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         bindall = 1;
2739         inp = (struct sctp_inpcb *)so->so_pcb;
2740         ip_inp = (struct inpcb *)so->so_pcb;
2741 #ifdef SCTP_DEBUG
2742         if (addr) {
2743                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2744                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2745                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2746                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2747         }
2748 #endif
2749         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2750                 /* already did a bind, subsequent binds NOT allowed ! */
2751                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2752                 return (EINVAL);
2753         }
2754 #ifdef INVARIANTS
2755         if (p == NULL)
2756                 panic("null proc/thread");
2757 #endif
2758         if (addr != NULL) {
2759                 switch (addr->sa_family) {
2760 #ifdef INET
2761                 case AF_INET:
2762                         {
2763                                 struct sockaddr_in *sin;
2764
2765                                 /* IPV6_V6ONLY socket? */
2766                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2767                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2768                                         return (EINVAL);
2769                                 }
2770                                 if (addr->sa_len != sizeof(*sin)) {
2771                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2772                                         return (EINVAL);
2773                                 }
2774                                 sin = (struct sockaddr_in *)addr;
2775                                 lport = sin->sin_port;
2776                                 /*
2777                                  * For LOOPBACK the prison_local_ip4() call
2778                                  * will transmute the ip address to the
2779                                  * proper value.
2780                                  */
2781                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2782                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2783                                         return (error);
2784                                 }
2785                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2786                                         bindall = 0;
2787                                 }
2788                                 break;
2789                         }
2790 #endif
2791 #ifdef INET6
2792                 case AF_INET6:
2793                         {
2794                                 /*
2795                                  * Only for pure IPv6 Address. (No IPv4
2796                                  * Mapped!)
2797                                  */
2798                                 struct sockaddr_in6 *sin6;
2799
2800                                 sin6 = (struct sockaddr_in6 *)addr;
2801
2802                                 if (addr->sa_len != sizeof(*sin6)) {
2803                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2804                                         return (EINVAL);
2805                                 }
2806                                 lport = sin6->sin6_port;
2807                                 /*
2808                                  * For LOOPBACK the prison_local_ip6() call
2809                                  * will transmute the ipv6 address to the
2810                                  * proper value.
2811                                  */
2812                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2813                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2814                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2815                                         return (error);
2816                                 }
2817                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2818                                         bindall = 0;
2819                                         /* KAME hack: embed scopeid */
2820                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2821                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2822                                                 return (EINVAL);
2823                                         }
2824                                 }
2825                                 /* this must be cleared for ifa_ifwithaddr() */
2826                                 sin6->sin6_scope_id = 0;
2827                                 break;
2828                         }
2829 #endif
2830                 default:
2831                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2832                         return (EAFNOSUPPORT);
2833                 }
2834         }
2835         SCTP_INP_INFO_WLOCK();
2836         SCTP_INP_WLOCK(inp);
2837         /* Setup a vrf_id to be the default for the non-bind-all case. */
2838         vrf_id = inp->def_vrf_id;
2839
2840         /* increase our count due to the unlock we do */
2841         SCTP_INP_INCR_REF(inp);
2842         if (lport) {
2843                 /*
2844                  * Did the caller specify a port? if so we must see if an ep
2845                  * already has this one bound.
2846                  */
2847                 /* got to be root to get at low ports */
2848                 if (ntohs(lport) < IPPORT_RESERVED) {
2849                         if (p && (error =
2850                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2851                             )) {
2852                                 SCTP_INP_DECR_REF(inp);
2853                                 SCTP_INP_WUNLOCK(inp);
2854                                 SCTP_INP_INFO_WUNLOCK();
2855                                 return (error);
2856                         }
2857                 }
2858                 SCTP_INP_WUNLOCK(inp);
2859                 if (bindall) {
2860                         vrf_id = inp->def_vrf_id;
2861                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2862                         if (inp_tmp != NULL) {
2863                                 /*
2864                                  * lock guy returned and lower count note
2865                                  * that we are not bound so inp_tmp should
2866                                  * NEVER be inp. And it is this inp
2867                                  * (inp_tmp) that gets the reference bump,
2868                                  * so we must lower it.
2869                                  */
2870                                 SCTP_INP_DECR_REF(inp_tmp);
2871                                 /* unlock info */
2872                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2873                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2874                                         /*
2875                                          * Ok, must be one-2-one and
2876                                          * allowing port re-use
2877                                          */
2878                                         port_reuse_active = 1;
2879                                         goto continue_anyway;
2880                                 }
2881                                 SCTP_INP_DECR_REF(inp);
2882                                 SCTP_INP_INFO_WUNLOCK();
2883                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2884                                 return (EADDRINUSE);
2885                         }
2886                 } else {
2887                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2888                         if (inp_tmp != NULL) {
2889                                 /*
2890                                  * lock guy returned and lower count note
2891                                  * that we are not bound so inp_tmp should
2892                                  * NEVER be inp. And it is this inp
2893                                  * (inp_tmp) that gets the reference bump,
2894                                  * so we must lower it.
2895                                  */
2896                                 SCTP_INP_DECR_REF(inp_tmp);
2897                                 /* unlock info */
2898                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2899                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2900                                         /*
2901                                          * Ok, must be one-2-one and
2902                                          * allowing port re-use
2903                                          */
2904                                         port_reuse_active = 1;
2905                                         goto continue_anyway;
2906                                 }
2907                                 SCTP_INP_DECR_REF(inp);
2908                                 SCTP_INP_INFO_WUNLOCK();
2909                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2910                                 return (EADDRINUSE);
2911                         }
2912                 }
2913 continue_anyway:
2914                 SCTP_INP_WLOCK(inp);
2915                 if (bindall) {
2916                         /* verify that no lport is not used by a singleton */
2917                         if ((port_reuse_active == 0) &&
2918                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
2919                                 /* Sorry someone already has this one bound */
2920                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2921                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2922                                         port_reuse_active = 1;
2923                                 } else {
2924                                         SCTP_INP_DECR_REF(inp);
2925                                         SCTP_INP_WUNLOCK(inp);
2926                                         SCTP_INP_INFO_WUNLOCK();
2927                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2928                                         return (EADDRINUSE);
2929                                 }
2930                         }
2931                 }
2932         } else {
2933                 uint16_t first, last, candidate;
2934                 uint16_t count;
2935                 int done;
2936
2937                 if (ip_inp->inp_flags & INP_HIGHPORT) {
2938                         first = MODULE_GLOBAL(ipport_hifirstauto);
2939                         last = MODULE_GLOBAL(ipport_hilastauto);
2940                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2941                         if (p && (error =
2942                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2943                             )) {
2944                                 SCTP_INP_DECR_REF(inp);
2945                                 SCTP_INP_WUNLOCK(inp);
2946                                 SCTP_INP_INFO_WUNLOCK();
2947                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2948                                 return (error);
2949                         }
2950                         first = MODULE_GLOBAL(ipport_lowfirstauto);
2951                         last = MODULE_GLOBAL(ipport_lowlastauto);
2952                 } else {
2953                         first = MODULE_GLOBAL(ipport_firstauto);
2954                         last = MODULE_GLOBAL(ipport_lastauto);
2955                 }
2956                 if (first > last) {
2957                         uint16_t temp;
2958
2959                         temp = first;
2960                         first = last;
2961                         last = temp;
2962                 }
2963                 count = last - first + 1;       /* number of candidates */
2964                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2965
2966                 done = 0;
2967                 while (!done) {
2968                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
2969                                 done = 1;
2970                         }
2971                         if (!done) {
2972                                 if (--count == 0) {
2973                                         SCTP_INP_DECR_REF(inp);
2974                                         SCTP_INP_WUNLOCK(inp);
2975                                         SCTP_INP_INFO_WUNLOCK();
2976                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2977                                         return (EADDRINUSE);
2978                                 }
2979                                 if (candidate == last)
2980                                         candidate = first;
2981                                 else
2982                                         candidate = candidate + 1;
2983                         }
2984                 }
2985                 lport = htons(candidate);
2986         }
2987         SCTP_INP_DECR_REF(inp);
2988         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2989             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2990                 /*
2991                  * this really should not happen. The guy did a non-blocking
2992                  * bind and then did a close at the same time.
2993                  */
2994                 SCTP_INP_WUNLOCK(inp);
2995                 SCTP_INP_INFO_WUNLOCK();
2996                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2997                 return (EINVAL);
2998         }
2999         /* ok we look clear to give out this port, so lets setup the binding */
3000         if (bindall) {
3001                 /* binding to all addresses, so just set in the proper flags */
3002                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3003                 /* set the automatic addr changes from kernel flag */
3004                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3005                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3006                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3007                 } else {
3008                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3009                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3010                 }
3011                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3012                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3013                 } else {
3014                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3015                 }
3016                 /*
3017                  * set the automatic mobility_base from kernel flag (by
3018                  * micchie)
3019                  */
3020                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3021                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3022                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3023                 } else {
3024                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3025                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3026                 }
3027                 /*
3028                  * set the automatic mobility_fasthandoff from kernel flag
3029                  * (by micchie)
3030                  */
3031                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3032                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3033                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3034                 } else {
3035                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3036                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3037                 }
3038         } else {
3039                 /*
3040                  * bind specific, make sure flags is off and add a new
3041                  * address structure to the sctp_addr_list inside the ep
3042                  * structure.
3043                  *
3044                  * We will need to allocate one and insert it at the head. The
3045                  * socketopt call can just insert new addresses in there as
3046                  * well. It will also have to do the embed scope kame hack
3047                  * too (before adding).
3048                  */
3049                 struct sctp_ifa *ifa;
3050                 struct sockaddr_storage store_sa;
3051
3052                 memset(&store_sa, 0, sizeof(store_sa));
3053                 switch (addr->sa_family) {
3054 #ifdef INET
3055                 case AF_INET:
3056                         {
3057                                 struct sockaddr_in *sin;
3058
3059                                 sin = (struct sockaddr_in *)&store_sa;
3060                                 memcpy(sin, addr, sizeof(struct sockaddr_in));
3061                                 sin->sin_port = 0;
3062                                 break;
3063                         }
3064 #endif
3065 #ifdef INET6
3066                 case AF_INET6:
3067                         {
3068                                 struct sockaddr_in6 *sin6;
3069
3070                                 sin6 = (struct sockaddr_in6 *)&store_sa;
3071                                 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3072                                 sin6->sin6_port = 0;
3073                                 break;
3074                         }
3075 #endif
3076                 default:
3077                         break;
3078                 }
3079                 /*
3080                  * first find the interface with the bound address need to
3081                  * zero out the port to find the address! yuck! can't do
3082                  * this earlier since need port for sctp_pcb_findep()
3083                  */
3084                 if (sctp_ifap != NULL) {
3085                         ifa = sctp_ifap;
3086                 } else {
3087                         /*
3088                          * Note for BSD we hit here always other O/S's will
3089                          * pass things in via the sctp_ifap argument
3090                          * (Panda).
3091                          */
3092                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3093                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3094                 }
3095                 if (ifa == NULL) {
3096                         /* Can't find an interface with that address */
3097                         SCTP_INP_WUNLOCK(inp);
3098                         SCTP_INP_INFO_WUNLOCK();
3099                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3100                         return (EADDRNOTAVAIL);
3101                 }
3102 #ifdef INET6
3103                 if (addr->sa_family == AF_INET6) {
3104                         /* GAK, more FIXME IFA lock? */
3105                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3106                                 /* Can't bind a non-existent addr. */
3107                                 SCTP_INP_WUNLOCK(inp);
3108                                 SCTP_INP_INFO_WUNLOCK();
3109                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3110                                 return (EINVAL);
3111                         }
3112                 }
3113 #endif
3114                 /* we're not bound all */
3115                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3116                 /* allow bindx() to send ASCONF's for binding changes */
3117                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3118                 /* clear automatic addr changes from kernel flag */
3119                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3120
3121                 /* add this address to the endpoint list */
3122                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3123                 if (error != 0) {
3124                         SCTP_INP_WUNLOCK(inp);
3125                         SCTP_INP_INFO_WUNLOCK();
3126                         return (error);
3127                 }
3128                 inp->laddr_count++;
3129         }
3130         /* find the bucket */
3131         if (port_reuse_active) {
3132                 /* Put it into tcp 1-2-1 hash */
3133                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3134                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3135         } else {
3136                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3137         }
3138         /* put it in the bucket */
3139         LIST_INSERT_HEAD(head, inp, sctp_hash);
3140         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3141             (void *)head, ntohs(lport), port_reuse_active);
3142         /* set in the port */
3143         inp->sctp_lport = lport;
3144
3145         /* turn off just the unbound flag */
3146         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3147         SCTP_INP_WUNLOCK(inp);
3148         SCTP_INP_INFO_WUNLOCK();
3149         return (0);
3150 }
3151
3152
3153 static void
3154 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3155 {
3156         struct sctp_iterator *it, *nit;
3157
3158         /*
3159          * We enter with the only the ITERATOR_LOCK in place and a write
3160          * lock on the inp_info stuff.
3161          */
3162         it = sctp_it_ctl.cur_it;
3163         if (it && (it->vn != curvnet)) {
3164                 /* Its not looking at our VNET */
3165                 return;
3166         }
3167         if (it && (it->inp == inp)) {
3168                 /*
3169                  * This is tricky and we hold the iterator lock, but when it
3170                  * returns and gets the lock (when we release it) the
3171                  * iterator will try to operate on inp. We need to stop that
3172                  * from happening. But of course the iterator has a
3173                  * reference on the stcb and inp. We can mark it and it will
3174                  * stop.
3175                  *
3176                  * If its a single iterator situation, we set the end iterator
3177                  * flag. Otherwise we set the iterator to go to the next
3178                  * inp.
3179                  *
3180                  */
3181                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3182                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3183                 } else {
3184                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3185                 }
3186         }
3187         /*
3188          * Now go through and remove any single reference to our inp that
3189          * may be still pending on the list
3190          */
3191         SCTP_IPI_ITERATOR_WQ_LOCK();
3192         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3193                 if (it->vn != curvnet) {
3194                         continue;
3195                 }
3196                 if (it->inp == inp) {
3197                         /* This one points to me is it inp specific? */
3198                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3199                                 /* Remove and free this one */
3200                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3201                                     it, sctp_nxt_itr);
3202                                 if (it->function_atend != NULL) {
3203                                         (*it->function_atend) (it->pointer, it->val);
3204                                 }
3205                                 SCTP_FREE(it, SCTP_M_ITER);
3206                         } else {
3207                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3208                                 if (it->inp) {
3209                                         SCTP_INP_INCR_REF(it->inp);
3210                                 }
3211                         }
3212                         /*
3213                          * When its put in the refcnt is incremented so decr
3214                          * it
3215                          */
3216                         SCTP_INP_DECR_REF(inp);
3217                 }
3218         }
3219         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3220 }
3221
3222 /* release sctp_inpcb unbind the port */
3223 void
3224 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3225 {
3226         /*
3227          * Here we free a endpoint. We must find it (if it is in the Hash
3228          * table) and remove it from there. Then we must also find it in the
3229          * overall list and remove it from there. After all removals are
3230          * complete then any timer has to be stopped. Then start the actual
3231          * freeing. a) Any local lists. b) Any associations. c) The hash of
3232          * all associations. d) finally the ep itself.
3233          */
3234         struct sctp_tcb *asoc, *nasoc;
3235         struct sctp_laddr *laddr, *nladdr;
3236         struct inpcb *ip_pcb;
3237         struct socket *so;
3238         int being_refed = 0;
3239         struct sctp_queued_to_read *sq, *nsq;
3240         int cnt;
3241         sctp_sharedkey_t *shared_key, *nshared_key;
3242
3243
3244 #ifdef SCTP_LOG_CLOSING
3245         sctp_log_closing(inp, NULL, 0);
3246 #endif
3247         SCTP_ITERATOR_LOCK();
3248         /* mark any iterators on the list or being processed */
3249         sctp_iterator_inp_being_freed(inp);
3250         SCTP_ITERATOR_UNLOCK();
3251         so = inp->sctp_socket;
3252         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3253                 /* been here before.. eeks.. get out of here */
3254                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3255 #ifdef SCTP_LOG_CLOSING
3256                 sctp_log_closing(inp, NULL, 1);
3257 #endif
3258                 return;
3259         }
3260         SCTP_ASOC_CREATE_LOCK(inp);
3261         SCTP_INP_INFO_WLOCK();
3262
3263         SCTP_INP_WLOCK(inp);
3264         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3265                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3266                 /* socket is gone, so no more wakeups allowed */
3267                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3268                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3269                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3270
3271         }
3272         /* First time through we have the socket lock, after that no more. */
3273         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3274             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3275
3276         if (inp->control) {
3277                 sctp_m_freem(inp->control);
3278                 inp->control = NULL;
3279         }
3280         if (inp->pkt) {
3281                 sctp_m_freem(inp->pkt);
3282                 inp->pkt = NULL;
3283         }
3284         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3285                                          * here but I will be nice :> (i.e.
3286                                          * ip_pcb = ep;) */
3287         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3288                 int cnt_in_sd;
3289
3290                 cnt_in_sd = 0;
3291                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3292                         SCTP_TCB_LOCK(asoc);
3293                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3294                                 /* Skip guys being freed */
3295                                 cnt_in_sd++;
3296                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3297                                         /*
3298                                          * Special case - we did not start a
3299                                          * kill timer on the asoc due to it
3300                                          * was not closed. So go ahead and
3301                                          * start it now.
3302                                          */
3303                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3304                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3305                                 }
3306                                 SCTP_TCB_UNLOCK(asoc);
3307                                 continue;
3308                         }
3309                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3310                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3311                             (asoc->asoc.total_output_queue_size == 0)) {
3312                                 /*
3313                                  * If we have data in queue, we don't want
3314                                  * to just free since the app may have done,
3315                                  * send()/close or connect/send/close. And
3316                                  * it wants the data to get across first.
3317                                  */
3318                                 /* Just abandon things in the front states */
3319                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3320                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3321                                         cnt_in_sd++;
3322                                 }
3323                                 continue;
3324                         }
3325                         /* Disconnect the socket please */
3326                         asoc->sctp_socket = NULL;
3327                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3328                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3329                             (asoc->asoc.control_pdapi) ||
3330                             (asoc->asoc.size_on_all_streams > 0) ||
3331                             (so && (so->so_rcv.sb_cc > 0))) {
3332                                 /* Left with Data unread */
3333                                 struct mbuf *op_err;
3334
3335                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3336                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3337                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3338                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3339                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3340                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3341                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3342                                 }
3343                                 if (sctp_free_assoc(inp, asoc,
3344                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3345                                         cnt_in_sd++;
3346                                 }
3347                                 continue;
3348                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3349                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3350                             (asoc->asoc.stream_queue_cnt == 0)) {
3351                                 if (asoc->asoc.locked_on_sending) {
3352                                         goto abort_anyway;
3353                                 }
3354                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3355                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3356                                         struct sctp_nets *netp;
3357
3358                                         /*
3359                                          * there is nothing queued to send,
3360                                          * so I send shutdown
3361                                          */
3362                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3363                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3364                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3365                                         }
3366                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3367                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3368                                         sctp_stop_timers_for_shutdown(asoc);
3369                                         if (asoc->asoc.alternate) {
3370                                                 netp = asoc->asoc.alternate;
3371                                         } else {
3372                                                 netp = asoc->asoc.primary_destination;
3373                                         }
3374                                         sctp_send_shutdown(asoc, netp);
3375                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3376                                             netp);
3377                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3378                                             asoc->asoc.primary_destination);
3379                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3380                                 }
3381                         } else {
3382                                 /* mark into shutdown pending */
3383                                 struct sctp_stream_queue_pending *sp;
3384
3385                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3386                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3387                                     asoc->asoc.primary_destination);
3388                                 if (asoc->asoc.locked_on_sending) {
3389                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3390                                             sctp_streamhead);
3391                                         if (sp == NULL) {
3392                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3393                                                     (void *)asoc->asoc.locked_on_sending,
3394                                                     asoc->asoc.locked_on_sending->stream_no);
3395                                         } else {
3396                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3397                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3398                                         }
3399                                 }
3400                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3401                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3402                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3403                                         struct mbuf *op_err;
3404
3405                         abort_anyway:
3406                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3407                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3408                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3409                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3410                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3411                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3412                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3413                                         }
3414                                         if (sctp_free_assoc(inp, asoc,
3415                                             SCTP_PCBFREE_NOFORCE,
3416                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3417                                                 cnt_in_sd++;
3418                                         }
3419                                         continue;
3420                                 } else {
3421                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3422                                 }
3423                         }
3424                         cnt_in_sd++;
3425                         SCTP_TCB_UNLOCK(asoc);
3426                 }
3427                 /* now is there some left in our SHUTDOWN state? */
3428                 if (cnt_in_sd) {
3429 #ifdef SCTP_LOG_CLOSING
3430                         sctp_log_closing(inp, NULL, 2);
3431 #endif
3432                         inp->sctp_socket = NULL;
3433                         SCTP_INP_WUNLOCK(inp);
3434                         SCTP_ASOC_CREATE_UNLOCK(inp);
3435                         SCTP_INP_INFO_WUNLOCK();
3436                         return;
3437                 }
3438         }
3439         inp->sctp_socket = NULL;
3440         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3441             SCTP_PCB_FLAGS_UNBOUND) {
3442                 /*
3443                  * ok, this guy has been bound. It's port is somewhere in
3444                  * the SCTP_BASE_INFO(hash table). Remove it!
3445                  */
3446                 LIST_REMOVE(inp, sctp_hash);
3447                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3448         }
3449         /*
3450          * If there is a timer running to kill us, forget it, since it may
3451          * have a contest on the INP lock.. which would cause us to die ...
3452          */
3453         cnt = 0;
3454         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3455                 SCTP_TCB_LOCK(asoc);
3456                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3457                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3458                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3459                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3460                         }
3461                         cnt++;
3462                         SCTP_TCB_UNLOCK(asoc);
3463                         continue;
3464                 }
3465                 /* Free associations that are NOT killing us */
3466                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3467                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3468                         struct mbuf *op_err;
3469
3470                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3471                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3472                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3473                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3474                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3475                         cnt++;
3476                         SCTP_TCB_UNLOCK(asoc);
3477                         continue;
3478                 }
3479                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3480                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3481                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3482                 }
3483                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3484                         cnt++;
3485                 }
3486         }
3487         if (cnt) {
3488                 /* Ok we have someone out there that will kill us */
3489                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3490 #ifdef SCTP_LOG_CLOSING
3491                 sctp_log_closing(inp, NULL, 3);
3492 #endif
3493                 SCTP_INP_WUNLOCK(inp);
3494                 SCTP_ASOC_CREATE_UNLOCK(inp);
3495                 SCTP_INP_INFO_WUNLOCK();
3496                 return;
3497         }
3498         if (SCTP_INP_LOCK_CONTENDED(inp))
3499                 being_refed++;
3500         if (SCTP_INP_READ_CONTENDED(inp))
3501                 being_refed++;
3502         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3503                 being_refed++;
3504
3505         if ((inp->refcount) ||
3506             (being_refed) ||
3507             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3508                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3509 #ifdef SCTP_LOG_CLOSING
3510                 sctp_log_closing(inp, NULL, 4);
3511 #endif
3512                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3513                 SCTP_INP_WUNLOCK(inp);
3514                 SCTP_ASOC_CREATE_UNLOCK(inp);
3515                 SCTP_INP_INFO_WUNLOCK();
3516                 return;
3517         }
3518         inp->sctp_ep.signature_change.type = 0;
3519         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3520         /*
3521          * Remove it from the list .. last thing we need a lock for.
3522          */
3523         LIST_REMOVE(inp, sctp_list);
3524         SCTP_INP_WUNLOCK(inp);
3525         SCTP_ASOC_CREATE_UNLOCK(inp);
3526         SCTP_INP_INFO_WUNLOCK();
3527         /*
3528          * Now we release all locks. Since this INP cannot be found anymore
3529          * except possibly by the kill timer that might be running. We call
3530          * the drain function here. It should hit the case were it sees the
3531          * ACTIVE flag cleared and exit out freeing us to proceed and
3532          * destroy everything.
3533          */
3534         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3535                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3536         } else {
3537                 /* Probably un-needed */
3538                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3539         }
3540
3541 #ifdef SCTP_LOG_CLOSING
3542         sctp_log_closing(inp, NULL, 5);
3543 #endif
3544
3545
3546         if ((inp->sctp_asocidhash) != NULL) {
3547                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3548                 inp->sctp_asocidhash = NULL;
3549         }
3550         /* sa_ignore FREED_MEMORY */
3551         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3552                 /* Its only abandoned if it had data left */
3553                 if (sq->length)
3554                         SCTP_STAT_INCR(sctps_left_abandon);
3555
3556                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3557                 sctp_free_remote_addr(sq->whoFrom);
3558                 if (so)
3559                         so->so_rcv.sb_cc -= sq->length;
3560                 if (sq->data) {
3561                         sctp_m_freem(sq->data);
3562                         sq->data = NULL;
3563                 }
3564                 /*
3565                  * no need to free the net count, since at this point all
3566                  * assoc's are gone.
3567                  */
3568                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3569                 SCTP_DECR_READQ_COUNT();
3570         }
3571         /* Now the sctp_pcb things */
3572         /*
3573          * free each asoc if it is not already closed/free. we can't use the
3574          * macro here since le_next will get freed as part of the
3575          * sctp_free_assoc() call.
3576          */
3577         if (so) {
3578 #ifdef IPSEC
3579                 ipsec_delete_pcbpolicy(ip_pcb);
3580 #endif                          /* IPSEC */
3581
3582                 /* Unlocks not needed since the socket is gone now */
3583         }
3584         if (ip_pcb->inp_options) {
3585                 (void)sctp_m_free(ip_pcb->inp_options);
3586                 ip_pcb->inp_options = 0;
3587         }
3588 #ifdef INET6
3589         if (ip_pcb->inp_vflag & INP_IPV6) {
3590                 struct in6pcb *in6p;
3591
3592                 in6p = (struct in6pcb *)inp;
3593                 ip6_freepcbopts(in6p->in6p_outputopts);
3594         }
3595 #endif                          /* INET6 */
3596         ip_pcb->inp_vflag = 0;
3597         /* free up authentication fields */
3598         if (inp->sctp_ep.local_auth_chunks != NULL)
3599                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3600         if (inp->sctp_ep.local_hmacs != NULL)
3601                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3602
3603         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3604                 LIST_REMOVE(shared_key, next);
3605                 sctp_free_sharedkey(shared_key);
3606                 /* sa_ignore FREED_MEMORY */
3607         }
3608
3609         /*
3610          * if we have an address list the following will free the list of
3611          * ifaddr's that are set into this ep. Again macro limitations here,
3612          * since the LIST_FOREACH could be a bad idea.
3613          */
3614         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3615                 sctp_remove_laddr(laddr);
3616         }
3617
3618 #ifdef SCTP_TRACK_FREED_ASOCS
3619         /* TEMP CODE */
3620         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3621                 LIST_REMOVE(asoc, sctp_tcblist);
3622                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3623                 SCTP_DECR_ASOC_COUNT();
3624         }
3625         /* *** END TEMP CODE *** */
3626 #endif
3627         /* Now lets see about freeing the EP hash table. */
3628         if (inp->sctp_tcbhash != NULL) {
3629                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3630                 inp->sctp_tcbhash = NULL;
3631         }
3632         /* Now we must put the ep memory back into the zone pool */
3633         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3634         SCTP_INP_LOCK_DESTROY(inp);
3635         SCTP_INP_READ_DESTROY(inp);
3636         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3637         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3638         SCTP_DECR_EP_COUNT();
3639 }
3640
3641
3642 struct sctp_nets *
3643 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3644 {
3645         struct sctp_nets *net;
3646
3647         /* locate the address */
3648         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3649                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3650                         return (net);
3651         }
3652         return (NULL);
3653 }
3654
3655
3656 int
3657 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3658 {
3659         struct sctp_ifa *sctp_ifa;
3660
3661         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3662         if (sctp_ifa) {
3663                 return (1);
3664         } else {
3665                 return (0);
3666         }
3667 }
3668
3669 /*
3670  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3671  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3672  * stats of stuff.
3673  */
3674 int
3675 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3676     struct sctp_nets **netp, int set_scope, int from)
3677 {
3678         /*
3679          * The following is redundant to the same lines in the
3680          * sctp_aloc_assoc() but is needed since others call the add address
3681          * function
3682          */
3683         struct sctp_nets *net, *netfirst;
3684         int addr_inscope;
3685
3686         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3687             from);
3688         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3689
3690         netfirst = sctp_findnet(stcb, newaddr);
3691         if (netfirst) {
3692                 /*
3693                  * Lie and return ok, we don't want to make the association
3694                  * go away for this behavior. It will happen in the TCP
3695                  * model in a connected socket. It does not reach the hash
3696                  * table until after the association is built so it can't be
3697                  * found. Mark as reachable, since the initial creation will
3698                  * have been cleared and the NOT_IN_ASSOC flag will have
3699                  * been added... and we don't want to end up removing it
3700                  * back out.
3701                  */
3702                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3703                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3704                             SCTP_ADDR_UNCONFIRMED);
3705                 } else {
3706                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3707                 }
3708
3709                 return (0);
3710         }
3711         addr_inscope = 1;
3712         switch (newaddr->sa_family) {
3713 #ifdef INET
3714         case AF_INET:
3715                 {
3716                         struct sockaddr_in *sin;
3717
3718                         sin = (struct sockaddr_in *)newaddr;
3719                         if (sin->sin_addr.s_addr == 0) {
3720                                 /* Invalid address */
3721                                 return (-1);
3722                         }
3723                         /* zero out the bzero area */
3724                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3725
3726                         /* assure len is set */
3727                         sin->sin_len = sizeof(struct sockaddr_in);
3728                         if (set_scope) {
3729 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3730                                 stcb->asoc.scope.ipv4_local_scope = 1;
3731 #else
3732                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3733                                         stcb->asoc.scope.ipv4_local_scope = 1;
3734                                 }
3735 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3736                         } else {
3737                                 /* Validate the address is in scope */
3738                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3739                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3740                                         addr_inscope = 0;
3741                                 }
3742                         }
3743                         break;
3744                 }
3745 #endif
3746 #ifdef INET6
3747         case AF_INET6:
3748                 {
3749                         struct sockaddr_in6 *sin6;
3750
3751                         sin6 = (struct sockaddr_in6 *)newaddr;
3752                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3753                                 /* Invalid address */
3754                                 return (-1);
3755                         }
3756                         /* assure len is set */
3757                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3758                         if (set_scope) {
3759                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3760                                         stcb->asoc.scope.loopback_scope = 1;
3761                                         stcb->asoc.scope.local_scope = 0;
3762                                         stcb->asoc.scope.ipv4_local_scope = 1;
3763                                         stcb->asoc.scope.site_scope = 1;
3764                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3765                                         /*
3766                                          * If the new destination is a
3767                                          * LINK_LOCAL we must have common
3768                                          * site scope. Don't set the local
3769                                          * scope since we may not share all
3770                                          * links, only loopback can do this.
3771                                          * Links on the local network would
3772                                          * also be on our private network
3773                                          * for v4 too.
3774                                          */
3775                                         stcb->asoc.scope.ipv4_local_scope = 1;
3776                                         stcb->asoc.scope.site_scope = 1;
3777                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3778                                         /*
3779                                          * If the new destination is
3780                                          * SITE_LOCAL then we must have site
3781                                          * scope in common.
3782                                          */
3783                                         stcb->asoc.scope.site_scope = 1;
3784                                 }
3785                         } else {
3786                                 /* Validate the address is in scope */
3787                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3788                                     (stcb->asoc.scope.loopback_scope == 0)) {
3789                                         addr_inscope = 0;
3790                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3791                                     (stcb->asoc.scope.local_scope == 0)) {
3792                                         addr_inscope = 0;
3793                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3794                                     (stcb->asoc.scope.site_scope == 0)) {
3795                                         addr_inscope = 0;
3796                                 }
3797                         }
3798                         break;
3799                 }
3800 #endif
3801         default:
3802                 /* not supported family type */
3803                 return (-1);
3804         }
3805         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3806         if (net == NULL) {
3807                 return (-1);
3808         }
3809         SCTP_INCR_RADDR_COUNT();
3810         bzero(net, sizeof(struct sctp_nets));
3811         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3812         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3813         switch (newaddr->sa_family) {
3814 #ifdef INET
3815         case AF_INET:
3816                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3817                 break;
3818 #endif
3819 #ifdef INET6
3820         case AF_INET6:
3821                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3822                 break;
3823 #endif
3824         default:
3825                 break;
3826         }
3827         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3828         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3829                 stcb->asoc.scope.loopback_scope = 1;
3830                 stcb->asoc.scope.ipv4_local_scope = 1;
3831                 stcb->asoc.scope.local_scope = 0;
3832                 stcb->asoc.scope.site_scope = 1;
3833                 addr_inscope = 1;
3834         }
3835         net->failure_threshold = stcb->asoc.def_net_failure;
3836         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3837         if (addr_inscope == 0) {
3838                 net->dest_state = (SCTP_ADDR_REACHABLE |
3839                     SCTP_ADDR_OUT_OF_SCOPE);
3840         } else {
3841                 if (from == SCTP_ADDR_IS_CONFIRMED)
3842                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3843                         net->dest_state = SCTP_ADDR_REACHABLE;
3844                 else
3845                         net->dest_state = SCTP_ADDR_REACHABLE |
3846                             SCTP_ADDR_UNCONFIRMED;
3847         }
3848         /*
3849          * We set this to 0, the timer code knows that this means its an
3850          * initial value
3851          */
3852         net->rto_needed = 1;
3853         net->RTO = 0;
3854         net->RTO_measured = 0;
3855         stcb->asoc.numnets++;
3856         net->ref_count = 1;
3857         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3858         net->port = stcb->asoc.port;
3859         net->dscp = stcb->asoc.default_dscp;
3860 #ifdef INET6
3861         net->flowlabel = stcb->asoc.default_flowlabel;
3862 #endif
3863         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3864                 net->dest_state |= SCTP_ADDR_NOHB;
3865         } else {
3866                 net->dest_state &= ~SCTP_ADDR_NOHB;
3867         }
3868         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3869                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3870         } else {
3871                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3872         }
3873         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3874         /* Init the timer structure */
3875         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3876         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3877         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3878
3879         /* Now generate a route for this guy */
3880 #ifdef INET6
3881         /* KAME hack: embed scopeid */
3882         if (newaddr->sa_family == AF_INET6) {
3883                 struct sockaddr_in6 *sin6;
3884
3885                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3886                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3887                 sin6->sin6_scope_id = 0;
3888         }
3889 #endif
3890         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3891
3892         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3893                 /* Get source address */
3894                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3895                     stcb,
3896                     (sctp_route_t *) & net->ro,
3897                     net,
3898                     0,
3899                     stcb->asoc.vrf_id);
3900                 /* Now get the interface MTU */
3901                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3902                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3903                 }
3904                 if (net->mtu > 0) {
3905                         uint32_t rmtu;
3906
3907                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3908                         if (rmtu == 0) {
3909                                 /*
3910                                  * Start things off to match mtu of
3911                                  * interface please.
3912                                  */
3913                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3914                                     net->ro.ro_rt, net->mtu);
3915                         } else {
3916                                 /*
3917                                  * we take the route mtu over the interface,
3918                                  * since the route may be leading out the
3919                                  * loopback, or a different interface.
3920                                  */
3921                                 net->mtu = rmtu;
3922                         }
3923                 }
3924         }
3925         if (net->mtu == 0) {
3926                 switch (newaddr->sa_family) {
3927 #ifdef INET
3928                 case AF_INET:
3929                         net->mtu = SCTP_DEFAULT_MTU;
3930                         break;
3931 #endif
3932 #ifdef INET6
3933                 case AF_INET6:
3934                         net->mtu = 1280;
3935                         break;
3936 #endif
3937                 default:
3938                         break;
3939                 }
3940         }
3941         if (net->port) {
3942                 net->mtu -= (uint32_t) sizeof(struct udphdr);
3943         }
3944         if (from == SCTP_ALLOC_ASOC) {
3945                 stcb->asoc.smallest_mtu = net->mtu;
3946         }
3947         if (stcb->asoc.smallest_mtu > net->mtu) {
3948                 stcb->asoc.smallest_mtu = net->mtu;
3949         }
3950 #ifdef INET6
3951         if (newaddr->sa_family == AF_INET6) {
3952                 struct sockaddr_in6 *sin6;
3953
3954                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3955                 (void)sa6_recoverscope(sin6);
3956         }
3957 #endif
3958
3959         /* JRS - Use the congestion control given in the CC module */
3960         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
3961                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
3962
3963         /*
3964          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3965          * of assoc (2005/06/27, iyengar@cis.udel.edu)
3966          */
3967         net->find_pseudo_cumack = 1;
3968         net->find_rtx_pseudo_cumack = 1;
3969         net->src_addr_selected = 0;
3970         /* Choose an initial flowid. */
3971         net->flowid = stcb->asoc.my_vtag ^
3972             ntohs(stcb->rport) ^
3973             ntohs(stcb->sctp_ep->sctp_lport);
3974 #ifdef INVARIANTS
3975         net->flowidset = 1;
3976 #endif
3977         if (netp) {
3978                 *netp = net;
3979         }
3980         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3981         if (net->ro.ro_rt == NULL) {
3982                 /* Since we have no route put it at the back */
3983                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3984         } else if (netfirst == NULL) {
3985                 /* We are the first one in the pool. */
3986                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3987         } else if (netfirst->ro.ro_rt == NULL) {
3988                 /*
3989                  * First one has NO route. Place this one ahead of the first
3990                  * one.
3991                  */
3992                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3993         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
3994                 /*
3995                  * This one has a different interface than the one at the
3996                  * top of the list. Place it ahead.
3997                  */
3998                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3999         } else {
4000                 /*
4001                  * Ok we have the same interface as the first one. Move
4002                  * forward until we find either a) one with a NULL route...
4003                  * insert ahead of that b) one with a different ifp.. insert
4004                  * after that. c) end of the list.. insert at the tail.
4005                  */
4006                 struct sctp_nets *netlook;
4007
4008                 do {
4009                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4010                         if (netlook == NULL) {
4011                                 /* End of the list */
4012                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4013                                 break;
4014                         } else if (netlook->ro.ro_rt == NULL) {
4015                                 /* next one has NO route */
4016                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4017                                 break;
4018                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4019                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4020                                     net, sctp_next);
4021                                 break;
4022                         }
4023                         /* Shift forward */
4024                         netfirst = netlook;
4025                 } while (netlook != NULL);
4026         }
4027
4028         /* got to have a primary set */
4029         if (stcb->asoc.primary_destination == 0) {
4030                 stcb->asoc.primary_destination = net;
4031         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4032                     (net->ro.ro_rt) &&
4033             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4034                 /* No route to current primary adopt new primary */
4035                 stcb->asoc.primary_destination = net;
4036         }
4037         /* Validate primary is first */
4038         net = TAILQ_FIRST(&stcb->asoc.nets);
4039         if ((net != stcb->asoc.primary_destination) &&
4040             (stcb->asoc.primary_destination)) {
4041                 /*
4042                  * first one on the list is NOT the primary sctp_cmpaddr()
4043                  * is much more efficient if the primary is the first on the
4044                  * list, make it so.
4045                  */
4046                 TAILQ_REMOVE(&stcb->asoc.nets,
4047                     stcb->asoc.primary_destination, sctp_next);
4048                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4049                     stcb->asoc.primary_destination, sctp_next);
4050         }
4051         return (0);
4052 }
4053
4054
4055 static uint32_t
4056 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4057 {
4058         uint32_t id;
4059         struct sctpasochead *head;
4060         struct sctp_tcb *lstcb;
4061
4062         SCTP_INP_WLOCK(inp);
4063 try_again:
4064         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4065                 /* TSNH */
4066                 SCTP_INP_WUNLOCK(inp);
4067                 return (0);
4068         }
4069         /*
4070          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4071          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4072          */
4073         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4074                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4075         }
4076         id = inp->sctp_associd_counter;
4077         inp->sctp_associd_counter++;
4078         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4079         if (lstcb) {
4080                 goto try_again;
4081         }
4082         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4083         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4084         stcb->asoc.in_asocid_hash = 1;
4085         SCTP_INP_WUNLOCK(inp);
4086         return id;
4087 }
4088
4089 /*
4090  * allocate an association and add it to the endpoint. The caller must be
4091  * careful to add all additional addresses once they are know right away or
4092  * else the assoc will be may experience a blackout scenario.
4093  */
4094 struct sctp_tcb *
4095 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4096     int *error, uint32_t override_tag, uint32_t vrf_id,
4097     struct thread *p
4098 )
4099 {
4100         /* note the p argument is only valid in unbound sockets */
4101
4102         struct sctp_tcb *stcb;
4103         struct sctp_association *asoc;
4104         struct sctpasochead *head;
4105         uint16_t rport;
4106         int err;
4107
4108         /*
4109          * Assumption made here: Caller has done a
4110          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4111          * address does not exist already.
4112          */
4113         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4114                 /* Hit max assoc, sorry no more */
4115                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4116                 *error = ENOBUFS;
4117                 return (NULL);
4118         }
4119         if (firstaddr == NULL) {
4120                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4121                 *error = EINVAL;
4122                 return (NULL);
4123         }
4124         SCTP_INP_RLOCK(inp);
4125         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4126             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4127             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4128                 /*
4129                  * If its in the TCP pool, its NOT allowed to create an
4130                  * association. The parent listener needs to call
4131                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4132                  * off, or connected one does this.. its an error.
4133                  */
4134                 SCTP_INP_RUNLOCK(inp);
4135                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4136                 *error = EINVAL;
4137                 return (NULL);
4138         }
4139         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4140             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4141                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4142                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4143                         SCTP_INP_RUNLOCK(inp);
4144                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4145                         *error = EINVAL;
4146                         return (NULL);
4147                 }
4148         }
4149         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4150 #ifdef SCTP_DEBUG
4151         if (firstaddr) {
4152                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4153                 switch (firstaddr->sa_family) {
4154 #ifdef INET
4155                 case AF_INET:
4156                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4157                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4158                         break;
4159 #endif
4160 #ifdef INET6
4161                 case AF_INET6:
4162                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4163                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4164                         break;
4165 #endif
4166                 default:
4167                         break;
4168                 }
4169         } else {
4170                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4171         }
4172 #endif                          /* SCTP_DEBUG */
4173         switch (firstaddr->sa_family) {
4174 #ifdef INET
4175         case AF_INET:
4176                 {
4177                         struct sockaddr_in *sin;
4178
4179                         sin = (struct sockaddr_in *)firstaddr;
4180                         if ((ntohs(sin->sin_port) == 0) ||
4181                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4182                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4183                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4184                                 /* Invalid address */
4185                                 SCTP_INP_RUNLOCK(inp);
4186                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4187                                 *error = EINVAL;
4188                                 return (NULL);
4189                         }
4190                         rport = sin->sin_port;
4191                         break;
4192                 }
4193 #endif
4194 #ifdef INET6
4195         case AF_INET6:
4196                 {
4197                         struct sockaddr_in6 *sin6;
4198
4199                         sin6 = (struct sockaddr_in6 *)firstaddr;
4200                         if ((ntohs(sin6->sin6_port) == 0) ||
4201                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4202                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4203                                 /* Invalid address */
4204                                 SCTP_INP_RUNLOCK(inp);
4205                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4206                                 *error = EINVAL;
4207                                 return (NULL);
4208                         }
4209                         rport = sin6->sin6_port;
4210                         break;
4211                 }
4212 #endif
4213         default:
4214                 /* not supported family type */
4215                 SCTP_INP_RUNLOCK(inp);
4216                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4217                 *error = EINVAL;
4218                 return (NULL);
4219         }
4220         SCTP_INP_RUNLOCK(inp);
4221         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4222                 /*
4223                  * If you have not performed a bind, then we need to do the
4224                  * ephemeral bind for you.
4225                  */
4226                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4227                     (struct sockaddr *)NULL,
4228                     (struct sctp_ifa *)NULL,
4229                     p
4230                     ))) {
4231                         /* bind error, probably perm */
4232                         *error = err;
4233                         return (NULL);
4234                 }
4235         }
4236         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4237         if (stcb == NULL) {
4238                 /* out of memory? */
4239                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4240                 *error = ENOMEM;
4241                 return (NULL);
4242         }
4243         SCTP_INCR_ASOC_COUNT();
4244
4245         bzero(stcb, sizeof(*stcb));
4246         asoc = &stcb->asoc;
4247
4248         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4249         SCTP_TCB_LOCK_INIT(stcb);
4250         SCTP_TCB_SEND_LOCK_INIT(stcb);
4251         stcb->rport = rport;
4252         /* setup back pointer's */
4253         stcb->sctp_ep = inp;
4254         stcb->sctp_socket = inp->sctp_socket;
4255         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4256                 /* failed */
4257                 SCTP_TCB_LOCK_DESTROY(stcb);
4258                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4259                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4260                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4261                 SCTP_DECR_ASOC_COUNT();
4262                 *error = err;
4263                 return (NULL);
4264         }
4265         /* and the port */
4266         SCTP_INP_INFO_WLOCK();
4267         SCTP_INP_WLOCK(inp);
4268         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4269                 /* inpcb freed while alloc going on */
4270                 SCTP_TCB_LOCK_DESTROY(stcb);
4271                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4272                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4273                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4274                 SCTP_INP_WUNLOCK(inp);
4275                 SCTP_INP_INFO_WUNLOCK();
4276                 SCTP_DECR_ASOC_COUNT();
4277                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4278                 *error = EINVAL;
4279                 return (NULL);
4280         }
4281         SCTP_TCB_LOCK(stcb);
4282
4283         /* now that my_vtag is set, add it to the hash */
4284         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4285         /* put it in the bucket in the vtag hash of assoc's for the system */
4286         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4287         SCTP_INP_INFO_WUNLOCK();
4288
4289         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4290                 /* failure.. memory error? */
4291                 if (asoc->strmout) {
4292                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4293                         asoc->strmout = NULL;
4294                 }
4295                 if (asoc->mapping_array) {
4296                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4297                         asoc->mapping_array = NULL;
4298                 }
4299                 if (asoc->nr_mapping_array) {
4300                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4301                         asoc->nr_mapping_array = NULL;
4302                 }
4303                 SCTP_DECR_ASOC_COUNT();
4304                 SCTP_TCB_UNLOCK(stcb);
4305                 SCTP_TCB_LOCK_DESTROY(stcb);
4306                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4307                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4308                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4309                 SCTP_INP_WUNLOCK(inp);
4310                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4311                 *error = ENOBUFS;
4312                 return (NULL);
4313         }
4314         /* Init all the timers */
4315         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4316         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4317         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4318         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4319         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4320         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4321         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4322
4323         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4324         /* now file the port under the hash as well */
4325         if (inp->sctp_tcbhash != NULL) {
4326                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4327                     inp->sctp_hashmark)];
4328                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4329         }
4330         SCTP_INP_WUNLOCK(inp);
4331         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4332         return (stcb);
4333 }
4334
4335
4336 void
4337 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4338 {
4339         struct sctp_association *asoc;
4340
4341         asoc = &stcb->asoc;
4342         asoc->numnets--;
4343         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4344         if (net == asoc->primary_destination) {
4345                 /* Reset primary */
4346                 struct sctp_nets *lnet;
4347
4348                 lnet = TAILQ_FIRST(&asoc->nets);
4349                 /*
4350                  * Mobility adaptation Ideally, if deleted destination is
4351                  * the primary, it becomes a fast retransmission trigger by
4352                  * the subsequent SET PRIMARY. (by micchie)
4353                  */
4354                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4355                     SCTP_MOBILITY_BASE) ||
4356                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4357                     SCTP_MOBILITY_FASTHANDOFF)) {
4358                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4359                         if (asoc->deleted_primary != NULL) {
4360                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4361                                 goto out;
4362                         }
4363                         asoc->deleted_primary = net;
4364                         atomic_add_int(&net->ref_count, 1);
4365                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4366                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4367                         sctp_mobility_feature_on(stcb->sctp_ep,
4368                             SCTP_MOBILITY_PRIM_DELETED);
4369                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4370                             stcb->sctp_ep, stcb, NULL);
4371                 }
4372 out:
4373                 /* Try to find a confirmed primary */
4374                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4375         }
4376         if (net == asoc->last_data_chunk_from) {
4377                 /* Reset primary */
4378                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4379         }
4380         if (net == asoc->last_control_chunk_from) {
4381                 /* Clear net */
4382                 asoc->last_control_chunk_from = NULL;
4383         }
4384         if (net == stcb->asoc.alternate) {
4385                 sctp_free_remote_addr(stcb->asoc.alternate);
4386                 stcb->asoc.alternate = NULL;
4387         }
4388         sctp_free_remote_addr(net);
4389 }
4390
4391 /*
4392  * remove a remote endpoint address from an association, it will fail if the
4393  * address does not exist.
4394  */
4395 int
4396 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4397 {
4398         /*
4399          * Here we need to remove a remote address. This is quite simple, we
4400          * first find it in the list of address for the association
4401          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4402          * on that item. Note we do not allow it to be removed if there are
4403          * no other addresses.
4404          */
4405         struct sctp_association *asoc;
4406         struct sctp_nets *net, *nnet;
4407
4408         asoc = &stcb->asoc;
4409
4410         /* locate the address */
4411         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4412                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4413                         continue;
4414                 }
4415                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4416                     remaddr)) {
4417                         /* we found the guy */
4418                         if (asoc->numnets < 2) {
4419                                 /* Must have at LEAST two remote addresses */
4420                                 return (-1);
4421                         } else {
4422                                 sctp_remove_net(stcb, net);
4423                                 return (0);
4424                         }
4425                 }
4426         }
4427         /* not found. */
4428         return (-2);
4429 }
4430
4431 void
4432 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4433 {
4434         struct sctpvtaghead *chain;
4435         struct sctp_tagblock *twait_block;
4436         int found = 0;
4437         int i;
4438
4439         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4440         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4441                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4442                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4443                             (twait_block->vtag_block[i].lport == lport) &&
4444                             (twait_block->vtag_block[i].rport == rport)) {
4445                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4446                                 twait_block->vtag_block[i].v_tag = 0;
4447                                 twait_block->vtag_block[i].lport = 0;
4448                                 twait_block->vtag_block[i].rport = 0;
4449                                 found = 1;
4450                                 break;
4451                         }
4452                 }
4453                 if (found)
4454                         break;
4455         }
4456 }
4457
4458 int
4459 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4460 {
4461         struct sctpvtaghead *chain;
4462         struct sctp_tagblock *twait_block;
4463         int found = 0;
4464         int i;
4465
4466         SCTP_INP_INFO_WLOCK();
4467         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4468         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4469                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4470                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4471                             (twait_block->vtag_block[i].lport == lport) &&
4472                             (twait_block->vtag_block[i].rport == rport)) {
4473                                 found = 1;
4474                                 break;
4475                         }
4476                 }
4477                 if (found)
4478                         break;
4479         }
4480         SCTP_INP_INFO_WUNLOCK();
4481         return (found);
4482 }
4483
4484
4485 void
4486 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4487 {
4488         struct sctpvtaghead *chain;
4489         struct sctp_tagblock *twait_block;
4490         struct timeval now;
4491         int set, i;
4492
4493         if (time == 0) {
4494                 /* Its disabled */
4495                 return;
4496         }
4497         (void)SCTP_GETTIME_TIMEVAL(&now);
4498         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4499         set = 0;
4500         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4501                 /* Block(s) present, lets find space, and expire on the fly */
4502                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4503                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4504                             !set) {
4505                                 twait_block->vtag_block[i].tv_sec_at_expire =
4506                                     now.tv_sec + time;
4507                                 twait_block->vtag_block[i].v_tag = tag;
4508                                 twait_block->vtag_block[i].lport = lport;
4509                                 twait_block->vtag_block[i].rport = rport;
4510                                 set = 1;
4511                         } else if ((twait_block->vtag_block[i].v_tag) &&
4512                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4513                                 /* Audit expires this guy */
4514                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4515                                 twait_block->vtag_block[i].v_tag = 0;
4516                                 twait_block->vtag_block[i].lport = 0;
4517                                 twait_block->vtag_block[i].rport = 0;
4518                                 if (set == 0) {
4519                                         /* Reuse it for my new tag */
4520                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4521                                         twait_block->vtag_block[i].v_tag = tag;
4522                                         twait_block->vtag_block[i].lport = lport;
4523                                         twait_block->vtag_block[i].rport = rport;
4524                                         set = 1;
4525                                 }
4526                         }
4527                 }
4528                 if (set) {
4529                         /*
4530                          * We only do up to the block where we can place our
4531                          * tag for audits
4532                          */
4533                         break;
4534                 }
4535         }
4536         /* Need to add a new block to chain */
4537         if (!set) {
4538                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4539                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4540                 if (twait_block == NULL) {
4541 #ifdef INVARIANTS
4542                         panic("Can not alloc tagblock");
4543 #endif
4544                         return;
4545                 }
4546                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4547                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4548                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4549                 twait_block->vtag_block[0].v_tag = tag;
4550                 twait_block->vtag_block[0].lport = lport;
4551                 twait_block->vtag_block[0].rport = rport;
4552         }
4553 }
4554
4555
4556
4557 /*-
4558  * Free the association after un-hashing the remote port. This
4559  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4560  * expect that the input to this function IS a locked TCB.
4561  * It will return 0, if it did NOT destroy the association (instead
4562  * it unlocks it. It will return NON-zero if it either destroyed the
4563  * association OR the association is already destroyed.
4564  */
4565 int
4566 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4567 {
4568         int i;
4569         struct sctp_association *asoc;
4570         struct sctp_nets *net, *nnet;
4571         struct sctp_laddr *laddr, *naddr;
4572         struct sctp_tmit_chunk *chk, *nchk;
4573         struct sctp_asconf_addr *aparam, *naparam;
4574         struct sctp_asconf_ack *aack, *naack;
4575         struct sctp_stream_reset_list *strrst, *nstrrst;
4576         struct sctp_queued_to_read *sq, *nsq;
4577         struct sctp_stream_queue_pending *sp, *nsp;
4578         sctp_sharedkey_t *shared_key, *nshared_key;
4579         struct socket *so;
4580
4581         /* first, lets purge the entry from the hash table. */
4582
4583 #ifdef SCTP_LOG_CLOSING
4584         sctp_log_closing(inp, stcb, 6);
4585 #endif
4586         if (stcb->asoc.state == 0) {
4587 #ifdef SCTP_LOG_CLOSING
4588                 sctp_log_closing(inp, NULL, 7);
4589 #endif
4590                 /* there is no asoc, really TSNH :-0 */
4591                 return (1);
4592         }
4593         if (stcb->asoc.alternate) {
4594                 sctp_free_remote_addr(stcb->asoc.alternate);
4595                 stcb->asoc.alternate = NULL;
4596         }
4597         /* TEMP CODE */
4598         if (stcb->freed_from_where == 0) {
4599                 /* Only record the first place free happened from */
4600                 stcb->freed_from_where = from_location;
4601         }
4602         /* TEMP CODE */
4603
4604         asoc = &stcb->asoc;
4605         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4606             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4607                 /* nothing around */
4608                 so = NULL;
4609         else
4610                 so = inp->sctp_socket;
4611
4612         /*
4613          * We used timer based freeing if a reader or writer is in the way.
4614          * So we first check if we are actually being called from a timer,
4615          * if so we abort early if a reader or writer is still in the way.
4616          */
4617         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4618             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4619                 /*
4620                  * is it the timer driving us? if so are the reader/writers
4621                  * gone?
4622                  */
4623                 if (stcb->asoc.refcnt) {
4624                         /* nope, reader or writer in the way */
4625                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4626                         /* no asoc destroyed */
4627                         SCTP_TCB_UNLOCK(stcb);
4628 #ifdef SCTP_LOG_CLOSING
4629                         sctp_log_closing(inp, stcb, 8);
4630 #endif
4631                         return (0);
4632                 }
4633         }
4634         /* now clean up any other timers */
4635         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4636         asoc->dack_timer.self = NULL;
4637         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4638         /*-
4639          * For stream reset we don't blast this unless
4640          * it is a str-reset timer, it might be the
4641          * free-asoc timer which we DON'T want to
4642          * disturb.
4643          */
4644         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4645                 asoc->strreset_timer.self = NULL;
4646         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4647         asoc->asconf_timer.self = NULL;
4648         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4649         asoc->autoclose_timer.self = NULL;
4650         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4651         asoc->shut_guard_timer.self = NULL;
4652         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4653         asoc->delayed_event_timer.self = NULL;
4654         /* Mobility adaptation */
4655         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4656         asoc->delete_prim_timer.self = NULL;
4657         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4658                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4659                 net->rxt_timer.self = NULL;
4660                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4661                 net->pmtu_timer.self = NULL;
4662                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4663                 net->hb_timer.self = NULL;
4664         }
4665         /* Now the read queue needs to be cleaned up (only once) */
4666         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4667                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4668                 SCTP_INP_READ_LOCK(inp);
4669                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4670                         if (sq->stcb == stcb) {
4671                                 sq->do_not_ref_stcb = 1;
4672                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4673                                 /*
4674                                  * If there is no end, there never will be
4675                                  * now.
4676                                  */
4677                                 if (sq->end_added == 0) {
4678                                         /* Held for PD-API clear that. */
4679                                         sq->pdapi_aborted = 1;
4680                                         sq->held_length = 0;
4681                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4682                                                 /*
4683                                                  * Need to add a PD-API
4684                                                  * aborted indication.
4685                                                  * Setting the control_pdapi
4686                                                  * assures that it will be
4687                                                  * added right after this
4688                                                  * msg.
4689                                                  */
4690                                                 uint32_t strseq;
4691
4692                                                 stcb->asoc.control_pdapi = sq;
4693                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4694                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4695                                                     stcb,
4696                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4697                                                     (void *)&strseq,
4698                                                     SCTP_SO_LOCKED);
4699                                                 stcb->asoc.control_pdapi = NULL;
4700                                         }
4701                                 }
4702                                 /* Add an end to wake them */
4703                                 sq->end_added = 1;
4704                         }
4705                 }
4706                 SCTP_INP_READ_UNLOCK(inp);
4707                 if (stcb->block_entry) {
4708                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4709                         stcb->block_entry->error = ECONNRESET;
4710                         stcb->block_entry = NULL;
4711                 }
4712         }
4713         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4714                 /*
4715                  * Someone holds a reference OR the socket is unaccepted
4716                  * yet.
4717                  */
4718                 if ((stcb->asoc.refcnt) ||
4719                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4720                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4721                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4722                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4723                 }
4724                 SCTP_TCB_UNLOCK(stcb);
4725                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4726                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4727                         /* nothing around */
4728                         so = NULL;
4729                 if (so) {
4730                         /* Wake any reader/writers */
4731                         sctp_sorwakeup(inp, so);
4732                         sctp_sowwakeup(inp, so);
4733                 }
4734 #ifdef SCTP_LOG_CLOSING
4735                 sctp_log_closing(inp, stcb, 9);
4736 #endif
4737                 /* no asoc destroyed */
4738                 return (0);
4739         }
4740 #ifdef SCTP_LOG_CLOSING
4741         sctp_log_closing(inp, stcb, 10);
4742 #endif
4743         /*
4744          * When I reach here, no others want to kill the assoc yet.. and I
4745          * own the lock. Now its possible an abort comes in when I do the
4746          * lock exchange below to grab all the locks to do the final take
4747          * out. to prevent this we increment the count, which will start a
4748          * timer and blow out above thus assuring us that we hold exclusive
4749          * killing of the asoc. Note that after getting back the TCB lock we
4750          * will go ahead and increment the counter back up and stop any
4751          * timer a passing stranger may have started :-S
4752          */
4753         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4754                 atomic_add_int(&stcb->asoc.refcnt, 1);
4755
4756                 SCTP_TCB_UNLOCK(stcb);
4757                 SCTP_INP_INFO_WLOCK();
4758                 SCTP_INP_WLOCK(inp);
4759                 SCTP_TCB_LOCK(stcb);
4760         }
4761         /* Double check the GONE flag */
4762         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4763             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4764                 /* nothing around */
4765                 so = NULL;
4766
4767         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4768             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4769                 /*
4770                  * For TCP type we need special handling when we are
4771                  * connected. We also include the peel'ed off ones to.
4772                  */
4773                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4774                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4775                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4776                         if (so) {
4777                                 SOCK_LOCK(so);
4778                                 if (so->so_rcv.sb_cc == 0) {
4779                                         so->so_state &= ~(SS_ISCONNECTING |
4780                                             SS_ISDISCONNECTING |
4781                                             SS_ISCONFIRMING |
4782                                             SS_ISCONNECTED);
4783                                 }
4784                                 socantrcvmore_locked(so);
4785                                 sctp_sowwakeup(inp, so);
4786                                 sctp_sorwakeup(inp, so);
4787                                 SCTP_SOWAKEUP(so);
4788                         }
4789                 }
4790         }
4791         /*
4792          * Make it invalid too, that way if its about to run it will abort
4793          * and return.
4794          */
4795         /* re-increment the lock */
4796         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4797                 atomic_add_int(&stcb->asoc.refcnt, -1);
4798         }
4799         if (stcb->asoc.refcnt) {
4800                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4801                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4802                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4803                         SCTP_INP_INFO_WUNLOCK();
4804                         SCTP_INP_WUNLOCK(inp);
4805                 }
4806                 SCTP_TCB_UNLOCK(stcb);
4807                 return (0);
4808         }
4809         asoc->state = 0;
4810         if (inp->sctp_tcbhash) {
4811                 LIST_REMOVE(stcb, sctp_tcbhash);
4812         }
4813         if (stcb->asoc.in_asocid_hash) {
4814                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4815         }
4816         /* Now lets remove it from the list of ALL associations in the EP */
4817         LIST_REMOVE(stcb, sctp_tcblist);
4818         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4819                 SCTP_INP_INCR_REF(inp);
4820                 SCTP_INP_WUNLOCK(inp);
4821         }
4822         /* pull from vtag hash */
4823         LIST_REMOVE(stcb, sctp_asocs);
4824         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4825             inp->sctp_lport, stcb->rport);
4826
4827         /*
4828          * Now restop the timers to be sure this is paranoia at is finest!
4829          */
4830         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4831         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4832         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4833         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4834         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4835         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4836         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4837         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4838                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4839                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4840                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4841         }
4842
4843         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4844         /*
4845          * The chunk lists and such SHOULD be empty but we check them just
4846          * in case.
4847          */
4848         /* anything on the wheel needs to be removed */
4849         for (i = 0; i < asoc->streamoutcnt; i++) {
4850                 struct sctp_stream_out *outs;
4851
4852                 outs = &asoc->strmout[i];
4853                 /* now clean up any chunks here */
4854                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4855                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4856                         sctp_free_spbufspace(stcb, asoc, sp);
4857                         if (sp->data) {
4858                                 if (so) {
4859                                         /* Still an open socket - report */
4860                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4861                                             0, (void *)sp, SCTP_SO_LOCKED);
4862                                 }
4863                                 if (sp->data) {
4864                                         sctp_m_freem(sp->data);
4865                                         sp->data = NULL;
4866                                         sp->tail_mbuf = NULL;
4867                                         sp->length = 0;
4868                                 }
4869                         }
4870                         if (sp->net) {
4871                                 sctp_free_remote_addr(sp->net);
4872                                 sp->net = NULL;
4873                         }
4874                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4875                 }
4876         }
4877         /* sa_ignore FREED_MEMORY */
4878         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4879                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4880                 SCTP_FREE(strrst, SCTP_M_STRESET);
4881         }
4882         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4883                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4884                 if (sq->data) {
4885                         sctp_m_freem(sq->data);
4886                         sq->data = NULL;
4887                 }
4888                 sctp_free_remote_addr(sq->whoFrom);
4889                 sq->whoFrom = NULL;
4890                 sq->stcb = NULL;
4891                 /* Free the ctl entry */
4892                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4893                 SCTP_DECR_READQ_COUNT();
4894                 /* sa_ignore FREED_MEMORY */
4895         }
4896         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4897                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4898                 if (chk->data) {
4899                         sctp_m_freem(chk->data);
4900                         chk->data = NULL;
4901                 }
4902                 if (chk->holds_key_ref)
4903                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4904                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4905                 SCTP_DECR_CHK_COUNT();
4906                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4907                 asoc->free_chunk_cnt--;
4908                 /* sa_ignore FREED_MEMORY */
4909         }
4910         /* pending send queue SHOULD be empty */
4911         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4912                 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
4913                         asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
4914 #ifdef INVARIANTS
4915                 } else {
4916                         panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
4917 #endif
4918                 }
4919                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4920                 if (chk->data) {
4921                         if (so) {
4922                                 /* Still a socket? */
4923                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
4924                                     0, chk, SCTP_SO_LOCKED);
4925                         }
4926                         if (chk->data) {
4927                                 sctp_m_freem(chk->data);
4928                                 chk->data = NULL;
4929                         }
4930                 }
4931                 if (chk->holds_key_ref)
4932                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4933                 if (chk->whoTo) {
4934                         sctp_free_remote_addr(chk->whoTo);
4935                         chk->whoTo = NULL;
4936                 }
4937                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4938                 SCTP_DECR_CHK_COUNT();
4939                 /* sa_ignore FREED_MEMORY */
4940         }
4941         /* sent queue SHOULD be empty */
4942         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
4943                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
4944                         if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
4945                                 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
4946 #ifdef INVARIANTS
4947                         } else {
4948                                 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
4949 #endif
4950                         }
4951                 }
4952                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4953                 if (chk->data) {
4954                         if (so) {
4955                                 /* Still a socket? */
4956                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
4957                                     0, chk, SCTP_SO_LOCKED);
4958                         }
4959                         if (chk->data) {
4960                                 sctp_m_freem(chk->data);
4961                                 chk->data = NULL;
4962                         }
4963                 }
4964                 if (chk->holds_key_ref)
4965                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4966                 sctp_free_remote_addr(chk->whoTo);
4967                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4968                 SCTP_DECR_CHK_COUNT();
4969                 /* sa_ignore FREED_MEMORY */
4970         }
4971 #ifdef INVARIANTS
4972         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
4973                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
4974                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
4975                 }
4976         }
4977 #endif
4978         /* control queue MAY not be empty */
4979         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
4980                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4981                 if (chk->data) {
4982                         sctp_m_freem(chk->data);
4983                         chk->data = NULL;
4984                 }
4985                 if (chk->holds_key_ref)
4986                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4987                 sctp_free_remote_addr(chk->whoTo);
4988                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4989                 SCTP_DECR_CHK_COUNT();
4990                 /* sa_ignore FREED_MEMORY */
4991         }
4992         /* ASCONF queue MAY not be empty */
4993         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
4994                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
4995                 if (chk->data) {
4996                         sctp_m_freem(chk->data);
4997                         chk->data = NULL;
4998                 }
4999                 if (chk->holds_key_ref)
5000                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5001                 sctp_free_remote_addr(chk->whoTo);
5002                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5003                 SCTP_DECR_CHK_COUNT();
5004                 /* sa_ignore FREED_MEMORY */
5005         }
5006         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5007                 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5008                 if (chk->data) {
5009                         sctp_m_freem(chk->data);
5010                         chk->data = NULL;
5011                 }
5012                 if (chk->holds_key_ref)
5013                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5014                 sctp_free_remote_addr(chk->whoTo);
5015                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5016                 SCTP_DECR_CHK_COUNT();
5017                 /* sa_ignore FREED_MEMORY */
5018         }
5019
5020         if (asoc->mapping_array) {
5021                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5022                 asoc->mapping_array = NULL;
5023         }
5024         if (asoc->nr_mapping_array) {
5025                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5026                 asoc->nr_mapping_array = NULL;
5027         }
5028         /* the stream outs */
5029         if (asoc->strmout) {
5030                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5031                 asoc->strmout = NULL;
5032         }
5033         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5034         if (asoc->strmin) {
5035                 struct sctp_queued_to_read *ctl, *nctl;
5036
5037                 for (i = 0; i < asoc->streamincnt; i++) {
5038                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5039                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5040                                 sctp_free_remote_addr(ctl->whoFrom);
5041                                 if (ctl->data) {
5042                                         sctp_m_freem(ctl->data);
5043                                         ctl->data = NULL;
5044                                 }
5045                                 /*
5046                                  * We don't free the address here since all
5047                                  * the net's were freed above.
5048                                  */
5049                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5050                                 SCTP_DECR_READQ_COUNT();
5051                         }
5052                 }
5053                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5054                 asoc->strmin = NULL;
5055         }
5056         asoc->streamincnt = 0;
5057         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5058 #ifdef INVARIANTS
5059                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5060                         panic("no net's left alloc'ed, or list points to itself");
5061                 }
5062 #endif
5063                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5064                 sctp_free_remote_addr(net);
5065         }
5066         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5067                 /* sa_ignore FREED_MEMORY */
5068                 sctp_remove_laddr(laddr);
5069         }
5070
5071         /* pending asconf (address) parameters */
5072         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5073                 /* sa_ignore FREED_MEMORY */
5074                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5075                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5076         }
5077         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5078                 /* sa_ignore FREED_MEMORY */
5079                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5080                 if (aack->data != NULL) {
5081                         sctp_m_freem(aack->data);
5082                 }
5083                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5084         }
5085         /* clean up auth stuff */
5086         if (asoc->local_hmacs)
5087                 sctp_free_hmaclist(asoc->local_hmacs);
5088         if (asoc->peer_hmacs)
5089                 sctp_free_hmaclist(asoc->peer_hmacs);
5090
5091         if (asoc->local_auth_chunks)
5092                 sctp_free_chunklist(asoc->local_auth_chunks);
5093         if (asoc->peer_auth_chunks)
5094                 sctp_free_chunklist(asoc->peer_auth_chunks);
5095
5096         sctp_free_authinfo(&asoc->authinfo);
5097
5098         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5099                 LIST_REMOVE(shared_key, next);
5100                 sctp_free_sharedkey(shared_key);
5101                 /* sa_ignore FREED_MEMORY */
5102         }
5103
5104         /* Insert new items here :> */
5105
5106         /* Get rid of LOCK */
5107         SCTP_TCB_UNLOCK(stcb);
5108         SCTP_TCB_LOCK_DESTROY(stcb);
5109         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5110         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5111                 SCTP_INP_INFO_WUNLOCK();
5112                 SCTP_INP_RLOCK(inp);
5113         }
5114 #ifdef SCTP_TRACK_FREED_ASOCS
5115         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5116                 /* now clean up the tasoc itself */
5117                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5118                 SCTP_DECR_ASOC_COUNT();
5119         } else {
5120                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5121         }
5122 #else
5123         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5124         SCTP_DECR_ASOC_COUNT();
5125 #endif
5126         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5127                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5128                         /*
5129                          * If its NOT the inp_free calling us AND sctp_close
5130                          * as been called, we call back...
5131                          */
5132                         SCTP_INP_RUNLOCK(inp);
5133                         /*
5134                          * This will start the kill timer (if we are the
5135                          * last one) since we hold an increment yet. But
5136                          * this is the only safe way to do this since
5137                          * otherwise if the socket closes at the same time
5138                          * we are here we might collide in the cleanup.
5139                          */
5140                         sctp_inpcb_free(inp,
5141                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5142                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5143                         SCTP_INP_DECR_REF(inp);
5144                         goto out_of;
5145                 } else {
5146                         /* The socket is still open. */
5147                         SCTP_INP_DECR_REF(inp);
5148                 }
5149         }
5150         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5151                 SCTP_INP_RUNLOCK(inp);
5152         }
5153 out_of:
5154         /* destroyed the asoc */
5155 #ifdef SCTP_LOG_CLOSING
5156         sctp_log_closing(inp, NULL, 11);
5157 #endif
5158         return (1);
5159 }
5160
5161
5162
5163 /*
5164  * determine if a destination is "reachable" based upon the addresses bound
5165  * to the current endpoint (e.g. only v4 or v6 currently bound)
5166  */
5167 /*
5168  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5169  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5170  * types bound as its endpoint
5171  */
5172 int
5173 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5174 {
5175         struct sctp_inpcb *inp;
5176         int answer;
5177
5178         /*
5179          * No locks here, the TCB, in all cases is already locked and an
5180          * assoc is up. There is either a INP lock by the caller applied (in
5181          * asconf case when deleting an address) or NOT in the HB case,
5182          * however if HB then the INP increment is up and the INP will not
5183          * be removed (on top of the fact that we have a TCB lock). So we
5184          * only want to read the sctp_flags, which is either bound-all or
5185          * not.. no protection needed since once an assoc is up you can't be
5186          * changing your binding.
5187          */
5188         inp = stcb->sctp_ep;
5189         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5190                 /* if bound all, destination is not restricted */
5191                 /*
5192                  * RRS: Question during lock work: Is this correct? If you
5193                  * are bound-all you still might need to obey the V4--V6
5194                  * flags??? IMO this bound-all stuff needs to be removed!
5195                  */
5196                 return (1);
5197         }
5198         /* NOTE: all "scope" checks are done when local addresses are added */
5199         switch (destaddr->sa_family) {
5200 #ifdef INET6
5201         case AF_INET6:
5202                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5203                 break;
5204 #endif
5205 #ifdef INET
5206         case AF_INET:
5207                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5208                 break;
5209 #endif
5210         default:
5211                 /* invalid family, so it's unreachable */
5212                 answer = 0;
5213                 break;
5214         }
5215         return (answer);
5216 }
5217
5218 /*
5219  * update the inp_vflags on an endpoint
5220  */
5221 static void
5222 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5223 {
5224         struct sctp_laddr *laddr;
5225
5226         /* first clear the flag */
5227         inp->ip_inp.inp.inp_vflag = 0;
5228         /* set the flag based on addresses on the ep list */
5229         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5230                 if (laddr->ifa == NULL) {
5231                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5232                             __FUNCTION__);
5233                         continue;
5234                 }
5235                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5236                         continue;
5237                 }
5238                 switch (laddr->ifa->address.sa.sa_family) {
5239 #ifdef INET6
5240                 case AF_INET6:
5241                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5242                         break;
5243 #endif
5244 #ifdef INET
5245                 case AF_INET:
5246                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5247                         break;
5248 #endif
5249                 default:
5250                         break;
5251                 }
5252         }
5253 }
5254
5255 /*
5256  * Add the address to the endpoint local address list There is nothing to be
5257  * done if we are bound to all addresses
5258  */
5259 void
5260 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5261 {
5262         struct sctp_laddr *laddr;
5263         int fnd, error = 0;
5264
5265         fnd = 0;
5266
5267         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5268                 /* You are already bound to all. You have it already */
5269                 return;
5270         }
5271 #ifdef INET6
5272         if (ifa->address.sa.sa_family == AF_INET6) {
5273                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5274                         /* Can't bind a non-useable addr. */
5275                         return;
5276                 }
5277         }
5278 #endif
5279         /* first, is it already present? */
5280         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5281                 if (laddr->ifa == ifa) {
5282                         fnd = 1;
5283                         break;
5284                 }
5285         }
5286
5287         if (fnd == 0) {
5288                 /* Not in the ep list */
5289                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5290                 if (error != 0)
5291                         return;
5292                 inp->laddr_count++;
5293                 /* update inp_vflag flags */
5294                 switch (ifa->address.sa.sa_family) {
5295 #ifdef INET6
5296                 case AF_INET6:
5297                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5298                         break;
5299 #endif
5300 #ifdef INET
5301                 case AF_INET:
5302                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5303                         break;
5304 #endif
5305                 default:
5306                         break;
5307                 }
5308         }
5309         return;
5310 }
5311
5312
5313 /*
5314  * select a new (hopefully reachable) destination net (should only be used
5315  * when we deleted an ep addr that is the only usable source address to reach
5316  * the destination net)
5317  */
5318 static void
5319 sctp_select_primary_destination(struct sctp_tcb *stcb)
5320 {
5321         struct sctp_nets *net;
5322
5323         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5324                 /* for now, we'll just pick the first reachable one we find */
5325                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5326                         continue;
5327                 if (sctp_destination_is_reachable(stcb,
5328                     (struct sockaddr *)&net->ro._l_addr)) {
5329                         /* found a reachable destination */
5330                         stcb->asoc.primary_destination = net;
5331                 }
5332         }
5333         /* I can't there from here! ...we're gonna die shortly... */
5334 }
5335
5336
5337 /*
5338  * Delete the address from the endpoint local address list There is nothing
5339  * to be done if we are bound to all addresses
5340  */
5341 void
5342 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5343 {
5344         struct sctp_laddr *laddr;
5345         int fnd;
5346
5347         fnd = 0;
5348         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5349                 /* You are already bound to all. You have it already */
5350                 return;
5351         }
5352         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5353                 if (laddr->ifa == ifa) {
5354                         fnd = 1;
5355                         break;
5356                 }
5357         }
5358         if (fnd && (inp->laddr_count < 2)) {
5359                 /* can't delete unless there are at LEAST 2 addresses */
5360                 return;
5361         }
5362         if (fnd) {
5363                 /*
5364                  * clean up any use of this address go through our
5365                  * associations and clear any last_used_address that match
5366                  * this one for each assoc, see if a new primary_destination
5367                  * is needed
5368                  */
5369                 struct sctp_tcb *stcb;
5370
5371                 /* clean up "next_addr_touse" */
5372                 if (inp->next_addr_touse == laddr)
5373                         /* delete this address */
5374                         inp->next_addr_touse = NULL;
5375
5376                 /* clean up "last_used_address" */
5377                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5378                         struct sctp_nets *net;
5379
5380                         SCTP_TCB_LOCK(stcb);
5381                         if (stcb->asoc.last_used_address == laddr)
5382                                 /* delete this address */
5383                                 stcb->asoc.last_used_address = NULL;
5384                         /*
5385                          * Now spin through all the nets and purge any ref
5386                          * to laddr
5387                          */
5388                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5389                                 if (net->ro._s_addr &&
5390                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5391                                         /* Yep, purge src address selected */
5392                                         sctp_rtentry_t *rt;
5393
5394                                         /* delete this address if cached */
5395                                         rt = net->ro.ro_rt;
5396                                         if (rt != NULL) {
5397                                                 RTFREE(rt);
5398                                                 net->ro.ro_rt = NULL;
5399                                         }
5400                                         sctp_free_ifa(net->ro._s_addr);
5401                                         net->ro._s_addr = NULL;
5402                                         net->src_addr_selected = 0;
5403                                 }
5404                         }
5405                         SCTP_TCB_UNLOCK(stcb);
5406                 }               /* for each tcb */
5407                 /* remove it from the ep list */
5408                 sctp_remove_laddr(laddr);
5409                 inp->laddr_count--;
5410                 /* update inp_vflag flags */
5411                 sctp_update_ep_vflag(inp);
5412         }
5413         return;
5414 }
5415
5416 /*
5417  * Add the address to the TCB local address restricted list.
5418  * This is a "pending" address list (eg. addresses waiting for an
5419  * ASCONF-ACK response) and cannot be used as a valid source address.
5420  */
5421 void
5422 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5423 {
5424         struct sctp_laddr *laddr;
5425         struct sctpladdr *list;
5426
5427         /*
5428          * Assumes TCB is locked.. and possibly the INP. May need to
5429          * confirm/fix that if we need it and is not the case.
5430          */
5431         list = &stcb->asoc.sctp_restricted_addrs;
5432
5433 #ifdef INET6
5434         if (ifa->address.sa.sa_family == AF_INET6) {
5435                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5436                         /* Can't bind a non-existent addr. */
5437                         return;
5438                 }
5439         }
5440 #endif
5441         /* does the address already exist? */
5442         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5443                 if (laddr->ifa == ifa) {
5444                         return;
5445                 }
5446         }
5447
5448         /* add to the list */
5449         (void)sctp_insert_laddr(list, ifa, 0);
5450         return;
5451 }
5452
5453 /*
5454  * insert an laddr entry with the given ifa for the desired list
5455  */
5456 int
5457 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5458 {
5459         struct sctp_laddr *laddr;
5460
5461         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5462         if (laddr == NULL) {
5463                 /* out of memory? */
5464                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5465                 return (EINVAL);
5466         }
5467         SCTP_INCR_LADDR_COUNT();
5468         bzero(laddr, sizeof(*laddr));
5469         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5470         laddr->ifa = ifa;
5471         laddr->action = act;
5472         atomic_add_int(&ifa->refcount, 1);
5473         /* insert it */
5474         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5475
5476         return (0);
5477 }
5478
5479 /*
5480  * Remove an laddr entry from the local address list (on an assoc)
5481  */
5482 void
5483 sctp_remove_laddr(struct sctp_laddr *laddr)
5484 {
5485
5486         /* remove from the list */
5487         LIST_REMOVE(laddr, sctp_nxt_addr);
5488         sctp_free_ifa(laddr->ifa);
5489         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5490         SCTP_DECR_LADDR_COUNT();
5491 }
5492
5493 /*
5494  * Remove a local address from the TCB local address restricted list
5495  */
5496 void
5497 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5498 {
5499         struct sctp_inpcb *inp;
5500         struct sctp_laddr *laddr;
5501
5502         /*
5503          * This is called by asconf work. It is assumed that a) The TCB is
5504          * locked and b) The INP is locked. This is true in as much as I can
5505          * trace through the entry asconf code where I did these locks.
5506          * Again, the ASCONF code is a bit different in that it does lock
5507          * the INP during its work often times. This must be since we don't
5508          * want other proc's looking up things while what they are looking
5509          * up is changing :-D
5510          */
5511
5512         inp = stcb->sctp_ep;
5513         /* if subset bound and don't allow ASCONF's, can't delete last */
5514         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5515             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5516                 if (stcb->sctp_ep->laddr_count < 2) {
5517                         /* can't delete last address */
5518                         return;
5519                 }
5520         }
5521         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5522                 /* remove the address if it exists */
5523                 if (laddr->ifa == NULL)
5524                         continue;
5525                 if (laddr->ifa == ifa) {
5526                         sctp_remove_laddr(laddr);
5527                         return;
5528                 }
5529         }
5530
5531         /* address not found! */
5532         return;
5533 }
5534
5535 /*
5536  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5537  */
5538 /* sysctl */
5539 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5540 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5541
5542
5543
5544 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5545 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5546 int *sctp_cpuarry = NULL;
5547 void
5548 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5549 {
5550         /* Queue a packet to a processor for the specified core */
5551         struct sctp_mcore_queue *qent;
5552         struct sctp_mcore_ctrl *wkq;
5553         int need_wake = 0;
5554
5555         if (sctp_mcore_workers == NULL) {
5556                 /* Something went way bad during setup */
5557                 sctp_input_with_port(m, off, 0);
5558                 return;
5559         }
5560         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5561             (sizeof(struct sctp_mcore_queue)),
5562             SCTP_M_MCORE);
5563         if (qent == NULL) {
5564                 /* This is trouble  */
5565                 sctp_input_with_port(m, off, 0);
5566                 return;
5567         }
5568         qent->vn = curvnet;
5569         qent->m = m;
5570         qent->off = off;
5571         qent->v6 = 0;
5572         wkq = &sctp_mcore_workers[cpu_to_use];
5573         SCTP_MCORE_QLOCK(wkq);
5574
5575         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5576         if (wkq->running == 0) {
5577                 need_wake = 1;
5578         }
5579         SCTP_MCORE_QUNLOCK(wkq);
5580         if (need_wake) {
5581                 wakeup(&wkq->running);
5582         }
5583 }
5584
5585 static void
5586 sctp_mcore_thread(void *arg)
5587 {
5588
5589         struct sctp_mcore_ctrl *wkq;
5590         struct sctp_mcore_queue *qent;
5591
5592         wkq = (struct sctp_mcore_ctrl *)arg;
5593         struct mbuf *m;
5594         int off, v6;
5595
5596         /* Wait for first tickle */
5597         SCTP_MCORE_LOCK(wkq);
5598         wkq->running = 0;
5599         msleep(&wkq->running,
5600             &wkq->core_mtx,
5601             0, "wait for pkt", 0);
5602         SCTP_MCORE_UNLOCK(wkq);
5603
5604         /* Bind to our cpu */
5605         thread_lock(curthread);
5606         sched_bind(curthread, wkq->cpuid);
5607         thread_unlock(curthread);
5608
5609         /* Now lets start working */
5610         SCTP_MCORE_LOCK(wkq);
5611         /* Now grab lock and go */
5612         for (;;) {
5613                 SCTP_MCORE_QLOCK(wkq);
5614 skip_sleep:
5615                 wkq->running = 1;
5616                 qent = TAILQ_FIRST(&wkq->que);
5617                 if (qent) {
5618                         TAILQ_REMOVE(&wkq->que, qent, next);
5619                         SCTP_MCORE_QUNLOCK(wkq);
5620                         CURVNET_SET(qent->vn);
5621                         m = qent->m;
5622                         off = qent->off;
5623                         v6 = qent->v6;
5624                         SCTP_FREE(qent, SCTP_M_MCORE);
5625                         if (v6 == 0) {
5626                                 sctp_input_with_port(m, off, 0);
5627                         } else {
5628                                 SCTP_PRINTF("V6 not yet supported\n");
5629                                 sctp_m_freem(m);
5630                         }
5631                         CURVNET_RESTORE();
5632                         SCTP_MCORE_QLOCK(wkq);
5633                 }
5634                 wkq->running = 0;
5635                 if (!TAILQ_EMPTY(&wkq->que)) {
5636                         goto skip_sleep;
5637                 }
5638                 SCTP_MCORE_QUNLOCK(wkq);
5639                 msleep(&wkq->running,
5640                     &wkq->core_mtx,
5641                     0, "wait for pkt", 0);
5642         }
5643 }
5644
5645 static void
5646 sctp_startup_mcore_threads(void)
5647 {
5648         int i, cpu;
5649
5650         if (mp_ncpus == 1)
5651                 return;
5652
5653         if (sctp_mcore_workers != NULL) {
5654                 /*
5655                  * Already been here in some previous vnet?
5656                  */
5657                 return;
5658         }
5659         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5660             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5661             SCTP_M_MCORE);
5662         if (sctp_mcore_workers == NULL) {
5663                 /* TSNH I hope */
5664                 return;
5665         }
5666         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5667             sizeof(struct sctp_mcore_ctrl)));
5668         /* Init the structures */
5669         for (i = 0; i <= mp_maxid; i++) {
5670                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5671                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5672                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5673                 sctp_mcore_workers[i].cpuid = i;
5674         }
5675         if (sctp_cpuarry == NULL) {
5676                 SCTP_MALLOC(sctp_cpuarry, int *,
5677                     (mp_ncpus * sizeof(int)),
5678                     SCTP_M_MCORE);
5679                 i = 0;
5680                 CPU_FOREACH(cpu) {
5681                         sctp_cpuarry[i] = cpu;
5682                         i++;
5683                 }
5684         }
5685         /* Now start them all */
5686         CPU_FOREACH(cpu) {
5687                 (void)kproc_create(sctp_mcore_thread,
5688                     (void *)&sctp_mcore_workers[cpu],
5689                     &sctp_mcore_workers[cpu].thread_proc,
5690                     RFPROC,
5691                     SCTP_KTHREAD_PAGES,
5692                     SCTP_MCORE_NAME);
5693
5694         }
5695 }
5696
5697 #endif
5698
5699 void
5700 sctp_pcb_init()
5701 {
5702         /*
5703          * SCTP initialization for the PCB structures should be called by
5704          * the sctp_init() funciton.
5705          */
5706         int i;
5707         struct timeval tv;
5708
5709         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5710                 /* error I was called twice */
5711                 return;
5712         }
5713         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5714
5715 #if defined(SCTP_LOCAL_TRACE_BUF)
5716         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5717 #endif
5718 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5719         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5720             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5721             SCTP_M_MCORE);
5722 #endif
5723         (void)SCTP_GETTIME_TIMEVAL(&tv);
5724 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5725         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5726         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5727         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5728 #else
5729         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5730         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5731         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5732 #endif
5733         /* init the empty list of (All) Endpoints */
5734         LIST_INIT(&SCTP_BASE_INFO(listhead));
5735
5736
5737         /* init the hash table of endpoints */
5738         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5739         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5740         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5741         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5742             &SCTP_BASE_INFO(hashasocmark));
5743         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5744             &SCTP_BASE_INFO(hashmark));
5745         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5746             &SCTP_BASE_INFO(hashtcpmark));
5747         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5748
5749
5750         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5751             &SCTP_BASE_INFO(hashvrfmark));
5752
5753         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5754             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5755         /* init the zones */
5756         /*
5757          * FIX ME: Should check for NULL returns, but if it does fail we are
5758          * doomed to panic anyways... add later maybe.
5759          */
5760         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5761             sizeof(struct sctp_inpcb), maxsockets);
5762
5763         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5764             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5765
5766         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5767             sizeof(struct sctp_laddr),
5768             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5769
5770         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5771             sizeof(struct sctp_nets),
5772             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5773
5774         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5775             sizeof(struct sctp_tmit_chunk),
5776             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5777
5778         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5779             sizeof(struct sctp_queued_to_read),
5780             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5781
5782         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5783             sizeof(struct sctp_stream_queue_pending),
5784             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5785
5786         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5787             sizeof(struct sctp_asconf),
5788             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5789
5790         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5791             sizeof(struct sctp_asconf_ack),
5792             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5793
5794
5795         /* Master Lock INIT for info structure */
5796         SCTP_INP_INFO_LOCK_INIT();
5797         SCTP_STATLOG_INIT_LOCK();
5798
5799         SCTP_IPI_COUNT_INIT();
5800         SCTP_IPI_ADDR_INIT();
5801 #ifdef SCTP_PACKET_LOGGING
5802         SCTP_IP_PKTLOG_INIT();
5803 #endif
5804         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5805
5806         SCTP_WQ_ADDR_INIT();
5807         /* not sure if we need all the counts */
5808         SCTP_BASE_INFO(ipi_count_ep) = 0;
5809         /* assoc/tcb zone info */
5810         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5811         /* local addrlist zone info */
5812         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5813         /* remote addrlist zone info */
5814         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5815         /* chunk info */
5816         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5817
5818         /* socket queue zone info */
5819         SCTP_BASE_INFO(ipi_count_readq) = 0;
5820
5821         /* stream out queue cont */
5822         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5823
5824         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5825         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5826
5827         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5828
5829         /* Init the TIMEWAIT list */
5830         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5831                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5832         }
5833         sctp_startup_iterator();
5834
5835 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5836         sctp_startup_mcore_threads();
5837 #endif
5838
5839         /*
5840          * INIT the default VRF which for BSD is the only one, other O/S's
5841          * may have more. But initially they must start with one and then
5842          * add the VRF's as addresses are added.
5843          */
5844         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5845 }
5846
5847 /*
5848  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5849  */
5850 void
5851 sctp_pcb_finish(void)
5852 {
5853         struct sctp_vrflist *vrf_bucket;
5854         struct sctp_vrf *vrf, *nvrf;
5855         struct sctp_ifn *ifn, *nifn;
5856         struct sctp_ifa *ifa, *nifa;
5857         struct sctpvtaghead *chain;
5858         struct sctp_tagblock *twait_block, *prev_twait_block;
5859         struct sctp_laddr *wi, *nwi;
5860         int i;
5861         struct sctp_iterator *it, *nit;
5862
5863         /*
5864          * In FreeBSD the iterator thread never exits but we do clean up.
5865          * The only way FreeBSD reaches here is if we have VRF's but we
5866          * still add the ifdef to make it compile on old versions.
5867          */
5868         SCTP_IPI_ITERATOR_WQ_LOCK();
5869         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5870                 if (it->vn != curvnet) {
5871                         continue;
5872                 }
5873                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5874                 if (it->function_atend != NULL) {
5875                         (*it->function_atend) (it->pointer, it->val);
5876                 }
5877                 SCTP_FREE(it, SCTP_M_ITER);
5878         }
5879         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5880         SCTP_ITERATOR_LOCK();
5881         if ((sctp_it_ctl.cur_it) &&
5882             (sctp_it_ctl.cur_it->vn == curvnet)) {
5883                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5884         }
5885         SCTP_ITERATOR_UNLOCK();
5886         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5887         SCTP_WQ_ADDR_LOCK();
5888         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5889                 LIST_REMOVE(wi, sctp_nxt_addr);
5890                 SCTP_DECR_LADDR_COUNT();
5891                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5892         }
5893         SCTP_WQ_ADDR_UNLOCK();
5894
5895         /*
5896          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5897          * destroyed first).
5898          */
5899         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5900         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5901                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5902                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5903                                 /* free the ifa */
5904                                 LIST_REMOVE(ifa, next_bucket);
5905                                 LIST_REMOVE(ifa, next_ifa);
5906                                 SCTP_FREE(ifa, SCTP_M_IFA);
5907                         }
5908                         /* free the ifn */
5909                         LIST_REMOVE(ifn, next_bucket);
5910                         LIST_REMOVE(ifn, next_ifn);
5911                         SCTP_FREE(ifn, SCTP_M_IFN);
5912                 }
5913                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5914                 /* free the vrf */
5915                 LIST_REMOVE(vrf, next_vrf);
5916                 SCTP_FREE(vrf, SCTP_M_VRF);
5917         }
5918         /* free the vrf hashes */
5919         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5920         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5921
5922         /*
5923          * free the TIMEWAIT list elements malloc'd in the function
5924          * sctp_add_vtag_to_timewait()...
5925          */
5926         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5927                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5928                 if (!LIST_EMPTY(chain)) {
5929                         prev_twait_block = NULL;
5930                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5931                                 if (prev_twait_block) {
5932                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5933                                 }
5934                                 prev_twait_block = twait_block;
5935                         }
5936                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5937                 }
5938         }
5939
5940         /* free the locks and mutexes */
5941 #ifdef SCTP_PACKET_LOGGING
5942         SCTP_IP_PKTLOG_DESTROY();
5943 #endif
5944         SCTP_IPI_ADDR_DESTROY();
5945         SCTP_STATLOG_DESTROY();
5946         SCTP_INP_INFO_LOCK_DESTROY();
5947
5948         SCTP_WQ_ADDR_DESTROY();
5949
5950         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5951         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5952         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5953         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5954         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5955         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5956         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5957         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5958         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5959         /* Get rid of other stuff to */
5960         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5961                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5962         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5963                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5964         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5965                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5966 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5967         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
5968 #endif
5969 }
5970
5971
5972 int
5973 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5974     int offset, int limit,
5975     struct sockaddr *src, struct sockaddr *dst,
5976     struct sockaddr *altsa)
5977 {
5978         /*
5979          * grub through the INIT pulling addresses and loading them to the
5980          * nets structure in the asoc. The from address in the mbuf should
5981          * also be loaded (if it is not already). This routine can be called
5982          * with either INIT or INIT-ACK's as long as the m points to the IP
5983          * packet and the offset points to the beginning of the parameters.
5984          */
5985         struct sctp_inpcb *inp;
5986         struct sctp_nets *net, *nnet, *net_tmp;
5987         struct sctp_paramhdr *phdr, parm_buf;
5988         struct sctp_tcb *stcb_tmp;
5989         uint16_t ptype, plen;
5990         struct sockaddr *sa;
5991         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
5992         struct sctp_auth_random *p_random = NULL;
5993         uint16_t random_len = 0;
5994         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
5995         struct sctp_auth_hmac_algo *hmacs = NULL;
5996         uint16_t hmacs_len = 0;
5997         uint8_t saw_asconf = 0;
5998         uint8_t saw_asconf_ack = 0;
5999         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6000         struct sctp_auth_chunk_list *chunks = NULL;
6001         uint16_t num_chunks = 0;
6002         sctp_key_t *new_key;
6003         uint32_t keylen;
6004         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6005         uint8_t ecn_allowed;
6006
6007 #ifdef INET
6008         struct sockaddr_in sin;
6009
6010 #endif
6011 #ifdef INET6
6012         struct sockaddr_in6 sin6;
6013
6014 #endif
6015
6016         /* First get the destination address setup too. */
6017 #ifdef INET
6018         memset(&sin, 0, sizeof(sin));
6019         sin.sin_family = AF_INET;
6020         sin.sin_len = sizeof(sin);
6021         sin.sin_port = stcb->rport;
6022 #endif
6023 #ifdef INET6
6024         memset(&sin6, 0, sizeof(sin6));
6025         sin6.sin6_family = AF_INET6;
6026         sin6.sin6_len = sizeof(struct sockaddr_in6);
6027         sin6.sin6_port = stcb->rport;
6028 #endif
6029         if (altsa) {
6030                 sa = altsa;
6031         } else {
6032                 sa = src;
6033         }
6034         /* Turn off ECN until we get through all params */
6035         ecn_allowed = 0;
6036         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6037                 /* mark all addresses that we have currently on the list */
6038                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6039         }
6040         /* does the source address already exist? if so skip it */
6041         inp = stcb->sctp_ep;
6042         atomic_add_int(&stcb->asoc.refcnt, 1);
6043         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6044         atomic_add_int(&stcb->asoc.refcnt, -1);
6045
6046         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6047                 /* we must add the source address */
6048                 /* no scope set here since we have a tcb already. */
6049                 switch (sa->sa_family) {
6050 #ifdef INET
6051                 case AF_INET:
6052                         if (stcb->asoc.scope.ipv4_addr_legal) {
6053                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6054                                         return (-1);
6055                                 }
6056                         }
6057                         break;
6058 #endif
6059 #ifdef INET6
6060                 case AF_INET6:
6061                         if (stcb->asoc.scope.ipv6_addr_legal) {
6062                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6063                                         return (-2);
6064                                 }
6065                         }
6066                         break;
6067 #endif
6068                 default:
6069                         break;
6070                 }
6071         } else {
6072                 if (net_tmp != NULL && stcb_tmp == stcb) {
6073                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6074                 } else if (stcb_tmp != stcb) {
6075                         /* It belongs to another association? */
6076                         if (stcb_tmp)
6077                                 SCTP_TCB_UNLOCK(stcb_tmp);
6078                         return (-3);
6079                 }
6080         }
6081         if (stcb->asoc.state == 0) {
6082                 /* the assoc was freed? */
6083                 return (-4);
6084         }
6085         /*
6086          * peer must explicitly turn this on. This may have been initialized
6087          * to be "on" in order to allow local addr changes while INIT's are
6088          * in flight.
6089          */
6090         stcb->asoc.peer_supports_asconf = 0;
6091         /* now we must go through each of the params. */
6092         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6093         while (phdr) {
6094                 ptype = ntohs(phdr->param_type);
6095                 plen = ntohs(phdr->param_length);
6096                 /*
6097                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6098                  * (uint32_t)ptype, (int)plen);
6099                  */
6100                 if (offset + plen > limit) {
6101                         break;
6102                 }
6103                 if (plen == 0) {
6104                         break;
6105                 }
6106 #ifdef INET
6107                 if (ptype == SCTP_IPV4_ADDRESS) {
6108                         if (stcb->asoc.scope.ipv4_addr_legal) {
6109                                 struct sctp_ipv4addr_param *p4, p4_buf;
6110
6111                                 /* ok get the v4 address and check/add */
6112                                 phdr = sctp_get_next_param(m, offset,
6113                                     (struct sctp_paramhdr *)&p4_buf,
6114                                     sizeof(p4_buf));
6115                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6116                                     phdr == NULL) {
6117                                         return (-5);
6118                                 }
6119                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6120                                 sin.sin_addr.s_addr = p4->addr;
6121                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6122                                         /* Skip multi-cast addresses */
6123                                         goto next_param;
6124                                 }
6125                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6126                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6127                                         goto next_param;
6128                                 }
6129                                 sa = (struct sockaddr *)&sin;
6130                                 inp = stcb->sctp_ep;
6131                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6132                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6133                                     dst, stcb);
6134                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6135
6136                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6137                                     inp == NULL) {
6138                                         /* we must add the source address */
6139                                         /*
6140                                          * no scope set since we have a tcb
6141                                          * already
6142                                          */
6143
6144                                         /*
6145                                          * we must validate the state again
6146                                          * here
6147                                          */
6148                         add_it_now:
6149                                         if (stcb->asoc.state == 0) {
6150                                                 /* the assoc was freed? */
6151                                                 return (-7);
6152                                         }
6153                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6154                                                 return (-8);
6155                                         }
6156                                 } else if (stcb_tmp == stcb) {
6157                                         if (stcb->asoc.state == 0) {
6158                                                 /* the assoc was freed? */
6159                                                 return (-10);
6160                                         }
6161                                         if (net != NULL) {
6162                                                 /* clear flag */
6163                                                 net->dest_state &=
6164                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6165                                         }
6166                                 } else {
6167                                         /*
6168                                          * strange, address is in another
6169                                          * assoc? straighten out locks.
6170                                          */
6171                                         if (stcb_tmp) {
6172                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6173                                                         /*
6174                                                          * in setup state we
6175                                                          * abort this guy
6176                                                          */
6177                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6178                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6179                                                         goto add_it_now;
6180                                                 }
6181                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6182                                         }
6183                                         if (stcb->asoc.state == 0) {
6184                                                 /* the assoc was freed? */
6185                                                 return (-12);
6186                                         }
6187                                         return (-13);
6188                                 }
6189                         }
6190                 } else
6191 #endif
6192 #ifdef INET6
6193                 if (ptype == SCTP_IPV6_ADDRESS) {
6194                         if (stcb->asoc.scope.ipv6_addr_legal) {
6195                                 /* ok get the v6 address and check/add */
6196                                 struct sctp_ipv6addr_param *p6, p6_buf;
6197
6198                                 phdr = sctp_get_next_param(m, offset,
6199                                     (struct sctp_paramhdr *)&p6_buf,
6200                                     sizeof(p6_buf));
6201                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6202                                     phdr == NULL) {
6203                                         return (-14);
6204                                 }
6205                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6206                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6207                                     sizeof(p6->addr));
6208                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6209                                         /* Skip multi-cast addresses */
6210                                         goto next_param;
6211                                 }
6212                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6213                                         /*
6214                                          * Link local make no sense without
6215                                          * scope
6216                                          */
6217                                         goto next_param;
6218                                 }
6219                                 sa = (struct sockaddr *)&sin6;
6220                                 inp = stcb->sctp_ep;
6221                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6222                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6223                                     dst, stcb);
6224                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6225                                 if (stcb_tmp == NULL &&
6226                                     (inp == stcb->sctp_ep || inp == NULL)) {
6227                                         /*
6228                                          * we must validate the state again
6229                                          * here
6230                                          */
6231                         add_it_now6:
6232                                         if (stcb->asoc.state == 0) {
6233                                                 /* the assoc was freed? */
6234                                                 return (-16);
6235                                         }
6236                                         /*
6237                                          * we must add the address, no scope
6238                                          * set
6239                                          */
6240                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6241                                                 return (-17);
6242                                         }
6243                                 } else if (stcb_tmp == stcb) {
6244                                         /*
6245                                          * we must validate the state again
6246                                          * here
6247                                          */
6248                                         if (stcb->asoc.state == 0) {
6249                                                 /* the assoc was freed? */
6250                                                 return (-19);
6251                                         }
6252                                         if (net != NULL) {
6253                                                 /* clear flag */
6254                                                 net->dest_state &=
6255                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6256                                         }
6257                                 } else {
6258                                         /*
6259                                          * strange, address is in another
6260                                          * assoc? straighten out locks.
6261                                          */
6262                                         if (stcb_tmp)
6263                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6264                                                         /*
6265                                                          * in setup state we
6266                                                          * abort this guy
6267                                                          */
6268                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6269                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6270                                                         goto add_it_now6;
6271                                                 }
6272                                         SCTP_TCB_UNLOCK(stcb_tmp);
6273
6274                                         if (stcb->asoc.state == 0) {
6275                                                 /* the assoc was freed? */
6276                                                 return (-21);
6277                                         }
6278                                         return (-22);
6279                                 }
6280                         }
6281                 } else
6282 #endif
6283                 if (ptype == SCTP_ECN_CAPABLE) {
6284                         ecn_allowed = 1;
6285                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6286                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6287                                 struct sctp_adaptation_layer_indication ai,
6288                                                                 *aip;
6289
6290                                 phdr = sctp_get_next_param(m, offset,
6291                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6292                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6293                                 if (aip) {
6294                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6295                                         stcb->asoc.adaptation_needed = 1;
6296                                 }
6297                         }
6298                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6299                         struct sctp_asconf_addr_param lstore, *fee;
6300                         int lptype;
6301                         struct sockaddr *lsa = NULL;
6302
6303 #ifdef INET
6304                         struct sctp_asconf_addrv4_param *fii;
6305
6306 #endif
6307
6308                         stcb->asoc.peer_supports_asconf = 1;
6309                         if (plen > sizeof(lstore)) {
6310                                 return (-23);
6311                         }
6312                         phdr = sctp_get_next_param(m, offset,
6313                             (struct sctp_paramhdr *)&lstore,
6314                             min(plen, sizeof(lstore)));
6315                         if (phdr == NULL) {
6316                                 return (-24);
6317                         }
6318                         fee = (struct sctp_asconf_addr_param *)phdr;
6319                         lptype = ntohs(fee->addrp.ph.param_type);
6320                         switch (lptype) {
6321 #ifdef INET
6322                         case SCTP_IPV4_ADDRESS:
6323                                 if (plen !=
6324                                     sizeof(struct sctp_asconf_addrv4_param)) {
6325                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6326                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6327                                             plen);
6328                                 } else {
6329                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6330                                         sin.sin_addr.s_addr = fii->addrp.addr;
6331                                         lsa = (struct sockaddr *)&sin;
6332                                 }
6333                                 break;
6334 #endif
6335 #ifdef INET6
6336                         case SCTP_IPV6_ADDRESS:
6337                                 if (plen !=
6338                                     sizeof(struct sctp_asconf_addr_param)) {
6339                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6340                                             (int)sizeof(struct sctp_asconf_addr_param),
6341                                             plen);
6342                                 } else {
6343                                         memcpy(sin6.sin6_addr.s6_addr,
6344                                             fee->addrp.addr,
6345                                             sizeof(fee->addrp.addr));
6346                                         lsa = (struct sockaddr *)&sin6;
6347                                 }
6348                                 break;
6349 #endif
6350                         default:
6351                                 break;
6352                         }
6353                         if (lsa) {
6354                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6355                         }
6356                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6357                         stcb->asoc.peer_supports_nat = 1;
6358                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6359                         /* Peer supports pr-sctp */
6360                         stcb->asoc.peer_supports_prsctp = 1;
6361                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6362                         /* A supported extension chunk */
6363                         struct sctp_supported_chunk_types_param *pr_supported;
6364                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6365                         int num_ent, i;
6366
6367                         phdr = sctp_get_next_param(m, offset,
6368                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6369                         if (phdr == NULL) {
6370                                 return (-25);
6371                         }
6372                         stcb->asoc.peer_supports_asconf = 0;
6373                         stcb->asoc.peer_supports_prsctp = 0;
6374                         stcb->asoc.peer_supports_pktdrop = 0;
6375                         stcb->asoc.peer_supports_strreset = 0;
6376                         stcb->asoc.peer_supports_nr_sack = 0;
6377                         stcb->asoc.peer_supports_auth = 0;
6378                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6379                         num_ent = plen - sizeof(struct sctp_paramhdr);
6380                         for (i = 0; i < num_ent; i++) {
6381                                 switch (pr_supported->chunk_types[i]) {
6382                                 case SCTP_ASCONF:
6383                                 case SCTP_ASCONF_ACK:
6384                                         stcb->asoc.peer_supports_asconf = 1;
6385                                         break;
6386                                 case SCTP_FORWARD_CUM_TSN:
6387                                         stcb->asoc.peer_supports_prsctp = 1;
6388                                         break;
6389                                 case SCTP_PACKET_DROPPED:
6390                                         stcb->asoc.peer_supports_pktdrop = 1;
6391                                         break;
6392                                 case SCTP_NR_SELECTIVE_ACK:
6393                                         stcb->asoc.peer_supports_nr_sack = 1;
6394                                         break;
6395                                 case SCTP_STREAM_RESET:
6396                                         stcb->asoc.peer_supports_strreset = 1;
6397                                         break;
6398                                 case SCTP_AUTHENTICATION:
6399                                         stcb->asoc.peer_supports_auth = 1;
6400                                         break;
6401                                 default:
6402                                         /* one I have not learned yet */
6403                                         break;
6404
6405                                 }
6406                         }
6407                 } else if (ptype == SCTP_RANDOM) {
6408                         if (plen > sizeof(random_store))
6409                                 break;
6410                         if (got_random) {
6411                                 /* already processed a RANDOM */
6412                                 goto next_param;
6413                         }
6414                         phdr = sctp_get_next_param(m, offset,
6415                             (struct sctp_paramhdr *)random_store,
6416                             min(sizeof(random_store), plen));
6417                         if (phdr == NULL)
6418                                 return (-26);
6419                         p_random = (struct sctp_auth_random *)phdr;
6420                         random_len = plen - sizeof(*p_random);
6421                         /* enforce the random length */
6422                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6423                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6424                                 return (-27);
6425                         }
6426                         got_random = 1;
6427                 } else if (ptype == SCTP_HMAC_LIST) {
6428                         int num_hmacs;
6429                         int i;
6430
6431                         if (plen > sizeof(hmacs_store))
6432                                 break;
6433                         if (got_hmacs) {
6434                                 /* already processed a HMAC list */
6435                                 goto next_param;
6436                         }
6437                         phdr = sctp_get_next_param(m, offset,
6438                             (struct sctp_paramhdr *)hmacs_store,
6439                             min(plen, sizeof(hmacs_store)));
6440                         if (phdr == NULL)
6441                                 return (-28);
6442                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6443                         hmacs_len = plen - sizeof(*hmacs);
6444                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6445                         /* validate the hmac list */
6446                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6447                                 return (-29);
6448                         }
6449                         if (stcb->asoc.peer_hmacs != NULL)
6450                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6451                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6452                         if (stcb->asoc.peer_hmacs != NULL) {
6453                                 for (i = 0; i < num_hmacs; i++) {
6454                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6455                                             ntohs(hmacs->hmac_ids[i]));
6456                                 }
6457                         }
6458                         got_hmacs = 1;
6459                 } else if (ptype == SCTP_CHUNK_LIST) {
6460                         int i;
6461
6462                         if (plen > sizeof(chunks_store))
6463                                 break;
6464                         if (got_chklist) {
6465                                 /* already processed a Chunks list */
6466                                 goto next_param;
6467                         }
6468                         phdr = sctp_get_next_param(m, offset,
6469                             (struct sctp_paramhdr *)chunks_store,
6470                             min(plen, sizeof(chunks_store)));
6471                         if (phdr == NULL)
6472                                 return (-30);
6473                         chunks = (struct sctp_auth_chunk_list *)phdr;
6474                         num_chunks = plen - sizeof(*chunks);
6475                         if (stcb->asoc.peer_auth_chunks != NULL)
6476                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6477                         else
6478                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6479                         for (i = 0; i < num_chunks; i++) {
6480                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6481                                     stcb->asoc.peer_auth_chunks);
6482                                 /* record asconf/asconf-ack if listed */
6483                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6484                                         saw_asconf = 1;
6485                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6486                                         saw_asconf_ack = 1;
6487
6488                         }
6489                         got_chklist = 1;
6490                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6491                             (ptype == SCTP_STATE_COOKIE) ||
6492                             (ptype == SCTP_UNRECOG_PARAM) ||
6493                             (ptype == SCTP_COOKIE_PRESERVE) ||
6494                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6495                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6496                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6497                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6498                     (ptype == SCTP_SUCCESS_REPORT)) {
6499                          /* don't care */ ;
6500                 } else {
6501                         if ((ptype & 0x8000) == 0x0000) {
6502                                 /*
6503                                  * must stop processing the rest of the
6504                                  * param's. Any report bits were handled
6505                                  * with the call to
6506                                  * sctp_arethere_unrecognized_parameters()
6507                                  * when the INIT or INIT-ACK was first seen.
6508                                  */
6509                                 break;
6510                         }
6511                 }
6512
6513 next_param:
6514                 offset += SCTP_SIZE32(plen);
6515                 if (offset >= limit) {
6516                         break;
6517                 }
6518                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6519                     sizeof(parm_buf));
6520         }
6521         /* Now check to see if we need to purge any addresses */
6522         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6523                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6524                     SCTP_ADDR_NOT_IN_ASSOC) {
6525                         /* This address has been removed from the asoc */
6526                         /* remove and free it */
6527                         stcb->asoc.numnets--;
6528                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6529                         sctp_free_remote_addr(net);
6530                         if (net == stcb->asoc.primary_destination) {
6531                                 stcb->asoc.primary_destination = NULL;
6532                                 sctp_select_primary_destination(stcb);
6533                         }
6534                 }
6535         }
6536         if (ecn_allowed == 0) {
6537                 stcb->asoc.ecn_allowed = 0;
6538         }
6539         /* validate authentication required parameters */
6540         if (got_random && got_hmacs) {
6541                 stcb->asoc.peer_supports_auth = 1;
6542         } else {
6543                 stcb->asoc.peer_supports_auth = 0;
6544         }
6545         if (!stcb->asoc.peer_supports_auth && got_chklist) {
6546                 /* peer does not support auth but sent a chunks list? */
6547                 return (-31);
6548         }
6549         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6550             !stcb->asoc.peer_supports_auth) {
6551                 /* peer supports asconf but not auth? */
6552                 return (-32);
6553         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6554             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6555                 return (-33);
6556         }
6557         /* concatenate the full random key */
6558         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6559         if (chunks != NULL) {
6560                 keylen += sizeof(*chunks) + num_chunks;
6561         }
6562         new_key = sctp_alloc_key(keylen);
6563         if (new_key != NULL) {
6564                 /* copy in the RANDOM */
6565                 if (p_random != NULL) {
6566                         keylen = sizeof(*p_random) + random_len;
6567                         bcopy(p_random, new_key->key, keylen);
6568                 }
6569                 /* append in the AUTH chunks */
6570                 if (chunks != NULL) {
6571                         bcopy(chunks, new_key->key + keylen,
6572                             sizeof(*chunks) + num_chunks);
6573                         keylen += sizeof(*chunks) + num_chunks;
6574                 }
6575                 /* append in the HMACs */
6576                 if (hmacs != NULL) {
6577                         bcopy(hmacs, new_key->key + keylen,
6578                             sizeof(*hmacs) + hmacs_len);
6579                 }
6580         } else {
6581                 /* failed to get memory for the key */
6582                 return (-34);
6583         }
6584         if (stcb->asoc.authinfo.peer_random != NULL)
6585                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6586         stcb->asoc.authinfo.peer_random = new_key;
6587         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6588         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6589
6590         return (0);
6591 }
6592
6593 int
6594 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6595     struct sctp_nets *net)
6596 {
6597         /* make sure the requested primary address exists in the assoc */
6598         if (net == NULL && sa)
6599                 net = sctp_findnet(stcb, sa);
6600
6601         if (net == NULL) {
6602                 /* didn't find the requested primary address! */
6603                 return (-1);
6604         } else {
6605                 /* set the primary address */
6606                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6607                         /* Must be confirmed, so queue to set */
6608                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6609                         return (0);
6610                 }
6611                 stcb->asoc.primary_destination = net;
6612                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6613                         sctp_free_remote_addr(stcb->asoc.alternate);
6614                         stcb->asoc.alternate = NULL;
6615                 }
6616                 net = TAILQ_FIRST(&stcb->asoc.nets);
6617                 if (net != stcb->asoc.primary_destination) {
6618                         /*
6619                          * first one on the list is NOT the primary
6620                          * sctp_cmpaddr() is much more efficient if the
6621                          * primary is the first on the list, make it so.
6622                          */
6623                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6624                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6625                 }
6626                 return (0);
6627         }
6628 }
6629
6630 int
6631 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6632 {
6633         /*
6634          * This function serves two purposes. It will see if a TAG can be
6635          * re-used and return 1 for yes it is ok and 0 for don't use that
6636          * tag. A secondary function it will do is purge out old tags that
6637          * can be removed.
6638          */
6639         struct sctpvtaghead *chain;
6640         struct sctp_tagblock *twait_block;
6641         struct sctpasochead *head;
6642         struct sctp_tcb *stcb;
6643         int i;
6644
6645         SCTP_INP_INFO_RLOCK();
6646         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6647             SCTP_BASE_INFO(hashasocmark))];
6648         if (head == NULL) {
6649                 /* invalid vtag */
6650                 goto skip_vtag_check;
6651         }
6652         LIST_FOREACH(stcb, head, sctp_asocs) {
6653                 /*
6654                  * We choose not to lock anything here. TCB's can't be
6655                  * removed since we have the read lock, so they can't be
6656                  * freed on us, same thing for the INP. I may be wrong with
6657                  * this assumption, but we will go with it for now :-)
6658                  */
6659                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6660                         continue;
6661                 }
6662                 if (stcb->asoc.my_vtag == tag) {
6663                         /* candidate */
6664                         if (stcb->rport != rport) {
6665                                 continue;
6666                         }
6667                         if (stcb->sctp_ep->sctp_lport != lport) {
6668                                 continue;
6669                         }
6670                         /* Its a used tag set */
6671                         SCTP_INP_INFO_RUNLOCK();
6672                         return (0);
6673                 }
6674         }
6675 skip_vtag_check:
6676
6677         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6678         /* Now what about timed wait ? */
6679         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6680                 /*
6681                  * Block(s) are present, lets see if we have this tag in the
6682                  * list
6683                  */
6684                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6685                         if (twait_block->vtag_block[i].v_tag == 0) {
6686                                 /* not used */
6687                                 continue;
6688                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6689                             now->tv_sec) {
6690                                 /* Audit expires this guy */
6691                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6692                                 twait_block->vtag_block[i].v_tag = 0;
6693                                 twait_block->vtag_block[i].lport = 0;
6694                                 twait_block->vtag_block[i].rport = 0;
6695                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6696                                     (twait_block->vtag_block[i].lport == lport) &&
6697                             (twait_block->vtag_block[i].rport == rport)) {
6698                                 /* Bad tag, sorry :< */
6699                                 SCTP_INP_INFO_RUNLOCK();
6700                                 return (0);
6701                         }
6702                 }
6703         }
6704         SCTP_INP_INFO_RUNLOCK();
6705         return (1);
6706 }
6707
6708 static void
6709 sctp_drain_mbufs(struct sctp_tcb *stcb)
6710 {
6711         /*
6712          * We must hunt this association for MBUF's past the cumack (i.e.
6713          * out of order data that we can renege on).
6714          */
6715         struct sctp_association *asoc;
6716         struct sctp_tmit_chunk *chk, *nchk;
6717         uint32_t cumulative_tsn_p1;
6718         struct sctp_queued_to_read *ctl, *nctl;
6719         int cnt, strmat;
6720         uint32_t gap, i;
6721         int fnd = 0;
6722
6723         /* We look for anything larger than the cum-ack + 1 */
6724
6725         asoc = &stcb->asoc;
6726         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6727                 /* none we can reneg on. */
6728                 return;
6729         }
6730         SCTP_STAT_INCR(sctps_protocol_drains_done);
6731         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6732         cnt = 0;
6733         /* First look in the re-assembly queue */
6734         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6735                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6736                         /* Yep it is above cum-ack */
6737                         cnt++;
6738                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6739                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6740                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6741                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6742                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6743                         if (chk->data) {
6744                                 sctp_m_freem(chk->data);
6745                                 chk->data = NULL;
6746                         }
6747                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6748                 }
6749         }
6750         /* Ok that was fun, now we will drain all the inbound streams? */
6751         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6752                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6753                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6754                                 /* Yep it is above cum-ack */
6755                                 cnt++;
6756                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6757                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6758                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6759                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6760                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6761                                 if (ctl->data) {
6762                                         sctp_m_freem(ctl->data);
6763                                         ctl->data = NULL;
6764                                 }
6765                                 sctp_free_remote_addr(ctl->whoFrom);
6766                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6767                                 SCTP_DECR_READQ_COUNT();
6768                         }
6769                 }
6770         }
6771         if (cnt) {
6772                 /* We must back down to see what the new highest is */
6773                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6774                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6775                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6776                                 asoc->highest_tsn_inside_map = i;
6777                                 fnd = 1;
6778                                 break;
6779                         }
6780                 }
6781                 if (!fnd) {
6782                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6783                 }
6784                 /*
6785                  * Question, should we go through the delivery queue? The
6786                  * only reason things are on here is the app not reading OR
6787                  * a p-d-api up. An attacker COULD send enough in to
6788                  * initiate the PD-API and then send a bunch of stuff to
6789                  * other streams... these would wind up on the delivery
6790                  * queue.. and then we would not get to them. But in order
6791                  * to do this I then have to back-track and un-deliver
6792                  * sequence numbers in streams.. el-yucko. I think for now
6793                  * we will NOT look at the delivery queue and leave it to be
6794                  * something to consider later. An alternative would be to
6795                  * abort the P-D-API with a notification and then deliver
6796                  * the data.... Or another method might be to keep track of
6797                  * how many times the situation occurs and if we see a
6798                  * possible attack underway just abort the association.
6799                  */
6800 #ifdef SCTP_DEBUG
6801                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6802 #endif
6803                 /*
6804                  * Now do we need to find a new
6805                  * asoc->highest_tsn_inside_map?
6806                  */
6807                 asoc->last_revoke_count = cnt;
6808                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6809                 /* sa_ignore NO_NULL_CHK */
6810                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6811                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6812         }
6813         /*
6814          * Another issue, in un-setting the TSN's in the mapping array we
6815          * DID NOT adjust the highest_tsn marker.  This will cause one of
6816          * two things to occur. It may cause us to do extra work in checking
6817          * for our mapping array movement. More importantly it may cause us
6818          * to SACK every datagram. This may not be a bad thing though since
6819          * we will recover once we get our cum-ack above and all this stuff
6820          * we dumped recovered.
6821          */
6822 }
6823
6824 void
6825 sctp_drain()
6826 {
6827         /*
6828          * We must walk the PCB lists for ALL associations here. The system
6829          * is LOW on MBUF's and needs help. This is where reneging will
6830          * occur. We really hope this does NOT happen!
6831          */
6832         VNET_ITERATOR_DECL(vnet_iter);
6833         VNET_LIST_RLOCK_NOSLEEP();
6834         VNET_FOREACH(vnet_iter) {
6835                 CURVNET_SET(vnet_iter);
6836                 struct sctp_inpcb *inp;
6837                 struct sctp_tcb *stcb;
6838
6839                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6840                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6841 #ifdef VIMAGE
6842                         continue;
6843 #else
6844                         return;
6845 #endif
6846                 }
6847                 SCTP_INP_INFO_RLOCK();
6848                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6849                         /* For each endpoint */
6850                         SCTP_INP_RLOCK(inp);
6851                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6852                                 /* For each association */
6853                                 SCTP_TCB_LOCK(stcb);
6854                                 sctp_drain_mbufs(stcb);
6855                                 SCTP_TCB_UNLOCK(stcb);
6856                         }
6857                         SCTP_INP_RUNLOCK(inp);
6858                 }
6859                 SCTP_INP_INFO_RUNLOCK();
6860                 CURVNET_RESTORE();
6861         }
6862         VNET_LIST_RUNLOCK_NOSLEEP();
6863 }
6864
6865 /*
6866  * start a new iterator
6867  * iterates through all endpoints and associations based on the pcb_state
6868  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6869  * assocs and "ef" (optional) is executed when the iterator completes.
6870  * "inpf" (optional) is executed for each new endpoint as it is being
6871  * iterated through. inpe (optional) is called when the inp completes
6872  * its way through all the stcbs.
6873  */
6874 int
6875 sctp_initiate_iterator(inp_func inpf,
6876     asoc_func af,
6877     inp_func inpe,
6878     uint32_t pcb_state,
6879     uint32_t pcb_features,
6880     uint32_t asoc_state,
6881     void *argp,
6882     uint32_t argi,
6883     end_func ef,
6884     struct sctp_inpcb *s_inp,
6885     uint8_t chunk_output_off)
6886 {
6887         struct sctp_iterator *it = NULL;
6888
6889         if (af == NULL) {
6890                 return (-1);
6891         }
6892         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6893             SCTP_M_ITER);
6894         if (it == NULL) {
6895                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6896                 return (ENOMEM);
6897         }
6898         memset(it, 0, sizeof(*it));
6899         it->function_assoc = af;
6900         it->function_inp = inpf;
6901         if (inpf)
6902                 it->done_current_ep = 0;
6903         else
6904                 it->done_current_ep = 1;
6905         it->function_atend = ef;
6906         it->pointer = argp;
6907         it->val = argi;
6908         it->pcb_flags = pcb_state;
6909         it->pcb_features = pcb_features;
6910         it->asoc_state = asoc_state;
6911         it->function_inp_end = inpe;
6912         it->no_chunk_output = chunk_output_off;
6913         it->vn = curvnet;
6914         if (s_inp) {
6915                 /* Assume lock is held here */
6916                 it->inp = s_inp;
6917                 SCTP_INP_INCR_REF(it->inp);
6918                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
6919         } else {
6920                 SCTP_INP_INFO_RLOCK();
6921                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
6922                 if (it->inp) {
6923                         SCTP_INP_INCR_REF(it->inp);
6924                 }
6925                 SCTP_INP_INFO_RUNLOCK();
6926                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
6927
6928         }
6929         SCTP_IPI_ITERATOR_WQ_LOCK();
6930
6931         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
6932         if (sctp_it_ctl.iterator_running == 0) {
6933                 sctp_wakeup_iterator();
6934         }
6935         SCTP_IPI_ITERATOR_WQ_UNLOCK();
6936         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
6937         return (0);
6938 }