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         struct sctp_tcb *stcb;
2260         struct sctp_inpcb *inp;
2261
2262         if (sh->v_tag) {
2263                 /* we only go down this path if vtag is non-zero */
2264                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2265                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2266                 if (stcb) {
2267                         return (stcb);
2268                 }
2269         }
2270         if (inp_p) {
2271                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2272                     1, vrf_id);
2273                 inp = *inp_p;
2274         } else {
2275                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2276                     1, vrf_id);
2277         }
2278         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2279         if (stcb == NULL && inp) {
2280                 /* Found a EP but not this address */
2281                 if ((ch->chunk_type == SCTP_INITIATION) ||
2282                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2283                         /*-
2284                          * special hook, we do NOT return linp or an
2285                          * association that is linked to an existing
2286                          * association that is under the TCP pool (i.e. no
2287                          * listener exists). The endpoint finding routine
2288                          * will always find a listener before examining the
2289                          * TCP pool.
2290                          */
2291                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2292                                 if (inp_p) {
2293                                         *inp_p = NULL;
2294                                 }
2295                                 return (NULL);
2296                         }
2297                         stcb = sctp_findassociation_special_addr(m,
2298                             offset, sh, &inp, netp, dst);
2299                         if (inp_p != NULL) {
2300                                 *inp_p = inp;
2301                         }
2302                 }
2303         }
2304         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2305         return (stcb);
2306 }
2307
2308 /*
2309  * lookup an association by an ASCONF lookup address.
2310  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2311  */
2312 struct sctp_tcb *
2313 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2314     struct sockaddr *dst, struct sctphdr *sh,
2315     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2316 {
2317         struct sctp_tcb *stcb;
2318         union sctp_sockstore remote_store;
2319         struct sctp_paramhdr parm_buf, *phdr;
2320         int ptype;
2321         int zero_address = 0;
2322
2323 #ifdef INET
2324         struct sockaddr_in *sin;
2325
2326 #endif
2327 #ifdef INET6
2328         struct sockaddr_in6 *sin6;
2329
2330 #endif
2331
2332         memset(&remote_store, 0, sizeof(remote_store));
2333         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2334             &parm_buf, sizeof(struct sctp_paramhdr));
2335         if (phdr == NULL) {
2336                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2337                     __func__);
2338                 return NULL;
2339         }
2340         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2341         /* get the correlation address */
2342         switch (ptype) {
2343 #ifdef INET6
2344         case SCTP_IPV6_ADDRESS:
2345                 {
2346                         /* ipv6 address param */
2347                         struct sctp_ipv6addr_param *p6, p6_buf;
2348
2349                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2350                                 return NULL;
2351                         }
2352                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2353                             offset + sizeof(struct sctp_asconf_chunk),
2354                             &p6_buf.ph, sizeof(*p6));
2355                         if (p6 == NULL) {
2356                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2357                                     __func__);
2358                                 return (NULL);
2359                         }
2360                         sin6 = &remote_store.sin6;
2361                         sin6->sin6_family = AF_INET6;
2362                         sin6->sin6_len = sizeof(*sin6);
2363                         sin6->sin6_port = sh->src_port;
2364                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2365                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2366                                 zero_address = 1;
2367                         break;
2368                 }
2369 #endif
2370 #ifdef INET
2371         case SCTP_IPV4_ADDRESS:
2372                 {
2373                         /* ipv4 address param */
2374                         struct sctp_ipv4addr_param *p4, p4_buf;
2375
2376                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2377                                 return NULL;
2378                         }
2379                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2380                             offset + sizeof(struct sctp_asconf_chunk),
2381                             &p4_buf.ph, sizeof(*p4));
2382                         if (p4 == NULL) {
2383                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2384                                     __func__);
2385                                 return (NULL);
2386                         }
2387                         sin = &remote_store.sin;
2388                         sin->sin_family = AF_INET;
2389                         sin->sin_len = sizeof(*sin);
2390                         sin->sin_port = sh->src_port;
2391                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2392                         if (sin->sin_addr.s_addr == INADDR_ANY)
2393                                 zero_address = 1;
2394                         break;
2395                 }
2396 #endif
2397         default:
2398                 /* invalid address param type */
2399                 return NULL;
2400         }
2401
2402         if (zero_address) {
2403                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2404                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2405                 if (stcb != NULL) {
2406                         SCTP_INP_DECR_REF(*inp_p);
2407                 }
2408         } else {
2409                 stcb = sctp_findassociation_ep_addr(inp_p,
2410                     &remote_store.sa, netp,
2411                     dst, NULL);
2412         }
2413         return (stcb);
2414 }
2415
2416
2417 /*
2418  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2419  * addresses. This way if we don't get a bind we by default pick a ephemeral
2420  * port with all addresses bound.
2421  */
2422 int
2423 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2424 {
2425         /*
2426          * we get called when a new endpoint starts up. We need to allocate
2427          * the sctp_inpcb structure from the zone and init it. Mark it as
2428          * unbound and find a port that we can use as an ephemeral with
2429          * INADDR_ANY. If the user binds later no problem we can then add in
2430          * the specific addresses. And setup the default parameters for the
2431          * EP.
2432          */
2433         int i, error;
2434         struct sctp_inpcb *inp;
2435         struct sctp_pcb *m;
2436         struct timeval time;
2437         sctp_sharedkey_t *null_key;
2438
2439         error = 0;
2440
2441         SCTP_INP_INFO_WLOCK();
2442         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2443         if (inp == NULL) {
2444                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2445                 SCTP_INP_INFO_WUNLOCK();
2446                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2447                 return (ENOBUFS);
2448         }
2449         /* zap it */
2450         bzero(inp, sizeof(*inp));
2451
2452         /* bump generations */
2453         /* setup socket pointers */
2454         inp->sctp_socket = so;
2455         inp->ip_inp.inp.inp_socket = so;
2456         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2457 #ifdef INET6
2458         if (INP_SOCKAF(so) == AF_INET6) {
2459                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2460                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2461                 }
2462                 if (MODULE_GLOBAL(ip6_v6only)) {
2463                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2464                 }
2465         }
2466 #endif
2467         inp->sctp_associd_counter = 1;
2468         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2469         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2470         inp->max_cwnd = 0;
2471         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2472         inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable);
2473         inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable);
2474         inp->auth_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_auth_enable);
2475         inp->asconf_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_asconf_enable);
2476         inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2477         inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2478         inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2479         inp->fibnum = so->so_fibnum;
2480         /* init the small hash table we use to track asocid <-> tcb */
2481         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2482         if (inp->sctp_asocidhash == NULL) {
2483                 crfree(inp->ip_inp.inp.inp_cred);
2484                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2485                 SCTP_INP_INFO_WUNLOCK();
2486                 return (ENOBUFS);
2487         }
2488 #ifdef IPSEC
2489         error = ipsec_init_policy(so, &inp->ip_inp.inp.inp_sp);
2490         if (error != 0) {
2491                 crfree(inp->ip_inp.inp.inp_cred);
2492                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2493                 SCTP_INP_INFO_WUNLOCK();
2494                 return error;
2495         }
2496 #endif                          /* IPSEC */
2497         SCTP_INCR_EP_COUNT();
2498         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2499         SCTP_INP_INFO_WUNLOCK();
2500
2501         so->so_pcb = (caddr_t)inp;
2502
2503         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2504                 /* UDP style socket */
2505                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2506                     SCTP_PCB_FLAGS_UNBOUND);
2507                 /* Be sure it is NON-BLOCKING IO for UDP */
2508                 /* SCTP_SET_SO_NBIO(so); */
2509         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2510                 /* TCP style socket */
2511                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2512                     SCTP_PCB_FLAGS_UNBOUND);
2513                 /* Be sure we have blocking IO by default */
2514                 SCTP_CLEAR_SO_NBIO(so);
2515         } else {
2516                 /*
2517                  * unsupported socket type (RAW, etc)- in case we missed it
2518                  * in protosw
2519                  */
2520                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2521                 so->so_pcb = NULL;
2522                 crfree(inp->ip_inp.inp.inp_cred);
2523 #ifdef IPSEC
2524                 ipsec_delete_pcbpolicy(&inp->ip_inp.inp);
2525 #endif
2526                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2527                 return (EOPNOTSUPP);
2528         }
2529         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2530                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2531                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2532         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2533                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2534                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2535         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2536                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2537                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2538         }
2539         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2540             &inp->sctp_hashmark);
2541         if (inp->sctp_tcbhash == NULL) {
2542                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2543                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2544                 so->so_pcb = NULL;
2545                 crfree(inp->ip_inp.inp.inp_cred);
2546 #ifdef IPSEC
2547                 ipsec_delete_pcbpolicy(&inp->ip_inp.inp);
2548 #endif
2549                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2550                 return (ENOBUFS);
2551         }
2552         inp->def_vrf_id = vrf_id;
2553
2554         SCTP_INP_INFO_WLOCK();
2555         SCTP_INP_LOCK_INIT(inp);
2556         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2557         SCTP_INP_READ_INIT(inp);
2558         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2559         /* lock the new ep */
2560         SCTP_INP_WLOCK(inp);
2561
2562         /* add it to the info area */
2563         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2564         SCTP_INP_INFO_WUNLOCK();
2565
2566         TAILQ_INIT(&inp->read_queue);
2567         LIST_INIT(&inp->sctp_addr_list);
2568
2569         LIST_INIT(&inp->sctp_asoc_list);
2570
2571 #ifdef SCTP_TRACK_FREED_ASOCS
2572         /* TEMP CODE */
2573         LIST_INIT(&inp->sctp_asoc_free_list);
2574 #endif
2575         /* Init the timer structure for signature change */
2576         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2577         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2578
2579         /* now init the actual endpoint default data */
2580         m = &inp->sctp_ep;
2581
2582         /* setup the base timeout information */
2583         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2584         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2585         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2586         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2587         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2588         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2589         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2590         /* all max/min max are in ms */
2591         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2592         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2593         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2594         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2595         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2596         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2597         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2598         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2599         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2600         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2601         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2602         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2603         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2604
2605         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2606         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2607         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2608         /* number of streams to pre-open on a association */
2609         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2610
2611         /* Add adaptation cookie */
2612         m->adaptation_layer_indicator = 0;
2613         m->adaptation_layer_indicator_provided = 0;
2614
2615         /* seed random number generator */
2616         m->random_counter = 1;
2617         m->store_at = SCTP_SIGNATURE_SIZE;
2618         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2619         sctp_fill_random_store(m);
2620
2621         /* Minimum cookie size */
2622         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2623             sizeof(struct sctp_state_cookie);
2624         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2625
2626         /* Setup the initial secret */
2627         (void)SCTP_GETTIME_TIMEVAL(&time);
2628         m->time_of_secret_change = time.tv_sec;
2629
2630         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2631                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2632         }
2633         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2634
2635         /* How long is a cookie good for ? */
2636         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2637         /*
2638          * Initialize authentication parameters
2639          */
2640         m->local_hmacs = sctp_default_supported_hmaclist();
2641         m->local_auth_chunks = sctp_alloc_chunklist();
2642         if (inp->asconf_supported) {
2643                 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2644                 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2645         }
2646         m->default_dscp = 0;
2647 #ifdef INET6
2648         m->default_flowlabel = 0;
2649 #endif
2650         m->port = 0;            /* encapsulation disabled by default */
2651         LIST_INIT(&m->shared_keys);
2652         /* add default NULL key as key id 0 */
2653         null_key = sctp_alloc_sharedkey();
2654         sctp_insert_sharedkey(&m->shared_keys, null_key);
2655         SCTP_INP_WUNLOCK(inp);
2656 #ifdef SCTP_LOG_CLOSING
2657         sctp_log_closing(inp, NULL, 12);
2658 #endif
2659         return (error);
2660 }
2661
2662
2663 void
2664 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2665     struct sctp_tcb *stcb)
2666 {
2667         struct sctp_nets *net;
2668         uint16_t lport, rport;
2669         struct sctppcbhead *head;
2670         struct sctp_laddr *laddr, *oladdr;
2671
2672         atomic_add_int(&stcb->asoc.refcnt, 1);
2673         SCTP_TCB_UNLOCK(stcb);
2674         SCTP_INP_INFO_WLOCK();
2675         SCTP_INP_WLOCK(old_inp);
2676         SCTP_INP_WLOCK(new_inp);
2677         SCTP_TCB_LOCK(stcb);
2678         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2679
2680         new_inp->sctp_ep.time_of_secret_change =
2681             old_inp->sctp_ep.time_of_secret_change;
2682         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2683             sizeof(old_inp->sctp_ep.secret_key));
2684         new_inp->sctp_ep.current_secret_number =
2685             old_inp->sctp_ep.current_secret_number;
2686         new_inp->sctp_ep.last_secret_number =
2687             old_inp->sctp_ep.last_secret_number;
2688         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2689
2690         /* make it so new data pours into the new socket */
2691         stcb->sctp_socket = new_inp->sctp_socket;
2692         stcb->sctp_ep = new_inp;
2693
2694         /* Copy the port across */
2695         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2696         rport = stcb->rport;
2697         /* Pull the tcb from the old association */
2698         LIST_REMOVE(stcb, sctp_tcbhash);
2699         LIST_REMOVE(stcb, sctp_tcblist);
2700         if (stcb->asoc.in_asocid_hash) {
2701                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2702         }
2703         /* Now insert the new_inp into the TCP connected hash */
2704         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2705
2706         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2707         /* Its safe to access */
2708         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2709
2710         /* Now move the tcb into the endpoint list */
2711         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2712         /*
2713          * Question, do we even need to worry about the ep-hash since we
2714          * only have one connection? Probably not :> so lets get rid of it
2715          * and not suck up any kernel memory in that.
2716          */
2717         if (stcb->asoc.in_asocid_hash) {
2718                 struct sctpasochead *lhd;
2719
2720                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2721                     new_inp->hashasocidmark)];
2722                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2723         }
2724         /* Ok. Let's restart timer. */
2725         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2726                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2727                     stcb, net);
2728         }
2729
2730         SCTP_INP_INFO_WUNLOCK();
2731         if (new_inp->sctp_tcbhash != NULL) {
2732                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2733                 new_inp->sctp_tcbhash = NULL;
2734         }
2735         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2736                 /* Subset bound, so copy in the laddr list from the old_inp */
2737                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2738                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2739                         if (laddr == NULL) {
2740                                 /*
2741                                  * Gak, what can we do? This assoc is really
2742                                  * HOSED. We probably should send an abort
2743                                  * here.
2744                                  */
2745                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2746                                 continue;
2747                         }
2748                         SCTP_INCR_LADDR_COUNT();
2749                         bzero(laddr, sizeof(*laddr));
2750                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2751                         laddr->ifa = oladdr->ifa;
2752                         atomic_add_int(&laddr->ifa->refcount, 1);
2753                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2754                             sctp_nxt_addr);
2755                         new_inp->laddr_count++;
2756                         if (oladdr == stcb->asoc.last_used_address) {
2757                                 stcb->asoc.last_used_address = laddr;
2758                         }
2759                 }
2760         }
2761         /*
2762          * Now any running timers need to be adjusted since we really don't
2763          * care if they are running or not just blast in the new_inp into
2764          * all of them.
2765          */
2766
2767         stcb->asoc.dack_timer.ep = (void *)new_inp;
2768         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2769         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2770         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2771         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2772         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2773         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2774         /* now what about the nets? */
2775         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2776                 net->pmtu_timer.ep = (void *)new_inp;
2777                 net->hb_timer.ep = (void *)new_inp;
2778                 net->rxt_timer.ep = (void *)new_inp;
2779         }
2780         SCTP_INP_WUNLOCK(new_inp);
2781         SCTP_INP_WUNLOCK(old_inp);
2782 }
2783
2784
2785
2786
2787 /* sctp_ifap is used to bypass normal local address validation checks */
2788 int
2789 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2790     struct sctp_ifa *sctp_ifap, struct thread *p)
2791 {
2792         /* bind a ep to a socket address */
2793         struct sctppcbhead *head;
2794         struct sctp_inpcb *inp, *inp_tmp;
2795         struct inpcb *ip_inp;
2796         int port_reuse_active = 0;
2797         int bindall;
2798         uint16_t lport;
2799         int error;
2800         uint32_t vrf_id;
2801
2802         lport = 0;
2803         bindall = 1;
2804         inp = (struct sctp_inpcb *)so->so_pcb;
2805         ip_inp = (struct inpcb *)so->so_pcb;
2806 #ifdef SCTP_DEBUG
2807         if (addr) {
2808                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2809                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2810                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2811                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2812         }
2813 #endif
2814         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2815                 /* already did a bind, subsequent binds NOT allowed ! */
2816                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2817                 return (EINVAL);
2818         }
2819 #ifdef INVARIANTS
2820         if (p == NULL)
2821                 panic("null proc/thread");
2822 #endif
2823         if (addr != NULL) {
2824                 switch (addr->sa_family) {
2825 #ifdef INET
2826                 case AF_INET:
2827                         {
2828                                 struct sockaddr_in *sin;
2829
2830                                 /* IPV6_V6ONLY socket? */
2831                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2832                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2833                                         return (EINVAL);
2834                                 }
2835                                 if (addr->sa_len != sizeof(*sin)) {
2836                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2837                                         return (EINVAL);
2838                                 }
2839                                 sin = (struct sockaddr_in *)addr;
2840                                 lport = sin->sin_port;
2841                                 /*
2842                                  * For LOOPBACK the prison_local_ip4() call
2843                                  * will transmute the ip address to the
2844                                  * proper value.
2845                                  */
2846                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2847                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2848                                         return (error);
2849                                 }
2850                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2851                                         bindall = 0;
2852                                 }
2853                                 break;
2854                         }
2855 #endif
2856 #ifdef INET6
2857                 case AF_INET6:
2858                         {
2859                                 /*
2860                                  * Only for pure IPv6 Address. (No IPv4
2861                                  * Mapped!)
2862                                  */
2863                                 struct sockaddr_in6 *sin6;
2864
2865                                 sin6 = (struct sockaddr_in6 *)addr;
2866
2867                                 if (addr->sa_len != sizeof(*sin6)) {
2868                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2869                                         return (EINVAL);
2870                                 }
2871                                 lport = sin6->sin6_port;
2872                                 /*
2873                                  * For LOOPBACK the prison_local_ip6() call
2874                                  * will transmute the ipv6 address to the
2875                                  * proper value.
2876                                  */
2877                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2878                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2879                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2880                                         return (error);
2881                                 }
2882                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2883                                         bindall = 0;
2884                                         /* KAME hack: embed scopeid */
2885                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2886                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2887                                                 return (EINVAL);
2888                                         }
2889                                 }
2890                                 /* this must be cleared for ifa_ifwithaddr() */
2891                                 sin6->sin6_scope_id = 0;
2892                                 break;
2893                         }
2894 #endif
2895                 default:
2896                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2897                         return (EAFNOSUPPORT);
2898                 }
2899         }
2900         SCTP_INP_INFO_WLOCK();
2901         SCTP_INP_WLOCK(inp);
2902         /* Setup a vrf_id to be the default for the non-bind-all case. */
2903         vrf_id = inp->def_vrf_id;
2904
2905         /* increase our count due to the unlock we do */
2906         SCTP_INP_INCR_REF(inp);
2907         if (lport) {
2908                 /*
2909                  * Did the caller specify a port? if so we must see if an ep
2910                  * already has this one bound.
2911                  */
2912                 /* got to be root to get at low ports */
2913                 if (ntohs(lport) < IPPORT_RESERVED) {
2914                         if (p && (error =
2915                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2916                             )) {
2917                                 SCTP_INP_DECR_REF(inp);
2918                                 SCTP_INP_WUNLOCK(inp);
2919                                 SCTP_INP_INFO_WUNLOCK();
2920                                 return (error);
2921                         }
2922                 }
2923                 SCTP_INP_WUNLOCK(inp);
2924                 if (bindall) {
2925                         vrf_id = inp->def_vrf_id;
2926                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2927                         if (inp_tmp != NULL) {
2928                                 /*
2929                                  * lock guy returned and lower count note
2930                                  * that we are not bound so inp_tmp should
2931                                  * NEVER be inp. And it is this inp
2932                                  * (inp_tmp) that gets the reference bump,
2933                                  * so we must lower it.
2934                                  */
2935                                 SCTP_INP_DECR_REF(inp_tmp);
2936                                 /* unlock info */
2937                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2938                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2939                                         /*
2940                                          * Ok, must be one-2-one and
2941                                          * allowing port re-use
2942                                          */
2943                                         port_reuse_active = 1;
2944                                         goto continue_anyway;
2945                                 }
2946                                 SCTP_INP_DECR_REF(inp);
2947                                 SCTP_INP_INFO_WUNLOCK();
2948                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2949                                 return (EADDRINUSE);
2950                         }
2951                 } else {
2952                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2953                         if (inp_tmp != NULL) {
2954                                 /*
2955                                  * lock guy returned and lower count note
2956                                  * that we are not bound so inp_tmp should
2957                                  * NEVER be inp. And it is this inp
2958                                  * (inp_tmp) that gets the reference bump,
2959                                  * so we must lower it.
2960                                  */
2961                                 SCTP_INP_DECR_REF(inp_tmp);
2962                                 /* unlock info */
2963                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2964                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2965                                         /*
2966                                          * Ok, must be one-2-one and
2967                                          * allowing port re-use
2968                                          */
2969                                         port_reuse_active = 1;
2970                                         goto continue_anyway;
2971                                 }
2972                                 SCTP_INP_DECR_REF(inp);
2973                                 SCTP_INP_INFO_WUNLOCK();
2974                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2975                                 return (EADDRINUSE);
2976                         }
2977                 }
2978 continue_anyway:
2979                 SCTP_INP_WLOCK(inp);
2980                 if (bindall) {
2981                         /* verify that no lport is not used by a singleton */
2982                         if ((port_reuse_active == 0) &&
2983                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
2984                                 /* Sorry someone already has this one bound */
2985                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2986                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2987                                         port_reuse_active = 1;
2988                                 } else {
2989                                         SCTP_INP_DECR_REF(inp);
2990                                         SCTP_INP_WUNLOCK(inp);
2991                                         SCTP_INP_INFO_WUNLOCK();
2992                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2993                                         return (EADDRINUSE);
2994                                 }
2995                         }
2996                 }
2997         } else {
2998                 uint16_t first, last, candidate;
2999                 uint16_t count;
3000                 int done;
3001
3002                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3003                         first = MODULE_GLOBAL(ipport_hifirstauto);
3004                         last = MODULE_GLOBAL(ipport_hilastauto);
3005                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3006                         if (p && (error =
3007                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3008                             )) {
3009                                 SCTP_INP_DECR_REF(inp);
3010                                 SCTP_INP_WUNLOCK(inp);
3011                                 SCTP_INP_INFO_WUNLOCK();
3012                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3013                                 return (error);
3014                         }
3015                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3016                         last = MODULE_GLOBAL(ipport_lowlastauto);
3017                 } else {
3018                         first = MODULE_GLOBAL(ipport_firstauto);
3019                         last = MODULE_GLOBAL(ipport_lastauto);
3020                 }
3021                 if (first > last) {
3022                         uint16_t temp;
3023
3024                         temp = first;
3025                         first = last;
3026                         last = temp;
3027                 }
3028                 count = last - first + 1;       /* number of candidates */
3029                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3030
3031                 done = 0;
3032                 while (!done) {
3033                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3034                                 done = 1;
3035                         }
3036                         if (!done) {
3037                                 if (--count == 0) {
3038                                         SCTP_INP_DECR_REF(inp);
3039                                         SCTP_INP_WUNLOCK(inp);
3040                                         SCTP_INP_INFO_WUNLOCK();
3041                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3042                                         return (EADDRINUSE);
3043                                 }
3044                                 if (candidate == last)
3045                                         candidate = first;
3046                                 else
3047                                         candidate = candidate + 1;
3048                         }
3049                 }
3050                 lport = htons(candidate);
3051         }
3052         SCTP_INP_DECR_REF(inp);
3053         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3054             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3055                 /*
3056                  * this really should not happen. The guy did a non-blocking
3057                  * bind and then did a close at the same time.
3058                  */
3059                 SCTP_INP_WUNLOCK(inp);
3060                 SCTP_INP_INFO_WUNLOCK();
3061                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3062                 return (EINVAL);
3063         }
3064         /* ok we look clear to give out this port, so lets setup the binding */
3065         if (bindall) {
3066                 /* binding to all addresses, so just set in the proper flags */
3067                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3068                 /* set the automatic addr changes from kernel flag */
3069                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3070                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3071                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3072                 } else {
3073                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3074                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3075                 }
3076                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3077                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3078                 } else {
3079                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3080                 }
3081                 /*
3082                  * set the automatic mobility_base from kernel flag (by
3083                  * micchie)
3084                  */
3085                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3086                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3087                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3088                 } else {
3089                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3090                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3091                 }
3092                 /*
3093                  * set the automatic mobility_fasthandoff from kernel flag
3094                  * (by micchie)
3095                  */
3096                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3097                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3098                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3099                 } else {
3100                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3101                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3102                 }
3103         } else {
3104                 /*
3105                  * bind specific, make sure flags is off and add a new
3106                  * address structure to the sctp_addr_list inside the ep
3107                  * structure.
3108                  *
3109                  * We will need to allocate one and insert it at the head. The
3110                  * socketopt call can just insert new addresses in there as
3111                  * well. It will also have to do the embed scope kame hack
3112                  * too (before adding).
3113                  */
3114                 struct sctp_ifa *ifa;
3115                 union sctp_sockstore store;
3116
3117                 memset(&store, 0, sizeof(store));
3118                 switch (addr->sa_family) {
3119 #ifdef INET
3120                 case AF_INET:
3121                         memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3122                         store.sin.sin_port = 0;
3123                         break;
3124 #endif
3125 #ifdef INET6
3126                 case AF_INET6:
3127                         memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3128                         store.sin6.sin6_port = 0;
3129                         break;
3130 #endif
3131                 default:
3132                         break;
3133                 }
3134                 /*
3135                  * first find the interface with the bound address need to
3136                  * zero out the port to find the address! yuck! can't do
3137                  * this earlier since need port for sctp_pcb_findep()
3138                  */
3139                 if (sctp_ifap != NULL) {
3140                         ifa = sctp_ifap;
3141                 } else {
3142                         /*
3143                          * Note for BSD we hit here always other O/S's will
3144                          * pass things in via the sctp_ifap argument
3145                          * (Panda).
3146                          */
3147                         ifa = sctp_find_ifa_by_addr(&store.sa,
3148                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3149                 }
3150                 if (ifa == NULL) {
3151                         /* Can't find an interface with that address */
3152                         SCTP_INP_WUNLOCK(inp);
3153                         SCTP_INP_INFO_WUNLOCK();
3154                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3155                         return (EADDRNOTAVAIL);
3156                 }
3157 #ifdef INET6
3158                 if (addr->sa_family == AF_INET6) {
3159                         /* GAK, more FIXME IFA lock? */
3160                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3161                                 /* Can't bind a non-existent addr. */
3162                                 SCTP_INP_WUNLOCK(inp);
3163                                 SCTP_INP_INFO_WUNLOCK();
3164                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3165                                 return (EINVAL);
3166                         }
3167                 }
3168 #endif
3169                 /* we're not bound all */
3170                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3171                 /* allow bindx() to send ASCONF's for binding changes */
3172                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3173                 /* clear automatic addr changes from kernel flag */
3174                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3175
3176                 /* add this address to the endpoint list */
3177                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3178                 if (error != 0) {
3179                         SCTP_INP_WUNLOCK(inp);
3180                         SCTP_INP_INFO_WUNLOCK();
3181                         return (error);
3182                 }
3183                 inp->laddr_count++;
3184         }
3185         /* find the bucket */
3186         if (port_reuse_active) {
3187                 /* Put it into tcp 1-2-1 hash */
3188                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3189                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3190         } else {
3191                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3192         }
3193         /* put it in the bucket */
3194         LIST_INSERT_HEAD(head, inp, sctp_hash);
3195         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3196             (void *)head, ntohs(lport), port_reuse_active);
3197         /* set in the port */
3198         inp->sctp_lport = lport;
3199
3200         /* turn off just the unbound flag */
3201         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3202         SCTP_INP_WUNLOCK(inp);
3203         SCTP_INP_INFO_WUNLOCK();
3204         return (0);
3205 }
3206
3207
3208 static void
3209 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3210 {
3211         struct sctp_iterator *it, *nit;
3212
3213         /*
3214          * We enter with the only the ITERATOR_LOCK in place and a write
3215          * lock on the inp_info stuff.
3216          */
3217         it = sctp_it_ctl.cur_it;
3218         if (it && (it->vn != curvnet)) {
3219                 /* Its not looking at our VNET */
3220                 return;
3221         }
3222         if (it && (it->inp == inp)) {
3223                 /*
3224                  * This is tricky and we hold the iterator lock, but when it
3225                  * returns and gets the lock (when we release it) the
3226                  * iterator will try to operate on inp. We need to stop that
3227                  * from happening. But of course the iterator has a
3228                  * reference on the stcb and inp. We can mark it and it will
3229                  * stop.
3230                  *
3231                  * If its a single iterator situation, we set the end iterator
3232                  * flag. Otherwise we set the iterator to go to the next
3233                  * inp.
3234                  *
3235                  */
3236                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3237                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3238                 } else {
3239                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3240                 }
3241         }
3242         /*
3243          * Now go through and remove any single reference to our inp that
3244          * may be still pending on the list
3245          */
3246         SCTP_IPI_ITERATOR_WQ_LOCK();
3247         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3248                 if (it->vn != curvnet) {
3249                         continue;
3250                 }
3251                 if (it->inp == inp) {
3252                         /* This one points to me is it inp specific? */
3253                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3254                                 /* Remove and free this one */
3255                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3256                                     it, sctp_nxt_itr);
3257                                 if (it->function_atend != NULL) {
3258                                         (*it->function_atend) (it->pointer, it->val);
3259                                 }
3260                                 SCTP_FREE(it, SCTP_M_ITER);
3261                         } else {
3262                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3263                                 if (it->inp) {
3264                                         SCTP_INP_INCR_REF(it->inp);
3265                                 }
3266                         }
3267                         /*
3268                          * When its put in the refcnt is incremented so decr
3269                          * it
3270                          */
3271                         SCTP_INP_DECR_REF(inp);
3272                 }
3273         }
3274         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3275 }
3276
3277 /* release sctp_inpcb unbind the port */
3278 void
3279 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3280 {
3281         /*
3282          * Here we free a endpoint. We must find it (if it is in the Hash
3283          * table) and remove it from there. Then we must also find it in the
3284          * overall list and remove it from there. After all removals are
3285          * complete then any timer has to be stopped. Then start the actual
3286          * freeing. a) Any local lists. b) Any associations. c) The hash of
3287          * all associations. d) finally the ep itself.
3288          */
3289         struct sctp_tcb *asoc, *nasoc;
3290         struct sctp_laddr *laddr, *nladdr;
3291         struct inpcb *ip_pcb;
3292         struct socket *so;
3293         int being_refed = 0;
3294         struct sctp_queued_to_read *sq, *nsq;
3295         int cnt;
3296         sctp_sharedkey_t *shared_key, *nshared_key;
3297
3298
3299 #ifdef SCTP_LOG_CLOSING
3300         sctp_log_closing(inp, NULL, 0);
3301 #endif
3302         SCTP_ITERATOR_LOCK();
3303         /* mark any iterators on the list or being processed */
3304         sctp_iterator_inp_being_freed(inp);
3305         SCTP_ITERATOR_UNLOCK();
3306         so = inp->sctp_socket;
3307         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3308                 /* been here before.. eeks.. get out of here */
3309                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3310 #ifdef SCTP_LOG_CLOSING
3311                 sctp_log_closing(inp, NULL, 1);
3312 #endif
3313                 return;
3314         }
3315         SCTP_ASOC_CREATE_LOCK(inp);
3316         SCTP_INP_INFO_WLOCK();
3317
3318         SCTP_INP_WLOCK(inp);
3319         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3320                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3321                 /* socket is gone, so no more wakeups allowed */
3322                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3323                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3324                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3325
3326         }
3327         /* First time through we have the socket lock, after that no more. */
3328         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3329             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3330
3331         if (inp->control) {
3332                 sctp_m_freem(inp->control);
3333                 inp->control = NULL;
3334         }
3335         if (inp->pkt) {
3336                 sctp_m_freem(inp->pkt);
3337                 inp->pkt = NULL;
3338         }
3339         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3340                                          * here but I will be nice :> (i.e.
3341                                          * ip_pcb = ep;) */
3342         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3343                 int cnt_in_sd;
3344
3345                 cnt_in_sd = 0;
3346                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3347                         SCTP_TCB_LOCK(asoc);
3348                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3349                                 /* Skip guys being freed */
3350                                 cnt_in_sd++;
3351                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3352                                         /*
3353                                          * Special case - we did not start a
3354                                          * kill timer on the asoc due to it
3355                                          * was not closed. So go ahead and
3356                                          * start it now.
3357                                          */
3358                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3359                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3360                                 }
3361                                 SCTP_TCB_UNLOCK(asoc);
3362                                 continue;
3363                         }
3364                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3365                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3366                             (asoc->asoc.total_output_queue_size == 0)) {
3367                                 /*
3368                                  * If we have data in queue, we don't want
3369                                  * to just free since the app may have done,
3370                                  * send()/close or connect/send/close. And
3371                                  * it wants the data to get across first.
3372                                  */
3373                                 /* Just abandon things in the front states */
3374                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3375                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3376                                         cnt_in_sd++;
3377                                 }
3378                                 continue;
3379                         }
3380                         /* Disconnect the socket please */
3381                         asoc->sctp_socket = NULL;
3382                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3383                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3384                             (asoc->asoc.control_pdapi) ||
3385                             (asoc->asoc.size_on_all_streams > 0) ||
3386                             (so && (so->so_rcv.sb_cc > 0))) {
3387                                 /* Left with Data unread */
3388                                 struct mbuf *op_err;
3389
3390                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3391                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3392                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3393                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3394                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3395                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3396                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3397                                 }
3398                                 if (sctp_free_assoc(inp, asoc,
3399                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3400                                         cnt_in_sd++;
3401                                 }
3402                                 continue;
3403                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3404                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3405                             (asoc->asoc.stream_queue_cnt == 0)) {
3406                                 if (asoc->asoc.locked_on_sending) {
3407                                         goto abort_anyway;
3408                                 }
3409                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3410                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3411                                         struct sctp_nets *netp;
3412
3413                                         /*
3414                                          * there is nothing queued to send,
3415                                          * so I send shutdown
3416                                          */
3417                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3418                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3419                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3420                                         }
3421                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3422                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3423                                         sctp_stop_timers_for_shutdown(asoc);
3424                                         if (asoc->asoc.alternate) {
3425                                                 netp = asoc->asoc.alternate;
3426                                         } else {
3427                                                 netp = asoc->asoc.primary_destination;
3428                                         }
3429                                         sctp_send_shutdown(asoc, netp);
3430                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3431                                             netp);
3432                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3433                                             asoc->asoc.primary_destination);
3434                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3435                                 }
3436                         } else {
3437                                 /* mark into shutdown pending */
3438                                 struct sctp_stream_queue_pending *sp;
3439
3440                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3441                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3442                                     asoc->asoc.primary_destination);
3443                                 if (asoc->asoc.locked_on_sending) {
3444                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3445                                             sctp_streamhead);
3446                                         if (sp == NULL) {
3447                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3448                                                     (void *)asoc->asoc.locked_on_sending,
3449                                                     asoc->asoc.locked_on_sending->stream_no);
3450                                         } else {
3451                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3452                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3453                                         }
3454                                 }
3455                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3456                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3457                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3458                                         struct mbuf *op_err;
3459
3460                         abort_anyway:
3461                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3462                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3463                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3464                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3465                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3466                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3467                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3468                                         }
3469                                         if (sctp_free_assoc(inp, asoc,
3470                                             SCTP_PCBFREE_NOFORCE,
3471                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3472                                                 cnt_in_sd++;
3473                                         }
3474                                         continue;
3475                                 } else {
3476                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3477                                 }
3478                         }
3479                         cnt_in_sd++;
3480                         SCTP_TCB_UNLOCK(asoc);
3481                 }
3482                 /* now is there some left in our SHUTDOWN state? */
3483                 if (cnt_in_sd) {
3484 #ifdef SCTP_LOG_CLOSING
3485                         sctp_log_closing(inp, NULL, 2);
3486 #endif
3487                         inp->sctp_socket = NULL;
3488                         SCTP_INP_WUNLOCK(inp);
3489                         SCTP_ASOC_CREATE_UNLOCK(inp);
3490                         SCTP_INP_INFO_WUNLOCK();
3491                         return;
3492                 }
3493         }
3494         inp->sctp_socket = NULL;
3495         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3496             SCTP_PCB_FLAGS_UNBOUND) {
3497                 /*
3498                  * ok, this guy has been bound. It's port is somewhere in
3499                  * the SCTP_BASE_INFO(hash table). Remove it!
3500                  */
3501                 LIST_REMOVE(inp, sctp_hash);
3502                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3503         }
3504         /*
3505          * If there is a timer running to kill us, forget it, since it may
3506          * have a contest on the INP lock.. which would cause us to die ...
3507          */
3508         cnt = 0;
3509         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3510                 SCTP_TCB_LOCK(asoc);
3511                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3512                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3513                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3514                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3515                         }
3516                         cnt++;
3517                         SCTP_TCB_UNLOCK(asoc);
3518                         continue;
3519                 }
3520                 /* Free associations that are NOT killing us */
3521                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3522                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3523                         struct mbuf *op_err;
3524
3525                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3526                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3527                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3528                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3529                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3530                         cnt++;
3531                         SCTP_TCB_UNLOCK(asoc);
3532                         continue;
3533                 }
3534                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3535                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3536                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3537                 }
3538                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3539                     SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3540                         cnt++;
3541                 }
3542         }
3543         if (cnt) {
3544                 /* Ok we have someone out there that will kill us */
3545                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3546 #ifdef SCTP_LOG_CLOSING
3547                 sctp_log_closing(inp, NULL, 3);
3548 #endif
3549                 SCTP_INP_WUNLOCK(inp);
3550                 SCTP_ASOC_CREATE_UNLOCK(inp);
3551                 SCTP_INP_INFO_WUNLOCK();
3552                 return;
3553         }
3554         if (SCTP_INP_LOCK_CONTENDED(inp))
3555                 being_refed++;
3556         if (SCTP_INP_READ_CONTENDED(inp))
3557                 being_refed++;
3558         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3559                 being_refed++;
3560
3561         if ((inp->refcount) ||
3562             (being_refed) ||
3563             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3564                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3565 #ifdef SCTP_LOG_CLOSING
3566                 sctp_log_closing(inp, NULL, 4);
3567 #endif
3568                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3569                 SCTP_INP_WUNLOCK(inp);
3570                 SCTP_ASOC_CREATE_UNLOCK(inp);
3571                 SCTP_INP_INFO_WUNLOCK();
3572                 return;
3573         }
3574         inp->sctp_ep.signature_change.type = 0;
3575         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3576         /*
3577          * Remove it from the list .. last thing we need a lock for.
3578          */
3579         LIST_REMOVE(inp, sctp_list);
3580         SCTP_INP_WUNLOCK(inp);
3581         SCTP_ASOC_CREATE_UNLOCK(inp);
3582         SCTP_INP_INFO_WUNLOCK();
3583         /*
3584          * Now we release all locks. Since this INP cannot be found anymore
3585          * except possibly by the kill timer that might be running. We call
3586          * the drain function here. It should hit the case were it sees the
3587          * ACTIVE flag cleared and exit out freeing us to proceed and
3588          * destroy everything.
3589          */
3590         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3591                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3592         } else {
3593                 /* Probably un-needed */
3594                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3595         }
3596
3597 #ifdef SCTP_LOG_CLOSING
3598         sctp_log_closing(inp, NULL, 5);
3599 #endif
3600
3601
3602         if ((inp->sctp_asocidhash) != NULL) {
3603                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3604                 inp->sctp_asocidhash = NULL;
3605         }
3606         /* sa_ignore FREED_MEMORY */
3607         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3608                 /* Its only abandoned if it had data left */
3609                 if (sq->length)
3610                         SCTP_STAT_INCR(sctps_left_abandon);
3611
3612                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3613                 sctp_free_remote_addr(sq->whoFrom);
3614                 if (so)
3615                         so->so_rcv.sb_cc -= sq->length;
3616                 if (sq->data) {
3617                         sctp_m_freem(sq->data);
3618                         sq->data = NULL;
3619                 }
3620                 /*
3621                  * no need to free the net count, since at this point all
3622                  * assoc's are gone.
3623                  */
3624                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3625                 SCTP_DECR_READQ_COUNT();
3626         }
3627         /* Now the sctp_pcb things */
3628         /*
3629          * free each asoc if it is not already closed/free. we can't use the
3630          * macro here since le_next will get freed as part of the
3631          * sctp_free_assoc() call.
3632          */
3633 #ifdef IPSEC
3634         ipsec_delete_pcbpolicy(ip_pcb);
3635 #endif
3636         if (ip_pcb->inp_options) {
3637                 (void)sctp_m_free(ip_pcb->inp_options);
3638                 ip_pcb->inp_options = 0;
3639         }
3640 #ifdef INET6
3641         if (ip_pcb->inp_vflag & INP_IPV6) {
3642                 struct in6pcb *in6p;
3643
3644                 in6p = (struct in6pcb *)inp;
3645                 ip6_freepcbopts(in6p->in6p_outputopts);
3646         }
3647 #endif                          /* INET6 */
3648         ip_pcb->inp_vflag = 0;
3649         /* free up authentication fields */
3650         if (inp->sctp_ep.local_auth_chunks != NULL)
3651                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3652         if (inp->sctp_ep.local_hmacs != NULL)
3653                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3654
3655         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3656                 LIST_REMOVE(shared_key, next);
3657                 sctp_free_sharedkey(shared_key);
3658                 /* sa_ignore FREED_MEMORY */
3659         }
3660
3661         /*
3662          * if we have an address list the following will free the list of
3663          * ifaddr's that are set into this ep. Again macro limitations here,
3664          * since the LIST_FOREACH could be a bad idea.
3665          */
3666         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3667                 sctp_remove_laddr(laddr);
3668         }
3669
3670 #ifdef SCTP_TRACK_FREED_ASOCS
3671         /* TEMP CODE */
3672         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3673                 LIST_REMOVE(asoc, sctp_tcblist);
3674                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3675                 SCTP_DECR_ASOC_COUNT();
3676         }
3677         /* *** END TEMP CODE *** */
3678 #endif
3679         /* Now lets see about freeing the EP hash table. */
3680         if (inp->sctp_tcbhash != NULL) {
3681                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3682                 inp->sctp_tcbhash = NULL;
3683         }
3684         /* Now we must put the ep memory back into the zone pool */
3685         crfree(inp->ip_inp.inp.inp_cred);
3686         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3687         SCTP_INP_LOCK_DESTROY(inp);
3688         SCTP_INP_READ_DESTROY(inp);
3689         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3690         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3691         SCTP_DECR_EP_COUNT();
3692 }
3693
3694
3695 struct sctp_nets *
3696 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3697 {
3698         struct sctp_nets *net;
3699
3700         /* locate the address */
3701         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3702                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3703                         return (net);
3704         }
3705         return (NULL);
3706 }
3707
3708
3709 int
3710 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3711 {
3712         struct sctp_ifa *sctp_ifa;
3713
3714         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3715         if (sctp_ifa) {
3716                 return (1);
3717         } else {
3718                 return (0);
3719         }
3720 }
3721
3722 /*
3723  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3724  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3725  * stats of stuff.
3726  */
3727 int
3728 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3729     struct sctp_nets **netp, int set_scope, int from)
3730 {
3731         /*
3732          * The following is redundant to the same lines in the
3733          * sctp_aloc_assoc() but is needed since others call the add address
3734          * function
3735          */
3736         struct sctp_nets *net, *netfirst;
3737         int addr_inscope;
3738
3739         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3740             from);
3741         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3742
3743         netfirst = sctp_findnet(stcb, newaddr);
3744         if (netfirst) {
3745                 /*
3746                  * Lie and return ok, we don't want to make the association
3747                  * go away for this behavior. It will happen in the TCP
3748                  * model in a connected socket. It does not reach the hash
3749                  * table until after the association is built so it can't be
3750                  * found. Mark as reachable, since the initial creation will
3751                  * have been cleared and the NOT_IN_ASSOC flag will have
3752                  * been added... and we don't want to end up removing it
3753                  * back out.
3754                  */
3755                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3756                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3757                             SCTP_ADDR_UNCONFIRMED);
3758                 } else {
3759                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3760                 }
3761
3762                 return (0);
3763         }
3764         addr_inscope = 1;
3765         switch (newaddr->sa_family) {
3766 #ifdef INET
3767         case AF_INET:
3768                 {
3769                         struct sockaddr_in *sin;
3770
3771                         sin = (struct sockaddr_in *)newaddr;
3772                         if (sin->sin_addr.s_addr == 0) {
3773                                 /* Invalid address */
3774                                 return (-1);
3775                         }
3776                         /* zero out the bzero area */
3777                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3778
3779                         /* assure len is set */
3780                         sin->sin_len = sizeof(struct sockaddr_in);
3781                         if (set_scope) {
3782                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3783                                         stcb->asoc.scope.ipv4_local_scope = 1;
3784                                 }
3785                         } else {
3786                                 /* Validate the address is in scope */
3787                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3788                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3789                                         addr_inscope = 0;
3790                                 }
3791                         }
3792                         break;
3793                 }
3794 #endif
3795 #ifdef INET6
3796         case AF_INET6:
3797                 {
3798                         struct sockaddr_in6 *sin6;
3799
3800                         sin6 = (struct sockaddr_in6 *)newaddr;
3801                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3802                                 /* Invalid address */
3803                                 return (-1);
3804                         }
3805                         /* assure len is set */
3806                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3807                         if (set_scope) {
3808                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3809                                         stcb->asoc.scope.loopback_scope = 1;
3810                                         stcb->asoc.scope.local_scope = 0;
3811                                         stcb->asoc.scope.ipv4_local_scope = 1;
3812                                         stcb->asoc.scope.site_scope = 1;
3813                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3814                                         /*
3815                                          * If the new destination is a
3816                                          * LINK_LOCAL we must have common
3817                                          * site scope. Don't set the local
3818                                          * scope since we may not share all
3819                                          * links, only loopback can do this.
3820                                          * Links on the local network would
3821                                          * also be on our private network
3822                                          * for v4 too.
3823                                          */
3824                                         stcb->asoc.scope.ipv4_local_scope = 1;
3825                                         stcb->asoc.scope.site_scope = 1;
3826                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3827                                         /*
3828                                          * If the new destination is
3829                                          * SITE_LOCAL then we must have site
3830                                          * scope in common.
3831                                          */
3832                                         stcb->asoc.scope.site_scope = 1;
3833                                 }
3834                         } else {
3835                                 /* Validate the address is in scope */
3836                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3837                                     (stcb->asoc.scope.loopback_scope == 0)) {
3838                                         addr_inscope = 0;
3839                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3840                                     (stcb->asoc.scope.local_scope == 0)) {
3841                                         addr_inscope = 0;
3842                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3843                                     (stcb->asoc.scope.site_scope == 0)) {
3844                                         addr_inscope = 0;
3845                                 }
3846                         }
3847                         break;
3848                 }
3849 #endif
3850         default:
3851                 /* not supported family type */
3852                 return (-1);
3853         }
3854         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3855         if (net == NULL) {
3856                 return (-1);
3857         }
3858         SCTP_INCR_RADDR_COUNT();
3859         bzero(net, sizeof(struct sctp_nets));
3860         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3861         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3862         switch (newaddr->sa_family) {
3863 #ifdef INET
3864         case AF_INET:
3865                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3866                 break;
3867 #endif
3868 #ifdef INET6
3869         case AF_INET6:
3870                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3871                 break;
3872 #endif
3873         default:
3874                 break;
3875         }
3876         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3877         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3878                 stcb->asoc.scope.loopback_scope = 1;
3879                 stcb->asoc.scope.ipv4_local_scope = 1;
3880                 stcb->asoc.scope.local_scope = 0;
3881                 stcb->asoc.scope.site_scope = 1;
3882                 addr_inscope = 1;
3883         }
3884         net->failure_threshold = stcb->asoc.def_net_failure;
3885         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3886         if (addr_inscope == 0) {
3887                 net->dest_state = (SCTP_ADDR_REACHABLE |
3888                     SCTP_ADDR_OUT_OF_SCOPE);
3889         } else {
3890                 if (from == SCTP_ADDR_IS_CONFIRMED)
3891                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3892                         net->dest_state = SCTP_ADDR_REACHABLE;
3893                 else
3894                         net->dest_state = SCTP_ADDR_REACHABLE |
3895                             SCTP_ADDR_UNCONFIRMED;
3896         }
3897         /*
3898          * We set this to 0, the timer code knows that this means its an
3899          * initial value
3900          */
3901         net->rto_needed = 1;
3902         net->RTO = 0;
3903         net->RTO_measured = 0;
3904         stcb->asoc.numnets++;
3905         net->ref_count = 1;
3906         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3907         net->port = stcb->asoc.port;
3908         net->dscp = stcb->asoc.default_dscp;
3909 #ifdef INET6
3910         net->flowlabel = stcb->asoc.default_flowlabel;
3911 #endif
3912         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3913                 net->dest_state |= SCTP_ADDR_NOHB;
3914         } else {
3915                 net->dest_state &= ~SCTP_ADDR_NOHB;
3916         }
3917         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3918                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3919         } else {
3920                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3921         }
3922         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3923         /* Init the timer structure */
3924         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3925         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3926         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3927
3928         /* Now generate a route for this guy */
3929 #ifdef INET6
3930         /* KAME hack: embed scopeid */
3931         if (newaddr->sa_family == AF_INET6) {
3932                 struct sockaddr_in6 *sin6;
3933
3934                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3935                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3936                 sin6->sin6_scope_id = 0;
3937         }
3938 #endif
3939         SCTP_RTALLOC((sctp_route_t *) & net->ro,
3940             stcb->asoc.vrf_id,
3941             stcb->sctp_ep->fibnum);
3942
3943         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3944                 /* Get source address */
3945                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3946                     stcb,
3947                     (sctp_route_t *) & net->ro,
3948                     net,
3949                     0,
3950                     stcb->asoc.vrf_id);
3951                 if (net->ro._s_addr != NULL) {
3952                         net->src_addr_selected = 1;
3953                         /* Now get the interface MTU */
3954                         if (net->ro._s_addr->ifn_p != NULL) {
3955                                 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3956                         }
3957                 } else {
3958                         net->src_addr_selected = 0;
3959                 }
3960                 if (net->mtu > 0) {
3961                         uint32_t rmtu;
3962
3963                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3964                         if (rmtu == 0) {
3965                                 /*
3966                                  * Start things off to match mtu of
3967                                  * interface please.
3968                                  */
3969                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3970                                     net->ro.ro_rt, net->mtu);
3971                         } else {
3972                                 /*
3973                                  * we take the route mtu over the interface,
3974                                  * since the route may be leading out the
3975                                  * loopback, or a different interface.
3976                                  */
3977                                 net->mtu = rmtu;
3978                         }
3979                 }
3980         } else {
3981                 net->src_addr_selected = 0;
3982         }
3983         if (net->mtu == 0) {
3984                 switch (newaddr->sa_family) {
3985 #ifdef INET
3986                 case AF_INET:
3987                         net->mtu = SCTP_DEFAULT_MTU;
3988                         break;
3989 #endif
3990 #ifdef INET6
3991                 case AF_INET6:
3992                         net->mtu = 1280;
3993                         break;
3994 #endif
3995                 default:
3996                         break;
3997                 }
3998         }
3999 #if defined(INET) || defined(INET6)
4000         if (net->port) {
4001                 net->mtu -= (uint32_t) sizeof(struct udphdr);
4002         }
4003 #endif
4004         if (from == SCTP_ALLOC_ASOC) {
4005                 stcb->asoc.smallest_mtu = net->mtu;
4006         }
4007         if (stcb->asoc.smallest_mtu > net->mtu) {
4008                 stcb->asoc.smallest_mtu = net->mtu;
4009         }
4010 #ifdef INET6
4011         if (newaddr->sa_family == AF_INET6) {
4012                 struct sockaddr_in6 *sin6;
4013
4014                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4015                 (void)sa6_recoverscope(sin6);
4016         }
4017 #endif
4018
4019         /* JRS - Use the congestion control given in the CC module */
4020         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4021                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4022
4023         /*
4024          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4025          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4026          */
4027         net->find_pseudo_cumack = 1;
4028         net->find_rtx_pseudo_cumack = 1;
4029         /* Choose an initial flowid. */
4030         net->flowid = stcb->asoc.my_vtag ^
4031             ntohs(stcb->rport) ^
4032             ntohs(stcb->sctp_ep->sctp_lport);
4033         net->flowtype = M_HASHTYPE_OPAQUE;
4034         if (netp) {
4035                 *netp = net;
4036         }
4037         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4038         if (net->ro.ro_rt == NULL) {
4039                 /* Since we have no route put it at the back */
4040                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4041         } else if (netfirst == NULL) {
4042                 /* We are the first one in the pool. */
4043                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4044         } else if (netfirst->ro.ro_rt == NULL) {
4045                 /*
4046                  * First one has NO route. Place this one ahead of the first
4047                  * one.
4048                  */
4049                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4050         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4051                 /*
4052                  * This one has a different interface than the one at the
4053                  * top of the list. Place it ahead.
4054                  */
4055                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4056         } else {
4057                 /*
4058                  * Ok we have the same interface as the first one. Move
4059                  * forward until we find either a) one with a NULL route...
4060                  * insert ahead of that b) one with a different ifp.. insert
4061                  * after that. c) end of the list.. insert at the tail.
4062                  */
4063                 struct sctp_nets *netlook;
4064
4065                 do {
4066                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4067                         if (netlook == NULL) {
4068                                 /* End of the list */
4069                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4070                                 break;
4071                         } else if (netlook->ro.ro_rt == NULL) {
4072                                 /* next one has NO route */
4073                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4074                                 break;
4075                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4076                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4077                                     net, sctp_next);
4078                                 break;
4079                         }
4080                         /* Shift forward */
4081                         netfirst = netlook;
4082                 } while (netlook != NULL);
4083         }
4084
4085         /* got to have a primary set */
4086         if (stcb->asoc.primary_destination == 0) {
4087                 stcb->asoc.primary_destination = net;
4088         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4089                     (net->ro.ro_rt) &&
4090             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4091                 /* No route to current primary adopt new primary */
4092                 stcb->asoc.primary_destination = net;
4093         }
4094         /* Validate primary is first */
4095         net = TAILQ_FIRST(&stcb->asoc.nets);
4096         if ((net != stcb->asoc.primary_destination) &&
4097             (stcb->asoc.primary_destination)) {
4098                 /*
4099                  * first one on the list is NOT the primary sctp_cmpaddr()
4100                  * is much more efficient if the primary is the first on the
4101                  * list, make it so.
4102                  */
4103                 TAILQ_REMOVE(&stcb->asoc.nets,
4104                     stcb->asoc.primary_destination, sctp_next);
4105                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4106                     stcb->asoc.primary_destination, sctp_next);
4107         }
4108         return (0);
4109 }
4110
4111
4112 static uint32_t
4113 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4114 {
4115         uint32_t id;
4116         struct sctpasochead *head;
4117         struct sctp_tcb *lstcb;
4118
4119         SCTP_INP_WLOCK(inp);
4120 try_again:
4121         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4122                 /* TSNH */
4123                 SCTP_INP_WUNLOCK(inp);
4124                 return (0);
4125         }
4126         /*
4127          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4128          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4129          */
4130         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4131                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4132         }
4133         id = inp->sctp_associd_counter;
4134         inp->sctp_associd_counter++;
4135         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4136         if (lstcb) {
4137                 goto try_again;
4138         }
4139         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4140         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4141         stcb->asoc.in_asocid_hash = 1;
4142         SCTP_INP_WUNLOCK(inp);
4143         return id;
4144 }
4145
4146 /*
4147  * allocate an association and add it to the endpoint. The caller must be
4148  * careful to add all additional addresses once they are know right away or
4149  * else the assoc will be may experience a blackout scenario.
4150  */
4151 struct sctp_tcb *
4152 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4153     int *error, uint32_t override_tag, uint32_t vrf_id,
4154     uint16_t o_streams,
4155     struct thread *p
4156 )
4157 {
4158         /* note the p argument is only valid in unbound sockets */
4159
4160         struct sctp_tcb *stcb;
4161         struct sctp_association *asoc;
4162         struct sctpasochead *head;
4163         uint16_t rport;
4164         int err;
4165
4166         /*
4167          * Assumption made here: Caller has done a
4168          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4169          * address does not exist already.
4170          */
4171         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4172                 /* Hit max assoc, sorry no more */
4173                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4174                 *error = ENOBUFS;
4175                 return (NULL);
4176         }
4177         if (firstaddr == NULL) {
4178                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4179                 *error = EINVAL;
4180                 return (NULL);
4181         }
4182         SCTP_INP_RLOCK(inp);
4183         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4184             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4185             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4186                 /*
4187                  * If its in the TCP pool, its NOT allowed to create an
4188                  * association. The parent listener needs to call
4189                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4190                  * off, or connected one does this.. its an error.
4191                  */
4192                 SCTP_INP_RUNLOCK(inp);
4193                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4194                 *error = EINVAL;
4195                 return (NULL);
4196         }
4197         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4198             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4199                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4200                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4201                         SCTP_INP_RUNLOCK(inp);
4202                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4203                         *error = EINVAL;
4204                         return (NULL);
4205                 }
4206         }
4207         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4208 #ifdef SCTP_DEBUG
4209         if (firstaddr) {
4210                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4211                 switch (firstaddr->sa_family) {
4212 #ifdef INET
4213                 case AF_INET:
4214                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4215                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4216                         break;
4217 #endif
4218 #ifdef INET6
4219                 case AF_INET6:
4220                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4221                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4222                         break;
4223 #endif
4224                 default:
4225                         break;
4226                 }
4227         } else {
4228                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4229         }
4230 #endif                          /* SCTP_DEBUG */
4231         switch (firstaddr->sa_family) {
4232 #ifdef INET
4233         case AF_INET:
4234                 {
4235                         struct sockaddr_in *sin;
4236
4237                         sin = (struct sockaddr_in *)firstaddr;
4238                         if ((ntohs(sin->sin_port) == 0) ||
4239                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4240                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4241                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4242                                 /* Invalid address */
4243                                 SCTP_INP_RUNLOCK(inp);
4244                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4245                                 *error = EINVAL;
4246                                 return (NULL);
4247                         }
4248                         rport = sin->sin_port;
4249                         break;
4250                 }
4251 #endif
4252 #ifdef INET6
4253         case AF_INET6:
4254                 {
4255                         struct sockaddr_in6 *sin6;
4256
4257                         sin6 = (struct sockaddr_in6 *)firstaddr;
4258                         if ((ntohs(sin6->sin6_port) == 0) ||
4259                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4260                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4261                                 /* Invalid address */
4262                                 SCTP_INP_RUNLOCK(inp);
4263                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4264                                 *error = EINVAL;
4265                                 return (NULL);
4266                         }
4267                         rport = sin6->sin6_port;
4268                         break;
4269                 }
4270 #endif
4271         default:
4272                 /* not supported family type */
4273                 SCTP_INP_RUNLOCK(inp);
4274                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4275                 *error = EINVAL;
4276                 return (NULL);
4277         }
4278         SCTP_INP_RUNLOCK(inp);
4279         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4280                 /*
4281                  * If you have not performed a bind, then we need to do the
4282                  * ephemeral bind for you.
4283                  */
4284                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4285                     (struct sockaddr *)NULL,
4286                     (struct sctp_ifa *)NULL,
4287                     p
4288                     ))) {
4289                         /* bind error, probably perm */
4290                         *error = err;
4291                         return (NULL);
4292                 }
4293         }
4294         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4295         if (stcb == NULL) {
4296                 /* out of memory? */
4297                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4298                 *error = ENOMEM;
4299                 return (NULL);
4300         }
4301         SCTP_INCR_ASOC_COUNT();
4302
4303         bzero(stcb, sizeof(*stcb));
4304         asoc = &stcb->asoc;
4305
4306         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4307         SCTP_TCB_LOCK_INIT(stcb);
4308         SCTP_TCB_SEND_LOCK_INIT(stcb);
4309         stcb->rport = rport;
4310         /* setup back pointer's */
4311         stcb->sctp_ep = inp;
4312         stcb->sctp_socket = inp->sctp_socket;
4313         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
4314                 /* failed */
4315                 SCTP_TCB_LOCK_DESTROY(stcb);
4316                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4317                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4318                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4319                 SCTP_DECR_ASOC_COUNT();
4320                 *error = err;
4321                 return (NULL);
4322         }
4323         /* and the port */
4324         SCTP_INP_INFO_WLOCK();
4325         SCTP_INP_WLOCK(inp);
4326         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4327                 /* inpcb freed while alloc going on */
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_INP_WUNLOCK(inp);
4333                 SCTP_INP_INFO_WUNLOCK();
4334                 SCTP_DECR_ASOC_COUNT();
4335                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4336                 *error = EINVAL;
4337                 return (NULL);
4338         }
4339         SCTP_TCB_LOCK(stcb);
4340
4341         /* now that my_vtag is set, add it to the hash */
4342         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4343         /* put it in the bucket in the vtag hash of assoc's for the system */
4344         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4345         SCTP_INP_INFO_WUNLOCK();
4346
4347         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4348                 /* failure.. memory error? */
4349                 if (asoc->strmout) {
4350                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4351                         asoc->strmout = NULL;
4352                 }
4353                 if (asoc->mapping_array) {
4354                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4355                         asoc->mapping_array = NULL;
4356                 }
4357                 if (asoc->nr_mapping_array) {
4358                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4359                         asoc->nr_mapping_array = NULL;
4360                 }
4361                 SCTP_DECR_ASOC_COUNT();
4362                 SCTP_TCB_UNLOCK(stcb);
4363                 SCTP_TCB_LOCK_DESTROY(stcb);
4364                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4365                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4366                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4367                 SCTP_INP_WUNLOCK(inp);
4368                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4369                 *error = ENOBUFS;
4370                 return (NULL);
4371         }
4372         /* Init all the timers */
4373         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4374         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4375         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4376         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4377         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4378         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4379         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4380
4381         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4382         /* now file the port under the hash as well */
4383         if (inp->sctp_tcbhash != NULL) {
4384                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4385                     inp->sctp_hashmark)];
4386                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4387         }
4388         SCTP_INP_WUNLOCK(inp);
4389         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4390         return (stcb);
4391 }
4392
4393
4394 void
4395 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4396 {
4397         struct sctp_association *asoc;
4398
4399         asoc = &stcb->asoc;
4400         asoc->numnets--;
4401         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4402         if (net == asoc->primary_destination) {
4403                 /* Reset primary */
4404                 struct sctp_nets *lnet;
4405
4406                 lnet = TAILQ_FIRST(&asoc->nets);
4407                 /*
4408                  * Mobility adaptation Ideally, if deleted destination is
4409                  * the primary, it becomes a fast retransmission trigger by
4410                  * the subsequent SET PRIMARY. (by micchie)
4411                  */
4412                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4413                     SCTP_MOBILITY_BASE) ||
4414                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4415                     SCTP_MOBILITY_FASTHANDOFF)) {
4416                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4417                         if (asoc->deleted_primary != NULL) {
4418                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4419                                 goto out;
4420                         }
4421                         asoc->deleted_primary = net;
4422                         atomic_add_int(&net->ref_count, 1);
4423                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4424                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4425                         sctp_mobility_feature_on(stcb->sctp_ep,
4426                             SCTP_MOBILITY_PRIM_DELETED);
4427                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4428                             stcb->sctp_ep, stcb, NULL);
4429                 }
4430 out:
4431                 /* Try to find a confirmed primary */
4432                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4433         }
4434         if (net == asoc->last_data_chunk_from) {
4435                 /* Reset primary */
4436                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4437         }
4438         if (net == asoc->last_control_chunk_from) {
4439                 /* Clear net */
4440                 asoc->last_control_chunk_from = NULL;
4441         }
4442         if (net == stcb->asoc.alternate) {
4443                 sctp_free_remote_addr(stcb->asoc.alternate);
4444                 stcb->asoc.alternate = NULL;
4445         }
4446         sctp_free_remote_addr(net);
4447 }
4448
4449 /*
4450  * remove a remote endpoint address from an association, it will fail if the
4451  * address does not exist.
4452  */
4453 int
4454 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4455 {
4456         /*
4457          * Here we need to remove a remote address. This is quite simple, we
4458          * first find it in the list of address for the association
4459          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4460          * on that item. Note we do not allow it to be removed if there are
4461          * no other addresses.
4462          */
4463         struct sctp_association *asoc;
4464         struct sctp_nets *net, *nnet;
4465
4466         asoc = &stcb->asoc;
4467
4468         /* locate the address */
4469         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4470                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4471                         continue;
4472                 }
4473                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4474                     remaddr)) {
4475                         /* we found the guy */
4476                         if (asoc->numnets < 2) {
4477                                 /* Must have at LEAST two remote addresses */
4478                                 return (-1);
4479                         } else {
4480                                 sctp_remove_net(stcb, net);
4481                                 return (0);
4482                         }
4483                 }
4484         }
4485         /* not found. */
4486         return (-2);
4487 }
4488
4489 void
4490 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4491 {
4492         struct sctpvtaghead *chain;
4493         struct sctp_tagblock *twait_block;
4494         int found = 0;
4495         int i;
4496
4497         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4498         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4499                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4500                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4501                             (twait_block->vtag_block[i].lport == lport) &&
4502                             (twait_block->vtag_block[i].rport == rport)) {
4503                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4504                                 twait_block->vtag_block[i].v_tag = 0;
4505                                 twait_block->vtag_block[i].lport = 0;
4506                                 twait_block->vtag_block[i].rport = 0;
4507                                 found = 1;
4508                                 break;
4509                         }
4510                 }
4511                 if (found)
4512                         break;
4513         }
4514 }
4515
4516 int
4517 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4518 {
4519         struct sctpvtaghead *chain;
4520         struct sctp_tagblock *twait_block;
4521         int found = 0;
4522         int i;
4523
4524         SCTP_INP_INFO_WLOCK();
4525         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4526         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4527                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4528                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4529                             (twait_block->vtag_block[i].lport == lport) &&
4530                             (twait_block->vtag_block[i].rport == rport)) {
4531                                 found = 1;
4532                                 break;
4533                         }
4534                 }
4535                 if (found)
4536                         break;
4537         }
4538         SCTP_INP_INFO_WUNLOCK();
4539         return (found);
4540 }
4541
4542
4543 void
4544 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4545 {
4546         struct sctpvtaghead *chain;
4547         struct sctp_tagblock *twait_block;
4548         struct timeval now;
4549         int set, i;
4550
4551         if (time == 0) {
4552                 /* Its disabled */
4553                 return;
4554         }
4555         (void)SCTP_GETTIME_TIMEVAL(&now);
4556         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4557         set = 0;
4558         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4559                 /* Block(s) present, lets find space, and expire on the fly */
4560                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4561                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4562                             !set) {
4563                                 twait_block->vtag_block[i].tv_sec_at_expire =
4564                                     now.tv_sec + time;
4565                                 twait_block->vtag_block[i].v_tag = tag;
4566                                 twait_block->vtag_block[i].lport = lport;
4567                                 twait_block->vtag_block[i].rport = rport;
4568                                 set = 1;
4569                         } else if ((twait_block->vtag_block[i].v_tag) &&
4570                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4571                                 /* Audit expires this guy */
4572                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4573                                 twait_block->vtag_block[i].v_tag = 0;
4574                                 twait_block->vtag_block[i].lport = 0;
4575                                 twait_block->vtag_block[i].rport = 0;
4576                                 if (set == 0) {
4577                                         /* Reuse it for my new tag */
4578                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4579                                         twait_block->vtag_block[i].v_tag = tag;
4580                                         twait_block->vtag_block[i].lport = lport;
4581                                         twait_block->vtag_block[i].rport = rport;
4582                                         set = 1;
4583                                 }
4584                         }
4585                 }
4586                 if (set) {
4587                         /*
4588                          * We only do up to the block where we can place our
4589                          * tag for audits
4590                          */
4591                         break;
4592                 }
4593         }
4594         /* Need to add a new block to chain */
4595         if (!set) {
4596                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4597                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4598                 if (twait_block == NULL) {
4599 #ifdef INVARIANTS
4600                         panic("Can not alloc tagblock");
4601 #endif
4602                         return;
4603                 }
4604                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4605                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4606                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4607                 twait_block->vtag_block[0].v_tag = tag;
4608                 twait_block->vtag_block[0].lport = lport;
4609                 twait_block->vtag_block[0].rport = rport;
4610         }
4611 }
4612
4613
4614
4615 /*-
4616  * Free the association after un-hashing the remote port. This
4617  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4618  * expect that the input to this function IS a locked TCB.
4619  * It will return 0, if it did NOT destroy the association (instead
4620  * it unlocks it. It will return NON-zero if it either destroyed the
4621  * association OR the association is already destroyed.
4622  */
4623 int
4624 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4625 {
4626         int i;
4627         struct sctp_association *asoc;
4628         struct sctp_nets *net, *nnet;
4629         struct sctp_laddr *laddr, *naddr;
4630         struct sctp_tmit_chunk *chk, *nchk;
4631         struct sctp_asconf_addr *aparam, *naparam;
4632         struct sctp_asconf_ack *aack, *naack;
4633         struct sctp_stream_reset_list *strrst, *nstrrst;
4634         struct sctp_queued_to_read *sq, *nsq;
4635         struct sctp_stream_queue_pending *sp, *nsp;
4636         sctp_sharedkey_t *shared_key, *nshared_key;
4637         struct socket *so;
4638
4639         /* first, lets purge the entry from the hash table. */
4640
4641 #ifdef SCTP_LOG_CLOSING
4642         sctp_log_closing(inp, stcb, 6);
4643 #endif
4644         if (stcb->asoc.state == 0) {
4645 #ifdef SCTP_LOG_CLOSING
4646                 sctp_log_closing(inp, NULL, 7);
4647 #endif
4648                 /* there is no asoc, really TSNH :-0 */
4649                 return (1);
4650         }
4651         if (stcb->asoc.alternate) {
4652                 sctp_free_remote_addr(stcb->asoc.alternate);
4653                 stcb->asoc.alternate = NULL;
4654         }
4655         /* TEMP CODE */
4656         if (stcb->freed_from_where == 0) {
4657                 /* Only record the first place free happened from */
4658                 stcb->freed_from_where = from_location;
4659         }
4660         /* TEMP CODE */
4661
4662         asoc = &stcb->asoc;
4663         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4664             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4665                 /* nothing around */
4666                 so = NULL;
4667         else
4668                 so = inp->sctp_socket;
4669
4670         /*
4671          * We used timer based freeing if a reader or writer is in the way.
4672          * So we first check if we are actually being called from a timer,
4673          * if so we abort early if a reader or writer is still in the way.
4674          */
4675         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4676             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4677                 /*
4678                  * is it the timer driving us? if so are the reader/writers
4679                  * gone?
4680                  */
4681                 if (stcb->asoc.refcnt) {
4682                         /* nope, reader or writer in the way */
4683                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4684                         /* no asoc destroyed */
4685                         SCTP_TCB_UNLOCK(stcb);
4686 #ifdef SCTP_LOG_CLOSING
4687                         sctp_log_closing(inp, stcb, 8);
4688 #endif
4689                         return (0);
4690                 }
4691         }
4692         /* now clean up any other timers */
4693         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4694         asoc->dack_timer.self = NULL;
4695         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4696         /*-
4697          * For stream reset we don't blast this unless
4698          * it is a str-reset timer, it might be the
4699          * free-asoc timer which we DON'T want to
4700          * disturb.
4701          */
4702         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4703                 asoc->strreset_timer.self = NULL;
4704         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4705         asoc->asconf_timer.self = NULL;
4706         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4707         asoc->autoclose_timer.self = NULL;
4708         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4709         asoc->shut_guard_timer.self = NULL;
4710         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4711         asoc->delayed_event_timer.self = NULL;
4712         /* Mobility adaptation */
4713         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4714         asoc->delete_prim_timer.self = NULL;
4715         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4716                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4717                 net->rxt_timer.self = NULL;
4718                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4719                 net->pmtu_timer.self = NULL;
4720                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4721                 net->hb_timer.self = NULL;
4722         }
4723         /* Now the read queue needs to be cleaned up (only once) */
4724         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4725                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4726                 SCTP_INP_READ_LOCK(inp);
4727                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4728                         if (sq->stcb == stcb) {
4729                                 sq->do_not_ref_stcb = 1;
4730                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4731                                 /*
4732                                  * If there is no end, there never will be
4733                                  * now.
4734                                  */
4735                                 if (sq->end_added == 0) {
4736                                         /* Held for PD-API clear that. */
4737                                         sq->pdapi_aborted = 1;
4738                                         sq->held_length = 0;
4739                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4740                                                 /*
4741                                                  * Need to add a PD-API
4742                                                  * aborted indication.
4743                                                  * Setting the control_pdapi
4744                                                  * assures that it will be
4745                                                  * added right after this
4746                                                  * msg.
4747                                                  */
4748                                                 uint32_t strseq;
4749
4750                                                 stcb->asoc.control_pdapi = sq;
4751                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4752                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4753                                                     stcb,
4754                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4755                                                     (void *)&strseq,
4756                                                     SCTP_SO_LOCKED);
4757                                                 stcb->asoc.control_pdapi = NULL;
4758                                         }
4759                                 }
4760                                 /* Add an end to wake them */
4761                                 sq->end_added = 1;
4762                         }
4763                 }
4764                 SCTP_INP_READ_UNLOCK(inp);
4765                 if (stcb->block_entry) {
4766                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4767                         stcb->block_entry->error = ECONNRESET;
4768                         stcb->block_entry = NULL;
4769                 }
4770         }
4771         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4772                 /*
4773                  * Someone holds a reference OR the socket is unaccepted
4774                  * yet.
4775                  */
4776                 if ((stcb->asoc.refcnt) ||
4777                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4778                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4779                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4780                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4781                 }
4782                 SCTP_TCB_UNLOCK(stcb);
4783                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4784                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4785                         /* nothing around */
4786                         so = NULL;
4787                 if (so) {
4788                         /* Wake any reader/writers */
4789                         sctp_sorwakeup(inp, so);
4790                         sctp_sowwakeup(inp, so);
4791                 }
4792 #ifdef SCTP_LOG_CLOSING
4793                 sctp_log_closing(inp, stcb, 9);
4794 #endif
4795                 /* no asoc destroyed */
4796                 return (0);
4797         }
4798 #ifdef SCTP_LOG_CLOSING
4799         sctp_log_closing(inp, stcb, 10);
4800 #endif
4801         /*
4802          * When I reach here, no others want to kill the assoc yet.. and I
4803          * own the lock. Now its possible an abort comes in when I do the
4804          * lock exchange below to grab all the locks to do the final take
4805          * out. to prevent this we increment the count, which will start a
4806          * timer and blow out above thus assuring us that we hold exclusive
4807          * killing of the asoc. Note that after getting back the TCB lock we
4808          * will go ahead and increment the counter back up and stop any
4809          * timer a passing stranger may have started :-S
4810          */
4811         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4812                 atomic_add_int(&stcb->asoc.refcnt, 1);
4813
4814                 SCTP_TCB_UNLOCK(stcb);
4815                 SCTP_INP_INFO_WLOCK();
4816                 SCTP_INP_WLOCK(inp);
4817                 SCTP_TCB_LOCK(stcb);
4818         }
4819         /* Double check the GONE flag */
4820         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4821             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4822                 /* nothing around */
4823                 so = NULL;
4824
4825         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4826             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4827                 /*
4828                  * For TCP type we need special handling when we are
4829                  * connected. We also include the peel'ed off ones to.
4830                  */
4831                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4832                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4833                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4834                         if (so) {
4835                                 SOCK_LOCK(so);
4836                                 if (so->so_rcv.sb_cc == 0) {
4837                                         so->so_state &= ~(SS_ISCONNECTING |
4838                                             SS_ISDISCONNECTING |
4839                                             SS_ISCONFIRMING |
4840                                             SS_ISCONNECTED);
4841                                 }
4842                                 socantrcvmore_locked(so);
4843                                 sctp_sowwakeup(inp, so);
4844                                 sctp_sorwakeup(inp, so);
4845                                 SCTP_SOWAKEUP(so);
4846                         }
4847                 }
4848         }
4849         /*
4850          * Make it invalid too, that way if its about to run it will abort
4851          * and return.
4852          */
4853         /* re-increment the lock */
4854         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4855                 atomic_add_int(&stcb->asoc.refcnt, -1);
4856         }
4857         if (stcb->asoc.refcnt) {
4858                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4859                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4860                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4861                         SCTP_INP_INFO_WUNLOCK();
4862                         SCTP_INP_WUNLOCK(inp);
4863                 }
4864                 SCTP_TCB_UNLOCK(stcb);
4865                 return (0);
4866         }
4867         asoc->state = 0;
4868         if (inp->sctp_tcbhash) {
4869                 LIST_REMOVE(stcb, sctp_tcbhash);
4870         }
4871         if (stcb->asoc.in_asocid_hash) {
4872                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4873         }
4874         /* Now lets remove it from the list of ALL associations in the EP */
4875         LIST_REMOVE(stcb, sctp_tcblist);
4876         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4877                 SCTP_INP_INCR_REF(inp);
4878                 SCTP_INP_WUNLOCK(inp);
4879         }
4880         /* pull from vtag hash */
4881         LIST_REMOVE(stcb, sctp_asocs);
4882         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4883             inp->sctp_lport, stcb->rport);
4884
4885         /*
4886          * Now restop the timers to be sure this is paranoia at is finest!
4887          */
4888         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4889         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4890         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4891         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4892         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4893         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4894         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4895         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4896                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4897                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4898                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4899         }
4900
4901         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4902         /*
4903          * The chunk lists and such SHOULD be empty but we check them just
4904          * in case.
4905          */
4906         /* anything on the wheel needs to be removed */
4907         for (i = 0; i < asoc->streamoutcnt; i++) {
4908                 struct sctp_stream_out *outs;
4909
4910                 outs = &asoc->strmout[i];
4911                 /* now clean up any chunks here */
4912                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4913                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4914                         sctp_free_spbufspace(stcb, asoc, sp);
4915                         if (sp->data) {
4916                                 if (so) {
4917                                         /* Still an open socket - report */
4918                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4919                                             0, (void *)sp, SCTP_SO_LOCKED);
4920                                 }
4921                                 if (sp->data) {
4922                                         sctp_m_freem(sp->data);
4923                                         sp->data = NULL;
4924                                         sp->tail_mbuf = NULL;
4925                                         sp->length = 0;
4926                                 }
4927                         }
4928                         if (sp->net) {
4929                                 sctp_free_remote_addr(sp->net);
4930                                 sp->net = NULL;
4931                         }
4932                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4933                 }
4934         }
4935         /* sa_ignore FREED_MEMORY */
4936         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4937                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4938                 SCTP_FREE(strrst, SCTP_M_STRESET);
4939         }
4940         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4941                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4942                 if (sq->data) {
4943                         sctp_m_freem(sq->data);
4944                         sq->data = NULL;
4945                 }
4946                 sctp_free_remote_addr(sq->whoFrom);
4947                 sq->whoFrom = NULL;
4948                 sq->stcb = NULL;
4949                 /* Free the ctl entry */
4950                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4951                 SCTP_DECR_READQ_COUNT();
4952                 /* sa_ignore FREED_MEMORY */
4953         }
4954         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4955                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4956                 if (chk->data) {
4957                         sctp_m_freem(chk->data);
4958                         chk->data = NULL;
4959                 }
4960                 if (chk->holds_key_ref)
4961                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4962                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4963                 SCTP_DECR_CHK_COUNT();
4964                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4965                 asoc->free_chunk_cnt--;
4966                 /* sa_ignore FREED_MEMORY */
4967         }
4968         /* pending send queue SHOULD be empty */
4969         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4970                 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
4971                         asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
4972 #ifdef INVARIANTS
4973                 } else {
4974                         panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
4975 #endif
4976                 }
4977                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4978                 if (chk->data) {
4979                         if (so) {
4980                                 /* Still a socket? */
4981                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
4982                                     0, chk, SCTP_SO_LOCKED);
4983                         }
4984                         if (chk->data) {
4985                                 sctp_m_freem(chk->data);
4986                                 chk->data = NULL;
4987                         }
4988                 }
4989                 if (chk->holds_key_ref)
4990                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4991                 if (chk->whoTo) {
4992                         sctp_free_remote_addr(chk->whoTo);
4993                         chk->whoTo = NULL;
4994                 }
4995                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4996                 SCTP_DECR_CHK_COUNT();
4997                 /* sa_ignore FREED_MEMORY */
4998         }
4999         /* sent queue SHOULD be empty */
5000         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5001                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5002                         if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
5003                                 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
5004 #ifdef INVARIANTS
5005                         } else {
5006                                 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
5007 #endif
5008                         }
5009                 }
5010                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5011                 if (chk->data) {
5012                         if (so) {
5013                                 /* Still a socket? */
5014                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5015                                     0, chk, SCTP_SO_LOCKED);
5016                         }
5017                         if (chk->data) {
5018                                 sctp_m_freem(chk->data);
5019                                 chk->data = NULL;
5020                         }
5021                 }
5022                 if (chk->holds_key_ref)
5023                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5024                 sctp_free_remote_addr(chk->whoTo);
5025                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5026                 SCTP_DECR_CHK_COUNT();
5027                 /* sa_ignore FREED_MEMORY */
5028         }
5029 #ifdef INVARIANTS
5030         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5031                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5032                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5033                 }
5034         }
5035 #endif
5036         /* control queue MAY not be empty */
5037         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5038                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5039                 if (chk->data) {
5040                         sctp_m_freem(chk->data);
5041                         chk->data = NULL;
5042                 }
5043                 if (chk->holds_key_ref)
5044                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5045                 sctp_free_remote_addr(chk->whoTo);
5046                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5047                 SCTP_DECR_CHK_COUNT();
5048                 /* sa_ignore FREED_MEMORY */
5049         }
5050         /* ASCONF queue MAY not be empty */
5051         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5052                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5053                 if (chk->data) {
5054                         sctp_m_freem(chk->data);
5055                         chk->data = NULL;
5056                 }
5057                 if (chk->holds_key_ref)
5058                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5059                 sctp_free_remote_addr(chk->whoTo);
5060                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5061                 SCTP_DECR_CHK_COUNT();
5062                 /* sa_ignore FREED_MEMORY */
5063         }
5064         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5065                 TAILQ_REMOVE(&asoc->reasmqueue, 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
5078         if (asoc->mapping_array) {
5079                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5080                 asoc->mapping_array = NULL;
5081         }
5082         if (asoc->nr_mapping_array) {
5083                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5084                 asoc->nr_mapping_array = NULL;
5085         }
5086         /* the stream outs */
5087         if (asoc->strmout) {
5088                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5089                 asoc->strmout = NULL;
5090         }
5091         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5092         if (asoc->strmin) {
5093                 struct sctp_queued_to_read *ctl, *nctl;
5094
5095                 for (i = 0; i < asoc->streamincnt; i++) {
5096                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5097                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5098                                 sctp_free_remote_addr(ctl->whoFrom);
5099                                 if (ctl->data) {
5100                                         sctp_m_freem(ctl->data);
5101                                         ctl->data = NULL;
5102                                 }
5103                                 /*
5104                                  * We don't free the address here since all
5105                                  * the net's were freed above.
5106                                  */
5107                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5108                                 SCTP_DECR_READQ_COUNT();
5109                         }
5110                 }
5111                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5112                 asoc->strmin = NULL;
5113         }
5114         asoc->streamincnt = 0;
5115         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5116 #ifdef INVARIANTS
5117                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5118                         panic("no net's left alloc'ed, or list points to itself");
5119                 }
5120 #endif
5121                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5122                 sctp_free_remote_addr(net);
5123         }
5124         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5125                 /* sa_ignore FREED_MEMORY */
5126                 sctp_remove_laddr(laddr);
5127         }
5128
5129         /* pending asconf (address) parameters */
5130         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5131                 /* sa_ignore FREED_MEMORY */
5132                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5133                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5134         }
5135         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5136                 /* sa_ignore FREED_MEMORY */
5137                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5138                 if (aack->data != NULL) {
5139                         sctp_m_freem(aack->data);
5140                 }
5141                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5142         }
5143         /* clean up auth stuff */
5144         if (asoc->local_hmacs)
5145                 sctp_free_hmaclist(asoc->local_hmacs);
5146         if (asoc->peer_hmacs)
5147                 sctp_free_hmaclist(asoc->peer_hmacs);
5148
5149         if (asoc->local_auth_chunks)
5150                 sctp_free_chunklist(asoc->local_auth_chunks);
5151         if (asoc->peer_auth_chunks)
5152                 sctp_free_chunklist(asoc->peer_auth_chunks);
5153
5154         sctp_free_authinfo(&asoc->authinfo);
5155
5156         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5157                 LIST_REMOVE(shared_key, next);
5158                 sctp_free_sharedkey(shared_key);
5159                 /* sa_ignore FREED_MEMORY */
5160         }
5161
5162         /* Insert new items here :> */
5163
5164         /* Get rid of LOCK */
5165         SCTP_TCB_UNLOCK(stcb);
5166         SCTP_TCB_LOCK_DESTROY(stcb);
5167         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5168         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5169                 SCTP_INP_INFO_WUNLOCK();
5170                 SCTP_INP_RLOCK(inp);
5171         }
5172 #ifdef SCTP_TRACK_FREED_ASOCS
5173         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5174                 /* now clean up the tasoc itself */
5175                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5176                 SCTP_DECR_ASOC_COUNT();
5177         } else {
5178                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5179         }
5180 #else
5181         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5182         SCTP_DECR_ASOC_COUNT();
5183 #endif
5184         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5185                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5186                         /*
5187                          * If its NOT the inp_free calling us AND sctp_close
5188                          * as been called, we call back...
5189                          */
5190                         SCTP_INP_RUNLOCK(inp);
5191                         /*
5192                          * This will start the kill timer (if we are the
5193                          * last one) since we hold an increment yet. But
5194                          * this is the only safe way to do this since
5195                          * otherwise if the socket closes at the same time
5196                          * we are here we might collide in the cleanup.
5197                          */
5198                         sctp_inpcb_free(inp,
5199                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5200                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5201                         SCTP_INP_DECR_REF(inp);
5202                         goto out_of;
5203                 } else {
5204                         /* The socket is still open. */
5205                         SCTP_INP_DECR_REF(inp);
5206                 }
5207         }
5208         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5209                 SCTP_INP_RUNLOCK(inp);
5210         }
5211 out_of:
5212         /* destroyed the asoc */
5213 #ifdef SCTP_LOG_CLOSING
5214         sctp_log_closing(inp, NULL, 11);
5215 #endif
5216         return (1);
5217 }
5218
5219
5220
5221 /*
5222  * determine if a destination is "reachable" based upon the addresses bound
5223  * to the current endpoint (e.g. only v4 or v6 currently bound)
5224  */
5225 /*
5226  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5227  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5228  * types bound as its endpoint
5229  */
5230 int
5231 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5232 {
5233         struct sctp_inpcb *inp;
5234         int answer;
5235
5236         /*
5237          * No locks here, the TCB, in all cases is already locked and an
5238          * assoc is up. There is either a INP lock by the caller applied (in
5239          * asconf case when deleting an address) or NOT in the HB case,
5240          * however if HB then the INP increment is up and the INP will not
5241          * be removed (on top of the fact that we have a TCB lock). So we
5242          * only want to read the sctp_flags, which is either bound-all or
5243          * not.. no protection needed since once an assoc is up you can't be
5244          * changing your binding.
5245          */
5246         inp = stcb->sctp_ep;
5247         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5248                 /* if bound all, destination is not restricted */
5249                 /*
5250                  * RRS: Question during lock work: Is this correct? If you
5251                  * are bound-all you still might need to obey the V4--V6
5252                  * flags??? IMO this bound-all stuff needs to be removed!
5253                  */
5254                 return (1);
5255         }
5256         /* NOTE: all "scope" checks are done when local addresses are added */
5257         switch (destaddr->sa_family) {
5258 #ifdef INET6
5259         case AF_INET6:
5260                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5261                 break;
5262 #endif
5263 #ifdef INET
5264         case AF_INET:
5265                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5266                 break;
5267 #endif
5268         default:
5269                 /* invalid family, so it's unreachable */
5270                 answer = 0;
5271                 break;
5272         }
5273         return (answer);
5274 }
5275
5276 /*
5277  * update the inp_vflags on an endpoint
5278  */
5279 static void
5280 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5281 {
5282         struct sctp_laddr *laddr;
5283
5284         /* first clear the flag */
5285         inp->ip_inp.inp.inp_vflag = 0;
5286         /* set the flag based on addresses on the ep list */
5287         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5288                 if (laddr->ifa == NULL) {
5289                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5290                             __func__);
5291                         continue;
5292                 }
5293                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5294                         continue;
5295                 }
5296                 switch (laddr->ifa->address.sa.sa_family) {
5297 #ifdef INET6
5298                 case AF_INET6:
5299                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5300                         break;
5301 #endif
5302 #ifdef INET
5303                 case AF_INET:
5304                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5305                         break;
5306 #endif
5307                 default:
5308                         break;
5309                 }
5310         }
5311 }
5312
5313 /*
5314  * Add the address to the endpoint local address list There is nothing to be
5315  * done if we are bound to all addresses
5316  */
5317 void
5318 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5319 {
5320         struct sctp_laddr *laddr;
5321         int fnd, error = 0;
5322
5323         fnd = 0;
5324
5325         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5326                 /* You are already bound to all. You have it already */
5327                 return;
5328         }
5329 #ifdef INET6
5330         if (ifa->address.sa.sa_family == AF_INET6) {
5331                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5332                         /* Can't bind a non-useable addr. */
5333                         return;
5334                 }
5335         }
5336 #endif
5337         /* first, is it already present? */
5338         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5339                 if (laddr->ifa == ifa) {
5340                         fnd = 1;
5341                         break;
5342                 }
5343         }
5344
5345         if (fnd == 0) {
5346                 /* Not in the ep list */
5347                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5348                 if (error != 0)
5349                         return;
5350                 inp->laddr_count++;
5351                 /* update inp_vflag flags */
5352                 switch (ifa->address.sa.sa_family) {
5353 #ifdef INET6
5354                 case AF_INET6:
5355                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5356                         break;
5357 #endif
5358 #ifdef INET
5359                 case AF_INET:
5360                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5361                         break;
5362 #endif
5363                 default:
5364                         break;
5365                 }
5366         }
5367         return;
5368 }
5369
5370
5371 /*
5372  * select a new (hopefully reachable) destination net (should only be used
5373  * when we deleted an ep addr that is the only usable source address to reach
5374  * the destination net)
5375  */
5376 static void
5377 sctp_select_primary_destination(struct sctp_tcb *stcb)
5378 {
5379         struct sctp_nets *net;
5380
5381         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5382                 /* for now, we'll just pick the first reachable one we find */
5383                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5384                         continue;
5385                 if (sctp_destination_is_reachable(stcb,
5386                     (struct sockaddr *)&net->ro._l_addr)) {
5387                         /* found a reachable destination */
5388                         stcb->asoc.primary_destination = net;
5389                 }
5390         }
5391         /* I can't there from here! ...we're gonna die shortly... */
5392 }
5393
5394
5395 /*
5396  * Delete the address from the endpoint local address list There is nothing
5397  * to be done if we are bound to all addresses
5398  */
5399 void
5400 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5401 {
5402         struct sctp_laddr *laddr;
5403         int fnd;
5404
5405         fnd = 0;
5406         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5407                 /* You are already bound to all. You have it already */
5408                 return;
5409         }
5410         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5411                 if (laddr->ifa == ifa) {
5412                         fnd = 1;
5413                         break;
5414                 }
5415         }
5416         if (fnd && (inp->laddr_count < 2)) {
5417                 /* can't delete unless there are at LEAST 2 addresses */
5418                 return;
5419         }
5420         if (fnd) {
5421                 /*
5422                  * clean up any use of this address go through our
5423                  * associations and clear any last_used_address that match
5424                  * this one for each assoc, see if a new primary_destination
5425                  * is needed
5426                  */
5427                 struct sctp_tcb *stcb;
5428
5429                 /* clean up "next_addr_touse" */
5430                 if (inp->next_addr_touse == laddr)
5431                         /* delete this address */
5432                         inp->next_addr_touse = NULL;
5433
5434                 /* clean up "last_used_address" */
5435                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5436                         struct sctp_nets *net;
5437
5438                         SCTP_TCB_LOCK(stcb);
5439                         if (stcb->asoc.last_used_address == laddr)
5440                                 /* delete this address */
5441                                 stcb->asoc.last_used_address = NULL;
5442                         /*
5443                          * Now spin through all the nets and purge any ref
5444                          * to laddr
5445                          */
5446                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5447                                 if (net->ro._s_addr &&
5448                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5449                                         /* Yep, purge src address selected */
5450                                         sctp_rtentry_t *rt;
5451
5452                                         /* delete this address if cached */
5453                                         rt = net->ro.ro_rt;
5454                                         if (rt != NULL) {
5455                                                 RTFREE(rt);
5456                                                 net->ro.ro_rt = NULL;
5457                                         }
5458                                         sctp_free_ifa(net->ro._s_addr);
5459                                         net->ro._s_addr = NULL;
5460                                         net->src_addr_selected = 0;
5461                                 }
5462                         }
5463                         SCTP_TCB_UNLOCK(stcb);
5464                 }               /* for each tcb */
5465                 /* remove it from the ep list */
5466                 sctp_remove_laddr(laddr);
5467                 inp->laddr_count--;
5468                 /* update inp_vflag flags */
5469                 sctp_update_ep_vflag(inp);
5470         }
5471         return;
5472 }
5473
5474 /*
5475  * Add the address to the TCB local address restricted list.
5476  * This is a "pending" address list (eg. addresses waiting for an
5477  * ASCONF-ACK response) and cannot be used as a valid source address.
5478  */
5479 void
5480 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5481 {
5482         struct sctp_laddr *laddr;
5483         struct sctpladdr *list;
5484
5485         /*
5486          * Assumes TCB is locked.. and possibly the INP. May need to
5487          * confirm/fix that if we need it and is not the case.
5488          */
5489         list = &stcb->asoc.sctp_restricted_addrs;
5490
5491 #ifdef INET6
5492         if (ifa->address.sa.sa_family == AF_INET6) {
5493                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5494                         /* Can't bind a non-existent addr. */
5495                         return;
5496                 }
5497         }
5498 #endif
5499         /* does the address already exist? */
5500         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5501                 if (laddr->ifa == ifa) {
5502                         return;
5503                 }
5504         }
5505
5506         /* add to the list */
5507         (void)sctp_insert_laddr(list, ifa, 0);
5508         return;
5509 }
5510
5511 /*
5512  * insert an laddr entry with the given ifa for the desired list
5513  */
5514 int
5515 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5516 {
5517         struct sctp_laddr *laddr;
5518
5519         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5520         if (laddr == NULL) {
5521                 /* out of memory? */
5522                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5523                 return (EINVAL);
5524         }
5525         SCTP_INCR_LADDR_COUNT();
5526         bzero(laddr, sizeof(*laddr));
5527         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5528         laddr->ifa = ifa;
5529         laddr->action = act;
5530         atomic_add_int(&ifa->refcount, 1);
5531         /* insert it */
5532         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5533
5534         return (0);
5535 }
5536
5537 /*
5538  * Remove an laddr entry from the local address list (on an assoc)
5539  */
5540 void
5541 sctp_remove_laddr(struct sctp_laddr *laddr)
5542 {
5543
5544         /* remove from the list */
5545         LIST_REMOVE(laddr, sctp_nxt_addr);
5546         sctp_free_ifa(laddr->ifa);
5547         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5548         SCTP_DECR_LADDR_COUNT();
5549 }
5550
5551 /*
5552  * Remove a local address from the TCB local address restricted list
5553  */
5554 void
5555 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5556 {
5557         struct sctp_inpcb *inp;
5558         struct sctp_laddr *laddr;
5559
5560         /*
5561          * This is called by asconf work. It is assumed that a) The TCB is
5562          * locked and b) The INP is locked. This is true in as much as I can
5563          * trace through the entry asconf code where I did these locks.
5564          * Again, the ASCONF code is a bit different in that it does lock
5565          * the INP during its work often times. This must be since we don't
5566          * want other proc's looking up things while what they are looking
5567          * up is changing :-D
5568          */
5569
5570         inp = stcb->sctp_ep;
5571         /* if subset bound and don't allow ASCONF's, can't delete last */
5572         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5573             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5574                 if (stcb->sctp_ep->laddr_count < 2) {
5575                         /* can't delete last address */
5576                         return;
5577                 }
5578         }
5579         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5580                 /* remove the address if it exists */
5581                 if (laddr->ifa == NULL)
5582                         continue;
5583                 if (laddr->ifa == ifa) {
5584                         sctp_remove_laddr(laddr);
5585                         return;
5586                 }
5587         }
5588
5589         /* address not found! */
5590         return;
5591 }
5592
5593 /*
5594  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5595  */
5596 /* sysctl */
5597 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5598 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5599
5600
5601
5602 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5603 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5604 int *sctp_cpuarry = NULL;
5605 void
5606 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5607 {
5608         /* Queue a packet to a processor for the specified core */
5609         struct sctp_mcore_queue *qent;
5610         struct sctp_mcore_ctrl *wkq;
5611         int need_wake = 0;
5612
5613         if (sctp_mcore_workers == NULL) {
5614                 /* Something went way bad during setup */
5615                 sctp_input_with_port(m, off, 0);
5616                 return;
5617         }
5618         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5619             (sizeof(struct sctp_mcore_queue)),
5620             SCTP_M_MCORE);
5621         if (qent == NULL) {
5622                 /* This is trouble  */
5623                 sctp_input_with_port(m, off, 0);
5624                 return;
5625         }
5626         qent->vn = curvnet;
5627         qent->m = m;
5628         qent->off = off;
5629         qent->v6 = 0;
5630         wkq = &sctp_mcore_workers[cpu_to_use];
5631         SCTP_MCORE_QLOCK(wkq);
5632
5633         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5634         if (wkq->running == 0) {
5635                 need_wake = 1;
5636         }
5637         SCTP_MCORE_QUNLOCK(wkq);
5638         if (need_wake) {
5639                 wakeup(&wkq->running);
5640         }
5641 }
5642
5643 static void
5644 sctp_mcore_thread(void *arg)
5645 {
5646
5647         struct sctp_mcore_ctrl *wkq;
5648         struct sctp_mcore_queue *qent;
5649
5650         wkq = (struct sctp_mcore_ctrl *)arg;
5651         struct mbuf *m;
5652         int off, v6;
5653
5654         /* Wait for first tickle */
5655         SCTP_MCORE_LOCK(wkq);
5656         wkq->running = 0;
5657         msleep(&wkq->running,
5658             &wkq->core_mtx,
5659             0, "wait for pkt", 0);
5660         SCTP_MCORE_UNLOCK(wkq);
5661
5662         /* Bind to our cpu */
5663         thread_lock(curthread);
5664         sched_bind(curthread, wkq->cpuid);
5665         thread_unlock(curthread);
5666
5667         /* Now lets start working */
5668         SCTP_MCORE_LOCK(wkq);
5669         /* Now grab lock and go */
5670         for (;;) {
5671                 SCTP_MCORE_QLOCK(wkq);
5672 skip_sleep:
5673                 wkq->running = 1;
5674                 qent = TAILQ_FIRST(&wkq->que);
5675                 if (qent) {
5676                         TAILQ_REMOVE(&wkq->que, qent, next);
5677                         SCTP_MCORE_QUNLOCK(wkq);
5678                         CURVNET_SET(qent->vn);
5679                         m = qent->m;
5680                         off = qent->off;
5681                         v6 = qent->v6;
5682                         SCTP_FREE(qent, SCTP_M_MCORE);
5683                         if (v6 == 0) {
5684                                 sctp_input_with_port(m, off, 0);
5685                         } else {
5686                                 SCTP_PRINTF("V6 not yet supported\n");
5687                                 sctp_m_freem(m);
5688                         }
5689                         CURVNET_RESTORE();
5690                         SCTP_MCORE_QLOCK(wkq);
5691                 }
5692                 wkq->running = 0;
5693                 if (!TAILQ_EMPTY(&wkq->que)) {
5694                         goto skip_sleep;
5695                 }
5696                 SCTP_MCORE_QUNLOCK(wkq);
5697                 msleep(&wkq->running,
5698                     &wkq->core_mtx,
5699                     0, "wait for pkt", 0);
5700         }
5701 }
5702
5703 static void
5704 sctp_startup_mcore_threads(void)
5705 {
5706         int i, cpu;
5707
5708         if (mp_ncpus == 1)
5709                 return;
5710
5711         if (sctp_mcore_workers != NULL) {
5712                 /*
5713                  * Already been here in some previous vnet?
5714                  */
5715                 return;
5716         }
5717         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5718             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5719             SCTP_M_MCORE);
5720         if (sctp_mcore_workers == NULL) {
5721                 /* TSNH I hope */
5722                 return;
5723         }
5724         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5725             sizeof(struct sctp_mcore_ctrl)));
5726         /* Init the structures */
5727         for (i = 0; i <= mp_maxid; i++) {
5728                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5729                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5730                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5731                 sctp_mcore_workers[i].cpuid = i;
5732         }
5733         if (sctp_cpuarry == NULL) {
5734                 SCTP_MALLOC(sctp_cpuarry, int *,
5735                     (mp_ncpus * sizeof(int)),
5736                     SCTP_M_MCORE);
5737                 i = 0;
5738                 CPU_FOREACH(cpu) {
5739                         sctp_cpuarry[i] = cpu;
5740                         i++;
5741                 }
5742         }
5743         /* Now start them all */
5744         CPU_FOREACH(cpu) {
5745                 (void)kproc_create(sctp_mcore_thread,
5746                     (void *)&sctp_mcore_workers[cpu],
5747                     &sctp_mcore_workers[cpu].thread_proc,
5748                     RFPROC,
5749                     SCTP_KTHREAD_PAGES,
5750                     SCTP_MCORE_NAME);
5751
5752         }
5753 }
5754
5755 #endif
5756
5757 void
5758 sctp_pcb_init()
5759 {
5760         /*
5761          * SCTP initialization for the PCB structures should be called by
5762          * the sctp_init() funciton.
5763          */
5764         int i;
5765         struct timeval tv;
5766
5767         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5768                 /* error I was called twice */
5769                 return;
5770         }
5771         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5772
5773 #if defined(SCTP_LOCAL_TRACE_BUF)
5774         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5775 #endif
5776 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5777         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5778             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5779             SCTP_M_MCORE);
5780 #endif
5781         (void)SCTP_GETTIME_TIMEVAL(&tv);
5782 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5783         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5784         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5785         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5786 #else
5787         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5788         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5789         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5790 #endif
5791         /* init the empty list of (All) Endpoints */
5792         LIST_INIT(&SCTP_BASE_INFO(listhead));
5793
5794
5795         /* init the hash table of endpoints */
5796         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5797         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5798         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5799         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5800             &SCTP_BASE_INFO(hashasocmark));
5801         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5802             &SCTP_BASE_INFO(hashmark));
5803         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5804             &SCTP_BASE_INFO(hashtcpmark));
5805         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5806
5807
5808         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5809             &SCTP_BASE_INFO(hashvrfmark));
5810
5811         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5812             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5813         /* init the zones */
5814         /*
5815          * FIX ME: Should check for NULL returns, but if it does fail we are
5816          * doomed to panic anyways... add later maybe.
5817          */
5818         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5819             sizeof(struct sctp_inpcb), maxsockets);
5820
5821         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5822             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5823
5824         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5825             sizeof(struct sctp_laddr),
5826             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5827
5828         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5829             sizeof(struct sctp_nets),
5830             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5831
5832         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5833             sizeof(struct sctp_tmit_chunk),
5834             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5835
5836         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5837             sizeof(struct sctp_queued_to_read),
5838             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5839
5840         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5841             sizeof(struct sctp_stream_queue_pending),
5842             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5843
5844         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5845             sizeof(struct sctp_asconf),
5846             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5847
5848         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5849             sizeof(struct sctp_asconf_ack),
5850             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5851
5852
5853         /* Master Lock INIT for info structure */
5854         SCTP_INP_INFO_LOCK_INIT();
5855         SCTP_STATLOG_INIT_LOCK();
5856
5857         SCTP_IPI_COUNT_INIT();
5858         SCTP_IPI_ADDR_INIT();
5859 #ifdef SCTP_PACKET_LOGGING
5860         SCTP_IP_PKTLOG_INIT();
5861 #endif
5862         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5863
5864         SCTP_WQ_ADDR_INIT();
5865         /* not sure if we need all the counts */
5866         SCTP_BASE_INFO(ipi_count_ep) = 0;
5867         /* assoc/tcb zone info */
5868         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5869         /* local addrlist zone info */
5870         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5871         /* remote addrlist zone info */
5872         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5873         /* chunk info */
5874         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5875
5876         /* socket queue zone info */
5877         SCTP_BASE_INFO(ipi_count_readq) = 0;
5878
5879         /* stream out queue cont */
5880         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5881
5882         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5883         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5884
5885         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5886
5887         /* Init the TIMEWAIT list */
5888         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5889                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5890         }
5891         sctp_startup_iterator();
5892
5893 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5894         sctp_startup_mcore_threads();
5895 #endif
5896
5897         /*
5898          * INIT the default VRF which for BSD is the only one, other O/S's
5899          * may have more. But initially they must start with one and then
5900          * add the VRF's as addresses are added.
5901          */
5902         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5903 }
5904
5905 /*
5906  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5907  */
5908 void
5909 sctp_pcb_finish(void)
5910 {
5911         struct sctp_vrflist *vrf_bucket;
5912         struct sctp_vrf *vrf, *nvrf;
5913         struct sctp_ifn *ifn, *nifn;
5914         struct sctp_ifa *ifa, *nifa;
5915         struct sctpvtaghead *chain;
5916         struct sctp_tagblock *twait_block, *prev_twait_block;
5917         struct sctp_laddr *wi, *nwi;
5918         int i;
5919         struct sctp_iterator *it, *nit;
5920
5921         /*
5922          * In FreeBSD the iterator thread never exits but we do clean up.
5923          * The only way FreeBSD reaches here is if we have VRF's but we
5924          * still add the ifdef to make it compile on old versions.
5925          */
5926         SCTP_IPI_ITERATOR_WQ_LOCK();
5927         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5928                 if (it->vn != curvnet) {
5929                         continue;
5930                 }
5931                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5932                 if (it->function_atend != NULL) {
5933                         (*it->function_atend) (it->pointer, it->val);
5934                 }
5935                 SCTP_FREE(it, SCTP_M_ITER);
5936         }
5937         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5938         SCTP_ITERATOR_LOCK();
5939         if ((sctp_it_ctl.cur_it) &&
5940             (sctp_it_ctl.cur_it->vn == curvnet)) {
5941                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5942         }
5943         SCTP_ITERATOR_UNLOCK();
5944         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5945         SCTP_WQ_ADDR_LOCK();
5946         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5947                 LIST_REMOVE(wi, sctp_nxt_addr);
5948                 SCTP_DECR_LADDR_COUNT();
5949                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5950                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
5951                 }
5952                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5953         }
5954         SCTP_WQ_ADDR_UNLOCK();
5955
5956         /*
5957          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5958          * destroyed first).
5959          */
5960         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5961         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5962                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5963                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5964                                 /* free the ifa */
5965                                 LIST_REMOVE(ifa, next_bucket);
5966                                 LIST_REMOVE(ifa, next_ifa);
5967                                 SCTP_FREE(ifa, SCTP_M_IFA);
5968                         }
5969                         /* free the ifn */
5970                         LIST_REMOVE(ifn, next_bucket);
5971                         LIST_REMOVE(ifn, next_ifn);
5972                         SCTP_FREE(ifn, SCTP_M_IFN);
5973                 }
5974                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5975                 /* free the vrf */
5976                 LIST_REMOVE(vrf, next_vrf);
5977                 SCTP_FREE(vrf, SCTP_M_VRF);
5978         }
5979         /* free the vrf hashes */
5980         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5981         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5982
5983         /*
5984          * free the TIMEWAIT list elements malloc'd in the function
5985          * sctp_add_vtag_to_timewait()...
5986          */
5987         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5988                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5989                 if (!LIST_EMPTY(chain)) {
5990                         prev_twait_block = NULL;
5991                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5992                                 if (prev_twait_block) {
5993                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5994                                 }
5995                                 prev_twait_block = twait_block;
5996                         }
5997                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5998                 }
5999         }
6000
6001         /* free the locks and mutexes */
6002 #ifdef SCTP_PACKET_LOGGING
6003         SCTP_IP_PKTLOG_DESTROY();
6004 #endif
6005         SCTP_IPI_ADDR_DESTROY();
6006         SCTP_STATLOG_DESTROY();
6007         SCTP_INP_INFO_LOCK_DESTROY();
6008
6009         SCTP_WQ_ADDR_DESTROY();
6010
6011         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6012         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6013         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6014         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6015         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6016         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6017         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6018         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6019         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6020         /* Get rid of other stuff to */
6021         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6022                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6023         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6024                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6025         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6026                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6027 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6028         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6029 #endif
6030 }
6031
6032
6033 int
6034 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6035     int offset, int limit,
6036     struct sockaddr *src, struct sockaddr *dst,
6037     struct sockaddr *altsa)
6038 {
6039         /*
6040          * grub through the INIT pulling addresses and loading them to the
6041          * nets structure in the asoc. The from address in the mbuf should
6042          * also be loaded (if it is not already). This routine can be called
6043          * with either INIT or INIT-ACK's as long as the m points to the IP
6044          * packet and the offset points to the beginning of the parameters.
6045          */
6046         struct sctp_inpcb *inp;
6047         struct sctp_nets *net, *nnet, *net_tmp;
6048         struct sctp_paramhdr *phdr, parm_buf;
6049         struct sctp_tcb *stcb_tmp;
6050         uint16_t ptype, plen;
6051         struct sockaddr *sa;
6052         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6053         struct sctp_auth_random *p_random = NULL;
6054         uint16_t random_len = 0;
6055         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6056         struct sctp_auth_hmac_algo *hmacs = NULL;
6057         uint16_t hmacs_len = 0;
6058         uint8_t saw_asconf = 0;
6059         uint8_t saw_asconf_ack = 0;
6060         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6061         struct sctp_auth_chunk_list *chunks = NULL;
6062         uint16_t num_chunks = 0;
6063         sctp_key_t *new_key;
6064         uint32_t keylen;
6065         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6066         uint8_t peer_supports_ecn;
6067         uint8_t peer_supports_prsctp;
6068         uint8_t peer_supports_auth;
6069         uint8_t peer_supports_asconf;
6070         uint8_t peer_supports_asconf_ack;
6071         uint8_t peer_supports_reconfig;
6072         uint8_t peer_supports_nrsack;
6073         uint8_t peer_supports_pktdrop;
6074
6075 #ifdef INET
6076         struct sockaddr_in sin;
6077
6078 #endif
6079 #ifdef INET6
6080         struct sockaddr_in6 sin6;
6081
6082 #endif
6083
6084         /* First get the destination address setup too. */
6085 #ifdef INET
6086         memset(&sin, 0, sizeof(sin));
6087         sin.sin_family = AF_INET;
6088         sin.sin_len = sizeof(sin);
6089         sin.sin_port = stcb->rport;
6090 #endif
6091 #ifdef INET6
6092         memset(&sin6, 0, sizeof(sin6));
6093         sin6.sin6_family = AF_INET6;
6094         sin6.sin6_len = sizeof(struct sockaddr_in6);
6095         sin6.sin6_port = stcb->rport;
6096 #endif
6097         if (altsa) {
6098                 sa = altsa;
6099         } else {
6100                 sa = src;
6101         }
6102         peer_supports_ecn = 0;
6103         peer_supports_prsctp = 0;
6104         peer_supports_auth = 0;
6105         peer_supports_asconf = 0;
6106         peer_supports_reconfig = 0;
6107         peer_supports_nrsack = 0;
6108         peer_supports_pktdrop = 0;
6109         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6110                 /* mark all addresses that we have currently on the list */
6111                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6112         }
6113         /* does the source address already exist? if so skip it */
6114         inp = stcb->sctp_ep;
6115         atomic_add_int(&stcb->asoc.refcnt, 1);
6116         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6117         atomic_add_int(&stcb->asoc.refcnt, -1);
6118
6119         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6120                 /* we must add the source address */
6121                 /* no scope set here since we have a tcb already. */
6122                 switch (sa->sa_family) {
6123 #ifdef INET
6124                 case AF_INET:
6125                         if (stcb->asoc.scope.ipv4_addr_legal) {
6126                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6127                                         return (-1);
6128                                 }
6129                         }
6130                         break;
6131 #endif
6132 #ifdef INET6
6133                 case AF_INET6:
6134                         if (stcb->asoc.scope.ipv6_addr_legal) {
6135                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6136                                         return (-2);
6137                                 }
6138                         }
6139                         break;
6140 #endif
6141                 default:
6142                         break;
6143                 }
6144         } else {
6145                 if (net_tmp != NULL && stcb_tmp == stcb) {
6146                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6147                 } else if (stcb_tmp != stcb) {
6148                         /* It belongs to another association? */
6149                         if (stcb_tmp)
6150                                 SCTP_TCB_UNLOCK(stcb_tmp);
6151                         return (-3);
6152                 }
6153         }
6154         if (stcb->asoc.state == 0) {
6155                 /* the assoc was freed? */
6156                 return (-4);
6157         }
6158         /* now we must go through each of the params. */
6159         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6160         while (phdr) {
6161                 ptype = ntohs(phdr->param_type);
6162                 plen = ntohs(phdr->param_length);
6163                 /*
6164                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6165                  * (uint32_t)ptype, (int)plen);
6166                  */
6167                 if (offset + plen > limit) {
6168                         break;
6169                 }
6170                 if (plen == 0) {
6171                         break;
6172                 }
6173 #ifdef INET
6174                 if (ptype == SCTP_IPV4_ADDRESS) {
6175                         if (stcb->asoc.scope.ipv4_addr_legal) {
6176                                 struct sctp_ipv4addr_param *p4, p4_buf;
6177
6178                                 /* ok get the v4 address and check/add */
6179                                 phdr = sctp_get_next_param(m, offset,
6180                                     (struct sctp_paramhdr *)&p4_buf,
6181                                     sizeof(p4_buf));
6182                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6183                                     phdr == NULL) {
6184                                         return (-5);
6185                                 }
6186                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6187                                 sin.sin_addr.s_addr = p4->addr;
6188                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6189                                         /* Skip multi-cast addresses */
6190                                         goto next_param;
6191                                 }
6192                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6193                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6194                                         goto next_param;
6195                                 }
6196                                 sa = (struct sockaddr *)&sin;
6197                                 inp = stcb->sctp_ep;
6198                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6199                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6200                                     dst, stcb);
6201                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6202
6203                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6204                                     inp == NULL) {
6205                                         /* we must add the source address */
6206                                         /*
6207                                          * no scope set since we have a tcb
6208                                          * already
6209                                          */
6210
6211                                         /*
6212                                          * we must validate the state again
6213                                          * here
6214                                          */
6215                         add_it_now:
6216                                         if (stcb->asoc.state == 0) {
6217                                                 /* the assoc was freed? */
6218                                                 return (-7);
6219                                         }
6220                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6221                                                 return (-8);
6222                                         }
6223                                 } else if (stcb_tmp == stcb) {
6224                                         if (stcb->asoc.state == 0) {
6225                                                 /* the assoc was freed? */
6226                                                 return (-10);
6227                                         }
6228                                         if (net != NULL) {
6229                                                 /* clear flag */
6230                                                 net->dest_state &=
6231                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6232                                         }
6233                                 } else {
6234                                         /*
6235                                          * strange, address is in another
6236                                          * assoc? straighten out locks.
6237                                          */
6238                                         if (stcb_tmp) {
6239                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6240                                                         struct mbuf *op_err;
6241                                                         char msg[SCTP_DIAG_INFO_LEN];
6242
6243                                                         /*
6244                                                          * in setup state we
6245                                                          * abort this guy
6246                                                          */
6247                                                         snprintf(msg, sizeof(msg),
6248                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6249                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6250                                                             msg);
6251                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6252                                                             stcb_tmp, op_err,
6253                                                             SCTP_SO_NOT_LOCKED);
6254                                                         goto add_it_now;
6255                                                 }
6256                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6257                                         }
6258                                         if (stcb->asoc.state == 0) {
6259                                                 /* the assoc was freed? */
6260                                                 return (-12);
6261                                         }
6262                                         return (-13);
6263                                 }
6264                         }
6265                 } else
6266 #endif
6267 #ifdef INET6
6268                 if (ptype == SCTP_IPV6_ADDRESS) {
6269                         if (stcb->asoc.scope.ipv6_addr_legal) {
6270                                 /* ok get the v6 address and check/add */
6271                                 struct sctp_ipv6addr_param *p6, p6_buf;
6272
6273                                 phdr = sctp_get_next_param(m, offset,
6274                                     (struct sctp_paramhdr *)&p6_buf,
6275                                     sizeof(p6_buf));
6276                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6277                                     phdr == NULL) {
6278                                         return (-14);
6279                                 }
6280                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6281                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6282                                     sizeof(p6->addr));
6283                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6284                                         /* Skip multi-cast addresses */
6285                                         goto next_param;
6286                                 }
6287                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6288                                         /*
6289                                          * Link local make no sense without
6290                                          * scope
6291                                          */
6292                                         goto next_param;
6293                                 }
6294                                 sa = (struct sockaddr *)&sin6;
6295                                 inp = stcb->sctp_ep;
6296                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6297                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6298                                     dst, stcb);
6299                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6300                                 if (stcb_tmp == NULL &&
6301                                     (inp == stcb->sctp_ep || inp == NULL)) {
6302                                         /*
6303                                          * we must validate the state again
6304                                          * here
6305                                          */
6306                         add_it_now6:
6307                                         if (stcb->asoc.state == 0) {
6308                                                 /* the assoc was freed? */
6309                                                 return (-16);
6310                                         }
6311                                         /*
6312                                          * we must add the address, no scope
6313                                          * set
6314                                          */
6315                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6316                                                 return (-17);
6317                                         }
6318                                 } else if (stcb_tmp == stcb) {
6319                                         /*
6320                                          * we must validate the state again
6321                                          * here
6322                                          */
6323                                         if (stcb->asoc.state == 0) {
6324                                                 /* the assoc was freed? */
6325                                                 return (-19);
6326                                         }
6327                                         if (net != NULL) {
6328                                                 /* clear flag */
6329                                                 net->dest_state &=
6330                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6331                                         }
6332                                 } else {
6333                                         /*
6334                                          * strange, address is in another
6335                                          * assoc? straighten out locks.
6336                                          */
6337                                         if (stcb_tmp) {
6338                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6339                                                         struct mbuf *op_err;
6340                                                         char msg[SCTP_DIAG_INFO_LEN];
6341
6342                                                         /*
6343                                                          * in setup state we
6344                                                          * abort this guy
6345                                                          */
6346                                                         snprintf(msg, sizeof(msg),
6347                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6348                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6349                                                             msg);
6350                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6351                                                             stcb_tmp, op_err,
6352                                                             SCTP_SO_NOT_LOCKED);
6353                                                         goto add_it_now6;
6354                                                 }
6355                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6356                                         }
6357                                         if (stcb->asoc.state == 0) {
6358                                                 /* the assoc was freed? */
6359                                                 return (-21);
6360                                         }
6361                                         return (-22);
6362                                 }
6363                         }
6364                 } else
6365 #endif
6366                 if (ptype == SCTP_ECN_CAPABLE) {
6367                         peer_supports_ecn = 1;
6368                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6369                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6370                                 struct sctp_adaptation_layer_indication ai,
6371                                                                 *aip;
6372
6373                                 phdr = sctp_get_next_param(m, offset,
6374                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6375                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6376                                 if (aip) {
6377                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6378                                         stcb->asoc.adaptation_needed = 1;
6379                                 }
6380                         }
6381                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6382                         struct sctp_asconf_addr_param lstore, *fee;
6383                         int lptype;
6384                         struct sockaddr *lsa = NULL;
6385
6386 #ifdef INET
6387                         struct sctp_asconf_addrv4_param *fii;
6388
6389 #endif
6390
6391                         if (stcb->asoc.asconf_supported == 0) {
6392                                 return (-100);
6393                         }
6394                         if (plen > sizeof(lstore)) {
6395                                 return (-23);
6396                         }
6397                         phdr = sctp_get_next_param(m, offset,
6398                             (struct sctp_paramhdr *)&lstore,
6399                             min(plen, sizeof(lstore)));
6400                         if (phdr == NULL) {
6401                                 return (-24);
6402                         }
6403                         fee = (struct sctp_asconf_addr_param *)phdr;
6404                         lptype = ntohs(fee->addrp.ph.param_type);
6405                         switch (lptype) {
6406 #ifdef INET
6407                         case SCTP_IPV4_ADDRESS:
6408                                 if (plen !=
6409                                     sizeof(struct sctp_asconf_addrv4_param)) {
6410                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6411                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6412                                             plen);
6413                                 } else {
6414                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6415                                         sin.sin_addr.s_addr = fii->addrp.addr;
6416                                         lsa = (struct sockaddr *)&sin;
6417                                 }
6418                                 break;
6419 #endif
6420 #ifdef INET6
6421                         case SCTP_IPV6_ADDRESS:
6422                                 if (plen !=
6423                                     sizeof(struct sctp_asconf_addr_param)) {
6424                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6425                                             (int)sizeof(struct sctp_asconf_addr_param),
6426                                             plen);
6427                                 } else {
6428                                         memcpy(sin6.sin6_addr.s6_addr,
6429                                             fee->addrp.addr,
6430                                             sizeof(fee->addrp.addr));
6431                                         lsa = (struct sockaddr *)&sin6;
6432                                 }
6433                                 break;
6434 #endif
6435                         default:
6436                                 break;
6437                         }
6438                         if (lsa) {
6439                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6440                         }
6441                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6442                         stcb->asoc.peer_supports_nat = 1;
6443                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6444                         /* Peer supports pr-sctp */
6445                         peer_supports_prsctp = 1;
6446                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6447                         /* A supported extension chunk */
6448                         struct sctp_supported_chunk_types_param *pr_supported;
6449                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6450                         int num_ent, i;
6451
6452                         phdr = sctp_get_next_param(m, offset,
6453                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6454                         if (phdr == NULL) {
6455                                 return (-25);
6456                         }
6457                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6458                         num_ent = plen - sizeof(struct sctp_paramhdr);
6459                         for (i = 0; i < num_ent; i++) {
6460                                 switch (pr_supported->chunk_types[i]) {
6461                                 case SCTP_ASCONF:
6462                                         peer_supports_asconf = 1;
6463                                         break;
6464                                 case SCTP_ASCONF_ACK:
6465                                         peer_supports_asconf_ack = 1;
6466                                         break;
6467                                 case SCTP_FORWARD_CUM_TSN:
6468                                         peer_supports_prsctp = 1;
6469                                         break;
6470                                 case SCTP_PACKET_DROPPED:
6471                                         peer_supports_pktdrop = 1;
6472                                         break;
6473                                 case SCTP_NR_SELECTIVE_ACK:
6474                                         peer_supports_nrsack = 1;
6475                                         break;
6476                                 case SCTP_STREAM_RESET:
6477                                         peer_supports_reconfig = 1;
6478                                         break;
6479                                 case SCTP_AUTHENTICATION:
6480                                         peer_supports_auth = 1;
6481                                         break;
6482                                 default:
6483                                         /* one I have not learned yet */
6484                                         break;
6485
6486                                 }
6487                         }
6488                 } else if (ptype == SCTP_RANDOM) {
6489                         if (plen > sizeof(random_store))
6490                                 break;
6491                         if (got_random) {
6492                                 /* already processed a RANDOM */
6493                                 goto next_param;
6494                         }
6495                         phdr = sctp_get_next_param(m, offset,
6496                             (struct sctp_paramhdr *)random_store,
6497                             min(sizeof(random_store), plen));
6498                         if (phdr == NULL)
6499                                 return (-26);
6500                         p_random = (struct sctp_auth_random *)phdr;
6501                         random_len = plen - sizeof(*p_random);
6502                         /* enforce the random length */
6503                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6504                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6505                                 return (-27);
6506                         }
6507                         got_random = 1;
6508                 } else if (ptype == SCTP_HMAC_LIST) {
6509                         uint16_t num_hmacs;
6510                         uint16_t i;
6511
6512                         if (plen > sizeof(hmacs_store))
6513                                 break;
6514                         if (got_hmacs) {
6515                                 /* already processed a HMAC list */
6516                                 goto next_param;
6517                         }
6518                         phdr = sctp_get_next_param(m, offset,
6519                             (struct sctp_paramhdr *)hmacs_store,
6520                             min(plen, sizeof(hmacs_store)));
6521                         if (phdr == NULL)
6522                                 return (-28);
6523                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6524                         hmacs_len = plen - sizeof(*hmacs);
6525                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6526                         /* validate the hmac list */
6527                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6528                                 return (-29);
6529                         }
6530                         if (stcb->asoc.peer_hmacs != NULL)
6531                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6532                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6533                         if (stcb->asoc.peer_hmacs != NULL) {
6534                                 for (i = 0; i < num_hmacs; i++) {
6535                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6536                                             ntohs(hmacs->hmac_ids[i]));
6537                                 }
6538                         }
6539                         got_hmacs = 1;
6540                 } else if (ptype == SCTP_CHUNK_LIST) {
6541                         int i;
6542
6543                         if (plen > sizeof(chunks_store))
6544                                 break;
6545                         if (got_chklist) {
6546                                 /* already processed a Chunks list */
6547                                 goto next_param;
6548                         }
6549                         phdr = sctp_get_next_param(m, offset,
6550                             (struct sctp_paramhdr *)chunks_store,
6551                             min(plen, sizeof(chunks_store)));
6552                         if (phdr == NULL)
6553                                 return (-30);
6554                         chunks = (struct sctp_auth_chunk_list *)phdr;
6555                         num_chunks = plen - sizeof(*chunks);
6556                         if (stcb->asoc.peer_auth_chunks != NULL)
6557                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6558                         else
6559                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6560                         for (i = 0; i < num_chunks; i++) {
6561                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6562                                     stcb->asoc.peer_auth_chunks);
6563                                 /* record asconf/asconf-ack if listed */
6564                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6565                                         saw_asconf = 1;
6566                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6567                                         saw_asconf_ack = 1;
6568
6569                         }
6570                         got_chklist = 1;
6571                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6572                             (ptype == SCTP_STATE_COOKIE) ||
6573                             (ptype == SCTP_UNRECOG_PARAM) ||
6574                             (ptype == SCTP_COOKIE_PRESERVE) ||
6575                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6576                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6577                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6578                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6579                     (ptype == SCTP_SUCCESS_REPORT)) {
6580                          /* don't care */ ;
6581                 } else {
6582                         if ((ptype & 0x8000) == 0x0000) {
6583                                 /*
6584                                  * must stop processing the rest of the
6585                                  * param's. Any report bits were handled
6586                                  * with the call to
6587                                  * sctp_arethere_unrecognized_parameters()
6588                                  * when the INIT or INIT-ACK was first seen.
6589                                  */
6590                                 break;
6591                         }
6592                 }
6593
6594 next_param:
6595                 offset += SCTP_SIZE32(plen);
6596                 if (offset >= limit) {
6597                         break;
6598                 }
6599                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6600                     sizeof(parm_buf));
6601         }
6602         /* Now check to see if we need to purge any addresses */
6603         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6604                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6605                     SCTP_ADDR_NOT_IN_ASSOC) {
6606                         /* This address has been removed from the asoc */
6607                         /* remove and free it */
6608                         stcb->asoc.numnets--;
6609                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6610                         sctp_free_remote_addr(net);
6611                         if (net == stcb->asoc.primary_destination) {
6612                                 stcb->asoc.primary_destination = NULL;
6613                                 sctp_select_primary_destination(stcb);
6614                         }
6615                 }
6616         }
6617         if ((stcb->asoc.ecn_supported == 1) &&
6618             (peer_supports_ecn == 0)) {
6619                 stcb->asoc.ecn_supported = 0;
6620         }
6621         if ((stcb->asoc.prsctp_supported == 1) &&
6622             (peer_supports_prsctp == 0)) {
6623                 stcb->asoc.prsctp_supported = 0;
6624         }
6625         if ((stcb->asoc.auth_supported == 1) &&
6626             ((peer_supports_auth == 0) ||
6627             (got_random == 0) || (got_hmacs == 0))) {
6628                 stcb->asoc.auth_supported = 0;
6629         }
6630         if ((stcb->asoc.asconf_supported == 1) &&
6631             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6632             (stcb->asoc.auth_supported == 0) ||
6633             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6634                 stcb->asoc.asconf_supported = 0;
6635         }
6636         if ((stcb->asoc.reconfig_supported == 1) &&
6637             (peer_supports_reconfig == 0)) {
6638                 stcb->asoc.reconfig_supported = 0;
6639         }
6640         if ((stcb->asoc.nrsack_supported == 1) &&
6641             (peer_supports_nrsack == 0)) {
6642                 stcb->asoc.nrsack_supported = 0;
6643         }
6644         if ((stcb->asoc.pktdrop_supported == 1) &&
6645             (peer_supports_pktdrop == 0)) {
6646                 stcb->asoc.pktdrop_supported = 0;
6647         }
6648         /* validate authentication required parameters */
6649         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6650                 /* peer does not support auth but sent a chunks list? */
6651                 return (-31);
6652         }
6653         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6654                 /* peer supports asconf but not auth? */
6655                 return (-32);
6656         } else if ((peer_supports_asconf == 1) &&
6657                     (peer_supports_auth == 1) &&
6658             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6659                 return (-33);
6660         }
6661         /* concatenate the full random key */
6662         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6663         if (chunks != NULL) {
6664                 keylen += sizeof(*chunks) + num_chunks;
6665         }
6666         new_key = sctp_alloc_key(keylen);
6667         if (new_key != NULL) {
6668                 /* copy in the RANDOM */
6669                 if (p_random != NULL) {
6670                         keylen = sizeof(*p_random) + random_len;
6671                         bcopy(p_random, new_key->key, keylen);
6672                 }
6673                 /* append in the AUTH chunks */
6674                 if (chunks != NULL) {
6675                         bcopy(chunks, new_key->key + keylen,
6676                             sizeof(*chunks) + num_chunks);
6677                         keylen += sizeof(*chunks) + num_chunks;
6678                 }
6679                 /* append in the HMACs */
6680                 if (hmacs != NULL) {
6681                         bcopy(hmacs, new_key->key + keylen,
6682                             sizeof(*hmacs) + hmacs_len);
6683                 }
6684         } else {
6685                 /* failed to get memory for the key */
6686                 return (-34);
6687         }
6688         if (stcb->asoc.authinfo.peer_random != NULL)
6689                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6690         stcb->asoc.authinfo.peer_random = new_key;
6691         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6692         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6693
6694         return (0);
6695 }
6696
6697 int
6698 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6699     struct sctp_nets *net)
6700 {
6701         /* make sure the requested primary address exists in the assoc */
6702         if (net == NULL && sa)
6703                 net = sctp_findnet(stcb, sa);
6704
6705         if (net == NULL) {
6706                 /* didn't find the requested primary address! */
6707                 return (-1);
6708         } else {
6709                 /* set the primary address */
6710                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6711                         /* Must be confirmed, so queue to set */
6712                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6713                         return (0);
6714                 }
6715                 stcb->asoc.primary_destination = net;
6716                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6717                         sctp_free_remote_addr(stcb->asoc.alternate);
6718                         stcb->asoc.alternate = NULL;
6719                 }
6720                 net = TAILQ_FIRST(&stcb->asoc.nets);
6721                 if (net != stcb->asoc.primary_destination) {
6722                         /*
6723                          * first one on the list is NOT the primary
6724                          * sctp_cmpaddr() is much more efficient if the
6725                          * primary is the first on the list, make it so.
6726                          */
6727                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6728                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6729                 }
6730                 return (0);
6731         }
6732 }
6733
6734 int
6735 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6736 {
6737         /*
6738          * This function serves two purposes. It will see if a TAG can be
6739          * re-used and return 1 for yes it is ok and 0 for don't use that
6740          * tag. A secondary function it will do is purge out old tags that
6741          * can be removed.
6742          */
6743         struct sctpvtaghead *chain;
6744         struct sctp_tagblock *twait_block;
6745         struct sctpasochead *head;
6746         struct sctp_tcb *stcb;
6747         int i;
6748
6749         SCTP_INP_INFO_RLOCK();
6750         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6751             SCTP_BASE_INFO(hashasocmark))];
6752         LIST_FOREACH(stcb, head, sctp_asocs) {
6753                 /*
6754                  * We choose not to lock anything here. TCB's can't be
6755                  * removed since we have the read lock, so they can't be
6756                  * freed on us, same thing for the INP. I may be wrong with
6757                  * this assumption, but we will go with it for now :-)
6758                  */
6759                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6760                         continue;
6761                 }
6762                 if (stcb->asoc.my_vtag == tag) {
6763                         /* candidate */
6764                         if (stcb->rport != rport) {
6765                                 continue;
6766                         }
6767                         if (stcb->sctp_ep->sctp_lport != lport) {
6768                                 continue;
6769                         }
6770                         /* Its a used tag set */
6771                         SCTP_INP_INFO_RUNLOCK();
6772                         return (0);
6773                 }
6774         }
6775         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6776         /* Now what about timed wait ? */
6777         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6778                 /*
6779                  * Block(s) are present, lets see if we have this tag in the
6780                  * list
6781                  */
6782                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6783                         if (twait_block->vtag_block[i].v_tag == 0) {
6784                                 /* not used */
6785                                 continue;
6786                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6787                             now->tv_sec) {
6788                                 /* Audit expires this guy */
6789                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6790                                 twait_block->vtag_block[i].v_tag = 0;
6791                                 twait_block->vtag_block[i].lport = 0;
6792                                 twait_block->vtag_block[i].rport = 0;
6793                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6794                                     (twait_block->vtag_block[i].lport == lport) &&
6795                             (twait_block->vtag_block[i].rport == rport)) {
6796                                 /* Bad tag, sorry :< */
6797                                 SCTP_INP_INFO_RUNLOCK();
6798                                 return (0);
6799                         }
6800                 }
6801         }
6802         SCTP_INP_INFO_RUNLOCK();
6803         return (1);
6804 }
6805
6806 static void
6807 sctp_drain_mbufs(struct sctp_tcb *stcb)
6808 {
6809         /*
6810          * We must hunt this association for MBUF's past the cumack (i.e.
6811          * out of order data that we can renege on).
6812          */
6813         struct sctp_association *asoc;
6814         struct sctp_tmit_chunk *chk, *nchk;
6815         uint32_t cumulative_tsn_p1;
6816         struct sctp_queued_to_read *ctl, *nctl;
6817         int cnt, strmat;
6818         uint32_t gap, i;
6819         int fnd = 0;
6820
6821         /* We look for anything larger than the cum-ack + 1 */
6822
6823         asoc = &stcb->asoc;
6824         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6825                 /* none we can reneg on. */
6826                 return;
6827         }
6828         SCTP_STAT_INCR(sctps_protocol_drains_done);
6829         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6830         cnt = 0;
6831         /* First look in the re-assembly queue */
6832         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6833                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6834                         /* Yep it is above cum-ack */
6835                         cnt++;
6836                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6837                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6838                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6839                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6840                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6841                         if (chk->data) {
6842                                 sctp_m_freem(chk->data);
6843                                 chk->data = NULL;
6844                         }
6845                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6846                 }
6847         }
6848         /* Ok that was fun, now we will drain all the inbound streams? */
6849         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6850                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6851                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6852                                 /* Yep it is above cum-ack */
6853                                 cnt++;
6854                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6855                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6856                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6857                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6858                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6859                                 if (ctl->data) {
6860                                         sctp_m_freem(ctl->data);
6861                                         ctl->data = NULL;
6862                                 }
6863                                 sctp_free_remote_addr(ctl->whoFrom);
6864                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6865                                 SCTP_DECR_READQ_COUNT();
6866                         }
6867                 }
6868         }
6869         if (cnt) {
6870                 /* We must back down to see what the new highest is */
6871                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6872                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6873                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6874                                 asoc->highest_tsn_inside_map = i;
6875                                 fnd = 1;
6876                                 break;
6877                         }
6878                 }
6879                 if (!fnd) {
6880                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6881                 }
6882                 /*
6883                  * Question, should we go through the delivery queue? The
6884                  * only reason things are on here is the app not reading OR
6885                  * a p-d-api up. An attacker COULD send enough in to
6886                  * initiate the PD-API and then send a bunch of stuff to
6887                  * other streams... these would wind up on the delivery
6888                  * queue.. and then we would not get to them. But in order
6889                  * to do this I then have to back-track and un-deliver
6890                  * sequence numbers in streams.. el-yucko. I think for now
6891                  * we will NOT look at the delivery queue and leave it to be
6892                  * something to consider later. An alternative would be to
6893                  * abort the P-D-API with a notification and then deliver
6894                  * the data.... Or another method might be to keep track of
6895                  * how many times the situation occurs and if we see a
6896                  * possible attack underway just abort the association.
6897                  */
6898 #ifdef SCTP_DEBUG
6899                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6900 #endif
6901                 /*
6902                  * Now do we need to find a new
6903                  * asoc->highest_tsn_inside_map?
6904                  */
6905                 asoc->last_revoke_count = cnt;
6906                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6907                 /* sa_ignore NO_NULL_CHK */
6908                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6909                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6910         }
6911         /*
6912          * Another issue, in un-setting the TSN's in the mapping array we
6913          * DID NOT adjust the highest_tsn marker.  This will cause one of
6914          * two things to occur. It may cause us to do extra work in checking
6915          * for our mapping array movement. More importantly it may cause us
6916          * to SACK every datagram. This may not be a bad thing though since
6917          * we will recover once we get our cum-ack above and all this stuff
6918          * we dumped recovered.
6919          */
6920 }
6921
6922 void
6923 sctp_drain()
6924 {
6925         /*
6926          * We must walk the PCB lists for ALL associations here. The system
6927          * is LOW on MBUF's and needs help. This is where reneging will
6928          * occur. We really hope this does NOT happen!
6929          */
6930         VNET_ITERATOR_DECL(vnet_iter);
6931         VNET_LIST_RLOCK_NOSLEEP();
6932         VNET_FOREACH(vnet_iter) {
6933                 CURVNET_SET(vnet_iter);
6934                 struct sctp_inpcb *inp;
6935                 struct sctp_tcb *stcb;
6936
6937                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6938                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6939 #ifdef VIMAGE
6940                         continue;
6941 #else
6942                         return;
6943 #endif
6944                 }
6945                 SCTP_INP_INFO_RLOCK();
6946                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6947                         /* For each endpoint */
6948                         SCTP_INP_RLOCK(inp);
6949                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6950                                 /* For each association */
6951                                 SCTP_TCB_LOCK(stcb);
6952                                 sctp_drain_mbufs(stcb);
6953                                 SCTP_TCB_UNLOCK(stcb);
6954                         }
6955                         SCTP_INP_RUNLOCK(inp);
6956                 }
6957                 SCTP_INP_INFO_RUNLOCK();
6958                 CURVNET_RESTORE();
6959         }
6960         VNET_LIST_RUNLOCK_NOSLEEP();
6961 }
6962
6963 /*
6964  * start a new iterator
6965  * iterates through all endpoints and associations based on the pcb_state
6966  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6967  * assocs and "ef" (optional) is executed when the iterator completes.
6968  * "inpf" (optional) is executed for each new endpoint as it is being
6969  * iterated through. inpe (optional) is called when the inp completes
6970  * its way through all the stcbs.
6971  */
6972 int
6973 sctp_initiate_iterator(inp_func inpf,
6974     asoc_func af,
6975     inp_func inpe,
6976     uint32_t pcb_state,
6977     uint32_t pcb_features,
6978     uint32_t asoc_state,
6979     void *argp,
6980     uint32_t argi,
6981     end_func ef,
6982     struct sctp_inpcb *s_inp,
6983     uint8_t chunk_output_off)
6984 {
6985         struct sctp_iterator *it = NULL;
6986
6987         if (af == NULL) {
6988                 return (-1);
6989         }
6990         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6991             SCTP_M_ITER);
6992         if (it == NULL) {
6993                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6994                 return (ENOMEM);
6995         }
6996         memset(it, 0, sizeof(*it));
6997         it->function_assoc = af;
6998         it->function_inp = inpf;
6999         if (inpf)
7000                 it->done_current_ep = 0;
7001         else
7002                 it->done_current_ep = 1;
7003         it->function_atend = ef;
7004         it->pointer = argp;
7005         it->val = argi;
7006         it->pcb_flags = pcb_state;
7007         it->pcb_features = pcb_features;
7008         it->asoc_state = asoc_state;
7009         it->function_inp_end = inpe;
7010         it->no_chunk_output = chunk_output_off;
7011         it->vn = curvnet;
7012         if (s_inp) {
7013                 /* Assume lock is held here */
7014                 it->inp = s_inp;
7015                 SCTP_INP_INCR_REF(it->inp);
7016                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7017         } else {
7018                 SCTP_INP_INFO_RLOCK();
7019                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7020                 if (it->inp) {
7021                         SCTP_INP_INCR_REF(it->inp);
7022                 }
7023                 SCTP_INP_INFO_RUNLOCK();
7024                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7025
7026         }
7027         SCTP_IPI_ITERATOR_WQ_LOCK();
7028
7029         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7030         if (sctp_it_ctl.iterator_running == 0) {
7031                 sctp_wakeup_iterator();
7032         }
7033         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7034         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7035         return (0);
7036 }