sys/netinet/sctp_pcb.c

   1 /*-
   2  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
   3  * Copyright (c) 2008-2011, by Randall Stewart. All rights reserved.
   4  * Copyright (c) 2008-2011, 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 /* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $     */
  34
  35 #include <sys/cdefs.h>
  36 __FBSDID("$FreeBSD$");
  37
  38 #include <netinet/sctp_os.h>
  39 #include <sys/proc.h>
  40 #include <netinet/sctp_var.h>
  41 #include <netinet/sctp_sysctl.h>
  42 #include <netinet/sctp_pcb.h>
  43 #include <netinet/sctputil.h>
  44 #include <netinet/sctp.h>
  45 #include <netinet/sctp_header.h>
  46 #include <netinet/sctp_asconf.h>
  47 #include <netinet/sctp_output.h>
  48 #include <netinet/sctp_timer.h>
  49 #include <netinet/sctp_bsd_addr.h>
  50 #include <netinet/sctp_dtrace_define.h>
  51 #include <netinet/udp.h>
  52 #ifdef INET6
  53 #include <netinet6/ip6_var.h>
  54 #endif
  55 #include <sys/sched.h>
  56 #include <sys/smp.h>
  57 #include <sys/unistd.h>
  58
  59
  60 VNET_DEFINE(struct sctp_base_info, system_base_info);
  61
  62 /* FIX: we don't handle multiple link local scopes */
  63 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  64 #ifdef INET6
  65 int
  66 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  67 {
  68         struct sockaddr_in6 tmp_a, tmp_b;
  69
  70         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  71         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  72                 return (0);
  73         }
  74         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  75         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  76                 return (0);
  77         }
  78         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  79 }
  80
  81 #endif
  82
  83 void
  84 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  85 {
  86         /*
  87          * We really don't need to lock this, but I will just because it
  88          * does not hurt.
  89          */
  90         SCTP_INP_INFO_RLOCK();
  91         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  92         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  93         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  94         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  95         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  96         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  97         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  98         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
  99
 100         SCTP_INP_INFO_RUNLOCK();
 101 }
 102
 103 /*
 104  * Addresses are added to VRF's (Virtual Router's). For BSD we
 105  * have only the default VRF 0. We maintain a hash list of
 106  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
 107  * these has a list of addresses. When we add a new address
 108  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 109  * not exist we create it and add it to the list of IFN's
 110  * within the VRF. Once we have the sctp_ifn, we add the
 111  * address to the list. So we look something like:
 112  *
 113  * hash-vrf-table
 114  *   vrf-> ifn-> ifn -> ifn
 115  *   vrf    |
 116  *    ...   +--ifa-> ifa -> ifa
 117  *   vrf
 118  *
 119  * We keep these separate lists since the SCTP subsystem will
 120  * point to these from its source address selection nets structure.
 121  * When an address is deleted it does not happen right away on
 122  * the SCTP side, it gets scheduled. What we do when a
 123  * delete happens is immediately remove the address from
 124  * the master list and decrement the refcount. As our
 125  * addip iterator works through and frees the src address
 126  * selection pointing to the sctp_ifa, eventually the refcount
 127  * will reach 0 and we will delete it. Note that it is assumed
 128  * that any locking on system level ifn/ifa is done at the
 129  * caller of these functions and these routines will only
 130  * lock the SCTP structures as they add or delete things.
 131  *
 132  * Other notes on VRF concepts.
 133  *  - An endpoint can be in multiple VRF's
 134  *  - An association lives within a VRF and only one VRF.
 135  *  - Any incoming packet we can deduce the VRF for by
 136  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 137  *  - Any downward send call or connect call must supply the
 138  *    VRF via ancillary data or via some sort of set default
 139  *    VRF socket option call (again for BSD no brainer since
 140  *    the VRF is always 0).
 141  *  - An endpoint may add multiple VRF's to it.
 142  *  - Listening sockets can accept associations in any
 143  *    of the VRF's they are in but the assoc will end up
 144  *    in only one VRF (gotten from the packet or connect/send).
 145  *
 146  */
 147
 148 struct sctp_vrf *
 149 sctp_allocate_vrf(int vrf_id)
 150 {
 151         struct sctp_vrf *vrf = NULL;
 152         struct sctp_vrflist *bucket;
 153
 154         /* First allocate the VRF structure */
 155         vrf = sctp_find_vrf(vrf_id);
 156         if (vrf) {
 157                 /* Already allocated */
 158                 return (vrf);
 159         }
 160         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 161             SCTP_M_VRF);
 162         if (vrf == NULL) {
 163                 /* No memory */
 164 #ifdef INVARIANTS
 165                 panic("No memory for VRF:%d", vrf_id);
 166 #endif
 167                 return (NULL);
 168         }
 169         /* setup the VRF */
 170         memset(vrf, 0, sizeof(struct sctp_vrf));
 171         vrf->vrf_id = vrf_id;
 172         LIST_INIT(&vrf->ifnlist);
 173         vrf->total_ifa_count = 0;
 174         vrf->refcount = 0;
 175         /* now also setup table ids */
 176         SCTP_INIT_VRF_TABLEID(vrf);
 177         /* Init the HASH of addresses */
 178         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 179             &vrf->vrf_addr_hashmark);
 180         if (vrf->vrf_addr_hash == NULL) {
 181                 /* No memory */
 182 #ifdef INVARIANTS
 183                 panic("No memory for VRF:%d", vrf_id);
 184 #endif
 185                 SCTP_FREE(vrf, SCTP_M_VRF);
 186                 return (NULL);
 187         }
 188         /* Add it to the hash table */
 189         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 190         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 191         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 192         return (vrf);
 193 }
 194
 195
 196 struct sctp_ifn *
 197 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 198 {
 199         struct sctp_ifn *sctp_ifnp;
 200         struct sctp_ifnlist *hash_ifn_head;
 201
 202         /*
 203          * We assume the lock is held for the addresses if that's wrong
 204          * problems could occur :-)
 205          */
 206         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 207         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 208                 if (sctp_ifnp->ifn_index == ifn_index) {
 209                         return (sctp_ifnp);
 210                 }
 211                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 212                         return (sctp_ifnp);
 213                 }
 214         }
 215         return (NULL);
 216 }
 217
 218
 219
 220 struct sctp_vrf *
 221 sctp_find_vrf(uint32_t vrf_id)
 222 {
 223         struct sctp_vrflist *bucket;
 224         struct sctp_vrf *liste;
 225
 226         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 227         LIST_FOREACH(liste, bucket, next_vrf) {
 228                 if (vrf_id == liste->vrf_id) {
 229                         return (liste);
 230                 }
 231         }
 232         return (NULL);
 233 }
 234
 235 void
 236 sctp_free_vrf(struct sctp_vrf *vrf)
 237 {
 238         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 239                 if (vrf->vrf_addr_hash) {
 240                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 241                         vrf->vrf_addr_hash = NULL;
 242                 }
 243                 /* We zero'd the count */
 244                 LIST_REMOVE(vrf, next_vrf);
 245                 SCTP_FREE(vrf, SCTP_M_VRF);
 246                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 247         }
 248 }
 249
 250 void
 251 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 252 {
 253         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 254                 /* We zero'd the count */
 255                 if (sctp_ifnp->vrf) {
 256                         sctp_free_vrf(sctp_ifnp->vrf);
 257                 }
 258                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 259                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 260         }
 261 }
 262
 263 void
 264 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 265 {
 266         struct sctp_ifn *sctp_ifnp;
 267
 268         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 269         if (sctp_ifnp != NULL) {
 270                 sctp_ifnp->ifn_mtu = mtu;
 271         }
 272 }
 273
 274
 275 void
 276 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 277 {
 278         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 279                 /* We zero'd the count */
 280                 if (sctp_ifap->ifn_p) {
 281                         sctp_free_ifn(sctp_ifap->ifn_p);
 282                 }
 283                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 284                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 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 void
 311 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 312     const char *if_name, uint32_t ifn_index)
 313 {
 314         struct sctp_vrf *vrf;
 315         struct sctp_ifa *sctp_ifap = NULL;
 316
 317         SCTP_IPI_ADDR_RLOCK();
 318         vrf = sctp_find_vrf(vrf_id);
 319         if (vrf == NULL) {
 320                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 321                 goto out;
 322
 323         }
 324         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 325         if (sctp_ifap == NULL) {
 326                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 327                 goto out;
 328         }
 329         if (sctp_ifap->ifn_p == NULL) {
 330                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 331                 goto out;
 332         }
 333         if (if_name) {
 334                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 335                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 336                             sctp_ifap->ifn_p->ifn_name, if_name);
 337                         goto out;
 338                 }
 339         } else {
 340                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 341                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 342                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 343                         goto out;
 344                 }
 345         }
 346
 347         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 348         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 349 out:
 350         SCTP_IPI_ADDR_RUNLOCK();
 351 }
 352
 353 void
 354 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 355     const char *if_name, uint32_t ifn_index)
 356 {
 357         struct sctp_vrf *vrf;
 358         struct sctp_ifa *sctp_ifap = NULL;
 359
 360         SCTP_IPI_ADDR_RLOCK();
 361         vrf = sctp_find_vrf(vrf_id);
 362         if (vrf == NULL) {
 363                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 364                 goto out;
 365
 366         }
 367         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 368         if (sctp_ifap == NULL) {
 369                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 370                 goto out;
 371         }
 372         if (sctp_ifap->ifn_p == NULL) {
 373                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 374                 goto out;
 375         }
 376         if (if_name) {
 377                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 378                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 379                             sctp_ifap->ifn_p->ifn_name, if_name);
 380                         goto out;
 381                 }
 382         } else {
 383                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 384                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 385                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 386                         goto out;
 387                 }
 388         }
 389
 390         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 391         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 392 out:
 393         SCTP_IPI_ADDR_RUNLOCK();
 394 }
 395
 396 /*-
 397  * Add an ifa to an ifn.
 398  * Register the interface as necessary.
 399  * NOTE: ADDR write lock MUST be held.
 400  */
 401 static void
 402 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 403 {
 404         int ifa_af;
 405
 406         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 407         sctp_ifap->ifn_p = sctp_ifnp;
 408         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 409         /* update address counts */
 410         sctp_ifnp->ifa_count++;
 411         ifa_af = sctp_ifap->address.sa.sa_family;
 412         switch (ifa_af) {
 413 #ifdef INET
 414         case AF_INET:
 415                 sctp_ifnp->num_v4++;
 416                 break;
 417 #endif
 418 #ifdef INET6
 419         case AF_INET6:
 420                 sctp_ifnp->num_v6++;
 421                 break;
 422 #endif
 423         default:
 424                 break;
 425         }
 426         if (sctp_ifnp->ifa_count == 1) {
 427                 /* register the new interface */
 428                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 429                 sctp_ifnp->registered_af = ifa_af;
 430         }
 431 }
 432
 433 /*-
 434  * Remove an ifa from its ifn.
 435  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 436  * the interface based on the remaining address families left.
 437  * NOTE: ADDR write lock MUST be held.
 438  */
 439 static void
 440 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 441 {
 442         LIST_REMOVE(sctp_ifap, next_ifa);
 443         if (sctp_ifap->ifn_p) {
 444                 /* update address counts */
 445                 sctp_ifap->ifn_p->ifa_count--;
 446                 switch (sctp_ifap->address.sa.sa_family) {
 447 #ifdef INET
 448                 case AF_INET:
 449                         sctp_ifap->ifn_p->num_v4--;
 450                         break;
 451 #endif
 452 #ifdef INET6
 453                 case AF_INET6:
 454                         sctp_ifap->ifn_p->num_v6--;
 455                         break;
 456 #endif
 457                 default:
 458                         break;
 459                 }
 460
 461                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 462                         /* remove the ifn, possibly freeing it */
 463                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 464                 } else {
 465                         /* re-register address family type, if needed */
 466                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 467                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 468                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 469                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 470                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 471                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 472                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 473                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 474                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 475                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 476                         }
 477                         /* free the ifn refcount */
 478                         sctp_free_ifn(sctp_ifap->ifn_p);
 479                 }
 480                 sctp_ifap->ifn_p = NULL;
 481         }
 482 }
 483
 484 struct sctp_ifa *
 485 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 486     uint32_t ifn_type, const char *if_name, void *ifa,
 487     struct sockaddr *addr, uint32_t ifa_flags,
 488     int dynamic_add)
 489 {
 490         struct sctp_vrf *vrf;
 491         struct sctp_ifn *sctp_ifnp = NULL;
 492         struct sctp_ifa *sctp_ifap = NULL;
 493         struct sctp_ifalist *hash_addr_head;
 494         struct sctp_ifnlist *hash_ifn_head;
 495         uint32_t hash_of_addr;
 496         int new_ifn_af = 0;
 497
 498 #ifdef SCTP_DEBUG
 499         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 500         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 501 #endif
 502         SCTP_IPI_ADDR_WLOCK();
 503         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 504         if (sctp_ifnp) {
 505                 vrf = sctp_ifnp->vrf;
 506         } else {
 507                 vrf = sctp_find_vrf(vrf_id);
 508                 if (vrf == NULL) {
 509                         vrf = sctp_allocate_vrf(vrf_id);
 510                         if (vrf == NULL) {
 511                                 SCTP_IPI_ADDR_WUNLOCK();
 512                                 return (NULL);
 513                         }
 514                 }
 515         }
 516         if (sctp_ifnp == NULL) {
 517                 /*
 518                  * build one and add it, can't hold lock until after malloc
 519                  * done though.
 520                  */
 521                 SCTP_IPI_ADDR_WUNLOCK();
 522                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 523                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 524                 if (sctp_ifnp == NULL) {
 525 #ifdef INVARIANTS
 526                         panic("No memory for IFN");
 527 #endif
 528                         return (NULL);
 529                 }
 530                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 531                 sctp_ifnp->ifn_index = ifn_index;
 532                 sctp_ifnp->ifn_p = ifn;
 533                 sctp_ifnp->ifn_type = ifn_type;
 534                 sctp_ifnp->refcount = 0;
 535                 sctp_ifnp->vrf = vrf;
 536                 atomic_add_int(&vrf->refcount, 1);
 537                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 538                 if (if_name != NULL) {
 539                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
 540                 } else {
 541                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
 542                 }
 543                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 544                 LIST_INIT(&sctp_ifnp->ifalist);
 545                 SCTP_IPI_ADDR_WLOCK();
 546                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 547                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 548                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 549                 new_ifn_af = 1;
 550         }
 551         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 552         if (sctp_ifap) {
 553                 /* Hmm, it already exists? */
 554                 if ((sctp_ifap->ifn_p) &&
 555                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 556                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 557                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 558                             sctp_ifap);
 559                         if (new_ifn_af) {
 560                                 /* Remove the created one that we don't want */
 561                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 562                         }
 563                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 564                                 /* easy to solve, just switch back to active */
 565                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 566                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 567                                 sctp_ifap->ifn_p = sctp_ifnp;
 568                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 569                         }
 570         exit_stage_left:
 571                         SCTP_IPI_ADDR_WUNLOCK();
 572                         return (sctp_ifap);
 573                 } else {
 574                         if (sctp_ifap->ifn_p) {
 575                                 /*
 576                                  * The last IFN gets the address, remove the
 577                                  * old one
 578                                  */
 579                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 580                                     sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 581                                     sctp_ifap->ifn_p->ifn_index, if_name,
 582                                     ifn_index);
 583                                 /* remove the address from the old ifn */
 584                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 585                                 /* move the address over to the new ifn */
 586                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 587                                 goto exit_stage_left;
 588                         } else {
 589                                 /* repair ifnp which was NULL ? */
 590                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 591                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 592                                     sctp_ifnp, sctp_ifap);
 593                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 594                         }
 595                         goto exit_stage_left;
 596                 }
 597         }
 598         SCTP_IPI_ADDR_WUNLOCK();
 599         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 600         if (sctp_ifap == NULL) {
 601 #ifdef INVARIANTS
 602                 panic("No memory for IFA");
 603 #endif
 604                 return (NULL);
 605         }
 606         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 607         sctp_ifap->ifn_p = sctp_ifnp;
 608         atomic_add_int(&sctp_ifnp->refcount, 1);
 609         sctp_ifap->vrf_id = vrf_id;
 610         sctp_ifap->ifa = ifa;
 611         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 612         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 613         sctp_ifap->flags = ifa_flags;
 614         /* Set scope */
 615         switch (sctp_ifap->address.sa.sa_family) {
 616 #ifdef INET
 617         case AF_INET:
 618                 {
 619                         struct sockaddr_in *sin;
 620
 621                         sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
 622                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 623                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 624                                 sctp_ifap->src_is_loop = 1;
 625                         }
 626                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 627                                 sctp_ifap->src_is_priv = 1;
 628                         }
 629                         sctp_ifnp->num_v4++;
 630                         if (new_ifn_af)
 631                                 new_ifn_af = AF_INET;
 632                         break;
 633                 }
 634 #endif
 635 #ifdef INET6
 636         case AF_INET6:
 637                 {
 638                         /* ok to use deprecated addresses? */
 639                         struct sockaddr_in6 *sin6;
 640
 641                         sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
 642                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 643                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 644                                 sctp_ifap->src_is_loop = 1;
 645                         }
 646                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 647                                 sctp_ifap->src_is_priv = 1;
 648                         }
 649                         sctp_ifnp->num_v6++;
 650                         if (new_ifn_af)
 651                                 new_ifn_af = AF_INET6;
 652                         break;
 653                 }
 654 #endif
 655         default:
 656                 new_ifn_af = 0;
 657                 break;
 658         }
 659         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 660
 661         if ((sctp_ifap->src_is_priv == 0) &&
 662             (sctp_ifap->src_is_loop == 0)) {
 663                 sctp_ifap->src_is_glob = 1;
 664         }
 665         SCTP_IPI_ADDR_WLOCK();
 666         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 667         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 668         sctp_ifap->refcount = 1;
 669         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 670         sctp_ifnp->ifa_count++;
 671         vrf->total_ifa_count++;
 672         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 673         if (new_ifn_af) {
 674                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 675                 sctp_ifnp->registered_af = new_ifn_af;
 676         }
 677         SCTP_IPI_ADDR_WUNLOCK();
 678         if (dynamic_add) {
 679                 /*
 680                  * Bump up the refcount so that when the timer completes it
 681                  * will drop back down.
 682                  */
 683                 struct sctp_laddr *wi;
 684
 685                 atomic_add_int(&sctp_ifap->refcount, 1);
 686                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 687                 if (wi == NULL) {
 688                         /*
 689                          * Gak, what can we do? We have lost an address
 690                          * change can you say HOSED?
 691                          */
 692                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 693                         /* Opps, must decrement the count */
 694                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 695                             if_name);
 696                         return (NULL);
 697                 }
 698                 SCTP_INCR_LADDR_COUNT();
 699                 bzero(wi, sizeof(*wi));
 700                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 701                 wi->ifa = sctp_ifap;
 702                 wi->action = SCTP_ADD_IP_ADDRESS;
 703
 704                 SCTP_WQ_ADDR_LOCK();
 705                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 706                 SCTP_WQ_ADDR_UNLOCK();
 707
 708                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 709                     (struct sctp_inpcb *)NULL,
 710                     (struct sctp_tcb *)NULL,
 711                     (struct sctp_nets *)NULL);
 712         } else {
 713                 /* it's ready for use */
 714                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 715         }
 716         return (sctp_ifap);
 717 }
 718
 719 void
 720 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 721     uint32_t ifn_index, const char *if_name)
 722 {
 723         struct sctp_vrf *vrf;
 724         struct sctp_ifa *sctp_ifap = NULL;
 725
 726         SCTP_IPI_ADDR_WLOCK();
 727         vrf = sctp_find_vrf(vrf_id);
 728         if (vrf == NULL) {
 729                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 730                 goto out_now;
 731         }
 732 #ifdef SCTP_DEBUG
 733         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 734         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 735 #endif
 736         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 737         if (sctp_ifap) {
 738                 /* Validate the delete */
 739                 if (sctp_ifap->ifn_p) {
 740                         int valid = 0;
 741
 742                         /*-
 743                          * The name has priority over the ifn_index
 744                          * if its given. We do this especially for
 745                          * panda who might recycle indexes fast.
 746                          */
 747                         if (if_name) {
 748                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 749                                         /* They match its a correct delete */
 750                                         valid = 1;
 751                                 }
 752                         }
 753                         if (!valid) {
 754                                 /* last ditch check ifn_index */
 755                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 756                                         valid = 1;
 757                                 }
 758                         }
 759                         if (!valid) {
 760                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 761                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 762                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 763                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 764                                 SCTP_IPI_ADDR_WUNLOCK();
 765                                 return;
 766                         }
 767                 }
 768                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap);
 769                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 770                 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
 771                 vrf->total_ifa_count--;
 772                 LIST_REMOVE(sctp_ifap, next_bucket);
 773                 sctp_remove_ifa_from_ifn(sctp_ifap);
 774         }
 775 #ifdef SCTP_DEBUG
 776         else {
 777                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 778                     ifn_index);
 779                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 780         }
 781 #endif
 782
 783 out_now:
 784         SCTP_IPI_ADDR_WUNLOCK();
 785         if (sctp_ifap) {
 786                 struct sctp_laddr *wi;
 787
 788                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 789                 if (wi == NULL) {
 790                         /*
 791                          * Gak, what can we do? We have lost an address
 792                          * change can you say HOSED?
 793                          */
 794                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 795
 796                         /* Oops, must decrement the count */
 797                         sctp_free_ifa(sctp_ifap);
 798                         return;
 799                 }
 800                 SCTP_INCR_LADDR_COUNT();
 801                 bzero(wi, sizeof(*wi));
 802                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 803                 wi->ifa = sctp_ifap;
 804                 wi->action = SCTP_DEL_IP_ADDRESS;
 805                 SCTP_WQ_ADDR_LOCK();
 806                 /*
 807                  * Should this really be a tailq? As it is we will process
 808                  * the newest first :-0
 809                  */
 810                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 811                 SCTP_WQ_ADDR_UNLOCK();
 812
 813                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 814                     (struct sctp_inpcb *)NULL,
 815                     (struct sctp_tcb *)NULL,
 816                     (struct sctp_nets *)NULL);
 817         }
 818         return;
 819 }
 820
 821
 822 static struct sctp_tcb *
 823 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 824     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
 825 {
 826         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
 827         /*
 828          * If we support the TCP model, then we must now dig through to see
 829          * if we can find our endpoint in the list of tcp ep's.
 830          */
 831         uint16_t lport, rport;
 832         struct sctppcbhead *ephead;
 833         struct sctp_inpcb *inp;
 834         struct sctp_laddr *laddr;
 835         struct sctp_tcb *stcb;
 836         struct sctp_nets *net;
 837
 838         if ((to == NULL) || (from == NULL)) {
 839                 return (NULL);
 840         }
 841         switch (to->sa_family) {
 842 #ifdef INET
 843         case AF_INET:
 844                 if (from->sa_family == AF_INET) {
 845                         lport = ((struct sockaddr_in *)to)->sin_port;
 846                         rport = ((struct sockaddr_in *)from)->sin_port;
 847                 } else {
 848                         return (NULL);
 849                 }
 850                 break;
 851 #endif
 852 #ifdef INET6
 853         case AF_INET6:
 854                 if (from->sa_family == AF_INET6) {
 855                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
 856                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
 857                 } else {
 858                         return (NULL);
 859                 }
 860                 break;
 861 #endif
 862         default:
 863                 return (NULL);
 864         }
 865         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
 866         /*
 867          * Ok now for each of the guys in this bucket we must look and see:
 868          * - Does the remote port match. - Does there single association's
 869          * addresses match this address (to). If so we update p_ep to point
 870          * to this ep and return the tcb from it.
 871          */
 872         LIST_FOREACH(inp, ephead, sctp_hash) {
 873                 SCTP_INP_RLOCK(inp);
 874                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 875                         SCTP_INP_RUNLOCK(inp);
 876                         continue;
 877                 }
 878                 if (lport != inp->sctp_lport) {
 879                         SCTP_INP_RUNLOCK(inp);
 880                         continue;
 881                 }
 882                 if (inp->def_vrf_id != vrf_id) {
 883                         SCTP_INP_RUNLOCK(inp);
 884                         continue;
 885                 }
 886                 /* check to see if the ep has one of the addresses */
 887                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 888                         /* We are NOT bound all, so look further */
 889                         int match = 0;
 890
 891                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 892
 893                                 if (laddr->ifa == NULL) {
 894                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
 895                                         continue;
 896                                 }
 897                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 898                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 899                                         continue;
 900                                 }
 901                                 if (laddr->ifa->address.sa.sa_family ==
 902                                     to->sa_family) {
 903                                         /* see if it matches */
 904
 905 #ifdef INET
 906                                         if (from->sa_family == AF_INET) {
 907                                                 struct sockaddr_in *intf_addr,
 908                                                            *sin;
 909
 910                                                 intf_addr = &laddr->ifa->address.sin;
 911                                                 sin = (struct sockaddr_in *)to;
 912                                                 if (sin->sin_addr.s_addr ==
 913                                                     intf_addr->sin_addr.s_addr) {
 914                                                         match = 1;
 915                                                         break;
 916                                                 }
 917                                         }
 918 #endif
 919 #ifdef INET6
 920                                         if (from->sa_family == AF_INET6) {
 921                                                 struct sockaddr_in6 *intf_addr6;
 922                                                 struct sockaddr_in6 *sin6;
 923
 924                                                 sin6 = (struct sockaddr_in6 *)
 925                                                     to;
 926                                                 intf_addr6 = &laddr->ifa->address.sin6;
 927
 928                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
 929                                                     intf_addr6)) {
 930                                                         match = 1;
 931                                                         break;
 932                                                 }
 933                                         }
 934 #endif
 935                                 }
 936                         }
 937                         if (match == 0) {
 938                                 /* This endpoint does not have this address */
 939                                 SCTP_INP_RUNLOCK(inp);
 940                                 continue;
 941                         }
 942                 }
 943                 /*
 944                  * Ok if we hit here the ep has the address, does it hold
 945                  * the tcb?
 946                  */
 947
 948                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 949                 if (stcb == NULL) {
 950                         SCTP_INP_RUNLOCK(inp);
 951                         continue;
 952                 }
 953                 SCTP_TCB_LOCK(stcb);
 954                 if (stcb->rport != rport) {
 955                         /* remote port does not match. */
 956                         SCTP_TCB_UNLOCK(stcb);
 957                         SCTP_INP_RUNLOCK(inp);
 958                         continue;
 959                 }
 960                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 961                         SCTP_TCB_UNLOCK(stcb);
 962                         SCTP_INP_RUNLOCK(inp);
 963                         continue;
 964                 }
 965                 /* Does this TCB have a matching address? */
 966                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 967
 968                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
 969                                 /* not the same family, can't be a match */
 970                                 continue;
 971                         }
 972                         switch (from->sa_family) {
 973 #ifdef INET
 974                         case AF_INET:
 975                                 {
 976                                         struct sockaddr_in *sin, *rsin;
 977
 978                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
 979                                         rsin = (struct sockaddr_in *)from;
 980                                         if (sin->sin_addr.s_addr ==
 981                                             rsin->sin_addr.s_addr) {
 982                                                 /* found it */
 983                                                 if (netp != NULL) {
 984                                                         *netp = net;
 985                                                 }
 986                                                 /*
 987                                                  * Update the endpoint
 988                                                  * pointer
 989                                                  */
 990                                                 *inp_p = inp;
 991                                                 SCTP_INP_RUNLOCK(inp);
 992                                                 return (stcb);
 993                                         }
 994                                         break;
 995                                 }
 996 #endif
 997 #ifdef INET6
 998                         case AF_INET6:
 999                                 {
1000                                         struct sockaddr_in6 *sin6, *rsin6;
1001
1002                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1003                                         rsin6 = (struct sockaddr_in6 *)from;
1004                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1005                                             rsin6)) {
1006                                                 /* found it */
1007                                                 if (netp != NULL) {
1008                                                         *netp = net;
1009                                                 }
1010                                                 /*
1011                                                  * Update the endpoint
1012                                                  * pointer
1013                                                  */
1014                                                 *inp_p = inp;
1015                                                 SCTP_INP_RUNLOCK(inp);
1016                                                 return (stcb);
1017                                         }
1018                                         break;
1019                                 }
1020 #endif
1021                         default:
1022                                 /* TSNH */
1023                                 break;
1024                         }
1025                 }
1026                 SCTP_TCB_UNLOCK(stcb);
1027                 SCTP_INP_RUNLOCK(inp);
1028         }
1029         return (NULL);
1030 }
1031
1032 static int
1033 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
1034 {
1035         int loopback_scope, ipv4_local_scope, local_scope, site_scope;
1036         int ipv4_addr_legal, ipv6_addr_legal;
1037         struct sctp_vrf *vrf;
1038         struct sctp_ifn *sctp_ifn;
1039         struct sctp_ifa *sctp_ifa;
1040
1041         loopback_scope = stcb->asoc.loopback_scope;
1042         ipv4_local_scope = stcb->asoc.ipv4_local_scope;
1043         local_scope = stcb->asoc.local_scope;
1044         site_scope = stcb->asoc.site_scope;
1045         ipv4_addr_legal = ipv6_addr_legal = 0;
1046         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1047                 ipv6_addr_legal = 1;
1048                 if (SCTP_IPV6_V6ONLY(stcb->sctp_ep) == 0) {
1049                         ipv4_addr_legal = 1;
1050                 }
1051         } else {
1052                 ipv4_addr_legal = 1;
1053         }
1054
1055         SCTP_IPI_ADDR_RLOCK();
1056         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
1057         if (vrf == NULL) {
1058                 /* no vrf, no addresses */
1059                 SCTP_IPI_ADDR_RUNLOCK();
1060                 return (0);
1061         }
1062         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
1063                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
1064                         if ((loopback_scope == 0) &&
1065                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
1066                                 continue;
1067                         }
1068                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
1069                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
1070                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
1071                                         /*
1072                                          * We allow pending addresses, where
1073                                          * we have sent an asconf-add to be
1074                                          * considered valid.
1075                                          */
1076                                         continue;
1077                                 }
1078                                 switch (sctp_ifa->address.sa.sa_family) {
1079 #ifdef INET
1080                                 case AF_INET:
1081                                         if (ipv4_addr_legal) {
1082                                                 struct sockaddr_in *sin,
1083                                                            *rsin;
1084
1085                                                 sin = &sctp_ifa->address.sin;
1086                                                 rsin = (struct sockaddr_in *)to;
1087                                                 if ((ipv4_local_scope == 0) &&
1088                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
1089                                                         continue;
1090                                                 }
1091                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1092                                                         SCTP_IPI_ADDR_RUNLOCK();
1093                                                         return (1);
1094                                                 }
1095                                         }
1096                                         break;
1097 #endif
1098 #ifdef INET6
1099                                 case AF_INET6:
1100                                         if (ipv6_addr_legal) {
1101                                                 struct sockaddr_in6 *sin6,
1102                                                             *rsin6;
1103
1104                                                 sin6 = &sctp_ifa->address.sin6;
1105                                                 rsin6 = (struct sockaddr_in6 *)to;
1106                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1107                                                         if (local_scope == 0)
1108                                                                 continue;
1109                                                         if (sin6->sin6_scope_id == 0) {
1110                                                                 if (sa6_recoverscope(sin6) != 0)
1111                                                                         continue;
1112                                                         }
1113                                                 }
1114                                                 if ((site_scope == 0) &&
1115                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1116                                                         continue;
1117                                                 }
1118                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1119                                                         SCTP_IPI_ADDR_RUNLOCK();
1120                                                         return (1);
1121                                                 }
1122                                         }
1123                                         break;
1124 #endif
1125                                 default:
1126                                         /* TSNH */
1127                                         break;
1128                                 }
1129                         }
1130                 }
1131         } else {
1132                 struct sctp_laddr *laddr;
1133
1134                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
1135                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
1136                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
1137                                 /*
1138                                  * We allow pending addresses, where we have
1139                                  * sent an asconf-add to be considered
1140                                  * valid.
1141                                  */
1142                                 continue;
1143                         }
1144                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
1145                                 continue;
1146                         }
1147                         switch (to->sa_family) {
1148 #ifdef INET
1149                         case AF_INET:
1150                                 {
1151                                         struct sockaddr_in *sin, *rsin;
1152
1153                                         sin = (struct sockaddr_in *)&laddr->ifa->address.sin;
1154                                         rsin = (struct sockaddr_in *)to;
1155                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1156                                                 SCTP_IPI_ADDR_RUNLOCK();
1157                                                 return (1);
1158                                         }
1159                                         break;
1160                                 }
1161 #endif
1162 #ifdef INET6
1163                         case AF_INET6:
1164                                 {
1165                                         struct sockaddr_in6 *sin6, *rsin6;
1166
1167                                         sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6;
1168                                         rsin6 = (struct sockaddr_in6 *)to;
1169                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1170                                                 SCTP_IPI_ADDR_RUNLOCK();
1171                                                 return (1);
1172                                         }
1173                                         break;
1174                                 }
1175
1176 #endif
1177                         default:
1178                                 /* TSNH */
1179                                 break;
1180                         }
1181
1182                 }
1183         }
1184         SCTP_IPI_ADDR_RUNLOCK();
1185         return (0);
1186 }
1187
1188 /*
1189  * rules for use
1190  *
1191  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1192  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1193  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1194  * NULL.
1195  */
1196
1197 struct sctp_tcb *
1198 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1199     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1200 {
1201         struct sctpasochead *head;
1202         struct sctp_inpcb *inp;
1203         struct sctp_tcb *stcb = NULL;
1204         struct sctp_nets *net;
1205         uint16_t rport;
1206
1207         inp = *inp_p;
1208         if (remote->sa_family == AF_INET) {
1209                 rport = (((struct sockaddr_in *)remote)->sin_port);
1210         } else if (remote->sa_family == AF_INET6) {
1211                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1212         } else {
1213                 return (NULL);
1214         }
1215         if (locked_tcb) {
1216                 /*
1217                  * UN-lock so we can do proper locking here this occurs when
1218                  * called from load_addresses_from_init.
1219                  */
1220                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1221                 SCTP_TCB_UNLOCK(locked_tcb);
1222         }
1223         SCTP_INP_INFO_RLOCK();
1224         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
1225                 /*-
1226                  * Now either this guy is our listener or it's the
1227                  * connector. If it is the one that issued the connect, then
1228                  * it's only chance is to be the first TCB in the list. If
1229                  * it is the acceptor, then do the special_lookup to hash
1230                  * and find the real inp.
1231                  */
1232                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1233                         /* to is peer addr, from is my addr */
1234                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1235                             netp, inp->def_vrf_id);
1236                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1237                                 /* we have a locked tcb, lower refcount */
1238                                 SCTP_INP_DECR_REF(inp);
1239                         }
1240                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1241                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1242                                 SCTP_TCB_LOCK(locked_tcb);
1243                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1244                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1245                         }
1246                         SCTP_INP_INFO_RUNLOCK();
1247                         return (stcb);
1248                 } else {
1249                         SCTP_INP_WLOCK(inp);
1250                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1251                                 goto null_return;
1252                         }
1253                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1254                         if (stcb == NULL) {
1255                                 goto null_return;
1256                         }
1257                         SCTP_TCB_LOCK(stcb);
1258
1259                         if (stcb->rport != rport) {
1260                                 /* remote port does not match. */
1261                                 SCTP_TCB_UNLOCK(stcb);
1262                                 goto null_return;
1263                         }
1264                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1265                                 SCTP_TCB_UNLOCK(stcb);
1266                                 goto null_return;
1267                         }
1268                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1269                                 SCTP_TCB_UNLOCK(stcb);
1270                                 goto null_return;
1271                         }
1272                         /* now look at the list of remote addresses */
1273                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1274 #ifdef INVARIANTS
1275                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1276                                         panic("Corrupt net list");
1277                                 }
1278 #endif
1279                                 if (net->ro._l_addr.sa.sa_family !=
1280                                     remote->sa_family) {
1281                                         /* not the same family */
1282                                         continue;
1283                                 }
1284                                 switch (remote->sa_family) {
1285 #ifdef INET
1286                                 case AF_INET:
1287                                         {
1288                                                 struct sockaddr_in *sin,
1289                                                            *rsin;
1290
1291                                                 sin = (struct sockaddr_in *)
1292                                                     &net->ro._l_addr;
1293                                                 rsin = (struct sockaddr_in *)remote;
1294                                                 if (sin->sin_addr.s_addr ==
1295                                                     rsin->sin_addr.s_addr) {
1296                                                         /* found it */
1297                                                         if (netp != NULL) {
1298                                                                 *netp = net;
1299                                                         }
1300                                                         if (locked_tcb == NULL) {
1301                                                                 SCTP_INP_DECR_REF(inp);
1302                                                         } else if (locked_tcb != stcb) {
1303                                                                 SCTP_TCB_LOCK(locked_tcb);
1304                                                         }
1305                                                         if (locked_tcb) {
1306                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1307                                                         }
1308                                                         SCTP_INP_WUNLOCK(inp);
1309                                                         SCTP_INP_INFO_RUNLOCK();
1310                                                         return (stcb);
1311                                                 }
1312                                                 break;
1313                                         }
1314 #endif
1315 #ifdef INET6
1316                                 case AF_INET6:
1317                                         {
1318                                                 struct sockaddr_in6 *sin6,
1319                                                             *rsin6;
1320
1321                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1322                                                 rsin6 = (struct sockaddr_in6 *)remote;
1323                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1324                                                     rsin6)) {
1325                                                         /* found it */
1326                                                         if (netp != NULL) {
1327                                                                 *netp = net;
1328                                                         }
1329                                                         if (locked_tcb == NULL) {
1330                                                                 SCTP_INP_DECR_REF(inp);
1331                                                         } else if (locked_tcb != stcb) {
1332                                                                 SCTP_TCB_LOCK(locked_tcb);
1333                                                         }
1334                                                         if (locked_tcb) {
1335                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1336                                                         }
1337                                                         SCTP_INP_WUNLOCK(inp);
1338                                                         SCTP_INP_INFO_RUNLOCK();
1339                                                         return (stcb);
1340                                                 }
1341                                                 break;
1342                                         }
1343 #endif
1344                                 default:
1345                                         /* TSNH */
1346                                         break;
1347                                 }
1348                         }
1349                         SCTP_TCB_UNLOCK(stcb);
1350                 }
1351         } else {
1352                 SCTP_INP_WLOCK(inp);
1353                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1354                         goto null_return;
1355                 }
1356                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1357                     inp->sctp_hashmark)];
1358                 if (head == NULL) {
1359                         goto null_return;
1360                 }
1361                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1362                         if (stcb->rport != rport) {
1363                                 /* remote port does not match */
1364                                 continue;
1365                         }
1366                         SCTP_TCB_LOCK(stcb);
1367                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1368                                 SCTP_TCB_UNLOCK(stcb);
1369                                 continue;
1370                         }
1371                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1372                                 SCTP_TCB_UNLOCK(stcb);
1373                                 continue;
1374                         }
1375                         /* now look at the list of remote addresses */
1376                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1377 #ifdef INVARIANTS
1378                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1379                                         panic("Corrupt net list");
1380                                 }
1381 #endif
1382                                 if (net->ro._l_addr.sa.sa_family !=
1383                                     remote->sa_family) {
1384                                         /* not the same family */
1385                                         continue;
1386                                 }
1387                                 switch (remote->sa_family) {
1388 #ifdef INET
1389                                 case AF_INET:
1390                                         {
1391                                                 struct sockaddr_in *sin,
1392                                                            *rsin;
1393
1394                                                 sin = (struct sockaddr_in *)
1395                                                     &net->ro._l_addr;
1396                                                 rsin = (struct sockaddr_in *)remote;
1397                                                 if (sin->sin_addr.s_addr ==
1398                                                     rsin->sin_addr.s_addr) {
1399                                                         /* found it */
1400                                                         if (netp != NULL) {
1401                                                                 *netp = net;
1402                                                         }
1403                                                         if (locked_tcb == NULL) {
1404                                                                 SCTP_INP_DECR_REF(inp);
1405                                                         } else if (locked_tcb != stcb) {
1406                                                                 SCTP_TCB_LOCK(locked_tcb);
1407                                                         }
1408                                                         if (locked_tcb) {
1409                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1410                                                         }
1411                                                         SCTP_INP_WUNLOCK(inp);
1412                                                         SCTP_INP_INFO_RUNLOCK();
1413                                                         return (stcb);
1414                                                 }
1415                                                 break;
1416                                         }
1417 #endif
1418 #ifdef INET6
1419                                 case AF_INET6:
1420                                         {
1421                                                 struct sockaddr_in6 *sin6,
1422                                                             *rsin6;
1423
1424                                                 sin6 = (struct sockaddr_in6 *)
1425                                                     &net->ro._l_addr;
1426                                                 rsin6 = (struct sockaddr_in6 *)remote;
1427                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1428                                                     rsin6)) {
1429                                                         /* found it */
1430                                                         if (netp != NULL) {
1431                                                                 *netp = net;
1432                                                         }
1433                                                         if (locked_tcb == NULL) {
1434                                                                 SCTP_INP_DECR_REF(inp);
1435                                                         } else if (locked_tcb != stcb) {
1436                                                                 SCTP_TCB_LOCK(locked_tcb);
1437                                                         }
1438                                                         if (locked_tcb) {
1439                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1440                                                         }
1441                                                         SCTP_INP_WUNLOCK(inp);
1442                                                         SCTP_INP_INFO_RUNLOCK();
1443                                                         return (stcb);
1444                                                 }
1445                                                 break;
1446                                         }
1447 #endif
1448                                 default:
1449                                         /* TSNH */
1450                                         break;
1451                                 }
1452                         }
1453                         SCTP_TCB_UNLOCK(stcb);
1454                 }
1455         }
1456 null_return:
1457         /* clean up for returning null */
1458         if (locked_tcb) {
1459                 SCTP_TCB_LOCK(locked_tcb);
1460                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1461         }
1462         SCTP_INP_WUNLOCK(inp);
1463         SCTP_INP_INFO_RUNLOCK();
1464         /* not found */
1465         return (NULL);
1466 }
1467
1468 /*
1469  * Find an association for a specific endpoint using the association id given
1470  * out in the COMM_UP notification
1471  */
1472
1473 struct sctp_tcb *
1474 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1475 {
1476         /*
1477          * Use my the assoc_id to find a endpoint
1478          */
1479         struct sctpasochead *head;
1480         struct sctp_tcb *stcb;
1481         uint32_t id;
1482
1483         if (inp == NULL) {
1484                 SCTP_PRINTF("TSNH ep_associd\n");
1485                 return (NULL);
1486         }
1487         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1488                 SCTP_PRINTF("TSNH ep_associd0\n");
1489                 return (NULL);
1490         }
1491         id = (uint32_t) asoc_id;
1492         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1493         if (head == NULL) {
1494                 /* invalid id TSNH */
1495                 SCTP_PRINTF("TSNH ep_associd1\n");
1496                 return (NULL);
1497         }
1498         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1499                 if (stcb->asoc.assoc_id == id) {
1500                         if (inp != stcb->sctp_ep) {
1501                                 /*
1502                                  * some other guy has the same id active (id
1503                                  * collision ??).
1504                                  */
1505                                 SCTP_PRINTF("TSNH ep_associd2\n");
1506                                 continue;
1507                         }
1508                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1509                                 continue;
1510                         }
1511                         if (want_lock) {
1512                                 SCTP_TCB_LOCK(stcb);
1513                         }
1514                         return (stcb);
1515                 }
1516         }
1517         return (NULL);
1518 }
1519
1520
1521 struct sctp_tcb *
1522 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1523 {
1524         struct sctp_tcb *stcb;
1525
1526         SCTP_INP_RLOCK(inp);
1527         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1528         SCTP_INP_RUNLOCK(inp);
1529         return (stcb);
1530 }
1531
1532
1533 static struct sctp_inpcb *
1534 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1535     uint16_t lport, uint32_t vrf_id)
1536 {
1537         struct sctp_inpcb *inp;
1538         struct sctp_laddr *laddr;
1539
1540 #ifdef INET
1541         struct sockaddr_in *sin;
1542
1543 #endif
1544 #ifdef INET6
1545         struct sockaddr_in6 *sin6;
1546         struct sockaddr_in6 *intf_addr6;
1547
1548 #endif
1549
1550         int fnd;
1551
1552         /*
1553          * Endpoint probe expects that the INP_INFO is locked.
1554          */
1555 #ifdef INET
1556         sin = NULL;
1557 #endif
1558 #ifdef INET6
1559         sin6 = NULL;
1560 #endif
1561         switch (nam->sa_family) {
1562 #ifdef INET
1563         case AF_INET:
1564                 sin = (struct sockaddr_in *)nam;
1565                 break;
1566 #endif
1567 #ifdef INET6
1568         case AF_INET6:
1569                 sin6 = (struct sockaddr_in6 *)nam;
1570                 break;
1571 #endif
1572         default:
1573                 /* unsupported family */
1574                 return (NULL);
1575         }
1576
1577         if (head == NULL)
1578                 return (NULL);
1579
1580         LIST_FOREACH(inp, head, sctp_hash) {
1581                 SCTP_INP_RLOCK(inp);
1582                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1583                         SCTP_INP_RUNLOCK(inp);
1584                         continue;
1585                 }
1586                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1587                     (inp->sctp_lport == lport)) {
1588                         /* got it */
1589 #ifdef INET
1590                         if ((nam->sa_family == AF_INET) &&
1591                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1592                             SCTP_IPV6_V6ONLY(inp)) {
1593                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1594                                 SCTP_INP_RUNLOCK(inp);
1595                                 continue;
1596                         }
1597 #endif
1598 #ifdef INET6
1599                         /* A V6 address and the endpoint is NOT bound V6 */
1600                         if (nam->sa_family == AF_INET6 &&
1601                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1602                                 SCTP_INP_RUNLOCK(inp);
1603                                 continue;
1604                         }
1605 #endif
1606                         /* does a VRF id match? */
1607                         fnd = 0;
1608                         if (inp->def_vrf_id == vrf_id)
1609                                 fnd = 1;
1610
1611                         SCTP_INP_RUNLOCK(inp);
1612                         if (!fnd)
1613                                 continue;
1614                         return (inp);
1615                 }
1616                 SCTP_INP_RUNLOCK(inp);
1617         }
1618         switch (nam->sa_family) {
1619 #ifdef INET
1620         case AF_INET:
1621                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1622                         /* Can't hunt for one that has no address specified */
1623                         return (NULL);
1624                 }
1625                 break;
1626 #endif
1627 #ifdef INET6
1628         case AF_INET6:
1629                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1630                         /* Can't hunt for one that has no address specified */
1631                         return (NULL);
1632                 }
1633                 break;
1634 #endif
1635         default:
1636                 break;
1637         }
1638         /*
1639          * ok, not bound to all so see if we can find a EP bound to this
1640          * address.
1641          */
1642         LIST_FOREACH(inp, head, sctp_hash) {
1643                 SCTP_INP_RLOCK(inp);
1644                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1645                         SCTP_INP_RUNLOCK(inp);
1646                         continue;
1647                 }
1648                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1649                         SCTP_INP_RUNLOCK(inp);
1650                         continue;
1651                 }
1652                 /*
1653                  * Ok this could be a likely candidate, look at all of its
1654                  * addresses
1655                  */
1656                 if (inp->sctp_lport != lport) {
1657                         SCTP_INP_RUNLOCK(inp);
1658                         continue;
1659                 }
1660                 /* does a VRF id match? */
1661                 fnd = 0;
1662                 if (inp->def_vrf_id == vrf_id)
1663                         fnd = 1;
1664
1665                 if (!fnd) {
1666                         SCTP_INP_RUNLOCK(inp);
1667                         continue;
1668                 }
1669                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1670                         if (laddr->ifa == NULL) {
1671                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1672                                     __FUNCTION__);
1673                                 continue;
1674                         }
1675                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1676                             laddr->ifa);
1677                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1678                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1679                                 continue;
1680                         }
1681                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1682                                 /* possible, see if it matches */
1683                                 switch (nam->sa_family) {
1684 #ifdef INET
1685                                 case AF_INET:
1686                                         if (sin->sin_addr.s_addr ==
1687                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1688                                                 SCTP_INP_RUNLOCK(inp);
1689                                                 return (inp);
1690                                         }
1691                                         break;
1692 #endif
1693 #ifdef INET6
1694                                 case AF_INET6:
1695                                         intf_addr6 = &laddr->ifa->address.sin6;
1696                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1697                                             intf_addr6)) {
1698                                                 SCTP_INP_RUNLOCK(inp);
1699                                                 return (inp);
1700                                         }
1701                                         break;
1702 #endif
1703                                 }
1704                         }
1705                 }
1706                 SCTP_INP_RUNLOCK(inp);
1707         }
1708         return (NULL);
1709 }
1710
1711
1712 static struct sctp_inpcb *
1713 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1714 {
1715         struct sctppcbhead *head;
1716         struct sctp_inpcb *t_inp;
1717         int fnd;
1718
1719         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1720             SCTP_BASE_INFO(hashmark))];
1721         LIST_FOREACH(t_inp, head, sctp_hash) {
1722                 if (t_inp->sctp_lport != lport) {
1723                         continue;
1724                 }
1725                 /* is it in the VRF in question */
1726                 fnd = 0;
1727                 if (t_inp->def_vrf_id == vrf_id)
1728                         fnd = 1;
1729                 if (!fnd)
1730                         continue;
1731
1732                 /* This one is in use. */
1733                 /* check the v6/v4 binding issue */
1734                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1735                     SCTP_IPV6_V6ONLY(t_inp)) {
1736                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1737                                 /* collision in V6 space */
1738                                 return (t_inp);
1739                         } else {
1740                                 /* inp is BOUND_V4 no conflict */
1741                                 continue;
1742                         }
1743                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1744                         /* t_inp is bound v4 and v6, conflict always */
1745                         return (t_inp);
1746                 } else {
1747                         /* t_inp is bound only V4 */
1748                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1749                             SCTP_IPV6_V6ONLY(inp)) {
1750                                 /* no conflict */
1751                                 continue;
1752                         }
1753                         /* else fall through to conflict */
1754                 }
1755                 return (t_inp);
1756         }
1757         return (NULL);
1758 }
1759
1760
1761 int
1762 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1763 {
1764         /* For 1-2-1 with port reuse */
1765         struct sctppcbhead *head;
1766         struct sctp_inpcb *tinp;
1767
1768         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1769                 /* only works with port reuse on */
1770                 return (-1);
1771         }
1772         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1773                 return (0);
1774         }
1775         SCTP_INP_RUNLOCK(inp);
1776         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1777             SCTP_BASE_INFO(hashmark))];
1778         /* Kick out all non-listeners to the TCP hash */
1779         LIST_FOREACH(tinp, head, sctp_hash) {
1780                 if (tinp->sctp_lport != inp->sctp_lport) {
1781                         continue;
1782                 }
1783                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1784                         continue;
1785                 }
1786                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1787                         continue;
1788                 }
1789                 if (tinp->sctp_socket->so_qlimit) {
1790                         continue;
1791                 }
1792                 SCTP_INP_WLOCK(tinp);
1793                 LIST_REMOVE(tinp, sctp_hash);
1794                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1795                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1796                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1797                 SCTP_INP_WUNLOCK(tinp);
1798         }
1799         SCTP_INP_WLOCK(inp);
1800         /* Pull from where he was */
1801         LIST_REMOVE(inp, sctp_hash);
1802         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1803         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1804         LIST_INSERT_HEAD(head, inp, sctp_hash);
1805         SCTP_INP_WUNLOCK(inp);
1806         SCTP_INP_RLOCK(inp);
1807         return (0);
1808 }
1809
1810
1811 struct sctp_inpcb *
1812 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1813     uint32_t vrf_id)
1814 {
1815         /*
1816          * First we check the hash table to see if someone has this port
1817          * bound with just the port.
1818          */
1819         struct sctp_inpcb *inp;
1820         struct sctppcbhead *head;
1821         int lport;
1822         unsigned int i;
1823
1824 #ifdef INET
1825         struct sockaddr_in *sin;
1826
1827 #endif
1828 #ifdef INET6
1829         struct sockaddr_in6 *sin6;
1830
1831 #endif
1832
1833         switch (nam->sa_family) {
1834 #ifdef INET
1835         case AF_INET:
1836                 sin = (struct sockaddr_in *)nam;
1837                 lport = sin->sin_port;
1838                 break;
1839 #endif
1840 #ifdef INET6
1841         case AF_INET6:
1842                 sin6 = (struct sockaddr_in6 *)nam;
1843                 lport = sin6->sin6_port;
1844                 break;
1845 #endif
1846         default:
1847                 return (NULL);
1848         }
1849         /*
1850          * I could cheat here and just cast to one of the types but we will
1851          * do it right. It also provides the check against an Unsupported
1852          * type too.
1853          */
1854         /* Find the head of the ALLADDR chain */
1855         if (have_lock == 0) {
1856                 SCTP_INP_INFO_RLOCK();
1857         }
1858         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1859             SCTP_BASE_INFO(hashmark))];
1860         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1861
1862         /*
1863          * If the TCP model exists it could be that the main listening
1864          * endpoint is gone but there still exists a connected socket for
1865          * this guy. If so we can return the first one that we find. This
1866          * may NOT be the correct one so the caller should be wary on the
1867          * returned INP. Currently the only caller that sets find_tcp_pool
1868          * is in bindx where we are verifying that a user CAN bind the
1869          * address. He either has bound it already, or someone else has, or
1870          * its open to bind, so this is good enough.
1871          */
1872         if (inp == NULL && find_tcp_pool) {
1873                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1874                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1875                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1876                         if (inp) {
1877                                 break;
1878                         }
1879                 }
1880         }
1881         if (inp) {
1882                 SCTP_INP_INCR_REF(inp);
1883         }
1884         if (have_lock == 0) {
1885                 SCTP_INP_INFO_RUNLOCK();
1886         }
1887         return (inp);
1888 }
1889
1890 /*
1891  * Find an association for an endpoint with the pointer to whom you want to
1892  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1893  * need to change the *to to some other struct like a mbuf...
1894  */
1895 struct sctp_tcb *
1896 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1897     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1898     uint32_t vrf_id)
1899 {
1900         struct sctp_inpcb *inp = NULL;
1901         struct sctp_tcb *retval;
1902
1903         SCTP_INP_INFO_RLOCK();
1904         if (find_tcp_pool) {
1905                 if (inp_p != NULL) {
1906                         retval = sctp_tcb_special_locate(inp_p, from, to, netp,
1907                             vrf_id);
1908                 } else {
1909                         retval = sctp_tcb_special_locate(&inp, from, to, netp,
1910                             vrf_id);
1911                 }
1912                 if (retval != NULL) {
1913                         SCTP_INP_INFO_RUNLOCK();
1914                         return (retval);
1915                 }
1916         }
1917         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1918         if (inp_p != NULL) {
1919                 *inp_p = inp;
1920         }
1921         SCTP_INP_INFO_RUNLOCK();
1922
1923         if (inp == NULL) {
1924                 return (NULL);
1925         }
1926         /*
1927          * ok, we have an endpoint, now lets find the assoc for it (if any)
1928          * we now place the source address or from in the to of the find
1929          * endpoint call. Since in reality this chain is used from the
1930          * inbound packet side.
1931          */
1932         if (inp_p != NULL) {
1933                 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1934                     NULL);
1935         } else {
1936                 retval = sctp_findassociation_ep_addr(&inp, from, netp, to,
1937                     NULL);
1938         }
1939         return retval;
1940 }
1941
1942
1943 /*
1944  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1945  * find all addresses that the sender has specified in any address list. Each
1946  * address will be used to lookup the TCB and see if one exits.
1947  */
1948 static struct sctp_tcb *
1949 sctp_findassociation_special_addr(struct mbuf *m, int offset,
1950     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1951     struct sockaddr *dest)
1952 {
1953         struct sctp_paramhdr *phdr, parm_buf;
1954         struct sctp_tcb *retval;
1955         uint32_t ptype, plen;
1956
1957 #ifdef INET
1958         struct sockaddr_in sin4;
1959
1960 #endif
1961 #ifdef INET6
1962         struct sockaddr_in6 sin6;
1963
1964 #endif
1965
1966 #ifdef INET
1967         memset(&sin4, 0, sizeof(sin4));
1968         sin4.sin_len = sizeof(sin4);
1969         sin4.sin_family = AF_INET;
1970         sin4.sin_port = sh->src_port;
1971 #endif
1972 #ifdef INET6
1973         memset(&sin6, 0, sizeof(sin6));
1974         sin6.sin6_len = sizeof(sin6);
1975         sin6.sin6_family = AF_INET6;
1976         sin6.sin6_port = sh->src_port;
1977 #endif
1978
1979         retval = NULL;
1980         offset += sizeof(struct sctp_init_chunk);
1981
1982         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1983         while (phdr != NULL) {
1984                 /* now we must see if we want the parameter */
1985                 ptype = ntohs(phdr->param_type);
1986                 plen = ntohs(phdr->param_length);
1987                 if (plen == 0) {
1988                         break;
1989                 }
1990 #ifdef INET
1991                 if (ptype == SCTP_IPV4_ADDRESS &&
1992                     plen == sizeof(struct sctp_ipv4addr_param)) {
1993                         /* Get the rest of the address */
1994                         struct sctp_ipv4addr_param ip4_parm, *p4;
1995
1996                         phdr = sctp_get_next_param(m, offset,
1997                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
1998                         if (phdr == NULL) {
1999                                 return (NULL);
2000                         }
2001                         p4 = (struct sctp_ipv4addr_param *)phdr;
2002                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2003                         /* look it up */
2004                         retval = sctp_findassociation_ep_addr(inp_p,
2005                             (struct sockaddr *)&sin4, netp, dest, NULL);
2006                         if (retval != NULL) {
2007                                 return (retval);
2008                         }
2009                 }
2010 #endif
2011 #ifdef INET6
2012                 if (ptype == SCTP_IPV6_ADDRESS &&
2013                     plen == sizeof(struct sctp_ipv6addr_param)) {
2014                         /* Get the rest of the address */
2015                         struct sctp_ipv6addr_param ip6_parm, *p6;
2016
2017                         phdr = sctp_get_next_param(m, offset,
2018                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
2019                         if (phdr == NULL) {
2020                                 return (NULL);
2021                         }
2022                         p6 = (struct sctp_ipv6addr_param *)phdr;
2023                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2024                         /* look it up */
2025                         retval = sctp_findassociation_ep_addr(inp_p,
2026                             (struct sockaddr *)&sin6, netp, dest, NULL);
2027                         if (retval != NULL) {
2028                                 return (retval);
2029                         }
2030                 }
2031 #endif
2032                 offset += SCTP_SIZE32(plen);
2033                 phdr = sctp_get_next_param(m, offset, &parm_buf,
2034                     sizeof(parm_buf));
2035         }
2036         return (NULL);
2037 }
2038
2039 static struct sctp_tcb *
2040 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2041     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2042     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2043 {
2044         /*
2045          * Use my vtag to hash. If we find it we then verify the source addr
2046          * is in the assoc. If all goes well we save a bit on rec of a
2047          * packet.
2048          */
2049         struct sctpasochead *head;
2050         struct sctp_nets *net;
2051         struct sctp_tcb *stcb;
2052
2053         *netp = NULL;
2054         *inp_p = NULL;
2055         SCTP_INP_INFO_RLOCK();
2056         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2057             SCTP_BASE_INFO(hashasocmark))];
2058         if (head == NULL) {
2059                 /* invalid vtag */
2060                 SCTP_INP_INFO_RUNLOCK();
2061                 return (NULL);
2062         }
2063         LIST_FOREACH(stcb, head, sctp_asocs) {
2064                 SCTP_INP_RLOCK(stcb->sctp_ep);
2065                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2066                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2067                         continue;
2068                 }
2069                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2070                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2071                         continue;
2072                 }
2073                 SCTP_TCB_LOCK(stcb);
2074                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2075                 if (stcb->asoc.my_vtag == vtag) {
2076                         /* candidate */
2077                         if (stcb->rport != rport) {
2078                                 SCTP_TCB_UNLOCK(stcb);
2079                                 continue;
2080                         }
2081                         if (stcb->sctp_ep->sctp_lport != lport) {
2082                                 SCTP_TCB_UNLOCK(stcb);
2083                                 continue;
2084                         }
2085                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2086                                 SCTP_TCB_UNLOCK(stcb);
2087                                 continue;
2088                         }
2089                         /* RRS:Need toaddr check here */
2090                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2091                                 /* Endpoint does not own this address */
2092                                 SCTP_TCB_UNLOCK(stcb);
2093                                 continue;
2094                         }
2095                         if (remote_tag) {
2096                                 /*
2097                                  * If we have both vtags that's all we match
2098                                  * on
2099                                  */
2100                                 if (stcb->asoc.peer_vtag == remote_tag) {
2101                                         /*
2102                                          * If both tags match we consider it
2103                                          * conclusive and check NO
2104                                          * source/destination addresses
2105                                          */
2106                                         goto conclusive;
2107                                 }
2108                         }
2109                         if (skip_src_check) {
2110                 conclusive:
2111                                 if (from) {
2112                                         *netp = sctp_findnet(stcb, from);
2113                                 } else {
2114                                         *netp = NULL;   /* unknown */
2115                                 }
2116                                 if (inp_p)
2117                                         *inp_p = stcb->sctp_ep;
2118                                 SCTP_INP_INFO_RUNLOCK();
2119                                 return (stcb);
2120                         }
2121                         net = sctp_findnet(stcb, from);
2122                         if (net) {
2123                                 /* yep its him. */
2124                                 *netp = net;
2125                                 SCTP_STAT_INCR(sctps_vtagexpress);
2126                                 *inp_p = stcb->sctp_ep;
2127                                 SCTP_INP_INFO_RUNLOCK();
2128                                 return (stcb);
2129                         } else {
2130                                 /*
2131                                  * not him, this should only happen in rare
2132                                  * cases so I peg it.
2133                                  */
2134                                 SCTP_STAT_INCR(sctps_vtagbogus);
2135                         }
2136                 }
2137                 SCTP_TCB_UNLOCK(stcb);
2138         }
2139         SCTP_INP_INFO_RUNLOCK();
2140         return (NULL);
2141 }
2142
2143 /*
2144  * Find an association with the pointer to the inbound IP packet. This can be
2145  * a IPv4 or IPv6 packet.
2146  */
2147 struct sctp_tcb *
2148 sctp_findassociation_addr(struct mbuf *m, int offset,
2149     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2150     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2151 {
2152         int find_tcp_pool;
2153         struct ip *iph;
2154         struct sctp_tcb *retval;
2155         struct sockaddr_storage to_store, from_store;
2156         struct sockaddr *to = (struct sockaddr *)&to_store;
2157         struct sockaddr *from = (struct sockaddr *)&from_store;
2158         struct sctp_inpcb *inp;
2159
2160         iph = mtod(m, struct ip *);
2161         switch (iph->ip_v) {
2162 #ifdef INET
2163         case IPVERSION:
2164                 {
2165                         /* its IPv4 */
2166                         struct sockaddr_in *from4;
2167
2168                         from4 = (struct sockaddr_in *)&from_store;
2169                         bzero(from4, sizeof(*from4));
2170                         from4->sin_family = AF_INET;
2171                         from4->sin_len = sizeof(struct sockaddr_in);
2172                         from4->sin_addr.s_addr = iph->ip_src.s_addr;
2173                         from4->sin_port = sh->src_port;
2174                         break;
2175                 }
2176 #endif
2177 #ifdef INET6
2178         case IPV6_VERSION >> 4:
2179                 {
2180                         /* its IPv6 */
2181                         struct ip6_hdr *ip6;
2182                         struct sockaddr_in6 *from6;
2183
2184                         ip6 = mtod(m, struct ip6_hdr *);
2185                         from6 = (struct sockaddr_in6 *)&from_store;
2186                         bzero(from6, sizeof(*from6));
2187                         from6->sin6_family = AF_INET6;
2188                         from6->sin6_len = sizeof(struct sockaddr_in6);
2189                         from6->sin6_addr = ip6->ip6_src;
2190                         from6->sin6_port = sh->src_port;
2191                         /* Get the scopes in properly to the sin6 addr's */
2192                         /* we probably don't need these operations */
2193                         (void)sa6_recoverscope(from6);
2194                         sa6_embedscope(from6, MODULE_GLOBAL(ip6_use_defzone));
2195                         break;
2196                 }
2197 #endif
2198         default:
2199                 /* Currently not supported. */
2200                 return (NULL);
2201         }
2202
2203
2204         switch (iph->ip_v) {
2205 #ifdef INET
2206         case IPVERSION:
2207                 {
2208                         /* its IPv4 */
2209                         struct sockaddr_in *to4;
2210
2211                         to4 = (struct sockaddr_in *)&to_store;
2212                         bzero(to4, sizeof(*to4));
2213                         to4->sin_family = AF_INET;
2214                         to4->sin_len = sizeof(struct sockaddr_in);
2215                         to4->sin_addr.s_addr = iph->ip_dst.s_addr;
2216                         to4->sin_port = sh->dest_port;
2217                         break;
2218                 }
2219 #endif
2220 #ifdef INET6
2221         case IPV6_VERSION >> 4:
2222                 {
2223                         /* its IPv6 */
2224                         struct ip6_hdr *ip6;
2225                         struct sockaddr_in6 *to6;
2226
2227                         ip6 = mtod(m, struct ip6_hdr *);
2228                         to6 = (struct sockaddr_in6 *)&to_store;
2229                         bzero(to6, sizeof(*to6));
2230                         to6->sin6_family = AF_INET6;
2231                         to6->sin6_len = sizeof(struct sockaddr_in6);
2232                         to6->sin6_addr = ip6->ip6_dst;
2233                         to6->sin6_port = sh->dest_port;
2234                         /* Get the scopes in properly to the sin6 addr's */
2235                         /* we probably don't need these operations */
2236                         (void)sa6_recoverscope(to6);
2237                         sa6_embedscope(to6, MODULE_GLOBAL(ip6_use_defzone));
2238                         break;
2239                 }
2240 #endif
2241         default:
2242                 /* TSNH */
2243                 break;
2244         }
2245         if (sh->v_tag) {
2246                 /* we only go down this path if vtag is non-zero */
2247                 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag),
2248                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2249                 if (retval) {
2250                         return (retval);
2251                 }
2252         }
2253         find_tcp_pool = 0;
2254         if ((ch->chunk_type != SCTP_INITIATION) &&
2255             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2256             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2257             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2258                 /* Other chunk types go to the tcp pool. */
2259                 find_tcp_pool = 1;
2260         }
2261         if (inp_p) {
2262                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
2263                     find_tcp_pool, vrf_id);
2264                 inp = *inp_p;
2265         } else {
2266                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
2267                     find_tcp_pool, vrf_id);
2268         }
2269         SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp);
2270         if (retval == NULL && inp) {
2271                 /* Found a EP but not this address */
2272                 if ((ch->chunk_type == SCTP_INITIATION) ||
2273                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2274                         /*-
2275                          * special hook, we do NOT return linp or an
2276                          * association that is linked to an existing
2277                          * association that is under the TCP pool (i.e. no
2278                          * listener exists). The endpoint finding routine
2279                          * will always find a listener before examining the
2280                          * TCP pool.
2281                          */
2282                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2283                                 if (inp_p) {
2284                                         *inp_p = NULL;
2285                                 }
2286                                 return (NULL);
2287                         }
2288                         retval = sctp_findassociation_special_addr(m,
2289                             offset, sh, &inp, netp, to);
2290                         if (inp_p != NULL) {
2291                                 *inp_p = inp;
2292                         }
2293                 }
2294         }
2295         SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval);
2296         return (retval);
2297 }
2298
2299 /*
2300  * lookup an association by an ASCONF lookup address.
2301  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2302  */
2303 struct sctp_tcb *
2304 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2305     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2306 {
2307         struct sctp_tcb *stcb;
2308         struct sockaddr_storage local_store, remote_store;
2309         struct sockaddr *to;
2310         struct ip *iph;
2311         struct sctp_paramhdr parm_buf, *phdr;
2312         int ptype;
2313         int zero_address = 0;
2314
2315 #ifdef INET
2316         struct sockaddr_in *sin;
2317
2318 #endif
2319 #ifdef INET6
2320         struct ip6_hdr *ip6;
2321         struct sockaddr_in6 *sin6;
2322
2323 #endif
2324
2325         memset(&local_store, 0, sizeof(local_store));
2326         memset(&remote_store, 0, sizeof(remote_store));
2327         to = (struct sockaddr *)&local_store;
2328         /* First get the destination address setup too. */
2329         iph = mtod(m, struct ip *);
2330         switch (iph->ip_v) {
2331 #ifdef INET
2332         case IPVERSION:
2333                 /* its IPv4 */
2334                 sin = (struct sockaddr_in *)&local_store;
2335                 sin->sin_family = AF_INET;
2336                 sin->sin_len = sizeof(*sin);
2337                 sin->sin_port = sh->dest_port;
2338                 sin->sin_addr.s_addr = iph->ip_dst.s_addr;
2339                 break;
2340 #endif
2341 #ifdef INET6
2342         case IPV6_VERSION >> 4:
2343                 /* its IPv6 */
2344                 ip6 = mtod(m, struct ip6_hdr *);
2345                 sin6 = (struct sockaddr_in6 *)&local_store;
2346                 sin6->sin6_family = AF_INET6;
2347                 sin6->sin6_len = sizeof(*sin6);
2348                 sin6->sin6_port = sh->dest_port;
2349                 sin6->sin6_addr = ip6->ip6_dst;
2350                 break;
2351 #endif
2352         default:
2353                 return NULL;
2354         }
2355
2356         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2357             &parm_buf, sizeof(struct sctp_paramhdr));
2358         if (phdr == NULL) {
2359                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2360                     __FUNCTION__);
2361                 return NULL;
2362         }
2363         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2364         /* get the correlation address */
2365         switch (ptype) {
2366 #ifdef INET6
2367         case SCTP_IPV6_ADDRESS:
2368                 {
2369                         /* ipv6 address param */
2370                         struct sctp_ipv6addr_param *p6, p6_buf;
2371
2372                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2373                                 return NULL;
2374                         }
2375                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2376                             offset + sizeof(struct sctp_asconf_chunk),
2377                             &p6_buf.ph, sizeof(*p6));
2378                         if (p6 == NULL) {
2379                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2380                                     __FUNCTION__);
2381                                 return (NULL);
2382                         }
2383                         sin6 = (struct sockaddr_in6 *)&remote_store;
2384                         sin6->sin6_family = AF_INET6;
2385                         sin6->sin6_len = sizeof(*sin6);
2386                         sin6->sin6_port = sh->src_port;
2387                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2388                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2389                                 zero_address = 1;
2390                         break;
2391                 }
2392 #endif
2393 #ifdef INET
2394         case SCTP_IPV4_ADDRESS:
2395                 {
2396                         /* ipv4 address param */
2397                         struct sctp_ipv4addr_param *p4, p4_buf;
2398
2399                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2400                                 return NULL;
2401                         }
2402                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2403                             offset + sizeof(struct sctp_asconf_chunk),
2404                             &p4_buf.ph, sizeof(*p4));
2405                         if (p4 == NULL) {
2406                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2407                                     __FUNCTION__);
2408                                 return (NULL);
2409                         }
2410                         sin = (struct sockaddr_in *)&remote_store;
2411                         sin->sin_family = AF_INET;
2412                         sin->sin_len = sizeof(*sin);
2413                         sin->sin_port = sh->src_port;
2414                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2415                         if (sin->sin_addr.s_addr == INADDR_ANY)
2416                                 zero_address = 1;
2417                         break;
2418                 }
2419 #endif
2420         default:
2421                 /* invalid address param type */
2422                 return NULL;
2423         }
2424
2425         if (zero_address) {
2426                 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p,
2427                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2428                 /*
2429                  * SCTP_PRINTF("findassociation_ep_asconf: zero lookup
2430                  * address finds stcb 0x%x\n", (uint32_t)stcb);
2431                  */
2432         } else {
2433                 stcb = sctp_findassociation_ep_addr(inp_p,
2434                     (struct sockaddr *)&remote_store, netp,
2435                     to, NULL);
2436         }
2437         return (stcb);
2438 }
2439
2440
2441 /*
2442  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2443  * addresses. This way if we don't get a bind we by default pick a ephemeral
2444  * port with all addresses bound.
2445  */
2446 int
2447 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2448 {
2449         /*
2450          * we get called when a new endpoint starts up. We need to allocate
2451          * the sctp_inpcb structure from the zone and init it. Mark it as
2452          * unbound and find a port that we can use as an ephemeral with
2453          * INADDR_ANY. If the user binds later no problem we can then add in
2454          * the specific addresses. And setup the default parameters for the
2455          * EP.
2456          */
2457         int i, error;
2458         struct sctp_inpcb *inp;
2459         struct sctp_pcb *m;
2460         struct timeval time;
2461         sctp_sharedkey_t *null_key;
2462
2463         error = 0;
2464
2465         SCTP_INP_INFO_WLOCK();
2466         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2467         if (inp == NULL) {
2468                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2469                 SCTP_INP_INFO_WUNLOCK();
2470                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2471                 return (ENOBUFS);
2472         }
2473         /* zap it */
2474         bzero(inp, sizeof(*inp));
2475
2476         /* bump generations */
2477         /* setup socket pointers */
2478         inp->sctp_socket = so;
2479         inp->ip_inp.inp.inp_socket = so;
2480 #ifdef INET6
2481         if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2482                 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2483         }
2484 #endif
2485         inp->sctp_associd_counter = 1;
2486         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2487         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2488         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2489         inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable);
2490         /* init the small hash table we use to track asocid <-> tcb */
2491         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2492         if (inp->sctp_asocidhash == NULL) {
2493                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2494                 SCTP_INP_INFO_WUNLOCK();
2495                 return (ENOBUFS);
2496         }
2497 #ifdef IPSEC
2498         {
2499                 struct inpcbpolicy *pcb_sp = NULL;
2500
2501                 error = ipsec_init_policy(so, &pcb_sp);
2502                 /* Arrange to share the policy */
2503                 inp->ip_inp.inp.inp_sp = pcb_sp;
2504                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2505         }
2506         if (error != 0) {
2507                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2508                 SCTP_INP_INFO_WUNLOCK();
2509                 return error;
2510         }
2511 #endif                          /* IPSEC */
2512         SCTP_INCR_EP_COUNT();
2513         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2514         SCTP_INP_INFO_WUNLOCK();
2515
2516         so->so_pcb = (caddr_t)inp;
2517
2518         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2519                 /* UDP style socket */
2520                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2521                     SCTP_PCB_FLAGS_UNBOUND);
2522                 /* Be sure it is NON-BLOCKING IO for UDP */
2523                 /* SCTP_SET_SO_NBIO(so); */
2524         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2525                 /* TCP style socket */
2526                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2527                     SCTP_PCB_FLAGS_UNBOUND);
2528                 /* Be sure we have blocking IO by default */
2529                 SCTP_CLEAR_SO_NBIO(so);
2530         } else {
2531                 /*
2532                  * unsupported socket type (RAW, etc)- in case we missed it
2533                  * in protosw
2534                  */
2535                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2536                 so->so_pcb = NULL;
2537                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2538                 return (EOPNOTSUPP);
2539         }
2540         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2541                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2542                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2543         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2544                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2545                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2546         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2547                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2548                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2549         }
2550         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2551             &inp->sctp_hashmark);
2552         if (inp->sctp_tcbhash == NULL) {
2553                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2554                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2555                 so->so_pcb = NULL;
2556                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2557                 return (ENOBUFS);
2558         }
2559         inp->def_vrf_id = vrf_id;
2560
2561         SCTP_INP_INFO_WLOCK();
2562         SCTP_INP_LOCK_INIT(inp);
2563         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2564         SCTP_INP_READ_INIT(inp);
2565         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2566         /* lock the new ep */
2567         SCTP_INP_WLOCK(inp);
2568
2569         /* add it to the info area */
2570         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2571         SCTP_INP_INFO_WUNLOCK();
2572
2573         TAILQ_INIT(&inp->read_queue);
2574         LIST_INIT(&inp->sctp_addr_list);
2575
2576         LIST_INIT(&inp->sctp_asoc_list);
2577
2578 #ifdef SCTP_TRACK_FREED_ASOCS
2579         /* TEMP CODE */
2580         LIST_INIT(&inp->sctp_asoc_free_list);
2581 #endif
2582         /* Init the timer structure for signature change */
2583         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2584         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2585
2586         /* now init the actual endpoint default data */
2587         m = &inp->sctp_ep;
2588
2589         /* setup the base timeout information */
2590         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2591         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2592         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2593         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2594         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2595         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2596         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2597         /* all max/min max are in ms */
2598         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2599         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2600         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2601         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2602         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2603
2604         m->max_open_streams_intome = MAX_SCTP_STREAMS;
2605
2606         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2607         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2608         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2609         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2610         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2611         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2612         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2613         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2614
2615         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2616         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2617         /* number of streams to pre-open on a association */
2618         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2619
2620         /* Add adaptation cookie */
2621         m->adaptation_layer_indicator = 0x504C5253;
2622
2623         /* seed random number generator */
2624         m->random_counter = 1;
2625         m->store_at = SCTP_SIGNATURE_SIZE;
2626         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2627         sctp_fill_random_store(m);
2628
2629         /* Minimum cookie size */
2630         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2631             sizeof(struct sctp_state_cookie);
2632         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2633
2634         /* Setup the initial secret */
2635         (void)SCTP_GETTIME_TIMEVAL(&time);
2636         m->time_of_secret_change = time.tv_sec;
2637
2638         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2639                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2640         }
2641         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2642
2643         /* How long is a cookie good for ? */
2644         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2645         /*
2646          * Initialize authentication parameters
2647          */
2648         m->local_hmacs = sctp_default_supported_hmaclist();
2649         m->local_auth_chunks = sctp_alloc_chunklist();
2650         m->default_dscp = 0;
2651 #ifdef INET6
2652         m->default_flowlabel = 0;
2653 #endif
2654         m->port = 0;            /* encapsulation disabled by default */
2655         sctp_auth_set_default_chunks(m->local_auth_chunks);
2656         LIST_INIT(&m->shared_keys);
2657         /* add default NULL key as key id 0 */
2658         null_key = sctp_alloc_sharedkey();
2659         sctp_insert_sharedkey(&m->shared_keys, null_key);
2660         SCTP_INP_WUNLOCK(inp);
2661 #ifdef SCTP_LOG_CLOSING
2662         sctp_log_closing(inp, NULL, 12);
2663 #endif
2664         return (error);
2665 }
2666
2667
2668 void
2669 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2670     struct sctp_tcb *stcb)
2671 {
2672         struct sctp_nets *net;
2673         uint16_t lport, rport;
2674         struct sctppcbhead *head;
2675         struct sctp_laddr *laddr, *oladdr;
2676
2677         atomic_add_int(&stcb->asoc.refcnt, 1);
2678         SCTP_TCB_UNLOCK(stcb);
2679         SCTP_INP_INFO_WLOCK();
2680         SCTP_INP_WLOCK(old_inp);
2681         SCTP_INP_WLOCK(new_inp);
2682         SCTP_TCB_LOCK(stcb);
2683         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2684
2685         new_inp->sctp_ep.time_of_secret_change =
2686             old_inp->sctp_ep.time_of_secret_change;
2687         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2688             sizeof(old_inp->sctp_ep.secret_key));
2689         new_inp->sctp_ep.current_secret_number =
2690             old_inp->sctp_ep.current_secret_number;
2691         new_inp->sctp_ep.last_secret_number =
2692             old_inp->sctp_ep.last_secret_number;
2693         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2694
2695         /* make it so new data pours into the new socket */
2696         stcb->sctp_socket = new_inp->sctp_socket;
2697         stcb->sctp_ep = new_inp;
2698
2699         /* Copy the port across */
2700         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2701         rport = stcb->rport;
2702         /* Pull the tcb from the old association */
2703         LIST_REMOVE(stcb, sctp_tcbhash);
2704         LIST_REMOVE(stcb, sctp_tcblist);
2705         if (stcb->asoc.in_asocid_hash) {
2706                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2707         }
2708         /* Now insert the new_inp into the TCP connected hash */
2709         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2710
2711         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2712         /* Its safe to access */
2713         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2714
2715         /* Now move the tcb into the endpoint list */
2716         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2717         /*
2718          * Question, do we even need to worry about the ep-hash since we
2719          * only have one connection? Probably not :> so lets get rid of it
2720          * and not suck up any kernel memory in that.
2721          */
2722         if (stcb->asoc.in_asocid_hash) {
2723                 struct sctpasochead *lhd;
2724
2725                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2726                     new_inp->hashasocidmark)];
2727                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2728         }
2729         /* Ok. Let's restart timer. */
2730         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2731                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2732                     stcb, net);
2733         }
2734
2735         SCTP_INP_INFO_WUNLOCK();
2736         if (new_inp->sctp_tcbhash != NULL) {
2737                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2738                 new_inp->sctp_tcbhash = NULL;
2739         }
2740         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2741                 /* Subset bound, so copy in the laddr list from the old_inp */
2742                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2743                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2744                         if (laddr == NULL) {
2745                                 /*
2746                                  * Gak, what can we do? This assoc is really
2747                                  * HOSED. We probably should send an abort
2748                                  * here.
2749                                  */
2750                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2751                                 continue;
2752                         }
2753                         SCTP_INCR_LADDR_COUNT();
2754                         bzero(laddr, sizeof(*laddr));
2755                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2756                         laddr->ifa = oladdr->ifa;
2757                         atomic_add_int(&laddr->ifa->refcount, 1);
2758                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2759                             sctp_nxt_addr);
2760                         new_inp->laddr_count++;
2761                         if (oladdr == stcb->asoc.last_used_address) {
2762                                 stcb->asoc.last_used_address = laddr;
2763                         }
2764                 }
2765         }
2766         /*
2767          * Now any running timers need to be adjusted since we really don't
2768          * care if they are running or not just blast in the new_inp into
2769          * all of them.
2770          */
2771
2772         stcb->asoc.dack_timer.ep = (void *)new_inp;
2773         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2774         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2775         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2776         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2777         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2778         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2779         /* now what about the nets? */
2780         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2781                 net->pmtu_timer.ep = (void *)new_inp;
2782                 net->hb_timer.ep = (void *)new_inp;
2783                 net->rxt_timer.ep = (void *)new_inp;
2784         }
2785         SCTP_INP_WUNLOCK(new_inp);
2786         SCTP_INP_WUNLOCK(old_inp);
2787 }
2788
2789
2790
2791
2792 /* sctp_ifap is used to bypass normal local address validation checks */
2793 int
2794 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2795     struct sctp_ifa *sctp_ifap, struct thread *p)
2796 {
2797         /* bind a ep to a socket address */
2798         struct sctppcbhead *head;
2799         struct sctp_inpcb *inp, *inp_tmp;
2800         struct inpcb *ip_inp;
2801         int port_reuse_active = 0;
2802         int bindall;
2803         uint16_t lport;
2804         int error;
2805         uint32_t vrf_id;
2806
2807         lport = 0;
2808         error = 0;
2809         bindall = 1;
2810         inp = (struct sctp_inpcb *)so->so_pcb;
2811         ip_inp = (struct inpcb *)so->so_pcb;
2812 #ifdef SCTP_DEBUG
2813         if (addr) {
2814                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
2815                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2816                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
2817                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2818         }
2819 #endif
2820         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2821                 /* already did a bind, subsequent binds NOT allowed ! */
2822                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2823                 return (EINVAL);
2824         }
2825 #ifdef INVARIANTS
2826         if (p == NULL)
2827                 panic("null proc/thread");
2828 #endif
2829         if (addr != NULL) {
2830                 switch (addr->sa_family) {
2831 #ifdef INET
2832                 case AF_INET:
2833                         {
2834                                 struct sockaddr_in *sin;
2835
2836                                 /* IPV6_V6ONLY socket? */
2837                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2838                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2839                                         return (EINVAL);
2840                                 }
2841                                 if (addr->sa_len != sizeof(*sin)) {
2842                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2843                                         return (EINVAL);
2844                                 }
2845                                 sin = (struct sockaddr_in *)addr;
2846                                 lport = sin->sin_port;
2847                                 /*
2848                                  * For LOOPBACK the prison_local_ip4() call
2849                                  * will transmute the ip address to the
2850                                  * proper value.
2851                                  */
2852                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2853                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2854                                         return (error);
2855                                 }
2856                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2857                                         bindall = 0;
2858                                 }
2859                                 break;
2860                         }
2861 #endif
2862 #ifdef INET6
2863                 case AF_INET6:
2864                         {
2865                                 /*
2866                                  * Only for pure IPv6 Address. (No IPv4
2867                                  * Mapped!)
2868                                  */
2869                                 struct sockaddr_in6 *sin6;
2870
2871                                 sin6 = (struct sockaddr_in6 *)addr;
2872
2873                                 if (addr->sa_len != sizeof(*sin6)) {
2874                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2875                                         return (EINVAL);
2876                                 }
2877                                 lport = sin6->sin6_port;
2878
2879                                 /*
2880                                  * For LOOPBACK the prison_local_ip6() call
2881                                  * will transmute the ipv6 address to the
2882                                  * proper value.
2883                                  */
2884                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2885                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2886                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2887                                         return (error);
2888                                 }
2889                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2890                                         bindall = 0;
2891                                         /* KAME hack: embed scopeid */
2892                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2893                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2894                                                 return (EINVAL);
2895                                         }
2896                                 }
2897                                 /* this must be cleared for ifa_ifwithaddr() */
2898                                 sin6->sin6_scope_id = 0;
2899                                 break;
2900                         }
2901 #endif
2902                 default:
2903                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2904                         return (EAFNOSUPPORT);
2905                 }
2906         }
2907         SCTP_INP_INFO_WLOCK();
2908         SCTP_INP_WLOCK(inp);
2909         /* Setup a vrf_id to be the default for the non-bind-all case. */
2910         vrf_id = inp->def_vrf_id;
2911
2912         /* increase our count due to the unlock we do */
2913         SCTP_INP_INCR_REF(inp);
2914         if (lport) {
2915                 /*
2916                  * Did the caller specify a port? if so we must see if a ep
2917                  * already has this one bound.
2918                  */
2919                 /* got to be root to get at low ports */
2920                 if (ntohs(lport) < IPPORT_RESERVED) {
2921                         if (p && (error =
2922                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2923                             )) {
2924                                 SCTP_INP_DECR_REF(inp);
2925                                 SCTP_INP_WUNLOCK(inp);
2926                                 SCTP_INP_INFO_WUNLOCK();
2927                                 return (error);
2928                         }
2929                 }
2930                 if (p == NULL) {
2931                         SCTP_INP_DECR_REF(inp);
2932                         SCTP_INP_WUNLOCK(inp);
2933                         SCTP_INP_INFO_WUNLOCK();
2934                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2935                         return (error);
2936                 }
2937                 SCTP_INP_WUNLOCK(inp);
2938                 if (bindall) {
2939                         vrf_id = inp->def_vrf_id;
2940                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2941                         if (inp_tmp != NULL) {
2942                                 /*
2943                                  * lock guy returned and lower count note
2944                                  * that we are not bound so inp_tmp should
2945                                  * NEVER be inp. And it is this inp
2946                                  * (inp_tmp) that gets the reference bump,
2947                                  * so we must lower it.
2948                                  */
2949                                 SCTP_INP_DECR_REF(inp_tmp);
2950                                 /* unlock info */
2951                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2952                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2953                                         /*
2954                                          * Ok, must be one-2-one and
2955                                          * allowing port re-use
2956                                          */
2957                                         port_reuse_active = 1;
2958                                         goto continue_anyway;
2959                                 }
2960                                 SCTP_INP_DECR_REF(inp);
2961                                 SCTP_INP_INFO_WUNLOCK();
2962                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2963                                 return (EADDRINUSE);
2964                         }
2965                 } else {
2966                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2967                         if (inp_tmp != NULL) {
2968                                 /*
2969                                  * lock guy returned and lower count note
2970                                  * that we are not bound so inp_tmp should
2971                                  * NEVER be inp. And it is this inp
2972                                  * (inp_tmp) that gets the reference bump,
2973                                  * so we must lower it.
2974                                  */
2975                                 SCTP_INP_DECR_REF(inp_tmp);
2976                                 /* unlock info */
2977                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2978                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2979                                         /*
2980                                          * Ok, must be one-2-one and
2981                                          * allowing port re-use
2982                                          */
2983                                         port_reuse_active = 1;
2984                                         goto continue_anyway;
2985                                 }
2986                                 SCTP_INP_DECR_REF(inp);
2987                                 SCTP_INP_INFO_WUNLOCK();
2988                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2989                                 return (EADDRINUSE);
2990                         }
2991                 }
2992 continue_anyway:
2993                 SCTP_INP_WLOCK(inp);
2994                 if (bindall) {
2995                         /* verify that no lport is not used by a singleton */
2996                         if ((port_reuse_active == 0) &&
2997                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))
2998                             ) {
2999                                 /* Sorry someone already has this one bound */
3000                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3001                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3002                                         port_reuse_active = 1;
3003                                 } else {
3004                                         SCTP_INP_DECR_REF(inp);
3005                                         SCTP_INP_WUNLOCK(inp);
3006                                         SCTP_INP_INFO_WUNLOCK();
3007                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3008                                         return (EADDRINUSE);
3009                                 }
3010                         }
3011                 }
3012         } else {
3013                 uint16_t first, last, candidate;
3014                 uint16_t count;
3015                 int done;
3016
3017                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3018                         first = MODULE_GLOBAL(ipport_hifirstauto);
3019                         last = MODULE_GLOBAL(ipport_hilastauto);
3020                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3021                         if (p && (error =
3022                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3023                             )) {
3024                                 SCTP_INP_DECR_REF(inp);
3025                                 SCTP_INP_WUNLOCK(inp);
3026                                 SCTP_INP_INFO_WUNLOCK();
3027                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3028                                 return (error);
3029                         }
3030                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3031                         last = MODULE_GLOBAL(ipport_lowlastauto);
3032                 } else {
3033                         first = MODULE_GLOBAL(ipport_firstauto);
3034                         last = MODULE_GLOBAL(ipport_lastauto);
3035                 }
3036                 if (first > last) {
3037                         uint16_t temp;
3038
3039                         temp = first;
3040                         first = last;
3041                         last = temp;
3042                 }
3043                 count = last - first + 1;       /* number of candidates */
3044                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3045
3046                 done = 0;
3047                 while (!done) {
3048                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3049                                 done = 1;
3050                         }
3051                         if (!done) {
3052                                 if (--count == 0) {
3053                                         SCTP_INP_DECR_REF(inp);
3054                                         SCTP_INP_WUNLOCK(inp);
3055                                         SCTP_INP_INFO_WUNLOCK();
3056                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3057                                         return (EADDRINUSE);
3058                                 }
3059                                 if (candidate == last)
3060                                         candidate = first;
3061                                 else
3062                                         candidate = candidate + 1;
3063                         }
3064                 }
3065                 lport = htons(candidate);
3066         }
3067         SCTP_INP_DECR_REF(inp);
3068         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3069             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3070                 /*
3071                  * this really should not happen. The guy did a non-blocking
3072                  * bind and then did a close at the same time.
3073                  */
3074                 SCTP_INP_WUNLOCK(inp);
3075                 SCTP_INP_INFO_WUNLOCK();
3076                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3077                 return (EINVAL);
3078         }
3079         /* ok we look clear to give out this port, so lets setup the binding */
3080         if (bindall) {
3081                 /* binding to all addresses, so just set in the proper flags */
3082                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3083                 /* set the automatic addr changes from kernel flag */
3084                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3085                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3086                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3087                 } else {
3088                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3089                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3090                 }
3091                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3092                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3093                 } else {
3094                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3095                 }
3096                 /*
3097                  * set the automatic mobility_base from kernel flag (by
3098                  * micchie)
3099                  */
3100                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3101                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3102                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3103                 } else {
3104                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3105                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3106                 }
3107                 /*
3108                  * set the automatic mobility_fasthandoff from kernel flag
3109                  * (by micchie)
3110                  */
3111                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3112                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3113                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3114                 } else {
3115                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3116                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3117                 }
3118         } else {
3119                 /*
3120                  * bind specific, make sure flags is off and add a new
3121                  * address structure to the sctp_addr_list inside the ep
3122                  * structure.
3123                  *
3124                  * We will need to allocate one and insert it at the head. The
3125                  * socketopt call can just insert new addresses in there as
3126                  * well. It will also have to do the embed scope kame hack
3127                  * too (before adding).
3128                  */
3129                 struct sctp_ifa *ifa;
3130                 struct sockaddr_storage store_sa;
3131
3132                 memset(&store_sa, 0, sizeof(store_sa));
3133                 switch (addr->sa_family) {
3134                 case AF_INET:
3135                         {
3136                                 struct sockaddr_in *sin;
3137
3138                                 sin = (struct sockaddr_in *)&store_sa;
3139                                 memcpy(sin, addr, sizeof(struct sockaddr_in));
3140                                 sin->sin_port = 0;
3141                                 break;
3142                         }
3143                 case AF_INET6:
3144                         {
3145                                 struct sockaddr_in6 *sin6;
3146
3147                                 sin6 = (struct sockaddr_in6 *)&store_sa;
3148                                 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3149                                 sin6->sin6_port = 0;
3150                                 break;
3151                         }
3152                 default:
3153                         break;
3154                 }
3155                 /*
3156                  * first find the interface with the bound address need to
3157                  * zero out the port to find the address! yuck! can't do
3158                  * this earlier since need port for sctp_pcb_findep()
3159                  */
3160                 if (sctp_ifap != NULL)
3161                         ifa = sctp_ifap;
3162                 else {
3163                         /*
3164                          * Note for BSD we hit here always other O/S's will
3165                          * pass things in via the sctp_ifap argument
3166                          * (Panda).
3167                          */
3168                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3169                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3170                 }
3171                 if (ifa == NULL) {
3172                         /* Can't find an interface with that address */
3173                         SCTP_INP_WUNLOCK(inp);
3174                         SCTP_INP_INFO_WUNLOCK();
3175                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3176                         return (EADDRNOTAVAIL);
3177                 }
3178 #ifdef INET6
3179                 if (addr->sa_family == AF_INET6) {
3180                         /* GAK, more FIXME IFA lock? */
3181                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3182                                 /* Can't bind a non-existent addr. */
3183                                 SCTP_INP_WUNLOCK(inp);
3184                                 SCTP_INP_INFO_WUNLOCK();
3185                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3186                                 return (EINVAL);
3187                         }
3188                 }
3189 #endif
3190                 /* we're not bound all */
3191                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3192                 /* allow bindx() to send ASCONF's for binding changes */
3193                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3194                 /* clear automatic addr changes from kernel flag */
3195                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3196
3197                 /* add this address to the endpoint list */
3198                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3199                 if (error != 0) {
3200                         SCTP_INP_WUNLOCK(inp);
3201                         SCTP_INP_INFO_WUNLOCK();
3202                         return (error);
3203                 }
3204                 inp->laddr_count++;
3205         }
3206         /* find the bucket */
3207         if (port_reuse_active) {
3208                 /* Put it into tcp 1-2-1 hash */
3209                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3210                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3211         } else {
3212                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3213         }
3214         /* put it in the bucket */
3215         LIST_INSERT_HEAD(head, inp, sctp_hash);
3216         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3217             head, ntohs(lport), port_reuse_active);
3218         /* set in the port */
3219         inp->sctp_lport = lport;
3220
3221         /* turn off just the unbound flag */
3222         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3223         SCTP_INP_WUNLOCK(inp);
3224         SCTP_INP_INFO_WUNLOCK();
3225         return (0);
3226 }
3227
3228
3229 static void
3230 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3231 {
3232         struct sctp_iterator *it, *nit;
3233
3234         /*
3235          * We enter with the only the ITERATOR_LOCK in place and a write
3236          * lock on the inp_info stuff.
3237          */
3238         it = sctp_it_ctl.cur_it;
3239         if (it && (it->vn != curvnet)) {
3240                 /* Its not looking at our VNET */
3241                 return;
3242         }
3243         if (it && (it->inp == inp)) {
3244                 /*
3245                  * This is tricky and we hold the iterator lock, but when it
3246                  * returns and gets the lock (when we release it) the
3247                  * iterator will try to operate on inp. We need to stop that
3248                  * from happening. But of course the iterator has a
3249                  * reference on the stcb and inp. We can mark it and it will
3250                  * stop.
3251                  *
3252                  * If its a single iterator situation, we set the end iterator
3253                  * flag. Otherwise we set the iterator to go to the next
3254                  * inp.
3255                  *
3256                  */
3257                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3258                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3259                 } else {
3260                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3261                 }
3262         }
3263         /*
3264          * Now go through and remove any single reference to our inp that
3265          * may be still pending on the list
3266          */
3267         SCTP_IPI_ITERATOR_WQ_LOCK();
3268         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3269                 if (it->vn != curvnet) {
3270                         continue;
3271                 }
3272                 if (it->inp == inp) {
3273                         /* This one points to me is it inp specific? */
3274                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3275                                 /* Remove and free this one */
3276                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3277                                     it, sctp_nxt_itr);
3278                                 if (it->function_atend != NULL) {
3279                                         (*it->function_atend) (it->pointer, it->val);
3280                                 }
3281                                 SCTP_FREE(it, SCTP_M_ITER);
3282                         } else {
3283                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3284                                 if (it->inp) {
3285                                         SCTP_INP_INCR_REF(it->inp);
3286                                 }
3287                         }
3288                         /*
3289                          * When its put in the refcnt is incremented so decr
3290                          * it
3291                          */
3292                         SCTP_INP_DECR_REF(inp);
3293                 }
3294         }
3295         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3296 }
3297
3298 /* release sctp_inpcb unbind the port */
3299 void
3300 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3301 {
3302         /*
3303          * Here we free a endpoint. We must find it (if it is in the Hash
3304          * table) and remove it from there. Then we must also find it in the
3305          * overall list and remove it from there. After all removals are
3306          * complete then any timer has to be stopped. Then start the actual
3307          * freeing. a) Any local lists. b) Any associations. c) The hash of
3308          * all associations. d) finally the ep itself.
3309          */
3310         struct sctp_tcb *asoc, *nasoc;
3311         struct sctp_laddr *laddr, *nladdr;
3312         struct inpcb *ip_pcb;
3313         struct socket *so;
3314         int being_refed = 0;
3315         struct sctp_queued_to_read *sq, *nsq;
3316         int cnt;
3317         sctp_sharedkey_t *shared_key, *nshared_key;
3318
3319
3320 #ifdef SCTP_LOG_CLOSING
3321         sctp_log_closing(inp, NULL, 0);
3322 #endif
3323         SCTP_ITERATOR_LOCK();
3324         /* mark any iterators on the list or being processed */
3325         sctp_iterator_inp_being_freed(inp);
3326         SCTP_ITERATOR_UNLOCK();
3327         so = inp->sctp_socket;
3328         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3329                 /* been here before.. eeks.. get out of here */
3330                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3331 #ifdef SCTP_LOG_CLOSING
3332                 sctp_log_closing(inp, NULL, 1);
3333 #endif
3334                 return;
3335         }
3336         SCTP_ASOC_CREATE_LOCK(inp);
3337         SCTP_INP_INFO_WLOCK();
3338
3339         SCTP_INP_WLOCK(inp);
3340         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3341                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3342                 /* socket is gone, so no more wakeups allowed */
3343                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3344                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3345                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3346
3347         }
3348         /* First time through we have the socket lock, after that no more. */
3349         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3350             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3351
3352         if (inp->control) {
3353                 sctp_m_freem(inp->control);
3354                 inp->control = NULL;
3355         }
3356         if (inp->pkt) {
3357                 sctp_m_freem(inp->pkt);
3358                 inp->pkt = NULL;
3359         }
3360         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3361                                          * here but I will be nice :> (i.e.
3362                                          * ip_pcb = ep;) */
3363         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3364                 int cnt_in_sd;
3365
3366                 cnt_in_sd = 0;
3367                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3368                         SCTP_TCB_LOCK(asoc);
3369                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3370                                 /* Skip guys being freed */
3371                                 cnt_in_sd++;
3372                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3373                                         /*
3374                                          * Special case - we did not start a
3375                                          * kill timer on the asoc due to it
3376                                          * was not closed. So go ahead and
3377                                          * start it now.
3378                                          */
3379                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3380                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3381                                 }
3382                                 SCTP_TCB_UNLOCK(asoc);
3383                                 continue;
3384                         }
3385                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3386                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3387                             (asoc->asoc.total_output_queue_size == 0)) {
3388                                 /*
3389                                  * If we have data in queue, we don't want
3390                                  * to just free since the app may have done,
3391                                  * send()/close or connect/send/close. And
3392                                  * it wants the data to get across first.
3393                                  */
3394                                 /* Just abandon things in the front states */
3395                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3396                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3397                                         cnt_in_sd++;
3398                                 }
3399                                 continue;
3400                         }
3401                         /* Disconnect the socket please */
3402                         asoc->sctp_socket = NULL;
3403                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3404                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3405                             (asoc->asoc.control_pdapi) ||
3406                             (asoc->asoc.size_on_all_streams > 0) ||
3407                             (so && (so->so_rcv.sb_cc > 0))) {
3408                                 /* Left with Data unread */
3409                                 struct mbuf *op_err;
3410
3411                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3412                                     0, M_DONTWAIT, 1, MT_DATA);
3413                                 if (op_err) {
3414                                         /* Fill in the user initiated abort */
3415                                         struct sctp_paramhdr *ph;
3416                                         uint32_t *ippp;
3417
3418                                         SCTP_BUF_LEN(op_err) =
3419                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
3420                                         ph = mtod(op_err,
3421                                             struct sctp_paramhdr *);
3422                                         ph->param_type = htons(
3423                                             SCTP_CAUSE_USER_INITIATED_ABT);
3424                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
3425                                         ippp = (uint32_t *) (ph + 1);
3426                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
3427                                 }
3428                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
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, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3437                                         cnt_in_sd++;
3438                                 }
3439                                 continue;
3440                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3441                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3442                                     (asoc->asoc.stream_queue_cnt == 0)
3443                             ) {
3444                                 if (asoc->asoc.locked_on_sending) {
3445                                         goto abort_anyway;
3446                                 }
3447                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3448                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3449                                         struct sctp_nets *netp;
3450
3451                                         if (asoc->asoc.alternate) {
3452                                                 netp = asoc->asoc.alternate;
3453                                         } else {
3454                                                 netp = asoc->asoc.primary_destination;
3455                                         }
3456                                         /*
3457                                          * there is nothing queued to send,
3458                                          * so I send shutdown
3459                                          */
3460                                         sctp_send_shutdown(asoc, netp);
3461                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3462                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3463                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3464                                         }
3465                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3466                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3467                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3468                                             netp);
3469                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3470                                             asoc->asoc.primary_destination);
3471                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3472                                 }
3473                         } else {
3474                                 /* mark into shutdown pending */
3475                                 struct sctp_stream_queue_pending *sp;
3476
3477                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3478                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3479                                     asoc->asoc.primary_destination);
3480                                 if (asoc->asoc.locked_on_sending) {
3481                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3482                                             sctp_streamhead);
3483                                         if (sp == NULL) {
3484                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3485                                                     asoc->asoc.locked_on_sending,
3486                                                     asoc->asoc.locked_on_sending->stream_no);
3487                                         } else {
3488                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3489                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3490                                         }
3491                                 }
3492                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3493                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3494                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3495                                         struct mbuf *op_err;
3496
3497                         abort_anyway:
3498                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3499                                             0, M_DONTWAIT, 1, MT_DATA);
3500                                         if (op_err) {
3501                                                 /*
3502                                                  * Fill in the user
3503                                                  * initiated abort
3504                                                  */
3505                                                 struct sctp_paramhdr *ph;
3506                                                 uint32_t *ippp;
3507
3508                                                 SCTP_BUF_LEN(op_err) =
3509                                                     (sizeof(struct sctp_paramhdr) +
3510                                                     sizeof(uint32_t));
3511                                                 ph = mtod(op_err,
3512                                                     struct sctp_paramhdr *);
3513                                                 ph->param_type = htons(
3514                                                     SCTP_CAUSE_USER_INITIATED_ABT);
3515                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3516                                                 ippp = (uint32_t *) (ph + 1);
3517                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
3518                                         }
3519                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3520                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3521                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3522                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3523                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3524                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3525                                         }
3526                                         if (sctp_free_assoc(inp, asoc,
3527                                             SCTP_PCBFREE_NOFORCE,
3528                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3529                                                 cnt_in_sd++;
3530                                         }
3531                                         continue;
3532                                 } else {
3533                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3534                                 }
3535                         }
3536                         cnt_in_sd++;
3537                         SCTP_TCB_UNLOCK(asoc);
3538                 }
3539                 /* now is there some left in our SHUTDOWN state? */
3540                 if (cnt_in_sd) {
3541 #ifdef SCTP_LOG_CLOSING
3542                         sctp_log_closing(inp, NULL, 2);
3543 #endif
3544                         inp->sctp_socket = NULL;
3545                         SCTP_INP_WUNLOCK(inp);
3546                         SCTP_ASOC_CREATE_UNLOCK(inp);
3547                         SCTP_INP_INFO_WUNLOCK();
3548                         return;
3549                 }
3550         }
3551         inp->sctp_socket = NULL;
3552         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3553             SCTP_PCB_FLAGS_UNBOUND) {
3554                 /*
3555                  * ok, this guy has been bound. It's port is somewhere in
3556                  * the SCTP_BASE_INFO(hash table). Remove it!
3557                  */
3558                 LIST_REMOVE(inp, sctp_hash);
3559                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3560         }
3561         /*
3562          * If there is a timer running to kill us, forget it, since it may
3563          * have a contest on the INP lock.. which would cause us to die ...
3564          */
3565         cnt = 0;
3566         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3567                 SCTP_TCB_LOCK(asoc);
3568                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3569                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3570                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3571                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3572                         }
3573                         cnt++;
3574                         SCTP_TCB_UNLOCK(asoc);
3575                         continue;
3576                 }
3577                 /* Free associations that are NOT killing us */
3578                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3579                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3580                         struct mbuf *op_err;
3581                         uint32_t *ippp;
3582
3583                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3584                             0, M_DONTWAIT, 1, MT_DATA);
3585                         if (op_err) {
3586                                 /* Fill in the user initiated abort */
3587                                 struct sctp_paramhdr *ph;
3588
3589                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
3590                                     sizeof(uint32_t));
3591                                 ph = mtod(op_err, struct sctp_paramhdr *);
3592                                 ph->param_type = htons(
3593                                     SCTP_CAUSE_USER_INITIATED_ABT);
3594                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3595                                 ippp = (uint32_t *) (ph + 1);
3596                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
3597
3598                         }
3599                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3600                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3601                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3602                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3603                         cnt++;
3604                         SCTP_TCB_UNLOCK(asoc);
3605                         continue;
3606                 }
3607                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3608                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3609                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3610                 }
3611                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3612                         cnt++;
3613                 }
3614         }
3615         if (cnt) {
3616                 /* Ok we have someone out there that will kill us */
3617                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3618 #ifdef SCTP_LOG_CLOSING
3619                 sctp_log_closing(inp, NULL, 3);
3620 #endif
3621                 SCTP_INP_WUNLOCK(inp);
3622                 SCTP_ASOC_CREATE_UNLOCK(inp);
3623                 SCTP_INP_INFO_WUNLOCK();
3624                 return;
3625         }
3626         if (SCTP_INP_LOCK_CONTENDED(inp))
3627                 being_refed++;
3628         if (SCTP_INP_READ_CONTENDED(inp))
3629                 being_refed++;
3630         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3631                 being_refed++;
3632
3633         if ((inp->refcount) ||
3634             (being_refed) ||
3635             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3636                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3637 #ifdef SCTP_LOG_CLOSING
3638                 sctp_log_closing(inp, NULL, 4);
3639 #endif
3640                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3641                 SCTP_INP_WUNLOCK(inp);
3642                 SCTP_ASOC_CREATE_UNLOCK(inp);
3643                 SCTP_INP_INFO_WUNLOCK();
3644                 return;
3645         }
3646         inp->sctp_ep.signature_change.type = 0;
3647         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3648         /*
3649          * Remove it from the list .. last thing we need a lock for.
3650          */
3651         LIST_REMOVE(inp, sctp_list);
3652         SCTP_INP_WUNLOCK(inp);
3653         SCTP_ASOC_CREATE_UNLOCK(inp);
3654         SCTP_INP_INFO_WUNLOCK();
3655         /*
3656          * Now we release all locks. Since this INP cannot be found anymore
3657          * except possibly by the kill timer that might be running. We call
3658          * the drain function here. It should hit the case were it sees the
3659          * ACTIVE flag cleared and exit out freeing us to proceed and
3660          * destroy everything.
3661          */
3662         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3663                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3664         } else {
3665                 /* Probably un-needed */
3666                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3667         }
3668
3669 #ifdef SCTP_LOG_CLOSING
3670         sctp_log_closing(inp, NULL, 5);
3671 #endif
3672
3673
3674         if ((inp->sctp_asocidhash) != NULL) {
3675                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3676                 inp->sctp_asocidhash = NULL;
3677         }
3678         /* sa_ignore FREED_MEMORY */
3679         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3680                 /* Its only abandoned if it had data left */
3681                 if (sq->length)
3682                         SCTP_STAT_INCR(sctps_left_abandon);
3683
3684                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3685                 sctp_free_remote_addr(sq->whoFrom);
3686                 if (so)
3687                         so->so_rcv.sb_cc -= sq->length;
3688                 if (sq->data) {
3689                         sctp_m_freem(sq->data);
3690                         sq->data = NULL;
3691                 }
3692                 /*
3693                  * no need to free the net count, since at this point all
3694                  * assoc's are gone.
3695                  */
3696                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3697                 SCTP_DECR_READQ_COUNT();
3698         }
3699         /* Now the sctp_pcb things */
3700         /*
3701          * free each asoc if it is not already closed/free. we can't use the
3702          * macro here since le_next will get freed as part of the
3703          * sctp_free_assoc() call.
3704          */
3705         if (so) {
3706 #ifdef IPSEC
3707                 ipsec_delete_pcbpolicy(ip_pcb);
3708 #endif                          /* IPSEC */
3709
3710                 /* Unlocks not needed since the socket is gone now */
3711         }
3712         if (ip_pcb->inp_options) {
3713                 (void)sctp_m_free(ip_pcb->inp_options);
3714                 ip_pcb->inp_options = 0;
3715         }
3716 #ifdef INET6
3717         if (ip_pcb->inp_vflag & INP_IPV6) {
3718                 struct in6pcb *in6p;
3719
3720                 in6p = (struct in6pcb *)inp;
3721                 ip6_freepcbopts(in6p->in6p_outputopts);
3722         }
3723 #endif                          /* INET6 */
3724         ip_pcb->inp_vflag = 0;
3725         /* free up authentication fields */
3726         if (inp->sctp_ep.local_auth_chunks != NULL)
3727                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3728         if (inp->sctp_ep.local_hmacs != NULL)
3729                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3730
3731         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3732                 LIST_REMOVE(shared_key, next);
3733                 sctp_free_sharedkey(shared_key);
3734                 /* sa_ignore FREED_MEMORY */
3735         }
3736
3737         /*
3738          * if we have an address list the following will free the list of
3739          * ifaddr's that are set into this ep. Again macro limitations here,
3740          * since the LIST_FOREACH could be a bad idea.
3741          */
3742         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3743                 sctp_remove_laddr(laddr);
3744         }
3745
3746 #ifdef SCTP_TRACK_FREED_ASOCS
3747         /* TEMP CODE */
3748         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3749                 LIST_REMOVE(asoc, sctp_tcblist);
3750                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3751                 SCTP_DECR_ASOC_COUNT();
3752         }
3753         /* *** END TEMP CODE *** */
3754 #endif
3755         /* Now lets see about freeing the EP hash table. */
3756         if (inp->sctp_tcbhash != NULL) {
3757                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3758                 inp->sctp_tcbhash = NULL;
3759         }
3760         /* Now we must put the ep memory back into the zone pool */
3761         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3762         SCTP_INP_LOCK_DESTROY(inp);
3763         SCTP_INP_READ_DESTROY(inp);
3764         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3765         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3766         SCTP_DECR_EP_COUNT();
3767 }
3768
3769
3770 struct sctp_nets *
3771 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3772 {
3773         struct sctp_nets *net;
3774
3775         /* locate the address */
3776         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3777                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3778                         return (net);
3779         }
3780         return (NULL);
3781 }
3782
3783
3784 int
3785 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3786 {
3787         struct sctp_ifa *sctp_ifa;
3788
3789         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3790         if (sctp_ifa) {
3791                 return (1);
3792         } else {
3793                 return (0);
3794         }
3795 }
3796
3797 /*
3798  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3799  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3800  * stats of stuff.
3801  */
3802 int
3803 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3804     struct sctp_nets **netp, int set_scope, int from)
3805 {
3806         /*
3807          * The following is redundant to the same lines in the
3808          * sctp_aloc_assoc() but is needed since others call the add address
3809          * function
3810          */
3811         struct sctp_nets *net, *netfirst;
3812         int addr_inscope;
3813
3814         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3815             from);
3816         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3817
3818         netfirst = sctp_findnet(stcb, newaddr);
3819         if (netfirst) {
3820                 /*
3821                  * Lie and return ok, we don't want to make the association
3822                  * go away for this behavior. It will happen in the TCP
3823                  * model in a connected socket. It does not reach the hash
3824                  * table until after the association is built so it can't be
3825                  * found. Mark as reachable, since the initial creation will
3826                  * have been cleared and the NOT_IN_ASSOC flag will have
3827                  * been added... and we don't want to end up removing it
3828                  * back out.
3829                  */
3830                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3831                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3832                             SCTP_ADDR_UNCONFIRMED);
3833                 } else {
3834                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3835                 }
3836
3837                 return (0);
3838         }
3839         addr_inscope = 1;
3840         switch (newaddr->sa_family) {
3841 #ifdef INET
3842         case AF_INET:
3843                 {
3844                         struct sockaddr_in *sin;
3845
3846                         sin = (struct sockaddr_in *)newaddr;
3847                         if (sin->sin_addr.s_addr == 0) {
3848                                 /* Invalid address */
3849                                 return (-1);
3850                         }
3851                         /* zero out the bzero area */
3852                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3853
3854                         /* assure len is set */
3855                         sin->sin_len = sizeof(struct sockaddr_in);
3856                         if (set_scope) {
3857 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3858                                 stcb->ipv4_local_scope = 1;
3859 #else
3860                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3861                                         stcb->asoc.ipv4_local_scope = 1;
3862                                 }
3863 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3864                         } else {
3865                                 /* Validate the address is in scope */
3866                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3867                                     (stcb->asoc.ipv4_local_scope == 0)) {
3868                                         addr_inscope = 0;
3869                                 }
3870                         }
3871                         break;
3872                 }
3873 #endif
3874 #ifdef INET6
3875         case AF_INET6:
3876                 {
3877                         struct sockaddr_in6 *sin6;
3878
3879                         sin6 = (struct sockaddr_in6 *)newaddr;
3880                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3881                                 /* Invalid address */
3882                                 return (-1);
3883                         }
3884                         /* assure len is set */
3885                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3886                         if (set_scope) {
3887                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3888                                         stcb->asoc.loopback_scope = 1;
3889                                         stcb->asoc.local_scope = 0;
3890                                         stcb->asoc.ipv4_local_scope = 1;
3891                                         stcb->asoc.site_scope = 1;
3892                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3893                                         /*
3894                                          * If the new destination is a
3895                                          * LINK_LOCAL we must have common
3896                                          * site scope. Don't set the local
3897                                          * scope since we may not share all
3898                                          * links, only loopback can do this.
3899                                          * Links on the local network would
3900                                          * also be on our private network
3901                                          * for v4 too.
3902                                          */
3903                                         stcb->asoc.ipv4_local_scope = 1;
3904                                         stcb->asoc.site_scope = 1;
3905                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3906                                         /*
3907                                          * If the new destination is
3908                                          * SITE_LOCAL then we must have site
3909                                          * scope in common.
3910                                          */
3911                                         stcb->asoc.site_scope = 1;
3912                                 }
3913                         } else {
3914                                 /* Validate the address is in scope */
3915                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3916                                     (stcb->asoc.loopback_scope == 0)) {
3917                                         addr_inscope = 0;
3918                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3919                                     (stcb->asoc.local_scope == 0)) {
3920                                         addr_inscope = 0;
3921                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3922                                     (stcb->asoc.site_scope == 0)) {
3923                                         addr_inscope = 0;
3924                                 }
3925                         }
3926                         break;
3927                 }
3928 #endif
3929         default:
3930                 /* not supported family type */
3931                 return (-1);
3932         }
3933         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3934         if (net == NULL) {
3935                 return (-1);
3936         }
3937         SCTP_INCR_RADDR_COUNT();
3938         bzero(net, sizeof(struct sctp_nets));
3939         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3940         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3941         switch (newaddr->sa_family) {
3942 #ifdef INET
3943         case AF_INET:
3944                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3945                 break;
3946 #endif
3947 #ifdef INET6
3948         case AF_INET6:
3949                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3950                 break;
3951 #endif
3952         default:
3953                 break;
3954         }
3955         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3956         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3957                 stcb->asoc.loopback_scope = 1;
3958                 stcb->asoc.ipv4_local_scope = 1;
3959                 stcb->asoc.local_scope = 0;
3960                 stcb->asoc.site_scope = 1;
3961                 addr_inscope = 1;
3962         }
3963         net->failure_threshold = stcb->asoc.def_net_failure;
3964         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3965         if (addr_inscope == 0) {
3966                 net->dest_state = (SCTP_ADDR_REACHABLE |
3967                     SCTP_ADDR_OUT_OF_SCOPE);
3968         } else {
3969                 if (from == SCTP_ADDR_IS_CONFIRMED)
3970                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3971                         net->dest_state = SCTP_ADDR_REACHABLE;
3972                 else
3973                         net->dest_state = SCTP_ADDR_REACHABLE |
3974                             SCTP_ADDR_UNCONFIRMED;
3975         }
3976         /*
3977          * We set this to 0, the timer code knows that this means its an
3978          * initial value
3979          */
3980         net->rto_needed = 1;
3981         net->RTO = 0;
3982         net->RTO_measured = 0;
3983         stcb->asoc.numnets++;
3984         net->ref_count = 1;
3985         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3986         net->port = stcb->asoc.port;
3987         net->dscp = stcb->asoc.default_dscp;
3988 #ifdef INET6
3989         net->flowlabel = stcb->asoc.default_flowlabel;
3990 #endif
3991         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3992                 net->dest_state |= SCTP_ADDR_NOHB;
3993         } else {
3994                 net->dest_state &= ~SCTP_ADDR_NOHB;
3995         }
3996         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3997                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3998         } else {
3999                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
4000         }
4001         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
4002         /* Init the timer structure */
4003         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
4004         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
4005         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
4006
4007         /* Now generate a route for this guy */
4008 #ifdef INET6
4009         /* KAME hack: embed scopeid */
4010         if (newaddr->sa_family == AF_INET6) {
4011                 struct sockaddr_in6 *sin6;
4012
4013                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4014                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
4015                 sin6->sin6_scope_id = 0;
4016         }
4017 #endif
4018         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
4019
4020         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
4021                 /* Get source address */
4022                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
4023                     stcb,
4024                     (sctp_route_t *) & net->ro,
4025                     net,
4026                     0,
4027                     stcb->asoc.vrf_id);
4028                 /* Now get the interface MTU */
4029                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
4030                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
4031                 }
4032                 if (net->mtu > 0) {
4033                         uint32_t rmtu;
4034
4035                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
4036                         if (rmtu == 0) {
4037                                 /*
4038                                  * Start things off to match mtu of
4039                                  * interface please.
4040                                  */
4041                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
4042                                     net->ro.ro_rt, net->mtu);
4043                         } else {
4044                                 /*
4045                                  * we take the route mtu over the interface,
4046                                  * since the route may be leading out the
4047                                  * loopback, or a different interface.
4048                                  */
4049                                 net->mtu = rmtu;
4050                         }
4051                 }
4052         }
4053         if (net->mtu == 0) {
4054                 switch (newaddr->sa_family) {
4055 #ifdef INET
4056                 case AF_INET:
4057                         net->mtu = SCTP_DEFAULT_MTU;
4058                         break;
4059 #endif
4060 #ifdef INET6
4061                 case AF_INET6:
4062                         net->mtu = 1280;
4063                         break;
4064 #endif
4065                 default:
4066                         break;
4067                 }
4068         }
4069         if (net->port) {
4070                 net->mtu -= (uint32_t) sizeof(struct udphdr);
4071         }
4072         if (from == SCTP_ALLOC_ASOC) {
4073                 stcb->asoc.smallest_mtu = net->mtu;
4074         }
4075         if (stcb->asoc.smallest_mtu > net->mtu) {
4076                 stcb->asoc.smallest_mtu = net->mtu;
4077         }
4078 #ifdef INET6
4079         if (newaddr->sa_family == AF_INET6) {
4080                 struct sockaddr_in6 *sin6;
4081
4082                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4083                 (void)sa6_recoverscope(sin6);
4084         }
4085 #endif
4086
4087         /* JRS - Use the congestion control given in the CC module */
4088         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4089                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4090
4091         /*
4092          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4093          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4094          */
4095         net->find_pseudo_cumack = 1;
4096         net->find_rtx_pseudo_cumack = 1;
4097         net->src_addr_selected = 0;
4098         /* Choose an initial flowid. */
4099         net->flowid = stcb->asoc.my_vtag ^
4100             ntohs(stcb->rport) ^
4101             ntohs(stcb->sctp_ep->sctp_lport);
4102 #ifdef INVARIANTS
4103         net->flowidset = 1;
4104 #endif
4105         if (netp) {
4106                 *netp = net;
4107         }
4108         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4109         if (net->ro.ro_rt == NULL) {
4110                 /* Since we have no route put it at the back */
4111                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4112         } else if (netfirst == NULL) {
4113                 /* We are the first one in the pool. */
4114                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4115         } else if (netfirst->ro.ro_rt == NULL) {
4116                 /*
4117                  * First one has NO route. Place this one ahead of the first
4118                  * one.
4119                  */
4120                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4121         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4122                 /*
4123                  * This one has a different interface than the one at the
4124                  * top of the list. Place it ahead.
4125                  */
4126                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4127         } else {
4128                 /*
4129                  * Ok we have the same interface as the first one. Move
4130                  * forward until we find either a) one with a NULL route...
4131                  * insert ahead of that b) one with a different ifp.. insert
4132                  * after that. c) end of the list.. insert at the tail.
4133                  */
4134                 struct sctp_nets *netlook;
4135
4136                 do {
4137                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4138                         if (netlook == NULL) {
4139                                 /* End of the list */
4140                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4141                                 break;
4142                         } else if (netlook->ro.ro_rt == NULL) {
4143                                 /* next one has NO route */
4144                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4145                                 break;
4146                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4147                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4148                                     net, sctp_next);
4149                                 break;
4150                         }
4151                         /* Shift forward */
4152                         netfirst = netlook;
4153                 } while (netlook != NULL);
4154         }
4155
4156         /* got to have a primary set */
4157         if (stcb->asoc.primary_destination == 0) {
4158                 stcb->asoc.primary_destination = net;
4159         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4160                     (net->ro.ro_rt) &&
4161             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4162                 /* No route to current primary adopt new primary */
4163                 stcb->asoc.primary_destination = net;
4164         }
4165         /* Validate primary is first */
4166         net = TAILQ_FIRST(&stcb->asoc.nets);
4167         if ((net != stcb->asoc.primary_destination) &&
4168             (stcb->asoc.primary_destination)) {
4169                 /*
4170                  * first one on the list is NOT the primary sctp_cmpaddr()
4171                  * is much more efficient if the primary is the first on the
4172                  * list, make it so.
4173                  */
4174                 TAILQ_REMOVE(&stcb->asoc.nets,
4175                     stcb->asoc.primary_destination, sctp_next);
4176                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4177                     stcb->asoc.primary_destination, sctp_next);
4178         }
4179         return (0);
4180 }
4181
4182
4183 static uint32_t
4184 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4185 {
4186         uint32_t id;
4187         struct sctpasochead *head;
4188         struct sctp_tcb *lstcb;
4189
4190         SCTP_INP_WLOCK(inp);
4191 try_again:
4192         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4193                 /* TSNH */
4194                 SCTP_INP_WUNLOCK(inp);
4195                 return (0);
4196         }
4197         /*
4198          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4199          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4200          */
4201         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4202                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4203         }
4204         id = inp->sctp_associd_counter;
4205         inp->sctp_associd_counter++;
4206         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4207         if (lstcb) {
4208                 goto try_again;
4209         }
4210         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4211         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4212         stcb->asoc.in_asocid_hash = 1;
4213         SCTP_INP_WUNLOCK(inp);
4214         return id;
4215 }
4216
4217 /*
4218  * allocate an association and add it to the endpoint. The caller must be
4219  * careful to add all additional addresses once they are know right away or
4220  * else the assoc will be may experience a blackout scenario.
4221  */
4222 struct sctp_tcb *
4223 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4224     int *error, uint32_t override_tag, uint32_t vrf_id,
4225     struct thread *p
4226 )
4227 {
4228         /* note the p argument is only valid in unbound sockets */
4229
4230         struct sctp_tcb *stcb;
4231         struct sctp_association *asoc;
4232         struct sctpasochead *head;
4233         uint16_t rport;
4234         int err;
4235
4236         /*
4237          * Assumption made here: Caller has done a
4238          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4239          * address does not exist already.
4240          */
4241         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4242                 /* Hit max assoc, sorry no more */
4243                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4244                 *error = ENOBUFS;
4245                 return (NULL);
4246         }
4247         if (firstaddr == NULL) {
4248                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4249                 *error = EINVAL;
4250                 return (NULL);
4251         }
4252         SCTP_INP_RLOCK(inp);
4253         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4254             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4255             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4256                 /*
4257                  * If its in the TCP pool, its NOT allowed to create an
4258                  * association. The parent listener needs to call
4259                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4260                  * off, or connected one does this.. its an error.
4261                  */
4262                 SCTP_INP_RUNLOCK(inp);
4263                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4264                 *error = EINVAL;
4265                 return (NULL);
4266         }
4267         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4268             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4269                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4270                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4271                         SCTP_INP_RUNLOCK(inp);
4272                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4273                         *error = EINVAL;
4274                         return (NULL);
4275                 }
4276         }
4277         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4278 #ifdef SCTP_DEBUG
4279         if (firstaddr) {
4280                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4281                 switch (firstaddr->sa_family) {
4282 #ifdef INET
4283                 case AF_INET:
4284                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4285                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4286                         break;
4287 #endif
4288 #ifdef INET6
4289                 case AF_INET6:
4290                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4291                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4292                         break;
4293 #endif
4294                 default:
4295                         break;
4296                 }
4297         } else {
4298                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4299         }
4300 #endif                          /* SCTP_DEBUG */
4301         switch (firstaddr->sa_family) {
4302 #ifdef INET
4303         case AF_INET:
4304                 {
4305                         struct sockaddr_in *sin;
4306
4307                         sin = (struct sockaddr_in *)firstaddr;
4308                         if ((ntohs(sin->sin_port) == 0) ||
4309                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4310                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4311                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4312                                 /* Invalid address */
4313                                 SCTP_INP_RUNLOCK(inp);
4314                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4315                                 *error = EINVAL;
4316                                 return (NULL);
4317                         }
4318                         rport = sin->sin_port;
4319                         break;
4320                 }
4321 #endif
4322 #ifdef INET6
4323         case AF_INET6:
4324                 {
4325                         struct sockaddr_in6 *sin6;
4326
4327                         sin6 = (struct sockaddr_in6 *)firstaddr;
4328                         if ((ntohs(sin6->sin6_port) == 0) ||
4329                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4330                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4331                                 /* Invalid address */
4332                                 SCTP_INP_RUNLOCK(inp);
4333                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4334                                 *error = EINVAL;
4335                                 return (NULL);
4336                         }
4337                         rport = sin6->sin6_port;
4338                         break;
4339                 }
4340 #endif
4341         default:
4342                 /* not supported family type */
4343                 SCTP_INP_RUNLOCK(inp);
4344                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4345                 *error = EINVAL;
4346                 return (NULL);
4347         }
4348         SCTP_INP_RUNLOCK(inp);
4349         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4350                 /*
4351                  * If you have not performed a bind, then we need to do the
4352                  * ephemeral bind for you.
4353                  */
4354                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4355                     (struct sockaddr *)NULL,
4356                     (struct sctp_ifa *)NULL,
4357                     p
4358                     ))) {
4359                         /* bind error, probably perm */
4360                         *error = err;
4361                         return (NULL);
4362                 }
4363         }
4364         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4365         if (stcb == NULL) {
4366                 /* out of memory? */
4367                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4368                 *error = ENOMEM;
4369                 return (NULL);
4370         }
4371         SCTP_INCR_ASOC_COUNT();
4372
4373         bzero(stcb, sizeof(*stcb));
4374         asoc = &stcb->asoc;
4375
4376         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4377         SCTP_TCB_LOCK_INIT(stcb);
4378         SCTP_TCB_SEND_LOCK_INIT(stcb);
4379         stcb->rport = rport;
4380         /* setup back pointer's */
4381         stcb->sctp_ep = inp;
4382         stcb->sctp_socket = inp->sctp_socket;
4383         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4384                 /* failed */
4385                 SCTP_TCB_LOCK_DESTROY(stcb);
4386                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4387                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4388                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4389                 SCTP_DECR_ASOC_COUNT();
4390                 *error = err;
4391                 return (NULL);
4392         }
4393         /* and the port */
4394         SCTP_INP_INFO_WLOCK();
4395         SCTP_INP_WLOCK(inp);
4396         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4397                 /* inpcb freed while alloc going on */
4398                 SCTP_TCB_LOCK_DESTROY(stcb);
4399                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4400                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4401                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4402                 SCTP_INP_WUNLOCK(inp);
4403                 SCTP_INP_INFO_WUNLOCK();
4404                 SCTP_DECR_ASOC_COUNT();
4405                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4406                 *error = EINVAL;
4407                 return (NULL);
4408         }
4409         SCTP_TCB_LOCK(stcb);
4410
4411         /* now that my_vtag is set, add it to the hash */
4412         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4413         /* put it in the bucket in the vtag hash of assoc's for the system */
4414         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4415         SCTP_INP_INFO_WUNLOCK();
4416
4417         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4418                 /* failure.. memory error? */
4419                 if (asoc->strmout) {
4420                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4421                         asoc->strmout = NULL;
4422                 }
4423                 if (asoc->mapping_array) {
4424                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4425                         asoc->mapping_array = NULL;
4426                 }
4427                 if (asoc->nr_mapping_array) {
4428                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4429                         asoc->nr_mapping_array = NULL;
4430                 }
4431                 SCTP_DECR_ASOC_COUNT();
4432                 SCTP_TCB_LOCK_DESTROY(stcb);
4433                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4434                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4435                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4436                 SCTP_INP_WUNLOCK(inp);
4437                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4438                 *error = ENOBUFS;
4439                 return (NULL);
4440         }
4441         /* Init all the timers */
4442         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4443         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4444         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4445         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4446         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4447         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4448         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4449
4450         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4451         /* now file the port under the hash as well */
4452         if (inp->sctp_tcbhash != NULL) {
4453                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4454                     inp->sctp_hashmark)];
4455                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4456         }
4457         SCTP_INP_WUNLOCK(inp);
4458         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
4459         return (stcb);
4460 }
4461
4462
4463 void
4464 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4465 {
4466         struct sctp_association *asoc;
4467
4468         asoc = &stcb->asoc;
4469         asoc->numnets--;
4470         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4471         if (net == asoc->primary_destination) {
4472                 /* Reset primary */
4473                 struct sctp_nets *lnet;
4474
4475                 lnet = TAILQ_FIRST(&asoc->nets);
4476                 /*
4477                  * Mobility adaptation Ideally, if deleted destination is
4478                  * the primary, it becomes a fast retransmission trigger by
4479                  * the subsequent SET PRIMARY. (by micchie)
4480                  */
4481                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4482                     SCTP_MOBILITY_BASE) ||
4483                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4484                     SCTP_MOBILITY_FASTHANDOFF)) {
4485                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4486                         if (asoc->deleted_primary != NULL) {
4487                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4488                                 goto out;
4489                         }
4490                         asoc->deleted_primary = net;
4491                         atomic_add_int(&net->ref_count, 1);
4492                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4493                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4494                         sctp_mobility_feature_on(stcb->sctp_ep,
4495                             SCTP_MOBILITY_PRIM_DELETED);
4496                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4497                             stcb->sctp_ep, stcb, NULL);
4498                 }
4499 out:
4500                 /* Try to find a confirmed primary */
4501                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4502         }
4503         if (net == asoc->last_data_chunk_from) {
4504                 /* Reset primary */
4505                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4506         }
4507         if (net == asoc->last_control_chunk_from) {
4508                 /* Clear net */
4509                 asoc->last_control_chunk_from = NULL;
4510         }
4511         if (net == stcb->asoc.alternate) {
4512                 sctp_free_remote_addr(stcb->asoc.alternate);
4513                 stcb->asoc.alternate = NULL;
4514         }
4515         sctp_free_remote_addr(net);
4516 }
4517
4518 /*
4519  * remove a remote endpoint address from an association, it will fail if the
4520  * address does not exist.
4521  */
4522 int
4523 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4524 {
4525         /*
4526          * Here we need to remove a remote address. This is quite simple, we
4527          * first find it in the list of address for the association
4528          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4529          * on that item. Note we do not allow it to be removed if there are
4530          * no other addresses.
4531          */
4532         struct sctp_association *asoc;
4533         struct sctp_nets *net, *nnet;
4534
4535         asoc = &stcb->asoc;
4536
4537         /* locate the address */
4538         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4539                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4540                         continue;
4541                 }
4542                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4543                     remaddr)) {
4544                         /* we found the guy */
4545                         if (asoc->numnets < 2) {
4546                                 /* Must have at LEAST two remote addresses */
4547                                 return (-1);
4548                         } else {
4549                                 sctp_remove_net(stcb, net);
4550                                 return (0);
4551                         }
4552                 }
4553         }
4554         /* not found. */
4555         return (-2);
4556 }
4557
4558 void
4559 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4560 {
4561         struct sctpvtaghead *chain;
4562         struct sctp_tagblock *twait_block;
4563         int found = 0;
4564         int i;
4565
4566         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4567         if (!LIST_EMPTY(chain)) {
4568                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4569                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4570                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4571                                     (twait_block->vtag_block[i].lport == lport) &&
4572                                     (twait_block->vtag_block[i].rport == rport)) {
4573                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4574                                         twait_block->vtag_block[i].v_tag = 0;
4575                                         twait_block->vtag_block[i].lport = 0;
4576                                         twait_block->vtag_block[i].rport = 0;
4577                                         found = 1;
4578                                         break;
4579                                 }
4580                         }
4581                         if (found)
4582                                 break;
4583                 }
4584         }
4585 }
4586
4587 int
4588 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4589 {
4590         struct sctpvtaghead *chain;
4591         struct sctp_tagblock *twait_block;
4592         int found = 0;
4593         int i;
4594
4595         SCTP_INP_INFO_WLOCK();
4596         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4597         if (!LIST_EMPTY(chain)) {
4598                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4599                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4600                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4601                                     (twait_block->vtag_block[i].lport == lport) &&
4602                                     (twait_block->vtag_block[i].rport == rport)) {
4603                                         found = 1;
4604                                         break;
4605                                 }
4606                         }
4607                         if (found)
4608                                 break;
4609                 }
4610         }
4611         SCTP_INP_INFO_WUNLOCK();
4612         return (found);
4613 }
4614
4615
4616 void
4617 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4618 {
4619         struct sctpvtaghead *chain;
4620         struct sctp_tagblock *twait_block;
4621         struct timeval now;
4622         int set, i;
4623
4624         if (time == 0) {
4625                 /* Its disabled */
4626                 return;
4627         }
4628         (void)SCTP_GETTIME_TIMEVAL(&now);
4629         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4630         set = 0;
4631         if (!LIST_EMPTY(chain)) {
4632                 /* Block(s) present, lets find space, and expire on the fly */
4633                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4634                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4635                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
4636                                     !set) {
4637                                         twait_block->vtag_block[i].tv_sec_at_expire =
4638                                             now.tv_sec + time;
4639                                         twait_block->vtag_block[i].v_tag = tag;
4640                                         twait_block->vtag_block[i].lport = lport;
4641                                         twait_block->vtag_block[i].rport = rport;
4642                                         set = 1;
4643                                 } else if ((twait_block->vtag_block[i].v_tag) &&
4644                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4645                                         /* Audit expires this guy */
4646                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4647                                         twait_block->vtag_block[i].v_tag = 0;
4648                                         twait_block->vtag_block[i].lport = 0;
4649                                         twait_block->vtag_block[i].rport = 0;
4650                                         if (set == 0) {
4651                                                 /* Reuse it for my new tag */
4652                                                 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4653                                                 twait_block->vtag_block[i].v_tag = tag;
4654                                                 twait_block->vtag_block[i].lport = lport;
4655                                                 twait_block->vtag_block[i].rport = rport;
4656                                                 set = 1;
4657                                         }
4658                                 }
4659                         }
4660                         if (set) {
4661                                 /*
4662                                  * We only do up to the block where we can
4663                                  * place our tag for audits
4664                                  */
4665                                 break;
4666                         }
4667                 }
4668         }
4669         /* Need to add a new block to chain */
4670         if (!set) {
4671                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4672                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4673                 if (twait_block == NULL) {
4674 #ifdef INVARIANTS
4675                         panic("Can not alloc tagblock");
4676 #endif
4677                         return;
4678                 }
4679                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4680                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4681                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4682                 twait_block->vtag_block[0].v_tag = tag;
4683                 twait_block->vtag_block[0].lport = lport;
4684                 twait_block->vtag_block[0].rport = rport;
4685         }
4686 }
4687
4688
4689
4690 /*-
4691  * Free the association after un-hashing the remote port. This
4692  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4693  * expect that the input to this function IS a locked TCB.
4694  * It will return 0, if it did NOT destroy the association (instead
4695  * it unlocks it. It will return NON-zero if it either destroyed the
4696  * association OR the association is already destroyed.
4697  */
4698 int
4699 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4700 {
4701         int i;
4702         struct sctp_association *asoc;
4703         struct sctp_nets *net, *nnet;
4704         struct sctp_laddr *laddr, *naddr;
4705         struct sctp_tmit_chunk *chk, *nchk;
4706         struct sctp_asconf_addr *aparam, *naparam;
4707         struct sctp_asconf_ack *aack, *naack;
4708         struct sctp_stream_reset_list *strrst, *nstrrst;
4709         struct sctp_queued_to_read *sq, *nsq;
4710         struct sctp_stream_queue_pending *sp, *nsp;
4711         sctp_sharedkey_t *shared_key, *nshared_key;
4712         struct socket *so;
4713
4714         /* first, lets purge the entry from the hash table. */
4715
4716 #ifdef SCTP_LOG_CLOSING
4717         sctp_log_closing(inp, stcb, 6);
4718 #endif
4719         if (stcb->asoc.state == 0) {
4720 #ifdef SCTP_LOG_CLOSING
4721                 sctp_log_closing(inp, NULL, 7);
4722 #endif
4723                 /* there is no asoc, really TSNH :-0 */
4724                 return (1);
4725         }
4726         if (stcb->asoc.alternate) {
4727                 sctp_free_remote_addr(stcb->asoc.alternate);
4728                 stcb->asoc.alternate = NULL;
4729         }
4730         /* TEMP CODE */
4731         if (stcb->freed_from_where == 0) {
4732                 /* Only record the first place free happened from */
4733                 stcb->freed_from_where = from_location;
4734         }
4735         /* TEMP CODE */
4736
4737         asoc = &stcb->asoc;
4738         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4739             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4740                 /* nothing around */
4741                 so = NULL;
4742         else
4743                 so = inp->sctp_socket;
4744
4745         /*
4746          * We used timer based freeing if a reader or writer is in the way.
4747          * So we first check if we are actually being called from a timer,
4748          * if so we abort early if a reader or writer is still in the way.
4749          */
4750         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4751             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4752                 /*
4753                  * is it the timer driving us? if so are the reader/writers
4754                  * gone?
4755                  */
4756                 if (stcb->asoc.refcnt) {
4757                         /* nope, reader or writer in the way */
4758                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4759                         /* no asoc destroyed */
4760                         SCTP_TCB_UNLOCK(stcb);
4761 #ifdef SCTP_LOG_CLOSING
4762                         sctp_log_closing(inp, stcb, 8);
4763 #endif
4764                         return (0);
4765                 }
4766         }
4767         /* now clean up any other timers */
4768         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4769         asoc->dack_timer.self = NULL;
4770         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4771         /*-
4772          * For stream reset we don't blast this unless
4773          * it is a str-reset timer, it might be the
4774          * free-asoc timer which we DON'T want to
4775          * disturb.
4776          */
4777         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4778                 asoc->strreset_timer.self = NULL;
4779         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4780         asoc->asconf_timer.self = NULL;
4781         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4782         asoc->autoclose_timer.self = NULL;
4783         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4784         asoc->shut_guard_timer.self = NULL;
4785         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4786         asoc->delayed_event_timer.self = NULL;
4787         /* Mobility adaptation */
4788         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4789         asoc->delete_prim_timer.self = NULL;
4790         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4791                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4792                 net->rxt_timer.self = NULL;
4793                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4794                 net->pmtu_timer.self = NULL;
4795                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4796                 net->hb_timer.self = NULL;
4797         }
4798         /* Now the read queue needs to be cleaned up (only once) */
4799         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4800                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4801                 SCTP_INP_READ_LOCK(inp);
4802                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4803                         if (sq->stcb == stcb) {
4804                                 sq->do_not_ref_stcb = 1;
4805                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4806                                 /*
4807                                  * If there is no end, there never will be
4808                                  * now.
4809                                  */
4810                                 if (sq->end_added == 0) {
4811                                         /* Held for PD-API clear that. */
4812                                         sq->pdapi_aborted = 1;
4813                                         sq->held_length = 0;
4814                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4815                                                 /*
4816                                                  * Need to add a PD-API
4817                                                  * aborted indication.
4818                                                  * Setting the control_pdapi
4819                                                  * assures that it will be
4820                                                  * added right after this
4821                                                  * msg.
4822                                                  */
4823                                                 uint32_t strseq;
4824
4825                                                 stcb->asoc.control_pdapi = sq;
4826                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4827                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4828                                                     stcb,
4829                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4830                                                     (void *)&strseq,
4831                                                     SCTP_SO_LOCKED);
4832                                                 stcb->asoc.control_pdapi = NULL;
4833                                         }
4834                                 }
4835                                 /* Add an end to wake them */
4836                                 sq->end_added = 1;
4837                         }
4838                 }
4839                 SCTP_INP_READ_UNLOCK(inp);
4840                 if (stcb->block_entry) {
4841                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4842                         stcb->block_entry->error = ECONNRESET;
4843                         stcb->block_entry = NULL;
4844                 }
4845         }
4846         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4847                 /*
4848                  * Someone holds a reference OR the socket is unaccepted
4849                  * yet.
4850                  */
4851                 if ((stcb->asoc.refcnt) ||
4852                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4853                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4854                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4855                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4856                 }
4857                 SCTP_TCB_UNLOCK(stcb);
4858                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4859                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4860                         /* nothing around */
4861                         so = NULL;
4862                 if (so) {
4863                         /* Wake any reader/writers */
4864                         sctp_sorwakeup(inp, so);
4865                         sctp_sowwakeup(inp, so);
4866                 }
4867 #ifdef SCTP_LOG_CLOSING
4868                 sctp_log_closing(inp, stcb, 9);
4869 #endif
4870                 /* no asoc destroyed */
4871                 return (0);
4872         }
4873 #ifdef SCTP_LOG_CLOSING
4874         sctp_log_closing(inp, stcb, 10);
4875 #endif
4876         /*
4877          * When I reach here, no others want to kill the assoc yet.. and I
4878          * own the lock. Now its possible an abort comes in when I do the
4879          * lock exchange below to grab all the locks to do the final take
4880          * out. to prevent this we increment the count, which will start a
4881          * timer and blow out above thus assuring us that we hold exclusive
4882          * killing of the asoc. Note that after getting back the TCB lock we
4883          * will go ahead and increment the counter back up and stop any
4884          * timer a passing stranger may have started :-S
4885          */
4886         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4887                 atomic_add_int(&stcb->asoc.refcnt, 1);
4888
4889                 SCTP_TCB_UNLOCK(stcb);
4890                 SCTP_INP_INFO_WLOCK();
4891                 SCTP_INP_WLOCK(inp);
4892                 SCTP_TCB_LOCK(stcb);
4893         }
4894         /* Double check the GONE flag */
4895         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4896             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4897                 /* nothing around */
4898                 so = NULL;
4899
4900         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4901             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4902                 /*
4903                  * For TCP type we need special handling when we are
4904                  * connected. We also include the peel'ed off ones to.
4905                  */
4906                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4907                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4908                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4909                         if (so) {
4910                                 SOCK_LOCK(so);
4911                                 if (so->so_rcv.sb_cc == 0) {
4912                                         so->so_state &= ~(SS_ISCONNECTING |
4913                                             SS_ISDISCONNECTING |
4914                                             SS_ISCONFIRMING |
4915                                             SS_ISCONNECTED);
4916                                 }
4917                                 socantrcvmore_locked(so);
4918                                 sctp_sowwakeup(inp, so);
4919                                 sctp_sorwakeup(inp, so);
4920                                 SCTP_SOWAKEUP(so);
4921                         }
4922                 }
4923         }
4924         /*
4925          * Make it invalid too, that way if its about to run it will abort
4926          * and return.
4927          */
4928         /* re-increment the lock */
4929         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4930                 atomic_add_int(&stcb->asoc.refcnt, -1);
4931         }
4932         if (stcb->asoc.refcnt) {
4933                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4934                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4935                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4936                         SCTP_INP_INFO_WUNLOCK();
4937                         SCTP_INP_WUNLOCK(inp);
4938                 }
4939                 SCTP_TCB_UNLOCK(stcb);
4940                 return (0);
4941         }
4942         asoc->state = 0;
4943         if (inp->sctp_tcbhash) {
4944                 LIST_REMOVE(stcb, sctp_tcbhash);
4945         }
4946         if (stcb->asoc.in_asocid_hash) {
4947                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4948         }
4949         /* Now lets remove it from the list of ALL associations in the EP */
4950         LIST_REMOVE(stcb, sctp_tcblist);
4951         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4952                 SCTP_INP_INCR_REF(inp);
4953                 SCTP_INP_WUNLOCK(inp);
4954         }
4955         /* pull from vtag hash */
4956         LIST_REMOVE(stcb, sctp_asocs);
4957         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4958             inp->sctp_lport, stcb->rport);
4959
4960         /*
4961          * Now restop the timers to be sure this is paranoia at is finest!
4962          */
4963         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4964         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4965         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4966         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4967         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4968         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4969         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4970         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4971                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4972                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4973                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4974         }
4975
4976         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4977         /*
4978          * The chunk lists and such SHOULD be empty but we check them just
4979          * in case.
4980          */
4981         /* anything on the wheel needs to be removed */
4982         for (i = 0; i < asoc->streamoutcnt; i++) {
4983                 struct sctp_stream_out *outs;
4984
4985                 outs = &asoc->strmout[i];
4986                 /* now clean up any chunks here */
4987                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4988                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4989                         if (sp->data) {
4990                                 if (so) {
4991                                         /* Still an open socket - report */
4992                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4993                                             SCTP_NOTIFY_DATAGRAM_UNSENT,
4994                                             (void *)sp, SCTP_SO_LOCKED);
4995                                 }
4996                                 if (sp->data) {
4997                                         sctp_m_freem(sp->data);
4998                                         sp->data = NULL;
4999                                         sp->tail_mbuf = NULL;
5000                                 }
5001                         }
5002                         if (sp->net) {
5003                                 sctp_free_remote_addr(sp->net);
5004                                 sp->net = NULL;
5005                         }
5006                         sctp_free_spbufspace(stcb, asoc, sp);
5007                         if (sp->holds_key_ref)
5008                                 sctp_auth_key_release(stcb, sp->auth_keyid, SCTP_SO_LOCKED);
5009                         /* Free the zone stuff  */
5010                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp);
5011                         SCTP_DECR_STRMOQ_COUNT();
5012                         /* sa_ignore FREED_MEMORY */
5013                 }
5014         }
5015         /* sa_ignore FREED_MEMORY */
5016         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
5017                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
5018                 SCTP_FREE(strrst, SCTP_M_STRESET);
5019         }
5020         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
5021                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
5022                 if (sq->data) {
5023                         sctp_m_freem(sq->data);
5024                         sq->data = NULL;
5025                 }
5026                 sctp_free_remote_addr(sq->whoFrom);
5027                 sq->whoFrom = NULL;
5028                 sq->stcb = NULL;
5029                 /* Free the ctl entry */
5030                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
5031                 SCTP_DECR_READQ_COUNT();
5032                 /* sa_ignore FREED_MEMORY */
5033         }
5034         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
5035                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
5036                 if (chk->data) {
5037                         sctp_m_freem(chk->data);
5038                         chk->data = NULL;
5039                 }
5040                 if (chk->holds_key_ref)
5041                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5042                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5043                 SCTP_DECR_CHK_COUNT();
5044                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
5045                 asoc->free_chunk_cnt--;
5046                 /* sa_ignore FREED_MEMORY */
5047         }
5048         /* pending send queue SHOULD be empty */
5049         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5050                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5051                 if (chk->data) {
5052                         if (so) {
5053                                 /* Still a socket? */
5054                                 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb,
5055                                     SCTP_NOTIFY_DATAGRAM_UNSENT, chk, SCTP_SO_LOCKED);
5056                         }
5057                         if (chk->data) {
5058                                 sctp_m_freem(chk->data);
5059                                 chk->data = NULL;
5060                         }
5061                 }
5062                 if (chk->holds_key_ref)
5063                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5064                 if (chk->whoTo) {
5065                         sctp_free_remote_addr(chk->whoTo);
5066                         chk->whoTo = NULL;
5067                 }
5068                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5069                 SCTP_DECR_CHK_COUNT();
5070                 /* sa_ignore FREED_MEMORY */
5071         }
5072         /* sent queue SHOULD be empty */
5073         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5074                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5075                 if (chk->data) {
5076                         if (so) {
5077                                 /* Still a socket? */
5078                                 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb,
5079                                     SCTP_NOTIFY_DATAGRAM_SENT, chk, SCTP_SO_LOCKED);
5080                         }
5081                         if (chk->data) {
5082                                 sctp_m_freem(chk->data);
5083                                 chk->data = NULL;
5084                         }
5085                 }
5086                 if (chk->holds_key_ref)
5087                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5088                 sctp_free_remote_addr(chk->whoTo);
5089                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5090                 SCTP_DECR_CHK_COUNT();
5091                 /* sa_ignore FREED_MEMORY */
5092         }
5093         /* control queue MAY not be empty */
5094         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5095                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5096                 if (chk->data) {
5097                         sctp_m_freem(chk->data);
5098                         chk->data = NULL;
5099                 }
5100                 if (chk->holds_key_ref)
5101                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5102                 sctp_free_remote_addr(chk->whoTo);
5103                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5104                 SCTP_DECR_CHK_COUNT();
5105                 /* sa_ignore FREED_MEMORY */
5106         }
5107         /* ASCONF queue MAY not be empty */
5108         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5109                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5110                 if (chk->data) {
5111                         sctp_m_freem(chk->data);
5112                         chk->data = NULL;
5113                 }
5114                 if (chk->holds_key_ref)
5115                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5116                 sctp_free_remote_addr(chk->whoTo);
5117                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5118                 SCTP_DECR_CHK_COUNT();
5119                 /* sa_ignore FREED_MEMORY */
5120         }
5121         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5122                 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5123                 if (chk->data) {
5124                         sctp_m_freem(chk->data);
5125                         chk->data = NULL;
5126                 }
5127                 if (chk->holds_key_ref)
5128                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5129                 sctp_free_remote_addr(chk->whoTo);
5130                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5131                 SCTP_DECR_CHK_COUNT();
5132                 /* sa_ignore FREED_MEMORY */
5133         }
5134
5135         if (asoc->mapping_array) {
5136                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5137                 asoc->mapping_array = NULL;
5138         }
5139         if (asoc->nr_mapping_array) {
5140                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5141                 asoc->nr_mapping_array = NULL;
5142         }
5143         /* the stream outs */
5144         if (asoc->strmout) {
5145                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5146                 asoc->strmout = NULL;
5147         }
5148         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5149         if (asoc->strmin) {
5150                 struct sctp_queued_to_read *ctl, *nctl;
5151
5152                 for (i = 0; i < asoc->streamincnt; i++) {
5153                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5154                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5155                                 sctp_free_remote_addr(ctl->whoFrom);
5156                                 if (ctl->data) {
5157                                         sctp_m_freem(ctl->data);
5158                                         ctl->data = NULL;
5159                                 }
5160                                 /*
5161                                  * We don't free the address here since all
5162                                  * the net's were freed above.
5163                                  */
5164                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5165                                 SCTP_DECR_READQ_COUNT();
5166                         }
5167                 }
5168                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5169                 asoc->strmin = NULL;
5170         }
5171         asoc->streamincnt = 0;
5172         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5173 #ifdef INVARIANTS
5174                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5175                         panic("no net's left alloc'ed, or list points to itself");
5176                 }
5177 #endif
5178                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5179                 sctp_free_remote_addr(net);
5180         }
5181         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5182                 /* sa_ignore FREED_MEMORY */
5183                 sctp_remove_laddr(laddr);
5184         }
5185
5186         /* pending asconf (address) parameters */
5187         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5188                 /* sa_ignore FREED_MEMORY */
5189                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5190                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5191         }
5192         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5193                 /* sa_ignore FREED_MEMORY */
5194                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5195                 if (aack->data != NULL) {
5196                         sctp_m_freem(aack->data);
5197                 }
5198                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5199         }
5200         /* clean up auth stuff */
5201         if (asoc->local_hmacs)
5202                 sctp_free_hmaclist(asoc->local_hmacs);
5203         if (asoc->peer_hmacs)
5204                 sctp_free_hmaclist(asoc->peer_hmacs);
5205
5206         if (asoc->local_auth_chunks)
5207                 sctp_free_chunklist(asoc->local_auth_chunks);
5208         if (asoc->peer_auth_chunks)
5209                 sctp_free_chunklist(asoc->peer_auth_chunks);
5210
5211         sctp_free_authinfo(&asoc->authinfo);
5212
5213         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5214                 LIST_REMOVE(shared_key, next);
5215                 sctp_free_sharedkey(shared_key);
5216                 /* sa_ignore FREED_MEMORY */
5217         }
5218
5219         /* Insert new items here :> */
5220
5221         /* Get rid of LOCK */
5222         SCTP_TCB_LOCK_DESTROY(stcb);
5223         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5224         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5225                 SCTP_INP_INFO_WUNLOCK();
5226                 SCTP_INP_RLOCK(inp);
5227         }
5228 #ifdef SCTP_TRACK_FREED_ASOCS
5229         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5230                 /* now clean up the tasoc itself */
5231                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5232                 SCTP_DECR_ASOC_COUNT();
5233         } else {
5234                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5235         }
5236 #else
5237         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5238         SCTP_DECR_ASOC_COUNT();
5239 #endif
5240         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5241                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5242                         /*
5243                          * If its NOT the inp_free calling us AND sctp_close
5244                          * as been called, we call back...
5245                          */
5246                         SCTP_INP_RUNLOCK(inp);
5247                         /*
5248                          * This will start the kill timer (if we are the
5249                          * last one) since we hold an increment yet. But
5250                          * this is the only safe way to do this since
5251                          * otherwise if the socket closes at the same time
5252                          * we are here we might collide in the cleanup.
5253                          */
5254                         sctp_inpcb_free(inp,
5255                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5256                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5257                         SCTP_INP_DECR_REF(inp);
5258                         goto out_of;
5259                 } else {
5260                         /* The socket is still open. */
5261                         SCTP_INP_DECR_REF(inp);
5262                 }
5263         }
5264         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5265                 SCTP_INP_RUNLOCK(inp);
5266         }
5267 out_of:
5268         /* destroyed the asoc */
5269 #ifdef SCTP_LOG_CLOSING
5270         sctp_log_closing(inp, NULL, 11);
5271 #endif
5272         return (1);
5273 }
5274
5275
5276
5277 /*
5278  * determine if a destination is "reachable" based upon the addresses bound
5279  * to the current endpoint (e.g. only v4 or v6 currently bound)
5280  */
5281 /*
5282  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5283  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5284  * types bound as its endpoint
5285  */
5286 int
5287 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5288 {
5289         struct sctp_inpcb *inp;
5290         int answer;
5291
5292         /*
5293          * No locks here, the TCB, in all cases is already locked and an
5294          * assoc is up. There is either a INP lock by the caller applied (in
5295          * asconf case when deleting an address) or NOT in the HB case,
5296          * however if HB then the INP increment is up and the INP will not
5297          * be removed (on top of the fact that we have a TCB lock). So we
5298          * only want to read the sctp_flags, which is either bound-all or
5299          * not.. no protection needed since once an assoc is up you can't be
5300          * changing your binding.
5301          */
5302         inp = stcb->sctp_ep;
5303         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5304                 /* if bound all, destination is not restricted */
5305                 /*
5306                  * RRS: Question during lock work: Is this correct? If you
5307                  * are bound-all you still might need to obey the V4--V6
5308                  * flags??? IMO this bound-all stuff needs to be removed!
5309                  */
5310                 return (1);
5311         }
5312         /* NOTE: all "scope" checks are done when local addresses are added */
5313         switch (destaddr->sa_family) {
5314         case AF_INET6:
5315                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5316                 break;
5317         case AF_INET:
5318                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5319                 break;
5320         default:
5321                 /* invalid family, so it's unreachable */
5322                 answer = 0;
5323                 break;
5324         }
5325         return (answer);
5326 }
5327
5328 /*
5329  * update the inp_vflags on an endpoint
5330  */
5331 static void
5332 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5333 {
5334         struct sctp_laddr *laddr;
5335
5336         /* first clear the flag */
5337         inp->ip_inp.inp.inp_vflag = 0;
5338         /* set the flag based on addresses on the ep list */
5339         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5340                 if (laddr->ifa == NULL) {
5341                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5342                             __FUNCTION__);
5343                         continue;
5344                 }
5345                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5346                         continue;
5347                 }
5348                 switch (laddr->ifa->address.sa.sa_family) {
5349 #ifdef INET6
5350                 case AF_INET6:
5351                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5352                         break;
5353 #endif
5354 #ifdef INET
5355                 case AF_INET:
5356                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5357                         break;
5358 #endif
5359                 default:
5360                         break;
5361                 }
5362         }
5363 }
5364
5365 /*
5366  * Add the address to the endpoint local address list There is nothing to be
5367  * done if we are bound to all addresses
5368  */
5369 void
5370 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5371 {
5372         struct sctp_laddr *laddr;
5373         int fnd, error = 0;
5374
5375         fnd = 0;
5376
5377         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5378                 /* You are already bound to all. You have it already */
5379                 return;
5380         }
5381 #ifdef INET6
5382         if (ifa->address.sa.sa_family == AF_INET6) {
5383                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5384                         /* Can't bind a non-useable addr. */
5385                         return;
5386                 }
5387         }
5388 #endif
5389         /* first, is it already present? */
5390         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5391                 if (laddr->ifa == ifa) {
5392                         fnd = 1;
5393                         break;
5394                 }
5395         }
5396
5397         if (fnd == 0) {
5398                 /* Not in the ep list */
5399                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5400                 if (error != 0)
5401                         return;
5402                 inp->laddr_count++;
5403                 /* update inp_vflag flags */
5404                 switch (ifa->address.sa.sa_family) {
5405 #ifdef INET6
5406                 case AF_INET6:
5407                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5408                         break;
5409 #endif
5410 #ifdef INET6
5411                 case AF_INET:
5412                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5413                         break;
5414 #endif
5415                 default:
5416                         break;
5417                 }
5418         }
5419         return;
5420 }
5421
5422
5423 /*
5424  * select a new (hopefully reachable) destination net (should only be used
5425  * when we deleted an ep addr that is the only usable source address to reach
5426  * the destination net)
5427  */
5428 static void
5429 sctp_select_primary_destination(struct sctp_tcb *stcb)
5430 {
5431         struct sctp_nets *net;
5432
5433         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5434                 /* for now, we'll just pick the first reachable one we find */
5435                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5436                         continue;
5437                 if (sctp_destination_is_reachable(stcb,
5438                     (struct sockaddr *)&net->ro._l_addr)) {
5439                         /* found a reachable destination */
5440                         stcb->asoc.primary_destination = net;
5441                 }
5442         }
5443         /* I can't there from here! ...we're gonna die shortly... */
5444 }
5445
5446
5447 /*
5448  * Delete the address from the endpoint local address list There is nothing
5449  * to be done if we are bound to all addresses
5450  */
5451 void
5452 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5453 {
5454         struct sctp_laddr *laddr;
5455         int fnd;
5456
5457         fnd = 0;
5458         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5459                 /* You are already bound to all. You have it already */
5460                 return;
5461         }
5462         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5463                 if (laddr->ifa == ifa) {
5464                         fnd = 1;
5465                         break;
5466                 }
5467         }
5468         if (fnd && (inp->laddr_count < 2)) {
5469                 /* can't delete unless there are at LEAST 2 addresses */
5470                 return;
5471         }
5472         if (fnd) {
5473                 /*
5474                  * clean up any use of this address go through our
5475                  * associations and clear any last_used_address that match
5476                  * this one for each assoc, see if a new primary_destination
5477                  * is needed
5478                  */
5479                 struct sctp_tcb *stcb;
5480
5481                 /* clean up "next_addr_touse" */
5482                 if (inp->next_addr_touse == laddr)
5483                         /* delete this address */
5484                         inp->next_addr_touse = NULL;
5485
5486                 /* clean up "last_used_address" */
5487                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5488                         struct sctp_nets *net;
5489
5490                         SCTP_TCB_LOCK(stcb);
5491                         if (stcb->asoc.last_used_address == laddr)
5492                                 /* delete this address */
5493                                 stcb->asoc.last_used_address = NULL;
5494                         /*
5495                          * Now spin through all the nets and purge any ref
5496                          * to laddr
5497                          */
5498                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5499                                 if (net->ro._s_addr &&
5500                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5501                                         /* Yep, purge src address selected */
5502                                         sctp_rtentry_t *rt;
5503
5504                                         /* delete this address if cached */
5505                                         rt = net->ro.ro_rt;
5506                                         if (rt != NULL) {
5507                                                 RTFREE(rt);
5508                                                 net->ro.ro_rt = NULL;
5509                                         }
5510                                         sctp_free_ifa(net->ro._s_addr);
5511                                         net->ro._s_addr = NULL;
5512                                         net->src_addr_selected = 0;
5513                                 }
5514                         }
5515                         SCTP_TCB_UNLOCK(stcb);
5516                 }               /* for each tcb */
5517                 /* remove it from the ep list */
5518                 sctp_remove_laddr(laddr);
5519                 inp->laddr_count--;
5520                 /* update inp_vflag flags */
5521                 sctp_update_ep_vflag(inp);
5522         }
5523         return;
5524 }
5525
5526 /*
5527  * Add the address to the TCB local address restricted list.
5528  * This is a "pending" address list (eg. addresses waiting for an
5529  * ASCONF-ACK response) and cannot be used as a valid source address.
5530  */
5531 void
5532 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5533 {
5534         struct sctp_laddr *laddr;
5535         struct sctpladdr *list;
5536
5537         /*
5538          * Assumes TCB is locked.. and possibly the INP. May need to
5539          * confirm/fix that if we need it and is not the case.
5540          */
5541         list = &stcb->asoc.sctp_restricted_addrs;
5542
5543 #ifdef INET6
5544         if (ifa->address.sa.sa_family == AF_INET6) {
5545                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5546                         /* Can't bind a non-existent addr. */
5547                         return;
5548                 }
5549         }
5550 #endif
5551         /* does the address already exist? */
5552         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5553                 if (laddr->ifa == ifa) {
5554                         return;
5555                 }
5556         }
5557
5558         /* add to the list */
5559         (void)sctp_insert_laddr(list, ifa, 0);
5560         return;
5561 }
5562
5563 /*
5564  * insert an laddr entry with the given ifa for the desired list
5565  */
5566 int
5567 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5568 {
5569         struct sctp_laddr *laddr;
5570
5571         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5572         if (laddr == NULL) {
5573                 /* out of memory? */
5574                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5575                 return (EINVAL);
5576         }
5577         SCTP_INCR_LADDR_COUNT();
5578         bzero(laddr, sizeof(*laddr));
5579         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5580         laddr->ifa = ifa;
5581         laddr->action = act;
5582         atomic_add_int(&ifa->refcount, 1);
5583         /* insert it */
5584         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5585
5586         return (0);
5587 }
5588
5589 /*
5590  * Remove an laddr entry from the local address list (on an assoc)
5591  */
5592 void
5593 sctp_remove_laddr(struct sctp_laddr *laddr)
5594 {
5595
5596         /* remove from the list */
5597         LIST_REMOVE(laddr, sctp_nxt_addr);
5598         sctp_free_ifa(laddr->ifa);
5599         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5600         SCTP_DECR_LADDR_COUNT();
5601 }
5602
5603 /*
5604  * Remove a local address from the TCB local address restricted list
5605  */
5606 void
5607 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5608 {
5609         struct sctp_inpcb *inp;
5610         struct sctp_laddr *laddr;
5611
5612         /*
5613          * This is called by asconf work. It is assumed that a) The TCB is
5614          * locked and b) The INP is locked. This is true in as much as I can
5615          * trace through the entry asconf code where I did these locks.
5616          * Again, the ASCONF code is a bit different in that it does lock
5617          * the INP during its work often times. This must be since we don't
5618          * want other proc's looking up things while what they are looking
5619          * up is changing :-D
5620          */
5621
5622         inp = stcb->sctp_ep;
5623         /* if subset bound and don't allow ASCONF's, can't delete last */
5624         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5625             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5626                 if (stcb->sctp_ep->laddr_count < 2) {
5627                         /* can't delete last address */
5628                         return;
5629                 }
5630         }
5631         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5632                 /* remove the address if it exists */
5633                 if (laddr->ifa == NULL)
5634                         continue;
5635                 if (laddr->ifa == ifa) {
5636                         sctp_remove_laddr(laddr);
5637                         return;
5638                 }
5639         }
5640
5641         /* address not found! */
5642         return;
5643 }
5644
5645 /*
5646  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5647  */
5648 /* sysctl */
5649 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5650 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5651
5652
5653
5654 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5655 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5656 int *sctp_cpuarry = NULL;
5657 void
5658 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5659 {
5660         /* Queue a packet to a processor for the specified core */
5661         struct sctp_mcore_queue *qent;
5662         struct sctp_mcore_ctrl *wkq;
5663         int need_wake = 0;
5664
5665         if (sctp_mcore_workers == NULL) {
5666                 /* Something went way bad during setup */
5667                 sctp_input_with_port(m, off, 0);
5668                 return;
5669         }
5670         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5671             (sizeof(struct sctp_mcore_queue)),
5672             SCTP_M_MCORE);
5673         if (qent == NULL) {
5674                 /* This is trouble  */
5675                 sctp_input_with_port(m, off, 0);
5676                 return;
5677         }
5678         qent->vn = curvnet;
5679         qent->m = m;
5680         qent->off = off;
5681         qent->v6 = 0;
5682         wkq = &sctp_mcore_workers[cpu_to_use];
5683         SCTP_MCORE_QLOCK(wkq);
5684
5685         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5686         if (wkq->running == 0) {
5687                 need_wake = 1;
5688         }
5689         SCTP_MCORE_QUNLOCK(wkq);
5690         if (need_wake) {
5691                 wakeup(&wkq->running);
5692         }
5693 }
5694
5695 static void
5696 sctp_mcore_thread(void *arg)
5697 {
5698
5699         struct sctp_mcore_ctrl *wkq;
5700         struct sctp_mcore_queue *qent;
5701
5702         wkq = (struct sctp_mcore_ctrl *)arg;
5703         struct mbuf *m;
5704         int off, v6;
5705
5706         /* Wait for first tickle */
5707         SCTP_MCORE_LOCK(wkq);
5708         wkq->running = 0;
5709         msleep(&wkq->running,
5710             &wkq->core_mtx,
5711             0, "wait for pkt", 0);
5712         SCTP_MCORE_UNLOCK(wkq);
5713
5714         /* Bind to our cpu */
5715         thread_lock(curthread);
5716         sched_bind(curthread, wkq->cpuid);
5717         thread_unlock(curthread);
5718
5719         /* Now lets start working */
5720         SCTP_MCORE_LOCK(wkq);
5721         /* Now grab lock and go */
5722         for (;;) {
5723                 SCTP_MCORE_QLOCK(wkq);
5724 skip_sleep:
5725                 wkq->running = 1;
5726                 qent = TAILQ_FIRST(&wkq->que);
5727                 if (qent) {
5728                         TAILQ_REMOVE(&wkq->que, qent, next);
5729                         SCTP_MCORE_QUNLOCK(wkq);
5730                         CURVNET_SET(qent->vn);
5731                         m = qent->m;
5732                         off = qent->off;
5733                         v6 = qent->v6;
5734                         SCTP_FREE(qent, SCTP_M_MCORE);
5735                         if (v6 == 0) {
5736                                 sctp_input_with_port(m, off, 0);
5737                         } else {
5738                                 SCTP_PRINTF("V6 not yet supported\n");
5739                                 sctp_m_freem(m);
5740                         }
5741                         CURVNET_RESTORE();
5742                         SCTP_MCORE_QLOCK(wkq);
5743                 }
5744                 wkq->running = 0;
5745                 if (!TAILQ_EMPTY(&wkq->que)) {
5746                         goto skip_sleep;
5747                 }
5748                 SCTP_MCORE_QUNLOCK(wkq);
5749                 msleep(&wkq->running,
5750                     &wkq->core_mtx,
5751                     0, "wait for pkt", 0);
5752         }
5753 }
5754
5755 static void
5756 sctp_startup_mcore_threads(void)
5757 {
5758         int i, cpu;
5759
5760         if (mp_ncpus == 1)
5761                 return;
5762
5763         if (sctp_mcore_workers != NULL) {
5764                 /*
5765                  * Already been here in some previous vnet?
5766                  */
5767                 return;
5768         }
5769         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5770             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5771             SCTP_M_MCORE);
5772         if (sctp_mcore_workers == NULL) {
5773                 /* TSNH I hope */
5774                 return;
5775         }
5776         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5777             sizeof(struct sctp_mcore_ctrl)));
5778         /* Init the structures */
5779         for (i = 0; i <= mp_maxid; i++) {
5780                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5781                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5782                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5783                 sctp_mcore_workers[i].cpuid = i;
5784         }
5785         if (sctp_cpuarry == NULL) {
5786                 SCTP_MALLOC(sctp_cpuarry, int *,
5787                     (mp_ncpus * sizeof(int)),
5788                     SCTP_M_MCORE);
5789                 i = 0;
5790                 CPU_FOREACH(cpu) {
5791                         sctp_cpuarry[i] = cpu;
5792                         i++;
5793                 }
5794         }
5795         /* Now start them all */
5796         CPU_FOREACH(cpu) {
5797                 (void)kproc_create(sctp_mcore_thread,
5798                     (void *)&sctp_mcore_workers[cpu],
5799                     &sctp_mcore_workers[cpu].thread_proc,
5800                     RFPROC,
5801                     SCTP_KTHREAD_PAGES,
5802                     SCTP_MCORE_NAME);
5803
5804         }
5805 }
5806
5807 #endif
5808
5809 void
5810 sctp_pcb_init()
5811 {
5812         /*
5813          * SCTP initialization for the PCB structures should be called by
5814          * the sctp_init() funciton.
5815          */
5816         int i;
5817         struct timeval tv;
5818
5819         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5820                 /* error I was called twice */
5821                 return;
5822         }
5823         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5824
5825 #if defined(SCTP_LOCAL_TRACE_BUF)
5826         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5827 #endif
5828 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5829         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5830             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5831             SCTP_M_MCORE);
5832 #endif
5833         (void)SCTP_GETTIME_TIMEVAL(&tv);
5834 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5835         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5836         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5837         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5838 #else
5839         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5840         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5841         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5842 #endif
5843         /* init the empty list of (All) Endpoints */
5844         LIST_INIT(&SCTP_BASE_INFO(listhead));
5845
5846
5847         /* init the hash table of endpoints */
5848         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5849         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5850         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5851         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5852             &SCTP_BASE_INFO(hashasocmark));
5853         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5854             &SCTP_BASE_INFO(hashmark));
5855         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5856             &SCTP_BASE_INFO(hashtcpmark));
5857         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5858
5859
5860         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5861             &SCTP_BASE_INFO(hashvrfmark));
5862
5863         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5864             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5865         /* init the zones */
5866         /*
5867          * FIX ME: Should check for NULL returns, but if it does fail we are
5868          * doomed to panic anyways... add later maybe.
5869          */
5870         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5871             sizeof(struct sctp_inpcb), maxsockets);
5872
5873         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5874             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5875
5876         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5877             sizeof(struct sctp_laddr),
5878             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5879
5880         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5881             sizeof(struct sctp_nets),
5882             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5883
5884         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5885             sizeof(struct sctp_tmit_chunk),
5886             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5887
5888         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5889             sizeof(struct sctp_queued_to_read),
5890             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5891
5892         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5893             sizeof(struct sctp_stream_queue_pending),
5894             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5895
5896         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5897             sizeof(struct sctp_asconf),
5898             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5899
5900         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5901             sizeof(struct sctp_asconf_ack),
5902             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5903
5904
5905         /* Master Lock INIT for info structure */
5906         SCTP_INP_INFO_LOCK_INIT();
5907         SCTP_STATLOG_INIT_LOCK();
5908
5909         SCTP_IPI_COUNT_INIT();
5910         SCTP_IPI_ADDR_INIT();
5911 #ifdef SCTP_PACKET_LOGGING
5912         SCTP_IP_PKTLOG_INIT();
5913 #endif
5914         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5915
5916         SCTP_WQ_ADDR_INIT();
5917         /* not sure if we need all the counts */
5918         SCTP_BASE_INFO(ipi_count_ep) = 0;
5919         /* assoc/tcb zone info */
5920         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5921         /* local addrlist zone info */
5922         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5923         /* remote addrlist zone info */
5924         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5925         /* chunk info */
5926         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5927
5928         /* socket queue zone info */
5929         SCTP_BASE_INFO(ipi_count_readq) = 0;
5930
5931         /* stream out queue cont */
5932         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5933
5934         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5935         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5936
5937         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5938
5939         /* Init the TIMEWAIT list */
5940         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5941                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5942         }
5943
5944         sctp_startup_iterator();
5945
5946 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5947         sctp_startup_mcore_threads();
5948 #endif
5949
5950         /*
5951          * INIT the default VRF which for BSD is the only one, other O/S's
5952          * may have more. But initially they must start with one and then
5953          * add the VRF's as addresses are added.
5954          */
5955         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5956 }
5957
5958 /*
5959  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5960  */
5961 void
5962 sctp_pcb_finish(void)
5963 {
5964         struct sctp_vrflist *vrf_bucket;
5965         struct sctp_vrf *vrf, *nvrf;
5966         struct sctp_ifn *ifn, *nifn;
5967         struct sctp_ifa *ifa, *nifa;
5968         struct sctpvtaghead *chain;
5969         struct sctp_tagblock *twait_block, *prev_twait_block;
5970         struct sctp_laddr *wi, *nwi;
5971         int i;
5972
5973         /*
5974          * Free BSD the it thread never exits but we do clean up. The only
5975          * way freebsd reaches here if we have VRF's but we still add the
5976          * ifdef to make it compile on old versions.
5977          */
5978         {
5979                 struct sctp_iterator *it, *nit;
5980
5981                 SCTP_IPI_ITERATOR_WQ_LOCK();
5982                 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5983                         if (it->vn != curvnet) {
5984                                 continue;
5985                         }
5986                         TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5987                         if (it->function_atend != NULL) {
5988                                 (*it->function_atend) (it->pointer, it->val);
5989                         }
5990                         SCTP_FREE(it, SCTP_M_ITER);
5991                 }
5992                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5993                 SCTP_ITERATOR_LOCK();
5994                 if ((sctp_it_ctl.cur_it) &&
5995                     (sctp_it_ctl.cur_it->vn == curvnet)) {
5996                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5997                 }
5998                 SCTP_ITERATOR_UNLOCK();
5999         }
6000
6001         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
6002         SCTP_WQ_ADDR_LOCK();
6003         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
6004                 LIST_REMOVE(wi, sctp_nxt_addr);
6005                 SCTP_DECR_LADDR_COUNT();
6006                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
6007         }
6008         SCTP_WQ_ADDR_UNLOCK();
6009
6010         /*
6011          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
6012          * destroyed first).
6013          */
6014         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
6015         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
6016                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
6017                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
6018                                 /* free the ifa */
6019                                 LIST_REMOVE(ifa, next_bucket);
6020                                 LIST_REMOVE(ifa, next_ifa);
6021                                 SCTP_FREE(ifa, SCTP_M_IFA);
6022                         }
6023                         /* free the ifn */
6024                         LIST_REMOVE(ifn, next_bucket);
6025                         LIST_REMOVE(ifn, next_ifn);
6026                         SCTP_FREE(ifn, SCTP_M_IFN);
6027                 }
6028                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
6029                 /* free the vrf */
6030                 LIST_REMOVE(vrf, next_vrf);
6031                 SCTP_FREE(vrf, SCTP_M_VRF);
6032         }
6033         /* free the vrf hashes */
6034         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
6035         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
6036
6037         /*
6038          * free the TIMEWAIT list elements malloc'd in the function
6039          * sctp_add_vtag_to_timewait()...
6040          */
6041         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6042                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
6043                 if (!LIST_EMPTY(chain)) {
6044                         prev_twait_block = NULL;
6045                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6046                                 if (prev_twait_block) {
6047                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6048                                 }
6049                                 prev_twait_block = twait_block;
6050                         }
6051                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6052                 }
6053         }
6054
6055         /* free the locks and mutexes */
6056 #ifdef SCTP_PACKET_LOGGING
6057         SCTP_IP_PKTLOG_DESTROY();
6058 #endif
6059         SCTP_IPI_ADDR_DESTROY();
6060         SCTP_STATLOG_DESTROY();
6061         SCTP_INP_INFO_LOCK_DESTROY();
6062
6063         SCTP_WQ_ADDR_DESTROY();
6064
6065         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6066         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6067         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6068         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6069         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6070         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6071         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6072         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6073         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6074         /* Get rid of other stuff to */
6075         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6076                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6077         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6078                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6079         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6080                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6081 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6082         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6083 #endif
6084 }
6085
6086
6087 int
6088 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6089     int offset, int limit, struct sctphdr *sh,
6090     struct sockaddr *altsa)
6091 {
6092         /*
6093          * grub through the INIT pulling addresses and loading them to the
6094          * nets structure in the asoc. The from address in the mbuf should
6095          * also be loaded (if it is not already). This routine can be called
6096          * with either INIT or INIT-ACK's as long as the m points to the IP
6097          * packet and the offset points to the beginning of the parameters.
6098          */
6099         struct sctp_inpcb *inp;
6100         struct sctp_nets *net, *nnet, *net_tmp;
6101         struct ip *iph;
6102         struct sctp_paramhdr *phdr, parm_buf;
6103         struct sctp_tcb *stcb_tmp;
6104         uint16_t ptype, plen;
6105         struct sockaddr *sa;
6106         struct sockaddr_storage dest_store;
6107         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
6108         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6109         struct sctp_auth_random *p_random = NULL;
6110         uint16_t random_len = 0;
6111         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6112         struct sctp_auth_hmac_algo *hmacs = NULL;
6113         uint16_t hmacs_len = 0;
6114         uint8_t saw_asconf = 0;
6115         uint8_t saw_asconf_ack = 0;
6116         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6117         struct sctp_auth_chunk_list *chunks = NULL;
6118         uint16_t num_chunks = 0;
6119         sctp_key_t *new_key;
6120         uint32_t keylen;
6121         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6122         uint8_t ecn_allowed;
6123
6124 #ifdef INET
6125         struct sockaddr_in sin;
6126
6127 #endif
6128 #ifdef INET6
6129         struct sockaddr_in6 sin6;
6130
6131 #endif
6132
6133         /* First get the destination address setup too. */
6134 #ifdef INET
6135         memset(&sin, 0, sizeof(sin));
6136         sin.sin_family = AF_INET;
6137         sin.sin_len = sizeof(sin);
6138         sin.sin_port = stcb->rport;
6139 #endif
6140 #ifdef INET6
6141         memset(&sin6, 0, sizeof(sin6));
6142         sin6.sin6_family = AF_INET6;
6143         sin6.sin6_len = sizeof(struct sockaddr_in6);
6144         sin6.sin6_port = stcb->rport;
6145 #endif
6146         iph = mtod(m, struct ip *);
6147         switch (iph->ip_v) {
6148 #ifdef INET
6149         case IPVERSION:
6150                 {
6151                         /* its IPv4 */
6152                         struct sockaddr_in *sin_2;
6153
6154                         sin_2 = (struct sockaddr_in *)(local_sa);
6155                         memset(sin_2, 0, sizeof(sin));
6156                         sin_2->sin_family = AF_INET;
6157                         sin_2->sin_len = sizeof(sin);
6158                         sin_2->sin_port = sh->dest_port;
6159                         sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
6160                         if (altsa) {
6161                                 /*
6162                                  * For cookies we use the src address NOT
6163                                  * from the packet but from the original
6164                                  * INIT.
6165                                  */
6166                                 sa = altsa;
6167                         } else {
6168                                 sin.sin_addr = iph->ip_src;
6169                                 sa = (struct sockaddr *)&sin;
6170                         }
6171                         break;
6172                 }
6173 #endif
6174 #ifdef INET6
6175         case IPV6_VERSION >> 4:
6176                 {
6177                         /* its IPv6 */
6178                         struct ip6_hdr *ip6;
6179                         struct sockaddr_in6 *sin6_2;
6180
6181                         ip6 = mtod(m, struct ip6_hdr *);
6182                         sin6_2 = (struct sockaddr_in6 *)(local_sa);
6183                         memset(sin6_2, 0, sizeof(sin6));
6184                         sin6_2->sin6_family = AF_INET6;
6185                         sin6_2->sin6_len = sizeof(struct sockaddr_in6);
6186                         sin6_2->sin6_port = sh->dest_port;
6187                         sin6_2->sin6_addr = ip6->ip6_dst;
6188                         if (altsa) {
6189                                 /*
6190                                  * For cookies we use the src address NOT
6191                                  * from the packet but from the original
6192                                  * INIT.
6193                                  */
6194                                 sa = altsa;
6195                         } else {
6196                                 sin6.sin6_addr = ip6->ip6_src;
6197                                 sa = (struct sockaddr *)&sin6;
6198                         }
6199                         break;
6200                 }
6201 #endif
6202         default:
6203                 return (-1);
6204                 break;
6205         }
6206         /* Turn off ECN until we get through all params */
6207         ecn_allowed = 0;
6208         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6209                 /* mark all addresses that we have currently on the list */
6210                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6211         }
6212         /* does the source address already exist? if so skip it */
6213         inp = stcb->sctp_ep;
6214         atomic_add_int(&stcb->asoc.refcnt, 1);
6215         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
6216         atomic_add_int(&stcb->asoc.refcnt, -1);
6217
6218         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6219                 /* we must add the source address */
6220                 /* no scope set here since we have a tcb already. */
6221                 switch (sa->sa_family) {
6222 #ifdef INET
6223                 case AF_INET:
6224                         if (stcb->asoc.ipv4_addr_legal) {
6225                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6226                                         return (-1);
6227                                 }
6228                         }
6229                         break;
6230 #endif
6231 #ifdef INET6
6232                 case AF_INET6:
6233                         if (stcb->asoc.ipv6_addr_legal) {
6234                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6235                                         return (-2);
6236                                 }
6237                         }
6238                         break;
6239 #endif
6240                 default:
6241                         break;
6242                 }
6243         } else {
6244                 if (net_tmp != NULL && stcb_tmp == stcb) {
6245                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6246                 } else if (stcb_tmp != stcb) {
6247                         /* It belongs to another association? */
6248                         if (stcb_tmp)
6249                                 SCTP_TCB_UNLOCK(stcb_tmp);
6250                         return (-3);
6251                 }
6252         }
6253         if (stcb->asoc.state == 0) {
6254                 /* the assoc was freed? */
6255                 return (-4);
6256         }
6257         /*
6258          * peer must explicitly turn this on. This may have been initialized
6259          * to be "on" in order to allow local addr changes while INIT's are
6260          * in flight.
6261          */
6262         stcb->asoc.peer_supports_asconf = 0;
6263         /* now we must go through each of the params. */
6264         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6265         while (phdr) {
6266                 ptype = ntohs(phdr->param_type);
6267                 plen = ntohs(phdr->param_length);
6268                 /*
6269                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6270                  * (uint32_t)ptype, (int)plen);
6271                  */
6272                 if (offset + plen > limit) {
6273                         break;
6274                 }
6275                 if (plen == 0) {
6276                         break;
6277                 }
6278 #ifdef INET
6279                 if (ptype == SCTP_IPV4_ADDRESS) {
6280                         if (stcb->asoc.ipv4_addr_legal) {
6281                                 struct sctp_ipv4addr_param *p4, p4_buf;
6282
6283                                 /* ok get the v4 address and check/add */
6284                                 phdr = sctp_get_next_param(m, offset,
6285                                     (struct sctp_paramhdr *)&p4_buf,
6286                                     sizeof(p4_buf));
6287                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6288                                     phdr == NULL) {
6289                                         return (-5);
6290                                 }
6291                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6292                                 sin.sin_addr.s_addr = p4->addr;
6293                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6294                                         /* Skip multi-cast addresses */
6295                                         goto next_param;
6296                                 }
6297                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6298                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6299                                         goto next_param;
6300                                 }
6301                                 sa = (struct sockaddr *)&sin;
6302                                 inp = stcb->sctp_ep;
6303                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6304                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6305                                     local_sa, stcb);
6306                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6307
6308                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6309                                     inp == NULL) {
6310                                         /* we must add the source address */
6311                                         /*
6312                                          * no scope set since we have a tcb
6313                                          * already
6314                                          */
6315
6316                                         /*
6317                                          * we must validate the state again
6318                                          * here
6319                                          */
6320                         add_it_now:
6321                                         if (stcb->asoc.state == 0) {
6322                                                 /* the assoc was freed? */
6323                                                 return (-7);
6324                                         }
6325                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6326                                                 return (-8);
6327                                         }
6328                                 } else if (stcb_tmp == stcb) {
6329                                         if (stcb->asoc.state == 0) {
6330                                                 /* the assoc was freed? */
6331                                                 return (-10);
6332                                         }
6333                                         if (net != NULL) {
6334                                                 /* clear flag */
6335                                                 net->dest_state &=
6336                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6337                                         }
6338                                 } else {
6339                                         /*
6340                                          * strange, address is in another
6341                                          * assoc? straighten out locks.
6342                                          */
6343                                         if (stcb_tmp) {
6344                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6345                                                         /*
6346                                                          * in setup state we
6347                                                          * abort this guy
6348                                                          */
6349                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6350                                                             stcb_tmp, 1, NULL, 0);
6351                                                         goto add_it_now;
6352                                                 }
6353                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6354                                         }
6355                                         if (stcb->asoc.state == 0) {
6356                                                 /* the assoc was freed? */
6357                                                 return (-12);
6358                                         }
6359                                         return (-13);
6360                                 }
6361                         }
6362                 } else
6363 #endif
6364 #ifdef INET6
6365                 if (ptype == SCTP_IPV6_ADDRESS) {
6366                         if (stcb->asoc.ipv6_addr_legal) {
6367                                 /* ok get the v6 address and check/add */
6368                                 struct sctp_ipv6addr_param *p6, p6_buf;
6369
6370                                 phdr = sctp_get_next_param(m, offset,
6371                                     (struct sctp_paramhdr *)&p6_buf,
6372                                     sizeof(p6_buf));
6373                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6374                                     phdr == NULL) {
6375                                         return (-14);
6376                                 }
6377                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6378                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6379                                     sizeof(p6->addr));
6380                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6381                                         /* Skip multi-cast addresses */
6382                                         goto next_param;
6383                                 }
6384                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6385                                         /*
6386                                          * Link local make no sense without
6387                                          * scope
6388                                          */
6389                                         goto next_param;
6390                                 }
6391                                 sa = (struct sockaddr *)&sin6;
6392                                 inp = stcb->sctp_ep;
6393                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6394                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6395                                     local_sa, stcb);
6396                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6397                                 if (stcb_tmp == NULL &&
6398                                     (inp == stcb->sctp_ep || inp == NULL)) {
6399                                         /*
6400                                          * we must validate the state again
6401                                          * here
6402                                          */
6403                         add_it_now6:
6404                                         if (stcb->asoc.state == 0) {
6405                                                 /* the assoc was freed? */
6406                                                 return (-16);
6407                                         }
6408                                         /*
6409                                          * we must add the address, no scope
6410                                          * set
6411                                          */
6412                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6413                                                 return (-17);
6414                                         }
6415                                 } else if (stcb_tmp == stcb) {
6416                                         /*
6417                                          * we must validate the state again
6418                                          * here
6419                                          */
6420                                         if (stcb->asoc.state == 0) {
6421                                                 /* the assoc was freed? */
6422                                                 return (-19);
6423                                         }
6424                                         if (net != NULL) {
6425                                                 /* clear flag */
6426                                                 net->dest_state &=
6427                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6428                                         }
6429                                 } else {
6430                                         /*
6431                                          * strange, address is in another
6432                                          * assoc? straighten out locks.
6433                                          */
6434                                         if (stcb_tmp)
6435                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6436                                                         /*
6437                                                          * in setup state we
6438                                                          * abort this guy
6439                                                          */
6440                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6441                                                             stcb_tmp, 1, NULL, 0);
6442                                                         goto add_it_now6;
6443                                                 }
6444                                         SCTP_TCB_UNLOCK(stcb_tmp);
6445
6446                                         if (stcb->asoc.state == 0) {
6447                                                 /* the assoc was freed? */
6448                                                 return (-21);
6449                                         }
6450                                         return (-22);
6451                                 }
6452                         }
6453                 } else
6454 #endif
6455                 if (ptype == SCTP_ECN_CAPABLE) {
6456                         ecn_allowed = 1;
6457                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6458                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6459                                 struct sctp_adaptation_layer_indication ai,
6460                                                                 *aip;
6461
6462                                 phdr = sctp_get_next_param(m, offset,
6463                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6464                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6465                                 if (aip) {
6466                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6467                                         stcb->asoc.adaptation_needed = 1;
6468                                 }
6469                         }
6470                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6471                         struct sctp_asconf_addr_param lstore, *fee;
6472                         int lptype;
6473                         struct sockaddr *lsa = NULL;
6474
6475 #ifdef INET
6476                         struct sctp_asconf_addrv4_param *fii;
6477
6478 #endif
6479
6480                         stcb->asoc.peer_supports_asconf = 1;
6481                         if (plen > sizeof(lstore)) {
6482                                 return (-23);
6483                         }
6484                         phdr = sctp_get_next_param(m, offset,
6485                             (struct sctp_paramhdr *)&lstore,
6486                             min(plen, sizeof(lstore)));
6487                         if (phdr == NULL) {
6488                                 return (-24);
6489                         }
6490                         fee = (struct sctp_asconf_addr_param *)phdr;
6491                         lptype = ntohs(fee->addrp.ph.param_type);
6492                         switch (lptype) {
6493 #ifdef INET
6494                         case SCTP_IPV4_ADDRESS:
6495                                 if (plen !=
6496                                     sizeof(struct sctp_asconf_addrv4_param)) {
6497                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6498                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6499                                             plen);
6500                                 } else {
6501                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6502                                         sin.sin_addr.s_addr = fii->addrp.addr;
6503                                         lsa = (struct sockaddr *)&sin;
6504                                 }
6505                                 break;
6506 #endif
6507 #ifdef INET6
6508                         case SCTP_IPV6_ADDRESS:
6509                                 if (plen !=
6510                                     sizeof(struct sctp_asconf_addr_param)) {
6511                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6512                                             (int)sizeof(struct sctp_asconf_addr_param),
6513                                             plen);
6514                                 } else {
6515                                         memcpy(sin6.sin6_addr.s6_addr,
6516                                             fee->addrp.addr,
6517                                             sizeof(fee->addrp.addr));
6518                                         lsa = (struct sockaddr *)&sin6;
6519                                 }
6520                                 break;
6521 #endif
6522                         default:
6523                                 break;
6524                         }
6525                         if (lsa) {
6526                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6527                         }
6528                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6529                         stcb->asoc.peer_supports_nat = 1;
6530                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6531                         /* Peer supports pr-sctp */
6532                         stcb->asoc.peer_supports_prsctp = 1;
6533                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6534                         /* A supported extension chunk */
6535                         struct sctp_supported_chunk_types_param *pr_supported;
6536                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6537                         int num_ent, i;
6538
6539                         phdr = sctp_get_next_param(m, offset,
6540                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6541                         if (phdr == NULL) {
6542                                 return (-25);
6543                         }
6544                         stcb->asoc.peer_supports_asconf = 0;
6545                         stcb->asoc.peer_supports_prsctp = 0;
6546                         stcb->asoc.peer_supports_pktdrop = 0;
6547                         stcb->asoc.peer_supports_strreset = 0;
6548                         stcb->asoc.peer_supports_nr_sack = 0;
6549                         stcb->asoc.peer_supports_auth = 0;
6550                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6551                         num_ent = plen - sizeof(struct sctp_paramhdr);
6552                         for (i = 0; i < num_ent; i++) {
6553                                 switch (pr_supported->chunk_types[i]) {
6554                                 case SCTP_ASCONF:
6555                                 case SCTP_ASCONF_ACK:
6556                                         stcb->asoc.peer_supports_asconf = 1;
6557                                         break;
6558                                 case SCTP_FORWARD_CUM_TSN:
6559                                         stcb->asoc.peer_supports_prsctp = 1;
6560                                         break;
6561                                 case SCTP_PACKET_DROPPED:
6562                                         stcb->asoc.peer_supports_pktdrop = 1;
6563                                         break;
6564                                 case SCTP_NR_SELECTIVE_ACK:
6565                                         stcb->asoc.peer_supports_nr_sack = 1;
6566                                         break;
6567                                 case SCTP_STREAM_RESET:
6568                                         stcb->asoc.peer_supports_strreset = 1;
6569                                         break;
6570                                 case SCTP_AUTHENTICATION:
6571                                         stcb->asoc.peer_supports_auth = 1;
6572                                         break;
6573                                 default:
6574                                         /* one I have not learned yet */
6575                                         break;
6576
6577                                 }
6578                         }
6579                 } else if (ptype == SCTP_RANDOM) {
6580                         if (plen > sizeof(random_store))
6581                                 break;
6582                         if (got_random) {
6583                                 /* already processed a RANDOM */
6584                                 goto next_param;
6585                         }
6586                         phdr = sctp_get_next_param(m, offset,
6587                             (struct sctp_paramhdr *)random_store,
6588                             min(sizeof(random_store), plen));
6589                         if (phdr == NULL)
6590                                 return (-26);
6591                         p_random = (struct sctp_auth_random *)phdr;
6592                         random_len = plen - sizeof(*p_random);
6593                         /* enforce the random length */
6594                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6595                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6596                                 return (-27);
6597                         }
6598                         got_random = 1;
6599                 } else if (ptype == SCTP_HMAC_LIST) {
6600                         int num_hmacs;
6601                         int i;
6602
6603                         if (plen > sizeof(hmacs_store))
6604                                 break;
6605                         if (got_hmacs) {
6606                                 /* already processed a HMAC list */
6607                                 goto next_param;
6608                         }
6609                         phdr = sctp_get_next_param(m, offset,
6610                             (struct sctp_paramhdr *)hmacs_store,
6611                             min(plen, sizeof(hmacs_store)));
6612                         if (phdr == NULL)
6613                                 return (-28);
6614                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6615                         hmacs_len = plen - sizeof(*hmacs);
6616                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6617                         /* validate the hmac list */
6618                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6619                                 return (-29);
6620                         }
6621                         if (stcb->asoc.peer_hmacs != NULL)
6622                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6623                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6624                         if (stcb->asoc.peer_hmacs != NULL) {
6625                                 for (i = 0; i < num_hmacs; i++) {
6626                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6627                                             ntohs(hmacs->hmac_ids[i]));
6628                                 }
6629                         }
6630                         got_hmacs = 1;
6631                 } else if (ptype == SCTP_CHUNK_LIST) {
6632                         int i;
6633
6634                         if (plen > sizeof(chunks_store))
6635                                 break;
6636                         if (got_chklist) {
6637                                 /* already processed a Chunks list */
6638                                 goto next_param;
6639                         }
6640                         phdr = sctp_get_next_param(m, offset,
6641                             (struct sctp_paramhdr *)chunks_store,
6642                             min(plen, sizeof(chunks_store)));
6643                         if (phdr == NULL)
6644                                 return (-30);
6645                         chunks = (struct sctp_auth_chunk_list *)phdr;
6646                         num_chunks = plen - sizeof(*chunks);
6647                         if (stcb->asoc.peer_auth_chunks != NULL)
6648                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6649                         else
6650                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6651                         for (i = 0; i < num_chunks; i++) {
6652                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6653                                     stcb->asoc.peer_auth_chunks);
6654                                 /* record asconf/asconf-ack if listed */
6655                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6656                                         saw_asconf = 1;
6657                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6658                                         saw_asconf_ack = 1;
6659
6660                         }
6661                         got_chklist = 1;
6662                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6663                             (ptype == SCTP_STATE_COOKIE) ||
6664                             (ptype == SCTP_UNRECOG_PARAM) ||
6665                             (ptype == SCTP_COOKIE_PRESERVE) ||
6666                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6667                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6668                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6669                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6670                     (ptype == SCTP_SUCCESS_REPORT)) {
6671                          /* don't care */ ;
6672                 } else {
6673                         if ((ptype & 0x8000) == 0x0000) {
6674                                 /*
6675                                  * must stop processing the rest of the
6676                                  * param's. Any report bits were handled
6677                                  * with the call to
6678                                  * sctp_arethere_unrecognized_parameters()
6679                                  * when the INIT or INIT-ACK was first seen.
6680                                  */
6681                                 break;
6682                         }
6683                 }
6684
6685 next_param:
6686                 offset += SCTP_SIZE32(plen);
6687                 if (offset >= limit) {
6688                         break;
6689                 }
6690                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6691                     sizeof(parm_buf));
6692         }
6693         /* Now check to see if we need to purge any addresses */
6694         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6695                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6696                     SCTP_ADDR_NOT_IN_ASSOC) {
6697                         /* This address has been removed from the asoc */
6698                         /* remove and free it */
6699                         stcb->asoc.numnets--;
6700                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6701                         sctp_free_remote_addr(net);
6702                         if (net == stcb->asoc.primary_destination) {
6703                                 stcb->asoc.primary_destination = NULL;
6704                                 sctp_select_primary_destination(stcb);
6705                         }
6706                 }
6707         }
6708         if (ecn_allowed == 0) {
6709                 stcb->asoc.ecn_allowed = 0;
6710         }
6711         /* validate authentication required parameters */
6712         if (got_random && got_hmacs) {
6713                 stcb->asoc.peer_supports_auth = 1;
6714         } else {
6715                 stcb->asoc.peer_supports_auth = 0;
6716         }
6717         if (!stcb->asoc.peer_supports_auth && got_chklist) {
6718                 /* peer does not support auth but sent a chunks list? */
6719                 return (-31);
6720         }
6721         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6722             !stcb->asoc.peer_supports_auth) {
6723                 /* peer supports asconf but not auth? */
6724                 return (-32);
6725         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6726             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6727                 return (-33);
6728         }
6729         /* concatenate the full random key */
6730         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6731         if (chunks != NULL) {
6732                 keylen += sizeof(*chunks) + num_chunks;
6733         }
6734         new_key = sctp_alloc_key(keylen);
6735         if (new_key != NULL) {
6736                 /* copy in the RANDOM */
6737                 if (p_random != NULL) {
6738                         keylen = sizeof(*p_random) + random_len;
6739                         bcopy(p_random, new_key->key, keylen);
6740                 }
6741                 /* append in the AUTH chunks */
6742                 if (chunks != NULL) {
6743                         bcopy(chunks, new_key->key + keylen,
6744                             sizeof(*chunks) + num_chunks);
6745                         keylen += sizeof(*chunks) + num_chunks;
6746                 }
6747                 /* append in the HMACs */
6748                 if (hmacs != NULL) {
6749                         bcopy(hmacs, new_key->key + keylen,
6750                             sizeof(*hmacs) + hmacs_len);
6751                 }
6752         } else {
6753                 /* failed to get memory for the key */
6754                 return (-34);
6755         }
6756         if (stcb->asoc.authinfo.peer_random != NULL)
6757                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6758         stcb->asoc.authinfo.peer_random = new_key;
6759         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6760         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6761
6762         return (0);
6763 }
6764
6765 int
6766 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6767     struct sctp_nets *net)
6768 {
6769         /* make sure the requested primary address exists in the assoc */
6770         if (net == NULL && sa)
6771                 net = sctp_findnet(stcb, sa);
6772
6773         if (net == NULL) {
6774                 /* didn't find the requested primary address! */
6775                 return (-1);
6776         } else {
6777                 /* set the primary address */
6778                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6779                         /* Must be confirmed, so queue to set */
6780                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6781                         return (0);
6782                 }
6783                 stcb->asoc.primary_destination = net;
6784                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6785                         sctp_free_remote_addr(stcb->asoc.alternate);
6786                         stcb->asoc.alternate = NULL;
6787                 }
6788                 net = TAILQ_FIRST(&stcb->asoc.nets);
6789                 if (net != stcb->asoc.primary_destination) {
6790                         /*
6791                          * first one on the list is NOT the primary
6792                          * sctp_cmpaddr() is much more efficient if the
6793                          * primary is the first on the list, make it so.
6794                          */
6795                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6796                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6797                 }
6798                 return (0);
6799         }
6800 }
6801
6802 int
6803 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6804 {
6805         /*
6806          * This function serves two purposes. It will see if a TAG can be
6807          * re-used and return 1 for yes it is ok and 0 for don't use that
6808          * tag. A secondary function it will do is purge out old tags that
6809          * can be removed.
6810          */
6811         struct sctpvtaghead *chain;
6812         struct sctp_tagblock *twait_block;
6813         struct sctpasochead *head;
6814         struct sctp_tcb *stcb;
6815         int i;
6816
6817         SCTP_INP_INFO_RLOCK();
6818         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6819             SCTP_BASE_INFO(hashasocmark))];
6820         if (head == NULL) {
6821                 /* invalid vtag */
6822                 goto skip_vtag_check;
6823         }
6824         LIST_FOREACH(stcb, head, sctp_asocs) {
6825                 /*
6826                  * We choose not to lock anything here. TCB's can't be
6827                  * removed since we have the read lock, so they can't be
6828                  * freed on us, same thing for the INP. I may be wrong with
6829                  * this assumption, but we will go with it for now :-)
6830                  */
6831                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6832                         continue;
6833                 }
6834                 if (stcb->asoc.my_vtag == tag) {
6835                         /* candidate */
6836                         if (stcb->rport != rport) {
6837                                 continue;
6838                         }
6839                         if (stcb->sctp_ep->sctp_lport != lport) {
6840                                 continue;
6841                         }
6842                         /* Its a used tag set */
6843                         SCTP_INP_INFO_RUNLOCK();
6844                         return (0);
6845                 }
6846         }
6847 skip_vtag_check:
6848
6849         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6850         /* Now what about timed wait ? */
6851         if (!LIST_EMPTY(chain)) {
6852                 /*
6853                  * Block(s) are present, lets see if we have this tag in the
6854                  * list
6855                  */
6856                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6857                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6858                                 if (twait_block->vtag_block[i].v_tag == 0) {
6859                                         /* not used */
6860                                         continue;
6861                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6862                                     now->tv_sec) {
6863                                         /* Audit expires this guy */
6864                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
6865                                         twait_block->vtag_block[i].v_tag = 0;
6866                                         twait_block->vtag_block[i].lport = 0;
6867                                         twait_block->vtag_block[i].rport = 0;
6868                                 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6869                                             (twait_block->vtag_block[i].lport == lport) &&
6870                                     (twait_block->vtag_block[i].rport == rport)) {
6871                                         /* Bad tag, sorry :< */
6872                                         SCTP_INP_INFO_RUNLOCK();
6873                                         return (0);
6874                                 }
6875                         }
6876                 }
6877         }
6878         SCTP_INP_INFO_RUNLOCK();
6879         return (1);
6880 }
6881
6882 static void
6883 sctp_drain_mbufs(struct sctp_tcb *stcb)
6884 {
6885         /*
6886          * We must hunt this association for MBUF's past the cumack (i.e.
6887          * out of order data that we can renege on).
6888          */
6889         struct sctp_association *asoc;
6890         struct sctp_tmit_chunk *chk, *nchk;
6891         uint32_t cumulative_tsn_p1;
6892         struct sctp_queued_to_read *ctl, *nctl;
6893         int cnt, strmat;
6894         uint32_t gap, i;
6895         int fnd = 0;
6896
6897         /* We look for anything larger than the cum-ack + 1 */
6898
6899         asoc = &stcb->asoc;
6900         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6901                 /* none we can reneg on. */
6902                 return;
6903         }
6904         SCTP_STAT_INCR(sctps_protocol_drains_done);
6905         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6906         cnt = 0;
6907         /* First look in the re-assembly queue */
6908         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6909                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6910                         /* Yep it is above cum-ack */
6911                         cnt++;
6912                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6913                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6914                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6915                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6916                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6917                         if (chk->data) {
6918                                 sctp_m_freem(chk->data);
6919                                 chk->data = NULL;
6920                         }
6921                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6922                 }
6923         }
6924         /* Ok that was fun, now we will drain all the inbound streams? */
6925         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6926                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6927                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6928                                 /* Yep it is above cum-ack */
6929                                 cnt++;
6930                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6931                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6932                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6933                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6934                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6935                                 if (ctl->data) {
6936                                         sctp_m_freem(ctl->data);
6937                                         ctl->data = NULL;
6938                                 }
6939                                 sctp_free_remote_addr(ctl->whoFrom);
6940                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6941                                 SCTP_DECR_READQ_COUNT();
6942                         }
6943                 }
6944         }
6945         if (cnt) {
6946                 /* We must back down to see what the new highest is */
6947                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6948                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6949                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6950                                 asoc->highest_tsn_inside_map = i;
6951                                 fnd = 1;
6952                                 break;
6953                         }
6954                 }
6955                 if (!fnd) {
6956                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6957                 }
6958                 /*
6959                  * Question, should we go through the delivery queue? The
6960                  * only reason things are on here is the app not reading OR
6961                  * a p-d-api up. An attacker COULD send enough in to
6962                  * initiate the PD-API and then send a bunch of stuff to
6963                  * other streams... these would wind up on the delivery
6964                  * queue.. and then we would not get to them. But in order
6965                  * to do this I then have to back-track and un-deliver
6966                  * sequence numbers in streams.. el-yucko. I think for now
6967                  * we will NOT look at the delivery queue and leave it to be
6968                  * something to consider later. An alternative would be to
6969                  * abort the P-D-API with a notification and then deliver
6970                  * the data.... Or another method might be to keep track of
6971                  * how many times the situation occurs and if we see a
6972                  * possible attack underway just abort the association.
6973                  */
6974 #ifdef SCTP_DEBUG
6975                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6976 #endif
6977                 /*
6978                  * Now do we need to find a new
6979                  * asoc->highest_tsn_inside_map?
6980                  */
6981                 asoc->last_revoke_count = cnt;
6982                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6983                 /* sa_ignore NO_NULL_CHK */
6984                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6985                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6986         }
6987         /*
6988          * Another issue, in un-setting the TSN's in the mapping array we
6989          * DID NOT adjust the highest_tsn marker.  This will cause one of
6990          * two things to occur. It may cause us to do extra work in checking
6991          * for our mapping array movement. More importantly it may cause us
6992          * to SACK every datagram. This may not be a bad thing though since
6993          * we will recover once we get our cum-ack above and all this stuff
6994          * we dumped recovered.
6995          */
6996 }
6997
6998 void
6999 sctp_drain()
7000 {
7001         /*
7002          * We must walk the PCB lists for ALL associations here. The system
7003          * is LOW on MBUF's and needs help. This is where reneging will
7004          * occur. We really hope this does NOT happen!
7005          */
7006         VNET_ITERATOR_DECL(vnet_iter);
7007         VNET_LIST_RLOCK_NOSLEEP();
7008         VNET_FOREACH(vnet_iter) {
7009                 CURVNET_SET(vnet_iter);
7010                 struct sctp_inpcb *inp;
7011                 struct sctp_tcb *stcb;
7012
7013                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
7014                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7015 #ifdef VIMAGE
7016                         continue;
7017 #else
7018                         return;
7019 #endif
7020                 }
7021                 SCTP_INP_INFO_RLOCK();
7022                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7023                         /* For each endpoint */
7024                         SCTP_INP_RLOCK(inp);
7025                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7026                                 /* For each association */
7027                                 SCTP_TCB_LOCK(stcb);
7028                                 sctp_drain_mbufs(stcb);
7029                                 SCTP_TCB_UNLOCK(stcb);
7030                         }
7031                         SCTP_INP_RUNLOCK(inp);
7032                 }
7033                 SCTP_INP_INFO_RUNLOCK();
7034                 CURVNET_RESTORE();
7035         }
7036         VNET_LIST_RUNLOCK_NOSLEEP();
7037 }
7038
7039 /*
7040  * start a new iterator
7041  * iterates through all endpoints and associations based on the pcb_state
7042  * flags and asoc_state.  "af" (mandatory) is executed for all matching
7043  * assocs and "ef" (optional) is executed when the iterator completes.
7044  * "inpf" (optional) is executed for each new endpoint as it is being
7045  * iterated through. inpe (optional) is called when the inp completes
7046  * its way through all the stcbs.
7047  */
7048 int
7049 sctp_initiate_iterator(inp_func inpf,
7050     asoc_func af,
7051     inp_func inpe,
7052     uint32_t pcb_state,
7053     uint32_t pcb_features,
7054     uint32_t asoc_state,
7055     void *argp,
7056     uint32_t argi,
7057     end_func ef,
7058     struct sctp_inpcb *s_inp,
7059     uint8_t chunk_output_off)
7060 {
7061         struct sctp_iterator *it = NULL;
7062
7063         if (af == NULL) {
7064                 return (-1);
7065         }
7066         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7067             SCTP_M_ITER);
7068         if (it == NULL) {
7069                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7070                 return (ENOMEM);
7071         }
7072         memset(it, 0, sizeof(*it));
7073         it->function_assoc = af;
7074         it->function_inp = inpf;
7075         if (inpf)
7076                 it->done_current_ep = 0;
7077         else
7078                 it->done_current_ep = 1;
7079         it->function_atend = ef;
7080         it->pointer = argp;
7081         it->val = argi;
7082         it->pcb_flags = pcb_state;
7083         it->pcb_features = pcb_features;
7084         it->asoc_state = asoc_state;
7085         it->function_inp_end = inpe;
7086         it->no_chunk_output = chunk_output_off;
7087         it->vn = curvnet;
7088         if (s_inp) {
7089                 /* Assume lock is held here */
7090                 it->inp = s_inp;
7091                 SCTP_INP_INCR_REF(it->inp);
7092                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7093         } else {
7094                 SCTP_INP_INFO_RLOCK();
7095                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7096                 if (it->inp) {
7097                         SCTP_INP_INCR_REF(it->inp);
7098                 }
7099                 SCTP_INP_INFO_RUNLOCK();
7100                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7101
7102         }
7103         SCTP_IPI_ITERATOR_WQ_LOCK();
7104
7105         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7106         if (sctp_it_ctl.iterator_running == 0) {
7107                 sctp_wakeup_iterator();
7108         }
7109         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7110         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7111         return (0);
7112 }