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