sys/netinet/sctp_pcb.c

   1 /*-
   2  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
   3  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
   4  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * a) Redistributions of source code must retain the above copyright notice,
  10  *    this list of conditions and the following disclaimer.
  11  *
  12  * b) Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the distribution.
  15  *
  16  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  30  * THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35
  36 #include <netinet/sctp_os.h>
  37 #include <sys/proc.h>
  38 #include <netinet/sctp_var.h>
  39 #include <netinet/sctp_sysctl.h>
  40 #include <netinet/sctp_pcb.h>
  41 #include <netinet/sctputil.h>
  42 #include <netinet/sctp.h>
  43 #include <netinet/sctp_header.h>
  44 #include <netinet/sctp_asconf.h>
  45 #include <netinet/sctp_output.h>
  46 #include <netinet/sctp_timer.h>
  47 #include <netinet/sctp_bsd_addr.h>
  48 #include <netinet/sctp_dtrace_define.h>
  49 #include <netinet/udp.h>
  50 #ifdef INET6
  51 #include <netinet6/ip6_var.h>
  52 #endif
  53 #include <sys/sched.h>
  54 #include <sys/smp.h>
  55 #include <sys/unistd.h>
  56
  57
  58 VNET_DEFINE(struct sctp_base_info, system_base_info);
  59
  60 /* FIX: we don't handle multiple link local scopes */
  61 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  62 #ifdef INET6
  63 int
  64 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  65 {
  66         struct sockaddr_in6 tmp_a, tmp_b;
  67
  68         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  69         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  70                 return (0);
  71         }
  72         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  73         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  74                 return (0);
  75         }
  76         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  77 }
  78
  79 #endif
  80
  81 void
  82 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  83 {
  84         /*
  85          * We really don't need to lock this, but I will just because it
  86          * does not hurt.
  87          */
  88         SCTP_INP_INFO_RLOCK();
  89         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  90         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  91         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  92         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  93         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  94         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  95         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  96         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
  97         SCTP_INP_INFO_RUNLOCK();
  98 }
  99
 100 /*-
 101  * Addresses are added to VRF's (Virtual Router's). For BSD we
 102  * have only the default VRF 0. We maintain a hash list of
 103  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
 104  * these has a list of addresses. When we add a new address
 105  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 106  * not exist we create it and add it to the list of IFN's
 107  * within the VRF. Once we have the sctp_ifn, we add the
 108  * address to the list. So we look something like:
 109  *
 110  * hash-vrf-table
 111  *   vrf-> ifn-> ifn -> ifn
 112  *   vrf    |
 113  *    ...   +--ifa-> ifa -> ifa
 114  *   vrf
 115  *
 116  * We keep these separate lists since the SCTP subsystem will
 117  * point to these from its source address selection nets structure.
 118  * When an address is deleted it does not happen right away on
 119  * the SCTP side, it gets scheduled. What we do when a
 120  * delete happens is immediately remove the address from
 121  * the master list and decrement the refcount. As our
 122  * addip iterator works through and frees the src address
 123  * selection pointing to the sctp_ifa, eventually the refcount
 124  * will reach 0 and we will delete it. Note that it is assumed
 125  * that any locking on system level ifn/ifa is done at the
 126  * caller of these functions and these routines will only
 127  * lock the SCTP structures as they add or delete things.
 128  *
 129  * Other notes on VRF concepts.
 130  *  - An endpoint can be in multiple VRF's
 131  *  - An association lives within a VRF and only one VRF.
 132  *  - Any incoming packet we can deduce the VRF for by
 133  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 134  *  - Any downward send call or connect call must supply the
 135  *    VRF via ancillary data or via some sort of set default
 136  *    VRF socket option call (again for BSD no brainer since
 137  *    the VRF is always 0).
 138  *  - An endpoint may add multiple VRF's to it.
 139  *  - Listening sockets can accept associations in any
 140  *    of the VRF's they are in but the assoc will end up
 141  *    in only one VRF (gotten from the packet or connect/send).
 142  *
 143  */
 144
 145 struct sctp_vrf *
 146 sctp_allocate_vrf(int vrf_id)
 147 {
 148         struct sctp_vrf *vrf = NULL;
 149         struct sctp_vrflist *bucket;
 150
 151         /* First allocate the VRF structure */
 152         vrf = sctp_find_vrf(vrf_id);
 153         if (vrf) {
 154                 /* Already allocated */
 155                 return (vrf);
 156         }
 157         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 158             SCTP_M_VRF);
 159         if (vrf == NULL) {
 160                 /* No memory */
 161 #ifdef INVARIANTS
 162                 panic("No memory for VRF:%d", vrf_id);
 163 #endif
 164                 return (NULL);
 165         }
 166         /* setup the VRF */
 167         memset(vrf, 0, sizeof(struct sctp_vrf));
 168         vrf->vrf_id = vrf_id;
 169         LIST_INIT(&vrf->ifnlist);
 170         vrf->total_ifa_count = 0;
 171         vrf->refcount = 0;
 172         /* now also setup table ids */
 173         SCTP_INIT_VRF_TABLEID(vrf);
 174         /* Init the HASH of addresses */
 175         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 176             &vrf->vrf_addr_hashmark);
 177         if (vrf->vrf_addr_hash == NULL) {
 178                 /* No memory */
 179 #ifdef INVARIANTS
 180                 panic("No memory for VRF:%d", vrf_id);
 181 #endif
 182                 SCTP_FREE(vrf, SCTP_M_VRF);
 183                 return (NULL);
 184         }
 185         /* Add it to the hash table */
 186         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 187         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 188         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 189         return (vrf);
 190 }
 191
 192
 193 struct sctp_ifn *
 194 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 195 {
 196         struct sctp_ifn *sctp_ifnp;
 197         struct sctp_ifnlist *hash_ifn_head;
 198
 199         /*
 200          * We assume the lock is held for the addresses if that's wrong
 201          * problems could occur :-)
 202          */
 203         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 204         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 205                 if (sctp_ifnp->ifn_index == ifn_index) {
 206                         return (sctp_ifnp);
 207                 }
 208                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 209                         return (sctp_ifnp);
 210                 }
 211         }
 212         return (NULL);
 213 }
 214
 215
 216 struct sctp_vrf *
 217 sctp_find_vrf(uint32_t vrf_id)
 218 {
 219         struct sctp_vrflist *bucket;
 220         struct sctp_vrf *liste;
 221
 222         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 223         LIST_FOREACH(liste, bucket, next_vrf) {
 224                 if (vrf_id == liste->vrf_id) {
 225                         return (liste);
 226                 }
 227         }
 228         return (NULL);
 229 }
 230
 231
 232 void
 233 sctp_free_vrf(struct sctp_vrf *vrf)
 234 {
 235         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 236                 if (vrf->vrf_addr_hash) {
 237                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 238                         vrf->vrf_addr_hash = NULL;
 239                 }
 240                 /* We zero'd the count */
 241                 LIST_REMOVE(vrf, next_vrf);
 242                 SCTP_FREE(vrf, SCTP_M_VRF);
 243                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 244         }
 245 }
 246
 247
 248 void
 249 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 250 {
 251         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 252                 /* We zero'd the count */
 253                 if (sctp_ifnp->vrf) {
 254                         sctp_free_vrf(sctp_ifnp->vrf);
 255                 }
 256                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 257                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 258         }
 259 }
 260
 261
 262 void
 263 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 264 {
 265         struct sctp_ifn *sctp_ifnp;
 266
 267         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 268         if (sctp_ifnp != NULL) {
 269                 sctp_ifnp->ifn_mtu = mtu;
 270         }
 271 }
 272
 273
 274 void
 275 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 276 {
 277         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 278                 /* We zero'd the count */
 279                 if (sctp_ifap->ifn_p) {
 280                         sctp_free_ifn(sctp_ifap->ifn_p);
 281                 }
 282                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 283                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 284         }
 285 }
 286
 287
 288 static void
 289 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 290 {
 291         struct sctp_ifn *found;
 292
 293         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 294         if (found == NULL) {
 295                 /* Not in the list.. sorry */
 296                 return;
 297         }
 298         if (hold_addr_lock == 0)
 299                 SCTP_IPI_ADDR_WLOCK();
 300         LIST_REMOVE(sctp_ifnp, next_bucket);
 301         LIST_REMOVE(sctp_ifnp, next_ifn);
 302         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 303             sctp_ifnp->registered_af);
 304         if (hold_addr_lock == 0)
 305                 SCTP_IPI_ADDR_WUNLOCK();
 306         /* Take away the reference, and possibly free it */
 307         sctp_free_ifn(sctp_ifnp);
 308 }
 309
 310
 311 void
 312 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 313     const char *if_name, uint32_t ifn_index)
 314 {
 315         struct sctp_vrf *vrf;
 316         struct sctp_ifa *sctp_ifap;
 317
 318         SCTP_IPI_ADDR_RLOCK();
 319         vrf = sctp_find_vrf(vrf_id);
 320         if (vrf == NULL) {
 321                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 322                 goto out;
 323
 324         }
 325         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 326         if (sctp_ifap == NULL) {
 327                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 328                 goto out;
 329         }
 330         if (sctp_ifap->ifn_p == NULL) {
 331                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 332                 goto out;
 333         }
 334         if (if_name) {
 335                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 336                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 337                             sctp_ifap->ifn_p->ifn_name, if_name);
 338                         goto out;
 339                 }
 340         } else {
 341                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 342                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 343                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 344                         goto out;
 345                 }
 346         }
 347
 348         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 349         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 350 out:
 351         SCTP_IPI_ADDR_RUNLOCK();
 352 }
 353
 354
 355 void
 356 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 357     const char *if_name, uint32_t ifn_index)
 358 {
 359         struct sctp_vrf *vrf;
 360         struct sctp_ifa *sctp_ifap;
 361
 362         SCTP_IPI_ADDR_RLOCK();
 363         vrf = sctp_find_vrf(vrf_id);
 364         if (vrf == NULL) {
 365                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 366                 goto out;
 367
 368         }
 369         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 370         if (sctp_ifap == NULL) {
 371                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 372                 goto out;
 373         }
 374         if (sctp_ifap->ifn_p == NULL) {
 375                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 376                 goto out;
 377         }
 378         if (if_name) {
 379                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 380                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 381                             sctp_ifap->ifn_p->ifn_name, if_name);
 382                         goto out;
 383                 }
 384         } else {
 385                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 386                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 387                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 388                         goto out;
 389                 }
 390         }
 391
 392         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 393         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 394 out:
 395         SCTP_IPI_ADDR_RUNLOCK();
 396 }
 397
 398
 399 /*-
 400  * Add an ifa to an ifn.
 401  * Register the interface as necessary.
 402  * NOTE: ADDR write lock MUST be held.
 403  */
 404 static void
 405 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 406 {
 407         int ifa_af;
 408
 409         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 410         sctp_ifap->ifn_p = sctp_ifnp;
 411         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 412         /* update address counts */
 413         sctp_ifnp->ifa_count++;
 414         ifa_af = sctp_ifap->address.sa.sa_family;
 415         switch (ifa_af) {
 416 #ifdef INET
 417         case AF_INET:
 418                 sctp_ifnp->num_v4++;
 419                 break;
 420 #endif
 421 #ifdef INET6
 422         case AF_INET6:
 423                 sctp_ifnp->num_v6++;
 424                 break;
 425 #endif
 426         default:
 427                 break;
 428         }
 429         if (sctp_ifnp->ifa_count == 1) {
 430                 /* register the new interface */
 431                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 432                 sctp_ifnp->registered_af = ifa_af;
 433         }
 434 }
 435
 436
 437 /*-
 438  * Remove an ifa from its ifn.
 439  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 440  * the interface based on the remaining address families left.
 441  * NOTE: ADDR write lock MUST be held.
 442  */
 443 static void
 444 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 445 {
 446         LIST_REMOVE(sctp_ifap, next_ifa);
 447         if (sctp_ifap->ifn_p) {
 448                 /* update address counts */
 449                 sctp_ifap->ifn_p->ifa_count--;
 450                 switch (sctp_ifap->address.sa.sa_family) {
 451 #ifdef INET
 452                 case AF_INET:
 453                         sctp_ifap->ifn_p->num_v4--;
 454                         break;
 455 #endif
 456 #ifdef INET6
 457                 case AF_INET6:
 458                         sctp_ifap->ifn_p->num_v6--;
 459                         break;
 460 #endif
 461                 default:
 462                         break;
 463                 }
 464
 465                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 466                         /* remove the ifn, possibly freeing it */
 467                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 468                 } else {
 469                         /* re-register address family type, if needed */
 470                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 471                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 472                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 473                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 474                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 475                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 476                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 477                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 478                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 479                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 480                         }
 481                         /* free the ifn refcount */
 482                         sctp_free_ifn(sctp_ifap->ifn_p);
 483                 }
 484                 sctp_ifap->ifn_p = NULL;
 485         }
 486 }
 487
 488
 489 struct sctp_ifa *
 490 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 491     uint32_t ifn_type, const char *if_name, void *ifa,
 492     struct sockaddr *addr, uint32_t ifa_flags,
 493     int dynamic_add)
 494 {
 495         struct sctp_vrf *vrf;
 496         struct sctp_ifn *sctp_ifnp = NULL;
 497         struct sctp_ifa *sctp_ifap = NULL;
 498         struct sctp_ifalist *hash_addr_head;
 499         struct sctp_ifnlist *hash_ifn_head;
 500         uint32_t hash_of_addr;
 501         int new_ifn_af = 0;
 502
 503 #ifdef SCTP_DEBUG
 504         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 505         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 506 #endif
 507         SCTP_IPI_ADDR_WLOCK();
 508         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 509         if (sctp_ifnp) {
 510                 vrf = sctp_ifnp->vrf;
 511         } else {
 512                 vrf = sctp_find_vrf(vrf_id);
 513                 if (vrf == NULL) {
 514                         vrf = sctp_allocate_vrf(vrf_id);
 515                         if (vrf == NULL) {
 516                                 SCTP_IPI_ADDR_WUNLOCK();
 517                                 return (NULL);
 518                         }
 519                 }
 520         }
 521         if (sctp_ifnp == NULL) {
 522                 /*
 523                  * build one and add it, can't hold lock until after malloc
 524                  * done though.
 525                  */
 526                 SCTP_IPI_ADDR_WUNLOCK();
 527                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 528                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 529                 if (sctp_ifnp == NULL) {
 530 #ifdef INVARIANTS
 531                         panic("No memory for IFN");
 532 #endif
 533                         return (NULL);
 534                 }
 535                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 536                 sctp_ifnp->ifn_index = ifn_index;
 537                 sctp_ifnp->ifn_p = ifn;
 538                 sctp_ifnp->ifn_type = ifn_type;
 539                 sctp_ifnp->refcount = 0;
 540                 sctp_ifnp->vrf = vrf;
 541                 atomic_add_int(&vrf->refcount, 1);
 542                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 543                 if (if_name != NULL) {
 544                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
 545                 } else {
 546                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
 547                 }
 548                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 549                 LIST_INIT(&sctp_ifnp->ifalist);
 550                 SCTP_IPI_ADDR_WLOCK();
 551                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 552                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 553                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 554                 new_ifn_af = 1;
 555         }
 556         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 557         if (sctp_ifap) {
 558                 /* Hmm, it already exists? */
 559                 if ((sctp_ifap->ifn_p) &&
 560                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 561                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 562                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 563                             (void *)sctp_ifap);
 564                         if (new_ifn_af) {
 565                                 /* Remove the created one that we don't want */
 566                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 567                         }
 568                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 569                                 /* easy to solve, just switch back to active */
 570                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 571                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 572                                 sctp_ifap->ifn_p = sctp_ifnp;
 573                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 574                         }
 575         exit_stage_left:
 576                         SCTP_IPI_ADDR_WUNLOCK();
 577                         return (sctp_ifap);
 578                 } else {
 579                         if (sctp_ifap->ifn_p) {
 580                                 /*
 581                                  * The last IFN gets the address, remove the
 582                                  * old one
 583                                  */
 584                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 585                                     (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 586                                     sctp_ifap->ifn_p->ifn_index, if_name,
 587                                     ifn_index);
 588                                 /* remove the address from the old ifn */
 589                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 590                                 /* move the address over to the new ifn */
 591                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 592                                 goto exit_stage_left;
 593                         } else {
 594                                 /* repair ifnp which was NULL ? */
 595                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 596                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 597                                     (void *)sctp_ifnp, (void *)sctp_ifap);
 598                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 599                         }
 600                         goto exit_stage_left;
 601                 }
 602         }
 603         SCTP_IPI_ADDR_WUNLOCK();
 604         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 605         if (sctp_ifap == NULL) {
 606 #ifdef INVARIANTS
 607                 panic("No memory for IFA");
 608 #endif
 609                 return (NULL);
 610         }
 611         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 612         sctp_ifap->ifn_p = sctp_ifnp;
 613         atomic_add_int(&sctp_ifnp->refcount, 1);
 614         sctp_ifap->vrf_id = vrf_id;
 615         sctp_ifap->ifa = ifa;
 616         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 617         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 618         sctp_ifap->flags = ifa_flags;
 619         /* Set scope */
 620         switch (sctp_ifap->address.sa.sa_family) {
 621 #ifdef INET
 622         case AF_INET:
 623                 {
 624                         struct sockaddr_in *sin;
 625
 626                         sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
 627                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 628                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 629                                 sctp_ifap->src_is_loop = 1;
 630                         }
 631                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 632                                 sctp_ifap->src_is_priv = 1;
 633                         }
 634                         sctp_ifnp->num_v4++;
 635                         if (new_ifn_af)
 636                                 new_ifn_af = AF_INET;
 637                         break;
 638                 }
 639 #endif
 640 #ifdef INET6
 641         case AF_INET6:
 642                 {
 643                         /* ok to use deprecated addresses? */
 644                         struct sockaddr_in6 *sin6;
 645
 646                         sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
 647                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 648                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 649                                 sctp_ifap->src_is_loop = 1;
 650                         }
 651                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 652                                 sctp_ifap->src_is_priv = 1;
 653                         }
 654                         sctp_ifnp->num_v6++;
 655                         if (new_ifn_af)
 656                                 new_ifn_af = AF_INET6;
 657                         break;
 658                 }
 659 #endif
 660         default:
 661                 new_ifn_af = 0;
 662                 break;
 663         }
 664         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 665
 666         if ((sctp_ifap->src_is_priv == 0) &&
 667             (sctp_ifap->src_is_loop == 0)) {
 668                 sctp_ifap->src_is_glob = 1;
 669         }
 670         SCTP_IPI_ADDR_WLOCK();
 671         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 672         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 673         sctp_ifap->refcount = 1;
 674         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 675         sctp_ifnp->ifa_count++;
 676         vrf->total_ifa_count++;
 677         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 678         if (new_ifn_af) {
 679                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 680                 sctp_ifnp->registered_af = new_ifn_af;
 681         }
 682         SCTP_IPI_ADDR_WUNLOCK();
 683         if (dynamic_add) {
 684                 /*
 685                  * Bump up the refcount so that when the timer completes it
 686                  * will drop back down.
 687                  */
 688                 struct sctp_laddr *wi;
 689
 690                 atomic_add_int(&sctp_ifap->refcount, 1);
 691                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 692                 if (wi == NULL) {
 693                         /*
 694                          * Gak, what can we do? We have lost an address
 695                          * change can you say HOSED?
 696                          */
 697                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 698                         /* Opps, must decrement the count */
 699                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 700                             if_name);
 701                         return (NULL);
 702                 }
 703                 SCTP_INCR_LADDR_COUNT();
 704                 bzero(wi, sizeof(*wi));
 705                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 706                 wi->ifa = sctp_ifap;
 707                 wi->action = SCTP_ADD_IP_ADDRESS;
 708
 709                 SCTP_WQ_ADDR_LOCK();
 710                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 711                 SCTP_WQ_ADDR_UNLOCK();
 712
 713                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 714                     (struct sctp_inpcb *)NULL,
 715                     (struct sctp_tcb *)NULL,
 716                     (struct sctp_nets *)NULL);
 717         } else {
 718                 /* it's ready for use */
 719                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 720         }
 721         return (sctp_ifap);
 722 }
 723
 724 void
 725 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 726     uint32_t ifn_index, const char *if_name)
 727 {
 728         struct sctp_vrf *vrf;
 729         struct sctp_ifa *sctp_ifap = NULL;
 730
 731         SCTP_IPI_ADDR_WLOCK();
 732         vrf = sctp_find_vrf(vrf_id);
 733         if (vrf == NULL) {
 734                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 735                 goto out_now;
 736         }
 737 #ifdef SCTP_DEBUG
 738         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 739         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 740 #endif
 741         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 742         if (sctp_ifap) {
 743                 /* Validate the delete */
 744                 if (sctp_ifap->ifn_p) {
 745                         int valid = 0;
 746
 747                         /*-
 748                          * The name has priority over the ifn_index
 749                          * if its given. We do this especially for
 750                          * panda who might recycle indexes fast.
 751                          */
 752                         if (if_name) {
 753                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 754                                         /* They match its a correct delete */
 755                                         valid = 1;
 756                                 }
 757                         }
 758                         if (!valid) {
 759                                 /* last ditch check ifn_index */
 760                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 761                                         valid = 1;
 762                                 }
 763                         }
 764                         if (!valid) {
 765                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 766                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 767                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 768                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 769                                 SCTP_IPI_ADDR_WUNLOCK();
 770                                 return;
 771                         }
 772                 }
 773                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
 774                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 775                 /*
 776                  * We don't set the flag. This means that the structure will
 777                  * hang around in EP's that have bound specific to it until
 778                  * they close. This gives us TCP like behavior if someone
 779                  * removes an address (or for that matter adds it right
 780                  * back).
 781                  */
 782                 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
 783                 vrf->total_ifa_count--;
 784                 LIST_REMOVE(sctp_ifap, next_bucket);
 785                 sctp_remove_ifa_from_ifn(sctp_ifap);
 786         }
 787 #ifdef SCTP_DEBUG
 788         else {
 789                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 790                     ifn_index);
 791                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 792         }
 793 #endif
 794
 795 out_now:
 796         SCTP_IPI_ADDR_WUNLOCK();
 797         if (sctp_ifap) {
 798                 struct sctp_laddr *wi;
 799
 800                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 801                 if (wi == NULL) {
 802                         /*
 803                          * Gak, what can we do? We have lost an address
 804                          * change can you say HOSED?
 805                          */
 806                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 807
 808                         /* Oops, must decrement the count */
 809                         sctp_free_ifa(sctp_ifap);
 810                         return;
 811                 }
 812                 SCTP_INCR_LADDR_COUNT();
 813                 bzero(wi, sizeof(*wi));
 814                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 815                 wi->ifa = sctp_ifap;
 816                 wi->action = SCTP_DEL_IP_ADDRESS;
 817                 SCTP_WQ_ADDR_LOCK();
 818                 /*
 819                  * Should this really be a tailq? As it is we will process
 820                  * the newest first :-0
 821                  */
 822                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 823                 SCTP_WQ_ADDR_UNLOCK();
 824
 825                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 826                     (struct sctp_inpcb *)NULL,
 827                     (struct sctp_tcb *)NULL,
 828                     (struct sctp_nets *)NULL);
 829         }
 830         return;
 831 }
 832
 833
 834 static int
 835 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
 836 {
 837         int loopback_scope;
 838
 839 #if defined(INET)
 840         int ipv4_local_scope, ipv4_addr_legal;
 841
 842 #endif
 843 #if defined(INET6)
 844         int local_scope, site_scope, ipv6_addr_legal;
 845
 846 #endif
 847         struct sctp_vrf *vrf;
 848         struct sctp_ifn *sctp_ifn;
 849         struct sctp_ifa *sctp_ifa;
 850
 851         loopback_scope = stcb->asoc.scope.loopback_scope;
 852 #if defined(INET)
 853         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
 854         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
 855 #endif
 856 #if defined(INET6)
 857         local_scope = stcb->asoc.scope.local_scope;
 858         site_scope = stcb->asoc.scope.site_scope;
 859         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
 860 #endif
 861
 862         SCTP_IPI_ADDR_RLOCK();
 863         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
 864         if (vrf == NULL) {
 865                 /* no vrf, no addresses */
 866                 SCTP_IPI_ADDR_RUNLOCK();
 867                 return (0);
 868         }
 869         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 870                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 871                         if ((loopback_scope == 0) &&
 872                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 873                                 continue;
 874                         }
 875                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 876                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
 877                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
 878                                         /*
 879                                          * We allow pending addresses, where
 880                                          * we have sent an asconf-add to be
 881                                          * considered valid.
 882                                          */
 883                                         continue;
 884                                 }
 885                                 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
 886                                         continue;
 887                                 }
 888                                 switch (sctp_ifa->address.sa.sa_family) {
 889 #ifdef INET
 890                                 case AF_INET:
 891                                         if (ipv4_addr_legal) {
 892                                                 struct sockaddr_in *sin,
 893                                                            *rsin;
 894
 895                                                 sin = &sctp_ifa->address.sin;
 896                                                 rsin = (struct sockaddr_in *)to;
 897                                                 if ((ipv4_local_scope == 0) &&
 898                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 899                                                         continue;
 900                                                 }
 901                                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
 902                                                     &sin->sin_addr) != 0) {
 903                                                         continue;
 904                                                 }
 905                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 906                                                         SCTP_IPI_ADDR_RUNLOCK();
 907                                                         return (1);
 908                                                 }
 909                                         }
 910                                         break;
 911 #endif
 912 #ifdef INET6
 913                                 case AF_INET6:
 914                                         if (ipv6_addr_legal) {
 915                                                 struct sockaddr_in6 *sin6,
 916                                                             *rsin6;
 917
 918                                                 sin6 = &sctp_ifa->address.sin6;
 919                                                 rsin6 = (struct sockaddr_in6 *)to;
 920                                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
 921                                                     &sin6->sin6_addr) != 0) {
 922                                                         continue;
 923                                                 }
 924                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 925                                                         if (local_scope == 0)
 926                                                                 continue;
 927                                                         if (sin6->sin6_scope_id == 0) {
 928                                                                 if (sa6_recoverscope(sin6) != 0)
 929                                                                         continue;
 930                                                         }
 931                                                 }
 932                                                 if ((site_scope == 0) &&
 933                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
 934                                                         continue;
 935                                                 }
 936                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 937                                                         SCTP_IPI_ADDR_RUNLOCK();
 938                                                         return (1);
 939                                                 }
 940                                         }
 941                                         break;
 942 #endif
 943                                 default:
 944                                         /* TSNH */
 945                                         break;
 946                                 }
 947                         }
 948                 }
 949         } else {
 950                 struct sctp_laddr *laddr;
 951
 952                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
 953                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 954                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 955                                 continue;
 956                         }
 957                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
 958                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
 959                                 /*
 960                                  * We allow pending addresses, where we have
 961                                  * sent an asconf-add to be considered
 962                                  * valid.
 963                                  */
 964                                 continue;
 965                         }
 966                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
 967                                 continue;
 968                         }
 969                         switch (to->sa_family) {
 970 #ifdef INET
 971                         case AF_INET:
 972                                 {
 973                                         struct sockaddr_in *sin, *rsin;
 974
 975                                         sin = (struct sockaddr_in *)&laddr->ifa->address.sin;
 976                                         rsin = (struct sockaddr_in *)to;
 977                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 978                                                 SCTP_IPI_ADDR_RUNLOCK();
 979                                                 return (1);
 980                                         }
 981                                         break;
 982                                 }
 983 #endif
 984 #ifdef INET6
 985                         case AF_INET6:
 986                                 {
 987                                         struct sockaddr_in6 *sin6, *rsin6;
 988
 989                                         sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6;
 990                                         rsin6 = (struct sockaddr_in6 *)to;
 991                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 992                                                 SCTP_IPI_ADDR_RUNLOCK();
 993                                                 return (1);
 994                                         }
 995                                         break;
 996                                 }
 997
 998 #endif
 999                         default:
1000                                 /* TSNH */
1001                                 break;
1002                         }
1003
1004                 }
1005         }
1006         SCTP_IPI_ADDR_RUNLOCK();
1007         return (0);
1008 }
1009
1010
1011 static struct sctp_tcb *
1012 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1013     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1014 {
1015         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1016         /*
1017          * If we support the TCP model, then we must now dig through to see
1018          * if we can find our endpoint in the list of tcp ep's.
1019          */
1020         uint16_t lport, rport;
1021         struct sctppcbhead *ephead;
1022         struct sctp_inpcb *inp;
1023         struct sctp_laddr *laddr;
1024         struct sctp_tcb *stcb;
1025         struct sctp_nets *net;
1026
1027         if ((to == NULL) || (from == NULL)) {
1028                 return (NULL);
1029         }
1030         switch (to->sa_family) {
1031 #ifdef INET
1032         case AF_INET:
1033                 if (from->sa_family == AF_INET) {
1034                         lport = ((struct sockaddr_in *)to)->sin_port;
1035                         rport = ((struct sockaddr_in *)from)->sin_port;
1036                 } else {
1037                         return (NULL);
1038                 }
1039                 break;
1040 #endif
1041 #ifdef INET6
1042         case AF_INET6:
1043                 if (from->sa_family == AF_INET6) {
1044                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
1045                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
1046                 } else {
1047                         return (NULL);
1048                 }
1049                 break;
1050 #endif
1051         default:
1052                 return (NULL);
1053         }
1054         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1055         /*
1056          * Ok now for each of the guys in this bucket we must look and see:
1057          * - Does the remote port match. - Does there single association's
1058          * addresses match this address (to). If so we update p_ep to point
1059          * to this ep and return the tcb from it.
1060          */
1061         LIST_FOREACH(inp, ephead, sctp_hash) {
1062                 SCTP_INP_RLOCK(inp);
1063                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1064                         SCTP_INP_RUNLOCK(inp);
1065                         continue;
1066                 }
1067                 if (lport != inp->sctp_lport) {
1068                         SCTP_INP_RUNLOCK(inp);
1069                         continue;
1070                 }
1071                 switch (to->sa_family) {
1072 #ifdef INET
1073                 case AF_INET:
1074                         {
1075                                 struct sockaddr_in *sin;
1076
1077                                 sin = (struct sockaddr_in *)to;
1078                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1079                                     &sin->sin_addr) != 0) {
1080                                         SCTP_INP_RUNLOCK(inp);
1081                                         continue;
1082                                 }
1083                                 break;
1084                         }
1085 #endif
1086 #ifdef INET6
1087                 case AF_INET6:
1088                         {
1089                                 struct sockaddr_in6 *sin6;
1090
1091                                 sin6 = (struct sockaddr_in6 *)to;
1092                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1093                                     &sin6->sin6_addr) != 0) {
1094                                         SCTP_INP_RUNLOCK(inp);
1095                                         continue;
1096                                 }
1097                                 break;
1098                         }
1099 #endif
1100                 default:
1101                         SCTP_INP_RUNLOCK(inp);
1102                         continue;
1103                 }
1104                 if (inp->def_vrf_id != vrf_id) {
1105                         SCTP_INP_RUNLOCK(inp);
1106                         continue;
1107                 }
1108                 /* check to see if the ep has one of the addresses */
1109                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1110                         /* We are NOT bound all, so look further */
1111                         int match = 0;
1112
1113                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1114
1115                                 if (laddr->ifa == NULL) {
1116                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
1117                                         continue;
1118                                 }
1119                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1120                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1121                                         continue;
1122                                 }
1123                                 if (laddr->ifa->address.sa.sa_family ==
1124                                     to->sa_family) {
1125                                         /* see if it matches */
1126 #ifdef INET
1127                                         if (from->sa_family == AF_INET) {
1128                                                 struct sockaddr_in *intf_addr,
1129                                                            *sin;
1130
1131                                                 intf_addr = &laddr->ifa->address.sin;
1132                                                 sin = (struct sockaddr_in *)to;
1133                                                 if (sin->sin_addr.s_addr ==
1134                                                     intf_addr->sin_addr.s_addr) {
1135                                                         match = 1;
1136                                                         break;
1137                                                 }
1138                                         }
1139 #endif
1140 #ifdef INET6
1141                                         if (from->sa_family == AF_INET6) {
1142                                                 struct sockaddr_in6 *intf_addr6;
1143                                                 struct sockaddr_in6 *sin6;
1144
1145                                                 sin6 = (struct sockaddr_in6 *)
1146                                                     to;
1147                                                 intf_addr6 = &laddr->ifa->address.sin6;
1148
1149                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1150                                                     intf_addr6)) {
1151                                                         match = 1;
1152                                                         break;
1153                                                 }
1154                                         }
1155 #endif
1156                                 }
1157                         }
1158                         if (match == 0) {
1159                                 /* This endpoint does not have this address */
1160                                 SCTP_INP_RUNLOCK(inp);
1161                                 continue;
1162                         }
1163                 }
1164                 /*
1165                  * Ok if we hit here the ep has the address, does it hold
1166                  * the tcb?
1167                  */
1168                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1169                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1170                 if (stcb == NULL) {
1171                         SCTP_INP_RUNLOCK(inp);
1172                         continue;
1173                 }
1174                 SCTP_TCB_LOCK(stcb);
1175                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1176                         SCTP_TCB_UNLOCK(stcb);
1177                         SCTP_INP_RUNLOCK(inp);
1178                         continue;
1179                 }
1180                 if (stcb->rport != rport) {
1181                         /* remote port does not match. */
1182                         SCTP_TCB_UNLOCK(stcb);
1183                         SCTP_INP_RUNLOCK(inp);
1184                         continue;
1185                 }
1186                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1187                         SCTP_TCB_UNLOCK(stcb);
1188                         SCTP_INP_RUNLOCK(inp);
1189                         continue;
1190                 }
1191                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1192                         SCTP_TCB_UNLOCK(stcb);
1193                         SCTP_INP_RUNLOCK(inp);
1194                         continue;
1195                 }
1196                 /* Does this TCB have a matching address? */
1197                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1198
1199                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1200                                 /* not the same family, can't be a match */
1201                                 continue;
1202                         }
1203                         switch (from->sa_family) {
1204 #ifdef INET
1205                         case AF_INET:
1206                                 {
1207                                         struct sockaddr_in *sin, *rsin;
1208
1209                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
1210                                         rsin = (struct sockaddr_in *)from;
1211                                         if (sin->sin_addr.s_addr ==
1212                                             rsin->sin_addr.s_addr) {
1213                                                 /* found it */
1214                                                 if (netp != NULL) {
1215                                                         *netp = net;
1216                                                 }
1217                                                 /*
1218                                                  * Update the endpoint
1219                                                  * pointer
1220                                                  */
1221                                                 *inp_p = inp;
1222                                                 SCTP_INP_RUNLOCK(inp);
1223                                                 return (stcb);
1224                                         }
1225                                         break;
1226                                 }
1227 #endif
1228 #ifdef INET6
1229                         case AF_INET6:
1230                                 {
1231                                         struct sockaddr_in6 *sin6, *rsin6;
1232
1233                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1234                                         rsin6 = (struct sockaddr_in6 *)from;
1235                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1236                                             rsin6)) {
1237                                                 /* found it */
1238                                                 if (netp != NULL) {
1239                                                         *netp = net;
1240                                                 }
1241                                                 /*
1242                                                  * Update the endpoint
1243                                                  * pointer
1244                                                  */
1245                                                 *inp_p = inp;
1246                                                 SCTP_INP_RUNLOCK(inp);
1247                                                 return (stcb);
1248                                         }
1249                                         break;
1250                                 }
1251 #endif
1252                         default:
1253                                 /* TSNH */
1254                                 break;
1255                         }
1256                 }
1257                 SCTP_TCB_UNLOCK(stcb);
1258                 SCTP_INP_RUNLOCK(inp);
1259         }
1260         return (NULL);
1261 }
1262
1263
1264 /*
1265  * rules for use
1266  *
1267  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1268  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1269  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1270  * NULL.
1271  */
1272
1273 struct sctp_tcb *
1274 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1275     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1276 {
1277         struct sctpasochead *head;
1278         struct sctp_inpcb *inp;
1279         struct sctp_tcb *stcb = NULL;
1280         struct sctp_nets *net;
1281         uint16_t rport;
1282
1283         inp = *inp_p;
1284         switch (remote->sa_family) {
1285 #ifdef INET
1286         case AF_INET:
1287                 rport = (((struct sockaddr_in *)remote)->sin_port);
1288                 break;
1289 #endif
1290 #ifdef INET6
1291         case AF_INET6:
1292                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1293                 break;
1294 #endif
1295         default:
1296                 return (NULL);
1297         }
1298         if (locked_tcb) {
1299                 /*
1300                  * UN-lock so we can do proper locking here this occurs when
1301                  * called from load_addresses_from_init.
1302                  */
1303                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1304                 SCTP_TCB_UNLOCK(locked_tcb);
1305         }
1306         SCTP_INP_INFO_RLOCK();
1307         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1308             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1309                 /*-
1310                  * Now either this guy is our listener or it's the
1311                  * connector. If it is the one that issued the connect, then
1312                  * it's only chance is to be the first TCB in the list. If
1313                  * it is the acceptor, then do the special_lookup to hash
1314                  * and find the real inp.
1315                  */
1316                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1317                         /* to is peer addr, from is my addr */
1318                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1319                             netp, inp->def_vrf_id);
1320                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1321                                 /* we have a locked tcb, lower refcount */
1322                                 SCTP_INP_DECR_REF(inp);
1323                         }
1324                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1325                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1326                                 SCTP_TCB_LOCK(locked_tcb);
1327                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1328                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1329                         }
1330                         SCTP_INP_INFO_RUNLOCK();
1331                         return (stcb);
1332                 } else {
1333                         SCTP_INP_WLOCK(inp);
1334                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1335                                 goto null_return;
1336                         }
1337                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1338                         if (stcb == NULL) {
1339                                 goto null_return;
1340                         }
1341                         SCTP_TCB_LOCK(stcb);
1342
1343                         if (stcb->rport != rport) {
1344                                 /* remote port does not match. */
1345                                 SCTP_TCB_UNLOCK(stcb);
1346                                 goto null_return;
1347                         }
1348                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1349                                 SCTP_TCB_UNLOCK(stcb);
1350                                 goto null_return;
1351                         }
1352                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1353                                 SCTP_TCB_UNLOCK(stcb);
1354                                 goto null_return;
1355                         }
1356                         /* now look at the list of remote addresses */
1357                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1358 #ifdef INVARIANTS
1359                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1360                                         panic("Corrupt net list");
1361                                 }
1362 #endif
1363                                 if (net->ro._l_addr.sa.sa_family !=
1364                                     remote->sa_family) {
1365                                         /* not the same family */
1366                                         continue;
1367                                 }
1368                                 switch (remote->sa_family) {
1369 #ifdef INET
1370                                 case AF_INET:
1371                                         {
1372                                                 struct sockaddr_in *sin,
1373                                                            *rsin;
1374
1375                                                 sin = (struct sockaddr_in *)
1376                                                     &net->ro._l_addr;
1377                                                 rsin = (struct sockaddr_in *)remote;
1378                                                 if (sin->sin_addr.s_addr ==
1379                                                     rsin->sin_addr.s_addr) {
1380                                                         /* found it */
1381                                                         if (netp != NULL) {
1382                                                                 *netp = net;
1383                                                         }
1384                                                         if (locked_tcb == NULL) {
1385                                                                 SCTP_INP_DECR_REF(inp);
1386                                                         } else if (locked_tcb != stcb) {
1387                                                                 SCTP_TCB_LOCK(locked_tcb);
1388                                                         }
1389                                                         if (locked_tcb) {
1390                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1391                                                         }
1392                                                         SCTP_INP_WUNLOCK(inp);
1393                                                         SCTP_INP_INFO_RUNLOCK();
1394                                                         return (stcb);
1395                                                 }
1396                                                 break;
1397                                         }
1398 #endif
1399 #ifdef INET6
1400                                 case AF_INET6:
1401                                         {
1402                                                 struct sockaddr_in6 *sin6,
1403                                                             *rsin6;
1404
1405                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1406                                                 rsin6 = (struct sockaddr_in6 *)remote;
1407                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1408                                                     rsin6)) {
1409                                                         /* found it */
1410                                                         if (netp != NULL) {
1411                                                                 *netp = net;
1412                                                         }
1413                                                         if (locked_tcb == NULL) {
1414                                                                 SCTP_INP_DECR_REF(inp);
1415                                                         } else if (locked_tcb != stcb) {
1416                                                                 SCTP_TCB_LOCK(locked_tcb);
1417                                                         }
1418                                                         if (locked_tcb) {
1419                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1420                                                         }
1421                                                         SCTP_INP_WUNLOCK(inp);
1422                                                         SCTP_INP_INFO_RUNLOCK();
1423                                                         return (stcb);
1424                                                 }
1425                                                 break;
1426                                         }
1427 #endif
1428                                 default:
1429                                         /* TSNH */
1430                                         break;
1431                                 }
1432                         }
1433                         SCTP_TCB_UNLOCK(stcb);
1434                 }
1435         } else {
1436                 SCTP_INP_WLOCK(inp);
1437                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1438                         goto null_return;
1439                 }
1440                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1441                     inp->sctp_hashmark)];
1442                 if (head == NULL) {
1443                         goto null_return;
1444                 }
1445                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1446                         if (stcb->rport != rport) {
1447                                 /* remote port does not match */
1448                                 continue;
1449                         }
1450                         SCTP_TCB_LOCK(stcb);
1451                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1452                                 SCTP_TCB_UNLOCK(stcb);
1453                                 continue;
1454                         }
1455                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1456                                 SCTP_TCB_UNLOCK(stcb);
1457                                 continue;
1458                         }
1459                         /* now look at the list of remote addresses */
1460                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1461 #ifdef INVARIANTS
1462                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1463                                         panic("Corrupt net list");
1464                                 }
1465 #endif
1466                                 if (net->ro._l_addr.sa.sa_family !=
1467                                     remote->sa_family) {
1468                                         /* not the same family */
1469                                         continue;
1470                                 }
1471                                 switch (remote->sa_family) {
1472 #ifdef INET
1473                                 case AF_INET:
1474                                         {
1475                                                 struct sockaddr_in *sin,
1476                                                            *rsin;
1477
1478                                                 sin = (struct sockaddr_in *)
1479                                                     &net->ro._l_addr;
1480                                                 rsin = (struct sockaddr_in *)remote;
1481                                                 if (sin->sin_addr.s_addr ==
1482                                                     rsin->sin_addr.s_addr) {
1483                                                         /* found it */
1484                                                         if (netp != NULL) {
1485                                                                 *netp = net;
1486                                                         }
1487                                                         if (locked_tcb == NULL) {
1488                                                                 SCTP_INP_DECR_REF(inp);
1489                                                         } else if (locked_tcb != stcb) {
1490                                                                 SCTP_TCB_LOCK(locked_tcb);
1491                                                         }
1492                                                         if (locked_tcb) {
1493                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1494                                                         }
1495                                                         SCTP_INP_WUNLOCK(inp);
1496                                                         SCTP_INP_INFO_RUNLOCK();
1497                                                         return (stcb);
1498                                                 }
1499                                                 break;
1500                                         }
1501 #endif
1502 #ifdef INET6
1503                                 case AF_INET6:
1504                                         {
1505                                                 struct sockaddr_in6 *sin6,
1506                                                             *rsin6;
1507
1508                                                 sin6 = (struct sockaddr_in6 *)
1509                                                     &net->ro._l_addr;
1510                                                 rsin6 = (struct sockaddr_in6 *)remote;
1511                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1512                                                     rsin6)) {
1513                                                         /* found it */
1514                                                         if (netp != NULL) {
1515                                                                 *netp = net;
1516                                                         }
1517                                                         if (locked_tcb == NULL) {
1518                                                                 SCTP_INP_DECR_REF(inp);
1519                                                         } else if (locked_tcb != stcb) {
1520                                                                 SCTP_TCB_LOCK(locked_tcb);
1521                                                         }
1522                                                         if (locked_tcb) {
1523                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1524                                                         }
1525                                                         SCTP_INP_WUNLOCK(inp);
1526                                                         SCTP_INP_INFO_RUNLOCK();
1527                                                         return (stcb);
1528                                                 }
1529                                                 break;
1530                                         }
1531 #endif
1532                                 default:
1533                                         /* TSNH */
1534                                         break;
1535                                 }
1536                         }
1537                         SCTP_TCB_UNLOCK(stcb);
1538                 }
1539         }
1540 null_return:
1541         /* clean up for returning null */
1542         if (locked_tcb) {
1543                 SCTP_TCB_LOCK(locked_tcb);
1544                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1545         }
1546         SCTP_INP_WUNLOCK(inp);
1547         SCTP_INP_INFO_RUNLOCK();
1548         /* not found */
1549         return (NULL);
1550 }
1551
1552
1553 /*
1554  * Find an association for a specific endpoint using the association id given
1555  * out in the COMM_UP notification
1556  */
1557 struct sctp_tcb *
1558 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1559 {
1560         /*
1561          * Use my the assoc_id to find a endpoint
1562          */
1563         struct sctpasochead *head;
1564         struct sctp_tcb *stcb;
1565         uint32_t id;
1566
1567         if (inp == NULL) {
1568                 SCTP_PRINTF("TSNH ep_associd\n");
1569                 return (NULL);
1570         }
1571         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1572                 SCTP_PRINTF("TSNH ep_associd0\n");
1573                 return (NULL);
1574         }
1575         id = (uint32_t) asoc_id;
1576         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1577         if (head == NULL) {
1578                 /* invalid id TSNH */
1579                 SCTP_PRINTF("TSNH ep_associd1\n");
1580                 return (NULL);
1581         }
1582         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1583                 if (stcb->asoc.assoc_id == id) {
1584                         if (inp != stcb->sctp_ep) {
1585                                 /*
1586                                  * some other guy has the same id active (id
1587                                  * collision ??).
1588                                  */
1589                                 SCTP_PRINTF("TSNH ep_associd2\n");
1590                                 continue;
1591                         }
1592                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1593                                 continue;
1594                         }
1595                         if (want_lock) {
1596                                 SCTP_TCB_LOCK(stcb);
1597                         }
1598                         return (stcb);
1599                 }
1600         }
1601         return (NULL);
1602 }
1603
1604
1605 struct sctp_tcb *
1606 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1607 {
1608         struct sctp_tcb *stcb;
1609
1610         SCTP_INP_RLOCK(inp);
1611         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1612         SCTP_INP_RUNLOCK(inp);
1613         return (stcb);
1614 }
1615
1616
1617 /*
1618  * Endpoint probe expects that the INP_INFO is locked.
1619  */
1620 static struct sctp_inpcb *
1621 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1622     uint16_t lport, uint32_t vrf_id)
1623 {
1624         struct sctp_inpcb *inp;
1625         struct sctp_laddr *laddr;
1626
1627 #ifdef INET
1628         struct sockaddr_in *sin;
1629
1630 #endif
1631 #ifdef INET6
1632         struct sockaddr_in6 *sin6;
1633         struct sockaddr_in6 *intf_addr6;
1634
1635 #endif
1636         int fnd;
1637
1638 #ifdef INET
1639         sin = NULL;
1640 #endif
1641 #ifdef INET6
1642         sin6 = NULL;
1643 #endif
1644         switch (nam->sa_family) {
1645 #ifdef INET
1646         case AF_INET:
1647                 sin = (struct sockaddr_in *)nam;
1648                 break;
1649 #endif
1650 #ifdef INET6
1651         case AF_INET6:
1652                 sin6 = (struct sockaddr_in6 *)nam;
1653                 break;
1654 #endif
1655         default:
1656                 /* unsupported family */
1657                 return (NULL);
1658         }
1659
1660         if (head == NULL)
1661                 return (NULL);
1662
1663         LIST_FOREACH(inp, head, sctp_hash) {
1664                 SCTP_INP_RLOCK(inp);
1665                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1666                         SCTP_INP_RUNLOCK(inp);
1667                         continue;
1668                 }
1669                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1670                     (inp->sctp_lport == lport)) {
1671                         /* got it */
1672                         switch (nam->sa_family) {
1673 #ifdef INET
1674                         case AF_INET:
1675                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1676                                     SCTP_IPV6_V6ONLY(inp)) {
1677                                         /*
1678                                          * IPv4 on a IPv6 socket with ONLY
1679                                          * IPv6 set
1680                                          */
1681                                         SCTP_INP_RUNLOCK(inp);
1682                                         continue;
1683                                 }
1684                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1685                                     &sin->sin_addr) != 0) {
1686                                         SCTP_INP_RUNLOCK(inp);
1687                                         continue;
1688                                 }
1689                                 break;
1690 #endif
1691 #ifdef INET6
1692                         case AF_INET6:
1693                                 /*
1694                                  * A V6 address and the endpoint is NOT
1695                                  * bound V6
1696                                  */
1697                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1698                                         SCTP_INP_RUNLOCK(inp);
1699                                         continue;
1700                                 }
1701                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1702                                     &sin6->sin6_addr) != 0) {
1703                                         SCTP_INP_RUNLOCK(inp);
1704                                         continue;
1705                                 }
1706                                 break;
1707 #endif
1708                         default:
1709                                 break;
1710                         }
1711                         /* does a VRF id match? */
1712                         fnd = 0;
1713                         if (inp->def_vrf_id == vrf_id)
1714                                 fnd = 1;
1715
1716                         SCTP_INP_RUNLOCK(inp);
1717                         if (!fnd)
1718                                 continue;
1719                         return (inp);
1720                 }
1721                 SCTP_INP_RUNLOCK(inp);
1722         }
1723         switch (nam->sa_family) {
1724 #ifdef INET
1725         case AF_INET:
1726                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1727                         /* Can't hunt for one that has no address specified */
1728                         return (NULL);
1729                 }
1730                 break;
1731 #endif
1732 #ifdef INET6
1733         case AF_INET6:
1734                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1735                         /* Can't hunt for one that has no address specified */
1736                         return (NULL);
1737                 }
1738                 break;
1739 #endif
1740         default:
1741                 break;
1742         }
1743         /*
1744          * ok, not bound to all so see if we can find a EP bound to this
1745          * address.
1746          */
1747         LIST_FOREACH(inp, head, sctp_hash) {
1748                 SCTP_INP_RLOCK(inp);
1749                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1750                         SCTP_INP_RUNLOCK(inp);
1751                         continue;
1752                 }
1753                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1754                         SCTP_INP_RUNLOCK(inp);
1755                         continue;
1756                 }
1757                 /*
1758                  * Ok this could be a likely candidate, look at all of its
1759                  * addresses
1760                  */
1761                 if (inp->sctp_lport != lport) {
1762                         SCTP_INP_RUNLOCK(inp);
1763                         continue;
1764                 }
1765                 /* does a VRF id match? */
1766                 fnd = 0;
1767                 if (inp->def_vrf_id == vrf_id)
1768                         fnd = 1;
1769
1770                 if (!fnd) {
1771                         SCTP_INP_RUNLOCK(inp);
1772                         continue;
1773                 }
1774                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1775                         if (laddr->ifa == NULL) {
1776                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1777                                     __FUNCTION__);
1778                                 continue;
1779                         }
1780                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1781                             (void *)laddr->ifa);
1782                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1783                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1784                                 continue;
1785                         }
1786                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1787                                 /* possible, see if it matches */
1788                                 switch (nam->sa_family) {
1789 #ifdef INET
1790                                 case AF_INET:
1791                                         if (sin->sin_addr.s_addr ==
1792                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1793                                                 SCTP_INP_RUNLOCK(inp);
1794                                                 return (inp);
1795                                         }
1796                                         break;
1797 #endif
1798 #ifdef INET6
1799                                 case AF_INET6:
1800                                         intf_addr6 = &laddr->ifa->address.sin6;
1801                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1802                                             intf_addr6)) {
1803                                                 SCTP_INP_RUNLOCK(inp);
1804                                                 return (inp);
1805                                         }
1806                                         break;
1807 #endif
1808                                 }
1809                         }
1810                 }
1811                 SCTP_INP_RUNLOCK(inp);
1812         }
1813         return (NULL);
1814 }
1815
1816
1817 static struct sctp_inpcb *
1818 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1819 {
1820         struct sctppcbhead *head;
1821         struct sctp_inpcb *t_inp;
1822         int fnd;
1823
1824         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1825             SCTP_BASE_INFO(hashmark))];
1826         LIST_FOREACH(t_inp, head, sctp_hash) {
1827                 if (t_inp->sctp_lport != lport) {
1828                         continue;
1829                 }
1830                 /* is it in the VRF in question */
1831                 fnd = 0;
1832                 if (t_inp->def_vrf_id == vrf_id)
1833                         fnd = 1;
1834                 if (!fnd)
1835                         continue;
1836
1837                 /* This one is in use. */
1838                 /* check the v6/v4 binding issue */
1839                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1840                     SCTP_IPV6_V6ONLY(t_inp)) {
1841                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1842                                 /* collision in V6 space */
1843                                 return (t_inp);
1844                         } else {
1845                                 /* inp is BOUND_V4 no conflict */
1846                                 continue;
1847                         }
1848                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1849                         /* t_inp is bound v4 and v6, conflict always */
1850                         return (t_inp);
1851                 } else {
1852                         /* t_inp is bound only V4 */
1853                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1854                             SCTP_IPV6_V6ONLY(inp)) {
1855                                 /* no conflict */
1856                                 continue;
1857                         }
1858                         /* else fall through to conflict */
1859                 }
1860                 return (t_inp);
1861         }
1862         return (NULL);
1863 }
1864
1865
1866 int
1867 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1868 {
1869         /* For 1-2-1 with port reuse */
1870         struct sctppcbhead *head;
1871         struct sctp_inpcb *tinp;
1872
1873         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1874                 /* only works with port reuse on */
1875                 return (-1);
1876         }
1877         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1878                 return (0);
1879         }
1880         SCTP_INP_RUNLOCK(inp);
1881         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1882             SCTP_BASE_INFO(hashmark))];
1883         /* Kick out all non-listeners to the TCP hash */
1884         LIST_FOREACH(tinp, head, sctp_hash) {
1885                 if (tinp->sctp_lport != inp->sctp_lport) {
1886                         continue;
1887                 }
1888                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1889                         continue;
1890                 }
1891                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1892                         continue;
1893                 }
1894                 if (tinp->sctp_socket->so_qlimit) {
1895                         continue;
1896                 }
1897                 SCTP_INP_WLOCK(tinp);
1898                 LIST_REMOVE(tinp, sctp_hash);
1899                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1900                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1901                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1902                 SCTP_INP_WUNLOCK(tinp);
1903         }
1904         SCTP_INP_WLOCK(inp);
1905         /* Pull from where he was */
1906         LIST_REMOVE(inp, sctp_hash);
1907         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1908         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1909         LIST_INSERT_HEAD(head, inp, sctp_hash);
1910         SCTP_INP_WUNLOCK(inp);
1911         SCTP_INP_RLOCK(inp);
1912         return (0);
1913 }
1914
1915
1916 struct sctp_inpcb *
1917 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1918     uint32_t vrf_id)
1919 {
1920         /*
1921          * First we check the hash table to see if someone has this port
1922          * bound with just the port.
1923          */
1924         struct sctp_inpcb *inp;
1925         struct sctppcbhead *head;
1926         int lport;
1927         unsigned int i;
1928
1929 #ifdef INET
1930         struct sockaddr_in *sin;
1931
1932 #endif
1933 #ifdef INET6
1934         struct sockaddr_in6 *sin6;
1935
1936 #endif
1937
1938         switch (nam->sa_family) {
1939 #ifdef INET
1940         case AF_INET:
1941                 sin = (struct sockaddr_in *)nam;
1942                 lport = sin->sin_port;
1943                 break;
1944 #endif
1945 #ifdef INET6
1946         case AF_INET6:
1947                 sin6 = (struct sockaddr_in6 *)nam;
1948                 lport = sin6->sin6_port;
1949                 break;
1950 #endif
1951         default:
1952                 return (NULL);
1953         }
1954         /*
1955          * I could cheat here and just cast to one of the types but we will
1956          * do it right. It also provides the check against an Unsupported
1957          * type too.
1958          */
1959         /* Find the head of the ALLADDR chain */
1960         if (have_lock == 0) {
1961                 SCTP_INP_INFO_RLOCK();
1962         }
1963         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1964             SCTP_BASE_INFO(hashmark))];
1965         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1966
1967         /*
1968          * If the TCP model exists it could be that the main listening
1969          * endpoint is gone but there still exists a connected socket for
1970          * this guy. If so we can return the first one that we find. This
1971          * may NOT be the correct one so the caller should be wary on the
1972          * returned INP. Currently the only caller that sets find_tcp_pool
1973          * is in bindx where we are verifying that a user CAN bind the
1974          * address. He either has bound it already, or someone else has, or
1975          * its open to bind, so this is good enough.
1976          */
1977         if (inp == NULL && find_tcp_pool) {
1978                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1979                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1980                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1981                         if (inp) {
1982                                 break;
1983                         }
1984                 }
1985         }
1986         if (inp) {
1987                 SCTP_INP_INCR_REF(inp);
1988         }
1989         if (have_lock == 0) {
1990                 SCTP_INP_INFO_RUNLOCK();
1991         }
1992         return (inp);
1993 }
1994
1995
1996 /*
1997  * Find an association for an endpoint with the pointer to whom you want to
1998  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1999  * need to change the *to to some other struct like a mbuf...
2000  */
2001 struct sctp_tcb *
2002 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
2003     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
2004     uint32_t vrf_id)
2005 {
2006         struct sctp_inpcb *inp = NULL;
2007         struct sctp_tcb *stcb;
2008
2009         SCTP_INP_INFO_RLOCK();
2010         if (find_tcp_pool) {
2011                 if (inp_p != NULL) {
2012                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2013                             vrf_id);
2014                 } else {
2015                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2016                             vrf_id);
2017                 }
2018                 if (stcb != NULL) {
2019                         SCTP_INP_INFO_RUNLOCK();
2020                         return (stcb);
2021                 }
2022         }
2023         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2024         if (inp_p != NULL) {
2025                 *inp_p = inp;
2026         }
2027         SCTP_INP_INFO_RUNLOCK();
2028         if (inp == NULL) {
2029                 return (NULL);
2030         }
2031         /*
2032          * ok, we have an endpoint, now lets find the assoc for it (if any)
2033          * we now place the source address or from in the to of the find
2034          * endpoint call. Since in reality this chain is used from the
2035          * inbound packet side.
2036          */
2037         if (inp_p != NULL) {
2038                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2039                     NULL);
2040         } else {
2041                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2042                     NULL);
2043         }
2044         return (stcb);
2045 }
2046
2047
2048 /*
2049  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2050  * find all addresses that the sender has specified in any address list. Each
2051  * address will be used to lookup the TCB and see if one exits.
2052  */
2053 static struct sctp_tcb *
2054 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2055     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2056     struct sockaddr *dst)
2057 {
2058         struct sctp_paramhdr *phdr, parm_buf;
2059
2060 #if defined(INET) || defined(INET6)
2061         struct sctp_tcb *stcb;
2062         uint16_t ptype;
2063
2064 #endif
2065         uint16_t plen;
2066
2067 #ifdef INET
2068         struct sockaddr_in sin4;
2069
2070 #endif
2071 #ifdef INET6
2072         struct sockaddr_in6 sin6;
2073
2074 #endif
2075
2076 #ifdef INET
2077         memset(&sin4, 0, sizeof(sin4));
2078         sin4.sin_len = sizeof(sin4);
2079         sin4.sin_family = AF_INET;
2080         sin4.sin_port = sh->src_port;
2081 #endif
2082 #ifdef INET6
2083         memset(&sin6, 0, sizeof(sin6));
2084         sin6.sin6_len = sizeof(sin6);
2085         sin6.sin6_family = AF_INET6;
2086         sin6.sin6_port = sh->src_port;
2087 #endif
2088
2089         offset += sizeof(struct sctp_init_chunk);
2090
2091         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
2092         while (phdr != NULL) {
2093                 /* now we must see if we want the parameter */
2094 #if defined(INET) || defined(INET6)
2095                 ptype = ntohs(phdr->param_type);
2096 #endif
2097                 plen = ntohs(phdr->param_length);
2098                 if (plen == 0) {
2099                         break;
2100                 }
2101 #ifdef INET
2102                 if (ptype == SCTP_IPV4_ADDRESS &&
2103                     plen == sizeof(struct sctp_ipv4addr_param)) {
2104                         /* Get the rest of the address */
2105                         struct sctp_ipv4addr_param ip4_parm, *p4;
2106
2107                         phdr = sctp_get_next_param(m, offset,
2108                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2109                         if (phdr == NULL) {
2110                                 return (NULL);
2111                         }
2112                         p4 = (struct sctp_ipv4addr_param *)phdr;
2113                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2114                         /* look it up */
2115                         stcb = sctp_findassociation_ep_addr(inp_p,
2116                             (struct sockaddr *)&sin4, netp, dst, NULL);
2117                         if (stcb != NULL) {
2118                                 return (stcb);
2119                         }
2120                 }
2121 #endif
2122 #ifdef INET6
2123                 if (ptype == SCTP_IPV6_ADDRESS &&
2124                     plen == sizeof(struct sctp_ipv6addr_param)) {
2125                         /* Get the rest of the address */
2126                         struct sctp_ipv6addr_param ip6_parm, *p6;
2127
2128                         phdr = sctp_get_next_param(m, offset,
2129                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
2130                         if (phdr == NULL) {
2131                                 return (NULL);
2132                         }
2133                         p6 = (struct sctp_ipv6addr_param *)phdr;
2134                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2135                         /* look it up */
2136                         stcb = sctp_findassociation_ep_addr(inp_p,
2137                             (struct sockaddr *)&sin6, netp, dst, NULL);
2138                         if (stcb != NULL) {
2139                                 return (stcb);
2140                         }
2141                 }
2142 #endif
2143                 offset += SCTP_SIZE32(plen);
2144                 phdr = sctp_get_next_param(m, offset, &parm_buf,
2145                     sizeof(parm_buf));
2146         }
2147         return (NULL);
2148 }
2149
2150 static struct sctp_tcb *
2151 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2152     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2153     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2154 {
2155         /*
2156          * Use my vtag to hash. If we find it we then verify the source addr
2157          * is in the assoc. If all goes well we save a bit on rec of a
2158          * packet.
2159          */
2160         struct sctpasochead *head;
2161         struct sctp_nets *net;
2162         struct sctp_tcb *stcb;
2163
2164         SCTP_INP_INFO_RLOCK();
2165         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2166             SCTP_BASE_INFO(hashasocmark))];
2167         if (head == NULL) {
2168                 /* invalid vtag */
2169                 SCTP_INP_INFO_RUNLOCK();
2170                 return (NULL);
2171         }
2172         LIST_FOREACH(stcb, head, sctp_asocs) {
2173                 SCTP_INP_RLOCK(stcb->sctp_ep);
2174                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2175                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2176                         continue;
2177                 }
2178                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2179                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2180                         continue;
2181                 }
2182                 SCTP_TCB_LOCK(stcb);
2183                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2184                 if (stcb->asoc.my_vtag == vtag) {
2185                         /* candidate */
2186                         if (stcb->rport != rport) {
2187                                 SCTP_TCB_UNLOCK(stcb);
2188                                 continue;
2189                         }
2190                         if (stcb->sctp_ep->sctp_lport != lport) {
2191                                 SCTP_TCB_UNLOCK(stcb);
2192                                 continue;
2193                         }
2194                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2195                                 SCTP_TCB_UNLOCK(stcb);
2196                                 continue;
2197                         }
2198                         /* RRS:Need toaddr check here */
2199                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2200                                 /* Endpoint does not own this address */
2201                                 SCTP_TCB_UNLOCK(stcb);
2202                                 continue;
2203                         }
2204                         if (remote_tag) {
2205                                 /*
2206                                  * If we have both vtags that's all we match
2207                                  * on
2208                                  */
2209                                 if (stcb->asoc.peer_vtag == remote_tag) {
2210                                         /*
2211                                          * If both tags match we consider it
2212                                          * conclusive and check NO
2213                                          * source/destination addresses
2214                                          */
2215                                         goto conclusive;
2216                                 }
2217                         }
2218                         if (skip_src_check) {
2219                 conclusive:
2220                                 if (from) {
2221                                         *netp = sctp_findnet(stcb, from);
2222                                 } else {
2223                                         *netp = NULL;   /* unknown */
2224                                 }
2225                                 if (inp_p)
2226                                         *inp_p = stcb->sctp_ep;
2227                                 SCTP_INP_INFO_RUNLOCK();
2228                                 return (stcb);
2229                         }
2230                         net = sctp_findnet(stcb, from);
2231                         if (net) {
2232                                 /* yep its him. */
2233                                 *netp = net;
2234                                 SCTP_STAT_INCR(sctps_vtagexpress);
2235                                 *inp_p = stcb->sctp_ep;
2236                                 SCTP_INP_INFO_RUNLOCK();
2237                                 return (stcb);
2238                         } else {
2239                                 /*
2240                                  * not him, this should only happen in rare
2241                                  * cases so I peg it.
2242                                  */
2243                                 SCTP_STAT_INCR(sctps_vtagbogus);
2244                         }
2245                 }
2246                 SCTP_TCB_UNLOCK(stcb);
2247         }
2248         SCTP_INP_INFO_RUNLOCK();
2249         return (NULL);
2250 }
2251
2252
2253 /*
2254  * Find an association with the pointer to the inbound IP packet. This can be
2255  * a IPv4 or IPv6 packet.
2256  */
2257 struct sctp_tcb *
2258 sctp_findassociation_addr(struct mbuf *m, int offset,
2259     struct sockaddr *src, struct sockaddr *dst,
2260     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2261     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2262 {
2263         int find_tcp_pool;
2264         struct sctp_tcb *stcb;
2265         struct sctp_inpcb *inp;
2266
2267         if (sh->v_tag) {
2268                 /* we only go down this path if vtag is non-zero */
2269                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2270                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2271                 if (stcb) {
2272                         return (stcb);
2273                 }
2274         }
2275         find_tcp_pool = 0;
2276         if ((ch->chunk_type != SCTP_INITIATION) &&
2277             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2278             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2279             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2280                 /* Other chunk types go to the tcp pool. */
2281                 find_tcp_pool = 1;
2282         }
2283         if (inp_p) {
2284                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2285                     find_tcp_pool, vrf_id);
2286                 inp = *inp_p;
2287         } else {
2288                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2289                     find_tcp_pool, vrf_id);
2290         }
2291         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2292         if (stcb == NULL && inp) {
2293                 /* Found a EP but not this address */
2294                 if ((ch->chunk_type == SCTP_INITIATION) ||
2295                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2296                         /*-
2297                          * special hook, we do NOT return linp or an
2298                          * association that is linked to an existing
2299                          * association that is under the TCP pool (i.e. no
2300                          * listener exists). The endpoint finding routine
2301                          * will always find a listener before examining the
2302                          * TCP pool.
2303                          */
2304                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2305                                 if (inp_p) {
2306                                         *inp_p = NULL;
2307                                 }
2308                                 return (NULL);
2309                         }
2310                         stcb = sctp_findassociation_special_addr(m,
2311                             offset, sh, &inp, netp, dst);
2312                         if (inp_p != NULL) {
2313                                 *inp_p = inp;
2314                         }
2315                 }
2316         }
2317         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2318         return (stcb);
2319 }
2320
2321 /*
2322  * lookup an association by an ASCONF lookup address.
2323  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2324  */
2325 struct sctp_tcb *
2326 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2327     struct sockaddr *dst, struct sctphdr *sh,
2328     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2329 {
2330         struct sctp_tcb *stcb;
2331         struct sockaddr_storage remote_store;
2332         struct sctp_paramhdr parm_buf, *phdr;
2333         int ptype;
2334         int zero_address = 0;
2335
2336 #ifdef INET
2337         struct sockaddr_in *sin;
2338
2339 #endif
2340 #ifdef INET6
2341         struct sockaddr_in6 *sin6;
2342
2343 #endif
2344
2345         memset(&remote_store, 0, sizeof(remote_store));
2346         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2347             &parm_buf, sizeof(struct sctp_paramhdr));
2348         if (phdr == NULL) {
2349                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2350                     __FUNCTION__);
2351                 return NULL;
2352         }
2353         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2354         /* get the correlation address */
2355         switch (ptype) {
2356 #ifdef INET6
2357         case SCTP_IPV6_ADDRESS:
2358                 {
2359                         /* ipv6 address param */
2360                         struct sctp_ipv6addr_param *p6, p6_buf;
2361
2362                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2363                                 return NULL;
2364                         }
2365                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2366                             offset + sizeof(struct sctp_asconf_chunk),
2367                             &p6_buf.ph, sizeof(*p6));
2368                         if (p6 == NULL) {
2369                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2370                                     __FUNCTION__);
2371                                 return (NULL);
2372                         }
2373                         sin6 = (struct sockaddr_in6 *)&remote_store;
2374                         sin6->sin6_family = AF_INET6;
2375                         sin6->sin6_len = sizeof(*sin6);
2376                         sin6->sin6_port = sh->src_port;
2377                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2378                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2379                                 zero_address = 1;
2380                         break;
2381                 }
2382 #endif
2383 #ifdef INET
2384         case SCTP_IPV4_ADDRESS:
2385                 {
2386                         /* ipv4 address param */
2387                         struct sctp_ipv4addr_param *p4, p4_buf;
2388
2389                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2390                                 return NULL;
2391                         }
2392                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2393                             offset + sizeof(struct sctp_asconf_chunk),
2394                             &p4_buf.ph, sizeof(*p4));
2395                         if (p4 == NULL) {
2396                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2397                                     __FUNCTION__);
2398                                 return (NULL);
2399                         }
2400                         sin = (struct sockaddr_in *)&remote_store;
2401                         sin->sin_family = AF_INET;
2402                         sin->sin_len = sizeof(*sin);
2403                         sin->sin_port = sh->src_port;
2404                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2405                         if (sin->sin_addr.s_addr == INADDR_ANY)
2406                                 zero_address = 1;
2407                         break;
2408                 }
2409 #endif
2410         default:
2411                 /* invalid address param type */
2412                 return NULL;
2413         }
2414
2415         if (zero_address) {
2416                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2417                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2418                 if (stcb != NULL) {
2419                         SCTP_INP_DECR_REF(*inp_p);
2420                 }
2421         } else {
2422                 stcb = sctp_findassociation_ep_addr(inp_p,
2423                     (struct sockaddr *)&remote_store, netp,
2424                     dst, NULL);
2425         }
2426         return (stcb);
2427 }
2428
2429
2430 /*
2431  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2432  * addresses. This way if we don't get a bind we by default pick a ephemeral
2433  * port with all addresses bound.
2434  */
2435 int
2436 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2437 {
2438         /*
2439          * we get called when a new endpoint starts up. We need to allocate
2440          * the sctp_inpcb structure from the zone and init it. Mark it as
2441          * unbound and find a port that we can use as an ephemeral with
2442          * INADDR_ANY. If the user binds later no problem we can then add in
2443          * the specific addresses. And setup the default parameters for the
2444          * EP.
2445          */
2446         int i, error;
2447         struct sctp_inpcb *inp;
2448         struct sctp_pcb *m;
2449         struct timeval time;
2450         sctp_sharedkey_t *null_key;
2451
2452         error = 0;
2453
2454         SCTP_INP_INFO_WLOCK();
2455         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2456         if (inp == NULL) {
2457                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2458                 SCTP_INP_INFO_WUNLOCK();
2459                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2460                 return (ENOBUFS);
2461         }
2462         /* zap it */
2463         bzero(inp, sizeof(*inp));
2464
2465         /* bump generations */
2466         /* setup socket pointers */
2467         inp->sctp_socket = so;
2468         inp->ip_inp.inp.inp_socket = so;
2469         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2470 #ifdef INET6
2471         if (INP_SOCKAF(so) == AF_INET6) {
2472                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2473                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2474                 }
2475                 if (MODULE_GLOBAL(ip6_v6only)) {
2476                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2477                 }
2478         }
2479 #endif
2480         inp->sctp_associd_counter = 1;
2481         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2482         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2483         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2484         inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable);
2485         /* init the small hash table we use to track asocid <-> tcb */
2486         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2487         if (inp->sctp_asocidhash == NULL) {
2488                 crfree(inp->ip_inp.inp.inp_cred);
2489                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2490                 SCTP_INP_INFO_WUNLOCK();
2491                 return (ENOBUFS);
2492         }
2493 #ifdef IPSEC
2494         {
2495                 struct inpcbpolicy *pcb_sp = NULL;
2496
2497                 error = ipsec_init_policy(so, &pcb_sp);
2498                 /* Arrange to share the policy */
2499                 inp->ip_inp.inp.inp_sp = pcb_sp;
2500                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2501         }
2502         if (error != 0) {
2503                 crfree(inp->ip_inp.inp.inp_cred);
2504                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2505                 SCTP_INP_INFO_WUNLOCK();
2506                 return error;
2507         }
2508 #endif                          /* IPSEC */
2509         SCTP_INCR_EP_COUNT();
2510         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2511         SCTP_INP_INFO_WUNLOCK();
2512
2513         so->so_pcb = (caddr_t)inp;
2514
2515         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2516                 /* UDP style socket */
2517                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2518                     SCTP_PCB_FLAGS_UNBOUND);
2519                 /* Be sure it is NON-BLOCKING IO for UDP */
2520                 /* SCTP_SET_SO_NBIO(so); */
2521         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2522                 /* TCP style socket */
2523                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2524                     SCTP_PCB_FLAGS_UNBOUND);
2525                 /* Be sure we have blocking IO by default */
2526                 SCTP_CLEAR_SO_NBIO(so);
2527         } else {
2528                 /*
2529                  * unsupported socket type (RAW, etc)- in case we missed it
2530                  * in protosw
2531                  */
2532                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2533                 so->so_pcb = NULL;
2534                 crfree(inp->ip_inp.inp.inp_cred);
2535                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2536                 return (EOPNOTSUPP);
2537         }
2538         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2539                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2540                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2541         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2542                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2543                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2544         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2545                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2546                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2547         }
2548         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2549             &inp->sctp_hashmark);
2550         if (inp->sctp_tcbhash == NULL) {
2551                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2552                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2553                 so->so_pcb = NULL;
2554                 crfree(inp->ip_inp.inp.inp_cred);
2555                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2556                 return (ENOBUFS);
2557         }
2558         inp->def_vrf_id = vrf_id;
2559
2560         SCTP_INP_INFO_WLOCK();
2561         SCTP_INP_LOCK_INIT(inp);
2562         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2563         SCTP_INP_READ_INIT(inp);
2564         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2565         /* lock the new ep */
2566         SCTP_INP_WLOCK(inp);
2567
2568         /* add it to the info area */
2569         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2570         SCTP_INP_INFO_WUNLOCK();
2571
2572         TAILQ_INIT(&inp->read_queue);
2573         LIST_INIT(&inp->sctp_addr_list);
2574
2575         LIST_INIT(&inp->sctp_asoc_list);
2576
2577 #ifdef SCTP_TRACK_FREED_ASOCS
2578         /* TEMP CODE */
2579         LIST_INIT(&inp->sctp_asoc_free_list);
2580 #endif
2581         /* Init the timer structure for signature change */
2582         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2583         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2584
2585         /* now init the actual endpoint default data */
2586         m = &inp->sctp_ep;
2587
2588         /* setup the base timeout information */
2589         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2590         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2591         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2592         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2593         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2594         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2595         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2596         /* all max/min max are in ms */
2597         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2598         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2599         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2600         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2601         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2602         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2603         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2604         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2605         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2606         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2607         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2608         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2609         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2610
2611         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2612         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2613         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2614         /* number of streams to pre-open on a association */
2615         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2616
2617         /* Add adaptation cookie */
2618         m->adaptation_layer_indicator = 0;
2619         m->adaptation_layer_indicator_provided = 0;
2620
2621         /* seed random number generator */
2622         m->random_counter = 1;
2623         m->store_at = SCTP_SIGNATURE_SIZE;
2624         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2625         sctp_fill_random_store(m);
2626
2627         /* Minimum cookie size */
2628         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2629             sizeof(struct sctp_state_cookie);
2630         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2631
2632         /* Setup the initial secret */
2633         (void)SCTP_GETTIME_TIMEVAL(&time);
2634         m->time_of_secret_change = time.tv_sec;
2635
2636         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2637                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2638         }
2639         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2640
2641         /* How long is a cookie good for ? */
2642         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2643         /*
2644          * Initialize authentication parameters
2645          */
2646         m->local_hmacs = sctp_default_supported_hmaclist();
2647         m->local_auth_chunks = sctp_alloc_chunklist();
2648         m->default_dscp = 0;
2649 #ifdef INET6
2650         m->default_flowlabel = 0;
2651 #endif
2652         m->port = 0;            /* encapsulation disabled by default */
2653         sctp_auth_set_default_chunks(m->local_auth_chunks);
2654         LIST_INIT(&m->shared_keys);
2655         /* add default NULL key as key id 0 */
2656         null_key = sctp_alloc_sharedkey();
2657         sctp_insert_sharedkey(&m->shared_keys, null_key);
2658         SCTP_INP_WUNLOCK(inp);
2659 #ifdef SCTP_LOG_CLOSING
2660         sctp_log_closing(inp, NULL, 12);
2661 #endif
2662         return (error);
2663 }
2664
2665
2666 void
2667 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2668     struct sctp_tcb *stcb)
2669 {
2670         struct sctp_nets *net;
2671         uint16_t lport, rport;
2672         struct sctppcbhead *head;
2673         struct sctp_laddr *laddr, *oladdr;
2674
2675         atomic_add_int(&stcb->asoc.refcnt, 1);
2676         SCTP_TCB_UNLOCK(stcb);
2677         SCTP_INP_INFO_WLOCK();
2678         SCTP_INP_WLOCK(old_inp);
2679         SCTP_INP_WLOCK(new_inp);
2680         SCTP_TCB_LOCK(stcb);
2681         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2682
2683         new_inp->sctp_ep.time_of_secret_change =
2684             old_inp->sctp_ep.time_of_secret_change;
2685         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2686             sizeof(old_inp->sctp_ep.secret_key));
2687         new_inp->sctp_ep.current_secret_number =
2688             old_inp->sctp_ep.current_secret_number;
2689         new_inp->sctp_ep.last_secret_number =
2690             old_inp->sctp_ep.last_secret_number;
2691         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2692
2693         /* make it so new data pours into the new socket */
2694         stcb->sctp_socket = new_inp->sctp_socket;
2695         stcb->sctp_ep = new_inp;
2696
2697         /* Copy the port across */
2698         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2699         rport = stcb->rport;
2700         /* Pull the tcb from the old association */
2701         LIST_REMOVE(stcb, sctp_tcbhash);
2702         LIST_REMOVE(stcb, sctp_tcblist);
2703         if (stcb->asoc.in_asocid_hash) {
2704                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2705         }
2706         /* Now insert the new_inp into the TCP connected hash */
2707         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2708
2709         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2710         /* Its safe to access */
2711         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2712
2713         /* Now move the tcb into the endpoint list */
2714         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2715         /*
2716          * Question, do we even need to worry about the ep-hash since we
2717          * only have one connection? Probably not :> so lets get rid of it
2718          * and not suck up any kernel memory in that.
2719          */
2720         if (stcb->asoc.in_asocid_hash) {
2721                 struct sctpasochead *lhd;
2722
2723                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2724                     new_inp->hashasocidmark)];
2725                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2726         }
2727         /* Ok. Let's restart timer. */
2728         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2729                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2730                     stcb, net);
2731         }
2732
2733         SCTP_INP_INFO_WUNLOCK();
2734         if (new_inp->sctp_tcbhash != NULL) {
2735                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2736                 new_inp->sctp_tcbhash = NULL;
2737         }
2738         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2739                 /* Subset bound, so copy in the laddr list from the old_inp */
2740                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2741                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2742                         if (laddr == NULL) {
2743                                 /*
2744                                  * Gak, what can we do? This assoc is really
2745                                  * HOSED. We probably should send an abort
2746                                  * here.
2747                                  */
2748                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2749                                 continue;
2750                         }
2751                         SCTP_INCR_LADDR_COUNT();
2752                         bzero(laddr, sizeof(*laddr));
2753                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2754                         laddr->ifa = oladdr->ifa;
2755                         atomic_add_int(&laddr->ifa->refcount, 1);
2756                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2757                             sctp_nxt_addr);
2758                         new_inp->laddr_count++;
2759                         if (oladdr == stcb->asoc.last_used_address) {
2760                                 stcb->asoc.last_used_address = laddr;
2761                         }
2762                 }
2763         }
2764         /*
2765          * Now any running timers need to be adjusted since we really don't
2766          * care if they are running or not just blast in the new_inp into
2767          * all of them.
2768          */
2769
2770         stcb->asoc.dack_timer.ep = (void *)new_inp;
2771         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2772         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2773         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2774         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2775         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2776         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2777         /* now what about the nets? */
2778         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2779                 net->pmtu_timer.ep = (void *)new_inp;
2780                 net->hb_timer.ep = (void *)new_inp;
2781                 net->rxt_timer.ep = (void *)new_inp;
2782         }
2783         SCTP_INP_WUNLOCK(new_inp);
2784         SCTP_INP_WUNLOCK(old_inp);
2785 }
2786
2787
2788
2789
2790 /* sctp_ifap is used to bypass normal local address validation checks */
2791 int
2792 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2793     struct sctp_ifa *sctp_ifap, struct thread *p)
2794 {
2795         /* bind a ep to a socket address */
2796         struct sctppcbhead *head;
2797         struct sctp_inpcb *inp, *inp_tmp;
2798         struct inpcb *ip_inp;
2799         int port_reuse_active = 0;
2800         int bindall;
2801         uint16_t lport;
2802         int error;
2803         uint32_t vrf_id;
2804
2805         lport = 0;
2806         bindall = 1;
2807         inp = (struct sctp_inpcb *)so->so_pcb;
2808         ip_inp = (struct inpcb *)so->so_pcb;
2809 #ifdef SCTP_DEBUG
2810         if (addr) {
2811                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2812                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2813                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2814                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2815         }
2816 #endif
2817         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2818                 /* already did a bind, subsequent binds NOT allowed ! */
2819                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2820                 return (EINVAL);
2821         }
2822 #ifdef INVARIANTS
2823         if (p == NULL)
2824                 panic("null proc/thread");
2825 #endif
2826         if (addr != NULL) {
2827                 switch (addr->sa_family) {
2828 #ifdef INET
2829                 case AF_INET:
2830                         {
2831                                 struct sockaddr_in *sin;
2832
2833                                 /* IPV6_V6ONLY socket? */
2834                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2835                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2836                                         return (EINVAL);
2837                                 }
2838                                 if (addr->sa_len != sizeof(*sin)) {
2839                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2840                                         return (EINVAL);
2841                                 }
2842                                 sin = (struct sockaddr_in *)addr;
2843                                 lport = sin->sin_port;
2844                                 /*
2845                                  * For LOOPBACK the prison_local_ip4() call
2846                                  * will transmute the ip address to the
2847                                  * proper value.
2848                                  */
2849                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2850                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2851                                         return (error);
2852                                 }
2853                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2854                                         bindall = 0;
2855                                 }
2856                                 break;
2857                         }
2858 #endif
2859 #ifdef INET6
2860                 case AF_INET6:
2861                         {
2862                                 /*
2863                                  * Only for pure IPv6 Address. (No IPv4
2864                                  * Mapped!)
2865                                  */
2866                                 struct sockaddr_in6 *sin6;
2867
2868                                 sin6 = (struct sockaddr_in6 *)addr;
2869
2870                                 if (addr->sa_len != sizeof(*sin6)) {
2871                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2872                                         return (EINVAL);
2873                                 }
2874                                 lport = sin6->sin6_port;
2875                                 /*
2876                                  * For LOOPBACK the prison_local_ip6() call
2877                                  * will transmute the ipv6 address to the
2878                                  * proper value.
2879                                  */
2880                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2881                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2882                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2883                                         return (error);
2884                                 }
2885                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2886                                         bindall = 0;
2887                                         /* KAME hack: embed scopeid */
2888                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2889                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2890                                                 return (EINVAL);
2891                                         }
2892                                 }
2893                                 /* this must be cleared for ifa_ifwithaddr() */
2894                                 sin6->sin6_scope_id = 0;
2895                                 break;
2896                         }
2897 #endif
2898                 default:
2899                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2900                         return (EAFNOSUPPORT);
2901                 }
2902         }
2903         SCTP_INP_INFO_WLOCK();
2904         SCTP_INP_WLOCK(inp);
2905         /* Setup a vrf_id to be the default for the non-bind-all case. */
2906         vrf_id = inp->def_vrf_id;
2907
2908         /* increase our count due to the unlock we do */
2909         SCTP_INP_INCR_REF(inp);
2910         if (lport) {
2911                 /*
2912                  * Did the caller specify a port? if so we must see if an ep
2913                  * already has this one bound.
2914                  */
2915                 /* got to be root to get at low ports */
2916                 if (ntohs(lport) < IPPORT_RESERVED) {
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                                 return (error);
2924                         }
2925                 }
2926                 SCTP_INP_WUNLOCK(inp);
2927                 if (bindall) {
2928                         vrf_id = inp->def_vrf_id;
2929                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2930                         if (inp_tmp != NULL) {
2931                                 /*
2932                                  * lock guy returned and lower count note
2933                                  * that we are not bound so inp_tmp should
2934                                  * NEVER be inp. And it is this inp
2935                                  * (inp_tmp) that gets the reference bump,
2936                                  * so we must lower it.
2937                                  */
2938                                 SCTP_INP_DECR_REF(inp_tmp);
2939                                 /* unlock info */
2940                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2941                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2942                                         /*
2943                                          * Ok, must be one-2-one and
2944                                          * allowing port re-use
2945                                          */
2946                                         port_reuse_active = 1;
2947                                         goto continue_anyway;
2948                                 }
2949                                 SCTP_INP_DECR_REF(inp);
2950                                 SCTP_INP_INFO_WUNLOCK();
2951                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2952                                 return (EADDRINUSE);
2953                         }
2954                 } else {
2955                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2956                         if (inp_tmp != NULL) {
2957                                 /*
2958                                  * lock guy returned and lower count note
2959                                  * that we are not bound so inp_tmp should
2960                                  * NEVER be inp. And it is this inp
2961                                  * (inp_tmp) that gets the reference bump,
2962                                  * so we must lower it.
2963                                  */
2964                                 SCTP_INP_DECR_REF(inp_tmp);
2965                                 /* unlock info */
2966                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2967                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2968                                         /*
2969                                          * Ok, must be one-2-one and
2970                                          * allowing port re-use
2971                                          */
2972                                         port_reuse_active = 1;
2973                                         goto continue_anyway;
2974                                 }
2975                                 SCTP_INP_DECR_REF(inp);
2976                                 SCTP_INP_INFO_WUNLOCK();
2977                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2978                                 return (EADDRINUSE);
2979                         }
2980                 }
2981 continue_anyway:
2982                 SCTP_INP_WLOCK(inp);
2983                 if (bindall) {
2984                         /* verify that no lport is not used by a singleton */
2985                         if ((port_reuse_active == 0) &&
2986                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
2987                                 /* Sorry someone already has this one bound */
2988                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2989                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2990                                         port_reuse_active = 1;
2991                                 } else {
2992                                         SCTP_INP_DECR_REF(inp);
2993                                         SCTP_INP_WUNLOCK(inp);
2994                                         SCTP_INP_INFO_WUNLOCK();
2995                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2996                                         return (EADDRINUSE);
2997                                 }
2998                         }
2999                 }
3000         } else {
3001                 uint16_t first, last, candidate;
3002                 uint16_t count;
3003                 int done;
3004
3005                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3006                         first = MODULE_GLOBAL(ipport_hifirstauto);
3007                         last = MODULE_GLOBAL(ipport_hilastauto);
3008                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3009                         if (p && (error =
3010                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3011                             )) {
3012                                 SCTP_INP_DECR_REF(inp);
3013                                 SCTP_INP_WUNLOCK(inp);
3014                                 SCTP_INP_INFO_WUNLOCK();
3015                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3016                                 return (error);
3017                         }
3018                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3019                         last = MODULE_GLOBAL(ipport_lowlastauto);
3020                 } else {
3021                         first = MODULE_GLOBAL(ipport_firstauto);
3022                         last = MODULE_GLOBAL(ipport_lastauto);
3023                 }
3024                 if (first > last) {
3025                         uint16_t temp;
3026
3027                         temp = first;
3028                         first = last;
3029                         last = temp;
3030                 }
3031                 count = last - first + 1;       /* number of candidates */
3032                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3033
3034                 done = 0;
3035                 while (!done) {
3036                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3037                                 done = 1;
3038                         }
3039                         if (!done) {
3040                                 if (--count == 0) {
3041                                         SCTP_INP_DECR_REF(inp);
3042                                         SCTP_INP_WUNLOCK(inp);
3043                                         SCTP_INP_INFO_WUNLOCK();
3044                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3045                                         return (EADDRINUSE);
3046                                 }
3047                                 if (candidate == last)
3048                                         candidate = first;
3049                                 else
3050                                         candidate = candidate + 1;
3051                         }
3052                 }
3053                 lport = htons(candidate);
3054         }
3055         SCTP_INP_DECR_REF(inp);
3056         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3057             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3058                 /*
3059                  * this really should not happen. The guy did a non-blocking
3060                  * bind and then did a close at the same time.
3061                  */
3062                 SCTP_INP_WUNLOCK(inp);
3063                 SCTP_INP_INFO_WUNLOCK();
3064                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3065                 return (EINVAL);
3066         }
3067         /* ok we look clear to give out this port, so lets setup the binding */
3068         if (bindall) {
3069                 /* binding to all addresses, so just set in the proper flags */
3070                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3071                 /* set the automatic addr changes from kernel flag */
3072                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3073                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3074                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3075                 } else {
3076                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3077                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3078                 }
3079                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3080                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3081                 } else {
3082                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3083                 }
3084                 /*
3085                  * set the automatic mobility_base from kernel flag (by
3086                  * micchie)
3087                  */
3088                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3089                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3090                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3091                 } else {
3092                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3093                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3094                 }
3095                 /*
3096                  * set the automatic mobility_fasthandoff from kernel flag
3097                  * (by micchie)
3098                  */
3099                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3100                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3101                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3102                 } else {
3103                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3104                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3105                 }
3106         } else {
3107                 /*
3108                  * bind specific, make sure flags is off and add a new
3109                  * address structure to the sctp_addr_list inside the ep
3110                  * structure.
3111                  *
3112                  * We will need to allocate one and insert it at the head. The
3113                  * socketopt call can just insert new addresses in there as
3114                  * well. It will also have to do the embed scope kame hack
3115                  * too (before adding).
3116                  */
3117                 struct sctp_ifa *ifa;
3118                 struct sockaddr_storage store_sa;
3119
3120                 memset(&store_sa, 0, sizeof(store_sa));
3121                 switch (addr->sa_family) {
3122 #ifdef INET
3123                 case AF_INET:
3124                         {
3125                                 struct sockaddr_in *sin;
3126
3127                                 sin = (struct sockaddr_in *)&store_sa;
3128                                 memcpy(sin, addr, sizeof(struct sockaddr_in));
3129                                 sin->sin_port = 0;
3130                                 break;
3131                         }
3132 #endif
3133 #ifdef INET6
3134                 case AF_INET6:
3135                         {
3136                                 struct sockaddr_in6 *sin6;
3137
3138                                 sin6 = (struct sockaddr_in6 *)&store_sa;
3139                                 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3140                                 sin6->sin6_port = 0;
3141                                 break;
3142                         }
3143 #endif
3144                 default:
3145                         break;
3146                 }
3147                 /*
3148                  * first find the interface with the bound address need to
3149                  * zero out the port to find the address! yuck! can't do
3150                  * this earlier since need port for sctp_pcb_findep()
3151                  */
3152                 if (sctp_ifap != NULL) {
3153                         ifa = sctp_ifap;
3154                 } else {
3155                         /*
3156                          * Note for BSD we hit here always other O/S's will
3157                          * pass things in via the sctp_ifap argument
3158                          * (Panda).
3159                          */
3160                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3161                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3162                 }
3163                 if (ifa == NULL) {
3164                         /* Can't find an interface with that address */
3165                         SCTP_INP_WUNLOCK(inp);
3166                         SCTP_INP_INFO_WUNLOCK();
3167                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3168                         return (EADDRNOTAVAIL);
3169                 }
3170 #ifdef INET6
3171                 if (addr->sa_family == AF_INET6) {
3172                         /* GAK, more FIXME IFA lock? */
3173                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3174                                 /* Can't bind a non-existent addr. */
3175                                 SCTP_INP_WUNLOCK(inp);
3176                                 SCTP_INP_INFO_WUNLOCK();
3177                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3178                                 return (EINVAL);
3179                         }
3180                 }
3181 #endif
3182                 /* we're not bound all */
3183                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3184                 /* allow bindx() to send ASCONF's for binding changes */
3185                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3186                 /* clear automatic addr changes from kernel flag */
3187                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3188
3189                 /* add this address to the endpoint list */
3190                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3191                 if (error != 0) {
3192                         SCTP_INP_WUNLOCK(inp);
3193                         SCTP_INP_INFO_WUNLOCK();
3194                         return (error);
3195                 }
3196                 inp->laddr_count++;
3197         }
3198         /* find the bucket */
3199         if (port_reuse_active) {
3200                 /* Put it into tcp 1-2-1 hash */
3201                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3202                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3203         } else {
3204                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3205         }
3206         /* put it in the bucket */
3207         LIST_INSERT_HEAD(head, inp, sctp_hash);
3208         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3209             (void *)head, ntohs(lport), port_reuse_active);
3210         /* set in the port */
3211         inp->sctp_lport = lport;
3212
3213         /* turn off just the unbound flag */
3214         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3215         SCTP_INP_WUNLOCK(inp);
3216         SCTP_INP_INFO_WUNLOCK();
3217         return (0);
3218 }
3219
3220
3221 static void
3222 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3223 {
3224         struct sctp_iterator *it, *nit;
3225
3226         /*
3227          * We enter with the only the ITERATOR_LOCK in place and a write
3228          * lock on the inp_info stuff.
3229          */
3230         it = sctp_it_ctl.cur_it;
3231         if (it && (it->vn != curvnet)) {
3232                 /* Its not looking at our VNET */
3233                 return;
3234         }
3235         if (it && (it->inp == inp)) {
3236                 /*
3237                  * This is tricky and we hold the iterator lock, but when it
3238                  * returns and gets the lock (when we release it) the
3239                  * iterator will try to operate on inp. We need to stop that
3240                  * from happening. But of course the iterator has a
3241                  * reference on the stcb and inp. We can mark it and it will
3242                  * stop.
3243                  *
3244                  * If its a single iterator situation, we set the end iterator
3245                  * flag. Otherwise we set the iterator to go to the next
3246                  * inp.
3247                  *
3248                  */
3249                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3250                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3251                 } else {
3252                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3253                 }
3254         }
3255         /*
3256          * Now go through and remove any single reference to our inp that
3257          * may be still pending on the list
3258          */
3259         SCTP_IPI_ITERATOR_WQ_LOCK();
3260         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3261                 if (it->vn != curvnet) {
3262                         continue;
3263                 }
3264                 if (it->inp == inp) {
3265                         /* This one points to me is it inp specific? */
3266                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3267                                 /* Remove and free this one */
3268                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3269                                     it, sctp_nxt_itr);
3270                                 if (it->function_atend != NULL) {
3271                                         (*it->function_atend) (it->pointer, it->val);
3272                                 }
3273                                 SCTP_FREE(it, SCTP_M_ITER);
3274                         } else {
3275                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3276                                 if (it->inp) {
3277                                         SCTP_INP_INCR_REF(it->inp);
3278                                 }
3279                         }
3280                         /*
3281                          * When its put in the refcnt is incremented so decr
3282                          * it
3283                          */
3284                         SCTP_INP_DECR_REF(inp);
3285                 }
3286         }
3287         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3288 }
3289
3290 /* release sctp_inpcb unbind the port */
3291 void
3292 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3293 {
3294         /*
3295          * Here we free a endpoint. We must find it (if it is in the Hash
3296          * table) and remove it from there. Then we must also find it in the
3297          * overall list and remove it from there. After all removals are
3298          * complete then any timer has to be stopped. Then start the actual
3299          * freeing. a) Any local lists. b) Any associations. c) The hash of
3300          * all associations. d) finally the ep itself.
3301          */
3302         struct sctp_tcb *asoc, *nasoc;
3303         struct sctp_laddr *laddr, *nladdr;
3304         struct inpcb *ip_pcb;
3305         struct socket *so;
3306         int being_refed = 0;
3307         struct sctp_queued_to_read *sq, *nsq;
3308         int cnt;
3309         sctp_sharedkey_t *shared_key, *nshared_key;
3310
3311
3312 #ifdef SCTP_LOG_CLOSING
3313         sctp_log_closing(inp, NULL, 0);
3314 #endif
3315         SCTP_ITERATOR_LOCK();
3316         /* mark any iterators on the list or being processed */
3317         sctp_iterator_inp_being_freed(inp);
3318         SCTP_ITERATOR_UNLOCK();
3319         so = inp->sctp_socket;
3320         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3321                 /* been here before.. eeks.. get out of here */
3322                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3323 #ifdef SCTP_LOG_CLOSING
3324                 sctp_log_closing(inp, NULL, 1);
3325 #endif
3326                 return;
3327         }
3328         SCTP_ASOC_CREATE_LOCK(inp);
3329         SCTP_INP_INFO_WLOCK();
3330
3331         SCTP_INP_WLOCK(inp);
3332         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3333                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3334                 /* socket is gone, so no more wakeups allowed */
3335                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3336                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3337                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3338
3339         }
3340         /* First time through we have the socket lock, after that no more. */
3341         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3342             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3343
3344         if (inp->control) {
3345                 sctp_m_freem(inp->control);
3346                 inp->control = NULL;
3347         }
3348         if (inp->pkt) {
3349                 sctp_m_freem(inp->pkt);
3350                 inp->pkt = NULL;
3351         }
3352         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3353                                          * here but I will be nice :> (i.e.
3354                                          * ip_pcb = ep;) */
3355         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3356                 int cnt_in_sd;
3357
3358                 cnt_in_sd = 0;
3359                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3360                         SCTP_TCB_LOCK(asoc);
3361                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3362                                 /* Skip guys being freed */
3363                                 cnt_in_sd++;
3364                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3365                                         /*
3366                                          * Special case - we did not start a
3367                                          * kill timer on the asoc due to it
3368                                          * was not closed. So go ahead and
3369                                          * start it now.
3370                                          */
3371                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3372                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3373                                 }
3374                                 SCTP_TCB_UNLOCK(asoc);
3375                                 continue;
3376                         }
3377                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3378                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3379                             (asoc->asoc.total_output_queue_size == 0)) {
3380                                 /*
3381                                  * If we have data in queue, we don't want
3382                                  * to just free since the app may have done,
3383                                  * send()/close or connect/send/close. And
3384                                  * it wants the data to get across first.
3385                                  */
3386                                 /* Just abandon things in the front states */
3387                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3388                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3389                                         cnt_in_sd++;
3390                                 }
3391                                 continue;
3392                         }
3393                         /* Disconnect the socket please */
3394                         asoc->sctp_socket = NULL;
3395                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3396                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3397                             (asoc->asoc.control_pdapi) ||
3398                             (asoc->asoc.size_on_all_streams > 0) ||
3399                             (so && (so->so_rcv.sb_cc > 0))) {
3400                                 /* Left with Data unread */
3401                                 struct mbuf *op_err;
3402
3403                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3404                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3405                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3406                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3407                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3408                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3409                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3410                                 }
3411                                 if (sctp_free_assoc(inp, asoc,
3412                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3413                                         cnt_in_sd++;
3414                                 }
3415                                 continue;
3416                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3417                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3418                             (asoc->asoc.stream_queue_cnt == 0)) {
3419                                 if (asoc->asoc.locked_on_sending) {
3420                                         goto abort_anyway;
3421                                 }
3422                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3423                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3424                                         struct sctp_nets *netp;
3425
3426                                         /*
3427                                          * there is nothing queued to send,
3428                                          * so I send shutdown
3429                                          */
3430                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3431                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3432                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3433                                         }
3434                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3435                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3436                                         sctp_stop_timers_for_shutdown(asoc);
3437                                         if (asoc->asoc.alternate) {
3438                                                 netp = asoc->asoc.alternate;
3439                                         } else {
3440                                                 netp = asoc->asoc.primary_destination;
3441                                         }
3442                                         sctp_send_shutdown(asoc, netp);
3443                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3444                                             netp);
3445                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3446                                             asoc->asoc.primary_destination);
3447                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3448                                 }
3449                         } else {
3450                                 /* mark into shutdown pending */
3451                                 struct sctp_stream_queue_pending *sp;
3452
3453                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3454                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3455                                     asoc->asoc.primary_destination);
3456                                 if (asoc->asoc.locked_on_sending) {
3457                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3458                                             sctp_streamhead);
3459                                         if (sp == NULL) {
3460                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3461                                                     (void *)asoc->asoc.locked_on_sending,
3462                                                     asoc->asoc.locked_on_sending->stream_no);
3463                                         } else {
3464                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3465                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3466                                         }
3467                                 }
3468                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3469                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3470                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3471                                         struct mbuf *op_err;
3472
3473                         abort_anyway:
3474                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3475                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3476                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3477                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3478                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3479                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3480                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3481                                         }
3482                                         if (sctp_free_assoc(inp, asoc,
3483                                             SCTP_PCBFREE_NOFORCE,
3484                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3485                                                 cnt_in_sd++;
3486                                         }
3487                                         continue;
3488                                 } else {
3489                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3490                                 }
3491                         }
3492                         cnt_in_sd++;
3493                         SCTP_TCB_UNLOCK(asoc);
3494                 }
3495                 /* now is there some left in our SHUTDOWN state? */
3496                 if (cnt_in_sd) {
3497 #ifdef SCTP_LOG_CLOSING
3498                         sctp_log_closing(inp, NULL, 2);
3499 #endif
3500                         inp->sctp_socket = NULL;
3501                         SCTP_INP_WUNLOCK(inp);
3502                         SCTP_ASOC_CREATE_UNLOCK(inp);
3503                         SCTP_INP_INFO_WUNLOCK();
3504                         return;
3505                 }
3506         }
3507         inp->sctp_socket = NULL;
3508         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3509             SCTP_PCB_FLAGS_UNBOUND) {
3510                 /*
3511                  * ok, this guy has been bound. It's port is somewhere in
3512                  * the SCTP_BASE_INFO(hash table). Remove it!
3513                  */
3514                 LIST_REMOVE(inp, sctp_hash);
3515                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3516         }
3517         /*
3518          * If there is a timer running to kill us, forget it, since it may
3519          * have a contest on the INP lock.. which would cause us to die ...
3520          */
3521         cnt = 0;
3522         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3523                 SCTP_TCB_LOCK(asoc);
3524                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3525                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3526                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3527                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3528                         }
3529                         cnt++;
3530                         SCTP_TCB_UNLOCK(asoc);
3531                         continue;
3532                 }
3533                 /* Free associations that are NOT killing us */
3534                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3535                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3536                         struct mbuf *op_err;
3537
3538                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3539                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3540                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3541                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3542                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3543                         cnt++;
3544                         SCTP_TCB_UNLOCK(asoc);
3545                         continue;
3546                 }
3547                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3548                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3549                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3550                 }
3551                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3552                         cnt++;
3553                 }
3554         }
3555         if (cnt) {
3556                 /* Ok we have someone out there that will kill us */
3557                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3558 #ifdef SCTP_LOG_CLOSING
3559                 sctp_log_closing(inp, NULL, 3);
3560 #endif
3561                 SCTP_INP_WUNLOCK(inp);
3562                 SCTP_ASOC_CREATE_UNLOCK(inp);
3563                 SCTP_INP_INFO_WUNLOCK();
3564                 return;
3565         }
3566         if (SCTP_INP_LOCK_CONTENDED(inp))
3567                 being_refed++;
3568         if (SCTP_INP_READ_CONTENDED(inp))
3569                 being_refed++;
3570         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3571                 being_refed++;
3572
3573         if ((inp->refcount) ||
3574             (being_refed) ||
3575             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3576                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3577 #ifdef SCTP_LOG_CLOSING
3578                 sctp_log_closing(inp, NULL, 4);
3579 #endif
3580                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3581                 SCTP_INP_WUNLOCK(inp);
3582                 SCTP_ASOC_CREATE_UNLOCK(inp);
3583                 SCTP_INP_INFO_WUNLOCK();
3584                 return;
3585         }
3586         inp->sctp_ep.signature_change.type = 0;
3587         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3588         /*
3589          * Remove it from the list .. last thing we need a lock for.
3590          */
3591         LIST_REMOVE(inp, sctp_list);
3592         SCTP_INP_WUNLOCK(inp);
3593         SCTP_ASOC_CREATE_UNLOCK(inp);
3594         SCTP_INP_INFO_WUNLOCK();
3595         /*
3596          * Now we release all locks. Since this INP cannot be found anymore
3597          * except possibly by the kill timer that might be running. We call
3598          * the drain function here. It should hit the case were it sees the
3599          * ACTIVE flag cleared and exit out freeing us to proceed and
3600          * destroy everything.
3601          */
3602         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3603                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3604         } else {
3605                 /* Probably un-needed */
3606                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3607         }
3608
3609 #ifdef SCTP_LOG_CLOSING
3610         sctp_log_closing(inp, NULL, 5);
3611 #endif
3612
3613
3614         if ((inp->sctp_asocidhash) != NULL) {
3615                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3616                 inp->sctp_asocidhash = NULL;
3617         }
3618         /* sa_ignore FREED_MEMORY */
3619         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3620                 /* Its only abandoned if it had data left */
3621                 if (sq->length)
3622                         SCTP_STAT_INCR(sctps_left_abandon);
3623
3624                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3625                 sctp_free_remote_addr(sq->whoFrom);
3626                 if (so)
3627                         so->so_rcv.sb_cc -= sq->length;
3628                 if (sq->data) {
3629                         sctp_m_freem(sq->data);
3630                         sq->data = NULL;
3631                 }
3632                 /*
3633                  * no need to free the net count, since at this point all
3634                  * assoc's are gone.
3635                  */
3636                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3637                 SCTP_DECR_READQ_COUNT();
3638         }
3639         /* Now the sctp_pcb things */
3640         /*
3641          * free each asoc if it is not already closed/free. we can't use the
3642          * macro here since le_next will get freed as part of the
3643          * sctp_free_assoc() call.
3644          */
3645         if (so) {
3646 #ifdef IPSEC
3647                 ipsec_delete_pcbpolicy(ip_pcb);
3648 #endif                          /* IPSEC */
3649
3650                 /* Unlocks not needed since the socket is gone now */
3651         }
3652         if (ip_pcb->inp_options) {
3653                 (void)sctp_m_free(ip_pcb->inp_options);
3654                 ip_pcb->inp_options = 0;
3655         }
3656 #ifdef INET6
3657         if (ip_pcb->inp_vflag & INP_IPV6) {
3658                 struct in6pcb *in6p;
3659
3660                 in6p = (struct in6pcb *)inp;
3661                 ip6_freepcbopts(in6p->in6p_outputopts);
3662         }
3663 #endif                          /* INET6 */
3664         ip_pcb->inp_vflag = 0;
3665         /* free up authentication fields */
3666         if (inp->sctp_ep.local_auth_chunks != NULL)
3667                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3668         if (inp->sctp_ep.local_hmacs != NULL)
3669                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3670
3671         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3672                 LIST_REMOVE(shared_key, next);
3673                 sctp_free_sharedkey(shared_key);
3674                 /* sa_ignore FREED_MEMORY */
3675         }
3676
3677         /*
3678          * if we have an address list the following will free the list of
3679          * ifaddr's that are set into this ep. Again macro limitations here,
3680          * since the LIST_FOREACH could be a bad idea.
3681          */
3682         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3683                 sctp_remove_laddr(laddr);
3684         }
3685
3686 #ifdef SCTP_TRACK_FREED_ASOCS
3687         /* TEMP CODE */
3688         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3689                 LIST_REMOVE(asoc, sctp_tcblist);
3690                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3691                 SCTP_DECR_ASOC_COUNT();
3692         }
3693         /* *** END TEMP CODE *** */
3694 #endif
3695         /* Now lets see about freeing the EP hash table. */
3696         if (inp->sctp_tcbhash != NULL) {
3697                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3698                 inp->sctp_tcbhash = NULL;
3699         }
3700         /* Now we must put the ep memory back into the zone pool */
3701         crfree(inp->ip_inp.inp.inp_cred);
3702         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3703         SCTP_INP_LOCK_DESTROY(inp);
3704         SCTP_INP_READ_DESTROY(inp);
3705         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3706         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3707         SCTP_DECR_EP_COUNT();
3708 }
3709
3710
3711 struct sctp_nets *
3712 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3713 {
3714         struct sctp_nets *net;
3715
3716         /* locate the address */
3717         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3718                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3719                         return (net);
3720         }
3721         return (NULL);
3722 }
3723
3724
3725 int
3726 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3727 {
3728         struct sctp_ifa *sctp_ifa;
3729
3730         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3731         if (sctp_ifa) {
3732                 return (1);
3733         } else {
3734                 return (0);
3735         }
3736 }
3737
3738 /*
3739  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3740  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3741  * stats of stuff.
3742  */
3743 int
3744 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3745     struct sctp_nets **netp, int set_scope, int from)
3746 {
3747         /*
3748          * The following is redundant to the same lines in the
3749          * sctp_aloc_assoc() but is needed since others call the add address
3750          * function
3751          */
3752         struct sctp_nets *net, *netfirst;
3753         int addr_inscope;
3754
3755         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3756             from);
3757         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3758
3759         netfirst = sctp_findnet(stcb, newaddr);
3760         if (netfirst) {
3761                 /*
3762                  * Lie and return ok, we don't want to make the association
3763                  * go away for this behavior. It will happen in the TCP
3764                  * model in a connected socket. It does not reach the hash
3765                  * table until after the association is built so it can't be
3766                  * found. Mark as reachable, since the initial creation will
3767                  * have been cleared and the NOT_IN_ASSOC flag will have
3768                  * been added... and we don't want to end up removing it
3769                  * back out.
3770                  */
3771                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3772                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3773                             SCTP_ADDR_UNCONFIRMED);
3774                 } else {
3775                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3776                 }
3777
3778                 return (0);
3779         }
3780         addr_inscope = 1;
3781         switch (newaddr->sa_family) {
3782 #ifdef INET
3783         case AF_INET:
3784                 {
3785                         struct sockaddr_in *sin;
3786
3787                         sin = (struct sockaddr_in *)newaddr;
3788                         if (sin->sin_addr.s_addr == 0) {
3789                                 /* Invalid address */
3790                                 return (-1);
3791                         }
3792                         /* zero out the bzero area */
3793                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3794
3795                         /* assure len is set */
3796                         sin->sin_len = sizeof(struct sockaddr_in);
3797                         if (set_scope) {
3798 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3799                                 stcb->asoc.scope.ipv4_local_scope = 1;
3800 #else
3801                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3802                                         stcb->asoc.scope.ipv4_local_scope = 1;
3803                                 }
3804 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3805                         } else {
3806                                 /* Validate the address is in scope */
3807                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3808                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3809                                         addr_inscope = 0;
3810                                 }
3811                         }
3812                         break;
3813                 }
3814 #endif
3815 #ifdef INET6
3816         case AF_INET6:
3817                 {
3818                         struct sockaddr_in6 *sin6;
3819
3820                         sin6 = (struct sockaddr_in6 *)newaddr;
3821                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3822                                 /* Invalid address */
3823                                 return (-1);
3824                         }
3825                         /* assure len is set */
3826                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3827                         if (set_scope) {
3828                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3829                                         stcb->asoc.scope.loopback_scope = 1;
3830                                         stcb->asoc.scope.local_scope = 0;
3831                                         stcb->asoc.scope.ipv4_local_scope = 1;
3832                                         stcb->asoc.scope.site_scope = 1;
3833                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3834                                         /*
3835                                          * If the new destination is a
3836                                          * LINK_LOCAL we must have common
3837                                          * site scope. Don't set the local
3838                                          * scope since we may not share all
3839                                          * links, only loopback can do this.
3840                                          * Links on the local network would
3841                                          * also be on our private network
3842                                          * for v4 too.
3843                                          */
3844                                         stcb->asoc.scope.ipv4_local_scope = 1;
3845                                         stcb->asoc.scope.site_scope = 1;
3846                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3847                                         /*
3848                                          * If the new destination is
3849                                          * SITE_LOCAL then we must have site
3850                                          * scope in common.
3851                                          */
3852                                         stcb->asoc.scope.site_scope = 1;
3853                                 }
3854                         } else {
3855                                 /* Validate the address is in scope */
3856                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3857                                     (stcb->asoc.scope.loopback_scope == 0)) {
3858                                         addr_inscope = 0;
3859                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3860                                     (stcb->asoc.scope.local_scope == 0)) {
3861                                         addr_inscope = 0;
3862                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3863                                     (stcb->asoc.scope.site_scope == 0)) {
3864                                         addr_inscope = 0;
3865                                 }
3866                         }
3867                         break;
3868                 }
3869 #endif
3870         default:
3871                 /* not supported family type */
3872                 return (-1);
3873         }
3874         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3875         if (net == NULL) {
3876                 return (-1);
3877         }
3878         SCTP_INCR_RADDR_COUNT();
3879         bzero(net, sizeof(struct sctp_nets));
3880         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3881         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3882         switch (newaddr->sa_family) {
3883 #ifdef INET
3884         case AF_INET:
3885                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3886                 break;
3887 #endif
3888 #ifdef INET6
3889         case AF_INET6:
3890                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3891                 break;
3892 #endif
3893         default:
3894                 break;
3895         }
3896         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3897         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3898                 stcb->asoc.scope.loopback_scope = 1;
3899                 stcb->asoc.scope.ipv4_local_scope = 1;
3900                 stcb->asoc.scope.local_scope = 0;
3901                 stcb->asoc.scope.site_scope = 1;
3902                 addr_inscope = 1;
3903         }
3904         net->failure_threshold = stcb->asoc.def_net_failure;
3905         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3906         if (addr_inscope == 0) {
3907                 net->dest_state = (SCTP_ADDR_REACHABLE |
3908                     SCTP_ADDR_OUT_OF_SCOPE);
3909         } else {
3910                 if (from == SCTP_ADDR_IS_CONFIRMED)
3911                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3912                         net->dest_state = SCTP_ADDR_REACHABLE;
3913                 else
3914                         net->dest_state = SCTP_ADDR_REACHABLE |
3915                             SCTP_ADDR_UNCONFIRMED;
3916         }
3917         /*
3918          * We set this to 0, the timer code knows that this means its an
3919          * initial value
3920          */
3921         net->rto_needed = 1;
3922         net->RTO = 0;
3923         net->RTO_measured = 0;
3924         stcb->asoc.numnets++;
3925         net->ref_count = 1;
3926         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3927         net->port = stcb->asoc.port;
3928         net->dscp = stcb->asoc.default_dscp;
3929 #ifdef INET6
3930         net->flowlabel = stcb->asoc.default_flowlabel;
3931 #endif
3932         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3933                 net->dest_state |= SCTP_ADDR_NOHB;
3934         } else {
3935                 net->dest_state &= ~SCTP_ADDR_NOHB;
3936         }
3937         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3938                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3939         } else {
3940                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3941         }
3942         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3943         /* Init the timer structure */
3944         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3945         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3946         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3947
3948         /* Now generate a route for this guy */
3949 #ifdef INET6
3950         /* KAME hack: embed scopeid */
3951         if (newaddr->sa_family == AF_INET6) {
3952                 struct sockaddr_in6 *sin6;
3953
3954                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3955                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3956                 sin6->sin6_scope_id = 0;
3957         }
3958 #endif
3959         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3960
3961         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3962                 /* Get source address */
3963                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3964                     stcb,
3965                     (sctp_route_t *) & net->ro,
3966                     net,
3967                     0,
3968                     stcb->asoc.vrf_id);
3969                 /* Now get the interface MTU */
3970                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3971                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3972                 }
3973                 if (net->mtu > 0) {
3974                         uint32_t rmtu;
3975
3976                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3977                         if (rmtu == 0) {
3978                                 /*
3979                                  * Start things off to match mtu of
3980                                  * interface please.
3981                                  */
3982                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3983                                     net->ro.ro_rt, net->mtu);
3984                         } else {
3985                                 /*
3986                                  * we take the route mtu over the interface,
3987                                  * since the route may be leading out the
3988                                  * loopback, or a different interface.
3989                                  */
3990                                 net->mtu = rmtu;
3991                         }
3992                 }
3993         }
3994         if (net->mtu == 0) {
3995                 switch (newaddr->sa_family) {
3996 #ifdef INET
3997                 case AF_INET:
3998                         net->mtu = SCTP_DEFAULT_MTU;
3999                         break;
4000 #endif
4001 #ifdef INET6
4002                 case AF_INET6:
4003                         net->mtu = 1280;
4004                         break;
4005 #endif
4006                 default:
4007                         break;
4008                 }
4009         }
4010         if (net->port) {
4011                 net->mtu -= (uint32_t) sizeof(struct udphdr);
4012         }
4013         if (from == SCTP_ALLOC_ASOC) {
4014                 stcb->asoc.smallest_mtu = net->mtu;
4015         }
4016         if (stcb->asoc.smallest_mtu > net->mtu) {
4017                 stcb->asoc.smallest_mtu = net->mtu;
4018         }
4019 #ifdef INET6
4020         if (newaddr->sa_family == AF_INET6) {
4021                 struct sockaddr_in6 *sin6;
4022
4023                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4024                 (void)sa6_recoverscope(sin6);
4025         }
4026 #endif
4027
4028         /* JRS - Use the congestion control given in the CC module */
4029         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4030                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4031
4032         /*
4033          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4034          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4035          */
4036         net->find_pseudo_cumack = 1;
4037         net->find_rtx_pseudo_cumack = 1;
4038         net->src_addr_selected = 0;
4039         /* Choose an initial flowid. */
4040         net->flowid = stcb->asoc.my_vtag ^
4041             ntohs(stcb->rport) ^
4042             ntohs(stcb->sctp_ep->sctp_lport);
4043 #ifdef INVARIANTS
4044         net->flowidset = 1;
4045 #endif
4046         if (netp) {
4047                 *netp = net;
4048         }
4049         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4050         if (net->ro.ro_rt == NULL) {
4051                 /* Since we have no route put it at the back */
4052                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4053         } else if (netfirst == NULL) {
4054                 /* We are the first one in the pool. */
4055                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4056         } else if (netfirst->ro.ro_rt == NULL) {
4057                 /*
4058                  * First one has NO route. Place this one ahead of the first
4059                  * one.
4060                  */
4061                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4062         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4063                 /*
4064                  * This one has a different interface than the one at the
4065                  * top of the list. Place it ahead.
4066                  */
4067                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4068         } else {
4069                 /*
4070                  * Ok we have the same interface as the first one. Move
4071                  * forward until we find either a) one with a NULL route...
4072                  * insert ahead of that b) one with a different ifp.. insert
4073                  * after that. c) end of the list.. insert at the tail.
4074                  */
4075                 struct sctp_nets *netlook;
4076
4077                 do {
4078                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4079                         if (netlook == NULL) {
4080                                 /* End of the list */
4081                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4082                                 break;
4083                         } else if (netlook->ro.ro_rt == NULL) {
4084                                 /* next one has NO route */
4085                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4086                                 break;
4087                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4088                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4089                                     net, sctp_next);
4090                                 break;
4091                         }
4092                         /* Shift forward */
4093                         netfirst = netlook;
4094                 } while (netlook != NULL);
4095         }
4096
4097         /* got to have a primary set */
4098         if (stcb->asoc.primary_destination == 0) {
4099                 stcb->asoc.primary_destination = net;
4100         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4101                     (net->ro.ro_rt) &&
4102             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4103                 /* No route to current primary adopt new primary */
4104                 stcb->asoc.primary_destination = net;
4105         }
4106         /* Validate primary is first */
4107         net = TAILQ_FIRST(&stcb->asoc.nets);
4108         if ((net != stcb->asoc.primary_destination) &&
4109             (stcb->asoc.primary_destination)) {
4110                 /*
4111                  * first one on the list is NOT the primary sctp_cmpaddr()
4112                  * is much more efficient if the primary is the first on the
4113                  * list, make it so.
4114                  */
4115                 TAILQ_REMOVE(&stcb->asoc.nets,
4116                     stcb->asoc.primary_destination, sctp_next);
4117                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4118                     stcb->asoc.primary_destination, sctp_next);
4119         }
4120         return (0);
4121 }
4122
4123
4124 static uint32_t
4125 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4126 {
4127         uint32_t id;
4128         struct sctpasochead *head;
4129         struct sctp_tcb *lstcb;
4130
4131         SCTP_INP_WLOCK(inp);
4132 try_again:
4133         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4134                 /* TSNH */
4135                 SCTP_INP_WUNLOCK(inp);
4136                 return (0);
4137         }
4138         /*
4139          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4140          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4141          */
4142         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4143                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4144         }
4145         id = inp->sctp_associd_counter;
4146         inp->sctp_associd_counter++;
4147         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4148         if (lstcb) {
4149                 goto try_again;
4150         }
4151         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4152         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4153         stcb->asoc.in_asocid_hash = 1;
4154         SCTP_INP_WUNLOCK(inp);
4155         return id;
4156 }
4157
4158 /*
4159  * allocate an association and add it to the endpoint. The caller must be
4160  * careful to add all additional addresses once they are know right away or
4161  * else the assoc will be may experience a blackout scenario.
4162  */
4163 struct sctp_tcb *
4164 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4165     int *error, uint32_t override_tag, uint32_t vrf_id,
4166     struct thread *p
4167 )
4168 {
4169         /* note the p argument is only valid in unbound sockets */
4170
4171         struct sctp_tcb *stcb;
4172         struct sctp_association *asoc;
4173         struct sctpasochead *head;
4174         uint16_t rport;
4175         int err;
4176
4177         /*
4178          * Assumption made here: Caller has done a
4179          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4180          * address does not exist already.
4181          */
4182         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4183                 /* Hit max assoc, sorry no more */
4184                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4185                 *error = ENOBUFS;
4186                 return (NULL);
4187         }
4188         if (firstaddr == NULL) {
4189                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4190                 *error = EINVAL;
4191                 return (NULL);
4192         }
4193         SCTP_INP_RLOCK(inp);
4194         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4195             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4196             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4197                 /*
4198                  * If its in the TCP pool, its NOT allowed to create an
4199                  * association. The parent listener needs to call
4200                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4201                  * off, or connected one does this.. its an error.
4202                  */
4203                 SCTP_INP_RUNLOCK(inp);
4204                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4205                 *error = EINVAL;
4206                 return (NULL);
4207         }
4208         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4209             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4210                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4211                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4212                         SCTP_INP_RUNLOCK(inp);
4213                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4214                         *error = EINVAL;
4215                         return (NULL);
4216                 }
4217         }
4218         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4219 #ifdef SCTP_DEBUG
4220         if (firstaddr) {
4221                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4222                 switch (firstaddr->sa_family) {
4223 #ifdef INET
4224                 case AF_INET:
4225                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4226                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4227                         break;
4228 #endif
4229 #ifdef INET6
4230                 case AF_INET6:
4231                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4232                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4233                         break;
4234 #endif
4235                 default:
4236                         break;
4237                 }
4238         } else {
4239                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4240         }
4241 #endif                          /* SCTP_DEBUG */
4242         switch (firstaddr->sa_family) {
4243 #ifdef INET
4244         case AF_INET:
4245                 {
4246                         struct sockaddr_in *sin;
4247
4248                         sin = (struct sockaddr_in *)firstaddr;
4249                         if ((ntohs(sin->sin_port) == 0) ||
4250                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4251                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4252                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4253                                 /* Invalid address */
4254                                 SCTP_INP_RUNLOCK(inp);
4255                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4256                                 *error = EINVAL;
4257                                 return (NULL);
4258                         }
4259                         rport = sin->sin_port;
4260                         break;
4261                 }
4262 #endif
4263 #ifdef INET6
4264         case AF_INET6:
4265                 {
4266                         struct sockaddr_in6 *sin6;
4267
4268                         sin6 = (struct sockaddr_in6 *)firstaddr;
4269                         if ((ntohs(sin6->sin6_port) == 0) ||
4270                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4271                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4272                                 /* Invalid address */
4273                                 SCTP_INP_RUNLOCK(inp);
4274                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4275                                 *error = EINVAL;
4276                                 return (NULL);
4277                         }
4278                         rport = sin6->sin6_port;
4279                         break;
4280                 }
4281 #endif
4282         default:
4283                 /* not supported family type */
4284                 SCTP_INP_RUNLOCK(inp);
4285                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4286                 *error = EINVAL;
4287                 return (NULL);
4288         }
4289         SCTP_INP_RUNLOCK(inp);
4290         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4291                 /*
4292                  * If you have not performed a bind, then we need to do the
4293                  * ephemeral bind for you.
4294                  */
4295                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4296                     (struct sockaddr *)NULL,
4297                     (struct sctp_ifa *)NULL,
4298                     p
4299                     ))) {
4300                         /* bind error, probably perm */
4301                         *error = err;
4302                         return (NULL);
4303                 }
4304         }
4305         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4306         if (stcb == NULL) {
4307                 /* out of memory? */
4308                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4309                 *error = ENOMEM;
4310                 return (NULL);
4311         }
4312         SCTP_INCR_ASOC_COUNT();
4313
4314         bzero(stcb, sizeof(*stcb));
4315         asoc = &stcb->asoc;
4316
4317         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4318         SCTP_TCB_LOCK_INIT(stcb);
4319         SCTP_TCB_SEND_LOCK_INIT(stcb);
4320         stcb->rport = rport;
4321         /* setup back pointer's */
4322         stcb->sctp_ep = inp;
4323         stcb->sctp_socket = inp->sctp_socket;
4324         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4325                 /* failed */
4326                 SCTP_TCB_LOCK_DESTROY(stcb);
4327                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4328                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4329                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4330                 SCTP_DECR_ASOC_COUNT();
4331                 *error = err;
4332                 return (NULL);
4333         }
4334         /* and the port */
4335         SCTP_INP_INFO_WLOCK();
4336         SCTP_INP_WLOCK(inp);
4337         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4338                 /* inpcb freed while alloc going on */
4339                 SCTP_TCB_LOCK_DESTROY(stcb);
4340                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4341                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4342                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4343                 SCTP_INP_WUNLOCK(inp);
4344                 SCTP_INP_INFO_WUNLOCK();
4345                 SCTP_DECR_ASOC_COUNT();
4346                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4347                 *error = EINVAL;
4348                 return (NULL);
4349         }
4350         SCTP_TCB_LOCK(stcb);
4351
4352         /* now that my_vtag is set, add it to the hash */
4353         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4354         /* put it in the bucket in the vtag hash of assoc's for the system */
4355         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4356         SCTP_INP_INFO_WUNLOCK();
4357
4358         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4359                 /* failure.. memory error? */
4360                 if (asoc->strmout) {
4361                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4362                         asoc->strmout = NULL;
4363                 }
4364                 if (asoc->mapping_array) {
4365                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4366                         asoc->mapping_array = NULL;
4367                 }
4368                 if (asoc->nr_mapping_array) {
4369                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4370                         asoc->nr_mapping_array = NULL;
4371                 }
4372                 SCTP_DECR_ASOC_COUNT();
4373                 SCTP_TCB_UNLOCK(stcb);
4374                 SCTP_TCB_LOCK_DESTROY(stcb);
4375                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4376                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4377                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4378                 SCTP_INP_WUNLOCK(inp);
4379                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4380                 *error = ENOBUFS;
4381                 return (NULL);
4382         }
4383         /* Init all the timers */
4384         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4385         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4386         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4387         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4388         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4389         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4390         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4391
4392         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4393         /* now file the port under the hash as well */
4394         if (inp->sctp_tcbhash != NULL) {
4395                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4396                     inp->sctp_hashmark)];
4397                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4398         }
4399         SCTP_INP_WUNLOCK(inp);
4400         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4401         return (stcb);
4402 }
4403
4404
4405 void
4406 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4407 {
4408         struct sctp_association *asoc;
4409
4410         asoc = &stcb->asoc;
4411         asoc->numnets--;
4412         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4413         if (net == asoc->primary_destination) {
4414                 /* Reset primary */
4415                 struct sctp_nets *lnet;
4416
4417                 lnet = TAILQ_FIRST(&asoc->nets);
4418                 /*
4419                  * Mobility adaptation Ideally, if deleted destination is
4420                  * the primary, it becomes a fast retransmission trigger by
4421                  * the subsequent SET PRIMARY. (by micchie)
4422                  */
4423                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4424                     SCTP_MOBILITY_BASE) ||
4425                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4426                     SCTP_MOBILITY_FASTHANDOFF)) {
4427                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4428                         if (asoc->deleted_primary != NULL) {
4429                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4430                                 goto out;
4431                         }
4432                         asoc->deleted_primary = net;
4433                         atomic_add_int(&net->ref_count, 1);
4434                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4435                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4436                         sctp_mobility_feature_on(stcb->sctp_ep,
4437                             SCTP_MOBILITY_PRIM_DELETED);
4438                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4439                             stcb->sctp_ep, stcb, NULL);
4440                 }
4441 out:
4442                 /* Try to find a confirmed primary */
4443                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4444         }
4445         if (net == asoc->last_data_chunk_from) {
4446                 /* Reset primary */
4447                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4448         }
4449         if (net == asoc->last_control_chunk_from) {
4450                 /* Clear net */
4451                 asoc->last_control_chunk_from = NULL;
4452         }
4453         if (net == stcb->asoc.alternate) {
4454                 sctp_free_remote_addr(stcb->asoc.alternate);
4455                 stcb->asoc.alternate = NULL;
4456         }
4457         sctp_free_remote_addr(net);
4458 }
4459
4460 /*
4461  * remove a remote endpoint address from an association, it will fail if the
4462  * address does not exist.
4463  */
4464 int
4465 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4466 {
4467         /*
4468          * Here we need to remove a remote address. This is quite simple, we
4469          * first find it in the list of address for the association
4470          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4471          * on that item. Note we do not allow it to be removed if there are
4472          * no other addresses.
4473          */
4474         struct sctp_association *asoc;
4475         struct sctp_nets *net, *nnet;
4476
4477         asoc = &stcb->asoc;
4478
4479         /* locate the address */
4480         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4481                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4482                         continue;
4483                 }
4484                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4485                     remaddr)) {
4486                         /* we found the guy */
4487                         if (asoc->numnets < 2) {
4488                                 /* Must have at LEAST two remote addresses */
4489                                 return (-1);
4490                         } else {
4491                                 sctp_remove_net(stcb, net);
4492                                 return (0);
4493                         }
4494                 }
4495         }
4496         /* not found. */
4497         return (-2);
4498 }
4499
4500 void
4501 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4502 {
4503         struct sctpvtaghead *chain;
4504         struct sctp_tagblock *twait_block;
4505         int found = 0;
4506         int i;
4507
4508         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4509         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4510                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4511                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4512                             (twait_block->vtag_block[i].lport == lport) &&
4513                             (twait_block->vtag_block[i].rport == rport)) {
4514                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4515                                 twait_block->vtag_block[i].v_tag = 0;
4516                                 twait_block->vtag_block[i].lport = 0;
4517                                 twait_block->vtag_block[i].rport = 0;
4518                                 found = 1;
4519                                 break;
4520                         }
4521                 }
4522                 if (found)
4523                         break;
4524         }
4525 }
4526
4527 int
4528 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4529 {
4530         struct sctpvtaghead *chain;
4531         struct sctp_tagblock *twait_block;
4532         int found = 0;
4533         int i;
4534
4535         SCTP_INP_INFO_WLOCK();
4536         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4537         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4538                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4539                         if ((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                                 found = 1;
4543                                 break;
4544                         }
4545                 }
4546                 if (found)
4547                         break;
4548         }
4549         SCTP_INP_INFO_WUNLOCK();
4550         return (found);
4551 }
4552
4553
4554 void
4555 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4556 {
4557         struct sctpvtaghead *chain;
4558         struct sctp_tagblock *twait_block;
4559         struct timeval now;
4560         int set, i;
4561
4562         if (time == 0) {
4563                 /* Its disabled */
4564                 return;
4565         }
4566         (void)SCTP_GETTIME_TIMEVAL(&now);
4567         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4568         set = 0;
4569         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4570                 /* Block(s) present, lets find space, and expire on the fly */
4571                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4572                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4573                             !set) {
4574                                 twait_block->vtag_block[i].tv_sec_at_expire =
4575                                     now.tv_sec + time;
4576                                 twait_block->vtag_block[i].v_tag = tag;
4577                                 twait_block->vtag_block[i].lport = lport;
4578                                 twait_block->vtag_block[i].rport = rport;
4579                                 set = 1;
4580                         } else if ((twait_block->vtag_block[i].v_tag) &&
4581                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4582                                 /* Audit expires this guy */
4583                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4584                                 twait_block->vtag_block[i].v_tag = 0;
4585                                 twait_block->vtag_block[i].lport = 0;
4586                                 twait_block->vtag_block[i].rport = 0;
4587                                 if (set == 0) {
4588                                         /* Reuse it for my new tag */
4589                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4590                                         twait_block->vtag_block[i].v_tag = tag;
4591                                         twait_block->vtag_block[i].lport = lport;
4592                                         twait_block->vtag_block[i].rport = rport;
4593                                         set = 1;
4594                                 }
4595                         }
4596                 }
4597                 if (set) {
4598                         /*
4599                          * We only do up to the block where we can place our
4600                          * tag for audits
4601                          */
4602                         break;
4603                 }
4604         }
4605         /* Need to add a new block to chain */
4606         if (!set) {
4607                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4608                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4609                 if (twait_block == NULL) {
4610 #ifdef INVARIANTS
4611                         panic("Can not alloc tagblock");
4612 #endif
4613                         return;
4614                 }
4615                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4616                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4617                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4618                 twait_block->vtag_block[0].v_tag = tag;
4619                 twait_block->vtag_block[0].lport = lport;
4620                 twait_block->vtag_block[0].rport = rport;
4621         }
4622 }
4623
4624
4625
4626 /*-
4627  * Free the association after un-hashing the remote port. This
4628  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4629  * expect that the input to this function IS a locked TCB.
4630  * It will return 0, if it did NOT destroy the association (instead
4631  * it unlocks it. It will return NON-zero if it either destroyed the
4632  * association OR the association is already destroyed.
4633  */
4634 int
4635 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4636 {
4637         int i;
4638         struct sctp_association *asoc;
4639         struct sctp_nets *net, *nnet;
4640         struct sctp_laddr *laddr, *naddr;
4641         struct sctp_tmit_chunk *chk, *nchk;
4642         struct sctp_asconf_addr *aparam, *naparam;
4643         struct sctp_asconf_ack *aack, *naack;
4644         struct sctp_stream_reset_list *strrst, *nstrrst;
4645         struct sctp_queued_to_read *sq, *nsq;
4646         struct sctp_stream_queue_pending *sp, *nsp;
4647         sctp_sharedkey_t *shared_key, *nshared_key;
4648         struct socket *so;
4649
4650         /* first, lets purge the entry from the hash table. */
4651
4652 #ifdef SCTP_LOG_CLOSING
4653         sctp_log_closing(inp, stcb, 6);
4654 #endif
4655         if (stcb->asoc.state == 0) {
4656 #ifdef SCTP_LOG_CLOSING
4657                 sctp_log_closing(inp, NULL, 7);
4658 #endif
4659                 /* there is no asoc, really TSNH :-0 */
4660                 return (1);
4661         }
4662         if (stcb->asoc.alternate) {
4663                 sctp_free_remote_addr(stcb->asoc.alternate);
4664                 stcb->asoc.alternate = NULL;
4665         }
4666         /* TEMP CODE */
4667         if (stcb->freed_from_where == 0) {
4668                 /* Only record the first place free happened from */
4669                 stcb->freed_from_where = from_location;
4670         }
4671         /* TEMP CODE */
4672
4673         asoc = &stcb->asoc;
4674         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4675             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4676                 /* nothing around */
4677                 so = NULL;
4678         else
4679                 so = inp->sctp_socket;
4680
4681         /*
4682          * We used timer based freeing if a reader or writer is in the way.
4683          * So we first check if we are actually being called from a timer,
4684          * if so we abort early if a reader or writer is still in the way.
4685          */
4686         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4687             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4688                 /*
4689                  * is it the timer driving us? if so are the reader/writers
4690                  * gone?
4691                  */
4692                 if (stcb->asoc.refcnt) {
4693                         /* nope, reader or writer in the way */
4694                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4695                         /* no asoc destroyed */
4696                         SCTP_TCB_UNLOCK(stcb);
4697 #ifdef SCTP_LOG_CLOSING
4698                         sctp_log_closing(inp, stcb, 8);
4699 #endif
4700                         return (0);
4701                 }
4702         }
4703         /* now clean up any other timers */
4704         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4705         asoc->dack_timer.self = NULL;
4706         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4707         /*-
4708          * For stream reset we don't blast this unless
4709          * it is a str-reset timer, it might be the
4710          * free-asoc timer which we DON'T want to
4711          * disturb.
4712          */
4713         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4714                 asoc->strreset_timer.self = NULL;
4715         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4716         asoc->asconf_timer.self = NULL;
4717         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4718         asoc->autoclose_timer.self = NULL;
4719         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4720         asoc->shut_guard_timer.self = NULL;
4721         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4722         asoc->delayed_event_timer.self = NULL;
4723         /* Mobility adaptation */
4724         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4725         asoc->delete_prim_timer.self = NULL;
4726         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4727                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4728                 net->rxt_timer.self = NULL;
4729                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4730                 net->pmtu_timer.self = NULL;
4731                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4732                 net->hb_timer.self = NULL;
4733         }
4734         /* Now the read queue needs to be cleaned up (only once) */
4735         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4736                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4737                 SCTP_INP_READ_LOCK(inp);
4738                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4739                         if (sq->stcb == stcb) {
4740                                 sq->do_not_ref_stcb = 1;
4741                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4742                                 /*
4743                                  * If there is no end, there never will be
4744                                  * now.
4745                                  */
4746                                 if (sq->end_added == 0) {
4747                                         /* Held for PD-API clear that. */
4748                                         sq->pdapi_aborted = 1;
4749                                         sq->held_length = 0;
4750                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4751                                                 /*
4752                                                  * Need to add a PD-API
4753                                                  * aborted indication.
4754                                                  * Setting the control_pdapi
4755                                                  * assures that it will be
4756                                                  * added right after this
4757                                                  * msg.
4758                                                  */
4759                                                 uint32_t strseq;
4760
4761                                                 stcb->asoc.control_pdapi = sq;
4762                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4763                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4764                                                     stcb,
4765                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4766                                                     (void *)&strseq,
4767                                                     SCTP_SO_LOCKED);
4768                                                 stcb->asoc.control_pdapi = NULL;
4769                                         }
4770                                 }
4771                                 /* Add an end to wake them */
4772                                 sq->end_added = 1;
4773                         }
4774                 }
4775                 SCTP_INP_READ_UNLOCK(inp);
4776                 if (stcb->block_entry) {
4777                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4778                         stcb->block_entry->error = ECONNRESET;
4779                         stcb->block_entry = NULL;
4780                 }
4781         }
4782         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4783                 /*
4784                  * Someone holds a reference OR the socket is unaccepted
4785                  * yet.
4786                  */
4787                 if ((stcb->asoc.refcnt) ||
4788                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4789                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4790                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4791                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4792                 }
4793                 SCTP_TCB_UNLOCK(stcb);
4794                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4795                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4796                         /* nothing around */
4797                         so = NULL;
4798                 if (so) {
4799                         /* Wake any reader/writers */
4800                         sctp_sorwakeup(inp, so);
4801                         sctp_sowwakeup(inp, so);
4802                 }
4803 #ifdef SCTP_LOG_CLOSING
4804                 sctp_log_closing(inp, stcb, 9);
4805 #endif
4806                 /* no asoc destroyed */
4807                 return (0);
4808         }
4809 #ifdef SCTP_LOG_CLOSING
4810         sctp_log_closing(inp, stcb, 10);
4811 #endif
4812         /*
4813          * When I reach here, no others want to kill the assoc yet.. and I
4814          * own the lock. Now its possible an abort comes in when I do the
4815          * lock exchange below to grab all the locks to do the final take
4816          * out. to prevent this we increment the count, which will start a
4817          * timer and blow out above thus assuring us that we hold exclusive
4818          * killing of the asoc. Note that after getting back the TCB lock we
4819          * will go ahead and increment the counter back up and stop any
4820          * timer a passing stranger may have started :-S
4821          */
4822         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4823                 atomic_add_int(&stcb->asoc.refcnt, 1);
4824
4825                 SCTP_TCB_UNLOCK(stcb);
4826                 SCTP_INP_INFO_WLOCK();
4827                 SCTP_INP_WLOCK(inp);
4828                 SCTP_TCB_LOCK(stcb);
4829         }
4830         /* Double check the GONE flag */
4831         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4832             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4833                 /* nothing around */
4834                 so = NULL;
4835
4836         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4837             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4838                 /*
4839                  * For TCP type we need special handling when we are
4840                  * connected. We also include the peel'ed off ones to.
4841                  */
4842                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4843                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4844                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4845                         if (so) {
4846                                 SOCK_LOCK(so);
4847                                 if (so->so_rcv.sb_cc == 0) {
4848                                         so->so_state &= ~(SS_ISCONNECTING |
4849                                             SS_ISDISCONNECTING |
4850                                             SS_ISCONFIRMING |
4851                                             SS_ISCONNECTED);
4852                                 }
4853                                 socantrcvmore_locked(so);
4854                                 sctp_sowwakeup(inp, so);
4855                                 sctp_sorwakeup(inp, so);
4856                                 SCTP_SOWAKEUP(so);
4857                         }
4858                 }
4859         }
4860         /*
4861          * Make it invalid too, that way if its about to run it will abort
4862          * and return.
4863          */
4864         /* re-increment the lock */
4865         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4866                 atomic_add_int(&stcb->asoc.refcnt, -1);
4867         }
4868         if (stcb->asoc.refcnt) {
4869                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4870                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4871                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4872                         SCTP_INP_INFO_WUNLOCK();
4873                         SCTP_INP_WUNLOCK(inp);
4874                 }
4875                 SCTP_TCB_UNLOCK(stcb);
4876                 return (0);
4877         }
4878         asoc->state = 0;
4879         if (inp->sctp_tcbhash) {
4880                 LIST_REMOVE(stcb, sctp_tcbhash);
4881         }
4882         if (stcb->asoc.in_asocid_hash) {
4883                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4884         }
4885         /* Now lets remove it from the list of ALL associations in the EP */
4886         LIST_REMOVE(stcb, sctp_tcblist);
4887         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4888                 SCTP_INP_INCR_REF(inp);
4889                 SCTP_INP_WUNLOCK(inp);
4890         }
4891         /* pull from vtag hash */
4892         LIST_REMOVE(stcb, sctp_asocs);
4893         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4894             inp->sctp_lport, stcb->rport);
4895
4896         /*
4897          * Now restop the timers to be sure this is paranoia at is finest!
4898          */
4899         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4900         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4901         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4902         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4903         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4904         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4905         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4906         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4907                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4908                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4909                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4910         }
4911
4912         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4913         /*
4914          * The chunk lists and such SHOULD be empty but we check them just
4915          * in case.
4916          */
4917         /* anything on the wheel needs to be removed */
4918         for (i = 0; i < asoc->streamoutcnt; i++) {
4919                 struct sctp_stream_out *outs;
4920
4921                 outs = &asoc->strmout[i];
4922                 /* now clean up any chunks here */
4923                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4924                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4925                         sctp_free_spbufspace(stcb, asoc, sp);
4926                         if (sp->data) {
4927                                 if (so) {
4928                                         /* Still an open socket - report */
4929                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4930                                             0, (void *)sp, SCTP_SO_LOCKED);
4931                                 }
4932                                 if (sp->data) {
4933                                         sctp_m_freem(sp->data);
4934                                         sp->data = NULL;
4935                                         sp->tail_mbuf = NULL;
4936                                         sp->length = 0;
4937                                 }
4938                         }
4939                         if (sp->net) {
4940                                 sctp_free_remote_addr(sp->net);
4941                                 sp->net = NULL;
4942                         }
4943                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4944                 }
4945         }
4946         /* sa_ignore FREED_MEMORY */
4947         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4948                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4949                 SCTP_FREE(strrst, SCTP_M_STRESET);
4950         }
4951         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4952                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4953                 if (sq->data) {
4954                         sctp_m_freem(sq->data);
4955                         sq->data = NULL;
4956                 }
4957                 sctp_free_remote_addr(sq->whoFrom);
4958                 sq->whoFrom = NULL;
4959                 sq->stcb = NULL;
4960                 /* Free the ctl entry */
4961                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4962                 SCTP_DECR_READQ_COUNT();
4963                 /* sa_ignore FREED_MEMORY */
4964         }
4965         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4966                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4967                 if (chk->data) {
4968                         sctp_m_freem(chk->data);
4969                         chk->data = NULL;
4970                 }
4971                 if (chk->holds_key_ref)
4972                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4973                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4974                 SCTP_DECR_CHK_COUNT();
4975                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4976                 asoc->free_chunk_cnt--;
4977                 /* sa_ignore FREED_MEMORY */
4978         }
4979         /* pending send queue SHOULD be empty */
4980         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4981                 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
4982                         asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
4983 #ifdef INVARIANTS
4984                 } else {
4985                         panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
4986 #endif
4987                 }
4988                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4989                 if (chk->data) {
4990                         if (so) {
4991                                 /* Still a socket? */
4992                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
4993                                     0, chk, SCTP_SO_LOCKED);
4994                         }
4995                         if (chk->data) {
4996                                 sctp_m_freem(chk->data);
4997                                 chk->data = NULL;
4998                         }
4999                 }
5000                 if (chk->holds_key_ref)
5001                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5002                 if (chk->whoTo) {
5003                         sctp_free_remote_addr(chk->whoTo);
5004                         chk->whoTo = NULL;
5005                 }
5006                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5007                 SCTP_DECR_CHK_COUNT();
5008                 /* sa_ignore FREED_MEMORY */
5009         }
5010         /* sent queue SHOULD be empty */
5011         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5012                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5013                         if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
5014                                 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
5015 #ifdef INVARIANTS
5016                         } else {
5017                                 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
5018 #endif
5019                         }
5020                 }
5021                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5022                 if (chk->data) {
5023                         if (so) {
5024                                 /* Still a socket? */
5025                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5026                                     0, chk, SCTP_SO_LOCKED);
5027                         }
5028                         if (chk->data) {
5029                                 sctp_m_freem(chk->data);
5030                                 chk->data = NULL;
5031                         }
5032                 }
5033                 if (chk->holds_key_ref)
5034                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5035                 sctp_free_remote_addr(chk->whoTo);
5036                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5037                 SCTP_DECR_CHK_COUNT();
5038                 /* sa_ignore FREED_MEMORY */
5039         }
5040 #ifdef INVARIANTS
5041         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5042                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5043                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5044                 }
5045         }
5046 #endif
5047         /* control queue MAY not be empty */
5048         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5049                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5050                 if (chk->data) {
5051                         sctp_m_freem(chk->data);
5052                         chk->data = NULL;
5053                 }
5054                 if (chk->holds_key_ref)
5055                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5056                 sctp_free_remote_addr(chk->whoTo);
5057                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5058                 SCTP_DECR_CHK_COUNT();
5059                 /* sa_ignore FREED_MEMORY */
5060         }
5061         /* ASCONF queue MAY not be empty */
5062         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5063                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5064                 if (chk->data) {
5065                         sctp_m_freem(chk->data);
5066                         chk->data = NULL;
5067                 }
5068                 if (chk->holds_key_ref)
5069                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5070                 sctp_free_remote_addr(chk->whoTo);
5071                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5072                 SCTP_DECR_CHK_COUNT();
5073                 /* sa_ignore FREED_MEMORY */
5074         }
5075         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5076                 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5077                 if (chk->data) {
5078                         sctp_m_freem(chk->data);
5079                         chk->data = NULL;
5080                 }
5081                 if (chk->holds_key_ref)
5082                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5083                 sctp_free_remote_addr(chk->whoTo);
5084                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5085                 SCTP_DECR_CHK_COUNT();
5086                 /* sa_ignore FREED_MEMORY */
5087         }
5088
5089         if (asoc->mapping_array) {
5090                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5091                 asoc->mapping_array = NULL;
5092         }
5093         if (asoc->nr_mapping_array) {
5094                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5095                 asoc->nr_mapping_array = NULL;
5096         }
5097         /* the stream outs */
5098         if (asoc->strmout) {
5099                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5100                 asoc->strmout = NULL;
5101         }
5102         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5103         if (asoc->strmin) {
5104                 struct sctp_queued_to_read *ctl, *nctl;
5105
5106                 for (i = 0; i < asoc->streamincnt; i++) {
5107                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5108                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5109                                 sctp_free_remote_addr(ctl->whoFrom);
5110                                 if (ctl->data) {
5111                                         sctp_m_freem(ctl->data);
5112                                         ctl->data = NULL;
5113                                 }
5114                                 /*
5115                                  * We don't free the address here since all
5116                                  * the net's were freed above.
5117                                  */
5118                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5119                                 SCTP_DECR_READQ_COUNT();
5120                         }
5121                 }
5122                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5123                 asoc->strmin = NULL;
5124         }
5125         asoc->streamincnt = 0;
5126         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5127 #ifdef INVARIANTS
5128                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5129                         panic("no net's left alloc'ed, or list points to itself");
5130                 }
5131 #endif
5132                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5133                 sctp_free_remote_addr(net);
5134         }
5135         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5136                 /* sa_ignore FREED_MEMORY */
5137                 sctp_remove_laddr(laddr);
5138         }
5139
5140         /* pending asconf (address) parameters */
5141         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5142                 /* sa_ignore FREED_MEMORY */
5143                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5144                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5145         }
5146         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5147                 /* sa_ignore FREED_MEMORY */
5148                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5149                 if (aack->data != NULL) {
5150                         sctp_m_freem(aack->data);
5151                 }
5152                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5153         }
5154         /* clean up auth stuff */
5155         if (asoc->local_hmacs)
5156                 sctp_free_hmaclist(asoc->local_hmacs);
5157         if (asoc->peer_hmacs)
5158                 sctp_free_hmaclist(asoc->peer_hmacs);
5159
5160         if (asoc->local_auth_chunks)
5161                 sctp_free_chunklist(asoc->local_auth_chunks);
5162         if (asoc->peer_auth_chunks)
5163                 sctp_free_chunklist(asoc->peer_auth_chunks);
5164
5165         sctp_free_authinfo(&asoc->authinfo);
5166
5167         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5168                 LIST_REMOVE(shared_key, next);
5169                 sctp_free_sharedkey(shared_key);
5170                 /* sa_ignore FREED_MEMORY */
5171         }
5172
5173         /* Insert new items here :> */
5174
5175         /* Get rid of LOCK */
5176         SCTP_TCB_UNLOCK(stcb);
5177         SCTP_TCB_LOCK_DESTROY(stcb);
5178         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5179         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5180                 SCTP_INP_INFO_WUNLOCK();
5181                 SCTP_INP_RLOCK(inp);
5182         }
5183 #ifdef SCTP_TRACK_FREED_ASOCS
5184         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5185                 /* now clean up the tasoc itself */
5186                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5187                 SCTP_DECR_ASOC_COUNT();
5188         } else {
5189                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5190         }
5191 #else
5192         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5193         SCTP_DECR_ASOC_COUNT();
5194 #endif
5195         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5196                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5197                         /*
5198                          * If its NOT the inp_free calling us AND sctp_close
5199                          * as been called, we call back...
5200                          */
5201                         SCTP_INP_RUNLOCK(inp);
5202                         /*
5203                          * This will start the kill timer (if we are the
5204                          * last one) since we hold an increment yet. But
5205                          * this is the only safe way to do this since
5206                          * otherwise if the socket closes at the same time
5207                          * we are here we might collide in the cleanup.
5208                          */
5209                         sctp_inpcb_free(inp,
5210                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5211                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5212                         SCTP_INP_DECR_REF(inp);
5213                         goto out_of;
5214                 } else {
5215                         /* The socket is still open. */
5216                         SCTP_INP_DECR_REF(inp);
5217                 }
5218         }
5219         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5220                 SCTP_INP_RUNLOCK(inp);
5221         }
5222 out_of:
5223         /* destroyed the asoc */
5224 #ifdef SCTP_LOG_CLOSING
5225         sctp_log_closing(inp, NULL, 11);
5226 #endif
5227         return (1);
5228 }
5229
5230
5231
5232 /*
5233  * determine if a destination is "reachable" based upon the addresses bound
5234  * to the current endpoint (e.g. only v4 or v6 currently bound)
5235  */
5236 /*
5237  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5238  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5239  * types bound as its endpoint
5240  */
5241 int
5242 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5243 {
5244         struct sctp_inpcb *inp;
5245         int answer;
5246
5247         /*
5248          * No locks here, the TCB, in all cases is already locked and an
5249          * assoc is up. There is either a INP lock by the caller applied (in
5250          * asconf case when deleting an address) or NOT in the HB case,
5251          * however if HB then the INP increment is up and the INP will not
5252          * be removed (on top of the fact that we have a TCB lock). So we
5253          * only want to read the sctp_flags, which is either bound-all or
5254          * not.. no protection needed since once an assoc is up you can't be
5255          * changing your binding.
5256          */
5257         inp = stcb->sctp_ep;
5258         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5259                 /* if bound all, destination is not restricted */
5260                 /*
5261                  * RRS: Question during lock work: Is this correct? If you
5262                  * are bound-all you still might need to obey the V4--V6
5263                  * flags??? IMO this bound-all stuff needs to be removed!
5264                  */
5265                 return (1);
5266         }
5267         /* NOTE: all "scope" checks are done when local addresses are added */
5268         switch (destaddr->sa_family) {
5269 #ifdef INET6
5270         case AF_INET6:
5271                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5272                 break;
5273 #endif
5274 #ifdef INET
5275         case AF_INET:
5276                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5277                 break;
5278 #endif
5279         default:
5280                 /* invalid family, so it's unreachable */
5281                 answer = 0;
5282                 break;
5283         }
5284         return (answer);
5285 }
5286
5287 /*
5288  * update the inp_vflags on an endpoint
5289  */
5290 static void
5291 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5292 {
5293         struct sctp_laddr *laddr;
5294
5295         /* first clear the flag */
5296         inp->ip_inp.inp.inp_vflag = 0;
5297         /* set the flag based on addresses on the ep list */
5298         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5299                 if (laddr->ifa == NULL) {
5300                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5301                             __FUNCTION__);
5302                         continue;
5303                 }
5304                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5305                         continue;
5306                 }
5307                 switch (laddr->ifa->address.sa.sa_family) {
5308 #ifdef INET6
5309                 case AF_INET6:
5310                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5311                         break;
5312 #endif
5313 #ifdef INET
5314                 case AF_INET:
5315                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5316                         break;
5317 #endif
5318                 default:
5319                         break;
5320                 }
5321         }
5322 }
5323
5324 /*
5325  * Add the address to the endpoint local address list There is nothing to be
5326  * done if we are bound to all addresses
5327  */
5328 void
5329 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5330 {
5331         struct sctp_laddr *laddr;
5332         int fnd, error = 0;
5333
5334         fnd = 0;
5335
5336         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5337                 /* You are already bound to all. You have it already */
5338                 return;
5339         }
5340 #ifdef INET6
5341         if (ifa->address.sa.sa_family == AF_INET6) {
5342                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5343                         /* Can't bind a non-useable addr. */
5344                         return;
5345                 }
5346         }
5347 #endif
5348         /* first, is it already present? */
5349         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5350                 if (laddr->ifa == ifa) {
5351                         fnd = 1;
5352                         break;
5353                 }
5354         }
5355
5356         if (fnd == 0) {
5357                 /* Not in the ep list */
5358                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5359                 if (error != 0)
5360                         return;
5361                 inp->laddr_count++;
5362                 /* update inp_vflag flags */
5363                 switch (ifa->address.sa.sa_family) {
5364 #ifdef INET6
5365                 case AF_INET6:
5366                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5367                         break;
5368 #endif
5369 #ifdef INET
5370                 case AF_INET:
5371                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5372                         break;
5373 #endif
5374                 default:
5375                         break;
5376                 }
5377         }
5378         return;
5379 }
5380
5381
5382 /*
5383  * select a new (hopefully reachable) destination net (should only be used
5384  * when we deleted an ep addr that is the only usable source address to reach
5385  * the destination net)
5386  */
5387 static void
5388 sctp_select_primary_destination(struct sctp_tcb *stcb)
5389 {
5390         struct sctp_nets *net;
5391
5392         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5393                 /* for now, we'll just pick the first reachable one we find */
5394                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5395                         continue;
5396                 if (sctp_destination_is_reachable(stcb,
5397                     (struct sockaddr *)&net->ro._l_addr)) {
5398                         /* found a reachable destination */
5399                         stcb->asoc.primary_destination = net;
5400                 }
5401         }
5402         /* I can't there from here! ...we're gonna die shortly... */
5403 }
5404
5405
5406 /*
5407  * Delete the address from the endpoint local address list There is nothing
5408  * to be done if we are bound to all addresses
5409  */
5410 void
5411 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5412 {
5413         struct sctp_laddr *laddr;
5414         int fnd;
5415
5416         fnd = 0;
5417         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5418                 /* You are already bound to all. You have it already */
5419                 return;
5420         }
5421         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5422                 if (laddr->ifa == ifa) {
5423                         fnd = 1;
5424                         break;
5425                 }
5426         }
5427         if (fnd && (inp->laddr_count < 2)) {
5428                 /* can't delete unless there are at LEAST 2 addresses */
5429                 return;
5430         }
5431         if (fnd) {
5432                 /*
5433                  * clean up any use of this address go through our
5434                  * associations and clear any last_used_address that match
5435                  * this one for each assoc, see if a new primary_destination
5436                  * is needed
5437                  */
5438                 struct sctp_tcb *stcb;
5439
5440                 /* clean up "next_addr_touse" */
5441                 if (inp->next_addr_touse == laddr)
5442                         /* delete this address */
5443                         inp->next_addr_touse = NULL;
5444
5445                 /* clean up "last_used_address" */
5446                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5447                         struct sctp_nets *net;
5448
5449                         SCTP_TCB_LOCK(stcb);
5450                         if (stcb->asoc.last_used_address == laddr)
5451                                 /* delete this address */
5452                                 stcb->asoc.last_used_address = NULL;
5453                         /*
5454                          * Now spin through all the nets and purge any ref
5455                          * to laddr
5456                          */
5457                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5458                                 if (net->ro._s_addr &&
5459                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5460                                         /* Yep, purge src address selected */
5461                                         sctp_rtentry_t *rt;
5462
5463                                         /* delete this address if cached */
5464                                         rt = net->ro.ro_rt;
5465                                         if (rt != NULL) {
5466                                                 RTFREE(rt);
5467                                                 net->ro.ro_rt = NULL;
5468                                         }
5469                                         sctp_free_ifa(net->ro._s_addr);
5470                                         net->ro._s_addr = NULL;
5471                                         net->src_addr_selected = 0;
5472                                 }
5473                         }
5474                         SCTP_TCB_UNLOCK(stcb);
5475                 }               /* for each tcb */
5476                 /* remove it from the ep list */
5477                 sctp_remove_laddr(laddr);
5478                 inp->laddr_count--;
5479                 /* update inp_vflag flags */
5480                 sctp_update_ep_vflag(inp);
5481         }
5482         return;
5483 }
5484
5485 /*
5486  * Add the address to the TCB local address restricted list.
5487  * This is a "pending" address list (eg. addresses waiting for an
5488  * ASCONF-ACK response) and cannot be used as a valid source address.
5489  */
5490 void
5491 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5492 {
5493         struct sctp_laddr *laddr;
5494         struct sctpladdr *list;
5495
5496         /*
5497          * Assumes TCB is locked.. and possibly the INP. May need to
5498          * confirm/fix that if we need it and is not the case.
5499          */
5500         list = &stcb->asoc.sctp_restricted_addrs;
5501
5502 #ifdef INET6
5503         if (ifa->address.sa.sa_family == AF_INET6) {
5504                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5505                         /* Can't bind a non-existent addr. */
5506                         return;
5507                 }
5508         }
5509 #endif
5510         /* does the address already exist? */
5511         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5512                 if (laddr->ifa == ifa) {
5513                         return;
5514                 }
5515         }
5516
5517         /* add to the list */
5518         (void)sctp_insert_laddr(list, ifa, 0);
5519         return;
5520 }
5521
5522 /*
5523  * insert an laddr entry with the given ifa for the desired list
5524  */
5525 int
5526 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5527 {
5528         struct sctp_laddr *laddr;
5529
5530         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5531         if (laddr == NULL) {
5532                 /* out of memory? */
5533                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5534                 return (EINVAL);
5535         }
5536         SCTP_INCR_LADDR_COUNT();
5537         bzero(laddr, sizeof(*laddr));
5538         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5539         laddr->ifa = ifa;
5540         laddr->action = act;
5541         atomic_add_int(&ifa->refcount, 1);
5542         /* insert it */
5543         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5544
5545         return (0);
5546 }
5547
5548 /*
5549  * Remove an laddr entry from the local address list (on an assoc)
5550  */
5551 void
5552 sctp_remove_laddr(struct sctp_laddr *laddr)
5553 {
5554
5555         /* remove from the list */
5556         LIST_REMOVE(laddr, sctp_nxt_addr);
5557         sctp_free_ifa(laddr->ifa);
5558         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5559         SCTP_DECR_LADDR_COUNT();
5560 }
5561
5562 /*
5563  * Remove a local address from the TCB local address restricted list
5564  */
5565 void
5566 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5567 {
5568         struct sctp_inpcb *inp;
5569         struct sctp_laddr *laddr;
5570
5571         /*
5572          * This is called by asconf work. It is assumed that a) The TCB is
5573          * locked and b) The INP is locked. This is true in as much as I can
5574          * trace through the entry asconf code where I did these locks.
5575          * Again, the ASCONF code is a bit different in that it does lock
5576          * the INP during its work often times. This must be since we don't
5577          * want other proc's looking up things while what they are looking
5578          * up is changing :-D
5579          */
5580
5581         inp = stcb->sctp_ep;
5582         /* if subset bound and don't allow ASCONF's, can't delete last */
5583         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5584             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5585                 if (stcb->sctp_ep->laddr_count < 2) {
5586                         /* can't delete last address */
5587                         return;
5588                 }
5589         }
5590         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5591                 /* remove the address if it exists */
5592                 if (laddr->ifa == NULL)
5593                         continue;
5594                 if (laddr->ifa == ifa) {
5595                         sctp_remove_laddr(laddr);
5596                         return;
5597                 }
5598         }
5599
5600         /* address not found! */
5601         return;
5602 }
5603
5604 /*
5605  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5606  */
5607 /* sysctl */
5608 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5609 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5610
5611
5612
5613 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5614 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5615 int *sctp_cpuarry = NULL;
5616 void
5617 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5618 {
5619         /* Queue a packet to a processor for the specified core */
5620         struct sctp_mcore_queue *qent;
5621         struct sctp_mcore_ctrl *wkq;
5622         int need_wake = 0;
5623
5624         if (sctp_mcore_workers == NULL) {
5625                 /* Something went way bad during setup */
5626                 sctp_input_with_port(m, off, 0);
5627                 return;
5628         }
5629         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5630             (sizeof(struct sctp_mcore_queue)),
5631             SCTP_M_MCORE);
5632         if (qent == NULL) {
5633                 /* This is trouble  */
5634                 sctp_input_with_port(m, off, 0);
5635                 return;
5636         }
5637         qent->vn = curvnet;
5638         qent->m = m;
5639         qent->off = off;
5640         qent->v6 = 0;
5641         wkq = &sctp_mcore_workers[cpu_to_use];
5642         SCTP_MCORE_QLOCK(wkq);
5643
5644         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5645         if (wkq->running == 0) {
5646                 need_wake = 1;
5647         }
5648         SCTP_MCORE_QUNLOCK(wkq);
5649         if (need_wake) {
5650                 wakeup(&wkq->running);
5651         }
5652 }
5653
5654 static void
5655 sctp_mcore_thread(void *arg)
5656 {
5657
5658         struct sctp_mcore_ctrl *wkq;
5659         struct sctp_mcore_queue *qent;
5660
5661         wkq = (struct sctp_mcore_ctrl *)arg;
5662         struct mbuf *m;
5663         int off, v6;
5664
5665         /* Wait for first tickle */
5666         SCTP_MCORE_LOCK(wkq);
5667         wkq->running = 0;
5668         msleep(&wkq->running,
5669             &wkq->core_mtx,
5670             0, "wait for pkt", 0);
5671         SCTP_MCORE_UNLOCK(wkq);
5672
5673         /* Bind to our cpu */
5674         thread_lock(curthread);
5675         sched_bind(curthread, wkq->cpuid);
5676         thread_unlock(curthread);
5677
5678         /* Now lets start working */
5679         SCTP_MCORE_LOCK(wkq);
5680         /* Now grab lock and go */
5681         for (;;) {
5682                 SCTP_MCORE_QLOCK(wkq);
5683 skip_sleep:
5684                 wkq->running = 1;
5685                 qent = TAILQ_FIRST(&wkq->que);
5686                 if (qent) {
5687                         TAILQ_REMOVE(&wkq->que, qent, next);
5688                         SCTP_MCORE_QUNLOCK(wkq);
5689                         CURVNET_SET(qent->vn);
5690                         m = qent->m;
5691                         off = qent->off;
5692                         v6 = qent->v6;
5693                         SCTP_FREE(qent, SCTP_M_MCORE);
5694                         if (v6 == 0) {
5695                                 sctp_input_with_port(m, off, 0);
5696                         } else {
5697                                 SCTP_PRINTF("V6 not yet supported\n");
5698                                 sctp_m_freem(m);
5699                         }
5700                         CURVNET_RESTORE();
5701                         SCTP_MCORE_QLOCK(wkq);
5702                 }
5703                 wkq->running = 0;
5704                 if (!TAILQ_EMPTY(&wkq->que)) {
5705                         goto skip_sleep;
5706                 }
5707                 SCTP_MCORE_QUNLOCK(wkq);
5708                 msleep(&wkq->running,
5709                     &wkq->core_mtx,
5710                     0, "wait for pkt", 0);
5711         }
5712 }
5713
5714 static void
5715 sctp_startup_mcore_threads(void)
5716 {
5717         int i, cpu;
5718
5719         if (mp_ncpus == 1)
5720                 return;
5721
5722         if (sctp_mcore_workers != NULL) {
5723                 /*
5724                  * Already been here in some previous vnet?
5725                  */
5726                 return;
5727         }
5728         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5729             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5730             SCTP_M_MCORE);
5731         if (sctp_mcore_workers == NULL) {
5732                 /* TSNH I hope */
5733                 return;
5734         }
5735         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5736             sizeof(struct sctp_mcore_ctrl)));
5737         /* Init the structures */
5738         for (i = 0; i <= mp_maxid; i++) {
5739                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5740                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5741                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5742                 sctp_mcore_workers[i].cpuid = i;
5743         }
5744         if (sctp_cpuarry == NULL) {
5745                 SCTP_MALLOC(sctp_cpuarry, int *,
5746                     (mp_ncpus * sizeof(int)),
5747                     SCTP_M_MCORE);
5748                 i = 0;
5749                 CPU_FOREACH(cpu) {
5750                         sctp_cpuarry[i] = cpu;
5751                         i++;
5752                 }
5753         }
5754         /* Now start them all */
5755         CPU_FOREACH(cpu) {
5756                 (void)kproc_create(sctp_mcore_thread,
5757                     (void *)&sctp_mcore_workers[cpu],
5758                     &sctp_mcore_workers[cpu].thread_proc,
5759                     RFPROC,
5760                     SCTP_KTHREAD_PAGES,
5761                     SCTP_MCORE_NAME);
5762
5763         }
5764 }
5765
5766 #endif
5767
5768 void
5769 sctp_pcb_init()
5770 {
5771         /*
5772          * SCTP initialization for the PCB structures should be called by
5773          * the sctp_init() funciton.
5774          */
5775         int i;
5776         struct timeval tv;
5777
5778         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5779                 /* error I was called twice */
5780                 return;
5781         }
5782         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5783
5784 #if defined(SCTP_LOCAL_TRACE_BUF)
5785         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5786 #endif
5787 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5788         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5789             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5790             SCTP_M_MCORE);
5791 #endif
5792         (void)SCTP_GETTIME_TIMEVAL(&tv);
5793 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5794         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5795         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5796         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5797 #else
5798         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5799         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5800         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5801 #endif
5802         /* init the empty list of (All) Endpoints */
5803         LIST_INIT(&SCTP_BASE_INFO(listhead));
5804
5805
5806         /* init the hash table of endpoints */
5807         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5808         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5809         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5810         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5811             &SCTP_BASE_INFO(hashasocmark));
5812         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5813             &SCTP_BASE_INFO(hashmark));
5814         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5815             &SCTP_BASE_INFO(hashtcpmark));
5816         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5817
5818
5819         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5820             &SCTP_BASE_INFO(hashvrfmark));
5821
5822         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5823             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5824         /* init the zones */
5825         /*
5826          * FIX ME: Should check for NULL returns, but if it does fail we are
5827          * doomed to panic anyways... add later maybe.
5828          */
5829         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5830             sizeof(struct sctp_inpcb), maxsockets);
5831
5832         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5833             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5834
5835         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5836             sizeof(struct sctp_laddr),
5837             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5838
5839         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5840             sizeof(struct sctp_nets),
5841             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5842
5843         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5844             sizeof(struct sctp_tmit_chunk),
5845             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5846
5847         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5848             sizeof(struct sctp_queued_to_read),
5849             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5850
5851         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5852             sizeof(struct sctp_stream_queue_pending),
5853             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5854
5855         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5856             sizeof(struct sctp_asconf),
5857             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5858
5859         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5860             sizeof(struct sctp_asconf_ack),
5861             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5862
5863
5864         /* Master Lock INIT for info structure */
5865         SCTP_INP_INFO_LOCK_INIT();
5866         SCTP_STATLOG_INIT_LOCK();
5867
5868         SCTP_IPI_COUNT_INIT();
5869         SCTP_IPI_ADDR_INIT();
5870 #ifdef SCTP_PACKET_LOGGING
5871         SCTP_IP_PKTLOG_INIT();
5872 #endif
5873         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5874
5875         SCTP_WQ_ADDR_INIT();
5876         /* not sure if we need all the counts */
5877         SCTP_BASE_INFO(ipi_count_ep) = 0;
5878         /* assoc/tcb zone info */
5879         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5880         /* local addrlist zone info */
5881         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5882         /* remote addrlist zone info */
5883         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5884         /* chunk info */
5885         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5886
5887         /* socket queue zone info */
5888         SCTP_BASE_INFO(ipi_count_readq) = 0;
5889
5890         /* stream out queue cont */
5891         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5892
5893         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5894         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5895
5896         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5897
5898         /* Init the TIMEWAIT list */
5899         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5900                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5901         }
5902         sctp_startup_iterator();
5903
5904 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5905         sctp_startup_mcore_threads();
5906 #endif
5907
5908         /*
5909          * INIT the default VRF which for BSD is the only one, other O/S's
5910          * may have more. But initially they must start with one and then
5911          * add the VRF's as addresses are added.
5912          */
5913         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5914 }
5915
5916 /*
5917  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5918  */
5919 void
5920 sctp_pcb_finish(void)
5921 {
5922         struct sctp_vrflist *vrf_bucket;
5923         struct sctp_vrf *vrf, *nvrf;
5924         struct sctp_ifn *ifn, *nifn;
5925         struct sctp_ifa *ifa, *nifa;
5926         struct sctpvtaghead *chain;
5927         struct sctp_tagblock *twait_block, *prev_twait_block;
5928         struct sctp_laddr *wi, *nwi;
5929         int i;
5930         struct sctp_iterator *it, *nit;
5931
5932         /*
5933          * In FreeBSD the iterator thread never exits but we do clean up.
5934          * The only way FreeBSD reaches here is if we have VRF's but we
5935          * still add the ifdef to make it compile on old versions.
5936          */
5937         SCTP_IPI_ITERATOR_WQ_LOCK();
5938         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5939                 if (it->vn != curvnet) {
5940                         continue;
5941                 }
5942                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5943                 if (it->function_atend != NULL) {
5944                         (*it->function_atend) (it->pointer, it->val);
5945                 }
5946                 SCTP_FREE(it, SCTP_M_ITER);
5947         }
5948         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5949         SCTP_ITERATOR_LOCK();
5950         if ((sctp_it_ctl.cur_it) &&
5951             (sctp_it_ctl.cur_it->vn == curvnet)) {
5952                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5953         }
5954         SCTP_ITERATOR_UNLOCK();
5955         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5956         SCTP_WQ_ADDR_LOCK();
5957         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5958                 LIST_REMOVE(wi, sctp_nxt_addr);
5959                 SCTP_DECR_LADDR_COUNT();
5960                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5961         }
5962         SCTP_WQ_ADDR_UNLOCK();
5963
5964         /*
5965          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5966          * destroyed first).
5967          */
5968         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5969         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5970                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5971                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5972                                 /* free the ifa */
5973                                 LIST_REMOVE(ifa, next_bucket);
5974                                 LIST_REMOVE(ifa, next_ifa);
5975                                 SCTP_FREE(ifa, SCTP_M_IFA);
5976                         }
5977                         /* free the ifn */
5978                         LIST_REMOVE(ifn, next_bucket);
5979                         LIST_REMOVE(ifn, next_ifn);
5980                         SCTP_FREE(ifn, SCTP_M_IFN);
5981                 }
5982                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5983                 /* free the vrf */
5984                 LIST_REMOVE(vrf, next_vrf);
5985                 SCTP_FREE(vrf, SCTP_M_VRF);
5986         }
5987         /* free the vrf hashes */
5988         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5989         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5990
5991         /*
5992          * free the TIMEWAIT list elements malloc'd in the function
5993          * sctp_add_vtag_to_timewait()...
5994          */
5995         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5996                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5997                 if (!LIST_EMPTY(chain)) {
5998                         prev_twait_block = NULL;
5999                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6000                                 if (prev_twait_block) {
6001                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6002                                 }
6003                                 prev_twait_block = twait_block;
6004                         }
6005                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6006                 }
6007         }
6008
6009         /* free the locks and mutexes */
6010 #ifdef SCTP_PACKET_LOGGING
6011         SCTP_IP_PKTLOG_DESTROY();
6012 #endif
6013         SCTP_IPI_ADDR_DESTROY();
6014         SCTP_STATLOG_DESTROY();
6015         SCTP_INP_INFO_LOCK_DESTROY();
6016
6017         SCTP_WQ_ADDR_DESTROY();
6018
6019         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6020         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6021         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6022         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6023         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6024         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6025         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6026         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6027         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6028         /* Get rid of other stuff to */
6029         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6030                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6031         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6032                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6033         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6034                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6035 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6036         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6037 #endif
6038 }
6039
6040
6041 int
6042 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6043     int offset, int limit,
6044     struct sockaddr *src, struct sockaddr *dst,
6045     struct sockaddr *altsa)
6046 {
6047         /*
6048          * grub through the INIT pulling addresses and loading them to the
6049          * nets structure in the asoc. The from address in the mbuf should
6050          * also be loaded (if it is not already). This routine can be called
6051          * with either INIT or INIT-ACK's as long as the m points to the IP
6052          * packet and the offset points to the beginning of the parameters.
6053          */
6054         struct sctp_inpcb *inp;
6055         struct sctp_nets *net, *nnet, *net_tmp;
6056         struct sctp_paramhdr *phdr, parm_buf;
6057         struct sctp_tcb *stcb_tmp;
6058         uint16_t ptype, plen;
6059         struct sockaddr *sa;
6060         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6061         struct sctp_auth_random *p_random = NULL;
6062         uint16_t random_len = 0;
6063         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6064         struct sctp_auth_hmac_algo *hmacs = NULL;
6065         uint16_t hmacs_len = 0;
6066         uint8_t saw_asconf = 0;
6067         uint8_t saw_asconf_ack = 0;
6068         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6069         struct sctp_auth_chunk_list *chunks = NULL;
6070         uint16_t num_chunks = 0;
6071         sctp_key_t *new_key;
6072         uint32_t keylen;
6073         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6074         uint8_t ecn_allowed;
6075
6076 #ifdef INET
6077         struct sockaddr_in sin;
6078
6079 #endif
6080 #ifdef INET6
6081         struct sockaddr_in6 sin6;
6082
6083 #endif
6084
6085         /* First get the destination address setup too. */
6086 #ifdef INET
6087         memset(&sin, 0, sizeof(sin));
6088         sin.sin_family = AF_INET;
6089         sin.sin_len = sizeof(sin);
6090         sin.sin_port = stcb->rport;
6091 #endif
6092 #ifdef INET6
6093         memset(&sin6, 0, sizeof(sin6));
6094         sin6.sin6_family = AF_INET6;
6095         sin6.sin6_len = sizeof(struct sockaddr_in6);
6096         sin6.sin6_port = stcb->rport;
6097 #endif
6098         if (altsa) {
6099                 sa = altsa;
6100         } else {
6101                 sa = src;
6102         }
6103         /* Turn off ECN until we get through all params */
6104         ecn_allowed = 0;
6105         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6106                 /* mark all addresses that we have currently on the list */
6107                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6108         }
6109         /* does the source address already exist? if so skip it */
6110         inp = stcb->sctp_ep;
6111         atomic_add_int(&stcb->asoc.refcnt, 1);
6112         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6113         atomic_add_int(&stcb->asoc.refcnt, -1);
6114
6115         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6116                 /* we must add the source address */
6117                 /* no scope set here since we have a tcb already. */
6118                 switch (sa->sa_family) {
6119 #ifdef INET
6120                 case AF_INET:
6121                         if (stcb->asoc.scope.ipv4_addr_legal) {
6122                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6123                                         return (-1);
6124                                 }
6125                         }
6126                         break;
6127 #endif
6128 #ifdef INET6
6129                 case AF_INET6:
6130                         if (stcb->asoc.scope.ipv6_addr_legal) {
6131                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6132                                         return (-2);
6133                                 }
6134                         }
6135                         break;
6136 #endif
6137                 default:
6138                         break;
6139                 }
6140         } else {
6141                 if (net_tmp != NULL && stcb_tmp == stcb) {
6142                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6143                 } else if (stcb_tmp != stcb) {
6144                         /* It belongs to another association? */
6145                         if (stcb_tmp)
6146                                 SCTP_TCB_UNLOCK(stcb_tmp);
6147                         return (-3);
6148                 }
6149         }
6150         if (stcb->asoc.state == 0) {
6151                 /* the assoc was freed? */
6152                 return (-4);
6153         }
6154         /*
6155          * peer must explicitly turn this on. This may have been initialized
6156          * to be "on" in order to allow local addr changes while INIT's are
6157          * in flight.
6158          */
6159         stcb->asoc.peer_supports_asconf = 0;
6160         /* now we must go through each of the params. */
6161         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6162         while (phdr) {
6163                 ptype = ntohs(phdr->param_type);
6164                 plen = ntohs(phdr->param_length);
6165                 /*
6166                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6167                  * (uint32_t)ptype, (int)plen);
6168                  */
6169                 if (offset + plen > limit) {
6170                         break;
6171                 }
6172                 if (plen == 0) {
6173                         break;
6174                 }
6175 #ifdef INET
6176                 if (ptype == SCTP_IPV4_ADDRESS) {
6177                         if (stcb->asoc.scope.ipv4_addr_legal) {
6178                                 struct sctp_ipv4addr_param *p4, p4_buf;
6179
6180                                 /* ok get the v4 address and check/add */
6181                                 phdr = sctp_get_next_param(m, offset,
6182                                     (struct sctp_paramhdr *)&p4_buf,
6183                                     sizeof(p4_buf));
6184                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6185                                     phdr == NULL) {
6186                                         return (-5);
6187                                 }
6188                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6189                                 sin.sin_addr.s_addr = p4->addr;
6190                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6191                                         /* Skip multi-cast addresses */
6192                                         goto next_param;
6193                                 }
6194                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6195                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6196                                         goto next_param;
6197                                 }
6198                                 sa = (struct sockaddr *)&sin;
6199                                 inp = stcb->sctp_ep;
6200                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6201                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6202                                     dst, stcb);
6203                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6204
6205                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6206                                     inp == NULL) {
6207                                         /* we must add the source address */
6208                                         /*
6209                                          * no scope set since we have a tcb
6210                                          * already
6211                                          */
6212
6213                                         /*
6214                                          * we must validate the state again
6215                                          * here
6216                                          */
6217                         add_it_now:
6218                                         if (stcb->asoc.state == 0) {
6219                                                 /* the assoc was freed? */
6220                                                 return (-7);
6221                                         }
6222                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6223                                                 return (-8);
6224                                         }
6225                                 } else if (stcb_tmp == stcb) {
6226                                         if (stcb->asoc.state == 0) {
6227                                                 /* the assoc was freed? */
6228                                                 return (-10);
6229                                         }
6230                                         if (net != NULL) {
6231                                                 /* clear flag */
6232                                                 net->dest_state &=
6233                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6234                                         }
6235                                 } else {
6236                                         /*
6237                                          * strange, address is in another
6238                                          * assoc? straighten out locks.
6239                                          */
6240                                         if (stcb_tmp) {
6241                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6242                                                         /*
6243                                                          * in setup state we
6244                                                          * abort this guy
6245                                                          */
6246                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6247                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6248                                                         goto add_it_now;
6249                                                 }
6250                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6251                                         }
6252                                         if (stcb->asoc.state == 0) {
6253                                                 /* the assoc was freed? */
6254                                                 return (-12);
6255                                         }
6256                                         return (-13);
6257                                 }
6258                         }
6259                 } else
6260 #endif
6261 #ifdef INET6
6262                 if (ptype == SCTP_IPV6_ADDRESS) {
6263                         if (stcb->asoc.scope.ipv6_addr_legal) {
6264                                 /* ok get the v6 address and check/add */
6265                                 struct sctp_ipv6addr_param *p6, p6_buf;
6266
6267                                 phdr = sctp_get_next_param(m, offset,
6268                                     (struct sctp_paramhdr *)&p6_buf,
6269                                     sizeof(p6_buf));
6270                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6271                                     phdr == NULL) {
6272                                         return (-14);
6273                                 }
6274                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6275                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6276                                     sizeof(p6->addr));
6277                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6278                                         /* Skip multi-cast addresses */
6279                                         goto next_param;
6280                                 }
6281                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6282                                         /*
6283                                          * Link local make no sense without
6284                                          * scope
6285                                          */
6286                                         goto next_param;
6287                                 }
6288                                 sa = (struct sockaddr *)&sin6;
6289                                 inp = stcb->sctp_ep;
6290                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6291                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6292                                     dst, stcb);
6293                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6294                                 if (stcb_tmp == NULL &&
6295                                     (inp == stcb->sctp_ep || inp == NULL)) {
6296                                         /*
6297                                          * we must validate the state again
6298                                          * here
6299                                          */
6300                         add_it_now6:
6301                                         if (stcb->asoc.state == 0) {
6302                                                 /* the assoc was freed? */
6303                                                 return (-16);
6304                                         }
6305                                         /*
6306                                          * we must add the address, no scope
6307                                          * set
6308                                          */
6309                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6310                                                 return (-17);
6311                                         }
6312                                 } else if (stcb_tmp == stcb) {
6313                                         /*
6314                                          * we must validate the state again
6315                                          * here
6316                                          */
6317                                         if (stcb->asoc.state == 0) {
6318                                                 /* the assoc was freed? */
6319                                                 return (-19);
6320                                         }
6321                                         if (net != NULL) {
6322                                                 /* clear flag */
6323                                                 net->dest_state &=
6324                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6325                                         }
6326                                 } else {
6327                                         /*
6328                                          * strange, address is in another
6329                                          * assoc? straighten out locks.
6330                                          */
6331                                         if (stcb_tmp)
6332                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6333                                                         /*
6334                                                          * in setup state we
6335                                                          * abort this guy
6336                                                          */
6337                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6338                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6339                                                         goto add_it_now6;
6340                                                 }
6341                                         SCTP_TCB_UNLOCK(stcb_tmp);
6342
6343                                         if (stcb->asoc.state == 0) {
6344                                                 /* the assoc was freed? */
6345                                                 return (-21);
6346                                         }
6347                                         return (-22);
6348                                 }
6349                         }
6350                 } else
6351 #endif
6352                 if (ptype == SCTP_ECN_CAPABLE) {
6353                         ecn_allowed = 1;
6354                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6355                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6356                                 struct sctp_adaptation_layer_indication ai,
6357                                                                 *aip;
6358
6359                                 phdr = sctp_get_next_param(m, offset,
6360                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6361                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6362                                 if (aip) {
6363                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6364                                         stcb->asoc.adaptation_needed = 1;
6365                                 }
6366                         }
6367                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6368                         struct sctp_asconf_addr_param lstore, *fee;
6369                         int lptype;
6370                         struct sockaddr *lsa = NULL;
6371
6372 #ifdef INET
6373                         struct sctp_asconf_addrv4_param *fii;
6374
6375 #endif
6376
6377                         stcb->asoc.peer_supports_asconf = 1;
6378                         if (plen > sizeof(lstore)) {
6379                                 return (-23);
6380                         }
6381                         phdr = sctp_get_next_param(m, offset,
6382                             (struct sctp_paramhdr *)&lstore,
6383                             min(plen, sizeof(lstore)));
6384                         if (phdr == NULL) {
6385                                 return (-24);
6386                         }
6387                         fee = (struct sctp_asconf_addr_param *)phdr;
6388                         lptype = ntohs(fee->addrp.ph.param_type);
6389                         switch (lptype) {
6390 #ifdef INET
6391                         case SCTP_IPV4_ADDRESS:
6392                                 if (plen !=
6393                                     sizeof(struct sctp_asconf_addrv4_param)) {
6394                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6395                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6396                                             plen);
6397                                 } else {
6398                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6399                                         sin.sin_addr.s_addr = fii->addrp.addr;
6400                                         lsa = (struct sockaddr *)&sin;
6401                                 }
6402                                 break;
6403 #endif
6404 #ifdef INET6
6405                         case SCTP_IPV6_ADDRESS:
6406                                 if (plen !=
6407                                     sizeof(struct sctp_asconf_addr_param)) {
6408                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6409                                             (int)sizeof(struct sctp_asconf_addr_param),
6410                                             plen);
6411                                 } else {
6412                                         memcpy(sin6.sin6_addr.s6_addr,
6413                                             fee->addrp.addr,
6414                                             sizeof(fee->addrp.addr));
6415                                         lsa = (struct sockaddr *)&sin6;
6416                                 }
6417                                 break;
6418 #endif
6419                         default:
6420                                 break;
6421                         }
6422                         if (lsa) {
6423                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6424                         }
6425                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6426                         stcb->asoc.peer_supports_nat = 1;
6427                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6428                         /* Peer supports pr-sctp */
6429                         stcb->asoc.peer_supports_prsctp = 1;
6430                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6431                         /* A supported extension chunk */
6432                         struct sctp_supported_chunk_types_param *pr_supported;
6433                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6434                         int num_ent, i;
6435
6436                         phdr = sctp_get_next_param(m, offset,
6437                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6438                         if (phdr == NULL) {
6439                                 return (-25);
6440                         }
6441                         stcb->asoc.peer_supports_asconf = 0;
6442                         stcb->asoc.peer_supports_prsctp = 0;
6443                         stcb->asoc.peer_supports_pktdrop = 0;
6444                         stcb->asoc.peer_supports_strreset = 0;
6445                         stcb->asoc.peer_supports_nr_sack = 0;
6446                         stcb->asoc.peer_supports_auth = 0;
6447                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6448                         num_ent = plen - sizeof(struct sctp_paramhdr);
6449                         for (i = 0; i < num_ent; i++) {
6450                                 switch (pr_supported->chunk_types[i]) {
6451                                 case SCTP_ASCONF:
6452                                 case SCTP_ASCONF_ACK:
6453                                         stcb->asoc.peer_supports_asconf = 1;
6454                                         break;
6455                                 case SCTP_FORWARD_CUM_TSN:
6456                                         stcb->asoc.peer_supports_prsctp = 1;
6457                                         break;
6458                                 case SCTP_PACKET_DROPPED:
6459                                         stcb->asoc.peer_supports_pktdrop = 1;
6460                                         break;
6461                                 case SCTP_NR_SELECTIVE_ACK:
6462                                         stcb->asoc.peer_supports_nr_sack = 1;
6463                                         break;
6464                                 case SCTP_STREAM_RESET:
6465                                         stcb->asoc.peer_supports_strreset = 1;
6466                                         break;
6467                                 case SCTP_AUTHENTICATION:
6468                                         stcb->asoc.peer_supports_auth = 1;
6469                                         break;
6470                                 default:
6471                                         /* one I have not learned yet */
6472                                         break;
6473
6474                                 }
6475                         }
6476                 } else if (ptype == SCTP_RANDOM) {
6477                         if (plen > sizeof(random_store))
6478                                 break;
6479                         if (got_random) {
6480                                 /* already processed a RANDOM */
6481                                 goto next_param;
6482                         }
6483                         phdr = sctp_get_next_param(m, offset,
6484                             (struct sctp_paramhdr *)random_store,
6485                             min(sizeof(random_store), plen));
6486                         if (phdr == NULL)
6487                                 return (-26);
6488                         p_random = (struct sctp_auth_random *)phdr;
6489                         random_len = plen - sizeof(*p_random);
6490                         /* enforce the random length */
6491                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6492                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6493                                 return (-27);
6494                         }
6495                         got_random = 1;
6496                 } else if (ptype == SCTP_HMAC_LIST) {
6497                         int num_hmacs;
6498                         int i;
6499
6500                         if (plen > sizeof(hmacs_store))
6501                                 break;
6502                         if (got_hmacs) {
6503                                 /* already processed a HMAC list */
6504                                 goto next_param;
6505                         }
6506                         phdr = sctp_get_next_param(m, offset,
6507                             (struct sctp_paramhdr *)hmacs_store,
6508                             min(plen, sizeof(hmacs_store)));
6509                         if (phdr == NULL)
6510                                 return (-28);
6511                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6512                         hmacs_len = plen - sizeof(*hmacs);
6513                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6514                         /* validate the hmac list */
6515                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6516                                 return (-29);
6517                         }
6518                         if (stcb->asoc.peer_hmacs != NULL)
6519                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6520                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6521                         if (stcb->asoc.peer_hmacs != NULL) {
6522                                 for (i = 0; i < num_hmacs; i++) {
6523                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6524                                             ntohs(hmacs->hmac_ids[i]));
6525                                 }
6526                         }
6527                         got_hmacs = 1;
6528                 } else if (ptype == SCTP_CHUNK_LIST) {
6529                         int i;
6530
6531                         if (plen > sizeof(chunks_store))
6532                                 break;
6533                         if (got_chklist) {
6534                                 /* already processed a Chunks list */
6535                                 goto next_param;
6536                         }
6537                         phdr = sctp_get_next_param(m, offset,
6538                             (struct sctp_paramhdr *)chunks_store,
6539                             min(plen, sizeof(chunks_store)));
6540                         if (phdr == NULL)
6541                                 return (-30);
6542                         chunks = (struct sctp_auth_chunk_list *)phdr;
6543                         num_chunks = plen - sizeof(*chunks);
6544                         if (stcb->asoc.peer_auth_chunks != NULL)
6545                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6546                         else
6547                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6548                         for (i = 0; i < num_chunks; i++) {
6549                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6550                                     stcb->asoc.peer_auth_chunks);
6551                                 /* record asconf/asconf-ack if listed */
6552                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6553                                         saw_asconf = 1;
6554                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6555                                         saw_asconf_ack = 1;
6556
6557                         }
6558                         got_chklist = 1;
6559                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6560                             (ptype == SCTP_STATE_COOKIE) ||
6561                             (ptype == SCTP_UNRECOG_PARAM) ||
6562                             (ptype == SCTP_COOKIE_PRESERVE) ||
6563                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6564                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6565                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6566                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6567                     (ptype == SCTP_SUCCESS_REPORT)) {
6568                          /* don't care */ ;
6569                 } else {
6570                         if ((ptype & 0x8000) == 0x0000) {
6571                                 /*
6572                                  * must stop processing the rest of the
6573                                  * param's. Any report bits were handled
6574                                  * with the call to
6575                                  * sctp_arethere_unrecognized_parameters()
6576                                  * when the INIT or INIT-ACK was first seen.
6577                                  */
6578                                 break;
6579                         }
6580                 }
6581
6582 next_param:
6583                 offset += SCTP_SIZE32(plen);
6584                 if (offset >= limit) {
6585                         break;
6586                 }
6587                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6588                     sizeof(parm_buf));
6589         }
6590         /* Now check to see if we need to purge any addresses */
6591         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6592                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6593                     SCTP_ADDR_NOT_IN_ASSOC) {
6594                         /* This address has been removed from the asoc */
6595                         /* remove and free it */
6596                         stcb->asoc.numnets--;
6597                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6598                         sctp_free_remote_addr(net);
6599                         if (net == stcb->asoc.primary_destination) {
6600                                 stcb->asoc.primary_destination = NULL;
6601                                 sctp_select_primary_destination(stcb);
6602                         }
6603                 }
6604         }
6605         if (ecn_allowed == 0) {
6606                 stcb->asoc.ecn_allowed = 0;
6607         }
6608         /* validate authentication required parameters */
6609         if (got_random && got_hmacs) {
6610                 stcb->asoc.peer_supports_auth = 1;
6611         } else {
6612                 stcb->asoc.peer_supports_auth = 0;
6613         }
6614         if (!stcb->asoc.peer_supports_auth && got_chklist) {
6615                 /* peer does not support auth but sent a chunks list? */
6616                 return (-31);
6617         }
6618         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6619             !stcb->asoc.peer_supports_auth) {
6620                 /* peer supports asconf but not auth? */
6621                 return (-32);
6622         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6623             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6624                 return (-33);
6625         }
6626         /* concatenate the full random key */
6627         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6628         if (chunks != NULL) {
6629                 keylen += sizeof(*chunks) + num_chunks;
6630         }
6631         new_key = sctp_alloc_key(keylen);
6632         if (new_key != NULL) {
6633                 /* copy in the RANDOM */
6634                 if (p_random != NULL) {
6635                         keylen = sizeof(*p_random) + random_len;
6636                         bcopy(p_random, new_key->key, keylen);
6637                 }
6638                 /* append in the AUTH chunks */
6639                 if (chunks != NULL) {
6640                         bcopy(chunks, new_key->key + keylen,
6641                             sizeof(*chunks) + num_chunks);
6642                         keylen += sizeof(*chunks) + num_chunks;
6643                 }
6644                 /* append in the HMACs */
6645                 if (hmacs != NULL) {
6646                         bcopy(hmacs, new_key->key + keylen,
6647                             sizeof(*hmacs) + hmacs_len);
6648                 }
6649         } else {
6650                 /* failed to get memory for the key */
6651                 return (-34);
6652         }
6653         if (stcb->asoc.authinfo.peer_random != NULL)
6654                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6655         stcb->asoc.authinfo.peer_random = new_key;
6656         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6657         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6658
6659         return (0);
6660 }
6661
6662 int
6663 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6664     struct sctp_nets *net)
6665 {
6666         /* make sure the requested primary address exists in the assoc */
6667         if (net == NULL && sa)
6668                 net = sctp_findnet(stcb, sa);
6669
6670         if (net == NULL) {
6671                 /* didn't find the requested primary address! */
6672                 return (-1);
6673         } else {
6674                 /* set the primary address */
6675                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6676                         /* Must be confirmed, so queue to set */
6677                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6678                         return (0);
6679                 }
6680                 stcb->asoc.primary_destination = net;
6681                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6682                         sctp_free_remote_addr(stcb->asoc.alternate);
6683                         stcb->asoc.alternate = NULL;
6684                 }
6685                 net = TAILQ_FIRST(&stcb->asoc.nets);
6686                 if (net != stcb->asoc.primary_destination) {
6687                         /*
6688                          * first one on the list is NOT the primary
6689                          * sctp_cmpaddr() is much more efficient if the
6690                          * primary is the first on the list, make it so.
6691                          */
6692                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6693                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6694                 }
6695                 return (0);
6696         }
6697 }
6698
6699 int
6700 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6701 {
6702         /*
6703          * This function serves two purposes. It will see if a TAG can be
6704          * re-used and return 1 for yes it is ok and 0 for don't use that
6705          * tag. A secondary function it will do is purge out old tags that
6706          * can be removed.
6707          */
6708         struct sctpvtaghead *chain;
6709         struct sctp_tagblock *twait_block;
6710         struct sctpasochead *head;
6711         struct sctp_tcb *stcb;
6712         int i;
6713
6714         SCTP_INP_INFO_RLOCK();
6715         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6716             SCTP_BASE_INFO(hashasocmark))];
6717         if (head == NULL) {
6718                 /* invalid vtag */
6719                 goto skip_vtag_check;
6720         }
6721         LIST_FOREACH(stcb, head, sctp_asocs) {
6722                 /*
6723                  * We choose not to lock anything here. TCB's can't be
6724                  * removed since we have the read lock, so they can't be
6725                  * freed on us, same thing for the INP. I may be wrong with
6726                  * this assumption, but we will go with it for now :-)
6727                  */
6728                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6729                         continue;
6730                 }
6731                 if (stcb->asoc.my_vtag == tag) {
6732                         /* candidate */
6733                         if (stcb->rport != rport) {
6734                                 continue;
6735                         }
6736                         if (stcb->sctp_ep->sctp_lport != lport) {
6737                                 continue;
6738                         }
6739                         /* Its a used tag set */
6740                         SCTP_INP_INFO_RUNLOCK();
6741                         return (0);
6742                 }
6743         }
6744 skip_vtag_check:
6745
6746         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6747         /* Now what about timed wait ? */
6748         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6749                 /*
6750                  * Block(s) are present, lets see if we have this tag in the
6751                  * list
6752                  */
6753                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6754                         if (twait_block->vtag_block[i].v_tag == 0) {
6755                                 /* not used */
6756                                 continue;
6757                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6758                             now->tv_sec) {
6759                                 /* Audit expires this guy */
6760                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6761                                 twait_block->vtag_block[i].v_tag = 0;
6762                                 twait_block->vtag_block[i].lport = 0;
6763                                 twait_block->vtag_block[i].rport = 0;
6764                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6765                                     (twait_block->vtag_block[i].lport == lport) &&
6766                             (twait_block->vtag_block[i].rport == rport)) {
6767                                 /* Bad tag, sorry :< */
6768                                 SCTP_INP_INFO_RUNLOCK();
6769                                 return (0);
6770                         }
6771                 }
6772         }
6773         SCTP_INP_INFO_RUNLOCK();
6774         return (1);
6775 }
6776
6777 static void
6778 sctp_drain_mbufs(struct sctp_tcb *stcb)
6779 {
6780         /*
6781          * We must hunt this association for MBUF's past the cumack (i.e.
6782          * out of order data that we can renege on).
6783          */
6784         struct sctp_association *asoc;
6785         struct sctp_tmit_chunk *chk, *nchk;
6786         uint32_t cumulative_tsn_p1;
6787         struct sctp_queued_to_read *ctl, *nctl;
6788         int cnt, strmat;
6789         uint32_t gap, i;
6790         int fnd = 0;
6791
6792         /* We look for anything larger than the cum-ack + 1 */
6793
6794         asoc = &stcb->asoc;
6795         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6796                 /* none we can reneg on. */
6797                 return;
6798         }
6799         SCTP_STAT_INCR(sctps_protocol_drains_done);
6800         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6801         cnt = 0;
6802         /* First look in the re-assembly queue */
6803         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6804                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6805                         /* Yep it is above cum-ack */
6806                         cnt++;
6807                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6808                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6809                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6810                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6811                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6812                         if (chk->data) {
6813                                 sctp_m_freem(chk->data);
6814                                 chk->data = NULL;
6815                         }
6816                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6817                 }
6818         }
6819         /* Ok that was fun, now we will drain all the inbound streams? */
6820         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6821                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6822                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6823                                 /* Yep it is above cum-ack */
6824                                 cnt++;
6825                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6826                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6827                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6828                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6829                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6830                                 if (ctl->data) {
6831                                         sctp_m_freem(ctl->data);
6832                                         ctl->data = NULL;
6833                                 }
6834                                 sctp_free_remote_addr(ctl->whoFrom);
6835                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6836                                 SCTP_DECR_READQ_COUNT();
6837                         }
6838                 }
6839         }
6840         if (cnt) {
6841                 /* We must back down to see what the new highest is */
6842                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6843                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6844                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6845                                 asoc->highest_tsn_inside_map = i;
6846                                 fnd = 1;
6847                                 break;
6848                         }
6849                 }
6850                 if (!fnd) {
6851                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6852                 }
6853                 /*
6854                  * Question, should we go through the delivery queue? The
6855                  * only reason things are on here is the app not reading OR
6856                  * a p-d-api up. An attacker COULD send enough in to
6857                  * initiate the PD-API and then send a bunch of stuff to
6858                  * other streams... these would wind up on the delivery
6859                  * queue.. and then we would not get to them. But in order
6860                  * to do this I then have to back-track and un-deliver
6861                  * sequence numbers in streams.. el-yucko. I think for now
6862                  * we will NOT look at the delivery queue and leave it to be
6863                  * something to consider later. An alternative would be to
6864                  * abort the P-D-API with a notification and then deliver
6865                  * the data.... Or another method might be to keep track of
6866                  * how many times the situation occurs and if we see a
6867                  * possible attack underway just abort the association.
6868                  */
6869 #ifdef SCTP_DEBUG
6870                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6871 #endif
6872                 /*
6873                  * Now do we need to find a new
6874                  * asoc->highest_tsn_inside_map?
6875                  */
6876                 asoc->last_revoke_count = cnt;
6877                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6878                 /* sa_ignore NO_NULL_CHK */
6879                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6880                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6881         }
6882         /*
6883          * Another issue, in un-setting the TSN's in the mapping array we
6884          * DID NOT adjust the highest_tsn marker.  This will cause one of
6885          * two things to occur. It may cause us to do extra work in checking
6886          * for our mapping array movement. More importantly it may cause us
6887          * to SACK every datagram. This may not be a bad thing though since
6888          * we will recover once we get our cum-ack above and all this stuff
6889          * we dumped recovered.
6890          */
6891 }
6892
6893 void
6894 sctp_drain()
6895 {
6896         /*
6897          * We must walk the PCB lists for ALL associations here. The system
6898          * is LOW on MBUF's and needs help. This is where reneging will
6899          * occur. We really hope this does NOT happen!
6900          */
6901         VNET_ITERATOR_DECL(vnet_iter);
6902         VNET_LIST_RLOCK_NOSLEEP();
6903         VNET_FOREACH(vnet_iter) {
6904                 CURVNET_SET(vnet_iter);
6905                 struct sctp_inpcb *inp;
6906                 struct sctp_tcb *stcb;
6907
6908                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6909                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6910 #ifdef VIMAGE
6911                         continue;
6912 #else
6913                         return;
6914 #endif
6915                 }
6916                 SCTP_INP_INFO_RLOCK();
6917                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6918                         /* For each endpoint */
6919                         SCTP_INP_RLOCK(inp);
6920                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6921                                 /* For each association */
6922                                 SCTP_TCB_LOCK(stcb);
6923                                 sctp_drain_mbufs(stcb);
6924                                 SCTP_TCB_UNLOCK(stcb);
6925                         }
6926                         SCTP_INP_RUNLOCK(inp);
6927                 }
6928                 SCTP_INP_INFO_RUNLOCK();
6929                 CURVNET_RESTORE();
6930         }
6931         VNET_LIST_RUNLOCK_NOSLEEP();
6932 }
6933
6934 /*
6935  * start a new iterator
6936  * iterates through all endpoints and associations based on the pcb_state
6937  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6938  * assocs and "ef" (optional) is executed when the iterator completes.
6939  * "inpf" (optional) is executed for each new endpoint as it is being
6940  * iterated through. inpe (optional) is called when the inp completes
6941  * its way through all the stcbs.
6942  */
6943 int
6944 sctp_initiate_iterator(inp_func inpf,
6945     asoc_func af,
6946     inp_func inpe,
6947     uint32_t pcb_state,
6948     uint32_t pcb_features,
6949     uint32_t asoc_state,
6950     void *argp,
6951     uint32_t argi,
6952     end_func ef,
6953     struct sctp_inpcb *s_inp,
6954     uint8_t chunk_output_off)
6955 {
6956         struct sctp_iterator *it = NULL;
6957
6958         if (af == NULL) {
6959                 return (-1);
6960         }
6961         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6962             SCTP_M_ITER);
6963         if (it == NULL) {
6964                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6965                 return (ENOMEM);
6966         }
6967         memset(it, 0, sizeof(*it));
6968         it->function_assoc = af;
6969         it->function_inp = inpf;
6970         if (inpf)
6971                 it->done_current_ep = 0;
6972         else
6973                 it->done_current_ep = 1;
6974         it->function_atend = ef;
6975         it->pointer = argp;
6976         it->val = argi;
6977         it->pcb_flags = pcb_state;
6978         it->pcb_features = pcb_features;
6979         it->asoc_state = asoc_state;
6980         it->function_inp_end = inpe;
6981         it->no_chunk_output = chunk_output_off;
6982         it->vn = curvnet;
6983         if (s_inp) {
6984                 /* Assume lock is held here */
6985                 it->inp = s_inp;
6986                 SCTP_INP_INCR_REF(it->inp);
6987                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
6988         } else {
6989                 SCTP_INP_INFO_RLOCK();
6990                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
6991                 if (it->inp) {
6992                         SCTP_INP_INCR_REF(it->inp);
6993                 }
6994                 SCTP_INP_INFO_RUNLOCK();
6995                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
6996
6997         }
6998         SCTP_IPI_ITERATOR_WQ_LOCK();
6999
7000         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7001         if (sctp_it_ctl.iterator_running == 0) {
7002                 sctp_wakeup_iterator();
7003         }
7004         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7005         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7006         return (0);
7007 }