sys/netinet/sctp_pcb.c

   1 /*-
   2  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
   3  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
   4  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * a) Redistributions of source code must retain the above copyright notice,
  10  *    this list of conditions and the following disclaimer.
  11  *
  12  * b) Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the distribution.
  15  *
  16  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  30  * THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35
  36 #include <netinet/sctp_os.h>
  37 #include <sys/proc.h>
  38 #include <netinet/sctp_var.h>
  39 #include <netinet/sctp_sysctl.h>
  40 #include <netinet/sctp_pcb.h>
  41 #include <netinet/sctputil.h>
  42 #include <netinet/sctp.h>
  43 #include <netinet/sctp_header.h>
  44 #include <netinet/sctp_asconf.h>
  45 #include <netinet/sctp_output.h>
  46 #include <netinet/sctp_timer.h>
  47 #include <netinet/sctp_bsd_addr.h>
  48 #include <netinet/sctp_dtrace_define.h>
  49 #if defined(INET) || defined(INET6)
  50 #include <netinet/udp.h>
  51 #endif
  52 #ifdef INET6
  53 #include <netinet6/ip6_var.h>
  54 #endif
  55 #include <sys/sched.h>
  56 #include <sys/smp.h>
  57 #include <sys/unistd.h>
  58
  59
  60 VNET_DEFINE(struct sctp_base_info, system_base_info);
  61
  62 /* FIX: we don't handle multiple link local scopes */
  63 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  64 #ifdef INET6
  65 int
  66 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  67 {
  68         struct sockaddr_in6 tmp_a, tmp_b;
  69
  70         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  71         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  72                 return (0);
  73         }
  74         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  75         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  76                 return (0);
  77         }
  78         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  79 }
  80
  81 #endif
  82
  83 void
  84 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  85 {
  86         /*
  87          * We really don't need to lock this, but I will just because it
  88          * does not hurt.
  89          */
  90         SCTP_INP_INFO_RLOCK();
  91         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  92         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  93         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  94         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  95         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  96         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  97         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  98         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
  99         SCTP_INP_INFO_RUNLOCK();
 100 }
 101
 102 /*-
 103  * Addresses are added to VRF's (Virtual Router's). For BSD we
 104  * have only the default VRF 0. We maintain a hash list of
 105  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
 106  * these has a list of addresses. When we add a new address
 107  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 108  * not exist we create it and add it to the list of IFN's
 109  * within the VRF. Once we have the sctp_ifn, we add the
 110  * address to the list. So we look something like:
 111  *
 112  * hash-vrf-table
 113  *   vrf-> ifn-> ifn -> ifn
 114  *   vrf    |
 115  *    ...   +--ifa-> ifa -> ifa
 116  *   vrf
 117  *
 118  * We keep these separate lists since the SCTP subsystem will
 119  * point to these from its source address selection nets structure.
 120  * When an address is deleted it does not happen right away on
 121  * the SCTP side, it gets scheduled. What we do when a
 122  * delete happens is immediately remove the address from
 123  * the master list and decrement the refcount. As our
 124  * addip iterator works through and frees the src address
 125  * selection pointing to the sctp_ifa, eventually the refcount
 126  * will reach 0 and we will delete it. Note that it is assumed
 127  * that any locking on system level ifn/ifa is done at the
 128  * caller of these functions and these routines will only
 129  * lock the SCTP structures as they add or delete things.
 130  *
 131  * Other notes on VRF concepts.
 132  *  - An endpoint can be in multiple VRF's
 133  *  - An association lives within a VRF and only one VRF.
 134  *  - Any incoming packet we can deduce the VRF for by
 135  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 136  *  - Any downward send call or connect call must supply the
 137  *    VRF via ancillary data or via some sort of set default
 138  *    VRF socket option call (again for BSD no brainer since
 139  *    the VRF is always 0).
 140  *  - An endpoint may add multiple VRF's to it.
 141  *  - Listening sockets can accept associations in any
 142  *    of the VRF's they are in but the assoc will end up
 143  *    in only one VRF (gotten from the packet or connect/send).
 144  *
 145  */
 146
 147 struct sctp_vrf *
 148 sctp_allocate_vrf(int vrf_id)
 149 {
 150         struct sctp_vrf *vrf = NULL;
 151         struct sctp_vrflist *bucket;
 152
 153         /* First allocate the VRF structure */
 154         vrf = sctp_find_vrf(vrf_id);
 155         if (vrf) {
 156                 /* Already allocated */
 157                 return (vrf);
 158         }
 159         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 160             SCTP_M_VRF);
 161         if (vrf == NULL) {
 162                 /* No memory */
 163 #ifdef INVARIANTS
 164                 panic("No memory for VRF:%d", vrf_id);
 165 #endif
 166                 return (NULL);
 167         }
 168         /* setup the VRF */
 169         memset(vrf, 0, sizeof(struct sctp_vrf));
 170         vrf->vrf_id = vrf_id;
 171         LIST_INIT(&vrf->ifnlist);
 172         vrf->total_ifa_count = 0;
 173         vrf->refcount = 0;
 174         /* now also setup table ids */
 175         SCTP_INIT_VRF_TABLEID(vrf);
 176         /* Init the HASH of addresses */
 177         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 178             &vrf->vrf_addr_hashmark);
 179         if (vrf->vrf_addr_hash == NULL) {
 180                 /* No memory */
 181 #ifdef INVARIANTS
 182                 panic("No memory for VRF:%d", vrf_id);
 183 #endif
 184                 SCTP_FREE(vrf, SCTP_M_VRF);
 185                 return (NULL);
 186         }
 187         /* Add it to the hash table */
 188         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 189         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 190         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 191         return (vrf);
 192 }
 193
 194
 195 struct sctp_ifn *
 196 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 197 {
 198         struct sctp_ifn *sctp_ifnp;
 199         struct sctp_ifnlist *hash_ifn_head;
 200
 201         /*
 202          * We assume the lock is held for the addresses if that's wrong
 203          * problems could occur :-)
 204          */
 205         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 206         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 207                 if (sctp_ifnp->ifn_index == ifn_index) {
 208                         return (sctp_ifnp);
 209                 }
 210                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 211                         return (sctp_ifnp);
 212                 }
 213         }
 214         return (NULL);
 215 }
 216
 217
 218 struct sctp_vrf *
 219 sctp_find_vrf(uint32_t vrf_id)
 220 {
 221         struct sctp_vrflist *bucket;
 222         struct sctp_vrf *liste;
 223
 224         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 225         LIST_FOREACH(liste, bucket, next_vrf) {
 226                 if (vrf_id == liste->vrf_id) {
 227                         return (liste);
 228                 }
 229         }
 230         return (NULL);
 231 }
 232
 233
 234 void
 235 sctp_free_vrf(struct sctp_vrf *vrf)
 236 {
 237         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 238                 if (vrf->vrf_addr_hash) {
 239                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 240                         vrf->vrf_addr_hash = NULL;
 241                 }
 242                 /* We zero'd the count */
 243                 LIST_REMOVE(vrf, next_vrf);
 244                 SCTP_FREE(vrf, SCTP_M_VRF);
 245                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 246         }
 247 }
 248
 249
 250 void
 251 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 252 {
 253         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 254                 /* We zero'd the count */
 255                 if (sctp_ifnp->vrf) {
 256                         sctp_free_vrf(sctp_ifnp->vrf);
 257                 }
 258                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 259                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 260         }
 261 }
 262
 263
 264 void
 265 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 266 {
 267         struct sctp_ifn *sctp_ifnp;
 268
 269         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 270         if (sctp_ifnp != NULL) {
 271                 sctp_ifnp->ifn_mtu = mtu;
 272         }
 273 }
 274
 275
 276 void
 277 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 278 {
 279         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 280                 /* We zero'd the count */
 281                 if (sctp_ifap->ifn_p) {
 282                         sctp_free_ifn(sctp_ifap->ifn_p);
 283                 }
 284                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 285                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 286         }
 287 }
 288
 289
 290 static void
 291 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 292 {
 293         struct sctp_ifn *found;
 294
 295         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 296         if (found == NULL) {
 297                 /* Not in the list.. sorry */
 298                 return;
 299         }
 300         if (hold_addr_lock == 0)
 301                 SCTP_IPI_ADDR_WLOCK();
 302         LIST_REMOVE(sctp_ifnp, next_bucket);
 303         LIST_REMOVE(sctp_ifnp, next_ifn);
 304         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 305             sctp_ifnp->registered_af);
 306         if (hold_addr_lock == 0)
 307                 SCTP_IPI_ADDR_WUNLOCK();
 308         /* Take away the reference, and possibly free it */
 309         sctp_free_ifn(sctp_ifnp);
 310 }
 311
 312
 313 void
 314 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 315     const char *if_name, uint32_t ifn_index)
 316 {
 317         struct sctp_vrf *vrf;
 318         struct sctp_ifa *sctp_ifap;
 319
 320         SCTP_IPI_ADDR_RLOCK();
 321         vrf = sctp_find_vrf(vrf_id);
 322         if (vrf == NULL) {
 323                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 324                 goto out;
 325
 326         }
 327         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 328         if (sctp_ifap == NULL) {
 329                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 330                 goto out;
 331         }
 332         if (sctp_ifap->ifn_p == NULL) {
 333                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 334                 goto out;
 335         }
 336         if (if_name) {
 337                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 338                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 339                             sctp_ifap->ifn_p->ifn_name, if_name);
 340                         goto out;
 341                 }
 342         } else {
 343                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 344                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 345                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 346                         goto out;
 347                 }
 348         }
 349
 350         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 351         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 352 out:
 353         SCTP_IPI_ADDR_RUNLOCK();
 354 }
 355
 356
 357 void
 358 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 359     const char *if_name, uint32_t ifn_index)
 360 {
 361         struct sctp_vrf *vrf;
 362         struct sctp_ifa *sctp_ifap;
 363
 364         SCTP_IPI_ADDR_RLOCK();
 365         vrf = sctp_find_vrf(vrf_id);
 366         if (vrf == NULL) {
 367                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 368                 goto out;
 369
 370         }
 371         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 372         if (sctp_ifap == NULL) {
 373                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 374                 goto out;
 375         }
 376         if (sctp_ifap->ifn_p == NULL) {
 377                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 378                 goto out;
 379         }
 380         if (if_name) {
 381                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 382                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 383                             sctp_ifap->ifn_p->ifn_name, if_name);
 384                         goto out;
 385                 }
 386         } else {
 387                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 388                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 389                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 390                         goto out;
 391                 }
 392         }
 393
 394         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 395         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 396 out:
 397         SCTP_IPI_ADDR_RUNLOCK();
 398 }
 399
 400
 401 /*-
 402  * Add an ifa to an ifn.
 403  * Register the interface as necessary.
 404  * NOTE: ADDR write lock MUST be held.
 405  */
 406 static void
 407 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 408 {
 409         int ifa_af;
 410
 411         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 412         sctp_ifap->ifn_p = sctp_ifnp;
 413         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 414         /* update address counts */
 415         sctp_ifnp->ifa_count++;
 416         ifa_af = sctp_ifap->address.sa.sa_family;
 417         switch (ifa_af) {
 418 #ifdef INET
 419         case AF_INET:
 420                 sctp_ifnp->num_v4++;
 421                 break;
 422 #endif
 423 #ifdef INET6
 424         case AF_INET6:
 425                 sctp_ifnp->num_v6++;
 426                 break;
 427 #endif
 428         default:
 429                 break;
 430         }
 431         if (sctp_ifnp->ifa_count == 1) {
 432                 /* register the new interface */
 433                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 434                 sctp_ifnp->registered_af = ifa_af;
 435         }
 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         LIST_REMOVE(sctp_ifap, next_ifa);
 449         if (sctp_ifap->ifn_p) {
 450                 /* update address counts */
 451                 sctp_ifap->ifn_p->ifa_count--;
 452                 switch (sctp_ifap->address.sa.sa_family) {
 453 #ifdef INET
 454                 case AF_INET:
 455                         sctp_ifap->ifn_p->num_v4--;
 456                         break;
 457 #endif
 458 #ifdef INET6
 459                 case AF_INET6:
 460                         sctp_ifap->ifn_p->num_v6--;
 461                         break;
 462 #endif
 463                 default:
 464                         break;
 465                 }
 466
 467                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 468                         /* remove the ifn, possibly freeing it */
 469                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 470                 } else {
 471                         /* re-register address family type, if needed */
 472                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 473                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 474                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 475                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 476                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 477                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 478                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 479                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 480                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 481                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 482                         }
 483                         /* free the ifn refcount */
 484                         sctp_free_ifn(sctp_ifap->ifn_p);
 485                 }
 486                 sctp_ifap->ifn_p = NULL;
 487         }
 488 }
 489
 490
 491 struct sctp_ifa *
 492 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 493     uint32_t ifn_type, const char *if_name, void *ifa,
 494     struct sockaddr *addr, uint32_t ifa_flags,
 495     int dynamic_add)
 496 {
 497         struct sctp_vrf *vrf;
 498         struct sctp_ifn *sctp_ifnp = NULL;
 499         struct sctp_ifa *sctp_ifap = NULL;
 500         struct sctp_ifalist *hash_addr_head;
 501         struct sctp_ifnlist *hash_ifn_head;
 502         uint32_t hash_of_addr;
 503         int new_ifn_af = 0;
 504
 505 #ifdef SCTP_DEBUG
 506         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 507         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 508 #endif
 509         SCTP_IPI_ADDR_WLOCK();
 510         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 511         if (sctp_ifnp) {
 512                 vrf = sctp_ifnp->vrf;
 513         } else {
 514                 vrf = sctp_find_vrf(vrf_id);
 515                 if (vrf == NULL) {
 516                         vrf = sctp_allocate_vrf(vrf_id);
 517                         if (vrf == NULL) {
 518                                 SCTP_IPI_ADDR_WUNLOCK();
 519                                 return (NULL);
 520                         }
 521                 }
 522         }
 523         if (sctp_ifnp == NULL) {
 524                 /*
 525                  * build one and add it, can't hold lock until after malloc
 526                  * done though.
 527                  */
 528                 SCTP_IPI_ADDR_WUNLOCK();
 529                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 530                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 531                 if (sctp_ifnp == NULL) {
 532 #ifdef INVARIANTS
 533                         panic("No memory for IFN");
 534 #endif
 535                         return (NULL);
 536                 }
 537                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 538                 sctp_ifnp->ifn_index = ifn_index;
 539                 sctp_ifnp->ifn_p = ifn;
 540                 sctp_ifnp->ifn_type = ifn_type;
 541                 sctp_ifnp->refcount = 0;
 542                 sctp_ifnp->vrf = vrf;
 543                 atomic_add_int(&vrf->refcount, 1);
 544                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 545                 if (if_name != NULL) {
 546                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
 547                 } else {
 548                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
 549                 }
 550                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 551                 LIST_INIT(&sctp_ifnp->ifalist);
 552                 SCTP_IPI_ADDR_WLOCK();
 553                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 554                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 555                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 556                 new_ifn_af = 1;
 557         }
 558         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 559         if (sctp_ifap) {
 560                 /* Hmm, it already exists? */
 561                 if ((sctp_ifap->ifn_p) &&
 562                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 563                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 564                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 565                             (void *)sctp_ifap);
 566                         if (new_ifn_af) {
 567                                 /* Remove the created one that we don't want */
 568                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 569                         }
 570                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 571                                 /* easy to solve, just switch back to active */
 572                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 573                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 574                                 sctp_ifap->ifn_p = sctp_ifnp;
 575                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 576                         }
 577         exit_stage_left:
 578                         SCTP_IPI_ADDR_WUNLOCK();
 579                         return (sctp_ifap);
 580                 } else {
 581                         if (sctp_ifap->ifn_p) {
 582                                 /*
 583                                  * The last IFN gets the address, remove the
 584                                  * old one
 585                                  */
 586                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 587                                     (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 588                                     sctp_ifap->ifn_p->ifn_index, if_name,
 589                                     ifn_index);
 590                                 /* remove the address from the old ifn */
 591                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 592                                 /* move the address over to the new ifn */
 593                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 594                                 goto exit_stage_left;
 595                         } else {
 596                                 /* repair ifnp which was NULL ? */
 597                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 598                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 599                                     (void *)sctp_ifnp, (void *)sctp_ifap);
 600                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 601                         }
 602                         goto exit_stage_left;
 603                 }
 604         }
 605         SCTP_IPI_ADDR_WUNLOCK();
 606         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 607         if (sctp_ifap == NULL) {
 608 #ifdef INVARIANTS
 609                 panic("No memory for IFA");
 610 #endif
 611                 return (NULL);
 612         }
 613         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 614         sctp_ifap->ifn_p = sctp_ifnp;
 615         atomic_add_int(&sctp_ifnp->refcount, 1);
 616         sctp_ifap->vrf_id = vrf_id;
 617         sctp_ifap->ifa = ifa;
 618         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 619         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 620         sctp_ifap->flags = ifa_flags;
 621         /* Set scope */
 622         switch (sctp_ifap->address.sa.sa_family) {
 623 #ifdef INET
 624         case AF_INET:
 625                 {
 626                         struct sockaddr_in *sin;
 627
 628                         sin = &sctp_ifap->address.sin;
 629                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 630                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 631                                 sctp_ifap->src_is_loop = 1;
 632                         }
 633                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 634                                 sctp_ifap->src_is_priv = 1;
 635                         }
 636                         sctp_ifnp->num_v4++;
 637                         if (new_ifn_af)
 638                                 new_ifn_af = AF_INET;
 639                         break;
 640                 }
 641 #endif
 642 #ifdef INET6
 643         case AF_INET6:
 644                 {
 645                         /* ok to use deprecated addresses? */
 646                         struct sockaddr_in6 *sin6;
 647
 648                         sin6 = &sctp_ifap->address.sin6;
 649                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 650                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 651                                 sctp_ifap->src_is_loop = 1;
 652                         }
 653                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 654                                 sctp_ifap->src_is_priv = 1;
 655                         }
 656                         sctp_ifnp->num_v6++;
 657                         if (new_ifn_af)
 658                                 new_ifn_af = AF_INET6;
 659                         break;
 660                 }
 661 #endif
 662         default:
 663                 new_ifn_af = 0;
 664                 break;
 665         }
 666         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 667
 668         if ((sctp_ifap->src_is_priv == 0) &&
 669             (sctp_ifap->src_is_loop == 0)) {
 670                 sctp_ifap->src_is_glob = 1;
 671         }
 672         SCTP_IPI_ADDR_WLOCK();
 673         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 674         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 675         sctp_ifap->refcount = 1;
 676         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 677         sctp_ifnp->ifa_count++;
 678         vrf->total_ifa_count++;
 679         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 680         if (new_ifn_af) {
 681                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 682                 sctp_ifnp->registered_af = new_ifn_af;
 683         }
 684         SCTP_IPI_ADDR_WUNLOCK();
 685         if (dynamic_add) {
 686                 /*
 687                  * Bump up the refcount so that when the timer completes it
 688                  * will drop back down.
 689                  */
 690                 struct sctp_laddr *wi;
 691
 692                 atomic_add_int(&sctp_ifap->refcount, 1);
 693                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 694                 if (wi == NULL) {
 695                         /*
 696                          * Gak, what can we do? We have lost an address
 697                          * change can you say HOSED?
 698                          */
 699                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 700                         /* Opps, must decrement the count */
 701                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 702                             if_name);
 703                         return (NULL);
 704                 }
 705                 SCTP_INCR_LADDR_COUNT();
 706                 bzero(wi, sizeof(*wi));
 707                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 708                 wi->ifa = sctp_ifap;
 709                 wi->action = SCTP_ADD_IP_ADDRESS;
 710
 711                 SCTP_WQ_ADDR_LOCK();
 712                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 713                 SCTP_WQ_ADDR_UNLOCK();
 714
 715                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 716                     (struct sctp_inpcb *)NULL,
 717                     (struct sctp_tcb *)NULL,
 718                     (struct sctp_nets *)NULL);
 719         } else {
 720                 /* it's ready for use */
 721                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 722         }
 723         return (sctp_ifap);
 724 }
 725
 726 void
 727 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 728     uint32_t ifn_index, const char *if_name)
 729 {
 730         struct sctp_vrf *vrf;
 731         struct sctp_ifa *sctp_ifap = NULL;
 732
 733         SCTP_IPI_ADDR_WLOCK();
 734         vrf = sctp_find_vrf(vrf_id);
 735         if (vrf == NULL) {
 736                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 737                 goto out_now;
 738         }
 739 #ifdef SCTP_DEBUG
 740         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 741         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 742 #endif
 743         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 744         if (sctp_ifap) {
 745                 /* Validate the delete */
 746                 if (sctp_ifap->ifn_p) {
 747                         int valid = 0;
 748
 749                         /*-
 750                          * The name has priority over the ifn_index
 751                          * if its given. We do this especially for
 752                          * panda who might recycle indexes fast.
 753                          */
 754                         if (if_name) {
 755                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 756                                         /* They match its a correct delete */
 757                                         valid = 1;
 758                                 }
 759                         }
 760                         if (!valid) {
 761                                 /* last ditch check ifn_index */
 762                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 763                                         valid = 1;
 764                                 }
 765                         }
 766                         if (!valid) {
 767                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 768                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 769                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 770                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 771                                 SCTP_IPI_ADDR_WUNLOCK();
 772                                 return;
 773                         }
 774                 }
 775                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
 776                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 777                 /*
 778                  * We don't set the flag. This means that the structure will
 779                  * hang around in EP's that have bound specific to it until
 780                  * they close. This gives us TCP like behavior if someone
 781                  * removes an address (or for that matter adds it right
 782                  * back).
 783                  */
 784                 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
 785                 vrf->total_ifa_count--;
 786                 LIST_REMOVE(sctp_ifap, next_bucket);
 787                 sctp_remove_ifa_from_ifn(sctp_ifap);
 788         }
 789 #ifdef SCTP_DEBUG
 790         else {
 791                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 792                     ifn_index);
 793                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 794         }
 795 #endif
 796
 797 out_now:
 798         SCTP_IPI_ADDR_WUNLOCK();
 799         if (sctp_ifap) {
 800                 struct sctp_laddr *wi;
 801
 802                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 803                 if (wi == NULL) {
 804                         /*
 805                          * Gak, what can we do? We have lost an address
 806                          * change can you say HOSED?
 807                          */
 808                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 809
 810                         /* Oops, must decrement the count */
 811                         sctp_free_ifa(sctp_ifap);
 812                         return;
 813                 }
 814                 SCTP_INCR_LADDR_COUNT();
 815                 bzero(wi, sizeof(*wi));
 816                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 817                 wi->ifa = sctp_ifap;
 818                 wi->action = SCTP_DEL_IP_ADDRESS;
 819                 SCTP_WQ_ADDR_LOCK();
 820                 /*
 821                  * Should this really be a tailq? As it is we will process
 822                  * the newest first :-0
 823                  */
 824                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 825                 SCTP_WQ_ADDR_UNLOCK();
 826
 827                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 828                     (struct sctp_inpcb *)NULL,
 829                     (struct sctp_tcb *)NULL,
 830                     (struct sctp_nets *)NULL);
 831         }
 832         return;
 833 }
 834
 835
 836 static int
 837 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
 838 {
 839         int loopback_scope;
 840
 841 #if defined(INET)
 842         int ipv4_local_scope, ipv4_addr_legal;
 843
 844 #endif
 845 #if defined(INET6)
 846         int local_scope, site_scope, ipv6_addr_legal;
 847
 848 #endif
 849         struct sctp_vrf *vrf;
 850         struct sctp_ifn *sctp_ifn;
 851         struct sctp_ifa *sctp_ifa;
 852
 853         loopback_scope = stcb->asoc.scope.loopback_scope;
 854 #if defined(INET)
 855         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
 856         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
 857 #endif
 858 #if defined(INET6)
 859         local_scope = stcb->asoc.scope.local_scope;
 860         site_scope = stcb->asoc.scope.site_scope;
 861         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
 862 #endif
 863
 864         SCTP_IPI_ADDR_RLOCK();
 865         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
 866         if (vrf == NULL) {
 867                 /* no vrf, no addresses */
 868                 SCTP_IPI_ADDR_RUNLOCK();
 869                 return (0);
 870         }
 871         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 872                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 873                         if ((loopback_scope == 0) &&
 874                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 875                                 continue;
 876                         }
 877                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 878                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
 879                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
 880                                         /*
 881                                          * We allow pending addresses, where
 882                                          * we have sent an asconf-add to be
 883                                          * considered valid.
 884                                          */
 885                                         continue;
 886                                 }
 887                                 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
 888                                         continue;
 889                                 }
 890                                 switch (sctp_ifa->address.sa.sa_family) {
 891 #ifdef INET
 892                                 case AF_INET:
 893                                         if (ipv4_addr_legal) {
 894                                                 struct sockaddr_in *sin,
 895                                                            *rsin;
 896
 897                                                 sin = &sctp_ifa->address.sin;
 898                                                 rsin = (struct sockaddr_in *)to;
 899                                                 if ((ipv4_local_scope == 0) &&
 900                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 901                                                         continue;
 902                                                 }
 903                                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
 904                                                     &sin->sin_addr) != 0) {
 905                                                         continue;
 906                                                 }
 907                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 908                                                         SCTP_IPI_ADDR_RUNLOCK();
 909                                                         return (1);
 910                                                 }
 911                                         }
 912                                         break;
 913 #endif
 914 #ifdef INET6
 915                                 case AF_INET6:
 916                                         if (ipv6_addr_legal) {
 917                                                 struct sockaddr_in6 *sin6,
 918                                                             *rsin6;
 919
 920                                                 sin6 = &sctp_ifa->address.sin6;
 921                                                 rsin6 = (struct sockaddr_in6 *)to;
 922                                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
 923                                                     &sin6->sin6_addr) != 0) {
 924                                                         continue;
 925                                                 }
 926                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 927                                                         if (local_scope == 0)
 928                                                                 continue;
 929                                                         if (sin6->sin6_scope_id == 0) {
 930                                                                 if (sa6_recoverscope(sin6) != 0)
 931                                                                         continue;
 932                                                         }
 933                                                 }
 934                                                 if ((site_scope == 0) &&
 935                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
 936                                                         continue;
 937                                                 }
 938                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 939                                                         SCTP_IPI_ADDR_RUNLOCK();
 940                                                         return (1);
 941                                                 }
 942                                         }
 943                                         break;
 944 #endif
 945                                 default:
 946                                         /* TSNH */
 947                                         break;
 948                                 }
 949                         }
 950                 }
 951         } else {
 952                 struct sctp_laddr *laddr;
 953
 954                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
 955                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 956                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 957                                 continue;
 958                         }
 959                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
 960                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
 961                                 /*
 962                                  * We allow pending addresses, where we have
 963                                  * sent an asconf-add to be considered
 964                                  * valid.
 965                                  */
 966                                 continue;
 967                         }
 968                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
 969                                 continue;
 970                         }
 971                         switch (to->sa_family) {
 972 #ifdef INET
 973                         case AF_INET:
 974                                 {
 975                                         struct sockaddr_in *sin, *rsin;
 976
 977                                         sin = &laddr->ifa->address.sin;
 978                                         rsin = (struct sockaddr_in *)to;
 979                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 980                                                 SCTP_IPI_ADDR_RUNLOCK();
 981                                                 return (1);
 982                                         }
 983                                         break;
 984                                 }
 985 #endif
 986 #ifdef INET6
 987                         case AF_INET6:
 988                                 {
 989                                         struct sockaddr_in6 *sin6, *rsin6;
 990
 991                                         sin6 = &laddr->ifa->address.sin6;
 992                                         rsin6 = (struct sockaddr_in6 *)to;
 993                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 994                                                 SCTP_IPI_ADDR_RUNLOCK();
 995                                                 return (1);
 996                                         }
 997                                         break;
 998                                 }
 999
1000 #endif
1001                         default:
1002                                 /* TSNH */
1003                                 break;
1004                         }
1005
1006                 }
1007         }
1008         SCTP_IPI_ADDR_RUNLOCK();
1009         return (0);
1010 }
1011
1012
1013 static struct sctp_tcb *
1014 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1015     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1016 {
1017         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1018         /*
1019          * If we support the TCP model, then we must now dig through to see
1020          * if we can find our endpoint in the list of tcp ep's.
1021          */
1022         uint16_t lport, rport;
1023         struct sctppcbhead *ephead;
1024         struct sctp_inpcb *inp;
1025         struct sctp_laddr *laddr;
1026         struct sctp_tcb *stcb;
1027         struct sctp_nets *net;
1028
1029         if ((to == NULL) || (from == NULL)) {
1030                 return (NULL);
1031         }
1032         switch (to->sa_family) {
1033 #ifdef INET
1034         case AF_INET:
1035                 if (from->sa_family == AF_INET) {
1036                         lport = ((struct sockaddr_in *)to)->sin_port;
1037                         rport = ((struct sockaddr_in *)from)->sin_port;
1038                 } else {
1039                         return (NULL);
1040                 }
1041                 break;
1042 #endif
1043 #ifdef INET6
1044         case AF_INET6:
1045                 if (from->sa_family == AF_INET6) {
1046                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
1047                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
1048                 } else {
1049                         return (NULL);
1050                 }
1051                 break;
1052 #endif
1053         default:
1054                 return (NULL);
1055         }
1056         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1057         /*
1058          * Ok now for each of the guys in this bucket we must look and see:
1059          * - Does the remote port match. - Does there single association's
1060          * addresses match this address (to). If so we update p_ep to point
1061          * to this ep and return the tcb from it.
1062          */
1063         LIST_FOREACH(inp, ephead, sctp_hash) {
1064                 SCTP_INP_RLOCK(inp);
1065                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1066                         SCTP_INP_RUNLOCK(inp);
1067                         continue;
1068                 }
1069                 if (lport != inp->sctp_lport) {
1070                         SCTP_INP_RUNLOCK(inp);
1071                         continue;
1072                 }
1073                 switch (to->sa_family) {
1074 #ifdef INET
1075                 case AF_INET:
1076                         {
1077                                 struct sockaddr_in *sin;
1078
1079                                 sin = (struct sockaddr_in *)to;
1080                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1081                                     &sin->sin_addr) != 0) {
1082                                         SCTP_INP_RUNLOCK(inp);
1083                                         continue;
1084                                 }
1085                                 break;
1086                         }
1087 #endif
1088 #ifdef INET6
1089                 case AF_INET6:
1090                         {
1091                                 struct sockaddr_in6 *sin6;
1092
1093                                 sin6 = (struct sockaddr_in6 *)to;
1094                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1095                                     &sin6->sin6_addr) != 0) {
1096                                         SCTP_INP_RUNLOCK(inp);
1097                                         continue;
1098                                 }
1099                                 break;
1100                         }
1101 #endif
1102                 default:
1103                         SCTP_INP_RUNLOCK(inp);
1104                         continue;
1105                 }
1106                 if (inp->def_vrf_id != vrf_id) {
1107                         SCTP_INP_RUNLOCK(inp);
1108                         continue;
1109                 }
1110                 /* check to see if the ep has one of the addresses */
1111                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1112                         /* We are NOT bound all, so look further */
1113                         int match = 0;
1114
1115                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1116
1117                                 if (laddr->ifa == NULL) {
1118                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
1119                                         continue;
1120                                 }
1121                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1122                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1123                                         continue;
1124                                 }
1125                                 if (laddr->ifa->address.sa.sa_family ==
1126                                     to->sa_family) {
1127                                         /* see if it matches */
1128 #ifdef INET
1129                                         if (from->sa_family == AF_INET) {
1130                                                 struct sockaddr_in *intf_addr,
1131                                                            *sin;
1132
1133                                                 intf_addr = &laddr->ifa->address.sin;
1134                                                 sin = (struct sockaddr_in *)to;
1135                                                 if (sin->sin_addr.s_addr ==
1136                                                     intf_addr->sin_addr.s_addr) {
1137                                                         match = 1;
1138                                                         break;
1139                                                 }
1140                                         }
1141 #endif
1142 #ifdef INET6
1143                                         if (from->sa_family == AF_INET6) {
1144                                                 struct sockaddr_in6 *intf_addr6;
1145                                                 struct sockaddr_in6 *sin6;
1146
1147                                                 sin6 = (struct sockaddr_in6 *)
1148                                                     to;
1149                                                 intf_addr6 = &laddr->ifa->address.sin6;
1150
1151                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1152                                                     intf_addr6)) {
1153                                                         match = 1;
1154                                                         break;
1155                                                 }
1156                                         }
1157 #endif
1158                                 }
1159                         }
1160                         if (match == 0) {
1161                                 /* This endpoint does not have this address */
1162                                 SCTP_INP_RUNLOCK(inp);
1163                                 continue;
1164                         }
1165                 }
1166                 /*
1167                  * Ok if we hit here the ep has the address, does it hold
1168                  * the tcb?
1169                  */
1170                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1171                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1172                 if (stcb == NULL) {
1173                         SCTP_INP_RUNLOCK(inp);
1174                         continue;
1175                 }
1176                 SCTP_TCB_LOCK(stcb);
1177                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1178                         SCTP_TCB_UNLOCK(stcb);
1179                         SCTP_INP_RUNLOCK(inp);
1180                         continue;
1181                 }
1182                 if (stcb->rport != rport) {
1183                         /* remote port does not match. */
1184                         SCTP_TCB_UNLOCK(stcb);
1185                         SCTP_INP_RUNLOCK(inp);
1186                         continue;
1187                 }
1188                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1189                         SCTP_TCB_UNLOCK(stcb);
1190                         SCTP_INP_RUNLOCK(inp);
1191                         continue;
1192                 }
1193                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1194                         SCTP_TCB_UNLOCK(stcb);
1195                         SCTP_INP_RUNLOCK(inp);
1196                         continue;
1197                 }
1198                 /* Does this TCB have a matching address? */
1199                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1200
1201                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1202                                 /* not the same family, can't be a match */
1203                                 continue;
1204                         }
1205                         switch (from->sa_family) {
1206 #ifdef INET
1207                         case AF_INET:
1208                                 {
1209                                         struct sockaddr_in *sin, *rsin;
1210
1211                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
1212                                         rsin = (struct sockaddr_in *)from;
1213                                         if (sin->sin_addr.s_addr ==
1214                                             rsin->sin_addr.s_addr) {
1215                                                 /* found it */
1216                                                 if (netp != NULL) {
1217                                                         *netp = net;
1218                                                 }
1219                                                 /*
1220                                                  * Update the endpoint
1221                                                  * pointer
1222                                                  */
1223                                                 *inp_p = inp;
1224                                                 SCTP_INP_RUNLOCK(inp);
1225                                                 return (stcb);
1226                                         }
1227                                         break;
1228                                 }
1229 #endif
1230 #ifdef INET6
1231                         case AF_INET6:
1232                                 {
1233                                         struct sockaddr_in6 *sin6, *rsin6;
1234
1235                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1236                                         rsin6 = (struct sockaddr_in6 *)from;
1237                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1238                                             rsin6)) {
1239                                                 /* found it */
1240                                                 if (netp != NULL) {
1241                                                         *netp = net;
1242                                                 }
1243                                                 /*
1244                                                  * Update the endpoint
1245                                                  * pointer
1246                                                  */
1247                                                 *inp_p = inp;
1248                                                 SCTP_INP_RUNLOCK(inp);
1249                                                 return (stcb);
1250                                         }
1251                                         break;
1252                                 }
1253 #endif
1254                         default:
1255                                 /* TSNH */
1256                                 break;
1257                         }
1258                 }
1259                 SCTP_TCB_UNLOCK(stcb);
1260                 SCTP_INP_RUNLOCK(inp);
1261         }
1262         return (NULL);
1263 }
1264
1265
1266 /*
1267  * rules for use
1268  *
1269  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1270  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1271  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1272  * NULL.
1273  */
1274
1275 struct sctp_tcb *
1276 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1277     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1278 {
1279         struct sctpasochead *head;
1280         struct sctp_inpcb *inp;
1281         struct sctp_tcb *stcb = NULL;
1282         struct sctp_nets *net;
1283         uint16_t rport;
1284
1285         inp = *inp_p;
1286         switch (remote->sa_family) {
1287 #ifdef INET
1288         case AF_INET:
1289                 rport = (((struct sockaddr_in *)remote)->sin_port);
1290                 break;
1291 #endif
1292 #ifdef INET6
1293         case AF_INET6:
1294                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1295                 break;
1296 #endif
1297         default:
1298                 return (NULL);
1299         }
1300         if (locked_tcb) {
1301                 /*
1302                  * UN-lock so we can do proper locking here this occurs when
1303                  * called from load_addresses_from_init.
1304                  */
1305                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1306                 SCTP_TCB_UNLOCK(locked_tcb);
1307         }
1308         SCTP_INP_INFO_RLOCK();
1309         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1310             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1311                 /*-
1312                  * Now either this guy is our listener or it's the
1313                  * connector. If it is the one that issued the connect, then
1314                  * it's only chance is to be the first TCB in the list. If
1315                  * it is the acceptor, then do the special_lookup to hash
1316                  * and find the real inp.
1317                  */
1318                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1319                         /* to is peer addr, from is my addr */
1320                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1321                             netp, inp->def_vrf_id);
1322                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1323                                 /* we have a locked tcb, lower refcount */
1324                                 SCTP_INP_DECR_REF(inp);
1325                         }
1326                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1327                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1328                                 SCTP_TCB_LOCK(locked_tcb);
1329                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1330                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1331                         }
1332                         SCTP_INP_INFO_RUNLOCK();
1333                         return (stcb);
1334                 } else {
1335                         SCTP_INP_WLOCK(inp);
1336                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1337                                 goto null_return;
1338                         }
1339                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1340                         if (stcb == NULL) {
1341                                 goto null_return;
1342                         }
1343                         SCTP_TCB_LOCK(stcb);
1344
1345                         if (stcb->rport != rport) {
1346                                 /* remote port does not match. */
1347                                 SCTP_TCB_UNLOCK(stcb);
1348                                 goto null_return;
1349                         }
1350                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1351                                 SCTP_TCB_UNLOCK(stcb);
1352                                 goto null_return;
1353                         }
1354                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1355                                 SCTP_TCB_UNLOCK(stcb);
1356                                 goto null_return;
1357                         }
1358                         /* now look at the list of remote addresses */
1359                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1360 #ifdef INVARIANTS
1361                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1362                                         panic("Corrupt net list");
1363                                 }
1364 #endif
1365                                 if (net->ro._l_addr.sa.sa_family !=
1366                                     remote->sa_family) {
1367                                         /* not the same family */
1368                                         continue;
1369                                 }
1370                                 switch (remote->sa_family) {
1371 #ifdef INET
1372                                 case AF_INET:
1373                                         {
1374                                                 struct sockaddr_in *sin,
1375                                                            *rsin;
1376
1377                                                 sin = (struct sockaddr_in *)
1378                                                     &net->ro._l_addr;
1379                                                 rsin = (struct sockaddr_in *)remote;
1380                                                 if (sin->sin_addr.s_addr ==
1381                                                     rsin->sin_addr.s_addr) {
1382                                                         /* found it */
1383                                                         if (netp != NULL) {
1384                                                                 *netp = net;
1385                                                         }
1386                                                         if (locked_tcb == NULL) {
1387                                                                 SCTP_INP_DECR_REF(inp);
1388                                                         } else if (locked_tcb != stcb) {
1389                                                                 SCTP_TCB_LOCK(locked_tcb);
1390                                                         }
1391                                                         if (locked_tcb) {
1392                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1393                                                         }
1394                                                         SCTP_INP_WUNLOCK(inp);
1395                                                         SCTP_INP_INFO_RUNLOCK();
1396                                                         return (stcb);
1397                                                 }
1398                                                 break;
1399                                         }
1400 #endif
1401 #ifdef INET6
1402                                 case AF_INET6:
1403                                         {
1404                                                 struct sockaddr_in6 *sin6,
1405                                                             *rsin6;
1406
1407                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1408                                                 rsin6 = (struct sockaddr_in6 *)remote;
1409                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1410                                                     rsin6)) {
1411                                                         /* found it */
1412                                                         if (netp != NULL) {
1413                                                                 *netp = net;
1414                                                         }
1415                                                         if (locked_tcb == NULL) {
1416                                                                 SCTP_INP_DECR_REF(inp);
1417                                                         } else if (locked_tcb != stcb) {
1418                                                                 SCTP_TCB_LOCK(locked_tcb);
1419                                                         }
1420                                                         if (locked_tcb) {
1421                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1422                                                         }
1423                                                         SCTP_INP_WUNLOCK(inp);
1424                                                         SCTP_INP_INFO_RUNLOCK();
1425                                                         return (stcb);
1426                                                 }
1427                                                 break;
1428                                         }
1429 #endif
1430                                 default:
1431                                         /* TSNH */
1432                                         break;
1433                                 }
1434                         }
1435                         SCTP_TCB_UNLOCK(stcb);
1436                 }
1437         } else {
1438                 SCTP_INP_WLOCK(inp);
1439                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1440                         goto null_return;
1441                 }
1442                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1443                     inp->sctp_hashmark)];
1444                 if (head == NULL) {
1445                         goto null_return;
1446                 }
1447                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1448                         if (stcb->rport != rport) {
1449                                 /* remote port does not match */
1450                                 continue;
1451                         }
1452                         SCTP_TCB_LOCK(stcb);
1453                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1454                                 SCTP_TCB_UNLOCK(stcb);
1455                                 continue;
1456                         }
1457                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1458                                 SCTP_TCB_UNLOCK(stcb);
1459                                 continue;
1460                         }
1461                         /* now look at the list of remote addresses */
1462                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1463 #ifdef INVARIANTS
1464                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1465                                         panic("Corrupt net list");
1466                                 }
1467 #endif
1468                                 if (net->ro._l_addr.sa.sa_family !=
1469                                     remote->sa_family) {
1470                                         /* not the same family */
1471                                         continue;
1472                                 }
1473                                 switch (remote->sa_family) {
1474 #ifdef INET
1475                                 case AF_INET:
1476                                         {
1477                                                 struct sockaddr_in *sin,
1478                                                            *rsin;
1479
1480                                                 sin = (struct sockaddr_in *)
1481                                                     &net->ro._l_addr;
1482                                                 rsin = (struct sockaddr_in *)remote;
1483                                                 if (sin->sin_addr.s_addr ==
1484                                                     rsin->sin_addr.s_addr) {
1485                                                         /* found it */
1486                                                         if (netp != NULL) {
1487                                                                 *netp = net;
1488                                                         }
1489                                                         if (locked_tcb == NULL) {
1490                                                                 SCTP_INP_DECR_REF(inp);
1491                                                         } else if (locked_tcb != stcb) {
1492                                                                 SCTP_TCB_LOCK(locked_tcb);
1493                                                         }
1494                                                         if (locked_tcb) {
1495                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1496                                                         }
1497                                                         SCTP_INP_WUNLOCK(inp);
1498                                                         SCTP_INP_INFO_RUNLOCK();
1499                                                         return (stcb);
1500                                                 }
1501                                                 break;
1502                                         }
1503 #endif
1504 #ifdef INET6
1505                                 case AF_INET6:
1506                                         {
1507                                                 struct sockaddr_in6 *sin6,
1508                                                             *rsin6;
1509
1510                                                 sin6 = (struct sockaddr_in6 *)
1511                                                     &net->ro._l_addr;
1512                                                 rsin6 = (struct sockaddr_in6 *)remote;
1513                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1514                                                     rsin6)) {
1515                                                         /* found it */
1516                                                         if (netp != NULL) {
1517                                                                 *netp = net;
1518                                                         }
1519                                                         if (locked_tcb == NULL) {
1520                                                                 SCTP_INP_DECR_REF(inp);
1521                                                         } else if (locked_tcb != stcb) {
1522                                                                 SCTP_TCB_LOCK(locked_tcb);
1523                                                         }
1524                                                         if (locked_tcb) {
1525                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1526                                                         }
1527                                                         SCTP_INP_WUNLOCK(inp);
1528                                                         SCTP_INP_INFO_RUNLOCK();
1529                                                         return (stcb);
1530                                                 }
1531                                                 break;
1532                                         }
1533 #endif
1534                                 default:
1535                                         /* TSNH */
1536                                         break;
1537                                 }
1538                         }
1539                         SCTP_TCB_UNLOCK(stcb);
1540                 }
1541         }
1542 null_return:
1543         /* clean up for returning null */
1544         if (locked_tcb) {
1545                 SCTP_TCB_LOCK(locked_tcb);
1546                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1547         }
1548         SCTP_INP_WUNLOCK(inp);
1549         SCTP_INP_INFO_RUNLOCK();
1550         /* not found */
1551         return (NULL);
1552 }
1553
1554
1555 /*
1556  * Find an association for a specific endpoint using the association id given
1557  * out in the COMM_UP notification
1558  */
1559 struct sctp_tcb *
1560 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1561 {
1562         /*
1563          * Use my the assoc_id to find a endpoint
1564          */
1565         struct sctpasochead *head;
1566         struct sctp_tcb *stcb;
1567         uint32_t id;
1568
1569         if (inp == NULL) {
1570                 SCTP_PRINTF("TSNH ep_associd\n");
1571                 return (NULL);
1572         }
1573         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1574                 SCTP_PRINTF("TSNH ep_associd0\n");
1575                 return (NULL);
1576         }
1577         id = (uint32_t) asoc_id;
1578         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1579         if (head == NULL) {
1580                 /* invalid id TSNH */
1581                 SCTP_PRINTF("TSNH ep_associd1\n");
1582                 return (NULL);
1583         }
1584         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1585                 if (stcb->asoc.assoc_id == id) {
1586                         if (inp != stcb->sctp_ep) {
1587                                 /*
1588                                  * some other guy has the same id active (id
1589                                  * collision ??).
1590                                  */
1591                                 SCTP_PRINTF("TSNH ep_associd2\n");
1592                                 continue;
1593                         }
1594                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1595                                 continue;
1596                         }
1597                         if (want_lock) {
1598                                 SCTP_TCB_LOCK(stcb);
1599                         }
1600                         return (stcb);
1601                 }
1602         }
1603         return (NULL);
1604 }
1605
1606
1607 struct sctp_tcb *
1608 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1609 {
1610         struct sctp_tcb *stcb;
1611
1612         SCTP_INP_RLOCK(inp);
1613         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1614         SCTP_INP_RUNLOCK(inp);
1615         return (stcb);
1616 }
1617
1618
1619 /*
1620  * Endpoint probe expects that the INP_INFO is locked.
1621  */
1622 static struct sctp_inpcb *
1623 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1624     uint16_t lport, uint32_t vrf_id)
1625 {
1626         struct sctp_inpcb *inp;
1627         struct sctp_laddr *laddr;
1628
1629 #ifdef INET
1630         struct sockaddr_in *sin;
1631
1632 #endif
1633 #ifdef INET6
1634         struct sockaddr_in6 *sin6;
1635         struct sockaddr_in6 *intf_addr6;
1636
1637 #endif
1638         int fnd;
1639
1640 #ifdef INET
1641         sin = NULL;
1642 #endif
1643 #ifdef INET6
1644         sin6 = NULL;
1645 #endif
1646         switch (nam->sa_family) {
1647 #ifdef INET
1648         case AF_INET:
1649                 sin = (struct sockaddr_in *)nam;
1650                 break;
1651 #endif
1652 #ifdef INET6
1653         case AF_INET6:
1654                 sin6 = (struct sockaddr_in6 *)nam;
1655                 break;
1656 #endif
1657         default:
1658                 /* unsupported family */
1659                 return (NULL);
1660         }
1661
1662         if (head == NULL)
1663                 return (NULL);
1664
1665         LIST_FOREACH(inp, head, sctp_hash) {
1666                 SCTP_INP_RLOCK(inp);
1667                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1668                         SCTP_INP_RUNLOCK(inp);
1669                         continue;
1670                 }
1671                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1672                     (inp->sctp_lport == lport)) {
1673                         /* got it */
1674                         switch (nam->sa_family) {
1675 #ifdef INET
1676                         case AF_INET:
1677                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1678                                     SCTP_IPV6_V6ONLY(inp)) {
1679                                         /*
1680                                          * IPv4 on a IPv6 socket with ONLY
1681                                          * IPv6 set
1682                                          */
1683                                         SCTP_INP_RUNLOCK(inp);
1684                                         continue;
1685                                 }
1686                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1687                                     &sin->sin_addr) != 0) {
1688                                         SCTP_INP_RUNLOCK(inp);
1689                                         continue;
1690                                 }
1691                                 break;
1692 #endif
1693 #ifdef INET6
1694                         case AF_INET6:
1695                                 /*
1696                                  * A V6 address and the endpoint is NOT
1697                                  * bound V6
1698                                  */
1699                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1700                                         SCTP_INP_RUNLOCK(inp);
1701                                         continue;
1702                                 }
1703                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1704                                     &sin6->sin6_addr) != 0) {
1705                                         SCTP_INP_RUNLOCK(inp);
1706                                         continue;
1707                                 }
1708                                 break;
1709 #endif
1710                         default:
1711                                 break;
1712                         }
1713                         /* does a VRF id match? */
1714                         fnd = 0;
1715                         if (inp->def_vrf_id == vrf_id)
1716                                 fnd = 1;
1717
1718                         SCTP_INP_RUNLOCK(inp);
1719                         if (!fnd)
1720                                 continue;
1721                         return (inp);
1722                 }
1723                 SCTP_INP_RUNLOCK(inp);
1724         }
1725         switch (nam->sa_family) {
1726 #ifdef INET
1727         case AF_INET:
1728                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1729                         /* Can't hunt for one that has no address specified */
1730                         return (NULL);
1731                 }
1732                 break;
1733 #endif
1734 #ifdef INET6
1735         case AF_INET6:
1736                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1737                         /* Can't hunt for one that has no address specified */
1738                         return (NULL);
1739                 }
1740                 break;
1741 #endif
1742         default:
1743                 break;
1744         }
1745         /*
1746          * ok, not bound to all so see if we can find a EP bound to this
1747          * address.
1748          */
1749         LIST_FOREACH(inp, head, sctp_hash) {
1750                 SCTP_INP_RLOCK(inp);
1751                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1752                         SCTP_INP_RUNLOCK(inp);
1753                         continue;
1754                 }
1755                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1756                         SCTP_INP_RUNLOCK(inp);
1757                         continue;
1758                 }
1759                 /*
1760                  * Ok this could be a likely candidate, look at all of its
1761                  * addresses
1762                  */
1763                 if (inp->sctp_lport != lport) {
1764                         SCTP_INP_RUNLOCK(inp);
1765                         continue;
1766                 }
1767                 /* does a VRF id match? */
1768                 fnd = 0;
1769                 if (inp->def_vrf_id == vrf_id)
1770                         fnd = 1;
1771
1772                 if (!fnd) {
1773                         SCTP_INP_RUNLOCK(inp);
1774                         continue;
1775                 }
1776                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1777                         if (laddr->ifa == NULL) {
1778                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1779                                     __FUNCTION__);
1780                                 continue;
1781                         }
1782                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1783                             (void *)laddr->ifa);
1784                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1785                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1786                                 continue;
1787                         }
1788                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1789                                 /* possible, see if it matches */
1790                                 switch (nam->sa_family) {
1791 #ifdef INET
1792                                 case AF_INET:
1793                                         if (sin->sin_addr.s_addr ==
1794                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1795                                                 SCTP_INP_RUNLOCK(inp);
1796                                                 return (inp);
1797                                         }
1798                                         break;
1799 #endif
1800 #ifdef INET6
1801                                 case AF_INET6:
1802                                         intf_addr6 = &laddr->ifa->address.sin6;
1803                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1804                                             intf_addr6)) {
1805                                                 SCTP_INP_RUNLOCK(inp);
1806                                                 return (inp);
1807                                         }
1808                                         break;
1809 #endif
1810                                 }
1811                         }
1812                 }
1813                 SCTP_INP_RUNLOCK(inp);
1814         }
1815         return (NULL);
1816 }
1817
1818
1819 static struct sctp_inpcb *
1820 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1821 {
1822         struct sctppcbhead *head;
1823         struct sctp_inpcb *t_inp;
1824         int fnd;
1825
1826         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1827             SCTP_BASE_INFO(hashmark))];
1828         LIST_FOREACH(t_inp, head, sctp_hash) {
1829                 if (t_inp->sctp_lport != lport) {
1830                         continue;
1831                 }
1832                 /* is it in the VRF in question */
1833                 fnd = 0;
1834                 if (t_inp->def_vrf_id == vrf_id)
1835                         fnd = 1;
1836                 if (!fnd)
1837                         continue;
1838
1839                 /* This one is in use. */
1840                 /* check the v6/v4 binding issue */
1841                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1842                     SCTP_IPV6_V6ONLY(t_inp)) {
1843                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1844                                 /* collision in V6 space */
1845                                 return (t_inp);
1846                         } else {
1847                                 /* inp is BOUND_V4 no conflict */
1848                                 continue;
1849                         }
1850                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1851                         /* t_inp is bound v4 and v6, conflict always */
1852                         return (t_inp);
1853                 } else {
1854                         /* t_inp is bound only V4 */
1855                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1856                             SCTP_IPV6_V6ONLY(inp)) {
1857                                 /* no conflict */
1858                                 continue;
1859                         }
1860                         /* else fall through to conflict */
1861                 }
1862                 return (t_inp);
1863         }
1864         return (NULL);
1865 }
1866
1867
1868 int
1869 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1870 {
1871         /* For 1-2-1 with port reuse */
1872         struct sctppcbhead *head;
1873         struct sctp_inpcb *tinp;
1874
1875         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1876                 /* only works with port reuse on */
1877                 return (-1);
1878         }
1879         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1880                 return (0);
1881         }
1882         SCTP_INP_RUNLOCK(inp);
1883         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1884             SCTP_BASE_INFO(hashmark))];
1885         /* Kick out all non-listeners to the TCP hash */
1886         LIST_FOREACH(tinp, head, sctp_hash) {
1887                 if (tinp->sctp_lport != inp->sctp_lport) {
1888                         continue;
1889                 }
1890                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1891                         continue;
1892                 }
1893                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1894                         continue;
1895                 }
1896                 if (tinp->sctp_socket->so_qlimit) {
1897                         continue;
1898                 }
1899                 SCTP_INP_WLOCK(tinp);
1900                 LIST_REMOVE(tinp, sctp_hash);
1901                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1902                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1903                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1904                 SCTP_INP_WUNLOCK(tinp);
1905         }
1906         SCTP_INP_WLOCK(inp);
1907         /* Pull from where he was */
1908         LIST_REMOVE(inp, sctp_hash);
1909         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1910         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1911         LIST_INSERT_HEAD(head, inp, sctp_hash);
1912         SCTP_INP_WUNLOCK(inp);
1913         SCTP_INP_RLOCK(inp);
1914         return (0);
1915 }
1916
1917
1918 struct sctp_inpcb *
1919 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1920     uint32_t vrf_id)
1921 {
1922         /*
1923          * First we check the hash table to see if someone has this port
1924          * bound with just the port.
1925          */
1926         struct sctp_inpcb *inp;
1927         struct sctppcbhead *head;
1928         int lport;
1929         unsigned int i;
1930
1931 #ifdef INET
1932         struct sockaddr_in *sin;
1933
1934 #endif
1935 #ifdef INET6
1936         struct sockaddr_in6 *sin6;
1937
1938 #endif
1939
1940         switch (nam->sa_family) {
1941 #ifdef INET
1942         case AF_INET:
1943                 sin = (struct sockaddr_in *)nam;
1944                 lport = sin->sin_port;
1945                 break;
1946 #endif
1947 #ifdef INET6
1948         case AF_INET6:
1949                 sin6 = (struct sockaddr_in6 *)nam;
1950                 lport = sin6->sin6_port;
1951                 break;
1952 #endif
1953         default:
1954                 return (NULL);
1955         }
1956         /*
1957          * I could cheat here and just cast to one of the types but we will
1958          * do it right. It also provides the check against an Unsupported
1959          * type too.
1960          */
1961         /* Find the head of the ALLADDR chain */
1962         if (have_lock == 0) {
1963                 SCTP_INP_INFO_RLOCK();
1964         }
1965         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1966             SCTP_BASE_INFO(hashmark))];
1967         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1968
1969         /*
1970          * If the TCP model exists it could be that the main listening
1971          * endpoint is gone but there still exists a connected socket for
1972          * this guy. If so we can return the first one that we find. This
1973          * may NOT be the correct one so the caller should be wary on the
1974          * returned INP. Currently the only caller that sets find_tcp_pool
1975          * is in bindx where we are verifying that a user CAN bind the
1976          * address. He either has bound it already, or someone else has, or
1977          * its open to bind, so this is good enough.
1978          */
1979         if (inp == NULL && find_tcp_pool) {
1980                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1981                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1982                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1983                         if (inp) {
1984                                 break;
1985                         }
1986                 }
1987         }
1988         if (inp) {
1989                 SCTP_INP_INCR_REF(inp);
1990         }
1991         if (have_lock == 0) {
1992                 SCTP_INP_INFO_RUNLOCK();
1993         }
1994         return (inp);
1995 }
1996
1997
1998 /*
1999  * Find an association for an endpoint with the pointer to whom you want to
2000  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
2001  * need to change the *to to some other struct like a mbuf...
2002  */
2003 struct sctp_tcb *
2004 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
2005     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
2006     uint32_t vrf_id)
2007 {
2008         struct sctp_inpcb *inp = NULL;
2009         struct sctp_tcb *stcb;
2010
2011         SCTP_INP_INFO_RLOCK();
2012         if (find_tcp_pool) {
2013                 if (inp_p != NULL) {
2014                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2015                             vrf_id);
2016                 } else {
2017                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2018                             vrf_id);
2019                 }
2020                 if (stcb != NULL) {
2021                         SCTP_INP_INFO_RUNLOCK();
2022                         return (stcb);
2023                 }
2024         }
2025         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2026         if (inp_p != NULL) {
2027                 *inp_p = inp;
2028         }
2029         SCTP_INP_INFO_RUNLOCK();
2030         if (inp == NULL) {
2031                 return (NULL);
2032         }
2033         /*
2034          * ok, we have an endpoint, now lets find the assoc for it (if any)
2035          * we now place the source address or from in the to of the find
2036          * endpoint call. Since in reality this chain is used from the
2037          * inbound packet side.
2038          */
2039         if (inp_p != NULL) {
2040                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2041                     NULL);
2042         } else {
2043                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2044                     NULL);
2045         }
2046         return (stcb);
2047 }
2048
2049
2050 /*
2051  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2052  * find all addresses that the sender has specified in any address list. Each
2053  * address will be used to lookup the TCB and see if one exits.
2054  */
2055 static struct sctp_tcb *
2056 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2057     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2058     struct sockaddr *dst)
2059 {
2060         struct sctp_paramhdr *phdr, parm_buf;
2061
2062 #if defined(INET) || defined(INET6)
2063         struct sctp_tcb *stcb;
2064         uint16_t ptype;
2065
2066 #endif
2067         uint16_t plen;
2068
2069 #ifdef INET
2070         struct sockaddr_in sin4;
2071
2072 #endif
2073 #ifdef INET6
2074         struct sockaddr_in6 sin6;
2075
2076 #endif
2077
2078 #ifdef INET
2079         memset(&sin4, 0, sizeof(sin4));
2080         sin4.sin_len = sizeof(sin4);
2081         sin4.sin_family = AF_INET;
2082         sin4.sin_port = sh->src_port;
2083 #endif
2084 #ifdef INET6
2085         memset(&sin6, 0, sizeof(sin6));
2086         sin6.sin6_len = sizeof(sin6);
2087         sin6.sin6_family = AF_INET6;
2088         sin6.sin6_port = sh->src_port;
2089 #endif
2090
2091         offset += sizeof(struct sctp_init_chunk);
2092
2093         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
2094         while (phdr != NULL) {
2095                 /* now we must see if we want the parameter */
2096 #if defined(INET) || defined(INET6)
2097                 ptype = ntohs(phdr->param_type);
2098 #endif
2099                 plen = ntohs(phdr->param_length);
2100                 if (plen == 0) {
2101                         break;
2102                 }
2103 #ifdef INET
2104                 if (ptype == SCTP_IPV4_ADDRESS &&
2105                     plen == sizeof(struct sctp_ipv4addr_param)) {
2106                         /* Get the rest of the address */
2107                         struct sctp_ipv4addr_param ip4_parm, *p4;
2108
2109                         phdr = sctp_get_next_param(m, offset,
2110                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2111                         if (phdr == NULL) {
2112                                 return (NULL);
2113                         }
2114                         p4 = (struct sctp_ipv4addr_param *)phdr;
2115                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2116                         /* look it up */
2117                         stcb = sctp_findassociation_ep_addr(inp_p,
2118                             (struct sockaddr *)&sin4, netp, dst, NULL);
2119                         if (stcb != NULL) {
2120                                 return (stcb);
2121                         }
2122                 }
2123 #endif
2124 #ifdef INET6
2125                 if (ptype == SCTP_IPV6_ADDRESS &&
2126                     plen == sizeof(struct sctp_ipv6addr_param)) {
2127                         /* Get the rest of the address */
2128                         struct sctp_ipv6addr_param ip6_parm, *p6;
2129
2130                         phdr = sctp_get_next_param(m, offset,
2131                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
2132                         if (phdr == NULL) {
2133                                 return (NULL);
2134                         }
2135                         p6 = (struct sctp_ipv6addr_param *)phdr;
2136                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2137                         /* look it up */
2138                         stcb = sctp_findassociation_ep_addr(inp_p,
2139                             (struct sockaddr *)&sin6, netp, dst, NULL);
2140                         if (stcb != NULL) {
2141                                 return (stcb);
2142                         }
2143                 }
2144 #endif
2145                 offset += SCTP_SIZE32(plen);
2146                 phdr = sctp_get_next_param(m, offset, &parm_buf,
2147                     sizeof(parm_buf));
2148         }
2149         return (NULL);
2150 }
2151
2152 static struct sctp_tcb *
2153 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2154     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2155     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2156 {
2157         /*
2158          * Use my vtag to hash. If we find it we then verify the source addr
2159          * is in the assoc. If all goes well we save a bit on rec of a
2160          * packet.
2161          */
2162         struct sctpasochead *head;
2163         struct sctp_nets *net;
2164         struct sctp_tcb *stcb;
2165
2166         SCTP_INP_INFO_RLOCK();
2167         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2168             SCTP_BASE_INFO(hashasocmark))];
2169         if (head == NULL) {
2170                 /* invalid vtag */
2171                 SCTP_INP_INFO_RUNLOCK();
2172                 return (NULL);
2173         }
2174         LIST_FOREACH(stcb, head, sctp_asocs) {
2175                 SCTP_INP_RLOCK(stcb->sctp_ep);
2176                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2177                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2178                         continue;
2179                 }
2180                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2181                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2182                         continue;
2183                 }
2184                 SCTP_TCB_LOCK(stcb);
2185                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2186                 if (stcb->asoc.my_vtag == vtag) {
2187                         /* candidate */
2188                         if (stcb->rport != rport) {
2189                                 SCTP_TCB_UNLOCK(stcb);
2190                                 continue;
2191                         }
2192                         if (stcb->sctp_ep->sctp_lport != lport) {
2193                                 SCTP_TCB_UNLOCK(stcb);
2194                                 continue;
2195                         }
2196                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2197                                 SCTP_TCB_UNLOCK(stcb);
2198                                 continue;
2199                         }
2200                         /* RRS:Need toaddr check here */
2201                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2202                                 /* Endpoint does not own this address */
2203                                 SCTP_TCB_UNLOCK(stcb);
2204                                 continue;
2205                         }
2206                         if (remote_tag) {
2207                                 /*
2208                                  * If we have both vtags that's all we match
2209                                  * on
2210                                  */
2211                                 if (stcb->asoc.peer_vtag == remote_tag) {
2212                                         /*
2213                                          * If both tags match we consider it
2214                                          * conclusive and check NO
2215                                          * source/destination addresses
2216                                          */
2217                                         goto conclusive;
2218                                 }
2219                         }
2220                         if (skip_src_check) {
2221                 conclusive:
2222                                 if (from) {
2223                                         *netp = sctp_findnet(stcb, from);
2224                                 } else {
2225                                         *netp = NULL;   /* unknown */
2226                                 }
2227                                 if (inp_p)
2228                                         *inp_p = stcb->sctp_ep;
2229                                 SCTP_INP_INFO_RUNLOCK();
2230                                 return (stcb);
2231                         }
2232                         net = sctp_findnet(stcb, from);
2233                         if (net) {
2234                                 /* yep its him. */
2235                                 *netp = net;
2236                                 SCTP_STAT_INCR(sctps_vtagexpress);
2237                                 *inp_p = stcb->sctp_ep;
2238                                 SCTP_INP_INFO_RUNLOCK();
2239                                 return (stcb);
2240                         } else {
2241                                 /*
2242                                  * not him, this should only happen in rare
2243                                  * cases so I peg it.
2244                                  */
2245                                 SCTP_STAT_INCR(sctps_vtagbogus);
2246                         }
2247                 }
2248                 SCTP_TCB_UNLOCK(stcb);
2249         }
2250         SCTP_INP_INFO_RUNLOCK();
2251         return (NULL);
2252 }
2253
2254
2255 /*
2256  * Find an association with the pointer to the inbound IP packet. This can be
2257  * a IPv4 or IPv6 packet.
2258  */
2259 struct sctp_tcb *
2260 sctp_findassociation_addr(struct mbuf *m, int offset,
2261     struct sockaddr *src, struct sockaddr *dst,
2262     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2263     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2264 {
2265         int find_tcp_pool;
2266         struct sctp_tcb *stcb;
2267         struct sctp_inpcb *inp;
2268
2269         if (sh->v_tag) {
2270                 /* we only go down this path if vtag is non-zero */
2271                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2272                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2273                 if (stcb) {
2274                         return (stcb);
2275                 }
2276         }
2277         find_tcp_pool = 0;
2278         if ((ch->chunk_type != SCTP_INITIATION) &&
2279             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2280             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2281             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2282                 /* Other chunk types go to the tcp pool. */
2283                 find_tcp_pool = 1;
2284         }
2285         if (inp_p) {
2286                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2287                     find_tcp_pool, vrf_id);
2288                 inp = *inp_p;
2289         } else {
2290                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2291                     find_tcp_pool, vrf_id);
2292         }
2293         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2294         if (stcb == NULL && inp) {
2295                 /* Found a EP but not this address */
2296                 if ((ch->chunk_type == SCTP_INITIATION) ||
2297                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2298                         /*-
2299                          * special hook, we do NOT return linp or an
2300                          * association that is linked to an existing
2301                          * association that is under the TCP pool (i.e. no
2302                          * listener exists). The endpoint finding routine
2303                          * will always find a listener before examining the
2304                          * TCP pool.
2305                          */
2306                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2307                                 if (inp_p) {
2308                                         *inp_p = NULL;
2309                                 }
2310                                 return (NULL);
2311                         }
2312                         stcb = sctp_findassociation_special_addr(m,
2313                             offset, sh, &inp, netp, dst);
2314                         if (inp_p != NULL) {
2315                                 *inp_p = inp;
2316                         }
2317                 }
2318         }
2319         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2320         return (stcb);
2321 }
2322
2323 /*
2324  * lookup an association by an ASCONF lookup address.
2325  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2326  */
2327 struct sctp_tcb *
2328 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2329     struct sockaddr *dst, struct sctphdr *sh,
2330     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2331 {
2332         struct sctp_tcb *stcb;
2333         union sctp_sockstore remote_store;
2334         struct sctp_paramhdr parm_buf, *phdr;
2335         int ptype;
2336         int zero_address = 0;
2337
2338 #ifdef INET
2339         struct sockaddr_in *sin;
2340
2341 #endif
2342 #ifdef INET6
2343         struct sockaddr_in6 *sin6;
2344
2345 #endif
2346
2347         memset(&remote_store, 0, sizeof(remote_store));
2348         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2349             &parm_buf, sizeof(struct sctp_paramhdr));
2350         if (phdr == NULL) {
2351                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2352                     __FUNCTION__);
2353                 return NULL;
2354         }
2355         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2356         /* get the correlation address */
2357         switch (ptype) {
2358 #ifdef INET6
2359         case SCTP_IPV6_ADDRESS:
2360                 {
2361                         /* ipv6 address param */
2362                         struct sctp_ipv6addr_param *p6, p6_buf;
2363
2364                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2365                                 return NULL;
2366                         }
2367                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2368                             offset + sizeof(struct sctp_asconf_chunk),
2369                             &p6_buf.ph, sizeof(*p6));
2370                         if (p6 == NULL) {
2371                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2372                                     __FUNCTION__);
2373                                 return (NULL);
2374                         }
2375                         sin6 = &remote_store.sin6;
2376                         sin6->sin6_family = AF_INET6;
2377                         sin6->sin6_len = sizeof(*sin6);
2378                         sin6->sin6_port = sh->src_port;
2379                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2380                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2381                                 zero_address = 1;
2382                         break;
2383                 }
2384 #endif
2385 #ifdef INET
2386         case SCTP_IPV4_ADDRESS:
2387                 {
2388                         /* ipv4 address param */
2389                         struct sctp_ipv4addr_param *p4, p4_buf;
2390
2391                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2392                                 return NULL;
2393                         }
2394                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2395                             offset + sizeof(struct sctp_asconf_chunk),
2396                             &p4_buf.ph, sizeof(*p4));
2397                         if (p4 == NULL) {
2398                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2399                                     __FUNCTION__);
2400                                 return (NULL);
2401                         }
2402                         sin = &remote_store.sin;
2403                         sin->sin_family = AF_INET;
2404                         sin->sin_len = sizeof(*sin);
2405                         sin->sin_port = sh->src_port;
2406                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2407                         if (sin->sin_addr.s_addr == INADDR_ANY)
2408                                 zero_address = 1;
2409                         break;
2410                 }
2411 #endif
2412         default:
2413                 /* invalid address param type */
2414                 return NULL;
2415         }
2416
2417         if (zero_address) {
2418                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2419                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2420                 if (stcb != NULL) {
2421                         SCTP_INP_DECR_REF(*inp_p);
2422                 }
2423         } else {
2424                 stcb = sctp_findassociation_ep_addr(inp_p,
2425                     &remote_store.sa, netp,
2426                     dst, NULL);
2427         }
2428         return (stcb);
2429 }
2430
2431
2432 /*
2433  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2434  * addresses. This way if we don't get a bind we by default pick a ephemeral
2435  * port with all addresses bound.
2436  */
2437 int
2438 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2439 {
2440         /*
2441          * we get called when a new endpoint starts up. We need to allocate
2442          * the sctp_inpcb structure from the zone and init it. Mark it as
2443          * unbound and find a port that we can use as an ephemeral with
2444          * INADDR_ANY. If the user binds later no problem we can then add in
2445          * the specific addresses. And setup the default parameters for the
2446          * EP.
2447          */
2448         int i, error;
2449         struct sctp_inpcb *inp;
2450         struct sctp_pcb *m;
2451         struct timeval time;
2452         sctp_sharedkey_t *null_key;
2453
2454         error = 0;
2455
2456         SCTP_INP_INFO_WLOCK();
2457         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2458         if (inp == NULL) {
2459                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2460                 SCTP_INP_INFO_WUNLOCK();
2461                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2462                 return (ENOBUFS);
2463         }
2464         /* zap it */
2465         bzero(inp, sizeof(*inp));
2466
2467         /* bump generations */
2468         /* setup socket pointers */
2469         inp->sctp_socket = so;
2470         inp->ip_inp.inp.inp_socket = so;
2471         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2472 #ifdef INET6
2473         if (INP_SOCKAF(so) == AF_INET6) {
2474                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2475                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2476                 }
2477                 if (MODULE_GLOBAL(ip6_v6only)) {
2478                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2479                 }
2480         }
2481 #endif
2482         inp->sctp_associd_counter = 1;
2483         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2484         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2485         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2486         inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable);
2487         inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable);
2488         if (SCTP_BASE_SYSCTL(sctp_auth_disable)) {
2489                 inp->auth_supported = 0;
2490         } else {
2491                 inp->auth_supported = 1;
2492         }
2493         inp->asconf_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_asconf_enable);
2494         inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2495         inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2496         inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2497         /* init the small hash table we use to track asocid <-> tcb */
2498         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2499         if (inp->sctp_asocidhash == NULL) {
2500                 crfree(inp->ip_inp.inp.inp_cred);
2501                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2502                 SCTP_INP_INFO_WUNLOCK();
2503                 return (ENOBUFS);
2504         }
2505 #ifdef IPSEC
2506         {
2507                 struct inpcbpolicy *pcb_sp = NULL;
2508
2509                 error = ipsec_init_policy(so, &pcb_sp);
2510                 /* Arrange to share the policy */
2511                 inp->ip_inp.inp.inp_sp = pcb_sp;
2512                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2513         }
2514         if (error != 0) {
2515                 crfree(inp->ip_inp.inp.inp_cred);
2516                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2517                 SCTP_INP_INFO_WUNLOCK();
2518                 return error;
2519         }
2520 #endif                          /* IPSEC */
2521         SCTP_INCR_EP_COUNT();
2522         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2523         SCTP_INP_INFO_WUNLOCK();
2524
2525         so->so_pcb = (caddr_t)inp;
2526
2527         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2528                 /* UDP style socket */
2529                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2530                     SCTP_PCB_FLAGS_UNBOUND);
2531                 /* Be sure it is NON-BLOCKING IO for UDP */
2532                 /* SCTP_SET_SO_NBIO(so); */
2533         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2534                 /* TCP style socket */
2535                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2536                     SCTP_PCB_FLAGS_UNBOUND);
2537                 /* Be sure we have blocking IO by default */
2538                 SCTP_CLEAR_SO_NBIO(so);
2539         } else {
2540                 /*
2541                  * unsupported socket type (RAW, etc)- in case we missed it
2542                  * in protosw
2543                  */
2544                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2545                 so->so_pcb = NULL;
2546                 crfree(inp->ip_inp.inp.inp_cred);
2547                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2548                 return (EOPNOTSUPP);
2549         }
2550         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2551                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2552                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2553         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2554                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2555                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2556         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2557                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2558                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2559         }
2560         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2561             &inp->sctp_hashmark);
2562         if (inp->sctp_tcbhash == NULL) {
2563                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2564                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2565                 so->so_pcb = NULL;
2566                 crfree(inp->ip_inp.inp.inp_cred);
2567                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2568                 return (ENOBUFS);
2569         }
2570         inp->def_vrf_id = vrf_id;
2571
2572         SCTP_INP_INFO_WLOCK();
2573         SCTP_INP_LOCK_INIT(inp);
2574         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2575         SCTP_INP_READ_INIT(inp);
2576         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2577         /* lock the new ep */
2578         SCTP_INP_WLOCK(inp);
2579
2580         /* add it to the info area */
2581         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2582         SCTP_INP_INFO_WUNLOCK();
2583
2584         TAILQ_INIT(&inp->read_queue);
2585         LIST_INIT(&inp->sctp_addr_list);
2586
2587         LIST_INIT(&inp->sctp_asoc_list);
2588
2589 #ifdef SCTP_TRACK_FREED_ASOCS
2590         /* TEMP CODE */
2591         LIST_INIT(&inp->sctp_asoc_free_list);
2592 #endif
2593         /* Init the timer structure for signature change */
2594         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2595         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2596
2597         /* now init the actual endpoint default data */
2598         m = &inp->sctp_ep;
2599
2600         /* setup the base timeout information */
2601         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2602         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2603         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2604         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2605         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2606         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2607         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2608         /* all max/min max are in ms */
2609         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2610         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2611         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2612         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2613         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2614         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2615         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2616         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2617         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2618         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2619         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2620         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2621         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2622
2623         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2624         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2625         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2626         /* number of streams to pre-open on a association */
2627         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2628
2629         /* Add adaptation cookie */
2630         m->adaptation_layer_indicator = 0;
2631         m->adaptation_layer_indicator_provided = 0;
2632
2633         /* seed random number generator */
2634         m->random_counter = 1;
2635         m->store_at = SCTP_SIGNATURE_SIZE;
2636         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2637         sctp_fill_random_store(m);
2638
2639         /* Minimum cookie size */
2640         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2641             sizeof(struct sctp_state_cookie);
2642         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2643
2644         /* Setup the initial secret */
2645         (void)SCTP_GETTIME_TIMEVAL(&time);
2646         m->time_of_secret_change = time.tv_sec;
2647
2648         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2649                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2650         }
2651         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2652
2653         /* How long is a cookie good for ? */
2654         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2655         /*
2656          * Initialize authentication parameters
2657          */
2658         m->local_hmacs = sctp_default_supported_hmaclist();
2659         m->local_auth_chunks = sctp_alloc_chunklist();
2660         if (inp->asconf_supported) {
2661                 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2662                 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2663         }
2664         m->default_dscp = 0;
2665 #ifdef INET6
2666         m->default_flowlabel = 0;
2667 #endif
2668         m->port = 0;            /* encapsulation disabled by default */
2669         LIST_INIT(&m->shared_keys);
2670         /* add default NULL key as key id 0 */
2671         null_key = sctp_alloc_sharedkey();
2672         sctp_insert_sharedkey(&m->shared_keys, null_key);
2673         SCTP_INP_WUNLOCK(inp);
2674 #ifdef SCTP_LOG_CLOSING
2675         sctp_log_closing(inp, NULL, 12);
2676 #endif
2677         return (error);
2678 }
2679
2680
2681 void
2682 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2683     struct sctp_tcb *stcb)
2684 {
2685         struct sctp_nets *net;
2686         uint16_t lport, rport;
2687         struct sctppcbhead *head;
2688         struct sctp_laddr *laddr, *oladdr;
2689
2690         atomic_add_int(&stcb->asoc.refcnt, 1);
2691         SCTP_TCB_UNLOCK(stcb);
2692         SCTP_INP_INFO_WLOCK();
2693         SCTP_INP_WLOCK(old_inp);
2694         SCTP_INP_WLOCK(new_inp);
2695         SCTP_TCB_LOCK(stcb);
2696         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2697
2698         new_inp->sctp_ep.time_of_secret_change =
2699             old_inp->sctp_ep.time_of_secret_change;
2700         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2701             sizeof(old_inp->sctp_ep.secret_key));
2702         new_inp->sctp_ep.current_secret_number =
2703             old_inp->sctp_ep.current_secret_number;
2704         new_inp->sctp_ep.last_secret_number =
2705             old_inp->sctp_ep.last_secret_number;
2706         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2707
2708         /* make it so new data pours into the new socket */
2709         stcb->sctp_socket = new_inp->sctp_socket;
2710         stcb->sctp_ep = new_inp;
2711
2712         /* Copy the port across */
2713         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2714         rport = stcb->rport;
2715         /* Pull the tcb from the old association */
2716         LIST_REMOVE(stcb, sctp_tcbhash);
2717         LIST_REMOVE(stcb, sctp_tcblist);
2718         if (stcb->asoc.in_asocid_hash) {
2719                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2720         }
2721         /* Now insert the new_inp into the TCP connected hash */
2722         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2723
2724         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2725         /* Its safe to access */
2726         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2727
2728         /* Now move the tcb into the endpoint list */
2729         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2730         /*
2731          * Question, do we even need to worry about the ep-hash since we
2732          * only have one connection? Probably not :> so lets get rid of it
2733          * and not suck up any kernel memory in that.
2734          */
2735         if (stcb->asoc.in_asocid_hash) {
2736                 struct sctpasochead *lhd;
2737
2738                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2739                     new_inp->hashasocidmark)];
2740                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2741         }
2742         /* Ok. Let's restart timer. */
2743         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2744                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2745                     stcb, net);
2746         }
2747
2748         SCTP_INP_INFO_WUNLOCK();
2749         if (new_inp->sctp_tcbhash != NULL) {
2750                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2751                 new_inp->sctp_tcbhash = NULL;
2752         }
2753         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2754                 /* Subset bound, so copy in the laddr list from the old_inp */
2755                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2756                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2757                         if (laddr == NULL) {
2758                                 /*
2759                                  * Gak, what can we do? This assoc is really
2760                                  * HOSED. We probably should send an abort
2761                                  * here.
2762                                  */
2763                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2764                                 continue;
2765                         }
2766                         SCTP_INCR_LADDR_COUNT();
2767                         bzero(laddr, sizeof(*laddr));
2768                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2769                         laddr->ifa = oladdr->ifa;
2770                         atomic_add_int(&laddr->ifa->refcount, 1);
2771                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2772                             sctp_nxt_addr);
2773                         new_inp->laddr_count++;
2774                         if (oladdr == stcb->asoc.last_used_address) {
2775                                 stcb->asoc.last_used_address = laddr;
2776                         }
2777                 }
2778         }
2779         /*
2780          * Now any running timers need to be adjusted since we really don't
2781          * care if they are running or not just blast in the new_inp into
2782          * all of them.
2783          */
2784
2785         stcb->asoc.dack_timer.ep = (void *)new_inp;
2786         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2787         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2788         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2789         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2790         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2791         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2792         /* now what about the nets? */
2793         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2794                 net->pmtu_timer.ep = (void *)new_inp;
2795                 net->hb_timer.ep = (void *)new_inp;
2796                 net->rxt_timer.ep = (void *)new_inp;
2797         }
2798         SCTP_INP_WUNLOCK(new_inp);
2799         SCTP_INP_WUNLOCK(old_inp);
2800 }
2801
2802
2803
2804
2805 /* sctp_ifap is used to bypass normal local address validation checks */
2806 int
2807 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2808     struct sctp_ifa *sctp_ifap, struct thread *p)
2809 {
2810         /* bind a ep to a socket address */
2811         struct sctppcbhead *head;
2812         struct sctp_inpcb *inp, *inp_tmp;
2813         struct inpcb *ip_inp;
2814         int port_reuse_active = 0;
2815         int bindall;
2816         uint16_t lport;
2817         int error;
2818         uint32_t vrf_id;
2819
2820         lport = 0;
2821         bindall = 1;
2822         inp = (struct sctp_inpcb *)so->so_pcb;
2823         ip_inp = (struct inpcb *)so->so_pcb;
2824 #ifdef SCTP_DEBUG
2825         if (addr) {
2826                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2827                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2828                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2829                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2830         }
2831 #endif
2832         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2833                 /* already did a bind, subsequent binds NOT allowed ! */
2834                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2835                 return (EINVAL);
2836         }
2837 #ifdef INVARIANTS
2838         if (p == NULL)
2839                 panic("null proc/thread");
2840 #endif
2841         if (addr != NULL) {
2842                 switch (addr->sa_family) {
2843 #ifdef INET
2844                 case AF_INET:
2845                         {
2846                                 struct sockaddr_in *sin;
2847
2848                                 /* IPV6_V6ONLY socket? */
2849                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2850                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2851                                         return (EINVAL);
2852                                 }
2853                                 if (addr->sa_len != sizeof(*sin)) {
2854                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2855                                         return (EINVAL);
2856                                 }
2857                                 sin = (struct sockaddr_in *)addr;
2858                                 lport = sin->sin_port;
2859                                 /*
2860                                  * For LOOPBACK the prison_local_ip4() call
2861                                  * will transmute the ip address to the
2862                                  * proper value.
2863                                  */
2864                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2865                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2866                                         return (error);
2867                                 }
2868                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2869                                         bindall = 0;
2870                                 }
2871                                 break;
2872                         }
2873 #endif
2874 #ifdef INET6
2875                 case AF_INET6:
2876                         {
2877                                 /*
2878                                  * Only for pure IPv6 Address. (No IPv4
2879                                  * Mapped!)
2880                                  */
2881                                 struct sockaddr_in6 *sin6;
2882
2883                                 sin6 = (struct sockaddr_in6 *)addr;
2884
2885                                 if (addr->sa_len != sizeof(*sin6)) {
2886                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2887                                         return (EINVAL);
2888                                 }
2889                                 lport = sin6->sin6_port;
2890                                 /*
2891                                  * For LOOPBACK the prison_local_ip6() call
2892                                  * will transmute the ipv6 address to the
2893                                  * proper value.
2894                                  */
2895                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2896                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2897                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2898                                         return (error);
2899                                 }
2900                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2901                                         bindall = 0;
2902                                         /* KAME hack: embed scopeid */
2903                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2904                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2905                                                 return (EINVAL);
2906                                         }
2907                                 }
2908                                 /* this must be cleared for ifa_ifwithaddr() */
2909                                 sin6->sin6_scope_id = 0;
2910                                 break;
2911                         }
2912 #endif
2913                 default:
2914                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2915                         return (EAFNOSUPPORT);
2916                 }
2917         }
2918         SCTP_INP_INFO_WLOCK();
2919         SCTP_INP_WLOCK(inp);
2920         /* Setup a vrf_id to be the default for the non-bind-all case. */
2921         vrf_id = inp->def_vrf_id;
2922
2923         /* increase our count due to the unlock we do */
2924         SCTP_INP_INCR_REF(inp);
2925         if (lport) {
2926                 /*
2927                  * Did the caller specify a port? if so we must see if an ep
2928                  * already has this one bound.
2929                  */
2930                 /* got to be root to get at low ports */
2931                 if (ntohs(lport) < IPPORT_RESERVED) {
2932                         if (p && (error =
2933                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2934                             )) {
2935                                 SCTP_INP_DECR_REF(inp);
2936                                 SCTP_INP_WUNLOCK(inp);
2937                                 SCTP_INP_INFO_WUNLOCK();
2938                                 return (error);
2939                         }
2940                 }
2941                 SCTP_INP_WUNLOCK(inp);
2942                 if (bindall) {
2943                         vrf_id = inp->def_vrf_id;
2944                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2945                         if (inp_tmp != NULL) {
2946                                 /*
2947                                  * lock guy returned and lower count note
2948                                  * that we are not bound so inp_tmp should
2949                                  * NEVER be inp. And it is this inp
2950                                  * (inp_tmp) that gets the reference bump,
2951                                  * so we must lower it.
2952                                  */
2953                                 SCTP_INP_DECR_REF(inp_tmp);
2954                                 /* unlock info */
2955                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2956                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2957                                         /*
2958                                          * Ok, must be one-2-one and
2959                                          * allowing port re-use
2960                                          */
2961                                         port_reuse_active = 1;
2962                                         goto continue_anyway;
2963                                 }
2964                                 SCTP_INP_DECR_REF(inp);
2965                                 SCTP_INP_INFO_WUNLOCK();
2966                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2967                                 return (EADDRINUSE);
2968                         }
2969                 } else {
2970                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2971                         if (inp_tmp != NULL) {
2972                                 /*
2973                                  * lock guy returned and lower count note
2974                                  * that we are not bound so inp_tmp should
2975                                  * NEVER be inp. And it is this inp
2976                                  * (inp_tmp) that gets the reference bump,
2977                                  * so we must lower it.
2978                                  */
2979                                 SCTP_INP_DECR_REF(inp_tmp);
2980                                 /* unlock info */
2981                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2982                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2983                                         /*
2984                                          * Ok, must be one-2-one and
2985                                          * allowing port re-use
2986                                          */
2987                                         port_reuse_active = 1;
2988                                         goto continue_anyway;
2989                                 }
2990                                 SCTP_INP_DECR_REF(inp);
2991                                 SCTP_INP_INFO_WUNLOCK();
2992                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2993                                 return (EADDRINUSE);
2994                         }
2995                 }
2996 continue_anyway:
2997                 SCTP_INP_WLOCK(inp);
2998                 if (bindall) {
2999                         /* verify that no lport is not used by a singleton */
3000                         if ((port_reuse_active == 0) &&
3001                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
3002                                 /* Sorry someone already has this one bound */
3003                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3004                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3005                                         port_reuse_active = 1;
3006                                 } else {
3007                                         SCTP_INP_DECR_REF(inp);
3008                                         SCTP_INP_WUNLOCK(inp);
3009                                         SCTP_INP_INFO_WUNLOCK();
3010                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3011                                         return (EADDRINUSE);
3012                                 }
3013                         }
3014                 }
3015         } else {
3016                 uint16_t first, last, candidate;
3017                 uint16_t count;
3018                 int done;
3019
3020                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3021                         first = MODULE_GLOBAL(ipport_hifirstauto);
3022                         last = MODULE_GLOBAL(ipport_hilastauto);
3023                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3024                         if (p && (error =
3025                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3026                             )) {
3027                                 SCTP_INP_DECR_REF(inp);
3028                                 SCTP_INP_WUNLOCK(inp);
3029                                 SCTP_INP_INFO_WUNLOCK();
3030                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3031                                 return (error);
3032                         }
3033                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3034                         last = MODULE_GLOBAL(ipport_lowlastauto);
3035                 } else {
3036                         first = MODULE_GLOBAL(ipport_firstauto);
3037                         last = MODULE_GLOBAL(ipport_lastauto);
3038                 }
3039                 if (first > last) {
3040                         uint16_t temp;
3041
3042                         temp = first;
3043                         first = last;
3044                         last = temp;
3045                 }
3046                 count = last - first + 1;       /* number of candidates */
3047                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3048
3049                 done = 0;
3050                 while (!done) {
3051                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3052                                 done = 1;
3053                         }
3054                         if (!done) {
3055                                 if (--count == 0) {
3056                                         SCTP_INP_DECR_REF(inp);
3057                                         SCTP_INP_WUNLOCK(inp);
3058                                         SCTP_INP_INFO_WUNLOCK();
3059                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3060                                         return (EADDRINUSE);
3061                                 }
3062                                 if (candidate == last)
3063                                         candidate = first;
3064                                 else
3065                                         candidate = candidate + 1;
3066                         }
3067                 }
3068                 lport = htons(candidate);
3069         }
3070         SCTP_INP_DECR_REF(inp);
3071         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3072             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3073                 /*
3074                  * this really should not happen. The guy did a non-blocking
3075                  * bind and then did a close at the same time.
3076                  */
3077                 SCTP_INP_WUNLOCK(inp);
3078                 SCTP_INP_INFO_WUNLOCK();
3079                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3080                 return (EINVAL);
3081         }
3082         /* ok we look clear to give out this port, so lets setup the binding */
3083         if (bindall) {
3084                 /* binding to all addresses, so just set in the proper flags */
3085                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3086                 /* set the automatic addr changes from kernel flag */
3087                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3088                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3089                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3090                 } else {
3091                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3092                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3093                 }
3094                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3095                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3096                 } else {
3097                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3098                 }
3099                 /*
3100                  * set the automatic mobility_base from kernel flag (by
3101                  * micchie)
3102                  */
3103                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3104                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3105                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3106                 } else {
3107                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3108                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3109                 }
3110                 /*
3111                  * set the automatic mobility_fasthandoff from kernel flag
3112                  * (by micchie)
3113                  */
3114                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3115                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3116                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3117                 } else {
3118                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3119                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3120                 }
3121         } else {
3122                 /*
3123                  * bind specific, make sure flags is off and add a new
3124                  * address structure to the sctp_addr_list inside the ep
3125                  * structure.
3126                  *
3127                  * We will need to allocate one and insert it at the head. The
3128                  * socketopt call can just insert new addresses in there as
3129                  * well. It will also have to do the embed scope kame hack
3130                  * too (before adding).
3131                  */
3132                 struct sctp_ifa *ifa;
3133                 union sctp_sockstore store;
3134
3135                 memset(&store, 0, sizeof(store));
3136                 switch (addr->sa_family) {
3137 #ifdef INET
3138                 case AF_INET:
3139                         memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3140                         store.sin.sin_port = 0;
3141                         break;
3142 #endif
3143 #ifdef INET6
3144                 case AF_INET6:
3145                         memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3146                         store.sin6.sin6_port = 0;
3147                         break;
3148 #endif
3149                 default:
3150                         break;
3151                 }
3152                 /*
3153                  * first find the interface with the bound address need to
3154                  * zero out the port to find the address! yuck! can't do
3155                  * this earlier since need port for sctp_pcb_findep()
3156                  */
3157                 if (sctp_ifap != NULL) {
3158                         ifa = sctp_ifap;
3159                 } else {
3160                         /*
3161                          * Note for BSD we hit here always other O/S's will
3162                          * pass things in via the sctp_ifap argument
3163                          * (Panda).
3164                          */
3165                         ifa = sctp_find_ifa_by_addr(&store.sa,
3166                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3167                 }
3168                 if (ifa == NULL) {
3169                         /* Can't find an interface with that address */
3170                         SCTP_INP_WUNLOCK(inp);
3171                         SCTP_INP_INFO_WUNLOCK();
3172                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3173                         return (EADDRNOTAVAIL);
3174                 }
3175 #ifdef INET6
3176                 if (addr->sa_family == AF_INET6) {
3177                         /* GAK, more FIXME IFA lock? */
3178                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3179                                 /* Can't bind a non-existent addr. */
3180                                 SCTP_INP_WUNLOCK(inp);
3181                                 SCTP_INP_INFO_WUNLOCK();
3182                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3183                                 return (EINVAL);
3184                         }
3185                 }
3186 #endif
3187                 /* we're not bound all */
3188                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3189                 /* allow bindx() to send ASCONF's for binding changes */
3190                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3191                 /* clear automatic addr changes from kernel flag */
3192                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3193
3194                 /* add this address to the endpoint list */
3195                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3196                 if (error != 0) {
3197                         SCTP_INP_WUNLOCK(inp);
3198                         SCTP_INP_INFO_WUNLOCK();
3199                         return (error);
3200                 }
3201                 inp->laddr_count++;
3202         }
3203         /* find the bucket */
3204         if (port_reuse_active) {
3205                 /* Put it into tcp 1-2-1 hash */
3206                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3207                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3208         } else {
3209                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3210         }
3211         /* put it in the bucket */
3212         LIST_INSERT_HEAD(head, inp, sctp_hash);
3213         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3214             (void *)head, ntohs(lport), port_reuse_active);
3215         /* set in the port */
3216         inp->sctp_lport = lport;
3217
3218         /* turn off just the unbound flag */
3219         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3220         SCTP_INP_WUNLOCK(inp);
3221         SCTP_INP_INFO_WUNLOCK();
3222         return (0);
3223 }
3224
3225
3226 static void
3227 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3228 {
3229         struct sctp_iterator *it, *nit;
3230
3231         /*
3232          * We enter with the only the ITERATOR_LOCK in place and a write
3233          * lock on the inp_info stuff.
3234          */
3235         it = sctp_it_ctl.cur_it;
3236         if (it && (it->vn != curvnet)) {
3237                 /* Its not looking at our VNET */
3238                 return;
3239         }
3240         if (it && (it->inp == inp)) {
3241                 /*
3242                  * This is tricky and we hold the iterator lock, but when it
3243                  * returns and gets the lock (when we release it) the
3244                  * iterator will try to operate on inp. We need to stop that
3245                  * from happening. But of course the iterator has a
3246                  * reference on the stcb and inp. We can mark it and it will
3247                  * stop.
3248                  *
3249                  * If its a single iterator situation, we set the end iterator
3250                  * flag. Otherwise we set the iterator to go to the next
3251                  * inp.
3252                  *
3253                  */
3254                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3255                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3256                 } else {
3257                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3258                 }
3259         }
3260         /*
3261          * Now go through and remove any single reference to our inp that
3262          * may be still pending on the list
3263          */
3264         SCTP_IPI_ITERATOR_WQ_LOCK();
3265         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3266                 if (it->vn != curvnet) {
3267                         continue;
3268                 }
3269                 if (it->inp == inp) {
3270                         /* This one points to me is it inp specific? */
3271                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3272                                 /* Remove and free this one */
3273                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3274                                     it, sctp_nxt_itr);
3275                                 if (it->function_atend != NULL) {
3276                                         (*it->function_atend) (it->pointer, it->val);
3277                                 }
3278                                 SCTP_FREE(it, SCTP_M_ITER);
3279                         } else {
3280                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3281                                 if (it->inp) {
3282                                         SCTP_INP_INCR_REF(it->inp);
3283                                 }
3284                         }
3285                         /*
3286                          * When its put in the refcnt is incremented so decr
3287                          * it
3288                          */
3289                         SCTP_INP_DECR_REF(inp);
3290                 }
3291         }
3292         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3293 }
3294
3295 /* release sctp_inpcb unbind the port */
3296 void
3297 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3298 {
3299         /*
3300          * Here we free a endpoint. We must find it (if it is in the Hash
3301          * table) and remove it from there. Then we must also find it in the
3302          * overall list and remove it from there. After all removals are
3303          * complete then any timer has to be stopped. Then start the actual
3304          * freeing. a) Any local lists. b) Any associations. c) The hash of
3305          * all associations. d) finally the ep itself.
3306          */
3307         struct sctp_tcb *asoc, *nasoc;
3308         struct sctp_laddr *laddr, *nladdr;
3309         struct inpcb *ip_pcb;
3310         struct socket *so;
3311         int being_refed = 0;
3312         struct sctp_queued_to_read *sq, *nsq;
3313         int cnt;
3314         sctp_sharedkey_t *shared_key, *nshared_key;
3315
3316
3317 #ifdef SCTP_LOG_CLOSING
3318         sctp_log_closing(inp, NULL, 0);
3319 #endif
3320         SCTP_ITERATOR_LOCK();
3321         /* mark any iterators on the list or being processed */
3322         sctp_iterator_inp_being_freed(inp);
3323         SCTP_ITERATOR_UNLOCK();
3324         so = inp->sctp_socket;
3325         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3326                 /* been here before.. eeks.. get out of here */
3327                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3328 #ifdef SCTP_LOG_CLOSING
3329                 sctp_log_closing(inp, NULL, 1);
3330 #endif
3331                 return;
3332         }
3333         SCTP_ASOC_CREATE_LOCK(inp);
3334         SCTP_INP_INFO_WLOCK();
3335
3336         SCTP_INP_WLOCK(inp);
3337         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3338                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3339                 /* socket is gone, so no more wakeups allowed */
3340                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3341                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3342                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3343
3344         }
3345         /* First time through we have the socket lock, after that no more. */
3346         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3347             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3348
3349         if (inp->control) {
3350                 sctp_m_freem(inp->control);
3351                 inp->control = NULL;
3352         }
3353         if (inp->pkt) {
3354                 sctp_m_freem(inp->pkt);
3355                 inp->pkt = NULL;
3356         }
3357         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3358                                          * here but I will be nice :> (i.e.
3359                                          * ip_pcb = ep;) */
3360         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3361                 int cnt_in_sd;
3362
3363                 cnt_in_sd = 0;
3364                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3365                         SCTP_TCB_LOCK(asoc);
3366                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3367                                 /* Skip guys being freed */
3368                                 cnt_in_sd++;
3369                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3370                                         /*
3371                                          * Special case - we did not start a
3372                                          * kill timer on the asoc due to it
3373                                          * was not closed. So go ahead and
3374                                          * start it now.
3375                                          */
3376                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3377                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3378                                 }
3379                                 SCTP_TCB_UNLOCK(asoc);
3380                                 continue;
3381                         }
3382                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3383                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3384                             (asoc->asoc.total_output_queue_size == 0)) {
3385                                 /*
3386                                  * If we have data in queue, we don't want
3387                                  * to just free since the app may have done,
3388                                  * send()/close or connect/send/close. And
3389                                  * it wants the data to get across first.
3390                                  */
3391                                 /* Just abandon things in the front states */
3392                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3393                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3394                                         cnt_in_sd++;
3395                                 }
3396                                 continue;
3397                         }
3398                         /* Disconnect the socket please */
3399                         asoc->sctp_socket = NULL;
3400                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3401                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3402                             (asoc->asoc.control_pdapi) ||
3403                             (asoc->asoc.size_on_all_streams > 0) ||
3404                             (so && (so->so_rcv.sb_cc > 0))) {
3405                                 /* Left with Data unread */
3406                                 struct mbuf *op_err;
3407
3408                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3409                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3410                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3411                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3412                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3413                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3414                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3415                                 }
3416                                 if (sctp_free_assoc(inp, asoc,
3417                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3418                                         cnt_in_sd++;
3419                                 }
3420                                 continue;
3421                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3422                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3423                             (asoc->asoc.stream_queue_cnt == 0)) {
3424                                 if (asoc->asoc.locked_on_sending) {
3425                                         goto abort_anyway;
3426                                 }
3427                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3428                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3429                                         struct sctp_nets *netp;
3430
3431                                         /*
3432                                          * there is nothing queued to send,
3433                                          * so I send shutdown
3434                                          */
3435                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3436                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3437                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3438                                         }
3439                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3440                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3441                                         sctp_stop_timers_for_shutdown(asoc);
3442                                         if (asoc->asoc.alternate) {
3443                                                 netp = asoc->asoc.alternate;
3444                                         } else {
3445                                                 netp = asoc->asoc.primary_destination;
3446                                         }
3447                                         sctp_send_shutdown(asoc, netp);
3448                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3449                                             netp);
3450                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3451                                             asoc->asoc.primary_destination);
3452                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3453                                 }
3454                         } else {
3455                                 /* mark into shutdown pending */
3456                                 struct sctp_stream_queue_pending *sp;
3457
3458                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3459                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3460                                     asoc->asoc.primary_destination);
3461                                 if (asoc->asoc.locked_on_sending) {
3462                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3463                                             sctp_streamhead);
3464                                         if (sp == NULL) {
3465                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3466                                                     (void *)asoc->asoc.locked_on_sending,
3467                                                     asoc->asoc.locked_on_sending->stream_no);
3468                                         } else {
3469                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3470                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3471                                         }
3472                                 }
3473                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3474                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3475                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3476                                         struct mbuf *op_err;
3477
3478                         abort_anyway:
3479                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3480                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3481                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3482                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3483                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3484                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3485                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3486                                         }
3487                                         if (sctp_free_assoc(inp, asoc,
3488                                             SCTP_PCBFREE_NOFORCE,
3489                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3490                                                 cnt_in_sd++;
3491                                         }
3492                                         continue;
3493                                 } else {
3494                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3495                                 }
3496                         }
3497                         cnt_in_sd++;
3498                         SCTP_TCB_UNLOCK(asoc);
3499                 }
3500                 /* now is there some left in our SHUTDOWN state? */
3501                 if (cnt_in_sd) {
3502 #ifdef SCTP_LOG_CLOSING
3503                         sctp_log_closing(inp, NULL, 2);
3504 #endif
3505                         inp->sctp_socket = NULL;
3506                         SCTP_INP_WUNLOCK(inp);
3507                         SCTP_ASOC_CREATE_UNLOCK(inp);
3508                         SCTP_INP_INFO_WUNLOCK();
3509                         return;
3510                 }
3511         }
3512         inp->sctp_socket = NULL;
3513         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3514             SCTP_PCB_FLAGS_UNBOUND) {
3515                 /*
3516                  * ok, this guy has been bound. It's port is somewhere in
3517                  * the SCTP_BASE_INFO(hash table). Remove it!
3518                  */
3519                 LIST_REMOVE(inp, sctp_hash);
3520                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3521         }
3522         /*
3523          * If there is a timer running to kill us, forget it, since it may
3524          * have a contest on the INP lock.. which would cause us to die ...
3525          */
3526         cnt = 0;
3527         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3528                 SCTP_TCB_LOCK(asoc);
3529                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3530                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3531                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3532                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3533                         }
3534                         cnt++;
3535                         SCTP_TCB_UNLOCK(asoc);
3536                         continue;
3537                 }
3538                 /* Free associations that are NOT killing us */
3539                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3540                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3541                         struct mbuf *op_err;
3542
3543                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3544                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3545                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3546                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3547                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3548                         cnt++;
3549                         SCTP_TCB_UNLOCK(asoc);
3550                         continue;
3551                 }
3552                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3553                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3554                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3555                 }
3556                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3557                         cnt++;
3558                 }
3559         }
3560         if (cnt) {
3561                 /* Ok we have someone out there that will kill us */
3562                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3563 #ifdef SCTP_LOG_CLOSING
3564                 sctp_log_closing(inp, NULL, 3);
3565 #endif
3566                 SCTP_INP_WUNLOCK(inp);
3567                 SCTP_ASOC_CREATE_UNLOCK(inp);
3568                 SCTP_INP_INFO_WUNLOCK();
3569                 return;
3570         }
3571         if (SCTP_INP_LOCK_CONTENDED(inp))
3572                 being_refed++;
3573         if (SCTP_INP_READ_CONTENDED(inp))
3574                 being_refed++;
3575         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3576                 being_refed++;
3577
3578         if ((inp->refcount) ||
3579             (being_refed) ||
3580             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3581                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3582 #ifdef SCTP_LOG_CLOSING
3583                 sctp_log_closing(inp, NULL, 4);
3584 #endif
3585                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3586                 SCTP_INP_WUNLOCK(inp);
3587                 SCTP_ASOC_CREATE_UNLOCK(inp);
3588                 SCTP_INP_INFO_WUNLOCK();
3589                 return;
3590         }
3591         inp->sctp_ep.signature_change.type = 0;
3592         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3593         /*
3594          * Remove it from the list .. last thing we need a lock for.
3595          */
3596         LIST_REMOVE(inp, sctp_list);
3597         SCTP_INP_WUNLOCK(inp);
3598         SCTP_ASOC_CREATE_UNLOCK(inp);
3599         SCTP_INP_INFO_WUNLOCK();
3600         /*
3601          * Now we release all locks. Since this INP cannot be found anymore
3602          * except possibly by the kill timer that might be running. We call
3603          * the drain function here. It should hit the case were it sees the
3604          * ACTIVE flag cleared and exit out freeing us to proceed and
3605          * destroy everything.
3606          */
3607         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3608                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3609         } else {
3610                 /* Probably un-needed */
3611                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3612         }
3613
3614 #ifdef SCTP_LOG_CLOSING
3615         sctp_log_closing(inp, NULL, 5);
3616 #endif
3617
3618
3619         if ((inp->sctp_asocidhash) != NULL) {
3620                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3621                 inp->sctp_asocidhash = NULL;
3622         }
3623         /* sa_ignore FREED_MEMORY */
3624         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3625                 /* Its only abandoned if it had data left */
3626                 if (sq->length)
3627                         SCTP_STAT_INCR(sctps_left_abandon);
3628
3629                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3630                 sctp_free_remote_addr(sq->whoFrom);
3631                 if (so)
3632                         so->so_rcv.sb_cc -= sq->length;
3633                 if (sq->data) {
3634                         sctp_m_freem(sq->data);
3635                         sq->data = NULL;
3636                 }
3637                 /*
3638                  * no need to free the net count, since at this point all
3639                  * assoc's are gone.
3640                  */
3641                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3642                 SCTP_DECR_READQ_COUNT();
3643         }
3644         /* Now the sctp_pcb things */
3645         /*
3646          * free each asoc if it is not already closed/free. we can't use the
3647          * macro here since le_next will get freed as part of the
3648          * sctp_free_assoc() call.
3649          */
3650         if (so) {
3651 #ifdef IPSEC
3652                 ipsec_delete_pcbpolicy(ip_pcb);
3653 #endif                          /* IPSEC */
3654
3655                 /* Unlocks not needed since the socket is gone now */
3656         }
3657         if (ip_pcb->inp_options) {
3658                 (void)sctp_m_free(ip_pcb->inp_options);
3659                 ip_pcb->inp_options = 0;
3660         }
3661 #ifdef INET6
3662         if (ip_pcb->inp_vflag & INP_IPV6) {
3663                 struct in6pcb *in6p;
3664
3665                 in6p = (struct in6pcb *)inp;
3666                 ip6_freepcbopts(in6p->in6p_outputopts);
3667         }
3668 #endif                          /* INET6 */
3669         ip_pcb->inp_vflag = 0;
3670         /* free up authentication fields */
3671         if (inp->sctp_ep.local_auth_chunks != NULL)
3672                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3673         if (inp->sctp_ep.local_hmacs != NULL)
3674                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3675
3676         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3677                 LIST_REMOVE(shared_key, next);
3678                 sctp_free_sharedkey(shared_key);
3679                 /* sa_ignore FREED_MEMORY */
3680         }
3681
3682         /*
3683          * if we have an address list the following will free the list of
3684          * ifaddr's that are set into this ep. Again macro limitations here,
3685          * since the LIST_FOREACH could be a bad idea.
3686          */
3687         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3688                 sctp_remove_laddr(laddr);
3689         }
3690
3691 #ifdef SCTP_TRACK_FREED_ASOCS
3692         /* TEMP CODE */
3693         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3694                 LIST_REMOVE(asoc, sctp_tcblist);
3695                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3696                 SCTP_DECR_ASOC_COUNT();
3697         }
3698         /* *** END TEMP CODE *** */
3699 #endif
3700         /* Now lets see about freeing the EP hash table. */
3701         if (inp->sctp_tcbhash != NULL) {
3702                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3703                 inp->sctp_tcbhash = NULL;
3704         }
3705         /* Now we must put the ep memory back into the zone pool */
3706         crfree(inp->ip_inp.inp.inp_cred);
3707         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3708         SCTP_INP_LOCK_DESTROY(inp);
3709         SCTP_INP_READ_DESTROY(inp);
3710         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3711         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3712         SCTP_DECR_EP_COUNT();
3713 }
3714
3715
3716 struct sctp_nets *
3717 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3718 {
3719         struct sctp_nets *net;
3720
3721         /* locate the address */
3722         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3723                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3724                         return (net);
3725         }
3726         return (NULL);
3727 }
3728
3729
3730 int
3731 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3732 {
3733         struct sctp_ifa *sctp_ifa;
3734
3735         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3736         if (sctp_ifa) {
3737                 return (1);
3738         } else {
3739                 return (0);
3740         }
3741 }
3742
3743 /*
3744  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3745  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3746  * stats of stuff.
3747  */
3748 int
3749 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3750     struct sctp_nets **netp, int set_scope, int from)
3751 {
3752         /*
3753          * The following is redundant to the same lines in the
3754          * sctp_aloc_assoc() but is needed since others call the add address
3755          * function
3756          */
3757         struct sctp_nets *net, *netfirst;
3758         int addr_inscope;
3759
3760         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3761             from);
3762         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3763
3764         netfirst = sctp_findnet(stcb, newaddr);
3765         if (netfirst) {
3766                 /*
3767                  * Lie and return ok, we don't want to make the association
3768                  * go away for this behavior. It will happen in the TCP
3769                  * model in a connected socket. It does not reach the hash
3770                  * table until after the association is built so it can't be
3771                  * found. Mark as reachable, since the initial creation will
3772                  * have been cleared and the NOT_IN_ASSOC flag will have
3773                  * been added... and we don't want to end up removing it
3774                  * back out.
3775                  */
3776                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3777                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3778                             SCTP_ADDR_UNCONFIRMED);
3779                 } else {
3780                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3781                 }
3782
3783                 return (0);
3784         }
3785         addr_inscope = 1;
3786         switch (newaddr->sa_family) {
3787 #ifdef INET
3788         case AF_INET:
3789                 {
3790                         struct sockaddr_in *sin;
3791
3792                         sin = (struct sockaddr_in *)newaddr;
3793                         if (sin->sin_addr.s_addr == 0) {
3794                                 /* Invalid address */
3795                                 return (-1);
3796                         }
3797                         /* zero out the bzero area */
3798                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3799
3800                         /* assure len is set */
3801                         sin->sin_len = sizeof(struct sockaddr_in);
3802                         if (set_scope) {
3803 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3804                                 stcb->asoc.scope.ipv4_local_scope = 1;
3805 #else
3806                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3807                                         stcb->asoc.scope.ipv4_local_scope = 1;
3808                                 }
3809 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3810                         } else {
3811                                 /* Validate the address is in scope */
3812                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3813                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3814                                         addr_inscope = 0;
3815                                 }
3816                         }
3817                         break;
3818                 }
3819 #endif
3820 #ifdef INET6
3821         case AF_INET6:
3822                 {
3823                         struct sockaddr_in6 *sin6;
3824
3825                         sin6 = (struct sockaddr_in6 *)newaddr;
3826                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3827                                 /* Invalid address */
3828                                 return (-1);
3829                         }
3830                         /* assure len is set */
3831                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3832                         if (set_scope) {
3833                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3834                                         stcb->asoc.scope.loopback_scope = 1;
3835                                         stcb->asoc.scope.local_scope = 0;
3836                                         stcb->asoc.scope.ipv4_local_scope = 1;
3837                                         stcb->asoc.scope.site_scope = 1;
3838                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3839                                         /*
3840                                          * If the new destination is a
3841                                          * LINK_LOCAL we must have common
3842                                          * site scope. Don't set the local
3843                                          * scope since we may not share all
3844                                          * links, only loopback can do this.
3845                                          * Links on the local network would
3846                                          * also be on our private network
3847                                          * for v4 too.
3848                                          */
3849                                         stcb->asoc.scope.ipv4_local_scope = 1;
3850                                         stcb->asoc.scope.site_scope = 1;
3851                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3852                                         /*
3853                                          * If the new destination is
3854                                          * SITE_LOCAL then we must have site
3855                                          * scope in common.
3856                                          */
3857                                         stcb->asoc.scope.site_scope = 1;
3858                                 }
3859                         } else {
3860                                 /* Validate the address is in scope */
3861                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3862                                     (stcb->asoc.scope.loopback_scope == 0)) {
3863                                         addr_inscope = 0;
3864                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3865                                     (stcb->asoc.scope.local_scope == 0)) {
3866                                         addr_inscope = 0;
3867                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3868                                     (stcb->asoc.scope.site_scope == 0)) {
3869                                         addr_inscope = 0;
3870                                 }
3871                         }
3872                         break;
3873                 }
3874 #endif
3875         default:
3876                 /* not supported family type */
3877                 return (-1);
3878         }
3879         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3880         if (net == NULL) {
3881                 return (-1);
3882         }
3883         SCTP_INCR_RADDR_COUNT();
3884         bzero(net, sizeof(struct sctp_nets));
3885         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3886         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3887         switch (newaddr->sa_family) {
3888 #ifdef INET
3889         case AF_INET:
3890                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3891                 break;
3892 #endif
3893 #ifdef INET6
3894         case AF_INET6:
3895                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3896                 break;
3897 #endif
3898         default:
3899                 break;
3900         }
3901         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3902         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3903                 stcb->asoc.scope.loopback_scope = 1;
3904                 stcb->asoc.scope.ipv4_local_scope = 1;
3905                 stcb->asoc.scope.local_scope = 0;
3906                 stcb->asoc.scope.site_scope = 1;
3907                 addr_inscope = 1;
3908         }
3909         net->failure_threshold = stcb->asoc.def_net_failure;
3910         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3911         if (addr_inscope == 0) {
3912                 net->dest_state = (SCTP_ADDR_REACHABLE |
3913                     SCTP_ADDR_OUT_OF_SCOPE);
3914         } else {
3915                 if (from == SCTP_ADDR_IS_CONFIRMED)
3916                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3917                         net->dest_state = SCTP_ADDR_REACHABLE;
3918                 else
3919                         net->dest_state = SCTP_ADDR_REACHABLE |
3920                             SCTP_ADDR_UNCONFIRMED;
3921         }
3922         /*
3923          * We set this to 0, the timer code knows that this means its an
3924          * initial value
3925          */
3926         net->rto_needed = 1;
3927         net->RTO = 0;
3928         net->RTO_measured = 0;
3929         stcb->asoc.numnets++;
3930         net->ref_count = 1;
3931         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3932         net->port = stcb->asoc.port;
3933         net->dscp = stcb->asoc.default_dscp;
3934 #ifdef INET6
3935         net->flowlabel = stcb->asoc.default_flowlabel;
3936 #endif
3937         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3938                 net->dest_state |= SCTP_ADDR_NOHB;
3939         } else {
3940                 net->dest_state &= ~SCTP_ADDR_NOHB;
3941         }
3942         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3943                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3944         } else {
3945                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3946         }
3947         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3948         /* Init the timer structure */
3949         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3950         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3951         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3952
3953         /* Now generate a route for this guy */
3954 #ifdef INET6
3955         /* KAME hack: embed scopeid */
3956         if (newaddr->sa_family == AF_INET6) {
3957                 struct sockaddr_in6 *sin6;
3958
3959                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3960                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3961                 sin6->sin6_scope_id = 0;
3962         }
3963 #endif
3964         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3965
3966         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3967                 /* Get source address */
3968                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3969                     stcb,
3970                     (sctp_route_t *) & net->ro,
3971                     net,
3972                     0,
3973                     stcb->asoc.vrf_id);
3974                 if (net->ro._s_addr != NULL) {
3975                         net->src_addr_selected = 1;
3976                         /* Now get the interface MTU */
3977                         if (net->ro._s_addr->ifn_p != NULL) {
3978                                 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3979                         }
3980                 } else {
3981                         net->src_addr_selected = 0;
3982                 }
3983                 if (net->mtu > 0) {
3984                         uint32_t rmtu;
3985
3986                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3987                         if (rmtu == 0) {
3988                                 /*
3989                                  * Start things off to match mtu of
3990                                  * interface please.
3991                                  */
3992                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3993                                     net->ro.ro_rt, net->mtu);
3994                         } else {
3995                                 /*
3996                                  * we take the route mtu over the interface,
3997                                  * since the route may be leading out the
3998                                  * loopback, or a different interface.
3999                                  */
4000                                 net->mtu = rmtu;
4001                         }
4002                 }
4003         } else {
4004                 net->src_addr_selected = 0;
4005         }
4006         if (net->mtu == 0) {
4007                 switch (newaddr->sa_family) {
4008 #ifdef INET
4009                 case AF_INET:
4010                         net->mtu = SCTP_DEFAULT_MTU;
4011                         break;
4012 #endif
4013 #ifdef INET6
4014                 case AF_INET6:
4015                         net->mtu = 1280;
4016                         break;
4017 #endif
4018                 default:
4019                         break;
4020                 }
4021         }
4022 #if defined(INET) || defined(INET6)
4023         if (net->port) {
4024                 net->mtu -= (uint32_t) sizeof(struct udphdr);
4025         }
4026 #endif
4027         if (from == SCTP_ALLOC_ASOC) {
4028                 stcb->asoc.smallest_mtu = net->mtu;
4029         }
4030         if (stcb->asoc.smallest_mtu > net->mtu) {
4031                 stcb->asoc.smallest_mtu = net->mtu;
4032         }
4033 #ifdef INET6
4034         if (newaddr->sa_family == AF_INET6) {
4035                 struct sockaddr_in6 *sin6;
4036
4037                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4038                 (void)sa6_recoverscope(sin6);
4039         }
4040 #endif
4041
4042         /* JRS - Use the congestion control given in the CC module */
4043         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4044                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4045
4046         /*
4047          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4048          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4049          */
4050         net->find_pseudo_cumack = 1;
4051         net->find_rtx_pseudo_cumack = 1;
4052         /* Choose an initial flowid. */
4053         net->flowid = stcb->asoc.my_vtag ^
4054             ntohs(stcb->rport) ^
4055             ntohs(stcb->sctp_ep->sctp_lport);
4056 #ifdef INVARIANTS
4057         net->flowidset = 1;
4058 #endif
4059         if (netp) {
4060                 *netp = net;
4061         }
4062         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4063         if (net->ro.ro_rt == NULL) {
4064                 /* Since we have no route put it at the back */
4065                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4066         } else if (netfirst == NULL) {
4067                 /* We are the first one in the pool. */
4068                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4069         } else if (netfirst->ro.ro_rt == NULL) {
4070                 /*
4071                  * First one has NO route. Place this one ahead of the first
4072                  * one.
4073                  */
4074                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4075         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4076                 /*
4077                  * This one has a different interface than the one at the
4078                  * top of the list. Place it ahead.
4079                  */
4080                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4081         } else {
4082                 /*
4083                  * Ok we have the same interface as the first one. Move
4084                  * forward until we find either a) one with a NULL route...
4085                  * insert ahead of that b) one with a different ifp.. insert
4086                  * after that. c) end of the list.. insert at the tail.
4087                  */
4088                 struct sctp_nets *netlook;
4089
4090                 do {
4091                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4092                         if (netlook == NULL) {
4093                                 /* End of the list */
4094                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4095                                 break;
4096                         } else if (netlook->ro.ro_rt == NULL) {
4097                                 /* next one has NO route */
4098                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4099                                 break;
4100                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4101                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4102                                     net, sctp_next);
4103                                 break;
4104                         }
4105                         /* Shift forward */
4106                         netfirst = netlook;
4107                 } while (netlook != NULL);
4108         }
4109
4110         /* got to have a primary set */
4111         if (stcb->asoc.primary_destination == 0) {
4112                 stcb->asoc.primary_destination = net;
4113         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4114                     (net->ro.ro_rt) &&
4115             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4116                 /* No route to current primary adopt new primary */
4117                 stcb->asoc.primary_destination = net;
4118         }
4119         /* Validate primary is first */
4120         net = TAILQ_FIRST(&stcb->asoc.nets);
4121         if ((net != stcb->asoc.primary_destination) &&
4122             (stcb->asoc.primary_destination)) {
4123                 /*
4124                  * first one on the list is NOT the primary sctp_cmpaddr()
4125                  * is much more efficient if the primary is the first on the
4126                  * list, make it so.
4127                  */
4128                 TAILQ_REMOVE(&stcb->asoc.nets,
4129                     stcb->asoc.primary_destination, sctp_next);
4130                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4131                     stcb->asoc.primary_destination, sctp_next);
4132         }
4133         return (0);
4134 }
4135
4136
4137 static uint32_t
4138 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4139 {
4140         uint32_t id;
4141         struct sctpasochead *head;
4142         struct sctp_tcb *lstcb;
4143
4144         SCTP_INP_WLOCK(inp);
4145 try_again:
4146         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4147                 /* TSNH */
4148                 SCTP_INP_WUNLOCK(inp);
4149                 return (0);
4150         }
4151         /*
4152          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4153          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4154          */
4155         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4156                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4157         }
4158         id = inp->sctp_associd_counter;
4159         inp->sctp_associd_counter++;
4160         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4161         if (lstcb) {
4162                 goto try_again;
4163         }
4164         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4165         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4166         stcb->asoc.in_asocid_hash = 1;
4167         SCTP_INP_WUNLOCK(inp);
4168         return id;
4169 }
4170
4171 /*
4172  * allocate an association and add it to the endpoint. The caller must be
4173  * careful to add all additional addresses once they are know right away or
4174  * else the assoc will be may experience a blackout scenario.
4175  */
4176 struct sctp_tcb *
4177 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4178     int *error, uint32_t override_tag, uint32_t vrf_id,
4179     struct thread *p
4180 )
4181 {
4182         /* note the p argument is only valid in unbound sockets */
4183
4184         struct sctp_tcb *stcb;
4185         struct sctp_association *asoc;
4186         struct sctpasochead *head;
4187         uint16_t rport;
4188         int err;
4189
4190         /*
4191          * Assumption made here: Caller has done a
4192          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4193          * address does not exist already.
4194          */
4195         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4196                 /* Hit max assoc, sorry no more */
4197                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4198                 *error = ENOBUFS;
4199                 return (NULL);
4200         }
4201         if (firstaddr == NULL) {
4202                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4203                 *error = EINVAL;
4204                 return (NULL);
4205         }
4206         SCTP_INP_RLOCK(inp);
4207         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4208             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4209             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4210                 /*
4211                  * If its in the TCP pool, its NOT allowed to create an
4212                  * association. The parent listener needs to call
4213                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4214                  * off, or connected one does this.. its an error.
4215                  */
4216                 SCTP_INP_RUNLOCK(inp);
4217                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4218                 *error = EINVAL;
4219                 return (NULL);
4220         }
4221         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4222             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4223                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4224                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4225                         SCTP_INP_RUNLOCK(inp);
4226                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4227                         *error = EINVAL;
4228                         return (NULL);
4229                 }
4230         }
4231         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4232 #ifdef SCTP_DEBUG
4233         if (firstaddr) {
4234                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4235                 switch (firstaddr->sa_family) {
4236 #ifdef INET
4237                 case AF_INET:
4238                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4239                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4240                         break;
4241 #endif
4242 #ifdef INET6
4243                 case AF_INET6:
4244                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4245                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4246                         break;
4247 #endif
4248                 default:
4249                         break;
4250                 }
4251         } else {
4252                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4253         }
4254 #endif                          /* SCTP_DEBUG */
4255         switch (firstaddr->sa_family) {
4256 #ifdef INET
4257         case AF_INET:
4258                 {
4259                         struct sockaddr_in *sin;
4260
4261                         sin = (struct sockaddr_in *)firstaddr;
4262                         if ((ntohs(sin->sin_port) == 0) ||
4263                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4264                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4265                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4266                                 /* Invalid address */
4267                                 SCTP_INP_RUNLOCK(inp);
4268                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4269                                 *error = EINVAL;
4270                                 return (NULL);
4271                         }
4272                         rport = sin->sin_port;
4273                         break;
4274                 }
4275 #endif
4276 #ifdef INET6
4277         case AF_INET6:
4278                 {
4279                         struct sockaddr_in6 *sin6;
4280
4281                         sin6 = (struct sockaddr_in6 *)firstaddr;
4282                         if ((ntohs(sin6->sin6_port) == 0) ||
4283                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4284                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4285                                 /* Invalid address */
4286                                 SCTP_INP_RUNLOCK(inp);
4287                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4288                                 *error = EINVAL;
4289                                 return (NULL);
4290                         }
4291                         rport = sin6->sin6_port;
4292                         break;
4293                 }
4294 #endif
4295         default:
4296                 /* not supported family type */
4297                 SCTP_INP_RUNLOCK(inp);
4298                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4299                 *error = EINVAL;
4300                 return (NULL);
4301         }
4302         SCTP_INP_RUNLOCK(inp);
4303         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4304                 /*
4305                  * If you have not performed a bind, then we need to do the
4306                  * ephemeral bind for you.
4307                  */
4308                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4309                     (struct sockaddr *)NULL,
4310                     (struct sctp_ifa *)NULL,
4311                     p
4312                     ))) {
4313                         /* bind error, probably perm */
4314                         *error = err;
4315                         return (NULL);
4316                 }
4317         }
4318         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4319         if (stcb == NULL) {
4320                 /* out of memory? */
4321                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4322                 *error = ENOMEM;
4323                 return (NULL);
4324         }
4325         SCTP_INCR_ASOC_COUNT();
4326
4327         bzero(stcb, sizeof(*stcb));
4328         asoc = &stcb->asoc;
4329
4330         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4331         SCTP_TCB_LOCK_INIT(stcb);
4332         SCTP_TCB_SEND_LOCK_INIT(stcb);
4333         stcb->rport = rport;
4334         /* setup back pointer's */
4335         stcb->sctp_ep = inp;
4336         stcb->sctp_socket = inp->sctp_socket;
4337         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4338                 /* failed */
4339                 SCTP_TCB_LOCK_DESTROY(stcb);
4340                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4341                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4342                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4343                 SCTP_DECR_ASOC_COUNT();
4344                 *error = err;
4345                 return (NULL);
4346         }
4347         /* and the port */
4348         SCTP_INP_INFO_WLOCK();
4349         SCTP_INP_WLOCK(inp);
4350         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4351                 /* inpcb freed while alloc going on */
4352                 SCTP_TCB_LOCK_DESTROY(stcb);
4353                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4354                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4355                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4356                 SCTP_INP_WUNLOCK(inp);
4357                 SCTP_INP_INFO_WUNLOCK();
4358                 SCTP_DECR_ASOC_COUNT();
4359                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4360                 *error = EINVAL;
4361                 return (NULL);
4362         }
4363         SCTP_TCB_LOCK(stcb);
4364
4365         /* now that my_vtag is set, add it to the hash */
4366         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4367         /* put it in the bucket in the vtag hash of assoc's for the system */
4368         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4369         SCTP_INP_INFO_WUNLOCK();
4370
4371         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4372                 /* failure.. memory error? */
4373                 if (asoc->strmout) {
4374                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4375                         asoc->strmout = NULL;
4376                 }
4377                 if (asoc->mapping_array) {
4378                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4379                         asoc->mapping_array = NULL;
4380                 }
4381                 if (asoc->nr_mapping_array) {
4382                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4383                         asoc->nr_mapping_array = NULL;
4384                 }
4385                 SCTP_DECR_ASOC_COUNT();
4386                 SCTP_TCB_UNLOCK(stcb);
4387                 SCTP_TCB_LOCK_DESTROY(stcb);
4388                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4389                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4390                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4391                 SCTP_INP_WUNLOCK(inp);
4392                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4393                 *error = ENOBUFS;
4394                 return (NULL);
4395         }
4396         /* Init all the timers */
4397         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4398         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4399         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4400         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4401         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4402         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4403         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4404
4405         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4406         /* now file the port under the hash as well */
4407         if (inp->sctp_tcbhash != NULL) {
4408                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4409                     inp->sctp_hashmark)];
4410                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4411         }
4412         SCTP_INP_WUNLOCK(inp);
4413         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4414         return (stcb);
4415 }
4416
4417
4418 void
4419 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4420 {
4421         struct sctp_association *asoc;
4422
4423         asoc = &stcb->asoc;
4424         asoc->numnets--;
4425         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4426         if (net == asoc->primary_destination) {
4427                 /* Reset primary */
4428                 struct sctp_nets *lnet;
4429
4430                 lnet = TAILQ_FIRST(&asoc->nets);
4431                 /*
4432                  * Mobility adaptation Ideally, if deleted destination is
4433                  * the primary, it becomes a fast retransmission trigger by
4434                  * the subsequent SET PRIMARY. (by micchie)
4435                  */
4436                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4437                     SCTP_MOBILITY_BASE) ||
4438                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4439                     SCTP_MOBILITY_FASTHANDOFF)) {
4440                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4441                         if (asoc->deleted_primary != NULL) {
4442                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4443                                 goto out;
4444                         }
4445                         asoc->deleted_primary = net;
4446                         atomic_add_int(&net->ref_count, 1);
4447                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4448                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4449                         sctp_mobility_feature_on(stcb->sctp_ep,
4450                             SCTP_MOBILITY_PRIM_DELETED);
4451                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4452                             stcb->sctp_ep, stcb, NULL);
4453                 }
4454 out:
4455                 /* Try to find a confirmed primary */
4456                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4457         }
4458         if (net == asoc->last_data_chunk_from) {
4459                 /* Reset primary */
4460                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4461         }
4462         if (net == asoc->last_control_chunk_from) {
4463                 /* Clear net */
4464                 asoc->last_control_chunk_from = NULL;
4465         }
4466         if (net == stcb->asoc.alternate) {
4467                 sctp_free_remote_addr(stcb->asoc.alternate);
4468                 stcb->asoc.alternate = NULL;
4469         }
4470         sctp_free_remote_addr(net);
4471 }
4472
4473 /*
4474  * remove a remote endpoint address from an association, it will fail if the
4475  * address does not exist.
4476  */
4477 int
4478 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4479 {
4480         /*
4481          * Here we need to remove a remote address. This is quite simple, we
4482          * first find it in the list of address for the association
4483          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4484          * on that item. Note we do not allow it to be removed if there are
4485          * no other addresses.
4486          */
4487         struct sctp_association *asoc;
4488         struct sctp_nets *net, *nnet;
4489
4490         asoc = &stcb->asoc;
4491
4492         /* locate the address */
4493         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4494                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4495                         continue;
4496                 }
4497                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4498                     remaddr)) {
4499                         /* we found the guy */
4500                         if (asoc->numnets < 2) {
4501                                 /* Must have at LEAST two remote addresses */
4502                                 return (-1);
4503                         } else {
4504                                 sctp_remove_net(stcb, net);
4505                                 return (0);
4506                         }
4507                 }
4508         }
4509         /* not found. */
4510         return (-2);
4511 }
4512
4513 void
4514 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4515 {
4516         struct sctpvtaghead *chain;
4517         struct sctp_tagblock *twait_block;
4518         int found = 0;
4519         int i;
4520
4521         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4522         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4523                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4524                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4525                             (twait_block->vtag_block[i].lport == lport) &&
4526                             (twait_block->vtag_block[i].rport == rport)) {
4527                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4528                                 twait_block->vtag_block[i].v_tag = 0;
4529                                 twait_block->vtag_block[i].lport = 0;
4530                                 twait_block->vtag_block[i].rport = 0;
4531                                 found = 1;
4532                                 break;
4533                         }
4534                 }
4535                 if (found)
4536                         break;
4537         }
4538 }
4539
4540 int
4541 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4542 {
4543         struct sctpvtaghead *chain;
4544         struct sctp_tagblock *twait_block;
4545         int found = 0;
4546         int i;
4547
4548         SCTP_INP_INFO_WLOCK();
4549         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4550         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4551                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4552                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4553                             (twait_block->vtag_block[i].lport == lport) &&
4554                             (twait_block->vtag_block[i].rport == rport)) {
4555                                 found = 1;
4556                                 break;
4557                         }
4558                 }
4559                 if (found)
4560                         break;
4561         }
4562         SCTP_INP_INFO_WUNLOCK();
4563         return (found);
4564 }
4565
4566
4567 void
4568 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4569 {
4570         struct sctpvtaghead *chain;
4571         struct sctp_tagblock *twait_block;
4572         struct timeval now;
4573         int set, i;
4574
4575         if (time == 0) {
4576                 /* Its disabled */
4577                 return;
4578         }
4579         (void)SCTP_GETTIME_TIMEVAL(&now);
4580         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4581         set = 0;
4582         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4583                 /* Block(s) present, lets find space, and expire on the fly */
4584                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4585                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4586                             !set) {
4587                                 twait_block->vtag_block[i].tv_sec_at_expire =
4588                                     now.tv_sec + time;
4589                                 twait_block->vtag_block[i].v_tag = tag;
4590                                 twait_block->vtag_block[i].lport = lport;
4591                                 twait_block->vtag_block[i].rport = rport;
4592                                 set = 1;
4593                         } else if ((twait_block->vtag_block[i].v_tag) &&
4594                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4595                                 /* Audit expires this guy */
4596                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4597                                 twait_block->vtag_block[i].v_tag = 0;
4598                                 twait_block->vtag_block[i].lport = 0;
4599                                 twait_block->vtag_block[i].rport = 0;
4600                                 if (set == 0) {
4601                                         /* Reuse it for my new tag */
4602                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4603                                         twait_block->vtag_block[i].v_tag = tag;
4604                                         twait_block->vtag_block[i].lport = lport;
4605                                         twait_block->vtag_block[i].rport = rport;
4606                                         set = 1;
4607                                 }
4608                         }
4609                 }
4610                 if (set) {
4611                         /*
4612                          * We only do up to the block where we can place our
4613                          * tag for audits
4614                          */
4615                         break;
4616                 }
4617         }
4618         /* Need to add a new block to chain */
4619         if (!set) {
4620                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4621                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4622                 if (twait_block == NULL) {
4623 #ifdef INVARIANTS
4624                         panic("Can not alloc tagblock");
4625 #endif
4626                         return;
4627                 }
4628                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4629                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4630                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4631                 twait_block->vtag_block[0].v_tag = tag;
4632                 twait_block->vtag_block[0].lport = lport;
4633                 twait_block->vtag_block[0].rport = rport;
4634         }
4635 }
4636
4637
4638
4639 /*-
4640  * Free the association after un-hashing the remote port. This
4641  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4642  * expect that the input to this function IS a locked TCB.
4643  * It will return 0, if it did NOT destroy the association (instead
4644  * it unlocks it. It will return NON-zero if it either destroyed the
4645  * association OR the association is already destroyed.
4646  */
4647 int
4648 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4649 {
4650         int i;
4651         struct sctp_association *asoc;
4652         struct sctp_nets *net, *nnet;
4653         struct sctp_laddr *laddr, *naddr;
4654         struct sctp_tmit_chunk *chk, *nchk;
4655         struct sctp_asconf_addr *aparam, *naparam;
4656         struct sctp_asconf_ack *aack, *naack;
4657         struct sctp_stream_reset_list *strrst, *nstrrst;
4658         struct sctp_queued_to_read *sq, *nsq;
4659         struct sctp_stream_queue_pending *sp, *nsp;
4660         sctp_sharedkey_t *shared_key, *nshared_key;
4661         struct socket *so;
4662
4663         /* first, lets purge the entry from the hash table. */
4664
4665 #ifdef SCTP_LOG_CLOSING
4666         sctp_log_closing(inp, stcb, 6);
4667 #endif
4668         if (stcb->asoc.state == 0) {
4669 #ifdef SCTP_LOG_CLOSING
4670                 sctp_log_closing(inp, NULL, 7);
4671 #endif
4672                 /* there is no asoc, really TSNH :-0 */
4673                 return (1);
4674         }
4675         if (stcb->asoc.alternate) {
4676                 sctp_free_remote_addr(stcb->asoc.alternate);
4677                 stcb->asoc.alternate = NULL;
4678         }
4679         /* TEMP CODE */
4680         if (stcb->freed_from_where == 0) {
4681                 /* Only record the first place free happened from */
4682                 stcb->freed_from_where = from_location;
4683         }
4684         /* TEMP CODE */
4685
4686         asoc = &stcb->asoc;
4687         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4688             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4689                 /* nothing around */
4690                 so = NULL;
4691         else
4692                 so = inp->sctp_socket;
4693
4694         /*
4695          * We used timer based freeing if a reader or writer is in the way.
4696          * So we first check if we are actually being called from a timer,
4697          * if so we abort early if a reader or writer is still in the way.
4698          */
4699         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4700             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4701                 /*
4702                  * is it the timer driving us? if so are the reader/writers
4703                  * gone?
4704                  */
4705                 if (stcb->asoc.refcnt) {
4706                         /* nope, reader or writer in the way */
4707                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4708                         /* no asoc destroyed */
4709                         SCTP_TCB_UNLOCK(stcb);
4710 #ifdef SCTP_LOG_CLOSING
4711                         sctp_log_closing(inp, stcb, 8);
4712 #endif
4713                         return (0);
4714                 }
4715         }
4716         /* now clean up any other timers */
4717         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4718         asoc->dack_timer.self = NULL;
4719         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4720         /*-
4721          * For stream reset we don't blast this unless
4722          * it is a str-reset timer, it might be the
4723          * free-asoc timer which we DON'T want to
4724          * disturb.
4725          */
4726         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4727                 asoc->strreset_timer.self = NULL;
4728         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4729         asoc->asconf_timer.self = NULL;
4730         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4731         asoc->autoclose_timer.self = NULL;
4732         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4733         asoc->shut_guard_timer.self = NULL;
4734         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4735         asoc->delayed_event_timer.self = NULL;
4736         /* Mobility adaptation */
4737         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4738         asoc->delete_prim_timer.self = NULL;
4739         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4740                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4741                 net->rxt_timer.self = NULL;
4742                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4743                 net->pmtu_timer.self = NULL;
4744                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4745                 net->hb_timer.self = NULL;
4746         }
4747         /* Now the read queue needs to be cleaned up (only once) */
4748         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4749                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4750                 SCTP_INP_READ_LOCK(inp);
4751                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4752                         if (sq->stcb == stcb) {
4753                                 sq->do_not_ref_stcb = 1;
4754                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4755                                 /*
4756                                  * If there is no end, there never will be
4757                                  * now.
4758                                  */
4759                                 if (sq->end_added == 0) {
4760                                         /* Held for PD-API clear that. */
4761                                         sq->pdapi_aborted = 1;
4762                                         sq->held_length = 0;
4763                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4764                                                 /*
4765                                                  * Need to add a PD-API
4766                                                  * aborted indication.
4767                                                  * Setting the control_pdapi
4768                                                  * assures that it will be
4769                                                  * added right after this
4770                                                  * msg.
4771                                                  */
4772                                                 uint32_t strseq;
4773
4774                                                 stcb->asoc.control_pdapi = sq;
4775                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4776                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4777                                                     stcb,
4778                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4779                                                     (void *)&strseq,
4780                                                     SCTP_SO_LOCKED);
4781                                                 stcb->asoc.control_pdapi = NULL;
4782                                         }
4783                                 }
4784                                 /* Add an end to wake them */
4785                                 sq->end_added = 1;
4786                         }
4787                 }
4788                 SCTP_INP_READ_UNLOCK(inp);
4789                 if (stcb->block_entry) {
4790                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4791                         stcb->block_entry->error = ECONNRESET;
4792                         stcb->block_entry = NULL;
4793                 }
4794         }
4795         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4796                 /*
4797                  * Someone holds a reference OR the socket is unaccepted
4798                  * yet.
4799                  */
4800                 if ((stcb->asoc.refcnt) ||
4801                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4802                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4803                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4804                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4805                 }
4806                 SCTP_TCB_UNLOCK(stcb);
4807                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4808                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4809                         /* nothing around */
4810                         so = NULL;
4811                 if (so) {
4812                         /* Wake any reader/writers */
4813                         sctp_sorwakeup(inp, so);
4814                         sctp_sowwakeup(inp, so);
4815                 }
4816 #ifdef SCTP_LOG_CLOSING
4817                 sctp_log_closing(inp, stcb, 9);
4818 #endif
4819                 /* no asoc destroyed */
4820                 return (0);
4821         }
4822 #ifdef SCTP_LOG_CLOSING
4823         sctp_log_closing(inp, stcb, 10);
4824 #endif
4825         /*
4826          * When I reach here, no others want to kill the assoc yet.. and I
4827          * own the lock. Now its possible an abort comes in when I do the
4828          * lock exchange below to grab all the locks to do the final take
4829          * out. to prevent this we increment the count, which will start a
4830          * timer and blow out above thus assuring us that we hold exclusive
4831          * killing of the asoc. Note that after getting back the TCB lock we
4832          * will go ahead and increment the counter back up and stop any
4833          * timer a passing stranger may have started :-S
4834          */
4835         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4836                 atomic_add_int(&stcb->asoc.refcnt, 1);
4837
4838                 SCTP_TCB_UNLOCK(stcb);
4839                 SCTP_INP_INFO_WLOCK();
4840                 SCTP_INP_WLOCK(inp);
4841                 SCTP_TCB_LOCK(stcb);
4842         }
4843         /* Double check the GONE flag */
4844         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4845             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4846                 /* nothing around */
4847                 so = NULL;
4848
4849         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4850             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4851                 /*
4852                  * For TCP type we need special handling when we are
4853                  * connected. We also include the peel'ed off ones to.
4854                  */
4855                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4856                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4857                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4858                         if (so) {
4859                                 SOCK_LOCK(so);
4860                                 if (so->so_rcv.sb_cc == 0) {
4861                                         so->so_state &= ~(SS_ISCONNECTING |
4862                                             SS_ISDISCONNECTING |
4863                                             SS_ISCONFIRMING |
4864                                             SS_ISCONNECTED);
4865                                 }
4866                                 socantrcvmore_locked(so);
4867                                 sctp_sowwakeup(inp, so);
4868                                 sctp_sorwakeup(inp, so);
4869                                 SCTP_SOWAKEUP(so);
4870                         }
4871                 }
4872         }
4873         /*
4874          * Make it invalid too, that way if its about to run it will abort
4875          * and return.
4876          */
4877         /* re-increment the lock */
4878         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4879                 atomic_add_int(&stcb->asoc.refcnt, -1);
4880         }
4881         if (stcb->asoc.refcnt) {
4882                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4883                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4884                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4885                         SCTP_INP_INFO_WUNLOCK();
4886                         SCTP_INP_WUNLOCK(inp);
4887                 }
4888                 SCTP_TCB_UNLOCK(stcb);
4889                 return (0);
4890         }
4891         asoc->state = 0;
4892         if (inp->sctp_tcbhash) {
4893                 LIST_REMOVE(stcb, sctp_tcbhash);
4894         }
4895         if (stcb->asoc.in_asocid_hash) {
4896                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4897         }
4898         /* Now lets remove it from the list of ALL associations in the EP */
4899         LIST_REMOVE(stcb, sctp_tcblist);
4900         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4901                 SCTP_INP_INCR_REF(inp);
4902                 SCTP_INP_WUNLOCK(inp);
4903         }
4904         /* pull from vtag hash */
4905         LIST_REMOVE(stcb, sctp_asocs);
4906         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4907             inp->sctp_lport, stcb->rport);
4908
4909         /*
4910          * Now restop the timers to be sure this is paranoia at is finest!
4911          */
4912         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4913         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4914         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4915         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4916         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4917         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4918         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4919         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4920                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4921                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4922                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4923         }
4924
4925         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4926         /*
4927          * The chunk lists and such SHOULD be empty but we check them just
4928          * in case.
4929          */
4930         /* anything on the wheel needs to be removed */
4931         for (i = 0; i < asoc->streamoutcnt; i++) {
4932                 struct sctp_stream_out *outs;
4933
4934                 outs = &asoc->strmout[i];
4935                 /* now clean up any chunks here */
4936                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4937                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4938                         sctp_free_spbufspace(stcb, asoc, sp);
4939                         if (sp->data) {
4940                                 if (so) {
4941                                         /* Still an open socket - report */
4942                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4943                                             0, (void *)sp, SCTP_SO_LOCKED);
4944                                 }
4945                                 if (sp->data) {
4946                                         sctp_m_freem(sp->data);
4947                                         sp->data = NULL;
4948                                         sp->tail_mbuf = NULL;
4949                                         sp->length = 0;
4950                                 }
4951                         }
4952                         if (sp->net) {
4953                                 sctp_free_remote_addr(sp->net);
4954                                 sp->net = NULL;
4955                         }
4956                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4957                 }
4958         }
4959         /* sa_ignore FREED_MEMORY */
4960         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4961                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4962                 SCTP_FREE(strrst, SCTP_M_STRESET);
4963         }
4964         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4965                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4966                 if (sq->data) {
4967                         sctp_m_freem(sq->data);
4968                         sq->data = NULL;
4969                 }
4970                 sctp_free_remote_addr(sq->whoFrom);
4971                 sq->whoFrom = NULL;
4972                 sq->stcb = NULL;
4973                 /* Free the ctl entry */
4974                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4975                 SCTP_DECR_READQ_COUNT();
4976                 /* sa_ignore FREED_MEMORY */
4977         }
4978         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4979                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4980                 if (chk->data) {
4981                         sctp_m_freem(chk->data);
4982                         chk->data = NULL;
4983                 }
4984                 if (chk->holds_key_ref)
4985                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4986                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4987                 SCTP_DECR_CHK_COUNT();
4988                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4989                 asoc->free_chunk_cnt--;
4990                 /* sa_ignore FREED_MEMORY */
4991         }
4992         /* pending send queue SHOULD be empty */
4993         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4994                 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
4995                         asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
4996 #ifdef INVARIANTS
4997                 } else {
4998                         panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
4999 #endif
5000                 }
5001                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5002                 if (chk->data) {
5003                         if (so) {
5004                                 /* Still a socket? */
5005                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5006                                     0, chk, SCTP_SO_LOCKED);
5007                         }
5008                         if (chk->data) {
5009                                 sctp_m_freem(chk->data);
5010                                 chk->data = NULL;
5011                         }
5012                 }
5013                 if (chk->holds_key_ref)
5014                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5015                 if (chk->whoTo) {
5016                         sctp_free_remote_addr(chk->whoTo);
5017                         chk->whoTo = NULL;
5018                 }
5019                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5020                 SCTP_DECR_CHK_COUNT();
5021                 /* sa_ignore FREED_MEMORY */
5022         }
5023         /* sent queue SHOULD be empty */
5024         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5025                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5026                         if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
5027                                 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
5028 #ifdef INVARIANTS
5029                         } else {
5030                                 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
5031 #endif
5032                         }
5033                 }
5034                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5035                 if (chk->data) {
5036                         if (so) {
5037                                 /* Still a socket? */
5038                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5039                                     0, chk, SCTP_SO_LOCKED);
5040                         }
5041                         if (chk->data) {
5042                                 sctp_m_freem(chk->data);
5043                                 chk->data = NULL;
5044                         }
5045                 }
5046                 if (chk->holds_key_ref)
5047                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5048                 sctp_free_remote_addr(chk->whoTo);
5049                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5050                 SCTP_DECR_CHK_COUNT();
5051                 /* sa_ignore FREED_MEMORY */
5052         }
5053 #ifdef INVARIANTS
5054         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5055                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5056                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5057                 }
5058         }
5059 #endif
5060         /* control queue MAY not be empty */
5061         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5062                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5063                 if (chk->data) {
5064                         sctp_m_freem(chk->data);
5065                         chk->data = NULL;
5066                 }
5067                 if (chk->holds_key_ref)
5068                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5069                 sctp_free_remote_addr(chk->whoTo);
5070                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5071                 SCTP_DECR_CHK_COUNT();
5072                 /* sa_ignore FREED_MEMORY */
5073         }
5074         /* ASCONF queue MAY not be empty */
5075         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5076                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5077                 if (chk->data) {
5078                         sctp_m_freem(chk->data);
5079                         chk->data = NULL;
5080                 }
5081                 if (chk->holds_key_ref)
5082                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5083                 sctp_free_remote_addr(chk->whoTo);
5084                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5085                 SCTP_DECR_CHK_COUNT();
5086                 /* sa_ignore FREED_MEMORY */
5087         }
5088         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5089                 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5090                 if (chk->data) {
5091                         sctp_m_freem(chk->data);
5092                         chk->data = NULL;
5093                 }
5094                 if (chk->holds_key_ref)
5095                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5096                 sctp_free_remote_addr(chk->whoTo);
5097                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5098                 SCTP_DECR_CHK_COUNT();
5099                 /* sa_ignore FREED_MEMORY */
5100         }
5101
5102         if (asoc->mapping_array) {
5103                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5104                 asoc->mapping_array = NULL;
5105         }
5106         if (asoc->nr_mapping_array) {
5107                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5108                 asoc->nr_mapping_array = NULL;
5109         }
5110         /* the stream outs */
5111         if (asoc->strmout) {
5112                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5113                 asoc->strmout = NULL;
5114         }
5115         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5116         if (asoc->strmin) {
5117                 struct sctp_queued_to_read *ctl, *nctl;
5118
5119                 for (i = 0; i < asoc->streamincnt; i++) {
5120                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5121                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5122                                 sctp_free_remote_addr(ctl->whoFrom);
5123                                 if (ctl->data) {
5124                                         sctp_m_freem(ctl->data);
5125                                         ctl->data = NULL;
5126                                 }
5127                                 /*
5128                                  * We don't free the address here since all
5129                                  * the net's were freed above.
5130                                  */
5131                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5132                                 SCTP_DECR_READQ_COUNT();
5133                         }
5134                 }
5135                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5136                 asoc->strmin = NULL;
5137         }
5138         asoc->streamincnt = 0;
5139         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5140 #ifdef INVARIANTS
5141                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5142                         panic("no net's left alloc'ed, or list points to itself");
5143                 }
5144 #endif
5145                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5146                 sctp_free_remote_addr(net);
5147         }
5148         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5149                 /* sa_ignore FREED_MEMORY */
5150                 sctp_remove_laddr(laddr);
5151         }
5152
5153         /* pending asconf (address) parameters */
5154         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5155                 /* sa_ignore FREED_MEMORY */
5156                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5157                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5158         }
5159         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5160                 /* sa_ignore FREED_MEMORY */
5161                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5162                 if (aack->data != NULL) {
5163                         sctp_m_freem(aack->data);
5164                 }
5165                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5166         }
5167         /* clean up auth stuff */
5168         if (asoc->local_hmacs)
5169                 sctp_free_hmaclist(asoc->local_hmacs);
5170         if (asoc->peer_hmacs)
5171                 sctp_free_hmaclist(asoc->peer_hmacs);
5172
5173         if (asoc->local_auth_chunks)
5174                 sctp_free_chunklist(asoc->local_auth_chunks);
5175         if (asoc->peer_auth_chunks)
5176                 sctp_free_chunklist(asoc->peer_auth_chunks);
5177
5178         sctp_free_authinfo(&asoc->authinfo);
5179
5180         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5181                 LIST_REMOVE(shared_key, next);
5182                 sctp_free_sharedkey(shared_key);
5183                 /* sa_ignore FREED_MEMORY */
5184         }
5185
5186         /* Insert new items here :> */
5187
5188         /* Get rid of LOCK */
5189         SCTP_TCB_UNLOCK(stcb);
5190         SCTP_TCB_LOCK_DESTROY(stcb);
5191         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5192         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5193                 SCTP_INP_INFO_WUNLOCK();
5194                 SCTP_INP_RLOCK(inp);
5195         }
5196 #ifdef SCTP_TRACK_FREED_ASOCS
5197         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5198                 /* now clean up the tasoc itself */
5199                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5200                 SCTP_DECR_ASOC_COUNT();
5201         } else {
5202                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5203         }
5204 #else
5205         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5206         SCTP_DECR_ASOC_COUNT();
5207 #endif
5208         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5209                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5210                         /*
5211                          * If its NOT the inp_free calling us AND sctp_close
5212                          * as been called, we call back...
5213                          */
5214                         SCTP_INP_RUNLOCK(inp);
5215                         /*
5216                          * This will start the kill timer (if we are the
5217                          * last one) since we hold an increment yet. But
5218                          * this is the only safe way to do this since
5219                          * otherwise if the socket closes at the same time
5220                          * we are here we might collide in the cleanup.
5221                          */
5222                         sctp_inpcb_free(inp,
5223                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5224                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5225                         SCTP_INP_DECR_REF(inp);
5226                         goto out_of;
5227                 } else {
5228                         /* The socket is still open. */
5229                         SCTP_INP_DECR_REF(inp);
5230                 }
5231         }
5232         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5233                 SCTP_INP_RUNLOCK(inp);
5234         }
5235 out_of:
5236         /* destroyed the asoc */
5237 #ifdef SCTP_LOG_CLOSING
5238         sctp_log_closing(inp, NULL, 11);
5239 #endif
5240         return (1);
5241 }
5242
5243
5244
5245 /*
5246  * determine if a destination is "reachable" based upon the addresses bound
5247  * to the current endpoint (e.g. only v4 or v6 currently bound)
5248  */
5249 /*
5250  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5251  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5252  * types bound as its endpoint
5253  */
5254 int
5255 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5256 {
5257         struct sctp_inpcb *inp;
5258         int answer;
5259
5260         /*
5261          * No locks here, the TCB, in all cases is already locked and an
5262          * assoc is up. There is either a INP lock by the caller applied (in
5263          * asconf case when deleting an address) or NOT in the HB case,
5264          * however if HB then the INP increment is up and the INP will not
5265          * be removed (on top of the fact that we have a TCB lock). So we
5266          * only want to read the sctp_flags, which is either bound-all or
5267          * not.. no protection needed since once an assoc is up you can't be
5268          * changing your binding.
5269          */
5270         inp = stcb->sctp_ep;
5271         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5272                 /* if bound all, destination is not restricted */
5273                 /*
5274                  * RRS: Question during lock work: Is this correct? If you
5275                  * are bound-all you still might need to obey the V4--V6
5276                  * flags??? IMO this bound-all stuff needs to be removed!
5277                  */
5278                 return (1);
5279         }
5280         /* NOTE: all "scope" checks are done when local addresses are added */
5281         switch (destaddr->sa_family) {
5282 #ifdef INET6
5283         case AF_INET6:
5284                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5285                 break;
5286 #endif
5287 #ifdef INET
5288         case AF_INET:
5289                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5290                 break;
5291 #endif
5292         default:
5293                 /* invalid family, so it's unreachable */
5294                 answer = 0;
5295                 break;
5296         }
5297         return (answer);
5298 }
5299
5300 /*
5301  * update the inp_vflags on an endpoint
5302  */
5303 static void
5304 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5305 {
5306         struct sctp_laddr *laddr;
5307
5308         /* first clear the flag */
5309         inp->ip_inp.inp.inp_vflag = 0;
5310         /* set the flag based on addresses on the ep list */
5311         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5312                 if (laddr->ifa == NULL) {
5313                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5314                             __FUNCTION__);
5315                         continue;
5316                 }
5317                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5318                         continue;
5319                 }
5320                 switch (laddr->ifa->address.sa.sa_family) {
5321 #ifdef INET6
5322                 case AF_INET6:
5323                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5324                         break;
5325 #endif
5326 #ifdef INET
5327                 case AF_INET:
5328                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5329                         break;
5330 #endif
5331                 default:
5332                         break;
5333                 }
5334         }
5335 }
5336
5337 /*
5338  * Add the address to the endpoint local address list There is nothing to be
5339  * done if we are bound to all addresses
5340  */
5341 void
5342 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5343 {
5344         struct sctp_laddr *laddr;
5345         int fnd, error = 0;
5346
5347         fnd = 0;
5348
5349         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5350                 /* You are already bound to all. You have it already */
5351                 return;
5352         }
5353 #ifdef INET6
5354         if (ifa->address.sa.sa_family == AF_INET6) {
5355                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5356                         /* Can't bind a non-useable addr. */
5357                         return;
5358                 }
5359         }
5360 #endif
5361         /* first, is it already present? */
5362         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5363                 if (laddr->ifa == ifa) {
5364                         fnd = 1;
5365                         break;
5366                 }
5367         }
5368
5369         if (fnd == 0) {
5370                 /* Not in the ep list */
5371                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5372                 if (error != 0)
5373                         return;
5374                 inp->laddr_count++;
5375                 /* update inp_vflag flags */
5376                 switch (ifa->address.sa.sa_family) {
5377 #ifdef INET6
5378                 case AF_INET6:
5379                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5380                         break;
5381 #endif
5382 #ifdef INET
5383                 case AF_INET:
5384                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5385                         break;
5386 #endif
5387                 default:
5388                         break;
5389                 }
5390         }
5391         return;
5392 }
5393
5394
5395 /*
5396  * select a new (hopefully reachable) destination net (should only be used
5397  * when we deleted an ep addr that is the only usable source address to reach
5398  * the destination net)
5399  */
5400 static void
5401 sctp_select_primary_destination(struct sctp_tcb *stcb)
5402 {
5403         struct sctp_nets *net;
5404
5405         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5406                 /* for now, we'll just pick the first reachable one we find */
5407                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5408                         continue;
5409                 if (sctp_destination_is_reachable(stcb,
5410                     (struct sockaddr *)&net->ro._l_addr)) {
5411                         /* found a reachable destination */
5412                         stcb->asoc.primary_destination = net;
5413                 }
5414         }
5415         /* I can't there from here! ...we're gonna die shortly... */
5416 }
5417
5418
5419 /*
5420  * Delete the address from the endpoint local address list There is nothing
5421  * to be done if we are bound to all addresses
5422  */
5423 void
5424 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5425 {
5426         struct sctp_laddr *laddr;
5427         int fnd;
5428
5429         fnd = 0;
5430         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5431                 /* You are already bound to all. You have it already */
5432                 return;
5433         }
5434         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5435                 if (laddr->ifa == ifa) {
5436                         fnd = 1;
5437                         break;
5438                 }
5439         }
5440         if (fnd && (inp->laddr_count < 2)) {
5441                 /* can't delete unless there are at LEAST 2 addresses */
5442                 return;
5443         }
5444         if (fnd) {
5445                 /*
5446                  * clean up any use of this address go through our
5447                  * associations and clear any last_used_address that match
5448                  * this one for each assoc, see if a new primary_destination
5449                  * is needed
5450                  */
5451                 struct sctp_tcb *stcb;
5452
5453                 /* clean up "next_addr_touse" */
5454                 if (inp->next_addr_touse == laddr)
5455                         /* delete this address */
5456                         inp->next_addr_touse = NULL;
5457
5458                 /* clean up "last_used_address" */
5459                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5460                         struct sctp_nets *net;
5461
5462                         SCTP_TCB_LOCK(stcb);
5463                         if (stcb->asoc.last_used_address == laddr)
5464                                 /* delete this address */
5465                                 stcb->asoc.last_used_address = NULL;
5466                         /*
5467                          * Now spin through all the nets and purge any ref
5468                          * to laddr
5469                          */
5470                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5471                                 if (net->ro._s_addr &&
5472                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5473                                         /* Yep, purge src address selected */
5474                                         sctp_rtentry_t *rt;
5475
5476                                         /* delete this address if cached */
5477                                         rt = net->ro.ro_rt;
5478                                         if (rt != NULL) {
5479                                                 RTFREE(rt);
5480                                                 net->ro.ro_rt = NULL;
5481                                         }
5482                                         sctp_free_ifa(net->ro._s_addr);
5483                                         net->ro._s_addr = NULL;
5484                                         net->src_addr_selected = 0;
5485                                 }
5486                         }
5487                         SCTP_TCB_UNLOCK(stcb);
5488                 }               /* for each tcb */
5489                 /* remove it from the ep list */
5490                 sctp_remove_laddr(laddr);
5491                 inp->laddr_count--;
5492                 /* update inp_vflag flags */
5493                 sctp_update_ep_vflag(inp);
5494         }
5495         return;
5496 }
5497
5498 /*
5499  * Add the address to the TCB local address restricted list.
5500  * This is a "pending" address list (eg. addresses waiting for an
5501  * ASCONF-ACK response) and cannot be used as a valid source address.
5502  */
5503 void
5504 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5505 {
5506         struct sctp_laddr *laddr;
5507         struct sctpladdr *list;
5508
5509         /*
5510          * Assumes TCB is locked.. and possibly the INP. May need to
5511          * confirm/fix that if we need it and is not the case.
5512          */
5513         list = &stcb->asoc.sctp_restricted_addrs;
5514
5515 #ifdef INET6
5516         if (ifa->address.sa.sa_family == AF_INET6) {
5517                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5518                         /* Can't bind a non-existent addr. */
5519                         return;
5520                 }
5521         }
5522 #endif
5523         /* does the address already exist? */
5524         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5525                 if (laddr->ifa == ifa) {
5526                         return;
5527                 }
5528         }
5529
5530         /* add to the list */
5531         (void)sctp_insert_laddr(list, ifa, 0);
5532         return;
5533 }
5534
5535 /*
5536  * insert an laddr entry with the given ifa for the desired list
5537  */
5538 int
5539 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5540 {
5541         struct sctp_laddr *laddr;
5542
5543         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5544         if (laddr == NULL) {
5545                 /* out of memory? */
5546                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5547                 return (EINVAL);
5548         }
5549         SCTP_INCR_LADDR_COUNT();
5550         bzero(laddr, sizeof(*laddr));
5551         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5552         laddr->ifa = ifa;
5553         laddr->action = act;
5554         atomic_add_int(&ifa->refcount, 1);
5555         /* insert it */
5556         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5557
5558         return (0);
5559 }
5560
5561 /*
5562  * Remove an laddr entry from the local address list (on an assoc)
5563  */
5564 void
5565 sctp_remove_laddr(struct sctp_laddr *laddr)
5566 {
5567
5568         /* remove from the list */
5569         LIST_REMOVE(laddr, sctp_nxt_addr);
5570         sctp_free_ifa(laddr->ifa);
5571         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5572         SCTP_DECR_LADDR_COUNT();
5573 }
5574
5575 /*
5576  * Remove a local address from the TCB local address restricted list
5577  */
5578 void
5579 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5580 {
5581         struct sctp_inpcb *inp;
5582         struct sctp_laddr *laddr;
5583
5584         /*
5585          * This is called by asconf work. It is assumed that a) The TCB is
5586          * locked and b) The INP is locked. This is true in as much as I can
5587          * trace through the entry asconf code where I did these locks.
5588          * Again, the ASCONF code is a bit different in that it does lock
5589          * the INP during its work often times. This must be since we don't
5590          * want other proc's looking up things while what they are looking
5591          * up is changing :-D
5592          */
5593
5594         inp = stcb->sctp_ep;
5595         /* if subset bound and don't allow ASCONF's, can't delete last */
5596         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5597             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5598                 if (stcb->sctp_ep->laddr_count < 2) {
5599                         /* can't delete last address */
5600                         return;
5601                 }
5602         }
5603         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5604                 /* remove the address if it exists */
5605                 if (laddr->ifa == NULL)
5606                         continue;
5607                 if (laddr->ifa == ifa) {
5608                         sctp_remove_laddr(laddr);
5609                         return;
5610                 }
5611         }
5612
5613         /* address not found! */
5614         return;
5615 }
5616
5617 /*
5618  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5619  */
5620 /* sysctl */
5621 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5622 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5623
5624
5625
5626 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5627 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5628 int *sctp_cpuarry = NULL;
5629 void
5630 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5631 {
5632         /* Queue a packet to a processor for the specified core */
5633         struct sctp_mcore_queue *qent;
5634         struct sctp_mcore_ctrl *wkq;
5635         int need_wake = 0;
5636
5637         if (sctp_mcore_workers == NULL) {
5638                 /* Something went way bad during setup */
5639                 sctp_input_with_port(m, off, 0);
5640                 return;
5641         }
5642         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5643             (sizeof(struct sctp_mcore_queue)),
5644             SCTP_M_MCORE);
5645         if (qent == NULL) {
5646                 /* This is trouble  */
5647                 sctp_input_with_port(m, off, 0);
5648                 return;
5649         }
5650         qent->vn = curvnet;
5651         qent->m = m;
5652         qent->off = off;
5653         qent->v6 = 0;
5654         wkq = &sctp_mcore_workers[cpu_to_use];
5655         SCTP_MCORE_QLOCK(wkq);
5656
5657         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5658         if (wkq->running == 0) {
5659                 need_wake = 1;
5660         }
5661         SCTP_MCORE_QUNLOCK(wkq);
5662         if (need_wake) {
5663                 wakeup(&wkq->running);
5664         }
5665 }
5666
5667 static void
5668 sctp_mcore_thread(void *arg)
5669 {
5670
5671         struct sctp_mcore_ctrl *wkq;
5672         struct sctp_mcore_queue *qent;
5673
5674         wkq = (struct sctp_mcore_ctrl *)arg;
5675         struct mbuf *m;
5676         int off, v6;
5677
5678         /* Wait for first tickle */
5679         SCTP_MCORE_LOCK(wkq);
5680         wkq->running = 0;
5681         msleep(&wkq->running,
5682             &wkq->core_mtx,
5683             0, "wait for pkt", 0);
5684         SCTP_MCORE_UNLOCK(wkq);
5685
5686         /* Bind to our cpu */
5687         thread_lock(curthread);
5688         sched_bind(curthread, wkq->cpuid);
5689         thread_unlock(curthread);
5690
5691         /* Now lets start working */
5692         SCTP_MCORE_LOCK(wkq);
5693         /* Now grab lock and go */
5694         for (;;) {
5695                 SCTP_MCORE_QLOCK(wkq);
5696 skip_sleep:
5697                 wkq->running = 1;
5698                 qent = TAILQ_FIRST(&wkq->que);
5699                 if (qent) {
5700                         TAILQ_REMOVE(&wkq->que, qent, next);
5701                         SCTP_MCORE_QUNLOCK(wkq);
5702                         CURVNET_SET(qent->vn);
5703                         m = qent->m;
5704                         off = qent->off;
5705                         v6 = qent->v6;
5706                         SCTP_FREE(qent, SCTP_M_MCORE);
5707                         if (v6 == 0) {
5708                                 sctp_input_with_port(m, off, 0);
5709                         } else {
5710                                 SCTP_PRINTF("V6 not yet supported\n");
5711                                 sctp_m_freem(m);
5712                         }
5713                         CURVNET_RESTORE();
5714                         SCTP_MCORE_QLOCK(wkq);
5715                 }
5716                 wkq->running = 0;
5717                 if (!TAILQ_EMPTY(&wkq->que)) {
5718                         goto skip_sleep;
5719                 }
5720                 SCTP_MCORE_QUNLOCK(wkq);
5721                 msleep(&wkq->running,
5722                     &wkq->core_mtx,
5723                     0, "wait for pkt", 0);
5724         }
5725 }
5726
5727 static void
5728 sctp_startup_mcore_threads(void)
5729 {
5730         int i, cpu;
5731
5732         if (mp_ncpus == 1)
5733                 return;
5734
5735         if (sctp_mcore_workers != NULL) {
5736                 /*
5737                  * Already been here in some previous vnet?
5738                  */
5739                 return;
5740         }
5741         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5742             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5743             SCTP_M_MCORE);
5744         if (sctp_mcore_workers == NULL) {
5745                 /* TSNH I hope */
5746                 return;
5747         }
5748         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5749             sizeof(struct sctp_mcore_ctrl)));
5750         /* Init the structures */
5751         for (i = 0; i <= mp_maxid; i++) {
5752                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5753                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5754                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5755                 sctp_mcore_workers[i].cpuid = i;
5756         }
5757         if (sctp_cpuarry == NULL) {
5758                 SCTP_MALLOC(sctp_cpuarry, int *,
5759                     (mp_ncpus * sizeof(int)),
5760                     SCTP_M_MCORE);
5761                 i = 0;
5762                 CPU_FOREACH(cpu) {
5763                         sctp_cpuarry[i] = cpu;
5764                         i++;
5765                 }
5766         }
5767         /* Now start them all */
5768         CPU_FOREACH(cpu) {
5769                 (void)kproc_create(sctp_mcore_thread,
5770                     (void *)&sctp_mcore_workers[cpu],
5771                     &sctp_mcore_workers[cpu].thread_proc,
5772                     RFPROC,
5773                     SCTP_KTHREAD_PAGES,
5774                     SCTP_MCORE_NAME);
5775
5776         }
5777 }
5778
5779 #endif
5780
5781 void
5782 sctp_pcb_init()
5783 {
5784         /*
5785          * SCTP initialization for the PCB structures should be called by
5786          * the sctp_init() funciton.
5787          */
5788         int i;
5789         struct timeval tv;
5790
5791         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5792                 /* error I was called twice */
5793                 return;
5794         }
5795         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5796
5797 #if defined(SCTP_LOCAL_TRACE_BUF)
5798         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5799 #endif
5800 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5801         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5802             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5803             SCTP_M_MCORE);
5804 #endif
5805         (void)SCTP_GETTIME_TIMEVAL(&tv);
5806 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5807         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5808         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5809         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5810 #else
5811         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5812         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5813         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5814 #endif
5815         /* init the empty list of (All) Endpoints */
5816         LIST_INIT(&SCTP_BASE_INFO(listhead));
5817
5818
5819         /* init the hash table of endpoints */
5820         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5821         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5822         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5823         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5824             &SCTP_BASE_INFO(hashasocmark));
5825         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5826             &SCTP_BASE_INFO(hashmark));
5827         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5828             &SCTP_BASE_INFO(hashtcpmark));
5829         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5830
5831
5832         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5833             &SCTP_BASE_INFO(hashvrfmark));
5834
5835         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5836             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5837         /* init the zones */
5838         /*
5839          * FIX ME: Should check for NULL returns, but if it does fail we are
5840          * doomed to panic anyways... add later maybe.
5841          */
5842         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5843             sizeof(struct sctp_inpcb), maxsockets);
5844
5845         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5846             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5847
5848         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5849             sizeof(struct sctp_laddr),
5850             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5851
5852         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5853             sizeof(struct sctp_nets),
5854             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5855
5856         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5857             sizeof(struct sctp_tmit_chunk),
5858             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5859
5860         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5861             sizeof(struct sctp_queued_to_read),
5862             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5863
5864         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5865             sizeof(struct sctp_stream_queue_pending),
5866             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5867
5868         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5869             sizeof(struct sctp_asconf),
5870             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5871
5872         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5873             sizeof(struct sctp_asconf_ack),
5874             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5875
5876
5877         /* Master Lock INIT for info structure */
5878         SCTP_INP_INFO_LOCK_INIT();
5879         SCTP_STATLOG_INIT_LOCK();
5880
5881         SCTP_IPI_COUNT_INIT();
5882         SCTP_IPI_ADDR_INIT();
5883 #ifdef SCTP_PACKET_LOGGING
5884         SCTP_IP_PKTLOG_INIT();
5885 #endif
5886         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5887
5888         SCTP_WQ_ADDR_INIT();
5889         /* not sure if we need all the counts */
5890         SCTP_BASE_INFO(ipi_count_ep) = 0;
5891         /* assoc/tcb zone info */
5892         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5893         /* local addrlist zone info */
5894         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5895         /* remote addrlist zone info */
5896         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5897         /* chunk info */
5898         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5899
5900         /* socket queue zone info */
5901         SCTP_BASE_INFO(ipi_count_readq) = 0;
5902
5903         /* stream out queue cont */
5904         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5905
5906         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5907         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5908
5909         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5910
5911         /* Init the TIMEWAIT list */
5912         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5913                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5914         }
5915         sctp_startup_iterator();
5916
5917 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5918         sctp_startup_mcore_threads();
5919 #endif
5920
5921         /*
5922          * INIT the default VRF which for BSD is the only one, other O/S's
5923          * may have more. But initially they must start with one and then
5924          * add the VRF's as addresses are added.
5925          */
5926         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5927 }
5928
5929 /*
5930  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5931  */
5932 void
5933 sctp_pcb_finish(void)
5934 {
5935         struct sctp_vrflist *vrf_bucket;
5936         struct sctp_vrf *vrf, *nvrf;
5937         struct sctp_ifn *ifn, *nifn;
5938         struct sctp_ifa *ifa, *nifa;
5939         struct sctpvtaghead *chain;
5940         struct sctp_tagblock *twait_block, *prev_twait_block;
5941         struct sctp_laddr *wi, *nwi;
5942         int i;
5943         struct sctp_iterator *it, *nit;
5944
5945         /*
5946          * In FreeBSD the iterator thread never exits but we do clean up.
5947          * The only way FreeBSD reaches here is if we have VRF's but we
5948          * still add the ifdef to make it compile on old versions.
5949          */
5950         SCTP_IPI_ITERATOR_WQ_LOCK();
5951         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5952                 if (it->vn != curvnet) {
5953                         continue;
5954                 }
5955                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5956                 if (it->function_atend != NULL) {
5957                         (*it->function_atend) (it->pointer, it->val);
5958                 }
5959                 SCTP_FREE(it, SCTP_M_ITER);
5960         }
5961         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5962         SCTP_ITERATOR_LOCK();
5963         if ((sctp_it_ctl.cur_it) &&
5964             (sctp_it_ctl.cur_it->vn == curvnet)) {
5965                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5966         }
5967         SCTP_ITERATOR_UNLOCK();
5968         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5969         SCTP_WQ_ADDR_LOCK();
5970         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5971                 LIST_REMOVE(wi, sctp_nxt_addr);
5972                 SCTP_DECR_LADDR_COUNT();
5973                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5974                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
5975                 }
5976                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5977         }
5978         SCTP_WQ_ADDR_UNLOCK();
5979
5980         /*
5981          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5982          * destroyed first).
5983          */
5984         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5985         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5986                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5987                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5988                                 /* free the ifa */
5989                                 LIST_REMOVE(ifa, next_bucket);
5990                                 LIST_REMOVE(ifa, next_ifa);
5991                                 SCTP_FREE(ifa, SCTP_M_IFA);
5992                         }
5993                         /* free the ifn */
5994                         LIST_REMOVE(ifn, next_bucket);
5995                         LIST_REMOVE(ifn, next_ifn);
5996                         SCTP_FREE(ifn, SCTP_M_IFN);
5997                 }
5998                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5999                 /* free the vrf */
6000                 LIST_REMOVE(vrf, next_vrf);
6001                 SCTP_FREE(vrf, SCTP_M_VRF);
6002         }
6003         /* free the vrf hashes */
6004         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
6005         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
6006
6007         /*
6008          * free the TIMEWAIT list elements malloc'd in the function
6009          * sctp_add_vtag_to_timewait()...
6010          */
6011         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6012                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
6013                 if (!LIST_EMPTY(chain)) {
6014                         prev_twait_block = NULL;
6015                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6016                                 if (prev_twait_block) {
6017                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6018                                 }
6019                                 prev_twait_block = twait_block;
6020                         }
6021                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6022                 }
6023         }
6024
6025         /* free the locks and mutexes */
6026 #ifdef SCTP_PACKET_LOGGING
6027         SCTP_IP_PKTLOG_DESTROY();
6028 #endif
6029         SCTP_IPI_ADDR_DESTROY();
6030         SCTP_STATLOG_DESTROY();
6031         SCTP_INP_INFO_LOCK_DESTROY();
6032
6033         SCTP_WQ_ADDR_DESTROY();
6034
6035         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6036         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6037         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6038         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6039         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6040         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6041         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6042         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6043         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6044         /* Get rid of other stuff to */
6045         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6046                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6047         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6048                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6049         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6050                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6051 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6052         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6053 #endif
6054 }
6055
6056
6057 int
6058 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6059     int offset, int limit,
6060     struct sockaddr *src, struct sockaddr *dst,
6061     struct sockaddr *altsa)
6062 {
6063         /*
6064          * grub through the INIT pulling addresses and loading them to the
6065          * nets structure in the asoc. The from address in the mbuf should
6066          * also be loaded (if it is not already). This routine can be called
6067          * with either INIT or INIT-ACK's as long as the m points to the IP
6068          * packet and the offset points to the beginning of the parameters.
6069          */
6070         struct sctp_inpcb *inp;
6071         struct sctp_nets *net, *nnet, *net_tmp;
6072         struct sctp_paramhdr *phdr, parm_buf;
6073         struct sctp_tcb *stcb_tmp;
6074         uint16_t ptype, plen;
6075         struct sockaddr *sa;
6076         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6077         struct sctp_auth_random *p_random = NULL;
6078         uint16_t random_len = 0;
6079         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6080         struct sctp_auth_hmac_algo *hmacs = NULL;
6081         uint16_t hmacs_len = 0;
6082         uint8_t saw_asconf = 0;
6083         uint8_t saw_asconf_ack = 0;
6084         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6085         struct sctp_auth_chunk_list *chunks = NULL;
6086         uint16_t num_chunks = 0;
6087         sctp_key_t *new_key;
6088         uint32_t keylen;
6089         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6090         uint8_t peer_supports_ecn;
6091         uint8_t peer_supports_prsctp;
6092         uint8_t peer_supports_auth;
6093         uint8_t peer_supports_asconf;
6094         uint8_t peer_supports_asconf_ack;
6095         uint8_t peer_supports_reconfig;
6096         uint8_t peer_supports_nrsack;
6097         uint8_t peer_supports_pktdrop;
6098
6099 #ifdef INET
6100         struct sockaddr_in sin;
6101
6102 #endif
6103 #ifdef INET6
6104         struct sockaddr_in6 sin6;
6105
6106 #endif
6107
6108         /* First get the destination address setup too. */
6109 #ifdef INET
6110         memset(&sin, 0, sizeof(sin));
6111         sin.sin_family = AF_INET;
6112         sin.sin_len = sizeof(sin);
6113         sin.sin_port = stcb->rport;
6114 #endif
6115 #ifdef INET6
6116         memset(&sin6, 0, sizeof(sin6));
6117         sin6.sin6_family = AF_INET6;
6118         sin6.sin6_len = sizeof(struct sockaddr_in6);
6119         sin6.sin6_port = stcb->rport;
6120 #endif
6121         if (altsa) {
6122                 sa = altsa;
6123         } else {
6124                 sa = src;
6125         }
6126         peer_supports_ecn = 0;
6127         peer_supports_prsctp = 0;
6128         peer_supports_auth = 0;
6129         peer_supports_asconf = 0;
6130         peer_supports_reconfig = 0;
6131         peer_supports_nrsack = 0;
6132         peer_supports_pktdrop = 0;
6133         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6134                 /* mark all addresses that we have currently on the list */
6135                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6136         }
6137         /* does the source address already exist? if so skip it */
6138         inp = stcb->sctp_ep;
6139         atomic_add_int(&stcb->asoc.refcnt, 1);
6140         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6141         atomic_add_int(&stcb->asoc.refcnt, -1);
6142
6143         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6144                 /* we must add the source address */
6145                 /* no scope set here since we have a tcb already. */
6146                 switch (sa->sa_family) {
6147 #ifdef INET
6148                 case AF_INET:
6149                         if (stcb->asoc.scope.ipv4_addr_legal) {
6150                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6151                                         return (-1);
6152                                 }
6153                         }
6154                         break;
6155 #endif
6156 #ifdef INET6
6157                 case AF_INET6:
6158                         if (stcb->asoc.scope.ipv6_addr_legal) {
6159                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6160                                         return (-2);
6161                                 }
6162                         }
6163                         break;
6164 #endif
6165                 default:
6166                         break;
6167                 }
6168         } else {
6169                 if (net_tmp != NULL && stcb_tmp == stcb) {
6170                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6171                 } else if (stcb_tmp != stcb) {
6172                         /* It belongs to another association? */
6173                         if (stcb_tmp)
6174                                 SCTP_TCB_UNLOCK(stcb_tmp);
6175                         return (-3);
6176                 }
6177         }
6178         if (stcb->asoc.state == 0) {
6179                 /* the assoc was freed? */
6180                 return (-4);
6181         }
6182         /* now we must go through each of the params. */
6183         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6184         while (phdr) {
6185                 ptype = ntohs(phdr->param_type);
6186                 plen = ntohs(phdr->param_length);
6187                 /*
6188                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6189                  * (uint32_t)ptype, (int)plen);
6190                  */
6191                 if (offset + plen > limit) {
6192                         break;
6193                 }
6194                 if (plen == 0) {
6195                         break;
6196                 }
6197 #ifdef INET
6198                 if (ptype == SCTP_IPV4_ADDRESS) {
6199                         if (stcb->asoc.scope.ipv4_addr_legal) {
6200                                 struct sctp_ipv4addr_param *p4, p4_buf;
6201
6202                                 /* ok get the v4 address and check/add */
6203                                 phdr = sctp_get_next_param(m, offset,
6204                                     (struct sctp_paramhdr *)&p4_buf,
6205                                     sizeof(p4_buf));
6206                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6207                                     phdr == NULL) {
6208                                         return (-5);
6209                                 }
6210                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6211                                 sin.sin_addr.s_addr = p4->addr;
6212                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6213                                         /* Skip multi-cast addresses */
6214                                         goto next_param;
6215                                 }
6216                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6217                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6218                                         goto next_param;
6219                                 }
6220                                 sa = (struct sockaddr *)&sin;
6221                                 inp = stcb->sctp_ep;
6222                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6223                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6224                                     dst, stcb);
6225                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6226
6227                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6228                                     inp == NULL) {
6229                                         /* we must add the source address */
6230                                         /*
6231                                          * no scope set since we have a tcb
6232                                          * already
6233                                          */
6234
6235                                         /*
6236                                          * we must validate the state again
6237                                          * here
6238                                          */
6239                         add_it_now:
6240                                         if (stcb->asoc.state == 0) {
6241                                                 /* the assoc was freed? */
6242                                                 return (-7);
6243                                         }
6244                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6245                                                 return (-8);
6246                                         }
6247                                 } else if (stcb_tmp == stcb) {
6248                                         if (stcb->asoc.state == 0) {
6249                                                 /* the assoc was freed? */
6250                                                 return (-10);
6251                                         }
6252                                         if (net != NULL) {
6253                                                 /* clear flag */
6254                                                 net->dest_state &=
6255                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6256                                         }
6257                                 } else {
6258                                         /*
6259                                          * strange, address is in another
6260                                          * assoc? straighten out locks.
6261                                          */
6262                                         if (stcb_tmp) {
6263                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6264                                                         /*
6265                                                          * in setup state we
6266                                                          * abort this guy
6267                                                          */
6268                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6269                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6270                                                         goto add_it_now;
6271                                                 }
6272                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6273                                         }
6274                                         if (stcb->asoc.state == 0) {
6275                                                 /* the assoc was freed? */
6276                                                 return (-12);
6277                                         }
6278                                         return (-13);
6279                                 }
6280                         }
6281                 } else
6282 #endif
6283 #ifdef INET6
6284                 if (ptype == SCTP_IPV6_ADDRESS) {
6285                         if (stcb->asoc.scope.ipv6_addr_legal) {
6286                                 /* ok get the v6 address and check/add */
6287                                 struct sctp_ipv6addr_param *p6, p6_buf;
6288
6289                                 phdr = sctp_get_next_param(m, offset,
6290                                     (struct sctp_paramhdr *)&p6_buf,
6291                                     sizeof(p6_buf));
6292                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6293                                     phdr == NULL) {
6294                                         return (-14);
6295                                 }
6296                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6297                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6298                                     sizeof(p6->addr));
6299                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6300                                         /* Skip multi-cast addresses */
6301                                         goto next_param;
6302                                 }
6303                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6304                                         /*
6305                                          * Link local make no sense without
6306                                          * scope
6307                                          */
6308                                         goto next_param;
6309                                 }
6310                                 sa = (struct sockaddr *)&sin6;
6311                                 inp = stcb->sctp_ep;
6312                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6313                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6314                                     dst, stcb);
6315                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6316                                 if (stcb_tmp == NULL &&
6317                                     (inp == stcb->sctp_ep || inp == NULL)) {
6318                                         /*
6319                                          * we must validate the state again
6320                                          * here
6321                                          */
6322                         add_it_now6:
6323                                         if (stcb->asoc.state == 0) {
6324                                                 /* the assoc was freed? */
6325                                                 return (-16);
6326                                         }
6327                                         /*
6328                                          * we must add the address, no scope
6329                                          * set
6330                                          */
6331                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6332                                                 return (-17);
6333                                         }
6334                                 } else if (stcb_tmp == stcb) {
6335                                         /*
6336                                          * we must validate the state again
6337                                          * here
6338                                          */
6339                                         if (stcb->asoc.state == 0) {
6340                                                 /* the assoc was freed? */
6341                                                 return (-19);
6342                                         }
6343                                         if (net != NULL) {
6344                                                 /* clear flag */
6345                                                 net->dest_state &=
6346                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6347                                         }
6348                                 } else {
6349                                         /*
6350                                          * strange, address is in another
6351                                          * assoc? straighten out locks.
6352                                          */
6353                                         if (stcb_tmp)
6354                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6355                                                         /*
6356                                                          * in setup state we
6357                                                          * abort this guy
6358                                                          */
6359                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6360                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6361                                                         goto add_it_now6;
6362                                                 }
6363                                         SCTP_TCB_UNLOCK(stcb_tmp);
6364
6365                                         if (stcb->asoc.state == 0) {
6366                                                 /* the assoc was freed? */
6367                                                 return (-21);
6368                                         }
6369                                         return (-22);
6370                                 }
6371                         }
6372                 } else
6373 #endif
6374                 if (ptype == SCTP_ECN_CAPABLE) {
6375                         peer_supports_ecn = 1;
6376                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6377                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6378                                 struct sctp_adaptation_layer_indication ai,
6379                                                                 *aip;
6380
6381                                 phdr = sctp_get_next_param(m, offset,
6382                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6383                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6384                                 if (aip) {
6385                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6386                                         stcb->asoc.adaptation_needed = 1;
6387                                 }
6388                         }
6389                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6390                         struct sctp_asconf_addr_param lstore, *fee;
6391                         int lptype;
6392                         struct sockaddr *lsa = NULL;
6393
6394 #ifdef INET
6395                         struct sctp_asconf_addrv4_param *fii;
6396
6397 #endif
6398
6399                         if (stcb->asoc.asconf_supported == 0) {
6400                                 return (-100);
6401                         }
6402                         if (plen > sizeof(lstore)) {
6403                                 return (-23);
6404                         }
6405                         phdr = sctp_get_next_param(m, offset,
6406                             (struct sctp_paramhdr *)&lstore,
6407                             min(plen, sizeof(lstore)));
6408                         if (phdr == NULL) {
6409                                 return (-24);
6410                         }
6411                         fee = (struct sctp_asconf_addr_param *)phdr;
6412                         lptype = ntohs(fee->addrp.ph.param_type);
6413                         switch (lptype) {
6414 #ifdef INET
6415                         case SCTP_IPV4_ADDRESS:
6416                                 if (plen !=
6417                                     sizeof(struct sctp_asconf_addrv4_param)) {
6418                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6419                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6420                                             plen);
6421                                 } else {
6422                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6423                                         sin.sin_addr.s_addr = fii->addrp.addr;
6424                                         lsa = (struct sockaddr *)&sin;
6425                                 }
6426                                 break;
6427 #endif
6428 #ifdef INET6
6429                         case SCTP_IPV6_ADDRESS:
6430                                 if (plen !=
6431                                     sizeof(struct sctp_asconf_addr_param)) {
6432                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6433                                             (int)sizeof(struct sctp_asconf_addr_param),
6434                                             plen);
6435                                 } else {
6436                                         memcpy(sin6.sin6_addr.s6_addr,
6437                                             fee->addrp.addr,
6438                                             sizeof(fee->addrp.addr));
6439                                         lsa = (struct sockaddr *)&sin6;
6440                                 }
6441                                 break;
6442 #endif
6443                         default:
6444                                 break;
6445                         }
6446                         if (lsa) {
6447                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6448                         }
6449                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6450                         stcb->asoc.peer_supports_nat = 1;
6451                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6452                         /* Peer supports pr-sctp */
6453                         peer_supports_prsctp = 1;
6454                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6455                         /* A supported extension chunk */
6456                         struct sctp_supported_chunk_types_param *pr_supported;
6457                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6458                         int num_ent, i;
6459
6460                         phdr = sctp_get_next_param(m, offset,
6461                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6462                         if (phdr == NULL) {
6463                                 return (-25);
6464                         }
6465                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6466                         num_ent = plen - sizeof(struct sctp_paramhdr);
6467                         for (i = 0; i < num_ent; i++) {
6468                                 switch (pr_supported->chunk_types[i]) {
6469                                 case SCTP_ASCONF:
6470                                         peer_supports_asconf = 1;
6471                                 case SCTP_ASCONF_ACK:
6472                                         peer_supports_asconf_ack = 1;
6473                                         break;
6474                                 case SCTP_FORWARD_CUM_TSN:
6475                                         peer_supports_prsctp = 1;
6476                                         break;
6477                                 case SCTP_PACKET_DROPPED:
6478                                         peer_supports_pktdrop = 1;
6479                                         break;
6480                                 case SCTP_NR_SELECTIVE_ACK:
6481                                         peer_supports_nrsack = 1;
6482                                         break;
6483                                 case SCTP_STREAM_RESET:
6484                                         peer_supports_reconfig = 1;
6485                                         break;
6486                                 case SCTP_AUTHENTICATION:
6487                                         peer_supports_auth = 1;
6488                                         break;
6489                                 default:
6490                                         /* one I have not learned yet */
6491                                         break;
6492
6493                                 }
6494                         }
6495                 } else if (ptype == SCTP_RANDOM) {
6496                         if (plen > sizeof(random_store))
6497                                 break;
6498                         if (got_random) {
6499                                 /* already processed a RANDOM */
6500                                 goto next_param;
6501                         }
6502                         phdr = sctp_get_next_param(m, offset,
6503                             (struct sctp_paramhdr *)random_store,
6504                             min(sizeof(random_store), plen));
6505                         if (phdr == NULL)
6506                                 return (-26);
6507                         p_random = (struct sctp_auth_random *)phdr;
6508                         random_len = plen - sizeof(*p_random);
6509                         /* enforce the random length */
6510                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6511                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6512                                 return (-27);
6513                         }
6514                         got_random = 1;
6515                 } else if (ptype == SCTP_HMAC_LIST) {
6516                         uint16_t num_hmacs;
6517                         uint16_t i;
6518
6519                         if (plen > sizeof(hmacs_store))
6520                                 break;
6521                         if (got_hmacs) {
6522                                 /* already processed a HMAC list */
6523                                 goto next_param;
6524                         }
6525                         phdr = sctp_get_next_param(m, offset,
6526                             (struct sctp_paramhdr *)hmacs_store,
6527                             min(plen, sizeof(hmacs_store)));
6528                         if (phdr == NULL)
6529                                 return (-28);
6530                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6531                         hmacs_len = plen - sizeof(*hmacs);
6532                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6533                         /* validate the hmac list */
6534                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6535                                 return (-29);
6536                         }
6537                         if (stcb->asoc.peer_hmacs != NULL)
6538                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6539                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6540                         if (stcb->asoc.peer_hmacs != NULL) {
6541                                 for (i = 0; i < num_hmacs; i++) {
6542                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6543                                             ntohs(hmacs->hmac_ids[i]));
6544                                 }
6545                         }
6546                         got_hmacs = 1;
6547                 } else if (ptype == SCTP_CHUNK_LIST) {
6548                         int i;
6549
6550                         if (plen > sizeof(chunks_store))
6551                                 break;
6552                         if (got_chklist) {
6553                                 /* already processed a Chunks list */
6554                                 goto next_param;
6555                         }
6556                         phdr = sctp_get_next_param(m, offset,
6557                             (struct sctp_paramhdr *)chunks_store,
6558                             min(plen, sizeof(chunks_store)));
6559                         if (phdr == NULL)
6560                                 return (-30);
6561                         chunks = (struct sctp_auth_chunk_list *)phdr;
6562                         num_chunks = plen - sizeof(*chunks);
6563                         if (stcb->asoc.peer_auth_chunks != NULL)
6564                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6565                         else
6566                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6567                         for (i = 0; i < num_chunks; i++) {
6568                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6569                                     stcb->asoc.peer_auth_chunks);
6570                                 /* record asconf/asconf-ack if listed */
6571                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6572                                         saw_asconf = 1;
6573                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6574                                         saw_asconf_ack = 1;
6575
6576                         }
6577                         got_chklist = 1;
6578                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6579                             (ptype == SCTP_STATE_COOKIE) ||
6580                             (ptype == SCTP_UNRECOG_PARAM) ||
6581                             (ptype == SCTP_COOKIE_PRESERVE) ||
6582                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6583                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6584                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6585                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6586                     (ptype == SCTP_SUCCESS_REPORT)) {
6587                          /* don't care */ ;
6588                 } else {
6589                         if ((ptype & 0x8000) == 0x0000) {
6590                                 /*
6591                                  * must stop processing the rest of the
6592                                  * param's. Any report bits were handled
6593                                  * with the call to
6594                                  * sctp_arethere_unrecognized_parameters()
6595                                  * when the INIT or INIT-ACK was first seen.
6596                                  */
6597                                 break;
6598                         }
6599                 }
6600
6601 next_param:
6602                 offset += SCTP_SIZE32(plen);
6603                 if (offset >= limit) {
6604                         break;
6605                 }
6606                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6607                     sizeof(parm_buf));
6608         }
6609         /* Now check to see if we need to purge any addresses */
6610         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6611                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6612                     SCTP_ADDR_NOT_IN_ASSOC) {
6613                         /* This address has been removed from the asoc */
6614                         /* remove and free it */
6615                         stcb->asoc.numnets--;
6616                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6617                         sctp_free_remote_addr(net);
6618                         if (net == stcb->asoc.primary_destination) {
6619                                 stcb->asoc.primary_destination = NULL;
6620                                 sctp_select_primary_destination(stcb);
6621                         }
6622                 }
6623         }
6624         if ((stcb->asoc.ecn_supported == 1) &&
6625             (peer_supports_ecn == 0)) {
6626                 stcb->asoc.ecn_supported = 0;
6627         }
6628         if ((stcb->asoc.prsctp_supported == 1) &&
6629             (peer_supports_prsctp == 0)) {
6630                 stcb->asoc.prsctp_supported = 0;
6631         }
6632         if ((stcb->asoc.auth_supported == 1) &&
6633             ((peer_supports_auth == 0) ||
6634             (got_random == 0) || (got_hmacs == 0))) {
6635                 stcb->asoc.auth_supported = 0;
6636         }
6637         if ((stcb->asoc.asconf_supported == 1) &&
6638             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6639             (stcb->asoc.auth_supported == 0) ||
6640             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6641                 stcb->asoc.asconf_supported = 0;
6642         }
6643         if ((stcb->asoc.reconfig_supported == 1) &&
6644             (peer_supports_reconfig == 0)) {
6645                 stcb->asoc.reconfig_supported = 0;
6646         }
6647         if ((stcb->asoc.nrsack_supported == 1) &&
6648             (peer_supports_nrsack == 0)) {
6649                 stcb->asoc.nrsack_supported = 0;
6650         }
6651         if ((stcb->asoc.pktdrop_supported == 1) &&
6652             (peer_supports_pktdrop == 0)) {
6653                 stcb->asoc.pktdrop_supported = 0;
6654         }
6655         /* validate authentication required parameters */
6656         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6657                 /* peer does not support auth but sent a chunks list? */
6658                 return (-31);
6659         }
6660         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6661                 /* peer supports asconf but not auth? */
6662                 return (-32);
6663         } else if ((peer_supports_asconf == 1) &&
6664                     (peer_supports_auth == 1) &&
6665             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6666                 return (-33);
6667         }
6668         /* concatenate the full random key */
6669         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6670         if (chunks != NULL) {
6671                 keylen += sizeof(*chunks) + num_chunks;
6672         }
6673         new_key = sctp_alloc_key(keylen);
6674         if (new_key != NULL) {
6675                 /* copy in the RANDOM */
6676                 if (p_random != NULL) {
6677                         keylen = sizeof(*p_random) + random_len;
6678                         bcopy(p_random, new_key->key, keylen);
6679                 }
6680                 /* append in the AUTH chunks */
6681                 if (chunks != NULL) {
6682                         bcopy(chunks, new_key->key + keylen,
6683                             sizeof(*chunks) + num_chunks);
6684                         keylen += sizeof(*chunks) + num_chunks;
6685                 }
6686                 /* append in the HMACs */
6687                 if (hmacs != NULL) {
6688                         bcopy(hmacs, new_key->key + keylen,
6689                             sizeof(*hmacs) + hmacs_len);
6690                 }
6691         } else {
6692                 /* failed to get memory for the key */
6693                 return (-34);
6694         }
6695         if (stcb->asoc.authinfo.peer_random != NULL)
6696                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6697         stcb->asoc.authinfo.peer_random = new_key;
6698         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6699         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6700
6701         return (0);
6702 }
6703
6704 int
6705 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6706     struct sctp_nets *net)
6707 {
6708         /* make sure the requested primary address exists in the assoc */
6709         if (net == NULL && sa)
6710                 net = sctp_findnet(stcb, sa);
6711
6712         if (net == NULL) {
6713                 /* didn't find the requested primary address! */
6714                 return (-1);
6715         } else {
6716                 /* set the primary address */
6717                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6718                         /* Must be confirmed, so queue to set */
6719                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6720                         return (0);
6721                 }
6722                 stcb->asoc.primary_destination = net;
6723                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6724                         sctp_free_remote_addr(stcb->asoc.alternate);
6725                         stcb->asoc.alternate = NULL;
6726                 }
6727                 net = TAILQ_FIRST(&stcb->asoc.nets);
6728                 if (net != stcb->asoc.primary_destination) {
6729                         /*
6730                          * first one on the list is NOT the primary
6731                          * sctp_cmpaddr() is much more efficient if the
6732                          * primary is the first on the list, make it so.
6733                          */
6734                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6735                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6736                 }
6737                 return (0);
6738         }
6739 }
6740
6741 int
6742 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6743 {
6744         /*
6745          * This function serves two purposes. It will see if a TAG can be
6746          * re-used and return 1 for yes it is ok and 0 for don't use that
6747          * tag. A secondary function it will do is purge out old tags that
6748          * can be removed.
6749          */
6750         struct sctpvtaghead *chain;
6751         struct sctp_tagblock *twait_block;
6752         struct sctpasochead *head;
6753         struct sctp_tcb *stcb;
6754         int i;
6755
6756         SCTP_INP_INFO_RLOCK();
6757         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6758             SCTP_BASE_INFO(hashasocmark))];
6759         if (head == NULL) {
6760                 /* invalid vtag */
6761                 goto skip_vtag_check;
6762         }
6763         LIST_FOREACH(stcb, head, sctp_asocs) {
6764                 /*
6765                  * We choose not to lock anything here. TCB's can't be
6766                  * removed since we have the read lock, so they can't be
6767                  * freed on us, same thing for the INP. I may be wrong with
6768                  * this assumption, but we will go with it for now :-)
6769                  */
6770                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6771                         continue;
6772                 }
6773                 if (stcb->asoc.my_vtag == tag) {
6774                         /* candidate */
6775                         if (stcb->rport != rport) {
6776                                 continue;
6777                         }
6778                         if (stcb->sctp_ep->sctp_lport != lport) {
6779                                 continue;
6780                         }
6781                         /* Its a used tag set */
6782                         SCTP_INP_INFO_RUNLOCK();
6783                         return (0);
6784                 }
6785         }
6786 skip_vtag_check:
6787
6788         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6789         /* Now what about timed wait ? */
6790         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6791                 /*
6792                  * Block(s) are present, lets see if we have this tag in the
6793                  * list
6794                  */
6795                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6796                         if (twait_block->vtag_block[i].v_tag == 0) {
6797                                 /* not used */
6798                                 continue;
6799                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6800                             now->tv_sec) {
6801                                 /* Audit expires this guy */
6802                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6803                                 twait_block->vtag_block[i].v_tag = 0;
6804                                 twait_block->vtag_block[i].lport = 0;
6805                                 twait_block->vtag_block[i].rport = 0;
6806                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6807                                     (twait_block->vtag_block[i].lport == lport) &&
6808                             (twait_block->vtag_block[i].rport == rport)) {
6809                                 /* Bad tag, sorry :< */
6810                                 SCTP_INP_INFO_RUNLOCK();
6811                                 return (0);
6812                         }
6813                 }
6814         }
6815         SCTP_INP_INFO_RUNLOCK();
6816         return (1);
6817 }
6818
6819 static void
6820 sctp_drain_mbufs(struct sctp_tcb *stcb)
6821 {
6822         /*
6823          * We must hunt this association for MBUF's past the cumack (i.e.
6824          * out of order data that we can renege on).
6825          */
6826         struct sctp_association *asoc;
6827         struct sctp_tmit_chunk *chk, *nchk;
6828         uint32_t cumulative_tsn_p1;
6829         struct sctp_queued_to_read *ctl, *nctl;
6830         int cnt, strmat;
6831         uint32_t gap, i;
6832         int fnd = 0;
6833
6834         /* We look for anything larger than the cum-ack + 1 */
6835
6836         asoc = &stcb->asoc;
6837         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6838                 /* none we can reneg on. */
6839                 return;
6840         }
6841         SCTP_STAT_INCR(sctps_protocol_drains_done);
6842         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6843         cnt = 0;
6844         /* First look in the re-assembly queue */
6845         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6846                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6847                         /* Yep it is above cum-ack */
6848                         cnt++;
6849                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6850                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6851                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6852                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6853                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6854                         if (chk->data) {
6855                                 sctp_m_freem(chk->data);
6856                                 chk->data = NULL;
6857                         }
6858                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6859                 }
6860         }
6861         /* Ok that was fun, now we will drain all the inbound streams? */
6862         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6863                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6864                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6865                                 /* Yep it is above cum-ack */
6866                                 cnt++;
6867                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6868                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6869                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6870                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6871                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6872                                 if (ctl->data) {
6873                                         sctp_m_freem(ctl->data);
6874                                         ctl->data = NULL;
6875                                 }
6876                                 sctp_free_remote_addr(ctl->whoFrom);
6877                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6878                                 SCTP_DECR_READQ_COUNT();
6879                         }
6880                 }
6881         }
6882         if (cnt) {
6883                 /* We must back down to see what the new highest is */
6884                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6885                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6886                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6887                                 asoc->highest_tsn_inside_map = i;
6888                                 fnd = 1;
6889                                 break;
6890                         }
6891                 }
6892                 if (!fnd) {
6893                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6894                 }
6895                 /*
6896                  * Question, should we go through the delivery queue? The
6897                  * only reason things are on here is the app not reading OR
6898                  * a p-d-api up. An attacker COULD send enough in to
6899                  * initiate the PD-API and then send a bunch of stuff to
6900                  * other streams... these would wind up on the delivery
6901                  * queue.. and then we would not get to them. But in order
6902                  * to do this I then have to back-track and un-deliver
6903                  * sequence numbers in streams.. el-yucko. I think for now
6904                  * we will NOT look at the delivery queue and leave it to be
6905                  * something to consider later. An alternative would be to
6906                  * abort the P-D-API with a notification and then deliver
6907                  * the data.... Or another method might be to keep track of
6908                  * how many times the situation occurs and if we see a
6909                  * possible attack underway just abort the association.
6910                  */
6911 #ifdef SCTP_DEBUG
6912                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6913 #endif
6914                 /*
6915                  * Now do we need to find a new
6916                  * asoc->highest_tsn_inside_map?
6917                  */
6918                 asoc->last_revoke_count = cnt;
6919                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6920                 /* sa_ignore NO_NULL_CHK */
6921                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6922                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6923         }
6924         /*
6925          * Another issue, in un-setting the TSN's in the mapping array we
6926          * DID NOT adjust the highest_tsn marker.  This will cause one of
6927          * two things to occur. It may cause us to do extra work in checking
6928          * for our mapping array movement. More importantly it may cause us
6929          * to SACK every datagram. This may not be a bad thing though since
6930          * we will recover once we get our cum-ack above and all this stuff
6931          * we dumped recovered.
6932          */
6933 }
6934
6935 void
6936 sctp_drain()
6937 {
6938         /*
6939          * We must walk the PCB lists for ALL associations here. The system
6940          * is LOW on MBUF's and needs help. This is where reneging will
6941          * occur. We really hope this does NOT happen!
6942          */
6943         VNET_ITERATOR_DECL(vnet_iter);
6944         VNET_LIST_RLOCK_NOSLEEP();
6945         VNET_FOREACH(vnet_iter) {
6946                 CURVNET_SET(vnet_iter);
6947                 struct sctp_inpcb *inp;
6948                 struct sctp_tcb *stcb;
6949
6950                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6951                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6952 #ifdef VIMAGE
6953                         continue;
6954 #else
6955                         return;
6956 #endif
6957                 }
6958                 SCTP_INP_INFO_RLOCK();
6959                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6960                         /* For each endpoint */
6961                         SCTP_INP_RLOCK(inp);
6962                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6963                                 /* For each association */
6964                                 SCTP_TCB_LOCK(stcb);
6965                                 sctp_drain_mbufs(stcb);
6966                                 SCTP_TCB_UNLOCK(stcb);
6967                         }
6968                         SCTP_INP_RUNLOCK(inp);
6969                 }
6970                 SCTP_INP_INFO_RUNLOCK();
6971                 CURVNET_RESTORE();
6972         }
6973         VNET_LIST_RUNLOCK_NOSLEEP();
6974 }
6975
6976 /*
6977  * start a new iterator
6978  * iterates through all endpoints and associations based on the pcb_state
6979  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6980  * assocs and "ef" (optional) is executed when the iterator completes.
6981  * "inpf" (optional) is executed for each new endpoint as it is being
6982  * iterated through. inpe (optional) is called when the inp completes
6983  * its way through all the stcbs.
6984  */
6985 int
6986 sctp_initiate_iterator(inp_func inpf,
6987     asoc_func af,
6988     inp_func inpe,
6989     uint32_t pcb_state,
6990     uint32_t pcb_features,
6991     uint32_t asoc_state,
6992     void *argp,
6993     uint32_t argi,
6994     end_func ef,
6995     struct sctp_inpcb *s_inp,
6996     uint8_t chunk_output_off)
6997 {
6998         struct sctp_iterator *it = NULL;
6999
7000         if (af == NULL) {
7001                 return (-1);
7002         }
7003         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7004             SCTP_M_ITER);
7005         if (it == NULL) {
7006                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7007                 return (ENOMEM);
7008         }
7009         memset(it, 0, sizeof(*it));
7010         it->function_assoc = af;
7011         it->function_inp = inpf;
7012         if (inpf)
7013                 it->done_current_ep = 0;
7014         else
7015                 it->done_current_ep = 1;
7016         it->function_atend = ef;
7017         it->pointer = argp;
7018         it->val = argi;
7019         it->pcb_flags = pcb_state;
7020         it->pcb_features = pcb_features;
7021         it->asoc_state = asoc_state;
7022         it->function_inp_end = inpe;
7023         it->no_chunk_output = chunk_output_off;
7024         it->vn = curvnet;
7025         if (s_inp) {
7026                 /* Assume lock is held here */
7027                 it->inp = s_inp;
7028                 SCTP_INP_INCR_REF(it->inp);
7029                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7030         } else {
7031                 SCTP_INP_INFO_RLOCK();
7032                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7033                 if (it->inp) {
7034                         SCTP_INP_INCR_REF(it->inp);
7035                 }
7036                 SCTP_INP_INFO_RUNLOCK();
7037                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7038
7039         }
7040         SCTP_IPI_ITERATOR_WQ_LOCK();
7041
7042         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7043         if (sctp_it_ctl.iterator_running == 0) {
7044                 sctp_wakeup_iterator();
7045         }
7046         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7047         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7048         return (0);
7049 }