sys/netinet/sctp_pcb.c

   1 /*-
   2  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
   3  * Copyright (c) 2008-2011, by Randall Stewart. All rights reserved.
   4  * Copyright (c) 2008-2011, 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 /* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $     */
  34
  35 #include <sys/cdefs.h>
  36 __FBSDID("$FreeBSD$");
  37
  38 #include <netinet/sctp_os.h>
  39 #include <sys/proc.h>
  40 #include <netinet/sctp_var.h>
  41 #include <netinet/sctp_sysctl.h>
  42 #include <netinet/sctp_pcb.h>
  43 #include <netinet/sctputil.h>
  44 #include <netinet/sctp.h>
  45 #include <netinet/sctp_header.h>
  46 #include <netinet/sctp_asconf.h>
  47 #include <netinet/sctp_output.h>
  48 #include <netinet/sctp_timer.h>
  49 #include <netinet/sctp_bsd_addr.h>
  50 #include <netinet/sctp_dtrace_define.h>
  51 #include <netinet/udp.h>
  52 #include <sys/sched.h>
  53 #include <sys/smp.h>
  54 #include <sys/unistd.h>
  55
  56
  57 VNET_DEFINE(struct sctp_base_info, system_base_info);
  58
  59 /* FIX: we don't handle multiple link local scopes */
  60 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  61 #ifdef INET6
  62 int
  63 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  64 {
  65         struct sockaddr_in6 tmp_a, tmp_b;
  66
  67         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  68         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  69                 return 0;
  70         }
  71         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  72         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  73                 return 0;
  74         }
  75         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  76 }
  77
  78 #endif
  79
  80 void
  81 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  82 {
  83         /*
  84          * We really don't need to lock this, but I will just because it
  85          * does not hurt.
  86          */
  87         SCTP_INP_INFO_RLOCK();
  88         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  89         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  90         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  91         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  92         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  93         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  94         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  95         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
  96
  97         SCTP_INP_INFO_RUNLOCK();
  98 }
  99
 100 /*
 101  * Addresses are added to VRF's (Virtual Router's). For BSD we
 102  * have only the default VRF 0. We maintain a hash list of
 103  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
 104  * these has a list of addresses. When we add a new address
 105  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 106  * not exist we create it and add it to the list of IFN's
 107  * within the VRF. Once we have the sctp_ifn, we add the
 108  * address to the list. So we look something like:
 109  *
 110  * hash-vrf-table
 111  *   vrf-> ifn-> ifn -> ifn
 112  *   vrf    |
 113  *    ...   +--ifa-> ifa -> ifa
 114  *   vrf
 115  *
 116  * We keep these separate lists since the SCTP subsystem will
 117  * point to these from its source address selection nets structure.
 118  * When an address is deleted it does not happen right away on
 119  * the SCTP side, it gets scheduled. What we do when a
 120  * delete happens is immediately remove the address from
 121  * the master list and decrement the refcount. As our
 122  * addip iterator works through and frees the src address
 123  * selection pointing to the sctp_ifa, eventually the refcount
 124  * will reach 0 and we will delete it. Note that it is assumed
 125  * that any locking on system level ifn/ifa is done at the
 126  * caller of these functions and these routines will only
 127  * lock the SCTP structures as they add or delete things.
 128  *
 129  * Other notes on VRF concepts.
 130  *  - An endpoint can be in multiple VRF's
 131  *  - An association lives within a VRF and only one VRF.
 132  *  - Any incoming packet we can deduce the VRF for by
 133  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 134  *  - Any downward send call or connect call must supply the
 135  *    VRF via ancillary data or via some sort of set default
 136  *    VRF socket option call (again for BSD no brainer since
 137  *    the VRF is always 0).
 138  *  - An endpoint may add multiple VRF's to it.
 139  *  - Listening sockets can accept associations in any
 140  *    of the VRF's they are in but the assoc will end up
 141  *    in only one VRF (gotten from the packet or connect/send).
 142  *
 143  */
 144
 145 struct sctp_vrf *
 146 sctp_allocate_vrf(int vrf_id)
 147 {
 148         struct sctp_vrf *vrf = NULL;
 149         struct sctp_vrflist *bucket;
 150
 151         /* First allocate the VRF structure */
 152         vrf = sctp_find_vrf(vrf_id);
 153         if (vrf) {
 154                 /* Already allocated */
 155                 return (vrf);
 156         }
 157         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 158             SCTP_M_VRF);
 159         if (vrf == NULL) {
 160                 /* No memory */
 161 #ifdef INVARIANTS
 162                 panic("No memory for VRF:%d", vrf_id);
 163 #endif
 164                 return (NULL);
 165         }
 166         /* setup the VRF */
 167         memset(vrf, 0, sizeof(struct sctp_vrf));
 168         vrf->vrf_id = vrf_id;
 169         LIST_INIT(&vrf->ifnlist);
 170         vrf->total_ifa_count = 0;
 171         vrf->refcount = 0;
 172         /* now also setup table ids */
 173         SCTP_INIT_VRF_TABLEID(vrf);
 174         /* Init the HASH of addresses */
 175         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 176             &vrf->vrf_addr_hashmark);
 177         if (vrf->vrf_addr_hash == NULL) {
 178                 /* No memory */
 179 #ifdef INVARIANTS
 180                 panic("No memory for VRF:%d", vrf_id);
 181 #endif
 182                 SCTP_FREE(vrf, SCTP_M_VRF);
 183                 return (NULL);
 184         }
 185         /* Add it to the hash table */
 186         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 187         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 188         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 189         return (vrf);
 190 }
 191
 192
 193 struct sctp_ifn *
 194 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 195 {
 196         struct sctp_ifn *sctp_ifnp;
 197         struct sctp_ifnlist *hash_ifn_head;
 198
 199         /*
 200          * We assume the lock is held for the addresses if that's wrong
 201          * problems could occur :-)
 202          */
 203         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 204         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 205                 if (sctp_ifnp->ifn_index == ifn_index) {
 206                         return (sctp_ifnp);
 207                 }
 208                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 209                         return (sctp_ifnp);
 210                 }
 211         }
 212         return (NULL);
 213 }
 214
 215
 216
 217 struct sctp_vrf *
 218 sctp_find_vrf(uint32_t vrf_id)
 219 {
 220         struct sctp_vrflist *bucket;
 221         struct sctp_vrf *liste;
 222
 223         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 224         LIST_FOREACH(liste, bucket, next_vrf) {
 225                 if (vrf_id == liste->vrf_id) {
 226                         return (liste);
 227                 }
 228         }
 229         return (NULL);
 230 }
 231
 232 void
 233 sctp_free_vrf(struct sctp_vrf *vrf)
 234 {
 235         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 236                 if (vrf->vrf_addr_hash) {
 237                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 238                         vrf->vrf_addr_hash = NULL;
 239                 }
 240                 /* We zero'd the count */
 241                 LIST_REMOVE(vrf, next_vrf);
 242                 SCTP_FREE(vrf, SCTP_M_VRF);
 243                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 244         }
 245 }
 246
 247 void
 248 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 249 {
 250         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 251                 /* We zero'd the count */
 252                 if (sctp_ifnp->vrf) {
 253                         sctp_free_vrf(sctp_ifnp->vrf);
 254                 }
 255                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 256                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 257         }
 258 }
 259
 260 void
 261 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 262 {
 263         struct sctp_ifn *sctp_ifnp;
 264
 265         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 266         if (sctp_ifnp != NULL) {
 267                 sctp_ifnp->ifn_mtu = mtu;
 268         }
 269 }
 270
 271
 272 void
 273 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 274 {
 275         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 276                 /* We zero'd the count */
 277                 if (sctp_ifap->ifn_p) {
 278                         sctp_free_ifn(sctp_ifap->ifn_p);
 279                 }
 280                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 281                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 282         }
 283 }
 284
 285 static void
 286 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 287 {
 288         struct sctp_ifn *found;
 289
 290         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 291         if (found == NULL) {
 292                 /* Not in the list.. sorry */
 293                 return;
 294         }
 295         if (hold_addr_lock == 0)
 296                 SCTP_IPI_ADDR_WLOCK();
 297         LIST_REMOVE(sctp_ifnp, next_bucket);
 298         LIST_REMOVE(sctp_ifnp, next_ifn);
 299         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 300             sctp_ifnp->registered_af);
 301         if (hold_addr_lock == 0)
 302                 SCTP_IPI_ADDR_WUNLOCK();
 303         /* Take away the reference, and possibly free it */
 304         sctp_free_ifn(sctp_ifnp);
 305 }
 306
 307 void
 308 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 309     const char *if_name, uint32_t ifn_index)
 310 {
 311         struct sctp_vrf *vrf;
 312         struct sctp_ifa *sctp_ifap = NULL;
 313
 314         SCTP_IPI_ADDR_RLOCK();
 315         vrf = sctp_find_vrf(vrf_id);
 316         if (vrf == NULL) {
 317                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 318                 goto out;
 319
 320         }
 321         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 322         if (sctp_ifap == NULL) {
 323                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 324                 goto out;
 325         }
 326         if (sctp_ifap->ifn_p == NULL) {
 327                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 328                 goto out;
 329         }
 330         if (if_name) {
 331                 int len1, len2;
 332
 333                 len1 = strlen(if_name);
 334                 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
 335                 if (len1 != len2) {
 336                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different length %d vs %d - ignored\n",
 337                             len1, len2);
 338                         goto out;
 339                 }
 340                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
 341                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 342                             sctp_ifap->ifn_p->ifn_name,
 343                             if_name);
 344                         goto out;
 345                 }
 346         } else {
 347                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 348                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 349                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 350                         goto out;
 351                 }
 352         }
 353
 354         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 355         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 356 out:
 357         SCTP_IPI_ADDR_RUNLOCK();
 358 }
 359
 360 void
 361 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 362     const char *if_name, uint32_t ifn_index)
 363 {
 364         struct sctp_vrf *vrf;
 365         struct sctp_ifa *sctp_ifap = NULL;
 366
 367         SCTP_IPI_ADDR_RLOCK();
 368         vrf = sctp_find_vrf(vrf_id);
 369         if (vrf == NULL) {
 370                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 371                 goto out;
 372
 373         }
 374         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 375         if (sctp_ifap == NULL) {
 376                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 377                 goto out;
 378         }
 379         if (sctp_ifap->ifn_p == NULL) {
 380                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 381                 goto out;
 382         }
 383         if (if_name) {
 384                 int len1, len2;
 385
 386                 len1 = strlen(if_name);
 387                 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
 388                 if (len1 != len2) {
 389                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different length %d vs %d - ignored\n",
 390                             len1, len2);
 391                         goto out;
 392                 }
 393                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
 394                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 395                             sctp_ifap->ifn_p->ifn_name,
 396                             if_name);
 397                         goto out;
 398                 }
 399         } else {
 400                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 401                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 402                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 403                         goto out;
 404                 }
 405         }
 406
 407         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 408         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 409 out:
 410         SCTP_IPI_ADDR_RUNLOCK();
 411 }
 412
 413 /*-
 414  * Add an ifa to an ifn.
 415  * Register the interface as necessary.
 416  * NOTE: ADDR write lock MUST be held.
 417  */
 418 static void
 419 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 420 {
 421         int ifa_af;
 422
 423         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 424         sctp_ifap->ifn_p = sctp_ifnp;
 425         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 426         /* update address counts */
 427         sctp_ifnp->ifa_count++;
 428         ifa_af = sctp_ifap->address.sa.sa_family;
 429         if (ifa_af == AF_INET)
 430                 sctp_ifnp->num_v4++;
 431         else
 432                 sctp_ifnp->num_v6++;
 433         if (sctp_ifnp->ifa_count == 1) {
 434                 /* register the new interface */
 435                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 436                 sctp_ifnp->registered_af = ifa_af;
 437         }
 438 }
 439
 440 /*-
 441  * Remove an ifa from its ifn.
 442  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 443  * the interface based on the remaining address families left.
 444  * NOTE: ADDR write lock MUST be held.
 445  */
 446 static void
 447 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 448 {
 449         uint32_t ifn_index;
 450
 451         LIST_REMOVE(sctp_ifap, next_ifa);
 452         if (sctp_ifap->ifn_p) {
 453                 /* update address counts */
 454                 sctp_ifap->ifn_p->ifa_count--;
 455                 if (sctp_ifap->address.sa.sa_family == AF_INET6)
 456                         sctp_ifap->ifn_p->num_v6--;
 457                 else if (sctp_ifap->address.sa.sa_family == AF_INET)
 458                         sctp_ifap->ifn_p->num_v4--;
 459
 460                 ifn_index = sctp_ifap->ifn_p->ifn_index;
 461                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 462                         /* remove the ifn, possibly freeing it */
 463                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 464                 } else {
 465                         /* re-register address family type, if needed */
 466                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 467                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 468                                 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET6);
 469                                 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET);
 470                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 471                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 472                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 473                                 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET);
 474                                 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET6);
 475                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 476                         }
 477                         /* free the ifn refcount */
 478                         sctp_free_ifn(sctp_ifap->ifn_p);
 479                 }
 480                 sctp_ifap->ifn_p = NULL;
 481         }
 482 }
 483
 484 struct sctp_ifa *
 485 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 486     uint32_t ifn_type, const char *if_name, void *ifa,
 487     struct sockaddr *addr, uint32_t ifa_flags,
 488     int dynamic_add)
 489 {
 490         struct sctp_vrf *vrf;
 491         struct sctp_ifn *sctp_ifnp = NULL;
 492         struct sctp_ifa *sctp_ifap = NULL;
 493         struct sctp_ifalist *hash_addr_head;
 494         struct sctp_ifnlist *hash_ifn_head;
 495         uint32_t hash_of_addr;
 496         int new_ifn_af = 0;
 497
 498 #ifdef SCTP_DEBUG
 499         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 500         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 501 #endif
 502         SCTP_IPI_ADDR_WLOCK();
 503         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 504         if (sctp_ifnp) {
 505                 vrf = sctp_ifnp->vrf;
 506         } else {
 507                 vrf = sctp_find_vrf(vrf_id);
 508                 if (vrf == NULL) {
 509                         vrf = sctp_allocate_vrf(vrf_id);
 510                         if (vrf == NULL) {
 511                                 SCTP_IPI_ADDR_WUNLOCK();
 512                                 return (NULL);
 513                         }
 514                 }
 515         }
 516         if (sctp_ifnp == NULL) {
 517                 /*
 518                  * build one and add it, can't hold lock until after malloc
 519                  * done though.
 520                  */
 521                 SCTP_IPI_ADDR_WUNLOCK();
 522                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 523                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 524                 if (sctp_ifnp == NULL) {
 525 #ifdef INVARIANTS
 526                         panic("No memory for IFN");
 527 #endif
 528                         return (NULL);
 529                 }
 530                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 531                 sctp_ifnp->ifn_index = ifn_index;
 532                 sctp_ifnp->ifn_p = ifn;
 533                 sctp_ifnp->ifn_type = ifn_type;
 534                 sctp_ifnp->refcount = 0;
 535                 sctp_ifnp->vrf = vrf;
 536                 atomic_add_int(&vrf->refcount, 1);
 537                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 538                 if (if_name != NULL) {
 539                         memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ);
 540                 } else {
 541                         memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ));
 542                 }
 543                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 544                 LIST_INIT(&sctp_ifnp->ifalist);
 545                 SCTP_IPI_ADDR_WLOCK();
 546                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 547                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 548                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 549                 new_ifn_af = 1;
 550         }
 551         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 552         if (sctp_ifap) {
 553                 /* Hmm, it already exists? */
 554                 if ((sctp_ifap->ifn_p) &&
 555                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 556                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 557                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 558                             sctp_ifap);
 559                         if (new_ifn_af) {
 560                                 /* Remove the created one that we don't want */
 561                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 562                         }
 563                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 564                                 /* easy to solve, just switch back to active */
 565                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 566                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 567                                 sctp_ifap->ifn_p = sctp_ifnp;
 568                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 569                         }
 570         exit_stage_left:
 571                         SCTP_IPI_ADDR_WUNLOCK();
 572                         return (sctp_ifap);
 573                 } else {
 574                         if (sctp_ifap->ifn_p) {
 575                                 /*
 576                                  * The last IFN gets the address, remove the
 577                                  * old one
 578                                  */
 579                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 580                                     sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 581                                     sctp_ifap->ifn_p->ifn_index, if_name,
 582                                     ifn_index);
 583                                 /* remove the address from the old ifn */
 584                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 585                                 /* move the address over to the new ifn */
 586                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 587                                 goto exit_stage_left;
 588                         } else {
 589                                 /* repair ifnp which was NULL ? */
 590                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 591                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 592                                     sctp_ifnp, sctp_ifap);
 593                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 594                         }
 595                         goto exit_stage_left;
 596                 }
 597         }
 598         SCTP_IPI_ADDR_WUNLOCK();
 599         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 600         if (sctp_ifap == NULL) {
 601 #ifdef INVARIANTS
 602                 panic("No memory for IFA");
 603 #endif
 604                 return (NULL);
 605         }
 606         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 607         sctp_ifap->ifn_p = sctp_ifnp;
 608         atomic_add_int(&sctp_ifnp->refcount, 1);
 609         sctp_ifap->vrf_id = vrf_id;
 610         sctp_ifap->ifa = ifa;
 611         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 612         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 613         sctp_ifap->flags = ifa_flags;
 614         /* Set scope */
 615         switch (sctp_ifap->address.sa.sa_family) {
 616         case AF_INET:
 617                 {
 618                         struct sockaddr_in *sin;
 619
 620                         sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
 621                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 622                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 623                                 sctp_ifap->src_is_loop = 1;
 624                         }
 625                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 626                                 sctp_ifap->src_is_priv = 1;
 627                         }
 628                         sctp_ifnp->num_v4++;
 629                         if (new_ifn_af)
 630                                 new_ifn_af = AF_INET;
 631                         break;
 632                 }
 633 #ifdef INET6
 634         case AF_INET6:
 635                 {
 636                         /* ok to use deprecated addresses? */
 637                         struct sockaddr_in6 *sin6;
 638
 639                         sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
 640                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 641                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 642                                 sctp_ifap->src_is_loop = 1;
 643                         }
 644                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 645                                 sctp_ifap->src_is_priv = 1;
 646                         }
 647                         sctp_ifnp->num_v6++;
 648                         if (new_ifn_af)
 649                                 new_ifn_af = AF_INET6;
 650                         break;
 651                 }
 652 #endif
 653         default:
 654                 new_ifn_af = 0;
 655                 break;
 656         }
 657         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 658
 659         if ((sctp_ifap->src_is_priv == 0) &&
 660             (sctp_ifap->src_is_loop == 0)) {
 661                 sctp_ifap->src_is_glob = 1;
 662         }
 663         SCTP_IPI_ADDR_WLOCK();
 664         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 665         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 666         sctp_ifap->refcount = 1;
 667         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 668         sctp_ifnp->ifa_count++;
 669         vrf->total_ifa_count++;
 670         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 671         if (new_ifn_af) {
 672                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 673                 sctp_ifnp->registered_af = new_ifn_af;
 674         }
 675         SCTP_IPI_ADDR_WUNLOCK();
 676         if (dynamic_add) {
 677                 /*
 678                  * Bump up the refcount so that when the timer completes it
 679                  * will drop back down.
 680                  */
 681                 struct sctp_laddr *wi;
 682
 683                 atomic_add_int(&sctp_ifap->refcount, 1);
 684                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 685                 if (wi == NULL) {
 686                         /*
 687                          * Gak, what can we do? We have lost an address
 688                          * change can you say HOSED?
 689                          */
 690                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 691                         /* Opps, must decrement the count */
 692                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 693                             if_name);
 694                         return (NULL);
 695                 }
 696                 SCTP_INCR_LADDR_COUNT();
 697                 bzero(wi, sizeof(*wi));
 698                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 699                 wi->ifa = sctp_ifap;
 700                 wi->action = SCTP_ADD_IP_ADDRESS;
 701
 702                 SCTP_WQ_ADDR_LOCK();
 703                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 704                 SCTP_WQ_ADDR_UNLOCK();
 705
 706                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 707                     (struct sctp_inpcb *)NULL,
 708                     (struct sctp_tcb *)NULL,
 709                     (struct sctp_nets *)NULL);
 710         } else {
 711                 /* it's ready for use */
 712                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 713         }
 714         return (sctp_ifap);
 715 }
 716
 717 void
 718 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 719     uint32_t ifn_index, const char *if_name)
 720 {
 721         struct sctp_vrf *vrf;
 722         struct sctp_ifa *sctp_ifap = NULL;
 723
 724         SCTP_IPI_ADDR_WLOCK();
 725         vrf = sctp_find_vrf(vrf_id);
 726         if (vrf == NULL) {
 727                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 728                 goto out_now;
 729         }
 730 #ifdef SCTP_DEBUG
 731         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 732         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 733 #endif
 734         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 735         if (sctp_ifap) {
 736                 /* Validate the delete */
 737                 if (sctp_ifap->ifn_p) {
 738                         int valid = 0;
 739
 740                         /*-
 741                          * The name has priority over the ifn_index
 742                          * if its given. We do this especially for
 743                          * panda who might recycle indexes fast.
 744                          */
 745                         if (if_name) {
 746                                 int len1, len2;
 747
 748                                 len1 = min(SCTP_IFNAMSIZ, strlen(if_name));
 749                                 len2 = min(SCTP_IFNAMSIZ, strlen(sctp_ifap->ifn_p->ifn_name));
 750                                 if (len1 && len2 && (len1 == len2)) {
 751                                         /* we can compare them */
 752                                         if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) == 0) {
 753                                                 /*
 754                                                  * They match its a correct
 755                                                  * delete
 756                                                  */
 757                                                 valid = 1;
 758                                         }
 759                                 }
 760                         }
 761                         if (!valid) {
 762                                 /* last ditch check ifn_index */
 763                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 764                                         valid = 1;
 765                                 }
 766                         }
 767                         if (!valid) {
 768                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 769                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 770                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 771                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 772                                 SCTP_IPI_ADDR_WUNLOCK();
 773                                 return;
 774                         }
 775                 }
 776                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap);
 777                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 778                 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
 779                 vrf->total_ifa_count--;
 780                 LIST_REMOVE(sctp_ifap, next_bucket);
 781                 sctp_remove_ifa_from_ifn(sctp_ifap);
 782         }
 783 #ifdef SCTP_DEBUG
 784         else {
 785                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 786                     ifn_index);
 787                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 788         }
 789 #endif
 790
 791 out_now:
 792         SCTP_IPI_ADDR_WUNLOCK();
 793         if (sctp_ifap) {
 794                 struct sctp_laddr *wi;
 795
 796                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 797                 if (wi == NULL) {
 798                         /*
 799                          * Gak, what can we do? We have lost an address
 800                          * change can you say HOSED?
 801                          */
 802                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 803
 804                         /* Oops, must decrement the count */
 805                         sctp_free_ifa(sctp_ifap);
 806                         return;
 807                 }
 808                 SCTP_INCR_LADDR_COUNT();
 809                 bzero(wi, sizeof(*wi));
 810                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 811                 wi->ifa = sctp_ifap;
 812                 wi->action = SCTP_DEL_IP_ADDRESS;
 813                 SCTP_WQ_ADDR_LOCK();
 814                 /*
 815                  * Should this really be a tailq? As it is we will process
 816                  * the newest first :-0
 817                  */
 818                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 819                 SCTP_WQ_ADDR_UNLOCK();
 820
 821                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 822                     (struct sctp_inpcb *)NULL,
 823                     (struct sctp_tcb *)NULL,
 824                     (struct sctp_nets *)NULL);
 825         }
 826         return;
 827 }
 828
 829
 830 static struct sctp_tcb *
 831 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 832     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
 833 {
 834         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
 835         /*
 836          * If we support the TCP model, then we must now dig through to see
 837          * if we can find our endpoint in the list of tcp ep's.
 838          */
 839         uint16_t lport, rport;
 840         struct sctppcbhead *ephead;
 841         struct sctp_inpcb *inp;
 842         struct sctp_laddr *laddr;
 843         struct sctp_tcb *stcb;
 844         struct sctp_nets *net;
 845
 846         if ((to == NULL) || (from == NULL)) {
 847                 return (NULL);
 848         }
 849         if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
 850                 lport = ((struct sockaddr_in *)to)->sin_port;
 851                 rport = ((struct sockaddr_in *)from)->sin_port;
 852         } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
 853                 lport = ((struct sockaddr_in6 *)to)->sin6_port;
 854                 rport = ((struct sockaddr_in6 *)from)->sin6_port;
 855         } else {
 856                 return NULL;
 857         }
 858         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
 859         /*
 860          * Ok now for each of the guys in this bucket we must look and see:
 861          * - Does the remote port match. - Does there single association's
 862          * addresses match this address (to). If so we update p_ep to point
 863          * to this ep and return the tcb from it.
 864          */
 865         LIST_FOREACH(inp, ephead, sctp_hash) {
 866                 SCTP_INP_RLOCK(inp);
 867                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 868                         SCTP_INP_RUNLOCK(inp);
 869                         continue;
 870                 }
 871                 if (lport != inp->sctp_lport) {
 872                         SCTP_INP_RUNLOCK(inp);
 873                         continue;
 874                 }
 875                 if (inp->def_vrf_id != vrf_id) {
 876                         SCTP_INP_RUNLOCK(inp);
 877                         continue;
 878                 }
 879                 /* check to see if the ep has one of the addresses */
 880                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 881                         /* We are NOT bound all, so look further */
 882                         int match = 0;
 883
 884                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 885
 886                                 if (laddr->ifa == NULL) {
 887                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
 888                                         continue;
 889                                 }
 890                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 891                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 892                                         continue;
 893                                 }
 894                                 if (laddr->ifa->address.sa.sa_family ==
 895                                     to->sa_family) {
 896                                         /* see if it matches */
 897                                         struct sockaddr_in *intf_addr, *sin;
 898
 899                                         intf_addr = &laddr->ifa->address.sin;
 900                                         sin = (struct sockaddr_in *)to;
 901                                         if (from->sa_family == AF_INET) {
 902                                                 if (sin->sin_addr.s_addr ==
 903                                                     intf_addr->sin_addr.s_addr) {
 904                                                         match = 1;
 905                                                         break;
 906                                                 }
 907                                         }
 908 #ifdef INET6
 909                                         if (from->sa_family == AF_INET6) {
 910                                                 struct sockaddr_in6 *intf_addr6;
 911                                                 struct sockaddr_in6 *sin6;
 912
 913                                                 sin6 = (struct sockaddr_in6 *)
 914                                                     to;
 915                                                 intf_addr6 = &laddr->ifa->address.sin6;
 916
 917                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
 918                                                     intf_addr6)) {
 919                                                         match = 1;
 920                                                         break;
 921                                                 }
 922                                         }
 923 #endif
 924                                 }
 925                         }
 926                         if (match == 0) {
 927                                 /* This endpoint does not have this address */
 928                                 SCTP_INP_RUNLOCK(inp);
 929                                 continue;
 930                         }
 931                 }
 932                 /*
 933                  * Ok if we hit here the ep has the address, does it hold
 934                  * the tcb?
 935                  */
 936
 937                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 938                 if (stcb == NULL) {
 939                         SCTP_INP_RUNLOCK(inp);
 940                         continue;
 941                 }
 942                 SCTP_TCB_LOCK(stcb);
 943                 if (stcb->rport != rport) {
 944                         /* remote port does not match. */
 945                         SCTP_TCB_UNLOCK(stcb);
 946                         SCTP_INP_RUNLOCK(inp);
 947                         continue;
 948                 }
 949                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 950                         SCTP_TCB_UNLOCK(stcb);
 951                         SCTP_INP_RUNLOCK(inp);
 952                         continue;
 953                 }
 954                 /* Does this TCB have a matching address? */
 955                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 956
 957                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
 958                                 /* not the same family, can't be a match */
 959                                 continue;
 960                         }
 961                         switch (from->sa_family) {
 962                         case AF_INET:
 963                                 {
 964                                         struct sockaddr_in *sin, *rsin;
 965
 966                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
 967                                         rsin = (struct sockaddr_in *)from;
 968                                         if (sin->sin_addr.s_addr ==
 969                                             rsin->sin_addr.s_addr) {
 970                                                 /* found it */
 971                                                 if (netp != NULL) {
 972                                                         *netp = net;
 973                                                 }
 974                                                 /*
 975                                                  * Update the endpoint
 976                                                  * pointer
 977                                                  */
 978                                                 *inp_p = inp;
 979                                                 SCTP_INP_RUNLOCK(inp);
 980                                                 return (stcb);
 981                                         }
 982                                         break;
 983                                 }
 984 #ifdef INET6
 985                         case AF_INET6:
 986                                 {
 987                                         struct sockaddr_in6 *sin6, *rsin6;
 988
 989                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 990                                         rsin6 = (struct sockaddr_in6 *)from;
 991                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
 992                                             rsin6)) {
 993                                                 /* found it */
 994                                                 if (netp != NULL) {
 995                                                         *netp = net;
 996                                                 }
 997                                                 /*
 998                                                  * Update the endpoint
 999                                                  * pointer
1000                                                  */
1001                                                 *inp_p = inp;
1002                                                 SCTP_INP_RUNLOCK(inp);
1003                                                 return (stcb);
1004                                         }
1005                                         break;
1006                                 }
1007 #endif
1008                         default:
1009                                 /* TSNH */
1010                                 break;
1011                         }
1012                 }
1013                 SCTP_TCB_UNLOCK(stcb);
1014                 SCTP_INP_RUNLOCK(inp);
1015         }
1016         return (NULL);
1017 }
1018
1019 static int
1020 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
1021 {
1022         int loopback_scope, ipv4_local_scope, local_scope, site_scope;
1023         int ipv4_addr_legal, ipv6_addr_legal;
1024         struct sctp_vrf *vrf;
1025         struct sctp_ifn *sctp_ifn;
1026         struct sctp_ifa *sctp_ifa;
1027
1028         loopback_scope = stcb->asoc.loopback_scope;
1029         ipv4_local_scope = stcb->asoc.ipv4_local_scope;
1030         local_scope = stcb->asoc.local_scope;
1031         site_scope = stcb->asoc.site_scope;
1032         ipv4_addr_legal = ipv6_addr_legal = 0;
1033         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1034                 ipv6_addr_legal = 1;
1035                 if (SCTP_IPV6_V6ONLY(stcb->sctp_ep) == 0) {
1036                         ipv4_addr_legal = 1;
1037                 }
1038         } else {
1039                 ipv4_addr_legal = 1;
1040         }
1041
1042         SCTP_IPI_ADDR_RLOCK();
1043         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
1044         if (vrf == NULL) {
1045                 /* no vrf, no addresses */
1046                 SCTP_IPI_ADDR_RUNLOCK();
1047                 return (0);
1048         }
1049         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
1050                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
1051                         if ((loopback_scope == 0) &&
1052                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
1053                                 continue;
1054                         }
1055                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
1056                                 if (sctp_is_addr_restricted(stcb, sctp_ifa))
1057                                         continue;
1058                                 switch (sctp_ifa->address.sa.sa_family) {
1059 #ifdef INET
1060                                 case AF_INET:
1061                                         if (ipv4_addr_legal) {
1062                                                 struct sockaddr_in *sin,
1063                                                            *rsin;
1064
1065                                                 sin = &sctp_ifa->address.sin;
1066                                                 rsin = (struct sockaddr_in *)to;
1067                                                 if ((ipv4_local_scope == 0) &&
1068                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
1069                                                         continue;
1070                                                 }
1071                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1072                                                         SCTP_IPI_ADDR_RUNLOCK();
1073                                                         return (1);
1074                                                 }
1075                                         }
1076                                         break;
1077 #endif
1078 #ifdef INET6
1079                                 case AF_INET6:
1080                                         if (ipv6_addr_legal) {
1081                                                 struct sockaddr_in6 *sin6,
1082                                                             *rsin6;
1083
1084                                                 sin6 = &sctp_ifa->address.sin6;
1085                                                 rsin6 = (struct sockaddr_in6 *)to;
1086                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1087                                                         if (local_scope == 0)
1088                                                                 continue;
1089                                                         if (sin6->sin6_scope_id == 0) {
1090                                                                 if (sa6_recoverscope(sin6) != 0)
1091                                                                         continue;
1092                                                         }
1093                                                 }
1094                                                 if ((site_scope == 0) &&
1095                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1096                                                         continue;
1097                                                 }
1098                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1099                                                         SCTP_IPI_ADDR_RUNLOCK();
1100                                                         return (1);
1101                                                 }
1102                                         }
1103                                         break;
1104 #endif
1105                                 default:
1106                                         /* TSNH */
1107                                         break;
1108                                 }
1109                         }
1110                 }
1111         } else {
1112                 struct sctp_laddr *laddr;
1113
1114                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
1115                         if (sctp_is_addr_restricted(stcb, laddr->ifa)) {
1116                                 continue;
1117                         }
1118                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
1119                                 continue;
1120                         }
1121                         switch (to->sa_family) {
1122 #ifdef INET
1123                         case AF_INET:
1124                                 {
1125                                         struct sockaddr_in *sin, *rsin;
1126
1127                                         sin = (struct sockaddr_in *)&laddr->ifa->address.sin;
1128                                         rsin = (struct sockaddr_in *)to;
1129                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1130                                                 SCTP_IPI_ADDR_RUNLOCK();
1131                                                 return (1);
1132                                         }
1133                                         break;
1134                                 }
1135 #endif
1136 #ifdef INET6
1137                         case AF_INET6:
1138                                 {
1139                                         struct sockaddr_in6 *sin6, *rsin6;
1140
1141                                         sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6;
1142                                         rsin6 = (struct sockaddr_in6 *)to;
1143                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1144                                                 SCTP_IPI_ADDR_RUNLOCK();
1145                                                 return (1);
1146                                         }
1147                                         break;
1148                                 }
1149
1150 #endif
1151                         default:
1152                                 /* TSNH */
1153                                 break;
1154                         }
1155
1156                 }
1157         }
1158         SCTP_IPI_ADDR_RUNLOCK();
1159         return (0);
1160 }
1161
1162 /*
1163  * rules for use
1164  *
1165  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1166  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1167  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1168  * NULL.
1169  */
1170
1171 struct sctp_tcb *
1172 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1173     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1174 {
1175         struct sctpasochead *head;
1176         struct sctp_inpcb *inp;
1177         struct sctp_tcb *stcb = NULL;
1178         struct sctp_nets *net;
1179         uint16_t rport;
1180
1181         inp = *inp_p;
1182         if (remote->sa_family == AF_INET) {
1183                 rport = (((struct sockaddr_in *)remote)->sin_port);
1184         } else if (remote->sa_family == AF_INET6) {
1185                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1186         } else {
1187                 return (NULL);
1188         }
1189         if (locked_tcb) {
1190                 /*
1191                  * UN-lock so we can do proper locking here this occurs when
1192                  * called from load_addresses_from_init.
1193                  */
1194                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1195                 SCTP_TCB_UNLOCK(locked_tcb);
1196         }
1197         SCTP_INP_INFO_RLOCK();
1198         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
1199                 /*-
1200                  * Now either this guy is our listener or it's the
1201                  * connector. If it is the one that issued the connect, then
1202                  * it's only chance is to be the first TCB in the list. If
1203                  * it is the acceptor, then do the special_lookup to hash
1204                  * and find the real inp.
1205                  */
1206                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1207                         /* to is peer addr, from is my addr */
1208                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1209                             netp, inp->def_vrf_id);
1210                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1211                                 /* we have a locked tcb, lower refcount */
1212                                 SCTP_INP_DECR_REF(inp);
1213                         }
1214                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1215                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1216                                 SCTP_TCB_LOCK(locked_tcb);
1217                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1218                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1219                         }
1220                         SCTP_INP_INFO_RUNLOCK();
1221                         return (stcb);
1222                 } else {
1223                         SCTP_INP_WLOCK(inp);
1224                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1225                                 goto null_return;
1226                         }
1227                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1228                         if (stcb == NULL) {
1229                                 goto null_return;
1230                         }
1231                         SCTP_TCB_LOCK(stcb);
1232
1233                         if (stcb->rport != rport) {
1234                                 /* remote port does not match. */
1235                                 SCTP_TCB_UNLOCK(stcb);
1236                                 goto null_return;
1237                         }
1238                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1239                                 SCTP_TCB_UNLOCK(stcb);
1240                                 goto null_return;
1241                         }
1242                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1243                                 SCTP_TCB_UNLOCK(stcb);
1244                                 goto null_return;
1245                         }
1246                         /* now look at the list of remote addresses */
1247                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1248 #ifdef INVARIANTS
1249                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1250                                         panic("Corrupt net list");
1251                                 }
1252 #endif
1253                                 if (net->ro._l_addr.sa.sa_family !=
1254                                     remote->sa_family) {
1255                                         /* not the same family */
1256                                         continue;
1257                                 }
1258                                 switch (remote->sa_family) {
1259                                 case AF_INET:
1260                                         {
1261                                                 struct sockaddr_in *sin,
1262                                                            *rsin;
1263
1264                                                 sin = (struct sockaddr_in *)
1265                                                     &net->ro._l_addr;
1266                                                 rsin = (struct sockaddr_in *)remote;
1267                                                 if (sin->sin_addr.s_addr ==
1268                                                     rsin->sin_addr.s_addr) {
1269                                                         /* found it */
1270                                                         if (netp != NULL) {
1271                                                                 *netp = net;
1272                                                         }
1273                                                         if (locked_tcb == NULL) {
1274                                                                 SCTP_INP_DECR_REF(inp);
1275                                                         } else if (locked_tcb != stcb) {
1276                                                                 SCTP_TCB_LOCK(locked_tcb);
1277                                                         }
1278                                                         if (locked_tcb) {
1279                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1280                                                         }
1281                                                         SCTP_INP_WUNLOCK(inp);
1282                                                         SCTP_INP_INFO_RUNLOCK();
1283                                                         return (stcb);
1284                                                 }
1285                                                 break;
1286                                         }
1287 #ifdef INET6
1288                                 case AF_INET6:
1289                                         {
1290                                                 struct sockaddr_in6 *sin6,
1291                                                             *rsin6;
1292
1293                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1294                                                 rsin6 = (struct sockaddr_in6 *)remote;
1295                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1296                                                     rsin6)) {
1297                                                         /* found it */
1298                                                         if (netp != NULL) {
1299                                                                 *netp = net;
1300                                                         }
1301                                                         if (locked_tcb == NULL) {
1302                                                                 SCTP_INP_DECR_REF(inp);
1303                                                         } else if (locked_tcb != stcb) {
1304                                                                 SCTP_TCB_LOCK(locked_tcb);
1305                                                         }
1306                                                         if (locked_tcb) {
1307                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1308                                                         }
1309                                                         SCTP_INP_WUNLOCK(inp);
1310                                                         SCTP_INP_INFO_RUNLOCK();
1311                                                         return (stcb);
1312                                                 }
1313                                                 break;
1314                                         }
1315 #endif
1316                                 default:
1317                                         /* TSNH */
1318                                         break;
1319                                 }
1320                         }
1321                         SCTP_TCB_UNLOCK(stcb);
1322                 }
1323         } else {
1324                 SCTP_INP_WLOCK(inp);
1325                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1326                         goto null_return;
1327                 }
1328                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1329                     inp->sctp_hashmark)];
1330                 if (head == NULL) {
1331                         goto null_return;
1332                 }
1333                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1334                         if (stcb->rport != rport) {
1335                                 /* remote port does not match */
1336                                 continue;
1337                         }
1338                         SCTP_TCB_LOCK(stcb);
1339                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1340                                 SCTP_TCB_UNLOCK(stcb);
1341                                 continue;
1342                         }
1343                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1344                                 SCTP_TCB_UNLOCK(stcb);
1345                                 continue;
1346                         }
1347                         /* now look at the list of remote addresses */
1348                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1349 #ifdef INVARIANTS
1350                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1351                                         panic("Corrupt net list");
1352                                 }
1353 #endif
1354                                 if (net->ro._l_addr.sa.sa_family !=
1355                                     remote->sa_family) {
1356                                         /* not the same family */
1357                                         continue;
1358                                 }
1359                                 switch (remote->sa_family) {
1360                                 case AF_INET:
1361                                         {
1362                                                 struct sockaddr_in *sin,
1363                                                            *rsin;
1364
1365                                                 sin = (struct sockaddr_in *)
1366                                                     &net->ro._l_addr;
1367                                                 rsin = (struct sockaddr_in *)remote;
1368                                                 if (sin->sin_addr.s_addr ==
1369                                                     rsin->sin_addr.s_addr) {
1370                                                         /* found it */
1371                                                         if (netp != NULL) {
1372                                                                 *netp = net;
1373                                                         }
1374                                                         if (locked_tcb == NULL) {
1375                                                                 SCTP_INP_DECR_REF(inp);
1376                                                         } else if (locked_tcb != stcb) {
1377                                                                 SCTP_TCB_LOCK(locked_tcb);
1378                                                         }
1379                                                         if (locked_tcb) {
1380                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1381                                                         }
1382                                                         SCTP_INP_WUNLOCK(inp);
1383                                                         SCTP_INP_INFO_RUNLOCK();
1384                                                         return (stcb);
1385                                                 }
1386                                                 break;
1387                                         }
1388 #ifdef INET6
1389                                 case AF_INET6:
1390                                         {
1391                                                 struct sockaddr_in6 *sin6,
1392                                                             *rsin6;
1393
1394                                                 sin6 = (struct sockaddr_in6 *)
1395                                                     &net->ro._l_addr;
1396                                                 rsin6 = (struct sockaddr_in6 *)remote;
1397                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1398                                                     rsin6)) {
1399                                                         /* found it */
1400                                                         if (netp != NULL) {
1401                                                                 *netp = net;
1402                                                         }
1403                                                         if (locked_tcb == NULL) {
1404                                                                 SCTP_INP_DECR_REF(inp);
1405                                                         } else if (locked_tcb != stcb) {
1406                                                                 SCTP_TCB_LOCK(locked_tcb);
1407                                                         }
1408                                                         if (locked_tcb) {
1409                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1410                                                         }
1411                                                         SCTP_INP_WUNLOCK(inp);
1412                                                         SCTP_INP_INFO_RUNLOCK();
1413                                                         return (stcb);
1414                                                 }
1415                                                 break;
1416                                         }
1417 #endif
1418                                 default:
1419                                         /* TSNH */
1420                                         break;
1421                                 }
1422                         }
1423                         SCTP_TCB_UNLOCK(stcb);
1424                 }
1425         }
1426 null_return:
1427         /* clean up for returning null */
1428         if (locked_tcb) {
1429                 SCTP_TCB_LOCK(locked_tcb);
1430                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1431         }
1432         SCTP_INP_WUNLOCK(inp);
1433         SCTP_INP_INFO_RUNLOCK();
1434         /* not found */
1435         return (NULL);
1436 }
1437
1438 /*
1439  * Find an association for a specific endpoint using the association id given
1440  * out in the COMM_UP notification
1441  */
1442
1443 struct sctp_tcb *
1444 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1445 {
1446         /*
1447          * Use my the assoc_id to find a endpoint
1448          */
1449         struct sctpasochead *head;
1450         struct sctp_tcb *stcb;
1451         uint32_t id;
1452
1453         if (inp == NULL) {
1454                 SCTP_PRINTF("TSNH ep_associd\n");
1455                 return (NULL);
1456         }
1457         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1458                 SCTP_PRINTF("TSNH ep_associd0\n");
1459                 return (NULL);
1460         }
1461         id = (uint32_t) asoc_id;
1462         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1463         if (head == NULL) {
1464                 /* invalid id TSNH */
1465                 SCTP_PRINTF("TSNH ep_associd1\n");
1466                 return (NULL);
1467         }
1468         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1469                 if (stcb->asoc.assoc_id == id) {
1470                         if (inp != stcb->sctp_ep) {
1471                                 /*
1472                                  * some other guy has the same id active (id
1473                                  * collision ??).
1474                                  */
1475                                 SCTP_PRINTF("TSNH ep_associd2\n");
1476                                 continue;
1477                         }
1478                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1479                                 continue;
1480                         }
1481                         if (want_lock) {
1482                                 SCTP_TCB_LOCK(stcb);
1483                         }
1484                         return (stcb);
1485                 }
1486         }
1487         return (NULL);
1488 }
1489
1490
1491 struct sctp_tcb *
1492 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1493 {
1494         struct sctp_tcb *stcb;
1495
1496         SCTP_INP_RLOCK(inp);
1497         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1498         SCTP_INP_RUNLOCK(inp);
1499         return (stcb);
1500 }
1501
1502
1503 static struct sctp_inpcb *
1504 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1505     uint16_t lport, uint32_t vrf_id)
1506 {
1507         struct sctp_inpcb *inp;
1508         struct sockaddr_in *sin;
1509
1510 #ifdef INET6
1511         struct sockaddr_in6 *sin6;
1512
1513 #endif
1514         struct sctp_laddr *laddr;
1515
1516 #ifdef INET6
1517         struct sockaddr_in6 *intf_addr6;
1518
1519 #endif
1520
1521         int fnd;
1522
1523         /*
1524          * Endpoint probe expects that the INP_INFO is locked.
1525          */
1526         sin = NULL;
1527 #ifdef INET6
1528         sin6 = NULL;
1529 #endif
1530         switch (nam->sa_family) {
1531         case AF_INET:
1532                 sin = (struct sockaddr_in *)nam;
1533                 break;
1534 #ifdef INET6
1535         case AF_INET6:
1536                 sin6 = (struct sockaddr_in6 *)nam;
1537                 break;
1538 #endif
1539         default:
1540                 /* unsupported family */
1541                 return (NULL);
1542         }
1543
1544         if (head == NULL)
1545                 return (NULL);
1546
1547         LIST_FOREACH(inp, head, sctp_hash) {
1548                 SCTP_INP_RLOCK(inp);
1549                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1550                         SCTP_INP_RUNLOCK(inp);
1551                         continue;
1552                 }
1553                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1554                     (inp->sctp_lport == lport)) {
1555                         /* got it */
1556                         if ((nam->sa_family == AF_INET) &&
1557                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1558                             SCTP_IPV6_V6ONLY(inp)) {
1559                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1560                                 SCTP_INP_RUNLOCK(inp);
1561                                 continue;
1562                         }
1563                         /* A V6 address and the endpoint is NOT bound V6 */
1564                         if (nam->sa_family == AF_INET6 &&
1565                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1566                                 SCTP_INP_RUNLOCK(inp);
1567                                 continue;
1568                         }
1569                         /* does a VRF id match? */
1570                         fnd = 0;
1571                         if (inp->def_vrf_id == vrf_id)
1572                                 fnd = 1;
1573
1574                         SCTP_INP_RUNLOCK(inp);
1575                         if (!fnd)
1576                                 continue;
1577                         return (inp);
1578                 }
1579                 SCTP_INP_RUNLOCK(inp);
1580         }
1581         if ((nam->sa_family == AF_INET) &&
1582             (sin->sin_addr.s_addr == INADDR_ANY)) {
1583                 /* Can't hunt for one that has no address specified */
1584                 return (NULL);
1585         }
1586 #ifdef INET6
1587         if ((nam->sa_family == AF_INET6) &&
1588             (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
1589                 /* Can't hunt for one that has no address specified */
1590                 return (NULL);
1591         }
1592 #endif
1593         /*
1594          * ok, not bound to all so see if we can find a EP bound to this
1595          * address.
1596          */
1597         LIST_FOREACH(inp, head, sctp_hash) {
1598                 SCTP_INP_RLOCK(inp);
1599                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1600                         SCTP_INP_RUNLOCK(inp);
1601                         continue;
1602                 }
1603                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1604                         SCTP_INP_RUNLOCK(inp);
1605                         continue;
1606                 }
1607                 /*
1608                  * Ok this could be a likely candidate, look at all of its
1609                  * addresses
1610                  */
1611                 if (inp->sctp_lport != lport) {
1612                         SCTP_INP_RUNLOCK(inp);
1613                         continue;
1614                 }
1615                 /* does a VRF id match? */
1616                 fnd = 0;
1617                 if (inp->def_vrf_id == vrf_id)
1618                         fnd = 1;
1619
1620                 if (!fnd) {
1621                         SCTP_INP_RUNLOCK(inp);
1622                         continue;
1623                 }
1624                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1625                         if (laddr->ifa == NULL) {
1626                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1627                                     __FUNCTION__);
1628                                 continue;
1629                         }
1630                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1631                             laddr->ifa);
1632                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1633                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1634                                 continue;
1635                         }
1636                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1637                                 /* possible, see if it matches */
1638                                 struct sockaddr_in *intf_addr;
1639
1640                                 intf_addr = &laddr->ifa->address.sin;
1641                                 switch (nam->sa_family) {
1642                                 case AF_INET:
1643                                         if (sin->sin_addr.s_addr ==
1644                                             intf_addr->sin_addr.s_addr) {
1645                                                 SCTP_INP_RUNLOCK(inp);
1646                                                 return (inp);
1647                                         }
1648                                         break;
1649 #ifdef INET6
1650                                 case AF_INET6:
1651                                         intf_addr6 = &laddr->ifa->address.sin6;
1652                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1653                                             intf_addr6)) {
1654                                                 SCTP_INP_RUNLOCK(inp);
1655                                                 return (inp);
1656                                         }
1657                                         break;
1658 #endif
1659                                 }
1660                         }
1661                 }
1662                 SCTP_INP_RUNLOCK(inp);
1663         }
1664         return (NULL);
1665 }
1666
1667
1668 static struct sctp_inpcb *
1669 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1670 {
1671         struct sctppcbhead *head;
1672         struct sctp_inpcb *t_inp;
1673         int fnd;
1674
1675         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1676             SCTP_BASE_INFO(hashmark))];
1677         LIST_FOREACH(t_inp, head, sctp_hash) {
1678                 if (t_inp->sctp_lport != lport) {
1679                         continue;
1680                 }
1681                 /* is it in the VRF in question */
1682                 fnd = 0;
1683                 if (t_inp->def_vrf_id == vrf_id)
1684                         fnd = 1;
1685                 if (!fnd)
1686                         continue;
1687
1688                 /* This one is in use. */
1689                 /* check the v6/v4 binding issue */
1690                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1691                     SCTP_IPV6_V6ONLY(t_inp)) {
1692                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1693                                 /* collision in V6 space */
1694                                 return (t_inp);
1695                         } else {
1696                                 /* inp is BOUND_V4 no conflict */
1697                                 continue;
1698                         }
1699                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1700                         /* t_inp is bound v4 and v6, conflict always */
1701                         return (t_inp);
1702                 } else {
1703                         /* t_inp is bound only V4 */
1704                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1705                             SCTP_IPV6_V6ONLY(inp)) {
1706                                 /* no conflict */
1707                                 continue;
1708                         }
1709                         /* else fall through to conflict */
1710                 }
1711                 return (t_inp);
1712         }
1713         return (NULL);
1714 }
1715
1716
1717 int
1718 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1719 {
1720         /* For 1-2-1 with port reuse */
1721         struct sctppcbhead *head;
1722         struct sctp_inpcb *tinp;
1723
1724         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1725                 /* only works with port reuse on */
1726                 return (-1);
1727         }
1728         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1729                 return (0);
1730         }
1731         SCTP_INP_RUNLOCK(inp);
1732         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1733             SCTP_BASE_INFO(hashmark))];
1734         /* Kick out all non-listeners to the TCP hash */
1735         LIST_FOREACH(tinp, head, sctp_hash) {
1736                 if (tinp->sctp_lport != inp->sctp_lport) {
1737                         continue;
1738                 }
1739                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1740                         continue;
1741                 }
1742                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1743                         continue;
1744                 }
1745                 if (tinp->sctp_socket->so_qlimit) {
1746                         continue;
1747                 }
1748                 SCTP_INP_WLOCK(tinp);
1749                 LIST_REMOVE(tinp, sctp_hash);
1750                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1751                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1752                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1753                 SCTP_INP_WUNLOCK(tinp);
1754         }
1755         SCTP_INP_WLOCK(inp);
1756         /* Pull from where he was */
1757         LIST_REMOVE(inp, sctp_hash);
1758         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1759         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1760         LIST_INSERT_HEAD(head, inp, sctp_hash);
1761         SCTP_INP_WUNLOCK(inp);
1762         SCTP_INP_RLOCK(inp);
1763         return (0);
1764 }
1765
1766
1767 struct sctp_inpcb *
1768 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1769     uint32_t vrf_id)
1770 {
1771         /*
1772          * First we check the hash table to see if someone has this port
1773          * bound with just the port.
1774          */
1775         struct sctp_inpcb *inp;
1776         struct sctppcbhead *head;
1777         struct sockaddr_in *sin;
1778         struct sockaddr_in6 *sin6;
1779         int lport;
1780         unsigned int i;
1781
1782         if (nam->sa_family == AF_INET) {
1783                 sin = (struct sockaddr_in *)nam;
1784                 lport = ((struct sockaddr_in *)nam)->sin_port;
1785         } else if (nam->sa_family == AF_INET6) {
1786                 sin6 = (struct sockaddr_in6 *)nam;
1787                 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
1788         } else {
1789                 /* unsupported family */
1790                 return (NULL);
1791         }
1792         /*
1793          * I could cheat here and just cast to one of the types but we will
1794          * do it right. It also provides the check against an Unsupported
1795          * type too.
1796          */
1797         /* Find the head of the ALLADDR chain */
1798         if (have_lock == 0) {
1799                 SCTP_INP_INFO_RLOCK();
1800         }
1801         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1802             SCTP_BASE_INFO(hashmark))];
1803         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1804
1805         /*
1806          * If the TCP model exists it could be that the main listening
1807          * endpoint is gone but there still exists a connected socket for
1808          * this guy. If so we can return the first one that we find. This
1809          * may NOT be the correct one so the caller should be wary on the
1810          * returned INP. Currently the only caller that sets find_tcp_pool
1811          * is in bindx where we are verifying that a user CAN bind the
1812          * address. He either has bound it already, or someone else has, or
1813          * its open to bind, so this is good enough.
1814          */
1815         if (inp == NULL && find_tcp_pool) {
1816                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1817                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1818                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1819                         if (inp) {
1820                                 break;
1821                         }
1822                 }
1823         }
1824         if (inp) {
1825                 SCTP_INP_INCR_REF(inp);
1826         }
1827         if (have_lock == 0) {
1828                 SCTP_INP_INFO_RUNLOCK();
1829         }
1830         return (inp);
1831 }
1832
1833 /*
1834  * Find an association for an endpoint with the pointer to whom you want to
1835  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1836  * need to change the *to to some other struct like a mbuf...
1837  */
1838 struct sctp_tcb *
1839 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1840     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1841     uint32_t vrf_id)
1842 {
1843         struct sctp_inpcb *inp = NULL;
1844         struct sctp_tcb *retval;
1845
1846         SCTP_INP_INFO_RLOCK();
1847         if (find_tcp_pool) {
1848                 if (inp_p != NULL) {
1849                         retval = sctp_tcb_special_locate(inp_p, from, to, netp,
1850                             vrf_id);
1851                 } else {
1852                         retval = sctp_tcb_special_locate(&inp, from, to, netp,
1853                             vrf_id);
1854                 }
1855                 if (retval != NULL) {
1856                         SCTP_INP_INFO_RUNLOCK();
1857                         return (retval);
1858                 }
1859         }
1860         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1861         if (inp_p != NULL) {
1862                 *inp_p = inp;
1863         }
1864         SCTP_INP_INFO_RUNLOCK();
1865
1866         if (inp == NULL) {
1867                 return (NULL);
1868         }
1869         /*
1870          * ok, we have an endpoint, now lets find the assoc for it (if any)
1871          * we now place the source address or from in the to of the find
1872          * endpoint call. Since in reality this chain is used from the
1873          * inbound packet side.
1874          */
1875         if (inp_p != NULL) {
1876                 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1877                     NULL);
1878         } else {
1879                 retval = sctp_findassociation_ep_addr(&inp, from, netp, to,
1880                     NULL);
1881         }
1882         return retval;
1883 }
1884
1885
1886 /*
1887  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1888  * find all addresses that the sender has specified in any address list. Each
1889  * address will be used to lookup the TCB and see if one exits.
1890  */
1891 static struct sctp_tcb *
1892 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1893     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1894     struct sockaddr *dest)
1895 {
1896         struct sockaddr_in sin4;
1897         struct sockaddr_in6 sin6;
1898         struct sctp_paramhdr *phdr, parm_buf;
1899         struct sctp_tcb *retval;
1900         uint32_t ptype, plen;
1901
1902         memset(&sin4, 0, sizeof(sin4));
1903         memset(&sin6, 0, sizeof(sin6));
1904         sin4.sin_len = sizeof(sin4);
1905         sin4.sin_family = AF_INET;
1906         sin4.sin_port = sh->src_port;
1907         sin6.sin6_len = sizeof(sin6);
1908         sin6.sin6_family = AF_INET6;
1909         sin6.sin6_port = sh->src_port;
1910
1911         retval = NULL;
1912         offset += sizeof(struct sctp_init_chunk);
1913
1914         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1915         while (phdr != NULL) {
1916                 /* now we must see if we want the parameter */
1917                 ptype = ntohs(phdr->param_type);
1918                 plen = ntohs(phdr->param_length);
1919                 if (plen == 0) {
1920                         break;
1921                 }
1922                 if (ptype == SCTP_IPV4_ADDRESS &&
1923                     plen == sizeof(struct sctp_ipv4addr_param)) {
1924                         /* Get the rest of the address */
1925                         struct sctp_ipv4addr_param ip4_parm, *p4;
1926
1927                         phdr = sctp_get_next_param(m, offset,
1928                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
1929                         if (phdr == NULL) {
1930                                 return (NULL);
1931                         }
1932                         p4 = (struct sctp_ipv4addr_param *)phdr;
1933                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
1934                         /* look it up */
1935                         retval = sctp_findassociation_ep_addr(inp_p,
1936                             (struct sockaddr *)&sin4, netp, dest, NULL);
1937                         if (retval != NULL) {
1938                                 return (retval);
1939                         }
1940                 } else if (ptype == SCTP_IPV6_ADDRESS &&
1941                     plen == sizeof(struct sctp_ipv6addr_param)) {
1942                         /* Get the rest of the address */
1943                         struct sctp_ipv6addr_param ip6_parm, *p6;
1944
1945                         phdr = sctp_get_next_param(m, offset,
1946                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
1947                         if (phdr == NULL) {
1948                                 return (NULL);
1949                         }
1950                         p6 = (struct sctp_ipv6addr_param *)phdr;
1951                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
1952                         /* look it up */
1953                         retval = sctp_findassociation_ep_addr(inp_p,
1954                             (struct sockaddr *)&sin6, netp, dest, NULL);
1955                         if (retval != NULL) {
1956                                 return (retval);
1957                         }
1958                 }
1959                 offset += SCTP_SIZE32(plen);
1960                 phdr = sctp_get_next_param(m, offset, &parm_buf,
1961                     sizeof(parm_buf));
1962         }
1963         return (NULL);
1964 }
1965
1966 static struct sctp_tcb *
1967 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
1968     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
1969     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
1970 {
1971         /*
1972          * Use my vtag to hash. If we find it we then verify the source addr
1973          * is in the assoc. If all goes well we save a bit on rec of a
1974          * packet.
1975          */
1976         struct sctpasochead *head;
1977         struct sctp_nets *net;
1978         struct sctp_tcb *stcb;
1979
1980         *netp = NULL;
1981         *inp_p = NULL;
1982         SCTP_INP_INFO_RLOCK();
1983         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
1984             SCTP_BASE_INFO(hashasocmark))];
1985         if (head == NULL) {
1986                 /* invalid vtag */
1987                 SCTP_INP_INFO_RUNLOCK();
1988                 return (NULL);
1989         }
1990         LIST_FOREACH(stcb, head, sctp_asocs) {
1991                 SCTP_INP_RLOCK(stcb->sctp_ep);
1992                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1993                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1994                         continue;
1995                 }
1996                 SCTP_TCB_LOCK(stcb);
1997                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1998                 if (stcb->asoc.my_vtag == vtag) {
1999                         /* candidate */
2000                         if (stcb->rport != rport) {
2001                                 SCTP_TCB_UNLOCK(stcb);
2002                                 continue;
2003                         }
2004                         if (stcb->sctp_ep->sctp_lport != lport) {
2005                                 SCTP_TCB_UNLOCK(stcb);
2006                                 continue;
2007                         }
2008                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2009                                 SCTP_TCB_UNLOCK(stcb);
2010                                 continue;
2011                         }
2012                         /* RRS:Need toaddr check here */
2013                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2014                                 /* Endpoint does not own this address */
2015                                 SCTP_TCB_UNLOCK(stcb);
2016                                 continue;
2017                         }
2018                         if (remote_tag) {
2019                                 /*
2020                                  * If we have both vtags that's all we match
2021                                  * on
2022                                  */
2023                                 if (stcb->asoc.peer_vtag == remote_tag) {
2024                                         /*
2025                                          * If both tags match we consider it
2026                                          * conclusive and check NO
2027                                          * source/destination addresses
2028                                          */
2029                                         goto conclusive;
2030                                 }
2031                         }
2032                         if (skip_src_check) {
2033                 conclusive:
2034                                 if (from) {
2035                                         net = sctp_findnet(stcb, from);
2036                                 } else {
2037                                         *netp = NULL;   /* unknown */
2038                                 }
2039                                 if (inp_p)
2040                                         *inp_p = stcb->sctp_ep;
2041                                 SCTP_INP_INFO_RUNLOCK();
2042                                 return (stcb);
2043                         }
2044                         net = sctp_findnet(stcb, from);
2045                         if (net) {
2046                                 /* yep its him. */
2047                                 *netp = net;
2048                                 SCTP_STAT_INCR(sctps_vtagexpress);
2049                                 *inp_p = stcb->sctp_ep;
2050                                 SCTP_INP_INFO_RUNLOCK();
2051                                 return (stcb);
2052                         } else {
2053                                 /*
2054                                  * not him, this should only happen in rare
2055                                  * cases so I peg it.
2056                                  */
2057                                 SCTP_STAT_INCR(sctps_vtagbogus);
2058                         }
2059                 }
2060                 SCTP_TCB_UNLOCK(stcb);
2061         }
2062         SCTP_INP_INFO_RUNLOCK();
2063         return (NULL);
2064 }
2065
2066 /*
2067  * Find an association with the pointer to the inbound IP packet. This can be
2068  * a IPv4 or IPv6 packet.
2069  */
2070 struct sctp_tcb *
2071 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
2072     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2073     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2074 {
2075         int find_tcp_pool;
2076         struct ip *iph;
2077         struct sctp_tcb *retval;
2078         struct sockaddr_storage to_store, from_store;
2079         struct sockaddr *to = (struct sockaddr *)&to_store;
2080         struct sockaddr *from = (struct sockaddr *)&from_store;
2081         struct sctp_inpcb *inp;
2082
2083         iph = mtod(m, struct ip *);
2084         switch (iph->ip_v) {
2085         case IPVERSION:
2086                 {
2087                         /* its IPv4 */
2088                         struct sockaddr_in *from4;
2089
2090                         from4 = (struct sockaddr_in *)&from_store;
2091                         bzero(from4, sizeof(*from4));
2092                         from4->sin_family = AF_INET;
2093                         from4->sin_len = sizeof(struct sockaddr_in);
2094                         from4->sin_addr.s_addr = iph->ip_src.s_addr;
2095                         from4->sin_port = sh->src_port;
2096                         break;
2097                 }
2098 #ifdef INET6
2099         case IPV6_VERSION >> 4:
2100                 {
2101                         /* its IPv6 */
2102                         struct ip6_hdr *ip6;
2103                         struct sockaddr_in6 *from6;
2104
2105                         ip6 = mtod(m, struct ip6_hdr *);
2106                         from6 = (struct sockaddr_in6 *)&from_store;
2107                         bzero(from6, sizeof(*from6));
2108                         from6->sin6_family = AF_INET6;
2109                         from6->sin6_len = sizeof(struct sockaddr_in6);
2110                         from6->sin6_addr = ip6->ip6_src;
2111                         from6->sin6_port = sh->src_port;
2112                         /* Get the scopes in properly to the sin6 addr's */
2113                         /* we probably don't need these operations */
2114                         (void)sa6_recoverscope(from6);
2115                         sa6_embedscope(from6, MODULE_GLOBAL(ip6_use_defzone));
2116                         break;
2117                 }
2118 #endif
2119         default:
2120                 /* Currently not supported. */
2121                 return (NULL);
2122         }
2123
2124
2125         switch (iph->ip_v) {
2126         case IPVERSION:
2127                 {
2128                         /* its IPv4 */
2129                         struct sockaddr_in *to4;
2130
2131                         to4 = (struct sockaddr_in *)&to_store;
2132                         bzero(to4, sizeof(*to4));
2133                         to4->sin_family = AF_INET;
2134                         to4->sin_len = sizeof(struct sockaddr_in);
2135                         to4->sin_addr.s_addr = iph->ip_dst.s_addr;
2136                         to4->sin_port = sh->dest_port;
2137                         break;
2138                 }
2139 #ifdef INET6
2140         case IPV6_VERSION >> 4:
2141                 {
2142                         /* its IPv6 */
2143                         struct ip6_hdr *ip6;
2144                         struct sockaddr_in6 *to6;
2145
2146                         ip6 = mtod(m, struct ip6_hdr *);
2147                         to6 = (struct sockaddr_in6 *)&to_store;
2148                         bzero(to6, sizeof(*to6));
2149                         to6->sin6_family = AF_INET6;
2150                         to6->sin6_len = sizeof(struct sockaddr_in6);
2151                         to6->sin6_addr = ip6->ip6_dst;
2152                         to6->sin6_port = sh->dest_port;
2153                         /* Get the scopes in properly to the sin6 addr's */
2154                         /* we probably don't need these operations */
2155                         (void)sa6_recoverscope(to6);
2156                         sa6_embedscope(to6, MODULE_GLOBAL(ip6_use_defzone));
2157                         break;
2158                 }
2159 #endif
2160         default:
2161                 /* TSNH */
2162                 break;
2163         }
2164         if (sh->v_tag) {
2165                 /* we only go down this path if vtag is non-zero */
2166                 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag),
2167                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2168                 if (retval) {
2169                         return (retval);
2170                 }
2171         }
2172         find_tcp_pool = 0;
2173         if ((ch->chunk_type != SCTP_INITIATION) &&
2174             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2175             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2176             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2177                 /* Other chunk types go to the tcp pool. */
2178                 find_tcp_pool = 1;
2179         }
2180         if (inp_p) {
2181                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
2182                     find_tcp_pool, vrf_id);
2183                 inp = *inp_p;
2184         } else {
2185                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
2186                     find_tcp_pool, vrf_id);
2187         }
2188         SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp);
2189         if (retval == NULL && inp) {
2190                 /* Found a EP but not this address */
2191                 if ((ch->chunk_type == SCTP_INITIATION) ||
2192                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2193                         /*-
2194                          * special hook, we do NOT return linp or an
2195                          * association that is linked to an existing
2196                          * association that is under the TCP pool (i.e. no
2197                          * listener exists). The endpoint finding routine
2198                          * will always find a listener before examining the
2199                          * TCP pool.
2200                          */
2201                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2202                                 if (inp_p) {
2203                                         *inp_p = NULL;
2204                                 }
2205                                 return (NULL);
2206                         }
2207                         retval = sctp_findassociation_special_addr(m, iphlen,
2208                             offset, sh, &inp, netp, to);
2209                         if (inp_p != NULL) {
2210                                 *inp_p = inp;
2211                         }
2212                 }
2213         }
2214         SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval);
2215         return (retval);
2216 }
2217
2218 /*
2219  * lookup an association by an ASCONF lookup address.
2220  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2221  */
2222 struct sctp_tcb *
2223 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
2224     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2225 {
2226         struct sctp_tcb *stcb;
2227         struct sockaddr_in *sin;
2228
2229 #ifdef INET6
2230         struct sockaddr_in6 *sin6;
2231
2232 #endif
2233         struct sockaddr_storage local_store, remote_store;
2234         struct sockaddr *to;
2235         struct ip *iph;
2236
2237 #ifdef INET6
2238         struct ip6_hdr *ip6;
2239
2240 #endif
2241         struct sctp_paramhdr parm_buf, *phdr;
2242         int ptype;
2243         int zero_address = 0;
2244
2245
2246         memset(&local_store, 0, sizeof(local_store));
2247         memset(&remote_store, 0, sizeof(remote_store));
2248         to = (struct sockaddr *)&local_store;
2249         /* First get the destination address setup too. */
2250         iph = mtod(m, struct ip *);
2251         switch (iph->ip_v) {
2252         case IPVERSION:
2253                 /* its IPv4 */
2254                 sin = (struct sockaddr_in *)&local_store;
2255                 sin->sin_family = AF_INET;
2256                 sin->sin_len = sizeof(*sin);
2257                 sin->sin_port = sh->dest_port;
2258                 sin->sin_addr.s_addr = iph->ip_dst.s_addr;
2259                 break;
2260 #ifdef INET6
2261         case IPV6_VERSION >> 4:
2262                 /* its IPv6 */
2263                 ip6 = mtod(m, struct ip6_hdr *);
2264                 sin6 = (struct sockaddr_in6 *)&local_store;
2265                 sin6->sin6_family = AF_INET6;
2266                 sin6->sin6_len = sizeof(*sin6);
2267                 sin6->sin6_port = sh->dest_port;
2268                 sin6->sin6_addr = ip6->ip6_dst;
2269                 break;
2270 #endif
2271         default:
2272                 return NULL;
2273         }
2274
2275         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2276             &parm_buf, sizeof(struct sctp_paramhdr));
2277         if (phdr == NULL) {
2278                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2279                     __FUNCTION__);
2280                 return NULL;
2281         }
2282         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2283         /* get the correlation address */
2284         switch (ptype) {
2285 #ifdef INET6
2286         case SCTP_IPV6_ADDRESS:
2287                 {
2288                         /* ipv6 address param */
2289                         struct sctp_ipv6addr_param *p6, p6_buf;
2290
2291                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2292                                 return NULL;
2293                         }
2294                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2295                             offset + sizeof(struct sctp_asconf_chunk),
2296                             &p6_buf.ph, sizeof(*p6));
2297                         if (p6 == NULL) {
2298                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2299                                     __FUNCTION__);
2300                                 return (NULL);
2301                         }
2302                         sin6 = (struct sockaddr_in6 *)&remote_store;
2303                         sin6->sin6_family = AF_INET6;
2304                         sin6->sin6_len = sizeof(*sin6);
2305                         sin6->sin6_port = sh->src_port;
2306                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2307                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2308                                 zero_address = 1;
2309                         break;
2310                 }
2311 #endif
2312         case SCTP_IPV4_ADDRESS:
2313                 {
2314                         /* ipv4 address param */
2315                         struct sctp_ipv4addr_param *p4, p4_buf;
2316
2317                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2318                                 return NULL;
2319                         }
2320                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2321                             offset + sizeof(struct sctp_asconf_chunk),
2322                             &p4_buf.ph, sizeof(*p4));
2323                         if (p4 == NULL) {
2324                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2325                                     __FUNCTION__);
2326                                 return (NULL);
2327                         }
2328                         sin = (struct sockaddr_in *)&remote_store;
2329                         sin->sin_family = AF_INET;
2330                         sin->sin_len = sizeof(*sin);
2331                         sin->sin_port = sh->src_port;
2332                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2333                         if (sin->sin_addr.s_addr == INADDR_ANY)
2334                                 zero_address = 1;
2335                         break;
2336                 }
2337         default:
2338                 /* invalid address param type */
2339                 return NULL;
2340         }
2341
2342         if (zero_address) {
2343                 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p,
2344                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2345                 /*
2346                  * printf("findassociation_ep_asconf: zero lookup address
2347                  * finds stcb 0x%x\n", (uint32_t)stcb);
2348                  */
2349         } else {
2350                 stcb = sctp_findassociation_ep_addr(inp_p,
2351                     (struct sockaddr *)&remote_store, netp,
2352                     to, NULL);
2353         }
2354         return (stcb);
2355 }
2356
2357
2358 /*
2359  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2360  * addresses. This way if we don't get a bind we by default pick a ephemeral
2361  * port with all addresses bound.
2362  */
2363 int
2364 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2365 {
2366         /*
2367          * we get called when a new endpoint starts up. We need to allocate
2368          * the sctp_inpcb structure from the zone and init it. Mark it as
2369          * unbound and find a port that we can use as an ephemeral with
2370          * INADDR_ANY. If the user binds later no problem we can then add in
2371          * the specific addresses. And setup the default parameters for the
2372          * EP.
2373          */
2374         int i, error;
2375         struct sctp_inpcb *inp;
2376         struct sctp_pcb *m;
2377         struct timeval time;
2378         sctp_sharedkey_t *null_key;
2379
2380         error = 0;
2381
2382         SCTP_INP_INFO_WLOCK();
2383         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2384         if (inp == NULL) {
2385                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2386                 SCTP_INP_INFO_WUNLOCK();
2387                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2388                 return (ENOBUFS);
2389         }
2390         /* zap it */
2391         bzero(inp, sizeof(*inp));
2392
2393         /* bump generations */
2394         /* setup socket pointers */
2395         inp->sctp_socket = so;
2396         inp->ip_inp.inp.inp_socket = so;
2397         inp->sctp_associd_counter = 1;
2398         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2399         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2400         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2401         inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable);
2402         /* init the small hash table we use to track asocid <-> tcb */
2403         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2404         if (inp->sctp_asocidhash == NULL) {
2405                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2406                 SCTP_INP_INFO_WUNLOCK();
2407                 return (ENOBUFS);
2408         }
2409 #ifdef IPSEC
2410         {
2411                 struct inpcbpolicy *pcb_sp = NULL;
2412
2413                 error = ipsec_init_policy(so, &pcb_sp);
2414                 /* Arrange to share the policy */
2415                 inp->ip_inp.inp.inp_sp = pcb_sp;
2416                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2417         }
2418         if (error != 0) {
2419                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2420                 SCTP_INP_INFO_WUNLOCK();
2421                 return error;
2422         }
2423 #endif                          /* IPSEC */
2424         SCTP_INCR_EP_COUNT();
2425         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2426         SCTP_INP_INFO_WUNLOCK();
2427
2428         so->so_pcb = (caddr_t)inp;
2429
2430         if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) ||
2431             (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) {
2432                 /* UDP style socket */
2433                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2434                     SCTP_PCB_FLAGS_UNBOUND);
2435                 /* Be sure it is NON-BLOCKING IO for UDP */
2436                 /* SCTP_SET_SO_NBIO(so); */
2437         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2438                 /* TCP style socket */
2439                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2440                     SCTP_PCB_FLAGS_UNBOUND);
2441                 /* Be sure we have blocking IO by default */
2442                 SCTP_CLEAR_SO_NBIO(so);
2443         } else {
2444                 /*
2445                  * unsupported socket type (RAW, etc)- in case we missed it
2446                  * in protosw
2447                  */
2448                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2449                 so->so_pcb = NULL;
2450                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2451                 return (EOPNOTSUPP);
2452         }
2453         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2454                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2455                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2456         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2457                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2458                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2459         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2460                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2461                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2462         }
2463         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2464             &inp->sctp_hashmark);
2465         if (inp->sctp_tcbhash == NULL) {
2466                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2467                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2468                 so->so_pcb = NULL;
2469                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2470                 return (ENOBUFS);
2471         }
2472         inp->def_vrf_id = vrf_id;
2473
2474         SCTP_INP_INFO_WLOCK();
2475         SCTP_INP_LOCK_INIT(inp);
2476         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2477         SCTP_INP_READ_INIT(inp);
2478         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2479         /* lock the new ep */
2480         SCTP_INP_WLOCK(inp);
2481
2482         /* add it to the info area */
2483         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2484         SCTP_INP_INFO_WUNLOCK();
2485
2486         TAILQ_INIT(&inp->read_queue);
2487         LIST_INIT(&inp->sctp_addr_list);
2488
2489         LIST_INIT(&inp->sctp_asoc_list);
2490
2491 #ifdef SCTP_TRACK_FREED_ASOCS
2492         /* TEMP CODE */
2493         LIST_INIT(&inp->sctp_asoc_free_list);
2494 #endif
2495         /* Init the timer structure for signature change */
2496         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2497         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2498
2499         /* now init the actual endpoint default data */
2500         m = &inp->sctp_ep;
2501
2502         /* setup the base timeout information */
2503         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2504         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2505         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2506         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2507         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2508         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2509         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2510         /* all max/min max are in ms */
2511         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2512         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2513         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2514         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2515         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2516
2517         m->max_open_streams_intome = MAX_SCTP_STREAMS;
2518
2519         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2520         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2521         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2522         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2523         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2524         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2525         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2526
2527         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2528         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2529         /* number of streams to pre-open on a association */
2530         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2531
2532         /* Add adaptation cookie */
2533         m->adaptation_layer_indicator = 0x504C5253;
2534
2535         /* seed random number generator */
2536         m->random_counter = 1;
2537         m->store_at = SCTP_SIGNATURE_SIZE;
2538         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2539         sctp_fill_random_store(m);
2540
2541         /* Minimum cookie size */
2542         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2543             sizeof(struct sctp_state_cookie);
2544         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2545
2546         /* Setup the initial secret */
2547         (void)SCTP_GETTIME_TIMEVAL(&time);
2548         m->time_of_secret_change = time.tv_sec;
2549
2550         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2551                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2552         }
2553         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2554
2555         /* How long is a cookie good for ? */
2556         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2557         /*
2558          * Initialize authentication parameters
2559          */
2560         m->local_hmacs = sctp_default_supported_hmaclist();
2561         m->local_auth_chunks = sctp_alloc_chunklist();
2562         sctp_auth_set_default_chunks(m->local_auth_chunks);
2563         LIST_INIT(&m->shared_keys);
2564         /* add default NULL key as key id 0 */
2565         null_key = sctp_alloc_sharedkey();
2566         sctp_insert_sharedkey(&m->shared_keys, null_key);
2567         SCTP_INP_WUNLOCK(inp);
2568 #ifdef SCTP_LOG_CLOSING
2569         sctp_log_closing(inp, NULL, 12);
2570 #endif
2571         return (error);
2572 }
2573
2574
2575 void
2576 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2577     struct sctp_tcb *stcb)
2578 {
2579         struct sctp_nets *net;
2580         uint16_t lport, rport;
2581         struct sctppcbhead *head;
2582         struct sctp_laddr *laddr, *oladdr;
2583
2584         atomic_add_int(&stcb->asoc.refcnt, 1);
2585         SCTP_TCB_UNLOCK(stcb);
2586         SCTP_INP_INFO_WLOCK();
2587         SCTP_INP_WLOCK(old_inp);
2588         SCTP_INP_WLOCK(new_inp);
2589         SCTP_TCB_LOCK(stcb);
2590         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2591
2592         new_inp->sctp_ep.time_of_secret_change =
2593             old_inp->sctp_ep.time_of_secret_change;
2594         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2595             sizeof(old_inp->sctp_ep.secret_key));
2596         new_inp->sctp_ep.current_secret_number =
2597             old_inp->sctp_ep.current_secret_number;
2598         new_inp->sctp_ep.last_secret_number =
2599             old_inp->sctp_ep.last_secret_number;
2600         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2601
2602         /* make it so new data pours into the new socket */
2603         stcb->sctp_socket = new_inp->sctp_socket;
2604         stcb->sctp_ep = new_inp;
2605
2606         /* Copy the port across */
2607         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2608         rport = stcb->rport;
2609         /* Pull the tcb from the old association */
2610         LIST_REMOVE(stcb, sctp_tcbhash);
2611         LIST_REMOVE(stcb, sctp_tcblist);
2612         if (stcb->asoc.in_asocid_hash) {
2613                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2614         }
2615         /* Now insert the new_inp into the TCP connected hash */
2616         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2617
2618         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2619         /* Its safe to access */
2620         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2621
2622         /* Now move the tcb into the endpoint list */
2623         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2624         /*
2625          * Question, do we even need to worry about the ep-hash since we
2626          * only have one connection? Probably not :> so lets get rid of it
2627          * and not suck up any kernel memory in that.
2628          */
2629         if (stcb->asoc.in_asocid_hash) {
2630                 struct sctpasochead *lhd;
2631
2632                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2633                     new_inp->hashasocidmark)];
2634                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2635         }
2636         /* Ok. Let's restart timer. */
2637         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2638                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2639                     stcb, net);
2640         }
2641
2642         SCTP_INP_INFO_WUNLOCK();
2643         if (new_inp->sctp_tcbhash != NULL) {
2644                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2645                 new_inp->sctp_tcbhash = NULL;
2646         }
2647         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2648                 /* Subset bound, so copy in the laddr list from the old_inp */
2649                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2650                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2651                         if (laddr == NULL) {
2652                                 /*
2653                                  * Gak, what can we do? This assoc is really
2654                                  * HOSED. We probably should send an abort
2655                                  * here.
2656                                  */
2657                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2658                                 continue;
2659                         }
2660                         SCTP_INCR_LADDR_COUNT();
2661                         bzero(laddr, sizeof(*laddr));
2662                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2663                         laddr->ifa = oladdr->ifa;
2664                         atomic_add_int(&laddr->ifa->refcount, 1);
2665                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2666                             sctp_nxt_addr);
2667                         new_inp->laddr_count++;
2668                 }
2669         }
2670         /*
2671          * Now any running timers need to be adjusted since we really don't
2672          * care if they are running or not just blast in the new_inp into
2673          * all of them.
2674          */
2675
2676         stcb->asoc.hb_timer.ep = (void *)new_inp;
2677         stcb->asoc.dack_timer.ep = (void *)new_inp;
2678         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2679         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2680         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2681         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2682         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2683         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2684         /* now what about the nets? */
2685         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2686                 net->pmtu_timer.ep = (void *)new_inp;
2687                 net->rxt_timer.ep = (void *)new_inp;
2688                 net->fr_timer.ep = (void *)new_inp;
2689         }
2690         SCTP_INP_WUNLOCK(new_inp);
2691         SCTP_INP_WUNLOCK(old_inp);
2692 }
2693
2694
2695
2696
2697 /* sctp_ifap is used to bypass normal local address validation checks */
2698 int
2699 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2700     struct sctp_ifa *sctp_ifap, struct thread *p)
2701 {
2702         /* bind a ep to a socket address */
2703         struct sctppcbhead *head;
2704         struct sctp_inpcb *inp, *inp_tmp;
2705         struct inpcb *ip_inp;
2706         int port_reuse_active = 0;
2707         int bindall;
2708         uint16_t lport;
2709         int error;
2710         uint32_t vrf_id;
2711
2712         lport = 0;
2713         error = 0;
2714         bindall = 1;
2715         inp = (struct sctp_inpcb *)so->so_pcb;
2716         ip_inp = (struct inpcb *)so->so_pcb;
2717 #ifdef SCTP_DEBUG
2718         if (addr) {
2719                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
2720                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2721                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
2722                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2723         }
2724 #endif
2725         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2726                 /* already did a bind, subsequent binds NOT allowed ! */
2727                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2728                 return (EINVAL);
2729         }
2730 #ifdef INVARIANTS
2731         if (p == NULL)
2732                 panic("null proc/thread");
2733 #endif
2734         if (addr != NULL) {
2735                 switch (addr->sa_family) {
2736                 case AF_INET:
2737                         {
2738                                 struct sockaddr_in *sin;
2739
2740                                 /* IPV6_V6ONLY socket? */
2741                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2742                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2743                                         return (EINVAL);
2744                                 }
2745                                 if (addr->sa_len != sizeof(*sin)) {
2746                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2747                                         return (EINVAL);
2748                                 }
2749                                 sin = (struct sockaddr_in *)addr;
2750                                 lport = sin->sin_port;
2751                                 /*
2752                                  * For LOOPBACK the prison_local_ip4() call
2753                                  * will transmute the ip address to the
2754                                  * proper value.
2755                                  */
2756                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2757                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2758                                         return (error);
2759                                 }
2760                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2761                                         bindall = 0;
2762                                 }
2763                                 break;
2764                         }
2765 #ifdef INET6
2766                 case AF_INET6:
2767                         {
2768                                 /*
2769                                  * Only for pure IPv6 Address. (No IPv4
2770                                  * Mapped!)
2771                                  */
2772                                 struct sockaddr_in6 *sin6;
2773
2774                                 sin6 = (struct sockaddr_in6 *)addr;
2775
2776                                 if (addr->sa_len != sizeof(*sin6)) {
2777                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2778                                         return (EINVAL);
2779                                 }
2780                                 lport = sin6->sin6_port;
2781
2782                                 /*
2783                                  * For LOOPBACK the prison_local_ip6() call
2784                                  * will transmute the ipv6 address to the
2785                                  * proper value.
2786                                  */
2787                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2788                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2789                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2790                                         return (error);
2791                                 }
2792                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2793                                         bindall = 0;
2794                                         /* KAME hack: embed scopeid */
2795                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2796                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2797                                                 return (EINVAL);
2798                                         }
2799                                 }
2800                                 /* this must be cleared for ifa_ifwithaddr() */
2801                                 sin6->sin6_scope_id = 0;
2802                                 break;
2803                         }
2804 #endif
2805                 default:
2806                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2807                         return (EAFNOSUPPORT);
2808                 }
2809         }
2810         SCTP_INP_INFO_WLOCK();
2811         SCTP_INP_WLOCK(inp);
2812         /* Setup a vrf_id to be the default for the non-bind-all case. */
2813         vrf_id = inp->def_vrf_id;
2814
2815         /* increase our count due to the unlock we do */
2816         SCTP_INP_INCR_REF(inp);
2817         if (lport) {
2818                 /*
2819                  * Did the caller specify a port? if so we must see if a ep
2820                  * already has this one bound.
2821                  */
2822                 /* got to be root to get at low ports */
2823                 if (ntohs(lport) < IPPORT_RESERVED) {
2824                         if (p && (error =
2825                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2826                             )) {
2827                                 SCTP_INP_DECR_REF(inp);
2828                                 SCTP_INP_WUNLOCK(inp);
2829                                 SCTP_INP_INFO_WUNLOCK();
2830                                 return (error);
2831                         }
2832                 }
2833                 if (p == NULL) {
2834                         SCTP_INP_DECR_REF(inp);
2835                         SCTP_INP_WUNLOCK(inp);
2836                         SCTP_INP_INFO_WUNLOCK();
2837                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2838                         return (error);
2839                 }
2840                 SCTP_INP_WUNLOCK(inp);
2841                 if (bindall) {
2842                         vrf_id = inp->def_vrf_id;
2843                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2844                         if (inp_tmp != NULL) {
2845                                 /*
2846                                  * lock guy returned and lower count note
2847                                  * that we are not bound so inp_tmp should
2848                                  * NEVER be inp. And it is this inp
2849                                  * (inp_tmp) that gets the reference bump,
2850                                  * so we must lower it.
2851                                  */
2852                                 SCTP_INP_DECR_REF(inp_tmp);
2853                                 /* unlock info */
2854                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2855                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2856                                         /*
2857                                          * Ok, must be one-2-one and
2858                                          * allowing port re-use
2859                                          */
2860                                         port_reuse_active = 1;
2861                                         goto continue_anyway;
2862                                 }
2863                                 SCTP_INP_DECR_REF(inp);
2864                                 SCTP_INP_INFO_WUNLOCK();
2865                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2866                                 return (EADDRINUSE);
2867                         }
2868                 } else {
2869                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2870                         if (inp_tmp != NULL) {
2871                                 /*
2872                                  * lock guy returned and lower count note
2873                                  * that we are not bound so inp_tmp should
2874                                  * NEVER be inp. And it is this inp
2875                                  * (inp_tmp) that gets the reference bump,
2876                                  * so we must lower it.
2877                                  */
2878                                 SCTP_INP_DECR_REF(inp_tmp);
2879                                 /* unlock info */
2880                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2881                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2882                                         /*
2883                                          * Ok, must be one-2-one and
2884                                          * allowing port re-use
2885                                          */
2886                                         port_reuse_active = 1;
2887                                         goto continue_anyway;
2888                                 }
2889                                 SCTP_INP_DECR_REF(inp);
2890                                 SCTP_INP_INFO_WUNLOCK();
2891                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2892                                 return (EADDRINUSE);
2893                         }
2894                 }
2895 continue_anyway:
2896                 SCTP_INP_WLOCK(inp);
2897                 if (bindall) {
2898                         /* verify that no lport is not used by a singleton */
2899                         if ((port_reuse_active == 0) &&
2900                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))
2901                             ) {
2902                                 /* Sorry someone already has this one bound */
2903                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2904                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2905                                         port_reuse_active = 1;
2906                                 } else {
2907                                         SCTP_INP_DECR_REF(inp);
2908                                         SCTP_INP_WUNLOCK(inp);
2909                                         SCTP_INP_INFO_WUNLOCK();
2910                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2911                                         return (EADDRINUSE);
2912                                 }
2913                         }
2914                 }
2915         } else {
2916                 uint16_t first, last, candidate;
2917                 uint16_t count;
2918                 int done;
2919
2920                 if (ip_inp->inp_flags & INP_HIGHPORT) {
2921                         first = MODULE_GLOBAL(ipport_hifirstauto);
2922                         last = MODULE_GLOBAL(ipport_hilastauto);
2923                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2924                         if (p && (error =
2925                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2926                             )) {
2927                                 SCTP_INP_DECR_REF(inp);
2928                                 SCTP_INP_WUNLOCK(inp);
2929                                 SCTP_INP_INFO_WUNLOCK();
2930                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2931                                 return (error);
2932                         }
2933                         first = MODULE_GLOBAL(ipport_lowfirstauto);
2934                         last = MODULE_GLOBAL(ipport_lowlastauto);
2935                 } else {
2936                         first = MODULE_GLOBAL(ipport_firstauto);
2937                         last = MODULE_GLOBAL(ipport_lastauto);
2938                 }
2939                 if (first > last) {
2940                         uint16_t temp;
2941
2942                         temp = first;
2943                         first = last;
2944                         last = temp;
2945                 }
2946                 count = last - first + 1;       /* number of candidates */
2947                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2948
2949                 done = 0;
2950                 while (!done) {
2951                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
2952                                 done = 1;
2953                         }
2954                         if (!done) {
2955                                 if (--count == 0) {
2956                                         SCTP_INP_DECR_REF(inp);
2957                                         SCTP_INP_WUNLOCK(inp);
2958                                         SCTP_INP_INFO_WUNLOCK();
2959                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2960                                         return (EADDRINUSE);
2961                                 }
2962                                 if (candidate == last)
2963                                         candidate = first;
2964                                 else
2965                                         candidate = candidate + 1;
2966                         }
2967                 }
2968                 lport = htons(candidate);
2969         }
2970         SCTP_INP_DECR_REF(inp);
2971         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2972             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2973                 /*
2974                  * this really should not happen. The guy did a non-blocking
2975                  * bind and then did a close at the same time.
2976                  */
2977                 SCTP_INP_WUNLOCK(inp);
2978                 SCTP_INP_INFO_WUNLOCK();
2979                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2980                 return (EINVAL);
2981         }
2982         /* ok we look clear to give out this port, so lets setup the binding */
2983         if (bindall) {
2984                 /* binding to all addresses, so just set in the proper flags */
2985                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
2986                 /* set the automatic addr changes from kernel flag */
2987                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
2988                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2989                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2990                 } else {
2991                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2992                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2993                 }
2994                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
2995                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2996                 } else {
2997                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2998                 }
2999                 /*
3000                  * set the automatic mobility_base from kernel flag (by
3001                  * micchie)
3002                  */
3003                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3004                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3005                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3006                 } else {
3007                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3008                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3009                 }
3010                 /*
3011                  * set the automatic mobility_fasthandoff from kernel flag
3012                  * (by micchie)
3013                  */
3014                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3015                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3016                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3017                 } else {
3018                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3019                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3020                 }
3021         } else {
3022                 /*
3023                  * bind specific, make sure flags is off and add a new
3024                  * address structure to the sctp_addr_list inside the ep
3025                  * structure.
3026                  *
3027                  * We will need to allocate one and insert it at the head. The
3028                  * socketopt call can just insert new addresses in there as
3029                  * well. It will also have to do the embed scope kame hack
3030                  * too (before adding).
3031                  */
3032                 struct sctp_ifa *ifa;
3033                 struct sockaddr_storage store_sa;
3034
3035                 memset(&store_sa, 0, sizeof(store_sa));
3036                 if (addr->sa_family == AF_INET) {
3037                         struct sockaddr_in *sin;
3038
3039                         sin = (struct sockaddr_in *)&store_sa;
3040                         memcpy(sin, addr, sizeof(struct sockaddr_in));
3041                         sin->sin_port = 0;
3042                 } else if (addr->sa_family == AF_INET6) {
3043                         struct sockaddr_in6 *sin6;
3044
3045                         sin6 = (struct sockaddr_in6 *)&store_sa;
3046                         memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3047                         sin6->sin6_port = 0;
3048                 }
3049                 /*
3050                  * first find the interface with the bound address need to
3051                  * zero out the port to find the address! yuck! can't do
3052                  * this earlier since need port for sctp_pcb_findep()
3053                  */
3054                 if (sctp_ifap != NULL)
3055                         ifa = sctp_ifap;
3056                 else {
3057                         /*
3058                          * Note for BSD we hit here always other O/S's will
3059                          * pass things in via the sctp_ifap argument
3060                          * (Panda).
3061                          */
3062                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3063                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3064                 }
3065                 if (ifa == NULL) {
3066                         /* Can't find an interface with that address */
3067                         SCTP_INP_WUNLOCK(inp);
3068                         SCTP_INP_INFO_WUNLOCK();
3069                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3070                         return (EADDRNOTAVAIL);
3071                 }
3072                 if (addr->sa_family == AF_INET6) {
3073                         /* GAK, more FIXME IFA lock? */
3074                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3075                                 /* Can't bind a non-existent addr. */
3076                                 SCTP_INP_WUNLOCK(inp);
3077                                 SCTP_INP_INFO_WUNLOCK();
3078                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3079                                 return (EINVAL);
3080                         }
3081                 }
3082                 /* we're not bound all */
3083                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3084                 /* allow bindx() to send ASCONF's for binding changes */
3085                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3086                 /* clear automatic addr changes from kernel flag */
3087                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3088
3089                 /* add this address to the endpoint list */
3090                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3091                 if (error != 0) {
3092                         SCTP_INP_WUNLOCK(inp);
3093                         SCTP_INP_INFO_WUNLOCK();
3094                         return (error);
3095                 }
3096                 inp->laddr_count++;
3097         }
3098         /* find the bucket */
3099         if (port_reuse_active) {
3100                 /* Put it into tcp 1-2-1 hash */
3101                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3102                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3103         } else {
3104                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3105         }
3106         /* put it in the bucket */
3107         LIST_INSERT_HEAD(head, inp, sctp_hash);
3108         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3109             head, ntohs(lport), port_reuse_active);
3110         /* set in the port */
3111         inp->sctp_lport = lport;
3112
3113         /* turn off just the unbound flag */
3114         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3115         SCTP_INP_WUNLOCK(inp);
3116         SCTP_INP_INFO_WUNLOCK();
3117         return (0);
3118 }
3119
3120
3121 static void
3122 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3123 {
3124         struct sctp_iterator *it, *nit;
3125
3126         /*
3127          * We enter with the only the ITERATOR_LOCK in place and a write
3128          * lock on the inp_info stuff.
3129          */
3130         it = sctp_it_ctl.cur_it;
3131         if (it && (it->vn != curvnet)) {
3132                 /* Its not looking at our VNET */
3133                 return;
3134         }
3135         if (it && (it->inp == inp)) {
3136                 /*
3137                  * This is tricky and we hold the iterator lock, but when it
3138                  * returns and gets the lock (when we release it) the
3139                  * iterator will try to operate on inp. We need to stop that
3140                  * from happening. But of course the iterator has a
3141                  * reference on the stcb and inp. We can mark it and it will
3142                  * stop.
3143                  *
3144                  * If its a single iterator situation, we set the end iterator
3145                  * flag. Otherwise we set the iterator to go to the next
3146                  * inp.
3147                  *
3148                  */
3149                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3150                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3151                 } else {
3152                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3153                 }
3154         }
3155         /*
3156          * Now go through and remove any single reference to our inp that
3157          * may be still pending on the list
3158          */
3159         SCTP_IPI_ITERATOR_WQ_LOCK();
3160         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3161                 if (it->vn != curvnet) {
3162                         continue;
3163                 }
3164                 if (it->inp == inp) {
3165                         /* This one points to me is it inp specific? */
3166                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3167                                 /* Remove and free this one */
3168                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3169                                     it, sctp_nxt_itr);
3170                                 if (it->function_atend != NULL) {
3171                                         (*it->function_atend) (it->pointer, it->val);
3172                                 }
3173                                 SCTP_FREE(it, SCTP_M_ITER);
3174                         } else {
3175                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3176                                 if (it->inp) {
3177                                         SCTP_INP_INCR_REF(it->inp);
3178                                 }
3179                         }
3180                         /*
3181                          * When its put in the refcnt is incremented so decr
3182                          * it
3183                          */
3184                         SCTP_INP_DECR_REF(inp);
3185                 }
3186         }
3187         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3188 }
3189
3190 /* release sctp_inpcb unbind the port */
3191 void
3192 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3193 {
3194         /*
3195          * Here we free a endpoint. We must find it (if it is in the Hash
3196          * table) and remove it from there. Then we must also find it in the
3197          * overall list and remove it from there. After all removals are
3198          * complete then any timer has to be stopped. Then start the actual
3199          * freeing. a) Any local lists. b) Any associations. c) The hash of
3200          * all associations. d) finally the ep itself.
3201          */
3202         struct sctp_pcb *m;
3203         struct sctp_tcb *asoc, *nasoc;
3204         struct sctp_laddr *laddr, *nladdr;
3205         struct inpcb *ip_pcb;
3206         struct socket *so;
3207         int being_refed = 0;
3208         struct sctp_queued_to_read *sq, *nsq;
3209         int cnt;
3210         sctp_sharedkey_t *shared_key, *nshared_key;
3211
3212
3213 #ifdef SCTP_LOG_CLOSING
3214         sctp_log_closing(inp, NULL, 0);
3215 #endif
3216         SCTP_ITERATOR_LOCK();
3217         /* mark any iterators on the list or being processed */
3218         sctp_iterator_inp_being_freed(inp);
3219         SCTP_ITERATOR_UNLOCK();
3220         so = inp->sctp_socket;
3221         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3222                 /* been here before.. eeks.. get out of here */
3223                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3224 #ifdef SCTP_LOG_CLOSING
3225                 sctp_log_closing(inp, NULL, 1);
3226 #endif
3227                 return;
3228         }
3229         SCTP_ASOC_CREATE_LOCK(inp);
3230         SCTP_INP_INFO_WLOCK();
3231
3232         SCTP_INP_WLOCK(inp);
3233         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3234                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3235                 /* socket is gone, so no more wakeups allowed */
3236                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3237                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3238                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3239
3240         }
3241         /* First time through we have the socket lock, after that no more. */
3242         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3243             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3244
3245         if (inp->control) {
3246                 sctp_m_freem(inp->control);
3247                 inp->control = NULL;
3248         }
3249         if (inp->pkt) {
3250                 sctp_m_freem(inp->pkt);
3251                 inp->pkt = NULL;
3252         }
3253         m = &inp->sctp_ep;
3254         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3255                                          * here but I will be nice :> (i.e.
3256                                          * ip_pcb = ep;) */
3257         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3258                 int cnt_in_sd;
3259
3260                 cnt_in_sd = 0;
3261                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3262                         SCTP_TCB_LOCK(asoc);
3263                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3264                                 /* Skip guys being freed */
3265                                 cnt_in_sd++;
3266                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3267                                         /*
3268                                          * Special case - we did not start a
3269                                          * kill timer on the asoc due to it
3270                                          * was not closed. So go ahead and
3271                                          * start it now.
3272                                          */
3273                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3274                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3275                                 }
3276                                 SCTP_TCB_UNLOCK(asoc);
3277                                 continue;
3278                         }
3279                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3280                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3281                             (asoc->asoc.total_output_queue_size == 0)) {
3282                                 /*
3283                                  * If we have data in queue, we don't want
3284                                  * to just free since the app may have done,
3285                                  * send()/close or connect/send/close. And
3286                                  * it wants the data to get across first.
3287                                  */
3288                                 /* Just abandon things in the front states */
3289                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3290                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3291                                         cnt_in_sd++;
3292                                 }
3293                                 continue;
3294                         }
3295                         /* Disconnect the socket please */
3296                         asoc->sctp_socket = NULL;
3297                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3298                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3299                             (asoc->asoc.control_pdapi) ||
3300                             (asoc->asoc.size_on_all_streams > 0) ||
3301                             (so && (so->so_rcv.sb_cc > 0))
3302                             ) {
3303                                 /* Left with Data unread */
3304                                 struct mbuf *op_err;
3305
3306                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3307                                     0, M_DONTWAIT, 1, MT_DATA);
3308                                 if (op_err) {
3309                                         /* Fill in the user initiated abort */
3310                                         struct sctp_paramhdr *ph;
3311                                         uint32_t *ippp;
3312
3313                                         SCTP_BUF_LEN(op_err) =
3314                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
3315                                         ph = mtod(op_err,
3316                                             struct sctp_paramhdr *);
3317                                         ph->param_type = htons(
3318                                             SCTP_CAUSE_USER_INITIATED_ABT);
3319                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
3320                                         ippp = (uint32_t *) (ph + 1);
3321                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
3322                                 }
3323                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3324 #if defined(SCTP_PANIC_ON_ABORT)
3325                                 panic("inpcb_free does an abort");
3326 #endif
3327                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3328                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3329                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3330                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3331                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3332                                 }
3333                                 if (sctp_free_assoc(inp, asoc,
3334                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3335                                         cnt_in_sd++;
3336                                 }
3337                                 continue;
3338                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3339                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3340                                     (asoc->asoc.stream_queue_cnt == 0)
3341                             ) {
3342                                 if (asoc->asoc.locked_on_sending) {
3343                                         goto abort_anyway;
3344                                 }
3345                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3346                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3347                                         /*
3348                                          * there is nothing queued to send,
3349                                          * so I send shutdown
3350                                          */
3351                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
3352                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3353                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3354                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3355                                         }
3356                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3357                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3358                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3359                                             asoc->asoc.primary_destination);
3360                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3361                                             asoc->asoc.primary_destination);
3362                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3363                                 }
3364                         } else {
3365                                 /* mark into shutdown pending */
3366                                 struct sctp_stream_queue_pending *sp;
3367
3368                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3369                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3370                                     asoc->asoc.primary_destination);
3371                                 if (asoc->asoc.locked_on_sending) {
3372                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3373                                             sctp_streamhead);
3374                                         if (sp == NULL) {
3375                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3376                                                     asoc->asoc.locked_on_sending,
3377                                                     asoc->asoc.locked_on_sending->stream_no);
3378                                         } else {
3379                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3380                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3381                                         }
3382                                 }
3383                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3384                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3385                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3386                                         struct mbuf *op_err;
3387
3388                         abort_anyway:
3389                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3390                                             0, M_DONTWAIT, 1, MT_DATA);
3391                                         if (op_err) {
3392                                                 /*
3393                                                  * Fill in the user
3394                                                  * initiated abort
3395                                                  */
3396                                                 struct sctp_paramhdr *ph;
3397                                                 uint32_t *ippp;
3398
3399                                                 SCTP_BUF_LEN(op_err) =
3400                                                     (sizeof(struct sctp_paramhdr) +
3401                                                     sizeof(uint32_t));
3402                                                 ph = mtod(op_err,
3403                                                     struct sctp_paramhdr *);
3404                                                 ph->param_type = htons(
3405                                                     SCTP_CAUSE_USER_INITIATED_ABT);
3406                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3407                                                 ippp = (uint32_t *) (ph + 1);
3408                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
3409                                         }
3410                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3411 #if defined(SCTP_PANIC_ON_ABORT)
3412                                         panic("inpcb_free does an abort");
3413 #endif
3414
3415                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3416                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3417                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3418                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3419                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3420                                         }
3421                                         if (sctp_free_assoc(inp, asoc,
3422                                             SCTP_PCBFREE_NOFORCE,
3423                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3424                                                 cnt_in_sd++;
3425                                         }
3426                                         continue;
3427                                 } else {
3428                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3429                                 }
3430                         }
3431                         cnt_in_sd++;
3432                         SCTP_TCB_UNLOCK(asoc);
3433                 }
3434                 /* now is there some left in our SHUTDOWN state? */
3435                 if (cnt_in_sd) {
3436 #ifdef SCTP_LOG_CLOSING
3437                         sctp_log_closing(inp, NULL, 2);
3438 #endif
3439                         inp->sctp_socket = NULL;
3440                         SCTP_INP_WUNLOCK(inp);
3441                         SCTP_ASOC_CREATE_UNLOCK(inp);
3442                         SCTP_INP_INFO_WUNLOCK();
3443                         return;
3444                 }
3445         }
3446         inp->sctp_socket = NULL;
3447         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3448             SCTP_PCB_FLAGS_UNBOUND) {
3449                 /*
3450                  * ok, this guy has been bound. It's port is somewhere in
3451                  * the SCTP_BASE_INFO(hash table). Remove it!
3452                  */
3453                 LIST_REMOVE(inp, sctp_hash);
3454                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3455         }
3456         /*
3457          * If there is a timer running to kill us, forget it, since it may
3458          * have a contest on the INP lock.. which would cause us to die ...
3459          */
3460         cnt = 0;
3461         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3462                 SCTP_TCB_LOCK(asoc);
3463                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3464                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3465                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3466                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3467                         }
3468                         cnt++;
3469                         SCTP_TCB_UNLOCK(asoc);
3470                         continue;
3471                 }
3472                 /* Free associations that are NOT killing us */
3473                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3474                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3475                         struct mbuf *op_err;
3476                         uint32_t *ippp;
3477
3478                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3479                             0, M_DONTWAIT, 1, MT_DATA);
3480                         if (op_err) {
3481                                 /* Fill in the user initiated abort */
3482                                 struct sctp_paramhdr *ph;
3483
3484                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
3485                                     sizeof(uint32_t));
3486                                 ph = mtod(op_err, struct sctp_paramhdr *);
3487                                 ph->param_type = htons(
3488                                     SCTP_CAUSE_USER_INITIATED_ABT);
3489                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3490                                 ippp = (uint32_t *) (ph + 1);
3491                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
3492
3493                         }
3494                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3495 #if defined(SCTP_PANIC_ON_ABORT)
3496                         panic("inpcb_free does an abort");
3497 #endif
3498                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3499                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3500                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3501                         cnt++;
3502                         SCTP_TCB_UNLOCK(asoc);
3503                         continue;
3504                 }
3505                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3506                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3507                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3508                 }
3509                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3510                         cnt++;
3511                 }
3512         }
3513         if (cnt) {
3514                 /* Ok we have someone out there that will kill us */
3515                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3516 #ifdef SCTP_LOG_CLOSING
3517                 sctp_log_closing(inp, NULL, 3);
3518 #endif
3519                 SCTP_INP_WUNLOCK(inp);
3520                 SCTP_ASOC_CREATE_UNLOCK(inp);
3521                 SCTP_INP_INFO_WUNLOCK();
3522                 return;
3523         }
3524         if (SCTP_INP_LOCK_CONTENDED(inp))
3525                 being_refed++;
3526         if (SCTP_INP_READ_CONTENDED(inp))
3527                 being_refed++;
3528         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3529                 being_refed++;
3530
3531         if ((inp->refcount) ||
3532             (being_refed) ||
3533             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3534                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3535 #ifdef SCTP_LOG_CLOSING
3536                 sctp_log_closing(inp, NULL, 4);
3537 #endif
3538                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3539                 SCTP_INP_WUNLOCK(inp);
3540                 SCTP_ASOC_CREATE_UNLOCK(inp);
3541                 SCTP_INP_INFO_WUNLOCK();
3542                 return;
3543         }
3544         inp->sctp_ep.signature_change.type = 0;
3545         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3546         /*
3547          * Remove it from the list .. last thing we need a lock for.
3548          */
3549         LIST_REMOVE(inp, sctp_list);
3550         SCTP_INP_WUNLOCK(inp);
3551         SCTP_ASOC_CREATE_UNLOCK(inp);
3552         SCTP_INP_INFO_WUNLOCK();
3553         /*
3554          * Now we release all locks. Since this INP cannot be found anymore
3555          * except possibly by the kill timer that might be running. We call
3556          * the drain function here. It should hit the case were it sees the
3557          * ACTIVE flag cleared and exit out freeing us to proceed and
3558          * destroy everything.
3559          */
3560         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3561                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3562         } else {
3563                 /* Probably un-needed */
3564                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3565         }
3566
3567 #ifdef SCTP_LOG_CLOSING
3568         sctp_log_closing(inp, NULL, 5);
3569 #endif
3570
3571
3572         if ((inp->sctp_asocidhash) != NULL) {
3573                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3574                 inp->sctp_asocidhash = NULL;
3575         }
3576         /* sa_ignore FREED_MEMORY */
3577         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3578                 /* Its only abandoned if it had data left */
3579                 if (sq->length)
3580                         SCTP_STAT_INCR(sctps_left_abandon);
3581
3582                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3583                 sctp_free_remote_addr(sq->whoFrom);
3584                 if (so)
3585                         so->so_rcv.sb_cc -= sq->length;
3586                 if (sq->data) {
3587                         sctp_m_freem(sq->data);
3588                         sq->data = NULL;
3589                 }
3590                 /*
3591                  * no need to free the net count, since at this point all
3592                  * assoc's are gone.
3593                  */
3594                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3595                 SCTP_DECR_READQ_COUNT();
3596         }
3597         /* Now the sctp_pcb things */
3598         /*
3599          * free each asoc if it is not already closed/free. we can't use the
3600          * macro here since le_next will get freed as part of the
3601          * sctp_free_assoc() call.
3602          */
3603         cnt = 0;
3604         if (so) {
3605 #ifdef IPSEC
3606                 ipsec_delete_pcbpolicy(ip_pcb);
3607 #endif                          /* IPSEC */
3608
3609                 /* Unlocks not needed since the socket is gone now */
3610         }
3611         if (ip_pcb->inp_options) {
3612                 (void)sctp_m_free(ip_pcb->inp_options);
3613                 ip_pcb->inp_options = 0;
3614         }
3615         if (ip_pcb->inp_moptions) {
3616                 inp_freemoptions(ip_pcb->inp_moptions);
3617                 ip_pcb->inp_moptions = 0;
3618         }
3619 #ifdef INET6
3620         if (ip_pcb->inp_vflag & INP_IPV6) {
3621                 struct in6pcb *in6p;
3622
3623                 in6p = (struct in6pcb *)inp;
3624                 ip6_freepcbopts(in6p->in6p_outputopts);
3625         }
3626 #endif                          /* INET6 */
3627         ip_pcb->inp_vflag = 0;
3628         /* free up authentication fields */
3629         if (inp->sctp_ep.local_auth_chunks != NULL)
3630                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3631         if (inp->sctp_ep.local_hmacs != NULL)
3632                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3633
3634         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3635                 LIST_REMOVE(shared_key, next);
3636                 sctp_free_sharedkey(shared_key);
3637                 /* sa_ignore FREED_MEMORY */
3638         }
3639
3640         /*
3641          * if we have an address list the following will free the list of
3642          * ifaddr's that are set into this ep. Again macro limitations here,
3643          * since the LIST_FOREACH could be a bad idea.
3644          */
3645         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3646                 sctp_remove_laddr(laddr);
3647         }
3648
3649 #ifdef SCTP_TRACK_FREED_ASOCS
3650         /* TEMP CODE */
3651         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3652                 LIST_REMOVE(asoc, sctp_tcblist);
3653                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3654                 SCTP_DECR_ASOC_COUNT();
3655         }
3656         /* *** END TEMP CODE *** */
3657 #endif
3658         /* Now lets see about freeing the EP hash table. */
3659         if (inp->sctp_tcbhash != NULL) {
3660                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3661                 inp->sctp_tcbhash = NULL;
3662         }
3663         /* Now we must put the ep memory back into the zone pool */
3664         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3665         SCTP_INP_LOCK_DESTROY(inp);
3666         SCTP_INP_READ_DESTROY(inp);
3667         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3668         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3669         SCTP_DECR_EP_COUNT();
3670 }
3671
3672
3673 struct sctp_nets *
3674 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3675 {
3676         struct sctp_nets *net;
3677
3678         /* locate the address */
3679         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3680                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3681                         return (net);
3682         }
3683         return (NULL);
3684 }
3685
3686
3687 int
3688 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3689 {
3690         struct sctp_ifa *sctp_ifa;
3691
3692         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3693         if (sctp_ifa) {
3694                 return (1);
3695         } else {
3696                 return (0);
3697         }
3698 }
3699
3700 /*
3701  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3702  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3703  * stats of stuff.
3704  */
3705 int
3706 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3707     int set_scope, int from)
3708 {
3709         /*
3710          * The following is redundant to the same lines in the
3711          * sctp_aloc_assoc() but is needed since others call the add address
3712          * function
3713          */
3714         struct sctp_nets *net, *netfirst;
3715         int addr_inscope;
3716
3717         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3718             from);
3719         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3720
3721         netfirst = sctp_findnet(stcb, newaddr);
3722         if (netfirst) {
3723                 /*
3724                  * Lie and return ok, we don't want to make the association
3725                  * go away for this behavior. It will happen in the TCP
3726                  * model in a connected socket. It does not reach the hash
3727                  * table until after the association is built so it can't be
3728                  * found. Mark as reachable, since the initial creation will
3729                  * have been cleared and the NOT_IN_ASSOC flag will have
3730                  * been added... and we don't want to end up removing it
3731                  * back out.
3732                  */
3733                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3734                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3735                             SCTP_ADDR_UNCONFIRMED);
3736                 } else {
3737                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3738                 }
3739
3740                 return (0);
3741         }
3742         addr_inscope = 1;
3743         if (newaddr->sa_family == AF_INET) {
3744                 struct sockaddr_in *sin;
3745
3746                 sin = (struct sockaddr_in *)newaddr;
3747                 if (sin->sin_addr.s_addr == 0) {
3748                         /* Invalid address */
3749                         return (-1);
3750                 }
3751                 /* zero out the bzero area */
3752                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3753
3754                 /* assure len is set */
3755                 sin->sin_len = sizeof(struct sockaddr_in);
3756                 if (set_scope) {
3757 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3758                         stcb->ipv4_local_scope = 1;
3759 #else
3760                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3761                                 stcb->asoc.ipv4_local_scope = 1;
3762                         }
3763 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3764                 } else {
3765                         /* Validate the address is in scope */
3766                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3767                             (stcb->asoc.ipv4_local_scope == 0)) {
3768                                 addr_inscope = 0;
3769                         }
3770                 }
3771 #ifdef INET6
3772         } else if (newaddr->sa_family == AF_INET6) {
3773                 struct sockaddr_in6 *sin6;
3774
3775                 sin6 = (struct sockaddr_in6 *)newaddr;
3776                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3777                         /* Invalid address */
3778                         return (-1);
3779                 }
3780                 /* assure len is set */
3781                 sin6->sin6_len = sizeof(struct sockaddr_in6);
3782                 if (set_scope) {
3783                         if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3784                                 stcb->asoc.loopback_scope = 1;
3785                                 stcb->asoc.local_scope = 0;
3786                                 stcb->asoc.ipv4_local_scope = 1;
3787                                 stcb->asoc.site_scope = 1;
3788                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3789                                 /*
3790                                  * If the new destination is a LINK_LOCAL we
3791                                  * must have common site scope. Don't set
3792                                  * the local scope since we may not share
3793                                  * all links, only loopback can do this.
3794                                  * Links on the local network would also be
3795                                  * on our private network for v4 too.
3796                                  */
3797                                 stcb->asoc.ipv4_local_scope = 1;
3798                                 stcb->asoc.site_scope = 1;
3799                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3800                                 /*
3801                                  * If the new destination is SITE_LOCAL then
3802                                  * we must have site scope in common.
3803                                  */
3804                                 stcb->asoc.site_scope = 1;
3805                         }
3806                 } else {
3807                         /* Validate the address is in scope */
3808                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3809                             (stcb->asoc.loopback_scope == 0)) {
3810                                 addr_inscope = 0;
3811                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3812                             (stcb->asoc.local_scope == 0)) {
3813                                 addr_inscope = 0;
3814                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3815                             (stcb->asoc.site_scope == 0)) {
3816                                 addr_inscope = 0;
3817                         }
3818                 }
3819 #endif
3820         } else {
3821                 /* not supported family type */
3822                 return (-1);
3823         }
3824         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3825         if (net == NULL) {
3826                 return (-1);
3827         }
3828         SCTP_INCR_RADDR_COUNT();
3829         bzero(net, sizeof(*net));
3830         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3831         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3832         if (newaddr->sa_family == AF_INET) {
3833                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3834         } else if (newaddr->sa_family == AF_INET6) {
3835                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3836         }
3837         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3838         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3839                 stcb->asoc.loopback_scope = 1;
3840                 stcb->asoc.ipv4_local_scope = 1;
3841                 stcb->asoc.local_scope = 0;
3842                 stcb->asoc.site_scope = 1;
3843                 addr_inscope = 1;
3844         }
3845         net->failure_threshold = stcb->asoc.def_net_failure;
3846         if (addr_inscope == 0) {
3847                 net->dest_state = (SCTP_ADDR_REACHABLE |
3848                     SCTP_ADDR_OUT_OF_SCOPE);
3849         } else {
3850                 if (from == SCTP_ADDR_IS_CONFIRMED)
3851                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3852                         net->dest_state = SCTP_ADDR_REACHABLE;
3853                 else
3854                         net->dest_state = SCTP_ADDR_REACHABLE |
3855                             SCTP_ADDR_UNCONFIRMED;
3856         }
3857         /*
3858          * We set this to 0, the timer code knows that this means its an
3859          * initial value
3860          */
3861         net->RTO = 0;
3862         net->RTO_measured = 0;
3863         stcb->asoc.numnets++;
3864         *(&net->ref_count) = 1;
3865         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3866         net->tos_flowlabel = 0;
3867         if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) {
3868                 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
3869         } else {
3870                 net->port = 0;
3871         }
3872 #ifdef INET
3873         if (newaddr->sa_family == AF_INET)
3874                 net->tos_flowlabel = stcb->asoc.default_tos;
3875 #endif
3876 #ifdef INET6
3877         if (newaddr->sa_family == AF_INET6)
3878                 net->tos_flowlabel = stcb->asoc.default_flowlabel;
3879 #endif
3880         /* Init the timer structure */
3881         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3882         SCTP_OS_TIMER_INIT(&net->fr_timer.timer);
3883         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3884
3885         /* Now generate a route for this guy */
3886 #ifdef INET6
3887         /* KAME hack: embed scopeid */
3888         if (newaddr->sa_family == AF_INET6) {
3889                 struct sockaddr_in6 *sin6;
3890
3891                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3892                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3893                 sin6->sin6_scope_id = 0;
3894         }
3895 #endif
3896         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3897
3898         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3899                 /* Get source address */
3900                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3901                     stcb,
3902                     (sctp_route_t *) & net->ro,
3903                     net,
3904                     0,
3905                     stcb->asoc.vrf_id);
3906                 /* Now get the interface MTU */
3907                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3908                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3909                 } else {
3910                         net->mtu = 0;
3911                 }
3912                 if (net->mtu == 0) {
3913                         /* Huh ?? */
3914                         net->mtu = SCTP_DEFAULT_MTU;
3915                 } else {
3916                         uint32_t rmtu;
3917
3918                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3919                         if (rmtu == 0) {
3920                                 /*
3921                                  * Start things off to match mtu of
3922                                  * interface please.
3923                                  */
3924                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3925                                     net->ro.ro_rt, net->mtu);
3926                         } else {
3927                                 /*
3928                                  * we take the route mtu over the interface,
3929                                  * since the route may be leading out the
3930                                  * loopback, or a different interface.
3931                                  */
3932                                 net->mtu = rmtu;
3933                         }
3934                 }
3935                 if (from == SCTP_ALLOC_ASOC) {
3936                         stcb->asoc.smallest_mtu = net->mtu;
3937                 }
3938         } else {
3939                 net->mtu = stcb->asoc.smallest_mtu;
3940         }
3941 #ifdef INET6
3942         if (newaddr->sa_family == AF_INET6) {
3943                 struct sockaddr_in6 *sin6;
3944
3945                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3946                 (void)sa6_recoverscope(sin6);
3947         }
3948 #endif
3949         if (net->port) {
3950                 net->mtu -= sizeof(struct udphdr);
3951         }
3952         if (stcb->asoc.smallest_mtu > net->mtu) {
3953                 stcb->asoc.smallest_mtu = net->mtu;
3954         }
3955         /* JRS - Use the congestion control given in the CC module */
3956         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
3957
3958         /*
3959          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3960          * of assoc (2005/06/27, iyengar@cis.udel.edu)
3961          */
3962         net->find_pseudo_cumack = 1;
3963         net->find_rtx_pseudo_cumack = 1;
3964         net->src_addr_selected = 0;
3965         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3966         if (net->ro.ro_rt == NULL) {
3967                 /* Since we have no route put it at the back */
3968                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3969         } else if (netfirst == NULL) {
3970                 /* We are the first one in the pool. */
3971                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3972         } else if (netfirst->ro.ro_rt == NULL) {
3973                 /*
3974                  * First one has NO route. Place this one ahead of the first
3975                  * one.
3976                  */
3977                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3978         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
3979                 /*
3980                  * This one has a different interface than the one at the
3981                  * top of the list. Place it ahead.
3982                  */
3983                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3984         } else {
3985                 /*
3986                  * Ok we have the same interface as the first one. Move
3987                  * forward until we find either a) one with a NULL route...
3988                  * insert ahead of that b) one with a different ifp.. insert
3989                  * after that. c) end of the list.. insert at the tail.
3990                  */
3991                 struct sctp_nets *netlook;
3992
3993                 do {
3994                         netlook = TAILQ_NEXT(netfirst, sctp_next);
3995                         if (netlook == NULL) {
3996                                 /* End of the list */
3997                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3998                                 break;
3999                         } else if (netlook->ro.ro_rt == NULL) {
4000                                 /* next one has NO route */
4001                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4002                                 break;
4003                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4004                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4005                                     net, sctp_next);
4006                                 break;
4007                         }
4008                         /* Shift forward */
4009                         netfirst = netlook;
4010                 } while (netlook != NULL);
4011         }
4012
4013         /* got to have a primary set */
4014         if (stcb->asoc.primary_destination == 0) {
4015                 stcb->asoc.primary_destination = net;
4016         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4017                     (net->ro.ro_rt) &&
4018             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4019                 /* No route to current primary adopt new primary */
4020                 stcb->asoc.primary_destination = net;
4021         }
4022         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
4023             net);
4024         /* Validate primary is first */
4025         net = TAILQ_FIRST(&stcb->asoc.nets);
4026         if ((net != stcb->asoc.primary_destination) &&
4027             (stcb->asoc.primary_destination)) {
4028                 /*
4029                  * first one on the list is NOT the primary sctp_cmpaddr()
4030                  * is much more efficient if the primary is the first on the
4031                  * list, make it so.
4032                  */
4033                 TAILQ_REMOVE(&stcb->asoc.nets,
4034                     stcb->asoc.primary_destination, sctp_next);
4035                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4036                     stcb->asoc.primary_destination, sctp_next);
4037         }
4038         return (0);
4039 }
4040
4041
4042 static uint32_t
4043 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4044 {
4045         uint32_t id;
4046         struct sctpasochead *head;
4047         struct sctp_tcb *lstcb;
4048
4049         SCTP_INP_WLOCK(inp);
4050 try_again:
4051         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4052                 /* TSNH */
4053                 SCTP_INP_WUNLOCK(inp);
4054                 return (0);
4055         }
4056         /*
4057          * We don't allow assoc id to be 0, this is needed otherwise if the
4058          * id were to wrap we would have issues with some socket options.
4059          */
4060         if (inp->sctp_associd_counter == 0) {
4061                 inp->sctp_associd_counter++;
4062         }
4063         id = inp->sctp_associd_counter;
4064         inp->sctp_associd_counter++;
4065         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4066         if (lstcb) {
4067                 goto try_again;
4068         }
4069         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4070         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4071         stcb->asoc.in_asocid_hash = 1;
4072         SCTP_INP_WUNLOCK(inp);
4073         return id;
4074 }
4075
4076 /*
4077  * allocate an association and add it to the endpoint. The caller must be
4078  * careful to add all additional addresses once they are know right away or
4079  * else the assoc will be may experience a blackout scenario.
4080  */
4081 struct sctp_tcb *
4082 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4083     int *error, uint32_t override_tag, uint32_t vrf_id,
4084     struct thread *p
4085 )
4086 {
4087         /* note the p argument is only valid in unbound sockets */
4088
4089         struct sctp_tcb *stcb;
4090         struct sctp_association *asoc;
4091         struct sctpasochead *head;
4092         uint16_t rport;
4093         int err;
4094
4095         /*
4096          * Assumption made here: Caller has done a
4097          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4098          * address does not exist already.
4099          */
4100         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4101                 /* Hit max assoc, sorry no more */
4102                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4103                 *error = ENOBUFS;
4104                 return (NULL);
4105         }
4106         if (firstaddr == NULL) {
4107                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4108                 *error = EINVAL;
4109                 return (NULL);
4110         }
4111         SCTP_INP_RLOCK(inp);
4112         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4113             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4114             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4115                 /*
4116                  * If its in the TCP pool, its NOT allowed to create an
4117                  * association. The parent listener needs to call
4118                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4119                  * off, or connected one does this.. its an error.
4120                  */
4121                 SCTP_INP_RUNLOCK(inp);
4122                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4123                 *error = EINVAL;
4124                 return (NULL);
4125         }
4126         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4127 #ifdef SCTP_DEBUG
4128         if (firstaddr) {
4129                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4130                 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4131                     ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4132         } else {
4133                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4134         }
4135 #endif                          /* SCTP_DEBUG */
4136         if (firstaddr->sa_family == AF_INET) {
4137                 struct sockaddr_in *sin;
4138
4139                 sin = (struct sockaddr_in *)firstaddr;
4140                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
4141                         /* Invalid address */
4142                         SCTP_INP_RUNLOCK(inp);
4143                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4144                         *error = EINVAL;
4145                         return (NULL);
4146                 }
4147                 rport = sin->sin_port;
4148         } else if (firstaddr->sa_family == AF_INET6) {
4149                 struct sockaddr_in6 *sin6;
4150
4151                 sin6 = (struct sockaddr_in6 *)firstaddr;
4152                 if ((sin6->sin6_port == 0) ||
4153                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
4154                         /* Invalid address */
4155                         SCTP_INP_RUNLOCK(inp);
4156                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4157                         *error = EINVAL;
4158                         return (NULL);
4159                 }
4160                 rport = sin6->sin6_port;
4161         } else {
4162                 /* not supported family type */
4163                 SCTP_INP_RUNLOCK(inp);
4164                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4165                 *error = EINVAL;
4166                 return (NULL);
4167         }
4168         SCTP_INP_RUNLOCK(inp);
4169         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4170                 /*
4171                  * If you have not performed a bind, then we need to do the
4172                  * ephemeral bind for you.
4173                  */
4174                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4175                     (struct sockaddr *)NULL,
4176                     (struct sctp_ifa *)NULL,
4177                     p
4178                     ))) {
4179                         /* bind error, probably perm */
4180                         *error = err;
4181                         return (NULL);
4182                 }
4183         }
4184         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4185         if (stcb == NULL) {
4186                 /* out of memory? */
4187                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4188                 *error = ENOMEM;
4189                 return (NULL);
4190         }
4191         SCTP_INCR_ASOC_COUNT();
4192
4193         bzero(stcb, sizeof(*stcb));
4194         asoc = &stcb->asoc;
4195
4196         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4197         SCTP_TCB_LOCK_INIT(stcb);
4198         SCTP_TCB_SEND_LOCK_INIT(stcb);
4199         stcb->rport = rport;
4200         /* setup back pointer's */
4201         stcb->sctp_ep = inp;
4202         stcb->sctp_socket = inp->sctp_socket;
4203         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4204                 /* failed */
4205                 SCTP_TCB_LOCK_DESTROY(stcb);
4206                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4207                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4208                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4209                 SCTP_DECR_ASOC_COUNT();
4210                 *error = err;
4211                 return (NULL);
4212         }
4213         /* and the port */
4214         SCTP_INP_INFO_WLOCK();
4215         SCTP_INP_WLOCK(inp);
4216         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4217                 /* inpcb freed while alloc going on */
4218                 SCTP_TCB_LOCK_DESTROY(stcb);
4219                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4220                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4221                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4222                 SCTP_INP_WUNLOCK(inp);
4223                 SCTP_INP_INFO_WUNLOCK();
4224                 SCTP_DECR_ASOC_COUNT();
4225                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4226                 *error = EINVAL;
4227                 return (NULL);
4228         }
4229         SCTP_TCB_LOCK(stcb);
4230
4231         /* now that my_vtag is set, add it to the hash */
4232         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4233         /* put it in the bucket in the vtag hash of assoc's for the system */
4234         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4235         SCTP_INP_INFO_WUNLOCK();
4236
4237         if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4238                 /* failure.. memory error? */
4239                 if (asoc->strmout) {
4240                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4241                         asoc->strmout = NULL;
4242                 }
4243                 if (asoc->mapping_array) {
4244                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4245                         asoc->mapping_array = NULL;
4246                 }
4247                 if (asoc->nr_mapping_array) {
4248                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4249                         asoc->nr_mapping_array = NULL;
4250                 }
4251                 SCTP_DECR_ASOC_COUNT();
4252                 SCTP_TCB_LOCK_DESTROY(stcb);
4253                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4254                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4255                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4256                 SCTP_INP_WUNLOCK(inp);
4257                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4258                 *error = ENOBUFS;
4259                 return (NULL);
4260         }
4261         /* Init all the timers */
4262         SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer);
4263         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4264         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4265         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4266         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4267         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4268         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4269         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4270
4271         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4272         /* now file the port under the hash as well */
4273         if (inp->sctp_tcbhash != NULL) {
4274                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4275                     inp->sctp_hashmark)];
4276                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4277         }
4278         SCTP_INP_WUNLOCK(inp);
4279         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
4280         return (stcb);
4281 }
4282
4283
4284 void
4285 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4286 {
4287         struct sctp_association *asoc;
4288
4289         asoc = &stcb->asoc;
4290         asoc->numnets--;
4291         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4292         if (net == asoc->primary_destination) {
4293                 /* Reset primary */
4294                 struct sctp_nets *lnet;
4295
4296                 lnet = TAILQ_FIRST(&asoc->nets);
4297                 /*
4298                  * Mobility adaptation Ideally, if deleted destination is
4299                  * the primary, it becomes a fast retransmission trigger by
4300                  * the subsequent SET PRIMARY. (by micchie)
4301                  */
4302                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4303                     SCTP_MOBILITY_BASE) ||
4304                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4305                     SCTP_MOBILITY_FASTHANDOFF)) {
4306                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4307                         if (asoc->deleted_primary != NULL) {
4308                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4309                                 goto out;
4310                         }
4311                         asoc->deleted_primary = net;
4312                         atomic_add_int(&net->ref_count, 1);
4313                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4314                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4315                         sctp_mobility_feature_on(stcb->sctp_ep,
4316                             SCTP_MOBILITY_PRIM_DELETED);
4317                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4318                             stcb->sctp_ep, stcb, NULL);
4319                 }
4320 out:
4321                 /* Try to find a confirmed primary */
4322                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4323         }
4324         if (net == asoc->last_data_chunk_from) {
4325                 /* Reset primary */
4326                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4327         }
4328         if (net == asoc->last_control_chunk_from) {
4329                 /* Clear net */
4330                 asoc->last_control_chunk_from = NULL;
4331         }
4332         sctp_free_remote_addr(net);
4333 }
4334
4335 /*
4336  * remove a remote endpoint address from an association, it will fail if the
4337  * address does not exist.
4338  */
4339 int
4340 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4341 {
4342         /*
4343          * Here we need to remove a remote address. This is quite simple, we
4344          * first find it in the list of address for the association
4345          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4346          * on that item. Note we do not allow it to be removed if there are
4347          * no other addresses.
4348          */
4349         struct sctp_association *asoc;
4350         struct sctp_nets *net, *nnet;
4351
4352         asoc = &stcb->asoc;
4353
4354         /* locate the address */
4355         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4356                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4357                         continue;
4358                 }
4359                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4360                     remaddr)) {
4361                         /* we found the guy */
4362                         if (asoc->numnets < 2) {
4363                                 /* Must have at LEAST two remote addresses */
4364                                 return (-1);
4365                         } else {
4366                                 sctp_remove_net(stcb, net);
4367                                 return (0);
4368                         }
4369                 }
4370         }
4371         /* not found. */
4372         return (-2);
4373 }
4374
4375 void
4376 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4377 {
4378         struct sctpvtaghead *chain;
4379         struct sctp_tagblock *twait_block;
4380         int found = 0;
4381         int i;
4382
4383         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4384         if (!LIST_EMPTY(chain)) {
4385                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4386                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4387                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4388                                     (twait_block->vtag_block[i].lport == lport) &&
4389                                     (twait_block->vtag_block[i].rport == rport)) {
4390                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4391                                         twait_block->vtag_block[i].v_tag = 0;
4392                                         twait_block->vtag_block[i].lport = 0;
4393                                         twait_block->vtag_block[i].rport = 0;
4394                                         found = 1;
4395                                         break;
4396                                 }
4397                         }
4398                         if (found)
4399                                 break;
4400                 }
4401         }
4402 }
4403
4404 int
4405 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4406 {
4407         struct sctpvtaghead *chain;
4408         struct sctp_tagblock *twait_block;
4409         int found = 0;
4410         int i;
4411
4412         SCTP_INP_INFO_WLOCK();
4413         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4414         if (!LIST_EMPTY(chain)) {
4415                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4416                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4417                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4418                                     (twait_block->vtag_block[i].lport == lport) &&
4419                                     (twait_block->vtag_block[i].rport == rport)) {
4420                                         found = 1;
4421                                         break;
4422                                 }
4423                         }
4424                         if (found)
4425                                 break;
4426                 }
4427         }
4428         SCTP_INP_INFO_WUNLOCK();
4429         return (found);
4430 }
4431
4432
4433 void
4434 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4435 {
4436         struct sctpvtaghead *chain;
4437         struct sctp_tagblock *twait_block;
4438         struct timeval now;
4439         int set, i;
4440
4441         if (time == 0) {
4442                 /* Its disabled */
4443                 return;
4444         }
4445         (void)SCTP_GETTIME_TIMEVAL(&now);
4446         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4447         set = 0;
4448         if (!LIST_EMPTY(chain)) {
4449                 /* Block(s) present, lets find space, and expire on the fly */
4450                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4451                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4452                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
4453                                     !set) {
4454                                         twait_block->vtag_block[i].tv_sec_at_expire =
4455                                             now.tv_sec + time;
4456                                         twait_block->vtag_block[i].v_tag = tag;
4457                                         twait_block->vtag_block[i].lport = lport;
4458                                         twait_block->vtag_block[i].rport = rport;
4459                                         set = 1;
4460                                 } else if ((twait_block->vtag_block[i].v_tag) &&
4461                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4462                                         /* Audit expires this guy */
4463                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4464                                         twait_block->vtag_block[i].v_tag = 0;
4465                                         twait_block->vtag_block[i].lport = 0;
4466                                         twait_block->vtag_block[i].rport = 0;
4467                                         if (set == 0) {
4468                                                 /* Reuse it for my new tag */
4469                                                 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4470                                                 twait_block->vtag_block[i].v_tag = tag;
4471                                                 twait_block->vtag_block[i].lport = lport;
4472                                                 twait_block->vtag_block[i].rport = rport;
4473                                                 set = 1;
4474                                         }
4475                                 }
4476                         }
4477                         if (set) {
4478                                 /*
4479                                  * We only do up to the block where we can
4480                                  * place our tag for audits
4481                                  */
4482                                 break;
4483                         }
4484                 }
4485         }
4486         /* Need to add a new block to chain */
4487         if (!set) {
4488                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4489                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4490                 if (twait_block == NULL) {
4491 #ifdef INVARIANTS
4492                         panic("Can not alloc tagblock");
4493 #endif
4494                         return;
4495                 }
4496                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4497                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4498                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4499                 twait_block->vtag_block[0].v_tag = tag;
4500                 twait_block->vtag_block[0].lport = lport;
4501                 twait_block->vtag_block[0].rport = rport;
4502         }
4503 }
4504
4505
4506
4507 /*-
4508  * Free the association after un-hashing the remote port. This
4509  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4510  * expect that the input to this function IS a locked TCB.
4511  * It will return 0, if it did NOT destroy the association (instead
4512  * it unlocks it. It will return NON-zero if it either destroyed the
4513  * association OR the association is already destroyed.
4514  */
4515 int
4516 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4517 {
4518         int i;
4519         struct sctp_association *asoc;
4520         struct sctp_nets *net, *nnet;
4521         struct sctp_laddr *laddr, *naddr;
4522         struct sctp_tmit_chunk *chk, *nchk;
4523         struct sctp_asconf_addr *aparam, *naparam;
4524         struct sctp_asconf_ack *aack, *naack;
4525         struct sctp_stream_reset_list *strrst, *nstrrst;
4526         struct sctp_queued_to_read *sq, *nsq;
4527         struct sctp_stream_queue_pending *sp, *nsp;
4528         sctp_sharedkey_t *shared_key, *nshared_key;
4529         struct socket *so;
4530
4531         /* first, lets purge the entry from the hash table. */
4532
4533 #ifdef SCTP_LOG_CLOSING
4534         sctp_log_closing(inp, stcb, 6);
4535 #endif
4536         if (stcb->asoc.state == 0) {
4537 #ifdef SCTP_LOG_CLOSING
4538                 sctp_log_closing(inp, NULL, 7);
4539 #endif
4540                 /* there is no asoc, really TSNH :-0 */
4541                 return (1);
4542         }
4543         /* TEMP CODE */
4544         if (stcb->freed_from_where == 0) {
4545                 /* Only record the first place free happened from */
4546                 stcb->freed_from_where = from_location;
4547         }
4548         /* TEMP CODE */
4549
4550         asoc = &stcb->asoc;
4551         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4552             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4553                 /* nothing around */
4554                 so = NULL;
4555         else
4556                 so = inp->sctp_socket;
4557
4558         /*
4559          * We used timer based freeing if a reader or writer is in the way.
4560          * So we first check if we are actually being called from a timer,
4561          * if so we abort early if a reader or writer is still in the way.
4562          */
4563         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4564             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4565                 /*
4566                  * is it the timer driving us? if so are the reader/writers
4567                  * gone?
4568                  */
4569                 if (stcb->asoc.refcnt) {
4570                         /* nope, reader or writer in the way */
4571                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4572                         /* no asoc destroyed */
4573                         SCTP_TCB_UNLOCK(stcb);
4574 #ifdef SCTP_LOG_CLOSING
4575                         sctp_log_closing(inp, stcb, 8);
4576 #endif
4577                         return (0);
4578                 }
4579         }
4580         /* now clean up any other timers */
4581         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4582         asoc->hb_timer.self = NULL;
4583         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4584         asoc->dack_timer.self = NULL;
4585         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4586         /*-
4587          * For stream reset we don't blast this unless
4588          * it is a str-reset timer, it might be the
4589          * free-asoc timer which we DON'T want to
4590          * disturb.
4591          */
4592         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4593                 asoc->strreset_timer.self = NULL;
4594         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4595         asoc->asconf_timer.self = NULL;
4596         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4597         asoc->autoclose_timer.self = NULL;
4598         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4599         asoc->shut_guard_timer.self = NULL;
4600         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4601         asoc->delayed_event_timer.self = NULL;
4602         /* Mobility adaptation */
4603         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4604         asoc->delete_prim_timer.self = NULL;
4605         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4606                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4607                 net->fr_timer.self = NULL;
4608                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4609                 net->rxt_timer.self = NULL;
4610                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4611                 net->pmtu_timer.self = NULL;
4612         }
4613         /* Now the read queue needs to be cleaned up (only once) */
4614         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4615                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4616                 SCTP_INP_READ_LOCK(inp);
4617                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4618                         if (sq->stcb == stcb) {
4619                                 sq->do_not_ref_stcb = 1;
4620                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4621                                 /*
4622                                  * If there is no end, there never will be
4623                                  * now.
4624                                  */
4625                                 if (sq->end_added == 0) {
4626                                         /* Held for PD-API clear that. */
4627                                         sq->pdapi_aborted = 1;
4628                                         sq->held_length = 0;
4629                                         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4630                                                 /*
4631                                                  * Need to add a PD-API
4632                                                  * aborted indication.
4633                                                  * Setting the control_pdapi
4634                                                  * assures that it will be
4635                                                  * added right after this
4636                                                  * msg.
4637                                                  */
4638                                                 uint32_t strseq;
4639
4640                                                 stcb->asoc.control_pdapi = sq;
4641                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4642                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4643                                                     stcb,
4644                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4645                                                     (void *)&strseq,
4646                                                     SCTP_SO_LOCKED);
4647                                                 stcb->asoc.control_pdapi = NULL;
4648                                         }
4649                                 }
4650                                 /* Add an end to wake them */
4651                                 sq->end_added = 1;
4652                         }
4653                 }
4654                 SCTP_INP_READ_UNLOCK(inp);
4655                 if (stcb->block_entry) {
4656                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4657                         stcb->block_entry->error = ECONNRESET;
4658                         stcb->block_entry = NULL;
4659                 }
4660         }
4661         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4662                 /*
4663                  * Someone holds a reference OR the socket is unaccepted
4664                  * yet.
4665                  */
4666                 if ((stcb->asoc.refcnt) ||
4667                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4668                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4669                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4670                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4671                 }
4672                 SCTP_TCB_UNLOCK(stcb);
4673                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4674                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4675                         /* nothing around */
4676                         so = NULL;
4677                 if (so) {
4678                         /* Wake any reader/writers */
4679                         sctp_sorwakeup(inp, so);
4680                         sctp_sowwakeup(inp, so);
4681                 }
4682 #ifdef SCTP_LOG_CLOSING
4683                 sctp_log_closing(inp, stcb, 9);
4684 #endif
4685                 /* no asoc destroyed */
4686                 return (0);
4687         }
4688 #ifdef SCTP_LOG_CLOSING
4689         sctp_log_closing(inp, stcb, 10);
4690 #endif
4691         /*
4692          * When I reach here, no others want to kill the assoc yet.. and I
4693          * own the lock. Now its possible an abort comes in when I do the
4694          * lock exchange below to grab all the locks to do the final take
4695          * out. to prevent this we increment the count, which will start a
4696          * timer and blow out above thus assuring us that we hold exclusive
4697          * killing of the asoc. Note that after getting back the TCB lock we
4698          * will go ahead and increment the counter back up and stop any
4699          * timer a passing stranger may have started :-S
4700          */
4701         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4702                 atomic_add_int(&stcb->asoc.refcnt, 1);
4703
4704                 SCTP_TCB_UNLOCK(stcb);
4705                 SCTP_INP_INFO_WLOCK();
4706                 SCTP_INP_WLOCK(inp);
4707                 SCTP_TCB_LOCK(stcb);
4708         }
4709         /* Double check the GONE flag */
4710         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4711             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4712                 /* nothing around */
4713                 so = NULL;
4714
4715         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4716             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4717                 /*
4718                  * For TCP type we need special handling when we are
4719                  * connected. We also include the peel'ed off ones to.
4720                  */
4721                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4722                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4723                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4724                         if (so) {
4725                                 SOCK_LOCK(so);
4726                                 if (so->so_rcv.sb_cc == 0) {
4727                                         so->so_state &= ~(SS_ISCONNECTING |
4728                                             SS_ISDISCONNECTING |
4729                                             SS_ISCONFIRMING |
4730                                             SS_ISCONNECTED);
4731                                 }
4732                                 socantrcvmore_locked(so);
4733                                 sctp_sowwakeup(inp, so);
4734                                 sctp_sorwakeup(inp, so);
4735                                 SCTP_SOWAKEUP(so);
4736                         }
4737                 }
4738         }
4739         /*
4740          * Make it invalid too, that way if its about to run it will abort
4741          * and return.
4742          */
4743         /* re-increment the lock */
4744         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4745                 atomic_add_int(&stcb->asoc.refcnt, -1);
4746         }
4747         if (stcb->asoc.refcnt) {
4748                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4749                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4750                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4751                         SCTP_INP_INFO_WUNLOCK();
4752                         SCTP_INP_WUNLOCK(inp);
4753                 }
4754                 SCTP_TCB_UNLOCK(stcb);
4755                 return (0);
4756         }
4757         asoc->state = 0;
4758         if (inp->sctp_tcbhash) {
4759                 LIST_REMOVE(stcb, sctp_tcbhash);
4760         }
4761         if (stcb->asoc.in_asocid_hash) {
4762                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4763         }
4764         /* Now lets remove it from the list of ALL associations in the EP */
4765         LIST_REMOVE(stcb, sctp_tcblist);
4766         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4767                 SCTP_INP_INCR_REF(inp);
4768                 SCTP_INP_WUNLOCK(inp);
4769         }
4770         /* pull from vtag hash */
4771         LIST_REMOVE(stcb, sctp_asocs);
4772         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4773             inp->sctp_lport, stcb->rport);
4774
4775         /*
4776          * Now restop the timers to be sure this is paranoia at is finest!
4777          */
4778         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4779         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4780         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4781         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4782         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4783         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4784         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4785         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4786         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4787                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4788                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4789                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4790         }
4791
4792         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4793         /*
4794          * The chunk lists and such SHOULD be empty but we check them just
4795          * in case.
4796          */
4797         /* anything on the wheel needs to be removed */
4798         for (i = 0; i < asoc->streamoutcnt; i++) {
4799                 struct sctp_stream_out *outs;
4800
4801                 outs = &asoc->strmout[i];
4802                 /* now clean up any chunks here */
4803                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4804                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4805                         if (sp->data) {
4806                                 if (so) {
4807                                         /* Still an open socket - report */
4808                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4809                                             SCTP_NOTIFY_DATAGRAM_UNSENT,
4810                                             (void *)sp, SCTP_SO_LOCKED);
4811                                 }
4812                                 if (sp->data) {
4813                                         sctp_m_freem(sp->data);
4814                                         sp->data = NULL;
4815                                         sp->tail_mbuf = NULL;
4816                                 }
4817                         }
4818                         if (sp->net) {
4819                                 sctp_free_remote_addr(sp->net);
4820                                 sp->net = NULL;
4821                         }
4822                         sctp_free_spbufspace(stcb, asoc, sp);
4823                         if (sp->holds_key_ref)
4824                                 sctp_auth_key_release(stcb, sp->auth_keyid);
4825                         /* Free the zone stuff  */
4826                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp);
4827                         SCTP_DECR_STRMOQ_COUNT();
4828                         /* sa_ignore FREED_MEMORY */
4829                 }
4830         }
4831         /* sa_ignore FREED_MEMORY */
4832         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4833                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4834                 SCTP_FREE(strrst, SCTP_M_STRESET);
4835         }
4836         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4837                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4838                 if (sq->data) {
4839                         sctp_m_freem(sq->data);
4840                         sq->data = NULL;
4841                 }
4842                 sctp_free_remote_addr(sq->whoFrom);
4843                 sq->whoFrom = NULL;
4844                 sq->stcb = NULL;
4845                 /* Free the ctl entry */
4846                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4847                 SCTP_DECR_READQ_COUNT();
4848                 /* sa_ignore FREED_MEMORY */
4849         }
4850         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4851                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4852                 if (chk->data) {
4853                         sctp_m_freem(chk->data);
4854                         chk->data = NULL;
4855                 }
4856                 if (chk->holds_key_ref)
4857                         sctp_auth_key_release(stcb, chk->auth_keyid);
4858                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4859                 SCTP_DECR_CHK_COUNT();
4860                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4861                 asoc->free_chunk_cnt--;
4862                 /* sa_ignore FREED_MEMORY */
4863         }
4864         /* pending send queue SHOULD be empty */
4865         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4866                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4867                 if (chk->data) {
4868                         if (so) {
4869                                 /* Still a socket? */
4870                                 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb,
4871                                     SCTP_NOTIFY_DATAGRAM_UNSENT, chk, SCTP_SO_LOCKED);
4872                         }
4873                         if (chk->data) {
4874                                 sctp_m_freem(chk->data);
4875                                 chk->data = NULL;
4876                         }
4877                 }
4878                 if (chk->holds_key_ref)
4879                         sctp_auth_key_release(stcb, chk->auth_keyid);
4880                 if (chk->whoTo) {
4881                         sctp_free_remote_addr(chk->whoTo);
4882                         chk->whoTo = NULL;
4883                 }
4884                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4885                 SCTP_DECR_CHK_COUNT();
4886                 /* sa_ignore FREED_MEMORY */
4887         }
4888         /* sent queue SHOULD be empty */
4889         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
4890                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4891                 if (chk->data) {
4892                         if (so) {
4893                                 /* Still a socket? */
4894                                 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb,
4895                                     SCTP_NOTIFY_DATAGRAM_SENT, chk, SCTP_SO_LOCKED);
4896                         }
4897                         if (chk->data) {
4898                                 sctp_m_freem(chk->data);
4899                                 chk->data = NULL;
4900                         }
4901                 }
4902                 if (chk->holds_key_ref)
4903                         sctp_auth_key_release(stcb, chk->auth_keyid);
4904                 sctp_free_remote_addr(chk->whoTo);
4905                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4906                 SCTP_DECR_CHK_COUNT();
4907                 /* sa_ignore FREED_MEMORY */
4908         }
4909         /* control queue MAY not be empty */
4910         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
4911                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4912                 if (chk->data) {
4913                         sctp_m_freem(chk->data);
4914                         chk->data = NULL;
4915                 }
4916                 if (chk->holds_key_ref)
4917                         sctp_auth_key_release(stcb, chk->auth_keyid);
4918                 sctp_free_remote_addr(chk->whoTo);
4919                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4920                 SCTP_DECR_CHK_COUNT();
4921                 /* sa_ignore FREED_MEMORY */
4922         }
4923         /* ASCONF queue MAY not be empty */
4924         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
4925                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
4926                 if (chk->data) {
4927                         sctp_m_freem(chk->data);
4928                         chk->data = NULL;
4929                 }
4930                 if (chk->holds_key_ref)
4931                         sctp_auth_key_release(stcb, chk->auth_keyid);
4932                 sctp_free_remote_addr(chk->whoTo);
4933                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4934                 SCTP_DECR_CHK_COUNT();
4935                 /* sa_ignore FREED_MEMORY */
4936         }
4937         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
4938                 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
4939                 if (chk->data) {
4940                         sctp_m_freem(chk->data);
4941                         chk->data = NULL;
4942                 }
4943                 if (chk->holds_key_ref)
4944                         sctp_auth_key_release(stcb, chk->auth_keyid);
4945                 sctp_free_remote_addr(chk->whoTo);
4946                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4947                 SCTP_DECR_CHK_COUNT();
4948                 /* sa_ignore FREED_MEMORY */
4949         }
4950
4951         if (asoc->mapping_array) {
4952                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4953                 asoc->mapping_array = NULL;
4954         }
4955         if (asoc->nr_mapping_array) {
4956                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4957                 asoc->nr_mapping_array = NULL;
4958         }
4959         /* the stream outs */
4960         if (asoc->strmout) {
4961                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4962                 asoc->strmout = NULL;
4963         }
4964         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
4965         if (asoc->strmin) {
4966                 struct sctp_queued_to_read *ctl, *nctl;
4967
4968                 for (i = 0; i < asoc->streamincnt; i++) {
4969                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
4970                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
4971                                 sctp_free_remote_addr(ctl->whoFrom);
4972                                 if (ctl->data) {
4973                                         sctp_m_freem(ctl->data);
4974                                         ctl->data = NULL;
4975                                 }
4976                                 /*
4977                                  * We don't free the address here since all
4978                                  * the net's were freed above.
4979                                  */
4980                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
4981                                 SCTP_DECR_READQ_COUNT();
4982                         }
4983                 }
4984                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
4985                 asoc->strmin = NULL;
4986         }
4987         asoc->streamincnt = 0;
4988         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4989 #ifdef INVARIANTS
4990                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
4991                         panic("no net's left alloc'ed, or list points to itself");
4992                 }
4993 #endif
4994                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4995                 sctp_free_remote_addr(net);
4996         }
4997         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
4998                 /* sa_ignore FREED_MEMORY */
4999                 sctp_remove_laddr(laddr);
5000         }
5001
5002         /* pending asconf (address) parameters */
5003         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5004                 /* sa_ignore FREED_MEMORY */
5005                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5006                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5007         }
5008         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5009                 /* sa_ignore FREED_MEMORY */
5010                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5011                 if (aack->data != NULL) {
5012                         sctp_m_freem(aack->data);
5013                 }
5014                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5015         }
5016         /* clean up auth stuff */
5017         if (asoc->local_hmacs)
5018                 sctp_free_hmaclist(asoc->local_hmacs);
5019         if (asoc->peer_hmacs)
5020                 sctp_free_hmaclist(asoc->peer_hmacs);
5021
5022         if (asoc->local_auth_chunks)
5023                 sctp_free_chunklist(asoc->local_auth_chunks);
5024         if (asoc->peer_auth_chunks)
5025                 sctp_free_chunklist(asoc->peer_auth_chunks);
5026
5027         sctp_free_authinfo(&asoc->authinfo);
5028
5029         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5030                 LIST_REMOVE(shared_key, next);
5031                 sctp_free_sharedkey(shared_key);
5032                 /* sa_ignore FREED_MEMORY */
5033         }
5034
5035         /* Insert new items here :> */
5036
5037         /* Get rid of LOCK */
5038         SCTP_TCB_LOCK_DESTROY(stcb);
5039         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5040         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5041                 SCTP_INP_INFO_WUNLOCK();
5042                 SCTP_INP_RLOCK(inp);
5043         }
5044 #ifdef SCTP_TRACK_FREED_ASOCS
5045         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5046                 /* now clean up the tasoc itself */
5047                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5048                 SCTP_DECR_ASOC_COUNT();
5049         } else {
5050                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5051         }
5052 #else
5053         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5054         SCTP_DECR_ASOC_COUNT();
5055 #endif
5056         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5057                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5058                         /*
5059                          * If its NOT the inp_free calling us AND sctp_close
5060                          * as been called, we call back...
5061                          */
5062                         SCTP_INP_RUNLOCK(inp);
5063                         /*
5064                          * This will start the kill timer (if we are the
5065                          * last one) since we hold an increment yet. But
5066                          * this is the only safe way to do this since
5067                          * otherwise if the socket closes at the same time
5068                          * we are here we might collide in the cleanup.
5069                          */
5070                         sctp_inpcb_free(inp,
5071                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5072                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5073                         SCTP_INP_DECR_REF(inp);
5074                         goto out_of;
5075                 } else {
5076                         /* The socket is still open. */
5077                         SCTP_INP_DECR_REF(inp);
5078                 }
5079         }
5080         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5081                 SCTP_INP_RUNLOCK(inp);
5082         }
5083 out_of:
5084         /* destroyed the asoc */
5085 #ifdef SCTP_LOG_CLOSING
5086         sctp_log_closing(inp, NULL, 11);
5087 #endif
5088         return (1);
5089 }
5090
5091
5092
5093 /*
5094  * determine if a destination is "reachable" based upon the addresses bound
5095  * to the current endpoint (e.g. only v4 or v6 currently bound)
5096  */
5097 /*
5098  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5099  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5100  * types bound as its endpoint
5101  */
5102 int
5103 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5104 {
5105         struct sctp_inpcb *inp;
5106         int answer;
5107
5108         /*
5109          * No locks here, the TCB, in all cases is already locked and an
5110          * assoc is up. There is either a INP lock by the caller applied (in
5111          * asconf case when deleting an address) or NOT in the HB case,
5112          * however if HB then the INP increment is up and the INP will not
5113          * be removed (on top of the fact that we have a TCB lock). So we
5114          * only want to read the sctp_flags, which is either bound-all or
5115          * not.. no protection needed since once an assoc is up you can't be
5116          * changing your binding.
5117          */
5118         inp = stcb->sctp_ep;
5119         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5120                 /* if bound all, destination is not restricted */
5121                 /*
5122                  * RRS: Question during lock work: Is this correct? If you
5123                  * are bound-all you still might need to obey the V4--V6
5124                  * flags??? IMO this bound-all stuff needs to be removed!
5125                  */
5126                 return (1);
5127         }
5128         /* NOTE: all "scope" checks are done when local addresses are added */
5129         if (destaddr->sa_family == AF_INET6) {
5130                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5131         } else if (destaddr->sa_family == AF_INET) {
5132                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5133         } else {
5134                 /* invalid family, so it's unreachable */
5135                 answer = 0;
5136         }
5137         return (answer);
5138 }
5139
5140 /*
5141  * update the inp_vflags on an endpoint
5142  */
5143 static void
5144 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5145 {
5146         struct sctp_laddr *laddr;
5147
5148         /* first clear the flag */
5149         inp->ip_inp.inp.inp_vflag = 0;
5150         /* set the flag based on addresses on the ep list */
5151         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5152                 if (laddr->ifa == NULL) {
5153                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5154                             __FUNCTION__);
5155                         continue;
5156                 }
5157                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5158                         continue;
5159                 }
5160                 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
5161                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5162                 } else if (laddr->ifa->address.sa.sa_family == AF_INET) {
5163                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5164                 }
5165         }
5166 }
5167
5168 /*
5169  * Add the address to the endpoint local address list There is nothing to be
5170  * done if we are bound to all addresses
5171  */
5172 void
5173 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5174 {
5175         struct sctp_laddr *laddr;
5176         int fnd, error = 0;
5177
5178         fnd = 0;
5179
5180         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5181                 /* You are already bound to all. You have it already */
5182                 return;
5183         }
5184         if (ifa->address.sa.sa_family == AF_INET6) {
5185                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5186                         /* Can't bind a non-useable addr. */
5187                         return;
5188                 }
5189         }
5190         /* first, is it already present? */
5191         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5192                 if (laddr->ifa == ifa) {
5193                         fnd = 1;
5194                         break;
5195                 }
5196         }
5197
5198         if (fnd == 0) {
5199                 /* Not in the ep list */
5200                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5201                 if (error != 0)
5202                         return;
5203                 inp->laddr_count++;
5204                 /* update inp_vflag flags */
5205                 if (ifa->address.sa.sa_family == AF_INET6) {
5206                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5207                 } else if (ifa->address.sa.sa_family == AF_INET) {
5208                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5209                 }
5210         }
5211         return;
5212 }
5213
5214
5215 /*
5216  * select a new (hopefully reachable) destination net (should only be used
5217  * when we deleted an ep addr that is the only usable source address to reach
5218  * the destination net)
5219  */
5220 static void
5221 sctp_select_primary_destination(struct sctp_tcb *stcb)
5222 {
5223         struct sctp_nets *net;
5224
5225         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5226                 /* for now, we'll just pick the first reachable one we find */
5227                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5228                         continue;
5229                 if (sctp_destination_is_reachable(stcb,
5230                     (struct sockaddr *)&net->ro._l_addr)) {
5231                         /* found a reachable destination */
5232                         stcb->asoc.primary_destination = net;
5233                 }
5234         }
5235         /* I can't there from here! ...we're gonna die shortly... */
5236 }
5237
5238
5239 /*
5240  * Delete the address from the endpoint local address list There is nothing
5241  * to be done if we are bound to all addresses
5242  */
5243 void
5244 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5245 {
5246         struct sctp_laddr *laddr;
5247         int fnd;
5248
5249         fnd = 0;
5250         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5251                 /* You are already bound to all. You have it already */
5252                 return;
5253         }
5254         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5255                 if (laddr->ifa == ifa) {
5256                         fnd = 1;
5257                         break;
5258                 }
5259         }
5260         if (fnd && (inp->laddr_count < 2)) {
5261                 /* can't delete unless there are at LEAST 2 addresses */
5262                 return;
5263         }
5264         if (fnd) {
5265                 /*
5266                  * clean up any use of this address go through our
5267                  * associations and clear any last_used_address that match
5268                  * this one for each assoc, see if a new primary_destination
5269                  * is needed
5270                  */
5271                 struct sctp_tcb *stcb;
5272
5273                 /* clean up "next_addr_touse" */
5274                 if (inp->next_addr_touse == laddr)
5275                         /* delete this address */
5276                         inp->next_addr_touse = NULL;
5277
5278                 /* clean up "last_used_address" */
5279                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5280                         struct sctp_nets *net;
5281
5282                         SCTP_TCB_LOCK(stcb);
5283                         if (stcb->asoc.last_used_address == laddr)
5284                                 /* delete this address */
5285                                 stcb->asoc.last_used_address = NULL;
5286                         /*
5287                          * Now spin through all the nets and purge any ref
5288                          * to laddr
5289                          */
5290                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5291                                 if (net->ro._s_addr &&
5292                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5293                                         /* Yep, purge src address selected */
5294                                         sctp_rtentry_t *rt;
5295
5296                                         /* delete this address if cached */
5297                                         rt = net->ro.ro_rt;
5298                                         if (rt != NULL) {
5299                                                 RTFREE(rt);
5300                                                 net->ro.ro_rt = NULL;
5301                                         }
5302                                         sctp_free_ifa(net->ro._s_addr);
5303                                         net->ro._s_addr = NULL;
5304                                         net->src_addr_selected = 0;
5305                                 }
5306                         }
5307                         SCTP_TCB_UNLOCK(stcb);
5308                 }               /* for each tcb */
5309                 /* remove it from the ep list */
5310                 sctp_remove_laddr(laddr);
5311                 inp->laddr_count--;
5312                 /* update inp_vflag flags */
5313                 sctp_update_ep_vflag(inp);
5314         }
5315         return;
5316 }
5317
5318 /*
5319  * Add the address to the TCB local address restricted list.
5320  * This is a "pending" address list (eg. addresses waiting for an
5321  * ASCONF-ACK response) and cannot be used as a valid source address.
5322  */
5323 void
5324 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5325 {
5326         struct sctp_inpcb *inp;
5327         struct sctp_laddr *laddr;
5328         struct sctpladdr *list;
5329
5330         /*
5331          * Assumes TCB is locked.. and possibly the INP. May need to
5332          * confirm/fix that if we need it and is not the case.
5333          */
5334         list = &stcb->asoc.sctp_restricted_addrs;
5335
5336         inp = stcb->sctp_ep;
5337         if (ifa->address.sa.sa_family == AF_INET6) {
5338                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5339                         /* Can't bind a non-existent addr. */
5340                         return;
5341                 }
5342         }
5343         /* does the address already exist? */
5344         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5345                 if (laddr->ifa == ifa) {
5346                         return;
5347                 }
5348         }
5349
5350         /* add to the list */
5351         (void)sctp_insert_laddr(list, ifa, 0);
5352         return;
5353 }
5354
5355 /*
5356  * insert an laddr entry with the given ifa for the desired list
5357  */
5358 int
5359 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5360 {
5361         struct sctp_laddr *laddr;
5362
5363         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5364         if (laddr == NULL) {
5365                 /* out of memory? */
5366                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5367                 return (EINVAL);
5368         }
5369         SCTP_INCR_LADDR_COUNT();
5370         bzero(laddr, sizeof(*laddr));
5371         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5372         laddr->ifa = ifa;
5373         laddr->action = act;
5374         atomic_add_int(&ifa->refcount, 1);
5375         /* insert it */
5376         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5377
5378         return (0);
5379 }
5380
5381 /*
5382  * Remove an laddr entry from the local address list (on an assoc)
5383  */
5384 void
5385 sctp_remove_laddr(struct sctp_laddr *laddr)
5386 {
5387
5388         /* remove from the list */
5389         LIST_REMOVE(laddr, sctp_nxt_addr);
5390         sctp_free_ifa(laddr->ifa);
5391         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5392         SCTP_DECR_LADDR_COUNT();
5393 }
5394
5395 /*
5396  * Remove a local address from the TCB local address restricted list
5397  */
5398 void
5399 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5400 {
5401         struct sctp_inpcb *inp;
5402         struct sctp_laddr *laddr;
5403
5404         /*
5405          * This is called by asconf work. It is assumed that a) The TCB is
5406          * locked and b) The INP is locked. This is true in as much as I can
5407          * trace through the entry asconf code where I did these locks.
5408          * Again, the ASCONF code is a bit different in that it does lock
5409          * the INP during its work often times. This must be since we don't
5410          * want other proc's looking up things while what they are looking
5411          * up is changing :-D
5412          */
5413
5414         inp = stcb->sctp_ep;
5415         /* if subset bound and don't allow ASCONF's, can't delete last */
5416         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5417             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5418                 if (stcb->sctp_ep->laddr_count < 2) {
5419                         /* can't delete last address */
5420                         return;
5421                 }
5422         }
5423         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5424                 /* remove the address if it exists */
5425                 if (laddr->ifa == NULL)
5426                         continue;
5427                 if (laddr->ifa == ifa) {
5428                         sctp_remove_laddr(laddr);
5429                         return;
5430                 }
5431         }
5432
5433         /* address not found! */
5434         return;
5435 }
5436
5437 /*
5438  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5439  */
5440 /* sysctl */
5441 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5442 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5443
5444
5445
5446 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5447 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5448 int *sctp_cpuarry = NULL;
5449 void
5450 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5451 {
5452         /* Queue a packet to a processor for the specified core */
5453         struct sctp_mcore_queue *qent;
5454         struct sctp_mcore_ctrl *wkq;
5455         int need_wake = 0;
5456
5457         if (sctp_mcore_workers == NULL) {
5458                 /* Something went way bad during setup */
5459                 sctp_input_with_port(m, off, 0);
5460                 return;
5461         }
5462         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5463             (sizeof(struct sctp_mcore_queue)),
5464             SCTP_M_MCORE);
5465         if (qent == NULL) {
5466                 /* This is trouble  */
5467                 sctp_input_with_port(m, off, 0);
5468                 return;
5469         }
5470         qent->vn = curvnet;
5471         qent->m = m;
5472         qent->off = off;
5473         qent->v6 = 0;
5474         wkq = &sctp_mcore_workers[cpu_to_use];
5475         SCTP_MCORE_QLOCK(wkq);
5476
5477         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5478         if (wkq->running == 0) {
5479                 need_wake = 1;
5480         }
5481         SCTP_MCORE_QUNLOCK(wkq);
5482         if (need_wake) {
5483                 wakeup(&wkq->running);
5484         }
5485 }
5486
5487 static void
5488 sctp_mcore_thread(void *arg)
5489 {
5490
5491         struct sctp_mcore_ctrl *wkq;
5492         struct sctp_mcore_queue *qent;
5493
5494         wkq = (struct sctp_mcore_ctrl *)arg;
5495         struct mbuf *m;
5496         int off, v6;
5497
5498         /* Wait for first tickle */
5499         SCTP_MCORE_LOCK(wkq);
5500         wkq->running = 0;
5501         msleep(&wkq->running,
5502             &wkq->core_mtx,
5503             0, "wait for pkt", 0);
5504         SCTP_MCORE_UNLOCK(wkq);
5505
5506         /* Bind to our cpu */
5507         thread_lock(curthread);
5508         sched_bind(curthread, wkq->cpuid);
5509         thread_unlock(curthread);
5510
5511         /* Now lets start working */
5512         SCTP_MCORE_LOCK(wkq);
5513         /* Now grab lock and go */
5514         while (1) {
5515                 SCTP_MCORE_QLOCK(wkq);
5516 skip_sleep:
5517                 wkq->running = 1;
5518                 qent = TAILQ_FIRST(&wkq->que);
5519                 if (qent) {
5520                         TAILQ_REMOVE(&wkq->que, qent, next);
5521                         SCTP_MCORE_QUNLOCK(wkq);
5522                         CURVNET_SET(qent->vn);
5523                         m = qent->m;
5524                         off = qent->off;
5525                         v6 = qent->v6;
5526                         SCTP_FREE(qent, SCTP_M_MCORE);
5527                         if (v6 == 0) {
5528                                 sctp_input_with_port(m, off, 0);
5529                         } else {
5530                                 printf("V6 not yet supported\n");
5531                                 sctp_m_freem(m);
5532                         }
5533                         CURVNET_RESTORE();
5534                         SCTP_MCORE_QLOCK(wkq);
5535                 }
5536                 wkq->running = 0;
5537                 if (!TAILQ_EMPTY(&wkq->que)) {
5538                         goto skip_sleep;
5539                 }
5540                 SCTP_MCORE_QUNLOCK(wkq);
5541                 msleep(&wkq->running,
5542                     &wkq->core_mtx,
5543                     0, "wait for pkt", 0);
5544         };
5545 }
5546
5547 static void
5548 sctp_startup_mcore_threads(void)
5549 {
5550         int i, cpu;
5551
5552         if (mp_ncpus == 1)
5553                 return;
5554
5555         if (sctp_mcore_workers != NULL) {
5556                 /*
5557                  * Already been here in some previous vnet?
5558                  */
5559                 return;
5560         }
5561         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5562             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5563             SCTP_M_MCORE);
5564         if (sctp_mcore_workers == NULL) {
5565                 /* TSNH I hope */
5566                 return;
5567         }
5568         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5569             sizeof(struct sctp_mcore_ctrl)));
5570         /* Init the structures */
5571         for (i = 0; i <= mp_maxid; i++) {
5572                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5573                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5574                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5575                 sctp_mcore_workers[i].cpuid = i;
5576         }
5577         if (sctp_cpuarry == NULL) {
5578                 SCTP_MALLOC(sctp_cpuarry, int *,
5579                     (mp_ncpus * sizeof(int)),
5580                     SCTP_M_MCORE);
5581                 i = 0;
5582                 CPU_FOREACH(cpu) {
5583                         sctp_cpuarry[i] = cpu;
5584                         i++;
5585                 }
5586         }
5587         /* Now start them all */
5588         CPU_FOREACH(cpu) {
5589                 (void)kproc_create(sctp_mcore_thread,
5590                     (void *)&sctp_mcore_workers[cpu],
5591                     &sctp_mcore_workers[cpu].thread_proc,
5592                     RFPROC,
5593                     SCTP_KTHREAD_PAGES,
5594                     SCTP_MCORE_NAME);
5595
5596         }
5597 }
5598
5599 #endif
5600
5601
5602 void
5603 sctp_pcb_init()
5604 {
5605         /*
5606          * SCTP initialization for the PCB structures should be called by
5607          * the sctp_init() funciton.
5608          */
5609         int i;
5610         struct timeval tv;
5611
5612         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5613                 /* error I was called twice */
5614                 return;
5615         }
5616         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5617
5618 #if defined(SCTP_LOCAL_TRACE_BUF)
5619         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5620 #endif
5621 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5622         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5623             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5624             SCTP_M_MCORE);
5625 #endif
5626         (void)SCTP_GETTIME_TIMEVAL(&tv);
5627 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5628         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5629         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5630         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5631 #else
5632         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5633         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5634         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5635 #endif
5636         /* init the empty list of (All) Endpoints */
5637         LIST_INIT(&SCTP_BASE_INFO(listhead));
5638
5639
5640         /* init the hash table of endpoints */
5641         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5642         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5643         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5644         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5645             &SCTP_BASE_INFO(hashasocmark));
5646         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5647             &SCTP_BASE_INFO(hashmark));
5648         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5649             &SCTP_BASE_INFO(hashtcpmark));
5650         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5651
5652
5653         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5654             &SCTP_BASE_INFO(hashvrfmark));
5655
5656         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5657             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5658         /* init the zones */
5659         /*
5660          * FIX ME: Should check for NULL returns, but if it does fail we are
5661          * doomed to panic anyways... add later maybe.
5662          */
5663         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5664             sizeof(struct sctp_inpcb), maxsockets);
5665
5666         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5667             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5668
5669         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5670             sizeof(struct sctp_laddr),
5671             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5672
5673         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5674             sizeof(struct sctp_nets),
5675             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5676
5677         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5678             sizeof(struct sctp_tmit_chunk),
5679             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5680
5681         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5682             sizeof(struct sctp_queued_to_read),
5683             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5684
5685         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5686             sizeof(struct sctp_stream_queue_pending),
5687             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5688
5689         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5690             sizeof(struct sctp_asconf),
5691             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5692
5693         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5694             sizeof(struct sctp_asconf_ack),
5695             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5696
5697
5698         /* Master Lock INIT for info structure */
5699         SCTP_INP_INFO_LOCK_INIT();
5700         SCTP_STATLOG_INIT_LOCK();
5701
5702         SCTP_IPI_COUNT_INIT();
5703         SCTP_IPI_ADDR_INIT();
5704 #ifdef SCTP_PACKET_LOGGING
5705         SCTP_IP_PKTLOG_INIT();
5706 #endif
5707         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5708
5709         SCTP_WQ_ADDR_INIT();
5710         /* not sure if we need all the counts */
5711         SCTP_BASE_INFO(ipi_count_ep) = 0;
5712         /* assoc/tcb zone info */
5713         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5714         /* local addrlist zone info */
5715         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5716         /* remote addrlist zone info */
5717         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5718         /* chunk info */
5719         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5720
5721         /* socket queue zone info */
5722         SCTP_BASE_INFO(ipi_count_readq) = 0;
5723
5724         /* stream out queue cont */
5725         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5726
5727         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5728         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5729
5730         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5731
5732         /* Init the TIMEWAIT list */
5733         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5734                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5735         }
5736
5737         sctp_startup_iterator();
5738
5739 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5740         sctp_startup_mcore_threads();
5741 #endif
5742
5743         /*
5744          * INIT the default VRF which for BSD is the only one, other O/S's
5745          * may have more. But initially they must start with one and then
5746          * add the VRF's as addresses are added.
5747          */
5748         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5749
5750 }
5751
5752 /*
5753  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5754  */
5755 void
5756 sctp_pcb_finish(void)
5757 {
5758         struct sctp_vrflist *vrf_bucket;
5759         struct sctp_vrf *vrf, *nvrf;
5760         struct sctp_ifn *ifn, *nifn;
5761         struct sctp_ifa *ifa, *nifa;
5762         struct sctpvtaghead *chain;
5763         struct sctp_tagblock *twait_block, *prev_twait_block;
5764         struct sctp_laddr *wi, *nwi;
5765         int i;
5766
5767         /*
5768          * Free BSD the it thread never exits but we do clean up. The only
5769          * way freebsd reaches here if we have VRF's but we still add the
5770          * ifdef to make it compile on old versions.
5771          */
5772         {
5773                 struct sctp_iterator *it, *nit;
5774
5775                 SCTP_IPI_ITERATOR_WQ_LOCK();
5776                 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5777                         if (it->vn != curvnet) {
5778                                 continue;
5779                         }
5780                         TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5781                         if (it->function_atend != NULL) {
5782                                 (*it->function_atend) (it->pointer, it->val);
5783                         }
5784                         SCTP_FREE(it, SCTP_M_ITER);
5785                 }
5786                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5787                 SCTP_ITERATOR_LOCK();
5788                 if ((sctp_it_ctl.cur_it) &&
5789                     (sctp_it_ctl.cur_it->vn == curvnet)) {
5790                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5791                 }
5792                 SCTP_ITERATOR_UNLOCK();
5793         }
5794
5795         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5796         SCTP_WQ_ADDR_LOCK();
5797         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5798                 LIST_REMOVE(wi, sctp_nxt_addr);
5799                 SCTP_DECR_LADDR_COUNT();
5800                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5801         }
5802         SCTP_WQ_ADDR_UNLOCK();
5803
5804         /*
5805          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5806          * destroyed first).
5807          */
5808         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5809         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5810                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5811                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5812                                 /* free the ifa */
5813                                 LIST_REMOVE(ifa, next_bucket);
5814                                 LIST_REMOVE(ifa, next_ifa);
5815                                 SCTP_FREE(ifa, SCTP_M_IFA);
5816                         }
5817                         /* free the ifn */
5818                         LIST_REMOVE(ifn, next_bucket);
5819                         LIST_REMOVE(ifn, next_ifn);
5820                         SCTP_FREE(ifn, SCTP_M_IFN);
5821                 }
5822                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5823                 /* free the vrf */
5824                 LIST_REMOVE(vrf, next_vrf);
5825                 SCTP_FREE(vrf, SCTP_M_VRF);
5826         }
5827         /* free the vrf hashes */
5828         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5829         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5830
5831         /*
5832          * free the TIMEWAIT list elements malloc'd in the function
5833          * sctp_add_vtag_to_timewait()...
5834          */
5835         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5836                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5837                 if (!LIST_EMPTY(chain)) {
5838                         prev_twait_block = NULL;
5839                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5840                                 if (prev_twait_block) {
5841                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5842                                 }
5843                                 prev_twait_block = twait_block;
5844                         }
5845                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5846                 }
5847         }
5848
5849         /* free the locks and mutexes */
5850 #ifdef SCTP_PACKET_LOGGING
5851         SCTP_IP_PKTLOG_DESTROY();
5852 #endif
5853         SCTP_IPI_ADDR_DESTROY();
5854         SCTP_STATLOG_DESTROY();
5855         SCTP_INP_INFO_LOCK_DESTROY();
5856
5857         SCTP_WQ_ADDR_DESTROY();
5858
5859         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5860         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5861         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5862         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5863         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5864         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5865         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5866         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5867         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5868         /* Get rid of other stuff to */
5869         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5870                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5871         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5872                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5873         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5874                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5875 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5876         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
5877 #endif
5878 }
5879
5880
5881 int
5882 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5883     int iphlen, int offset, int limit, struct sctphdr *sh,
5884     struct sockaddr *altsa)
5885 {
5886         /*
5887          * grub through the INIT pulling addresses and loading them to the
5888          * nets structure in the asoc. The from address in the mbuf should
5889          * also be loaded (if it is not already). This routine can be called
5890          * with either INIT or INIT-ACK's as long as the m points to the IP
5891          * packet and the offset points to the beginning of the parameters.
5892          */
5893         struct sctp_inpcb *inp, *l_inp;
5894         struct sctp_nets *net, *nnet, *net_tmp;
5895         struct ip *iph;
5896         struct sctp_paramhdr *phdr, parm_buf;
5897         struct sctp_tcb *stcb_tmp;
5898         uint16_t ptype, plen;
5899         struct sockaddr *sa;
5900         struct sockaddr_storage dest_store;
5901         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
5902         struct sockaddr_in sin;
5903         struct sockaddr_in6 sin6;
5904         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
5905         struct sctp_auth_random *p_random = NULL;
5906         uint16_t random_len = 0;
5907         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
5908         struct sctp_auth_hmac_algo *hmacs = NULL;
5909         uint16_t hmacs_len = 0;
5910         uint8_t saw_asconf = 0;
5911         uint8_t saw_asconf_ack = 0;
5912         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
5913         struct sctp_auth_chunk_list *chunks = NULL;
5914         uint16_t num_chunks = 0;
5915         sctp_key_t *new_key;
5916         uint32_t keylen;
5917         int got_random = 0, got_hmacs = 0, got_chklist = 0;
5918         uint8_t ecn_allowed;
5919
5920         /* First get the destination address setup too. */
5921         memset(&sin, 0, sizeof(sin));
5922         memset(&sin6, 0, sizeof(sin6));
5923
5924         sin.sin_family = AF_INET;
5925         sin.sin_len = sizeof(sin);
5926         sin.sin_port = stcb->rport;
5927
5928         sin6.sin6_family = AF_INET6;
5929         sin6.sin6_len = sizeof(struct sockaddr_in6);
5930         sin6.sin6_port = stcb->rport;
5931         if (altsa == NULL) {
5932                 iph = mtod(m, struct ip *);
5933                 switch (iph->ip_v) {
5934                 case IPVERSION:
5935                         {
5936                                 /* its IPv4 */
5937                                 struct sockaddr_in *sin_2;
5938
5939                                 sin_2 = (struct sockaddr_in *)(local_sa);
5940                                 memset(sin_2, 0, sizeof(sin));
5941                                 sin_2->sin_family = AF_INET;
5942                                 sin_2->sin_len = sizeof(sin);
5943                                 sin_2->sin_port = sh->dest_port;
5944                                 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
5945                                 sin.sin_addr = iph->ip_src;
5946                                 sa = (struct sockaddr *)&sin;
5947                                 break;
5948                         }
5949 #ifdef INET6
5950                 case IPV6_VERSION >> 4:
5951                         {
5952                                 /* its IPv6 */
5953                                 struct ip6_hdr *ip6;
5954                                 struct sockaddr_in6 *sin6_2;
5955
5956                                 ip6 = mtod(m, struct ip6_hdr *);
5957                                 sin6_2 = (struct sockaddr_in6 *)(local_sa);
5958                                 memset(sin6_2, 0, sizeof(sin6));
5959                                 sin6_2->sin6_family = AF_INET6;
5960                                 sin6_2->sin6_len = sizeof(struct sockaddr_in6);
5961                                 sin6_2->sin6_port = sh->dest_port;
5962                                 sin6.sin6_addr = ip6->ip6_src;
5963                                 sa = (struct sockaddr *)&sin6;
5964                                 break;
5965                         }
5966 #endif
5967                 default:
5968                         return (-1);
5969                         break;
5970                 }
5971         } else {
5972                 /*
5973                  * For cookies we use the src address NOT from the packet
5974                  * but from the original INIT
5975                  */
5976                 sa = altsa;
5977         }
5978         /* Turn off ECN until we get through all params */
5979         ecn_allowed = 0;
5980         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5981                 /* mark all addresses that we have currently on the list */
5982                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
5983         }
5984         /* does the source address already exist? if so skip it */
5985         l_inp = inp = stcb->sctp_ep;
5986
5987         atomic_add_int(&stcb->asoc.refcnt, 1);
5988         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
5989         atomic_add_int(&stcb->asoc.refcnt, -1);
5990
5991         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
5992                 /* we must add the source address */
5993                 /* no scope set here since we have a tcb already. */
5994                 if ((sa->sa_family == AF_INET) &&
5995                     (stcb->asoc.ipv4_addr_legal)) {
5996                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
5997                                 return (-1);
5998                         }
5999                 } else if ((sa->sa_family == AF_INET6) &&
6000                     (stcb->asoc.ipv6_addr_legal)) {
6001                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6002                                 return (-2);
6003                         }
6004                 }
6005         } else {
6006                 if (net_tmp != NULL && stcb_tmp == stcb) {
6007                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6008                 } else if (stcb_tmp != stcb) {
6009                         /* It belongs to another association? */
6010                         if (stcb_tmp)
6011                                 SCTP_TCB_UNLOCK(stcb_tmp);
6012                         return (-3);
6013                 }
6014         }
6015         if (stcb->asoc.state == 0) {
6016                 /* the assoc was freed? */
6017                 return (-4);
6018         }
6019         /*
6020          * peer must explicitly turn this on. This may have been initialized
6021          * to be "on" in order to allow local addr changes while INIT's are
6022          * in flight.
6023          */
6024         stcb->asoc.peer_supports_asconf = 0;
6025         /* now we must go through each of the params. */
6026         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6027         while (phdr) {
6028                 ptype = ntohs(phdr->param_type);
6029                 plen = ntohs(phdr->param_length);
6030                 /*
6031                  * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
6032                  * (int)plen);
6033                  */
6034                 if (offset + plen > limit) {
6035                         break;
6036                 }
6037                 if (plen == 0) {
6038                         break;
6039                 }
6040                 if (ptype == SCTP_IPV4_ADDRESS) {
6041                         if (stcb->asoc.ipv4_addr_legal) {
6042                                 struct sctp_ipv4addr_param *p4, p4_buf;
6043
6044                                 /* ok get the v4 address and check/add */
6045                                 phdr = sctp_get_next_param(m, offset,
6046                                     (struct sctp_paramhdr *)&p4_buf,
6047                                     sizeof(p4_buf));
6048                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6049                                     phdr == NULL) {
6050                                         return (-5);
6051                                 }
6052                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6053                                 sin.sin_addr.s_addr = p4->addr;
6054                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6055                                         /* Skip multi-cast addresses */
6056                                         goto next_param;
6057                                 }
6058                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6059                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6060                                         goto next_param;
6061                                 }
6062                                 sa = (struct sockaddr *)&sin;
6063                                 inp = stcb->sctp_ep;
6064                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6065                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6066                                     local_sa, stcb);
6067                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6068
6069                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6070                                     inp == NULL) {
6071                                         /* we must add the source address */
6072                                         /*
6073                                          * no scope set since we have a tcb
6074                                          * already
6075                                          */
6076
6077                                         /*
6078                                          * we must validate the state again
6079                                          * here
6080                                          */
6081                         add_it_now:
6082                                         if (stcb->asoc.state == 0) {
6083                                                 /* the assoc was freed? */
6084                                                 return (-7);
6085                                         }
6086                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6087                                                 return (-8);
6088                                         }
6089                                 } else if (stcb_tmp == stcb) {
6090                                         if (stcb->asoc.state == 0) {
6091                                                 /* the assoc was freed? */
6092                                                 return (-10);
6093                                         }
6094                                         if (net != NULL) {
6095                                                 /* clear flag */
6096                                                 net->dest_state &=
6097                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6098                                         }
6099                                 } else {
6100                                         /*
6101                                          * strange, address is in another
6102                                          * assoc? straighten out locks.
6103                                          */
6104                                         if (stcb_tmp) {
6105                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6106                                                         /*
6107                                                          * in setup state we
6108                                                          * abort this guy
6109                                                          */
6110                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6111                                                             stcb_tmp, 1, NULL, 0);
6112                                                         goto add_it_now;
6113                                                 }
6114                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6115                                         }
6116                                         if (stcb->asoc.state == 0) {
6117                                                 /* the assoc was freed? */
6118                                                 return (-12);
6119                                         }
6120                                         return (-13);
6121                                 }
6122                         }
6123                 } else if (ptype == SCTP_IPV6_ADDRESS) {
6124                         if (stcb->asoc.ipv6_addr_legal) {
6125                                 /* ok get the v6 address and check/add */
6126                                 struct sctp_ipv6addr_param *p6, p6_buf;
6127
6128                                 phdr = sctp_get_next_param(m, offset,
6129                                     (struct sctp_paramhdr *)&p6_buf,
6130                                     sizeof(p6_buf));
6131                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6132                                     phdr == NULL) {
6133                                         return (-14);
6134                                 }
6135                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6136                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6137                                     sizeof(p6->addr));
6138                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6139                                         /* Skip multi-cast addresses */
6140                                         goto next_param;
6141                                 }
6142                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6143                                         /*
6144                                          * Link local make no sense without
6145                                          * scope
6146                                          */
6147                                         goto next_param;
6148                                 }
6149                                 sa = (struct sockaddr *)&sin6;
6150                                 inp = stcb->sctp_ep;
6151                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6152                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6153                                     local_sa, stcb);
6154                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6155                                 if (stcb_tmp == NULL &&
6156                                     (inp == stcb->sctp_ep || inp == NULL)) {
6157                                         /*
6158                                          * we must validate the state again
6159                                          * here
6160                                          */
6161                         add_it_now6:
6162                                         if (stcb->asoc.state == 0) {
6163                                                 /* the assoc was freed? */
6164                                                 return (-16);
6165                                         }
6166                                         /*
6167                                          * we must add the address, no scope
6168                                          * set
6169                                          */
6170                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6171                                                 return (-17);
6172                                         }
6173                                 } else if (stcb_tmp == stcb) {
6174                                         /*
6175                                          * we must validate the state again
6176                                          * here
6177                                          */
6178                                         if (stcb->asoc.state == 0) {
6179                                                 /* the assoc was freed? */
6180                                                 return (-19);
6181                                         }
6182                                         if (net != NULL) {
6183                                                 /* clear flag */
6184                                                 net->dest_state &=
6185                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6186                                         }
6187                                 } else {
6188                                         /*
6189                                          * strange, address is in another
6190                                          * assoc? straighten out locks.
6191                                          */
6192                                         if (stcb_tmp)
6193                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6194                                                         /*
6195                                                          * in setup state we
6196                                                          * abort this guy
6197                                                          */
6198                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6199                                                             stcb_tmp, 1, NULL, 0);
6200                                                         goto add_it_now6;
6201                                                 }
6202                                         SCTP_TCB_UNLOCK(stcb_tmp);
6203
6204                                         if (stcb->asoc.state == 0) {
6205                                                 /* the assoc was freed? */
6206                                                 return (-21);
6207                                         }
6208                                         return (-22);
6209                                 }
6210                         }
6211                 } else if (ptype == SCTP_ECN_CAPABLE) {
6212                         ecn_allowed = 1;
6213                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6214                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6215                                 struct sctp_adaptation_layer_indication ai,
6216                                                                 *aip;
6217
6218                                 phdr = sctp_get_next_param(m, offset,
6219                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6220                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6221                                 if (aip) {
6222                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6223                                         stcb->asoc.adaptation_needed = 1;
6224                                 }
6225                         }
6226                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6227                         struct sctp_asconf_addr_param lstore, *fee;
6228                         struct sctp_asconf_addrv4_param *fii;
6229                         int lptype;
6230                         struct sockaddr *lsa = NULL;
6231
6232                         stcb->asoc.peer_supports_asconf = 1;
6233                         if (plen > sizeof(lstore)) {
6234                                 return (-23);
6235                         }
6236                         phdr = sctp_get_next_param(m, offset,
6237                             (struct sctp_paramhdr *)&lstore,
6238                             min(plen, sizeof(lstore)));
6239                         if (phdr == NULL) {
6240                                 return (-24);
6241                         }
6242                         fee = (struct sctp_asconf_addr_param *)phdr;
6243                         lptype = ntohs(fee->addrp.ph.param_type);
6244                         if (lptype == SCTP_IPV4_ADDRESS) {
6245                                 if (plen !=
6246                                     sizeof(struct sctp_asconf_addrv4_param)) {
6247                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6248                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6249                                             plen);
6250                                 } else {
6251                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6252                                         sin.sin_addr.s_addr = fii->addrp.addr;
6253                                         lsa = (struct sockaddr *)&sin;
6254                                 }
6255                         } else if (lptype == SCTP_IPV6_ADDRESS) {
6256                                 if (plen !=
6257                                     sizeof(struct sctp_asconf_addr_param)) {
6258                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6259                                             (int)sizeof(struct sctp_asconf_addr_param),
6260                                             plen);
6261                                 } else {
6262                                         memcpy(sin6.sin6_addr.s6_addr,
6263                                             fee->addrp.addr,
6264                                             sizeof(fee->addrp.addr));
6265                                         lsa = (struct sockaddr *)&sin6;
6266                                 }
6267                         }
6268                         if (lsa) {
6269                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6270                         }
6271                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6272                         stcb->asoc.peer_supports_nat = 1;
6273                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6274                         /* Peer supports pr-sctp */
6275                         stcb->asoc.peer_supports_prsctp = 1;
6276                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6277                         /* A supported extension chunk */
6278                         struct sctp_supported_chunk_types_param *pr_supported;
6279                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6280                         int num_ent, i;
6281
6282                         phdr = sctp_get_next_param(m, offset,
6283                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6284                         if (phdr == NULL) {
6285                                 return (-25);
6286                         }
6287                         stcb->asoc.peer_supports_asconf = 0;
6288                         stcb->asoc.peer_supports_prsctp = 0;
6289                         stcb->asoc.peer_supports_pktdrop = 0;
6290                         stcb->asoc.peer_supports_strreset = 0;
6291                         stcb->asoc.peer_supports_nr_sack = 0;
6292                         stcb->asoc.peer_supports_auth = 0;
6293                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6294                         num_ent = plen - sizeof(struct sctp_paramhdr);
6295                         for (i = 0; i < num_ent; i++) {
6296                                 switch (pr_supported->chunk_types[i]) {
6297                                 case SCTP_ASCONF:
6298                                 case SCTP_ASCONF_ACK:
6299                                         stcb->asoc.peer_supports_asconf = 1;
6300                                         break;
6301                                 case SCTP_FORWARD_CUM_TSN:
6302                                         stcb->asoc.peer_supports_prsctp = 1;
6303                                         break;
6304                                 case SCTP_PACKET_DROPPED:
6305                                         stcb->asoc.peer_supports_pktdrop = 1;
6306                                         break;
6307                                 case SCTP_NR_SELECTIVE_ACK:
6308                                         stcb->asoc.peer_supports_nr_sack = 1;
6309                                         break;
6310                                 case SCTP_STREAM_RESET:
6311                                         stcb->asoc.peer_supports_strreset = 1;
6312                                         break;
6313                                 case SCTP_AUTHENTICATION:
6314                                         stcb->asoc.peer_supports_auth = 1;
6315                                         break;
6316                                 default:
6317                                         /* one I have not learned yet */
6318                                         break;
6319
6320                                 }
6321                         }
6322                 } else if (ptype == SCTP_RANDOM) {
6323                         if (plen > sizeof(random_store))
6324                                 break;
6325                         if (got_random) {
6326                                 /* already processed a RANDOM */
6327                                 goto next_param;
6328                         }
6329                         phdr = sctp_get_next_param(m, offset,
6330                             (struct sctp_paramhdr *)random_store,
6331                             min(sizeof(random_store), plen));
6332                         if (phdr == NULL)
6333                                 return (-26);
6334                         p_random = (struct sctp_auth_random *)phdr;
6335                         random_len = plen - sizeof(*p_random);
6336                         /* enforce the random length */
6337                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6338                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6339                                 return (-27);
6340                         }
6341                         got_random = 1;
6342                 } else if (ptype == SCTP_HMAC_LIST) {
6343                         int num_hmacs;
6344                         int i;
6345
6346                         if (plen > sizeof(hmacs_store))
6347                                 break;
6348                         if (got_hmacs) {
6349                                 /* already processed a HMAC list */
6350                                 goto next_param;
6351                         }
6352                         phdr = sctp_get_next_param(m, offset,
6353                             (struct sctp_paramhdr *)hmacs_store,
6354                             min(plen, sizeof(hmacs_store)));
6355                         if (phdr == NULL)
6356                                 return (-28);
6357                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6358                         hmacs_len = plen - sizeof(*hmacs);
6359                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6360                         /* validate the hmac list */
6361                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6362                                 return (-29);
6363                         }
6364                         if (stcb->asoc.peer_hmacs != NULL)
6365                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6366                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6367                         if (stcb->asoc.peer_hmacs != NULL) {
6368                                 for (i = 0; i < num_hmacs; i++) {
6369                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6370                                             ntohs(hmacs->hmac_ids[i]));
6371                                 }
6372                         }
6373                         got_hmacs = 1;
6374                 } else if (ptype == SCTP_CHUNK_LIST) {
6375                         int i;
6376
6377                         if (plen > sizeof(chunks_store))
6378                                 break;
6379                         if (got_chklist) {
6380                                 /* already processed a Chunks list */
6381                                 goto next_param;
6382                         }
6383                         phdr = sctp_get_next_param(m, offset,
6384                             (struct sctp_paramhdr *)chunks_store,
6385                             min(plen, sizeof(chunks_store)));
6386                         if (phdr == NULL)
6387                                 return (-30);
6388                         chunks = (struct sctp_auth_chunk_list *)phdr;
6389                         num_chunks = plen - sizeof(*chunks);
6390                         if (stcb->asoc.peer_auth_chunks != NULL)
6391                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6392                         else
6393                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6394                         for (i = 0; i < num_chunks; i++) {
6395                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6396                                     stcb->asoc.peer_auth_chunks);
6397                                 /* record asconf/asconf-ack if listed */
6398                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6399                                         saw_asconf = 1;
6400                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6401                                         saw_asconf_ack = 1;
6402
6403                         }
6404                         got_chklist = 1;
6405                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6406                             (ptype == SCTP_STATE_COOKIE) ||
6407                             (ptype == SCTP_UNRECOG_PARAM) ||
6408                             (ptype == SCTP_COOKIE_PRESERVE) ||
6409                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6410                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6411                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6412                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6413                     (ptype == SCTP_SUCCESS_REPORT)) {
6414                          /* don't care */ ;
6415                 } else {
6416                         if ((ptype & 0x8000) == 0x0000) {
6417                                 /*
6418                                  * must stop processing the rest of the
6419                                  * param's. Any report bits were handled
6420                                  * with the call to
6421                                  * sctp_arethere_unrecognized_parameters()
6422                                  * when the INIT or INIT-ACK was first seen.
6423                                  */
6424                                 break;
6425                         }
6426                 }
6427
6428 next_param:
6429                 offset += SCTP_SIZE32(plen);
6430                 if (offset >= limit) {
6431                         break;
6432                 }
6433                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6434                     sizeof(parm_buf));
6435         }
6436         /* Now check to see if we need to purge any addresses */
6437         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6438                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6439                     SCTP_ADDR_NOT_IN_ASSOC) {
6440                         /* This address has been removed from the asoc */
6441                         /* remove and free it */
6442                         stcb->asoc.numnets--;
6443                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6444                         sctp_free_remote_addr(net);
6445                         if (net == stcb->asoc.primary_destination) {
6446                                 stcb->asoc.primary_destination = NULL;
6447                                 sctp_select_primary_destination(stcb);
6448                         }
6449                 }
6450         }
6451         if (ecn_allowed == 0) {
6452                 stcb->asoc.ecn_allowed = 0;
6453         }
6454         /* validate authentication required parameters */
6455         if (got_random && got_hmacs) {
6456                 stcb->asoc.peer_supports_auth = 1;
6457         } else {
6458                 stcb->asoc.peer_supports_auth = 0;
6459         }
6460         if (!stcb->asoc.peer_supports_auth && got_chklist) {
6461                 /* peer does not support auth but sent a chunks list? */
6462                 return (-31);
6463         }
6464         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6465             !stcb->asoc.peer_supports_auth) {
6466                 /* peer supports asconf but not auth? */
6467                 return (-32);
6468         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6469             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6470                 return (-33);
6471         }
6472         /* concatenate the full random key */
6473         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6474         if (chunks != NULL) {
6475                 keylen += sizeof(*chunks) + num_chunks;
6476         }
6477         new_key = sctp_alloc_key(keylen);
6478         if (new_key != NULL) {
6479                 /* copy in the RANDOM */
6480                 if (p_random != NULL) {
6481                         keylen = sizeof(*p_random) + random_len;
6482                         bcopy(p_random, new_key->key, keylen);
6483                 }
6484                 /* append in the AUTH chunks */
6485                 if (chunks != NULL) {
6486                         bcopy(chunks, new_key->key + keylen,
6487                             sizeof(*chunks) + num_chunks);
6488                         keylen += sizeof(*chunks) + num_chunks;
6489                 }
6490                 /* append in the HMACs */
6491                 if (hmacs != NULL) {
6492                         bcopy(hmacs, new_key->key + keylen,
6493                             sizeof(*hmacs) + hmacs_len);
6494                 }
6495         } else {
6496                 /* failed to get memory for the key */
6497                 return (-34);
6498         }
6499         if (stcb->asoc.authinfo.peer_random != NULL)
6500                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6501         stcb->asoc.authinfo.peer_random = new_key;
6502         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6503         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6504
6505         return (0);
6506 }
6507
6508 int
6509 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6510     struct sctp_nets *net)
6511 {
6512         /* make sure the requested primary address exists in the assoc */
6513         if (net == NULL && sa)
6514                 net = sctp_findnet(stcb, sa);
6515
6516         if (net == NULL) {
6517                 /* didn't find the requested primary address! */
6518                 return (-1);
6519         } else {
6520                 /* set the primary address */
6521                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6522                         /* Must be confirmed, so queue to set */
6523                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6524                         return (0);
6525                 }
6526                 stcb->asoc.primary_destination = net;
6527                 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
6528                 net = TAILQ_FIRST(&stcb->asoc.nets);
6529                 if (net != stcb->asoc.primary_destination) {
6530                         /*
6531                          * first one on the list is NOT the primary
6532                          * sctp_cmpaddr() is much more efficient if the
6533                          * primary is the first on the list, make it so.
6534                          */
6535                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6536                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6537                 }
6538                 return (0);
6539         }
6540 }
6541
6542 int
6543 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait)
6544 {
6545         /*
6546          * This function serves two purposes. It will see if a TAG can be
6547          * re-used and return 1 for yes it is ok and 0 for don't use that
6548          * tag. A secondary function it will do is purge out old tags that
6549          * can be removed.
6550          */
6551         struct sctpvtaghead *chain;
6552         struct sctp_tagblock *twait_block;
6553         struct sctpasochead *head;
6554         struct sctp_tcb *stcb;
6555         int i;
6556
6557         SCTP_INP_INFO_RLOCK();
6558         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6559             SCTP_BASE_INFO(hashasocmark))];
6560         if (head == NULL) {
6561                 /* invalid vtag */
6562                 goto skip_vtag_check;
6563         }
6564         LIST_FOREACH(stcb, head, sctp_asocs) {
6565                 /*
6566                  * We choose not to lock anything here. TCB's can't be
6567                  * removed since we have the read lock, so they can't be
6568                  * freed on us, same thing for the INP. I may be wrong with
6569                  * this assumption, but we will go with it for now :-)
6570                  */
6571                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6572                         continue;
6573                 }
6574                 if (stcb->asoc.my_vtag == tag) {
6575                         /* candidate */
6576                         if (stcb->rport != rport) {
6577                                 continue;
6578                         }
6579                         if (stcb->sctp_ep->sctp_lport != lport) {
6580                                 continue;
6581                         }
6582                         /* Its a used tag set */
6583                         SCTP_INP_INFO_RUNLOCK();
6584                         return (0);
6585                 }
6586         }
6587 skip_vtag_check:
6588
6589         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6590         /* Now what about timed wait ? */
6591         if (!LIST_EMPTY(chain)) {
6592                 /*
6593                  * Block(s) are present, lets see if we have this tag in the
6594                  * list
6595                  */
6596                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6597                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6598                                 if (twait_block->vtag_block[i].v_tag == 0) {
6599                                         /* not used */
6600                                         continue;
6601                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6602                                     now->tv_sec) {
6603                                         /* Audit expires this guy */
6604                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
6605                                         twait_block->vtag_block[i].v_tag = 0;
6606                                         twait_block->vtag_block[i].lport = 0;
6607                                         twait_block->vtag_block[i].rport = 0;
6608                                 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6609                                             (twait_block->vtag_block[i].lport == lport) &&
6610                                     (twait_block->vtag_block[i].rport == rport)) {
6611                                         /* Bad tag, sorry :< */
6612                                         SCTP_INP_INFO_RUNLOCK();
6613                                         return (0);
6614                                 }
6615                         }
6616                 }
6617         }
6618         SCTP_INP_INFO_RUNLOCK();
6619         return (1);
6620 }
6621
6622
6623 static sctp_assoc_t reneged_asoc_ids[256];
6624 static uint8_t reneged_at = 0;
6625
6626
6627 static void
6628 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
6629 {
6630         /*
6631          * We must hunt this association for MBUF's past the cumack (i.e.
6632          * out of order data that we can renege on).
6633          */
6634         struct sctp_association *asoc;
6635         struct sctp_tmit_chunk *chk, *nchk;
6636         uint32_t cumulative_tsn_p1;
6637         struct sctp_queued_to_read *ctl, *nctl;
6638         int cnt, strmat;
6639         uint32_t gap, i;
6640         int fnd = 0;
6641
6642         /* We look for anything larger than the cum-ack + 1 */
6643
6644         asoc = &stcb->asoc;
6645         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6646                 /* none we can reneg on. */
6647                 return;
6648         }
6649         SCTP_STAT_INCR(sctps_protocol_drains_done);
6650         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6651         cnt = 0;
6652         /* First look in the re-assembly queue */
6653         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6654                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6655                         /* Yep it is above cum-ack */
6656                         cnt++;
6657                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6658                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6659                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6660                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6661                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6662                         if (chk->data) {
6663                                 sctp_m_freem(chk->data);
6664                                 chk->data = NULL;
6665                         }
6666                         sctp_free_a_chunk(stcb, chk);
6667                 }
6668         }
6669         /* Ok that was fun, now we will drain all the inbound streams? */
6670         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6671                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6672                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6673                                 /* Yep it is above cum-ack */
6674                                 cnt++;
6675                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6676                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6677                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6678                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6679                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6680                                 if (ctl->data) {
6681                                         sctp_m_freem(ctl->data);
6682                                         ctl->data = NULL;
6683                                 }
6684                                 sctp_free_remote_addr(ctl->whoFrom);
6685                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6686                                 SCTP_DECR_READQ_COUNT();
6687                         }
6688                 }
6689         }
6690         if (cnt) {
6691                 /* We must back down to see what the new highest is */
6692                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6693                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6694                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6695                                 asoc->highest_tsn_inside_map = i;
6696                                 fnd = 1;
6697                                 break;
6698                         }
6699                 }
6700                 if (!fnd) {
6701                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6702                 }
6703                 /*
6704                  * Question, should we go through the delivery queue? The
6705                  * only reason things are on here is the app not reading OR
6706                  * a p-d-api up. An attacker COULD send enough in to
6707                  * initiate the PD-API and then send a bunch of stuff to
6708                  * other streams... these would wind up on the delivery
6709                  * queue.. and then we would not get to them. But in order
6710                  * to do this I then have to back-track and un-deliver
6711                  * sequence numbers in streams.. el-yucko. I think for now
6712                  * we will NOT look at the delivery queue and leave it to be
6713                  * something to consider later. An alternative would be to
6714                  * abort the P-D-API with a notification and then deliver
6715                  * the data.... Or another method might be to keep track of
6716                  * how many times the situation occurs and if we see a
6717                  * possible attack underway just abort the association.
6718                  */
6719 #ifdef SCTP_DEBUG
6720                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6721 #endif
6722                 /*
6723                  * Now do we need to find a new
6724                  * asoc->highest_tsn_inside_map?
6725                  */
6726                 asoc->last_revoke_count = cnt;
6727                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6728                 /* sa_ignore NO_NULL_CHK */
6729                 sctp_send_sack(stcb);
6730                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6731                 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
6732                 reneged_at++;
6733         }
6734         /*
6735          * Another issue, in un-setting the TSN's in the mapping array we
6736          * DID NOT adjust the highest_tsn marker.  This will cause one of
6737          * two things to occur. It may cause us to do extra work in checking
6738          * for our mapping array movement. More importantly it may cause us
6739          * to SACK every datagram. This may not be a bad thing though since
6740          * we will recover once we get our cum-ack above and all this stuff
6741          * we dumped recovered.
6742          */
6743 }
6744
6745 void
6746 sctp_drain()
6747 {
6748         /*
6749          * We must walk the PCB lists for ALL associations here. The system
6750          * is LOW on MBUF's and needs help. This is where reneging will
6751          * occur. We really hope this does NOT happen!
6752          */
6753         VNET_ITERATOR_DECL(vnet_iter);
6754         VNET_LIST_RLOCK_NOSLEEP();
6755         VNET_FOREACH(vnet_iter) {
6756                 CURVNET_SET(vnet_iter);
6757                 struct sctp_inpcb *inp;
6758                 struct sctp_tcb *stcb;
6759
6760                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6761                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6762 #ifdef VIMAGE
6763                         continue;
6764 #else
6765                         return;
6766 #endif
6767                 }
6768                 SCTP_INP_INFO_RLOCK();
6769                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6770                         /* For each endpoint */
6771                         SCTP_INP_RLOCK(inp);
6772                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6773                                 /* For each association */
6774                                 SCTP_TCB_LOCK(stcb);
6775                                 sctp_drain_mbufs(inp, stcb);
6776                                 SCTP_TCB_UNLOCK(stcb);
6777                         }
6778                         SCTP_INP_RUNLOCK(inp);
6779                 }
6780                 SCTP_INP_INFO_RUNLOCK();
6781                 CURVNET_RESTORE();
6782         }
6783         VNET_LIST_RUNLOCK_NOSLEEP();
6784 }
6785
6786 /*
6787  * start a new iterator
6788  * iterates through all endpoints and associations based on the pcb_state
6789  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6790  * assocs and "ef" (optional) is executed when the iterator completes.
6791  * "inpf" (optional) is executed for each new endpoint as it is being
6792  * iterated through. inpe (optional) is called when the inp completes
6793  * its way through all the stcbs.
6794  */
6795 int
6796 sctp_initiate_iterator(inp_func inpf,
6797     asoc_func af,
6798     inp_func inpe,
6799     uint32_t pcb_state,
6800     uint32_t pcb_features,
6801     uint32_t asoc_state,
6802     void *argp,
6803     uint32_t argi,
6804     end_func ef,
6805     struct sctp_inpcb *s_inp,
6806     uint8_t chunk_output_off)
6807 {
6808         struct sctp_iterator *it = NULL;
6809
6810         if (af == NULL) {
6811                 return (-1);
6812         }
6813         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6814             SCTP_M_ITER);
6815         if (it == NULL) {
6816                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6817                 return (ENOMEM);
6818         }
6819         memset(it, 0, sizeof(*it));
6820         it->function_assoc = af;
6821         it->function_inp = inpf;
6822         if (inpf)
6823                 it->done_current_ep = 0;
6824         else
6825                 it->done_current_ep = 1;
6826         it->function_atend = ef;
6827         it->pointer = argp;
6828         it->val = argi;
6829         it->pcb_flags = pcb_state;
6830         it->pcb_features = pcb_features;
6831         it->asoc_state = asoc_state;
6832         it->function_inp_end = inpe;
6833         it->no_chunk_output = chunk_output_off;
6834         it->vn = curvnet;
6835         if (s_inp) {
6836                 /* Assume lock is held here */
6837                 it->inp = s_inp;
6838                 SCTP_INP_INCR_REF(it->inp);
6839                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
6840         } else {
6841                 SCTP_INP_INFO_RLOCK();
6842                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
6843                 if (it->inp) {
6844                         SCTP_INP_INCR_REF(it->inp);
6845                 }
6846                 SCTP_INP_INFO_RUNLOCK();
6847                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
6848
6849         }
6850         SCTP_IPI_ITERATOR_WQ_LOCK();
6851
6852         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
6853         if (sctp_it_ctl.iterator_running == 0) {
6854                 sctp_wakeup_iterator();
6855         }
6856         SCTP_IPI_ITERATOR_WQ_UNLOCK();
6857         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
6858         return (0);
6859 }