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         if (remote->sa_family == AF_INET) {
1207                 rport = (((struct sockaddr_in *)remote)->sin_port);
1208         } else if (remote->sa_family == AF_INET6) {
1209                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1210         } else {
1211                 return (NULL);
1212         }
1213         if (locked_tcb) {
1214                 /*
1215                  * UN-lock so we can do proper locking here this occurs when
1216                  * called from load_addresses_from_init.
1217                  */
1218                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1219                 SCTP_TCB_UNLOCK(locked_tcb);
1220         }
1221         SCTP_INP_INFO_RLOCK();
1222         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
1223                 /*-
1224                  * Now either this guy is our listener or it's the
1225                  * connector. If it is the one that issued the connect, then
1226                  * it's only chance is to be the first TCB in the list. If
1227                  * it is the acceptor, then do the special_lookup to hash
1228                  * and find the real inp.
1229                  */
1230                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1231                         /* to is peer addr, from is my addr */
1232                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1233                             netp, inp->def_vrf_id);
1234                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1235                                 /* we have a locked tcb, lower refcount */
1236                                 SCTP_INP_DECR_REF(inp);
1237                         }
1238                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1239                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1240                                 SCTP_TCB_LOCK(locked_tcb);
1241                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1242                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1243                         }
1244                         SCTP_INP_INFO_RUNLOCK();
1245                         return (stcb);
1246                 } else {
1247                         SCTP_INP_WLOCK(inp);
1248                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1249                                 goto null_return;
1250                         }
1251                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1252                         if (stcb == NULL) {
1253                                 goto null_return;
1254                         }
1255                         SCTP_TCB_LOCK(stcb);
1256
1257                         if (stcb->rport != rport) {
1258                                 /* remote port does not match. */
1259                                 SCTP_TCB_UNLOCK(stcb);
1260                                 goto null_return;
1261                         }
1262                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1263                                 SCTP_TCB_UNLOCK(stcb);
1264                                 goto null_return;
1265                         }
1266                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1267                                 SCTP_TCB_UNLOCK(stcb);
1268                                 goto null_return;
1269                         }
1270                         /* now look at the list of remote addresses */
1271                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1272 #ifdef INVARIANTS
1273                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1274                                         panic("Corrupt net list");
1275                                 }
1276 #endif
1277                                 if (net->ro._l_addr.sa.sa_family !=
1278                                     remote->sa_family) {
1279                                         /* not the same family */
1280                                         continue;
1281                                 }
1282                                 switch (remote->sa_family) {
1283 #ifdef INET
1284                                 case AF_INET:
1285                                         {
1286                                                 struct sockaddr_in *sin,
1287                                                            *rsin;
1288
1289                                                 sin = (struct sockaddr_in *)
1290                                                     &net->ro._l_addr;
1291                                                 rsin = (struct sockaddr_in *)remote;
1292                                                 if (sin->sin_addr.s_addr ==
1293                                                     rsin->sin_addr.s_addr) {
1294                                                         /* found it */
1295                                                         if (netp != NULL) {
1296                                                                 *netp = net;
1297                                                         }
1298                                                         if (locked_tcb == NULL) {
1299                                                                 SCTP_INP_DECR_REF(inp);
1300                                                         } else if (locked_tcb != stcb) {
1301                                                                 SCTP_TCB_LOCK(locked_tcb);
1302                                                         }
1303                                                         if (locked_tcb) {
1304                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1305                                                         }
1306                                                         SCTP_INP_WUNLOCK(inp);
1307                                                         SCTP_INP_INFO_RUNLOCK();
1308                                                         return (stcb);
1309                                                 }
1310                                                 break;
1311                                         }
1312 #endif
1313 #ifdef INET6
1314                                 case AF_INET6:
1315                                         {
1316                                                 struct sockaddr_in6 *sin6,
1317                                                             *rsin6;
1318
1319                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1320                                                 rsin6 = (struct sockaddr_in6 *)remote;
1321                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1322                                                     rsin6)) {
1323                                                         /* found it */
1324                                                         if (netp != NULL) {
1325                                                                 *netp = net;
1326                                                         }
1327                                                         if (locked_tcb == NULL) {
1328                                                                 SCTP_INP_DECR_REF(inp);
1329                                                         } else if (locked_tcb != stcb) {
1330                                                                 SCTP_TCB_LOCK(locked_tcb);
1331                                                         }
1332                                                         if (locked_tcb) {
1333                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1334                                                         }
1335                                                         SCTP_INP_WUNLOCK(inp);
1336                                                         SCTP_INP_INFO_RUNLOCK();
1337                                                         return (stcb);
1338                                                 }
1339                                                 break;
1340                                         }
1341 #endif
1342                                 default:
1343                                         /* TSNH */
1344                                         break;
1345                                 }
1346                         }
1347                         SCTP_TCB_UNLOCK(stcb);
1348                 }
1349         } else {
1350                 SCTP_INP_WLOCK(inp);
1351                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1352                         goto null_return;
1353                 }
1354                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1355                     inp->sctp_hashmark)];
1356                 if (head == NULL) {
1357                         goto null_return;
1358                 }
1359                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1360                         if (stcb->rport != rport) {
1361                                 /* remote port does not match */
1362                                 continue;
1363                         }
1364                         SCTP_TCB_LOCK(stcb);
1365                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1366                                 SCTP_TCB_UNLOCK(stcb);
1367                                 continue;
1368                         }
1369                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1370                                 SCTP_TCB_UNLOCK(stcb);
1371                                 continue;
1372                         }
1373                         /* now look at the list of remote addresses */
1374                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1375 #ifdef INVARIANTS
1376                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1377                                         panic("Corrupt net list");
1378                                 }
1379 #endif
1380                                 if (net->ro._l_addr.sa.sa_family !=
1381                                     remote->sa_family) {
1382                                         /* not the same family */
1383                                         continue;
1384                                 }
1385                                 switch (remote->sa_family) {
1386 #ifdef INET
1387                                 case AF_INET:
1388                                         {
1389                                                 struct sockaddr_in *sin,
1390                                                            *rsin;
1391
1392                                                 sin = (struct sockaddr_in *)
1393                                                     &net->ro._l_addr;
1394                                                 rsin = (struct sockaddr_in *)remote;
1395                                                 if (sin->sin_addr.s_addr ==
1396                                                     rsin->sin_addr.s_addr) {
1397                                                         /* found it */
1398                                                         if (netp != NULL) {
1399                                                                 *netp = net;
1400                                                         }
1401                                                         if (locked_tcb == NULL) {
1402                                                                 SCTP_INP_DECR_REF(inp);
1403                                                         } else if (locked_tcb != stcb) {
1404                                                                 SCTP_TCB_LOCK(locked_tcb);
1405                                                         }
1406                                                         if (locked_tcb) {
1407                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1408                                                         }
1409                                                         SCTP_INP_WUNLOCK(inp);
1410                                                         SCTP_INP_INFO_RUNLOCK();
1411                                                         return (stcb);
1412                                                 }
1413                                                 break;
1414                                         }
1415 #endif
1416 #ifdef INET6
1417                                 case AF_INET6:
1418                                         {
1419                                                 struct sockaddr_in6 *sin6,
1420                                                             *rsin6;
1421
1422                                                 sin6 = (struct sockaddr_in6 *)
1423                                                     &net->ro._l_addr;
1424                                                 rsin6 = (struct sockaddr_in6 *)remote;
1425                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1426                                                     rsin6)) {
1427                                                         /* found it */
1428                                                         if (netp != NULL) {
1429                                                                 *netp = net;
1430                                                         }
1431                                                         if (locked_tcb == NULL) {
1432                                                                 SCTP_INP_DECR_REF(inp);
1433                                                         } else if (locked_tcb != stcb) {
1434                                                                 SCTP_TCB_LOCK(locked_tcb);
1435                                                         }
1436                                                         if (locked_tcb) {
1437                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1438                                                         }
1439                                                         SCTP_INP_WUNLOCK(inp);
1440                                                         SCTP_INP_INFO_RUNLOCK();
1441                                                         return (stcb);
1442                                                 }
1443                                                 break;
1444                                         }
1445 #endif
1446                                 default:
1447                                         /* TSNH */
1448                                         break;
1449                                 }
1450                         }
1451                         SCTP_TCB_UNLOCK(stcb);
1452                 }
1453         }
1454 null_return:
1455         /* clean up for returning null */
1456         if (locked_tcb) {
1457                 SCTP_TCB_LOCK(locked_tcb);
1458                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1459         }
1460         SCTP_INP_WUNLOCK(inp);
1461         SCTP_INP_INFO_RUNLOCK();
1462         /* not found */
1463         return (NULL);
1464 }
1465
1466 /*
1467  * Find an association for a specific endpoint using the association id given
1468  * out in the COMM_UP notification
1469  */
1470
1471 struct sctp_tcb *
1472 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1473 {
1474         /*
1475          * Use my the assoc_id to find a endpoint
1476          */
1477         struct sctpasochead *head;
1478         struct sctp_tcb *stcb;
1479         uint32_t id;
1480
1481         if (inp == NULL) {
1482                 SCTP_PRINTF("TSNH ep_associd\n");
1483                 return (NULL);
1484         }
1485         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1486                 SCTP_PRINTF("TSNH ep_associd0\n");
1487                 return (NULL);
1488         }
1489         id = (uint32_t) asoc_id;
1490         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1491         if (head == NULL) {
1492                 /* invalid id TSNH */
1493                 SCTP_PRINTF("TSNH ep_associd1\n");
1494                 return (NULL);
1495         }
1496         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1497                 if (stcb->asoc.assoc_id == id) {
1498                         if (inp != stcb->sctp_ep) {
1499                                 /*
1500                                  * some other guy has the same id active (id
1501                                  * collision ??).
1502                                  */
1503                                 SCTP_PRINTF("TSNH ep_associd2\n");
1504                                 continue;
1505                         }
1506                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1507                                 continue;
1508                         }
1509                         if (want_lock) {
1510                                 SCTP_TCB_LOCK(stcb);
1511                         }
1512                         return (stcb);
1513                 }
1514         }
1515         return (NULL);
1516 }
1517
1518
1519 struct sctp_tcb *
1520 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1521 {
1522         struct sctp_tcb *stcb;
1523
1524         SCTP_INP_RLOCK(inp);
1525         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1526         SCTP_INP_RUNLOCK(inp);
1527         return (stcb);
1528 }
1529
1530
1531 static struct sctp_inpcb *
1532 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1533     uint16_t lport, uint32_t vrf_id)
1534 {
1535         struct sctp_inpcb *inp;
1536         struct sctp_laddr *laddr;
1537
1538 #ifdef INET
1539         struct sockaddr_in *sin;
1540
1541 #endif
1542 #ifdef INET6
1543         struct sockaddr_in6 *sin6;
1544         struct sockaddr_in6 *intf_addr6;
1545
1546 #endif
1547
1548         int fnd;
1549
1550         /*
1551          * Endpoint probe expects that the INP_INFO is locked.
1552          */
1553 #ifdef INET
1554         sin = NULL;
1555 #endif
1556 #ifdef INET6
1557         sin6 = NULL;
1558 #endif
1559         switch (nam->sa_family) {
1560 #ifdef INET
1561         case AF_INET:
1562                 sin = (struct sockaddr_in *)nam;
1563                 break;
1564 #endif
1565 #ifdef INET6
1566         case AF_INET6:
1567                 sin6 = (struct sockaddr_in6 *)nam;
1568                 break;
1569 #endif
1570         default:
1571                 /* unsupported family */
1572                 return (NULL);
1573         }
1574
1575         if (head == NULL)
1576                 return (NULL);
1577
1578         LIST_FOREACH(inp, head, sctp_hash) {
1579                 SCTP_INP_RLOCK(inp);
1580                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1581                         SCTP_INP_RUNLOCK(inp);
1582                         continue;
1583                 }
1584                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1585                     (inp->sctp_lport == lport)) {
1586                         /* got it */
1587 #ifdef INET
1588                         if ((nam->sa_family == AF_INET) &&
1589                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1590                             SCTP_IPV6_V6ONLY(inp)) {
1591                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1592                                 SCTP_INP_RUNLOCK(inp);
1593                                 continue;
1594                         }
1595 #endif
1596 #ifdef INET6
1597                         /* A V6 address and the endpoint is NOT bound V6 */
1598                         if (nam->sa_family == AF_INET6 &&
1599                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1600                                 SCTP_INP_RUNLOCK(inp);
1601                                 continue;
1602                         }
1603 #endif
1604                         /* does a VRF id match? */
1605                         fnd = 0;
1606                         if (inp->def_vrf_id == vrf_id)
1607                                 fnd = 1;
1608
1609                         SCTP_INP_RUNLOCK(inp);
1610                         if (!fnd)
1611                                 continue;
1612                         return (inp);
1613                 }
1614                 SCTP_INP_RUNLOCK(inp);
1615         }
1616         switch (nam->sa_family) {
1617 #ifdef INET
1618         case AF_INET:
1619                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1620                         /* Can't hunt for one that has no address specified */
1621                         return (NULL);
1622                 }
1623                 break;
1624 #endif
1625 #ifdef INET6
1626         case AF_INET6:
1627                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1628                         /* Can't hunt for one that has no address specified */
1629                         return (NULL);
1630                 }
1631                 break;
1632 #endif
1633         default:
1634                 break;
1635         }
1636         /*
1637          * ok, not bound to all so see if we can find a EP bound to this
1638          * address.
1639          */
1640         LIST_FOREACH(inp, head, sctp_hash) {
1641                 SCTP_INP_RLOCK(inp);
1642                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1643                         SCTP_INP_RUNLOCK(inp);
1644                         continue;
1645                 }
1646                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1647                         SCTP_INP_RUNLOCK(inp);
1648                         continue;
1649                 }
1650                 /*
1651                  * Ok this could be a likely candidate, look at all of its
1652                  * addresses
1653                  */
1654                 if (inp->sctp_lport != lport) {
1655                         SCTP_INP_RUNLOCK(inp);
1656                         continue;
1657                 }
1658                 /* does a VRF id match? */
1659                 fnd = 0;
1660                 if (inp->def_vrf_id == vrf_id)
1661                         fnd = 1;
1662
1663                 if (!fnd) {
1664                         SCTP_INP_RUNLOCK(inp);
1665                         continue;
1666                 }
1667                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1668                         if (laddr->ifa == NULL) {
1669                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1670                                     __FUNCTION__);
1671                                 continue;
1672                         }
1673                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1674                             laddr->ifa);
1675                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1676                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1677                                 continue;
1678                         }
1679                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1680                                 /* possible, see if it matches */
1681                                 switch (nam->sa_family) {
1682 #ifdef INET
1683                                 case AF_INET:
1684                                         if (sin->sin_addr.s_addr ==
1685                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1686                                                 SCTP_INP_RUNLOCK(inp);
1687                                                 return (inp);
1688                                         }
1689                                         break;
1690 #endif
1691 #ifdef INET6
1692                                 case AF_INET6:
1693                                         intf_addr6 = &laddr->ifa->address.sin6;
1694                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1695                                             intf_addr6)) {
1696                                                 SCTP_INP_RUNLOCK(inp);
1697                                                 return (inp);
1698                                         }
1699                                         break;
1700 #endif
1701                                 }
1702                         }
1703                 }
1704                 SCTP_INP_RUNLOCK(inp);
1705         }
1706         return (NULL);
1707 }
1708
1709
1710 static struct sctp_inpcb *
1711 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1712 {
1713         struct sctppcbhead *head;
1714         struct sctp_inpcb *t_inp;
1715         int fnd;
1716
1717         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1718             SCTP_BASE_INFO(hashmark))];
1719         LIST_FOREACH(t_inp, head, sctp_hash) {
1720                 if (t_inp->sctp_lport != lport) {
1721                         continue;
1722                 }
1723                 /* is it in the VRF in question */
1724                 fnd = 0;
1725                 if (t_inp->def_vrf_id == vrf_id)
1726                         fnd = 1;
1727                 if (!fnd)
1728                         continue;
1729
1730                 /* This one is in use. */
1731                 /* check the v6/v4 binding issue */
1732                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1733                     SCTP_IPV6_V6ONLY(t_inp)) {
1734                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1735                                 /* collision in V6 space */
1736                                 return (t_inp);
1737                         } else {
1738                                 /* inp is BOUND_V4 no conflict */
1739                                 continue;
1740                         }
1741                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1742                         /* t_inp is bound v4 and v6, conflict always */
1743                         return (t_inp);
1744                 } else {
1745                         /* t_inp is bound only V4 */
1746                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1747                             SCTP_IPV6_V6ONLY(inp)) {
1748                                 /* no conflict */
1749                                 continue;
1750                         }
1751                         /* else fall through to conflict */
1752                 }
1753                 return (t_inp);
1754         }
1755         return (NULL);
1756 }
1757
1758
1759 int
1760 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1761 {
1762         /* For 1-2-1 with port reuse */
1763         struct sctppcbhead *head;
1764         struct sctp_inpcb *tinp;
1765
1766         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1767                 /* only works with port reuse on */
1768                 return (-1);
1769         }
1770         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1771                 return (0);
1772         }
1773         SCTP_INP_RUNLOCK(inp);
1774         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1775             SCTP_BASE_INFO(hashmark))];
1776         /* Kick out all non-listeners to the TCP hash */
1777         LIST_FOREACH(tinp, head, sctp_hash) {
1778                 if (tinp->sctp_lport != inp->sctp_lport) {
1779                         continue;
1780                 }
1781                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1782                         continue;
1783                 }
1784                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1785                         continue;
1786                 }
1787                 if (tinp->sctp_socket->so_qlimit) {
1788                         continue;
1789                 }
1790                 SCTP_INP_WLOCK(tinp);
1791                 LIST_REMOVE(tinp, sctp_hash);
1792                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1793                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1794                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1795                 SCTP_INP_WUNLOCK(tinp);
1796         }
1797         SCTP_INP_WLOCK(inp);
1798         /* Pull from where he was */
1799         LIST_REMOVE(inp, sctp_hash);
1800         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1801         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1802         LIST_INSERT_HEAD(head, inp, sctp_hash);
1803         SCTP_INP_WUNLOCK(inp);
1804         SCTP_INP_RLOCK(inp);
1805         return (0);
1806 }
1807
1808
1809 struct sctp_inpcb *
1810 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1811     uint32_t vrf_id)
1812 {
1813         /*
1814          * First we check the hash table to see if someone has this port
1815          * bound with just the port.
1816          */
1817         struct sctp_inpcb *inp;
1818         struct sctppcbhead *head;
1819         int lport;
1820         unsigned int i;
1821
1822 #ifdef INET
1823         struct sockaddr_in *sin;
1824
1825 #endif
1826 #ifdef INET6
1827         struct sockaddr_in6 *sin6;
1828
1829 #endif
1830
1831         switch (nam->sa_family) {
1832 #ifdef INET
1833         case AF_INET:
1834                 sin = (struct sockaddr_in *)nam;
1835                 lport = sin->sin_port;
1836                 break;
1837 #endif
1838 #ifdef INET6
1839         case AF_INET6:
1840                 sin6 = (struct sockaddr_in6 *)nam;
1841                 lport = sin6->sin6_port;
1842                 break;
1843 #endif
1844         default:
1845                 return (NULL);
1846         }
1847         /*
1848          * I could cheat here and just cast to one of the types but we will
1849          * do it right. It also provides the check against an Unsupported
1850          * type too.
1851          */
1852         /* Find the head of the ALLADDR chain */
1853         if (have_lock == 0) {
1854                 SCTP_INP_INFO_RLOCK();
1855         }
1856         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1857             SCTP_BASE_INFO(hashmark))];
1858         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1859
1860         /*
1861          * If the TCP model exists it could be that the main listening
1862          * endpoint is gone but there still exists a connected socket for
1863          * this guy. If so we can return the first one that we find. This
1864          * may NOT be the correct one so the caller should be wary on the
1865          * returned INP. Currently the only caller that sets find_tcp_pool
1866          * is in bindx where we are verifying that a user CAN bind the
1867          * address. He either has bound it already, or someone else has, or
1868          * its open to bind, so this is good enough.
1869          */
1870         if (inp == NULL && find_tcp_pool) {
1871                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1872                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1873                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1874                         if (inp) {
1875                                 break;
1876                         }
1877                 }
1878         }
1879         if (inp) {
1880                 SCTP_INP_INCR_REF(inp);
1881         }
1882         if (have_lock == 0) {
1883                 SCTP_INP_INFO_RUNLOCK();
1884         }
1885         return (inp);
1886 }
1887
1888 /*
1889  * Find an association for an endpoint with the pointer to whom you want to
1890  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1891  * need to change the *to to some other struct like a mbuf...
1892  */
1893 struct sctp_tcb *
1894 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1895     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1896     uint32_t vrf_id)
1897 {
1898         struct sctp_inpcb *inp = NULL;
1899         struct sctp_tcb *retval;
1900
1901         SCTP_INP_INFO_RLOCK();
1902         if (find_tcp_pool) {
1903                 if (inp_p != NULL) {
1904                         retval = sctp_tcb_special_locate(inp_p, from, to, netp,
1905                             vrf_id);
1906                 } else {
1907                         retval = sctp_tcb_special_locate(&inp, from, to, netp,
1908                             vrf_id);
1909                 }
1910                 if (retval != NULL) {
1911                         SCTP_INP_INFO_RUNLOCK();
1912                         return (retval);
1913                 }
1914         }
1915         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1916         if (inp_p != NULL) {
1917                 *inp_p = inp;
1918         }
1919         SCTP_INP_INFO_RUNLOCK();
1920
1921         if (inp == NULL) {
1922                 return (NULL);
1923         }
1924         /*
1925          * ok, we have an endpoint, now lets find the assoc for it (if any)
1926          * we now place the source address or from in the to of the find
1927          * endpoint call. Since in reality this chain is used from the
1928          * inbound packet side.
1929          */
1930         if (inp_p != NULL) {
1931                 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1932                     NULL);
1933         } else {
1934                 retval = sctp_findassociation_ep_addr(&inp, from, netp, to,
1935                     NULL);
1936         }
1937         return retval;
1938 }
1939
1940
1941 /*
1942  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1943  * find all addresses that the sender has specified in any address list. Each
1944  * address will be used to lookup the TCB and see if one exits.
1945  */
1946 static struct sctp_tcb *
1947 sctp_findassociation_special_addr(struct mbuf *m, int offset,
1948     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1949     struct sockaddr *dest)
1950 {
1951         struct sctp_paramhdr *phdr, parm_buf;
1952         struct sctp_tcb *retval;
1953         uint32_t ptype, plen;
1954
1955 #ifdef INET
1956         struct sockaddr_in sin4;
1957
1958 #endif
1959 #ifdef INET6
1960         struct sockaddr_in6 sin6;
1961
1962 #endif
1963
1964 #ifdef INET
1965         memset(&sin4, 0, sizeof(sin4));
1966         sin4.sin_len = sizeof(sin4);
1967         sin4.sin_family = AF_INET;
1968         sin4.sin_port = sh->src_port;
1969 #endif
1970 #ifdef INET6
1971         memset(&sin6, 0, sizeof(sin6));
1972         sin6.sin6_len = sizeof(sin6);
1973         sin6.sin6_family = AF_INET6;
1974         sin6.sin6_port = sh->src_port;
1975 #endif
1976
1977         retval = NULL;
1978         offset += sizeof(struct sctp_init_chunk);
1979
1980         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1981         while (phdr != NULL) {
1982                 /* now we must see if we want the parameter */
1983                 ptype = ntohs(phdr->param_type);
1984                 plen = ntohs(phdr->param_length);
1985                 if (plen == 0) {
1986                         break;
1987                 }
1988 #ifdef INET
1989                 if (ptype == SCTP_IPV4_ADDRESS &&
1990                     plen == sizeof(struct sctp_ipv4addr_param)) {
1991                         /* Get the rest of the address */
1992                         struct sctp_ipv4addr_param ip4_parm, *p4;
1993
1994                         phdr = sctp_get_next_param(m, offset,
1995                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
1996                         if (phdr == NULL) {
1997                                 return (NULL);
1998                         }
1999                         p4 = (struct sctp_ipv4addr_param *)phdr;
2000                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2001                         /* look it up */
2002                         retval = sctp_findassociation_ep_addr(inp_p,
2003                             (struct sockaddr *)&sin4, netp, dest, NULL);
2004                         if (retval != NULL) {
2005                                 return (retval);
2006                         }
2007                 }
2008 #endif
2009 #ifdef INET6
2010                 if (ptype == SCTP_IPV6_ADDRESS &&
2011                     plen == sizeof(struct sctp_ipv6addr_param)) {
2012                         /* Get the rest of the address */
2013                         struct sctp_ipv6addr_param ip6_parm, *p6;
2014
2015                         phdr = sctp_get_next_param(m, offset,
2016                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
2017                         if (phdr == NULL) {
2018                                 return (NULL);
2019                         }
2020                         p6 = (struct sctp_ipv6addr_param *)phdr;
2021                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2022                         /* look it up */
2023                         retval = sctp_findassociation_ep_addr(inp_p,
2024                             (struct sockaddr *)&sin6, netp, dest, NULL);
2025                         if (retval != NULL) {
2026                                 return (retval);
2027                         }
2028                 }
2029 #endif
2030                 offset += SCTP_SIZE32(plen);
2031                 phdr = sctp_get_next_param(m, offset, &parm_buf,
2032                     sizeof(parm_buf));
2033         }
2034         return (NULL);
2035 }
2036
2037 static struct sctp_tcb *
2038 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2039     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2040     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2041 {
2042         /*
2043          * Use my vtag to hash. If we find it we then verify the source addr
2044          * is in the assoc. If all goes well we save a bit on rec of a
2045          * packet.
2046          */
2047         struct sctpasochead *head;
2048         struct sctp_nets *net;
2049         struct sctp_tcb *stcb;
2050
2051         *netp = NULL;
2052         *inp_p = NULL;
2053         SCTP_INP_INFO_RLOCK();
2054         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2055             SCTP_BASE_INFO(hashasocmark))];
2056         if (head == NULL) {
2057                 /* invalid vtag */
2058                 SCTP_INP_INFO_RUNLOCK();
2059                 return (NULL);
2060         }
2061         LIST_FOREACH(stcb, head, sctp_asocs) {
2062                 SCTP_INP_RLOCK(stcb->sctp_ep);
2063                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2064                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2065                         continue;
2066                 }
2067                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2068                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2069                         continue;
2070                 }
2071                 SCTP_TCB_LOCK(stcb);
2072                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2073                 if (stcb->asoc.my_vtag == vtag) {
2074                         /* candidate */
2075                         if (stcb->rport != rport) {
2076                                 SCTP_TCB_UNLOCK(stcb);
2077                                 continue;
2078                         }
2079                         if (stcb->sctp_ep->sctp_lport != lport) {
2080                                 SCTP_TCB_UNLOCK(stcb);
2081                                 continue;
2082                         }
2083                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2084                                 SCTP_TCB_UNLOCK(stcb);
2085                                 continue;
2086                         }
2087                         /* RRS:Need toaddr check here */
2088                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2089                                 /* Endpoint does not own this address */
2090                                 SCTP_TCB_UNLOCK(stcb);
2091                                 continue;
2092                         }
2093                         if (remote_tag) {
2094                                 /*
2095                                  * If we have both vtags that's all we match
2096                                  * on
2097                                  */
2098                                 if (stcb->asoc.peer_vtag == remote_tag) {
2099                                         /*
2100                                          * If both tags match we consider it
2101                                          * conclusive and check NO
2102                                          * source/destination addresses
2103                                          */
2104                                         goto conclusive;
2105                                 }
2106                         }
2107                         if (skip_src_check) {
2108                 conclusive:
2109                                 if (from) {
2110                                         *netp = sctp_findnet(stcb, from);
2111                                 } else {
2112                                         *netp = NULL;   /* unknown */
2113                                 }
2114                                 if (inp_p)
2115                                         *inp_p = stcb->sctp_ep;
2116                                 SCTP_INP_INFO_RUNLOCK();
2117                                 return (stcb);
2118                         }
2119                         net = sctp_findnet(stcb, from);
2120                         if (net) {
2121                                 /* yep its him. */
2122                                 *netp = net;
2123                                 SCTP_STAT_INCR(sctps_vtagexpress);
2124                                 *inp_p = stcb->sctp_ep;
2125                                 SCTP_INP_INFO_RUNLOCK();
2126                                 return (stcb);
2127                         } else {
2128                                 /*
2129                                  * not him, this should only happen in rare
2130                                  * cases so I peg it.
2131                                  */
2132                                 SCTP_STAT_INCR(sctps_vtagbogus);
2133                         }
2134                 }
2135                 SCTP_TCB_UNLOCK(stcb);
2136         }
2137         SCTP_INP_INFO_RUNLOCK();
2138         return (NULL);
2139 }
2140
2141 /*
2142  * Find an association with the pointer to the inbound IP packet. This can be
2143  * a IPv4 or IPv6 packet.
2144  */
2145 struct sctp_tcb *
2146 sctp_findassociation_addr(struct mbuf *m, int offset,
2147     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2148     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2149 {
2150         int find_tcp_pool;
2151         struct ip *iph;
2152         struct sctp_tcb *retval;
2153         struct sockaddr_storage to_store, from_store;
2154         struct sockaddr *to = (struct sockaddr *)&to_store;
2155         struct sockaddr *from = (struct sockaddr *)&from_store;
2156         struct sctp_inpcb *inp;
2157
2158         iph = mtod(m, struct ip *);
2159         switch (iph->ip_v) {
2160 #ifdef INET
2161         case IPVERSION:
2162                 {
2163                         /* its IPv4 */
2164                         struct sockaddr_in *from4;
2165
2166                         from4 = (struct sockaddr_in *)&from_store;
2167                         bzero(from4, sizeof(*from4));
2168                         from4->sin_family = AF_INET;
2169                         from4->sin_len = sizeof(struct sockaddr_in);
2170                         from4->sin_addr.s_addr = iph->ip_src.s_addr;
2171                         from4->sin_port = sh->src_port;
2172                         break;
2173                 }
2174 #endif
2175 #ifdef INET6
2176         case IPV6_VERSION >> 4:
2177                 {
2178                         /* its IPv6 */
2179                         struct ip6_hdr *ip6;
2180                         struct sockaddr_in6 *from6;
2181
2182                         ip6 = mtod(m, struct ip6_hdr *);
2183                         from6 = (struct sockaddr_in6 *)&from_store;
2184                         bzero(from6, sizeof(*from6));
2185                         from6->sin6_family = AF_INET6;
2186                         from6->sin6_len = sizeof(struct sockaddr_in6);
2187                         from6->sin6_addr = ip6->ip6_src;
2188                         from6->sin6_port = sh->src_port;
2189                         /* Get the scopes in properly to the sin6 addr's */
2190                         sa6_embedscope(from6, MODULE_GLOBAL(ip6_use_defzone));
2191                         break;
2192                 }
2193 #endif
2194         default:
2195                 /* Currently not supported. */
2196                 return (NULL);
2197         }
2198
2199
2200         switch (iph->ip_v) {
2201 #ifdef INET
2202         case IPVERSION:
2203                 {
2204                         /* its IPv4 */
2205                         struct sockaddr_in *to4;
2206
2207                         to4 = (struct sockaddr_in *)&to_store;
2208                         bzero(to4, sizeof(*to4));
2209                         to4->sin_family = AF_INET;
2210                         to4->sin_len = sizeof(struct sockaddr_in);
2211                         to4->sin_addr.s_addr = iph->ip_dst.s_addr;
2212                         to4->sin_port = sh->dest_port;
2213                         break;
2214                 }
2215 #endif
2216 #ifdef INET6
2217         case IPV6_VERSION >> 4:
2218                 {
2219                         /* its IPv6 */
2220                         struct ip6_hdr *ip6;
2221                         struct sockaddr_in6 *to6;
2222
2223                         ip6 = mtod(m, struct ip6_hdr *);
2224                         to6 = (struct sockaddr_in6 *)&to_store;
2225                         bzero(to6, sizeof(*to6));
2226                         to6->sin6_family = AF_INET6;
2227                         to6->sin6_len = sizeof(struct sockaddr_in6);
2228                         to6->sin6_addr = ip6->ip6_dst;
2229                         to6->sin6_port = sh->dest_port;
2230                         /* Get the scopes in properly to the sin6 addr's */
2231                         sa6_embedscope(to6, MODULE_GLOBAL(ip6_use_defzone));
2232                         break;
2233                 }
2234 #endif
2235         default:
2236                 /* TSNH */
2237                 break;
2238         }
2239         if (sh->v_tag) {
2240                 /* we only go down this path if vtag is non-zero */
2241                 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag),
2242                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2243                 if (retval) {
2244                         return (retval);
2245                 }
2246         }
2247         find_tcp_pool = 0;
2248         if ((ch->chunk_type != SCTP_INITIATION) &&
2249             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2250             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2251             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2252                 /* Other chunk types go to the tcp pool. */
2253                 find_tcp_pool = 1;
2254         }
2255         if (inp_p) {
2256                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
2257                     find_tcp_pool, vrf_id);
2258                 inp = *inp_p;
2259         } else {
2260                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
2261                     find_tcp_pool, vrf_id);
2262         }
2263         SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp);
2264         if (retval == NULL && inp) {
2265                 /* Found a EP but not this address */
2266                 if ((ch->chunk_type == SCTP_INITIATION) ||
2267                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2268                         /*-
2269                          * special hook, we do NOT return linp or an
2270                          * association that is linked to an existing
2271                          * association that is under the TCP pool (i.e. no
2272                          * listener exists). The endpoint finding routine
2273                          * will always find a listener before examining the
2274                          * TCP pool.
2275                          */
2276                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2277                                 if (inp_p) {
2278                                         *inp_p = NULL;
2279                                 }
2280                                 return (NULL);
2281                         }
2282                         retval = sctp_findassociation_special_addr(m,
2283                             offset, sh, &inp, netp, to);
2284                         if (inp_p != NULL) {
2285                                 *inp_p = inp;
2286                         }
2287                 }
2288         }
2289         SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval);
2290         return (retval);
2291 }
2292
2293 /*
2294  * lookup an association by an ASCONF lookup address.
2295  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2296  */
2297 struct sctp_tcb *
2298 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2299     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2300 {
2301         struct sctp_tcb *stcb;
2302         struct sockaddr_storage local_store, remote_store;
2303         struct sockaddr *to;
2304         struct ip *iph;
2305         struct sctp_paramhdr parm_buf, *phdr;
2306         int ptype;
2307         int zero_address = 0;
2308
2309 #ifdef INET
2310         struct sockaddr_in *sin;
2311
2312 #endif
2313 #ifdef INET6
2314         struct ip6_hdr *ip6;
2315         struct sockaddr_in6 *sin6;
2316
2317 #endif
2318
2319         memset(&local_store, 0, sizeof(local_store));
2320         memset(&remote_store, 0, sizeof(remote_store));
2321         to = (struct sockaddr *)&local_store;
2322         /* First get the destination address setup too. */
2323         iph = mtod(m, struct ip *);
2324         switch (iph->ip_v) {
2325 #ifdef INET
2326         case IPVERSION:
2327                 /* its IPv4 */
2328                 sin = (struct sockaddr_in *)&local_store;
2329                 sin->sin_family = AF_INET;
2330                 sin->sin_len = sizeof(*sin);
2331                 sin->sin_port = sh->dest_port;
2332                 sin->sin_addr.s_addr = iph->ip_dst.s_addr;
2333                 break;
2334 #endif
2335 #ifdef INET6
2336         case IPV6_VERSION >> 4:
2337                 /* its IPv6 */
2338                 ip6 = mtod(m, struct ip6_hdr *);
2339                 sin6 = (struct sockaddr_in6 *)&local_store;
2340                 sin6->sin6_family = AF_INET6;
2341                 sin6->sin6_len = sizeof(*sin6);
2342                 sin6->sin6_port = sh->dest_port;
2343                 sin6->sin6_addr = ip6->ip6_dst;
2344                 break;
2345 #endif
2346         default:
2347                 return NULL;
2348         }
2349
2350         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2351             &parm_buf, sizeof(struct sctp_paramhdr));
2352         if (phdr == NULL) {
2353                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2354                     __FUNCTION__);
2355                 return NULL;
2356         }
2357         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2358         /* get the correlation address */
2359         switch (ptype) {
2360 #ifdef INET6
2361         case SCTP_IPV6_ADDRESS:
2362                 {
2363                         /* ipv6 address param */
2364                         struct sctp_ipv6addr_param *p6, p6_buf;
2365
2366                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2367                                 return NULL;
2368                         }
2369                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2370                             offset + sizeof(struct sctp_asconf_chunk),
2371                             &p6_buf.ph, sizeof(*p6));
2372                         if (p6 == NULL) {
2373                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2374                                     __FUNCTION__);
2375                                 return (NULL);
2376                         }
2377                         sin6 = (struct sockaddr_in6 *)&remote_store;
2378                         sin6->sin6_family = AF_INET6;
2379                         sin6->sin6_len = sizeof(*sin6);
2380                         sin6->sin6_port = sh->src_port;
2381                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2382                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2383                                 zero_address = 1;
2384                         break;
2385                 }
2386 #endif
2387 #ifdef INET
2388         case SCTP_IPV4_ADDRESS:
2389                 {
2390                         /* ipv4 address param */
2391                         struct sctp_ipv4addr_param *p4, p4_buf;
2392
2393                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2394                                 return NULL;
2395                         }
2396                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2397                             offset + sizeof(struct sctp_asconf_chunk),
2398                             &p4_buf.ph, sizeof(*p4));
2399                         if (p4 == NULL) {
2400                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2401                                     __FUNCTION__);
2402                                 return (NULL);
2403                         }
2404                         sin = (struct sockaddr_in *)&remote_store;
2405                         sin->sin_family = AF_INET;
2406                         sin->sin_len = sizeof(*sin);
2407                         sin->sin_port = sh->src_port;
2408                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2409                         if (sin->sin_addr.s_addr == INADDR_ANY)
2410                                 zero_address = 1;
2411                         break;
2412                 }
2413 #endif
2414         default:
2415                 /* invalid address param type */
2416                 return NULL;
2417         }
2418
2419         if (zero_address) {
2420                 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p,
2421                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2422                 /*
2423                  * SCTP_PRINTF("findassociation_ep_asconf: zero lookup
2424                  * address finds stcb 0x%x\n", (uint32_t)stcb);
2425                  */
2426         } else {
2427                 stcb = sctp_findassociation_ep_addr(inp_p,
2428                     (struct sockaddr *)&remote_store, netp,
2429                     to, NULL);
2430         }
2431         return (stcb);
2432 }
2433
2434
2435 /*
2436  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2437  * addresses. This way if we don't get a bind we by default pick a ephemeral
2438  * port with all addresses bound.
2439  */
2440 int
2441 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2442 {
2443         /*
2444          * we get called when a new endpoint starts up. We need to allocate
2445          * the sctp_inpcb structure from the zone and init it. Mark it as
2446          * unbound and find a port that we can use as an ephemeral with
2447          * INADDR_ANY. If the user binds later no problem we can then add in
2448          * the specific addresses. And setup the default parameters for the
2449          * EP.
2450          */
2451         int i, error;
2452         struct sctp_inpcb *inp;
2453         struct sctp_pcb *m;
2454         struct timeval time;
2455         sctp_sharedkey_t *null_key;
2456
2457         error = 0;
2458
2459         SCTP_INP_INFO_WLOCK();
2460         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2461         if (inp == NULL) {
2462                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2463                 SCTP_INP_INFO_WUNLOCK();
2464                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2465                 return (ENOBUFS);
2466         }
2467         /* zap it */
2468         bzero(inp, sizeof(*inp));
2469
2470         /* bump generations */
2471         /* setup socket pointers */
2472         inp->sctp_socket = so;
2473         inp->ip_inp.inp.inp_socket = so;
2474 #ifdef INET6
2475         if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2476                 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2477         }
2478 #endif
2479         inp->sctp_associd_counter = 1;
2480         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2481         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2482         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2483         inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable);
2484         /* init the small hash table we use to track asocid <-> tcb */
2485         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2486         if (inp->sctp_asocidhash == NULL) {
2487                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2488                 SCTP_INP_INFO_WUNLOCK();
2489                 return (ENOBUFS);
2490         }
2491 #ifdef IPSEC
2492         {
2493                 struct inpcbpolicy *pcb_sp = NULL;
2494
2495                 error = ipsec_init_policy(so, &pcb_sp);
2496                 /* Arrange to share the policy */
2497                 inp->ip_inp.inp.inp_sp = pcb_sp;
2498                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2499         }
2500         if (error != 0) {
2501                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2502                 SCTP_INP_INFO_WUNLOCK();
2503                 return error;
2504         }
2505 #endif                          /* IPSEC */
2506         SCTP_INCR_EP_COUNT();
2507         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2508         SCTP_INP_INFO_WUNLOCK();
2509
2510         so->so_pcb = (caddr_t)inp;
2511
2512         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2513                 /* UDP style socket */
2514                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2515                     SCTP_PCB_FLAGS_UNBOUND);
2516                 /* Be sure it is NON-BLOCKING IO for UDP */
2517                 /* SCTP_SET_SO_NBIO(so); */
2518         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2519                 /* TCP style socket */
2520                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2521                     SCTP_PCB_FLAGS_UNBOUND);
2522                 /* Be sure we have blocking IO by default */
2523                 SCTP_CLEAR_SO_NBIO(so);
2524         } else {
2525                 /*
2526                  * unsupported socket type (RAW, etc)- in case we missed it
2527                  * in protosw
2528                  */
2529                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2530                 so->so_pcb = NULL;
2531                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2532                 return (EOPNOTSUPP);
2533         }
2534         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2535                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2536                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2537         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2538                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2539                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2540         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2541                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2542                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2543         }
2544         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2545             &inp->sctp_hashmark);
2546         if (inp->sctp_tcbhash == NULL) {
2547                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2548                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2549                 so->so_pcb = NULL;
2550                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2551                 return (ENOBUFS);
2552         }
2553         inp->def_vrf_id = vrf_id;
2554
2555         SCTP_INP_INFO_WLOCK();
2556         SCTP_INP_LOCK_INIT(inp);
2557         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2558         SCTP_INP_READ_INIT(inp);
2559         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2560         /* lock the new ep */
2561         SCTP_INP_WLOCK(inp);
2562
2563         /* add it to the info area */
2564         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2565         SCTP_INP_INFO_WUNLOCK();
2566
2567         TAILQ_INIT(&inp->read_queue);
2568         LIST_INIT(&inp->sctp_addr_list);
2569
2570         LIST_INIT(&inp->sctp_asoc_list);
2571
2572 #ifdef SCTP_TRACK_FREED_ASOCS
2573         /* TEMP CODE */
2574         LIST_INIT(&inp->sctp_asoc_free_list);
2575 #endif
2576         /* Init the timer structure for signature change */
2577         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2578         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2579
2580         /* now init the actual endpoint default data */
2581         m = &inp->sctp_ep;
2582
2583         /* setup the base timeout information */
2584         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2585         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2586         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2587         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2588         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2589         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2590         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2591         /* all max/min max are in ms */
2592         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2593         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2594         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2595         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2596         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2597
2598         m->max_open_streams_intome = MAX_SCTP_STREAMS;
2599
2600         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2601         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2602         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2603         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2604         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2605         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2606         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2607         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2608
2609         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2610         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2611         /* number of streams to pre-open on a association */
2612         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2613
2614         /* Add adaptation cookie */
2615         m->adaptation_layer_indicator = 0x504C5253;
2616
2617         /* seed random number generator */
2618         m->random_counter = 1;
2619         m->store_at = SCTP_SIGNATURE_SIZE;
2620         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2621         sctp_fill_random_store(m);
2622
2623         /* Minimum cookie size */
2624         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2625             sizeof(struct sctp_state_cookie);
2626         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2627
2628         /* Setup the initial secret */
2629         (void)SCTP_GETTIME_TIMEVAL(&time);
2630         m->time_of_secret_change = time.tv_sec;
2631
2632         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2633                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2634         }
2635         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2636
2637         /* How long is a cookie good for ? */
2638         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2639         /*
2640          * Initialize authentication parameters
2641          */
2642         m->local_hmacs = sctp_default_supported_hmaclist();
2643         m->local_auth_chunks = sctp_alloc_chunklist();
2644         m->default_dscp = 0;
2645 #ifdef INET6
2646         m->default_flowlabel = 0;
2647 #endif
2648         m->port = 0;            /* encapsulation disabled by default */
2649         sctp_auth_set_default_chunks(m->local_auth_chunks);
2650         LIST_INIT(&m->shared_keys);
2651         /* add default NULL key as key id 0 */
2652         null_key = sctp_alloc_sharedkey();
2653         sctp_insert_sharedkey(&m->shared_keys, null_key);
2654         SCTP_INP_WUNLOCK(inp);
2655 #ifdef SCTP_LOG_CLOSING
2656         sctp_log_closing(inp, NULL, 12);
2657 #endif
2658         return (error);
2659 }
2660
2661
2662 void
2663 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2664     struct sctp_tcb *stcb)
2665 {
2666         struct sctp_nets *net;
2667         uint16_t lport, rport;
2668         struct sctppcbhead *head;
2669         struct sctp_laddr *laddr, *oladdr;
2670
2671         atomic_add_int(&stcb->asoc.refcnt, 1);
2672         SCTP_TCB_UNLOCK(stcb);
2673         SCTP_INP_INFO_WLOCK();
2674         SCTP_INP_WLOCK(old_inp);
2675         SCTP_INP_WLOCK(new_inp);
2676         SCTP_TCB_LOCK(stcb);
2677         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2678
2679         new_inp->sctp_ep.time_of_secret_change =
2680             old_inp->sctp_ep.time_of_secret_change;
2681         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2682             sizeof(old_inp->sctp_ep.secret_key));
2683         new_inp->sctp_ep.current_secret_number =
2684             old_inp->sctp_ep.current_secret_number;
2685         new_inp->sctp_ep.last_secret_number =
2686             old_inp->sctp_ep.last_secret_number;
2687         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2688
2689         /* make it so new data pours into the new socket */
2690         stcb->sctp_socket = new_inp->sctp_socket;
2691         stcb->sctp_ep = new_inp;
2692
2693         /* Copy the port across */
2694         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2695         rport = stcb->rport;
2696         /* Pull the tcb from the old association */
2697         LIST_REMOVE(stcb, sctp_tcbhash);
2698         LIST_REMOVE(stcb, sctp_tcblist);
2699         if (stcb->asoc.in_asocid_hash) {
2700                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2701         }
2702         /* Now insert the new_inp into the TCP connected hash */
2703         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2704
2705         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2706         /* Its safe to access */
2707         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2708
2709         /* Now move the tcb into the endpoint list */
2710         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2711         /*
2712          * Question, do we even need to worry about the ep-hash since we
2713          * only have one connection? Probably not :> so lets get rid of it
2714          * and not suck up any kernel memory in that.
2715          */
2716         if (stcb->asoc.in_asocid_hash) {
2717                 struct sctpasochead *lhd;
2718
2719                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2720                     new_inp->hashasocidmark)];
2721                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2722         }
2723         /* Ok. Let's restart timer. */
2724         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2725                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2726                     stcb, net);
2727         }
2728
2729         SCTP_INP_INFO_WUNLOCK();
2730         if (new_inp->sctp_tcbhash != NULL) {
2731                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2732                 new_inp->sctp_tcbhash = NULL;
2733         }
2734         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2735                 /* Subset bound, so copy in the laddr list from the old_inp */
2736                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2737                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2738                         if (laddr == NULL) {
2739                                 /*
2740                                  * Gak, what can we do? This assoc is really
2741                                  * HOSED. We probably should send an abort
2742                                  * here.
2743                                  */
2744                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2745                                 continue;
2746                         }
2747                         SCTP_INCR_LADDR_COUNT();
2748                         bzero(laddr, sizeof(*laddr));
2749                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2750                         laddr->ifa = oladdr->ifa;
2751                         atomic_add_int(&laddr->ifa->refcount, 1);
2752                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2753                             sctp_nxt_addr);
2754                         new_inp->laddr_count++;
2755                         if (oladdr == stcb->asoc.last_used_address) {
2756                                 stcb->asoc.last_used_address = laddr;
2757                         }
2758                 }
2759         }
2760         /*
2761          * Now any running timers need to be adjusted since we really don't
2762          * care if they are running or not just blast in the new_inp into
2763          * all of them.
2764          */
2765
2766         stcb->asoc.dack_timer.ep = (void *)new_inp;
2767         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2768         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2769         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2770         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2771         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2772         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2773         /* now what about the nets? */
2774         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2775                 net->pmtu_timer.ep = (void *)new_inp;
2776                 net->hb_timer.ep = (void *)new_inp;
2777                 net->rxt_timer.ep = (void *)new_inp;
2778         }
2779         SCTP_INP_WUNLOCK(new_inp);
2780         SCTP_INP_WUNLOCK(old_inp);
2781 }
2782
2783
2784
2785
2786 /* sctp_ifap is used to bypass normal local address validation checks */
2787 int
2788 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2789     struct sctp_ifa *sctp_ifap, struct thread *p)
2790 {
2791         /* bind a ep to a socket address */
2792         struct sctppcbhead *head;
2793         struct sctp_inpcb *inp, *inp_tmp;
2794         struct inpcb *ip_inp;
2795         int port_reuse_active = 0;
2796         int bindall;
2797         uint16_t lport;
2798         int error;
2799         uint32_t vrf_id;
2800
2801         lport = 0;
2802         error = 0;
2803         bindall = 1;
2804         inp = (struct sctp_inpcb *)so->so_pcb;
2805         ip_inp = (struct inpcb *)so->so_pcb;
2806 #ifdef SCTP_DEBUG
2807         if (addr) {
2808                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
2809                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2810                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
2811                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2812         }
2813 #endif
2814         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2815                 /* already did a bind, subsequent binds NOT allowed ! */
2816                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2817                 return (EINVAL);
2818         }
2819 #ifdef INVARIANTS
2820         if (p == NULL)
2821                 panic("null proc/thread");
2822 #endif
2823         if (addr != NULL) {
2824                 switch (addr->sa_family) {
2825 #ifdef INET
2826                 case AF_INET:
2827                         {
2828                                 struct sockaddr_in *sin;
2829
2830                                 /* IPV6_V6ONLY socket? */
2831                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2832                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2833                                         return (EINVAL);
2834                                 }
2835                                 if (addr->sa_len != sizeof(*sin)) {
2836                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2837                                         return (EINVAL);
2838                                 }
2839                                 sin = (struct sockaddr_in *)addr;
2840                                 lport = sin->sin_port;
2841                                 /*
2842                                  * For LOOPBACK the prison_local_ip4() call
2843                                  * will transmute the ip address to the
2844                                  * proper value.
2845                                  */
2846                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2847                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2848                                         return (error);
2849                                 }
2850                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2851                                         bindall = 0;
2852                                 }
2853                                 break;
2854                         }
2855 #endif
2856 #ifdef INET6
2857                 case AF_INET6:
2858                         {
2859                                 /*
2860                                  * Only for pure IPv6 Address. (No IPv4
2861                                  * Mapped!)
2862                                  */
2863                                 struct sockaddr_in6 *sin6;
2864
2865                                 sin6 = (struct sockaddr_in6 *)addr;
2866
2867                                 if (addr->sa_len != sizeof(*sin6)) {
2868                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2869                                         return (EINVAL);
2870                                 }
2871                                 lport = sin6->sin6_port;
2872
2873                                 /*
2874                                  * For LOOPBACK the prison_local_ip6() call
2875                                  * will transmute the ipv6 address to the
2876                                  * proper value.
2877                                  */
2878                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2879                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2880                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2881                                         return (error);
2882                                 }
2883                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2884                                         bindall = 0;
2885                                         /* KAME hack: embed scopeid */
2886                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2887                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2888                                                 return (EINVAL);
2889                                         }
2890                                 }
2891                                 /* this must be cleared for ifa_ifwithaddr() */
2892                                 sin6->sin6_scope_id = 0;
2893                                 break;
2894                         }
2895 #endif
2896                 default:
2897                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2898                         return (EAFNOSUPPORT);
2899                 }
2900         }
2901         SCTP_INP_INFO_WLOCK();
2902         SCTP_INP_WLOCK(inp);
2903         /* Setup a vrf_id to be the default for the non-bind-all case. */
2904         vrf_id = inp->def_vrf_id;
2905
2906         /* increase our count due to the unlock we do */
2907         SCTP_INP_INCR_REF(inp);
2908         if (lport) {
2909                 /*
2910                  * Did the caller specify a port? if so we must see if a ep
2911                  * already has this one bound.
2912                  */
2913                 /* got to be root to get at low ports */
2914                 if (ntohs(lport) < IPPORT_RESERVED) {
2915                         if (p && (error =
2916                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2917                             )) {
2918                                 SCTP_INP_DECR_REF(inp);
2919                                 SCTP_INP_WUNLOCK(inp);
2920                                 SCTP_INP_INFO_WUNLOCK();
2921                                 return (error);
2922                         }
2923                 }
2924                 if (p == NULL) {
2925                         SCTP_INP_DECR_REF(inp);
2926                         SCTP_INP_WUNLOCK(inp);
2927                         SCTP_INP_INFO_WUNLOCK();
2928                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2929                         return (error);
2930                 }
2931                 SCTP_INP_WUNLOCK(inp);
2932                 if (bindall) {
2933                         vrf_id = inp->def_vrf_id;
2934                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2935                         if (inp_tmp != NULL) {
2936                                 /*
2937                                  * lock guy returned and lower count note
2938                                  * that we are not bound so inp_tmp should
2939                                  * NEVER be inp. And it is this inp
2940                                  * (inp_tmp) that gets the reference bump,
2941                                  * so we must lower it.
2942                                  */
2943                                 SCTP_INP_DECR_REF(inp_tmp);
2944                                 /* unlock info */
2945                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2946                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2947                                         /*
2948                                          * Ok, must be one-2-one and
2949                                          * allowing port re-use
2950                                          */
2951                                         port_reuse_active = 1;
2952                                         goto continue_anyway;
2953                                 }
2954                                 SCTP_INP_DECR_REF(inp);
2955                                 SCTP_INP_INFO_WUNLOCK();
2956                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2957                                 return (EADDRINUSE);
2958                         }
2959                 } else {
2960                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2961                         if (inp_tmp != NULL) {
2962                                 /*
2963                                  * lock guy returned and lower count note
2964                                  * that we are not bound so inp_tmp should
2965                                  * NEVER be inp. And it is this inp
2966                                  * (inp_tmp) that gets the reference bump,
2967                                  * so we must lower it.
2968                                  */
2969                                 SCTP_INP_DECR_REF(inp_tmp);
2970                                 /* unlock info */
2971                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2972                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2973                                         /*
2974                                          * Ok, must be one-2-one and
2975                                          * allowing port re-use
2976                                          */
2977                                         port_reuse_active = 1;
2978                                         goto continue_anyway;
2979                                 }
2980                                 SCTP_INP_DECR_REF(inp);
2981                                 SCTP_INP_INFO_WUNLOCK();
2982                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2983                                 return (EADDRINUSE);
2984                         }
2985                 }
2986 continue_anyway:
2987                 SCTP_INP_WLOCK(inp);
2988                 if (bindall) {
2989                         /* verify that no lport is not used by a singleton */
2990                         if ((port_reuse_active == 0) &&
2991                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))
2992                             ) {
2993                                 /* Sorry someone already has this one bound */
2994                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2995                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2996                                         port_reuse_active = 1;
2997                                 } else {
2998                                         SCTP_INP_DECR_REF(inp);
2999                                         SCTP_INP_WUNLOCK(inp);
3000                                         SCTP_INP_INFO_WUNLOCK();
3001                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3002                                         return (EADDRINUSE);
3003                                 }
3004                         }
3005                 }
3006         } else {
3007                 uint16_t first, last, candidate;
3008                 uint16_t count;
3009                 int done;
3010
3011                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3012                         first = MODULE_GLOBAL(ipport_hifirstauto);
3013                         last = MODULE_GLOBAL(ipport_hilastauto);
3014                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3015                         if (p && (error =
3016                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3017                             )) {
3018                                 SCTP_INP_DECR_REF(inp);
3019                                 SCTP_INP_WUNLOCK(inp);
3020                                 SCTP_INP_INFO_WUNLOCK();
3021                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3022                                 return (error);
3023                         }
3024                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3025                         last = MODULE_GLOBAL(ipport_lowlastauto);
3026                 } else {
3027                         first = MODULE_GLOBAL(ipport_firstauto);
3028                         last = MODULE_GLOBAL(ipport_lastauto);
3029                 }
3030                 if (first > last) {
3031                         uint16_t temp;
3032
3033                         temp = first;
3034                         first = last;
3035                         last = temp;
3036                 }
3037                 count = last - first + 1;       /* number of candidates */
3038                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3039
3040                 done = 0;
3041                 while (!done) {
3042                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3043                                 done = 1;
3044                         }
3045                         if (!done) {
3046                                 if (--count == 0) {
3047                                         SCTP_INP_DECR_REF(inp);
3048                                         SCTP_INP_WUNLOCK(inp);
3049                                         SCTP_INP_INFO_WUNLOCK();
3050                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3051                                         return (EADDRINUSE);
3052                                 }
3053                                 if (candidate == last)
3054                                         candidate = first;
3055                                 else
3056                                         candidate = candidate + 1;
3057                         }
3058                 }
3059                 lport = htons(candidate);
3060         }
3061         SCTP_INP_DECR_REF(inp);
3062         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3063             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3064                 /*
3065                  * this really should not happen. The guy did a non-blocking
3066                  * bind and then did a close at the same time.
3067                  */
3068                 SCTP_INP_WUNLOCK(inp);
3069                 SCTP_INP_INFO_WUNLOCK();
3070                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3071                 return (EINVAL);
3072         }
3073         /* ok we look clear to give out this port, so lets setup the binding */
3074         if (bindall) {
3075                 /* binding to all addresses, so just set in the proper flags */
3076                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3077                 /* set the automatic addr changes from kernel flag */
3078                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3079                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3080                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3081                 } else {
3082                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3083                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3084                 }
3085                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3086                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3087                 } else {
3088                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3089                 }
3090                 /*
3091                  * set the automatic mobility_base from kernel flag (by
3092                  * micchie)
3093                  */
3094                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3095                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3096                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3097                 } else {
3098                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3099                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3100                 }
3101                 /*
3102                  * set the automatic mobility_fasthandoff from kernel flag
3103                  * (by micchie)
3104                  */
3105                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3106                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3107                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3108                 } else {
3109                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3110                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3111                 }
3112         } else {
3113                 /*
3114                  * bind specific, make sure flags is off and add a new
3115                  * address structure to the sctp_addr_list inside the ep
3116                  * structure.
3117                  *
3118                  * We will need to allocate one and insert it at the head. The
3119                  * socketopt call can just insert new addresses in there as
3120                  * well. It will also have to do the embed scope kame hack
3121                  * too (before adding).
3122                  */
3123                 struct sctp_ifa *ifa;
3124                 struct sockaddr_storage store_sa;
3125
3126                 memset(&store_sa, 0, sizeof(store_sa));
3127                 switch (addr->sa_family) {
3128 #ifdef INET
3129                 case AF_INET:
3130                         {
3131                                 struct sockaddr_in *sin;
3132
3133                                 sin = (struct sockaddr_in *)&store_sa;
3134                                 memcpy(sin, addr, sizeof(struct sockaddr_in));
3135                                 sin->sin_port = 0;
3136                                 break;
3137                         }
3138 #endif
3139 #ifdef INET6
3140                 case AF_INET6:
3141                         {
3142                                 struct sockaddr_in6 *sin6;
3143
3144                                 sin6 = (struct sockaddr_in6 *)&store_sa;
3145                                 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3146                                 sin6->sin6_port = 0;
3147                                 break;
3148                         }
3149 #endif
3150                 default:
3151                         break;
3152                 }
3153                 /*
3154                  * first find the interface with the bound address need to
3155                  * zero out the port to find the address! yuck! can't do
3156                  * this earlier since need port for sctp_pcb_findep()
3157                  */
3158                 if (sctp_ifap != NULL)
3159                         ifa = sctp_ifap;
3160                 else {
3161                         /*
3162                          * Note for BSD we hit here always other O/S's will
3163                          * pass things in via the sctp_ifap argument
3164                          * (Panda).
3165                          */
3166                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3167                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3168                 }
3169                 if (ifa == NULL) {
3170                         /* Can't find an interface with that address */
3171                         SCTP_INP_WUNLOCK(inp);
3172                         SCTP_INP_INFO_WUNLOCK();
3173                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3174                         return (EADDRNOTAVAIL);
3175                 }
3176 #ifdef INET6
3177                 if (addr->sa_family == AF_INET6) {
3178                         /* GAK, more FIXME IFA lock? */
3179                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3180                                 /* Can't bind a non-existent addr. */
3181                                 SCTP_INP_WUNLOCK(inp);
3182                                 SCTP_INP_INFO_WUNLOCK();
3183                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3184                                 return (EINVAL);
3185                         }
3186                 }
3187 #endif
3188                 /* we're not bound all */
3189                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3190                 /* allow bindx() to send ASCONF's for binding changes */
3191                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3192                 /* clear automatic addr changes from kernel flag */
3193                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3194
3195                 /* add this address to the endpoint list */
3196                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3197                 if (error != 0) {
3198                         SCTP_INP_WUNLOCK(inp);
3199                         SCTP_INP_INFO_WUNLOCK();
3200                         return (error);
3201                 }
3202                 inp->laddr_count++;
3203         }
3204         /* find the bucket */
3205         if (port_reuse_active) {
3206                 /* Put it into tcp 1-2-1 hash */
3207                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3208                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3209         } else {
3210                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3211         }
3212         /* put it in the bucket */
3213         LIST_INSERT_HEAD(head, inp, sctp_hash);
3214         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3215             head, ntohs(lport), port_reuse_active);
3216         /* set in the port */
3217         inp->sctp_lport = lport;
3218
3219         /* turn off just the unbound flag */
3220         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3221         SCTP_INP_WUNLOCK(inp);
3222         SCTP_INP_INFO_WUNLOCK();
3223         return (0);
3224 }
3225
3226
3227 static void
3228 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3229 {
3230         struct sctp_iterator *it, *nit;
3231
3232         /*
3233          * We enter with the only the ITERATOR_LOCK in place and a write
3234          * lock on the inp_info stuff.
3235          */
3236         it = sctp_it_ctl.cur_it;
3237         if (it && (it->vn != curvnet)) {
3238                 /* Its not looking at our VNET */
3239                 return;
3240         }
3241         if (it && (it->inp == inp)) {
3242                 /*
3243                  * This is tricky and we hold the iterator lock, but when it
3244                  * returns and gets the lock (when we release it) the
3245                  * iterator will try to operate on inp. We need to stop that
3246                  * from happening. But of course the iterator has a
3247                  * reference on the stcb and inp. We can mark it and it will
3248                  * stop.
3249                  *
3250                  * If its a single iterator situation, we set the end iterator
3251                  * flag. Otherwise we set the iterator to go to the next
3252                  * inp.
3253                  *
3254                  */
3255                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3256                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3257                 } else {
3258                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3259                 }
3260         }
3261         /*
3262          * Now go through and remove any single reference to our inp that
3263          * may be still pending on the list
3264          */
3265         SCTP_IPI_ITERATOR_WQ_LOCK();
3266         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3267                 if (it->vn != curvnet) {
3268                         continue;
3269                 }
3270                 if (it->inp == inp) {
3271                         /* This one points to me is it inp specific? */
3272                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3273                                 /* Remove and free this one */
3274                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3275                                     it, sctp_nxt_itr);
3276                                 if (it->function_atend != NULL) {
3277                                         (*it->function_atend) (it->pointer, it->val);
3278                                 }
3279                                 SCTP_FREE(it, SCTP_M_ITER);
3280                         } else {
3281                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3282                                 if (it->inp) {
3283                                         SCTP_INP_INCR_REF(it->inp);
3284                                 }
3285                         }
3286                         /*
3287                          * When its put in the refcnt is incremented so decr
3288                          * it
3289                          */
3290                         SCTP_INP_DECR_REF(inp);
3291                 }
3292         }
3293         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3294 }
3295
3296 /* release sctp_inpcb unbind the port */
3297 void
3298 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3299 {
3300         /*
3301          * Here we free a endpoint. We must find it (if it is in the Hash
3302          * table) and remove it from there. Then we must also find it in the
3303          * overall list and remove it from there. After all removals are
3304          * complete then any timer has to be stopped. Then start the actual
3305          * freeing. a) Any local lists. b) Any associations. c) The hash of
3306          * all associations. d) finally the ep itself.
3307          */
3308         struct sctp_tcb *asoc, *nasoc;
3309         struct sctp_laddr *laddr, *nladdr;
3310         struct inpcb *ip_pcb;
3311         struct socket *so;
3312         int being_refed = 0;
3313         struct sctp_queued_to_read *sq, *nsq;
3314         int cnt;
3315         sctp_sharedkey_t *shared_key, *nshared_key;
3316
3317
3318 #ifdef SCTP_LOG_CLOSING
3319         sctp_log_closing(inp, NULL, 0);
3320 #endif
3321         SCTP_ITERATOR_LOCK();
3322         /* mark any iterators on the list or being processed */
3323         sctp_iterator_inp_being_freed(inp);
3324         SCTP_ITERATOR_UNLOCK();
3325         so = inp->sctp_socket;
3326         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3327                 /* been here before.. eeks.. get out of here */
3328                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3329 #ifdef SCTP_LOG_CLOSING
3330                 sctp_log_closing(inp, NULL, 1);
3331 #endif
3332                 return;
3333         }
3334         SCTP_ASOC_CREATE_LOCK(inp);
3335         SCTP_INP_INFO_WLOCK();
3336
3337         SCTP_INP_WLOCK(inp);
3338         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3339                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3340                 /* socket is gone, so no more wakeups allowed */
3341                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3342                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3343                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3344
3345         }
3346         /* First time through we have the socket lock, after that no more. */
3347         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3348             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3349
3350         if (inp->control) {
3351                 sctp_m_freem(inp->control);
3352                 inp->control = NULL;
3353         }
3354         if (inp->pkt) {
3355                 sctp_m_freem(inp->pkt);
3356                 inp->pkt = NULL;
3357         }
3358         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3359                                          * here but I will be nice :> (i.e.
3360                                          * ip_pcb = ep;) */
3361         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3362                 int cnt_in_sd;
3363
3364                 cnt_in_sd = 0;
3365                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3366                         SCTP_TCB_LOCK(asoc);
3367                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3368                                 /* Skip guys being freed */
3369                                 cnt_in_sd++;
3370                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3371                                         /*
3372                                          * Special case - we did not start a
3373                                          * kill timer on the asoc due to it
3374                                          * was not closed. So go ahead and
3375                                          * start it now.
3376                                          */
3377                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3378                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3379                                 }
3380                                 SCTP_TCB_UNLOCK(asoc);
3381                                 continue;
3382                         }
3383                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3384                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3385                             (asoc->asoc.total_output_queue_size == 0)) {
3386                                 /*
3387                                  * If we have data in queue, we don't want
3388                                  * to just free since the app may have done,
3389                                  * send()/close or connect/send/close. And
3390                                  * it wants the data to get across first.
3391                                  */
3392                                 /* Just abandon things in the front states */
3393                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3394                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3395                                         cnt_in_sd++;
3396                                 }
3397                                 continue;
3398                         }
3399                         /* Disconnect the socket please */
3400                         asoc->sctp_socket = NULL;
3401                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3402                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3403                             (asoc->asoc.control_pdapi) ||
3404                             (asoc->asoc.size_on_all_streams > 0) ||
3405                             (so && (so->so_rcv.sb_cc > 0))) {
3406                                 /* Left with Data unread */
3407                                 struct mbuf *op_err;
3408
3409                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3410                                     0, M_DONTWAIT, 1, MT_DATA);
3411                                 if (op_err) {
3412                                         /* Fill in the user initiated abort */
3413                                         struct sctp_paramhdr *ph;
3414                                         uint32_t *ippp;
3415
3416                                         SCTP_BUF_LEN(op_err) =
3417                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
3418                                         ph = mtod(op_err,
3419                                             struct sctp_paramhdr *);
3420                                         ph->param_type = htons(
3421                                             SCTP_CAUSE_USER_INITIATED_ABT);
3422                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
3423                                         ippp = (uint32_t *) (ph + 1);
3424                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
3425                                 }
3426                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3427                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3428                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3429                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3430                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3431                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3432                                 }
3433                                 if (sctp_free_assoc(inp, asoc,
3434                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3435                                         cnt_in_sd++;
3436                                 }
3437                                 continue;
3438                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3439                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3440                                     (asoc->asoc.stream_queue_cnt == 0)
3441                             ) {
3442                                 if (asoc->asoc.locked_on_sending) {
3443                                         goto abort_anyway;
3444                                 }
3445                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3446                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3447                                         struct sctp_nets *netp;
3448
3449                                         if (asoc->asoc.alternate) {
3450                                                 netp = asoc->asoc.alternate;
3451                                         } else {
3452                                                 netp = asoc->asoc.primary_destination;
3453                                         }
3454                                         /*
3455                                          * there is nothing queued to send,
3456                                          * so I send shutdown
3457                                          */
3458                                         sctp_send_shutdown(asoc, netp);
3459                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3460                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3461                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3462                                         }
3463                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3464                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3465                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3466                                             netp);
3467                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3468                                             asoc->asoc.primary_destination);
3469                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3470                                 }
3471                         } else {
3472                                 /* mark into shutdown pending */
3473                                 struct sctp_stream_queue_pending *sp;
3474
3475                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3476                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3477                                     asoc->asoc.primary_destination);
3478                                 if (asoc->asoc.locked_on_sending) {
3479                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3480                                             sctp_streamhead);
3481                                         if (sp == NULL) {
3482                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3483                                                     asoc->asoc.locked_on_sending,
3484                                                     asoc->asoc.locked_on_sending->stream_no);
3485                                         } else {
3486                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3487                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3488                                         }
3489                                 }
3490                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3491                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3492                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3493                                         struct mbuf *op_err;
3494
3495                         abort_anyway:
3496                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3497                                             0, M_DONTWAIT, 1, MT_DATA);
3498                                         if (op_err) {
3499                                                 /*
3500                                                  * Fill in the user
3501                                                  * initiated abort
3502                                                  */
3503                                                 struct sctp_paramhdr *ph;
3504                                                 uint32_t *ippp;
3505
3506                                                 SCTP_BUF_LEN(op_err) =
3507                                                     (sizeof(struct sctp_paramhdr) +
3508                                                     sizeof(uint32_t));
3509                                                 ph = mtod(op_err,
3510                                                     struct sctp_paramhdr *);
3511                                                 ph->param_type = htons(
3512                                                     SCTP_CAUSE_USER_INITIATED_ABT);
3513                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3514                                                 ippp = (uint32_t *) (ph + 1);
3515                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
3516                                         }
3517                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3518                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3519                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3520                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3521                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3522                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3523                                         }
3524                                         if (sctp_free_assoc(inp, asoc,
3525                                             SCTP_PCBFREE_NOFORCE,
3526                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3527                                                 cnt_in_sd++;
3528                                         }
3529                                         continue;
3530                                 } else {
3531                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3532                                 }
3533                         }
3534                         cnt_in_sd++;
3535                         SCTP_TCB_UNLOCK(asoc);
3536                 }
3537                 /* now is there some left in our SHUTDOWN state? */
3538                 if (cnt_in_sd) {
3539 #ifdef SCTP_LOG_CLOSING
3540                         sctp_log_closing(inp, NULL, 2);
3541 #endif
3542                         inp->sctp_socket = NULL;
3543                         SCTP_INP_WUNLOCK(inp);
3544                         SCTP_ASOC_CREATE_UNLOCK(inp);
3545                         SCTP_INP_INFO_WUNLOCK();
3546                         return;
3547                 }
3548         }
3549         inp->sctp_socket = NULL;
3550         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3551             SCTP_PCB_FLAGS_UNBOUND) {
3552                 /*
3553                  * ok, this guy has been bound. It's port is somewhere in
3554                  * the SCTP_BASE_INFO(hash table). Remove it!
3555                  */
3556                 LIST_REMOVE(inp, sctp_hash);
3557                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3558         }
3559         /*
3560          * If there is a timer running to kill us, forget it, since it may
3561          * have a contest on the INP lock.. which would cause us to die ...
3562          */
3563         cnt = 0;
3564         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3565                 SCTP_TCB_LOCK(asoc);
3566                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3567                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3568                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3569                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3570                         }
3571                         cnt++;
3572                         SCTP_TCB_UNLOCK(asoc);
3573                         continue;
3574                 }
3575                 /* Free associations that are NOT killing us */
3576                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3577                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3578                         struct mbuf *op_err;
3579                         uint32_t *ippp;
3580
3581                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3582                             0, M_DONTWAIT, 1, MT_DATA);
3583                         if (op_err) {
3584                                 /* Fill in the user initiated abort */
3585                                 struct sctp_paramhdr *ph;
3586
3587                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
3588                                     sizeof(uint32_t));
3589                                 ph = mtod(op_err, struct sctp_paramhdr *);
3590                                 ph->param_type = htons(
3591                                     SCTP_CAUSE_USER_INITIATED_ABT);
3592                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3593                                 ippp = (uint32_t *) (ph + 1);
3594                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
3595
3596                         }
3597                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3598                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3599                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3600                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3601                         cnt++;
3602                         SCTP_TCB_UNLOCK(asoc);
3603                         continue;
3604                 }
3605                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3606                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3607                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3608                 }
3609                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3610                         cnt++;
3611                 }
3612         }
3613         if (cnt) {
3614                 /* Ok we have someone out there that will kill us */
3615                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3616 #ifdef SCTP_LOG_CLOSING
3617                 sctp_log_closing(inp, NULL, 3);
3618 #endif
3619                 SCTP_INP_WUNLOCK(inp);
3620                 SCTP_ASOC_CREATE_UNLOCK(inp);
3621                 SCTP_INP_INFO_WUNLOCK();
3622                 return;
3623         }
3624         if (SCTP_INP_LOCK_CONTENDED(inp))
3625                 being_refed++;
3626         if (SCTP_INP_READ_CONTENDED(inp))
3627                 being_refed++;
3628         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3629                 being_refed++;
3630
3631         if ((inp->refcount) ||
3632             (being_refed) ||
3633             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3634                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3635 #ifdef SCTP_LOG_CLOSING
3636                 sctp_log_closing(inp, NULL, 4);
3637 #endif
3638                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3639                 SCTP_INP_WUNLOCK(inp);
3640                 SCTP_ASOC_CREATE_UNLOCK(inp);
3641                 SCTP_INP_INFO_WUNLOCK();
3642                 return;
3643         }
3644         inp->sctp_ep.signature_change.type = 0;
3645         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3646         /*
3647          * Remove it from the list .. last thing we need a lock for.
3648          */
3649         LIST_REMOVE(inp, sctp_list);
3650         SCTP_INP_WUNLOCK(inp);
3651         SCTP_ASOC_CREATE_UNLOCK(inp);
3652         SCTP_INP_INFO_WUNLOCK();
3653         /*
3654          * Now we release all locks. Since this INP cannot be found anymore
3655          * except possibly by the kill timer that might be running. We call
3656          * the drain function here. It should hit the case were it sees the
3657          * ACTIVE flag cleared and exit out freeing us to proceed and
3658          * destroy everything.
3659          */
3660         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3661                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3662         } else {
3663                 /* Probably un-needed */
3664                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3665         }
3666
3667 #ifdef SCTP_LOG_CLOSING
3668         sctp_log_closing(inp, NULL, 5);
3669 #endif
3670
3671
3672         if ((inp->sctp_asocidhash) != NULL) {
3673                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3674                 inp->sctp_asocidhash = NULL;
3675         }
3676         /* sa_ignore FREED_MEMORY */
3677         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3678                 /* Its only abandoned if it had data left */
3679                 if (sq->length)
3680                         SCTP_STAT_INCR(sctps_left_abandon);
3681
3682                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3683                 sctp_free_remote_addr(sq->whoFrom);
3684                 if (so)
3685                         so->so_rcv.sb_cc -= sq->length;
3686                 if (sq->data) {
3687                         sctp_m_freem(sq->data);
3688                         sq->data = NULL;
3689                 }
3690                 /*
3691                  * no need to free the net count, since at this point all
3692                  * assoc's are gone.
3693                  */
3694                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3695                 SCTP_DECR_READQ_COUNT();
3696         }
3697         /* Now the sctp_pcb things */
3698         /*
3699          * free each asoc if it is not already closed/free. we can't use the
3700          * macro here since le_next will get freed as part of the
3701          * sctp_free_assoc() call.
3702          */
3703         if (so) {
3704 #ifdef IPSEC
3705                 ipsec_delete_pcbpolicy(ip_pcb);
3706 #endif                          /* IPSEC */
3707
3708                 /* Unlocks not needed since the socket is gone now */
3709         }
3710         if (ip_pcb->inp_options) {
3711                 (void)sctp_m_free(ip_pcb->inp_options);
3712                 ip_pcb->inp_options = 0;
3713         }
3714 #ifdef INET6
3715         if (ip_pcb->inp_vflag & INP_IPV6) {
3716                 struct in6pcb *in6p;
3717
3718                 in6p = (struct in6pcb *)inp;
3719                 ip6_freepcbopts(in6p->in6p_outputopts);
3720         }
3721 #endif                          /* INET6 */
3722         ip_pcb->inp_vflag = 0;
3723         /* free up authentication fields */
3724         if (inp->sctp_ep.local_auth_chunks != NULL)
3725                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3726         if (inp->sctp_ep.local_hmacs != NULL)
3727                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3728
3729         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3730                 LIST_REMOVE(shared_key, next);
3731                 sctp_free_sharedkey(shared_key);
3732                 /* sa_ignore FREED_MEMORY */
3733         }
3734
3735         /*
3736          * if we have an address list the following will free the list of
3737          * ifaddr's that are set into this ep. Again macro limitations here,
3738          * since the LIST_FOREACH could be a bad idea.
3739          */
3740         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3741                 sctp_remove_laddr(laddr);
3742         }
3743
3744 #ifdef SCTP_TRACK_FREED_ASOCS
3745         /* TEMP CODE */
3746         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3747                 LIST_REMOVE(asoc, sctp_tcblist);
3748                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3749                 SCTP_DECR_ASOC_COUNT();
3750         }
3751         /* *** END TEMP CODE *** */
3752 #endif
3753         /* Now lets see about freeing the EP hash table. */
3754         if (inp->sctp_tcbhash != NULL) {
3755                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3756                 inp->sctp_tcbhash = NULL;
3757         }
3758         /* Now we must put the ep memory back into the zone pool */
3759         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3760         SCTP_INP_LOCK_DESTROY(inp);
3761         SCTP_INP_READ_DESTROY(inp);
3762         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3763         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3764         SCTP_DECR_EP_COUNT();
3765 }
3766
3767
3768 struct sctp_nets *
3769 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3770 {
3771         struct sctp_nets *net;
3772
3773         /* locate the address */
3774         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3775                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3776                         return (net);
3777         }
3778         return (NULL);
3779 }
3780
3781
3782 int
3783 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3784 {
3785         struct sctp_ifa *sctp_ifa;
3786
3787         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3788         if (sctp_ifa) {
3789                 return (1);
3790         } else {
3791                 return (0);
3792         }
3793 }
3794
3795 /*
3796  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3797  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3798  * stats of stuff.
3799  */
3800 int
3801 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3802     struct sctp_nets **netp, int set_scope, int from)
3803 {
3804         /*
3805          * The following is redundant to the same lines in the
3806          * sctp_aloc_assoc() but is needed since others call the add address
3807          * function
3808          */
3809         struct sctp_nets *net, *netfirst;
3810         int addr_inscope;
3811
3812         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3813             from);
3814         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3815
3816         netfirst = sctp_findnet(stcb, newaddr);
3817         if (netfirst) {
3818                 /*
3819                  * Lie and return ok, we don't want to make the association
3820                  * go away for this behavior. It will happen in the TCP
3821                  * model in a connected socket. It does not reach the hash
3822                  * table until after the association is built so it can't be
3823                  * found. Mark as reachable, since the initial creation will
3824                  * have been cleared and the NOT_IN_ASSOC flag will have
3825                  * been added... and we don't want to end up removing it
3826                  * back out.
3827                  */
3828                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3829                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3830                             SCTP_ADDR_UNCONFIRMED);
3831                 } else {
3832                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3833                 }
3834
3835                 return (0);
3836         }
3837         addr_inscope = 1;
3838         switch (newaddr->sa_family) {
3839 #ifdef INET
3840         case AF_INET:
3841                 {
3842                         struct sockaddr_in *sin;
3843
3844                         sin = (struct sockaddr_in *)newaddr;
3845                         if (sin->sin_addr.s_addr == 0) {
3846                                 /* Invalid address */
3847                                 return (-1);
3848                         }
3849                         /* zero out the bzero area */
3850                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3851
3852                         /* assure len is set */
3853                         sin->sin_len = sizeof(struct sockaddr_in);
3854                         if (set_scope) {
3855 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3856                                 stcb->ipv4_local_scope = 1;
3857 #else
3858                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3859                                         stcb->asoc.ipv4_local_scope = 1;
3860                                 }
3861 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3862                         } else {
3863                                 /* Validate the address is in scope */
3864                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3865                                     (stcb->asoc.ipv4_local_scope == 0)) {
3866                                         addr_inscope = 0;
3867                                 }
3868                         }
3869                         break;
3870                 }
3871 #endif
3872 #ifdef INET6
3873         case AF_INET6:
3874                 {
3875                         struct sockaddr_in6 *sin6;
3876
3877                         sin6 = (struct sockaddr_in6 *)newaddr;
3878                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3879                                 /* Invalid address */
3880                                 return (-1);
3881                         }
3882                         /* assure len is set */
3883                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3884                         if (set_scope) {
3885                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3886                                         stcb->asoc.loopback_scope = 1;
3887                                         stcb->asoc.local_scope = 0;
3888                                         stcb->asoc.ipv4_local_scope = 1;
3889                                         stcb->asoc.site_scope = 1;
3890                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3891                                         /*
3892                                          * If the new destination is a
3893                                          * LINK_LOCAL we must have common
3894                                          * site scope. Don't set the local
3895                                          * scope since we may not share all
3896                                          * links, only loopback can do this.
3897                                          * Links on the local network would
3898                                          * also be on our private network
3899                                          * for v4 too.
3900                                          */
3901                                         stcb->asoc.ipv4_local_scope = 1;
3902                                         stcb->asoc.site_scope = 1;
3903                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3904                                         /*
3905                                          * If the new destination is
3906                                          * SITE_LOCAL then we must have site
3907                                          * scope in common.
3908                                          */
3909                                         stcb->asoc.site_scope = 1;
3910                                 }
3911                         } else {
3912                                 /* Validate the address is in scope */
3913                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3914                                     (stcb->asoc.loopback_scope == 0)) {
3915                                         addr_inscope = 0;
3916                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3917                                     (stcb->asoc.local_scope == 0)) {
3918                                         addr_inscope = 0;
3919                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3920                                     (stcb->asoc.site_scope == 0)) {
3921                                         addr_inscope = 0;
3922                                 }
3923                         }
3924                         break;
3925                 }
3926 #endif
3927         default:
3928                 /* not supported family type */
3929                 return (-1);
3930         }
3931         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3932         if (net == NULL) {
3933                 return (-1);
3934         }
3935         SCTP_INCR_RADDR_COUNT();
3936         bzero(net, sizeof(struct sctp_nets));
3937         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3938         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3939         switch (newaddr->sa_family) {
3940 #ifdef INET
3941         case AF_INET:
3942                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3943                 break;
3944 #endif
3945 #ifdef INET6
3946         case AF_INET6:
3947                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3948                 break;
3949 #endif
3950         default:
3951                 break;
3952         }
3953         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3954         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3955                 stcb->asoc.loopback_scope = 1;
3956                 stcb->asoc.ipv4_local_scope = 1;
3957                 stcb->asoc.local_scope = 0;
3958                 stcb->asoc.site_scope = 1;
3959                 addr_inscope = 1;
3960         }
3961         net->failure_threshold = stcb->asoc.def_net_failure;
3962         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3963         if (addr_inscope == 0) {
3964                 net->dest_state = (SCTP_ADDR_REACHABLE |
3965                     SCTP_ADDR_OUT_OF_SCOPE);
3966         } else {
3967                 if (from == SCTP_ADDR_IS_CONFIRMED)
3968                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3969                         net->dest_state = SCTP_ADDR_REACHABLE;
3970                 else
3971                         net->dest_state = SCTP_ADDR_REACHABLE |
3972                             SCTP_ADDR_UNCONFIRMED;
3973         }
3974         /*
3975          * We set this to 0, the timer code knows that this means its an
3976          * initial value
3977          */
3978         net->rto_needed = 1;
3979         net->RTO = 0;
3980         net->RTO_measured = 0;
3981         stcb->asoc.numnets++;
3982         net->ref_count = 1;
3983         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3984         net->port = stcb->asoc.port;
3985         net->dscp = stcb->asoc.default_dscp;
3986 #ifdef INET6
3987         net->flowlabel = stcb->asoc.default_flowlabel;
3988 #endif
3989         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3990                 net->dest_state |= SCTP_ADDR_NOHB;
3991         } else {
3992                 net->dest_state &= ~SCTP_ADDR_NOHB;
3993         }
3994         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3995                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3996         } else {
3997                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3998         }
3999         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
4000         /* Init the timer structure */
4001         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
4002         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
4003         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
4004
4005         /* Now generate a route for this guy */
4006 #ifdef INET6
4007         /* KAME hack: embed scopeid */
4008         if (newaddr->sa_family == AF_INET6) {
4009                 struct sockaddr_in6 *sin6;
4010
4011                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4012                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
4013                 sin6->sin6_scope_id = 0;
4014         }
4015 #endif
4016         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
4017
4018         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
4019                 /* Get source address */
4020                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
4021                     stcb,
4022                     (sctp_route_t *) & net->ro,
4023                     net,
4024                     0,
4025                     stcb->asoc.vrf_id);
4026                 /* Now get the interface MTU */
4027                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
4028                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
4029                 }
4030                 if (net->mtu > 0) {
4031                         uint32_t rmtu;
4032
4033                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
4034                         if (rmtu == 0) {
4035                                 /*
4036                                  * Start things off to match mtu of
4037                                  * interface please.
4038                                  */
4039                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
4040                                     net->ro.ro_rt, net->mtu);
4041                         } else {
4042                                 /*
4043                                  * we take the route mtu over the interface,
4044                                  * since the route may be leading out the
4045                                  * loopback, or a different interface.
4046                                  */
4047                                 net->mtu = rmtu;
4048                         }
4049                 }
4050         }
4051         if (net->mtu == 0) {
4052                 switch (newaddr->sa_family) {
4053 #ifdef INET
4054                 case AF_INET:
4055                         net->mtu = SCTP_DEFAULT_MTU;
4056                         break;
4057 #endif
4058 #ifdef INET6
4059                 case AF_INET6:
4060                         net->mtu = 1280;
4061                         break;
4062 #endif
4063                 default:
4064                         break;
4065                 }
4066         }
4067         if (net->port) {
4068                 net->mtu -= (uint32_t) sizeof(struct udphdr);
4069         }
4070         if (from == SCTP_ALLOC_ASOC) {
4071                 stcb->asoc.smallest_mtu = net->mtu;
4072         }
4073         if (stcb->asoc.smallest_mtu > net->mtu) {
4074                 stcb->asoc.smallest_mtu = net->mtu;
4075         }
4076 #ifdef INET6
4077         if (newaddr->sa_family == AF_INET6) {
4078                 struct sockaddr_in6 *sin6;
4079
4080                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4081                 (void)sa6_recoverscope(sin6);
4082         }
4083 #endif
4084
4085         /* JRS - Use the congestion control given in the CC module */
4086         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4087                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4088
4089         /*
4090          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4091          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4092          */
4093         net->find_pseudo_cumack = 1;
4094         net->find_rtx_pseudo_cumack = 1;
4095         net->src_addr_selected = 0;
4096         /* Choose an initial flowid. */
4097         net->flowid = stcb->asoc.my_vtag ^
4098             ntohs(stcb->rport) ^
4099             ntohs(stcb->sctp_ep->sctp_lport);
4100 #ifdef INVARIANTS
4101         net->flowidset = 1;
4102 #endif
4103         if (netp) {
4104                 *netp = net;
4105         }
4106         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4107         if (net->ro.ro_rt == NULL) {
4108                 /* Since we have no route put it at the back */
4109                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4110         } else if (netfirst == NULL) {
4111                 /* We are the first one in the pool. */
4112                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4113         } else if (netfirst->ro.ro_rt == NULL) {
4114                 /*
4115                  * First one has NO route. Place this one ahead of the first
4116                  * one.
4117                  */
4118                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4119         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4120                 /*
4121                  * This one has a different interface than the one at the
4122                  * top of the list. Place it ahead.
4123                  */
4124                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4125         } else {
4126                 /*
4127                  * Ok we have the same interface as the first one. Move
4128                  * forward until we find either a) one with a NULL route...
4129                  * insert ahead of that b) one with a different ifp.. insert
4130                  * after that. c) end of the list.. insert at the tail.
4131                  */
4132                 struct sctp_nets *netlook;
4133
4134                 do {
4135                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4136                         if (netlook == NULL) {
4137                                 /* End of the list */
4138                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4139                                 break;
4140                         } else if (netlook->ro.ro_rt == NULL) {
4141                                 /* next one has NO route */
4142                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4143                                 break;
4144                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4145                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4146                                     net, sctp_next);
4147                                 break;
4148                         }
4149                         /* Shift forward */
4150                         netfirst = netlook;
4151                 } while (netlook != NULL);
4152         }
4153
4154         /* got to have a primary set */
4155         if (stcb->asoc.primary_destination == 0) {
4156                 stcb->asoc.primary_destination = net;
4157         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4158                     (net->ro.ro_rt) &&
4159             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4160                 /* No route to current primary adopt new primary */
4161                 stcb->asoc.primary_destination = net;
4162         }
4163         /* Validate primary is first */
4164         net = TAILQ_FIRST(&stcb->asoc.nets);
4165         if ((net != stcb->asoc.primary_destination) &&
4166             (stcb->asoc.primary_destination)) {
4167                 /*
4168                  * first one on the list is NOT the primary sctp_cmpaddr()
4169                  * is much more efficient if the primary is the first on the
4170                  * list, make it so.
4171                  */
4172                 TAILQ_REMOVE(&stcb->asoc.nets,
4173                     stcb->asoc.primary_destination, sctp_next);
4174                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4175                     stcb->asoc.primary_destination, sctp_next);
4176         }
4177         return (0);
4178 }
4179
4180
4181 static uint32_t
4182 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4183 {
4184         uint32_t id;
4185         struct sctpasochead *head;
4186         struct sctp_tcb *lstcb;
4187
4188         SCTP_INP_WLOCK(inp);
4189 try_again:
4190         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4191                 /* TSNH */
4192                 SCTP_INP_WUNLOCK(inp);
4193                 return (0);
4194         }
4195         /*
4196          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4197          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4198          */
4199         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4200                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4201         }
4202         id = inp->sctp_associd_counter;
4203         inp->sctp_associd_counter++;
4204         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4205         if (lstcb) {
4206                 goto try_again;
4207         }
4208         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4209         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4210         stcb->asoc.in_asocid_hash = 1;
4211         SCTP_INP_WUNLOCK(inp);
4212         return id;
4213 }
4214
4215 /*
4216  * allocate an association and add it to the endpoint. The caller must be
4217  * careful to add all additional addresses once they are know right away or
4218  * else the assoc will be may experience a blackout scenario.
4219  */
4220 struct sctp_tcb *
4221 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4222     int *error, uint32_t override_tag, uint32_t vrf_id,
4223     struct thread *p
4224 )
4225 {
4226         /* note the p argument is only valid in unbound sockets */
4227
4228         struct sctp_tcb *stcb;
4229         struct sctp_association *asoc;
4230         struct sctpasochead *head;
4231         uint16_t rport;
4232         int err;
4233
4234         /*
4235          * Assumption made here: Caller has done a
4236          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4237          * address does not exist already.
4238          */
4239         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4240                 /* Hit max assoc, sorry no more */
4241                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4242                 *error = ENOBUFS;
4243                 return (NULL);
4244         }
4245         if (firstaddr == NULL) {
4246                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4247                 *error = EINVAL;
4248                 return (NULL);
4249         }
4250         SCTP_INP_RLOCK(inp);
4251         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4252             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4253             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4254                 /*
4255                  * If its in the TCP pool, its NOT allowed to create an
4256                  * association. The parent listener needs to call
4257                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4258                  * off, or connected one does this.. its an error.
4259                  */
4260                 SCTP_INP_RUNLOCK(inp);
4261                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4262                 *error = EINVAL;
4263                 return (NULL);
4264         }
4265         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4266             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4267                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4268                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4269                         SCTP_INP_RUNLOCK(inp);
4270                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4271                         *error = EINVAL;
4272                         return (NULL);
4273                 }
4274         }
4275         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4276 #ifdef SCTP_DEBUG
4277         if (firstaddr) {
4278                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4279                 switch (firstaddr->sa_family) {
4280 #ifdef INET
4281                 case AF_INET:
4282                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4283                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4284                         break;
4285 #endif
4286 #ifdef INET6
4287                 case AF_INET6:
4288                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4289                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4290                         break;
4291 #endif
4292                 default:
4293                         break;
4294                 }
4295         } else {
4296                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4297         }
4298 #endif                          /* SCTP_DEBUG */
4299         switch (firstaddr->sa_family) {
4300 #ifdef INET
4301         case AF_INET:
4302                 {
4303                         struct sockaddr_in *sin;
4304
4305                         sin = (struct sockaddr_in *)firstaddr;
4306                         if ((ntohs(sin->sin_port) == 0) ||
4307                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4308                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4309                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4310                                 /* Invalid address */
4311                                 SCTP_INP_RUNLOCK(inp);
4312                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4313                                 *error = EINVAL;
4314                                 return (NULL);
4315                         }
4316                         rport = sin->sin_port;
4317                         break;
4318                 }
4319 #endif
4320 #ifdef INET6
4321         case AF_INET6:
4322                 {
4323                         struct sockaddr_in6 *sin6;
4324
4325                         sin6 = (struct sockaddr_in6 *)firstaddr;
4326                         if ((ntohs(sin6->sin6_port) == 0) ||
4327                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4328                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4329                                 /* Invalid address */
4330                                 SCTP_INP_RUNLOCK(inp);
4331                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4332                                 *error = EINVAL;
4333                                 return (NULL);
4334                         }
4335                         rport = sin6->sin6_port;
4336                         break;
4337                 }
4338 #endif
4339         default:
4340                 /* not supported family type */
4341                 SCTP_INP_RUNLOCK(inp);
4342                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4343                 *error = EINVAL;
4344                 return (NULL);
4345         }
4346         SCTP_INP_RUNLOCK(inp);
4347         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4348                 /*
4349                  * If you have not performed a bind, then we need to do the
4350                  * ephemeral bind for you.
4351                  */
4352                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4353                     (struct sockaddr *)NULL,
4354                     (struct sctp_ifa *)NULL,
4355                     p
4356                     ))) {
4357                         /* bind error, probably perm */
4358                         *error = err;
4359                         return (NULL);
4360                 }
4361         }
4362         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4363         if (stcb == NULL) {
4364                 /* out of memory? */
4365                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4366                 *error = ENOMEM;
4367                 return (NULL);
4368         }
4369         SCTP_INCR_ASOC_COUNT();
4370
4371         bzero(stcb, sizeof(*stcb));
4372         asoc = &stcb->asoc;
4373
4374         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4375         SCTP_TCB_LOCK_INIT(stcb);
4376         SCTP_TCB_SEND_LOCK_INIT(stcb);
4377         stcb->rport = rport;
4378         /* setup back pointer's */
4379         stcb->sctp_ep = inp;
4380         stcb->sctp_socket = inp->sctp_socket;
4381         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4382                 /* failed */
4383                 SCTP_TCB_LOCK_DESTROY(stcb);
4384                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4385                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4386                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4387                 SCTP_DECR_ASOC_COUNT();
4388                 *error = err;
4389                 return (NULL);
4390         }
4391         /* and the port */
4392         SCTP_INP_INFO_WLOCK();
4393         SCTP_INP_WLOCK(inp);
4394         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4395                 /* inpcb freed while alloc going on */
4396                 SCTP_TCB_LOCK_DESTROY(stcb);
4397                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4398                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4399                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4400                 SCTP_INP_WUNLOCK(inp);
4401                 SCTP_INP_INFO_WUNLOCK();
4402                 SCTP_DECR_ASOC_COUNT();
4403                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4404                 *error = EINVAL;
4405                 return (NULL);
4406         }
4407         SCTP_TCB_LOCK(stcb);
4408
4409         /* now that my_vtag is set, add it to the hash */
4410         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4411         /* put it in the bucket in the vtag hash of assoc's for the system */
4412         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4413         SCTP_INP_INFO_WUNLOCK();
4414
4415         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4416                 /* failure.. memory error? */
4417                 if (asoc->strmout) {
4418                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4419                         asoc->strmout = NULL;
4420                 }
4421                 if (asoc->mapping_array) {
4422                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4423                         asoc->mapping_array = NULL;
4424                 }
4425                 if (asoc->nr_mapping_array) {
4426                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4427                         asoc->nr_mapping_array = NULL;
4428                 }
4429                 SCTP_DECR_ASOC_COUNT();
4430                 SCTP_TCB_LOCK_DESTROY(stcb);
4431                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4432                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4433                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4434                 SCTP_INP_WUNLOCK(inp);
4435                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4436                 *error = ENOBUFS;
4437                 return (NULL);
4438         }
4439         /* Init all the timers */
4440         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4441         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4442         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4443         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4444         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4445         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4446         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4447
4448         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4449         /* now file the port under the hash as well */
4450         if (inp->sctp_tcbhash != NULL) {
4451                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4452                     inp->sctp_hashmark)];
4453                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4454         }
4455         SCTP_INP_WUNLOCK(inp);
4456         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
4457         return (stcb);
4458 }
4459
4460
4461 void
4462 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4463 {
4464         struct sctp_association *asoc;
4465
4466         asoc = &stcb->asoc;
4467         asoc->numnets--;
4468         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4469         if (net == asoc->primary_destination) {
4470                 /* Reset primary */
4471                 struct sctp_nets *lnet;
4472
4473                 lnet = TAILQ_FIRST(&asoc->nets);
4474                 /*
4475                  * Mobility adaptation Ideally, if deleted destination is
4476                  * the primary, it becomes a fast retransmission trigger by
4477                  * the subsequent SET PRIMARY. (by micchie)
4478                  */
4479                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4480                     SCTP_MOBILITY_BASE) ||
4481                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4482                     SCTP_MOBILITY_FASTHANDOFF)) {
4483                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4484                         if (asoc->deleted_primary != NULL) {
4485                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4486                                 goto out;
4487                         }
4488                         asoc->deleted_primary = net;
4489                         atomic_add_int(&net->ref_count, 1);
4490                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4491                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4492                         sctp_mobility_feature_on(stcb->sctp_ep,
4493                             SCTP_MOBILITY_PRIM_DELETED);
4494                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4495                             stcb->sctp_ep, stcb, NULL);
4496                 }
4497 out:
4498                 /* Try to find a confirmed primary */
4499                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4500         }
4501         if (net == asoc->last_data_chunk_from) {
4502                 /* Reset primary */
4503                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4504         }
4505         if (net == asoc->last_control_chunk_from) {
4506                 /* Clear net */
4507                 asoc->last_control_chunk_from = NULL;
4508         }
4509         if (net == stcb->asoc.alternate) {
4510                 sctp_free_remote_addr(stcb->asoc.alternate);
4511                 stcb->asoc.alternate = NULL;
4512         }
4513         sctp_free_remote_addr(net);
4514 }
4515
4516 /*
4517  * remove a remote endpoint address from an association, it will fail if the
4518  * address does not exist.
4519  */
4520 int
4521 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4522 {
4523         /*
4524          * Here we need to remove a remote address. This is quite simple, we
4525          * first find it in the list of address for the association
4526          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4527          * on that item. Note we do not allow it to be removed if there are
4528          * no other addresses.
4529          */
4530         struct sctp_association *asoc;
4531         struct sctp_nets *net, *nnet;
4532
4533         asoc = &stcb->asoc;
4534
4535         /* locate the address */
4536         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4537                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4538                         continue;
4539                 }
4540                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4541                     remaddr)) {
4542                         /* we found the guy */
4543                         if (asoc->numnets < 2) {
4544                                 /* Must have at LEAST two remote addresses */
4545                                 return (-1);
4546                         } else {
4547                                 sctp_remove_net(stcb, net);
4548                                 return (0);
4549                         }
4550                 }
4551         }
4552         /* not found. */
4553         return (-2);
4554 }
4555
4556 void
4557 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4558 {
4559         struct sctpvtaghead *chain;
4560         struct sctp_tagblock *twait_block;
4561         int found = 0;
4562         int i;
4563
4564         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4565         if (!LIST_EMPTY(chain)) {
4566                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4567                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4568                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4569                                     (twait_block->vtag_block[i].lport == lport) &&
4570                                     (twait_block->vtag_block[i].rport == rport)) {
4571                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4572                                         twait_block->vtag_block[i].v_tag = 0;
4573                                         twait_block->vtag_block[i].lport = 0;
4574                                         twait_block->vtag_block[i].rport = 0;
4575                                         found = 1;
4576                                         break;
4577                                 }
4578                         }
4579                         if (found)
4580                                 break;
4581                 }
4582         }
4583 }
4584
4585 int
4586 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4587 {
4588         struct sctpvtaghead *chain;
4589         struct sctp_tagblock *twait_block;
4590         int found = 0;
4591         int i;
4592
4593         SCTP_INP_INFO_WLOCK();
4594         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4595         if (!LIST_EMPTY(chain)) {
4596                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4597                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4598                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4599                                     (twait_block->vtag_block[i].lport == lport) &&
4600                                     (twait_block->vtag_block[i].rport == rport)) {
4601                                         found = 1;
4602                                         break;
4603                                 }
4604                         }
4605                         if (found)
4606                                 break;
4607                 }
4608         }
4609         SCTP_INP_INFO_WUNLOCK();
4610         return (found);
4611 }
4612
4613
4614 void
4615 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4616 {
4617         struct sctpvtaghead *chain;
4618         struct sctp_tagblock *twait_block;
4619         struct timeval now;
4620         int set, i;
4621
4622         if (time == 0) {
4623                 /* Its disabled */
4624                 return;
4625         }
4626         (void)SCTP_GETTIME_TIMEVAL(&now);
4627         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4628         set = 0;
4629         if (!LIST_EMPTY(chain)) {
4630                 /* Block(s) present, lets find space, and expire on the fly */
4631                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4632                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4633                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
4634                                     !set) {
4635                                         twait_block->vtag_block[i].tv_sec_at_expire =
4636                                             now.tv_sec + time;
4637                                         twait_block->vtag_block[i].v_tag = tag;
4638                                         twait_block->vtag_block[i].lport = lport;
4639                                         twait_block->vtag_block[i].rport = rport;
4640                                         set = 1;
4641                                 } else if ((twait_block->vtag_block[i].v_tag) &&
4642                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4643                                         /* Audit expires this guy */
4644                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4645                                         twait_block->vtag_block[i].v_tag = 0;
4646                                         twait_block->vtag_block[i].lport = 0;
4647                                         twait_block->vtag_block[i].rport = 0;
4648                                         if (set == 0) {
4649                                                 /* Reuse it for my new tag */
4650                                                 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4651                                                 twait_block->vtag_block[i].v_tag = tag;
4652                                                 twait_block->vtag_block[i].lport = lport;
4653                                                 twait_block->vtag_block[i].rport = rport;
4654                                                 set = 1;
4655                                         }
4656                                 }
4657                         }
4658                         if (set) {
4659                                 /*
4660                                  * We only do up to the block where we can
4661                                  * place our tag for audits
4662                                  */
4663                                 break;
4664                         }
4665                 }
4666         }
4667         /* Need to add a new block to chain */
4668         if (!set) {
4669                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4670                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4671                 if (twait_block == NULL) {
4672 #ifdef INVARIANTS
4673                         panic("Can not alloc tagblock");
4674 #endif
4675                         return;
4676                 }
4677                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4678                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4679                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4680                 twait_block->vtag_block[0].v_tag = tag;
4681                 twait_block->vtag_block[0].lport = lport;
4682                 twait_block->vtag_block[0].rport = rport;
4683         }
4684 }
4685
4686
4687
4688 /*-
4689  * Free the association after un-hashing the remote port. This
4690  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4691  * expect that the input to this function IS a locked TCB.
4692  * It will return 0, if it did NOT destroy the association (instead
4693  * it unlocks it. It will return NON-zero if it either destroyed the
4694  * association OR the association is already destroyed.
4695  */
4696 int
4697 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4698 {
4699         int i;
4700         struct sctp_association *asoc;
4701         struct sctp_nets *net, *nnet;
4702         struct sctp_laddr *laddr, *naddr;
4703         struct sctp_tmit_chunk *chk, *nchk;
4704         struct sctp_asconf_addr *aparam, *naparam;
4705         struct sctp_asconf_ack *aack, *naack;
4706         struct sctp_stream_reset_list *strrst, *nstrrst;
4707         struct sctp_queued_to_read *sq, *nsq;
4708         struct sctp_stream_queue_pending *sp, *nsp;
4709         sctp_sharedkey_t *shared_key, *nshared_key;
4710         struct socket *so;
4711
4712         /* first, lets purge the entry from the hash table. */
4713
4714 #ifdef SCTP_LOG_CLOSING
4715         sctp_log_closing(inp, stcb, 6);
4716 #endif
4717         if (stcb->asoc.state == 0) {
4718 #ifdef SCTP_LOG_CLOSING
4719                 sctp_log_closing(inp, NULL, 7);
4720 #endif
4721                 /* there is no asoc, really TSNH :-0 */
4722                 return (1);
4723         }
4724         if (stcb->asoc.alternate) {
4725                 sctp_free_remote_addr(stcb->asoc.alternate);
4726                 stcb->asoc.alternate = NULL;
4727         }
4728         /* TEMP CODE */
4729         if (stcb->freed_from_where == 0) {
4730                 /* Only record the first place free happened from */
4731                 stcb->freed_from_where = from_location;
4732         }
4733         /* TEMP CODE */
4734
4735         asoc = &stcb->asoc;
4736         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4737             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4738                 /* nothing around */
4739                 so = NULL;
4740         else
4741                 so = inp->sctp_socket;
4742
4743         /*
4744          * We used timer based freeing if a reader or writer is in the way.
4745          * So we first check if we are actually being called from a timer,
4746          * if so we abort early if a reader or writer is still in the way.
4747          */
4748         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4749             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4750                 /*
4751                  * is it the timer driving us? if so are the reader/writers
4752                  * gone?
4753                  */
4754                 if (stcb->asoc.refcnt) {
4755                         /* nope, reader or writer in the way */
4756                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4757                         /* no asoc destroyed */
4758                         SCTP_TCB_UNLOCK(stcb);
4759 #ifdef SCTP_LOG_CLOSING
4760                         sctp_log_closing(inp, stcb, 8);
4761 #endif
4762                         return (0);
4763                 }
4764         }
4765         /* now clean up any other timers */
4766         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4767         asoc->dack_timer.self = NULL;
4768         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4769         /*-
4770          * For stream reset we don't blast this unless
4771          * it is a str-reset timer, it might be the
4772          * free-asoc timer which we DON'T want to
4773          * disturb.
4774          */
4775         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4776                 asoc->strreset_timer.self = NULL;
4777         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4778         asoc->asconf_timer.self = NULL;
4779         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4780         asoc->autoclose_timer.self = NULL;
4781         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4782         asoc->shut_guard_timer.self = NULL;
4783         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4784         asoc->delayed_event_timer.self = NULL;
4785         /* Mobility adaptation */
4786         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4787         asoc->delete_prim_timer.self = NULL;
4788         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4789                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4790                 net->rxt_timer.self = NULL;
4791                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4792                 net->pmtu_timer.self = NULL;
4793                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4794                 net->hb_timer.self = NULL;
4795         }
4796         /* Now the read queue needs to be cleaned up (only once) */
4797         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4798                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4799                 SCTP_INP_READ_LOCK(inp);
4800                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4801                         if (sq->stcb == stcb) {
4802                                 sq->do_not_ref_stcb = 1;
4803                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4804                                 /*
4805                                  * If there is no end, there never will be
4806                                  * now.
4807                                  */
4808                                 if (sq->end_added == 0) {
4809                                         /* Held for PD-API clear that. */
4810                                         sq->pdapi_aborted = 1;
4811                                         sq->held_length = 0;
4812                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4813                                                 /*
4814                                                  * Need to add a PD-API
4815                                                  * aborted indication.
4816                                                  * Setting the control_pdapi
4817                                                  * assures that it will be
4818                                                  * added right after this
4819                                                  * msg.
4820                                                  */
4821                                                 uint32_t strseq;
4822
4823                                                 stcb->asoc.control_pdapi = sq;
4824                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4825                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4826                                                     stcb,
4827                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4828                                                     (void *)&strseq,
4829                                                     SCTP_SO_LOCKED);
4830                                                 stcb->asoc.control_pdapi = NULL;
4831                                         }
4832                                 }
4833                                 /* Add an end to wake them */
4834                                 sq->end_added = 1;
4835                         }
4836                 }
4837                 SCTP_INP_READ_UNLOCK(inp);
4838                 if (stcb->block_entry) {
4839                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4840                         stcb->block_entry->error = ECONNRESET;
4841                         stcb->block_entry = NULL;
4842                 }
4843         }
4844         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4845                 /*
4846                  * Someone holds a reference OR the socket is unaccepted
4847                  * yet.
4848                  */
4849                 if ((stcb->asoc.refcnt) ||
4850                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4851                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4852                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4853                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4854                 }
4855                 SCTP_TCB_UNLOCK(stcb);
4856                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4857                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4858                         /* nothing around */
4859                         so = NULL;
4860                 if (so) {
4861                         /* Wake any reader/writers */
4862                         sctp_sorwakeup(inp, so);
4863                         sctp_sowwakeup(inp, so);
4864                 }
4865 #ifdef SCTP_LOG_CLOSING
4866                 sctp_log_closing(inp, stcb, 9);
4867 #endif
4868                 /* no asoc destroyed */
4869                 return (0);
4870         }
4871 #ifdef SCTP_LOG_CLOSING
4872         sctp_log_closing(inp, stcb, 10);
4873 #endif
4874         /*
4875          * When I reach here, no others want to kill the assoc yet.. and I
4876          * own the lock. Now its possible an abort comes in when I do the
4877          * lock exchange below to grab all the locks to do the final take
4878          * out. to prevent this we increment the count, which will start a
4879          * timer and blow out above thus assuring us that we hold exclusive
4880          * killing of the asoc. Note that after getting back the TCB lock we
4881          * will go ahead and increment the counter back up and stop any
4882          * timer a passing stranger may have started :-S
4883          */
4884         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4885                 atomic_add_int(&stcb->asoc.refcnt, 1);
4886
4887                 SCTP_TCB_UNLOCK(stcb);
4888                 SCTP_INP_INFO_WLOCK();
4889                 SCTP_INP_WLOCK(inp);
4890                 SCTP_TCB_LOCK(stcb);
4891         }
4892         /* Double check the GONE flag */
4893         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4894             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4895                 /* nothing around */
4896                 so = NULL;
4897
4898         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4899             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4900                 /*
4901                  * For TCP type we need special handling when we are
4902                  * connected. We also include the peel'ed off ones to.
4903                  */
4904                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4905                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4906                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4907                         if (so) {
4908                                 SOCK_LOCK(so);
4909                                 if (so->so_rcv.sb_cc == 0) {
4910                                         so->so_state &= ~(SS_ISCONNECTING |
4911                                             SS_ISDISCONNECTING |
4912                                             SS_ISCONFIRMING |
4913                                             SS_ISCONNECTED);
4914                                 }
4915                                 socantrcvmore_locked(so);
4916                                 sctp_sowwakeup(inp, so);
4917                                 sctp_sorwakeup(inp, so);
4918                                 SCTP_SOWAKEUP(so);
4919                         }
4920                 }
4921         }
4922         /*
4923          * Make it invalid too, that way if its about to run it will abort
4924          * and return.
4925          */
4926         /* re-increment the lock */
4927         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4928                 atomic_add_int(&stcb->asoc.refcnt, -1);
4929         }
4930         if (stcb->asoc.refcnt) {
4931                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4932                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4933                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4934                         SCTP_INP_INFO_WUNLOCK();
4935                         SCTP_INP_WUNLOCK(inp);
4936                 }
4937                 SCTP_TCB_UNLOCK(stcb);
4938                 return (0);
4939         }
4940         asoc->state = 0;
4941         if (inp->sctp_tcbhash) {
4942                 LIST_REMOVE(stcb, sctp_tcbhash);
4943         }
4944         if (stcb->asoc.in_asocid_hash) {
4945                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4946         }
4947         /* Now lets remove it from the list of ALL associations in the EP */
4948         LIST_REMOVE(stcb, sctp_tcblist);
4949         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4950                 SCTP_INP_INCR_REF(inp);
4951                 SCTP_INP_WUNLOCK(inp);
4952         }
4953         /* pull from vtag hash */
4954         LIST_REMOVE(stcb, sctp_asocs);
4955         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4956             inp->sctp_lport, stcb->rport);
4957
4958         /*
4959          * Now restop the timers to be sure this is paranoia at is finest!
4960          */
4961         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4962         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4963         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4964         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4965         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4966         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4967         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4968         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4969                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4970                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4971                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4972         }
4973
4974         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4975         /*
4976          * The chunk lists and such SHOULD be empty but we check them just
4977          * in case.
4978          */
4979         /* anything on the wheel needs to be removed */
4980         for (i = 0; i < asoc->streamoutcnt; i++) {
4981                 struct sctp_stream_out *outs;
4982
4983                 outs = &asoc->strmout[i];
4984                 /* now clean up any chunks here */
4985                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4986                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4987                         sctp_free_spbufspace(stcb, asoc, sp);
4988                         if (sp->data) {
4989                                 if (so) {
4990                                         /* Still an open socket - report */
4991                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4992                                             0, (void *)sp, SCTP_SO_LOCKED);
4993                                 }
4994                                 if (sp->data) {
4995                                         sctp_m_freem(sp->data);
4996                                         sp->data = NULL;
4997                                         sp->tail_mbuf = NULL;
4998                                         sp->length = 0;
4999                                 }
5000                         }
5001                         if (sp->net) {
5002                                 sctp_free_remote_addr(sp->net);
5003                                 sp->net = NULL;
5004                         }
5005                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
5006                 }
5007         }
5008         /* sa_ignore FREED_MEMORY */
5009         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
5010                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
5011                 SCTP_FREE(strrst, SCTP_M_STRESET);
5012         }
5013         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
5014                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
5015                 if (sq->data) {
5016                         sctp_m_freem(sq->data);
5017                         sq->data = NULL;
5018                 }
5019                 sctp_free_remote_addr(sq->whoFrom);
5020                 sq->whoFrom = NULL;
5021                 sq->stcb = NULL;
5022                 /* Free the ctl entry */
5023                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
5024                 SCTP_DECR_READQ_COUNT();
5025                 /* sa_ignore FREED_MEMORY */
5026         }
5027         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
5028                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
5029                 if (chk->data) {
5030                         sctp_m_freem(chk->data);
5031                         chk->data = NULL;
5032                 }
5033                 if (chk->holds_key_ref)
5034                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5035                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5036                 SCTP_DECR_CHK_COUNT();
5037                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
5038                 asoc->free_chunk_cnt--;
5039                 /* sa_ignore FREED_MEMORY */
5040         }
5041         /* pending send queue SHOULD be empty */
5042         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5043                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5044                 if (chk->data) {
5045                         if (so) {
5046                                 /* Still a socket? */
5047                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5048                                     0, chk, SCTP_SO_LOCKED);
5049                         }
5050                         if (chk->data) {
5051                                 sctp_m_freem(chk->data);
5052                                 chk->data = NULL;
5053                         }
5054                 }
5055                 if (chk->holds_key_ref)
5056                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5057                 if (chk->whoTo) {
5058                         sctp_free_remote_addr(chk->whoTo);
5059                         chk->whoTo = NULL;
5060                 }
5061                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5062                 SCTP_DECR_CHK_COUNT();
5063                 /* sa_ignore FREED_MEMORY */
5064         }
5065         /* sent queue SHOULD be empty */
5066         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5067                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5068                 if (chk->data) {
5069                         if (so) {
5070                                 /* Still a socket? */
5071                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5072                                     0, chk, SCTP_SO_LOCKED);
5073                         }
5074                         if (chk->data) {
5075                                 sctp_m_freem(chk->data);
5076                                 chk->data = NULL;
5077                         }
5078                 }
5079                 if (chk->holds_key_ref)
5080                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5081                 sctp_free_remote_addr(chk->whoTo);
5082                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5083                 SCTP_DECR_CHK_COUNT();
5084                 /* sa_ignore FREED_MEMORY */
5085         }
5086         /* control queue MAY not be empty */
5087         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5088                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5089                 if (chk->data) {
5090                         sctp_m_freem(chk->data);
5091                         chk->data = NULL;
5092                 }
5093                 if (chk->holds_key_ref)
5094                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5095                 sctp_free_remote_addr(chk->whoTo);
5096                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5097                 SCTP_DECR_CHK_COUNT();
5098                 /* sa_ignore FREED_MEMORY */
5099         }
5100         /* ASCONF queue MAY not be empty */
5101         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5102                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5103                 if (chk->data) {
5104                         sctp_m_freem(chk->data);
5105                         chk->data = NULL;
5106                 }
5107                 if (chk->holds_key_ref)
5108                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5109                 sctp_free_remote_addr(chk->whoTo);
5110                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5111                 SCTP_DECR_CHK_COUNT();
5112                 /* sa_ignore FREED_MEMORY */
5113         }
5114         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5115                 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5116                 if (chk->data) {
5117                         sctp_m_freem(chk->data);
5118                         chk->data = NULL;
5119                 }
5120                 if (chk->holds_key_ref)
5121                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5122                 sctp_free_remote_addr(chk->whoTo);
5123                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5124                 SCTP_DECR_CHK_COUNT();
5125                 /* sa_ignore FREED_MEMORY */
5126         }
5127
5128         if (asoc->mapping_array) {
5129                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5130                 asoc->mapping_array = NULL;
5131         }
5132         if (asoc->nr_mapping_array) {
5133                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5134                 asoc->nr_mapping_array = NULL;
5135         }
5136         /* the stream outs */
5137         if (asoc->strmout) {
5138                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5139                 asoc->strmout = NULL;
5140         }
5141         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5142         if (asoc->strmin) {
5143                 struct sctp_queued_to_read *ctl, *nctl;
5144
5145                 for (i = 0; i < asoc->streamincnt; i++) {
5146                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5147                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5148                                 sctp_free_remote_addr(ctl->whoFrom);
5149                                 if (ctl->data) {
5150                                         sctp_m_freem(ctl->data);
5151                                         ctl->data = NULL;
5152                                 }
5153                                 /*
5154                                  * We don't free the address here since all
5155                                  * the net's were freed above.
5156                                  */
5157                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5158                                 SCTP_DECR_READQ_COUNT();
5159                         }
5160                 }
5161                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5162                 asoc->strmin = NULL;
5163         }
5164         asoc->streamincnt = 0;
5165         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5166 #ifdef INVARIANTS
5167                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5168                         panic("no net's left alloc'ed, or list points to itself");
5169                 }
5170 #endif
5171                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5172                 sctp_free_remote_addr(net);
5173         }
5174         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5175                 /* sa_ignore FREED_MEMORY */
5176                 sctp_remove_laddr(laddr);
5177         }
5178
5179         /* pending asconf (address) parameters */
5180         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5181                 /* sa_ignore FREED_MEMORY */
5182                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5183                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5184         }
5185         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5186                 /* sa_ignore FREED_MEMORY */
5187                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5188                 if (aack->data != NULL) {
5189                         sctp_m_freem(aack->data);
5190                 }
5191                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5192         }
5193         /* clean up auth stuff */
5194         if (asoc->local_hmacs)
5195                 sctp_free_hmaclist(asoc->local_hmacs);
5196         if (asoc->peer_hmacs)
5197                 sctp_free_hmaclist(asoc->peer_hmacs);
5198
5199         if (asoc->local_auth_chunks)
5200                 sctp_free_chunklist(asoc->local_auth_chunks);
5201         if (asoc->peer_auth_chunks)
5202                 sctp_free_chunklist(asoc->peer_auth_chunks);
5203
5204         sctp_free_authinfo(&asoc->authinfo);
5205
5206         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5207                 LIST_REMOVE(shared_key, next);
5208                 sctp_free_sharedkey(shared_key);
5209                 /* sa_ignore FREED_MEMORY */
5210         }
5211
5212         /* Insert new items here :> */
5213
5214         /* Get rid of LOCK */
5215         SCTP_TCB_LOCK_DESTROY(stcb);
5216         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5217         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5218                 SCTP_INP_INFO_WUNLOCK();
5219                 SCTP_INP_RLOCK(inp);
5220         }
5221 #ifdef SCTP_TRACK_FREED_ASOCS
5222         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5223                 /* now clean up the tasoc itself */
5224                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5225                 SCTP_DECR_ASOC_COUNT();
5226         } else {
5227                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5228         }
5229 #else
5230         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5231         SCTP_DECR_ASOC_COUNT();
5232 #endif
5233         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5234                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5235                         /*
5236                          * If its NOT the inp_free calling us AND sctp_close
5237                          * as been called, we call back...
5238                          */
5239                         SCTP_INP_RUNLOCK(inp);
5240                         /*
5241                          * This will start the kill timer (if we are the
5242                          * last one) since we hold an increment yet. But
5243                          * this is the only safe way to do this since
5244                          * otherwise if the socket closes at the same time
5245                          * we are here we might collide in the cleanup.
5246                          */
5247                         sctp_inpcb_free(inp,
5248                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5249                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5250                         SCTP_INP_DECR_REF(inp);
5251                         goto out_of;
5252                 } else {
5253                         /* The socket is still open. */
5254                         SCTP_INP_DECR_REF(inp);
5255                 }
5256         }
5257         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5258                 SCTP_INP_RUNLOCK(inp);
5259         }
5260 out_of:
5261         /* destroyed the asoc */
5262 #ifdef SCTP_LOG_CLOSING
5263         sctp_log_closing(inp, NULL, 11);
5264 #endif
5265         return (1);
5266 }
5267
5268
5269
5270 /*
5271  * determine if a destination is "reachable" based upon the addresses bound
5272  * to the current endpoint (e.g. only v4 or v6 currently bound)
5273  */
5274 /*
5275  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5276  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5277  * types bound as its endpoint
5278  */
5279 int
5280 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5281 {
5282         struct sctp_inpcb *inp;
5283         int answer;
5284
5285         /*
5286          * No locks here, the TCB, in all cases is already locked and an
5287          * assoc is up. There is either a INP lock by the caller applied (in
5288          * asconf case when deleting an address) or NOT in the HB case,
5289          * however if HB then the INP increment is up and the INP will not
5290          * be removed (on top of the fact that we have a TCB lock). So we
5291          * only want to read the sctp_flags, which is either bound-all or
5292          * not.. no protection needed since once an assoc is up you can't be
5293          * changing your binding.
5294          */
5295         inp = stcb->sctp_ep;
5296         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5297                 /* if bound all, destination is not restricted */
5298                 /*
5299                  * RRS: Question during lock work: Is this correct? If you
5300                  * are bound-all you still might need to obey the V4--V6
5301                  * flags??? IMO this bound-all stuff needs to be removed!
5302                  */
5303                 return (1);
5304         }
5305         /* NOTE: all "scope" checks are done when local addresses are added */
5306         switch (destaddr->sa_family) {
5307 #ifdef INET6
5308         case AF_INET6:
5309                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5310                 break;
5311 #endif
5312 #ifdef INET
5313         case AF_INET:
5314                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5315                 break;
5316 #endif
5317         default:
5318                 /* invalid family, so it's unreachable */
5319                 answer = 0;
5320                 break;
5321         }
5322         return (answer);
5323 }
5324
5325 /*
5326  * update the inp_vflags on an endpoint
5327  */
5328 static void
5329 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5330 {
5331         struct sctp_laddr *laddr;
5332
5333         /* first clear the flag */
5334         inp->ip_inp.inp.inp_vflag = 0;
5335         /* set the flag based on addresses on the ep list */
5336         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5337                 if (laddr->ifa == NULL) {
5338                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5339                             __FUNCTION__);
5340                         continue;
5341                 }
5342                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5343                         continue;
5344                 }
5345                 switch (laddr->ifa->address.sa.sa_family) {
5346 #ifdef INET6
5347                 case AF_INET6:
5348                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5349                         break;
5350 #endif
5351 #ifdef INET
5352                 case AF_INET:
5353                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5354                         break;
5355 #endif
5356                 default:
5357                         break;
5358                 }
5359         }
5360 }
5361
5362 /*
5363  * Add the address to the endpoint local address list There is nothing to be
5364  * done if we are bound to all addresses
5365  */
5366 void
5367 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5368 {
5369         struct sctp_laddr *laddr;
5370         int fnd, error = 0;
5371
5372         fnd = 0;
5373
5374         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5375                 /* You are already bound to all. You have it already */
5376                 return;
5377         }
5378 #ifdef INET6
5379         if (ifa->address.sa.sa_family == AF_INET6) {
5380                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5381                         /* Can't bind a non-useable addr. */
5382                         return;
5383                 }
5384         }
5385 #endif
5386         /* first, is it already present? */
5387         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5388                 if (laddr->ifa == ifa) {
5389                         fnd = 1;
5390                         break;
5391                 }
5392         }
5393
5394         if (fnd == 0) {
5395                 /* Not in the ep list */
5396                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5397                 if (error != 0)
5398                         return;
5399                 inp->laddr_count++;
5400                 /* update inp_vflag flags */
5401                 switch (ifa->address.sa.sa_family) {
5402 #ifdef INET6
5403                 case AF_INET6:
5404                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5405                         break;
5406 #endif
5407 #ifdef INET
5408                 case AF_INET:
5409                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5410                         break;
5411 #endif
5412                 default:
5413                         break;
5414                 }
5415         }
5416         return;
5417 }
5418
5419
5420 /*
5421  * select a new (hopefully reachable) destination net (should only be used
5422  * when we deleted an ep addr that is the only usable source address to reach
5423  * the destination net)
5424  */
5425 static void
5426 sctp_select_primary_destination(struct sctp_tcb *stcb)
5427 {
5428         struct sctp_nets *net;
5429
5430         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5431                 /* for now, we'll just pick the first reachable one we find */
5432                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5433                         continue;
5434                 if (sctp_destination_is_reachable(stcb,
5435                     (struct sockaddr *)&net->ro._l_addr)) {
5436                         /* found a reachable destination */
5437                         stcb->asoc.primary_destination = net;
5438                 }
5439         }
5440         /* I can't there from here! ...we're gonna die shortly... */
5441 }
5442
5443
5444 /*
5445  * Delete the address from the endpoint local address list There is nothing
5446  * to be done if we are bound to all addresses
5447  */
5448 void
5449 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5450 {
5451         struct sctp_laddr *laddr;
5452         int fnd;
5453
5454         fnd = 0;
5455         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5456                 /* You are already bound to all. You have it already */
5457                 return;
5458         }
5459         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5460                 if (laddr->ifa == ifa) {
5461                         fnd = 1;
5462                         break;
5463                 }
5464         }
5465         if (fnd && (inp->laddr_count < 2)) {
5466                 /* can't delete unless there are at LEAST 2 addresses */
5467                 return;
5468         }
5469         if (fnd) {
5470                 /*
5471                  * clean up any use of this address go through our
5472                  * associations and clear any last_used_address that match
5473                  * this one for each assoc, see if a new primary_destination
5474                  * is needed
5475                  */
5476                 struct sctp_tcb *stcb;
5477
5478                 /* clean up "next_addr_touse" */
5479                 if (inp->next_addr_touse == laddr)
5480                         /* delete this address */
5481                         inp->next_addr_touse = NULL;
5482
5483                 /* clean up "last_used_address" */
5484                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5485                         struct sctp_nets *net;
5486
5487                         SCTP_TCB_LOCK(stcb);
5488                         if (stcb->asoc.last_used_address == laddr)
5489                                 /* delete this address */
5490                                 stcb->asoc.last_used_address = NULL;
5491                         /*
5492                          * Now spin through all the nets and purge any ref
5493                          * to laddr
5494                          */
5495                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5496                                 if (net->ro._s_addr &&
5497                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5498                                         /* Yep, purge src address selected */
5499                                         sctp_rtentry_t *rt;
5500
5501                                         /* delete this address if cached */
5502                                         rt = net->ro.ro_rt;
5503                                         if (rt != NULL) {
5504                                                 RTFREE(rt);
5505                                                 net->ro.ro_rt = NULL;
5506                                         }
5507                                         sctp_free_ifa(net->ro._s_addr);
5508                                         net->ro._s_addr = NULL;
5509                                         net->src_addr_selected = 0;
5510                                 }
5511                         }
5512                         SCTP_TCB_UNLOCK(stcb);
5513                 }               /* for each tcb */
5514                 /* remove it from the ep list */
5515                 sctp_remove_laddr(laddr);
5516                 inp->laddr_count--;
5517                 /* update inp_vflag flags */
5518                 sctp_update_ep_vflag(inp);
5519         }
5520         return;
5521 }
5522
5523 /*
5524  * Add the address to the TCB local address restricted list.
5525  * This is a "pending" address list (eg. addresses waiting for an
5526  * ASCONF-ACK response) and cannot be used as a valid source address.
5527  */
5528 void
5529 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5530 {
5531         struct sctp_laddr *laddr;
5532         struct sctpladdr *list;
5533
5534         /*
5535          * Assumes TCB is locked.. and possibly the INP. May need to
5536          * confirm/fix that if we need it and is not the case.
5537          */
5538         list = &stcb->asoc.sctp_restricted_addrs;
5539
5540 #ifdef INET6
5541         if (ifa->address.sa.sa_family == AF_INET6) {
5542                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5543                         /* Can't bind a non-existent addr. */
5544                         return;
5545                 }
5546         }
5547 #endif
5548         /* does the address already exist? */
5549         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5550                 if (laddr->ifa == ifa) {
5551                         return;
5552                 }
5553         }
5554
5555         /* add to the list */
5556         (void)sctp_insert_laddr(list, ifa, 0);
5557         return;
5558 }
5559
5560 /*
5561  * insert an laddr entry with the given ifa for the desired list
5562  */
5563 int
5564 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5565 {
5566         struct sctp_laddr *laddr;
5567
5568         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5569         if (laddr == NULL) {
5570                 /* out of memory? */
5571                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5572                 return (EINVAL);
5573         }
5574         SCTP_INCR_LADDR_COUNT();
5575         bzero(laddr, sizeof(*laddr));
5576         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5577         laddr->ifa = ifa;
5578         laddr->action = act;
5579         atomic_add_int(&ifa->refcount, 1);
5580         /* insert it */
5581         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5582
5583         return (0);
5584 }
5585
5586 /*
5587  * Remove an laddr entry from the local address list (on an assoc)
5588  */
5589 void
5590 sctp_remove_laddr(struct sctp_laddr *laddr)
5591 {
5592
5593         /* remove from the list */
5594         LIST_REMOVE(laddr, sctp_nxt_addr);
5595         sctp_free_ifa(laddr->ifa);
5596         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5597         SCTP_DECR_LADDR_COUNT();
5598 }
5599
5600 /*
5601  * Remove a local address from the TCB local address restricted list
5602  */
5603 void
5604 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5605 {
5606         struct sctp_inpcb *inp;
5607         struct sctp_laddr *laddr;
5608
5609         /*
5610          * This is called by asconf work. It is assumed that a) The TCB is
5611          * locked and b) The INP is locked. This is true in as much as I can
5612          * trace through the entry asconf code where I did these locks.
5613          * Again, the ASCONF code is a bit different in that it does lock
5614          * the INP during its work often times. This must be since we don't
5615          * want other proc's looking up things while what they are looking
5616          * up is changing :-D
5617          */
5618
5619         inp = stcb->sctp_ep;
5620         /* if subset bound and don't allow ASCONF's, can't delete last */
5621         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5622             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5623                 if (stcb->sctp_ep->laddr_count < 2) {
5624                         /* can't delete last address */
5625                         return;
5626                 }
5627         }
5628         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5629                 /* remove the address if it exists */
5630                 if (laddr->ifa == NULL)
5631                         continue;
5632                 if (laddr->ifa == ifa) {
5633                         sctp_remove_laddr(laddr);
5634                         return;
5635                 }
5636         }
5637
5638         /* address not found! */
5639         return;
5640 }
5641
5642 /*
5643  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5644  */
5645 /* sysctl */
5646 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5647 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5648
5649
5650
5651 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5652 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5653 int *sctp_cpuarry = NULL;
5654 void
5655 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5656 {
5657         /* Queue a packet to a processor for the specified core */
5658         struct sctp_mcore_queue *qent;
5659         struct sctp_mcore_ctrl *wkq;
5660         int need_wake = 0;
5661
5662         if (sctp_mcore_workers == NULL) {
5663                 /* Something went way bad during setup */
5664                 sctp_input_with_port(m, off, 0);
5665                 return;
5666         }
5667         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5668             (sizeof(struct sctp_mcore_queue)),
5669             SCTP_M_MCORE);
5670         if (qent == NULL) {
5671                 /* This is trouble  */
5672                 sctp_input_with_port(m, off, 0);
5673                 return;
5674         }
5675         qent->vn = curvnet;
5676         qent->m = m;
5677         qent->off = off;
5678         qent->v6 = 0;
5679         wkq = &sctp_mcore_workers[cpu_to_use];
5680         SCTP_MCORE_QLOCK(wkq);
5681
5682         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5683         if (wkq->running == 0) {
5684                 need_wake = 1;
5685         }
5686         SCTP_MCORE_QUNLOCK(wkq);
5687         if (need_wake) {
5688                 wakeup(&wkq->running);
5689         }
5690 }
5691
5692 static void
5693 sctp_mcore_thread(void *arg)
5694 {
5695
5696         struct sctp_mcore_ctrl *wkq;
5697         struct sctp_mcore_queue *qent;
5698
5699         wkq = (struct sctp_mcore_ctrl *)arg;
5700         struct mbuf *m;
5701         int off, v6;
5702
5703         /* Wait for first tickle */
5704         SCTP_MCORE_LOCK(wkq);
5705         wkq->running = 0;
5706         msleep(&wkq->running,
5707             &wkq->core_mtx,
5708             0, "wait for pkt", 0);
5709         SCTP_MCORE_UNLOCK(wkq);
5710
5711         /* Bind to our cpu */
5712         thread_lock(curthread);
5713         sched_bind(curthread, wkq->cpuid);
5714         thread_unlock(curthread);
5715
5716         /* Now lets start working */
5717         SCTP_MCORE_LOCK(wkq);
5718         /* Now grab lock and go */
5719         for (;;) {
5720                 SCTP_MCORE_QLOCK(wkq);
5721 skip_sleep:
5722                 wkq->running = 1;
5723                 qent = TAILQ_FIRST(&wkq->que);
5724                 if (qent) {
5725                         TAILQ_REMOVE(&wkq->que, qent, next);
5726                         SCTP_MCORE_QUNLOCK(wkq);
5727                         CURVNET_SET(qent->vn);
5728                         m = qent->m;
5729                         off = qent->off;
5730                         v6 = qent->v6;
5731                         SCTP_FREE(qent, SCTP_M_MCORE);
5732                         if (v6 == 0) {
5733                                 sctp_input_with_port(m, off, 0);
5734                         } else {
5735                                 SCTP_PRINTF("V6 not yet supported\n");
5736                                 sctp_m_freem(m);
5737                         }
5738                         CURVNET_RESTORE();
5739                         SCTP_MCORE_QLOCK(wkq);
5740                 }
5741                 wkq->running = 0;
5742                 if (!TAILQ_EMPTY(&wkq->que)) {
5743                         goto skip_sleep;
5744                 }
5745                 SCTP_MCORE_QUNLOCK(wkq);
5746                 msleep(&wkq->running,
5747                     &wkq->core_mtx,
5748                     0, "wait for pkt", 0);
5749         }
5750 }
5751
5752 static void
5753 sctp_startup_mcore_threads(void)
5754 {
5755         int i, cpu;
5756
5757         if (mp_ncpus == 1)
5758                 return;
5759
5760         if (sctp_mcore_workers != NULL) {
5761                 /*
5762                  * Already been here in some previous vnet?
5763                  */
5764                 return;
5765         }
5766         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5767             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5768             SCTP_M_MCORE);
5769         if (sctp_mcore_workers == NULL) {
5770                 /* TSNH I hope */
5771                 return;
5772         }
5773         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5774             sizeof(struct sctp_mcore_ctrl)));
5775         /* Init the structures */
5776         for (i = 0; i <= mp_maxid; i++) {
5777                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5778                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5779                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5780                 sctp_mcore_workers[i].cpuid = i;
5781         }
5782         if (sctp_cpuarry == NULL) {
5783                 SCTP_MALLOC(sctp_cpuarry, int *,
5784                     (mp_ncpus * sizeof(int)),
5785                     SCTP_M_MCORE);
5786                 i = 0;
5787                 CPU_FOREACH(cpu) {
5788                         sctp_cpuarry[i] = cpu;
5789                         i++;
5790                 }
5791         }
5792         /* Now start them all */
5793         CPU_FOREACH(cpu) {
5794                 (void)kproc_create(sctp_mcore_thread,
5795                     (void *)&sctp_mcore_workers[cpu],
5796                     &sctp_mcore_workers[cpu].thread_proc,
5797                     RFPROC,
5798                     SCTP_KTHREAD_PAGES,
5799                     SCTP_MCORE_NAME);
5800
5801         }
5802 }
5803
5804 #endif
5805
5806 void
5807 sctp_pcb_init()
5808 {
5809         /*
5810          * SCTP initialization for the PCB structures should be called by
5811          * the sctp_init() funciton.
5812          */
5813         int i;
5814         struct timeval tv;
5815
5816         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5817                 /* error I was called twice */
5818                 return;
5819         }
5820         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5821
5822 #if defined(SCTP_LOCAL_TRACE_BUF)
5823         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5824 #endif
5825 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5826         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5827             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5828             SCTP_M_MCORE);
5829 #endif
5830         (void)SCTP_GETTIME_TIMEVAL(&tv);
5831 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5832         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5833         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5834         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5835 #else
5836         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5837         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5838         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5839 #endif
5840         /* init the empty list of (All) Endpoints */
5841         LIST_INIT(&SCTP_BASE_INFO(listhead));
5842
5843
5844         /* init the hash table of endpoints */
5845         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5846         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5847         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5848         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5849             &SCTP_BASE_INFO(hashasocmark));
5850         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5851             &SCTP_BASE_INFO(hashmark));
5852         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5853             &SCTP_BASE_INFO(hashtcpmark));
5854         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5855
5856
5857         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5858             &SCTP_BASE_INFO(hashvrfmark));
5859
5860         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5861             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5862         /* init the zones */
5863         /*
5864          * FIX ME: Should check for NULL returns, but if it does fail we are
5865          * doomed to panic anyways... add later maybe.
5866          */
5867         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5868             sizeof(struct sctp_inpcb), maxsockets);
5869
5870         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5871             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5872
5873         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5874             sizeof(struct sctp_laddr),
5875             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5876
5877         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5878             sizeof(struct sctp_nets),
5879             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5880
5881         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5882             sizeof(struct sctp_tmit_chunk),
5883             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5884
5885         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5886             sizeof(struct sctp_queued_to_read),
5887             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5888
5889         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5890             sizeof(struct sctp_stream_queue_pending),
5891             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5892
5893         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5894             sizeof(struct sctp_asconf),
5895             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5896
5897         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5898             sizeof(struct sctp_asconf_ack),
5899             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5900
5901
5902         /* Master Lock INIT for info structure */
5903         SCTP_INP_INFO_LOCK_INIT();
5904         SCTP_STATLOG_INIT_LOCK();
5905
5906         SCTP_IPI_COUNT_INIT();
5907         SCTP_IPI_ADDR_INIT();
5908 #ifdef SCTP_PACKET_LOGGING
5909         SCTP_IP_PKTLOG_INIT();
5910 #endif
5911         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5912
5913         SCTP_WQ_ADDR_INIT();
5914         /* not sure if we need all the counts */
5915         SCTP_BASE_INFO(ipi_count_ep) = 0;
5916         /* assoc/tcb zone info */
5917         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5918         /* local addrlist zone info */
5919         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5920         /* remote addrlist zone info */
5921         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5922         /* chunk info */
5923         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5924
5925         /* socket queue zone info */
5926         SCTP_BASE_INFO(ipi_count_readq) = 0;
5927
5928         /* stream out queue cont */
5929         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5930
5931         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5932         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5933
5934         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5935
5936         /* Init the TIMEWAIT list */
5937         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5938                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5939         }
5940
5941         sctp_startup_iterator();
5942
5943 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5944         sctp_startup_mcore_threads();
5945 #endif
5946
5947         /*
5948          * INIT the default VRF which for BSD is the only one, other O/S's
5949          * may have more. But initially they must start with one and then
5950          * add the VRF's as addresses are added.
5951          */
5952         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5953 }
5954
5955 /*
5956  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5957  */
5958 void
5959 sctp_pcb_finish(void)
5960 {
5961         struct sctp_vrflist *vrf_bucket;
5962         struct sctp_vrf *vrf, *nvrf;
5963         struct sctp_ifn *ifn, *nifn;
5964         struct sctp_ifa *ifa, *nifa;
5965         struct sctpvtaghead *chain;
5966         struct sctp_tagblock *twait_block, *prev_twait_block;
5967         struct sctp_laddr *wi, *nwi;
5968         int i;
5969
5970         /*
5971          * Free BSD the it thread never exits but we do clean up. The only
5972          * way freebsd reaches here if we have VRF's but we still add the
5973          * ifdef to make it compile on old versions.
5974          */
5975         {
5976                 struct sctp_iterator *it, *nit;
5977
5978                 SCTP_IPI_ITERATOR_WQ_LOCK();
5979                 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5980                         if (it->vn != curvnet) {
5981                                 continue;
5982                         }
5983                         TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5984                         if (it->function_atend != NULL) {
5985                                 (*it->function_atend) (it->pointer, it->val);
5986                         }
5987                         SCTP_FREE(it, SCTP_M_ITER);
5988                 }
5989                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5990                 SCTP_ITERATOR_LOCK();
5991                 if ((sctp_it_ctl.cur_it) &&
5992                     (sctp_it_ctl.cur_it->vn == curvnet)) {
5993                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5994                 }
5995                 SCTP_ITERATOR_UNLOCK();
5996         }
5997
5998         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5999         SCTP_WQ_ADDR_LOCK();
6000         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
6001                 LIST_REMOVE(wi, sctp_nxt_addr);
6002                 SCTP_DECR_LADDR_COUNT();
6003                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
6004         }
6005         SCTP_WQ_ADDR_UNLOCK();
6006
6007         /*
6008          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
6009          * destroyed first).
6010          */
6011         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
6012         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
6013                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
6014                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
6015                                 /* free the ifa */
6016                                 LIST_REMOVE(ifa, next_bucket);
6017                                 LIST_REMOVE(ifa, next_ifa);
6018                                 SCTP_FREE(ifa, SCTP_M_IFA);
6019                         }
6020                         /* free the ifn */
6021                         LIST_REMOVE(ifn, next_bucket);
6022                         LIST_REMOVE(ifn, next_ifn);
6023                         SCTP_FREE(ifn, SCTP_M_IFN);
6024                 }
6025                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
6026                 /* free the vrf */
6027                 LIST_REMOVE(vrf, next_vrf);
6028                 SCTP_FREE(vrf, SCTP_M_VRF);
6029         }
6030         /* free the vrf hashes */
6031         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
6032         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
6033
6034         /*
6035          * free the TIMEWAIT list elements malloc'd in the function
6036          * sctp_add_vtag_to_timewait()...
6037          */
6038         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6039                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
6040                 if (!LIST_EMPTY(chain)) {
6041                         prev_twait_block = NULL;
6042                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6043                                 if (prev_twait_block) {
6044                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6045                                 }
6046                                 prev_twait_block = twait_block;
6047                         }
6048                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6049                 }
6050         }
6051
6052         /* free the locks and mutexes */
6053 #ifdef SCTP_PACKET_LOGGING
6054         SCTP_IP_PKTLOG_DESTROY();
6055 #endif
6056         SCTP_IPI_ADDR_DESTROY();
6057         SCTP_STATLOG_DESTROY();
6058         SCTP_INP_INFO_LOCK_DESTROY();
6059
6060         SCTP_WQ_ADDR_DESTROY();
6061
6062         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6063         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6064         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6065         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6066         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6067         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6068         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6069         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6070         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6071         /* Get rid of other stuff to */
6072         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6073                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6074         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6075                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6076         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6077                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6078 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6079         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6080 #endif
6081 }
6082
6083
6084 int
6085 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6086     int offset, int limit, struct sctphdr *sh,
6087     struct sockaddr *altsa)
6088 {
6089         /*
6090          * grub through the INIT pulling addresses and loading them to the
6091          * nets structure in the asoc. The from address in the mbuf should
6092          * also be loaded (if it is not already). This routine can be called
6093          * with either INIT or INIT-ACK's as long as the m points to the IP
6094          * packet and the offset points to the beginning of the parameters.
6095          */
6096         struct sctp_inpcb *inp;
6097         struct sctp_nets *net, *nnet, *net_tmp;
6098         struct ip *iph;
6099         struct sctp_paramhdr *phdr, parm_buf;
6100         struct sctp_tcb *stcb_tmp;
6101         uint16_t ptype, plen;
6102         struct sockaddr *sa;
6103         struct sockaddr_storage dest_store;
6104         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
6105         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6106         struct sctp_auth_random *p_random = NULL;
6107         uint16_t random_len = 0;
6108         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6109         struct sctp_auth_hmac_algo *hmacs = NULL;
6110         uint16_t hmacs_len = 0;
6111         uint8_t saw_asconf = 0;
6112         uint8_t saw_asconf_ack = 0;
6113         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6114         struct sctp_auth_chunk_list *chunks = NULL;
6115         uint16_t num_chunks = 0;
6116         sctp_key_t *new_key;
6117         uint32_t keylen;
6118         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6119         uint8_t ecn_allowed;
6120
6121 #ifdef INET
6122         struct sockaddr_in sin;
6123
6124 #endif
6125 #ifdef INET6
6126         struct sockaddr_in6 sin6;
6127
6128 #endif
6129
6130         /* First get the destination address setup too. */
6131 #ifdef INET
6132         memset(&sin, 0, sizeof(sin));
6133         sin.sin_family = AF_INET;
6134         sin.sin_len = sizeof(sin);
6135         sin.sin_port = stcb->rport;
6136 #endif
6137 #ifdef INET6
6138         memset(&sin6, 0, sizeof(sin6));
6139         sin6.sin6_family = AF_INET6;
6140         sin6.sin6_len = sizeof(struct sockaddr_in6);
6141         sin6.sin6_port = stcb->rport;
6142 #endif
6143         iph = mtod(m, struct ip *);
6144         switch (iph->ip_v) {
6145 #ifdef INET
6146         case IPVERSION:
6147                 {
6148                         /* its IPv4 */
6149                         struct sockaddr_in *sin_2;
6150
6151                         sin_2 = (struct sockaddr_in *)(local_sa);
6152                         memset(sin_2, 0, sizeof(sin));
6153                         sin_2->sin_family = AF_INET;
6154                         sin_2->sin_len = sizeof(sin);
6155                         sin_2->sin_port = sh->dest_port;
6156                         sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
6157                         if (altsa) {
6158                                 /*
6159                                  * For cookies we use the src address NOT
6160                                  * from the packet but from the original
6161                                  * INIT.
6162                                  */
6163                                 sa = altsa;
6164                         } else {
6165                                 sin.sin_addr = iph->ip_src;
6166                                 sa = (struct sockaddr *)&sin;
6167                         }
6168                         break;
6169                 }
6170 #endif
6171 #ifdef INET6
6172         case IPV6_VERSION >> 4:
6173                 {
6174                         /* its IPv6 */
6175                         struct ip6_hdr *ip6;
6176                         struct sockaddr_in6 *sin6_2;
6177
6178                         ip6 = mtod(m, struct ip6_hdr *);
6179                         sin6_2 = (struct sockaddr_in6 *)(local_sa);
6180                         memset(sin6_2, 0, sizeof(sin6));
6181                         sin6_2->sin6_family = AF_INET6;
6182                         sin6_2->sin6_len = sizeof(struct sockaddr_in6);
6183                         sin6_2->sin6_port = sh->dest_port;
6184                         sin6_2->sin6_addr = ip6->ip6_dst;
6185                         if (altsa) {
6186                                 /*
6187                                  * For cookies we use the src address NOT
6188                                  * from the packet but from the original
6189                                  * INIT.
6190                                  */
6191                                 sa = altsa;
6192                         } else {
6193                                 sin6.sin6_addr = ip6->ip6_src;
6194                                 sa = (struct sockaddr *)&sin6;
6195                         }
6196                         break;
6197                 }
6198 #endif
6199         default:
6200                 return (-1);
6201                 break;
6202         }
6203         /* Turn off ECN until we get through all params */
6204         ecn_allowed = 0;
6205         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6206                 /* mark all addresses that we have currently on the list */
6207                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6208         }
6209         /* does the source address already exist? if so skip it */
6210         inp = stcb->sctp_ep;
6211         atomic_add_int(&stcb->asoc.refcnt, 1);
6212         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
6213         atomic_add_int(&stcb->asoc.refcnt, -1);
6214
6215         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6216                 /* we must add the source address */
6217                 /* no scope set here since we have a tcb already. */
6218                 switch (sa->sa_family) {
6219 #ifdef INET
6220                 case AF_INET:
6221                         if (stcb->asoc.ipv4_addr_legal) {
6222                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6223                                         return (-1);
6224                                 }
6225                         }
6226                         break;
6227 #endif
6228 #ifdef INET6
6229                 case AF_INET6:
6230                         if (stcb->asoc.ipv6_addr_legal) {
6231                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6232                                         return (-2);
6233                                 }
6234                         }
6235                         break;
6236 #endif
6237                 default:
6238                         break;
6239                 }
6240         } else {
6241                 if (net_tmp != NULL && stcb_tmp == stcb) {
6242                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6243                 } else if (stcb_tmp != stcb) {
6244                         /* It belongs to another association? */
6245                         if (stcb_tmp)
6246                                 SCTP_TCB_UNLOCK(stcb_tmp);
6247                         return (-3);
6248                 }
6249         }
6250         if (stcb->asoc.state == 0) {
6251                 /* the assoc was freed? */
6252                 return (-4);
6253         }
6254         /*
6255          * peer must explicitly turn this on. This may have been initialized
6256          * to be "on" in order to allow local addr changes while INIT's are
6257          * in flight.
6258          */
6259         stcb->asoc.peer_supports_asconf = 0;
6260         /* now we must go through each of the params. */
6261         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6262         while (phdr) {
6263                 ptype = ntohs(phdr->param_type);
6264                 plen = ntohs(phdr->param_length);
6265                 /*
6266                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6267                  * (uint32_t)ptype, (int)plen);
6268                  */
6269                 if (offset + plen > limit) {
6270                         break;
6271                 }
6272                 if (plen == 0) {
6273                         break;
6274                 }
6275 #ifdef INET
6276                 if (ptype == SCTP_IPV4_ADDRESS) {
6277                         if (stcb->asoc.ipv4_addr_legal) {
6278                                 struct sctp_ipv4addr_param *p4, p4_buf;
6279
6280                                 /* ok get the v4 address and check/add */
6281                                 phdr = sctp_get_next_param(m, offset,
6282                                     (struct sctp_paramhdr *)&p4_buf,
6283                                     sizeof(p4_buf));
6284                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6285                                     phdr == NULL) {
6286                                         return (-5);
6287                                 }
6288                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6289                                 sin.sin_addr.s_addr = p4->addr;
6290                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6291                                         /* Skip multi-cast addresses */
6292                                         goto next_param;
6293                                 }
6294                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6295                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6296                                         goto next_param;
6297                                 }
6298                                 sa = (struct sockaddr *)&sin;
6299                                 inp = stcb->sctp_ep;
6300                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6301                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6302                                     local_sa, stcb);
6303                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6304
6305                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6306                                     inp == NULL) {
6307                                         /* we must add the source address */
6308                                         /*
6309                                          * no scope set since we have a tcb
6310                                          * already
6311                                          */
6312
6313                                         /*
6314                                          * we must validate the state again
6315                                          * here
6316                                          */
6317                         add_it_now:
6318                                         if (stcb->asoc.state == 0) {
6319                                                 /* the assoc was freed? */
6320                                                 return (-7);
6321                                         }
6322                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6323                                                 return (-8);
6324                                         }
6325                                 } else if (stcb_tmp == stcb) {
6326                                         if (stcb->asoc.state == 0) {
6327                                                 /* the assoc was freed? */
6328                                                 return (-10);
6329                                         }
6330                                         if (net != NULL) {
6331                                                 /* clear flag */
6332                                                 net->dest_state &=
6333                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6334                                         }
6335                                 } else {
6336                                         /*
6337                                          * strange, address is in another
6338                                          * assoc? straighten out locks.
6339                                          */
6340                                         if (stcb_tmp) {
6341                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6342                                                         /*
6343                                                          * in setup state we
6344                                                          * abort this guy
6345                                                          */
6346                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6347                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6348                                                         goto add_it_now;
6349                                                 }
6350                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6351                                         }
6352                                         if (stcb->asoc.state == 0) {
6353                                                 /* the assoc was freed? */
6354                                                 return (-12);
6355                                         }
6356                                         return (-13);
6357                                 }
6358                         }
6359                 } else
6360 #endif
6361 #ifdef INET6
6362                 if (ptype == SCTP_IPV6_ADDRESS) {
6363                         if (stcb->asoc.ipv6_addr_legal) {
6364                                 /* ok get the v6 address and check/add */
6365                                 struct sctp_ipv6addr_param *p6, p6_buf;
6366
6367                                 phdr = sctp_get_next_param(m, offset,
6368                                     (struct sctp_paramhdr *)&p6_buf,
6369                                     sizeof(p6_buf));
6370                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6371                                     phdr == NULL) {
6372                                         return (-14);
6373                                 }
6374                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6375                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6376                                     sizeof(p6->addr));
6377                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6378                                         /* Skip multi-cast addresses */
6379                                         goto next_param;
6380                                 }
6381                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6382                                         /*
6383                                          * Link local make no sense without
6384                                          * scope
6385                                          */
6386                                         goto next_param;
6387                                 }
6388                                 sa = (struct sockaddr *)&sin6;
6389                                 inp = stcb->sctp_ep;
6390                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6391                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6392                                     local_sa, stcb);
6393                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6394                                 if (stcb_tmp == NULL &&
6395                                     (inp == stcb->sctp_ep || inp == NULL)) {
6396                                         /*
6397                                          * we must validate the state again
6398                                          * here
6399                                          */
6400                         add_it_now6:
6401                                         if (stcb->asoc.state == 0) {
6402                                                 /* the assoc was freed? */
6403                                                 return (-16);
6404                                         }
6405                                         /*
6406                                          * we must add the address, no scope
6407                                          * set
6408                                          */
6409                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6410                                                 return (-17);
6411                                         }
6412                                 } else if (stcb_tmp == stcb) {
6413                                         /*
6414                                          * we must validate the state again
6415                                          * here
6416                                          */
6417                                         if (stcb->asoc.state == 0) {
6418                                                 /* the assoc was freed? */
6419                                                 return (-19);
6420                                         }
6421                                         if (net != NULL) {
6422                                                 /* clear flag */
6423                                                 net->dest_state &=
6424                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6425                                         }
6426                                 } else {
6427                                         /*
6428                                          * strange, address is in another
6429                                          * assoc? straighten out locks.
6430                                          */
6431                                         if (stcb_tmp)
6432                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6433                                                         /*
6434                                                          * in setup state we
6435                                                          * abort this guy
6436                                                          */
6437                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6438                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6439                                                         goto add_it_now6;
6440                                                 }
6441                                         SCTP_TCB_UNLOCK(stcb_tmp);
6442
6443                                         if (stcb->asoc.state == 0) {
6444                                                 /* the assoc was freed? */
6445                                                 return (-21);
6446                                         }
6447                                         return (-22);
6448                                 }
6449                         }
6450                 } else
6451 #endif
6452                 if (ptype == SCTP_ECN_CAPABLE) {
6453                         ecn_allowed = 1;
6454                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6455                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6456                                 struct sctp_adaptation_layer_indication ai,
6457                                                                 *aip;
6458
6459                                 phdr = sctp_get_next_param(m, offset,
6460                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6461                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6462                                 if (aip) {
6463                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6464                                         stcb->asoc.adaptation_needed = 1;
6465                                 }
6466                         }
6467                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6468                         struct sctp_asconf_addr_param lstore, *fee;
6469                         int lptype;
6470                         struct sockaddr *lsa = NULL;
6471
6472 #ifdef INET
6473                         struct sctp_asconf_addrv4_param *fii;
6474
6475 #endif
6476
6477                         stcb->asoc.peer_supports_asconf = 1;
6478                         if (plen > sizeof(lstore)) {
6479                                 return (-23);
6480                         }
6481                         phdr = sctp_get_next_param(m, offset,
6482                             (struct sctp_paramhdr *)&lstore,
6483                             min(plen, sizeof(lstore)));
6484                         if (phdr == NULL) {
6485                                 return (-24);
6486                         }
6487                         fee = (struct sctp_asconf_addr_param *)phdr;
6488                         lptype = ntohs(fee->addrp.ph.param_type);
6489                         switch (lptype) {
6490 #ifdef INET
6491                         case SCTP_IPV4_ADDRESS:
6492                                 if (plen !=
6493                                     sizeof(struct sctp_asconf_addrv4_param)) {
6494                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6495                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6496                                             plen);
6497                                 } else {
6498                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6499                                         sin.sin_addr.s_addr = fii->addrp.addr;
6500                                         lsa = (struct sockaddr *)&sin;
6501                                 }
6502                                 break;
6503 #endif
6504 #ifdef INET6
6505                         case SCTP_IPV6_ADDRESS:
6506                                 if (plen !=
6507                                     sizeof(struct sctp_asconf_addr_param)) {
6508                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6509                                             (int)sizeof(struct sctp_asconf_addr_param),
6510                                             plen);
6511                                 } else {
6512                                         memcpy(sin6.sin6_addr.s6_addr,
6513                                             fee->addrp.addr,
6514                                             sizeof(fee->addrp.addr));
6515                                         lsa = (struct sockaddr *)&sin6;
6516                                 }
6517                                 break;
6518 #endif
6519                         default:
6520                                 break;
6521                         }
6522                         if (lsa) {
6523                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6524                         }
6525                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6526                         stcb->asoc.peer_supports_nat = 1;
6527                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6528                         /* Peer supports pr-sctp */
6529                         stcb->asoc.peer_supports_prsctp = 1;
6530                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6531                         /* A supported extension chunk */
6532                         struct sctp_supported_chunk_types_param *pr_supported;
6533                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6534                         int num_ent, i;
6535
6536                         phdr = sctp_get_next_param(m, offset,
6537                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6538                         if (phdr == NULL) {
6539                                 return (-25);
6540                         }
6541                         stcb->asoc.peer_supports_asconf = 0;
6542                         stcb->asoc.peer_supports_prsctp = 0;
6543                         stcb->asoc.peer_supports_pktdrop = 0;
6544                         stcb->asoc.peer_supports_strreset = 0;
6545                         stcb->asoc.peer_supports_nr_sack = 0;
6546                         stcb->asoc.peer_supports_auth = 0;
6547                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6548                         num_ent = plen - sizeof(struct sctp_paramhdr);
6549                         for (i = 0; i < num_ent; i++) {
6550                                 switch (pr_supported->chunk_types[i]) {
6551                                 case SCTP_ASCONF:
6552                                 case SCTP_ASCONF_ACK:
6553                                         stcb->asoc.peer_supports_asconf = 1;
6554                                         break;
6555                                 case SCTP_FORWARD_CUM_TSN:
6556                                         stcb->asoc.peer_supports_prsctp = 1;
6557                                         break;
6558                                 case SCTP_PACKET_DROPPED:
6559                                         stcb->asoc.peer_supports_pktdrop = 1;
6560                                         break;
6561                                 case SCTP_NR_SELECTIVE_ACK:
6562                                         stcb->asoc.peer_supports_nr_sack = 1;
6563                                         break;
6564                                 case SCTP_STREAM_RESET:
6565                                         stcb->asoc.peer_supports_strreset = 1;
6566                                         break;
6567                                 case SCTP_AUTHENTICATION:
6568                                         stcb->asoc.peer_supports_auth = 1;
6569                                         break;
6570                                 default:
6571                                         /* one I have not learned yet */
6572                                         break;
6573
6574                                 }
6575                         }
6576                 } else if (ptype == SCTP_RANDOM) {
6577                         if (plen > sizeof(random_store))
6578                                 break;
6579                         if (got_random) {
6580                                 /* already processed a RANDOM */
6581                                 goto next_param;
6582                         }
6583                         phdr = sctp_get_next_param(m, offset,
6584                             (struct sctp_paramhdr *)random_store,
6585                             min(sizeof(random_store), plen));
6586                         if (phdr == NULL)
6587                                 return (-26);
6588                         p_random = (struct sctp_auth_random *)phdr;
6589                         random_len = plen - sizeof(*p_random);
6590                         /* enforce the random length */
6591                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6592                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6593                                 return (-27);
6594                         }
6595                         got_random = 1;
6596                 } else if (ptype == SCTP_HMAC_LIST) {
6597                         int num_hmacs;
6598                         int i;
6599
6600                         if (plen > sizeof(hmacs_store))
6601                                 break;
6602                         if (got_hmacs) {
6603                                 /* already processed a HMAC list */
6604                                 goto next_param;
6605                         }
6606                         phdr = sctp_get_next_param(m, offset,
6607                             (struct sctp_paramhdr *)hmacs_store,
6608                             min(plen, sizeof(hmacs_store)));
6609                         if (phdr == NULL)
6610                                 return (-28);
6611                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6612                         hmacs_len = plen - sizeof(*hmacs);
6613                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6614                         /* validate the hmac list */
6615                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6616                                 return (-29);
6617                         }
6618                         if (stcb->asoc.peer_hmacs != NULL)
6619                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6620                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6621                         if (stcb->asoc.peer_hmacs != NULL) {
6622                                 for (i = 0; i < num_hmacs; i++) {
6623                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6624                                             ntohs(hmacs->hmac_ids[i]));
6625                                 }
6626                         }
6627                         got_hmacs = 1;
6628                 } else if (ptype == SCTP_CHUNK_LIST) {
6629                         int i;
6630
6631                         if (plen > sizeof(chunks_store))
6632                                 break;
6633                         if (got_chklist) {
6634                                 /* already processed a Chunks list */
6635                                 goto next_param;
6636                         }
6637                         phdr = sctp_get_next_param(m, offset,
6638                             (struct sctp_paramhdr *)chunks_store,
6639                             min(plen, sizeof(chunks_store)));
6640                         if (phdr == NULL)
6641                                 return (-30);
6642                         chunks = (struct sctp_auth_chunk_list *)phdr;
6643                         num_chunks = plen - sizeof(*chunks);
6644                         if (stcb->asoc.peer_auth_chunks != NULL)
6645                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6646                         else
6647                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6648                         for (i = 0; i < num_chunks; i++) {
6649                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6650                                     stcb->asoc.peer_auth_chunks);
6651                                 /* record asconf/asconf-ack if listed */
6652                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6653                                         saw_asconf = 1;
6654                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6655                                         saw_asconf_ack = 1;
6656
6657                         }
6658                         got_chklist = 1;
6659                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6660                             (ptype == SCTP_STATE_COOKIE) ||
6661                             (ptype == SCTP_UNRECOG_PARAM) ||
6662                             (ptype == SCTP_COOKIE_PRESERVE) ||
6663                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6664                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6665                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6666                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6667                     (ptype == SCTP_SUCCESS_REPORT)) {
6668                          /* don't care */ ;
6669                 } else {
6670                         if ((ptype & 0x8000) == 0x0000) {
6671                                 /*
6672                                  * must stop processing the rest of the
6673                                  * param's. Any report bits were handled
6674                                  * with the call to
6675                                  * sctp_arethere_unrecognized_parameters()
6676                                  * when the INIT or INIT-ACK was first seen.
6677                                  */
6678                                 break;
6679                         }
6680                 }
6681
6682 next_param:
6683                 offset += SCTP_SIZE32(plen);
6684                 if (offset >= limit) {
6685                         break;
6686                 }
6687                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6688                     sizeof(parm_buf));
6689         }
6690         /* Now check to see if we need to purge any addresses */
6691         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6692                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6693                     SCTP_ADDR_NOT_IN_ASSOC) {
6694                         /* This address has been removed from the asoc */
6695                         /* remove and free it */
6696                         stcb->asoc.numnets--;
6697                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6698                         sctp_free_remote_addr(net);
6699                         if (net == stcb->asoc.primary_destination) {
6700                                 stcb->asoc.primary_destination = NULL;
6701                                 sctp_select_primary_destination(stcb);
6702                         }
6703                 }
6704         }
6705         if (ecn_allowed == 0) {
6706                 stcb->asoc.ecn_allowed = 0;
6707         }
6708         /* validate authentication required parameters */
6709         if (got_random && got_hmacs) {
6710                 stcb->asoc.peer_supports_auth = 1;
6711         } else {
6712                 stcb->asoc.peer_supports_auth = 0;
6713         }
6714         if (!stcb->asoc.peer_supports_auth && got_chklist) {
6715                 /* peer does not support auth but sent a chunks list? */
6716                 return (-31);
6717         }
6718         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6719             !stcb->asoc.peer_supports_auth) {
6720                 /* peer supports asconf but not auth? */
6721                 return (-32);
6722         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6723             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6724                 return (-33);
6725         }
6726         /* concatenate the full random key */
6727         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6728         if (chunks != NULL) {
6729                 keylen += sizeof(*chunks) + num_chunks;
6730         }
6731         new_key = sctp_alloc_key(keylen);
6732         if (new_key != NULL) {
6733                 /* copy in the RANDOM */
6734                 if (p_random != NULL) {
6735                         keylen = sizeof(*p_random) + random_len;
6736                         bcopy(p_random, new_key->key, keylen);
6737                 }
6738                 /* append in the AUTH chunks */
6739                 if (chunks != NULL) {
6740                         bcopy(chunks, new_key->key + keylen,
6741                             sizeof(*chunks) + num_chunks);
6742                         keylen += sizeof(*chunks) + num_chunks;
6743                 }
6744                 /* append in the HMACs */
6745                 if (hmacs != NULL) {
6746                         bcopy(hmacs, new_key->key + keylen,
6747                             sizeof(*hmacs) + hmacs_len);
6748                 }
6749         } else {
6750                 /* failed to get memory for the key */
6751                 return (-34);
6752         }
6753         if (stcb->asoc.authinfo.peer_random != NULL)
6754                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6755         stcb->asoc.authinfo.peer_random = new_key;
6756         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6757         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6758
6759         return (0);
6760 }
6761
6762 int
6763 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6764     struct sctp_nets *net)
6765 {
6766         /* make sure the requested primary address exists in the assoc */
6767         if (net == NULL && sa)
6768                 net = sctp_findnet(stcb, sa);
6769
6770         if (net == NULL) {
6771                 /* didn't find the requested primary address! */
6772                 return (-1);
6773         } else {
6774                 /* set the primary address */
6775                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6776                         /* Must be confirmed, so queue to set */
6777                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6778                         return (0);
6779                 }
6780                 stcb->asoc.primary_destination = net;
6781                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6782                         sctp_free_remote_addr(stcb->asoc.alternate);
6783                         stcb->asoc.alternate = NULL;
6784                 }
6785                 net = TAILQ_FIRST(&stcb->asoc.nets);
6786                 if (net != stcb->asoc.primary_destination) {
6787                         /*
6788                          * first one on the list is NOT the primary
6789                          * sctp_cmpaddr() is much more efficient if the
6790                          * primary is the first on the list, make it so.
6791                          */
6792                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6793                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6794                 }
6795                 return (0);
6796         }
6797 }
6798
6799 int
6800 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6801 {
6802         /*
6803          * This function serves two purposes. It will see if a TAG can be
6804          * re-used and return 1 for yes it is ok and 0 for don't use that
6805          * tag. A secondary function it will do is purge out old tags that
6806          * can be removed.
6807          */
6808         struct sctpvtaghead *chain;
6809         struct sctp_tagblock *twait_block;
6810         struct sctpasochead *head;
6811         struct sctp_tcb *stcb;
6812         int i;
6813
6814         SCTP_INP_INFO_RLOCK();
6815         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6816             SCTP_BASE_INFO(hashasocmark))];
6817         if (head == NULL) {
6818                 /* invalid vtag */
6819                 goto skip_vtag_check;
6820         }
6821         LIST_FOREACH(stcb, head, sctp_asocs) {
6822                 /*
6823                  * We choose not to lock anything here. TCB's can't be
6824                  * removed since we have the read lock, so they can't be
6825                  * freed on us, same thing for the INP. I may be wrong with
6826                  * this assumption, but we will go with it for now :-)
6827                  */
6828                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6829                         continue;
6830                 }
6831                 if (stcb->asoc.my_vtag == tag) {
6832                         /* candidate */
6833                         if (stcb->rport != rport) {
6834                                 continue;
6835                         }
6836                         if (stcb->sctp_ep->sctp_lport != lport) {
6837                                 continue;
6838                         }
6839                         /* Its a used tag set */
6840                         SCTP_INP_INFO_RUNLOCK();
6841                         return (0);
6842                 }
6843         }
6844 skip_vtag_check:
6845
6846         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6847         /* Now what about timed wait ? */
6848         if (!LIST_EMPTY(chain)) {
6849                 /*
6850                  * Block(s) are present, lets see if we have this tag in the
6851                  * list
6852                  */
6853                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6854                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6855                                 if (twait_block->vtag_block[i].v_tag == 0) {
6856                                         /* not used */
6857                                         continue;
6858                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6859                                     now->tv_sec) {
6860                                         /* Audit expires this guy */
6861                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
6862                                         twait_block->vtag_block[i].v_tag = 0;
6863                                         twait_block->vtag_block[i].lport = 0;
6864                                         twait_block->vtag_block[i].rport = 0;
6865                                 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6866                                             (twait_block->vtag_block[i].lport == lport) &&
6867                                     (twait_block->vtag_block[i].rport == rport)) {
6868                                         /* Bad tag, sorry :< */
6869                                         SCTP_INP_INFO_RUNLOCK();
6870                                         return (0);
6871                                 }
6872                         }
6873                 }
6874         }
6875         SCTP_INP_INFO_RUNLOCK();
6876         return (1);
6877 }
6878
6879 static void
6880 sctp_drain_mbufs(struct sctp_tcb *stcb)
6881 {
6882         /*
6883          * We must hunt this association for MBUF's past the cumack (i.e.
6884          * out of order data that we can renege on).
6885          */
6886         struct sctp_association *asoc;
6887         struct sctp_tmit_chunk *chk, *nchk;
6888         uint32_t cumulative_tsn_p1;
6889         struct sctp_queued_to_read *ctl, *nctl;
6890         int cnt, strmat;
6891         uint32_t gap, i;
6892         int fnd = 0;
6893
6894         /* We look for anything larger than the cum-ack + 1 */
6895
6896         asoc = &stcb->asoc;
6897         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6898                 /* none we can reneg on. */
6899                 return;
6900         }
6901         SCTP_STAT_INCR(sctps_protocol_drains_done);
6902         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6903         cnt = 0;
6904         /* First look in the re-assembly queue */
6905         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6906                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6907                         /* Yep it is above cum-ack */
6908                         cnt++;
6909                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6910                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6911                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6912                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6913                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6914                         if (chk->data) {
6915                                 sctp_m_freem(chk->data);
6916                                 chk->data = NULL;
6917                         }
6918                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6919                 }
6920         }
6921         /* Ok that was fun, now we will drain all the inbound streams? */
6922         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6923                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6924                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6925                                 /* Yep it is above cum-ack */
6926                                 cnt++;
6927                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6928                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6929                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6930                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6931                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6932                                 if (ctl->data) {
6933                                         sctp_m_freem(ctl->data);
6934                                         ctl->data = NULL;
6935                                 }
6936                                 sctp_free_remote_addr(ctl->whoFrom);
6937                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6938                                 SCTP_DECR_READQ_COUNT();
6939                         }
6940                 }
6941         }
6942         if (cnt) {
6943                 /* We must back down to see what the new highest is */
6944                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6945                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6946                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6947                                 asoc->highest_tsn_inside_map = i;
6948                                 fnd = 1;
6949                                 break;
6950                         }
6951                 }
6952                 if (!fnd) {
6953                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6954                 }
6955                 /*
6956                  * Question, should we go through the delivery queue? The
6957                  * only reason things are on here is the app not reading OR
6958                  * a p-d-api up. An attacker COULD send enough in to
6959                  * initiate the PD-API and then send a bunch of stuff to
6960                  * other streams... these would wind up on the delivery
6961                  * queue.. and then we would not get to them. But in order
6962                  * to do this I then have to back-track and un-deliver
6963                  * sequence numbers in streams.. el-yucko. I think for now
6964                  * we will NOT look at the delivery queue and leave it to be
6965                  * something to consider later. An alternative would be to
6966                  * abort the P-D-API with a notification and then deliver
6967                  * the data.... Or another method might be to keep track of
6968                  * how many times the situation occurs and if we see a
6969                  * possible attack underway just abort the association.
6970                  */
6971 #ifdef SCTP_DEBUG
6972                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6973 #endif
6974                 /*
6975                  * Now do we need to find a new
6976                  * asoc->highest_tsn_inside_map?
6977                  */
6978                 asoc->last_revoke_count = cnt;
6979                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6980                 /* sa_ignore NO_NULL_CHK */
6981                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6982                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6983         }
6984         /*
6985          * Another issue, in un-setting the TSN's in the mapping array we
6986          * DID NOT adjust the highest_tsn marker.  This will cause one of
6987          * two things to occur. It may cause us to do extra work in checking
6988          * for our mapping array movement. More importantly it may cause us
6989          * to SACK every datagram. This may not be a bad thing though since
6990          * we will recover once we get our cum-ack above and all this stuff
6991          * we dumped recovered.
6992          */
6993 }
6994
6995 void
6996 sctp_drain()
6997 {
6998         /*
6999          * We must walk the PCB lists for ALL associations here. The system
7000          * is LOW on MBUF's and needs help. This is where reneging will
7001          * occur. We really hope this does NOT happen!
7002          */
7003         VNET_ITERATOR_DECL(vnet_iter);
7004         VNET_LIST_RLOCK_NOSLEEP();
7005         VNET_FOREACH(vnet_iter) {
7006                 CURVNET_SET(vnet_iter);
7007                 struct sctp_inpcb *inp;
7008                 struct sctp_tcb *stcb;
7009
7010                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
7011                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7012 #ifdef VIMAGE
7013                         continue;
7014 #else
7015                         return;
7016 #endif
7017                 }
7018                 SCTP_INP_INFO_RLOCK();
7019                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7020                         /* For each endpoint */
7021                         SCTP_INP_RLOCK(inp);
7022                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7023                                 /* For each association */
7024                                 SCTP_TCB_LOCK(stcb);
7025                                 sctp_drain_mbufs(stcb);
7026                                 SCTP_TCB_UNLOCK(stcb);
7027                         }
7028                         SCTP_INP_RUNLOCK(inp);
7029                 }
7030                 SCTP_INP_INFO_RUNLOCK();
7031                 CURVNET_RESTORE();
7032         }
7033         VNET_LIST_RUNLOCK_NOSLEEP();
7034 }
7035
7036 /*
7037  * start a new iterator
7038  * iterates through all endpoints and associations based on the pcb_state
7039  * flags and asoc_state.  "af" (mandatory) is executed for all matching
7040  * assocs and "ef" (optional) is executed when the iterator completes.
7041  * "inpf" (optional) is executed for each new endpoint as it is being
7042  * iterated through. inpe (optional) is called when the inp completes
7043  * its way through all the stcbs.
7044  */
7045 int
7046 sctp_initiate_iterator(inp_func inpf,
7047     asoc_func af,
7048     inp_func inpe,
7049     uint32_t pcb_state,
7050     uint32_t pcb_features,
7051     uint32_t asoc_state,
7052     void *argp,
7053     uint32_t argi,
7054     end_func ef,
7055     struct sctp_inpcb *s_inp,
7056     uint8_t chunk_output_off)
7057 {
7058         struct sctp_iterator *it = NULL;
7059
7060         if (af == NULL) {
7061                 return (-1);
7062         }
7063         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7064             SCTP_M_ITER);
7065         if (it == NULL) {
7066                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7067                 return (ENOMEM);
7068         }
7069         memset(it, 0, sizeof(*it));
7070         it->function_assoc = af;
7071         it->function_inp = inpf;
7072         if (inpf)
7073                 it->done_current_ep = 0;
7074         else
7075                 it->done_current_ep = 1;
7076         it->function_atend = ef;
7077         it->pointer = argp;
7078         it->val = argi;
7079         it->pcb_flags = pcb_state;
7080         it->pcb_features = pcb_features;
7081         it->asoc_state = asoc_state;
7082         it->function_inp_end = inpe;
7083         it->no_chunk_output = chunk_output_off;
7084         it->vn = curvnet;
7085         if (s_inp) {
7086                 /* Assume lock is held here */
7087                 it->inp = s_inp;
7088                 SCTP_INP_INCR_REF(it->inp);
7089                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7090         } else {
7091                 SCTP_INP_INFO_RLOCK();
7092                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7093                 if (it->inp) {
7094                         SCTP_INP_INCR_REF(it->inp);
7095                 }
7096                 SCTP_INP_INFO_RUNLOCK();
7097                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7098
7099         }
7100         SCTP_IPI_ITERATOR_WQ_LOCK();
7101
7102         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7103         if (sctp_it_ctl.iterator_running == 0) {
7104                 sctp_wakeup_iterator();
7105         }
7106         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7107         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7108         return (0);
7109 }