sys/netinet/sctp_pcb.c

   1 /*-
   2  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
   3  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
   4  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * a) Redistributions of source code must retain the above copyright notice,
  10  *    this list of conditions and the following disclaimer.
  11  *
  12  * b) Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the distribution.
  15  *
  16  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  30  * THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35
  36 #include <netinet/sctp_os.h>
  37 #include <sys/proc.h>
  38 #include <netinet/sctp_var.h>
  39 #include <netinet/sctp_sysctl.h>
  40 #include <netinet/sctp_pcb.h>
  41 #include <netinet/sctputil.h>
  42 #include <netinet/sctp.h>
  43 #include <netinet/sctp_header.h>
  44 #include <netinet/sctp_asconf.h>
  45 #include <netinet/sctp_output.h>
  46 #include <netinet/sctp_timer.h>
  47 #include <netinet/sctp_bsd_addr.h>
  48 #include <netinet/sctp_dtrace_define.h>
  49 #include <netinet/udp.h>
  50 #ifdef INET6
  51 #include <netinet6/ip6_var.h>
  52 #endif
  53 #include <sys/sched.h>
  54 #include <sys/smp.h>
  55 #include <sys/unistd.h>
  56
  57
  58 VNET_DEFINE(struct sctp_base_info, system_base_info);
  59
  60 /* FIX: we don't handle multiple link local scopes */
  61 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  62 #ifdef INET6
  63 int
  64 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  65 {
  66         struct sockaddr_in6 tmp_a, tmp_b;
  67
  68         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  69         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  70                 return (0);
  71         }
  72         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  73         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  74                 return (0);
  75         }
  76         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  77 }
  78
  79 #endif
  80
  81 void
  82 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  83 {
  84         /*
  85          * We really don't need to lock this, but I will just because it
  86          * does not hurt.
  87          */
  88         SCTP_INP_INFO_RLOCK();
  89         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  90         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  91         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  92         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  93         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  94         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  95         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  96         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
  97         SCTP_INP_INFO_RUNLOCK();
  98 }
  99
 100 /*-
 101  * Addresses are added to VRF's (Virtual Router's). For BSD we
 102  * have only the default VRF 0. We maintain a hash list of
 103  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
 104  * these has a list of addresses. When we add a new address
 105  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 106  * not exist we create it and add it to the list of IFN's
 107  * within the VRF. Once we have the sctp_ifn, we add the
 108  * address to the list. So we look something like:
 109  *
 110  * hash-vrf-table
 111  *   vrf-> ifn-> ifn -> ifn
 112  *   vrf    |
 113  *    ...   +--ifa-> ifa -> ifa
 114  *   vrf
 115  *
 116  * We keep these separate lists since the SCTP subsystem will
 117  * point to these from its source address selection nets structure.
 118  * When an address is deleted it does not happen right away on
 119  * the SCTP side, it gets scheduled. What we do when a
 120  * delete happens is immediately remove the address from
 121  * the master list and decrement the refcount. As our
 122  * addip iterator works through and frees the src address
 123  * selection pointing to the sctp_ifa, eventually the refcount
 124  * will reach 0 and we will delete it. Note that it is assumed
 125  * that any locking on system level ifn/ifa is done at the
 126  * caller of these functions and these routines will only
 127  * lock the SCTP structures as they add or delete things.
 128  *
 129  * Other notes on VRF concepts.
 130  *  - An endpoint can be in multiple VRF's
 131  *  - An association lives within a VRF and only one VRF.
 132  *  - Any incoming packet we can deduce the VRF for by
 133  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 134  *  - Any downward send call or connect call must supply the
 135  *    VRF via ancillary data or via some sort of set default
 136  *    VRF socket option call (again for BSD no brainer since
 137  *    the VRF is always 0).
 138  *  - An endpoint may add multiple VRF's to it.
 139  *  - Listening sockets can accept associations in any
 140  *    of the VRF's they are in but the assoc will end up
 141  *    in only one VRF (gotten from the packet or connect/send).
 142  *
 143  */
 144
 145 struct sctp_vrf *
 146 sctp_allocate_vrf(int vrf_id)
 147 {
 148         struct sctp_vrf *vrf = NULL;
 149         struct sctp_vrflist *bucket;
 150
 151         /* First allocate the VRF structure */
 152         vrf = sctp_find_vrf(vrf_id);
 153         if (vrf) {
 154                 /* Already allocated */
 155                 return (vrf);
 156         }
 157         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 158             SCTP_M_VRF);
 159         if (vrf == NULL) {
 160                 /* No memory */
 161 #ifdef INVARIANTS
 162                 panic("No memory for VRF:%d", vrf_id);
 163 #endif
 164                 return (NULL);
 165         }
 166         /* setup the VRF */
 167         memset(vrf, 0, sizeof(struct sctp_vrf));
 168         vrf->vrf_id = vrf_id;
 169         LIST_INIT(&vrf->ifnlist);
 170         vrf->total_ifa_count = 0;
 171         vrf->refcount = 0;
 172         /* now also setup table ids */
 173         SCTP_INIT_VRF_TABLEID(vrf);
 174         /* Init the HASH of addresses */
 175         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 176             &vrf->vrf_addr_hashmark);
 177         if (vrf->vrf_addr_hash == NULL) {
 178                 /* No memory */
 179 #ifdef INVARIANTS
 180                 panic("No memory for VRF:%d", vrf_id);
 181 #endif
 182                 SCTP_FREE(vrf, SCTP_M_VRF);
 183                 return (NULL);
 184         }
 185         /* Add it to the hash table */
 186         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 187         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 188         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 189         return (vrf);
 190 }
 191
 192
 193 struct sctp_ifn *
 194 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 195 {
 196         struct sctp_ifn *sctp_ifnp;
 197         struct sctp_ifnlist *hash_ifn_head;
 198
 199         /*
 200          * We assume the lock is held for the addresses if that's wrong
 201          * problems could occur :-)
 202          */
 203         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 204         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 205                 if (sctp_ifnp->ifn_index == ifn_index) {
 206                         return (sctp_ifnp);
 207                 }
 208                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 209                         return (sctp_ifnp);
 210                 }
 211         }
 212         return (NULL);
 213 }
 214
 215
 216 struct sctp_vrf *
 217 sctp_find_vrf(uint32_t vrf_id)
 218 {
 219         struct sctp_vrflist *bucket;
 220         struct sctp_vrf *liste;
 221
 222         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 223         LIST_FOREACH(liste, bucket, next_vrf) {
 224                 if (vrf_id == liste->vrf_id) {
 225                         return (liste);
 226                 }
 227         }
 228         return (NULL);
 229 }
 230
 231
 232 void
 233 sctp_free_vrf(struct sctp_vrf *vrf)
 234 {
 235         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 236                 if (vrf->vrf_addr_hash) {
 237                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 238                         vrf->vrf_addr_hash = NULL;
 239                 }
 240                 /* We zero'd the count */
 241                 LIST_REMOVE(vrf, next_vrf);
 242                 SCTP_FREE(vrf, SCTP_M_VRF);
 243                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 244         }
 245 }
 246
 247
 248 void
 249 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 250 {
 251         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 252                 /* We zero'd the count */
 253                 if (sctp_ifnp->vrf) {
 254                         sctp_free_vrf(sctp_ifnp->vrf);
 255                 }
 256                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 257                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 258         }
 259 }
 260
 261
 262 void
 263 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 264 {
 265         struct sctp_ifn *sctp_ifnp;
 266
 267         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 268         if (sctp_ifnp != NULL) {
 269                 sctp_ifnp->ifn_mtu = mtu;
 270         }
 271 }
 272
 273
 274 void
 275 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 276 {
 277         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 278                 /* We zero'd the count */
 279                 if (sctp_ifap->ifn_p) {
 280                         sctp_free_ifn(sctp_ifap->ifn_p);
 281                 }
 282                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 283                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 284         }
 285 }
 286
 287
 288 static void
 289 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 290 {
 291         struct sctp_ifn *found;
 292
 293         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 294         if (found == NULL) {
 295                 /* Not in the list.. sorry */
 296                 return;
 297         }
 298         if (hold_addr_lock == 0)
 299                 SCTP_IPI_ADDR_WLOCK();
 300         LIST_REMOVE(sctp_ifnp, next_bucket);
 301         LIST_REMOVE(sctp_ifnp, next_ifn);
 302         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 303             sctp_ifnp->registered_af);
 304         if (hold_addr_lock == 0)
 305                 SCTP_IPI_ADDR_WUNLOCK();
 306         /* Take away the reference, and possibly free it */
 307         sctp_free_ifn(sctp_ifnp);
 308 }
 309
 310
 311 void
 312 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 313     const char *if_name, uint32_t ifn_index)
 314 {
 315         struct sctp_vrf *vrf;
 316         struct sctp_ifa *sctp_ifap;
 317
 318         SCTP_IPI_ADDR_RLOCK();
 319         vrf = sctp_find_vrf(vrf_id);
 320         if (vrf == NULL) {
 321                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 322                 goto out;
 323
 324         }
 325         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 326         if (sctp_ifap == NULL) {
 327                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 328                 goto out;
 329         }
 330         if (sctp_ifap->ifn_p == NULL) {
 331                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 332                 goto out;
 333         }
 334         if (if_name) {
 335                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 336                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 337                             sctp_ifap->ifn_p->ifn_name, if_name);
 338                         goto out;
 339                 }
 340         } else {
 341                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 342                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 343                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 344                         goto out;
 345                 }
 346         }
 347
 348         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 349         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 350 out:
 351         SCTP_IPI_ADDR_RUNLOCK();
 352 }
 353
 354
 355 void
 356 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 357     const char *if_name, uint32_t ifn_index)
 358 {
 359         struct sctp_vrf *vrf;
 360         struct sctp_ifa *sctp_ifap;
 361
 362         SCTP_IPI_ADDR_RLOCK();
 363         vrf = sctp_find_vrf(vrf_id);
 364         if (vrf == NULL) {
 365                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 366                 goto out;
 367
 368         }
 369         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 370         if (sctp_ifap == NULL) {
 371                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 372                 goto out;
 373         }
 374         if (sctp_ifap->ifn_p == NULL) {
 375                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 376                 goto out;
 377         }
 378         if (if_name) {
 379                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 380                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 381                             sctp_ifap->ifn_p->ifn_name, if_name);
 382                         goto out;
 383                 }
 384         } else {
 385                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 386                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 387                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 388                         goto out;
 389                 }
 390         }
 391
 392         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 393         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 394 out:
 395         SCTP_IPI_ADDR_RUNLOCK();
 396 }
 397
 398
 399 /*-
 400  * Add an ifa to an ifn.
 401  * Register the interface as necessary.
 402  * NOTE: ADDR write lock MUST be held.
 403  */
 404 static void
 405 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 406 {
 407         int ifa_af;
 408
 409         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 410         sctp_ifap->ifn_p = sctp_ifnp;
 411         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 412         /* update address counts */
 413         sctp_ifnp->ifa_count++;
 414         ifa_af = sctp_ifap->address.sa.sa_family;
 415         switch (ifa_af) {
 416 #ifdef INET
 417         case AF_INET:
 418                 sctp_ifnp->num_v4++;
 419                 break;
 420 #endif
 421 #ifdef INET6
 422         case AF_INET6:
 423                 sctp_ifnp->num_v6++;
 424                 break;
 425 #endif
 426         default:
 427                 break;
 428         }
 429         if (sctp_ifnp->ifa_count == 1) {
 430                 /* register the new interface */
 431                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 432                 sctp_ifnp->registered_af = ifa_af;
 433         }
 434 }
 435
 436
 437 /*-
 438  * Remove an ifa from its ifn.
 439  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 440  * the interface based on the remaining address families left.
 441  * NOTE: ADDR write lock MUST be held.
 442  */
 443 static void
 444 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 445 {
 446         LIST_REMOVE(sctp_ifap, next_ifa);
 447         if (sctp_ifap->ifn_p) {
 448                 /* update address counts */
 449                 sctp_ifap->ifn_p->ifa_count--;
 450                 switch (sctp_ifap->address.sa.sa_family) {
 451 #ifdef INET
 452                 case AF_INET:
 453                         sctp_ifap->ifn_p->num_v4--;
 454                         break;
 455 #endif
 456 #ifdef INET6
 457                 case AF_INET6:
 458                         sctp_ifap->ifn_p->num_v6--;
 459                         break;
 460 #endif
 461                 default:
 462                         break;
 463                 }
 464
 465                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 466                         /* remove the ifn, possibly freeing it */
 467                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 468                 } else {
 469                         /* re-register address family type, if needed */
 470                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 471                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 472                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 473                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 474                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 475                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 476                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 477                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 478                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 479                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 480                         }
 481                         /* free the ifn refcount */
 482                         sctp_free_ifn(sctp_ifap->ifn_p);
 483                 }
 484                 sctp_ifap->ifn_p = NULL;
 485         }
 486 }
 487
 488
 489 struct sctp_ifa *
 490 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 491     uint32_t ifn_type, const char *if_name, void *ifa,
 492     struct sockaddr *addr, uint32_t ifa_flags,
 493     int dynamic_add)
 494 {
 495         struct sctp_vrf *vrf;
 496         struct sctp_ifn *sctp_ifnp = NULL;
 497         struct sctp_ifa *sctp_ifap = NULL;
 498         struct sctp_ifalist *hash_addr_head;
 499         struct sctp_ifnlist *hash_ifn_head;
 500         uint32_t hash_of_addr;
 501         int new_ifn_af = 0;
 502
 503 #ifdef SCTP_DEBUG
 504         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 505         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 506 #endif
 507         SCTP_IPI_ADDR_WLOCK();
 508         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 509         if (sctp_ifnp) {
 510                 vrf = sctp_ifnp->vrf;
 511         } else {
 512                 vrf = sctp_find_vrf(vrf_id);
 513                 if (vrf == NULL) {
 514                         vrf = sctp_allocate_vrf(vrf_id);
 515                         if (vrf == NULL) {
 516                                 SCTP_IPI_ADDR_WUNLOCK();
 517                                 return (NULL);
 518                         }
 519                 }
 520         }
 521         if (sctp_ifnp == NULL) {
 522                 /*
 523                  * build one and add it, can't hold lock until after malloc
 524                  * done though.
 525                  */
 526                 SCTP_IPI_ADDR_WUNLOCK();
 527                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 528                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 529                 if (sctp_ifnp == NULL) {
 530 #ifdef INVARIANTS
 531                         panic("No memory for IFN");
 532 #endif
 533                         return (NULL);
 534                 }
 535                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 536                 sctp_ifnp->ifn_index = ifn_index;
 537                 sctp_ifnp->ifn_p = ifn;
 538                 sctp_ifnp->ifn_type = ifn_type;
 539                 sctp_ifnp->refcount = 0;
 540                 sctp_ifnp->vrf = vrf;
 541                 atomic_add_int(&vrf->refcount, 1);
 542                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 543                 if (if_name != NULL) {
 544                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
 545                 } else {
 546                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
 547                 }
 548                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 549                 LIST_INIT(&sctp_ifnp->ifalist);
 550                 SCTP_IPI_ADDR_WLOCK();
 551                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 552                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 553                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 554                 new_ifn_af = 1;
 555         }
 556         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 557         if (sctp_ifap) {
 558                 /* Hmm, it already exists? */
 559                 if ((sctp_ifap->ifn_p) &&
 560                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 561                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 562                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 563                             (void *)sctp_ifap);
 564                         if (new_ifn_af) {
 565                                 /* Remove the created one that we don't want */
 566                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 567                         }
 568                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 569                                 /* easy to solve, just switch back to active */
 570                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 571                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 572                                 sctp_ifap->ifn_p = sctp_ifnp;
 573                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 574                         }
 575         exit_stage_left:
 576                         SCTP_IPI_ADDR_WUNLOCK();
 577                         return (sctp_ifap);
 578                 } else {
 579                         if (sctp_ifap->ifn_p) {
 580                                 /*
 581                                  * The last IFN gets the address, remove the
 582                                  * old one
 583                                  */
 584                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 585                                     (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 586                                     sctp_ifap->ifn_p->ifn_index, if_name,
 587                                     ifn_index);
 588                                 /* remove the address from the old ifn */
 589                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 590                                 /* move the address over to the new ifn */
 591                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 592                                 goto exit_stage_left;
 593                         } else {
 594                                 /* repair ifnp which was NULL ? */
 595                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 596                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 597                                     (void *)sctp_ifnp, (void *)sctp_ifap);
 598                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 599                         }
 600                         goto exit_stage_left;
 601                 }
 602         }
 603         SCTP_IPI_ADDR_WUNLOCK();
 604         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 605         if (sctp_ifap == NULL) {
 606 #ifdef INVARIANTS
 607                 panic("No memory for IFA");
 608 #endif
 609                 return (NULL);
 610         }
 611         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 612         sctp_ifap->ifn_p = sctp_ifnp;
 613         atomic_add_int(&sctp_ifnp->refcount, 1);
 614         sctp_ifap->vrf_id = vrf_id;
 615         sctp_ifap->ifa = ifa;
 616         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 617         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 618         sctp_ifap->flags = ifa_flags;
 619         /* Set scope */
 620         switch (sctp_ifap->address.sa.sa_family) {
 621 #ifdef INET
 622         case AF_INET:
 623                 {
 624                         struct sockaddr_in *sin;
 625
 626                         sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
 627                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 628                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 629                                 sctp_ifap->src_is_loop = 1;
 630                         }
 631                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 632                                 sctp_ifap->src_is_priv = 1;
 633                         }
 634                         sctp_ifnp->num_v4++;
 635                         if (new_ifn_af)
 636                                 new_ifn_af = AF_INET;
 637                         break;
 638                 }
 639 #endif
 640 #ifdef INET6
 641         case AF_INET6:
 642                 {
 643                         /* ok to use deprecated addresses? */
 644                         struct sockaddr_in6 *sin6;
 645
 646                         sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
 647                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 648                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 649                                 sctp_ifap->src_is_loop = 1;
 650                         }
 651                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 652                                 sctp_ifap->src_is_priv = 1;
 653                         }
 654                         sctp_ifnp->num_v6++;
 655                         if (new_ifn_af)
 656                                 new_ifn_af = AF_INET6;
 657                         break;
 658                 }
 659 #endif
 660         default:
 661                 new_ifn_af = 0;
 662                 break;
 663         }
 664         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 665
 666         if ((sctp_ifap->src_is_priv == 0) &&
 667             (sctp_ifap->src_is_loop == 0)) {
 668                 sctp_ifap->src_is_glob = 1;
 669         }
 670         SCTP_IPI_ADDR_WLOCK();
 671         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 672         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 673         sctp_ifap->refcount = 1;
 674         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 675         sctp_ifnp->ifa_count++;
 676         vrf->total_ifa_count++;
 677         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 678         if (new_ifn_af) {
 679                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 680                 sctp_ifnp->registered_af = new_ifn_af;
 681         }
 682         SCTP_IPI_ADDR_WUNLOCK();
 683         if (dynamic_add) {
 684                 /*
 685                  * Bump up the refcount so that when the timer completes it
 686                  * will drop back down.
 687                  */
 688                 struct sctp_laddr *wi;
 689
 690                 atomic_add_int(&sctp_ifap->refcount, 1);
 691                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 692                 if (wi == NULL) {
 693                         /*
 694                          * Gak, what can we do? We have lost an address
 695                          * change can you say HOSED?
 696                          */
 697                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 698                         /* Opps, must decrement the count */
 699                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 700                             if_name);
 701                         return (NULL);
 702                 }
 703                 SCTP_INCR_LADDR_COUNT();
 704                 bzero(wi, sizeof(*wi));
 705                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 706                 wi->ifa = sctp_ifap;
 707                 wi->action = SCTP_ADD_IP_ADDRESS;
 708
 709                 SCTP_WQ_ADDR_LOCK();
 710                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 711                 SCTP_WQ_ADDR_UNLOCK();
 712
 713                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 714                     (struct sctp_inpcb *)NULL,
 715                     (struct sctp_tcb *)NULL,
 716                     (struct sctp_nets *)NULL);
 717         } else {
 718                 /* it's ready for use */
 719                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 720         }
 721         return (sctp_ifap);
 722 }
 723
 724 void
 725 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 726     uint32_t ifn_index, const char *if_name)
 727 {
 728         struct sctp_vrf *vrf;
 729         struct sctp_ifa *sctp_ifap = NULL;
 730
 731         SCTP_IPI_ADDR_WLOCK();
 732         vrf = sctp_find_vrf(vrf_id);
 733         if (vrf == NULL) {
 734                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 735                 goto out_now;
 736         }
 737 #ifdef SCTP_DEBUG
 738         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 739         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 740 #endif
 741         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 742         if (sctp_ifap) {
 743                 /* Validate the delete */
 744                 if (sctp_ifap->ifn_p) {
 745                         int valid = 0;
 746
 747                         /*-
 748                          * The name has priority over the ifn_index
 749                          * if its given. We do this especially for
 750                          * panda who might recycle indexes fast.
 751                          */
 752                         if (if_name) {
 753                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 754                                         /* They match its a correct delete */
 755                                         valid = 1;
 756                                 }
 757                         }
 758                         if (!valid) {
 759                                 /* last ditch check ifn_index */
 760                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 761                                         valid = 1;
 762                                 }
 763                         }
 764                         if (!valid) {
 765                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 766                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 767                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 768                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 769                                 SCTP_IPI_ADDR_WUNLOCK();
 770                                 return;
 771                         }
 772                 }
 773                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
 774                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 775                 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
 776                 vrf->total_ifa_count--;
 777                 LIST_REMOVE(sctp_ifap, next_bucket);
 778                 sctp_remove_ifa_from_ifn(sctp_ifap);
 779         }
 780 #ifdef SCTP_DEBUG
 781         else {
 782                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 783                     ifn_index);
 784                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 785         }
 786 #endif
 787
 788 out_now:
 789         SCTP_IPI_ADDR_WUNLOCK();
 790         if (sctp_ifap) {
 791                 struct sctp_laddr *wi;
 792
 793                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 794                 if (wi == NULL) {
 795                         /*
 796                          * Gak, what can we do? We have lost an address
 797                          * change can you say HOSED?
 798                          */
 799                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 800
 801                         /* Oops, must decrement the count */
 802                         sctp_free_ifa(sctp_ifap);
 803                         return;
 804                 }
 805                 SCTP_INCR_LADDR_COUNT();
 806                 bzero(wi, sizeof(*wi));
 807                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 808                 wi->ifa = sctp_ifap;
 809                 wi->action = SCTP_DEL_IP_ADDRESS;
 810                 SCTP_WQ_ADDR_LOCK();
 811                 /*
 812                  * Should this really be a tailq? As it is we will process
 813                  * the newest first :-0
 814                  */
 815                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 816                 SCTP_WQ_ADDR_UNLOCK();
 817
 818                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 819                     (struct sctp_inpcb *)NULL,
 820                     (struct sctp_tcb *)NULL,
 821                     (struct sctp_nets *)NULL);
 822         }
 823         return;
 824 }
 825
 826
 827 static int
 828 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
 829 {
 830         int loopback_scope, ipv4_local_scope, local_scope, site_scope;
 831         int ipv4_addr_legal, ipv6_addr_legal;
 832         struct sctp_vrf *vrf;
 833         struct sctp_ifn *sctp_ifn;
 834         struct sctp_ifa *sctp_ifa;
 835
 836         loopback_scope = stcb->asoc.scope.loopback_scope;
 837         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
 838         local_scope = stcb->asoc.scope.local_scope;
 839         site_scope = stcb->asoc.scope.site_scope;
 840         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
 841         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
 842
 843         SCTP_IPI_ADDR_RLOCK();
 844         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
 845         if (vrf == NULL) {
 846                 /* no vrf, no addresses */
 847                 SCTP_IPI_ADDR_RUNLOCK();
 848                 return (0);
 849         }
 850         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 851                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 852                         if ((loopback_scope == 0) &&
 853                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 854                                 continue;
 855                         }
 856                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 857                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
 858                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
 859                                         /*
 860                                          * We allow pending addresses, where
 861                                          * we have sent an asconf-add to be
 862                                          * considered valid.
 863                                          */
 864                                         continue;
 865                                 }
 866                                 switch (sctp_ifa->address.sa.sa_family) {
 867 #ifdef INET
 868                                 case AF_INET:
 869                                         if (ipv4_addr_legal) {
 870                                                 struct sockaddr_in *sin,
 871                                                            *rsin;
 872
 873                                                 sin = &sctp_ifa->address.sin;
 874                                                 rsin = (struct sockaddr_in *)to;
 875                                                 if ((ipv4_local_scope == 0) &&
 876                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 877                                                         continue;
 878                                                 }
 879                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 880                                                         SCTP_IPI_ADDR_RUNLOCK();
 881                                                         return (1);
 882                                                 }
 883                                         }
 884                                         break;
 885 #endif
 886 #ifdef INET6
 887                                 case AF_INET6:
 888                                         if (ipv6_addr_legal) {
 889                                                 struct sockaddr_in6 *sin6,
 890                                                             *rsin6;
 891
 892                                                 sin6 = &sctp_ifa->address.sin6;
 893                                                 rsin6 = (struct sockaddr_in6 *)to;
 894                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 895                                                         if (local_scope == 0)
 896                                                                 continue;
 897                                                         if (sin6->sin6_scope_id == 0) {
 898                                                                 if (sa6_recoverscope(sin6) != 0)
 899                                                                         continue;
 900                                                         }
 901                                                 }
 902                                                 if ((site_scope == 0) &&
 903                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
 904                                                         continue;
 905                                                 }
 906                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 907                                                         SCTP_IPI_ADDR_RUNLOCK();
 908                                                         return (1);
 909                                                 }
 910                                         }
 911                                         break;
 912 #endif
 913                                 default:
 914                                         /* TSNH */
 915                                         break;
 916                                 }
 917                         }
 918                 }
 919         } else {
 920                 struct sctp_laddr *laddr;
 921
 922                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
 923                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 924                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 925                                 continue;
 926                         }
 927                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
 928                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
 929                                 /*
 930                                  * We allow pending addresses, where we have
 931                                  * sent an asconf-add to be considered
 932                                  * valid.
 933                                  */
 934                                 continue;
 935                         }
 936                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
 937                                 continue;
 938                         }
 939                         switch (to->sa_family) {
 940 #ifdef INET
 941                         case AF_INET:
 942                                 {
 943                                         struct sockaddr_in *sin, *rsin;
 944
 945                                         sin = (struct sockaddr_in *)&laddr->ifa->address.sin;
 946                                         rsin = (struct sockaddr_in *)to;
 947                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 948                                                 SCTP_IPI_ADDR_RUNLOCK();
 949                                                 return (1);
 950                                         }
 951                                         break;
 952                                 }
 953 #endif
 954 #ifdef INET6
 955                         case AF_INET6:
 956                                 {
 957                                         struct sockaddr_in6 *sin6, *rsin6;
 958
 959                                         sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6;
 960                                         rsin6 = (struct sockaddr_in6 *)to;
 961                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 962                                                 SCTP_IPI_ADDR_RUNLOCK();
 963                                                 return (1);
 964                                         }
 965                                         break;
 966                                 }
 967
 968 #endif
 969                         default:
 970                                 /* TSNH */
 971                                 break;
 972                         }
 973
 974                 }
 975         }
 976         SCTP_IPI_ADDR_RUNLOCK();
 977         return (0);
 978 }
 979
 980
 981 static struct sctp_tcb *
 982 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 983     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
 984 {
 985         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
 986         /*
 987          * If we support the TCP model, then we must now dig through to see
 988          * if we can find our endpoint in the list of tcp ep's.
 989          */
 990         uint16_t lport, rport;
 991         struct sctppcbhead *ephead;
 992         struct sctp_inpcb *inp;
 993         struct sctp_laddr *laddr;
 994         struct sctp_tcb *stcb;
 995         struct sctp_nets *net;
 996
 997         if ((to == NULL) || (from == NULL)) {
 998                 return (NULL);
 999         }
1000         switch (to->sa_family) {
1001 #ifdef INET
1002         case AF_INET:
1003                 if (from->sa_family == AF_INET) {
1004                         lport = ((struct sockaddr_in *)to)->sin_port;
1005                         rport = ((struct sockaddr_in *)from)->sin_port;
1006                 } else {
1007                         return (NULL);
1008                 }
1009                 break;
1010 #endif
1011 #ifdef INET6
1012         case AF_INET6:
1013                 if (from->sa_family == AF_INET6) {
1014                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
1015                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
1016                 } else {
1017                         return (NULL);
1018                 }
1019                 break;
1020 #endif
1021         default:
1022                 return (NULL);
1023         }
1024         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1025         /*
1026          * Ok now for each of the guys in this bucket we must look and see:
1027          * - Does the remote port match. - Does there single association's
1028          * addresses match this address (to). If so we update p_ep to point
1029          * to this ep and return the tcb from it.
1030          */
1031         LIST_FOREACH(inp, ephead, sctp_hash) {
1032                 SCTP_INP_RLOCK(inp);
1033                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1034                         SCTP_INP_RUNLOCK(inp);
1035                         continue;
1036                 }
1037                 if (lport != inp->sctp_lport) {
1038                         SCTP_INP_RUNLOCK(inp);
1039                         continue;
1040                 }
1041                 if (inp->def_vrf_id != vrf_id) {
1042                         SCTP_INP_RUNLOCK(inp);
1043                         continue;
1044                 }
1045                 /* check to see if the ep has one of the addresses */
1046                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1047                         /* We are NOT bound all, so look further */
1048                         int match = 0;
1049
1050                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1051
1052                                 if (laddr->ifa == NULL) {
1053                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
1054                                         continue;
1055                                 }
1056                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1057                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1058                                         continue;
1059                                 }
1060                                 if (laddr->ifa->address.sa.sa_family ==
1061                                     to->sa_family) {
1062                                         /* see if it matches */
1063 #ifdef INET
1064                                         if (from->sa_family == AF_INET) {
1065                                                 struct sockaddr_in *intf_addr,
1066                                                            *sin;
1067
1068                                                 intf_addr = &laddr->ifa->address.sin;
1069                                                 sin = (struct sockaddr_in *)to;
1070                                                 if (sin->sin_addr.s_addr ==
1071                                                     intf_addr->sin_addr.s_addr) {
1072                                                         match = 1;
1073                                                         break;
1074                                                 }
1075                                         }
1076 #endif
1077 #ifdef INET6
1078                                         if (from->sa_family == AF_INET6) {
1079                                                 struct sockaddr_in6 *intf_addr6;
1080                                                 struct sockaddr_in6 *sin6;
1081
1082                                                 sin6 = (struct sockaddr_in6 *)
1083                                                     to;
1084                                                 intf_addr6 = &laddr->ifa->address.sin6;
1085
1086                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1087                                                     intf_addr6)) {
1088                                                         match = 1;
1089                                                         break;
1090                                                 }
1091                                         }
1092 #endif
1093                                 }
1094                         }
1095                         if (match == 0) {
1096                                 /* This endpoint does not have this address */
1097                                 SCTP_INP_RUNLOCK(inp);
1098                                 continue;
1099                         }
1100                 }
1101                 /*
1102                  * Ok if we hit here the ep has the address, does it hold
1103                  * the tcb?
1104                  */
1105                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1106                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1107                 if (stcb == NULL) {
1108                         SCTP_INP_RUNLOCK(inp);
1109                         continue;
1110                 }
1111                 SCTP_TCB_LOCK(stcb);
1112                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1113                         SCTP_TCB_UNLOCK(stcb);
1114                         SCTP_INP_RUNLOCK(inp);
1115                         continue;
1116                 }
1117                 if (stcb->rport != rport) {
1118                         /* remote port does not match. */
1119                         SCTP_TCB_UNLOCK(stcb);
1120                         SCTP_INP_RUNLOCK(inp);
1121                         continue;
1122                 }
1123                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1124                         SCTP_TCB_UNLOCK(stcb);
1125                         SCTP_INP_RUNLOCK(inp);
1126                         continue;
1127                 }
1128                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1129                         SCTP_TCB_UNLOCK(stcb);
1130                         SCTP_INP_RUNLOCK(inp);
1131                         continue;
1132                 }
1133                 /* Does this TCB have a matching address? */
1134                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1135
1136                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1137                                 /* not the same family, can't be a match */
1138                                 continue;
1139                         }
1140                         switch (from->sa_family) {
1141 #ifdef INET
1142                         case AF_INET:
1143                                 {
1144                                         struct sockaddr_in *sin, *rsin;
1145
1146                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
1147                                         rsin = (struct sockaddr_in *)from;
1148                                         if (sin->sin_addr.s_addr ==
1149                                             rsin->sin_addr.s_addr) {
1150                                                 /* found it */
1151                                                 if (netp != NULL) {
1152                                                         *netp = net;
1153                                                 }
1154                                                 /*
1155                                                  * Update the endpoint
1156                                                  * pointer
1157                                                  */
1158                                                 *inp_p = inp;
1159                                                 SCTP_INP_RUNLOCK(inp);
1160                                                 return (stcb);
1161                                         }
1162                                         break;
1163                                 }
1164 #endif
1165 #ifdef INET6
1166                         case AF_INET6:
1167                                 {
1168                                         struct sockaddr_in6 *sin6, *rsin6;
1169
1170                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1171                                         rsin6 = (struct sockaddr_in6 *)from;
1172                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1173                                             rsin6)) {
1174                                                 /* found it */
1175                                                 if (netp != NULL) {
1176                                                         *netp = net;
1177                                                 }
1178                                                 /*
1179                                                  * Update the endpoint
1180                                                  * pointer
1181                                                  */
1182                                                 *inp_p = inp;
1183                                                 SCTP_INP_RUNLOCK(inp);
1184                                                 return (stcb);
1185                                         }
1186                                         break;
1187                                 }
1188 #endif
1189                         default:
1190                                 /* TSNH */
1191                                 break;
1192                         }
1193                 }
1194                 SCTP_TCB_UNLOCK(stcb);
1195                 SCTP_INP_RUNLOCK(inp);
1196         }
1197         return (NULL);
1198 }
1199
1200
1201 /*
1202  * rules for use
1203  *
1204  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1205  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1206  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1207  * NULL.
1208  */
1209
1210 struct sctp_tcb *
1211 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1212     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1213 {
1214         struct sctpasochead *head;
1215         struct sctp_inpcb *inp;
1216         struct sctp_tcb *stcb = NULL;
1217         struct sctp_nets *net;
1218         uint16_t rport;
1219
1220         inp = *inp_p;
1221         switch (remote->sa_family) {
1222 #ifdef INET
1223         case AF_INET:
1224                 rport = (((struct sockaddr_in *)remote)->sin_port);
1225                 break;
1226 #endif
1227 #ifdef INET6
1228         case AF_INET6:
1229                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1230                 break;
1231 #endif
1232         default:
1233                 return (NULL);
1234         }
1235         if (locked_tcb) {
1236                 /*
1237                  * UN-lock so we can do proper locking here this occurs when
1238                  * called from load_addresses_from_init.
1239                  */
1240                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1241                 SCTP_TCB_UNLOCK(locked_tcb);
1242         }
1243         SCTP_INP_INFO_RLOCK();
1244         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1245             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1246                 /*-
1247                  * Now either this guy is our listener or it's the
1248                  * connector. If it is the one that issued the connect, then
1249                  * it's only chance is to be the first TCB in the list. If
1250                  * it is the acceptor, then do the special_lookup to hash
1251                  * and find the real inp.
1252                  */
1253                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1254                         /* to is peer addr, from is my addr */
1255                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1256                             netp, inp->def_vrf_id);
1257                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1258                                 /* we have a locked tcb, lower refcount */
1259                                 SCTP_INP_DECR_REF(inp);
1260                         }
1261                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1262                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1263                                 SCTP_TCB_LOCK(locked_tcb);
1264                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1265                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1266                         }
1267                         SCTP_INP_INFO_RUNLOCK();
1268                         return (stcb);
1269                 } else {
1270                         SCTP_INP_WLOCK(inp);
1271                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1272                                 goto null_return;
1273                         }
1274                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1275                         if (stcb == NULL) {
1276                                 goto null_return;
1277                         }
1278                         SCTP_TCB_LOCK(stcb);
1279
1280                         if (stcb->rport != rport) {
1281                                 /* remote port does not match. */
1282                                 SCTP_TCB_UNLOCK(stcb);
1283                                 goto null_return;
1284                         }
1285                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1286                                 SCTP_TCB_UNLOCK(stcb);
1287                                 goto null_return;
1288                         }
1289                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1290                                 SCTP_TCB_UNLOCK(stcb);
1291                                 goto null_return;
1292                         }
1293                         /* now look at the list of remote addresses */
1294                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1295 #ifdef INVARIANTS
1296                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1297                                         panic("Corrupt net list");
1298                                 }
1299 #endif
1300                                 if (net->ro._l_addr.sa.sa_family !=
1301                                     remote->sa_family) {
1302                                         /* not the same family */
1303                                         continue;
1304                                 }
1305                                 switch (remote->sa_family) {
1306 #ifdef INET
1307                                 case AF_INET:
1308                                         {
1309                                                 struct sockaddr_in *sin,
1310                                                            *rsin;
1311
1312                                                 sin = (struct sockaddr_in *)
1313                                                     &net->ro._l_addr;
1314                                                 rsin = (struct sockaddr_in *)remote;
1315                                                 if (sin->sin_addr.s_addr ==
1316                                                     rsin->sin_addr.s_addr) {
1317                                                         /* found it */
1318                                                         if (netp != NULL) {
1319                                                                 *netp = net;
1320                                                         }
1321                                                         if (locked_tcb == NULL) {
1322                                                                 SCTP_INP_DECR_REF(inp);
1323                                                         } else if (locked_tcb != stcb) {
1324                                                                 SCTP_TCB_LOCK(locked_tcb);
1325                                                         }
1326                                                         if (locked_tcb) {
1327                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1328                                                         }
1329                                                         SCTP_INP_WUNLOCK(inp);
1330                                                         SCTP_INP_INFO_RUNLOCK();
1331                                                         return (stcb);
1332                                                 }
1333                                                 break;
1334                                         }
1335 #endif
1336 #ifdef INET6
1337                                 case AF_INET6:
1338                                         {
1339                                                 struct sockaddr_in6 *sin6,
1340                                                             *rsin6;
1341
1342                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1343                                                 rsin6 = (struct sockaddr_in6 *)remote;
1344                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1345                                                     rsin6)) {
1346                                                         /* found it */
1347                                                         if (netp != NULL) {
1348                                                                 *netp = net;
1349                                                         }
1350                                                         if (locked_tcb == NULL) {
1351                                                                 SCTP_INP_DECR_REF(inp);
1352                                                         } else if (locked_tcb != stcb) {
1353                                                                 SCTP_TCB_LOCK(locked_tcb);
1354                                                         }
1355                                                         if (locked_tcb) {
1356                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1357                                                         }
1358                                                         SCTP_INP_WUNLOCK(inp);
1359                                                         SCTP_INP_INFO_RUNLOCK();
1360                                                         return (stcb);
1361                                                 }
1362                                                 break;
1363                                         }
1364 #endif
1365                                 default:
1366                                         /* TSNH */
1367                                         break;
1368                                 }
1369                         }
1370                         SCTP_TCB_UNLOCK(stcb);
1371                 }
1372         } else {
1373                 SCTP_INP_WLOCK(inp);
1374                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1375                         goto null_return;
1376                 }
1377                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1378                     inp->sctp_hashmark)];
1379                 if (head == NULL) {
1380                         goto null_return;
1381                 }
1382                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1383                         if (stcb->rport != rport) {
1384                                 /* remote port does not match */
1385                                 continue;
1386                         }
1387                         SCTP_TCB_LOCK(stcb);
1388                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1389                                 SCTP_TCB_UNLOCK(stcb);
1390                                 continue;
1391                         }
1392                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1393                                 SCTP_TCB_UNLOCK(stcb);
1394                                 continue;
1395                         }
1396                         /* now look at the list of remote addresses */
1397                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1398 #ifdef INVARIANTS
1399                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1400                                         panic("Corrupt net list");
1401                                 }
1402 #endif
1403                                 if (net->ro._l_addr.sa.sa_family !=
1404                                     remote->sa_family) {
1405                                         /* not the same family */
1406                                         continue;
1407                                 }
1408                                 switch (remote->sa_family) {
1409 #ifdef INET
1410                                 case AF_INET:
1411                                         {
1412                                                 struct sockaddr_in *sin,
1413                                                            *rsin;
1414
1415                                                 sin = (struct sockaddr_in *)
1416                                                     &net->ro._l_addr;
1417                                                 rsin = (struct sockaddr_in *)remote;
1418                                                 if (sin->sin_addr.s_addr ==
1419                                                     rsin->sin_addr.s_addr) {
1420                                                         /* found it */
1421                                                         if (netp != NULL) {
1422                                                                 *netp = net;
1423                                                         }
1424                                                         if (locked_tcb == NULL) {
1425                                                                 SCTP_INP_DECR_REF(inp);
1426                                                         } else if (locked_tcb != stcb) {
1427                                                                 SCTP_TCB_LOCK(locked_tcb);
1428                                                         }
1429                                                         if (locked_tcb) {
1430                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1431                                                         }
1432                                                         SCTP_INP_WUNLOCK(inp);
1433                                                         SCTP_INP_INFO_RUNLOCK();
1434                                                         return (stcb);
1435                                                 }
1436                                                 break;
1437                                         }
1438 #endif
1439 #ifdef INET6
1440                                 case AF_INET6:
1441                                         {
1442                                                 struct sockaddr_in6 *sin6,
1443                                                             *rsin6;
1444
1445                                                 sin6 = (struct sockaddr_in6 *)
1446                                                     &net->ro._l_addr;
1447                                                 rsin6 = (struct sockaddr_in6 *)remote;
1448                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1449                                                     rsin6)) {
1450                                                         /* found it */
1451                                                         if (netp != NULL) {
1452                                                                 *netp = net;
1453                                                         }
1454                                                         if (locked_tcb == NULL) {
1455                                                                 SCTP_INP_DECR_REF(inp);
1456                                                         } else if (locked_tcb != stcb) {
1457                                                                 SCTP_TCB_LOCK(locked_tcb);
1458                                                         }
1459                                                         if (locked_tcb) {
1460                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1461                                                         }
1462                                                         SCTP_INP_WUNLOCK(inp);
1463                                                         SCTP_INP_INFO_RUNLOCK();
1464                                                         return (stcb);
1465                                                 }
1466                                                 break;
1467                                         }
1468 #endif
1469                                 default:
1470                                         /* TSNH */
1471                                         break;
1472                                 }
1473                         }
1474                         SCTP_TCB_UNLOCK(stcb);
1475                 }
1476         }
1477 null_return:
1478         /* clean up for returning null */
1479         if (locked_tcb) {
1480                 SCTP_TCB_LOCK(locked_tcb);
1481                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1482         }
1483         SCTP_INP_WUNLOCK(inp);
1484         SCTP_INP_INFO_RUNLOCK();
1485         /* not found */
1486         return (NULL);
1487 }
1488
1489
1490 /*
1491  * Find an association for a specific endpoint using the association id given
1492  * out in the COMM_UP notification
1493  */
1494 struct sctp_tcb *
1495 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1496 {
1497         /*
1498          * Use my the assoc_id to find a endpoint
1499          */
1500         struct sctpasochead *head;
1501         struct sctp_tcb *stcb;
1502         uint32_t id;
1503
1504         if (inp == NULL) {
1505                 SCTP_PRINTF("TSNH ep_associd\n");
1506                 return (NULL);
1507         }
1508         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1509                 SCTP_PRINTF("TSNH ep_associd0\n");
1510                 return (NULL);
1511         }
1512         id = (uint32_t) asoc_id;
1513         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1514         if (head == NULL) {
1515                 /* invalid id TSNH */
1516                 SCTP_PRINTF("TSNH ep_associd1\n");
1517                 return (NULL);
1518         }
1519         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1520                 if (stcb->asoc.assoc_id == id) {
1521                         if (inp != stcb->sctp_ep) {
1522                                 /*
1523                                  * some other guy has the same id active (id
1524                                  * collision ??).
1525                                  */
1526                                 SCTP_PRINTF("TSNH ep_associd2\n");
1527                                 continue;
1528                         }
1529                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1530                                 continue;
1531                         }
1532                         if (want_lock) {
1533                                 SCTP_TCB_LOCK(stcb);
1534                         }
1535                         return (stcb);
1536                 }
1537         }
1538         return (NULL);
1539 }
1540
1541
1542 struct sctp_tcb *
1543 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1544 {
1545         struct sctp_tcb *stcb;
1546
1547         SCTP_INP_RLOCK(inp);
1548         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1549         SCTP_INP_RUNLOCK(inp);
1550         return (stcb);
1551 }
1552
1553
1554 /*
1555  * Endpoint probe expects that the INP_INFO is locked.
1556  */
1557 static struct sctp_inpcb *
1558 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1559     uint16_t lport, uint32_t vrf_id)
1560 {
1561         struct sctp_inpcb *inp;
1562         struct sctp_laddr *laddr;
1563
1564 #ifdef INET
1565         struct sockaddr_in *sin;
1566
1567 #endif
1568 #ifdef INET6
1569         struct sockaddr_in6 *sin6;
1570         struct sockaddr_in6 *intf_addr6;
1571
1572 #endif
1573         int fnd;
1574
1575 #ifdef INET
1576         sin = NULL;
1577 #endif
1578 #ifdef INET6
1579         sin6 = NULL;
1580 #endif
1581         switch (nam->sa_family) {
1582 #ifdef INET
1583         case AF_INET:
1584                 sin = (struct sockaddr_in *)nam;
1585                 break;
1586 #endif
1587 #ifdef INET6
1588         case AF_INET6:
1589                 sin6 = (struct sockaddr_in6 *)nam;
1590                 break;
1591 #endif
1592         default:
1593                 /* unsupported family */
1594                 return (NULL);
1595         }
1596
1597         if (head == NULL)
1598                 return (NULL);
1599
1600         LIST_FOREACH(inp, head, sctp_hash) {
1601                 SCTP_INP_RLOCK(inp);
1602                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1603                         SCTP_INP_RUNLOCK(inp);
1604                         continue;
1605                 }
1606                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1607                     (inp->sctp_lport == lport)) {
1608                         /* got it */
1609 #ifdef INET
1610                         if ((nam->sa_family == AF_INET) &&
1611                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1612                             SCTP_IPV6_V6ONLY(inp)) {
1613                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1614                                 SCTP_INP_RUNLOCK(inp);
1615                                 continue;
1616                         }
1617 #endif
1618 #ifdef INET6
1619                         /* A V6 address and the endpoint is NOT bound V6 */
1620                         if (nam->sa_family == AF_INET6 &&
1621                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1622                                 SCTP_INP_RUNLOCK(inp);
1623                                 continue;
1624                         }
1625 #endif
1626                         /* does a VRF id match? */
1627                         fnd = 0;
1628                         if (inp->def_vrf_id == vrf_id)
1629                                 fnd = 1;
1630
1631                         SCTP_INP_RUNLOCK(inp);
1632                         if (!fnd)
1633                                 continue;
1634                         return (inp);
1635                 }
1636                 SCTP_INP_RUNLOCK(inp);
1637         }
1638         switch (nam->sa_family) {
1639 #ifdef INET
1640         case AF_INET:
1641                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1642                         /* Can't hunt for one that has no address specified */
1643                         return (NULL);
1644                 }
1645                 break;
1646 #endif
1647 #ifdef INET6
1648         case AF_INET6:
1649                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1650                         /* Can't hunt for one that has no address specified */
1651                         return (NULL);
1652                 }
1653                 break;
1654 #endif
1655         default:
1656                 break;
1657         }
1658         /*
1659          * ok, not bound to all so see if we can find a EP bound to this
1660          * address.
1661          */
1662         LIST_FOREACH(inp, head, sctp_hash) {
1663                 SCTP_INP_RLOCK(inp);
1664                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1665                         SCTP_INP_RUNLOCK(inp);
1666                         continue;
1667                 }
1668                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1669                         SCTP_INP_RUNLOCK(inp);
1670                         continue;
1671                 }
1672                 /*
1673                  * Ok this could be a likely candidate, look at all of its
1674                  * addresses
1675                  */
1676                 if (inp->sctp_lport != lport) {
1677                         SCTP_INP_RUNLOCK(inp);
1678                         continue;
1679                 }
1680                 /* does a VRF id match? */
1681                 fnd = 0;
1682                 if (inp->def_vrf_id == vrf_id)
1683                         fnd = 1;
1684
1685                 if (!fnd) {
1686                         SCTP_INP_RUNLOCK(inp);
1687                         continue;
1688                 }
1689                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1690                         if (laddr->ifa == NULL) {
1691                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1692                                     __FUNCTION__);
1693                                 continue;
1694                         }
1695                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1696                             (void *)laddr->ifa);
1697                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1698                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1699                                 continue;
1700                         }
1701                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1702                                 /* possible, see if it matches */
1703                                 switch (nam->sa_family) {
1704 #ifdef INET
1705                                 case AF_INET:
1706                                         if (sin->sin_addr.s_addr ==
1707                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1708                                                 SCTP_INP_RUNLOCK(inp);
1709                                                 return (inp);
1710                                         }
1711                                         break;
1712 #endif
1713 #ifdef INET6
1714                                 case AF_INET6:
1715                                         intf_addr6 = &laddr->ifa->address.sin6;
1716                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1717                                             intf_addr6)) {
1718                                                 SCTP_INP_RUNLOCK(inp);
1719                                                 return (inp);
1720                                         }
1721                                         break;
1722 #endif
1723                                 }
1724                         }
1725                 }
1726                 SCTP_INP_RUNLOCK(inp);
1727         }
1728         return (NULL);
1729 }
1730
1731
1732 static struct sctp_inpcb *
1733 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1734 {
1735         struct sctppcbhead *head;
1736         struct sctp_inpcb *t_inp;
1737         int fnd;
1738
1739         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1740             SCTP_BASE_INFO(hashmark))];
1741         LIST_FOREACH(t_inp, head, sctp_hash) {
1742                 if (t_inp->sctp_lport != lport) {
1743                         continue;
1744                 }
1745                 /* is it in the VRF in question */
1746                 fnd = 0;
1747                 if (t_inp->def_vrf_id == vrf_id)
1748                         fnd = 1;
1749                 if (!fnd)
1750                         continue;
1751
1752                 /* This one is in use. */
1753                 /* check the v6/v4 binding issue */
1754                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1755                     SCTP_IPV6_V6ONLY(t_inp)) {
1756                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1757                                 /* collision in V6 space */
1758                                 return (t_inp);
1759                         } else {
1760                                 /* inp is BOUND_V4 no conflict */
1761                                 continue;
1762                         }
1763                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1764                         /* t_inp is bound v4 and v6, conflict always */
1765                         return (t_inp);
1766                 } else {
1767                         /* t_inp is bound only V4 */
1768                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1769                             SCTP_IPV6_V6ONLY(inp)) {
1770                                 /* no conflict */
1771                                 continue;
1772                         }
1773                         /* else fall through to conflict */
1774                 }
1775                 return (t_inp);
1776         }
1777         return (NULL);
1778 }
1779
1780
1781 int
1782 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1783 {
1784         /* For 1-2-1 with port reuse */
1785         struct sctppcbhead *head;
1786         struct sctp_inpcb *tinp;
1787
1788         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1789                 /* only works with port reuse on */
1790                 return (-1);
1791         }
1792         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1793                 return (0);
1794         }
1795         SCTP_INP_RUNLOCK(inp);
1796         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1797             SCTP_BASE_INFO(hashmark))];
1798         /* Kick out all non-listeners to the TCP hash */
1799         LIST_FOREACH(tinp, head, sctp_hash) {
1800                 if (tinp->sctp_lport != inp->sctp_lport) {
1801                         continue;
1802                 }
1803                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1804                         continue;
1805                 }
1806                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1807                         continue;
1808                 }
1809                 if (tinp->sctp_socket->so_qlimit) {
1810                         continue;
1811                 }
1812                 SCTP_INP_WLOCK(tinp);
1813                 LIST_REMOVE(tinp, sctp_hash);
1814                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1815                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1816                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1817                 SCTP_INP_WUNLOCK(tinp);
1818         }
1819         SCTP_INP_WLOCK(inp);
1820         /* Pull from where he was */
1821         LIST_REMOVE(inp, sctp_hash);
1822         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1823         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1824         LIST_INSERT_HEAD(head, inp, sctp_hash);
1825         SCTP_INP_WUNLOCK(inp);
1826         SCTP_INP_RLOCK(inp);
1827         return (0);
1828 }
1829
1830
1831 struct sctp_inpcb *
1832 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1833     uint32_t vrf_id)
1834 {
1835         /*
1836          * First we check the hash table to see if someone has this port
1837          * bound with just the port.
1838          */
1839         struct sctp_inpcb *inp;
1840         struct sctppcbhead *head;
1841         int lport;
1842         unsigned int i;
1843
1844 #ifdef INET
1845         struct sockaddr_in *sin;
1846
1847 #endif
1848 #ifdef INET6
1849         struct sockaddr_in6 *sin6;
1850
1851 #endif
1852
1853         switch (nam->sa_family) {
1854 #ifdef INET
1855         case AF_INET:
1856                 sin = (struct sockaddr_in *)nam;
1857                 lport = sin->sin_port;
1858                 break;
1859 #endif
1860 #ifdef INET6
1861         case AF_INET6:
1862                 sin6 = (struct sockaddr_in6 *)nam;
1863                 lport = sin6->sin6_port;
1864                 break;
1865 #endif
1866         default:
1867                 return (NULL);
1868         }
1869         /*
1870          * I could cheat here and just cast to one of the types but we will
1871          * do it right. It also provides the check against an Unsupported
1872          * type too.
1873          */
1874         /* Find the head of the ALLADDR chain */
1875         if (have_lock == 0) {
1876                 SCTP_INP_INFO_RLOCK();
1877         }
1878         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1879             SCTP_BASE_INFO(hashmark))];
1880         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1881
1882         /*
1883          * If the TCP model exists it could be that the main listening
1884          * endpoint is gone but there still exists a connected socket for
1885          * this guy. If so we can return the first one that we find. This
1886          * may NOT be the correct one so the caller should be wary on the
1887          * returned INP. Currently the only caller that sets find_tcp_pool
1888          * is in bindx where we are verifying that a user CAN bind the
1889          * address. He either has bound it already, or someone else has, or
1890          * its open to bind, so this is good enough.
1891          */
1892         if (inp == NULL && find_tcp_pool) {
1893                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1894                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1895                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1896                         if (inp) {
1897                                 break;
1898                         }
1899                 }
1900         }
1901         if (inp) {
1902                 SCTP_INP_INCR_REF(inp);
1903         }
1904         if (have_lock == 0) {
1905                 SCTP_INP_INFO_RUNLOCK();
1906         }
1907         return (inp);
1908 }
1909
1910
1911 /*
1912  * Find an association for an endpoint with the pointer to whom you want to
1913  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1914  * need to change the *to to some other struct like a mbuf...
1915  */
1916 struct sctp_tcb *
1917 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
1918     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1919     uint32_t vrf_id)
1920 {
1921         struct sctp_inpcb *inp = NULL;
1922         struct sctp_tcb *stcb;
1923
1924         SCTP_INP_INFO_RLOCK();
1925         if (find_tcp_pool) {
1926                 if (inp_p != NULL) {
1927                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
1928                             vrf_id);
1929                 } else {
1930                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
1931                             vrf_id);
1932                 }
1933                 if (stcb != NULL) {
1934                         SCTP_INP_INFO_RUNLOCK();
1935                         return (stcb);
1936                 }
1937         }
1938         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1939         if (inp_p != NULL) {
1940                 *inp_p = inp;
1941         }
1942         SCTP_INP_INFO_RUNLOCK();
1943         if (inp == NULL) {
1944                 return (NULL);
1945         }
1946         /*
1947          * ok, we have an endpoint, now lets find the assoc for it (if any)
1948          * we now place the source address or from in the to of the find
1949          * endpoint call. Since in reality this chain is used from the
1950          * inbound packet side.
1951          */
1952         if (inp_p != NULL) {
1953                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1954                     NULL);
1955         } else {
1956                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
1957                     NULL);
1958         }
1959         return (stcb);
1960 }
1961
1962
1963 /*
1964  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1965  * find all addresses that the sender has specified in any address list. Each
1966  * address will be used to lookup the TCB and see if one exits.
1967  */
1968 static struct sctp_tcb *
1969 sctp_findassociation_special_addr(struct mbuf *m, int offset,
1970     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1971     struct sockaddr *dst)
1972 {
1973         struct sctp_paramhdr *phdr, parm_buf;
1974         struct sctp_tcb *stcb;
1975         uint32_t ptype, plen;
1976
1977 #ifdef INET
1978         struct sockaddr_in sin4;
1979
1980 #endif
1981 #ifdef INET6
1982         struct sockaddr_in6 sin6;
1983
1984 #endif
1985
1986 #ifdef INET
1987         memset(&sin4, 0, sizeof(sin4));
1988         sin4.sin_len = sizeof(sin4);
1989         sin4.sin_family = AF_INET;
1990         sin4.sin_port = sh->src_port;
1991 #endif
1992 #ifdef INET6
1993         memset(&sin6, 0, sizeof(sin6));
1994         sin6.sin6_len = sizeof(sin6);
1995         sin6.sin6_family = AF_INET6;
1996         sin6.sin6_port = sh->src_port;
1997 #endif
1998
1999         stcb = NULL;
2000         offset += sizeof(struct sctp_init_chunk);
2001
2002         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
2003         while (phdr != NULL) {
2004                 /* now we must see if we want the parameter */
2005                 ptype = ntohs(phdr->param_type);
2006                 plen = ntohs(phdr->param_length);
2007                 if (plen == 0) {
2008                         break;
2009                 }
2010 #ifdef INET
2011                 if (ptype == SCTP_IPV4_ADDRESS &&
2012                     plen == sizeof(struct sctp_ipv4addr_param)) {
2013                         /* Get the rest of the address */
2014                         struct sctp_ipv4addr_param ip4_parm, *p4;
2015
2016                         phdr = sctp_get_next_param(m, offset,
2017                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2018                         if (phdr == NULL) {
2019                                 return (NULL);
2020                         }
2021                         p4 = (struct sctp_ipv4addr_param *)phdr;
2022                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2023                         /* look it up */
2024                         stcb = sctp_findassociation_ep_addr(inp_p,
2025                             (struct sockaddr *)&sin4, netp, dst, NULL);
2026                         if (stcb != NULL) {
2027                                 return (stcb);
2028                         }
2029                 }
2030 #endif
2031 #ifdef INET6
2032                 if (ptype == SCTP_IPV6_ADDRESS &&
2033                     plen == sizeof(struct sctp_ipv6addr_param)) {
2034                         /* Get the rest of the address */
2035                         struct sctp_ipv6addr_param ip6_parm, *p6;
2036
2037                         phdr = sctp_get_next_param(m, offset,
2038                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
2039                         if (phdr == NULL) {
2040                                 return (NULL);
2041                         }
2042                         p6 = (struct sctp_ipv6addr_param *)phdr;
2043                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2044                         /* look it up */
2045                         stcb = sctp_findassociation_ep_addr(inp_p,
2046                             (struct sockaddr *)&sin6, netp, dst, NULL);
2047                         if (stcb != NULL) {
2048                                 return (stcb);
2049                         }
2050                 }
2051 #endif
2052                 offset += SCTP_SIZE32(plen);
2053                 phdr = sctp_get_next_param(m, offset, &parm_buf,
2054                     sizeof(parm_buf));
2055         }
2056         return (NULL);
2057 }
2058
2059 static struct sctp_tcb *
2060 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2061     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2062     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2063 {
2064         /*
2065          * Use my vtag to hash. If we find it we then verify the source addr
2066          * is in the assoc. If all goes well we save a bit on rec of a
2067          * packet.
2068          */
2069         struct sctpasochead *head;
2070         struct sctp_nets *net;
2071         struct sctp_tcb *stcb;
2072
2073         SCTP_INP_INFO_RLOCK();
2074         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2075             SCTP_BASE_INFO(hashasocmark))];
2076         if (head == NULL) {
2077                 /* invalid vtag */
2078                 SCTP_INP_INFO_RUNLOCK();
2079                 return (NULL);
2080         }
2081         LIST_FOREACH(stcb, head, sctp_asocs) {
2082                 SCTP_INP_RLOCK(stcb->sctp_ep);
2083                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2084                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2085                         continue;
2086                 }
2087                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2088                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2089                         continue;
2090                 }
2091                 SCTP_TCB_LOCK(stcb);
2092                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2093                 if (stcb->asoc.my_vtag == vtag) {
2094                         /* candidate */
2095                         if (stcb->rport != rport) {
2096                                 SCTP_TCB_UNLOCK(stcb);
2097                                 continue;
2098                         }
2099                         if (stcb->sctp_ep->sctp_lport != lport) {
2100                                 SCTP_TCB_UNLOCK(stcb);
2101                                 continue;
2102                         }
2103                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2104                                 SCTP_TCB_UNLOCK(stcb);
2105                                 continue;
2106                         }
2107                         /* RRS:Need toaddr check here */
2108                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2109                                 /* Endpoint does not own this address */
2110                                 SCTP_TCB_UNLOCK(stcb);
2111                                 continue;
2112                         }
2113                         if (remote_tag) {
2114                                 /*
2115                                  * If we have both vtags that's all we match
2116                                  * on
2117                                  */
2118                                 if (stcb->asoc.peer_vtag == remote_tag) {
2119                                         /*
2120                                          * If both tags match we consider it
2121                                          * conclusive and check NO
2122                                          * source/destination addresses
2123                                          */
2124                                         goto conclusive;
2125                                 }
2126                         }
2127                         if (skip_src_check) {
2128                 conclusive:
2129                                 if (from) {
2130                                         *netp = sctp_findnet(stcb, from);
2131                                 } else {
2132                                         *netp = NULL;   /* unknown */
2133                                 }
2134                                 if (inp_p)
2135                                         *inp_p = stcb->sctp_ep;
2136                                 SCTP_INP_INFO_RUNLOCK();
2137                                 return (stcb);
2138                         }
2139                         net = sctp_findnet(stcb, from);
2140                         if (net) {
2141                                 /* yep its him. */
2142                                 *netp = net;
2143                                 SCTP_STAT_INCR(sctps_vtagexpress);
2144                                 *inp_p = stcb->sctp_ep;
2145                                 SCTP_INP_INFO_RUNLOCK();
2146                                 return (stcb);
2147                         } else {
2148                                 /*
2149                                  * not him, this should only happen in rare
2150                                  * cases so I peg it.
2151                                  */
2152                                 SCTP_STAT_INCR(sctps_vtagbogus);
2153                         }
2154                 }
2155                 SCTP_TCB_UNLOCK(stcb);
2156         }
2157         SCTP_INP_INFO_RUNLOCK();
2158         return (NULL);
2159 }
2160
2161
2162 /*
2163  * Find an association with the pointer to the inbound IP packet. This can be
2164  * a IPv4 or IPv6 packet.
2165  */
2166 struct sctp_tcb *
2167 sctp_findassociation_addr(struct mbuf *m, int offset,
2168     struct sockaddr *src, struct sockaddr *dst,
2169     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2170     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2171 {
2172         int find_tcp_pool;
2173         struct sctp_tcb *stcb;
2174         struct sctp_inpcb *inp;
2175
2176         if (sh->v_tag) {
2177                 /* we only go down this path if vtag is non-zero */
2178                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2179                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2180                 if (stcb) {
2181                         return (stcb);
2182                 }
2183         }
2184         find_tcp_pool = 0;
2185         if ((ch->chunk_type != SCTP_INITIATION) &&
2186             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2187             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2188             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2189                 /* Other chunk types go to the tcp pool. */
2190                 find_tcp_pool = 1;
2191         }
2192         if (inp_p) {
2193                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2194                     find_tcp_pool, vrf_id);
2195                 inp = *inp_p;
2196         } else {
2197                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2198                     find_tcp_pool, vrf_id);
2199         }
2200         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2201         if (stcb == NULL && inp) {
2202                 /* Found a EP but not this address */
2203                 if ((ch->chunk_type == SCTP_INITIATION) ||
2204                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2205                         /*-
2206                          * special hook, we do NOT return linp or an
2207                          * association that is linked to an existing
2208                          * association that is under the TCP pool (i.e. no
2209                          * listener exists). The endpoint finding routine
2210                          * will always find a listener before examining the
2211                          * TCP pool.
2212                          */
2213                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2214                                 if (inp_p) {
2215                                         *inp_p = NULL;
2216                                 }
2217                                 return (NULL);
2218                         }
2219                         stcb = sctp_findassociation_special_addr(m,
2220                             offset, sh, &inp, netp, dst);
2221                         if (inp_p != NULL) {
2222                                 *inp_p = inp;
2223                         }
2224                 }
2225         }
2226         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2227         return (stcb);
2228 }
2229
2230 /*
2231  * lookup an association by an ASCONF lookup address.
2232  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2233  */
2234 struct sctp_tcb *
2235 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2236     struct sockaddr *dst, struct sctphdr *sh,
2237     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2238 {
2239         struct sctp_tcb *stcb;
2240         struct sockaddr_storage remote_store;
2241         struct sctp_paramhdr parm_buf, *phdr;
2242         int ptype;
2243         int zero_address = 0;
2244
2245 #ifdef INET
2246         struct sockaddr_in *sin;
2247
2248 #endif
2249 #ifdef INET6
2250         struct sockaddr_in6 *sin6;
2251
2252 #endif
2253
2254         memset(&remote_store, 0, sizeof(remote_store));
2255         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2256             &parm_buf, sizeof(struct sctp_paramhdr));
2257         if (phdr == NULL) {
2258                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2259                     __FUNCTION__);
2260                 return NULL;
2261         }
2262         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2263         /* get the correlation address */
2264         switch (ptype) {
2265 #ifdef INET6
2266         case SCTP_IPV6_ADDRESS:
2267                 {
2268                         /* ipv6 address param */
2269                         struct sctp_ipv6addr_param *p6, p6_buf;
2270
2271                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2272                                 return NULL;
2273                         }
2274                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2275                             offset + sizeof(struct sctp_asconf_chunk),
2276                             &p6_buf.ph, sizeof(*p6));
2277                         if (p6 == NULL) {
2278                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2279                                     __FUNCTION__);
2280                                 return (NULL);
2281                         }
2282                         sin6 = (struct sockaddr_in6 *)&remote_store;
2283                         sin6->sin6_family = AF_INET6;
2284                         sin6->sin6_len = sizeof(*sin6);
2285                         sin6->sin6_port = sh->src_port;
2286                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2287                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2288                                 zero_address = 1;
2289                         break;
2290                 }
2291 #endif
2292 #ifdef INET
2293         case SCTP_IPV4_ADDRESS:
2294                 {
2295                         /* ipv4 address param */
2296                         struct sctp_ipv4addr_param *p4, p4_buf;
2297
2298                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2299                                 return NULL;
2300                         }
2301                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2302                             offset + sizeof(struct sctp_asconf_chunk),
2303                             &p4_buf.ph, sizeof(*p4));
2304                         if (p4 == NULL) {
2305                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2306                                     __FUNCTION__);
2307                                 return (NULL);
2308                         }
2309                         sin = (struct sockaddr_in *)&remote_store;
2310                         sin->sin_family = AF_INET;
2311                         sin->sin_len = sizeof(*sin);
2312                         sin->sin_port = sh->src_port;
2313                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2314                         if (sin->sin_addr.s_addr == INADDR_ANY)
2315                                 zero_address = 1;
2316                         break;
2317                 }
2318 #endif
2319         default:
2320                 /* invalid address param type */
2321                 return NULL;
2322         }
2323
2324         if (zero_address) {
2325                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2326                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2327                 if (stcb != NULL) {
2328                         SCTP_INP_DECR_REF(*inp_p);
2329                 }
2330         } else {
2331                 stcb = sctp_findassociation_ep_addr(inp_p,
2332                     (struct sockaddr *)&remote_store, netp,
2333                     dst, NULL);
2334         }
2335         return (stcb);
2336 }
2337
2338
2339 /*
2340  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2341  * addresses. This way if we don't get a bind we by default pick a ephemeral
2342  * port with all addresses bound.
2343  */
2344 int
2345 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2346 {
2347         /*
2348          * we get called when a new endpoint starts up. We need to allocate
2349          * the sctp_inpcb structure from the zone and init it. Mark it as
2350          * unbound and find a port that we can use as an ephemeral with
2351          * INADDR_ANY. If the user binds later no problem we can then add in
2352          * the specific addresses. And setup the default parameters for the
2353          * EP.
2354          */
2355         int i, error;
2356         struct sctp_inpcb *inp;
2357         struct sctp_pcb *m;
2358         struct timeval time;
2359         sctp_sharedkey_t *null_key;
2360
2361         error = 0;
2362
2363         SCTP_INP_INFO_WLOCK();
2364         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2365         if (inp == NULL) {
2366                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2367                 SCTP_INP_INFO_WUNLOCK();
2368                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2369                 return (ENOBUFS);
2370         }
2371         /* zap it */
2372         bzero(inp, sizeof(*inp));
2373
2374         /* bump generations */
2375         /* setup socket pointers */
2376         inp->sctp_socket = so;
2377         inp->ip_inp.inp.inp_socket = so;
2378 #ifdef INET6
2379         if (INP_SOCKAF(so) == AF_INET6) {
2380                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2381                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2382                 }
2383                 if (MODULE_GLOBAL(ip6_v6only)) {
2384                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2385                 }
2386         }
2387 #endif
2388         inp->sctp_associd_counter = 1;
2389         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2390         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2391         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2392         inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable);
2393         /* init the small hash table we use to track asocid <-> tcb */
2394         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2395         if (inp->sctp_asocidhash == NULL) {
2396                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2397                 SCTP_INP_INFO_WUNLOCK();
2398                 return (ENOBUFS);
2399         }
2400 #ifdef IPSEC
2401         {
2402                 struct inpcbpolicy *pcb_sp = NULL;
2403
2404                 error = ipsec_init_policy(so, &pcb_sp);
2405                 /* Arrange to share the policy */
2406                 inp->ip_inp.inp.inp_sp = pcb_sp;
2407                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2408         }
2409         if (error != 0) {
2410                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2411                 SCTP_INP_INFO_WUNLOCK();
2412                 return error;
2413         }
2414 #endif                          /* IPSEC */
2415         SCTP_INCR_EP_COUNT();
2416         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2417         SCTP_INP_INFO_WUNLOCK();
2418
2419         so->so_pcb = (caddr_t)inp;
2420
2421         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2422                 /* UDP style socket */
2423                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2424                     SCTP_PCB_FLAGS_UNBOUND);
2425                 /* Be sure it is NON-BLOCKING IO for UDP */
2426                 /* SCTP_SET_SO_NBIO(so); */
2427         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2428                 /* TCP style socket */
2429                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2430                     SCTP_PCB_FLAGS_UNBOUND);
2431                 /* Be sure we have blocking IO by default */
2432                 SCTP_CLEAR_SO_NBIO(so);
2433         } else {
2434                 /*
2435                  * unsupported socket type (RAW, etc)- in case we missed it
2436                  * in protosw
2437                  */
2438                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2439                 so->so_pcb = NULL;
2440                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2441                 return (EOPNOTSUPP);
2442         }
2443         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2444                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2445                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2446         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2447                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2448                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2449         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2450                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2451                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2452         }
2453         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2454             &inp->sctp_hashmark);
2455         if (inp->sctp_tcbhash == NULL) {
2456                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2457                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2458                 so->so_pcb = NULL;
2459                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2460                 return (ENOBUFS);
2461         }
2462         inp->def_vrf_id = vrf_id;
2463
2464         SCTP_INP_INFO_WLOCK();
2465         SCTP_INP_LOCK_INIT(inp);
2466         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2467         SCTP_INP_READ_INIT(inp);
2468         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2469         /* lock the new ep */
2470         SCTP_INP_WLOCK(inp);
2471
2472         /* add it to the info area */
2473         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2474         SCTP_INP_INFO_WUNLOCK();
2475
2476         TAILQ_INIT(&inp->read_queue);
2477         LIST_INIT(&inp->sctp_addr_list);
2478
2479         LIST_INIT(&inp->sctp_asoc_list);
2480
2481 #ifdef SCTP_TRACK_FREED_ASOCS
2482         /* TEMP CODE */
2483         LIST_INIT(&inp->sctp_asoc_free_list);
2484 #endif
2485         /* Init the timer structure for signature change */
2486         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2487         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2488
2489         /* now init the actual endpoint default data */
2490         m = &inp->sctp_ep;
2491
2492         /* setup the base timeout information */
2493         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2494         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2495         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2496         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2497         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2498         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2499         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2500         /* all max/min max are in ms */
2501         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2502         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2503         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2504         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2505         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2506
2507         m->max_open_streams_intome = MAX_SCTP_STREAMS;
2508
2509         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2510         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2511         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2512         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2513         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2514         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2515         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2516         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2517
2518         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2519         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2520         /* number of streams to pre-open on a association */
2521         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2522
2523         /* Add adaptation cookie */
2524         m->adaptation_layer_indicator = 0;
2525         m->adaptation_layer_indicator_provided = 0;
2526
2527         /* seed random number generator */
2528         m->random_counter = 1;
2529         m->store_at = SCTP_SIGNATURE_SIZE;
2530         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2531         sctp_fill_random_store(m);
2532
2533         /* Minimum cookie size */
2534         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2535             sizeof(struct sctp_state_cookie);
2536         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2537
2538         /* Setup the initial secret */
2539         (void)SCTP_GETTIME_TIMEVAL(&time);
2540         m->time_of_secret_change = time.tv_sec;
2541
2542         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2543                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2544         }
2545         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2546
2547         /* How long is a cookie good for ? */
2548         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2549         /*
2550          * Initialize authentication parameters
2551          */
2552         m->local_hmacs = sctp_default_supported_hmaclist();
2553         m->local_auth_chunks = sctp_alloc_chunklist();
2554         m->default_dscp = 0;
2555 #ifdef INET6
2556         m->default_flowlabel = 0;
2557 #endif
2558         m->port = 0;            /* encapsulation disabled by default */
2559         sctp_auth_set_default_chunks(m->local_auth_chunks);
2560         LIST_INIT(&m->shared_keys);
2561         /* add default NULL key as key id 0 */
2562         null_key = sctp_alloc_sharedkey();
2563         sctp_insert_sharedkey(&m->shared_keys, null_key);
2564         SCTP_INP_WUNLOCK(inp);
2565 #ifdef SCTP_LOG_CLOSING
2566         sctp_log_closing(inp, NULL, 12);
2567 #endif
2568         return (error);
2569 }
2570
2571
2572 void
2573 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2574     struct sctp_tcb *stcb)
2575 {
2576         struct sctp_nets *net;
2577         uint16_t lport, rport;
2578         struct sctppcbhead *head;
2579         struct sctp_laddr *laddr, *oladdr;
2580
2581         atomic_add_int(&stcb->asoc.refcnt, 1);
2582         SCTP_TCB_UNLOCK(stcb);
2583         SCTP_INP_INFO_WLOCK();
2584         SCTP_INP_WLOCK(old_inp);
2585         SCTP_INP_WLOCK(new_inp);
2586         SCTP_TCB_LOCK(stcb);
2587         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2588
2589         new_inp->sctp_ep.time_of_secret_change =
2590             old_inp->sctp_ep.time_of_secret_change;
2591         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2592             sizeof(old_inp->sctp_ep.secret_key));
2593         new_inp->sctp_ep.current_secret_number =
2594             old_inp->sctp_ep.current_secret_number;
2595         new_inp->sctp_ep.last_secret_number =
2596             old_inp->sctp_ep.last_secret_number;
2597         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2598
2599         /* make it so new data pours into the new socket */
2600         stcb->sctp_socket = new_inp->sctp_socket;
2601         stcb->sctp_ep = new_inp;
2602
2603         /* Copy the port across */
2604         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2605         rport = stcb->rport;
2606         /* Pull the tcb from the old association */
2607         LIST_REMOVE(stcb, sctp_tcbhash);
2608         LIST_REMOVE(stcb, sctp_tcblist);
2609         if (stcb->asoc.in_asocid_hash) {
2610                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2611         }
2612         /* Now insert the new_inp into the TCP connected hash */
2613         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2614
2615         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2616         /* Its safe to access */
2617         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2618
2619         /* Now move the tcb into the endpoint list */
2620         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2621         /*
2622          * Question, do we even need to worry about the ep-hash since we
2623          * only have one connection? Probably not :> so lets get rid of it
2624          * and not suck up any kernel memory in that.
2625          */
2626         if (stcb->asoc.in_asocid_hash) {
2627                 struct sctpasochead *lhd;
2628
2629                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2630                     new_inp->hashasocidmark)];
2631                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2632         }
2633         /* Ok. Let's restart timer. */
2634         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2635                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2636                     stcb, net);
2637         }
2638
2639         SCTP_INP_INFO_WUNLOCK();
2640         if (new_inp->sctp_tcbhash != NULL) {
2641                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2642                 new_inp->sctp_tcbhash = NULL;
2643         }
2644         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2645                 /* Subset bound, so copy in the laddr list from the old_inp */
2646                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2647                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2648                         if (laddr == NULL) {
2649                                 /*
2650                                  * Gak, what can we do? This assoc is really
2651                                  * HOSED. We probably should send an abort
2652                                  * here.
2653                                  */
2654                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2655                                 continue;
2656                         }
2657                         SCTP_INCR_LADDR_COUNT();
2658                         bzero(laddr, sizeof(*laddr));
2659                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2660                         laddr->ifa = oladdr->ifa;
2661                         atomic_add_int(&laddr->ifa->refcount, 1);
2662                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2663                             sctp_nxt_addr);
2664                         new_inp->laddr_count++;
2665                         if (oladdr == stcb->asoc.last_used_address) {
2666                                 stcb->asoc.last_used_address = laddr;
2667                         }
2668                 }
2669         }
2670         /*
2671          * Now any running timers need to be adjusted since we really don't
2672          * care if they are running or not just blast in the new_inp into
2673          * all of them.
2674          */
2675
2676         stcb->asoc.dack_timer.ep = (void *)new_inp;
2677         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2678         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2679         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2680         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2681         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2682         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2683         /* now what about the nets? */
2684         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2685                 net->pmtu_timer.ep = (void *)new_inp;
2686                 net->hb_timer.ep = (void *)new_inp;
2687                 net->rxt_timer.ep = (void *)new_inp;
2688         }
2689         SCTP_INP_WUNLOCK(new_inp);
2690         SCTP_INP_WUNLOCK(old_inp);
2691 }
2692
2693
2694
2695
2696 /* sctp_ifap is used to bypass normal local address validation checks */
2697 int
2698 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2699     struct sctp_ifa *sctp_ifap, struct thread *p)
2700 {
2701         /* bind a ep to a socket address */
2702         struct sctppcbhead *head;
2703         struct sctp_inpcb *inp, *inp_tmp;
2704         struct inpcb *ip_inp;
2705         int port_reuse_active = 0;
2706         int bindall;
2707         uint16_t lport;
2708         int error;
2709         uint32_t vrf_id;
2710
2711         lport = 0;
2712         error = 0;
2713         bindall = 1;
2714         inp = (struct sctp_inpcb *)so->so_pcb;
2715         ip_inp = (struct inpcb *)so->so_pcb;
2716 #ifdef SCTP_DEBUG
2717         if (addr) {
2718                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2719                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2720                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2721                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2722         }
2723 #endif
2724         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2725                 /* already did a bind, subsequent binds NOT allowed ! */
2726                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2727                 return (EINVAL);
2728         }
2729 #ifdef INVARIANTS
2730         if (p == NULL)
2731                 panic("null proc/thread");
2732 #endif
2733         if (addr != NULL) {
2734                 switch (addr->sa_family) {
2735 #ifdef INET
2736                 case AF_INET:
2737                         {
2738                                 struct sockaddr_in *sin;
2739
2740                                 /* IPV6_V6ONLY socket? */
2741                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2742                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2743                                         return (EINVAL);
2744                                 }
2745                                 if (addr->sa_len != sizeof(*sin)) {
2746                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2747                                         return (EINVAL);
2748                                 }
2749                                 sin = (struct sockaddr_in *)addr;
2750                                 lport = sin->sin_port;
2751                                 /*
2752                                  * For LOOPBACK the prison_local_ip4() call
2753                                  * will transmute the ip address to the
2754                                  * proper value.
2755                                  */
2756                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2757                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2758                                         return (error);
2759                                 }
2760                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2761                                         bindall = 0;
2762                                 }
2763                                 break;
2764                         }
2765 #endif
2766 #ifdef INET6
2767                 case AF_INET6:
2768                         {
2769                                 /*
2770                                  * Only for pure IPv6 Address. (No IPv4
2771                                  * Mapped!)
2772                                  */
2773                                 struct sockaddr_in6 *sin6;
2774
2775                                 sin6 = (struct sockaddr_in6 *)addr;
2776
2777                                 if (addr->sa_len != sizeof(*sin6)) {
2778                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2779                                         return (EINVAL);
2780                                 }
2781                                 lport = sin6->sin6_port;
2782                                 /*
2783                                  * For LOOPBACK the prison_local_ip6() call
2784                                  * will transmute the ipv6 address to the
2785                                  * proper value.
2786                                  */
2787                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2788                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2789                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2790                                         return (error);
2791                                 }
2792                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2793                                         bindall = 0;
2794                                         /* KAME hack: embed scopeid */
2795                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2796                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2797                                                 return (EINVAL);
2798                                         }
2799                                 }
2800                                 /* this must be cleared for ifa_ifwithaddr() */
2801                                 sin6->sin6_scope_id = 0;
2802                                 break;
2803                         }
2804 #endif
2805                 default:
2806                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2807                         return (EAFNOSUPPORT);
2808                 }
2809         }
2810         SCTP_INP_INFO_WLOCK();
2811         SCTP_INP_WLOCK(inp);
2812         /* Setup a vrf_id to be the default for the non-bind-all case. */
2813         vrf_id = inp->def_vrf_id;
2814
2815         /* increase our count due to the unlock we do */
2816         SCTP_INP_INCR_REF(inp);
2817         if (lport) {
2818                 /*
2819                  * Did the caller specify a port? if so we must see if an ep
2820                  * already has this one bound.
2821                  */
2822                 /* got to be root to get at low ports */
2823                 if (ntohs(lport) < IPPORT_RESERVED) {
2824                         if (p && (error =
2825                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2826                             )) {
2827                                 SCTP_INP_DECR_REF(inp);
2828                                 SCTP_INP_WUNLOCK(inp);
2829                                 SCTP_INP_INFO_WUNLOCK();
2830                                 return (error);
2831                         }
2832                 }
2833                 if (p == NULL) {
2834                         SCTP_INP_DECR_REF(inp);
2835                         SCTP_INP_WUNLOCK(inp);
2836                         SCTP_INP_INFO_WUNLOCK();
2837                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2838                         return (error);
2839                 }
2840                 SCTP_INP_WUNLOCK(inp);
2841                 if (bindall) {
2842                         vrf_id = inp->def_vrf_id;
2843                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2844                         if (inp_tmp != NULL) {
2845                                 /*
2846                                  * lock guy returned and lower count note
2847                                  * that we are not bound so inp_tmp should
2848                                  * NEVER be inp. And it is this inp
2849                                  * (inp_tmp) that gets the reference bump,
2850                                  * so we must lower it.
2851                                  */
2852                                 SCTP_INP_DECR_REF(inp_tmp);
2853                                 /* unlock info */
2854                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2855                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2856                                         /*
2857                                          * Ok, must be one-2-one and
2858                                          * allowing port re-use
2859                                          */
2860                                         port_reuse_active = 1;
2861                                         goto continue_anyway;
2862                                 }
2863                                 SCTP_INP_DECR_REF(inp);
2864                                 SCTP_INP_INFO_WUNLOCK();
2865                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2866                                 return (EADDRINUSE);
2867                         }
2868                 } else {
2869                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2870                         if (inp_tmp != NULL) {
2871                                 /*
2872                                  * lock guy returned and lower count note
2873                                  * that we are not bound so inp_tmp should
2874                                  * NEVER be inp. And it is this inp
2875                                  * (inp_tmp) that gets the reference bump,
2876                                  * so we must lower it.
2877                                  */
2878                                 SCTP_INP_DECR_REF(inp_tmp);
2879                                 /* unlock info */
2880                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2881                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2882                                         /*
2883                                          * Ok, must be one-2-one and
2884                                          * allowing port re-use
2885                                          */
2886                                         port_reuse_active = 1;
2887                                         goto continue_anyway;
2888                                 }
2889                                 SCTP_INP_DECR_REF(inp);
2890                                 SCTP_INP_INFO_WUNLOCK();
2891                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2892                                 return (EADDRINUSE);
2893                         }
2894                 }
2895 continue_anyway:
2896                 SCTP_INP_WLOCK(inp);
2897                 if (bindall) {
2898                         /* verify that no lport is not used by a singleton */
2899                         if ((port_reuse_active == 0) &&
2900                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
2901                                 /* Sorry someone already has this one bound */
2902                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2903                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2904                                         port_reuse_active = 1;
2905                                 } else {
2906                                         SCTP_INP_DECR_REF(inp);
2907                                         SCTP_INP_WUNLOCK(inp);
2908                                         SCTP_INP_INFO_WUNLOCK();
2909                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2910                                         return (EADDRINUSE);
2911                                 }
2912                         }
2913                 }
2914         } else {
2915                 uint16_t first, last, candidate;
2916                 uint16_t count;
2917                 int done;
2918
2919                 if (ip_inp->inp_flags & INP_HIGHPORT) {
2920                         first = MODULE_GLOBAL(ipport_hifirstauto);
2921                         last = MODULE_GLOBAL(ipport_hilastauto);
2922                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2923                         if (p && (error =
2924                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2925                             )) {
2926                                 SCTP_INP_DECR_REF(inp);
2927                                 SCTP_INP_WUNLOCK(inp);
2928                                 SCTP_INP_INFO_WUNLOCK();
2929                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2930                                 return (error);
2931                         }
2932                         first = MODULE_GLOBAL(ipport_lowfirstauto);
2933                         last = MODULE_GLOBAL(ipport_lowlastauto);
2934                 } else {
2935                         first = MODULE_GLOBAL(ipport_firstauto);
2936                         last = MODULE_GLOBAL(ipport_lastauto);
2937                 }
2938                 if (first > last) {
2939                         uint16_t temp;
2940
2941                         temp = first;
2942                         first = last;
2943                         last = temp;
2944                 }
2945                 count = last - first + 1;       /* number of candidates */
2946                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2947
2948                 done = 0;
2949                 while (!done) {
2950                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
2951                                 done = 1;
2952                         }
2953                         if (!done) {
2954                                 if (--count == 0) {
2955                                         SCTP_INP_DECR_REF(inp);
2956                                         SCTP_INP_WUNLOCK(inp);
2957                                         SCTP_INP_INFO_WUNLOCK();
2958                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2959                                         return (EADDRINUSE);
2960                                 }
2961                                 if (candidate == last)
2962                                         candidate = first;
2963                                 else
2964                                         candidate = candidate + 1;
2965                         }
2966                 }
2967                 lport = htons(candidate);
2968         }
2969         SCTP_INP_DECR_REF(inp);
2970         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2971             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2972                 /*
2973                  * this really should not happen. The guy did a non-blocking
2974                  * bind and then did a close at the same time.
2975                  */
2976                 SCTP_INP_WUNLOCK(inp);
2977                 SCTP_INP_INFO_WUNLOCK();
2978                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2979                 return (EINVAL);
2980         }
2981         /* ok we look clear to give out this port, so lets setup the binding */
2982         if (bindall) {
2983                 /* binding to all addresses, so just set in the proper flags */
2984                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
2985                 /* set the automatic addr changes from kernel flag */
2986                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
2987                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2988                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2989                 } else {
2990                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2991                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2992                 }
2993                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
2994                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2995                 } else {
2996                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2997                 }
2998                 /*
2999                  * set the automatic mobility_base from kernel flag (by
3000                  * micchie)
3001                  */
3002                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3003                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3004                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3005                 } else {
3006                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3007                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3008                 }
3009                 /*
3010                  * set the automatic mobility_fasthandoff from kernel flag
3011                  * (by micchie)
3012                  */
3013                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3014                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3015                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3016                 } else {
3017                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3018                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3019                 }
3020         } else {
3021                 /*
3022                  * bind specific, make sure flags is off and add a new
3023                  * address structure to the sctp_addr_list inside the ep
3024                  * structure.
3025                  *
3026                  * We will need to allocate one and insert it at the head. The
3027                  * socketopt call can just insert new addresses in there as
3028                  * well. It will also have to do the embed scope kame hack
3029                  * too (before adding).
3030                  */
3031                 struct sctp_ifa *ifa;
3032                 struct sockaddr_storage store_sa;
3033
3034                 memset(&store_sa, 0, sizeof(store_sa));
3035                 switch (addr->sa_family) {
3036 #ifdef INET
3037                 case AF_INET:
3038                         {
3039                                 struct sockaddr_in *sin;
3040
3041                                 sin = (struct sockaddr_in *)&store_sa;
3042                                 memcpy(sin, addr, sizeof(struct sockaddr_in));
3043                                 sin->sin_port = 0;
3044                                 break;
3045                         }
3046 #endif
3047 #ifdef INET6
3048                 case AF_INET6:
3049                         {
3050                                 struct sockaddr_in6 *sin6;
3051
3052                                 sin6 = (struct sockaddr_in6 *)&store_sa;
3053                                 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3054                                 sin6->sin6_port = 0;
3055                                 break;
3056                         }
3057 #endif
3058                 default:
3059                         break;
3060                 }
3061                 /*
3062                  * first find the interface with the bound address need to
3063                  * zero out the port to find the address! yuck! can't do
3064                  * this earlier since need port for sctp_pcb_findep()
3065                  */
3066                 if (sctp_ifap != NULL) {
3067                         ifa = sctp_ifap;
3068                 } else {
3069                         /*
3070                          * Note for BSD we hit here always other O/S's will
3071                          * pass things in via the sctp_ifap argument
3072                          * (Panda).
3073                          */
3074                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3075                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3076                 }
3077                 if (ifa == NULL) {
3078                         /* Can't find an interface with that address */
3079                         SCTP_INP_WUNLOCK(inp);
3080                         SCTP_INP_INFO_WUNLOCK();
3081                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3082                         return (EADDRNOTAVAIL);
3083                 }
3084 #ifdef INET6
3085                 if (addr->sa_family == AF_INET6) {
3086                         /* GAK, more FIXME IFA lock? */
3087                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3088                                 /* Can't bind a non-existent addr. */
3089                                 SCTP_INP_WUNLOCK(inp);
3090                                 SCTP_INP_INFO_WUNLOCK();
3091                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3092                                 return (EINVAL);
3093                         }
3094                 }
3095 #endif
3096                 /* we're not bound all */
3097                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3098                 /* allow bindx() to send ASCONF's for binding changes */
3099                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3100                 /* clear automatic addr changes from kernel flag */
3101                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3102
3103                 /* add this address to the endpoint list */
3104                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3105                 if (error != 0) {
3106                         SCTP_INP_WUNLOCK(inp);
3107                         SCTP_INP_INFO_WUNLOCK();
3108                         return (error);
3109                 }
3110                 inp->laddr_count++;
3111         }
3112         /* find the bucket */
3113         if (port_reuse_active) {
3114                 /* Put it into tcp 1-2-1 hash */
3115                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3116                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3117         } else {
3118                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3119         }
3120         /* put it in the bucket */
3121         LIST_INSERT_HEAD(head, inp, sctp_hash);
3122         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3123             (void *)head, ntohs(lport), port_reuse_active);
3124         /* set in the port */
3125         inp->sctp_lport = lport;
3126
3127         /* turn off just the unbound flag */
3128         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3129         SCTP_INP_WUNLOCK(inp);
3130         SCTP_INP_INFO_WUNLOCK();
3131         return (0);
3132 }
3133
3134
3135 static void
3136 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3137 {
3138         struct sctp_iterator *it, *nit;
3139
3140         /*
3141          * We enter with the only the ITERATOR_LOCK in place and a write
3142          * lock on the inp_info stuff.
3143          */
3144         it = sctp_it_ctl.cur_it;
3145         if (it && (it->vn != curvnet)) {
3146                 /* Its not looking at our VNET */
3147                 return;
3148         }
3149         if (it && (it->inp == inp)) {
3150                 /*
3151                  * This is tricky and we hold the iterator lock, but when it
3152                  * returns and gets the lock (when we release it) the
3153                  * iterator will try to operate on inp. We need to stop that
3154                  * from happening. But of course the iterator has a
3155                  * reference on the stcb and inp. We can mark it and it will
3156                  * stop.
3157                  *
3158                  * If its a single iterator situation, we set the end iterator
3159                  * flag. Otherwise we set the iterator to go to the next
3160                  * inp.
3161                  *
3162                  */
3163                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3164                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3165                 } else {
3166                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3167                 }
3168         }
3169         /*
3170          * Now go through and remove any single reference to our inp that
3171          * may be still pending on the list
3172          */
3173         SCTP_IPI_ITERATOR_WQ_LOCK();
3174         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3175                 if (it->vn != curvnet) {
3176                         continue;
3177                 }
3178                 if (it->inp == inp) {
3179                         /* This one points to me is it inp specific? */
3180                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3181                                 /* Remove and free this one */
3182                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3183                                     it, sctp_nxt_itr);
3184                                 if (it->function_atend != NULL) {
3185                                         (*it->function_atend) (it->pointer, it->val);
3186                                 }
3187                                 SCTP_FREE(it, SCTP_M_ITER);
3188                         } else {
3189                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3190                                 if (it->inp) {
3191                                         SCTP_INP_INCR_REF(it->inp);
3192                                 }
3193                         }
3194                         /*
3195                          * When its put in the refcnt is incremented so decr
3196                          * it
3197                          */
3198                         SCTP_INP_DECR_REF(inp);
3199                 }
3200         }
3201         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3202 }
3203
3204 /* release sctp_inpcb unbind the port */
3205 void
3206 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3207 {
3208         /*
3209          * Here we free a endpoint. We must find it (if it is in the Hash
3210          * table) and remove it from there. Then we must also find it in the
3211          * overall list and remove it from there. After all removals are
3212          * complete then any timer has to be stopped. Then start the actual
3213          * freeing. a) Any local lists. b) Any associations. c) The hash of
3214          * all associations. d) finally the ep itself.
3215          */
3216         struct sctp_tcb *asoc, *nasoc;
3217         struct sctp_laddr *laddr, *nladdr;
3218         struct inpcb *ip_pcb;
3219         struct socket *so;
3220         int being_refed = 0;
3221         struct sctp_queued_to_read *sq, *nsq;
3222         int cnt;
3223         sctp_sharedkey_t *shared_key, *nshared_key;
3224
3225
3226 #ifdef SCTP_LOG_CLOSING
3227         sctp_log_closing(inp, NULL, 0);
3228 #endif
3229         SCTP_ITERATOR_LOCK();
3230         /* mark any iterators on the list or being processed */
3231         sctp_iterator_inp_being_freed(inp);
3232         SCTP_ITERATOR_UNLOCK();
3233         so = inp->sctp_socket;
3234         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3235                 /* been here before.. eeks.. get out of here */
3236                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3237 #ifdef SCTP_LOG_CLOSING
3238                 sctp_log_closing(inp, NULL, 1);
3239 #endif
3240                 return;
3241         }
3242         SCTP_ASOC_CREATE_LOCK(inp);
3243         SCTP_INP_INFO_WLOCK();
3244
3245         SCTP_INP_WLOCK(inp);
3246         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3247                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3248                 /* socket is gone, so no more wakeups allowed */
3249                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3250                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3251                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3252
3253         }
3254         /* First time through we have the socket lock, after that no more. */
3255         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3256             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3257
3258         if (inp->control) {
3259                 sctp_m_freem(inp->control);
3260                 inp->control = NULL;
3261         }
3262         if (inp->pkt) {
3263                 sctp_m_freem(inp->pkt);
3264                 inp->pkt = NULL;
3265         }
3266         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3267                                          * here but I will be nice :> (i.e.
3268                                          * ip_pcb = ep;) */
3269         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3270                 int cnt_in_sd;
3271
3272                 cnt_in_sd = 0;
3273                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3274                         SCTP_TCB_LOCK(asoc);
3275                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3276                                 /* Skip guys being freed */
3277                                 cnt_in_sd++;
3278                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3279                                         /*
3280                                          * Special case - we did not start a
3281                                          * kill timer on the asoc due to it
3282                                          * was not closed. So go ahead and
3283                                          * start it now.
3284                                          */
3285                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3286                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3287                                 }
3288                                 SCTP_TCB_UNLOCK(asoc);
3289                                 continue;
3290                         }
3291                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3292                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3293                             (asoc->asoc.total_output_queue_size == 0)) {
3294                                 /*
3295                                  * If we have data in queue, we don't want
3296                                  * to just free since the app may have done,
3297                                  * send()/close or connect/send/close. And
3298                                  * it wants the data to get across first.
3299                                  */
3300                                 /* Just abandon things in the front states */
3301                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3302                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3303                                         cnt_in_sd++;
3304                                 }
3305                                 continue;
3306                         }
3307                         /* Disconnect the socket please */
3308                         asoc->sctp_socket = NULL;
3309                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3310                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3311                             (asoc->asoc.control_pdapi) ||
3312                             (asoc->asoc.size_on_all_streams > 0) ||
3313                             (so && (so->so_rcv.sb_cc > 0))) {
3314                                 /* Left with Data unread */
3315                                 struct mbuf *op_err;
3316
3317                                 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
3318                                     0, M_DONTWAIT, 1, MT_DATA);
3319                                 if (op_err) {
3320                                         /* Fill in the user initiated abort */
3321                                         struct sctp_paramhdr *ph;
3322
3323                                         SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr);
3324                                         ph = mtod(op_err, struct sctp_paramhdr *);
3325                                         ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
3326                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
3327                                 }
3328                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3329                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3330                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3331                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3332                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3333                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3334                                 }
3335                                 if (sctp_free_assoc(inp, asoc,
3336                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3337                                         cnt_in_sd++;
3338                                 }
3339                                 continue;
3340                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3341                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3342                             (asoc->asoc.stream_queue_cnt == 0)) {
3343                                 if (asoc->asoc.locked_on_sending) {
3344                                         goto abort_anyway;
3345                                 }
3346                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3347                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3348                                         struct sctp_nets *netp;
3349
3350                                         /*
3351                                          * there is nothing queued to send,
3352                                          * so I send shutdown
3353                                          */
3354                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3355                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3356                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3357                                         }
3358                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3359                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3360                                         sctp_stop_timers_for_shutdown(asoc);
3361                                         if (asoc->asoc.alternate) {
3362                                                 netp = asoc->asoc.alternate;
3363                                         } else {
3364                                                 netp = asoc->asoc.primary_destination;
3365                                         }
3366                                         sctp_send_shutdown(asoc, netp);
3367                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3368                                             netp);
3369                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3370                                             asoc->asoc.primary_destination);
3371                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3372                                 }
3373                         } else {
3374                                 /* mark into shutdown pending */
3375                                 struct sctp_stream_queue_pending *sp;
3376
3377                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3378                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3379                                     asoc->asoc.primary_destination);
3380                                 if (asoc->asoc.locked_on_sending) {
3381                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3382                                             sctp_streamhead);
3383                                         if (sp == NULL) {
3384                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3385                                                     (void *)asoc->asoc.locked_on_sending,
3386                                                     asoc->asoc.locked_on_sending->stream_no);
3387                                         } else {
3388                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3389                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3390                                         }
3391                                 }
3392                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3393                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3394                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3395                                         struct mbuf *op_err;
3396
3397                         abort_anyway:
3398                                         op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
3399                                             0, M_DONTWAIT, 1, MT_DATA);
3400                                         if (op_err) {
3401                                                 /*
3402                                                  * Fill in the user
3403                                                  * initiated abort
3404                                                  */
3405                                                 struct sctp_paramhdr *ph;
3406
3407                                                 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr);
3408                                                 ph = mtod(op_err, struct sctp_paramhdr *);
3409                                                 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
3410                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3411                                         }
3412                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3413                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3414                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3415                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3416                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3417                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3418                                         }
3419                                         if (sctp_free_assoc(inp, asoc,
3420                                             SCTP_PCBFREE_NOFORCE,
3421                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3422                                                 cnt_in_sd++;
3423                                         }
3424                                         continue;
3425                                 } else {
3426                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3427                                 }
3428                         }
3429                         cnt_in_sd++;
3430                         SCTP_TCB_UNLOCK(asoc);
3431                 }
3432                 /* now is there some left in our SHUTDOWN state? */
3433                 if (cnt_in_sd) {
3434 #ifdef SCTP_LOG_CLOSING
3435                         sctp_log_closing(inp, NULL, 2);
3436 #endif
3437                         inp->sctp_socket = NULL;
3438                         SCTP_INP_WUNLOCK(inp);
3439                         SCTP_ASOC_CREATE_UNLOCK(inp);
3440                         SCTP_INP_INFO_WUNLOCK();
3441                         return;
3442                 }
3443         }
3444         inp->sctp_socket = NULL;
3445         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3446             SCTP_PCB_FLAGS_UNBOUND) {
3447                 /*
3448                  * ok, this guy has been bound. It's port is somewhere in
3449                  * the SCTP_BASE_INFO(hash table). Remove it!
3450                  */
3451                 LIST_REMOVE(inp, sctp_hash);
3452                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3453         }
3454         /*
3455          * If there is a timer running to kill us, forget it, since it may
3456          * have a contest on the INP lock.. which would cause us to die ...
3457          */
3458         cnt = 0;
3459         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3460                 SCTP_TCB_LOCK(asoc);
3461                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3462                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3463                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3464                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3465                         }
3466                         cnt++;
3467                         SCTP_TCB_UNLOCK(asoc);
3468                         continue;
3469                 }
3470                 /* Free associations that are NOT killing us */
3471                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3472                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3473                         struct mbuf *op_err;
3474
3475                         op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
3476                             0, M_DONTWAIT, 1, MT_DATA);
3477                         if (op_err) {
3478                                 /* Fill in the user initiated abort */
3479                                 struct sctp_paramhdr *ph;
3480
3481                                 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr);
3482                                 ph = mtod(op_err, struct sctp_paramhdr *);
3483                                 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
3484                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3485                         }
3486                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3487                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3488                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3489                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3490                         cnt++;
3491                         SCTP_TCB_UNLOCK(asoc);
3492                         continue;
3493                 }
3494                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3495                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3496                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3497                 }
3498                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3499                         cnt++;
3500                 }
3501         }
3502         if (cnt) {
3503                 /* Ok we have someone out there that will kill us */
3504                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3505 #ifdef SCTP_LOG_CLOSING
3506                 sctp_log_closing(inp, NULL, 3);
3507 #endif
3508                 SCTP_INP_WUNLOCK(inp);
3509                 SCTP_ASOC_CREATE_UNLOCK(inp);
3510                 SCTP_INP_INFO_WUNLOCK();
3511                 return;
3512         }
3513         if (SCTP_INP_LOCK_CONTENDED(inp))
3514                 being_refed++;
3515         if (SCTP_INP_READ_CONTENDED(inp))
3516                 being_refed++;
3517         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3518                 being_refed++;
3519
3520         if ((inp->refcount) ||
3521             (being_refed) ||
3522             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3523                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3524 #ifdef SCTP_LOG_CLOSING
3525                 sctp_log_closing(inp, NULL, 4);
3526 #endif
3527                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3528                 SCTP_INP_WUNLOCK(inp);
3529                 SCTP_ASOC_CREATE_UNLOCK(inp);
3530                 SCTP_INP_INFO_WUNLOCK();
3531                 return;
3532         }
3533         inp->sctp_ep.signature_change.type = 0;
3534         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3535         /*
3536          * Remove it from the list .. last thing we need a lock for.
3537          */
3538         LIST_REMOVE(inp, sctp_list);
3539         SCTP_INP_WUNLOCK(inp);
3540         SCTP_ASOC_CREATE_UNLOCK(inp);
3541         SCTP_INP_INFO_WUNLOCK();
3542         /*
3543          * Now we release all locks. Since this INP cannot be found anymore
3544          * except possibly by the kill timer that might be running. We call
3545          * the drain function here. It should hit the case were it sees the
3546          * ACTIVE flag cleared and exit out freeing us to proceed and
3547          * destroy everything.
3548          */
3549         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3550                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3551         } else {
3552                 /* Probably un-needed */
3553                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3554         }
3555
3556 #ifdef SCTP_LOG_CLOSING
3557         sctp_log_closing(inp, NULL, 5);
3558 #endif
3559
3560
3561         if ((inp->sctp_asocidhash) != NULL) {
3562                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3563                 inp->sctp_asocidhash = NULL;
3564         }
3565         /* sa_ignore FREED_MEMORY */
3566         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3567                 /* Its only abandoned if it had data left */
3568                 if (sq->length)
3569                         SCTP_STAT_INCR(sctps_left_abandon);
3570
3571                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3572                 sctp_free_remote_addr(sq->whoFrom);
3573                 if (so)
3574                         so->so_rcv.sb_cc -= sq->length;
3575                 if (sq->data) {
3576                         sctp_m_freem(sq->data);
3577                         sq->data = NULL;
3578                 }
3579                 /*
3580                  * no need to free the net count, since at this point all
3581                  * assoc's are gone.
3582                  */
3583                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3584                 SCTP_DECR_READQ_COUNT();
3585         }
3586         /* Now the sctp_pcb things */
3587         /*
3588          * free each asoc if it is not already closed/free. we can't use the
3589          * macro here since le_next will get freed as part of the
3590          * sctp_free_assoc() call.
3591          */
3592         if (so) {
3593 #ifdef IPSEC
3594                 ipsec_delete_pcbpolicy(ip_pcb);
3595 #endif                          /* IPSEC */
3596
3597                 /* Unlocks not needed since the socket is gone now */
3598         }
3599         if (ip_pcb->inp_options) {
3600                 (void)sctp_m_free(ip_pcb->inp_options);
3601                 ip_pcb->inp_options = 0;
3602         }
3603 #ifdef INET6
3604         if (ip_pcb->inp_vflag & INP_IPV6) {
3605                 struct in6pcb *in6p;
3606
3607                 in6p = (struct in6pcb *)inp;
3608                 ip6_freepcbopts(in6p->in6p_outputopts);
3609         }
3610 #endif                          /* INET6 */
3611         ip_pcb->inp_vflag = 0;
3612         /* free up authentication fields */
3613         if (inp->sctp_ep.local_auth_chunks != NULL)
3614                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3615         if (inp->sctp_ep.local_hmacs != NULL)
3616                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3617
3618         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3619                 LIST_REMOVE(shared_key, next);
3620                 sctp_free_sharedkey(shared_key);
3621                 /* sa_ignore FREED_MEMORY */
3622         }
3623
3624         /*
3625          * if we have an address list the following will free the list of
3626          * ifaddr's that are set into this ep. Again macro limitations here,
3627          * since the LIST_FOREACH could be a bad idea.
3628          */
3629         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3630                 sctp_remove_laddr(laddr);
3631         }
3632
3633 #ifdef SCTP_TRACK_FREED_ASOCS
3634         /* TEMP CODE */
3635         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3636                 LIST_REMOVE(asoc, sctp_tcblist);
3637                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3638                 SCTP_DECR_ASOC_COUNT();
3639         }
3640         /* *** END TEMP CODE *** */
3641 #endif
3642         /* Now lets see about freeing the EP hash table. */
3643         if (inp->sctp_tcbhash != NULL) {
3644                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3645                 inp->sctp_tcbhash = NULL;
3646         }
3647         /* Now we must put the ep memory back into the zone pool */
3648         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3649         SCTP_INP_LOCK_DESTROY(inp);
3650         SCTP_INP_READ_DESTROY(inp);
3651         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3652         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3653         SCTP_DECR_EP_COUNT();
3654 }
3655
3656
3657 struct sctp_nets *
3658 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3659 {
3660         struct sctp_nets *net;
3661
3662         /* locate the address */
3663         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3664                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3665                         return (net);
3666         }
3667         return (NULL);
3668 }
3669
3670
3671 int
3672 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3673 {
3674         struct sctp_ifa *sctp_ifa;
3675
3676         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3677         if (sctp_ifa) {
3678                 return (1);
3679         } else {
3680                 return (0);
3681         }
3682 }
3683
3684 /*
3685  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3686  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3687  * stats of stuff.
3688  */
3689 int
3690 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3691     struct sctp_nets **netp, int set_scope, int from)
3692 {
3693         /*
3694          * The following is redundant to the same lines in the
3695          * sctp_aloc_assoc() but is needed since others call the add address
3696          * function
3697          */
3698         struct sctp_nets *net, *netfirst;
3699         int addr_inscope;
3700
3701         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3702             from);
3703         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3704
3705         netfirst = sctp_findnet(stcb, newaddr);
3706         if (netfirst) {
3707                 /*
3708                  * Lie and return ok, we don't want to make the association
3709                  * go away for this behavior. It will happen in the TCP
3710                  * model in a connected socket. It does not reach the hash
3711                  * table until after the association is built so it can't be
3712                  * found. Mark as reachable, since the initial creation will
3713                  * have been cleared and the NOT_IN_ASSOC flag will have
3714                  * been added... and we don't want to end up removing it
3715                  * back out.
3716                  */
3717                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3718                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3719                             SCTP_ADDR_UNCONFIRMED);
3720                 } else {
3721                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3722                 }
3723
3724                 return (0);
3725         }
3726         addr_inscope = 1;
3727         switch (newaddr->sa_family) {
3728 #ifdef INET
3729         case AF_INET:
3730                 {
3731                         struct sockaddr_in *sin;
3732
3733                         sin = (struct sockaddr_in *)newaddr;
3734                         if (sin->sin_addr.s_addr == 0) {
3735                                 /* Invalid address */
3736                                 return (-1);
3737                         }
3738                         /* zero out the bzero area */
3739                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3740
3741                         /* assure len is set */
3742                         sin->sin_len = sizeof(struct sockaddr_in);
3743                         if (set_scope) {
3744 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3745                                 stcb->ipv4_local_scope = 1;
3746 #else
3747                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3748                                         stcb->asoc.scope.ipv4_local_scope = 1;
3749                                 }
3750 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3751                         } else {
3752                                 /* Validate the address is in scope */
3753                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3754                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3755                                         addr_inscope = 0;
3756                                 }
3757                         }
3758                         break;
3759                 }
3760 #endif
3761 #ifdef INET6
3762         case AF_INET6:
3763                 {
3764                         struct sockaddr_in6 *sin6;
3765
3766                         sin6 = (struct sockaddr_in6 *)newaddr;
3767                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3768                                 /* Invalid address */
3769                                 return (-1);
3770                         }
3771                         /* assure len is set */
3772                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3773                         if (set_scope) {
3774                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3775                                         stcb->asoc.scope.loopback_scope = 1;
3776                                         stcb->asoc.scope.local_scope = 0;
3777                                         stcb->asoc.scope.ipv4_local_scope = 1;
3778                                         stcb->asoc.scope.site_scope = 1;
3779                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3780                                         /*
3781                                          * If the new destination is a
3782                                          * LINK_LOCAL we must have common
3783                                          * site scope. Don't set the local
3784                                          * scope since we may not share all
3785                                          * links, only loopback can do this.
3786                                          * Links on the local network would
3787                                          * also be on our private network
3788                                          * for v4 too.
3789                                          */
3790                                         stcb->asoc.scope.ipv4_local_scope = 1;
3791                                         stcb->asoc.scope.site_scope = 1;
3792                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3793                                         /*
3794                                          * If the new destination is
3795                                          * SITE_LOCAL then we must have site
3796                                          * scope in common.
3797                                          */
3798                                         stcb->asoc.scope.site_scope = 1;
3799                                 }
3800                         } else {
3801                                 /* Validate the address is in scope */
3802                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3803                                     (stcb->asoc.scope.loopback_scope == 0)) {
3804                                         addr_inscope = 0;
3805                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3806                                     (stcb->asoc.scope.local_scope == 0)) {
3807                                         addr_inscope = 0;
3808                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3809                                     (stcb->asoc.scope.site_scope == 0)) {
3810                                         addr_inscope = 0;
3811                                 }
3812                         }
3813                         break;
3814                 }
3815 #endif
3816         default:
3817                 /* not supported family type */
3818                 return (-1);
3819         }
3820         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3821         if (net == NULL) {
3822                 return (-1);
3823         }
3824         SCTP_INCR_RADDR_COUNT();
3825         bzero(net, sizeof(struct sctp_nets));
3826         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3827         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3828         switch (newaddr->sa_family) {
3829 #ifdef INET
3830         case AF_INET:
3831                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3832                 break;
3833 #endif
3834 #ifdef INET6
3835         case AF_INET6:
3836                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3837                 break;
3838 #endif
3839         default:
3840                 break;
3841         }
3842         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3843         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3844                 stcb->asoc.scope.loopback_scope = 1;
3845                 stcb->asoc.scope.ipv4_local_scope = 1;
3846                 stcb->asoc.scope.local_scope = 0;
3847                 stcb->asoc.scope.site_scope = 1;
3848                 addr_inscope = 1;
3849         }
3850         net->failure_threshold = stcb->asoc.def_net_failure;
3851         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3852         if (addr_inscope == 0) {
3853                 net->dest_state = (SCTP_ADDR_REACHABLE |
3854                     SCTP_ADDR_OUT_OF_SCOPE);
3855         } else {
3856                 if (from == SCTP_ADDR_IS_CONFIRMED)
3857                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3858                         net->dest_state = SCTP_ADDR_REACHABLE;
3859                 else
3860                         net->dest_state = SCTP_ADDR_REACHABLE |
3861                             SCTP_ADDR_UNCONFIRMED;
3862         }
3863         /*
3864          * We set this to 0, the timer code knows that this means its an
3865          * initial value
3866          */
3867         net->rto_needed = 1;
3868         net->RTO = 0;
3869         net->RTO_measured = 0;
3870         stcb->asoc.numnets++;
3871         net->ref_count = 1;
3872         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3873         net->port = stcb->asoc.port;
3874         net->dscp = stcb->asoc.default_dscp;
3875 #ifdef INET6
3876         net->flowlabel = stcb->asoc.default_flowlabel;
3877 #endif
3878         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3879                 net->dest_state |= SCTP_ADDR_NOHB;
3880         } else {
3881                 net->dest_state &= ~SCTP_ADDR_NOHB;
3882         }
3883         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3884                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3885         } else {
3886                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3887         }
3888         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3889         /* Init the timer structure */
3890         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3891         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3892         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3893
3894         /* Now generate a route for this guy */
3895 #ifdef INET6
3896         /* KAME hack: embed scopeid */
3897         if (newaddr->sa_family == AF_INET6) {
3898                 struct sockaddr_in6 *sin6;
3899
3900                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3901                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3902                 sin6->sin6_scope_id = 0;
3903         }
3904 #endif
3905         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3906
3907         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3908                 /* Get source address */
3909                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3910                     stcb,
3911                     (sctp_route_t *) & net->ro,
3912                     net,
3913                     0,
3914                     stcb->asoc.vrf_id);
3915                 /* Now get the interface MTU */
3916                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3917                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3918                 }
3919                 if (net->mtu > 0) {
3920                         uint32_t rmtu;
3921
3922                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3923                         if (rmtu == 0) {
3924                                 /*
3925                                  * Start things off to match mtu of
3926                                  * interface please.
3927                                  */
3928                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3929                                     net->ro.ro_rt, net->mtu);
3930                         } else {
3931                                 /*
3932                                  * we take the route mtu over the interface,
3933                                  * since the route may be leading out the
3934                                  * loopback, or a different interface.
3935                                  */
3936                                 net->mtu = rmtu;
3937                         }
3938                 }
3939         }
3940         if (net->mtu == 0) {
3941                 switch (newaddr->sa_family) {
3942 #ifdef INET
3943                 case AF_INET:
3944                         net->mtu = SCTP_DEFAULT_MTU;
3945                         break;
3946 #endif
3947 #ifdef INET6
3948                 case AF_INET6:
3949                         net->mtu = 1280;
3950                         break;
3951 #endif
3952                 default:
3953                         break;
3954                 }
3955         }
3956         if (net->port) {
3957                 net->mtu -= (uint32_t) sizeof(struct udphdr);
3958         }
3959         if (from == SCTP_ALLOC_ASOC) {
3960                 stcb->asoc.smallest_mtu = net->mtu;
3961         }
3962         if (stcb->asoc.smallest_mtu > net->mtu) {
3963                 stcb->asoc.smallest_mtu = net->mtu;
3964         }
3965 #ifdef INET6
3966         if (newaddr->sa_family == AF_INET6) {
3967                 struct sockaddr_in6 *sin6;
3968
3969                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3970                 (void)sa6_recoverscope(sin6);
3971         }
3972 #endif
3973
3974         /* JRS - Use the congestion control given in the CC module */
3975         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
3976                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
3977
3978         /*
3979          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3980          * of assoc (2005/06/27, iyengar@cis.udel.edu)
3981          */
3982         net->find_pseudo_cumack = 1;
3983         net->find_rtx_pseudo_cumack = 1;
3984         net->src_addr_selected = 0;
3985         /* Choose an initial flowid. */
3986         net->flowid = stcb->asoc.my_vtag ^
3987             ntohs(stcb->rport) ^
3988             ntohs(stcb->sctp_ep->sctp_lport);
3989 #ifdef INVARIANTS
3990         net->flowidset = 1;
3991 #endif
3992         if (netp) {
3993                 *netp = net;
3994         }
3995         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3996         if (net->ro.ro_rt == NULL) {
3997                 /* Since we have no route put it at the back */
3998                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3999         } else if (netfirst == NULL) {
4000                 /* We are the first one in the pool. */
4001                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4002         } else if (netfirst->ro.ro_rt == NULL) {
4003                 /*
4004                  * First one has NO route. Place this one ahead of the first
4005                  * one.
4006                  */
4007                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4008         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4009                 /*
4010                  * This one has a different interface than the one at the
4011                  * top of the list. Place it ahead.
4012                  */
4013                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4014         } else {
4015                 /*
4016                  * Ok we have the same interface as the first one. Move
4017                  * forward until we find either a) one with a NULL route...
4018                  * insert ahead of that b) one with a different ifp.. insert
4019                  * after that. c) end of the list.. insert at the tail.
4020                  */
4021                 struct sctp_nets *netlook;
4022
4023                 do {
4024                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4025                         if (netlook == NULL) {
4026                                 /* End of the list */
4027                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4028                                 break;
4029                         } else if (netlook->ro.ro_rt == NULL) {
4030                                 /* next one has NO route */
4031                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4032                                 break;
4033                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4034                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4035                                     net, sctp_next);
4036                                 break;
4037                         }
4038                         /* Shift forward */
4039                         netfirst = netlook;
4040                 } while (netlook != NULL);
4041         }
4042
4043         /* got to have a primary set */
4044         if (stcb->asoc.primary_destination == 0) {
4045                 stcb->asoc.primary_destination = net;
4046         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4047                     (net->ro.ro_rt) &&
4048             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4049                 /* No route to current primary adopt new primary */
4050                 stcb->asoc.primary_destination = net;
4051         }
4052         /* Validate primary is first */
4053         net = TAILQ_FIRST(&stcb->asoc.nets);
4054         if ((net != stcb->asoc.primary_destination) &&
4055             (stcb->asoc.primary_destination)) {
4056                 /*
4057                  * first one on the list is NOT the primary sctp_cmpaddr()
4058                  * is much more efficient if the primary is the first on the
4059                  * list, make it so.
4060                  */
4061                 TAILQ_REMOVE(&stcb->asoc.nets,
4062                     stcb->asoc.primary_destination, sctp_next);
4063                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4064                     stcb->asoc.primary_destination, sctp_next);
4065         }
4066         return (0);
4067 }
4068
4069
4070 static uint32_t
4071 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4072 {
4073         uint32_t id;
4074         struct sctpasochead *head;
4075         struct sctp_tcb *lstcb;
4076
4077         SCTP_INP_WLOCK(inp);
4078 try_again:
4079         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4080                 /* TSNH */
4081                 SCTP_INP_WUNLOCK(inp);
4082                 return (0);
4083         }
4084         /*
4085          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4086          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4087          */
4088         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4089                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4090         }
4091         id = inp->sctp_associd_counter;
4092         inp->sctp_associd_counter++;
4093         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4094         if (lstcb) {
4095                 goto try_again;
4096         }
4097         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4098         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4099         stcb->asoc.in_asocid_hash = 1;
4100         SCTP_INP_WUNLOCK(inp);
4101         return id;
4102 }
4103
4104 /*
4105  * allocate an association and add it to the endpoint. The caller must be
4106  * careful to add all additional addresses once they are know right away or
4107  * else the assoc will be may experience a blackout scenario.
4108  */
4109 struct sctp_tcb *
4110 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4111     int *error, uint32_t override_tag, uint32_t vrf_id,
4112     struct thread *p
4113 )
4114 {
4115         /* note the p argument is only valid in unbound sockets */
4116
4117         struct sctp_tcb *stcb;
4118         struct sctp_association *asoc;
4119         struct sctpasochead *head;
4120         uint16_t rport;
4121         int err;
4122
4123         /*
4124          * Assumption made here: Caller has done a
4125          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4126          * address does not exist already.
4127          */
4128         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4129                 /* Hit max assoc, sorry no more */
4130                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4131                 *error = ENOBUFS;
4132                 return (NULL);
4133         }
4134         if (firstaddr == NULL) {
4135                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4136                 *error = EINVAL;
4137                 return (NULL);
4138         }
4139         SCTP_INP_RLOCK(inp);
4140         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4141             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4142             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4143                 /*
4144                  * If its in the TCP pool, its NOT allowed to create an
4145                  * association. The parent listener needs to call
4146                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4147                  * off, or connected one does this.. its an error.
4148                  */
4149                 SCTP_INP_RUNLOCK(inp);
4150                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4151                 *error = EINVAL;
4152                 return (NULL);
4153         }
4154         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4155             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4156                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4157                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4158                         SCTP_INP_RUNLOCK(inp);
4159                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4160                         *error = EINVAL;
4161                         return (NULL);
4162                 }
4163         }
4164         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4165 #ifdef SCTP_DEBUG
4166         if (firstaddr) {
4167                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4168                 switch (firstaddr->sa_family) {
4169 #ifdef INET
4170                 case AF_INET:
4171                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4172                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4173                         break;
4174 #endif
4175 #ifdef INET6
4176                 case AF_INET6:
4177                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4178                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4179                         break;
4180 #endif
4181                 default:
4182                         break;
4183                 }
4184         } else {
4185                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4186         }
4187 #endif                          /* SCTP_DEBUG */
4188         switch (firstaddr->sa_family) {
4189 #ifdef INET
4190         case AF_INET:
4191                 {
4192                         struct sockaddr_in *sin;
4193
4194                         sin = (struct sockaddr_in *)firstaddr;
4195                         if ((ntohs(sin->sin_port) == 0) ||
4196                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4197                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4198                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4199                                 /* Invalid address */
4200                                 SCTP_INP_RUNLOCK(inp);
4201                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4202                                 *error = EINVAL;
4203                                 return (NULL);
4204                         }
4205                         rport = sin->sin_port;
4206                         break;
4207                 }
4208 #endif
4209 #ifdef INET6
4210         case AF_INET6:
4211                 {
4212                         struct sockaddr_in6 *sin6;
4213
4214                         sin6 = (struct sockaddr_in6 *)firstaddr;
4215                         if ((ntohs(sin6->sin6_port) == 0) ||
4216                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4217                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4218                                 /* Invalid address */
4219                                 SCTP_INP_RUNLOCK(inp);
4220                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4221                                 *error = EINVAL;
4222                                 return (NULL);
4223                         }
4224                         rport = sin6->sin6_port;
4225                         break;
4226                 }
4227 #endif
4228         default:
4229                 /* not supported family type */
4230                 SCTP_INP_RUNLOCK(inp);
4231                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4232                 *error = EINVAL;
4233                 return (NULL);
4234         }
4235         SCTP_INP_RUNLOCK(inp);
4236         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4237                 /*
4238                  * If you have not performed a bind, then we need to do the
4239                  * ephemeral bind for you.
4240                  */
4241                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4242                     (struct sockaddr *)NULL,
4243                     (struct sctp_ifa *)NULL,
4244                     p
4245                     ))) {
4246                         /* bind error, probably perm */
4247                         *error = err;
4248                         return (NULL);
4249                 }
4250         }
4251         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4252         if (stcb == NULL) {
4253                 /* out of memory? */
4254                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4255                 *error = ENOMEM;
4256                 return (NULL);
4257         }
4258         SCTP_INCR_ASOC_COUNT();
4259
4260         bzero(stcb, sizeof(*stcb));
4261         asoc = &stcb->asoc;
4262
4263         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4264         SCTP_TCB_LOCK_INIT(stcb);
4265         SCTP_TCB_SEND_LOCK_INIT(stcb);
4266         stcb->rport = rport;
4267         /* setup back pointer's */
4268         stcb->sctp_ep = inp;
4269         stcb->sctp_socket = inp->sctp_socket;
4270         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4271                 /* failed */
4272                 SCTP_TCB_LOCK_DESTROY(stcb);
4273                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4274                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4275                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4276                 SCTP_DECR_ASOC_COUNT();
4277                 *error = err;
4278                 return (NULL);
4279         }
4280         /* and the port */
4281         SCTP_INP_INFO_WLOCK();
4282         SCTP_INP_WLOCK(inp);
4283         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4284                 /* inpcb freed while alloc going on */
4285                 SCTP_TCB_LOCK_DESTROY(stcb);
4286                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4287                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4288                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4289                 SCTP_INP_WUNLOCK(inp);
4290                 SCTP_INP_INFO_WUNLOCK();
4291                 SCTP_DECR_ASOC_COUNT();
4292                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4293                 *error = EINVAL;
4294                 return (NULL);
4295         }
4296         SCTP_TCB_LOCK(stcb);
4297
4298         /* now that my_vtag is set, add it to the hash */
4299         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4300         /* put it in the bucket in the vtag hash of assoc's for the system */
4301         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4302         SCTP_INP_INFO_WUNLOCK();
4303
4304         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4305                 /* failure.. memory error? */
4306                 if (asoc->strmout) {
4307                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4308                         asoc->strmout = NULL;
4309                 }
4310                 if (asoc->mapping_array) {
4311                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4312                         asoc->mapping_array = NULL;
4313                 }
4314                 if (asoc->nr_mapping_array) {
4315                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4316                         asoc->nr_mapping_array = NULL;
4317                 }
4318                 SCTP_DECR_ASOC_COUNT();
4319                 SCTP_TCB_LOCK_DESTROY(stcb);
4320                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4321                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4322                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4323                 SCTP_INP_WUNLOCK(inp);
4324                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4325                 *error = ENOBUFS;
4326                 return (NULL);
4327         }
4328         /* Init all the timers */
4329         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4330         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4331         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4332         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4333         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4334         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4335         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4336
4337         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4338         /* now file the port under the hash as well */
4339         if (inp->sctp_tcbhash != NULL) {
4340                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4341                     inp->sctp_hashmark)];
4342                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4343         }
4344         SCTP_INP_WUNLOCK(inp);
4345         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4346         return (stcb);
4347 }
4348
4349
4350 void
4351 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4352 {
4353         struct sctp_association *asoc;
4354
4355         asoc = &stcb->asoc;
4356         asoc->numnets--;
4357         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4358         if (net == asoc->primary_destination) {
4359                 /* Reset primary */
4360                 struct sctp_nets *lnet;
4361
4362                 lnet = TAILQ_FIRST(&asoc->nets);
4363                 /*
4364                  * Mobility adaptation Ideally, if deleted destination is
4365                  * the primary, it becomes a fast retransmission trigger by
4366                  * the subsequent SET PRIMARY. (by micchie)
4367                  */
4368                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4369                     SCTP_MOBILITY_BASE) ||
4370                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4371                     SCTP_MOBILITY_FASTHANDOFF)) {
4372                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4373                         if (asoc->deleted_primary != NULL) {
4374                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4375                                 goto out;
4376                         }
4377                         asoc->deleted_primary = net;
4378                         atomic_add_int(&net->ref_count, 1);
4379                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4380                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4381                         sctp_mobility_feature_on(stcb->sctp_ep,
4382                             SCTP_MOBILITY_PRIM_DELETED);
4383                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4384                             stcb->sctp_ep, stcb, NULL);
4385                 }
4386 out:
4387                 /* Try to find a confirmed primary */
4388                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4389         }
4390         if (net == asoc->last_data_chunk_from) {
4391                 /* Reset primary */
4392                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4393         }
4394         if (net == asoc->last_control_chunk_from) {
4395                 /* Clear net */
4396                 asoc->last_control_chunk_from = NULL;
4397         }
4398         if (net == stcb->asoc.alternate) {
4399                 sctp_free_remote_addr(stcb->asoc.alternate);
4400                 stcb->asoc.alternate = NULL;
4401         }
4402         sctp_free_remote_addr(net);
4403 }
4404
4405 /*
4406  * remove a remote endpoint address from an association, it will fail if the
4407  * address does not exist.
4408  */
4409 int
4410 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4411 {
4412         /*
4413          * Here we need to remove a remote address. This is quite simple, we
4414          * first find it in the list of address for the association
4415          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4416          * on that item. Note we do not allow it to be removed if there are
4417          * no other addresses.
4418          */
4419         struct sctp_association *asoc;
4420         struct sctp_nets *net, *nnet;
4421
4422         asoc = &stcb->asoc;
4423
4424         /* locate the address */
4425         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4426                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4427                         continue;
4428                 }
4429                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4430                     remaddr)) {
4431                         /* we found the guy */
4432                         if (asoc->numnets < 2) {
4433                                 /* Must have at LEAST two remote addresses */
4434                                 return (-1);
4435                         } else {
4436                                 sctp_remove_net(stcb, net);
4437                                 return (0);
4438                         }
4439                 }
4440         }
4441         /* not found. */
4442         return (-2);
4443 }
4444
4445 void
4446 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4447 {
4448         struct sctpvtaghead *chain;
4449         struct sctp_tagblock *twait_block;
4450         int found = 0;
4451         int i;
4452
4453         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4454         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4455                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4456                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4457                             (twait_block->vtag_block[i].lport == lport) &&
4458                             (twait_block->vtag_block[i].rport == rport)) {
4459                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4460                                 twait_block->vtag_block[i].v_tag = 0;
4461                                 twait_block->vtag_block[i].lport = 0;
4462                                 twait_block->vtag_block[i].rport = 0;
4463                                 found = 1;
4464                                 break;
4465                         }
4466                 }
4467                 if (found)
4468                         break;
4469         }
4470 }
4471
4472 int
4473 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4474 {
4475         struct sctpvtaghead *chain;
4476         struct sctp_tagblock *twait_block;
4477         int found = 0;
4478         int i;
4479
4480         SCTP_INP_INFO_WLOCK();
4481         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4482         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4483                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4484                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4485                             (twait_block->vtag_block[i].lport == lport) &&
4486                             (twait_block->vtag_block[i].rport == rport)) {
4487                                 found = 1;
4488                                 break;
4489                         }
4490                 }
4491                 if (found)
4492                         break;
4493         }
4494         SCTP_INP_INFO_WUNLOCK();
4495         return (found);
4496 }
4497
4498
4499 void
4500 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4501 {
4502         struct sctpvtaghead *chain;
4503         struct sctp_tagblock *twait_block;
4504         struct timeval now;
4505         int set, i;
4506
4507         if (time == 0) {
4508                 /* Its disabled */
4509                 return;
4510         }
4511         (void)SCTP_GETTIME_TIMEVAL(&now);
4512         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4513         set = 0;
4514         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4515                 /* Block(s) present, lets find space, and expire on the fly */
4516                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4517                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4518                             !set) {
4519                                 twait_block->vtag_block[i].tv_sec_at_expire =
4520                                     now.tv_sec + time;
4521                                 twait_block->vtag_block[i].v_tag = tag;
4522                                 twait_block->vtag_block[i].lport = lport;
4523                                 twait_block->vtag_block[i].rport = rport;
4524                                 set = 1;
4525                         } else if ((twait_block->vtag_block[i].v_tag) &&
4526                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4527                                 /* Audit expires this guy */
4528                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4529                                 twait_block->vtag_block[i].v_tag = 0;
4530                                 twait_block->vtag_block[i].lport = 0;
4531                                 twait_block->vtag_block[i].rport = 0;
4532                                 if (set == 0) {
4533                                         /* Reuse it for my new tag */
4534                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4535                                         twait_block->vtag_block[i].v_tag = tag;
4536                                         twait_block->vtag_block[i].lport = lport;
4537                                         twait_block->vtag_block[i].rport = rport;
4538                                         set = 1;
4539                                 }
4540                         }
4541                 }
4542                 if (set) {
4543                         /*
4544                          * We only do up to the block where we can place our
4545                          * tag for audits
4546                          */
4547                         break;
4548                 }
4549         }
4550         /* Need to add a new block to chain */
4551         if (!set) {
4552                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4553                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4554                 if (twait_block == NULL) {
4555 #ifdef INVARIANTS
4556                         panic("Can not alloc tagblock");
4557 #endif
4558                         return;
4559                 }
4560                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4561                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4562                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4563                 twait_block->vtag_block[0].v_tag = tag;
4564                 twait_block->vtag_block[0].lport = lport;
4565                 twait_block->vtag_block[0].rport = rport;
4566         }
4567 }
4568
4569
4570
4571 /*-
4572  * Free the association after un-hashing the remote port. This
4573  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4574  * expect that the input to this function IS a locked TCB.
4575  * It will return 0, if it did NOT destroy the association (instead
4576  * it unlocks it. It will return NON-zero if it either destroyed the
4577  * association OR the association is already destroyed.
4578  */
4579 int
4580 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4581 {
4582         int i;
4583         struct sctp_association *asoc;
4584         struct sctp_nets *net, *nnet;
4585         struct sctp_laddr *laddr, *naddr;
4586         struct sctp_tmit_chunk *chk, *nchk;
4587         struct sctp_asconf_addr *aparam, *naparam;
4588         struct sctp_asconf_ack *aack, *naack;
4589         struct sctp_stream_reset_list *strrst, *nstrrst;
4590         struct sctp_queued_to_read *sq, *nsq;
4591         struct sctp_stream_queue_pending *sp, *nsp;
4592         sctp_sharedkey_t *shared_key, *nshared_key;
4593         struct socket *so;
4594
4595         /* first, lets purge the entry from the hash table. */
4596
4597 #ifdef SCTP_LOG_CLOSING
4598         sctp_log_closing(inp, stcb, 6);
4599 #endif
4600         if (stcb->asoc.state == 0) {
4601 #ifdef SCTP_LOG_CLOSING
4602                 sctp_log_closing(inp, NULL, 7);
4603 #endif
4604                 /* there is no asoc, really TSNH :-0 */
4605                 return (1);
4606         }
4607         if (stcb->asoc.alternate) {
4608                 sctp_free_remote_addr(stcb->asoc.alternate);
4609                 stcb->asoc.alternate = NULL;
4610         }
4611         /* TEMP CODE */
4612         if (stcb->freed_from_where == 0) {
4613                 /* Only record the first place free happened from */
4614                 stcb->freed_from_where = from_location;
4615         }
4616         /* TEMP CODE */
4617
4618         asoc = &stcb->asoc;
4619         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4620             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4621                 /* nothing around */
4622                 so = NULL;
4623         else
4624                 so = inp->sctp_socket;
4625
4626         /*
4627          * We used timer based freeing if a reader or writer is in the way.
4628          * So we first check if we are actually being called from a timer,
4629          * if so we abort early if a reader or writer is still in the way.
4630          */
4631         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4632             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4633                 /*
4634                  * is it the timer driving us? if so are the reader/writers
4635                  * gone?
4636                  */
4637                 if (stcb->asoc.refcnt) {
4638                         /* nope, reader or writer in the way */
4639                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4640                         /* no asoc destroyed */
4641                         SCTP_TCB_UNLOCK(stcb);
4642 #ifdef SCTP_LOG_CLOSING
4643                         sctp_log_closing(inp, stcb, 8);
4644 #endif
4645                         return (0);
4646                 }
4647         }
4648         /* now clean up any other timers */
4649         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4650         asoc->dack_timer.self = NULL;
4651         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4652         /*-
4653          * For stream reset we don't blast this unless
4654          * it is a str-reset timer, it might be the
4655          * free-asoc timer which we DON'T want to
4656          * disturb.
4657          */
4658         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4659                 asoc->strreset_timer.self = NULL;
4660         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4661         asoc->asconf_timer.self = NULL;
4662         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4663         asoc->autoclose_timer.self = NULL;
4664         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4665         asoc->shut_guard_timer.self = NULL;
4666         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4667         asoc->delayed_event_timer.self = NULL;
4668         /* Mobility adaptation */
4669         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4670         asoc->delete_prim_timer.self = NULL;
4671         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4672                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4673                 net->rxt_timer.self = NULL;
4674                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4675                 net->pmtu_timer.self = NULL;
4676                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4677                 net->hb_timer.self = NULL;
4678         }
4679         /* Now the read queue needs to be cleaned up (only once) */
4680         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4681                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4682                 SCTP_INP_READ_LOCK(inp);
4683                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4684                         if (sq->stcb == stcb) {
4685                                 sq->do_not_ref_stcb = 1;
4686                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4687                                 /*
4688                                  * If there is no end, there never will be
4689                                  * now.
4690                                  */
4691                                 if (sq->end_added == 0) {
4692                                         /* Held for PD-API clear that. */
4693                                         sq->pdapi_aborted = 1;
4694                                         sq->held_length = 0;
4695                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4696                                                 /*
4697                                                  * Need to add a PD-API
4698                                                  * aborted indication.
4699                                                  * Setting the control_pdapi
4700                                                  * assures that it will be
4701                                                  * added right after this
4702                                                  * msg.
4703                                                  */
4704                                                 uint32_t strseq;
4705
4706                                                 stcb->asoc.control_pdapi = sq;
4707                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4708                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4709                                                     stcb,
4710                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4711                                                     (void *)&strseq,
4712                                                     SCTP_SO_LOCKED);
4713                                                 stcb->asoc.control_pdapi = NULL;
4714                                         }
4715                                 }
4716                                 /* Add an end to wake them */
4717                                 sq->end_added = 1;
4718                         }
4719                 }
4720                 SCTP_INP_READ_UNLOCK(inp);
4721                 if (stcb->block_entry) {
4722                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4723                         stcb->block_entry->error = ECONNRESET;
4724                         stcb->block_entry = NULL;
4725                 }
4726         }
4727         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4728                 /*
4729                  * Someone holds a reference OR the socket is unaccepted
4730                  * yet.
4731                  */
4732                 if ((stcb->asoc.refcnt) ||
4733                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4734                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4735                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4736                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4737                 }
4738                 SCTP_TCB_UNLOCK(stcb);
4739                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4740                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4741                         /* nothing around */
4742                         so = NULL;
4743                 if (so) {
4744                         /* Wake any reader/writers */
4745                         sctp_sorwakeup(inp, so);
4746                         sctp_sowwakeup(inp, so);
4747                 }
4748 #ifdef SCTP_LOG_CLOSING
4749                 sctp_log_closing(inp, stcb, 9);
4750 #endif
4751                 /* no asoc destroyed */
4752                 return (0);
4753         }
4754 #ifdef SCTP_LOG_CLOSING
4755         sctp_log_closing(inp, stcb, 10);
4756 #endif
4757         /*
4758          * When I reach here, no others want to kill the assoc yet.. and I
4759          * own the lock. Now its possible an abort comes in when I do the
4760          * lock exchange below to grab all the locks to do the final take
4761          * out. to prevent this we increment the count, which will start a
4762          * timer and blow out above thus assuring us that we hold exclusive
4763          * killing of the asoc. Note that after getting back the TCB lock we
4764          * will go ahead and increment the counter back up and stop any
4765          * timer a passing stranger may have started :-S
4766          */
4767         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4768                 atomic_add_int(&stcb->asoc.refcnt, 1);
4769
4770                 SCTP_TCB_UNLOCK(stcb);
4771                 SCTP_INP_INFO_WLOCK();
4772                 SCTP_INP_WLOCK(inp);
4773                 SCTP_TCB_LOCK(stcb);
4774         }
4775         /* Double check the GONE flag */
4776         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4777             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4778                 /* nothing around */
4779                 so = NULL;
4780
4781         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4782             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4783                 /*
4784                  * For TCP type we need special handling when we are
4785                  * connected. We also include the peel'ed off ones to.
4786                  */
4787                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4788                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4789                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4790                         if (so) {
4791                                 SOCK_LOCK(so);
4792                                 if (so->so_rcv.sb_cc == 0) {
4793                                         so->so_state &= ~(SS_ISCONNECTING |
4794                                             SS_ISDISCONNECTING |
4795                                             SS_ISCONFIRMING |
4796                                             SS_ISCONNECTED);
4797                                 }
4798                                 socantrcvmore_locked(so);
4799                                 sctp_sowwakeup(inp, so);
4800                                 sctp_sorwakeup(inp, so);
4801                                 SCTP_SOWAKEUP(so);
4802                         }
4803                 }
4804         }
4805         /*
4806          * Make it invalid too, that way if its about to run it will abort
4807          * and return.
4808          */
4809         /* re-increment the lock */
4810         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4811                 atomic_add_int(&stcb->asoc.refcnt, -1);
4812         }
4813         if (stcb->asoc.refcnt) {
4814                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4815                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4816                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4817                         SCTP_INP_INFO_WUNLOCK();
4818                         SCTP_INP_WUNLOCK(inp);
4819                 }
4820                 SCTP_TCB_UNLOCK(stcb);
4821                 return (0);
4822         }
4823         asoc->state = 0;
4824         if (inp->sctp_tcbhash) {
4825                 LIST_REMOVE(stcb, sctp_tcbhash);
4826         }
4827         if (stcb->asoc.in_asocid_hash) {
4828                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4829         }
4830         /* Now lets remove it from the list of ALL associations in the EP */
4831         LIST_REMOVE(stcb, sctp_tcblist);
4832         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4833                 SCTP_INP_INCR_REF(inp);
4834                 SCTP_INP_WUNLOCK(inp);
4835         }
4836         /* pull from vtag hash */
4837         LIST_REMOVE(stcb, sctp_asocs);
4838         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4839             inp->sctp_lport, stcb->rport);
4840
4841         /*
4842          * Now restop the timers to be sure this is paranoia at is finest!
4843          */
4844         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4845         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4846         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4847         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4848         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4849         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4850         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4851         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4852                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4853                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4854                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4855         }
4856
4857         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4858         /*
4859          * The chunk lists and such SHOULD be empty but we check them just
4860          * in case.
4861          */
4862         /* anything on the wheel needs to be removed */
4863         for (i = 0; i < asoc->streamoutcnt; i++) {
4864                 struct sctp_stream_out *outs;
4865
4866                 outs = &asoc->strmout[i];
4867                 /* now clean up any chunks here */
4868                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4869                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4870                         sctp_free_spbufspace(stcb, asoc, sp);
4871                         if (sp->data) {
4872                                 if (so) {
4873                                         /* Still an open socket - report */
4874                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4875                                             0, (void *)sp, SCTP_SO_LOCKED);
4876                                 }
4877                                 if (sp->data) {
4878                                         sctp_m_freem(sp->data);
4879                                         sp->data = NULL;
4880                                         sp->tail_mbuf = NULL;
4881                                         sp->length = 0;
4882                                 }
4883                         }
4884                         if (sp->net) {
4885                                 sctp_free_remote_addr(sp->net);
4886                                 sp->net = NULL;
4887                         }
4888                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4889                 }
4890         }
4891         /* sa_ignore FREED_MEMORY */
4892         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4893                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4894                 SCTP_FREE(strrst, SCTP_M_STRESET);
4895         }
4896         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4897                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4898                 if (sq->data) {
4899                         sctp_m_freem(sq->data);
4900                         sq->data = NULL;
4901                 }
4902                 sctp_free_remote_addr(sq->whoFrom);
4903                 sq->whoFrom = NULL;
4904                 sq->stcb = NULL;
4905                 /* Free the ctl entry */
4906                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4907                 SCTP_DECR_READQ_COUNT();
4908                 /* sa_ignore FREED_MEMORY */
4909         }
4910         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4911                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4912                 if (chk->data) {
4913                         sctp_m_freem(chk->data);
4914                         chk->data = NULL;
4915                 }
4916                 if (chk->holds_key_ref)
4917                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4918                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4919                 SCTP_DECR_CHK_COUNT();
4920                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4921                 asoc->free_chunk_cnt--;
4922                 /* sa_ignore FREED_MEMORY */
4923         }
4924         /* pending send queue SHOULD be empty */
4925         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4926                 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
4927                         asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
4928 #ifdef INVARIANTS
4929                 } else {
4930                         panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
4931 #endif
4932                 }
4933                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4934                 if (chk->data) {
4935                         if (so) {
4936                                 /* Still a socket? */
4937                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
4938                                     0, chk, SCTP_SO_LOCKED);
4939                         }
4940                         if (chk->data) {
4941                                 sctp_m_freem(chk->data);
4942                                 chk->data = NULL;
4943                         }
4944                 }
4945                 if (chk->holds_key_ref)
4946                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4947                 if (chk->whoTo) {
4948                         sctp_free_remote_addr(chk->whoTo);
4949                         chk->whoTo = NULL;
4950                 }
4951                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4952                 SCTP_DECR_CHK_COUNT();
4953                 /* sa_ignore FREED_MEMORY */
4954         }
4955         /* sent queue SHOULD be empty */
4956         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
4957                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
4958                         if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
4959                                 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
4960 #ifdef INVARIANTS
4961                         } else {
4962                                 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
4963 #endif
4964                         }
4965                 }
4966                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4967                 if (chk->data) {
4968                         if (so) {
4969                                 /* Still a socket? */
4970                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
4971                                     0, chk, SCTP_SO_LOCKED);
4972                         }
4973                         if (chk->data) {
4974                                 sctp_m_freem(chk->data);
4975                                 chk->data = NULL;
4976                         }
4977                 }
4978                 if (chk->holds_key_ref)
4979                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4980                 sctp_free_remote_addr(chk->whoTo);
4981                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4982                 SCTP_DECR_CHK_COUNT();
4983                 /* sa_ignore FREED_MEMORY */
4984         }
4985 #ifdef INVARIANTS
4986         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
4987                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
4988                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
4989                 }
4990         }
4991 #endif
4992         /* control queue MAY not be empty */
4993         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
4994                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4995                 if (chk->data) {
4996                         sctp_m_freem(chk->data);
4997                         chk->data = NULL;
4998                 }
4999                 if (chk->holds_key_ref)
5000                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5001                 sctp_free_remote_addr(chk->whoTo);
5002                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5003                 SCTP_DECR_CHK_COUNT();
5004                 /* sa_ignore FREED_MEMORY */
5005         }
5006         /* ASCONF queue MAY not be empty */
5007         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5008                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5009                 if (chk->data) {
5010                         sctp_m_freem(chk->data);
5011                         chk->data = NULL;
5012                 }
5013                 if (chk->holds_key_ref)
5014                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5015                 sctp_free_remote_addr(chk->whoTo);
5016                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5017                 SCTP_DECR_CHK_COUNT();
5018                 /* sa_ignore FREED_MEMORY */
5019         }
5020         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5021                 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5022                 if (chk->data) {
5023                         sctp_m_freem(chk->data);
5024                         chk->data = NULL;
5025                 }
5026                 if (chk->holds_key_ref)
5027                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5028                 sctp_free_remote_addr(chk->whoTo);
5029                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5030                 SCTP_DECR_CHK_COUNT();
5031                 /* sa_ignore FREED_MEMORY */
5032         }
5033
5034         if (asoc->mapping_array) {
5035                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5036                 asoc->mapping_array = NULL;
5037         }
5038         if (asoc->nr_mapping_array) {
5039                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5040                 asoc->nr_mapping_array = NULL;
5041         }
5042         /* the stream outs */
5043         if (asoc->strmout) {
5044                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5045                 asoc->strmout = NULL;
5046         }
5047         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5048         if (asoc->strmin) {
5049                 struct sctp_queued_to_read *ctl, *nctl;
5050
5051                 for (i = 0; i < asoc->streamincnt; i++) {
5052                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5053                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5054                                 sctp_free_remote_addr(ctl->whoFrom);
5055                                 if (ctl->data) {
5056                                         sctp_m_freem(ctl->data);
5057                                         ctl->data = NULL;
5058                                 }
5059                                 /*
5060                                  * We don't free the address here since all
5061                                  * the net's were freed above.
5062                                  */
5063                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5064                                 SCTP_DECR_READQ_COUNT();
5065                         }
5066                 }
5067                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5068                 asoc->strmin = NULL;
5069         }
5070         asoc->streamincnt = 0;
5071         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5072 #ifdef INVARIANTS
5073                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5074                         panic("no net's left alloc'ed, or list points to itself");
5075                 }
5076 #endif
5077                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5078                 sctp_free_remote_addr(net);
5079         }
5080         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5081                 /* sa_ignore FREED_MEMORY */
5082                 sctp_remove_laddr(laddr);
5083         }
5084
5085         /* pending asconf (address) parameters */
5086         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5087                 /* sa_ignore FREED_MEMORY */
5088                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5089                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5090         }
5091         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5092                 /* sa_ignore FREED_MEMORY */
5093                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5094                 if (aack->data != NULL) {
5095                         sctp_m_freem(aack->data);
5096                 }
5097                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5098         }
5099         /* clean up auth stuff */
5100         if (asoc->local_hmacs)
5101                 sctp_free_hmaclist(asoc->local_hmacs);
5102         if (asoc->peer_hmacs)
5103                 sctp_free_hmaclist(asoc->peer_hmacs);
5104
5105         if (asoc->local_auth_chunks)
5106                 sctp_free_chunklist(asoc->local_auth_chunks);
5107         if (asoc->peer_auth_chunks)
5108                 sctp_free_chunklist(asoc->peer_auth_chunks);
5109
5110         sctp_free_authinfo(&asoc->authinfo);
5111
5112         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5113                 LIST_REMOVE(shared_key, next);
5114                 sctp_free_sharedkey(shared_key);
5115                 /* sa_ignore FREED_MEMORY */
5116         }
5117
5118         /* Insert new items here :> */
5119
5120         /* Get rid of LOCK */
5121         SCTP_TCB_LOCK_DESTROY(stcb);
5122         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5123         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5124                 SCTP_INP_INFO_WUNLOCK();
5125                 SCTP_INP_RLOCK(inp);
5126         }
5127 #ifdef SCTP_TRACK_FREED_ASOCS
5128         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5129                 /* now clean up the tasoc itself */
5130                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5131                 SCTP_DECR_ASOC_COUNT();
5132         } else {
5133                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5134         }
5135 #else
5136         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5137         SCTP_DECR_ASOC_COUNT();
5138 #endif
5139         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5140                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5141                         /*
5142                          * If its NOT the inp_free calling us AND sctp_close
5143                          * as been called, we call back...
5144                          */
5145                         SCTP_INP_RUNLOCK(inp);
5146                         /*
5147                          * This will start the kill timer (if we are the
5148                          * last one) since we hold an increment yet. But
5149                          * this is the only safe way to do this since
5150                          * otherwise if the socket closes at the same time
5151                          * we are here we might collide in the cleanup.
5152                          */
5153                         sctp_inpcb_free(inp,
5154                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5155                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5156                         SCTP_INP_DECR_REF(inp);
5157                         goto out_of;
5158                 } else {
5159                         /* The socket is still open. */
5160                         SCTP_INP_DECR_REF(inp);
5161                 }
5162         }
5163         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5164                 SCTP_INP_RUNLOCK(inp);
5165         }
5166 out_of:
5167         /* destroyed the asoc */
5168 #ifdef SCTP_LOG_CLOSING
5169         sctp_log_closing(inp, NULL, 11);
5170 #endif
5171         return (1);
5172 }
5173
5174
5175
5176 /*
5177  * determine if a destination is "reachable" based upon the addresses bound
5178  * to the current endpoint (e.g. only v4 or v6 currently bound)
5179  */
5180 /*
5181  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5182  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5183  * types bound as its endpoint
5184  */
5185 int
5186 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5187 {
5188         struct sctp_inpcb *inp;
5189         int answer;
5190
5191         /*
5192          * No locks here, the TCB, in all cases is already locked and an
5193          * assoc is up. There is either a INP lock by the caller applied (in
5194          * asconf case when deleting an address) or NOT in the HB case,
5195          * however if HB then the INP increment is up and the INP will not
5196          * be removed (on top of the fact that we have a TCB lock). So we
5197          * only want to read the sctp_flags, which is either bound-all or
5198          * not.. no protection needed since once an assoc is up you can't be
5199          * changing your binding.
5200          */
5201         inp = stcb->sctp_ep;
5202         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5203                 /* if bound all, destination is not restricted */
5204                 /*
5205                  * RRS: Question during lock work: Is this correct? If you
5206                  * are bound-all you still might need to obey the V4--V6
5207                  * flags??? IMO this bound-all stuff needs to be removed!
5208                  */
5209                 return (1);
5210         }
5211         /* NOTE: all "scope" checks are done when local addresses are added */
5212         switch (destaddr->sa_family) {
5213 #ifdef INET6
5214         case AF_INET6:
5215                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5216                 break;
5217 #endif
5218 #ifdef INET
5219         case AF_INET:
5220                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5221                 break;
5222 #endif
5223         default:
5224                 /* invalid family, so it's unreachable */
5225                 answer = 0;
5226                 break;
5227         }
5228         return (answer);
5229 }
5230
5231 /*
5232  * update the inp_vflags on an endpoint
5233  */
5234 static void
5235 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5236 {
5237         struct sctp_laddr *laddr;
5238
5239         /* first clear the flag */
5240         inp->ip_inp.inp.inp_vflag = 0;
5241         /* set the flag based on addresses on the ep list */
5242         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5243                 if (laddr->ifa == NULL) {
5244                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5245                             __FUNCTION__);
5246                         continue;
5247                 }
5248                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5249                         continue;
5250                 }
5251                 switch (laddr->ifa->address.sa.sa_family) {
5252 #ifdef INET6
5253                 case AF_INET6:
5254                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5255                         break;
5256 #endif
5257 #ifdef INET
5258                 case AF_INET:
5259                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5260                         break;
5261 #endif
5262                 default:
5263                         break;
5264                 }
5265         }
5266 }
5267
5268 /*
5269  * Add the address to the endpoint local address list There is nothing to be
5270  * done if we are bound to all addresses
5271  */
5272 void
5273 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5274 {
5275         struct sctp_laddr *laddr;
5276         int fnd, error = 0;
5277
5278         fnd = 0;
5279
5280         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5281                 /* You are already bound to all. You have it already */
5282                 return;
5283         }
5284 #ifdef INET6
5285         if (ifa->address.sa.sa_family == AF_INET6) {
5286                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5287                         /* Can't bind a non-useable addr. */
5288                         return;
5289                 }
5290         }
5291 #endif
5292         /* first, is it already present? */
5293         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5294                 if (laddr->ifa == ifa) {
5295                         fnd = 1;
5296                         break;
5297                 }
5298         }
5299
5300         if (fnd == 0) {
5301                 /* Not in the ep list */
5302                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5303                 if (error != 0)
5304                         return;
5305                 inp->laddr_count++;
5306                 /* update inp_vflag flags */
5307                 switch (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         return;
5323 }
5324
5325
5326 /*
5327  * select a new (hopefully reachable) destination net (should only be used
5328  * when we deleted an ep addr that is the only usable source address to reach
5329  * the destination net)
5330  */
5331 static void
5332 sctp_select_primary_destination(struct sctp_tcb *stcb)
5333 {
5334         struct sctp_nets *net;
5335
5336         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5337                 /* for now, we'll just pick the first reachable one we find */
5338                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5339                         continue;
5340                 if (sctp_destination_is_reachable(stcb,
5341                     (struct sockaddr *)&net->ro._l_addr)) {
5342                         /* found a reachable destination */
5343                         stcb->asoc.primary_destination = net;
5344                 }
5345         }
5346         /* I can't there from here! ...we're gonna die shortly... */
5347 }
5348
5349
5350 /*
5351  * Delete the address from the endpoint local address list There is nothing
5352  * to be done if we are bound to all addresses
5353  */
5354 void
5355 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5356 {
5357         struct sctp_laddr *laddr;
5358         int fnd;
5359
5360         fnd = 0;
5361         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5362                 /* You are already bound to all. You have it already */
5363                 return;
5364         }
5365         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5366                 if (laddr->ifa == ifa) {
5367                         fnd = 1;
5368                         break;
5369                 }
5370         }
5371         if (fnd && (inp->laddr_count < 2)) {
5372                 /* can't delete unless there are at LEAST 2 addresses */
5373                 return;
5374         }
5375         if (fnd) {
5376                 /*
5377                  * clean up any use of this address go through our
5378                  * associations and clear any last_used_address that match
5379                  * this one for each assoc, see if a new primary_destination
5380                  * is needed
5381                  */
5382                 struct sctp_tcb *stcb;
5383
5384                 /* clean up "next_addr_touse" */
5385                 if (inp->next_addr_touse == laddr)
5386                         /* delete this address */
5387                         inp->next_addr_touse = NULL;
5388
5389                 /* clean up "last_used_address" */
5390                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5391                         struct sctp_nets *net;
5392
5393                         SCTP_TCB_LOCK(stcb);
5394                         if (stcb->asoc.last_used_address == laddr)
5395                                 /* delete this address */
5396                                 stcb->asoc.last_used_address = NULL;
5397                         /*
5398                          * Now spin through all the nets and purge any ref
5399                          * to laddr
5400                          */
5401                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5402                                 if (net->ro._s_addr &&
5403                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5404                                         /* Yep, purge src address selected */
5405                                         sctp_rtentry_t *rt;
5406
5407                                         /* delete this address if cached */
5408                                         rt = net->ro.ro_rt;
5409                                         if (rt != NULL) {
5410                                                 RTFREE(rt);
5411                                                 net->ro.ro_rt = NULL;
5412                                         }
5413                                         sctp_free_ifa(net->ro._s_addr);
5414                                         net->ro._s_addr = NULL;
5415                                         net->src_addr_selected = 0;
5416                                 }
5417                         }
5418                         SCTP_TCB_UNLOCK(stcb);
5419                 }               /* for each tcb */
5420                 /* remove it from the ep list */
5421                 sctp_remove_laddr(laddr);
5422                 inp->laddr_count--;
5423                 /* update inp_vflag flags */
5424                 sctp_update_ep_vflag(inp);
5425         }
5426         return;
5427 }
5428
5429 /*
5430  * Add the address to the TCB local address restricted list.
5431  * This is a "pending" address list (eg. addresses waiting for an
5432  * ASCONF-ACK response) and cannot be used as a valid source address.
5433  */
5434 void
5435 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5436 {
5437         struct sctp_laddr *laddr;
5438         struct sctpladdr *list;
5439
5440         /*
5441          * Assumes TCB is locked.. and possibly the INP. May need to
5442          * confirm/fix that if we need it and is not the case.
5443          */
5444         list = &stcb->asoc.sctp_restricted_addrs;
5445
5446 #ifdef INET6
5447         if (ifa->address.sa.sa_family == AF_INET6) {
5448                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5449                         /* Can't bind a non-existent addr. */
5450                         return;
5451                 }
5452         }
5453 #endif
5454         /* does the address already exist? */
5455         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5456                 if (laddr->ifa == ifa) {
5457                         return;
5458                 }
5459         }
5460
5461         /* add to the list */
5462         (void)sctp_insert_laddr(list, ifa, 0);
5463         return;
5464 }
5465
5466 /*
5467  * insert an laddr entry with the given ifa for the desired list
5468  */
5469 int
5470 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5471 {
5472         struct sctp_laddr *laddr;
5473
5474         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5475         if (laddr == NULL) {
5476                 /* out of memory? */
5477                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5478                 return (EINVAL);
5479         }
5480         SCTP_INCR_LADDR_COUNT();
5481         bzero(laddr, sizeof(*laddr));
5482         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5483         laddr->ifa = ifa;
5484         laddr->action = act;
5485         atomic_add_int(&ifa->refcount, 1);
5486         /* insert it */
5487         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5488
5489         return (0);
5490 }
5491
5492 /*
5493  * Remove an laddr entry from the local address list (on an assoc)
5494  */
5495 void
5496 sctp_remove_laddr(struct sctp_laddr *laddr)
5497 {
5498
5499         /* remove from the list */
5500         LIST_REMOVE(laddr, sctp_nxt_addr);
5501         sctp_free_ifa(laddr->ifa);
5502         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5503         SCTP_DECR_LADDR_COUNT();
5504 }
5505
5506 /*
5507  * Remove a local address from the TCB local address restricted list
5508  */
5509 void
5510 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5511 {
5512         struct sctp_inpcb *inp;
5513         struct sctp_laddr *laddr;
5514
5515         /*
5516          * This is called by asconf work. It is assumed that a) The TCB is
5517          * locked and b) The INP is locked. This is true in as much as I can
5518          * trace through the entry asconf code where I did these locks.
5519          * Again, the ASCONF code is a bit different in that it does lock
5520          * the INP during its work often times. This must be since we don't
5521          * want other proc's looking up things while what they are looking
5522          * up is changing :-D
5523          */
5524
5525         inp = stcb->sctp_ep;
5526         /* if subset bound and don't allow ASCONF's, can't delete last */
5527         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5528             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5529                 if (stcb->sctp_ep->laddr_count < 2) {
5530                         /* can't delete last address */
5531                         return;
5532                 }
5533         }
5534         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5535                 /* remove the address if it exists */
5536                 if (laddr->ifa == NULL)
5537                         continue;
5538                 if (laddr->ifa == ifa) {
5539                         sctp_remove_laddr(laddr);
5540                         return;
5541                 }
5542         }
5543
5544         /* address not found! */
5545         return;
5546 }
5547
5548 /*
5549  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5550  */
5551 /* sysctl */
5552 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5553 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5554
5555
5556
5557 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5558 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5559 int *sctp_cpuarry = NULL;
5560 void
5561 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5562 {
5563         /* Queue a packet to a processor for the specified core */
5564         struct sctp_mcore_queue *qent;
5565         struct sctp_mcore_ctrl *wkq;
5566         int need_wake = 0;
5567
5568         if (sctp_mcore_workers == NULL) {
5569                 /* Something went way bad during setup */
5570                 sctp_input_with_port(m, off, 0);
5571                 return;
5572         }
5573         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5574             (sizeof(struct sctp_mcore_queue)),
5575             SCTP_M_MCORE);
5576         if (qent == NULL) {
5577                 /* This is trouble  */
5578                 sctp_input_with_port(m, off, 0);
5579                 return;
5580         }
5581         qent->vn = curvnet;
5582         qent->m = m;
5583         qent->off = off;
5584         qent->v6 = 0;
5585         wkq = &sctp_mcore_workers[cpu_to_use];
5586         SCTP_MCORE_QLOCK(wkq);
5587
5588         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5589         if (wkq->running == 0) {
5590                 need_wake = 1;
5591         }
5592         SCTP_MCORE_QUNLOCK(wkq);
5593         if (need_wake) {
5594                 wakeup(&wkq->running);
5595         }
5596 }
5597
5598 static void
5599 sctp_mcore_thread(void *arg)
5600 {
5601
5602         struct sctp_mcore_ctrl *wkq;
5603         struct sctp_mcore_queue *qent;
5604
5605         wkq = (struct sctp_mcore_ctrl *)arg;
5606         struct mbuf *m;
5607         int off, v6;
5608
5609         /* Wait for first tickle */
5610         SCTP_MCORE_LOCK(wkq);
5611         wkq->running = 0;
5612         msleep(&wkq->running,
5613             &wkq->core_mtx,
5614             0, "wait for pkt", 0);
5615         SCTP_MCORE_UNLOCK(wkq);
5616
5617         /* Bind to our cpu */
5618         thread_lock(curthread);
5619         sched_bind(curthread, wkq->cpuid);
5620         thread_unlock(curthread);
5621
5622         /* Now lets start working */
5623         SCTP_MCORE_LOCK(wkq);
5624         /* Now grab lock and go */
5625         for (;;) {
5626                 SCTP_MCORE_QLOCK(wkq);
5627 skip_sleep:
5628                 wkq->running = 1;
5629                 qent = TAILQ_FIRST(&wkq->que);
5630                 if (qent) {
5631                         TAILQ_REMOVE(&wkq->que, qent, next);
5632                         SCTP_MCORE_QUNLOCK(wkq);
5633                         CURVNET_SET(qent->vn);
5634                         m = qent->m;
5635                         off = qent->off;
5636                         v6 = qent->v6;
5637                         SCTP_FREE(qent, SCTP_M_MCORE);
5638                         if (v6 == 0) {
5639                                 sctp_input_with_port(m, off, 0);
5640                         } else {
5641                                 SCTP_PRINTF("V6 not yet supported\n");
5642                                 sctp_m_freem(m);
5643                         }
5644                         CURVNET_RESTORE();
5645                         SCTP_MCORE_QLOCK(wkq);
5646                 }
5647                 wkq->running = 0;
5648                 if (!TAILQ_EMPTY(&wkq->que)) {
5649                         goto skip_sleep;
5650                 }
5651                 SCTP_MCORE_QUNLOCK(wkq);
5652                 msleep(&wkq->running,
5653                     &wkq->core_mtx,
5654                     0, "wait for pkt", 0);
5655         }
5656 }
5657
5658 static void
5659 sctp_startup_mcore_threads(void)
5660 {
5661         int i, cpu;
5662
5663         if (mp_ncpus == 1)
5664                 return;
5665
5666         if (sctp_mcore_workers != NULL) {
5667                 /*
5668                  * Already been here in some previous vnet?
5669                  */
5670                 return;
5671         }
5672         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5673             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5674             SCTP_M_MCORE);
5675         if (sctp_mcore_workers == NULL) {
5676                 /* TSNH I hope */
5677                 return;
5678         }
5679         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5680             sizeof(struct sctp_mcore_ctrl)));
5681         /* Init the structures */
5682         for (i = 0; i <= mp_maxid; i++) {
5683                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5684                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5685                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5686                 sctp_mcore_workers[i].cpuid = i;
5687         }
5688         if (sctp_cpuarry == NULL) {
5689                 SCTP_MALLOC(sctp_cpuarry, int *,
5690                     (mp_ncpus * sizeof(int)),
5691                     SCTP_M_MCORE);
5692                 i = 0;
5693                 CPU_FOREACH(cpu) {
5694                         sctp_cpuarry[i] = cpu;
5695                         i++;
5696                 }
5697         }
5698         /* Now start them all */
5699         CPU_FOREACH(cpu) {
5700                 (void)kproc_create(sctp_mcore_thread,
5701                     (void *)&sctp_mcore_workers[cpu],
5702                     &sctp_mcore_workers[cpu].thread_proc,
5703                     RFPROC,
5704                     SCTP_KTHREAD_PAGES,
5705                     SCTP_MCORE_NAME);
5706
5707         }
5708 }
5709
5710 #endif
5711
5712 void
5713 sctp_pcb_init()
5714 {
5715         /*
5716          * SCTP initialization for the PCB structures should be called by
5717          * the sctp_init() funciton.
5718          */
5719         int i;
5720         struct timeval tv;
5721
5722         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5723                 /* error I was called twice */
5724                 return;
5725         }
5726         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5727
5728 #if defined(SCTP_LOCAL_TRACE_BUF)
5729         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5730 #endif
5731 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5732         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5733             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5734             SCTP_M_MCORE);
5735 #endif
5736         (void)SCTP_GETTIME_TIMEVAL(&tv);
5737 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5738         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5739         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5740         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5741 #else
5742         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5743         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5744         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5745 #endif
5746         /* init the empty list of (All) Endpoints */
5747         LIST_INIT(&SCTP_BASE_INFO(listhead));
5748
5749
5750         /* init the hash table of endpoints */
5751         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5752         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5753         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5754         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5755             &SCTP_BASE_INFO(hashasocmark));
5756         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5757             &SCTP_BASE_INFO(hashmark));
5758         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5759             &SCTP_BASE_INFO(hashtcpmark));
5760         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5761
5762
5763         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5764             &SCTP_BASE_INFO(hashvrfmark));
5765
5766         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5767             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5768         /* init the zones */
5769         /*
5770          * FIX ME: Should check for NULL returns, but if it does fail we are
5771          * doomed to panic anyways... add later maybe.
5772          */
5773         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5774             sizeof(struct sctp_inpcb), maxsockets);
5775
5776         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5777             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5778
5779         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5780             sizeof(struct sctp_laddr),
5781             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5782
5783         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5784             sizeof(struct sctp_nets),
5785             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5786
5787         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5788             sizeof(struct sctp_tmit_chunk),
5789             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5790
5791         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5792             sizeof(struct sctp_queued_to_read),
5793             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5794
5795         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5796             sizeof(struct sctp_stream_queue_pending),
5797             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5798
5799         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5800             sizeof(struct sctp_asconf),
5801             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5802
5803         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5804             sizeof(struct sctp_asconf_ack),
5805             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5806
5807
5808         /* Master Lock INIT for info structure */
5809         SCTP_INP_INFO_LOCK_INIT();
5810         SCTP_STATLOG_INIT_LOCK();
5811
5812         SCTP_IPI_COUNT_INIT();
5813         SCTP_IPI_ADDR_INIT();
5814 #ifdef SCTP_PACKET_LOGGING
5815         SCTP_IP_PKTLOG_INIT();
5816 #endif
5817         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5818
5819         SCTP_WQ_ADDR_INIT();
5820         /* not sure if we need all the counts */
5821         SCTP_BASE_INFO(ipi_count_ep) = 0;
5822         /* assoc/tcb zone info */
5823         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5824         /* local addrlist zone info */
5825         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5826         /* remote addrlist zone info */
5827         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5828         /* chunk info */
5829         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5830
5831         /* socket queue zone info */
5832         SCTP_BASE_INFO(ipi_count_readq) = 0;
5833
5834         /* stream out queue cont */
5835         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5836
5837         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5838         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5839
5840         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5841
5842         /* Init the TIMEWAIT list */
5843         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5844                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5845         }
5846
5847         sctp_startup_iterator();
5848
5849 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5850         sctp_startup_mcore_threads();
5851 #endif
5852
5853         /*
5854          * INIT the default VRF which for BSD is the only one, other O/S's
5855          * may have more. But initially they must start with one and then
5856          * add the VRF's as addresses are added.
5857          */
5858         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5859 }
5860
5861 /*
5862  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5863  */
5864 void
5865 sctp_pcb_finish(void)
5866 {
5867         struct sctp_vrflist *vrf_bucket;
5868         struct sctp_vrf *vrf, *nvrf;
5869         struct sctp_ifn *ifn, *nifn;
5870         struct sctp_ifa *ifa, *nifa;
5871         struct sctpvtaghead *chain;
5872         struct sctp_tagblock *twait_block, *prev_twait_block;
5873         struct sctp_laddr *wi, *nwi;
5874         int i;
5875
5876         /*
5877          * Free BSD the it thread never exits but we do clean up. The only
5878          * way freebsd reaches here if we have VRF's but we still add the
5879          * ifdef to make it compile on old versions.
5880          */
5881         {
5882                 struct sctp_iterator *it, *nit;
5883
5884                 SCTP_IPI_ITERATOR_WQ_LOCK();
5885                 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5886                         if (it->vn != curvnet) {
5887                                 continue;
5888                         }
5889                         TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5890                         if (it->function_atend != NULL) {
5891                                 (*it->function_atend) (it->pointer, it->val);
5892                         }
5893                         SCTP_FREE(it, SCTP_M_ITER);
5894                 }
5895                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5896                 SCTP_ITERATOR_LOCK();
5897                 if ((sctp_it_ctl.cur_it) &&
5898                     (sctp_it_ctl.cur_it->vn == curvnet)) {
5899                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5900                 }
5901                 SCTP_ITERATOR_UNLOCK();
5902         }
5903
5904         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5905         SCTP_WQ_ADDR_LOCK();
5906         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5907                 LIST_REMOVE(wi, sctp_nxt_addr);
5908                 SCTP_DECR_LADDR_COUNT();
5909                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5910         }
5911         SCTP_WQ_ADDR_UNLOCK();
5912
5913         /*
5914          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5915          * destroyed first).
5916          */
5917         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5918         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5919                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5920                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5921                                 /* free the ifa */
5922                                 LIST_REMOVE(ifa, next_bucket);
5923                                 LIST_REMOVE(ifa, next_ifa);
5924                                 SCTP_FREE(ifa, SCTP_M_IFA);
5925                         }
5926                         /* free the ifn */
5927                         LIST_REMOVE(ifn, next_bucket);
5928                         LIST_REMOVE(ifn, next_ifn);
5929                         SCTP_FREE(ifn, SCTP_M_IFN);
5930                 }
5931                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5932                 /* free the vrf */
5933                 LIST_REMOVE(vrf, next_vrf);
5934                 SCTP_FREE(vrf, SCTP_M_VRF);
5935         }
5936         /* free the vrf hashes */
5937         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5938         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5939
5940         /*
5941          * free the TIMEWAIT list elements malloc'd in the function
5942          * sctp_add_vtag_to_timewait()...
5943          */
5944         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5945                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5946                 if (!LIST_EMPTY(chain)) {
5947                         prev_twait_block = NULL;
5948                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5949                                 if (prev_twait_block) {
5950                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5951                                 }
5952                                 prev_twait_block = twait_block;
5953                         }
5954                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5955                 }
5956         }
5957
5958         /* free the locks and mutexes */
5959 #ifdef SCTP_PACKET_LOGGING
5960         SCTP_IP_PKTLOG_DESTROY();
5961 #endif
5962         SCTP_IPI_ADDR_DESTROY();
5963         SCTP_STATLOG_DESTROY();
5964         SCTP_INP_INFO_LOCK_DESTROY();
5965
5966         SCTP_WQ_ADDR_DESTROY();
5967
5968         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5969         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5970         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5971         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5972         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5973         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5974         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5975         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5976         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5977         /* Get rid of other stuff to */
5978         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5979                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5980         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5981                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5982         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5983                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5984 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5985         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
5986 #endif
5987 }
5988
5989
5990 int
5991 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5992     int offset, int limit,
5993     struct sockaddr *src, struct sockaddr *dst,
5994     struct sockaddr *altsa)
5995 {
5996         /*
5997          * grub through the INIT pulling addresses and loading them to the
5998          * nets structure in the asoc. The from address in the mbuf should
5999          * also be loaded (if it is not already). This routine can be called
6000          * with either INIT or INIT-ACK's as long as the m points to the IP
6001          * packet and the offset points to the beginning of the parameters.
6002          */
6003         struct sctp_inpcb *inp;
6004         struct sctp_nets *net, *nnet, *net_tmp;
6005         struct sctp_paramhdr *phdr, parm_buf;
6006         struct sctp_tcb *stcb_tmp;
6007         uint16_t ptype, plen;
6008         struct sockaddr *sa;
6009         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6010         struct sctp_auth_random *p_random = NULL;
6011         uint16_t random_len = 0;
6012         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6013         struct sctp_auth_hmac_algo *hmacs = NULL;
6014         uint16_t hmacs_len = 0;
6015         uint8_t saw_asconf = 0;
6016         uint8_t saw_asconf_ack = 0;
6017         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6018         struct sctp_auth_chunk_list *chunks = NULL;
6019         uint16_t num_chunks = 0;
6020         sctp_key_t *new_key;
6021         uint32_t keylen;
6022         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6023         uint8_t ecn_allowed;
6024
6025 #ifdef INET
6026         struct sockaddr_in sin;
6027
6028 #endif
6029 #ifdef INET6
6030         struct sockaddr_in6 sin6;
6031
6032 #endif
6033
6034         /* First get the destination address setup too. */
6035 #ifdef INET
6036         memset(&sin, 0, sizeof(sin));
6037         sin.sin_family = AF_INET;
6038         sin.sin_len = sizeof(sin);
6039         sin.sin_port = stcb->rport;
6040 #endif
6041 #ifdef INET6
6042         memset(&sin6, 0, sizeof(sin6));
6043         sin6.sin6_family = AF_INET6;
6044         sin6.sin6_len = sizeof(struct sockaddr_in6);
6045         sin6.sin6_port = stcb->rport;
6046 #endif
6047         if (altsa) {
6048                 sa = altsa;
6049         } else {
6050                 sa = src;
6051         }
6052         /* Turn off ECN until we get through all params */
6053         ecn_allowed = 0;
6054         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6055                 /* mark all addresses that we have currently on the list */
6056                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6057         }
6058         /* does the source address already exist? if so skip it */
6059         inp = stcb->sctp_ep;
6060         atomic_add_int(&stcb->asoc.refcnt, 1);
6061         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6062         atomic_add_int(&stcb->asoc.refcnt, -1);
6063
6064         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6065                 /* we must add the source address */
6066                 /* no scope set here since we have a tcb already. */
6067                 switch (sa->sa_family) {
6068 #ifdef INET
6069                 case AF_INET:
6070                         if (stcb->asoc.scope.ipv4_addr_legal) {
6071                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6072                                         return (-1);
6073                                 }
6074                         }
6075                         break;
6076 #endif
6077 #ifdef INET6
6078                 case AF_INET6:
6079                         if (stcb->asoc.scope.ipv6_addr_legal) {
6080                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6081                                         return (-2);
6082                                 }
6083                         }
6084                         break;
6085 #endif
6086                 default:
6087                         break;
6088                 }
6089         } else {
6090                 if (net_tmp != NULL && stcb_tmp == stcb) {
6091                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6092                 } else if (stcb_tmp != stcb) {
6093                         /* It belongs to another association? */
6094                         if (stcb_tmp)
6095                                 SCTP_TCB_UNLOCK(stcb_tmp);
6096                         return (-3);
6097                 }
6098         }
6099         if (stcb->asoc.state == 0) {
6100                 /* the assoc was freed? */
6101                 return (-4);
6102         }
6103         /*
6104          * peer must explicitly turn this on. This may have been initialized
6105          * to be "on" in order to allow local addr changes while INIT's are
6106          * in flight.
6107          */
6108         stcb->asoc.peer_supports_asconf = 0;
6109         /* now we must go through each of the params. */
6110         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6111         while (phdr) {
6112                 ptype = ntohs(phdr->param_type);
6113                 plen = ntohs(phdr->param_length);
6114                 /*
6115                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6116                  * (uint32_t)ptype, (int)plen);
6117                  */
6118                 if (offset + plen > limit) {
6119                         break;
6120                 }
6121                 if (plen == 0) {
6122                         break;
6123                 }
6124 #ifdef INET
6125                 if (ptype == SCTP_IPV4_ADDRESS) {
6126                         if (stcb->asoc.scope.ipv4_addr_legal) {
6127                                 struct sctp_ipv4addr_param *p4, p4_buf;
6128
6129                                 /* ok get the v4 address and check/add */
6130                                 phdr = sctp_get_next_param(m, offset,
6131                                     (struct sctp_paramhdr *)&p4_buf,
6132                                     sizeof(p4_buf));
6133                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6134                                     phdr == NULL) {
6135                                         return (-5);
6136                                 }
6137                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6138                                 sin.sin_addr.s_addr = p4->addr;
6139                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6140                                         /* Skip multi-cast addresses */
6141                                         goto next_param;
6142                                 }
6143                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6144                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6145                                         goto next_param;
6146                                 }
6147                                 sa = (struct sockaddr *)&sin;
6148                                 inp = stcb->sctp_ep;
6149                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6150                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6151                                     dst, stcb);
6152                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6153
6154                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6155                                     inp == NULL) {
6156                                         /* we must add the source address */
6157                                         /*
6158                                          * no scope set since we have a tcb
6159                                          * already
6160                                          */
6161
6162                                         /*
6163                                          * we must validate the state again
6164                                          * here
6165                                          */
6166                         add_it_now:
6167                                         if (stcb->asoc.state == 0) {
6168                                                 /* the assoc was freed? */
6169                                                 return (-7);
6170                                         }
6171                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6172                                                 return (-8);
6173                                         }
6174                                 } else if (stcb_tmp == stcb) {
6175                                         if (stcb->asoc.state == 0) {
6176                                                 /* the assoc was freed? */
6177                                                 return (-10);
6178                                         }
6179                                         if (net != NULL) {
6180                                                 /* clear flag */
6181                                                 net->dest_state &=
6182                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6183                                         }
6184                                 } else {
6185                                         /*
6186                                          * strange, address is in another
6187                                          * assoc? straighten out locks.
6188                                          */
6189                                         if (stcb_tmp) {
6190                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6191                                                         /*
6192                                                          * in setup state we
6193                                                          * abort this guy
6194                                                          */
6195                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6196                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6197                                                         goto add_it_now;
6198                                                 }
6199                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6200                                         }
6201                                         if (stcb->asoc.state == 0) {
6202                                                 /* the assoc was freed? */
6203                                                 return (-12);
6204                                         }
6205                                         return (-13);
6206                                 }
6207                         }
6208                 } else
6209 #endif
6210 #ifdef INET6
6211                 if (ptype == SCTP_IPV6_ADDRESS) {
6212                         if (stcb->asoc.scope.ipv6_addr_legal) {
6213                                 /* ok get the v6 address and check/add */
6214                                 struct sctp_ipv6addr_param *p6, p6_buf;
6215
6216                                 phdr = sctp_get_next_param(m, offset,
6217                                     (struct sctp_paramhdr *)&p6_buf,
6218                                     sizeof(p6_buf));
6219                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6220                                     phdr == NULL) {
6221                                         return (-14);
6222                                 }
6223                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6224                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6225                                     sizeof(p6->addr));
6226                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6227                                         /* Skip multi-cast addresses */
6228                                         goto next_param;
6229                                 }
6230                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6231                                         /*
6232                                          * Link local make no sense without
6233                                          * scope
6234                                          */
6235                                         goto next_param;
6236                                 }
6237                                 sa = (struct sockaddr *)&sin6;
6238                                 inp = stcb->sctp_ep;
6239                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6240                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6241                                     dst, stcb);
6242                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6243                                 if (stcb_tmp == NULL &&
6244                                     (inp == stcb->sctp_ep || inp == NULL)) {
6245                                         /*
6246                                          * we must validate the state again
6247                                          * here
6248                                          */
6249                         add_it_now6:
6250                                         if (stcb->asoc.state == 0) {
6251                                                 /* the assoc was freed? */
6252                                                 return (-16);
6253                                         }
6254                                         /*
6255                                          * we must add the address, no scope
6256                                          * set
6257                                          */
6258                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6259                                                 return (-17);
6260                                         }
6261                                 } else if (stcb_tmp == stcb) {
6262                                         /*
6263                                          * we must validate the state again
6264                                          * here
6265                                          */
6266                                         if (stcb->asoc.state == 0) {
6267                                                 /* the assoc was freed? */
6268                                                 return (-19);
6269                                         }
6270                                         if (net != NULL) {
6271                                                 /* clear flag */
6272                                                 net->dest_state &=
6273                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6274                                         }
6275                                 } else {
6276                                         /*
6277                                          * strange, address is in another
6278                                          * assoc? straighten out locks.
6279                                          */
6280                                         if (stcb_tmp)
6281                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6282                                                         /*
6283                                                          * in setup state we
6284                                                          * abort this guy
6285                                                          */
6286                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6287                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6288                                                         goto add_it_now6;
6289                                                 }
6290                                         SCTP_TCB_UNLOCK(stcb_tmp);
6291
6292                                         if (stcb->asoc.state == 0) {
6293                                                 /* the assoc was freed? */
6294                                                 return (-21);
6295                                         }
6296                                         return (-22);
6297                                 }
6298                         }
6299                 } else
6300 #endif
6301                 if (ptype == SCTP_ECN_CAPABLE) {
6302                         ecn_allowed = 1;
6303                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6304                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6305                                 struct sctp_adaptation_layer_indication ai,
6306                                                                 *aip;
6307
6308                                 phdr = sctp_get_next_param(m, offset,
6309                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6310                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6311                                 if (aip) {
6312                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6313                                         stcb->asoc.adaptation_needed = 1;
6314                                 }
6315                         }
6316                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6317                         struct sctp_asconf_addr_param lstore, *fee;
6318                         int lptype;
6319                         struct sockaddr *lsa = NULL;
6320
6321 #ifdef INET
6322                         struct sctp_asconf_addrv4_param *fii;
6323
6324 #endif
6325
6326                         stcb->asoc.peer_supports_asconf = 1;
6327                         if (plen > sizeof(lstore)) {
6328                                 return (-23);
6329                         }
6330                         phdr = sctp_get_next_param(m, offset,
6331                             (struct sctp_paramhdr *)&lstore,
6332                             min(plen, sizeof(lstore)));
6333                         if (phdr == NULL) {
6334                                 return (-24);
6335                         }
6336                         fee = (struct sctp_asconf_addr_param *)phdr;
6337                         lptype = ntohs(fee->addrp.ph.param_type);
6338                         switch (lptype) {
6339 #ifdef INET
6340                         case SCTP_IPV4_ADDRESS:
6341                                 if (plen !=
6342                                     sizeof(struct sctp_asconf_addrv4_param)) {
6343                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6344                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6345                                             plen);
6346                                 } else {
6347                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6348                                         sin.sin_addr.s_addr = fii->addrp.addr;
6349                                         lsa = (struct sockaddr *)&sin;
6350                                 }
6351                                 break;
6352 #endif
6353 #ifdef INET6
6354                         case SCTP_IPV6_ADDRESS:
6355                                 if (plen !=
6356                                     sizeof(struct sctp_asconf_addr_param)) {
6357                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6358                                             (int)sizeof(struct sctp_asconf_addr_param),
6359                                             plen);
6360                                 } else {
6361                                         memcpy(sin6.sin6_addr.s6_addr,
6362                                             fee->addrp.addr,
6363                                             sizeof(fee->addrp.addr));
6364                                         lsa = (struct sockaddr *)&sin6;
6365                                 }
6366                                 break;
6367 #endif
6368                         default:
6369                                 break;
6370                         }
6371                         if (lsa) {
6372                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6373                         }
6374                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6375                         stcb->asoc.peer_supports_nat = 1;
6376                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6377                         /* Peer supports pr-sctp */
6378                         stcb->asoc.peer_supports_prsctp = 1;
6379                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6380                         /* A supported extension chunk */
6381                         struct sctp_supported_chunk_types_param *pr_supported;
6382                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6383                         int num_ent, i;
6384
6385                         phdr = sctp_get_next_param(m, offset,
6386                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6387                         if (phdr == NULL) {
6388                                 return (-25);
6389                         }
6390                         stcb->asoc.peer_supports_asconf = 0;
6391                         stcb->asoc.peer_supports_prsctp = 0;
6392                         stcb->asoc.peer_supports_pktdrop = 0;
6393                         stcb->asoc.peer_supports_strreset = 0;
6394                         stcb->asoc.peer_supports_nr_sack = 0;
6395                         stcb->asoc.peer_supports_auth = 0;
6396                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6397                         num_ent = plen - sizeof(struct sctp_paramhdr);
6398                         for (i = 0; i < num_ent; i++) {
6399                                 switch (pr_supported->chunk_types[i]) {
6400                                 case SCTP_ASCONF:
6401                                 case SCTP_ASCONF_ACK:
6402                                         stcb->asoc.peer_supports_asconf = 1;
6403                                         break;
6404                                 case SCTP_FORWARD_CUM_TSN:
6405                                         stcb->asoc.peer_supports_prsctp = 1;
6406                                         break;
6407                                 case SCTP_PACKET_DROPPED:
6408                                         stcb->asoc.peer_supports_pktdrop = 1;
6409                                         break;
6410                                 case SCTP_NR_SELECTIVE_ACK:
6411                                         stcb->asoc.peer_supports_nr_sack = 1;
6412                                         break;
6413                                 case SCTP_STREAM_RESET:
6414                                         stcb->asoc.peer_supports_strreset = 1;
6415                                         break;
6416                                 case SCTP_AUTHENTICATION:
6417                                         stcb->asoc.peer_supports_auth = 1;
6418                                         break;
6419                                 default:
6420                                         /* one I have not learned yet */
6421                                         break;
6422
6423                                 }
6424                         }
6425                 } else if (ptype == SCTP_RANDOM) {
6426                         if (plen > sizeof(random_store))
6427                                 break;
6428                         if (got_random) {
6429                                 /* already processed a RANDOM */
6430                                 goto next_param;
6431                         }
6432                         phdr = sctp_get_next_param(m, offset,
6433                             (struct sctp_paramhdr *)random_store,
6434                             min(sizeof(random_store), plen));
6435                         if (phdr == NULL)
6436                                 return (-26);
6437                         p_random = (struct sctp_auth_random *)phdr;
6438                         random_len = plen - sizeof(*p_random);
6439                         /* enforce the random length */
6440                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6441                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6442                                 return (-27);
6443                         }
6444                         got_random = 1;
6445                 } else if (ptype == SCTP_HMAC_LIST) {
6446                         int num_hmacs;
6447                         int i;
6448
6449                         if (plen > sizeof(hmacs_store))
6450                                 break;
6451                         if (got_hmacs) {
6452                                 /* already processed a HMAC list */
6453                                 goto next_param;
6454                         }
6455                         phdr = sctp_get_next_param(m, offset,
6456                             (struct sctp_paramhdr *)hmacs_store,
6457                             min(plen, sizeof(hmacs_store)));
6458                         if (phdr == NULL)
6459                                 return (-28);
6460                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6461                         hmacs_len = plen - sizeof(*hmacs);
6462                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6463                         /* validate the hmac list */
6464                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6465                                 return (-29);
6466                         }
6467                         if (stcb->asoc.peer_hmacs != NULL)
6468                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6469                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6470                         if (stcb->asoc.peer_hmacs != NULL) {
6471                                 for (i = 0; i < num_hmacs; i++) {
6472                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6473                                             ntohs(hmacs->hmac_ids[i]));
6474                                 }
6475                         }
6476                         got_hmacs = 1;
6477                 } else if (ptype == SCTP_CHUNK_LIST) {
6478                         int i;
6479
6480                         if (plen > sizeof(chunks_store))
6481                                 break;
6482                         if (got_chklist) {
6483                                 /* already processed a Chunks list */
6484                                 goto next_param;
6485                         }
6486                         phdr = sctp_get_next_param(m, offset,
6487                             (struct sctp_paramhdr *)chunks_store,
6488                             min(plen, sizeof(chunks_store)));
6489                         if (phdr == NULL)
6490                                 return (-30);
6491                         chunks = (struct sctp_auth_chunk_list *)phdr;
6492                         num_chunks = plen - sizeof(*chunks);
6493                         if (stcb->asoc.peer_auth_chunks != NULL)
6494                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6495                         else
6496                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6497                         for (i = 0; i < num_chunks; i++) {
6498                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6499                                     stcb->asoc.peer_auth_chunks);
6500                                 /* record asconf/asconf-ack if listed */
6501                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6502                                         saw_asconf = 1;
6503                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6504                                         saw_asconf_ack = 1;
6505
6506                         }
6507                         got_chklist = 1;
6508                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6509                             (ptype == SCTP_STATE_COOKIE) ||
6510                             (ptype == SCTP_UNRECOG_PARAM) ||
6511                             (ptype == SCTP_COOKIE_PRESERVE) ||
6512                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6513                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6514                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6515                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6516                     (ptype == SCTP_SUCCESS_REPORT)) {
6517                          /* don't care */ ;
6518                 } else {
6519                         if ((ptype & 0x8000) == 0x0000) {
6520                                 /*
6521                                  * must stop processing the rest of the
6522                                  * param's. Any report bits were handled
6523                                  * with the call to
6524                                  * sctp_arethere_unrecognized_parameters()
6525                                  * when the INIT or INIT-ACK was first seen.
6526                                  */
6527                                 break;
6528                         }
6529                 }
6530
6531 next_param:
6532                 offset += SCTP_SIZE32(plen);
6533                 if (offset >= limit) {
6534                         break;
6535                 }
6536                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6537                     sizeof(parm_buf));
6538         }
6539         /* Now check to see if we need to purge any addresses */
6540         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6541                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6542                     SCTP_ADDR_NOT_IN_ASSOC) {
6543                         /* This address has been removed from the asoc */
6544                         /* remove and free it */
6545                         stcb->asoc.numnets--;
6546                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6547                         sctp_free_remote_addr(net);
6548                         if (net == stcb->asoc.primary_destination) {
6549                                 stcb->asoc.primary_destination = NULL;
6550                                 sctp_select_primary_destination(stcb);
6551                         }
6552                 }
6553         }
6554         if (ecn_allowed == 0) {
6555                 stcb->asoc.ecn_allowed = 0;
6556         }
6557         /* validate authentication required parameters */
6558         if (got_random && got_hmacs) {
6559                 stcb->asoc.peer_supports_auth = 1;
6560         } else {
6561                 stcb->asoc.peer_supports_auth = 0;
6562         }
6563         if (!stcb->asoc.peer_supports_auth && got_chklist) {
6564                 /* peer does not support auth but sent a chunks list? */
6565                 return (-31);
6566         }
6567         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6568             !stcb->asoc.peer_supports_auth) {
6569                 /* peer supports asconf but not auth? */
6570                 return (-32);
6571         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6572             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6573                 return (-33);
6574         }
6575         /* concatenate the full random key */
6576         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6577         if (chunks != NULL) {
6578                 keylen += sizeof(*chunks) + num_chunks;
6579         }
6580         new_key = sctp_alloc_key(keylen);
6581         if (new_key != NULL) {
6582                 /* copy in the RANDOM */
6583                 if (p_random != NULL) {
6584                         keylen = sizeof(*p_random) + random_len;
6585                         bcopy(p_random, new_key->key, keylen);
6586                 }
6587                 /* append in the AUTH chunks */
6588                 if (chunks != NULL) {
6589                         bcopy(chunks, new_key->key + keylen,
6590                             sizeof(*chunks) + num_chunks);
6591                         keylen += sizeof(*chunks) + num_chunks;
6592                 }
6593                 /* append in the HMACs */
6594                 if (hmacs != NULL) {
6595                         bcopy(hmacs, new_key->key + keylen,
6596                             sizeof(*hmacs) + hmacs_len);
6597                 }
6598         } else {
6599                 /* failed to get memory for the key */
6600                 return (-34);
6601         }
6602         if (stcb->asoc.authinfo.peer_random != NULL)
6603                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6604         stcb->asoc.authinfo.peer_random = new_key;
6605         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6606         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6607
6608         return (0);
6609 }
6610
6611 int
6612 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6613     struct sctp_nets *net)
6614 {
6615         /* make sure the requested primary address exists in the assoc */
6616         if (net == NULL && sa)
6617                 net = sctp_findnet(stcb, sa);
6618
6619         if (net == NULL) {
6620                 /* didn't find the requested primary address! */
6621                 return (-1);
6622         } else {
6623                 /* set the primary address */
6624                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6625                         /* Must be confirmed, so queue to set */
6626                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6627                         return (0);
6628                 }
6629                 stcb->asoc.primary_destination = net;
6630                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6631                         sctp_free_remote_addr(stcb->asoc.alternate);
6632                         stcb->asoc.alternate = NULL;
6633                 }
6634                 net = TAILQ_FIRST(&stcb->asoc.nets);
6635                 if (net != stcb->asoc.primary_destination) {
6636                         /*
6637                          * first one on the list is NOT the primary
6638                          * sctp_cmpaddr() is much more efficient if the
6639                          * primary is the first on the list, make it so.
6640                          */
6641                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6642                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6643                 }
6644                 return (0);
6645         }
6646 }
6647
6648 int
6649 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6650 {
6651         /*
6652          * This function serves two purposes. It will see if a TAG can be
6653          * re-used and return 1 for yes it is ok and 0 for don't use that
6654          * tag. A secondary function it will do is purge out old tags that
6655          * can be removed.
6656          */
6657         struct sctpvtaghead *chain;
6658         struct sctp_tagblock *twait_block;
6659         struct sctpasochead *head;
6660         struct sctp_tcb *stcb;
6661         int i;
6662
6663         SCTP_INP_INFO_RLOCK();
6664         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6665             SCTP_BASE_INFO(hashasocmark))];
6666         if (head == NULL) {
6667                 /* invalid vtag */
6668                 goto skip_vtag_check;
6669         }
6670         LIST_FOREACH(stcb, head, sctp_asocs) {
6671                 /*
6672                  * We choose not to lock anything here. TCB's can't be
6673                  * removed since we have the read lock, so they can't be
6674                  * freed on us, same thing for the INP. I may be wrong with
6675                  * this assumption, but we will go with it for now :-)
6676                  */
6677                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6678                         continue;
6679                 }
6680                 if (stcb->asoc.my_vtag == tag) {
6681                         /* candidate */
6682                         if (stcb->rport != rport) {
6683                                 continue;
6684                         }
6685                         if (stcb->sctp_ep->sctp_lport != lport) {
6686                                 continue;
6687                         }
6688                         /* Its a used tag set */
6689                         SCTP_INP_INFO_RUNLOCK();
6690                         return (0);
6691                 }
6692         }
6693 skip_vtag_check:
6694
6695         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6696         /* Now what about timed wait ? */
6697         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6698                 /*
6699                  * Block(s) are present, lets see if we have this tag in the
6700                  * list
6701                  */
6702                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6703                         if (twait_block->vtag_block[i].v_tag == 0) {
6704                                 /* not used */
6705                                 continue;
6706                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6707                             now->tv_sec) {
6708                                 /* Audit expires this guy */
6709                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6710                                 twait_block->vtag_block[i].v_tag = 0;
6711                                 twait_block->vtag_block[i].lport = 0;
6712                                 twait_block->vtag_block[i].rport = 0;
6713                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6714                                     (twait_block->vtag_block[i].lport == lport) &&
6715                             (twait_block->vtag_block[i].rport == rport)) {
6716                                 /* Bad tag, sorry :< */
6717                                 SCTP_INP_INFO_RUNLOCK();
6718                                 return (0);
6719                         }
6720                 }
6721         }
6722         SCTP_INP_INFO_RUNLOCK();
6723         return (1);
6724 }
6725
6726 static void
6727 sctp_drain_mbufs(struct sctp_tcb *stcb)
6728 {
6729         /*
6730          * We must hunt this association for MBUF's past the cumack (i.e.
6731          * out of order data that we can renege on).
6732          */
6733         struct sctp_association *asoc;
6734         struct sctp_tmit_chunk *chk, *nchk;
6735         uint32_t cumulative_tsn_p1;
6736         struct sctp_queued_to_read *ctl, *nctl;
6737         int cnt, strmat;
6738         uint32_t gap, i;
6739         int fnd = 0;
6740
6741         /* We look for anything larger than the cum-ack + 1 */
6742
6743         asoc = &stcb->asoc;
6744         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6745                 /* none we can reneg on. */
6746                 return;
6747         }
6748         SCTP_STAT_INCR(sctps_protocol_drains_done);
6749         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6750         cnt = 0;
6751         /* First look in the re-assembly queue */
6752         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6753                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6754                         /* Yep it is above cum-ack */
6755                         cnt++;
6756                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6757                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6758                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6759                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6760                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6761                         if (chk->data) {
6762                                 sctp_m_freem(chk->data);
6763                                 chk->data = NULL;
6764                         }
6765                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6766                 }
6767         }
6768         /* Ok that was fun, now we will drain all the inbound streams? */
6769         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6770                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6771                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6772                                 /* Yep it is above cum-ack */
6773                                 cnt++;
6774                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6775                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6776                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6777                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6778                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6779                                 if (ctl->data) {
6780                                         sctp_m_freem(ctl->data);
6781                                         ctl->data = NULL;
6782                                 }
6783                                 sctp_free_remote_addr(ctl->whoFrom);
6784                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6785                                 SCTP_DECR_READQ_COUNT();
6786                         }
6787                 }
6788         }
6789         if (cnt) {
6790                 /* We must back down to see what the new highest is */
6791                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6792                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6793                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6794                                 asoc->highest_tsn_inside_map = i;
6795                                 fnd = 1;
6796                                 break;
6797                         }
6798                 }
6799                 if (!fnd) {
6800                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6801                 }
6802                 /*
6803                  * Question, should we go through the delivery queue? The
6804                  * only reason things are on here is the app not reading OR
6805                  * a p-d-api up. An attacker COULD send enough in to
6806                  * initiate the PD-API and then send a bunch of stuff to
6807                  * other streams... these would wind up on the delivery
6808                  * queue.. and then we would not get to them. But in order
6809                  * to do this I then have to back-track and un-deliver
6810                  * sequence numbers in streams.. el-yucko. I think for now
6811                  * we will NOT look at the delivery queue and leave it to be
6812                  * something to consider later. An alternative would be to
6813                  * abort the P-D-API with a notification and then deliver
6814                  * the data.... Or another method might be to keep track of
6815                  * how many times the situation occurs and if we see a
6816                  * possible attack underway just abort the association.
6817                  */
6818 #ifdef SCTP_DEBUG
6819                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6820 #endif
6821                 /*
6822                  * Now do we need to find a new
6823                  * asoc->highest_tsn_inside_map?
6824                  */
6825                 asoc->last_revoke_count = cnt;
6826                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6827                 /* sa_ignore NO_NULL_CHK */
6828                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6829                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6830         }
6831         /*
6832          * Another issue, in un-setting the TSN's in the mapping array we
6833          * DID NOT adjust the highest_tsn marker.  This will cause one of
6834          * two things to occur. It may cause us to do extra work in checking
6835          * for our mapping array movement. More importantly it may cause us
6836          * to SACK every datagram. This may not be a bad thing though since
6837          * we will recover once we get our cum-ack above and all this stuff
6838          * we dumped recovered.
6839          */
6840 }
6841
6842 void
6843 sctp_drain()
6844 {
6845         /*
6846          * We must walk the PCB lists for ALL associations here. The system
6847          * is LOW on MBUF's and needs help. This is where reneging will
6848          * occur. We really hope this does NOT happen!
6849          */
6850         VNET_ITERATOR_DECL(vnet_iter);
6851         VNET_LIST_RLOCK_NOSLEEP();
6852         VNET_FOREACH(vnet_iter) {
6853                 CURVNET_SET(vnet_iter);
6854                 struct sctp_inpcb *inp;
6855                 struct sctp_tcb *stcb;
6856
6857                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6858                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6859 #ifdef VIMAGE
6860                         continue;
6861 #else
6862                         return;
6863 #endif
6864                 }
6865                 SCTP_INP_INFO_RLOCK();
6866                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6867                         /* For each endpoint */
6868                         SCTP_INP_RLOCK(inp);
6869                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6870                                 /* For each association */
6871                                 SCTP_TCB_LOCK(stcb);
6872                                 sctp_drain_mbufs(stcb);
6873                                 SCTP_TCB_UNLOCK(stcb);
6874                         }
6875                         SCTP_INP_RUNLOCK(inp);
6876                 }
6877                 SCTP_INP_INFO_RUNLOCK();
6878                 CURVNET_RESTORE();
6879         }
6880         VNET_LIST_RUNLOCK_NOSLEEP();
6881 }
6882
6883 /*
6884  * start a new iterator
6885  * iterates through all endpoints and associations based on the pcb_state
6886  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6887  * assocs and "ef" (optional) is executed when the iterator completes.
6888  * "inpf" (optional) is executed for each new endpoint as it is being
6889  * iterated through. inpe (optional) is called when the inp completes
6890  * its way through all the stcbs.
6891  */
6892 int
6893 sctp_initiate_iterator(inp_func inpf,
6894     asoc_func af,
6895     inp_func inpe,
6896     uint32_t pcb_state,
6897     uint32_t pcb_features,
6898     uint32_t asoc_state,
6899     void *argp,
6900     uint32_t argi,
6901     end_func ef,
6902     struct sctp_inpcb *s_inp,
6903     uint8_t chunk_output_off)
6904 {
6905         struct sctp_iterator *it = NULL;
6906
6907         if (af == NULL) {
6908                 return (-1);
6909         }
6910         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6911             SCTP_M_ITER);
6912         if (it == NULL) {
6913                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6914                 return (ENOMEM);
6915         }
6916         memset(it, 0, sizeof(*it));
6917         it->function_assoc = af;
6918         it->function_inp = inpf;
6919         if (inpf)
6920                 it->done_current_ep = 0;
6921         else
6922                 it->done_current_ep = 1;
6923         it->function_atend = ef;
6924         it->pointer = argp;
6925         it->val = argi;
6926         it->pcb_flags = pcb_state;
6927         it->pcb_features = pcb_features;
6928         it->asoc_state = asoc_state;
6929         it->function_inp_end = inpe;
6930         it->no_chunk_output = chunk_output_off;
6931         it->vn = curvnet;
6932         if (s_inp) {
6933                 /* Assume lock is held here */
6934                 it->inp = s_inp;
6935                 SCTP_INP_INCR_REF(it->inp);
6936                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
6937         } else {
6938                 SCTP_INP_INFO_RLOCK();
6939                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
6940                 if (it->inp) {
6941                         SCTP_INP_INCR_REF(it->inp);
6942                 }
6943                 SCTP_INP_INFO_RUNLOCK();
6944                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
6945
6946         }
6947         SCTP_IPI_ITERATOR_WQ_LOCK();
6948
6949         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
6950         if (sctp_it_ctl.iterator_running == 0) {
6951                 sctp_wakeup_iterator();
6952         }
6953         SCTP_IPI_ITERATOR_WQ_UNLOCK();
6954         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
6955         return (0);
6956 }