sys/netinet/sctp_pcb.c

   1 /*-
   2  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
   3  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
   4  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * a) Redistributions of source code must retain the above copyright notice,
  10  *    this list of conditions and the following disclaimer.
  11  *
  12  * b) Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the distribution.
  15  *
  16  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  30  * THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35
  36 #include <netinet/sctp_os.h>
  37 #include <sys/proc.h>
  38 #include <netinet/sctp_var.h>
  39 #include <netinet/sctp_sysctl.h>
  40 #include <netinet/sctp_pcb.h>
  41 #include <netinet/sctputil.h>
  42 #include <netinet/sctp.h>
  43 #include <netinet/sctp_header.h>
  44 #include <netinet/sctp_asconf.h>
  45 #include <netinet/sctp_output.h>
  46 #include <netinet/sctp_timer.h>
  47 #include <netinet/sctp_bsd_addr.h>
  48 #include <netinet/sctp_dtrace_define.h>
  49 #include <netinet/udp.h>
  50 #ifdef INET6
  51 #include <netinet6/ip6_var.h>
  52 #endif
  53 #include <sys/sched.h>
  54 #include <sys/smp.h>
  55 #include <sys/unistd.h>
  56
  57
  58 VNET_DEFINE(struct sctp_base_info, system_base_info);
  59
  60 /* FIX: we don't handle multiple link local scopes */
  61 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  62 #ifdef INET6
  63 int
  64 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  65 {
  66         struct sockaddr_in6 tmp_a, tmp_b;
  67
  68         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  69         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  70                 return (0);
  71         }
  72         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  73         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  74                 return (0);
  75         }
  76         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  77 }
  78
  79 #endif
  80
  81 void
  82 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  83 {
  84         /*
  85          * We really don't need to lock this, but I will just because it
  86          * does not hurt.
  87          */
  88         SCTP_INP_INFO_RLOCK();
  89         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  90         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  91         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  92         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  93         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  94         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  95         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  96         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
  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 struct sctp_vrf *
 217 sctp_find_vrf(uint32_t vrf_id)
 218 {
 219         struct sctp_vrflist *bucket;
 220         struct sctp_vrf *liste;
 221
 222         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 223         LIST_FOREACH(liste, bucket, next_vrf) {
 224                 if (vrf_id == liste->vrf_id) {
 225                         return (liste);
 226                 }
 227         }
 228         return (NULL);
 229 }
 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
 248 void
 249 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 250 {
 251         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 252                 /* We zero'd the count */
 253                 if (sctp_ifnp->vrf) {
 254                         sctp_free_vrf(sctp_ifnp->vrf);
 255                 }
 256                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 257                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 258         }
 259 }
 260
 261
 262 void
 263 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 264 {
 265         struct sctp_ifn *sctp_ifnp;
 266
 267         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 268         if (sctp_ifnp != NULL) {
 269                 sctp_ifnp->ifn_mtu = mtu;
 270         }
 271 }
 272
 273
 274 void
 275 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 276 {
 277         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 278                 /* We zero'd the count */
 279                 if (sctp_ifap->ifn_p) {
 280                         sctp_free_ifn(sctp_ifap->ifn_p);
 281                 }
 282                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 283                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 284         }
 285 }
 286
 287
 288 static void
 289 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 290 {
 291         struct sctp_ifn *found;
 292
 293         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 294         if (found == NULL) {
 295                 /* Not in the list.. sorry */
 296                 return;
 297         }
 298         if (hold_addr_lock == 0)
 299                 SCTP_IPI_ADDR_WLOCK();
 300         LIST_REMOVE(sctp_ifnp, next_bucket);
 301         LIST_REMOVE(sctp_ifnp, next_ifn);
 302         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 303             sctp_ifnp->registered_af);
 304         if (hold_addr_lock == 0)
 305                 SCTP_IPI_ADDR_WUNLOCK();
 306         /* Take away the reference, and possibly free it */
 307         sctp_free_ifn(sctp_ifnp);
 308 }
 309
 310
 311 void
 312 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 313     const char *if_name, uint32_t ifn_index)
 314 {
 315         struct sctp_vrf *vrf;
 316         struct sctp_ifa *sctp_ifap;
 317
 318         SCTP_IPI_ADDR_RLOCK();
 319         vrf = sctp_find_vrf(vrf_id);
 320         if (vrf == NULL) {
 321                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 322                 goto out;
 323
 324         }
 325         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 326         if (sctp_ifap == NULL) {
 327                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 328                 goto out;
 329         }
 330         if (sctp_ifap->ifn_p == NULL) {
 331                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 332                 goto out;
 333         }
 334         if (if_name) {
 335                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 336                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 337                             sctp_ifap->ifn_p->ifn_name, if_name);
 338                         goto out;
 339                 }
 340         } else {
 341                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 342                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 343                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 344                         goto out;
 345                 }
 346         }
 347
 348         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 349         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 350 out:
 351         SCTP_IPI_ADDR_RUNLOCK();
 352 }
 353
 354
 355 void
 356 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 357     const char *if_name, uint32_t ifn_index)
 358 {
 359         struct sctp_vrf *vrf;
 360         struct sctp_ifa *sctp_ifap;
 361
 362         SCTP_IPI_ADDR_RLOCK();
 363         vrf = sctp_find_vrf(vrf_id);
 364         if (vrf == NULL) {
 365                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 366                 goto out;
 367
 368         }
 369         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 370         if (sctp_ifap == NULL) {
 371                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 372                 goto out;
 373         }
 374         if (sctp_ifap->ifn_p == NULL) {
 375                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 376                 goto out;
 377         }
 378         if (if_name) {
 379                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 380                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 381                             sctp_ifap->ifn_p->ifn_name, if_name);
 382                         goto out;
 383                 }
 384         } else {
 385                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 386                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 387                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 388                         goto out;
 389                 }
 390         }
 391
 392         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 393         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 394 out:
 395         SCTP_IPI_ADDR_RUNLOCK();
 396 }
 397
 398
 399 /*-
 400  * Add an ifa to an ifn.
 401  * Register the interface as necessary.
 402  * NOTE: ADDR write lock MUST be held.
 403  */
 404 static void
 405 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 406 {
 407         int ifa_af;
 408
 409         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 410         sctp_ifap->ifn_p = sctp_ifnp;
 411         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 412         /* update address counts */
 413         sctp_ifnp->ifa_count++;
 414         ifa_af = sctp_ifap->address.sa.sa_family;
 415         switch (ifa_af) {
 416 #ifdef INET
 417         case AF_INET:
 418                 sctp_ifnp->num_v4++;
 419                 break;
 420 #endif
 421 #ifdef INET6
 422         case AF_INET6:
 423                 sctp_ifnp->num_v6++;
 424                 break;
 425 #endif
 426         default:
 427                 break;
 428         }
 429         if (sctp_ifnp->ifa_count == 1) {
 430                 /* register the new interface */
 431                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 432                 sctp_ifnp->registered_af = ifa_af;
 433         }
 434 }
 435
 436
 437 /*-
 438  * Remove an ifa from its ifn.
 439  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 440  * the interface based on the remaining address families left.
 441  * NOTE: ADDR write lock MUST be held.
 442  */
 443 static void
 444 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 445 {
 446         LIST_REMOVE(sctp_ifap, next_ifa);
 447         if (sctp_ifap->ifn_p) {
 448                 /* update address counts */
 449                 sctp_ifap->ifn_p->ifa_count--;
 450                 switch (sctp_ifap->address.sa.sa_family) {
 451 #ifdef INET
 452                 case AF_INET:
 453                         sctp_ifap->ifn_p->num_v4--;
 454                         break;
 455 #endif
 456 #ifdef INET6
 457                 case AF_INET6:
 458                         sctp_ifap->ifn_p->num_v6--;
 459                         break;
 460 #endif
 461                 default:
 462                         break;
 463                 }
 464
 465                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 466                         /* remove the ifn, possibly freeing it */
 467                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 468                 } else {
 469                         /* re-register address family type, if needed */
 470                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 471                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 472                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 473                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 474                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 475                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 476                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 477                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 478                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 479                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 480                         }
 481                         /* free the ifn refcount */
 482                         sctp_free_ifn(sctp_ifap->ifn_p);
 483                 }
 484                 sctp_ifap->ifn_p = NULL;
 485         }
 486 }
 487
 488
 489 struct sctp_ifa *
 490 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 491     uint32_t ifn_type, const char *if_name, void *ifa,
 492     struct sockaddr *addr, uint32_t ifa_flags,
 493     int dynamic_add)
 494 {
 495         struct sctp_vrf *vrf;
 496         struct sctp_ifn *sctp_ifnp = NULL;
 497         struct sctp_ifa *sctp_ifap = NULL;
 498         struct sctp_ifalist *hash_addr_head;
 499         struct sctp_ifnlist *hash_ifn_head;
 500         uint32_t hash_of_addr;
 501         int new_ifn_af = 0;
 502
 503 #ifdef SCTP_DEBUG
 504         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 505         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 506 #endif
 507         SCTP_IPI_ADDR_WLOCK();
 508         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 509         if (sctp_ifnp) {
 510                 vrf = sctp_ifnp->vrf;
 511         } else {
 512                 vrf = sctp_find_vrf(vrf_id);
 513                 if (vrf == NULL) {
 514                         vrf = sctp_allocate_vrf(vrf_id);
 515                         if (vrf == NULL) {
 516                                 SCTP_IPI_ADDR_WUNLOCK();
 517                                 return (NULL);
 518                         }
 519                 }
 520         }
 521         if (sctp_ifnp == NULL) {
 522                 /*
 523                  * build one and add it, can't hold lock until after malloc
 524                  * done though.
 525                  */
 526                 SCTP_IPI_ADDR_WUNLOCK();
 527                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 528                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 529                 if (sctp_ifnp == NULL) {
 530 #ifdef INVARIANTS
 531                         panic("No memory for IFN");
 532 #endif
 533                         return (NULL);
 534                 }
 535                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 536                 sctp_ifnp->ifn_index = ifn_index;
 537                 sctp_ifnp->ifn_p = ifn;
 538                 sctp_ifnp->ifn_type = ifn_type;
 539                 sctp_ifnp->refcount = 0;
 540                 sctp_ifnp->vrf = vrf;
 541                 atomic_add_int(&vrf->refcount, 1);
 542                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 543                 if (if_name != NULL) {
 544                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
 545                 } else {
 546                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
 547                 }
 548                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 549                 LIST_INIT(&sctp_ifnp->ifalist);
 550                 SCTP_IPI_ADDR_WLOCK();
 551                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 552                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 553                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 554                 new_ifn_af = 1;
 555         }
 556         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 557         if (sctp_ifap) {
 558                 /* Hmm, it already exists? */
 559                 if ((sctp_ifap->ifn_p) &&
 560                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 561                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 562                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 563                             (void *)sctp_ifap);
 564                         if (new_ifn_af) {
 565                                 /* Remove the created one that we don't want */
 566                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 567                         }
 568                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 569                                 /* easy to solve, just switch back to active */
 570                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 571                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 572                                 sctp_ifap->ifn_p = sctp_ifnp;
 573                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 574                         }
 575         exit_stage_left:
 576                         SCTP_IPI_ADDR_WUNLOCK();
 577                         return (sctp_ifap);
 578                 } else {
 579                         if (sctp_ifap->ifn_p) {
 580                                 /*
 581                                  * The last IFN gets the address, remove the
 582                                  * old one
 583                                  */
 584                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 585                                     (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 586                                     sctp_ifap->ifn_p->ifn_index, if_name,
 587                                     ifn_index);
 588                                 /* remove the address from the old ifn */
 589                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 590                                 /* move the address over to the new ifn */
 591                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 592                                 goto exit_stage_left;
 593                         } else {
 594                                 /* repair ifnp which was NULL ? */
 595                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 596                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 597                                     (void *)sctp_ifnp, (void *)sctp_ifap);
 598                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 599                         }
 600                         goto exit_stage_left;
 601                 }
 602         }
 603         SCTP_IPI_ADDR_WUNLOCK();
 604         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 605         if (sctp_ifap == NULL) {
 606 #ifdef INVARIANTS
 607                 panic("No memory for IFA");
 608 #endif
 609                 return (NULL);
 610         }
 611         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 612         sctp_ifap->ifn_p = sctp_ifnp;
 613         atomic_add_int(&sctp_ifnp->refcount, 1);
 614         sctp_ifap->vrf_id = vrf_id;
 615         sctp_ifap->ifa = ifa;
 616         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 617         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 618         sctp_ifap->flags = ifa_flags;
 619         /* Set scope */
 620         switch (sctp_ifap->address.sa.sa_family) {
 621 #ifdef INET
 622         case AF_INET:
 623                 {
 624                         struct sockaddr_in *sin;
 625
 626                         sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
 627                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 628                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 629                                 sctp_ifap->src_is_loop = 1;
 630                         }
 631                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 632                                 sctp_ifap->src_is_priv = 1;
 633                         }
 634                         sctp_ifnp->num_v4++;
 635                         if (new_ifn_af)
 636                                 new_ifn_af = AF_INET;
 637                         break;
 638                 }
 639 #endif
 640 #ifdef INET6
 641         case AF_INET6:
 642                 {
 643                         /* ok to use deprecated addresses? */
 644                         struct sockaddr_in6 *sin6;
 645
 646                         sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
 647                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 648                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 649                                 sctp_ifap->src_is_loop = 1;
 650                         }
 651                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 652                                 sctp_ifap->src_is_priv = 1;
 653                         }
 654                         sctp_ifnp->num_v6++;
 655                         if (new_ifn_af)
 656                                 new_ifn_af = AF_INET6;
 657                         break;
 658                 }
 659 #endif
 660         default:
 661                 new_ifn_af = 0;
 662                 break;
 663         }
 664         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 665
 666         if ((sctp_ifap->src_is_priv == 0) &&
 667             (sctp_ifap->src_is_loop == 0)) {
 668                 sctp_ifap->src_is_glob = 1;
 669         }
 670         SCTP_IPI_ADDR_WLOCK();
 671         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 672         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 673         sctp_ifap->refcount = 1;
 674         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 675         sctp_ifnp->ifa_count++;
 676         vrf->total_ifa_count++;
 677         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 678         if (new_ifn_af) {
 679                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 680                 sctp_ifnp->registered_af = new_ifn_af;
 681         }
 682         SCTP_IPI_ADDR_WUNLOCK();
 683         if (dynamic_add) {
 684                 /*
 685                  * Bump up the refcount so that when the timer completes it
 686                  * will drop back down.
 687                  */
 688                 struct sctp_laddr *wi;
 689
 690                 atomic_add_int(&sctp_ifap->refcount, 1);
 691                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 692                 if (wi == NULL) {
 693                         /*
 694                          * Gak, what can we do? We have lost an address
 695                          * change can you say HOSED?
 696                          */
 697                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 698                         /* Opps, must decrement the count */
 699                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 700                             if_name);
 701                         return (NULL);
 702                 }
 703                 SCTP_INCR_LADDR_COUNT();
 704                 bzero(wi, sizeof(*wi));
 705                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 706                 wi->ifa = sctp_ifap;
 707                 wi->action = SCTP_ADD_IP_ADDRESS;
 708
 709                 SCTP_WQ_ADDR_LOCK();
 710                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 711                 SCTP_WQ_ADDR_UNLOCK();
 712
 713                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 714                     (struct sctp_inpcb *)NULL,
 715                     (struct sctp_tcb *)NULL,
 716                     (struct sctp_nets *)NULL);
 717         } else {
 718                 /* it's ready for use */
 719                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 720         }
 721         return (sctp_ifap);
 722 }
 723
 724 void
 725 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 726     uint32_t ifn_index, const char *if_name)
 727 {
 728         struct sctp_vrf *vrf;
 729         struct sctp_ifa *sctp_ifap = NULL;
 730
 731         SCTP_IPI_ADDR_WLOCK();
 732         vrf = sctp_find_vrf(vrf_id);
 733         if (vrf == NULL) {
 734                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 735                 goto out_now;
 736         }
 737 #ifdef SCTP_DEBUG
 738         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 739         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 740 #endif
 741         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 742         if (sctp_ifap) {
 743                 /* Validate the delete */
 744                 if (sctp_ifap->ifn_p) {
 745                         int valid = 0;
 746
 747                         /*-
 748                          * The name has priority over the ifn_index
 749                          * if its given. We do this especially for
 750                          * panda who might recycle indexes fast.
 751                          */
 752                         if (if_name) {
 753                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 754                                         /* They match its a correct delete */
 755                                         valid = 1;
 756                                 }
 757                         }
 758                         if (!valid) {
 759                                 /* last ditch check ifn_index */
 760                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 761                                         valid = 1;
 762                                 }
 763                         }
 764                         if (!valid) {
 765                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 766                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 767                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 768                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 769                                 SCTP_IPI_ADDR_WUNLOCK();
 770                                 return;
 771                         }
 772                 }
 773                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
 774                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 775                 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
 776                 vrf->total_ifa_count--;
 777                 LIST_REMOVE(sctp_ifap, next_bucket);
 778                 sctp_remove_ifa_from_ifn(sctp_ifap);
 779         }
 780 #ifdef SCTP_DEBUG
 781         else {
 782                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 783                     ifn_index);
 784                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 785         }
 786 #endif
 787
 788 out_now:
 789         SCTP_IPI_ADDR_WUNLOCK();
 790         if (sctp_ifap) {
 791                 struct sctp_laddr *wi;
 792
 793                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 794                 if (wi == NULL) {
 795                         /*
 796                          * Gak, what can we do? We have lost an address
 797                          * change can you say HOSED?
 798                          */
 799                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 800
 801                         /* Oops, must decrement the count */
 802                         sctp_free_ifa(sctp_ifap);
 803                         return;
 804                 }
 805                 SCTP_INCR_LADDR_COUNT();
 806                 bzero(wi, sizeof(*wi));
 807                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 808                 wi->ifa = sctp_ifap;
 809                 wi->action = SCTP_DEL_IP_ADDRESS;
 810                 SCTP_WQ_ADDR_LOCK();
 811                 /*
 812                  * Should this really be a tailq? As it is we will process
 813                  * the newest first :-0
 814                  */
 815                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 816                 SCTP_WQ_ADDR_UNLOCK();
 817
 818                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 819                     (struct sctp_inpcb *)NULL,
 820                     (struct sctp_tcb *)NULL,
 821                     (struct sctp_nets *)NULL);
 822         }
 823         return;
 824 }
 825
 826
 827 static int
 828 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
 829 {
 830         int loopback_scope, ipv4_local_scope, local_scope, site_scope;
 831         int ipv4_addr_legal, ipv6_addr_legal;
 832         struct sctp_vrf *vrf;
 833         struct sctp_ifn *sctp_ifn;
 834         struct sctp_ifa *sctp_ifa;
 835
 836         loopback_scope = stcb->asoc.scope.loopback_scope;
 837         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
 838         local_scope = stcb->asoc.scope.local_scope;
 839         site_scope = stcb->asoc.scope.site_scope;
 840         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
 841         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
 842
 843         SCTP_IPI_ADDR_RLOCK();
 844         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
 845         if (vrf == NULL) {
 846                 /* no vrf, no addresses */
 847                 SCTP_IPI_ADDR_RUNLOCK();
 848                 return (0);
 849         }
 850         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 851                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 852                         if ((loopback_scope == 0) &&
 853                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 854                                 continue;
 855                         }
 856                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 857                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
 858                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
 859                                         /*
 860                                          * We allow pending addresses, where
 861                                          * we have sent an asconf-add to be
 862                                          * considered valid.
 863                                          */
 864                                         continue;
 865                                 }
 866                                 switch (sctp_ifa->address.sa.sa_family) {
 867 #ifdef INET
 868                                 case AF_INET:
 869                                         if (ipv4_addr_legal) {
 870                                                 struct sockaddr_in *sin,
 871                                                            *rsin;
 872
 873                                                 sin = &sctp_ifa->address.sin;
 874                                                 rsin = (struct sockaddr_in *)to;
 875                                                 if ((ipv4_local_scope == 0) &&
 876                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 877                                                         continue;
 878                                                 }
 879                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 880                                                         SCTP_IPI_ADDR_RUNLOCK();
 881                                                         return (1);
 882                                                 }
 883                                         }
 884                                         break;
 885 #endif
 886 #ifdef INET6
 887                                 case AF_INET6:
 888                                         if (ipv6_addr_legal) {
 889                                                 struct sockaddr_in6 *sin6,
 890                                                             *rsin6;
 891
 892                                                 sin6 = &sctp_ifa->address.sin6;
 893                                                 rsin6 = (struct sockaddr_in6 *)to;
 894                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 895                                                         if (local_scope == 0)
 896                                                                 continue;
 897                                                         if (sin6->sin6_scope_id == 0) {
 898                                                                 if (sa6_recoverscope(sin6) != 0)
 899                                                                         continue;
 900                                                         }
 901                                                 }
 902                                                 if ((site_scope == 0) &&
 903                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
 904                                                         continue;
 905                                                 }
 906                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 907                                                         SCTP_IPI_ADDR_RUNLOCK();
 908                                                         return (1);
 909                                                 }
 910                                         }
 911                                         break;
 912 #endif
 913                                 default:
 914                                         /* TSNH */
 915                                         break;
 916                                 }
 917                         }
 918                 }
 919         } else {
 920                 struct sctp_laddr *laddr;
 921
 922                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
 923                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 924                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 925                                 continue;
 926                         }
 927                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
 928                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
 929                                 /*
 930                                  * We allow pending addresses, where we have
 931                                  * sent an asconf-add to be considered
 932                                  * valid.
 933                                  */
 934                                 continue;
 935                         }
 936                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
 937                                 continue;
 938                         }
 939                         switch (to->sa_family) {
 940 #ifdef INET
 941                         case AF_INET:
 942                                 {
 943                                         struct sockaddr_in *sin, *rsin;
 944
 945                                         sin = (struct sockaddr_in *)&laddr->ifa->address.sin;
 946                                         rsin = (struct sockaddr_in *)to;
 947                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 948                                                 SCTP_IPI_ADDR_RUNLOCK();
 949                                                 return (1);
 950                                         }
 951                                         break;
 952                                 }
 953 #endif
 954 #ifdef INET6
 955                         case AF_INET6:
 956                                 {
 957                                         struct sockaddr_in6 *sin6, *rsin6;
 958
 959                                         sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6;
 960                                         rsin6 = (struct sockaddr_in6 *)to;
 961                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 962                                                 SCTP_IPI_ADDR_RUNLOCK();
 963                                                 return (1);
 964                                         }
 965                                         break;
 966                                 }
 967
 968 #endif
 969                         default:
 970                                 /* TSNH */
 971                                 break;
 972                         }
 973
 974                 }
 975         }
 976         SCTP_IPI_ADDR_RUNLOCK();
 977         return (0);
 978 }
 979
 980
 981 static struct sctp_tcb *
 982 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 983     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
 984 {
 985         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
 986         /*
 987          * If we support the TCP model, then we must now dig through to see
 988          * if we can find our endpoint in the list of tcp ep's.
 989          */
 990         uint16_t lport, rport;
 991         struct sctppcbhead *ephead;
 992         struct sctp_inpcb *inp;
 993         struct sctp_laddr *laddr;
 994         struct sctp_tcb *stcb;
 995         struct sctp_nets *net;
 996
 997         if ((to == NULL) || (from == NULL)) {
 998                 return (NULL);
 999         }
1000         switch (to->sa_family) {
1001 #ifdef INET
1002         case AF_INET:
1003                 if (from->sa_family == AF_INET) {
1004                         lport = ((struct sockaddr_in *)to)->sin_port;
1005                         rport = ((struct sockaddr_in *)from)->sin_port;
1006                 } else {
1007                         return (NULL);
1008                 }
1009                 break;
1010 #endif
1011 #ifdef INET6
1012         case AF_INET6:
1013                 if (from->sa_family == AF_INET6) {
1014                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
1015                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
1016                 } else {
1017                         return (NULL);
1018                 }
1019                 break;
1020 #endif
1021         default:
1022                 return (NULL);
1023         }
1024         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1025         /*
1026          * Ok now for each of the guys in this bucket we must look and see:
1027          * - Does the remote port match. - Does there single association's
1028          * addresses match this address (to). If so we update p_ep to point
1029          * to this ep and return the tcb from it.
1030          */
1031         LIST_FOREACH(inp, ephead, sctp_hash) {
1032                 SCTP_INP_RLOCK(inp);
1033                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1034                         SCTP_INP_RUNLOCK(inp);
1035                         continue;
1036                 }
1037                 if (lport != inp->sctp_lport) {
1038                         SCTP_INP_RUNLOCK(inp);
1039                         continue;
1040                 }
1041                 if (inp->def_vrf_id != vrf_id) {
1042                         SCTP_INP_RUNLOCK(inp);
1043                         continue;
1044                 }
1045                 /* check to see if the ep has one of the addresses */
1046                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1047                         /* We are NOT bound all, so look further */
1048                         int match = 0;
1049
1050                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1051
1052                                 if (laddr->ifa == NULL) {
1053                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
1054                                         continue;
1055                                 }
1056                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1057                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1058                                         continue;
1059                                 }
1060                                 if (laddr->ifa->address.sa.sa_family ==
1061                                     to->sa_family) {
1062                                         /* see if it matches */
1063 #ifdef INET
1064                                         if (from->sa_family == AF_INET) {
1065                                                 struct sockaddr_in *intf_addr,
1066                                                            *sin;
1067
1068                                                 intf_addr = &laddr->ifa->address.sin;
1069                                                 sin = (struct sockaddr_in *)to;
1070                                                 if (sin->sin_addr.s_addr ==
1071                                                     intf_addr->sin_addr.s_addr) {
1072                                                         match = 1;
1073                                                         break;
1074                                                 }
1075                                         }
1076 #endif
1077 #ifdef INET6
1078                                         if (from->sa_family == AF_INET6) {
1079                                                 struct sockaddr_in6 *intf_addr6;
1080                                                 struct sockaddr_in6 *sin6;
1081
1082                                                 sin6 = (struct sockaddr_in6 *)
1083                                                     to;
1084                                                 intf_addr6 = &laddr->ifa->address.sin6;
1085
1086                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1087                                                     intf_addr6)) {
1088                                                         match = 1;
1089                                                         break;
1090                                                 }
1091                                         }
1092 #endif
1093                                 }
1094                         }
1095                         if (match == 0) {
1096                                 /* This endpoint does not have this address */
1097                                 SCTP_INP_RUNLOCK(inp);
1098                                 continue;
1099                         }
1100                 }
1101                 /*
1102                  * Ok if we hit here the ep has the address, does it hold
1103                  * the tcb?
1104                  */
1105                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1106                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1107                 if (stcb == NULL) {
1108                         SCTP_INP_RUNLOCK(inp);
1109                         continue;
1110                 }
1111                 SCTP_TCB_LOCK(stcb);
1112                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1113                         SCTP_TCB_UNLOCK(stcb);
1114                         SCTP_INP_RUNLOCK(inp);
1115                         continue;
1116                 }
1117                 if (stcb->rport != rport) {
1118                         /* remote port does not match. */
1119                         SCTP_TCB_UNLOCK(stcb);
1120                         SCTP_INP_RUNLOCK(inp);
1121                         continue;
1122                 }
1123                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1124                         SCTP_TCB_UNLOCK(stcb);
1125                         SCTP_INP_RUNLOCK(inp);
1126                         continue;
1127                 }
1128                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1129                         SCTP_TCB_UNLOCK(stcb);
1130                         SCTP_INP_RUNLOCK(inp);
1131                         continue;
1132                 }
1133                 /* Does this TCB have a matching address? */
1134                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1135
1136                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1137                                 /* not the same family, can't be a match */
1138                                 continue;
1139                         }
1140                         switch (from->sa_family) {
1141 #ifdef INET
1142                         case AF_INET:
1143                                 {
1144                                         struct sockaddr_in *sin, *rsin;
1145
1146                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
1147                                         rsin = (struct sockaddr_in *)from;
1148                                         if (sin->sin_addr.s_addr ==
1149                                             rsin->sin_addr.s_addr) {
1150                                                 /* found it */
1151                                                 if (netp != NULL) {
1152                                                         *netp = net;
1153                                                 }
1154                                                 /*
1155                                                  * Update the endpoint
1156                                                  * pointer
1157                                                  */
1158                                                 *inp_p = inp;
1159                                                 SCTP_INP_RUNLOCK(inp);
1160                                                 return (stcb);
1161                                         }
1162                                         break;
1163                                 }
1164 #endif
1165 #ifdef INET6
1166                         case AF_INET6:
1167                                 {
1168                                         struct sockaddr_in6 *sin6, *rsin6;
1169
1170                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1171                                         rsin6 = (struct sockaddr_in6 *)from;
1172                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1173                                             rsin6)) {
1174                                                 /* found it */
1175                                                 if (netp != NULL) {
1176                                                         *netp = net;
1177                                                 }
1178                                                 /*
1179                                                  * Update the endpoint
1180                                                  * pointer
1181                                                  */
1182                                                 *inp_p = inp;
1183                                                 SCTP_INP_RUNLOCK(inp);
1184                                                 return (stcb);
1185                                         }
1186                                         break;
1187                                 }
1188 #endif
1189                         default:
1190                                 /* TSNH */
1191                                 break;
1192                         }
1193                 }
1194                 SCTP_TCB_UNLOCK(stcb);
1195                 SCTP_INP_RUNLOCK(inp);
1196         }
1197         return (NULL);
1198 }
1199
1200
1201 /*
1202  * rules for use
1203  *
1204  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1205  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1206  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1207  * NULL.
1208  */
1209
1210 struct sctp_tcb *
1211 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1212     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1213 {
1214         struct sctpasochead *head;
1215         struct sctp_inpcb *inp;
1216         struct sctp_tcb *stcb = NULL;
1217         struct sctp_nets *net;
1218         uint16_t rport;
1219
1220         inp = *inp_p;
1221         switch (remote->sa_family) {
1222 #ifdef INET
1223         case AF_INET:
1224                 rport = (((struct sockaddr_in *)remote)->sin_port);
1225                 break;
1226 #endif
1227 #ifdef INET6
1228         case AF_INET6:
1229                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1230                 break;
1231 #endif
1232         default:
1233                 return (NULL);
1234         }
1235         if (locked_tcb) {
1236                 /*
1237                  * UN-lock so we can do proper locking here this occurs when
1238                  * called from load_addresses_from_init.
1239                  */
1240                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1241                 SCTP_TCB_UNLOCK(locked_tcb);
1242         }
1243         SCTP_INP_INFO_RLOCK();
1244         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1245             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1246                 /*-
1247                  * Now either this guy is our listener or it's the
1248                  * connector. If it is the one that issued the connect, then
1249                  * it's only chance is to be the first TCB in the list. If
1250                  * it is the acceptor, then do the special_lookup to hash
1251                  * and find the real inp.
1252                  */
1253                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1254                         /* to is peer addr, from is my addr */
1255                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1256                             netp, inp->def_vrf_id);
1257                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1258                                 /* we have a locked tcb, lower refcount */
1259                                 SCTP_INP_DECR_REF(inp);
1260                         }
1261                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1262                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1263                                 SCTP_TCB_LOCK(locked_tcb);
1264                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1265                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1266                         }
1267                         SCTP_INP_INFO_RUNLOCK();
1268                         return (stcb);
1269                 } else {
1270                         SCTP_INP_WLOCK(inp);
1271                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1272                                 goto null_return;
1273                         }
1274                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1275                         if (stcb == NULL) {
1276                                 goto null_return;
1277                         }
1278                         SCTP_TCB_LOCK(stcb);
1279
1280                         if (stcb->rport != rport) {
1281                                 /* remote port does not match. */
1282                                 SCTP_TCB_UNLOCK(stcb);
1283                                 goto null_return;
1284                         }
1285                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1286                                 SCTP_TCB_UNLOCK(stcb);
1287                                 goto null_return;
1288                         }
1289                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1290                                 SCTP_TCB_UNLOCK(stcb);
1291                                 goto null_return;
1292                         }
1293                         /* now look at the list of remote addresses */
1294                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1295 #ifdef INVARIANTS
1296                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1297                                         panic("Corrupt net list");
1298                                 }
1299 #endif
1300                                 if (net->ro._l_addr.sa.sa_family !=
1301                                     remote->sa_family) {
1302                                         /* not the same family */
1303                                         continue;
1304                                 }
1305                                 switch (remote->sa_family) {
1306 #ifdef INET
1307                                 case AF_INET:
1308                                         {
1309                                                 struct sockaddr_in *sin,
1310                                                            *rsin;
1311
1312                                                 sin = (struct sockaddr_in *)
1313                                                     &net->ro._l_addr;
1314                                                 rsin = (struct sockaddr_in *)remote;
1315                                                 if (sin->sin_addr.s_addr ==
1316                                                     rsin->sin_addr.s_addr) {
1317                                                         /* found it */
1318                                                         if (netp != NULL) {
1319                                                                 *netp = net;
1320                                                         }
1321                                                         if (locked_tcb == NULL) {
1322                                                                 SCTP_INP_DECR_REF(inp);
1323                                                         } else if (locked_tcb != stcb) {
1324                                                                 SCTP_TCB_LOCK(locked_tcb);
1325                                                         }
1326                                                         if (locked_tcb) {
1327                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1328                                                         }
1329                                                         SCTP_INP_WUNLOCK(inp);
1330                                                         SCTP_INP_INFO_RUNLOCK();
1331                                                         return (stcb);
1332                                                 }
1333                                                 break;
1334                                         }
1335 #endif
1336 #ifdef INET6
1337                                 case AF_INET6:
1338                                         {
1339                                                 struct sockaddr_in6 *sin6,
1340                                                             *rsin6;
1341
1342                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1343                                                 rsin6 = (struct sockaddr_in6 *)remote;
1344                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1345                                                     rsin6)) {
1346                                                         /* found it */
1347                                                         if (netp != NULL) {
1348                                                                 *netp = net;
1349                                                         }
1350                                                         if (locked_tcb == NULL) {
1351                                                                 SCTP_INP_DECR_REF(inp);
1352                                                         } else if (locked_tcb != stcb) {
1353                                                                 SCTP_TCB_LOCK(locked_tcb);
1354                                                         }
1355                                                         if (locked_tcb) {
1356                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1357                                                         }
1358                                                         SCTP_INP_WUNLOCK(inp);
1359                                                         SCTP_INP_INFO_RUNLOCK();
1360                                                         return (stcb);
1361                                                 }
1362                                                 break;
1363                                         }
1364 #endif
1365                                 default:
1366                                         /* TSNH */
1367                                         break;
1368                                 }
1369                         }
1370                         SCTP_TCB_UNLOCK(stcb);
1371                 }
1372         } else {
1373                 SCTP_INP_WLOCK(inp);
1374                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1375                         goto null_return;
1376                 }
1377                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1378                     inp->sctp_hashmark)];
1379                 if (head == NULL) {
1380                         goto null_return;
1381                 }
1382                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1383                         if (stcb->rport != rport) {
1384                                 /* remote port does not match */
1385                                 continue;
1386                         }
1387                         SCTP_TCB_LOCK(stcb);
1388                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1389                                 SCTP_TCB_UNLOCK(stcb);
1390                                 continue;
1391                         }
1392                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1393                                 SCTP_TCB_UNLOCK(stcb);
1394                                 continue;
1395                         }
1396                         /* now look at the list of remote addresses */
1397                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1398 #ifdef INVARIANTS
1399                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1400                                         panic("Corrupt net list");
1401                                 }
1402 #endif
1403                                 if (net->ro._l_addr.sa.sa_family !=
1404                                     remote->sa_family) {
1405                                         /* not the same family */
1406                                         continue;
1407                                 }
1408                                 switch (remote->sa_family) {
1409 #ifdef INET
1410                                 case AF_INET:
1411                                         {
1412                                                 struct sockaddr_in *sin,
1413                                                            *rsin;
1414
1415                                                 sin = (struct sockaddr_in *)
1416                                                     &net->ro._l_addr;
1417                                                 rsin = (struct sockaddr_in *)remote;
1418                                                 if (sin->sin_addr.s_addr ==
1419                                                     rsin->sin_addr.s_addr) {
1420                                                         /* found it */
1421                                                         if (netp != NULL) {
1422                                                                 *netp = net;
1423                                                         }
1424                                                         if (locked_tcb == NULL) {
1425                                                                 SCTP_INP_DECR_REF(inp);
1426                                                         } else if (locked_tcb != stcb) {
1427                                                                 SCTP_TCB_LOCK(locked_tcb);
1428                                                         }
1429                                                         if (locked_tcb) {
1430                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1431                                                         }
1432                                                         SCTP_INP_WUNLOCK(inp);
1433                                                         SCTP_INP_INFO_RUNLOCK();
1434                                                         return (stcb);
1435                                                 }
1436                                                 break;
1437                                         }
1438 #endif
1439 #ifdef INET6
1440                                 case AF_INET6:
1441                                         {
1442                                                 struct sockaddr_in6 *sin6,
1443                                                             *rsin6;
1444
1445                                                 sin6 = (struct sockaddr_in6 *)
1446                                                     &net->ro._l_addr;
1447                                                 rsin6 = (struct sockaddr_in6 *)remote;
1448                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1449                                                     rsin6)) {
1450                                                         /* found it */
1451                                                         if (netp != NULL) {
1452                                                                 *netp = net;
1453                                                         }
1454                                                         if (locked_tcb == NULL) {
1455                                                                 SCTP_INP_DECR_REF(inp);
1456                                                         } else if (locked_tcb != stcb) {
1457                                                                 SCTP_TCB_LOCK(locked_tcb);
1458                                                         }
1459                                                         if (locked_tcb) {
1460                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1461                                                         }
1462                                                         SCTP_INP_WUNLOCK(inp);
1463                                                         SCTP_INP_INFO_RUNLOCK();
1464                                                         return (stcb);
1465                                                 }
1466                                                 break;
1467                                         }
1468 #endif
1469                                 default:
1470                                         /* TSNH */
1471                                         break;
1472                                 }
1473                         }
1474                         SCTP_TCB_UNLOCK(stcb);
1475                 }
1476         }
1477 null_return:
1478         /* clean up for returning null */
1479         if (locked_tcb) {
1480                 SCTP_TCB_LOCK(locked_tcb);
1481                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1482         }
1483         SCTP_INP_WUNLOCK(inp);
1484         SCTP_INP_INFO_RUNLOCK();
1485         /* not found */
1486         return (NULL);
1487 }
1488
1489
1490 /*
1491  * Find an association for a specific endpoint using the association id given
1492  * out in the COMM_UP notification
1493  */
1494 struct sctp_tcb *
1495 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1496 {
1497         /*
1498          * Use my the assoc_id to find a endpoint
1499          */
1500         struct sctpasochead *head;
1501         struct sctp_tcb *stcb;
1502         uint32_t id;
1503
1504         if (inp == NULL) {
1505                 SCTP_PRINTF("TSNH ep_associd\n");
1506                 return (NULL);
1507         }
1508         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1509                 SCTP_PRINTF("TSNH ep_associd0\n");
1510                 return (NULL);
1511         }
1512         id = (uint32_t) asoc_id;
1513         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1514         if (head == NULL) {
1515                 /* invalid id TSNH */
1516                 SCTP_PRINTF("TSNH ep_associd1\n");
1517                 return (NULL);
1518         }
1519         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1520                 if (stcb->asoc.assoc_id == id) {
1521                         if (inp != stcb->sctp_ep) {
1522                                 /*
1523                                  * some other guy has the same id active (id
1524                                  * collision ??).
1525                                  */
1526                                 SCTP_PRINTF("TSNH ep_associd2\n");
1527                                 continue;
1528                         }
1529                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1530                                 continue;
1531                         }
1532                         if (want_lock) {
1533                                 SCTP_TCB_LOCK(stcb);
1534                         }
1535                         return (stcb);
1536                 }
1537         }
1538         return (NULL);
1539 }
1540
1541
1542 struct sctp_tcb *
1543 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1544 {
1545         struct sctp_tcb *stcb;
1546
1547         SCTP_INP_RLOCK(inp);
1548         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1549         SCTP_INP_RUNLOCK(inp);
1550         return (stcb);
1551 }
1552
1553
1554 /*
1555  * Endpoint probe expects that the INP_INFO is locked.
1556  */
1557 static struct sctp_inpcb *
1558 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1559     uint16_t lport, uint32_t vrf_id)
1560 {
1561         struct sctp_inpcb *inp;
1562         struct sctp_laddr *laddr;
1563
1564 #ifdef INET
1565         struct sockaddr_in *sin;
1566
1567 #endif
1568 #ifdef INET6
1569         struct sockaddr_in6 *sin6;
1570         struct sockaddr_in6 *intf_addr6;
1571
1572 #endif
1573         int fnd;
1574
1575 #ifdef INET
1576         sin = NULL;
1577 #endif
1578 #ifdef INET6
1579         sin6 = NULL;
1580 #endif
1581         switch (nam->sa_family) {
1582 #ifdef INET
1583         case AF_INET:
1584                 sin = (struct sockaddr_in *)nam;
1585                 break;
1586 #endif
1587 #ifdef INET6
1588         case AF_INET6:
1589                 sin6 = (struct sockaddr_in6 *)nam;
1590                 break;
1591 #endif
1592         default:
1593                 /* unsupported family */
1594                 return (NULL);
1595         }
1596
1597         if (head == NULL)
1598                 return (NULL);
1599
1600         LIST_FOREACH(inp, head, sctp_hash) {
1601                 SCTP_INP_RLOCK(inp);
1602                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1603                         SCTP_INP_RUNLOCK(inp);
1604                         continue;
1605                 }
1606                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1607                     (inp->sctp_lport == lport)) {
1608                         /* got it */
1609 #ifdef INET
1610                         if ((nam->sa_family == AF_INET) &&
1611                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1612                             SCTP_IPV6_V6ONLY(inp)) {
1613                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1614                                 SCTP_INP_RUNLOCK(inp);
1615                                 continue;
1616                         }
1617 #endif
1618 #ifdef INET6
1619                         /* A V6 address and the endpoint is NOT bound V6 */
1620                         if (nam->sa_family == AF_INET6 &&
1621                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1622                                 SCTP_INP_RUNLOCK(inp);
1623                                 continue;
1624                         }
1625 #endif
1626                         /* does a VRF id match? */
1627                         fnd = 0;
1628                         if (inp->def_vrf_id == vrf_id)
1629                                 fnd = 1;
1630
1631                         SCTP_INP_RUNLOCK(inp);
1632                         if (!fnd)
1633                                 continue;
1634                         return (inp);
1635                 }
1636                 SCTP_INP_RUNLOCK(inp);
1637         }
1638         switch (nam->sa_family) {
1639 #ifdef INET
1640         case AF_INET:
1641                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1642                         /* Can't hunt for one that has no address specified */
1643                         return (NULL);
1644                 }
1645                 break;
1646 #endif
1647 #ifdef INET6
1648         case AF_INET6:
1649                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1650                         /* Can't hunt for one that has no address specified */
1651                         return (NULL);
1652                 }
1653                 break;
1654 #endif
1655         default:
1656                 break;
1657         }
1658         /*
1659          * ok, not bound to all so see if we can find a EP bound to this
1660          * address.
1661          */
1662         LIST_FOREACH(inp, head, sctp_hash) {
1663                 SCTP_INP_RLOCK(inp);
1664                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1665                         SCTP_INP_RUNLOCK(inp);
1666                         continue;
1667                 }
1668                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1669                         SCTP_INP_RUNLOCK(inp);
1670                         continue;
1671                 }
1672                 /*
1673                  * Ok this could be a likely candidate, look at all of its
1674                  * addresses
1675                  */
1676                 if (inp->sctp_lport != lport) {
1677                         SCTP_INP_RUNLOCK(inp);
1678                         continue;
1679                 }
1680                 /* does a VRF id match? */
1681                 fnd = 0;
1682                 if (inp->def_vrf_id == vrf_id)
1683                         fnd = 1;
1684
1685                 if (!fnd) {
1686                         SCTP_INP_RUNLOCK(inp);
1687                         continue;
1688                 }
1689                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1690                         if (laddr->ifa == NULL) {
1691                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1692                                     __FUNCTION__);
1693                                 continue;
1694                         }
1695                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1696                             (void *)laddr->ifa);
1697                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1698                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1699                                 continue;
1700                         }
1701                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1702                                 /* possible, see if it matches */
1703                                 switch (nam->sa_family) {
1704 #ifdef INET
1705                                 case AF_INET:
1706                                         if (sin->sin_addr.s_addr ==
1707                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1708                                                 SCTP_INP_RUNLOCK(inp);
1709                                                 return (inp);
1710                                         }
1711                                         break;
1712 #endif
1713 #ifdef INET6
1714                                 case AF_INET6:
1715                                         intf_addr6 = &laddr->ifa->address.sin6;
1716                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1717                                             intf_addr6)) {
1718                                                 SCTP_INP_RUNLOCK(inp);
1719                                                 return (inp);
1720                                         }
1721                                         break;
1722 #endif
1723                                 }
1724                         }
1725                 }
1726                 SCTP_INP_RUNLOCK(inp);
1727         }
1728         return (NULL);
1729 }
1730
1731
1732 static struct sctp_inpcb *
1733 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1734 {
1735         struct sctppcbhead *head;
1736         struct sctp_inpcb *t_inp;
1737         int fnd;
1738
1739         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1740             SCTP_BASE_INFO(hashmark))];
1741         LIST_FOREACH(t_inp, head, sctp_hash) {
1742                 if (t_inp->sctp_lport != lport) {
1743                         continue;
1744                 }
1745                 /* is it in the VRF in question */
1746                 fnd = 0;
1747                 if (t_inp->def_vrf_id == vrf_id)
1748                         fnd = 1;
1749                 if (!fnd)
1750                         continue;
1751
1752                 /* This one is in use. */
1753                 /* check the v6/v4 binding issue */
1754                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1755                     SCTP_IPV6_V6ONLY(t_inp)) {
1756                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1757                                 /* collision in V6 space */
1758                                 return (t_inp);
1759                         } else {
1760                                 /* inp is BOUND_V4 no conflict */
1761                                 continue;
1762                         }
1763                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1764                         /* t_inp is bound v4 and v6, conflict always */
1765                         return (t_inp);
1766                 } else {
1767                         /* t_inp is bound only V4 */
1768                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1769                             SCTP_IPV6_V6ONLY(inp)) {
1770                                 /* no conflict */
1771                                 continue;
1772                         }
1773                         /* else fall through to conflict */
1774                 }
1775                 return (t_inp);
1776         }
1777         return (NULL);
1778 }
1779
1780
1781 int
1782 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1783 {
1784         /* For 1-2-1 with port reuse */
1785         struct sctppcbhead *head;
1786         struct sctp_inpcb *tinp;
1787
1788         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1789                 /* only works with port reuse on */
1790                 return (-1);
1791         }
1792         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1793                 return (0);
1794         }
1795         SCTP_INP_RUNLOCK(inp);
1796         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1797             SCTP_BASE_INFO(hashmark))];
1798         /* Kick out all non-listeners to the TCP hash */
1799         LIST_FOREACH(tinp, head, sctp_hash) {
1800                 if (tinp->sctp_lport != inp->sctp_lport) {
1801                         continue;
1802                 }
1803                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1804                         continue;
1805                 }
1806                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1807                         continue;
1808                 }
1809                 if (tinp->sctp_socket->so_qlimit) {
1810                         continue;
1811                 }
1812                 SCTP_INP_WLOCK(tinp);
1813                 LIST_REMOVE(tinp, sctp_hash);
1814                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1815                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1816                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1817                 SCTP_INP_WUNLOCK(tinp);
1818         }
1819         SCTP_INP_WLOCK(inp);
1820         /* Pull from where he was */
1821         LIST_REMOVE(inp, sctp_hash);
1822         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1823         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1824         LIST_INSERT_HEAD(head, inp, sctp_hash);
1825         SCTP_INP_WUNLOCK(inp);
1826         SCTP_INP_RLOCK(inp);
1827         return (0);
1828 }
1829
1830
1831 struct sctp_inpcb *
1832 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1833     uint32_t vrf_id)
1834 {
1835         /*
1836          * First we check the hash table to see if someone has this port
1837          * bound with just the port.
1838          */
1839         struct sctp_inpcb *inp;
1840         struct sctppcbhead *head;
1841         int lport;
1842         unsigned int i;
1843
1844 #ifdef INET
1845         struct sockaddr_in *sin;
1846
1847 #endif
1848 #ifdef INET6
1849         struct sockaddr_in6 *sin6;
1850
1851 #endif
1852
1853         switch (nam->sa_family) {
1854 #ifdef INET
1855         case AF_INET:
1856                 sin = (struct sockaddr_in *)nam;
1857                 lport = sin->sin_port;
1858                 break;
1859 #endif
1860 #ifdef INET6
1861         case AF_INET6:
1862                 sin6 = (struct sockaddr_in6 *)nam;
1863                 lport = sin6->sin6_port;
1864                 break;
1865 #endif
1866         default:
1867                 return (NULL);
1868         }
1869         /*
1870          * I could cheat here and just cast to one of the types but we will
1871          * do it right. It also provides the check against an Unsupported
1872          * type too.
1873          */
1874         /* Find the head of the ALLADDR chain */
1875         if (have_lock == 0) {
1876                 SCTP_INP_INFO_RLOCK();
1877         }
1878         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1879             SCTP_BASE_INFO(hashmark))];
1880         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1881
1882         /*
1883          * If the TCP model exists it could be that the main listening
1884          * endpoint is gone but there still exists a connected socket for
1885          * this guy. If so we can return the first one that we find. This
1886          * may NOT be the correct one so the caller should be wary on the
1887          * returned INP. Currently the only caller that sets find_tcp_pool
1888          * is in bindx where we are verifying that a user CAN bind the
1889          * address. He either has bound it already, or someone else has, or
1890          * its open to bind, so this is good enough.
1891          */
1892         if (inp == NULL && find_tcp_pool) {
1893                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1894                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1895                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1896                         if (inp) {
1897                                 break;
1898                         }
1899                 }
1900         }
1901         if (inp) {
1902                 SCTP_INP_INCR_REF(inp);
1903         }
1904         if (have_lock == 0) {
1905                 SCTP_INP_INFO_RUNLOCK();
1906         }
1907         return (inp);
1908 }
1909
1910
1911 /*
1912  * Find an association for an endpoint with the pointer to whom you want to
1913  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1914  * need to change the *to to some other struct like a mbuf...
1915  */
1916 struct sctp_tcb *
1917 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
1918     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1919     uint32_t vrf_id)
1920 {
1921         struct sctp_inpcb *inp = NULL;
1922         struct sctp_tcb *stcb;
1923
1924         SCTP_INP_INFO_RLOCK();
1925         if (find_tcp_pool) {
1926                 if (inp_p != NULL) {
1927                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
1928                             vrf_id);
1929                 } else {
1930                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
1931                             vrf_id);
1932                 }
1933                 if (stcb != NULL) {
1934                         SCTP_INP_INFO_RUNLOCK();
1935                         return (stcb);
1936                 }
1937         }
1938         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1939         if (inp_p != NULL) {
1940                 *inp_p = inp;
1941         }
1942         SCTP_INP_INFO_RUNLOCK();
1943         if (inp == NULL) {
1944                 return (NULL);
1945         }
1946         /*
1947          * ok, we have an endpoint, now lets find the assoc for it (if any)
1948          * we now place the source address or from in the to of the find
1949          * endpoint call. Since in reality this chain is used from the
1950          * inbound packet side.
1951          */
1952         if (inp_p != NULL) {
1953                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1954                     NULL);
1955         } else {
1956                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
1957                     NULL);
1958         }
1959         return (stcb);
1960 }
1961
1962
1963 /*
1964  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1965  * find all addresses that the sender has specified in any address list. Each
1966  * address will be used to lookup the TCB and see if one exits.
1967  */
1968 static struct sctp_tcb *
1969 sctp_findassociation_special_addr(struct mbuf *m, int offset,
1970     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1971     struct sockaddr *dst)
1972 {
1973         struct sctp_paramhdr *phdr, parm_buf;
1974         struct sctp_tcb *stcb;
1975         uint32_t ptype, plen;
1976
1977 #ifdef INET
1978         struct sockaddr_in sin4;
1979
1980 #endif
1981 #ifdef INET6
1982         struct sockaddr_in6 sin6;
1983
1984 #endif
1985
1986 #ifdef INET
1987         memset(&sin4, 0, sizeof(sin4));
1988         sin4.sin_len = sizeof(sin4);
1989         sin4.sin_family = AF_INET;
1990         sin4.sin_port = sh->src_port;
1991 #endif
1992 #ifdef INET6
1993         memset(&sin6, 0, sizeof(sin6));
1994         sin6.sin6_len = sizeof(sin6);
1995         sin6.sin6_family = AF_INET6;
1996         sin6.sin6_port = sh->src_port;
1997 #endif
1998
1999         stcb = NULL;
2000         offset += sizeof(struct sctp_init_chunk);
2001
2002         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
2003         while (phdr != NULL) {
2004                 /* now we must see if we want the parameter */
2005                 ptype = ntohs(phdr->param_type);
2006                 plen = ntohs(phdr->param_length);
2007                 if (plen == 0) {
2008                         break;
2009                 }
2010 #ifdef INET
2011                 if (ptype == SCTP_IPV4_ADDRESS &&
2012                     plen == sizeof(struct sctp_ipv4addr_param)) {
2013                         /* Get the rest of the address */
2014                         struct sctp_ipv4addr_param ip4_parm, *p4;
2015
2016                         phdr = sctp_get_next_param(m, offset,
2017                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2018                         if (phdr == NULL) {
2019                                 return (NULL);
2020                         }
2021                         p4 = (struct sctp_ipv4addr_param *)phdr;
2022                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2023                         /* look it up */
2024                         stcb = sctp_findassociation_ep_addr(inp_p,
2025                             (struct sockaddr *)&sin4, netp, dst, NULL);
2026                         if (stcb != NULL) {
2027                                 return (stcb);
2028                         }
2029                 }
2030 #endif
2031 #ifdef INET6
2032                 if (ptype == SCTP_IPV6_ADDRESS &&
2033                     plen == sizeof(struct sctp_ipv6addr_param)) {
2034                         /* Get the rest of the address */
2035                         struct sctp_ipv6addr_param ip6_parm, *p6;
2036
2037                         phdr = sctp_get_next_param(m, offset,
2038                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
2039                         if (phdr == NULL) {
2040                                 return (NULL);
2041                         }
2042                         p6 = (struct sctp_ipv6addr_param *)phdr;
2043                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2044                         /* look it up */
2045                         stcb = sctp_findassociation_ep_addr(inp_p,
2046                             (struct sockaddr *)&sin6, netp, dst, NULL);
2047                         if (stcb != NULL) {
2048                                 return (stcb);
2049                         }
2050                 }
2051 #endif
2052                 offset += SCTP_SIZE32(plen);
2053                 phdr = sctp_get_next_param(m, offset, &parm_buf,
2054                     sizeof(parm_buf));
2055         }
2056         return (NULL);
2057 }
2058
2059 static struct sctp_tcb *
2060 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2061     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2062     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2063 {
2064         /*
2065          * Use my vtag to hash. If we find it we then verify the source addr
2066          * is in the assoc. If all goes well we save a bit on rec of a
2067          * packet.
2068          */
2069         struct sctpasochead *head;
2070         struct sctp_nets *net;
2071         struct sctp_tcb *stcb;
2072
2073         SCTP_INP_INFO_RLOCK();
2074         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2075             SCTP_BASE_INFO(hashasocmark))];
2076         if (head == NULL) {
2077                 /* invalid vtag */
2078                 SCTP_INP_INFO_RUNLOCK();
2079                 return (NULL);
2080         }
2081         LIST_FOREACH(stcb, head, sctp_asocs) {
2082                 SCTP_INP_RLOCK(stcb->sctp_ep);
2083                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2084                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2085                         continue;
2086                 }
2087                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2088                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2089                         continue;
2090                 }
2091                 SCTP_TCB_LOCK(stcb);
2092                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2093                 if (stcb->asoc.my_vtag == vtag) {
2094                         /* candidate */
2095                         if (stcb->rport != rport) {
2096                                 SCTP_TCB_UNLOCK(stcb);
2097                                 continue;
2098                         }
2099                         if (stcb->sctp_ep->sctp_lport != lport) {
2100                                 SCTP_TCB_UNLOCK(stcb);
2101                                 continue;
2102                         }
2103                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2104                                 SCTP_TCB_UNLOCK(stcb);
2105                                 continue;
2106                         }
2107                         /* RRS:Need toaddr check here */
2108                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2109                                 /* Endpoint does not own this address */
2110                                 SCTP_TCB_UNLOCK(stcb);
2111                                 continue;
2112                         }
2113                         if (remote_tag) {
2114                                 /*
2115                                  * If we have both vtags that's all we match
2116                                  * on
2117                                  */
2118                                 if (stcb->asoc.peer_vtag == remote_tag) {
2119                                         /*
2120                                          * If both tags match we consider it
2121                                          * conclusive and check NO
2122                                          * source/destination addresses
2123                                          */
2124                                         goto conclusive;
2125                                 }
2126                         }
2127                         if (skip_src_check) {
2128                 conclusive:
2129                                 if (from) {
2130                                         *netp = sctp_findnet(stcb, from);
2131                                 } else {
2132                                         *netp = NULL;   /* unknown */
2133                                 }
2134                                 if (inp_p)
2135                                         *inp_p = stcb->sctp_ep;
2136                                 SCTP_INP_INFO_RUNLOCK();
2137                                 return (stcb);
2138                         }
2139                         net = sctp_findnet(stcb, from);
2140                         if (net) {
2141                                 /* yep its him. */
2142                                 *netp = net;
2143                                 SCTP_STAT_INCR(sctps_vtagexpress);
2144                                 *inp_p = stcb->sctp_ep;
2145                                 SCTP_INP_INFO_RUNLOCK();
2146                                 return (stcb);
2147                         } else {
2148                                 /*
2149                                  * not him, this should only happen in rare
2150                                  * cases so I peg it.
2151                                  */
2152                                 SCTP_STAT_INCR(sctps_vtagbogus);
2153                         }
2154                 }
2155                 SCTP_TCB_UNLOCK(stcb);
2156         }
2157         SCTP_INP_INFO_RUNLOCK();
2158         return (NULL);
2159 }
2160
2161
2162 /*
2163  * Find an association with the pointer to the inbound IP packet. This can be
2164  * a IPv4 or IPv6 packet.
2165  */
2166 struct sctp_tcb *
2167 sctp_findassociation_addr(struct mbuf *m, int offset,
2168     struct sockaddr *src, struct sockaddr *dst,
2169     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2170     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2171 {
2172         int find_tcp_pool;
2173         struct sctp_tcb *stcb;
2174         struct sctp_inpcb *inp;
2175
2176         if (sh->v_tag) {
2177                 /* we only go down this path if vtag is non-zero */
2178                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2179                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2180                 if (stcb) {
2181                         return (stcb);
2182                 }
2183         }
2184         find_tcp_pool = 0;
2185         if ((ch->chunk_type != SCTP_INITIATION) &&
2186             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2187             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2188             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2189                 /* Other chunk types go to the tcp pool. */
2190                 find_tcp_pool = 1;
2191         }
2192         if (inp_p) {
2193                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2194                     find_tcp_pool, vrf_id);
2195                 inp = *inp_p;
2196         } else {
2197                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2198                     find_tcp_pool, vrf_id);
2199         }
2200         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2201         if (stcb == NULL && inp) {
2202                 /* Found a EP but not this address */
2203                 if ((ch->chunk_type == SCTP_INITIATION) ||
2204                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2205                         /*-
2206                          * special hook, we do NOT return linp or an
2207                          * association that is linked to an existing
2208                          * association that is under the TCP pool (i.e. no
2209                          * listener exists). The endpoint finding routine
2210                          * will always find a listener before examining the
2211                          * TCP pool.
2212                          */
2213                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2214                                 if (inp_p) {
2215                                         *inp_p = NULL;
2216                                 }
2217                                 return (NULL);
2218                         }
2219                         stcb = sctp_findassociation_special_addr(m,
2220                             offset, sh, &inp, netp, dst);
2221                         if (inp_p != NULL) {
2222                                 *inp_p = inp;
2223                         }
2224                 }
2225         }
2226         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2227         return (stcb);
2228 }
2229
2230 /*
2231  * lookup an association by an ASCONF lookup address.
2232  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2233  */
2234 struct sctp_tcb *
2235 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2236     struct sockaddr *dst, struct sctphdr *sh,
2237     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2238 {
2239         struct sctp_tcb *stcb;
2240         struct sockaddr_storage remote_store;
2241         struct sctp_paramhdr parm_buf, *phdr;
2242         int ptype;
2243         int zero_address = 0;
2244
2245 #ifdef INET
2246         struct sockaddr_in *sin;
2247
2248 #endif
2249 #ifdef INET6
2250         struct sockaddr_in6 *sin6;
2251
2252 #endif
2253
2254         memset(&remote_store, 0, sizeof(remote_store));
2255         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2256             &parm_buf, sizeof(struct sctp_paramhdr));
2257         if (phdr == NULL) {
2258                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2259                     __FUNCTION__);
2260                 return NULL;
2261         }
2262         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2263         /* get the correlation address */
2264         switch (ptype) {
2265 #ifdef INET6
2266         case SCTP_IPV6_ADDRESS:
2267                 {
2268                         /* ipv6 address param */
2269                         struct sctp_ipv6addr_param *p6, p6_buf;
2270
2271                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2272                                 return NULL;
2273                         }
2274                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2275                             offset + sizeof(struct sctp_asconf_chunk),
2276                             &p6_buf.ph, sizeof(*p6));
2277                         if (p6 == NULL) {
2278                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2279                                     __FUNCTION__);
2280                                 return (NULL);
2281                         }
2282                         sin6 = (struct sockaddr_in6 *)&remote_store;
2283                         sin6->sin6_family = AF_INET6;
2284                         sin6->sin6_len = sizeof(*sin6);
2285                         sin6->sin6_port = sh->src_port;
2286                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2287                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2288                                 zero_address = 1;
2289                         break;
2290                 }
2291 #endif
2292 #ifdef INET
2293         case SCTP_IPV4_ADDRESS:
2294                 {
2295                         /* ipv4 address param */
2296                         struct sctp_ipv4addr_param *p4, p4_buf;
2297
2298                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2299                                 return NULL;
2300                         }
2301                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2302                             offset + sizeof(struct sctp_asconf_chunk),
2303                             &p4_buf.ph, sizeof(*p4));
2304                         if (p4 == NULL) {
2305                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2306                                     __FUNCTION__);
2307                                 return (NULL);
2308                         }
2309                         sin = (struct sockaddr_in *)&remote_store;
2310                         sin->sin_family = AF_INET;
2311                         sin->sin_len = sizeof(*sin);
2312                         sin->sin_port = sh->src_port;
2313                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2314                         if (sin->sin_addr.s_addr == INADDR_ANY)
2315                                 zero_address = 1;
2316                         break;
2317                 }
2318 #endif
2319         default:
2320                 /* invalid address param type */
2321                 return NULL;
2322         }
2323
2324         if (zero_address) {
2325                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2326                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2327                 if (stcb != NULL) {
2328                         SCTP_INP_DECR_REF(*inp_p);
2329                 }
2330         } else {
2331                 stcb = sctp_findassociation_ep_addr(inp_p,
2332                     (struct sockaddr *)&remote_store, netp,
2333                     dst, NULL);
2334         }
2335         return (stcb);
2336 }
2337
2338
2339 /*
2340  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2341  * addresses. This way if we don't get a bind we by default pick a ephemeral
2342  * port with all addresses bound.
2343  */
2344 int
2345 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2346 {
2347         /*
2348          * we get called when a new endpoint starts up. We need to allocate
2349          * the sctp_inpcb structure from the zone and init it. Mark it as
2350          * unbound and find a port that we can use as an ephemeral with
2351          * INADDR_ANY. If the user binds later no problem we can then add in
2352          * the specific addresses. And setup the default parameters for the
2353          * EP.
2354          */
2355         int i, error;
2356         struct sctp_inpcb *inp;
2357         struct sctp_pcb *m;
2358         struct timeval time;
2359         sctp_sharedkey_t *null_key;
2360
2361         error = 0;
2362
2363         SCTP_INP_INFO_WLOCK();
2364         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2365         if (inp == NULL) {
2366                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2367                 SCTP_INP_INFO_WUNLOCK();
2368                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2369                 return (ENOBUFS);
2370         }
2371         /* zap it */
2372         bzero(inp, sizeof(*inp));
2373
2374         /* bump generations */
2375         /* setup socket pointers */
2376         inp->sctp_socket = so;
2377         inp->ip_inp.inp.inp_socket = so;
2378 #ifdef INET6
2379         if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2380                 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2381         }
2382 #endif
2383         inp->sctp_associd_counter = 1;
2384         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2385         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2386         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2387         inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable);
2388         /* init the small hash table we use to track asocid <-> tcb */
2389         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2390         if (inp->sctp_asocidhash == NULL) {
2391                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2392                 SCTP_INP_INFO_WUNLOCK();
2393                 return (ENOBUFS);
2394         }
2395 #ifdef IPSEC
2396         {
2397                 struct inpcbpolicy *pcb_sp = NULL;
2398
2399                 error = ipsec_init_policy(so, &pcb_sp);
2400                 /* Arrange to share the policy */
2401                 inp->ip_inp.inp.inp_sp = pcb_sp;
2402                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2403         }
2404         if (error != 0) {
2405                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2406                 SCTP_INP_INFO_WUNLOCK();
2407                 return error;
2408         }
2409 #endif                          /* IPSEC */
2410         SCTP_INCR_EP_COUNT();
2411         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2412         SCTP_INP_INFO_WUNLOCK();
2413
2414         so->so_pcb = (caddr_t)inp;
2415
2416         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2417                 /* UDP style socket */
2418                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2419                     SCTP_PCB_FLAGS_UNBOUND);
2420                 /* Be sure it is NON-BLOCKING IO for UDP */
2421                 /* SCTP_SET_SO_NBIO(so); */
2422         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2423                 /* TCP style socket */
2424                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2425                     SCTP_PCB_FLAGS_UNBOUND);
2426                 /* Be sure we have blocking IO by default */
2427                 SCTP_CLEAR_SO_NBIO(so);
2428         } else {
2429                 /*
2430                  * unsupported socket type (RAW, etc)- in case we missed it
2431                  * in protosw
2432                  */
2433                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2434                 so->so_pcb = NULL;
2435                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2436                 return (EOPNOTSUPP);
2437         }
2438         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2439                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2440                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2441         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2442                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2443                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2444         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2445                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2446                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2447         }
2448         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2449             &inp->sctp_hashmark);
2450         if (inp->sctp_tcbhash == NULL) {
2451                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2452                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2453                 so->so_pcb = NULL;
2454                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2455                 return (ENOBUFS);
2456         }
2457         inp->def_vrf_id = vrf_id;
2458
2459         SCTP_INP_INFO_WLOCK();
2460         SCTP_INP_LOCK_INIT(inp);
2461         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2462         SCTP_INP_READ_INIT(inp);
2463         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2464         /* lock the new ep */
2465         SCTP_INP_WLOCK(inp);
2466
2467         /* add it to the info area */
2468         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2469         SCTP_INP_INFO_WUNLOCK();
2470
2471         TAILQ_INIT(&inp->read_queue);
2472         LIST_INIT(&inp->sctp_addr_list);
2473
2474         LIST_INIT(&inp->sctp_asoc_list);
2475
2476 #ifdef SCTP_TRACK_FREED_ASOCS
2477         /* TEMP CODE */
2478         LIST_INIT(&inp->sctp_asoc_free_list);
2479 #endif
2480         /* Init the timer structure for signature change */
2481         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2482         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2483
2484         /* now init the actual endpoint default data */
2485         m = &inp->sctp_ep;
2486
2487         /* setup the base timeout information */
2488         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2489         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2490         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2491         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2492         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2493         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2494         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2495         /* all max/min max are in ms */
2496         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2497         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2498         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2499         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2500         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2501
2502         m->max_open_streams_intome = MAX_SCTP_STREAMS;
2503
2504         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2505         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2506         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2507         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2508         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2509         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2510         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2511         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2512
2513         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2514         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2515         /* number of streams to pre-open on a association */
2516         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2517
2518         /* Add adaptation cookie */
2519         m->adaptation_layer_indicator = 0;
2520         m->adaptation_layer_indicator_provided = 0;
2521
2522         /* seed random number generator */
2523         m->random_counter = 1;
2524         m->store_at = SCTP_SIGNATURE_SIZE;
2525         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2526         sctp_fill_random_store(m);
2527
2528         /* Minimum cookie size */
2529         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2530             sizeof(struct sctp_state_cookie);
2531         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2532
2533         /* Setup the initial secret */
2534         (void)SCTP_GETTIME_TIMEVAL(&time);
2535         m->time_of_secret_change = time.tv_sec;
2536
2537         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2538                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2539         }
2540         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2541
2542         /* How long is a cookie good for ? */
2543         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2544         /*
2545          * Initialize authentication parameters
2546          */
2547         m->local_hmacs = sctp_default_supported_hmaclist();
2548         m->local_auth_chunks = sctp_alloc_chunklist();
2549         m->default_dscp = 0;
2550 #ifdef INET6
2551         m->default_flowlabel = 0;
2552 #endif
2553         m->port = 0;            /* encapsulation disabled by default */
2554         sctp_auth_set_default_chunks(m->local_auth_chunks);
2555         LIST_INIT(&m->shared_keys);
2556         /* add default NULL key as key id 0 */
2557         null_key = sctp_alloc_sharedkey();
2558         sctp_insert_sharedkey(&m->shared_keys, null_key);
2559         SCTP_INP_WUNLOCK(inp);
2560 #ifdef SCTP_LOG_CLOSING
2561         sctp_log_closing(inp, NULL, 12);
2562 #endif
2563         return (error);
2564 }
2565
2566
2567 void
2568 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2569     struct sctp_tcb *stcb)
2570 {
2571         struct sctp_nets *net;
2572         uint16_t lport, rport;
2573         struct sctppcbhead *head;
2574         struct sctp_laddr *laddr, *oladdr;
2575
2576         atomic_add_int(&stcb->asoc.refcnt, 1);
2577         SCTP_TCB_UNLOCK(stcb);
2578         SCTP_INP_INFO_WLOCK();
2579         SCTP_INP_WLOCK(old_inp);
2580         SCTP_INP_WLOCK(new_inp);
2581         SCTP_TCB_LOCK(stcb);
2582         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2583
2584         new_inp->sctp_ep.time_of_secret_change =
2585             old_inp->sctp_ep.time_of_secret_change;
2586         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2587             sizeof(old_inp->sctp_ep.secret_key));
2588         new_inp->sctp_ep.current_secret_number =
2589             old_inp->sctp_ep.current_secret_number;
2590         new_inp->sctp_ep.last_secret_number =
2591             old_inp->sctp_ep.last_secret_number;
2592         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2593
2594         /* make it so new data pours into the new socket */
2595         stcb->sctp_socket = new_inp->sctp_socket;
2596         stcb->sctp_ep = new_inp;
2597
2598         /* Copy the port across */
2599         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2600         rport = stcb->rport;
2601         /* Pull the tcb from the old association */
2602         LIST_REMOVE(stcb, sctp_tcbhash);
2603         LIST_REMOVE(stcb, sctp_tcblist);
2604         if (stcb->asoc.in_asocid_hash) {
2605                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2606         }
2607         /* Now insert the new_inp into the TCP connected hash */
2608         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2609
2610         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2611         /* Its safe to access */
2612         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2613
2614         /* Now move the tcb into the endpoint list */
2615         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2616         /*
2617          * Question, do we even need to worry about the ep-hash since we
2618          * only have one connection? Probably not :> so lets get rid of it
2619          * and not suck up any kernel memory in that.
2620          */
2621         if (stcb->asoc.in_asocid_hash) {
2622                 struct sctpasochead *lhd;
2623
2624                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2625                     new_inp->hashasocidmark)];
2626                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2627         }
2628         /* Ok. Let's restart timer. */
2629         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2630                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2631                     stcb, net);
2632         }
2633
2634         SCTP_INP_INFO_WUNLOCK();
2635         if (new_inp->sctp_tcbhash != NULL) {
2636                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2637                 new_inp->sctp_tcbhash = NULL;
2638         }
2639         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2640                 /* Subset bound, so copy in the laddr list from the old_inp */
2641                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2642                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2643                         if (laddr == NULL) {
2644                                 /*
2645                                  * Gak, what can we do? This assoc is really
2646                                  * HOSED. We probably should send an abort
2647                                  * here.
2648                                  */
2649                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2650                                 continue;
2651                         }
2652                         SCTP_INCR_LADDR_COUNT();
2653                         bzero(laddr, sizeof(*laddr));
2654                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2655                         laddr->ifa = oladdr->ifa;
2656                         atomic_add_int(&laddr->ifa->refcount, 1);
2657                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2658                             sctp_nxt_addr);
2659                         new_inp->laddr_count++;
2660                         if (oladdr == stcb->asoc.last_used_address) {
2661                                 stcb->asoc.last_used_address = laddr;
2662                         }
2663                 }
2664         }
2665         /*
2666          * Now any running timers need to be adjusted since we really don't
2667          * care if they are running or not just blast in the new_inp into
2668          * all of them.
2669          */
2670
2671         stcb->asoc.dack_timer.ep = (void *)new_inp;
2672         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2673         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2674         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2675         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2676         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2677         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2678         /* now what about the nets? */
2679         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2680                 net->pmtu_timer.ep = (void *)new_inp;
2681                 net->hb_timer.ep = (void *)new_inp;
2682                 net->rxt_timer.ep = (void *)new_inp;
2683         }
2684         SCTP_INP_WUNLOCK(new_inp);
2685         SCTP_INP_WUNLOCK(old_inp);
2686 }
2687
2688
2689
2690
2691 /* sctp_ifap is used to bypass normal local address validation checks */
2692 int
2693 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2694     struct sctp_ifa *sctp_ifap, struct thread *p)
2695 {
2696         /* bind a ep to a socket address */
2697         struct sctppcbhead *head;
2698         struct sctp_inpcb *inp, *inp_tmp;
2699         struct inpcb *ip_inp;
2700         int port_reuse_active = 0;
2701         int bindall;
2702         uint16_t lport;
2703         int error;
2704         uint32_t vrf_id;
2705
2706         lport = 0;
2707         error = 0;
2708         bindall = 1;
2709         inp = (struct sctp_inpcb *)so->so_pcb;
2710         ip_inp = (struct inpcb *)so->so_pcb;
2711 #ifdef SCTP_DEBUG
2712         if (addr) {
2713                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2714                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2715                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2716                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2717         }
2718 #endif
2719         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2720                 /* already did a bind, subsequent binds NOT allowed ! */
2721                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2722                 return (EINVAL);
2723         }
2724 #ifdef INVARIANTS
2725         if (p == NULL)
2726                 panic("null proc/thread");
2727 #endif
2728         if (addr != NULL) {
2729                 switch (addr->sa_family) {
2730 #ifdef INET
2731                 case AF_INET:
2732                         {
2733                                 struct sockaddr_in *sin;
2734
2735                                 /* IPV6_V6ONLY socket? */
2736                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2737                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2738                                         return (EINVAL);
2739                                 }
2740                                 if (addr->sa_len != sizeof(*sin)) {
2741                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2742                                         return (EINVAL);
2743                                 }
2744                                 sin = (struct sockaddr_in *)addr;
2745                                 lport = sin->sin_port;
2746                                 /*
2747                                  * For LOOPBACK the prison_local_ip4() call
2748                                  * will transmute the ip address to the
2749                                  * proper value.
2750                                  */
2751                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2752                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2753                                         return (error);
2754                                 }
2755                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2756                                         bindall = 0;
2757                                 }
2758                                 break;
2759                         }
2760 #endif
2761 #ifdef INET6
2762                 case AF_INET6:
2763                         {
2764                                 /*
2765                                  * Only for pure IPv6 Address. (No IPv4
2766                                  * Mapped!)
2767                                  */
2768                                 struct sockaddr_in6 *sin6;
2769
2770                                 sin6 = (struct sockaddr_in6 *)addr;
2771
2772                                 if (addr->sa_len != sizeof(*sin6)) {
2773                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2774                                         return (EINVAL);
2775                                 }
2776                                 lport = sin6->sin6_port;
2777                                 /*
2778                                  * For LOOPBACK the prison_local_ip6() call
2779                                  * will transmute the ipv6 address to the
2780                                  * proper value.
2781                                  */
2782                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2783                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2784                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2785                                         return (error);
2786                                 }
2787                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2788                                         bindall = 0;
2789                                         /* KAME hack: embed scopeid */
2790                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2791                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2792                                                 return (EINVAL);
2793                                         }
2794                                 }
2795                                 /* this must be cleared for ifa_ifwithaddr() */
2796                                 sin6->sin6_scope_id = 0;
2797                                 break;
2798                         }
2799 #endif
2800                 default:
2801                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2802                         return (EAFNOSUPPORT);
2803                 }
2804         }
2805         SCTP_INP_INFO_WLOCK();
2806         SCTP_INP_WLOCK(inp);
2807         /* Setup a vrf_id to be the default for the non-bind-all case. */
2808         vrf_id = inp->def_vrf_id;
2809
2810         /* increase our count due to the unlock we do */
2811         SCTP_INP_INCR_REF(inp);
2812         if (lport) {
2813                 /*
2814                  * Did the caller specify a port? if so we must see if an ep
2815                  * already has this one bound.
2816                  */
2817                 /* got to be root to get at low ports */
2818                 if (ntohs(lport) < IPPORT_RESERVED) {
2819                         if (p && (error =
2820                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2821                             )) {
2822                                 SCTP_INP_DECR_REF(inp);
2823                                 SCTP_INP_WUNLOCK(inp);
2824                                 SCTP_INP_INFO_WUNLOCK();
2825                                 return (error);
2826                         }
2827                 }
2828                 if (p == NULL) {
2829                         SCTP_INP_DECR_REF(inp);
2830                         SCTP_INP_WUNLOCK(inp);
2831                         SCTP_INP_INFO_WUNLOCK();
2832                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2833                         return (error);
2834                 }
2835                 SCTP_INP_WUNLOCK(inp);
2836                 if (bindall) {
2837                         vrf_id = inp->def_vrf_id;
2838                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2839                         if (inp_tmp != NULL) {
2840                                 /*
2841                                  * lock guy returned and lower count note
2842                                  * that we are not bound so inp_tmp should
2843                                  * NEVER be inp. And it is this inp
2844                                  * (inp_tmp) that gets the reference bump,
2845                                  * so we must lower it.
2846                                  */
2847                                 SCTP_INP_DECR_REF(inp_tmp);
2848                                 /* unlock info */
2849                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2850                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2851                                         /*
2852                                          * Ok, must be one-2-one and
2853                                          * allowing port re-use
2854                                          */
2855                                         port_reuse_active = 1;
2856                                         goto continue_anyway;
2857                                 }
2858                                 SCTP_INP_DECR_REF(inp);
2859                                 SCTP_INP_INFO_WUNLOCK();
2860                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2861                                 return (EADDRINUSE);
2862                         }
2863                 } else {
2864                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2865                         if (inp_tmp != NULL) {
2866                                 /*
2867                                  * lock guy returned and lower count note
2868                                  * that we are not bound so inp_tmp should
2869                                  * NEVER be inp. And it is this inp
2870                                  * (inp_tmp) that gets the reference bump,
2871                                  * so we must lower it.
2872                                  */
2873                                 SCTP_INP_DECR_REF(inp_tmp);
2874                                 /* unlock info */
2875                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2876                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2877                                         /*
2878                                          * Ok, must be one-2-one and
2879                                          * allowing port re-use
2880                                          */
2881                                         port_reuse_active = 1;
2882                                         goto continue_anyway;
2883                                 }
2884                                 SCTP_INP_DECR_REF(inp);
2885                                 SCTP_INP_INFO_WUNLOCK();
2886                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2887                                 return (EADDRINUSE);
2888                         }
2889                 }
2890 continue_anyway:
2891                 SCTP_INP_WLOCK(inp);
2892                 if (bindall) {
2893                         /* verify that no lport is not used by a singleton */
2894                         if ((port_reuse_active == 0) &&
2895                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
2896                                 /* Sorry someone already has this one bound */
2897                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2898                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2899                                         port_reuse_active = 1;
2900                                 } else {
2901                                         SCTP_INP_DECR_REF(inp);
2902                                         SCTP_INP_WUNLOCK(inp);
2903                                         SCTP_INP_INFO_WUNLOCK();
2904                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2905                                         return (EADDRINUSE);
2906                                 }
2907                         }
2908                 }
2909         } else {
2910                 uint16_t first, last, candidate;
2911                 uint16_t count;
2912                 int done;
2913
2914                 if (ip_inp->inp_flags & INP_HIGHPORT) {
2915                         first = MODULE_GLOBAL(ipport_hifirstauto);
2916                         last = MODULE_GLOBAL(ipport_hilastauto);
2917                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2918                         if (p && (error =
2919                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2920                             )) {
2921                                 SCTP_INP_DECR_REF(inp);
2922                                 SCTP_INP_WUNLOCK(inp);
2923                                 SCTP_INP_INFO_WUNLOCK();
2924                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2925                                 return (error);
2926                         }
2927                         first = MODULE_GLOBAL(ipport_lowfirstauto);
2928                         last = MODULE_GLOBAL(ipport_lowlastauto);
2929                 } else {
2930                         first = MODULE_GLOBAL(ipport_firstauto);
2931                         last = MODULE_GLOBAL(ipport_lastauto);
2932                 }
2933                 if (first > last) {
2934                         uint16_t temp;
2935
2936                         temp = first;
2937                         first = last;
2938                         last = temp;
2939                 }
2940                 count = last - first + 1;       /* number of candidates */
2941                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2942
2943                 done = 0;
2944                 while (!done) {
2945                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
2946                                 done = 1;
2947                         }
2948                         if (!done) {
2949                                 if (--count == 0) {
2950                                         SCTP_INP_DECR_REF(inp);
2951                                         SCTP_INP_WUNLOCK(inp);
2952                                         SCTP_INP_INFO_WUNLOCK();
2953                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2954                                         return (EADDRINUSE);
2955                                 }
2956                                 if (candidate == last)
2957                                         candidate = first;
2958                                 else
2959                                         candidate = candidate + 1;
2960                         }
2961                 }
2962                 lport = htons(candidate);
2963         }
2964         SCTP_INP_DECR_REF(inp);
2965         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2966             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2967                 /*
2968                  * this really should not happen. The guy did a non-blocking
2969                  * bind and then did a close at the same time.
2970                  */
2971                 SCTP_INP_WUNLOCK(inp);
2972                 SCTP_INP_INFO_WUNLOCK();
2973                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2974                 return (EINVAL);
2975         }
2976         /* ok we look clear to give out this port, so lets setup the binding */
2977         if (bindall) {
2978                 /* binding to all addresses, so just set in the proper flags */
2979                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
2980                 /* set the automatic addr changes from kernel flag */
2981                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
2982                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2983                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2984                 } else {
2985                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2986                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2987                 }
2988                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
2989                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2990                 } else {
2991                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2992                 }
2993                 /*
2994                  * set the automatic mobility_base from kernel flag (by
2995                  * micchie)
2996                  */
2997                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
2998                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
2999                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3000                 } else {
3001                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3002                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3003                 }
3004                 /*
3005                  * set the automatic mobility_fasthandoff from kernel flag
3006                  * (by micchie)
3007                  */
3008                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3009                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3010                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3011                 } else {
3012                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3013                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3014                 }
3015         } else {
3016                 /*
3017                  * bind specific, make sure flags is off and add a new
3018                  * address structure to the sctp_addr_list inside the ep
3019                  * structure.
3020                  *
3021                  * We will need to allocate one and insert it at the head. The
3022                  * socketopt call can just insert new addresses in there as
3023                  * well. It will also have to do the embed scope kame hack
3024                  * too (before adding).
3025                  */
3026                 struct sctp_ifa *ifa;
3027                 struct sockaddr_storage store_sa;
3028
3029                 memset(&store_sa, 0, sizeof(store_sa));
3030                 switch (addr->sa_family) {
3031 #ifdef INET
3032                 case AF_INET:
3033                         {
3034                                 struct sockaddr_in *sin;
3035
3036                                 sin = (struct sockaddr_in *)&store_sa;
3037                                 memcpy(sin, addr, sizeof(struct sockaddr_in));
3038                                 sin->sin_port = 0;
3039                                 break;
3040                         }
3041 #endif
3042 #ifdef INET6
3043                 case AF_INET6:
3044                         {
3045                                 struct sockaddr_in6 *sin6;
3046
3047                                 sin6 = (struct sockaddr_in6 *)&store_sa;
3048                                 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3049                                 sin6->sin6_port = 0;
3050                                 break;
3051                         }
3052 #endif
3053                 default:
3054                         break;
3055                 }
3056                 /*
3057                  * first find the interface with the bound address need to
3058                  * zero out the port to find the address! yuck! can't do
3059                  * this earlier since need port for sctp_pcb_findep()
3060                  */
3061                 if (sctp_ifap != NULL) {
3062                         ifa = sctp_ifap;
3063                 } else {
3064                         /*
3065                          * Note for BSD we hit here always other O/S's will
3066                          * pass things in via the sctp_ifap argument
3067                          * (Panda).
3068                          */
3069                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3070                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3071                 }
3072                 if (ifa == NULL) {
3073                         /* Can't find an interface with that address */
3074                         SCTP_INP_WUNLOCK(inp);
3075                         SCTP_INP_INFO_WUNLOCK();
3076                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3077                         return (EADDRNOTAVAIL);
3078                 }
3079 #ifdef INET6
3080                 if (addr->sa_family == AF_INET6) {
3081                         /* GAK, more FIXME IFA lock? */
3082                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3083                                 /* Can't bind a non-existent addr. */
3084                                 SCTP_INP_WUNLOCK(inp);
3085                                 SCTP_INP_INFO_WUNLOCK();
3086                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3087                                 return (EINVAL);
3088                         }
3089                 }
3090 #endif
3091                 /* we're not bound all */
3092                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3093                 /* allow bindx() to send ASCONF's for binding changes */
3094                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3095                 /* clear automatic addr changes from kernel flag */
3096                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3097
3098                 /* add this address to the endpoint list */
3099                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3100                 if (error != 0) {
3101                         SCTP_INP_WUNLOCK(inp);
3102                         SCTP_INP_INFO_WUNLOCK();
3103                         return (error);
3104                 }
3105                 inp->laddr_count++;
3106         }
3107         /* find the bucket */
3108         if (port_reuse_active) {
3109                 /* Put it into tcp 1-2-1 hash */
3110                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3111                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3112         } else {
3113                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3114         }
3115         /* put it in the bucket */
3116         LIST_INSERT_HEAD(head, inp, sctp_hash);
3117         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3118             (void *)head, ntohs(lport), port_reuse_active);
3119         /* set in the port */
3120         inp->sctp_lport = lport;
3121
3122         /* turn off just the unbound flag */
3123         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3124         SCTP_INP_WUNLOCK(inp);
3125         SCTP_INP_INFO_WUNLOCK();
3126         return (0);
3127 }
3128
3129
3130 static void
3131 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3132 {
3133         struct sctp_iterator *it, *nit;
3134
3135         /*
3136          * We enter with the only the ITERATOR_LOCK in place and a write
3137          * lock on the inp_info stuff.
3138          */
3139         it = sctp_it_ctl.cur_it;
3140         if (it && (it->vn != curvnet)) {
3141                 /* Its not looking at our VNET */
3142                 return;
3143         }
3144         if (it && (it->inp == inp)) {
3145                 /*
3146                  * This is tricky and we hold the iterator lock, but when it
3147                  * returns and gets the lock (when we release it) the
3148                  * iterator will try to operate on inp. We need to stop that
3149                  * from happening. But of course the iterator has a
3150                  * reference on the stcb and inp. We can mark it and it will
3151                  * stop.
3152                  *
3153                  * If its a single iterator situation, we set the end iterator
3154                  * flag. Otherwise we set the iterator to go to the next
3155                  * inp.
3156                  *
3157                  */
3158                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3159                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3160                 } else {
3161                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3162                 }
3163         }
3164         /*
3165          * Now go through and remove any single reference to our inp that
3166          * may be still pending on the list
3167          */
3168         SCTP_IPI_ITERATOR_WQ_LOCK();
3169         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3170                 if (it->vn != curvnet) {
3171                         continue;
3172                 }
3173                 if (it->inp == inp) {
3174                         /* This one points to me is it inp specific? */
3175                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3176                                 /* Remove and free this one */
3177                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3178                                     it, sctp_nxt_itr);
3179                                 if (it->function_atend != NULL) {
3180                                         (*it->function_atend) (it->pointer, it->val);
3181                                 }
3182                                 SCTP_FREE(it, SCTP_M_ITER);
3183                         } else {
3184                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3185                                 if (it->inp) {
3186                                         SCTP_INP_INCR_REF(it->inp);
3187                                 }
3188                         }
3189                         /*
3190                          * When its put in the refcnt is incremented so decr
3191                          * it
3192                          */
3193                         SCTP_INP_DECR_REF(inp);
3194                 }
3195         }
3196         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3197 }
3198
3199 /* release sctp_inpcb unbind the port */
3200 void
3201 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3202 {
3203         /*
3204          * Here we free a endpoint. We must find it (if it is in the Hash
3205          * table) and remove it from there. Then we must also find it in the
3206          * overall list and remove it from there. After all removals are
3207          * complete then any timer has to be stopped. Then start the actual
3208          * freeing. a) Any local lists. b) Any associations. c) The hash of
3209          * all associations. d) finally the ep itself.
3210          */
3211         struct sctp_tcb *asoc, *nasoc;
3212         struct sctp_laddr *laddr, *nladdr;
3213         struct inpcb *ip_pcb;
3214         struct socket *so;
3215         int being_refed = 0;
3216         struct sctp_queued_to_read *sq, *nsq;
3217         int cnt;
3218         sctp_sharedkey_t *shared_key, *nshared_key;
3219
3220
3221 #ifdef SCTP_LOG_CLOSING
3222         sctp_log_closing(inp, NULL, 0);
3223 #endif
3224         SCTP_ITERATOR_LOCK();
3225         /* mark any iterators on the list or being processed */
3226         sctp_iterator_inp_being_freed(inp);
3227         SCTP_ITERATOR_UNLOCK();
3228         so = inp->sctp_socket;
3229         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3230                 /* been here before.. eeks.. get out of here */
3231                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3232 #ifdef SCTP_LOG_CLOSING
3233                 sctp_log_closing(inp, NULL, 1);
3234 #endif
3235                 return;
3236         }
3237         SCTP_ASOC_CREATE_LOCK(inp);
3238         SCTP_INP_INFO_WLOCK();
3239
3240         SCTP_INP_WLOCK(inp);
3241         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3242                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3243                 /* socket is gone, so no more wakeups allowed */
3244                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3245                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3246                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3247
3248         }
3249         /* First time through we have the socket lock, after that no more. */
3250         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3251             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3252
3253         if (inp->control) {
3254                 sctp_m_freem(inp->control);
3255                 inp->control = NULL;
3256         }
3257         if (inp->pkt) {
3258                 sctp_m_freem(inp->pkt);
3259                 inp->pkt = NULL;
3260         }
3261         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3262                                          * here but I will be nice :> (i.e.
3263                                          * ip_pcb = ep;) */
3264         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3265                 int cnt_in_sd;
3266
3267                 cnt_in_sd = 0;
3268                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3269                         SCTP_TCB_LOCK(asoc);
3270                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3271                                 /* Skip guys being freed */
3272                                 cnt_in_sd++;
3273                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3274                                         /*
3275                                          * Special case - we did not start a
3276                                          * kill timer on the asoc due to it
3277                                          * was not closed. So go ahead and
3278                                          * start it now.
3279                                          */
3280                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3281                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3282                                 }
3283                                 SCTP_TCB_UNLOCK(asoc);
3284                                 continue;
3285                         }
3286                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3287                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3288                             (asoc->asoc.total_output_queue_size == 0)) {
3289                                 /*
3290                                  * If we have data in queue, we don't want
3291                                  * to just free since the app may have done,
3292                                  * send()/close or connect/send/close. And
3293                                  * it wants the data to get across first.
3294                                  */
3295                                 /* Just abandon things in the front states */
3296                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3297                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3298                                         cnt_in_sd++;
3299                                 }
3300                                 continue;
3301                         }
3302                         /* Disconnect the socket please */
3303                         asoc->sctp_socket = NULL;
3304                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3305                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3306                             (asoc->asoc.control_pdapi) ||
3307                             (asoc->asoc.size_on_all_streams > 0) ||
3308                             (so && (so->so_rcv.sb_cc > 0))) {
3309                                 /* Left with Data unread */
3310                                 struct mbuf *op_err;
3311
3312                                 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
3313                                     0, M_DONTWAIT, 1, MT_DATA);
3314                                 if (op_err) {
3315                                         /* Fill in the user initiated abort */
3316                                         struct sctp_paramhdr *ph;
3317
3318                                         SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr);
3319                                         ph = mtod(op_err, struct sctp_paramhdr *);
3320                                         ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
3321                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
3322                                 }
3323                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3324                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3325                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3326                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3327                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3328                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3329                                 }
3330                                 if (sctp_free_assoc(inp, asoc,
3331                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3332                                         cnt_in_sd++;
3333                                 }
3334                                 continue;
3335                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3336                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3337                             (asoc->asoc.stream_queue_cnt == 0)) {
3338                                 if (asoc->asoc.locked_on_sending) {
3339                                         goto abort_anyway;
3340                                 }
3341                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3342                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3343                                         struct sctp_nets *netp;
3344
3345                                         /*
3346                                          * there is nothing queued to send,
3347                                          * so I send shutdown
3348                                          */
3349                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3350                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3351                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3352                                         }
3353                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3354                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3355                                         sctp_stop_timers_for_shutdown(asoc);
3356                                         if (asoc->asoc.alternate) {
3357                                                 netp = asoc->asoc.alternate;
3358                                         } else {
3359                                                 netp = asoc->asoc.primary_destination;
3360                                         }
3361                                         sctp_send_shutdown(asoc, netp);
3362                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3363                                             netp);
3364                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3365                                             asoc->asoc.primary_destination);
3366                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3367                                 }
3368                         } else {
3369                                 /* mark into shutdown pending */
3370                                 struct sctp_stream_queue_pending *sp;
3371
3372                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3373                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3374                                     asoc->asoc.primary_destination);
3375                                 if (asoc->asoc.locked_on_sending) {
3376                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3377                                             sctp_streamhead);
3378                                         if (sp == NULL) {
3379                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3380                                                     (void *)asoc->asoc.locked_on_sending,
3381                                                     asoc->asoc.locked_on_sending->stream_no);
3382                                         } else {
3383                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3384                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3385                                         }
3386                                 }
3387                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3388                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3389                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3390                                         struct mbuf *op_err;
3391
3392                         abort_anyway:
3393                                         op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
3394                                             0, M_DONTWAIT, 1, MT_DATA);
3395                                         if (op_err) {
3396                                                 /*
3397                                                  * Fill in the user
3398                                                  * initiated abort
3399                                                  */
3400                                                 struct sctp_paramhdr *ph;
3401
3402                                                 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr);
3403                                                 ph = mtod(op_err, struct sctp_paramhdr *);
3404                                                 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
3405                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3406                                         }
3407                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3408                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3409                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3410                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3411                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3412                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3413                                         }
3414                                         if (sctp_free_assoc(inp, asoc,
3415                                             SCTP_PCBFREE_NOFORCE,
3416                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3417                                                 cnt_in_sd++;
3418                                         }
3419                                         continue;
3420                                 } else {
3421                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3422                                 }
3423                         }
3424                         cnt_in_sd++;
3425                         SCTP_TCB_UNLOCK(asoc);
3426                 }
3427                 /* now is there some left in our SHUTDOWN state? */
3428                 if (cnt_in_sd) {
3429 #ifdef SCTP_LOG_CLOSING
3430                         sctp_log_closing(inp, NULL, 2);
3431 #endif
3432                         inp->sctp_socket = NULL;
3433                         SCTP_INP_WUNLOCK(inp);
3434                         SCTP_ASOC_CREATE_UNLOCK(inp);
3435                         SCTP_INP_INFO_WUNLOCK();
3436                         return;
3437                 }
3438         }
3439         inp->sctp_socket = NULL;
3440         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3441             SCTP_PCB_FLAGS_UNBOUND) {
3442                 /*
3443                  * ok, this guy has been bound. It's port is somewhere in
3444                  * the SCTP_BASE_INFO(hash table). Remove it!
3445                  */
3446                 LIST_REMOVE(inp, sctp_hash);
3447                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3448         }
3449         /*
3450          * If there is a timer running to kill us, forget it, since it may
3451          * have a contest on the INP lock.. which would cause us to die ...
3452          */
3453         cnt = 0;
3454         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3455                 SCTP_TCB_LOCK(asoc);
3456                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3457                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3458                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3459                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3460                         }
3461                         cnt++;
3462                         SCTP_TCB_UNLOCK(asoc);
3463                         continue;
3464                 }
3465                 /* Free associations that are NOT killing us */
3466                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3467                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3468                         struct mbuf *op_err;
3469
3470                         op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
3471                             0, M_DONTWAIT, 1, MT_DATA);
3472                         if (op_err) {
3473                                 /* Fill in the user initiated abort */
3474                                 struct sctp_paramhdr *ph;
3475
3476                                 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr);
3477                                 ph = mtod(op_err, struct sctp_paramhdr *);
3478                                 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
3479                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3480                         }
3481                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3482                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3483                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3484                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3485                         cnt++;
3486                         SCTP_TCB_UNLOCK(asoc);
3487                         continue;
3488                 }
3489                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3490                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3491                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3492                 }
3493                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3494                         cnt++;
3495                 }
3496         }
3497         if (cnt) {
3498                 /* Ok we have someone out there that will kill us */
3499                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3500 #ifdef SCTP_LOG_CLOSING
3501                 sctp_log_closing(inp, NULL, 3);
3502 #endif
3503                 SCTP_INP_WUNLOCK(inp);
3504                 SCTP_ASOC_CREATE_UNLOCK(inp);
3505                 SCTP_INP_INFO_WUNLOCK();
3506                 return;
3507         }
3508         if (SCTP_INP_LOCK_CONTENDED(inp))
3509                 being_refed++;
3510         if (SCTP_INP_READ_CONTENDED(inp))
3511                 being_refed++;
3512         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3513                 being_refed++;
3514
3515         if ((inp->refcount) ||
3516             (being_refed) ||
3517             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3518                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3519 #ifdef SCTP_LOG_CLOSING
3520                 sctp_log_closing(inp, NULL, 4);
3521 #endif
3522                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3523                 SCTP_INP_WUNLOCK(inp);
3524                 SCTP_ASOC_CREATE_UNLOCK(inp);
3525                 SCTP_INP_INFO_WUNLOCK();
3526                 return;
3527         }
3528         inp->sctp_ep.signature_change.type = 0;
3529         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3530         /*
3531          * Remove it from the list .. last thing we need a lock for.
3532          */
3533         LIST_REMOVE(inp, sctp_list);
3534         SCTP_INP_WUNLOCK(inp);
3535         SCTP_ASOC_CREATE_UNLOCK(inp);
3536         SCTP_INP_INFO_WUNLOCK();
3537         /*
3538          * Now we release all locks. Since this INP cannot be found anymore
3539          * except possibly by the kill timer that might be running. We call
3540          * the drain function here. It should hit the case were it sees the
3541          * ACTIVE flag cleared and exit out freeing us to proceed and
3542          * destroy everything.
3543          */
3544         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3545                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3546         } else {
3547                 /* Probably un-needed */
3548                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3549         }
3550
3551 #ifdef SCTP_LOG_CLOSING
3552         sctp_log_closing(inp, NULL, 5);
3553 #endif
3554
3555
3556         if ((inp->sctp_asocidhash) != NULL) {
3557                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3558                 inp->sctp_asocidhash = NULL;
3559         }
3560         /* sa_ignore FREED_MEMORY */
3561         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3562                 /* Its only abandoned if it had data left */
3563                 if (sq->length)
3564                         SCTP_STAT_INCR(sctps_left_abandon);
3565
3566                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3567                 sctp_free_remote_addr(sq->whoFrom);
3568                 if (so)
3569                         so->so_rcv.sb_cc -= sq->length;
3570                 if (sq->data) {
3571                         sctp_m_freem(sq->data);
3572                         sq->data = NULL;
3573                 }
3574                 /*
3575                  * no need to free the net count, since at this point all
3576                  * assoc's are gone.
3577                  */
3578                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3579                 SCTP_DECR_READQ_COUNT();
3580         }
3581         /* Now the sctp_pcb things */
3582         /*
3583          * free each asoc if it is not already closed/free. we can't use the
3584          * macro here since le_next will get freed as part of the
3585          * sctp_free_assoc() call.
3586          */
3587         if (so) {
3588 #ifdef IPSEC
3589                 ipsec_delete_pcbpolicy(ip_pcb);
3590 #endif                          /* IPSEC */
3591
3592                 /* Unlocks not needed since the socket is gone now */
3593         }
3594         if (ip_pcb->inp_options) {
3595                 (void)sctp_m_free(ip_pcb->inp_options);
3596                 ip_pcb->inp_options = 0;
3597         }
3598 #ifdef INET6
3599         if (ip_pcb->inp_vflag & INP_IPV6) {
3600                 struct in6pcb *in6p;
3601
3602                 in6p = (struct in6pcb *)inp;
3603                 ip6_freepcbopts(in6p->in6p_outputopts);
3604         }
3605 #endif                          /* INET6 */
3606         ip_pcb->inp_vflag = 0;
3607         /* free up authentication fields */
3608         if (inp->sctp_ep.local_auth_chunks != NULL)
3609                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3610         if (inp->sctp_ep.local_hmacs != NULL)
3611                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3612
3613         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3614                 LIST_REMOVE(shared_key, next);
3615                 sctp_free_sharedkey(shared_key);
3616                 /* sa_ignore FREED_MEMORY */
3617         }
3618
3619         /*
3620          * if we have an address list the following will free the list of
3621          * ifaddr's that are set into this ep. Again macro limitations here,
3622          * since the LIST_FOREACH could be a bad idea.
3623          */
3624         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3625                 sctp_remove_laddr(laddr);
3626         }
3627
3628 #ifdef SCTP_TRACK_FREED_ASOCS
3629         /* TEMP CODE */
3630         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3631                 LIST_REMOVE(asoc, sctp_tcblist);
3632                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3633                 SCTP_DECR_ASOC_COUNT();
3634         }
3635         /* *** END TEMP CODE *** */
3636 #endif
3637         /* Now lets see about freeing the EP hash table. */
3638         if (inp->sctp_tcbhash != NULL) {
3639                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3640                 inp->sctp_tcbhash = NULL;
3641         }
3642         /* Now we must put the ep memory back into the zone pool */
3643         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3644         SCTP_INP_LOCK_DESTROY(inp);
3645         SCTP_INP_READ_DESTROY(inp);
3646         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3647         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3648         SCTP_DECR_EP_COUNT();
3649 }
3650
3651
3652 struct sctp_nets *
3653 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3654 {
3655         struct sctp_nets *net;
3656
3657         /* locate the address */
3658         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3659                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3660                         return (net);
3661         }
3662         return (NULL);
3663 }
3664
3665
3666 int
3667 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3668 {
3669         struct sctp_ifa *sctp_ifa;
3670
3671         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3672         if (sctp_ifa) {
3673                 return (1);
3674         } else {
3675                 return (0);
3676         }
3677 }
3678
3679 /*
3680  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3681  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3682  * stats of stuff.
3683  */
3684 int
3685 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3686     struct sctp_nets **netp, int set_scope, int from)
3687 {
3688         /*
3689          * The following is redundant to the same lines in the
3690          * sctp_aloc_assoc() but is needed since others call the add address
3691          * function
3692          */
3693         struct sctp_nets *net, *netfirst;
3694         int addr_inscope;
3695
3696         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3697             from);
3698         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3699
3700         netfirst = sctp_findnet(stcb, newaddr);
3701         if (netfirst) {
3702                 /*
3703                  * Lie and return ok, we don't want to make the association
3704                  * go away for this behavior. It will happen in the TCP
3705                  * model in a connected socket. It does not reach the hash
3706                  * table until after the association is built so it can't be
3707                  * found. Mark as reachable, since the initial creation will
3708                  * have been cleared and the NOT_IN_ASSOC flag will have
3709                  * been added... and we don't want to end up removing it
3710                  * back out.
3711                  */
3712                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3713                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3714                             SCTP_ADDR_UNCONFIRMED);
3715                 } else {
3716                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3717                 }
3718
3719                 return (0);
3720         }
3721         addr_inscope = 1;
3722         switch (newaddr->sa_family) {
3723 #ifdef INET
3724         case AF_INET:
3725                 {
3726                         struct sockaddr_in *sin;
3727
3728                         sin = (struct sockaddr_in *)newaddr;
3729                         if (sin->sin_addr.s_addr == 0) {
3730                                 /* Invalid address */
3731                                 return (-1);
3732                         }
3733                         /* zero out the bzero area */
3734                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3735
3736                         /* assure len is set */
3737                         sin->sin_len = sizeof(struct sockaddr_in);
3738                         if (set_scope) {
3739 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3740                                 stcb->ipv4_local_scope = 1;
3741 #else
3742                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3743                                         stcb->asoc.scope.ipv4_local_scope = 1;
3744                                 }
3745 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3746                         } else {
3747                                 /* Validate the address is in scope */
3748                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3749                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3750                                         addr_inscope = 0;
3751                                 }
3752                         }
3753                         break;
3754                 }
3755 #endif
3756 #ifdef INET6
3757         case AF_INET6:
3758                 {
3759                         struct sockaddr_in6 *sin6;
3760
3761                         sin6 = (struct sockaddr_in6 *)newaddr;
3762                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3763                                 /* Invalid address */
3764                                 return (-1);
3765                         }
3766                         /* assure len is set */
3767                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3768                         if (set_scope) {
3769                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3770                                         stcb->asoc.scope.loopback_scope = 1;
3771                                         stcb->asoc.scope.local_scope = 0;
3772                                         stcb->asoc.scope.ipv4_local_scope = 1;
3773                                         stcb->asoc.scope.site_scope = 1;
3774                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3775                                         /*
3776                                          * If the new destination is a
3777                                          * LINK_LOCAL we must have common
3778                                          * site scope. Don't set the local
3779                                          * scope since we may not share all
3780                                          * links, only loopback can do this.
3781                                          * Links on the local network would
3782                                          * also be on our private network
3783                                          * for v4 too.
3784                                          */
3785                                         stcb->asoc.scope.ipv4_local_scope = 1;
3786                                         stcb->asoc.scope.site_scope = 1;
3787                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3788                                         /*
3789                                          * If the new destination is
3790                                          * SITE_LOCAL then we must have site
3791                                          * scope in common.
3792                                          */
3793                                         stcb->asoc.scope.site_scope = 1;
3794                                 }
3795                         } else {
3796                                 /* Validate the address is in scope */
3797                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3798                                     (stcb->asoc.scope.loopback_scope == 0)) {
3799                                         addr_inscope = 0;
3800                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3801                                     (stcb->asoc.scope.local_scope == 0)) {
3802                                         addr_inscope = 0;
3803                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3804                                     (stcb->asoc.scope.site_scope == 0)) {
3805                                         addr_inscope = 0;
3806                                 }
3807                         }
3808                         break;
3809                 }
3810 #endif
3811         default:
3812                 /* not supported family type */
3813                 return (-1);
3814         }
3815         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3816         if (net == NULL) {
3817                 return (-1);
3818         }
3819         SCTP_INCR_RADDR_COUNT();
3820         bzero(net, sizeof(struct sctp_nets));
3821         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3822         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3823         switch (newaddr->sa_family) {
3824 #ifdef INET
3825         case AF_INET:
3826                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3827                 break;
3828 #endif
3829 #ifdef INET6
3830         case AF_INET6:
3831                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3832                 break;
3833 #endif
3834         default:
3835                 break;
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.scope.loopback_scope = 1;
3840                 stcb->asoc.scope.ipv4_local_scope = 1;
3841                 stcb->asoc.scope.local_scope = 0;
3842                 stcb->asoc.scope.site_scope = 1;
3843                 addr_inscope = 1;
3844         }
3845         net->failure_threshold = stcb->asoc.def_net_failure;
3846         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3847         if (addr_inscope == 0) {
3848                 net->dest_state = (SCTP_ADDR_REACHABLE |
3849                     SCTP_ADDR_OUT_OF_SCOPE);
3850         } else {
3851                 if (from == SCTP_ADDR_IS_CONFIRMED)
3852                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3853                         net->dest_state = SCTP_ADDR_REACHABLE;
3854                 else
3855                         net->dest_state = SCTP_ADDR_REACHABLE |
3856                             SCTP_ADDR_UNCONFIRMED;
3857         }
3858         /*
3859          * We set this to 0, the timer code knows that this means its an
3860          * initial value
3861          */
3862         net->rto_needed = 1;
3863         net->RTO = 0;
3864         net->RTO_measured = 0;
3865         stcb->asoc.numnets++;
3866         net->ref_count = 1;
3867         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3868         net->port = stcb->asoc.port;
3869         net->dscp = stcb->asoc.default_dscp;
3870 #ifdef INET6
3871         net->flowlabel = stcb->asoc.default_flowlabel;
3872 #endif
3873         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3874                 net->dest_state |= SCTP_ADDR_NOHB;
3875         } else {
3876                 net->dest_state &= ~SCTP_ADDR_NOHB;
3877         }
3878         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3879                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3880         } else {
3881                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3882         }
3883         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3884         /* Init the timer structure */
3885         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3886         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3887         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3888
3889         /* Now generate a route for this guy */
3890 #ifdef INET6
3891         /* KAME hack: embed scopeid */
3892         if (newaddr->sa_family == AF_INET6) {
3893                 struct sockaddr_in6 *sin6;
3894
3895                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3896                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3897                 sin6->sin6_scope_id = 0;
3898         }
3899 #endif
3900         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3901
3902         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3903                 /* Get source address */
3904                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3905                     stcb,
3906                     (sctp_route_t *) & net->ro,
3907                     net,
3908                     0,
3909                     stcb->asoc.vrf_id);
3910                 /* Now get the interface MTU */
3911                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3912                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3913                 }
3914                 if (net->mtu > 0) {
3915                         uint32_t rmtu;
3916
3917                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3918                         if (rmtu == 0) {
3919                                 /*
3920                                  * Start things off to match mtu of
3921                                  * interface please.
3922                                  */
3923                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3924                                     net->ro.ro_rt, net->mtu);
3925                         } else {
3926                                 /*
3927                                  * we take the route mtu over the interface,
3928                                  * since the route may be leading out the
3929                                  * loopback, or a different interface.
3930                                  */
3931                                 net->mtu = rmtu;
3932                         }
3933                 }
3934         }
3935         if (net->mtu == 0) {
3936                 switch (newaddr->sa_family) {
3937 #ifdef INET
3938                 case AF_INET:
3939                         net->mtu = SCTP_DEFAULT_MTU;
3940                         break;
3941 #endif
3942 #ifdef INET6
3943                 case AF_INET6:
3944                         net->mtu = 1280;
3945                         break;
3946 #endif
3947                 default:
3948                         break;
3949                 }
3950         }
3951         if (net->port) {
3952                 net->mtu -= (uint32_t) sizeof(struct udphdr);
3953         }
3954         if (from == SCTP_ALLOC_ASOC) {
3955                 stcb->asoc.smallest_mtu = net->mtu;
3956         }
3957         if (stcb->asoc.smallest_mtu > net->mtu) {
3958                 stcb->asoc.smallest_mtu = net->mtu;
3959         }
3960 #ifdef INET6
3961         if (newaddr->sa_family == AF_INET6) {
3962                 struct sockaddr_in6 *sin6;
3963
3964                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3965                 (void)sa6_recoverscope(sin6);
3966         }
3967 #endif
3968
3969         /* JRS - Use the congestion control given in the CC module */
3970         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
3971                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
3972
3973         /*
3974          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3975          * of assoc (2005/06/27, iyengar@cis.udel.edu)
3976          */
3977         net->find_pseudo_cumack = 1;
3978         net->find_rtx_pseudo_cumack = 1;
3979         net->src_addr_selected = 0;
3980         /* Choose an initial flowid. */
3981         net->flowid = stcb->asoc.my_vtag ^
3982             ntohs(stcb->rport) ^
3983             ntohs(stcb->sctp_ep->sctp_lport);
3984 #ifdef INVARIANTS
3985         net->flowidset = 1;
3986 #endif
3987         if (netp) {
3988                 *netp = net;
3989         }
3990         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3991         if (net->ro.ro_rt == NULL) {
3992                 /* Since we have no route put it at the back */
3993                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3994         } else if (netfirst == NULL) {
3995                 /* We are the first one in the pool. */
3996                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3997         } else if (netfirst->ro.ro_rt == NULL) {
3998                 /*
3999                  * First one has NO route. Place this one ahead of the first
4000                  * one.
4001                  */
4002                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4003         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4004                 /*
4005                  * This one has a different interface than the one at the
4006                  * top of the list. Place it ahead.
4007                  */
4008                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4009         } else {
4010                 /*
4011                  * Ok we have the same interface as the first one. Move
4012                  * forward until we find either a) one with a NULL route...
4013                  * insert ahead of that b) one with a different ifp.. insert
4014                  * after that. c) end of the list.. insert at the tail.
4015                  */
4016                 struct sctp_nets *netlook;
4017
4018                 do {
4019                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4020                         if (netlook == NULL) {
4021                                 /* End of the list */
4022                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4023                                 break;
4024                         } else if (netlook->ro.ro_rt == NULL) {
4025                                 /* next one has NO route */
4026                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4027                                 break;
4028                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4029                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4030                                     net, sctp_next);
4031                                 break;
4032                         }
4033                         /* Shift forward */
4034                         netfirst = netlook;
4035                 } while (netlook != NULL);
4036         }
4037
4038         /* got to have a primary set */
4039         if (stcb->asoc.primary_destination == 0) {
4040                 stcb->asoc.primary_destination = net;
4041         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4042                     (net->ro.ro_rt) &&
4043             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4044                 /* No route to current primary adopt new primary */
4045                 stcb->asoc.primary_destination = net;
4046         }
4047         /* Validate primary is first */
4048         net = TAILQ_FIRST(&stcb->asoc.nets);
4049         if ((net != stcb->asoc.primary_destination) &&
4050             (stcb->asoc.primary_destination)) {
4051                 /*
4052                  * first one on the list is NOT the primary sctp_cmpaddr()
4053                  * is much more efficient if the primary is the first on the
4054                  * list, make it so.
4055                  */
4056                 TAILQ_REMOVE(&stcb->asoc.nets,
4057                     stcb->asoc.primary_destination, sctp_next);
4058                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4059                     stcb->asoc.primary_destination, sctp_next);
4060         }
4061         return (0);
4062 }
4063
4064
4065 static uint32_t
4066 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4067 {
4068         uint32_t id;
4069         struct sctpasochead *head;
4070         struct sctp_tcb *lstcb;
4071
4072         SCTP_INP_WLOCK(inp);
4073 try_again:
4074         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4075                 /* TSNH */
4076                 SCTP_INP_WUNLOCK(inp);
4077                 return (0);
4078         }
4079         /*
4080          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4081          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4082          */
4083         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4084                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4085         }
4086         id = inp->sctp_associd_counter;
4087         inp->sctp_associd_counter++;
4088         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4089         if (lstcb) {
4090                 goto try_again;
4091         }
4092         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4093         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4094         stcb->asoc.in_asocid_hash = 1;
4095         SCTP_INP_WUNLOCK(inp);
4096         return id;
4097 }
4098
4099 /*
4100  * allocate an association and add it to the endpoint. The caller must be
4101  * careful to add all additional addresses once they are know right away or
4102  * else the assoc will be may experience a blackout scenario.
4103  */
4104 struct sctp_tcb *
4105 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4106     int *error, uint32_t override_tag, uint32_t vrf_id,
4107     struct thread *p
4108 )
4109 {
4110         /* note the p argument is only valid in unbound sockets */
4111
4112         struct sctp_tcb *stcb;
4113         struct sctp_association *asoc;
4114         struct sctpasochead *head;
4115         uint16_t rport;
4116         int err;
4117
4118         /*
4119          * Assumption made here: Caller has done a
4120          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4121          * address does not exist already.
4122          */
4123         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4124                 /* Hit max assoc, sorry no more */
4125                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4126                 *error = ENOBUFS;
4127                 return (NULL);
4128         }
4129         if (firstaddr == NULL) {
4130                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4131                 *error = EINVAL;
4132                 return (NULL);
4133         }
4134         SCTP_INP_RLOCK(inp);
4135         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4136             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4137             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4138                 /*
4139                  * If its in the TCP pool, its NOT allowed to create an
4140                  * association. The parent listener needs to call
4141                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4142                  * off, or connected one does this.. its an error.
4143                  */
4144                 SCTP_INP_RUNLOCK(inp);
4145                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4146                 *error = EINVAL;
4147                 return (NULL);
4148         }
4149         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4150             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4151                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4152                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4153                         SCTP_INP_RUNLOCK(inp);
4154                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4155                         *error = EINVAL;
4156                         return (NULL);
4157                 }
4158         }
4159         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4160 #ifdef SCTP_DEBUG
4161         if (firstaddr) {
4162                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4163                 switch (firstaddr->sa_family) {
4164 #ifdef INET
4165                 case AF_INET:
4166                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4167                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4168                         break;
4169 #endif
4170 #ifdef INET6
4171                 case AF_INET6:
4172                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4173                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4174                         break;
4175 #endif
4176                 default:
4177                         break;
4178                 }
4179         } else {
4180                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4181         }
4182 #endif                          /* SCTP_DEBUG */
4183         switch (firstaddr->sa_family) {
4184 #ifdef INET
4185         case AF_INET:
4186                 {
4187                         struct sockaddr_in *sin;
4188
4189                         sin = (struct sockaddr_in *)firstaddr;
4190                         if ((ntohs(sin->sin_port) == 0) ||
4191                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4192                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4193                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4194                                 /* Invalid address */
4195                                 SCTP_INP_RUNLOCK(inp);
4196                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4197                                 *error = EINVAL;
4198                                 return (NULL);
4199                         }
4200                         rport = sin->sin_port;
4201                         break;
4202                 }
4203 #endif
4204 #ifdef INET6
4205         case AF_INET6:
4206                 {
4207                         struct sockaddr_in6 *sin6;
4208
4209                         sin6 = (struct sockaddr_in6 *)firstaddr;
4210                         if ((ntohs(sin6->sin6_port) == 0) ||
4211                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4212                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4213                                 /* Invalid address */
4214                                 SCTP_INP_RUNLOCK(inp);
4215                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4216                                 *error = EINVAL;
4217                                 return (NULL);
4218                         }
4219                         rport = sin6->sin6_port;
4220                         break;
4221                 }
4222 #endif
4223         default:
4224                 /* not supported family type */
4225                 SCTP_INP_RUNLOCK(inp);
4226                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4227                 *error = EINVAL;
4228                 return (NULL);
4229         }
4230         SCTP_INP_RUNLOCK(inp);
4231         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4232                 /*
4233                  * If you have not performed a bind, then we need to do the
4234                  * ephemeral bind for you.
4235                  */
4236                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4237                     (struct sockaddr *)NULL,
4238                     (struct sctp_ifa *)NULL,
4239                     p
4240                     ))) {
4241                         /* bind error, probably perm */
4242                         *error = err;
4243                         return (NULL);
4244                 }
4245         }
4246         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4247         if (stcb == NULL) {
4248                 /* out of memory? */
4249                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4250                 *error = ENOMEM;
4251                 return (NULL);
4252         }
4253         SCTP_INCR_ASOC_COUNT();
4254
4255         bzero(stcb, sizeof(*stcb));
4256         asoc = &stcb->asoc;
4257
4258         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4259         SCTP_TCB_LOCK_INIT(stcb);
4260         SCTP_TCB_SEND_LOCK_INIT(stcb);
4261         stcb->rport = rport;
4262         /* setup back pointer's */
4263         stcb->sctp_ep = inp;
4264         stcb->sctp_socket = inp->sctp_socket;
4265         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4266                 /* failed */
4267                 SCTP_TCB_LOCK_DESTROY(stcb);
4268                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4269                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4270                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4271                 SCTP_DECR_ASOC_COUNT();
4272                 *error = err;
4273                 return (NULL);
4274         }
4275         /* and the port */
4276         SCTP_INP_INFO_WLOCK();
4277         SCTP_INP_WLOCK(inp);
4278         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4279                 /* inpcb freed while alloc going on */
4280                 SCTP_TCB_LOCK_DESTROY(stcb);
4281                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4282                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4283                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4284                 SCTP_INP_WUNLOCK(inp);
4285                 SCTP_INP_INFO_WUNLOCK();
4286                 SCTP_DECR_ASOC_COUNT();
4287                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4288                 *error = EINVAL;
4289                 return (NULL);
4290         }
4291         SCTP_TCB_LOCK(stcb);
4292
4293         /* now that my_vtag is set, add it to the hash */
4294         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4295         /* put it in the bucket in the vtag hash of assoc's for the system */
4296         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4297         SCTP_INP_INFO_WUNLOCK();
4298
4299         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4300                 /* failure.. memory error? */
4301                 if (asoc->strmout) {
4302                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4303                         asoc->strmout = NULL;
4304                 }
4305                 if (asoc->mapping_array) {
4306                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4307                         asoc->mapping_array = NULL;
4308                 }
4309                 if (asoc->nr_mapping_array) {
4310                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4311                         asoc->nr_mapping_array = NULL;
4312                 }
4313                 SCTP_DECR_ASOC_COUNT();
4314                 SCTP_TCB_LOCK_DESTROY(stcb);
4315                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4316                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4317                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4318                 SCTP_INP_WUNLOCK(inp);
4319                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4320                 *error = ENOBUFS;
4321                 return (NULL);
4322         }
4323         /* Init all the timers */
4324         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4325         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4326         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4327         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4328         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4329         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4330         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4331
4332         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4333         /* now file the port under the hash as well */
4334         if (inp->sctp_tcbhash != NULL) {
4335                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4336                     inp->sctp_hashmark)];
4337                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4338         }
4339         SCTP_INP_WUNLOCK(inp);
4340         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4341         return (stcb);
4342 }
4343
4344
4345 void
4346 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4347 {
4348         struct sctp_association *asoc;
4349
4350         asoc = &stcb->asoc;
4351         asoc->numnets--;
4352         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4353         if (net == asoc->primary_destination) {
4354                 /* Reset primary */
4355                 struct sctp_nets *lnet;
4356
4357                 lnet = TAILQ_FIRST(&asoc->nets);
4358                 /*
4359                  * Mobility adaptation Ideally, if deleted destination is
4360                  * the primary, it becomes a fast retransmission trigger by
4361                  * the subsequent SET PRIMARY. (by micchie)
4362                  */
4363                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4364                     SCTP_MOBILITY_BASE) ||
4365                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4366                     SCTP_MOBILITY_FASTHANDOFF)) {
4367                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4368                         if (asoc->deleted_primary != NULL) {
4369                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4370                                 goto out;
4371                         }
4372                         asoc->deleted_primary = net;
4373                         atomic_add_int(&net->ref_count, 1);
4374                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4375                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4376                         sctp_mobility_feature_on(stcb->sctp_ep,
4377                             SCTP_MOBILITY_PRIM_DELETED);
4378                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4379                             stcb->sctp_ep, stcb, NULL);
4380                 }
4381 out:
4382                 /* Try to find a confirmed primary */
4383                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4384         }
4385         if (net == asoc->last_data_chunk_from) {
4386                 /* Reset primary */
4387                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4388         }
4389         if (net == asoc->last_control_chunk_from) {
4390                 /* Clear net */
4391                 asoc->last_control_chunk_from = NULL;
4392         }
4393         if (net == stcb->asoc.alternate) {
4394                 sctp_free_remote_addr(stcb->asoc.alternate);
4395                 stcb->asoc.alternate = NULL;
4396         }
4397         sctp_free_remote_addr(net);
4398 }
4399
4400 /*
4401  * remove a remote endpoint address from an association, it will fail if the
4402  * address does not exist.
4403  */
4404 int
4405 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4406 {
4407         /*
4408          * Here we need to remove a remote address. This is quite simple, we
4409          * first find it in the list of address for the association
4410          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4411          * on that item. Note we do not allow it to be removed if there are
4412          * no other addresses.
4413          */
4414         struct sctp_association *asoc;
4415         struct sctp_nets *net, *nnet;
4416
4417         asoc = &stcb->asoc;
4418
4419         /* locate the address */
4420         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4421                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4422                         continue;
4423                 }
4424                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4425                     remaddr)) {
4426                         /* we found the guy */
4427                         if (asoc->numnets < 2) {
4428                                 /* Must have at LEAST two remote addresses */
4429                                 return (-1);
4430                         } else {
4431                                 sctp_remove_net(stcb, net);
4432                                 return (0);
4433                         }
4434                 }
4435         }
4436         /* not found. */
4437         return (-2);
4438 }
4439
4440 void
4441 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4442 {
4443         struct sctpvtaghead *chain;
4444         struct sctp_tagblock *twait_block;
4445         int found = 0;
4446         int i;
4447
4448         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4449         if (!LIST_EMPTY(chain)) {
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 == tag) &&
4453                                     (twait_block->vtag_block[i].lport == lport) &&
4454                                     (twait_block->vtag_block[i].rport == rport)) {
4455                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4456                                         twait_block->vtag_block[i].v_tag = 0;
4457                                         twait_block->vtag_block[i].lport = 0;
4458                                         twait_block->vtag_block[i].rport = 0;
4459                                         found = 1;
4460                                         break;
4461                                 }
4462                         }
4463                         if (found)
4464                                 break;
4465                 }
4466         }
4467 }
4468
4469 int
4470 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4471 {
4472         struct sctpvtaghead *chain;
4473         struct sctp_tagblock *twait_block;
4474         int found = 0;
4475         int i;
4476
4477         SCTP_INP_INFO_WLOCK();
4478         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4479         if (!LIST_EMPTY(chain)) {
4480                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4481                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4482                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4483                                     (twait_block->vtag_block[i].lport == lport) &&
4484                                     (twait_block->vtag_block[i].rport == rport)) {
4485                                         found = 1;
4486                                         break;
4487                                 }
4488                         }
4489                         if (found)
4490                                 break;
4491                 }
4492         }
4493         SCTP_INP_INFO_WUNLOCK();
4494         return (found);
4495 }
4496
4497
4498 void
4499 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4500 {
4501         struct sctpvtaghead *chain;
4502         struct sctp_tagblock *twait_block;
4503         struct timeval now;
4504         int set, i;
4505
4506         if (time == 0) {
4507                 /* Its disabled */
4508                 return;
4509         }
4510         (void)SCTP_GETTIME_TIMEVAL(&now);
4511         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4512         set = 0;
4513         if (!LIST_EMPTY(chain)) {
4514                 /* Block(s) present, lets find space, and expire on the fly */
4515                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4516                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4517                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
4518                                     !set) {
4519                                         twait_block->vtag_block[i].tv_sec_at_expire =
4520                                             now.tv_sec + time;
4521                                         twait_block->vtag_block[i].v_tag = tag;
4522                                         twait_block->vtag_block[i].lport = lport;
4523                                         twait_block->vtag_block[i].rport = rport;
4524                                         set = 1;
4525                                 } else if ((twait_block->vtag_block[i].v_tag) &&
4526                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4527                                         /* Audit expires this guy */
4528                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4529                                         twait_block->vtag_block[i].v_tag = 0;
4530                                         twait_block->vtag_block[i].lport = 0;
4531                                         twait_block->vtag_block[i].rport = 0;
4532                                         if (set == 0) {
4533                                                 /* Reuse it for my new tag */
4534                                                 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4535                                                 twait_block->vtag_block[i].v_tag = tag;
4536                                                 twait_block->vtag_block[i].lport = lport;
4537                                                 twait_block->vtag_block[i].rport = rport;
4538                                                 set = 1;
4539                                         }
4540                                 }
4541                         }
4542                         if (set) {
4543                                 /*
4544                                  * We only do up to the block where we can
4545                                  * place our tag for audits
4546                                  */
4547                                 break;
4548                         }
4549                 }
4550         }
4551         /* Need to add a new block to chain */
4552         if (!set) {
4553                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4554                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4555                 if (twait_block == NULL) {
4556 #ifdef INVARIANTS
4557                         panic("Can not alloc tagblock");
4558 #endif
4559                         return;
4560                 }
4561                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4562                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4563                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4564                 twait_block->vtag_block[0].v_tag = tag;
4565                 twait_block->vtag_block[0].lport = lport;
4566                 twait_block->vtag_block[0].rport = rport;
4567         }
4568 }
4569
4570
4571
4572 /*-
4573  * Free the association after un-hashing the remote port. This
4574  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4575  * expect that the input to this function IS a locked TCB.
4576  * It will return 0, if it did NOT destroy the association (instead
4577  * it unlocks it. It will return NON-zero if it either destroyed the
4578  * association OR the association is already destroyed.
4579  */
4580 int
4581 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4582 {
4583         int i;
4584         struct sctp_association *asoc;
4585         struct sctp_nets *net, *nnet;
4586         struct sctp_laddr *laddr, *naddr;
4587         struct sctp_tmit_chunk *chk, *nchk;
4588         struct sctp_asconf_addr *aparam, *naparam;
4589         struct sctp_asconf_ack *aack, *naack;
4590         struct sctp_stream_reset_list *strrst, *nstrrst;
4591         struct sctp_queued_to_read *sq, *nsq;
4592         struct sctp_stream_queue_pending *sp, *nsp;
4593         sctp_sharedkey_t *shared_key, *nshared_key;
4594         struct socket *so;
4595
4596         /* first, lets purge the entry from the hash table. */
4597
4598 #ifdef SCTP_LOG_CLOSING
4599         sctp_log_closing(inp, stcb, 6);
4600 #endif
4601         if (stcb->asoc.state == 0) {
4602 #ifdef SCTP_LOG_CLOSING
4603                 sctp_log_closing(inp, NULL, 7);
4604 #endif
4605                 /* there is no asoc, really TSNH :-0 */
4606                 return (1);
4607         }
4608         if (stcb->asoc.alternate) {
4609                 sctp_free_remote_addr(stcb->asoc.alternate);
4610                 stcb->asoc.alternate = NULL;
4611         }
4612         /* TEMP CODE */
4613         if (stcb->freed_from_where == 0) {
4614                 /* Only record the first place free happened from */
4615                 stcb->freed_from_where = from_location;
4616         }
4617         /* TEMP CODE */
4618
4619         asoc = &stcb->asoc;
4620         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4621             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4622                 /* nothing around */
4623                 so = NULL;
4624         else
4625                 so = inp->sctp_socket;
4626
4627         /*
4628          * We used timer based freeing if a reader or writer is in the way.
4629          * So we first check if we are actually being called from a timer,
4630          * if so we abort early if a reader or writer is still in the way.
4631          */
4632         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4633             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4634                 /*
4635                  * is it the timer driving us? if so are the reader/writers
4636                  * gone?
4637                  */
4638                 if (stcb->asoc.refcnt) {
4639                         /* nope, reader or writer in the way */
4640                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4641                         /* no asoc destroyed */
4642                         SCTP_TCB_UNLOCK(stcb);
4643 #ifdef SCTP_LOG_CLOSING
4644                         sctp_log_closing(inp, stcb, 8);
4645 #endif
4646                         return (0);
4647                 }
4648         }
4649         /* now clean up any other timers */
4650         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4651         asoc->dack_timer.self = NULL;
4652         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4653         /*-
4654          * For stream reset we don't blast this unless
4655          * it is a str-reset timer, it might be the
4656          * free-asoc timer which we DON'T want to
4657          * disturb.
4658          */
4659         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4660                 asoc->strreset_timer.self = NULL;
4661         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4662         asoc->asconf_timer.self = NULL;
4663         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4664         asoc->autoclose_timer.self = NULL;
4665         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4666         asoc->shut_guard_timer.self = NULL;
4667         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4668         asoc->delayed_event_timer.self = NULL;
4669         /* Mobility adaptation */
4670         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4671         asoc->delete_prim_timer.self = NULL;
4672         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4673                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4674                 net->rxt_timer.self = NULL;
4675                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4676                 net->pmtu_timer.self = NULL;
4677                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4678                 net->hb_timer.self = NULL;
4679         }
4680         /* Now the read queue needs to be cleaned up (only once) */
4681         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4682                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4683                 SCTP_INP_READ_LOCK(inp);
4684                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4685                         if (sq->stcb == stcb) {
4686                                 sq->do_not_ref_stcb = 1;
4687                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4688                                 /*
4689                                  * If there is no end, there never will be
4690                                  * now.
4691                                  */
4692                                 if (sq->end_added == 0) {
4693                                         /* Held for PD-API clear that. */
4694                                         sq->pdapi_aborted = 1;
4695                                         sq->held_length = 0;
4696                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4697                                                 /*
4698                                                  * Need to add a PD-API
4699                                                  * aborted indication.
4700                                                  * Setting the control_pdapi
4701                                                  * assures that it will be
4702                                                  * added right after this
4703                                                  * msg.
4704                                                  */
4705                                                 uint32_t strseq;
4706
4707                                                 stcb->asoc.control_pdapi = sq;
4708                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4709                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4710                                                     stcb,
4711                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4712                                                     (void *)&strseq,
4713                                                     SCTP_SO_LOCKED);
4714                                                 stcb->asoc.control_pdapi = NULL;
4715                                         }
4716                                 }
4717                                 /* Add an end to wake them */
4718                                 sq->end_added = 1;
4719                         }
4720                 }
4721                 SCTP_INP_READ_UNLOCK(inp);
4722                 if (stcb->block_entry) {
4723                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4724                         stcb->block_entry->error = ECONNRESET;
4725                         stcb->block_entry = NULL;
4726                 }
4727         }
4728         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4729                 /*
4730                  * Someone holds a reference OR the socket is unaccepted
4731                  * yet.
4732                  */
4733                 if ((stcb->asoc.refcnt) ||
4734                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4735                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4736                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4737                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4738                 }
4739                 SCTP_TCB_UNLOCK(stcb);
4740                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4741                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4742                         /* nothing around */
4743                         so = NULL;
4744                 if (so) {
4745                         /* Wake any reader/writers */
4746                         sctp_sorwakeup(inp, so);
4747                         sctp_sowwakeup(inp, so);
4748                 }
4749 #ifdef SCTP_LOG_CLOSING
4750                 sctp_log_closing(inp, stcb, 9);
4751 #endif
4752                 /* no asoc destroyed */
4753                 return (0);
4754         }
4755 #ifdef SCTP_LOG_CLOSING
4756         sctp_log_closing(inp, stcb, 10);
4757 #endif
4758         /*
4759          * When I reach here, no others want to kill the assoc yet.. and I
4760          * own the lock. Now its possible an abort comes in when I do the
4761          * lock exchange below to grab all the locks to do the final take
4762          * out. to prevent this we increment the count, which will start a
4763          * timer and blow out above thus assuring us that we hold exclusive
4764          * killing of the asoc. Note that after getting back the TCB lock we
4765          * will go ahead and increment the counter back up and stop any
4766          * timer a passing stranger may have started :-S
4767          */
4768         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4769                 atomic_add_int(&stcb->asoc.refcnt, 1);
4770
4771                 SCTP_TCB_UNLOCK(stcb);
4772                 SCTP_INP_INFO_WLOCK();
4773                 SCTP_INP_WLOCK(inp);
4774                 SCTP_TCB_LOCK(stcb);
4775         }
4776         /* Double check the GONE flag */
4777         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4778             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4779                 /* nothing around */
4780                 so = NULL;
4781
4782         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4783             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4784                 /*
4785                  * For TCP type we need special handling when we are
4786                  * connected. We also include the peel'ed off ones to.
4787                  */
4788                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4789                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4790                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4791                         if (so) {
4792                                 SOCK_LOCK(so);
4793                                 if (so->so_rcv.sb_cc == 0) {
4794                                         so->so_state &= ~(SS_ISCONNECTING |
4795                                             SS_ISDISCONNECTING |
4796                                             SS_ISCONFIRMING |
4797                                             SS_ISCONNECTED);
4798                                 }
4799                                 socantrcvmore_locked(so);
4800                                 sctp_sowwakeup(inp, so);
4801                                 sctp_sorwakeup(inp, so);
4802                                 SCTP_SOWAKEUP(so);
4803                         }
4804                 }
4805         }
4806         /*
4807          * Make it invalid too, that way if its about to run it will abort
4808          * and return.
4809          */
4810         /* re-increment the lock */
4811         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4812                 atomic_add_int(&stcb->asoc.refcnt, -1);
4813         }
4814         if (stcb->asoc.refcnt) {
4815                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4816                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4817                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4818                         SCTP_INP_INFO_WUNLOCK();
4819                         SCTP_INP_WUNLOCK(inp);
4820                 }
4821                 SCTP_TCB_UNLOCK(stcb);
4822                 return (0);
4823         }
4824         asoc->state = 0;
4825         if (inp->sctp_tcbhash) {
4826                 LIST_REMOVE(stcb, sctp_tcbhash);
4827         }
4828         if (stcb->asoc.in_asocid_hash) {
4829                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4830         }
4831         /* Now lets remove it from the list of ALL associations in the EP */
4832         LIST_REMOVE(stcb, sctp_tcblist);
4833         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4834                 SCTP_INP_INCR_REF(inp);
4835                 SCTP_INP_WUNLOCK(inp);
4836         }
4837         /* pull from vtag hash */
4838         LIST_REMOVE(stcb, sctp_asocs);
4839         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4840             inp->sctp_lport, stcb->rport);
4841
4842         /*
4843          * Now restop the timers to be sure this is paranoia at is finest!
4844          */
4845         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4846         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4847         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4848         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4849         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4850         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4851         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4852         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4853                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4854                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4855                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4856         }
4857
4858         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4859         /*
4860          * The chunk lists and such SHOULD be empty but we check them just
4861          * in case.
4862          */
4863         /* anything on the wheel needs to be removed */
4864         for (i = 0; i < asoc->streamoutcnt; i++) {
4865                 struct sctp_stream_out *outs;
4866
4867                 outs = &asoc->strmout[i];
4868                 /* now clean up any chunks here */
4869                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4870                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4871                         sctp_free_spbufspace(stcb, asoc, sp);
4872                         if (sp->data) {
4873                                 if (so) {
4874                                         /* Still an open socket - report */
4875                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4876                                             0, (void *)sp, SCTP_SO_LOCKED);
4877                                 }
4878                                 if (sp->data) {
4879                                         sctp_m_freem(sp->data);
4880                                         sp->data = NULL;
4881                                         sp->tail_mbuf = NULL;
4882                                         sp->length = 0;
4883                                 }
4884                         }
4885                         if (sp->net) {
4886                                 sctp_free_remote_addr(sp->net);
4887                                 sp->net = NULL;
4888                         }
4889                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4890                 }
4891         }
4892         /* sa_ignore FREED_MEMORY */
4893         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4894                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4895                 SCTP_FREE(strrst, SCTP_M_STRESET);
4896         }
4897         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4898                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4899                 if (sq->data) {
4900                         sctp_m_freem(sq->data);
4901                         sq->data = NULL;
4902                 }
4903                 sctp_free_remote_addr(sq->whoFrom);
4904                 sq->whoFrom = NULL;
4905                 sq->stcb = NULL;
4906                 /* Free the ctl entry */
4907                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4908                 SCTP_DECR_READQ_COUNT();
4909                 /* sa_ignore FREED_MEMORY */
4910         }
4911         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4912                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4913                 if (chk->data) {
4914                         sctp_m_freem(chk->data);
4915                         chk->data = NULL;
4916                 }
4917                 if (chk->holds_key_ref)
4918                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4919                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4920                 SCTP_DECR_CHK_COUNT();
4921                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4922                 asoc->free_chunk_cnt--;
4923                 /* sa_ignore FREED_MEMORY */
4924         }
4925         /* pending send queue SHOULD be empty */
4926         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4927                 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
4928                         asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
4929 #ifdef INVARIANTS
4930                 } else {
4931                         panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
4932 #endif
4933                 }
4934                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4935                 if (chk->data) {
4936                         if (so) {
4937                                 /* Still a socket? */
4938                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
4939                                     0, chk, SCTP_SO_LOCKED);
4940                         }
4941                         if (chk->data) {
4942                                 sctp_m_freem(chk->data);
4943                                 chk->data = NULL;
4944                         }
4945                 }
4946                 if (chk->holds_key_ref)
4947                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4948                 if (chk->whoTo) {
4949                         sctp_free_remote_addr(chk->whoTo);
4950                         chk->whoTo = NULL;
4951                 }
4952                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4953                 SCTP_DECR_CHK_COUNT();
4954                 /* sa_ignore FREED_MEMORY */
4955         }
4956         /* sent queue SHOULD be empty */
4957         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
4958                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
4959                         if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
4960                                 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
4961 #ifdef INVARIANTS
4962                         } else {
4963                                 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
4964 #endif
4965                         }
4966                 }
4967                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4968                 if (chk->data) {
4969                         if (so) {
4970                                 /* Still a socket? */
4971                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
4972                                     0, chk, SCTP_SO_LOCKED);
4973                         }
4974                         if (chk->data) {
4975                                 sctp_m_freem(chk->data);
4976                                 chk->data = NULL;
4977                         }
4978                 }
4979                 if (chk->holds_key_ref)
4980                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4981                 sctp_free_remote_addr(chk->whoTo);
4982                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4983                 SCTP_DECR_CHK_COUNT();
4984                 /* sa_ignore FREED_MEMORY */
4985         }
4986 #ifdef INVARIANTS
4987         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
4988                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
4989                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
4990                 }
4991         }
4992 #endif
4993         /* control queue MAY not be empty */
4994         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
4995                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4996                 if (chk->data) {
4997                         sctp_m_freem(chk->data);
4998                         chk->data = NULL;
4999                 }
5000                 if (chk->holds_key_ref)
5001                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5002                 sctp_free_remote_addr(chk->whoTo);
5003                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5004                 SCTP_DECR_CHK_COUNT();
5005                 /* sa_ignore FREED_MEMORY */
5006         }
5007         /* ASCONF queue MAY not be empty */
5008         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5009                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5010                 if (chk->data) {
5011                         sctp_m_freem(chk->data);
5012                         chk->data = NULL;
5013                 }
5014                 if (chk->holds_key_ref)
5015                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5016                 sctp_free_remote_addr(chk->whoTo);
5017                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5018                 SCTP_DECR_CHK_COUNT();
5019                 /* sa_ignore FREED_MEMORY */
5020         }
5021         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5022                 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5023                 if (chk->data) {
5024                         sctp_m_freem(chk->data);
5025                         chk->data = NULL;
5026                 }
5027                 if (chk->holds_key_ref)
5028                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5029                 sctp_free_remote_addr(chk->whoTo);
5030                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5031                 SCTP_DECR_CHK_COUNT();
5032                 /* sa_ignore FREED_MEMORY */
5033         }
5034
5035         if (asoc->mapping_array) {
5036                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5037                 asoc->mapping_array = NULL;
5038         }
5039         if (asoc->nr_mapping_array) {
5040                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5041                 asoc->nr_mapping_array = NULL;
5042         }
5043         /* the stream outs */
5044         if (asoc->strmout) {
5045                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5046                 asoc->strmout = NULL;
5047         }
5048         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5049         if (asoc->strmin) {
5050                 struct sctp_queued_to_read *ctl, *nctl;
5051
5052                 for (i = 0; i < asoc->streamincnt; i++) {
5053                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5054                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5055                                 sctp_free_remote_addr(ctl->whoFrom);
5056                                 if (ctl->data) {
5057                                         sctp_m_freem(ctl->data);
5058                                         ctl->data = NULL;
5059                                 }
5060                                 /*
5061                                  * We don't free the address here since all
5062                                  * the net's were freed above.
5063                                  */
5064                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5065                                 SCTP_DECR_READQ_COUNT();
5066                         }
5067                 }
5068                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5069                 asoc->strmin = NULL;
5070         }
5071         asoc->streamincnt = 0;
5072         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5073 #ifdef INVARIANTS
5074                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5075                         panic("no net's left alloc'ed, or list points to itself");
5076                 }
5077 #endif
5078                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5079                 sctp_free_remote_addr(net);
5080         }
5081         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5082                 /* sa_ignore FREED_MEMORY */
5083                 sctp_remove_laddr(laddr);
5084         }
5085
5086         /* pending asconf (address) parameters */
5087         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5088                 /* sa_ignore FREED_MEMORY */
5089                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5090                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5091         }
5092         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5093                 /* sa_ignore FREED_MEMORY */
5094                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5095                 if (aack->data != NULL) {
5096                         sctp_m_freem(aack->data);
5097                 }
5098                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5099         }
5100         /* clean up auth stuff */
5101         if (asoc->local_hmacs)
5102                 sctp_free_hmaclist(asoc->local_hmacs);
5103         if (asoc->peer_hmacs)
5104                 sctp_free_hmaclist(asoc->peer_hmacs);
5105
5106         if (asoc->local_auth_chunks)
5107                 sctp_free_chunklist(asoc->local_auth_chunks);
5108         if (asoc->peer_auth_chunks)
5109                 sctp_free_chunklist(asoc->peer_auth_chunks);
5110
5111         sctp_free_authinfo(&asoc->authinfo);
5112
5113         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5114                 LIST_REMOVE(shared_key, next);
5115                 sctp_free_sharedkey(shared_key);
5116                 /* sa_ignore FREED_MEMORY */
5117         }
5118
5119         /* Insert new items here :> */
5120
5121         /* Get rid of LOCK */
5122         SCTP_TCB_LOCK_DESTROY(stcb);
5123         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5124         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5125                 SCTP_INP_INFO_WUNLOCK();
5126                 SCTP_INP_RLOCK(inp);
5127         }
5128 #ifdef SCTP_TRACK_FREED_ASOCS
5129         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5130                 /* now clean up the tasoc itself */
5131                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5132                 SCTP_DECR_ASOC_COUNT();
5133         } else {
5134                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5135         }
5136 #else
5137         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5138         SCTP_DECR_ASOC_COUNT();
5139 #endif
5140         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5141                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5142                         /*
5143                          * If its NOT the inp_free calling us AND sctp_close
5144                          * as been called, we call back...
5145                          */
5146                         SCTP_INP_RUNLOCK(inp);
5147                         /*
5148                          * This will start the kill timer (if we are the
5149                          * last one) since we hold an increment yet. But
5150                          * this is the only safe way to do this since
5151                          * otherwise if the socket closes at the same time
5152                          * we are here we might collide in the cleanup.
5153                          */
5154                         sctp_inpcb_free(inp,
5155                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5156                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5157                         SCTP_INP_DECR_REF(inp);
5158                         goto out_of;
5159                 } else {
5160                         /* The socket is still open. */
5161                         SCTP_INP_DECR_REF(inp);
5162                 }
5163         }
5164         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5165                 SCTP_INP_RUNLOCK(inp);
5166         }
5167 out_of:
5168         /* destroyed the asoc */
5169 #ifdef SCTP_LOG_CLOSING
5170         sctp_log_closing(inp, NULL, 11);
5171 #endif
5172         return (1);
5173 }
5174
5175
5176
5177 /*
5178  * determine if a destination is "reachable" based upon the addresses bound
5179  * to the current endpoint (e.g. only v4 or v6 currently bound)
5180  */
5181 /*
5182  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5183  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5184  * types bound as its endpoint
5185  */
5186 int
5187 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5188 {
5189         struct sctp_inpcb *inp;
5190         int answer;
5191
5192         /*
5193          * No locks here, the TCB, in all cases is already locked and an
5194          * assoc is up. There is either a INP lock by the caller applied (in
5195          * asconf case when deleting an address) or NOT in the HB case,
5196          * however if HB then the INP increment is up and the INP will not
5197          * be removed (on top of the fact that we have a TCB lock). So we
5198          * only want to read the sctp_flags, which is either bound-all or
5199          * not.. no protection needed since once an assoc is up you can't be
5200          * changing your binding.
5201          */
5202         inp = stcb->sctp_ep;
5203         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5204                 /* if bound all, destination is not restricted */
5205                 /*
5206                  * RRS: Question during lock work: Is this correct? If you
5207                  * are bound-all you still might need to obey the V4--V6
5208                  * flags??? IMO this bound-all stuff needs to be removed!
5209                  */
5210                 return (1);
5211         }
5212         /* NOTE: all "scope" checks are done when local addresses are added */
5213         switch (destaddr->sa_family) {
5214 #ifdef INET6
5215         case AF_INET6:
5216                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5217                 break;
5218 #endif
5219 #ifdef INET
5220         case AF_INET:
5221                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5222                 break;
5223 #endif
5224         default:
5225                 /* invalid family, so it's unreachable */
5226                 answer = 0;
5227                 break;
5228         }
5229         return (answer);
5230 }
5231
5232 /*
5233  * update the inp_vflags on an endpoint
5234  */
5235 static void
5236 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5237 {
5238         struct sctp_laddr *laddr;
5239
5240         /* first clear the flag */
5241         inp->ip_inp.inp.inp_vflag = 0;
5242         /* set the flag based on addresses on the ep list */
5243         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5244                 if (laddr->ifa == NULL) {
5245                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5246                             __FUNCTION__);
5247                         continue;
5248                 }
5249                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5250                         continue;
5251                 }
5252                 switch (laddr->ifa->address.sa.sa_family) {
5253 #ifdef INET6
5254                 case AF_INET6:
5255                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5256                         break;
5257 #endif
5258 #ifdef INET
5259                 case AF_INET:
5260                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5261                         break;
5262 #endif
5263                 default:
5264                         break;
5265                 }
5266         }
5267 }
5268
5269 /*
5270  * Add the address to the endpoint local address list There is nothing to be
5271  * done if we are bound to all addresses
5272  */
5273 void
5274 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5275 {
5276         struct sctp_laddr *laddr;
5277         int fnd, error = 0;
5278
5279         fnd = 0;
5280
5281         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5282                 /* You are already bound to all. You have it already */
5283                 return;
5284         }
5285 #ifdef INET6
5286         if (ifa->address.sa.sa_family == AF_INET6) {
5287                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5288                         /* Can't bind a non-useable addr. */
5289                         return;
5290                 }
5291         }
5292 #endif
5293         /* first, is it already present? */
5294         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5295                 if (laddr->ifa == ifa) {
5296                         fnd = 1;
5297                         break;
5298                 }
5299         }
5300
5301         if (fnd == 0) {
5302                 /* Not in the ep list */
5303                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5304                 if (error != 0)
5305                         return;
5306                 inp->laddr_count++;
5307                 /* update inp_vflag flags */
5308                 switch (ifa->address.sa.sa_family) {
5309 #ifdef INET6
5310                 case AF_INET6:
5311                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5312                         break;
5313 #endif
5314 #ifdef INET
5315                 case AF_INET:
5316                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5317                         break;
5318 #endif
5319                 default:
5320                         break;
5321                 }
5322         }
5323         return;
5324 }
5325
5326
5327 /*
5328  * select a new (hopefully reachable) destination net (should only be used
5329  * when we deleted an ep addr that is the only usable source address to reach
5330  * the destination net)
5331  */
5332 static void
5333 sctp_select_primary_destination(struct sctp_tcb *stcb)
5334 {
5335         struct sctp_nets *net;
5336
5337         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5338                 /* for now, we'll just pick the first reachable one we find */
5339                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5340                         continue;
5341                 if (sctp_destination_is_reachable(stcb,
5342                     (struct sockaddr *)&net->ro._l_addr)) {
5343                         /* found a reachable destination */
5344                         stcb->asoc.primary_destination = net;
5345                 }
5346         }
5347         /* I can't there from here! ...we're gonna die shortly... */
5348 }
5349
5350
5351 /*
5352  * Delete the address from the endpoint local address list There is nothing
5353  * to be done if we are bound to all addresses
5354  */
5355 void
5356 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5357 {
5358         struct sctp_laddr *laddr;
5359         int fnd;
5360
5361         fnd = 0;
5362         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5363                 /* You are already bound to all. You have it already */
5364                 return;
5365         }
5366         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5367                 if (laddr->ifa == ifa) {
5368                         fnd = 1;
5369                         break;
5370                 }
5371         }
5372         if (fnd && (inp->laddr_count < 2)) {
5373                 /* can't delete unless there are at LEAST 2 addresses */
5374                 return;
5375         }
5376         if (fnd) {
5377                 /*
5378                  * clean up any use of this address go through our
5379                  * associations and clear any last_used_address that match
5380                  * this one for each assoc, see if a new primary_destination
5381                  * is needed
5382                  */
5383                 struct sctp_tcb *stcb;
5384
5385                 /* clean up "next_addr_touse" */
5386                 if (inp->next_addr_touse == laddr)
5387                         /* delete this address */
5388                         inp->next_addr_touse = NULL;
5389
5390                 /* clean up "last_used_address" */
5391                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5392                         struct sctp_nets *net;
5393
5394                         SCTP_TCB_LOCK(stcb);
5395                         if (stcb->asoc.last_used_address == laddr)
5396                                 /* delete this address */
5397                                 stcb->asoc.last_used_address = NULL;
5398                         /*
5399                          * Now spin through all the nets and purge any ref
5400                          * to laddr
5401                          */
5402                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5403                                 if (net->ro._s_addr &&
5404                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5405                                         /* Yep, purge src address selected */
5406                                         sctp_rtentry_t *rt;
5407
5408                                         /* delete this address if cached */
5409                                         rt = net->ro.ro_rt;
5410                                         if (rt != NULL) {
5411                                                 RTFREE(rt);
5412                                                 net->ro.ro_rt = NULL;
5413                                         }
5414                                         sctp_free_ifa(net->ro._s_addr);
5415                                         net->ro._s_addr = NULL;
5416                                         net->src_addr_selected = 0;
5417                                 }
5418                         }
5419                         SCTP_TCB_UNLOCK(stcb);
5420                 }               /* for each tcb */
5421                 /* remove it from the ep list */
5422                 sctp_remove_laddr(laddr);
5423                 inp->laddr_count--;
5424                 /* update inp_vflag flags */
5425                 sctp_update_ep_vflag(inp);
5426         }
5427         return;
5428 }
5429
5430 /*
5431  * Add the address to the TCB local address restricted list.
5432  * This is a "pending" address list (eg. addresses waiting for an
5433  * ASCONF-ACK response) and cannot be used as a valid source address.
5434  */
5435 void
5436 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5437 {
5438         struct sctp_laddr *laddr;
5439         struct sctpladdr *list;
5440
5441         /*
5442          * Assumes TCB is locked.. and possibly the INP. May need to
5443          * confirm/fix that if we need it and is not the case.
5444          */
5445         list = &stcb->asoc.sctp_restricted_addrs;
5446
5447 #ifdef INET6
5448         if (ifa->address.sa.sa_family == AF_INET6) {
5449                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5450                         /* Can't bind a non-existent addr. */
5451                         return;
5452                 }
5453         }
5454 #endif
5455         /* does the address already exist? */
5456         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5457                 if (laddr->ifa == ifa) {
5458                         return;
5459                 }
5460         }
5461
5462         /* add to the list */
5463         (void)sctp_insert_laddr(list, ifa, 0);
5464         return;
5465 }
5466
5467 /*
5468  * insert an laddr entry with the given ifa for the desired list
5469  */
5470 int
5471 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5472 {
5473         struct sctp_laddr *laddr;
5474
5475         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5476         if (laddr == NULL) {
5477                 /* out of memory? */
5478                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5479                 return (EINVAL);
5480         }
5481         SCTP_INCR_LADDR_COUNT();
5482         bzero(laddr, sizeof(*laddr));
5483         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5484         laddr->ifa = ifa;
5485         laddr->action = act;
5486         atomic_add_int(&ifa->refcount, 1);
5487         /* insert it */
5488         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5489
5490         return (0);
5491 }
5492
5493 /*
5494  * Remove an laddr entry from the local address list (on an assoc)
5495  */
5496 void
5497 sctp_remove_laddr(struct sctp_laddr *laddr)
5498 {
5499
5500         /* remove from the list */
5501         LIST_REMOVE(laddr, sctp_nxt_addr);
5502         sctp_free_ifa(laddr->ifa);
5503         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5504         SCTP_DECR_LADDR_COUNT();
5505 }
5506
5507 /*
5508  * Remove a local address from the TCB local address restricted list
5509  */
5510 void
5511 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5512 {
5513         struct sctp_inpcb *inp;
5514         struct sctp_laddr *laddr;
5515
5516         /*
5517          * This is called by asconf work. It is assumed that a) The TCB is
5518          * locked and b) The INP is locked. This is true in as much as I can
5519          * trace through the entry asconf code where I did these locks.
5520          * Again, the ASCONF code is a bit different in that it does lock
5521          * the INP during its work often times. This must be since we don't
5522          * want other proc's looking up things while what they are looking
5523          * up is changing :-D
5524          */
5525
5526         inp = stcb->sctp_ep;
5527         /* if subset bound and don't allow ASCONF's, can't delete last */
5528         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5529             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5530                 if (stcb->sctp_ep->laddr_count < 2) {
5531                         /* can't delete last address */
5532                         return;
5533                 }
5534         }
5535         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5536                 /* remove the address if it exists */
5537                 if (laddr->ifa == NULL)
5538                         continue;
5539                 if (laddr->ifa == ifa) {
5540                         sctp_remove_laddr(laddr);
5541                         return;
5542                 }
5543         }
5544
5545         /* address not found! */
5546         return;
5547 }
5548
5549 /*
5550  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5551  */
5552 /* sysctl */
5553 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5554 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5555
5556
5557
5558 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5559 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5560 int *sctp_cpuarry = NULL;
5561 void
5562 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5563 {
5564         /* Queue a packet to a processor for the specified core */
5565         struct sctp_mcore_queue *qent;
5566         struct sctp_mcore_ctrl *wkq;
5567         int need_wake = 0;
5568
5569         if (sctp_mcore_workers == NULL) {
5570                 /* Something went way bad during setup */
5571                 sctp_input_with_port(m, off, 0);
5572                 return;
5573         }
5574         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5575             (sizeof(struct sctp_mcore_queue)),
5576             SCTP_M_MCORE);
5577         if (qent == NULL) {
5578                 /* This is trouble  */
5579                 sctp_input_with_port(m, off, 0);
5580                 return;
5581         }
5582         qent->vn = curvnet;
5583         qent->m = m;
5584         qent->off = off;
5585         qent->v6 = 0;
5586         wkq = &sctp_mcore_workers[cpu_to_use];
5587         SCTP_MCORE_QLOCK(wkq);
5588
5589         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5590         if (wkq->running == 0) {
5591                 need_wake = 1;
5592         }
5593         SCTP_MCORE_QUNLOCK(wkq);
5594         if (need_wake) {
5595                 wakeup(&wkq->running);
5596         }
5597 }
5598
5599 static void
5600 sctp_mcore_thread(void *arg)
5601 {
5602
5603         struct sctp_mcore_ctrl *wkq;
5604         struct sctp_mcore_queue *qent;
5605
5606         wkq = (struct sctp_mcore_ctrl *)arg;
5607         struct mbuf *m;
5608         int off, v6;
5609
5610         /* Wait for first tickle */
5611         SCTP_MCORE_LOCK(wkq);
5612         wkq->running = 0;
5613         msleep(&wkq->running,
5614             &wkq->core_mtx,
5615             0, "wait for pkt", 0);
5616         SCTP_MCORE_UNLOCK(wkq);
5617
5618         /* Bind to our cpu */
5619         thread_lock(curthread);
5620         sched_bind(curthread, wkq->cpuid);
5621         thread_unlock(curthread);
5622
5623         /* Now lets start working */
5624         SCTP_MCORE_LOCK(wkq);
5625         /* Now grab lock and go */
5626         for (;;) {
5627                 SCTP_MCORE_QLOCK(wkq);
5628 skip_sleep:
5629                 wkq->running = 1;
5630                 qent = TAILQ_FIRST(&wkq->que);
5631                 if (qent) {
5632                         TAILQ_REMOVE(&wkq->que, qent, next);
5633                         SCTP_MCORE_QUNLOCK(wkq);
5634                         CURVNET_SET(qent->vn);
5635                         m = qent->m;
5636                         off = qent->off;
5637                         v6 = qent->v6;
5638                         SCTP_FREE(qent, SCTP_M_MCORE);
5639                         if (v6 == 0) {
5640                                 sctp_input_with_port(m, off, 0);
5641                         } else {
5642                                 SCTP_PRINTF("V6 not yet supported\n");
5643                                 sctp_m_freem(m);
5644                         }
5645                         CURVNET_RESTORE();
5646                         SCTP_MCORE_QLOCK(wkq);
5647                 }
5648                 wkq->running = 0;
5649                 if (!TAILQ_EMPTY(&wkq->que)) {
5650                         goto skip_sleep;
5651                 }
5652                 SCTP_MCORE_QUNLOCK(wkq);
5653                 msleep(&wkq->running,
5654                     &wkq->core_mtx,
5655                     0, "wait for pkt", 0);
5656         }
5657 }
5658
5659 static void
5660 sctp_startup_mcore_threads(void)
5661 {
5662         int i, cpu;
5663
5664         if (mp_ncpus == 1)
5665                 return;
5666
5667         if (sctp_mcore_workers != NULL) {
5668                 /*
5669                  * Already been here in some previous vnet?
5670                  */
5671                 return;
5672         }
5673         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5674             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5675             SCTP_M_MCORE);
5676         if (sctp_mcore_workers == NULL) {
5677                 /* TSNH I hope */
5678                 return;
5679         }
5680         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5681             sizeof(struct sctp_mcore_ctrl)));
5682         /* Init the structures */
5683         for (i = 0; i <= mp_maxid; i++) {
5684                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5685                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5686                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5687                 sctp_mcore_workers[i].cpuid = i;
5688         }
5689         if (sctp_cpuarry == NULL) {
5690                 SCTP_MALLOC(sctp_cpuarry, int *,
5691                     (mp_ncpus * sizeof(int)),
5692                     SCTP_M_MCORE);
5693                 i = 0;
5694                 CPU_FOREACH(cpu) {
5695                         sctp_cpuarry[i] = cpu;
5696                         i++;
5697                 }
5698         }
5699         /* Now start them all */
5700         CPU_FOREACH(cpu) {
5701                 (void)kproc_create(sctp_mcore_thread,
5702                     (void *)&sctp_mcore_workers[cpu],
5703                     &sctp_mcore_workers[cpu].thread_proc,
5704                     RFPROC,
5705                     SCTP_KTHREAD_PAGES,
5706                     SCTP_MCORE_NAME);
5707
5708         }
5709 }
5710
5711 #endif
5712
5713 void
5714 sctp_pcb_init()
5715 {
5716         /*
5717          * SCTP initialization for the PCB structures should be called by
5718          * the sctp_init() funciton.
5719          */
5720         int i;
5721         struct timeval tv;
5722
5723         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5724                 /* error I was called twice */
5725                 return;
5726         }
5727         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5728
5729 #if defined(SCTP_LOCAL_TRACE_BUF)
5730         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5731 #endif
5732 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5733         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5734             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5735             SCTP_M_MCORE);
5736 #endif
5737         (void)SCTP_GETTIME_TIMEVAL(&tv);
5738 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5739         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5740         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5741         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5742 #else
5743         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5744         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5745         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5746 #endif
5747         /* init the empty list of (All) Endpoints */
5748         LIST_INIT(&SCTP_BASE_INFO(listhead));
5749
5750
5751         /* init the hash table of endpoints */
5752         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5753         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5754         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5755         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5756             &SCTP_BASE_INFO(hashasocmark));
5757         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5758             &SCTP_BASE_INFO(hashmark));
5759         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5760             &SCTP_BASE_INFO(hashtcpmark));
5761         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5762
5763
5764         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5765             &SCTP_BASE_INFO(hashvrfmark));
5766
5767         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5768             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5769         /* init the zones */
5770         /*
5771          * FIX ME: Should check for NULL returns, but if it does fail we are
5772          * doomed to panic anyways... add later maybe.
5773          */
5774         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5775             sizeof(struct sctp_inpcb), maxsockets);
5776
5777         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5778             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5779
5780         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5781             sizeof(struct sctp_laddr),
5782             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5783
5784         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5785             sizeof(struct sctp_nets),
5786             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5787
5788         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5789             sizeof(struct sctp_tmit_chunk),
5790             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5791
5792         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5793             sizeof(struct sctp_queued_to_read),
5794             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5795
5796         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5797             sizeof(struct sctp_stream_queue_pending),
5798             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5799
5800         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5801             sizeof(struct sctp_asconf),
5802             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5803
5804         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5805             sizeof(struct sctp_asconf_ack),
5806             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5807
5808
5809         /* Master Lock INIT for info structure */
5810         SCTP_INP_INFO_LOCK_INIT();
5811         SCTP_STATLOG_INIT_LOCK();
5812
5813         SCTP_IPI_COUNT_INIT();
5814         SCTP_IPI_ADDR_INIT();
5815 #ifdef SCTP_PACKET_LOGGING
5816         SCTP_IP_PKTLOG_INIT();
5817 #endif
5818         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5819
5820         SCTP_WQ_ADDR_INIT();
5821         /* not sure if we need all the counts */
5822         SCTP_BASE_INFO(ipi_count_ep) = 0;
5823         /* assoc/tcb zone info */
5824         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5825         /* local addrlist zone info */
5826         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5827         /* remote addrlist zone info */
5828         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5829         /* chunk info */
5830         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5831
5832         /* socket queue zone info */
5833         SCTP_BASE_INFO(ipi_count_readq) = 0;
5834
5835         /* stream out queue cont */
5836         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5837
5838         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5839         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5840
5841         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5842
5843         /* Init the TIMEWAIT list */
5844         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5845                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5846         }
5847
5848         sctp_startup_iterator();
5849
5850 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5851         sctp_startup_mcore_threads();
5852 #endif
5853
5854         /*
5855          * INIT the default VRF which for BSD is the only one, other O/S's
5856          * may have more. But initially they must start with one and then
5857          * add the VRF's as addresses are added.
5858          */
5859         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5860 }
5861
5862 /*
5863  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5864  */
5865 void
5866 sctp_pcb_finish(void)
5867 {
5868         struct sctp_vrflist *vrf_bucket;
5869         struct sctp_vrf *vrf, *nvrf;
5870         struct sctp_ifn *ifn, *nifn;
5871         struct sctp_ifa *ifa, *nifa;
5872         struct sctpvtaghead *chain;
5873         struct sctp_tagblock *twait_block, *prev_twait_block;
5874         struct sctp_laddr *wi, *nwi;
5875         int i;
5876
5877         /*
5878          * Free BSD the it thread never exits but we do clean up. The only
5879          * way freebsd reaches here if we have VRF's but we still add the
5880          * ifdef to make it compile on old versions.
5881          */
5882         {
5883                 struct sctp_iterator *it, *nit;
5884
5885                 SCTP_IPI_ITERATOR_WQ_LOCK();
5886                 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5887                         if (it->vn != curvnet) {
5888                                 continue;
5889                         }
5890                         TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5891                         if (it->function_atend != NULL) {
5892                                 (*it->function_atend) (it->pointer, it->val);
5893                         }
5894                         SCTP_FREE(it, SCTP_M_ITER);
5895                 }
5896                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5897                 SCTP_ITERATOR_LOCK();
5898                 if ((sctp_it_ctl.cur_it) &&
5899                     (sctp_it_ctl.cur_it->vn == curvnet)) {
5900                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5901                 }
5902                 SCTP_ITERATOR_UNLOCK();
5903         }
5904
5905         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5906         SCTP_WQ_ADDR_LOCK();
5907         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5908                 LIST_REMOVE(wi, sctp_nxt_addr);
5909                 SCTP_DECR_LADDR_COUNT();
5910                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5911         }
5912         SCTP_WQ_ADDR_UNLOCK();
5913
5914         /*
5915          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5916          * destroyed first).
5917          */
5918         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5919         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5920                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5921                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5922                                 /* free the ifa */
5923                                 LIST_REMOVE(ifa, next_bucket);
5924                                 LIST_REMOVE(ifa, next_ifa);
5925                                 SCTP_FREE(ifa, SCTP_M_IFA);
5926                         }
5927                         /* free the ifn */
5928                         LIST_REMOVE(ifn, next_bucket);
5929                         LIST_REMOVE(ifn, next_ifn);
5930                         SCTP_FREE(ifn, SCTP_M_IFN);
5931                 }
5932                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5933                 /* free the vrf */
5934                 LIST_REMOVE(vrf, next_vrf);
5935                 SCTP_FREE(vrf, SCTP_M_VRF);
5936         }
5937         /* free the vrf hashes */
5938         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5939         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5940
5941         /*
5942          * free the TIMEWAIT list elements malloc'd in the function
5943          * sctp_add_vtag_to_timewait()...
5944          */
5945         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5946                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5947                 if (!LIST_EMPTY(chain)) {
5948                         prev_twait_block = NULL;
5949                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5950                                 if (prev_twait_block) {
5951                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5952                                 }
5953                                 prev_twait_block = twait_block;
5954                         }
5955                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5956                 }
5957         }
5958
5959         /* free the locks and mutexes */
5960 #ifdef SCTP_PACKET_LOGGING
5961         SCTP_IP_PKTLOG_DESTROY();
5962 #endif
5963         SCTP_IPI_ADDR_DESTROY();
5964         SCTP_STATLOG_DESTROY();
5965         SCTP_INP_INFO_LOCK_DESTROY();
5966
5967         SCTP_WQ_ADDR_DESTROY();
5968
5969         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5970         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5971         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5972         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5973         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5974         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5975         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5976         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5977         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5978         /* Get rid of other stuff to */
5979         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5980                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5981         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5982                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5983         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5984                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5985 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5986         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
5987 #endif
5988 }
5989
5990
5991 int
5992 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5993     int offset, int limit,
5994     struct sockaddr *src, struct sockaddr *dst,
5995     struct sockaddr *altsa)
5996 {
5997         /*
5998          * grub through the INIT pulling addresses and loading them to the
5999          * nets structure in the asoc. The from address in the mbuf should
6000          * also be loaded (if it is not already). This routine can be called
6001          * with either INIT or INIT-ACK's as long as the m points to the IP
6002          * packet and the offset points to the beginning of the parameters.
6003          */
6004         struct sctp_inpcb *inp;
6005         struct sctp_nets *net, *nnet, *net_tmp;
6006         struct sctp_paramhdr *phdr, parm_buf;
6007         struct sctp_tcb *stcb_tmp;
6008         uint16_t ptype, plen;
6009         struct sockaddr *sa;
6010         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6011         struct sctp_auth_random *p_random = NULL;
6012         uint16_t random_len = 0;
6013         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6014         struct sctp_auth_hmac_algo *hmacs = NULL;
6015         uint16_t hmacs_len = 0;
6016         uint8_t saw_asconf = 0;
6017         uint8_t saw_asconf_ack = 0;
6018         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6019         struct sctp_auth_chunk_list *chunks = NULL;
6020         uint16_t num_chunks = 0;
6021         sctp_key_t *new_key;
6022         uint32_t keylen;
6023         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6024         uint8_t ecn_allowed;
6025
6026 #ifdef INET
6027         struct sockaddr_in sin;
6028
6029 #endif
6030 #ifdef INET6
6031         struct sockaddr_in6 sin6;
6032
6033 #endif
6034
6035         /* First get the destination address setup too. */
6036 #ifdef INET
6037         memset(&sin, 0, sizeof(sin));
6038         sin.sin_family = AF_INET;
6039         sin.sin_len = sizeof(sin);
6040         sin.sin_port = stcb->rport;
6041 #endif
6042 #ifdef INET6
6043         memset(&sin6, 0, sizeof(sin6));
6044         sin6.sin6_family = AF_INET6;
6045         sin6.sin6_len = sizeof(struct sockaddr_in6);
6046         sin6.sin6_port = stcb->rport;
6047 #endif
6048         if (altsa) {
6049                 sa = altsa;
6050         } else {
6051                 sa = src;
6052         }
6053         /* Turn off ECN until we get through all params */
6054         ecn_allowed = 0;
6055         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6056                 /* mark all addresses that we have currently on the list */
6057                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6058         }
6059         /* does the source address already exist? if so skip it */
6060         inp = stcb->sctp_ep;
6061         atomic_add_int(&stcb->asoc.refcnt, 1);
6062         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6063         atomic_add_int(&stcb->asoc.refcnt, -1);
6064
6065         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6066                 /* we must add the source address */
6067                 /* no scope set here since we have a tcb already. */
6068                 switch (sa->sa_family) {
6069 #ifdef INET
6070                 case AF_INET:
6071                         if (stcb->asoc.scope.ipv4_addr_legal) {
6072                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6073                                         return (-1);
6074                                 }
6075                         }
6076                         break;
6077 #endif
6078 #ifdef INET6
6079                 case AF_INET6:
6080                         if (stcb->asoc.scope.ipv6_addr_legal) {
6081                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6082                                         return (-2);
6083                                 }
6084                         }
6085                         break;
6086 #endif
6087                 default:
6088                         break;
6089                 }
6090         } else {
6091                 if (net_tmp != NULL && stcb_tmp == stcb) {
6092                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6093                 } else if (stcb_tmp != stcb) {
6094                         /* It belongs to another association? */
6095                         if (stcb_tmp)
6096                                 SCTP_TCB_UNLOCK(stcb_tmp);
6097                         return (-3);
6098                 }
6099         }
6100         if (stcb->asoc.state == 0) {
6101                 /* the assoc was freed? */
6102                 return (-4);
6103         }
6104         /*
6105          * peer must explicitly turn this on. This may have been initialized
6106          * to be "on" in order to allow local addr changes while INIT's are
6107          * in flight.
6108          */
6109         stcb->asoc.peer_supports_asconf = 0;
6110         /* now we must go through each of the params. */
6111         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6112         while (phdr) {
6113                 ptype = ntohs(phdr->param_type);
6114                 plen = ntohs(phdr->param_length);
6115                 /*
6116                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6117                  * (uint32_t)ptype, (int)plen);
6118                  */
6119                 if (offset + plen > limit) {
6120                         break;
6121                 }
6122                 if (plen == 0) {
6123                         break;
6124                 }
6125 #ifdef INET
6126                 if (ptype == SCTP_IPV4_ADDRESS) {
6127                         if (stcb->asoc.scope.ipv4_addr_legal) {
6128                                 struct sctp_ipv4addr_param *p4, p4_buf;
6129
6130                                 /* ok get the v4 address and check/add */
6131                                 phdr = sctp_get_next_param(m, offset,
6132                                     (struct sctp_paramhdr *)&p4_buf,
6133                                     sizeof(p4_buf));
6134                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6135                                     phdr == NULL) {
6136                                         return (-5);
6137                                 }
6138                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6139                                 sin.sin_addr.s_addr = p4->addr;
6140                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6141                                         /* Skip multi-cast addresses */
6142                                         goto next_param;
6143                                 }
6144                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6145                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6146                                         goto next_param;
6147                                 }
6148                                 sa = (struct sockaddr *)&sin;
6149                                 inp = stcb->sctp_ep;
6150                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6151                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6152                                     dst, stcb);
6153                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6154
6155                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6156                                     inp == NULL) {
6157                                         /* we must add the source address */
6158                                         /*
6159                                          * no scope set since we have a tcb
6160                                          * already
6161                                          */
6162
6163                                         /*
6164                                          * we must validate the state again
6165                                          * here
6166                                          */
6167                         add_it_now:
6168                                         if (stcb->asoc.state == 0) {
6169                                                 /* the assoc was freed? */
6170                                                 return (-7);
6171                                         }
6172                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6173                                                 return (-8);
6174                                         }
6175                                 } else if (stcb_tmp == stcb) {
6176                                         if (stcb->asoc.state == 0) {
6177                                                 /* the assoc was freed? */
6178                                                 return (-10);
6179                                         }
6180                                         if (net != NULL) {
6181                                                 /* clear flag */
6182                                                 net->dest_state &=
6183                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6184                                         }
6185                                 } else {
6186                                         /*
6187                                          * strange, address is in another
6188                                          * assoc? straighten out locks.
6189                                          */
6190                                         if (stcb_tmp) {
6191                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6192                                                         /*
6193                                                          * in setup state we
6194                                                          * abort this guy
6195                                                          */
6196                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6197                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6198                                                         goto add_it_now;
6199                                                 }
6200                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6201                                         }
6202                                         if (stcb->asoc.state == 0) {
6203                                                 /* the assoc was freed? */
6204                                                 return (-12);
6205                                         }
6206                                         return (-13);
6207                                 }
6208                         }
6209                 } else
6210 #endif
6211 #ifdef INET6
6212                 if (ptype == SCTP_IPV6_ADDRESS) {
6213                         if (stcb->asoc.scope.ipv6_addr_legal) {
6214                                 /* ok get the v6 address and check/add */
6215                                 struct sctp_ipv6addr_param *p6, p6_buf;
6216
6217                                 phdr = sctp_get_next_param(m, offset,
6218                                     (struct sctp_paramhdr *)&p6_buf,
6219                                     sizeof(p6_buf));
6220                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6221                                     phdr == NULL) {
6222                                         return (-14);
6223                                 }
6224                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6225                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6226                                     sizeof(p6->addr));
6227                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6228                                         /* Skip multi-cast addresses */
6229                                         goto next_param;
6230                                 }
6231                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6232                                         /*
6233                                          * Link local make no sense without
6234                                          * scope
6235                                          */
6236                                         goto next_param;
6237                                 }
6238                                 sa = (struct sockaddr *)&sin6;
6239                                 inp = stcb->sctp_ep;
6240                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6241                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6242                                     dst, stcb);
6243                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6244                                 if (stcb_tmp == NULL &&
6245                                     (inp == stcb->sctp_ep || inp == NULL)) {
6246                                         /*
6247                                          * we must validate the state again
6248                                          * here
6249                                          */
6250                         add_it_now6:
6251                                         if (stcb->asoc.state == 0) {
6252                                                 /* the assoc was freed? */
6253                                                 return (-16);
6254                                         }
6255                                         /*
6256                                          * we must add the address, no scope
6257                                          * set
6258                                          */
6259                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6260                                                 return (-17);
6261                                         }
6262                                 } else if (stcb_tmp == stcb) {
6263                                         /*
6264                                          * we must validate the state again
6265                                          * here
6266                                          */
6267                                         if (stcb->asoc.state == 0) {
6268                                                 /* the assoc was freed? */
6269                                                 return (-19);
6270                                         }
6271                                         if (net != NULL) {
6272                                                 /* clear flag */
6273                                                 net->dest_state &=
6274                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6275                                         }
6276                                 } else {
6277                                         /*
6278                                          * strange, address is in another
6279                                          * assoc? straighten out locks.
6280                                          */
6281                                         if (stcb_tmp)
6282                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6283                                                         /*
6284                                                          * in setup state we
6285                                                          * abort this guy
6286                                                          */
6287                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6288                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6289                                                         goto add_it_now6;
6290                                                 }
6291                                         SCTP_TCB_UNLOCK(stcb_tmp);
6292
6293                                         if (stcb->asoc.state == 0) {
6294                                                 /* the assoc was freed? */
6295                                                 return (-21);
6296                                         }
6297                                         return (-22);
6298                                 }
6299                         }
6300                 } else
6301 #endif
6302                 if (ptype == SCTP_ECN_CAPABLE) {
6303                         ecn_allowed = 1;
6304                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6305                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6306                                 struct sctp_adaptation_layer_indication ai,
6307                                                                 *aip;
6308
6309                                 phdr = sctp_get_next_param(m, offset,
6310                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6311                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6312                                 if (aip) {
6313                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6314                                         stcb->asoc.adaptation_needed = 1;
6315                                 }
6316                         }
6317                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6318                         struct sctp_asconf_addr_param lstore, *fee;
6319                         int lptype;
6320                         struct sockaddr *lsa = NULL;
6321
6322 #ifdef INET
6323                         struct sctp_asconf_addrv4_param *fii;
6324
6325 #endif
6326
6327                         stcb->asoc.peer_supports_asconf = 1;
6328                         if (plen > sizeof(lstore)) {
6329                                 return (-23);
6330                         }
6331                         phdr = sctp_get_next_param(m, offset,
6332                             (struct sctp_paramhdr *)&lstore,
6333                             min(plen, sizeof(lstore)));
6334                         if (phdr == NULL) {
6335                                 return (-24);
6336                         }
6337                         fee = (struct sctp_asconf_addr_param *)phdr;
6338                         lptype = ntohs(fee->addrp.ph.param_type);
6339                         switch (lptype) {
6340 #ifdef INET
6341                         case SCTP_IPV4_ADDRESS:
6342                                 if (plen !=
6343                                     sizeof(struct sctp_asconf_addrv4_param)) {
6344                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6345                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6346                                             plen);
6347                                 } else {
6348                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6349                                         sin.sin_addr.s_addr = fii->addrp.addr;
6350                                         lsa = (struct sockaddr *)&sin;
6351                                 }
6352                                 break;
6353 #endif
6354 #ifdef INET6
6355                         case SCTP_IPV6_ADDRESS:
6356                                 if (plen !=
6357                                     sizeof(struct sctp_asconf_addr_param)) {
6358                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6359                                             (int)sizeof(struct sctp_asconf_addr_param),
6360                                             plen);
6361                                 } else {
6362                                         memcpy(sin6.sin6_addr.s6_addr,
6363                                             fee->addrp.addr,
6364                                             sizeof(fee->addrp.addr));
6365                                         lsa = (struct sockaddr *)&sin6;
6366                                 }
6367                                 break;
6368 #endif
6369                         default:
6370                                 break;
6371                         }
6372                         if (lsa) {
6373                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6374                         }
6375                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6376                         stcb->asoc.peer_supports_nat = 1;
6377                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6378                         /* Peer supports pr-sctp */
6379                         stcb->asoc.peer_supports_prsctp = 1;
6380                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6381                         /* A supported extension chunk */
6382                         struct sctp_supported_chunk_types_param *pr_supported;
6383                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6384                         int num_ent, i;
6385
6386                         phdr = sctp_get_next_param(m, offset,
6387                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6388                         if (phdr == NULL) {
6389                                 return (-25);
6390                         }
6391                         stcb->asoc.peer_supports_asconf = 0;
6392                         stcb->asoc.peer_supports_prsctp = 0;
6393                         stcb->asoc.peer_supports_pktdrop = 0;
6394                         stcb->asoc.peer_supports_strreset = 0;
6395                         stcb->asoc.peer_supports_nr_sack = 0;
6396                         stcb->asoc.peer_supports_auth = 0;
6397                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6398                         num_ent = plen - sizeof(struct sctp_paramhdr);
6399                         for (i = 0; i < num_ent; i++) {
6400                                 switch (pr_supported->chunk_types[i]) {
6401                                 case SCTP_ASCONF:
6402                                 case SCTP_ASCONF_ACK:
6403                                         stcb->asoc.peer_supports_asconf = 1;
6404                                         break;
6405                                 case SCTP_FORWARD_CUM_TSN:
6406                                         stcb->asoc.peer_supports_prsctp = 1;
6407                                         break;
6408                                 case SCTP_PACKET_DROPPED:
6409                                         stcb->asoc.peer_supports_pktdrop = 1;
6410                                         break;
6411                                 case SCTP_NR_SELECTIVE_ACK:
6412                                         stcb->asoc.peer_supports_nr_sack = 1;
6413                                         break;
6414                                 case SCTP_STREAM_RESET:
6415                                         stcb->asoc.peer_supports_strreset = 1;
6416                                         break;
6417                                 case SCTP_AUTHENTICATION:
6418                                         stcb->asoc.peer_supports_auth = 1;
6419                                         break;
6420                                 default:
6421                                         /* one I have not learned yet */
6422                                         break;
6423
6424                                 }
6425                         }
6426                 } else if (ptype == SCTP_RANDOM) {
6427                         if (plen > sizeof(random_store))
6428                                 break;
6429                         if (got_random) {
6430                                 /* already processed a RANDOM */
6431                                 goto next_param;
6432                         }
6433                         phdr = sctp_get_next_param(m, offset,
6434                             (struct sctp_paramhdr *)random_store,
6435                             min(sizeof(random_store), plen));
6436                         if (phdr == NULL)
6437                                 return (-26);
6438                         p_random = (struct sctp_auth_random *)phdr;
6439                         random_len = plen - sizeof(*p_random);
6440                         /* enforce the random length */
6441                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6442                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6443                                 return (-27);
6444                         }
6445                         got_random = 1;
6446                 } else if (ptype == SCTP_HMAC_LIST) {
6447                         int num_hmacs;
6448                         int i;
6449
6450                         if (plen > sizeof(hmacs_store))
6451                                 break;
6452                         if (got_hmacs) {
6453                                 /* already processed a HMAC list */
6454                                 goto next_param;
6455                         }
6456                         phdr = sctp_get_next_param(m, offset,
6457                             (struct sctp_paramhdr *)hmacs_store,
6458                             min(plen, sizeof(hmacs_store)));
6459                         if (phdr == NULL)
6460                                 return (-28);
6461                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6462                         hmacs_len = plen - sizeof(*hmacs);
6463                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6464                         /* validate the hmac list */
6465                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6466                                 return (-29);
6467                         }
6468                         if (stcb->asoc.peer_hmacs != NULL)
6469                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6470                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6471                         if (stcb->asoc.peer_hmacs != NULL) {
6472                                 for (i = 0; i < num_hmacs; i++) {
6473                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6474                                             ntohs(hmacs->hmac_ids[i]));
6475                                 }
6476                         }
6477                         got_hmacs = 1;
6478                 } else if (ptype == SCTP_CHUNK_LIST) {
6479                         int i;
6480
6481                         if (plen > sizeof(chunks_store))
6482                                 break;
6483                         if (got_chklist) {
6484                                 /* already processed a Chunks list */
6485                                 goto next_param;
6486                         }
6487                         phdr = sctp_get_next_param(m, offset,
6488                             (struct sctp_paramhdr *)chunks_store,
6489                             min(plen, sizeof(chunks_store)));
6490                         if (phdr == NULL)
6491                                 return (-30);
6492                         chunks = (struct sctp_auth_chunk_list *)phdr;
6493                         num_chunks = plen - sizeof(*chunks);
6494                         if (stcb->asoc.peer_auth_chunks != NULL)
6495                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6496                         else
6497                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6498                         for (i = 0; i < num_chunks; i++) {
6499                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6500                                     stcb->asoc.peer_auth_chunks);
6501                                 /* record asconf/asconf-ack if listed */
6502                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6503                                         saw_asconf = 1;
6504                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6505                                         saw_asconf_ack = 1;
6506
6507                         }
6508                         got_chklist = 1;
6509                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6510                             (ptype == SCTP_STATE_COOKIE) ||
6511                             (ptype == SCTP_UNRECOG_PARAM) ||
6512                             (ptype == SCTP_COOKIE_PRESERVE) ||
6513                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6514                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6515                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6516                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6517                     (ptype == SCTP_SUCCESS_REPORT)) {
6518                          /* don't care */ ;
6519                 } else {
6520                         if ((ptype & 0x8000) == 0x0000) {
6521                                 /*
6522                                  * must stop processing the rest of the
6523                                  * param's. Any report bits were handled
6524                                  * with the call to
6525                                  * sctp_arethere_unrecognized_parameters()
6526                                  * when the INIT or INIT-ACK was first seen.
6527                                  */
6528                                 break;
6529                         }
6530                 }
6531
6532 next_param:
6533                 offset += SCTP_SIZE32(plen);
6534                 if (offset >= limit) {
6535                         break;
6536                 }
6537                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6538                     sizeof(parm_buf));
6539         }
6540         /* Now check to see if we need to purge any addresses */
6541         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6542                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6543                     SCTP_ADDR_NOT_IN_ASSOC) {
6544                         /* This address has been removed from the asoc */
6545                         /* remove and free it */
6546                         stcb->asoc.numnets--;
6547                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6548                         sctp_free_remote_addr(net);
6549                         if (net == stcb->asoc.primary_destination) {
6550                                 stcb->asoc.primary_destination = NULL;
6551                                 sctp_select_primary_destination(stcb);
6552                         }
6553                 }
6554         }
6555         if (ecn_allowed == 0) {
6556                 stcb->asoc.ecn_allowed = 0;
6557         }
6558         /* validate authentication required parameters */
6559         if (got_random && got_hmacs) {
6560                 stcb->asoc.peer_supports_auth = 1;
6561         } else {
6562                 stcb->asoc.peer_supports_auth = 0;
6563         }
6564         if (!stcb->asoc.peer_supports_auth && got_chklist) {
6565                 /* peer does not support auth but sent a chunks list? */
6566                 return (-31);
6567         }
6568         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6569             !stcb->asoc.peer_supports_auth) {
6570                 /* peer supports asconf but not auth? */
6571                 return (-32);
6572         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6573             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6574                 return (-33);
6575         }
6576         /* concatenate the full random key */
6577         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6578         if (chunks != NULL) {
6579                 keylen += sizeof(*chunks) + num_chunks;
6580         }
6581         new_key = sctp_alloc_key(keylen);
6582         if (new_key != NULL) {
6583                 /* copy in the RANDOM */
6584                 if (p_random != NULL) {
6585                         keylen = sizeof(*p_random) + random_len;
6586                         bcopy(p_random, new_key->key, keylen);
6587                 }
6588                 /* append in the AUTH chunks */
6589                 if (chunks != NULL) {
6590                         bcopy(chunks, new_key->key + keylen,
6591                             sizeof(*chunks) + num_chunks);
6592                         keylen += sizeof(*chunks) + num_chunks;
6593                 }
6594                 /* append in the HMACs */
6595                 if (hmacs != NULL) {
6596                         bcopy(hmacs, new_key->key + keylen,
6597                             sizeof(*hmacs) + hmacs_len);
6598                 }
6599         } else {
6600                 /* failed to get memory for the key */
6601                 return (-34);
6602         }
6603         if (stcb->asoc.authinfo.peer_random != NULL)
6604                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6605         stcb->asoc.authinfo.peer_random = new_key;
6606         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6607         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6608
6609         return (0);
6610 }
6611
6612 int
6613 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6614     struct sctp_nets *net)
6615 {
6616         /* make sure the requested primary address exists in the assoc */
6617         if (net == NULL && sa)
6618                 net = sctp_findnet(stcb, sa);
6619
6620         if (net == NULL) {
6621                 /* didn't find the requested primary address! */
6622                 return (-1);
6623         } else {
6624                 /* set the primary address */
6625                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6626                         /* Must be confirmed, so queue to set */
6627                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6628                         return (0);
6629                 }
6630                 stcb->asoc.primary_destination = net;
6631                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6632                         sctp_free_remote_addr(stcb->asoc.alternate);
6633                         stcb->asoc.alternate = NULL;
6634                 }
6635                 net = TAILQ_FIRST(&stcb->asoc.nets);
6636                 if (net != stcb->asoc.primary_destination) {
6637                         /*
6638                          * first one on the list is NOT the primary
6639                          * sctp_cmpaddr() is much more efficient if the
6640                          * primary is the first on the list, make it so.
6641                          */
6642                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6643                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6644                 }
6645                 return (0);
6646         }
6647 }
6648
6649 int
6650 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6651 {
6652         /*
6653          * This function serves two purposes. It will see if a TAG can be
6654          * re-used and return 1 for yes it is ok and 0 for don't use that
6655          * tag. A secondary function it will do is purge out old tags that
6656          * can be removed.
6657          */
6658         struct sctpvtaghead *chain;
6659         struct sctp_tagblock *twait_block;
6660         struct sctpasochead *head;
6661         struct sctp_tcb *stcb;
6662         int i;
6663
6664         SCTP_INP_INFO_RLOCK();
6665         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6666             SCTP_BASE_INFO(hashasocmark))];
6667         if (head == NULL) {
6668                 /* invalid vtag */
6669                 goto skip_vtag_check;
6670         }
6671         LIST_FOREACH(stcb, head, sctp_asocs) {
6672                 /*
6673                  * We choose not to lock anything here. TCB's can't be
6674                  * removed since we have the read lock, so they can't be
6675                  * freed on us, same thing for the INP. I may be wrong with
6676                  * this assumption, but we will go with it for now :-)
6677                  */
6678                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6679                         continue;
6680                 }
6681                 if (stcb->asoc.my_vtag == tag) {
6682                         /* candidate */
6683                         if (stcb->rport != rport) {
6684                                 continue;
6685                         }
6686                         if (stcb->sctp_ep->sctp_lport != lport) {
6687                                 continue;
6688                         }
6689                         /* Its a used tag set */
6690                         SCTP_INP_INFO_RUNLOCK();
6691                         return (0);
6692                 }
6693         }
6694 skip_vtag_check:
6695
6696         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6697         /* Now what about timed wait ? */
6698         if (!LIST_EMPTY(chain)) {
6699                 /*
6700                  * Block(s) are present, lets see if we have this tag in the
6701                  * list
6702                  */
6703                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6704                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6705                                 if (twait_block->vtag_block[i].v_tag == 0) {
6706                                         /* not used */
6707                                         continue;
6708                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6709                                     now->tv_sec) {
6710                                         /* Audit expires this guy */
6711                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
6712                                         twait_block->vtag_block[i].v_tag = 0;
6713                                         twait_block->vtag_block[i].lport = 0;
6714                                         twait_block->vtag_block[i].rport = 0;
6715                                 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6716                                             (twait_block->vtag_block[i].lport == lport) &&
6717                                     (twait_block->vtag_block[i].rport == rport)) {
6718                                         /* Bad tag, sorry :< */
6719                                         SCTP_INP_INFO_RUNLOCK();
6720                                         return (0);
6721                                 }
6722                         }
6723                 }
6724         }
6725         SCTP_INP_INFO_RUNLOCK();
6726         return (1);
6727 }
6728
6729 static void
6730 sctp_drain_mbufs(struct sctp_tcb *stcb)
6731 {
6732         /*
6733          * We must hunt this association for MBUF's past the cumack (i.e.
6734          * out of order data that we can renege on).
6735          */
6736         struct sctp_association *asoc;
6737         struct sctp_tmit_chunk *chk, *nchk;
6738         uint32_t cumulative_tsn_p1;
6739         struct sctp_queued_to_read *ctl, *nctl;
6740         int cnt, strmat;
6741         uint32_t gap, i;
6742         int fnd = 0;
6743
6744         /* We look for anything larger than the cum-ack + 1 */
6745
6746         asoc = &stcb->asoc;
6747         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6748                 /* none we can reneg on. */
6749                 return;
6750         }
6751         SCTP_STAT_INCR(sctps_protocol_drains_done);
6752         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6753         cnt = 0;
6754         /* First look in the re-assembly queue */
6755         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6756                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6757                         /* Yep it is above cum-ack */
6758                         cnt++;
6759                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6760                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6761                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6762                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6763                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6764                         if (chk->data) {
6765                                 sctp_m_freem(chk->data);
6766                                 chk->data = NULL;
6767                         }
6768                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6769                 }
6770         }
6771         /* Ok that was fun, now we will drain all the inbound streams? */
6772         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6773                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6774                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6775                                 /* Yep it is above cum-ack */
6776                                 cnt++;
6777                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6778                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6779                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6780                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6781                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6782                                 if (ctl->data) {
6783                                         sctp_m_freem(ctl->data);
6784                                         ctl->data = NULL;
6785                                 }
6786                                 sctp_free_remote_addr(ctl->whoFrom);
6787                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6788                                 SCTP_DECR_READQ_COUNT();
6789                         }
6790                 }
6791         }
6792         if (cnt) {
6793                 /* We must back down to see what the new highest is */
6794                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6795                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6796                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6797                                 asoc->highest_tsn_inside_map = i;
6798                                 fnd = 1;
6799                                 break;
6800                         }
6801                 }
6802                 if (!fnd) {
6803                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6804                 }
6805                 /*
6806                  * Question, should we go through the delivery queue? The
6807                  * only reason things are on here is the app not reading OR
6808                  * a p-d-api up. An attacker COULD send enough in to
6809                  * initiate the PD-API and then send a bunch of stuff to
6810                  * other streams... these would wind up on the delivery
6811                  * queue.. and then we would not get to them. But in order
6812                  * to do this I then have to back-track and un-deliver
6813                  * sequence numbers in streams.. el-yucko. I think for now
6814                  * we will NOT look at the delivery queue and leave it to be
6815                  * something to consider later. An alternative would be to
6816                  * abort the P-D-API with a notification and then deliver
6817                  * the data.... Or another method might be to keep track of
6818                  * how many times the situation occurs and if we see a
6819                  * possible attack underway just abort the association.
6820                  */
6821 #ifdef SCTP_DEBUG
6822                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6823 #endif
6824                 /*
6825                  * Now do we need to find a new
6826                  * asoc->highest_tsn_inside_map?
6827                  */
6828                 asoc->last_revoke_count = cnt;
6829                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6830                 /* sa_ignore NO_NULL_CHK */
6831                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6832                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6833         }
6834         /*
6835          * Another issue, in un-setting the TSN's in the mapping array we
6836          * DID NOT adjust the highest_tsn marker.  This will cause one of
6837          * two things to occur. It may cause us to do extra work in checking
6838          * for our mapping array movement. More importantly it may cause us
6839          * to SACK every datagram. This may not be a bad thing though since
6840          * we will recover once we get our cum-ack above and all this stuff
6841          * we dumped recovered.
6842          */
6843 }
6844
6845 void
6846 sctp_drain()
6847 {
6848         /*
6849          * We must walk the PCB lists for ALL associations here. The system
6850          * is LOW on MBUF's and needs help. This is where reneging will
6851          * occur. We really hope this does NOT happen!
6852          */
6853         VNET_ITERATOR_DECL(vnet_iter);
6854         VNET_LIST_RLOCK_NOSLEEP();
6855         VNET_FOREACH(vnet_iter) {
6856                 CURVNET_SET(vnet_iter);
6857                 struct sctp_inpcb *inp;
6858                 struct sctp_tcb *stcb;
6859
6860                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6861                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6862 #ifdef VIMAGE
6863                         continue;
6864 #else
6865                         return;
6866 #endif
6867                 }
6868                 SCTP_INP_INFO_RLOCK();
6869                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6870                         /* For each endpoint */
6871                         SCTP_INP_RLOCK(inp);
6872                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6873                                 /* For each association */
6874                                 SCTP_TCB_LOCK(stcb);
6875                                 sctp_drain_mbufs(stcb);
6876                                 SCTP_TCB_UNLOCK(stcb);
6877                         }
6878                         SCTP_INP_RUNLOCK(inp);
6879                 }
6880                 SCTP_INP_INFO_RUNLOCK();
6881                 CURVNET_RESTORE();
6882         }
6883         VNET_LIST_RUNLOCK_NOSLEEP();
6884 }
6885
6886 /*
6887  * start a new iterator
6888  * iterates through all endpoints and associations based on the pcb_state
6889  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6890  * assocs and "ef" (optional) is executed when the iterator completes.
6891  * "inpf" (optional) is executed for each new endpoint as it is being
6892  * iterated through. inpe (optional) is called when the inp completes
6893  * its way through all the stcbs.
6894  */
6895 int
6896 sctp_initiate_iterator(inp_func inpf,
6897     asoc_func af,
6898     inp_func inpe,
6899     uint32_t pcb_state,
6900     uint32_t pcb_features,
6901     uint32_t asoc_state,
6902     void *argp,
6903     uint32_t argi,
6904     end_func ef,
6905     struct sctp_inpcb *s_inp,
6906     uint8_t chunk_output_off)
6907 {
6908         struct sctp_iterator *it = NULL;
6909
6910         if (af == NULL) {
6911                 return (-1);
6912         }
6913         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6914             SCTP_M_ITER);
6915         if (it == NULL) {
6916                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6917                 return (ENOMEM);
6918         }
6919         memset(it, 0, sizeof(*it));
6920         it->function_assoc = af;
6921         it->function_inp = inpf;
6922         if (inpf)
6923                 it->done_current_ep = 0;
6924         else
6925                 it->done_current_ep = 1;
6926         it->function_atend = ef;
6927         it->pointer = argp;
6928         it->val = argi;
6929         it->pcb_flags = pcb_state;
6930         it->pcb_features = pcb_features;
6931         it->asoc_state = asoc_state;
6932         it->function_inp_end = inpe;
6933         it->no_chunk_output = chunk_output_off;
6934         it->vn = curvnet;
6935         if (s_inp) {
6936                 /* Assume lock is held here */
6937                 it->inp = s_inp;
6938                 SCTP_INP_INCR_REF(it->inp);
6939                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
6940         } else {
6941                 SCTP_INP_INFO_RLOCK();
6942                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
6943                 if (it->inp) {
6944                         SCTP_INP_INCR_REF(it->inp);
6945                 }
6946                 SCTP_INP_INFO_RUNLOCK();
6947                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
6948
6949         }
6950         SCTP_IPI_ITERATOR_WQ_LOCK();
6951
6952         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
6953         if (sctp_it_ctl.iterator_running == 0) {
6954                 sctp_wakeup_iterator();
6955         }
6956         SCTP_IPI_ITERATOR_WQ_UNLOCK();
6957         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
6958         return (0);
6959 }