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                 case AF_INET:
3129                         {
3130                                 struct sockaddr_in *sin;
3131
3132                                 sin = (struct sockaddr_in *)&store_sa;
3133                                 memcpy(sin, addr, sizeof(struct sockaddr_in));
3134                                 sin->sin_port = 0;
3135                                 break;
3136                         }
3137                 case AF_INET6:
3138                         {
3139                                 struct sockaddr_in6 *sin6;
3140
3141                                 sin6 = (struct sockaddr_in6 *)&store_sa;
3142                                 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3143                                 sin6->sin6_port = 0;
3144                                 break;
3145                         }
3146                 default:
3147                         break;
3148                 }
3149                 /*
3150                  * first find the interface with the bound address need to
3151                  * zero out the port to find the address! yuck! can't do
3152                  * this earlier since need port for sctp_pcb_findep()
3153                  */
3154                 if (sctp_ifap != NULL)
3155                         ifa = sctp_ifap;
3156                 else {
3157                         /*
3158                          * Note for BSD we hit here always other O/S's will
3159                          * pass things in via the sctp_ifap argument
3160                          * (Panda).
3161                          */
3162                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3163                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3164                 }
3165                 if (ifa == NULL) {
3166                         /* Can't find an interface with that address */
3167                         SCTP_INP_WUNLOCK(inp);
3168                         SCTP_INP_INFO_WUNLOCK();
3169                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3170                         return (EADDRNOTAVAIL);
3171                 }
3172 #ifdef INET6
3173                 if (addr->sa_family == AF_INET6) {
3174                         /* GAK, more FIXME IFA lock? */
3175                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3176                                 /* Can't bind a non-existent addr. */
3177                                 SCTP_INP_WUNLOCK(inp);
3178                                 SCTP_INP_INFO_WUNLOCK();
3179                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3180                                 return (EINVAL);
3181                         }
3182                 }
3183 #endif
3184                 /* we're not bound all */
3185                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3186                 /* allow bindx() to send ASCONF's for binding changes */
3187                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3188                 /* clear automatic addr changes from kernel flag */
3189                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3190
3191                 /* add this address to the endpoint list */
3192                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3193                 if (error != 0) {
3194                         SCTP_INP_WUNLOCK(inp);
3195                         SCTP_INP_INFO_WUNLOCK();
3196                         return (error);
3197                 }
3198                 inp->laddr_count++;
3199         }
3200         /* find the bucket */
3201         if (port_reuse_active) {
3202                 /* Put it into tcp 1-2-1 hash */
3203                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3204                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3205         } else {
3206                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3207         }
3208         /* put it in the bucket */
3209         LIST_INSERT_HEAD(head, inp, sctp_hash);
3210         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3211             head, ntohs(lport), port_reuse_active);
3212         /* set in the port */
3213         inp->sctp_lport = lport;
3214
3215         /* turn off just the unbound flag */
3216         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3217         SCTP_INP_WUNLOCK(inp);
3218         SCTP_INP_INFO_WUNLOCK();
3219         return (0);
3220 }
3221
3222
3223 static void
3224 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3225 {
3226         struct sctp_iterator *it, *nit;
3227
3228         /*
3229          * We enter with the only the ITERATOR_LOCK in place and a write
3230          * lock on the inp_info stuff.
3231          */
3232         it = sctp_it_ctl.cur_it;
3233         if (it && (it->vn != curvnet)) {
3234                 /* Its not looking at our VNET */
3235                 return;
3236         }
3237         if (it && (it->inp == inp)) {
3238                 /*
3239                  * This is tricky and we hold the iterator lock, but when it
3240                  * returns and gets the lock (when we release it) the
3241                  * iterator will try to operate on inp. We need to stop that
3242                  * from happening. But of course the iterator has a
3243                  * reference on the stcb and inp. We can mark it and it will
3244                  * stop.
3245                  *
3246                  * If its a single iterator situation, we set the end iterator
3247                  * flag. Otherwise we set the iterator to go to the next
3248                  * inp.
3249                  *
3250                  */
3251                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3252                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3253                 } else {
3254                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3255                 }
3256         }
3257         /*
3258          * Now go through and remove any single reference to our inp that
3259          * may be still pending on the list
3260          */
3261         SCTP_IPI_ITERATOR_WQ_LOCK();
3262         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3263                 if (it->vn != curvnet) {
3264                         continue;
3265                 }
3266                 if (it->inp == inp) {
3267                         /* This one points to me is it inp specific? */
3268                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3269                                 /* Remove and free this one */
3270                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3271                                     it, sctp_nxt_itr);
3272                                 if (it->function_atend != NULL) {
3273                                         (*it->function_atend) (it->pointer, it->val);
3274                                 }
3275                                 SCTP_FREE(it, SCTP_M_ITER);
3276                         } else {
3277                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3278                                 if (it->inp) {
3279                                         SCTP_INP_INCR_REF(it->inp);
3280                                 }
3281                         }
3282                         /*
3283                          * When its put in the refcnt is incremented so decr
3284                          * it
3285                          */
3286                         SCTP_INP_DECR_REF(inp);
3287                 }
3288         }
3289         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3290 }
3291
3292 /* release sctp_inpcb unbind the port */
3293 void
3294 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3295 {
3296         /*
3297          * Here we free a endpoint. We must find it (if it is in the Hash
3298          * table) and remove it from there. Then we must also find it in the
3299          * overall list and remove it from there. After all removals are
3300          * complete then any timer has to be stopped. Then start the actual
3301          * freeing. a) Any local lists. b) Any associations. c) The hash of
3302          * all associations. d) finally the ep itself.
3303          */
3304         struct sctp_tcb *asoc, *nasoc;
3305         struct sctp_laddr *laddr, *nladdr;
3306         struct inpcb *ip_pcb;
3307         struct socket *so;
3308         int being_refed = 0;
3309         struct sctp_queued_to_read *sq, *nsq;
3310         int cnt;
3311         sctp_sharedkey_t *shared_key, *nshared_key;
3312
3313
3314 #ifdef SCTP_LOG_CLOSING
3315         sctp_log_closing(inp, NULL, 0);
3316 #endif
3317         SCTP_ITERATOR_LOCK();
3318         /* mark any iterators on the list or being processed */
3319         sctp_iterator_inp_being_freed(inp);
3320         SCTP_ITERATOR_UNLOCK();
3321         so = inp->sctp_socket;
3322         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3323                 /* been here before.. eeks.. get out of here */
3324                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3325 #ifdef SCTP_LOG_CLOSING
3326                 sctp_log_closing(inp, NULL, 1);
3327 #endif
3328                 return;
3329         }
3330         SCTP_ASOC_CREATE_LOCK(inp);
3331         SCTP_INP_INFO_WLOCK();
3332
3333         SCTP_INP_WLOCK(inp);
3334         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3335                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3336                 /* socket is gone, so no more wakeups allowed */
3337                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3338                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3339                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3340
3341         }
3342         /* First time through we have the socket lock, after that no more. */
3343         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3344             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3345
3346         if (inp->control) {
3347                 sctp_m_freem(inp->control);
3348                 inp->control = NULL;
3349         }
3350         if (inp->pkt) {
3351                 sctp_m_freem(inp->pkt);
3352                 inp->pkt = NULL;
3353         }
3354         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3355                                          * here but I will be nice :> (i.e.
3356                                          * ip_pcb = ep;) */
3357         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3358                 int cnt_in_sd;
3359
3360                 cnt_in_sd = 0;
3361                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3362                         SCTP_TCB_LOCK(asoc);
3363                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3364                                 /* Skip guys being freed */
3365                                 cnt_in_sd++;
3366                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3367                                         /*
3368                                          * Special case - we did not start a
3369                                          * kill timer on the asoc due to it
3370                                          * was not closed. So go ahead and
3371                                          * start it now.
3372                                          */
3373                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3374                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3375                                 }
3376                                 SCTP_TCB_UNLOCK(asoc);
3377                                 continue;
3378                         }
3379                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3380                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3381                             (asoc->asoc.total_output_queue_size == 0)) {
3382                                 /*
3383                                  * If we have data in queue, we don't want
3384                                  * to just free since the app may have done,
3385                                  * send()/close or connect/send/close. And
3386                                  * it wants the data to get across first.
3387                                  */
3388                                 /* Just abandon things in the front states */
3389                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3390                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3391                                         cnt_in_sd++;
3392                                 }
3393                                 continue;
3394                         }
3395                         /* Disconnect the socket please */
3396                         asoc->sctp_socket = NULL;
3397                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3398                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3399                             (asoc->asoc.control_pdapi) ||
3400                             (asoc->asoc.size_on_all_streams > 0) ||
3401                             (so && (so->so_rcv.sb_cc > 0))) {
3402                                 /* Left with Data unread */
3403                                 struct mbuf *op_err;
3404
3405                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3406                                     0, M_DONTWAIT, 1, MT_DATA);
3407                                 if (op_err) {
3408                                         /* Fill in the user initiated abort */
3409                                         struct sctp_paramhdr *ph;
3410                                         uint32_t *ippp;
3411
3412                                         SCTP_BUF_LEN(op_err) =
3413                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
3414                                         ph = mtod(op_err,
3415                                             struct sctp_paramhdr *);
3416                                         ph->param_type = htons(
3417                                             SCTP_CAUSE_USER_INITIATED_ABT);
3418                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
3419                                         ippp = (uint32_t *) (ph + 1);
3420                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
3421                                 }
3422                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3423                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3424                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3425                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3426                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3427                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3428                                 }
3429                                 if (sctp_free_assoc(inp, asoc,
3430                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3431                                         cnt_in_sd++;
3432                                 }
3433                                 continue;
3434                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3435                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3436                                     (asoc->asoc.stream_queue_cnt == 0)
3437                             ) {
3438                                 if (asoc->asoc.locked_on_sending) {
3439                                         goto abort_anyway;
3440                                 }
3441                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3442                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3443                                         struct sctp_nets *netp;
3444
3445                                         if (asoc->asoc.alternate) {
3446                                                 netp = asoc->asoc.alternate;
3447                                         } else {
3448                                                 netp = asoc->asoc.primary_destination;
3449                                         }
3450                                         /*
3451                                          * there is nothing queued to send,
3452                                          * so I send shutdown
3453                                          */
3454                                         sctp_send_shutdown(asoc, netp);
3455                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3456                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3457                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3458                                         }
3459                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3460                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3461                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3462                                             netp);
3463                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3464                                             asoc->asoc.primary_destination);
3465                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3466                                 }
3467                         } else {
3468                                 /* mark into shutdown pending */
3469                                 struct sctp_stream_queue_pending *sp;
3470
3471                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3472                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3473                                     asoc->asoc.primary_destination);
3474                                 if (asoc->asoc.locked_on_sending) {
3475                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3476                                             sctp_streamhead);
3477                                         if (sp == NULL) {
3478                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3479                                                     asoc->asoc.locked_on_sending,
3480                                                     asoc->asoc.locked_on_sending->stream_no);
3481                                         } else {
3482                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3483                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3484                                         }
3485                                 }
3486                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3487                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3488                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3489                                         struct mbuf *op_err;
3490
3491                         abort_anyway:
3492                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3493                                             0, M_DONTWAIT, 1, MT_DATA);
3494                                         if (op_err) {
3495                                                 /*
3496                                                  * Fill in the user
3497                                                  * initiated abort
3498                                                  */
3499                                                 struct sctp_paramhdr *ph;
3500                                                 uint32_t *ippp;
3501
3502                                                 SCTP_BUF_LEN(op_err) =
3503                                                     (sizeof(struct sctp_paramhdr) +
3504                                                     sizeof(uint32_t));
3505                                                 ph = mtod(op_err,
3506                                                     struct sctp_paramhdr *);
3507                                                 ph->param_type = htons(
3508                                                     SCTP_CAUSE_USER_INITIATED_ABT);
3509                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3510                                                 ippp = (uint32_t *) (ph + 1);
3511                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
3512                                         }
3513                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3514                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3515                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3516                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3517                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3518                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3519                                         }
3520                                         if (sctp_free_assoc(inp, asoc,
3521                                             SCTP_PCBFREE_NOFORCE,
3522                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3523                                                 cnt_in_sd++;
3524                                         }
3525                                         continue;
3526                                 } else {
3527                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3528                                 }
3529                         }
3530                         cnt_in_sd++;
3531                         SCTP_TCB_UNLOCK(asoc);
3532                 }
3533                 /* now is there some left in our SHUTDOWN state? */
3534                 if (cnt_in_sd) {
3535 #ifdef SCTP_LOG_CLOSING
3536                         sctp_log_closing(inp, NULL, 2);
3537 #endif
3538                         inp->sctp_socket = NULL;
3539                         SCTP_INP_WUNLOCK(inp);
3540                         SCTP_ASOC_CREATE_UNLOCK(inp);
3541                         SCTP_INP_INFO_WUNLOCK();
3542                         return;
3543                 }
3544         }
3545         inp->sctp_socket = NULL;
3546         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3547             SCTP_PCB_FLAGS_UNBOUND) {
3548                 /*
3549                  * ok, this guy has been bound. It's port is somewhere in
3550                  * the SCTP_BASE_INFO(hash table). Remove it!
3551                  */
3552                 LIST_REMOVE(inp, sctp_hash);
3553                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3554         }
3555         /*
3556          * If there is a timer running to kill us, forget it, since it may
3557          * have a contest on the INP lock.. which would cause us to die ...
3558          */
3559         cnt = 0;
3560         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3561                 SCTP_TCB_LOCK(asoc);
3562                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3563                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3564                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3565                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3566                         }
3567                         cnt++;
3568                         SCTP_TCB_UNLOCK(asoc);
3569                         continue;
3570                 }
3571                 /* Free associations that are NOT killing us */
3572                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3573                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3574                         struct mbuf *op_err;
3575                         uint32_t *ippp;
3576
3577                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3578                             0, M_DONTWAIT, 1, MT_DATA);
3579                         if (op_err) {
3580                                 /* Fill in the user initiated abort */
3581                                 struct sctp_paramhdr *ph;
3582
3583                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
3584                                     sizeof(uint32_t));
3585                                 ph = mtod(op_err, struct sctp_paramhdr *);
3586                                 ph->param_type = htons(
3587                                     SCTP_CAUSE_USER_INITIATED_ABT);
3588                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3589                                 ippp = (uint32_t *) (ph + 1);
3590                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
3591
3592                         }
3593                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3594                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3595                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3596                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3597                         cnt++;
3598                         SCTP_TCB_UNLOCK(asoc);
3599                         continue;
3600                 }
3601                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3602                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3603                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3604                 }
3605                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3606                         cnt++;
3607                 }
3608         }
3609         if (cnt) {
3610                 /* Ok we have someone out there that will kill us */
3611                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3612 #ifdef SCTP_LOG_CLOSING
3613                 sctp_log_closing(inp, NULL, 3);
3614 #endif
3615                 SCTP_INP_WUNLOCK(inp);
3616                 SCTP_ASOC_CREATE_UNLOCK(inp);
3617                 SCTP_INP_INFO_WUNLOCK();
3618                 return;
3619         }
3620         if (SCTP_INP_LOCK_CONTENDED(inp))
3621                 being_refed++;
3622         if (SCTP_INP_READ_CONTENDED(inp))
3623                 being_refed++;
3624         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3625                 being_refed++;
3626
3627         if ((inp->refcount) ||
3628             (being_refed) ||
3629             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3630                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3631 #ifdef SCTP_LOG_CLOSING
3632                 sctp_log_closing(inp, NULL, 4);
3633 #endif
3634                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3635                 SCTP_INP_WUNLOCK(inp);
3636                 SCTP_ASOC_CREATE_UNLOCK(inp);
3637                 SCTP_INP_INFO_WUNLOCK();
3638                 return;
3639         }
3640         inp->sctp_ep.signature_change.type = 0;
3641         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3642         /*
3643          * Remove it from the list .. last thing we need a lock for.
3644          */
3645         LIST_REMOVE(inp, sctp_list);
3646         SCTP_INP_WUNLOCK(inp);
3647         SCTP_ASOC_CREATE_UNLOCK(inp);
3648         SCTP_INP_INFO_WUNLOCK();
3649         /*
3650          * Now we release all locks. Since this INP cannot be found anymore
3651          * except possibly by the kill timer that might be running. We call
3652          * the drain function here. It should hit the case were it sees the
3653          * ACTIVE flag cleared and exit out freeing us to proceed and
3654          * destroy everything.
3655          */
3656         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3657                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3658         } else {
3659                 /* Probably un-needed */
3660                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3661         }
3662
3663 #ifdef SCTP_LOG_CLOSING
3664         sctp_log_closing(inp, NULL, 5);
3665 #endif
3666
3667
3668         if ((inp->sctp_asocidhash) != NULL) {
3669                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3670                 inp->sctp_asocidhash = NULL;
3671         }
3672         /* sa_ignore FREED_MEMORY */
3673         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3674                 /* Its only abandoned if it had data left */
3675                 if (sq->length)
3676                         SCTP_STAT_INCR(sctps_left_abandon);
3677
3678                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3679                 sctp_free_remote_addr(sq->whoFrom);
3680                 if (so)
3681                         so->so_rcv.sb_cc -= sq->length;
3682                 if (sq->data) {
3683                         sctp_m_freem(sq->data);
3684                         sq->data = NULL;
3685                 }
3686                 /*
3687                  * no need to free the net count, since at this point all
3688                  * assoc's are gone.
3689                  */
3690                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3691                 SCTP_DECR_READQ_COUNT();
3692         }
3693         /* Now the sctp_pcb things */
3694         /*
3695          * free each asoc if it is not already closed/free. we can't use the
3696          * macro here since le_next will get freed as part of the
3697          * sctp_free_assoc() call.
3698          */
3699         if (so) {
3700 #ifdef IPSEC
3701                 ipsec_delete_pcbpolicy(ip_pcb);
3702 #endif                          /* IPSEC */
3703
3704                 /* Unlocks not needed since the socket is gone now */
3705         }
3706         if (ip_pcb->inp_options) {
3707                 (void)sctp_m_free(ip_pcb->inp_options);
3708                 ip_pcb->inp_options = 0;
3709         }
3710 #ifdef INET6
3711         if (ip_pcb->inp_vflag & INP_IPV6) {
3712                 struct in6pcb *in6p;
3713
3714                 in6p = (struct in6pcb *)inp;
3715                 ip6_freepcbopts(in6p->in6p_outputopts);
3716         }
3717 #endif                          /* INET6 */
3718         ip_pcb->inp_vflag = 0;
3719         /* free up authentication fields */
3720         if (inp->sctp_ep.local_auth_chunks != NULL)
3721                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3722         if (inp->sctp_ep.local_hmacs != NULL)
3723                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3724
3725         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3726                 LIST_REMOVE(shared_key, next);
3727                 sctp_free_sharedkey(shared_key);
3728                 /* sa_ignore FREED_MEMORY */
3729         }
3730
3731         /*
3732          * if we have an address list the following will free the list of
3733          * ifaddr's that are set into this ep. Again macro limitations here,
3734          * since the LIST_FOREACH could be a bad idea.
3735          */
3736         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3737                 sctp_remove_laddr(laddr);
3738         }
3739
3740 #ifdef SCTP_TRACK_FREED_ASOCS
3741         /* TEMP CODE */
3742         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3743                 LIST_REMOVE(asoc, sctp_tcblist);
3744                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3745                 SCTP_DECR_ASOC_COUNT();
3746         }
3747         /* *** END TEMP CODE *** */
3748 #endif
3749         /* Now lets see about freeing the EP hash table. */
3750         if (inp->sctp_tcbhash != NULL) {
3751                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3752                 inp->sctp_tcbhash = NULL;
3753         }
3754         /* Now we must put the ep memory back into the zone pool */
3755         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3756         SCTP_INP_LOCK_DESTROY(inp);
3757         SCTP_INP_READ_DESTROY(inp);
3758         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3759         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3760         SCTP_DECR_EP_COUNT();
3761 }
3762
3763
3764 struct sctp_nets *
3765 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3766 {
3767         struct sctp_nets *net;
3768
3769         /* locate the address */
3770         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3771                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3772                         return (net);
3773         }
3774         return (NULL);
3775 }
3776
3777
3778 int
3779 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3780 {
3781         struct sctp_ifa *sctp_ifa;
3782
3783         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3784         if (sctp_ifa) {
3785                 return (1);
3786         } else {
3787                 return (0);
3788         }
3789 }
3790
3791 /*
3792  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3793  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3794  * stats of stuff.
3795  */
3796 int
3797 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3798     struct sctp_nets **netp, int set_scope, int from)
3799 {
3800         /*
3801          * The following is redundant to the same lines in the
3802          * sctp_aloc_assoc() but is needed since others call the add address
3803          * function
3804          */
3805         struct sctp_nets *net, *netfirst;
3806         int addr_inscope;
3807
3808         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3809             from);
3810         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3811
3812         netfirst = sctp_findnet(stcb, newaddr);
3813         if (netfirst) {
3814                 /*
3815                  * Lie and return ok, we don't want to make the association
3816                  * go away for this behavior. It will happen in the TCP
3817                  * model in a connected socket. It does not reach the hash
3818                  * table until after the association is built so it can't be
3819                  * found. Mark as reachable, since the initial creation will
3820                  * have been cleared and the NOT_IN_ASSOC flag will have
3821                  * been added... and we don't want to end up removing it
3822                  * back out.
3823                  */
3824                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3825                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3826                             SCTP_ADDR_UNCONFIRMED);
3827                 } else {
3828                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3829                 }
3830
3831                 return (0);
3832         }
3833         addr_inscope = 1;
3834         switch (newaddr->sa_family) {
3835 #ifdef INET
3836         case AF_INET:
3837                 {
3838                         struct sockaddr_in *sin;
3839
3840                         sin = (struct sockaddr_in *)newaddr;
3841                         if (sin->sin_addr.s_addr == 0) {
3842                                 /* Invalid address */
3843                                 return (-1);
3844                         }
3845                         /* zero out the bzero area */
3846                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3847
3848                         /* assure len is set */
3849                         sin->sin_len = sizeof(struct sockaddr_in);
3850                         if (set_scope) {
3851 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3852                                 stcb->ipv4_local_scope = 1;
3853 #else
3854                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3855                                         stcb->asoc.ipv4_local_scope = 1;
3856                                 }
3857 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3858                         } else {
3859                                 /* Validate the address is in scope */
3860                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3861                                     (stcb->asoc.ipv4_local_scope == 0)) {
3862                                         addr_inscope = 0;
3863                                 }
3864                         }
3865                         break;
3866                 }
3867 #endif
3868 #ifdef INET6
3869         case AF_INET6:
3870                 {
3871                         struct sockaddr_in6 *sin6;
3872
3873                         sin6 = (struct sockaddr_in6 *)newaddr;
3874                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3875                                 /* Invalid address */
3876                                 return (-1);
3877                         }
3878                         /* assure len is set */
3879                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3880                         if (set_scope) {
3881                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3882                                         stcb->asoc.loopback_scope = 1;
3883                                         stcb->asoc.local_scope = 0;
3884                                         stcb->asoc.ipv4_local_scope = 1;
3885                                         stcb->asoc.site_scope = 1;
3886                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3887                                         /*
3888                                          * If the new destination is a
3889                                          * LINK_LOCAL we must have common
3890                                          * site scope. Don't set the local
3891                                          * scope since we may not share all
3892                                          * links, only loopback can do this.
3893                                          * Links on the local network would
3894                                          * also be on our private network
3895                                          * for v4 too.
3896                                          */
3897                                         stcb->asoc.ipv4_local_scope = 1;
3898                                         stcb->asoc.site_scope = 1;
3899                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3900                                         /*
3901                                          * If the new destination is
3902                                          * SITE_LOCAL then we must have site
3903                                          * scope in common.
3904                                          */
3905                                         stcb->asoc.site_scope = 1;
3906                                 }
3907                         } else {
3908                                 /* Validate the address is in scope */
3909                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3910                                     (stcb->asoc.loopback_scope == 0)) {
3911                                         addr_inscope = 0;
3912                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3913                                     (stcb->asoc.local_scope == 0)) {
3914                                         addr_inscope = 0;
3915                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3916                                     (stcb->asoc.site_scope == 0)) {
3917                                         addr_inscope = 0;
3918                                 }
3919                         }
3920                         break;
3921                 }
3922 #endif
3923         default:
3924                 /* not supported family type */
3925                 return (-1);
3926         }
3927         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3928         if (net == NULL) {
3929                 return (-1);
3930         }
3931         SCTP_INCR_RADDR_COUNT();
3932         bzero(net, sizeof(struct sctp_nets));
3933         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3934         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3935         switch (newaddr->sa_family) {
3936 #ifdef INET
3937         case AF_INET:
3938                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3939                 break;
3940 #endif
3941 #ifdef INET6
3942         case AF_INET6:
3943                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3944                 break;
3945 #endif
3946         default:
3947                 break;
3948         }
3949         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3950         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3951                 stcb->asoc.loopback_scope = 1;
3952                 stcb->asoc.ipv4_local_scope = 1;
3953                 stcb->asoc.local_scope = 0;
3954                 stcb->asoc.site_scope = 1;
3955                 addr_inscope = 1;
3956         }
3957         net->failure_threshold = stcb->asoc.def_net_failure;
3958         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3959         if (addr_inscope == 0) {
3960                 net->dest_state = (SCTP_ADDR_REACHABLE |
3961                     SCTP_ADDR_OUT_OF_SCOPE);
3962         } else {
3963                 if (from == SCTP_ADDR_IS_CONFIRMED)
3964                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3965                         net->dest_state = SCTP_ADDR_REACHABLE;
3966                 else
3967                         net->dest_state = SCTP_ADDR_REACHABLE |
3968                             SCTP_ADDR_UNCONFIRMED;
3969         }
3970         /*
3971          * We set this to 0, the timer code knows that this means its an
3972          * initial value
3973          */
3974         net->rto_needed = 1;
3975         net->RTO = 0;
3976         net->RTO_measured = 0;
3977         stcb->asoc.numnets++;
3978         net->ref_count = 1;
3979         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3980         net->port = stcb->asoc.port;
3981         net->dscp = stcb->asoc.default_dscp;
3982 #ifdef INET6
3983         net->flowlabel = stcb->asoc.default_flowlabel;
3984 #endif
3985         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3986                 net->dest_state |= SCTP_ADDR_NOHB;
3987         } else {
3988                 net->dest_state &= ~SCTP_ADDR_NOHB;
3989         }
3990         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3991                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3992         } else {
3993                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3994         }
3995         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3996         /* Init the timer structure */
3997         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3998         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3999         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
4000
4001         /* Now generate a route for this guy */
4002 #ifdef INET6
4003         /* KAME hack: embed scopeid */
4004         if (newaddr->sa_family == AF_INET6) {
4005                 struct sockaddr_in6 *sin6;
4006
4007                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4008                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
4009                 sin6->sin6_scope_id = 0;
4010         }
4011 #endif
4012         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
4013
4014         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
4015                 /* Get source address */
4016                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
4017                     stcb,
4018                     (sctp_route_t *) & net->ro,
4019                     net,
4020                     0,
4021                     stcb->asoc.vrf_id);
4022                 /* Now get the interface MTU */
4023                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
4024                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
4025                 }
4026                 if (net->mtu > 0) {
4027                         uint32_t rmtu;
4028
4029                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
4030                         if (rmtu == 0) {
4031                                 /*
4032                                  * Start things off to match mtu of
4033                                  * interface please.
4034                                  */
4035                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
4036                                     net->ro.ro_rt, net->mtu);
4037                         } else {
4038                                 /*
4039                                  * we take the route mtu over the interface,
4040                                  * since the route may be leading out the
4041                                  * loopback, or a different interface.
4042                                  */
4043                                 net->mtu = rmtu;
4044                         }
4045                 }
4046         }
4047         if (net->mtu == 0) {
4048                 switch (newaddr->sa_family) {
4049 #ifdef INET
4050                 case AF_INET:
4051                         net->mtu = SCTP_DEFAULT_MTU;
4052                         break;
4053 #endif
4054 #ifdef INET6
4055                 case AF_INET6:
4056                         net->mtu = 1280;
4057                         break;
4058 #endif
4059                 default:
4060                         break;
4061                 }
4062         }
4063         if (net->port) {
4064                 net->mtu -= (uint32_t) sizeof(struct udphdr);
4065         }
4066         if (from == SCTP_ALLOC_ASOC) {
4067                 stcb->asoc.smallest_mtu = net->mtu;
4068         }
4069         if (stcb->asoc.smallest_mtu > net->mtu) {
4070                 stcb->asoc.smallest_mtu = net->mtu;
4071         }
4072 #ifdef INET6
4073         if (newaddr->sa_family == AF_INET6) {
4074                 struct sockaddr_in6 *sin6;
4075
4076                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4077                 (void)sa6_recoverscope(sin6);
4078         }
4079 #endif
4080
4081         /* JRS - Use the congestion control given in the CC module */
4082         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4083                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4084
4085         /*
4086          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4087          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4088          */
4089         net->find_pseudo_cumack = 1;
4090         net->find_rtx_pseudo_cumack = 1;
4091         net->src_addr_selected = 0;
4092         /* Choose an initial flowid. */
4093         net->flowid = stcb->asoc.my_vtag ^
4094             ntohs(stcb->rport) ^
4095             ntohs(stcb->sctp_ep->sctp_lport);
4096 #ifdef INVARIANTS
4097         net->flowidset = 1;
4098 #endif
4099         if (netp) {
4100                 *netp = net;
4101         }
4102         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4103         if (net->ro.ro_rt == NULL) {
4104                 /* Since we have no route put it at the back */
4105                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4106         } else if (netfirst == NULL) {
4107                 /* We are the first one in the pool. */
4108                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4109         } else if (netfirst->ro.ro_rt == NULL) {
4110                 /*
4111                  * First one has NO route. Place this one ahead of the first
4112                  * one.
4113                  */
4114                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4115         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4116                 /*
4117                  * This one has a different interface than the one at the
4118                  * top of the list. Place it ahead.
4119                  */
4120                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4121         } else {
4122                 /*
4123                  * Ok we have the same interface as the first one. Move
4124                  * forward until we find either a) one with a NULL route...
4125                  * insert ahead of that b) one with a different ifp.. insert
4126                  * after that. c) end of the list.. insert at the tail.
4127                  */
4128                 struct sctp_nets *netlook;
4129
4130                 do {
4131                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4132                         if (netlook == NULL) {
4133                                 /* End of the list */
4134                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4135                                 break;
4136                         } else if (netlook->ro.ro_rt == NULL) {
4137                                 /* next one has NO route */
4138                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4139                                 break;
4140                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4141                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4142                                     net, sctp_next);
4143                                 break;
4144                         }
4145                         /* Shift forward */
4146                         netfirst = netlook;
4147                 } while (netlook != NULL);
4148         }
4149
4150         /* got to have a primary set */
4151         if (stcb->asoc.primary_destination == 0) {
4152                 stcb->asoc.primary_destination = net;
4153         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4154                     (net->ro.ro_rt) &&
4155             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4156                 /* No route to current primary adopt new primary */
4157                 stcb->asoc.primary_destination = net;
4158         }
4159         /* Validate primary is first */
4160         net = TAILQ_FIRST(&stcb->asoc.nets);
4161         if ((net != stcb->asoc.primary_destination) &&
4162             (stcb->asoc.primary_destination)) {
4163                 /*
4164                  * first one on the list is NOT the primary sctp_cmpaddr()
4165                  * is much more efficient if the primary is the first on the
4166                  * list, make it so.
4167                  */
4168                 TAILQ_REMOVE(&stcb->asoc.nets,
4169                     stcb->asoc.primary_destination, sctp_next);
4170                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4171                     stcb->asoc.primary_destination, sctp_next);
4172         }
4173         return (0);
4174 }
4175
4176
4177 static uint32_t
4178 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4179 {
4180         uint32_t id;
4181         struct sctpasochead *head;
4182         struct sctp_tcb *lstcb;
4183
4184         SCTP_INP_WLOCK(inp);
4185 try_again:
4186         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4187                 /* TSNH */
4188                 SCTP_INP_WUNLOCK(inp);
4189                 return (0);
4190         }
4191         /*
4192          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4193          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4194          */
4195         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4196                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4197         }
4198         id = inp->sctp_associd_counter;
4199         inp->sctp_associd_counter++;
4200         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4201         if (lstcb) {
4202                 goto try_again;
4203         }
4204         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4205         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4206         stcb->asoc.in_asocid_hash = 1;
4207         SCTP_INP_WUNLOCK(inp);
4208         return id;
4209 }
4210
4211 /*
4212  * allocate an association and add it to the endpoint. The caller must be
4213  * careful to add all additional addresses once they are know right away or
4214  * else the assoc will be may experience a blackout scenario.
4215  */
4216 struct sctp_tcb *
4217 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4218     int *error, uint32_t override_tag, uint32_t vrf_id,
4219     struct thread *p
4220 )
4221 {
4222         /* note the p argument is only valid in unbound sockets */
4223
4224         struct sctp_tcb *stcb;
4225         struct sctp_association *asoc;
4226         struct sctpasochead *head;
4227         uint16_t rport;
4228         int err;
4229
4230         /*
4231          * Assumption made here: Caller has done a
4232          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4233          * address does not exist already.
4234          */
4235         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4236                 /* Hit max assoc, sorry no more */
4237                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4238                 *error = ENOBUFS;
4239                 return (NULL);
4240         }
4241         if (firstaddr == NULL) {
4242                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4243                 *error = EINVAL;
4244                 return (NULL);
4245         }
4246         SCTP_INP_RLOCK(inp);
4247         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4248             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4249             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4250                 /*
4251                  * If its in the TCP pool, its NOT allowed to create an
4252                  * association. The parent listener needs to call
4253                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4254                  * off, or connected one does this.. its an error.
4255                  */
4256                 SCTP_INP_RUNLOCK(inp);
4257                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4258                 *error = EINVAL;
4259                 return (NULL);
4260         }
4261         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4262             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4263                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4264                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4265                         SCTP_INP_RUNLOCK(inp);
4266                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4267                         *error = EINVAL;
4268                         return (NULL);
4269                 }
4270         }
4271         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4272 #ifdef SCTP_DEBUG
4273         if (firstaddr) {
4274                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4275                 switch (firstaddr->sa_family) {
4276 #ifdef INET
4277                 case AF_INET:
4278                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4279                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4280                         break;
4281 #endif
4282 #ifdef INET6
4283                 case AF_INET6:
4284                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4285                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4286                         break;
4287 #endif
4288                 default:
4289                         break;
4290                 }
4291         } else {
4292                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4293         }
4294 #endif                          /* SCTP_DEBUG */
4295         switch (firstaddr->sa_family) {
4296 #ifdef INET
4297         case AF_INET:
4298                 {
4299                         struct sockaddr_in *sin;
4300
4301                         sin = (struct sockaddr_in *)firstaddr;
4302                         if ((ntohs(sin->sin_port) == 0) ||
4303                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4304                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4305                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4306                                 /* Invalid address */
4307                                 SCTP_INP_RUNLOCK(inp);
4308                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4309                                 *error = EINVAL;
4310                                 return (NULL);
4311                         }
4312                         rport = sin->sin_port;
4313                         break;
4314                 }
4315 #endif
4316 #ifdef INET6
4317         case AF_INET6:
4318                 {
4319                         struct sockaddr_in6 *sin6;
4320
4321                         sin6 = (struct sockaddr_in6 *)firstaddr;
4322                         if ((ntohs(sin6->sin6_port) == 0) ||
4323                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4324                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4325                                 /* Invalid address */
4326                                 SCTP_INP_RUNLOCK(inp);
4327                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4328                                 *error = EINVAL;
4329                                 return (NULL);
4330                         }
4331                         rport = sin6->sin6_port;
4332                         break;
4333                 }
4334 #endif
4335         default:
4336                 /* not supported family type */
4337                 SCTP_INP_RUNLOCK(inp);
4338                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4339                 *error = EINVAL;
4340                 return (NULL);
4341         }
4342         SCTP_INP_RUNLOCK(inp);
4343         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4344                 /*
4345                  * If you have not performed a bind, then we need to do the
4346                  * ephemeral bind for you.
4347                  */
4348                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4349                     (struct sockaddr *)NULL,
4350                     (struct sctp_ifa *)NULL,
4351                     p
4352                     ))) {
4353                         /* bind error, probably perm */
4354                         *error = err;
4355                         return (NULL);
4356                 }
4357         }
4358         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4359         if (stcb == NULL) {
4360                 /* out of memory? */
4361                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4362                 *error = ENOMEM;
4363                 return (NULL);
4364         }
4365         SCTP_INCR_ASOC_COUNT();
4366
4367         bzero(stcb, sizeof(*stcb));
4368         asoc = &stcb->asoc;
4369
4370         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4371         SCTP_TCB_LOCK_INIT(stcb);
4372         SCTP_TCB_SEND_LOCK_INIT(stcb);
4373         stcb->rport = rport;
4374         /* setup back pointer's */
4375         stcb->sctp_ep = inp;
4376         stcb->sctp_socket = inp->sctp_socket;
4377         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4378                 /* failed */
4379                 SCTP_TCB_LOCK_DESTROY(stcb);
4380                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4381                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4382                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4383                 SCTP_DECR_ASOC_COUNT();
4384                 *error = err;
4385                 return (NULL);
4386         }
4387         /* and the port */
4388         SCTP_INP_INFO_WLOCK();
4389         SCTP_INP_WLOCK(inp);
4390         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4391                 /* inpcb freed while alloc going on */
4392                 SCTP_TCB_LOCK_DESTROY(stcb);
4393                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4394                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4395                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4396                 SCTP_INP_WUNLOCK(inp);
4397                 SCTP_INP_INFO_WUNLOCK();
4398                 SCTP_DECR_ASOC_COUNT();
4399                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4400                 *error = EINVAL;
4401                 return (NULL);
4402         }
4403         SCTP_TCB_LOCK(stcb);
4404
4405         /* now that my_vtag is set, add it to the hash */
4406         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4407         /* put it in the bucket in the vtag hash of assoc's for the system */
4408         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4409         SCTP_INP_INFO_WUNLOCK();
4410
4411         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4412                 /* failure.. memory error? */
4413                 if (asoc->strmout) {
4414                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4415                         asoc->strmout = NULL;
4416                 }
4417                 if (asoc->mapping_array) {
4418                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4419                         asoc->mapping_array = NULL;
4420                 }
4421                 if (asoc->nr_mapping_array) {
4422                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4423                         asoc->nr_mapping_array = NULL;
4424                 }
4425                 SCTP_DECR_ASOC_COUNT();
4426                 SCTP_TCB_LOCK_DESTROY(stcb);
4427                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4428                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4429                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4430                 SCTP_INP_WUNLOCK(inp);
4431                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4432                 *error = ENOBUFS;
4433                 return (NULL);
4434         }
4435         /* Init all the timers */
4436         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4437         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4438         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4439         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4440         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4441         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4442         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4443
4444         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4445         /* now file the port under the hash as well */
4446         if (inp->sctp_tcbhash != NULL) {
4447                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4448                     inp->sctp_hashmark)];
4449                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4450         }
4451         SCTP_INP_WUNLOCK(inp);
4452         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
4453         return (stcb);
4454 }
4455
4456
4457 void
4458 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4459 {
4460         struct sctp_association *asoc;
4461
4462         asoc = &stcb->asoc;
4463         asoc->numnets--;
4464         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4465         if (net == asoc->primary_destination) {
4466                 /* Reset primary */
4467                 struct sctp_nets *lnet;
4468
4469                 lnet = TAILQ_FIRST(&asoc->nets);
4470                 /*
4471                  * Mobility adaptation Ideally, if deleted destination is
4472                  * the primary, it becomes a fast retransmission trigger by
4473                  * the subsequent SET PRIMARY. (by micchie)
4474                  */
4475                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4476                     SCTP_MOBILITY_BASE) ||
4477                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4478                     SCTP_MOBILITY_FASTHANDOFF)) {
4479                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4480                         if (asoc->deleted_primary != NULL) {
4481                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4482                                 goto out;
4483                         }
4484                         asoc->deleted_primary = net;
4485                         atomic_add_int(&net->ref_count, 1);
4486                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4487                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4488                         sctp_mobility_feature_on(stcb->sctp_ep,
4489                             SCTP_MOBILITY_PRIM_DELETED);
4490                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4491                             stcb->sctp_ep, stcb, NULL);
4492                 }
4493 out:
4494                 /* Try to find a confirmed primary */
4495                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4496         }
4497         if (net == asoc->last_data_chunk_from) {
4498                 /* Reset primary */
4499                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4500         }
4501         if (net == asoc->last_control_chunk_from) {
4502                 /* Clear net */
4503                 asoc->last_control_chunk_from = NULL;
4504         }
4505         if (net == stcb->asoc.alternate) {
4506                 sctp_free_remote_addr(stcb->asoc.alternate);
4507                 stcb->asoc.alternate = NULL;
4508         }
4509         sctp_free_remote_addr(net);
4510 }
4511
4512 /*
4513  * remove a remote endpoint address from an association, it will fail if the
4514  * address does not exist.
4515  */
4516 int
4517 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4518 {
4519         /*
4520          * Here we need to remove a remote address. This is quite simple, we
4521          * first find it in the list of address for the association
4522          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4523          * on that item. Note we do not allow it to be removed if there are
4524          * no other addresses.
4525          */
4526         struct sctp_association *asoc;
4527         struct sctp_nets *net, *nnet;
4528
4529         asoc = &stcb->asoc;
4530
4531         /* locate the address */
4532         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4533                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4534                         continue;
4535                 }
4536                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4537                     remaddr)) {
4538                         /* we found the guy */
4539                         if (asoc->numnets < 2) {
4540                                 /* Must have at LEAST two remote addresses */
4541                                 return (-1);
4542                         } else {
4543                                 sctp_remove_net(stcb, net);
4544                                 return (0);
4545                         }
4546                 }
4547         }
4548         /* not found. */
4549         return (-2);
4550 }
4551
4552 void
4553 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4554 {
4555         struct sctpvtaghead *chain;
4556         struct sctp_tagblock *twait_block;
4557         int found = 0;
4558         int i;
4559
4560         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4561         if (!LIST_EMPTY(chain)) {
4562                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4563                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4564                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4565                                     (twait_block->vtag_block[i].lport == lport) &&
4566                                     (twait_block->vtag_block[i].rport == rport)) {
4567                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4568                                         twait_block->vtag_block[i].v_tag = 0;
4569                                         twait_block->vtag_block[i].lport = 0;
4570                                         twait_block->vtag_block[i].rport = 0;
4571                                         found = 1;
4572                                         break;
4573                                 }
4574                         }
4575                         if (found)
4576                                 break;
4577                 }
4578         }
4579 }
4580
4581 int
4582 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4583 {
4584         struct sctpvtaghead *chain;
4585         struct sctp_tagblock *twait_block;
4586         int found = 0;
4587         int i;
4588
4589         SCTP_INP_INFO_WLOCK();
4590         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4591         if (!LIST_EMPTY(chain)) {
4592                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4593                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4594                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4595                                     (twait_block->vtag_block[i].lport == lport) &&
4596                                     (twait_block->vtag_block[i].rport == rport)) {
4597                                         found = 1;
4598                                         break;
4599                                 }
4600                         }
4601                         if (found)
4602                                 break;
4603                 }
4604         }
4605         SCTP_INP_INFO_WUNLOCK();
4606         return (found);
4607 }
4608
4609
4610 void
4611 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4612 {
4613         struct sctpvtaghead *chain;
4614         struct sctp_tagblock *twait_block;
4615         struct timeval now;
4616         int set, i;
4617
4618         if (time == 0) {
4619                 /* Its disabled */
4620                 return;
4621         }
4622         (void)SCTP_GETTIME_TIMEVAL(&now);
4623         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4624         set = 0;
4625         if (!LIST_EMPTY(chain)) {
4626                 /* Block(s) present, lets find space, and expire on the fly */
4627                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4628                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4629                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
4630                                     !set) {
4631                                         twait_block->vtag_block[i].tv_sec_at_expire =
4632                                             now.tv_sec + time;
4633                                         twait_block->vtag_block[i].v_tag = tag;
4634                                         twait_block->vtag_block[i].lport = lport;
4635                                         twait_block->vtag_block[i].rport = rport;
4636                                         set = 1;
4637                                 } else if ((twait_block->vtag_block[i].v_tag) &&
4638                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4639                                         /* Audit expires this guy */
4640                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4641                                         twait_block->vtag_block[i].v_tag = 0;
4642                                         twait_block->vtag_block[i].lport = 0;
4643                                         twait_block->vtag_block[i].rport = 0;
4644                                         if (set == 0) {
4645                                                 /* Reuse it for my new tag */
4646                                                 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4647                                                 twait_block->vtag_block[i].v_tag = tag;
4648                                                 twait_block->vtag_block[i].lport = lport;
4649                                                 twait_block->vtag_block[i].rport = rport;
4650                                                 set = 1;
4651                                         }
4652                                 }
4653                         }
4654                         if (set) {
4655                                 /*
4656                                  * We only do up to the block where we can
4657                                  * place our tag for audits
4658                                  */
4659                                 break;
4660                         }
4661                 }
4662         }
4663         /* Need to add a new block to chain */
4664         if (!set) {
4665                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4666                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4667                 if (twait_block == NULL) {
4668 #ifdef INVARIANTS
4669                         panic("Can not alloc tagblock");
4670 #endif
4671                         return;
4672                 }
4673                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4674                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4675                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4676                 twait_block->vtag_block[0].v_tag = tag;
4677                 twait_block->vtag_block[0].lport = lport;
4678                 twait_block->vtag_block[0].rport = rport;
4679         }
4680 }
4681
4682
4683
4684 /*-
4685  * Free the association after un-hashing the remote port. This
4686  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4687  * expect that the input to this function IS a locked TCB.
4688  * It will return 0, if it did NOT destroy the association (instead
4689  * it unlocks it. It will return NON-zero if it either destroyed the
4690  * association OR the association is already destroyed.
4691  */
4692 int
4693 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4694 {
4695         int i;
4696         struct sctp_association *asoc;
4697         struct sctp_nets *net, *nnet;
4698         struct sctp_laddr *laddr, *naddr;
4699         struct sctp_tmit_chunk *chk, *nchk;
4700         struct sctp_asconf_addr *aparam, *naparam;
4701         struct sctp_asconf_ack *aack, *naack;
4702         struct sctp_stream_reset_list *strrst, *nstrrst;
4703         struct sctp_queued_to_read *sq, *nsq;
4704         struct sctp_stream_queue_pending *sp, *nsp;
4705         sctp_sharedkey_t *shared_key, *nshared_key;
4706         struct socket *so;
4707
4708         /* first, lets purge the entry from the hash table. */
4709
4710 #ifdef SCTP_LOG_CLOSING
4711         sctp_log_closing(inp, stcb, 6);
4712 #endif
4713         if (stcb->asoc.state == 0) {
4714 #ifdef SCTP_LOG_CLOSING
4715                 sctp_log_closing(inp, NULL, 7);
4716 #endif
4717                 /* there is no asoc, really TSNH :-0 */
4718                 return (1);
4719         }
4720         if (stcb->asoc.alternate) {
4721                 sctp_free_remote_addr(stcb->asoc.alternate);
4722                 stcb->asoc.alternate = NULL;
4723         }
4724         /* TEMP CODE */
4725         if (stcb->freed_from_where == 0) {
4726                 /* Only record the first place free happened from */
4727                 stcb->freed_from_where = from_location;
4728         }
4729         /* TEMP CODE */
4730
4731         asoc = &stcb->asoc;
4732         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4733             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4734                 /* nothing around */
4735                 so = NULL;
4736         else
4737                 so = inp->sctp_socket;
4738
4739         /*
4740          * We used timer based freeing if a reader or writer is in the way.
4741          * So we first check if we are actually being called from a timer,
4742          * if so we abort early if a reader or writer is still in the way.
4743          */
4744         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4745             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4746                 /*
4747                  * is it the timer driving us? if so are the reader/writers
4748                  * gone?
4749                  */
4750                 if (stcb->asoc.refcnt) {
4751                         /* nope, reader or writer in the way */
4752                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4753                         /* no asoc destroyed */
4754                         SCTP_TCB_UNLOCK(stcb);
4755 #ifdef SCTP_LOG_CLOSING
4756                         sctp_log_closing(inp, stcb, 8);
4757 #endif
4758                         return (0);
4759                 }
4760         }
4761         /* now clean up any other timers */
4762         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4763         asoc->dack_timer.self = NULL;
4764         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4765         /*-
4766          * For stream reset we don't blast this unless
4767          * it is a str-reset timer, it might be the
4768          * free-asoc timer which we DON'T want to
4769          * disturb.
4770          */
4771         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4772                 asoc->strreset_timer.self = NULL;
4773         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4774         asoc->asconf_timer.self = NULL;
4775         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4776         asoc->autoclose_timer.self = NULL;
4777         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4778         asoc->shut_guard_timer.self = NULL;
4779         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4780         asoc->delayed_event_timer.self = NULL;
4781         /* Mobility adaptation */
4782         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4783         asoc->delete_prim_timer.self = NULL;
4784         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4785                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4786                 net->rxt_timer.self = NULL;
4787                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4788                 net->pmtu_timer.self = NULL;
4789                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4790                 net->hb_timer.self = NULL;
4791         }
4792         /* Now the read queue needs to be cleaned up (only once) */
4793         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4794                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4795                 SCTP_INP_READ_LOCK(inp);
4796                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4797                         if (sq->stcb == stcb) {
4798                                 sq->do_not_ref_stcb = 1;
4799                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4800                                 /*
4801                                  * If there is no end, there never will be
4802                                  * now.
4803                                  */
4804                                 if (sq->end_added == 0) {
4805                                         /* Held for PD-API clear that. */
4806                                         sq->pdapi_aborted = 1;
4807                                         sq->held_length = 0;
4808                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4809                                                 /*
4810                                                  * Need to add a PD-API
4811                                                  * aborted indication.
4812                                                  * Setting the control_pdapi
4813                                                  * assures that it will be
4814                                                  * added right after this
4815                                                  * msg.
4816                                                  */
4817                                                 uint32_t strseq;
4818
4819                                                 stcb->asoc.control_pdapi = sq;
4820                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4821                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4822                                                     stcb,
4823                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4824                                                     (void *)&strseq,
4825                                                     SCTP_SO_LOCKED);
4826                                                 stcb->asoc.control_pdapi = NULL;
4827                                         }
4828                                 }
4829                                 /* Add an end to wake them */
4830                                 sq->end_added = 1;
4831                         }
4832                 }
4833                 SCTP_INP_READ_UNLOCK(inp);
4834                 if (stcb->block_entry) {
4835                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4836                         stcb->block_entry->error = ECONNRESET;
4837                         stcb->block_entry = NULL;
4838                 }
4839         }
4840         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4841                 /*
4842                  * Someone holds a reference OR the socket is unaccepted
4843                  * yet.
4844                  */
4845                 if ((stcb->asoc.refcnt) ||
4846                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4847                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4848                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4849                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4850                 }
4851                 SCTP_TCB_UNLOCK(stcb);
4852                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4853                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4854                         /* nothing around */
4855                         so = NULL;
4856                 if (so) {
4857                         /* Wake any reader/writers */
4858                         sctp_sorwakeup(inp, so);
4859                         sctp_sowwakeup(inp, so);
4860                 }
4861 #ifdef SCTP_LOG_CLOSING
4862                 sctp_log_closing(inp, stcb, 9);
4863 #endif
4864                 /* no asoc destroyed */
4865                 return (0);
4866         }
4867 #ifdef SCTP_LOG_CLOSING
4868         sctp_log_closing(inp, stcb, 10);
4869 #endif
4870         /*
4871          * When I reach here, no others want to kill the assoc yet.. and I
4872          * own the lock. Now its possible an abort comes in when I do the
4873          * lock exchange below to grab all the locks to do the final take
4874          * out. to prevent this we increment the count, which will start a
4875          * timer and blow out above thus assuring us that we hold exclusive
4876          * killing of the asoc. Note that after getting back the TCB lock we
4877          * will go ahead and increment the counter back up and stop any
4878          * timer a passing stranger may have started :-S
4879          */
4880         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4881                 atomic_add_int(&stcb->asoc.refcnt, 1);
4882
4883                 SCTP_TCB_UNLOCK(stcb);
4884                 SCTP_INP_INFO_WLOCK();
4885                 SCTP_INP_WLOCK(inp);
4886                 SCTP_TCB_LOCK(stcb);
4887         }
4888         /* Double check the GONE flag */
4889         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4890             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4891                 /* nothing around */
4892                 so = NULL;
4893
4894         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4895             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4896                 /*
4897                  * For TCP type we need special handling when we are
4898                  * connected. We also include the peel'ed off ones to.
4899                  */
4900                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4901                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4902                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4903                         if (so) {
4904                                 SOCK_LOCK(so);
4905                                 if (so->so_rcv.sb_cc == 0) {
4906                                         so->so_state &= ~(SS_ISCONNECTING |
4907                                             SS_ISDISCONNECTING |
4908                                             SS_ISCONFIRMING |
4909                                             SS_ISCONNECTED);
4910                                 }
4911                                 socantrcvmore_locked(so);
4912                                 sctp_sowwakeup(inp, so);
4913                                 sctp_sorwakeup(inp, so);
4914                                 SCTP_SOWAKEUP(so);
4915                         }
4916                 }
4917         }
4918         /*
4919          * Make it invalid too, that way if its about to run it will abort
4920          * and return.
4921          */
4922         /* re-increment the lock */
4923         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4924                 atomic_add_int(&stcb->asoc.refcnt, -1);
4925         }
4926         if (stcb->asoc.refcnt) {
4927                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4928                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4929                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4930                         SCTP_INP_INFO_WUNLOCK();
4931                         SCTP_INP_WUNLOCK(inp);
4932                 }
4933                 SCTP_TCB_UNLOCK(stcb);
4934                 return (0);
4935         }
4936         asoc->state = 0;
4937         if (inp->sctp_tcbhash) {
4938                 LIST_REMOVE(stcb, sctp_tcbhash);
4939         }
4940         if (stcb->asoc.in_asocid_hash) {
4941                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4942         }
4943         /* Now lets remove it from the list of ALL associations in the EP */
4944         LIST_REMOVE(stcb, sctp_tcblist);
4945         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4946                 SCTP_INP_INCR_REF(inp);
4947                 SCTP_INP_WUNLOCK(inp);
4948         }
4949         /* pull from vtag hash */
4950         LIST_REMOVE(stcb, sctp_asocs);
4951         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4952             inp->sctp_lport, stcb->rport);
4953
4954         /*
4955          * Now restop the timers to be sure this is paranoia at is finest!
4956          */
4957         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4958         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4959         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4960         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4961         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4962         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4963         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4964         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4965                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4966                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4967                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4968         }
4969
4970         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4971         /*
4972          * The chunk lists and such SHOULD be empty but we check them just
4973          * in case.
4974          */
4975         /* anything on the wheel needs to be removed */
4976         for (i = 0; i < asoc->streamoutcnt; i++) {
4977                 struct sctp_stream_out *outs;
4978
4979                 outs = &asoc->strmout[i];
4980                 /* now clean up any chunks here */
4981                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4982                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4983                         if (sp->data) {
4984                                 if (so) {
4985                                         /* Still an open socket - report */
4986                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4987                                             0, (void *)sp, SCTP_SO_LOCKED);
4988                                 }
4989                                 if (sp->data) {
4990                                         sctp_m_freem(sp->data);
4991                                         sp->data = NULL;
4992                                         sp->tail_mbuf = NULL;
4993                                 }
4994                         }
4995                         if (sp->net) {
4996                                 sctp_free_remote_addr(sp->net);
4997                                 sp->net = NULL;
4998                         }
4999                         sctp_free_spbufspace(stcb, asoc, sp);
5000                         if (sp->holds_key_ref)
5001                                 sctp_auth_key_release(stcb, sp->auth_keyid, SCTP_SO_LOCKED);
5002                         /* Free the zone stuff  */
5003                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp);
5004                         SCTP_DECR_STRMOQ_COUNT();
5005                         /* sa_ignore FREED_MEMORY */
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         case AF_INET6:
5308                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5309                 break;
5310         case AF_INET:
5311                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5312                 break;
5313         default:
5314                 /* invalid family, so it's unreachable */
5315                 answer = 0;
5316                 break;
5317         }
5318         return (answer);
5319 }
5320
5321 /*
5322  * update the inp_vflags on an endpoint
5323  */
5324 static void
5325 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5326 {
5327         struct sctp_laddr *laddr;
5328
5329         /* first clear the flag */
5330         inp->ip_inp.inp.inp_vflag = 0;
5331         /* set the flag based on addresses on the ep list */
5332         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5333                 if (laddr->ifa == NULL) {
5334                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5335                             __FUNCTION__);
5336                         continue;
5337                 }
5338                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5339                         continue;
5340                 }
5341                 switch (laddr->ifa->address.sa.sa_family) {
5342 #ifdef INET6
5343                 case AF_INET6:
5344                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5345                         break;
5346 #endif
5347 #ifdef INET
5348                 case AF_INET:
5349                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5350                         break;
5351 #endif
5352                 default:
5353                         break;
5354                 }
5355         }
5356 }
5357
5358 /*
5359  * Add the address to the endpoint local address list There is nothing to be
5360  * done if we are bound to all addresses
5361  */
5362 void
5363 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5364 {
5365         struct sctp_laddr *laddr;
5366         int fnd, error = 0;
5367
5368         fnd = 0;
5369
5370         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5371                 /* You are already bound to all. You have it already */
5372                 return;
5373         }
5374 #ifdef INET6
5375         if (ifa->address.sa.sa_family == AF_INET6) {
5376                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5377                         /* Can't bind a non-useable addr. */
5378                         return;
5379                 }
5380         }
5381 #endif
5382         /* first, is it already present? */
5383         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5384                 if (laddr->ifa == ifa) {
5385                         fnd = 1;
5386                         break;
5387                 }
5388         }
5389
5390         if (fnd == 0) {
5391                 /* Not in the ep list */
5392                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5393                 if (error != 0)
5394                         return;
5395                 inp->laddr_count++;
5396                 /* update inp_vflag flags */
5397                 switch (ifa->address.sa.sa_family) {
5398 #ifdef INET6
5399                 case AF_INET6:
5400                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5401                         break;
5402 #endif
5403 #ifdef INET6
5404                 case AF_INET:
5405                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5406                         break;
5407 #endif
5408                 default:
5409                         break;
5410                 }
5411         }
5412         return;
5413 }
5414
5415
5416 /*
5417  * select a new (hopefully reachable) destination net (should only be used
5418  * when we deleted an ep addr that is the only usable source address to reach
5419  * the destination net)
5420  */
5421 static void
5422 sctp_select_primary_destination(struct sctp_tcb *stcb)
5423 {
5424         struct sctp_nets *net;
5425
5426         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5427                 /* for now, we'll just pick the first reachable one we find */
5428                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5429                         continue;
5430                 if (sctp_destination_is_reachable(stcb,
5431                     (struct sockaddr *)&net->ro._l_addr)) {
5432                         /* found a reachable destination */
5433                         stcb->asoc.primary_destination = net;
5434                 }
5435         }
5436         /* I can't there from here! ...we're gonna die shortly... */
5437 }
5438
5439
5440 /*
5441  * Delete the address from the endpoint local address list There is nothing
5442  * to be done if we are bound to all addresses
5443  */
5444 void
5445 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5446 {
5447         struct sctp_laddr *laddr;
5448         int fnd;
5449
5450         fnd = 0;
5451         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5452                 /* You are already bound to all. You have it already */
5453                 return;
5454         }
5455         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5456                 if (laddr->ifa == ifa) {
5457                         fnd = 1;
5458                         break;
5459                 }
5460         }
5461         if (fnd && (inp->laddr_count < 2)) {
5462                 /* can't delete unless there are at LEAST 2 addresses */
5463                 return;
5464         }
5465         if (fnd) {
5466                 /*
5467                  * clean up any use of this address go through our
5468                  * associations and clear any last_used_address that match
5469                  * this one for each assoc, see if a new primary_destination
5470                  * is needed
5471                  */
5472                 struct sctp_tcb *stcb;
5473
5474                 /* clean up "next_addr_touse" */
5475                 if (inp->next_addr_touse == laddr)
5476                         /* delete this address */
5477                         inp->next_addr_touse = NULL;
5478
5479                 /* clean up "last_used_address" */
5480                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5481                         struct sctp_nets *net;
5482
5483                         SCTP_TCB_LOCK(stcb);
5484                         if (stcb->asoc.last_used_address == laddr)
5485                                 /* delete this address */
5486                                 stcb->asoc.last_used_address = NULL;
5487                         /*
5488                          * Now spin through all the nets and purge any ref
5489                          * to laddr
5490                          */
5491                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5492                                 if (net->ro._s_addr &&
5493                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5494                                         /* Yep, purge src address selected */
5495                                         sctp_rtentry_t *rt;
5496
5497                                         /* delete this address if cached */
5498                                         rt = net->ro.ro_rt;
5499                                         if (rt != NULL) {
5500                                                 RTFREE(rt);
5501                                                 net->ro.ro_rt = NULL;
5502                                         }
5503                                         sctp_free_ifa(net->ro._s_addr);
5504                                         net->ro._s_addr = NULL;
5505                                         net->src_addr_selected = 0;
5506                                 }
5507                         }
5508                         SCTP_TCB_UNLOCK(stcb);
5509                 }               /* for each tcb */
5510                 /* remove it from the ep list */
5511                 sctp_remove_laddr(laddr);
5512                 inp->laddr_count--;
5513                 /* update inp_vflag flags */
5514                 sctp_update_ep_vflag(inp);
5515         }
5516         return;
5517 }
5518
5519 /*
5520  * Add the address to the TCB local address restricted list.
5521  * This is a "pending" address list (eg. addresses waiting for an
5522  * ASCONF-ACK response) and cannot be used as a valid source address.
5523  */
5524 void
5525 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5526 {
5527         struct sctp_laddr *laddr;
5528         struct sctpladdr *list;
5529
5530         /*
5531          * Assumes TCB is locked.. and possibly the INP. May need to
5532          * confirm/fix that if we need it and is not the case.
5533          */
5534         list = &stcb->asoc.sctp_restricted_addrs;
5535
5536 #ifdef INET6
5537         if (ifa->address.sa.sa_family == AF_INET6) {
5538                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5539                         /* Can't bind a non-existent addr. */
5540                         return;
5541                 }
5542         }
5543 #endif
5544         /* does the address already exist? */
5545         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5546                 if (laddr->ifa == ifa) {
5547                         return;
5548                 }
5549         }
5550
5551         /* add to the list */
5552         (void)sctp_insert_laddr(list, ifa, 0);
5553         return;
5554 }
5555
5556 /*
5557  * insert an laddr entry with the given ifa for the desired list
5558  */
5559 int
5560 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5561 {
5562         struct sctp_laddr *laddr;
5563
5564         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5565         if (laddr == NULL) {
5566                 /* out of memory? */
5567                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5568                 return (EINVAL);
5569         }
5570         SCTP_INCR_LADDR_COUNT();
5571         bzero(laddr, sizeof(*laddr));
5572         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5573         laddr->ifa = ifa;
5574         laddr->action = act;
5575         atomic_add_int(&ifa->refcount, 1);
5576         /* insert it */
5577         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5578
5579         return (0);
5580 }
5581
5582 /*
5583  * Remove an laddr entry from the local address list (on an assoc)
5584  */
5585 void
5586 sctp_remove_laddr(struct sctp_laddr *laddr)
5587 {
5588
5589         /* remove from the list */
5590         LIST_REMOVE(laddr, sctp_nxt_addr);
5591         sctp_free_ifa(laddr->ifa);
5592         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5593         SCTP_DECR_LADDR_COUNT();
5594 }
5595
5596 /*
5597  * Remove a local address from the TCB local address restricted list
5598  */
5599 void
5600 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5601 {
5602         struct sctp_inpcb *inp;
5603         struct sctp_laddr *laddr;
5604
5605         /*
5606          * This is called by asconf work. It is assumed that a) The TCB is
5607          * locked and b) The INP is locked. This is true in as much as I can
5608          * trace through the entry asconf code where I did these locks.
5609          * Again, the ASCONF code is a bit different in that it does lock
5610          * the INP during its work often times. This must be since we don't
5611          * want other proc's looking up things while what they are looking
5612          * up is changing :-D
5613          */
5614
5615         inp = stcb->sctp_ep;
5616         /* if subset bound and don't allow ASCONF's, can't delete last */
5617         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5618             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5619                 if (stcb->sctp_ep->laddr_count < 2) {
5620                         /* can't delete last address */
5621                         return;
5622                 }
5623         }
5624         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5625                 /* remove the address if it exists */
5626                 if (laddr->ifa == NULL)
5627                         continue;
5628                 if (laddr->ifa == ifa) {
5629                         sctp_remove_laddr(laddr);
5630                         return;
5631                 }
5632         }
5633
5634         /* address not found! */
5635         return;
5636 }
5637
5638 /*
5639  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5640  */
5641 /* sysctl */
5642 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5643 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5644
5645
5646
5647 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5648 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5649 int *sctp_cpuarry = NULL;
5650 void
5651 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5652 {
5653         /* Queue a packet to a processor for the specified core */
5654         struct sctp_mcore_queue *qent;
5655         struct sctp_mcore_ctrl *wkq;
5656         int need_wake = 0;
5657
5658         if (sctp_mcore_workers == NULL) {
5659                 /* Something went way bad during setup */
5660                 sctp_input_with_port(m, off, 0);
5661                 return;
5662         }
5663         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5664             (sizeof(struct sctp_mcore_queue)),
5665             SCTP_M_MCORE);
5666         if (qent == NULL) {
5667                 /* This is trouble  */
5668                 sctp_input_with_port(m, off, 0);
5669                 return;
5670         }
5671         qent->vn = curvnet;
5672         qent->m = m;
5673         qent->off = off;
5674         qent->v6 = 0;
5675         wkq = &sctp_mcore_workers[cpu_to_use];
5676         SCTP_MCORE_QLOCK(wkq);
5677
5678         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5679         if (wkq->running == 0) {
5680                 need_wake = 1;
5681         }
5682         SCTP_MCORE_QUNLOCK(wkq);
5683         if (need_wake) {
5684                 wakeup(&wkq->running);
5685         }
5686 }
5687
5688 static void
5689 sctp_mcore_thread(void *arg)
5690 {
5691
5692         struct sctp_mcore_ctrl *wkq;
5693         struct sctp_mcore_queue *qent;
5694
5695         wkq = (struct sctp_mcore_ctrl *)arg;
5696         struct mbuf *m;
5697         int off, v6;
5698
5699         /* Wait for first tickle */
5700         SCTP_MCORE_LOCK(wkq);
5701         wkq->running = 0;
5702         msleep(&wkq->running,
5703             &wkq->core_mtx,
5704             0, "wait for pkt", 0);
5705         SCTP_MCORE_UNLOCK(wkq);
5706
5707         /* Bind to our cpu */
5708         thread_lock(curthread);
5709         sched_bind(curthread, wkq->cpuid);
5710         thread_unlock(curthread);
5711
5712         /* Now lets start working */
5713         SCTP_MCORE_LOCK(wkq);
5714         /* Now grab lock and go */
5715         for (;;) {
5716                 SCTP_MCORE_QLOCK(wkq);
5717 skip_sleep:
5718                 wkq->running = 1;
5719                 qent = TAILQ_FIRST(&wkq->que);
5720                 if (qent) {
5721                         TAILQ_REMOVE(&wkq->que, qent, next);
5722                         SCTP_MCORE_QUNLOCK(wkq);
5723                         CURVNET_SET(qent->vn);
5724                         m = qent->m;
5725                         off = qent->off;
5726                         v6 = qent->v6;
5727                         SCTP_FREE(qent, SCTP_M_MCORE);
5728                         if (v6 == 0) {
5729                                 sctp_input_with_port(m, off, 0);
5730                         } else {
5731                                 SCTP_PRINTF("V6 not yet supported\n");
5732                                 sctp_m_freem(m);
5733                         }
5734                         CURVNET_RESTORE();
5735                         SCTP_MCORE_QLOCK(wkq);
5736                 }
5737                 wkq->running = 0;
5738                 if (!TAILQ_EMPTY(&wkq->que)) {
5739                         goto skip_sleep;
5740                 }
5741                 SCTP_MCORE_QUNLOCK(wkq);
5742                 msleep(&wkq->running,
5743                     &wkq->core_mtx,
5744                     0, "wait for pkt", 0);
5745         }
5746 }
5747
5748 static void
5749 sctp_startup_mcore_threads(void)
5750 {
5751         int i, cpu;
5752
5753         if (mp_ncpus == 1)
5754                 return;
5755
5756         if (sctp_mcore_workers != NULL) {
5757                 /*
5758                  * Already been here in some previous vnet?
5759                  */
5760                 return;
5761         }
5762         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5763             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5764             SCTP_M_MCORE);
5765         if (sctp_mcore_workers == NULL) {
5766                 /* TSNH I hope */
5767                 return;
5768         }
5769         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5770             sizeof(struct sctp_mcore_ctrl)));
5771         /* Init the structures */
5772         for (i = 0; i <= mp_maxid; i++) {
5773                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5774                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5775                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5776                 sctp_mcore_workers[i].cpuid = i;
5777         }
5778         if (sctp_cpuarry == NULL) {
5779                 SCTP_MALLOC(sctp_cpuarry, int *,
5780                     (mp_ncpus * sizeof(int)),
5781                     SCTP_M_MCORE);
5782                 i = 0;
5783                 CPU_FOREACH(cpu) {
5784                         sctp_cpuarry[i] = cpu;
5785                         i++;
5786                 }
5787         }
5788         /* Now start them all */
5789         CPU_FOREACH(cpu) {
5790                 (void)kproc_create(sctp_mcore_thread,
5791                     (void *)&sctp_mcore_workers[cpu],
5792                     &sctp_mcore_workers[cpu].thread_proc,
5793                     RFPROC,
5794                     SCTP_KTHREAD_PAGES,
5795                     SCTP_MCORE_NAME);
5796
5797         }
5798 }
5799
5800 #endif
5801
5802 void
5803 sctp_pcb_init()
5804 {
5805         /*
5806          * SCTP initialization for the PCB structures should be called by
5807          * the sctp_init() funciton.
5808          */
5809         int i;
5810         struct timeval tv;
5811
5812         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5813                 /* error I was called twice */
5814                 return;
5815         }
5816         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5817
5818 #if defined(SCTP_LOCAL_TRACE_BUF)
5819         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5820 #endif
5821 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5822         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5823             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5824             SCTP_M_MCORE);
5825 #endif
5826         (void)SCTP_GETTIME_TIMEVAL(&tv);
5827 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5828         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5829         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5830         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5831 #else
5832         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5833         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5834         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5835 #endif
5836         /* init the empty list of (All) Endpoints */
5837         LIST_INIT(&SCTP_BASE_INFO(listhead));
5838
5839
5840         /* init the hash table of endpoints */
5841         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5842         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5843         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5844         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5845             &SCTP_BASE_INFO(hashasocmark));
5846         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5847             &SCTP_BASE_INFO(hashmark));
5848         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5849             &SCTP_BASE_INFO(hashtcpmark));
5850         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5851
5852
5853         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5854             &SCTP_BASE_INFO(hashvrfmark));
5855
5856         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5857             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5858         /* init the zones */
5859         /*
5860          * FIX ME: Should check for NULL returns, but if it does fail we are
5861          * doomed to panic anyways... add later maybe.
5862          */
5863         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5864             sizeof(struct sctp_inpcb), maxsockets);
5865
5866         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5867             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5868
5869         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5870             sizeof(struct sctp_laddr),
5871             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5872
5873         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5874             sizeof(struct sctp_nets),
5875             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5876
5877         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5878             sizeof(struct sctp_tmit_chunk),
5879             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5880
5881         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5882             sizeof(struct sctp_queued_to_read),
5883             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5884
5885         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5886             sizeof(struct sctp_stream_queue_pending),
5887             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5888
5889         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5890             sizeof(struct sctp_asconf),
5891             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5892
5893         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5894             sizeof(struct sctp_asconf_ack),
5895             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5896
5897
5898         /* Master Lock INIT for info structure */
5899         SCTP_INP_INFO_LOCK_INIT();
5900         SCTP_STATLOG_INIT_LOCK();
5901
5902         SCTP_IPI_COUNT_INIT();
5903         SCTP_IPI_ADDR_INIT();
5904 #ifdef SCTP_PACKET_LOGGING
5905         SCTP_IP_PKTLOG_INIT();
5906 #endif
5907         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5908
5909         SCTP_WQ_ADDR_INIT();
5910         /* not sure if we need all the counts */
5911         SCTP_BASE_INFO(ipi_count_ep) = 0;
5912         /* assoc/tcb zone info */
5913         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5914         /* local addrlist zone info */
5915         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5916         /* remote addrlist zone info */
5917         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5918         /* chunk info */
5919         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5920
5921         /* socket queue zone info */
5922         SCTP_BASE_INFO(ipi_count_readq) = 0;
5923
5924         /* stream out queue cont */
5925         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5926
5927         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5928         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5929
5930         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5931
5932         /* Init the TIMEWAIT list */
5933         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5934                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5935         }
5936
5937         sctp_startup_iterator();
5938
5939 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5940         sctp_startup_mcore_threads();
5941 #endif
5942
5943         /*
5944          * INIT the default VRF which for BSD is the only one, other O/S's
5945          * may have more. But initially they must start with one and then
5946          * add the VRF's as addresses are added.
5947          */
5948         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5949 }
5950
5951 /*
5952  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5953  */
5954 void
5955 sctp_pcb_finish(void)
5956 {
5957         struct sctp_vrflist *vrf_bucket;
5958         struct sctp_vrf *vrf, *nvrf;
5959         struct sctp_ifn *ifn, *nifn;
5960         struct sctp_ifa *ifa, *nifa;
5961         struct sctpvtaghead *chain;
5962         struct sctp_tagblock *twait_block, *prev_twait_block;
5963         struct sctp_laddr *wi, *nwi;
5964         int i;
5965
5966         /*
5967          * Free BSD the it thread never exits but we do clean up. The only
5968          * way freebsd reaches here if we have VRF's but we still add the
5969          * ifdef to make it compile on old versions.
5970          */
5971         {
5972                 struct sctp_iterator *it, *nit;
5973
5974                 SCTP_IPI_ITERATOR_WQ_LOCK();
5975                 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5976                         if (it->vn != curvnet) {
5977                                 continue;
5978                         }
5979                         TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5980                         if (it->function_atend != NULL) {
5981                                 (*it->function_atend) (it->pointer, it->val);
5982                         }
5983                         SCTP_FREE(it, SCTP_M_ITER);
5984                 }
5985                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5986                 SCTP_ITERATOR_LOCK();
5987                 if ((sctp_it_ctl.cur_it) &&
5988                     (sctp_it_ctl.cur_it->vn == curvnet)) {
5989                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5990                 }
5991                 SCTP_ITERATOR_UNLOCK();
5992         }
5993
5994         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5995         SCTP_WQ_ADDR_LOCK();
5996         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5997                 LIST_REMOVE(wi, sctp_nxt_addr);
5998                 SCTP_DECR_LADDR_COUNT();
5999                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
6000         }
6001         SCTP_WQ_ADDR_UNLOCK();
6002
6003         /*
6004          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
6005          * destroyed first).
6006          */
6007         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
6008         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
6009                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
6010                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
6011                                 /* free the ifa */
6012                                 LIST_REMOVE(ifa, next_bucket);
6013                                 LIST_REMOVE(ifa, next_ifa);
6014                                 SCTP_FREE(ifa, SCTP_M_IFA);
6015                         }
6016                         /* free the ifn */
6017                         LIST_REMOVE(ifn, next_bucket);
6018                         LIST_REMOVE(ifn, next_ifn);
6019                         SCTP_FREE(ifn, SCTP_M_IFN);
6020                 }
6021                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
6022                 /* free the vrf */
6023                 LIST_REMOVE(vrf, next_vrf);
6024                 SCTP_FREE(vrf, SCTP_M_VRF);
6025         }
6026         /* free the vrf hashes */
6027         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
6028         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
6029
6030         /*
6031          * free the TIMEWAIT list elements malloc'd in the function
6032          * sctp_add_vtag_to_timewait()...
6033          */
6034         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6035                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
6036                 if (!LIST_EMPTY(chain)) {
6037                         prev_twait_block = NULL;
6038                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6039                                 if (prev_twait_block) {
6040                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6041                                 }
6042                                 prev_twait_block = twait_block;
6043                         }
6044                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6045                 }
6046         }
6047
6048         /* free the locks and mutexes */
6049 #ifdef SCTP_PACKET_LOGGING
6050         SCTP_IP_PKTLOG_DESTROY();
6051 #endif
6052         SCTP_IPI_ADDR_DESTROY();
6053         SCTP_STATLOG_DESTROY();
6054         SCTP_INP_INFO_LOCK_DESTROY();
6055
6056         SCTP_WQ_ADDR_DESTROY();
6057
6058         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6059         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6060         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6061         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6062         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6063         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6064         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6065         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6066         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6067         /* Get rid of other stuff to */
6068         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6069                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6070         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6071                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6072         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6073                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6074 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6075         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6076 #endif
6077 }
6078
6079
6080 int
6081 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6082     int offset, int limit, struct sctphdr *sh,
6083     struct sockaddr *altsa)
6084 {
6085         /*
6086          * grub through the INIT pulling addresses and loading them to the
6087          * nets structure in the asoc. The from address in the mbuf should
6088          * also be loaded (if it is not already). This routine can be called
6089          * with either INIT or INIT-ACK's as long as the m points to the IP
6090          * packet and the offset points to the beginning of the parameters.
6091          */
6092         struct sctp_inpcb *inp;
6093         struct sctp_nets *net, *nnet, *net_tmp;
6094         struct ip *iph;
6095         struct sctp_paramhdr *phdr, parm_buf;
6096         struct sctp_tcb *stcb_tmp;
6097         uint16_t ptype, plen;
6098         struct sockaddr *sa;
6099         struct sockaddr_storage dest_store;
6100         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
6101         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6102         struct sctp_auth_random *p_random = NULL;
6103         uint16_t random_len = 0;
6104         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6105         struct sctp_auth_hmac_algo *hmacs = NULL;
6106         uint16_t hmacs_len = 0;
6107         uint8_t saw_asconf = 0;
6108         uint8_t saw_asconf_ack = 0;
6109         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6110         struct sctp_auth_chunk_list *chunks = NULL;
6111         uint16_t num_chunks = 0;
6112         sctp_key_t *new_key;
6113         uint32_t keylen;
6114         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6115         uint8_t ecn_allowed;
6116
6117 #ifdef INET
6118         struct sockaddr_in sin;
6119
6120 #endif
6121 #ifdef INET6
6122         struct sockaddr_in6 sin6;
6123
6124 #endif
6125
6126         /* First get the destination address setup too. */
6127 #ifdef INET
6128         memset(&sin, 0, sizeof(sin));
6129         sin.sin_family = AF_INET;
6130         sin.sin_len = sizeof(sin);
6131         sin.sin_port = stcb->rport;
6132 #endif
6133 #ifdef INET6
6134         memset(&sin6, 0, sizeof(sin6));
6135         sin6.sin6_family = AF_INET6;
6136         sin6.sin6_len = sizeof(struct sockaddr_in6);
6137         sin6.sin6_port = stcb->rport;
6138 #endif
6139         iph = mtod(m, struct ip *);
6140         switch (iph->ip_v) {
6141 #ifdef INET
6142         case IPVERSION:
6143                 {
6144                         /* its IPv4 */
6145                         struct sockaddr_in *sin_2;
6146
6147                         sin_2 = (struct sockaddr_in *)(local_sa);
6148                         memset(sin_2, 0, sizeof(sin));
6149                         sin_2->sin_family = AF_INET;
6150                         sin_2->sin_len = sizeof(sin);
6151                         sin_2->sin_port = sh->dest_port;
6152                         sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
6153                         if (altsa) {
6154                                 /*
6155                                  * For cookies we use the src address NOT
6156                                  * from the packet but from the original
6157                                  * INIT.
6158                                  */
6159                                 sa = altsa;
6160                         } else {
6161                                 sin.sin_addr = iph->ip_src;
6162                                 sa = (struct sockaddr *)&sin;
6163                         }
6164                         break;
6165                 }
6166 #endif
6167 #ifdef INET6
6168         case IPV6_VERSION >> 4:
6169                 {
6170                         /* its IPv6 */
6171                         struct ip6_hdr *ip6;
6172                         struct sockaddr_in6 *sin6_2;
6173
6174                         ip6 = mtod(m, struct ip6_hdr *);
6175                         sin6_2 = (struct sockaddr_in6 *)(local_sa);
6176                         memset(sin6_2, 0, sizeof(sin6));
6177                         sin6_2->sin6_family = AF_INET6;
6178                         sin6_2->sin6_len = sizeof(struct sockaddr_in6);
6179                         sin6_2->sin6_port = sh->dest_port;
6180                         sin6_2->sin6_addr = ip6->ip6_dst;
6181                         if (altsa) {
6182                                 /*
6183                                  * For cookies we use the src address NOT
6184                                  * from the packet but from the original
6185                                  * INIT.
6186                                  */
6187                                 sa = altsa;
6188                         } else {
6189                                 sin6.sin6_addr = ip6->ip6_src;
6190                                 sa = (struct sockaddr *)&sin6;
6191                         }
6192                         break;
6193                 }
6194 #endif
6195         default:
6196                 return (-1);
6197                 break;
6198         }
6199         /* Turn off ECN until we get through all params */
6200         ecn_allowed = 0;
6201         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6202                 /* mark all addresses that we have currently on the list */
6203                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6204         }
6205         /* does the source address already exist? if so skip it */
6206         inp = stcb->sctp_ep;
6207         atomic_add_int(&stcb->asoc.refcnt, 1);
6208         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
6209         atomic_add_int(&stcb->asoc.refcnt, -1);
6210
6211         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6212                 /* we must add the source address */
6213                 /* no scope set here since we have a tcb already. */
6214                 switch (sa->sa_family) {
6215 #ifdef INET
6216                 case AF_INET:
6217                         if (stcb->asoc.ipv4_addr_legal) {
6218                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6219                                         return (-1);
6220                                 }
6221                         }
6222                         break;
6223 #endif
6224 #ifdef INET6
6225                 case AF_INET6:
6226                         if (stcb->asoc.ipv6_addr_legal) {
6227                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6228                                         return (-2);
6229                                 }
6230                         }
6231                         break;
6232 #endif
6233                 default:
6234                         break;
6235                 }
6236         } else {
6237                 if (net_tmp != NULL && stcb_tmp == stcb) {
6238                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6239                 } else if (stcb_tmp != stcb) {
6240                         /* It belongs to another association? */
6241                         if (stcb_tmp)
6242                                 SCTP_TCB_UNLOCK(stcb_tmp);
6243                         return (-3);
6244                 }
6245         }
6246         if (stcb->asoc.state == 0) {
6247                 /* the assoc was freed? */
6248                 return (-4);
6249         }
6250         /*
6251          * peer must explicitly turn this on. This may have been initialized
6252          * to be "on" in order to allow local addr changes while INIT's are
6253          * in flight.
6254          */
6255         stcb->asoc.peer_supports_asconf = 0;
6256         /* now we must go through each of the params. */
6257         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6258         while (phdr) {
6259                 ptype = ntohs(phdr->param_type);
6260                 plen = ntohs(phdr->param_length);
6261                 /*
6262                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6263                  * (uint32_t)ptype, (int)plen);
6264                  */
6265                 if (offset + plen > limit) {
6266                         break;
6267                 }
6268                 if (plen == 0) {
6269                         break;
6270                 }
6271 #ifdef INET
6272                 if (ptype == SCTP_IPV4_ADDRESS) {
6273                         if (stcb->asoc.ipv4_addr_legal) {
6274                                 struct sctp_ipv4addr_param *p4, p4_buf;
6275
6276                                 /* ok get the v4 address and check/add */
6277                                 phdr = sctp_get_next_param(m, offset,
6278                                     (struct sctp_paramhdr *)&p4_buf,
6279                                     sizeof(p4_buf));
6280                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6281                                     phdr == NULL) {
6282                                         return (-5);
6283                                 }
6284                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6285                                 sin.sin_addr.s_addr = p4->addr;
6286                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6287                                         /* Skip multi-cast addresses */
6288                                         goto next_param;
6289                                 }
6290                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6291                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6292                                         goto next_param;
6293                                 }
6294                                 sa = (struct sockaddr *)&sin;
6295                                 inp = stcb->sctp_ep;
6296                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6297                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6298                                     local_sa, stcb);
6299                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6300
6301                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6302                                     inp == NULL) {
6303                                         /* we must add the source address */
6304                                         /*
6305                                          * no scope set since we have a tcb
6306                                          * already
6307                                          */
6308
6309                                         /*
6310                                          * we must validate the state again
6311                                          * here
6312                                          */
6313                         add_it_now:
6314                                         if (stcb->asoc.state == 0) {
6315                                                 /* the assoc was freed? */
6316                                                 return (-7);
6317                                         }
6318                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6319                                                 return (-8);
6320                                         }
6321                                 } else if (stcb_tmp == stcb) {
6322                                         if (stcb->asoc.state == 0) {
6323                                                 /* the assoc was freed? */
6324                                                 return (-10);
6325                                         }
6326                                         if (net != NULL) {
6327                                                 /* clear flag */
6328                                                 net->dest_state &=
6329                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6330                                         }
6331                                 } else {
6332                                         /*
6333                                          * strange, address is in another
6334                                          * assoc? straighten out locks.
6335                                          */
6336                                         if (stcb_tmp) {
6337                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6338                                                         /*
6339                                                          * in setup state we
6340                                                          * abort this guy
6341                                                          */
6342                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6343                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6344                                                         goto add_it_now;
6345                                                 }
6346                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6347                                         }
6348                                         if (stcb->asoc.state == 0) {
6349                                                 /* the assoc was freed? */
6350                                                 return (-12);
6351                                         }
6352                                         return (-13);
6353                                 }
6354                         }
6355                 } else
6356 #endif
6357 #ifdef INET6
6358                 if (ptype == SCTP_IPV6_ADDRESS) {
6359                         if (stcb->asoc.ipv6_addr_legal) {
6360                                 /* ok get the v6 address and check/add */
6361                                 struct sctp_ipv6addr_param *p6, p6_buf;
6362
6363                                 phdr = sctp_get_next_param(m, offset,
6364                                     (struct sctp_paramhdr *)&p6_buf,
6365                                     sizeof(p6_buf));
6366                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6367                                     phdr == NULL) {
6368                                         return (-14);
6369                                 }
6370                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6371                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6372                                     sizeof(p6->addr));
6373                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6374                                         /* Skip multi-cast addresses */
6375                                         goto next_param;
6376                                 }
6377                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6378                                         /*
6379                                          * Link local make no sense without
6380                                          * scope
6381                                          */
6382                                         goto next_param;
6383                                 }
6384                                 sa = (struct sockaddr *)&sin6;
6385                                 inp = stcb->sctp_ep;
6386                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6387                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6388                                     local_sa, stcb);
6389                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6390                                 if (stcb_tmp == NULL &&
6391                                     (inp == stcb->sctp_ep || inp == NULL)) {
6392                                         /*
6393                                          * we must validate the state again
6394                                          * here
6395                                          */
6396                         add_it_now6:
6397                                         if (stcb->asoc.state == 0) {
6398                                                 /* the assoc was freed? */
6399                                                 return (-16);
6400                                         }
6401                                         /*
6402                                          * we must add the address, no scope
6403                                          * set
6404                                          */
6405                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6406                                                 return (-17);
6407                                         }
6408                                 } else if (stcb_tmp == stcb) {
6409                                         /*
6410                                          * we must validate the state again
6411                                          * here
6412                                          */
6413                                         if (stcb->asoc.state == 0) {
6414                                                 /* the assoc was freed? */
6415                                                 return (-19);
6416                                         }
6417                                         if (net != NULL) {
6418                                                 /* clear flag */
6419                                                 net->dest_state &=
6420                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6421                                         }
6422                                 } else {
6423                                         /*
6424                                          * strange, address is in another
6425                                          * assoc? straighten out locks.
6426                                          */
6427                                         if (stcb_tmp)
6428                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6429                                                         /*
6430                                                          * in setup state we
6431                                                          * abort this guy
6432                                                          */
6433                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6434                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6435                                                         goto add_it_now6;
6436                                                 }
6437                                         SCTP_TCB_UNLOCK(stcb_tmp);
6438
6439                                         if (stcb->asoc.state == 0) {
6440                                                 /* the assoc was freed? */
6441                                                 return (-21);
6442                                         }
6443                                         return (-22);
6444                                 }
6445                         }
6446                 } else
6447 #endif
6448                 if (ptype == SCTP_ECN_CAPABLE) {
6449                         ecn_allowed = 1;
6450                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6451                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6452                                 struct sctp_adaptation_layer_indication ai,
6453                                                                 *aip;
6454
6455                                 phdr = sctp_get_next_param(m, offset,
6456                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6457                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6458                                 if (aip) {
6459                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6460                                         stcb->asoc.adaptation_needed = 1;
6461                                 }
6462                         }
6463                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6464                         struct sctp_asconf_addr_param lstore, *fee;
6465                         int lptype;
6466                         struct sockaddr *lsa = NULL;
6467
6468 #ifdef INET
6469                         struct sctp_asconf_addrv4_param *fii;
6470
6471 #endif
6472
6473                         stcb->asoc.peer_supports_asconf = 1;
6474                         if (plen > sizeof(lstore)) {
6475                                 return (-23);
6476                         }
6477                         phdr = sctp_get_next_param(m, offset,
6478                             (struct sctp_paramhdr *)&lstore,
6479                             min(plen, sizeof(lstore)));
6480                         if (phdr == NULL) {
6481                                 return (-24);
6482                         }
6483                         fee = (struct sctp_asconf_addr_param *)phdr;
6484                         lptype = ntohs(fee->addrp.ph.param_type);
6485                         switch (lptype) {
6486 #ifdef INET
6487                         case SCTP_IPV4_ADDRESS:
6488                                 if (plen !=
6489                                     sizeof(struct sctp_asconf_addrv4_param)) {
6490                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6491                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6492                                             plen);
6493                                 } else {
6494                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6495                                         sin.sin_addr.s_addr = fii->addrp.addr;
6496                                         lsa = (struct sockaddr *)&sin;
6497                                 }
6498                                 break;
6499 #endif
6500 #ifdef INET6
6501                         case SCTP_IPV6_ADDRESS:
6502                                 if (plen !=
6503                                     sizeof(struct sctp_asconf_addr_param)) {
6504                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6505                                             (int)sizeof(struct sctp_asconf_addr_param),
6506                                             plen);
6507                                 } else {
6508                                         memcpy(sin6.sin6_addr.s6_addr,
6509                                             fee->addrp.addr,
6510                                             sizeof(fee->addrp.addr));
6511                                         lsa = (struct sockaddr *)&sin6;
6512                                 }
6513                                 break;
6514 #endif
6515                         default:
6516                                 break;
6517                         }
6518                         if (lsa) {
6519                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6520                         }
6521                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6522                         stcb->asoc.peer_supports_nat = 1;
6523                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6524                         /* Peer supports pr-sctp */
6525                         stcb->asoc.peer_supports_prsctp = 1;
6526                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6527                         /* A supported extension chunk */
6528                         struct sctp_supported_chunk_types_param *pr_supported;
6529                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6530                         int num_ent, i;
6531
6532                         phdr = sctp_get_next_param(m, offset,
6533                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6534                         if (phdr == NULL) {
6535                                 return (-25);
6536                         }
6537                         stcb->asoc.peer_supports_asconf = 0;
6538                         stcb->asoc.peer_supports_prsctp = 0;
6539                         stcb->asoc.peer_supports_pktdrop = 0;
6540                         stcb->asoc.peer_supports_strreset = 0;
6541                         stcb->asoc.peer_supports_nr_sack = 0;
6542                         stcb->asoc.peer_supports_auth = 0;
6543                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6544                         num_ent = plen - sizeof(struct sctp_paramhdr);
6545                         for (i = 0; i < num_ent; i++) {
6546                                 switch (pr_supported->chunk_types[i]) {
6547                                 case SCTP_ASCONF:
6548                                 case SCTP_ASCONF_ACK:
6549                                         stcb->asoc.peer_supports_asconf = 1;
6550                                         break;
6551                                 case SCTP_FORWARD_CUM_TSN:
6552                                         stcb->asoc.peer_supports_prsctp = 1;
6553                                         break;
6554                                 case SCTP_PACKET_DROPPED:
6555                                         stcb->asoc.peer_supports_pktdrop = 1;
6556                                         break;
6557                                 case SCTP_NR_SELECTIVE_ACK:
6558                                         stcb->asoc.peer_supports_nr_sack = 1;
6559                                         break;
6560                                 case SCTP_STREAM_RESET:
6561                                         stcb->asoc.peer_supports_strreset = 1;
6562                                         break;
6563                                 case SCTP_AUTHENTICATION:
6564                                         stcb->asoc.peer_supports_auth = 1;
6565                                         break;
6566                                 default:
6567                                         /* one I have not learned yet */
6568                                         break;
6569
6570                                 }
6571                         }
6572                 } else if (ptype == SCTP_RANDOM) {
6573                         if (plen > sizeof(random_store))
6574                                 break;
6575                         if (got_random) {
6576                                 /* already processed a RANDOM */
6577                                 goto next_param;
6578                         }
6579                         phdr = sctp_get_next_param(m, offset,
6580                             (struct sctp_paramhdr *)random_store,
6581                             min(sizeof(random_store), plen));
6582                         if (phdr == NULL)
6583                                 return (-26);
6584                         p_random = (struct sctp_auth_random *)phdr;
6585                         random_len = plen - sizeof(*p_random);
6586                         /* enforce the random length */
6587                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6588                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6589                                 return (-27);
6590                         }
6591                         got_random = 1;
6592                 } else if (ptype == SCTP_HMAC_LIST) {
6593                         int num_hmacs;
6594                         int i;
6595
6596                         if (plen > sizeof(hmacs_store))
6597                                 break;
6598                         if (got_hmacs) {
6599                                 /* already processed a HMAC list */
6600                                 goto next_param;
6601                         }
6602                         phdr = sctp_get_next_param(m, offset,
6603                             (struct sctp_paramhdr *)hmacs_store,
6604                             min(plen, sizeof(hmacs_store)));
6605                         if (phdr == NULL)
6606                                 return (-28);
6607                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6608                         hmacs_len = plen - sizeof(*hmacs);
6609                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6610                         /* validate the hmac list */
6611                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6612                                 return (-29);
6613                         }
6614                         if (stcb->asoc.peer_hmacs != NULL)
6615                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6616                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6617                         if (stcb->asoc.peer_hmacs != NULL) {
6618                                 for (i = 0; i < num_hmacs; i++) {
6619                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6620                                             ntohs(hmacs->hmac_ids[i]));
6621                                 }
6622                         }
6623                         got_hmacs = 1;
6624                 } else if (ptype == SCTP_CHUNK_LIST) {
6625                         int i;
6626
6627                         if (plen > sizeof(chunks_store))
6628                                 break;
6629                         if (got_chklist) {
6630                                 /* already processed a Chunks list */
6631                                 goto next_param;
6632                         }
6633                         phdr = sctp_get_next_param(m, offset,
6634                             (struct sctp_paramhdr *)chunks_store,
6635                             min(plen, sizeof(chunks_store)));
6636                         if (phdr == NULL)
6637                                 return (-30);
6638                         chunks = (struct sctp_auth_chunk_list *)phdr;
6639                         num_chunks = plen - sizeof(*chunks);
6640                         if (stcb->asoc.peer_auth_chunks != NULL)
6641                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6642                         else
6643                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6644                         for (i = 0; i < num_chunks; i++) {
6645                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6646                                     stcb->asoc.peer_auth_chunks);
6647                                 /* record asconf/asconf-ack if listed */
6648                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6649                                         saw_asconf = 1;
6650                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6651                                         saw_asconf_ack = 1;
6652
6653                         }
6654                         got_chklist = 1;
6655                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6656                             (ptype == SCTP_STATE_COOKIE) ||
6657                             (ptype == SCTP_UNRECOG_PARAM) ||
6658                             (ptype == SCTP_COOKIE_PRESERVE) ||
6659                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6660                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6661                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6662                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6663                     (ptype == SCTP_SUCCESS_REPORT)) {
6664                          /* don't care */ ;
6665                 } else {
6666                         if ((ptype & 0x8000) == 0x0000) {
6667                                 /*
6668                                  * must stop processing the rest of the
6669                                  * param's. Any report bits were handled
6670                                  * with the call to
6671                                  * sctp_arethere_unrecognized_parameters()
6672                                  * when the INIT or INIT-ACK was first seen.
6673                                  */
6674                                 break;
6675                         }
6676                 }
6677
6678 next_param:
6679                 offset += SCTP_SIZE32(plen);
6680                 if (offset >= limit) {
6681                         break;
6682                 }
6683                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6684                     sizeof(parm_buf));
6685         }
6686         /* Now check to see if we need to purge any addresses */
6687         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6688                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6689                     SCTP_ADDR_NOT_IN_ASSOC) {
6690                         /* This address has been removed from the asoc */
6691                         /* remove and free it */
6692                         stcb->asoc.numnets--;
6693                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6694                         sctp_free_remote_addr(net);
6695                         if (net == stcb->asoc.primary_destination) {
6696                                 stcb->asoc.primary_destination = NULL;
6697                                 sctp_select_primary_destination(stcb);
6698                         }
6699                 }
6700         }
6701         if (ecn_allowed == 0) {
6702                 stcb->asoc.ecn_allowed = 0;
6703         }
6704         /* validate authentication required parameters */
6705         if (got_random && got_hmacs) {
6706                 stcb->asoc.peer_supports_auth = 1;
6707         } else {
6708                 stcb->asoc.peer_supports_auth = 0;
6709         }
6710         if (!stcb->asoc.peer_supports_auth && got_chklist) {
6711                 /* peer does not support auth but sent a chunks list? */
6712                 return (-31);
6713         }
6714         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6715             !stcb->asoc.peer_supports_auth) {
6716                 /* peer supports asconf but not auth? */
6717                 return (-32);
6718         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6719             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6720                 return (-33);
6721         }
6722         /* concatenate the full random key */
6723         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6724         if (chunks != NULL) {
6725                 keylen += sizeof(*chunks) + num_chunks;
6726         }
6727         new_key = sctp_alloc_key(keylen);
6728         if (new_key != NULL) {
6729                 /* copy in the RANDOM */
6730                 if (p_random != NULL) {
6731                         keylen = sizeof(*p_random) + random_len;
6732                         bcopy(p_random, new_key->key, keylen);
6733                 }
6734                 /* append in the AUTH chunks */
6735                 if (chunks != NULL) {
6736                         bcopy(chunks, new_key->key + keylen,
6737                             sizeof(*chunks) + num_chunks);
6738                         keylen += sizeof(*chunks) + num_chunks;
6739                 }
6740                 /* append in the HMACs */
6741                 if (hmacs != NULL) {
6742                         bcopy(hmacs, new_key->key + keylen,
6743                             sizeof(*hmacs) + hmacs_len);
6744                 }
6745         } else {
6746                 /* failed to get memory for the key */
6747                 return (-34);
6748         }
6749         if (stcb->asoc.authinfo.peer_random != NULL)
6750                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6751         stcb->asoc.authinfo.peer_random = new_key;
6752         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6753         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6754
6755         return (0);
6756 }
6757
6758 int
6759 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6760     struct sctp_nets *net)
6761 {
6762         /* make sure the requested primary address exists in the assoc */
6763         if (net == NULL && sa)
6764                 net = sctp_findnet(stcb, sa);
6765
6766         if (net == NULL) {
6767                 /* didn't find the requested primary address! */
6768                 return (-1);
6769         } else {
6770                 /* set the primary address */
6771                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6772                         /* Must be confirmed, so queue to set */
6773                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6774                         return (0);
6775                 }
6776                 stcb->asoc.primary_destination = net;
6777                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6778                         sctp_free_remote_addr(stcb->asoc.alternate);
6779                         stcb->asoc.alternate = NULL;
6780                 }
6781                 net = TAILQ_FIRST(&stcb->asoc.nets);
6782                 if (net != stcb->asoc.primary_destination) {
6783                         /*
6784                          * first one on the list is NOT the primary
6785                          * sctp_cmpaddr() is much more efficient if the
6786                          * primary is the first on the list, make it so.
6787                          */
6788                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6789                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6790                 }
6791                 return (0);
6792         }
6793 }
6794
6795 int
6796 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6797 {
6798         /*
6799          * This function serves two purposes. It will see if a TAG can be
6800          * re-used and return 1 for yes it is ok and 0 for don't use that
6801          * tag. A secondary function it will do is purge out old tags that
6802          * can be removed.
6803          */
6804         struct sctpvtaghead *chain;
6805         struct sctp_tagblock *twait_block;
6806         struct sctpasochead *head;
6807         struct sctp_tcb *stcb;
6808         int i;
6809
6810         SCTP_INP_INFO_RLOCK();
6811         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6812             SCTP_BASE_INFO(hashasocmark))];
6813         if (head == NULL) {
6814                 /* invalid vtag */
6815                 goto skip_vtag_check;
6816         }
6817         LIST_FOREACH(stcb, head, sctp_asocs) {
6818                 /*
6819                  * We choose not to lock anything here. TCB's can't be
6820                  * removed since we have the read lock, so they can't be
6821                  * freed on us, same thing for the INP. I may be wrong with
6822                  * this assumption, but we will go with it for now :-)
6823                  */
6824                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6825                         continue;
6826                 }
6827                 if (stcb->asoc.my_vtag == tag) {
6828                         /* candidate */
6829                         if (stcb->rport != rport) {
6830                                 continue;
6831                         }
6832                         if (stcb->sctp_ep->sctp_lport != lport) {
6833                                 continue;
6834                         }
6835                         /* Its a used tag set */
6836                         SCTP_INP_INFO_RUNLOCK();
6837                         return (0);
6838                 }
6839         }
6840 skip_vtag_check:
6841
6842         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6843         /* Now what about timed wait ? */
6844         if (!LIST_EMPTY(chain)) {
6845                 /*
6846                  * Block(s) are present, lets see if we have this tag in the
6847                  * list
6848                  */
6849                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6850                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6851                                 if (twait_block->vtag_block[i].v_tag == 0) {
6852                                         /* not used */
6853                                         continue;
6854                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6855                                     now->tv_sec) {
6856                                         /* Audit expires this guy */
6857                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
6858                                         twait_block->vtag_block[i].v_tag = 0;
6859                                         twait_block->vtag_block[i].lport = 0;
6860                                         twait_block->vtag_block[i].rport = 0;
6861                                 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6862                                             (twait_block->vtag_block[i].lport == lport) &&
6863                                     (twait_block->vtag_block[i].rport == rport)) {
6864                                         /* Bad tag, sorry :< */
6865                                         SCTP_INP_INFO_RUNLOCK();
6866                                         return (0);
6867                                 }
6868                         }
6869                 }
6870         }
6871         SCTP_INP_INFO_RUNLOCK();
6872         return (1);
6873 }
6874
6875 static void
6876 sctp_drain_mbufs(struct sctp_tcb *stcb)
6877 {
6878         /*
6879          * We must hunt this association for MBUF's past the cumack (i.e.
6880          * out of order data that we can renege on).
6881          */
6882         struct sctp_association *asoc;
6883         struct sctp_tmit_chunk *chk, *nchk;
6884         uint32_t cumulative_tsn_p1;
6885         struct sctp_queued_to_read *ctl, *nctl;
6886         int cnt, strmat;
6887         uint32_t gap, i;
6888         int fnd = 0;
6889
6890         /* We look for anything larger than the cum-ack + 1 */
6891
6892         asoc = &stcb->asoc;
6893         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6894                 /* none we can reneg on. */
6895                 return;
6896         }
6897         SCTP_STAT_INCR(sctps_protocol_drains_done);
6898         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6899         cnt = 0;
6900         /* First look in the re-assembly queue */
6901         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6902                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6903                         /* Yep it is above cum-ack */
6904                         cnt++;
6905                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6906                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6907                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6908                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6909                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6910                         if (chk->data) {
6911                                 sctp_m_freem(chk->data);
6912                                 chk->data = NULL;
6913                         }
6914                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6915                 }
6916         }
6917         /* Ok that was fun, now we will drain all the inbound streams? */
6918         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6919                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6920                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6921                                 /* Yep it is above cum-ack */
6922                                 cnt++;
6923                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6924                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6925                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6926                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6927                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6928                                 if (ctl->data) {
6929                                         sctp_m_freem(ctl->data);
6930                                         ctl->data = NULL;
6931                                 }
6932                                 sctp_free_remote_addr(ctl->whoFrom);
6933                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6934                                 SCTP_DECR_READQ_COUNT();
6935                         }
6936                 }
6937         }
6938         if (cnt) {
6939                 /* We must back down to see what the new highest is */
6940                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6941                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6942                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6943                                 asoc->highest_tsn_inside_map = i;
6944                                 fnd = 1;
6945                                 break;
6946                         }
6947                 }
6948                 if (!fnd) {
6949                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6950                 }
6951                 /*
6952                  * Question, should we go through the delivery queue? The
6953                  * only reason things are on here is the app not reading OR
6954                  * a p-d-api up. An attacker COULD send enough in to
6955                  * initiate the PD-API and then send a bunch of stuff to
6956                  * other streams... these would wind up on the delivery
6957                  * queue.. and then we would not get to them. But in order
6958                  * to do this I then have to back-track and un-deliver
6959                  * sequence numbers in streams.. el-yucko. I think for now
6960                  * we will NOT look at the delivery queue and leave it to be
6961                  * something to consider later. An alternative would be to
6962                  * abort the P-D-API with a notification and then deliver
6963                  * the data.... Or another method might be to keep track of
6964                  * how many times the situation occurs and if we see a
6965                  * possible attack underway just abort the association.
6966                  */
6967 #ifdef SCTP_DEBUG
6968                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6969 #endif
6970                 /*
6971                  * Now do we need to find a new
6972                  * asoc->highest_tsn_inside_map?
6973                  */
6974                 asoc->last_revoke_count = cnt;
6975                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6976                 /* sa_ignore NO_NULL_CHK */
6977                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6978                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6979         }
6980         /*
6981          * Another issue, in un-setting the TSN's in the mapping array we
6982          * DID NOT adjust the highest_tsn marker.  This will cause one of
6983          * two things to occur. It may cause us to do extra work in checking
6984          * for our mapping array movement. More importantly it may cause us
6985          * to SACK every datagram. This may not be a bad thing though since
6986          * we will recover once we get our cum-ack above and all this stuff
6987          * we dumped recovered.
6988          */
6989 }
6990
6991 void
6992 sctp_drain()
6993 {
6994         /*
6995          * We must walk the PCB lists for ALL associations here. The system
6996          * is LOW on MBUF's and needs help. This is where reneging will
6997          * occur. We really hope this does NOT happen!
6998          */
6999         VNET_ITERATOR_DECL(vnet_iter);
7000         VNET_LIST_RLOCK_NOSLEEP();
7001         VNET_FOREACH(vnet_iter) {
7002                 CURVNET_SET(vnet_iter);
7003                 struct sctp_inpcb *inp;
7004                 struct sctp_tcb *stcb;
7005
7006                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
7007                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7008 #ifdef VIMAGE
7009                         continue;
7010 #else
7011                         return;
7012 #endif
7013                 }
7014                 SCTP_INP_INFO_RLOCK();
7015                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7016                         /* For each endpoint */
7017                         SCTP_INP_RLOCK(inp);
7018                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7019                                 /* For each association */
7020                                 SCTP_TCB_LOCK(stcb);
7021                                 sctp_drain_mbufs(stcb);
7022                                 SCTP_TCB_UNLOCK(stcb);
7023                         }
7024                         SCTP_INP_RUNLOCK(inp);
7025                 }
7026                 SCTP_INP_INFO_RUNLOCK();
7027                 CURVNET_RESTORE();
7028         }
7029         VNET_LIST_RUNLOCK_NOSLEEP();
7030 }
7031
7032 /*
7033  * start a new iterator
7034  * iterates through all endpoints and associations based on the pcb_state
7035  * flags and asoc_state.  "af" (mandatory) is executed for all matching
7036  * assocs and "ef" (optional) is executed when the iterator completes.
7037  * "inpf" (optional) is executed for each new endpoint as it is being
7038  * iterated through. inpe (optional) is called when the inp completes
7039  * its way through all the stcbs.
7040  */
7041 int
7042 sctp_initiate_iterator(inp_func inpf,
7043     asoc_func af,
7044     inp_func inpe,
7045     uint32_t pcb_state,
7046     uint32_t pcb_features,
7047     uint32_t asoc_state,
7048     void *argp,
7049     uint32_t argi,
7050     end_func ef,
7051     struct sctp_inpcb *s_inp,
7052     uint8_t chunk_output_off)
7053 {
7054         struct sctp_iterator *it = NULL;
7055
7056         if (af == NULL) {
7057                 return (-1);
7058         }
7059         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7060             SCTP_M_ITER);
7061         if (it == NULL) {
7062                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7063                 return (ENOMEM);
7064         }
7065         memset(it, 0, sizeof(*it));
7066         it->function_assoc = af;
7067         it->function_inp = inpf;
7068         if (inpf)
7069                 it->done_current_ep = 0;
7070         else
7071                 it->done_current_ep = 1;
7072         it->function_atend = ef;
7073         it->pointer = argp;
7074         it->val = argi;
7075         it->pcb_flags = pcb_state;
7076         it->pcb_features = pcb_features;
7077         it->asoc_state = asoc_state;
7078         it->function_inp_end = inpe;
7079         it->no_chunk_output = chunk_output_off;
7080         it->vn = curvnet;
7081         if (s_inp) {
7082                 /* Assume lock is held here */
7083                 it->inp = s_inp;
7084                 SCTP_INP_INCR_REF(it->inp);
7085                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7086         } else {
7087                 SCTP_INP_INFO_RLOCK();
7088                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7089                 if (it->inp) {
7090                         SCTP_INP_INCR_REF(it->inp);
7091                 }
7092                 SCTP_INP_INFO_RUNLOCK();
7093                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7094
7095         }
7096         SCTP_IPI_ITERATOR_WQ_LOCK();
7097
7098         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7099         if (sctp_it_ctl.iterator_running == 0) {
7100                 sctp_wakeup_iterator();
7101         }
7102         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7103         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7104         return (0);
7105 }