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                             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                                     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                                     sctp_ifnp, 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", 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                             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", retval, 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", 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                                 /*
2762                                  * For LOOPBACK the prison_local_ip6() call
2763                                  * will transmute the ipv6 address to the
2764                                  * proper value.
2765                                  */
2766                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2767                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2768                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2769                                         return (error);
2770                                 }
2771                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2772                                         bindall = 0;
2773                                         /* KAME hack: embed scopeid */
2774                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2775                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2776                                                 return (EINVAL);
2777                                         }
2778                                 }
2779                                 /* this must be cleared for ifa_ifwithaddr() */
2780                                 sin6->sin6_scope_id = 0;
2781                                 break;
2782                         }
2783 #endif
2784                 default:
2785                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2786                         return (EAFNOSUPPORT);
2787                 }
2788         }
2789         SCTP_INP_INFO_WLOCK();
2790         SCTP_INP_WLOCK(inp);
2791         /* Setup a vrf_id to be the default for the non-bind-all case. */
2792         vrf_id = inp->def_vrf_id;
2793
2794         /* increase our count due to the unlock we do */
2795         SCTP_INP_INCR_REF(inp);
2796         if (lport) {
2797                 /*
2798                  * Did the caller specify a port? if so we must see if a ep
2799                  * already has this one bound.
2800                  */
2801                 /* got to be root to get at low ports */
2802                 if (ntohs(lport) < IPPORT_RESERVED) {
2803                         if (p && (error =
2804                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2805                             )) {
2806                                 SCTP_INP_DECR_REF(inp);
2807                                 SCTP_INP_WUNLOCK(inp);
2808                                 SCTP_INP_INFO_WUNLOCK();
2809                                 return (error);
2810                         }
2811                 }
2812                 if (p == NULL) {
2813                         SCTP_INP_DECR_REF(inp);
2814                         SCTP_INP_WUNLOCK(inp);
2815                         SCTP_INP_INFO_WUNLOCK();
2816                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2817                         return (error);
2818                 }
2819                 SCTP_INP_WUNLOCK(inp);
2820                 if (bindall) {
2821                         vrf_id = inp->def_vrf_id;
2822                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2823                         if (inp_tmp != NULL) {
2824                                 /*
2825                                  * lock guy returned and lower count note
2826                                  * that we are not bound so inp_tmp should
2827                                  * NEVER be inp. And it is this inp
2828                                  * (inp_tmp) that gets the reference bump,
2829                                  * so we must lower it.
2830                                  */
2831                                 SCTP_INP_DECR_REF(inp_tmp);
2832                                 /* unlock info */
2833                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2834                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2835                                         /*
2836                                          * Ok, must be one-2-one and
2837                                          * allowing port re-use
2838                                          */
2839                                         port_reuse_active = 1;
2840                                         goto continue_anyway;
2841                                 }
2842                                 SCTP_INP_DECR_REF(inp);
2843                                 SCTP_INP_INFO_WUNLOCK();
2844                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2845                                 return (EADDRINUSE);
2846                         }
2847                 } else {
2848                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2849                         if (inp_tmp != NULL) {
2850                                 /*
2851                                  * lock guy returned and lower count note
2852                                  * that we are not bound so inp_tmp should
2853                                  * NEVER be inp. And it is this inp
2854                                  * (inp_tmp) that gets the reference bump,
2855                                  * so we must lower it.
2856                                  */
2857                                 SCTP_INP_DECR_REF(inp_tmp);
2858                                 /* unlock info */
2859                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2860                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2861                                         /*
2862                                          * Ok, must be one-2-one and
2863                                          * allowing port re-use
2864                                          */
2865                                         port_reuse_active = 1;
2866                                         goto continue_anyway;
2867                                 }
2868                                 SCTP_INP_DECR_REF(inp);
2869                                 SCTP_INP_INFO_WUNLOCK();
2870                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2871                                 return (EADDRINUSE);
2872                         }
2873                 }
2874 continue_anyway:
2875                 SCTP_INP_WLOCK(inp);
2876                 if (bindall) {
2877                         /* verify that no lport is not used by a singleton */
2878                         if ((port_reuse_active == 0) &&
2879                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))
2880                             ) {
2881                                 /* Sorry someone already has this one bound */
2882                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2883                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2884                                         port_reuse_active = 1;
2885                                 } else {
2886                                         SCTP_INP_DECR_REF(inp);
2887                                         SCTP_INP_WUNLOCK(inp);
2888                                         SCTP_INP_INFO_WUNLOCK();
2889                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2890                                         return (EADDRINUSE);
2891                                 }
2892                         }
2893                 }
2894         } else {
2895                 uint16_t first, last, candidate;
2896                 uint16_t count;
2897                 int done;
2898
2899                 if (ip_inp->inp_flags & INP_HIGHPORT) {
2900                         first = MODULE_GLOBAL(ipport_hifirstauto);
2901                         last = MODULE_GLOBAL(ipport_hilastauto);
2902                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2903                         if (p && (error =
2904                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2905                             )) {
2906                                 SCTP_INP_DECR_REF(inp);
2907                                 SCTP_INP_WUNLOCK(inp);
2908                                 SCTP_INP_INFO_WUNLOCK();
2909                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2910                                 return (error);
2911                         }
2912                         first = MODULE_GLOBAL(ipport_lowfirstauto);
2913                         last = MODULE_GLOBAL(ipport_lowlastauto);
2914                 } else {
2915                         first = MODULE_GLOBAL(ipport_firstauto);
2916                         last = MODULE_GLOBAL(ipport_lastauto);
2917                 }
2918                 if (first > last) {
2919                         uint16_t temp;
2920
2921                         temp = first;
2922                         first = last;
2923                         last = temp;
2924                 }
2925                 count = last - first + 1;       /* number of candidates */
2926                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2927
2928                 done = 0;
2929                 while (!done) {
2930                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
2931                                 done = 1;
2932                         }
2933                         if (!done) {
2934                                 if (--count == 0) {
2935                                         SCTP_INP_DECR_REF(inp);
2936                                         SCTP_INP_WUNLOCK(inp);
2937                                         SCTP_INP_INFO_WUNLOCK();
2938                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2939                                         return (EADDRINUSE);
2940                                 }
2941                                 if (candidate == last)
2942                                         candidate = first;
2943                                 else
2944                                         candidate = candidate + 1;
2945                         }
2946                 }
2947                 lport = htons(candidate);
2948         }
2949         SCTP_INP_DECR_REF(inp);
2950         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2951             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2952                 /*
2953                  * this really should not happen. The guy did a non-blocking
2954                  * bind and then did a close at the same time.
2955                  */
2956                 SCTP_INP_WUNLOCK(inp);
2957                 SCTP_INP_INFO_WUNLOCK();
2958                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2959                 return (EINVAL);
2960         }
2961         /* ok we look clear to give out this port, so lets setup the binding */
2962         if (bindall) {
2963                 /* binding to all addresses, so just set in the proper flags */
2964                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
2965                 /* set the automatic addr changes from kernel flag */
2966                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
2967                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2968                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2969                 } else {
2970                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2971                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2972                 }
2973                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
2974                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2975                 } else {
2976                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2977                 }
2978                 /*
2979                  * set the automatic mobility_base from kernel flag (by
2980                  * micchie)
2981                  */
2982                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
2983                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
2984                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2985                 } else {
2986                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
2987                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2988                 }
2989                 /*
2990                  * set the automatic mobility_fasthandoff from kernel flag
2991                  * (by micchie)
2992                  */
2993                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
2994                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
2995                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2996                 } else {
2997                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
2998                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2999                 }
3000         } else {
3001                 /*
3002                  * bind specific, make sure flags is off and add a new
3003                  * address structure to the sctp_addr_list inside the ep
3004                  * structure.
3005                  *
3006                  * We will need to allocate one and insert it at the head. The
3007                  * socketopt call can just insert new addresses in there as
3008                  * well. It will also have to do the embed scope kame hack
3009                  * too (before adding).
3010                  */
3011                 struct sctp_ifa *ifa;
3012                 struct sockaddr_storage store_sa;
3013
3014                 memset(&store_sa, 0, sizeof(store_sa));
3015                 switch (addr->sa_family) {
3016                 case AF_INET:
3017                         {
3018                                 struct sockaddr_in *sin;
3019
3020                                 sin = (struct sockaddr_in *)&store_sa;
3021                                 memcpy(sin, addr, sizeof(struct sockaddr_in));
3022                                 sin->sin_port = 0;
3023                                 break;
3024                         }
3025                 case AF_INET6:
3026                         {
3027                                 struct sockaddr_in6 *sin6;
3028
3029                                 sin6 = (struct sockaddr_in6 *)&store_sa;
3030                                 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3031                                 sin6->sin6_port = 0;
3032                                 break;
3033                         }
3034                 default:
3035                         break;
3036                 }
3037                 /*
3038                  * first find the interface with the bound address need to
3039                  * zero out the port to find the address! yuck! can't do
3040                  * this earlier since need port for sctp_pcb_findep()
3041                  */
3042                 if (sctp_ifap != NULL)
3043                         ifa = sctp_ifap;
3044                 else {
3045                         /*
3046                          * Note for BSD we hit here always other O/S's will
3047                          * pass things in via the sctp_ifap argument
3048                          * (Panda).
3049                          */
3050                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3051                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3052                 }
3053                 if (ifa == NULL) {
3054                         /* Can't find an interface with that address */
3055                         SCTP_INP_WUNLOCK(inp);
3056                         SCTP_INP_INFO_WUNLOCK();
3057                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3058                         return (EADDRNOTAVAIL);
3059                 }
3060 #ifdef INET6
3061                 if (addr->sa_family == AF_INET6) {
3062                         /* GAK, more FIXME IFA lock? */
3063                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3064                                 /* Can't bind a non-existent addr. */
3065                                 SCTP_INP_WUNLOCK(inp);
3066                                 SCTP_INP_INFO_WUNLOCK();
3067                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3068                                 return (EINVAL);
3069                         }
3070                 }
3071 #endif
3072                 /* we're not bound all */
3073                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3074                 /* allow bindx() to send ASCONF's for binding changes */
3075                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3076                 /* clear automatic addr changes from kernel flag */
3077                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3078
3079                 /* add this address to the endpoint list */
3080                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3081                 if (error != 0) {
3082                         SCTP_INP_WUNLOCK(inp);
3083                         SCTP_INP_INFO_WUNLOCK();
3084                         return (error);
3085                 }
3086                 inp->laddr_count++;
3087         }
3088         /* find the bucket */
3089         if (port_reuse_active) {
3090                 /* Put it into tcp 1-2-1 hash */
3091                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3092                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3093         } else {
3094                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3095         }
3096         /* put it in the bucket */
3097         LIST_INSERT_HEAD(head, inp, sctp_hash);
3098         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3099             head, ntohs(lport), port_reuse_active);
3100         /* set in the port */
3101         inp->sctp_lport = lport;
3102
3103         /* turn off just the unbound flag */
3104         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3105         SCTP_INP_WUNLOCK(inp);
3106         SCTP_INP_INFO_WUNLOCK();
3107         return (0);
3108 }
3109
3110
3111 static void
3112 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3113 {
3114         struct sctp_iterator *it, *nit;
3115
3116         /*
3117          * We enter with the only the ITERATOR_LOCK in place and a write
3118          * lock on the inp_info stuff.
3119          */
3120         it = sctp_it_ctl.cur_it;
3121         if (it && (it->vn != curvnet)) {
3122                 /* Its not looking at our VNET */
3123                 return;
3124         }
3125         if (it && (it->inp == inp)) {
3126                 /*
3127                  * This is tricky and we hold the iterator lock, but when it
3128                  * returns and gets the lock (when we release it) the
3129                  * iterator will try to operate on inp. We need to stop that
3130                  * from happening. But of course the iterator has a
3131                  * reference on the stcb and inp. We can mark it and it will
3132                  * stop.
3133                  *
3134                  * If its a single iterator situation, we set the end iterator
3135                  * flag. Otherwise we set the iterator to go to the next
3136                  * inp.
3137                  *
3138                  */
3139                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3140                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3141                 } else {
3142                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3143                 }
3144         }
3145         /*
3146          * Now go through and remove any single reference to our inp that
3147          * may be still pending on the list
3148          */
3149         SCTP_IPI_ITERATOR_WQ_LOCK();
3150         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3151                 if (it->vn != curvnet) {
3152                         continue;
3153                 }
3154                 if (it->inp == inp) {
3155                         /* This one points to me is it inp specific? */
3156                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3157                                 /* Remove and free this one */
3158                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3159                                     it, sctp_nxt_itr);
3160                                 if (it->function_atend != NULL) {
3161                                         (*it->function_atend) (it->pointer, it->val);
3162                                 }
3163                                 SCTP_FREE(it, SCTP_M_ITER);
3164                         } else {
3165                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3166                                 if (it->inp) {
3167                                         SCTP_INP_INCR_REF(it->inp);
3168                                 }
3169                         }
3170                         /*
3171                          * When its put in the refcnt is incremented so decr
3172                          * it
3173                          */
3174                         SCTP_INP_DECR_REF(inp);
3175                 }
3176         }
3177         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3178 }
3179
3180 /* release sctp_inpcb unbind the port */
3181 void
3182 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3183 {
3184         /*
3185          * Here we free a endpoint. We must find it (if it is in the Hash
3186          * table) and remove it from there. Then we must also find it in the
3187          * overall list and remove it from there. After all removals are
3188          * complete then any timer has to be stopped. Then start the actual
3189          * freeing. a) Any local lists. b) Any associations. c) The hash of
3190          * all associations. d) finally the ep itself.
3191          */
3192         struct sctp_tcb *asoc, *nasoc;
3193         struct sctp_laddr *laddr, *nladdr;
3194         struct inpcb *ip_pcb;
3195         struct socket *so;
3196         int being_refed = 0;
3197         struct sctp_queued_to_read *sq, *nsq;
3198         int cnt;
3199         sctp_sharedkey_t *shared_key, *nshared_key;
3200
3201
3202 #ifdef SCTP_LOG_CLOSING
3203         sctp_log_closing(inp, NULL, 0);
3204 #endif
3205         SCTP_ITERATOR_LOCK();
3206         /* mark any iterators on the list or being processed */
3207         sctp_iterator_inp_being_freed(inp);
3208         SCTP_ITERATOR_UNLOCK();
3209         so = inp->sctp_socket;
3210         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3211                 /* been here before.. eeks.. get out of here */
3212                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3213 #ifdef SCTP_LOG_CLOSING
3214                 sctp_log_closing(inp, NULL, 1);
3215 #endif
3216                 return;
3217         }
3218         SCTP_ASOC_CREATE_LOCK(inp);
3219         SCTP_INP_INFO_WLOCK();
3220
3221         SCTP_INP_WLOCK(inp);
3222         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3223                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3224                 /* socket is gone, so no more wakeups allowed */
3225                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3226                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3227                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3228
3229         }
3230         /* First time through we have the socket lock, after that no more. */
3231         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3232             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3233
3234         if (inp->control) {
3235                 sctp_m_freem(inp->control);
3236                 inp->control = NULL;
3237         }
3238         if (inp->pkt) {
3239                 sctp_m_freem(inp->pkt);
3240                 inp->pkt = NULL;
3241         }
3242         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3243                                          * here but I will be nice :> (i.e.
3244                                          * ip_pcb = ep;) */
3245         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3246                 int cnt_in_sd;
3247
3248                 cnt_in_sd = 0;
3249                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3250                         SCTP_TCB_LOCK(asoc);
3251                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3252                                 /* Skip guys being freed */
3253                                 cnt_in_sd++;
3254                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3255                                         /*
3256                                          * Special case - we did not start a
3257                                          * kill timer on the asoc due to it
3258                                          * was not closed. So go ahead and
3259                                          * start it now.
3260                                          */
3261                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3262                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3263                                 }
3264                                 SCTP_TCB_UNLOCK(asoc);
3265                                 continue;
3266                         }
3267                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3268                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3269                             (asoc->asoc.total_output_queue_size == 0)) {
3270                                 /*
3271                                  * If we have data in queue, we don't want
3272                                  * to just free since the app may have done,
3273                                  * send()/close or connect/send/close. And
3274                                  * it wants the data to get across first.
3275                                  */
3276                                 /* Just abandon things in the front states */
3277                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3278                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3279                                         cnt_in_sd++;
3280                                 }
3281                                 continue;
3282                         }
3283                         /* Disconnect the socket please */
3284                         asoc->sctp_socket = NULL;
3285                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3286                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3287                             (asoc->asoc.control_pdapi) ||
3288                             (asoc->asoc.size_on_all_streams > 0) ||
3289                             (so && (so->so_rcv.sb_cc > 0))) {
3290                                 /* Left with Data unread */
3291                                 struct mbuf *op_err;
3292
3293                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3294                                     0, M_DONTWAIT, 1, MT_DATA);
3295                                 if (op_err) {
3296                                         /* Fill in the user initiated abort */
3297                                         struct sctp_paramhdr *ph;
3298                                         uint32_t *ippp;
3299
3300                                         SCTP_BUF_LEN(op_err) =
3301                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
3302                                         ph = mtod(op_err,
3303                                             struct sctp_paramhdr *);
3304                                         ph->param_type = htons(
3305                                             SCTP_CAUSE_USER_INITIATED_ABT);
3306                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
3307                                         ippp = (uint32_t *) (ph + 1);
3308                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
3309                                 }
3310                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3311                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3312                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3313                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3314                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3315                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3316                                 }
3317                                 if (sctp_free_assoc(inp, asoc,
3318                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3319                                         cnt_in_sd++;
3320                                 }
3321                                 continue;
3322                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3323                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3324                                     (asoc->asoc.stream_queue_cnt == 0)
3325                             ) {
3326                                 if (asoc->asoc.locked_on_sending) {
3327                                         goto abort_anyway;
3328                                 }
3329                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3330                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3331                                         struct sctp_nets *netp;
3332
3333                                         if (asoc->asoc.alternate) {
3334                                                 netp = asoc->asoc.alternate;
3335                                         } else {
3336                                                 netp = asoc->asoc.primary_destination;
3337                                         }
3338                                         /*
3339                                          * there is nothing queued to send,
3340                                          * so I send shutdown
3341                                          */
3342                                         sctp_send_shutdown(asoc, netp);
3343                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3344                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3345                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3346                                         }
3347                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3348                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3349                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3350                                             netp);
3351                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3352                                             asoc->asoc.primary_destination);
3353                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3354                                 }
3355                         } else {
3356                                 /* mark into shutdown pending */
3357                                 struct sctp_stream_queue_pending *sp;
3358
3359                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3360                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3361                                     asoc->asoc.primary_destination);
3362                                 if (asoc->asoc.locked_on_sending) {
3363                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3364                                             sctp_streamhead);
3365                                         if (sp == NULL) {
3366                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3367                                                     asoc->asoc.locked_on_sending,
3368                                                     asoc->asoc.locked_on_sending->stream_no);
3369                                         } else {
3370                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3371                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3372                                         }
3373                                 }
3374                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3375                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3376                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3377                                         struct mbuf *op_err;
3378
3379                         abort_anyway:
3380                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3381                                             0, M_DONTWAIT, 1, MT_DATA);
3382                                         if (op_err) {
3383                                                 /*
3384                                                  * Fill in the user
3385                                                  * initiated abort
3386                                                  */
3387                                                 struct sctp_paramhdr *ph;
3388                                                 uint32_t *ippp;
3389
3390                                                 SCTP_BUF_LEN(op_err) =
3391                                                     (sizeof(struct sctp_paramhdr) +
3392                                                     sizeof(uint32_t));
3393                                                 ph = mtod(op_err,
3394                                                     struct sctp_paramhdr *);
3395                                                 ph->param_type = htons(
3396                                                     SCTP_CAUSE_USER_INITIATED_ABT);
3397                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3398                                                 ippp = (uint32_t *) (ph + 1);
3399                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
3400                                         }
3401                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3402                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3403                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3404                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3405                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3406                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3407                                         }
3408                                         if (sctp_free_assoc(inp, asoc,
3409                                             SCTP_PCBFREE_NOFORCE,
3410                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3411                                                 cnt_in_sd++;
3412                                         }
3413                                         continue;
3414                                 } else {
3415                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3416                                 }
3417                         }
3418                         cnt_in_sd++;
3419                         SCTP_TCB_UNLOCK(asoc);
3420                 }
3421                 /* now is there some left in our SHUTDOWN state? */
3422                 if (cnt_in_sd) {
3423 #ifdef SCTP_LOG_CLOSING
3424                         sctp_log_closing(inp, NULL, 2);
3425 #endif
3426                         inp->sctp_socket = NULL;
3427                         SCTP_INP_WUNLOCK(inp);
3428                         SCTP_ASOC_CREATE_UNLOCK(inp);
3429                         SCTP_INP_INFO_WUNLOCK();
3430                         return;
3431                 }
3432         }
3433         inp->sctp_socket = NULL;
3434         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3435             SCTP_PCB_FLAGS_UNBOUND) {
3436                 /*
3437                  * ok, this guy has been bound. It's port is somewhere in
3438                  * the SCTP_BASE_INFO(hash table). Remove it!
3439                  */
3440                 LIST_REMOVE(inp, sctp_hash);
3441                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3442         }
3443         /*
3444          * If there is a timer running to kill us, forget it, since it may
3445          * have a contest on the INP lock.. which would cause us to die ...
3446          */
3447         cnt = 0;
3448         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3449                 SCTP_TCB_LOCK(asoc);
3450                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3451                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3452                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3453                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3454                         }
3455                         cnt++;
3456                         SCTP_TCB_UNLOCK(asoc);
3457                         continue;
3458                 }
3459                 /* Free associations that are NOT killing us */
3460                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3461                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3462                         struct mbuf *op_err;
3463                         uint32_t *ippp;
3464
3465                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3466                             0, M_DONTWAIT, 1, MT_DATA);
3467                         if (op_err) {
3468                                 /* Fill in the user initiated abort */
3469                                 struct sctp_paramhdr *ph;
3470
3471                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
3472                                     sizeof(uint32_t));
3473                                 ph = mtod(op_err, struct sctp_paramhdr *);
3474                                 ph->param_type = htons(
3475                                     SCTP_CAUSE_USER_INITIATED_ABT);
3476                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3477                                 ippp = (uint32_t *) (ph + 1);
3478                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
3479
3480                         }
3481                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3482                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3483                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3484                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3485                         cnt++;
3486                         SCTP_TCB_UNLOCK(asoc);
3487                         continue;
3488                 }
3489                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3490                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3491                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3492                 }
3493                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3494                         cnt++;
3495                 }
3496         }
3497         if (cnt) {
3498                 /* Ok we have someone out there that will kill us */
3499                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3500 #ifdef SCTP_LOG_CLOSING
3501                 sctp_log_closing(inp, NULL, 3);
3502 #endif
3503                 SCTP_INP_WUNLOCK(inp);
3504                 SCTP_ASOC_CREATE_UNLOCK(inp);
3505                 SCTP_INP_INFO_WUNLOCK();
3506                 return;
3507         }
3508         if (SCTP_INP_LOCK_CONTENDED(inp))
3509                 being_refed++;
3510         if (SCTP_INP_READ_CONTENDED(inp))
3511                 being_refed++;
3512         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3513                 being_refed++;
3514
3515         if ((inp->refcount) ||
3516             (being_refed) ||
3517             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3518                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3519 #ifdef SCTP_LOG_CLOSING
3520                 sctp_log_closing(inp, NULL, 4);
3521 #endif
3522                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3523                 SCTP_INP_WUNLOCK(inp);
3524                 SCTP_ASOC_CREATE_UNLOCK(inp);
3525                 SCTP_INP_INFO_WUNLOCK();
3526                 return;
3527         }
3528         inp->sctp_ep.signature_change.type = 0;
3529         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3530         /*
3531          * Remove it from the list .. last thing we need a lock for.
3532          */
3533         LIST_REMOVE(inp, sctp_list);
3534         SCTP_INP_WUNLOCK(inp);
3535         SCTP_ASOC_CREATE_UNLOCK(inp);
3536         SCTP_INP_INFO_WUNLOCK();
3537         /*
3538          * Now we release all locks. Since this INP cannot be found anymore
3539          * except possibly by the kill timer that might be running. We call
3540          * the drain function here. It should hit the case were it sees the
3541          * ACTIVE flag cleared and exit out freeing us to proceed and
3542          * destroy everything.
3543          */
3544         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3545                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3546         } else {
3547                 /* Probably un-needed */
3548                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3549         }
3550
3551 #ifdef SCTP_LOG_CLOSING
3552         sctp_log_closing(inp, NULL, 5);
3553 #endif
3554
3555
3556         if ((inp->sctp_asocidhash) != NULL) {
3557                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3558                 inp->sctp_asocidhash = NULL;
3559         }
3560         /* sa_ignore FREED_MEMORY */
3561         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3562                 /* Its only abandoned if it had data left */
3563                 if (sq->length)
3564                         SCTP_STAT_INCR(sctps_left_abandon);
3565
3566                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3567                 sctp_free_remote_addr(sq->whoFrom);
3568                 if (so)
3569                         so->so_rcv.sb_cc -= sq->length;
3570                 if (sq->data) {
3571                         sctp_m_freem(sq->data);
3572                         sq->data = NULL;
3573                 }
3574                 /*
3575                  * no need to free the net count, since at this point all
3576                  * assoc's are gone.
3577                  */
3578                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3579                 SCTP_DECR_READQ_COUNT();
3580         }
3581         /* Now the sctp_pcb things */
3582         /*
3583          * free each asoc if it is not already closed/free. we can't use the
3584          * macro here since le_next will get freed as part of the
3585          * sctp_free_assoc() call.
3586          */
3587         if (so) {
3588 #ifdef IPSEC
3589                 ipsec_delete_pcbpolicy(ip_pcb);
3590 #endif                          /* IPSEC */
3591
3592                 /* Unlocks not needed since the socket is gone now */
3593         }
3594         if (ip_pcb->inp_options) {
3595                 (void)sctp_m_free(ip_pcb->inp_options);
3596                 ip_pcb->inp_options = 0;
3597         }
3598 #ifdef INET6
3599         if (ip_pcb->inp_vflag & INP_IPV6) {
3600                 struct in6pcb *in6p;
3601
3602                 in6p = (struct in6pcb *)inp;
3603                 ip6_freepcbopts(in6p->in6p_outputopts);
3604         }
3605 #endif                          /* INET6 */
3606         ip_pcb->inp_vflag = 0;
3607         /* free up authentication fields */
3608         if (inp->sctp_ep.local_auth_chunks != NULL)
3609                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3610         if (inp->sctp_ep.local_hmacs != NULL)
3611                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3612
3613         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3614                 LIST_REMOVE(shared_key, next);
3615                 sctp_free_sharedkey(shared_key);
3616                 /* sa_ignore FREED_MEMORY */
3617         }
3618
3619         /*
3620          * if we have an address list the following will free the list of
3621          * ifaddr's that are set into this ep. Again macro limitations here,
3622          * since the LIST_FOREACH could be a bad idea.
3623          */
3624         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3625                 sctp_remove_laddr(laddr);
3626         }
3627
3628 #ifdef SCTP_TRACK_FREED_ASOCS
3629         /* TEMP CODE */
3630         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3631                 LIST_REMOVE(asoc, sctp_tcblist);
3632                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3633                 SCTP_DECR_ASOC_COUNT();
3634         }
3635         /* *** END TEMP CODE *** */
3636 #endif
3637         /* Now lets see about freeing the EP hash table. */
3638         if (inp->sctp_tcbhash != NULL) {
3639                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3640                 inp->sctp_tcbhash = NULL;
3641         }
3642         /* Now we must put the ep memory back into the zone pool */
3643         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3644         SCTP_INP_LOCK_DESTROY(inp);
3645         SCTP_INP_READ_DESTROY(inp);
3646         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3647         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3648         SCTP_DECR_EP_COUNT();
3649 }
3650
3651
3652 struct sctp_nets *
3653 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3654 {
3655         struct sctp_nets *net;
3656
3657         /* locate the address */
3658         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3659                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3660                         return (net);
3661         }
3662         return (NULL);
3663 }
3664
3665
3666 int
3667 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3668 {
3669         struct sctp_ifa *sctp_ifa;
3670
3671         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3672         if (sctp_ifa) {
3673                 return (1);
3674         } else {
3675                 return (0);
3676         }
3677 }
3678
3679 /*
3680  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3681  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3682  * stats of stuff.
3683  */
3684 int
3685 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3686     struct sctp_nets **netp, int set_scope, int from)
3687 {
3688         /*
3689          * The following is redundant to the same lines in the
3690          * sctp_aloc_assoc() but is needed since others call the add address
3691          * function
3692          */
3693         struct sctp_nets *net, *netfirst;
3694         int addr_inscope;
3695
3696         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3697             from);
3698         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3699
3700         netfirst = sctp_findnet(stcb, newaddr);
3701         if (netfirst) {
3702                 /*
3703                  * Lie and return ok, we don't want to make the association
3704                  * go away for this behavior. It will happen in the TCP
3705                  * model in a connected socket. It does not reach the hash
3706                  * table until after the association is built so it can't be
3707                  * found. Mark as reachable, since the initial creation will
3708                  * have been cleared and the NOT_IN_ASSOC flag will have
3709                  * been added... and we don't want to end up removing it
3710                  * back out.
3711                  */
3712                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3713                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3714                             SCTP_ADDR_UNCONFIRMED);
3715                 } else {
3716                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3717                 }
3718
3719                 return (0);
3720         }
3721         addr_inscope = 1;
3722         switch (newaddr->sa_family) {
3723 #ifdef INET
3724         case AF_INET:
3725                 {
3726                         struct sockaddr_in *sin;
3727
3728                         sin = (struct sockaddr_in *)newaddr;
3729                         if (sin->sin_addr.s_addr == 0) {
3730                                 /* Invalid address */
3731                                 return (-1);
3732                         }
3733                         /* zero out the bzero area */
3734                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3735
3736                         /* assure len is set */
3737                         sin->sin_len = sizeof(struct sockaddr_in);
3738                         if (set_scope) {
3739 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3740                                 stcb->ipv4_local_scope = 1;
3741 #else
3742                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3743                                         stcb->asoc.ipv4_local_scope = 1;
3744                                 }
3745 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3746                         } else {
3747                                 /* Validate the address is in scope */
3748                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3749                                     (stcb->asoc.ipv4_local_scope == 0)) {
3750                                         addr_inscope = 0;
3751                                 }
3752                         }
3753                         break;
3754                 }
3755 #endif
3756 #ifdef INET6
3757         case AF_INET6:
3758                 {
3759                         struct sockaddr_in6 *sin6;
3760
3761                         sin6 = (struct sockaddr_in6 *)newaddr;
3762                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3763                                 /* Invalid address */
3764                                 return (-1);
3765                         }
3766                         /* assure len is set */
3767                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3768                         if (set_scope) {
3769                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3770                                         stcb->asoc.loopback_scope = 1;
3771                                         stcb->asoc.local_scope = 0;
3772                                         stcb->asoc.ipv4_local_scope = 1;
3773                                         stcb->asoc.site_scope = 1;
3774                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3775                                         /*
3776                                          * If the new destination is a
3777                                          * LINK_LOCAL we must have common
3778                                          * site scope. Don't set the local
3779                                          * scope since we may not share all
3780                                          * links, only loopback can do this.
3781                                          * Links on the local network would
3782                                          * also be on our private network
3783                                          * for v4 too.
3784                                          */
3785                                         stcb->asoc.ipv4_local_scope = 1;
3786                                         stcb->asoc.site_scope = 1;
3787                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3788                                         /*
3789                                          * If the new destination is
3790                                          * SITE_LOCAL then we must have site
3791                                          * scope in common.
3792                                          */
3793                                         stcb->asoc.site_scope = 1;
3794                                 }
3795                         } else {
3796                                 /* Validate the address is in scope */
3797                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3798                                     (stcb->asoc.loopback_scope == 0)) {
3799                                         addr_inscope = 0;
3800                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3801                                     (stcb->asoc.local_scope == 0)) {
3802                                         addr_inscope = 0;
3803                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3804                                     (stcb->asoc.site_scope == 0)) {
3805                                         addr_inscope = 0;
3806                                 }
3807                         }
3808                         break;
3809                 }
3810 #endif
3811         default:
3812                 /* not supported family type */
3813                 return (-1);
3814         }
3815         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3816         if (net == NULL) {
3817                 return (-1);
3818         }
3819         SCTP_INCR_RADDR_COUNT();
3820         bzero(net, sizeof(struct sctp_nets));
3821         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3822         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3823         switch (newaddr->sa_family) {
3824 #ifdef INET
3825         case AF_INET:
3826                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3827                 break;
3828 #endif
3829 #ifdef INET6
3830         case AF_INET6:
3831                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3832                 break;
3833 #endif
3834         default:
3835                 break;
3836         }
3837         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3838         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3839                 stcb->asoc.loopback_scope = 1;
3840                 stcb->asoc.ipv4_local_scope = 1;
3841                 stcb->asoc.local_scope = 0;
3842                 stcb->asoc.site_scope = 1;
3843                 addr_inscope = 1;
3844         }
3845         net->failure_threshold = stcb->asoc.def_net_failure;
3846         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3847         if (addr_inscope == 0) {
3848                 net->dest_state = (SCTP_ADDR_REACHABLE |
3849                     SCTP_ADDR_OUT_OF_SCOPE);
3850         } else {
3851                 if (from == SCTP_ADDR_IS_CONFIRMED)
3852                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3853                         net->dest_state = SCTP_ADDR_REACHABLE;
3854                 else
3855                         net->dest_state = SCTP_ADDR_REACHABLE |
3856                             SCTP_ADDR_UNCONFIRMED;
3857         }
3858         /*
3859          * We set this to 0, the timer code knows that this means its an
3860          * initial value
3861          */
3862         net->rto_needed = 1;
3863         net->RTO = 0;
3864         net->RTO_measured = 0;
3865         stcb->asoc.numnets++;
3866         net->ref_count = 1;
3867         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3868         net->port = stcb->asoc.port;
3869         net->dscp = stcb->asoc.default_dscp;
3870 #ifdef INET6
3871         net->flowlabel = stcb->asoc.default_flowlabel;
3872 #endif
3873         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3874                 net->dest_state |= SCTP_ADDR_NOHB;
3875         } else {
3876                 net->dest_state &= ~SCTP_ADDR_NOHB;
3877         }
3878         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3879                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3880         } else {
3881                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3882         }
3883         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3884         /* Init the timer structure */
3885         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3886         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3887         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3888
3889         /* Now generate a route for this guy */
3890 #ifdef INET6
3891         /* KAME hack: embed scopeid */
3892         if (newaddr->sa_family == AF_INET6) {
3893                 struct sockaddr_in6 *sin6;
3894
3895                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3896                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3897                 sin6->sin6_scope_id = 0;
3898         }
3899 #endif
3900         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3901
3902         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3903                 /* Get source address */
3904                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3905                     stcb,
3906                     (sctp_route_t *) & net->ro,
3907                     net,
3908                     0,
3909                     stcb->asoc.vrf_id);
3910                 /* Now get the interface MTU */
3911                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3912                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3913                 }
3914                 if (net->mtu > 0) {
3915                         uint32_t rmtu;
3916
3917                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3918                         if (rmtu == 0) {
3919                                 /*
3920                                  * Start things off to match mtu of
3921                                  * interface please.
3922                                  */
3923                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3924                                     net->ro.ro_rt, net->mtu);
3925                         } else {
3926                                 /*
3927                                  * we take the route mtu over the interface,
3928                                  * since the route may be leading out the
3929                                  * loopback, or a different interface.
3930                                  */
3931                                 net->mtu = rmtu;
3932                         }
3933                 }
3934         }
3935         if (net->mtu == 0) {
3936                 switch (newaddr->sa_family) {
3937 #ifdef INET
3938                 case AF_INET:
3939                         net->mtu = SCTP_DEFAULT_MTU;
3940                         break;
3941 #endif
3942 #ifdef INET6
3943                 case AF_INET6:
3944                         net->mtu = 1280;
3945                         break;
3946 #endif
3947                 default:
3948                         break;
3949                 }
3950         }
3951         if (net->port) {
3952                 net->mtu -= (uint32_t) sizeof(struct udphdr);
3953         }
3954         if (from == SCTP_ALLOC_ASOC) {
3955                 stcb->asoc.smallest_mtu = net->mtu;
3956         }
3957         if (stcb->asoc.smallest_mtu > net->mtu) {
3958                 stcb->asoc.smallest_mtu = net->mtu;
3959         }
3960 #ifdef INET6
3961         if (newaddr->sa_family == AF_INET6) {
3962                 struct sockaddr_in6 *sin6;
3963
3964                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3965                 (void)sa6_recoverscope(sin6);
3966         }
3967 #endif
3968
3969         /* JRS - Use the congestion control given in the CC module */
3970         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
3971                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
3972
3973         /*
3974          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3975          * of assoc (2005/06/27, iyengar@cis.udel.edu)
3976          */
3977         net->find_pseudo_cumack = 1;
3978         net->find_rtx_pseudo_cumack = 1;
3979         net->src_addr_selected = 0;
3980         /* Choose an initial flowid. */
3981         net->flowid = stcb->asoc.my_vtag ^
3982             ntohs(stcb->rport) ^
3983             ntohs(stcb->sctp_ep->sctp_lport);
3984 #ifdef INVARIANTS
3985         net->flowidset = 1;
3986 #endif
3987         if (netp) {
3988                 *netp = net;
3989         }
3990         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3991         if (net->ro.ro_rt == NULL) {
3992                 /* Since we have no route put it at the back */
3993                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3994         } else if (netfirst == NULL) {
3995                 /* We are the first one in the pool. */
3996                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3997         } else if (netfirst->ro.ro_rt == NULL) {
3998                 /*
3999                  * First one has NO route. Place this one ahead of the first
4000                  * one.
4001                  */
4002                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4003         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4004                 /*
4005                  * This one has a different interface than the one at the
4006                  * top of the list. Place it ahead.
4007                  */
4008                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4009         } else {
4010                 /*
4011                  * Ok we have the same interface as the first one. Move
4012                  * forward until we find either a) one with a NULL route...
4013                  * insert ahead of that b) one with a different ifp.. insert
4014                  * after that. c) end of the list.. insert at the tail.
4015                  */
4016                 struct sctp_nets *netlook;
4017
4018                 do {
4019                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4020                         if (netlook == NULL) {
4021                                 /* End of the list */
4022                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4023                                 break;
4024                         } else if (netlook->ro.ro_rt == NULL) {
4025                                 /* next one has NO route */
4026                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4027                                 break;
4028                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4029                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4030                                     net, sctp_next);
4031                                 break;
4032                         }
4033                         /* Shift forward */
4034                         netfirst = netlook;
4035                 } while (netlook != NULL);
4036         }
4037
4038         /* got to have a primary set */
4039         if (stcb->asoc.primary_destination == 0) {
4040                 stcb->asoc.primary_destination = net;
4041         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4042                     (net->ro.ro_rt) &&
4043             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4044                 /* No route to current primary adopt new primary */
4045                 stcb->asoc.primary_destination = net;
4046         }
4047         /* Validate primary is first */
4048         net = TAILQ_FIRST(&stcb->asoc.nets);
4049         if ((net != stcb->asoc.primary_destination) &&
4050             (stcb->asoc.primary_destination)) {
4051                 /*
4052                  * first one on the list is NOT the primary sctp_cmpaddr()
4053                  * is much more efficient if the primary is the first on the
4054                  * list, make it so.
4055                  */
4056                 TAILQ_REMOVE(&stcb->asoc.nets,
4057                     stcb->asoc.primary_destination, sctp_next);
4058                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4059                     stcb->asoc.primary_destination, sctp_next);
4060         }
4061         return (0);
4062 }
4063
4064
4065 static uint32_t
4066 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4067 {
4068         uint32_t id;
4069         struct sctpasochead *head;
4070         struct sctp_tcb *lstcb;
4071
4072         SCTP_INP_WLOCK(inp);
4073 try_again:
4074         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4075                 /* TSNH */
4076                 SCTP_INP_WUNLOCK(inp);
4077                 return (0);
4078         }
4079         /*
4080          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4081          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4082          */
4083         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4084                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4085         }
4086         id = inp->sctp_associd_counter;
4087         inp->sctp_associd_counter++;
4088         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4089         if (lstcb) {
4090                 goto try_again;
4091         }
4092         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4093         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4094         stcb->asoc.in_asocid_hash = 1;
4095         SCTP_INP_WUNLOCK(inp);
4096         return id;
4097 }
4098
4099 /*
4100  * allocate an association and add it to the endpoint. The caller must be
4101  * careful to add all additional addresses once they are know right away or
4102  * else the assoc will be may experience a blackout scenario.
4103  */
4104 struct sctp_tcb *
4105 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4106     int *error, uint32_t override_tag, uint32_t vrf_id,
4107     struct thread *p
4108 )
4109 {
4110         /* note the p argument is only valid in unbound sockets */
4111
4112         struct sctp_tcb *stcb;
4113         struct sctp_association *asoc;
4114         struct sctpasochead *head;
4115         uint16_t rport;
4116         int err;
4117
4118         /*
4119          * Assumption made here: Caller has done a
4120          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4121          * address does not exist already.
4122          */
4123         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4124                 /* Hit max assoc, sorry no more */
4125                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4126                 *error = ENOBUFS;
4127                 return (NULL);
4128         }
4129         if (firstaddr == NULL) {
4130                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4131                 *error = EINVAL;
4132                 return (NULL);
4133         }
4134         SCTP_INP_RLOCK(inp);
4135         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4136             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4137             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4138                 /*
4139                  * If its in the TCP pool, its NOT allowed to create an
4140                  * association. The parent listener needs to call
4141                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4142                  * off, or connected one does this.. its an error.
4143                  */
4144                 SCTP_INP_RUNLOCK(inp);
4145                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4146                 *error = EINVAL;
4147                 return (NULL);
4148         }
4149         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4150             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4151                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4152                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4153                         SCTP_INP_RUNLOCK(inp);
4154                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4155                         *error = EINVAL;
4156                         return (NULL);
4157                 }
4158         }
4159         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4160 #ifdef SCTP_DEBUG
4161         if (firstaddr) {
4162                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4163                 switch (firstaddr->sa_family) {
4164 #ifdef INET
4165                 case AF_INET:
4166                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4167                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4168                         break;
4169 #endif
4170 #ifdef INET6
4171                 case AF_INET6:
4172                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4173                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4174                         break;
4175 #endif
4176                 default:
4177                         break;
4178                 }
4179         } else {
4180                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4181         }
4182 #endif                          /* SCTP_DEBUG */
4183         switch (firstaddr->sa_family) {
4184 #ifdef INET
4185         case AF_INET:
4186                 {
4187                         struct sockaddr_in *sin;
4188
4189                         sin = (struct sockaddr_in *)firstaddr;
4190                         if ((ntohs(sin->sin_port) == 0) ||
4191                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4192                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4193                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4194                                 /* Invalid address */
4195                                 SCTP_INP_RUNLOCK(inp);
4196                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4197                                 *error = EINVAL;
4198                                 return (NULL);
4199                         }
4200                         rport = sin->sin_port;
4201                         break;
4202                 }
4203 #endif
4204 #ifdef INET6
4205         case AF_INET6:
4206                 {
4207                         struct sockaddr_in6 *sin6;
4208
4209                         sin6 = (struct sockaddr_in6 *)firstaddr;
4210                         if ((ntohs(sin6->sin6_port) == 0) ||
4211                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4212                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4213                                 /* Invalid address */
4214                                 SCTP_INP_RUNLOCK(inp);
4215                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4216                                 *error = EINVAL;
4217                                 return (NULL);
4218                         }
4219                         rport = sin6->sin6_port;
4220                         break;
4221                 }
4222 #endif
4223         default:
4224                 /* not supported family type */
4225                 SCTP_INP_RUNLOCK(inp);
4226                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4227                 *error = EINVAL;
4228                 return (NULL);
4229         }
4230         SCTP_INP_RUNLOCK(inp);
4231         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4232                 /*
4233                  * If you have not performed a bind, then we need to do the
4234                  * ephemeral bind for you.
4235                  */
4236                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4237                     (struct sockaddr *)NULL,
4238                     (struct sctp_ifa *)NULL,
4239                     p
4240                     ))) {
4241                         /* bind error, probably perm */
4242                         *error = err;
4243                         return (NULL);
4244                 }
4245         }
4246         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4247         if (stcb == NULL) {
4248                 /* out of memory? */
4249                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4250                 *error = ENOMEM;
4251                 return (NULL);
4252         }
4253         SCTP_INCR_ASOC_COUNT();
4254
4255         bzero(stcb, sizeof(*stcb));
4256         asoc = &stcb->asoc;
4257
4258         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4259         SCTP_TCB_LOCK_INIT(stcb);
4260         SCTP_TCB_SEND_LOCK_INIT(stcb);
4261         stcb->rport = rport;
4262         /* setup back pointer's */
4263         stcb->sctp_ep = inp;
4264         stcb->sctp_socket = inp->sctp_socket;
4265         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4266                 /* failed */
4267                 SCTP_TCB_LOCK_DESTROY(stcb);
4268                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4269                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4270                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4271                 SCTP_DECR_ASOC_COUNT();
4272                 *error = err;
4273                 return (NULL);
4274         }
4275         /* and the port */
4276         SCTP_INP_INFO_WLOCK();
4277         SCTP_INP_WLOCK(inp);
4278         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4279                 /* inpcb freed while alloc going on */
4280                 SCTP_TCB_LOCK_DESTROY(stcb);
4281                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4282                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4283                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4284                 SCTP_INP_WUNLOCK(inp);
4285                 SCTP_INP_INFO_WUNLOCK();
4286                 SCTP_DECR_ASOC_COUNT();
4287                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4288                 *error = EINVAL;
4289                 return (NULL);
4290         }
4291         SCTP_TCB_LOCK(stcb);
4292
4293         /* now that my_vtag is set, add it to the hash */
4294         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4295         /* put it in the bucket in the vtag hash of assoc's for the system */
4296         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4297         SCTP_INP_INFO_WUNLOCK();
4298
4299         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4300                 /* failure.. memory error? */
4301                 if (asoc->strmout) {
4302                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4303                         asoc->strmout = NULL;
4304                 }
4305                 if (asoc->mapping_array) {
4306                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4307                         asoc->mapping_array = NULL;
4308                 }
4309                 if (asoc->nr_mapping_array) {
4310                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4311                         asoc->nr_mapping_array = NULL;
4312                 }
4313                 SCTP_DECR_ASOC_COUNT();
4314                 SCTP_TCB_LOCK_DESTROY(stcb);
4315                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4316                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4317                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4318                 SCTP_INP_WUNLOCK(inp);
4319                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4320                 *error = ENOBUFS;
4321                 return (NULL);
4322         }
4323         /* Init all the timers */
4324         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4325         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4326         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4327         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4328         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4329         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4330         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4331
4332         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4333         /* now file the port under the hash as well */
4334         if (inp->sctp_tcbhash != NULL) {
4335                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4336                     inp->sctp_hashmark)];
4337                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4338         }
4339         SCTP_INP_WUNLOCK(inp);
4340         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
4341         return (stcb);
4342 }
4343
4344
4345 void
4346 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4347 {
4348         struct sctp_association *asoc;
4349
4350         asoc = &stcb->asoc;
4351         asoc->numnets--;
4352         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4353         if (net == asoc->primary_destination) {
4354                 /* Reset primary */
4355                 struct sctp_nets *lnet;
4356
4357                 lnet = TAILQ_FIRST(&asoc->nets);
4358                 /*
4359                  * Mobility adaptation Ideally, if deleted destination is
4360                  * the primary, it becomes a fast retransmission trigger by
4361                  * the subsequent SET PRIMARY. (by micchie)
4362                  */
4363                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4364                     SCTP_MOBILITY_BASE) ||
4365                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4366                     SCTP_MOBILITY_FASTHANDOFF)) {
4367                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4368                         if (asoc->deleted_primary != NULL) {
4369                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4370                                 goto out;
4371                         }
4372                         asoc->deleted_primary = net;
4373                         atomic_add_int(&net->ref_count, 1);
4374                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4375                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4376                         sctp_mobility_feature_on(stcb->sctp_ep,
4377                             SCTP_MOBILITY_PRIM_DELETED);
4378                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4379                             stcb->sctp_ep, stcb, NULL);
4380                 }
4381 out:
4382                 /* Try to find a confirmed primary */
4383                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4384         }
4385         if (net == asoc->last_data_chunk_from) {
4386                 /* Reset primary */
4387                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4388         }
4389         if (net == asoc->last_control_chunk_from) {
4390                 /* Clear net */
4391                 asoc->last_control_chunk_from = NULL;
4392         }
4393         if (net == stcb->asoc.alternate) {
4394                 sctp_free_remote_addr(stcb->asoc.alternate);
4395                 stcb->asoc.alternate = NULL;
4396         }
4397         sctp_free_remote_addr(net);
4398 }
4399
4400 /*
4401  * remove a remote endpoint address from an association, it will fail if the
4402  * address does not exist.
4403  */
4404 int
4405 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4406 {
4407         /*
4408          * Here we need to remove a remote address. This is quite simple, we
4409          * first find it in the list of address for the association
4410          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4411          * on that item. Note we do not allow it to be removed if there are
4412          * no other addresses.
4413          */
4414         struct sctp_association *asoc;
4415         struct sctp_nets *net, *nnet;
4416
4417         asoc = &stcb->asoc;
4418
4419         /* locate the address */
4420         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4421                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4422                         continue;
4423                 }
4424                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4425                     remaddr)) {
4426                         /* we found the guy */
4427                         if (asoc->numnets < 2) {
4428                                 /* Must have at LEAST two remote addresses */
4429                                 return (-1);
4430                         } else {
4431                                 sctp_remove_net(stcb, net);
4432                                 return (0);
4433                         }
4434                 }
4435         }
4436         /* not found. */
4437         return (-2);
4438 }
4439
4440 void
4441 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4442 {
4443         struct sctpvtaghead *chain;
4444         struct sctp_tagblock *twait_block;
4445         int found = 0;
4446         int i;
4447
4448         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4449         if (!LIST_EMPTY(chain)) {
4450                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4451                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4452                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4453                                     (twait_block->vtag_block[i].lport == lport) &&
4454                                     (twait_block->vtag_block[i].rport == rport)) {
4455                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4456                                         twait_block->vtag_block[i].v_tag = 0;
4457                                         twait_block->vtag_block[i].lport = 0;
4458                                         twait_block->vtag_block[i].rport = 0;
4459                                         found = 1;
4460                                         break;
4461                                 }
4462                         }
4463                         if (found)
4464                                 break;
4465                 }
4466         }
4467 }
4468
4469 int
4470 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4471 {
4472         struct sctpvtaghead *chain;
4473         struct sctp_tagblock *twait_block;
4474         int found = 0;
4475         int i;
4476
4477         SCTP_INP_INFO_WLOCK();
4478         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4479         if (!LIST_EMPTY(chain)) {
4480                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4481                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4482                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4483                                     (twait_block->vtag_block[i].lport == lport) &&
4484                                     (twait_block->vtag_block[i].rport == rport)) {
4485                                         found = 1;
4486                                         break;
4487                                 }
4488                         }
4489                         if (found)
4490                                 break;
4491                 }
4492         }
4493         SCTP_INP_INFO_WUNLOCK();
4494         return (found);
4495 }
4496
4497
4498 void
4499 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4500 {
4501         struct sctpvtaghead *chain;
4502         struct sctp_tagblock *twait_block;
4503         struct timeval now;
4504         int set, i;
4505
4506         if (time == 0) {
4507                 /* Its disabled */
4508                 return;
4509         }
4510         (void)SCTP_GETTIME_TIMEVAL(&now);
4511         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4512         set = 0;
4513         if (!LIST_EMPTY(chain)) {
4514                 /* Block(s) present, lets find space, and expire on the fly */
4515                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4516                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4517                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
4518                                     !set) {
4519                                         twait_block->vtag_block[i].tv_sec_at_expire =
4520                                             now.tv_sec + time;
4521                                         twait_block->vtag_block[i].v_tag = tag;
4522                                         twait_block->vtag_block[i].lport = lport;
4523                                         twait_block->vtag_block[i].rport = rport;
4524                                         set = 1;
4525                                 } else if ((twait_block->vtag_block[i].v_tag) &&
4526                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4527                                         /* Audit expires this guy */
4528                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4529                                         twait_block->vtag_block[i].v_tag = 0;
4530                                         twait_block->vtag_block[i].lport = 0;
4531                                         twait_block->vtag_block[i].rport = 0;
4532                                         if (set == 0) {
4533                                                 /* Reuse it for my new tag */
4534                                                 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4535                                                 twait_block->vtag_block[i].v_tag = tag;
4536                                                 twait_block->vtag_block[i].lport = lport;
4537                                                 twait_block->vtag_block[i].rport = rport;
4538                                                 set = 1;
4539                                         }
4540                                 }
4541                         }
4542                         if (set) {
4543                                 /*
4544                                  * We only do up to the block where we can
4545                                  * place our tag for audits
4546                                  */
4547                                 break;
4548                         }
4549                 }
4550         }
4551         /* Need to add a new block to chain */
4552         if (!set) {
4553                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4554                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4555                 if (twait_block == NULL) {
4556 #ifdef INVARIANTS
4557                         panic("Can not alloc tagblock");
4558 #endif
4559                         return;
4560                 }
4561                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4562                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4563                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4564                 twait_block->vtag_block[0].v_tag = tag;
4565                 twait_block->vtag_block[0].lport = lport;
4566                 twait_block->vtag_block[0].rport = rport;
4567         }
4568 }
4569
4570
4571
4572 /*-
4573  * Free the association after un-hashing the remote port. This
4574  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4575  * expect that the input to this function IS a locked TCB.
4576  * It will return 0, if it did NOT destroy the association (instead
4577  * it unlocks it. It will return NON-zero if it either destroyed the
4578  * association OR the association is already destroyed.
4579  */
4580 int
4581 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4582 {
4583         int i;
4584         struct sctp_association *asoc;
4585         struct sctp_nets *net, *nnet;
4586         struct sctp_laddr *laddr, *naddr;
4587         struct sctp_tmit_chunk *chk, *nchk;
4588         struct sctp_asconf_addr *aparam, *naparam;
4589         struct sctp_asconf_ack *aack, *naack;
4590         struct sctp_stream_reset_list *strrst, *nstrrst;
4591         struct sctp_queued_to_read *sq, *nsq;
4592         struct sctp_stream_queue_pending *sp, *nsp;
4593         sctp_sharedkey_t *shared_key, *nshared_key;
4594         struct socket *so;
4595
4596         /* first, lets purge the entry from the hash table. */
4597
4598 #ifdef SCTP_LOG_CLOSING
4599         sctp_log_closing(inp, stcb, 6);
4600 #endif
4601         if (stcb->asoc.state == 0) {
4602 #ifdef SCTP_LOG_CLOSING
4603                 sctp_log_closing(inp, NULL, 7);
4604 #endif
4605                 /* there is no asoc, really TSNH :-0 */
4606                 return (1);
4607         }
4608         if (stcb->asoc.alternate) {
4609                 sctp_free_remote_addr(stcb->asoc.alternate);
4610                 stcb->asoc.alternate = NULL;
4611         }
4612         /* TEMP CODE */
4613         if (stcb->freed_from_where == 0) {
4614                 /* Only record the first place free happened from */
4615                 stcb->freed_from_where = from_location;
4616         }
4617         /* TEMP CODE */
4618
4619         asoc = &stcb->asoc;
4620         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4621             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4622                 /* nothing around */
4623                 so = NULL;
4624         else
4625                 so = inp->sctp_socket;
4626
4627         /*
4628          * We used timer based freeing if a reader or writer is in the way.
4629          * So we first check if we are actually being called from a timer,
4630          * if so we abort early if a reader or writer is still in the way.
4631          */
4632         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4633             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4634                 /*
4635                  * is it the timer driving us? if so are the reader/writers
4636                  * gone?
4637                  */
4638                 if (stcb->asoc.refcnt) {
4639                         /* nope, reader or writer in the way */
4640                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4641                         /* no asoc destroyed */
4642                         SCTP_TCB_UNLOCK(stcb);
4643 #ifdef SCTP_LOG_CLOSING
4644                         sctp_log_closing(inp, stcb, 8);
4645 #endif
4646                         return (0);
4647                 }
4648         }
4649         /* now clean up any other timers */
4650         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4651         asoc->dack_timer.self = NULL;
4652         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4653         /*-
4654          * For stream reset we don't blast this unless
4655          * it is a str-reset timer, it might be the
4656          * free-asoc timer which we DON'T want to
4657          * disturb.
4658          */
4659         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4660                 asoc->strreset_timer.self = NULL;
4661         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4662         asoc->asconf_timer.self = NULL;
4663         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4664         asoc->autoclose_timer.self = NULL;
4665         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4666         asoc->shut_guard_timer.self = NULL;
4667         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4668         asoc->delayed_event_timer.self = NULL;
4669         /* Mobility adaptation */
4670         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4671         asoc->delete_prim_timer.self = NULL;
4672         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4673                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4674                 net->rxt_timer.self = NULL;
4675                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4676                 net->pmtu_timer.self = NULL;
4677                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4678                 net->hb_timer.self = NULL;
4679         }
4680         /* Now the read queue needs to be cleaned up (only once) */
4681         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4682                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4683                 SCTP_INP_READ_LOCK(inp);
4684                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4685                         if (sq->stcb == stcb) {
4686                                 sq->do_not_ref_stcb = 1;
4687                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4688                                 /*
4689                                  * If there is no end, there never will be
4690                                  * now.
4691                                  */
4692                                 if (sq->end_added == 0) {
4693                                         /* Held for PD-API clear that. */
4694                                         sq->pdapi_aborted = 1;
4695                                         sq->held_length = 0;
4696                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4697                                                 /*
4698                                                  * Need to add a PD-API
4699                                                  * aborted indication.
4700                                                  * Setting the control_pdapi
4701                                                  * assures that it will be
4702                                                  * added right after this
4703                                                  * msg.
4704                                                  */
4705                                                 uint32_t strseq;
4706
4707                                                 stcb->asoc.control_pdapi = sq;
4708                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4709                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4710                                                     stcb,
4711                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4712                                                     (void *)&strseq,
4713                                                     SCTP_SO_LOCKED);
4714                                                 stcb->asoc.control_pdapi = NULL;
4715                                         }
4716                                 }
4717                                 /* Add an end to wake them */
4718                                 sq->end_added = 1;
4719                         }
4720                 }
4721                 SCTP_INP_READ_UNLOCK(inp);
4722                 if (stcb->block_entry) {
4723                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4724                         stcb->block_entry->error = ECONNRESET;
4725                         stcb->block_entry = NULL;
4726                 }
4727         }
4728         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4729                 /*
4730                  * Someone holds a reference OR the socket is unaccepted
4731                  * yet.
4732                  */
4733                 if ((stcb->asoc.refcnt) ||
4734                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4735                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4736                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4737                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4738                 }
4739                 SCTP_TCB_UNLOCK(stcb);
4740                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4741                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4742                         /* nothing around */
4743                         so = NULL;
4744                 if (so) {
4745                         /* Wake any reader/writers */
4746                         sctp_sorwakeup(inp, so);
4747                         sctp_sowwakeup(inp, so);
4748                 }
4749 #ifdef SCTP_LOG_CLOSING
4750                 sctp_log_closing(inp, stcb, 9);
4751 #endif
4752                 /* no asoc destroyed */
4753                 return (0);
4754         }
4755 #ifdef SCTP_LOG_CLOSING
4756         sctp_log_closing(inp, stcb, 10);
4757 #endif
4758         /*
4759          * When I reach here, no others want to kill the assoc yet.. and I
4760          * own the lock. Now its possible an abort comes in when I do the
4761          * lock exchange below to grab all the locks to do the final take
4762          * out. to prevent this we increment the count, which will start a
4763          * timer and blow out above thus assuring us that we hold exclusive
4764          * killing of the asoc. Note that after getting back the TCB lock we
4765          * will go ahead and increment the counter back up and stop any
4766          * timer a passing stranger may have started :-S
4767          */
4768         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4769                 atomic_add_int(&stcb->asoc.refcnt, 1);
4770
4771                 SCTP_TCB_UNLOCK(stcb);
4772                 SCTP_INP_INFO_WLOCK();
4773                 SCTP_INP_WLOCK(inp);
4774                 SCTP_TCB_LOCK(stcb);
4775         }
4776         /* Double check the GONE flag */
4777         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4778             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4779                 /* nothing around */
4780                 so = NULL;
4781
4782         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4783             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4784                 /*
4785                  * For TCP type we need special handling when we are
4786                  * connected. We also include the peel'ed off ones to.
4787                  */
4788                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4789                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4790                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4791                         if (so) {
4792                                 SOCK_LOCK(so);
4793                                 if (so->so_rcv.sb_cc == 0) {
4794                                         so->so_state &= ~(SS_ISCONNECTING |
4795                                             SS_ISDISCONNECTING |
4796                                             SS_ISCONFIRMING |
4797                                             SS_ISCONNECTED);
4798                                 }
4799                                 socantrcvmore_locked(so);
4800                                 sctp_sowwakeup(inp, so);
4801                                 sctp_sorwakeup(inp, so);
4802                                 SCTP_SOWAKEUP(so);
4803                         }
4804                 }
4805         }
4806         /*
4807          * Make it invalid too, that way if its about to run it will abort
4808          * and return.
4809          */
4810         /* re-increment the lock */
4811         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4812                 atomic_add_int(&stcb->asoc.refcnt, -1);
4813         }
4814         if (stcb->asoc.refcnt) {
4815                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4816                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4817                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4818                         SCTP_INP_INFO_WUNLOCK();
4819                         SCTP_INP_WUNLOCK(inp);
4820                 }
4821                 SCTP_TCB_UNLOCK(stcb);
4822                 return (0);
4823         }
4824         asoc->state = 0;
4825         if (inp->sctp_tcbhash) {
4826                 LIST_REMOVE(stcb, sctp_tcbhash);
4827         }
4828         if (stcb->asoc.in_asocid_hash) {
4829                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4830         }
4831         /* Now lets remove it from the list of ALL associations in the EP */
4832         LIST_REMOVE(stcb, sctp_tcblist);
4833         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4834                 SCTP_INP_INCR_REF(inp);
4835                 SCTP_INP_WUNLOCK(inp);
4836         }
4837         /* pull from vtag hash */
4838         LIST_REMOVE(stcb, sctp_asocs);
4839         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4840             inp->sctp_lport, stcb->rport);
4841
4842         /*
4843          * Now restop the timers to be sure this is paranoia at is finest!
4844          */
4845         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4846         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4847         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4848         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4849         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4850         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4851         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4852         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4853                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4854                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4855                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4856         }
4857
4858         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4859         /*
4860          * The chunk lists and such SHOULD be empty but we check them just
4861          * in case.
4862          */
4863         /* anything on the wheel needs to be removed */
4864         for (i = 0; i < asoc->streamoutcnt; i++) {
4865                 struct sctp_stream_out *outs;
4866
4867                 outs = &asoc->strmout[i];
4868                 /* now clean up any chunks here */
4869                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4870                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4871                         if (sp->data) {
4872                                 if (so) {
4873                                         /* Still an open socket - report */
4874                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4875                                             0, (void *)sp, SCTP_SO_LOCKED);
4876                                 }
4877                                 if (sp->data) {
4878                                         sctp_m_freem(sp->data);
4879                                         sp->data = NULL;
4880                                         sp->tail_mbuf = NULL;
4881                                 }
4882                         }
4883                         if (sp->net) {
4884                                 sctp_free_remote_addr(sp->net);
4885                                 sp->net = NULL;
4886                         }
4887                         sctp_free_spbufspace(stcb, asoc, sp);
4888                         if (sp->holds_key_ref)
4889                                 sctp_auth_key_release(stcb, sp->auth_keyid, SCTP_SO_LOCKED);
4890                         /* Free the zone stuff  */
4891                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp);
4892                         SCTP_DECR_STRMOQ_COUNT();
4893                         /* sa_ignore FREED_MEMORY */
4894                 }
4895         }
4896         /* sa_ignore FREED_MEMORY */
4897         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4898                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4899                 SCTP_FREE(strrst, SCTP_M_STRESET);
4900         }
4901         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4902                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4903                 if (sq->data) {
4904                         sctp_m_freem(sq->data);
4905                         sq->data = NULL;
4906                 }
4907                 sctp_free_remote_addr(sq->whoFrom);
4908                 sq->whoFrom = NULL;
4909                 sq->stcb = NULL;
4910                 /* Free the ctl entry */
4911                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4912                 SCTP_DECR_READQ_COUNT();
4913                 /* sa_ignore FREED_MEMORY */
4914         }
4915         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4916                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4917                 if (chk->data) {
4918                         sctp_m_freem(chk->data);
4919                         chk->data = NULL;
4920                 }
4921                 if (chk->holds_key_ref)
4922                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4923                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4924                 SCTP_DECR_CHK_COUNT();
4925                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4926                 asoc->free_chunk_cnt--;
4927                 /* sa_ignore FREED_MEMORY */
4928         }
4929         /* pending send queue SHOULD be empty */
4930         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4931                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4932                 if (chk->data) {
4933                         if (so) {
4934                                 /* Still a socket? */
4935                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
4936                                     0, chk, SCTP_SO_LOCKED);
4937                         }
4938                         if (chk->data) {
4939                                 sctp_m_freem(chk->data);
4940                                 chk->data = NULL;
4941                         }
4942                 }
4943                 if (chk->holds_key_ref)
4944                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4945                 if (chk->whoTo) {
4946                         sctp_free_remote_addr(chk->whoTo);
4947                         chk->whoTo = NULL;
4948                 }
4949                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4950                 SCTP_DECR_CHK_COUNT();
4951                 /* sa_ignore FREED_MEMORY */
4952         }
4953         /* sent queue SHOULD be empty */
4954         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
4955                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4956                 if (chk->data) {
4957                         if (so) {
4958                                 /* Still a socket? */
4959                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
4960                                     0, chk, SCTP_SO_LOCKED);
4961                         }
4962                         if (chk->data) {
4963                                 sctp_m_freem(chk->data);
4964                                 chk->data = NULL;
4965                         }
4966                 }
4967                 if (chk->holds_key_ref)
4968                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4969                 sctp_free_remote_addr(chk->whoTo);
4970                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4971                 SCTP_DECR_CHK_COUNT();
4972                 /* sa_ignore FREED_MEMORY */
4973         }
4974         /* control queue MAY not be empty */
4975         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
4976                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4977                 if (chk->data) {
4978                         sctp_m_freem(chk->data);
4979                         chk->data = NULL;
4980                 }
4981                 if (chk->holds_key_ref)
4982                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4983                 sctp_free_remote_addr(chk->whoTo);
4984                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4985                 SCTP_DECR_CHK_COUNT();
4986                 /* sa_ignore FREED_MEMORY */
4987         }
4988         /* ASCONF queue MAY not be empty */
4989         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
4990                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
4991                 if (chk->data) {
4992                         sctp_m_freem(chk->data);
4993                         chk->data = NULL;
4994                 }
4995                 if (chk->holds_key_ref)
4996                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4997                 sctp_free_remote_addr(chk->whoTo);
4998                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4999                 SCTP_DECR_CHK_COUNT();
5000                 /* sa_ignore FREED_MEMORY */
5001         }
5002         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5003                 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5004                 if (chk->data) {
5005                         sctp_m_freem(chk->data);
5006                         chk->data = NULL;
5007                 }
5008                 if (chk->holds_key_ref)
5009                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5010                 sctp_free_remote_addr(chk->whoTo);
5011                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5012                 SCTP_DECR_CHK_COUNT();
5013                 /* sa_ignore FREED_MEMORY */
5014         }
5015
5016         if (asoc->mapping_array) {
5017                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5018                 asoc->mapping_array = NULL;
5019         }
5020         if (asoc->nr_mapping_array) {
5021                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5022                 asoc->nr_mapping_array = NULL;
5023         }
5024         /* the stream outs */
5025         if (asoc->strmout) {
5026                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5027                 asoc->strmout = NULL;
5028         }
5029         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5030         if (asoc->strmin) {
5031                 struct sctp_queued_to_read *ctl, *nctl;
5032
5033                 for (i = 0; i < asoc->streamincnt; i++) {
5034                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5035                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5036                                 sctp_free_remote_addr(ctl->whoFrom);
5037                                 if (ctl->data) {
5038                                         sctp_m_freem(ctl->data);
5039                                         ctl->data = NULL;
5040                                 }
5041                                 /*
5042                                  * We don't free the address here since all
5043                                  * the net's were freed above.
5044                                  */
5045                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5046                                 SCTP_DECR_READQ_COUNT();
5047                         }
5048                 }
5049                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5050                 asoc->strmin = NULL;
5051         }
5052         asoc->streamincnt = 0;
5053         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5054 #ifdef INVARIANTS
5055                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5056                         panic("no net's left alloc'ed, or list points to itself");
5057                 }
5058 #endif
5059                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5060                 sctp_free_remote_addr(net);
5061         }
5062         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5063                 /* sa_ignore FREED_MEMORY */
5064                 sctp_remove_laddr(laddr);
5065         }
5066
5067         /* pending asconf (address) parameters */
5068         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5069                 /* sa_ignore FREED_MEMORY */
5070                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5071                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5072         }
5073         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5074                 /* sa_ignore FREED_MEMORY */
5075                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5076                 if (aack->data != NULL) {
5077                         sctp_m_freem(aack->data);
5078                 }
5079                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5080         }
5081         /* clean up auth stuff */
5082         if (asoc->local_hmacs)
5083                 sctp_free_hmaclist(asoc->local_hmacs);
5084         if (asoc->peer_hmacs)
5085                 sctp_free_hmaclist(asoc->peer_hmacs);
5086
5087         if (asoc->local_auth_chunks)
5088                 sctp_free_chunklist(asoc->local_auth_chunks);
5089         if (asoc->peer_auth_chunks)
5090                 sctp_free_chunklist(asoc->peer_auth_chunks);
5091
5092         sctp_free_authinfo(&asoc->authinfo);
5093
5094         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5095                 LIST_REMOVE(shared_key, next);
5096                 sctp_free_sharedkey(shared_key);
5097                 /* sa_ignore FREED_MEMORY */
5098         }
5099
5100         /* Insert new items here :> */
5101
5102         /* Get rid of LOCK */
5103         SCTP_TCB_LOCK_DESTROY(stcb);
5104         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5105         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5106                 SCTP_INP_INFO_WUNLOCK();
5107                 SCTP_INP_RLOCK(inp);
5108         }
5109 #ifdef SCTP_TRACK_FREED_ASOCS
5110         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5111                 /* now clean up the tasoc itself */
5112                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5113                 SCTP_DECR_ASOC_COUNT();
5114         } else {
5115                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5116         }
5117 #else
5118         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5119         SCTP_DECR_ASOC_COUNT();
5120 #endif
5121         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5122                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5123                         /*
5124                          * If its NOT the inp_free calling us AND sctp_close
5125                          * as been called, we call back...
5126                          */
5127                         SCTP_INP_RUNLOCK(inp);
5128                         /*
5129                          * This will start the kill timer (if we are the
5130                          * last one) since we hold an increment yet. But
5131                          * this is the only safe way to do this since
5132                          * otherwise if the socket closes at the same time
5133                          * we are here we might collide in the cleanup.
5134                          */
5135                         sctp_inpcb_free(inp,
5136                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5137                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5138                         SCTP_INP_DECR_REF(inp);
5139                         goto out_of;
5140                 } else {
5141                         /* The socket is still open. */
5142                         SCTP_INP_DECR_REF(inp);
5143                 }
5144         }
5145         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5146                 SCTP_INP_RUNLOCK(inp);
5147         }
5148 out_of:
5149         /* destroyed the asoc */
5150 #ifdef SCTP_LOG_CLOSING
5151         sctp_log_closing(inp, NULL, 11);
5152 #endif
5153         return (1);
5154 }
5155
5156
5157
5158 /*
5159  * determine if a destination is "reachable" based upon the addresses bound
5160  * to the current endpoint (e.g. only v4 or v6 currently bound)
5161  */
5162 /*
5163  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5164  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5165  * types bound as its endpoint
5166  */
5167 int
5168 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5169 {
5170         struct sctp_inpcb *inp;
5171         int answer;
5172
5173         /*
5174          * No locks here, the TCB, in all cases is already locked and an
5175          * assoc is up. There is either a INP lock by the caller applied (in
5176          * asconf case when deleting an address) or NOT in the HB case,
5177          * however if HB then the INP increment is up and the INP will not
5178          * be removed (on top of the fact that we have a TCB lock). So we
5179          * only want to read the sctp_flags, which is either bound-all or
5180          * not.. no protection needed since once an assoc is up you can't be
5181          * changing your binding.
5182          */
5183         inp = stcb->sctp_ep;
5184         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5185                 /* if bound all, destination is not restricted */
5186                 /*
5187                  * RRS: Question during lock work: Is this correct? If you
5188                  * are bound-all you still might need to obey the V4--V6
5189                  * flags??? IMO this bound-all stuff needs to be removed!
5190                  */
5191                 return (1);
5192         }
5193         /* NOTE: all "scope" checks are done when local addresses are added */
5194         switch (destaddr->sa_family) {
5195         case AF_INET6:
5196                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5197                 break;
5198         case AF_INET:
5199                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5200                 break;
5201         default:
5202                 /* invalid family, so it's unreachable */
5203                 answer = 0;
5204                 break;
5205         }
5206         return (answer);
5207 }
5208
5209 /*
5210  * update the inp_vflags on an endpoint
5211  */
5212 static void
5213 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5214 {
5215         struct sctp_laddr *laddr;
5216
5217         /* first clear the flag */
5218         inp->ip_inp.inp.inp_vflag = 0;
5219         /* set the flag based on addresses on the ep list */
5220         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5221                 if (laddr->ifa == NULL) {
5222                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5223                             __FUNCTION__);
5224                         continue;
5225                 }
5226                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5227                         continue;
5228                 }
5229                 switch (laddr->ifa->address.sa.sa_family) {
5230 #ifdef INET6
5231                 case AF_INET6:
5232                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5233                         break;
5234 #endif
5235 #ifdef INET
5236                 case AF_INET:
5237                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5238                         break;
5239 #endif
5240                 default:
5241                         break;
5242                 }
5243         }
5244 }
5245
5246 /*
5247  * Add the address to the endpoint local address list There is nothing to be
5248  * done if we are bound to all addresses
5249  */
5250 void
5251 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5252 {
5253         struct sctp_laddr *laddr;
5254         int fnd, error = 0;
5255
5256         fnd = 0;
5257
5258         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5259                 /* You are already bound to all. You have it already */
5260                 return;
5261         }
5262 #ifdef INET6
5263         if (ifa->address.sa.sa_family == AF_INET6) {
5264                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5265                         /* Can't bind a non-useable addr. */
5266                         return;
5267                 }
5268         }
5269 #endif
5270         /* first, is it already present? */
5271         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5272                 if (laddr->ifa == ifa) {
5273                         fnd = 1;
5274                         break;
5275                 }
5276         }
5277
5278         if (fnd == 0) {
5279                 /* Not in the ep list */
5280                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5281                 if (error != 0)
5282                         return;
5283                 inp->laddr_count++;
5284                 /* update inp_vflag flags */
5285                 switch (ifa->address.sa.sa_family) {
5286 #ifdef INET6
5287                 case AF_INET6:
5288                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5289                         break;
5290 #endif
5291 #ifdef INET6
5292                 case AF_INET:
5293                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5294                         break;
5295 #endif
5296                 default:
5297                         break;
5298                 }
5299         }
5300         return;
5301 }
5302
5303
5304 /*
5305  * select a new (hopefully reachable) destination net (should only be used
5306  * when we deleted an ep addr that is the only usable source address to reach
5307  * the destination net)
5308  */
5309 static void
5310 sctp_select_primary_destination(struct sctp_tcb *stcb)
5311 {
5312         struct sctp_nets *net;
5313
5314         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5315                 /* for now, we'll just pick the first reachable one we find */
5316                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5317                         continue;
5318                 if (sctp_destination_is_reachable(stcb,
5319                     (struct sockaddr *)&net->ro._l_addr)) {
5320                         /* found a reachable destination */
5321                         stcb->asoc.primary_destination = net;
5322                 }
5323         }
5324         /* I can't there from here! ...we're gonna die shortly... */
5325 }
5326
5327
5328 /*
5329  * Delete the address from the endpoint local address list There is nothing
5330  * to be done if we are bound to all addresses
5331  */
5332 void
5333 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5334 {
5335         struct sctp_laddr *laddr;
5336         int fnd;
5337
5338         fnd = 0;
5339         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5340                 /* You are already bound to all. You have it already */
5341                 return;
5342         }
5343         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5344                 if (laddr->ifa == ifa) {
5345                         fnd = 1;
5346                         break;
5347                 }
5348         }
5349         if (fnd && (inp->laddr_count < 2)) {
5350                 /* can't delete unless there are at LEAST 2 addresses */
5351                 return;
5352         }
5353         if (fnd) {
5354                 /*
5355                  * clean up any use of this address go through our
5356                  * associations and clear any last_used_address that match
5357                  * this one for each assoc, see if a new primary_destination
5358                  * is needed
5359                  */
5360                 struct sctp_tcb *stcb;
5361
5362                 /* clean up "next_addr_touse" */
5363                 if (inp->next_addr_touse == laddr)
5364                         /* delete this address */
5365                         inp->next_addr_touse = NULL;
5366
5367                 /* clean up "last_used_address" */
5368                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5369                         struct sctp_nets *net;
5370
5371                         SCTP_TCB_LOCK(stcb);
5372                         if (stcb->asoc.last_used_address == laddr)
5373                                 /* delete this address */
5374                                 stcb->asoc.last_used_address = NULL;
5375                         /*
5376                          * Now spin through all the nets and purge any ref
5377                          * to laddr
5378                          */
5379                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5380                                 if (net->ro._s_addr &&
5381                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5382                                         /* Yep, purge src address selected */
5383                                         sctp_rtentry_t *rt;
5384
5385                                         /* delete this address if cached */
5386                                         rt = net->ro.ro_rt;
5387                                         if (rt != NULL) {
5388                                                 RTFREE(rt);
5389                                                 net->ro.ro_rt = NULL;
5390                                         }
5391                                         sctp_free_ifa(net->ro._s_addr);
5392                                         net->ro._s_addr = NULL;
5393                                         net->src_addr_selected = 0;
5394                                 }
5395                         }
5396                         SCTP_TCB_UNLOCK(stcb);
5397                 }               /* for each tcb */
5398                 /* remove it from the ep list */
5399                 sctp_remove_laddr(laddr);
5400                 inp->laddr_count--;
5401                 /* update inp_vflag flags */
5402                 sctp_update_ep_vflag(inp);
5403         }
5404         return;
5405 }
5406
5407 /*
5408  * Add the address to the TCB local address restricted list.
5409  * This is a "pending" address list (eg. addresses waiting for an
5410  * ASCONF-ACK response) and cannot be used as a valid source address.
5411  */
5412 void
5413 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5414 {
5415         struct sctp_laddr *laddr;
5416         struct sctpladdr *list;
5417
5418         /*
5419          * Assumes TCB is locked.. and possibly the INP. May need to
5420          * confirm/fix that if we need it and is not the case.
5421          */
5422         list = &stcb->asoc.sctp_restricted_addrs;
5423
5424 #ifdef INET6
5425         if (ifa->address.sa.sa_family == AF_INET6) {
5426                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5427                         /* Can't bind a non-existent addr. */
5428                         return;
5429                 }
5430         }
5431 #endif
5432         /* does the address already exist? */
5433         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5434                 if (laddr->ifa == ifa) {
5435                         return;
5436                 }
5437         }
5438
5439         /* add to the list */
5440         (void)sctp_insert_laddr(list, ifa, 0);
5441         return;
5442 }
5443
5444 /*
5445  * insert an laddr entry with the given ifa for the desired list
5446  */
5447 int
5448 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5449 {
5450         struct sctp_laddr *laddr;
5451
5452         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5453         if (laddr == NULL) {
5454                 /* out of memory? */
5455                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5456                 return (EINVAL);
5457         }
5458         SCTP_INCR_LADDR_COUNT();
5459         bzero(laddr, sizeof(*laddr));
5460         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5461         laddr->ifa = ifa;
5462         laddr->action = act;
5463         atomic_add_int(&ifa->refcount, 1);
5464         /* insert it */
5465         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5466
5467         return (0);
5468 }
5469
5470 /*
5471  * Remove an laddr entry from the local address list (on an assoc)
5472  */
5473 void
5474 sctp_remove_laddr(struct sctp_laddr *laddr)
5475 {
5476
5477         /* remove from the list */
5478         LIST_REMOVE(laddr, sctp_nxt_addr);
5479         sctp_free_ifa(laddr->ifa);
5480         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5481         SCTP_DECR_LADDR_COUNT();
5482 }
5483
5484 /*
5485  * Remove a local address from the TCB local address restricted list
5486  */
5487 void
5488 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5489 {
5490         struct sctp_inpcb *inp;
5491         struct sctp_laddr *laddr;
5492
5493         /*
5494          * This is called by asconf work. It is assumed that a) The TCB is
5495          * locked and b) The INP is locked. This is true in as much as I can
5496          * trace through the entry asconf code where I did these locks.
5497          * Again, the ASCONF code is a bit different in that it does lock
5498          * the INP during its work often times. This must be since we don't
5499          * want other proc's looking up things while what they are looking
5500          * up is changing :-D
5501          */
5502
5503         inp = stcb->sctp_ep;
5504         /* if subset bound and don't allow ASCONF's, can't delete last */
5505         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5506             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5507                 if (stcb->sctp_ep->laddr_count < 2) {
5508                         /* can't delete last address */
5509                         return;
5510                 }
5511         }
5512         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5513                 /* remove the address if it exists */
5514                 if (laddr->ifa == NULL)
5515                         continue;
5516                 if (laddr->ifa == ifa) {
5517                         sctp_remove_laddr(laddr);
5518                         return;
5519                 }
5520         }
5521
5522         /* address not found! */
5523         return;
5524 }
5525
5526 /*
5527  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5528  */
5529 /* sysctl */
5530 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5531 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5532
5533
5534
5535 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5536 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5537 int *sctp_cpuarry = NULL;
5538 void
5539 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5540 {
5541         /* Queue a packet to a processor for the specified core */
5542         struct sctp_mcore_queue *qent;
5543         struct sctp_mcore_ctrl *wkq;
5544         int need_wake = 0;
5545
5546         if (sctp_mcore_workers == NULL) {
5547                 /* Something went way bad during setup */
5548                 sctp_input_with_port(m, off, 0);
5549                 return;
5550         }
5551         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5552             (sizeof(struct sctp_mcore_queue)),
5553             SCTP_M_MCORE);
5554         if (qent == NULL) {
5555                 /* This is trouble  */
5556                 sctp_input_with_port(m, off, 0);
5557                 return;
5558         }
5559         qent->vn = curvnet;
5560         qent->m = m;
5561         qent->off = off;
5562         qent->v6 = 0;
5563         wkq = &sctp_mcore_workers[cpu_to_use];
5564         SCTP_MCORE_QLOCK(wkq);
5565
5566         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5567         if (wkq->running == 0) {
5568                 need_wake = 1;
5569         }
5570         SCTP_MCORE_QUNLOCK(wkq);
5571         if (need_wake) {
5572                 wakeup(&wkq->running);
5573         }
5574 }
5575
5576 static void
5577 sctp_mcore_thread(void *arg)
5578 {
5579
5580         struct sctp_mcore_ctrl *wkq;
5581         struct sctp_mcore_queue *qent;
5582
5583         wkq = (struct sctp_mcore_ctrl *)arg;
5584         struct mbuf *m;
5585         int off, v6;
5586
5587         /* Wait for first tickle */
5588         SCTP_MCORE_LOCK(wkq);
5589         wkq->running = 0;
5590         msleep(&wkq->running,
5591             &wkq->core_mtx,
5592             0, "wait for pkt", 0);
5593         SCTP_MCORE_UNLOCK(wkq);
5594
5595         /* Bind to our cpu */
5596         thread_lock(curthread);
5597         sched_bind(curthread, wkq->cpuid);
5598         thread_unlock(curthread);
5599
5600         /* Now lets start working */
5601         SCTP_MCORE_LOCK(wkq);
5602         /* Now grab lock and go */
5603         for (;;) {
5604                 SCTP_MCORE_QLOCK(wkq);
5605 skip_sleep:
5606                 wkq->running = 1;
5607                 qent = TAILQ_FIRST(&wkq->que);
5608                 if (qent) {
5609                         TAILQ_REMOVE(&wkq->que, qent, next);
5610                         SCTP_MCORE_QUNLOCK(wkq);
5611                         CURVNET_SET(qent->vn);
5612                         m = qent->m;
5613                         off = qent->off;
5614                         v6 = qent->v6;
5615                         SCTP_FREE(qent, SCTP_M_MCORE);
5616                         if (v6 == 0) {
5617                                 sctp_input_with_port(m, off, 0);
5618                         } else {
5619                                 SCTP_PRINTF("V6 not yet supported\n");
5620                                 sctp_m_freem(m);
5621                         }
5622                         CURVNET_RESTORE();
5623                         SCTP_MCORE_QLOCK(wkq);
5624                 }
5625                 wkq->running = 0;
5626                 if (!TAILQ_EMPTY(&wkq->que)) {
5627                         goto skip_sleep;
5628                 }
5629                 SCTP_MCORE_QUNLOCK(wkq);
5630                 msleep(&wkq->running,
5631                     &wkq->core_mtx,
5632                     0, "wait for pkt", 0);
5633         }
5634 }
5635
5636 static void
5637 sctp_startup_mcore_threads(void)
5638 {
5639         int i, cpu;
5640
5641         if (mp_ncpus == 1)
5642                 return;
5643
5644         if (sctp_mcore_workers != NULL) {
5645                 /*
5646                  * Already been here in some previous vnet?
5647                  */
5648                 return;
5649         }
5650         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5651             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5652             SCTP_M_MCORE);
5653         if (sctp_mcore_workers == NULL) {
5654                 /* TSNH I hope */
5655                 return;
5656         }
5657         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5658             sizeof(struct sctp_mcore_ctrl)));
5659         /* Init the structures */
5660         for (i = 0; i <= mp_maxid; i++) {
5661                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5662                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5663                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5664                 sctp_mcore_workers[i].cpuid = i;
5665         }
5666         if (sctp_cpuarry == NULL) {
5667                 SCTP_MALLOC(sctp_cpuarry, int *,
5668                     (mp_ncpus * sizeof(int)),
5669                     SCTP_M_MCORE);
5670                 i = 0;
5671                 CPU_FOREACH(cpu) {
5672                         sctp_cpuarry[i] = cpu;
5673                         i++;
5674                 }
5675         }
5676         /* Now start them all */
5677         CPU_FOREACH(cpu) {
5678                 (void)kproc_create(sctp_mcore_thread,
5679                     (void *)&sctp_mcore_workers[cpu],
5680                     &sctp_mcore_workers[cpu].thread_proc,
5681                     RFPROC,
5682                     SCTP_KTHREAD_PAGES,
5683                     SCTP_MCORE_NAME);
5684
5685         }
5686 }
5687
5688 #endif
5689
5690 void
5691 sctp_pcb_init()
5692 {
5693         /*
5694          * SCTP initialization for the PCB structures should be called by
5695          * the sctp_init() funciton.
5696          */
5697         int i;
5698         struct timeval tv;
5699
5700         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5701                 /* error I was called twice */
5702                 return;
5703         }
5704         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5705
5706 #if defined(SCTP_LOCAL_TRACE_BUF)
5707         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5708 #endif
5709 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5710         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5711             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5712             SCTP_M_MCORE);
5713 #endif
5714         (void)SCTP_GETTIME_TIMEVAL(&tv);
5715 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5716         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5717         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5718         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5719 #else
5720         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5721         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5722         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5723 #endif
5724         /* init the empty list of (All) Endpoints */
5725         LIST_INIT(&SCTP_BASE_INFO(listhead));
5726
5727
5728         /* init the hash table of endpoints */
5729         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5730         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5731         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5732         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5733             &SCTP_BASE_INFO(hashasocmark));
5734         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5735             &SCTP_BASE_INFO(hashmark));
5736         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5737             &SCTP_BASE_INFO(hashtcpmark));
5738         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5739
5740
5741         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5742             &SCTP_BASE_INFO(hashvrfmark));
5743
5744         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5745             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5746         /* init the zones */
5747         /*
5748          * FIX ME: Should check for NULL returns, but if it does fail we are
5749          * doomed to panic anyways... add later maybe.
5750          */
5751         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5752             sizeof(struct sctp_inpcb), maxsockets);
5753
5754         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5755             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5756
5757         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5758             sizeof(struct sctp_laddr),
5759             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5760
5761         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5762             sizeof(struct sctp_nets),
5763             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5764
5765         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5766             sizeof(struct sctp_tmit_chunk),
5767             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5768
5769         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5770             sizeof(struct sctp_queued_to_read),
5771             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5772
5773         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5774             sizeof(struct sctp_stream_queue_pending),
5775             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5776
5777         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5778             sizeof(struct sctp_asconf),
5779             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5780
5781         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5782             sizeof(struct sctp_asconf_ack),
5783             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5784
5785
5786         /* Master Lock INIT for info structure */
5787         SCTP_INP_INFO_LOCK_INIT();
5788         SCTP_STATLOG_INIT_LOCK();
5789
5790         SCTP_IPI_COUNT_INIT();
5791         SCTP_IPI_ADDR_INIT();
5792 #ifdef SCTP_PACKET_LOGGING
5793         SCTP_IP_PKTLOG_INIT();
5794 #endif
5795         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5796
5797         SCTP_WQ_ADDR_INIT();
5798         /* not sure if we need all the counts */
5799         SCTP_BASE_INFO(ipi_count_ep) = 0;
5800         /* assoc/tcb zone info */
5801         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5802         /* local addrlist zone info */
5803         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5804         /* remote addrlist zone info */
5805         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5806         /* chunk info */
5807         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5808
5809         /* socket queue zone info */
5810         SCTP_BASE_INFO(ipi_count_readq) = 0;
5811
5812         /* stream out queue cont */
5813         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5814
5815         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5816         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5817
5818         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5819
5820         /* Init the TIMEWAIT list */
5821         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5822                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5823         }
5824
5825         sctp_startup_iterator();
5826
5827 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5828         sctp_startup_mcore_threads();
5829 #endif
5830
5831         /*
5832          * INIT the default VRF which for BSD is the only one, other O/S's
5833          * may have more. But initially they must start with one and then
5834          * add the VRF's as addresses are added.
5835          */
5836         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5837 }
5838
5839 /*
5840  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5841  */
5842 void
5843 sctp_pcb_finish(void)
5844 {
5845         struct sctp_vrflist *vrf_bucket;
5846         struct sctp_vrf *vrf, *nvrf;
5847         struct sctp_ifn *ifn, *nifn;
5848         struct sctp_ifa *ifa, *nifa;
5849         struct sctpvtaghead *chain;
5850         struct sctp_tagblock *twait_block, *prev_twait_block;
5851         struct sctp_laddr *wi, *nwi;
5852         int i;
5853
5854         /*
5855          * Free BSD the it thread never exits but we do clean up. The only
5856          * way freebsd reaches here if we have VRF's but we still add the
5857          * ifdef to make it compile on old versions.
5858          */
5859         {
5860                 struct sctp_iterator *it, *nit;
5861
5862                 SCTP_IPI_ITERATOR_WQ_LOCK();
5863                 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5864                         if (it->vn != curvnet) {
5865                                 continue;
5866                         }
5867                         TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5868                         if (it->function_atend != NULL) {
5869                                 (*it->function_atend) (it->pointer, it->val);
5870                         }
5871                         SCTP_FREE(it, SCTP_M_ITER);
5872                 }
5873                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5874                 SCTP_ITERATOR_LOCK();
5875                 if ((sctp_it_ctl.cur_it) &&
5876                     (sctp_it_ctl.cur_it->vn == curvnet)) {
5877                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5878                 }
5879                 SCTP_ITERATOR_UNLOCK();
5880         }
5881
5882         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5883         SCTP_WQ_ADDR_LOCK();
5884         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5885                 LIST_REMOVE(wi, sctp_nxt_addr);
5886                 SCTP_DECR_LADDR_COUNT();
5887                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5888         }
5889         SCTP_WQ_ADDR_UNLOCK();
5890
5891         /*
5892          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5893          * destroyed first).
5894          */
5895         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5896         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5897                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5898                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5899                                 /* free the ifa */
5900                                 LIST_REMOVE(ifa, next_bucket);
5901                                 LIST_REMOVE(ifa, next_ifa);
5902                                 SCTP_FREE(ifa, SCTP_M_IFA);
5903                         }
5904                         /* free the ifn */
5905                         LIST_REMOVE(ifn, next_bucket);
5906                         LIST_REMOVE(ifn, next_ifn);
5907                         SCTP_FREE(ifn, SCTP_M_IFN);
5908                 }
5909                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5910                 /* free the vrf */
5911                 LIST_REMOVE(vrf, next_vrf);
5912                 SCTP_FREE(vrf, SCTP_M_VRF);
5913         }
5914         /* free the vrf hashes */
5915         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5916         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5917
5918         /*
5919          * free the TIMEWAIT list elements malloc'd in the function
5920          * sctp_add_vtag_to_timewait()...
5921          */
5922         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5923                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5924                 if (!LIST_EMPTY(chain)) {
5925                         prev_twait_block = NULL;
5926                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5927                                 if (prev_twait_block) {
5928                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5929                                 }
5930                                 prev_twait_block = twait_block;
5931                         }
5932                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5933                 }
5934         }
5935
5936         /* free the locks and mutexes */
5937 #ifdef SCTP_PACKET_LOGGING
5938         SCTP_IP_PKTLOG_DESTROY();
5939 #endif
5940         SCTP_IPI_ADDR_DESTROY();
5941         SCTP_STATLOG_DESTROY();
5942         SCTP_INP_INFO_LOCK_DESTROY();
5943
5944         SCTP_WQ_ADDR_DESTROY();
5945
5946         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5947         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5948         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5949         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5950         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5951         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5952         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5953         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5954         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5955         /* Get rid of other stuff to */
5956         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5957                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5958         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5959                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5960         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5961                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5962 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5963         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
5964 #endif
5965 }
5966
5967
5968 int
5969 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5970     int offset, int limit,
5971     struct sockaddr *src, struct sockaddr *dst,
5972     struct sockaddr *altsa)
5973 {
5974         /*
5975          * grub through the INIT pulling addresses and loading them to the
5976          * nets structure in the asoc. The from address in the mbuf should
5977          * also be loaded (if it is not already). This routine can be called
5978          * with either INIT or INIT-ACK's as long as the m points to the IP
5979          * packet and the offset points to the beginning of the parameters.
5980          */
5981         struct sctp_inpcb *inp;
5982         struct sctp_nets *net, *nnet, *net_tmp;
5983         struct sctp_paramhdr *phdr, parm_buf;
5984         struct sctp_tcb *stcb_tmp;
5985         uint16_t ptype, plen;
5986         struct sockaddr *sa;
5987         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
5988         struct sctp_auth_random *p_random = NULL;
5989         uint16_t random_len = 0;
5990         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
5991         struct sctp_auth_hmac_algo *hmacs = NULL;
5992         uint16_t hmacs_len = 0;
5993         uint8_t saw_asconf = 0;
5994         uint8_t saw_asconf_ack = 0;
5995         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
5996         struct sctp_auth_chunk_list *chunks = NULL;
5997         uint16_t num_chunks = 0;
5998         sctp_key_t *new_key;
5999         uint32_t keylen;
6000         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6001         uint8_t ecn_allowed;
6002
6003 #ifdef INET
6004         struct sockaddr_in sin;
6005
6006 #endif
6007 #ifdef INET6
6008         struct sockaddr_in6 sin6;
6009
6010 #endif
6011
6012         /* First get the destination address setup too. */
6013 #ifdef INET
6014         memset(&sin, 0, sizeof(sin));
6015         sin.sin_family = AF_INET;
6016         sin.sin_len = sizeof(sin);
6017         sin.sin_port = stcb->rport;
6018 #endif
6019 #ifdef INET6
6020         memset(&sin6, 0, sizeof(sin6));
6021         sin6.sin6_family = AF_INET6;
6022         sin6.sin6_len = sizeof(struct sockaddr_in6);
6023         sin6.sin6_port = stcb->rport;
6024 #endif
6025         if (altsa) {
6026                 sa = altsa;
6027         } else {
6028                 sa = src;
6029         }
6030         /* Turn off ECN until we get through all params */
6031         ecn_allowed = 0;
6032         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6033                 /* mark all addresses that we have currently on the list */
6034                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6035         }
6036         /* does the source address already exist? if so skip it */
6037         inp = stcb->sctp_ep;
6038         atomic_add_int(&stcb->asoc.refcnt, 1);
6039         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6040         atomic_add_int(&stcb->asoc.refcnt, -1);
6041
6042         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6043                 /* we must add the source address */
6044                 /* no scope set here since we have a tcb already. */
6045                 switch (sa->sa_family) {
6046 #ifdef INET
6047                 case AF_INET:
6048                         if (stcb->asoc.ipv4_addr_legal) {
6049                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6050                                         return (-1);
6051                                 }
6052                         }
6053                         break;
6054 #endif
6055 #ifdef INET6
6056                 case AF_INET6:
6057                         if (stcb->asoc.ipv6_addr_legal) {
6058                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6059                                         return (-2);
6060                                 }
6061                         }
6062                         break;
6063 #endif
6064                 default:
6065                         break;
6066                 }
6067         } else {
6068                 if (net_tmp != NULL && stcb_tmp == stcb) {
6069                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6070                 } else if (stcb_tmp != stcb) {
6071                         /* It belongs to another association? */
6072                         if (stcb_tmp)
6073                                 SCTP_TCB_UNLOCK(stcb_tmp);
6074                         return (-3);
6075                 }
6076         }
6077         if (stcb->asoc.state == 0) {
6078                 /* the assoc was freed? */
6079                 return (-4);
6080         }
6081         /*
6082          * peer must explicitly turn this on. This may have been initialized
6083          * to be "on" in order to allow local addr changes while INIT's are
6084          * in flight.
6085          */
6086         stcb->asoc.peer_supports_asconf = 0;
6087         /* now we must go through each of the params. */
6088         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6089         while (phdr) {
6090                 ptype = ntohs(phdr->param_type);
6091                 plen = ntohs(phdr->param_length);
6092                 /*
6093                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6094                  * (uint32_t)ptype, (int)plen);
6095                  */
6096                 if (offset + plen > limit) {
6097                         break;
6098                 }
6099                 if (plen == 0) {
6100                         break;
6101                 }
6102 #ifdef INET
6103                 if (ptype == SCTP_IPV4_ADDRESS) {
6104                         if (stcb->asoc.ipv4_addr_legal) {
6105                                 struct sctp_ipv4addr_param *p4, p4_buf;
6106
6107                                 /* ok get the v4 address and check/add */
6108                                 phdr = sctp_get_next_param(m, offset,
6109                                     (struct sctp_paramhdr *)&p4_buf,
6110                                     sizeof(p4_buf));
6111                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6112                                     phdr == NULL) {
6113                                         return (-5);
6114                                 }
6115                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6116                                 sin.sin_addr.s_addr = p4->addr;
6117                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6118                                         /* Skip multi-cast addresses */
6119                                         goto next_param;
6120                                 }
6121                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6122                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6123                                         goto next_param;
6124                                 }
6125                                 sa = (struct sockaddr *)&sin;
6126                                 inp = stcb->sctp_ep;
6127                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6128                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6129                                     dst, stcb);
6130                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6131
6132                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6133                                     inp == NULL) {
6134                                         /* we must add the source address */
6135                                         /*
6136                                          * no scope set since we have a tcb
6137                                          * already
6138                                          */
6139
6140                                         /*
6141                                          * we must validate the state again
6142                                          * here
6143                                          */
6144                         add_it_now:
6145                                         if (stcb->asoc.state == 0) {
6146                                                 /* the assoc was freed? */
6147                                                 return (-7);
6148                                         }
6149                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6150                                                 return (-8);
6151                                         }
6152                                 } else if (stcb_tmp == stcb) {
6153                                         if (stcb->asoc.state == 0) {
6154                                                 /* the assoc was freed? */
6155                                                 return (-10);
6156                                         }
6157                                         if (net != NULL) {
6158                                                 /* clear flag */
6159                                                 net->dest_state &=
6160                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6161                                         }
6162                                 } else {
6163                                         /*
6164                                          * strange, address is in another
6165                                          * assoc? straighten out locks.
6166                                          */
6167                                         if (stcb_tmp) {
6168                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6169                                                         /*
6170                                                          * in setup state we
6171                                                          * abort this guy
6172                                                          */
6173                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6174                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6175                                                         goto add_it_now;
6176                                                 }
6177                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6178                                         }
6179                                         if (stcb->asoc.state == 0) {
6180                                                 /* the assoc was freed? */
6181                                                 return (-12);
6182                                         }
6183                                         return (-13);
6184                                 }
6185                         }
6186                 } else
6187 #endif
6188 #ifdef INET6
6189                 if (ptype == SCTP_IPV6_ADDRESS) {
6190                         if (stcb->asoc.ipv6_addr_legal) {
6191                                 /* ok get the v6 address and check/add */
6192                                 struct sctp_ipv6addr_param *p6, p6_buf;
6193
6194                                 phdr = sctp_get_next_param(m, offset,
6195                                     (struct sctp_paramhdr *)&p6_buf,
6196                                     sizeof(p6_buf));
6197                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6198                                     phdr == NULL) {
6199                                         return (-14);
6200                                 }
6201                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6202                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6203                                     sizeof(p6->addr));
6204                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6205                                         /* Skip multi-cast addresses */
6206                                         goto next_param;
6207                                 }
6208                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6209                                         /*
6210                                          * Link local make no sense without
6211                                          * scope
6212                                          */
6213                                         goto next_param;
6214                                 }
6215                                 sa = (struct sockaddr *)&sin6;
6216                                 inp = stcb->sctp_ep;
6217                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6218                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6219                                     dst, stcb);
6220                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6221                                 if (stcb_tmp == NULL &&
6222                                     (inp == stcb->sctp_ep || inp == NULL)) {
6223                                         /*
6224                                          * we must validate the state again
6225                                          * here
6226                                          */
6227                         add_it_now6:
6228                                         if (stcb->asoc.state == 0) {
6229                                                 /* the assoc was freed? */
6230                                                 return (-16);
6231                                         }
6232                                         /*
6233                                          * we must add the address, no scope
6234                                          * set
6235                                          */
6236                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6237                                                 return (-17);
6238                                         }
6239                                 } else if (stcb_tmp == stcb) {
6240                                         /*
6241                                          * we must validate the state again
6242                                          * here
6243                                          */
6244                                         if (stcb->asoc.state == 0) {
6245                                                 /* the assoc was freed? */
6246                                                 return (-19);
6247                                         }
6248                                         if (net != NULL) {
6249                                                 /* clear flag */
6250                                                 net->dest_state &=
6251                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6252                                         }
6253                                 } else {
6254                                         /*
6255                                          * strange, address is in another
6256                                          * assoc? straighten out locks.
6257                                          */
6258                                         if (stcb_tmp)
6259                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6260                                                         /*
6261                                                          * in setup state we
6262                                                          * abort this guy
6263                                                          */
6264                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6265                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6266                                                         goto add_it_now6;
6267                                                 }
6268                                         SCTP_TCB_UNLOCK(stcb_tmp);
6269
6270                                         if (stcb->asoc.state == 0) {
6271                                                 /* the assoc was freed? */
6272                                                 return (-21);
6273                                         }
6274                                         return (-22);
6275                                 }
6276                         }
6277                 } else
6278 #endif
6279                 if (ptype == SCTP_ECN_CAPABLE) {
6280                         ecn_allowed = 1;
6281                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6282                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6283                                 struct sctp_adaptation_layer_indication ai,
6284                                                                 *aip;
6285
6286                                 phdr = sctp_get_next_param(m, offset,
6287                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6288                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6289                                 if (aip) {
6290                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6291                                         stcb->asoc.adaptation_needed = 1;
6292                                 }
6293                         }
6294                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6295                         struct sctp_asconf_addr_param lstore, *fee;
6296                         int lptype;
6297                         struct sockaddr *lsa = NULL;
6298
6299 #ifdef INET
6300                         struct sctp_asconf_addrv4_param *fii;
6301
6302 #endif
6303
6304                         stcb->asoc.peer_supports_asconf = 1;
6305                         if (plen > sizeof(lstore)) {
6306                                 return (-23);
6307                         }
6308                         phdr = sctp_get_next_param(m, offset,
6309                             (struct sctp_paramhdr *)&lstore,
6310                             min(plen, sizeof(lstore)));
6311                         if (phdr == NULL) {
6312                                 return (-24);
6313                         }
6314                         fee = (struct sctp_asconf_addr_param *)phdr;
6315                         lptype = ntohs(fee->addrp.ph.param_type);
6316                         switch (lptype) {
6317 #ifdef INET
6318                         case SCTP_IPV4_ADDRESS:
6319                                 if (plen !=
6320                                     sizeof(struct sctp_asconf_addrv4_param)) {
6321                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6322                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6323                                             plen);
6324                                 } else {
6325                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6326                                         sin.sin_addr.s_addr = fii->addrp.addr;
6327                                         lsa = (struct sockaddr *)&sin;
6328                                 }
6329                                 break;
6330 #endif
6331 #ifdef INET6
6332                         case SCTP_IPV6_ADDRESS:
6333                                 if (plen !=
6334                                     sizeof(struct sctp_asconf_addr_param)) {
6335                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6336                                             (int)sizeof(struct sctp_asconf_addr_param),
6337                                             plen);
6338                                 } else {
6339                                         memcpy(sin6.sin6_addr.s6_addr,
6340                                             fee->addrp.addr,
6341                                             sizeof(fee->addrp.addr));
6342                                         lsa = (struct sockaddr *)&sin6;
6343                                 }
6344                                 break;
6345 #endif
6346                         default:
6347                                 break;
6348                         }
6349                         if (lsa) {
6350                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6351                         }
6352                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6353                         stcb->asoc.peer_supports_nat = 1;
6354                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6355                         /* Peer supports pr-sctp */
6356                         stcb->asoc.peer_supports_prsctp = 1;
6357                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6358                         /* A supported extension chunk */
6359                         struct sctp_supported_chunk_types_param *pr_supported;
6360                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6361                         int num_ent, i;
6362
6363                         phdr = sctp_get_next_param(m, offset,
6364                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6365                         if (phdr == NULL) {
6366                                 return (-25);
6367                         }
6368                         stcb->asoc.peer_supports_asconf = 0;
6369                         stcb->asoc.peer_supports_prsctp = 0;
6370                         stcb->asoc.peer_supports_pktdrop = 0;
6371                         stcb->asoc.peer_supports_strreset = 0;
6372                         stcb->asoc.peer_supports_nr_sack = 0;
6373                         stcb->asoc.peer_supports_auth = 0;
6374                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6375                         num_ent = plen - sizeof(struct sctp_paramhdr);
6376                         for (i = 0; i < num_ent; i++) {
6377                                 switch (pr_supported->chunk_types[i]) {
6378                                 case SCTP_ASCONF:
6379                                 case SCTP_ASCONF_ACK:
6380                                         stcb->asoc.peer_supports_asconf = 1;
6381                                         break;
6382                                 case SCTP_FORWARD_CUM_TSN:
6383                                         stcb->asoc.peer_supports_prsctp = 1;
6384                                         break;
6385                                 case SCTP_PACKET_DROPPED:
6386                                         stcb->asoc.peer_supports_pktdrop = 1;
6387                                         break;
6388                                 case SCTP_NR_SELECTIVE_ACK:
6389                                         stcb->asoc.peer_supports_nr_sack = 1;
6390                                         break;
6391                                 case SCTP_STREAM_RESET:
6392                                         stcb->asoc.peer_supports_strreset = 1;
6393                                         break;
6394                                 case SCTP_AUTHENTICATION:
6395                                         stcb->asoc.peer_supports_auth = 1;
6396                                         break;
6397                                 default:
6398                                         /* one I have not learned yet */
6399                                         break;
6400
6401                                 }
6402                         }
6403                 } else if (ptype == SCTP_RANDOM) {
6404                         if (plen > sizeof(random_store))
6405                                 break;
6406                         if (got_random) {
6407                                 /* already processed a RANDOM */
6408                                 goto next_param;
6409                         }
6410                         phdr = sctp_get_next_param(m, offset,
6411                             (struct sctp_paramhdr *)random_store,
6412                             min(sizeof(random_store), plen));
6413                         if (phdr == NULL)
6414                                 return (-26);
6415                         p_random = (struct sctp_auth_random *)phdr;
6416                         random_len = plen - sizeof(*p_random);
6417                         /* enforce the random length */
6418                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6419                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6420                                 return (-27);
6421                         }
6422                         got_random = 1;
6423                 } else if (ptype == SCTP_HMAC_LIST) {
6424                         int num_hmacs;
6425                         int i;
6426
6427                         if (plen > sizeof(hmacs_store))
6428                                 break;
6429                         if (got_hmacs) {
6430                                 /* already processed a HMAC list */
6431                                 goto next_param;
6432                         }
6433                         phdr = sctp_get_next_param(m, offset,
6434                             (struct sctp_paramhdr *)hmacs_store,
6435                             min(plen, sizeof(hmacs_store)));
6436                         if (phdr == NULL)
6437                                 return (-28);
6438                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6439                         hmacs_len = plen - sizeof(*hmacs);
6440                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6441                         /* validate the hmac list */
6442                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6443                                 return (-29);
6444                         }
6445                         if (stcb->asoc.peer_hmacs != NULL)
6446                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6447                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6448                         if (stcb->asoc.peer_hmacs != NULL) {
6449                                 for (i = 0; i < num_hmacs; i++) {
6450                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6451                                             ntohs(hmacs->hmac_ids[i]));
6452                                 }
6453                         }
6454                         got_hmacs = 1;
6455                 } else if (ptype == SCTP_CHUNK_LIST) {
6456                         int i;
6457
6458                         if (plen > sizeof(chunks_store))
6459                                 break;
6460                         if (got_chklist) {
6461                                 /* already processed a Chunks list */
6462                                 goto next_param;
6463                         }
6464                         phdr = sctp_get_next_param(m, offset,
6465                             (struct sctp_paramhdr *)chunks_store,
6466                             min(plen, sizeof(chunks_store)));
6467                         if (phdr == NULL)
6468                                 return (-30);
6469                         chunks = (struct sctp_auth_chunk_list *)phdr;
6470                         num_chunks = plen - sizeof(*chunks);
6471                         if (stcb->asoc.peer_auth_chunks != NULL)
6472                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6473                         else
6474                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6475                         for (i = 0; i < num_chunks; i++) {
6476                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6477                                     stcb->asoc.peer_auth_chunks);
6478                                 /* record asconf/asconf-ack if listed */
6479                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6480                                         saw_asconf = 1;
6481                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6482                                         saw_asconf_ack = 1;
6483
6484                         }
6485                         got_chklist = 1;
6486                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6487                             (ptype == SCTP_STATE_COOKIE) ||
6488                             (ptype == SCTP_UNRECOG_PARAM) ||
6489                             (ptype == SCTP_COOKIE_PRESERVE) ||
6490                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6491                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6492                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6493                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6494                     (ptype == SCTP_SUCCESS_REPORT)) {
6495                          /* don't care */ ;
6496                 } else {
6497                         if ((ptype & 0x8000) == 0x0000) {
6498                                 /*
6499                                  * must stop processing the rest of the
6500                                  * param's. Any report bits were handled
6501                                  * with the call to
6502                                  * sctp_arethere_unrecognized_parameters()
6503                                  * when the INIT or INIT-ACK was first seen.
6504                                  */
6505                                 break;
6506                         }
6507                 }
6508
6509 next_param:
6510                 offset += SCTP_SIZE32(plen);
6511                 if (offset >= limit) {
6512                         break;
6513                 }
6514                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6515                     sizeof(parm_buf));
6516         }
6517         /* Now check to see if we need to purge any addresses */
6518         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6519                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6520                     SCTP_ADDR_NOT_IN_ASSOC) {
6521                         /* This address has been removed from the asoc */
6522                         /* remove and free it */
6523                         stcb->asoc.numnets--;
6524                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6525                         sctp_free_remote_addr(net);
6526                         if (net == stcb->asoc.primary_destination) {
6527                                 stcb->asoc.primary_destination = NULL;
6528                                 sctp_select_primary_destination(stcb);
6529                         }
6530                 }
6531         }
6532         if (ecn_allowed == 0) {
6533                 stcb->asoc.ecn_allowed = 0;
6534         }
6535         /* validate authentication required parameters */
6536         if (got_random && got_hmacs) {
6537                 stcb->asoc.peer_supports_auth = 1;
6538         } else {
6539                 stcb->asoc.peer_supports_auth = 0;
6540         }
6541         if (!stcb->asoc.peer_supports_auth && got_chklist) {
6542                 /* peer does not support auth but sent a chunks list? */
6543                 return (-31);
6544         }
6545         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6546             !stcb->asoc.peer_supports_auth) {
6547                 /* peer supports asconf but not auth? */
6548                 return (-32);
6549         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6550             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6551                 return (-33);
6552         }
6553         /* concatenate the full random key */
6554         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6555         if (chunks != NULL) {
6556                 keylen += sizeof(*chunks) + num_chunks;
6557         }
6558         new_key = sctp_alloc_key(keylen);
6559         if (new_key != NULL) {
6560                 /* copy in the RANDOM */
6561                 if (p_random != NULL) {
6562                         keylen = sizeof(*p_random) + random_len;
6563                         bcopy(p_random, new_key->key, keylen);
6564                 }
6565                 /* append in the AUTH chunks */
6566                 if (chunks != NULL) {
6567                         bcopy(chunks, new_key->key + keylen,
6568                             sizeof(*chunks) + num_chunks);
6569                         keylen += sizeof(*chunks) + num_chunks;
6570                 }
6571                 /* append in the HMACs */
6572                 if (hmacs != NULL) {
6573                         bcopy(hmacs, new_key->key + keylen,
6574                             sizeof(*hmacs) + hmacs_len);
6575                 }
6576         } else {
6577                 /* failed to get memory for the key */
6578                 return (-34);
6579         }
6580         if (stcb->asoc.authinfo.peer_random != NULL)
6581                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6582         stcb->asoc.authinfo.peer_random = new_key;
6583         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6584         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6585
6586         return (0);
6587 }
6588
6589 int
6590 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6591     struct sctp_nets *net)
6592 {
6593         /* make sure the requested primary address exists in the assoc */
6594         if (net == NULL && sa)
6595                 net = sctp_findnet(stcb, sa);
6596
6597         if (net == NULL) {
6598                 /* didn't find the requested primary address! */
6599                 return (-1);
6600         } else {
6601                 /* set the primary address */
6602                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6603                         /* Must be confirmed, so queue to set */
6604                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6605                         return (0);
6606                 }
6607                 stcb->asoc.primary_destination = net;
6608                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6609                         sctp_free_remote_addr(stcb->asoc.alternate);
6610                         stcb->asoc.alternate = NULL;
6611                 }
6612                 net = TAILQ_FIRST(&stcb->asoc.nets);
6613                 if (net != stcb->asoc.primary_destination) {
6614                         /*
6615                          * first one on the list is NOT the primary
6616                          * sctp_cmpaddr() is much more efficient if the
6617                          * primary is the first on the list, make it so.
6618                          */
6619                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6620                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6621                 }
6622                 return (0);
6623         }
6624 }
6625
6626 int
6627 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6628 {
6629         /*
6630          * This function serves two purposes. It will see if a TAG can be
6631          * re-used and return 1 for yes it is ok and 0 for don't use that
6632          * tag. A secondary function it will do is purge out old tags that
6633          * can be removed.
6634          */
6635         struct sctpvtaghead *chain;
6636         struct sctp_tagblock *twait_block;
6637         struct sctpasochead *head;
6638         struct sctp_tcb *stcb;
6639         int i;
6640
6641         SCTP_INP_INFO_RLOCK();
6642         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6643             SCTP_BASE_INFO(hashasocmark))];
6644         if (head == NULL) {
6645                 /* invalid vtag */
6646                 goto skip_vtag_check;
6647         }
6648         LIST_FOREACH(stcb, head, sctp_asocs) {
6649                 /*
6650                  * We choose not to lock anything here. TCB's can't be
6651                  * removed since we have the read lock, so they can't be
6652                  * freed on us, same thing for the INP. I may be wrong with
6653                  * this assumption, but we will go with it for now :-)
6654                  */
6655                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6656                         continue;
6657                 }
6658                 if (stcb->asoc.my_vtag == tag) {
6659                         /* candidate */
6660                         if (stcb->rport != rport) {
6661                                 continue;
6662                         }
6663                         if (stcb->sctp_ep->sctp_lport != lport) {
6664                                 continue;
6665                         }
6666                         /* Its a used tag set */
6667                         SCTP_INP_INFO_RUNLOCK();
6668                         return (0);
6669                 }
6670         }
6671 skip_vtag_check:
6672
6673         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6674         /* Now what about timed wait ? */
6675         if (!LIST_EMPTY(chain)) {
6676                 /*
6677                  * Block(s) are present, lets see if we have this tag in the
6678                  * list
6679                  */
6680                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6681                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6682                                 if (twait_block->vtag_block[i].v_tag == 0) {
6683                                         /* not used */
6684                                         continue;
6685                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6686                                     now->tv_sec) {
6687                                         /* Audit expires this guy */
6688                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
6689                                         twait_block->vtag_block[i].v_tag = 0;
6690                                         twait_block->vtag_block[i].lport = 0;
6691                                         twait_block->vtag_block[i].rport = 0;
6692                                 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6693                                             (twait_block->vtag_block[i].lport == lport) &&
6694                                     (twait_block->vtag_block[i].rport == rport)) {
6695                                         /* Bad tag, sorry :< */
6696                                         SCTP_INP_INFO_RUNLOCK();
6697                                         return (0);
6698                                 }
6699                         }
6700                 }
6701         }
6702         SCTP_INP_INFO_RUNLOCK();
6703         return (1);
6704 }
6705
6706 static void
6707 sctp_drain_mbufs(struct sctp_tcb *stcb)
6708 {
6709         /*
6710          * We must hunt this association for MBUF's past the cumack (i.e.
6711          * out of order data that we can renege on).
6712          */
6713         struct sctp_association *asoc;
6714         struct sctp_tmit_chunk *chk, *nchk;
6715         uint32_t cumulative_tsn_p1;
6716         struct sctp_queued_to_read *ctl, *nctl;
6717         int cnt, strmat;
6718         uint32_t gap, i;
6719         int fnd = 0;
6720
6721         /* We look for anything larger than the cum-ack + 1 */
6722
6723         asoc = &stcb->asoc;
6724         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6725                 /* none we can reneg on. */
6726                 return;
6727         }
6728         SCTP_STAT_INCR(sctps_protocol_drains_done);
6729         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6730         cnt = 0;
6731         /* First look in the re-assembly queue */
6732         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6733                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6734                         /* Yep it is above cum-ack */
6735                         cnt++;
6736                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6737                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6738                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6739                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6740                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6741                         if (chk->data) {
6742                                 sctp_m_freem(chk->data);
6743                                 chk->data = NULL;
6744                         }
6745                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6746                 }
6747         }
6748         /* Ok that was fun, now we will drain all the inbound streams? */
6749         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6750                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6751                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6752                                 /* Yep it is above cum-ack */
6753                                 cnt++;
6754                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6755                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6756                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6757                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6758                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6759                                 if (ctl->data) {
6760                                         sctp_m_freem(ctl->data);
6761                                         ctl->data = NULL;
6762                                 }
6763                                 sctp_free_remote_addr(ctl->whoFrom);
6764                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6765                                 SCTP_DECR_READQ_COUNT();
6766                         }
6767                 }
6768         }
6769         if (cnt) {
6770                 /* We must back down to see what the new highest is */
6771                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6772                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6773                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6774                                 asoc->highest_tsn_inside_map = i;
6775                                 fnd = 1;
6776                                 break;
6777                         }
6778                 }
6779                 if (!fnd) {
6780                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6781                 }
6782                 /*
6783                  * Question, should we go through the delivery queue? The
6784                  * only reason things are on here is the app not reading OR
6785                  * a p-d-api up. An attacker COULD send enough in to
6786                  * initiate the PD-API and then send a bunch of stuff to
6787                  * other streams... these would wind up on the delivery
6788                  * queue.. and then we would not get to them. But in order
6789                  * to do this I then have to back-track and un-deliver
6790                  * sequence numbers in streams.. el-yucko. I think for now
6791                  * we will NOT look at the delivery queue and leave it to be
6792                  * something to consider later. An alternative would be to
6793                  * abort the P-D-API with a notification and then deliver
6794                  * the data.... Or another method might be to keep track of
6795                  * how many times the situation occurs and if we see a
6796                  * possible attack underway just abort the association.
6797                  */
6798 #ifdef SCTP_DEBUG
6799                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6800 #endif
6801                 /*
6802                  * Now do we need to find a new
6803                  * asoc->highest_tsn_inside_map?
6804                  */
6805                 asoc->last_revoke_count = cnt;
6806                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6807                 /* sa_ignore NO_NULL_CHK */
6808                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6809                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6810         }
6811         /*
6812          * Another issue, in un-setting the TSN's in the mapping array we
6813          * DID NOT adjust the highest_tsn marker.  This will cause one of
6814          * two things to occur. It may cause us to do extra work in checking
6815          * for our mapping array movement. More importantly it may cause us
6816          * to SACK every datagram. This may not be a bad thing though since
6817          * we will recover once we get our cum-ack above and all this stuff
6818          * we dumped recovered.
6819          */
6820 }
6821
6822 void
6823 sctp_drain()
6824 {
6825         /*
6826          * We must walk the PCB lists for ALL associations here. The system
6827          * is LOW on MBUF's and needs help. This is where reneging will
6828          * occur. We really hope this does NOT happen!
6829          */
6830         VNET_ITERATOR_DECL(vnet_iter);
6831         VNET_LIST_RLOCK_NOSLEEP();
6832         VNET_FOREACH(vnet_iter) {
6833                 CURVNET_SET(vnet_iter);
6834                 struct sctp_inpcb *inp;
6835                 struct sctp_tcb *stcb;
6836
6837                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6838                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6839 #ifdef VIMAGE
6840                         continue;
6841 #else
6842                         return;
6843 #endif
6844                 }
6845                 SCTP_INP_INFO_RLOCK();
6846                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6847                         /* For each endpoint */
6848                         SCTP_INP_RLOCK(inp);
6849                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6850                                 /* For each association */
6851                                 SCTP_TCB_LOCK(stcb);
6852                                 sctp_drain_mbufs(stcb);
6853                                 SCTP_TCB_UNLOCK(stcb);
6854                         }
6855                         SCTP_INP_RUNLOCK(inp);
6856                 }
6857                 SCTP_INP_INFO_RUNLOCK();
6858                 CURVNET_RESTORE();
6859         }
6860         VNET_LIST_RUNLOCK_NOSLEEP();
6861 }
6862
6863 /*
6864  * start a new iterator
6865  * iterates through all endpoints and associations based on the pcb_state
6866  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6867  * assocs and "ef" (optional) is executed when the iterator completes.
6868  * "inpf" (optional) is executed for each new endpoint as it is being
6869  * iterated through. inpe (optional) is called when the inp completes
6870  * its way through all the stcbs.
6871  */
6872 int
6873 sctp_initiate_iterator(inp_func inpf,
6874     asoc_func af,
6875     inp_func inpe,
6876     uint32_t pcb_state,
6877     uint32_t pcb_features,
6878     uint32_t asoc_state,
6879     void *argp,
6880     uint32_t argi,
6881     end_func ef,
6882     struct sctp_inpcb *s_inp,
6883     uint8_t chunk_output_off)
6884 {
6885         struct sctp_iterator *it = NULL;
6886
6887         if (af == NULL) {
6888                 return (-1);
6889         }
6890         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6891             SCTP_M_ITER);
6892         if (it == NULL) {
6893                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6894                 return (ENOMEM);
6895         }
6896         memset(it, 0, sizeof(*it));
6897         it->function_assoc = af;
6898         it->function_inp = inpf;
6899         if (inpf)
6900                 it->done_current_ep = 0;
6901         else
6902                 it->done_current_ep = 1;
6903         it->function_atend = ef;
6904         it->pointer = argp;
6905         it->val = argi;
6906         it->pcb_flags = pcb_state;
6907         it->pcb_features = pcb_features;
6908         it->asoc_state = asoc_state;
6909         it->function_inp_end = inpe;
6910         it->no_chunk_output = chunk_output_off;
6911         it->vn = curvnet;
6912         if (s_inp) {
6913                 /* Assume lock is held here */
6914                 it->inp = s_inp;
6915                 SCTP_INP_INCR_REF(it->inp);
6916                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
6917         } else {
6918                 SCTP_INP_INFO_RLOCK();
6919                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
6920                 if (it->inp) {
6921                         SCTP_INP_INCR_REF(it->inp);
6922                 }
6923                 SCTP_INP_INFO_RUNLOCK();
6924                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
6925
6926         }
6927         SCTP_IPI_ITERATOR_WQ_LOCK();
6928
6929         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
6930         if (sctp_it_ctl.iterator_running == 0) {
6931                 sctp_wakeup_iterator();
6932         }
6933         SCTP_IPI_ITERATOR_WQ_UNLOCK();
6934         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
6935         return (0);
6936 }