sys/netinet/sctp_pcb.c

   1 /*-
   2  * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are met:
   6  *
   7  * a) Redistributions of source code must retain the above copyright notice,
   8  *   this list of conditions and the following disclaimer.
   9  *
  10  * b) Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in
  12  *   the documentation and/or other materials provided with the distribution.
  13  *
  14  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  15  *    contributors may be used to endorse or promote products derived
  16  *    from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  20  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  28  * THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 /* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $     */
  32
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35
  36 #include <netinet/sctp_os.h>
  37 #include <sys/proc.h>
  38 #include <netinet/sctp_var.h>
  39 #include <netinet/sctp_sysctl.h>
  40 #include <netinet/sctp_pcb.h>
  41 #include <netinet/sctputil.h>
  42 #include <netinet/sctp.h>
  43 #include <netinet/sctp_header.h>
  44 #include <netinet/sctp_asconf.h>
  45 #include <netinet/sctp_output.h>
  46 #include <netinet/sctp_timer.h>
  47 #include <netinet/sctp_bsd_addr.h>
  48
  49
  50 struct sctp_epinfo sctppcbinfo;
  51
  52 /* FIX: we don't handle multiple link local scopes */
  53 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  54 #ifdef INET6
  55 int
  56 SCTP6_ARE_ADDR_EQUAL(struct in6_addr *a, struct in6_addr *b)
  57 {
  58         struct in6_addr tmp_a, tmp_b;
  59
  60         /* use a copy of a and b */
  61         tmp_a = *a;
  62         tmp_b = *b;
  63         in6_clearscope(&tmp_a);
  64         in6_clearscope(&tmp_b);
  65         return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b));
  66 }
  67
  68 #endif
  69
  70 void
  71 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  72 {
  73         /*
  74          * We really don't need to lock this, but I will just because it
  75          * does not hurt.
  76          */
  77         SCTP_INP_INFO_RLOCK();
  78         spcb->ep_count = sctppcbinfo.ipi_count_ep;
  79         spcb->asoc_count = sctppcbinfo.ipi_count_asoc;
  80         spcb->laddr_count = sctppcbinfo.ipi_count_laddr;
  81         spcb->raddr_count = sctppcbinfo.ipi_count_raddr;
  82         spcb->chk_count = sctppcbinfo.ipi_count_chunk;
  83         spcb->readq_count = sctppcbinfo.ipi_count_readq;
  84         spcb->stream_oque = sctppcbinfo.ipi_count_strmoq;
  85         spcb->free_chunks = sctppcbinfo.ipi_free_chunks;
  86
  87         SCTP_INP_INFO_RUNLOCK();
  88 }
  89
  90 /*
  91  * Addresses are added to VRF's (Virtual Router's). For BSD we
  92  * have only the default VRF 0. We maintain a hash list of
  93  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
  94  * these has a list of addresses. When we add a new address
  95  * to a VRF we lookup the ifn/ifn_index, if the ifn does
  96  * not exist we create it and add it to the list of IFN's
  97  * within the VRF. Once we have the sctp_ifn, we add the
  98  * address to the list. So we look something like:
  99  *
 100  * hash-vrf-table
 101  *   vrf-> ifn-> ifn -> ifn
 102  *   vrf    |
 103  *    ...   +--ifa-> ifa -> ifa
 104  *   vrf
 105  *
 106  * We keep these seperate lists since the SCTP subsystem will
 107  * point to these from its source address selection nets structure.
 108  * When an address is deleted it does not happen right away on
 109  * the SCTP side, it gets scheduled. What we do when a
 110  * delete happens is immediately remove the address from
 111  * the master list and decrement the refcount. As our
 112  * addip iterator works through and frees the src address
 113  * selection pointing to the sctp_ifa, eventually the refcount
 114  * will reach 0 and we will delete it. Note that it is assumed
 115  * that any locking on system level ifn/ifa is done at the
 116  * caller of these functions and these routines will only
 117  * lock the SCTP structures as they add or delete things.
 118  *
 119  * Other notes on VRF concepts.
 120  *  - An endpoint can be in multiple VRF's
 121  *  - An association lives within a VRF and only one VRF.
 122  *  - Any incoming packet we can deduce the VRF for by
 123  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 124  *  - Any downward send call or connect call must supply the
 125  *    VRF via ancillary data or via some sort of set default
 126  *    VRF socket option call (again for BSD no brainer since
 127  *    the VRF is always 0).
 128  *  - An endpoint may add multiple VRF's to it.
 129  *  - Listening sockets can accept associations in any
 130  *    of the VRF's they are in but the assoc will end up
 131  *    in only one VRF (gotten from the packet or connect/send).
 132  *
 133  */
 134
 135 struct sctp_vrf *
 136 sctp_allocate_vrf(int vrf_id)
 137 {
 138         struct sctp_vrf *vrf = NULL;
 139         struct sctp_vrflist *bucket;
 140
 141         /* First allocate the VRF structure */
 142         vrf = sctp_find_vrf(vrf_id);
 143         if (vrf) {
 144                 /* Already allocated */
 145                 return (vrf);
 146         }
 147         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 148             SCTP_M_VRF);
 149         if (vrf == NULL) {
 150                 /* No memory */
 151 #ifdef INVARIANTS
 152                 panic("No memory for VRF:%d", vrf_id);
 153 #endif
 154                 return (NULL);
 155         }
 156         /* setup the VRF */
 157         memset(vrf, 0, sizeof(struct sctp_vrf));
 158         vrf->vrf_id = vrf_id;
 159         LIST_INIT(&vrf->ifnlist);
 160         vrf->total_ifa_count = 0;
 161         vrf->refcount = 0;
 162         /* now also setup table ids */
 163         SCTP_INIT_VRF_TABLEID(vrf);
 164         /* Init the HASH of addresses */
 165         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 166             &vrf->vrf_addr_hashmark);
 167         if (vrf->vrf_addr_hash == NULL) {
 168                 /* No memory */
 169 #ifdef INVARIANTS
 170                 panic("No memory for VRF:%d", vrf_id);
 171 #endif
 172                 SCTP_FREE(vrf, SCTP_M_VRF);
 173                 return (NULL);
 174         }
 175         /* Add it to the hash table */
 176         bucket = &sctppcbinfo.sctp_vrfhash[(vrf_id & sctppcbinfo.hashvrfmark)];
 177         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 178         atomic_add_int(&sctppcbinfo.ipi_count_vrfs, 1);
 179         return (vrf);
 180 }
 181
 182
 183 struct sctp_ifn *
 184 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 185 {
 186         struct sctp_ifn *sctp_ifnp;
 187         struct sctp_ifnlist *hash_ifn_head;
 188
 189         /*
 190          * We assume the lock is held for the addresses if thats wrong
 191          * problems could occur :-)
 192          */
 193         hash_ifn_head = &sctppcbinfo.vrf_ifn_hash[(ifn_index & sctppcbinfo.vrf_ifn_hashmark)];
 194         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 195                 if (sctp_ifnp->ifn_index == ifn_index) {
 196                         return (sctp_ifnp);
 197                 }
 198                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 199                         return (sctp_ifnp);
 200                 }
 201         }
 202         return (NULL);
 203 }
 204
 205
 206
 207 struct sctp_vrf *
 208 sctp_find_vrf(uint32_t vrf_id)
 209 {
 210         struct sctp_vrflist *bucket;
 211         struct sctp_vrf *liste;
 212
 213         bucket = &sctppcbinfo.sctp_vrfhash[(vrf_id & sctppcbinfo.hashvrfmark)];
 214         LIST_FOREACH(liste, bucket, next_vrf) {
 215                 if (vrf_id == liste->vrf_id) {
 216                         return (liste);
 217                 }
 218         }
 219         return (NULL);
 220 }
 221
 222 void
 223 sctp_free_vrf(struct sctp_vrf *vrf)
 224 {
 225         int ret;
 226
 227         ret = atomic_fetchadd_int(&vrf->refcount, -1);
 228         if (ret == 1) {
 229                 if (vrf->vrf_addr_hash) {
 230                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 231                         vrf->vrf_addr_hash = NULL;
 232                 }
 233                 /* We zero'd the count */
 234                 LIST_REMOVE(vrf, next_vrf);
 235                 SCTP_FREE(vrf, SCTP_M_VRF);
 236                 atomic_subtract_int(&sctppcbinfo.ipi_count_vrfs, 1);
 237         }
 238 }
 239
 240 void
 241 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 242 {
 243         int ret;
 244
 245         ret = atomic_fetchadd_int(&sctp_ifnp->refcount, -1);
 246         if (ret == 1) {
 247                 /* We zero'd the count */
 248                 if (sctp_ifnp->vrf) {
 249                         sctp_free_vrf(sctp_ifnp->vrf);
 250                 }
 251                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 252                 atomic_subtract_int(&sctppcbinfo.ipi_count_ifns, 1);
 253         }
 254 }
 255
 256 void
 257 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 258 {
 259         struct sctp_ifn *sctp_ifnp;
 260
 261         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 262         if (sctp_ifnp != NULL) {
 263                 sctp_ifnp->ifn_mtu = mtu;
 264         }
 265 }
 266
 267
 268 void
 269 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 270 {
 271         int ret;
 272
 273         ret = atomic_fetchadd_int(&sctp_ifap->refcount, -1);
 274         if (ret == 1) {
 275                 /* We zero'd the count */
 276                 if (sctp_ifap->ifn_p) {
 277                         sctp_free_ifn(sctp_ifap->ifn_p);
 278                 }
 279                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 280                 atomic_subtract_int(&sctppcbinfo.ipi_count_ifas, 1);
 281         }
 282 }
 283
 284 static void
 285 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 286 {
 287         struct sctp_ifn *found;
 288
 289         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 290         if (found == NULL) {
 291                 /* Not in the list.. sorry */
 292                 return;
 293         }
 294         if (hold_addr_lock == 0)
 295                 SCTP_IPI_ADDR_WLOCK();
 296         LIST_REMOVE(sctp_ifnp, next_bucket);
 297         LIST_REMOVE(sctp_ifnp, next_ifn);
 298         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 299             sctp_ifnp->registered_af);
 300         if (hold_addr_lock == 0)
 301                 SCTP_IPI_ADDR_WUNLOCK();
 302         /* Take away the reference, and possibly free it */
 303         sctp_free_ifn(sctp_ifnp);
 304 }
 305
 306 void
 307 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 308     const char *if_name, uint32_t ifn_index)
 309 {
 310         struct sctp_vrf *vrf;
 311         struct sctp_ifa *sctp_ifap = NULL;
 312
 313         SCTP_IPI_ADDR_RLOCK();
 314         vrf = sctp_find_vrf(vrf_id);
 315         if (vrf == NULL) {
 316                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 317                 goto out;
 318
 319         }
 320         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 321         if (sctp_ifap == NULL) {
 322                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 323                 goto out;
 324         }
 325         if (sctp_ifap->ifn_p == NULL) {
 326                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 327                 goto out;
 328         }
 329         if (if_name) {
 330                 int len1, len2;
 331
 332                 len1 = strlen(if_name);
 333                 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
 334                 if (len1 != len2) {
 335                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n",
 336                             len1, len2);
 337                         goto out;
 338                 }
 339                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
 340                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 341                             sctp_ifap->ifn_p->ifn_name,
 342                             if_name);
 343                         goto out;
 344                 }
 345         } else {
 346                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 347                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 348                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 349                         goto out;
 350                 }
 351         }
 352
 353         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 354         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 355 out:
 356         SCTP_IPI_ADDR_RUNLOCK();
 357 }
 358
 359 void
 360 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 361     const char *if_name, uint32_t ifn_index)
 362 {
 363         struct sctp_vrf *vrf;
 364         struct sctp_ifa *sctp_ifap = NULL;
 365
 366         SCTP_IPI_ADDR_RLOCK();
 367         vrf = sctp_find_vrf(vrf_id);
 368         if (vrf == NULL) {
 369                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 370                 goto out;
 371
 372         }
 373         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 374         if (sctp_ifap == NULL) {
 375                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 376                 goto out;
 377         }
 378         if (sctp_ifap->ifn_p == NULL) {
 379                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 380                 goto out;
 381         }
 382         if (if_name) {
 383                 int len1, len2;
 384
 385                 len1 = strlen(if_name);
 386                 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
 387                 if (len1 != len2) {
 388                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n",
 389                             len1, len2);
 390                         goto out;
 391                 }
 392                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
 393                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 394                             sctp_ifap->ifn_p->ifn_name,
 395                             if_name);
 396                         goto out;
 397                 }
 398         } else {
 399                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 400                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 401                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 402                         goto out;
 403                 }
 404         }
 405
 406         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 407         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 408 out:
 409         SCTP_IPI_ADDR_RUNLOCK();
 410 }
 411
 412 /*-
 413  * Add an ifa to an ifn.
 414  * Register the interface as necessary.
 415  * NOTE: ADDR write lock MUST be held.
 416  */
 417 static void
 418 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 419 {
 420         int ifa_af;
 421
 422         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 423         sctp_ifap->ifn_p = sctp_ifnp;
 424         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 425         /* update address counts */
 426         sctp_ifnp->ifa_count++;
 427         ifa_af = sctp_ifap->address.sa.sa_family;
 428         if (ifa_af == AF_INET)
 429                 sctp_ifnp->num_v4++;
 430         else
 431                 sctp_ifnp->num_v6++;
 432         if (sctp_ifnp->ifa_count == 1) {
 433                 /* register the new interface */
 434                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 435                 sctp_ifnp->registered_af = ifa_af;
 436         }
 437 }
 438
 439 /*-
 440  * Remove an ifa from its ifn.
 441  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 442  * the interface based on the remaining address families left.
 443  * NOTE: ADDR write lock MUST be held.
 444  */
 445 static void
 446 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 447 {
 448         uint32_t ifn_index;
 449
 450         LIST_REMOVE(sctp_ifap, next_ifa);
 451         if (sctp_ifap->ifn_p) {
 452                 /* update address counts */
 453                 sctp_ifap->ifn_p->ifa_count--;
 454                 if (sctp_ifap->address.sa.sa_family == AF_INET6)
 455                         sctp_ifap->ifn_p->num_v6--;
 456                 else if (sctp_ifap->address.sa.sa_family == AF_INET)
 457                         sctp_ifap->ifn_p->num_v4--;
 458
 459                 ifn_index = sctp_ifap->ifn_p->ifn_index;
 460                 if (SCTP_LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 461                         /* remove the ifn, possibly freeing it */
 462                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 463                 } else {
 464                         /* re-register address family type, if needed */
 465                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 466                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 467                                 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET6);
 468                                 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET);
 469                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 470                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 471                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 472                                 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET);
 473                                 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET6);
 474                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 475                         }
 476                         /* free the ifn refcount */
 477                         sctp_free_ifn(sctp_ifap->ifn_p);
 478                 }
 479                 sctp_ifap->ifn_p = NULL;
 480         }
 481 }
 482
 483 struct sctp_ifa *
 484 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 485     uint32_t ifn_type, const char *if_name, void *ifa,
 486     struct sockaddr *addr, uint32_t ifa_flags,
 487     int dynamic_add)
 488 {
 489         struct sctp_vrf *vrf;
 490         struct sctp_ifn *sctp_ifnp = NULL;
 491         struct sctp_ifa *sctp_ifap = NULL;
 492         struct sctp_ifalist *hash_addr_head;
 493         struct sctp_ifnlist *hash_ifn_head;
 494         uint32_t hash_of_addr;
 495         int new_ifn_af = 0;
 496
 497 #ifdef SCTP_DEBUG
 498         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 499         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 500 #endif
 501         SCTP_IPI_ADDR_WLOCK();
 502         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 503         if (sctp_ifnp) {
 504                 vrf = sctp_ifnp->vrf;
 505         } else {
 506                 vrf = sctp_find_vrf(vrf_id);
 507                 if (vrf == NULL) {
 508                         vrf = sctp_allocate_vrf(vrf_id);
 509                         if (vrf == NULL) {
 510                                 SCTP_IPI_ADDR_WUNLOCK();
 511                                 return (NULL);
 512                         }
 513                 }
 514         }
 515         if (sctp_ifnp == NULL) {
 516                 /*
 517                  * build one and add it, can't hold lock until after malloc
 518                  * done though.
 519                  */
 520                 SCTP_IPI_ADDR_WUNLOCK();
 521                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 522                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 523                 if (sctp_ifnp == NULL) {
 524 #ifdef INVARIANTS
 525                         panic("No memory for IFN:%u", sctp_ifnp->ifn_index);
 526 #endif
 527                         return (NULL);
 528                 }
 529                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 530                 sctp_ifnp->ifn_index = ifn_index;
 531                 sctp_ifnp->ifn_p = ifn;
 532                 sctp_ifnp->ifn_type = ifn_type;
 533                 sctp_ifnp->refcount = 0;
 534                 sctp_ifnp->vrf = vrf;
 535                 atomic_add_int(&vrf->refcount, 1);
 536                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 537                 if (if_name != NULL) {
 538                         memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ);
 539                 } else {
 540                         memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ));
 541                 }
 542                 hash_ifn_head = &sctppcbinfo.vrf_ifn_hash[(ifn_index & sctppcbinfo.vrf_ifn_hashmark)];
 543                 LIST_INIT(&sctp_ifnp->ifalist);
 544                 SCTP_IPI_ADDR_WLOCK();
 545                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 546                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 547                 atomic_add_int(&sctppcbinfo.ipi_count_ifns, 1);
 548                 new_ifn_af = 1;
 549         }
 550         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 551         if (sctp_ifap) {
 552                 /* Hmm, it already exists? */
 553                 if ((sctp_ifap->ifn_p) &&
 554                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 555                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 556                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 557                             sctp_ifap);
 558                         if (new_ifn_af) {
 559                                 /* Remove the created one that we don't want */
 560                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 561                         }
 562                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 563                                 /* easy to solve, just switch back to active */
 564                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 565                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 566                                 sctp_ifap->ifn_p = sctp_ifnp;
 567                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 568                         }
 569         exit_stage_left:
 570                         SCTP_IPI_ADDR_WUNLOCK();
 571                         return (sctp_ifap);
 572                 } else {
 573                         if (sctp_ifap->ifn_p) {
 574                                 /*
 575                                  * The last IFN gets the address, removee
 576                                  * the old one
 577                                  */
 578                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 579                                     sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 580                                     sctp_ifap->ifn_p->ifn_index, if_name,
 581                                     ifn_index);
 582                                 /* remove the address from the old ifn */
 583                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 584                                 /* move the address over to the new ifn */
 585                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 586                                 goto exit_stage_left;
 587                         } else {
 588                                 /* repair ifnp which was NULL ? */
 589                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 590                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 591                                     sctp_ifnp, sctp_ifap);
 592                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 593                         }
 594                         goto exit_stage_left;
 595                 }
 596         }
 597         SCTP_IPI_ADDR_WUNLOCK();
 598         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 599         if (sctp_ifap == NULL) {
 600 #ifdef INVARIANTS
 601                 panic("No memory for IFA");
 602 #endif
 603                 return (NULL);
 604         }
 605         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 606         sctp_ifap->ifn_p = sctp_ifnp;
 607         atomic_add_int(&sctp_ifnp->refcount, 1);
 608         sctp_ifap->vrf_id = vrf_id;
 609         sctp_ifap->ifa = ifa;
 610         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 611         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 612         sctp_ifap->flags = ifa_flags;
 613         /* Set scope */
 614         switch (sctp_ifap->address.sa.sa_family) {
 615         case AF_INET:
 616                 {
 617                         struct sockaddr_in *sin;
 618
 619                         sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
 620                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 621                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 622                                 sctp_ifap->src_is_loop = 1;
 623                         }
 624                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 625                                 sctp_ifap->src_is_priv = 1;
 626                         }
 627                         sctp_ifnp->num_v4++;
 628                         if (new_ifn_af)
 629                                 new_ifn_af = AF_INET;
 630                         break;
 631                 }
 632 #ifdef INET6
 633         case AF_INET6:
 634                 {
 635                         /* ok to use deprecated addresses? */
 636                         struct sockaddr_in6 *sin6;
 637
 638                         sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
 639                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 640                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 641                                 sctp_ifap->src_is_loop = 1;
 642                         }
 643                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 644                                 sctp_ifap->src_is_priv = 1;
 645                         }
 646                         sctp_ifnp->num_v6++;
 647                         if (new_ifn_af)
 648                                 new_ifn_af = AF_INET6;
 649                         break;
 650                 }
 651 #endif
 652         default:
 653                 new_ifn_af = 0;
 654                 break;
 655         }
 656         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 657
 658         if ((sctp_ifap->src_is_priv == 0) &&
 659             (sctp_ifap->src_is_loop == 0)) {
 660                 sctp_ifap->src_is_glob = 1;
 661         }
 662         SCTP_IPI_ADDR_WLOCK();
 663         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 664         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 665         sctp_ifap->refcount = 1;
 666         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 667         sctp_ifnp->ifa_count++;
 668         vrf->total_ifa_count++;
 669         atomic_add_int(&sctppcbinfo.ipi_count_ifas, 1);
 670         if (new_ifn_af) {
 671                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 672                 sctp_ifnp->registered_af = new_ifn_af;
 673         }
 674         SCTP_IPI_ADDR_WUNLOCK();
 675         if (dynamic_add) {
 676                 /*
 677                  * Bump up the refcount so that when the timer completes it
 678                  * will drop back down.
 679                  */
 680                 struct sctp_laddr *wi;
 681
 682                 atomic_add_int(&sctp_ifap->refcount, 1);
 683                 wi = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
 684                 if (wi == NULL) {
 685                         /*
 686                          * Gak, what can we do? We have lost an address
 687                          * change can you say HOSED?
 688                          */
 689                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 690                         /* Opps, must decrement the count */
 691                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 692                             if_name);
 693                         return (NULL);
 694                 }
 695                 SCTP_INCR_LADDR_COUNT();
 696                 bzero(wi, sizeof(*wi));
 697                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 698                 wi->ifa = sctp_ifap;
 699                 wi->action = SCTP_ADD_IP_ADDRESS;
 700                 SCTP_IPI_ITERATOR_WQ_LOCK();
 701                 /*
 702                  * Should this really be a tailq? As it is we will process
 703                  * the newest first :-0
 704                  */
 705                 LIST_INSERT_HEAD(&sctppcbinfo.addr_wq, wi, sctp_nxt_addr);
 706                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
 707                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 708                     (struct sctp_inpcb *)NULL,
 709                     (struct sctp_tcb *)NULL,
 710                     (struct sctp_nets *)NULL);
 711         } else {
 712                 /* it's ready for use */
 713                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 714         }
 715         return (sctp_ifap);
 716 }
 717
 718 void
 719 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 720     uint32_t ifn_index, const char *if_name)
 721 {
 722         struct sctp_vrf *vrf;
 723         struct sctp_ifa *sctp_ifap = NULL;
 724
 725         SCTP_IPI_ADDR_WLOCK();
 726         vrf = sctp_find_vrf(vrf_id);
 727         if (vrf == NULL) {
 728                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 729                 goto out_now;
 730         }
 731 #ifdef SCTP_DEBUG
 732         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 733         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 734 #endif
 735         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 736         if (sctp_ifap) {
 737                 /* Validate the delete */
 738                 if (sctp_ifap->ifn_p) {
 739                         int valid = 0;
 740
 741                         /*-
 742                          * The name has priority over the ifn_index
 743                          * if its given. We do this especially for
 744                          * panda who might recycle indexes fast.
 745                          */
 746                         if (if_name) {
 747                                 int len1, len2;
 748
 749                                 len1 = min(SCTP_IFNAMSIZ, strlen(if_name));
 750                                 len2 = min(SCTP_IFNAMSIZ, strlen(sctp_ifap->ifn_p->ifn_name));
 751                                 if (len1 && len2 && (len1 == len2)) {
 752                                         /* we can compare them */
 753                                         if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) == 0) {
 754                                                 /*
 755                                                  * They match its a correct
 756                                                  * delete
 757                                                  */
 758                                                 valid = 1;
 759                                         }
 760                                 }
 761                         }
 762                         if (!valid) {
 763                                 /* last ditch check ifn_index */
 764                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 765                                         valid = 1;
 766                                 }
 767                         }
 768                         if (!valid) {
 769                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 770                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 771                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 772                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 773                                 SCTP_IPI_ADDR_WUNLOCK();
 774                                 return;
 775                         }
 776                 }
 777                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap);
 778                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 779                 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
 780                 vrf->total_ifa_count--;
 781                 LIST_REMOVE(sctp_ifap, next_bucket);
 782                 sctp_remove_ifa_from_ifn(sctp_ifap);
 783         }
 784 #ifdef SCTP_DEBUG
 785         else {
 786                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 787                     ifn_index);
 788                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 789         }
 790 #endif
 791
 792 out_now:
 793         SCTP_IPI_ADDR_WUNLOCK();
 794         if (sctp_ifap) {
 795                 struct sctp_laddr *wi;
 796
 797                 wi = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
 798                 if (wi == NULL) {
 799                         /*
 800                          * Gak, what can we do? We have lost an address
 801                          * change can you say HOSED?
 802                          */
 803                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 804
 805                         /* Oops, must decrement the count */
 806                         sctp_free_ifa(sctp_ifap);
 807                         return;
 808                 }
 809                 SCTP_INCR_LADDR_COUNT();
 810                 bzero(wi, sizeof(*wi));
 811                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 812                 wi->ifa = sctp_ifap;
 813                 wi->action = SCTP_DEL_IP_ADDRESS;
 814                 SCTP_IPI_ITERATOR_WQ_LOCK();
 815                 /*
 816                  * Should this really be a tailq? As it is we will process
 817                  * the newest first :-0
 818                  */
 819                 LIST_INSERT_HEAD(&sctppcbinfo.addr_wq, wi, sctp_nxt_addr);
 820                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
 821
 822                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 823                     (struct sctp_inpcb *)NULL,
 824                     (struct sctp_tcb *)NULL,
 825                     (struct sctp_nets *)NULL);
 826         }
 827         return;
 828 }
 829
 830
 831 static struct sctp_tcb *
 832 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 833     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
 834 {
 835         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
 836         /*
 837          * If we support the TCP model, then we must now dig through to see
 838          * if we can find our endpoint in the list of tcp ep's.
 839          */
 840         uint16_t lport, rport;
 841         struct sctppcbhead *ephead;
 842         struct sctp_inpcb *inp;
 843         struct sctp_laddr *laddr;
 844         struct sctp_tcb *stcb;
 845         struct sctp_nets *net;
 846
 847         if ((to == NULL) || (from == NULL)) {
 848                 return (NULL);
 849         }
 850         if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
 851                 lport = ((struct sockaddr_in *)to)->sin_port;
 852                 rport = ((struct sockaddr_in *)from)->sin_port;
 853         } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
 854                 lport = ((struct sockaddr_in6 *)to)->sin6_port;
 855                 rport = ((struct sockaddr_in6 *)from)->sin6_port;
 856         } else {
 857                 return NULL;
 858         }
 859         ephead = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR(
 860             (lport + rport), sctppcbinfo.hashtcpmark)];
 861         /*
 862          * Ok now for each of the guys in this bucket we must look and see:
 863          * - Does the remote port match. - Does there single association's
 864          * addresses match this address (to). If so we update p_ep to point
 865          * to this ep and return the tcb from it.
 866          */
 867         LIST_FOREACH(inp, ephead, sctp_hash) {
 868                 SCTP_INP_RLOCK(inp);
 869                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 870                         SCTP_INP_RUNLOCK(inp);
 871                         continue;
 872                 }
 873                 if (lport != inp->sctp_lport) {
 874                         SCTP_INP_RUNLOCK(inp);
 875                         continue;
 876                 }
 877                 if (inp->def_vrf_id != vrf_id) {
 878                         SCTP_INP_RUNLOCK(inp);
 879                         continue;
 880                 }
 881                 /* check to see if the ep has one of the addresses */
 882                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 883                         /* We are NOT bound all, so look further */
 884                         int match = 0;
 885
 886                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 887
 888                                 if (laddr->ifa == NULL) {
 889                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
 890                                         continue;
 891                                 }
 892                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 893                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 894                                         continue;
 895                                 }
 896                                 if (laddr->ifa->address.sa.sa_family ==
 897                                     to->sa_family) {
 898                                         /* see if it matches */
 899                                         struct sockaddr_in *intf_addr, *sin;
 900
 901                                         intf_addr = &laddr->ifa->address.sin;
 902                                         sin = (struct sockaddr_in *)to;
 903                                         if (from->sa_family == AF_INET) {
 904                                                 if (sin->sin_addr.s_addr ==
 905                                                     intf_addr->sin_addr.s_addr) {
 906                                                         match = 1;
 907                                                         break;
 908                                                 }
 909                                         }
 910 #ifdef INET6
 911                                         if (from->sa_family == AF_INET6) {
 912                                                 struct sockaddr_in6 *intf_addr6;
 913                                                 struct sockaddr_in6 *sin6;
 914
 915                                                 sin6 = (struct sockaddr_in6 *)
 916                                                     to;
 917                                                 intf_addr6 = &laddr->ifa->address.sin6;
 918
 919                                                 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 920                                                     &intf_addr6->sin6_addr)) {
 921                                                         match = 1;
 922                                                         break;
 923                                                 }
 924                                         }
 925 #endif
 926                                 }
 927                         }
 928                         if (match == 0) {
 929                                 /* This endpoint does not have this address */
 930                                 SCTP_INP_RUNLOCK(inp);
 931                                 continue;
 932                         }
 933                 }
 934                 /*
 935                  * Ok if we hit here the ep has the address, does it hold
 936                  * the tcb?
 937                  */
 938
 939                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 940                 if (stcb == NULL) {
 941                         SCTP_INP_RUNLOCK(inp);
 942                         continue;
 943                 }
 944                 SCTP_TCB_LOCK(stcb);
 945                 if (stcb->rport != rport) {
 946                         /* remote port does not match. */
 947                         SCTP_TCB_UNLOCK(stcb);
 948                         SCTP_INP_RUNLOCK(inp);
 949                         continue;
 950                 }
 951                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 952                         SCTP_TCB_UNLOCK(stcb);
 953                         SCTP_INP_RUNLOCK(inp);
 954                         continue;
 955                 }
 956                 /* Does this TCB have a matching address? */
 957                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 958
 959                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
 960                                 /* not the same family, can't be a match */
 961                                 continue;
 962                         }
 963                         switch (from->sa_family) {
 964                         case AF_INET:
 965                                 {
 966                                         struct sockaddr_in *sin, *rsin;
 967
 968                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
 969                                         rsin = (struct sockaddr_in *)from;
 970                                         if (sin->sin_addr.s_addr ==
 971                                             rsin->sin_addr.s_addr) {
 972                                                 /* found it */
 973                                                 if (netp != NULL) {
 974                                                         *netp = net;
 975                                                 }
 976                                                 /*
 977                                                  * Update the endpoint
 978                                                  * pointer
 979                                                  */
 980                                                 *inp_p = inp;
 981                                                 SCTP_INP_RUNLOCK(inp);
 982                                                 return (stcb);
 983                                         }
 984                                         break;
 985                                 }
 986 #ifdef INET6
 987                         case AF_INET6:
 988                                 {
 989                                         struct sockaddr_in6 *sin6, *rsin6;
 990
 991                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 992                                         rsin6 = (struct sockaddr_in6 *)from;
 993                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 994                                             &rsin6->sin6_addr)) {
 995                                                 /* found it */
 996                                                 if (netp != NULL) {
 997                                                         *netp = net;
 998                                                 }
 999                                                 /*
1000                                                  * Update the endpoint
1001                                                  * pointer
1002                                                  */
1003                                                 *inp_p = inp;
1004                                                 SCTP_INP_RUNLOCK(inp);
1005                                                 return (stcb);
1006                                         }
1007                                         break;
1008                                 }
1009 #endif
1010                         default:
1011                                 /* TSNH */
1012                                 break;
1013                         }
1014                 }
1015                 SCTP_TCB_UNLOCK(stcb);
1016                 SCTP_INP_RUNLOCK(inp);
1017         }
1018         return (NULL);
1019 }
1020
1021 /*
1022  * rules for use
1023  *
1024  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1025  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1026  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1027  * NULL.
1028  */
1029
1030 struct sctp_tcb *
1031 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1032     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1033 {
1034         struct sctpasochead *head;
1035         struct sctp_inpcb *inp;
1036         struct sctp_tcb *stcb = NULL;
1037         struct sctp_nets *net;
1038         uint16_t rport;
1039
1040         inp = *inp_p;
1041         if (remote->sa_family == AF_INET) {
1042                 rport = (((struct sockaddr_in *)remote)->sin_port);
1043         } else if (remote->sa_family == AF_INET6) {
1044                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1045         } else {
1046                 return (NULL);
1047         }
1048         if (locked_tcb) {
1049                 /*
1050                  * UN-lock so we can do proper locking here this occurs when
1051                  * called from load_addresses_from_init.
1052                  */
1053                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1054                 SCTP_TCB_UNLOCK(locked_tcb);
1055         }
1056         SCTP_INP_INFO_RLOCK();
1057         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
1058                 /*-
1059                  * Now either this guy is our listener or it's the
1060                  * connector. If it is the one that issued the connect, then
1061                  * it's only chance is to be the first TCB in the list. If
1062                  * it is the acceptor, then do the special_lookup to hash
1063                  * and find the real inp.
1064                  */
1065                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1066                         /* to is peer addr, from is my addr */
1067                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1068                             netp, inp->def_vrf_id);
1069                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1070                                 /* we have a locked tcb, lower refcount */
1071                                 SCTP_INP_DECR_REF(inp);
1072                         }
1073                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1074                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1075                                 SCTP_TCB_LOCK(locked_tcb);
1076                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1077                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1078                         }
1079                         SCTP_INP_INFO_RUNLOCK();
1080                         return (stcb);
1081                 } else {
1082                         SCTP_INP_WLOCK(inp);
1083                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1084                                 goto null_return;
1085                         }
1086                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1087                         if (stcb == NULL) {
1088                                 goto null_return;
1089                         }
1090                         SCTP_TCB_LOCK(stcb);
1091
1092                         if (stcb->rport != rport) {
1093                                 /* remote port does not match. */
1094                                 SCTP_TCB_UNLOCK(stcb);
1095                                 goto null_return;
1096                         }
1097                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1098                                 SCTP_TCB_UNLOCK(stcb);
1099                                 goto null_return;
1100                         }
1101                         /* now look at the list of remote addresses */
1102                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1103 #ifdef INVARIANTS
1104                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1105                                         panic("Corrupt net list");
1106                                 }
1107 #endif
1108                                 if (net->ro._l_addr.sa.sa_family !=
1109                                     remote->sa_family) {
1110                                         /* not the same family */
1111                                         continue;
1112                                 }
1113                                 switch (remote->sa_family) {
1114                                 case AF_INET:
1115                                         {
1116                                                 struct sockaddr_in *sin,
1117                                                            *rsin;
1118
1119                                                 sin = (struct sockaddr_in *)
1120                                                     &net->ro._l_addr;
1121                                                 rsin = (struct sockaddr_in *)remote;
1122                                                 if (sin->sin_addr.s_addr ==
1123                                                     rsin->sin_addr.s_addr) {
1124                                                         /* found it */
1125                                                         if (netp != NULL) {
1126                                                                 *netp = net;
1127                                                         }
1128                                                         if (locked_tcb == NULL) {
1129                                                                 SCTP_INP_DECR_REF(inp);
1130                                                         } else if (locked_tcb != stcb) {
1131                                                                 SCTP_TCB_LOCK(locked_tcb);
1132                                                         }
1133                                                         if (locked_tcb) {
1134                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1135                                                         }
1136                                                         SCTP_INP_WUNLOCK(inp);
1137                                                         SCTP_INP_INFO_RUNLOCK();
1138                                                         return (stcb);
1139                                                 }
1140                                                 break;
1141                                         }
1142 #ifdef INET6
1143                                 case AF_INET6:
1144                                         {
1145                                                 struct sockaddr_in6 *sin6,
1146                                                             *rsin6;
1147
1148                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1149                                                 rsin6 = (struct sockaddr_in6 *)remote;
1150                                                 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
1151                                                     &rsin6->sin6_addr)) {
1152                                                         /* found it */
1153                                                         if (netp != NULL) {
1154                                                                 *netp = net;
1155                                                         }
1156                                                         if (locked_tcb == NULL) {
1157                                                                 SCTP_INP_DECR_REF(inp);
1158                                                         } else if (locked_tcb != stcb) {
1159                                                                 SCTP_TCB_LOCK(locked_tcb);
1160                                                         }
1161                                                         if (locked_tcb) {
1162                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1163                                                         }
1164                                                         SCTP_INP_WUNLOCK(inp);
1165                                                         SCTP_INP_INFO_RUNLOCK();
1166                                                         return (stcb);
1167                                                 }
1168                                                 break;
1169                                         }
1170 #endif
1171                                 default:
1172                                         /* TSNH */
1173                                         break;
1174                                 }
1175                         }
1176                         SCTP_TCB_UNLOCK(stcb);
1177                 }
1178         } else {
1179                 SCTP_INP_WLOCK(inp);
1180                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1181                         goto null_return;
1182                 }
1183                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1184                     inp->sctp_hashmark)];
1185                 if (head == NULL) {
1186                         goto null_return;
1187                 }
1188                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1189                         if (stcb->rport != rport) {
1190                                 /* remote port does not match */
1191                                 continue;
1192                         }
1193                         SCTP_TCB_LOCK(stcb);
1194                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1195                                 SCTP_TCB_UNLOCK(stcb);
1196                                 continue;
1197                         }
1198                         /* now look at the list of remote addresses */
1199                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1200 #ifdef INVARIANTS
1201                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1202                                         panic("Corrupt net list");
1203                                 }
1204 #endif
1205                                 if (net->ro._l_addr.sa.sa_family !=
1206                                     remote->sa_family) {
1207                                         /* not the same family */
1208                                         continue;
1209                                 }
1210                                 switch (remote->sa_family) {
1211                                 case AF_INET:
1212                                         {
1213                                                 struct sockaddr_in *sin,
1214                                                            *rsin;
1215
1216                                                 sin = (struct sockaddr_in *)
1217                                                     &net->ro._l_addr;
1218                                                 rsin = (struct sockaddr_in *)remote;
1219                                                 if (sin->sin_addr.s_addr ==
1220                                                     rsin->sin_addr.s_addr) {
1221                                                         /* found it */
1222                                                         if (netp != NULL) {
1223                                                                 *netp = net;
1224                                                         }
1225                                                         if (locked_tcb == NULL) {
1226                                                                 SCTP_INP_DECR_REF(inp);
1227                                                         } else if (locked_tcb != stcb) {
1228                                                                 SCTP_TCB_LOCK(locked_tcb);
1229                                                         }
1230                                                         if (locked_tcb) {
1231                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1232                                                         }
1233                                                         SCTP_INP_WUNLOCK(inp);
1234                                                         SCTP_INP_INFO_RUNLOCK();
1235                                                         return (stcb);
1236                                                 }
1237                                                 break;
1238                                         }
1239 #ifdef INET6
1240                                 case AF_INET6:
1241                                         {
1242                                                 struct sockaddr_in6 *sin6,
1243                                                             *rsin6;
1244
1245                                                 sin6 = (struct sockaddr_in6 *)
1246                                                     &net->ro._l_addr;
1247                                                 rsin6 = (struct sockaddr_in6 *)remote;
1248                                                 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
1249                                                     &rsin6->sin6_addr)) {
1250                                                         /* found it */
1251                                                         if (netp != NULL) {
1252                                                                 *netp = net;
1253                                                         }
1254                                                         if (locked_tcb == NULL) {
1255                                                                 SCTP_INP_DECR_REF(inp);
1256                                                         } else if (locked_tcb != stcb) {
1257                                                                 SCTP_TCB_LOCK(locked_tcb);
1258                                                         }
1259                                                         if (locked_tcb) {
1260                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1261                                                         }
1262                                                         SCTP_INP_WUNLOCK(inp);
1263                                                         SCTP_INP_INFO_RUNLOCK();
1264                                                         return (stcb);
1265                                                 }
1266                                                 break;
1267                                         }
1268 #endif
1269                                 default:
1270                                         /* TSNH */
1271                                         break;
1272                                 }
1273                         }
1274                         SCTP_TCB_UNLOCK(stcb);
1275                 }
1276         }
1277 null_return:
1278         /* clean up for returning null */
1279         if (locked_tcb) {
1280                 SCTP_TCB_LOCK(locked_tcb);
1281                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1282         }
1283         SCTP_INP_WUNLOCK(inp);
1284         SCTP_INP_INFO_RUNLOCK();
1285         /* not found */
1286         return (NULL);
1287 }
1288
1289 /*
1290  * Find an association for a specific endpoint using the association id given
1291  * out in the COMM_UP notification
1292  */
1293
1294 struct sctp_tcb *
1295 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1296 {
1297         /*
1298          * Use my the assoc_id to find a endpoint
1299          */
1300         struct sctpasochead *head;
1301         struct sctp_tcb *stcb;
1302         uint32_t id;
1303
1304         if (asoc_id == 0 || inp == NULL) {
1305                 return (NULL);
1306         }
1307         SCTP_INP_INFO_RLOCK();
1308         id = (uint32_t) asoc_id;
1309         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(id,
1310             sctppcbinfo.hashasocmark)];
1311         if (head == NULL) {
1312                 /* invalid id TSNH */
1313                 SCTP_INP_INFO_RUNLOCK();
1314                 return (NULL);
1315         }
1316         LIST_FOREACH(stcb, head, sctp_asocs) {
1317                 SCTP_INP_RLOCK(stcb->sctp_ep);
1318                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1319                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1320                         SCTP_INP_INFO_RUNLOCK();
1321                         return (NULL);
1322                 }
1323                 if (stcb->asoc.assoc_id == id) {
1324                         /* candidate */
1325                         if (inp != stcb->sctp_ep) {
1326                                 /*
1327                                  * some other guy has the same id active (id
1328                                  * collision ??).
1329                                  */
1330                                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1331                                 continue;
1332                         }
1333                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1334                                 continue;
1335                         }
1336                         if (want_lock) {
1337                                 SCTP_TCB_LOCK(stcb);
1338                         }
1339                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1340                         SCTP_INP_INFO_RUNLOCK();
1341                         return (stcb);
1342                 }
1343                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1344         }
1345         /* Ok if we missed here, lets try the restart hash */
1346         head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(id, sctppcbinfo.hashrestartmark)];
1347         if (head == NULL) {
1348                 /* invalid id TSNH */
1349                 SCTP_INP_INFO_RUNLOCK();
1350                 return (NULL);
1351         }
1352         LIST_FOREACH(stcb, head, sctp_tcbrestarhash) {
1353                 SCTP_INP_RLOCK(stcb->sctp_ep);
1354                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1355                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1356                         continue;
1357                 }
1358                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1359                         continue;
1360                 }
1361                 if (want_lock) {
1362                         SCTP_TCB_LOCK(stcb);
1363                 }
1364                 if (stcb->asoc.assoc_id == id) {
1365                         /* candidate */
1366                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1367                         if (inp != stcb->sctp_ep) {
1368                                 /*
1369                                  * some other guy has the same id active (id
1370                                  * collision ??).
1371                                  */
1372                                 if (want_lock) {
1373                                         SCTP_TCB_UNLOCK(stcb);
1374                                 }
1375                                 continue;
1376                         }
1377                         SCTP_INP_INFO_RUNLOCK();
1378                         return (stcb);
1379                 } else {
1380                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1381                 }
1382                 if (want_lock) {
1383                         SCTP_TCB_UNLOCK(stcb);
1384                 }
1385         }
1386         SCTP_INP_INFO_RUNLOCK();
1387         return (NULL);
1388 }
1389
1390
1391 static struct sctp_inpcb *
1392 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1393     uint16_t lport, uint32_t vrf_id)
1394 {
1395         struct sctp_inpcb *inp;
1396         struct sockaddr_in *sin;
1397
1398 #ifdef INET6
1399         struct sockaddr_in6 *sin6;
1400
1401 #endif
1402         struct sctp_laddr *laddr;
1403
1404 #ifdef INET6
1405         struct sockaddr_in6 *intf_addr6;
1406
1407 #endif
1408
1409         int fnd;
1410
1411         /*
1412          * Endpoing probe expects that the INP_INFO is locked.
1413          */
1414         sin = NULL;
1415 #ifdef INET6
1416         sin6 = NULL;
1417 #endif
1418         switch (nam->sa_family) {
1419         case AF_INET:
1420                 sin = (struct sockaddr_in *)nam;
1421                 break;
1422 #ifdef INET6
1423         case AF_INET6:
1424                 sin6 = (struct sockaddr_in6 *)nam;
1425                 break;
1426 #endif
1427         default:
1428                 /* unsupported family */
1429                 return (NULL);
1430         }
1431         if (head == NULL)
1432                 return (NULL);
1433         LIST_FOREACH(inp, head, sctp_hash) {
1434                 SCTP_INP_RLOCK(inp);
1435                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1436                         SCTP_INP_RUNLOCK(inp);
1437                         continue;
1438                 }
1439                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1440                     (inp->sctp_lport == lport)) {
1441                         /* got it */
1442                         if ((nam->sa_family == AF_INET) &&
1443                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1444                             SCTP_IPV6_V6ONLY(inp)) {
1445                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1446                                 SCTP_INP_RUNLOCK(inp);
1447                                 continue;
1448                         }
1449                         /* A V6 address and the endpoint is NOT bound V6 */
1450                         if (nam->sa_family == AF_INET6 &&
1451                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1452                                 SCTP_INP_RUNLOCK(inp);
1453                                 continue;
1454                         }
1455                         /* does a VRF id match? */
1456                         fnd = 0;
1457                         if (inp->def_vrf_id == vrf_id)
1458                                 fnd = 1;
1459
1460                         SCTP_INP_RUNLOCK(inp);
1461                         if (!fnd)
1462                                 continue;
1463                         return (inp);
1464                 }
1465                 SCTP_INP_RUNLOCK(inp);
1466         }
1467
1468         if ((nam->sa_family == AF_INET) &&
1469             (sin->sin_addr.s_addr == INADDR_ANY)) {
1470                 /* Can't hunt for one that has no address specified */
1471                 return (NULL);
1472         }
1473 #ifdef INET6
1474         if ((nam->sa_family == AF_INET6) &&
1475             (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
1476                 /* Can't hunt for one that has no address specified */
1477                 return (NULL);
1478         }
1479 #endif
1480         /*
1481          * ok, not bound to all so see if we can find a EP bound to this
1482          * address.
1483          */
1484         LIST_FOREACH(inp, head, sctp_hash) {
1485                 SCTP_INP_RLOCK(inp);
1486                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1487                         SCTP_INP_RUNLOCK(inp);
1488                         continue;
1489                 }
1490                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1491                         SCTP_INP_RUNLOCK(inp);
1492                         continue;
1493                 }
1494                 /*
1495                  * Ok this could be a likely candidate, look at all of its
1496                  * addresses
1497                  */
1498                 if (inp->sctp_lport != lport) {
1499                         SCTP_INP_RUNLOCK(inp);
1500                         continue;
1501                 }
1502                 /* does a VRF id match? */
1503                 fnd = 0;
1504                 if (inp->def_vrf_id == vrf_id)
1505                         fnd = 1;
1506
1507                 if (!fnd) {
1508                         SCTP_INP_RUNLOCK(inp);
1509                         continue;
1510                 }
1511                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1512                         if (laddr->ifa == NULL) {
1513                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1514                                     __FUNCTION__);
1515                                 continue;
1516                         }
1517                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1518                             laddr->ifa);
1519                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1520                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1521                                 continue;
1522                         }
1523                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1524                                 /* possible, see if it matches */
1525                                 struct sockaddr_in *intf_addr;
1526
1527                                 intf_addr = &laddr->ifa->address.sin;
1528                                 switch (nam->sa_family) {
1529                                 case AF_INET:
1530                                         if (sin->sin_addr.s_addr ==
1531                                             intf_addr->sin_addr.s_addr) {
1532                                                 SCTP_INP_RUNLOCK(inp);
1533                                                 return (inp);
1534                                         }
1535                                         break;
1536 #ifdef INET6
1537                                 case AF_INET6:
1538                                         intf_addr6 = &laddr->ifa->address.sin6;
1539                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
1540                                             &intf_addr6->sin6_addr)) {
1541                                                 SCTP_INP_RUNLOCK(inp);
1542                                                 return (inp);
1543                                         }
1544                                         break;
1545 #endif
1546                                 }
1547                         }
1548                 }
1549                 SCTP_INP_RUNLOCK(inp);
1550         }
1551         return (NULL);
1552 }
1553
1554 struct sctp_inpcb *
1555 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1556     uint32_t vrf_id)
1557 {
1558         /*
1559          * First we check the hash table to see if someone has this port
1560          * bound with just the port.
1561          */
1562         struct sctp_inpcb *inp;
1563         struct sctppcbhead *head;
1564         struct sockaddr_in *sin;
1565         struct sockaddr_in6 *sin6;
1566         int lport;
1567
1568         if (nam->sa_family == AF_INET) {
1569                 sin = (struct sockaddr_in *)nam;
1570                 lport = ((struct sockaddr_in *)nam)->sin_port;
1571         } else if (nam->sa_family == AF_INET6) {
1572                 sin6 = (struct sockaddr_in6 *)nam;
1573                 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
1574         } else {
1575                 /* unsupported family */
1576                 return (NULL);
1577         }
1578         /*
1579          * I could cheat here and just cast to one of the types but we will
1580          * do it right. It also provides the check against an Unsupported
1581          * type too.
1582          */
1583         /* Find the head of the ALLADDR chain */
1584         if (have_lock == 0) {
1585                 SCTP_INP_INFO_RLOCK();
1586         }
1587         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
1588             sctppcbinfo.hashmark)];
1589         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1590
1591         /*
1592          * If the TCP model exists it could be that the main listening
1593          * endpoint is gone but there exists a connected socket for this guy
1594          * yet. If so we can return the first one that we find. This may NOT
1595          * be the correct one but the sctp_findassociation_ep_addr has
1596          * further code to look at all TCP models.
1597          */
1598         if (inp == NULL && find_tcp_pool) {
1599                 unsigned int i;
1600
1601                 for (i = 0; i < sctppcbinfo.hashtblsize; i++) {
1602                         /*
1603                          * This is real gross, but we do NOT have a remote
1604                          * port at this point depending on who is calling.
1605                          * We must therefore look for ANY one that matches
1606                          * our local port :/
1607                          */
1608                         head = &sctppcbinfo.sctp_tcpephash[i];
1609                         if (LIST_FIRST(head)) {
1610                                 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1611                                 if (inp) {
1612                                         /* Found one */
1613                                         break;
1614                                 }
1615                         }
1616                 }
1617         }
1618         if (inp) {
1619                 SCTP_INP_INCR_REF(inp);
1620         }
1621         if (have_lock == 0) {
1622                 SCTP_INP_INFO_RUNLOCK();
1623         }
1624         return (inp);
1625 }
1626
1627 /*
1628  * Find an association for an endpoint with the pointer to whom you want to
1629  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1630  * need to change the *to to some other struct like a mbuf...
1631  */
1632 struct sctp_tcb *
1633 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1634     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1635     uint32_t vrf_id)
1636 {
1637         struct sctp_inpcb *inp = NULL;
1638         struct sctp_tcb *retval;
1639
1640         SCTP_INP_INFO_RLOCK();
1641         if (find_tcp_pool) {
1642                 if (inp_p != NULL) {
1643                         retval = sctp_tcb_special_locate(inp_p, from, to, netp,
1644                             vrf_id);
1645                 } else {
1646                         retval = sctp_tcb_special_locate(&inp, from, to, netp,
1647                             vrf_id);
1648                 }
1649                 if (retval != NULL) {
1650                         SCTP_INP_INFO_RUNLOCK();
1651                         return (retval);
1652                 }
1653         }
1654         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1655         if (inp_p != NULL) {
1656                 *inp_p = inp;
1657         }
1658         SCTP_INP_INFO_RUNLOCK();
1659
1660         if (inp == NULL) {
1661                 return (NULL);
1662         }
1663         /*
1664          * ok, we have an endpoint, now lets find the assoc for it (if any)
1665          * we now place the source address or from in the to of the find
1666          * endpoint call. Since in reality this chain is used from the
1667          * inbound packet side.
1668          */
1669         if (inp_p != NULL) {
1670                 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1671                     NULL);
1672         } else {
1673                 retval = sctp_findassociation_ep_addr(&inp, from, netp, to,
1674                     NULL);
1675         }
1676         return retval;
1677 }
1678
1679
1680 /*
1681  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1682  * find all addresses that the sender has specified in any address list. Each
1683  * address will be used to lookup the TCB and see if one exits.
1684  */
1685 static struct sctp_tcb *
1686 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1687     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1688     struct sockaddr *dest)
1689 {
1690         struct sockaddr_in sin4;
1691         struct sockaddr_in6 sin6;
1692         struct sctp_paramhdr *phdr, parm_buf;
1693         struct sctp_tcb *retval;
1694         uint32_t ptype, plen;
1695
1696         memset(&sin4, 0, sizeof(sin4));
1697         memset(&sin6, 0, sizeof(sin6));
1698         sin4.sin_len = sizeof(sin4);
1699         sin4.sin_family = AF_INET;
1700         sin4.sin_port = sh->src_port;
1701         sin6.sin6_len = sizeof(sin6);
1702         sin6.sin6_family = AF_INET6;
1703         sin6.sin6_port = sh->src_port;
1704
1705         retval = NULL;
1706         offset += sizeof(struct sctp_init_chunk);
1707
1708         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1709         while (phdr != NULL) {
1710                 /* now we must see if we want the parameter */
1711                 ptype = ntohs(phdr->param_type);
1712                 plen = ntohs(phdr->param_length);
1713                 if (plen == 0) {
1714                         break;
1715                 }
1716                 if (ptype == SCTP_IPV4_ADDRESS &&
1717                     plen == sizeof(struct sctp_ipv4addr_param)) {
1718                         /* Get the rest of the address */
1719                         struct sctp_ipv4addr_param ip4_parm, *p4;
1720
1721                         phdr = sctp_get_next_param(m, offset,
1722                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
1723                         if (phdr == NULL) {
1724                                 return (NULL);
1725                         }
1726                         p4 = (struct sctp_ipv4addr_param *)phdr;
1727                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
1728                         /* look it up */
1729                         retval = sctp_findassociation_ep_addr(inp_p,
1730                             (struct sockaddr *)&sin4, netp, dest, NULL);
1731                         if (retval != NULL) {
1732                                 return (retval);
1733                         }
1734                 } else if (ptype == SCTP_IPV6_ADDRESS &&
1735                     plen == sizeof(struct sctp_ipv6addr_param)) {
1736                         /* Get the rest of the address */
1737                         struct sctp_ipv6addr_param ip6_parm, *p6;
1738
1739                         phdr = sctp_get_next_param(m, offset,
1740                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
1741                         if (phdr == NULL) {
1742                                 return (NULL);
1743                         }
1744                         p6 = (struct sctp_ipv6addr_param *)phdr;
1745                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
1746                         /* look it up */
1747                         retval = sctp_findassociation_ep_addr(inp_p,
1748                             (struct sockaddr *)&sin6, netp, dest, NULL);
1749                         if (retval != NULL) {
1750                                 return (retval);
1751                         }
1752                 }
1753                 offset += SCTP_SIZE32(plen);
1754                 phdr = sctp_get_next_param(m, offset, &parm_buf,
1755                     sizeof(parm_buf));
1756         }
1757         return (NULL);
1758 }
1759
1760
1761 static struct sctp_tcb *
1762 sctp_findassoc_by_vtag(struct sockaddr *from, uint32_t vtag,
1763     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
1764     uint16_t lport, int skip_src_check)
1765 {
1766         /*
1767          * Use my vtag to hash. If we find it we then verify the source addr
1768          * is in the assoc. If all goes well we save a bit on rec of a
1769          * packet.
1770          */
1771         struct sctpasochead *head;
1772         struct sctp_nets *net;
1773         struct sctp_tcb *stcb;
1774
1775         *netp = NULL;
1776         *inp_p = NULL;
1777         SCTP_INP_INFO_RLOCK();
1778         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag,
1779             sctppcbinfo.hashasocmark)];
1780         if (head == NULL) {
1781                 /* invalid vtag */
1782                 SCTP_INP_INFO_RUNLOCK();
1783                 return (NULL);
1784         }
1785         LIST_FOREACH(stcb, head, sctp_asocs) {
1786                 SCTP_INP_RLOCK(stcb->sctp_ep);
1787                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1788                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1789                         continue;
1790                 }
1791                 SCTP_TCB_LOCK(stcb);
1792                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1793                 if (stcb->asoc.my_vtag == vtag) {
1794                         /* candidate */
1795                         if (stcb->rport != rport) {
1796                                 /*
1797                                  * we could remove this if vtags are unique
1798                                  * across the system.
1799                                  */
1800                                 SCTP_TCB_UNLOCK(stcb);
1801                                 continue;
1802                         }
1803                         if (stcb->sctp_ep->sctp_lport != lport) {
1804                                 /*
1805                                  * we could remove this if vtags are unique
1806                                  * across the system.
1807                                  */
1808                                 SCTP_TCB_UNLOCK(stcb);
1809                                 continue;
1810                         }
1811                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1812                                 SCTP_TCB_UNLOCK(stcb);
1813                                 continue;
1814                         }
1815                         if (skip_src_check) {
1816                                 *netp = NULL;   /* unknown */
1817                                 if (inp_p)
1818                                         *inp_p = stcb->sctp_ep;
1819                                 SCTP_INP_INFO_RUNLOCK();
1820                                 return (stcb);
1821                         }
1822                         net = sctp_findnet(stcb, from);
1823                         if (net) {
1824                                 /* yep its him. */
1825                                 *netp = net;
1826                                 SCTP_STAT_INCR(sctps_vtagexpress);
1827                                 *inp_p = stcb->sctp_ep;
1828                                 SCTP_INP_INFO_RUNLOCK();
1829                                 return (stcb);
1830                         } else {
1831                                 /*
1832                                  * not him, this should only happen in rare
1833                                  * cases so I peg it.
1834                                  */
1835                                 SCTP_STAT_INCR(sctps_vtagbogus);
1836                         }
1837                 }
1838                 SCTP_TCB_UNLOCK(stcb);
1839         }
1840         SCTP_INP_INFO_RUNLOCK();
1841         return (NULL);
1842 }
1843
1844 /*
1845  * Find an association with the pointer to the inbound IP packet. This can be
1846  * a IPv4 or IPv6 packet.
1847  */
1848 struct sctp_tcb *
1849 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
1850     struct sctphdr *sh, struct sctp_chunkhdr *ch,
1851     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
1852 {
1853         int find_tcp_pool;
1854         struct ip *iph;
1855         struct sctp_tcb *retval;
1856         struct sockaddr_storage to_store, from_store;
1857         struct sockaddr *to = (struct sockaddr *)&to_store;
1858         struct sockaddr *from = (struct sockaddr *)&from_store;
1859         struct sctp_inpcb *inp;
1860
1861         iph = mtod(m, struct ip *);
1862         switch (iph->ip_v) {
1863         case IPVERSION:
1864                 {
1865                         /* its IPv4 */
1866                         struct sockaddr_in *from4;
1867
1868                         from4 = (struct sockaddr_in *)&from_store;
1869                         bzero(from4, sizeof(*from4));
1870                         from4->sin_family = AF_INET;
1871                         from4->sin_len = sizeof(struct sockaddr_in);
1872                         from4->sin_addr.s_addr = iph->ip_src.s_addr;
1873                         from4->sin_port = sh->src_port;
1874                         break;
1875                 }
1876 #ifdef INET6
1877         case IPV6_VERSION >> 4:
1878                 {
1879                         /* its IPv6 */
1880                         struct ip6_hdr *ip6;
1881                         struct sockaddr_in6 *from6;
1882
1883                         ip6 = mtod(m, struct ip6_hdr *);
1884                         from6 = (struct sockaddr_in6 *)&from_store;
1885                         bzero(from6, sizeof(*from6));
1886                         from6->sin6_family = AF_INET6;
1887                         from6->sin6_len = sizeof(struct sockaddr_in6);
1888                         from6->sin6_addr = ip6->ip6_src;
1889                         from6->sin6_port = sh->src_port;
1890                         /* Get the scopes in properly to the sin6 addr's */
1891                         /* we probably don't need these operations */
1892                         (void)sa6_recoverscope(from6);
1893                         sa6_embedscope(from6, ip6_use_defzone);
1894                         break;
1895                 }
1896 #endif
1897         default:
1898                 /* Currently not supported. */
1899                 return (NULL);
1900         }
1901         if (sh->v_tag) {
1902                 /* we only go down this path if vtag is non-zero */
1903                 retval = sctp_findassoc_by_vtag(from, ntohl(sh->v_tag),
1904                     inp_p, netp, sh->src_port, sh->dest_port, 0);
1905                 if (retval) {
1906                         return (retval);
1907                 }
1908         }
1909         switch (iph->ip_v) {
1910         case IPVERSION:
1911                 {
1912                         /* its IPv4 */
1913                         struct sockaddr_in *to4;
1914
1915                         to4 = (struct sockaddr_in *)&to_store;
1916                         bzero(to4, sizeof(*to4));
1917                         to4->sin_family = AF_INET;
1918                         to4->sin_len = sizeof(struct sockaddr_in);
1919                         to4->sin_addr.s_addr = iph->ip_dst.s_addr;
1920                         to4->sin_port = sh->dest_port;
1921                         break;
1922                 }
1923 #ifdef INET6
1924         case IPV6_VERSION >> 4:
1925                 {
1926                         /* its IPv6 */
1927                         struct ip6_hdr *ip6;
1928                         struct sockaddr_in6 *to6;
1929
1930                         ip6 = mtod(m, struct ip6_hdr *);
1931                         to6 = (struct sockaddr_in6 *)&to_store;
1932                         bzero(to6, sizeof(*to6));
1933                         to6->sin6_family = AF_INET6;
1934                         to6->sin6_len = sizeof(struct sockaddr_in6);
1935                         to6->sin6_addr = ip6->ip6_dst;
1936                         to6->sin6_port = sh->dest_port;
1937                         /* Get the scopes in properly to the sin6 addr's */
1938                         /* we probably don't need these operations */
1939                         (void)sa6_recoverscope(to6);
1940                         sa6_embedscope(to6, ip6_use_defzone);
1941                         break;
1942                 }
1943 #endif
1944         default:
1945                 /* TSNH */
1946                 break;
1947         }
1948         find_tcp_pool = 0;
1949         if ((ch->chunk_type != SCTP_INITIATION) &&
1950             (ch->chunk_type != SCTP_INITIATION_ACK) &&
1951             (ch->chunk_type != SCTP_COOKIE_ACK) &&
1952             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
1953                 /* Other chunk types go to the tcp pool. */
1954                 find_tcp_pool = 1;
1955         }
1956         if (inp_p) {
1957                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
1958                     find_tcp_pool, vrf_id);
1959                 inp = *inp_p;
1960         } else {
1961                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
1962                     find_tcp_pool, vrf_id);
1963         }
1964         SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp);
1965         if (retval == NULL && inp) {
1966                 /* Found a EP but not this address */
1967                 if ((ch->chunk_type == SCTP_INITIATION) ||
1968                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
1969                         /*-
1970                          * special hook, we do NOT return linp or an
1971                          * association that is linked to an existing
1972                          * association that is under the TCP pool (i.e. no
1973                          * listener exists). The endpoint finding routine
1974                          * will always find a listner before examining the
1975                          * TCP pool.
1976                          */
1977                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
1978                                 if (inp_p) {
1979                                         *inp_p = NULL;
1980                                 }
1981                                 return (NULL);
1982                         }
1983                         retval = sctp_findassociation_special_addr(m, iphlen,
1984                             offset, sh, &inp, netp, to);
1985                         if (inp_p != NULL) {
1986                                 *inp_p = inp;
1987                         }
1988                 }
1989         }
1990         SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval);
1991         return (retval);
1992 }
1993
1994 /*
1995  * lookup an association by an ASCONF lookup address.
1996  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
1997  */
1998 struct sctp_tcb *
1999 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
2000     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp)
2001 {
2002         struct sctp_tcb *stcb;
2003         struct sockaddr_in *sin;
2004
2005 #ifdef INET6
2006         struct sockaddr_in6 *sin6;
2007
2008 #endif
2009         struct sockaddr_storage local_store, remote_store;
2010         struct ip *iph;
2011
2012 #ifdef INET6
2013         struct ip6_hdr *ip6;
2014
2015 #endif
2016         struct sctp_paramhdr parm_buf, *phdr;
2017         int ptype;
2018         int zero_address = 0;
2019
2020
2021         memset(&local_store, 0, sizeof(local_store));
2022         memset(&remote_store, 0, sizeof(remote_store));
2023
2024         /* First get the destination address setup too. */
2025         iph = mtod(m, struct ip *);
2026         switch (iph->ip_v) {
2027         case IPVERSION:
2028                 /* its IPv4 */
2029                 sin = (struct sockaddr_in *)&local_store;
2030                 sin->sin_family = AF_INET;
2031                 sin->sin_len = sizeof(*sin);
2032                 sin->sin_port = sh->dest_port;
2033                 sin->sin_addr.s_addr = iph->ip_dst.s_addr;
2034                 break;
2035 #ifdef INET6
2036         case IPV6_VERSION >> 4:
2037                 /* its IPv6 */
2038                 ip6 = mtod(m, struct ip6_hdr *);
2039                 sin6 = (struct sockaddr_in6 *)&local_store;
2040                 sin6->sin6_family = AF_INET6;
2041                 sin6->sin6_len = sizeof(*sin6);
2042                 sin6->sin6_port = sh->dest_port;
2043                 sin6->sin6_addr = ip6->ip6_dst;
2044                 break;
2045 #endif
2046         default:
2047                 return NULL;
2048         }
2049
2050         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2051             &parm_buf, sizeof(struct sctp_paramhdr));
2052         if (phdr == NULL) {
2053                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2054                     __FUNCTION__);
2055                 return NULL;
2056         }
2057         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2058         /* get the correlation address */
2059         switch (ptype) {
2060 #ifdef INET6
2061         case SCTP_IPV6_ADDRESS:
2062                 {
2063                         /* ipv6 address param */
2064                         struct sctp_ipv6addr_param *p6, p6_buf;
2065
2066                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2067                                 return NULL;
2068                         }
2069                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2070                             offset + sizeof(struct sctp_asconf_chunk),
2071                             &p6_buf.ph, sizeof(*p6));
2072                         if (p6 == NULL) {
2073                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2074                                     __FUNCTION__);
2075                                 return (NULL);
2076                         }
2077                         sin6 = (struct sockaddr_in6 *)&remote_store;
2078                         sin6->sin6_family = AF_INET6;
2079                         sin6->sin6_len = sizeof(*sin6);
2080                         sin6->sin6_port = sh->src_port;
2081                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2082                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2083                                 zero_address = 1;
2084                         break;
2085                 }
2086 #endif
2087         case SCTP_IPV4_ADDRESS:
2088                 {
2089                         /* ipv4 address param */
2090                         struct sctp_ipv4addr_param *p4, p4_buf;
2091
2092                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2093                                 return NULL;
2094                         }
2095                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2096                             offset + sizeof(struct sctp_asconf_chunk),
2097                             &p4_buf.ph, sizeof(*p4));
2098                         if (p4 == NULL) {
2099                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2100                                     __FUNCTION__);
2101                                 return (NULL);
2102                         }
2103                         sin = (struct sockaddr_in *)&remote_store;
2104                         sin->sin_family = AF_INET;
2105                         sin->sin_len = sizeof(*sin);
2106                         sin->sin_port = sh->src_port;
2107                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2108                         if (sin->sin_addr.s_addr == INADDR_ANY)
2109                                 zero_address = 1;
2110                         break;
2111                 }
2112         default:
2113                 /* invalid address param type */
2114                 return NULL;
2115         }
2116
2117         if (zero_address) {
2118                 stcb = sctp_findassoc_by_vtag(NULL, ntohl(sh->v_tag), inp_p,
2119                     netp, sh->src_port, sh->dest_port, 1);
2120                 /*
2121                  * printf("findassociation_ep_asconf: zero lookup address
2122                  * finds stcb 0x%x\n", (uint32_t)stcb);
2123                  */
2124         } else {
2125                 stcb = sctp_findassociation_ep_addr(inp_p,
2126                     (struct sockaddr *)&remote_store, netp,
2127                     (struct sockaddr *)&local_store, NULL);
2128         }
2129         return (stcb);
2130 }
2131
2132
2133 /*
2134  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2135  * addresses. This way if we don't get a bind we by default pick a ephemeral
2136  * port with all addresses bound.
2137  */
2138 int
2139 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2140 {
2141         /*
2142          * we get called when a new endpoint starts up. We need to allocate
2143          * the sctp_inpcb structure from the zone and init it. Mark it as
2144          * unbound and find a port that we can use as an ephemeral with
2145          * INADDR_ANY. If the user binds later no problem we can then add in
2146          * the specific addresses. And setup the default parameters for the
2147          * EP.
2148          */
2149         int i, error;
2150         struct sctp_inpcb *inp;
2151         struct sctp_pcb *m;
2152         struct timeval time;
2153         sctp_sharedkey_t *null_key;
2154
2155         error = 0;
2156
2157         SCTP_INP_INFO_WLOCK();
2158         inp = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_ep, struct sctp_inpcb);
2159         if (inp == NULL) {
2160                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2161                 SCTP_INP_INFO_WUNLOCK();
2162                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2163                 return (ENOBUFS);
2164         }
2165         /* zap it */
2166         bzero(inp, sizeof(*inp));
2167
2168         /* bump generations */
2169         /* setup socket pointers */
2170         inp->sctp_socket = so;
2171         inp->ip_inp.inp.inp_socket = so;
2172
2173         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2174         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2175
2176 #ifdef IPSEC
2177         {
2178                 struct inpcbpolicy *pcb_sp = NULL;
2179
2180                 error = ipsec_init_policy(so, &pcb_sp);
2181                 /* Arrange to share the policy */
2182                 inp->ip_inp.inp.inp_sp = pcb_sp;
2183                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2184         }
2185         if (error != 0) {
2186                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
2187                 SCTP_INP_INFO_WUNLOCK();
2188                 return error;
2189         }
2190 #endif                          /* IPSEC */
2191         SCTP_INCR_EP_COUNT();
2192         inp->ip_inp.inp.inp_ip_ttl = ip_defttl;
2193         SCTP_INP_INFO_WUNLOCK();
2194
2195         so->so_pcb = (caddr_t)inp;
2196
2197         if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) ||
2198             (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) {
2199                 /* UDP style socket */
2200                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2201                     SCTP_PCB_FLAGS_UNBOUND);
2202                 /* Be sure it is NON-BLOCKING IO for UDP */
2203                 /* SCTP_SET_SO_NBIO(so); */
2204         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2205                 /* TCP style socket */
2206                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2207                     SCTP_PCB_FLAGS_UNBOUND);
2208                 /* Be sure we have blocking IO by default */
2209                 SCTP_CLEAR_SO_NBIO(so);
2210         } else {
2211                 /*
2212                  * unsupported socket type (RAW, etc)- in case we missed it
2213                  * in protosw
2214                  */
2215                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2216                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
2217                 return (EOPNOTSUPP);
2218         }
2219         if (sctp_default_frag_interleave == SCTP_FRAG_LEVEL_1) {
2220                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2221                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2222         } else if (sctp_default_frag_interleave == SCTP_FRAG_LEVEL_2) {
2223                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2224                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2225         } else if (sctp_default_frag_interleave == SCTP_FRAG_LEVEL_0) {
2226                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2227                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2228         }
2229         inp->sctp_tcbhash = SCTP_HASH_INIT(sctp_pcbtblsize,
2230             &inp->sctp_hashmark);
2231         if (inp->sctp_tcbhash == NULL) {
2232                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2233                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2234                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
2235                 return (ENOBUFS);
2236         }
2237         inp->def_vrf_id = vrf_id;
2238
2239         SCTP_INP_INFO_WLOCK();
2240         SCTP_INP_LOCK_INIT(inp);
2241         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2242         SCTP_INP_READ_INIT(inp);
2243         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2244         /* lock the new ep */
2245         SCTP_INP_WLOCK(inp);
2246
2247         /* add it to the info area */
2248         LIST_INSERT_HEAD(&sctppcbinfo.listhead, inp, sctp_list);
2249         SCTP_INP_INFO_WUNLOCK();
2250
2251         TAILQ_INIT(&inp->read_queue);
2252         LIST_INIT(&inp->sctp_addr_list);
2253
2254         LIST_INIT(&inp->sctp_asoc_list);
2255
2256 #ifdef SCTP_TRACK_FREED_ASOCS
2257         /* TEMP CODE */
2258         LIST_INIT(&inp->sctp_asoc_free_list);
2259 #endif
2260         /* Init the timer structure for signature change */
2261         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2262         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2263
2264         /* now init the actual endpoint default data */
2265         m = &inp->sctp_ep;
2266
2267         /* setup the base timeout information */
2268         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2269         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2270         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(sctp_delayed_sack_time_default);
2271         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(sctp_heartbeat_interval_default);
2272         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(sctp_pmtu_raise_time_default);
2273         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(sctp_shutdown_guard_time_default);
2274         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(sctp_secret_lifetime_default);
2275         /* all max/min max are in ms */
2276         m->sctp_maxrto = sctp_rto_max_default;
2277         m->sctp_minrto = sctp_rto_min_default;
2278         m->initial_rto = sctp_rto_initial_default;
2279         m->initial_init_rto_max = sctp_init_rto_max_default;
2280         m->sctp_sack_freq = sctp_sack_freq_default;
2281
2282         m->max_open_streams_intome = MAX_SCTP_STREAMS;
2283
2284         m->max_init_times = sctp_init_rtx_max_default;
2285         m->max_send_times = sctp_assoc_rtx_max_default;
2286         m->def_net_failure = sctp_path_rtx_max_default;
2287         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2288         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2289         m->max_burst = sctp_max_burst_default;
2290         if ((sctp_default_cc_module >= SCTP_CC_RFC2581) &&
2291             (sctp_default_cc_module <= SCTP_CC_HTCP)) {
2292                 m->sctp_default_cc_module = sctp_default_cc_module;
2293         } else {
2294                 /* sysctl done with invalid value, set to 2581 */
2295                 m->sctp_default_cc_module = SCTP_CC_RFC2581;
2296         }
2297         /* number of streams to pre-open on a association */
2298         m->pre_open_stream_count = sctp_nr_outgoing_streams_default;
2299
2300         /* Add adaptation cookie */
2301         m->adaptation_layer_indicator = 0x504C5253;
2302
2303         /* seed random number generator */
2304         m->random_counter = 1;
2305         m->store_at = SCTP_SIGNATURE_SIZE;
2306         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2307         sctp_fill_random_store(m);
2308
2309         /* Minimum cookie size */
2310         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2311             sizeof(struct sctp_state_cookie);
2312         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2313
2314         /* Setup the initial secret */
2315         (void)SCTP_GETTIME_TIMEVAL(&time);
2316         m->time_of_secret_change = time.tv_sec;
2317
2318         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2319                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2320         }
2321         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2322
2323         /* How long is a cookie good for ? */
2324         m->def_cookie_life = MSEC_TO_TICKS(sctp_valid_cookie_life_default);
2325         /*
2326          * Initialize authentication parameters
2327          */
2328         m->local_hmacs = sctp_default_supported_hmaclist();
2329         m->local_auth_chunks = sctp_alloc_chunklist();
2330         sctp_auth_set_default_chunks(m->local_auth_chunks);
2331         LIST_INIT(&m->shared_keys);
2332         /* add default NULL key as key id 0 */
2333         null_key = sctp_alloc_sharedkey();
2334         sctp_insert_sharedkey(&m->shared_keys, null_key);
2335         SCTP_INP_WUNLOCK(inp);
2336 #ifdef SCTP_LOG_CLOSING
2337         sctp_log_closing(inp, NULL, 12);
2338 #endif
2339         return (error);
2340 }
2341
2342
2343 void
2344 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2345     struct sctp_tcb *stcb)
2346 {
2347         struct sctp_nets *net;
2348         uint16_t lport, rport;
2349         struct sctppcbhead *head;
2350         struct sctp_laddr *laddr, *oladdr;
2351
2352         atomic_add_int(&stcb->asoc.refcnt, 1);
2353         SCTP_TCB_UNLOCK(stcb);
2354         SCTP_INP_INFO_WLOCK();
2355         SCTP_INP_WLOCK(old_inp);
2356         SCTP_INP_WLOCK(new_inp);
2357         SCTP_TCB_LOCK(stcb);
2358         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2359
2360         new_inp->sctp_ep.time_of_secret_change =
2361             old_inp->sctp_ep.time_of_secret_change;
2362         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2363             sizeof(old_inp->sctp_ep.secret_key));
2364         new_inp->sctp_ep.current_secret_number =
2365             old_inp->sctp_ep.current_secret_number;
2366         new_inp->sctp_ep.last_secret_number =
2367             old_inp->sctp_ep.last_secret_number;
2368         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2369
2370         /* make it so new data pours into the new socket */
2371         stcb->sctp_socket = new_inp->sctp_socket;
2372         stcb->sctp_ep = new_inp;
2373
2374         /* Copy the port across */
2375         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2376         rport = stcb->rport;
2377         /* Pull the tcb from the old association */
2378         LIST_REMOVE(stcb, sctp_tcbhash);
2379         LIST_REMOVE(stcb, sctp_tcblist);
2380
2381         /* Now insert the new_inp into the TCP connected hash */
2382         head = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR((lport + rport),
2383             sctppcbinfo.hashtcpmark)];
2384
2385         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2386         /* Its safe to access */
2387         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2388
2389         /* Now move the tcb into the endpoint list */
2390         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2391         /*
2392          * Question, do we even need to worry about the ep-hash since we
2393          * only have one connection? Probably not :> so lets get rid of it
2394          * and not suck up any kernel memory in that.
2395          */
2396
2397         /* Ok. Let's restart timer. */
2398         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2399                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2400                     stcb, net);
2401         }
2402
2403         SCTP_INP_INFO_WUNLOCK();
2404         if (new_inp->sctp_tcbhash != NULL) {
2405                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2406                 new_inp->sctp_tcbhash = NULL;
2407         }
2408         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2409                 /* Subset bound, so copy in the laddr list from the old_inp */
2410                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2411                         laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
2412                         if (laddr == NULL) {
2413                                 /*
2414                                  * Gak, what can we do? This assoc is really
2415                                  * HOSED. We probably should send an abort
2416                                  * here.
2417                                  */
2418                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2419                                 continue;
2420                         }
2421                         SCTP_INCR_LADDR_COUNT();
2422                         bzero(laddr, sizeof(*laddr));
2423                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2424                         laddr->ifa = oladdr->ifa;
2425                         atomic_add_int(&laddr->ifa->refcount, 1);
2426                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2427                             sctp_nxt_addr);
2428                         new_inp->laddr_count++;
2429                 }
2430         }
2431         /*
2432          * Now any running timers need to be adjusted since we really don't
2433          * care if they are running or not just blast in the new_inp into
2434          * all of them.
2435          */
2436
2437         stcb->asoc.hb_timer.ep = (void *)new_inp;
2438         stcb->asoc.dack_timer.ep = (void *)new_inp;
2439         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2440         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2441         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2442         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2443         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2444         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2445         /* now what about the nets? */
2446         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2447                 net->pmtu_timer.ep = (void *)new_inp;
2448                 net->rxt_timer.ep = (void *)new_inp;
2449                 net->fr_timer.ep = (void *)new_inp;
2450         }
2451         SCTP_INP_WUNLOCK(new_inp);
2452         SCTP_INP_WUNLOCK(old_inp);
2453 }
2454
2455 static int
2456 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
2457 {
2458         struct sctppcbhead *head;
2459         struct sctp_inpcb *t_inp;
2460         int fnd;
2461
2462         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
2463             sctppcbinfo.hashmark)];
2464         LIST_FOREACH(t_inp, head, sctp_hash) {
2465                 if (t_inp->sctp_lport != lport) {
2466                         continue;
2467                 }
2468                 /* is it in the VRF in question */
2469                 fnd = 0;
2470                 if (t_inp->def_vrf_id == vrf_id)
2471                         fnd = 1;
2472                 if (!fnd)
2473                         continue;
2474
2475                 /* This one is in use. */
2476                 /* check the v6/v4 binding issue */
2477                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2478                     SCTP_IPV6_V6ONLY(t_inp)) {
2479                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2480                                 /* collision in V6 space */
2481                                 return (1);
2482                         } else {
2483                                 /* inp is BOUND_V4 no conflict */
2484                                 continue;
2485                         }
2486                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2487                         /* t_inp is bound v4 and v6, conflict always */
2488                         return (1);
2489                 } else {
2490                         /* t_inp is bound only V4 */
2491                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2492                             SCTP_IPV6_V6ONLY(inp)) {
2493                                 /* no conflict */
2494                                 continue;
2495                         }
2496                         /* else fall through to conflict */
2497                 }
2498                 return (1);
2499         }
2500         return (0);
2501 }
2502
2503
2504
2505 /* sctp_ifap is used to bypass normal local address validation checks */
2506 int
2507 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2508     struct sctp_ifa *sctp_ifap, struct thread *p)
2509 {
2510         /* bind a ep to a socket address */
2511         struct sctppcbhead *head;
2512         struct sctp_inpcb *inp, *inp_tmp;
2513         struct inpcb *ip_inp;
2514         int bindall;
2515         int prison = 0;
2516         uint16_t lport;
2517         int error;
2518         uint32_t vrf_id;
2519
2520         lport = 0;
2521         error = 0;
2522         bindall = 1;
2523         inp = (struct sctp_inpcb *)so->so_pcb;
2524         ip_inp = (struct inpcb *)so->so_pcb;
2525 #ifdef SCTP_DEBUG
2526         if (addr) {
2527                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
2528                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2529                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
2530                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2531         }
2532 #endif
2533         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2534                 /* already did a bind, subsequent binds NOT allowed ! */
2535                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2536                 return (EINVAL);
2537         }
2538 #ifdef INVARIANTS
2539         if (p == NULL)
2540                 panic("null proc/thread");
2541 #endif
2542         if (p && jailed(p->td_ucred)) {
2543                 prison = 1;
2544         }
2545         if (addr != NULL) {
2546                 switch (addr->sa_family) {
2547                 case AF_INET:
2548                         {
2549                                 struct sockaddr_in *sin;
2550
2551                                 /* IPV6_V6ONLY socket? */
2552                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2553                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2554                                         return (EINVAL);
2555                                 }
2556                                 if (addr->sa_len != sizeof(*sin)) {
2557                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2558                                         return (EINVAL);
2559                                 }
2560                                 sin = (struct sockaddr_in *)addr;
2561                                 lport = sin->sin_port;
2562                                 if (prison) {
2563                                         /*
2564                                          * For INADDR_ANY and  LOOPBACK the
2565                                          * prison_ip() call will transmute
2566                                          * the ip address to the proper
2567                                          * value (i.e. the IP address owned
2568                                          * by the jail).
2569                                          */
2570                                         if (prison_ip(p->td_ucred, 0, &sin->sin_addr.s_addr)) {
2571                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2572                                                 return (EINVAL);
2573                                         }
2574                                 }
2575                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2576                                         bindall = 0;
2577                                 }
2578                                 break;
2579                         }
2580 #ifdef INET6
2581                 case AF_INET6:
2582                         {
2583                                 /*
2584                                  * Only for pure IPv6 Address. (No IPv4
2585                                  * Mapped!)
2586                                  */
2587                                 struct sockaddr_in6 *sin6;
2588
2589                                 sin6 = (struct sockaddr_in6 *)addr;
2590
2591                                 if (addr->sa_len != sizeof(*sin6)) {
2592                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2593                                         return (EINVAL);
2594                                 }
2595                                 lport = sin6->sin6_port;
2596                                 /*
2597                                  * Jail checks for IPv6 should go HERE! i.e.
2598                                  * add the prison_ip() equivilant in this
2599                                  * postion to transmute the addresses to the
2600                                  * proper one jailed.
2601                                  */
2602                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2603                                         bindall = 0;
2604                                         /* KAME hack: embed scopeid */
2605                                         if (sa6_embedscope(sin6, ip6_use_defzone) != 0) {
2606                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2607                                                 return (EINVAL);
2608                                         }
2609                                 }
2610                                 /* this must be cleared for ifa_ifwithaddr() */
2611                                 sin6->sin6_scope_id = 0;
2612                                 break;
2613                         }
2614 #endif
2615                 default:
2616                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2617                         return (EAFNOSUPPORT);
2618                 }
2619         }
2620         SCTP_INP_INFO_WLOCK();
2621         SCTP_INP_WLOCK(inp);
2622         /* Setup a vrf_id to be the default for the non-bind-all case. */
2623         vrf_id = inp->def_vrf_id;
2624
2625         /* increase our count due to the unlock we do */
2626         SCTP_INP_INCR_REF(inp);
2627         if (lport) {
2628                 /*
2629                  * Did the caller specify a port? if so we must see if a ep
2630                  * already has this one bound.
2631                  */
2632                 /* got to be root to get at low ports */
2633                 if (ntohs(lport) < IPPORT_RESERVED) {
2634                         if (p && (error =
2635                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2636                             )) {
2637                                 SCTP_INP_DECR_REF(inp);
2638                                 SCTP_INP_WUNLOCK(inp);
2639                                 SCTP_INP_INFO_WUNLOCK();
2640                                 return (error);
2641                         }
2642                 }
2643                 if (p == NULL) {
2644                         SCTP_INP_DECR_REF(inp);
2645                         SCTP_INP_WUNLOCK(inp);
2646                         SCTP_INP_INFO_WUNLOCK();
2647                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2648                         return (error);
2649                 }
2650                 SCTP_INP_WUNLOCK(inp);
2651                 if (bindall) {
2652                         vrf_id = inp->def_vrf_id;
2653                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2654                         if (inp_tmp != NULL) {
2655                                 /*
2656                                  * lock guy returned and lower count note
2657                                  * that we are not bound so inp_tmp should
2658                                  * NEVER be inp. And it is this inp
2659                                  * (inp_tmp) that gets the reference bump,
2660                                  * so we must lower it.
2661                                  */
2662                                 SCTP_INP_DECR_REF(inp_tmp);
2663                                 SCTP_INP_DECR_REF(inp);
2664                                 /* unlock info */
2665                                 SCTP_INP_INFO_WUNLOCK();
2666                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2667                                 return (EADDRINUSE);
2668                         }
2669                 } else {
2670                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2671                         if (inp_tmp != NULL) {
2672                                 /*
2673                                  * lock guy returned and lower count note
2674                                  * that we are not bound so inp_tmp should
2675                                  * NEVER be inp. And it is this inp
2676                                  * (inp_tmp) that gets the reference bump,
2677                                  * so we must lower it.
2678                                  */
2679                                 SCTP_INP_DECR_REF(inp_tmp);
2680                                 SCTP_INP_DECR_REF(inp);
2681                                 /* unlock info */
2682                                 SCTP_INP_INFO_WUNLOCK();
2683                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2684                                 return (EADDRINUSE);
2685                         }
2686                 }
2687                 SCTP_INP_WLOCK(inp);
2688                 if (bindall) {
2689                         /* verify that no lport is not used by a singleton */
2690                         if (sctp_isport_inuse(inp, lport, vrf_id)) {
2691                                 /* Sorry someone already has this one bound */
2692                                 SCTP_INP_DECR_REF(inp);
2693                                 SCTP_INP_WUNLOCK(inp);
2694                                 SCTP_INP_INFO_WUNLOCK();
2695                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2696                                 return (EADDRINUSE);
2697                         }
2698                 }
2699         } else {
2700                 uint16_t first, last, candidate;
2701                 uint16_t count;
2702                 int done;
2703
2704                 if (ip_inp->inp_flags & INP_HIGHPORT) {
2705                         first = ipport_hifirstauto;
2706                         last = ipport_hilastauto;
2707                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2708                         if (p && (error =
2709                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2710                             )) {
2711                                 SCTP_INP_DECR_REF(inp);
2712                                 SCTP_INP_WUNLOCK(inp);
2713                                 SCTP_INP_INFO_WUNLOCK();
2714                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2715                                 return (error);
2716                         }
2717                         first = ipport_lowfirstauto;
2718                         last = ipport_lowlastauto;
2719                 } else {
2720                         first = ipport_firstauto;
2721                         last = ipport_lastauto;
2722                 }
2723                 if (first > last) {
2724                         uint16_t temp;
2725
2726                         temp = first;
2727                         first = last;
2728                         last = temp;
2729                 }
2730                 count = last - first + 1;       /* number of candidates */
2731                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2732
2733                 done = 0;
2734                 while (!done) {
2735                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == 0) {
2736                                 done = 1;
2737                         }
2738                         if (!done) {
2739                                 if (--count == 0) {
2740                                         SCTP_INP_DECR_REF(inp);
2741                                         SCTP_INP_WUNLOCK(inp);
2742                                         SCTP_INP_INFO_WUNLOCK();
2743                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2744                                         return (EADDRINUSE);
2745                                 }
2746                                 if (candidate == last)
2747                                         candidate = first;
2748                                 else
2749                                         candidate = candidate + 1;
2750                         }
2751                 }
2752                 lport = htons(candidate);
2753         }
2754         SCTP_INP_DECR_REF(inp);
2755         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2756             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2757                 /*
2758                  * this really should not happen. The guy did a non-blocking
2759                  * bind and then did a close at the same time.
2760                  */
2761                 SCTP_INP_WUNLOCK(inp);
2762                 SCTP_INP_INFO_WUNLOCK();
2763                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2764                 return (EINVAL);
2765         }
2766         /* ok we look clear to give out this port, so lets setup the binding */
2767         if (bindall) {
2768                 /* binding to all addresses, so just set in the proper flags */
2769                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
2770                 /* set the automatic addr changes from kernel flag */
2771                 if (sctp_auto_asconf == 0) {
2772                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2773                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2774                 } else {
2775                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2776                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2777                 }
2778                 /*
2779                  * set the automatic mobility_base from kernel flag (by
2780                  * micchie)
2781                  */
2782                 if (sctp_mobility_base == 0) {
2783                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
2784                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2785                 } else {
2786                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
2787                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2788                 }
2789                 /*
2790                  * set the automatic mobility_fasthandoff from kernel flag
2791                  * (by micchie)
2792                  */
2793                 if (sctp_mobility_fasthandoff == 0) {
2794                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
2795                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2796                 } else {
2797                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
2798                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2799                 }
2800         } else {
2801                 /*
2802                  * bind specific, make sure flags is off and add a new
2803                  * address structure to the sctp_addr_list inside the ep
2804                  * structure.
2805                  *
2806                  * We will need to allocate one and insert it at the head. The
2807                  * socketopt call can just insert new addresses in there as
2808                  * well. It will also have to do the embed scope kame hack
2809                  * too (before adding).
2810                  */
2811                 struct sctp_ifa *ifa;
2812                 struct sockaddr_storage store_sa;
2813
2814                 memset(&store_sa, 0, sizeof(store_sa));
2815                 if (addr->sa_family == AF_INET) {
2816                         struct sockaddr_in *sin;
2817
2818                         sin = (struct sockaddr_in *)&store_sa;
2819                         memcpy(sin, addr, sizeof(struct sockaddr_in));
2820                         sin->sin_port = 0;
2821                 } else if (addr->sa_family == AF_INET6) {
2822                         struct sockaddr_in6 *sin6;
2823
2824                         sin6 = (struct sockaddr_in6 *)&store_sa;
2825                         memcpy(sin6, addr, sizeof(struct sockaddr_in6));
2826                         sin6->sin6_port = 0;
2827                 }
2828                 /*
2829                  * first find the interface with the bound address need to
2830                  * zero out the port to find the address! yuck! can't do
2831                  * this earlier since need port for sctp_pcb_findep()
2832                  */
2833                 if (sctp_ifap != NULL)
2834                         ifa = sctp_ifap;
2835                 else {
2836                         /*
2837                          * Note for BSD we hit here always other O/S's will
2838                          * pass things in via the sctp_ifap argument
2839                          * (Panda).
2840                          */
2841                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
2842                             vrf_id, SCTP_ADDR_NOT_LOCKED);
2843                 }
2844                 if (ifa == NULL) {
2845                         /* Can't find an interface with that address */
2846                         SCTP_INP_WUNLOCK(inp);
2847                         SCTP_INP_INFO_WUNLOCK();
2848                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
2849                         return (EADDRNOTAVAIL);
2850                 }
2851                 if (addr->sa_family == AF_INET6) {
2852                         /* GAK, more FIXME IFA lock? */
2853                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2854                                 /* Can't bind a non-existent addr. */
2855                                 SCTP_INP_WUNLOCK(inp);
2856                                 SCTP_INP_INFO_WUNLOCK();
2857                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2858                                 return (EINVAL);
2859                         }
2860                 }
2861                 /* we're not bound all */
2862                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
2863                 /* allow bindx() to send ASCONF's for binding changes */
2864                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2865                 /* clear automatic addr changes from kernel flag */
2866                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2867
2868                 /* add this address to the endpoint list */
2869                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
2870                 if (error != 0) {
2871                         SCTP_INP_WUNLOCK(inp);
2872                         SCTP_INP_INFO_WUNLOCK();
2873                         return (error);
2874                 }
2875                 inp->laddr_count++;
2876         }
2877         /* find the bucket */
2878         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
2879             sctppcbinfo.hashmark)];
2880         /* put it in the bucket */
2881         LIST_INSERT_HEAD(head, inp, sctp_hash);
2882         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d\n",
2883             head, ntohs(lport));
2884         /* set in the port */
2885         inp->sctp_lport = lport;
2886
2887         /* turn off just the unbound flag */
2888         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2889         SCTP_INP_WUNLOCK(inp);
2890         SCTP_INP_INFO_WUNLOCK();
2891         return (0);
2892 }
2893
2894
2895 static void
2896 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next)
2897 {
2898         struct sctp_iterator *it;
2899
2900         /*
2901          * We enter with the only the ITERATOR_LOCK in place and a write
2902          * lock on the inp_info stuff.
2903          */
2904
2905         /*
2906          * Go through all iterators, we must do this since it is possible
2907          * that some iterator does NOT have the lock, but is waiting for it.
2908          * And the one that had the lock has either moved in the last
2909          * iteration or we just cleared it above. We need to find all of
2910          * those guys. The list of iterators should never be very big
2911          * though.
2912          */
2913         TAILQ_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) {
2914                 if (it == inp->inp_starting_point_for_iterator)
2915                         /* skip this guy, he's special */
2916                         continue;
2917                 if (it->inp == inp) {
2918                         /*
2919                          * This is tricky and we DON'T lock the iterator.
2920                          * Reason is he's running but waiting for me since
2921                          * inp->inp_starting_point_for_iterator has the lock
2922                          * on me (the guy above we skipped). This tells us
2923                          * its is not running but waiting for
2924                          * inp->inp_starting_point_for_iterator to be
2925                          * released by the guy that does have our INP in a
2926                          * lock.
2927                          */
2928                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2929                                 it->inp = NULL;
2930                                 it->stcb = NULL;
2931                         } else {
2932                                 /* set him up to do the next guy not me */
2933                                 it->inp = inp_next;
2934                                 it->stcb = NULL;
2935                         }
2936                 }
2937         }
2938         it = inp->inp_starting_point_for_iterator;
2939         if (it) {
2940                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2941                         it->inp = NULL;
2942                 } else {
2943                         it->inp = inp_next;
2944                 }
2945                 it->stcb = NULL;
2946         }
2947 }
2948
2949 /* release sctp_inpcb unbind the port */
2950 void
2951 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
2952 {
2953         /*
2954          * Here we free a endpoint. We must find it (if it is in the Hash
2955          * table) and remove it from there. Then we must also find it in the
2956          * overall list and remove it from there. After all removals are
2957          * complete then any timer has to be stopped. Then start the actual
2958          * freeing. a) Any local lists. b) Any associations. c) The hash of
2959          * all associations. d) finally the ep itself.
2960          */
2961         struct sctp_pcb *m;
2962         struct sctp_inpcb *inp_save;
2963         struct sctp_tcb *asoc, *nasoc;
2964         struct sctp_laddr *laddr, *nladdr;
2965         struct inpcb *ip_pcb;
2966         struct socket *so;
2967
2968         struct sctp_queued_to_read *sq;
2969
2970
2971         int cnt;
2972         sctp_sharedkey_t *shared_key;
2973
2974
2975 #ifdef SCTP_LOG_CLOSING
2976         sctp_log_closing(inp, NULL, 0);
2977 #endif
2978         SCTP_ITERATOR_LOCK();
2979         so = inp->sctp_socket;
2980         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2981                 /* been here before.. eeks.. get out of here */
2982                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
2983                 SCTP_ITERATOR_UNLOCK();
2984 #ifdef SCTP_LOG_CLOSING
2985                 sctp_log_closing(inp, NULL, 1);
2986 #endif
2987                 return;
2988         }
2989         SCTP_ASOC_CREATE_LOCK(inp);
2990         SCTP_INP_INFO_WLOCK();
2991
2992         SCTP_INP_WLOCK(inp);
2993         /* First time through we have the socket lock, after that no more. */
2994         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
2995                 /*
2996                  * Once we are in we can remove the flag from = 1 is only
2997                  * passed from the actual closing routines that are called
2998                  * via the sockets layer.
2999                  */
3000                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3001                 /* socket is gone, so no more wakeups allowed */
3002                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3003                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3004                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3005         }
3006         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3007             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3008
3009         if (inp->control) {
3010                 sctp_m_freem(inp->control);
3011                 inp->control = NULL;
3012         }
3013         if (inp->pkt) {
3014                 sctp_m_freem(inp->pkt);
3015                 inp->pkt = NULL;
3016         }
3017         m = &inp->sctp_ep;
3018         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3019                                          * here but I will be nice :> (i.e.
3020                                          * ip_pcb = ep;) */
3021         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3022                 int cnt_in_sd;
3023
3024                 cnt_in_sd = 0;
3025                 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
3026                     asoc = nasoc) {
3027                         SCTP_TCB_LOCK(asoc);
3028                         nasoc = LIST_NEXT(asoc, sctp_tcblist);
3029                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3030                                 /* Skip guys being freed */
3031                                 /* asoc->sctp_socket = NULL; FIXME MT */
3032                                 cnt_in_sd++;
3033                                 SCTP_TCB_UNLOCK(asoc);
3034                                 continue;
3035                         }
3036                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3037                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
3038                                 /*
3039                                  * If we have data in queue, we don't want
3040                                  * to just free since the app may have done,
3041                                  * send()/close or connect/send/close. And
3042                                  * it wants the data to get across first.
3043                                  */
3044                                 /* Just abandon things in the front states */
3045                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3046                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3047                                         cnt_in_sd++;
3048                                 }
3049                                 continue;
3050                         }
3051                         /* Disconnect the socket please */
3052                         asoc->sctp_socket = NULL;
3053                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3054                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3055                             (asoc->asoc.control_pdapi) ||
3056                             (asoc->asoc.size_on_all_streams > 0) ||
3057                             (so && (so->so_rcv.sb_cc > 0))
3058                             ) {
3059                                 /* Left with Data unread */
3060                                 struct mbuf *op_err;
3061
3062                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3063                                     0, M_DONTWAIT, 1, MT_DATA);
3064                                 if (op_err) {
3065                                         /* Fill in the user initiated abort */
3066                                         struct sctp_paramhdr *ph;
3067                                         uint32_t *ippp;
3068
3069                                         SCTP_BUF_LEN(op_err) =
3070                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
3071                                         ph = mtod(op_err,
3072                                             struct sctp_paramhdr *);
3073                                         ph->param_type = htons(
3074                                             SCTP_CAUSE_USER_INITIATED_ABT);
3075                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
3076                                         ippp = (uint32_t *) (ph + 1);
3077                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
3078                                 }
3079                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3080 #if defined(SCTP_PANIC_ON_ABORT)
3081                                 panic("inpcb_free does an abort");
3082 #endif
3083                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3084                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3085                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3086                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3087                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3088                                 }
3089                                 if (sctp_free_assoc(inp, asoc,
3090                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3091                                         cnt_in_sd++;
3092                                 }
3093                                 continue;
3094                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3095                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3096                                     (asoc->asoc.stream_queue_cnt == 0)
3097                             ) {
3098                                 if (asoc->asoc.locked_on_sending) {
3099                                         goto abort_anyway;
3100                                 }
3101                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3102                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3103                                         /*
3104                                          * there is nothing queued to send,
3105                                          * so I send shutdown
3106                                          */
3107                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
3108                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3109                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3110                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3111                                         }
3112                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3113                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3114                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3115                                             asoc->asoc.primary_destination);
3116                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3117                                             asoc->asoc.primary_destination);
3118                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3119                                 }
3120                         } else {
3121                                 /* mark into shutdown pending */
3122                                 struct sctp_stream_queue_pending *sp;
3123
3124                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3125                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3126                                     asoc->asoc.primary_destination);
3127                                 if (asoc->asoc.locked_on_sending) {
3128                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3129                                             sctp_streamhead);
3130                                         if (sp == NULL) {
3131                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3132                                                     asoc->asoc.locked_on_sending,
3133                                                     asoc->asoc.locked_on_sending->stream_no);
3134                                         } else {
3135                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3136                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3137                                         }
3138                                 }
3139                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3140                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3141                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3142                                         struct mbuf *op_err;
3143
3144                         abort_anyway:
3145                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3146                                             0, M_DONTWAIT, 1, MT_DATA);
3147                                         if (op_err) {
3148                                                 /*
3149                                                  * Fill in the user
3150                                                  * initiated abort
3151                                                  */
3152                                                 struct sctp_paramhdr *ph;
3153                                                 uint32_t *ippp;
3154
3155                                                 SCTP_BUF_LEN(op_err) =
3156                                                     (sizeof(struct sctp_paramhdr) +
3157                                                     sizeof(uint32_t));
3158                                                 ph = mtod(op_err,
3159                                                     struct sctp_paramhdr *);
3160                                                 ph->param_type = htons(
3161                                                     SCTP_CAUSE_USER_INITIATED_ABT);
3162                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3163                                                 ippp = (uint32_t *) (ph + 1);
3164                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
3165                                         }
3166                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3167 #if defined(SCTP_PANIC_ON_ABORT)
3168                                         panic("inpcb_free does an abort");
3169 #endif
3170
3171                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3172                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3173                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3174                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3175                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3176                                         }
3177                                         if (sctp_free_assoc(inp, asoc,
3178                                             SCTP_PCBFREE_NOFORCE,
3179                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3180                                                 cnt_in_sd++;
3181                                         }
3182                                         continue;
3183                                 } else {
3184                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3185                                 }
3186                         }
3187                         cnt_in_sd++;
3188                         SCTP_TCB_UNLOCK(asoc);
3189                 }
3190                 /* now is there some left in our SHUTDOWN state? */
3191                 if (cnt_in_sd) {
3192                         SCTP_INP_WUNLOCK(inp);
3193                         SCTP_ASOC_CREATE_UNLOCK(inp);
3194                         SCTP_INP_INFO_WUNLOCK();
3195                         SCTP_ITERATOR_UNLOCK();
3196 #ifdef SCTP_LOG_CLOSING
3197                         sctp_log_closing(inp, NULL, 2);
3198 #endif
3199                         return;
3200                 }
3201         }
3202         inp->sctp_socket = NULL;
3203         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3204             SCTP_PCB_FLAGS_UNBOUND) {
3205                 /*
3206                  * ok, this guy has been bound. It's port is somewhere in
3207                  * the sctppcbinfo hash table. Remove it!
3208                  */
3209                 LIST_REMOVE(inp, sctp_hash);
3210                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3211         }
3212         /*
3213          * If there is a timer running to kill us, forget it, since it may
3214          * have a contest on the INP lock.. which would cause us to die ...
3215          */
3216         cnt = 0;
3217         for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
3218             asoc = nasoc) {
3219                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
3220                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3221                         cnt++;
3222                         continue;
3223                 }
3224                 /* Free associations that are NOT killing us */
3225                 SCTP_TCB_LOCK(asoc);
3226                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3227                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3228                         struct mbuf *op_err;
3229                         uint32_t *ippp;
3230
3231                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3232                             0, M_DONTWAIT, 1, MT_DATA);
3233                         if (op_err) {
3234                                 /* Fill in the user initiated abort */
3235                                 struct sctp_paramhdr *ph;
3236
3237                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
3238                                     sizeof(uint32_t));
3239                                 ph = mtod(op_err, struct sctp_paramhdr *);
3240                                 ph->param_type = htons(
3241                                     SCTP_CAUSE_USER_INITIATED_ABT);
3242                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3243                                 ippp = (uint32_t *) (ph + 1);
3244                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
3245
3246                         }
3247                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3248 #if defined(SCTP_PANIC_ON_ABORT)
3249                         panic("inpcb_free does an abort");
3250 #endif
3251                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3252                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3253                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3254                         cnt++;
3255                         SCTP_TCB_UNLOCK(asoc);
3256                         continue;
3257                 }
3258                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3259                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3260                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3261                 }
3262                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3263                         cnt++;
3264                 }
3265         }
3266         if (cnt) {
3267                 /* Ok we have someone out there that will kill us */
3268                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3269                 SCTP_INP_WUNLOCK(inp);
3270                 SCTP_ASOC_CREATE_UNLOCK(inp);
3271                 SCTP_INP_INFO_WUNLOCK();
3272                 SCTP_ITERATOR_UNLOCK();
3273 #ifdef SCTP_LOG_CLOSING
3274                 sctp_log_closing(inp, NULL, 3);
3275 #endif
3276                 return;
3277         }
3278         if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3279                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3280                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3281                 SCTP_INP_WUNLOCK(inp);
3282                 SCTP_ASOC_CREATE_UNLOCK(inp);
3283                 SCTP_INP_INFO_WUNLOCK();
3284                 SCTP_ITERATOR_UNLOCK();
3285 #ifdef SCTP_LOG_CLOSING
3286                 sctp_log_closing(inp, NULL, 4);
3287 #endif
3288                 return;
3289         }
3290         (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3291         inp->sctp_ep.signature_change.type = 0;
3292         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3293
3294 #ifdef SCTP_LOG_CLOSING
3295         sctp_log_closing(inp, NULL, 5);
3296 #endif
3297
3298         (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3299         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE;
3300         /* Clear the read queue */
3301         /* sa_ignore FREED_MEMORY */
3302         while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) {
3303                 /* Its only abandoned if it had data left */
3304                 if (sq->length)
3305                         SCTP_STAT_INCR(sctps_left_abandon);
3306
3307                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3308                 sctp_free_remote_addr(sq->whoFrom);
3309                 if (so)
3310                         so->so_rcv.sb_cc -= sq->length;
3311                 if (sq->data) {
3312                         sctp_m_freem(sq->data);
3313                         sq->data = NULL;
3314                 }
3315                 /*
3316                  * no need to free the net count, since at this point all
3317                  * assoc's are gone.
3318                  */
3319                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq);
3320                 SCTP_DECR_READQ_COUNT();
3321         }
3322         /* Now the sctp_pcb things */
3323         /*
3324          * free each asoc if it is not already closed/free. we can't use the
3325          * macro here since le_next will get freed as part of the
3326          * sctp_free_assoc() call.
3327          */
3328         cnt = 0;
3329         if (so) {
3330 #ifdef IPSEC
3331                 ipsec4_delete_pcbpolicy(ip_pcb);
3332 #endif                          /* IPSEC */
3333
3334                 /* Unlocks not needed since the socket is gone now */
3335         }
3336         if (ip_pcb->inp_options) {
3337                 (void)sctp_m_free(ip_pcb->inp_options);
3338                 ip_pcb->inp_options = 0;
3339         }
3340         if (ip_pcb->inp_moptions) {
3341                 inp_freemoptions(ip_pcb->inp_moptions);
3342                 ip_pcb->inp_moptions = 0;
3343         }
3344 #ifdef INET6
3345         if (ip_pcb->inp_vflag & INP_IPV6) {
3346                 struct in6pcb *in6p;
3347
3348                 in6p = (struct in6pcb *)inp;
3349                 ip6_freepcbopts(in6p->in6p_outputopts);
3350         }
3351 #endif                          /* INET6 */
3352         ip_pcb->inp_vflag = 0;
3353         /* free up authentication fields */
3354         if (inp->sctp_ep.local_auth_chunks != NULL)
3355                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3356         if (inp->sctp_ep.local_hmacs != NULL)
3357                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3358
3359         shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
3360         while (shared_key) {
3361                 LIST_REMOVE(shared_key, next);
3362                 sctp_free_sharedkey(shared_key);
3363                 /* sa_ignore FREED_MEMORY */
3364                 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
3365         }
3366
3367         inp_save = LIST_NEXT(inp, sctp_list);
3368         LIST_REMOVE(inp, sctp_list);
3369
3370         /* fix any iterators only after out of the list */
3371         sctp_iterator_inp_being_freed(inp, inp_save);
3372         /*
3373          * if we have an address list the following will free the list of
3374          * ifaddr's that are set into this ep. Again macro limitations here,
3375          * since the LIST_FOREACH could be a bad idea.
3376          */
3377         for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
3378             laddr = nladdr) {
3379                 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
3380                 sctp_remove_laddr(laddr);
3381         }
3382
3383 #ifdef SCTP_TRACK_FREED_ASOCS
3384         /* TEMP CODE */
3385         for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL;
3386             asoc = nasoc) {
3387                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
3388                 LIST_REMOVE(asoc, sctp_tcblist);
3389                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, asoc);
3390                 SCTP_DECR_ASOC_COUNT();
3391         }
3392         /* *** END TEMP CODE *** */
3393 #endif
3394         /* Now lets see about freeing the EP hash table. */
3395         if (inp->sctp_tcbhash != NULL) {
3396                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3397                 inp->sctp_tcbhash = NULL;
3398         }
3399         /* Now we must put the ep memory back into the zone pool */
3400         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3401         SCTP_INP_LOCK_DESTROY(inp);
3402         SCTP_INP_READ_DESTROY(inp);
3403         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3404         SCTP_INP_INFO_WUNLOCK();
3405         SCTP_ITERATOR_UNLOCK();
3406         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
3407         SCTP_DECR_EP_COUNT();
3408 }
3409
3410
3411 struct sctp_nets *
3412 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3413 {
3414         struct sctp_nets *net;
3415
3416         /* locate the address */
3417         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3418                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3419                         return (net);
3420         }
3421         return (NULL);
3422 }
3423
3424
3425 int
3426 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3427 {
3428         struct sctp_ifa *sctp_ifa;
3429
3430         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3431         if (sctp_ifa) {
3432                 return (1);
3433         } else {
3434                 return (0);
3435         }
3436 }
3437
3438 /*
3439  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3440  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3441  * stats of stuff.
3442  */
3443 int
3444 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3445     int set_scope, int from)
3446 {
3447         /*
3448          * The following is redundant to the same lines in the
3449          * sctp_aloc_assoc() but is needed since other's call the add
3450          * address function
3451          */
3452         struct sctp_nets *net, *netfirst;
3453         int addr_inscope;
3454
3455         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3456             from);
3457         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3458
3459         netfirst = sctp_findnet(stcb, newaddr);
3460         if (netfirst) {
3461                 /*
3462                  * Lie and return ok, we don't want to make the association
3463                  * go away for this behavior. It will happen in the TCP
3464                  * model in a connected socket. It does not reach the hash
3465                  * table until after the association is built so it can't be
3466                  * found. Mark as reachable, since the initial creation will
3467                  * have been cleared and the NOT_IN_ASSOC flag will have
3468                  * been added... and we don't want to end up removing it
3469                  * back out.
3470                  */
3471                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3472                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3473                             SCTP_ADDR_UNCONFIRMED);
3474                 } else {
3475                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3476                 }
3477
3478                 return (0);
3479         }
3480         addr_inscope = 1;
3481         if (newaddr->sa_family == AF_INET) {
3482                 struct sockaddr_in *sin;
3483
3484                 sin = (struct sockaddr_in *)newaddr;
3485                 if (sin->sin_addr.s_addr == 0) {
3486                         /* Invalid address */
3487                         return (-1);
3488                 }
3489                 /* zero out the bzero area */
3490                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3491
3492                 /* assure len is set */
3493                 sin->sin_len = sizeof(struct sockaddr_in);
3494                 if (set_scope) {
3495 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3496                         stcb->ipv4_local_scope = 1;
3497 #else
3498                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3499                                 stcb->asoc.ipv4_local_scope = 1;
3500                         }
3501 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3502                 } else {
3503                         /* Validate the address is in scope */
3504                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3505                             (stcb->asoc.ipv4_local_scope == 0)) {
3506                                 addr_inscope = 0;
3507                         }
3508                 }
3509         } else if (newaddr->sa_family == AF_INET6) {
3510                 struct sockaddr_in6 *sin6;
3511
3512                 sin6 = (struct sockaddr_in6 *)newaddr;
3513                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3514                         /* Invalid address */
3515                         return (-1);
3516                 }
3517                 /* assure len is set */
3518                 sin6->sin6_len = sizeof(struct sockaddr_in6);
3519                 if (set_scope) {
3520                         if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3521                                 stcb->asoc.loopback_scope = 1;
3522                                 stcb->asoc.local_scope = 0;
3523                                 stcb->asoc.ipv4_local_scope = 1;
3524                                 stcb->asoc.site_scope = 1;
3525                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3526                                 /*
3527                                  * If the new destination is a LINK_LOCAL we
3528                                  * must have common site scope. Don't set
3529                                  * the local scope since we may not share
3530                                  * all links, only loopback can do this.
3531                                  * Links on the local network would also be
3532                                  * on our private network for v4 too.
3533                                  */
3534                                 stcb->asoc.ipv4_local_scope = 1;
3535                                 stcb->asoc.site_scope = 1;
3536                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3537                                 /*
3538                                  * If the new destination is SITE_LOCAL then
3539                                  * we must have site scope in common.
3540                                  */
3541                                 stcb->asoc.site_scope = 1;
3542                         }
3543                 } else {
3544                         /* Validate the address is in scope */
3545                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3546                             (stcb->asoc.loopback_scope == 0)) {
3547                                 addr_inscope = 0;
3548                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3549                             (stcb->asoc.local_scope == 0)) {
3550                                 addr_inscope = 0;
3551                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3552                             (stcb->asoc.site_scope == 0)) {
3553                                 addr_inscope = 0;
3554                         }
3555                 }
3556         } else {
3557                 /* not supported family type */
3558                 return (-1);
3559         }
3560         net = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net, struct sctp_nets);
3561         if (net == NULL) {
3562                 return (-1);
3563         }
3564         SCTP_INCR_RADDR_COUNT();
3565         bzero(net, sizeof(*net));
3566         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3567         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3568         if (newaddr->sa_family == AF_INET) {
3569                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3570         } else if (newaddr->sa_family == AF_INET6) {
3571                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3572         }
3573         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3574         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3575                 stcb->asoc.loopback_scope = 1;
3576                 stcb->asoc.ipv4_local_scope = 1;
3577                 stcb->asoc.local_scope = 0;
3578                 stcb->asoc.site_scope = 1;
3579                 addr_inscope = 1;
3580         }
3581         net->failure_threshold = stcb->asoc.def_net_failure;
3582         if (addr_inscope == 0) {
3583                 net->dest_state = (SCTP_ADDR_REACHABLE |
3584                     SCTP_ADDR_OUT_OF_SCOPE);
3585         } else {
3586                 if (from == SCTP_ADDR_IS_CONFIRMED)
3587                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3588                         net->dest_state = SCTP_ADDR_REACHABLE;
3589                 else
3590                         net->dest_state = SCTP_ADDR_REACHABLE |
3591                             SCTP_ADDR_UNCONFIRMED;
3592         }
3593         /*
3594          * We set this to 0, the timer code knows that this means its an
3595          * initial value
3596          */
3597         net->RTO = 0;
3598         net->RTO_measured = 0;
3599         stcb->asoc.numnets++;
3600         *(&net->ref_count) = 1;
3601         net->tos_flowlabel = 0;
3602 #ifdef INET
3603         if (newaddr->sa_family == AF_INET)
3604                 net->tos_flowlabel = stcb->asoc.default_tos;
3605 #endif
3606 #ifdef INET6
3607         if (newaddr->sa_family == AF_INET6)
3608                 net->tos_flowlabel = stcb->asoc.default_flowlabel;
3609 #endif
3610         /* Init the timer structure */
3611         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3612         SCTP_OS_TIMER_INIT(&net->fr_timer.timer);
3613         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3614
3615         /* Now generate a route for this guy */
3616 #ifdef INET6
3617         /* KAME hack: embed scopeid */
3618         if (newaddr->sa_family == AF_INET6) {
3619                 struct sockaddr_in6 *sin6;
3620
3621                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3622                 (void)sa6_embedscope(sin6, ip6_use_defzone);
3623                 sin6->sin6_scope_id = 0;
3624         }
3625 #endif
3626         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3627
3628 #ifdef INET6
3629         if (newaddr->sa_family == AF_INET6) {
3630                 struct sockaddr_in6 *sin6;
3631
3632                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3633                 (void)sa6_recoverscope(sin6);
3634         }
3635 #endif
3636         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3637                 /* Get source address */
3638                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3639                     stcb,
3640                     (sctp_route_t *) & net->ro,
3641                     net,
3642                     0,
3643                     stcb->asoc.vrf_id);
3644                 /* Now get the interface MTU */
3645                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3646                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3647                 } else {
3648                         net->mtu = 0;
3649                 }
3650 #ifdef SCTP_PRINT_FOR_B_AND_M
3651                 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu);
3652 #endif
3653                 if (net->mtu == 0) {
3654                         /* Huh ?? */
3655                         net->mtu = SCTP_DEFAULT_MTU;
3656                 } else {
3657                         uint32_t rmtu;
3658
3659                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3660 #ifdef SCTP_PRINT_FOR_B_AND_M
3661                         SCTP_PRINTF("The route mtu is %d\n", rmtu);
3662 #endif
3663                         if (rmtu == 0) {
3664                                 /*
3665                                  * Start things off to match mtu of
3666                                  * interface please.
3667                                  */
3668                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3669                                     net->ro.ro_rt, net->mtu);
3670                         } else {
3671                                 /*
3672                                  * we take the route mtu over the interface,
3673                                  * since the route may be leading out the
3674                                  * loopback, or a different interface.
3675                                  */
3676                                 net->mtu = rmtu;
3677                         }
3678                 }
3679                 if (from == SCTP_ALLOC_ASOC) {
3680 #ifdef SCTP_PRINT_FOR_B_AND_M
3681                         SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu);
3682 #endif
3683                         stcb->asoc.smallest_mtu = net->mtu;
3684                 }
3685         } else {
3686                 net->mtu = stcb->asoc.smallest_mtu;
3687         }
3688         if (stcb->asoc.smallest_mtu > net->mtu) {
3689 #ifdef SCTP_PRINT_FOR_B_AND_M
3690                 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n",
3691                     net->mtu, stcb->asoc.smallest_mtu);
3692 #endif
3693                 stcb->asoc.smallest_mtu = net->mtu;
3694         }
3695         /* JRS - Use the congestion control given in the CC module */
3696         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
3697
3698         /*
3699          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3700          * of assoc (2005/06/27, iyengar@cis.udel.edu)
3701          */
3702         net->find_pseudo_cumack = 1;
3703         net->find_rtx_pseudo_cumack = 1;
3704         net->src_addr_selected = 0;
3705         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3706         if (net->ro.ro_rt == NULL) {
3707                 /* Since we have no route put it at the back */
3708                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3709         } else if (netfirst == NULL) {
3710                 /* We are the first one in the pool. */
3711                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3712         } else if (netfirst->ro.ro_rt == NULL) {
3713                 /*
3714                  * First one has NO route. Place this one ahead of the first
3715                  * one.
3716                  */
3717                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3718         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
3719                 /*
3720                  * This one has a different interface than the one at the
3721                  * top of the list. Place it ahead.
3722                  */
3723                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3724         } else {
3725                 /*
3726                  * Ok we have the same interface as the first one. Move
3727                  * forward until we find either a) one with a NULL route...
3728                  * insert ahead of that b) one with a different ifp.. insert
3729                  * after that. c) end of the list.. insert at the tail.
3730                  */
3731                 struct sctp_nets *netlook;
3732
3733                 do {
3734                         netlook = TAILQ_NEXT(netfirst, sctp_next);
3735                         if (netlook == NULL) {
3736                                 /* End of the list */
3737                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3738                                 break;
3739                         } else if (netlook->ro.ro_rt == NULL) {
3740                                 /* next one has NO route */
3741                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
3742                                 break;
3743                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
3744                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
3745                                     net, sctp_next);
3746                                 break;
3747                         }
3748                         /* Shift forward */
3749                         netfirst = netlook;
3750                 } while (netlook != NULL);
3751         }
3752
3753         /* got to have a primary set */
3754         if (stcb->asoc.primary_destination == 0) {
3755                 stcb->asoc.primary_destination = net;
3756         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
3757                     (net->ro.ro_rt) &&
3758             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
3759                 /* No route to current primary adopt new primary */
3760                 stcb->asoc.primary_destination = net;
3761         }
3762         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
3763             net);
3764         /* Validate primary is first */
3765         net = TAILQ_FIRST(&stcb->asoc.nets);
3766         if ((net != stcb->asoc.primary_destination) &&
3767             (stcb->asoc.primary_destination)) {
3768                 /*
3769                  * first one on the list is NOT the primary sctp_cmpaddr()
3770                  * is much more efficent if the primary is the first on the
3771                  * list, make it so.
3772                  */
3773                 TAILQ_REMOVE(&stcb->asoc.nets,
3774                     stcb->asoc.primary_destination, sctp_next);
3775                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
3776                     stcb->asoc.primary_destination, sctp_next);
3777         }
3778         return (0);
3779 }
3780
3781
3782 /*
3783  * allocate an association and add it to the endpoint. The caller must be
3784  * careful to add all additional addresses once they are know right away or
3785  * else the assoc will be may experience a blackout scenario.
3786  */
3787 struct sctp_tcb *
3788 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
3789     int for_a_init, int *error, uint32_t override_tag, uint32_t vrf_id,
3790     struct thread *p
3791 )
3792 {
3793         /* note the p argument is only valid in unbound sockets */
3794
3795         struct sctp_tcb *stcb;
3796         struct sctp_association *asoc;
3797         struct sctpasochead *head;
3798         uint16_t rport;
3799         int err;
3800
3801         /*
3802          * Assumption made here: Caller has done a
3803          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
3804          * address does not exist already.
3805          */
3806         if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) {
3807                 /* Hit max assoc, sorry no more */
3808                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
3809                 *error = ENOBUFS;
3810                 return (NULL);
3811         }
3812         if (firstaddr == NULL) {
3813                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3814                 *error = EINVAL;
3815                 return (NULL);
3816         }
3817         SCTP_INP_RLOCK(inp);
3818         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
3819                 /*
3820                  * If its in the TCP pool, its NOT allowed to create an
3821                  * association. The parent listener needs to call
3822                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
3823                  * off, or connected one does this.. its an error.
3824                  */
3825                 SCTP_INP_RUNLOCK(inp);
3826                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3827                 *error = EINVAL;
3828                 return (NULL);
3829         }
3830         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
3831 #ifdef SCTP_DEBUG
3832         if (firstaddr) {
3833                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
3834                 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
3835                     ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
3836         } else {
3837                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
3838         }
3839 #endif                          /* SCTP_DEBUG */
3840         if (firstaddr->sa_family == AF_INET) {
3841                 struct sockaddr_in *sin;
3842
3843                 sin = (struct sockaddr_in *)firstaddr;
3844                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
3845                         /* Invalid address */
3846                         SCTP_INP_RUNLOCK(inp);
3847                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3848                         *error = EINVAL;
3849                         return (NULL);
3850                 }
3851                 rport = sin->sin_port;
3852         } else if (firstaddr->sa_family == AF_INET6) {
3853                 struct sockaddr_in6 *sin6;
3854
3855                 sin6 = (struct sockaddr_in6 *)firstaddr;
3856                 if ((sin6->sin6_port == 0) ||
3857                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
3858                         /* Invalid address */
3859                         SCTP_INP_RUNLOCK(inp);
3860                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3861                         *error = EINVAL;
3862                         return (NULL);
3863                 }
3864                 rport = sin6->sin6_port;
3865         } else {
3866                 /* not supported family type */
3867                 SCTP_INP_RUNLOCK(inp);
3868                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3869                 *error = EINVAL;
3870                 return (NULL);
3871         }
3872         SCTP_INP_RUNLOCK(inp);
3873         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
3874                 /*
3875                  * If you have not performed a bind, then we need to do the
3876                  * ephemerial bind for you.
3877                  */
3878                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
3879                     (struct sockaddr *)NULL,
3880                     (struct sctp_ifa *)NULL,
3881                     p
3882                     ))) {
3883                         /* bind error, probably perm */
3884                         *error = err;
3885                         return (NULL);
3886                 }
3887         }
3888         stcb = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc, struct sctp_tcb);
3889         if (stcb == NULL) {
3890                 /* out of memory? */
3891                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
3892                 *error = ENOMEM;
3893                 return (NULL);
3894         }
3895         SCTP_INCR_ASOC_COUNT();
3896
3897         bzero(stcb, sizeof(*stcb));
3898         asoc = &stcb->asoc;
3899         SCTP_TCB_LOCK_INIT(stcb);
3900         SCTP_TCB_SEND_LOCK_INIT(stcb);
3901         /* setup back pointer's */
3902         stcb->sctp_ep = inp;
3903         stcb->sctp_socket = inp->sctp_socket;
3904         if ((err = sctp_init_asoc(inp, stcb, for_a_init, override_tag, vrf_id))) {
3905                 /* failed */
3906                 SCTP_TCB_LOCK_DESTROY(stcb);
3907                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3908                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3909                 SCTP_DECR_ASOC_COUNT();
3910                 *error = err;
3911                 return (NULL);
3912         }
3913         /* and the port */
3914         stcb->rport = rport;
3915         SCTP_INP_INFO_WLOCK();
3916         SCTP_INP_WLOCK(inp);
3917         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3918                 /* inpcb freed while alloc going on */
3919                 SCTP_TCB_LOCK_DESTROY(stcb);
3920                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3921                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3922                 SCTP_INP_WUNLOCK(inp);
3923                 SCTP_INP_INFO_WUNLOCK();
3924                 SCTP_DECR_ASOC_COUNT();
3925                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3926                 *error = EINVAL;
3927                 return (NULL);
3928         }
3929         SCTP_TCB_LOCK(stcb);
3930
3931         /* now that my_vtag is set, add it to the hash */
3932         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
3933             sctppcbinfo.hashasocmark)];
3934         /* put it in the bucket in the vtag hash of assoc's for the system */
3935         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
3936         sctp_delete_from_timewait(stcb->asoc.my_vtag);
3937
3938         SCTP_INP_INFO_WUNLOCK();
3939
3940         if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
3941                 /* failure.. memory error? */
3942                 if (asoc->strmout) {
3943                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
3944                         asoc->strmout = NULL;
3945                 }
3946                 if (asoc->mapping_array) {
3947                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
3948                         asoc->mapping_array = NULL;
3949                 }
3950                 SCTP_DECR_ASOC_COUNT();
3951                 SCTP_TCB_LOCK_DESTROY(stcb);
3952                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3953                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3954                 SCTP_INP_WUNLOCK(inp);
3955                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
3956                 *error = ENOBUFS;
3957                 return (NULL);
3958         }
3959         /* Init all the timers */
3960         SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer);
3961         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
3962         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
3963         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
3964         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
3965         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
3966         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
3967         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
3968
3969         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
3970         /* now file the port under the hash as well */
3971         if (inp->sctp_tcbhash != NULL) {
3972                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
3973                     inp->sctp_hashmark)];
3974                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
3975         }
3976         SCTP_INP_WUNLOCK(inp);
3977         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
3978         return (stcb);
3979 }
3980
3981
3982 void
3983 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
3984 {
3985         struct sctp_association *asoc;
3986
3987         asoc = &stcb->asoc;
3988         asoc->numnets--;
3989         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3990         if (net == asoc->primary_destination) {
3991                 /* Reset primary */
3992                 struct sctp_nets *lnet;
3993
3994                 lnet = TAILQ_FIRST(&asoc->nets);
3995                 /*
3996                  * Mobility adaptation Ideally, if deleted destination is
3997                  * the primary, it becomes a fast retransmission trigger by
3998                  * the subsequent SET PRIMARY. (by micchie)
3999                  */
4000                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4001                     SCTP_MOBILITY_BASE) ||
4002                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4003                     SCTP_MOBILITY_FASTHANDOFF)) {
4004                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4005                         if (asoc->deleted_primary != NULL) {
4006                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4007                                 goto leave;
4008                         }
4009                         asoc->deleted_primary = net;
4010                         atomic_add_int(&net->ref_count, 1);
4011                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4012                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4013                         sctp_mobility_feature_on(stcb->sctp_ep,
4014                             SCTP_MOBILITY_PRIM_DELETED);
4015                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4016                             stcb->sctp_ep, stcb, NULL);
4017                 }
4018 leave:
4019                 /* Try to find a confirmed primary */
4020                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4021         }
4022         if (net == asoc->last_data_chunk_from) {
4023                 /* Reset primary */
4024                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4025         }
4026         if (net == asoc->last_control_chunk_from) {
4027                 /* Clear net */
4028                 asoc->last_control_chunk_from = NULL;
4029         }
4030         sctp_free_remote_addr(net);
4031 }
4032
4033 /*
4034  * remove a remote endpoint address from an association, it will fail if the
4035  * address does not exist.
4036  */
4037 int
4038 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4039 {
4040         /*
4041          * Here we need to remove a remote address. This is quite simple, we
4042          * first find it in the list of address for the association
4043          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4044          * on that item. Note we do not allow it to be removed if there are
4045          * no other addresses.
4046          */
4047         struct sctp_association *asoc;
4048         struct sctp_nets *net, *net_tmp;
4049
4050         asoc = &stcb->asoc;
4051
4052         /* locate the address */
4053         for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
4054                 net_tmp = TAILQ_NEXT(net, sctp_next);
4055                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4056                         continue;
4057                 }
4058                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4059                     remaddr)) {
4060                         /* we found the guy */
4061                         if (asoc->numnets < 2) {
4062                                 /* Must have at LEAST two remote addresses */
4063                                 return (-1);
4064                         } else {
4065                                 sctp_remove_net(stcb, net);
4066                                 return (0);
4067                         }
4068                 }
4069         }
4070         /* not found. */
4071         return (-2);
4072 }
4073
4074 void
4075 sctp_delete_from_timewait(uint32_t tag)
4076 {
4077         struct sctpvtaghead *chain;
4078         struct sctp_tagblock *twait_block;
4079         int found = 0;
4080         int i;
4081
4082         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4083         if (!SCTP_LIST_EMPTY(chain)) {
4084                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4085                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4086                                 if (twait_block->vtag_block[i].v_tag == tag) {
4087                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4088                                         twait_block->vtag_block[i].v_tag = 0;
4089                                         found = 1;
4090                                         break;
4091                                 }
4092                         }
4093                         if (found)
4094                                 break;
4095                 }
4096         }
4097 }
4098
4099 int
4100 sctp_is_in_timewait(uint32_t tag)
4101 {
4102         struct sctpvtaghead *chain;
4103         struct sctp_tagblock *twait_block;
4104         int found = 0;
4105         int i;
4106
4107         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4108         if (!SCTP_LIST_EMPTY(chain)) {
4109                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4110                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4111                                 if (twait_block->vtag_block[i].v_tag == tag) {
4112                                         found = 1;
4113                                         break;
4114                                 }
4115                         }
4116                         if (found)
4117                                 break;
4118                 }
4119         }
4120         return (found);
4121 }
4122
4123
4124 void
4125 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time)
4126 {
4127         struct sctpvtaghead *chain;
4128         struct sctp_tagblock *twait_block;
4129         struct timeval now;
4130         int set, i;
4131
4132         (void)SCTP_GETTIME_TIMEVAL(&now);
4133         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4134         set = 0;
4135         if (!SCTP_LIST_EMPTY(chain)) {
4136                 /* Block(s) present, lets find space, and expire on the fly */
4137                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4138                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4139                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
4140                                     !set) {
4141                                         twait_block->vtag_block[i].tv_sec_at_expire =
4142                                             now.tv_sec + time;
4143                                         twait_block->vtag_block[i].v_tag = tag;
4144                                         set = 1;
4145                                 } else if ((twait_block->vtag_block[i].v_tag) &&
4146                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4147                                         /* Audit expires this guy */
4148                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4149                                         twait_block->vtag_block[i].v_tag = 0;
4150                                         if (set == 0) {
4151                                                 /* Reuse it for my new tag */
4152                                                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4153                                                 twait_block->vtag_block[0].v_tag = tag;
4154                                                 set = 1;
4155                                         }
4156                                 }
4157                         }
4158                         if (set) {
4159                                 /*
4160                                  * We only do up to the block where we can
4161                                  * place our tag for audits
4162                                  */
4163                                 break;
4164                         }
4165                 }
4166         }
4167         /* Need to add a new block to chain */
4168         if (!set) {
4169                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4170                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4171                 if (twait_block == NULL) {
4172                         return;
4173                 }
4174                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4175                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4176                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4177                 twait_block->vtag_block[0].v_tag = tag;
4178         }
4179 }
4180
4181
4182 static void
4183 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4184 {
4185         struct sctp_iterator *it;
4186
4187         /*
4188          * Unlock the tcb lock we do this so we avoid a dead lock scenario
4189          * where the iterator is waiting on the TCB lock and the TCB lock is
4190          * waiting on the iterator lock.
4191          */
4192         it = stcb->asoc.stcb_starting_point_for_iterator;
4193         if (it == NULL) {
4194                 return;
4195         }
4196         if (it->inp != stcb->sctp_ep) {
4197                 /* hmm, focused on the wrong one? */
4198                 return;
4199         }
4200         if (it->stcb != stcb) {
4201                 return;
4202         }
4203         it->stcb = LIST_NEXT(stcb, sctp_tcblist);
4204         if (it->stcb == NULL) {
4205                 /* done with all asoc's in this assoc */
4206                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
4207                         it->inp = NULL;
4208                 } else {
4209                         it->inp = LIST_NEXT(inp, sctp_list);
4210                 }
4211         }
4212 }
4213
4214
4215 /*-
4216  * Free the association after un-hashing the remote port. This
4217  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4218  * expect that the input to this function IS a locked TCB.
4219  * It will return 0, if it did NOT destroy the association (instead
4220  * it unlocks it. It will return NON-zero if it either destroyed the
4221  * association OR the association is already destroyed.
4222  */
4223 int
4224 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4225 {
4226         int i;
4227         struct sctp_association *asoc;
4228         struct sctp_nets *net, *prev;
4229         struct sctp_laddr *laddr;
4230         struct sctp_tmit_chunk *chk;
4231         struct sctp_asconf_addr *aparam;
4232         struct sctp_asconf_ack *aack;
4233         struct sctp_stream_reset_list *liste;
4234         struct sctp_queued_to_read *sq;
4235         struct sctp_stream_queue_pending *sp;
4236         sctp_sharedkey_t *shared_key;
4237         struct socket *so;
4238         int ccnt = 0;
4239         int cnt = 0;
4240
4241         /* first, lets purge the entry from the hash table. */
4242
4243 #ifdef SCTP_LOG_CLOSING
4244         sctp_log_closing(inp, stcb, 6);
4245 #endif
4246         if (stcb->asoc.state == 0) {
4247 #ifdef SCTP_LOG_CLOSING
4248                 sctp_log_closing(inp, NULL, 7);
4249 #endif
4250                 /* there is no asoc, really TSNH :-0 */
4251                 return (1);
4252         }
4253         /* TEMP CODE */
4254         if (stcb->freed_from_where == 0) {
4255                 /* Only record the first place free happened from */
4256                 stcb->freed_from_where = from_location;
4257         }
4258         /* TEMP CODE */
4259
4260         asoc = &stcb->asoc;
4261         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4262             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4263                 /* nothing around */
4264                 so = NULL;
4265         else
4266                 so = inp->sctp_socket;
4267
4268         /*
4269          * We used timer based freeing if a reader or writer is in the way.
4270          * So we first check if we are actually being called from a timer,
4271          * if so we abort early if a reader or writer is still in the way.
4272          */
4273         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4274             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4275                 /*
4276                  * is it the timer driving us? if so are the reader/writers
4277                  * gone?
4278                  */
4279                 if (stcb->asoc.refcnt) {
4280                         /* nope, reader or writer in the way */
4281                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4282                         /* no asoc destroyed */
4283                         SCTP_TCB_UNLOCK(stcb);
4284 #ifdef SCTP_LOG_CLOSING
4285                         sctp_log_closing(inp, stcb, 8);
4286 #endif
4287                         return (0);
4288                 }
4289         }
4290         /* now clean up any other timers */
4291         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4292         asoc->hb_timer.self = NULL;
4293         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4294         asoc->dack_timer.self = NULL;
4295         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4296         /*-
4297          * For stream reset we don't blast this unless
4298          * it is a str-reset timer, it might be the
4299          * free-asoc timer which we DON'T want to
4300          * disturb.
4301          */
4302         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4303                 asoc->strreset_timer.self = NULL;
4304         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4305         asoc->asconf_timer.self = NULL;
4306         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4307         asoc->autoclose_timer.self = NULL;
4308         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4309         asoc->shut_guard_timer.self = NULL;
4310         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4311         asoc->delayed_event_timer.self = NULL;
4312         /* Mobility adaptation */
4313         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4314         asoc->delete_prim_timer.self = NULL;
4315         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4316                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4317                 net->fr_timer.self = NULL;
4318                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4319                 net->rxt_timer.self = NULL;
4320                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4321                 net->pmtu_timer.self = NULL;
4322         }
4323         /* Now the read queue needs to be cleaned up (only once) */
4324         cnt = 0;
4325         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4326                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4327                 SCTP_INP_READ_LOCK(inp);
4328                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4329                         if (sq->stcb == stcb) {
4330                                 sq->do_not_ref_stcb = 1;
4331                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4332                                 /*
4333                                  * If there is no end, there never will be
4334                                  * now.
4335                                  */
4336                                 if (sq->end_added == 0) {
4337                                         /* Held for PD-API clear that. */
4338                                         sq->pdapi_aborted = 1;
4339                                         sq->held_length = 0;
4340                                         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4341                                                 /*
4342                                                  * Need to add a PD-API
4343                                                  * aborted indication.
4344                                                  * Setting the control_pdapi
4345                                                  * assures that it will be
4346                                                  * added right after this
4347                                                  * msg.
4348                                                  */
4349                                                 uint32_t strseq;
4350
4351                                                 stcb->asoc.control_pdapi = sq;
4352                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4353                                                 sctp_notify_partial_delivery_indication(stcb,
4354                                                     SCTP_PARTIAL_DELIVERY_ABORTED, 1, strseq);
4355                                                 stcb->asoc.control_pdapi = NULL;
4356                                         }
4357                                 }
4358                                 /* Add an end to wake them */
4359                                 sq->end_added = 1;
4360                                 cnt++;
4361                         }
4362                 }
4363                 SCTP_INP_READ_UNLOCK(inp);
4364                 if (stcb->block_entry) {
4365                         cnt++;
4366                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4367                         stcb->block_entry->error = ECONNRESET;
4368                         stcb->block_entry = NULL;
4369                 }
4370         }
4371         if (stcb->asoc.refcnt) {
4372                 /*
4373                  * reader or writer in the way, we have hopefully given him
4374                  * something to chew on above.
4375                  */
4376                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4377                 SCTP_TCB_UNLOCK(stcb);
4378                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4379                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4380                         /* nothing around */
4381                         so = NULL;
4382                 if (so) {
4383                         /* Wake any reader/writers */
4384                         sctp_sorwakeup(inp, so);
4385                         sctp_sowwakeup(inp, so);
4386                 }
4387 #ifdef SCTP_LOG_CLOSING
4388                 sctp_log_closing(inp, stcb, 9);
4389 #endif
4390                 /* no asoc destroyed */
4391                 return (0);
4392         }
4393 #ifdef SCTP_LOG_CLOSING
4394         sctp_log_closing(inp, stcb, 10);
4395 #endif
4396         /*
4397          * When I reach here, no others want to kill the assoc yet.. and I
4398          * own the lock. Now its possible an abort comes in when I do the
4399          * lock exchange below to grab all the locks to do the final take
4400          * out. to prevent this we increment the count, which will start a
4401          * timer and blow out above thus assuring us that we hold exclusive
4402          * killing of the asoc. Note that after getting back the TCB lock we
4403          * will go ahead and increment the counter back up and stop any
4404          * timer a passing stranger may have started :-S
4405          */
4406         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4407                 atomic_add_int(&stcb->asoc.refcnt, 1);
4408
4409                 SCTP_TCB_UNLOCK(stcb);
4410
4411                 SCTP_ITERATOR_LOCK();
4412                 SCTP_INP_INFO_WLOCK();
4413                 SCTP_INP_WLOCK(inp);
4414                 SCTP_TCB_LOCK(stcb);
4415         }
4416         /* Double check the GONE flag */
4417         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4418             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4419                 /* nothing around */
4420                 so = NULL;
4421
4422         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4423             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4424                 /*
4425                  * For TCP type we need special handling when we are
4426                  * connected. We also include the peel'ed off ones to.
4427                  */
4428                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4429                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4430                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4431                         if (so) {
4432                                 SOCK_LOCK(so);
4433                                 if (so->so_rcv.sb_cc == 0) {
4434                                         so->so_state &= ~(SS_ISCONNECTING |
4435                                             SS_ISDISCONNECTING |
4436                                             SS_ISCONFIRMING |
4437                                             SS_ISCONNECTED);
4438                                 }
4439                                 SOCK_UNLOCK(so);
4440                                 socantrcvmore(so);
4441                                 sctp_sowwakeup(inp, so);
4442                                 sctp_sorwakeup(inp, so);
4443                                 SCTP_SOWAKEUP(so);
4444                         }
4445                 }
4446         }
4447         /*
4448          * Make it invalid too, that way if its about to run it will abort
4449          * and return.
4450          */
4451         sctp_iterator_asoc_being_freed(inp, stcb);
4452         /* re-increment the lock */
4453         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4454                 atomic_add_int(&stcb->asoc.refcnt, -1);
4455         }
4456         asoc->state = 0;
4457         if (inp->sctp_tcbhash) {
4458                 LIST_REMOVE(stcb, sctp_tcbhash);
4459         }
4460         if (stcb->asoc.in_restart_hash) {
4461                 LIST_REMOVE(stcb, sctp_tcbrestarhash);
4462         }
4463         /* Now lets remove it from the list of ALL associations in the EP */
4464         LIST_REMOVE(stcb, sctp_tcblist);
4465         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4466                 SCTP_INP_INCR_REF(inp);
4467                 SCTP_INP_WUNLOCK(inp);
4468                 SCTP_ITERATOR_UNLOCK();
4469         }
4470         /* pull from vtag hash */
4471         LIST_REMOVE(stcb, sctp_asocs);
4472         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_TIME_WAIT);
4473
4474         /*
4475          * Now restop the timers to be sure - this is paranoia at is finest!
4476          */
4477         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4478         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4479         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4480         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4481         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4482         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4483         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4484         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4485         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4486                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4487                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4488                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4489         }
4490
4491         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4492         prev = NULL;
4493         /*
4494          * The chunk lists and such SHOULD be empty but we check them just
4495          * in case.
4496          */
4497         /* anything on the wheel needs to be removed */
4498         for (i = 0; i < asoc->streamoutcnt; i++) {
4499                 struct sctp_stream_out *outs;
4500
4501                 outs = &asoc->strmout[i];
4502                 /* now clean up any chunks here */
4503                 sp = TAILQ_FIRST(&outs->outqueue);
4504                 while (sp) {
4505                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4506                         if (sp->data) {
4507                                 sctp_m_freem(sp->data);
4508                                 sp->data = NULL;
4509                                 sp->tail_mbuf = NULL;
4510                         }
4511                         sctp_free_remote_addr(sp->net);
4512                         sctp_free_spbufspace(stcb, asoc, sp);
4513                         /* Free the zone stuff  */
4514                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_strmoq, sp);
4515                         SCTP_DECR_STRMOQ_COUNT();
4516                         /* sa_ignore FREED_MEMORY */
4517                         sp = TAILQ_FIRST(&outs->outqueue);
4518                 }
4519         }
4520
4521         /* sa_ignore FREED_MEMORY */
4522         while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) {
4523                 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp);
4524                 SCTP_FREE(liste, SCTP_M_STRESET);
4525         }
4526
4527         sq = TAILQ_FIRST(&asoc->pending_reply_queue);
4528         while (sq) {
4529                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4530                 if (sq->data) {
4531                         sctp_m_freem(sq->data);
4532                         sq->data = NULL;
4533                 }
4534                 sctp_free_remote_addr(sq->whoFrom);
4535                 sq->whoFrom = NULL;
4536                 sq->stcb = NULL;
4537                 /* Free the ctl entry */
4538                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq);
4539                 SCTP_DECR_READQ_COUNT();
4540                 /* sa_ignore FREED_MEMORY */
4541                 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
4542         }
4543
4544         chk = TAILQ_FIRST(&asoc->free_chunks);
4545         while (chk) {
4546                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4547                 if (chk->data) {
4548                         sctp_m_freem(chk->data);
4549                         chk->data = NULL;
4550                 }
4551                 ccnt++;
4552                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4553                 SCTP_DECR_CHK_COUNT();
4554                 atomic_subtract_int(&sctppcbinfo.ipi_free_chunks, 1);
4555                 asoc->free_chunk_cnt--;
4556                 /* sa_ignore FREED_MEMORY */
4557                 chk = TAILQ_FIRST(&asoc->free_chunks);
4558         }
4559         /* pending send queue SHOULD be empty */
4560         if (!TAILQ_EMPTY(&asoc->send_queue)) {
4561                 chk = TAILQ_FIRST(&asoc->send_queue);
4562                 while (chk) {
4563                         TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4564                         if (chk->data) {
4565                                 sctp_m_freem(chk->data);
4566                                 chk->data = NULL;
4567                         }
4568                         ccnt++;
4569                         sctp_free_remote_addr(chk->whoTo);
4570                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4571                         SCTP_DECR_CHK_COUNT();
4572                         /* sa_ignore FREED_MEMORY */
4573                         chk = TAILQ_FIRST(&asoc->send_queue);
4574                 }
4575         }
4576 /*
4577   if(ccnt) {
4578   printf("Freed %d from send_queue\n", ccnt);
4579   ccnt = 0;
4580   }
4581 */
4582         /* sent queue SHOULD be empty */
4583         if (!TAILQ_EMPTY(&asoc->sent_queue)) {
4584                 chk = TAILQ_FIRST(&asoc->sent_queue);
4585                 while (chk) {
4586                         TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4587                         if (chk->data) {
4588                                 sctp_m_freem(chk->data);
4589                                 chk->data = NULL;
4590                         }
4591                         ccnt++;
4592                         sctp_free_remote_addr(chk->whoTo);
4593                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4594                         SCTP_DECR_CHK_COUNT();
4595                         /* sa_ignore FREED_MEMORY */
4596                         chk = TAILQ_FIRST(&asoc->sent_queue);
4597                 }
4598         }
4599 /*
4600   if(ccnt) {
4601   printf("Freed %d from sent_queue\n", ccnt);
4602   ccnt = 0;
4603   }
4604 */
4605         /* control queue MAY not be empty */
4606         if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
4607                 chk = TAILQ_FIRST(&asoc->control_send_queue);
4608                 while (chk) {
4609                         TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4610                         if (chk->data) {
4611                                 sctp_m_freem(chk->data);
4612                                 chk->data = NULL;
4613                         }
4614                         ccnt++;
4615                         sctp_free_remote_addr(chk->whoTo);
4616                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4617                         SCTP_DECR_CHK_COUNT();
4618                         /* sa_ignore FREED_MEMORY */
4619                         chk = TAILQ_FIRST(&asoc->control_send_queue);
4620                 }
4621         }
4622 /*
4623   if(ccnt) {
4624   printf("Freed %d from ctrl_queue\n", ccnt);
4625   ccnt = 0;
4626   }
4627 */
4628         if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
4629                 chk = TAILQ_FIRST(&asoc->reasmqueue);
4630                 while (chk) {
4631                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
4632                         if (chk->data) {
4633                                 sctp_m_freem(chk->data);
4634                                 chk->data = NULL;
4635                         }
4636                         sctp_free_remote_addr(chk->whoTo);
4637                         ccnt++;
4638                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4639                         SCTP_DECR_CHK_COUNT();
4640                         /* sa_ignore FREED_MEMORY */
4641                         chk = TAILQ_FIRST(&asoc->reasmqueue);
4642                 }
4643         }
4644 /*
4645   if(ccnt) {
4646   printf("Freed %d from reasm_queue\n", ccnt);
4647   ccnt = 0;
4648   }
4649 */
4650         if (asoc->mapping_array) {
4651                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4652                 asoc->mapping_array = NULL;
4653         }
4654         /* the stream outs */
4655         if (asoc->strmout) {
4656                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4657                 asoc->strmout = NULL;
4658         }
4659         asoc->streamoutcnt = 0;
4660         if (asoc->strmin) {
4661                 struct sctp_queued_to_read *ctl;
4662
4663                 for (i = 0; i < asoc->streamincnt; i++) {
4664                         if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
4665                                 /* We have somethings on the streamin queue */
4666                                 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4667                                 while (ctl) {
4668                                         TAILQ_REMOVE(&asoc->strmin[i].inqueue,
4669                                             ctl, next);
4670                                         sctp_free_remote_addr(ctl->whoFrom);
4671                                         if (ctl->data) {
4672                                                 sctp_m_freem(ctl->data);
4673                                                 ctl->data = NULL;
4674                                         }
4675                                         /*
4676                                          * We don't free the address here
4677                                          * since all the net's were freed
4678                                          * above.
4679                                          */
4680                                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl);
4681                                         SCTP_DECR_READQ_COUNT();
4682                                         ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4683                                 }
4684                         }
4685                 }
4686                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
4687                 asoc->strmin = NULL;
4688         }
4689         asoc->streamincnt = 0;
4690         while (!TAILQ_EMPTY(&asoc->nets)) {
4691                 /* sa_ignore FREED_MEMORY */
4692                 net = TAILQ_FIRST(&asoc->nets);
4693                 /* pull from list */
4694                 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) {
4695 #ifdef INVARIANTS
4696                         panic("no net's left alloc'ed, or list points to itself");
4697 #endif
4698                         break;
4699                 }
4700                 prev = net;
4701                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4702                 sctp_free_remote_addr(net);
4703         }
4704
4705         while (!SCTP_LIST_EMPTY(&asoc->sctp_restricted_addrs)) {
4706                 /* sa_ignore FREED_MEMORY */
4707                 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs);
4708                 sctp_remove_laddr(laddr);
4709         }
4710
4711         /* pending asconf (address) parameters */
4712         while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
4713                 /* sa_ignore FREED_MEMORY */
4714                 aparam = TAILQ_FIRST(&asoc->asconf_queue);
4715                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
4716                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
4717         }
4718         while (!TAILQ_EMPTY(&asoc->asconf_ack_sent)) {
4719                 /* sa_ignore FREED_MEMORY */
4720                 aack = TAILQ_FIRST(&asoc->asconf_ack_sent);
4721                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
4722                 if (aack->data != NULL) {
4723                         sctp_m_freem(aack->data);
4724                 }
4725                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asconf_ack, aack);
4726         }
4727         /* clean up auth stuff */
4728         if (asoc->local_hmacs)
4729                 sctp_free_hmaclist(asoc->local_hmacs);
4730         if (asoc->peer_hmacs)
4731                 sctp_free_hmaclist(asoc->peer_hmacs);
4732
4733         if (asoc->local_auth_chunks)
4734                 sctp_free_chunklist(asoc->local_auth_chunks);
4735         if (asoc->peer_auth_chunks)
4736                 sctp_free_chunklist(asoc->peer_auth_chunks);
4737
4738         sctp_free_authinfo(&asoc->authinfo);
4739
4740         shared_key = LIST_FIRST(&asoc->shared_keys);
4741         while (shared_key) {
4742                 LIST_REMOVE(shared_key, next);
4743                 sctp_free_sharedkey(shared_key);
4744                 /* sa_ignore FREED_MEMORY */
4745                 shared_key = LIST_FIRST(&asoc->shared_keys);
4746         }
4747
4748         /* Insert new items here :> */
4749
4750         /* Get rid of LOCK */
4751         SCTP_TCB_LOCK_DESTROY(stcb);
4752         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4753         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4754                 SCTP_INP_INFO_WUNLOCK();
4755                 SCTP_INP_RLOCK(inp);
4756         }
4757 #ifdef SCTP_TRACK_FREED_ASOCS
4758         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4759                 /* now clean up the tasoc itself */
4760                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
4761                 SCTP_DECR_ASOC_COUNT();
4762         } else {
4763                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
4764         }
4765 #else
4766         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
4767         SCTP_DECR_ASOC_COUNT();
4768 #endif
4769         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4770                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4771                         /*
4772                          * If its NOT the inp_free calling us AND sctp_close
4773                          * as been called, we call back...
4774                          */
4775                         SCTP_INP_RUNLOCK(inp);
4776                         /*
4777                          * This will start the kill timer (if we are the
4778                          * lastone) since we hold an increment yet. But this
4779                          * is the only safe way to do this since otherwise
4780                          * if the socket closes at the same time we are here
4781                          * we might collide in the cleanup.
4782                          */
4783                         sctp_inpcb_free(inp,
4784                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
4785                             SCTP_CALLED_DIRECTLY_NOCMPSET);
4786                         SCTP_INP_DECR_REF(inp);
4787                         goto out_of;
4788                 } else {
4789                         /* The socket is still open. */
4790                         SCTP_INP_DECR_REF(inp);
4791                 }
4792         }
4793         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4794                 SCTP_INP_RUNLOCK(inp);
4795         }
4796 out_of:
4797         /* destroyed the asoc */
4798 #ifdef SCTP_LOG_CLOSING
4799         sctp_log_closing(inp, NULL, 11);
4800 #endif
4801         return (1);
4802 }
4803
4804
4805
4806 /*
4807  * determine if a destination is "reachable" based upon the addresses bound
4808  * to the current endpoint (e.g. only v4 or v6 currently bound)
4809  */
4810 /*
4811  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
4812  * assoc level v4/v6 flags, as the assoc *may* not have the same address
4813  * types bound as its endpoint
4814  */
4815 int
4816 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
4817 {
4818         struct sctp_inpcb *inp;
4819         int answer;
4820
4821         /*
4822          * No locks here, the TCB, in all cases is already locked and an
4823          * assoc is up. There is either a INP lock by the caller applied (in
4824          * asconf case when deleting an address) or NOT in the HB case,
4825          * however if HB then the INP increment is up and the INP will not
4826          * be removed (on top of the fact that we have a TCB lock). So we
4827          * only want to read the sctp_flags, which is either bound-all or
4828          * not.. no protection needed since once an assoc is up you can't be
4829          * changing your binding.
4830          */
4831         inp = stcb->sctp_ep;
4832         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4833                 /* if bound all, destination is not restricted */
4834                 /*
4835                  * RRS: Question during lock work: Is this correct? If you
4836                  * are bound-all you still might need to obey the V4--V6
4837                  * flags??? IMO this bound-all stuff needs to be removed!
4838                  */
4839                 return (1);
4840         }
4841         /* NOTE: all "scope" checks are done when local addresses are added */
4842         if (destaddr->sa_family == AF_INET6) {
4843                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
4844         } else if (destaddr->sa_family == AF_INET) {
4845                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
4846         } else {
4847                 /* invalid family, so it's unreachable */
4848                 answer = 0;
4849         }
4850         return (answer);
4851 }
4852
4853 /*
4854  * update the inp_vflags on an endpoint
4855  */
4856 static void
4857 sctp_update_ep_vflag(struct sctp_inpcb *inp)
4858 {
4859         struct sctp_laddr *laddr;
4860
4861         /* first clear the flag */
4862         inp->ip_inp.inp.inp_vflag = 0;
4863         /* set the flag based on addresses on the ep list */
4864         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4865                 if (laddr->ifa == NULL) {
4866                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
4867                             __FUNCTION__);
4868                         continue;
4869                 }
4870                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
4871                         continue;
4872                 }
4873                 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
4874                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
4875                 } else if (laddr->ifa->address.sa.sa_family == AF_INET) {
4876                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
4877                 }
4878         }
4879 }
4880
4881 /*
4882  * Add the address to the endpoint local address list There is nothing to be
4883  * done if we are bound to all addresses
4884  */
4885 void
4886 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
4887 {
4888         struct sctp_laddr *laddr;
4889         int fnd, error = 0;
4890
4891         fnd = 0;
4892
4893         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4894                 /* You are already bound to all. You have it already */
4895                 return;
4896         }
4897         if (ifa->address.sa.sa_family == AF_INET6) {
4898                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
4899                         /* Can't bind a non-useable addr. */
4900                         return;
4901                 }
4902         }
4903         /* first, is it already present? */
4904         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4905                 if (laddr->ifa == ifa) {
4906                         fnd = 1;
4907                         break;
4908                 }
4909         }
4910
4911         if (fnd == 0) {
4912                 /* Not in the ep list */
4913                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
4914                 if (error != 0)
4915                         return;
4916                 inp->laddr_count++;
4917                 /* update inp_vflag flags */
4918                 if (ifa->address.sa.sa_family == AF_INET6) {
4919                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
4920                 } else if (ifa->address.sa.sa_family == AF_INET) {
4921                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
4922                 }
4923         }
4924         return;
4925 }
4926
4927
4928 /*
4929  * select a new (hopefully reachable) destination net (should only be used
4930  * when we deleted an ep addr that is the only usable source address to reach
4931  * the destination net)
4932  */
4933 static void
4934 sctp_select_primary_destination(struct sctp_tcb *stcb)
4935 {
4936         struct sctp_nets *net;
4937
4938         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4939                 /* for now, we'll just pick the first reachable one we find */
4940                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
4941                         continue;
4942                 if (sctp_destination_is_reachable(stcb,
4943                     (struct sockaddr *)&net->ro._l_addr)) {
4944                         /* found a reachable destination */
4945                         stcb->asoc.primary_destination = net;
4946                 }
4947         }
4948         /* I can't there from here! ...we're gonna die shortly... */
4949 }
4950
4951
4952 /*
4953  * Delete the address from the endpoint local address list There is nothing
4954  * to be done if we are bound to all addresses
4955  */
4956 void
4957 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
4958 {
4959         struct sctp_laddr *laddr;
4960         int fnd;
4961
4962         fnd = 0;
4963         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4964                 /* You are already bound to all. You have it already */
4965                 return;
4966         }
4967         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4968                 if (laddr->ifa == ifa) {
4969                         fnd = 1;
4970                         break;
4971                 }
4972         }
4973         if (fnd && (inp->laddr_count < 2)) {
4974                 /* can't delete unless there are at LEAST 2 addresses */
4975                 return;
4976         }
4977         if (fnd) {
4978                 /*
4979                  * clean up any use of this address go through our
4980                  * associations and clear any last_used_address that match
4981                  * this one for each assoc, see if a new primary_destination
4982                  * is needed
4983                  */
4984                 struct sctp_tcb *stcb;
4985
4986                 /* clean up "next_addr_touse" */
4987                 if (inp->next_addr_touse == laddr)
4988                         /* delete this address */
4989                         inp->next_addr_touse = NULL;
4990
4991                 /* clean up "last_used_address" */
4992                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
4993                         struct sctp_nets *net;
4994
4995                         SCTP_TCB_LOCK(stcb);
4996                         if (stcb->asoc.last_used_address == laddr)
4997                                 /* delete this address */
4998                                 stcb->asoc.last_used_address = NULL;
4999                         /*
5000                          * Now spin through all the nets and purge any ref
5001                          * to laddr
5002                          */
5003                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5004                                 if (net->ro._s_addr &&
5005                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5006                                         /* Yep, purge src address selected */
5007                                         sctp_rtentry_t *rt;
5008
5009                                         /* delete this address if cached */
5010                                         rt = net->ro.ro_rt;
5011                                         if (rt != NULL) {
5012                                                 RTFREE(rt);
5013                                                 net->ro.ro_rt = NULL;
5014                                         }
5015                                         sctp_free_ifa(net->ro._s_addr);
5016                                         net->ro._s_addr = NULL;
5017                                         net->src_addr_selected = 0;
5018                                 }
5019                         }
5020                         SCTP_TCB_UNLOCK(stcb);
5021                 }               /* for each tcb */
5022                 /* remove it from the ep list */
5023                 sctp_remove_laddr(laddr);
5024                 inp->laddr_count--;
5025                 /* update inp_vflag flags */
5026                 sctp_update_ep_vflag(inp);
5027         }
5028         return;
5029 }
5030
5031 /*
5032  * Add the address to the TCB local address restricted list.
5033  * This is a "pending" address list (eg. addresses waiting for an
5034  * ASCONF-ACK response) and cannot be used as a valid source address.
5035  */
5036 void
5037 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5038 {
5039         struct sctp_inpcb *inp;
5040         struct sctp_laddr *laddr;
5041         struct sctpladdr *list;
5042
5043         /*
5044          * Assumes TCB is locked.. and possibly the INP. May need to
5045          * confirm/fix that if we need it and is not the case.
5046          */
5047         list = &stcb->asoc.sctp_restricted_addrs;
5048
5049         inp = stcb->sctp_ep;
5050         if (ifa->address.sa.sa_family == AF_INET6) {
5051                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5052                         /* Can't bind a non-existent addr. */
5053                         return;
5054                 }
5055         }
5056         /* does the address already exist? */
5057         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5058                 if (laddr->ifa == ifa) {
5059                         return;
5060                 }
5061         }
5062
5063         /* add to the list */
5064         (void)sctp_insert_laddr(list, ifa, 0);
5065         return;
5066 }
5067
5068 /*
5069  * insert an laddr entry with the given ifa for the desired list
5070  */
5071 int
5072 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5073 {
5074         struct sctp_laddr *laddr;
5075
5076         laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
5077         if (laddr == NULL) {
5078                 /* out of memory? */
5079                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5080                 return (EINVAL);
5081         }
5082         SCTP_INCR_LADDR_COUNT();
5083         bzero(laddr, sizeof(*laddr));
5084         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5085         laddr->ifa = ifa;
5086         laddr->action = act;
5087         atomic_add_int(&ifa->refcount, 1);
5088         /* insert it */
5089         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5090
5091         return (0);
5092 }
5093
5094 /*
5095  * Remove an laddr entry from the local address list (on an assoc)
5096  */
5097 void
5098 sctp_remove_laddr(struct sctp_laddr *laddr)
5099 {
5100
5101         /* remove from the list */
5102         LIST_REMOVE(laddr, sctp_nxt_addr);
5103         sctp_free_ifa(laddr->ifa);
5104         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
5105         SCTP_DECR_LADDR_COUNT();
5106 }
5107
5108 /*
5109  * Remove a local address from the TCB local address restricted list
5110  */
5111 void
5112 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5113 {
5114         struct sctp_inpcb *inp;
5115         struct sctp_laddr *laddr;
5116
5117         /*
5118          * This is called by asconf work. It is assumed that a) The TCB is
5119          * locked and b) The INP is locked. This is true in as much as I can
5120          * trace through the entry asconf code where I did these locks.
5121          * Again, the ASCONF code is a bit different in that it does lock
5122          * the INP during its work often times. This must be since we don't
5123          * want other proc's looking up things while what they are looking
5124          * up is changing :-D
5125          */
5126
5127         inp = stcb->sctp_ep;
5128         /* if subset bound and don't allow ASCONF's, can't delete last */
5129         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5130             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5131                 if (stcb->sctp_ep->laddr_count < 2) {
5132                         /* can't delete last address */
5133                         return;
5134                 }
5135         }
5136         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5137                 /* remove the address if it exists */
5138                 if (laddr->ifa == NULL)
5139                         continue;
5140                 if (laddr->ifa == ifa) {
5141                         sctp_remove_laddr(laddr);
5142                         return;
5143                 }
5144         }
5145
5146         /* address not found! */
5147         return;
5148 }
5149
5150 static char sctp_pcb_initialized = 0;
5151
5152 /*
5153  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5154  */
5155 /* sysctl */
5156 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5157 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5158
5159 void
5160 sctp_pcb_init()
5161 {
5162         /*
5163          * SCTP initialization for the PCB structures should be called by
5164          * the sctp_init() funciton.
5165          */
5166         int i;
5167         struct timeval tv;
5168
5169         if (sctp_pcb_initialized != 0) {
5170                 /* error I was called twice */
5171                 return;
5172         }
5173         sctp_pcb_initialized = 1;
5174
5175         bzero(&sctpstat, sizeof(struct sctpstat));
5176 #if defined(SCTP_LOCAL_TRACE_BUF)
5177         bzero(&sctp_log, sizeof(struct sctp_log));
5178 #endif
5179         (void)SCTP_GETTIME_TIMEVAL(&tv);
5180         sctpstat.sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5181         sctpstat.sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5182         /* init the empty list of (All) Endpoints */
5183         LIST_INIT(&sctppcbinfo.listhead);
5184
5185         /* init the iterator head */
5186         TAILQ_INIT(&sctppcbinfo.iteratorhead);
5187
5188         /* init the hash table of endpoints */
5189         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &sctp_hashtblsize);
5190         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize);
5191         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale);
5192         sctppcbinfo.sctp_asochash = SCTP_HASH_INIT((sctp_hashtblsize * 31),
5193             &sctppcbinfo.hashasocmark);
5194         sctppcbinfo.sctp_ephash = SCTP_HASH_INIT(sctp_hashtblsize,
5195             &sctppcbinfo.hashmark);
5196         sctppcbinfo.sctp_tcpephash = SCTP_HASH_INIT(sctp_hashtblsize,
5197             &sctppcbinfo.hashtcpmark);
5198         sctppcbinfo.hashtblsize = sctp_hashtblsize;
5199
5200         /* init the small hash table we use to track restarted asoc's */
5201         sctppcbinfo.sctp_restarthash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE,
5202             &sctppcbinfo.hashrestartmark);
5203
5204
5205         sctppcbinfo.sctp_vrfhash = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5206             &sctppcbinfo.hashvrfmark);
5207
5208         sctppcbinfo.vrf_ifn_hash = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5209             &sctppcbinfo.vrf_ifn_hashmark);
5210
5211         /* init the zones */
5212         /*
5213          * FIX ME: Should check for NULL returns, but if it does fail we are
5214          * doomed to panic anyways... add later maybe.
5215          */
5216         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_ep, "sctp_ep",
5217             sizeof(struct sctp_inpcb), maxsockets);
5218
5219         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc",
5220             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5221
5222         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr",
5223             sizeof(struct sctp_laddr),
5224             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5225
5226         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr",
5227             sizeof(struct sctp_nets),
5228             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5229
5230         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk",
5231             sizeof(struct sctp_tmit_chunk),
5232             (sctp_max_number_of_assoc * sctp_chunkscale));
5233
5234         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_readq, "sctp_readq",
5235             sizeof(struct sctp_queued_to_read),
5236             (sctp_max_number_of_assoc * sctp_chunkscale));
5237
5238         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_strmoq, "sctp_stream_msg_out",
5239             sizeof(struct sctp_stream_queue_pending),
5240             (sctp_max_number_of_assoc * sctp_chunkscale));
5241
5242         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asconf_ack, "sctp_asconf_ack",
5243             sizeof(struct sctp_asconf_ack),
5244             (sctp_max_number_of_assoc * sctp_chunkscale));
5245
5246
5247         /* Master Lock INIT for info structure */
5248         SCTP_INP_INFO_LOCK_INIT();
5249         SCTP_STATLOG_INIT_LOCK();
5250         SCTP_ITERATOR_LOCK_INIT();
5251
5252         SCTP_IPI_COUNT_INIT();
5253         SCTP_IPI_ADDR_INIT();
5254         SCTP_IPI_ITERATOR_WQ_INIT();
5255 #ifdef SCTP_PACKET_LOGGING
5256         SCTP_IP_PKTLOG_INIT();
5257 #endif
5258         LIST_INIT(&sctppcbinfo.addr_wq);
5259
5260         /* not sure if we need all the counts */
5261         sctppcbinfo.ipi_count_ep = 0;
5262         /* assoc/tcb zone info */
5263         sctppcbinfo.ipi_count_asoc = 0;
5264         /* local addrlist zone info */
5265         sctppcbinfo.ipi_count_laddr = 0;
5266         /* remote addrlist zone info */
5267         sctppcbinfo.ipi_count_raddr = 0;
5268         /* chunk info */
5269         sctppcbinfo.ipi_count_chunk = 0;
5270
5271         /* socket queue zone info */
5272         sctppcbinfo.ipi_count_readq = 0;
5273
5274         /* stream out queue cont */
5275         sctppcbinfo.ipi_count_strmoq = 0;
5276
5277         sctppcbinfo.ipi_free_strmoq = 0;
5278         sctppcbinfo.ipi_free_chunks = 0;
5279
5280         SCTP_OS_TIMER_INIT(&sctppcbinfo.addr_wq_timer.timer);
5281
5282         /* Init the TIMEWAIT list */
5283         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE_A; i++) {
5284                 LIST_INIT(&sctppcbinfo.vtag_timewait[i]);
5285         }
5286
5287 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
5288         sctppcbinfo.iterator_running = 0;
5289         sctp_startup_iterator();
5290 #endif
5291
5292         /*
5293          * INIT the default VRF which for BSD is the only one, other O/S's
5294          * may have more. But initially they must start with one and then
5295          * add the VRF's as addresses are added.
5296          */
5297         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5298
5299 }
5300
5301
5302 int
5303 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5304     int iphlen, int offset, int limit, struct sctphdr *sh,
5305     struct sockaddr *altsa)
5306 {
5307         /*
5308          * grub through the INIT pulling addresses and loading them to the
5309          * nets structure in the asoc. The from address in the mbuf should
5310          * also be loaded (if it is not already). This routine can be called
5311          * with either INIT or INIT-ACK's as long as the m points to the IP
5312          * packet and the offset points to the beginning of the parameters.
5313          */
5314         struct sctp_inpcb *inp, *l_inp;
5315         struct sctp_nets *net, *net_tmp;
5316         struct ip *iph;
5317         struct sctp_paramhdr *phdr, parm_buf;
5318         struct sctp_tcb *stcb_tmp;
5319         uint16_t ptype, plen;
5320         struct sockaddr *sa;
5321         struct sockaddr_storage dest_store;
5322         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
5323         struct sockaddr_in sin;
5324         struct sockaddr_in6 sin6;
5325         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
5326         struct sctp_auth_random *p_random = NULL;
5327         uint16_t random_len = 0;
5328         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
5329         struct sctp_auth_hmac_algo *hmacs = NULL;
5330         uint16_t hmacs_len = 0;
5331         uint8_t saw_asconf = 0;
5332         uint8_t saw_asconf_ack = 0;
5333         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
5334         struct sctp_auth_chunk_list *chunks = NULL;
5335         uint16_t num_chunks = 0;
5336         sctp_key_t *new_key;
5337         uint32_t keylen;
5338         int got_random = 0, got_hmacs = 0, got_chklist = 0;
5339
5340         /* First get the destination address setup too. */
5341         memset(&sin, 0, sizeof(sin));
5342         memset(&sin6, 0, sizeof(sin6));
5343
5344         sin.sin_family = AF_INET;
5345         sin.sin_len = sizeof(sin);
5346         sin.sin_port = stcb->rport;
5347
5348         sin6.sin6_family = AF_INET6;
5349         sin6.sin6_len = sizeof(struct sockaddr_in6);
5350         sin6.sin6_port = stcb->rport;
5351         if (altsa == NULL) {
5352                 iph = mtod(m, struct ip *);
5353                 switch (iph->ip_v) {
5354                 case IPVERSION:
5355                         {
5356                                 /* its IPv4 */
5357                                 struct sockaddr_in *sin_2;
5358
5359                                 sin_2 = (struct sockaddr_in *)(local_sa);
5360                                 memset(sin_2, 0, sizeof(sin));
5361                                 sin_2->sin_family = AF_INET;
5362                                 sin_2->sin_len = sizeof(sin);
5363                                 sin_2->sin_port = sh->dest_port;
5364                                 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
5365                                 sin.sin_addr = iph->ip_src;
5366                                 sa = (struct sockaddr *)&sin;
5367                                 break;
5368                         }
5369 #ifdef INET6
5370                 case IPV6_VERSION >> 4:
5371                         {
5372                                 /* its IPv6 */
5373                                 struct ip6_hdr *ip6;
5374                                 struct sockaddr_in6 *sin6_2;
5375
5376                                 ip6 = mtod(m, struct ip6_hdr *);
5377                                 sin6_2 = (struct sockaddr_in6 *)(local_sa);
5378                                 memset(sin6_2, 0, sizeof(sin6));
5379                                 sin6_2->sin6_family = AF_INET6;
5380                                 sin6_2->sin6_len = sizeof(struct sockaddr_in6);
5381                                 sin6_2->sin6_port = sh->dest_port;
5382                                 sin6.sin6_addr = ip6->ip6_src;
5383                                 sa = (struct sockaddr *)&sin6;
5384                                 break;
5385                         }
5386 #endif
5387                 default:
5388                         sa = NULL;
5389                         break;
5390                 }
5391         } else {
5392                 /*
5393                  * For cookies we use the src address NOT from the packet
5394                  * but from the original INIT
5395                  */
5396                 sa = altsa;
5397         }
5398         /* Turn off ECN until we get through all params */
5399         stcb->asoc.ecn_allowed = 0;
5400         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5401                 /* mark all addresses that we have currently on the list */
5402                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
5403         }
5404         /* does the source address already exist? if so skip it */
5405         l_inp = inp = stcb->sctp_ep;
5406
5407         atomic_add_int(&stcb->asoc.refcnt, 1);
5408         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
5409         atomic_add_int(&stcb->asoc.refcnt, -1);
5410
5411         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
5412                 /* we must add the source address */
5413                 /* no scope set here since we have a tcb already. */
5414                 if ((sa->sa_family == AF_INET) &&
5415                     (stcb->asoc.ipv4_addr_legal)) {
5416                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
5417                                 return (-1);
5418                         }
5419                 } else if ((sa->sa_family == AF_INET6) &&
5420                     (stcb->asoc.ipv6_addr_legal)) {
5421                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
5422                                 return (-2);
5423                         }
5424                 }
5425         } else {
5426                 if (net_tmp != NULL && stcb_tmp == stcb) {
5427                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
5428                 } else if (stcb_tmp != stcb) {
5429                         /* It belongs to another association? */
5430                         if (stcb_tmp)
5431                                 SCTP_TCB_UNLOCK(stcb_tmp);
5432                         return (-3);
5433                 }
5434         }
5435         if (stcb->asoc.state == 0) {
5436                 /* the assoc was freed? */
5437                 return (-4);
5438         }
5439         /*
5440          * peer must explicitly turn this on. This may have been initialized
5441          * to be "on" in order to allow local addr changes while INIT's are
5442          * in flight.
5443          */
5444         stcb->asoc.peer_supports_asconf = 0;
5445         /* now we must go through each of the params. */
5446         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
5447         while (phdr) {
5448                 ptype = ntohs(phdr->param_type);
5449                 plen = ntohs(phdr->param_length);
5450                 /*
5451                  * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
5452                  * (int)plen);
5453                  */
5454                 if (offset + plen > limit) {
5455                         break;
5456                 }
5457                 if (plen == 0) {
5458                         break;
5459                 }
5460                 if (ptype == SCTP_IPV4_ADDRESS) {
5461                         if (stcb->asoc.ipv4_addr_legal) {
5462                                 struct sctp_ipv4addr_param *p4, p4_buf;
5463
5464                                 /* ok get the v4 address and check/add */
5465                                 phdr = sctp_get_next_param(m, offset,
5466                                     (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5467                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5468                                     phdr == NULL) {
5469                                         return (-5);
5470                                 }
5471                                 p4 = (struct sctp_ipv4addr_param *)phdr;
5472                                 sin.sin_addr.s_addr = p4->addr;
5473                                 if (IN_MULTICAST(sin.sin_addr.s_addr)) {
5474                                         /* Skip multi-cast addresses */
5475                                         goto next_param;
5476                                 }
5477                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
5478                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
5479                                         goto next_param;
5480                                 }
5481                                 sa = (struct sockaddr *)&sin;
5482                                 inp = stcb->sctp_ep;
5483                                 atomic_add_int(&stcb->asoc.refcnt, 1);
5484                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
5485                                     local_sa, stcb);
5486                                 atomic_add_int(&stcb->asoc.refcnt, -1);
5487
5488                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
5489                                     inp == NULL) {
5490                                         /* we must add the source address */
5491                                         /*
5492                                          * no scope set since we have a tcb
5493                                          * already
5494                                          */
5495
5496                                         /*
5497                                          * we must validate the state again
5498                                          * here
5499                                          */
5500                                         if (stcb->asoc.state == 0) {
5501                                                 /* the assoc was freed? */
5502                                                 return (-7);
5503                                         }
5504                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
5505                                                 return (-8);
5506                                         }
5507                                 } else if (stcb_tmp == stcb) {
5508                                         if (stcb->asoc.state == 0) {
5509                                                 /* the assoc was freed? */
5510                                                 return (-10);
5511                                         }
5512                                         if (net != NULL) {
5513                                                 /* clear flag */
5514                                                 net->dest_state &=
5515                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
5516                                         }
5517                                 } else {
5518                                         /*
5519                                          * strange, address is in another
5520                                          * assoc? straighten out locks.
5521                                          */
5522                                         if (stcb_tmp)
5523                                                 SCTP_TCB_UNLOCK(stcb_tmp);
5524
5525                                         if (stcb->asoc.state == 0) {
5526                                                 /* the assoc was freed? */
5527                                                 return (-12);
5528                                         }
5529                                         return (-13);
5530                                 }
5531                         }
5532                 } else if (ptype == SCTP_IPV6_ADDRESS) {
5533                         if (stcb->asoc.ipv6_addr_legal) {
5534                                 /* ok get the v6 address and check/add */
5535                                 struct sctp_ipv6addr_param *p6, p6_buf;
5536
5537                                 phdr = sctp_get_next_param(m, offset,
5538                                     (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5539                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5540                                     phdr == NULL) {
5541                                         return (-14);
5542                                 }
5543                                 p6 = (struct sctp_ipv6addr_param *)phdr;
5544                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5545                                     sizeof(p6->addr));
5546                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
5547                                         /* Skip multi-cast addresses */
5548                                         goto next_param;
5549                                 }
5550                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
5551                                         /*
5552                                          * Link local make no sense without
5553                                          * scope
5554                                          */
5555                                         goto next_param;
5556                                 }
5557                                 sa = (struct sockaddr *)&sin6;
5558                                 inp = stcb->sctp_ep;
5559                                 atomic_add_int(&stcb->asoc.refcnt, 1);
5560                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
5561                                     local_sa, stcb);
5562                                 atomic_add_int(&stcb->asoc.refcnt, -1);
5563                                 if (stcb_tmp == NULL && (inp == stcb->sctp_ep ||
5564                                     inp == NULL)) {
5565                                         /*
5566                                          * we must validate the state again
5567                                          * here
5568                                          */
5569                                         if (stcb->asoc.state == 0) {
5570                                                 /* the assoc was freed? */
5571                                                 return (-16);
5572                                         }
5573                                         /*
5574                                          * we must add the address, no scope
5575                                          * set
5576                                          */
5577                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
5578                                                 return (-17);
5579                                         }
5580                                 } else if (stcb_tmp == stcb) {
5581                                         /*
5582                                          * we must validate the state again
5583                                          * here
5584                                          */
5585                                         if (stcb->asoc.state == 0) {
5586                                                 /* the assoc was freed? */
5587                                                 return (-19);
5588                                         }
5589                                         if (net != NULL) {
5590                                                 /* clear flag */
5591                                                 net->dest_state &=
5592                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
5593                                         }
5594                                 } else {
5595                                         /*
5596                                          * strange, address is in another
5597                                          * assoc? straighten out locks.
5598                                          */
5599                                         if (stcb_tmp)
5600                                                 SCTP_TCB_UNLOCK(stcb_tmp);
5601
5602                                         if (stcb->asoc.state == 0) {
5603                                                 /* the assoc was freed? */
5604                                                 return (-21);
5605                                         }
5606                                         return (-22);
5607                                 }
5608                         }
5609                 } else if (ptype == SCTP_ECN_CAPABLE) {
5610                         stcb->asoc.ecn_allowed = 1;
5611                 } else if (ptype == SCTP_ULP_ADAPTATION) {
5612                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
5613                                 struct sctp_adaptation_layer_indication ai,
5614                                                                 *aip;
5615
5616                                 phdr = sctp_get_next_param(m, offset,
5617                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
5618                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
5619                                 if (aip) {
5620                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
5621                                         stcb->asoc.adaptation_needed = 1;
5622                                 }
5623                         }
5624                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
5625                         struct sctp_asconf_addr_param lstore, *fee;
5626                         struct sctp_asconf_addrv4_param *fii;
5627                         int lptype;
5628                         struct sockaddr *lsa = NULL;
5629
5630                         stcb->asoc.peer_supports_asconf = 1;
5631                         if (plen > sizeof(lstore)) {
5632                                 return (-23);
5633                         }
5634                         phdr = sctp_get_next_param(m, offset,
5635                             (struct sctp_paramhdr *)&lstore, min(plen, sizeof(lstore)));
5636                         if (phdr == NULL) {
5637                                 return (-24);
5638                         }
5639                         fee = (struct sctp_asconf_addr_param *)phdr;
5640                         lptype = ntohs(fee->addrp.ph.param_type);
5641                         if (lptype == SCTP_IPV4_ADDRESS) {
5642                                 if (plen !=
5643                                     sizeof(struct sctp_asconf_addrv4_param)) {
5644                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
5645                                             (int)sizeof(struct sctp_asconf_addrv4_param),
5646                                             plen);
5647                                 } else {
5648                                         fii = (struct sctp_asconf_addrv4_param *)fee;
5649                                         sin.sin_addr.s_addr = fii->addrp.addr;
5650                                         lsa = (struct sockaddr *)&sin;
5651                                 }
5652                         } else if (lptype == SCTP_IPV6_ADDRESS) {
5653                                 if (plen !=
5654                                     sizeof(struct sctp_asconf_addr_param)) {
5655                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
5656                                             (int)sizeof(struct sctp_asconf_addr_param),
5657                                             plen);
5658                                 } else {
5659                                         memcpy(sin6.sin6_addr.s6_addr,
5660                                             fee->addrp.addr,
5661                                             sizeof(fee->addrp.addr));
5662                                         lsa = (struct sockaddr *)&sin6;
5663                                 }
5664                         }
5665                         if (lsa) {
5666                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
5667                         }
5668                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
5669                         /* Peer supports pr-sctp */
5670                         stcb->asoc.peer_supports_prsctp = 1;
5671                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
5672                         /* A supported extension chunk */
5673                         struct sctp_supported_chunk_types_param *pr_supported;
5674                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
5675                         int num_ent, i;
5676
5677                         phdr = sctp_get_next_param(m, offset,
5678                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
5679                         if (phdr == NULL) {
5680                                 return (-25);
5681                         }
5682                         stcb->asoc.peer_supports_asconf = 0;
5683                         stcb->asoc.peer_supports_prsctp = 0;
5684                         stcb->asoc.peer_supports_pktdrop = 0;
5685                         stcb->asoc.peer_supports_strreset = 0;
5686                         stcb->asoc.peer_supports_auth = 0;
5687                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
5688                         num_ent = plen - sizeof(struct sctp_paramhdr);
5689                         for (i = 0; i < num_ent; i++) {
5690                                 switch (pr_supported->chunk_types[i]) {
5691                                 case SCTP_ASCONF:
5692                                 case SCTP_ASCONF_ACK:
5693                                         stcb->asoc.peer_supports_asconf = 1;
5694                                         break;
5695                                 case SCTP_FORWARD_CUM_TSN:
5696                                         stcb->asoc.peer_supports_prsctp = 1;
5697                                         break;
5698                                 case SCTP_PACKET_DROPPED:
5699                                         stcb->asoc.peer_supports_pktdrop = 1;
5700                                         break;
5701                                 case SCTP_STREAM_RESET:
5702                                         stcb->asoc.peer_supports_strreset = 1;
5703                                         break;
5704                                 case SCTP_AUTHENTICATION:
5705                                         stcb->asoc.peer_supports_auth = 1;
5706                                         break;
5707                                 default:
5708                                         /* one I have not learned yet */
5709                                         break;
5710
5711                                 }
5712                         }
5713                 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
5714                         /* Peer supports ECN-nonce */
5715                         stcb->asoc.peer_supports_ecn_nonce = 1;
5716                         stcb->asoc.ecn_nonce_allowed = 1;
5717                 } else if (ptype == SCTP_RANDOM) {
5718                         if (plen > sizeof(random_store))
5719                                 break;
5720                         if (got_random) {
5721                                 /* already processed a RANDOM */
5722                                 goto next_param;
5723                         }
5724                         phdr = sctp_get_next_param(m, offset,
5725                             (struct sctp_paramhdr *)random_store,
5726                             min(sizeof(random_store), plen));
5727                         if (phdr == NULL)
5728                                 return (-26);
5729                         p_random = (struct sctp_auth_random *)phdr;
5730                         random_len = plen - sizeof(*p_random);
5731                         /* enforce the random length */
5732                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
5733                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
5734                                 return (-27);
5735                         }
5736                         got_random = 1;
5737                 } else if (ptype == SCTP_HMAC_LIST) {
5738                         int num_hmacs;
5739                         int i;
5740
5741                         if (plen > sizeof(hmacs_store))
5742                                 break;
5743                         if (got_hmacs) {
5744                                 /* already processed a HMAC list */
5745                                 goto next_param;
5746                         }
5747                         phdr = sctp_get_next_param(m, offset,
5748                             (struct sctp_paramhdr *)hmacs_store,
5749                             min(plen, sizeof(hmacs_store)));
5750                         if (phdr == NULL)
5751                                 return (-28);
5752                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
5753                         hmacs_len = plen - sizeof(*hmacs);
5754                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
5755                         /* validate the hmac list */
5756                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
5757                                 return (-29);
5758                         }
5759                         if (stcb->asoc.peer_hmacs != NULL)
5760                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
5761                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
5762                         if (stcb->asoc.peer_hmacs != NULL) {
5763                                 for (i = 0; i < num_hmacs; i++) {
5764                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
5765                                             ntohs(hmacs->hmac_ids[i]));
5766                                 }
5767                         }
5768                         got_hmacs = 1;
5769                 } else if (ptype == SCTP_CHUNK_LIST) {
5770                         int i;
5771
5772                         if (plen > sizeof(chunks_store))
5773                                 break;
5774                         if (got_chklist) {
5775                                 /* already processed a Chunks list */
5776                                 goto next_param;
5777                         }
5778                         phdr = sctp_get_next_param(m, offset,
5779                             (struct sctp_paramhdr *)chunks_store,
5780                             min(plen, sizeof(chunks_store)));
5781                         if (phdr == NULL)
5782                                 return (-30);
5783                         chunks = (struct sctp_auth_chunk_list *)phdr;
5784                         num_chunks = plen - sizeof(*chunks);
5785                         if (stcb->asoc.peer_auth_chunks != NULL)
5786                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
5787                         else
5788                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
5789                         for (i = 0; i < num_chunks; i++) {
5790                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
5791                                     stcb->asoc.peer_auth_chunks);
5792                                 /* record asconf/asconf-ack if listed */
5793                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
5794                                         saw_asconf = 1;
5795                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
5796                                         saw_asconf_ack = 1;
5797
5798                         }
5799                         got_chklist = 1;
5800                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
5801                             (ptype == SCTP_STATE_COOKIE) ||
5802                             (ptype == SCTP_UNRECOG_PARAM) ||
5803                             (ptype == SCTP_COOKIE_PRESERVE) ||
5804                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
5805                             (ptype == SCTP_ADD_IP_ADDRESS) ||
5806                             (ptype == SCTP_DEL_IP_ADDRESS) ||
5807                             (ptype == SCTP_ERROR_CAUSE_IND) ||
5808                     (ptype == SCTP_SUCCESS_REPORT)) {
5809                          /* don't care */ ;
5810                 } else {
5811                         if ((ptype & 0x8000) == 0x0000) {
5812                                 /*
5813                                  * must stop processing the rest of the
5814                                  * param's. Any report bits were handled
5815                                  * with the call to
5816                                  * sctp_arethere_unrecognized_parameters()
5817                                  * when the INIT or INIT-ACK was first seen.
5818                                  */
5819                                 break;
5820                         }
5821                 }
5822 next_param:
5823                 offset += SCTP_SIZE32(plen);
5824                 if (offset >= limit) {
5825                         break;
5826                 }
5827                 phdr = sctp_get_next_param(m, offset, &parm_buf,
5828                     sizeof(parm_buf));
5829         }
5830         /* Now check to see if we need to purge any addresses */
5831         for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
5832                 net_tmp = TAILQ_NEXT(net, sctp_next);
5833                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
5834                     SCTP_ADDR_NOT_IN_ASSOC) {
5835                         /* This address has been removed from the asoc */
5836                         /* remove and free it */
5837                         stcb->asoc.numnets--;
5838                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
5839                         sctp_free_remote_addr(net);
5840                         if (net == stcb->asoc.primary_destination) {
5841                                 stcb->asoc.primary_destination = NULL;
5842                                 sctp_select_primary_destination(stcb);
5843                         }
5844                 }
5845         }
5846         /* validate authentication required parameters */
5847         if (got_random && got_hmacs) {
5848                 stcb->asoc.peer_supports_auth = 1;
5849         } else {
5850                 stcb->asoc.peer_supports_auth = 0;
5851         }
5852         if (!stcb->asoc.peer_supports_auth && got_chklist) {
5853                 /* peer does not support auth but sent a chunks list? */
5854                 return (-31);
5855         }
5856         if (!sctp_asconf_auth_nochk && stcb->asoc.peer_supports_asconf &&
5857             !stcb->asoc.peer_supports_auth) {
5858                 /* peer supports asconf but not auth? */
5859                 return (-32);
5860         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
5861             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
5862                 return (-33);
5863         }
5864         /* concatenate the full random key */
5865 #ifdef SCTP_AUTH_DRAFT_04
5866         keylen = random_len;
5867         new_key = sctp_alloc_key(keylen);
5868         if (new_key != NULL) {
5869                 /* copy in the RANDOM */
5870                 if (p_random != NULL)
5871                         bcopy(p_random->random_data, new_key->key, random_len);
5872         }
5873 #else
5874         keylen = sizeof(*p_random) + random_len + sizeof(*chunks) + num_chunks +
5875             sizeof(*hmacs) + hmacs_len;
5876         new_key = sctp_alloc_key(keylen);
5877         if (new_key != NULL) {
5878                 /* copy in the RANDOM */
5879                 if (p_random != NULL) {
5880                         keylen = sizeof(*p_random) + random_len;
5881                         bcopy(p_random, new_key->key, keylen);
5882                 }
5883                 /* append in the AUTH chunks */
5884                 if (chunks != NULL) {
5885                         bcopy(chunks, new_key->key + keylen,
5886                             sizeof(*chunks) + num_chunks);
5887                         keylen += sizeof(*chunks) + num_chunks;
5888                 }
5889                 /* append in the HMACs */
5890                 if (hmacs != NULL) {
5891                         bcopy(hmacs, new_key->key + keylen,
5892                             sizeof(*hmacs) + hmacs_len);
5893                 }
5894         }
5895 #endif
5896         else {
5897                 /* failed to get memory for the key */
5898                 return (-34);
5899         }
5900         if (stcb->asoc.authinfo.peer_random != NULL)
5901                 sctp_free_key(stcb->asoc.authinfo.peer_random);
5902         stcb->asoc.authinfo.peer_random = new_key;
5903 #ifdef SCTP_AUTH_DRAFT_04
5904         /* don't include the chunks and hmacs for draft -04 */
5905         stcb->asoc.authinfo.peer_random->keylen = random_len;
5906 #endif
5907         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
5908         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
5909
5910         return (0);
5911 }
5912
5913 int
5914 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
5915     struct sctp_nets *net)
5916 {
5917         /* make sure the requested primary address exists in the assoc */
5918         if (net == NULL && sa)
5919                 net = sctp_findnet(stcb, sa);
5920
5921         if (net == NULL) {
5922                 /* didn't find the requested primary address! */
5923                 return (-1);
5924         } else {
5925                 /* set the primary address */
5926                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
5927                         /* Must be confirmed, so queue to set */
5928                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
5929                         return (0);
5930                 }
5931                 stcb->asoc.primary_destination = net;
5932                 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
5933                 net = TAILQ_FIRST(&stcb->asoc.nets);
5934                 if (net != stcb->asoc.primary_destination) {
5935                         /*
5936                          * first one on the list is NOT the primary
5937                          * sctp_cmpaddr() is much more efficent if the
5938                          * primary is the first on the list, make it so.
5939                          */
5940                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
5941                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
5942                 }
5943                 return (0);
5944         }
5945 }
5946
5947 int
5948 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, struct timeval *now, int save_in_twait)
5949 {
5950         /*
5951          * This function serves two purposes. It will see if a TAG can be
5952          * re-used and return 1 for yes it is ok and 0 for don't use that
5953          * tag. A secondary function it will do is purge out old tags that
5954          * can be removed.
5955          */
5956         struct sctpasochead *head;
5957         struct sctpvtaghead *chain;
5958         struct sctp_tagblock *twait_block;
5959         struct sctp_tcb *stcb;
5960         int i;
5961
5962         SCTP_INP_INFO_WLOCK();
5963         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
5964         /* First is the vtag in use ? */
5965
5966         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag,
5967             sctppcbinfo.hashasocmark)];
5968         if (head == NULL) {
5969                 goto check_restart;
5970         }
5971         LIST_FOREACH(stcb, head, sctp_asocs) {
5972
5973                 if (stcb->asoc.my_vtag == tag) {
5974                         /*
5975                          * We should remove this if and return 0 always if
5976                          * we want vtags unique across all endpoints. For
5977                          * now within a endpoint is ok.
5978                          */
5979                         if (inp == stcb->sctp_ep) {
5980                                 /* bad tag, in use */
5981                                 SCTP_INP_INFO_WUNLOCK();
5982                                 return (0);
5983                         }
5984                 }
5985         }
5986 check_restart:
5987         /* Now lets check the restart hash */
5988         head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(tag,
5989             sctppcbinfo.hashrestartmark)];
5990         if (head == NULL) {
5991                 goto check_time_wait;
5992         }
5993         LIST_FOREACH(stcb, head, sctp_tcbrestarhash) {
5994                 if (stcb->asoc.assoc_id == tag) {
5995                         /* candidate */
5996                         if (inp == stcb->sctp_ep) {
5997                                 /* bad tag, in use */
5998                                 SCTP_INP_INFO_WUNLOCK();
5999                                 return (0);
6000                         }
6001                 }
6002         }
6003 check_time_wait:
6004         /* Now what about timed wait ? */
6005         if (!SCTP_LIST_EMPTY(chain)) {
6006                 /*
6007                  * Block(s) are present, lets see if we have this tag in the
6008                  * list
6009                  */
6010                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6011                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6012                                 if (twait_block->vtag_block[i].v_tag == 0) {
6013                                         /* not used */
6014                                         continue;
6015                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6016                                     now->tv_sec) {
6017                                         /* Audit expires this guy */
6018                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
6019                                         twait_block->vtag_block[i].v_tag = 0;
6020                                 } else if (twait_block->vtag_block[i].v_tag ==
6021                                     tag) {
6022                                         /* Bad tag, sorry :< */
6023                                         SCTP_INP_INFO_WUNLOCK();
6024                                         return (0);
6025                                 }
6026                         }
6027                 }
6028         }
6029         /*-
6030          * Not found, ok to use the tag, add it to the time wait hash
6031          * as well this will prevent two sucessive cookies from getting
6032          * the same tag or two inits sent quickly on multi-processors.
6033          * We only keep the tag for the life of a cookie and when we
6034          * add this tag to the assoc hash we need to purge it from
6035          * the t-wait hash.
6036          */
6037         if (save_in_twait)
6038                 sctp_add_vtag_to_timewait(tag, TICKS_TO_SEC(inp->sctp_ep.def_cookie_life));
6039         SCTP_INP_INFO_WUNLOCK();
6040         return (1);
6041 }
6042
6043
6044 static sctp_assoc_t reneged_asoc_ids[256];
6045 static uint8_t reneged_at = 0;
6046
6047
6048 static void
6049 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
6050 {
6051         /*
6052          * We must hunt this association for MBUF's past the cumack (i.e.
6053          * out of order data that we can renege on).
6054          */
6055         struct sctp_association *asoc;
6056         struct sctp_tmit_chunk *chk, *nchk;
6057         uint32_t cumulative_tsn_p1, tsn;
6058         struct sctp_queued_to_read *ctl, *nctl;
6059         int cnt, strmat, gap;
6060
6061         /* We look for anything larger than the cum-ack + 1 */
6062
6063         SCTP_STAT_INCR(sctps_protocol_drain_calls);
6064         if (sctp_do_drain == 0) {
6065                 return;
6066         }
6067         asoc = &stcb->asoc;
6068         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6069                 /* none we can reneg on. */
6070                 return;
6071         }
6072         SCTP_STAT_INCR(sctps_protocol_drains_done);
6073         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6074         cnt = 0;
6075         /* First look in the re-assembly queue */
6076         chk = TAILQ_FIRST(&asoc->reasmqueue);
6077         while (chk) {
6078                 /* Get the next one */
6079                 nchk = TAILQ_NEXT(chk, sctp_next);
6080                 if (compare_with_wrap(chk->rec.data.TSN_seq,
6081                     cumulative_tsn_p1, MAX_TSN)) {
6082                         /* Yep it is above cum-ack */
6083                         cnt++;
6084                         tsn = chk->rec.data.TSN_seq;
6085                         if (tsn >= asoc->mapping_array_base_tsn) {
6086                                 gap = tsn - asoc->mapping_array_base_tsn;
6087                         } else {
6088                                 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
6089                                     tsn + 1;
6090                         }
6091                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6092                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6093                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6094                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6095                         if (chk->data) {
6096                                 sctp_m_freem(chk->data);
6097                                 chk->data = NULL;
6098                         }
6099                         sctp_free_a_chunk(stcb, chk);
6100                 }
6101                 chk = nchk;
6102         }
6103         /* Ok that was fun, now we will drain all the inbound streams? */
6104         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6105                 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
6106                 while (ctl) {
6107                         nctl = TAILQ_NEXT(ctl, next);
6108                         if (compare_with_wrap(ctl->sinfo_tsn,
6109                             cumulative_tsn_p1, MAX_TSN)) {
6110                                 /* Yep it is above cum-ack */
6111                                 cnt++;
6112                                 tsn = ctl->sinfo_tsn;
6113                                 if (tsn >= asoc->mapping_array_base_tsn) {
6114                                         gap = tsn -
6115                                             asoc->mapping_array_base_tsn;
6116                                 } else {
6117                                         gap = (MAX_TSN -
6118                                             asoc->mapping_array_base_tsn) +
6119                                             tsn + 1;
6120                                 }
6121                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6122                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6123
6124                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array,
6125                                     gap);
6126                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue,
6127                                     ctl, next);
6128                                 if (ctl->data) {
6129                                         sctp_m_freem(ctl->data);
6130                                         ctl->data = NULL;
6131                                 }
6132                                 sctp_free_remote_addr(ctl->whoFrom);
6133                                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl);
6134                                 SCTP_DECR_READQ_COUNT();
6135                         }
6136                         ctl = nctl;
6137                 }
6138         }
6139         /*
6140          * Question, should we go through the delivery queue? The only
6141          * reason things are on here is the app not reading OR a p-d-api up.
6142          * An attacker COULD send enough in to initiate the PD-API and then
6143          * send a bunch of stuff to other streams... these would wind up on
6144          * the delivery queue.. and then we would not get to them. But in
6145          * order to do this I then have to back-track and un-deliver
6146          * sequence numbers in streams.. el-yucko. I think for now we will
6147          * NOT look at the delivery queue and leave it to be something to
6148          * consider later. An alternative would be to abort the P-D-API with
6149          * a notification and then deliver the data.... Or another method
6150          * might be to keep track of how many times the situation occurs and
6151          * if we see a possible attack underway just abort the association.
6152          */
6153 #ifdef SCTP_DEBUG
6154         if (cnt) {
6155                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6156         }
6157 #endif
6158         if (cnt) {
6159                 /*
6160                  * Now do we need to find a new
6161                  * asoc->highest_tsn_inside_map?
6162                  */
6163                 if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) {
6164                         gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn;
6165                 } else {
6166                         gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
6167                             asoc->highest_tsn_inside_map + 1;
6168                 }
6169                 if (gap >= (asoc->mapping_array_size << 3)) {
6170                         /*
6171                          * Something bad happened or cum-ack and high were
6172                          * behind the base, but if so earlier checks should
6173                          * have found NO data... wierd... we will start at
6174                          * end of mapping array.
6175                          */
6176                         SCTP_PRINTF("Gap was larger than array?? %d set to max:%d maparraymax:%x\n",
6177                             (int)gap,
6178                             (int)(asoc->mapping_array_size << 3),
6179                             (int)asoc->highest_tsn_inside_map);
6180                         gap = asoc->mapping_array_size << 3;
6181                 }
6182                 while (gap > 0) {
6183                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6184                                 /* found the new highest */
6185                                 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap;
6186                                 break;
6187                         }
6188                         gap--;
6189                 }
6190                 if (gap == 0) {
6191                         /* Nothing left in map */
6192                         memset(asoc->mapping_array, 0, asoc->mapping_array_size);
6193                         asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1;
6194                         asoc->highest_tsn_inside_map = asoc->cumulative_tsn;
6195                 }
6196                 asoc->last_revoke_count = cnt;
6197                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6198                 /* sa_ignore NO_NULL_CHK */
6199                 sctp_send_sack(stcb);
6200                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6201                 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
6202                 reneged_at++;
6203         }
6204         /*
6205          * Another issue, in un-setting the TSN's in the mapping array we
6206          * DID NOT adjust the higest_tsn marker.  This will cause one of two
6207          * things to occur. It may cause us to do extra work in checking for
6208          * our mapping array movement. More importantly it may cause us to
6209          * SACK every datagram. This may not be a bad thing though since we
6210          * will recover once we get our cum-ack above and all this stuff we
6211          * dumped recovered.
6212          */
6213 }
6214
6215 void
6216 sctp_drain()
6217 {
6218         /*
6219          * We must walk the PCB lists for ALL associations here. The system
6220          * is LOW on MBUF's and needs help. This is where reneging will
6221          * occur. We really hope this does NOT happen!
6222          */
6223         struct sctp_inpcb *inp;
6224         struct sctp_tcb *stcb;
6225
6226         SCTP_INP_INFO_RLOCK();
6227         LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
6228                 /* For each endpoint */
6229                 SCTP_INP_RLOCK(inp);
6230                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6231                         /* For each association */
6232                         SCTP_TCB_LOCK(stcb);
6233                         sctp_drain_mbufs(inp, stcb);
6234                         SCTP_TCB_UNLOCK(stcb);
6235                 }
6236                 SCTP_INP_RUNLOCK(inp);
6237         }
6238         SCTP_INP_INFO_RUNLOCK();
6239 }
6240
6241 /*
6242  * start a new iterator
6243  * iterates through all endpoints and associations based on the pcb_state
6244  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6245  * assocs and "ef" (optional) is executed when the iterator completes.
6246  * "inpf" (optional) is executed for each new endpoint as it is being
6247  * iterated through. inpe (optional) is called when the inp completes
6248  * its way through all the stcbs.
6249  */
6250 int
6251 sctp_initiate_iterator(inp_func inpf,
6252     asoc_func af,
6253     inp_func inpe,
6254     uint32_t pcb_state,
6255     uint32_t pcb_features,
6256     uint32_t asoc_state,
6257     void *argp,
6258     uint32_t argi,
6259     end_func ef,
6260     struct sctp_inpcb *s_inp,
6261     uint8_t chunk_output_off)
6262 {
6263         struct sctp_iterator *it = NULL;
6264
6265         if (af == NULL) {
6266                 return (-1);
6267         }
6268         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6269             SCTP_M_ITER);
6270         if (it == NULL) {
6271                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6272                 return (ENOMEM);
6273         }
6274         memset(it, 0, sizeof(*it));
6275         it->function_assoc = af;
6276         it->function_inp = inpf;
6277         if (inpf)
6278                 it->done_current_ep = 0;
6279         else
6280                 it->done_current_ep = 1;
6281         it->function_atend = ef;
6282         it->pointer = argp;
6283         it->val = argi;
6284         it->pcb_flags = pcb_state;
6285         it->pcb_features = pcb_features;
6286         it->asoc_state = asoc_state;
6287         it->function_inp_end = inpe;
6288         it->no_chunk_output = chunk_output_off;
6289         if (s_inp) {
6290                 it->inp = s_inp;
6291                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
6292         } else {
6293                 SCTP_INP_INFO_RLOCK();
6294                 it->inp = LIST_FIRST(&sctppcbinfo.listhead);
6295
6296                 SCTP_INP_INFO_RUNLOCK();
6297                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
6298
6299         }
6300         SCTP_IPI_ITERATOR_WQ_LOCK();
6301         if (it->inp) {
6302                 SCTP_INP_INCR_REF(it->inp);
6303         }
6304         TAILQ_INSERT_TAIL(&sctppcbinfo.iteratorhead, it, sctp_nxt_itr);
6305 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
6306         if (sctppcbinfo.iterator_running == 0) {
6307                 sctp_wakeup_iterator();
6308         }
6309         SCTP_IPI_ITERATOR_WQ_UNLOCK();
6310 #else
6311         if (it->inp)
6312                 SCTP_INP_DECR_REF(it->inp);
6313         SCTP_IPI_ITERATOR_WQ_UNLOCK();
6314         /* Init the timer */
6315         SCTP_OS_TIMER_INIT(&it->tmr.timer);
6316         /* add to the list of all iterators */
6317         sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it,
6318             NULL, NULL);
6319 #endif
6320         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
6321         return (0);
6322 }