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
  98         SCTP_INP_INFO_RUNLOCK();
  99 }
 100
 101 /*
 102  * Addresses are added to VRF's (Virtual Router's). For BSD we
 103  * have only the default VRF 0. We maintain a hash list of
 104  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
 105  * these has a list of addresses. When we add a new address
 106  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 107  * not exist we create it and add it to the list of IFN's
 108  * within the VRF. Once we have the sctp_ifn, we add the
 109  * address to the list. So we look something like:
 110  *
 111  * hash-vrf-table
 112  *   vrf-> ifn-> ifn -> ifn
 113  *   vrf    |
 114  *    ...   +--ifa-> ifa -> ifa
 115  *   vrf
 116  *
 117  * We keep these separate lists since the SCTP subsystem will
 118  * point to these from its source address selection nets structure.
 119  * When an address is deleted it does not happen right away on
 120  * the SCTP side, it gets scheduled. What we do when a
 121  * delete happens is immediately remove the address from
 122  * the master list and decrement the refcount. As our
 123  * addip iterator works through and frees the src address
 124  * selection pointing to the sctp_ifa, eventually the refcount
 125  * will reach 0 and we will delete it. Note that it is assumed
 126  * that any locking on system level ifn/ifa is done at the
 127  * caller of these functions and these routines will only
 128  * lock the SCTP structures as they add or delete things.
 129  *
 130  * Other notes on VRF concepts.
 131  *  - An endpoint can be in multiple VRF's
 132  *  - An association lives within a VRF and only one VRF.
 133  *  - Any incoming packet we can deduce the VRF for by
 134  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 135  *  - Any downward send call or connect call must supply the
 136  *    VRF via ancillary data or via some sort of set default
 137  *    VRF socket option call (again for BSD no brainer since
 138  *    the VRF is always 0).
 139  *  - An endpoint may add multiple VRF's to it.
 140  *  - Listening sockets can accept associations in any
 141  *    of the VRF's they are in but the assoc will end up
 142  *    in only one VRF (gotten from the packet or connect/send).
 143  *
 144  */
 145
 146 struct sctp_vrf *
 147 sctp_allocate_vrf(int vrf_id)
 148 {
 149         struct sctp_vrf *vrf = NULL;
 150         struct sctp_vrflist *bucket;
 151
 152         /* First allocate the VRF structure */
 153         vrf = sctp_find_vrf(vrf_id);
 154         if (vrf) {
 155                 /* Already allocated */
 156                 return (vrf);
 157         }
 158         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 159             SCTP_M_VRF);
 160         if (vrf == NULL) {
 161                 /* No memory */
 162 #ifdef INVARIANTS
 163                 panic("No memory for VRF:%d", vrf_id);
 164 #endif
 165                 return (NULL);
 166         }
 167         /* setup the VRF */
 168         memset(vrf, 0, sizeof(struct sctp_vrf));
 169         vrf->vrf_id = vrf_id;
 170         LIST_INIT(&vrf->ifnlist);
 171         vrf->total_ifa_count = 0;
 172         vrf->refcount = 0;
 173         /* now also setup table ids */
 174         SCTP_INIT_VRF_TABLEID(vrf);
 175         /* Init the HASH of addresses */
 176         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 177             &vrf->vrf_addr_hashmark);
 178         if (vrf->vrf_addr_hash == NULL) {
 179                 /* No memory */
 180 #ifdef INVARIANTS
 181                 panic("No memory for VRF:%d", vrf_id);
 182 #endif
 183                 SCTP_FREE(vrf, SCTP_M_VRF);
 184                 return (NULL);
 185         }
 186         /* Add it to the hash table */
 187         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 188         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 189         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 190         return (vrf);
 191 }
 192
 193
 194 struct sctp_ifn *
 195 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 196 {
 197         struct sctp_ifn *sctp_ifnp;
 198         struct sctp_ifnlist *hash_ifn_head;
 199
 200         /*
 201          * We assume the lock is held for the addresses if that's wrong
 202          * problems could occur :-)
 203          */
 204         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 205         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 206                 if (sctp_ifnp->ifn_index == ifn_index) {
 207                         return (sctp_ifnp);
 208                 }
 209                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 210                         return (sctp_ifnp);
 211                 }
 212         }
 213         return (NULL);
 214 }
 215
 216
 217
 218 struct sctp_vrf *
 219 sctp_find_vrf(uint32_t vrf_id)
 220 {
 221         struct sctp_vrflist *bucket;
 222         struct sctp_vrf *liste;
 223
 224         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 225         LIST_FOREACH(liste, bucket, next_vrf) {
 226                 if (vrf_id == liste->vrf_id) {
 227                         return (liste);
 228                 }
 229         }
 230         return (NULL);
 231 }
 232
 233 void
 234 sctp_free_vrf(struct sctp_vrf *vrf)
 235 {
 236         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 237                 if (vrf->vrf_addr_hash) {
 238                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 239                         vrf->vrf_addr_hash = NULL;
 240                 }
 241                 /* We zero'd the count */
 242                 LIST_REMOVE(vrf, next_vrf);
 243                 SCTP_FREE(vrf, SCTP_M_VRF);
 244                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 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 void
 262 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 263 {
 264         struct sctp_ifn *sctp_ifnp;
 265
 266         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 267         if (sctp_ifnp != NULL) {
 268                 sctp_ifnp->ifn_mtu = mtu;
 269         }
 270 }
 271
 272
 273 void
 274 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 275 {
 276         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 277                 /* We zero'd the count */
 278                 if (sctp_ifap->ifn_p) {
 279                         sctp_free_ifn(sctp_ifap->ifn_p);
 280                 }
 281                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 282                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 283         }
 284 }
 285
 286 static void
 287 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 288 {
 289         struct sctp_ifn *found;
 290
 291         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 292         if (found == NULL) {
 293                 /* Not in the list.. sorry */
 294                 return;
 295         }
 296         if (hold_addr_lock == 0)
 297                 SCTP_IPI_ADDR_WLOCK();
 298         LIST_REMOVE(sctp_ifnp, next_bucket);
 299         LIST_REMOVE(sctp_ifnp, next_ifn);
 300         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 301             sctp_ifnp->registered_af);
 302         if (hold_addr_lock == 0)
 303                 SCTP_IPI_ADDR_WUNLOCK();
 304         /* Take away the reference, and possibly free it */
 305         sctp_free_ifn(sctp_ifnp);
 306 }
 307
 308 void
 309 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 310     const char *if_name, uint32_t ifn_index)
 311 {
 312         struct sctp_vrf *vrf;
 313         struct sctp_ifa *sctp_ifap = NULL;
 314
 315         SCTP_IPI_ADDR_RLOCK();
 316         vrf = sctp_find_vrf(vrf_id);
 317         if (vrf == NULL) {
 318                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 319                 goto out;
 320
 321         }
 322         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 323         if (sctp_ifap == NULL) {
 324                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 325                 goto out;
 326         }
 327         if (sctp_ifap->ifn_p == NULL) {
 328                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 329                 goto out;
 330         }
 331         if (if_name) {
 332                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 333                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 334                             sctp_ifap->ifn_p->ifn_name, if_name);
 335                         goto out;
 336                 }
 337         } else {
 338                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 339                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 340                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 341                         goto out;
 342                 }
 343         }
 344
 345         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 346         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 347 out:
 348         SCTP_IPI_ADDR_RUNLOCK();
 349 }
 350
 351 void
 352 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 353     const char *if_name, uint32_t ifn_index)
 354 {
 355         struct sctp_vrf *vrf;
 356         struct sctp_ifa *sctp_ifap = NULL;
 357
 358         SCTP_IPI_ADDR_RLOCK();
 359         vrf = sctp_find_vrf(vrf_id);
 360         if (vrf == NULL) {
 361                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 362                 goto out;
 363
 364         }
 365         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 366         if (sctp_ifap == NULL) {
 367                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 368                 goto out;
 369         }
 370         if (sctp_ifap->ifn_p == NULL) {
 371                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 372                 goto out;
 373         }
 374         if (if_name) {
 375                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 376                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 377                             sctp_ifap->ifn_p->ifn_name, if_name);
 378                         goto out;
 379                 }
 380         } else {
 381                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 382                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 383                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 384                         goto out;
 385                 }
 386         }
 387
 388         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 389         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 390 out:
 391         SCTP_IPI_ADDR_RUNLOCK();
 392 }
 393
 394 /*-
 395  * Add an ifa to an ifn.
 396  * Register the interface as necessary.
 397  * NOTE: ADDR write lock MUST be held.
 398  */
 399 static void
 400 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 401 {
 402         int ifa_af;
 403
 404         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 405         sctp_ifap->ifn_p = sctp_ifnp;
 406         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 407         /* update address counts */
 408         sctp_ifnp->ifa_count++;
 409         ifa_af = sctp_ifap->address.sa.sa_family;
 410         switch (ifa_af) {
 411 #ifdef INET
 412         case AF_INET:
 413                 sctp_ifnp->num_v4++;
 414                 break;
 415 #endif
 416 #ifdef INET6
 417         case AF_INET6:
 418                 sctp_ifnp->num_v6++;
 419                 break;
 420 #endif
 421         default:
 422                 break;
 423         }
 424         if (sctp_ifnp->ifa_count == 1) {
 425                 /* register the new interface */
 426                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 427                 sctp_ifnp->registered_af = ifa_af;
 428         }
 429 }
 430
 431 /*-
 432  * Remove an ifa from its ifn.
 433  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 434  * the interface based on the remaining address families left.
 435  * NOTE: ADDR write lock MUST be held.
 436  */
 437 static void
 438 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 439 {
 440         LIST_REMOVE(sctp_ifap, next_ifa);
 441         if (sctp_ifap->ifn_p) {
 442                 /* update address counts */
 443                 sctp_ifap->ifn_p->ifa_count--;
 444                 switch (sctp_ifap->address.sa.sa_family) {
 445 #ifdef INET
 446                 case AF_INET:
 447                         sctp_ifap->ifn_p->num_v4--;
 448                         break;
 449 #endif
 450 #ifdef INET6
 451                 case AF_INET6:
 452                         sctp_ifap->ifn_p->num_v6--;
 453                         break;
 454 #endif
 455                 default:
 456                         break;
 457                 }
 458
 459                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 460                         /* remove the ifn, possibly freeing it */
 461                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 462                 } else {
 463                         /* re-register address family type, if needed */
 464                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 465                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 466                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 467                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 468                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 469                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 470                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 471                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 472                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 473                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 474                         }
 475                         /* free the ifn refcount */
 476                         sctp_free_ifn(sctp_ifap->ifn_p);
 477                 }
 478                 sctp_ifap->ifn_p = NULL;
 479         }
 480 }
 481
 482 struct sctp_ifa *
 483 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 484     uint32_t ifn_type, const char *if_name, void *ifa,
 485     struct sockaddr *addr, uint32_t ifa_flags,
 486     int dynamic_add)
 487 {
 488         struct sctp_vrf *vrf;
 489         struct sctp_ifn *sctp_ifnp = NULL;
 490         struct sctp_ifa *sctp_ifap = NULL;
 491         struct sctp_ifalist *hash_addr_head;
 492         struct sctp_ifnlist *hash_ifn_head;
 493         uint32_t hash_of_addr;
 494         int new_ifn_af = 0;
 495
 496 #ifdef SCTP_DEBUG
 497         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 498         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 499 #endif
 500         SCTP_IPI_ADDR_WLOCK();
 501         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 502         if (sctp_ifnp) {
 503                 vrf = sctp_ifnp->vrf;
 504         } else {
 505                 vrf = sctp_find_vrf(vrf_id);
 506                 if (vrf == NULL) {
 507                         vrf = sctp_allocate_vrf(vrf_id);
 508                         if (vrf == NULL) {
 509                                 SCTP_IPI_ADDR_WUNLOCK();
 510                                 return (NULL);
 511                         }
 512                 }
 513         }
 514         if (sctp_ifnp == NULL) {
 515                 /*
 516                  * build one and add it, can't hold lock until after malloc
 517                  * done though.
 518                  */
 519                 SCTP_IPI_ADDR_WUNLOCK();
 520                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 521                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 522                 if (sctp_ifnp == NULL) {
 523 #ifdef INVARIANTS
 524                         panic("No memory for IFN");
 525 #endif
 526                         return (NULL);
 527                 }
 528                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 529                 sctp_ifnp->ifn_index = ifn_index;
 530                 sctp_ifnp->ifn_p = ifn;
 531                 sctp_ifnp->ifn_type = ifn_type;
 532                 sctp_ifnp->refcount = 0;
 533                 sctp_ifnp->vrf = vrf;
 534                 atomic_add_int(&vrf->refcount, 1);
 535                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 536                 if (if_name != NULL) {
 537                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
 538                 } else {
 539                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
 540                 }
 541                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 542                 LIST_INIT(&sctp_ifnp->ifalist);
 543                 SCTP_IPI_ADDR_WLOCK();
 544                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 545                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 546                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 547                 new_ifn_af = 1;
 548         }
 549         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 550         if (sctp_ifap) {
 551                 /* Hmm, it already exists? */
 552                 if ((sctp_ifap->ifn_p) &&
 553                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 554                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 555                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 556                             (void *)sctp_ifap);
 557                         if (new_ifn_af) {
 558                                 /* Remove the created one that we don't want */
 559                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 560                         }
 561                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 562                                 /* easy to solve, just switch back to active */
 563                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 564                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 565                                 sctp_ifap->ifn_p = sctp_ifnp;
 566                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 567                         }
 568         exit_stage_left:
 569                         SCTP_IPI_ADDR_WUNLOCK();
 570                         return (sctp_ifap);
 571                 } else {
 572                         if (sctp_ifap->ifn_p) {
 573                                 /*
 574                                  * The last IFN gets the address, remove the
 575                                  * old one
 576                                  */
 577                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 578                                     (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 579                                     sctp_ifap->ifn_p->ifn_index, if_name,
 580                                     ifn_index);
 581                                 /* remove the address from the old ifn */
 582                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 583                                 /* move the address over to the new ifn */
 584                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 585                                 goto exit_stage_left;
 586                         } else {
 587                                 /* repair ifnp which was NULL ? */
 588                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 589                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 590                                     (void *)sctp_ifnp, (void *)sctp_ifap);
 591                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 592                         }
 593                         goto exit_stage_left;
 594                 }
 595         }
 596         SCTP_IPI_ADDR_WUNLOCK();
 597         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 598         if (sctp_ifap == NULL) {
 599 #ifdef INVARIANTS
 600                 panic("No memory for IFA");
 601 #endif
 602                 return (NULL);
 603         }
 604         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 605         sctp_ifap->ifn_p = sctp_ifnp;
 606         atomic_add_int(&sctp_ifnp->refcount, 1);
 607         sctp_ifap->vrf_id = vrf_id;
 608         sctp_ifap->ifa = ifa;
 609         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 610         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 611         sctp_ifap->flags = ifa_flags;
 612         /* Set scope */
 613         switch (sctp_ifap->address.sa.sa_family) {
 614 #ifdef INET
 615         case AF_INET:
 616                 {
 617                         struct sockaddr_in *sin;
 618
 619                         sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
 620                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 621                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 622                                 sctp_ifap->src_is_loop = 1;
 623                         }
 624                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 625                                 sctp_ifap->src_is_priv = 1;
 626                         }
 627                         sctp_ifnp->num_v4++;
 628                         if (new_ifn_af)
 629                                 new_ifn_af = AF_INET;
 630                         break;
 631                 }
 632 #endif
 633 #ifdef INET6
 634         case AF_INET6:
 635                 {
 636                         /* ok to use deprecated addresses? */
 637                         struct sockaddr_in6 *sin6;
 638
 639                         sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
 640                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 641                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 642                                 sctp_ifap->src_is_loop = 1;
 643                         }
 644                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 645                                 sctp_ifap->src_is_priv = 1;
 646                         }
 647                         sctp_ifnp->num_v6++;
 648                         if (new_ifn_af)
 649                                 new_ifn_af = AF_INET6;
 650                         break;
 651                 }
 652 #endif
 653         default:
 654                 new_ifn_af = 0;
 655                 break;
 656         }
 657         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 658
 659         if ((sctp_ifap->src_is_priv == 0) &&
 660             (sctp_ifap->src_is_loop == 0)) {
 661                 sctp_ifap->src_is_glob = 1;
 662         }
 663         SCTP_IPI_ADDR_WLOCK();
 664         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 665         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 666         sctp_ifap->refcount = 1;
 667         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 668         sctp_ifnp->ifa_count++;
 669         vrf->total_ifa_count++;
 670         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 671         if (new_ifn_af) {
 672                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 673                 sctp_ifnp->registered_af = new_ifn_af;
 674         }
 675         SCTP_IPI_ADDR_WUNLOCK();
 676         if (dynamic_add) {
 677                 /*
 678                  * Bump up the refcount so that when the timer completes it
 679                  * will drop back down.
 680                  */
 681                 struct sctp_laddr *wi;
 682
 683                 atomic_add_int(&sctp_ifap->refcount, 1);
 684                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 685                 if (wi == NULL) {
 686                         /*
 687                          * Gak, what can we do? We have lost an address
 688                          * change can you say HOSED?
 689                          */
 690                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 691                         /* Opps, must decrement the count */
 692                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 693                             if_name);
 694                         return (NULL);
 695                 }
 696                 SCTP_INCR_LADDR_COUNT();
 697                 bzero(wi, sizeof(*wi));
 698                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 699                 wi->ifa = sctp_ifap;
 700                 wi->action = SCTP_ADD_IP_ADDRESS;
 701
 702                 SCTP_WQ_ADDR_LOCK();
 703                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 704                 SCTP_WQ_ADDR_UNLOCK();
 705
 706                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 707                     (struct sctp_inpcb *)NULL,
 708                     (struct sctp_tcb *)NULL,
 709                     (struct sctp_nets *)NULL);
 710         } else {
 711                 /* it's ready for use */
 712                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 713         }
 714         return (sctp_ifap);
 715 }
 716
 717 void
 718 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 719     uint32_t ifn_index, const char *if_name)
 720 {
 721         struct sctp_vrf *vrf;
 722         struct sctp_ifa *sctp_ifap = NULL;
 723
 724         SCTP_IPI_ADDR_WLOCK();
 725         vrf = sctp_find_vrf(vrf_id);
 726         if (vrf == NULL) {
 727                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 728                 goto out_now;
 729         }
 730 #ifdef SCTP_DEBUG
 731         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 732         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 733 #endif
 734         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 735         if (sctp_ifap) {
 736                 /* Validate the delete */
 737                 if (sctp_ifap->ifn_p) {
 738                         int valid = 0;
 739
 740                         /*-
 741                          * The name has priority over the ifn_index
 742                          * if its given. We do this especially for
 743                          * panda who might recycle indexes fast.
 744                          */
 745                         if (if_name) {
 746                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 747                                         /* They match its a correct delete */
 748                                         valid = 1;
 749                                 }
 750                         }
 751                         if (!valid) {
 752                                 /* last ditch check ifn_index */
 753                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 754                                         valid = 1;
 755                                 }
 756                         }
 757                         if (!valid) {
 758                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 759                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 760                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 761                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 762                                 SCTP_IPI_ADDR_WUNLOCK();
 763                                 return;
 764                         }
 765                 }
 766                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
 767                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 768                 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
 769                 vrf->total_ifa_count--;
 770                 LIST_REMOVE(sctp_ifap, next_bucket);
 771                 sctp_remove_ifa_from_ifn(sctp_ifap);
 772         }
 773 #ifdef SCTP_DEBUG
 774         else {
 775                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 776                     ifn_index);
 777                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 778         }
 779 #endif
 780
 781 out_now:
 782         SCTP_IPI_ADDR_WUNLOCK();
 783         if (sctp_ifap) {
 784                 struct sctp_laddr *wi;
 785
 786                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 787                 if (wi == NULL) {
 788                         /*
 789                          * Gak, what can we do? We have lost an address
 790                          * change can you say HOSED?
 791                          */
 792                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 793
 794                         /* Oops, must decrement the count */
 795                         sctp_free_ifa(sctp_ifap);
 796                         return;
 797                 }
 798                 SCTP_INCR_LADDR_COUNT();
 799                 bzero(wi, sizeof(*wi));
 800                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 801                 wi->ifa = sctp_ifap;
 802                 wi->action = SCTP_DEL_IP_ADDRESS;
 803                 SCTP_WQ_ADDR_LOCK();
 804                 /*
 805                  * Should this really be a tailq? As it is we will process
 806                  * the newest first :-0
 807                  */
 808                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 809                 SCTP_WQ_ADDR_UNLOCK();
 810
 811                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 812                     (struct sctp_inpcb *)NULL,
 813                     (struct sctp_tcb *)NULL,
 814                     (struct sctp_nets *)NULL);
 815         }
 816         return;
 817 }
 818
 819
 820 static struct sctp_tcb *
 821 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 822     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
 823 {
 824         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
 825         /*
 826          * If we support the TCP model, then we must now dig through to see
 827          * if we can find our endpoint in the list of tcp ep's.
 828          */
 829         uint16_t lport, rport;
 830         struct sctppcbhead *ephead;
 831         struct sctp_inpcb *inp;
 832         struct sctp_laddr *laddr;
 833         struct sctp_tcb *stcb;
 834         struct sctp_nets *net;
 835
 836         if ((to == NULL) || (from == NULL)) {
 837                 return (NULL);
 838         }
 839         switch (to->sa_family) {
 840 #ifdef INET
 841         case AF_INET:
 842                 if (from->sa_family == AF_INET) {
 843                         lport = ((struct sockaddr_in *)to)->sin_port;
 844                         rport = ((struct sockaddr_in *)from)->sin_port;
 845                 } else {
 846                         return (NULL);
 847                 }
 848                 break;
 849 #endif
 850 #ifdef INET6
 851         case AF_INET6:
 852                 if (from->sa_family == AF_INET6) {
 853                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
 854                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
 855                 } else {
 856                         return (NULL);
 857                 }
 858                 break;
 859 #endif
 860         default:
 861                 return (NULL);
 862         }
 863         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
 864         /*
 865          * Ok now for each of the guys in this bucket we must look and see:
 866          * - Does the remote port match. - Does there single association's
 867          * addresses match this address (to). If so we update p_ep to point
 868          * to this ep and return the tcb from it.
 869          */
 870         LIST_FOREACH(inp, ephead, sctp_hash) {
 871                 SCTP_INP_RLOCK(inp);
 872                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 873                         SCTP_INP_RUNLOCK(inp);
 874                         continue;
 875                 }
 876                 if (lport != inp->sctp_lport) {
 877                         SCTP_INP_RUNLOCK(inp);
 878                         continue;
 879                 }
 880                 if (inp->def_vrf_id != vrf_id) {
 881                         SCTP_INP_RUNLOCK(inp);
 882                         continue;
 883                 }
 884                 /* check to see if the ep has one of the addresses */
 885                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 886                         /* We are NOT bound all, so look further */
 887                         int match = 0;
 888
 889                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 890
 891                                 if (laddr->ifa == NULL) {
 892                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
 893                                         continue;
 894                                 }
 895                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 896                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 897                                         continue;
 898                                 }
 899                                 if (laddr->ifa->address.sa.sa_family ==
 900                                     to->sa_family) {
 901                                         /* see if it matches */
 902
 903 #ifdef INET
 904                                         if (from->sa_family == AF_INET) {
 905                                                 struct sockaddr_in *intf_addr,
 906                                                            *sin;
 907
 908                                                 intf_addr = &laddr->ifa->address.sin;
 909                                                 sin = (struct sockaddr_in *)to;
 910                                                 if (sin->sin_addr.s_addr ==
 911                                                     intf_addr->sin_addr.s_addr) {
 912                                                         match = 1;
 913                                                         break;
 914                                                 }
 915                                         }
 916 #endif
 917 #ifdef INET6
 918                                         if (from->sa_family == AF_INET6) {
 919                                                 struct sockaddr_in6 *intf_addr6;
 920                                                 struct sockaddr_in6 *sin6;
 921
 922                                                 sin6 = (struct sockaddr_in6 *)
 923                                                     to;
 924                                                 intf_addr6 = &laddr->ifa->address.sin6;
 925
 926                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
 927                                                     intf_addr6)) {
 928                                                         match = 1;
 929                                                         break;
 930                                                 }
 931                                         }
 932 #endif
 933                                 }
 934                         }
 935                         if (match == 0) {
 936                                 /* This endpoint does not have this address */
 937                                 SCTP_INP_RUNLOCK(inp);
 938                                 continue;
 939                         }
 940                 }
 941                 /*
 942                  * Ok if we hit here the ep has the address, does it hold
 943                  * the tcb?
 944                  */
 945
 946                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 947                 if (stcb == NULL) {
 948                         SCTP_INP_RUNLOCK(inp);
 949                         continue;
 950                 }
 951                 SCTP_TCB_LOCK(stcb);
 952                 if (stcb->rport != rport) {
 953                         /* remote port does not match. */
 954                         SCTP_TCB_UNLOCK(stcb);
 955                         SCTP_INP_RUNLOCK(inp);
 956                         continue;
 957                 }
 958                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 959                         SCTP_TCB_UNLOCK(stcb);
 960                         SCTP_INP_RUNLOCK(inp);
 961                         continue;
 962                 }
 963                 /* Does this TCB have a matching address? */
 964                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 965
 966                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
 967                                 /* not the same family, can't be a match */
 968                                 continue;
 969                         }
 970                         switch (from->sa_family) {
 971 #ifdef INET
 972                         case AF_INET:
 973                                 {
 974                                         struct sockaddr_in *sin, *rsin;
 975
 976                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
 977                                         rsin = (struct sockaddr_in *)from;
 978                                         if (sin->sin_addr.s_addr ==
 979                                             rsin->sin_addr.s_addr) {
 980                                                 /* found it */
 981                                                 if (netp != NULL) {
 982                                                         *netp = net;
 983                                                 }
 984                                                 /*
 985                                                  * Update the endpoint
 986                                                  * pointer
 987                                                  */
 988                                                 *inp_p = inp;
 989                                                 SCTP_INP_RUNLOCK(inp);
 990                                                 return (stcb);
 991                                         }
 992                                         break;
 993                                 }
 994 #endif
 995 #ifdef INET6
 996                         case AF_INET6:
 997                                 {
 998                                         struct sockaddr_in6 *sin6, *rsin6;
 999
1000                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1001                                         rsin6 = (struct sockaddr_in6 *)from;
1002                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1003                                             rsin6)) {
1004                                                 /* found it */
1005                                                 if (netp != NULL) {
1006                                                         *netp = net;
1007                                                 }
1008                                                 /*
1009                                                  * Update the endpoint
1010                                                  * pointer
1011                                                  */
1012                                                 *inp_p = inp;
1013                                                 SCTP_INP_RUNLOCK(inp);
1014                                                 return (stcb);
1015                                         }
1016                                         break;
1017                                 }
1018 #endif
1019                         default:
1020                                 /* TSNH */
1021                                 break;
1022                         }
1023                 }
1024                 SCTP_TCB_UNLOCK(stcb);
1025                 SCTP_INP_RUNLOCK(inp);
1026         }
1027         return (NULL);
1028 }
1029
1030 static int
1031 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
1032 {
1033         int loopback_scope, ipv4_local_scope, local_scope, site_scope;
1034         int ipv4_addr_legal, ipv6_addr_legal;
1035         struct sctp_vrf *vrf;
1036         struct sctp_ifn *sctp_ifn;
1037         struct sctp_ifa *sctp_ifa;
1038
1039         loopback_scope = stcb->asoc.loopback_scope;
1040         ipv4_local_scope = stcb->asoc.ipv4_local_scope;
1041         local_scope = stcb->asoc.local_scope;
1042         site_scope = stcb->asoc.site_scope;
1043         ipv4_addr_legal = ipv6_addr_legal = 0;
1044         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1045                 ipv6_addr_legal = 1;
1046                 if (SCTP_IPV6_V6ONLY(stcb->sctp_ep) == 0) {
1047                         ipv4_addr_legal = 1;
1048                 }
1049         } else {
1050                 ipv4_addr_legal = 1;
1051         }
1052
1053         SCTP_IPI_ADDR_RLOCK();
1054         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
1055         if (vrf == NULL) {
1056                 /* no vrf, no addresses */
1057                 SCTP_IPI_ADDR_RUNLOCK();
1058                 return (0);
1059         }
1060         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
1061                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
1062                         if ((loopback_scope == 0) &&
1063                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
1064                                 continue;
1065                         }
1066                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
1067                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
1068                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
1069                                         /*
1070                                          * We allow pending addresses, where
1071                                          * we have sent an asconf-add to be
1072                                          * considered valid.
1073                                          */
1074                                         continue;
1075                                 }
1076                                 switch (sctp_ifa->address.sa.sa_family) {
1077 #ifdef INET
1078                                 case AF_INET:
1079                                         if (ipv4_addr_legal) {
1080                                                 struct sockaddr_in *sin,
1081                                                            *rsin;
1082
1083                                                 sin = &sctp_ifa->address.sin;
1084                                                 rsin = (struct sockaddr_in *)to;
1085                                                 if ((ipv4_local_scope == 0) &&
1086                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
1087                                                         continue;
1088                                                 }
1089                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1090                                                         SCTP_IPI_ADDR_RUNLOCK();
1091                                                         return (1);
1092                                                 }
1093                                         }
1094                                         break;
1095 #endif
1096 #ifdef INET6
1097                                 case AF_INET6:
1098                                         if (ipv6_addr_legal) {
1099                                                 struct sockaddr_in6 *sin6,
1100                                                             *rsin6;
1101
1102                                                 sin6 = &sctp_ifa->address.sin6;
1103                                                 rsin6 = (struct sockaddr_in6 *)to;
1104                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1105                                                         if (local_scope == 0)
1106                                                                 continue;
1107                                                         if (sin6->sin6_scope_id == 0) {
1108                                                                 if (sa6_recoverscope(sin6) != 0)
1109                                                                         continue;
1110                                                         }
1111                                                 }
1112                                                 if ((site_scope == 0) &&
1113                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1114                                                         continue;
1115                                                 }
1116                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1117                                                         SCTP_IPI_ADDR_RUNLOCK();
1118                                                         return (1);
1119                                                 }
1120                                         }
1121                                         break;
1122 #endif
1123                                 default:
1124                                         /* TSNH */
1125                                         break;
1126                                 }
1127                         }
1128                 }
1129         } else {
1130                 struct sctp_laddr *laddr;
1131
1132                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
1133                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
1134                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
1135                                 /*
1136                                  * We allow pending addresses, where we have
1137                                  * sent an asconf-add to be considered
1138                                  * valid.
1139                                  */
1140                                 continue;
1141                         }
1142                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
1143                                 continue;
1144                         }
1145                         switch (to->sa_family) {
1146 #ifdef INET
1147                         case AF_INET:
1148                                 {
1149                                         struct sockaddr_in *sin, *rsin;
1150
1151                                         sin = (struct sockaddr_in *)&laddr->ifa->address.sin;
1152                                         rsin = (struct sockaddr_in *)to;
1153                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1154                                                 SCTP_IPI_ADDR_RUNLOCK();
1155                                                 return (1);
1156                                         }
1157                                         break;
1158                                 }
1159 #endif
1160 #ifdef INET6
1161                         case AF_INET6:
1162                                 {
1163                                         struct sockaddr_in6 *sin6, *rsin6;
1164
1165                                         sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6;
1166                                         rsin6 = (struct sockaddr_in6 *)to;
1167                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1168                                                 SCTP_IPI_ADDR_RUNLOCK();
1169                                                 return (1);
1170                                         }
1171                                         break;
1172                                 }
1173
1174 #endif
1175                         default:
1176                                 /* TSNH */
1177                                 break;
1178                         }
1179
1180                 }
1181         }
1182         SCTP_IPI_ADDR_RUNLOCK();
1183         return (0);
1184 }
1185
1186 /*
1187  * rules for use
1188  *
1189  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1190  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1191  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1192  * NULL.
1193  */
1194
1195 struct sctp_tcb *
1196 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1197     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1198 {
1199         struct sctpasochead *head;
1200         struct sctp_inpcb *inp;
1201         struct sctp_tcb *stcb = NULL;
1202         struct sctp_nets *net;
1203         uint16_t rport;
1204
1205         inp = *inp_p;
1206         switch (remote->sa_family) {
1207 #ifdef INET
1208         case AF_INET:
1209                 rport = (((struct sockaddr_in *)remote)->sin_port);
1210                 break;
1211 #endif
1212 #ifdef INET6
1213         case AF_INET6:
1214                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1215                 break;
1216 #endif
1217         default:
1218                 return (NULL);
1219         }
1220         if (locked_tcb) {
1221                 /*
1222                  * UN-lock so we can do proper locking here this occurs when
1223                  * called from load_addresses_from_init.
1224                  */
1225                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1226                 SCTP_TCB_UNLOCK(locked_tcb);
1227         }
1228         SCTP_INP_INFO_RLOCK();
1229         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
1230                 /*-
1231                  * Now either this guy is our listener or it's the
1232                  * connector. If it is the one that issued the connect, then
1233                  * it's only chance is to be the first TCB in the list. If
1234                  * it is the acceptor, then do the special_lookup to hash
1235                  * and find the real inp.
1236                  */
1237                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1238                         /* to is peer addr, from is my addr */
1239                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1240                             netp, inp->def_vrf_id);
1241                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1242                                 /* we have a locked tcb, lower refcount */
1243                                 SCTP_INP_DECR_REF(inp);
1244                         }
1245                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1246                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1247                                 SCTP_TCB_LOCK(locked_tcb);
1248                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1249                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1250                         }
1251                         SCTP_INP_INFO_RUNLOCK();
1252                         return (stcb);
1253                 } else {
1254                         SCTP_INP_WLOCK(inp);
1255                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1256                                 goto null_return;
1257                         }
1258                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1259                         if (stcb == NULL) {
1260                                 goto null_return;
1261                         }
1262                         SCTP_TCB_LOCK(stcb);
1263
1264                         if (stcb->rport != rport) {
1265                                 /* remote port does not match. */
1266                                 SCTP_TCB_UNLOCK(stcb);
1267                                 goto null_return;
1268                         }
1269                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1270                                 SCTP_TCB_UNLOCK(stcb);
1271                                 goto null_return;
1272                         }
1273                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1274                                 SCTP_TCB_UNLOCK(stcb);
1275                                 goto null_return;
1276                         }
1277                         /* now look at the list of remote addresses */
1278                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1279 #ifdef INVARIANTS
1280                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1281                                         panic("Corrupt net list");
1282                                 }
1283 #endif
1284                                 if (net->ro._l_addr.sa.sa_family !=
1285                                     remote->sa_family) {
1286                                         /* not the same family */
1287                                         continue;
1288                                 }
1289                                 switch (remote->sa_family) {
1290 #ifdef INET
1291                                 case AF_INET:
1292                                         {
1293                                                 struct sockaddr_in *sin,
1294                                                            *rsin;
1295
1296                                                 sin = (struct sockaddr_in *)
1297                                                     &net->ro._l_addr;
1298                                                 rsin = (struct sockaddr_in *)remote;
1299                                                 if (sin->sin_addr.s_addr ==
1300                                                     rsin->sin_addr.s_addr) {
1301                                                         /* found it */
1302                                                         if (netp != NULL) {
1303                                                                 *netp = net;
1304                                                         }
1305                                                         if (locked_tcb == NULL) {
1306                                                                 SCTP_INP_DECR_REF(inp);
1307                                                         } else if (locked_tcb != stcb) {
1308                                                                 SCTP_TCB_LOCK(locked_tcb);
1309                                                         }
1310                                                         if (locked_tcb) {
1311                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1312                                                         }
1313                                                         SCTP_INP_WUNLOCK(inp);
1314                                                         SCTP_INP_INFO_RUNLOCK();
1315                                                         return (stcb);
1316                                                 }
1317                                                 break;
1318                                         }
1319 #endif
1320 #ifdef INET6
1321                                 case AF_INET6:
1322                                         {
1323                                                 struct sockaddr_in6 *sin6,
1324                                                             *rsin6;
1325
1326                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1327                                                 rsin6 = (struct sockaddr_in6 *)remote;
1328                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1329                                                     rsin6)) {
1330                                                         /* found it */
1331                                                         if (netp != NULL) {
1332                                                                 *netp = net;
1333                                                         }
1334                                                         if (locked_tcb == NULL) {
1335                                                                 SCTP_INP_DECR_REF(inp);
1336                                                         } else if (locked_tcb != stcb) {
1337                                                                 SCTP_TCB_LOCK(locked_tcb);
1338                                                         }
1339                                                         if (locked_tcb) {
1340                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1341                                                         }
1342                                                         SCTP_INP_WUNLOCK(inp);
1343                                                         SCTP_INP_INFO_RUNLOCK();
1344                                                         return (stcb);
1345                                                 }
1346                                                 break;
1347                                         }
1348 #endif
1349                                 default:
1350                                         /* TSNH */
1351                                         break;
1352                                 }
1353                         }
1354                         SCTP_TCB_UNLOCK(stcb);
1355                 }
1356         } else {
1357                 SCTP_INP_WLOCK(inp);
1358                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1359                         goto null_return;
1360                 }
1361                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1362                     inp->sctp_hashmark)];
1363                 if (head == NULL) {
1364                         goto null_return;
1365                 }
1366                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1367                         if (stcb->rport != rport) {
1368                                 /* remote port does not match */
1369                                 continue;
1370                         }
1371                         SCTP_TCB_LOCK(stcb);
1372                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1373                                 SCTP_TCB_UNLOCK(stcb);
1374                                 continue;
1375                         }
1376                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1377                                 SCTP_TCB_UNLOCK(stcb);
1378                                 continue;
1379                         }
1380                         /* now look at the list of remote addresses */
1381                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1382 #ifdef INVARIANTS
1383                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1384                                         panic("Corrupt net list");
1385                                 }
1386 #endif
1387                                 if (net->ro._l_addr.sa.sa_family !=
1388                                     remote->sa_family) {
1389                                         /* not the same family */
1390                                         continue;
1391                                 }
1392                                 switch (remote->sa_family) {
1393 #ifdef INET
1394                                 case AF_INET:
1395                                         {
1396                                                 struct sockaddr_in *sin,
1397                                                            *rsin;
1398
1399                                                 sin = (struct sockaddr_in *)
1400                                                     &net->ro._l_addr;
1401                                                 rsin = (struct sockaddr_in *)remote;
1402                                                 if (sin->sin_addr.s_addr ==
1403                                                     rsin->sin_addr.s_addr) {
1404                                                         /* found it */
1405                                                         if (netp != NULL) {
1406                                                                 *netp = net;
1407                                                         }
1408                                                         if (locked_tcb == NULL) {
1409                                                                 SCTP_INP_DECR_REF(inp);
1410                                                         } else if (locked_tcb != stcb) {
1411                                                                 SCTP_TCB_LOCK(locked_tcb);
1412                                                         }
1413                                                         if (locked_tcb) {
1414                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1415                                                         }
1416                                                         SCTP_INP_WUNLOCK(inp);
1417                                                         SCTP_INP_INFO_RUNLOCK();
1418                                                         return (stcb);
1419                                                 }
1420                                                 break;
1421                                         }
1422 #endif
1423 #ifdef INET6
1424                                 case AF_INET6:
1425                                         {
1426                                                 struct sockaddr_in6 *sin6,
1427                                                             *rsin6;
1428
1429                                                 sin6 = (struct sockaddr_in6 *)
1430                                                     &net->ro._l_addr;
1431                                                 rsin6 = (struct sockaddr_in6 *)remote;
1432                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1433                                                     rsin6)) {
1434                                                         /* found it */
1435                                                         if (netp != NULL) {
1436                                                                 *netp = net;
1437                                                         }
1438                                                         if (locked_tcb == NULL) {
1439                                                                 SCTP_INP_DECR_REF(inp);
1440                                                         } else if (locked_tcb != stcb) {
1441                                                                 SCTP_TCB_LOCK(locked_tcb);
1442                                                         }
1443                                                         if (locked_tcb) {
1444                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1445                                                         }
1446                                                         SCTP_INP_WUNLOCK(inp);
1447                                                         SCTP_INP_INFO_RUNLOCK();
1448                                                         return (stcb);
1449                                                 }
1450                                                 break;
1451                                         }
1452 #endif
1453                                 default:
1454                                         /* TSNH */
1455                                         break;
1456                                 }
1457                         }
1458                         SCTP_TCB_UNLOCK(stcb);
1459                 }
1460         }
1461 null_return:
1462         /* clean up for returning null */
1463         if (locked_tcb) {
1464                 SCTP_TCB_LOCK(locked_tcb);
1465                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1466         }
1467         SCTP_INP_WUNLOCK(inp);
1468         SCTP_INP_INFO_RUNLOCK();
1469         /* not found */
1470         return (NULL);
1471 }
1472
1473 /*
1474  * Find an association for a specific endpoint using the association id given
1475  * out in the COMM_UP notification
1476  */
1477
1478 struct sctp_tcb *
1479 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1480 {
1481         /*
1482          * Use my the assoc_id to find a endpoint
1483          */
1484         struct sctpasochead *head;
1485         struct sctp_tcb *stcb;
1486         uint32_t id;
1487
1488         if (inp == NULL) {
1489                 SCTP_PRINTF("TSNH ep_associd\n");
1490                 return (NULL);
1491         }
1492         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1493                 SCTP_PRINTF("TSNH ep_associd0\n");
1494                 return (NULL);
1495         }
1496         id = (uint32_t) asoc_id;
1497         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1498         if (head == NULL) {
1499                 /* invalid id TSNH */
1500                 SCTP_PRINTF("TSNH ep_associd1\n");
1501                 return (NULL);
1502         }
1503         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1504                 if (stcb->asoc.assoc_id == id) {
1505                         if (inp != stcb->sctp_ep) {
1506                                 /*
1507                                  * some other guy has the same id active (id
1508                                  * collision ??).
1509                                  */
1510                                 SCTP_PRINTF("TSNH ep_associd2\n");
1511                                 continue;
1512                         }
1513                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1514                                 continue;
1515                         }
1516                         if (want_lock) {
1517                                 SCTP_TCB_LOCK(stcb);
1518                         }
1519                         return (stcb);
1520                 }
1521         }
1522         return (NULL);
1523 }
1524
1525
1526 struct sctp_tcb *
1527 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1528 {
1529         struct sctp_tcb *stcb;
1530
1531         SCTP_INP_RLOCK(inp);
1532         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1533         SCTP_INP_RUNLOCK(inp);
1534         return (stcb);
1535 }
1536
1537
1538 static struct sctp_inpcb *
1539 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1540     uint16_t lport, uint32_t vrf_id)
1541 {
1542         struct sctp_inpcb *inp;
1543         struct sctp_laddr *laddr;
1544
1545 #ifdef INET
1546         struct sockaddr_in *sin;
1547
1548 #endif
1549 #ifdef INET6
1550         struct sockaddr_in6 *sin6;
1551         struct sockaddr_in6 *intf_addr6;
1552
1553 #endif
1554
1555         int fnd;
1556
1557         /*
1558          * Endpoint probe expects that the INP_INFO is locked.
1559          */
1560 #ifdef INET
1561         sin = NULL;
1562 #endif
1563 #ifdef INET6
1564         sin6 = NULL;
1565 #endif
1566         switch (nam->sa_family) {
1567 #ifdef INET
1568         case AF_INET:
1569                 sin = (struct sockaddr_in *)nam;
1570                 break;
1571 #endif
1572 #ifdef INET6
1573         case AF_INET6:
1574                 sin6 = (struct sockaddr_in6 *)nam;
1575                 break;
1576 #endif
1577         default:
1578                 /* unsupported family */
1579                 return (NULL);
1580         }
1581
1582         if (head == NULL)
1583                 return (NULL);
1584
1585         LIST_FOREACH(inp, head, sctp_hash) {
1586                 SCTP_INP_RLOCK(inp);
1587                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1588                         SCTP_INP_RUNLOCK(inp);
1589                         continue;
1590                 }
1591                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1592                     (inp->sctp_lport == lport)) {
1593                         /* got it */
1594 #ifdef INET
1595                         if ((nam->sa_family == AF_INET) &&
1596                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1597                             SCTP_IPV6_V6ONLY(inp)) {
1598                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1599                                 SCTP_INP_RUNLOCK(inp);
1600                                 continue;
1601                         }
1602 #endif
1603 #ifdef INET6
1604                         /* A V6 address and the endpoint is NOT bound V6 */
1605                         if (nam->sa_family == AF_INET6 &&
1606                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1607                                 SCTP_INP_RUNLOCK(inp);
1608                                 continue;
1609                         }
1610 #endif
1611                         /* does a VRF id match? */
1612                         fnd = 0;
1613                         if (inp->def_vrf_id == vrf_id)
1614                                 fnd = 1;
1615
1616                         SCTP_INP_RUNLOCK(inp);
1617                         if (!fnd)
1618                                 continue;
1619                         return (inp);
1620                 }
1621                 SCTP_INP_RUNLOCK(inp);
1622         }
1623         switch (nam->sa_family) {
1624 #ifdef INET
1625         case AF_INET:
1626                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1627                         /* Can't hunt for one that has no address specified */
1628                         return (NULL);
1629                 }
1630                 break;
1631 #endif
1632 #ifdef INET6
1633         case AF_INET6:
1634                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1635                         /* Can't hunt for one that has no address specified */
1636                         return (NULL);
1637                 }
1638                 break;
1639 #endif
1640         default:
1641                 break;
1642         }
1643         /*
1644          * ok, not bound to all so see if we can find a EP bound to this
1645          * address.
1646          */
1647         LIST_FOREACH(inp, head, sctp_hash) {
1648                 SCTP_INP_RLOCK(inp);
1649                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1650                         SCTP_INP_RUNLOCK(inp);
1651                         continue;
1652                 }
1653                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1654                         SCTP_INP_RUNLOCK(inp);
1655                         continue;
1656                 }
1657                 /*
1658                  * Ok this could be a likely candidate, look at all of its
1659                  * addresses
1660                  */
1661                 if (inp->sctp_lport != lport) {
1662                         SCTP_INP_RUNLOCK(inp);
1663                         continue;
1664                 }
1665                 /* does a VRF id match? */
1666                 fnd = 0;
1667                 if (inp->def_vrf_id == vrf_id)
1668                         fnd = 1;
1669
1670                 if (!fnd) {
1671                         SCTP_INP_RUNLOCK(inp);
1672                         continue;
1673                 }
1674                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1675                         if (laddr->ifa == NULL) {
1676                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1677                                     __FUNCTION__);
1678                                 continue;
1679                         }
1680                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1681                             (void *)laddr->ifa);
1682                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1683                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1684                                 continue;
1685                         }
1686                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1687                                 /* possible, see if it matches */
1688                                 switch (nam->sa_family) {
1689 #ifdef INET
1690                                 case AF_INET:
1691                                         if (sin->sin_addr.s_addr ==
1692                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1693                                                 SCTP_INP_RUNLOCK(inp);
1694                                                 return (inp);
1695                                         }
1696                                         break;
1697 #endif
1698 #ifdef INET6
1699                                 case AF_INET6:
1700                                         intf_addr6 = &laddr->ifa->address.sin6;
1701                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1702                                             intf_addr6)) {
1703                                                 SCTP_INP_RUNLOCK(inp);
1704                                                 return (inp);
1705                                         }
1706                                         break;
1707 #endif
1708                                 }
1709                         }
1710                 }
1711                 SCTP_INP_RUNLOCK(inp);
1712         }
1713         return (NULL);
1714 }
1715
1716
1717 static struct sctp_inpcb *
1718 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1719 {
1720         struct sctppcbhead *head;
1721         struct sctp_inpcb *t_inp;
1722         int fnd;
1723
1724         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1725             SCTP_BASE_INFO(hashmark))];
1726         LIST_FOREACH(t_inp, head, sctp_hash) {
1727                 if (t_inp->sctp_lport != lport) {
1728                         continue;
1729                 }
1730                 /* is it in the VRF in question */
1731                 fnd = 0;
1732                 if (t_inp->def_vrf_id == vrf_id)
1733                         fnd = 1;
1734                 if (!fnd)
1735                         continue;
1736
1737                 /* This one is in use. */
1738                 /* check the v6/v4 binding issue */
1739                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1740                     SCTP_IPV6_V6ONLY(t_inp)) {
1741                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1742                                 /* collision in V6 space */
1743                                 return (t_inp);
1744                         } else {
1745                                 /* inp is BOUND_V4 no conflict */
1746                                 continue;
1747                         }
1748                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1749                         /* t_inp is bound v4 and v6, conflict always */
1750                         return (t_inp);
1751                 } else {
1752                         /* t_inp is bound only V4 */
1753                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1754                             SCTP_IPV6_V6ONLY(inp)) {
1755                                 /* no conflict */
1756                                 continue;
1757                         }
1758                         /* else fall through to conflict */
1759                 }
1760                 return (t_inp);
1761         }
1762         return (NULL);
1763 }
1764
1765
1766 int
1767 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1768 {
1769         /* For 1-2-1 with port reuse */
1770         struct sctppcbhead *head;
1771         struct sctp_inpcb *tinp;
1772
1773         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1774                 /* only works with port reuse on */
1775                 return (-1);
1776         }
1777         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1778                 return (0);
1779         }
1780         SCTP_INP_RUNLOCK(inp);
1781         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1782             SCTP_BASE_INFO(hashmark))];
1783         /* Kick out all non-listeners to the TCP hash */
1784         LIST_FOREACH(tinp, head, sctp_hash) {
1785                 if (tinp->sctp_lport != inp->sctp_lport) {
1786                         continue;
1787                 }
1788                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1789                         continue;
1790                 }
1791                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1792                         continue;
1793                 }
1794                 if (tinp->sctp_socket->so_qlimit) {
1795                         continue;
1796                 }
1797                 SCTP_INP_WLOCK(tinp);
1798                 LIST_REMOVE(tinp, sctp_hash);
1799                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1800                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1801                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1802                 SCTP_INP_WUNLOCK(tinp);
1803         }
1804         SCTP_INP_WLOCK(inp);
1805         /* Pull from where he was */
1806         LIST_REMOVE(inp, sctp_hash);
1807         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1808         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1809         LIST_INSERT_HEAD(head, inp, sctp_hash);
1810         SCTP_INP_WUNLOCK(inp);
1811         SCTP_INP_RLOCK(inp);
1812         return (0);
1813 }
1814
1815
1816 struct sctp_inpcb *
1817 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1818     uint32_t vrf_id)
1819 {
1820         /*
1821          * First we check the hash table to see if someone has this port
1822          * bound with just the port.
1823          */
1824         struct sctp_inpcb *inp;
1825         struct sctppcbhead *head;
1826         int lport;
1827         unsigned int i;
1828
1829 #ifdef INET
1830         struct sockaddr_in *sin;
1831
1832 #endif
1833 #ifdef INET6
1834         struct sockaddr_in6 *sin6;
1835
1836 #endif
1837
1838         switch (nam->sa_family) {
1839 #ifdef INET
1840         case AF_INET:
1841                 sin = (struct sockaddr_in *)nam;
1842                 lport = sin->sin_port;
1843                 break;
1844 #endif
1845 #ifdef INET6
1846         case AF_INET6:
1847                 sin6 = (struct sockaddr_in6 *)nam;
1848                 lport = sin6->sin6_port;
1849                 break;
1850 #endif
1851         default:
1852                 return (NULL);
1853         }
1854         /*
1855          * I could cheat here and just cast to one of the types but we will
1856          * do it right. It also provides the check against an Unsupported
1857          * type too.
1858          */
1859         /* Find the head of the ALLADDR chain */
1860         if (have_lock == 0) {
1861                 SCTP_INP_INFO_RLOCK();
1862         }
1863         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1864             SCTP_BASE_INFO(hashmark))];
1865         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1866
1867         /*
1868          * If the TCP model exists it could be that the main listening
1869          * endpoint is gone but there still exists a connected socket for
1870          * this guy. If so we can return the first one that we find. This
1871          * may NOT be the correct one so the caller should be wary on the
1872          * returned INP. Currently the only caller that sets find_tcp_pool
1873          * is in bindx where we are verifying that a user CAN bind the
1874          * address. He either has bound it already, or someone else has, or
1875          * its open to bind, so this is good enough.
1876          */
1877         if (inp == NULL && find_tcp_pool) {
1878                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1879                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1880                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1881                         if (inp) {
1882                                 break;
1883                         }
1884                 }
1885         }
1886         if (inp) {
1887                 SCTP_INP_INCR_REF(inp);
1888         }
1889         if (have_lock == 0) {
1890                 SCTP_INP_INFO_RUNLOCK();
1891         }
1892         return (inp);
1893 }
1894
1895 /*
1896  * Find an association for an endpoint with the pointer to whom you want to
1897  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1898  * need to change the *to to some other struct like a mbuf...
1899  */
1900 struct sctp_tcb *
1901 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
1902     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1903     uint32_t vrf_id)
1904 {
1905         struct sctp_inpcb *inp = NULL;
1906         struct sctp_tcb *retval;
1907
1908         SCTP_INP_INFO_RLOCK();
1909         if (find_tcp_pool) {
1910                 if (inp_p != NULL) {
1911                         retval = sctp_tcb_special_locate(inp_p, from, to, netp,
1912                             vrf_id);
1913                 } else {
1914                         retval = sctp_tcb_special_locate(&inp, from, to, netp,
1915                             vrf_id);
1916                 }
1917                 if (retval != NULL) {
1918                         SCTP_INP_INFO_RUNLOCK();
1919                         return (retval);
1920                 }
1921         }
1922         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1923         if (inp_p != NULL) {
1924                 *inp_p = inp;
1925         }
1926         SCTP_INP_INFO_RUNLOCK();
1927
1928         if (inp == NULL) {
1929                 return (NULL);
1930         }
1931         /*
1932          * ok, we have an endpoint, now lets find the assoc for it (if any)
1933          * we now place the source address or from in the to of the find
1934          * endpoint call. Since in reality this chain is used from the
1935          * inbound packet side.
1936          */
1937         if (inp_p != NULL) {
1938                 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1939                     NULL);
1940         } else {
1941                 retval = sctp_findassociation_ep_addr(&inp, from, netp, to,
1942                     NULL);
1943         }
1944         return retval;
1945 }
1946
1947
1948 /*
1949  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1950  * find all addresses that the sender has specified in any address list. Each
1951  * address will be used to lookup the TCB and see if one exits.
1952  */
1953 static struct sctp_tcb *
1954 sctp_findassociation_special_addr(struct mbuf *m, int offset,
1955     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1956     struct sockaddr *dst)
1957 {
1958         struct sctp_paramhdr *phdr, parm_buf;
1959         struct sctp_tcb *retval;
1960         uint32_t ptype, plen;
1961
1962 #ifdef INET
1963         struct sockaddr_in sin4;
1964
1965 #endif
1966 #ifdef INET6
1967         struct sockaddr_in6 sin6;
1968
1969 #endif
1970
1971 #ifdef INET
1972         memset(&sin4, 0, sizeof(sin4));
1973         sin4.sin_len = sizeof(sin4);
1974         sin4.sin_family = AF_INET;
1975         sin4.sin_port = sh->src_port;
1976 #endif
1977 #ifdef INET6
1978         memset(&sin6, 0, sizeof(sin6));
1979         sin6.sin6_len = sizeof(sin6);
1980         sin6.sin6_family = AF_INET6;
1981         sin6.sin6_port = sh->src_port;
1982 #endif
1983
1984         retval = NULL;
1985         offset += sizeof(struct sctp_init_chunk);
1986
1987         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1988         while (phdr != NULL) {
1989                 /* now we must see if we want the parameter */
1990                 ptype = ntohs(phdr->param_type);
1991                 plen = ntohs(phdr->param_length);
1992                 if (plen == 0) {
1993                         break;
1994                 }
1995 #ifdef INET
1996                 if (ptype == SCTP_IPV4_ADDRESS &&
1997                     plen == sizeof(struct sctp_ipv4addr_param)) {
1998                         /* Get the rest of the address */
1999                         struct sctp_ipv4addr_param ip4_parm, *p4;
2000
2001                         phdr = sctp_get_next_param(m, offset,
2002                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2003                         if (phdr == NULL) {
2004                                 return (NULL);
2005                         }
2006                         p4 = (struct sctp_ipv4addr_param *)phdr;
2007                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2008                         /* look it up */
2009                         retval = sctp_findassociation_ep_addr(inp_p,
2010                             (struct sockaddr *)&sin4, netp, dst, NULL);
2011                         if (retval != NULL) {
2012                                 return (retval);
2013                         }
2014                 }
2015 #endif
2016 #ifdef INET6
2017                 if (ptype == SCTP_IPV6_ADDRESS &&
2018                     plen == sizeof(struct sctp_ipv6addr_param)) {
2019                         /* Get the rest of the address */
2020                         struct sctp_ipv6addr_param ip6_parm, *p6;
2021
2022                         phdr = sctp_get_next_param(m, offset,
2023                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
2024                         if (phdr == NULL) {
2025                                 return (NULL);
2026                         }
2027                         p6 = (struct sctp_ipv6addr_param *)phdr;
2028                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2029                         /* look it up */
2030                         retval = sctp_findassociation_ep_addr(inp_p,
2031                             (struct sockaddr *)&sin6, netp, dst, NULL);
2032                         if (retval != NULL) {
2033                                 return (retval);
2034                         }
2035                 }
2036 #endif
2037                 offset += SCTP_SIZE32(plen);
2038                 phdr = sctp_get_next_param(m, offset, &parm_buf,
2039                     sizeof(parm_buf));
2040         }
2041         return (NULL);
2042 }
2043
2044 static struct sctp_tcb *
2045 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2046     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2047     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2048 {
2049         /*
2050          * Use my vtag to hash. If we find it we then verify the source addr
2051          * is in the assoc. If all goes well we save a bit on rec of a
2052          * packet.
2053          */
2054         struct sctpasochead *head;
2055         struct sctp_nets *net;
2056         struct sctp_tcb *stcb;
2057
2058         SCTP_INP_INFO_RLOCK();
2059         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2060             SCTP_BASE_INFO(hashasocmark))];
2061         if (head == NULL) {
2062                 /* invalid vtag */
2063                 SCTP_INP_INFO_RUNLOCK();
2064                 return (NULL);
2065         }
2066         LIST_FOREACH(stcb, head, sctp_asocs) {
2067                 SCTP_INP_RLOCK(stcb->sctp_ep);
2068                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2069                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2070                         continue;
2071                 }
2072                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2073                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2074                         continue;
2075                 }
2076                 SCTP_TCB_LOCK(stcb);
2077                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2078                 if (stcb->asoc.my_vtag == vtag) {
2079                         /* candidate */
2080                         if (stcb->rport != rport) {
2081                                 SCTP_TCB_UNLOCK(stcb);
2082                                 continue;
2083                         }
2084                         if (stcb->sctp_ep->sctp_lport != lport) {
2085                                 SCTP_TCB_UNLOCK(stcb);
2086                                 continue;
2087                         }
2088                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2089                                 SCTP_TCB_UNLOCK(stcb);
2090                                 continue;
2091                         }
2092                         /* RRS:Need toaddr check here */
2093                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2094                                 /* Endpoint does not own this address */
2095                                 SCTP_TCB_UNLOCK(stcb);
2096                                 continue;
2097                         }
2098                         if (remote_tag) {
2099                                 /*
2100                                  * If we have both vtags that's all we match
2101                                  * on
2102                                  */
2103                                 if (stcb->asoc.peer_vtag == remote_tag) {
2104                                         /*
2105                                          * If both tags match we consider it
2106                                          * conclusive and check NO
2107                                          * source/destination addresses
2108                                          */
2109                                         goto conclusive;
2110                                 }
2111                         }
2112                         if (skip_src_check) {
2113                 conclusive:
2114                                 if (from) {
2115                                         *netp = sctp_findnet(stcb, from);
2116                                 } else {
2117                                         *netp = NULL;   /* unknown */
2118                                 }
2119                                 if (inp_p)
2120                                         *inp_p = stcb->sctp_ep;
2121                                 SCTP_INP_INFO_RUNLOCK();
2122                                 return (stcb);
2123                         }
2124                         net = sctp_findnet(stcb, from);
2125                         if (net) {
2126                                 /* yep its him. */
2127                                 *netp = net;
2128                                 SCTP_STAT_INCR(sctps_vtagexpress);
2129                                 *inp_p = stcb->sctp_ep;
2130                                 SCTP_INP_INFO_RUNLOCK();
2131                                 return (stcb);
2132                         } else {
2133                                 /*
2134                                  * not him, this should only happen in rare
2135                                  * cases so I peg it.
2136                                  */
2137                                 SCTP_STAT_INCR(sctps_vtagbogus);
2138                         }
2139                 }
2140                 SCTP_TCB_UNLOCK(stcb);
2141         }
2142         SCTP_INP_INFO_RUNLOCK();
2143         return (NULL);
2144 }
2145
2146 /*
2147  * Find an association with the pointer to the inbound IP packet. This can be
2148  * a IPv4 or IPv6 packet.
2149  */
2150 struct sctp_tcb *
2151 sctp_findassociation_addr(struct mbuf *m, int offset,
2152     struct sockaddr *src, struct sockaddr *dst,
2153     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2154     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2155 {
2156         int find_tcp_pool;
2157         struct sctp_tcb *retval;
2158         struct sctp_inpcb *inp;
2159
2160         if (sh->v_tag) {
2161                 /* we only go down this path if vtag is non-zero */
2162                 retval = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2163                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2164                 if (retval) {
2165                         return (retval);
2166                 }
2167         }
2168         find_tcp_pool = 0;
2169         if ((ch->chunk_type != SCTP_INITIATION) &&
2170             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2171             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2172             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2173                 /* Other chunk types go to the tcp pool. */
2174                 find_tcp_pool = 1;
2175         }
2176         if (inp_p) {
2177                 retval = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2178                     find_tcp_pool, vrf_id);
2179                 inp = *inp_p;
2180         } else {
2181                 retval = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2182                     find_tcp_pool, vrf_id);
2183         }
2184         SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", (void *)retval, (void *)inp);
2185         if (retval == NULL && inp) {
2186                 /* Found a EP but not this address */
2187                 if ((ch->chunk_type == SCTP_INITIATION) ||
2188                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2189                         /*-
2190                          * special hook, we do NOT return linp or an
2191                          * association that is linked to an existing
2192                          * association that is under the TCP pool (i.e. no
2193                          * listener exists). The endpoint finding routine
2194                          * will always find a listener before examining the
2195                          * TCP pool.
2196                          */
2197                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2198                                 if (inp_p) {
2199                                         *inp_p = NULL;
2200                                 }
2201                                 return (NULL);
2202                         }
2203                         retval = sctp_findassociation_special_addr(m,
2204                             offset, sh, &inp, netp, dst);
2205                         if (inp_p != NULL) {
2206                                 *inp_p = inp;
2207                         }
2208                 }
2209         }
2210         SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", (void *)retval);
2211         return (retval);
2212 }
2213
2214 /*
2215  * lookup an association by an ASCONF lookup address.
2216  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2217  */
2218 struct sctp_tcb *
2219 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2220     struct sockaddr *dst, struct sctphdr *sh,
2221     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2222 {
2223         struct sctp_tcb *stcb;
2224         struct sockaddr_storage remote_store;
2225         struct sctp_paramhdr parm_buf, *phdr;
2226         int ptype;
2227         int zero_address = 0;
2228
2229 #ifdef INET
2230         struct sockaddr_in *sin;
2231
2232 #endif
2233 #ifdef INET6
2234         struct sockaddr_in6 *sin6;
2235
2236 #endif
2237
2238         memset(&remote_store, 0, sizeof(remote_store));
2239         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2240             &parm_buf, sizeof(struct sctp_paramhdr));
2241         if (phdr == NULL) {
2242                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2243                     __FUNCTION__);
2244                 return NULL;
2245         }
2246         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2247         /* get the correlation address */
2248         switch (ptype) {
2249 #ifdef INET6
2250         case SCTP_IPV6_ADDRESS:
2251                 {
2252                         /* ipv6 address param */
2253                         struct sctp_ipv6addr_param *p6, p6_buf;
2254
2255                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2256                                 return NULL;
2257                         }
2258                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2259                             offset + sizeof(struct sctp_asconf_chunk),
2260                             &p6_buf.ph, sizeof(*p6));
2261                         if (p6 == NULL) {
2262                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2263                                     __FUNCTION__);
2264                                 return (NULL);
2265                         }
2266                         sin6 = (struct sockaddr_in6 *)&remote_store;
2267                         sin6->sin6_family = AF_INET6;
2268                         sin6->sin6_len = sizeof(*sin6);
2269                         sin6->sin6_port = sh->src_port;
2270                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2271                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2272                                 zero_address = 1;
2273                         break;
2274                 }
2275 #endif
2276 #ifdef INET
2277         case SCTP_IPV4_ADDRESS:
2278                 {
2279                         /* ipv4 address param */
2280                         struct sctp_ipv4addr_param *p4, p4_buf;
2281
2282                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2283                                 return NULL;
2284                         }
2285                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2286                             offset + sizeof(struct sctp_asconf_chunk),
2287                             &p4_buf.ph, sizeof(*p4));
2288                         if (p4 == NULL) {
2289                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2290                                     __FUNCTION__);
2291                                 return (NULL);
2292                         }
2293                         sin = (struct sockaddr_in *)&remote_store;
2294                         sin->sin_family = AF_INET;
2295                         sin->sin_len = sizeof(*sin);
2296                         sin->sin_port = sh->src_port;
2297                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2298                         if (sin->sin_addr.s_addr == INADDR_ANY)
2299                                 zero_address = 1;
2300                         break;
2301                 }
2302 #endif
2303         default:
2304                 /* invalid address param type */
2305                 return NULL;
2306         }
2307
2308         if (zero_address) {
2309                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2310                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2311                 if (stcb != NULL) {
2312                         SCTP_INP_DECR_REF(*inp_p);
2313                 }
2314         } else {
2315                 stcb = sctp_findassociation_ep_addr(inp_p,
2316                     (struct sockaddr *)&remote_store, netp,
2317                     dst, NULL);
2318         }
2319         return (stcb);
2320 }
2321
2322
2323 /*
2324  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2325  * addresses. This way if we don't get a bind we by default pick a ephemeral
2326  * port with all addresses bound.
2327  */
2328 int
2329 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2330 {
2331         /*
2332          * we get called when a new endpoint starts up. We need to allocate
2333          * the sctp_inpcb structure from the zone and init it. Mark it as
2334          * unbound and find a port that we can use as an ephemeral with
2335          * INADDR_ANY. If the user binds later no problem we can then add in
2336          * the specific addresses. And setup the default parameters for the
2337          * EP.
2338          */
2339         int i, error;
2340         struct sctp_inpcb *inp;
2341         struct sctp_pcb *m;
2342         struct timeval time;
2343         sctp_sharedkey_t *null_key;
2344
2345         error = 0;
2346
2347         SCTP_INP_INFO_WLOCK();
2348         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2349         if (inp == NULL) {
2350                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2351                 SCTP_INP_INFO_WUNLOCK();
2352                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2353                 return (ENOBUFS);
2354         }
2355         /* zap it */
2356         bzero(inp, sizeof(*inp));
2357
2358         /* bump generations */
2359         /* setup socket pointers */
2360         inp->sctp_socket = so;
2361         inp->ip_inp.inp.inp_socket = so;
2362 #ifdef INET6
2363         if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2364                 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2365         }
2366 #endif
2367         inp->sctp_associd_counter = 1;
2368         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2369         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2370         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2371         inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable);
2372         /* init the small hash table we use to track asocid <-> tcb */
2373         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2374         if (inp->sctp_asocidhash == NULL) {
2375                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2376                 SCTP_INP_INFO_WUNLOCK();
2377                 return (ENOBUFS);
2378         }
2379 #ifdef IPSEC
2380         {
2381                 struct inpcbpolicy *pcb_sp = NULL;
2382
2383                 error = ipsec_init_policy(so, &pcb_sp);
2384                 /* Arrange to share the policy */
2385                 inp->ip_inp.inp.inp_sp = pcb_sp;
2386                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2387         }
2388         if (error != 0) {
2389                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2390                 SCTP_INP_INFO_WUNLOCK();
2391                 return error;
2392         }
2393 #endif                          /* IPSEC */
2394         SCTP_INCR_EP_COUNT();
2395         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2396         SCTP_INP_INFO_WUNLOCK();
2397
2398         so->so_pcb = (caddr_t)inp;
2399
2400         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2401                 /* UDP style socket */
2402                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2403                     SCTP_PCB_FLAGS_UNBOUND);
2404                 /* Be sure it is NON-BLOCKING IO for UDP */
2405                 /* SCTP_SET_SO_NBIO(so); */
2406         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2407                 /* TCP style socket */
2408                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2409                     SCTP_PCB_FLAGS_UNBOUND);
2410                 /* Be sure we have blocking IO by default */
2411                 SCTP_CLEAR_SO_NBIO(so);
2412         } else {
2413                 /*
2414                  * unsupported socket type (RAW, etc)- in case we missed it
2415                  * in protosw
2416                  */
2417                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2418                 so->so_pcb = NULL;
2419                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2420                 return (EOPNOTSUPP);
2421         }
2422         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2423                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2424                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2425         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2426                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2427                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2428         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2429                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2430                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2431         }
2432         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2433             &inp->sctp_hashmark);
2434         if (inp->sctp_tcbhash == NULL) {
2435                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2436                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2437                 so->so_pcb = NULL;
2438                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2439                 return (ENOBUFS);
2440         }
2441         inp->def_vrf_id = vrf_id;
2442
2443         SCTP_INP_INFO_WLOCK();
2444         SCTP_INP_LOCK_INIT(inp);
2445         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2446         SCTP_INP_READ_INIT(inp);
2447         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2448         /* lock the new ep */
2449         SCTP_INP_WLOCK(inp);
2450
2451         /* add it to the info area */
2452         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2453         SCTP_INP_INFO_WUNLOCK();
2454
2455         TAILQ_INIT(&inp->read_queue);
2456         LIST_INIT(&inp->sctp_addr_list);
2457
2458         LIST_INIT(&inp->sctp_asoc_list);
2459
2460 #ifdef SCTP_TRACK_FREED_ASOCS
2461         /* TEMP CODE */
2462         LIST_INIT(&inp->sctp_asoc_free_list);
2463 #endif
2464         /* Init the timer structure for signature change */
2465         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2466         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2467
2468         /* now init the actual endpoint default data */
2469         m = &inp->sctp_ep;
2470
2471         /* setup the base timeout information */
2472         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2473         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2474         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2475         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2476         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2477         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2478         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2479         /* all max/min max are in ms */
2480         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2481         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2482         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2483         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2484         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2485
2486         m->max_open_streams_intome = MAX_SCTP_STREAMS;
2487
2488         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2489         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2490         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2491         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2492         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2493         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2494         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2495         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2496
2497         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2498         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2499         /* number of streams to pre-open on a association */
2500         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2501
2502         /* Add adaptation cookie */
2503         m->adaptation_layer_indicator = 0x504C5253;
2504
2505         /* seed random number generator */
2506         m->random_counter = 1;
2507         m->store_at = SCTP_SIGNATURE_SIZE;
2508         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2509         sctp_fill_random_store(m);
2510
2511         /* Minimum cookie size */
2512         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2513             sizeof(struct sctp_state_cookie);
2514         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2515
2516         /* Setup the initial secret */
2517         (void)SCTP_GETTIME_TIMEVAL(&time);
2518         m->time_of_secret_change = time.tv_sec;
2519
2520         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2521                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2522         }
2523         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2524
2525         /* How long is a cookie good for ? */
2526         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2527         /*
2528          * Initialize authentication parameters
2529          */
2530         m->local_hmacs = sctp_default_supported_hmaclist();
2531         m->local_auth_chunks = sctp_alloc_chunklist();
2532         m->default_dscp = 0;
2533 #ifdef INET6
2534         m->default_flowlabel = 0;
2535 #endif
2536         m->port = 0;            /* encapsulation disabled by default */
2537         sctp_auth_set_default_chunks(m->local_auth_chunks);
2538         LIST_INIT(&m->shared_keys);
2539         /* add default NULL key as key id 0 */
2540         null_key = sctp_alloc_sharedkey();
2541         sctp_insert_sharedkey(&m->shared_keys, null_key);
2542         SCTP_INP_WUNLOCK(inp);
2543 #ifdef SCTP_LOG_CLOSING
2544         sctp_log_closing(inp, NULL, 12);
2545 #endif
2546         return (error);
2547 }
2548
2549
2550 void
2551 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2552     struct sctp_tcb *stcb)
2553 {
2554         struct sctp_nets *net;
2555         uint16_t lport, rport;
2556         struct sctppcbhead *head;
2557         struct sctp_laddr *laddr, *oladdr;
2558
2559         atomic_add_int(&stcb->asoc.refcnt, 1);
2560         SCTP_TCB_UNLOCK(stcb);
2561         SCTP_INP_INFO_WLOCK();
2562         SCTP_INP_WLOCK(old_inp);
2563         SCTP_INP_WLOCK(new_inp);
2564         SCTP_TCB_LOCK(stcb);
2565         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2566
2567         new_inp->sctp_ep.time_of_secret_change =
2568             old_inp->sctp_ep.time_of_secret_change;
2569         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2570             sizeof(old_inp->sctp_ep.secret_key));
2571         new_inp->sctp_ep.current_secret_number =
2572             old_inp->sctp_ep.current_secret_number;
2573         new_inp->sctp_ep.last_secret_number =
2574             old_inp->sctp_ep.last_secret_number;
2575         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2576
2577         /* make it so new data pours into the new socket */
2578         stcb->sctp_socket = new_inp->sctp_socket;
2579         stcb->sctp_ep = new_inp;
2580
2581         /* Copy the port across */
2582         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2583         rport = stcb->rport;
2584         /* Pull the tcb from the old association */
2585         LIST_REMOVE(stcb, sctp_tcbhash);
2586         LIST_REMOVE(stcb, sctp_tcblist);
2587         if (stcb->asoc.in_asocid_hash) {
2588                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2589         }
2590         /* Now insert the new_inp into the TCP connected hash */
2591         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2592
2593         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2594         /* Its safe to access */
2595         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2596
2597         /* Now move the tcb into the endpoint list */
2598         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2599         /*
2600          * Question, do we even need to worry about the ep-hash since we
2601          * only have one connection? Probably not :> so lets get rid of it
2602          * and not suck up any kernel memory in that.
2603          */
2604         if (stcb->asoc.in_asocid_hash) {
2605                 struct sctpasochead *lhd;
2606
2607                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2608                     new_inp->hashasocidmark)];
2609                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2610         }
2611         /* Ok. Let's restart timer. */
2612         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2613                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2614                     stcb, net);
2615         }
2616
2617         SCTP_INP_INFO_WUNLOCK();
2618         if (new_inp->sctp_tcbhash != NULL) {
2619                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2620                 new_inp->sctp_tcbhash = NULL;
2621         }
2622         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2623                 /* Subset bound, so copy in the laddr list from the old_inp */
2624                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2625                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2626                         if (laddr == NULL) {
2627                                 /*
2628                                  * Gak, what can we do? This assoc is really
2629                                  * HOSED. We probably should send an abort
2630                                  * here.
2631                                  */
2632                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2633                                 continue;
2634                         }
2635                         SCTP_INCR_LADDR_COUNT();
2636                         bzero(laddr, sizeof(*laddr));
2637                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2638                         laddr->ifa = oladdr->ifa;
2639                         atomic_add_int(&laddr->ifa->refcount, 1);
2640                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2641                             sctp_nxt_addr);
2642                         new_inp->laddr_count++;
2643                         if (oladdr == stcb->asoc.last_used_address) {
2644                                 stcb->asoc.last_used_address = laddr;
2645                         }
2646                 }
2647         }
2648         /*
2649          * Now any running timers need to be adjusted since we really don't
2650          * care if they are running or not just blast in the new_inp into
2651          * all of them.
2652          */
2653
2654         stcb->asoc.dack_timer.ep = (void *)new_inp;
2655         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2656         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2657         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2658         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2659         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2660         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2661         /* now what about the nets? */
2662         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2663                 net->pmtu_timer.ep = (void *)new_inp;
2664                 net->hb_timer.ep = (void *)new_inp;
2665                 net->rxt_timer.ep = (void *)new_inp;
2666         }
2667         SCTP_INP_WUNLOCK(new_inp);
2668         SCTP_INP_WUNLOCK(old_inp);
2669 }
2670
2671
2672
2673
2674 /* sctp_ifap is used to bypass normal local address validation checks */
2675 int
2676 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2677     struct sctp_ifa *sctp_ifap, struct thread *p)
2678 {
2679         /* bind a ep to a socket address */
2680         struct sctppcbhead *head;
2681         struct sctp_inpcb *inp, *inp_tmp;
2682         struct inpcb *ip_inp;
2683         int port_reuse_active = 0;
2684         int bindall;
2685         uint16_t lport;
2686         int error;
2687         uint32_t vrf_id;
2688
2689         lport = 0;
2690         error = 0;
2691         bindall = 1;
2692         inp = (struct sctp_inpcb *)so->so_pcb;
2693         ip_inp = (struct inpcb *)so->so_pcb;
2694 #ifdef SCTP_DEBUG
2695         if (addr) {
2696                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
2697                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2698                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
2699                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2700         }
2701 #endif
2702         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2703                 /* already did a bind, subsequent binds NOT allowed ! */
2704                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2705                 return (EINVAL);
2706         }
2707 #ifdef INVARIANTS
2708         if (p == NULL)
2709                 panic("null proc/thread");
2710 #endif
2711         if (addr != NULL) {
2712                 switch (addr->sa_family) {
2713 #ifdef INET
2714                 case AF_INET:
2715                         {
2716                                 struct sockaddr_in *sin;
2717
2718                                 /* IPV6_V6ONLY socket? */
2719                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2720                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2721                                         return (EINVAL);
2722                                 }
2723                                 if (addr->sa_len != sizeof(*sin)) {
2724                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2725                                         return (EINVAL);
2726                                 }
2727                                 sin = (struct sockaddr_in *)addr;
2728                                 lport = sin->sin_port;
2729                                 /*
2730                                  * For LOOPBACK the prison_local_ip4() call
2731                                  * will transmute the ip address to the
2732                                  * proper value.
2733                                  */
2734                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2735                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2736                                         return (error);
2737                                 }
2738                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2739                                         bindall = 0;
2740                                 }
2741                                 break;
2742                         }
2743 #endif
2744 #ifdef INET6
2745                 case AF_INET6:
2746                         {
2747                                 /*
2748                                  * Only for pure IPv6 Address. (No IPv4
2749                                  * Mapped!)
2750                                  */
2751                                 struct sockaddr_in6 *sin6;
2752
2753                                 sin6 = (struct sockaddr_in6 *)addr;
2754
2755                                 if (addr->sa_len != sizeof(*sin6)) {
2756                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2757                                         return (EINVAL);
2758                                 }
2759                                 lport = sin6->sin6_port;
2760                                 /*
2761                                  * For LOOPBACK the prison_local_ip6() call
2762                                  * will transmute the ipv6 address to the
2763                                  * proper value.
2764                                  */
2765                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2766                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2767                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2768                                         return (error);
2769                                 }
2770                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2771                                         bindall = 0;
2772                                         /* KAME hack: embed scopeid */
2773                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2774                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2775                                                 return (EINVAL);
2776                                         }
2777                                 }
2778                                 /* this must be cleared for ifa_ifwithaddr() */
2779                                 sin6->sin6_scope_id = 0;
2780                                 break;
2781                         }
2782 #endif
2783                 default:
2784                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2785                         return (EAFNOSUPPORT);
2786                 }
2787         }
2788         SCTP_INP_INFO_WLOCK();
2789         SCTP_INP_WLOCK(inp);
2790         /* Setup a vrf_id to be the default for the non-bind-all case. */
2791         vrf_id = inp->def_vrf_id;
2792
2793         /* increase our count due to the unlock we do */
2794         SCTP_INP_INCR_REF(inp);
2795         if (lport) {
2796                 /*
2797                  * Did the caller specify a port? if so we must see if an ep
2798                  * already has this one bound.
2799                  */
2800                 /* got to be root to get at low ports */
2801                 if (ntohs(lport) < IPPORT_RESERVED) {
2802                         if (p && (error =
2803                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2804                             )) {
2805                                 SCTP_INP_DECR_REF(inp);
2806                                 SCTP_INP_WUNLOCK(inp);
2807                                 SCTP_INP_INFO_WUNLOCK();
2808                                 return (error);
2809                         }
2810                 }
2811                 if (p == NULL) {
2812                         SCTP_INP_DECR_REF(inp);
2813                         SCTP_INP_WUNLOCK(inp);
2814                         SCTP_INP_INFO_WUNLOCK();
2815                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2816                         return (error);
2817                 }
2818                 SCTP_INP_WUNLOCK(inp);
2819                 if (bindall) {
2820                         vrf_id = inp->def_vrf_id;
2821                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2822                         if (inp_tmp != NULL) {
2823                                 /*
2824                                  * lock guy returned and lower count note
2825                                  * that we are not bound so inp_tmp should
2826                                  * NEVER be inp. And it is this inp
2827                                  * (inp_tmp) that gets the reference bump,
2828                                  * so we must lower it.
2829                                  */
2830                                 SCTP_INP_DECR_REF(inp_tmp);
2831                                 /* unlock info */
2832                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2833                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2834                                         /*
2835                                          * Ok, must be one-2-one and
2836                                          * allowing port re-use
2837                                          */
2838                                         port_reuse_active = 1;
2839                                         goto continue_anyway;
2840                                 }
2841                                 SCTP_INP_DECR_REF(inp);
2842                                 SCTP_INP_INFO_WUNLOCK();
2843                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2844                                 return (EADDRINUSE);
2845                         }
2846                 } else {
2847                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2848                         if (inp_tmp != NULL) {
2849                                 /*
2850                                  * lock guy returned and lower count note
2851                                  * that we are not bound so inp_tmp should
2852                                  * NEVER be inp. And it is this inp
2853                                  * (inp_tmp) that gets the reference bump,
2854                                  * so we must lower it.
2855                                  */
2856                                 SCTP_INP_DECR_REF(inp_tmp);
2857                                 /* unlock info */
2858                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2859                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2860                                         /*
2861                                          * Ok, must be one-2-one and
2862                                          * allowing port re-use
2863                                          */
2864                                         port_reuse_active = 1;
2865                                         goto continue_anyway;
2866                                 }
2867                                 SCTP_INP_DECR_REF(inp);
2868                                 SCTP_INP_INFO_WUNLOCK();
2869                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2870                                 return (EADDRINUSE);
2871                         }
2872                 }
2873 continue_anyway:
2874                 SCTP_INP_WLOCK(inp);
2875                 if (bindall) {
2876                         /* verify that no lport is not used by a singleton */
2877                         if ((port_reuse_active == 0) &&
2878                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
2879                                 /* Sorry someone already has this one bound */
2880                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2881                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2882                                         port_reuse_active = 1;
2883                                 } else {
2884                                         SCTP_INP_DECR_REF(inp);
2885                                         SCTP_INP_WUNLOCK(inp);
2886                                         SCTP_INP_INFO_WUNLOCK();
2887                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2888                                         return (EADDRINUSE);
2889                                 }
2890                         }
2891                 }
2892         } else {
2893                 uint16_t first, last, candidate;
2894                 uint16_t count;
2895                 int done;
2896
2897                 if (ip_inp->inp_flags & INP_HIGHPORT) {
2898                         first = MODULE_GLOBAL(ipport_hifirstauto);
2899                         last = MODULE_GLOBAL(ipport_hilastauto);
2900                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2901                         if (p && (error =
2902                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2903                             )) {
2904                                 SCTP_INP_DECR_REF(inp);
2905                                 SCTP_INP_WUNLOCK(inp);
2906                                 SCTP_INP_INFO_WUNLOCK();
2907                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2908                                 return (error);
2909                         }
2910                         first = MODULE_GLOBAL(ipport_lowfirstauto);
2911                         last = MODULE_GLOBAL(ipport_lowlastauto);
2912                 } else {
2913                         first = MODULE_GLOBAL(ipport_firstauto);
2914                         last = MODULE_GLOBAL(ipport_lastauto);
2915                 }
2916                 if (first > last) {
2917                         uint16_t temp;
2918
2919                         temp = first;
2920                         first = last;
2921                         last = temp;
2922                 }
2923                 count = last - first + 1;       /* number of candidates */
2924                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2925
2926                 done = 0;
2927                 while (!done) {
2928                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
2929                                 done = 1;
2930                         }
2931                         if (!done) {
2932                                 if (--count == 0) {
2933                                         SCTP_INP_DECR_REF(inp);
2934                                         SCTP_INP_WUNLOCK(inp);
2935                                         SCTP_INP_INFO_WUNLOCK();
2936                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2937                                         return (EADDRINUSE);
2938                                 }
2939                                 if (candidate == last)
2940                                         candidate = first;
2941                                 else
2942                                         candidate = candidate + 1;
2943                         }
2944                 }
2945                 lport = htons(candidate);
2946         }
2947         SCTP_INP_DECR_REF(inp);
2948         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2949             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2950                 /*
2951                  * this really should not happen. The guy did a non-blocking
2952                  * bind and then did a close at the same time.
2953                  */
2954                 SCTP_INP_WUNLOCK(inp);
2955                 SCTP_INP_INFO_WUNLOCK();
2956                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2957                 return (EINVAL);
2958         }
2959         /* ok we look clear to give out this port, so lets setup the binding */
2960         if (bindall) {
2961                 /* binding to all addresses, so just set in the proper flags */
2962                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
2963                 /* set the automatic addr changes from kernel flag */
2964                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
2965                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2966                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2967                 } else {
2968                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2969                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2970                 }
2971                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
2972                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2973                 } else {
2974                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2975                 }
2976                 /*
2977                  * set the automatic mobility_base from kernel flag (by
2978                  * micchie)
2979                  */
2980                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
2981                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
2982                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2983                 } else {
2984                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
2985                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2986                 }
2987                 /*
2988                  * set the automatic mobility_fasthandoff from kernel flag
2989                  * (by micchie)
2990                  */
2991                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
2992                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
2993                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2994                 } else {
2995                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
2996                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2997                 }
2998         } else {
2999                 /*
3000                  * bind specific, make sure flags is off and add a new
3001                  * address structure to the sctp_addr_list inside the ep
3002                  * structure.
3003                  *
3004                  * We will need to allocate one and insert it at the head. The
3005                  * socketopt call can just insert new addresses in there as
3006                  * well. It will also have to do the embed scope kame hack
3007                  * too (before adding).
3008                  */
3009                 struct sctp_ifa *ifa;
3010                 struct sockaddr_storage store_sa;
3011
3012                 memset(&store_sa, 0, sizeof(store_sa));
3013                 switch (addr->sa_family) {
3014 #ifdef INET
3015                 case AF_INET:
3016                         {
3017                                 struct sockaddr_in *sin;
3018
3019                                 sin = (struct sockaddr_in *)&store_sa;
3020                                 memcpy(sin, addr, sizeof(struct sockaddr_in));
3021                                 sin->sin_port = 0;
3022                                 break;
3023                         }
3024 #endif
3025 #ifdef INET6
3026                 case AF_INET6:
3027                         {
3028                                 struct sockaddr_in6 *sin6;
3029
3030                                 sin6 = (struct sockaddr_in6 *)&store_sa;
3031                                 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3032                                 sin6->sin6_port = 0;
3033                                 break;
3034                         }
3035 #endif
3036                 default:
3037                         break;
3038                 }
3039                 /*
3040                  * first find the interface with the bound address need to
3041                  * zero out the port to find the address! yuck! can't do
3042                  * this earlier since need port for sctp_pcb_findep()
3043                  */
3044                 if (sctp_ifap != NULL) {
3045                         ifa = sctp_ifap;
3046                 } else {
3047                         /*
3048                          * Note for BSD we hit here always other O/S's will
3049                          * pass things in via the sctp_ifap argument
3050                          * (Panda).
3051                          */
3052                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3053                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3054                 }
3055                 if (ifa == NULL) {
3056                         /* Can't find an interface with that address */
3057                         SCTP_INP_WUNLOCK(inp);
3058                         SCTP_INP_INFO_WUNLOCK();
3059                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3060                         return (EADDRNOTAVAIL);
3061                 }
3062 #ifdef INET6
3063                 if (addr->sa_family == AF_INET6) {
3064                         /* GAK, more FIXME IFA lock? */
3065                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3066                                 /* Can't bind a non-existent addr. */
3067                                 SCTP_INP_WUNLOCK(inp);
3068                                 SCTP_INP_INFO_WUNLOCK();
3069                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3070                                 return (EINVAL);
3071                         }
3072                 }
3073 #endif
3074                 /* we're not bound all */
3075                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3076                 /* allow bindx() to send ASCONF's for binding changes */
3077                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3078                 /* clear automatic addr changes from kernel flag */
3079                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3080
3081                 /* add this address to the endpoint list */
3082                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3083                 if (error != 0) {
3084                         SCTP_INP_WUNLOCK(inp);
3085                         SCTP_INP_INFO_WUNLOCK();
3086                         return (error);
3087                 }
3088                 inp->laddr_count++;
3089         }
3090         /* find the bucket */
3091         if (port_reuse_active) {
3092                 /* Put it into tcp 1-2-1 hash */
3093                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3094                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3095         } else {
3096                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3097         }
3098         /* put it in the bucket */
3099         LIST_INSERT_HEAD(head, inp, sctp_hash);
3100         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3101             (void *)head, ntohs(lport), port_reuse_active);
3102         /* set in the port */
3103         inp->sctp_lport = lport;
3104
3105         /* turn off just the unbound flag */
3106         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3107         SCTP_INP_WUNLOCK(inp);
3108         SCTP_INP_INFO_WUNLOCK();
3109         return (0);
3110 }
3111
3112
3113 static void
3114 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3115 {
3116         struct sctp_iterator *it, *nit;
3117
3118         /*
3119          * We enter with the only the ITERATOR_LOCK in place and a write
3120          * lock on the inp_info stuff.
3121          */
3122         it = sctp_it_ctl.cur_it;
3123         if (it && (it->vn != curvnet)) {
3124                 /* Its not looking at our VNET */
3125                 return;
3126         }
3127         if (it && (it->inp == inp)) {
3128                 /*
3129                  * This is tricky and we hold the iterator lock, but when it
3130                  * returns and gets the lock (when we release it) the
3131                  * iterator will try to operate on inp. We need to stop that
3132                  * from happening. But of course the iterator has a
3133                  * reference on the stcb and inp. We can mark it and it will
3134                  * stop.
3135                  *
3136                  * If its a single iterator situation, we set the end iterator
3137                  * flag. Otherwise we set the iterator to go to the next
3138                  * inp.
3139                  *
3140                  */
3141                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3142                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3143                 } else {
3144                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3145                 }
3146         }
3147         /*
3148          * Now go through and remove any single reference to our inp that
3149          * may be still pending on the list
3150          */
3151         SCTP_IPI_ITERATOR_WQ_LOCK();
3152         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3153                 if (it->vn != curvnet) {
3154                         continue;
3155                 }
3156                 if (it->inp == inp) {
3157                         /* This one points to me is it inp specific? */
3158                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3159                                 /* Remove and free this one */
3160                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3161                                     it, sctp_nxt_itr);
3162                                 if (it->function_atend != NULL) {
3163                                         (*it->function_atend) (it->pointer, it->val);
3164                                 }
3165                                 SCTP_FREE(it, SCTP_M_ITER);
3166                         } else {
3167                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3168                                 if (it->inp) {
3169                                         SCTP_INP_INCR_REF(it->inp);
3170                                 }
3171                         }
3172                         /*
3173                          * When its put in the refcnt is incremented so decr
3174                          * it
3175                          */
3176                         SCTP_INP_DECR_REF(inp);
3177                 }
3178         }
3179         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3180 }
3181
3182 /* release sctp_inpcb unbind the port */
3183 void
3184 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3185 {
3186         /*
3187          * Here we free a endpoint. We must find it (if it is in the Hash
3188          * table) and remove it from there. Then we must also find it in the
3189          * overall list and remove it from there. After all removals are
3190          * complete then any timer has to be stopped. Then start the actual
3191          * freeing. a) Any local lists. b) Any associations. c) The hash of
3192          * all associations. d) finally the ep itself.
3193          */
3194         struct sctp_tcb *asoc, *nasoc;
3195         struct sctp_laddr *laddr, *nladdr;
3196         struct inpcb *ip_pcb;
3197         struct socket *so;
3198         int being_refed = 0;
3199         struct sctp_queued_to_read *sq, *nsq;
3200         int cnt;
3201         sctp_sharedkey_t *shared_key, *nshared_key;
3202
3203
3204 #ifdef SCTP_LOG_CLOSING
3205         sctp_log_closing(inp, NULL, 0);
3206 #endif
3207         SCTP_ITERATOR_LOCK();
3208         /* mark any iterators on the list or being processed */
3209         sctp_iterator_inp_being_freed(inp);
3210         SCTP_ITERATOR_UNLOCK();
3211         so = inp->sctp_socket;
3212         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3213                 /* been here before.. eeks.. get out of here */
3214                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3215 #ifdef SCTP_LOG_CLOSING
3216                 sctp_log_closing(inp, NULL, 1);
3217 #endif
3218                 return;
3219         }
3220         SCTP_ASOC_CREATE_LOCK(inp);
3221         SCTP_INP_INFO_WLOCK();
3222
3223         SCTP_INP_WLOCK(inp);
3224         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3225                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3226                 /* socket is gone, so no more wakeups allowed */
3227                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3228                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3229                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3230
3231         }
3232         /* First time through we have the socket lock, after that no more. */
3233         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3234             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3235
3236         if (inp->control) {
3237                 sctp_m_freem(inp->control);
3238                 inp->control = NULL;
3239         }
3240         if (inp->pkt) {
3241                 sctp_m_freem(inp->pkt);
3242                 inp->pkt = NULL;
3243         }
3244         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3245                                          * here but I will be nice :> (i.e.
3246                                          * ip_pcb = ep;) */
3247         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3248                 int cnt_in_sd;
3249
3250                 cnt_in_sd = 0;
3251                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3252                         SCTP_TCB_LOCK(asoc);
3253                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3254                                 /* Skip guys being freed */
3255                                 cnt_in_sd++;
3256                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3257                                         /*
3258                                          * Special case - we did not start a
3259                                          * kill timer on the asoc due to it
3260                                          * was not closed. So go ahead and
3261                                          * start it now.
3262                                          */
3263                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3264                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3265                                 }
3266                                 SCTP_TCB_UNLOCK(asoc);
3267                                 continue;
3268                         }
3269                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3270                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3271                             (asoc->asoc.total_output_queue_size == 0)) {
3272                                 /*
3273                                  * If we have data in queue, we don't want
3274                                  * to just free since the app may have done,
3275                                  * send()/close or connect/send/close. And
3276                                  * it wants the data to get across first.
3277                                  */
3278                                 /* Just abandon things in the front states */
3279                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3280                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3281                                         cnt_in_sd++;
3282                                 }
3283                                 continue;
3284                         }
3285                         /* Disconnect the socket please */
3286                         asoc->sctp_socket = NULL;
3287                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3288                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3289                             (asoc->asoc.control_pdapi) ||
3290                             (asoc->asoc.size_on_all_streams > 0) ||
3291                             (so && (so->so_rcv.sb_cc > 0))) {
3292                                 /* Left with Data unread */
3293                                 struct mbuf *op_err;
3294
3295                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3296                                     0, M_DONTWAIT, 1, MT_DATA);
3297                                 if (op_err) {
3298                                         /* Fill in the user initiated abort */
3299                                         struct sctp_paramhdr *ph;
3300                                         uint32_t *ippp;
3301
3302                                         SCTP_BUF_LEN(op_err) =
3303                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
3304                                         ph = mtod(op_err,
3305                                             struct sctp_paramhdr *);
3306                                         ph->param_type = htons(
3307                                             SCTP_CAUSE_USER_INITIATED_ABT);
3308                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
3309                                         ippp = (uint32_t *) (ph + 1);
3310                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
3311                                 }
3312                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3313                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3314                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3315                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3316                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3317                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3318                                 }
3319                                 if (sctp_free_assoc(inp, asoc,
3320                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3321                                         cnt_in_sd++;
3322                                 }
3323                                 continue;
3324                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3325                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3326                             (asoc->asoc.stream_queue_cnt == 0)) {
3327                                 if (asoc->asoc.locked_on_sending) {
3328                                         goto abort_anyway;
3329                                 }
3330                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3331                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3332                                         struct sctp_nets *netp;
3333
3334                                         if (asoc->asoc.alternate) {
3335                                                 netp = asoc->asoc.alternate;
3336                                         } else {
3337                                                 netp = asoc->asoc.primary_destination;
3338                                         }
3339                                         /*
3340                                          * there is nothing queued to send,
3341                                          * so I send shutdown
3342                                          */
3343                                         sctp_send_shutdown(asoc, netp);
3344                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3345                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3346                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3347                                         }
3348                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3349                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3350                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3351                                             netp);
3352                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3353                                             asoc->asoc.primary_destination);
3354                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3355                                 }
3356                         } else {
3357                                 /* mark into shutdown pending */
3358                                 struct sctp_stream_queue_pending *sp;
3359
3360                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3361                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3362                                     asoc->asoc.primary_destination);
3363                                 if (asoc->asoc.locked_on_sending) {
3364                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3365                                             sctp_streamhead);
3366                                         if (sp == NULL) {
3367                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3368                                                     (void *)asoc->asoc.locked_on_sending,
3369                                                     asoc->asoc.locked_on_sending->stream_no);
3370                                         } else {
3371                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3372                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3373                                         }
3374                                 }
3375                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3376                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3377                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3378                                         struct mbuf *op_err;
3379
3380                         abort_anyway:
3381                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3382                                             0, M_DONTWAIT, 1, MT_DATA);
3383                                         if (op_err) {
3384                                                 /*
3385                                                  * Fill in the user
3386                                                  * initiated abort
3387                                                  */
3388                                                 struct sctp_paramhdr *ph;
3389                                                 uint32_t *ippp;
3390
3391                                                 SCTP_BUF_LEN(op_err) =
3392                                                     (sizeof(struct sctp_paramhdr) +
3393                                                     sizeof(uint32_t));
3394                                                 ph = mtod(op_err,
3395                                                     struct sctp_paramhdr *);
3396                                                 ph->param_type = htons(
3397                                                     SCTP_CAUSE_USER_INITIATED_ABT);
3398                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3399                                                 ippp = (uint32_t *) (ph + 1);
3400                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
3401                                         }
3402                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3403                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3404                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3405                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3406                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3407                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3408                                         }
3409                                         if (sctp_free_assoc(inp, asoc,
3410                                             SCTP_PCBFREE_NOFORCE,
3411                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3412                                                 cnt_in_sd++;
3413                                         }
3414                                         continue;
3415                                 } else {
3416                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3417                                 }
3418                         }
3419                         cnt_in_sd++;
3420                         SCTP_TCB_UNLOCK(asoc);
3421                 }
3422                 /* now is there some left in our SHUTDOWN state? */
3423                 if (cnt_in_sd) {
3424 #ifdef SCTP_LOG_CLOSING
3425                         sctp_log_closing(inp, NULL, 2);
3426 #endif
3427                         inp->sctp_socket = NULL;
3428                         SCTP_INP_WUNLOCK(inp);
3429                         SCTP_ASOC_CREATE_UNLOCK(inp);
3430                         SCTP_INP_INFO_WUNLOCK();
3431                         return;
3432                 }
3433         }
3434         inp->sctp_socket = NULL;
3435         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3436             SCTP_PCB_FLAGS_UNBOUND) {
3437                 /*
3438                  * ok, this guy has been bound. It's port is somewhere in
3439                  * the SCTP_BASE_INFO(hash table). Remove it!
3440                  */
3441                 LIST_REMOVE(inp, sctp_hash);
3442                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3443         }
3444         /*
3445          * If there is a timer running to kill us, forget it, since it may
3446          * have a contest on the INP lock.. which would cause us to die ...
3447          */
3448         cnt = 0;
3449         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3450                 SCTP_TCB_LOCK(asoc);
3451                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3452                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3453                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3454                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3455                         }
3456                         cnt++;
3457                         SCTP_TCB_UNLOCK(asoc);
3458                         continue;
3459                 }
3460                 /* Free associations that are NOT killing us */
3461                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3462                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3463                         struct mbuf *op_err;
3464                         uint32_t *ippp;
3465
3466                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3467                             0, M_DONTWAIT, 1, MT_DATA);
3468                         if (op_err) {
3469                                 /* Fill in the user initiated abort */
3470                                 struct sctp_paramhdr *ph;
3471
3472                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
3473                                     sizeof(uint32_t));
3474                                 ph = mtod(op_err, struct sctp_paramhdr *);
3475                                 ph->param_type = htons(
3476                                     SCTP_CAUSE_USER_INITIATED_ABT);
3477                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3478                                 ippp = (uint32_t *) (ph + 1);
3479                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
3480
3481                         }
3482                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3483                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3484                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3485                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3486                         cnt++;
3487                         SCTP_TCB_UNLOCK(asoc);
3488                         continue;
3489                 }
3490                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3491                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3492                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3493                 }
3494                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3495                         cnt++;
3496                 }
3497         }
3498         if (cnt) {
3499                 /* Ok we have someone out there that will kill us */
3500                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3501 #ifdef SCTP_LOG_CLOSING
3502                 sctp_log_closing(inp, NULL, 3);
3503 #endif
3504                 SCTP_INP_WUNLOCK(inp);
3505                 SCTP_ASOC_CREATE_UNLOCK(inp);
3506                 SCTP_INP_INFO_WUNLOCK();
3507                 return;
3508         }
3509         if (SCTP_INP_LOCK_CONTENDED(inp))
3510                 being_refed++;
3511         if (SCTP_INP_READ_CONTENDED(inp))
3512                 being_refed++;
3513         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3514                 being_refed++;
3515
3516         if ((inp->refcount) ||
3517             (being_refed) ||
3518             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3519                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3520 #ifdef SCTP_LOG_CLOSING
3521                 sctp_log_closing(inp, NULL, 4);
3522 #endif
3523                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3524                 SCTP_INP_WUNLOCK(inp);
3525                 SCTP_ASOC_CREATE_UNLOCK(inp);
3526                 SCTP_INP_INFO_WUNLOCK();
3527                 return;
3528         }
3529         inp->sctp_ep.signature_change.type = 0;
3530         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3531         /*
3532          * Remove it from the list .. last thing we need a lock for.
3533          */
3534         LIST_REMOVE(inp, sctp_list);
3535         SCTP_INP_WUNLOCK(inp);
3536         SCTP_ASOC_CREATE_UNLOCK(inp);
3537         SCTP_INP_INFO_WUNLOCK();
3538         /*
3539          * Now we release all locks. Since this INP cannot be found anymore
3540          * except possibly by the kill timer that might be running. We call
3541          * the drain function here. It should hit the case were it sees the
3542          * ACTIVE flag cleared and exit out freeing us to proceed and
3543          * destroy everything.
3544          */
3545         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3546                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3547         } else {
3548                 /* Probably un-needed */
3549                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3550         }
3551
3552 #ifdef SCTP_LOG_CLOSING
3553         sctp_log_closing(inp, NULL, 5);
3554 #endif
3555
3556
3557         if ((inp->sctp_asocidhash) != NULL) {
3558                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3559                 inp->sctp_asocidhash = NULL;
3560         }
3561         /* sa_ignore FREED_MEMORY */
3562         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3563                 /* Its only abandoned if it had data left */
3564                 if (sq->length)
3565                         SCTP_STAT_INCR(sctps_left_abandon);
3566
3567                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3568                 sctp_free_remote_addr(sq->whoFrom);
3569                 if (so)
3570                         so->so_rcv.sb_cc -= sq->length;
3571                 if (sq->data) {
3572                         sctp_m_freem(sq->data);
3573                         sq->data = NULL;
3574                 }
3575                 /*
3576                  * no need to free the net count, since at this point all
3577                  * assoc's are gone.
3578                  */
3579                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3580                 SCTP_DECR_READQ_COUNT();
3581         }
3582         /* Now the sctp_pcb things */
3583         /*
3584          * free each asoc if it is not already closed/free. we can't use the
3585          * macro here since le_next will get freed as part of the
3586          * sctp_free_assoc() call.
3587          */
3588         if (so) {
3589 #ifdef IPSEC
3590                 ipsec_delete_pcbpolicy(ip_pcb);
3591 #endif                          /* IPSEC */
3592
3593                 /* Unlocks not needed since the socket is gone now */
3594         }
3595         if (ip_pcb->inp_options) {
3596                 (void)sctp_m_free(ip_pcb->inp_options);
3597                 ip_pcb->inp_options = 0;
3598         }
3599 #ifdef INET6
3600         if (ip_pcb->inp_vflag & INP_IPV6) {
3601                 struct in6pcb *in6p;
3602
3603                 in6p = (struct in6pcb *)inp;
3604                 ip6_freepcbopts(in6p->in6p_outputopts);
3605         }
3606 #endif                          /* INET6 */
3607         ip_pcb->inp_vflag = 0;
3608         /* free up authentication fields */
3609         if (inp->sctp_ep.local_auth_chunks != NULL)
3610                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3611         if (inp->sctp_ep.local_hmacs != NULL)
3612                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3613
3614         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3615                 LIST_REMOVE(shared_key, next);
3616                 sctp_free_sharedkey(shared_key);
3617                 /* sa_ignore FREED_MEMORY */
3618         }
3619
3620         /*
3621          * if we have an address list the following will free the list of
3622          * ifaddr's that are set into this ep. Again macro limitations here,
3623          * since the LIST_FOREACH could be a bad idea.
3624          */
3625         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3626                 sctp_remove_laddr(laddr);
3627         }
3628
3629 #ifdef SCTP_TRACK_FREED_ASOCS
3630         /* TEMP CODE */
3631         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3632                 LIST_REMOVE(asoc, sctp_tcblist);
3633                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3634                 SCTP_DECR_ASOC_COUNT();
3635         }
3636         /* *** END TEMP CODE *** */
3637 #endif
3638         /* Now lets see about freeing the EP hash table. */
3639         if (inp->sctp_tcbhash != NULL) {
3640                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3641                 inp->sctp_tcbhash = NULL;
3642         }
3643         /* Now we must put the ep memory back into the zone pool */
3644         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3645         SCTP_INP_LOCK_DESTROY(inp);
3646         SCTP_INP_READ_DESTROY(inp);
3647         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3648         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3649         SCTP_DECR_EP_COUNT();
3650 }
3651
3652
3653 struct sctp_nets *
3654 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3655 {
3656         struct sctp_nets *net;
3657
3658         /* locate the address */
3659         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3660                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3661                         return (net);
3662         }
3663         return (NULL);
3664 }
3665
3666
3667 int
3668 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3669 {
3670         struct sctp_ifa *sctp_ifa;
3671
3672         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3673         if (sctp_ifa) {
3674                 return (1);
3675         } else {
3676                 return (0);
3677         }
3678 }
3679
3680 /*
3681  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3682  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3683  * stats of stuff.
3684  */
3685 int
3686 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3687     struct sctp_nets **netp, int set_scope, int from)
3688 {
3689         /*
3690          * The following is redundant to the same lines in the
3691          * sctp_aloc_assoc() but is needed since others call the add address
3692          * function
3693          */
3694         struct sctp_nets *net, *netfirst;
3695         int addr_inscope;
3696
3697         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3698             from);
3699         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3700
3701         netfirst = sctp_findnet(stcb, newaddr);
3702         if (netfirst) {
3703                 /*
3704                  * Lie and return ok, we don't want to make the association
3705                  * go away for this behavior. It will happen in the TCP
3706                  * model in a connected socket. It does not reach the hash
3707                  * table until after the association is built so it can't be
3708                  * found. Mark as reachable, since the initial creation will
3709                  * have been cleared and the NOT_IN_ASSOC flag will have
3710                  * been added... and we don't want to end up removing it
3711                  * back out.
3712                  */
3713                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3714                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3715                             SCTP_ADDR_UNCONFIRMED);
3716                 } else {
3717                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3718                 }
3719
3720                 return (0);
3721         }
3722         addr_inscope = 1;
3723         switch (newaddr->sa_family) {
3724 #ifdef INET
3725         case AF_INET:
3726                 {
3727                         struct sockaddr_in *sin;
3728
3729                         sin = (struct sockaddr_in *)newaddr;
3730                         if (sin->sin_addr.s_addr == 0) {
3731                                 /* Invalid address */
3732                                 return (-1);
3733                         }
3734                         /* zero out the bzero area */
3735                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3736
3737                         /* assure len is set */
3738                         sin->sin_len = sizeof(struct sockaddr_in);
3739                         if (set_scope) {
3740 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3741                                 stcb->ipv4_local_scope = 1;
3742 #else
3743                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3744                                         stcb->asoc.ipv4_local_scope = 1;
3745                                 }
3746 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3747                         } else {
3748                                 /* Validate the address is in scope */
3749                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3750                                     (stcb->asoc.ipv4_local_scope == 0)) {
3751                                         addr_inscope = 0;
3752                                 }
3753                         }
3754                         break;
3755                 }
3756 #endif
3757 #ifdef INET6
3758         case AF_INET6:
3759                 {
3760                         struct sockaddr_in6 *sin6;
3761
3762                         sin6 = (struct sockaddr_in6 *)newaddr;
3763                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3764                                 /* Invalid address */
3765                                 return (-1);
3766                         }
3767                         /* assure len is set */
3768                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3769                         if (set_scope) {
3770                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3771                                         stcb->asoc.loopback_scope = 1;
3772                                         stcb->asoc.local_scope = 0;
3773                                         stcb->asoc.ipv4_local_scope = 1;
3774                                         stcb->asoc.site_scope = 1;
3775                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3776                                         /*
3777                                          * If the new destination is a
3778                                          * LINK_LOCAL we must have common
3779                                          * site scope. Don't set the local
3780                                          * scope since we may not share all
3781                                          * links, only loopback can do this.
3782                                          * Links on the local network would
3783                                          * also be on our private network
3784                                          * for v4 too.
3785                                          */
3786                                         stcb->asoc.ipv4_local_scope = 1;
3787                                         stcb->asoc.site_scope = 1;
3788                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3789                                         /*
3790                                          * If the new destination is
3791                                          * SITE_LOCAL then we must have site
3792                                          * scope in common.
3793                                          */
3794                                         stcb->asoc.site_scope = 1;
3795                                 }
3796                         } else {
3797                                 /* Validate the address is in scope */
3798                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3799                                     (stcb->asoc.loopback_scope == 0)) {
3800                                         addr_inscope = 0;
3801                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3802                                     (stcb->asoc.local_scope == 0)) {
3803                                         addr_inscope = 0;
3804                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3805                                     (stcb->asoc.site_scope == 0)) {
3806                                         addr_inscope = 0;
3807                                 }
3808                         }
3809                         break;
3810                 }
3811 #endif
3812         default:
3813                 /* not supported family type */
3814                 return (-1);
3815         }
3816         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3817         if (net == NULL) {
3818                 return (-1);
3819         }
3820         SCTP_INCR_RADDR_COUNT();
3821         bzero(net, sizeof(struct sctp_nets));
3822         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3823         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3824         switch (newaddr->sa_family) {
3825 #ifdef INET
3826         case AF_INET:
3827                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3828                 break;
3829 #endif
3830 #ifdef INET6
3831         case AF_INET6:
3832                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3833                 break;
3834 #endif
3835         default:
3836                 break;
3837         }
3838         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3839         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3840                 stcb->asoc.loopback_scope = 1;
3841                 stcb->asoc.ipv4_local_scope = 1;
3842                 stcb->asoc.local_scope = 0;
3843                 stcb->asoc.site_scope = 1;
3844                 addr_inscope = 1;
3845         }
3846         net->failure_threshold = stcb->asoc.def_net_failure;
3847         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3848         if (addr_inscope == 0) {
3849                 net->dest_state = (SCTP_ADDR_REACHABLE |
3850                     SCTP_ADDR_OUT_OF_SCOPE);
3851         } else {
3852                 if (from == SCTP_ADDR_IS_CONFIRMED)
3853                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3854                         net->dest_state = SCTP_ADDR_REACHABLE;
3855                 else
3856                         net->dest_state = SCTP_ADDR_REACHABLE |
3857                             SCTP_ADDR_UNCONFIRMED;
3858         }
3859         /*
3860          * We set this to 0, the timer code knows that this means its an
3861          * initial value
3862          */
3863         net->rto_needed = 1;
3864         net->RTO = 0;
3865         net->RTO_measured = 0;
3866         stcb->asoc.numnets++;
3867         net->ref_count = 1;
3868         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3869         net->port = stcb->asoc.port;
3870         net->dscp = stcb->asoc.default_dscp;
3871 #ifdef INET6
3872         net->flowlabel = stcb->asoc.default_flowlabel;
3873 #endif
3874         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3875                 net->dest_state |= SCTP_ADDR_NOHB;
3876         } else {
3877                 net->dest_state &= ~SCTP_ADDR_NOHB;
3878         }
3879         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3880                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3881         } else {
3882                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3883         }
3884         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3885         /* Init the timer structure */
3886         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3887         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3888         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3889
3890         /* Now generate a route for this guy */
3891 #ifdef INET6
3892         /* KAME hack: embed scopeid */
3893         if (newaddr->sa_family == AF_INET6) {
3894                 struct sockaddr_in6 *sin6;
3895
3896                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3897                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3898                 sin6->sin6_scope_id = 0;
3899         }
3900 #endif
3901         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3902
3903         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3904                 /* Get source address */
3905                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3906                     stcb,
3907                     (sctp_route_t *) & net->ro,
3908                     net,
3909                     0,
3910                     stcb->asoc.vrf_id);
3911                 /* Now get the interface MTU */
3912                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3913                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3914                 }
3915                 if (net->mtu > 0) {
3916                         uint32_t rmtu;
3917
3918                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3919                         if (rmtu == 0) {
3920                                 /*
3921                                  * Start things off to match mtu of
3922                                  * interface please.
3923                                  */
3924                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3925                                     net->ro.ro_rt, net->mtu);
3926                         } else {
3927                                 /*
3928                                  * we take the route mtu over the interface,
3929                                  * since the route may be leading out the
3930                                  * loopback, or a different interface.
3931                                  */
3932                                 net->mtu = rmtu;
3933                         }
3934                 }
3935         }
3936         if (net->mtu == 0) {
3937                 switch (newaddr->sa_family) {
3938 #ifdef INET
3939                 case AF_INET:
3940                         net->mtu = SCTP_DEFAULT_MTU;
3941                         break;
3942 #endif
3943 #ifdef INET6
3944                 case AF_INET6:
3945                         net->mtu = 1280;
3946                         break;
3947 #endif
3948                 default:
3949                         break;
3950                 }
3951         }
3952         if (net->port) {
3953                 net->mtu -= (uint32_t) sizeof(struct udphdr);
3954         }
3955         if (from == SCTP_ALLOC_ASOC) {
3956                 stcb->asoc.smallest_mtu = net->mtu;
3957         }
3958         if (stcb->asoc.smallest_mtu > net->mtu) {
3959                 stcb->asoc.smallest_mtu = net->mtu;
3960         }
3961 #ifdef INET6
3962         if (newaddr->sa_family == AF_INET6) {
3963                 struct sockaddr_in6 *sin6;
3964
3965                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3966                 (void)sa6_recoverscope(sin6);
3967         }
3968 #endif
3969
3970         /* JRS - Use the congestion control given in the CC module */
3971         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
3972                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
3973
3974         /*
3975          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3976          * of assoc (2005/06/27, iyengar@cis.udel.edu)
3977          */
3978         net->find_pseudo_cumack = 1;
3979         net->find_rtx_pseudo_cumack = 1;
3980         net->src_addr_selected = 0;
3981         /* Choose an initial flowid. */
3982         net->flowid = stcb->asoc.my_vtag ^
3983             ntohs(stcb->rport) ^
3984             ntohs(stcb->sctp_ep->sctp_lport);
3985 #ifdef INVARIANTS
3986         net->flowidset = 1;
3987 #endif
3988         if (netp) {
3989                 *netp = net;
3990         }
3991         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3992         if (net->ro.ro_rt == NULL) {
3993                 /* Since we have no route put it at the back */
3994                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3995         } else if (netfirst == NULL) {
3996                 /* We are the first one in the pool. */
3997                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3998         } else if (netfirst->ro.ro_rt == NULL) {
3999                 /*
4000                  * First one has NO route. Place this one ahead of the first
4001                  * one.
4002                  */
4003                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4004         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4005                 /*
4006                  * This one has a different interface than the one at the
4007                  * top of the list. Place it ahead.
4008                  */
4009                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4010         } else {
4011                 /*
4012                  * Ok we have the same interface as the first one. Move
4013                  * forward until we find either a) one with a NULL route...
4014                  * insert ahead of that b) one with a different ifp.. insert
4015                  * after that. c) end of the list.. insert at the tail.
4016                  */
4017                 struct sctp_nets *netlook;
4018
4019                 do {
4020                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4021                         if (netlook == NULL) {
4022                                 /* End of the list */
4023                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4024                                 break;
4025                         } else if (netlook->ro.ro_rt == NULL) {
4026                                 /* next one has NO route */
4027                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4028                                 break;
4029                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4030                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4031                                     net, sctp_next);
4032                                 break;
4033                         }
4034                         /* Shift forward */
4035                         netfirst = netlook;
4036                 } while (netlook != NULL);
4037         }
4038
4039         /* got to have a primary set */
4040         if (stcb->asoc.primary_destination == 0) {
4041                 stcb->asoc.primary_destination = net;
4042         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4043                     (net->ro.ro_rt) &&
4044             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4045                 /* No route to current primary adopt new primary */
4046                 stcb->asoc.primary_destination = net;
4047         }
4048         /* Validate primary is first */
4049         net = TAILQ_FIRST(&stcb->asoc.nets);
4050         if ((net != stcb->asoc.primary_destination) &&
4051             (stcb->asoc.primary_destination)) {
4052                 /*
4053                  * first one on the list is NOT the primary sctp_cmpaddr()
4054                  * is much more efficient if the primary is the first on the
4055                  * list, make it so.
4056                  */
4057                 TAILQ_REMOVE(&stcb->asoc.nets,
4058                     stcb->asoc.primary_destination, sctp_next);
4059                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4060                     stcb->asoc.primary_destination, sctp_next);
4061         }
4062         return (0);
4063 }
4064
4065
4066 static uint32_t
4067 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4068 {
4069         uint32_t id;
4070         struct sctpasochead *head;
4071         struct sctp_tcb *lstcb;
4072
4073         SCTP_INP_WLOCK(inp);
4074 try_again:
4075         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4076                 /* TSNH */
4077                 SCTP_INP_WUNLOCK(inp);
4078                 return (0);
4079         }
4080         /*
4081          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4082          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4083          */
4084         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4085                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4086         }
4087         id = inp->sctp_associd_counter;
4088         inp->sctp_associd_counter++;
4089         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4090         if (lstcb) {
4091                 goto try_again;
4092         }
4093         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4094         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4095         stcb->asoc.in_asocid_hash = 1;
4096         SCTP_INP_WUNLOCK(inp);
4097         return id;
4098 }
4099
4100 /*
4101  * allocate an association and add it to the endpoint. The caller must be
4102  * careful to add all additional addresses once they are know right away or
4103  * else the assoc will be may experience a blackout scenario.
4104  */
4105 struct sctp_tcb *
4106 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4107     int *error, uint32_t override_tag, uint32_t vrf_id,
4108     struct thread *p
4109 )
4110 {
4111         /* note the p argument is only valid in unbound sockets */
4112
4113         struct sctp_tcb *stcb;
4114         struct sctp_association *asoc;
4115         struct sctpasochead *head;
4116         uint16_t rport;
4117         int err;
4118
4119         /*
4120          * Assumption made here: Caller has done a
4121          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4122          * address does not exist already.
4123          */
4124         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4125                 /* Hit max assoc, sorry no more */
4126                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4127                 *error = ENOBUFS;
4128                 return (NULL);
4129         }
4130         if (firstaddr == NULL) {
4131                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4132                 *error = EINVAL;
4133                 return (NULL);
4134         }
4135         SCTP_INP_RLOCK(inp);
4136         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4137             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4138             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4139                 /*
4140                  * If its in the TCP pool, its NOT allowed to create an
4141                  * association. The parent listener needs to call
4142                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4143                  * off, or connected one does this.. its an error.
4144                  */
4145                 SCTP_INP_RUNLOCK(inp);
4146                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4147                 *error = EINVAL;
4148                 return (NULL);
4149         }
4150         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4151             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4152                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4153                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4154                         SCTP_INP_RUNLOCK(inp);
4155                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4156                         *error = EINVAL;
4157                         return (NULL);
4158                 }
4159         }
4160         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4161 #ifdef SCTP_DEBUG
4162         if (firstaddr) {
4163                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4164                 switch (firstaddr->sa_family) {
4165 #ifdef INET
4166                 case AF_INET:
4167                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4168                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4169                         break;
4170 #endif
4171 #ifdef INET6
4172                 case AF_INET6:
4173                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4174                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4175                         break;
4176 #endif
4177                 default:
4178                         break;
4179                 }
4180         } else {
4181                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4182         }
4183 #endif                          /* SCTP_DEBUG */
4184         switch (firstaddr->sa_family) {
4185 #ifdef INET
4186         case AF_INET:
4187                 {
4188                         struct sockaddr_in *sin;
4189
4190                         sin = (struct sockaddr_in *)firstaddr;
4191                         if ((ntohs(sin->sin_port) == 0) ||
4192                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4193                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4194                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4195                                 /* Invalid address */
4196                                 SCTP_INP_RUNLOCK(inp);
4197                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4198                                 *error = EINVAL;
4199                                 return (NULL);
4200                         }
4201                         rport = sin->sin_port;
4202                         break;
4203                 }
4204 #endif
4205 #ifdef INET6
4206         case AF_INET6:
4207                 {
4208                         struct sockaddr_in6 *sin6;
4209
4210                         sin6 = (struct sockaddr_in6 *)firstaddr;
4211                         if ((ntohs(sin6->sin6_port) == 0) ||
4212                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4213                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4214                                 /* Invalid address */
4215                                 SCTP_INP_RUNLOCK(inp);
4216                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4217                                 *error = EINVAL;
4218                                 return (NULL);
4219                         }
4220                         rport = sin6->sin6_port;
4221                         break;
4222                 }
4223 #endif
4224         default:
4225                 /* not supported family type */
4226                 SCTP_INP_RUNLOCK(inp);
4227                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4228                 *error = EINVAL;
4229                 return (NULL);
4230         }
4231         SCTP_INP_RUNLOCK(inp);
4232         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4233                 /*
4234                  * If you have not performed a bind, then we need to do the
4235                  * ephemeral bind for you.
4236                  */
4237                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4238                     (struct sockaddr *)NULL,
4239                     (struct sctp_ifa *)NULL,
4240                     p
4241                     ))) {
4242                         /* bind error, probably perm */
4243                         *error = err;
4244                         return (NULL);
4245                 }
4246         }
4247         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4248         if (stcb == NULL) {
4249                 /* out of memory? */
4250                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4251                 *error = ENOMEM;
4252                 return (NULL);
4253         }
4254         SCTP_INCR_ASOC_COUNT();
4255
4256         bzero(stcb, sizeof(*stcb));
4257         asoc = &stcb->asoc;
4258
4259         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4260         SCTP_TCB_LOCK_INIT(stcb);
4261         SCTP_TCB_SEND_LOCK_INIT(stcb);
4262         stcb->rport = rport;
4263         /* setup back pointer's */
4264         stcb->sctp_ep = inp;
4265         stcb->sctp_socket = inp->sctp_socket;
4266         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4267                 /* failed */
4268                 SCTP_TCB_LOCK_DESTROY(stcb);
4269                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4270                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4271                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4272                 SCTP_DECR_ASOC_COUNT();
4273                 *error = err;
4274                 return (NULL);
4275         }
4276         /* and the port */
4277         SCTP_INP_INFO_WLOCK();
4278         SCTP_INP_WLOCK(inp);
4279         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4280                 /* inpcb freed while alloc going on */
4281                 SCTP_TCB_LOCK_DESTROY(stcb);
4282                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4283                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4284                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4285                 SCTP_INP_WUNLOCK(inp);
4286                 SCTP_INP_INFO_WUNLOCK();
4287                 SCTP_DECR_ASOC_COUNT();
4288                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4289                 *error = EINVAL;
4290                 return (NULL);
4291         }
4292         SCTP_TCB_LOCK(stcb);
4293
4294         /* now that my_vtag is set, add it to the hash */
4295         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4296         /* put it in the bucket in the vtag hash of assoc's for the system */
4297         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4298         SCTP_INP_INFO_WUNLOCK();
4299
4300         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4301                 /* failure.. memory error? */
4302                 if (asoc->strmout) {
4303                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4304                         asoc->strmout = NULL;
4305                 }
4306                 if (asoc->mapping_array) {
4307                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4308                         asoc->mapping_array = NULL;
4309                 }
4310                 if (asoc->nr_mapping_array) {
4311                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4312                         asoc->nr_mapping_array = NULL;
4313                 }
4314                 SCTP_DECR_ASOC_COUNT();
4315                 SCTP_TCB_LOCK_DESTROY(stcb);
4316                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4317                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4318                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4319                 SCTP_INP_WUNLOCK(inp);
4320                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4321                 *error = ENOBUFS;
4322                 return (NULL);
4323         }
4324         /* Init all the timers */
4325         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4326         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4327         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4328         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4329         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4330         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4331         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4332
4333         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4334         /* now file the port under the hash as well */
4335         if (inp->sctp_tcbhash != NULL) {
4336                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4337                     inp->sctp_hashmark)];
4338                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4339         }
4340         SCTP_INP_WUNLOCK(inp);
4341         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4342         return (stcb);
4343 }
4344
4345
4346 void
4347 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4348 {
4349         struct sctp_association *asoc;
4350
4351         asoc = &stcb->asoc;
4352         asoc->numnets--;
4353         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4354         if (net == asoc->primary_destination) {
4355                 /* Reset primary */
4356                 struct sctp_nets *lnet;
4357
4358                 lnet = TAILQ_FIRST(&asoc->nets);
4359                 /*
4360                  * Mobility adaptation Ideally, if deleted destination is
4361                  * the primary, it becomes a fast retransmission trigger by
4362                  * the subsequent SET PRIMARY. (by micchie)
4363                  */
4364                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4365                     SCTP_MOBILITY_BASE) ||
4366                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4367                     SCTP_MOBILITY_FASTHANDOFF)) {
4368                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4369                         if (asoc->deleted_primary != NULL) {
4370                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4371                                 goto out;
4372                         }
4373                         asoc->deleted_primary = net;
4374                         atomic_add_int(&net->ref_count, 1);
4375                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4376                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4377                         sctp_mobility_feature_on(stcb->sctp_ep,
4378                             SCTP_MOBILITY_PRIM_DELETED);
4379                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4380                             stcb->sctp_ep, stcb, NULL);
4381                 }
4382 out:
4383                 /* Try to find a confirmed primary */
4384                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4385         }
4386         if (net == asoc->last_data_chunk_from) {
4387                 /* Reset primary */
4388                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4389         }
4390         if (net == asoc->last_control_chunk_from) {
4391                 /* Clear net */
4392                 asoc->last_control_chunk_from = NULL;
4393         }
4394         if (net == stcb->asoc.alternate) {
4395                 sctp_free_remote_addr(stcb->asoc.alternate);
4396                 stcb->asoc.alternate = NULL;
4397         }
4398         sctp_free_remote_addr(net);
4399 }
4400
4401 /*
4402  * remove a remote endpoint address from an association, it will fail if the
4403  * address does not exist.
4404  */
4405 int
4406 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4407 {
4408         /*
4409          * Here we need to remove a remote address. This is quite simple, we
4410          * first find it in the list of address for the association
4411          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4412          * on that item. Note we do not allow it to be removed if there are
4413          * no other addresses.
4414          */
4415         struct sctp_association *asoc;
4416         struct sctp_nets *net, *nnet;
4417
4418         asoc = &stcb->asoc;
4419
4420         /* locate the address */
4421         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4422                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4423                         continue;
4424                 }
4425                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4426                     remaddr)) {
4427                         /* we found the guy */
4428                         if (asoc->numnets < 2) {
4429                                 /* Must have at LEAST two remote addresses */
4430                                 return (-1);
4431                         } else {
4432                                 sctp_remove_net(stcb, net);
4433                                 return (0);
4434                         }
4435                 }
4436         }
4437         /* not found. */
4438         return (-2);
4439 }
4440
4441 void
4442 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4443 {
4444         struct sctpvtaghead *chain;
4445         struct sctp_tagblock *twait_block;
4446         int found = 0;
4447         int i;
4448
4449         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4450         if (!LIST_EMPTY(chain)) {
4451                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4452                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4453                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4454                                     (twait_block->vtag_block[i].lport == lport) &&
4455                                     (twait_block->vtag_block[i].rport == rport)) {
4456                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4457                                         twait_block->vtag_block[i].v_tag = 0;
4458                                         twait_block->vtag_block[i].lport = 0;
4459                                         twait_block->vtag_block[i].rport = 0;
4460                                         found = 1;
4461                                         break;
4462                                 }
4463                         }
4464                         if (found)
4465                                 break;
4466                 }
4467         }
4468 }
4469
4470 int
4471 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4472 {
4473         struct sctpvtaghead *chain;
4474         struct sctp_tagblock *twait_block;
4475         int found = 0;
4476         int i;
4477
4478         SCTP_INP_INFO_WLOCK();
4479         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4480         if (!LIST_EMPTY(chain)) {
4481                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4482                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4483                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4484                                     (twait_block->vtag_block[i].lport == lport) &&
4485                                     (twait_block->vtag_block[i].rport == rport)) {
4486                                         found = 1;
4487                                         break;
4488                                 }
4489                         }
4490                         if (found)
4491                                 break;
4492                 }
4493         }
4494         SCTP_INP_INFO_WUNLOCK();
4495         return (found);
4496 }
4497
4498
4499 void
4500 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4501 {
4502         struct sctpvtaghead *chain;
4503         struct sctp_tagblock *twait_block;
4504         struct timeval now;
4505         int set, i;
4506
4507         if (time == 0) {
4508                 /* Its disabled */
4509                 return;
4510         }
4511         (void)SCTP_GETTIME_TIMEVAL(&now);
4512         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4513         set = 0;
4514         if (!LIST_EMPTY(chain)) {
4515                 /* Block(s) present, lets find space, and expire on the fly */
4516                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4517                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4518                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
4519                                     !set) {
4520                                         twait_block->vtag_block[i].tv_sec_at_expire =
4521                                             now.tv_sec + time;
4522                                         twait_block->vtag_block[i].v_tag = tag;
4523                                         twait_block->vtag_block[i].lport = lport;
4524                                         twait_block->vtag_block[i].rport = rport;
4525                                         set = 1;
4526                                 } else if ((twait_block->vtag_block[i].v_tag) &&
4527                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4528                                         /* Audit expires this guy */
4529                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4530                                         twait_block->vtag_block[i].v_tag = 0;
4531                                         twait_block->vtag_block[i].lport = 0;
4532                                         twait_block->vtag_block[i].rport = 0;
4533                                         if (set == 0) {
4534                                                 /* Reuse it for my new tag */
4535                                                 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4536                                                 twait_block->vtag_block[i].v_tag = tag;
4537                                                 twait_block->vtag_block[i].lport = lport;
4538                                                 twait_block->vtag_block[i].rport = rport;
4539                                                 set = 1;
4540                                         }
4541                                 }
4542                         }
4543                         if (set) {
4544                                 /*
4545                                  * We only do up to the block where we can
4546                                  * place our tag for audits
4547                                  */
4548                                 break;
4549                         }
4550                 }
4551         }
4552         /* Need to add a new block to chain */
4553         if (!set) {
4554                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4555                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4556                 if (twait_block == NULL) {
4557 #ifdef INVARIANTS
4558                         panic("Can not alloc tagblock");
4559 #endif
4560                         return;
4561                 }
4562                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4563                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4564                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4565                 twait_block->vtag_block[0].v_tag = tag;
4566                 twait_block->vtag_block[0].lport = lport;
4567                 twait_block->vtag_block[0].rport = rport;
4568         }
4569 }
4570
4571
4572
4573 /*-
4574  * Free the association after un-hashing the remote port. This
4575  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4576  * expect that the input to this function IS a locked TCB.
4577  * It will return 0, if it did NOT destroy the association (instead
4578  * it unlocks it. It will return NON-zero if it either destroyed the
4579  * association OR the association is already destroyed.
4580  */
4581 int
4582 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4583 {
4584         int i;
4585         struct sctp_association *asoc;
4586         struct sctp_nets *net, *nnet;
4587         struct sctp_laddr *laddr, *naddr;
4588         struct sctp_tmit_chunk *chk, *nchk;
4589         struct sctp_asconf_addr *aparam, *naparam;
4590         struct sctp_asconf_ack *aack, *naack;
4591         struct sctp_stream_reset_list *strrst, *nstrrst;
4592         struct sctp_queued_to_read *sq, *nsq;
4593         struct sctp_stream_queue_pending *sp, *nsp;
4594         sctp_sharedkey_t *shared_key, *nshared_key;
4595         struct socket *so;
4596
4597         /* first, lets purge the entry from the hash table. */
4598
4599 #ifdef SCTP_LOG_CLOSING
4600         sctp_log_closing(inp, stcb, 6);
4601 #endif
4602         if (stcb->asoc.state == 0) {
4603 #ifdef SCTP_LOG_CLOSING
4604                 sctp_log_closing(inp, NULL, 7);
4605 #endif
4606                 /* there is no asoc, really TSNH :-0 */
4607                 return (1);
4608         }
4609         if (stcb->asoc.alternate) {
4610                 sctp_free_remote_addr(stcb->asoc.alternate);
4611                 stcb->asoc.alternate = NULL;
4612         }
4613         /* TEMP CODE */
4614         if (stcb->freed_from_where == 0) {
4615                 /* Only record the first place free happened from */
4616                 stcb->freed_from_where = from_location;
4617         }
4618         /* TEMP CODE */
4619
4620         asoc = &stcb->asoc;
4621         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4622             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4623                 /* nothing around */
4624                 so = NULL;
4625         else
4626                 so = inp->sctp_socket;
4627
4628         /*
4629          * We used timer based freeing if a reader or writer is in the way.
4630          * So we first check if we are actually being called from a timer,
4631          * if so we abort early if a reader or writer is still in the way.
4632          */
4633         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4634             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4635                 /*
4636                  * is it the timer driving us? if so are the reader/writers
4637                  * gone?
4638                  */
4639                 if (stcb->asoc.refcnt) {
4640                         /* nope, reader or writer in the way */
4641                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4642                         /* no asoc destroyed */
4643                         SCTP_TCB_UNLOCK(stcb);
4644 #ifdef SCTP_LOG_CLOSING
4645                         sctp_log_closing(inp, stcb, 8);
4646 #endif
4647                         return (0);
4648                 }
4649         }
4650         /* now clean up any other timers */
4651         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4652         asoc->dack_timer.self = NULL;
4653         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4654         /*-
4655          * For stream reset we don't blast this unless
4656          * it is a str-reset timer, it might be the
4657          * free-asoc timer which we DON'T want to
4658          * disturb.
4659          */
4660         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4661                 asoc->strreset_timer.self = NULL;
4662         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4663         asoc->asconf_timer.self = NULL;
4664         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4665         asoc->autoclose_timer.self = NULL;
4666         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4667         asoc->shut_guard_timer.self = NULL;
4668         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4669         asoc->delayed_event_timer.self = NULL;
4670         /* Mobility adaptation */
4671         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4672         asoc->delete_prim_timer.self = NULL;
4673         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4674                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4675                 net->rxt_timer.self = NULL;
4676                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4677                 net->pmtu_timer.self = NULL;
4678                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4679                 net->hb_timer.self = NULL;
4680         }
4681         /* Now the read queue needs to be cleaned up (only once) */
4682         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4683                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4684                 SCTP_INP_READ_LOCK(inp);
4685                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4686                         if (sq->stcb == stcb) {
4687                                 sq->do_not_ref_stcb = 1;
4688                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4689                                 /*
4690                                  * If there is no end, there never will be
4691                                  * now.
4692                                  */
4693                                 if (sq->end_added == 0) {
4694                                         /* Held for PD-API clear that. */
4695                                         sq->pdapi_aborted = 1;
4696                                         sq->held_length = 0;
4697                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4698                                                 /*
4699                                                  * Need to add a PD-API
4700                                                  * aborted indication.
4701                                                  * Setting the control_pdapi
4702                                                  * assures that it will be
4703                                                  * added right after this
4704                                                  * msg.
4705                                                  */
4706                                                 uint32_t strseq;
4707
4708                                                 stcb->asoc.control_pdapi = sq;
4709                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4710                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4711                                                     stcb,
4712                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4713                                                     (void *)&strseq,
4714                                                     SCTP_SO_LOCKED);
4715                                                 stcb->asoc.control_pdapi = NULL;
4716                                         }
4717                                 }
4718                                 /* Add an end to wake them */
4719                                 sq->end_added = 1;
4720                         }
4721                 }
4722                 SCTP_INP_READ_UNLOCK(inp);
4723                 if (stcb->block_entry) {
4724                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4725                         stcb->block_entry->error = ECONNRESET;
4726                         stcb->block_entry = NULL;
4727                 }
4728         }
4729         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4730                 /*
4731                  * Someone holds a reference OR the socket is unaccepted
4732                  * yet.
4733                  */
4734                 if ((stcb->asoc.refcnt) ||
4735                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4736                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4737                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4738                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4739                 }
4740                 SCTP_TCB_UNLOCK(stcb);
4741                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4742                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4743                         /* nothing around */
4744                         so = NULL;
4745                 if (so) {
4746                         /* Wake any reader/writers */
4747                         sctp_sorwakeup(inp, so);
4748                         sctp_sowwakeup(inp, so);
4749                 }
4750 #ifdef SCTP_LOG_CLOSING
4751                 sctp_log_closing(inp, stcb, 9);
4752 #endif
4753                 /* no asoc destroyed */
4754                 return (0);
4755         }
4756 #ifdef SCTP_LOG_CLOSING
4757         sctp_log_closing(inp, stcb, 10);
4758 #endif
4759         /*
4760          * When I reach here, no others want to kill the assoc yet.. and I
4761          * own the lock. Now its possible an abort comes in when I do the
4762          * lock exchange below to grab all the locks to do the final take
4763          * out. to prevent this we increment the count, which will start a
4764          * timer and blow out above thus assuring us that we hold exclusive
4765          * killing of the asoc. Note that after getting back the TCB lock we
4766          * will go ahead and increment the counter back up and stop any
4767          * timer a passing stranger may have started :-S
4768          */
4769         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4770                 atomic_add_int(&stcb->asoc.refcnt, 1);
4771
4772                 SCTP_TCB_UNLOCK(stcb);
4773                 SCTP_INP_INFO_WLOCK();
4774                 SCTP_INP_WLOCK(inp);
4775                 SCTP_TCB_LOCK(stcb);
4776         }
4777         /* Double check the GONE flag */
4778         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4779             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4780                 /* nothing around */
4781                 so = NULL;
4782
4783         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4784             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4785                 /*
4786                  * For TCP type we need special handling when we are
4787                  * connected. We also include the peel'ed off ones to.
4788                  */
4789                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4790                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4791                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4792                         if (so) {
4793                                 SOCK_LOCK(so);
4794                                 if (so->so_rcv.sb_cc == 0) {
4795                                         so->so_state &= ~(SS_ISCONNECTING |
4796                                             SS_ISDISCONNECTING |
4797                                             SS_ISCONFIRMING |
4798                                             SS_ISCONNECTED);
4799                                 }
4800                                 socantrcvmore_locked(so);
4801                                 sctp_sowwakeup(inp, so);
4802                                 sctp_sorwakeup(inp, so);
4803                                 SCTP_SOWAKEUP(so);
4804                         }
4805                 }
4806         }
4807         /*
4808          * Make it invalid too, that way if its about to run it will abort
4809          * and return.
4810          */
4811         /* re-increment the lock */
4812         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4813                 atomic_add_int(&stcb->asoc.refcnt, -1);
4814         }
4815         if (stcb->asoc.refcnt) {
4816                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4817                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4818                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4819                         SCTP_INP_INFO_WUNLOCK();
4820                         SCTP_INP_WUNLOCK(inp);
4821                 }
4822                 SCTP_TCB_UNLOCK(stcb);
4823                 return (0);
4824         }
4825         asoc->state = 0;
4826         if (inp->sctp_tcbhash) {
4827                 LIST_REMOVE(stcb, sctp_tcbhash);
4828         }
4829         if (stcb->asoc.in_asocid_hash) {
4830                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4831         }
4832         /* Now lets remove it from the list of ALL associations in the EP */
4833         LIST_REMOVE(stcb, sctp_tcblist);
4834         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4835                 SCTP_INP_INCR_REF(inp);
4836                 SCTP_INP_WUNLOCK(inp);
4837         }
4838         /* pull from vtag hash */
4839         LIST_REMOVE(stcb, sctp_asocs);
4840         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4841             inp->sctp_lport, stcb->rport);
4842
4843         /*
4844          * Now restop the timers to be sure this is paranoia at is finest!
4845          */
4846         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4847         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4848         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4849         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4850         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4851         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4852         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4853         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4854                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4855                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4856                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4857         }
4858
4859         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4860         /*
4861          * The chunk lists and such SHOULD be empty but we check them just
4862          * in case.
4863          */
4864         /* anything on the wheel needs to be removed */
4865         for (i = 0; i < asoc->streamoutcnt; i++) {
4866                 struct sctp_stream_out *outs;
4867
4868                 outs = &asoc->strmout[i];
4869                 /* now clean up any chunks here */
4870                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4871                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4872                         sctp_free_spbufspace(stcb, asoc, sp);
4873                         if (sp->data) {
4874                                 if (so) {
4875                                         /* Still an open socket - report */
4876                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4877                                             0, (void *)sp, SCTP_SO_LOCKED);
4878                                 }
4879                                 if (sp->data) {
4880                                         sctp_m_freem(sp->data);
4881                                         sp->data = NULL;
4882                                         sp->tail_mbuf = NULL;
4883                                         sp->length = 0;
4884                                 }
4885                         }
4886                         if (sp->net) {
4887                                 sctp_free_remote_addr(sp->net);
4888                                 sp->net = NULL;
4889                         }
4890                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4891                 }
4892         }
4893         /* sa_ignore FREED_MEMORY */
4894         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4895                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4896                 SCTP_FREE(strrst, SCTP_M_STRESET);
4897         }
4898         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4899                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4900                 if (sq->data) {
4901                         sctp_m_freem(sq->data);
4902                         sq->data = NULL;
4903                 }
4904                 sctp_free_remote_addr(sq->whoFrom);
4905                 sq->whoFrom = NULL;
4906                 sq->stcb = NULL;
4907                 /* Free the ctl entry */
4908                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4909                 SCTP_DECR_READQ_COUNT();
4910                 /* sa_ignore FREED_MEMORY */
4911         }
4912         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4913                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4914                 if (chk->data) {
4915                         sctp_m_freem(chk->data);
4916                         chk->data = NULL;
4917                 }
4918                 if (chk->holds_key_ref)
4919                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4920                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4921                 SCTP_DECR_CHK_COUNT();
4922                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4923                 asoc->free_chunk_cnt--;
4924                 /* sa_ignore FREED_MEMORY */
4925         }
4926         /* pending send queue SHOULD be empty */
4927         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4928                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4929                 if (chk->data) {
4930                         if (so) {
4931                                 /* Still a socket? */
4932                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
4933                                     0, chk, SCTP_SO_LOCKED);
4934                         }
4935                         if (chk->data) {
4936                                 sctp_m_freem(chk->data);
4937                                 chk->data = NULL;
4938                         }
4939                 }
4940                 if (chk->holds_key_ref)
4941                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4942                 if (chk->whoTo) {
4943                         sctp_free_remote_addr(chk->whoTo);
4944                         chk->whoTo = NULL;
4945                 }
4946                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4947                 SCTP_DECR_CHK_COUNT();
4948                 /* sa_ignore FREED_MEMORY */
4949         }
4950         /* sent queue SHOULD be empty */
4951         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
4952                 if (chk->sent != SCTP_DATAGRAM_NR_MARKED) {
4953                         if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
4954                                 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
4955 #ifdef INVARIANTS
4956                         } else {
4957                                 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
4958 #endif
4959                         }
4960                 }
4961                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4962                 if (chk->data) {
4963                         if (so) {
4964                                 /* Still a socket? */
4965                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
4966                                     0, chk, SCTP_SO_LOCKED);
4967                         }
4968                         if (chk->data) {
4969                                 sctp_m_freem(chk->data);
4970                                 chk->data = NULL;
4971                         }
4972                 }
4973                 if (chk->holds_key_ref)
4974                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4975                 sctp_free_remote_addr(chk->whoTo);
4976                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4977                 SCTP_DECR_CHK_COUNT();
4978                 /* sa_ignore FREED_MEMORY */
4979         }
4980         /* control queue MAY not be empty */
4981         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
4982                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4983                 if (chk->data) {
4984                         sctp_m_freem(chk->data);
4985                         chk->data = NULL;
4986                 }
4987                 if (chk->holds_key_ref)
4988                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4989                 sctp_free_remote_addr(chk->whoTo);
4990                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4991                 SCTP_DECR_CHK_COUNT();
4992                 /* sa_ignore FREED_MEMORY */
4993         }
4994         /* ASCONF queue MAY not be empty */
4995         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
4996                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
4997                 if (chk->data) {
4998                         sctp_m_freem(chk->data);
4999                         chk->data = NULL;
5000                 }
5001                 if (chk->holds_key_ref)
5002                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5003                 sctp_free_remote_addr(chk->whoTo);
5004                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5005                 SCTP_DECR_CHK_COUNT();
5006                 /* sa_ignore FREED_MEMORY */
5007         }
5008         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5009                 TAILQ_REMOVE(&asoc->reasmqueue, 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
5022         if (asoc->mapping_array) {
5023                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5024                 asoc->mapping_array = NULL;
5025         }
5026         if (asoc->nr_mapping_array) {
5027                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5028                 asoc->nr_mapping_array = NULL;
5029         }
5030         /* the stream outs */
5031         if (asoc->strmout) {
5032                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5033                 asoc->strmout = NULL;
5034         }
5035         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5036         if (asoc->strmin) {
5037                 struct sctp_queued_to_read *ctl, *nctl;
5038
5039                 for (i = 0; i < asoc->streamincnt; i++) {
5040                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5041                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5042                                 sctp_free_remote_addr(ctl->whoFrom);
5043                                 if (ctl->data) {
5044                                         sctp_m_freem(ctl->data);
5045                                         ctl->data = NULL;
5046                                 }
5047                                 /*
5048                                  * We don't free the address here since all
5049                                  * the net's were freed above.
5050                                  */
5051                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5052                                 SCTP_DECR_READQ_COUNT();
5053                         }
5054                 }
5055                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5056                 asoc->strmin = NULL;
5057         }
5058         asoc->streamincnt = 0;
5059         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5060 #ifdef INVARIANTS
5061                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5062                         panic("no net's left alloc'ed, or list points to itself");
5063                 }
5064 #endif
5065                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5066                 sctp_free_remote_addr(net);
5067         }
5068         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5069                 /* sa_ignore FREED_MEMORY */
5070                 sctp_remove_laddr(laddr);
5071         }
5072
5073         /* pending asconf (address) parameters */
5074         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5075                 /* sa_ignore FREED_MEMORY */
5076                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5077                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5078         }
5079         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5080                 /* sa_ignore FREED_MEMORY */
5081                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5082                 if (aack->data != NULL) {
5083                         sctp_m_freem(aack->data);
5084                 }
5085                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5086         }
5087         /* clean up auth stuff */
5088         if (asoc->local_hmacs)
5089                 sctp_free_hmaclist(asoc->local_hmacs);
5090         if (asoc->peer_hmacs)
5091                 sctp_free_hmaclist(asoc->peer_hmacs);
5092
5093         if (asoc->local_auth_chunks)
5094                 sctp_free_chunklist(asoc->local_auth_chunks);
5095         if (asoc->peer_auth_chunks)
5096                 sctp_free_chunklist(asoc->peer_auth_chunks);
5097
5098         sctp_free_authinfo(&asoc->authinfo);
5099
5100         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5101                 LIST_REMOVE(shared_key, next);
5102                 sctp_free_sharedkey(shared_key);
5103                 /* sa_ignore FREED_MEMORY */
5104         }
5105
5106         /* Insert new items here :> */
5107
5108         /* Get rid of LOCK */
5109         SCTP_TCB_LOCK_DESTROY(stcb);
5110         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5111         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5112                 SCTP_INP_INFO_WUNLOCK();
5113                 SCTP_INP_RLOCK(inp);
5114         }
5115 #ifdef SCTP_TRACK_FREED_ASOCS
5116         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5117                 /* now clean up the tasoc itself */
5118                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5119                 SCTP_DECR_ASOC_COUNT();
5120         } else {
5121                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5122         }
5123 #else
5124         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5125         SCTP_DECR_ASOC_COUNT();
5126 #endif
5127         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5128                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5129                         /*
5130                          * If its NOT the inp_free calling us AND sctp_close
5131                          * as been called, we call back...
5132                          */
5133                         SCTP_INP_RUNLOCK(inp);
5134                         /*
5135                          * This will start the kill timer (if we are the
5136                          * last one) since we hold an increment yet. But
5137                          * this is the only safe way to do this since
5138                          * otherwise if the socket closes at the same time
5139                          * we are here we might collide in the cleanup.
5140                          */
5141                         sctp_inpcb_free(inp,
5142                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5143                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5144                         SCTP_INP_DECR_REF(inp);
5145                         goto out_of;
5146                 } else {
5147                         /* The socket is still open. */
5148                         SCTP_INP_DECR_REF(inp);
5149                 }
5150         }
5151         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5152                 SCTP_INP_RUNLOCK(inp);
5153         }
5154 out_of:
5155         /* destroyed the asoc */
5156 #ifdef SCTP_LOG_CLOSING
5157         sctp_log_closing(inp, NULL, 11);
5158 #endif
5159         return (1);
5160 }
5161
5162
5163
5164 /*
5165  * determine if a destination is "reachable" based upon the addresses bound
5166  * to the current endpoint (e.g. only v4 or v6 currently bound)
5167  */
5168 /*
5169  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5170  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5171  * types bound as its endpoint
5172  */
5173 int
5174 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5175 {
5176         struct sctp_inpcb *inp;
5177         int answer;
5178
5179         /*
5180          * No locks here, the TCB, in all cases is already locked and an
5181          * assoc is up. There is either a INP lock by the caller applied (in
5182          * asconf case when deleting an address) or NOT in the HB case,
5183          * however if HB then the INP increment is up and the INP will not
5184          * be removed (on top of the fact that we have a TCB lock). So we
5185          * only want to read the sctp_flags, which is either bound-all or
5186          * not.. no protection needed since once an assoc is up you can't be
5187          * changing your binding.
5188          */
5189         inp = stcb->sctp_ep;
5190         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5191                 /* if bound all, destination is not restricted */
5192                 /*
5193                  * RRS: Question during lock work: Is this correct? If you
5194                  * are bound-all you still might need to obey the V4--V6
5195                  * flags??? IMO this bound-all stuff needs to be removed!
5196                  */
5197                 return (1);
5198         }
5199         /* NOTE: all "scope" checks are done when local addresses are added */
5200         switch (destaddr->sa_family) {
5201 #ifdef INET6
5202         case AF_INET6:
5203                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5204                 break;
5205 #endif
5206 #ifdef INET
5207         case AF_INET:
5208                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5209                 break;
5210 #endif
5211         default:
5212                 /* invalid family, so it's unreachable */
5213                 answer = 0;
5214                 break;
5215         }
5216         return (answer);
5217 }
5218
5219 /*
5220  * update the inp_vflags on an endpoint
5221  */
5222 static void
5223 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5224 {
5225         struct sctp_laddr *laddr;
5226
5227         /* first clear the flag */
5228         inp->ip_inp.inp.inp_vflag = 0;
5229         /* set the flag based on addresses on the ep list */
5230         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5231                 if (laddr->ifa == NULL) {
5232                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5233                             __FUNCTION__);
5234                         continue;
5235                 }
5236                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5237                         continue;
5238                 }
5239                 switch (laddr->ifa->address.sa.sa_family) {
5240 #ifdef INET6
5241                 case AF_INET6:
5242                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5243                         break;
5244 #endif
5245 #ifdef INET
5246                 case AF_INET:
5247                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5248                         break;
5249 #endif
5250                 default:
5251                         break;
5252                 }
5253         }
5254 }
5255
5256 /*
5257  * Add the address to the endpoint local address list There is nothing to be
5258  * done if we are bound to all addresses
5259  */
5260 void
5261 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5262 {
5263         struct sctp_laddr *laddr;
5264         int fnd, error = 0;
5265
5266         fnd = 0;
5267
5268         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5269                 /* You are already bound to all. You have it already */
5270                 return;
5271         }
5272 #ifdef INET6
5273         if (ifa->address.sa.sa_family == AF_INET6) {
5274                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5275                         /* Can't bind a non-useable addr. */
5276                         return;
5277                 }
5278         }
5279 #endif
5280         /* first, is it already present? */
5281         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5282                 if (laddr->ifa == ifa) {
5283                         fnd = 1;
5284                         break;
5285                 }
5286         }
5287
5288         if (fnd == 0) {
5289                 /* Not in the ep list */
5290                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5291                 if (error != 0)
5292                         return;
5293                 inp->laddr_count++;
5294                 /* update inp_vflag flags */
5295                 switch (ifa->address.sa.sa_family) {
5296 #ifdef INET6
5297                 case AF_INET6:
5298                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5299                         break;
5300 #endif
5301 #ifdef INET
5302                 case AF_INET:
5303                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5304                         break;
5305 #endif
5306                 default:
5307                         break;
5308                 }
5309         }
5310         return;
5311 }
5312
5313
5314 /*
5315  * select a new (hopefully reachable) destination net (should only be used
5316  * when we deleted an ep addr that is the only usable source address to reach
5317  * the destination net)
5318  */
5319 static void
5320 sctp_select_primary_destination(struct sctp_tcb *stcb)
5321 {
5322         struct sctp_nets *net;
5323
5324         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5325                 /* for now, we'll just pick the first reachable one we find */
5326                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5327                         continue;
5328                 if (sctp_destination_is_reachable(stcb,
5329                     (struct sockaddr *)&net->ro._l_addr)) {
5330                         /* found a reachable destination */
5331                         stcb->asoc.primary_destination = net;
5332                 }
5333         }
5334         /* I can't there from here! ...we're gonna die shortly... */
5335 }
5336
5337
5338 /*
5339  * Delete the address from the endpoint local address list There is nothing
5340  * to be done if we are bound to all addresses
5341  */
5342 void
5343 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5344 {
5345         struct sctp_laddr *laddr;
5346         int fnd;
5347
5348         fnd = 0;
5349         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5350                 /* You are already bound to all. You have it already */
5351                 return;
5352         }
5353         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5354                 if (laddr->ifa == ifa) {
5355                         fnd = 1;
5356                         break;
5357                 }
5358         }
5359         if (fnd && (inp->laddr_count < 2)) {
5360                 /* can't delete unless there are at LEAST 2 addresses */
5361                 return;
5362         }
5363         if (fnd) {
5364                 /*
5365                  * clean up any use of this address go through our
5366                  * associations and clear any last_used_address that match
5367                  * this one for each assoc, see if a new primary_destination
5368                  * is needed
5369                  */
5370                 struct sctp_tcb *stcb;
5371
5372                 /* clean up "next_addr_touse" */
5373                 if (inp->next_addr_touse == laddr)
5374                         /* delete this address */
5375                         inp->next_addr_touse = NULL;
5376
5377                 /* clean up "last_used_address" */
5378                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5379                         struct sctp_nets *net;
5380
5381                         SCTP_TCB_LOCK(stcb);
5382                         if (stcb->asoc.last_used_address == laddr)
5383                                 /* delete this address */
5384                                 stcb->asoc.last_used_address = NULL;
5385                         /*
5386                          * Now spin through all the nets and purge any ref
5387                          * to laddr
5388                          */
5389                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5390                                 if (net->ro._s_addr &&
5391                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5392                                         /* Yep, purge src address selected */
5393                                         sctp_rtentry_t *rt;
5394
5395                                         /* delete this address if cached */
5396                                         rt = net->ro.ro_rt;
5397                                         if (rt != NULL) {
5398                                                 RTFREE(rt);
5399                                                 net->ro.ro_rt = NULL;
5400                                         }
5401                                         sctp_free_ifa(net->ro._s_addr);
5402                                         net->ro._s_addr = NULL;
5403                                         net->src_addr_selected = 0;
5404                                 }
5405                         }
5406                         SCTP_TCB_UNLOCK(stcb);
5407                 }               /* for each tcb */
5408                 /* remove it from the ep list */
5409                 sctp_remove_laddr(laddr);
5410                 inp->laddr_count--;
5411                 /* update inp_vflag flags */
5412                 sctp_update_ep_vflag(inp);
5413         }
5414         return;
5415 }
5416
5417 /*
5418  * Add the address to the TCB local address restricted list.
5419  * This is a "pending" address list (eg. addresses waiting for an
5420  * ASCONF-ACK response) and cannot be used as a valid source address.
5421  */
5422 void
5423 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5424 {
5425         struct sctp_laddr *laddr;
5426         struct sctpladdr *list;
5427
5428         /*
5429          * Assumes TCB is locked.. and possibly the INP. May need to
5430          * confirm/fix that if we need it and is not the case.
5431          */
5432         list = &stcb->asoc.sctp_restricted_addrs;
5433
5434 #ifdef INET6
5435         if (ifa->address.sa.sa_family == AF_INET6) {
5436                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5437                         /* Can't bind a non-existent addr. */
5438                         return;
5439                 }
5440         }
5441 #endif
5442         /* does the address already exist? */
5443         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5444                 if (laddr->ifa == ifa) {
5445                         return;
5446                 }
5447         }
5448
5449         /* add to the list */
5450         (void)sctp_insert_laddr(list, ifa, 0);
5451         return;
5452 }
5453
5454 /*
5455  * insert an laddr entry with the given ifa for the desired list
5456  */
5457 int
5458 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5459 {
5460         struct sctp_laddr *laddr;
5461
5462         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5463         if (laddr == NULL) {
5464                 /* out of memory? */
5465                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5466                 return (EINVAL);
5467         }
5468         SCTP_INCR_LADDR_COUNT();
5469         bzero(laddr, sizeof(*laddr));
5470         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5471         laddr->ifa = ifa;
5472         laddr->action = act;
5473         atomic_add_int(&ifa->refcount, 1);
5474         /* insert it */
5475         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5476
5477         return (0);
5478 }
5479
5480 /*
5481  * Remove an laddr entry from the local address list (on an assoc)
5482  */
5483 void
5484 sctp_remove_laddr(struct sctp_laddr *laddr)
5485 {
5486
5487         /* remove from the list */
5488         LIST_REMOVE(laddr, sctp_nxt_addr);
5489         sctp_free_ifa(laddr->ifa);
5490         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5491         SCTP_DECR_LADDR_COUNT();
5492 }
5493
5494 /*
5495  * Remove a local address from the TCB local address restricted list
5496  */
5497 void
5498 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5499 {
5500         struct sctp_inpcb *inp;
5501         struct sctp_laddr *laddr;
5502
5503         /*
5504          * This is called by asconf work. It is assumed that a) The TCB is
5505          * locked and b) The INP is locked. This is true in as much as I can
5506          * trace through the entry asconf code where I did these locks.
5507          * Again, the ASCONF code is a bit different in that it does lock
5508          * the INP during its work often times. This must be since we don't
5509          * want other proc's looking up things while what they are looking
5510          * up is changing :-D
5511          */
5512
5513         inp = stcb->sctp_ep;
5514         /* if subset bound and don't allow ASCONF's, can't delete last */
5515         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5516             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5517                 if (stcb->sctp_ep->laddr_count < 2) {
5518                         /* can't delete last address */
5519                         return;
5520                 }
5521         }
5522         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5523                 /* remove the address if it exists */
5524                 if (laddr->ifa == NULL)
5525                         continue;
5526                 if (laddr->ifa == ifa) {
5527                         sctp_remove_laddr(laddr);
5528                         return;
5529                 }
5530         }
5531
5532         /* address not found! */
5533         return;
5534 }
5535
5536 /*
5537  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5538  */
5539 /* sysctl */
5540 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5541 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5542
5543
5544
5545 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5546 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5547 int *sctp_cpuarry = NULL;
5548 void
5549 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5550 {
5551         /* Queue a packet to a processor for the specified core */
5552         struct sctp_mcore_queue *qent;
5553         struct sctp_mcore_ctrl *wkq;
5554         int need_wake = 0;
5555
5556         if (sctp_mcore_workers == NULL) {
5557                 /* Something went way bad during setup */
5558                 sctp_input_with_port(m, off, 0);
5559                 return;
5560         }
5561         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5562             (sizeof(struct sctp_mcore_queue)),
5563             SCTP_M_MCORE);
5564         if (qent == NULL) {
5565                 /* This is trouble  */
5566                 sctp_input_with_port(m, off, 0);
5567                 return;
5568         }
5569         qent->vn = curvnet;
5570         qent->m = m;
5571         qent->off = off;
5572         qent->v6 = 0;
5573         wkq = &sctp_mcore_workers[cpu_to_use];
5574         SCTP_MCORE_QLOCK(wkq);
5575
5576         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5577         if (wkq->running == 0) {
5578                 need_wake = 1;
5579         }
5580         SCTP_MCORE_QUNLOCK(wkq);
5581         if (need_wake) {
5582                 wakeup(&wkq->running);
5583         }
5584 }
5585
5586 static void
5587 sctp_mcore_thread(void *arg)
5588 {
5589
5590         struct sctp_mcore_ctrl *wkq;
5591         struct sctp_mcore_queue *qent;
5592
5593         wkq = (struct sctp_mcore_ctrl *)arg;
5594         struct mbuf *m;
5595         int off, v6;
5596
5597         /* Wait for first tickle */
5598         SCTP_MCORE_LOCK(wkq);
5599         wkq->running = 0;
5600         msleep(&wkq->running,
5601             &wkq->core_mtx,
5602             0, "wait for pkt", 0);
5603         SCTP_MCORE_UNLOCK(wkq);
5604
5605         /* Bind to our cpu */
5606         thread_lock(curthread);
5607         sched_bind(curthread, wkq->cpuid);
5608         thread_unlock(curthread);
5609
5610         /* Now lets start working */
5611         SCTP_MCORE_LOCK(wkq);
5612         /* Now grab lock and go */
5613         for (;;) {
5614                 SCTP_MCORE_QLOCK(wkq);
5615 skip_sleep:
5616                 wkq->running = 1;
5617                 qent = TAILQ_FIRST(&wkq->que);
5618                 if (qent) {
5619                         TAILQ_REMOVE(&wkq->que, qent, next);
5620                         SCTP_MCORE_QUNLOCK(wkq);
5621                         CURVNET_SET(qent->vn);
5622                         m = qent->m;
5623                         off = qent->off;
5624                         v6 = qent->v6;
5625                         SCTP_FREE(qent, SCTP_M_MCORE);
5626                         if (v6 == 0) {
5627                                 sctp_input_with_port(m, off, 0);
5628                         } else {
5629                                 SCTP_PRINTF("V6 not yet supported\n");
5630                                 sctp_m_freem(m);
5631                         }
5632                         CURVNET_RESTORE();
5633                         SCTP_MCORE_QLOCK(wkq);
5634                 }
5635                 wkq->running = 0;
5636                 if (!TAILQ_EMPTY(&wkq->que)) {
5637                         goto skip_sleep;
5638                 }
5639                 SCTP_MCORE_QUNLOCK(wkq);
5640                 msleep(&wkq->running,
5641                     &wkq->core_mtx,
5642                     0, "wait for pkt", 0);
5643         }
5644 }
5645
5646 static void
5647 sctp_startup_mcore_threads(void)
5648 {
5649         int i, cpu;
5650
5651         if (mp_ncpus == 1)
5652                 return;
5653
5654         if (sctp_mcore_workers != NULL) {
5655                 /*
5656                  * Already been here in some previous vnet?
5657                  */
5658                 return;
5659         }
5660         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5661             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5662             SCTP_M_MCORE);
5663         if (sctp_mcore_workers == NULL) {
5664                 /* TSNH I hope */
5665                 return;
5666         }
5667         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5668             sizeof(struct sctp_mcore_ctrl)));
5669         /* Init the structures */
5670         for (i = 0; i <= mp_maxid; i++) {
5671                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5672                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5673                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5674                 sctp_mcore_workers[i].cpuid = i;
5675         }
5676         if (sctp_cpuarry == NULL) {
5677                 SCTP_MALLOC(sctp_cpuarry, int *,
5678                     (mp_ncpus * sizeof(int)),
5679                     SCTP_M_MCORE);
5680                 i = 0;
5681                 CPU_FOREACH(cpu) {
5682                         sctp_cpuarry[i] = cpu;
5683                         i++;
5684                 }
5685         }
5686         /* Now start them all */
5687         CPU_FOREACH(cpu) {
5688                 (void)kproc_create(sctp_mcore_thread,
5689                     (void *)&sctp_mcore_workers[cpu],
5690                     &sctp_mcore_workers[cpu].thread_proc,
5691                     RFPROC,
5692                     SCTP_KTHREAD_PAGES,
5693                     SCTP_MCORE_NAME);
5694
5695         }
5696 }
5697
5698 #endif
5699
5700 void
5701 sctp_pcb_init()
5702 {
5703         /*
5704          * SCTP initialization for the PCB structures should be called by
5705          * the sctp_init() funciton.
5706          */
5707         int i;
5708         struct timeval tv;
5709
5710         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5711                 /* error I was called twice */
5712                 return;
5713         }
5714         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5715
5716 #if defined(SCTP_LOCAL_TRACE_BUF)
5717         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5718 #endif
5719 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5720         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5721             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5722             SCTP_M_MCORE);
5723 #endif
5724         (void)SCTP_GETTIME_TIMEVAL(&tv);
5725 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5726         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5727         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5728         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5729 #else
5730         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5731         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5732         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5733 #endif
5734         /* init the empty list of (All) Endpoints */
5735         LIST_INIT(&SCTP_BASE_INFO(listhead));
5736
5737
5738         /* init the hash table of endpoints */
5739         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5740         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5741         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5742         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5743             &SCTP_BASE_INFO(hashasocmark));
5744         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5745             &SCTP_BASE_INFO(hashmark));
5746         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5747             &SCTP_BASE_INFO(hashtcpmark));
5748         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5749
5750
5751         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5752             &SCTP_BASE_INFO(hashvrfmark));
5753
5754         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5755             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5756         /* init the zones */
5757         /*
5758          * FIX ME: Should check for NULL returns, but if it does fail we are
5759          * doomed to panic anyways... add later maybe.
5760          */
5761         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5762             sizeof(struct sctp_inpcb), maxsockets);
5763
5764         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5765             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5766
5767         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5768             sizeof(struct sctp_laddr),
5769             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5770
5771         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5772             sizeof(struct sctp_nets),
5773             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5774
5775         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5776             sizeof(struct sctp_tmit_chunk),
5777             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5778
5779         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5780             sizeof(struct sctp_queued_to_read),
5781             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5782
5783         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5784             sizeof(struct sctp_stream_queue_pending),
5785             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5786
5787         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5788             sizeof(struct sctp_asconf),
5789             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5790
5791         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5792             sizeof(struct sctp_asconf_ack),
5793             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5794
5795
5796         /* Master Lock INIT for info structure */
5797         SCTP_INP_INFO_LOCK_INIT();
5798         SCTP_STATLOG_INIT_LOCK();
5799
5800         SCTP_IPI_COUNT_INIT();
5801         SCTP_IPI_ADDR_INIT();
5802 #ifdef SCTP_PACKET_LOGGING
5803         SCTP_IP_PKTLOG_INIT();
5804 #endif
5805         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5806
5807         SCTP_WQ_ADDR_INIT();
5808         /* not sure if we need all the counts */
5809         SCTP_BASE_INFO(ipi_count_ep) = 0;
5810         /* assoc/tcb zone info */
5811         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5812         /* local addrlist zone info */
5813         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5814         /* remote addrlist zone info */
5815         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5816         /* chunk info */
5817         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5818
5819         /* socket queue zone info */
5820         SCTP_BASE_INFO(ipi_count_readq) = 0;
5821
5822         /* stream out queue cont */
5823         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5824
5825         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5826         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5827
5828         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5829
5830         /* Init the TIMEWAIT list */
5831         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5832                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5833         }
5834
5835         sctp_startup_iterator();
5836
5837 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5838         sctp_startup_mcore_threads();
5839 #endif
5840
5841         /*
5842          * INIT the default VRF which for BSD is the only one, other O/S's
5843          * may have more. But initially they must start with one and then
5844          * add the VRF's as addresses are added.
5845          */
5846         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5847 }
5848
5849 /*
5850  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5851  */
5852 void
5853 sctp_pcb_finish(void)
5854 {
5855         struct sctp_vrflist *vrf_bucket;
5856         struct sctp_vrf *vrf, *nvrf;
5857         struct sctp_ifn *ifn, *nifn;
5858         struct sctp_ifa *ifa, *nifa;
5859         struct sctpvtaghead *chain;
5860         struct sctp_tagblock *twait_block, *prev_twait_block;
5861         struct sctp_laddr *wi, *nwi;
5862         int i;
5863
5864         /*
5865          * Free BSD the it thread never exits but we do clean up. The only
5866          * way freebsd reaches here if we have VRF's but we still add the
5867          * ifdef to make it compile on old versions.
5868          */
5869         {
5870                 struct sctp_iterator *it, *nit;
5871
5872                 SCTP_IPI_ITERATOR_WQ_LOCK();
5873                 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5874                         if (it->vn != curvnet) {
5875                                 continue;
5876                         }
5877                         TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5878                         if (it->function_atend != NULL) {
5879                                 (*it->function_atend) (it->pointer, it->val);
5880                         }
5881                         SCTP_FREE(it, SCTP_M_ITER);
5882                 }
5883                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5884                 SCTP_ITERATOR_LOCK();
5885                 if ((sctp_it_ctl.cur_it) &&
5886                     (sctp_it_ctl.cur_it->vn == curvnet)) {
5887                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5888                 }
5889                 SCTP_ITERATOR_UNLOCK();
5890         }
5891
5892         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5893         SCTP_WQ_ADDR_LOCK();
5894         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5895                 LIST_REMOVE(wi, sctp_nxt_addr);
5896                 SCTP_DECR_LADDR_COUNT();
5897                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5898         }
5899         SCTP_WQ_ADDR_UNLOCK();
5900
5901         /*
5902          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5903          * destroyed first).
5904          */
5905         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5906         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5907                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5908                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5909                                 /* free the ifa */
5910                                 LIST_REMOVE(ifa, next_bucket);
5911                                 LIST_REMOVE(ifa, next_ifa);
5912                                 SCTP_FREE(ifa, SCTP_M_IFA);
5913                         }
5914                         /* free the ifn */
5915                         LIST_REMOVE(ifn, next_bucket);
5916                         LIST_REMOVE(ifn, next_ifn);
5917                         SCTP_FREE(ifn, SCTP_M_IFN);
5918                 }
5919                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5920                 /* free the vrf */
5921                 LIST_REMOVE(vrf, next_vrf);
5922                 SCTP_FREE(vrf, SCTP_M_VRF);
5923         }
5924         /* free the vrf hashes */
5925         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5926         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5927
5928         /*
5929          * free the TIMEWAIT list elements malloc'd in the function
5930          * sctp_add_vtag_to_timewait()...
5931          */
5932         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5933                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5934                 if (!LIST_EMPTY(chain)) {
5935                         prev_twait_block = NULL;
5936                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5937                                 if (prev_twait_block) {
5938                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5939                                 }
5940                                 prev_twait_block = twait_block;
5941                         }
5942                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5943                 }
5944         }
5945
5946         /* free the locks and mutexes */
5947 #ifdef SCTP_PACKET_LOGGING
5948         SCTP_IP_PKTLOG_DESTROY();
5949 #endif
5950         SCTP_IPI_ADDR_DESTROY();
5951         SCTP_STATLOG_DESTROY();
5952         SCTP_INP_INFO_LOCK_DESTROY();
5953
5954         SCTP_WQ_ADDR_DESTROY();
5955
5956         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5957         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5958         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5959         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5960         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5961         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5962         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5963         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5964         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5965         /* Get rid of other stuff to */
5966         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5967                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5968         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5969                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5970         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5971                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5972 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5973         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
5974 #endif
5975 }
5976
5977
5978 int
5979 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5980     int offset, int limit,
5981     struct sockaddr *src, struct sockaddr *dst,
5982     struct sockaddr *altsa)
5983 {
5984         /*
5985          * grub through the INIT pulling addresses and loading them to the
5986          * nets structure in the asoc. The from address in the mbuf should
5987          * also be loaded (if it is not already). This routine can be called
5988          * with either INIT or INIT-ACK's as long as the m points to the IP
5989          * packet and the offset points to the beginning of the parameters.
5990          */
5991         struct sctp_inpcb *inp;
5992         struct sctp_nets *net, *nnet, *net_tmp;
5993         struct sctp_paramhdr *phdr, parm_buf;
5994         struct sctp_tcb *stcb_tmp;
5995         uint16_t ptype, plen;
5996         struct sockaddr *sa;
5997         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
5998         struct sctp_auth_random *p_random = NULL;
5999         uint16_t random_len = 0;
6000         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6001         struct sctp_auth_hmac_algo *hmacs = NULL;
6002         uint16_t hmacs_len = 0;
6003         uint8_t saw_asconf = 0;
6004         uint8_t saw_asconf_ack = 0;
6005         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6006         struct sctp_auth_chunk_list *chunks = NULL;
6007         uint16_t num_chunks = 0;
6008         sctp_key_t *new_key;
6009         uint32_t keylen;
6010         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6011         uint8_t ecn_allowed;
6012
6013 #ifdef INET
6014         struct sockaddr_in sin;
6015
6016 #endif
6017 #ifdef INET6
6018         struct sockaddr_in6 sin6;
6019
6020 #endif
6021
6022         /* First get the destination address setup too. */
6023 #ifdef INET
6024         memset(&sin, 0, sizeof(sin));
6025         sin.sin_family = AF_INET;
6026         sin.sin_len = sizeof(sin);
6027         sin.sin_port = stcb->rport;
6028 #endif
6029 #ifdef INET6
6030         memset(&sin6, 0, sizeof(sin6));
6031         sin6.sin6_family = AF_INET6;
6032         sin6.sin6_len = sizeof(struct sockaddr_in6);
6033         sin6.sin6_port = stcb->rport;
6034 #endif
6035         if (altsa) {
6036                 sa = altsa;
6037         } else {
6038                 sa = src;
6039         }
6040         /* Turn off ECN until we get through all params */
6041         ecn_allowed = 0;
6042         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6043                 /* mark all addresses that we have currently on the list */
6044                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6045         }
6046         /* does the source address already exist? if so skip it */
6047         inp = stcb->sctp_ep;
6048         atomic_add_int(&stcb->asoc.refcnt, 1);
6049         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6050         atomic_add_int(&stcb->asoc.refcnt, -1);
6051
6052         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6053                 /* we must add the source address */
6054                 /* no scope set here since we have a tcb already. */
6055                 switch (sa->sa_family) {
6056 #ifdef INET
6057                 case AF_INET:
6058                         if (stcb->asoc.ipv4_addr_legal) {
6059                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6060                                         return (-1);
6061                                 }
6062                         }
6063                         break;
6064 #endif
6065 #ifdef INET6
6066                 case AF_INET6:
6067                         if (stcb->asoc.ipv6_addr_legal) {
6068                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6069                                         return (-2);
6070                                 }
6071                         }
6072                         break;
6073 #endif
6074                 default:
6075                         break;
6076                 }
6077         } else {
6078                 if (net_tmp != NULL && stcb_tmp == stcb) {
6079                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6080                 } else if (stcb_tmp != stcb) {
6081                         /* It belongs to another association? */
6082                         if (stcb_tmp)
6083                                 SCTP_TCB_UNLOCK(stcb_tmp);
6084                         return (-3);
6085                 }
6086         }
6087         if (stcb->asoc.state == 0) {
6088                 /* the assoc was freed? */
6089                 return (-4);
6090         }
6091         /*
6092          * peer must explicitly turn this on. This may have been initialized
6093          * to be "on" in order to allow local addr changes while INIT's are
6094          * in flight.
6095          */
6096         stcb->asoc.peer_supports_asconf = 0;
6097         /* now we must go through each of the params. */
6098         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6099         while (phdr) {
6100                 ptype = ntohs(phdr->param_type);
6101                 plen = ntohs(phdr->param_length);
6102                 /*
6103                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6104                  * (uint32_t)ptype, (int)plen);
6105                  */
6106                 if (offset + plen > limit) {
6107                         break;
6108                 }
6109                 if (plen == 0) {
6110                         break;
6111                 }
6112 #ifdef INET
6113                 if (ptype == SCTP_IPV4_ADDRESS) {
6114                         if (stcb->asoc.ipv4_addr_legal) {
6115                                 struct sctp_ipv4addr_param *p4, p4_buf;
6116
6117                                 /* ok get the v4 address and check/add */
6118                                 phdr = sctp_get_next_param(m, offset,
6119                                     (struct sctp_paramhdr *)&p4_buf,
6120                                     sizeof(p4_buf));
6121                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6122                                     phdr == NULL) {
6123                                         return (-5);
6124                                 }
6125                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6126                                 sin.sin_addr.s_addr = p4->addr;
6127                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6128                                         /* Skip multi-cast addresses */
6129                                         goto next_param;
6130                                 }
6131                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6132                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6133                                         goto next_param;
6134                                 }
6135                                 sa = (struct sockaddr *)&sin;
6136                                 inp = stcb->sctp_ep;
6137                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6138                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6139                                     dst, stcb);
6140                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6141
6142                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6143                                     inp == NULL) {
6144                                         /* we must add the source address */
6145                                         /*
6146                                          * no scope set since we have a tcb
6147                                          * already
6148                                          */
6149
6150                                         /*
6151                                          * we must validate the state again
6152                                          * here
6153                                          */
6154                         add_it_now:
6155                                         if (stcb->asoc.state == 0) {
6156                                                 /* the assoc was freed? */
6157                                                 return (-7);
6158                                         }
6159                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6160                                                 return (-8);
6161                                         }
6162                                 } else if (stcb_tmp == stcb) {
6163                                         if (stcb->asoc.state == 0) {
6164                                                 /* the assoc was freed? */
6165                                                 return (-10);
6166                                         }
6167                                         if (net != NULL) {
6168                                                 /* clear flag */
6169                                                 net->dest_state &=
6170                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6171                                         }
6172                                 } else {
6173                                         /*
6174                                          * strange, address is in another
6175                                          * assoc? straighten out locks.
6176                                          */
6177                                         if (stcb_tmp) {
6178                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6179                                                         /*
6180                                                          * in setup state we
6181                                                          * abort this guy
6182                                                          */
6183                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6184                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6185                                                         goto add_it_now;
6186                                                 }
6187                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6188                                         }
6189                                         if (stcb->asoc.state == 0) {
6190                                                 /* the assoc was freed? */
6191                                                 return (-12);
6192                                         }
6193                                         return (-13);
6194                                 }
6195                         }
6196                 } else
6197 #endif
6198 #ifdef INET6
6199                 if (ptype == SCTP_IPV6_ADDRESS) {
6200                         if (stcb->asoc.ipv6_addr_legal) {
6201                                 /* ok get the v6 address and check/add */
6202                                 struct sctp_ipv6addr_param *p6, p6_buf;
6203
6204                                 phdr = sctp_get_next_param(m, offset,
6205                                     (struct sctp_paramhdr *)&p6_buf,
6206                                     sizeof(p6_buf));
6207                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6208                                     phdr == NULL) {
6209                                         return (-14);
6210                                 }
6211                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6212                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6213                                     sizeof(p6->addr));
6214                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6215                                         /* Skip multi-cast addresses */
6216                                         goto next_param;
6217                                 }
6218                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6219                                         /*
6220                                          * Link local make no sense without
6221                                          * scope
6222                                          */
6223                                         goto next_param;
6224                                 }
6225                                 sa = (struct sockaddr *)&sin6;
6226                                 inp = stcb->sctp_ep;
6227                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6228                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6229                                     dst, stcb);
6230                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6231                                 if (stcb_tmp == NULL &&
6232                                     (inp == stcb->sctp_ep || inp == NULL)) {
6233                                         /*
6234                                          * we must validate the state again
6235                                          * here
6236                                          */
6237                         add_it_now6:
6238                                         if (stcb->asoc.state == 0) {
6239                                                 /* the assoc was freed? */
6240                                                 return (-16);
6241                                         }
6242                                         /*
6243                                          * we must add the address, no scope
6244                                          * set
6245                                          */
6246                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6247                                                 return (-17);
6248                                         }
6249                                 } else if (stcb_tmp == stcb) {
6250                                         /*
6251                                          * we must validate the state again
6252                                          * here
6253                                          */
6254                                         if (stcb->asoc.state == 0) {
6255                                                 /* the assoc was freed? */
6256                                                 return (-19);
6257                                         }
6258                                         if (net != NULL) {
6259                                                 /* clear flag */
6260                                                 net->dest_state &=
6261                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6262                                         }
6263                                 } else {
6264                                         /*
6265                                          * strange, address is in another
6266                                          * assoc? straighten out locks.
6267                                          */
6268                                         if (stcb_tmp)
6269                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6270                                                         /*
6271                                                          * in setup state we
6272                                                          * abort this guy
6273                                                          */
6274                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6275                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6276                                                         goto add_it_now6;
6277                                                 }
6278                                         SCTP_TCB_UNLOCK(stcb_tmp);
6279
6280                                         if (stcb->asoc.state == 0) {
6281                                                 /* the assoc was freed? */
6282                                                 return (-21);
6283                                         }
6284                                         return (-22);
6285                                 }
6286                         }
6287                 } else
6288 #endif
6289                 if (ptype == SCTP_ECN_CAPABLE) {
6290                         ecn_allowed = 1;
6291                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6292                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6293                                 struct sctp_adaptation_layer_indication ai,
6294                                                                 *aip;
6295
6296                                 phdr = sctp_get_next_param(m, offset,
6297                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6298                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6299                                 if (aip) {
6300                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6301                                         stcb->asoc.adaptation_needed = 1;
6302                                 }
6303                         }
6304                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6305                         struct sctp_asconf_addr_param lstore, *fee;
6306                         int lptype;
6307                         struct sockaddr *lsa = NULL;
6308
6309 #ifdef INET
6310                         struct sctp_asconf_addrv4_param *fii;
6311
6312 #endif
6313
6314                         stcb->asoc.peer_supports_asconf = 1;
6315                         if (plen > sizeof(lstore)) {
6316                                 return (-23);
6317                         }
6318                         phdr = sctp_get_next_param(m, offset,
6319                             (struct sctp_paramhdr *)&lstore,
6320                             min(plen, sizeof(lstore)));
6321                         if (phdr == NULL) {
6322                                 return (-24);
6323                         }
6324                         fee = (struct sctp_asconf_addr_param *)phdr;
6325                         lptype = ntohs(fee->addrp.ph.param_type);
6326                         switch (lptype) {
6327 #ifdef INET
6328                         case SCTP_IPV4_ADDRESS:
6329                                 if (plen !=
6330                                     sizeof(struct sctp_asconf_addrv4_param)) {
6331                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6332                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6333                                             plen);
6334                                 } else {
6335                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6336                                         sin.sin_addr.s_addr = fii->addrp.addr;
6337                                         lsa = (struct sockaddr *)&sin;
6338                                 }
6339                                 break;
6340 #endif
6341 #ifdef INET6
6342                         case SCTP_IPV6_ADDRESS:
6343                                 if (plen !=
6344                                     sizeof(struct sctp_asconf_addr_param)) {
6345                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6346                                             (int)sizeof(struct sctp_asconf_addr_param),
6347                                             plen);
6348                                 } else {
6349                                         memcpy(sin6.sin6_addr.s6_addr,
6350                                             fee->addrp.addr,
6351                                             sizeof(fee->addrp.addr));
6352                                         lsa = (struct sockaddr *)&sin6;
6353                                 }
6354                                 break;
6355 #endif
6356                         default:
6357                                 break;
6358                         }
6359                         if (lsa) {
6360                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6361                         }
6362                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6363                         stcb->asoc.peer_supports_nat = 1;
6364                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6365                         /* Peer supports pr-sctp */
6366                         stcb->asoc.peer_supports_prsctp = 1;
6367                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6368                         /* A supported extension chunk */
6369                         struct sctp_supported_chunk_types_param *pr_supported;
6370                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6371                         int num_ent, i;
6372
6373                         phdr = sctp_get_next_param(m, offset,
6374                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6375                         if (phdr == NULL) {
6376                                 return (-25);
6377                         }
6378                         stcb->asoc.peer_supports_asconf = 0;
6379                         stcb->asoc.peer_supports_prsctp = 0;
6380                         stcb->asoc.peer_supports_pktdrop = 0;
6381                         stcb->asoc.peer_supports_strreset = 0;
6382                         stcb->asoc.peer_supports_nr_sack = 0;
6383                         stcb->asoc.peer_supports_auth = 0;
6384                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6385                         num_ent = plen - sizeof(struct sctp_paramhdr);
6386                         for (i = 0; i < num_ent; i++) {
6387                                 switch (pr_supported->chunk_types[i]) {
6388                                 case SCTP_ASCONF:
6389                                 case SCTP_ASCONF_ACK:
6390                                         stcb->asoc.peer_supports_asconf = 1;
6391                                         break;
6392                                 case SCTP_FORWARD_CUM_TSN:
6393                                         stcb->asoc.peer_supports_prsctp = 1;
6394                                         break;
6395                                 case SCTP_PACKET_DROPPED:
6396                                         stcb->asoc.peer_supports_pktdrop = 1;
6397                                         break;
6398                                 case SCTP_NR_SELECTIVE_ACK:
6399                                         stcb->asoc.peer_supports_nr_sack = 1;
6400                                         break;
6401                                 case SCTP_STREAM_RESET:
6402                                         stcb->asoc.peer_supports_strreset = 1;
6403                                         break;
6404                                 case SCTP_AUTHENTICATION:
6405                                         stcb->asoc.peer_supports_auth = 1;
6406                                         break;
6407                                 default:
6408                                         /* one I have not learned yet */
6409                                         break;
6410
6411                                 }
6412                         }
6413                 } else if (ptype == SCTP_RANDOM) {
6414                         if (plen > sizeof(random_store))
6415                                 break;
6416                         if (got_random) {
6417                                 /* already processed a RANDOM */
6418                                 goto next_param;
6419                         }
6420                         phdr = sctp_get_next_param(m, offset,
6421                             (struct sctp_paramhdr *)random_store,
6422                             min(sizeof(random_store), plen));
6423                         if (phdr == NULL)
6424                                 return (-26);
6425                         p_random = (struct sctp_auth_random *)phdr;
6426                         random_len = plen - sizeof(*p_random);
6427                         /* enforce the random length */
6428                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6429                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6430                                 return (-27);
6431                         }
6432                         got_random = 1;
6433                 } else if (ptype == SCTP_HMAC_LIST) {
6434                         int num_hmacs;
6435                         int i;
6436
6437                         if (plen > sizeof(hmacs_store))
6438                                 break;
6439                         if (got_hmacs) {
6440                                 /* already processed a HMAC list */
6441                                 goto next_param;
6442                         }
6443                         phdr = sctp_get_next_param(m, offset,
6444                             (struct sctp_paramhdr *)hmacs_store,
6445                             min(plen, sizeof(hmacs_store)));
6446                         if (phdr == NULL)
6447                                 return (-28);
6448                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6449                         hmacs_len = plen - sizeof(*hmacs);
6450                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6451                         /* validate the hmac list */
6452                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6453                                 return (-29);
6454                         }
6455                         if (stcb->asoc.peer_hmacs != NULL)
6456                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6457                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6458                         if (stcb->asoc.peer_hmacs != NULL) {
6459                                 for (i = 0; i < num_hmacs; i++) {
6460                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6461                                             ntohs(hmacs->hmac_ids[i]));
6462                                 }
6463                         }
6464                         got_hmacs = 1;
6465                 } else if (ptype == SCTP_CHUNK_LIST) {
6466                         int i;
6467
6468                         if (plen > sizeof(chunks_store))
6469                                 break;
6470                         if (got_chklist) {
6471                                 /* already processed a Chunks list */
6472                                 goto next_param;
6473                         }
6474                         phdr = sctp_get_next_param(m, offset,
6475                             (struct sctp_paramhdr *)chunks_store,
6476                             min(plen, sizeof(chunks_store)));
6477                         if (phdr == NULL)
6478                                 return (-30);
6479                         chunks = (struct sctp_auth_chunk_list *)phdr;
6480                         num_chunks = plen - sizeof(*chunks);
6481                         if (stcb->asoc.peer_auth_chunks != NULL)
6482                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6483                         else
6484                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6485                         for (i = 0; i < num_chunks; i++) {
6486                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6487                                     stcb->asoc.peer_auth_chunks);
6488                                 /* record asconf/asconf-ack if listed */
6489                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6490                                         saw_asconf = 1;
6491                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6492                                         saw_asconf_ack = 1;
6493
6494                         }
6495                         got_chklist = 1;
6496                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6497                             (ptype == SCTP_STATE_COOKIE) ||
6498                             (ptype == SCTP_UNRECOG_PARAM) ||
6499                             (ptype == SCTP_COOKIE_PRESERVE) ||
6500                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6501                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6502                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6503                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6504                     (ptype == SCTP_SUCCESS_REPORT)) {
6505                          /* don't care */ ;
6506                 } else {
6507                         if ((ptype & 0x8000) == 0x0000) {
6508                                 /*
6509                                  * must stop processing the rest of the
6510                                  * param's. Any report bits were handled
6511                                  * with the call to
6512                                  * sctp_arethere_unrecognized_parameters()
6513                                  * when the INIT or INIT-ACK was first seen.
6514                                  */
6515                                 break;
6516                         }
6517                 }
6518
6519 next_param:
6520                 offset += SCTP_SIZE32(plen);
6521                 if (offset >= limit) {
6522                         break;
6523                 }
6524                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6525                     sizeof(parm_buf));
6526         }
6527         /* Now check to see if we need to purge any addresses */
6528         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6529                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6530                     SCTP_ADDR_NOT_IN_ASSOC) {
6531                         /* This address has been removed from the asoc */
6532                         /* remove and free it */
6533                         stcb->asoc.numnets--;
6534                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6535                         sctp_free_remote_addr(net);
6536                         if (net == stcb->asoc.primary_destination) {
6537                                 stcb->asoc.primary_destination = NULL;
6538                                 sctp_select_primary_destination(stcb);
6539                         }
6540                 }
6541         }
6542         if (ecn_allowed == 0) {
6543                 stcb->asoc.ecn_allowed = 0;
6544         }
6545         /* validate authentication required parameters */
6546         if (got_random && got_hmacs) {
6547                 stcb->asoc.peer_supports_auth = 1;
6548         } else {
6549                 stcb->asoc.peer_supports_auth = 0;
6550         }
6551         if (!stcb->asoc.peer_supports_auth && got_chklist) {
6552                 /* peer does not support auth but sent a chunks list? */
6553                 return (-31);
6554         }
6555         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6556             !stcb->asoc.peer_supports_auth) {
6557                 /* peer supports asconf but not auth? */
6558                 return (-32);
6559         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6560             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6561                 return (-33);
6562         }
6563         /* concatenate the full random key */
6564         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6565         if (chunks != NULL) {
6566                 keylen += sizeof(*chunks) + num_chunks;
6567         }
6568         new_key = sctp_alloc_key(keylen);
6569         if (new_key != NULL) {
6570                 /* copy in the RANDOM */
6571                 if (p_random != NULL) {
6572                         keylen = sizeof(*p_random) + random_len;
6573                         bcopy(p_random, new_key->key, keylen);
6574                 }
6575                 /* append in the AUTH chunks */
6576                 if (chunks != NULL) {
6577                         bcopy(chunks, new_key->key + keylen,
6578                             sizeof(*chunks) + num_chunks);
6579                         keylen += sizeof(*chunks) + num_chunks;
6580                 }
6581                 /* append in the HMACs */
6582                 if (hmacs != NULL) {
6583                         bcopy(hmacs, new_key->key + keylen,
6584                             sizeof(*hmacs) + hmacs_len);
6585                 }
6586         } else {
6587                 /* failed to get memory for the key */
6588                 return (-34);
6589         }
6590         if (stcb->asoc.authinfo.peer_random != NULL)
6591                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6592         stcb->asoc.authinfo.peer_random = new_key;
6593         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6594         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6595
6596         return (0);
6597 }
6598
6599 int
6600 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6601     struct sctp_nets *net)
6602 {
6603         /* make sure the requested primary address exists in the assoc */
6604         if (net == NULL && sa)
6605                 net = sctp_findnet(stcb, sa);
6606
6607         if (net == NULL) {
6608                 /* didn't find the requested primary address! */
6609                 return (-1);
6610         } else {
6611                 /* set the primary address */
6612                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6613                         /* Must be confirmed, so queue to set */
6614                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6615                         return (0);
6616                 }
6617                 stcb->asoc.primary_destination = net;
6618                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6619                         sctp_free_remote_addr(stcb->asoc.alternate);
6620                         stcb->asoc.alternate = NULL;
6621                 }
6622                 net = TAILQ_FIRST(&stcb->asoc.nets);
6623                 if (net != stcb->asoc.primary_destination) {
6624                         /*
6625                          * first one on the list is NOT the primary
6626                          * sctp_cmpaddr() is much more efficient if the
6627                          * primary is the first on the list, make it so.
6628                          */
6629                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6630                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6631                 }
6632                 return (0);
6633         }
6634 }
6635
6636 int
6637 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6638 {
6639         /*
6640          * This function serves two purposes. It will see if a TAG can be
6641          * re-used and return 1 for yes it is ok and 0 for don't use that
6642          * tag. A secondary function it will do is purge out old tags that
6643          * can be removed.
6644          */
6645         struct sctpvtaghead *chain;
6646         struct sctp_tagblock *twait_block;
6647         struct sctpasochead *head;
6648         struct sctp_tcb *stcb;
6649         int i;
6650
6651         SCTP_INP_INFO_RLOCK();
6652         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6653             SCTP_BASE_INFO(hashasocmark))];
6654         if (head == NULL) {
6655                 /* invalid vtag */
6656                 goto skip_vtag_check;
6657         }
6658         LIST_FOREACH(stcb, head, sctp_asocs) {
6659                 /*
6660                  * We choose not to lock anything here. TCB's can't be
6661                  * removed since we have the read lock, so they can't be
6662                  * freed on us, same thing for the INP. I may be wrong with
6663                  * this assumption, but we will go with it for now :-)
6664                  */
6665                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6666                         continue;
6667                 }
6668                 if (stcb->asoc.my_vtag == tag) {
6669                         /* candidate */
6670                         if (stcb->rport != rport) {
6671                                 continue;
6672                         }
6673                         if (stcb->sctp_ep->sctp_lport != lport) {
6674                                 continue;
6675                         }
6676                         /* Its a used tag set */
6677                         SCTP_INP_INFO_RUNLOCK();
6678                         return (0);
6679                 }
6680         }
6681 skip_vtag_check:
6682
6683         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6684         /* Now what about timed wait ? */
6685         if (!LIST_EMPTY(chain)) {
6686                 /*
6687                  * Block(s) are present, lets see if we have this tag in the
6688                  * list
6689                  */
6690                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6691                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6692                                 if (twait_block->vtag_block[i].v_tag == 0) {
6693                                         /* not used */
6694                                         continue;
6695                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6696                                     now->tv_sec) {
6697                                         /* Audit expires this guy */
6698                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
6699                                         twait_block->vtag_block[i].v_tag = 0;
6700                                         twait_block->vtag_block[i].lport = 0;
6701                                         twait_block->vtag_block[i].rport = 0;
6702                                 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6703                                             (twait_block->vtag_block[i].lport == lport) &&
6704                                     (twait_block->vtag_block[i].rport == rport)) {
6705                                         /* Bad tag, sorry :< */
6706                                         SCTP_INP_INFO_RUNLOCK();
6707                                         return (0);
6708                                 }
6709                         }
6710                 }
6711         }
6712         SCTP_INP_INFO_RUNLOCK();
6713         return (1);
6714 }
6715
6716 static void
6717 sctp_drain_mbufs(struct sctp_tcb *stcb)
6718 {
6719         /*
6720          * We must hunt this association for MBUF's past the cumack (i.e.
6721          * out of order data that we can renege on).
6722          */
6723         struct sctp_association *asoc;
6724         struct sctp_tmit_chunk *chk, *nchk;
6725         uint32_t cumulative_tsn_p1;
6726         struct sctp_queued_to_read *ctl, *nctl;
6727         int cnt, strmat;
6728         uint32_t gap, i;
6729         int fnd = 0;
6730
6731         /* We look for anything larger than the cum-ack + 1 */
6732
6733         asoc = &stcb->asoc;
6734         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6735                 /* none we can reneg on. */
6736                 return;
6737         }
6738         SCTP_STAT_INCR(sctps_protocol_drains_done);
6739         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6740         cnt = 0;
6741         /* First look in the re-assembly queue */
6742         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6743                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6744                         /* Yep it is above cum-ack */
6745                         cnt++;
6746                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6747                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6748                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6749                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6750                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6751                         if (chk->data) {
6752                                 sctp_m_freem(chk->data);
6753                                 chk->data = NULL;
6754                         }
6755                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6756                 }
6757         }
6758         /* Ok that was fun, now we will drain all the inbound streams? */
6759         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6760                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6761                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6762                                 /* Yep it is above cum-ack */
6763                                 cnt++;
6764                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6765                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6766                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6767                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6768                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6769                                 if (ctl->data) {
6770                                         sctp_m_freem(ctl->data);
6771                                         ctl->data = NULL;
6772                                 }
6773                                 sctp_free_remote_addr(ctl->whoFrom);
6774                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6775                                 SCTP_DECR_READQ_COUNT();
6776                         }
6777                 }
6778         }
6779         if (cnt) {
6780                 /* We must back down to see what the new highest is */
6781                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6782                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6783                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6784                                 asoc->highest_tsn_inside_map = i;
6785                                 fnd = 1;
6786                                 break;
6787                         }
6788                 }
6789                 if (!fnd) {
6790                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6791                 }
6792                 /*
6793                  * Question, should we go through the delivery queue? The
6794                  * only reason things are on here is the app not reading OR
6795                  * a p-d-api up. An attacker COULD send enough in to
6796                  * initiate the PD-API and then send a bunch of stuff to
6797                  * other streams... these would wind up on the delivery
6798                  * queue.. and then we would not get to them. But in order
6799                  * to do this I then have to back-track and un-deliver
6800                  * sequence numbers in streams.. el-yucko. I think for now
6801                  * we will NOT look at the delivery queue and leave it to be
6802                  * something to consider later. An alternative would be to
6803                  * abort the P-D-API with a notification and then deliver
6804                  * the data.... Or another method might be to keep track of
6805                  * how many times the situation occurs and if we see a
6806                  * possible attack underway just abort the association.
6807                  */
6808 #ifdef SCTP_DEBUG
6809                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6810 #endif
6811                 /*
6812                  * Now do we need to find a new
6813                  * asoc->highest_tsn_inside_map?
6814                  */
6815                 asoc->last_revoke_count = cnt;
6816                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6817                 /* sa_ignore NO_NULL_CHK */
6818                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6819                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6820         }
6821         /*
6822          * Another issue, in un-setting the TSN's in the mapping array we
6823          * DID NOT adjust the highest_tsn marker.  This will cause one of
6824          * two things to occur. It may cause us to do extra work in checking
6825          * for our mapping array movement. More importantly it may cause us
6826          * to SACK every datagram. This may not be a bad thing though since
6827          * we will recover once we get our cum-ack above and all this stuff
6828          * we dumped recovered.
6829          */
6830 }
6831
6832 void
6833 sctp_drain()
6834 {
6835         /*
6836          * We must walk the PCB lists for ALL associations here. The system
6837          * is LOW on MBUF's and needs help. This is where reneging will
6838          * occur. We really hope this does NOT happen!
6839          */
6840         VNET_ITERATOR_DECL(vnet_iter);
6841         VNET_LIST_RLOCK_NOSLEEP();
6842         VNET_FOREACH(vnet_iter) {
6843                 CURVNET_SET(vnet_iter);
6844                 struct sctp_inpcb *inp;
6845                 struct sctp_tcb *stcb;
6846
6847                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6848                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6849 #ifdef VIMAGE
6850                         continue;
6851 #else
6852                         return;
6853 #endif
6854                 }
6855                 SCTP_INP_INFO_RLOCK();
6856                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6857                         /* For each endpoint */
6858                         SCTP_INP_RLOCK(inp);
6859                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6860                                 /* For each association */
6861                                 SCTP_TCB_LOCK(stcb);
6862                                 sctp_drain_mbufs(stcb);
6863                                 SCTP_TCB_UNLOCK(stcb);
6864                         }
6865                         SCTP_INP_RUNLOCK(inp);
6866                 }
6867                 SCTP_INP_INFO_RUNLOCK();
6868                 CURVNET_RESTORE();
6869         }
6870         VNET_LIST_RUNLOCK_NOSLEEP();
6871 }
6872
6873 /*
6874  * start a new iterator
6875  * iterates through all endpoints and associations based on the pcb_state
6876  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6877  * assocs and "ef" (optional) is executed when the iterator completes.
6878  * "inpf" (optional) is executed for each new endpoint as it is being
6879  * iterated through. inpe (optional) is called when the inp completes
6880  * its way through all the stcbs.
6881  */
6882 int
6883 sctp_initiate_iterator(inp_func inpf,
6884     asoc_func af,
6885     inp_func inpe,
6886     uint32_t pcb_state,
6887     uint32_t pcb_features,
6888     uint32_t asoc_state,
6889     void *argp,
6890     uint32_t argi,
6891     end_func ef,
6892     struct sctp_inpcb *s_inp,
6893     uint8_t chunk_output_off)
6894 {
6895         struct sctp_iterator *it = NULL;
6896
6897         if (af == NULL) {
6898                 return (-1);
6899         }
6900         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6901             SCTP_M_ITER);
6902         if (it == NULL) {
6903                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6904                 return (ENOMEM);
6905         }
6906         memset(it, 0, sizeof(*it));
6907         it->function_assoc = af;
6908         it->function_inp = inpf;
6909         if (inpf)
6910                 it->done_current_ep = 0;
6911         else
6912                 it->done_current_ep = 1;
6913         it->function_atend = ef;
6914         it->pointer = argp;
6915         it->val = argi;
6916         it->pcb_flags = pcb_state;
6917         it->pcb_features = pcb_features;
6918         it->asoc_state = asoc_state;
6919         it->function_inp_end = inpe;
6920         it->no_chunk_output = chunk_output_off;
6921         it->vn = curvnet;
6922         if (s_inp) {
6923                 /* Assume lock is held here */
6924                 it->inp = s_inp;
6925                 SCTP_INP_INCR_REF(it->inp);
6926                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
6927         } else {
6928                 SCTP_INP_INFO_RLOCK();
6929                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
6930                 if (it->inp) {
6931                         SCTP_INP_INCR_REF(it->inp);
6932                 }
6933                 SCTP_INP_INFO_RUNLOCK();
6934                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
6935
6936         }
6937         SCTP_IPI_ITERATOR_WQ_LOCK();
6938
6939         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
6940         if (sctp_it_ctl.iterator_running == 0) {
6941                 sctp_wakeup_iterator();
6942         }
6943         SCTP_IPI_ITERATOR_WQ_UNLOCK();
6944         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
6945         return (0);
6946 }