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