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 #endif
  81
  82 void
  83 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  84 {
  85         /*
  86          * We really don't need to lock this, but I will just because it
  87          * does not hurt.
  88          */
  89         SCTP_INP_INFO_RLOCK();
  90         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  91         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  92         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  93         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  94         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  95         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  96         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  97         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
  98         SCTP_INP_INFO_RUNLOCK();
  99 }
 100
 101 /*-
 102  * Addresses are added to VRF's (Virtual Router's). For BSD we
 103  * have only the default VRF 0. We maintain a hash list of
 104  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
 105  * these has a list of addresses. When we add a new address
 106  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 107  * not exist we create it and add it to the list of IFN's
 108  * within the VRF. Once we have the sctp_ifn, we add the
 109  * address to the list. So we look something like:
 110  *
 111  * hash-vrf-table
 112  *   vrf-> ifn-> ifn -> ifn
 113  *   vrf    |
 114  *    ...   +--ifa-> ifa -> ifa
 115  *   vrf
 116  *
 117  * We keep these separate lists since the SCTP subsystem will
 118  * point to these from its source address selection nets structure.
 119  * When an address is deleted it does not happen right away on
 120  * the SCTP side, it gets scheduled. What we do when a
 121  * delete happens is immediately remove the address from
 122  * the master list and decrement the refcount. As our
 123  * addip iterator works through and frees the src address
 124  * selection pointing to the sctp_ifa, eventually the refcount
 125  * will reach 0 and we will delete it. Note that it is assumed
 126  * that any locking on system level ifn/ifa is done at the
 127  * caller of these functions and these routines will only
 128  * lock the SCTP structures as they add or delete things.
 129  *
 130  * Other notes on VRF concepts.
 131  *  - An endpoint can be in multiple VRF's
 132  *  - An association lives within a VRF and only one VRF.
 133  *  - Any incoming packet we can deduce the VRF for by
 134  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 135  *  - Any downward send call or connect call must supply the
 136  *    VRF via ancillary data or via some sort of set default
 137  *    VRF socket option call (again for BSD no brainer since
 138  *    the VRF is always 0).
 139  *  - An endpoint may add multiple VRF's to it.
 140  *  - Listening sockets can accept associations in any
 141  *    of the VRF's they are in but the assoc will end up
 142  *    in only one VRF (gotten from the packet or connect/send).
 143  *
 144  */
 145
 146 struct sctp_vrf *
 147 sctp_allocate_vrf(int vrf_id)
 148 {
 149         struct sctp_vrf *vrf = NULL;
 150         struct sctp_vrflist *bucket;
 151
 152         /* First allocate the VRF structure */
 153         vrf = sctp_find_vrf(vrf_id);
 154         if (vrf) {
 155                 /* Already allocated */
 156                 return (vrf);
 157         }
 158         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 159             SCTP_M_VRF);
 160         if (vrf == NULL) {
 161                 /* No memory */
 162 #ifdef INVARIANTS
 163                 panic("No memory for VRF:%d", vrf_id);
 164 #endif
 165                 return (NULL);
 166         }
 167         /* setup the VRF */
 168         memset(vrf, 0, sizeof(struct sctp_vrf));
 169         vrf->vrf_id = vrf_id;
 170         LIST_INIT(&vrf->ifnlist);
 171         vrf->total_ifa_count = 0;
 172         vrf->refcount = 0;
 173         /* now also setup table ids */
 174         SCTP_INIT_VRF_TABLEID(vrf);
 175         /* Init the HASH of addresses */
 176         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 177             &vrf->vrf_addr_hashmark);
 178         if (vrf->vrf_addr_hash == NULL) {
 179                 /* No memory */
 180 #ifdef INVARIANTS
 181                 panic("No memory for VRF:%d", vrf_id);
 182 #endif
 183                 SCTP_FREE(vrf, SCTP_M_VRF);
 184                 return (NULL);
 185         }
 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 unusable\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 unusable\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                 memset(wi, 0, 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_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 714                     (struct sctp_inpcb *)NULL,
 715                     (struct sctp_tcb *)NULL,
 716                     (struct sctp_nets *)NULL);
 717                 SCTP_WQ_ADDR_UNLOCK();
 718         } else {
 719                 /* it's ready for use */
 720                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 721         }
 722         return (sctp_ifap);
 723 }
 724
 725 void
 726 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 727     uint32_t ifn_index, const char *if_name)
 728 {
 729         struct sctp_vrf *vrf;
 730         struct sctp_ifa *sctp_ifap = NULL;
 731
 732         SCTP_IPI_ADDR_WLOCK();
 733         vrf = sctp_find_vrf(vrf_id);
 734         if (vrf == NULL) {
 735                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 736                 goto out_now;
 737         }
 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                 memset(wi, 0, 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_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 826                     (struct sctp_inpcb *)NULL,
 827                     (struct sctp_tcb *)NULL,
 828                     (struct sctp_nets *)NULL);
 829                 SCTP_WQ_ADDR_UNLOCK();
 830         }
 831         return;
 832 }
 833
 834
 835 static int
 836 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
 837 {
 838         int loopback_scope;
 839 #if defined(INET)
 840         int ipv4_local_scope, ipv4_addr_legal;
 841 #endif
 842 #if defined(INET6)
 843         int local_scope, site_scope, ipv6_addr_legal;
 844 #endif
 845         struct sctp_vrf *vrf;
 846         struct sctp_ifn *sctp_ifn;
 847         struct sctp_ifa *sctp_ifa;
 848
 849         loopback_scope = stcb->asoc.scope.loopback_scope;
 850 #if defined(INET)
 851         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
 852         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
 853 #endif
 854 #if defined(INET6)
 855         local_scope = stcb->asoc.scope.local_scope;
 856         site_scope = stcb->asoc.scope.site_scope;
 857         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
 858 #endif
 859
 860         SCTP_IPI_ADDR_RLOCK();
 861         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
 862         if (vrf == NULL) {
 863                 /* no vrf, no addresses */
 864                 SCTP_IPI_ADDR_RUNLOCK();
 865                 return (0);
 866         }
 867
 868         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 869                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 870                         if ((loopback_scope == 0) &&
 871                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 872                                 continue;
 873                         }
 874                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 875                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
 876                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
 877                                         /*
 878                                          * We allow pending addresses, where
 879                                          * we have sent an asconf-add to be
 880                                          * considered valid.
 881                                          */
 882                                         continue;
 883                                 }
 884                                 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
 885                                         continue;
 886                                 }
 887                                 switch (sctp_ifa->address.sa.sa_family) {
 888 #ifdef INET
 889                                 case AF_INET:
 890                                         if (ipv4_addr_legal) {
 891                                                 struct sockaddr_in *sin,
 892                                                            *rsin;
 893
 894                                                 sin = &sctp_ifa->address.sin;
 895                                                 rsin = (struct sockaddr_in *)to;
 896                                                 if ((ipv4_local_scope == 0) &&
 897                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 898                                                         continue;
 899                                                 }
 900                                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
 901                                                     &sin->sin_addr) != 0) {
 902                                                         continue;
 903                                                 }
 904                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 905                                                         SCTP_IPI_ADDR_RUNLOCK();
 906                                                         return (1);
 907                                                 }
 908                                         }
 909                                         break;
 910 #endif
 911 #ifdef INET6
 912                                 case AF_INET6:
 913                                         if (ipv6_addr_legal) {
 914                                                 struct sockaddr_in6 *sin6,
 915                                                             *rsin6;
 916
 917                                                 sin6 = &sctp_ifa->address.sin6;
 918                                                 rsin6 = (struct sockaddr_in6 *)to;
 919                                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
 920                                                     &sin6->sin6_addr) != 0) {
 921                                                         continue;
 922                                                 }
 923                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 924                                                         if (local_scope == 0)
 925                                                                 continue;
 926                                                         if (sin6->sin6_scope_id == 0) {
 927                                                                 if (sa6_recoverscope(sin6) != 0)
 928                                                                         continue;
 929                                                         }
 930                                                 }
 931                                                 if ((site_scope == 0) &&
 932                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
 933                                                         continue;
 934                                                 }
 935                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 936                                                         SCTP_IPI_ADDR_RUNLOCK();
 937                                                         return (1);
 938                                                 }
 939                                         }
 940                                         break;
 941 #endif
 942                                 default:
 943                                         /* TSNH */
 944                                         break;
 945                                 }
 946                         }
 947                 }
 948         } else {
 949                 struct sctp_laddr *laddr;
 950
 951                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
 952                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 953                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 954                                 continue;
 955                         }
 956                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
 957                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
 958                                 /*
 959                                  * We allow pending addresses, where we have
 960                                  * sent an asconf-add to be considered
 961                                  * valid.
 962                                  */
 963                                 continue;
 964                         }
 965                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
 966                                 continue;
 967                         }
 968                         switch (to->sa_family) {
 969 #ifdef INET
 970                         case AF_INET:
 971                                 {
 972                                         struct sockaddr_in *sin, *rsin;
 973
 974                                         sin = &laddr->ifa->address.sin;
 975                                         rsin = (struct sockaddr_in *)to;
 976                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 977                                                 SCTP_IPI_ADDR_RUNLOCK();
 978                                                 return (1);
 979                                         }
 980                                         break;
 981                                 }
 982 #endif
 983 #ifdef INET6
 984                         case AF_INET6:
 985                                 {
 986                                         struct sockaddr_in6 *sin6, *rsin6;
 987
 988                                         sin6 = &laddr->ifa->address.sin6;
 989                                         rsin6 = (struct sockaddr_in6 *)to;
 990                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 991                                                 SCTP_IPI_ADDR_RUNLOCK();
 992                                                 return (1);
 993                                         }
 994                                         break;
 995                                 }
 996
 997 #endif
 998                         default:
 999                                 /* TSNH */
1000                                 break;
1001                         }
1002
1003                 }
1004         }
1005         SCTP_IPI_ADDR_RUNLOCK();
1006         return (0);
1007 }
1008
1009
1010 static struct sctp_tcb *
1011 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1012     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1013 {
1014         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1015         /*
1016          * If we support the TCP model, then we must now dig through to see
1017          * if we can find our endpoint in the list of tcp ep's.
1018          */
1019         uint16_t lport, rport;
1020         struct sctppcbhead *ephead;
1021         struct sctp_inpcb *inp;
1022         struct sctp_laddr *laddr;
1023         struct sctp_tcb *stcb;
1024         struct sctp_nets *net;
1025
1026         if ((to == NULL) || (from == NULL)) {
1027                 return (NULL);
1028         }
1029
1030         switch (to->sa_family) {
1031 #ifdef INET
1032         case AF_INET:
1033                 if (from->sa_family == AF_INET) {
1034                         lport = ((struct sockaddr_in *)to)->sin_port;
1035                         rport = ((struct sockaddr_in *)from)->sin_port;
1036                 } else {
1037                         return (NULL);
1038                 }
1039                 break;
1040 #endif
1041 #ifdef INET6
1042         case AF_INET6:
1043                 if (from->sa_family == AF_INET6) {
1044                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
1045                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
1046                 } else {
1047                         return (NULL);
1048                 }
1049                 break;
1050 #endif
1051         default:
1052                 return (NULL);
1053         }
1054         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1055         /*
1056          * Ok now for each of the guys in this bucket we must look and see:
1057          * - Does the remote port match. - Does there single association's
1058          * addresses match this address (to). If so we update p_ep to point
1059          * to this ep and return the tcb from it.
1060          */
1061         LIST_FOREACH(inp, ephead, sctp_hash) {
1062                 SCTP_INP_RLOCK(inp);
1063                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1064                         SCTP_INP_RUNLOCK(inp);
1065                         continue;
1066                 }
1067                 if (lport != inp->sctp_lport) {
1068                         SCTP_INP_RUNLOCK(inp);
1069                         continue;
1070                 }
1071                 switch (to->sa_family) {
1072 #ifdef INET
1073                 case AF_INET:
1074                         {
1075                                 struct sockaddr_in *sin;
1076
1077                                 sin = (struct sockaddr_in *)to;
1078                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1079                                     &sin->sin_addr) != 0) {
1080                                         SCTP_INP_RUNLOCK(inp);
1081                                         continue;
1082                                 }
1083                                 break;
1084                         }
1085 #endif
1086 #ifdef INET6
1087                 case AF_INET6:
1088                         {
1089                                 struct sockaddr_in6 *sin6;
1090
1091                                 sin6 = (struct sockaddr_in6 *)to;
1092                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1093                                     &sin6->sin6_addr) != 0) {
1094                                         SCTP_INP_RUNLOCK(inp);
1095                                         continue;
1096                                 }
1097                                 break;
1098                         }
1099 #endif
1100                 default:
1101                         SCTP_INP_RUNLOCK(inp);
1102                         continue;
1103                 }
1104                 if (inp->def_vrf_id != vrf_id) {
1105                         SCTP_INP_RUNLOCK(inp);
1106                         continue;
1107                 }
1108                 /* check to see if the ep has one of the addresses */
1109                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1110                         /* We are NOT bound all, so look further */
1111                         int match = 0;
1112
1113                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1114
1115                                 if (laddr->ifa == NULL) {
1116                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__);
1117                                         continue;
1118                                 }
1119                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1120                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1121                                         continue;
1122                                 }
1123                                 if (laddr->ifa->address.sa.sa_family ==
1124                                     to->sa_family) {
1125                                         /* see if it matches */
1126 #ifdef INET
1127                                         if (from->sa_family == AF_INET) {
1128                                                 struct sockaddr_in *intf_addr,
1129                                                            *sin;
1130
1131                                                 intf_addr = &laddr->ifa->address.sin;
1132                                                 sin = (struct sockaddr_in *)to;
1133                                                 if (sin->sin_addr.s_addr ==
1134                                                     intf_addr->sin_addr.s_addr) {
1135                                                         match = 1;
1136                                                         break;
1137                                                 }
1138                                         }
1139 #endif
1140 #ifdef INET6
1141                                         if (from->sa_family == AF_INET6) {
1142                                                 struct sockaddr_in6 *intf_addr6;
1143                                                 struct sockaddr_in6 *sin6;
1144
1145                                                 sin6 = (struct sockaddr_in6 *)
1146                                                     to;
1147                                                 intf_addr6 = &laddr->ifa->address.sin6;
1148
1149                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1150                                                     intf_addr6)) {
1151                                                         match = 1;
1152                                                         break;
1153                                                 }
1154                                         }
1155 #endif
1156                                 }
1157                         }
1158                         if (match == 0) {
1159                                 /* This endpoint does not have this address */
1160                                 SCTP_INP_RUNLOCK(inp);
1161                                 continue;
1162                         }
1163                 }
1164                 /*
1165                  * Ok if we hit here the ep has the address, does it hold
1166                  * the tcb?
1167                  */
1168                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1169                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1170                 if (stcb == NULL) {
1171                         SCTP_INP_RUNLOCK(inp);
1172                         continue;
1173                 }
1174                 SCTP_TCB_LOCK(stcb);
1175                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1176                         SCTP_TCB_UNLOCK(stcb);
1177                         SCTP_INP_RUNLOCK(inp);
1178                         continue;
1179                 }
1180                 if (stcb->rport != rport) {
1181                         /* remote port does not match. */
1182                         SCTP_TCB_UNLOCK(stcb);
1183                         SCTP_INP_RUNLOCK(inp);
1184                         continue;
1185                 }
1186                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1187                         SCTP_TCB_UNLOCK(stcb);
1188                         SCTP_INP_RUNLOCK(inp);
1189                         continue;
1190                 }
1191                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1192                         SCTP_TCB_UNLOCK(stcb);
1193                         SCTP_INP_RUNLOCK(inp);
1194                         continue;
1195                 }
1196                 /* Does this TCB have a matching address? */
1197                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1198
1199                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1200                                 /* not the same family, can't be a match */
1201                                 continue;
1202                         }
1203                         switch (from->sa_family) {
1204 #ifdef INET
1205                         case AF_INET:
1206                                 {
1207                                         struct sockaddr_in *sin, *rsin;
1208
1209                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
1210                                         rsin = (struct sockaddr_in *)from;
1211                                         if (sin->sin_addr.s_addr ==
1212                                             rsin->sin_addr.s_addr) {
1213                                                 /* found it */
1214                                                 if (netp != NULL) {
1215                                                         *netp = net;
1216                                                 }
1217                                                 /*
1218                                                  * Update the endpoint
1219                                                  * pointer
1220                                                  */
1221                                                 *inp_p = inp;
1222                                                 SCTP_INP_RUNLOCK(inp);
1223                                                 return (stcb);
1224                                         }
1225                                         break;
1226                                 }
1227 #endif
1228 #ifdef INET6
1229                         case AF_INET6:
1230                                 {
1231                                         struct sockaddr_in6 *sin6, *rsin6;
1232
1233                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1234                                         rsin6 = (struct sockaddr_in6 *)from;
1235                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1236                                             rsin6)) {
1237                                                 /* found it */
1238                                                 if (netp != NULL) {
1239                                                         *netp = net;
1240                                                 }
1241                                                 /*
1242                                                  * Update the endpoint
1243                                                  * pointer
1244                                                  */
1245                                                 *inp_p = inp;
1246                                                 SCTP_INP_RUNLOCK(inp);
1247                                                 return (stcb);
1248                                         }
1249                                         break;
1250                                 }
1251 #endif
1252                         default:
1253                                 /* TSNH */
1254                                 break;
1255                         }
1256                 }
1257                 SCTP_TCB_UNLOCK(stcb);
1258                 SCTP_INP_RUNLOCK(inp);
1259         }
1260         return (NULL);
1261 }
1262
1263
1264 /*
1265  * rules for use
1266  *
1267  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1268  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1269  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1270  * NULL.
1271  */
1272
1273 struct sctp_tcb *
1274 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1275     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1276 {
1277         struct sctpasochead *head;
1278         struct sctp_inpcb *inp;
1279         struct sctp_tcb *stcb = NULL;
1280         struct sctp_nets *net;
1281         uint16_t rport;
1282
1283         inp = *inp_p;
1284         switch (remote->sa_family) {
1285 #ifdef INET
1286         case AF_INET:
1287                 rport = (((struct sockaddr_in *)remote)->sin_port);
1288                 break;
1289 #endif
1290 #ifdef INET6
1291         case AF_INET6:
1292                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1293                 break;
1294 #endif
1295         default:
1296                 return (NULL);
1297         }
1298         if (locked_tcb) {
1299                 /*
1300                  * UN-lock so we can do proper locking here this occurs when
1301                  * called from load_addresses_from_init.
1302                  */
1303                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1304                 SCTP_TCB_UNLOCK(locked_tcb);
1305         }
1306         SCTP_INP_INFO_RLOCK();
1307         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1308             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1309                 /*-
1310                  * Now either this guy is our listener or it's the
1311                  * connector. If it is the one that issued the connect, then
1312                  * it's only chance is to be the first TCB in the list. If
1313                  * it is the acceptor, then do the special_lookup to hash
1314                  * and find the real inp.
1315                  */
1316                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1317                         /* to is peer addr, from is my addr */
1318                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1319                             netp, inp->def_vrf_id);
1320                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1321                                 /* we have a locked tcb, lower refcount */
1322                                 SCTP_INP_DECR_REF(inp);
1323                         }
1324                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1325                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1326                                 SCTP_TCB_LOCK(locked_tcb);
1327                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1328                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1329                         }
1330                         SCTP_INP_INFO_RUNLOCK();
1331                         return (stcb);
1332                 } else {
1333                         SCTP_INP_WLOCK(inp);
1334                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1335                                 goto null_return;
1336                         }
1337                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1338                         if (stcb == NULL) {
1339                                 goto null_return;
1340                         }
1341                         SCTP_TCB_LOCK(stcb);
1342
1343                         if (stcb->rport != rport) {
1344                                 /* remote port does not match. */
1345                                 SCTP_TCB_UNLOCK(stcb);
1346                                 goto null_return;
1347                         }
1348                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1349                                 SCTP_TCB_UNLOCK(stcb);
1350                                 goto null_return;
1351                         }
1352                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1353                                 SCTP_TCB_UNLOCK(stcb);
1354                                 goto null_return;
1355                         }
1356                         /* now look at the list of remote addresses */
1357                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1358 #ifdef INVARIANTS
1359                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1360                                         panic("Corrupt net list");
1361                                 }
1362 #endif
1363                                 if (net->ro._l_addr.sa.sa_family !=
1364                                     remote->sa_family) {
1365                                         /* not the same family */
1366                                         continue;
1367                                 }
1368                                 switch (remote->sa_family) {
1369 #ifdef INET
1370                                 case AF_INET:
1371                                         {
1372                                                 struct sockaddr_in *sin,
1373                                                            *rsin;
1374
1375                                                 sin = (struct sockaddr_in *)
1376                                                     &net->ro._l_addr;
1377                                                 rsin = (struct sockaddr_in *)remote;
1378                                                 if (sin->sin_addr.s_addr ==
1379                                                     rsin->sin_addr.s_addr) {
1380                                                         /* found it */
1381                                                         if (netp != NULL) {
1382                                                                 *netp = net;
1383                                                         }
1384                                                         if (locked_tcb == NULL) {
1385                                                                 SCTP_INP_DECR_REF(inp);
1386                                                         } else if (locked_tcb != stcb) {
1387                                                                 SCTP_TCB_LOCK(locked_tcb);
1388                                                         }
1389                                                         if (locked_tcb) {
1390                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1391                                                         }
1392
1393                                                         SCTP_INP_WUNLOCK(inp);
1394                                                         SCTP_INP_INFO_RUNLOCK();
1395                                                         return (stcb);
1396                                                 }
1397                                                 break;
1398                                         }
1399 #endif
1400 #ifdef INET6
1401                                 case AF_INET6:
1402                                         {
1403                                                 struct sockaddr_in6 *sin6,
1404                                                             *rsin6;
1405
1406                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1407                                                 rsin6 = (struct sockaddr_in6 *)remote;
1408                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1409                                                     rsin6)) {
1410                                                         /* found it */
1411                                                         if (netp != NULL) {
1412                                                                 *netp = net;
1413                                                         }
1414                                                         if (locked_tcb == NULL) {
1415                                                                 SCTP_INP_DECR_REF(inp);
1416                                                         } else if (locked_tcb != stcb) {
1417                                                                 SCTP_TCB_LOCK(locked_tcb);
1418                                                         }
1419                                                         if (locked_tcb) {
1420                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1421                                                         }
1422                                                         SCTP_INP_WUNLOCK(inp);
1423                                                         SCTP_INP_INFO_RUNLOCK();
1424                                                         return (stcb);
1425                                                 }
1426                                                 break;
1427                                         }
1428 #endif
1429                                 default:
1430                                         /* TSNH */
1431                                         break;
1432                                 }
1433                         }
1434                         SCTP_TCB_UNLOCK(stcb);
1435                 }
1436         } else {
1437                 SCTP_INP_WLOCK(inp);
1438                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1439                         goto null_return;
1440                 }
1441                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1442                     inp->sctp_hashmark)];
1443                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1444                         if (stcb->rport != rport) {
1445                                 /* remote port does not match */
1446                                 continue;
1447                         }
1448                         SCTP_TCB_LOCK(stcb);
1449                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1450                                 SCTP_TCB_UNLOCK(stcb);
1451                                 continue;
1452                         }
1453                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1454                                 SCTP_TCB_UNLOCK(stcb);
1455                                 continue;
1456                         }
1457                         /* now look at the list of remote addresses */
1458                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1459 #ifdef INVARIANTS
1460                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1461                                         panic("Corrupt net list");
1462                                 }
1463 #endif
1464                                 if (net->ro._l_addr.sa.sa_family !=
1465                                     remote->sa_family) {
1466                                         /* not the same family */
1467                                         continue;
1468                                 }
1469                                 switch (remote->sa_family) {
1470 #ifdef INET
1471                                 case AF_INET:
1472                                         {
1473                                                 struct sockaddr_in *sin,
1474                                                            *rsin;
1475
1476                                                 sin = (struct sockaddr_in *)
1477                                                     &net->ro._l_addr;
1478                                                 rsin = (struct sockaddr_in *)remote;
1479                                                 if (sin->sin_addr.s_addr ==
1480                                                     rsin->sin_addr.s_addr) {
1481                                                         /* found it */
1482                                                         if (netp != NULL) {
1483                                                                 *netp = net;
1484                                                         }
1485                                                         if (locked_tcb == NULL) {
1486                                                                 SCTP_INP_DECR_REF(inp);
1487                                                         } else if (locked_tcb != stcb) {
1488                                                                 SCTP_TCB_LOCK(locked_tcb);
1489                                                         }
1490                                                         if (locked_tcb) {
1491                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1492                                                         }
1493                                                         SCTP_INP_WUNLOCK(inp);
1494                                                         SCTP_INP_INFO_RUNLOCK();
1495                                                         return (stcb);
1496                                                 }
1497                                                 break;
1498                                         }
1499 #endif
1500 #ifdef INET6
1501                                 case AF_INET6:
1502                                         {
1503                                                 struct sockaddr_in6 *sin6,
1504                                                             *rsin6;
1505
1506                                                 sin6 = (struct sockaddr_in6 *)
1507                                                     &net->ro._l_addr;
1508                                                 rsin6 = (struct sockaddr_in6 *)remote;
1509                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1510                                                     rsin6)) {
1511                                                         /* found it */
1512                                                         if (netp != NULL) {
1513                                                                 *netp = net;
1514                                                         }
1515                                                         if (locked_tcb == NULL) {
1516                                                                 SCTP_INP_DECR_REF(inp);
1517                                                         } else if (locked_tcb != stcb) {
1518                                                                 SCTP_TCB_LOCK(locked_tcb);
1519                                                         }
1520                                                         if (locked_tcb) {
1521                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1522                                                         }
1523                                                         SCTP_INP_WUNLOCK(inp);
1524                                                         SCTP_INP_INFO_RUNLOCK();
1525                                                         return (stcb);
1526                                                 }
1527                                                 break;
1528                                         }
1529 #endif
1530                                 default:
1531                                         /* TSNH */
1532                                         break;
1533                                 }
1534                         }
1535                         SCTP_TCB_UNLOCK(stcb);
1536                 }
1537         }
1538 null_return:
1539         /* clean up for returning null */
1540         if (locked_tcb) {
1541                 SCTP_TCB_LOCK(locked_tcb);
1542                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1543         }
1544         SCTP_INP_WUNLOCK(inp);
1545         SCTP_INP_INFO_RUNLOCK();
1546         /* not found */
1547         return (NULL);
1548 }
1549
1550
1551 /*
1552  * Find an association for a specific endpoint using the association id given
1553  * out in the COMM_UP notification
1554  */
1555 struct sctp_tcb *
1556 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1557 {
1558         /*
1559          * Use my the assoc_id to find a endpoint
1560          */
1561         struct sctpasochead *head;
1562         struct sctp_tcb *stcb;
1563         uint32_t id;
1564
1565         if (inp == NULL) {
1566                 SCTP_PRINTF("TSNH ep_associd\n");
1567                 return (NULL);
1568         }
1569         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1570                 SCTP_PRINTF("TSNH ep_associd0\n");
1571                 return (NULL);
1572         }
1573         id = (uint32_t)asoc_id;
1574         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1575         if (head == NULL) {
1576                 /* invalid id TSNH */
1577                 SCTP_PRINTF("TSNH ep_associd1\n");
1578                 return (NULL);
1579         }
1580         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1581                 if (stcb->asoc.assoc_id == id) {
1582                         if (inp != stcb->sctp_ep) {
1583                                 /*
1584                                  * some other guy has the same id active (id
1585                                  * collision ??).
1586                                  */
1587                                 SCTP_PRINTF("TSNH ep_associd2\n");
1588                                 continue;
1589                         }
1590                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1591                                 continue;
1592                         }
1593                         if (want_lock) {
1594                                 SCTP_TCB_LOCK(stcb);
1595                         }
1596                         return (stcb);
1597                 }
1598         }
1599         return (NULL);
1600 }
1601
1602
1603 struct sctp_tcb *
1604 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1605 {
1606         struct sctp_tcb *stcb;
1607
1608         SCTP_INP_RLOCK(inp);
1609         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1610         SCTP_INP_RUNLOCK(inp);
1611         return (stcb);
1612 }
1613
1614
1615 /*
1616  * Endpoint probe expects that the INP_INFO is locked.
1617  */
1618 static struct sctp_inpcb *
1619 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1620     uint16_t lport, uint32_t vrf_id)
1621 {
1622         struct sctp_inpcb *inp;
1623         struct sctp_laddr *laddr;
1624 #ifdef INET
1625         struct sockaddr_in *sin;
1626 #endif
1627 #ifdef INET6
1628         struct sockaddr_in6 *sin6;
1629         struct sockaddr_in6 *intf_addr6;
1630 #endif
1631         int fnd;
1632
1633 #ifdef INET
1634         sin = NULL;
1635 #endif
1636 #ifdef INET6
1637         sin6 = NULL;
1638 #endif
1639         switch (nam->sa_family) {
1640 #ifdef INET
1641         case AF_INET:
1642                 sin = (struct sockaddr_in *)nam;
1643                 break;
1644 #endif
1645 #ifdef INET6
1646         case AF_INET6:
1647                 sin6 = (struct sockaddr_in6 *)nam;
1648                 break;
1649 #endif
1650         default:
1651                 /* unsupported family */
1652                 return (NULL);
1653         }
1654
1655         if (head == NULL)
1656                 return (NULL);
1657
1658         LIST_FOREACH(inp, head, sctp_hash) {
1659                 SCTP_INP_RLOCK(inp);
1660                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1661                         SCTP_INP_RUNLOCK(inp);
1662                         continue;
1663                 }
1664                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1665                     (inp->sctp_lport == lport)) {
1666                         /* got it */
1667                         switch (nam->sa_family) {
1668 #ifdef INET
1669                         case AF_INET:
1670                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1671                                     SCTP_IPV6_V6ONLY(inp)) {
1672                                         /*
1673                                          * IPv4 on a IPv6 socket with ONLY
1674                                          * IPv6 set
1675                                          */
1676                                         SCTP_INP_RUNLOCK(inp);
1677                                         continue;
1678                                 }
1679                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1680                                     &sin->sin_addr) != 0) {
1681                                         SCTP_INP_RUNLOCK(inp);
1682                                         continue;
1683                                 }
1684                                 break;
1685 #endif
1686 #ifdef INET6
1687                         case AF_INET6:
1688                                 /*
1689                                  * A V6 address and the endpoint is NOT
1690                                  * bound V6
1691                                  */
1692                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1693                                         SCTP_INP_RUNLOCK(inp);
1694                                         continue;
1695                                 }
1696                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1697                                     &sin6->sin6_addr) != 0) {
1698                                         SCTP_INP_RUNLOCK(inp);
1699                                         continue;
1700                                 }
1701                                 break;
1702 #endif
1703                         default:
1704                                 break;
1705                         }
1706                         /* does a VRF id match? */
1707                         fnd = 0;
1708                         if (inp->def_vrf_id == vrf_id)
1709                                 fnd = 1;
1710
1711                         SCTP_INP_RUNLOCK(inp);
1712                         if (!fnd)
1713                                 continue;
1714                         return (inp);
1715                 }
1716                 SCTP_INP_RUNLOCK(inp);
1717         }
1718         switch (nam->sa_family) {
1719 #ifdef INET
1720         case AF_INET:
1721                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1722                         /* Can't hunt for one that has no address specified */
1723                         return (NULL);
1724                 }
1725                 break;
1726 #endif
1727 #ifdef INET6
1728         case AF_INET6:
1729                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1730                         /* Can't hunt for one that has no address specified */
1731                         return (NULL);
1732                 }
1733                 break;
1734 #endif
1735         default:
1736                 break;
1737         }
1738         /*
1739          * ok, not bound to all so see if we can find a EP bound to this
1740          * address.
1741          */
1742         LIST_FOREACH(inp, head, sctp_hash) {
1743                 SCTP_INP_RLOCK(inp);
1744                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1745                         SCTP_INP_RUNLOCK(inp);
1746                         continue;
1747                 }
1748                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1749                         SCTP_INP_RUNLOCK(inp);
1750                         continue;
1751                 }
1752                 /*
1753                  * Ok this could be a likely candidate, look at all of its
1754                  * addresses
1755                  */
1756                 if (inp->sctp_lport != lport) {
1757                         SCTP_INP_RUNLOCK(inp);
1758                         continue;
1759                 }
1760                 /* does a VRF id match? */
1761                 fnd = 0;
1762                 if (inp->def_vrf_id == vrf_id)
1763                         fnd = 1;
1764
1765                 if (!fnd) {
1766                         SCTP_INP_RUNLOCK(inp);
1767                         continue;
1768                 }
1769                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1770                         if (laddr->ifa == NULL) {
1771                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1772                                     __func__);
1773                                 continue;
1774                         }
1775                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1776                             (void *)laddr->ifa);
1777                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1778                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1779                                 continue;
1780                         }
1781                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1782                                 /* possible, see if it matches */
1783                                 switch (nam->sa_family) {
1784 #ifdef INET
1785                                 case AF_INET:
1786                                         if (sin->sin_addr.s_addr ==
1787                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1788                                                 SCTP_INP_RUNLOCK(inp);
1789                                                 return (inp);
1790                                         }
1791                                         break;
1792 #endif
1793 #ifdef INET6
1794                                 case AF_INET6:
1795                                         intf_addr6 = &laddr->ifa->address.sin6;
1796                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1797                                             intf_addr6)) {
1798                                                 SCTP_INP_RUNLOCK(inp);
1799                                                 return (inp);
1800                                         }
1801                                         break;
1802 #endif
1803                                 }
1804                         }
1805                 }
1806                 SCTP_INP_RUNLOCK(inp);
1807         }
1808         return (NULL);
1809 }
1810
1811
1812 static struct sctp_inpcb *
1813 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1814 {
1815         struct sctppcbhead *head;
1816         struct sctp_inpcb *t_inp;
1817         int fnd;
1818
1819         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1820             SCTP_BASE_INFO(hashmark))];
1821         LIST_FOREACH(t_inp, head, sctp_hash) {
1822                 if (t_inp->sctp_lport != lport) {
1823                         continue;
1824                 }
1825                 /* is it in the VRF in question */
1826                 fnd = 0;
1827                 if (t_inp->def_vrf_id == vrf_id)
1828                         fnd = 1;
1829                 if (!fnd)
1830                         continue;
1831
1832                 /* This one is in use. */
1833                 /* check the v6/v4 binding issue */
1834                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1835                     SCTP_IPV6_V6ONLY(t_inp)) {
1836                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1837                                 /* collision in V6 space */
1838                                 return (t_inp);
1839                         } else {
1840                                 /* inp is BOUND_V4 no conflict */
1841                                 continue;
1842                         }
1843                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1844                         /* t_inp is bound v4 and v6, conflict always */
1845                         return (t_inp);
1846                 } else {
1847                         /* t_inp is bound only V4 */
1848                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1849                             SCTP_IPV6_V6ONLY(inp)) {
1850                                 /* no conflict */
1851                                 continue;
1852                         }
1853                         /* else fall through to conflict */
1854                 }
1855                 return (t_inp);
1856         }
1857         return (NULL);
1858 }
1859
1860
1861 int
1862 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1863 {
1864         /* For 1-2-1 with port reuse */
1865         struct sctppcbhead *head;
1866         struct sctp_inpcb *tinp, *ninp;
1867
1868         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1869                 /* only works with port reuse on */
1870                 return (-1);
1871         }
1872         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1873                 return (0);
1874         }
1875         SCTP_INP_RUNLOCK(inp);
1876         SCTP_INP_INFO_WLOCK();
1877         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1878             SCTP_BASE_INFO(hashmark))];
1879         /* Kick out all non-listeners to the TCP hash */
1880         LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1881                 if (tinp->sctp_lport != inp->sctp_lport) {
1882                         continue;
1883                 }
1884                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1885                         continue;
1886                 }
1887                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1888                         continue;
1889                 }
1890                 if (tinp->sctp_socket->so_qlimit) {
1891                         continue;
1892                 }
1893                 SCTP_INP_WLOCK(tinp);
1894                 LIST_REMOVE(tinp, sctp_hash);
1895                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1896                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1897                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1898                 SCTP_INP_WUNLOCK(tinp);
1899         }
1900         SCTP_INP_WLOCK(inp);
1901         /* Pull from where he was */
1902         LIST_REMOVE(inp, sctp_hash);
1903         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1904         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1905         LIST_INSERT_HEAD(head, inp, sctp_hash);
1906         SCTP_INP_WUNLOCK(inp);
1907         SCTP_INP_RLOCK(inp);
1908         SCTP_INP_INFO_WUNLOCK();
1909         return (0);
1910 }
1911
1912
1913 struct sctp_inpcb *
1914 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1915     uint32_t vrf_id)
1916 {
1917         /*
1918          * First we check the hash table to see if someone has this port
1919          * bound with just the port.
1920          */
1921         struct sctp_inpcb *inp;
1922         struct sctppcbhead *head;
1923         int lport;
1924         unsigned int i;
1925 #ifdef INET
1926         struct sockaddr_in *sin;
1927 #endif
1928 #ifdef INET6
1929         struct sockaddr_in6 *sin6;
1930 #endif
1931
1932         switch (nam->sa_family) {
1933 #ifdef INET
1934         case AF_INET:
1935                 sin = (struct sockaddr_in *)nam;
1936                 lport = sin->sin_port;
1937                 break;
1938 #endif
1939 #ifdef INET6
1940         case AF_INET6:
1941                 sin6 = (struct sockaddr_in6 *)nam;
1942                 lport = sin6->sin6_port;
1943                 break;
1944 #endif
1945         default:
1946                 return (NULL);
1947         }
1948         /*
1949          * I could cheat here and just cast to one of the types but we will
1950          * do it right. It also provides the check against an Unsupported
1951          * type too.
1952          */
1953         /* Find the head of the ALLADDR chain */
1954         if (have_lock == 0) {
1955                 SCTP_INP_INFO_RLOCK();
1956         }
1957         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1958             SCTP_BASE_INFO(hashmark))];
1959         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1960
1961         /*
1962          * If the TCP model exists it could be that the main listening
1963          * endpoint is gone but there still exists a connected socket for
1964          * this guy. If so we can return the first one that we find. This
1965          * may NOT be the correct one so the caller should be wary on the
1966          * returned INP. Currently the only caller that sets find_tcp_pool
1967          * is in bindx where we are verifying that a user CAN bind the
1968          * address. He either has bound it already, or someone else has, or
1969          * its open to bind, so this is good enough.
1970          */
1971         if (inp == NULL && find_tcp_pool) {
1972                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1973                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1974                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1975                         if (inp) {
1976                                 break;
1977                         }
1978                 }
1979         }
1980         if (inp) {
1981                 SCTP_INP_INCR_REF(inp);
1982         }
1983         if (have_lock == 0) {
1984                 SCTP_INP_INFO_RUNLOCK();
1985         }
1986         return (inp);
1987 }
1988
1989
1990 /*
1991  * Find an association for an endpoint with the pointer to whom you want to
1992  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1993  * need to change the *to to some other struct like a mbuf...
1994  */
1995 struct sctp_tcb *
1996 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
1997     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1998     uint32_t vrf_id)
1999 {
2000         struct sctp_inpcb *inp = NULL;
2001         struct sctp_tcb *stcb;
2002
2003         SCTP_INP_INFO_RLOCK();
2004         if (find_tcp_pool) {
2005                 if (inp_p != NULL) {
2006                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2007                             vrf_id);
2008                 } else {
2009                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2010                             vrf_id);
2011                 }
2012                 if (stcb != NULL) {
2013                         SCTP_INP_INFO_RUNLOCK();
2014                         return (stcb);
2015                 }
2016         }
2017         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2018         if (inp_p != NULL) {
2019                 *inp_p = inp;
2020         }
2021         SCTP_INP_INFO_RUNLOCK();
2022         if (inp == NULL) {
2023                 return (NULL);
2024         }
2025         /*
2026          * ok, we have an endpoint, now lets find the assoc for it (if any)
2027          * we now place the source address or from in the to of the find
2028          * endpoint call. Since in reality this chain is used from the
2029          * inbound packet side.
2030          */
2031         if (inp_p != NULL) {
2032                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2033                     NULL);
2034         } else {
2035                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2036                     NULL);
2037         }
2038         return (stcb);
2039 }
2040
2041
2042 /*
2043  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2044  * find all addresses that the sender has specified in any address list. Each
2045  * address will be used to lookup the TCB and see if one exits.
2046  */
2047 static struct sctp_tcb *
2048 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2049     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2050     struct sockaddr *dst)
2051 {
2052         struct sctp_paramhdr *phdr, param_buf;
2053 #if defined(INET) || defined(INET6)
2054         struct sctp_tcb *stcb;
2055         uint16_t ptype;
2056 #endif
2057         uint16_t plen;
2058 #ifdef INET
2059         struct sockaddr_in sin4;
2060 #endif
2061 #ifdef INET6
2062         struct sockaddr_in6 sin6;
2063 #endif
2064
2065 #ifdef INET
2066         memset(&sin4, 0, sizeof(sin4));
2067         sin4.sin_len = sizeof(sin4);
2068         sin4.sin_family = AF_INET;
2069         sin4.sin_port = sh->src_port;
2070 #endif
2071 #ifdef INET6
2072         memset(&sin6, 0, sizeof(sin6));
2073         sin6.sin6_len = sizeof(sin6);
2074         sin6.sin6_family = AF_INET6;
2075         sin6.sin6_port = sh->src_port;
2076 #endif
2077
2078         offset += sizeof(struct sctp_init_chunk);
2079
2080         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
2081         while (phdr != NULL) {
2082                 /* now we must see if we want the parameter */
2083 #if defined(INET) || defined(INET6)
2084                 ptype = ntohs(phdr->param_type);
2085 #endif
2086                 plen = ntohs(phdr->param_length);
2087                 if (plen == 0) {
2088                         break;
2089                 }
2090 #ifdef INET
2091                 if (ptype == SCTP_IPV4_ADDRESS &&
2092                     plen == sizeof(struct sctp_ipv4addr_param)) {
2093                         /* Get the rest of the address */
2094                         struct sctp_ipv4addr_param ip4_param, *p4;
2095
2096                         phdr = sctp_get_next_param(m, offset,
2097                             (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param));
2098                         if (phdr == NULL) {
2099                                 return (NULL);
2100                         }
2101                         p4 = (struct sctp_ipv4addr_param *)phdr;
2102                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2103                         /* look it up */
2104                         stcb = sctp_findassociation_ep_addr(inp_p,
2105                             (struct sockaddr *)&sin4, netp, dst, NULL);
2106                         if (stcb != NULL) {
2107                                 return (stcb);
2108                         }
2109                 }
2110 #endif
2111 #ifdef INET6
2112                 if (ptype == SCTP_IPV6_ADDRESS &&
2113                     plen == sizeof(struct sctp_ipv6addr_param)) {
2114                         /* Get the rest of the address */
2115                         struct sctp_ipv6addr_param ip6_param, *p6;
2116
2117                         phdr = sctp_get_next_param(m, offset,
2118                             (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param));
2119                         if (phdr == NULL) {
2120                                 return (NULL);
2121                         }
2122                         p6 = (struct sctp_ipv6addr_param *)phdr;
2123                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2124                         /* look it up */
2125                         stcb = sctp_findassociation_ep_addr(inp_p,
2126                             (struct sockaddr *)&sin6, netp, dst, NULL);
2127                         if (stcb != NULL) {
2128                                 return (stcb);
2129                         }
2130                 }
2131 #endif
2132                 offset += SCTP_SIZE32(plen);
2133                 phdr = sctp_get_next_param(m, offset, &param_buf,
2134                     sizeof(param_buf));
2135         }
2136         return (NULL);
2137 }
2138
2139 static struct sctp_tcb *
2140 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2141     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2142     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2143 {
2144         /*
2145          * Use my vtag to hash. If we find it we then verify the source addr
2146          * is in the assoc. If all goes well we save a bit on rec of a
2147          * packet.
2148          */
2149         struct sctpasochead *head;
2150         struct sctp_nets *net;
2151         struct sctp_tcb *stcb;
2152
2153         SCTP_INP_INFO_RLOCK();
2154         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2155             SCTP_BASE_INFO(hashasocmark))];
2156         LIST_FOREACH(stcb, head, sctp_asocs) {
2157                 SCTP_INP_RLOCK(stcb->sctp_ep);
2158                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2159                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2160                         continue;
2161                 }
2162                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2163                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2164                         continue;
2165                 }
2166                 SCTP_TCB_LOCK(stcb);
2167                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2168                 if (stcb->asoc.my_vtag == vtag) {
2169                         /* candidate */
2170                         if (stcb->rport != rport) {
2171                                 SCTP_TCB_UNLOCK(stcb);
2172                                 continue;
2173                         }
2174                         if (stcb->sctp_ep->sctp_lport != lport) {
2175                                 SCTP_TCB_UNLOCK(stcb);
2176                                 continue;
2177                         }
2178                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2179                                 SCTP_TCB_UNLOCK(stcb);
2180                                 continue;
2181                         }
2182                         /* RRS:Need toaddr check here */
2183                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2184                                 /* Endpoint does not own this address */
2185                                 SCTP_TCB_UNLOCK(stcb);
2186                                 continue;
2187                         }
2188                         if (remote_tag) {
2189                                 /*
2190                                  * If we have both vtags that's all we match
2191                                  * on
2192                                  */
2193                                 if (stcb->asoc.peer_vtag == remote_tag) {
2194                                         /*
2195                                          * If both tags match we consider it
2196                                          * conclusive and check NO
2197                                          * source/destination addresses
2198                                          */
2199                                         goto conclusive;
2200                                 }
2201                         }
2202                         if (skip_src_check) {
2203                 conclusive:
2204                                 if (from) {
2205                                         *netp = sctp_findnet(stcb, from);
2206                                 } else {
2207                                         *netp = NULL;   /* unknown */
2208                                 }
2209                                 if (inp_p)
2210                                         *inp_p = stcb->sctp_ep;
2211                                 SCTP_INP_INFO_RUNLOCK();
2212                                 return (stcb);
2213                         }
2214                         net = sctp_findnet(stcb, from);
2215                         if (net) {
2216                                 /* yep its him. */
2217                                 *netp = net;
2218                                 SCTP_STAT_INCR(sctps_vtagexpress);
2219                                 *inp_p = stcb->sctp_ep;
2220                                 SCTP_INP_INFO_RUNLOCK();
2221                                 return (stcb);
2222                         } else {
2223                                 /*
2224                                  * not him, this should only happen in rare
2225                                  * cases so I peg it.
2226                                  */
2227                                 SCTP_STAT_INCR(sctps_vtagbogus);
2228                         }
2229                 }
2230                 SCTP_TCB_UNLOCK(stcb);
2231         }
2232         SCTP_INP_INFO_RUNLOCK();
2233         return (NULL);
2234 }
2235
2236
2237 /*
2238  * Find an association with the pointer to the inbound IP packet. This can be
2239  * a IPv4 or IPv6 packet.
2240  */
2241 struct sctp_tcb *
2242 sctp_findassociation_addr(struct mbuf *m, int offset,
2243     struct sockaddr *src, struct sockaddr *dst,
2244     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2245     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2246 {
2247         struct sctp_tcb *stcb;
2248         struct sctp_inpcb *inp;
2249
2250         if (sh->v_tag) {
2251                 /* we only go down this path if vtag is non-zero */
2252                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2253                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2254                 if (stcb) {
2255                         return (stcb);
2256                 }
2257         }
2258
2259         if (inp_p) {
2260                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2261                     1, vrf_id);
2262                 inp = *inp_p;
2263         } else {
2264                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2265                     1, vrf_id);
2266         }
2267         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2268         if (stcb == NULL && inp) {
2269                 /* Found a EP but not this address */
2270                 if ((ch->chunk_type == SCTP_INITIATION) ||
2271                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2272                         /*-
2273                          * special hook, we do NOT return linp or an
2274                          * association that is linked to an existing
2275                          * association that is under the TCP pool (i.e. no
2276                          * listener exists). The endpoint finding routine
2277                          * will always find a listener before examining the
2278                          * TCP pool.
2279                          */
2280                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2281                                 if (inp_p) {
2282                                         *inp_p = NULL;
2283                                 }
2284                                 return (NULL);
2285                         }
2286                         stcb = sctp_findassociation_special_addr(m,
2287                             offset, sh, &inp, netp, dst);
2288                         if (inp_p != NULL) {
2289                                 *inp_p = inp;
2290                         }
2291                 }
2292         }
2293         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2294         return (stcb);
2295 }
2296
2297 /*
2298  * lookup an association by an ASCONF lookup address.
2299  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2300  */
2301 struct sctp_tcb *
2302 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2303     struct sockaddr *dst, struct sctphdr *sh,
2304     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2305 {
2306         struct sctp_tcb *stcb;
2307         union sctp_sockstore remote_store;
2308         struct sctp_paramhdr param_buf, *phdr;
2309         int ptype;
2310         int zero_address = 0;
2311 #ifdef INET
2312         struct sockaddr_in *sin;
2313 #endif
2314 #ifdef INET6
2315         struct sockaddr_in6 *sin6;
2316 #endif
2317
2318         memset(&remote_store, 0, sizeof(remote_store));
2319         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2320             &param_buf, sizeof(struct sctp_paramhdr));
2321         if (phdr == NULL) {
2322                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2323                     __func__);
2324                 return NULL;
2325         }
2326         ptype = (int)((uint32_t)ntohs(phdr->param_type));
2327         /* get the correlation address */
2328         switch (ptype) {
2329 #ifdef INET6
2330         case SCTP_IPV6_ADDRESS:
2331                 {
2332                         /* ipv6 address param */
2333                         struct sctp_ipv6addr_param *p6, p6_buf;
2334
2335                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2336                                 return NULL;
2337                         }
2338                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2339                             offset + sizeof(struct sctp_asconf_chunk),
2340                             &p6_buf.ph, sizeof(p6_buf));
2341                         if (p6 == NULL) {
2342                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2343                                     __func__);
2344                                 return (NULL);
2345                         }
2346                         sin6 = &remote_store.sin6;
2347                         sin6->sin6_family = AF_INET6;
2348                         sin6->sin6_len = sizeof(*sin6);
2349                         sin6->sin6_port = sh->src_port;
2350                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2351                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2352                                 zero_address = 1;
2353                         break;
2354                 }
2355 #endif
2356 #ifdef INET
2357         case SCTP_IPV4_ADDRESS:
2358                 {
2359                         /* ipv4 address param */
2360                         struct sctp_ipv4addr_param *p4, p4_buf;
2361
2362                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2363                                 return NULL;
2364                         }
2365                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2366                             offset + sizeof(struct sctp_asconf_chunk),
2367                             &p4_buf.ph, sizeof(p4_buf));
2368                         if (p4 == NULL) {
2369                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2370                                     __func__);
2371                                 return (NULL);
2372                         }
2373                         sin = &remote_store.sin;
2374                         sin->sin_family = AF_INET;
2375                         sin->sin_len = sizeof(*sin);
2376                         sin->sin_port = sh->src_port;
2377                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2378                         if (sin->sin_addr.s_addr == INADDR_ANY)
2379                                 zero_address = 1;
2380                         break;
2381                 }
2382 #endif
2383         default:
2384                 /* invalid address param type */
2385                 return NULL;
2386         }
2387
2388         if (zero_address) {
2389                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2390                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2391                 if (stcb != NULL) {
2392                         SCTP_INP_DECR_REF(*inp_p);
2393                 }
2394         } else {
2395                 stcb = sctp_findassociation_ep_addr(inp_p,
2396                     &remote_store.sa, netp,
2397                     dst, NULL);
2398         }
2399         return (stcb);
2400 }
2401
2402
2403 /*
2404  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2405  * addresses. This way if we don't get a bind we by default pick a ephemeral
2406  * port with all addresses bound.
2407  */
2408 int
2409 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2410 {
2411         /*
2412          * we get called when a new endpoint starts up. We need to allocate
2413          * the sctp_inpcb structure from the zone and init it. Mark it as
2414          * unbound and find a port that we can use as an ephemeral with
2415          * INADDR_ANY. If the user binds later no problem we can then add in
2416          * the specific addresses. And setup the default parameters for the
2417          * EP.
2418          */
2419         int i, error;
2420         struct sctp_inpcb *inp;
2421         struct sctp_pcb *m;
2422         struct timeval time;
2423         sctp_sharedkey_t *null_key;
2424
2425         error = 0;
2426
2427         SCTP_INP_INFO_WLOCK();
2428         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2429         if (inp == NULL) {
2430                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2431                 SCTP_INP_INFO_WUNLOCK();
2432                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2433                 return (ENOBUFS);
2434         }
2435         /* zap it */
2436         memset(inp, 0, sizeof(*inp));
2437
2438         /* bump generations */
2439         /* setup socket pointers */
2440         inp->sctp_socket = so;
2441         inp->ip_inp.inp.inp_socket = so;
2442         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2443 #ifdef INET6
2444         if (INP_SOCKAF(so) == AF_INET6) {
2445                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2446                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2447                 }
2448                 if (MODULE_GLOBAL(ip6_v6only)) {
2449                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2450                 }
2451         }
2452 #endif
2453         inp->sctp_associd_counter = 1;
2454         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2455         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2456         inp->max_cwnd = 0;
2457         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2458         inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable);
2459         inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable);
2460         inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable);
2461         inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable);
2462         inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2463         inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2464         inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2465         inp->idata_supported = 0;
2466
2467         inp->fibnum = so->so_fibnum;
2468         /* init the small hash table we use to track asocid <-> tcb */
2469         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2470         if (inp->sctp_asocidhash == NULL) {
2471                 crfree(inp->ip_inp.inp.inp_cred);
2472                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2473                 SCTP_INP_INFO_WUNLOCK();
2474                 return (ENOBUFS);
2475         }
2476         SCTP_INCR_EP_COUNT();
2477         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2478         SCTP_INP_INFO_WUNLOCK();
2479
2480         so->so_pcb = (caddr_t)inp;
2481
2482         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2483                 /* UDP style socket */
2484                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2485                     SCTP_PCB_FLAGS_UNBOUND);
2486                 /* Be sure it is NON-BLOCKING IO for UDP */
2487                 /* SCTP_SET_SO_NBIO(so); */
2488         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2489                 /* TCP style socket */
2490                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2491                     SCTP_PCB_FLAGS_UNBOUND);
2492                 /* Be sure we have blocking IO by default */
2493                 SOCK_LOCK(so);
2494                 SCTP_CLEAR_SO_NBIO(so);
2495                 SOCK_UNLOCK(so);
2496         } else {
2497                 /*
2498                  * unsupported socket type (RAW, etc)- in case we missed it
2499                  * in protosw
2500                  */
2501                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2502                 so->so_pcb = NULL;
2503                 crfree(inp->ip_inp.inp.inp_cred);
2504                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2505                 return (EOPNOTSUPP);
2506         }
2507         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2508                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2509                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2510         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2511                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2512                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2513         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2514                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2515                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2516         }
2517         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2518             &inp->sctp_hashmark);
2519         if (inp->sctp_tcbhash == NULL) {
2520                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2521                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2522                 so->so_pcb = NULL;
2523                 crfree(inp->ip_inp.inp.inp_cred);
2524                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2525                 return (ENOBUFS);
2526         }
2527         inp->def_vrf_id = vrf_id;
2528
2529         SCTP_INP_INFO_WLOCK();
2530         SCTP_INP_LOCK_INIT(inp);
2531         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2532         SCTP_INP_READ_INIT(inp);
2533         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2534         /* lock the new ep */
2535         SCTP_INP_WLOCK(inp);
2536
2537         /* add it to the info area */
2538         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2539         SCTP_INP_INFO_WUNLOCK();
2540
2541         TAILQ_INIT(&inp->read_queue);
2542         LIST_INIT(&inp->sctp_addr_list);
2543
2544         LIST_INIT(&inp->sctp_asoc_list);
2545
2546 #ifdef SCTP_TRACK_FREED_ASOCS
2547         /* TEMP CODE */
2548         LIST_INIT(&inp->sctp_asoc_free_list);
2549 #endif
2550         /* Init the timer structure for signature change */
2551         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2552         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2553
2554         /* now init the actual endpoint default data */
2555         m = &inp->sctp_ep;
2556
2557         /* setup the base timeout information */
2558         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2559         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2560         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2561         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2562         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2563         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2564         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2565         /* all max/min max are in ms */
2566         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2567         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2568         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2569         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2570         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2571         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2572         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2573         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2574         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2575         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2576         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2577         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2578         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2579
2580         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2581         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2582         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2583         /* number of streams to pre-open on a association */
2584         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2585
2586         m->default_mtu = 0;
2587         /* Add adaptation cookie */
2588         m->adaptation_layer_indicator = 0;
2589         m->adaptation_layer_indicator_provided = 0;
2590
2591         /* seed random number generator */
2592         m->random_counter = 1;
2593         m->store_at = SCTP_SIGNATURE_SIZE;
2594         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2595         sctp_fill_random_store(m);
2596
2597         /* Minimum cookie size */
2598         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2599             sizeof(struct sctp_state_cookie);
2600         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2601
2602         /* Setup the initial secret */
2603         (void)SCTP_GETTIME_TIMEVAL(&time);
2604         m->time_of_secret_change = time.tv_sec;
2605
2606         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2607                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2608         }
2609         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2610
2611         /* How long is a cookie good for ? */
2612         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2613         /*
2614          * Initialize authentication parameters
2615          */
2616         m->local_hmacs = sctp_default_supported_hmaclist();
2617         m->local_auth_chunks = sctp_alloc_chunklist();
2618         if (inp->asconf_supported) {
2619                 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2620                 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2621         }
2622         m->default_dscp = 0;
2623 #ifdef INET6
2624         m->default_flowlabel = 0;
2625 #endif
2626         m->port = 0;            /* encapsulation disabled by default */
2627         LIST_INIT(&m->shared_keys);
2628         /* add default NULL key as key id 0 */
2629         null_key = sctp_alloc_sharedkey();
2630         sctp_insert_sharedkey(&m->shared_keys, null_key);
2631         SCTP_INP_WUNLOCK(inp);
2632 #ifdef SCTP_LOG_CLOSING
2633         sctp_log_closing(inp, NULL, 12);
2634 #endif
2635         return (error);
2636 }
2637
2638
2639 void
2640 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2641     struct sctp_tcb *stcb)
2642 {
2643         struct sctp_nets *net;
2644         uint16_t lport, rport;
2645         struct sctppcbhead *head;
2646         struct sctp_laddr *laddr, *oladdr;
2647
2648         atomic_add_int(&stcb->asoc.refcnt, 1);
2649         SCTP_TCB_UNLOCK(stcb);
2650         SCTP_INP_INFO_WLOCK();
2651         SCTP_INP_WLOCK(old_inp);
2652         SCTP_INP_WLOCK(new_inp);
2653         SCTP_TCB_LOCK(stcb);
2654         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2655
2656         new_inp->sctp_ep.time_of_secret_change =
2657             old_inp->sctp_ep.time_of_secret_change;
2658         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2659             sizeof(old_inp->sctp_ep.secret_key));
2660         new_inp->sctp_ep.current_secret_number =
2661             old_inp->sctp_ep.current_secret_number;
2662         new_inp->sctp_ep.last_secret_number =
2663             old_inp->sctp_ep.last_secret_number;
2664         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2665
2666         /* make it so new data pours into the new socket */
2667         stcb->sctp_socket = new_inp->sctp_socket;
2668         stcb->sctp_ep = new_inp;
2669
2670         /* Copy the port across */
2671         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2672         rport = stcb->rport;
2673         /* Pull the tcb from the old association */
2674         LIST_REMOVE(stcb, sctp_tcbhash);
2675         LIST_REMOVE(stcb, sctp_tcblist);
2676         if (stcb->asoc.in_asocid_hash) {
2677                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2678         }
2679         /* Now insert the new_inp into the TCP connected hash */
2680         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2681
2682         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2683         /* Its safe to access */
2684         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2685
2686         /* Now move the tcb into the endpoint list */
2687         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2688         /*
2689          * Question, do we even need to worry about the ep-hash since we
2690          * only have one connection? Probably not :> so lets get rid of it
2691          * and not suck up any kernel memory in that.
2692          */
2693         if (stcb->asoc.in_asocid_hash) {
2694                 struct sctpasochead *lhd;
2695
2696                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2697                     new_inp->hashasocidmark)];
2698                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2699         }
2700         /* Ok. Let's restart timer. */
2701         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2702                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2703                     stcb, net);
2704         }
2705
2706         SCTP_INP_INFO_WUNLOCK();
2707         if (new_inp->sctp_tcbhash != NULL) {
2708                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2709                 new_inp->sctp_tcbhash = NULL;
2710         }
2711         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2712                 /* Subset bound, so copy in the laddr list from the old_inp */
2713                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2714                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2715                         if (laddr == NULL) {
2716                                 /*
2717                                  * Gak, what can we do? This assoc is really
2718                                  * HOSED. We probably should send an abort
2719                                  * here.
2720                                  */
2721                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2722                                 continue;
2723                         }
2724                         SCTP_INCR_LADDR_COUNT();
2725                         memset(laddr, 0, sizeof(*laddr));
2726                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2727                         laddr->ifa = oladdr->ifa;
2728                         atomic_add_int(&laddr->ifa->refcount, 1);
2729                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2730                             sctp_nxt_addr);
2731                         new_inp->laddr_count++;
2732                         if (oladdr == stcb->asoc.last_used_address) {
2733                                 stcb->asoc.last_used_address = laddr;
2734                         }
2735                 }
2736         }
2737         /*
2738          * Now any running timers need to be adjusted since we really don't
2739          * care if they are running or not just blast in the new_inp into
2740          * all of them.
2741          */
2742
2743         stcb->asoc.dack_timer.ep = (void *)new_inp;
2744         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2745         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2746         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2747         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2748         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2749         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2750         /* now what about the nets? */
2751         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2752                 net->pmtu_timer.ep = (void *)new_inp;
2753                 net->hb_timer.ep = (void *)new_inp;
2754                 net->rxt_timer.ep = (void *)new_inp;
2755         }
2756         SCTP_INP_WUNLOCK(new_inp);
2757         SCTP_INP_WUNLOCK(old_inp);
2758 }
2759
2760 /*
2761  * insert an laddr entry with the given ifa for the desired list
2762  */
2763 static int
2764 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2765 {
2766         struct sctp_laddr *laddr;
2767
2768         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2769         if (laddr == NULL) {
2770                 /* out of memory? */
2771                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2772                 return (EINVAL);
2773         }
2774         SCTP_INCR_LADDR_COUNT();
2775         memset(laddr, 0, sizeof(*laddr));
2776         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2777         laddr->ifa = ifa;
2778         laddr->action = act;
2779         atomic_add_int(&ifa->refcount, 1);
2780         /* insert it */
2781         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2782
2783         return (0);
2784 }
2785
2786 /*
2787  * Remove an laddr entry from the local address list (on an assoc)
2788  */
2789 static void
2790 sctp_remove_laddr(struct sctp_laddr *laddr)
2791 {
2792
2793         /* remove from the list */
2794         LIST_REMOVE(laddr, sctp_nxt_addr);
2795         sctp_free_ifa(laddr->ifa);
2796         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2797         SCTP_DECR_LADDR_COUNT();
2798 }
2799
2800
2801
2802 /* sctp_ifap is used to bypass normal local address validation checks */
2803 int
2804 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2805     struct sctp_ifa *sctp_ifap, struct thread *p)
2806 {
2807         /* bind a ep to a socket address */
2808         struct sctppcbhead *head;
2809         struct sctp_inpcb *inp, *inp_tmp;
2810         struct inpcb *ip_inp;
2811         int port_reuse_active = 0;
2812         int bindall;
2813         uint16_t lport;
2814         int error;
2815         uint32_t vrf_id;
2816
2817         lport = 0;
2818         bindall = 1;
2819         inp = (struct sctp_inpcb *)so->so_pcb;
2820         ip_inp = (struct inpcb *)so->so_pcb;
2821 #ifdef SCTP_DEBUG
2822         if (addr) {
2823                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2824                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2825                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2826                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2827         }
2828 #endif
2829         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2830                 /* already did a bind, subsequent binds NOT allowed ! */
2831                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2832                 return (EINVAL);
2833         }
2834 #ifdef INVARIANTS
2835         if (p == NULL)
2836                 panic("null proc/thread");
2837 #endif
2838         if (addr != NULL) {
2839                 switch (addr->sa_family) {
2840 #ifdef INET
2841                 case AF_INET:
2842                         {
2843                                 struct sockaddr_in *sin;
2844
2845                                 /* IPV6_V6ONLY socket? */
2846                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2847                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2848                                         return (EINVAL);
2849                                 }
2850                                 if (addr->sa_len != sizeof(*sin)) {
2851                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2852                                         return (EINVAL);
2853                                 }
2854
2855                                 sin = (struct sockaddr_in *)addr;
2856                                 lport = sin->sin_port;
2857                                 /*
2858                                  * For LOOPBACK the prison_local_ip4() call
2859                                  * will transmute the ip address to the
2860                                  * proper value.
2861                                  */
2862                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2863                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2864                                         return (error);
2865                                 }
2866                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2867                                         bindall = 0;
2868                                 }
2869                                 break;
2870                         }
2871 #endif
2872 #ifdef INET6
2873                 case AF_INET6:
2874                         {
2875                                 /*
2876                                  * Only for pure IPv6 Address. (No IPv4
2877                                  * Mapped!)
2878                                  */
2879                                 struct sockaddr_in6 *sin6;
2880
2881                                 sin6 = (struct sockaddr_in6 *)addr;
2882
2883                                 if (addr->sa_len != sizeof(*sin6)) {
2884                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2885                                         return (EINVAL);
2886                                 }
2887                                 lport = sin6->sin6_port;
2888                                 /*
2889                                  * For LOOPBACK the prison_local_ip6() call
2890                                  * will transmute the ipv6 address to the
2891                                  * proper value.
2892                                  */
2893                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2894                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2895                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2896                                         return (error);
2897                                 }
2898                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2899                                         bindall = 0;
2900                                         /* KAME hack: embed scopeid */
2901                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2902                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2903                                                 return (EINVAL);
2904                                         }
2905                                 }
2906                                 /* this must be cleared for ifa_ifwithaddr() */
2907                                 sin6->sin6_scope_id = 0;
2908                                 break;
2909                         }
2910 #endif
2911                 default:
2912                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2913                         return (EAFNOSUPPORT);
2914                 }
2915         }
2916         SCTP_INP_INFO_WLOCK();
2917         SCTP_INP_WLOCK(inp);
2918         /* Setup a vrf_id to be the default for the non-bind-all case. */
2919         vrf_id = inp->def_vrf_id;
2920
2921         /* increase our count due to the unlock we do */
2922         SCTP_INP_INCR_REF(inp);
2923         if (lport) {
2924                 /*
2925                  * Did the caller specify a port? if so we must see if an ep
2926                  * already has this one bound.
2927                  */
2928                 /* got to be root to get at low ports */
2929                 if (ntohs(lport) < IPPORT_RESERVED) {
2930                         if ((p != NULL) && ((error =
2931                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2932                             ) != 0)) {
2933                                 SCTP_INP_DECR_REF(inp);
2934                                 SCTP_INP_WUNLOCK(inp);
2935                                 SCTP_INP_INFO_WUNLOCK();
2936                                 return (error);
2937                         }
2938                 }
2939                 SCTP_INP_WUNLOCK(inp);
2940                 if (bindall) {
2941                         vrf_id = inp->def_vrf_id;
2942                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2943                         if (inp_tmp != NULL) {
2944                                 /*
2945                                  * lock guy returned and lower count note
2946                                  * that we are not bound so inp_tmp should
2947                                  * NEVER be inp. And it is this inp
2948                                  * (inp_tmp) that gets the reference bump,
2949                                  * so we must lower it.
2950                                  */
2951                                 SCTP_INP_DECR_REF(inp_tmp);
2952                                 /* unlock info */
2953                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2954                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2955                                         /*
2956                                          * Ok, must be one-2-one and
2957                                          * allowing port re-use
2958                                          */
2959                                         port_reuse_active = 1;
2960                                         goto continue_anyway;
2961                                 }
2962                                 SCTP_INP_DECR_REF(inp);
2963                                 SCTP_INP_INFO_WUNLOCK();
2964                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2965                                 return (EADDRINUSE);
2966                         }
2967                 } else {
2968                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2969                         if (inp_tmp != NULL) {
2970                                 /*
2971                                  * lock guy returned and lower count note
2972                                  * that we are not bound so inp_tmp should
2973                                  * NEVER be inp. And it is this inp
2974                                  * (inp_tmp) that gets the reference bump,
2975                                  * so we must lower it.
2976                                  */
2977                                 SCTP_INP_DECR_REF(inp_tmp);
2978                                 /* unlock info */
2979                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2980                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2981                                         /*
2982                                          * Ok, must be one-2-one and
2983                                          * allowing port re-use
2984                                          */
2985                                         port_reuse_active = 1;
2986                                         goto continue_anyway;
2987                                 }
2988                                 SCTP_INP_DECR_REF(inp);
2989                                 SCTP_INP_INFO_WUNLOCK();
2990                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2991                                 return (EADDRINUSE);
2992                         }
2993                 }
2994 continue_anyway:
2995                 SCTP_INP_WLOCK(inp);
2996                 if (bindall) {
2997                         /* verify that no lport is not used by a singleton */
2998                         if ((port_reuse_active == 0) &&
2999                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
3000                                 /* Sorry someone already has this one bound */
3001                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3002                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3003                                         port_reuse_active = 1;
3004                                 } else {
3005                                         SCTP_INP_DECR_REF(inp);
3006                                         SCTP_INP_WUNLOCK(inp);
3007                                         SCTP_INP_INFO_WUNLOCK();
3008                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3009                                         return (EADDRINUSE);
3010                                 }
3011                         }
3012                 }
3013         } else {
3014                 uint16_t first, last, candidate;
3015                 uint16_t count;
3016                 int done;
3017
3018                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3019                         first = MODULE_GLOBAL(ipport_hifirstauto);
3020                         last = MODULE_GLOBAL(ipport_hilastauto);
3021                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3022                         if (p && (error =
3023                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3024                             )) {
3025                                 SCTP_INP_DECR_REF(inp);
3026                                 SCTP_INP_WUNLOCK(inp);
3027                                 SCTP_INP_INFO_WUNLOCK();
3028                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3029                                 return (error);
3030                         }
3031                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3032                         last = MODULE_GLOBAL(ipport_lowlastauto);
3033                 } else {
3034                         first = MODULE_GLOBAL(ipport_firstauto);
3035                         last = MODULE_GLOBAL(ipport_lastauto);
3036                 }
3037                 if (first > last) {
3038                         uint16_t temp;
3039
3040                         temp = first;
3041                         first = last;
3042                         last = temp;
3043                 }
3044                 count = last - first + 1;       /* number of candidates */
3045                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3046
3047                 done = 0;
3048                 while (!done) {
3049                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3050                                 done = 1;
3051                         }
3052                         if (!done) {
3053                                 if (--count == 0) {
3054                                         SCTP_INP_DECR_REF(inp);
3055                                         SCTP_INP_WUNLOCK(inp);
3056                                         SCTP_INP_INFO_WUNLOCK();
3057                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3058                                         return (EADDRINUSE);
3059                                 }
3060                                 if (candidate == last)
3061                                         candidate = first;
3062                                 else
3063                                         candidate = candidate + 1;
3064                         }
3065                 }
3066                 lport = htons(candidate);
3067         }
3068         SCTP_INP_DECR_REF(inp);
3069         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3070             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3071                 /*
3072                  * this really should not happen. The guy did a non-blocking
3073                  * bind and then did a close at the same time.
3074                  */
3075                 SCTP_INP_WUNLOCK(inp);
3076                 SCTP_INP_INFO_WUNLOCK();
3077                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3078                 return (EINVAL);
3079         }
3080         /* ok we look clear to give out this port, so lets setup the binding */
3081         if (bindall) {
3082                 /* binding to all addresses, so just set in the proper flags */
3083                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3084                 /* set the automatic addr changes from kernel flag */
3085                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3086                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3087                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3088                 } else {
3089                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3090                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3091                 }
3092                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3093                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3094                 } else {
3095                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3096                 }
3097                 /*
3098                  * set the automatic mobility_base from kernel flag (by
3099                  * micchie)
3100                  */
3101                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3102                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3103                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3104                 } else {
3105                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3106                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3107                 }
3108                 /*
3109                  * set the automatic mobility_fasthandoff from kernel flag
3110                  * (by micchie)
3111                  */
3112                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3113                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3114                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3115                 } else {
3116                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3117                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3118                 }
3119         } else {
3120                 /*
3121                  * bind specific, make sure flags is off and add a new
3122                  * address structure to the sctp_addr_list inside the ep
3123                  * structure.
3124                  *
3125                  * We will need to allocate one and insert it at the head.
3126                  * The socketopt call can just insert new addresses in there
3127                  * as well. It will also have to do the embed scope kame
3128                  * hack too (before adding).
3129                  */
3130                 struct sctp_ifa *ifa;
3131                 union sctp_sockstore store;
3132
3133                 memset(&store, 0, sizeof(store));
3134                 switch (addr->sa_family) {
3135 #ifdef INET
3136                 case AF_INET:
3137                         memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3138                         store.sin.sin_port = 0;
3139                         break;
3140 #endif
3141 #ifdef INET6
3142                 case AF_INET6:
3143                         memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3144                         store.sin6.sin6_port = 0;
3145                         break;
3146 #endif
3147                 default:
3148                         break;
3149                 }
3150                 /*
3151                  * first find the interface with the bound address need to
3152                  * zero out the port to find the address! yuck! can't do
3153                  * this earlier since need port for sctp_pcb_findep()
3154                  */
3155                 if (sctp_ifap != NULL) {
3156                         ifa = sctp_ifap;
3157                 } else {
3158                         /*
3159                          * Note for BSD we hit here always other O/S's will
3160                          * pass things in via the sctp_ifap argument
3161                          * (Panda).
3162                          */
3163                         ifa = sctp_find_ifa_by_addr(&store.sa,
3164                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3165                 }
3166                 if (ifa == NULL) {
3167                         /* Can't find an interface with that address */
3168                         SCTP_INP_WUNLOCK(inp);
3169                         SCTP_INP_INFO_WUNLOCK();
3170                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3171                         return (EADDRNOTAVAIL);
3172                 }
3173 #ifdef INET6
3174                 if (addr->sa_family == AF_INET6) {
3175                         /* GAK, more FIXME IFA lock? */
3176                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3177                                 /* Can't bind a non-existent addr. */
3178                                 SCTP_INP_WUNLOCK(inp);
3179                                 SCTP_INP_INFO_WUNLOCK();
3180                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3181                                 return (EINVAL);
3182                         }
3183                 }
3184 #endif
3185                 /* we're not bound all */
3186                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3187                 /* allow bindx() to send ASCONF's for binding changes */
3188                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3189                 /* clear automatic addr changes from kernel flag */
3190                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3191
3192                 /* add this address to the endpoint list */
3193                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3194                 if (error != 0) {
3195                         SCTP_INP_WUNLOCK(inp);
3196                         SCTP_INP_INFO_WUNLOCK();
3197                         return (error);
3198                 }
3199                 inp->laddr_count++;
3200         }
3201         /* find the bucket */
3202         if (port_reuse_active) {
3203                 /* Put it into tcp 1-2-1 hash */
3204                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3205                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3206         } else {
3207                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3208         }
3209         /* put it in the bucket */
3210         LIST_INSERT_HEAD(head, inp, sctp_hash);
3211         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3212             (void *)head, ntohs(lport), port_reuse_active);
3213         /* set in the port */
3214         inp->sctp_lport = lport;
3215
3216         /* turn off just the unbound flag */
3217         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3218         SCTP_INP_WUNLOCK(inp);
3219         SCTP_INP_INFO_WUNLOCK();
3220         return (0);
3221 }
3222
3223
3224 static void
3225 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3226 {
3227         struct sctp_iterator *it, *nit;
3228
3229         /*
3230          * We enter with the only the ITERATOR_LOCK in place and a write
3231          * lock on the inp_info stuff.
3232          */
3233         it = sctp_it_ctl.cur_it;
3234         if (it && (it->vn != curvnet)) {
3235                 /* Its not looking at our VNET */
3236                 return;
3237         }
3238         if (it && (it->inp == inp)) {
3239                 /*
3240                  * This is tricky and we hold the iterator lock, but when it
3241                  * returns and gets the lock (when we release it) the
3242                  * iterator will try to operate on inp. We need to stop that
3243                  * from happening. But of course the iterator has a
3244                  * reference on the stcb and inp. We can mark it and it will
3245                  * stop.
3246                  *
3247                  * If its a single iterator situation, we set the end
3248                  * iterator flag. Otherwise we set the iterator to go to the
3249                  * next inp.
3250                  *
3251                  */
3252                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3253                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3254                 } else {
3255                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3256                 }
3257         }
3258         /*
3259          * Now go through and remove any single reference to our inp that
3260          * may be still pending on the list
3261          */
3262         SCTP_IPI_ITERATOR_WQ_LOCK();
3263         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3264                 if (it->vn != curvnet) {
3265                         continue;
3266                 }
3267                 if (it->inp == inp) {
3268                         /* This one points to me is it inp specific? */
3269                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3270                                 /* Remove and free this one */
3271                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3272                                     it, sctp_nxt_itr);
3273                                 if (it->function_atend != NULL) {
3274                                         (*it->function_atend) (it->pointer, it->val);
3275                                 }
3276                                 SCTP_FREE(it, SCTP_M_ITER);
3277                         } else {
3278                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3279                                 if (it->inp) {
3280                                         SCTP_INP_INCR_REF(it->inp);
3281                                 }
3282                         }
3283                         /*
3284                          * When its put in the refcnt is incremented so decr
3285                          * it
3286                          */
3287                         SCTP_INP_DECR_REF(inp);
3288                 }
3289         }
3290         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3291 }
3292
3293 /* release sctp_inpcb unbind the port */
3294 void
3295 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3296 {
3297         /*
3298          * Here we free a endpoint. We must find it (if it is in the Hash
3299          * table) and remove it from there. Then we must also find it in the
3300          * overall list and remove it from there. After all removals are
3301          * complete then any timer has to be stopped. Then start the actual
3302          * freeing. a) Any local lists. b) Any associations. c) The hash of
3303          * all associations. d) finally the ep itself.
3304          */
3305         struct sctp_tcb *asoc, *nasoc;
3306         struct sctp_laddr *laddr, *nladdr;
3307         struct inpcb *ip_pcb;
3308         struct socket *so;
3309         int being_refed = 0;
3310         struct sctp_queued_to_read *sq, *nsq;
3311         int cnt;
3312         sctp_sharedkey_t *shared_key, *nshared_key;
3313
3314
3315 #ifdef SCTP_LOG_CLOSING
3316         sctp_log_closing(inp, NULL, 0);
3317 #endif
3318         SCTP_ITERATOR_LOCK();
3319         /* mark any iterators on the list or being processed */
3320         sctp_iterator_inp_being_freed(inp);
3321         SCTP_ITERATOR_UNLOCK();
3322         so = inp->sctp_socket;
3323         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3324                 /* been here before.. eeks.. get out of here */
3325                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3326 #ifdef SCTP_LOG_CLOSING
3327                 sctp_log_closing(inp, NULL, 1);
3328 #endif
3329                 return;
3330         }
3331         SCTP_ASOC_CREATE_LOCK(inp);
3332         SCTP_INP_INFO_WLOCK();
3333
3334         SCTP_INP_WLOCK(inp);
3335         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3336                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3337                 /* socket is gone, so no more wakeups allowed */
3338                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3339                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3340                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3341
3342         }
3343         /* First time through we have the socket lock, after that no more. */
3344         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3345             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3346
3347         if (inp->control) {
3348                 sctp_m_freem(inp->control);
3349                 inp->control = NULL;
3350         }
3351         if (inp->pkt) {
3352                 sctp_m_freem(inp->pkt);
3353                 inp->pkt = NULL;
3354         }
3355         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3356                                          * here but I will be nice :> (i.e.
3357                                          * ip_pcb = ep;) */
3358         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3359                 int cnt_in_sd;
3360
3361                 cnt_in_sd = 0;
3362                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3363                         SCTP_TCB_LOCK(asoc);
3364                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3365                                 /* Skip guys being freed */
3366                                 cnt_in_sd++;
3367                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3368                                         /*
3369                                          * Special case - we did not start a
3370                                          * kill timer on the asoc due to it
3371                                          * was not closed. So go ahead and
3372                                          * start it now.
3373                                          */
3374                                         SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3375                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3376                                 }
3377                                 SCTP_TCB_UNLOCK(asoc);
3378                                 continue;
3379                         }
3380                         if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
3381                             (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3382                             (asoc->asoc.total_output_queue_size == 0)) {
3383                                 /*
3384                                  * If we have data in queue, we don't want
3385                                  * to just free since the app may have done,
3386                                  * send()/close or connect/send/close. And
3387                                  * it wants the data to get across first.
3388                                  */
3389                                 /* Just abandon things in the front states */
3390                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3391                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3392                                         cnt_in_sd++;
3393                                 }
3394                                 continue;
3395                         }
3396                         /* Disconnect the socket please */
3397                         asoc->sctp_socket = NULL;
3398                         SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET);
3399                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3400                             (asoc->asoc.control_pdapi) ||
3401                             (asoc->asoc.size_on_all_streams > 0) ||
3402                             (so && (so->so_rcv.sb_cc > 0))) {
3403                                 /* Left with Data unread */
3404                                 struct mbuf *op_err;
3405
3406                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3407                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3408                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3409                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3410                                 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3411                                     (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3412                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3413                                 }
3414                                 if (sctp_free_assoc(inp, asoc,
3415                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3416                                         cnt_in_sd++;
3417                                 }
3418                                 continue;
3419                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3420                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3421                             (asoc->asoc.stream_queue_cnt == 0)) {
3422                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3423                                         goto abort_anyway;
3424                                 }
3425                                 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3426                                     (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3427                                         struct sctp_nets *netp;
3428
3429                                         /*
3430                                          * there is nothing queued to send,
3431                                          * so I send shutdown
3432                                          */
3433                                         if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3434                                             (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3435                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3436                                         }
3437                                         SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
3438                                         SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
3439                                         sctp_stop_timers_for_shutdown(asoc);
3440                                         if (asoc->asoc.alternate) {
3441                                                 netp = asoc->asoc.alternate;
3442                                         } else {
3443                                                 netp = asoc->asoc.primary_destination;
3444                                         }
3445                                         sctp_send_shutdown(asoc, netp);
3446                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3447                                             netp);
3448                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3449                                             asoc->asoc.primary_destination);
3450                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3451                                 }
3452                         } else {
3453                                 /* mark into shutdown pending */
3454                                 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
3455                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3456                                     asoc->asoc.primary_destination);
3457                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3458                                         SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT);
3459                                 }
3460                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3461                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3462                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3463                                         struct mbuf *op_err;
3464
3465                         abort_anyway:
3466                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3467                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3468                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3469                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3470                                         if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3471                                             (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3472                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3473                                         }
3474                                         if (sctp_free_assoc(inp, asoc,
3475                                             SCTP_PCBFREE_NOFORCE,
3476                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3477                                                 cnt_in_sd++;
3478                                         }
3479                                         continue;
3480                                 } else {
3481                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3482                                 }
3483                         }
3484                         cnt_in_sd++;
3485                         SCTP_TCB_UNLOCK(asoc);
3486                 }
3487                 /* now is there some left in our SHUTDOWN state? */
3488                 if (cnt_in_sd) {
3489 #ifdef SCTP_LOG_CLOSING
3490                         sctp_log_closing(inp, NULL, 2);
3491 #endif
3492                         inp->sctp_socket = NULL;
3493                         SCTP_INP_WUNLOCK(inp);
3494                         SCTP_ASOC_CREATE_UNLOCK(inp);
3495                         SCTP_INP_INFO_WUNLOCK();
3496                         return;
3497                 }
3498         }
3499         inp->sctp_socket = NULL;
3500         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3501             SCTP_PCB_FLAGS_UNBOUND) {
3502                 /*
3503                  * ok, this guy has been bound. It's port is somewhere in
3504                  * the SCTP_BASE_INFO(hash table). Remove it!
3505                  */
3506                 LIST_REMOVE(inp, sctp_hash);
3507                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3508         }
3509
3510         /*
3511          * If there is a timer running to kill us, forget it, since it may
3512          * have a contest on the INP lock.. which would cause us to die ...
3513          */
3514         cnt = 0;
3515         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3516                 SCTP_TCB_LOCK(asoc);
3517                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3518                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3519                                 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3520                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3521                         }
3522                         cnt++;
3523                         SCTP_TCB_UNLOCK(asoc);
3524                         continue;
3525                 }
3526                 /* Free associations that are NOT killing us */
3527                 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
3528                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3529                         struct mbuf *op_err;
3530
3531                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3532                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3533                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3534                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3535                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3536                         cnt++;
3537                         SCTP_TCB_UNLOCK(asoc);
3538                         continue;
3539                 }
3540                 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3541                     (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3542                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3543                 }
3544                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3545                     SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3546                         cnt++;
3547                 }
3548         }
3549         if (cnt) {
3550                 /* Ok we have someone out there that will kill us */
3551                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3552 #ifdef SCTP_LOG_CLOSING
3553                 sctp_log_closing(inp, NULL, 3);
3554 #endif
3555                 SCTP_INP_WUNLOCK(inp);
3556                 SCTP_ASOC_CREATE_UNLOCK(inp);
3557                 SCTP_INP_INFO_WUNLOCK();
3558                 return;
3559         }
3560         if (SCTP_INP_LOCK_CONTENDED(inp))
3561                 being_refed++;
3562         if (SCTP_INP_READ_CONTENDED(inp))
3563                 being_refed++;
3564         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3565                 being_refed++;
3566
3567         if ((inp->refcount) ||
3568             (being_refed) ||
3569             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3570                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3571 #ifdef SCTP_LOG_CLOSING
3572                 sctp_log_closing(inp, NULL, 4);
3573 #endif
3574                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3575                 SCTP_INP_WUNLOCK(inp);
3576                 SCTP_ASOC_CREATE_UNLOCK(inp);
3577                 SCTP_INP_INFO_WUNLOCK();
3578                 return;
3579         }
3580         inp->sctp_ep.signature_change.type = 0;
3581         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3582         /*
3583          * Remove it from the list .. last thing we need a lock for.
3584          */
3585         LIST_REMOVE(inp, sctp_list);
3586         SCTP_INP_WUNLOCK(inp);
3587         SCTP_ASOC_CREATE_UNLOCK(inp);
3588         SCTP_INP_INFO_WUNLOCK();
3589         /*
3590          * Now we release all locks. Since this INP cannot be found anymore
3591          * except possibly by the kill timer that might be running. We call
3592          * the drain function here. It should hit the case were it sees the
3593          * ACTIVE flag cleared and exit out freeing us to proceed and
3594          * destroy everything.
3595          */
3596         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3597                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3598         } else {
3599                 /* Probably un-needed */
3600                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3601         }
3602
3603 #ifdef SCTP_LOG_CLOSING
3604         sctp_log_closing(inp, NULL, 5);
3605 #endif
3606
3607
3608         if ((inp->sctp_asocidhash) != NULL) {
3609                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3610                 inp->sctp_asocidhash = NULL;
3611         }
3612         /* sa_ignore FREED_MEMORY */
3613         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3614                 /* Its only abandoned if it had data left */
3615                 if (sq->length)
3616                         SCTP_STAT_INCR(sctps_left_abandon);
3617
3618                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3619                 sctp_free_remote_addr(sq->whoFrom);
3620                 if (so)
3621                         so->so_rcv.sb_cc -= sq->length;
3622                 if (sq->data) {
3623                         sctp_m_freem(sq->data);
3624                         sq->data = NULL;
3625                 }
3626                 /*
3627                  * no need to free the net count, since at this point all
3628                  * assoc's are gone.
3629                  */
3630                 sctp_free_a_readq(NULL, sq);
3631         }
3632         /* Now the sctp_pcb things */
3633         /*
3634          * free each asoc if it is not already closed/free. we can't use the
3635          * macro here since le_next will get freed as part of the
3636          * sctp_free_assoc() call.
3637          */
3638         if (ip_pcb->inp_options) {
3639                 (void)sctp_m_free(ip_pcb->inp_options);
3640                 ip_pcb->inp_options = 0;
3641         }
3642
3643
3644 #ifdef INET6
3645         if (ip_pcb->inp_vflag & INP_IPV6) {
3646                 struct in6pcb *in6p;
3647
3648                 in6p = (struct in6pcb *)inp;
3649                 ip6_freepcbopts(in6p->in6p_outputopts);
3650         }
3651 #endif                          /* INET6 */
3652         ip_pcb->inp_vflag = 0;
3653         /* free up authentication fields */
3654         if (inp->sctp_ep.local_auth_chunks != NULL)
3655                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3656         if (inp->sctp_ep.local_hmacs != NULL)
3657                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3658
3659         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3660                 LIST_REMOVE(shared_key, next);
3661                 sctp_free_sharedkey(shared_key);
3662                 /* sa_ignore FREED_MEMORY */
3663         }
3664
3665         /*
3666          * if we have an address list the following will free the list of
3667          * ifaddr's that are set into this ep. Again macro limitations here,
3668          * since the LIST_FOREACH could be a bad idea.
3669          */
3670         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3671                 sctp_remove_laddr(laddr);
3672         }
3673
3674 #ifdef SCTP_TRACK_FREED_ASOCS
3675         /* TEMP CODE */
3676         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3677                 LIST_REMOVE(asoc, sctp_tcblist);
3678                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3679                 SCTP_DECR_ASOC_COUNT();
3680         }
3681         /* *** END TEMP CODE *** */
3682 #endif
3683         /* Now lets see about freeing the EP hash table. */
3684         if (inp->sctp_tcbhash != NULL) {
3685                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3686                 inp->sctp_tcbhash = NULL;
3687         }
3688         /* Now we must put the ep memory back into the zone pool */
3689         crfree(inp->ip_inp.inp.inp_cred);
3690         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3691         SCTP_INP_LOCK_DESTROY(inp);
3692         SCTP_INP_READ_DESTROY(inp);
3693         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3694         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3695         SCTP_DECR_EP_COUNT();
3696 }
3697
3698
3699 struct sctp_nets *
3700 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3701 {
3702         struct sctp_nets *net;
3703
3704         /* locate the address */
3705         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3706                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3707                         return (net);
3708         }
3709         return (NULL);
3710 }
3711
3712
3713 int
3714 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3715 {
3716         struct sctp_ifa *sctp_ifa;
3717
3718         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3719         if (sctp_ifa) {
3720                 return (1);
3721         } else {
3722                 return (0);
3723         }
3724 }
3725
3726 /*
3727  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3728  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3729  * stats of stuff.
3730  */
3731 int
3732 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3733     struct sctp_nets **netp, uint16_t port, int set_scope, int from)
3734 {
3735         /*
3736          * The following is redundant to the same lines in the
3737          * sctp_aloc_assoc() but is needed since others call the add address
3738          * function
3739          */
3740         struct sctp_nets *net, *netfirst;
3741         int addr_inscope;
3742
3743         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3744             from);
3745         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3746
3747         netfirst = sctp_findnet(stcb, newaddr);
3748         if (netfirst) {
3749                 /*
3750                  * Lie and return ok, we don't want to make the association
3751                  * go away for this behavior. It will happen in the TCP
3752                  * model in a connected socket. It does not reach the hash
3753                  * table until after the association is built so it can't be
3754                  * found. Mark as reachable, since the initial creation will
3755                  * have been cleared and the NOT_IN_ASSOC flag will have
3756                  * been added... and we don't want to end up removing it
3757                  * back out.
3758                  */
3759                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3760                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3761                             SCTP_ADDR_UNCONFIRMED);
3762                 } else {
3763                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3764                 }
3765
3766                 return (0);
3767         }
3768         addr_inscope = 1;
3769         switch (newaddr->sa_family) {
3770 #ifdef INET
3771         case AF_INET:
3772                 {
3773                         struct sockaddr_in *sin;
3774
3775                         sin = (struct sockaddr_in *)newaddr;
3776                         if (sin->sin_addr.s_addr == 0) {
3777                                 /* Invalid address */
3778                                 return (-1);
3779                         }
3780                         /* zero out the zero area */
3781                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3782
3783                         /* assure len is set */
3784                         sin->sin_len = sizeof(struct sockaddr_in);
3785                         if (set_scope) {
3786                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3787                                         stcb->asoc.scope.ipv4_local_scope = 1;
3788                                 }
3789                         } else {
3790                                 /* Validate the address is in scope */
3791                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3792                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3793                                         addr_inscope = 0;
3794                                 }
3795                         }
3796                         break;
3797                 }
3798 #endif
3799 #ifdef INET6
3800         case AF_INET6:
3801                 {
3802                         struct sockaddr_in6 *sin6;
3803
3804                         sin6 = (struct sockaddr_in6 *)newaddr;
3805                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3806                                 /* Invalid address */
3807                                 return (-1);
3808                         }
3809                         /* assure len is set */
3810                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3811                         if (set_scope) {
3812                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3813                                         stcb->asoc.scope.loopback_scope = 1;
3814                                         stcb->asoc.scope.local_scope = 0;
3815                                         stcb->asoc.scope.ipv4_local_scope = 1;
3816                                         stcb->asoc.scope.site_scope = 1;
3817                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3818                                         /*
3819                                          * If the new destination is a
3820                                          * LINK_LOCAL we must have common
3821                                          * site scope. Don't set the local
3822                                          * scope since we may not share all
3823                                          * links, only loopback can do this.
3824                                          * Links on the local network would
3825                                          * also be on our private network
3826                                          * for v4 too.
3827                                          */
3828                                         stcb->asoc.scope.ipv4_local_scope = 1;
3829                                         stcb->asoc.scope.site_scope = 1;
3830                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3831                                         /*
3832                                          * If the new destination is
3833                                          * SITE_LOCAL then we must have site
3834                                          * scope in common.
3835                                          */
3836                                         stcb->asoc.scope.site_scope = 1;
3837                                 }
3838                         } else {
3839                                 /* Validate the address is in scope */
3840                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3841                                     (stcb->asoc.scope.loopback_scope == 0)) {
3842                                         addr_inscope = 0;
3843                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3844                                     (stcb->asoc.scope.local_scope == 0)) {
3845                                         addr_inscope = 0;
3846                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3847                                     (stcb->asoc.scope.site_scope == 0)) {
3848                                         addr_inscope = 0;
3849                                 }
3850                         }
3851                         break;
3852                 }
3853 #endif
3854         default:
3855                 /* not supported family type */
3856                 return (-1);
3857         }
3858         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3859         if (net == NULL) {
3860                 return (-1);
3861         }
3862         SCTP_INCR_RADDR_COUNT();
3863         memset(net, 0, sizeof(struct sctp_nets));
3864         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3865         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3866         switch (newaddr->sa_family) {
3867 #ifdef INET
3868         case AF_INET:
3869                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3870                 break;
3871 #endif
3872 #ifdef INET6
3873         case AF_INET6:
3874                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3875                 break;
3876 #endif
3877         default:
3878                 break;
3879         }
3880         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3881         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3882                 stcb->asoc.scope.loopback_scope = 1;
3883                 stcb->asoc.scope.ipv4_local_scope = 1;
3884                 stcb->asoc.scope.local_scope = 0;
3885                 stcb->asoc.scope.site_scope = 1;
3886                 addr_inscope = 1;
3887         }
3888         net->failure_threshold = stcb->asoc.def_net_failure;
3889         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3890         if (addr_inscope == 0) {
3891                 net->dest_state = (SCTP_ADDR_REACHABLE |
3892                     SCTP_ADDR_OUT_OF_SCOPE);
3893         } else {
3894                 if (from == SCTP_ADDR_IS_CONFIRMED)
3895                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3896                         net->dest_state = SCTP_ADDR_REACHABLE;
3897                 else
3898                         net->dest_state = SCTP_ADDR_REACHABLE |
3899                             SCTP_ADDR_UNCONFIRMED;
3900         }
3901         /*
3902          * We set this to 0, the timer code knows that this means its an
3903          * initial value
3904          */
3905         net->rto_needed = 1;
3906         net->RTO = 0;
3907         net->RTO_measured = 0;
3908         stcb->asoc.numnets++;
3909         net->ref_count = 1;
3910         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3911         net->port = port;
3912         net->dscp = stcb->asoc.default_dscp;
3913 #ifdef INET6
3914         net->flowlabel = stcb->asoc.default_flowlabel;
3915 #endif
3916         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3917                 net->dest_state |= SCTP_ADDR_NOHB;
3918         } else {
3919                 net->dest_state &= ~SCTP_ADDR_NOHB;
3920         }
3921         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3922                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3923         } else {
3924                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3925         }
3926         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3927         /* Init the timer structure */
3928         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3929         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3930         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3931
3932         /* Now generate a route for this guy */
3933 #ifdef INET6
3934         /* KAME hack: embed scopeid */
3935         if (newaddr->sa_family == AF_INET6) {
3936                 struct sockaddr_in6 *sin6;
3937
3938                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3939                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3940                 sin6->sin6_scope_id = 0;
3941         }
3942 #endif
3943         SCTP_RTALLOC((sctp_route_t *)&net->ro,
3944             stcb->asoc.vrf_id,
3945             stcb->sctp_ep->fibnum);
3946
3947         net->src_addr_selected = 0;
3948         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3949                 /* Get source address */
3950                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3951                     stcb,
3952                     (sctp_route_t *)&net->ro,
3953                     net,
3954                     0,
3955                     stcb->asoc.vrf_id);
3956                 if (stcb->asoc.default_mtu > 0) {
3957                         net->mtu = stcb->asoc.default_mtu;
3958                         switch (net->ro._l_addr.sa.sa_family) {
3959 #ifdef INET
3960                         case AF_INET:
3961                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
3962                                 break;
3963 #endif
3964 #ifdef INET6
3965                         case AF_INET6:
3966                                 net->mtu += SCTP_MIN_OVERHEAD;
3967                                 break;
3968 #endif
3969                         default:
3970                                 break;
3971                         }
3972 #if defined(INET) || defined(INET6)
3973                         if (net->port) {
3974                                 net->mtu += (uint32_t)sizeof(struct udphdr);
3975                         }
3976 #endif
3977                 } else if (net->ro._s_addr != NULL) {
3978                         uint32_t imtu, rmtu, hcmtu;
3979
3980                         net->src_addr_selected = 1;
3981                         /* Now get the interface MTU */
3982                         if (net->ro._s_addr->ifn_p != NULL) {
3983                                 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3984                         } else {
3985                                 imtu = 0;
3986                         }
3987                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3988                         hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum);
3989                         net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu);
3990                         if (rmtu == 0) {
3991                                 /*
3992                                  * Start things off to match mtu of
3993                                  * interface please.
3994                                  */
3995                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3996                                     net->ro.ro_rt, net->mtu);
3997                         }
3998                 }
3999         }
4000         if (net->mtu == 0) {
4001                 if (stcb->asoc.default_mtu > 0) {
4002                         net->mtu = stcb->asoc.default_mtu;
4003                         switch (net->ro._l_addr.sa.sa_family) {
4004 #ifdef INET
4005                         case AF_INET:
4006                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
4007                                 break;
4008 #endif
4009 #ifdef INET6
4010                         case AF_INET6:
4011                                 net->mtu += SCTP_MIN_OVERHEAD;
4012                                 break;
4013 #endif
4014                         default:
4015                                 break;
4016                         }
4017 #if defined(INET) || defined(INET6)
4018                         if (net->port) {
4019                                 net->mtu += (uint32_t)sizeof(struct udphdr);
4020                         }
4021 #endif
4022                 } else {
4023                         switch (newaddr->sa_family) {
4024 #ifdef INET
4025                         case AF_INET:
4026                                 net->mtu = SCTP_DEFAULT_MTU;
4027                                 break;
4028 #endif
4029 #ifdef INET6
4030                         case AF_INET6:
4031                                 net->mtu = 1280;
4032                                 break;
4033 #endif
4034                         default:
4035                                 break;
4036                         }
4037                 }
4038         }
4039 #if defined(INET) || defined(INET6)
4040         if (net->port) {
4041                 net->mtu -= (uint32_t)sizeof(struct udphdr);
4042         }
4043 #endif
4044         if (from == SCTP_ALLOC_ASOC) {
4045                 stcb->asoc.smallest_mtu = net->mtu;
4046         }
4047         if (stcb->asoc.smallest_mtu > net->mtu) {
4048                 sctp_pathmtu_adjustment(stcb, net->mtu);
4049         }
4050 #ifdef INET6
4051         if (newaddr->sa_family == AF_INET6) {
4052                 struct sockaddr_in6 *sin6;
4053
4054                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4055                 (void)sa6_recoverscope(sin6);
4056         }
4057 #endif
4058
4059         /* JRS - Use the congestion control given in the CC module */
4060         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4061                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4062
4063         /*
4064          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4065          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4066          */
4067         net->find_pseudo_cumack = 1;
4068         net->find_rtx_pseudo_cumack = 1;
4069         /* Choose an initial flowid. */
4070         net->flowid = stcb->asoc.my_vtag ^
4071             ntohs(stcb->rport) ^
4072             ntohs(stcb->sctp_ep->sctp_lport);
4073         net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4074         if (netp) {
4075                 *netp = net;
4076         }
4077         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4078         if (net->ro.ro_rt == NULL) {
4079                 /* Since we have no route put it at the back */
4080                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4081         } else if (netfirst == NULL) {
4082                 /* We are the first one in the pool. */
4083                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4084         } else if (netfirst->ro.ro_rt == NULL) {
4085                 /*
4086                  * First one has NO route. Place this one ahead of the first
4087                  * one.
4088                  */
4089                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4090         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4091                 /*
4092                  * This one has a different interface than the one at the
4093                  * top of the list. Place it ahead.
4094                  */
4095                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4096         } else {
4097                 /*
4098                  * Ok we have the same interface as the first one. Move
4099                  * forward until we find either a) one with a NULL route...
4100                  * insert ahead of that b) one with a different ifp.. insert
4101                  * after that. c) end of the list.. insert at the tail.
4102                  */
4103                 struct sctp_nets *netlook;
4104
4105                 do {
4106                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4107                         if (netlook == NULL) {
4108                                 /* End of the list */
4109                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4110                                 break;
4111                         } else if (netlook->ro.ro_rt == NULL) {
4112                                 /* next one has NO route */
4113                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4114                                 break;
4115                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4116                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4117                                     net, sctp_next);
4118                                 break;
4119                         }
4120                         /* Shift forward */
4121                         netfirst = netlook;
4122                 } while (netlook != NULL);
4123         }
4124
4125         /* got to have a primary set */
4126         if (stcb->asoc.primary_destination == 0) {
4127                 stcb->asoc.primary_destination = net;
4128         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4129                     (net->ro.ro_rt) &&
4130             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4131                 /* No route to current primary adopt new primary */
4132                 stcb->asoc.primary_destination = net;
4133         }
4134         /* Validate primary is first */
4135         net = TAILQ_FIRST(&stcb->asoc.nets);
4136         if ((net != stcb->asoc.primary_destination) &&
4137             (stcb->asoc.primary_destination)) {
4138                 /*
4139                  * first one on the list is NOT the primary sctp_cmpaddr()
4140                  * is much more efficient if the primary is the first on the
4141                  * list, make it so.
4142                  */
4143                 TAILQ_REMOVE(&stcb->asoc.nets,
4144                     stcb->asoc.primary_destination, sctp_next);
4145                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4146                     stcb->asoc.primary_destination, sctp_next);
4147         }
4148         return (0);
4149 }
4150
4151
4152 static uint32_t
4153 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4154 {
4155         uint32_t id;
4156         struct sctpasochead *head;
4157         struct sctp_tcb *lstcb;
4158
4159 try_again:
4160         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4161                 /* TSNH */
4162                 return (0);
4163         }
4164         /*
4165          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4166          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4167          */
4168         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4169                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4170         }
4171         id = inp->sctp_associd_counter;
4172         inp->sctp_associd_counter++;
4173         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4174         if (lstcb) {
4175                 goto try_again;
4176         }
4177         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4178         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4179         stcb->asoc.in_asocid_hash = 1;
4180         return (id);
4181 }
4182
4183 /*
4184  * allocate an association and add it to the endpoint. The caller must be
4185  * careful to add all additional addresses once they are know right away or
4186  * else the assoc will be may experience a blackout scenario.
4187  */
4188 struct sctp_tcb *
4189 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4190     int *error, uint32_t override_tag, uint32_t vrf_id,
4191     uint16_t o_streams, uint16_t port,
4192     struct thread *p
4193 )
4194 {
4195         /* note the p argument is only valid in unbound sockets */
4196
4197         struct sctp_tcb *stcb;
4198         struct sctp_association *asoc;
4199         struct sctpasochead *head;
4200         uint16_t rport;
4201         int err;
4202
4203         /*
4204          * Assumption made here: Caller has done a
4205          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4206          * address does not exist already.
4207          */
4208         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4209                 /* Hit max assoc, sorry no more */
4210                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4211                 *error = ENOBUFS;
4212                 return (NULL);
4213         }
4214         if (firstaddr == NULL) {
4215                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4216                 *error = EINVAL;
4217                 return (NULL);
4218         }
4219         SCTP_INP_RLOCK(inp);
4220         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4221             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4222             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4223                 /*
4224                  * If its in the TCP pool, its NOT allowed to create an
4225                  * association. The parent listener needs to call
4226                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4227                  * off, or connected one does this.. its an error.
4228                  */
4229                 SCTP_INP_RUNLOCK(inp);
4230                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4231                 *error = EINVAL;
4232                 return (NULL);
4233         }
4234         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4235             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4236                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4237                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4238                         SCTP_INP_RUNLOCK(inp);
4239                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4240                         *error = EINVAL;
4241                         return (NULL);
4242                 }
4243         }
4244         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4245 #ifdef SCTP_DEBUG
4246         if (firstaddr) {
4247                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4248                 switch (firstaddr->sa_family) {
4249 #ifdef INET
4250                 case AF_INET:
4251                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4252                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4253                         break;
4254 #endif
4255 #ifdef INET6
4256                 case AF_INET6:
4257                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4258                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4259                         break;
4260 #endif
4261                 default:
4262                         break;
4263                 }
4264         } else {
4265                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4266         }
4267 #endif                          /* SCTP_DEBUG */
4268         switch (firstaddr->sa_family) {
4269 #ifdef INET
4270         case AF_INET:
4271                 {
4272                         struct sockaddr_in *sin;
4273
4274                         sin = (struct sockaddr_in *)firstaddr;
4275                         if ((ntohs(sin->sin_port) == 0) ||
4276                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4277                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4278                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4279                                 /* Invalid address */
4280                                 SCTP_INP_RUNLOCK(inp);
4281                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4282                                 *error = EINVAL;
4283                                 return (NULL);
4284                         }
4285                         rport = sin->sin_port;
4286                         break;
4287                 }
4288 #endif
4289 #ifdef INET6
4290         case AF_INET6:
4291                 {
4292                         struct sockaddr_in6 *sin6;
4293
4294                         sin6 = (struct sockaddr_in6 *)firstaddr;
4295                         if ((ntohs(sin6->sin6_port) == 0) ||
4296                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4297                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4298                                 /* Invalid address */
4299                                 SCTP_INP_RUNLOCK(inp);
4300                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4301                                 *error = EINVAL;
4302                                 return (NULL);
4303                         }
4304                         rport = sin6->sin6_port;
4305                         break;
4306                 }
4307 #endif
4308         default:
4309                 /* not supported family type */
4310                 SCTP_INP_RUNLOCK(inp);
4311                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4312                 *error = EINVAL;
4313                 return (NULL);
4314         }
4315         SCTP_INP_RUNLOCK(inp);
4316         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4317                 /*
4318                  * If you have not performed a bind, then we need to do the
4319                  * ephemeral bind for you.
4320                  */
4321                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4322                     (struct sockaddr *)NULL,
4323                     (struct sctp_ifa *)NULL,
4324                     p
4325                     ))) {
4326                         /* bind error, probably perm */
4327                         *error = err;
4328                         return (NULL);
4329                 }
4330         }
4331         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4332         if (stcb == NULL) {
4333                 /* out of memory? */
4334                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4335                 *error = ENOMEM;
4336                 return (NULL);
4337         }
4338         SCTP_INCR_ASOC_COUNT();
4339
4340         memset(stcb, 0, sizeof(*stcb));
4341         asoc = &stcb->asoc;
4342
4343         SCTP_TCB_LOCK_INIT(stcb);
4344         SCTP_TCB_SEND_LOCK_INIT(stcb);
4345         stcb->rport = rport;
4346         /* setup back pointer's */
4347         stcb->sctp_ep = inp;
4348         stcb->sctp_socket = inp->sctp_socket;
4349         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
4350                 /* failed */
4351                 SCTP_TCB_LOCK_DESTROY(stcb);
4352                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4353                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4354                 SCTP_DECR_ASOC_COUNT();
4355                 *error = err;
4356                 return (NULL);
4357         }
4358         /* and the port */
4359         SCTP_INP_INFO_WLOCK();
4360         SCTP_INP_WLOCK(inp);
4361         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4362                 /* inpcb freed while alloc going on */
4363                 SCTP_TCB_LOCK_DESTROY(stcb);
4364                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4365                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4366                 SCTP_INP_WUNLOCK(inp);
4367                 SCTP_INP_INFO_WUNLOCK();
4368                 SCTP_DECR_ASOC_COUNT();
4369                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4370                 *error = EINVAL;
4371                 return (NULL);
4372         }
4373         SCTP_TCB_LOCK(stcb);
4374
4375         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4376         /* now that my_vtag is set, add it to the hash */
4377         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4378         /* put it in the bucket in the vtag hash of assoc's for the system */
4379         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4380         SCTP_INP_INFO_WUNLOCK();
4381
4382         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4383                 /* failure.. memory error? */
4384                 if (asoc->strmout) {
4385                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4386                         asoc->strmout = NULL;
4387                 }
4388                 if (asoc->mapping_array) {
4389                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4390                         asoc->mapping_array = NULL;
4391                 }
4392                 if (asoc->nr_mapping_array) {
4393                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4394                         asoc->nr_mapping_array = NULL;
4395                 }
4396                 SCTP_DECR_ASOC_COUNT();
4397                 SCTP_TCB_UNLOCK(stcb);
4398                 SCTP_TCB_LOCK_DESTROY(stcb);
4399                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4400                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4401                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4402                 SCTP_INP_WUNLOCK(inp);
4403                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4404                 *error = ENOBUFS;
4405                 return (NULL);
4406         }
4407         /* Init all the timers */
4408         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4409         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4410         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4411         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4412         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4413         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4414         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4415
4416         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4417         /* now file the port under the hash as well */
4418         if (inp->sctp_tcbhash != NULL) {
4419                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4420                     inp->sctp_hashmark)];
4421                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4422         }
4423         SCTP_INP_WUNLOCK(inp);
4424         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4425         return (stcb);
4426 }
4427
4428
4429 void
4430 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4431 {
4432         struct sctp_association *asoc;
4433
4434         asoc = &stcb->asoc;
4435         asoc->numnets--;
4436         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4437         if (net == asoc->primary_destination) {
4438                 /* Reset primary */
4439                 struct sctp_nets *lnet;
4440
4441                 lnet = TAILQ_FIRST(&asoc->nets);
4442                 /*
4443                  * Mobility adaptation Ideally, if deleted destination is
4444                  * the primary, it becomes a fast retransmission trigger by
4445                  * the subsequent SET PRIMARY. (by micchie)
4446                  */
4447                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4448                     SCTP_MOBILITY_BASE) ||
4449                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4450                     SCTP_MOBILITY_FASTHANDOFF)) {
4451                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4452                         if (asoc->deleted_primary != NULL) {
4453                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4454                                 goto out;
4455                         }
4456                         asoc->deleted_primary = net;
4457                         atomic_add_int(&net->ref_count, 1);
4458                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4459                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4460                         sctp_mobility_feature_on(stcb->sctp_ep,
4461                             SCTP_MOBILITY_PRIM_DELETED);
4462                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4463                             stcb->sctp_ep, stcb, NULL);
4464                 }
4465 out:
4466                 /* Try to find a confirmed primary */
4467                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4468         }
4469         if (net == asoc->last_data_chunk_from) {
4470                 /* Reset primary */
4471                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4472         }
4473         if (net == asoc->last_control_chunk_from) {
4474                 /* Clear net */
4475                 asoc->last_control_chunk_from = NULL;
4476         }
4477         if (net == stcb->asoc.alternate) {
4478                 sctp_free_remote_addr(stcb->asoc.alternate);
4479                 stcb->asoc.alternate = NULL;
4480         }
4481         sctp_free_remote_addr(net);
4482 }
4483
4484 /*
4485  * remove a remote endpoint address from an association, it will fail if the
4486  * address does not exist.
4487  */
4488 int
4489 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4490 {
4491         /*
4492          * Here we need to remove a remote address. This is quite simple, we
4493          * first find it in the list of address for the association
4494          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4495          * on that item. Note we do not allow it to be removed if there are
4496          * no other addresses.
4497          */
4498         struct sctp_association *asoc;
4499         struct sctp_nets *net, *nnet;
4500
4501         asoc = &stcb->asoc;
4502
4503         /* locate the address */
4504         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4505                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4506                         continue;
4507                 }
4508                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4509                     remaddr)) {
4510                         /* we found the guy */
4511                         if (asoc->numnets < 2) {
4512                                 /* Must have at LEAST two remote addresses */
4513                                 return (-1);
4514                         } else {
4515                                 sctp_remove_net(stcb, net);
4516                                 return (0);
4517                         }
4518                 }
4519         }
4520         /* not found. */
4521         return (-2);
4522 }
4523
4524 void
4525 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4526 {
4527         struct sctpvtaghead *chain;
4528         struct sctp_tagblock *twait_block;
4529         int found = 0;
4530         int i;
4531
4532         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4533         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4534                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4535                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4536                             (twait_block->vtag_block[i].lport == lport) &&
4537                             (twait_block->vtag_block[i].rport == rport)) {
4538                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4539                                 twait_block->vtag_block[i].v_tag = 0;
4540                                 twait_block->vtag_block[i].lport = 0;
4541                                 twait_block->vtag_block[i].rport = 0;
4542                                 found = 1;
4543                                 break;
4544                         }
4545                 }
4546                 if (found)
4547                         break;
4548         }
4549 }
4550
4551 int
4552 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4553 {
4554         struct sctpvtaghead *chain;
4555         struct sctp_tagblock *twait_block;
4556         int found = 0;
4557         int i;
4558
4559         SCTP_INP_INFO_WLOCK();
4560         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4561         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4562                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4563                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4564                             (twait_block->vtag_block[i].lport == lport) &&
4565                             (twait_block->vtag_block[i].rport == rport)) {
4566                                 found = 1;
4567                                 break;
4568                         }
4569                 }
4570                 if (found)
4571                         break;
4572         }
4573         SCTP_INP_INFO_WUNLOCK();
4574         return (found);
4575 }
4576
4577
4578 void
4579 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4580 {
4581         struct sctpvtaghead *chain;
4582         struct sctp_tagblock *twait_block;
4583         struct timeval now;
4584         int set, i;
4585
4586         if (time == 0) {
4587                 /* Its disabled */
4588                 return;
4589         }
4590         (void)SCTP_GETTIME_TIMEVAL(&now);
4591         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4592         set = 0;
4593         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4594                 /* Block(s) present, lets find space, and expire on the fly */
4595                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4596                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4597                             !set) {
4598                                 twait_block->vtag_block[i].tv_sec_at_expire =
4599                                     now.tv_sec + time;
4600                                 twait_block->vtag_block[i].v_tag = tag;
4601                                 twait_block->vtag_block[i].lport = lport;
4602                                 twait_block->vtag_block[i].rport = rport;
4603                                 set = 1;
4604                         } else if ((twait_block->vtag_block[i].v_tag) &&
4605                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4606                                 /* Audit expires this guy */
4607                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4608                                 twait_block->vtag_block[i].v_tag = 0;
4609                                 twait_block->vtag_block[i].lport = 0;
4610                                 twait_block->vtag_block[i].rport = 0;
4611                                 if (set == 0) {
4612                                         /* Reuse it for my new tag */
4613                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4614                                         twait_block->vtag_block[i].v_tag = tag;
4615                                         twait_block->vtag_block[i].lport = lport;
4616                                         twait_block->vtag_block[i].rport = rport;
4617                                         set = 1;
4618                                 }
4619                         }
4620                 }
4621                 if (set) {
4622                         /*
4623                          * We only do up to the block where we can place our
4624                          * tag for audits
4625                          */
4626                         break;
4627                 }
4628         }
4629         /* Need to add a new block to chain */
4630         if (!set) {
4631                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4632                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4633                 if (twait_block == NULL) {
4634 #ifdef INVARIANTS
4635                         panic("Can not alloc tagblock");
4636 #endif
4637                         return;
4638                 }
4639                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4640                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4641                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4642                 twait_block->vtag_block[0].v_tag = tag;
4643                 twait_block->vtag_block[0].lport = lport;
4644                 twait_block->vtag_block[0].rport = rport;
4645         }
4646 }
4647
4648 void
4649 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4650 {
4651         struct sctp_tmit_chunk *chk, *nchk;
4652         struct sctp_queued_to_read *control, *ncontrol;
4653
4654         TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) {
4655                 TAILQ_REMOVE(rh, control, next_instrm);
4656                 control->on_strm_q = 0;
4657                 if (control->on_read_q == 0) {
4658                         sctp_free_remote_addr(control->whoFrom);
4659                         if (control->data) {
4660                                 sctp_m_freem(control->data);
4661                                 control->data = NULL;
4662                         }
4663                 }
4664                 /* Reassembly free? */
4665                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
4666                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
4667                         if (chk->data) {
4668                                 sctp_m_freem(chk->data);
4669                                 chk->data = NULL;
4670                         }
4671                         if (chk->holds_key_ref)
4672                                 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4673                         sctp_free_remote_addr(chk->whoTo);
4674                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4675                         SCTP_DECR_CHK_COUNT();
4676                         /* sa_ignore FREED_MEMORY */
4677                 }
4678                 /*
4679                  * We don't free the address here since all the net's were
4680                  * freed above.
4681                  */
4682                 if (control->on_read_q == 0) {
4683                         sctp_free_a_readq(stcb, control);
4684                 }
4685         }
4686 }
4687
4688
4689 /*-
4690  * Free the association after un-hashing the remote port. This
4691  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4692  * expect that the input to this function IS a locked TCB.
4693  * It will return 0, if it did NOT destroy the association (instead
4694  * it unlocks it. It will return NON-zero if it either destroyed the
4695  * association OR the association is already destroyed.
4696  */
4697 int
4698 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4699 {
4700         int i;
4701         struct sctp_association *asoc;
4702         struct sctp_nets *net, *nnet;
4703         struct sctp_laddr *laddr, *naddr;
4704         struct sctp_tmit_chunk *chk, *nchk;
4705         struct sctp_asconf_addr *aparam, *naparam;
4706         struct sctp_asconf_ack *aack, *naack;
4707         struct sctp_stream_reset_list *strrst, *nstrrst;
4708         struct sctp_queued_to_read *sq, *nsq;
4709         struct sctp_stream_queue_pending *sp, *nsp;
4710         sctp_sharedkey_t *shared_key, *nshared_key;
4711         struct socket *so;
4712
4713         /* first, lets purge the entry from the hash table. */
4714
4715 #ifdef SCTP_LOG_CLOSING
4716         sctp_log_closing(inp, stcb, 6);
4717 #endif
4718         if (stcb->asoc.state == 0) {
4719 #ifdef SCTP_LOG_CLOSING
4720                 sctp_log_closing(inp, NULL, 7);
4721 #endif
4722                 /* there is no asoc, really TSNH :-0 */
4723                 return (1);
4724         }
4725         SCTP_TCB_SEND_LOCK(stcb);
4726         if (stcb->asoc.alternate) {
4727                 sctp_free_remote_addr(stcb->asoc.alternate);
4728                 stcb->asoc.alternate = NULL;
4729         }
4730         /* TEMP CODE */
4731         if (stcb->freed_from_where == 0) {
4732                 /* Only record the first place free happened from */
4733                 stcb->freed_from_where = from_location;
4734         }
4735         /* TEMP CODE */
4736
4737         asoc = &stcb->asoc;
4738         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4739             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4740                 /* nothing around */
4741                 so = NULL;
4742         else
4743                 so = inp->sctp_socket;
4744
4745         /*
4746          * We used timer based freeing if a reader or writer is in the way.
4747          * So we first check if we are actually being called from a timer,
4748          * if so we abort early if a reader or writer is still in the way.
4749          */
4750         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4751             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4752                 /*
4753                  * is it the timer driving us? if so are the reader/writers
4754                  * gone?
4755                  */
4756                 if (stcb->asoc.refcnt) {
4757                         /* nope, reader or writer in the way */
4758                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4759                         /* no asoc destroyed */
4760                         SCTP_TCB_SEND_UNLOCK(stcb);
4761                         SCTP_TCB_UNLOCK(stcb);
4762 #ifdef SCTP_LOG_CLOSING
4763                         sctp_log_closing(inp, stcb, 8);
4764 #endif
4765                         return (0);
4766                 }
4767         }
4768         /* now clean up any other timers */
4769         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4770         asoc->dack_timer.self = NULL;
4771         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4772         /*-
4773          * For stream reset we don't blast this unless
4774          * it is a str-reset timer, it might be the
4775          * free-asoc timer which we DON'T want to
4776          * disturb.
4777          */
4778         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4779                 asoc->strreset_timer.self = NULL;
4780         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4781         asoc->asconf_timer.self = NULL;
4782         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4783         asoc->autoclose_timer.self = NULL;
4784         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4785         asoc->shut_guard_timer.self = NULL;
4786         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4787         asoc->delayed_event_timer.self = NULL;
4788         /* Mobility adaptation */
4789         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4790         asoc->delete_prim_timer.self = NULL;
4791         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4792                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4793                 net->rxt_timer.self = NULL;
4794                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4795                 net->pmtu_timer.self = NULL;
4796                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4797                 net->hb_timer.self = NULL;
4798         }
4799         /* Now the read queue needs to be cleaned up (only once) */
4800         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4801                 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED);
4802                 SCTP_INP_READ_LOCK(inp);
4803                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4804                         if (sq->stcb == stcb) {
4805                                 sq->do_not_ref_stcb = 1;
4806                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4807                                 /*
4808                                  * If there is no end, there never will be
4809                                  * now.
4810                                  */
4811                                 if (sq->end_added == 0) {
4812                                         /* Held for PD-API clear that. */
4813                                         sq->pdapi_aborted = 1;
4814                                         sq->held_length = 0;
4815                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4816                                                 /*
4817                                                  * Need to add a PD-API
4818                                                  * aborted indication.
4819                                                  * Setting the control_pdapi
4820                                                  * assures that it will be
4821                                                  * added right after this
4822                                                  * msg.
4823                                                  */
4824                                                 uint32_t strseq;
4825
4826                                                 stcb->asoc.control_pdapi = sq;
4827                                                 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff);
4828                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4829                                                     stcb,
4830                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4831                                                     (void *)&strseq,
4832                                                     SCTP_SO_LOCKED);
4833                                                 stcb->asoc.control_pdapi = NULL;
4834                                         }
4835                                 }
4836                                 /* Add an end to wake them */
4837                                 sq->end_added = 1;
4838                         }
4839                 }
4840                 SCTP_INP_READ_UNLOCK(inp);
4841                 if (stcb->block_entry) {
4842                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4843                         stcb->block_entry->error = ECONNRESET;
4844                         stcb->block_entry = NULL;
4845                 }
4846         }
4847         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4848                 /*
4849                  * Someone holds a reference OR the socket is unaccepted
4850                  * yet.
4851                  */
4852                 if ((stcb->asoc.refcnt) ||
4853                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4854                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4855                         SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4856                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4857                 }
4858                 SCTP_TCB_SEND_UNLOCK(stcb);
4859                 SCTP_TCB_UNLOCK(stcb);
4860                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4861                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4862                         /* nothing around */
4863                         so = NULL;
4864                 if (so) {
4865                         /* Wake any reader/writers */
4866                         sctp_sorwakeup(inp, so);
4867                         sctp_sowwakeup(inp, so);
4868                 }
4869
4870 #ifdef SCTP_LOG_CLOSING
4871                 sctp_log_closing(inp, stcb, 9);
4872 #endif
4873                 /* no asoc destroyed */
4874                 return (0);
4875         }
4876 #ifdef SCTP_LOG_CLOSING
4877         sctp_log_closing(inp, stcb, 10);
4878 #endif
4879         /*
4880          * When I reach here, no others want to kill the assoc yet.. and I
4881          * own the lock. Now its possible an abort comes in when I do the
4882          * lock exchange below to grab all the locks to do the final take
4883          * out. to prevent this we increment the count, which will start a
4884          * timer and blow out above thus assuring us that we hold exclusive
4885          * killing of the asoc. Note that after getting back the TCB lock we
4886          * will go ahead and increment the counter back up and stop any
4887          * timer a passing stranger may have started :-S
4888          */
4889         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4890                 atomic_add_int(&stcb->asoc.refcnt, 1);
4891
4892                 SCTP_TCB_SEND_UNLOCK(stcb);
4893                 SCTP_TCB_UNLOCK(stcb);
4894                 SCTP_INP_INFO_WLOCK();
4895                 SCTP_INP_WLOCK(inp);
4896                 SCTP_TCB_LOCK(stcb);
4897                 SCTP_TCB_SEND_LOCK(stcb);
4898         }
4899         /* Double check the GONE flag */
4900         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4901             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4902                 /* nothing around */
4903                 so = NULL;
4904
4905         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4906             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4907                 /*
4908                  * For TCP type we need special handling when we are
4909                  * connected. We also include the peel'ed off ones to.
4910                  */
4911                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4912                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4913                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4914                         if (so) {
4915                                 SOCK_LOCK(so);
4916                                 if (so->so_rcv.sb_cc == 0) {
4917                                         so->so_state &= ~(SS_ISCONNECTING |
4918                                             SS_ISDISCONNECTING |
4919                                             SS_ISCONFIRMING |
4920                                             SS_ISCONNECTED);
4921                                 }
4922                                 socantrcvmore_locked(so);
4923                                 socantsendmore(so);
4924                                 sctp_sowwakeup(inp, so);
4925                                 sctp_sorwakeup(inp, so);
4926                                 SCTP_SOWAKEUP(so);
4927                         }
4928                 }
4929         }
4930
4931         /*
4932          * Make it invalid too, that way if its about to run it will abort
4933          * and return.
4934          */
4935         /* re-increment the lock */
4936         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4937                 atomic_add_int(&stcb->asoc.refcnt, -1);
4938         }
4939         if (stcb->asoc.refcnt) {
4940                 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4941                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4942                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4943                         SCTP_INP_INFO_WUNLOCK();
4944                         SCTP_INP_WUNLOCK(inp);
4945                 }
4946                 SCTP_TCB_SEND_UNLOCK(stcb);
4947                 SCTP_TCB_UNLOCK(stcb);
4948                 return (0);
4949         }
4950         asoc->state = 0;
4951         if (inp->sctp_tcbhash) {
4952                 LIST_REMOVE(stcb, sctp_tcbhash);
4953         }
4954         if (stcb->asoc.in_asocid_hash) {
4955                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4956         }
4957         /* Now lets remove it from the list of ALL associations in the EP */
4958         LIST_REMOVE(stcb, sctp_tcblist);
4959         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4960                 SCTP_INP_INCR_REF(inp);
4961                 SCTP_INP_WUNLOCK(inp);
4962         }
4963         /* pull from vtag hash */
4964         LIST_REMOVE(stcb, sctp_asocs);
4965         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4966             inp->sctp_lport, stcb->rport);
4967
4968         /*
4969          * Now restop the timers to be sure this is paranoia at is finest!
4970          */
4971         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4972         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4973         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4974         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4975         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4976         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4977         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4978         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4979                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4980                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4981                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4982         }
4983
4984         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4985         /*
4986          * The chunk lists and such SHOULD be empty but we check them just
4987          * in case.
4988          */
4989         /* anything on the wheel needs to be removed */
4990         for (i = 0; i < asoc->streamoutcnt; i++) {
4991                 struct sctp_stream_out *outs;
4992
4993                 outs = &asoc->strmout[i];
4994                 /* now clean up any chunks here */
4995                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4996                         atomic_subtract_int(&asoc->stream_queue_cnt, 1);
4997                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4998                         stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1);
4999                         sctp_free_spbufspace(stcb, asoc, sp);
5000                         if (sp->data) {
5001                                 if (so) {
5002                                         /* Still an open socket - report */
5003                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
5004                                             0, (void *)sp, SCTP_SO_LOCKED);
5005                                 }
5006                                 if (sp->data) {
5007                                         sctp_m_freem(sp->data);
5008                                         sp->data = NULL;
5009                                         sp->tail_mbuf = NULL;
5010                                         sp->length = 0;
5011                                 }
5012                         }
5013                         if (sp->net) {
5014                                 sctp_free_remote_addr(sp->net);
5015                                 sp->net = NULL;
5016                         }
5017                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
5018                 }
5019         }
5020         /* sa_ignore FREED_MEMORY */
5021         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
5022                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
5023                 SCTP_FREE(strrst, SCTP_M_STRESET);
5024         }
5025         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
5026                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
5027                 if (sq->data) {
5028                         sctp_m_freem(sq->data);
5029                         sq->data = NULL;
5030                 }
5031                 sctp_free_remote_addr(sq->whoFrom);
5032                 sq->whoFrom = NULL;
5033                 sq->stcb = NULL;
5034                 /* Free the ctl entry */
5035                 sctp_free_a_readq(stcb, sq);
5036                 /* sa_ignore FREED_MEMORY */
5037         }
5038         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
5039                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
5040                 if (chk->data) {
5041                         sctp_m_freem(chk->data);
5042                         chk->data = NULL;
5043                 }
5044                 if (chk->holds_key_ref)
5045                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5046                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5047                 SCTP_DECR_CHK_COUNT();
5048                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
5049                 asoc->free_chunk_cnt--;
5050                 /* sa_ignore FREED_MEMORY */
5051         }
5052         /* pending send queue SHOULD be empty */
5053         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5054                 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5055                         asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5056 #ifdef INVARIANTS
5057                 } else {
5058                         panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5059 #endif
5060                 }
5061                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5062                 if (chk->data) {
5063                         if (so) {
5064                                 /* Still a socket? */
5065                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5066                                     0, chk, SCTP_SO_LOCKED);
5067                         }
5068                         if (chk->data) {
5069                                 sctp_m_freem(chk->data);
5070                                 chk->data = NULL;
5071                         }
5072                 }
5073                 if (chk->holds_key_ref)
5074                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5075                 if (chk->whoTo) {
5076                         sctp_free_remote_addr(chk->whoTo);
5077                         chk->whoTo = NULL;
5078                 }
5079                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5080                 SCTP_DECR_CHK_COUNT();
5081                 /* sa_ignore FREED_MEMORY */
5082         }
5083         /* sent queue SHOULD be empty */
5084         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5085                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5086                         if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5087                                 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5088 #ifdef INVARIANTS
5089                         } else {
5090                                 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5091 #endif
5092                         }
5093                 }
5094                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5095                 if (chk->data) {
5096                         if (so) {
5097                                 /* Still a socket? */
5098                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5099                                     0, chk, SCTP_SO_LOCKED);
5100                         }
5101                         if (chk->data) {
5102                                 sctp_m_freem(chk->data);
5103                                 chk->data = NULL;
5104                         }
5105                 }
5106                 if (chk->holds_key_ref)
5107                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5108                 sctp_free_remote_addr(chk->whoTo);
5109                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5110                 SCTP_DECR_CHK_COUNT();
5111                 /* sa_ignore FREED_MEMORY */
5112         }
5113 #ifdef INVARIANTS
5114         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5115                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5116                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5117                 }
5118         }
5119 #endif
5120         /* control queue MAY not be empty */
5121         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5122                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5123                 if (chk->data) {
5124                         sctp_m_freem(chk->data);
5125                         chk->data = NULL;
5126                 }
5127                 if (chk->holds_key_ref)
5128                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5129                 sctp_free_remote_addr(chk->whoTo);
5130                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5131                 SCTP_DECR_CHK_COUNT();
5132                 /* sa_ignore FREED_MEMORY */
5133         }
5134         /* ASCONF queue MAY not be empty */
5135         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5136                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5137                 if (chk->data) {
5138                         sctp_m_freem(chk->data);
5139                         chk->data = NULL;
5140                 }
5141                 if (chk->holds_key_ref)
5142                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5143                 sctp_free_remote_addr(chk->whoTo);
5144                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5145                 SCTP_DECR_CHK_COUNT();
5146                 /* sa_ignore FREED_MEMORY */
5147         }
5148         if (asoc->mapping_array) {
5149                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5150                 asoc->mapping_array = NULL;
5151         }
5152         if (asoc->nr_mapping_array) {
5153                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5154                 asoc->nr_mapping_array = NULL;
5155         }
5156         /* the stream outs */
5157         if (asoc->strmout) {
5158                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5159                 asoc->strmout = NULL;
5160         }
5161         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5162         if (asoc->strmin) {
5163                 for (i = 0; i < asoc->streamincnt; i++) {
5164                         sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5165                         sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5166                 }
5167                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5168                 asoc->strmin = NULL;
5169         }
5170         asoc->streamincnt = 0;
5171         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5172 #ifdef INVARIANTS
5173                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5174                         panic("no net's left alloc'ed, or list points to itself");
5175                 }
5176 #endif
5177                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5178                 sctp_free_remote_addr(net);
5179         }
5180         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5181                 /* sa_ignore FREED_MEMORY */
5182                 sctp_remove_laddr(laddr);
5183         }
5184
5185         /* pending asconf (address) parameters */
5186         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5187                 /* sa_ignore FREED_MEMORY */
5188                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5189                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5190         }
5191         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5192                 /* sa_ignore FREED_MEMORY */
5193                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5194                 if (aack->data != NULL) {
5195                         sctp_m_freem(aack->data);
5196                 }
5197                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5198         }
5199         /* clean up auth stuff */
5200         if (asoc->local_hmacs)
5201                 sctp_free_hmaclist(asoc->local_hmacs);
5202         if (asoc->peer_hmacs)
5203                 sctp_free_hmaclist(asoc->peer_hmacs);
5204
5205         if (asoc->local_auth_chunks)
5206                 sctp_free_chunklist(asoc->local_auth_chunks);
5207         if (asoc->peer_auth_chunks)
5208                 sctp_free_chunklist(asoc->peer_auth_chunks);
5209
5210         sctp_free_authinfo(&asoc->authinfo);
5211
5212         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5213                 LIST_REMOVE(shared_key, next);
5214                 sctp_free_sharedkey(shared_key);
5215                 /* sa_ignore FREED_MEMORY */
5216         }
5217
5218         /* Insert new items here :> */
5219
5220         /* Get rid of LOCK */
5221         SCTP_TCB_SEND_UNLOCK(stcb);
5222         SCTP_TCB_UNLOCK(stcb);
5223         SCTP_TCB_LOCK_DESTROY(stcb);
5224         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5225         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5226                 SCTP_INP_INFO_WUNLOCK();
5227                 SCTP_INP_RLOCK(inp);
5228         }
5229 #ifdef SCTP_TRACK_FREED_ASOCS
5230         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5231                 /* now clean up the tasoc itself */
5232                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5233                 SCTP_DECR_ASOC_COUNT();
5234         } else {
5235                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5236         }
5237 #else
5238         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5239         SCTP_DECR_ASOC_COUNT();
5240 #endif
5241         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5242                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5243                         /*
5244                          * If its NOT the inp_free calling us AND sctp_close
5245                          * as been called, we call back...
5246                          */
5247                         SCTP_INP_RUNLOCK(inp);
5248                         /*
5249                          * This will start the kill timer (if we are the
5250                          * last one) since we hold an increment yet. But
5251                          * this is the only safe way to do this since
5252                          * otherwise if the socket closes at the same time
5253                          * we are here we might collide in the cleanup.
5254                          */
5255                         sctp_inpcb_free(inp,
5256                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5257                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5258                         SCTP_INP_DECR_REF(inp);
5259                         goto out_of;
5260                 } else {
5261                         /* The socket is still open. */
5262                         SCTP_INP_DECR_REF(inp);
5263                 }
5264         }
5265         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5266                 SCTP_INP_RUNLOCK(inp);
5267         }
5268 out_of:
5269         /* destroyed the asoc */
5270 #ifdef SCTP_LOG_CLOSING
5271         sctp_log_closing(inp, NULL, 11);
5272 #endif
5273         return (1);
5274 }
5275
5276
5277
5278 /*
5279  * determine if a destination is "reachable" based upon the addresses bound
5280  * to the current endpoint (e.g. only v4 or v6 currently bound)
5281  */
5282 /*
5283  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5284  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5285  * types bound as its endpoint
5286  */
5287 int
5288 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5289 {
5290         struct sctp_inpcb *inp;
5291         int answer;
5292
5293         /*
5294          * No locks here, the TCB, in all cases is already locked and an
5295          * assoc is up. There is either a INP lock by the caller applied (in
5296          * asconf case when deleting an address) or NOT in the HB case,
5297          * however if HB then the INP increment is up and the INP will not
5298          * be removed (on top of the fact that we have a TCB lock). So we
5299          * only want to read the sctp_flags, which is either bound-all or
5300          * not.. no protection needed since once an assoc is up you can't be
5301          * changing your binding.
5302          */
5303         inp = stcb->sctp_ep;
5304         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5305                 /* if bound all, destination is not restricted */
5306                 /*
5307                  * RRS: Question during lock work: Is this correct? If you
5308                  * are bound-all you still might need to obey the V4--V6
5309                  * flags??? IMO this bound-all stuff needs to be removed!
5310                  */
5311                 return (1);
5312         }
5313         /* NOTE: all "scope" checks are done when local addresses are added */
5314         switch (destaddr->sa_family) {
5315 #ifdef INET6
5316         case AF_INET6:
5317                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5318                 break;
5319 #endif
5320 #ifdef INET
5321         case AF_INET:
5322                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5323                 break;
5324 #endif
5325         default:
5326                 /* invalid family, so it's unreachable */
5327                 answer = 0;
5328                 break;
5329         }
5330         return (answer);
5331 }
5332
5333 /*
5334  * update the inp_vflags on an endpoint
5335  */
5336 static void
5337 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5338 {
5339         struct sctp_laddr *laddr;
5340
5341         /* first clear the flag */
5342         inp->ip_inp.inp.inp_vflag = 0;
5343         /* set the flag based on addresses on the ep list */
5344         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5345                 if (laddr->ifa == NULL) {
5346                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5347                             __func__);
5348                         continue;
5349                 }
5350
5351                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5352                         continue;
5353                 }
5354                 switch (laddr->ifa->address.sa.sa_family) {
5355 #ifdef INET6
5356                 case AF_INET6:
5357                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5358                         break;
5359 #endif
5360 #ifdef INET
5361                 case AF_INET:
5362                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5363                         break;
5364 #endif
5365                 default:
5366                         break;
5367                 }
5368         }
5369 }
5370
5371 /*
5372  * Add the address to the endpoint local address list There is nothing to be
5373  * done if we are bound to all addresses
5374  */
5375 void
5376 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5377 {
5378         struct sctp_laddr *laddr;
5379         struct sctp_tcb *stcb;
5380         int fnd, error = 0;
5381
5382         fnd = 0;
5383
5384         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5385                 /* You are already bound to all. You have it already */
5386                 return;
5387         }
5388 #ifdef INET6
5389         if (ifa->address.sa.sa_family == AF_INET6) {
5390                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5391                         /* Can't bind a non-useable addr. */
5392                         return;
5393                 }
5394         }
5395 #endif
5396         /* first, is it already present? */
5397         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5398                 if (laddr->ifa == ifa) {
5399                         fnd = 1;
5400                         break;
5401                 }
5402         }
5403
5404         if (fnd == 0) {
5405                 /* Not in the ep list */
5406                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5407                 if (error != 0)
5408                         return;
5409                 inp->laddr_count++;
5410                 /* update inp_vflag flags */
5411                 switch (ifa->address.sa.sa_family) {
5412 #ifdef INET6
5413                 case AF_INET6:
5414                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5415                         break;
5416 #endif
5417 #ifdef INET
5418                 case AF_INET:
5419                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5420                         break;
5421 #endif
5422                 default:
5423                         break;
5424                 }
5425                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5426                         sctp_add_local_addr_restricted(stcb, ifa);
5427                 }
5428         }
5429         return;
5430 }
5431
5432
5433 /*
5434  * select a new (hopefully reachable) destination net (should only be used
5435  * when we deleted an ep addr that is the only usable source address to reach
5436  * the destination net)
5437  */
5438 static void
5439 sctp_select_primary_destination(struct sctp_tcb *stcb)
5440 {
5441         struct sctp_nets *net;
5442
5443         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5444                 /* for now, we'll just pick the first reachable one we find */
5445                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5446                         continue;
5447                 if (sctp_destination_is_reachable(stcb,
5448                     (struct sockaddr *)&net->ro._l_addr)) {
5449                         /* found a reachable destination */
5450                         stcb->asoc.primary_destination = net;
5451                 }
5452         }
5453         /* I can't there from here! ...we're gonna die shortly... */
5454 }
5455
5456
5457 /*
5458  * Delete the address from the endpoint local address list. There is nothing
5459  * to be done if we are bound to all addresses
5460  */
5461 void
5462 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5463 {
5464         struct sctp_laddr *laddr;
5465         int fnd;
5466
5467         fnd = 0;
5468         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5469                 /* You are already bound to all. You have it already */
5470                 return;
5471         }
5472         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5473                 if (laddr->ifa == ifa) {
5474                         fnd = 1;
5475                         break;
5476                 }
5477         }
5478         if (fnd && (inp->laddr_count < 2)) {
5479                 /* can't delete unless there are at LEAST 2 addresses */
5480                 return;
5481         }
5482         if (fnd) {
5483                 /*
5484                  * clean up any use of this address go through our
5485                  * associations and clear any last_used_address that match
5486                  * this one for each assoc, see if a new primary_destination
5487                  * is needed
5488                  */
5489                 struct sctp_tcb *stcb;
5490
5491                 /* clean up "next_addr_touse" */
5492                 if (inp->next_addr_touse == laddr)
5493                         /* delete this address */
5494                         inp->next_addr_touse = NULL;
5495
5496                 /* clean up "last_used_address" */
5497                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5498                         struct sctp_nets *net;
5499
5500                         SCTP_TCB_LOCK(stcb);
5501                         if (stcb->asoc.last_used_address == laddr)
5502                                 /* delete this address */
5503                                 stcb->asoc.last_used_address = NULL;
5504                         /*
5505                          * Now spin through all the nets and purge any ref
5506                          * to laddr
5507                          */
5508                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5509                                 if (net->ro._s_addr == laddr->ifa) {
5510                                         /* Yep, purge src address selected */
5511                                         sctp_rtentry_t *rt;
5512
5513                                         /* delete this address if cached */
5514                                         rt = net->ro.ro_rt;
5515                                         if (rt != NULL) {
5516                                                 RTFREE(rt);
5517                                                 net->ro.ro_rt = NULL;
5518                                         }
5519                                         sctp_free_ifa(net->ro._s_addr);
5520                                         net->ro._s_addr = NULL;
5521                                         net->src_addr_selected = 0;
5522                                 }
5523                         }
5524                         SCTP_TCB_UNLOCK(stcb);
5525                 }               /* for each tcb */
5526                 /* remove it from the ep list */
5527                 sctp_remove_laddr(laddr);
5528                 inp->laddr_count--;
5529                 /* update inp_vflag flags */
5530                 sctp_update_ep_vflag(inp);
5531         }
5532         return;
5533 }
5534
5535 /*
5536  * Add the address to the TCB local address restricted list.
5537  * This is a "pending" address list (eg. addresses waiting for an
5538  * ASCONF-ACK response) and cannot be used as a valid source address.
5539  */
5540 void
5541 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5542 {
5543         struct sctp_laddr *laddr;
5544         struct sctpladdr *list;
5545
5546         /*
5547          * Assumes TCB is locked.. and possibly the INP. May need to
5548          * confirm/fix that if we need it and is not the case.
5549          */
5550         list = &stcb->asoc.sctp_restricted_addrs;
5551
5552 #ifdef INET6
5553         if (ifa->address.sa.sa_family == AF_INET6) {
5554                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5555                         /* Can't bind a non-existent addr. */
5556                         return;
5557                 }
5558         }
5559 #endif
5560         /* does the address already exist? */
5561         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5562                 if (laddr->ifa == ifa) {
5563                         return;
5564                 }
5565         }
5566
5567         /* add to the list */
5568         (void)sctp_insert_laddr(list, ifa, 0);
5569         return;
5570 }
5571
5572 /*
5573  * Remove a local address from the TCB local address restricted list
5574  */
5575 void
5576 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5577 {
5578         struct sctp_inpcb *inp;
5579         struct sctp_laddr *laddr;
5580
5581         /*
5582          * This is called by asconf work. It is assumed that a) The TCB is
5583          * locked and b) The INP is locked. This is true in as much as I can
5584          * trace through the entry asconf code where I did these locks.
5585          * Again, the ASCONF code is a bit different in that it does lock
5586          * the INP during its work often times. This must be since we don't
5587          * want other proc's looking up things while what they are looking
5588          * up is changing :-D
5589          */
5590
5591         inp = stcb->sctp_ep;
5592         /* if subset bound and don't allow ASCONF's, can't delete last */
5593         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5594             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5595                 if (stcb->sctp_ep->laddr_count < 2) {
5596                         /* can't delete last address */
5597                         return;
5598                 }
5599         }
5600         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5601                 /* remove the address if it exists */
5602                 if (laddr->ifa == NULL)
5603                         continue;
5604                 if (laddr->ifa == ifa) {
5605                         sctp_remove_laddr(laddr);
5606                         return;
5607                 }
5608         }
5609
5610         /* address not found! */
5611         return;
5612 }
5613
5614 /*
5615  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5616  */
5617 /* sysctl */
5618 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5619 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5620
5621
5622
5623 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5624 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5625 int *sctp_cpuarry = NULL;
5626 void
5627 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5628 {
5629         /* Queue a packet to a processor for the specified core */
5630         struct sctp_mcore_queue *qent;
5631         struct sctp_mcore_ctrl *wkq;
5632         int need_wake = 0;
5633
5634         if (sctp_mcore_workers == NULL) {
5635                 /* Something went way bad during setup */
5636                 sctp_input_with_port(m, off, 0);
5637                 return;
5638         }
5639         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5640             (sizeof(struct sctp_mcore_queue)),
5641             SCTP_M_MCORE);
5642         if (qent == NULL) {
5643                 /* This is trouble  */
5644                 sctp_input_with_port(m, off, 0);
5645                 return;
5646         }
5647         qent->vn = curvnet;
5648         qent->m = m;
5649         qent->off = off;
5650         qent->v6 = 0;
5651         wkq = &sctp_mcore_workers[cpu_to_use];
5652         SCTP_MCORE_QLOCK(wkq);
5653
5654         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5655         if (wkq->running == 0) {
5656                 need_wake = 1;
5657         }
5658         SCTP_MCORE_QUNLOCK(wkq);
5659         if (need_wake) {
5660                 wakeup(&wkq->running);
5661         }
5662 }
5663
5664 static void
5665 sctp_mcore_thread(void *arg)
5666 {
5667
5668         struct sctp_mcore_ctrl *wkq;
5669         struct sctp_mcore_queue *qent;
5670
5671         wkq = (struct sctp_mcore_ctrl *)arg;
5672         struct mbuf *m;
5673         int off, v6;
5674
5675         /* Wait for first tickle */
5676         SCTP_MCORE_LOCK(wkq);
5677         wkq->running = 0;
5678         msleep(&wkq->running,
5679             &wkq->core_mtx,
5680             0, "wait for pkt", 0);
5681         SCTP_MCORE_UNLOCK(wkq);
5682
5683         /* Bind to our cpu */
5684         thread_lock(curthread);
5685         sched_bind(curthread, wkq->cpuid);
5686         thread_unlock(curthread);
5687
5688         /* Now lets start working */
5689         SCTP_MCORE_LOCK(wkq);
5690         /* Now grab lock and go */
5691         for (;;) {
5692                 SCTP_MCORE_QLOCK(wkq);
5693 skip_sleep:
5694                 wkq->running = 1;
5695                 qent = TAILQ_FIRST(&wkq->que);
5696                 if (qent) {
5697                         TAILQ_REMOVE(&wkq->que, qent, next);
5698                         SCTP_MCORE_QUNLOCK(wkq);
5699                         CURVNET_SET(qent->vn);
5700                         m = qent->m;
5701                         off = qent->off;
5702                         v6 = qent->v6;
5703                         SCTP_FREE(qent, SCTP_M_MCORE);
5704                         if (v6 == 0) {
5705                                 sctp_input_with_port(m, off, 0);
5706                         } else {
5707                                 SCTP_PRINTF("V6 not yet supported\n");
5708                                 sctp_m_freem(m);
5709                         }
5710                         CURVNET_RESTORE();
5711                         SCTP_MCORE_QLOCK(wkq);
5712                 }
5713                 wkq->running = 0;
5714                 if (!TAILQ_EMPTY(&wkq->que)) {
5715                         goto skip_sleep;
5716                 }
5717                 SCTP_MCORE_QUNLOCK(wkq);
5718                 msleep(&wkq->running,
5719                     &wkq->core_mtx,
5720                     0, "wait for pkt", 0);
5721         }
5722 }
5723
5724 static void
5725 sctp_startup_mcore_threads(void)
5726 {
5727         int i, cpu;
5728
5729         if (mp_ncpus == 1)
5730                 return;
5731
5732         if (sctp_mcore_workers != NULL) {
5733                 /*
5734                  * Already been here in some previous vnet?
5735                  */
5736                 return;
5737         }
5738         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5739             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5740             SCTP_M_MCORE);
5741         if (sctp_mcore_workers == NULL) {
5742                 /* TSNH I hope */
5743                 return;
5744         }
5745         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5746             sizeof(struct sctp_mcore_ctrl)));
5747         /* Init the structures */
5748         for (i = 0; i <= mp_maxid; i++) {
5749                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5750                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5751                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5752                 sctp_mcore_workers[i].cpuid = i;
5753         }
5754         if (sctp_cpuarry == NULL) {
5755                 SCTP_MALLOC(sctp_cpuarry, int *,
5756                     (mp_ncpus * sizeof(int)),
5757                     SCTP_M_MCORE);
5758                 i = 0;
5759                 CPU_FOREACH(cpu) {
5760                         sctp_cpuarry[i] = cpu;
5761                         i++;
5762                 }
5763         }
5764
5765         /* Now start them all */
5766         CPU_FOREACH(cpu) {
5767                 (void)kproc_create(sctp_mcore_thread,
5768                     (void *)&sctp_mcore_workers[cpu],
5769                     &sctp_mcore_workers[cpu].thread_proc,
5770                     RFPROC,
5771                     SCTP_KTHREAD_PAGES,
5772                     SCTP_MCORE_NAME);
5773
5774         }
5775 }
5776 #endif
5777
5778 void
5779 sctp_pcb_init()
5780 {
5781         /*
5782          * SCTP initialization for the PCB structures should be called by
5783          * the sctp_init() function.
5784          */
5785         int i;
5786         struct timeval tv;
5787
5788         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5789                 /* error I was called twice */
5790                 return;
5791         }
5792         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5793
5794 #if defined(SCTP_LOCAL_TRACE_BUF)
5795         memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log));
5796 #endif
5797 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5798         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5799             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5800             SCTP_M_MCORE);
5801 #endif
5802         (void)SCTP_GETTIME_TIMEVAL(&tv);
5803 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5804         memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1));
5805         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
5806         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
5807 #else
5808         memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat));
5809         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
5810         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
5811 #endif
5812         /* init the empty list of (All) Endpoints */
5813         LIST_INIT(&SCTP_BASE_INFO(listhead));
5814
5815
5816         /* init the hash table of endpoints */
5817         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5818         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5819         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5820         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5821             &SCTP_BASE_INFO(hashasocmark));
5822         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5823             &SCTP_BASE_INFO(hashmark));
5824         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5825             &SCTP_BASE_INFO(hashtcpmark));
5826         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5827
5828
5829         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5830             &SCTP_BASE_INFO(hashvrfmark));
5831
5832         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5833             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5834         /* init the zones */
5835         /*
5836          * FIX ME: Should check for NULL returns, but if it does fail we are
5837          * doomed to panic anyways... add later maybe.
5838          */
5839         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5840             sizeof(struct sctp_inpcb), maxsockets);
5841
5842         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5843             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5844
5845         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5846             sizeof(struct sctp_laddr),
5847             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5848
5849         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5850             sizeof(struct sctp_nets),
5851             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5852
5853         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5854             sizeof(struct sctp_tmit_chunk),
5855             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5856
5857         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5858             sizeof(struct sctp_queued_to_read),
5859             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5860
5861         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5862             sizeof(struct sctp_stream_queue_pending),
5863             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5864
5865         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5866             sizeof(struct sctp_asconf),
5867             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5868
5869         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5870             sizeof(struct sctp_asconf_ack),
5871             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5872
5873
5874         /* Master Lock INIT for info structure */
5875         SCTP_INP_INFO_LOCK_INIT();
5876         SCTP_STATLOG_INIT_LOCK();
5877
5878         SCTP_IPI_COUNT_INIT();
5879         SCTP_IPI_ADDR_INIT();
5880 #ifdef SCTP_PACKET_LOGGING
5881         SCTP_IP_PKTLOG_INIT();
5882 #endif
5883         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5884
5885         SCTP_WQ_ADDR_INIT();
5886         /* not sure if we need all the counts */
5887         SCTP_BASE_INFO(ipi_count_ep) = 0;
5888         /* assoc/tcb zone info */
5889         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5890         /* local addrlist zone info */
5891         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5892         /* remote addrlist zone info */
5893         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5894         /* chunk info */
5895         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5896
5897         /* socket queue zone info */
5898         SCTP_BASE_INFO(ipi_count_readq) = 0;
5899
5900         /* stream out queue cont */
5901         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5902
5903         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5904         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5905
5906         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5907
5908         /* Init the TIMEWAIT list */
5909         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5910                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5911         }
5912         sctp_startup_iterator();
5913
5914 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5915         sctp_startup_mcore_threads();
5916 #endif
5917
5918         /*
5919          * INIT the default VRF which for BSD is the only one, other O/S's
5920          * may have more. But initially they must start with one and then
5921          * add the VRF's as addresses are added.
5922          */
5923         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5924 }
5925
5926 /*
5927  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5928  */
5929 void
5930 sctp_pcb_finish(void)
5931 {
5932         struct sctp_vrflist *vrf_bucket;
5933         struct sctp_vrf *vrf, *nvrf;
5934         struct sctp_ifn *ifn, *nifn;
5935         struct sctp_ifa *ifa, *nifa;
5936         struct sctpvtaghead *chain;
5937         struct sctp_tagblock *twait_block, *prev_twait_block;
5938         struct sctp_laddr *wi, *nwi;
5939         int i;
5940         struct sctp_iterator *it, *nit;
5941
5942         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5943                 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5944                 return;
5945         }
5946         SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5947         /*
5948          * In FreeBSD the iterator thread never exits but we do clean up.
5949          * The only way FreeBSD reaches here is if we have VRF's but we
5950          * still add the ifdef to make it compile on old versions.
5951          */
5952 retry:
5953         SCTP_IPI_ITERATOR_WQ_LOCK();
5954         /*
5955          * sctp_iterator_worker() might be working on an it entry without
5956          * holding the lock.  We won't find it on the list either and
5957          * continue and free/destroy it.  While holding the lock, spin, to
5958          * avoid the race condition as sctp_iterator_worker() will have to
5959          * wait to re-aquire the lock.
5960          */
5961         if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5962                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5963                 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5964                     "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5965                 DELAY(10);
5966                 goto retry;
5967         }
5968         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5969                 if (it->vn != curvnet) {
5970                         continue;
5971                 }
5972                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5973                 if (it->function_atend != NULL) {
5974                         (*it->function_atend) (it->pointer, it->val);
5975                 }
5976                 SCTP_FREE(it, SCTP_M_ITER);
5977         }
5978         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5979         SCTP_ITERATOR_LOCK();
5980         if ((sctp_it_ctl.cur_it) &&
5981             (sctp_it_ctl.cur_it->vn == curvnet)) {
5982                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5983         }
5984         SCTP_ITERATOR_UNLOCK();
5985         SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5986         SCTP_WQ_ADDR_LOCK();
5987         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5988                 LIST_REMOVE(wi, sctp_nxt_addr);
5989                 SCTP_DECR_LADDR_COUNT();
5990                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5991                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
5992                 }
5993                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5994         }
5995         SCTP_WQ_ADDR_UNLOCK();
5996
5997         /*
5998          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5999          * destroyed first).
6000          */
6001         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
6002         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
6003                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
6004                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
6005                                 /* free the ifa */
6006                                 LIST_REMOVE(ifa, next_bucket);
6007                                 LIST_REMOVE(ifa, next_ifa);
6008                                 SCTP_FREE(ifa, SCTP_M_IFA);
6009                         }
6010                         /* free the ifn */
6011                         LIST_REMOVE(ifn, next_bucket);
6012                         LIST_REMOVE(ifn, next_ifn);
6013                         SCTP_FREE(ifn, SCTP_M_IFN);
6014                 }
6015                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
6016                 /* free the vrf */
6017                 LIST_REMOVE(vrf, next_vrf);
6018                 SCTP_FREE(vrf, SCTP_M_VRF);
6019         }
6020         /* free the vrf hashes */
6021         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
6022         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
6023
6024         /*
6025          * free the TIMEWAIT list elements malloc'd in the function
6026          * sctp_add_vtag_to_timewait()...
6027          */
6028         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6029                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
6030                 if (!LIST_EMPTY(chain)) {
6031                         prev_twait_block = NULL;
6032                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6033                                 if (prev_twait_block) {
6034                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6035                                 }
6036                                 prev_twait_block = twait_block;
6037                         }
6038                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6039                 }
6040         }
6041
6042         /* free the locks and mutexes */
6043 #ifdef SCTP_PACKET_LOGGING
6044         SCTP_IP_PKTLOG_DESTROY();
6045 #endif
6046         SCTP_IPI_ADDR_DESTROY();
6047         SCTP_STATLOG_DESTROY();
6048         SCTP_INP_INFO_LOCK_DESTROY();
6049
6050         SCTP_WQ_ADDR_DESTROY();
6051
6052         /* Get rid of other stuff too. */
6053         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6054                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6055         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6056                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6057         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6058                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6059
6060         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6061         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6062         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6063         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6064         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6065         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6066         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6067         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6068         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6069 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6070         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6071 #endif
6072 }
6073
6074
6075 int
6076 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6077     int offset, int limit,
6078     struct sockaddr *src, struct sockaddr *dst,
6079     struct sockaddr *altsa, uint16_t port)
6080 {
6081         /*
6082          * grub through the INIT pulling addresses and loading them to the
6083          * nets structure in the asoc. The from address in the mbuf should
6084          * also be loaded (if it is not already). This routine can be called
6085          * with either INIT or INIT-ACK's as long as the m points to the IP
6086          * packet and the offset points to the beginning of the parameters.
6087          */
6088         struct sctp_inpcb *inp;
6089         struct sctp_nets *net, *nnet, *net_tmp;
6090         struct sctp_paramhdr *phdr, param_buf;
6091         struct sctp_tcb *stcb_tmp;
6092         uint16_t ptype, plen;
6093         struct sockaddr *sa;
6094         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6095         struct sctp_auth_random *p_random = NULL;
6096         uint16_t random_len = 0;
6097         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6098         struct sctp_auth_hmac_algo *hmacs = NULL;
6099         uint16_t hmacs_len = 0;
6100         uint8_t saw_asconf = 0;
6101         uint8_t saw_asconf_ack = 0;
6102         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6103         struct sctp_auth_chunk_list *chunks = NULL;
6104         uint16_t num_chunks = 0;
6105         sctp_key_t *new_key;
6106         uint32_t keylen;
6107         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6108         uint8_t peer_supports_ecn;
6109         uint8_t peer_supports_prsctp;
6110         uint8_t peer_supports_auth;
6111         uint8_t peer_supports_asconf;
6112         uint8_t peer_supports_asconf_ack;
6113         uint8_t peer_supports_reconfig;
6114         uint8_t peer_supports_nrsack;
6115         uint8_t peer_supports_pktdrop;
6116         uint8_t peer_supports_idata;
6117 #ifdef INET
6118         struct sockaddr_in sin;
6119 #endif
6120 #ifdef INET6
6121         struct sockaddr_in6 sin6;
6122 #endif
6123
6124         /* First get the destination address setup too. */
6125 #ifdef INET
6126         memset(&sin, 0, sizeof(sin));
6127         sin.sin_family = AF_INET;
6128         sin.sin_len = sizeof(sin);
6129         sin.sin_port = stcb->rport;
6130 #endif
6131 #ifdef INET6
6132         memset(&sin6, 0, sizeof(sin6));
6133         sin6.sin6_family = AF_INET6;
6134         sin6.sin6_len = sizeof(struct sockaddr_in6);
6135         sin6.sin6_port = stcb->rport;
6136 #endif
6137         if (altsa) {
6138                 sa = altsa;
6139         } else {
6140                 sa = src;
6141         }
6142         peer_supports_idata = 0;
6143         peer_supports_ecn = 0;
6144         peer_supports_prsctp = 0;
6145         peer_supports_auth = 0;
6146         peer_supports_asconf = 0;
6147         peer_supports_reconfig = 0;
6148         peer_supports_nrsack = 0;
6149         peer_supports_pktdrop = 0;
6150         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6151                 /* mark all addresses that we have currently on the list */
6152                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6153         }
6154         /* does the source address already exist? if so skip it */
6155         inp = stcb->sctp_ep;
6156         atomic_add_int(&stcb->asoc.refcnt, 1);
6157         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6158         atomic_add_int(&stcb->asoc.refcnt, -1);
6159
6160         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6161                 /* we must add the source address */
6162                 /* no scope set here since we have a tcb already. */
6163                 switch (sa->sa_family) {
6164 #ifdef INET
6165                 case AF_INET:
6166                         if (stcb->asoc.scope.ipv4_addr_legal) {
6167                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6168                                         return (-1);
6169                                 }
6170                         }
6171                         break;
6172 #endif
6173 #ifdef INET6
6174                 case AF_INET6:
6175                         if (stcb->asoc.scope.ipv6_addr_legal) {
6176                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6177                                         return (-2);
6178                                 }
6179                         }
6180                         break;
6181 #endif
6182                 default:
6183                         break;
6184                 }
6185         } else {
6186                 if (net_tmp != NULL && stcb_tmp == stcb) {
6187                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6188                 } else if (stcb_tmp != stcb) {
6189                         /* It belongs to another association? */
6190                         if (stcb_tmp)
6191                                 SCTP_TCB_UNLOCK(stcb_tmp);
6192                         return (-3);
6193                 }
6194         }
6195         if (stcb->asoc.state == 0) {
6196                 /* the assoc was freed? */
6197                 return (-4);
6198         }
6199         /* now we must go through each of the params. */
6200         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
6201         while (phdr) {
6202                 ptype = ntohs(phdr->param_type);
6203                 plen = ntohs(phdr->param_length);
6204                 /*
6205                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6206                  * (uint32_t)ptype, (int)plen);
6207                  */
6208                 if (offset + plen > limit) {
6209                         break;
6210                 }
6211                 if (plen == 0) {
6212                         break;
6213                 }
6214 #ifdef INET
6215                 if (ptype == SCTP_IPV4_ADDRESS) {
6216                         if (stcb->asoc.scope.ipv4_addr_legal) {
6217                                 struct sctp_ipv4addr_param *p4, p4_buf;
6218
6219                                 /* ok get the v4 address and check/add */
6220                                 phdr = sctp_get_next_param(m, offset,
6221                                     (struct sctp_paramhdr *)&p4_buf,
6222                                     sizeof(p4_buf));
6223                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6224                                     phdr == NULL) {
6225                                         return (-5);
6226                                 }
6227                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6228                                 sin.sin_addr.s_addr = p4->addr;
6229                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6230                                         /* Skip multi-cast addresses */
6231                                         goto next_param;
6232                                 }
6233                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6234                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6235                                         goto next_param;
6236                                 }
6237                                 sa = (struct sockaddr *)&sin;
6238                                 inp = stcb->sctp_ep;
6239                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6240                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6241                                     dst, stcb);
6242                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6243
6244                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6245                                     inp == NULL) {
6246                                         /* we must add the source address */
6247                                         /*
6248                                          * no scope set since we have a tcb
6249                                          * already
6250                                          */
6251
6252                                         /*
6253                                          * we must validate the state again
6254                                          * here
6255                                          */
6256                         add_it_now:
6257                                         if (stcb->asoc.state == 0) {
6258                                                 /* the assoc was freed? */
6259                                                 return (-7);
6260                                         }
6261                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6262                                                 return (-8);
6263                                         }
6264                                 } else if (stcb_tmp == stcb) {
6265                                         if (stcb->asoc.state == 0) {
6266                                                 /* the assoc was freed? */
6267                                                 return (-10);
6268                                         }
6269                                         if (net != NULL) {
6270                                                 /* clear flag */
6271                                                 net->dest_state &=
6272                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6273                                         }
6274                                 } else {
6275                                         /*
6276                                          * strange, address is in another
6277                                          * assoc? straighten out locks.
6278                                          */
6279                                         if (stcb_tmp) {
6280                                                 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6281                                                         struct mbuf *op_err;
6282                                                         char msg[SCTP_DIAG_INFO_LEN];
6283
6284                                                         /*
6285                                                          * in setup state we
6286                                                          * abort this guy
6287                                                          */
6288                                                         snprintf(msg, sizeof(msg),
6289                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6290                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6291                                                             msg);
6292                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6293                                                             stcb_tmp, op_err,
6294                                                             SCTP_SO_NOT_LOCKED);
6295                                                         goto add_it_now;
6296                                                 }
6297                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6298                                         }
6299
6300                                         if (stcb->asoc.state == 0) {
6301                                                 /* the assoc was freed? */
6302                                                 return (-12);
6303                                         }
6304                                         return (-13);
6305                                 }
6306                         }
6307                 } else
6308 #endif
6309 #ifdef INET6
6310                 if (ptype == SCTP_IPV6_ADDRESS) {
6311                         if (stcb->asoc.scope.ipv6_addr_legal) {
6312                                 /* ok get the v6 address and check/add */
6313                                 struct sctp_ipv6addr_param *p6, p6_buf;
6314
6315                                 phdr = sctp_get_next_param(m, offset,
6316                                     (struct sctp_paramhdr *)&p6_buf,
6317                                     sizeof(p6_buf));
6318                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6319                                     phdr == NULL) {
6320                                         return (-14);
6321                                 }
6322                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6323                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6324                                     sizeof(p6->addr));
6325                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6326                                         /* Skip multi-cast addresses */
6327                                         goto next_param;
6328                                 }
6329                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6330                                         /*
6331                                          * Link local make no sense without
6332                                          * scope
6333                                          */
6334                                         goto next_param;
6335                                 }
6336                                 sa = (struct sockaddr *)&sin6;
6337                                 inp = stcb->sctp_ep;
6338                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6339                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6340                                     dst, stcb);
6341                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6342                                 if (stcb_tmp == NULL &&
6343                                     (inp == stcb->sctp_ep || inp == NULL)) {
6344                                         /*
6345                                          * we must validate the state again
6346                                          * here
6347                                          */
6348                         add_it_now6:
6349                                         if (stcb->asoc.state == 0) {
6350                                                 /* the assoc was freed? */
6351                                                 return (-16);
6352                                         }
6353                                         /*
6354                                          * we must add the address, no scope
6355                                          * set
6356                                          */
6357                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6358                                                 return (-17);
6359                                         }
6360                                 } else if (stcb_tmp == stcb) {
6361                                         /*
6362                                          * we must validate the state again
6363                                          * here
6364                                          */
6365                                         if (stcb->asoc.state == 0) {
6366                                                 /* the assoc was freed? */
6367                                                 return (-19);
6368                                         }
6369                                         if (net != NULL) {
6370                                                 /* clear flag */
6371                                                 net->dest_state &=
6372                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6373                                         }
6374                                 } else {
6375                                         /*
6376                                          * strange, address is in another
6377                                          * assoc? straighten out locks.
6378                                          */
6379                                         if (stcb_tmp) {
6380                                                 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6381                                                         struct mbuf *op_err;
6382                                                         char msg[SCTP_DIAG_INFO_LEN];
6383
6384                                                         /*
6385                                                          * in setup state we
6386                                                          * abort this guy
6387                                                          */
6388                                                         snprintf(msg, sizeof(msg),
6389                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6390                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6391                                                             msg);
6392                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6393                                                             stcb_tmp, op_err,
6394                                                             SCTP_SO_NOT_LOCKED);
6395                                                         goto add_it_now6;
6396                                                 }
6397                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6398                                         }
6399                                         if (stcb->asoc.state == 0) {
6400                                                 /* the assoc was freed? */
6401                                                 return (-21);
6402                                         }
6403                                         return (-22);
6404                                 }
6405                         }
6406                 } else
6407 #endif
6408                 if (ptype == SCTP_ECN_CAPABLE) {
6409                         peer_supports_ecn = 1;
6410                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6411                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6412                                 struct sctp_adaptation_layer_indication ai,
6413                                                                 *aip;
6414
6415                                 phdr = sctp_get_next_param(m, offset,
6416                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6417                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6418                                 if (aip) {
6419                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6420                                         stcb->asoc.adaptation_needed = 1;
6421                                 }
6422                         }
6423                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6424                         struct sctp_asconf_addr_param lstore, *fee;
6425                         int lptype;
6426                         struct sockaddr *lsa = NULL;
6427 #ifdef INET
6428                         struct sctp_asconf_addrv4_param *fii;
6429 #endif
6430
6431                         if (stcb->asoc.asconf_supported == 0) {
6432                                 return (-100);
6433                         }
6434                         if (plen > sizeof(lstore)) {
6435                                 return (-23);
6436                         }
6437                         phdr = sctp_get_next_param(m, offset,
6438                             (struct sctp_paramhdr *)&lstore,
6439                             plen);
6440                         if (phdr == NULL) {
6441                                 return (-24);
6442                         }
6443                         fee = (struct sctp_asconf_addr_param *)phdr;
6444                         lptype = ntohs(fee->addrp.ph.param_type);
6445                         switch (lptype) {
6446 #ifdef INET
6447                         case SCTP_IPV4_ADDRESS:
6448                                 if (plen !=
6449                                     sizeof(struct sctp_asconf_addrv4_param)) {
6450                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6451                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6452                                             plen);
6453                                 } else {
6454                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6455                                         sin.sin_addr.s_addr = fii->addrp.addr;
6456                                         lsa = (struct sockaddr *)&sin;
6457                                 }
6458                                 break;
6459 #endif
6460 #ifdef INET6
6461                         case SCTP_IPV6_ADDRESS:
6462                                 if (plen !=
6463                                     sizeof(struct sctp_asconf_addr_param)) {
6464                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6465                                             (int)sizeof(struct sctp_asconf_addr_param),
6466                                             plen);
6467                                 } else {
6468                                         memcpy(sin6.sin6_addr.s6_addr,
6469                                             fee->addrp.addr,
6470                                             sizeof(fee->addrp.addr));
6471                                         lsa = (struct sockaddr *)&sin6;
6472                                 }
6473                                 break;
6474 #endif
6475                         default:
6476                                 break;
6477                         }
6478                         if (lsa) {
6479                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6480                         }
6481                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6482                         stcb->asoc.peer_supports_nat = 1;
6483                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6484                         /* Peer supports pr-sctp */
6485                         peer_supports_prsctp = 1;
6486                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6487                         /* A supported extension chunk */
6488                         struct sctp_supported_chunk_types_param *pr_supported;
6489                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6490                         int num_ent, i;
6491
6492                         if (plen > sizeof(local_store)) {
6493                                 return (-35);
6494                         }
6495                         phdr = sctp_get_next_param(m, offset,
6496                             (struct sctp_paramhdr *)&local_store, plen);
6497                         if (phdr == NULL) {
6498                                 return (-25);
6499                         }
6500                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6501                         num_ent = plen - sizeof(struct sctp_paramhdr);
6502                         for (i = 0; i < num_ent; i++) {
6503                                 switch (pr_supported->chunk_types[i]) {
6504                                 case SCTP_ASCONF:
6505                                         peer_supports_asconf = 1;
6506                                         break;
6507                                 case SCTP_ASCONF_ACK:
6508                                         peer_supports_asconf_ack = 1;
6509                                         break;
6510                                 case SCTP_FORWARD_CUM_TSN:
6511                                         peer_supports_prsctp = 1;
6512                                         break;
6513                                 case SCTP_PACKET_DROPPED:
6514                                         peer_supports_pktdrop = 1;
6515                                         break;
6516                                 case SCTP_NR_SELECTIVE_ACK:
6517                                         peer_supports_nrsack = 1;
6518                                         break;
6519                                 case SCTP_STREAM_RESET:
6520                                         peer_supports_reconfig = 1;
6521                                         break;
6522                                 case SCTP_AUTHENTICATION:
6523                                         peer_supports_auth = 1;
6524                                         break;
6525                                 case SCTP_IDATA:
6526                                         peer_supports_idata = 1;
6527                                         break;
6528                                 default:
6529                                         /* one I have not learned yet */
6530                                         break;
6531
6532                                 }
6533                         }
6534                 } else if (ptype == SCTP_RANDOM) {
6535                         if (plen > sizeof(random_store))
6536                                 break;
6537                         if (got_random) {
6538                                 /* already processed a RANDOM */
6539                                 goto next_param;
6540                         }
6541                         phdr = sctp_get_next_param(m, offset,
6542                             (struct sctp_paramhdr *)random_store,
6543                             plen);
6544                         if (phdr == NULL)
6545                                 return (-26);
6546                         p_random = (struct sctp_auth_random *)phdr;
6547                         random_len = plen - sizeof(*p_random);
6548                         /* enforce the random length */
6549                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6550                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6551                                 return (-27);
6552                         }
6553                         got_random = 1;
6554                 } else if (ptype == SCTP_HMAC_LIST) {
6555                         uint16_t num_hmacs;
6556                         uint16_t i;
6557
6558                         if (plen > sizeof(hmacs_store))
6559                                 break;
6560                         if (got_hmacs) {
6561                                 /* already processed a HMAC list */
6562                                 goto next_param;
6563                         }
6564                         phdr = sctp_get_next_param(m, offset,
6565                             (struct sctp_paramhdr *)hmacs_store,
6566                             plen);
6567                         if (phdr == NULL)
6568                                 return (-28);
6569                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6570                         hmacs_len = plen - sizeof(*hmacs);
6571                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6572                         /* validate the hmac list */
6573                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6574                                 return (-29);
6575                         }
6576                         if (stcb->asoc.peer_hmacs != NULL)
6577                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6578                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6579                         if (stcb->asoc.peer_hmacs != NULL) {
6580                                 for (i = 0; i < num_hmacs; i++) {
6581                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6582                                             ntohs(hmacs->hmac_ids[i]));
6583                                 }
6584                         }
6585                         got_hmacs = 1;
6586                 } else if (ptype == SCTP_CHUNK_LIST) {
6587                         int i;
6588
6589                         if (plen > sizeof(chunks_store))
6590                                 break;
6591                         if (got_chklist) {
6592                                 /* already processed a Chunks list */
6593                                 goto next_param;
6594                         }
6595                         phdr = sctp_get_next_param(m, offset,
6596                             (struct sctp_paramhdr *)chunks_store,
6597                             plen);
6598                         if (phdr == NULL)
6599                                 return (-30);
6600                         chunks = (struct sctp_auth_chunk_list *)phdr;
6601                         num_chunks = plen - sizeof(*chunks);
6602                         if (stcb->asoc.peer_auth_chunks != NULL)
6603                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6604                         else
6605                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6606                         for (i = 0; i < num_chunks; i++) {
6607                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6608                                     stcb->asoc.peer_auth_chunks);
6609                                 /* record asconf/asconf-ack if listed */
6610                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6611                                         saw_asconf = 1;
6612                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6613                                         saw_asconf_ack = 1;
6614
6615                         }
6616                         got_chklist = 1;
6617                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6618                             (ptype == SCTP_STATE_COOKIE) ||
6619                             (ptype == SCTP_UNRECOG_PARAM) ||
6620                             (ptype == SCTP_COOKIE_PRESERVE) ||
6621                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6622                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6623                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6624                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6625                     (ptype == SCTP_SUCCESS_REPORT)) {
6626                          /* don't care */ ;
6627                 } else {
6628                         if ((ptype & 0x8000) == 0x0000) {
6629                                 /*
6630                                  * must stop processing the rest of the
6631                                  * param's. Any report bits were handled
6632                                  * with the call to
6633                                  * sctp_arethere_unrecognized_parameters()
6634                                  * when the INIT or INIT-ACK was first seen.
6635                                  */
6636                                 break;
6637                         }
6638                 }
6639
6640 next_param:
6641                 offset += SCTP_SIZE32(plen);
6642                 if (offset >= limit) {
6643                         break;
6644                 }
6645                 phdr = sctp_get_next_param(m, offset, &param_buf,
6646                     sizeof(param_buf));
6647         }
6648         /* Now check to see if we need to purge any addresses */
6649         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6650                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6651                     SCTP_ADDR_NOT_IN_ASSOC) {
6652                         /* This address has been removed from the asoc */
6653                         /* remove and free it */
6654                         stcb->asoc.numnets--;
6655                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6656                         sctp_free_remote_addr(net);
6657                         if (net == stcb->asoc.primary_destination) {
6658                                 stcb->asoc.primary_destination = NULL;
6659                                 sctp_select_primary_destination(stcb);
6660                         }
6661                 }
6662         }
6663         if ((stcb->asoc.ecn_supported == 1) &&
6664             (peer_supports_ecn == 0)) {
6665                 stcb->asoc.ecn_supported = 0;
6666         }
6667         if ((stcb->asoc.prsctp_supported == 1) &&
6668             (peer_supports_prsctp == 0)) {
6669                 stcb->asoc.prsctp_supported = 0;
6670         }
6671         if ((stcb->asoc.auth_supported == 1) &&
6672             ((peer_supports_auth == 0) ||
6673             (got_random == 0) || (got_hmacs == 0))) {
6674                 stcb->asoc.auth_supported = 0;
6675         }
6676         if ((stcb->asoc.asconf_supported == 1) &&
6677             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6678             (stcb->asoc.auth_supported == 0) ||
6679             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6680                 stcb->asoc.asconf_supported = 0;
6681         }
6682         if ((stcb->asoc.reconfig_supported == 1) &&
6683             (peer_supports_reconfig == 0)) {
6684                 stcb->asoc.reconfig_supported = 0;
6685         }
6686         if ((stcb->asoc.idata_supported == 1) &&
6687             (peer_supports_idata == 0)) {
6688                 stcb->asoc.idata_supported = 0;
6689         }
6690         if ((stcb->asoc.nrsack_supported == 1) &&
6691             (peer_supports_nrsack == 0)) {
6692                 stcb->asoc.nrsack_supported = 0;
6693         }
6694         if ((stcb->asoc.pktdrop_supported == 1) &&
6695             (peer_supports_pktdrop == 0)) {
6696                 stcb->asoc.pktdrop_supported = 0;
6697         }
6698         /* validate authentication required parameters */
6699         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6700                 /* peer does not support auth but sent a chunks list? */
6701                 return (-31);
6702         }
6703         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6704                 /* peer supports asconf but not auth? */
6705                 return (-32);
6706         } else if ((peer_supports_asconf == 1) &&
6707                     (peer_supports_auth == 1) &&
6708             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6709                 return (-33);
6710         }
6711         /* concatenate the full random key */
6712         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6713         if (chunks != NULL) {
6714                 keylen += sizeof(*chunks) + num_chunks;
6715         }
6716         new_key = sctp_alloc_key(keylen);
6717         if (new_key != NULL) {
6718                 /* copy in the RANDOM */
6719                 if (p_random != NULL) {
6720                         keylen = sizeof(*p_random) + random_len;
6721                         memcpy(new_key->key, p_random, keylen);
6722                 } else {
6723                         keylen = 0;
6724                 }
6725                 /* append in the AUTH chunks */
6726                 if (chunks != NULL) {
6727                         memcpy(new_key->key + keylen, chunks,
6728                             sizeof(*chunks) + num_chunks);
6729                         keylen += sizeof(*chunks) + num_chunks;
6730                 }
6731                 /* append in the HMACs */
6732                 if (hmacs != NULL) {
6733                         memcpy(new_key->key + keylen, hmacs,
6734                             sizeof(*hmacs) + hmacs_len);
6735                 }
6736         } else {
6737                 /* failed to get memory for the key */
6738                 return (-34);
6739         }
6740         if (stcb->asoc.authinfo.peer_random != NULL)
6741                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6742         stcb->asoc.authinfo.peer_random = new_key;
6743         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6744         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6745
6746         return (0);
6747 }
6748
6749 int
6750 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6751     struct sctp_nets *net)
6752 {
6753         /* make sure the requested primary address exists in the assoc */
6754         if (net == NULL && sa)
6755                 net = sctp_findnet(stcb, sa);
6756
6757         if (net == NULL) {
6758                 /* didn't find the requested primary address! */
6759                 return (-1);
6760         } else {
6761                 /* set the primary address */
6762                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6763                         /* Must be confirmed, so queue to set */
6764                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6765                         return (0);
6766                 }
6767                 stcb->asoc.primary_destination = net;
6768                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6769                         sctp_free_remote_addr(stcb->asoc.alternate);
6770                         stcb->asoc.alternate = NULL;
6771                 }
6772                 net = TAILQ_FIRST(&stcb->asoc.nets);
6773                 if (net != stcb->asoc.primary_destination) {
6774                         /*
6775                          * first one on the list is NOT the primary
6776                          * sctp_cmpaddr() is much more efficient if the
6777                          * primary is the first on the list, make it so.
6778                          */
6779                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6780                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6781                 }
6782                 return (0);
6783         }
6784 }
6785
6786 int
6787 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6788 {
6789         /*
6790          * This function serves two purposes. It will see if a TAG can be
6791          * re-used and return 1 for yes it is ok and 0 for don't use that
6792          * tag. A secondary function it will do is purge out old tags that
6793          * can be removed.
6794          */
6795         struct sctpvtaghead *chain;
6796         struct sctp_tagblock *twait_block;
6797         struct sctpasochead *head;
6798         struct sctp_tcb *stcb;
6799         int i;
6800
6801         SCTP_INP_INFO_RLOCK();
6802         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6803             SCTP_BASE_INFO(hashasocmark))];
6804         LIST_FOREACH(stcb, head, sctp_asocs) {
6805                 /*
6806                  * We choose not to lock anything here. TCB's can't be
6807                  * removed since we have the read lock, so they can't be
6808                  * freed on us, same thing for the INP. I may be wrong with
6809                  * this assumption, but we will go with it for now :-)
6810                  */
6811                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6812                         continue;
6813                 }
6814                 if (stcb->asoc.my_vtag == tag) {
6815                         /* candidate */
6816                         if (stcb->rport != rport) {
6817                                 continue;
6818                         }
6819                         if (stcb->sctp_ep->sctp_lport != lport) {
6820                                 continue;
6821                         }
6822                         /* Its a used tag set */
6823                         SCTP_INP_INFO_RUNLOCK();
6824                         return (0);
6825                 }
6826         }
6827         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6828         /* Now what about timed wait ? */
6829         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6830                 /*
6831                  * Block(s) are present, lets see if we have this tag in the
6832                  * list
6833                  */
6834                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6835                         if (twait_block->vtag_block[i].v_tag == 0) {
6836                                 /* not used */
6837                                 continue;
6838                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6839                             now->tv_sec) {
6840                                 /* Audit expires this guy */
6841                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6842                                 twait_block->vtag_block[i].v_tag = 0;
6843                                 twait_block->vtag_block[i].lport = 0;
6844                                 twait_block->vtag_block[i].rport = 0;
6845                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6846                                     (twait_block->vtag_block[i].lport == lport) &&
6847                             (twait_block->vtag_block[i].rport == rport)) {
6848                                 /* Bad tag, sorry :< */
6849                                 SCTP_INP_INFO_RUNLOCK();
6850                                 return (0);
6851                         }
6852                 }
6853         }
6854         SCTP_INP_INFO_RUNLOCK();
6855         return (1);
6856 }
6857
6858 static void
6859 sctp_drain_mbufs(struct sctp_tcb *stcb)
6860 {
6861         /*
6862          * We must hunt this association for MBUF's past the cumack (i.e.
6863          * out of order data that we can renege on).
6864          */
6865         struct sctp_association *asoc;
6866         struct sctp_tmit_chunk *chk, *nchk;
6867         uint32_t cumulative_tsn_p1;
6868         struct sctp_queued_to_read *control, *ncontrol;
6869         int cnt, strmat;
6870         uint32_t gap, i;
6871         int fnd = 0;
6872
6873         /* We look for anything larger than the cum-ack + 1 */
6874
6875         asoc = &stcb->asoc;
6876         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6877                 /* none we can reneg on. */
6878                 return;
6879         }
6880         SCTP_STAT_INCR(sctps_protocol_drains_done);
6881         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6882         cnt = 0;
6883         /* Ok that was fun, now we will drain all the inbound streams? */
6884         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6885                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) {
6886 #ifdef INVARIANTS
6887                         if (control->on_strm_q != SCTP_ON_ORDERED) {
6888                                 panic("Huh control: %p on_q: %d -- not ordered?",
6889                                     control, control->on_strm_q);
6890                         }
6891 #endif
6892                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6893                                 /* Yep it is above cum-ack */
6894                                 cnt++;
6895                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6896                                 KASSERT(control->length > 0, ("control has zero length"));
6897                                 if (asoc->size_on_all_streams >= control->length) {
6898                                         asoc->size_on_all_streams -= control->length;
6899                                 } else {
6900 #ifdef INVARIANTS
6901                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6902 #else
6903                                         asoc->size_on_all_streams = 0;
6904 #endif
6905                                 }
6906                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6907                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6908                                 if (control->on_read_q) {
6909                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6910                                         control->on_read_q = 0;
6911                                 }
6912                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm);
6913                                 control->on_strm_q = 0;
6914                                 if (control->data) {
6915                                         sctp_m_freem(control->data);
6916                                         control->data = NULL;
6917                                 }
6918                                 sctp_free_remote_addr(control->whoFrom);
6919                                 /* Now its reasm? */
6920                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6921                                         cnt++;
6922                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6923                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6924                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6925                                                 asoc->size_on_reasm_queue -= chk->send_size;
6926                                         } else {
6927 #ifdef INVARIANTS
6928                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6929 #else
6930                                                 asoc->size_on_reasm_queue = 0;
6931 #endif
6932                                         }
6933                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6934                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6935                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6936                                         if (chk->data) {
6937                                                 sctp_m_freem(chk->data);
6938                                                 chk->data = NULL;
6939                                         }
6940                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6941                                 }
6942                                 sctp_free_a_readq(stcb, control);
6943                         }
6944                 }
6945                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) {
6946 #ifdef INVARIANTS
6947                         if (control->on_strm_q != SCTP_ON_UNORDERED) {
6948                                 panic("Huh control: %p on_q: %d -- not unordered?",
6949                                     control, control->on_strm_q);
6950                         }
6951 #endif
6952                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6953                                 /* Yep it is above cum-ack */
6954                                 cnt++;
6955                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6956                                 KASSERT(control->length > 0, ("control has zero length"));
6957                                 if (asoc->size_on_all_streams >= control->length) {
6958                                         asoc->size_on_all_streams -= control->length;
6959                                 } else {
6960 #ifdef INVARIANTS
6961                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6962 #else
6963                                         asoc->size_on_all_streams = 0;
6964 #endif
6965                                 }
6966                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6967                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6968                                 if (control->on_read_q) {
6969                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6970                                         control->on_read_q = 0;
6971                                 }
6972                                 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm);
6973                                 control->on_strm_q = 0;
6974                                 if (control->data) {
6975                                         sctp_m_freem(control->data);
6976                                         control->data = NULL;
6977                                 }
6978                                 sctp_free_remote_addr(control->whoFrom);
6979                                 /* Now its reasm? */
6980                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6981                                         cnt++;
6982                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6983                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6984                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6985                                                 asoc->size_on_reasm_queue -= chk->send_size;
6986                                         } else {
6987 #ifdef INVARIANTS
6988                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6989 #else
6990                                                 asoc->size_on_reasm_queue = 0;
6991 #endif
6992                                         }
6993                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6994                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6995                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6996                                         if (chk->data) {
6997                                                 sctp_m_freem(chk->data);
6998                                                 chk->data = NULL;
6999                                         }
7000                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
7001                                 }
7002                                 sctp_free_a_readq(stcb, control);
7003                         }
7004                 }
7005         }
7006         if (cnt) {
7007                 /* We must back down to see what the new highest is */
7008                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
7009                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
7010                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
7011                                 asoc->highest_tsn_inside_map = i;
7012                                 fnd = 1;
7013                                 break;
7014                         }
7015                 }
7016                 if (!fnd) {
7017                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
7018                 }
7019
7020                 /*
7021                  * Question, should we go through the delivery queue? The
7022                  * only reason things are on here is the app not reading OR
7023                  * a p-d-api up. An attacker COULD send enough in to
7024                  * initiate the PD-API and then send a bunch of stuff to
7025                  * other streams... these would wind up on the delivery
7026                  * queue.. and then we would not get to them. But in order
7027                  * to do this I then have to back-track and un-deliver
7028                  * sequence numbers in streams.. el-yucko. I think for now
7029                  * we will NOT look at the delivery queue and leave it to be
7030                  * something to consider later. An alternative would be to
7031                  * abort the P-D-API with a notification and then deliver
7032                  * the data.... Or another method might be to keep track of
7033                  * how many times the situation occurs and if we see a
7034                  * possible attack underway just abort the association.
7035                  */
7036 #ifdef SCTP_DEBUG
7037                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
7038 #endif
7039                 /*
7040                  * Now do we need to find a new
7041                  * asoc->highest_tsn_inside_map?
7042                  */
7043                 asoc->last_revoke_count = cnt;
7044                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
7045                 /* sa_ignore NO_NULL_CHK */
7046                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
7047                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
7048         }
7049         /*
7050          * Another issue, in un-setting the TSN's in the mapping array we
7051          * DID NOT adjust the highest_tsn marker.  This will cause one of
7052          * two things to occur. It may cause us to do extra work in checking
7053          * for our mapping array movement. More importantly it may cause us
7054          * to SACK every datagram. This may not be a bad thing though since
7055          * we will recover once we get our cum-ack above and all this stuff
7056          * we dumped recovered.
7057          */
7058 }
7059
7060 void
7061 sctp_drain()
7062 {
7063         /*
7064          * We must walk the PCB lists for ALL associations here. The system
7065          * is LOW on MBUF's and needs help. This is where reneging will
7066          * occur. We really hope this does NOT happen!
7067          */
7068         VNET_ITERATOR_DECL(vnet_iter);
7069         VNET_LIST_RLOCK_NOSLEEP();
7070         VNET_FOREACH(vnet_iter) {
7071                 CURVNET_SET(vnet_iter);
7072                 struct sctp_inpcb *inp;
7073                 struct sctp_tcb *stcb;
7074
7075                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
7076                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7077 #ifdef VIMAGE
7078                         continue;
7079 #else
7080                         return;
7081 #endif
7082                 }
7083                 SCTP_INP_INFO_RLOCK();
7084                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7085                         /* For each endpoint */
7086                         SCTP_INP_RLOCK(inp);
7087                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7088                                 /* For each association */
7089                                 SCTP_TCB_LOCK(stcb);
7090                                 sctp_drain_mbufs(stcb);
7091                                 SCTP_TCB_UNLOCK(stcb);
7092                         }
7093                         SCTP_INP_RUNLOCK(inp);
7094                 }
7095                 SCTP_INP_INFO_RUNLOCK();
7096                 CURVNET_RESTORE();
7097         }
7098         VNET_LIST_RUNLOCK_NOSLEEP();
7099 }
7100
7101 /*
7102  * start a new iterator
7103  * iterates through all endpoints and associations based on the pcb_state
7104  * flags and asoc_state.  "af" (mandatory) is executed for all matching
7105  * assocs and "ef" (optional) is executed when the iterator completes.
7106  * "inpf" (optional) is executed for each new endpoint as it is being
7107  * iterated through. inpe (optional) is called when the inp completes
7108  * its way through all the stcbs.
7109  */
7110 int
7111 sctp_initiate_iterator(inp_func inpf,
7112     asoc_func af,
7113     inp_func inpe,
7114     uint32_t pcb_state,
7115     uint32_t pcb_features,
7116     uint32_t asoc_state,
7117     void *argp,
7118     uint32_t argi,
7119     end_func ef,
7120     struct sctp_inpcb *s_inp,
7121     uint8_t chunk_output_off)
7122 {
7123         struct sctp_iterator *it = NULL;
7124
7125         if (af == NULL) {
7126                 return (-1);
7127         }
7128         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7129                 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7130                     SCTP_BASE_VAR(sctp_pcb_initialized));
7131                 return (-1);
7132         }
7133         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7134             SCTP_M_ITER);
7135         if (it == NULL) {
7136                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7137                 return (ENOMEM);
7138         }
7139         memset(it, 0, sizeof(*it));
7140         it->function_assoc = af;
7141         it->function_inp = inpf;
7142         if (inpf)
7143                 it->done_current_ep = 0;
7144         else
7145                 it->done_current_ep = 1;
7146         it->function_atend = ef;
7147         it->pointer = argp;
7148         it->val = argi;
7149         it->pcb_flags = pcb_state;
7150         it->pcb_features = pcb_features;
7151         it->asoc_state = asoc_state;
7152         it->function_inp_end = inpe;
7153         it->no_chunk_output = chunk_output_off;
7154         it->vn = curvnet;
7155         if (s_inp) {
7156                 /* Assume lock is held here */
7157                 it->inp = s_inp;
7158                 SCTP_INP_INCR_REF(it->inp);
7159                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7160         } else {
7161                 SCTP_INP_INFO_RLOCK();
7162                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7163                 if (it->inp) {
7164                         SCTP_INP_INCR_REF(it->inp);
7165                 }
7166                 SCTP_INP_INFO_RUNLOCK();
7167                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7168
7169         }
7170         SCTP_IPI_ITERATOR_WQ_LOCK();
7171         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7172                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7173                 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7174                     SCTP_BASE_VAR(sctp_pcb_initialized), it);
7175                 SCTP_FREE(it, SCTP_M_ITER);
7176                 return (-1);
7177         }
7178         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7179         if (sctp_it_ctl.iterator_running == 0) {
7180                 sctp_wakeup_iterator();
7181         }
7182         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7183         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7184         return (0);
7185 }