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", __func__);
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                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1445                         if (stcb->rport != rport) {
1446                                 /* remote port does not match */
1447                                 continue;
1448                         }
1449                         SCTP_TCB_LOCK(stcb);
1450                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1451                                 SCTP_TCB_UNLOCK(stcb);
1452                                 continue;
1453                         }
1454                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1455                                 SCTP_TCB_UNLOCK(stcb);
1456                                 continue;
1457                         }
1458                         /* now look at the list of remote addresses */
1459                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1460 #ifdef INVARIANTS
1461                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1462                                         panic("Corrupt net list");
1463                                 }
1464 #endif
1465                                 if (net->ro._l_addr.sa.sa_family !=
1466                                     remote->sa_family) {
1467                                         /* not the same family */
1468                                         continue;
1469                                 }
1470                                 switch (remote->sa_family) {
1471 #ifdef INET
1472                                 case AF_INET:
1473                                         {
1474                                                 struct sockaddr_in *sin,
1475                                                            *rsin;
1476
1477                                                 sin = (struct sockaddr_in *)
1478                                                     &net->ro._l_addr;
1479                                                 rsin = (struct sockaddr_in *)remote;
1480                                                 if (sin->sin_addr.s_addr ==
1481                                                     rsin->sin_addr.s_addr) {
1482                                                         /* found it */
1483                                                         if (netp != NULL) {
1484                                                                 *netp = net;
1485                                                         }
1486                                                         if (locked_tcb == NULL) {
1487                                                                 SCTP_INP_DECR_REF(inp);
1488                                                         } else if (locked_tcb != stcb) {
1489                                                                 SCTP_TCB_LOCK(locked_tcb);
1490                                                         }
1491                                                         if (locked_tcb) {
1492                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1493                                                         }
1494                                                         SCTP_INP_WUNLOCK(inp);
1495                                                         SCTP_INP_INFO_RUNLOCK();
1496                                                         return (stcb);
1497                                                 }
1498                                                 break;
1499                                         }
1500 #endif
1501 #ifdef INET6
1502                                 case AF_INET6:
1503                                         {
1504                                                 struct sockaddr_in6 *sin6,
1505                                                             *rsin6;
1506
1507                                                 sin6 = (struct sockaddr_in6 *)
1508                                                     &net->ro._l_addr;
1509                                                 rsin6 = (struct sockaddr_in6 *)remote;
1510                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1511                                                     rsin6)) {
1512                                                         /* found it */
1513                                                         if (netp != NULL) {
1514                                                                 *netp = net;
1515                                                         }
1516                                                         if (locked_tcb == NULL) {
1517                                                                 SCTP_INP_DECR_REF(inp);
1518                                                         } else if (locked_tcb != stcb) {
1519                                                                 SCTP_TCB_LOCK(locked_tcb);
1520                                                         }
1521                                                         if (locked_tcb) {
1522                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1523                                                         }
1524                                                         SCTP_INP_WUNLOCK(inp);
1525                                                         SCTP_INP_INFO_RUNLOCK();
1526                                                         return (stcb);
1527                                                 }
1528                                                 break;
1529                                         }
1530 #endif
1531                                 default:
1532                                         /* TSNH */
1533                                         break;
1534                                 }
1535                         }
1536                         SCTP_TCB_UNLOCK(stcb);
1537                 }
1538         }
1539 null_return:
1540         /* clean up for returning null */
1541         if (locked_tcb) {
1542                 SCTP_TCB_LOCK(locked_tcb);
1543                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1544         }
1545         SCTP_INP_WUNLOCK(inp);
1546         SCTP_INP_INFO_RUNLOCK();
1547         /* not found */
1548         return (NULL);
1549 }
1550
1551
1552 /*
1553  * Find an association for a specific endpoint using the association id given
1554  * out in the COMM_UP notification
1555  */
1556 struct sctp_tcb *
1557 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1558 {
1559         /*
1560          * Use my the assoc_id to find a endpoint
1561          */
1562         struct sctpasochead *head;
1563         struct sctp_tcb *stcb;
1564         uint32_t id;
1565
1566         if (inp == NULL) {
1567                 SCTP_PRINTF("TSNH ep_associd\n");
1568                 return (NULL);
1569         }
1570         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1571                 SCTP_PRINTF("TSNH ep_associd0\n");
1572                 return (NULL);
1573         }
1574         id = (uint32_t) asoc_id;
1575         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1576         if (head == NULL) {
1577                 /* invalid id TSNH */
1578                 SCTP_PRINTF("TSNH ep_associd1\n");
1579                 return (NULL);
1580         }
1581         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1582                 if (stcb->asoc.assoc_id == id) {
1583                         if (inp != stcb->sctp_ep) {
1584                                 /*
1585                                  * some other guy has the same id active (id
1586                                  * collision ??).
1587                                  */
1588                                 SCTP_PRINTF("TSNH ep_associd2\n");
1589                                 continue;
1590                         }
1591                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1592                                 continue;
1593                         }
1594                         if (want_lock) {
1595                                 SCTP_TCB_LOCK(stcb);
1596                         }
1597                         return (stcb);
1598                 }
1599         }
1600         return (NULL);
1601 }
1602
1603
1604 struct sctp_tcb *
1605 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1606 {
1607         struct sctp_tcb *stcb;
1608
1609         SCTP_INP_RLOCK(inp);
1610         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1611         SCTP_INP_RUNLOCK(inp);
1612         return (stcb);
1613 }
1614
1615
1616 /*
1617  * Endpoint probe expects that the INP_INFO is locked.
1618  */
1619 static struct sctp_inpcb *
1620 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1621     uint16_t lport, uint32_t vrf_id)
1622 {
1623         struct sctp_inpcb *inp;
1624         struct sctp_laddr *laddr;
1625
1626 #ifdef INET
1627         struct sockaddr_in *sin;
1628
1629 #endif
1630 #ifdef INET6
1631         struct sockaddr_in6 *sin6;
1632         struct sockaddr_in6 *intf_addr6;
1633
1634 #endif
1635         int fnd;
1636
1637 #ifdef INET
1638         sin = NULL;
1639 #endif
1640 #ifdef INET6
1641         sin6 = NULL;
1642 #endif
1643         switch (nam->sa_family) {
1644 #ifdef INET
1645         case AF_INET:
1646                 sin = (struct sockaddr_in *)nam;
1647                 break;
1648 #endif
1649 #ifdef INET6
1650         case AF_INET6:
1651                 sin6 = (struct sockaddr_in6 *)nam;
1652                 break;
1653 #endif
1654         default:
1655                 /* unsupported family */
1656                 return (NULL);
1657         }
1658
1659         if (head == NULL)
1660                 return (NULL);
1661
1662         LIST_FOREACH(inp, head, sctp_hash) {
1663                 SCTP_INP_RLOCK(inp);
1664                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1665                         SCTP_INP_RUNLOCK(inp);
1666                         continue;
1667                 }
1668                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1669                     (inp->sctp_lport == lport)) {
1670                         /* got it */
1671                         switch (nam->sa_family) {
1672 #ifdef INET
1673                         case AF_INET:
1674                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1675                                     SCTP_IPV6_V6ONLY(inp)) {
1676                                         /*
1677                                          * IPv4 on a IPv6 socket with ONLY
1678                                          * IPv6 set
1679                                          */
1680                                         SCTP_INP_RUNLOCK(inp);
1681                                         continue;
1682                                 }
1683                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1684                                     &sin->sin_addr) != 0) {
1685                                         SCTP_INP_RUNLOCK(inp);
1686                                         continue;
1687                                 }
1688                                 break;
1689 #endif
1690 #ifdef INET6
1691                         case AF_INET6:
1692                                 /*
1693                                  * A V6 address and the endpoint is NOT
1694                                  * bound V6
1695                                  */
1696                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1697                                         SCTP_INP_RUNLOCK(inp);
1698                                         continue;
1699                                 }
1700                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1701                                     &sin6->sin6_addr) != 0) {
1702                                         SCTP_INP_RUNLOCK(inp);
1703                                         continue;
1704                                 }
1705                                 break;
1706 #endif
1707                         default:
1708                                 break;
1709                         }
1710                         /* does a VRF id match? */
1711                         fnd = 0;
1712                         if (inp->def_vrf_id == vrf_id)
1713                                 fnd = 1;
1714
1715                         SCTP_INP_RUNLOCK(inp);
1716                         if (!fnd)
1717                                 continue;
1718                         return (inp);
1719                 }
1720                 SCTP_INP_RUNLOCK(inp);
1721         }
1722         switch (nam->sa_family) {
1723 #ifdef INET
1724         case AF_INET:
1725                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1726                         /* Can't hunt for one that has no address specified */
1727                         return (NULL);
1728                 }
1729                 break;
1730 #endif
1731 #ifdef INET6
1732         case AF_INET6:
1733                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1734                         /* Can't hunt for one that has no address specified */
1735                         return (NULL);
1736                 }
1737                 break;
1738 #endif
1739         default:
1740                 break;
1741         }
1742         /*
1743          * ok, not bound to all so see if we can find a EP bound to this
1744          * address.
1745          */
1746         LIST_FOREACH(inp, head, sctp_hash) {
1747                 SCTP_INP_RLOCK(inp);
1748                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1749                         SCTP_INP_RUNLOCK(inp);
1750                         continue;
1751                 }
1752                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1753                         SCTP_INP_RUNLOCK(inp);
1754                         continue;
1755                 }
1756                 /*
1757                  * Ok this could be a likely candidate, look at all of its
1758                  * addresses
1759                  */
1760                 if (inp->sctp_lport != lport) {
1761                         SCTP_INP_RUNLOCK(inp);
1762                         continue;
1763                 }
1764                 /* does a VRF id match? */
1765                 fnd = 0;
1766                 if (inp->def_vrf_id == vrf_id)
1767                         fnd = 1;
1768
1769                 if (!fnd) {
1770                         SCTP_INP_RUNLOCK(inp);
1771                         continue;
1772                 }
1773                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1774                         if (laddr->ifa == NULL) {
1775                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1776                                     __func__);
1777                                 continue;
1778                         }
1779                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1780                             (void *)laddr->ifa);
1781                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1782                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1783                                 continue;
1784                         }
1785                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1786                                 /* possible, see if it matches */
1787                                 switch (nam->sa_family) {
1788 #ifdef INET
1789                                 case AF_INET:
1790                                         if (sin->sin_addr.s_addr ==
1791                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1792                                                 SCTP_INP_RUNLOCK(inp);
1793                                                 return (inp);
1794                                         }
1795                                         break;
1796 #endif
1797 #ifdef INET6
1798                                 case AF_INET6:
1799                                         intf_addr6 = &laddr->ifa->address.sin6;
1800                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1801                                             intf_addr6)) {
1802                                                 SCTP_INP_RUNLOCK(inp);
1803                                                 return (inp);
1804                                         }
1805                                         break;
1806 #endif
1807                                 }
1808                         }
1809                 }
1810                 SCTP_INP_RUNLOCK(inp);
1811         }
1812         return (NULL);
1813 }
1814
1815
1816 static struct sctp_inpcb *
1817 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1818 {
1819         struct sctppcbhead *head;
1820         struct sctp_inpcb *t_inp;
1821         int fnd;
1822
1823         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1824             SCTP_BASE_INFO(hashmark))];
1825         LIST_FOREACH(t_inp, head, sctp_hash) {
1826                 if (t_inp->sctp_lport != lport) {
1827                         continue;
1828                 }
1829                 /* is it in the VRF in question */
1830                 fnd = 0;
1831                 if (t_inp->def_vrf_id == vrf_id)
1832                         fnd = 1;
1833                 if (!fnd)
1834                         continue;
1835
1836                 /* This one is in use. */
1837                 /* check the v6/v4 binding issue */
1838                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1839                     SCTP_IPV6_V6ONLY(t_inp)) {
1840                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1841                                 /* collision in V6 space */
1842                                 return (t_inp);
1843                         } else {
1844                                 /* inp is BOUND_V4 no conflict */
1845                                 continue;
1846                         }
1847                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1848                         /* t_inp is bound v4 and v6, conflict always */
1849                         return (t_inp);
1850                 } else {
1851                         /* t_inp is bound only V4 */
1852                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1853                             SCTP_IPV6_V6ONLY(inp)) {
1854                                 /* no conflict */
1855                                 continue;
1856                         }
1857                         /* else fall through to conflict */
1858                 }
1859                 return (t_inp);
1860         }
1861         return (NULL);
1862 }
1863
1864
1865 int
1866 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1867 {
1868         /* For 1-2-1 with port reuse */
1869         struct sctppcbhead *head;
1870         struct sctp_inpcb *tinp, *ninp;
1871
1872         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1873                 /* only works with port reuse on */
1874                 return (-1);
1875         }
1876         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1877                 return (0);
1878         }
1879         SCTP_INP_RUNLOCK(inp);
1880         SCTP_INP_INFO_WLOCK();
1881         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1882             SCTP_BASE_INFO(hashmark))];
1883         /* Kick out all non-listeners to the TCP hash */
1884         LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1885                 if (tinp->sctp_lport != inp->sctp_lport) {
1886                         continue;
1887                 }
1888                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1889                         continue;
1890                 }
1891                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1892                         continue;
1893                 }
1894                 if (tinp->sctp_socket->so_qlimit) {
1895                         continue;
1896                 }
1897                 SCTP_INP_WLOCK(tinp);
1898                 LIST_REMOVE(tinp, sctp_hash);
1899                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1900                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1901                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1902                 SCTP_INP_WUNLOCK(tinp);
1903         }
1904         SCTP_INP_WLOCK(inp);
1905         /* Pull from where he was */
1906         LIST_REMOVE(inp, sctp_hash);
1907         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1908         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1909         LIST_INSERT_HEAD(head, inp, sctp_hash);
1910         SCTP_INP_WUNLOCK(inp);
1911         SCTP_INP_RLOCK(inp);
1912         SCTP_INP_INFO_WUNLOCK();
1913         return (0);
1914 }
1915
1916
1917 struct sctp_inpcb *
1918 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1919     uint32_t vrf_id)
1920 {
1921         /*
1922          * First we check the hash table to see if someone has this port
1923          * bound with just the port.
1924          */
1925         struct sctp_inpcb *inp;
1926         struct sctppcbhead *head;
1927         int lport;
1928         unsigned int i;
1929
1930 #ifdef INET
1931         struct sockaddr_in *sin;
1932
1933 #endif
1934 #ifdef INET6
1935         struct sockaddr_in6 *sin6;
1936
1937 #endif
1938
1939         switch (nam->sa_family) {
1940 #ifdef INET
1941         case AF_INET:
1942                 sin = (struct sockaddr_in *)nam;
1943                 lport = sin->sin_port;
1944                 break;
1945 #endif
1946 #ifdef INET6
1947         case AF_INET6:
1948                 sin6 = (struct sockaddr_in6 *)nam;
1949                 lport = sin6->sin6_port;
1950                 break;
1951 #endif
1952         default:
1953                 return (NULL);
1954         }
1955         /*
1956          * I could cheat here and just cast to one of the types but we will
1957          * do it right. It also provides the check against an Unsupported
1958          * type too.
1959          */
1960         /* Find the head of the ALLADDR chain */
1961         if (have_lock == 0) {
1962                 SCTP_INP_INFO_RLOCK();
1963         }
1964         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1965             SCTP_BASE_INFO(hashmark))];
1966         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1967
1968         /*
1969          * If the TCP model exists it could be that the main listening
1970          * endpoint is gone but there still exists a connected socket for
1971          * this guy. If so we can return the first one that we find. This
1972          * may NOT be the correct one so the caller should be wary on the
1973          * returned INP. Currently the only caller that sets find_tcp_pool
1974          * is in bindx where we are verifying that a user CAN bind the
1975          * address. He either has bound it already, or someone else has, or
1976          * its open to bind, so this is good enough.
1977          */
1978         if (inp == NULL && find_tcp_pool) {
1979                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1980                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1981                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1982                         if (inp) {
1983                                 break;
1984                         }
1985                 }
1986         }
1987         if (inp) {
1988                 SCTP_INP_INCR_REF(inp);
1989         }
1990         if (have_lock == 0) {
1991                 SCTP_INP_INFO_RUNLOCK();
1992         }
1993         return (inp);
1994 }
1995
1996
1997 /*
1998  * Find an association for an endpoint with the pointer to whom you want to
1999  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
2000  * need to change the *to to some other struct like a mbuf...
2001  */
2002 struct sctp_tcb *
2003 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
2004     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
2005     uint32_t vrf_id)
2006 {
2007         struct sctp_inpcb *inp = NULL;
2008         struct sctp_tcb *stcb;
2009
2010         SCTP_INP_INFO_RLOCK();
2011         if (find_tcp_pool) {
2012                 if (inp_p != NULL) {
2013                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2014                             vrf_id);
2015                 } else {
2016                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2017                             vrf_id);
2018                 }
2019                 if (stcb != NULL) {
2020                         SCTP_INP_INFO_RUNLOCK();
2021                         return (stcb);
2022                 }
2023         }
2024         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2025         if (inp_p != NULL) {
2026                 *inp_p = inp;
2027         }
2028         SCTP_INP_INFO_RUNLOCK();
2029         if (inp == NULL) {
2030                 return (NULL);
2031         }
2032         /*
2033          * ok, we have an endpoint, now lets find the assoc for it (if any)
2034          * we now place the source address or from in the to of the find
2035          * endpoint call. Since in reality this chain is used from the
2036          * inbound packet side.
2037          */
2038         if (inp_p != NULL) {
2039                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2040                     NULL);
2041         } else {
2042                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2043                     NULL);
2044         }
2045         return (stcb);
2046 }
2047
2048
2049 /*
2050  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2051  * find all addresses that the sender has specified in any address list. Each
2052  * address will be used to lookup the TCB and see if one exits.
2053  */
2054 static struct sctp_tcb *
2055 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2056     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2057     struct sockaddr *dst)
2058 {
2059         struct sctp_paramhdr *phdr, parm_buf;
2060
2061 #if defined(INET) || defined(INET6)
2062         struct sctp_tcb *stcb;
2063         uint16_t ptype;
2064
2065 #endif
2066         uint16_t plen;
2067
2068 #ifdef INET
2069         struct sockaddr_in sin4;
2070
2071 #endif
2072 #ifdef INET6
2073         struct sockaddr_in6 sin6;
2074
2075 #endif
2076
2077 #ifdef INET
2078         memset(&sin4, 0, sizeof(sin4));
2079         sin4.sin_len = sizeof(sin4);
2080         sin4.sin_family = AF_INET;
2081         sin4.sin_port = sh->src_port;
2082 #endif
2083 #ifdef INET6
2084         memset(&sin6, 0, sizeof(sin6));
2085         sin6.sin6_len = sizeof(sin6);
2086         sin6.sin6_family = AF_INET6;
2087         sin6.sin6_port = sh->src_port;
2088 #endif
2089
2090         offset += sizeof(struct sctp_init_chunk);
2091
2092         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
2093         while (phdr != NULL) {
2094                 /* now we must see if we want the parameter */
2095 #if defined(INET) || defined(INET6)
2096                 ptype = ntohs(phdr->param_type);
2097 #endif
2098                 plen = ntohs(phdr->param_length);
2099                 if (plen == 0) {
2100                         break;
2101                 }
2102 #ifdef INET
2103                 if (ptype == SCTP_IPV4_ADDRESS &&
2104                     plen == sizeof(struct sctp_ipv4addr_param)) {
2105                         /* Get the rest of the address */
2106                         struct sctp_ipv4addr_param ip4_parm, *p4;
2107
2108                         phdr = sctp_get_next_param(m, offset,
2109                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2110                         if (phdr == NULL) {
2111                                 return (NULL);
2112                         }
2113                         p4 = (struct sctp_ipv4addr_param *)phdr;
2114                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2115                         /* look it up */
2116                         stcb = sctp_findassociation_ep_addr(inp_p,
2117                             (struct sockaddr *)&sin4, netp, dst, NULL);
2118                         if (stcb != NULL) {
2119                                 return (stcb);
2120                         }
2121                 }
2122 #endif
2123 #ifdef INET6
2124                 if (ptype == SCTP_IPV6_ADDRESS &&
2125                     plen == sizeof(struct sctp_ipv6addr_param)) {
2126                         /* Get the rest of the address */
2127                         struct sctp_ipv6addr_param ip6_parm, *p6;
2128
2129                         phdr = sctp_get_next_param(m, offset,
2130                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
2131                         if (phdr == NULL) {
2132                                 return (NULL);
2133                         }
2134                         p6 = (struct sctp_ipv6addr_param *)phdr;
2135                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2136                         /* look it up */
2137                         stcb = sctp_findassociation_ep_addr(inp_p,
2138                             (struct sockaddr *)&sin6, netp, dst, NULL);
2139                         if (stcb != NULL) {
2140                                 return (stcb);
2141                         }
2142                 }
2143 #endif
2144                 offset += SCTP_SIZE32(plen);
2145                 phdr = sctp_get_next_param(m, offset, &parm_buf,
2146                     sizeof(parm_buf));
2147         }
2148         return (NULL);
2149 }
2150
2151 static struct sctp_tcb *
2152 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2153     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2154     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2155 {
2156         /*
2157          * Use my vtag to hash. If we find it we then verify the source addr
2158          * is in the assoc. If all goes well we save a bit on rec of a
2159          * packet.
2160          */
2161         struct sctpasochead *head;
2162         struct sctp_nets *net;
2163         struct sctp_tcb *stcb;
2164
2165         SCTP_INP_INFO_RLOCK();
2166         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2167             SCTP_BASE_INFO(hashasocmark))];
2168         LIST_FOREACH(stcb, head, sctp_asocs) {
2169                 SCTP_INP_RLOCK(stcb->sctp_ep);
2170                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2171                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2172                         continue;
2173                 }
2174                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2175                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2176                         continue;
2177                 }
2178                 SCTP_TCB_LOCK(stcb);
2179                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2180                 if (stcb->asoc.my_vtag == vtag) {
2181                         /* candidate */
2182                         if (stcb->rport != rport) {
2183                                 SCTP_TCB_UNLOCK(stcb);
2184                                 continue;
2185                         }
2186                         if (stcb->sctp_ep->sctp_lport != lport) {
2187                                 SCTP_TCB_UNLOCK(stcb);
2188                                 continue;
2189                         }
2190                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2191                                 SCTP_TCB_UNLOCK(stcb);
2192                                 continue;
2193                         }
2194                         /* RRS:Need toaddr check here */
2195                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2196                                 /* Endpoint does not own this address */
2197                                 SCTP_TCB_UNLOCK(stcb);
2198                                 continue;
2199                         }
2200                         if (remote_tag) {
2201                                 /*
2202                                  * If we have both vtags that's all we match
2203                                  * on
2204                                  */
2205                                 if (stcb->asoc.peer_vtag == remote_tag) {
2206                                         /*
2207                                          * If both tags match we consider it
2208                                          * conclusive and check NO
2209                                          * source/destination addresses
2210                                          */
2211                                         goto conclusive;
2212                                 }
2213                         }
2214                         if (skip_src_check) {
2215                 conclusive:
2216                                 if (from) {
2217                                         *netp = sctp_findnet(stcb, from);
2218                                 } else {
2219                                         *netp = NULL;   /* unknown */
2220                                 }
2221                                 if (inp_p)
2222                                         *inp_p = stcb->sctp_ep;
2223                                 SCTP_INP_INFO_RUNLOCK();
2224                                 return (stcb);
2225                         }
2226                         net = sctp_findnet(stcb, from);
2227                         if (net) {
2228                                 /* yep its him. */
2229                                 *netp = net;
2230                                 SCTP_STAT_INCR(sctps_vtagexpress);
2231                                 *inp_p = stcb->sctp_ep;
2232                                 SCTP_INP_INFO_RUNLOCK();
2233                                 return (stcb);
2234                         } else {
2235                                 /*
2236                                  * not him, this should only happen in rare
2237                                  * cases so I peg it.
2238                                  */
2239                                 SCTP_STAT_INCR(sctps_vtagbogus);
2240                         }
2241                 }
2242                 SCTP_TCB_UNLOCK(stcb);
2243         }
2244         SCTP_INP_INFO_RUNLOCK();
2245         return (NULL);
2246 }
2247
2248
2249 /*
2250  * Find an association with the pointer to the inbound IP packet. This can be
2251  * a IPv4 or IPv6 packet.
2252  */
2253 struct sctp_tcb *
2254 sctp_findassociation_addr(struct mbuf *m, int offset,
2255     struct sockaddr *src, struct sockaddr *dst,
2256     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2257     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2258 {
2259         int find_tcp_pool;
2260         struct sctp_tcb *stcb;
2261         struct sctp_inpcb *inp;
2262
2263         if (sh->v_tag) {
2264                 /* we only go down this path if vtag is non-zero */
2265                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2266                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2267                 if (stcb) {
2268                         return (stcb);
2269                 }
2270         }
2271         find_tcp_pool = 0;
2272         if ((ch->chunk_type != SCTP_INITIATION) &&
2273             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2274             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2275             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2276                 /* Other chunk types go to the tcp pool. */
2277                 find_tcp_pool = 1;
2278         }
2279         if (inp_p) {
2280                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2281                     find_tcp_pool, vrf_id);
2282                 inp = *inp_p;
2283         } else {
2284                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2285                     find_tcp_pool, vrf_id);
2286         }
2287         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2288         if (stcb == NULL && inp) {
2289                 /* Found a EP but not this address */
2290                 if ((ch->chunk_type == SCTP_INITIATION) ||
2291                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2292                         /*-
2293                          * special hook, we do NOT return linp or an
2294                          * association that is linked to an existing
2295                          * association that is under the TCP pool (i.e. no
2296                          * listener exists). The endpoint finding routine
2297                          * will always find a listener before examining the
2298                          * TCP pool.
2299                          */
2300                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2301                                 if (inp_p) {
2302                                         *inp_p = NULL;
2303                                 }
2304                                 return (NULL);
2305                         }
2306                         stcb = sctp_findassociation_special_addr(m,
2307                             offset, sh, &inp, netp, dst);
2308                         if (inp_p != NULL) {
2309                                 *inp_p = inp;
2310                         }
2311                 }
2312         }
2313         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2314         return (stcb);
2315 }
2316
2317 /*
2318  * lookup an association by an ASCONF lookup address.
2319  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2320  */
2321 struct sctp_tcb *
2322 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2323     struct sockaddr *dst, struct sctphdr *sh,
2324     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2325 {
2326         struct sctp_tcb *stcb;
2327         union sctp_sockstore remote_store;
2328         struct sctp_paramhdr parm_buf, *phdr;
2329         int ptype;
2330         int zero_address = 0;
2331
2332 #ifdef INET
2333         struct sockaddr_in *sin;
2334
2335 #endif
2336 #ifdef INET6
2337         struct sockaddr_in6 *sin6;
2338
2339 #endif
2340
2341         memset(&remote_store, 0, sizeof(remote_store));
2342         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2343             &parm_buf, sizeof(struct sctp_paramhdr));
2344         if (phdr == NULL) {
2345                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2346                     __func__);
2347                 return NULL;
2348         }
2349         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2350         /* get the correlation address */
2351         switch (ptype) {
2352 #ifdef INET6
2353         case SCTP_IPV6_ADDRESS:
2354                 {
2355                         /* ipv6 address param */
2356                         struct sctp_ipv6addr_param *p6, p6_buf;
2357
2358                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2359                                 return NULL;
2360                         }
2361                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2362                             offset + sizeof(struct sctp_asconf_chunk),
2363                             &p6_buf.ph, sizeof(*p6));
2364                         if (p6 == NULL) {
2365                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2366                                     __func__);
2367                                 return (NULL);
2368                         }
2369                         sin6 = &remote_store.sin6;
2370                         sin6->sin6_family = AF_INET6;
2371                         sin6->sin6_len = sizeof(*sin6);
2372                         sin6->sin6_port = sh->src_port;
2373                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2374                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2375                                 zero_address = 1;
2376                         break;
2377                 }
2378 #endif
2379 #ifdef INET
2380         case SCTP_IPV4_ADDRESS:
2381                 {
2382                         /* ipv4 address param */
2383                         struct sctp_ipv4addr_param *p4, p4_buf;
2384
2385                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2386                                 return NULL;
2387                         }
2388                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2389                             offset + sizeof(struct sctp_asconf_chunk),
2390                             &p4_buf.ph, sizeof(*p4));
2391                         if (p4 == NULL) {
2392                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2393                                     __func__);
2394                                 return (NULL);
2395                         }
2396                         sin = &remote_store.sin;
2397                         sin->sin_family = AF_INET;
2398                         sin->sin_len = sizeof(*sin);
2399                         sin->sin_port = sh->src_port;
2400                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2401                         if (sin->sin_addr.s_addr == INADDR_ANY)
2402                                 zero_address = 1;
2403                         break;
2404                 }
2405 #endif
2406         default:
2407                 /* invalid address param type */
2408                 return NULL;
2409         }
2410
2411         if (zero_address) {
2412                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2413                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2414                 if (stcb != NULL) {
2415                         SCTP_INP_DECR_REF(*inp_p);
2416                 }
2417         } else {
2418                 stcb = sctp_findassociation_ep_addr(inp_p,
2419                     &remote_store.sa, netp,
2420                     dst, NULL);
2421         }
2422         return (stcb);
2423 }
2424
2425
2426 /*
2427  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2428  * addresses. This way if we don't get a bind we by default pick a ephemeral
2429  * port with all addresses bound.
2430  */
2431 int
2432 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2433 {
2434         /*
2435          * we get called when a new endpoint starts up. We need to allocate
2436          * the sctp_inpcb structure from the zone and init it. Mark it as
2437          * unbound and find a port that we can use as an ephemeral with
2438          * INADDR_ANY. If the user binds later no problem we can then add in
2439          * the specific addresses. And setup the default parameters for the
2440          * EP.
2441          */
2442         int i, error;
2443         struct sctp_inpcb *inp;
2444         struct sctp_pcb *m;
2445         struct timeval time;
2446         sctp_sharedkey_t *null_key;
2447
2448         error = 0;
2449
2450         SCTP_INP_INFO_WLOCK();
2451         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2452         if (inp == NULL) {
2453                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2454                 SCTP_INP_INFO_WUNLOCK();
2455                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2456                 return (ENOBUFS);
2457         }
2458         /* zap it */
2459         bzero(inp, sizeof(*inp));
2460
2461         /* bump generations */
2462         /* setup socket pointers */
2463         inp->sctp_socket = so;
2464         inp->ip_inp.inp.inp_socket = so;
2465         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2466 #ifdef INET6
2467         if (INP_SOCKAF(so) == AF_INET6) {
2468                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2469                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2470                 }
2471                 if (MODULE_GLOBAL(ip6_v6only)) {
2472                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2473                 }
2474         }
2475 #endif
2476         inp->sctp_associd_counter = 1;
2477         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2478         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2479         inp->max_cwnd = 0;
2480         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2481         inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable);
2482         inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable);
2483         inp->auth_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_auth_enable);
2484         inp->asconf_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_asconf_enable);
2485         inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2486         inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2487         inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2488         inp->fibnum = so->so_fibnum;
2489         /* init the small hash table we use to track asocid <-> tcb */
2490         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2491         if (inp->sctp_asocidhash == NULL) {
2492                 crfree(inp->ip_inp.inp.inp_cred);
2493                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2494                 SCTP_INP_INFO_WUNLOCK();
2495                 return (ENOBUFS);
2496         }
2497 #ifdef IPSEC
2498         {
2499                 struct inpcbpolicy *pcb_sp = NULL;
2500
2501                 error = ipsec_init_policy(so, &pcb_sp);
2502                 /* Arrange to share the policy */
2503                 inp->ip_inp.inp.inp_sp = pcb_sp;
2504                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2505         }
2506         if (error != 0) {
2507                 crfree(inp->ip_inp.inp.inp_cred);
2508                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2509                 SCTP_INP_INFO_WUNLOCK();
2510                 return error;
2511         }
2512 #endif                          /* IPSEC */
2513         SCTP_INCR_EP_COUNT();
2514         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2515         SCTP_INP_INFO_WUNLOCK();
2516
2517         so->so_pcb = (caddr_t)inp;
2518
2519         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2520                 /* UDP style socket */
2521                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2522                     SCTP_PCB_FLAGS_UNBOUND);
2523                 /* Be sure it is NON-BLOCKING IO for UDP */
2524                 /* SCTP_SET_SO_NBIO(so); */
2525         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2526                 /* TCP style socket */
2527                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2528                     SCTP_PCB_FLAGS_UNBOUND);
2529                 /* Be sure we have blocking IO by default */
2530                 SCTP_CLEAR_SO_NBIO(so);
2531         } else {
2532                 /*
2533                  * unsupported socket type (RAW, etc)- in case we missed it
2534                  * in protosw
2535                  */
2536                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2537                 so->so_pcb = NULL;
2538                 crfree(inp->ip_inp.inp.inp_cred);
2539                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2540                 return (EOPNOTSUPP);
2541         }
2542         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2543                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2544                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2545         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2546                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2547                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2548         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2549                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2550                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2551         }
2552         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2553             &inp->sctp_hashmark);
2554         if (inp->sctp_tcbhash == NULL) {
2555                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2556                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2557                 so->so_pcb = NULL;
2558                 crfree(inp->ip_inp.inp.inp_cred);
2559                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2560                 return (ENOBUFS);
2561         }
2562         inp->def_vrf_id = vrf_id;
2563
2564         SCTP_INP_INFO_WLOCK();
2565         SCTP_INP_LOCK_INIT(inp);
2566         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2567         SCTP_INP_READ_INIT(inp);
2568         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2569         /* lock the new ep */
2570         SCTP_INP_WLOCK(inp);
2571
2572         /* add it to the info area */
2573         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2574         SCTP_INP_INFO_WUNLOCK();
2575
2576         TAILQ_INIT(&inp->read_queue);
2577         LIST_INIT(&inp->sctp_addr_list);
2578
2579         LIST_INIT(&inp->sctp_asoc_list);
2580
2581 #ifdef SCTP_TRACK_FREED_ASOCS
2582         /* TEMP CODE */
2583         LIST_INIT(&inp->sctp_asoc_free_list);
2584 #endif
2585         /* Init the timer structure for signature change */
2586         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2587         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2588
2589         /* now init the actual endpoint default data */
2590         m = &inp->sctp_ep;
2591
2592         /* setup the base timeout information */
2593         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2594         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2595         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2596         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2597         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2598         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2599         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2600         /* all max/min max are in ms */
2601         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2602         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2603         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2604         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2605         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2606         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2607         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2608         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2609         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2610         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2611         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2612         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2613         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2614
2615         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2616         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2617         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2618         /* number of streams to pre-open on a association */
2619         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2620
2621         /* Add adaptation cookie */
2622         m->adaptation_layer_indicator = 0;
2623         m->adaptation_layer_indicator_provided = 0;
2624
2625         /* seed random number generator */
2626         m->random_counter = 1;
2627         m->store_at = SCTP_SIGNATURE_SIZE;
2628         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2629         sctp_fill_random_store(m);
2630
2631         /* Minimum cookie size */
2632         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2633             sizeof(struct sctp_state_cookie);
2634         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2635
2636         /* Setup the initial secret */
2637         (void)SCTP_GETTIME_TIMEVAL(&time);
2638         m->time_of_secret_change = time.tv_sec;
2639
2640         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2641                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2642         }
2643         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2644
2645         /* How long is a cookie good for ? */
2646         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2647         /*
2648          * Initialize authentication parameters
2649          */
2650         m->local_hmacs = sctp_default_supported_hmaclist();
2651         m->local_auth_chunks = sctp_alloc_chunklist();
2652         if (inp->asconf_supported) {
2653                 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2654                 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2655         }
2656         m->default_dscp = 0;
2657 #ifdef INET6
2658         m->default_flowlabel = 0;
2659 #endif
2660         m->port = 0;            /* encapsulation disabled by default */
2661         LIST_INIT(&m->shared_keys);
2662         /* add default NULL key as key id 0 */
2663         null_key = sctp_alloc_sharedkey();
2664         sctp_insert_sharedkey(&m->shared_keys, null_key);
2665         SCTP_INP_WUNLOCK(inp);
2666 #ifdef SCTP_LOG_CLOSING
2667         sctp_log_closing(inp, NULL, 12);
2668 #endif
2669         return (error);
2670 }
2671
2672
2673 void
2674 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2675     struct sctp_tcb *stcb)
2676 {
2677         struct sctp_nets *net;
2678         uint16_t lport, rport;
2679         struct sctppcbhead *head;
2680         struct sctp_laddr *laddr, *oladdr;
2681
2682         atomic_add_int(&stcb->asoc.refcnt, 1);
2683         SCTP_TCB_UNLOCK(stcb);
2684         SCTP_INP_INFO_WLOCK();
2685         SCTP_INP_WLOCK(old_inp);
2686         SCTP_INP_WLOCK(new_inp);
2687         SCTP_TCB_LOCK(stcb);
2688         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2689
2690         new_inp->sctp_ep.time_of_secret_change =
2691             old_inp->sctp_ep.time_of_secret_change;
2692         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2693             sizeof(old_inp->sctp_ep.secret_key));
2694         new_inp->sctp_ep.current_secret_number =
2695             old_inp->sctp_ep.current_secret_number;
2696         new_inp->sctp_ep.last_secret_number =
2697             old_inp->sctp_ep.last_secret_number;
2698         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2699
2700         /* make it so new data pours into the new socket */
2701         stcb->sctp_socket = new_inp->sctp_socket;
2702         stcb->sctp_ep = new_inp;
2703
2704         /* Copy the port across */
2705         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2706         rport = stcb->rport;
2707         /* Pull the tcb from the old association */
2708         LIST_REMOVE(stcb, sctp_tcbhash);
2709         LIST_REMOVE(stcb, sctp_tcblist);
2710         if (stcb->asoc.in_asocid_hash) {
2711                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2712         }
2713         /* Now insert the new_inp into the TCP connected hash */
2714         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2715
2716         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2717         /* Its safe to access */
2718         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2719
2720         /* Now move the tcb into the endpoint list */
2721         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2722         /*
2723          * Question, do we even need to worry about the ep-hash since we
2724          * only have one connection? Probably not :> so lets get rid of it
2725          * and not suck up any kernel memory in that.
2726          */
2727         if (stcb->asoc.in_asocid_hash) {
2728                 struct sctpasochead *lhd;
2729
2730                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2731                     new_inp->hashasocidmark)];
2732                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2733         }
2734         /* Ok. Let's restart timer. */
2735         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2736                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2737                     stcb, net);
2738         }
2739
2740         SCTP_INP_INFO_WUNLOCK();
2741         if (new_inp->sctp_tcbhash != NULL) {
2742                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2743                 new_inp->sctp_tcbhash = NULL;
2744         }
2745         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2746                 /* Subset bound, so copy in the laddr list from the old_inp */
2747                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2748                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2749                         if (laddr == NULL) {
2750                                 /*
2751                                  * Gak, what can we do? This assoc is really
2752                                  * HOSED. We probably should send an abort
2753                                  * here.
2754                                  */
2755                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2756                                 continue;
2757                         }
2758                         SCTP_INCR_LADDR_COUNT();
2759                         bzero(laddr, sizeof(*laddr));
2760                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2761                         laddr->ifa = oladdr->ifa;
2762                         atomic_add_int(&laddr->ifa->refcount, 1);
2763                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2764                             sctp_nxt_addr);
2765                         new_inp->laddr_count++;
2766                         if (oladdr == stcb->asoc.last_used_address) {
2767                                 stcb->asoc.last_used_address = laddr;
2768                         }
2769                 }
2770         }
2771         /*
2772          * Now any running timers need to be adjusted since we really don't
2773          * care if they are running or not just blast in the new_inp into
2774          * all of them.
2775          */
2776
2777         stcb->asoc.dack_timer.ep = (void *)new_inp;
2778         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2779         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2780         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2781         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2782         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2783         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2784         /* now what about the nets? */
2785         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2786                 net->pmtu_timer.ep = (void *)new_inp;
2787                 net->hb_timer.ep = (void *)new_inp;
2788                 net->rxt_timer.ep = (void *)new_inp;
2789         }
2790         SCTP_INP_WUNLOCK(new_inp);
2791         SCTP_INP_WUNLOCK(old_inp);
2792 }
2793
2794
2795
2796
2797 /* sctp_ifap is used to bypass normal local address validation checks */
2798 int
2799 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2800     struct sctp_ifa *sctp_ifap, struct thread *p)
2801 {
2802         /* bind a ep to a socket address */
2803         struct sctppcbhead *head;
2804         struct sctp_inpcb *inp, *inp_tmp;
2805         struct inpcb *ip_inp;
2806         int port_reuse_active = 0;
2807         int bindall;
2808         uint16_t lport;
2809         int error;
2810         uint32_t vrf_id;
2811
2812         lport = 0;
2813         bindall = 1;
2814         inp = (struct sctp_inpcb *)so->so_pcb;
2815         ip_inp = (struct inpcb *)so->so_pcb;
2816 #ifdef SCTP_DEBUG
2817         if (addr) {
2818                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2819                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2820                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2821                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2822         }
2823 #endif
2824         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2825                 /* already did a bind, subsequent binds NOT allowed ! */
2826                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2827                 return (EINVAL);
2828         }
2829 #ifdef INVARIANTS
2830         if (p == NULL)
2831                 panic("null proc/thread");
2832 #endif
2833         if (addr != NULL) {
2834                 switch (addr->sa_family) {
2835 #ifdef INET
2836                 case AF_INET:
2837                         {
2838                                 struct sockaddr_in *sin;
2839
2840                                 /* IPV6_V6ONLY socket? */
2841                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2842                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2843                                         return (EINVAL);
2844                                 }
2845                                 if (addr->sa_len != sizeof(*sin)) {
2846                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2847                                         return (EINVAL);
2848                                 }
2849                                 sin = (struct sockaddr_in *)addr;
2850                                 lport = sin->sin_port;
2851                                 /*
2852                                  * For LOOPBACK the prison_local_ip4() call
2853                                  * will transmute the ip address to the
2854                                  * proper value.
2855                                  */
2856                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2857                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2858                                         return (error);
2859                                 }
2860                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2861                                         bindall = 0;
2862                                 }
2863                                 break;
2864                         }
2865 #endif
2866 #ifdef INET6
2867                 case AF_INET6:
2868                         {
2869                                 /*
2870                                  * Only for pure IPv6 Address. (No IPv4
2871                                  * Mapped!)
2872                                  */
2873                                 struct sockaddr_in6 *sin6;
2874
2875                                 sin6 = (struct sockaddr_in6 *)addr;
2876
2877                                 if (addr->sa_len != sizeof(*sin6)) {
2878                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2879                                         return (EINVAL);
2880                                 }
2881                                 lport = sin6->sin6_port;
2882                                 /*
2883                                  * For LOOPBACK the prison_local_ip6() call
2884                                  * will transmute the ipv6 address to the
2885                                  * proper value.
2886                                  */
2887                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2888                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2889                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2890                                         return (error);
2891                                 }
2892                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2893                                         bindall = 0;
2894                                         /* KAME hack: embed scopeid */
2895                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2896                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2897                                                 return (EINVAL);
2898                                         }
2899                                 }
2900                                 /* this must be cleared for ifa_ifwithaddr() */
2901                                 sin6->sin6_scope_id = 0;
2902                                 break;
2903                         }
2904 #endif
2905                 default:
2906                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2907                         return (EAFNOSUPPORT);
2908                 }
2909         }
2910         SCTP_INP_INFO_WLOCK();
2911         SCTP_INP_WLOCK(inp);
2912         /* Setup a vrf_id to be the default for the non-bind-all case. */
2913         vrf_id = inp->def_vrf_id;
2914
2915         /* increase our count due to the unlock we do */
2916         SCTP_INP_INCR_REF(inp);
2917         if (lport) {
2918                 /*
2919                  * Did the caller specify a port? if so we must see if an ep
2920                  * already has this one bound.
2921                  */
2922                 /* got to be root to get at low ports */
2923                 if (ntohs(lport) < IPPORT_RESERVED) {
2924                         if (p && (error =
2925                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2926                             )) {
2927                                 SCTP_INP_DECR_REF(inp);
2928                                 SCTP_INP_WUNLOCK(inp);
2929                                 SCTP_INP_INFO_WUNLOCK();
2930                                 return (error);
2931                         }
2932                 }
2933                 SCTP_INP_WUNLOCK(inp);
2934                 if (bindall) {
2935                         vrf_id = inp->def_vrf_id;
2936                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2937                         if (inp_tmp != NULL) {
2938                                 /*
2939                                  * lock guy returned and lower count note
2940                                  * that we are not bound so inp_tmp should
2941                                  * NEVER be inp. And it is this inp
2942                                  * (inp_tmp) that gets the reference bump,
2943                                  * so we must lower it.
2944                                  */
2945                                 SCTP_INP_DECR_REF(inp_tmp);
2946                                 /* unlock info */
2947                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2948                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2949                                         /*
2950                                          * Ok, must be one-2-one and
2951                                          * allowing port re-use
2952                                          */
2953                                         port_reuse_active = 1;
2954                                         goto continue_anyway;
2955                                 }
2956                                 SCTP_INP_DECR_REF(inp);
2957                                 SCTP_INP_INFO_WUNLOCK();
2958                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2959                                 return (EADDRINUSE);
2960                         }
2961                 } else {
2962                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2963                         if (inp_tmp != NULL) {
2964                                 /*
2965                                  * lock guy returned and lower count note
2966                                  * that we are not bound so inp_tmp should
2967                                  * NEVER be inp. And it is this inp
2968                                  * (inp_tmp) that gets the reference bump,
2969                                  * so we must lower it.
2970                                  */
2971                                 SCTP_INP_DECR_REF(inp_tmp);
2972                                 /* unlock info */
2973                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2974                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2975                                         /*
2976                                          * Ok, must be one-2-one and
2977                                          * allowing port re-use
2978                                          */
2979                                         port_reuse_active = 1;
2980                                         goto continue_anyway;
2981                                 }
2982                                 SCTP_INP_DECR_REF(inp);
2983                                 SCTP_INP_INFO_WUNLOCK();
2984                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2985                                 return (EADDRINUSE);
2986                         }
2987                 }
2988 continue_anyway:
2989                 SCTP_INP_WLOCK(inp);
2990                 if (bindall) {
2991                         /* verify that no lport is not used by a singleton */
2992                         if ((port_reuse_active == 0) &&
2993                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
2994                                 /* Sorry someone already has this one bound */
2995                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2996                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2997                                         port_reuse_active = 1;
2998                                 } else {
2999                                         SCTP_INP_DECR_REF(inp);
3000                                         SCTP_INP_WUNLOCK(inp);
3001                                         SCTP_INP_INFO_WUNLOCK();
3002                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3003                                         return (EADDRINUSE);
3004                                 }
3005                         }
3006                 }
3007         } else {
3008                 uint16_t first, last, candidate;
3009                 uint16_t count;
3010                 int done;
3011
3012                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3013                         first = MODULE_GLOBAL(ipport_hifirstauto);
3014                         last = MODULE_GLOBAL(ipport_hilastauto);
3015                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3016                         if (p && (error =
3017                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3018                             )) {
3019                                 SCTP_INP_DECR_REF(inp);
3020                                 SCTP_INP_WUNLOCK(inp);
3021                                 SCTP_INP_INFO_WUNLOCK();
3022                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3023                                 return (error);
3024                         }
3025                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3026                         last = MODULE_GLOBAL(ipport_lowlastauto);
3027                 } else {
3028                         first = MODULE_GLOBAL(ipport_firstauto);
3029                         last = MODULE_GLOBAL(ipport_lastauto);
3030                 }
3031                 if (first > last) {
3032                         uint16_t temp;
3033
3034                         temp = first;
3035                         first = last;
3036                         last = temp;
3037                 }
3038                 count = last - first + 1;       /* number of candidates */
3039                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3040
3041                 done = 0;
3042                 while (!done) {
3043                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3044                                 done = 1;
3045                         }
3046                         if (!done) {
3047                                 if (--count == 0) {
3048                                         SCTP_INP_DECR_REF(inp);
3049                                         SCTP_INP_WUNLOCK(inp);
3050                                         SCTP_INP_INFO_WUNLOCK();
3051                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3052                                         return (EADDRINUSE);
3053                                 }
3054                                 if (candidate == last)
3055                                         candidate = first;
3056                                 else
3057                                         candidate = candidate + 1;
3058                         }
3059                 }
3060                 lport = htons(candidate);
3061         }
3062         SCTP_INP_DECR_REF(inp);
3063         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3064             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3065                 /*
3066                  * this really should not happen. The guy did a non-blocking
3067                  * bind and then did a close at the same time.
3068                  */
3069                 SCTP_INP_WUNLOCK(inp);
3070                 SCTP_INP_INFO_WUNLOCK();
3071                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3072                 return (EINVAL);
3073         }
3074         /* ok we look clear to give out this port, so lets setup the binding */
3075         if (bindall) {
3076                 /* binding to all addresses, so just set in the proper flags */
3077                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3078                 /* set the automatic addr changes from kernel flag */
3079                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3080                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3081                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3082                 } else {
3083                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3084                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3085                 }
3086                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3087                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3088                 } else {
3089                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3090                 }
3091                 /*
3092                  * set the automatic mobility_base from kernel flag (by
3093                  * micchie)
3094                  */
3095                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3096                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3097                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3098                 } else {
3099                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3100                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3101                 }
3102                 /*
3103                  * set the automatic mobility_fasthandoff from kernel flag
3104                  * (by micchie)
3105                  */
3106                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3107                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3108                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3109                 } else {
3110                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3111                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3112                 }
3113         } else {
3114                 /*
3115                  * bind specific, make sure flags is off and add a new
3116                  * address structure to the sctp_addr_list inside the ep
3117                  * structure.
3118                  *
3119                  * We will need to allocate one and insert it at the head. The
3120                  * socketopt call can just insert new addresses in there as
3121                  * well. It will also have to do the embed scope kame hack
3122                  * too (before adding).
3123                  */
3124                 struct sctp_ifa *ifa;
3125                 union sctp_sockstore store;
3126
3127                 memset(&store, 0, sizeof(store));
3128                 switch (addr->sa_family) {
3129 #ifdef INET
3130                 case AF_INET:
3131                         memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3132                         store.sin.sin_port = 0;
3133                         break;
3134 #endif
3135 #ifdef INET6
3136                 case AF_INET6:
3137                         memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3138                         store.sin6.sin6_port = 0;
3139                         break;
3140 #endif
3141                 default:
3142                         break;
3143                 }
3144                 /*
3145                  * first find the interface with the bound address need to
3146                  * zero out the port to find the address! yuck! can't do
3147                  * this earlier since need port for sctp_pcb_findep()
3148                  */
3149                 if (sctp_ifap != NULL) {
3150                         ifa = sctp_ifap;
3151                 } else {
3152                         /*
3153                          * Note for BSD we hit here always other O/S's will
3154                          * pass things in via the sctp_ifap argument
3155                          * (Panda).
3156                          */
3157                         ifa = sctp_find_ifa_by_addr(&store.sa,
3158                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3159                 }
3160                 if (ifa == NULL) {
3161                         /* Can't find an interface with that address */
3162                         SCTP_INP_WUNLOCK(inp);
3163                         SCTP_INP_INFO_WUNLOCK();
3164                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3165                         return (EADDRNOTAVAIL);
3166                 }
3167 #ifdef INET6
3168                 if (addr->sa_family == AF_INET6) {
3169                         /* GAK, more FIXME IFA lock? */
3170                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3171                                 /* Can't bind a non-existent addr. */
3172                                 SCTP_INP_WUNLOCK(inp);
3173                                 SCTP_INP_INFO_WUNLOCK();
3174                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3175                                 return (EINVAL);
3176                         }
3177                 }
3178 #endif
3179                 /* we're not bound all */
3180                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3181                 /* allow bindx() to send ASCONF's for binding changes */
3182                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3183                 /* clear automatic addr changes from kernel flag */
3184                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3185
3186                 /* add this address to the endpoint list */
3187                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3188                 if (error != 0) {
3189                         SCTP_INP_WUNLOCK(inp);
3190                         SCTP_INP_INFO_WUNLOCK();
3191                         return (error);
3192                 }
3193                 inp->laddr_count++;
3194         }
3195         /* find the bucket */
3196         if (port_reuse_active) {
3197                 /* Put it into tcp 1-2-1 hash */
3198                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3199                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3200         } else {
3201                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3202         }
3203         /* put it in the bucket */
3204         LIST_INSERT_HEAD(head, inp, sctp_hash);
3205         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3206             (void *)head, ntohs(lport), port_reuse_active);
3207         /* set in the port */
3208         inp->sctp_lport = lport;
3209
3210         /* turn off just the unbound flag */
3211         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3212         SCTP_INP_WUNLOCK(inp);
3213         SCTP_INP_INFO_WUNLOCK();
3214         return (0);
3215 }
3216
3217
3218 static void
3219 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3220 {
3221         struct sctp_iterator *it, *nit;
3222
3223         /*
3224          * We enter with the only the ITERATOR_LOCK in place and a write
3225          * lock on the inp_info stuff.
3226          */
3227         it = sctp_it_ctl.cur_it;
3228         if (it && (it->vn != curvnet)) {
3229                 /* Its not looking at our VNET */
3230                 return;
3231         }
3232         if (it && (it->inp == inp)) {
3233                 /*
3234                  * This is tricky and we hold the iterator lock, but when it
3235                  * returns and gets the lock (when we release it) the
3236                  * iterator will try to operate on inp. We need to stop that
3237                  * from happening. But of course the iterator has a
3238                  * reference on the stcb and inp. We can mark it and it will
3239                  * stop.
3240                  *
3241                  * If its a single iterator situation, we set the end iterator
3242                  * flag. Otherwise we set the iterator to go to the next
3243                  * inp.
3244                  *
3245                  */
3246                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3247                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3248                 } else {
3249                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3250                 }
3251         }
3252         /*
3253          * Now go through and remove any single reference to our inp that
3254          * may be still pending on the list
3255          */
3256         SCTP_IPI_ITERATOR_WQ_LOCK();
3257         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3258                 if (it->vn != curvnet) {
3259                         continue;
3260                 }
3261                 if (it->inp == inp) {
3262                         /* This one points to me is it inp specific? */
3263                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3264                                 /* Remove and free this one */
3265                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3266                                     it, sctp_nxt_itr);
3267                                 if (it->function_atend != NULL) {
3268                                         (*it->function_atend) (it->pointer, it->val);
3269                                 }
3270                                 SCTP_FREE(it, SCTP_M_ITER);
3271                         } else {
3272                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3273                                 if (it->inp) {
3274                                         SCTP_INP_INCR_REF(it->inp);
3275                                 }
3276                         }
3277                         /*
3278                          * When its put in the refcnt is incremented so decr
3279                          * it
3280                          */
3281                         SCTP_INP_DECR_REF(inp);
3282                 }
3283         }
3284         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3285 }
3286
3287 /* release sctp_inpcb unbind the port */
3288 void
3289 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3290 {
3291         /*
3292          * Here we free a endpoint. We must find it (if it is in the Hash
3293          * table) and remove it from there. Then we must also find it in the
3294          * overall list and remove it from there. After all removals are
3295          * complete then any timer has to be stopped. Then start the actual
3296          * freeing. a) Any local lists. b) Any associations. c) The hash of
3297          * all associations. d) finally the ep itself.
3298          */
3299         struct sctp_tcb *asoc, *nasoc;
3300         struct sctp_laddr *laddr, *nladdr;
3301         struct inpcb *ip_pcb;
3302         struct socket *so;
3303         int being_refed = 0;
3304         struct sctp_queued_to_read *sq, *nsq;
3305         int cnt;
3306         sctp_sharedkey_t *shared_key, *nshared_key;
3307
3308
3309 #ifdef SCTP_LOG_CLOSING
3310         sctp_log_closing(inp, NULL, 0);
3311 #endif
3312         SCTP_ITERATOR_LOCK();
3313         /* mark any iterators on the list or being processed */
3314         sctp_iterator_inp_being_freed(inp);
3315         SCTP_ITERATOR_UNLOCK();
3316         so = inp->sctp_socket;
3317         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3318                 /* been here before.. eeks.. get out of here */
3319                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3320 #ifdef SCTP_LOG_CLOSING
3321                 sctp_log_closing(inp, NULL, 1);
3322 #endif
3323                 return;
3324         }
3325         SCTP_ASOC_CREATE_LOCK(inp);
3326         SCTP_INP_INFO_WLOCK();
3327
3328         SCTP_INP_WLOCK(inp);
3329         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3330                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3331                 /* socket is gone, so no more wakeups allowed */
3332                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3333                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3334                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3335
3336         }
3337         /* First time through we have the socket lock, after that no more. */
3338         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3339             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3340
3341         if (inp->control) {
3342                 sctp_m_freem(inp->control);
3343                 inp->control = NULL;
3344         }
3345         if (inp->pkt) {
3346                 sctp_m_freem(inp->pkt);
3347                 inp->pkt = NULL;
3348         }
3349         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3350                                          * here but I will be nice :> (i.e.
3351                                          * ip_pcb = ep;) */
3352         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3353                 int cnt_in_sd;
3354
3355                 cnt_in_sd = 0;
3356                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3357                         SCTP_TCB_LOCK(asoc);
3358                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3359                                 /* Skip guys being freed */
3360                                 cnt_in_sd++;
3361                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3362                                         /*
3363                                          * Special case - we did not start a
3364                                          * kill timer on the asoc due to it
3365                                          * was not closed. So go ahead and
3366                                          * start it now.
3367                                          */
3368                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3369                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3370                                 }
3371                                 SCTP_TCB_UNLOCK(asoc);
3372                                 continue;
3373                         }
3374                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3375                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3376                             (asoc->asoc.total_output_queue_size == 0)) {
3377                                 /*
3378                                  * If we have data in queue, we don't want
3379                                  * to just free since the app may have done,
3380                                  * send()/close or connect/send/close. And
3381                                  * it wants the data to get across first.
3382                                  */
3383                                 /* Just abandon things in the front states */
3384                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3385                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3386                                         cnt_in_sd++;
3387                                 }
3388                                 continue;
3389                         }
3390                         /* Disconnect the socket please */
3391                         asoc->sctp_socket = NULL;
3392                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3393                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3394                             (asoc->asoc.control_pdapi) ||
3395                             (asoc->asoc.size_on_all_streams > 0) ||
3396                             (so && (so->so_rcv.sb_cc > 0))) {
3397                                 /* Left with Data unread */
3398                                 struct mbuf *op_err;
3399
3400                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3401                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3402                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3403                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3404                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3405                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3406                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3407                                 }
3408                                 if (sctp_free_assoc(inp, asoc,
3409                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3410                                         cnt_in_sd++;
3411                                 }
3412                                 continue;
3413                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3414                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3415                             (asoc->asoc.stream_queue_cnt == 0)) {
3416                                 if (asoc->asoc.locked_on_sending) {
3417                                         goto abort_anyway;
3418                                 }
3419                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3420                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3421                                         struct sctp_nets *netp;
3422
3423                                         /*
3424                                          * there is nothing queued to send,
3425                                          * so I send shutdown
3426                                          */
3427                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3428                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3429                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3430                                         }
3431                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3432                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3433                                         sctp_stop_timers_for_shutdown(asoc);
3434                                         if (asoc->asoc.alternate) {
3435                                                 netp = asoc->asoc.alternate;
3436                                         } else {
3437                                                 netp = asoc->asoc.primary_destination;
3438                                         }
3439                                         sctp_send_shutdown(asoc, netp);
3440                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3441                                             netp);
3442                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3443                                             asoc->asoc.primary_destination);
3444                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3445                                 }
3446                         } else {
3447                                 /* mark into shutdown pending */
3448                                 struct sctp_stream_queue_pending *sp;
3449
3450                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3451                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3452                                     asoc->asoc.primary_destination);
3453                                 if (asoc->asoc.locked_on_sending) {
3454                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3455                                             sctp_streamhead);
3456                                         if (sp == NULL) {
3457                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3458                                                     (void *)asoc->asoc.locked_on_sending,
3459                                                     asoc->asoc.locked_on_sending->stream_no);
3460                                         } else {
3461                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3462                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3463                                         }
3464                                 }
3465                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3466                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3467                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3468                                         struct mbuf *op_err;
3469
3470                         abort_anyway:
3471                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3472                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3473                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3474                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3475                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3476                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3477                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3478                                         }
3479                                         if (sctp_free_assoc(inp, asoc,
3480                                             SCTP_PCBFREE_NOFORCE,
3481                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3482                                                 cnt_in_sd++;
3483                                         }
3484                                         continue;
3485                                 } else {
3486                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3487                                 }
3488                         }
3489                         cnt_in_sd++;
3490                         SCTP_TCB_UNLOCK(asoc);
3491                 }
3492                 /* now is there some left in our SHUTDOWN state? */
3493                 if (cnt_in_sd) {
3494 #ifdef SCTP_LOG_CLOSING
3495                         sctp_log_closing(inp, NULL, 2);
3496 #endif
3497                         inp->sctp_socket = NULL;
3498                         SCTP_INP_WUNLOCK(inp);
3499                         SCTP_ASOC_CREATE_UNLOCK(inp);
3500                         SCTP_INP_INFO_WUNLOCK();
3501                         return;
3502                 }
3503         }
3504         inp->sctp_socket = NULL;
3505         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3506             SCTP_PCB_FLAGS_UNBOUND) {
3507                 /*
3508                  * ok, this guy has been bound. It's port is somewhere in
3509                  * the SCTP_BASE_INFO(hash table). Remove it!
3510                  */
3511                 LIST_REMOVE(inp, sctp_hash);
3512                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3513         }
3514         /*
3515          * If there is a timer running to kill us, forget it, since it may
3516          * have a contest on the INP lock.. which would cause us to die ...
3517          */
3518         cnt = 0;
3519         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3520                 SCTP_TCB_LOCK(asoc);
3521                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3522                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3523                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3524                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3525                         }
3526                         cnt++;
3527                         SCTP_TCB_UNLOCK(asoc);
3528                         continue;
3529                 }
3530                 /* Free associations that are NOT killing us */
3531                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3532                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3533                         struct mbuf *op_err;
3534
3535                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3536                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3537                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3538                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3539                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3540                         cnt++;
3541                         SCTP_TCB_UNLOCK(asoc);
3542                         continue;
3543                 }
3544                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3545                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3546                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3547                 }
3548                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3549                     SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3550                         cnt++;
3551                 }
3552         }
3553         if (cnt) {
3554                 /* Ok we have someone out there that will kill us */
3555                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3556 #ifdef SCTP_LOG_CLOSING
3557                 sctp_log_closing(inp, NULL, 3);
3558 #endif
3559                 SCTP_INP_WUNLOCK(inp);
3560                 SCTP_ASOC_CREATE_UNLOCK(inp);
3561                 SCTP_INP_INFO_WUNLOCK();
3562                 return;
3563         }
3564         if (SCTP_INP_LOCK_CONTENDED(inp))
3565                 being_refed++;
3566         if (SCTP_INP_READ_CONTENDED(inp))
3567                 being_refed++;
3568         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3569                 being_refed++;
3570
3571         if ((inp->refcount) ||
3572             (being_refed) ||
3573             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3574                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3575 #ifdef SCTP_LOG_CLOSING
3576                 sctp_log_closing(inp, NULL, 4);
3577 #endif
3578                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3579                 SCTP_INP_WUNLOCK(inp);
3580                 SCTP_ASOC_CREATE_UNLOCK(inp);
3581                 SCTP_INP_INFO_WUNLOCK();
3582                 return;
3583         }
3584         inp->sctp_ep.signature_change.type = 0;
3585         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3586         /*
3587          * Remove it from the list .. last thing we need a lock for.
3588          */
3589         LIST_REMOVE(inp, sctp_list);
3590         SCTP_INP_WUNLOCK(inp);
3591         SCTP_ASOC_CREATE_UNLOCK(inp);
3592         SCTP_INP_INFO_WUNLOCK();
3593         /*
3594          * Now we release all locks. Since this INP cannot be found anymore
3595          * except possibly by the kill timer that might be running. We call
3596          * the drain function here. It should hit the case were it sees the
3597          * ACTIVE flag cleared and exit out freeing us to proceed and
3598          * destroy everything.
3599          */
3600         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3601                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3602         } else {
3603                 /* Probably un-needed */
3604                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3605         }
3606
3607 #ifdef SCTP_LOG_CLOSING
3608         sctp_log_closing(inp, NULL, 5);
3609 #endif
3610
3611
3612         if ((inp->sctp_asocidhash) != NULL) {
3613                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3614                 inp->sctp_asocidhash = NULL;
3615         }
3616         /* sa_ignore FREED_MEMORY */
3617         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3618                 /* Its only abandoned if it had data left */
3619                 if (sq->length)
3620                         SCTP_STAT_INCR(sctps_left_abandon);
3621
3622                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3623                 sctp_free_remote_addr(sq->whoFrom);
3624                 if (so)
3625                         so->so_rcv.sb_cc -= sq->length;
3626                 if (sq->data) {
3627                         sctp_m_freem(sq->data);
3628                         sq->data = NULL;
3629                 }
3630                 /*
3631                  * no need to free the net count, since at this point all
3632                  * assoc's are gone.
3633                  */
3634                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3635                 SCTP_DECR_READQ_COUNT();
3636         }
3637         /* Now the sctp_pcb things */
3638         /*
3639          * free each asoc if it is not already closed/free. we can't use the
3640          * macro here since le_next will get freed as part of the
3641          * sctp_free_assoc() call.
3642          */
3643         if (so) {
3644 #ifdef IPSEC
3645                 ipsec_delete_pcbpolicy(ip_pcb);
3646 #endif                          /* IPSEC */
3647
3648                 /* Unlocks not needed since the socket is gone now */
3649         }
3650         if (ip_pcb->inp_options) {
3651                 (void)sctp_m_free(ip_pcb->inp_options);
3652                 ip_pcb->inp_options = 0;
3653         }
3654 #ifdef INET6
3655         if (ip_pcb->inp_vflag & INP_IPV6) {
3656                 struct in6pcb *in6p;
3657
3658                 in6p = (struct in6pcb *)inp;
3659                 ip6_freepcbopts(in6p->in6p_outputopts);
3660         }
3661 #endif                          /* INET6 */
3662         ip_pcb->inp_vflag = 0;
3663         /* free up authentication fields */
3664         if (inp->sctp_ep.local_auth_chunks != NULL)
3665                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3666         if (inp->sctp_ep.local_hmacs != NULL)
3667                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3668
3669         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3670                 LIST_REMOVE(shared_key, next);
3671                 sctp_free_sharedkey(shared_key);
3672                 /* sa_ignore FREED_MEMORY */
3673         }
3674
3675         /*
3676          * if we have an address list the following will free the list of
3677          * ifaddr's that are set into this ep. Again macro limitations here,
3678          * since the LIST_FOREACH could be a bad idea.
3679          */
3680         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3681                 sctp_remove_laddr(laddr);
3682         }
3683
3684 #ifdef SCTP_TRACK_FREED_ASOCS
3685         /* TEMP CODE */
3686         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3687                 LIST_REMOVE(asoc, sctp_tcblist);
3688                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3689                 SCTP_DECR_ASOC_COUNT();
3690         }
3691         /* *** END TEMP CODE *** */
3692 #endif
3693         /* Now lets see about freeing the EP hash table. */
3694         if (inp->sctp_tcbhash != NULL) {
3695                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3696                 inp->sctp_tcbhash = NULL;
3697         }
3698         /* Now we must put the ep memory back into the zone pool */
3699         crfree(inp->ip_inp.inp.inp_cred);
3700         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3701         SCTP_INP_LOCK_DESTROY(inp);
3702         SCTP_INP_READ_DESTROY(inp);
3703         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3704         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3705         SCTP_DECR_EP_COUNT();
3706 }
3707
3708
3709 struct sctp_nets *
3710 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3711 {
3712         struct sctp_nets *net;
3713
3714         /* locate the address */
3715         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3716                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3717                         return (net);
3718         }
3719         return (NULL);
3720 }
3721
3722
3723 int
3724 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3725 {
3726         struct sctp_ifa *sctp_ifa;
3727
3728         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3729         if (sctp_ifa) {
3730                 return (1);
3731         } else {
3732                 return (0);
3733         }
3734 }
3735
3736 /*
3737  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3738  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3739  * stats of stuff.
3740  */
3741 int
3742 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3743     struct sctp_nets **netp, int set_scope, int from)
3744 {
3745         /*
3746          * The following is redundant to the same lines in the
3747          * sctp_aloc_assoc() but is needed since others call the add address
3748          * function
3749          */
3750         struct sctp_nets *net, *netfirst;
3751         int addr_inscope;
3752
3753         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3754             from);
3755         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3756
3757         netfirst = sctp_findnet(stcb, newaddr);
3758         if (netfirst) {
3759                 /*
3760                  * Lie and return ok, we don't want to make the association
3761                  * go away for this behavior. It will happen in the TCP
3762                  * model in a connected socket. It does not reach the hash
3763                  * table until after the association is built so it can't be
3764                  * found. Mark as reachable, since the initial creation will
3765                  * have been cleared and the NOT_IN_ASSOC flag will have
3766                  * been added... and we don't want to end up removing it
3767                  * back out.
3768                  */
3769                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3770                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3771                             SCTP_ADDR_UNCONFIRMED);
3772                 } else {
3773                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3774                 }
3775
3776                 return (0);
3777         }
3778         addr_inscope = 1;
3779         switch (newaddr->sa_family) {
3780 #ifdef INET
3781         case AF_INET:
3782                 {
3783                         struct sockaddr_in *sin;
3784
3785                         sin = (struct sockaddr_in *)newaddr;
3786                         if (sin->sin_addr.s_addr == 0) {
3787                                 /* Invalid address */
3788                                 return (-1);
3789                         }
3790                         /* zero out the bzero area */
3791                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3792
3793                         /* assure len is set */
3794                         sin->sin_len = sizeof(struct sockaddr_in);
3795                         if (set_scope) {
3796                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3797                                         stcb->asoc.scope.ipv4_local_scope = 1;
3798                                 }
3799                         } else {
3800                                 /* Validate the address is in scope */
3801                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3802                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3803                                         addr_inscope = 0;
3804                                 }
3805                         }
3806                         break;
3807                 }
3808 #endif
3809 #ifdef INET6
3810         case AF_INET6:
3811                 {
3812                         struct sockaddr_in6 *sin6;
3813
3814                         sin6 = (struct sockaddr_in6 *)newaddr;
3815                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3816                                 /* Invalid address */
3817                                 return (-1);
3818                         }
3819                         /* assure len is set */
3820                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3821                         if (set_scope) {
3822                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3823                                         stcb->asoc.scope.loopback_scope = 1;
3824                                         stcb->asoc.scope.local_scope = 0;
3825                                         stcb->asoc.scope.ipv4_local_scope = 1;
3826                                         stcb->asoc.scope.site_scope = 1;
3827                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3828                                         /*
3829                                          * If the new destination is a
3830                                          * LINK_LOCAL we must have common
3831                                          * site scope. Don't set the local
3832                                          * scope since we may not share all
3833                                          * links, only loopback can do this.
3834                                          * Links on the local network would
3835                                          * also be on our private network
3836                                          * for v4 too.
3837                                          */
3838                                         stcb->asoc.scope.ipv4_local_scope = 1;
3839                                         stcb->asoc.scope.site_scope = 1;
3840                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3841                                         /*
3842                                          * If the new destination is
3843                                          * SITE_LOCAL then we must have site
3844                                          * scope in common.
3845                                          */
3846                                         stcb->asoc.scope.site_scope = 1;
3847                                 }
3848                         } else {
3849                                 /* Validate the address is in scope */
3850                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3851                                     (stcb->asoc.scope.loopback_scope == 0)) {
3852                                         addr_inscope = 0;
3853                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3854                                     (stcb->asoc.scope.local_scope == 0)) {
3855                                         addr_inscope = 0;
3856                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3857                                     (stcb->asoc.scope.site_scope == 0)) {
3858                                         addr_inscope = 0;
3859                                 }
3860                         }
3861                         break;
3862                 }
3863 #endif
3864         default:
3865                 /* not supported family type */
3866                 return (-1);
3867         }
3868         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3869         if (net == NULL) {
3870                 return (-1);
3871         }
3872         SCTP_INCR_RADDR_COUNT();
3873         bzero(net, sizeof(struct sctp_nets));
3874         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3875         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3876         switch (newaddr->sa_family) {
3877 #ifdef INET
3878         case AF_INET:
3879                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3880                 break;
3881 #endif
3882 #ifdef INET6
3883         case AF_INET6:
3884                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3885                 break;
3886 #endif
3887         default:
3888                 break;
3889         }
3890         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3891         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3892                 stcb->asoc.scope.loopback_scope = 1;
3893                 stcb->asoc.scope.ipv4_local_scope = 1;
3894                 stcb->asoc.scope.local_scope = 0;
3895                 stcb->asoc.scope.site_scope = 1;
3896                 addr_inscope = 1;
3897         }
3898         net->failure_threshold = stcb->asoc.def_net_failure;
3899         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3900         if (addr_inscope == 0) {
3901                 net->dest_state = (SCTP_ADDR_REACHABLE |
3902                     SCTP_ADDR_OUT_OF_SCOPE);
3903         } else {
3904                 if (from == SCTP_ADDR_IS_CONFIRMED)
3905                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3906                         net->dest_state = SCTP_ADDR_REACHABLE;
3907                 else
3908                         net->dest_state = SCTP_ADDR_REACHABLE |
3909                             SCTP_ADDR_UNCONFIRMED;
3910         }
3911         /*
3912          * We set this to 0, the timer code knows that this means its an
3913          * initial value
3914          */
3915         net->rto_needed = 1;
3916         net->RTO = 0;
3917         net->RTO_measured = 0;
3918         stcb->asoc.numnets++;
3919         net->ref_count = 1;
3920         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3921         net->port = stcb->asoc.port;
3922         net->dscp = stcb->asoc.default_dscp;
3923 #ifdef INET6
3924         net->flowlabel = stcb->asoc.default_flowlabel;
3925 #endif
3926         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3927                 net->dest_state |= SCTP_ADDR_NOHB;
3928         } else {
3929                 net->dest_state &= ~SCTP_ADDR_NOHB;
3930         }
3931         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3932                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3933         } else {
3934                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3935         }
3936         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3937         /* Init the timer structure */
3938         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3939         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3940         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3941
3942         /* Now generate a route for this guy */
3943 #ifdef INET6
3944         /* KAME hack: embed scopeid */
3945         if (newaddr->sa_family == AF_INET6) {
3946                 struct sockaddr_in6 *sin6;
3947
3948                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3949                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3950                 sin6->sin6_scope_id = 0;
3951         }
3952 #endif
3953         SCTP_RTALLOC((sctp_route_t *) & net->ro,
3954             stcb->asoc.vrf_id,
3955             stcb->sctp_ep->fibnum);
3956
3957         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3958                 /* Get source address */
3959                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3960                     stcb,
3961                     (sctp_route_t *) & net->ro,
3962                     net,
3963                     0,
3964                     stcb->asoc.vrf_id);
3965                 if (net->ro._s_addr != NULL) {
3966                         net->src_addr_selected = 1;
3967                         /* Now get the interface MTU */
3968                         if (net->ro._s_addr->ifn_p != NULL) {
3969                                 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3970                         }
3971                 } else {
3972                         net->src_addr_selected = 0;
3973                 }
3974                 if (net->mtu > 0) {
3975                         uint32_t rmtu;
3976
3977                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3978                         if (rmtu == 0) {
3979                                 /*
3980                                  * Start things off to match mtu of
3981                                  * interface please.
3982                                  */
3983                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3984                                     net->ro.ro_rt, net->mtu);
3985                         } else {
3986                                 /*
3987                                  * we take the route mtu over the interface,
3988                                  * since the route may be leading out the
3989                                  * loopback, or a different interface.
3990                                  */
3991                                 net->mtu = rmtu;
3992                         }
3993                 }
3994         } else {
3995                 net->src_addr_selected = 0;
3996         }
3997         if (net->mtu == 0) {
3998                 switch (newaddr->sa_family) {
3999 #ifdef INET
4000                 case AF_INET:
4001                         net->mtu = SCTP_DEFAULT_MTU;
4002                         break;
4003 #endif
4004 #ifdef INET6
4005                 case AF_INET6:
4006                         net->mtu = 1280;
4007                         break;
4008 #endif
4009                 default:
4010                         break;
4011                 }
4012         }
4013 #if defined(INET) || defined(INET6)
4014         if (net->port) {
4015                 net->mtu -= (uint32_t) sizeof(struct udphdr);
4016         }
4017 #endif
4018         if (from == SCTP_ALLOC_ASOC) {
4019                 stcb->asoc.smallest_mtu = net->mtu;
4020         }
4021         if (stcb->asoc.smallest_mtu > net->mtu) {
4022                 stcb->asoc.smallest_mtu = net->mtu;
4023         }
4024 #ifdef INET6
4025         if (newaddr->sa_family == AF_INET6) {
4026                 struct sockaddr_in6 *sin6;
4027
4028                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4029                 (void)sa6_recoverscope(sin6);
4030         }
4031 #endif
4032
4033         /* JRS - Use the congestion control given in the CC module */
4034         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4035                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4036
4037         /*
4038          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4039          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4040          */
4041         net->find_pseudo_cumack = 1;
4042         net->find_rtx_pseudo_cumack = 1;
4043         /* Choose an initial flowid. */
4044         net->flowid = stcb->asoc.my_vtag ^
4045             ntohs(stcb->rport) ^
4046             ntohs(stcb->sctp_ep->sctp_lport);
4047         net->flowtype = M_HASHTYPE_OPAQUE;
4048         if (netp) {
4049                 *netp = net;
4050         }
4051         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4052         if (net->ro.ro_rt == NULL) {
4053                 /* Since we have no route put it at the back */
4054                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4055         } else if (netfirst == NULL) {
4056                 /* We are the first one in the pool. */
4057                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4058         } else if (netfirst->ro.ro_rt == NULL) {
4059                 /*
4060                  * First one has NO route. Place this one ahead of the first
4061                  * one.
4062                  */
4063                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4064         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4065                 /*
4066                  * This one has a different interface than the one at the
4067                  * top of the list. Place it ahead.
4068                  */
4069                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4070         } else {
4071                 /*
4072                  * Ok we have the same interface as the first one. Move
4073                  * forward until we find either a) one with a NULL route...
4074                  * insert ahead of that b) one with a different ifp.. insert
4075                  * after that. c) end of the list.. insert at the tail.
4076                  */
4077                 struct sctp_nets *netlook;
4078
4079                 do {
4080                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4081                         if (netlook == NULL) {
4082                                 /* End of the list */
4083                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4084                                 break;
4085                         } else if (netlook->ro.ro_rt == NULL) {
4086                                 /* next one has NO route */
4087                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4088                                 break;
4089                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4090                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4091                                     net, sctp_next);
4092                                 break;
4093                         }
4094                         /* Shift forward */
4095                         netfirst = netlook;
4096                 } while (netlook != NULL);
4097         }
4098
4099         /* got to have a primary set */
4100         if (stcb->asoc.primary_destination == 0) {
4101                 stcb->asoc.primary_destination = net;
4102         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4103                     (net->ro.ro_rt) &&
4104             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4105                 /* No route to current primary adopt new primary */
4106                 stcb->asoc.primary_destination = net;
4107         }
4108         /* Validate primary is first */
4109         net = TAILQ_FIRST(&stcb->asoc.nets);
4110         if ((net != stcb->asoc.primary_destination) &&
4111             (stcb->asoc.primary_destination)) {
4112                 /*
4113                  * first one on the list is NOT the primary sctp_cmpaddr()
4114                  * is much more efficient if the primary is the first on the
4115                  * list, make it so.
4116                  */
4117                 TAILQ_REMOVE(&stcb->asoc.nets,
4118                     stcb->asoc.primary_destination, sctp_next);
4119                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4120                     stcb->asoc.primary_destination, sctp_next);
4121         }
4122         return (0);
4123 }
4124
4125
4126 static uint32_t
4127 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4128 {
4129         uint32_t id;
4130         struct sctpasochead *head;
4131         struct sctp_tcb *lstcb;
4132
4133         SCTP_INP_WLOCK(inp);
4134 try_again:
4135         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4136                 /* TSNH */
4137                 SCTP_INP_WUNLOCK(inp);
4138                 return (0);
4139         }
4140         /*
4141          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4142          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4143          */
4144         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4145                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4146         }
4147         id = inp->sctp_associd_counter;
4148         inp->sctp_associd_counter++;
4149         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4150         if (lstcb) {
4151                 goto try_again;
4152         }
4153         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4154         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4155         stcb->asoc.in_asocid_hash = 1;
4156         SCTP_INP_WUNLOCK(inp);
4157         return id;
4158 }
4159
4160 /*
4161  * allocate an association and add it to the endpoint. The caller must be
4162  * careful to add all additional addresses once they are know right away or
4163  * else the assoc will be may experience a blackout scenario.
4164  */
4165 struct sctp_tcb *
4166 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4167     int *error, uint32_t override_tag, uint32_t vrf_id,
4168     struct thread *p
4169 )
4170 {
4171         /* note the p argument is only valid in unbound sockets */
4172
4173         struct sctp_tcb *stcb;
4174         struct sctp_association *asoc;
4175         struct sctpasochead *head;
4176         uint16_t rport;
4177         int err;
4178
4179         /*
4180          * Assumption made here: Caller has done a
4181          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4182          * address does not exist already.
4183          */
4184         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4185                 /* Hit max assoc, sorry no more */
4186                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4187                 *error = ENOBUFS;
4188                 return (NULL);
4189         }
4190         if (firstaddr == NULL) {
4191                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4192                 *error = EINVAL;
4193                 return (NULL);
4194         }
4195         SCTP_INP_RLOCK(inp);
4196         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4197             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4198             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4199                 /*
4200                  * If its in the TCP pool, its NOT allowed to create an
4201                  * association. The parent listener needs to call
4202                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4203                  * off, or connected one does this.. its an error.
4204                  */
4205                 SCTP_INP_RUNLOCK(inp);
4206                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4207                 *error = EINVAL;
4208                 return (NULL);
4209         }
4210         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4211             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4212                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4213                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4214                         SCTP_INP_RUNLOCK(inp);
4215                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4216                         *error = EINVAL;
4217                         return (NULL);
4218                 }
4219         }
4220         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4221 #ifdef SCTP_DEBUG
4222         if (firstaddr) {
4223                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4224                 switch (firstaddr->sa_family) {
4225 #ifdef INET
4226                 case AF_INET:
4227                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4228                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4229                         break;
4230 #endif
4231 #ifdef INET6
4232                 case AF_INET6:
4233                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4234                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4235                         break;
4236 #endif
4237                 default:
4238                         break;
4239                 }
4240         } else {
4241                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4242         }
4243 #endif                          /* SCTP_DEBUG */
4244         switch (firstaddr->sa_family) {
4245 #ifdef INET
4246         case AF_INET:
4247                 {
4248                         struct sockaddr_in *sin;
4249
4250                         sin = (struct sockaddr_in *)firstaddr;
4251                         if ((ntohs(sin->sin_port) == 0) ||
4252                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4253                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4254                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4255                                 /* Invalid address */
4256                                 SCTP_INP_RUNLOCK(inp);
4257                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4258                                 *error = EINVAL;
4259                                 return (NULL);
4260                         }
4261                         rport = sin->sin_port;
4262                         break;
4263                 }
4264 #endif
4265 #ifdef INET6
4266         case AF_INET6:
4267                 {
4268                         struct sockaddr_in6 *sin6;
4269
4270                         sin6 = (struct sockaddr_in6 *)firstaddr;
4271                         if ((ntohs(sin6->sin6_port) == 0) ||
4272                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4273                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4274                                 /* Invalid address */
4275                                 SCTP_INP_RUNLOCK(inp);
4276                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4277                                 *error = EINVAL;
4278                                 return (NULL);
4279                         }
4280                         rport = sin6->sin6_port;
4281                         break;
4282                 }
4283 #endif
4284         default:
4285                 /* not supported family type */
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         SCTP_INP_RUNLOCK(inp);
4292         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4293                 /*
4294                  * If you have not performed a bind, then we need to do the
4295                  * ephemeral bind for you.
4296                  */
4297                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4298                     (struct sockaddr *)NULL,
4299                     (struct sctp_ifa *)NULL,
4300                     p
4301                     ))) {
4302                         /* bind error, probably perm */
4303                         *error = err;
4304                         return (NULL);
4305                 }
4306         }
4307         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4308         if (stcb == NULL) {
4309                 /* out of memory? */
4310                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4311                 *error = ENOMEM;
4312                 return (NULL);
4313         }
4314         SCTP_INCR_ASOC_COUNT();
4315
4316         bzero(stcb, sizeof(*stcb));
4317         asoc = &stcb->asoc;
4318
4319         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4320         SCTP_TCB_LOCK_INIT(stcb);
4321         SCTP_TCB_SEND_LOCK_INIT(stcb);
4322         stcb->rport = rport;
4323         /* setup back pointer's */
4324         stcb->sctp_ep = inp;
4325         stcb->sctp_socket = inp->sctp_socket;
4326         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4327                 /* failed */
4328                 SCTP_TCB_LOCK_DESTROY(stcb);
4329                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4330                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4331                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4332                 SCTP_DECR_ASOC_COUNT();
4333                 *error = err;
4334                 return (NULL);
4335         }
4336         /* and the port */
4337         SCTP_INP_INFO_WLOCK();
4338         SCTP_INP_WLOCK(inp);
4339         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4340                 /* inpcb freed while alloc going on */
4341                 SCTP_TCB_LOCK_DESTROY(stcb);
4342                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4343                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4344                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4345                 SCTP_INP_WUNLOCK(inp);
4346                 SCTP_INP_INFO_WUNLOCK();
4347                 SCTP_DECR_ASOC_COUNT();
4348                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4349                 *error = EINVAL;
4350                 return (NULL);
4351         }
4352         SCTP_TCB_LOCK(stcb);
4353
4354         /* now that my_vtag is set, add it to the hash */
4355         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4356         /* put it in the bucket in the vtag hash of assoc's for the system */
4357         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4358         SCTP_INP_INFO_WUNLOCK();
4359
4360         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4361                 /* failure.. memory error? */
4362                 if (asoc->strmout) {
4363                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4364                         asoc->strmout = NULL;
4365                 }
4366                 if (asoc->mapping_array) {
4367                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4368                         asoc->mapping_array = NULL;
4369                 }
4370                 if (asoc->nr_mapping_array) {
4371                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4372                         asoc->nr_mapping_array = NULL;
4373                 }
4374                 SCTP_DECR_ASOC_COUNT();
4375                 SCTP_TCB_UNLOCK(stcb);
4376                 SCTP_TCB_LOCK_DESTROY(stcb);
4377                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4378                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4379                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4380                 SCTP_INP_WUNLOCK(inp);
4381                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4382                 *error = ENOBUFS;
4383                 return (NULL);
4384         }
4385         /* Init all the timers */
4386         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4387         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4388         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4389         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4390         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4391         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4392         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4393
4394         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4395         /* now file the port under the hash as well */
4396         if (inp->sctp_tcbhash != NULL) {
4397                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4398                     inp->sctp_hashmark)];
4399                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4400         }
4401         SCTP_INP_WUNLOCK(inp);
4402         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4403         return (stcb);
4404 }
4405
4406
4407 void
4408 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4409 {
4410         struct sctp_association *asoc;
4411
4412         asoc = &stcb->asoc;
4413         asoc->numnets--;
4414         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4415         if (net == asoc->primary_destination) {
4416                 /* Reset primary */
4417                 struct sctp_nets *lnet;
4418
4419                 lnet = TAILQ_FIRST(&asoc->nets);
4420                 /*
4421                  * Mobility adaptation Ideally, if deleted destination is
4422                  * the primary, it becomes a fast retransmission trigger by
4423                  * the subsequent SET PRIMARY. (by micchie)
4424                  */
4425                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4426                     SCTP_MOBILITY_BASE) ||
4427                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4428                     SCTP_MOBILITY_FASTHANDOFF)) {
4429                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4430                         if (asoc->deleted_primary != NULL) {
4431                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4432                                 goto out;
4433                         }
4434                         asoc->deleted_primary = net;
4435                         atomic_add_int(&net->ref_count, 1);
4436                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4437                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4438                         sctp_mobility_feature_on(stcb->sctp_ep,
4439                             SCTP_MOBILITY_PRIM_DELETED);
4440                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4441                             stcb->sctp_ep, stcb, NULL);
4442                 }
4443 out:
4444                 /* Try to find a confirmed primary */
4445                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4446         }
4447         if (net == asoc->last_data_chunk_from) {
4448                 /* Reset primary */
4449                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4450         }
4451         if (net == asoc->last_control_chunk_from) {
4452                 /* Clear net */
4453                 asoc->last_control_chunk_from = NULL;
4454         }
4455         if (net == stcb->asoc.alternate) {
4456                 sctp_free_remote_addr(stcb->asoc.alternate);
4457                 stcb->asoc.alternate = NULL;
4458         }
4459         sctp_free_remote_addr(net);
4460 }
4461
4462 /*
4463  * remove a remote endpoint address from an association, it will fail if the
4464  * address does not exist.
4465  */
4466 int
4467 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4468 {
4469         /*
4470          * Here we need to remove a remote address. This is quite simple, we
4471          * first find it in the list of address for the association
4472          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4473          * on that item. Note we do not allow it to be removed if there are
4474          * no other addresses.
4475          */
4476         struct sctp_association *asoc;
4477         struct sctp_nets *net, *nnet;
4478
4479         asoc = &stcb->asoc;
4480
4481         /* locate the address */
4482         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4483                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4484                         continue;
4485                 }
4486                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4487                     remaddr)) {
4488                         /* we found the guy */
4489                         if (asoc->numnets < 2) {
4490                                 /* Must have at LEAST two remote addresses */
4491                                 return (-1);
4492                         } else {
4493                                 sctp_remove_net(stcb, net);
4494                                 return (0);
4495                         }
4496                 }
4497         }
4498         /* not found. */
4499         return (-2);
4500 }
4501
4502 void
4503 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4504 {
4505         struct sctpvtaghead *chain;
4506         struct sctp_tagblock *twait_block;
4507         int found = 0;
4508         int i;
4509
4510         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4511         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4512                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4513                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4514                             (twait_block->vtag_block[i].lport == lport) &&
4515                             (twait_block->vtag_block[i].rport == rport)) {
4516                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4517                                 twait_block->vtag_block[i].v_tag = 0;
4518                                 twait_block->vtag_block[i].lport = 0;
4519                                 twait_block->vtag_block[i].rport = 0;
4520                                 found = 1;
4521                                 break;
4522                         }
4523                 }
4524                 if (found)
4525                         break;
4526         }
4527 }
4528
4529 int
4530 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4531 {
4532         struct sctpvtaghead *chain;
4533         struct sctp_tagblock *twait_block;
4534         int found = 0;
4535         int i;
4536
4537         SCTP_INP_INFO_WLOCK();
4538         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4539         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4540                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4541                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4542                             (twait_block->vtag_block[i].lport == lport) &&
4543                             (twait_block->vtag_block[i].rport == rport)) {
4544                                 found = 1;
4545                                 break;
4546                         }
4547                 }
4548                 if (found)
4549                         break;
4550         }
4551         SCTP_INP_INFO_WUNLOCK();
4552         return (found);
4553 }
4554
4555
4556 void
4557 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4558 {
4559         struct sctpvtaghead *chain;
4560         struct sctp_tagblock *twait_block;
4561         struct timeval now;
4562         int set, i;
4563
4564         if (time == 0) {
4565                 /* Its disabled */
4566                 return;
4567         }
4568         (void)SCTP_GETTIME_TIMEVAL(&now);
4569         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4570         set = 0;
4571         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4572                 /* Block(s) present, lets find space, and expire on the fly */
4573                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4574                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4575                             !set) {
4576                                 twait_block->vtag_block[i].tv_sec_at_expire =
4577                                     now.tv_sec + time;
4578                                 twait_block->vtag_block[i].v_tag = tag;
4579                                 twait_block->vtag_block[i].lport = lport;
4580                                 twait_block->vtag_block[i].rport = rport;
4581                                 set = 1;
4582                         } else if ((twait_block->vtag_block[i].v_tag) &&
4583                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4584                                 /* Audit expires this guy */
4585                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4586                                 twait_block->vtag_block[i].v_tag = 0;
4587                                 twait_block->vtag_block[i].lport = 0;
4588                                 twait_block->vtag_block[i].rport = 0;
4589                                 if (set == 0) {
4590                                         /* Reuse it for my new tag */
4591                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4592                                         twait_block->vtag_block[i].v_tag = tag;
4593                                         twait_block->vtag_block[i].lport = lport;
4594                                         twait_block->vtag_block[i].rport = rport;
4595                                         set = 1;
4596                                 }
4597                         }
4598                 }
4599                 if (set) {
4600                         /*
4601                          * We only do up to the block where we can place our
4602                          * tag for audits
4603                          */
4604                         break;
4605                 }
4606         }
4607         /* Need to add a new block to chain */
4608         if (!set) {
4609                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4610                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4611                 if (twait_block == NULL) {
4612 #ifdef INVARIANTS
4613                         panic("Can not alloc tagblock");
4614 #endif
4615                         return;
4616                 }
4617                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4618                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4619                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4620                 twait_block->vtag_block[0].v_tag = tag;
4621                 twait_block->vtag_block[0].lport = lport;
4622                 twait_block->vtag_block[0].rport = rport;
4623         }
4624 }
4625
4626
4627
4628 /*-
4629  * Free the association after un-hashing the remote port. This
4630  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4631  * expect that the input to this function IS a locked TCB.
4632  * It will return 0, if it did NOT destroy the association (instead
4633  * it unlocks it. It will return NON-zero if it either destroyed the
4634  * association OR the association is already destroyed.
4635  */
4636 int
4637 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4638 {
4639         int i;
4640         struct sctp_association *asoc;
4641         struct sctp_nets *net, *nnet;
4642         struct sctp_laddr *laddr, *naddr;
4643         struct sctp_tmit_chunk *chk, *nchk;
4644         struct sctp_asconf_addr *aparam, *naparam;
4645         struct sctp_asconf_ack *aack, *naack;
4646         struct sctp_stream_reset_list *strrst, *nstrrst;
4647         struct sctp_queued_to_read *sq, *nsq;
4648         struct sctp_stream_queue_pending *sp, *nsp;
4649         sctp_sharedkey_t *shared_key, *nshared_key;
4650         struct socket *so;
4651
4652         /* first, lets purge the entry from the hash table. */
4653
4654 #ifdef SCTP_LOG_CLOSING
4655         sctp_log_closing(inp, stcb, 6);
4656 #endif
4657         if (stcb->asoc.state == 0) {
4658 #ifdef SCTP_LOG_CLOSING
4659                 sctp_log_closing(inp, NULL, 7);
4660 #endif
4661                 /* there is no asoc, really TSNH :-0 */
4662                 return (1);
4663         }
4664         if (stcb->asoc.alternate) {
4665                 sctp_free_remote_addr(stcb->asoc.alternate);
4666                 stcb->asoc.alternate = NULL;
4667         }
4668         /* TEMP CODE */
4669         if (stcb->freed_from_where == 0) {
4670                 /* Only record the first place free happened from */
4671                 stcb->freed_from_where = from_location;
4672         }
4673         /* TEMP CODE */
4674
4675         asoc = &stcb->asoc;
4676         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4677             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4678                 /* nothing around */
4679                 so = NULL;
4680         else
4681                 so = inp->sctp_socket;
4682
4683         /*
4684          * We used timer based freeing if a reader or writer is in the way.
4685          * So we first check if we are actually being called from a timer,
4686          * if so we abort early if a reader or writer is still in the way.
4687          */
4688         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4689             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4690                 /*
4691                  * is it the timer driving us? if so are the reader/writers
4692                  * gone?
4693                  */
4694                 if (stcb->asoc.refcnt) {
4695                         /* nope, reader or writer in the way */
4696                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4697                         /* no asoc destroyed */
4698                         SCTP_TCB_UNLOCK(stcb);
4699 #ifdef SCTP_LOG_CLOSING
4700                         sctp_log_closing(inp, stcb, 8);
4701 #endif
4702                         return (0);
4703                 }
4704         }
4705         /* now clean up any other timers */
4706         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4707         asoc->dack_timer.self = NULL;
4708         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4709         /*-
4710          * For stream reset we don't blast this unless
4711          * it is a str-reset timer, it might be the
4712          * free-asoc timer which we DON'T want to
4713          * disturb.
4714          */
4715         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4716                 asoc->strreset_timer.self = NULL;
4717         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4718         asoc->asconf_timer.self = NULL;
4719         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4720         asoc->autoclose_timer.self = NULL;
4721         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4722         asoc->shut_guard_timer.self = NULL;
4723         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4724         asoc->delayed_event_timer.self = NULL;
4725         /* Mobility adaptation */
4726         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4727         asoc->delete_prim_timer.self = NULL;
4728         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4729                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4730                 net->rxt_timer.self = NULL;
4731                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4732                 net->pmtu_timer.self = NULL;
4733                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4734                 net->hb_timer.self = NULL;
4735         }
4736         /* Now the read queue needs to be cleaned up (only once) */
4737         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4738                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4739                 SCTP_INP_READ_LOCK(inp);
4740                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4741                         if (sq->stcb == stcb) {
4742                                 sq->do_not_ref_stcb = 1;
4743                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4744                                 /*
4745                                  * If there is no end, there never will be
4746                                  * now.
4747                                  */
4748                                 if (sq->end_added == 0) {
4749                                         /* Held for PD-API clear that. */
4750                                         sq->pdapi_aborted = 1;
4751                                         sq->held_length = 0;
4752                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4753                                                 /*
4754                                                  * Need to add a PD-API
4755                                                  * aborted indication.
4756                                                  * Setting the control_pdapi
4757                                                  * assures that it will be
4758                                                  * added right after this
4759                                                  * msg.
4760                                                  */
4761                                                 uint32_t strseq;
4762
4763                                                 stcb->asoc.control_pdapi = sq;
4764                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4765                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4766                                                     stcb,
4767                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4768                                                     (void *)&strseq,
4769                                                     SCTP_SO_LOCKED);
4770                                                 stcb->asoc.control_pdapi = NULL;
4771                                         }
4772                                 }
4773                                 /* Add an end to wake them */
4774                                 sq->end_added = 1;
4775                         }
4776                 }
4777                 SCTP_INP_READ_UNLOCK(inp);
4778                 if (stcb->block_entry) {
4779                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4780                         stcb->block_entry->error = ECONNRESET;
4781                         stcb->block_entry = NULL;
4782                 }
4783         }
4784         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4785                 /*
4786                  * Someone holds a reference OR the socket is unaccepted
4787                  * yet.
4788                  */
4789                 if ((stcb->asoc.refcnt) ||
4790                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4791                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4792                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4793                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4794                 }
4795                 SCTP_TCB_UNLOCK(stcb);
4796                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4797                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4798                         /* nothing around */
4799                         so = NULL;
4800                 if (so) {
4801                         /* Wake any reader/writers */
4802                         sctp_sorwakeup(inp, so);
4803                         sctp_sowwakeup(inp, so);
4804                 }
4805 #ifdef SCTP_LOG_CLOSING
4806                 sctp_log_closing(inp, stcb, 9);
4807 #endif
4808                 /* no asoc destroyed */
4809                 return (0);
4810         }
4811 #ifdef SCTP_LOG_CLOSING
4812         sctp_log_closing(inp, stcb, 10);
4813 #endif
4814         /*
4815          * When I reach here, no others want to kill the assoc yet.. and I
4816          * own the lock. Now its possible an abort comes in when I do the
4817          * lock exchange below to grab all the locks to do the final take
4818          * out. to prevent this we increment the count, which will start a
4819          * timer and blow out above thus assuring us that we hold exclusive
4820          * killing of the asoc. Note that after getting back the TCB lock we
4821          * will go ahead and increment the counter back up and stop any
4822          * timer a passing stranger may have started :-S
4823          */
4824         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4825                 atomic_add_int(&stcb->asoc.refcnt, 1);
4826
4827                 SCTP_TCB_UNLOCK(stcb);
4828                 SCTP_INP_INFO_WLOCK();
4829                 SCTP_INP_WLOCK(inp);
4830                 SCTP_TCB_LOCK(stcb);
4831         }
4832         /* Double check the GONE flag */
4833         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4834             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4835                 /* nothing around */
4836                 so = NULL;
4837
4838         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4839             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4840                 /*
4841                  * For TCP type we need special handling when we are
4842                  * connected. We also include the peel'ed off ones to.
4843                  */
4844                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4845                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4846                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4847                         if (so) {
4848                                 SOCK_LOCK(so);
4849                                 if (so->so_rcv.sb_cc == 0) {
4850                                         so->so_state &= ~(SS_ISCONNECTING |
4851                                             SS_ISDISCONNECTING |
4852                                             SS_ISCONFIRMING |
4853                                             SS_ISCONNECTED);
4854                                 }
4855                                 socantrcvmore_locked(so);
4856                                 sctp_sowwakeup(inp, so);
4857                                 sctp_sorwakeup(inp, so);
4858                                 SCTP_SOWAKEUP(so);
4859                         }
4860                 }
4861         }
4862         /*
4863          * Make it invalid too, that way if its about to run it will abort
4864          * and return.
4865          */
4866         /* re-increment the lock */
4867         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4868                 atomic_add_int(&stcb->asoc.refcnt, -1);
4869         }
4870         if (stcb->asoc.refcnt) {
4871                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4872                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4873                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4874                         SCTP_INP_INFO_WUNLOCK();
4875                         SCTP_INP_WUNLOCK(inp);
4876                 }
4877                 SCTP_TCB_UNLOCK(stcb);
4878                 return (0);
4879         }
4880         asoc->state = 0;
4881         if (inp->sctp_tcbhash) {
4882                 LIST_REMOVE(stcb, sctp_tcbhash);
4883         }
4884         if (stcb->asoc.in_asocid_hash) {
4885                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4886         }
4887         /* Now lets remove it from the list of ALL associations in the EP */
4888         LIST_REMOVE(stcb, sctp_tcblist);
4889         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4890                 SCTP_INP_INCR_REF(inp);
4891                 SCTP_INP_WUNLOCK(inp);
4892         }
4893         /* pull from vtag hash */
4894         LIST_REMOVE(stcb, sctp_asocs);
4895         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4896             inp->sctp_lport, stcb->rport);
4897
4898         /*
4899          * Now restop the timers to be sure this is paranoia at is finest!
4900          */
4901         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4902         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4903         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4904         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4905         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4906         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4907         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4908         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4909                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4910                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4911                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4912         }
4913
4914         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4915         /*
4916          * The chunk lists and such SHOULD be empty but we check them just
4917          * in case.
4918          */
4919         /* anything on the wheel needs to be removed */
4920         for (i = 0; i < asoc->streamoutcnt; i++) {
4921                 struct sctp_stream_out *outs;
4922
4923                 outs = &asoc->strmout[i];
4924                 /* now clean up any chunks here */
4925                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4926                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4927                         sctp_free_spbufspace(stcb, asoc, sp);
4928                         if (sp->data) {
4929                                 if (so) {
4930                                         /* Still an open socket - report */
4931                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4932                                             0, (void *)sp, SCTP_SO_LOCKED);
4933                                 }
4934                                 if (sp->data) {
4935                                         sctp_m_freem(sp->data);
4936                                         sp->data = NULL;
4937                                         sp->tail_mbuf = NULL;
4938                                         sp->length = 0;
4939                                 }
4940                         }
4941                         if (sp->net) {
4942                                 sctp_free_remote_addr(sp->net);
4943                                 sp->net = NULL;
4944                         }
4945                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4946                 }
4947         }
4948         /* sa_ignore FREED_MEMORY */
4949         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4950                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4951                 SCTP_FREE(strrst, SCTP_M_STRESET);
4952         }
4953         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4954                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4955                 if (sq->data) {
4956                         sctp_m_freem(sq->data);
4957                         sq->data = NULL;
4958                 }
4959                 sctp_free_remote_addr(sq->whoFrom);
4960                 sq->whoFrom = NULL;
4961                 sq->stcb = NULL;
4962                 /* Free the ctl entry */
4963                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4964                 SCTP_DECR_READQ_COUNT();
4965                 /* sa_ignore FREED_MEMORY */
4966         }
4967         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4968                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4969                 if (chk->data) {
4970                         sctp_m_freem(chk->data);
4971                         chk->data = NULL;
4972                 }
4973                 if (chk->holds_key_ref)
4974                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4975                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4976                 SCTP_DECR_CHK_COUNT();
4977                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4978                 asoc->free_chunk_cnt--;
4979                 /* sa_ignore FREED_MEMORY */
4980         }
4981         /* pending send queue SHOULD be empty */
4982         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4983                 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
4984                         asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
4985 #ifdef INVARIANTS
4986                 } else {
4987                         panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
4988 #endif
4989                 }
4990                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4991                 if (chk->data) {
4992                         if (so) {
4993                                 /* Still a socket? */
4994                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
4995                                     0, chk, SCTP_SO_LOCKED);
4996                         }
4997                         if (chk->data) {
4998                                 sctp_m_freem(chk->data);
4999                                 chk->data = NULL;
5000                         }
5001                 }
5002                 if (chk->holds_key_ref)
5003                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5004                 if (chk->whoTo) {
5005                         sctp_free_remote_addr(chk->whoTo);
5006                         chk->whoTo = NULL;
5007                 }
5008                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5009                 SCTP_DECR_CHK_COUNT();
5010                 /* sa_ignore FREED_MEMORY */
5011         }
5012         /* sent queue SHOULD be empty */
5013         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5014                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5015                         if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
5016                                 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
5017 #ifdef INVARIANTS
5018                         } else {
5019                                 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
5020 #endif
5021                         }
5022                 }
5023                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5024                 if (chk->data) {
5025                         if (so) {
5026                                 /* Still a socket? */
5027                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5028                                     0, chk, SCTP_SO_LOCKED);
5029                         }
5030                         if (chk->data) {
5031                                 sctp_m_freem(chk->data);
5032                                 chk->data = NULL;
5033                         }
5034                 }
5035                 if (chk->holds_key_ref)
5036                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5037                 sctp_free_remote_addr(chk->whoTo);
5038                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5039                 SCTP_DECR_CHK_COUNT();
5040                 /* sa_ignore FREED_MEMORY */
5041         }
5042 #ifdef INVARIANTS
5043         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5044                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5045                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5046                 }
5047         }
5048 #endif
5049         /* control queue MAY not be empty */
5050         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5051                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5052                 if (chk->data) {
5053                         sctp_m_freem(chk->data);
5054                         chk->data = NULL;
5055                 }
5056                 if (chk->holds_key_ref)
5057                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5058                 sctp_free_remote_addr(chk->whoTo);
5059                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5060                 SCTP_DECR_CHK_COUNT();
5061                 /* sa_ignore FREED_MEMORY */
5062         }
5063         /* ASCONF queue MAY not be empty */
5064         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5065                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5066                 if (chk->data) {
5067                         sctp_m_freem(chk->data);
5068                         chk->data = NULL;
5069                 }
5070                 if (chk->holds_key_ref)
5071                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5072                 sctp_free_remote_addr(chk->whoTo);
5073                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5074                 SCTP_DECR_CHK_COUNT();
5075                 /* sa_ignore FREED_MEMORY */
5076         }
5077         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5078                 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5079                 if (chk->data) {
5080                         sctp_m_freem(chk->data);
5081                         chk->data = NULL;
5082                 }
5083                 if (chk->holds_key_ref)
5084                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5085                 sctp_free_remote_addr(chk->whoTo);
5086                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5087                 SCTP_DECR_CHK_COUNT();
5088                 /* sa_ignore FREED_MEMORY */
5089         }
5090
5091         if (asoc->mapping_array) {
5092                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5093                 asoc->mapping_array = NULL;
5094         }
5095         if (asoc->nr_mapping_array) {
5096                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5097                 asoc->nr_mapping_array = NULL;
5098         }
5099         /* the stream outs */
5100         if (asoc->strmout) {
5101                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5102                 asoc->strmout = NULL;
5103         }
5104         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5105         if (asoc->strmin) {
5106                 struct sctp_queued_to_read *ctl, *nctl;
5107
5108                 for (i = 0; i < asoc->streamincnt; i++) {
5109                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5110                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5111                                 sctp_free_remote_addr(ctl->whoFrom);
5112                                 if (ctl->data) {
5113                                         sctp_m_freem(ctl->data);
5114                                         ctl->data = NULL;
5115                                 }
5116                                 /*
5117                                  * We don't free the address here since all
5118                                  * the net's were freed above.
5119                                  */
5120                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5121                                 SCTP_DECR_READQ_COUNT();
5122                         }
5123                 }
5124                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5125                 asoc->strmin = NULL;
5126         }
5127         asoc->streamincnt = 0;
5128         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5129 #ifdef INVARIANTS
5130                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5131                         panic("no net's left alloc'ed, or list points to itself");
5132                 }
5133 #endif
5134                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5135                 sctp_free_remote_addr(net);
5136         }
5137         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5138                 /* sa_ignore FREED_MEMORY */
5139                 sctp_remove_laddr(laddr);
5140         }
5141
5142         /* pending asconf (address) parameters */
5143         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5144                 /* sa_ignore FREED_MEMORY */
5145                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5146                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5147         }
5148         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5149                 /* sa_ignore FREED_MEMORY */
5150                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5151                 if (aack->data != NULL) {
5152                         sctp_m_freem(aack->data);
5153                 }
5154                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5155         }
5156         /* clean up auth stuff */
5157         if (asoc->local_hmacs)
5158                 sctp_free_hmaclist(asoc->local_hmacs);
5159         if (asoc->peer_hmacs)
5160                 sctp_free_hmaclist(asoc->peer_hmacs);
5161
5162         if (asoc->local_auth_chunks)
5163                 sctp_free_chunklist(asoc->local_auth_chunks);
5164         if (asoc->peer_auth_chunks)
5165                 sctp_free_chunklist(asoc->peer_auth_chunks);
5166
5167         sctp_free_authinfo(&asoc->authinfo);
5168
5169         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5170                 LIST_REMOVE(shared_key, next);
5171                 sctp_free_sharedkey(shared_key);
5172                 /* sa_ignore FREED_MEMORY */
5173         }
5174
5175         /* Insert new items here :> */
5176
5177         /* Get rid of LOCK */
5178         SCTP_TCB_UNLOCK(stcb);
5179         SCTP_TCB_LOCK_DESTROY(stcb);
5180         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5181         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5182                 SCTP_INP_INFO_WUNLOCK();
5183                 SCTP_INP_RLOCK(inp);
5184         }
5185 #ifdef SCTP_TRACK_FREED_ASOCS
5186         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5187                 /* now clean up the tasoc itself */
5188                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5189                 SCTP_DECR_ASOC_COUNT();
5190         } else {
5191                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5192         }
5193 #else
5194         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5195         SCTP_DECR_ASOC_COUNT();
5196 #endif
5197         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5198                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5199                         /*
5200                          * If its NOT the inp_free calling us AND sctp_close
5201                          * as been called, we call back...
5202                          */
5203                         SCTP_INP_RUNLOCK(inp);
5204                         /*
5205                          * This will start the kill timer (if we are the
5206                          * last one) since we hold an increment yet. But
5207                          * this is the only safe way to do this since
5208                          * otherwise if the socket closes at the same time
5209                          * we are here we might collide in the cleanup.
5210                          */
5211                         sctp_inpcb_free(inp,
5212                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5213                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5214                         SCTP_INP_DECR_REF(inp);
5215                         goto out_of;
5216                 } else {
5217                         /* The socket is still open. */
5218                         SCTP_INP_DECR_REF(inp);
5219                 }
5220         }
5221         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5222                 SCTP_INP_RUNLOCK(inp);
5223         }
5224 out_of:
5225         /* destroyed the asoc */
5226 #ifdef SCTP_LOG_CLOSING
5227         sctp_log_closing(inp, NULL, 11);
5228 #endif
5229         return (1);
5230 }
5231
5232
5233
5234 /*
5235  * determine if a destination is "reachable" based upon the addresses bound
5236  * to the current endpoint (e.g. only v4 or v6 currently bound)
5237  */
5238 /*
5239  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5240  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5241  * types bound as its endpoint
5242  */
5243 int
5244 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5245 {
5246         struct sctp_inpcb *inp;
5247         int answer;
5248
5249         /*
5250          * No locks here, the TCB, in all cases is already locked and an
5251          * assoc is up. There is either a INP lock by the caller applied (in
5252          * asconf case when deleting an address) or NOT in the HB case,
5253          * however if HB then the INP increment is up and the INP will not
5254          * be removed (on top of the fact that we have a TCB lock). So we
5255          * only want to read the sctp_flags, which is either bound-all or
5256          * not.. no protection needed since once an assoc is up you can't be
5257          * changing your binding.
5258          */
5259         inp = stcb->sctp_ep;
5260         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5261                 /* if bound all, destination is not restricted */
5262                 /*
5263                  * RRS: Question during lock work: Is this correct? If you
5264                  * are bound-all you still might need to obey the V4--V6
5265                  * flags??? IMO this bound-all stuff needs to be removed!
5266                  */
5267                 return (1);
5268         }
5269         /* NOTE: all "scope" checks are done when local addresses are added */
5270         switch (destaddr->sa_family) {
5271 #ifdef INET6
5272         case AF_INET6:
5273                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5274                 break;
5275 #endif
5276 #ifdef INET
5277         case AF_INET:
5278                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5279                 break;
5280 #endif
5281         default:
5282                 /* invalid family, so it's unreachable */
5283                 answer = 0;
5284                 break;
5285         }
5286         return (answer);
5287 }
5288
5289 /*
5290  * update the inp_vflags on an endpoint
5291  */
5292 static void
5293 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5294 {
5295         struct sctp_laddr *laddr;
5296
5297         /* first clear the flag */
5298         inp->ip_inp.inp.inp_vflag = 0;
5299         /* set the flag based on addresses on the ep list */
5300         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5301                 if (laddr->ifa == NULL) {
5302                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5303                             __func__);
5304                         continue;
5305                 }
5306                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5307                         continue;
5308                 }
5309                 switch (laddr->ifa->address.sa.sa_family) {
5310 #ifdef INET6
5311                 case AF_INET6:
5312                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5313                         break;
5314 #endif
5315 #ifdef INET
5316                 case AF_INET:
5317                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5318                         break;
5319 #endif
5320                 default:
5321                         break;
5322                 }
5323         }
5324 }
5325
5326 /*
5327  * Add the address to the endpoint local address list There is nothing to be
5328  * done if we are bound to all addresses
5329  */
5330 void
5331 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5332 {
5333         struct sctp_laddr *laddr;
5334         int fnd, error = 0;
5335
5336         fnd = 0;
5337
5338         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5339                 /* You are already bound to all. You have it already */
5340                 return;
5341         }
5342 #ifdef INET6
5343         if (ifa->address.sa.sa_family == AF_INET6) {
5344                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5345                         /* Can't bind a non-useable addr. */
5346                         return;
5347                 }
5348         }
5349 #endif
5350         /* first, is it already present? */
5351         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5352                 if (laddr->ifa == ifa) {
5353                         fnd = 1;
5354                         break;
5355                 }
5356         }
5357
5358         if (fnd == 0) {
5359                 /* Not in the ep list */
5360                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5361                 if (error != 0)
5362                         return;
5363                 inp->laddr_count++;
5364                 /* update inp_vflag flags */
5365                 switch (ifa->address.sa.sa_family) {
5366 #ifdef INET6
5367                 case AF_INET6:
5368                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5369                         break;
5370 #endif
5371 #ifdef INET
5372                 case AF_INET:
5373                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5374                         break;
5375 #endif
5376                 default:
5377                         break;
5378                 }
5379         }
5380         return;
5381 }
5382
5383
5384 /*
5385  * select a new (hopefully reachable) destination net (should only be used
5386  * when we deleted an ep addr that is the only usable source address to reach
5387  * the destination net)
5388  */
5389 static void
5390 sctp_select_primary_destination(struct sctp_tcb *stcb)
5391 {
5392         struct sctp_nets *net;
5393
5394         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5395                 /* for now, we'll just pick the first reachable one we find */
5396                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5397                         continue;
5398                 if (sctp_destination_is_reachable(stcb,
5399                     (struct sockaddr *)&net->ro._l_addr)) {
5400                         /* found a reachable destination */
5401                         stcb->asoc.primary_destination = net;
5402                 }
5403         }
5404         /* I can't there from here! ...we're gonna die shortly... */
5405 }
5406
5407
5408 /*
5409  * Delete the address from the endpoint local address list There is nothing
5410  * to be done if we are bound to all addresses
5411  */
5412 void
5413 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5414 {
5415         struct sctp_laddr *laddr;
5416         int fnd;
5417
5418         fnd = 0;
5419         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5420                 /* You are already bound to all. You have it already */
5421                 return;
5422         }
5423         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5424                 if (laddr->ifa == ifa) {
5425                         fnd = 1;
5426                         break;
5427                 }
5428         }
5429         if (fnd && (inp->laddr_count < 2)) {
5430                 /* can't delete unless there are at LEAST 2 addresses */
5431                 return;
5432         }
5433         if (fnd) {
5434                 /*
5435                  * clean up any use of this address go through our
5436                  * associations and clear any last_used_address that match
5437                  * this one for each assoc, see if a new primary_destination
5438                  * is needed
5439                  */
5440                 struct sctp_tcb *stcb;
5441
5442                 /* clean up "next_addr_touse" */
5443                 if (inp->next_addr_touse == laddr)
5444                         /* delete this address */
5445                         inp->next_addr_touse = NULL;
5446
5447                 /* clean up "last_used_address" */
5448                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5449                         struct sctp_nets *net;
5450
5451                         SCTP_TCB_LOCK(stcb);
5452                         if (stcb->asoc.last_used_address == laddr)
5453                                 /* delete this address */
5454                                 stcb->asoc.last_used_address = NULL;
5455                         /*
5456                          * Now spin through all the nets and purge any ref
5457                          * to laddr
5458                          */
5459                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5460                                 if (net->ro._s_addr &&
5461                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5462                                         /* Yep, purge src address selected */
5463                                         sctp_rtentry_t *rt;
5464
5465                                         /* delete this address if cached */
5466                                         rt = net->ro.ro_rt;
5467                                         if (rt != NULL) {
5468                                                 RTFREE(rt);
5469                                                 net->ro.ro_rt = NULL;
5470                                         }
5471                                         sctp_free_ifa(net->ro._s_addr);
5472                                         net->ro._s_addr = NULL;
5473                                         net->src_addr_selected = 0;
5474                                 }
5475                         }
5476                         SCTP_TCB_UNLOCK(stcb);
5477                 }               /* for each tcb */
5478                 /* remove it from the ep list */
5479                 sctp_remove_laddr(laddr);
5480                 inp->laddr_count--;
5481                 /* update inp_vflag flags */
5482                 sctp_update_ep_vflag(inp);
5483         }
5484         return;
5485 }
5486
5487 /*
5488  * Add the address to the TCB local address restricted list.
5489  * This is a "pending" address list (eg. addresses waiting for an
5490  * ASCONF-ACK response) and cannot be used as a valid source address.
5491  */
5492 void
5493 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5494 {
5495         struct sctp_laddr *laddr;
5496         struct sctpladdr *list;
5497
5498         /*
5499          * Assumes TCB is locked.. and possibly the INP. May need to
5500          * confirm/fix that if we need it and is not the case.
5501          */
5502         list = &stcb->asoc.sctp_restricted_addrs;
5503
5504 #ifdef INET6
5505         if (ifa->address.sa.sa_family == AF_INET6) {
5506                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5507                         /* Can't bind a non-existent addr. */
5508                         return;
5509                 }
5510         }
5511 #endif
5512         /* does the address already exist? */
5513         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5514                 if (laddr->ifa == ifa) {
5515                         return;
5516                 }
5517         }
5518
5519         /* add to the list */
5520         (void)sctp_insert_laddr(list, ifa, 0);
5521         return;
5522 }
5523
5524 /*
5525  * insert an laddr entry with the given ifa for the desired list
5526  */
5527 int
5528 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5529 {
5530         struct sctp_laddr *laddr;
5531
5532         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5533         if (laddr == NULL) {
5534                 /* out of memory? */
5535                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5536                 return (EINVAL);
5537         }
5538         SCTP_INCR_LADDR_COUNT();
5539         bzero(laddr, sizeof(*laddr));
5540         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5541         laddr->ifa = ifa;
5542         laddr->action = act;
5543         atomic_add_int(&ifa->refcount, 1);
5544         /* insert it */
5545         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5546
5547         return (0);
5548 }
5549
5550 /*
5551  * Remove an laddr entry from the local address list (on an assoc)
5552  */
5553 void
5554 sctp_remove_laddr(struct sctp_laddr *laddr)
5555 {
5556
5557         /* remove from the list */
5558         LIST_REMOVE(laddr, sctp_nxt_addr);
5559         sctp_free_ifa(laddr->ifa);
5560         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5561         SCTP_DECR_LADDR_COUNT();
5562 }
5563
5564 /*
5565  * Remove a local address from the TCB local address restricted list
5566  */
5567 void
5568 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5569 {
5570         struct sctp_inpcb *inp;
5571         struct sctp_laddr *laddr;
5572
5573         /*
5574          * This is called by asconf work. It is assumed that a) The TCB is
5575          * locked and b) The INP is locked. This is true in as much as I can
5576          * trace through the entry asconf code where I did these locks.
5577          * Again, the ASCONF code is a bit different in that it does lock
5578          * the INP during its work often times. This must be since we don't
5579          * want other proc's looking up things while what they are looking
5580          * up is changing :-D
5581          */
5582
5583         inp = stcb->sctp_ep;
5584         /* if subset bound and don't allow ASCONF's, can't delete last */
5585         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5586             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5587                 if (stcb->sctp_ep->laddr_count < 2) {
5588                         /* can't delete last address */
5589                         return;
5590                 }
5591         }
5592         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5593                 /* remove the address if it exists */
5594                 if (laddr->ifa == NULL)
5595                         continue;
5596                 if (laddr->ifa == ifa) {
5597                         sctp_remove_laddr(laddr);
5598                         return;
5599                 }
5600         }
5601
5602         /* address not found! */
5603         return;
5604 }
5605
5606 /*
5607  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5608  */
5609 /* sysctl */
5610 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5611 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5612
5613
5614
5615 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5616 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5617 int *sctp_cpuarry = NULL;
5618 void
5619 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5620 {
5621         /* Queue a packet to a processor for the specified core */
5622         struct sctp_mcore_queue *qent;
5623         struct sctp_mcore_ctrl *wkq;
5624         int need_wake = 0;
5625
5626         if (sctp_mcore_workers == NULL) {
5627                 /* Something went way bad during setup */
5628                 sctp_input_with_port(m, off, 0);
5629                 return;
5630         }
5631         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5632             (sizeof(struct sctp_mcore_queue)),
5633             SCTP_M_MCORE);
5634         if (qent == NULL) {
5635                 /* This is trouble  */
5636                 sctp_input_with_port(m, off, 0);
5637                 return;
5638         }
5639         qent->vn = curvnet;
5640         qent->m = m;
5641         qent->off = off;
5642         qent->v6 = 0;
5643         wkq = &sctp_mcore_workers[cpu_to_use];
5644         SCTP_MCORE_QLOCK(wkq);
5645
5646         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5647         if (wkq->running == 0) {
5648                 need_wake = 1;
5649         }
5650         SCTP_MCORE_QUNLOCK(wkq);
5651         if (need_wake) {
5652                 wakeup(&wkq->running);
5653         }
5654 }
5655
5656 static void
5657 sctp_mcore_thread(void *arg)
5658 {
5659
5660         struct sctp_mcore_ctrl *wkq;
5661         struct sctp_mcore_queue *qent;
5662
5663         wkq = (struct sctp_mcore_ctrl *)arg;
5664         struct mbuf *m;
5665         int off, v6;
5666
5667         /* Wait for first tickle */
5668         SCTP_MCORE_LOCK(wkq);
5669         wkq->running = 0;
5670         msleep(&wkq->running,
5671             &wkq->core_mtx,
5672             0, "wait for pkt", 0);
5673         SCTP_MCORE_UNLOCK(wkq);
5674
5675         /* Bind to our cpu */
5676         thread_lock(curthread);
5677         sched_bind(curthread, wkq->cpuid);
5678         thread_unlock(curthread);
5679
5680         /* Now lets start working */
5681         SCTP_MCORE_LOCK(wkq);
5682         /* Now grab lock and go */
5683         for (;;) {
5684                 SCTP_MCORE_QLOCK(wkq);
5685 skip_sleep:
5686                 wkq->running = 1;
5687                 qent = TAILQ_FIRST(&wkq->que);
5688                 if (qent) {
5689                         TAILQ_REMOVE(&wkq->que, qent, next);
5690                         SCTP_MCORE_QUNLOCK(wkq);
5691                         CURVNET_SET(qent->vn);
5692                         m = qent->m;
5693                         off = qent->off;
5694                         v6 = qent->v6;
5695                         SCTP_FREE(qent, SCTP_M_MCORE);
5696                         if (v6 == 0) {
5697                                 sctp_input_with_port(m, off, 0);
5698                         } else {
5699                                 SCTP_PRINTF("V6 not yet supported\n");
5700                                 sctp_m_freem(m);
5701                         }
5702                         CURVNET_RESTORE();
5703                         SCTP_MCORE_QLOCK(wkq);
5704                 }
5705                 wkq->running = 0;
5706                 if (!TAILQ_EMPTY(&wkq->que)) {
5707                         goto skip_sleep;
5708                 }
5709                 SCTP_MCORE_QUNLOCK(wkq);
5710                 msleep(&wkq->running,
5711                     &wkq->core_mtx,
5712                     0, "wait for pkt", 0);
5713         }
5714 }
5715
5716 static void
5717 sctp_startup_mcore_threads(void)
5718 {
5719         int i, cpu;
5720
5721         if (mp_ncpus == 1)
5722                 return;
5723
5724         if (sctp_mcore_workers != NULL) {
5725                 /*
5726                  * Already been here in some previous vnet?
5727                  */
5728                 return;
5729         }
5730         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5731             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5732             SCTP_M_MCORE);
5733         if (sctp_mcore_workers == NULL) {
5734                 /* TSNH I hope */
5735                 return;
5736         }
5737         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5738             sizeof(struct sctp_mcore_ctrl)));
5739         /* Init the structures */
5740         for (i = 0; i <= mp_maxid; i++) {
5741                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5742                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5743                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5744                 sctp_mcore_workers[i].cpuid = i;
5745         }
5746         if (sctp_cpuarry == NULL) {
5747                 SCTP_MALLOC(sctp_cpuarry, int *,
5748                     (mp_ncpus * sizeof(int)),
5749                     SCTP_M_MCORE);
5750                 i = 0;
5751                 CPU_FOREACH(cpu) {
5752                         sctp_cpuarry[i] = cpu;
5753                         i++;
5754                 }
5755         }
5756         /* Now start them all */
5757         CPU_FOREACH(cpu) {
5758                 (void)kproc_create(sctp_mcore_thread,
5759                     (void *)&sctp_mcore_workers[cpu],
5760                     &sctp_mcore_workers[cpu].thread_proc,
5761                     RFPROC,
5762                     SCTP_KTHREAD_PAGES,
5763                     SCTP_MCORE_NAME);
5764
5765         }
5766 }
5767
5768 #endif
5769
5770 void
5771 sctp_pcb_init()
5772 {
5773         /*
5774          * SCTP initialization for the PCB structures should be called by
5775          * the sctp_init() funciton.
5776          */
5777         int i;
5778         struct timeval tv;
5779
5780         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5781                 /* error I was called twice */
5782                 return;
5783         }
5784         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5785
5786 #if defined(SCTP_LOCAL_TRACE_BUF)
5787         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5788 #endif
5789 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5790         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5791             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5792             SCTP_M_MCORE);
5793 #endif
5794         (void)SCTP_GETTIME_TIMEVAL(&tv);
5795 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5796         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5797         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5798         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5799 #else
5800         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5801         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5802         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5803 #endif
5804         /* init the empty list of (All) Endpoints */
5805         LIST_INIT(&SCTP_BASE_INFO(listhead));
5806
5807
5808         /* init the hash table of endpoints */
5809         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5810         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5811         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5812         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5813             &SCTP_BASE_INFO(hashasocmark));
5814         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5815             &SCTP_BASE_INFO(hashmark));
5816         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5817             &SCTP_BASE_INFO(hashtcpmark));
5818         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5819
5820
5821         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5822             &SCTP_BASE_INFO(hashvrfmark));
5823
5824         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5825             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5826         /* init the zones */
5827         /*
5828          * FIX ME: Should check for NULL returns, but if it does fail we are
5829          * doomed to panic anyways... add later maybe.
5830          */
5831         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5832             sizeof(struct sctp_inpcb), maxsockets);
5833
5834         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5835             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5836
5837         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5838             sizeof(struct sctp_laddr),
5839             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5840
5841         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5842             sizeof(struct sctp_nets),
5843             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5844
5845         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5846             sizeof(struct sctp_tmit_chunk),
5847             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5848
5849         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5850             sizeof(struct sctp_queued_to_read),
5851             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5852
5853         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5854             sizeof(struct sctp_stream_queue_pending),
5855             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5856
5857         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5858             sizeof(struct sctp_asconf),
5859             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5860
5861         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5862             sizeof(struct sctp_asconf_ack),
5863             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5864
5865
5866         /* Master Lock INIT for info structure */
5867         SCTP_INP_INFO_LOCK_INIT();
5868         SCTP_STATLOG_INIT_LOCK();
5869
5870         SCTP_IPI_COUNT_INIT();
5871         SCTP_IPI_ADDR_INIT();
5872 #ifdef SCTP_PACKET_LOGGING
5873         SCTP_IP_PKTLOG_INIT();
5874 #endif
5875         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5876
5877         SCTP_WQ_ADDR_INIT();
5878         /* not sure if we need all the counts */
5879         SCTP_BASE_INFO(ipi_count_ep) = 0;
5880         /* assoc/tcb zone info */
5881         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5882         /* local addrlist zone info */
5883         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5884         /* remote addrlist zone info */
5885         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5886         /* chunk info */
5887         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5888
5889         /* socket queue zone info */
5890         SCTP_BASE_INFO(ipi_count_readq) = 0;
5891
5892         /* stream out queue cont */
5893         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5894
5895         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5896         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5897
5898         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5899
5900         /* Init the TIMEWAIT list */
5901         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5902                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5903         }
5904         sctp_startup_iterator();
5905
5906 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5907         sctp_startup_mcore_threads();
5908 #endif
5909
5910         /*
5911          * INIT the default VRF which for BSD is the only one, other O/S's
5912          * may have more. But initially they must start with one and then
5913          * add the VRF's as addresses are added.
5914          */
5915         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5916 }
5917
5918 /*
5919  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5920  */
5921 void
5922 sctp_pcb_finish(void)
5923 {
5924         struct sctp_vrflist *vrf_bucket;
5925         struct sctp_vrf *vrf, *nvrf;
5926         struct sctp_ifn *ifn, *nifn;
5927         struct sctp_ifa *ifa, *nifa;
5928         struct sctpvtaghead *chain;
5929         struct sctp_tagblock *twait_block, *prev_twait_block;
5930         struct sctp_laddr *wi, *nwi;
5931         int i;
5932         struct sctp_iterator *it, *nit;
5933
5934         /*
5935          * In FreeBSD the iterator thread never exits but we do clean up.
5936          * The only way FreeBSD reaches here is if we have VRF's but we
5937          * still add the ifdef to make it compile on old versions.
5938          */
5939         SCTP_IPI_ITERATOR_WQ_LOCK();
5940         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5941                 if (it->vn != curvnet) {
5942                         continue;
5943                 }
5944                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5945                 if (it->function_atend != NULL) {
5946                         (*it->function_atend) (it->pointer, it->val);
5947                 }
5948                 SCTP_FREE(it, SCTP_M_ITER);
5949         }
5950         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5951         SCTP_ITERATOR_LOCK();
5952         if ((sctp_it_ctl.cur_it) &&
5953             (sctp_it_ctl.cur_it->vn == curvnet)) {
5954                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5955         }
5956         SCTP_ITERATOR_UNLOCK();
5957         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5958         SCTP_WQ_ADDR_LOCK();
5959         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5960                 LIST_REMOVE(wi, sctp_nxt_addr);
5961                 SCTP_DECR_LADDR_COUNT();
5962                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5963                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
5964                 }
5965                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5966         }
5967         SCTP_WQ_ADDR_UNLOCK();
5968
5969         /*
5970          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5971          * destroyed first).
5972          */
5973         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5974         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5975                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5976                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5977                                 /* free the ifa */
5978                                 LIST_REMOVE(ifa, next_bucket);
5979                                 LIST_REMOVE(ifa, next_ifa);
5980                                 SCTP_FREE(ifa, SCTP_M_IFA);
5981                         }
5982                         /* free the ifn */
5983                         LIST_REMOVE(ifn, next_bucket);
5984                         LIST_REMOVE(ifn, next_ifn);
5985                         SCTP_FREE(ifn, SCTP_M_IFN);
5986                 }
5987                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5988                 /* free the vrf */
5989                 LIST_REMOVE(vrf, next_vrf);
5990                 SCTP_FREE(vrf, SCTP_M_VRF);
5991         }
5992         /* free the vrf hashes */
5993         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5994         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5995
5996         /*
5997          * free the TIMEWAIT list elements malloc'd in the function
5998          * sctp_add_vtag_to_timewait()...
5999          */
6000         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6001                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
6002                 if (!LIST_EMPTY(chain)) {
6003                         prev_twait_block = NULL;
6004                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6005                                 if (prev_twait_block) {
6006                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6007                                 }
6008                                 prev_twait_block = twait_block;
6009                         }
6010                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6011                 }
6012         }
6013
6014         /* free the locks and mutexes */
6015 #ifdef SCTP_PACKET_LOGGING
6016         SCTP_IP_PKTLOG_DESTROY();
6017 #endif
6018         SCTP_IPI_ADDR_DESTROY();
6019         SCTP_STATLOG_DESTROY();
6020         SCTP_INP_INFO_LOCK_DESTROY();
6021
6022         SCTP_WQ_ADDR_DESTROY();
6023
6024         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6025         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6026         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6027         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6028         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6029         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6030         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6031         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6032         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6033         /* Get rid of other stuff to */
6034         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6035                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6036         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6037                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6038         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6039                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6040 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6041         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6042 #endif
6043 }
6044
6045
6046 int
6047 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6048     int offset, int limit,
6049     struct sockaddr *src, struct sockaddr *dst,
6050     struct sockaddr *altsa)
6051 {
6052         /*
6053          * grub through the INIT pulling addresses and loading them to the
6054          * nets structure in the asoc. The from address in the mbuf should
6055          * also be loaded (if it is not already). This routine can be called
6056          * with either INIT or INIT-ACK's as long as the m points to the IP
6057          * packet and the offset points to the beginning of the parameters.
6058          */
6059         struct sctp_inpcb *inp;
6060         struct sctp_nets *net, *nnet, *net_tmp;
6061         struct sctp_paramhdr *phdr, parm_buf;
6062         struct sctp_tcb *stcb_tmp;
6063         uint16_t ptype, plen;
6064         struct sockaddr *sa;
6065         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6066         struct sctp_auth_random *p_random = NULL;
6067         uint16_t random_len = 0;
6068         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6069         struct sctp_auth_hmac_algo *hmacs = NULL;
6070         uint16_t hmacs_len = 0;
6071         uint8_t saw_asconf = 0;
6072         uint8_t saw_asconf_ack = 0;
6073         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6074         struct sctp_auth_chunk_list *chunks = NULL;
6075         uint16_t num_chunks = 0;
6076         sctp_key_t *new_key;
6077         uint32_t keylen;
6078         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6079         uint8_t peer_supports_ecn;
6080         uint8_t peer_supports_prsctp;
6081         uint8_t peer_supports_auth;
6082         uint8_t peer_supports_asconf;
6083         uint8_t peer_supports_asconf_ack;
6084         uint8_t peer_supports_reconfig;
6085         uint8_t peer_supports_nrsack;
6086         uint8_t peer_supports_pktdrop;
6087
6088 #ifdef INET
6089         struct sockaddr_in sin;
6090
6091 #endif
6092 #ifdef INET6
6093         struct sockaddr_in6 sin6;
6094
6095 #endif
6096
6097         /* First get the destination address setup too. */
6098 #ifdef INET
6099         memset(&sin, 0, sizeof(sin));
6100         sin.sin_family = AF_INET;
6101         sin.sin_len = sizeof(sin);
6102         sin.sin_port = stcb->rport;
6103 #endif
6104 #ifdef INET6
6105         memset(&sin6, 0, sizeof(sin6));
6106         sin6.sin6_family = AF_INET6;
6107         sin6.sin6_len = sizeof(struct sockaddr_in6);
6108         sin6.sin6_port = stcb->rport;
6109 #endif
6110         if (altsa) {
6111                 sa = altsa;
6112         } else {
6113                 sa = src;
6114         }
6115         peer_supports_ecn = 0;
6116         peer_supports_prsctp = 0;
6117         peer_supports_auth = 0;
6118         peer_supports_asconf = 0;
6119         peer_supports_reconfig = 0;
6120         peer_supports_nrsack = 0;
6121         peer_supports_pktdrop = 0;
6122         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6123                 /* mark all addresses that we have currently on the list */
6124                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6125         }
6126         /* does the source address already exist? if so skip it */
6127         inp = stcb->sctp_ep;
6128         atomic_add_int(&stcb->asoc.refcnt, 1);
6129         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6130         atomic_add_int(&stcb->asoc.refcnt, -1);
6131
6132         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6133                 /* we must add the source address */
6134                 /* no scope set here since we have a tcb already. */
6135                 switch (sa->sa_family) {
6136 #ifdef INET
6137                 case AF_INET:
6138                         if (stcb->asoc.scope.ipv4_addr_legal) {
6139                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6140                                         return (-1);
6141                                 }
6142                         }
6143                         break;
6144 #endif
6145 #ifdef INET6
6146                 case AF_INET6:
6147                         if (stcb->asoc.scope.ipv6_addr_legal) {
6148                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6149                                         return (-2);
6150                                 }
6151                         }
6152                         break;
6153 #endif
6154                 default:
6155                         break;
6156                 }
6157         } else {
6158                 if (net_tmp != NULL && stcb_tmp == stcb) {
6159                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6160                 } else if (stcb_tmp != stcb) {
6161                         /* It belongs to another association? */
6162                         if (stcb_tmp)
6163                                 SCTP_TCB_UNLOCK(stcb_tmp);
6164                         return (-3);
6165                 }
6166         }
6167         if (stcb->asoc.state == 0) {
6168                 /* the assoc was freed? */
6169                 return (-4);
6170         }
6171         /* now we must go through each of the params. */
6172         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6173         while (phdr) {
6174                 ptype = ntohs(phdr->param_type);
6175                 plen = ntohs(phdr->param_length);
6176                 /*
6177                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6178                  * (uint32_t)ptype, (int)plen);
6179                  */
6180                 if (offset + plen > limit) {
6181                         break;
6182                 }
6183                 if (plen == 0) {
6184                         break;
6185                 }
6186 #ifdef INET
6187                 if (ptype == SCTP_IPV4_ADDRESS) {
6188                         if (stcb->asoc.scope.ipv4_addr_legal) {
6189                                 struct sctp_ipv4addr_param *p4, p4_buf;
6190
6191                                 /* ok get the v4 address and check/add */
6192                                 phdr = sctp_get_next_param(m, offset,
6193                                     (struct sctp_paramhdr *)&p4_buf,
6194                                     sizeof(p4_buf));
6195                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6196                                     phdr == NULL) {
6197                                         return (-5);
6198                                 }
6199                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6200                                 sin.sin_addr.s_addr = p4->addr;
6201                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6202                                         /* Skip multi-cast addresses */
6203                                         goto next_param;
6204                                 }
6205                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6206                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6207                                         goto next_param;
6208                                 }
6209                                 sa = (struct sockaddr *)&sin;
6210                                 inp = stcb->sctp_ep;
6211                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6212                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6213                                     dst, stcb);
6214                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6215
6216                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6217                                     inp == NULL) {
6218                                         /* we must add the source address */
6219                                         /*
6220                                          * no scope set since we have a tcb
6221                                          * already
6222                                          */
6223
6224                                         /*
6225                                          * we must validate the state again
6226                                          * here
6227                                          */
6228                         add_it_now:
6229                                         if (stcb->asoc.state == 0) {
6230                                                 /* the assoc was freed? */
6231                                                 return (-7);
6232                                         }
6233                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6234                                                 return (-8);
6235                                         }
6236                                 } else if (stcb_tmp == stcb) {
6237                                         if (stcb->asoc.state == 0) {
6238                                                 /* the assoc was freed? */
6239                                                 return (-10);
6240                                         }
6241                                         if (net != NULL) {
6242                                                 /* clear flag */
6243                                                 net->dest_state &=
6244                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6245                                         }
6246                                 } else {
6247                                         /*
6248                                          * strange, address is in another
6249                                          * assoc? straighten out locks.
6250                                          */
6251                                         if (stcb_tmp) {
6252                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6253                                                         struct mbuf *op_err;
6254                                                         char msg[SCTP_DIAG_INFO_LEN];
6255
6256                                                         /*
6257                                                          * in setup state we
6258                                                          * abort this guy
6259                                                          */
6260                                                         snprintf(msg, sizeof(msg),
6261                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6262                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6263                                                             msg);
6264                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6265                                                             stcb_tmp, op_err,
6266                                                             SCTP_SO_NOT_LOCKED);
6267                                                         goto add_it_now;
6268                                                 }
6269                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6270                                         }
6271                                         if (stcb->asoc.state == 0) {
6272                                                 /* the assoc was freed? */
6273                                                 return (-12);
6274                                         }
6275                                         return (-13);
6276                                 }
6277                         }
6278                 } else
6279 #endif
6280 #ifdef INET6
6281                 if (ptype == SCTP_IPV6_ADDRESS) {
6282                         if (stcb->asoc.scope.ipv6_addr_legal) {
6283                                 /* ok get the v6 address and check/add */
6284                                 struct sctp_ipv6addr_param *p6, p6_buf;
6285
6286                                 phdr = sctp_get_next_param(m, offset,
6287                                     (struct sctp_paramhdr *)&p6_buf,
6288                                     sizeof(p6_buf));
6289                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6290                                     phdr == NULL) {
6291                                         return (-14);
6292                                 }
6293                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6294                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6295                                     sizeof(p6->addr));
6296                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6297                                         /* Skip multi-cast addresses */
6298                                         goto next_param;
6299                                 }
6300                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6301                                         /*
6302                                          * Link local make no sense without
6303                                          * scope
6304                                          */
6305                                         goto next_param;
6306                                 }
6307                                 sa = (struct sockaddr *)&sin6;
6308                                 inp = stcb->sctp_ep;
6309                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6310                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6311                                     dst, stcb);
6312                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6313                                 if (stcb_tmp == NULL &&
6314                                     (inp == stcb->sctp_ep || inp == NULL)) {
6315                                         /*
6316                                          * we must validate the state again
6317                                          * here
6318                                          */
6319                         add_it_now6:
6320                                         if (stcb->asoc.state == 0) {
6321                                                 /* the assoc was freed? */
6322                                                 return (-16);
6323                                         }
6324                                         /*
6325                                          * we must add the address, no scope
6326                                          * set
6327                                          */
6328                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6329                                                 return (-17);
6330                                         }
6331                                 } else if (stcb_tmp == stcb) {
6332                                         /*
6333                                          * we must validate the state again
6334                                          * here
6335                                          */
6336                                         if (stcb->asoc.state == 0) {
6337                                                 /* the assoc was freed? */
6338                                                 return (-19);
6339                                         }
6340                                         if (net != NULL) {
6341                                                 /* clear flag */
6342                                                 net->dest_state &=
6343                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6344                                         }
6345                                 } else {
6346                                         /*
6347                                          * strange, address is in another
6348                                          * assoc? straighten out locks.
6349                                          */
6350                                         if (stcb_tmp) {
6351                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6352                                                         struct mbuf *op_err;
6353                                                         char msg[SCTP_DIAG_INFO_LEN];
6354
6355                                                         /*
6356                                                          * in setup state we
6357                                                          * abort this guy
6358                                                          */
6359                                                         snprintf(msg, sizeof(msg),
6360                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6361                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6362                                                             msg);
6363                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6364                                                             stcb_tmp, op_err,
6365                                                             SCTP_SO_NOT_LOCKED);
6366                                                         goto add_it_now6;
6367                                                 }
6368                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6369                                         }
6370                                         if (stcb->asoc.state == 0) {
6371                                                 /* the assoc was freed? */
6372                                                 return (-21);
6373                                         }
6374                                         return (-22);
6375                                 }
6376                         }
6377                 } else
6378 #endif
6379                 if (ptype == SCTP_ECN_CAPABLE) {
6380                         peer_supports_ecn = 1;
6381                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6382                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6383                                 struct sctp_adaptation_layer_indication ai,
6384                                                                 *aip;
6385
6386                                 phdr = sctp_get_next_param(m, offset,
6387                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6388                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6389                                 if (aip) {
6390                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6391                                         stcb->asoc.adaptation_needed = 1;
6392                                 }
6393                         }
6394                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6395                         struct sctp_asconf_addr_param lstore, *fee;
6396                         int lptype;
6397                         struct sockaddr *lsa = NULL;
6398
6399 #ifdef INET
6400                         struct sctp_asconf_addrv4_param *fii;
6401
6402 #endif
6403
6404                         if (stcb->asoc.asconf_supported == 0) {
6405                                 return (-100);
6406                         }
6407                         if (plen > sizeof(lstore)) {
6408                                 return (-23);
6409                         }
6410                         phdr = sctp_get_next_param(m, offset,
6411                             (struct sctp_paramhdr *)&lstore,
6412                             min(plen, sizeof(lstore)));
6413                         if (phdr == NULL) {
6414                                 return (-24);
6415                         }
6416                         fee = (struct sctp_asconf_addr_param *)phdr;
6417                         lptype = ntohs(fee->addrp.ph.param_type);
6418                         switch (lptype) {
6419 #ifdef INET
6420                         case SCTP_IPV4_ADDRESS:
6421                                 if (plen !=
6422                                     sizeof(struct sctp_asconf_addrv4_param)) {
6423                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6424                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6425                                             plen);
6426                                 } else {
6427                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6428                                         sin.sin_addr.s_addr = fii->addrp.addr;
6429                                         lsa = (struct sockaddr *)&sin;
6430                                 }
6431                                 break;
6432 #endif
6433 #ifdef INET6
6434                         case SCTP_IPV6_ADDRESS:
6435                                 if (plen !=
6436                                     sizeof(struct sctp_asconf_addr_param)) {
6437                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6438                                             (int)sizeof(struct sctp_asconf_addr_param),
6439                                             plen);
6440                                 } else {
6441                                         memcpy(sin6.sin6_addr.s6_addr,
6442                                             fee->addrp.addr,
6443                                             sizeof(fee->addrp.addr));
6444                                         lsa = (struct sockaddr *)&sin6;
6445                                 }
6446                                 break;
6447 #endif
6448                         default:
6449                                 break;
6450                         }
6451                         if (lsa) {
6452                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6453                         }
6454                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6455                         stcb->asoc.peer_supports_nat = 1;
6456                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6457                         /* Peer supports pr-sctp */
6458                         peer_supports_prsctp = 1;
6459                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6460                         /* A supported extension chunk */
6461                         struct sctp_supported_chunk_types_param *pr_supported;
6462                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6463                         int num_ent, i;
6464
6465                         phdr = sctp_get_next_param(m, offset,
6466                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6467                         if (phdr == NULL) {
6468                                 return (-25);
6469                         }
6470                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6471                         num_ent = plen - sizeof(struct sctp_paramhdr);
6472                         for (i = 0; i < num_ent; i++) {
6473                                 switch (pr_supported->chunk_types[i]) {
6474                                 case SCTP_ASCONF:
6475                                         peer_supports_asconf = 1;
6476                                         break;
6477                                 case SCTP_ASCONF_ACK:
6478                                         peer_supports_asconf_ack = 1;
6479                                         break;
6480                                 case SCTP_FORWARD_CUM_TSN:
6481                                         peer_supports_prsctp = 1;
6482                                         break;
6483                                 case SCTP_PACKET_DROPPED:
6484                                         peer_supports_pktdrop = 1;
6485                                         break;
6486                                 case SCTP_NR_SELECTIVE_ACK:
6487                                         peer_supports_nrsack = 1;
6488                                         break;
6489                                 case SCTP_STREAM_RESET:
6490                                         peer_supports_reconfig = 1;
6491                                         break;
6492                                 case SCTP_AUTHENTICATION:
6493                                         peer_supports_auth = 1;
6494                                         break;
6495                                 default:
6496                                         /* one I have not learned yet */
6497                                         break;
6498
6499                                 }
6500                         }
6501                 } else if (ptype == SCTP_RANDOM) {
6502                         if (plen > sizeof(random_store))
6503                                 break;
6504                         if (got_random) {
6505                                 /* already processed a RANDOM */
6506                                 goto next_param;
6507                         }
6508                         phdr = sctp_get_next_param(m, offset,
6509                             (struct sctp_paramhdr *)random_store,
6510                             min(sizeof(random_store), plen));
6511                         if (phdr == NULL)
6512                                 return (-26);
6513                         p_random = (struct sctp_auth_random *)phdr;
6514                         random_len = plen - sizeof(*p_random);
6515                         /* enforce the random length */
6516                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6517                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6518                                 return (-27);
6519                         }
6520                         got_random = 1;
6521                 } else if (ptype == SCTP_HMAC_LIST) {
6522                         uint16_t num_hmacs;
6523                         uint16_t i;
6524
6525                         if (plen > sizeof(hmacs_store))
6526                                 break;
6527                         if (got_hmacs) {
6528                                 /* already processed a HMAC list */
6529                                 goto next_param;
6530                         }
6531                         phdr = sctp_get_next_param(m, offset,
6532                             (struct sctp_paramhdr *)hmacs_store,
6533                             min(plen, sizeof(hmacs_store)));
6534                         if (phdr == NULL)
6535                                 return (-28);
6536                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6537                         hmacs_len = plen - sizeof(*hmacs);
6538                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6539                         /* validate the hmac list */
6540                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6541                                 return (-29);
6542                         }
6543                         if (stcb->asoc.peer_hmacs != NULL)
6544                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6545                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6546                         if (stcb->asoc.peer_hmacs != NULL) {
6547                                 for (i = 0; i < num_hmacs; i++) {
6548                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6549                                             ntohs(hmacs->hmac_ids[i]));
6550                                 }
6551                         }
6552                         got_hmacs = 1;
6553                 } else if (ptype == SCTP_CHUNK_LIST) {
6554                         int i;
6555
6556                         if (plen > sizeof(chunks_store))
6557                                 break;
6558                         if (got_chklist) {
6559                                 /* already processed a Chunks list */
6560                                 goto next_param;
6561                         }
6562                         phdr = sctp_get_next_param(m, offset,
6563                             (struct sctp_paramhdr *)chunks_store,
6564                             min(plen, sizeof(chunks_store)));
6565                         if (phdr == NULL)
6566                                 return (-30);
6567                         chunks = (struct sctp_auth_chunk_list *)phdr;
6568                         num_chunks = plen - sizeof(*chunks);
6569                         if (stcb->asoc.peer_auth_chunks != NULL)
6570                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6571                         else
6572                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6573                         for (i = 0; i < num_chunks; i++) {
6574                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6575                                     stcb->asoc.peer_auth_chunks);
6576                                 /* record asconf/asconf-ack if listed */
6577                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6578                                         saw_asconf = 1;
6579                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6580                                         saw_asconf_ack = 1;
6581
6582                         }
6583                         got_chklist = 1;
6584                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6585                             (ptype == SCTP_STATE_COOKIE) ||
6586                             (ptype == SCTP_UNRECOG_PARAM) ||
6587                             (ptype == SCTP_COOKIE_PRESERVE) ||
6588                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6589                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6590                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6591                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6592                     (ptype == SCTP_SUCCESS_REPORT)) {
6593                          /* don't care */ ;
6594                 } else {
6595                         if ((ptype & 0x8000) == 0x0000) {
6596                                 /*
6597                                  * must stop processing the rest of the
6598                                  * param's. Any report bits were handled
6599                                  * with the call to
6600                                  * sctp_arethere_unrecognized_parameters()
6601                                  * when the INIT or INIT-ACK was first seen.
6602                                  */
6603                                 break;
6604                         }
6605                 }
6606
6607 next_param:
6608                 offset += SCTP_SIZE32(plen);
6609                 if (offset >= limit) {
6610                         break;
6611                 }
6612                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6613                     sizeof(parm_buf));
6614         }
6615         /* Now check to see if we need to purge any addresses */
6616         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6617                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6618                     SCTP_ADDR_NOT_IN_ASSOC) {
6619                         /* This address has been removed from the asoc */
6620                         /* remove and free it */
6621                         stcb->asoc.numnets--;
6622                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6623                         sctp_free_remote_addr(net);
6624                         if (net == stcb->asoc.primary_destination) {
6625                                 stcb->asoc.primary_destination = NULL;
6626                                 sctp_select_primary_destination(stcb);
6627                         }
6628                 }
6629         }
6630         if ((stcb->asoc.ecn_supported == 1) &&
6631             (peer_supports_ecn == 0)) {
6632                 stcb->asoc.ecn_supported = 0;
6633         }
6634         if ((stcb->asoc.prsctp_supported == 1) &&
6635             (peer_supports_prsctp == 0)) {
6636                 stcb->asoc.prsctp_supported = 0;
6637         }
6638         if ((stcb->asoc.auth_supported == 1) &&
6639             ((peer_supports_auth == 0) ||
6640             (got_random == 0) || (got_hmacs == 0))) {
6641                 stcb->asoc.auth_supported = 0;
6642         }
6643         if ((stcb->asoc.asconf_supported == 1) &&
6644             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6645             (stcb->asoc.auth_supported == 0) ||
6646             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6647                 stcb->asoc.asconf_supported = 0;
6648         }
6649         if ((stcb->asoc.reconfig_supported == 1) &&
6650             (peer_supports_reconfig == 0)) {
6651                 stcb->asoc.reconfig_supported = 0;
6652         }
6653         if ((stcb->asoc.nrsack_supported == 1) &&
6654             (peer_supports_nrsack == 0)) {
6655                 stcb->asoc.nrsack_supported = 0;
6656         }
6657         if ((stcb->asoc.pktdrop_supported == 1) &&
6658             (peer_supports_pktdrop == 0)) {
6659                 stcb->asoc.pktdrop_supported = 0;
6660         }
6661         /* validate authentication required parameters */
6662         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6663                 /* peer does not support auth but sent a chunks list? */
6664                 return (-31);
6665         }
6666         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6667                 /* peer supports asconf but not auth? */
6668                 return (-32);
6669         } else if ((peer_supports_asconf == 1) &&
6670                     (peer_supports_auth == 1) &&
6671             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6672                 return (-33);
6673         }
6674         /* concatenate the full random key */
6675         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6676         if (chunks != NULL) {
6677                 keylen += sizeof(*chunks) + num_chunks;
6678         }
6679         new_key = sctp_alloc_key(keylen);
6680         if (new_key != NULL) {
6681                 /* copy in the RANDOM */
6682                 if (p_random != NULL) {
6683                         keylen = sizeof(*p_random) + random_len;
6684                         bcopy(p_random, new_key->key, keylen);
6685                 }
6686                 /* append in the AUTH chunks */
6687                 if (chunks != NULL) {
6688                         bcopy(chunks, new_key->key + keylen,
6689                             sizeof(*chunks) + num_chunks);
6690                         keylen += sizeof(*chunks) + num_chunks;
6691                 }
6692                 /* append in the HMACs */
6693                 if (hmacs != NULL) {
6694                         bcopy(hmacs, new_key->key + keylen,
6695                             sizeof(*hmacs) + hmacs_len);
6696                 }
6697         } else {
6698                 /* failed to get memory for the key */
6699                 return (-34);
6700         }
6701         if (stcb->asoc.authinfo.peer_random != NULL)
6702                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6703         stcb->asoc.authinfo.peer_random = new_key;
6704         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6705         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6706
6707         return (0);
6708 }
6709
6710 int
6711 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6712     struct sctp_nets *net)
6713 {
6714         /* make sure the requested primary address exists in the assoc */
6715         if (net == NULL && sa)
6716                 net = sctp_findnet(stcb, sa);
6717
6718         if (net == NULL) {
6719                 /* didn't find the requested primary address! */
6720                 return (-1);
6721         } else {
6722                 /* set the primary address */
6723                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6724                         /* Must be confirmed, so queue to set */
6725                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6726                         return (0);
6727                 }
6728                 stcb->asoc.primary_destination = net;
6729                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6730                         sctp_free_remote_addr(stcb->asoc.alternate);
6731                         stcb->asoc.alternate = NULL;
6732                 }
6733                 net = TAILQ_FIRST(&stcb->asoc.nets);
6734                 if (net != stcb->asoc.primary_destination) {
6735                         /*
6736                          * first one on the list is NOT the primary
6737                          * sctp_cmpaddr() is much more efficient if the
6738                          * primary is the first on the list, make it so.
6739                          */
6740                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6741                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6742                 }
6743                 return (0);
6744         }
6745 }
6746
6747 int
6748 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6749 {
6750         /*
6751          * This function serves two purposes. It will see if a TAG can be
6752          * re-used and return 1 for yes it is ok and 0 for don't use that
6753          * tag. A secondary function it will do is purge out old tags that
6754          * can be removed.
6755          */
6756         struct sctpvtaghead *chain;
6757         struct sctp_tagblock *twait_block;
6758         struct sctpasochead *head;
6759         struct sctp_tcb *stcb;
6760         int i;
6761
6762         SCTP_INP_INFO_RLOCK();
6763         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6764             SCTP_BASE_INFO(hashasocmark))];
6765         LIST_FOREACH(stcb, head, sctp_asocs) {
6766                 /*
6767                  * We choose not to lock anything here. TCB's can't be
6768                  * removed since we have the read lock, so they can't be
6769                  * freed on us, same thing for the INP. I may be wrong with
6770                  * this assumption, but we will go with it for now :-)
6771                  */
6772                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6773                         continue;
6774                 }
6775                 if (stcb->asoc.my_vtag == tag) {
6776                         /* candidate */
6777                         if (stcb->rport != rport) {
6778                                 continue;
6779                         }
6780                         if (stcb->sctp_ep->sctp_lport != lport) {
6781                                 continue;
6782                         }
6783                         /* Its a used tag set */
6784                         SCTP_INP_INFO_RUNLOCK();
6785                         return (0);
6786                 }
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 }