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;
 831
 832 #if defined(INET)
 833         int ipv4_local_scope, ipv4_addr_legal;
 834
 835 #endif
 836 #if defined(INET6)
 837         int local_scope, site_scope, ipv6_addr_legal;
 838
 839 #endif
 840         struct sctp_vrf *vrf;
 841         struct sctp_ifn *sctp_ifn;
 842         struct sctp_ifa *sctp_ifa;
 843
 844         loopback_scope = stcb->asoc.scope.loopback_scope;
 845 #if defined(INET)
 846         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
 847         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
 848 #endif
 849 #if defined(INET6)
 850         local_scope = stcb->asoc.scope.local_scope;
 851         site_scope = stcb->asoc.scope.site_scope;
 852         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
 853 #endif
 854
 855         SCTP_IPI_ADDR_RLOCK();
 856         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
 857         if (vrf == NULL) {
 858                 /* no vrf, no addresses */
 859                 SCTP_IPI_ADDR_RUNLOCK();
 860                 return (0);
 861         }
 862         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 863                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 864                         if ((loopback_scope == 0) &&
 865                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 866                                 continue;
 867                         }
 868                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 869                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
 870                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
 871                                         /*
 872                                          * We allow pending addresses, where
 873                                          * we have sent an asconf-add to be
 874                                          * considered valid.
 875                                          */
 876                                         continue;
 877                                 }
 878                                 switch (sctp_ifa->address.sa.sa_family) {
 879 #ifdef INET
 880                                 case AF_INET:
 881                                         if (ipv4_addr_legal) {
 882                                                 struct sockaddr_in *sin,
 883                                                            *rsin;
 884
 885                                                 sin = &sctp_ifa->address.sin;
 886                                                 rsin = (struct sockaddr_in *)to;
 887                                                 if ((ipv4_local_scope == 0) &&
 888                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 889                                                         continue;
 890                                                 }
 891                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 892                                                         SCTP_IPI_ADDR_RUNLOCK();
 893                                                         return (1);
 894                                                 }
 895                                         }
 896                                         break;
 897 #endif
 898 #ifdef INET6
 899                                 case AF_INET6:
 900                                         if (ipv6_addr_legal) {
 901                                                 struct sockaddr_in6 *sin6,
 902                                                             *rsin6;
 903
 904                                                 sin6 = &sctp_ifa->address.sin6;
 905                                                 rsin6 = (struct sockaddr_in6 *)to;
 906                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 907                                                         if (local_scope == 0)
 908                                                                 continue;
 909                                                         if (sin6->sin6_scope_id == 0) {
 910                                                                 if (sa6_recoverscope(sin6) != 0)
 911                                                                         continue;
 912                                                         }
 913                                                 }
 914                                                 if ((site_scope == 0) &&
 915                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
 916                                                         continue;
 917                                                 }
 918                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 919                                                         SCTP_IPI_ADDR_RUNLOCK();
 920                                                         return (1);
 921                                                 }
 922                                         }
 923                                         break;
 924 #endif
 925                                 default:
 926                                         /* TSNH */
 927                                         break;
 928                                 }
 929                         }
 930                 }
 931         } else {
 932                 struct sctp_laddr *laddr;
 933
 934                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
 935                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 936                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 937                                 continue;
 938                         }
 939                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
 940                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
 941                                 /*
 942                                  * We allow pending addresses, where we have
 943                                  * sent an asconf-add to be considered
 944                                  * valid.
 945                                  */
 946                                 continue;
 947                         }
 948                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
 949                                 continue;
 950                         }
 951                         switch (to->sa_family) {
 952 #ifdef INET
 953                         case AF_INET:
 954                                 {
 955                                         struct sockaddr_in *sin, *rsin;
 956
 957                                         sin = (struct sockaddr_in *)&laddr->ifa->address.sin;
 958                                         rsin = (struct sockaddr_in *)to;
 959                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 960                                                 SCTP_IPI_ADDR_RUNLOCK();
 961                                                 return (1);
 962                                         }
 963                                         break;
 964                                 }
 965 #endif
 966 #ifdef INET6
 967                         case AF_INET6:
 968                                 {
 969                                         struct sockaddr_in6 *sin6, *rsin6;
 970
 971                                         sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6;
 972                                         rsin6 = (struct sockaddr_in6 *)to;
 973                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 974                                                 SCTP_IPI_ADDR_RUNLOCK();
 975                                                 return (1);
 976                                         }
 977                                         break;
 978                                 }
 979
 980 #endif
 981                         default:
 982                                 /* TSNH */
 983                                 break;
 984                         }
 985
 986                 }
 987         }
 988         SCTP_IPI_ADDR_RUNLOCK();
 989         return (0);
 990 }
 991
 992
 993 static struct sctp_tcb *
 994 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 995     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
 996 {
 997         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
 998         /*
 999          * If we support the TCP model, then we must now dig through to see
1000          * if we can find our endpoint in the list of tcp ep's.
1001          */
1002         uint16_t lport, rport;
1003         struct sctppcbhead *ephead;
1004         struct sctp_inpcb *inp;
1005         struct sctp_laddr *laddr;
1006         struct sctp_tcb *stcb;
1007         struct sctp_nets *net;
1008
1009         if ((to == NULL) || (from == NULL)) {
1010                 return (NULL);
1011         }
1012         switch (to->sa_family) {
1013 #ifdef INET
1014         case AF_INET:
1015                 if (from->sa_family == AF_INET) {
1016                         lport = ((struct sockaddr_in *)to)->sin_port;
1017                         rport = ((struct sockaddr_in *)from)->sin_port;
1018                 } else {
1019                         return (NULL);
1020                 }
1021                 break;
1022 #endif
1023 #ifdef INET6
1024         case AF_INET6:
1025                 if (from->sa_family == AF_INET6) {
1026                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
1027                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
1028                 } else {
1029                         return (NULL);
1030                 }
1031                 break;
1032 #endif
1033         default:
1034                 return (NULL);
1035         }
1036         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1037         /*
1038          * Ok now for each of the guys in this bucket we must look and see:
1039          * - Does the remote port match. - Does there single association's
1040          * addresses match this address (to). If so we update p_ep to point
1041          * to this ep and return the tcb from it.
1042          */
1043         LIST_FOREACH(inp, ephead, sctp_hash) {
1044                 SCTP_INP_RLOCK(inp);
1045                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1046                         SCTP_INP_RUNLOCK(inp);
1047                         continue;
1048                 }
1049                 if (lport != inp->sctp_lport) {
1050                         SCTP_INP_RUNLOCK(inp);
1051                         continue;
1052                 }
1053                 if (inp->def_vrf_id != vrf_id) {
1054                         SCTP_INP_RUNLOCK(inp);
1055                         continue;
1056                 }
1057                 /* check to see if the ep has one of the addresses */
1058                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1059                         /* We are NOT bound all, so look further */
1060                         int match = 0;
1061
1062                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1063
1064                                 if (laddr->ifa == NULL) {
1065                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
1066                                         continue;
1067                                 }
1068                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1069                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1070                                         continue;
1071                                 }
1072                                 if (laddr->ifa->address.sa.sa_family ==
1073                                     to->sa_family) {
1074                                         /* see if it matches */
1075 #ifdef INET
1076                                         if (from->sa_family == AF_INET) {
1077                                                 struct sockaddr_in *intf_addr,
1078                                                            *sin;
1079
1080                                                 intf_addr = &laddr->ifa->address.sin;
1081                                                 sin = (struct sockaddr_in *)to;
1082                                                 if (sin->sin_addr.s_addr ==
1083                                                     intf_addr->sin_addr.s_addr) {
1084                                                         match = 1;
1085                                                         break;
1086                                                 }
1087                                         }
1088 #endif
1089 #ifdef INET6
1090                                         if (from->sa_family == AF_INET6) {
1091                                                 struct sockaddr_in6 *intf_addr6;
1092                                                 struct sockaddr_in6 *sin6;
1093
1094                                                 sin6 = (struct sockaddr_in6 *)
1095                                                     to;
1096                                                 intf_addr6 = &laddr->ifa->address.sin6;
1097
1098                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1099                                                     intf_addr6)) {
1100                                                         match = 1;
1101                                                         break;
1102                                                 }
1103                                         }
1104 #endif
1105                                 }
1106                         }
1107                         if (match == 0) {
1108                                 /* This endpoint does not have this address */
1109                                 SCTP_INP_RUNLOCK(inp);
1110                                 continue;
1111                         }
1112                 }
1113                 /*
1114                  * Ok if we hit here the ep has the address, does it hold
1115                  * the tcb?
1116                  */
1117                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1118                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1119                 if (stcb == NULL) {
1120                         SCTP_INP_RUNLOCK(inp);
1121                         continue;
1122                 }
1123                 SCTP_TCB_LOCK(stcb);
1124                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1125                         SCTP_TCB_UNLOCK(stcb);
1126                         SCTP_INP_RUNLOCK(inp);
1127                         continue;
1128                 }
1129                 if (stcb->rport != rport) {
1130                         /* remote port does not match. */
1131                         SCTP_TCB_UNLOCK(stcb);
1132                         SCTP_INP_RUNLOCK(inp);
1133                         continue;
1134                 }
1135                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1136                         SCTP_TCB_UNLOCK(stcb);
1137                         SCTP_INP_RUNLOCK(inp);
1138                         continue;
1139                 }
1140                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1141                         SCTP_TCB_UNLOCK(stcb);
1142                         SCTP_INP_RUNLOCK(inp);
1143                         continue;
1144                 }
1145                 /* Does this TCB have a matching address? */
1146                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1147
1148                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1149                                 /* not the same family, can't be a match */
1150                                 continue;
1151                         }
1152                         switch (from->sa_family) {
1153 #ifdef INET
1154                         case AF_INET:
1155                                 {
1156                                         struct sockaddr_in *sin, *rsin;
1157
1158                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
1159                                         rsin = (struct sockaddr_in *)from;
1160                                         if (sin->sin_addr.s_addr ==
1161                                             rsin->sin_addr.s_addr) {
1162                                                 /* found it */
1163                                                 if (netp != NULL) {
1164                                                         *netp = net;
1165                                                 }
1166                                                 /*
1167                                                  * Update the endpoint
1168                                                  * pointer
1169                                                  */
1170                                                 *inp_p = inp;
1171                                                 SCTP_INP_RUNLOCK(inp);
1172                                                 return (stcb);
1173                                         }
1174                                         break;
1175                                 }
1176 #endif
1177 #ifdef INET6
1178                         case AF_INET6:
1179                                 {
1180                                         struct sockaddr_in6 *sin6, *rsin6;
1181
1182                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1183                                         rsin6 = (struct sockaddr_in6 *)from;
1184                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1185                                             rsin6)) {
1186                                                 /* found it */
1187                                                 if (netp != NULL) {
1188                                                         *netp = net;
1189                                                 }
1190                                                 /*
1191                                                  * Update the endpoint
1192                                                  * pointer
1193                                                  */
1194                                                 *inp_p = inp;
1195                                                 SCTP_INP_RUNLOCK(inp);
1196                                                 return (stcb);
1197                                         }
1198                                         break;
1199                                 }
1200 #endif
1201                         default:
1202                                 /* TSNH */
1203                                 break;
1204                         }
1205                 }
1206                 SCTP_TCB_UNLOCK(stcb);
1207                 SCTP_INP_RUNLOCK(inp);
1208         }
1209         return (NULL);
1210 }
1211
1212
1213 /*
1214  * rules for use
1215  *
1216  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1217  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1218  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1219  * NULL.
1220  */
1221
1222 struct sctp_tcb *
1223 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1224     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1225 {
1226         struct sctpasochead *head;
1227         struct sctp_inpcb *inp;
1228         struct sctp_tcb *stcb = NULL;
1229         struct sctp_nets *net;
1230         uint16_t rport;
1231
1232         inp = *inp_p;
1233         switch (remote->sa_family) {
1234 #ifdef INET
1235         case AF_INET:
1236                 rport = (((struct sockaddr_in *)remote)->sin_port);
1237                 break;
1238 #endif
1239 #ifdef INET6
1240         case AF_INET6:
1241                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1242                 break;
1243 #endif
1244         default:
1245                 return (NULL);
1246         }
1247         if (locked_tcb) {
1248                 /*
1249                  * UN-lock so we can do proper locking here this occurs when
1250                  * called from load_addresses_from_init.
1251                  */
1252                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1253                 SCTP_TCB_UNLOCK(locked_tcb);
1254         }
1255         SCTP_INP_INFO_RLOCK();
1256         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1257             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1258                 /*-
1259                  * Now either this guy is our listener or it's the
1260                  * connector. If it is the one that issued the connect, then
1261                  * it's only chance is to be the first TCB in the list. If
1262                  * it is the acceptor, then do the special_lookup to hash
1263                  * and find the real inp.
1264                  */
1265                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1266                         /* to is peer addr, from is my addr */
1267                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1268                             netp, inp->def_vrf_id);
1269                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1270                                 /* we have a locked tcb, lower refcount */
1271                                 SCTP_INP_DECR_REF(inp);
1272                         }
1273                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1274                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1275                                 SCTP_TCB_LOCK(locked_tcb);
1276                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1277                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1278                         }
1279                         SCTP_INP_INFO_RUNLOCK();
1280                         return (stcb);
1281                 } else {
1282                         SCTP_INP_WLOCK(inp);
1283                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1284                                 goto null_return;
1285                         }
1286                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1287                         if (stcb == NULL) {
1288                                 goto null_return;
1289                         }
1290                         SCTP_TCB_LOCK(stcb);
1291
1292                         if (stcb->rport != rport) {
1293                                 /* remote port does not match. */
1294                                 SCTP_TCB_UNLOCK(stcb);
1295                                 goto null_return;
1296                         }
1297                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1298                                 SCTP_TCB_UNLOCK(stcb);
1299                                 goto null_return;
1300                         }
1301                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1302                                 SCTP_TCB_UNLOCK(stcb);
1303                                 goto null_return;
1304                         }
1305                         /* now look at the list of remote addresses */
1306                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1307 #ifdef INVARIANTS
1308                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1309                                         panic("Corrupt net list");
1310                                 }
1311 #endif
1312                                 if (net->ro._l_addr.sa.sa_family !=
1313                                     remote->sa_family) {
1314                                         /* not the same family */
1315                                         continue;
1316                                 }
1317                                 switch (remote->sa_family) {
1318 #ifdef INET
1319                                 case AF_INET:
1320                                         {
1321                                                 struct sockaddr_in *sin,
1322                                                            *rsin;
1323
1324                                                 sin = (struct sockaddr_in *)
1325                                                     &net->ro._l_addr;
1326                                                 rsin = (struct sockaddr_in *)remote;
1327                                                 if (sin->sin_addr.s_addr ==
1328                                                     rsin->sin_addr.s_addr) {
1329                                                         /* found it */
1330                                                         if (netp != NULL) {
1331                                                                 *netp = net;
1332                                                         }
1333                                                         if (locked_tcb == NULL) {
1334                                                                 SCTP_INP_DECR_REF(inp);
1335                                                         } else if (locked_tcb != stcb) {
1336                                                                 SCTP_TCB_LOCK(locked_tcb);
1337                                                         }
1338                                                         if (locked_tcb) {
1339                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1340                                                         }
1341                                                         SCTP_INP_WUNLOCK(inp);
1342                                                         SCTP_INP_INFO_RUNLOCK();
1343                                                         return (stcb);
1344                                                 }
1345                                                 break;
1346                                         }
1347 #endif
1348 #ifdef INET6
1349                                 case AF_INET6:
1350                                         {
1351                                                 struct sockaddr_in6 *sin6,
1352                                                             *rsin6;
1353
1354                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1355                                                 rsin6 = (struct sockaddr_in6 *)remote;
1356                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1357                                                     rsin6)) {
1358                                                         /* found it */
1359                                                         if (netp != NULL) {
1360                                                                 *netp = net;
1361                                                         }
1362                                                         if (locked_tcb == NULL) {
1363                                                                 SCTP_INP_DECR_REF(inp);
1364                                                         } else if (locked_tcb != stcb) {
1365                                                                 SCTP_TCB_LOCK(locked_tcb);
1366                                                         }
1367                                                         if (locked_tcb) {
1368                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1369                                                         }
1370                                                         SCTP_INP_WUNLOCK(inp);
1371                                                         SCTP_INP_INFO_RUNLOCK();
1372                                                         return (stcb);
1373                                                 }
1374                                                 break;
1375                                         }
1376 #endif
1377                                 default:
1378                                         /* TSNH */
1379                                         break;
1380                                 }
1381                         }
1382                         SCTP_TCB_UNLOCK(stcb);
1383                 }
1384         } else {
1385                 SCTP_INP_WLOCK(inp);
1386                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1387                         goto null_return;
1388                 }
1389                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1390                     inp->sctp_hashmark)];
1391                 if (head == NULL) {
1392                         goto null_return;
1393                 }
1394                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1395                         if (stcb->rport != rport) {
1396                                 /* remote port does not match */
1397                                 continue;
1398                         }
1399                         SCTP_TCB_LOCK(stcb);
1400                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1401                                 SCTP_TCB_UNLOCK(stcb);
1402                                 continue;
1403                         }
1404                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1405                                 SCTP_TCB_UNLOCK(stcb);
1406                                 continue;
1407                         }
1408                         /* now look at the list of remote addresses */
1409                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1410 #ifdef INVARIANTS
1411                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1412                                         panic("Corrupt net list");
1413                                 }
1414 #endif
1415                                 if (net->ro._l_addr.sa.sa_family !=
1416                                     remote->sa_family) {
1417                                         /* not the same family */
1418                                         continue;
1419                                 }
1420                                 switch (remote->sa_family) {
1421 #ifdef INET
1422                                 case AF_INET:
1423                                         {
1424                                                 struct sockaddr_in *sin,
1425                                                            *rsin;
1426
1427                                                 sin = (struct sockaddr_in *)
1428                                                     &net->ro._l_addr;
1429                                                 rsin = (struct sockaddr_in *)remote;
1430                                                 if (sin->sin_addr.s_addr ==
1431                                                     rsin->sin_addr.s_addr) {
1432                                                         /* found it */
1433                                                         if (netp != NULL) {
1434                                                                 *netp = net;
1435                                                         }
1436                                                         if (locked_tcb == NULL) {
1437                                                                 SCTP_INP_DECR_REF(inp);
1438                                                         } else if (locked_tcb != stcb) {
1439                                                                 SCTP_TCB_LOCK(locked_tcb);
1440                                                         }
1441                                                         if (locked_tcb) {
1442                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1443                                                         }
1444                                                         SCTP_INP_WUNLOCK(inp);
1445                                                         SCTP_INP_INFO_RUNLOCK();
1446                                                         return (stcb);
1447                                                 }
1448                                                 break;
1449                                         }
1450 #endif
1451 #ifdef INET6
1452                                 case AF_INET6:
1453                                         {
1454                                                 struct sockaddr_in6 *sin6,
1455                                                             *rsin6;
1456
1457                                                 sin6 = (struct sockaddr_in6 *)
1458                                                     &net->ro._l_addr;
1459                                                 rsin6 = (struct sockaddr_in6 *)remote;
1460                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1461                                                     rsin6)) {
1462                                                         /* found it */
1463                                                         if (netp != NULL) {
1464                                                                 *netp = net;
1465                                                         }
1466                                                         if (locked_tcb == NULL) {
1467                                                                 SCTP_INP_DECR_REF(inp);
1468                                                         } else if (locked_tcb != stcb) {
1469                                                                 SCTP_TCB_LOCK(locked_tcb);
1470                                                         }
1471                                                         if (locked_tcb) {
1472                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1473                                                         }
1474                                                         SCTP_INP_WUNLOCK(inp);
1475                                                         SCTP_INP_INFO_RUNLOCK();
1476                                                         return (stcb);
1477                                                 }
1478                                                 break;
1479                                         }
1480 #endif
1481                                 default:
1482                                         /* TSNH */
1483                                         break;
1484                                 }
1485                         }
1486                         SCTP_TCB_UNLOCK(stcb);
1487                 }
1488         }
1489 null_return:
1490         /* clean up for returning null */
1491         if (locked_tcb) {
1492                 SCTP_TCB_LOCK(locked_tcb);
1493                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1494         }
1495         SCTP_INP_WUNLOCK(inp);
1496         SCTP_INP_INFO_RUNLOCK();
1497         /* not found */
1498         return (NULL);
1499 }
1500
1501
1502 /*
1503  * Find an association for a specific endpoint using the association id given
1504  * out in the COMM_UP notification
1505  */
1506 struct sctp_tcb *
1507 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1508 {
1509         /*
1510          * Use my the assoc_id to find a endpoint
1511          */
1512         struct sctpasochead *head;
1513         struct sctp_tcb *stcb;
1514         uint32_t id;
1515
1516         if (inp == NULL) {
1517                 SCTP_PRINTF("TSNH ep_associd\n");
1518                 return (NULL);
1519         }
1520         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1521                 SCTP_PRINTF("TSNH ep_associd0\n");
1522                 return (NULL);
1523         }
1524         id = (uint32_t) asoc_id;
1525         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1526         if (head == NULL) {
1527                 /* invalid id TSNH */
1528                 SCTP_PRINTF("TSNH ep_associd1\n");
1529                 return (NULL);
1530         }
1531         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1532                 if (stcb->asoc.assoc_id == id) {
1533                         if (inp != stcb->sctp_ep) {
1534                                 /*
1535                                  * some other guy has the same id active (id
1536                                  * collision ??).
1537                                  */
1538                                 SCTP_PRINTF("TSNH ep_associd2\n");
1539                                 continue;
1540                         }
1541                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1542                                 continue;
1543                         }
1544                         if (want_lock) {
1545                                 SCTP_TCB_LOCK(stcb);
1546                         }
1547                         return (stcb);
1548                 }
1549         }
1550         return (NULL);
1551 }
1552
1553
1554 struct sctp_tcb *
1555 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1556 {
1557         struct sctp_tcb *stcb;
1558
1559         SCTP_INP_RLOCK(inp);
1560         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1561         SCTP_INP_RUNLOCK(inp);
1562         return (stcb);
1563 }
1564
1565
1566 /*
1567  * Endpoint probe expects that the INP_INFO is locked.
1568  */
1569 static struct sctp_inpcb *
1570 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1571     uint16_t lport, uint32_t vrf_id)
1572 {
1573         struct sctp_inpcb *inp;
1574         struct sctp_laddr *laddr;
1575
1576 #ifdef INET
1577         struct sockaddr_in *sin;
1578
1579 #endif
1580 #ifdef INET6
1581         struct sockaddr_in6 *sin6;
1582         struct sockaddr_in6 *intf_addr6;
1583
1584 #endif
1585         int fnd;
1586
1587 #ifdef INET
1588         sin = NULL;
1589 #endif
1590 #ifdef INET6
1591         sin6 = NULL;
1592 #endif
1593         switch (nam->sa_family) {
1594 #ifdef INET
1595         case AF_INET:
1596                 sin = (struct sockaddr_in *)nam;
1597                 break;
1598 #endif
1599 #ifdef INET6
1600         case AF_INET6:
1601                 sin6 = (struct sockaddr_in6 *)nam;
1602                 break;
1603 #endif
1604         default:
1605                 /* unsupported family */
1606                 return (NULL);
1607         }
1608
1609         if (head == NULL)
1610                 return (NULL);
1611
1612         LIST_FOREACH(inp, head, sctp_hash) {
1613                 SCTP_INP_RLOCK(inp);
1614                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1615                         SCTP_INP_RUNLOCK(inp);
1616                         continue;
1617                 }
1618                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1619                     (inp->sctp_lport == lport)) {
1620                         /* got it */
1621 #ifdef INET
1622                         if ((nam->sa_family == AF_INET) &&
1623                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1624                             SCTP_IPV6_V6ONLY(inp)) {
1625                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1626                                 SCTP_INP_RUNLOCK(inp);
1627                                 continue;
1628                         }
1629 #endif
1630 #ifdef INET6
1631                         /* A V6 address and the endpoint is NOT bound V6 */
1632                         if (nam->sa_family == AF_INET6 &&
1633                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1634                                 SCTP_INP_RUNLOCK(inp);
1635                                 continue;
1636                         }
1637 #endif
1638                         /* does a VRF id match? */
1639                         fnd = 0;
1640                         if (inp->def_vrf_id == vrf_id)
1641                                 fnd = 1;
1642
1643                         SCTP_INP_RUNLOCK(inp);
1644                         if (!fnd)
1645                                 continue;
1646                         return (inp);
1647                 }
1648                 SCTP_INP_RUNLOCK(inp);
1649         }
1650         switch (nam->sa_family) {
1651 #ifdef INET
1652         case AF_INET:
1653                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1654                         /* Can't hunt for one that has no address specified */
1655                         return (NULL);
1656                 }
1657                 break;
1658 #endif
1659 #ifdef INET6
1660         case AF_INET6:
1661                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1662                         /* Can't hunt for one that has no address specified */
1663                         return (NULL);
1664                 }
1665                 break;
1666 #endif
1667         default:
1668                 break;
1669         }
1670         /*
1671          * ok, not bound to all so see if we can find a EP bound to this
1672          * address.
1673          */
1674         LIST_FOREACH(inp, head, sctp_hash) {
1675                 SCTP_INP_RLOCK(inp);
1676                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1677                         SCTP_INP_RUNLOCK(inp);
1678                         continue;
1679                 }
1680                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1681                         SCTP_INP_RUNLOCK(inp);
1682                         continue;
1683                 }
1684                 /*
1685                  * Ok this could be a likely candidate, look at all of its
1686                  * addresses
1687                  */
1688                 if (inp->sctp_lport != lport) {
1689                         SCTP_INP_RUNLOCK(inp);
1690                         continue;
1691                 }
1692                 /* does a VRF id match? */
1693                 fnd = 0;
1694                 if (inp->def_vrf_id == vrf_id)
1695                         fnd = 1;
1696
1697                 if (!fnd) {
1698                         SCTP_INP_RUNLOCK(inp);
1699                         continue;
1700                 }
1701                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1702                         if (laddr->ifa == NULL) {
1703                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1704                                     __FUNCTION__);
1705                                 continue;
1706                         }
1707                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1708                             (void *)laddr->ifa);
1709                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1710                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1711                                 continue;
1712                         }
1713                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1714                                 /* possible, see if it matches */
1715                                 switch (nam->sa_family) {
1716 #ifdef INET
1717                                 case AF_INET:
1718                                         if (sin->sin_addr.s_addr ==
1719                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1720                                                 SCTP_INP_RUNLOCK(inp);
1721                                                 return (inp);
1722                                         }
1723                                         break;
1724 #endif
1725 #ifdef INET6
1726                                 case AF_INET6:
1727                                         intf_addr6 = &laddr->ifa->address.sin6;
1728                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1729                                             intf_addr6)) {
1730                                                 SCTP_INP_RUNLOCK(inp);
1731                                                 return (inp);
1732                                         }
1733                                         break;
1734 #endif
1735                                 }
1736                         }
1737                 }
1738                 SCTP_INP_RUNLOCK(inp);
1739         }
1740         return (NULL);
1741 }
1742
1743
1744 static struct sctp_inpcb *
1745 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1746 {
1747         struct sctppcbhead *head;
1748         struct sctp_inpcb *t_inp;
1749         int fnd;
1750
1751         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1752             SCTP_BASE_INFO(hashmark))];
1753         LIST_FOREACH(t_inp, head, sctp_hash) {
1754                 if (t_inp->sctp_lport != lport) {
1755                         continue;
1756                 }
1757                 /* is it in the VRF in question */
1758                 fnd = 0;
1759                 if (t_inp->def_vrf_id == vrf_id)
1760                         fnd = 1;
1761                 if (!fnd)
1762                         continue;
1763
1764                 /* This one is in use. */
1765                 /* check the v6/v4 binding issue */
1766                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1767                     SCTP_IPV6_V6ONLY(t_inp)) {
1768                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1769                                 /* collision in V6 space */
1770                                 return (t_inp);
1771                         } else {
1772                                 /* inp is BOUND_V4 no conflict */
1773                                 continue;
1774                         }
1775                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1776                         /* t_inp is bound v4 and v6, conflict always */
1777                         return (t_inp);
1778                 } else {
1779                         /* t_inp is bound only V4 */
1780                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1781                             SCTP_IPV6_V6ONLY(inp)) {
1782                                 /* no conflict */
1783                                 continue;
1784                         }
1785                         /* else fall through to conflict */
1786                 }
1787                 return (t_inp);
1788         }
1789         return (NULL);
1790 }
1791
1792
1793 int
1794 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1795 {
1796         /* For 1-2-1 with port reuse */
1797         struct sctppcbhead *head;
1798         struct sctp_inpcb *tinp;
1799
1800         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1801                 /* only works with port reuse on */
1802                 return (-1);
1803         }
1804         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1805                 return (0);
1806         }
1807         SCTP_INP_RUNLOCK(inp);
1808         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1809             SCTP_BASE_INFO(hashmark))];
1810         /* Kick out all non-listeners to the TCP hash */
1811         LIST_FOREACH(tinp, head, sctp_hash) {
1812                 if (tinp->sctp_lport != inp->sctp_lport) {
1813                         continue;
1814                 }
1815                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1816                         continue;
1817                 }
1818                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1819                         continue;
1820                 }
1821                 if (tinp->sctp_socket->so_qlimit) {
1822                         continue;
1823                 }
1824                 SCTP_INP_WLOCK(tinp);
1825                 LIST_REMOVE(tinp, sctp_hash);
1826                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1827                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1828                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1829                 SCTP_INP_WUNLOCK(tinp);
1830         }
1831         SCTP_INP_WLOCK(inp);
1832         /* Pull from where he was */
1833         LIST_REMOVE(inp, sctp_hash);
1834         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1835         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1836         LIST_INSERT_HEAD(head, inp, sctp_hash);
1837         SCTP_INP_WUNLOCK(inp);
1838         SCTP_INP_RLOCK(inp);
1839         return (0);
1840 }
1841
1842
1843 struct sctp_inpcb *
1844 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1845     uint32_t vrf_id)
1846 {
1847         /*
1848          * First we check the hash table to see if someone has this port
1849          * bound with just the port.
1850          */
1851         struct sctp_inpcb *inp;
1852         struct sctppcbhead *head;
1853         int lport;
1854         unsigned int i;
1855
1856 #ifdef INET
1857         struct sockaddr_in *sin;
1858
1859 #endif
1860 #ifdef INET6
1861         struct sockaddr_in6 *sin6;
1862
1863 #endif
1864
1865         switch (nam->sa_family) {
1866 #ifdef INET
1867         case AF_INET:
1868                 sin = (struct sockaddr_in *)nam;
1869                 lport = sin->sin_port;
1870                 break;
1871 #endif
1872 #ifdef INET6
1873         case AF_INET6:
1874                 sin6 = (struct sockaddr_in6 *)nam;
1875                 lport = sin6->sin6_port;
1876                 break;
1877 #endif
1878         default:
1879                 return (NULL);
1880         }
1881         /*
1882          * I could cheat here and just cast to one of the types but we will
1883          * do it right. It also provides the check against an Unsupported
1884          * type too.
1885          */
1886         /* Find the head of the ALLADDR chain */
1887         if (have_lock == 0) {
1888                 SCTP_INP_INFO_RLOCK();
1889         }
1890         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1891             SCTP_BASE_INFO(hashmark))];
1892         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1893
1894         /*
1895          * If the TCP model exists it could be that the main listening
1896          * endpoint is gone but there still exists a connected socket for
1897          * this guy. If so we can return the first one that we find. This
1898          * may NOT be the correct one so the caller should be wary on the
1899          * returned INP. Currently the only caller that sets find_tcp_pool
1900          * is in bindx where we are verifying that a user CAN bind the
1901          * address. He either has bound it already, or someone else has, or
1902          * its open to bind, so this is good enough.
1903          */
1904         if (inp == NULL && find_tcp_pool) {
1905                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1906                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1907                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1908                         if (inp) {
1909                                 break;
1910                         }
1911                 }
1912         }
1913         if (inp) {
1914                 SCTP_INP_INCR_REF(inp);
1915         }
1916         if (have_lock == 0) {
1917                 SCTP_INP_INFO_RUNLOCK();
1918         }
1919         return (inp);
1920 }
1921
1922
1923 /*
1924  * Find an association for an endpoint with the pointer to whom you want to
1925  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1926  * need to change the *to to some other struct like a mbuf...
1927  */
1928 struct sctp_tcb *
1929 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
1930     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1931     uint32_t vrf_id)
1932 {
1933         struct sctp_inpcb *inp = NULL;
1934         struct sctp_tcb *stcb;
1935
1936         SCTP_INP_INFO_RLOCK();
1937         if (find_tcp_pool) {
1938                 if (inp_p != NULL) {
1939                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
1940                             vrf_id);
1941                 } else {
1942                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
1943                             vrf_id);
1944                 }
1945                 if (stcb != NULL) {
1946                         SCTP_INP_INFO_RUNLOCK();
1947                         return (stcb);
1948                 }
1949         }
1950         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1951         if (inp_p != NULL) {
1952                 *inp_p = inp;
1953         }
1954         SCTP_INP_INFO_RUNLOCK();
1955         if (inp == NULL) {
1956                 return (NULL);
1957         }
1958         /*
1959          * ok, we have an endpoint, now lets find the assoc for it (if any)
1960          * we now place the source address or from in the to of the find
1961          * endpoint call. Since in reality this chain is used from the
1962          * inbound packet side.
1963          */
1964         if (inp_p != NULL) {
1965                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1966                     NULL);
1967         } else {
1968                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
1969                     NULL);
1970         }
1971         return (stcb);
1972 }
1973
1974
1975 /*
1976  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1977  * find all addresses that the sender has specified in any address list. Each
1978  * address will be used to lookup the TCB and see if one exits.
1979  */
1980 static struct sctp_tcb *
1981 sctp_findassociation_special_addr(struct mbuf *m, int offset,
1982     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1983     struct sockaddr *dst)
1984 {
1985         struct sctp_paramhdr *phdr, parm_buf;
1986
1987 #if defined(INET) || defined(INET6)
1988         struct sctp_tcb *stcb;
1989         uint16_t ptype;
1990
1991 #endif
1992         uint16_t plen;
1993
1994 #ifdef INET
1995         struct sockaddr_in sin4;
1996
1997 #endif
1998 #ifdef INET6
1999         struct sockaddr_in6 sin6;
2000
2001 #endif
2002
2003 #ifdef INET
2004         memset(&sin4, 0, sizeof(sin4));
2005         sin4.sin_len = sizeof(sin4);
2006         sin4.sin_family = AF_INET;
2007         sin4.sin_port = sh->src_port;
2008 #endif
2009 #ifdef INET6
2010         memset(&sin6, 0, sizeof(sin6));
2011         sin6.sin6_len = sizeof(sin6);
2012         sin6.sin6_family = AF_INET6;
2013         sin6.sin6_port = sh->src_port;
2014 #endif
2015
2016         offset += sizeof(struct sctp_init_chunk);
2017
2018         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
2019         while (phdr != NULL) {
2020                 /* now we must see if we want the parameter */
2021 #if defined(INET) || defined(INET6)
2022                 ptype = ntohs(phdr->param_type);
2023 #endif
2024                 plen = ntohs(phdr->param_length);
2025                 if (plen == 0) {
2026                         break;
2027                 }
2028 #ifdef INET
2029                 if (ptype == SCTP_IPV4_ADDRESS &&
2030                     plen == sizeof(struct sctp_ipv4addr_param)) {
2031                         /* Get the rest of the address */
2032                         struct sctp_ipv4addr_param ip4_parm, *p4;
2033
2034                         phdr = sctp_get_next_param(m, offset,
2035                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2036                         if (phdr == NULL) {
2037                                 return (NULL);
2038                         }
2039                         p4 = (struct sctp_ipv4addr_param *)phdr;
2040                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2041                         /* look it up */
2042                         stcb = sctp_findassociation_ep_addr(inp_p,
2043                             (struct sockaddr *)&sin4, netp, dst, NULL);
2044                         if (stcb != NULL) {
2045                                 return (stcb);
2046                         }
2047                 }
2048 #endif
2049 #ifdef INET6
2050                 if (ptype == SCTP_IPV6_ADDRESS &&
2051                     plen == sizeof(struct sctp_ipv6addr_param)) {
2052                         /* Get the rest of the address */
2053                         struct sctp_ipv6addr_param ip6_parm, *p6;
2054
2055                         phdr = sctp_get_next_param(m, offset,
2056                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
2057                         if (phdr == NULL) {
2058                                 return (NULL);
2059                         }
2060                         p6 = (struct sctp_ipv6addr_param *)phdr;
2061                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2062                         /* look it up */
2063                         stcb = sctp_findassociation_ep_addr(inp_p,
2064                             (struct sockaddr *)&sin6, netp, dst, NULL);
2065                         if (stcb != NULL) {
2066                                 return (stcb);
2067                         }
2068                 }
2069 #endif
2070                 offset += SCTP_SIZE32(plen);
2071                 phdr = sctp_get_next_param(m, offset, &parm_buf,
2072                     sizeof(parm_buf));
2073         }
2074         return (NULL);
2075 }
2076
2077 static struct sctp_tcb *
2078 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2079     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2080     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2081 {
2082         /*
2083          * Use my vtag to hash. If we find it we then verify the source addr
2084          * is in the assoc. If all goes well we save a bit on rec of a
2085          * packet.
2086          */
2087         struct sctpasochead *head;
2088         struct sctp_nets *net;
2089         struct sctp_tcb *stcb;
2090
2091         SCTP_INP_INFO_RLOCK();
2092         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2093             SCTP_BASE_INFO(hashasocmark))];
2094         if (head == NULL) {
2095                 /* invalid vtag */
2096                 SCTP_INP_INFO_RUNLOCK();
2097                 return (NULL);
2098         }
2099         LIST_FOREACH(stcb, head, sctp_asocs) {
2100                 SCTP_INP_RLOCK(stcb->sctp_ep);
2101                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2102                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2103                         continue;
2104                 }
2105                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2106                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2107                         continue;
2108                 }
2109                 SCTP_TCB_LOCK(stcb);
2110                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2111                 if (stcb->asoc.my_vtag == vtag) {
2112                         /* candidate */
2113                         if (stcb->rport != rport) {
2114                                 SCTP_TCB_UNLOCK(stcb);
2115                                 continue;
2116                         }
2117                         if (stcb->sctp_ep->sctp_lport != lport) {
2118                                 SCTP_TCB_UNLOCK(stcb);
2119                                 continue;
2120                         }
2121                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2122                                 SCTP_TCB_UNLOCK(stcb);
2123                                 continue;
2124                         }
2125                         /* RRS:Need toaddr check here */
2126                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2127                                 /* Endpoint does not own this address */
2128                                 SCTP_TCB_UNLOCK(stcb);
2129                                 continue;
2130                         }
2131                         if (remote_tag) {
2132                                 /*
2133                                  * If we have both vtags that's all we match
2134                                  * on
2135                                  */
2136                                 if (stcb->asoc.peer_vtag == remote_tag) {
2137                                         /*
2138                                          * If both tags match we consider it
2139                                          * conclusive and check NO
2140                                          * source/destination addresses
2141                                          */
2142                                         goto conclusive;
2143                                 }
2144                         }
2145                         if (skip_src_check) {
2146                 conclusive:
2147                                 if (from) {
2148                                         *netp = sctp_findnet(stcb, from);
2149                                 } else {
2150                                         *netp = NULL;   /* unknown */
2151                                 }
2152                                 if (inp_p)
2153                                         *inp_p = stcb->sctp_ep;
2154                                 SCTP_INP_INFO_RUNLOCK();
2155                                 return (stcb);
2156                         }
2157                         net = sctp_findnet(stcb, from);
2158                         if (net) {
2159                                 /* yep its him. */
2160                                 *netp = net;
2161                                 SCTP_STAT_INCR(sctps_vtagexpress);
2162                                 *inp_p = stcb->sctp_ep;
2163                                 SCTP_INP_INFO_RUNLOCK();
2164                                 return (stcb);
2165                         } else {
2166                                 /*
2167                                  * not him, this should only happen in rare
2168                                  * cases so I peg it.
2169                                  */
2170                                 SCTP_STAT_INCR(sctps_vtagbogus);
2171                         }
2172                 }
2173                 SCTP_TCB_UNLOCK(stcb);
2174         }
2175         SCTP_INP_INFO_RUNLOCK();
2176         return (NULL);
2177 }
2178
2179
2180 /*
2181  * Find an association with the pointer to the inbound IP packet. This can be
2182  * a IPv4 or IPv6 packet.
2183  */
2184 struct sctp_tcb *
2185 sctp_findassociation_addr(struct mbuf *m, int offset,
2186     struct sockaddr *src, struct sockaddr *dst,
2187     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2188     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2189 {
2190         int find_tcp_pool;
2191         struct sctp_tcb *stcb;
2192         struct sctp_inpcb *inp;
2193
2194         if (sh->v_tag) {
2195                 /* we only go down this path if vtag is non-zero */
2196                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2197                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2198                 if (stcb) {
2199                         return (stcb);
2200                 }
2201         }
2202         find_tcp_pool = 0;
2203         if ((ch->chunk_type != SCTP_INITIATION) &&
2204             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2205             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2206             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2207                 /* Other chunk types go to the tcp pool. */
2208                 find_tcp_pool = 1;
2209         }
2210         if (inp_p) {
2211                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2212                     find_tcp_pool, vrf_id);
2213                 inp = *inp_p;
2214         } else {
2215                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2216                     find_tcp_pool, vrf_id);
2217         }
2218         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2219         if (stcb == NULL && inp) {
2220                 /* Found a EP but not this address */
2221                 if ((ch->chunk_type == SCTP_INITIATION) ||
2222                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2223                         /*-
2224                          * special hook, we do NOT return linp or an
2225                          * association that is linked to an existing
2226                          * association that is under the TCP pool (i.e. no
2227                          * listener exists). The endpoint finding routine
2228                          * will always find a listener before examining the
2229                          * TCP pool.
2230                          */
2231                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2232                                 if (inp_p) {
2233                                         *inp_p = NULL;
2234                                 }
2235                                 return (NULL);
2236                         }
2237                         stcb = sctp_findassociation_special_addr(m,
2238                             offset, sh, &inp, netp, dst);
2239                         if (inp_p != NULL) {
2240                                 *inp_p = inp;
2241                         }
2242                 }
2243         }
2244         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2245         return (stcb);
2246 }
2247
2248 /*
2249  * lookup an association by an ASCONF lookup address.
2250  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2251  */
2252 struct sctp_tcb *
2253 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2254     struct sockaddr *dst, struct sctphdr *sh,
2255     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2256 {
2257         struct sctp_tcb *stcb;
2258         struct sockaddr_storage remote_store;
2259         struct sctp_paramhdr parm_buf, *phdr;
2260         int ptype;
2261         int zero_address = 0;
2262
2263 #ifdef INET
2264         struct sockaddr_in *sin;
2265
2266 #endif
2267 #ifdef INET6
2268         struct sockaddr_in6 *sin6;
2269
2270 #endif
2271
2272         memset(&remote_store, 0, sizeof(remote_store));
2273         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2274             &parm_buf, sizeof(struct sctp_paramhdr));
2275         if (phdr == NULL) {
2276                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2277                     __FUNCTION__);
2278                 return NULL;
2279         }
2280         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2281         /* get the correlation address */
2282         switch (ptype) {
2283 #ifdef INET6
2284         case SCTP_IPV6_ADDRESS:
2285                 {
2286                         /* ipv6 address param */
2287                         struct sctp_ipv6addr_param *p6, p6_buf;
2288
2289                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2290                                 return NULL;
2291                         }
2292                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2293                             offset + sizeof(struct sctp_asconf_chunk),
2294                             &p6_buf.ph, sizeof(*p6));
2295                         if (p6 == NULL) {
2296                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2297                                     __FUNCTION__);
2298                                 return (NULL);
2299                         }
2300                         sin6 = (struct sockaddr_in6 *)&remote_store;
2301                         sin6->sin6_family = AF_INET6;
2302                         sin6->sin6_len = sizeof(*sin6);
2303                         sin6->sin6_port = sh->src_port;
2304                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2305                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2306                                 zero_address = 1;
2307                         break;
2308                 }
2309 #endif
2310 #ifdef INET
2311         case SCTP_IPV4_ADDRESS:
2312                 {
2313                         /* ipv4 address param */
2314                         struct sctp_ipv4addr_param *p4, p4_buf;
2315
2316                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2317                                 return NULL;
2318                         }
2319                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2320                             offset + sizeof(struct sctp_asconf_chunk),
2321                             &p4_buf.ph, sizeof(*p4));
2322                         if (p4 == NULL) {
2323                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2324                                     __FUNCTION__);
2325                                 return (NULL);
2326                         }
2327                         sin = (struct sockaddr_in *)&remote_store;
2328                         sin->sin_family = AF_INET;
2329                         sin->sin_len = sizeof(*sin);
2330                         sin->sin_port = sh->src_port;
2331                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2332                         if (sin->sin_addr.s_addr == INADDR_ANY)
2333                                 zero_address = 1;
2334                         break;
2335                 }
2336 #endif
2337         default:
2338                 /* invalid address param type */
2339                 return NULL;
2340         }
2341
2342         if (zero_address) {
2343                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2344                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2345                 if (stcb != NULL) {
2346                         SCTP_INP_DECR_REF(*inp_p);
2347                 }
2348         } else {
2349                 stcb = sctp_findassociation_ep_addr(inp_p,
2350                     (struct sockaddr *)&remote_store, netp,
2351                     dst, NULL);
2352         }
2353         return (stcb);
2354 }
2355
2356
2357 /*
2358  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2359  * addresses. This way if we don't get a bind we by default pick a ephemeral
2360  * port with all addresses bound.
2361  */
2362 int
2363 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2364 {
2365         /*
2366          * we get called when a new endpoint starts up. We need to allocate
2367          * the sctp_inpcb structure from the zone and init it. Mark it as
2368          * unbound and find a port that we can use as an ephemeral with
2369          * INADDR_ANY. If the user binds later no problem we can then add in
2370          * the specific addresses. And setup the default parameters for the
2371          * EP.
2372          */
2373         int i, error;
2374         struct sctp_inpcb *inp;
2375         struct sctp_pcb *m;
2376         struct timeval time;
2377         sctp_sharedkey_t *null_key;
2378
2379         error = 0;
2380
2381         SCTP_INP_INFO_WLOCK();
2382         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2383         if (inp == NULL) {
2384                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2385                 SCTP_INP_INFO_WUNLOCK();
2386                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2387                 return (ENOBUFS);
2388         }
2389         /* zap it */
2390         bzero(inp, sizeof(*inp));
2391
2392         /* bump generations */
2393         /* setup socket pointers */
2394         inp->sctp_socket = so;
2395         inp->ip_inp.inp.inp_socket = so;
2396 #ifdef INET6
2397         if (INP_SOCKAF(so) == AF_INET6) {
2398                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2399                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2400                 }
2401                 if (MODULE_GLOBAL(ip6_v6only)) {
2402                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2403                 }
2404         }
2405 #endif
2406         inp->sctp_associd_counter = 1;
2407         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2408         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2409         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2410         inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable);
2411         /* init the small hash table we use to track asocid <-> tcb */
2412         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2413         if (inp->sctp_asocidhash == NULL) {
2414                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2415                 SCTP_INP_INFO_WUNLOCK();
2416                 return (ENOBUFS);
2417         }
2418 #ifdef IPSEC
2419         {
2420                 struct inpcbpolicy *pcb_sp = NULL;
2421
2422                 error = ipsec_init_policy(so, &pcb_sp);
2423                 /* Arrange to share the policy */
2424                 inp->ip_inp.inp.inp_sp = pcb_sp;
2425                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2426         }
2427         if (error != 0) {
2428                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2429                 SCTP_INP_INFO_WUNLOCK();
2430                 return error;
2431         }
2432 #endif                          /* IPSEC */
2433         SCTP_INCR_EP_COUNT();
2434         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2435         SCTP_INP_INFO_WUNLOCK();
2436
2437         so->so_pcb = (caddr_t)inp;
2438
2439         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2440                 /* UDP style socket */
2441                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2442                     SCTP_PCB_FLAGS_UNBOUND);
2443                 /* Be sure it is NON-BLOCKING IO for UDP */
2444                 /* SCTP_SET_SO_NBIO(so); */
2445         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2446                 /* TCP style socket */
2447                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2448                     SCTP_PCB_FLAGS_UNBOUND);
2449                 /* Be sure we have blocking IO by default */
2450                 SCTP_CLEAR_SO_NBIO(so);
2451         } else {
2452                 /*
2453                  * unsupported socket type (RAW, etc)- in case we missed it
2454                  * in protosw
2455                  */
2456                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2457                 so->so_pcb = NULL;
2458                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2459                 return (EOPNOTSUPP);
2460         }
2461         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2462                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2463                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2464         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2465                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2466                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2467         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2468                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2469                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2470         }
2471         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2472             &inp->sctp_hashmark);
2473         if (inp->sctp_tcbhash == NULL) {
2474                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2475                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2476                 so->so_pcb = NULL;
2477                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2478                 return (ENOBUFS);
2479         }
2480         inp->def_vrf_id = vrf_id;
2481
2482         SCTP_INP_INFO_WLOCK();
2483         SCTP_INP_LOCK_INIT(inp);
2484         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2485         SCTP_INP_READ_INIT(inp);
2486         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2487         /* lock the new ep */
2488         SCTP_INP_WLOCK(inp);
2489
2490         /* add it to the info area */
2491         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2492         SCTP_INP_INFO_WUNLOCK();
2493
2494         TAILQ_INIT(&inp->read_queue);
2495         LIST_INIT(&inp->sctp_addr_list);
2496
2497         LIST_INIT(&inp->sctp_asoc_list);
2498
2499 #ifdef SCTP_TRACK_FREED_ASOCS
2500         /* TEMP CODE */
2501         LIST_INIT(&inp->sctp_asoc_free_list);
2502 #endif
2503         /* Init the timer structure for signature change */
2504         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2505         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2506
2507         /* now init the actual endpoint default data */
2508         m = &inp->sctp_ep;
2509
2510         /* setup the base timeout information */
2511         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2512         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2513         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2514         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2515         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2516         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2517         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2518         /* all max/min max are in ms */
2519         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2520         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2521         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2522         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2523         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2524         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2525         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2526         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2527         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2528         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2529         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2530         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2531         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2532
2533         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2534         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2535         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2536         /* number of streams to pre-open on a association */
2537         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2538
2539         /* Add adaptation cookie */
2540         m->adaptation_layer_indicator = 0;
2541         m->adaptation_layer_indicator_provided = 0;
2542
2543         /* seed random number generator */
2544         m->random_counter = 1;
2545         m->store_at = SCTP_SIGNATURE_SIZE;
2546         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2547         sctp_fill_random_store(m);
2548
2549         /* Minimum cookie size */
2550         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2551             sizeof(struct sctp_state_cookie);
2552         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2553
2554         /* Setup the initial secret */
2555         (void)SCTP_GETTIME_TIMEVAL(&time);
2556         m->time_of_secret_change = time.tv_sec;
2557
2558         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2559                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2560         }
2561         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2562
2563         /* How long is a cookie good for ? */
2564         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2565         /*
2566          * Initialize authentication parameters
2567          */
2568         m->local_hmacs = sctp_default_supported_hmaclist();
2569         m->local_auth_chunks = sctp_alloc_chunklist();
2570         m->default_dscp = 0;
2571 #ifdef INET6
2572         m->default_flowlabel = 0;
2573 #endif
2574         m->port = 0;            /* encapsulation disabled by default */
2575         sctp_auth_set_default_chunks(m->local_auth_chunks);
2576         LIST_INIT(&m->shared_keys);
2577         /* add default NULL key as key id 0 */
2578         null_key = sctp_alloc_sharedkey();
2579         sctp_insert_sharedkey(&m->shared_keys, null_key);
2580         SCTP_INP_WUNLOCK(inp);
2581 #ifdef SCTP_LOG_CLOSING
2582         sctp_log_closing(inp, NULL, 12);
2583 #endif
2584         return (error);
2585 }
2586
2587
2588 void
2589 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2590     struct sctp_tcb *stcb)
2591 {
2592         struct sctp_nets *net;
2593         uint16_t lport, rport;
2594         struct sctppcbhead *head;
2595         struct sctp_laddr *laddr, *oladdr;
2596
2597         atomic_add_int(&stcb->asoc.refcnt, 1);
2598         SCTP_TCB_UNLOCK(stcb);
2599         SCTP_INP_INFO_WLOCK();
2600         SCTP_INP_WLOCK(old_inp);
2601         SCTP_INP_WLOCK(new_inp);
2602         SCTP_TCB_LOCK(stcb);
2603         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2604
2605         new_inp->sctp_ep.time_of_secret_change =
2606             old_inp->sctp_ep.time_of_secret_change;
2607         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2608             sizeof(old_inp->sctp_ep.secret_key));
2609         new_inp->sctp_ep.current_secret_number =
2610             old_inp->sctp_ep.current_secret_number;
2611         new_inp->sctp_ep.last_secret_number =
2612             old_inp->sctp_ep.last_secret_number;
2613         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2614
2615         /* make it so new data pours into the new socket */
2616         stcb->sctp_socket = new_inp->sctp_socket;
2617         stcb->sctp_ep = new_inp;
2618
2619         /* Copy the port across */
2620         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2621         rport = stcb->rport;
2622         /* Pull the tcb from the old association */
2623         LIST_REMOVE(stcb, sctp_tcbhash);
2624         LIST_REMOVE(stcb, sctp_tcblist);
2625         if (stcb->asoc.in_asocid_hash) {
2626                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2627         }
2628         /* Now insert the new_inp into the TCP connected hash */
2629         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2630
2631         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2632         /* Its safe to access */
2633         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2634
2635         /* Now move the tcb into the endpoint list */
2636         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2637         /*
2638          * Question, do we even need to worry about the ep-hash since we
2639          * only have one connection? Probably not :> so lets get rid of it
2640          * and not suck up any kernel memory in that.
2641          */
2642         if (stcb->asoc.in_asocid_hash) {
2643                 struct sctpasochead *lhd;
2644
2645                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2646                     new_inp->hashasocidmark)];
2647                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2648         }
2649         /* Ok. Let's restart timer. */
2650         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2651                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2652                     stcb, net);
2653         }
2654
2655         SCTP_INP_INFO_WUNLOCK();
2656         if (new_inp->sctp_tcbhash != NULL) {
2657                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2658                 new_inp->sctp_tcbhash = NULL;
2659         }
2660         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2661                 /* Subset bound, so copy in the laddr list from the old_inp */
2662                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2663                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2664                         if (laddr == NULL) {
2665                                 /*
2666                                  * Gak, what can we do? This assoc is really
2667                                  * HOSED. We probably should send an abort
2668                                  * here.
2669                                  */
2670                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2671                                 continue;
2672                         }
2673                         SCTP_INCR_LADDR_COUNT();
2674                         bzero(laddr, sizeof(*laddr));
2675                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2676                         laddr->ifa = oladdr->ifa;
2677                         atomic_add_int(&laddr->ifa->refcount, 1);
2678                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2679                             sctp_nxt_addr);
2680                         new_inp->laddr_count++;
2681                         if (oladdr == stcb->asoc.last_used_address) {
2682                                 stcb->asoc.last_used_address = laddr;
2683                         }
2684                 }
2685         }
2686         /*
2687          * Now any running timers need to be adjusted since we really don't
2688          * care if they are running or not just blast in the new_inp into
2689          * all of them.
2690          */
2691
2692         stcb->asoc.dack_timer.ep = (void *)new_inp;
2693         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2694         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2695         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2696         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2697         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2698         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2699         /* now what about the nets? */
2700         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2701                 net->pmtu_timer.ep = (void *)new_inp;
2702                 net->hb_timer.ep = (void *)new_inp;
2703                 net->rxt_timer.ep = (void *)new_inp;
2704         }
2705         SCTP_INP_WUNLOCK(new_inp);
2706         SCTP_INP_WUNLOCK(old_inp);
2707 }
2708
2709
2710
2711
2712 /* sctp_ifap is used to bypass normal local address validation checks */
2713 int
2714 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2715     struct sctp_ifa *sctp_ifap, struct thread *p)
2716 {
2717         /* bind a ep to a socket address */
2718         struct sctppcbhead *head;
2719         struct sctp_inpcb *inp, *inp_tmp;
2720         struct inpcb *ip_inp;
2721         int port_reuse_active = 0;
2722         int bindall;
2723         uint16_t lport;
2724         int error;
2725         uint32_t vrf_id;
2726
2727         lport = 0;
2728         error = 0;
2729         bindall = 1;
2730         inp = (struct sctp_inpcb *)so->so_pcb;
2731         ip_inp = (struct inpcb *)so->so_pcb;
2732 #ifdef SCTP_DEBUG
2733         if (addr) {
2734                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2735                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2736                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2737                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2738         }
2739 #endif
2740         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2741                 /* already did a bind, subsequent binds NOT allowed ! */
2742                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2743                 return (EINVAL);
2744         }
2745 #ifdef INVARIANTS
2746         if (p == NULL)
2747                 panic("null proc/thread");
2748 #endif
2749         if (addr != NULL) {
2750                 switch (addr->sa_family) {
2751 #ifdef INET
2752                 case AF_INET:
2753                         {
2754                                 struct sockaddr_in *sin;
2755
2756                                 /* IPV6_V6ONLY socket? */
2757                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2758                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2759                                         return (EINVAL);
2760                                 }
2761                                 if (addr->sa_len != sizeof(*sin)) {
2762                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2763                                         return (EINVAL);
2764                                 }
2765                                 sin = (struct sockaddr_in *)addr;
2766                                 lport = sin->sin_port;
2767                                 /*
2768                                  * For LOOPBACK the prison_local_ip4() call
2769                                  * will transmute the ip address to the
2770                                  * proper value.
2771                                  */
2772                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2773                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2774                                         return (error);
2775                                 }
2776                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2777                                         bindall = 0;
2778                                 }
2779                                 break;
2780                         }
2781 #endif
2782 #ifdef INET6
2783                 case AF_INET6:
2784                         {
2785                                 /*
2786                                  * Only for pure IPv6 Address. (No IPv4
2787                                  * Mapped!)
2788                                  */
2789                                 struct sockaddr_in6 *sin6;
2790
2791                                 sin6 = (struct sockaddr_in6 *)addr;
2792
2793                                 if (addr->sa_len != sizeof(*sin6)) {
2794                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2795                                         return (EINVAL);
2796                                 }
2797                                 lport = sin6->sin6_port;
2798                                 /*
2799                                  * For LOOPBACK the prison_local_ip6() call
2800                                  * will transmute the ipv6 address to the
2801                                  * proper value.
2802                                  */
2803                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2804                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2805                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2806                                         return (error);
2807                                 }
2808                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2809                                         bindall = 0;
2810                                         /* KAME hack: embed scopeid */
2811                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2812                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2813                                                 return (EINVAL);
2814                                         }
2815                                 }
2816                                 /* this must be cleared for ifa_ifwithaddr() */
2817                                 sin6->sin6_scope_id = 0;
2818                                 break;
2819                         }
2820 #endif
2821                 default:
2822                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2823                         return (EAFNOSUPPORT);
2824                 }
2825         }
2826         SCTP_INP_INFO_WLOCK();
2827         SCTP_INP_WLOCK(inp);
2828         /* Setup a vrf_id to be the default for the non-bind-all case. */
2829         vrf_id = inp->def_vrf_id;
2830
2831         /* increase our count due to the unlock we do */
2832         SCTP_INP_INCR_REF(inp);
2833         if (lport) {
2834                 /*
2835                  * Did the caller specify a port? if so we must see if an ep
2836                  * already has this one bound.
2837                  */
2838                 /* got to be root to get at low ports */
2839                 if (ntohs(lport) < IPPORT_RESERVED) {
2840                         if (p && (error =
2841                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2842                             )) {
2843                                 SCTP_INP_DECR_REF(inp);
2844                                 SCTP_INP_WUNLOCK(inp);
2845                                 SCTP_INP_INFO_WUNLOCK();
2846                                 return (error);
2847                         }
2848                 }
2849                 if (p == NULL) {
2850                         SCTP_INP_DECR_REF(inp);
2851                         SCTP_INP_WUNLOCK(inp);
2852                         SCTP_INP_INFO_WUNLOCK();
2853                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2854                         return (error);
2855                 }
2856                 SCTP_INP_WUNLOCK(inp);
2857                 if (bindall) {
2858                         vrf_id = inp->def_vrf_id;
2859                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2860                         if (inp_tmp != NULL) {
2861                                 /*
2862                                  * lock guy returned and lower count note
2863                                  * that we are not bound so inp_tmp should
2864                                  * NEVER be inp. And it is this inp
2865                                  * (inp_tmp) that gets the reference bump,
2866                                  * so we must lower it.
2867                                  */
2868                                 SCTP_INP_DECR_REF(inp_tmp);
2869                                 /* unlock info */
2870                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2871                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2872                                         /*
2873                                          * Ok, must be one-2-one and
2874                                          * allowing port re-use
2875                                          */
2876                                         port_reuse_active = 1;
2877                                         goto continue_anyway;
2878                                 }
2879                                 SCTP_INP_DECR_REF(inp);
2880                                 SCTP_INP_INFO_WUNLOCK();
2881                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2882                                 return (EADDRINUSE);
2883                         }
2884                 } else {
2885                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2886                         if (inp_tmp != NULL) {
2887                                 /*
2888                                  * lock guy returned and lower count note
2889                                  * that we are not bound so inp_tmp should
2890                                  * NEVER be inp. And it is this inp
2891                                  * (inp_tmp) that gets the reference bump,
2892                                  * so we must lower it.
2893                                  */
2894                                 SCTP_INP_DECR_REF(inp_tmp);
2895                                 /* unlock info */
2896                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2897                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2898                                         /*
2899                                          * Ok, must be one-2-one and
2900                                          * allowing port re-use
2901                                          */
2902                                         port_reuse_active = 1;
2903                                         goto continue_anyway;
2904                                 }
2905                                 SCTP_INP_DECR_REF(inp);
2906                                 SCTP_INP_INFO_WUNLOCK();
2907                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2908                                 return (EADDRINUSE);
2909                         }
2910                 }
2911 continue_anyway:
2912                 SCTP_INP_WLOCK(inp);
2913                 if (bindall) {
2914                         /* verify that no lport is not used by a singleton */
2915                         if ((port_reuse_active == 0) &&
2916                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
2917                                 /* Sorry someone already has this one bound */
2918                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2919                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2920                                         port_reuse_active = 1;
2921                                 } else {
2922                                         SCTP_INP_DECR_REF(inp);
2923                                         SCTP_INP_WUNLOCK(inp);
2924                                         SCTP_INP_INFO_WUNLOCK();
2925                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2926                                         return (EADDRINUSE);
2927                                 }
2928                         }
2929                 }
2930         } else {
2931                 uint16_t first, last, candidate;
2932                 uint16_t count;
2933                 int done;
2934
2935                 if (ip_inp->inp_flags & INP_HIGHPORT) {
2936                         first = MODULE_GLOBAL(ipport_hifirstauto);
2937                         last = MODULE_GLOBAL(ipport_hilastauto);
2938                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2939                         if (p && (error =
2940                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2941                             )) {
2942                                 SCTP_INP_DECR_REF(inp);
2943                                 SCTP_INP_WUNLOCK(inp);
2944                                 SCTP_INP_INFO_WUNLOCK();
2945                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2946                                 return (error);
2947                         }
2948                         first = MODULE_GLOBAL(ipport_lowfirstauto);
2949                         last = MODULE_GLOBAL(ipport_lowlastauto);
2950                 } else {
2951                         first = MODULE_GLOBAL(ipport_firstauto);
2952                         last = MODULE_GLOBAL(ipport_lastauto);
2953                 }
2954                 if (first > last) {
2955                         uint16_t temp;
2956
2957                         temp = first;
2958                         first = last;
2959                         last = temp;
2960                 }
2961                 count = last - first + 1;       /* number of candidates */
2962                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2963
2964                 done = 0;
2965                 while (!done) {
2966                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
2967                                 done = 1;
2968                         }
2969                         if (!done) {
2970                                 if (--count == 0) {
2971                                         SCTP_INP_DECR_REF(inp);
2972                                         SCTP_INP_WUNLOCK(inp);
2973                                         SCTP_INP_INFO_WUNLOCK();
2974                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2975                                         return (EADDRINUSE);
2976                                 }
2977                                 if (candidate == last)
2978                                         candidate = first;
2979                                 else
2980                                         candidate = candidate + 1;
2981                         }
2982                 }
2983                 lport = htons(candidate);
2984         }
2985         SCTP_INP_DECR_REF(inp);
2986         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2987             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2988                 /*
2989                  * this really should not happen. The guy did a non-blocking
2990                  * bind and then did a close at the same time.
2991                  */
2992                 SCTP_INP_WUNLOCK(inp);
2993                 SCTP_INP_INFO_WUNLOCK();
2994                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2995                 return (EINVAL);
2996         }
2997         /* ok we look clear to give out this port, so lets setup the binding */
2998         if (bindall) {
2999                 /* binding to all addresses, so just set in the proper flags */
3000                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3001                 /* set the automatic addr changes from kernel flag */
3002                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3003                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3004                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3005                 } else {
3006                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3007                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3008                 }
3009                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3010                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3011                 } else {
3012                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3013                 }
3014                 /*
3015                  * set the automatic mobility_base from kernel flag (by
3016                  * micchie)
3017                  */
3018                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3019                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3020                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3021                 } else {
3022                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3023                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3024                 }
3025                 /*
3026                  * set the automatic mobility_fasthandoff from kernel flag
3027                  * (by micchie)
3028                  */
3029                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3030                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3031                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3032                 } else {
3033                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3034                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3035                 }
3036         } else {
3037                 /*
3038                  * bind specific, make sure flags is off and add a new
3039                  * address structure to the sctp_addr_list inside the ep
3040                  * structure.
3041                  *
3042                  * We will need to allocate one and insert it at the head. The
3043                  * socketopt call can just insert new addresses in there as
3044                  * well. It will also have to do the embed scope kame hack
3045                  * too (before adding).
3046                  */
3047                 struct sctp_ifa *ifa;
3048                 struct sockaddr_storage store_sa;
3049
3050                 memset(&store_sa, 0, sizeof(store_sa));
3051                 switch (addr->sa_family) {
3052 #ifdef INET
3053                 case AF_INET:
3054                         {
3055                                 struct sockaddr_in *sin;
3056
3057                                 sin = (struct sockaddr_in *)&store_sa;
3058                                 memcpy(sin, addr, sizeof(struct sockaddr_in));
3059                                 sin->sin_port = 0;
3060                                 break;
3061                         }
3062 #endif
3063 #ifdef INET6
3064                 case AF_INET6:
3065                         {
3066                                 struct sockaddr_in6 *sin6;
3067
3068                                 sin6 = (struct sockaddr_in6 *)&store_sa;
3069                                 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3070                                 sin6->sin6_port = 0;
3071                                 break;
3072                         }
3073 #endif
3074                 default:
3075                         break;
3076                 }
3077                 /*
3078                  * first find the interface with the bound address need to
3079                  * zero out the port to find the address! yuck! can't do
3080                  * this earlier since need port for sctp_pcb_findep()
3081                  */
3082                 if (sctp_ifap != NULL) {
3083                         ifa = sctp_ifap;
3084                 } else {
3085                         /*
3086                          * Note for BSD we hit here always other O/S's will
3087                          * pass things in via the sctp_ifap argument
3088                          * (Panda).
3089                          */
3090                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3091                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3092                 }
3093                 if (ifa == NULL) {
3094                         /* Can't find an interface with that address */
3095                         SCTP_INP_WUNLOCK(inp);
3096                         SCTP_INP_INFO_WUNLOCK();
3097                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3098                         return (EADDRNOTAVAIL);
3099                 }
3100 #ifdef INET6
3101                 if (addr->sa_family == AF_INET6) {
3102                         /* GAK, more FIXME IFA lock? */
3103                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3104                                 /* Can't bind a non-existent addr. */
3105                                 SCTP_INP_WUNLOCK(inp);
3106                                 SCTP_INP_INFO_WUNLOCK();
3107                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3108                                 return (EINVAL);
3109                         }
3110                 }
3111 #endif
3112                 /* we're not bound all */
3113                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3114                 /* allow bindx() to send ASCONF's for binding changes */
3115                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3116                 /* clear automatic addr changes from kernel flag */
3117                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3118
3119                 /* add this address to the endpoint list */
3120                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3121                 if (error != 0) {
3122                         SCTP_INP_WUNLOCK(inp);
3123                         SCTP_INP_INFO_WUNLOCK();
3124                         return (error);
3125                 }
3126                 inp->laddr_count++;
3127         }
3128         /* find the bucket */
3129         if (port_reuse_active) {
3130                 /* Put it into tcp 1-2-1 hash */
3131                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3132                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3133         } else {
3134                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3135         }
3136         /* put it in the bucket */
3137         LIST_INSERT_HEAD(head, inp, sctp_hash);
3138         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3139             (void *)head, ntohs(lport), port_reuse_active);
3140         /* set in the port */
3141         inp->sctp_lport = lport;
3142
3143         /* turn off just the unbound flag */
3144         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3145         SCTP_INP_WUNLOCK(inp);
3146         SCTP_INP_INFO_WUNLOCK();
3147         return (0);
3148 }
3149
3150
3151 static void
3152 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3153 {
3154         struct sctp_iterator *it, *nit;
3155
3156         /*
3157          * We enter with the only the ITERATOR_LOCK in place and a write
3158          * lock on the inp_info stuff.
3159          */
3160         it = sctp_it_ctl.cur_it;
3161         if (it && (it->vn != curvnet)) {
3162                 /* Its not looking at our VNET */
3163                 return;
3164         }
3165         if (it && (it->inp == inp)) {
3166                 /*
3167                  * This is tricky and we hold the iterator lock, but when it
3168                  * returns and gets the lock (when we release it) the
3169                  * iterator will try to operate on inp. We need to stop that
3170                  * from happening. But of course the iterator has a
3171                  * reference on the stcb and inp. We can mark it and it will
3172                  * stop.
3173                  *
3174                  * If its a single iterator situation, we set the end iterator
3175                  * flag. Otherwise we set the iterator to go to the next
3176                  * inp.
3177                  *
3178                  */
3179                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3180                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3181                 } else {
3182                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3183                 }
3184         }
3185         /*
3186          * Now go through and remove any single reference to our inp that
3187          * may be still pending on the list
3188          */
3189         SCTP_IPI_ITERATOR_WQ_LOCK();
3190         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3191                 if (it->vn != curvnet) {
3192                         continue;
3193                 }
3194                 if (it->inp == inp) {
3195                         /* This one points to me is it inp specific? */
3196                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3197                                 /* Remove and free this one */
3198                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3199                                     it, sctp_nxt_itr);
3200                                 if (it->function_atend != NULL) {
3201                                         (*it->function_atend) (it->pointer, it->val);
3202                                 }
3203                                 SCTP_FREE(it, SCTP_M_ITER);
3204                         } else {
3205                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3206                                 if (it->inp) {
3207                                         SCTP_INP_INCR_REF(it->inp);
3208                                 }
3209                         }
3210                         /*
3211                          * When its put in the refcnt is incremented so decr
3212                          * it
3213                          */
3214                         SCTP_INP_DECR_REF(inp);
3215                 }
3216         }
3217         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3218 }
3219
3220 /* release sctp_inpcb unbind the port */
3221 void
3222 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3223 {
3224         /*
3225          * Here we free a endpoint. We must find it (if it is in the Hash
3226          * table) and remove it from there. Then we must also find it in the
3227          * overall list and remove it from there. After all removals are
3228          * complete then any timer has to be stopped. Then start the actual
3229          * freeing. a) Any local lists. b) Any associations. c) The hash of
3230          * all associations. d) finally the ep itself.
3231          */
3232         struct sctp_tcb *asoc, *nasoc;
3233         struct sctp_laddr *laddr, *nladdr;
3234         struct inpcb *ip_pcb;
3235         struct socket *so;
3236         int being_refed = 0;
3237         struct sctp_queued_to_read *sq, *nsq;
3238         int cnt;
3239         sctp_sharedkey_t *shared_key, *nshared_key;
3240
3241
3242 #ifdef SCTP_LOG_CLOSING
3243         sctp_log_closing(inp, NULL, 0);
3244 #endif
3245         SCTP_ITERATOR_LOCK();
3246         /* mark any iterators on the list or being processed */
3247         sctp_iterator_inp_being_freed(inp);
3248         SCTP_ITERATOR_UNLOCK();
3249         so = inp->sctp_socket;
3250         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3251                 /* been here before.. eeks.. get out of here */
3252                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3253 #ifdef SCTP_LOG_CLOSING
3254                 sctp_log_closing(inp, NULL, 1);
3255 #endif
3256                 return;
3257         }
3258         SCTP_ASOC_CREATE_LOCK(inp);
3259         SCTP_INP_INFO_WLOCK();
3260
3261         SCTP_INP_WLOCK(inp);
3262         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3263                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3264                 /* socket is gone, so no more wakeups allowed */
3265                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3266                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3267                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3268
3269         }
3270         /* First time through we have the socket lock, after that no more. */
3271         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3272             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3273
3274         if (inp->control) {
3275                 sctp_m_freem(inp->control);
3276                 inp->control = NULL;
3277         }
3278         if (inp->pkt) {
3279                 sctp_m_freem(inp->pkt);
3280                 inp->pkt = NULL;
3281         }
3282         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3283                                          * here but I will be nice :> (i.e.
3284                                          * ip_pcb = ep;) */
3285         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3286                 int cnt_in_sd;
3287
3288                 cnt_in_sd = 0;
3289                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3290                         SCTP_TCB_LOCK(asoc);
3291                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3292                                 /* Skip guys being freed */
3293                                 cnt_in_sd++;
3294                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3295                                         /*
3296                                          * Special case - we did not start a
3297                                          * kill timer on the asoc due to it
3298                                          * was not closed. So go ahead and
3299                                          * start it now.
3300                                          */
3301                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3302                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3303                                 }
3304                                 SCTP_TCB_UNLOCK(asoc);
3305                                 continue;
3306                         }
3307                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3308                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3309                             (asoc->asoc.total_output_queue_size == 0)) {
3310                                 /*
3311                                  * If we have data in queue, we don't want
3312                                  * to just free since the app may have done,
3313                                  * send()/close or connect/send/close. And
3314                                  * it wants the data to get across first.
3315                                  */
3316                                 /* Just abandon things in the front states */
3317                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3318                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3319                                         cnt_in_sd++;
3320                                 }
3321                                 continue;
3322                         }
3323                         /* Disconnect the socket please */
3324                         asoc->sctp_socket = NULL;
3325                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3326                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3327                             (asoc->asoc.control_pdapi) ||
3328                             (asoc->asoc.size_on_all_streams > 0) ||
3329                             (so && (so->so_rcv.sb_cc > 0))) {
3330                                 /* Left with Data unread */
3331                                 struct mbuf *op_err;
3332
3333                                 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
3334                                     0, M_DONTWAIT, 1, MT_DATA);
3335                                 if (op_err) {
3336                                         /* Fill in the user initiated abort */
3337                                         struct sctp_paramhdr *ph;
3338
3339                                         SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr);
3340                                         ph = mtod(op_err, struct sctp_paramhdr *);
3341                                         ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
3342                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
3343                                 }
3344                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3345                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3346                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3347                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3348                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3349                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3350                                 }
3351                                 if (sctp_free_assoc(inp, asoc,
3352                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3353                                         cnt_in_sd++;
3354                                 }
3355                                 continue;
3356                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3357                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3358                             (asoc->asoc.stream_queue_cnt == 0)) {
3359                                 if (asoc->asoc.locked_on_sending) {
3360                                         goto abort_anyway;
3361                                 }
3362                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3363                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3364                                         struct sctp_nets *netp;
3365
3366                                         /*
3367                                          * there is nothing queued to send,
3368                                          * so I send shutdown
3369                                          */
3370                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3371                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3372                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3373                                         }
3374                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3375                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3376                                         sctp_stop_timers_for_shutdown(asoc);
3377                                         if (asoc->asoc.alternate) {
3378                                                 netp = asoc->asoc.alternate;
3379                                         } else {
3380                                                 netp = asoc->asoc.primary_destination;
3381                                         }
3382                                         sctp_send_shutdown(asoc, netp);
3383                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3384                                             netp);
3385                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3386                                             asoc->asoc.primary_destination);
3387                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3388                                 }
3389                         } else {
3390                                 /* mark into shutdown pending */
3391                                 struct sctp_stream_queue_pending *sp;
3392
3393                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3394                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3395                                     asoc->asoc.primary_destination);
3396                                 if (asoc->asoc.locked_on_sending) {
3397                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3398                                             sctp_streamhead);
3399                                         if (sp == NULL) {
3400                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3401                                                     (void *)asoc->asoc.locked_on_sending,
3402                                                     asoc->asoc.locked_on_sending->stream_no);
3403                                         } else {
3404                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3405                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3406                                         }
3407                                 }
3408                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3409                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3410                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3411                                         struct mbuf *op_err;
3412
3413                         abort_anyway:
3414                                         op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
3415                                             0, M_DONTWAIT, 1, MT_DATA);
3416                                         if (op_err) {
3417                                                 /*
3418                                                  * Fill in the user
3419                                                  * initiated abort
3420                                                  */
3421                                                 struct sctp_paramhdr *ph;
3422
3423                                                 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr);
3424                                                 ph = mtod(op_err, struct sctp_paramhdr *);
3425                                                 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
3426                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3427                                         }
3428                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3429                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3430                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3431                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3432                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3433                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3434                                         }
3435                                         if (sctp_free_assoc(inp, asoc,
3436                                             SCTP_PCBFREE_NOFORCE,
3437                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3438                                                 cnt_in_sd++;
3439                                         }
3440                                         continue;
3441                                 } else {
3442                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3443                                 }
3444                         }
3445                         cnt_in_sd++;
3446                         SCTP_TCB_UNLOCK(asoc);
3447                 }
3448                 /* now is there some left in our SHUTDOWN state? */
3449                 if (cnt_in_sd) {
3450 #ifdef SCTP_LOG_CLOSING
3451                         sctp_log_closing(inp, NULL, 2);
3452 #endif
3453                         inp->sctp_socket = NULL;
3454                         SCTP_INP_WUNLOCK(inp);
3455                         SCTP_ASOC_CREATE_UNLOCK(inp);
3456                         SCTP_INP_INFO_WUNLOCK();
3457                         return;
3458                 }
3459         }
3460         inp->sctp_socket = NULL;
3461         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3462             SCTP_PCB_FLAGS_UNBOUND) {
3463                 /*
3464                  * ok, this guy has been bound. It's port is somewhere in
3465                  * the SCTP_BASE_INFO(hash table). Remove it!
3466                  */
3467                 LIST_REMOVE(inp, sctp_hash);
3468                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3469         }
3470         /*
3471          * If there is a timer running to kill us, forget it, since it may
3472          * have a contest on the INP lock.. which would cause us to die ...
3473          */
3474         cnt = 0;
3475         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3476                 SCTP_TCB_LOCK(asoc);
3477                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3478                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3479                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3480                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3481                         }
3482                         cnt++;
3483                         SCTP_TCB_UNLOCK(asoc);
3484                         continue;
3485                 }
3486                 /* Free associations that are NOT killing us */
3487                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3488                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3489                         struct mbuf *op_err;
3490
3491                         op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
3492                             0, M_DONTWAIT, 1, MT_DATA);
3493                         if (op_err) {
3494                                 /* Fill in the user initiated abort */
3495                                 struct sctp_paramhdr *ph;
3496
3497                                 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr);
3498                                 ph = mtod(op_err, struct sctp_paramhdr *);
3499                                 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
3500                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3501                         }
3502                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3503                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3504                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3505                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3506                         cnt++;
3507                         SCTP_TCB_UNLOCK(asoc);
3508                         continue;
3509                 }
3510                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3511                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3512                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3513                 }
3514                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3515                         cnt++;
3516                 }
3517         }
3518         if (cnt) {
3519                 /* Ok we have someone out there that will kill us */
3520                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3521 #ifdef SCTP_LOG_CLOSING
3522                 sctp_log_closing(inp, NULL, 3);
3523 #endif
3524                 SCTP_INP_WUNLOCK(inp);
3525                 SCTP_ASOC_CREATE_UNLOCK(inp);
3526                 SCTP_INP_INFO_WUNLOCK();
3527                 return;
3528         }
3529         if (SCTP_INP_LOCK_CONTENDED(inp))
3530                 being_refed++;
3531         if (SCTP_INP_READ_CONTENDED(inp))
3532                 being_refed++;
3533         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3534                 being_refed++;
3535
3536         if ((inp->refcount) ||
3537             (being_refed) ||
3538             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3539                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3540 #ifdef SCTP_LOG_CLOSING
3541                 sctp_log_closing(inp, NULL, 4);
3542 #endif
3543                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3544                 SCTP_INP_WUNLOCK(inp);
3545                 SCTP_ASOC_CREATE_UNLOCK(inp);
3546                 SCTP_INP_INFO_WUNLOCK();
3547                 return;
3548         }
3549         inp->sctp_ep.signature_change.type = 0;
3550         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3551         /*
3552          * Remove it from the list .. last thing we need a lock for.
3553          */
3554         LIST_REMOVE(inp, sctp_list);
3555         SCTP_INP_WUNLOCK(inp);
3556         SCTP_ASOC_CREATE_UNLOCK(inp);
3557         SCTP_INP_INFO_WUNLOCK();
3558         /*
3559          * Now we release all locks. Since this INP cannot be found anymore
3560          * except possibly by the kill timer that might be running. We call
3561          * the drain function here. It should hit the case were it sees the
3562          * ACTIVE flag cleared and exit out freeing us to proceed and
3563          * destroy everything.
3564          */
3565         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3566                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3567         } else {
3568                 /* Probably un-needed */
3569                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3570         }
3571
3572 #ifdef SCTP_LOG_CLOSING
3573         sctp_log_closing(inp, NULL, 5);
3574 #endif
3575
3576
3577         if ((inp->sctp_asocidhash) != NULL) {
3578                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3579                 inp->sctp_asocidhash = NULL;
3580         }
3581         /* sa_ignore FREED_MEMORY */
3582         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3583                 /* Its only abandoned if it had data left */
3584                 if (sq->length)
3585                         SCTP_STAT_INCR(sctps_left_abandon);
3586
3587                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3588                 sctp_free_remote_addr(sq->whoFrom);
3589                 if (so)
3590                         so->so_rcv.sb_cc -= sq->length;
3591                 if (sq->data) {
3592                         sctp_m_freem(sq->data);
3593                         sq->data = NULL;
3594                 }
3595                 /*
3596                  * no need to free the net count, since at this point all
3597                  * assoc's are gone.
3598                  */
3599                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3600                 SCTP_DECR_READQ_COUNT();
3601         }
3602         /* Now the sctp_pcb things */
3603         /*
3604          * free each asoc if it is not already closed/free. we can't use the
3605          * macro here since le_next will get freed as part of the
3606          * sctp_free_assoc() call.
3607          */
3608         if (so) {
3609 #ifdef IPSEC
3610                 ipsec_delete_pcbpolicy(ip_pcb);
3611 #endif                          /* IPSEC */
3612
3613                 /* Unlocks not needed since the socket is gone now */
3614         }
3615         if (ip_pcb->inp_options) {
3616                 (void)sctp_m_free(ip_pcb->inp_options);
3617                 ip_pcb->inp_options = 0;
3618         }
3619 #ifdef INET6
3620         if (ip_pcb->inp_vflag & INP_IPV6) {
3621                 struct in6pcb *in6p;
3622
3623                 in6p = (struct in6pcb *)inp;
3624                 ip6_freepcbopts(in6p->in6p_outputopts);
3625         }
3626 #endif                          /* INET6 */
3627         ip_pcb->inp_vflag = 0;
3628         /* free up authentication fields */
3629         if (inp->sctp_ep.local_auth_chunks != NULL)
3630                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3631         if (inp->sctp_ep.local_hmacs != NULL)
3632                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3633
3634         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3635                 LIST_REMOVE(shared_key, next);
3636                 sctp_free_sharedkey(shared_key);
3637                 /* sa_ignore FREED_MEMORY */
3638         }
3639
3640         /*
3641          * if we have an address list the following will free the list of
3642          * ifaddr's that are set into this ep. Again macro limitations here,
3643          * since the LIST_FOREACH could be a bad idea.
3644          */
3645         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3646                 sctp_remove_laddr(laddr);
3647         }
3648
3649 #ifdef SCTP_TRACK_FREED_ASOCS
3650         /* TEMP CODE */
3651         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3652                 LIST_REMOVE(asoc, sctp_tcblist);
3653                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3654                 SCTP_DECR_ASOC_COUNT();
3655         }
3656         /* *** END TEMP CODE *** */
3657 #endif
3658         /* Now lets see about freeing the EP hash table. */
3659         if (inp->sctp_tcbhash != NULL) {
3660                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3661                 inp->sctp_tcbhash = NULL;
3662         }
3663         /* Now we must put the ep memory back into the zone pool */
3664         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3665         SCTP_INP_LOCK_DESTROY(inp);
3666         SCTP_INP_READ_DESTROY(inp);
3667         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3668         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3669         SCTP_DECR_EP_COUNT();
3670 }
3671
3672
3673 struct sctp_nets *
3674 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3675 {
3676         struct sctp_nets *net;
3677
3678         /* locate the address */
3679         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3680                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3681                         return (net);
3682         }
3683         return (NULL);
3684 }
3685
3686
3687 int
3688 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3689 {
3690         struct sctp_ifa *sctp_ifa;
3691
3692         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3693         if (sctp_ifa) {
3694                 return (1);
3695         } else {
3696                 return (0);
3697         }
3698 }
3699
3700 /*
3701  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3702  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3703  * stats of stuff.
3704  */
3705 int
3706 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3707     struct sctp_nets **netp, int set_scope, int from)
3708 {
3709         /*
3710          * The following is redundant to the same lines in the
3711          * sctp_aloc_assoc() but is needed since others call the add address
3712          * function
3713          */
3714         struct sctp_nets *net, *netfirst;
3715         int addr_inscope;
3716
3717         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3718             from);
3719         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3720
3721         netfirst = sctp_findnet(stcb, newaddr);
3722         if (netfirst) {
3723                 /*
3724                  * Lie and return ok, we don't want to make the association
3725                  * go away for this behavior. It will happen in the TCP
3726                  * model in a connected socket. It does not reach the hash
3727                  * table until after the association is built so it can't be
3728                  * found. Mark as reachable, since the initial creation will
3729                  * have been cleared and the NOT_IN_ASSOC flag will have
3730                  * been added... and we don't want to end up removing it
3731                  * back out.
3732                  */
3733                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3734                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3735                             SCTP_ADDR_UNCONFIRMED);
3736                 } else {
3737                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3738                 }
3739
3740                 return (0);
3741         }
3742         addr_inscope = 1;
3743         switch (newaddr->sa_family) {
3744 #ifdef INET
3745         case AF_INET:
3746                 {
3747                         struct sockaddr_in *sin;
3748
3749                         sin = (struct sockaddr_in *)newaddr;
3750                         if (sin->sin_addr.s_addr == 0) {
3751                                 /* Invalid address */
3752                                 return (-1);
3753                         }
3754                         /* zero out the bzero area */
3755                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3756
3757                         /* assure len is set */
3758                         sin->sin_len = sizeof(struct sockaddr_in);
3759                         if (set_scope) {
3760 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3761                                 stcb->asoc.scope.ipv4_local_scope = 1;
3762 #else
3763                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3764                                         stcb->asoc.scope.ipv4_local_scope = 1;
3765                                 }
3766 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3767                         } else {
3768                                 /* Validate the address is in scope */
3769                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3770                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3771                                         addr_inscope = 0;
3772                                 }
3773                         }
3774                         break;
3775                 }
3776 #endif
3777 #ifdef INET6
3778         case AF_INET6:
3779                 {
3780                         struct sockaddr_in6 *sin6;
3781
3782                         sin6 = (struct sockaddr_in6 *)newaddr;
3783                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3784                                 /* Invalid address */
3785                                 return (-1);
3786                         }
3787                         /* assure len is set */
3788                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3789                         if (set_scope) {
3790                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3791                                         stcb->asoc.scope.loopback_scope = 1;
3792                                         stcb->asoc.scope.local_scope = 0;
3793                                         stcb->asoc.scope.ipv4_local_scope = 1;
3794                                         stcb->asoc.scope.site_scope = 1;
3795                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3796                                         /*
3797                                          * If the new destination is a
3798                                          * LINK_LOCAL we must have common
3799                                          * site scope. Don't set the local
3800                                          * scope since we may not share all
3801                                          * links, only loopback can do this.
3802                                          * Links on the local network would
3803                                          * also be on our private network
3804                                          * for v4 too.
3805                                          */
3806                                         stcb->asoc.scope.ipv4_local_scope = 1;
3807                                         stcb->asoc.scope.site_scope = 1;
3808                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3809                                         /*
3810                                          * If the new destination is
3811                                          * SITE_LOCAL then we must have site
3812                                          * scope in common.
3813                                          */
3814                                         stcb->asoc.scope.site_scope = 1;
3815                                 }
3816                         } else {
3817                                 /* Validate the address is in scope */
3818                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3819                                     (stcb->asoc.scope.loopback_scope == 0)) {
3820                                         addr_inscope = 0;
3821                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3822                                     (stcb->asoc.scope.local_scope == 0)) {
3823                                         addr_inscope = 0;
3824                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3825                                     (stcb->asoc.scope.site_scope == 0)) {
3826                                         addr_inscope = 0;
3827                                 }
3828                         }
3829                         break;
3830                 }
3831 #endif
3832         default:
3833                 /* not supported family type */
3834                 return (-1);
3835         }
3836         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3837         if (net == NULL) {
3838                 return (-1);
3839         }
3840         SCTP_INCR_RADDR_COUNT();
3841         bzero(net, sizeof(struct sctp_nets));
3842         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3843         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3844         switch (newaddr->sa_family) {
3845 #ifdef INET
3846         case AF_INET:
3847                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3848                 break;
3849 #endif
3850 #ifdef INET6
3851         case AF_INET6:
3852                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3853                 break;
3854 #endif
3855         default:
3856                 break;
3857         }
3858         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3859         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3860                 stcb->asoc.scope.loopback_scope = 1;
3861                 stcb->asoc.scope.ipv4_local_scope = 1;
3862                 stcb->asoc.scope.local_scope = 0;
3863                 stcb->asoc.scope.site_scope = 1;
3864                 addr_inscope = 1;
3865         }
3866         net->failure_threshold = stcb->asoc.def_net_failure;
3867         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3868         if (addr_inscope == 0) {
3869                 net->dest_state = (SCTP_ADDR_REACHABLE |
3870                     SCTP_ADDR_OUT_OF_SCOPE);
3871         } else {
3872                 if (from == SCTP_ADDR_IS_CONFIRMED)
3873                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3874                         net->dest_state = SCTP_ADDR_REACHABLE;
3875                 else
3876                         net->dest_state = SCTP_ADDR_REACHABLE |
3877                             SCTP_ADDR_UNCONFIRMED;
3878         }
3879         /*
3880          * We set this to 0, the timer code knows that this means its an
3881          * initial value
3882          */
3883         net->rto_needed = 1;
3884         net->RTO = 0;
3885         net->RTO_measured = 0;
3886         stcb->asoc.numnets++;
3887         net->ref_count = 1;
3888         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3889         net->port = stcb->asoc.port;
3890         net->dscp = stcb->asoc.default_dscp;
3891 #ifdef INET6
3892         net->flowlabel = stcb->asoc.default_flowlabel;
3893 #endif
3894         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3895                 net->dest_state |= SCTP_ADDR_NOHB;
3896         } else {
3897                 net->dest_state &= ~SCTP_ADDR_NOHB;
3898         }
3899         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3900                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3901         } else {
3902                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3903         }
3904         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3905         /* Init the timer structure */
3906         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3907         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3908         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3909
3910         /* Now generate a route for this guy */
3911 #ifdef INET6
3912         /* KAME hack: embed scopeid */
3913         if (newaddr->sa_family == AF_INET6) {
3914                 struct sockaddr_in6 *sin6;
3915
3916                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3917                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3918                 sin6->sin6_scope_id = 0;
3919         }
3920 #endif
3921         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3922
3923         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3924                 /* Get source address */
3925                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3926                     stcb,
3927                     (sctp_route_t *) & net->ro,
3928                     net,
3929                     0,
3930                     stcb->asoc.vrf_id);
3931                 /* Now get the interface MTU */
3932                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3933                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3934                 }
3935                 if (net->mtu > 0) {
3936                         uint32_t rmtu;
3937
3938                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3939                         if (rmtu == 0) {
3940                                 /*
3941                                  * Start things off to match mtu of
3942                                  * interface please.
3943                                  */
3944                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3945                                     net->ro.ro_rt, net->mtu);
3946                         } else {
3947                                 /*
3948                                  * we take the route mtu over the interface,
3949                                  * since the route may be leading out the
3950                                  * loopback, or a different interface.
3951                                  */
3952                                 net->mtu = rmtu;
3953                         }
3954                 }
3955         }
3956         if (net->mtu == 0) {
3957                 switch (newaddr->sa_family) {
3958 #ifdef INET
3959                 case AF_INET:
3960                         net->mtu = SCTP_DEFAULT_MTU;
3961                         break;
3962 #endif
3963 #ifdef INET6
3964                 case AF_INET6:
3965                         net->mtu = 1280;
3966                         break;
3967 #endif
3968                 default:
3969                         break;
3970                 }
3971         }
3972         if (net->port) {
3973                 net->mtu -= (uint32_t) sizeof(struct udphdr);
3974         }
3975         if (from == SCTP_ALLOC_ASOC) {
3976                 stcb->asoc.smallest_mtu = net->mtu;
3977         }
3978         if (stcb->asoc.smallest_mtu > net->mtu) {
3979                 stcb->asoc.smallest_mtu = net->mtu;
3980         }
3981 #ifdef INET6
3982         if (newaddr->sa_family == AF_INET6) {
3983                 struct sockaddr_in6 *sin6;
3984
3985                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3986                 (void)sa6_recoverscope(sin6);
3987         }
3988 #endif
3989
3990         /* JRS - Use the congestion control given in the CC module */
3991         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
3992                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
3993
3994         /*
3995          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3996          * of assoc (2005/06/27, iyengar@cis.udel.edu)
3997          */
3998         net->find_pseudo_cumack = 1;
3999         net->find_rtx_pseudo_cumack = 1;
4000         net->src_addr_selected = 0;
4001         /* Choose an initial flowid. */
4002         net->flowid = stcb->asoc.my_vtag ^
4003             ntohs(stcb->rport) ^
4004             ntohs(stcb->sctp_ep->sctp_lport);
4005 #ifdef INVARIANTS
4006         net->flowidset = 1;
4007 #endif
4008         if (netp) {
4009                 *netp = net;
4010         }
4011         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4012         if (net->ro.ro_rt == NULL) {
4013                 /* Since we have no route put it at the back */
4014                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4015         } else if (netfirst == NULL) {
4016                 /* We are the first one in the pool. */
4017                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4018         } else if (netfirst->ro.ro_rt == NULL) {
4019                 /*
4020                  * First one has NO route. Place this one ahead of the first
4021                  * one.
4022                  */
4023                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4024         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4025                 /*
4026                  * This one has a different interface than the one at the
4027                  * top of the list. Place it ahead.
4028                  */
4029                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4030         } else {
4031                 /*
4032                  * Ok we have the same interface as the first one. Move
4033                  * forward until we find either a) one with a NULL route...
4034                  * insert ahead of that b) one with a different ifp.. insert
4035                  * after that. c) end of the list.. insert at the tail.
4036                  */
4037                 struct sctp_nets *netlook;
4038
4039                 do {
4040                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4041                         if (netlook == NULL) {
4042                                 /* End of the list */
4043                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4044                                 break;
4045                         } else if (netlook->ro.ro_rt == NULL) {
4046                                 /* next one has NO route */
4047                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4048                                 break;
4049                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4050                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4051                                     net, sctp_next);
4052                                 break;
4053                         }
4054                         /* Shift forward */
4055                         netfirst = netlook;
4056                 } while (netlook != NULL);
4057         }
4058
4059         /* got to have a primary set */
4060         if (stcb->asoc.primary_destination == 0) {
4061                 stcb->asoc.primary_destination = net;
4062         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4063                     (net->ro.ro_rt) &&
4064             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4065                 /* No route to current primary adopt new primary */
4066                 stcb->asoc.primary_destination = net;
4067         }
4068         /* Validate primary is first */
4069         net = TAILQ_FIRST(&stcb->asoc.nets);
4070         if ((net != stcb->asoc.primary_destination) &&
4071             (stcb->asoc.primary_destination)) {
4072                 /*
4073                  * first one on the list is NOT the primary sctp_cmpaddr()
4074                  * is much more efficient if the primary is the first on the
4075                  * list, make it so.
4076                  */
4077                 TAILQ_REMOVE(&stcb->asoc.nets,
4078                     stcb->asoc.primary_destination, sctp_next);
4079                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4080                     stcb->asoc.primary_destination, sctp_next);
4081         }
4082         return (0);
4083 }
4084
4085
4086 static uint32_t
4087 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4088 {
4089         uint32_t id;
4090         struct sctpasochead *head;
4091         struct sctp_tcb *lstcb;
4092
4093         SCTP_INP_WLOCK(inp);
4094 try_again:
4095         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4096                 /* TSNH */
4097                 SCTP_INP_WUNLOCK(inp);
4098                 return (0);
4099         }
4100         /*
4101          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4102          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4103          */
4104         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4105                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4106         }
4107         id = inp->sctp_associd_counter;
4108         inp->sctp_associd_counter++;
4109         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4110         if (lstcb) {
4111                 goto try_again;
4112         }
4113         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4114         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4115         stcb->asoc.in_asocid_hash = 1;
4116         SCTP_INP_WUNLOCK(inp);
4117         return id;
4118 }
4119
4120 /*
4121  * allocate an association and add it to the endpoint. The caller must be
4122  * careful to add all additional addresses once they are know right away or
4123  * else the assoc will be may experience a blackout scenario.
4124  */
4125 struct sctp_tcb *
4126 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4127     int *error, uint32_t override_tag, uint32_t vrf_id,
4128     struct thread *p
4129 )
4130 {
4131         /* note the p argument is only valid in unbound sockets */
4132
4133         struct sctp_tcb *stcb;
4134         struct sctp_association *asoc;
4135         struct sctpasochead *head;
4136         uint16_t rport;
4137         int err;
4138
4139         /*
4140          * Assumption made here: Caller has done a
4141          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4142          * address does not exist already.
4143          */
4144         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4145                 /* Hit max assoc, sorry no more */
4146                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4147                 *error = ENOBUFS;
4148                 return (NULL);
4149         }
4150         if (firstaddr == NULL) {
4151                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4152                 *error = EINVAL;
4153                 return (NULL);
4154         }
4155         SCTP_INP_RLOCK(inp);
4156         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4157             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4158             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4159                 /*
4160                  * If its in the TCP pool, its NOT allowed to create an
4161                  * association. The parent listener needs to call
4162                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4163                  * off, or connected one does this.. its an error.
4164                  */
4165                 SCTP_INP_RUNLOCK(inp);
4166                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4167                 *error = EINVAL;
4168                 return (NULL);
4169         }
4170         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4171             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4172                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4173                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4174                         SCTP_INP_RUNLOCK(inp);
4175                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4176                         *error = EINVAL;
4177                         return (NULL);
4178                 }
4179         }
4180         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4181 #ifdef SCTP_DEBUG
4182         if (firstaddr) {
4183                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4184                 switch (firstaddr->sa_family) {
4185 #ifdef INET
4186                 case AF_INET:
4187                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4188                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4189                         break;
4190 #endif
4191 #ifdef INET6
4192                 case AF_INET6:
4193                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4194                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4195                         break;
4196 #endif
4197                 default:
4198                         break;
4199                 }
4200         } else {
4201                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4202         }
4203 #endif                          /* SCTP_DEBUG */
4204         switch (firstaddr->sa_family) {
4205 #ifdef INET
4206         case AF_INET:
4207                 {
4208                         struct sockaddr_in *sin;
4209
4210                         sin = (struct sockaddr_in *)firstaddr;
4211                         if ((ntohs(sin->sin_port) == 0) ||
4212                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4213                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4214                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4215                                 /* Invalid address */
4216                                 SCTP_INP_RUNLOCK(inp);
4217                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4218                                 *error = EINVAL;
4219                                 return (NULL);
4220                         }
4221                         rport = sin->sin_port;
4222                         break;
4223                 }
4224 #endif
4225 #ifdef INET6
4226         case AF_INET6:
4227                 {
4228                         struct sockaddr_in6 *sin6;
4229
4230                         sin6 = (struct sockaddr_in6 *)firstaddr;
4231                         if ((ntohs(sin6->sin6_port) == 0) ||
4232                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4233                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4234                                 /* Invalid address */
4235                                 SCTP_INP_RUNLOCK(inp);
4236                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4237                                 *error = EINVAL;
4238                                 return (NULL);
4239                         }
4240                         rport = sin6->sin6_port;
4241                         break;
4242                 }
4243 #endif
4244         default:
4245                 /* not supported family type */
4246                 SCTP_INP_RUNLOCK(inp);
4247                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4248                 *error = EINVAL;
4249                 return (NULL);
4250         }
4251         SCTP_INP_RUNLOCK(inp);
4252         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4253                 /*
4254                  * If you have not performed a bind, then we need to do the
4255                  * ephemeral bind for you.
4256                  */
4257                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4258                     (struct sockaddr *)NULL,
4259                     (struct sctp_ifa *)NULL,
4260                     p
4261                     ))) {
4262                         /* bind error, probably perm */
4263                         *error = err;
4264                         return (NULL);
4265                 }
4266         }
4267         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4268         if (stcb == NULL) {
4269                 /* out of memory? */
4270                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4271                 *error = ENOMEM;
4272                 return (NULL);
4273         }
4274         SCTP_INCR_ASOC_COUNT();
4275
4276         bzero(stcb, sizeof(*stcb));
4277         asoc = &stcb->asoc;
4278
4279         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4280         SCTP_TCB_LOCK_INIT(stcb);
4281         SCTP_TCB_SEND_LOCK_INIT(stcb);
4282         stcb->rport = rport;
4283         /* setup back pointer's */
4284         stcb->sctp_ep = inp;
4285         stcb->sctp_socket = inp->sctp_socket;
4286         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4287                 /* failed */
4288                 SCTP_TCB_LOCK_DESTROY(stcb);
4289                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4290                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4291                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4292                 SCTP_DECR_ASOC_COUNT();
4293                 *error = err;
4294                 return (NULL);
4295         }
4296         /* and the port */
4297         SCTP_INP_INFO_WLOCK();
4298         SCTP_INP_WLOCK(inp);
4299         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4300                 /* inpcb freed while alloc going on */
4301                 SCTP_TCB_LOCK_DESTROY(stcb);
4302                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4303                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4304                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4305                 SCTP_INP_WUNLOCK(inp);
4306                 SCTP_INP_INFO_WUNLOCK();
4307                 SCTP_DECR_ASOC_COUNT();
4308                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4309                 *error = EINVAL;
4310                 return (NULL);
4311         }
4312         SCTP_TCB_LOCK(stcb);
4313
4314         /* now that my_vtag is set, add it to the hash */
4315         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4316         /* put it in the bucket in the vtag hash of assoc's for the system */
4317         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4318         SCTP_INP_INFO_WUNLOCK();
4319
4320         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4321                 /* failure.. memory error? */
4322                 if (asoc->strmout) {
4323                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4324                         asoc->strmout = NULL;
4325                 }
4326                 if (asoc->mapping_array) {
4327                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4328                         asoc->mapping_array = NULL;
4329                 }
4330                 if (asoc->nr_mapping_array) {
4331                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4332                         asoc->nr_mapping_array = NULL;
4333                 }
4334                 SCTP_DECR_ASOC_COUNT();
4335                 SCTP_TCB_UNLOCK(stcb);
4336                 SCTP_TCB_LOCK_DESTROY(stcb);
4337                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4338                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4339                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4340                 SCTP_INP_WUNLOCK(inp);
4341                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4342                 *error = ENOBUFS;
4343                 return (NULL);
4344         }
4345         /* Init all the timers */
4346         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4347         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4348         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4349         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4350         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4351         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4352         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4353
4354         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4355         /* now file the port under the hash as well */
4356         if (inp->sctp_tcbhash != NULL) {
4357                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4358                     inp->sctp_hashmark)];
4359                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4360         }
4361         SCTP_INP_WUNLOCK(inp);
4362         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4363         return (stcb);
4364 }
4365
4366
4367 void
4368 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4369 {
4370         struct sctp_association *asoc;
4371
4372         asoc = &stcb->asoc;
4373         asoc->numnets--;
4374         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4375         if (net == asoc->primary_destination) {
4376                 /* Reset primary */
4377                 struct sctp_nets *lnet;
4378
4379                 lnet = TAILQ_FIRST(&asoc->nets);
4380                 /*
4381                  * Mobility adaptation Ideally, if deleted destination is
4382                  * the primary, it becomes a fast retransmission trigger by
4383                  * the subsequent SET PRIMARY. (by micchie)
4384                  */
4385                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4386                     SCTP_MOBILITY_BASE) ||
4387                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4388                     SCTP_MOBILITY_FASTHANDOFF)) {
4389                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4390                         if (asoc->deleted_primary != NULL) {
4391                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4392                                 goto out;
4393                         }
4394                         asoc->deleted_primary = net;
4395                         atomic_add_int(&net->ref_count, 1);
4396                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4397                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4398                         sctp_mobility_feature_on(stcb->sctp_ep,
4399                             SCTP_MOBILITY_PRIM_DELETED);
4400                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4401                             stcb->sctp_ep, stcb, NULL);
4402                 }
4403 out:
4404                 /* Try to find a confirmed primary */
4405                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4406         }
4407         if (net == asoc->last_data_chunk_from) {
4408                 /* Reset primary */
4409                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4410         }
4411         if (net == asoc->last_control_chunk_from) {
4412                 /* Clear net */
4413                 asoc->last_control_chunk_from = NULL;
4414         }
4415         if (net == stcb->asoc.alternate) {
4416                 sctp_free_remote_addr(stcb->asoc.alternate);
4417                 stcb->asoc.alternate = NULL;
4418         }
4419         sctp_free_remote_addr(net);
4420 }
4421
4422 /*
4423  * remove a remote endpoint address from an association, it will fail if the
4424  * address does not exist.
4425  */
4426 int
4427 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4428 {
4429         /*
4430          * Here we need to remove a remote address. This is quite simple, we
4431          * first find it in the list of address for the association
4432          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4433          * on that item. Note we do not allow it to be removed if there are
4434          * no other addresses.
4435          */
4436         struct sctp_association *asoc;
4437         struct sctp_nets *net, *nnet;
4438
4439         asoc = &stcb->asoc;
4440
4441         /* locate the address */
4442         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4443                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4444                         continue;
4445                 }
4446                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4447                     remaddr)) {
4448                         /* we found the guy */
4449                         if (asoc->numnets < 2) {
4450                                 /* Must have at LEAST two remote addresses */
4451                                 return (-1);
4452                         } else {
4453                                 sctp_remove_net(stcb, net);
4454                                 return (0);
4455                         }
4456                 }
4457         }
4458         /* not found. */
4459         return (-2);
4460 }
4461
4462 void
4463 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4464 {
4465         struct sctpvtaghead *chain;
4466         struct sctp_tagblock *twait_block;
4467         int found = 0;
4468         int i;
4469
4470         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4471         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4472                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4473                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4474                             (twait_block->vtag_block[i].lport == lport) &&
4475                             (twait_block->vtag_block[i].rport == rport)) {
4476                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4477                                 twait_block->vtag_block[i].v_tag = 0;
4478                                 twait_block->vtag_block[i].lport = 0;
4479                                 twait_block->vtag_block[i].rport = 0;
4480                                 found = 1;
4481                                 break;
4482                         }
4483                 }
4484                 if (found)
4485                         break;
4486         }
4487 }
4488
4489 int
4490 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4491 {
4492         struct sctpvtaghead *chain;
4493         struct sctp_tagblock *twait_block;
4494         int found = 0;
4495         int i;
4496
4497         SCTP_INP_INFO_WLOCK();
4498         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4499         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4500                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4501                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4502                             (twait_block->vtag_block[i].lport == lport) &&
4503                             (twait_block->vtag_block[i].rport == rport)) {
4504                                 found = 1;
4505                                 break;
4506                         }
4507                 }
4508                 if (found)
4509                         break;
4510         }
4511         SCTP_INP_INFO_WUNLOCK();
4512         return (found);
4513 }
4514
4515
4516 void
4517 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4518 {
4519         struct sctpvtaghead *chain;
4520         struct sctp_tagblock *twait_block;
4521         struct timeval now;
4522         int set, i;
4523
4524         if (time == 0) {
4525                 /* Its disabled */
4526                 return;
4527         }
4528         (void)SCTP_GETTIME_TIMEVAL(&now);
4529         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4530         set = 0;
4531         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4532                 /* Block(s) present, lets find space, and expire on the fly */
4533                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4534                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4535                             !set) {
4536                                 twait_block->vtag_block[i].tv_sec_at_expire =
4537                                     now.tv_sec + time;
4538                                 twait_block->vtag_block[i].v_tag = tag;
4539                                 twait_block->vtag_block[i].lport = lport;
4540                                 twait_block->vtag_block[i].rport = rport;
4541                                 set = 1;
4542                         } else if ((twait_block->vtag_block[i].v_tag) &&
4543                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4544                                 /* Audit expires this guy */
4545                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4546                                 twait_block->vtag_block[i].v_tag = 0;
4547                                 twait_block->vtag_block[i].lport = 0;
4548                                 twait_block->vtag_block[i].rport = 0;
4549                                 if (set == 0) {
4550                                         /* Reuse it for my new tag */
4551                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4552                                         twait_block->vtag_block[i].v_tag = tag;
4553                                         twait_block->vtag_block[i].lport = lport;
4554                                         twait_block->vtag_block[i].rport = rport;
4555                                         set = 1;
4556                                 }
4557                         }
4558                 }
4559                 if (set) {
4560                         /*
4561                          * We only do up to the block where we can place our
4562                          * tag for audits
4563                          */
4564                         break;
4565                 }
4566         }
4567         /* Need to add a new block to chain */
4568         if (!set) {
4569                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4570                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4571                 if (twait_block == NULL) {
4572 #ifdef INVARIANTS
4573                         panic("Can not alloc tagblock");
4574 #endif
4575                         return;
4576                 }
4577                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4578                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4579                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4580                 twait_block->vtag_block[0].v_tag = tag;
4581                 twait_block->vtag_block[0].lport = lport;
4582                 twait_block->vtag_block[0].rport = rport;
4583         }
4584 }
4585
4586
4587
4588 /*-
4589  * Free the association after un-hashing the remote port. This
4590  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4591  * expect that the input to this function IS a locked TCB.
4592  * It will return 0, if it did NOT destroy the association (instead
4593  * it unlocks it. It will return NON-zero if it either destroyed the
4594  * association OR the association is already destroyed.
4595  */
4596 int
4597 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4598 {
4599         int i;
4600         struct sctp_association *asoc;
4601         struct sctp_nets *net, *nnet;
4602         struct sctp_laddr *laddr, *naddr;
4603         struct sctp_tmit_chunk *chk, *nchk;
4604         struct sctp_asconf_addr *aparam, *naparam;
4605         struct sctp_asconf_ack *aack, *naack;
4606         struct sctp_stream_reset_list *strrst, *nstrrst;
4607         struct sctp_queued_to_read *sq, *nsq;
4608         struct sctp_stream_queue_pending *sp, *nsp;
4609         sctp_sharedkey_t *shared_key, *nshared_key;
4610         struct socket *so;
4611
4612         /* first, lets purge the entry from the hash table. */
4613
4614 #ifdef SCTP_LOG_CLOSING
4615         sctp_log_closing(inp, stcb, 6);
4616 #endif
4617         if (stcb->asoc.state == 0) {
4618 #ifdef SCTP_LOG_CLOSING
4619                 sctp_log_closing(inp, NULL, 7);
4620 #endif
4621                 /* there is no asoc, really TSNH :-0 */
4622                 return (1);
4623         }
4624         if (stcb->asoc.alternate) {
4625                 sctp_free_remote_addr(stcb->asoc.alternate);
4626                 stcb->asoc.alternate = NULL;
4627         }
4628         /* TEMP CODE */
4629         if (stcb->freed_from_where == 0) {
4630                 /* Only record the first place free happened from */
4631                 stcb->freed_from_where = from_location;
4632         }
4633         /* TEMP CODE */
4634
4635         asoc = &stcb->asoc;
4636         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4637             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4638                 /* nothing around */
4639                 so = NULL;
4640         else
4641                 so = inp->sctp_socket;
4642
4643         /*
4644          * We used timer based freeing if a reader or writer is in the way.
4645          * So we first check if we are actually being called from a timer,
4646          * if so we abort early if a reader or writer is still in the way.
4647          */
4648         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4649             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4650                 /*
4651                  * is it the timer driving us? if so are the reader/writers
4652                  * gone?
4653                  */
4654                 if (stcb->asoc.refcnt) {
4655                         /* nope, reader or writer in the way */
4656                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4657                         /* no asoc destroyed */
4658                         SCTP_TCB_UNLOCK(stcb);
4659 #ifdef SCTP_LOG_CLOSING
4660                         sctp_log_closing(inp, stcb, 8);
4661 #endif
4662                         return (0);
4663                 }
4664         }
4665         /* now clean up any other timers */
4666         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4667         asoc->dack_timer.self = NULL;
4668         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4669         /*-
4670          * For stream reset we don't blast this unless
4671          * it is a str-reset timer, it might be the
4672          * free-asoc timer which we DON'T want to
4673          * disturb.
4674          */
4675         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4676                 asoc->strreset_timer.self = NULL;
4677         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4678         asoc->asconf_timer.self = NULL;
4679         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4680         asoc->autoclose_timer.self = NULL;
4681         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4682         asoc->shut_guard_timer.self = NULL;
4683         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4684         asoc->delayed_event_timer.self = NULL;
4685         /* Mobility adaptation */
4686         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4687         asoc->delete_prim_timer.self = NULL;
4688         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4689                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4690                 net->rxt_timer.self = NULL;
4691                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4692                 net->pmtu_timer.self = NULL;
4693                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4694                 net->hb_timer.self = NULL;
4695         }
4696         /* Now the read queue needs to be cleaned up (only once) */
4697         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4698                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4699                 SCTP_INP_READ_LOCK(inp);
4700                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4701                         if (sq->stcb == stcb) {
4702                                 sq->do_not_ref_stcb = 1;
4703                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4704                                 /*
4705                                  * If there is no end, there never will be
4706                                  * now.
4707                                  */
4708                                 if (sq->end_added == 0) {
4709                                         /* Held for PD-API clear that. */
4710                                         sq->pdapi_aborted = 1;
4711                                         sq->held_length = 0;
4712                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4713                                                 /*
4714                                                  * Need to add a PD-API
4715                                                  * aborted indication.
4716                                                  * Setting the control_pdapi
4717                                                  * assures that it will be
4718                                                  * added right after this
4719                                                  * msg.
4720                                                  */
4721                                                 uint32_t strseq;
4722
4723                                                 stcb->asoc.control_pdapi = sq;
4724                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4725                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4726                                                     stcb,
4727                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4728                                                     (void *)&strseq,
4729                                                     SCTP_SO_LOCKED);
4730                                                 stcb->asoc.control_pdapi = NULL;
4731                                         }
4732                                 }
4733                                 /* Add an end to wake them */
4734                                 sq->end_added = 1;
4735                         }
4736                 }
4737                 SCTP_INP_READ_UNLOCK(inp);
4738                 if (stcb->block_entry) {
4739                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4740                         stcb->block_entry->error = ECONNRESET;
4741                         stcb->block_entry = NULL;
4742                 }
4743         }
4744         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4745                 /*
4746                  * Someone holds a reference OR the socket is unaccepted
4747                  * yet.
4748                  */
4749                 if ((stcb->asoc.refcnt) ||
4750                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4751                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4752                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4753                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4754                 }
4755                 SCTP_TCB_UNLOCK(stcb);
4756                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4757                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4758                         /* nothing around */
4759                         so = NULL;
4760                 if (so) {
4761                         /* Wake any reader/writers */
4762                         sctp_sorwakeup(inp, so);
4763                         sctp_sowwakeup(inp, so);
4764                 }
4765 #ifdef SCTP_LOG_CLOSING
4766                 sctp_log_closing(inp, stcb, 9);
4767 #endif
4768                 /* no asoc destroyed */
4769                 return (0);
4770         }
4771 #ifdef SCTP_LOG_CLOSING
4772         sctp_log_closing(inp, stcb, 10);
4773 #endif
4774         /*
4775          * When I reach here, no others want to kill the assoc yet.. and I
4776          * own the lock. Now its possible an abort comes in when I do the
4777          * lock exchange below to grab all the locks to do the final take
4778          * out. to prevent this we increment the count, which will start a
4779          * timer and blow out above thus assuring us that we hold exclusive
4780          * killing of the asoc. Note that after getting back the TCB lock we
4781          * will go ahead and increment the counter back up and stop any
4782          * timer a passing stranger may have started :-S
4783          */
4784         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4785                 atomic_add_int(&stcb->asoc.refcnt, 1);
4786
4787                 SCTP_TCB_UNLOCK(stcb);
4788                 SCTP_INP_INFO_WLOCK();
4789                 SCTP_INP_WLOCK(inp);
4790                 SCTP_TCB_LOCK(stcb);
4791         }
4792         /* Double check the GONE flag */
4793         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4794             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4795                 /* nothing around */
4796                 so = NULL;
4797
4798         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4799             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4800                 /*
4801                  * For TCP type we need special handling when we are
4802                  * connected. We also include the peel'ed off ones to.
4803                  */
4804                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4805                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4806                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4807                         if (so) {
4808                                 SOCK_LOCK(so);
4809                                 if (so->so_rcv.sb_cc == 0) {
4810                                         so->so_state &= ~(SS_ISCONNECTING |
4811                                             SS_ISDISCONNECTING |
4812                                             SS_ISCONFIRMING |
4813                                             SS_ISCONNECTED);
4814                                 }
4815                                 socantrcvmore_locked(so);
4816                                 sctp_sowwakeup(inp, so);
4817                                 sctp_sorwakeup(inp, so);
4818                                 SCTP_SOWAKEUP(so);
4819                         }
4820                 }
4821         }
4822         /*
4823          * Make it invalid too, that way if its about to run it will abort
4824          * and return.
4825          */
4826         /* re-increment the lock */
4827         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4828                 atomic_add_int(&stcb->asoc.refcnt, -1);
4829         }
4830         if (stcb->asoc.refcnt) {
4831                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4832                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4833                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4834                         SCTP_INP_INFO_WUNLOCK();
4835                         SCTP_INP_WUNLOCK(inp);
4836                 }
4837                 SCTP_TCB_UNLOCK(stcb);
4838                 return (0);
4839         }
4840         asoc->state = 0;
4841         if (inp->sctp_tcbhash) {
4842                 LIST_REMOVE(stcb, sctp_tcbhash);
4843         }
4844         if (stcb->asoc.in_asocid_hash) {
4845                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4846         }
4847         /* Now lets remove it from the list of ALL associations in the EP */
4848         LIST_REMOVE(stcb, sctp_tcblist);
4849         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4850                 SCTP_INP_INCR_REF(inp);
4851                 SCTP_INP_WUNLOCK(inp);
4852         }
4853         /* pull from vtag hash */
4854         LIST_REMOVE(stcb, sctp_asocs);
4855         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4856             inp->sctp_lport, stcb->rport);
4857
4858         /*
4859          * Now restop the timers to be sure this is paranoia at is finest!
4860          */
4861         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4862         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4863         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4864         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4865         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4866         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4867         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4868         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4869                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4870                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4871                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4872         }
4873
4874         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4875         /*
4876          * The chunk lists and such SHOULD be empty but we check them just
4877          * in case.
4878          */
4879         /* anything on the wheel needs to be removed */
4880         for (i = 0; i < asoc->streamoutcnt; i++) {
4881                 struct sctp_stream_out *outs;
4882
4883                 outs = &asoc->strmout[i];
4884                 /* now clean up any chunks here */
4885                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4886                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4887                         sctp_free_spbufspace(stcb, asoc, sp);
4888                         if (sp->data) {
4889                                 if (so) {
4890                                         /* Still an open socket - report */
4891                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4892                                             0, (void *)sp, SCTP_SO_LOCKED);
4893                                 }
4894                                 if (sp->data) {
4895                                         sctp_m_freem(sp->data);
4896                                         sp->data = NULL;
4897                                         sp->tail_mbuf = NULL;
4898                                         sp->length = 0;
4899                                 }
4900                         }
4901                         if (sp->net) {
4902                                 sctp_free_remote_addr(sp->net);
4903                                 sp->net = NULL;
4904                         }
4905                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4906                 }
4907         }
4908         /* sa_ignore FREED_MEMORY */
4909         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4910                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4911                 SCTP_FREE(strrst, SCTP_M_STRESET);
4912         }
4913         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4914                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4915                 if (sq->data) {
4916                         sctp_m_freem(sq->data);
4917                         sq->data = NULL;
4918                 }
4919                 sctp_free_remote_addr(sq->whoFrom);
4920                 sq->whoFrom = NULL;
4921                 sq->stcb = NULL;
4922                 /* Free the ctl entry */
4923                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4924                 SCTP_DECR_READQ_COUNT();
4925                 /* sa_ignore FREED_MEMORY */
4926         }
4927         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4928                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4929                 if (chk->data) {
4930                         sctp_m_freem(chk->data);
4931                         chk->data = NULL;
4932                 }
4933                 if (chk->holds_key_ref)
4934                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4935                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4936                 SCTP_DECR_CHK_COUNT();
4937                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4938                 asoc->free_chunk_cnt--;
4939                 /* sa_ignore FREED_MEMORY */
4940         }
4941         /* pending send queue SHOULD be empty */
4942         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4943                 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
4944                         asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
4945 #ifdef INVARIANTS
4946                 } else {
4947                         panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
4948 #endif
4949                 }
4950                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4951                 if (chk->data) {
4952                         if (so) {
4953                                 /* Still a socket? */
4954                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
4955                                     0, chk, SCTP_SO_LOCKED);
4956                         }
4957                         if (chk->data) {
4958                                 sctp_m_freem(chk->data);
4959                                 chk->data = NULL;
4960                         }
4961                 }
4962                 if (chk->holds_key_ref)
4963                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4964                 if (chk->whoTo) {
4965                         sctp_free_remote_addr(chk->whoTo);
4966                         chk->whoTo = NULL;
4967                 }
4968                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4969                 SCTP_DECR_CHK_COUNT();
4970                 /* sa_ignore FREED_MEMORY */
4971         }
4972         /* sent queue SHOULD be empty */
4973         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
4974                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
4975                         if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
4976                                 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
4977 #ifdef INVARIANTS
4978                         } else {
4979                                 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
4980 #endif
4981                         }
4982                 }
4983                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4984                 if (chk->data) {
4985                         if (so) {
4986                                 /* Still a socket? */
4987                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
4988                                     0, chk, SCTP_SO_LOCKED);
4989                         }
4990                         if (chk->data) {
4991                                 sctp_m_freem(chk->data);
4992                                 chk->data = NULL;
4993                         }
4994                 }
4995                 if (chk->holds_key_ref)
4996                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4997                 sctp_free_remote_addr(chk->whoTo);
4998                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4999                 SCTP_DECR_CHK_COUNT();
5000                 /* sa_ignore FREED_MEMORY */
5001         }
5002 #ifdef INVARIANTS
5003         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5004                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5005                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5006                 }
5007         }
5008 #endif
5009         /* control queue MAY not be empty */
5010         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5011                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5012                 if (chk->data) {
5013                         sctp_m_freem(chk->data);
5014                         chk->data = NULL;
5015                 }
5016                 if (chk->holds_key_ref)
5017                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5018                 sctp_free_remote_addr(chk->whoTo);
5019                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5020                 SCTP_DECR_CHK_COUNT();
5021                 /* sa_ignore FREED_MEMORY */
5022         }
5023         /* ASCONF queue MAY not be empty */
5024         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5025                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5026                 if (chk->data) {
5027                         sctp_m_freem(chk->data);
5028                         chk->data = NULL;
5029                 }
5030                 if (chk->holds_key_ref)
5031                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5032                 sctp_free_remote_addr(chk->whoTo);
5033                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5034                 SCTP_DECR_CHK_COUNT();
5035                 /* sa_ignore FREED_MEMORY */
5036         }
5037         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5038                 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5039                 if (chk->data) {
5040                         sctp_m_freem(chk->data);
5041                         chk->data = NULL;
5042                 }
5043                 if (chk->holds_key_ref)
5044                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5045                 sctp_free_remote_addr(chk->whoTo);
5046                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5047                 SCTP_DECR_CHK_COUNT();
5048                 /* sa_ignore FREED_MEMORY */
5049         }
5050
5051         if (asoc->mapping_array) {
5052                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5053                 asoc->mapping_array = NULL;
5054         }
5055         if (asoc->nr_mapping_array) {
5056                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5057                 asoc->nr_mapping_array = NULL;
5058         }
5059         /* the stream outs */
5060         if (asoc->strmout) {
5061                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5062                 asoc->strmout = NULL;
5063         }
5064         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5065         if (asoc->strmin) {
5066                 struct sctp_queued_to_read *ctl, *nctl;
5067
5068                 for (i = 0; i < asoc->streamincnt; i++) {
5069                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5070                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5071                                 sctp_free_remote_addr(ctl->whoFrom);
5072                                 if (ctl->data) {
5073                                         sctp_m_freem(ctl->data);
5074                                         ctl->data = NULL;
5075                                 }
5076                                 /*
5077                                  * We don't free the address here since all
5078                                  * the net's were freed above.
5079                                  */
5080                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5081                                 SCTP_DECR_READQ_COUNT();
5082                         }
5083                 }
5084                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5085                 asoc->strmin = NULL;
5086         }
5087         asoc->streamincnt = 0;
5088         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5089 #ifdef INVARIANTS
5090                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5091                         panic("no net's left alloc'ed, or list points to itself");
5092                 }
5093 #endif
5094                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5095                 sctp_free_remote_addr(net);
5096         }
5097         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5098                 /* sa_ignore FREED_MEMORY */
5099                 sctp_remove_laddr(laddr);
5100         }
5101
5102         /* pending asconf (address) parameters */
5103         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5104                 /* sa_ignore FREED_MEMORY */
5105                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5106                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5107         }
5108         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5109                 /* sa_ignore FREED_MEMORY */
5110                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5111                 if (aack->data != NULL) {
5112                         sctp_m_freem(aack->data);
5113                 }
5114                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5115         }
5116         /* clean up auth stuff */
5117         if (asoc->local_hmacs)
5118                 sctp_free_hmaclist(asoc->local_hmacs);
5119         if (asoc->peer_hmacs)
5120                 sctp_free_hmaclist(asoc->peer_hmacs);
5121
5122         if (asoc->local_auth_chunks)
5123                 sctp_free_chunklist(asoc->local_auth_chunks);
5124         if (asoc->peer_auth_chunks)
5125                 sctp_free_chunklist(asoc->peer_auth_chunks);
5126
5127         sctp_free_authinfo(&asoc->authinfo);
5128
5129         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5130                 LIST_REMOVE(shared_key, next);
5131                 sctp_free_sharedkey(shared_key);
5132                 /* sa_ignore FREED_MEMORY */
5133         }
5134
5135         /* Insert new items here :> */
5136
5137         /* Get rid of LOCK */
5138         SCTP_TCB_UNLOCK(stcb);
5139         SCTP_TCB_LOCK_DESTROY(stcb);
5140         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5141         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5142                 SCTP_INP_INFO_WUNLOCK();
5143                 SCTP_INP_RLOCK(inp);
5144         }
5145 #ifdef SCTP_TRACK_FREED_ASOCS
5146         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5147                 /* now clean up the tasoc itself */
5148                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5149                 SCTP_DECR_ASOC_COUNT();
5150         } else {
5151                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5152         }
5153 #else
5154         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5155         SCTP_DECR_ASOC_COUNT();
5156 #endif
5157         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5158                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5159                         /*
5160                          * If its NOT the inp_free calling us AND sctp_close
5161                          * as been called, we call back...
5162                          */
5163                         SCTP_INP_RUNLOCK(inp);
5164                         /*
5165                          * This will start the kill timer (if we are the
5166                          * last one) since we hold an increment yet. But
5167                          * this is the only safe way to do this since
5168                          * otherwise if the socket closes at the same time
5169                          * we are here we might collide in the cleanup.
5170                          */
5171                         sctp_inpcb_free(inp,
5172                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5173                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5174                         SCTP_INP_DECR_REF(inp);
5175                         goto out_of;
5176                 } else {
5177                         /* The socket is still open. */
5178                         SCTP_INP_DECR_REF(inp);
5179                 }
5180         }
5181         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5182                 SCTP_INP_RUNLOCK(inp);
5183         }
5184 out_of:
5185         /* destroyed the asoc */
5186 #ifdef SCTP_LOG_CLOSING
5187         sctp_log_closing(inp, NULL, 11);
5188 #endif
5189         return (1);
5190 }
5191
5192
5193
5194 /*
5195  * determine if a destination is "reachable" based upon the addresses bound
5196  * to the current endpoint (e.g. only v4 or v6 currently bound)
5197  */
5198 /*
5199  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5200  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5201  * types bound as its endpoint
5202  */
5203 int
5204 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5205 {
5206         struct sctp_inpcb *inp;
5207         int answer;
5208
5209         /*
5210          * No locks here, the TCB, in all cases is already locked and an
5211          * assoc is up. There is either a INP lock by the caller applied (in
5212          * asconf case when deleting an address) or NOT in the HB case,
5213          * however if HB then the INP increment is up and the INP will not
5214          * be removed (on top of the fact that we have a TCB lock). So we
5215          * only want to read the sctp_flags, which is either bound-all or
5216          * not.. no protection needed since once an assoc is up you can't be
5217          * changing your binding.
5218          */
5219         inp = stcb->sctp_ep;
5220         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5221                 /* if bound all, destination is not restricted */
5222                 /*
5223                  * RRS: Question during lock work: Is this correct? If you
5224                  * are bound-all you still might need to obey the V4--V6
5225                  * flags??? IMO this bound-all stuff needs to be removed!
5226                  */
5227                 return (1);
5228         }
5229         /* NOTE: all "scope" checks are done when local addresses are added */
5230         switch (destaddr->sa_family) {
5231 #ifdef INET6
5232         case AF_INET6:
5233                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5234                 break;
5235 #endif
5236 #ifdef INET
5237         case AF_INET:
5238                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5239                 break;
5240 #endif
5241         default:
5242                 /* invalid family, so it's unreachable */
5243                 answer = 0;
5244                 break;
5245         }
5246         return (answer);
5247 }
5248
5249 /*
5250  * update the inp_vflags on an endpoint
5251  */
5252 static void
5253 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5254 {
5255         struct sctp_laddr *laddr;
5256
5257         /* first clear the flag */
5258         inp->ip_inp.inp.inp_vflag = 0;
5259         /* set the flag based on addresses on the ep list */
5260         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5261                 if (laddr->ifa == NULL) {
5262                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5263                             __FUNCTION__);
5264                         continue;
5265                 }
5266                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5267                         continue;
5268                 }
5269                 switch (laddr->ifa->address.sa.sa_family) {
5270 #ifdef INET6
5271                 case AF_INET6:
5272                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5273                         break;
5274 #endif
5275 #ifdef INET
5276                 case AF_INET:
5277                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5278                         break;
5279 #endif
5280                 default:
5281                         break;
5282                 }
5283         }
5284 }
5285
5286 /*
5287  * Add the address to the endpoint local address list There is nothing to be
5288  * done if we are bound to all addresses
5289  */
5290 void
5291 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5292 {
5293         struct sctp_laddr *laddr;
5294         int fnd, error = 0;
5295
5296         fnd = 0;
5297
5298         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5299                 /* You are already bound to all. You have it already */
5300                 return;
5301         }
5302 #ifdef INET6
5303         if (ifa->address.sa.sa_family == AF_INET6) {
5304                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5305                         /* Can't bind a non-useable addr. */
5306                         return;
5307                 }
5308         }
5309 #endif
5310         /* first, is it already present? */
5311         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5312                 if (laddr->ifa == ifa) {
5313                         fnd = 1;
5314                         break;
5315                 }
5316         }
5317
5318         if (fnd == 0) {
5319                 /* Not in the ep list */
5320                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5321                 if (error != 0)
5322                         return;
5323                 inp->laddr_count++;
5324                 /* update inp_vflag flags */
5325                 switch (ifa->address.sa.sa_family) {
5326 #ifdef INET6
5327                 case AF_INET6:
5328                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5329                         break;
5330 #endif
5331 #ifdef INET
5332                 case AF_INET:
5333                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5334                         break;
5335 #endif
5336                 default:
5337                         break;
5338                 }
5339         }
5340         return;
5341 }
5342
5343
5344 /*
5345  * select a new (hopefully reachable) destination net (should only be used
5346  * when we deleted an ep addr that is the only usable source address to reach
5347  * the destination net)
5348  */
5349 static void
5350 sctp_select_primary_destination(struct sctp_tcb *stcb)
5351 {
5352         struct sctp_nets *net;
5353
5354         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5355                 /* for now, we'll just pick the first reachable one we find */
5356                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5357                         continue;
5358                 if (sctp_destination_is_reachable(stcb,
5359                     (struct sockaddr *)&net->ro._l_addr)) {
5360                         /* found a reachable destination */
5361                         stcb->asoc.primary_destination = net;
5362                 }
5363         }
5364         /* I can't there from here! ...we're gonna die shortly... */
5365 }
5366
5367
5368 /*
5369  * Delete the address from the endpoint local address list There is nothing
5370  * to be done if we are bound to all addresses
5371  */
5372 void
5373 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5374 {
5375         struct sctp_laddr *laddr;
5376         int fnd;
5377
5378         fnd = 0;
5379         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5380                 /* You are already bound to all. You have it already */
5381                 return;
5382         }
5383         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5384                 if (laddr->ifa == ifa) {
5385                         fnd = 1;
5386                         break;
5387                 }
5388         }
5389         if (fnd && (inp->laddr_count < 2)) {
5390                 /* can't delete unless there are at LEAST 2 addresses */
5391                 return;
5392         }
5393         if (fnd) {
5394                 /*
5395                  * clean up any use of this address go through our
5396                  * associations and clear any last_used_address that match
5397                  * this one for each assoc, see if a new primary_destination
5398                  * is needed
5399                  */
5400                 struct sctp_tcb *stcb;
5401
5402                 /* clean up "next_addr_touse" */
5403                 if (inp->next_addr_touse == laddr)
5404                         /* delete this address */
5405                         inp->next_addr_touse = NULL;
5406
5407                 /* clean up "last_used_address" */
5408                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5409                         struct sctp_nets *net;
5410
5411                         SCTP_TCB_LOCK(stcb);
5412                         if (stcb->asoc.last_used_address == laddr)
5413                                 /* delete this address */
5414                                 stcb->asoc.last_used_address = NULL;
5415                         /*
5416                          * Now spin through all the nets and purge any ref
5417                          * to laddr
5418                          */
5419                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5420                                 if (net->ro._s_addr &&
5421                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5422                                         /* Yep, purge src address selected */
5423                                         sctp_rtentry_t *rt;
5424
5425                                         /* delete this address if cached */
5426                                         rt = net->ro.ro_rt;
5427                                         if (rt != NULL) {
5428                                                 RTFREE(rt);
5429                                                 net->ro.ro_rt = NULL;
5430                                         }
5431                                         sctp_free_ifa(net->ro._s_addr);
5432                                         net->ro._s_addr = NULL;
5433                                         net->src_addr_selected = 0;
5434                                 }
5435                         }
5436                         SCTP_TCB_UNLOCK(stcb);
5437                 }               /* for each tcb */
5438                 /* remove it from the ep list */
5439                 sctp_remove_laddr(laddr);
5440                 inp->laddr_count--;
5441                 /* update inp_vflag flags */
5442                 sctp_update_ep_vflag(inp);
5443         }
5444         return;
5445 }
5446
5447 /*
5448  * Add the address to the TCB local address restricted list.
5449  * This is a "pending" address list (eg. addresses waiting for an
5450  * ASCONF-ACK response) and cannot be used as a valid source address.
5451  */
5452 void
5453 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5454 {
5455         struct sctp_laddr *laddr;
5456         struct sctpladdr *list;
5457
5458         /*
5459          * Assumes TCB is locked.. and possibly the INP. May need to
5460          * confirm/fix that if we need it and is not the case.
5461          */
5462         list = &stcb->asoc.sctp_restricted_addrs;
5463
5464 #ifdef INET6
5465         if (ifa->address.sa.sa_family == AF_INET6) {
5466                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5467                         /* Can't bind a non-existent addr. */
5468                         return;
5469                 }
5470         }
5471 #endif
5472         /* does the address already exist? */
5473         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5474                 if (laddr->ifa == ifa) {
5475                         return;
5476                 }
5477         }
5478
5479         /* add to the list */
5480         (void)sctp_insert_laddr(list, ifa, 0);
5481         return;
5482 }
5483
5484 /*
5485  * insert an laddr entry with the given ifa for the desired list
5486  */
5487 int
5488 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5489 {
5490         struct sctp_laddr *laddr;
5491
5492         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5493         if (laddr == NULL) {
5494                 /* out of memory? */
5495                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5496                 return (EINVAL);
5497         }
5498         SCTP_INCR_LADDR_COUNT();
5499         bzero(laddr, sizeof(*laddr));
5500         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5501         laddr->ifa = ifa;
5502         laddr->action = act;
5503         atomic_add_int(&ifa->refcount, 1);
5504         /* insert it */
5505         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5506
5507         return (0);
5508 }
5509
5510 /*
5511  * Remove an laddr entry from the local address list (on an assoc)
5512  */
5513 void
5514 sctp_remove_laddr(struct sctp_laddr *laddr)
5515 {
5516
5517         /* remove from the list */
5518         LIST_REMOVE(laddr, sctp_nxt_addr);
5519         sctp_free_ifa(laddr->ifa);
5520         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5521         SCTP_DECR_LADDR_COUNT();
5522 }
5523
5524 /*
5525  * Remove a local address from the TCB local address restricted list
5526  */
5527 void
5528 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5529 {
5530         struct sctp_inpcb *inp;
5531         struct sctp_laddr *laddr;
5532
5533         /*
5534          * This is called by asconf work. It is assumed that a) The TCB is
5535          * locked and b) The INP is locked. This is true in as much as I can
5536          * trace through the entry asconf code where I did these locks.
5537          * Again, the ASCONF code is a bit different in that it does lock
5538          * the INP during its work often times. This must be since we don't
5539          * want other proc's looking up things while what they are looking
5540          * up is changing :-D
5541          */
5542
5543         inp = stcb->sctp_ep;
5544         /* if subset bound and don't allow ASCONF's, can't delete last */
5545         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5546             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5547                 if (stcb->sctp_ep->laddr_count < 2) {
5548                         /* can't delete last address */
5549                         return;
5550                 }
5551         }
5552         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5553                 /* remove the address if it exists */
5554                 if (laddr->ifa == NULL)
5555                         continue;
5556                 if (laddr->ifa == ifa) {
5557                         sctp_remove_laddr(laddr);
5558                         return;
5559                 }
5560         }
5561
5562         /* address not found! */
5563         return;
5564 }
5565
5566 /*
5567  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5568  */
5569 /* sysctl */
5570 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5571 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5572
5573
5574
5575 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5576 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5577 int *sctp_cpuarry = NULL;
5578 void
5579 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5580 {
5581         /* Queue a packet to a processor for the specified core */
5582         struct sctp_mcore_queue *qent;
5583         struct sctp_mcore_ctrl *wkq;
5584         int need_wake = 0;
5585
5586         if (sctp_mcore_workers == NULL) {
5587                 /* Something went way bad during setup */
5588                 sctp_input_with_port(m, off, 0);
5589                 return;
5590         }
5591         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5592             (sizeof(struct sctp_mcore_queue)),
5593             SCTP_M_MCORE);
5594         if (qent == NULL) {
5595                 /* This is trouble  */
5596                 sctp_input_with_port(m, off, 0);
5597                 return;
5598         }
5599         qent->vn = curvnet;
5600         qent->m = m;
5601         qent->off = off;
5602         qent->v6 = 0;
5603         wkq = &sctp_mcore_workers[cpu_to_use];
5604         SCTP_MCORE_QLOCK(wkq);
5605
5606         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5607         if (wkq->running == 0) {
5608                 need_wake = 1;
5609         }
5610         SCTP_MCORE_QUNLOCK(wkq);
5611         if (need_wake) {
5612                 wakeup(&wkq->running);
5613         }
5614 }
5615
5616 static void
5617 sctp_mcore_thread(void *arg)
5618 {
5619
5620         struct sctp_mcore_ctrl *wkq;
5621         struct sctp_mcore_queue *qent;
5622
5623         wkq = (struct sctp_mcore_ctrl *)arg;
5624         struct mbuf *m;
5625         int off, v6;
5626
5627         /* Wait for first tickle */
5628         SCTP_MCORE_LOCK(wkq);
5629         wkq->running = 0;
5630         msleep(&wkq->running,
5631             &wkq->core_mtx,
5632             0, "wait for pkt", 0);
5633         SCTP_MCORE_UNLOCK(wkq);
5634
5635         /* Bind to our cpu */
5636         thread_lock(curthread);
5637         sched_bind(curthread, wkq->cpuid);
5638         thread_unlock(curthread);
5639
5640         /* Now lets start working */
5641         SCTP_MCORE_LOCK(wkq);
5642         /* Now grab lock and go */
5643         for (;;) {
5644                 SCTP_MCORE_QLOCK(wkq);
5645 skip_sleep:
5646                 wkq->running = 1;
5647                 qent = TAILQ_FIRST(&wkq->que);
5648                 if (qent) {
5649                         TAILQ_REMOVE(&wkq->que, qent, next);
5650                         SCTP_MCORE_QUNLOCK(wkq);
5651                         CURVNET_SET(qent->vn);
5652                         m = qent->m;
5653                         off = qent->off;
5654                         v6 = qent->v6;
5655                         SCTP_FREE(qent, SCTP_M_MCORE);
5656                         if (v6 == 0) {
5657                                 sctp_input_with_port(m, off, 0);
5658                         } else {
5659                                 SCTP_PRINTF("V6 not yet supported\n");
5660                                 sctp_m_freem(m);
5661                         }
5662                         CURVNET_RESTORE();
5663                         SCTP_MCORE_QLOCK(wkq);
5664                 }
5665                 wkq->running = 0;
5666                 if (!TAILQ_EMPTY(&wkq->que)) {
5667                         goto skip_sleep;
5668                 }
5669                 SCTP_MCORE_QUNLOCK(wkq);
5670                 msleep(&wkq->running,
5671                     &wkq->core_mtx,
5672                     0, "wait for pkt", 0);
5673         }
5674 }
5675
5676 static void
5677 sctp_startup_mcore_threads(void)
5678 {
5679         int i, cpu;
5680
5681         if (mp_ncpus == 1)
5682                 return;
5683
5684         if (sctp_mcore_workers != NULL) {
5685                 /*
5686                  * Already been here in some previous vnet?
5687                  */
5688                 return;
5689         }
5690         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5691             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5692             SCTP_M_MCORE);
5693         if (sctp_mcore_workers == NULL) {
5694                 /* TSNH I hope */
5695                 return;
5696         }
5697         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5698             sizeof(struct sctp_mcore_ctrl)));
5699         /* Init the structures */
5700         for (i = 0; i <= mp_maxid; i++) {
5701                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5702                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5703                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5704                 sctp_mcore_workers[i].cpuid = i;
5705         }
5706         if (sctp_cpuarry == NULL) {
5707                 SCTP_MALLOC(sctp_cpuarry, int *,
5708                     (mp_ncpus * sizeof(int)),
5709                     SCTP_M_MCORE);
5710                 i = 0;
5711                 CPU_FOREACH(cpu) {
5712                         sctp_cpuarry[i] = cpu;
5713                         i++;
5714                 }
5715         }
5716         /* Now start them all */
5717         CPU_FOREACH(cpu) {
5718                 (void)kproc_create(sctp_mcore_thread,
5719                     (void *)&sctp_mcore_workers[cpu],
5720                     &sctp_mcore_workers[cpu].thread_proc,
5721                     RFPROC,
5722                     SCTP_KTHREAD_PAGES,
5723                     SCTP_MCORE_NAME);
5724
5725         }
5726 }
5727
5728 #endif
5729
5730 void
5731 sctp_pcb_init()
5732 {
5733         /*
5734          * SCTP initialization for the PCB structures should be called by
5735          * the sctp_init() funciton.
5736          */
5737         int i;
5738         struct timeval tv;
5739
5740         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5741                 /* error I was called twice */
5742                 return;
5743         }
5744         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5745
5746 #if defined(SCTP_LOCAL_TRACE_BUF)
5747         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5748 #endif
5749 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5750         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5751             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5752             SCTP_M_MCORE);
5753 #endif
5754         (void)SCTP_GETTIME_TIMEVAL(&tv);
5755 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5756         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5757         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5758         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5759 #else
5760         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5761         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5762         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5763 #endif
5764         /* init the empty list of (All) Endpoints */
5765         LIST_INIT(&SCTP_BASE_INFO(listhead));
5766
5767
5768         /* init the hash table of endpoints */
5769         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5770         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5771         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5772         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5773             &SCTP_BASE_INFO(hashasocmark));
5774         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5775             &SCTP_BASE_INFO(hashmark));
5776         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5777             &SCTP_BASE_INFO(hashtcpmark));
5778         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5779
5780
5781         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5782             &SCTP_BASE_INFO(hashvrfmark));
5783
5784         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5785             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5786         /* init the zones */
5787         /*
5788          * FIX ME: Should check for NULL returns, but if it does fail we are
5789          * doomed to panic anyways... add later maybe.
5790          */
5791         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5792             sizeof(struct sctp_inpcb), maxsockets);
5793
5794         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5795             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5796
5797         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5798             sizeof(struct sctp_laddr),
5799             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5800
5801         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5802             sizeof(struct sctp_nets),
5803             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5804
5805         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5806             sizeof(struct sctp_tmit_chunk),
5807             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5808
5809         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5810             sizeof(struct sctp_queued_to_read),
5811             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5812
5813         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5814             sizeof(struct sctp_stream_queue_pending),
5815             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5816
5817         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5818             sizeof(struct sctp_asconf),
5819             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5820
5821         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5822             sizeof(struct sctp_asconf_ack),
5823             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5824
5825
5826         /* Master Lock INIT for info structure */
5827         SCTP_INP_INFO_LOCK_INIT();
5828         SCTP_STATLOG_INIT_LOCK();
5829
5830         SCTP_IPI_COUNT_INIT();
5831         SCTP_IPI_ADDR_INIT();
5832 #ifdef SCTP_PACKET_LOGGING
5833         SCTP_IP_PKTLOG_INIT();
5834 #endif
5835         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5836
5837         SCTP_WQ_ADDR_INIT();
5838         /* not sure if we need all the counts */
5839         SCTP_BASE_INFO(ipi_count_ep) = 0;
5840         /* assoc/tcb zone info */
5841         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5842         /* local addrlist zone info */
5843         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5844         /* remote addrlist zone info */
5845         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5846         /* chunk info */
5847         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5848
5849         /* socket queue zone info */
5850         SCTP_BASE_INFO(ipi_count_readq) = 0;
5851
5852         /* stream out queue cont */
5853         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5854
5855         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5856         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5857
5858         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5859
5860         /* Init the TIMEWAIT list */
5861         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5862                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5863         }
5864         SCTP_ITERATOR_LOCK_INIT();
5865         SCTP_IPI_ITERATOR_WQ_INIT();
5866         sctp_startup_iterator();
5867
5868 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5869         sctp_startup_mcore_threads();
5870 #endif
5871
5872         /*
5873          * INIT the default VRF which for BSD is the only one, other O/S's
5874          * may have more. But initially they must start with one and then
5875          * add the VRF's as addresses are added.
5876          */
5877         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5878 }
5879
5880 /*
5881  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5882  */
5883 void
5884 sctp_pcb_finish(void)
5885 {
5886         struct sctp_vrflist *vrf_bucket;
5887         struct sctp_vrf *vrf, *nvrf;
5888         struct sctp_ifn *ifn, *nifn;
5889         struct sctp_ifa *ifa, *nifa;
5890         struct sctpvtaghead *chain;
5891         struct sctp_tagblock *twait_block, *prev_twait_block;
5892         struct sctp_laddr *wi, *nwi;
5893         int i;
5894         struct sctp_iterator *it, *nit;
5895
5896         /*
5897          * In FreeBSD the iterator thread never exits but we do clean up.
5898          * The only way FreeBSD reaches here is if we have VRF's but we
5899          * still add the ifdef to make it compile on old versions.
5900          */
5901         SCTP_IPI_ITERATOR_WQ_LOCK();
5902         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5903                 if (it->vn != curvnet) {
5904                         continue;
5905                 }
5906                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5907                 if (it->function_atend != NULL) {
5908                         (*it->function_atend) (it->pointer, it->val);
5909                 }
5910                 SCTP_FREE(it, SCTP_M_ITER);
5911         }
5912         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5913         SCTP_ITERATOR_LOCK();
5914         if ((sctp_it_ctl.cur_it) &&
5915             (sctp_it_ctl.cur_it->vn == curvnet)) {
5916                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5917         }
5918         SCTP_ITERATOR_UNLOCK();
5919         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5920         SCTP_WQ_ADDR_LOCK();
5921         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5922                 LIST_REMOVE(wi, sctp_nxt_addr);
5923                 SCTP_DECR_LADDR_COUNT();
5924                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5925         }
5926         SCTP_WQ_ADDR_UNLOCK();
5927
5928         /*
5929          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5930          * destroyed first).
5931          */
5932         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5933         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5934                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5935                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5936                                 /* free the ifa */
5937                                 LIST_REMOVE(ifa, next_bucket);
5938                                 LIST_REMOVE(ifa, next_ifa);
5939                                 SCTP_FREE(ifa, SCTP_M_IFA);
5940                         }
5941                         /* free the ifn */
5942                         LIST_REMOVE(ifn, next_bucket);
5943                         LIST_REMOVE(ifn, next_ifn);
5944                         SCTP_FREE(ifn, SCTP_M_IFN);
5945                 }
5946                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5947                 /* free the vrf */
5948                 LIST_REMOVE(vrf, next_vrf);
5949                 SCTP_FREE(vrf, SCTP_M_VRF);
5950         }
5951         /* free the vrf hashes */
5952         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5953         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5954
5955         /*
5956          * free the TIMEWAIT list elements malloc'd in the function
5957          * sctp_add_vtag_to_timewait()...
5958          */
5959         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5960                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5961                 if (!LIST_EMPTY(chain)) {
5962                         prev_twait_block = NULL;
5963                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5964                                 if (prev_twait_block) {
5965                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5966                                 }
5967                                 prev_twait_block = twait_block;
5968                         }
5969                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5970                 }
5971         }
5972
5973         /* free the locks and mutexes */
5974 #ifdef SCTP_PACKET_LOGGING
5975         SCTP_IP_PKTLOG_DESTROY();
5976 #endif
5977         SCTP_IPI_ADDR_DESTROY();
5978         SCTP_STATLOG_DESTROY();
5979         SCTP_INP_INFO_LOCK_DESTROY();
5980
5981         SCTP_WQ_ADDR_DESTROY();
5982
5983         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5984         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5985         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5986         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5987         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5988         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5989         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5990         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5991         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5992         /* Get rid of other stuff to */
5993         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5994                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5995         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5996                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5997         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5998                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5999 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6000         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6001 #endif
6002 }
6003
6004
6005 int
6006 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6007     int offset, int limit,
6008     struct sockaddr *src, struct sockaddr *dst,
6009     struct sockaddr *altsa)
6010 {
6011         /*
6012          * grub through the INIT pulling addresses and loading them to the
6013          * nets structure in the asoc. The from address in the mbuf should
6014          * also be loaded (if it is not already). This routine can be called
6015          * with either INIT or INIT-ACK's as long as the m points to the IP
6016          * packet and the offset points to the beginning of the parameters.
6017          */
6018         struct sctp_inpcb *inp;
6019         struct sctp_nets *net, *nnet, *net_tmp;
6020         struct sctp_paramhdr *phdr, parm_buf;
6021         struct sctp_tcb *stcb_tmp;
6022         uint16_t ptype, plen;
6023         struct sockaddr *sa;
6024         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6025         struct sctp_auth_random *p_random = NULL;
6026         uint16_t random_len = 0;
6027         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6028         struct sctp_auth_hmac_algo *hmacs = NULL;
6029         uint16_t hmacs_len = 0;
6030         uint8_t saw_asconf = 0;
6031         uint8_t saw_asconf_ack = 0;
6032         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6033         struct sctp_auth_chunk_list *chunks = NULL;
6034         uint16_t num_chunks = 0;
6035         sctp_key_t *new_key;
6036         uint32_t keylen;
6037         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6038         uint8_t ecn_allowed;
6039
6040 #ifdef INET
6041         struct sockaddr_in sin;
6042
6043 #endif
6044 #ifdef INET6
6045         struct sockaddr_in6 sin6;
6046
6047 #endif
6048
6049         /* First get the destination address setup too. */
6050 #ifdef INET
6051         memset(&sin, 0, sizeof(sin));
6052         sin.sin_family = AF_INET;
6053         sin.sin_len = sizeof(sin);
6054         sin.sin_port = stcb->rport;
6055 #endif
6056 #ifdef INET6
6057         memset(&sin6, 0, sizeof(sin6));
6058         sin6.sin6_family = AF_INET6;
6059         sin6.sin6_len = sizeof(struct sockaddr_in6);
6060         sin6.sin6_port = stcb->rport;
6061 #endif
6062         if (altsa) {
6063                 sa = altsa;
6064         } else {
6065                 sa = src;
6066         }
6067         /* Turn off ECN until we get through all params */
6068         ecn_allowed = 0;
6069         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6070                 /* mark all addresses that we have currently on the list */
6071                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6072         }
6073         /* does the source address already exist? if so skip it */
6074         inp = stcb->sctp_ep;
6075         atomic_add_int(&stcb->asoc.refcnt, 1);
6076         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6077         atomic_add_int(&stcb->asoc.refcnt, -1);
6078
6079         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6080                 /* we must add the source address */
6081                 /* no scope set here since we have a tcb already. */
6082                 switch (sa->sa_family) {
6083 #ifdef INET
6084                 case AF_INET:
6085                         if (stcb->asoc.scope.ipv4_addr_legal) {
6086                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6087                                         return (-1);
6088                                 }
6089                         }
6090                         break;
6091 #endif
6092 #ifdef INET6
6093                 case AF_INET6:
6094                         if (stcb->asoc.scope.ipv6_addr_legal) {
6095                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6096                                         return (-2);
6097                                 }
6098                         }
6099                         break;
6100 #endif
6101                 default:
6102                         break;
6103                 }
6104         } else {
6105                 if (net_tmp != NULL && stcb_tmp == stcb) {
6106                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6107                 } else if (stcb_tmp != stcb) {
6108                         /* It belongs to another association? */
6109                         if (stcb_tmp)
6110                                 SCTP_TCB_UNLOCK(stcb_tmp);
6111                         return (-3);
6112                 }
6113         }
6114         if (stcb->asoc.state == 0) {
6115                 /* the assoc was freed? */
6116                 return (-4);
6117         }
6118         /*
6119          * peer must explicitly turn this on. This may have been initialized
6120          * to be "on" in order to allow local addr changes while INIT's are
6121          * in flight.
6122          */
6123         stcb->asoc.peer_supports_asconf = 0;
6124         /* now we must go through each of the params. */
6125         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6126         while (phdr) {
6127                 ptype = ntohs(phdr->param_type);
6128                 plen = ntohs(phdr->param_length);
6129                 /*
6130                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6131                  * (uint32_t)ptype, (int)plen);
6132                  */
6133                 if (offset + plen > limit) {
6134                         break;
6135                 }
6136                 if (plen == 0) {
6137                         break;
6138                 }
6139 #ifdef INET
6140                 if (ptype == SCTP_IPV4_ADDRESS) {
6141                         if (stcb->asoc.scope.ipv4_addr_legal) {
6142                                 struct sctp_ipv4addr_param *p4, p4_buf;
6143
6144                                 /* ok get the v4 address and check/add */
6145                                 phdr = sctp_get_next_param(m, offset,
6146                                     (struct sctp_paramhdr *)&p4_buf,
6147                                     sizeof(p4_buf));
6148                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6149                                     phdr == NULL) {
6150                                         return (-5);
6151                                 }
6152                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6153                                 sin.sin_addr.s_addr = p4->addr;
6154                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6155                                         /* Skip multi-cast addresses */
6156                                         goto next_param;
6157                                 }
6158                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6159                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6160                                         goto next_param;
6161                                 }
6162                                 sa = (struct sockaddr *)&sin;
6163                                 inp = stcb->sctp_ep;
6164                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6165                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6166                                     dst, stcb);
6167                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6168
6169                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6170                                     inp == NULL) {
6171                                         /* we must add the source address */
6172                                         /*
6173                                          * no scope set since we have a tcb
6174                                          * already
6175                                          */
6176
6177                                         /*
6178                                          * we must validate the state again
6179                                          * here
6180                                          */
6181                         add_it_now:
6182                                         if (stcb->asoc.state == 0) {
6183                                                 /* the assoc was freed? */
6184                                                 return (-7);
6185                                         }
6186                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6187                                                 return (-8);
6188                                         }
6189                                 } else if (stcb_tmp == stcb) {
6190                                         if (stcb->asoc.state == 0) {
6191                                                 /* the assoc was freed? */
6192                                                 return (-10);
6193                                         }
6194                                         if (net != NULL) {
6195                                                 /* clear flag */
6196                                                 net->dest_state &=
6197                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6198                                         }
6199                                 } else {
6200                                         /*
6201                                          * strange, address is in another
6202                                          * assoc? straighten out locks.
6203                                          */
6204                                         if (stcb_tmp) {
6205                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6206                                                         /*
6207                                                          * in setup state we
6208                                                          * abort this guy
6209                                                          */
6210                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6211                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6212                                                         goto add_it_now;
6213                                                 }
6214                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6215                                         }
6216                                         if (stcb->asoc.state == 0) {
6217                                                 /* the assoc was freed? */
6218                                                 return (-12);
6219                                         }
6220                                         return (-13);
6221                                 }
6222                         }
6223                 } else
6224 #endif
6225 #ifdef INET6
6226                 if (ptype == SCTP_IPV6_ADDRESS) {
6227                         if (stcb->asoc.scope.ipv6_addr_legal) {
6228                                 /* ok get the v6 address and check/add */
6229                                 struct sctp_ipv6addr_param *p6, p6_buf;
6230
6231                                 phdr = sctp_get_next_param(m, offset,
6232                                     (struct sctp_paramhdr *)&p6_buf,
6233                                     sizeof(p6_buf));
6234                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6235                                     phdr == NULL) {
6236                                         return (-14);
6237                                 }
6238                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6239                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6240                                     sizeof(p6->addr));
6241                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6242                                         /* Skip multi-cast addresses */
6243                                         goto next_param;
6244                                 }
6245                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6246                                         /*
6247                                          * Link local make no sense without
6248                                          * scope
6249                                          */
6250                                         goto next_param;
6251                                 }
6252                                 sa = (struct sockaddr *)&sin6;
6253                                 inp = stcb->sctp_ep;
6254                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6255                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6256                                     dst, stcb);
6257                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6258                                 if (stcb_tmp == NULL &&
6259                                     (inp == stcb->sctp_ep || inp == NULL)) {
6260                                         /*
6261                                          * we must validate the state again
6262                                          * here
6263                                          */
6264                         add_it_now6:
6265                                         if (stcb->asoc.state == 0) {
6266                                                 /* the assoc was freed? */
6267                                                 return (-16);
6268                                         }
6269                                         /*
6270                                          * we must add the address, no scope
6271                                          * set
6272                                          */
6273                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6274                                                 return (-17);
6275                                         }
6276                                 } else if (stcb_tmp == stcb) {
6277                                         /*
6278                                          * we must validate the state again
6279                                          * here
6280                                          */
6281                                         if (stcb->asoc.state == 0) {
6282                                                 /* the assoc was freed? */
6283                                                 return (-19);
6284                                         }
6285                                         if (net != NULL) {
6286                                                 /* clear flag */
6287                                                 net->dest_state &=
6288                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6289                                         }
6290                                 } else {
6291                                         /*
6292                                          * strange, address is in another
6293                                          * assoc? straighten out locks.
6294                                          */
6295                                         if (stcb_tmp)
6296                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6297                                                         /*
6298                                                          * in setup state we
6299                                                          * abort this guy
6300                                                          */
6301                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6302                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6303                                                         goto add_it_now6;
6304                                                 }
6305                                         SCTP_TCB_UNLOCK(stcb_tmp);
6306
6307                                         if (stcb->asoc.state == 0) {
6308                                                 /* the assoc was freed? */
6309                                                 return (-21);
6310                                         }
6311                                         return (-22);
6312                                 }
6313                         }
6314                 } else
6315 #endif
6316                 if (ptype == SCTP_ECN_CAPABLE) {
6317                         ecn_allowed = 1;
6318                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6319                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6320                                 struct sctp_adaptation_layer_indication ai,
6321                                                                 *aip;
6322
6323                                 phdr = sctp_get_next_param(m, offset,
6324                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6325                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6326                                 if (aip) {
6327                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6328                                         stcb->asoc.adaptation_needed = 1;
6329                                 }
6330                         }
6331                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6332                         struct sctp_asconf_addr_param lstore, *fee;
6333                         int lptype;
6334                         struct sockaddr *lsa = NULL;
6335
6336 #ifdef INET
6337                         struct sctp_asconf_addrv4_param *fii;
6338
6339 #endif
6340
6341                         stcb->asoc.peer_supports_asconf = 1;
6342                         if (plen > sizeof(lstore)) {
6343                                 return (-23);
6344                         }
6345                         phdr = sctp_get_next_param(m, offset,
6346                             (struct sctp_paramhdr *)&lstore,
6347                             min(plen, sizeof(lstore)));
6348                         if (phdr == NULL) {
6349                                 return (-24);
6350                         }
6351                         fee = (struct sctp_asconf_addr_param *)phdr;
6352                         lptype = ntohs(fee->addrp.ph.param_type);
6353                         switch (lptype) {
6354 #ifdef INET
6355                         case SCTP_IPV4_ADDRESS:
6356                                 if (plen !=
6357                                     sizeof(struct sctp_asconf_addrv4_param)) {
6358                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6359                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6360                                             plen);
6361                                 } else {
6362                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6363                                         sin.sin_addr.s_addr = fii->addrp.addr;
6364                                         lsa = (struct sockaddr *)&sin;
6365                                 }
6366                                 break;
6367 #endif
6368 #ifdef INET6
6369                         case SCTP_IPV6_ADDRESS:
6370                                 if (plen !=
6371                                     sizeof(struct sctp_asconf_addr_param)) {
6372                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6373                                             (int)sizeof(struct sctp_asconf_addr_param),
6374                                             plen);
6375                                 } else {
6376                                         memcpy(sin6.sin6_addr.s6_addr,
6377                                             fee->addrp.addr,
6378                                             sizeof(fee->addrp.addr));
6379                                         lsa = (struct sockaddr *)&sin6;
6380                                 }
6381                                 break;
6382 #endif
6383                         default:
6384                                 break;
6385                         }
6386                         if (lsa) {
6387                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6388                         }
6389                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6390                         stcb->asoc.peer_supports_nat = 1;
6391                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6392                         /* Peer supports pr-sctp */
6393                         stcb->asoc.peer_supports_prsctp = 1;
6394                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6395                         /* A supported extension chunk */
6396                         struct sctp_supported_chunk_types_param *pr_supported;
6397                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6398                         int num_ent, i;
6399
6400                         phdr = sctp_get_next_param(m, offset,
6401                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6402                         if (phdr == NULL) {
6403                                 return (-25);
6404                         }
6405                         stcb->asoc.peer_supports_asconf = 0;
6406                         stcb->asoc.peer_supports_prsctp = 0;
6407                         stcb->asoc.peer_supports_pktdrop = 0;
6408                         stcb->asoc.peer_supports_strreset = 0;
6409                         stcb->asoc.peer_supports_nr_sack = 0;
6410                         stcb->asoc.peer_supports_auth = 0;
6411                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6412                         num_ent = plen - sizeof(struct sctp_paramhdr);
6413                         for (i = 0; i < num_ent; i++) {
6414                                 switch (pr_supported->chunk_types[i]) {
6415                                 case SCTP_ASCONF:
6416                                 case SCTP_ASCONF_ACK:
6417                                         stcb->asoc.peer_supports_asconf = 1;
6418                                         break;
6419                                 case SCTP_FORWARD_CUM_TSN:
6420                                         stcb->asoc.peer_supports_prsctp = 1;
6421                                         break;
6422                                 case SCTP_PACKET_DROPPED:
6423                                         stcb->asoc.peer_supports_pktdrop = 1;
6424                                         break;
6425                                 case SCTP_NR_SELECTIVE_ACK:
6426                                         stcb->asoc.peer_supports_nr_sack = 1;
6427                                         break;
6428                                 case SCTP_STREAM_RESET:
6429                                         stcb->asoc.peer_supports_strreset = 1;
6430                                         break;
6431                                 case SCTP_AUTHENTICATION:
6432                                         stcb->asoc.peer_supports_auth = 1;
6433                                         break;
6434                                 default:
6435                                         /* one I have not learned yet */
6436                                         break;
6437
6438                                 }
6439                         }
6440                 } else if (ptype == SCTP_RANDOM) {
6441                         if (plen > sizeof(random_store))
6442                                 break;
6443                         if (got_random) {
6444                                 /* already processed a RANDOM */
6445                                 goto next_param;
6446                         }
6447                         phdr = sctp_get_next_param(m, offset,
6448                             (struct sctp_paramhdr *)random_store,
6449                             min(sizeof(random_store), plen));
6450                         if (phdr == NULL)
6451                                 return (-26);
6452                         p_random = (struct sctp_auth_random *)phdr;
6453                         random_len = plen - sizeof(*p_random);
6454                         /* enforce the random length */
6455                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6456                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6457                                 return (-27);
6458                         }
6459                         got_random = 1;
6460                 } else if (ptype == SCTP_HMAC_LIST) {
6461                         int num_hmacs;
6462                         int i;
6463
6464                         if (plen > sizeof(hmacs_store))
6465                                 break;
6466                         if (got_hmacs) {
6467                                 /* already processed a HMAC list */
6468                                 goto next_param;
6469                         }
6470                         phdr = sctp_get_next_param(m, offset,
6471                             (struct sctp_paramhdr *)hmacs_store,
6472                             min(plen, sizeof(hmacs_store)));
6473                         if (phdr == NULL)
6474                                 return (-28);
6475                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6476                         hmacs_len = plen - sizeof(*hmacs);
6477                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6478                         /* validate the hmac list */
6479                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6480                                 return (-29);
6481                         }
6482                         if (stcb->asoc.peer_hmacs != NULL)
6483                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6484                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6485                         if (stcb->asoc.peer_hmacs != NULL) {
6486                                 for (i = 0; i < num_hmacs; i++) {
6487                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6488                                             ntohs(hmacs->hmac_ids[i]));
6489                                 }
6490                         }
6491                         got_hmacs = 1;
6492                 } else if (ptype == SCTP_CHUNK_LIST) {
6493                         int i;
6494
6495                         if (plen > sizeof(chunks_store))
6496                                 break;
6497                         if (got_chklist) {
6498                                 /* already processed a Chunks list */
6499                                 goto next_param;
6500                         }
6501                         phdr = sctp_get_next_param(m, offset,
6502                             (struct sctp_paramhdr *)chunks_store,
6503                             min(plen, sizeof(chunks_store)));
6504                         if (phdr == NULL)
6505                                 return (-30);
6506                         chunks = (struct sctp_auth_chunk_list *)phdr;
6507                         num_chunks = plen - sizeof(*chunks);
6508                         if (stcb->asoc.peer_auth_chunks != NULL)
6509                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6510                         else
6511                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6512                         for (i = 0; i < num_chunks; i++) {
6513                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6514                                     stcb->asoc.peer_auth_chunks);
6515                                 /* record asconf/asconf-ack if listed */
6516                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6517                                         saw_asconf = 1;
6518                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6519                                         saw_asconf_ack = 1;
6520
6521                         }
6522                         got_chklist = 1;
6523                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6524                             (ptype == SCTP_STATE_COOKIE) ||
6525                             (ptype == SCTP_UNRECOG_PARAM) ||
6526                             (ptype == SCTP_COOKIE_PRESERVE) ||
6527                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6528                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6529                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6530                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6531                     (ptype == SCTP_SUCCESS_REPORT)) {
6532                          /* don't care */ ;
6533                 } else {
6534                         if ((ptype & 0x8000) == 0x0000) {
6535                                 /*
6536                                  * must stop processing the rest of the
6537                                  * param's. Any report bits were handled
6538                                  * with the call to
6539                                  * sctp_arethere_unrecognized_parameters()
6540                                  * when the INIT or INIT-ACK was first seen.
6541                                  */
6542                                 break;
6543                         }
6544                 }
6545
6546 next_param:
6547                 offset += SCTP_SIZE32(plen);
6548                 if (offset >= limit) {
6549                         break;
6550                 }
6551                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6552                     sizeof(parm_buf));
6553         }
6554         /* Now check to see if we need to purge any addresses */
6555         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6556                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6557                     SCTP_ADDR_NOT_IN_ASSOC) {
6558                         /* This address has been removed from the asoc */
6559                         /* remove and free it */
6560                         stcb->asoc.numnets--;
6561                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6562                         sctp_free_remote_addr(net);
6563                         if (net == stcb->asoc.primary_destination) {
6564                                 stcb->asoc.primary_destination = NULL;
6565                                 sctp_select_primary_destination(stcb);
6566                         }
6567                 }
6568         }
6569         if (ecn_allowed == 0) {
6570                 stcb->asoc.ecn_allowed = 0;
6571         }
6572         /* validate authentication required parameters */
6573         if (got_random && got_hmacs) {
6574                 stcb->asoc.peer_supports_auth = 1;
6575         } else {
6576                 stcb->asoc.peer_supports_auth = 0;
6577         }
6578         if (!stcb->asoc.peer_supports_auth && got_chklist) {
6579                 /* peer does not support auth but sent a chunks list? */
6580                 return (-31);
6581         }
6582         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6583             !stcb->asoc.peer_supports_auth) {
6584                 /* peer supports asconf but not auth? */
6585                 return (-32);
6586         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6587             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6588                 return (-33);
6589         }
6590         /* concatenate the full random key */
6591         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6592         if (chunks != NULL) {
6593                 keylen += sizeof(*chunks) + num_chunks;
6594         }
6595         new_key = sctp_alloc_key(keylen);
6596         if (new_key != NULL) {
6597                 /* copy in the RANDOM */
6598                 if (p_random != NULL) {
6599                         keylen = sizeof(*p_random) + random_len;
6600                         bcopy(p_random, new_key->key, keylen);
6601                 }
6602                 /* append in the AUTH chunks */
6603                 if (chunks != NULL) {
6604                         bcopy(chunks, new_key->key + keylen,
6605                             sizeof(*chunks) + num_chunks);
6606                         keylen += sizeof(*chunks) + num_chunks;
6607                 }
6608                 /* append in the HMACs */
6609                 if (hmacs != NULL) {
6610                         bcopy(hmacs, new_key->key + keylen,
6611                             sizeof(*hmacs) + hmacs_len);
6612                 }
6613         } else {
6614                 /* failed to get memory for the key */
6615                 return (-34);
6616         }
6617         if (stcb->asoc.authinfo.peer_random != NULL)
6618                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6619         stcb->asoc.authinfo.peer_random = new_key;
6620         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6621         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6622
6623         return (0);
6624 }
6625
6626 int
6627 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6628     struct sctp_nets *net)
6629 {
6630         /* make sure the requested primary address exists in the assoc */
6631         if (net == NULL && sa)
6632                 net = sctp_findnet(stcb, sa);
6633
6634         if (net == NULL) {
6635                 /* didn't find the requested primary address! */
6636                 return (-1);
6637         } else {
6638                 /* set the primary address */
6639                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6640                         /* Must be confirmed, so queue to set */
6641                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6642                         return (0);
6643                 }
6644                 stcb->asoc.primary_destination = net;
6645                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6646                         sctp_free_remote_addr(stcb->asoc.alternate);
6647                         stcb->asoc.alternate = NULL;
6648                 }
6649                 net = TAILQ_FIRST(&stcb->asoc.nets);
6650                 if (net != stcb->asoc.primary_destination) {
6651                         /*
6652                          * first one on the list is NOT the primary
6653                          * sctp_cmpaddr() is much more efficient if the
6654                          * primary is the first on the list, make it so.
6655                          */
6656                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6657                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6658                 }
6659                 return (0);
6660         }
6661 }
6662
6663 int
6664 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6665 {
6666         /*
6667          * This function serves two purposes. It will see if a TAG can be
6668          * re-used and return 1 for yes it is ok and 0 for don't use that
6669          * tag. A secondary function it will do is purge out old tags that
6670          * can be removed.
6671          */
6672         struct sctpvtaghead *chain;
6673         struct sctp_tagblock *twait_block;
6674         struct sctpasochead *head;
6675         struct sctp_tcb *stcb;
6676         int i;
6677
6678         SCTP_INP_INFO_RLOCK();
6679         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6680             SCTP_BASE_INFO(hashasocmark))];
6681         if (head == NULL) {
6682                 /* invalid vtag */
6683                 goto skip_vtag_check;
6684         }
6685         LIST_FOREACH(stcb, head, sctp_asocs) {
6686                 /*
6687                  * We choose not to lock anything here. TCB's can't be
6688                  * removed since we have the read lock, so they can't be
6689                  * freed on us, same thing for the INP. I may be wrong with
6690                  * this assumption, but we will go with it for now :-)
6691                  */
6692                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6693                         continue;
6694                 }
6695                 if (stcb->asoc.my_vtag == tag) {
6696                         /* candidate */
6697                         if (stcb->rport != rport) {
6698                                 continue;
6699                         }
6700                         if (stcb->sctp_ep->sctp_lport != lport) {
6701                                 continue;
6702                         }
6703                         /* Its a used tag set */
6704                         SCTP_INP_INFO_RUNLOCK();
6705                         return (0);
6706                 }
6707         }
6708 skip_vtag_check:
6709
6710         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6711         /* Now what about timed wait ? */
6712         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6713                 /*
6714                  * Block(s) are present, lets see if we have this tag in the
6715                  * list
6716                  */
6717                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6718                         if (twait_block->vtag_block[i].v_tag == 0) {
6719                                 /* not used */
6720                                 continue;
6721                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6722                             now->tv_sec) {
6723                                 /* Audit expires this guy */
6724                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6725                                 twait_block->vtag_block[i].v_tag = 0;
6726                                 twait_block->vtag_block[i].lport = 0;
6727                                 twait_block->vtag_block[i].rport = 0;
6728                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6729                                     (twait_block->vtag_block[i].lport == lport) &&
6730                             (twait_block->vtag_block[i].rport == rport)) {
6731                                 /* Bad tag, sorry :< */
6732                                 SCTP_INP_INFO_RUNLOCK();
6733                                 return (0);
6734                         }
6735                 }
6736         }
6737         SCTP_INP_INFO_RUNLOCK();
6738         return (1);
6739 }
6740
6741 static void
6742 sctp_drain_mbufs(struct sctp_tcb *stcb)
6743 {
6744         /*
6745          * We must hunt this association for MBUF's past the cumack (i.e.
6746          * out of order data that we can renege on).
6747          */
6748         struct sctp_association *asoc;
6749         struct sctp_tmit_chunk *chk, *nchk;
6750         uint32_t cumulative_tsn_p1;
6751         struct sctp_queued_to_read *ctl, *nctl;
6752         int cnt, strmat;
6753         uint32_t gap, i;
6754         int fnd = 0;
6755
6756         /* We look for anything larger than the cum-ack + 1 */
6757
6758         asoc = &stcb->asoc;
6759         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6760                 /* none we can reneg on. */
6761                 return;
6762         }
6763         SCTP_STAT_INCR(sctps_protocol_drains_done);
6764         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6765         cnt = 0;
6766         /* First look in the re-assembly queue */
6767         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6768                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6769                         /* Yep it is above cum-ack */
6770                         cnt++;
6771                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6772                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6773                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6774                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6775                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6776                         if (chk->data) {
6777                                 sctp_m_freem(chk->data);
6778                                 chk->data = NULL;
6779                         }
6780                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6781                 }
6782         }
6783         /* Ok that was fun, now we will drain all the inbound streams? */
6784         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6785                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6786                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6787                                 /* Yep it is above cum-ack */
6788                                 cnt++;
6789                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6790                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6791                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6792                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6793                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6794                                 if (ctl->data) {
6795                                         sctp_m_freem(ctl->data);
6796                                         ctl->data = NULL;
6797                                 }
6798                                 sctp_free_remote_addr(ctl->whoFrom);
6799                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6800                                 SCTP_DECR_READQ_COUNT();
6801                         }
6802                 }
6803         }
6804         if (cnt) {
6805                 /* We must back down to see what the new highest is */
6806                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6807                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6808                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6809                                 asoc->highest_tsn_inside_map = i;
6810                                 fnd = 1;
6811                                 break;
6812                         }
6813                 }
6814                 if (!fnd) {
6815                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6816                 }
6817                 /*
6818                  * Question, should we go through the delivery queue? The
6819                  * only reason things are on here is the app not reading OR
6820                  * a p-d-api up. An attacker COULD send enough in to
6821                  * initiate the PD-API and then send a bunch of stuff to
6822                  * other streams... these would wind up on the delivery
6823                  * queue.. and then we would not get to them. But in order
6824                  * to do this I then have to back-track and un-deliver
6825                  * sequence numbers in streams.. el-yucko. I think for now
6826                  * we will NOT look at the delivery queue and leave it to be
6827                  * something to consider later. An alternative would be to
6828                  * abort the P-D-API with a notification and then deliver
6829                  * the data.... Or another method might be to keep track of
6830                  * how many times the situation occurs and if we see a
6831                  * possible attack underway just abort the association.
6832                  */
6833 #ifdef SCTP_DEBUG
6834                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6835 #endif
6836                 /*
6837                  * Now do we need to find a new
6838                  * asoc->highest_tsn_inside_map?
6839                  */
6840                 asoc->last_revoke_count = cnt;
6841                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6842                 /* sa_ignore NO_NULL_CHK */
6843                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6844                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6845         }
6846         /*
6847          * Another issue, in un-setting the TSN's in the mapping array we
6848          * DID NOT adjust the highest_tsn marker.  This will cause one of
6849          * two things to occur. It may cause us to do extra work in checking
6850          * for our mapping array movement. More importantly it may cause us
6851          * to SACK every datagram. This may not be a bad thing though since
6852          * we will recover once we get our cum-ack above and all this stuff
6853          * we dumped recovered.
6854          */
6855 }
6856
6857 void
6858 sctp_drain()
6859 {
6860         /*
6861          * We must walk the PCB lists for ALL associations here. The system
6862          * is LOW on MBUF's and needs help. This is where reneging will
6863          * occur. We really hope this does NOT happen!
6864          */
6865         VNET_ITERATOR_DECL(vnet_iter);
6866         VNET_LIST_RLOCK_NOSLEEP();
6867         VNET_FOREACH(vnet_iter) {
6868                 CURVNET_SET(vnet_iter);
6869                 struct sctp_inpcb *inp;
6870                 struct sctp_tcb *stcb;
6871
6872                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6873                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6874 #ifdef VIMAGE
6875                         continue;
6876 #else
6877                         return;
6878 #endif
6879                 }
6880                 SCTP_INP_INFO_RLOCK();
6881                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6882                         /* For each endpoint */
6883                         SCTP_INP_RLOCK(inp);
6884                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6885                                 /* For each association */
6886                                 SCTP_TCB_LOCK(stcb);
6887                                 sctp_drain_mbufs(stcb);
6888                                 SCTP_TCB_UNLOCK(stcb);
6889                         }
6890                         SCTP_INP_RUNLOCK(inp);
6891                 }
6892                 SCTP_INP_INFO_RUNLOCK();
6893                 CURVNET_RESTORE();
6894         }
6895         VNET_LIST_RUNLOCK_NOSLEEP();
6896 }
6897
6898 /*
6899  * start a new iterator
6900  * iterates through all endpoints and associations based on the pcb_state
6901  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6902  * assocs and "ef" (optional) is executed when the iterator completes.
6903  * "inpf" (optional) is executed for each new endpoint as it is being
6904  * iterated through. inpe (optional) is called when the inp completes
6905  * its way through all the stcbs.
6906  */
6907 int
6908 sctp_initiate_iterator(inp_func inpf,
6909     asoc_func af,
6910     inp_func inpe,
6911     uint32_t pcb_state,
6912     uint32_t pcb_features,
6913     uint32_t asoc_state,
6914     void *argp,
6915     uint32_t argi,
6916     end_func ef,
6917     struct sctp_inpcb *s_inp,
6918     uint8_t chunk_output_off)
6919 {
6920         struct sctp_iterator *it = NULL;
6921
6922         if (af == NULL) {
6923                 return (-1);
6924         }
6925         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6926             SCTP_M_ITER);
6927         if (it == NULL) {
6928                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6929                 return (ENOMEM);
6930         }
6931         memset(it, 0, sizeof(*it));
6932         it->function_assoc = af;
6933         it->function_inp = inpf;
6934         if (inpf)
6935                 it->done_current_ep = 0;
6936         else
6937                 it->done_current_ep = 1;
6938         it->function_atend = ef;
6939         it->pointer = argp;
6940         it->val = argi;
6941         it->pcb_flags = pcb_state;
6942         it->pcb_features = pcb_features;
6943         it->asoc_state = asoc_state;
6944         it->function_inp_end = inpe;
6945         it->no_chunk_output = chunk_output_off;
6946         it->vn = curvnet;
6947         if (s_inp) {
6948                 /* Assume lock is held here */
6949                 it->inp = s_inp;
6950                 SCTP_INP_INCR_REF(it->inp);
6951                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
6952         } else {
6953                 SCTP_INP_INFO_RLOCK();
6954                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
6955                 if (it->inp) {
6956                         SCTP_INP_INCR_REF(it->inp);
6957                 }
6958                 SCTP_INP_INFO_RUNLOCK();
6959                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
6960
6961         }
6962         SCTP_IPI_ITERATOR_WQ_LOCK();
6963
6964         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
6965         if (sctp_it_ctl.iterator_running == 0) {
6966                 sctp_wakeup_iterator();
6967         }
6968         SCTP_IPI_ITERATOR_WQ_UNLOCK();
6969         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
6970         return (0);
6971 }