an
5427  * ASCONF-ACK response) and cannot be used as a valid source address.
5428  */
5429 void
5430 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5431 {
5432         struct sctp_laddr *laddr;
5433         struct sctpladdr *list;
5434
5435         /*
5436          * Assumes TCB is locked.. and possibly the INP. May need to
5437          * confirm/fix that if we need it and is not the case.
5438          */
5439         list = &stcb->asoc.sctp_restricted_addrs;
5440
5441 #ifdef INET6
5442         if (ifa->address.sa.sa_family == AF_INET6) {
5443                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5444                         /* Can't bind a non-existent addr. */
5445                         return;
5446                 }
5447         }
5448 #endif
5449         /* does the address already exist? */
5450         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5451                 if (laddr->ifa == ifa) {
5452                         return;
5453                 }
5454         }
5455
5456         /* add to the list */
5457         (void)sctp_insert_laddr(list, ifa, 0);
5458         return;
5459 }
5460
5461 /*
5462  * insert an laddr entry with the given ifa for the desired list
5463  */
5464 int
5465 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5466 {
5467         struct sctp_laddr *laddr;
5468
5469         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5470         if (laddr == NULL) {
5471                 /* out of memory? */
5472                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5473                 return (EINVAL);
5474         }
5475         SCTP_INCR_LADDR_COUNT();
5476         bzero(laddr, sizeof(*laddr));
5477         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5478         laddr->ifa = ifa;
5479         laddr->action = act;
5480         atomic_add_int(&ifa->refcount, 1);
5481         /* insert it */
5482         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5483
5484         return (0);
5485 }
5486
5487 /*
5488  * Remove an laddr entry from the local address list (on an assoc)
5489  */
5490 void
5491 sctp_remove_laddr(struct sctp_laddr *laddr)
5492 {
5493
5494         /* remove from the list */
5495         LIST_REMOVE(laddr, sctp_nxt_addr);
5496         sctp_free_ifa(laddr->ifa);
5497         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5498         SCTP_DECR_LADDR_COUNT();
5499 }
5500
5501 /*
5502  * Remove a local address from the TCB local address restricted list
5503  */
5504 void
5505 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5506 {
5507         struct sctp_inpcb *inp;
5508         struct sctp_laddr *laddr;
5509
5510         /*
5511          * This is called by asconf work. It is assumed that a) The TCB is
5512          * locked and b) The INP is locked. This is true in as much as I can
5513          * trace through the entry asconf code where I did these locks.
5514          * Again, the ASCONF code is a bit different in that it does lock
5515          * the INP during its work often times. This must be since we don't
5516          * want other proc's looking up things while what they are looking
5517          * up is changing :-D
5518          */
5519
5520         inp = stcb->sctp_ep;
5521         /* if subset bound and don't allow ASCONF's, can't delete last */
5522         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5523             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5524                 if (stcb->sctp_ep->laddr_count < 2) {
5525                         /* can't delete last address */
5526                         return;
5527                 }
5528         }
5529         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5530                 /* remove the address if it exists */
5531                 if (laddr->ifa == NULL)
5532                         continue;
5533                 if (laddr->ifa == ifa) {
5534                         sctp_remove_laddr(laddr);
5535                         return;
5536                 }
5537         }
5538
5539         /* address not found! */
5540         return;
5541 }
5542
5543 /*
5544  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5545  */
5546 /* sysctl */
5547 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5548 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5549
5550
5551
5552 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5553 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5554 int *sctp_cpuarry = NULL;
5555 void
5556 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5557 {
5558         /* Queue a packet to a processor for the specified core */
5559         struct sctp_mcore_queue *qent;
5560         struct sctp_mcore_ctrl *wkq;
5561         int need_wake = 0;
5562
5563         if (sctp_mcore_workers == NULL) {
5564                 /* Something went way bad during setup */
5565                 sctp_input_with_port(m, off, 0);
5566                 return;
5567         }
5568         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5569             (sizeof(struct sctp_mcore_queue)),
5570             SCTP_M_MCORE);
5571         if (qent == NULL) {
5572                 /* This is trouble  */
5573                 sctp_input_with_port(m, off, 0);
5574                 return;
5575         }
5576         qent->vn = curvnet;
5577         qent->m = m;
5578         qent->off = off;
5579         qent->v6 = 0;
5580         wkq = &sctp_mcore_workers[cpu_to_use];
5581         SCTP_MCORE_QLOCK(wkq);
5582
5583         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5584         if (wkq->running == 0) {
5585                 need_wake = 1;
5586         }
5587         SCTP_MCORE_QUNLOCK(wkq);
5588         if (need_wake) {
5589                 wakeup(&wkq->running);
5590         }
5591 }
5592
5593 static void
5594 sctp_mcore_thread(void *arg)
5595 {
5596
5597         struct sctp_mcore_ctrl *wkq;
5598         struct sctp_mcore_queue *qent;
5599
5600         wkq = (struct sctp_mcore_ctrl *)arg;
5601         struct mbuf *m;
5602         int off, v6;
5603
5604         /* Wait for first tickle */
5605         SCTP_MCORE_LOCK(wkq);
5606         wkq->running = 0;
5607         msleep(&wkq->running,
5608             &wkq->core_mtx,
5609             0, "wait for pkt", 0);
5610         SCTP_MCORE_UNLOCK(wkq);
5611
5612         /* Bind to our cpu */
5613         thread_lock(curthread);
5614         sched_bind(curthread, wkq->cpuid);
5615         thread_unlock(curthread);
5616
5617         /* Now lets start working */
5618         SCTP_MCORE_LOCK(wkq);
5619         /* Now grab lock and go */
5620         for (;;) {
5621                 SCTP_MCORE_QLOCK(wkq);
5622 skip_sleep:
5623                 wkq->running = 1;
5624                 qent = TAILQ_FIRST(&wkq->que);
5625                 if (qent) {
5626                         TAILQ_REMOVE(&wkq->que, qent, next);
5627                         SCTP_MCORE_QUNLOCK(wkq);
5628                         CURVNET_SET(qent->vn);
5629                         m = qent->m;
5630                         off = qent->off;
5631                         v6 = qent->v6;
5632                         SCTP_FREE(qent, SCTP_M_MCORE);
5633                         if (v6 == 0) {
5634                                 sctp_input_with_port(m, off, 0);
5635                         } else {
5636                                 SCTP_PRINTF("V6 not yet supported\n");
5637                                 sctp_m_freem(m);
5638                         }
5639                         CURVNET_RESTORE();
5640                         SCTP_MCORE_QLOCK(wkq);
5641                 }
5642                 wkq->running = 0;
5643                 if (!TAILQ_EMPTY(&wkq->que)) {
5644                         goto skip_sleep;
5645                 }
5646                 SCTP_MCORE_QUNLOCK(wkq);
5647                 msleep(&wkq->running,
5648                     &wkq->core_mtx,
5649                     0, "wait for pkt", 0);
5650         }
5651 }
5652
5653 static void
5654 sctp_startup_mcore_threads(void)
5655 {
5656         int i, cpu;
5657
5658         if (mp_ncpus == 1)
5659                 return;
5660
5661         if (sctp_mcore_workers != NULL) {
5662                 /*
5663                  * Already been here in some previous vnet?
5664                  */
5665                 return;
5666         }
5667         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5668             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5669             SCTP_M_MCORE);
5670         if (sctp_mcore_workers == NULL) {
5671                 /* TSNH I hope */
5672                 return;
5673         }
5674         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5675             sizeof(struct sctp_mcore_ctrl)));
5676         /* Init the structures */
5677         for (i = 0; i <= mp_maxid; i++) {
5678                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5679                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5680                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5681                 sctp_mcore_workers[i].cpuid = i;
5682         }
5683         if (sctp_cpuarry == NULL) {
5684                 SCTP_MALLOC(sctp_cpuarry, int *,
5685                     (mp_ncpus * sizeof(int)),
5686                     SCTP_M_MCORE);
5687                 i = 0;
5688                 CPU_FOREACH(cpu) {
5689                         sctp_cpuarry[i] = cpu;
5690                         i++;
5691                 }
5692         }
5693         /* Now start them all */
5694         CPU_FOREACH(cpu) {
5695                 (void)kproc_create(sctp_mcore_thread,
5696                     (void *)&sctp_mcore_workers[cpu],
5697                     &sctp_mcore_workers[cpu].thread_proc,
5698                     RFPROC,
5699                     SCTP_KTHREAD_PAGES,
5700                     SCTP_MCORE_NAME);
5701
5702         }
5703 }
5704
5705 #endif
5706
5707 void
5708 sctp_pcb_init()
5709 {
5710         /*
5711          * SCTP initialization for the PCB structures should be called by
5712          * the sctp_init() funciton.
5713          */
5714         int i;
5715         struct timeval tv;
5716
5717         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5718                 /* error I was called twice */
5719                 return;
5720         }
5721         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5722
5723 #if defined(SCTP_LOCAL_TRACE_BUF)
5724         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5725 #endif
5726 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5727         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5728             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5729             SCTP_M_MCORE);
5730 #endif
5731         (void)SCTP_GETTIME_TIMEVAL(&tv);
5732 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5733         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5734         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5735         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5736 #else
5737         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5738         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5739         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5740 #endif
5741         /* init the empty list of (All) Endpoints */
5742         LIST_INIT(&SCTP_BASE_INFO(listhead));
5743
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
5757
5758         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5759             &SCTP_BASE_INFO(hashvrfmark));
5760
5761         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5762             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5763         /* init the zones */
5764         /*
5765          * FIX ME: Should check for NULL returns, but if it does fail we are
5766          * doomed to panic anyways... add later maybe.
5767          */
5768         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5769             sizeof(struct sctp_inpcb), maxsockets);
5770
5771         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5772             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5773
5774         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5775             sizeof(struct sctp_laddr),
5776             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5777
5778         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5779             sizeof(struct sctp_nets),
5780             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5781
5782         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5783             sizeof(struct sctp_tmit_chunk),
5784             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5785
5786         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5787             sizeof(struct sctp_queued_to_read),
5788             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5789
5790         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5791             sizeof(struct sctp_stream_queue_pending),
5792             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5793
5794         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5795             sizeof(struct sctp_asconf),
5796             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5797
5798         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5799             sizeof(struct sctp_asconf_ack),
5800             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5801
5802
5803         /* Master Lock INIT for info structure */
5804         SCTP_INP_INFO_LOCK_INIT();
5805         SCTP_STATLOG_INIT_LOCK();
5806
5807         SCTP_IPI_COUNT_INIT();
5808         SCTP_IPI_ADDR_INIT();
5809 #ifdef SCTP_PACKET_LOGGING
5810         SCTP_IP_PKTLOG_INIT();
5811 #endif
5812         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5813
5814         SCTP_WQ_ADDR_INIT();
5815         /* not sure if we need all the counts */
5816         SCTP_BASE_INFO(ipi_count_ep) = 0;
5817         /* assoc/tcb zone info */
5818         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5819         /* local addrlist zone info */
5820         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5821         /* remote addrlist zone info */
5822         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5823         /* chunk info */
5824         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5825
5826         /* socket queue zone info */
5827         SCTP_BASE_INFO(ipi_count_readq) = 0;
5828
5829         /* stream out queue cont */
5830         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5831
5832         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5833         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5834
5835         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5836
5837         /* Init the TIMEWAIT list */
5838         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5839                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5840         }
5841         sctp_startup_iterator();
5842
5843 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5844         sctp_startup_mcore_threads();
5845 #endif
5846
5847         /*
5848          * INIT the default VRF which for BSD is the only one, other O/S's
5849          * may have more. But initially they must start with one and then
5850          * add the VRF's as addresses are added.
5851          */
5852         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5853 }
5854
5855 /*
5856  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5857  */
5858 void
5859 sctp_pcb_finish(void)
5860 {
5861         struct sctp_vrflist *vrf_bucket;
5862         struct sctp_vrf *vrf, *nvrf;
5863         struct sctp_ifn *ifn, *nifn;
5864         struct sctp_ifa *ifa, *nifa;
5865         struct sctpvtaghead *chain;
5866         struct sctp_tagblock *twait_block, *prev_twait_block;
5867         struct sctp_laddr *wi, *nwi;
5868         int i;
5869         struct sctp_iterator *it, *nit;
5870
5871         /*
5872          * In FreeBSD the iterator thread never exits but we do clean up.
5873          * The only way FreeBSD reaches here is if we have VRF's but we
5874          * still add the ifdef to make it compile on old versions.
5875          */
5876         SCTP_IPI_ITERATOR_WQ_LOCK();
5877         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5878                 if (it->vn != curvnet) {
5879                         continue;
5880                 }
5881                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5882                 if (it->function_atend != NULL) {
5883                         (*it->function_atend) (it->pointer, it->val);
5884                 }
5885                 SCTP_FREE(it, SCTP_M_ITER);
5886         }
5887         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5888         SCTP_ITERATOR_LOCK();
5889         if ((sctp_it_ctl.cur_it) &&
5890             (sctp_it_ctl.cur_it->vn == curvnet)) {
5891                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5892         }
5893         SCTP_ITERATOR_UNLOCK();
5894         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5895         SCTP_WQ_ADDR_LOCK();
5896         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5897                 LIST_REMOVE(wi, sctp_nxt_addr);
5898                 SCTP_DECR_LADDR_COUNT();
5899                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5900         }
5901         SCTP_WQ_ADDR_UNLOCK();
5902
5903         /*
5904          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5905          * destroyed first).
5906          */
5907         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5908         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5909                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5910                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5911                                 /* free the ifa */
5912                                 LIST_REMOVE(ifa, next_bucket);
5913                                 LIST_REMOVE(ifa, next_ifa);
5914                                 SCTP_FREE(ifa, SCTP_M_IFA);
5915                         }
5916                         /* free the ifn */
5917                         LIST_REMOVE(ifn, next_bucket);
5918                         LIST_REMOVE(ifn, next_ifn);
5919                         SCTP_FREE(ifn, SCTP_M_IFN);
5920                 }
5921                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5922                 /* free the vrf */
5923                 LIST_REMOVE(vrf, next_vrf);
5924                 SCTP_FREE(vrf, SCTP_M_VRF);
5925         }
5926         /* free the vrf hashes */
5927         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5928         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5929
5930         /*
5931          * free the TIMEWAIT list elements malloc'd in the function
5932          * sctp_add_vtag_to_timewait()...
5933          */
5934         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5935                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5936                 if (!LIST_EMPTY(chain)) {
5937                         prev_twait_block = NULL;
5938                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5939                                 if (prev_twait_block) {
5940                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5941                                 }
5942                                 prev_twait_block = twait_block;
5943                         }
5944                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5945                 }
5946         }
5947
5948         /* free the locks and mutexes */
5949 #ifdef SCTP_PACKET_LOGGING
5950         SCTP_IP_PKTLOG_DESTROY();
5951 #endif
5952         SCTP_IPI_ADDR_DESTROY();
5953         SCTP_STATLOG_DESTROY();
5954         SCTP_INP_INFO_LOCK_DESTROY();
5955
5956         SCTP_WQ_ADDR_DESTROY();
5957
5958         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5959         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5960         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5961         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5962         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5963         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5964         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5965         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5966         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5967         /* Get rid of other stuff to */
5968         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5969                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5970         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5971                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5972         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5973                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5974 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5975         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
5976 #endif
5977 }
5978
5979
5980 int
5981 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5982     int offset, int limit,
5983     struct sockaddr *src, struct sockaddr *dst,
5984     struct sockaddr *altsa)
5985 {
5986         /*
5987          * grub through the INIT pulling addresses and loading them to the
5988          * nets structure in the asoc. The from address in the mbuf should
5989          * also be loaded (if it is not already). This routine can be called
5990          * with either INIT or INIT-ACK's as long as the m points to the IP
5991          * packet and the offset points to the beginning of the parameters.
5992          */
5993         struct sctp_inpcb *inp;
5994         struct sctp_nets *net, *nnet, *net_tmp;
5995         struct sctp_paramhdr *phdr, parm_buf;
5996         struct sctp_tcb *stcb_tmp;
5997         uint16_t ptype, plen;
5998         struct sockaddr *sa;
5999         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6000         struct sctp_auth_random *p_random = NULL;
6001         uint16_t random_len = 0;
6002         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6003         struct sctp_auth_hmac_algo *hmacs = NULL;
6004         uint16_t hmacs_len = 0;
6005         uint8_t saw_asconf = 0;
6006         uint8_t saw_asconf_ack = 0;
6007         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6008         struct sctp_auth_chunk_list *chunks = NULL;
6009         uint16_t num_chunks = 0;
6010         sctp_key_t *new_key;
6011         uint32_t keylen;
6012         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6013         uint8_t ecn_allowed;
6014
6015 #ifdef INET
6016         struct sockaddr_in sin;
6017
6018 #endif
6019 #ifdef INET6
6020         struct sockaddr_in6 sin6;
6021
6022 #endif
6023
6024         /* First get the destination address setup too. */
6025 #ifdef INET
6026         memset(&sin, 0, sizeof(sin));
6027         sin.sin_family = AF_INET;
6028         sin.sin_len = sizeof(sin);
6029         sin.sin_port = stcb->rport;
6030 #endif
6031 #ifdef INET6
6032         memset(&sin6, 0, sizeof(sin6));
6033         sin6.sin6_family = AF_INET6;
6034         sin6.sin6_len = sizeof(struct sockaddr_in6);
6035         sin6.sin6_port = stcb->rport;
6036 #endif
6037         if (altsa) {
6038                 sa = altsa;
6039         } else {
6040                 sa = src;
6041         }
6042         /* Turn off ECN until we get through all params */
6043         ecn_allowed = 0;
6044         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6045                 /* mark all addresses that we have currently on the list */
6046                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6047         }
6048         /* does the source address already exist? if so skip it */
6049         inp = stcb->sctp_ep;
6050         atomic_add_int(&stcb->asoc.refcnt, 1);
6051         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6052         atomic_add_int(&stcb->asoc.refcnt, -1);
6053
6054         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6055                 /* we must add the source address */
6056                 /* no scope set here since we have a tcb already. */
6057                 switch (sa->sa_family) {
6058 #ifdef INET
6059                 case AF_INET:
6060                         if (stcb->asoc.scope.ipv4_addr_legal) {
6061                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6062                                         return (-1);
6063                                 }
6064                         }
6065                         break;
6066 #endif
6067 #ifdef INET6
6068                 case AF_INET6:
6069                         if (stcb->asoc.scope.ipv6_addr_legal) {
6070                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6071                                         return (-2);
6072                                 }
6073                         }
6074                         break;
6075 #endif
6076                 default:
6077                         break;
6078                 }
6079         } else {
6080                 if (net_tmp != NULL && stcb_tmp == stcb) {
6081                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6082                 } else if (stcb_tmp != stcb) {
6083                         /* It belongs to another association? */
6084                         if (stcb_tmp)
6085                                 SCTP_TCB_UNLOCK(stcb_tmp);
6086                         return (-3);
6087                 }
6088         }
6089         if (stcb->asoc.state == 0) {
6090                 /* the assoc was freed? */
6091                 return (-4);
6092         }
6093         /*
6094          * peer must explicitly turn this on. This may have been initialized
6095          * to be "on" in order to allow local addr changes while INIT's are
6096          * in flight.
6097          */
6098         stcb->asoc.peer_supports_asconf = 0;
6099         /* now we must go through each of the params. */
6100         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6101         while (phdr) {
6102                 ptype = ntohs(phdr->param_type);
6103                 plen = ntohs(phdr->param_length);
6104                 /*
6105                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6106                  * (uint32_t)ptype, (int)plen);
6107                  */
6108                 if (offset + plen > limit) {
6109                         break;
6110                 }
6111                 if (plen == 0) {
6112                         break;
6113                 }
6114 #ifdef INET
6115                 if (ptype == SCTP_IPV4_ADDRESS) {
6116                         if (stcb->asoc.scope.ipv4_addr_legal) {
6117                                 struct sctp_ipv4addr_param *p4, p4_buf;
6118
6119                                 /* ok get the v4 address and check/add */
6120                                 phdr = sctp_get_next_param(m, offset,
6121                                     (struct sctp_paramhdr *)&p4_buf,
6122                                     sizeof(p4_buf));
6123                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6124                                     phdr == NULL) {
6125                                         return (-5);
6126                                 }
6127                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6128                                 sin.sin_addr.s_addr = p4->addr;
6129                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6130                                         /* Skip multi-cast addresses */
6131                                         goto next_param;
6132                                 }
6133                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6134                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6135                                         goto next_param;
6136                                 }
6137                                 sa = (struct sockaddr *)&sin;
6138                                 inp = stcb->sctp_ep;
6139                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6140                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6141                                     dst, stcb);
6142                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6143
6144                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6145                                     inp == NULL) {
6146                                         /* we must add the source address */
6147                                         /*
6148                                          * no scope set since we have a tcb
6149                                          * already
6150                                          */
6151
6152                                         /*
6153                                          * we must validate the state again
6154                                          * here
6155                                          */
6156                         add_it_now:
6157                                         if (stcb->asoc.state == 0) {
6158                                                 /* the assoc was freed? */
6159                                                 return (-7);
6160                                         }
6161                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6162                                                 return (-8);
6163                                         }
6164                                 } else if (stcb_tmp == stcb) {
6165                                         if (stcb->asoc.state == 0) {
6166                                                 /* the assoc was freed? */
6167                                                 return (-10);
6168                                         }
6169                                         if (net != NULL) {
6170                                                 /* clear flag */
6171                                                 net->dest_state &=
6172                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6173                                         }
6174                                 } else {
6175                                         /*
6176                                          * strange, address is in another
6177                                          * assoc? straighten out locks.
6178                                          */
6179                                         if (stcb_tmp) {
6180                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6181                                                         /*
6182                                                          * in setup state we
6183                                                          * abort this guy
6184                                                          */
6185                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6186                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6187                                                         goto add_it_now;
6188                                                 }
6189                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6190                                         }
6191                                         if (stcb->asoc.state == 0) {
6192                                                 /* the assoc was freed? */
6193                                                 return (-12);
6194                                         }
6195                                         return (-13);
6196                                 }
6197                         }
6198                 } else
6199 #endif
6200 #ifdef INET6
6201                 if (ptype == SCTP_IPV6_ADDRESS) {
6202                         if (stcb->asoc.scope.ipv6_addr_legal) {
6203                                 /* ok get the v6 address and check/add */
6204                                 struct sctp_ipv6addr_param *p6, p6_buf;
6205
6206                                 phdr = sctp_get_next_param(m, offset,
6207                                     (struct sctp_paramhdr *)&p6_buf,
6208                                     sizeof(p6_buf));
6209                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6210                                     phdr == NULL) {
6211                                         return (-14);
6212                                 }
6213                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6214                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6215                                     sizeof(p6->addr));
6216                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6217                                         /* Skip multi-cast addresses */
6218                                         goto next_param;
6219                                 }
6220                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6221                                         /*
6222                                          * Link local make no sense without
6223                                          * scope
6224                                          */
6225                                         goto next_param;
6226                                 }
6227                                 sa = (struct sockaddr *)&sin6;
6228                                 inp = stcb->sctp_ep;
6229                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6230                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6231                                     dst, stcb);
6232                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6233                                 if (stcb_tmp == NULL &&
6234                                     (inp == stcb->sctp_ep || inp == NULL)) {
6235                                         /*
6236                                          * we must validate the state again
6237                                          * here
6238                                          */
6239                         add_it_now6:
6240                                         if (stcb->asoc.state == 0) {
6241                                                 /* the assoc was freed? */
6242                                                 return (-16);
6243                                         }
6244                                         /*
6245                                          * we must add the address, no scope
6246                                          * set
6247                                          */
6248                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6249                                                 return (-17);
6250                                         }
6251                                 } else if (stcb_tmp == stcb) {
6252                                         /*
6253                                          * we must validate the state again
6254                                          * here
6255                                          */
6256                                         if (stcb->asoc.state == 0) {
6257                                                 /* the assoc was freed? */
6258                                                 return (-19);
6259                                         }
6260                                         if (net != NULL) {
6261                                                 /* clear flag */
6262                                                 net->dest_state &=
6263                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6264                                         }
6265                                 } else {
6266                                         /*
6267                                          * strange, address is in another
6268                                          * assoc? straighten out locks.
6269                                          */
6270                                         if (stcb_tmp)
6271                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6272                                                         /*
6273                                                          * in setup state we
6274                                                          * abort this guy
6275                                                          */
6276                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6277                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6278                                                         goto add_it_now6;
6279                                                 }
6280                                         SCTP_TCB_UNLOCK(stcb_tmp);
6281
6282                                         if (stcb->asoc.state == 0) {
6283                                                 /* the assoc was freed? */
6284                                                 return (-21);
6285                                         }
6286                                         return (-22);
6287                                 }
6288                         }
6289                 } else
6290 #endif
6291                 if (ptype == SCTP_ECN_CAPABLE) {
6292                         ecn_allowed = 1;
6293                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6294                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6295                                 struct sctp_adaptation_layer_indication ai,
6296                                                                 *aip;
6297
6298                                 phdr = sctp_get_next_param(m, offset,
6299                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6300                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6301                                 if (aip) {
6302                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6303                                         stcb->asoc.adaptation_needed = 1;
6304                                 }
6305                         }
6306                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6307                         struct sctp_asconf_addr_param lstore, *fee;
6308                         int lptype;
6309                         struct sockaddr *lsa = NULL;
6310
6311 #ifdef INET
6312                         struct sctp_asconf_addrv4_param *fii;
6313
6314 #endif
6315
6316                         stcb->asoc.peer_supports_asconf = 1;
6317                         if (plen > sizeof(lstore)) {
6318                                 return (-23);
6319                         }
6320                         phdr = sctp_get_next_param(m, offset,
6321                             (struct sctp_paramhdr *)&lstore,
6322                             min(plen, sizeof(lstore)));
6323                         if (phdr == NULL) {
6324                                 return (-24);
6325                         }
6326                         fee = (struct sctp_asconf_addr_param *)phdr;
6327                         lptype = ntohs(fee->addrp.ph.param_type);
6328                         switch (lptype) {
6329 #ifdef INET
6330                         case SCTP_IPV4_ADDRESS:
6331                                 if (plen !=
6332                                     sizeof(struct sctp_asconf_addrv4_param)) {
6333                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6334                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6335                                             plen);
6336                                 } else {
6337                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6338                                         sin.sin_addr.s_addr = fii->addrp.addr;
6339                                         lsa = (struct sockaddr *)&sin;
6340                                 }
6341                                 break;
6342 #endif
6343 #ifdef INET6
6344                         case SCTP_IPV6_ADDRESS:
6345                                 if (plen !=
6346                                     sizeof(struct sctp_asconf_addr_param)) {
6347                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6348                                             (int)sizeof(struct sctp_asconf_addr_param),
6349                                             plen);
6350                                 } else {
6351                                         memcpy(sin6.sin6_addr.s6_addr,
6352                                             fee->addrp.addr,
6353                                             sizeof(fee->addrp.addr));
6354                                         lsa = (struct sockaddr *)&sin6;
6355                                 }
6356                                 break;
6357 #endif
6358                         default:
6359                                 break;
6360                         }
6361                         if (lsa) {
6362                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6363                         }
6364                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6365                         stcb->asoc.peer_supports_nat = 1;
6366                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6367                         /* Peer supports pr-sctp */
6368                         stcb->asoc.peer_supports_prsctp = 1;
6369                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6370                         /* A supported extension chunk */
6371                         struct sctp_supported_chunk_types_param *pr_supported;
6372                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6373                         int num_ent, i;
6374
6375                         phdr = sctp_get_next_param(m, offset,
6376                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6377                         if (phdr == NULL) {
6378                                 return (-25);
6379                         }
6380                         stcb->asoc.peer_supports_asconf = 0;
6381                         stcb->asoc.peer_supports_prsctp = 0;
6382                         stcb->asoc.peer_supports_pktdrop = 0;
6383                         stcb->asoc.peer_supports_strreset = 0;
6384                         stcb->asoc.peer_supports_nr_sack = 0;
6385                         stcb->asoc.peer_supports_auth = 0;
6386                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6387                         num_ent = plen - sizeof(struct sctp_paramhdr);
6388                         for (i = 0; i < num_ent; i++) {
6389                                 switch (pr_supported->chunk_types[i]) {
6390                                 case SCTP_ASCONF:
6391                                 case SCTP_ASCONF_ACK:
6392                                         stcb->asoc.peer_supports_asconf = 1;
6393                                         break;
6394                                 case SCTP_FORWARD_CUM_TSN:
6395                                         stcb->asoc.peer_supports_prsctp = 1;
6396                                         break;
6397                                 case SCTP_PACKET_DROPPED:
6398                                         stcb->asoc.peer_supports_pktdrop = 1;
6399                                         break;
6400                                 case SCTP_NR_SELECTIVE_ACK:
6401                                         stcb->asoc.peer_supports_nr_sack = 1;
6402                                         break;
6403                                 case SCTP_STREAM_RESET:
6404                                         stcb->asoc.peer_supports_strreset = 1;
6405                                         break;
6406                                 case SCTP_AUTHENTICATION:
6407                                         stcb->asoc.peer_supports_auth = 1;
6408                                         break;
6409                                 default:
6410                                         /* one I have not learned yet */
6411                                         break;
6412
6413                                 }
6414                         }
6415                 } else if (ptype == SCTP_RANDOM) {
6416                         if (plen > sizeof(random_store))
6417                                 break;
6418                         if (got_random) {
6419                                 /* already processed a RANDOM */
6420                                 goto next_param;
6421                         }
6422                         phdr = sctp_get_next_param(m, offset,
6423                             (struct sctp_paramhdr *)random_store,
6424                             min(sizeof(random_store), plen));
6425                         if (phdr == NULL)
6426                                 return (-26);
6427                         p_random = (struct sctp_auth_random *)phdr;
6428                         random_len = plen - sizeof(*p_random);
6429                         /* enforce the random length */
6430                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6431                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6432                                 return (-27);
6433                         }
6434                         got_random = 1;
6435                 } else if (ptype == SCTP_HMAC_LIST) {
6436                         int num_hmacs;
6437                         int i;
6438
6439                         if (plen > sizeof(hmacs_store))
6440                                 break;
6441                         if (got_hmacs) {
6442                                 /* already processed a HMAC list */
6443                                 goto next_param;
6444                         }
6445                         phdr = sctp_get_next_param(m, offset,
6446                             (struct sctp_paramhdr *)hmacs_store,
6447                             min(plen, sizeof(hmacs_store)));
6448                         if (phdr == NULL)
6449                                 return (-28);
6450                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6451                         hmacs_len = plen - sizeof(*hmacs);
6452                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6453                         /* validate the hmac list */
6454                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6455                                 return (-29);
6456                         }
6457                         if (stcb->asoc.peer_hmacs != NULL)
6458                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6459                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6460                         if (stcb->asoc.peer_hmacs != NULL) {
6461                                 for (i = 0; i < num_hmacs; i++) {
6462                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6463                                             ntohs(hmacs->hmac_ids[i]));
6464                                 }
6465                         }
6466                         got_hmacs = 1;
6467                 } else if (ptype == SCTP_CHUNK_LIST) {
6468                         int i;
6469
6470                         if (plen > sizeof(chunks_store))
6471                                 break;
6472                         if (got_chklist) {
6473                                 /* already processed a Chunks list */
6474                                 goto next_param;
6475                         }
6476                         phdr = sctp_get_next_param(m, offset,
6477                             (struct sctp_paramhdr *)chunks_store,
6478                             min(plen, sizeof(chunks_store)));
6479                         if (phdr == NULL)
6480                                 return (-30);
6481                         chunks = (struct sctp_auth_chunk_list *)phdr;
6482                         num_chunks = plen - sizeof(*chunks);
6483                         if (stcb->asoc.peer_auth_chunks != NULL)
6484                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6485                         else
6486                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6487                         for (i = 0; i < num_chunks; i++) {
6488                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6489                                     stcb->asoc.peer_auth_chunks);
6490                                 /* record asconf/asconf-ack if listed */
6491                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6492                                         saw_asconf = 1;
6493                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6494                                         saw_asconf_ack = 1;
6495
6496                         }
6497                         got_chklist = 1;
6498                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6499                             (ptype == SCTP_STATE_COOKIE) ||
6500                             (ptype == SCTP_UNRECOG_PARAM) ||
6501                             (ptype == SCTP_COOKIE_PRESERVE) ||
6502                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6503                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6504                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6505                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6506                     (ptype == SCTP_SUCCESS_REPORT)) {
6507                          /* don't care */ ;
6508                 } else {
6509                         if ((ptype & 0x8000) == 0x0000) {
6510                                 /*
6511                                  * must stop processing the rest of the
6512                                  * param's. Any report bits were handled
6513                                  * with the call to
6514                                  * sctp_arethere_unrecognized_parameters()
6515                                  * when the INIT or INIT-ACK was first seen.
6516                                  */
6517                                 break;
6518                         }
6519                 }
6520
6521 next_param:
6522                 offset += SCTP_SIZE32(plen);
6523                 if (offset >= limit) {
6524                         break;
6525                 }
6526                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6527                     sizeof(parm_buf));
6528         }
6529         /* Now check to see if we need to purge any addresses */
6530         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6531                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6532                     SCTP_ADDR_NOT_IN_ASSOC) {
6533                         /* This address has been removed from the asoc */
6534                         /* remove and free it */
6535                         stcb->asoc.numnets--;
6536                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6537                         sctp_free_remote_addr(net);
6538                         if (net == stcb->asoc.primary_destination) {
6539                                 stcb->asoc.primary_destination = NULL;
6540                                 sctp_select_primary_destination(stcb);
6541                         }
6542                 }
6543         }
6544         if (ecn_allowed == 0) {
6545                 stcb->asoc.ecn_allowed = 0;
6546         }
6547         /* validate authentication required parameters */
6548         if (got_random && got_hmacs) {
6549                 stcb->asoc.peer_supports_auth = 1;
6550         } else {
6551                 stcb->asoc.peer_supports_auth = 0;
6552         }
6553         if (!stcb->asoc.peer_supports_auth && got_chklist) {
6554                 /* peer does not support auth but sent a chunks list? */
6555                 return (-31);
6556         }
6557         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6558             !stcb->asoc.peer_supports_auth) {
6559                 /* peer supports asconf but not auth? */
6560                 return (-32);
6561         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6562             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6563                 return (-33);
6564         }
6565         /* concatenate the full random key */
6566         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6567         if (chunks != NULL) {
6568                 keylen += sizeof(*chunks) + num_chunks;
6569         }
6570         new_key = sctp_alloc_key(keylen);
6571         if (new_key != NULL) {
6572                 /* copy in the RANDOM */
6573                 if (p_random != NULL) {
6574                         keylen = sizeof(*p_random) + random_len;
6575                         bcopy(p_random, new_key->key, keylen);
6576                 }
6577                 /* append in the AUTH chunks */
6578                 if (chunks != NULL) {
6579                         bcopy(chunks, new_key->key + keylen,
6580                             sizeof(*chunks) + num_chunks);
6581                         keylen += sizeof(*chunks) + num_chunks;
6582                 }
6583                 /* append in the HMACs */
6584                 if (hmacs != NULL) {
6585                         bcopy(hmacs, new_key->key + keylen,
6586                             sizeof(*hmacs) + hmacs_len);
6587                 }
6588         } else {
6589                 /* failed to get memory for the key */
6590                 return (-34);
6591         }
6592         if (stcb->asoc.authinfo.peer_random != NULL)
6593                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6594         stcb->asoc.authinfo.peer_random = new_key;
6595         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6596         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6597
6598         return (0);
6599 }
6600
6601 int
6602 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6603     struct sctp_nets *net)
6604 {
6605         /* make sure the requested primary address exists in the assoc */
6606         if (net == NULL && sa)
6607                 net = sctp_findnet(stcb, sa);
6608
6609         if (net == NULL) {
6610                 /* didn't find the requested primary address! */
6611                 return (-1);
6612         } else {
6613                 /* set the primary address */
6614                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6615                         /* Must be confirmed, so queue to set */
6616                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6617                         return (0);
6618                 }
6619                 stcb->asoc.primary_destination = net;
6620                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6621                         sctp_free_remote_addr(stcb->asoc.alternate);
6622                         stcb->asoc.alternate = NULL;
6623                 }
6624                 net = TAILQ_FIRST(&stcb->asoc.nets);
6625                 if (net != stcb->asoc.primary_destination) {
6626                         /*
6627                          * first one on the list is NOT the primary
6628                          * sctp_cmpaddr() is much more efficient if the
6629                          * primary is the first on the list, make it so.
6630                          */
6631                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6632                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6633                 }
6634                 return (0);
6635         }
6636 }
6637
6638 int
6639 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6640 {
6641         /*
6642          * This function serves two purposes. It will see if a TAG can be
6643          * re-used and return 1 for yes it is ok and 0 for don't use that
6644          * tag. A secondary function it will do is purge out old tags that
6645          * can be removed.
6646          */
6647         struct sctpvtaghead *chain;
6648         struct sctp_tagblock *twait_block;
6649         struct sctpasochead *head;
6650         struct sctp_tcb *stcb;
6651         int i;
6652
6653         SCTP_INP_INFO_RLOCK();
6654         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6655             SCTP_BASE_INFO(hashasocmark))];
6656         if (head == NULL) {
6657                 /* invalid vtag */
6658                 goto skip_vtag_check;
6659         }
6660         LIST_FOREACH(stcb, head, sctp_asocs) {
6661                 /*
6662                  * We choose not to lock anything here. TCB's can't be
6663                  * removed since we have the read lock, so they can't be
6664                  * freed on us, same thing for the INP. I may be wrong with
6665                  * this assumption, but we will go with it for now :-)
6666                  */
6667                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6668                         continue;
6669                 }
6670                 if (stcb->asoc.my_vtag == tag) {
6671                         /* candidate */
6672                         if (stcb->rport != rport) {
6673                                 continue;
6674                         }
6675                         if (stcb->sctp_ep->sctp_lport != lport) {
6676                                 continue;
6677                         }
6678                         /* Its a used tag set */
6679                         SCTP_INP_INFO_RUNLOCK();
6680                         return (0);
6681                 }
6682         }
6683 skip_vtag_check:
6684
6685         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6686         /* Now what about timed wait ? */
6687         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6688                 /*
6689                  * Block(s) are present, lets see if we have this tag in the
6690                  * list
6691                  */
6692                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6693                         if (twait_block->vtag_block[i].v_tag == 0) {
6694                                 /* not used */
6695                                 continue;
6696                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6697                             now->tv_sec) {
6698                                 /* Audit expires this guy */
6699                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6700                                 twait_block->vtag_block[i].v_tag = 0;
6701                                 twait_block->vtag_block[i].lport = 0;
6702                                 twait_block->vtag_block[i].rport = 0;
6703                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6704                                     (twait_block->vtag_block[i].lport == lport) &&
6705                             (twait_block->vtag_block[i].rport == rport)) {
6706                                 /* Bad tag, sorry :< */
6707                                 SCTP_INP_INFO_RUNLOCK();
6708                                 return (0);
6709                         }
6710                 }
6711         }
6712         SCTP_INP_INFO_RUNLOCK();
6713         return (1);
6714 }
6715
6716 static void
6717 sctp_drain_mbufs(struct sctp_tcb *stcb)
6718 {
6719         /*
6720          * We must hunt this association for MBUF's past the cumack (i.e.
6721          * out of order data that we can renege on).
6722          */
6723         struct sctp_association *asoc;
6724         struct sctp_tmit_chunk *chk, *nchk;
6725         uint32_t cumulative_tsn_p1;
6726         struct sctp_queued_to_read *ctl, *nctl;
6727         int cnt, strmat;
6728         uint32_t gap, i;
6729         int fnd = 0;
6730
6731         /* We look for anything larger than the cum-ack + 1 */
6732
6733         asoc = &stcb->asoc;
6734         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6735                 /* none we can reneg on. */
6736                 return;
6737         }
6738         SCTP_STAT_INCR(sctps_protocol_drains_done);
6739         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6740         cnt = 0;
6741         /* First look in the re-assembly queue */
6742         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6743                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6744                         /* Yep it is above cum-ack */
6745                         cnt++;
6746                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6747                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6748                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6749                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6750                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6751                         if (chk->data) {
6752                                 sctp_m_freem(chk->data);
6753                                 chk->data = NULL;
6754                         }
6755                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6756                 }
6757         }
6758         /* Ok that was fun, now we will drain all the inbound streams? */
6759         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6760                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6761                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6762                                 /* Yep it is above cum-ack */
6763                                 cnt++;
6764                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6765                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6766                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6767                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6768                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6769                                 if (ctl->data) {
6770                                         sctp_m_freem(ctl->data);
6771                                         ctl->data = NULL;
6772                                 }
6773                                 sctp_free_remote_addr(ctl->whoFrom);
6774                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6775                                 SCTP_DECR_READQ_COUNT();
6776                         }
6777                 }
6778         }
6779         if (cnt) {
6780                 /* We must back down to see what the new highest is */
6781                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6782                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6783                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6784                                 asoc->highest_tsn_inside_map = i;
6785                                 fnd = 1;
6786                                 break;
6787                         }
6788                 }
6789                 if (!fnd) {
6790                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6791                 }
6792                 /*
6793                  * Question, should we go through the delivery queue? The
6794                  * only reason things are on here is the app not reading OR
6795                  * a p-d-api up. An attacker COULD send enough in to
6796                  * initiate the PD-API and then send a bunch of stuff to
6797                  * other streams... these would wind up on the delivery
6798                  * queue.. and then we would not get to them. But in order
6799                  * to do this I then have to back-track and un-deliver
6800                  * sequence numbers in streams.. el-yucko. I think for now
6801                  * we will NOT look at the delivery queue and leave it to be
6802                  * something to consider later. An alternative would be to
6803                  * abort the P-D-API with a notification and then deliver
6804                  * the data.... Or another method might be to keep track of
6805                  * how many times the situation occurs and if we see a
6806                  * possible attack underway just abort the association.
6807                  */
6808 #ifdef SCTP_DEBUG
6809                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6810 #endif
6811                 /*
6812                  * Now do we need to find a new
6813                  * asoc->highest_tsn_inside_map?
6814                  */
6815                 asoc->last_revoke_count = cnt;
6816                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6817                 /* sa_ignore NO_NULL_CHK */
6818                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6819                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6820         }
6821         /*
6822          * Another issue, in un-setting the TSN's in the mapping array we
6823          * DID NOT adjust the highest_tsn marker.  This will cause one of
6824          * two things to occur. It may cause us to do extra work in checking
6825          * for our mapping array movement. More importantly it may cause us
6826          * to SACK every datagram. This may not be a bad thing though since
6827          * we will recover once we get our cum-ack above and all this stuff
6828          * we dumped recovered.
6829          */
6830 }
6831
6832 void
6833 sctp_drain()
6834 {
6835         /*
6836          * We must walk the PCB lists for ALL associations here. The system
6837          * is LOW on MBUF's and needs help. This is where reneging will
6838          * occur. We really hope this does NOT happen!
6839          */
6840         VNET_ITERATOR_DECL(vnet_iter);
6841         VNET_LIST_RLOCK_NOSLEEP();
6842         VNET_FOREACH(vnet_iter) {
6843                 CURVNET_SET(vnet_iter);
6844                 struct sctp_inpcb *inp;
6845                 struct sctp_tcb *stcb;
6846
6847                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6848                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6849 #ifdef VIMAGE
6850                         continue;
6851 #else
6852                         return;
6853 #endif
6854                 }
6855                 SCTP_INP_INFO_RLOCK();
6856                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6857                         /* For each endpoint */
6858                         SCTP_INP_RLOCK(inp);
6859                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6860                                 /* For each association */
6861                                 SCTP_TCB_LOCK(stcb);
6862                                 sctp_drain_mbufs(stcb);
6863                                 SCTP_TCB_UNLOCK(stcb);
6864                         }
6865                         SCTP_INP_RUNLOCK(inp);
6866                 }
6867                 SCTP_INP_INFO_RUNLOCK();
6868                 CURVNET_RESTORE();
6869         }
6870         VNET_LIST_RUNLOCK_NOSLEEP();
6871 }
6872
6873 /*
6874  * start a new iterator
6875  * iterates through all endpoints and associations based on the pcb_state
6876  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6877  * assocs and "ef" (optional) is executed when the iterator completes.
6878  * "inpf" (optional) is executed for each new endpoint as it is being
6879  * iterated through. inpe (optional) is called when the inp completes
6880  * its way through all the stcbs.
6881  */
6882 int
6883 sctp_initiate_iterator(inp_func inpf,
6884     asoc_func af,
6885     inp_func inpe,
6886     uint32_t pcb_state,
6887     uint32_t pcb_features,
6888     uint32_t asoc_state,
6889     void *argp,
6890     uint32_t argi,
6891     end_func ef,
6892     struct sctp_inpcb *s_inp,
6893     uint8_t chunk_output_off)
6894 {
6895         struct sctp_iterator *it = NULL;
6896
6897         if (af == NULL) {
6898                 return (-1);
6899         }
6900         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6901             SCTP_M_ITER);
6902         if (it == NULL) {
6903                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6904                 return (ENOMEM);
6905         }
6906         memset(it, 0, sizeof(*it));
6907         it->function_assoc = af;
6908         it->function_inp = inpf;
6909         if (inpf)
6910                 it->done_current_ep = 0;
6911         else
6912                 it->done_current_ep = 1;
6913         it->function_atend = ef;
6914         it->pointer = argp;
6915         it->val = argi;
6916         it->pcb_flags = pcb_state;
6917         it->pcb_features = pcb_features;
6918         it->asoc_state = asoc_state;
6919         it->function_inp_end = inpe;
6920         it->no_chunk_output = chunk_output_off;
6921         it->vn = curvnet;
6922         if (s_inp) {
6923                 /* Assume lock is held here */
6924                 it->inp = s_inp;
6925                 SCTP_INP_INCR_REF(it->inp);
6926                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
6927         } else {
6928                 SCTP_INP_INFO_RLOCK();
6929                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
6930                 if (it->inp) {
6931                         SCTP_INP_INCR_REF(it->inp);
6932                 }
6933                 SCTP_INP_INFO_RUNLOCK();
6934                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
6935
6936         }
6937         SCTP_IPI_ITERATOR_WQ_LOCK();
6938
6939         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
6940         if (sctp_it_ctl.iterator_running == 0) {
6941                 sctp_wakeup_iterator();
6942         }
6943         SCTP_IPI_ITERATOR_WQ_UNLOCK();
6944         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
6945         return (0);
6946 }