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