sys/netinet/sctp_pcb.c

   1 /*-
   2  * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are met:
   6  *
   7  * a) Redistributions of source code must retain the above copyright notice,
   8  *   this list of conditions and the following disclaimer.
   9  *
  10  * b) Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in
  12  *   the documentation and/or other materials provided with the distribution.
  13  *
  14  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  15  *    contributors may be used to endorse or promote products derived
  16  *    from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  20  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  28  * THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 /* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $     */
  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
  49
  50 struct sctp_epinfo sctppcbinfo;
  51
  52 /* FIX: we don't handle multiple link local scopes */
  53 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  54 int
  55 SCTP6_ARE_ADDR_EQUAL(struct in6_addr *a, struct in6_addr *b)
  56 {
  57         struct in6_addr tmp_a, tmp_b;
  58
  59         /* use a copy of a and b */
  60         tmp_a = *a;
  61         tmp_b = *b;
  62         in6_clearscope(&tmp_a);
  63         in6_clearscope(&tmp_b);
  64         return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b));
  65 }
  66
  67 void
  68 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  69 {
  70         /*
  71          * We really don't need to lock this, but I will just because it
  72          * does not hurt.
  73          */
  74         SCTP_INP_INFO_RLOCK();
  75         spcb->ep_count = sctppcbinfo.ipi_count_ep;
  76         spcb->asoc_count = sctppcbinfo.ipi_count_asoc;
  77         spcb->laddr_count = sctppcbinfo.ipi_count_laddr;
  78         spcb->raddr_count = sctppcbinfo.ipi_count_raddr;
  79         spcb->chk_count = sctppcbinfo.ipi_count_chunk;
  80         spcb->readq_count = sctppcbinfo.ipi_count_readq;
  81         spcb->stream_oque = sctppcbinfo.ipi_count_strmoq;
  82         spcb->free_chunks = sctppcbinfo.ipi_free_chunks;
  83
  84         SCTP_INP_INFO_RUNLOCK();
  85 }
  86
  87 /*
  88  * Addresses are added to VRF's (Virtual Router's). For BSD we
  89  * have only the default VRF 0. We maintain a hash list of
  90  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
  91  * these has a list of addresses. When we add a new address
  92  * to a VRF we lookup the ifn/ifn_index, if the ifn does
  93  * not exist we create it and add it to the list of IFN's
  94  * within the VRF. Once we have the sctp_ifn, we add the
  95  * address to the list. So we look something like:
  96  *
  97  * hash-vrf-table
  98  *   vrf-> ifn-> ifn -> ifn
  99  *   vrf    |
 100  *    ...   +--ifa-> ifa -> ifa
 101  *   vrf
 102  *
 103  * We keep these seperate lists since the SCTP subsystem will
 104  * point to these from its source address selection nets structure.
 105  * When an address is deleted it does not happen right away on
 106  * the SCTP side, it gets scheduled. What we do when a
 107  * delete happens is immediately remove the address from
 108  * the master list and decrement the refcount. As our
 109  * addip iterator works through and frees the src address
 110  * selection pointing to the sctp_ifa, eventually the refcount
 111  * will reach 0 and we will delete it. Note that it is assumed
 112  * that any locking on system level ifn/ifa is done at the
 113  * caller of these functions and these routines will only
 114  * lock the SCTP structures as they add or delete things.
 115  *
 116  * Other notes on VRF concepts.
 117  *  - An endpoint can be in multiple VRF's
 118  *  - An association lives within a VRF and only one VRF.
 119  *  - Any incoming packet we can deduce the VRF for by
 120  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 121  *  - Any downward send call or connect call must supply the
 122  *    VRF via ancillary data or via some sort of set default
 123  *    VRF socket option call (again for BSD no brainer since
 124  *    the VRF is always 0).
 125  *  - An endpoint may add multiple VRF's to it.
 126  *  - Listening sockets can accept associations in any
 127  *    of the VRF's they are in but the assoc will end up
 128  *    in only one VRF (gotten from the packet or connect/send).
 129  *
 130  */
 131
 132 struct sctp_vrf *
 133 sctp_allocate_vrf(int vrf_id)
 134 {
 135         struct sctp_vrf *vrf = NULL;
 136         struct sctp_vrflist *bucket;
 137
 138         /* First allocate the VRF structure */
 139         vrf = sctp_find_vrf(vrf_id);
 140         if (vrf) {
 141                 /* Already allocated */
 142                 return (vrf);
 143         }
 144         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 145             SCTP_M_VRF);
 146         if (vrf == NULL) {
 147                 /* No memory */
 148 #ifdef INVARIANTS
 149                 panic("No memory for VRF:%d", vrf_id);
 150 #endif
 151                 return (NULL);
 152         }
 153         /* setup the VRF */
 154         memset(vrf, 0, sizeof(struct sctp_vrf));
 155         vrf->vrf_id = vrf_id;
 156         LIST_INIT(&vrf->ifnlist);
 157         vrf->total_ifa_count = 0;
 158         vrf->refcount = 0;
 159         /* now also setup table ids */
 160         SCTP_INIT_VRF_TABLEID(vrf);
 161         /* Init the HASH of addresses */
 162         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 163             &vrf->vrf_addr_hashmark);
 164         if (vrf->vrf_addr_hash == NULL) {
 165                 /* No memory */
 166 #ifdef INVARIANTS
 167                 panic("No memory for VRF:%d", vrf_id);
 168 #endif
 169                 SCTP_FREE(vrf, SCTP_M_VRF);
 170                 return (NULL);
 171         }
 172         /* Add it to the hash table */
 173         bucket = &sctppcbinfo.sctp_vrfhash[(vrf_id & sctppcbinfo.hashvrfmark)];
 174         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 175         atomic_add_int(&sctppcbinfo.ipi_count_vrfs, 1);
 176         return (vrf);
 177 }
 178
 179
 180 struct sctp_ifn *
 181 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 182 {
 183         struct sctp_ifn *sctp_ifnp;
 184         struct sctp_ifnlist *hash_ifn_head;
 185
 186         /*
 187          * We assume the lock is held for the addresses if thats wrong
 188          * problems could occur :-)
 189          */
 190         hash_ifn_head = &sctppcbinfo.vrf_ifn_hash[(ifn_index & sctppcbinfo.vrf_ifn_hashmark)];
 191         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 192                 if (sctp_ifnp->ifn_index == ifn_index) {
 193                         return (sctp_ifnp);
 194                 }
 195                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 196                         return (sctp_ifnp);
 197                 }
 198         }
 199         return (NULL);
 200 }
 201
 202
 203
 204 struct sctp_vrf *
 205 sctp_find_vrf(uint32_t vrf_id)
 206 {
 207         struct sctp_vrflist *bucket;
 208         struct sctp_vrf *liste;
 209
 210         bucket = &sctppcbinfo.sctp_vrfhash[(vrf_id & sctppcbinfo.hashvrfmark)];
 211         LIST_FOREACH(liste, bucket, next_vrf) {
 212                 if (vrf_id == liste->vrf_id) {
 213                         return (liste);
 214                 }
 215         }
 216         return (NULL);
 217 }
 218
 219 void
 220 sctp_free_vrf(struct sctp_vrf *vrf)
 221 {
 222         int ret;
 223
 224         ret = atomic_fetchadd_int(&vrf->refcount, -1);
 225         if (ret == 1) {
 226                 /* We zero'd the count */
 227                 LIST_REMOVE(vrf, next_vrf);
 228                 SCTP_FREE(vrf, SCTP_M_VRF);
 229                 atomic_subtract_int(&sctppcbinfo.ipi_count_vrfs, 1);
 230         }
 231 }
 232
 233 void
 234 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 235 {
 236         int ret;
 237
 238         ret = atomic_fetchadd_int(&sctp_ifnp->refcount, -1);
 239         if (ret == 1) {
 240                 /* We zero'd the count */
 241                 if (sctp_ifnp->vrf) {
 242                         sctp_free_vrf(sctp_ifnp->vrf);
 243                 }
 244                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 245                 atomic_subtract_int(&sctppcbinfo.ipi_count_ifns, 1);
 246         }
 247 }
 248
 249 void
 250 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 251 {
 252         struct sctp_ifn *sctp_ifnp;
 253
 254         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 255         if (sctp_ifnp != NULL) {
 256                 sctp_ifnp->ifn_mtu = mtu;
 257         }
 258 }
 259
 260
 261 void
 262 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 263 {
 264         int ret;
 265
 266         ret = atomic_fetchadd_int(&sctp_ifap->refcount, -1);
 267         if (ret == 1) {
 268                 /* We zero'd the count */
 269                 if (sctp_ifap->ifn_p) {
 270                         sctp_free_ifn(sctp_ifap->ifn_p);
 271                 }
 272                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 273                 atomic_subtract_int(&sctppcbinfo.ipi_count_ifas, 1);
 274         }
 275 }
 276
 277 static void
 278 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 279 {
 280         struct sctp_ifn *found;
 281
 282         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 283         if (found == NULL) {
 284                 /* Not in the list.. sorry */
 285                 return;
 286         }
 287         if (hold_addr_lock == 0)
 288                 SCTP_IPI_ADDR_WLOCK();
 289         LIST_REMOVE(sctp_ifnp, next_bucket);
 290         LIST_REMOVE(sctp_ifnp, next_ifn);
 291         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 292             sctp_ifnp->registered_af);
 293         if (hold_addr_lock == 0)
 294                 SCTP_IPI_ADDR_WUNLOCK();
 295         /* Take away the reference, and possibly free it */
 296         sctp_free_ifn(sctp_ifnp);
 297 }
 298
 299 void
 300 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 301     const char *if_name, uint32_t ifn_index)
 302 {
 303         struct sctp_vrf *vrf;
 304         struct sctp_ifa *sctp_ifap = NULL;
 305
 306         SCTP_IPI_ADDR_RLOCK();
 307         vrf = sctp_find_vrf(vrf_id);
 308         if (vrf == NULL) {
 309                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 310                 goto out;
 311
 312         }
 313         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 314         if (sctp_ifap == NULL) {
 315                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 316                 goto out;
 317         }
 318         if (sctp_ifap->ifn_p == NULL) {
 319                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 320                 goto out;
 321         }
 322         if (if_name) {
 323                 int len1, len2;
 324
 325                 len1 = strlen(if_name);
 326                 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
 327                 if (len1 != len2) {
 328                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n",
 329                             len1, len2);
 330                         goto out;
 331                 }
 332                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
 333                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 334                             sctp_ifap->ifn_p->ifn_name,
 335                             if_name);
 336                         goto out;
 337                 }
 338         } else {
 339                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 340                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 341                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 342                         goto out;
 343                 }
 344         }
 345
 346         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 347         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 348 out:
 349         SCTP_IPI_ADDR_RUNLOCK();
 350 }
 351
 352 void
 353 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 354     const char *if_name, uint32_t ifn_index)
 355 {
 356         struct sctp_vrf *vrf;
 357         struct sctp_ifa *sctp_ifap = NULL;
 358
 359         SCTP_IPI_ADDR_RLOCK();
 360         vrf = sctp_find_vrf(vrf_id);
 361         if (vrf == NULL) {
 362                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 363                 goto out;
 364
 365         }
 366         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 367         if (sctp_ifap == NULL) {
 368                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 369                 goto out;
 370         }
 371         if (sctp_ifap->ifn_p == NULL) {
 372                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 373                 goto out;
 374         }
 375         if (if_name) {
 376                 int len1, len2;
 377
 378                 len1 = strlen(if_name);
 379                 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
 380                 if (len1 != len2) {
 381                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n",
 382                             len1, len2);
 383                         goto out;
 384                 }
 385                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
 386                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 387                             sctp_ifap->ifn_p->ifn_name,
 388                             if_name);
 389                         goto out;
 390                 }
 391         } else {
 392                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 393                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 394                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 395                         goto out;
 396                 }
 397         }
 398
 399         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 400         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 401 out:
 402         SCTP_IPI_ADDR_RUNLOCK();
 403 }
 404
 405 /*-
 406  * Add an ifa to an ifn.
 407  * Register the interface as necessary.
 408  * NOTE: ADDR write lock MUST be held.
 409  */
 410 static void
 411 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 412 {
 413         int ifa_af;
 414
 415         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 416         sctp_ifap->ifn_p = sctp_ifnp;
 417         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 418         /* update address counts */
 419         sctp_ifnp->ifa_count++;
 420         ifa_af = sctp_ifap->address.sa.sa_family;
 421         if (ifa_af == AF_INET)
 422                 sctp_ifnp->num_v4++;
 423         else
 424                 sctp_ifnp->num_v6++;
 425         if (sctp_ifnp->ifa_count == 1) {
 426                 /* register the new interface */
 427                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 428                 sctp_ifnp->registered_af = ifa_af;
 429         }
 430 }
 431
 432 /*-
 433  * Remove an ifa from its ifn.
 434  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 435  * the interface based on the remaining address families left.
 436  * NOTE: ADDR write lock MUST be held.
 437  */
 438 static void
 439 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 440 {
 441         uint32_t ifn_index;
 442
 443         LIST_REMOVE(sctp_ifap, next_ifa);
 444         if (sctp_ifap->ifn_p) {
 445                 /* update address counts */
 446                 sctp_ifap->ifn_p->ifa_count--;
 447                 if (sctp_ifap->address.sa.sa_family == AF_INET6)
 448                         sctp_ifap->ifn_p->num_v6--;
 449                 else if (sctp_ifap->address.sa.sa_family == AF_INET)
 450                         sctp_ifap->ifn_p->num_v4--;
 451
 452                 ifn_index = sctp_ifap->ifn_p->ifn_index;
 453                 if (SCTP_LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 454                         /* remove the ifn, possibly freeing it */
 455                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 456                 } else {
 457                         /* re-register address family type, if needed */
 458                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 459                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 460                                 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET6);
 461                                 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET);
 462                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 463                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 464                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 465                                 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET);
 466                                 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET6);
 467                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 468                         }
 469                         /* free the ifn refcount */
 470                         sctp_free_ifn(sctp_ifap->ifn_p);
 471                 }
 472                 sctp_ifap->ifn_p = NULL;
 473         }
 474 }
 475
 476 struct sctp_ifa *
 477 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 478     uint32_t ifn_type, const char *if_name, void *ifa,
 479     struct sockaddr *addr, uint32_t ifa_flags,
 480     int dynamic_add)
 481 {
 482         struct sctp_vrf *vrf;
 483         struct sctp_ifn *sctp_ifnp = NULL;
 484         struct sctp_ifa *sctp_ifap = NULL;
 485         struct sctp_ifalist *hash_addr_head;
 486         struct sctp_ifnlist *hash_ifn_head;
 487         uint32_t hash_of_addr;
 488         int new_ifn_af = 0;
 489
 490 #ifdef SCTP_DEBUG
 491         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 492         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 493 #endif
 494         SCTP_IPI_ADDR_WLOCK();
 495         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 496         if (sctp_ifnp) {
 497                 vrf = sctp_ifnp->vrf;
 498         } else {
 499                 vrf = sctp_find_vrf(vrf_id);
 500                 if (vrf == NULL) {
 501                         vrf = sctp_allocate_vrf(vrf_id);
 502                         if (vrf == NULL) {
 503                                 SCTP_IPI_ADDR_WUNLOCK();
 504                                 return (NULL);
 505                         }
 506                 }
 507         }
 508         if (sctp_ifnp == NULL) {
 509                 /*
 510                  * build one and add it, can't hold lock until after malloc
 511                  * done though.
 512                  */
 513                 SCTP_IPI_ADDR_WUNLOCK();
 514                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 515                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 516                 if (sctp_ifnp == NULL) {
 517 #ifdef INVARIANTS
 518                         panic("No memory for IFN:%u", sctp_ifnp->ifn_index);
 519 #endif
 520                         return (NULL);
 521                 }
 522                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 523                 sctp_ifnp->ifn_index = ifn_index;
 524                 sctp_ifnp->ifn_p = ifn;
 525                 sctp_ifnp->ifn_type = ifn_type;
 526                 sctp_ifnp->refcount = 0;
 527                 sctp_ifnp->vrf = vrf;
 528                 atomic_add_int(&vrf->refcount, 1);
 529                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 530                 if (if_name != NULL) {
 531                         memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ);
 532                 } else {
 533                         memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ));
 534                 }
 535                 hash_ifn_head = &sctppcbinfo.vrf_ifn_hash[(ifn_index & sctppcbinfo.vrf_ifn_hashmark)];
 536                 LIST_INIT(&sctp_ifnp->ifalist);
 537                 SCTP_IPI_ADDR_WLOCK();
 538                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 539                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 540                 atomic_add_int(&sctppcbinfo.ipi_count_ifns, 1);
 541                 new_ifn_af = 1;
 542         }
 543         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 544         if (sctp_ifap) {
 545                 /* Hmm, it already exists? */
 546                 if ((sctp_ifap->ifn_p) &&
 547                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 548                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 549                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 550                             sctp_ifap);
 551                         if (new_ifn_af) {
 552                                 /* Remove the created one that we don't want */
 553                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 554                         }
 555                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 556                                 /* easy to solve, just switch back to active */
 557                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 558                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 559                                 sctp_ifap->ifn_p = sctp_ifnp;
 560                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 561                         }
 562         exit_stage_left:
 563                         SCTP_IPI_ADDR_WUNLOCK();
 564                         return (sctp_ifap);
 565                 } else {
 566                         if (sctp_ifap->ifn_p) {
 567                                 /*
 568                                  * The last IFN gets the address, removee
 569                                  * the old one
 570                                  */
 571                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 572                                     sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 573                                     sctp_ifap->ifn_p->ifn_index, if_name,
 574                                     ifn_index);
 575                                 /* remove the address from the old ifn */
 576                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 577                                 /* move the address over to the new ifn */
 578                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 579                                 goto exit_stage_left;
 580                         } else {
 581                                 /* repair ifnp which was NULL ? */
 582                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 583                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 584                                     sctp_ifnp, sctp_ifap);
 585                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 586                         }
 587                         goto exit_stage_left;
 588                 }
 589         }
 590         SCTP_IPI_ADDR_WUNLOCK();
 591         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 592         if (sctp_ifap == NULL) {
 593 #ifdef INVARIANTS
 594                 panic("No memory for IFA");
 595 #endif
 596                 return (NULL);
 597         }
 598         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 599         sctp_ifap->ifn_p = sctp_ifnp;
 600         atomic_add_int(&sctp_ifnp->refcount, 1);
 601         sctp_ifap->vrf_id = vrf_id;
 602         sctp_ifap->ifa = ifa;
 603         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 604         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 605         sctp_ifap->flags = ifa_flags;
 606         /* Set scope */
 607         if (sctp_ifap->address.sa.sa_family == AF_INET) {
 608                 struct sockaddr_in *sin;
 609
 610                 sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
 611                 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 612                     (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 613                         sctp_ifap->src_is_loop = 1;
 614                 }
 615                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 616                         sctp_ifap->src_is_priv = 1;
 617                 }
 618                 sctp_ifnp->num_v4++;
 619                 if (new_ifn_af)
 620                         new_ifn_af = AF_INET;
 621         } else if (sctp_ifap->address.sa.sa_family == AF_INET6) {
 622                 /* ok to use deprecated addresses? */
 623                 struct sockaddr_in6 *sin6;
 624
 625                 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
 626                 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 627                     (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 628                         sctp_ifap->src_is_loop = 1;
 629                 }
 630                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 631                         sctp_ifap->src_is_priv = 1;
 632                 }
 633                 sctp_ifnp->num_v6++;
 634                 if (new_ifn_af)
 635                         new_ifn_af = AF_INET6;
 636         } else {
 637                 new_ifn_af = 0;
 638         }
 639         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 640
 641         if ((sctp_ifap->src_is_priv == 0) &&
 642             (sctp_ifap->src_is_loop == 0)) {
 643                 sctp_ifap->src_is_glob = 1;
 644         }
 645         SCTP_IPI_ADDR_WLOCK();
 646         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 647         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 648         sctp_ifap->refcount = 1;
 649         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 650         sctp_ifnp->ifa_count++;
 651         vrf->total_ifa_count++;
 652         atomic_add_int(&sctppcbinfo.ipi_count_ifas, 1);
 653         if (new_ifn_af) {
 654                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 655                 sctp_ifnp->registered_af = new_ifn_af;
 656         }
 657         SCTP_IPI_ADDR_WUNLOCK();
 658         if (dynamic_add) {
 659                 /*
 660                  * Bump up the refcount so that when the timer completes it
 661                  * will drop back down.
 662                  */
 663                 struct sctp_laddr *wi;
 664
 665                 atomic_add_int(&sctp_ifap->refcount, 1);
 666                 wi = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
 667                 if (wi == NULL) {
 668                         /*
 669                          * Gak, what can we do? We have lost an address
 670                          * change can you say HOSED?
 671                          */
 672                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 673                         /* Opps, must decrement the count */
 674                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 675                             if_name);
 676                         return (NULL);
 677                 }
 678                 SCTP_INCR_LADDR_COUNT();
 679                 bzero(wi, sizeof(*wi));
 680                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 681                 wi->ifa = sctp_ifap;
 682                 wi->action = SCTP_ADD_IP_ADDRESS;
 683                 SCTP_IPI_ITERATOR_WQ_LOCK();
 684                 /*
 685                  * Should this really be a tailq? As it is we will process
 686                  * the newest first :-0
 687                  */
 688                 LIST_INSERT_HEAD(&sctppcbinfo.addr_wq, wi, sctp_nxt_addr);
 689                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
 690                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 691                     (struct sctp_inpcb *)NULL,
 692                     (struct sctp_tcb *)NULL,
 693                     (struct sctp_nets *)NULL);
 694         } else {
 695                 /* it's ready for use */
 696                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 697         }
 698         return (sctp_ifap);
 699 }
 700
 701 void
 702 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 703     uint32_t ifn_index, const char *if_name)
 704 {
 705         struct sctp_vrf *vrf;
 706         struct sctp_ifa *sctp_ifap = NULL;
 707
 708         SCTP_IPI_ADDR_WLOCK();
 709         vrf = sctp_find_vrf(vrf_id);
 710         if (vrf == NULL) {
 711                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 712                 goto out_now;
 713         }
 714 #ifdef SCTP_DEBUG
 715         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 716         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 717 #endif
 718         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 719         if (sctp_ifap) {
 720                 /* Validate the delete */
 721                 if (sctp_ifap->ifn_p) {
 722                         int valid = 0;
 723
 724                         /*-
 725                          * The name has priority over the ifn_index
 726                          * if its given. We do this especially for
 727                          * panda who might recycle indexes fast.
 728                          */
 729                         if (if_name) {
 730                                 int len1, len2;
 731
 732                                 len1 = min(SCTP_IFNAMSIZ, strlen(if_name));
 733                                 len2 = min(SCTP_IFNAMSIZ, strlen(sctp_ifap->ifn_p->ifn_name));
 734                                 if (len1 && len2 && (len1 == len2)) {
 735                                         /* we can compare them */
 736                                         if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) == 0) {
 737                                                 /*
 738                                                  * They match its a correct
 739                                                  * delete
 740                                                  */
 741                                                 valid = 1;
 742                                         }
 743                                 }
 744                         }
 745                         if (!valid) {
 746                                 /* last ditch check ifn_index */
 747                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 748                                         valid = 1;
 749                                 }
 750                         }
 751                         if (!valid) {
 752                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 753                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 754                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 755                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 756                                 SCTP_IPI_ADDR_WUNLOCK();
 757                                 return;
 758                         }
 759                 }
 760                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap);
 761                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 762                 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
 763                 vrf->total_ifa_count--;
 764                 LIST_REMOVE(sctp_ifap, next_bucket);
 765                 sctp_remove_ifa_from_ifn(sctp_ifap);
 766         }
 767 #ifdef SCTP_DEBUG
 768         else {
 769                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 770                     ifn_index);
 771                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 772         }
 773 #endif
 774
 775 out_now:
 776         SCTP_IPI_ADDR_WUNLOCK();
 777         if (sctp_ifap) {
 778                 struct sctp_laddr *wi;
 779
 780                 wi = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
 781                 if (wi == NULL) {
 782                         /*
 783                          * Gak, what can we do? We have lost an address
 784                          * change can you say HOSED?
 785                          */
 786                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 787
 788                         /* Oops, must decrement the count */
 789                         sctp_free_ifa(sctp_ifap);
 790                         return;
 791                 }
 792                 SCTP_INCR_LADDR_COUNT();
 793                 bzero(wi, sizeof(*wi));
 794                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 795                 wi->ifa = sctp_ifap;
 796                 wi->action = SCTP_DEL_IP_ADDRESS;
 797                 SCTP_IPI_ITERATOR_WQ_LOCK();
 798                 /*
 799                  * Should this really be a tailq? As it is we will process
 800                  * the newest first :-0
 801                  */
 802                 LIST_INSERT_HEAD(&sctppcbinfo.addr_wq, wi, sctp_nxt_addr);
 803                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
 804
 805                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 806                     (struct sctp_inpcb *)NULL,
 807                     (struct sctp_tcb *)NULL,
 808                     (struct sctp_nets *)NULL);
 809         }
 810         return;
 811 }
 812
 813
 814 static struct sctp_tcb *
 815 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 816     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
 817 {
 818         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
 819         /*
 820          * If we support the TCP model, then we must now dig through to see
 821          * if we can find our endpoint in the list of tcp ep's.
 822          */
 823         uint16_t lport, rport;
 824         struct sctppcbhead *ephead;
 825         struct sctp_inpcb *inp;
 826         struct sctp_laddr *laddr;
 827         struct sctp_tcb *stcb;
 828         struct sctp_nets *net;
 829
 830         if ((to == NULL) || (from == NULL)) {
 831                 return (NULL);
 832         }
 833         if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
 834                 lport = ((struct sockaddr_in *)to)->sin_port;
 835                 rport = ((struct sockaddr_in *)from)->sin_port;
 836         } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
 837                 lport = ((struct sockaddr_in6 *)to)->sin6_port;
 838                 rport = ((struct sockaddr_in6 *)from)->sin6_port;
 839         } else {
 840                 return NULL;
 841         }
 842         ephead = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR(
 843             (lport + rport), sctppcbinfo.hashtcpmark)];
 844         /*
 845          * Ok now for each of the guys in this bucket we must look and see:
 846          * - Does the remote port match. - Does there single association's
 847          * addresses match this address (to). If so we update p_ep to point
 848          * to this ep and return the tcb from it.
 849          */
 850         LIST_FOREACH(inp, ephead, sctp_hash) {
 851                 SCTP_INP_RLOCK(inp);
 852                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 853                         SCTP_INP_RUNLOCK(inp);
 854                         continue;
 855                 }
 856                 if (lport != inp->sctp_lport) {
 857                         SCTP_INP_RUNLOCK(inp);
 858                         continue;
 859                 }
 860                 if (inp->def_vrf_id != vrf_id) {
 861                         SCTP_INP_RUNLOCK(inp);
 862                         continue;
 863                 }
 864                 /* check to see if the ep has one of the addresses */
 865                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 866                         /* We are NOT bound all, so look further */
 867                         int match = 0;
 868
 869                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 870
 871                                 if (laddr->ifa == NULL) {
 872                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
 873                                         continue;
 874                                 }
 875                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 876                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 877                                         continue;
 878                                 }
 879                                 if (laddr->ifa->address.sa.sa_family ==
 880                                     to->sa_family) {
 881                                         /* see if it matches */
 882                                         struct sockaddr_in *intf_addr, *sin;
 883
 884                                         intf_addr = &laddr->ifa->address.sin;
 885                                         sin = (struct sockaddr_in *)to;
 886                                         if (from->sa_family == AF_INET) {
 887                                                 if (sin->sin_addr.s_addr ==
 888                                                     intf_addr->sin_addr.s_addr) {
 889                                                         match = 1;
 890                                                         break;
 891                                                 }
 892                                         } else {
 893                                                 struct sockaddr_in6 *intf_addr6;
 894                                                 struct sockaddr_in6 *sin6;
 895
 896                                                 sin6 = (struct sockaddr_in6 *)
 897                                                     to;
 898                                                 intf_addr6 = &laddr->ifa->address.sin6;
 899
 900                                                 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 901                                                     &intf_addr6->sin6_addr)) {
 902                                                         match = 1;
 903                                                         break;
 904                                                 }
 905                                         }
 906                                 }
 907                         }
 908                         if (match == 0) {
 909                                 /* This endpoint does not have this address */
 910                                 SCTP_INP_RUNLOCK(inp);
 911                                 continue;
 912                         }
 913                 }
 914                 /*
 915                  * Ok if we hit here the ep has the address, does it hold
 916                  * the tcb?
 917                  */
 918
 919                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 920                 if (stcb == NULL) {
 921                         SCTP_INP_RUNLOCK(inp);
 922                         continue;
 923                 }
 924                 SCTP_TCB_LOCK(stcb);
 925                 if (stcb->rport != rport) {
 926                         /* remote port does not match. */
 927                         SCTP_TCB_UNLOCK(stcb);
 928                         SCTP_INP_RUNLOCK(inp);
 929                         continue;
 930                 }
 931                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 932                         SCTP_TCB_UNLOCK(stcb);
 933                         SCTP_INP_RUNLOCK(inp);
 934                         continue;
 935                 }
 936                 /* Does this TCB have a matching address? */
 937                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 938
 939                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
 940                                 /* not the same family, can't be a match */
 941                                 continue;
 942                         }
 943                         if (from->sa_family == AF_INET) {
 944                                 struct sockaddr_in *sin, *rsin;
 945
 946                                 sin = (struct sockaddr_in *)&net->ro._l_addr;
 947                                 rsin = (struct sockaddr_in *)from;
 948                                 if (sin->sin_addr.s_addr ==
 949                                     rsin->sin_addr.s_addr) {
 950                                         /* found it */
 951                                         if (netp != NULL) {
 952                                                 *netp = net;
 953                                         }
 954                                         /* Update the endpoint pointer */
 955                                         *inp_p = inp;
 956                                         SCTP_INP_RUNLOCK(inp);
 957                                         return (stcb);
 958                                 }
 959                         } else {
 960                                 struct sockaddr_in6 *sin6, *rsin6;
 961
 962                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 963                                 rsin6 = (struct sockaddr_in6 *)from;
 964                                 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 965                                     &rsin6->sin6_addr)) {
 966                                         /* found it */
 967                                         if (netp != NULL) {
 968                                                 *netp = net;
 969                                         }
 970                                         /* Update the endpoint pointer */
 971                                         *inp_p = inp;
 972                                         SCTP_INP_RUNLOCK(inp);
 973                                         return (stcb);
 974                                 }
 975                         }
 976                 }
 977                 SCTP_TCB_UNLOCK(stcb);
 978                 SCTP_INP_RUNLOCK(inp);
 979         }
 980         return (NULL);
 981 }
 982
 983 /*
 984  * rules for use
 985  *
 986  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
 987  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
 988  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
 989  * NULL.
 990  */
 991
 992 struct sctp_tcb *
 993 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
 994     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
 995 {
 996         struct sctpasochead *head;
 997         struct sctp_inpcb *inp;
 998         struct sctp_tcb *stcb = NULL;
 999         struct sctp_nets *net;
1000         uint16_t rport;
1001
1002         inp = *inp_p;
1003         if (remote->sa_family == AF_INET) {
1004                 rport = (((struct sockaddr_in *)remote)->sin_port);
1005         } else if (remote->sa_family == AF_INET6) {
1006                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1007         } else {
1008                 return (NULL);
1009         }
1010         if (locked_tcb) {
1011                 /*
1012                  * UN-lock so we can do proper locking here this occurs when
1013                  * called from load_addresses_from_init.
1014                  */
1015                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1016                 SCTP_TCB_UNLOCK(locked_tcb);
1017         }
1018         SCTP_INP_INFO_RLOCK();
1019         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
1020                 /*-
1021                  * Now either this guy is our listener or it's the
1022                  * connector. If it is the one that issued the connect, then
1023                  * it's only chance is to be the first TCB in the list. If
1024                  * it is the acceptor, then do the special_lookup to hash
1025                  * and find the real inp.
1026                  */
1027                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1028                         /* to is peer addr, from is my addr */
1029                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1030                             netp, inp->def_vrf_id);
1031                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1032                                 /* we have a locked tcb, lower refcount */
1033                                 SCTP_INP_DECR_REF(inp);
1034                         }
1035                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1036                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1037                                 SCTP_TCB_LOCK(locked_tcb);
1038                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1039                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1040                         }
1041                         SCTP_INP_INFO_RUNLOCK();
1042                         return (stcb);
1043                 } else {
1044                         SCTP_INP_WLOCK(inp);
1045                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1046                                 goto null_return;
1047                         }
1048                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1049                         if (stcb == NULL) {
1050                                 goto null_return;
1051                         }
1052                         SCTP_TCB_LOCK(stcb);
1053
1054                         if (stcb->rport != rport) {
1055                                 /* remote port does not match. */
1056                                 SCTP_TCB_UNLOCK(stcb);
1057                                 goto null_return;
1058                         }
1059                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1060                                 SCTP_TCB_UNLOCK(stcb);
1061                                 goto null_return;
1062                         }
1063                         /* now look at the list of remote addresses */
1064                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1065 #ifdef INVARIANTS
1066                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1067                                         panic("Corrupt net list");
1068                                 }
1069 #endif
1070                                 if (net->ro._l_addr.sa.sa_family !=
1071                                     remote->sa_family) {
1072                                         /* not the same family */
1073                                         continue;
1074                                 }
1075                                 if (remote->sa_family == AF_INET) {
1076                                         struct sockaddr_in *sin, *rsin;
1077
1078                                         sin = (struct sockaddr_in *)
1079                                             &net->ro._l_addr;
1080                                         rsin = (struct sockaddr_in *)remote;
1081                                         if (sin->sin_addr.s_addr ==
1082                                             rsin->sin_addr.s_addr) {
1083                                                 /* found it */
1084                                                 if (netp != NULL) {
1085                                                         *netp = net;
1086                                                 }
1087                                                 if (locked_tcb == NULL) {
1088                                                         SCTP_INP_DECR_REF(inp);
1089                                                 } else if (locked_tcb != stcb) {
1090                                                         SCTP_TCB_LOCK(locked_tcb);
1091                                                 }
1092                                                 if (locked_tcb) {
1093                                                         atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1094                                                 }
1095                                                 SCTP_INP_WUNLOCK(inp);
1096                                                 SCTP_INP_INFO_RUNLOCK();
1097                                                 return (stcb);
1098                                         }
1099                                 } else if (remote->sa_family == AF_INET6) {
1100                                         struct sockaddr_in6 *sin6, *rsin6;
1101
1102                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1103                                         rsin6 = (struct sockaddr_in6 *)remote;
1104                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
1105                                             &rsin6->sin6_addr)) {
1106                                                 /* found it */
1107                                                 if (netp != NULL) {
1108                                                         *netp = net;
1109                                                 }
1110                                                 if (locked_tcb == NULL) {
1111                                                         SCTP_INP_DECR_REF(inp);
1112                                                 } else if (locked_tcb != stcb) {
1113                                                         SCTP_TCB_LOCK(locked_tcb);
1114                                                 }
1115                                                 if (locked_tcb) {
1116                                                         atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1117                                                 }
1118                                                 SCTP_INP_WUNLOCK(inp);
1119                                                 SCTP_INP_INFO_RUNLOCK();
1120                                                 return (stcb);
1121                                         }
1122                                 }
1123                         }
1124                         SCTP_TCB_UNLOCK(stcb);
1125                 }
1126         } else {
1127                 SCTP_INP_WLOCK(inp);
1128                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1129                         goto null_return;
1130                 }
1131                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1132                     inp->sctp_hashmark)];
1133                 if (head == NULL) {
1134                         goto null_return;
1135                 }
1136                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1137                         if (stcb->rport != rport) {
1138                                 /* remote port does not match */
1139                                 continue;
1140                         }
1141                         SCTP_TCB_LOCK(stcb);
1142                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1143                                 SCTP_TCB_UNLOCK(stcb);
1144                                 continue;
1145                         }
1146                         /* now look at the list of remote addresses */
1147                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1148 #ifdef INVARIANTS
1149                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1150                                         panic("Corrupt net list");
1151                                 }
1152 #endif
1153                                 if (net->ro._l_addr.sa.sa_family !=
1154                                     remote->sa_family) {
1155                                         /* not the same family */
1156                                         continue;
1157                                 }
1158                                 if (remote->sa_family == AF_INET) {
1159                                         struct sockaddr_in *sin, *rsin;
1160
1161                                         sin = (struct sockaddr_in *)
1162                                             &net->ro._l_addr;
1163                                         rsin = (struct sockaddr_in *)remote;
1164                                         if (sin->sin_addr.s_addr ==
1165                                             rsin->sin_addr.s_addr) {
1166                                                 /* found it */
1167                                                 if (netp != NULL) {
1168                                                         *netp = net;
1169                                                 }
1170                                                 if (locked_tcb == NULL) {
1171                                                         SCTP_INP_DECR_REF(inp);
1172                                                 } else if (locked_tcb != stcb) {
1173                                                         SCTP_TCB_LOCK(locked_tcb);
1174                                                 }
1175                                                 if (locked_tcb) {
1176                                                         atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1177                                                 }
1178                                                 SCTP_INP_WUNLOCK(inp);
1179                                                 SCTP_INP_INFO_RUNLOCK();
1180                                                 return (stcb);
1181                                         }
1182                                 } else if (remote->sa_family == AF_INET6) {
1183                                         struct sockaddr_in6 *sin6, *rsin6;
1184
1185                                         sin6 = (struct sockaddr_in6 *)
1186                                             &net->ro._l_addr;
1187                                         rsin6 = (struct sockaddr_in6 *)remote;
1188                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
1189                                             &rsin6->sin6_addr)) {
1190                                                 /* found it */
1191                                                 if (netp != NULL) {
1192                                                         *netp = net;
1193                                                 }
1194                                                 if (locked_tcb == NULL) {
1195                                                         SCTP_INP_DECR_REF(inp);
1196                                                 } else if (locked_tcb != stcb) {
1197                                                         SCTP_TCB_LOCK(locked_tcb);
1198                                                 }
1199                                                 if (locked_tcb) {
1200                                                         atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1201                                                 }
1202                                                 SCTP_INP_WUNLOCK(inp);
1203                                                 SCTP_INP_INFO_RUNLOCK();
1204                                                 return (stcb);
1205                                         }
1206                                 }
1207                         }
1208                         SCTP_TCB_UNLOCK(stcb);
1209                 }
1210         }
1211 null_return:
1212         /* clean up for returning null */
1213         if (locked_tcb) {
1214                 SCTP_TCB_LOCK(locked_tcb);
1215                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1216         }
1217         SCTP_INP_WUNLOCK(inp);
1218         SCTP_INP_INFO_RUNLOCK();
1219         /* not found */
1220         return (NULL);
1221 }
1222
1223 /*
1224  * Find an association for a specific endpoint using the association id given
1225  * out in the COMM_UP notification
1226  */
1227
1228 struct sctp_tcb *
1229 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1230 {
1231         /*
1232          * Use my the assoc_id to find a endpoint
1233          */
1234         struct sctpasochead *head;
1235         struct sctp_tcb *stcb;
1236         uint32_t id;
1237
1238         if (asoc_id == 0 || inp == NULL) {
1239                 return (NULL);
1240         }
1241         SCTP_INP_INFO_RLOCK();
1242         id = (uint32_t) asoc_id;
1243         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(id,
1244             sctppcbinfo.hashasocmark)];
1245         if (head == NULL) {
1246                 /* invalid id TSNH */
1247                 SCTP_INP_INFO_RUNLOCK();
1248                 return (NULL);
1249         }
1250         LIST_FOREACH(stcb, head, sctp_asocs) {
1251                 SCTP_INP_RLOCK(stcb->sctp_ep);
1252                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1253                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1254                         SCTP_INP_INFO_RUNLOCK();
1255                         return (NULL);
1256                 }
1257                 if (stcb->asoc.assoc_id == id) {
1258                         /* candidate */
1259                         if (inp != stcb->sctp_ep) {
1260                                 /*
1261                                  * some other guy has the same id active (id
1262                                  * collision ??).
1263                                  */
1264                                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1265                                 continue;
1266                         }
1267                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1268                                 continue;
1269                         }
1270                         if (want_lock) {
1271                                 SCTP_TCB_LOCK(stcb);
1272                         }
1273                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1274                         SCTP_INP_INFO_RUNLOCK();
1275                         return (stcb);
1276                 }
1277                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1278         }
1279         /* Ok if we missed here, lets try the restart hash */
1280         head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(id, sctppcbinfo.hashrestartmark)];
1281         if (head == NULL) {
1282                 /* invalid id TSNH */
1283                 SCTP_INP_INFO_RUNLOCK();
1284                 return (NULL);
1285         }
1286         LIST_FOREACH(stcb, head, sctp_tcbrestarhash) {
1287                 SCTP_INP_RLOCK(stcb->sctp_ep);
1288                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1289                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1290                         continue;
1291                 }
1292                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1293                         continue;
1294                 }
1295                 if (want_lock) {
1296                         SCTP_TCB_LOCK(stcb);
1297                 }
1298                 if (stcb->asoc.assoc_id == id) {
1299                         /* candidate */
1300                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1301                         if (inp != stcb->sctp_ep) {
1302                                 /*
1303                                  * some other guy has the same id active (id
1304                                  * collision ??).
1305                                  */
1306                                 if (want_lock) {
1307                                         SCTP_TCB_UNLOCK(stcb);
1308                                 }
1309                                 continue;
1310                         }
1311                         SCTP_INP_INFO_RUNLOCK();
1312                         return (stcb);
1313                 } else {
1314                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1315                 }
1316                 if (want_lock) {
1317                         SCTP_TCB_UNLOCK(stcb);
1318                 }
1319         }
1320         SCTP_INP_INFO_RUNLOCK();
1321         return (NULL);
1322 }
1323
1324
1325 static struct sctp_inpcb *
1326 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1327     uint16_t lport, uint32_t vrf_id)
1328 {
1329         struct sctp_inpcb *inp;
1330         struct sockaddr_in *sin;
1331         struct sockaddr_in6 *sin6;
1332         struct sctp_laddr *laddr;
1333         int fnd;
1334
1335         /*
1336          * Endpoing probe expects that the INP_INFO is locked.
1337          */
1338         if (nam->sa_family == AF_INET) {
1339                 sin = (struct sockaddr_in *)nam;
1340                 sin6 = NULL;
1341         } else if (nam->sa_family == AF_INET6) {
1342                 sin6 = (struct sockaddr_in6 *)nam;
1343                 sin = NULL;
1344         } else {
1345                 /* unsupported family */
1346                 return (NULL);
1347         }
1348         if (head == NULL)
1349                 return (NULL);
1350         LIST_FOREACH(inp, head, sctp_hash) {
1351                 SCTP_INP_RLOCK(inp);
1352                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1353                         SCTP_INP_RUNLOCK(inp);
1354                         continue;
1355                 }
1356                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1357                     (inp->sctp_lport == lport)) {
1358                         /* got it */
1359                         if ((nam->sa_family == AF_INET) &&
1360                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1361                             SCTP_IPV6_V6ONLY(inp)) {
1362                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1363                                 SCTP_INP_RUNLOCK(inp);
1364                                 continue;
1365                         }
1366                         /* A V6 address and the endpoint is NOT bound V6 */
1367                         if (nam->sa_family == AF_INET6 &&
1368                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1369                                 SCTP_INP_RUNLOCK(inp);
1370                                 continue;
1371                         }
1372                         /* does a VRF id match? */
1373                         fnd = 0;
1374                         if (inp->def_vrf_id == vrf_id)
1375                                 fnd = 1;
1376
1377                         SCTP_INP_RUNLOCK(inp);
1378                         if (!fnd)
1379                                 continue;
1380                         return (inp);
1381                 }
1382                 SCTP_INP_RUNLOCK(inp);
1383         }
1384
1385         if ((nam->sa_family == AF_INET) &&
1386             (sin->sin_addr.s_addr == INADDR_ANY)) {
1387                 /* Can't hunt for one that has no address specified */
1388                 return (NULL);
1389         } else if ((nam->sa_family == AF_INET6) &&
1390             (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
1391                 /* Can't hunt for one that has no address specified */
1392                 return (NULL);
1393         }
1394         /*
1395          * ok, not bound to all so see if we can find a EP bound to this
1396          * address.
1397          */
1398         LIST_FOREACH(inp, head, sctp_hash) {
1399                 SCTP_INP_RLOCK(inp);
1400                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1401                         SCTP_INP_RUNLOCK(inp);
1402                         continue;
1403                 }
1404                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1405                         SCTP_INP_RUNLOCK(inp);
1406                         continue;
1407                 }
1408                 /*
1409                  * Ok this could be a likely candidate, look at all of its
1410                  * addresses
1411                  */
1412                 if (inp->sctp_lport != lport) {
1413                         SCTP_INP_RUNLOCK(inp);
1414                         continue;
1415                 }
1416                 /* does a VRF id match? */
1417                 fnd = 0;
1418                 if (inp->def_vrf_id == vrf_id)
1419                         fnd = 1;
1420
1421                 if (!fnd) {
1422                         SCTP_INP_RUNLOCK(inp);
1423                         continue;
1424                 }
1425                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1426                         if (laddr->ifa == NULL) {
1427                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1428                                     __FUNCTION__);
1429                                 continue;
1430                         }
1431                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1432                             laddr->ifa);
1433                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1434                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1435                                 continue;
1436                         }
1437                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1438                                 /* possible, see if it matches */
1439                                 struct sockaddr_in *intf_addr;
1440
1441                                 intf_addr = &laddr->ifa->address.sin;
1442                                 if (nam->sa_family == AF_INET) {
1443                                         if (sin->sin_addr.s_addr ==
1444                                             intf_addr->sin_addr.s_addr) {
1445                                                 SCTP_INP_RUNLOCK(inp);
1446                                                 return (inp);
1447                                         }
1448                                 } else if (nam->sa_family == AF_INET6) {
1449                                         struct sockaddr_in6 *intf_addr6;
1450
1451                                         intf_addr6 = &laddr->ifa->address.sin6;
1452                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
1453                                             &intf_addr6->sin6_addr)) {
1454                                                 SCTP_INP_RUNLOCK(inp);
1455                                                 return (inp);
1456                                         }
1457                                 }
1458                         }
1459                 }
1460                 SCTP_INP_RUNLOCK(inp);
1461         }
1462         return (NULL);
1463 }
1464
1465 struct sctp_inpcb *
1466 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1467     uint32_t vrf_id)
1468 {
1469         /*
1470          * First we check the hash table to see if someone has this port
1471          * bound with just the port.
1472          */
1473         struct sctp_inpcb *inp;
1474         struct sctppcbhead *head;
1475         struct sockaddr_in *sin;
1476         struct sockaddr_in6 *sin6;
1477         int lport;
1478
1479         if (nam->sa_family == AF_INET) {
1480                 sin = (struct sockaddr_in *)nam;
1481                 lport = ((struct sockaddr_in *)nam)->sin_port;
1482         } else if (nam->sa_family == AF_INET6) {
1483                 sin6 = (struct sockaddr_in6 *)nam;
1484                 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
1485         } else {
1486                 /* unsupported family */
1487                 return (NULL);
1488         }
1489         /*
1490          * I could cheat here and just cast to one of the types but we will
1491          * do it right. It also provides the check against an Unsupported
1492          * type too.
1493          */
1494         /* Find the head of the ALLADDR chain */
1495         if (have_lock == 0) {
1496                 SCTP_INP_INFO_RLOCK();
1497         }
1498         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
1499             sctppcbinfo.hashmark)];
1500         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1501
1502         /*
1503          * If the TCP model exists it could be that the main listening
1504          * endpoint is gone but there exists a connected socket for this guy
1505          * yet. If so we can return the first one that we find. This may NOT
1506          * be the correct one but the sctp_findassociation_ep_addr has
1507          * further code to look at all TCP models.
1508          */
1509         if (inp == NULL && find_tcp_pool) {
1510                 unsigned int i;
1511
1512                 for (i = 0; i < sctppcbinfo.hashtblsize; i++) {
1513                         /*
1514                          * This is real gross, but we do NOT have a remote
1515                          * port at this point depending on who is calling.
1516                          * We must therefore look for ANY one that matches
1517                          * our local port :/
1518                          */
1519                         head = &sctppcbinfo.sctp_tcpephash[i];
1520                         if (LIST_FIRST(head)) {
1521                                 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1522                                 if (inp) {
1523                                         /* Found one */
1524                                         break;
1525                                 }
1526                         }
1527                 }
1528         }
1529         if (inp) {
1530                 SCTP_INP_INCR_REF(inp);
1531         }
1532         if (have_lock == 0) {
1533                 SCTP_INP_INFO_RUNLOCK();
1534         }
1535         return (inp);
1536 }
1537
1538 /*
1539  * Find an association for an endpoint with the pointer to whom you want to
1540  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1541  * need to change the *to to some other struct like a mbuf...
1542  */
1543 struct sctp_tcb *
1544 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1545     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1546     uint32_t vrf_id)
1547 {
1548         struct sctp_inpcb *inp = NULL;
1549         struct sctp_tcb *retval;
1550
1551         SCTP_INP_INFO_RLOCK();
1552         if (find_tcp_pool) {
1553                 if (inp_p != NULL) {
1554                         retval = sctp_tcb_special_locate(inp_p, from, to, netp,
1555                             vrf_id);
1556                 } else {
1557                         retval = sctp_tcb_special_locate(&inp, from, to, netp,
1558                             vrf_id);
1559                 }
1560                 if (retval != NULL) {
1561                         SCTP_INP_INFO_RUNLOCK();
1562                         return (retval);
1563                 }
1564         }
1565         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1566         if (inp_p != NULL) {
1567                 *inp_p = inp;
1568         }
1569         SCTP_INP_INFO_RUNLOCK();
1570
1571         if (inp == NULL) {
1572                 return (NULL);
1573         }
1574         /*
1575          * ok, we have an endpoint, now lets find the assoc for it (if any)
1576          * we now place the source address or from in the to of the find
1577          * endpoint call. Since in reality this chain is used from the
1578          * inbound packet side.
1579          */
1580         if (inp_p != NULL) {
1581                 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1582                     NULL);
1583         } else {
1584                 retval = sctp_findassociation_ep_addr(&inp, from, netp, to,
1585                     NULL);
1586         }
1587         return retval;
1588 }
1589
1590
1591 /*
1592  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1593  * find all addresses that the sender has specified in any address list. Each
1594  * address will be used to lookup the TCB and see if one exits.
1595  */
1596 static struct sctp_tcb *
1597 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1598     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1599     struct sockaddr *dest)
1600 {
1601         struct sockaddr_in sin4;
1602         struct sockaddr_in6 sin6;
1603         struct sctp_paramhdr *phdr, parm_buf;
1604         struct sctp_tcb *retval;
1605         uint32_t ptype, plen;
1606
1607         memset(&sin4, 0, sizeof(sin4));
1608         memset(&sin6, 0, sizeof(sin6));
1609         sin4.sin_len = sizeof(sin4);
1610         sin4.sin_family = AF_INET;
1611         sin4.sin_port = sh->src_port;
1612         sin6.sin6_len = sizeof(sin6);
1613         sin6.sin6_family = AF_INET6;
1614         sin6.sin6_port = sh->src_port;
1615
1616         retval = NULL;
1617         offset += sizeof(struct sctp_init_chunk);
1618
1619         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1620         while (phdr != NULL) {
1621                 /* now we must see if we want the parameter */
1622                 ptype = ntohs(phdr->param_type);
1623                 plen = ntohs(phdr->param_length);
1624                 if (plen == 0) {
1625                         break;
1626                 }
1627                 if (ptype == SCTP_IPV4_ADDRESS &&
1628                     plen == sizeof(struct sctp_ipv4addr_param)) {
1629                         /* Get the rest of the address */
1630                         struct sctp_ipv4addr_param ip4_parm, *p4;
1631
1632                         phdr = sctp_get_next_param(m, offset,
1633                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
1634                         if (phdr == NULL) {
1635                                 return (NULL);
1636                         }
1637                         p4 = (struct sctp_ipv4addr_param *)phdr;
1638                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
1639                         /* look it up */
1640                         retval = sctp_findassociation_ep_addr(inp_p,
1641                             (struct sockaddr *)&sin4, netp, dest, NULL);
1642                         if (retval != NULL) {
1643                                 return (retval);
1644                         }
1645                 } else if (ptype == SCTP_IPV6_ADDRESS &&
1646                     plen == sizeof(struct sctp_ipv6addr_param)) {
1647                         /* Get the rest of the address */
1648                         struct sctp_ipv6addr_param ip6_parm, *p6;
1649
1650                         phdr = sctp_get_next_param(m, offset,
1651                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
1652                         if (phdr == NULL) {
1653                                 return (NULL);
1654                         }
1655                         p6 = (struct sctp_ipv6addr_param *)phdr;
1656                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
1657                         /* look it up */
1658                         retval = sctp_findassociation_ep_addr(inp_p,
1659                             (struct sockaddr *)&sin6, netp, dest, NULL);
1660                         if (retval != NULL) {
1661                                 return (retval);
1662                         }
1663                 }
1664                 offset += SCTP_SIZE32(plen);
1665                 phdr = sctp_get_next_param(m, offset, &parm_buf,
1666                     sizeof(parm_buf));
1667         }
1668         return (NULL);
1669 }
1670
1671
1672 static struct sctp_tcb *
1673 sctp_findassoc_by_vtag(struct sockaddr *from, uint32_t vtag,
1674     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
1675     uint16_t lport, int skip_src_check)
1676 {
1677         /*
1678          * Use my vtag to hash. If we find it we then verify the source addr
1679          * is in the assoc. If all goes well we save a bit on rec of a
1680          * packet.
1681          */
1682         struct sctpasochead *head;
1683         struct sctp_nets *net;
1684         struct sctp_tcb *stcb;
1685
1686         *netp = NULL;
1687         *inp_p = NULL;
1688         SCTP_INP_INFO_RLOCK();
1689         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag,
1690             sctppcbinfo.hashasocmark)];
1691         if (head == NULL) {
1692                 /* invalid vtag */
1693                 SCTP_INP_INFO_RUNLOCK();
1694                 return (NULL);
1695         }
1696         LIST_FOREACH(stcb, head, sctp_asocs) {
1697                 SCTP_INP_RLOCK(stcb->sctp_ep);
1698                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1699                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1700                         continue;
1701                 }
1702                 SCTP_TCB_LOCK(stcb);
1703                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1704                 if (stcb->asoc.my_vtag == vtag) {
1705                         /* candidate */
1706                         if (stcb->rport != rport) {
1707                                 /*
1708                                  * we could remove this if vtags are unique
1709                                  * across the system.
1710                                  */
1711                                 SCTP_TCB_UNLOCK(stcb);
1712                                 continue;
1713                         }
1714                         if (stcb->sctp_ep->sctp_lport != lport) {
1715                                 /*
1716                                  * we could remove this if vtags are unique
1717                                  * across the system.
1718                                  */
1719                                 SCTP_TCB_UNLOCK(stcb);
1720                                 continue;
1721                         }
1722                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1723                                 SCTP_TCB_UNLOCK(stcb);
1724                                 continue;
1725                         }
1726                         if (skip_src_check) {
1727                                 *netp = NULL;   /* unknown */
1728                                 if (inp_p)
1729                                         *inp_p = stcb->sctp_ep;
1730                                 SCTP_INP_INFO_RUNLOCK();
1731                                 return (stcb);
1732                         }
1733                         net = sctp_findnet(stcb, from);
1734                         if (net) {
1735                                 /* yep its him. */
1736                                 *netp = net;
1737                                 SCTP_STAT_INCR(sctps_vtagexpress);
1738                                 *inp_p = stcb->sctp_ep;
1739                                 SCTP_INP_INFO_RUNLOCK();
1740                                 return (stcb);
1741                         } else {
1742                                 /*
1743                                  * not him, this should only happen in rare
1744                                  * cases so I peg it.
1745                                  */
1746                                 SCTP_STAT_INCR(sctps_vtagbogus);
1747                         }
1748                 }
1749                 SCTP_TCB_UNLOCK(stcb);
1750         }
1751         SCTP_INP_INFO_RUNLOCK();
1752         return (NULL);
1753 }
1754
1755 /*
1756  * Find an association with the pointer to the inbound IP packet. This can be
1757  * a IPv4 or IPv6 packet.
1758  */
1759 struct sctp_tcb *
1760 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
1761     struct sctphdr *sh, struct sctp_chunkhdr *ch,
1762     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
1763 {
1764         int find_tcp_pool;
1765         struct ip *iph;
1766         struct sctp_tcb *retval;
1767         struct sockaddr_storage to_store, from_store;
1768         struct sockaddr *to = (struct sockaddr *)&to_store;
1769         struct sockaddr *from = (struct sockaddr *)&from_store;
1770         struct sctp_inpcb *inp;
1771
1772         iph = mtod(m, struct ip *);
1773         if (iph->ip_v == IPVERSION) {
1774                 /* its IPv4 */
1775                 struct sockaddr_in *from4;
1776
1777                 from4 = (struct sockaddr_in *)&from_store;
1778                 bzero(from4, sizeof(*from4));
1779                 from4->sin_family = AF_INET;
1780                 from4->sin_len = sizeof(struct sockaddr_in);
1781                 from4->sin_addr.s_addr = iph->ip_src.s_addr;
1782                 from4->sin_port = sh->src_port;
1783         } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
1784                 /* its IPv6 */
1785                 struct ip6_hdr *ip6;
1786                 struct sockaddr_in6 *from6;
1787
1788                 ip6 = mtod(m, struct ip6_hdr *);
1789                 from6 = (struct sockaddr_in6 *)&from_store;
1790                 bzero(from6, sizeof(*from6));
1791                 from6->sin6_family = AF_INET6;
1792                 from6->sin6_len = sizeof(struct sockaddr_in6);
1793                 from6->sin6_addr = ip6->ip6_src;
1794                 from6->sin6_port = sh->src_port;
1795                 /* Get the scopes in properly to the sin6 addr's */
1796                 /* we probably don't need these operations */
1797                 (void)sa6_recoverscope(from6);
1798                 sa6_embedscope(from6, ip6_use_defzone);
1799         } else {
1800                 /* Currently not supported. */
1801                 return (NULL);
1802         }
1803         if (sh->v_tag) {
1804                 /* we only go down this path if vtag is non-zero */
1805                 retval = sctp_findassoc_by_vtag(from, ntohl(sh->v_tag),
1806                     inp_p, netp, sh->src_port, sh->dest_port, 0);
1807                 if (retval) {
1808                         return (retval);
1809                 }
1810         }
1811         if (iph->ip_v == IPVERSION) {
1812                 /* its IPv4 */
1813                 struct sockaddr_in *to4;
1814
1815                 to4 = (struct sockaddr_in *)&to_store;
1816                 bzero(to4, sizeof(*to4));
1817                 to4->sin_family = AF_INET;
1818                 to4->sin_len = sizeof(struct sockaddr_in);
1819                 to4->sin_addr.s_addr = iph->ip_dst.s_addr;
1820                 to4->sin_port = sh->dest_port;
1821         } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
1822                 /* its IPv6 */
1823                 struct ip6_hdr *ip6;
1824                 struct sockaddr_in6 *to6;
1825
1826                 ip6 = mtod(m, struct ip6_hdr *);
1827                 to6 = (struct sockaddr_in6 *)&to_store;
1828                 bzero(to6, sizeof(*to6));
1829                 to6->sin6_family = AF_INET6;
1830                 to6->sin6_len = sizeof(struct sockaddr_in6);
1831                 to6->sin6_addr = ip6->ip6_dst;
1832                 to6->sin6_port = sh->dest_port;
1833                 /* Get the scopes in properly to the sin6 addr's */
1834                 /* we probably don't need these operations */
1835                 (void)sa6_recoverscope(to6);
1836                 sa6_embedscope(to6, ip6_use_defzone);
1837         }
1838         find_tcp_pool = 0;
1839         if ((ch->chunk_type != SCTP_INITIATION) &&
1840             (ch->chunk_type != SCTP_INITIATION_ACK) &&
1841             (ch->chunk_type != SCTP_COOKIE_ACK) &&
1842             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
1843                 /* Other chunk types go to the tcp pool. */
1844                 find_tcp_pool = 1;
1845         }
1846         if (inp_p) {
1847                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
1848                     find_tcp_pool, vrf_id);
1849                 inp = *inp_p;
1850         } else {
1851                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
1852                     find_tcp_pool, vrf_id);
1853         }
1854         SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp);
1855         if (retval == NULL && inp) {
1856                 /* Found a EP but not this address */
1857                 if ((ch->chunk_type == SCTP_INITIATION) ||
1858                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
1859                         /*-
1860                          * special hook, we do NOT return linp or an
1861                          * association that is linked to an existing
1862                          * association that is under the TCP pool (i.e. no
1863                          * listener exists). The endpoint finding routine
1864                          * will always find a listner before examining the
1865                          * TCP pool.
1866                          */
1867                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
1868                                 if (inp_p) {
1869                                         *inp_p = NULL;
1870                                 }
1871                                 return (NULL);
1872                         }
1873                         retval = sctp_findassociation_special_addr(m, iphlen,
1874                             offset, sh, &inp, netp, to);
1875                         if (inp_p != NULL) {
1876                                 *inp_p = inp;
1877                         }
1878                 }
1879         }
1880         SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval);
1881         return (retval);
1882 }
1883
1884 /*
1885  * lookup an association by an ASCONF lookup address.
1886  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
1887  */
1888 struct sctp_tcb *
1889 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
1890     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp)
1891 {
1892         struct sctp_tcb *stcb;
1893         struct sockaddr_in *sin;
1894         struct sockaddr_in6 *sin6;
1895         struct sockaddr_storage local_store, remote_store;
1896         struct ip *iph;
1897         struct sctp_paramhdr parm_buf, *phdr;
1898         int ptype;
1899         int zero_address = 0;
1900
1901
1902         memset(&local_store, 0, sizeof(local_store));
1903         memset(&remote_store, 0, sizeof(remote_store));
1904
1905         /* First get the destination address setup too. */
1906         iph = mtod(m, struct ip *);
1907         if (iph->ip_v == IPVERSION) {
1908                 /* its IPv4 */
1909                 sin = (struct sockaddr_in *)&local_store;
1910                 sin->sin_family = AF_INET;
1911                 sin->sin_len = sizeof(*sin);
1912                 sin->sin_port = sh->dest_port;
1913                 sin->sin_addr.s_addr = iph->ip_dst.s_addr;
1914         } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
1915                 /* its IPv6 */
1916                 struct ip6_hdr *ip6;
1917
1918                 ip6 = mtod(m, struct ip6_hdr *);
1919                 sin6 = (struct sockaddr_in6 *)&local_store;
1920                 sin6->sin6_family = AF_INET6;
1921                 sin6->sin6_len = sizeof(*sin6);
1922                 sin6->sin6_port = sh->dest_port;
1923                 sin6->sin6_addr = ip6->ip6_dst;
1924         } else {
1925                 return NULL;
1926         }
1927
1928         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
1929             &parm_buf, sizeof(struct sctp_paramhdr));
1930         if (phdr == NULL) {
1931                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
1932                     __FUNCTION__);
1933                 return NULL;
1934         }
1935         ptype = (int)((uint32_t) ntohs(phdr->param_type));
1936         /* get the correlation address */
1937         if (ptype == SCTP_IPV6_ADDRESS) {
1938                 /* ipv6 address param */
1939                 struct sctp_ipv6addr_param *p6, p6_buf;
1940
1941                 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
1942                         return NULL;
1943                 }
1944                 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
1945                     offset + sizeof(struct sctp_asconf_chunk),
1946                     &p6_buf.ph, sizeof(*p6));
1947                 if (p6 == NULL) {
1948                         SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
1949                             __FUNCTION__);
1950                         return (NULL);
1951                 }
1952                 sin6 = (struct sockaddr_in6 *)&remote_store;
1953                 sin6->sin6_family = AF_INET6;
1954                 sin6->sin6_len = sizeof(*sin6);
1955                 sin6->sin6_port = sh->src_port;
1956                 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
1957                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
1958                         zero_address = 1;
1959         } else if (ptype == SCTP_IPV4_ADDRESS) {
1960                 /* ipv4 address param */
1961                 struct sctp_ipv4addr_param *p4, p4_buf;
1962
1963                 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
1964                         return NULL;
1965                 }
1966                 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
1967                     offset + sizeof(struct sctp_asconf_chunk),
1968                     &p4_buf.ph, sizeof(*p4));
1969                 if (p4 == NULL) {
1970                         SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
1971                             __FUNCTION__);
1972                         return (NULL);
1973                 }
1974                 sin = (struct sockaddr_in *)&remote_store;
1975                 sin->sin_family = AF_INET;
1976                 sin->sin_len = sizeof(*sin);
1977                 sin->sin_port = sh->src_port;
1978                 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
1979                 if (sin->sin_addr.s_addr == INADDR_ANY)
1980                         zero_address = 1;
1981         } else {
1982                 /* invalid address param type */
1983                 return NULL;
1984         }
1985
1986         if (zero_address) {
1987                 stcb = sctp_findassoc_by_vtag(NULL, ntohl(sh->v_tag), inp_p,
1988                     netp, sh->src_port, sh->dest_port, 1);
1989                 /*
1990                  * printf("findassociation_ep_asconf: zero lookup address
1991                  * finds stcb 0x%x\n", (uint32_t)stcb);
1992                  */
1993         } else {
1994                 stcb = sctp_findassociation_ep_addr(inp_p,
1995                     (struct sockaddr *)&remote_store, netp,
1996                     (struct sockaddr *)&local_store, NULL);
1997         }
1998         return (stcb);
1999 }
2000
2001
2002 /*
2003  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2004  * addresses. This way if we don't get a bind we by default pick a ephemeral
2005  * port with all addresses bound.
2006  */
2007 int
2008 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2009 {
2010         /*
2011          * we get called when a new endpoint starts up. We need to allocate
2012          * the sctp_inpcb structure from the zone and init it. Mark it as
2013          * unbound and find a port that we can use as an ephemeral with
2014          * INADDR_ANY. If the user binds later no problem we can then add in
2015          * the specific addresses. And setup the default parameters for the
2016          * EP.
2017          */
2018         int i, error;
2019         struct sctp_inpcb *inp;
2020         struct sctp_pcb *m;
2021         struct timeval time;
2022         sctp_sharedkey_t *null_key;
2023
2024         error = 0;
2025
2026         SCTP_INP_INFO_WLOCK();
2027         inp = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_ep, struct sctp_inpcb);
2028         if (inp == NULL) {
2029                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2030                 SCTP_INP_INFO_WUNLOCK();
2031                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2032                 return (ENOBUFS);
2033         }
2034         /* zap it */
2035         bzero(inp, sizeof(*inp));
2036
2037         /* bump generations */
2038         /* setup socket pointers */
2039         inp->sctp_socket = so;
2040         inp->ip_inp.inp.inp_socket = so;
2041
2042         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2043         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2044
2045 #ifdef IPSEC
2046         {
2047                 struct inpcbpolicy *pcb_sp = NULL;
2048
2049                 error = ipsec_init_policy(so, &pcb_sp);
2050                 /* Arrange to share the policy */
2051                 inp->ip_inp.inp.inp_sp = pcb_sp;
2052                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2053         }
2054         if (error != 0) {
2055                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
2056                 SCTP_INP_INFO_WUNLOCK();
2057                 return error;
2058         }
2059 #endif                          /* IPSEC */
2060         SCTP_INCR_EP_COUNT();
2061         inp->ip_inp.inp.inp_ip_ttl = ip_defttl;
2062         SCTP_INP_INFO_WUNLOCK();
2063
2064         so->so_pcb = (caddr_t)inp;
2065
2066         if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) ||
2067             (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) {
2068                 /* UDP style socket */
2069                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2070                     SCTP_PCB_FLAGS_UNBOUND);
2071                 /* Be sure it is NON-BLOCKING IO for UDP */
2072                 /* SCTP_SET_SO_NBIO(so); */
2073         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2074                 /* TCP style socket */
2075                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2076                     SCTP_PCB_FLAGS_UNBOUND);
2077                 /* Be sure we have blocking IO by default */
2078                 SCTP_CLEAR_SO_NBIO(so);
2079         } else {
2080                 /*
2081                  * unsupported socket type (RAW, etc)- in case we missed it
2082                  * in protosw
2083                  */
2084                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2085                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
2086                 return (EOPNOTSUPP);
2087         }
2088         if (sctp_default_frag_interleave == SCTP_FRAG_LEVEL_1) {
2089                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2090                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2091         } else if (sctp_default_frag_interleave == SCTP_FRAG_LEVEL_2) {
2092                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2093                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2094         } else if (sctp_default_frag_interleave == SCTP_FRAG_LEVEL_0) {
2095                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2096                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2097         }
2098         inp->sctp_tcbhash = SCTP_HASH_INIT(sctp_pcbtblsize,
2099             &inp->sctp_hashmark);
2100         if (inp->sctp_tcbhash == NULL) {
2101                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2102                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2103                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
2104                 return (ENOBUFS);
2105         }
2106         inp->def_vrf_id = vrf_id;
2107
2108         SCTP_INP_INFO_WLOCK();
2109         SCTP_INP_LOCK_INIT(inp);
2110         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2111         SCTP_INP_READ_INIT(inp);
2112         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2113         /* lock the new ep */
2114         SCTP_INP_WLOCK(inp);
2115
2116         /* add it to the info area */
2117         LIST_INSERT_HEAD(&sctppcbinfo.listhead, inp, sctp_list);
2118         SCTP_INP_INFO_WUNLOCK();
2119
2120         TAILQ_INIT(&inp->read_queue);
2121         LIST_INIT(&inp->sctp_addr_list);
2122
2123         LIST_INIT(&inp->sctp_asoc_list);
2124
2125 #ifdef SCTP_TRACK_FREED_ASOCS
2126         /* TEMP CODE */
2127         LIST_INIT(&inp->sctp_asoc_free_list);
2128 #endif
2129         /* Init the timer structure for signature change */
2130         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2131         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2132
2133         /* now init the actual endpoint default data */
2134         m = &inp->sctp_ep;
2135
2136         /* setup the base timeout information */
2137         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2138         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2139         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(sctp_delayed_sack_time_default);
2140         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(sctp_heartbeat_interval_default);
2141         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(sctp_pmtu_raise_time_default);
2142         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(sctp_shutdown_guard_time_default);
2143         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(sctp_secret_lifetime_default);
2144         /* all max/min max are in ms */
2145         m->sctp_maxrto = sctp_rto_max_default;
2146         m->sctp_minrto = sctp_rto_min_default;
2147         m->initial_rto = sctp_rto_initial_default;
2148         m->initial_init_rto_max = sctp_init_rto_max_default;
2149         m->sctp_sack_freq = sctp_sack_freq_default;
2150
2151         m->max_open_streams_intome = MAX_SCTP_STREAMS;
2152
2153         m->max_init_times = sctp_init_rtx_max_default;
2154         m->max_send_times = sctp_assoc_rtx_max_default;
2155         m->def_net_failure = sctp_path_rtx_max_default;
2156         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2157         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2158         m->max_burst = sctp_max_burst_default;
2159         if ((sctp_default_cc_module >= SCTP_CC_RFC2581) &&
2160             (sctp_default_cc_module <= SCTP_CC_HTCP)) {
2161                 m->sctp_default_cc_module = sctp_default_cc_module;
2162         } else {
2163                 /* sysctl done with invalid value, set to 2581 */
2164                 m->sctp_default_cc_module = SCTP_CC_RFC2581;
2165         }
2166         /* number of streams to pre-open on a association */
2167         m->pre_open_stream_count = sctp_nr_outgoing_streams_default;
2168
2169         /* Add adaptation cookie */
2170         m->adaptation_layer_indicator = 0x504C5253;
2171
2172         /* seed random number generator */
2173         m->random_counter = 1;
2174         m->store_at = SCTP_SIGNATURE_SIZE;
2175         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2176         sctp_fill_random_store(m);
2177
2178         /* Minimum cookie size */
2179         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2180             sizeof(struct sctp_state_cookie);
2181         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2182
2183         /* Setup the initial secret */
2184         (void)SCTP_GETTIME_TIMEVAL(&time);
2185         m->time_of_secret_change = time.tv_sec;
2186
2187         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2188                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2189         }
2190         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2191
2192         /* How long is a cookie good for ? */
2193         m->def_cookie_life = MSEC_TO_TICKS(sctp_valid_cookie_life_default);
2194         /*
2195          * Initialize authentication parameters
2196          */
2197         m->local_hmacs = sctp_default_supported_hmaclist();
2198         m->local_auth_chunks = sctp_alloc_chunklist();
2199         sctp_auth_set_default_chunks(m->local_auth_chunks);
2200         LIST_INIT(&m->shared_keys);
2201         /* add default NULL key as key id 0 */
2202         null_key = sctp_alloc_sharedkey();
2203         sctp_insert_sharedkey(&m->shared_keys, null_key);
2204         SCTP_INP_WUNLOCK(inp);
2205 #ifdef SCTP_LOG_CLOSING
2206         sctp_log_closing(inp, NULL, 12);
2207 #endif
2208         return (error);
2209 }
2210
2211
2212 void
2213 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2214     struct sctp_tcb *stcb)
2215 {
2216         struct sctp_nets *net;
2217         uint16_t lport, rport;
2218         struct sctppcbhead *head;
2219         struct sctp_laddr *laddr, *oladdr;
2220
2221         atomic_add_int(&stcb->asoc.refcnt, 1);
2222         SCTP_TCB_UNLOCK(stcb);
2223         SCTP_INP_INFO_WLOCK();
2224         SCTP_INP_WLOCK(old_inp);
2225         SCTP_INP_WLOCK(new_inp);
2226         SCTP_TCB_LOCK(stcb);
2227         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2228
2229         new_inp->sctp_ep.time_of_secret_change =
2230             old_inp->sctp_ep.time_of_secret_change;
2231         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2232             sizeof(old_inp->sctp_ep.secret_key));
2233         new_inp->sctp_ep.current_secret_number =
2234             old_inp->sctp_ep.current_secret_number;
2235         new_inp->sctp_ep.last_secret_number =
2236             old_inp->sctp_ep.last_secret_number;
2237         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2238
2239         /* make it so new data pours into the new socket */
2240         stcb->sctp_socket = new_inp->sctp_socket;
2241         stcb->sctp_ep = new_inp;
2242
2243         /* Copy the port across */
2244         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2245         rport = stcb->rport;
2246         /* Pull the tcb from the old association */
2247         LIST_REMOVE(stcb, sctp_tcbhash);
2248         LIST_REMOVE(stcb, sctp_tcblist);
2249
2250         /* Now insert the new_inp into the TCP connected hash */
2251         head = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR((lport + rport),
2252             sctppcbinfo.hashtcpmark)];
2253
2254         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2255         /* Its safe to access */
2256         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2257
2258         /* Now move the tcb into the endpoint list */
2259         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2260         /*
2261          * Question, do we even need to worry about the ep-hash since we
2262          * only have one connection? Probably not :> so lets get rid of it
2263          * and not suck up any kernel memory in that.
2264          */
2265
2266         /* Ok. Let's restart timer. */
2267         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2268                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2269                     stcb, net);
2270         }
2271
2272         SCTP_INP_INFO_WUNLOCK();
2273         if (new_inp->sctp_tcbhash != NULL) {
2274                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2275                 new_inp->sctp_tcbhash = NULL;
2276         }
2277         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2278                 /* Subset bound, so copy in the laddr list from the old_inp */
2279                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2280                         laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
2281                         if (laddr == NULL) {
2282                                 /*
2283                                  * Gak, what can we do? This assoc is really
2284                                  * HOSED. We probably should send an abort
2285                                  * here.
2286                                  */
2287                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2288                                 continue;
2289                         }
2290                         SCTP_INCR_LADDR_COUNT();
2291                         bzero(laddr, sizeof(*laddr));
2292                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2293                         laddr->ifa = oladdr->ifa;
2294                         atomic_add_int(&laddr->ifa->refcount, 1);
2295                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2296                             sctp_nxt_addr);
2297                         new_inp->laddr_count++;
2298                 }
2299         }
2300         /*
2301          * Now any running timers need to be adjusted since we really don't
2302          * care if they are running or not just blast in the new_inp into
2303          * all of them.
2304          */
2305
2306         stcb->asoc.hb_timer.ep = (void *)new_inp;
2307         stcb->asoc.dack_timer.ep = (void *)new_inp;
2308         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2309         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2310         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2311         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2312         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2313         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2314         /* now what about the nets? */
2315         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2316                 net->pmtu_timer.ep = (void *)new_inp;
2317                 net->rxt_timer.ep = (void *)new_inp;
2318                 net->fr_timer.ep = (void *)new_inp;
2319         }
2320         SCTP_INP_WUNLOCK(new_inp);
2321         SCTP_INP_WUNLOCK(old_inp);
2322 }
2323
2324 static int
2325 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
2326 {
2327         struct sctppcbhead *head;
2328         struct sctp_inpcb *t_inp;
2329         int fnd;
2330
2331         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
2332             sctppcbinfo.hashmark)];
2333         LIST_FOREACH(t_inp, head, sctp_hash) {
2334                 if (t_inp->sctp_lport != lport) {
2335                         continue;
2336                 }
2337                 /* is it in the VRF in question */
2338                 fnd = 0;
2339                 if (t_inp->def_vrf_id == vrf_id)
2340                         fnd = 1;
2341                 if (!fnd)
2342                         continue;
2343
2344                 /* This one is in use. */
2345                 /* check the v6/v4 binding issue */
2346                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2347                     SCTP_IPV6_V6ONLY(t_inp)) {
2348                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2349                                 /* collision in V6 space */
2350                                 return (1);
2351                         } else {
2352                                 /* inp is BOUND_V4 no conflict */
2353                                 continue;
2354                         }
2355                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2356                         /* t_inp is bound v4 and v6, conflict always */
2357                         return (1);
2358                 } else {
2359                         /* t_inp is bound only V4 */
2360                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2361                             SCTP_IPV6_V6ONLY(inp)) {
2362                                 /* no conflict */
2363                                 continue;
2364                         }
2365                         /* else fall through to conflict */
2366                 }
2367                 return (1);
2368         }
2369         return (0);
2370 }
2371
2372
2373
2374 /* sctp_ifap is used to bypass normal local address validation checks */
2375 int
2376 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2377     struct sctp_ifa *sctp_ifap, struct thread *p)
2378 {
2379         /* bind a ep to a socket address */
2380         struct sctppcbhead *head;
2381         struct sctp_inpcb *inp, *inp_tmp;
2382         struct inpcb *ip_inp;
2383         int bindall;
2384         int prison = 0;
2385         uint16_t lport;
2386         int error;
2387         uint32_t vrf_id;
2388
2389         lport = 0;
2390         error = 0;
2391         bindall = 1;
2392         inp = (struct sctp_inpcb *)so->so_pcb;
2393         ip_inp = (struct inpcb *)so->so_pcb;
2394 #ifdef SCTP_DEBUG
2395         if (addr) {
2396                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
2397                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2398                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
2399                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2400         }
2401 #endif
2402         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2403                 /* already did a bind, subsequent binds NOT allowed ! */
2404                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2405                 return (EINVAL);
2406         }
2407 #ifdef INVARIANTS
2408         if (p == NULL)
2409                 panic("null proc/thread");
2410 #endif
2411         if (p && jailed(p->td_ucred)) {
2412                 prison = 1;
2413         }
2414         if (addr != NULL) {
2415                 if (addr->sa_family == AF_INET) {
2416                         struct sockaddr_in *sin;
2417
2418                         /* IPV6_V6ONLY socket? */
2419                         if (SCTP_IPV6_V6ONLY(ip_inp)) {
2420                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2421                                 return (EINVAL);
2422                         }
2423                         if (addr->sa_len != sizeof(*sin)) {
2424                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2425                                 return (EINVAL);
2426                         }
2427                         sin = (struct sockaddr_in *)addr;
2428                         lport = sin->sin_port;
2429                         if (prison) {
2430                                 /*
2431                                  * For INADDR_ANY and  LOOPBACK the
2432                                  * prison_ip() call will tranmute the ip
2433                                  * address to the proper valie.
2434                                  */
2435                                 if (prison_ip(p->td_ucred, 0, &sin->sin_addr.s_addr)) {
2436                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2437                                         return (EINVAL);
2438                                 }
2439                         }
2440                         if (sin->sin_addr.s_addr != INADDR_ANY) {
2441                                 bindall = 0;
2442                         }
2443                 } else if (addr->sa_family == AF_INET6) {
2444                         /* Only for pure IPv6 Address. (No IPv4 Mapped!) */
2445                         struct sockaddr_in6 *sin6;
2446
2447                         sin6 = (struct sockaddr_in6 *)addr;
2448
2449                         if (addr->sa_len != sizeof(*sin6)) {
2450                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2451                                 return (EINVAL);
2452                         }
2453                         lport = sin6->sin6_port;
2454                         /*
2455                          * Jail checks for IPv6 should go HERE! i.e. add the
2456                          * prison_ip() equivilant in this postion to
2457                          * transmute the addresses to the proper one jailed.
2458                          */
2459                         if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2460                                 bindall = 0;
2461                                 /* KAME hack: embed scopeid */
2462                                 if (sa6_embedscope(sin6, ip6_use_defzone) != 0) {
2463                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2464                                         return (EINVAL);
2465                                 }
2466                         }
2467                         /* this must be cleared for ifa_ifwithaddr() */
2468                         sin6->sin6_scope_id = 0;
2469                 } else {
2470                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2471                         return (EAFNOSUPPORT);
2472                 }
2473         }
2474         /* Setup a vrf_id to be the default for the non-bind-all case. */
2475         vrf_id = inp->def_vrf_id;
2476
2477         SCTP_INP_INFO_WLOCK();
2478         SCTP_INP_WLOCK(inp);
2479         /* increase our count due to the unlock we do */
2480         SCTP_INP_INCR_REF(inp);
2481         if (lport) {
2482                 /*
2483                  * Did the caller specify a port? if so we must see if a ep
2484                  * already has this one bound.
2485                  */
2486                 /* got to be root to get at low ports */
2487                 if (ntohs(lport) < IPPORT_RESERVED) {
2488                         if (p && (error =
2489                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2490                             )) {
2491                                 SCTP_INP_DECR_REF(inp);
2492                                 SCTP_INP_WUNLOCK(inp);
2493                                 SCTP_INP_INFO_WUNLOCK();
2494                                 return (error);
2495                         }
2496                 }
2497                 if (p == NULL) {
2498                         SCTP_INP_DECR_REF(inp);
2499                         SCTP_INP_WUNLOCK(inp);
2500                         SCTP_INP_INFO_WUNLOCK();
2501                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2502                         return (error);
2503                 }
2504                 SCTP_INP_WUNLOCK(inp);
2505                 if (bindall) {
2506                         vrf_id = inp->def_vrf_id;
2507                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2508                         if (inp_tmp != NULL) {
2509                                 /*
2510                                  * lock guy returned and lower count note
2511                                  * that we are not bound so inp_tmp should
2512                                  * NEVER be inp. And it is this inp
2513                                  * (inp_tmp) that gets the reference bump,
2514                                  * so we must lower it.
2515                                  */
2516                                 SCTP_INP_DECR_REF(inp_tmp);
2517                                 SCTP_INP_DECR_REF(inp);
2518                                 /* unlock info */
2519                                 SCTP_INP_INFO_WUNLOCK();
2520                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2521                                 return (EADDRINUSE);
2522                         }
2523                 } else {
2524                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2525                         if (inp_tmp != NULL) {
2526                                 /*
2527                                  * lock guy returned and lower count note
2528                                  * that we are not bound so inp_tmp should
2529                                  * NEVER be inp. And it is this inp
2530                                  * (inp_tmp) that gets the reference bump,
2531                                  * so we must lower it.
2532                                  */
2533                                 SCTP_INP_DECR_REF(inp_tmp);
2534                                 SCTP_INP_DECR_REF(inp);
2535                                 /* unlock info */
2536                                 SCTP_INP_INFO_WUNLOCK();
2537                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2538                                 return (EADDRINUSE);
2539                         }
2540                 }
2541                 SCTP_INP_WLOCK(inp);
2542                 if (bindall) {
2543                         /* verify that no lport is not used by a singleton */
2544                         if (sctp_isport_inuse(inp, lport, vrf_id)) {
2545                                 /* Sorry someone already has this one bound */
2546                                 SCTP_INP_DECR_REF(inp);
2547                                 SCTP_INP_WUNLOCK(inp);
2548                                 SCTP_INP_INFO_WUNLOCK();
2549                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2550                                 return (EADDRINUSE);
2551                         }
2552                 }
2553         } else {
2554                 uint16_t first, last, candidate;
2555                 uint16_t count;
2556                 int done;
2557
2558                 if (ip_inp->inp_flags & INP_HIGHPORT) {
2559                         first = ipport_hifirstauto;
2560                         last = ipport_hilastauto;
2561                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2562                         if (p && (error =
2563                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2564                             )) {
2565                                 SCTP_INP_DECR_REF(inp);
2566                                 SCTP_INP_WUNLOCK(inp);
2567                                 SCTP_INP_INFO_WUNLOCK();
2568                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2569                                 return (error);
2570                         }
2571                         first = ipport_lowfirstauto;
2572                         last = ipport_lowlastauto;
2573                 } else {
2574                         first = ipport_firstauto;
2575                         last = ipport_lastauto;
2576                 }
2577                 if (first > last) {
2578                         uint16_t temp;
2579
2580                         temp = first;
2581                         first = last;
2582                         last = temp;
2583                 }
2584                 count = last - first + 1;       /* number of candidates */
2585                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2586
2587                 done = 0;
2588                 while (!done) {
2589                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == 0) {
2590                                 done = 1;
2591                         }
2592                         if (!done) {
2593                                 if (--count == 0) {
2594                                         SCTP_INP_DECR_REF(inp);
2595                                         SCTP_INP_WUNLOCK(inp);
2596                                         SCTP_INP_INFO_WUNLOCK();
2597                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2598                                         return (EADDRINUSE);
2599                                 }
2600                                 if (candidate == last)
2601                                         candidate = first;
2602                                 else
2603                                         candidate = candidate + 1;
2604                         }
2605                 }
2606                 lport = htons(candidate);
2607         }
2608         SCTP_INP_DECR_REF(inp);
2609         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2610             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2611                 /*
2612                  * this really should not happen. The guy did a non-blocking
2613                  * bind and then did a close at the same time.
2614                  */
2615                 SCTP_INP_WUNLOCK(inp);
2616                 SCTP_INP_INFO_WUNLOCK();
2617                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2618                 return (EINVAL);
2619         }
2620         /* ok we look clear to give out this port, so lets setup the binding */
2621         if (bindall) {
2622                 /* binding to all addresses, so just set in the proper flags */
2623                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
2624                 /* set the automatic addr changes from kernel flag */
2625                 if (sctp_auto_asconf == 0) {
2626                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2627                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2628                 } else {
2629                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2630                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2631                 }
2632                 /*
2633                  * set the automatic mobility_base from kernel flag (by
2634                  * micchie)
2635                  */
2636                 if (sctp_mobility_base == 0) {
2637                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
2638                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2639                 } else {
2640                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
2641                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2642                 }
2643                 /*
2644                  * set the automatic mobility_fasthandoff from kernel flag
2645                  * (by micchie)
2646                  */
2647                 if (sctp_mobility_fasthandoff == 0) {
2648                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
2649                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2650                 } else {
2651                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
2652                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2653                 }
2654         } else {
2655                 /*
2656                  * bind specific, make sure flags is off and add a new
2657                  * address structure to the sctp_addr_list inside the ep
2658                  * structure.
2659                  *
2660                  * We will need to allocate one and insert it at the head. The
2661                  * socketopt call can just insert new addresses in there as
2662                  * well. It will also have to do the embed scope kame hack
2663                  * too (before adding).
2664                  */
2665                 struct sctp_ifa *ifa;
2666                 struct sockaddr_storage store_sa;
2667
2668                 memset(&store_sa, 0, sizeof(store_sa));
2669                 if (addr->sa_family == AF_INET) {
2670                         struct sockaddr_in *sin;
2671
2672                         sin = (struct sockaddr_in *)&store_sa;
2673                         memcpy(sin, addr, sizeof(struct sockaddr_in));
2674                         sin->sin_port = 0;
2675                 } else if (addr->sa_family == AF_INET6) {
2676                         struct sockaddr_in6 *sin6;
2677
2678                         sin6 = (struct sockaddr_in6 *)&store_sa;
2679                         memcpy(sin6, addr, sizeof(struct sockaddr_in6));
2680                         sin6->sin6_port = 0;
2681                 }
2682                 /*
2683                  * first find the interface with the bound address need to
2684                  * zero out the port to find the address! yuck! can't do
2685                  * this earlier since need port for sctp_pcb_findep()
2686                  */
2687                 if (sctp_ifap != NULL)
2688                         ifa = sctp_ifap;
2689                 else {
2690                         /*
2691                          * Note for BSD we hit here always other O/S's will
2692                          * pass things in via the sctp_ifap argument
2693                          * (Panda).
2694                          */
2695                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
2696                             vrf_id, SCTP_ADDR_NOT_LOCKED);
2697                 }
2698                 if (ifa == NULL) {
2699                         /* Can't find an interface with that address */
2700                         SCTP_INP_WUNLOCK(inp);
2701                         SCTP_INP_INFO_WUNLOCK();
2702                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
2703                         return (EADDRNOTAVAIL);
2704                 }
2705                 if (addr->sa_family == AF_INET6) {
2706                         /* GAK, more FIXME IFA lock? */
2707                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2708                                 /* Can't bind a non-existent addr. */
2709                                 SCTP_INP_WUNLOCK(inp);
2710                                 SCTP_INP_INFO_WUNLOCK();
2711                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2712                                 return (EINVAL);
2713                         }
2714                 }
2715                 /* we're not bound all */
2716                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
2717                 /* allow bindx() to send ASCONF's for binding changes */
2718                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2719                 /* clear automatic addr changes from kernel flag */
2720                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2721
2722                 /* add this address to the endpoint list */
2723                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
2724                 if (error != 0) {
2725                         SCTP_INP_WUNLOCK(inp);
2726                         SCTP_INP_INFO_WUNLOCK();
2727                         return (error);
2728                 }
2729                 inp->laddr_count++;
2730         }
2731         /* find the bucket */
2732         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
2733             sctppcbinfo.hashmark)];
2734         /* put it in the bucket */
2735         LIST_INSERT_HEAD(head, inp, sctp_hash);
2736         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d\n",
2737             head, ntohs(lport));
2738         /* set in the port */
2739         inp->sctp_lport = lport;
2740
2741         /* turn off just the unbound flag */
2742         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2743         SCTP_INP_WUNLOCK(inp);
2744         SCTP_INP_INFO_WUNLOCK();
2745         return (0);
2746 }
2747
2748
2749 static void
2750 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next)
2751 {
2752         struct sctp_iterator *it;
2753
2754         /*
2755          * We enter with the only the ITERATOR_LOCK in place and a write
2756          * lock on the inp_info stuff.
2757          */
2758
2759         /*
2760          * Go through all iterators, we must do this since it is possible
2761          * that some iterator does NOT have the lock, but is waiting for it.
2762          * And the one that had the lock has either moved in the last
2763          * iteration or we just cleared it above. We need to find all of
2764          * those guys. The list of iterators should never be very big
2765          * though.
2766          */
2767         TAILQ_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) {
2768                 if (it == inp->inp_starting_point_for_iterator)
2769                         /* skip this guy, he's special */
2770                         continue;
2771                 if (it->inp == inp) {
2772                         /*
2773                          * This is tricky and we DON'T lock the iterator.
2774                          * Reason is he's running but waiting for me since
2775                          * inp->inp_starting_point_for_iterator has the lock
2776                          * on me (the guy above we skipped). This tells us
2777                          * its is not running but waiting for
2778                          * inp->inp_starting_point_for_iterator to be
2779                          * released by the guy that does have our INP in a
2780                          * lock.
2781                          */
2782                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2783                                 it->inp = NULL;
2784                                 it->stcb = NULL;
2785                         } else {
2786                                 /* set him up to do the next guy not me */
2787                                 it->inp = inp_next;
2788                                 it->stcb = NULL;
2789                         }
2790                 }
2791         }
2792         it = inp->inp_starting_point_for_iterator;
2793         if (it) {
2794                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2795                         it->inp = NULL;
2796                 } else {
2797                         it->inp = inp_next;
2798                 }
2799                 it->stcb = NULL;
2800         }
2801 }
2802
2803 /* release sctp_inpcb unbind the port */
2804 void
2805 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
2806 {
2807         /*
2808          * Here we free a endpoint. We must find it (if it is in the Hash
2809          * table) and remove it from there. Then we must also find it in the
2810          * overall list and remove it from there. After all removals are
2811          * complete then any timer has to be stopped. Then start the actual
2812          * freeing. a) Any local lists. b) Any associations. c) The hash of
2813          * all associations. d) finally the ep itself.
2814          */
2815         struct sctp_pcb *m;
2816         struct sctp_inpcb *inp_save;
2817         struct sctp_tcb *asoc, *nasoc;
2818         struct sctp_laddr *laddr, *nladdr;
2819         struct inpcb *ip_pcb;
2820         struct socket *so;
2821
2822         struct sctp_queued_to_read *sq;
2823
2824
2825         int cnt;
2826         sctp_sharedkey_t *shared_key;
2827
2828
2829 #ifdef SCTP_LOG_CLOSING
2830         sctp_log_closing(inp, NULL, 0);
2831 #endif
2832         SCTP_ITERATOR_LOCK();
2833         so = inp->sctp_socket;
2834         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2835                 /* been here before.. eeks.. get out of here */
2836                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
2837                 SCTP_ITERATOR_UNLOCK();
2838 #ifdef SCTP_LOG_CLOSING
2839                 sctp_log_closing(inp, NULL, 1);
2840 #endif
2841                 return;
2842         }
2843         SCTP_ASOC_CREATE_LOCK(inp);
2844         SCTP_INP_INFO_WLOCK();
2845
2846         SCTP_INP_WLOCK(inp);
2847         /* First time through we have the socket lock, after that no more. */
2848         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
2849                 /*
2850                  * Once we are in we can remove the flag from = 1 is only
2851                  * passed from the actual closing routines that are called
2852                  * via the sockets layer.
2853                  */
2854                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
2855                 /* socket is gone, so no more wakeups allowed */
2856                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
2857                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
2858                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
2859         }
2860         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
2861             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
2862
2863         if (inp->control) {
2864                 sctp_m_freem(inp->control);
2865                 inp->control = NULL;
2866         }
2867         if (inp->pkt) {
2868                 sctp_m_freem(inp->pkt);
2869                 inp->pkt = NULL;
2870         }
2871         m = &inp->sctp_ep;
2872         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
2873                                          * here but I will be nice :> (i.e.
2874                                          * ip_pcb = ep;) */
2875         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
2876                 int cnt_in_sd;
2877
2878                 cnt_in_sd = 0;
2879                 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2880                     asoc = nasoc) {
2881                         SCTP_TCB_LOCK(asoc);
2882                         nasoc = LIST_NEXT(asoc, sctp_tcblist);
2883                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2884                                 /* Skip guys being freed */
2885                                 /* asoc->sctp_socket = NULL; FIXME MT */
2886                                 cnt_in_sd++;
2887                                 SCTP_TCB_UNLOCK(asoc);
2888                                 continue;
2889                         }
2890                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
2891                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
2892                                 /*
2893                                  * If we have data in queue, we don't want
2894                                  * to just free since the app may have done,
2895                                  * send()/close or connect/send/close. And
2896                                  * it wants the data to get across first.
2897                                  */
2898                                 /* Just abandon things in the front states */
2899                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
2900                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
2901                                         cnt_in_sd++;
2902                                 }
2903                                 continue;
2904                         }
2905                         /* Disconnect the socket please */
2906                         asoc->sctp_socket = NULL;
2907                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
2908                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
2909                             (asoc->asoc.control_pdapi) ||
2910                             (asoc->asoc.size_on_all_streams > 0) ||
2911                             (so && (so->so_rcv.sb_cc > 0))
2912                             ) {
2913                                 /* Left with Data unread */
2914                                 struct mbuf *op_err;
2915
2916                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
2917                                     0, M_DONTWAIT, 1, MT_DATA);
2918                                 if (op_err) {
2919                                         /* Fill in the user initiated abort */
2920                                         struct sctp_paramhdr *ph;
2921                                         uint32_t *ippp;
2922
2923                                         SCTP_BUF_LEN(op_err) =
2924                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
2925                                         ph = mtod(op_err,
2926                                             struct sctp_paramhdr *);
2927                                         ph->param_type = htons(
2928                                             SCTP_CAUSE_USER_INITIATED_ABT);
2929                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
2930                                         ippp = (uint32_t *) (ph + 1);
2931                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
2932                                 }
2933                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
2934 #if defined(SCTP_PANIC_ON_ABORT)
2935                                 panic("inpcb_free does an abort");
2936 #endif
2937                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
2938                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
2939                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2940                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2941                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2942                                 }
2943                                 if (sctp_free_assoc(inp, asoc,
2944                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
2945                                         cnt_in_sd++;
2946                                 }
2947                                 continue;
2948                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2949                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
2950                                     (asoc->asoc.stream_queue_cnt == 0)
2951                             ) {
2952                                 if (asoc->asoc.locked_on_sending) {
2953                                         goto abort_anyway;
2954                                 }
2955                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
2956                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
2957                                         /*
2958                                          * there is nothing queued to send,
2959                                          * so I send shutdown
2960                                          */
2961                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
2962                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2963                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2964                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2965                                         }
2966                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
2967                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
2968                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
2969                                             asoc->asoc.primary_destination);
2970                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2971                                             asoc->asoc.primary_destination);
2972                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
2973                                 }
2974                         } else {
2975                                 /* mark into shutdown pending */
2976                                 struct sctp_stream_queue_pending *sp;
2977
2978                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
2979                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2980                                     asoc->asoc.primary_destination);
2981                                 if (asoc->asoc.locked_on_sending) {
2982                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
2983                                             sctp_streamhead);
2984                                         if (sp == NULL) {
2985                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
2986                                                     asoc->asoc.locked_on_sending,
2987                                                     asoc->asoc.locked_on_sending->stream_no);
2988                                         } else {
2989                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
2990                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
2991                                         }
2992                                 }
2993                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2994                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
2995                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
2996                                         struct mbuf *op_err;
2997
2998                         abort_anyway:
2999                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3000                                             0, M_DONTWAIT, 1, MT_DATA);
3001                                         if (op_err) {
3002                                                 /*
3003                                                  * Fill in the user
3004                                                  * initiated abort
3005                                                  */
3006                                                 struct sctp_paramhdr *ph;
3007                                                 uint32_t *ippp;
3008
3009                                                 SCTP_BUF_LEN(op_err) =
3010                                                     (sizeof(struct sctp_paramhdr) +
3011                                                     sizeof(uint32_t));
3012                                                 ph = mtod(op_err,
3013                                                     struct sctp_paramhdr *);
3014                                                 ph->param_type = htons(
3015                                                     SCTP_CAUSE_USER_INITIATED_ABT);
3016                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3017                                                 ippp = (uint32_t *) (ph + 1);
3018                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
3019                                         }
3020                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3021 #if defined(SCTP_PANIC_ON_ABORT)
3022                                         panic("inpcb_free does an abort");
3023 #endif
3024
3025                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3026                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3027                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3028                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3029                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3030                                         }
3031                                         if (sctp_free_assoc(inp, asoc,
3032                                             SCTP_PCBFREE_NOFORCE,
3033                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3034                                                 cnt_in_sd++;
3035                                         }
3036                                         continue;
3037                                 } else {
3038                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3039                                 }
3040                         }
3041                         cnt_in_sd++;
3042                         SCTP_TCB_UNLOCK(asoc);
3043                 }
3044                 /* now is there some left in our SHUTDOWN state? */
3045                 if (cnt_in_sd) {
3046                         SCTP_INP_WUNLOCK(inp);
3047                         SCTP_ASOC_CREATE_UNLOCK(inp);
3048                         SCTP_INP_INFO_WUNLOCK();
3049                         SCTP_ITERATOR_UNLOCK();
3050 #ifdef SCTP_LOG_CLOSING
3051                         sctp_log_closing(inp, NULL, 2);
3052 #endif
3053                         return;
3054                 }
3055         }
3056         inp->sctp_socket = NULL;
3057         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3058             SCTP_PCB_FLAGS_UNBOUND) {
3059                 /*
3060                  * ok, this guy has been bound. It's port is somewhere in
3061                  * the sctppcbinfo hash table. Remove it!
3062                  */
3063                 LIST_REMOVE(inp, sctp_hash);
3064                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3065         }
3066         /*
3067          * If there is a timer running to kill us, forget it, since it may
3068          * have a contest on the INP lock.. which would cause us to die ...
3069          */
3070         cnt = 0;
3071         for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
3072             asoc = nasoc) {
3073                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
3074                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3075                         cnt++;
3076                         continue;
3077                 }
3078                 /* Free associations that are NOT killing us */
3079                 SCTP_TCB_LOCK(asoc);
3080                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3081                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3082                         struct mbuf *op_err;
3083                         uint32_t *ippp;
3084
3085                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3086                             0, M_DONTWAIT, 1, MT_DATA);
3087                         if (op_err) {
3088                                 /* Fill in the user initiated abort */
3089                                 struct sctp_paramhdr *ph;
3090
3091                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
3092                                     sizeof(uint32_t));
3093                                 ph = mtod(op_err, struct sctp_paramhdr *);
3094                                 ph->param_type = htons(
3095                                     SCTP_CAUSE_USER_INITIATED_ABT);
3096                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3097                                 ippp = (uint32_t *) (ph + 1);
3098                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
3099
3100                         }
3101                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3102 #if defined(SCTP_PANIC_ON_ABORT)
3103                         panic("inpcb_free does an abort");
3104 #endif
3105                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3106                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3107                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3108                         cnt++;
3109                         SCTP_TCB_UNLOCK(asoc);
3110                         continue;
3111                 }
3112                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3113                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3114                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3115                 }
3116                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3117                         cnt++;
3118                 }
3119         }
3120         if (cnt) {
3121                 /* Ok we have someone out there that will kill us */
3122                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3123                 SCTP_INP_WUNLOCK(inp);
3124                 SCTP_ASOC_CREATE_UNLOCK(inp);
3125                 SCTP_INP_INFO_WUNLOCK();
3126                 SCTP_ITERATOR_UNLOCK();
3127 #ifdef SCTP_LOG_CLOSING
3128                 sctp_log_closing(inp, NULL, 3);
3129 #endif
3130                 return;
3131         }
3132         if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3133                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3134                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3135                 SCTP_INP_WUNLOCK(inp);
3136                 SCTP_ASOC_CREATE_UNLOCK(inp);
3137                 SCTP_INP_INFO_WUNLOCK();
3138                 SCTP_ITERATOR_UNLOCK();
3139 #ifdef SCTP_LOG_CLOSING
3140                 sctp_log_closing(inp, NULL, 4);
3141 #endif
3142                 return;
3143         }
3144         (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3145         inp->sctp_ep.signature_change.type = 0;
3146         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3147
3148 #ifdef SCTP_LOG_CLOSING
3149         sctp_log_closing(inp, NULL, 5);
3150 #endif
3151
3152         (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3153         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE;
3154         /* Clear the read queue */
3155         /* sa_ignore FREED_MEMORY */
3156         while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) {
3157                 /* Its only abandoned if it had data left */
3158                 if (sq->length)
3159                         SCTP_STAT_INCR(sctps_left_abandon);
3160
3161                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3162                 sctp_free_remote_addr(sq->whoFrom);
3163                 if (so)
3164                         so->so_rcv.sb_cc -= sq->length;
3165                 if (sq->data) {
3166                         sctp_m_freem(sq->data);
3167                         sq->data = NULL;
3168                 }
3169                 /*
3170                  * no need to free the net count, since at this point all
3171                  * assoc's are gone.
3172                  */
3173                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq);
3174                 SCTP_DECR_READQ_COUNT();
3175         }
3176         /* Now the sctp_pcb things */
3177         /*
3178          * free each asoc if it is not already closed/free. we can't use the
3179          * macro here since le_next will get freed as part of the
3180          * sctp_free_assoc() call.
3181          */
3182         cnt = 0;
3183         if (so) {
3184 #ifdef IPSEC
3185                 ipsec4_delete_pcbpolicy(ip_pcb);
3186 #endif                          /* IPSEC */
3187
3188                 /* Unlocks not needed since the socket is gone now */
3189         }
3190         if (ip_pcb->inp_options) {
3191                 (void)sctp_m_free(ip_pcb->inp_options);
3192                 ip_pcb->inp_options = 0;
3193         }
3194         if (ip_pcb->inp_moptions) {
3195                 inp_freemoptions(ip_pcb->inp_moptions);
3196                 ip_pcb->inp_moptions = 0;
3197         }
3198 #ifdef INET6
3199         if (ip_pcb->inp_vflag & INP_IPV6) {
3200                 struct in6pcb *in6p;
3201
3202                 in6p = (struct in6pcb *)inp;
3203                 ip6_freepcbopts(in6p->in6p_outputopts);
3204         }
3205 #endif                          /* INET6 */
3206         ip_pcb->inp_vflag = 0;
3207         /* free up authentication fields */
3208         if (inp->sctp_ep.local_auth_chunks != NULL)
3209                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3210         if (inp->sctp_ep.local_hmacs != NULL)
3211                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3212
3213         shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
3214         while (shared_key) {
3215                 LIST_REMOVE(shared_key, next);
3216                 sctp_free_sharedkey(shared_key);
3217                 /* sa_ignore FREED_MEMORY */
3218                 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
3219         }
3220
3221         inp_save = LIST_NEXT(inp, sctp_list);
3222         LIST_REMOVE(inp, sctp_list);
3223
3224         /* fix any iterators only after out of the list */
3225         sctp_iterator_inp_being_freed(inp, inp_save);
3226         /*
3227          * if we have an address list the following will free the list of
3228          * ifaddr's that are set into this ep. Again macro limitations here,
3229          * since the LIST_FOREACH could be a bad idea.
3230          */
3231         for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
3232             laddr = nladdr) {
3233                 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
3234                 sctp_remove_laddr(laddr);
3235         }
3236
3237 #ifdef SCTP_TRACK_FREED_ASOCS
3238         /* TEMP CODE */
3239         for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL;
3240             asoc = nasoc) {
3241                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
3242                 LIST_REMOVE(asoc, sctp_tcblist);
3243                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, asoc);
3244                 SCTP_DECR_ASOC_COUNT();
3245         }
3246         /* *** END TEMP CODE *** */
3247 #endif
3248         /* Now lets see about freeing the EP hash table. */
3249         if (inp->sctp_tcbhash != NULL) {
3250                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3251                 inp->sctp_tcbhash = NULL;
3252         }
3253         /* Now we must put the ep memory back into the zone pool */
3254         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3255         SCTP_INP_LOCK_DESTROY(inp);
3256         SCTP_INP_READ_DESTROY(inp);
3257         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3258         SCTP_INP_INFO_WUNLOCK();
3259         SCTP_ITERATOR_UNLOCK();
3260         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
3261         SCTP_DECR_EP_COUNT();
3262 }
3263
3264
3265 struct sctp_nets *
3266 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3267 {
3268         struct sctp_nets *net;
3269
3270         /* locate the address */
3271         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3272                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3273                         return (net);
3274         }
3275         return (NULL);
3276 }
3277
3278
3279 int
3280 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3281 {
3282         struct sctp_ifa *sctp_ifa;
3283
3284         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3285         if (sctp_ifa) {
3286                 return (1);
3287         } else {
3288                 return (0);
3289         }
3290 }
3291
3292 /*
3293  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3294  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3295  * stats of stuff.
3296  */
3297 int
3298 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3299     int set_scope, int from)
3300 {
3301         /*
3302          * The following is redundant to the same lines in the
3303          * sctp_aloc_assoc() but is needed since other's call the add
3304          * address function
3305          */
3306         struct sctp_nets *net, *netfirst;
3307         int addr_inscope;
3308
3309         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3310             from);
3311         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3312
3313         netfirst = sctp_findnet(stcb, newaddr);
3314         if (netfirst) {
3315                 /*
3316                  * Lie and return ok, we don't want to make the association
3317                  * go away for this behavior. It will happen in the TCP
3318                  * model in a connected socket. It does not reach the hash
3319                  * table until after the association is built so it can't be
3320                  * found. Mark as reachable, since the initial creation will
3321                  * have been cleared and the NOT_IN_ASSOC flag will have
3322                  * been added... and we don't want to end up removing it
3323                  * back out.
3324                  */
3325                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3326                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3327                             SCTP_ADDR_UNCONFIRMED);
3328                 } else {
3329                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3330                 }
3331
3332                 return (0);
3333         }
3334         addr_inscope = 1;
3335         if (newaddr->sa_family == AF_INET) {
3336                 struct sockaddr_in *sin;
3337
3338                 sin = (struct sockaddr_in *)newaddr;
3339                 if (sin->sin_addr.s_addr == 0) {
3340                         /* Invalid address */
3341                         return (-1);
3342                 }
3343                 /* zero out the bzero area */
3344                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3345
3346                 /* assure len is set */
3347                 sin->sin_len = sizeof(struct sockaddr_in);
3348                 if (set_scope) {
3349 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3350                         stcb->ipv4_local_scope = 1;
3351 #else
3352                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3353                                 stcb->asoc.ipv4_local_scope = 1;
3354                         }
3355 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3356                 } else {
3357                         /* Validate the address is in scope */
3358                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3359                             (stcb->asoc.ipv4_local_scope == 0)) {
3360                                 addr_inscope = 0;
3361                         }
3362                 }
3363         } else if (newaddr->sa_family == AF_INET6) {
3364                 struct sockaddr_in6 *sin6;
3365
3366                 sin6 = (struct sockaddr_in6 *)newaddr;
3367                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3368                         /* Invalid address */
3369                         return (-1);
3370                 }
3371                 /* assure len is set */
3372                 sin6->sin6_len = sizeof(struct sockaddr_in6);
3373                 if (set_scope) {
3374                         if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3375                                 stcb->asoc.loopback_scope = 1;
3376                                 stcb->asoc.local_scope = 0;
3377                                 stcb->asoc.ipv4_local_scope = 1;
3378                                 stcb->asoc.site_scope = 1;
3379                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3380                                 /*
3381                                  * If the new destination is a LINK_LOCAL we
3382                                  * must have common site scope. Don't set
3383                                  * the local scope since we may not share
3384                                  * all links, only loopback can do this.
3385                                  * Links on the local network would also be
3386                                  * on our private network for v4 too.
3387                                  */
3388                                 stcb->asoc.ipv4_local_scope = 1;
3389                                 stcb->asoc.site_scope = 1;
3390                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3391                                 /*
3392                                  * If the new destination is SITE_LOCAL then
3393                                  * we must have site scope in common.
3394                                  */
3395                                 stcb->asoc.site_scope = 1;
3396                         }
3397                 } else {
3398                         /* Validate the address is in scope */
3399                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3400                             (stcb->asoc.loopback_scope == 0)) {
3401                                 addr_inscope = 0;
3402                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3403                             (stcb->asoc.local_scope == 0)) {
3404                                 addr_inscope = 0;
3405                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3406                             (stcb->asoc.site_scope == 0)) {
3407                                 addr_inscope = 0;
3408                         }
3409                 }
3410         } else {
3411                 /* not supported family type */
3412                 return (-1);
3413         }
3414         net = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net, struct sctp_nets);
3415         if (net == NULL) {
3416                 return (-1);
3417         }
3418         SCTP_INCR_RADDR_COUNT();
3419         bzero(net, sizeof(*net));
3420         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3421         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3422         if (newaddr->sa_family == AF_INET) {
3423                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3424         } else if (newaddr->sa_family == AF_INET6) {
3425                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3426         }
3427         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3428         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3429                 stcb->asoc.loopback_scope = 1;
3430                 stcb->asoc.ipv4_local_scope = 1;
3431                 stcb->asoc.local_scope = 0;
3432                 stcb->asoc.site_scope = 1;
3433                 addr_inscope = 1;
3434         }
3435         net->failure_threshold = stcb->asoc.def_net_failure;
3436         if (addr_inscope == 0) {
3437                 net->dest_state = (SCTP_ADDR_REACHABLE |
3438                     SCTP_ADDR_OUT_OF_SCOPE);
3439         } else {
3440                 if (from == SCTP_ADDR_IS_CONFIRMED)
3441                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3442                         net->dest_state = SCTP_ADDR_REACHABLE;
3443                 else
3444                         net->dest_state = SCTP_ADDR_REACHABLE |
3445                             SCTP_ADDR_UNCONFIRMED;
3446         }
3447         /*
3448          * We set this to 0, the timer code knows that this means its an
3449          * initial value
3450          */
3451         net->RTO = 0;
3452         net->RTO_measured = 0;
3453         stcb->asoc.numnets++;
3454         *(&net->ref_count) = 1;
3455         net->tos_flowlabel = 0;
3456 #ifdef INET
3457         if (newaddr->sa_family == AF_INET)
3458                 net->tos_flowlabel = stcb->asoc.default_tos;
3459 #endif
3460 #ifdef INET6
3461         if (newaddr->sa_family == AF_INET6)
3462                 net->tos_flowlabel = stcb->asoc.default_flowlabel;
3463 #endif
3464         /* Init the timer structure */
3465         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3466         SCTP_OS_TIMER_INIT(&net->fr_timer.timer);
3467         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3468
3469         /* Now generate a route for this guy */
3470         /* KAME hack: embed scopeid */
3471         if (newaddr->sa_family == AF_INET6) {
3472                 struct sockaddr_in6 *sin6;
3473
3474                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3475                 (void)sa6_embedscope(sin6, ip6_use_defzone);
3476                 sin6->sin6_scope_id = 0;
3477         }
3478         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3479
3480         if (newaddr->sa_family == AF_INET6) {
3481                 struct sockaddr_in6 *sin6;
3482
3483                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3484                 (void)sa6_recoverscope(sin6);
3485         }
3486         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3487                 /* Get source address */
3488                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3489                     stcb,
3490                     (sctp_route_t *) & net->ro,
3491                     net,
3492                     0,
3493                     stcb->asoc.vrf_id);
3494                 /* Now get the interface MTU */
3495                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3496                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3497                 } else {
3498                         net->mtu = 0;
3499                 }
3500 #ifdef SCTP_PRINT_FOR_B_AND_M
3501                 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu);
3502 #endif
3503                 if (net->mtu == 0) {
3504                         /* Huh ?? */
3505                         net->mtu = SCTP_DEFAULT_MTU;
3506                 } else {
3507                         uint32_t rmtu;
3508
3509                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3510 #ifdef SCTP_PRINT_FOR_B_AND_M
3511                         SCTP_PRINTF("The route mtu is %d\n", rmtu);
3512 #endif
3513                         if (rmtu == 0) {
3514                                 /*
3515                                  * Start things off to match mtu of
3516                                  * interface please.
3517                                  */
3518                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3519                                     net->ro.ro_rt, net->mtu);
3520                         } else {
3521                                 /*
3522                                  * we take the route mtu over the interface,
3523                                  * since the route may be leading out the
3524                                  * loopback, or a different interface.
3525                                  */
3526                                 net->mtu = rmtu;
3527                         }
3528                 }
3529                 if (from == SCTP_ALLOC_ASOC) {
3530 #ifdef SCTP_PRINT_FOR_B_AND_M
3531                         SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu);
3532 #endif
3533                         stcb->asoc.smallest_mtu = net->mtu;
3534                 }
3535         } else {
3536                 net->mtu = stcb->asoc.smallest_mtu;
3537         }
3538         if (stcb->asoc.smallest_mtu > net->mtu) {
3539 #ifdef SCTP_PRINT_FOR_B_AND_M
3540                 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n",
3541                     net->mtu, stcb->asoc.smallest_mtu);
3542 #endif
3543                 stcb->asoc.smallest_mtu = net->mtu;
3544         }
3545         /* JRS - Use the congestion control given in the CC module */
3546         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
3547
3548         /*
3549          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3550          * of assoc (2005/06/27, iyengar@cis.udel.edu)
3551          */
3552         net->find_pseudo_cumack = 1;
3553         net->find_rtx_pseudo_cumack = 1;
3554         net->src_addr_selected = 0;
3555         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3556         if (net->ro.ro_rt == NULL) {
3557                 /* Since we have no route put it at the back */
3558                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3559         } else if (netfirst == NULL) {
3560                 /* We are the first one in the pool. */
3561                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3562         } else if (netfirst->ro.ro_rt == NULL) {
3563                 /*
3564                  * First one has NO route. Place this one ahead of the first
3565                  * one.
3566                  */
3567                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3568         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
3569                 /*
3570                  * This one has a different interface than the one at the
3571                  * top of the list. Place it ahead.
3572                  */
3573                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3574         } else {
3575                 /*
3576                  * Ok we have the same interface as the first one. Move
3577                  * forward until we find either a) one with a NULL route...
3578                  * insert ahead of that b) one with a different ifp.. insert
3579                  * after that. c) end of the list.. insert at the tail.
3580                  */
3581                 struct sctp_nets *netlook;
3582
3583                 do {
3584                         netlook = TAILQ_NEXT(netfirst, sctp_next);
3585                         if (netlook == NULL) {
3586                                 /* End of the list */
3587                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3588                                 break;
3589                         } else if (netlook->ro.ro_rt == NULL) {
3590                                 /* next one has NO route */
3591                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
3592                                 break;
3593                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
3594                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
3595                                     net, sctp_next);
3596                                 break;
3597                         }
3598                         /* Shift forward */
3599                         netfirst = netlook;
3600                 } while (netlook != NULL);
3601         }
3602
3603         /* got to have a primary set */
3604         if (stcb->asoc.primary_destination == 0) {
3605                 stcb->asoc.primary_destination = net;
3606         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
3607                     (net->ro.ro_rt) &&
3608             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
3609                 /* No route to current primary adopt new primary */
3610                 stcb->asoc.primary_destination = net;
3611         }
3612         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
3613             net);
3614         /* Validate primary is first */
3615         net = TAILQ_FIRST(&stcb->asoc.nets);
3616         if ((net != stcb->asoc.primary_destination) &&
3617             (stcb->asoc.primary_destination)) {
3618                 /*
3619                  * first one on the list is NOT the primary sctp_cmpaddr()
3620                  * is much more efficent if the primary is the first on the
3621                  * list, make it so.
3622                  */
3623                 TAILQ_REMOVE(&stcb->asoc.nets,
3624                     stcb->asoc.primary_destination, sctp_next);
3625                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
3626                     stcb->asoc.primary_destination, sctp_next);
3627         }
3628         return (0);
3629 }
3630
3631
3632 /*
3633  * allocate an association and add it to the endpoint. The caller must be
3634  * careful to add all additional addresses once they are know right away or
3635  * else the assoc will be may experience a blackout scenario.
3636  */
3637 struct sctp_tcb *
3638 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
3639     int for_a_init, int *error, uint32_t override_tag, uint32_t vrf_id,
3640     struct thread *p
3641 )
3642 {
3643         /* note the p argument is only valid in unbound sockets */
3644
3645         struct sctp_tcb *stcb;
3646         struct sctp_association *asoc;
3647         struct sctpasochead *head;
3648         uint16_t rport;
3649         int err;
3650
3651         /*
3652          * Assumption made here: Caller has done a
3653          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
3654          * address does not exist already.
3655          */
3656         if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) {
3657                 /* Hit max assoc, sorry no more */
3658                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
3659                 *error = ENOBUFS;
3660                 return (NULL);
3661         }
3662         if (firstaddr == NULL) {
3663                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3664                 *error = EINVAL;
3665                 return (NULL);
3666         }
3667         SCTP_INP_RLOCK(inp);
3668         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
3669                 /*
3670                  * If its in the TCP pool, its NOT allowed to create an
3671                  * association. The parent listener needs to call
3672                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
3673                  * off, or connected one does this.. its an error.
3674                  */
3675                 SCTP_INP_RUNLOCK(inp);
3676                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3677                 *error = EINVAL;
3678                 return (NULL);
3679         }
3680         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
3681 #ifdef SCTP_DEBUG
3682         if (firstaddr) {
3683                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
3684                 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
3685                     ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
3686         } else {
3687                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
3688         }
3689 #endif                          /* SCTP_DEBUG */
3690         if (firstaddr->sa_family == AF_INET) {
3691                 struct sockaddr_in *sin;
3692
3693                 sin = (struct sockaddr_in *)firstaddr;
3694                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
3695                         /* Invalid address */
3696                         SCTP_INP_RUNLOCK(inp);
3697                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3698                         *error = EINVAL;
3699                         return (NULL);
3700                 }
3701                 rport = sin->sin_port;
3702         } else if (firstaddr->sa_family == AF_INET6) {
3703                 struct sockaddr_in6 *sin6;
3704
3705                 sin6 = (struct sockaddr_in6 *)firstaddr;
3706                 if ((sin6->sin6_port == 0) ||
3707                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
3708                         /* Invalid address */
3709                         SCTP_INP_RUNLOCK(inp);
3710                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3711                         *error = EINVAL;
3712                         return (NULL);
3713                 }
3714                 rport = sin6->sin6_port;
3715         } else {
3716                 /* not supported family type */
3717                 SCTP_INP_RUNLOCK(inp);
3718                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3719                 *error = EINVAL;
3720                 return (NULL);
3721         }
3722         SCTP_INP_RUNLOCK(inp);
3723         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
3724                 /*
3725                  * If you have not performed a bind, then we need to do the
3726                  * ephemerial bind for you.
3727                  */
3728                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
3729                     (struct sockaddr *)NULL,
3730                     (struct sctp_ifa *)NULL,
3731                     p
3732                     ))) {
3733                         /* bind error, probably perm */
3734                         *error = err;
3735                         return (NULL);
3736                 }
3737         }
3738         stcb = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc, struct sctp_tcb);
3739         if (stcb == NULL) {
3740                 /* out of memory? */
3741                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
3742                 *error = ENOMEM;
3743                 return (NULL);
3744         }
3745         SCTP_INCR_ASOC_COUNT();
3746
3747         bzero(stcb, sizeof(*stcb));
3748         asoc = &stcb->asoc;
3749         SCTP_TCB_LOCK_INIT(stcb);
3750         SCTP_TCB_SEND_LOCK_INIT(stcb);
3751         /* setup back pointer's */
3752         stcb->sctp_ep = inp;
3753         stcb->sctp_socket = inp->sctp_socket;
3754         if ((err = sctp_init_asoc(inp, stcb, for_a_init, override_tag, vrf_id))) {
3755                 /* failed */
3756                 SCTP_TCB_LOCK_DESTROY(stcb);
3757                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3758                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3759                 SCTP_DECR_ASOC_COUNT();
3760                 *error = err;
3761                 return (NULL);
3762         }
3763         /* and the port */
3764         stcb->rport = rport;
3765         SCTP_INP_INFO_WLOCK();
3766         SCTP_INP_WLOCK(inp);
3767         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3768                 /* inpcb freed while alloc going on */
3769                 SCTP_TCB_LOCK_DESTROY(stcb);
3770                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3771                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3772                 SCTP_INP_WUNLOCK(inp);
3773                 SCTP_INP_INFO_WUNLOCK();
3774                 SCTP_DECR_ASOC_COUNT();
3775                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3776                 *error = EINVAL;
3777                 return (NULL);
3778         }
3779         SCTP_TCB_LOCK(stcb);
3780
3781         /* now that my_vtag is set, add it to the hash */
3782         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
3783             sctppcbinfo.hashasocmark)];
3784         /* put it in the bucket in the vtag hash of assoc's for the system */
3785         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
3786         sctp_delete_from_timewait(stcb->asoc.my_vtag);
3787
3788         SCTP_INP_INFO_WUNLOCK();
3789
3790         if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
3791                 /* failure.. memory error? */
3792                 if (asoc->strmout) {
3793                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
3794                         asoc->strmout = NULL;
3795                 }
3796                 if (asoc->mapping_array) {
3797                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
3798                         asoc->mapping_array = NULL;
3799                 }
3800                 SCTP_DECR_ASOC_COUNT();
3801                 SCTP_TCB_LOCK_DESTROY(stcb);
3802                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3803                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3804                 SCTP_INP_WUNLOCK(inp);
3805                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
3806                 *error = ENOBUFS;
3807                 return (NULL);
3808         }
3809         /* Init all the timers */
3810         SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer);
3811         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
3812         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
3813         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
3814         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
3815         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
3816         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
3817         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
3818
3819         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
3820         /* now file the port under the hash as well */
3821         if (inp->sctp_tcbhash != NULL) {
3822                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
3823                     inp->sctp_hashmark)];
3824                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
3825         }
3826         SCTP_INP_WUNLOCK(inp);
3827         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
3828         return (stcb);
3829 }
3830
3831
3832 void
3833 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
3834 {
3835         struct sctp_association *asoc;
3836
3837         asoc = &stcb->asoc;
3838         asoc->numnets--;
3839         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3840         if (net == asoc->primary_destination) {
3841                 /* Reset primary */
3842                 struct sctp_nets *lnet;
3843
3844                 lnet = TAILQ_FIRST(&asoc->nets);
3845                 /*
3846                  * Mobility adaptation Ideally, if deleted destination is
3847                  * the primary, it becomes a fast retransmission trigger by
3848                  * the subsequent SET PRIMARY. (by micchie)
3849                  */
3850                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
3851                     SCTP_MOBILITY_BASE) ||
3852                     sctp_is_mobility_feature_on(stcb->sctp_ep,
3853                     SCTP_MOBILITY_FASTHANDOFF)) {
3854                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
3855                         if (asoc->deleted_primary != NULL) {
3856                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
3857                                 goto leave;
3858                         }
3859                         asoc->deleted_primary = net;
3860                         atomic_add_int(&net->ref_count, 1);
3861                         memset(&net->lastsa, 0, sizeof(net->lastsa));
3862                         memset(&net->lastsv, 0, sizeof(net->lastsv));
3863                         sctp_mobility_feature_on(stcb->sctp_ep,
3864                             SCTP_MOBILITY_PRIM_DELETED);
3865                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
3866                             stcb->sctp_ep, stcb, NULL);
3867                 }
3868 leave:
3869                 /* Try to find a confirmed primary */
3870                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
3871         }
3872         if (net == asoc->last_data_chunk_from) {
3873                 /* Reset primary */
3874                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
3875         }
3876         if (net == asoc->last_control_chunk_from) {
3877                 /* Clear net */
3878                 asoc->last_control_chunk_from = NULL;
3879         }
3880         sctp_free_remote_addr(net);
3881 }
3882
3883 /*
3884  * remove a remote endpoint address from an association, it will fail if the
3885  * address does not exist.
3886  */
3887 int
3888 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
3889 {
3890         /*
3891          * Here we need to remove a remote address. This is quite simple, we
3892          * first find it in the list of address for the association
3893          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
3894          * on that item. Note we do not allow it to be removed if there are
3895          * no other addresses.
3896          */
3897         struct sctp_association *asoc;
3898         struct sctp_nets *net, *net_tmp;
3899
3900         asoc = &stcb->asoc;
3901
3902         /* locate the address */
3903         for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
3904                 net_tmp = TAILQ_NEXT(net, sctp_next);
3905                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
3906                         continue;
3907                 }
3908                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
3909                     remaddr)) {
3910                         /* we found the guy */
3911                         if (asoc->numnets < 2) {
3912                                 /* Must have at LEAST two remote addresses */
3913                                 return (-1);
3914                         } else {
3915                                 sctp_remove_net(stcb, net);
3916                                 return (0);
3917                         }
3918                 }
3919         }
3920         /* not found. */
3921         return (-2);
3922 }
3923
3924 void
3925 sctp_delete_from_timewait(uint32_t tag)
3926 {
3927         struct sctpvtaghead *chain;
3928         struct sctp_tagblock *twait_block;
3929         int found = 0;
3930         int i;
3931
3932         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
3933         if (!SCTP_LIST_EMPTY(chain)) {
3934                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
3935                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
3936                                 if (twait_block->vtag_block[i].v_tag == tag) {
3937                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
3938                                         twait_block->vtag_block[i].v_tag = 0;
3939                                         found = 1;
3940                                         break;
3941                                 }
3942                         }
3943                         if (found)
3944                                 break;
3945                 }
3946         }
3947 }
3948
3949 int
3950 sctp_is_in_timewait(uint32_t tag)
3951 {
3952         struct sctpvtaghead *chain;
3953         struct sctp_tagblock *twait_block;
3954         int found = 0;
3955         int i;
3956
3957         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
3958         if (!SCTP_LIST_EMPTY(chain)) {
3959                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
3960                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
3961                                 if (twait_block->vtag_block[i].v_tag == tag) {
3962                                         found = 1;
3963                                         break;
3964                                 }
3965                         }
3966                         if (found)
3967                                 break;
3968                 }
3969         }
3970         return (found);
3971 }
3972
3973
3974 void
3975 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time)
3976 {
3977         struct sctpvtaghead *chain;
3978         struct sctp_tagblock *twait_block;
3979         struct timeval now;
3980         int set, i;
3981
3982         (void)SCTP_GETTIME_TIMEVAL(&now);
3983         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
3984         set = 0;
3985         if (!SCTP_LIST_EMPTY(chain)) {
3986                 /* Block(s) present, lets find space, and expire on the fly */
3987                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
3988                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
3989                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
3990                                     !set) {
3991                                         twait_block->vtag_block[i].tv_sec_at_expire =
3992                                             now.tv_sec + time;
3993                                         twait_block->vtag_block[i].v_tag = tag;
3994                                         set = 1;
3995                                 } else if ((twait_block->vtag_block[i].v_tag) &&
3996                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
3997                                         /* Audit expires this guy */
3998                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
3999                                         twait_block->vtag_block[i].v_tag = 0;
4000                                         if (set == 0) {
4001                                                 /* Reuse it for my new tag */
4002                                                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4003                                                 twait_block->vtag_block[0].v_tag = tag;
4004                                                 set = 1;
4005                                         }
4006                                 }
4007                         }
4008                         if (set) {
4009                                 /*
4010                                  * We only do up to the block where we can
4011                                  * place our tag for audits
4012                                  */
4013                                 break;
4014                         }
4015                 }
4016         }
4017         /* Need to add a new block to chain */
4018         if (!set) {
4019                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4020                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4021                 if (twait_block == NULL) {
4022                         return;
4023                 }
4024                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4025                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4026                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4027                 twait_block->vtag_block[0].v_tag = tag;
4028         }
4029 }
4030
4031
4032 static void
4033 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4034 {
4035         struct sctp_iterator *it;
4036
4037         /*
4038          * Unlock the tcb lock we do this so we avoid a dead lock scenario
4039          * where the iterator is waiting on the TCB lock and the TCB lock is
4040          * waiting on the iterator lock.
4041          */
4042         it = stcb->asoc.stcb_starting_point_for_iterator;
4043         if (it == NULL) {
4044                 return;
4045         }
4046         if (it->inp != stcb->sctp_ep) {
4047                 /* hmm, focused on the wrong one? */
4048                 return;
4049         }
4050         if (it->stcb != stcb) {
4051                 return;
4052         }
4053         it->stcb = LIST_NEXT(stcb, sctp_tcblist);
4054         if (it->stcb == NULL) {
4055                 /* done with all asoc's in this assoc */
4056                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
4057                         it->inp = NULL;
4058                 } else {
4059                         it->inp = LIST_NEXT(inp, sctp_list);
4060                 }
4061         }
4062 }
4063
4064
4065 /*-
4066  * Free the association after un-hashing the remote port. This
4067  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4068  * expect that the input to this function IS a locked TCB.
4069  * It will return 0, if it did NOT destroy the association (instead
4070  * it unlocks it. It will return NON-zero if it either destroyed the
4071  * association OR the association is already destroyed.
4072  */
4073 int
4074 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4075 {
4076         int i;
4077         struct sctp_association *asoc;
4078         struct sctp_nets *net, *prev;
4079         struct sctp_laddr *laddr;
4080         struct sctp_tmit_chunk *chk;
4081         struct sctp_asconf_addr *aparam;
4082         struct sctp_asconf_ack *aack;
4083         struct sctp_stream_reset_list *liste;
4084         struct sctp_queued_to_read *sq;
4085         struct sctp_stream_queue_pending *sp;
4086         sctp_sharedkey_t *shared_key;
4087         struct socket *so;
4088         int ccnt = 0;
4089         int cnt = 0;
4090
4091         /* first, lets purge the entry from the hash table. */
4092
4093 #ifdef SCTP_LOG_CLOSING
4094         sctp_log_closing(inp, stcb, 6);
4095 #endif
4096         if (stcb->asoc.state == 0) {
4097 #ifdef SCTP_LOG_CLOSING
4098                 sctp_log_closing(inp, NULL, 7);
4099 #endif
4100                 /* there is no asoc, really TSNH :-0 */
4101                 return (1);
4102         }
4103         /* TEMP CODE */
4104         if (stcb->freed_from_where == 0) {
4105                 /* Only record the first place free happened from */
4106                 stcb->freed_from_where = from_location;
4107         }
4108         /* TEMP CODE */
4109
4110         asoc = &stcb->asoc;
4111         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4112             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4113                 /* nothing around */
4114                 so = NULL;
4115         else
4116                 so = inp->sctp_socket;
4117
4118         /*
4119          * We used timer based freeing if a reader or writer is in the way.
4120          * So we first check if we are actually being called from a timer,
4121          * if so we abort early if a reader or writer is still in the way.
4122          */
4123         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4124             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4125                 /*
4126                  * is it the timer driving us? if so are the reader/writers
4127                  * gone?
4128                  */
4129                 if (stcb->asoc.refcnt) {
4130                         /* nope, reader or writer in the way */
4131                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4132                         /* no asoc destroyed */
4133                         SCTP_TCB_UNLOCK(stcb);
4134 #ifdef SCTP_LOG_CLOSING
4135                         sctp_log_closing(inp, stcb, 8);
4136 #endif
4137                         return (0);
4138                 }
4139         }
4140         /* now clean up any other timers */
4141         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4142         asoc->hb_timer.self = NULL;
4143         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4144         asoc->dack_timer.self = NULL;
4145         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4146         /*-
4147          * For stream reset we don't blast this unless
4148          * it is a str-reset timer, it might be the
4149          * free-asoc timer which we DON'T want to
4150          * disturb.
4151          */
4152         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4153                 asoc->strreset_timer.self = NULL;
4154         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4155         asoc->asconf_timer.self = NULL;
4156         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4157         asoc->autoclose_timer.self = NULL;
4158         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4159         asoc->shut_guard_timer.self = NULL;
4160         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4161         asoc->delayed_event_timer.self = NULL;
4162         /* Mobility adaptation */
4163         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4164         asoc->delete_prim_timer.self = NULL;
4165         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4166                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4167                 net->fr_timer.self = NULL;
4168                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4169                 net->rxt_timer.self = NULL;
4170                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4171                 net->pmtu_timer.self = NULL;
4172         }
4173         /* Now the read queue needs to be cleaned up (only once) */
4174         cnt = 0;
4175         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4176                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4177                 SCTP_INP_READ_LOCK(inp);
4178                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4179                         if (sq->stcb == stcb) {
4180                                 sq->do_not_ref_stcb = 1;
4181                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4182                                 /*
4183                                  * If there is no end, there never will be
4184                                  * now.
4185                                  */
4186                                 if (sq->end_added == 0) {
4187                                         /* Held for PD-API clear that. */
4188                                         sq->pdapi_aborted = 1;
4189                                         sq->held_length = 0;
4190                                         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4191                                                 /*
4192                                                  * Need to add a PD-API
4193                                                  * aborted indication.
4194                                                  * Setting the control_pdapi
4195                                                  * assures that it will be
4196                                                  * added right after this
4197                                                  * msg.
4198                                                  */
4199                                                 uint32_t strseq;
4200
4201                                                 stcb->asoc.control_pdapi = sq;
4202                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4203                                                 sctp_notify_partial_delivery_indication(stcb,
4204                                                     SCTP_PARTIAL_DELIVERY_ABORTED, 1, strseq);
4205                                                 stcb->asoc.control_pdapi = NULL;
4206                                         }
4207                                 }
4208                                 /* Add an end to wake them */
4209                                 sq->end_added = 1;
4210                                 cnt++;
4211                         }
4212                 }
4213                 SCTP_INP_READ_UNLOCK(inp);
4214                 if (stcb->block_entry) {
4215                         cnt++;
4216                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4217                         stcb->block_entry->error = ECONNRESET;
4218                         stcb->block_entry = NULL;
4219                 }
4220         }
4221         if (stcb->asoc.refcnt) {
4222                 /*
4223                  * reader or writer in the way, we have hopefully given him
4224                  * something to chew on above.
4225                  */
4226                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4227                 SCTP_TCB_UNLOCK(stcb);
4228                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4229                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4230                         /* nothing around */
4231                         so = NULL;
4232                 if (so) {
4233                         /* Wake any reader/writers */
4234                         sctp_sorwakeup(inp, so);
4235                         sctp_sowwakeup(inp, so);
4236                 }
4237 #ifdef SCTP_LOG_CLOSING
4238                 sctp_log_closing(inp, stcb, 9);
4239 #endif
4240                 /* no asoc destroyed */
4241                 return (0);
4242         }
4243 #ifdef SCTP_LOG_CLOSING
4244         sctp_log_closing(inp, stcb, 10);
4245 #endif
4246         /*
4247          * When I reach here, no others want to kill the assoc yet.. and I
4248          * own the lock. Now its possible an abort comes in when I do the
4249          * lock exchange below to grab all the locks to do the final take
4250          * out. to prevent this we increment the count, which will start a
4251          * timer and blow out above thus assuring us that we hold exclusive
4252          * killing of the asoc. Note that after getting back the TCB lock we
4253          * will go ahead and increment the counter back up and stop any
4254          * timer a passing stranger may have started :-S
4255          */
4256         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4257                 atomic_add_int(&stcb->asoc.refcnt, 1);
4258
4259                 SCTP_TCB_UNLOCK(stcb);
4260
4261                 SCTP_ITERATOR_LOCK();
4262                 SCTP_INP_INFO_WLOCK();
4263                 SCTP_INP_WLOCK(inp);
4264                 SCTP_TCB_LOCK(stcb);
4265         }
4266         /* Double check the GONE flag */
4267         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4268             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4269                 /* nothing around */
4270                 so = NULL;
4271
4272         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4273             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4274                 /*
4275                  * For TCP type we need special handling when we are
4276                  * connected. We also include the peel'ed off ones to.
4277                  */
4278                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4279                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4280                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4281                         if (so) {
4282                                 SOCK_LOCK(so);
4283                                 if (so->so_rcv.sb_cc == 0) {
4284                                         so->so_state &= ~(SS_ISCONNECTING |
4285                                             SS_ISDISCONNECTING |
4286                                             SS_ISCONFIRMING |
4287                                             SS_ISCONNECTED);
4288                                 }
4289                                 SOCK_UNLOCK(so);
4290                                 socantrcvmore(so);
4291                                 sctp_sowwakeup(inp, so);
4292                                 sctp_sorwakeup(inp, so);
4293                                 SCTP_SOWAKEUP(so);
4294                         }
4295                 }
4296         }
4297         /*
4298          * Make it invalid too, that way if its about to run it will abort
4299          * and return.
4300          */
4301         sctp_iterator_asoc_being_freed(inp, stcb);
4302         /* re-increment the lock */
4303         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4304                 atomic_add_int(&stcb->asoc.refcnt, -1);
4305         }
4306         asoc->state = 0;
4307         if (inp->sctp_tcbhash) {
4308                 LIST_REMOVE(stcb, sctp_tcbhash);
4309         }
4310         if (stcb->asoc.in_restart_hash) {
4311                 LIST_REMOVE(stcb, sctp_tcbrestarhash);
4312         }
4313         /* Now lets remove it from the list of ALL associations in the EP */
4314         LIST_REMOVE(stcb, sctp_tcblist);
4315         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4316                 SCTP_INP_INCR_REF(inp);
4317                 SCTP_INP_WUNLOCK(inp);
4318                 SCTP_ITERATOR_UNLOCK();
4319         }
4320         /* pull from vtag hash */
4321         LIST_REMOVE(stcb, sctp_asocs);
4322         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_TIME_WAIT);
4323
4324         /*
4325          * Now restop the timers to be sure - this is paranoia at is finest!
4326          */
4327         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4328         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4329         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4330         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4331         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4332         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4333         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4334         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4335         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4336                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4337                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4338                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4339         }
4340
4341         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4342         prev = NULL;
4343         /*
4344          * The chunk lists and such SHOULD be empty but we check them just
4345          * in case.
4346          */
4347         /* anything on the wheel needs to be removed */
4348         for (i = 0; i < asoc->streamoutcnt; i++) {
4349                 struct sctp_stream_out *outs;
4350
4351                 outs = &asoc->strmout[i];
4352                 /* now clean up any chunks here */
4353                 sp = TAILQ_FIRST(&outs->outqueue);
4354                 while (sp) {
4355                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4356                         if (sp->data) {
4357                                 sctp_m_freem(sp->data);
4358                                 sp->data = NULL;
4359                                 sp->tail_mbuf = NULL;
4360                         }
4361                         sctp_free_remote_addr(sp->net);
4362                         sctp_free_spbufspace(stcb, asoc, sp);
4363                         /* Free the zone stuff  */
4364                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_strmoq, sp);
4365                         SCTP_DECR_STRMOQ_COUNT();
4366                         /* sa_ignore FREED_MEMORY */
4367                         sp = TAILQ_FIRST(&outs->outqueue);
4368                 }
4369         }
4370
4371         /* sa_ignore FREED_MEMORY */
4372         while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) {
4373                 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp);
4374                 SCTP_FREE(liste, SCTP_M_STRESET);
4375         }
4376
4377         sq = TAILQ_FIRST(&asoc->pending_reply_queue);
4378         while (sq) {
4379                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4380                 if (sq->data) {
4381                         sctp_m_freem(sq->data);
4382                         sq->data = NULL;
4383                 }
4384                 sctp_free_remote_addr(sq->whoFrom);
4385                 sq->whoFrom = NULL;
4386                 sq->stcb = NULL;
4387                 /* Free the ctl entry */
4388                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq);
4389                 SCTP_DECR_READQ_COUNT();
4390                 /* sa_ignore FREED_MEMORY */
4391                 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
4392         }
4393
4394         chk = TAILQ_FIRST(&asoc->free_chunks);
4395         while (chk) {
4396                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4397                 if (chk->data) {
4398                         sctp_m_freem(chk->data);
4399                         chk->data = NULL;
4400                 }
4401                 ccnt++;
4402                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4403                 SCTP_DECR_CHK_COUNT();
4404                 atomic_subtract_int(&sctppcbinfo.ipi_free_chunks, 1);
4405                 asoc->free_chunk_cnt--;
4406                 /* sa_ignore FREED_MEMORY */
4407                 chk = TAILQ_FIRST(&asoc->free_chunks);
4408         }
4409         /* pending send queue SHOULD be empty */
4410         if (!TAILQ_EMPTY(&asoc->send_queue)) {
4411                 chk = TAILQ_FIRST(&asoc->send_queue);
4412                 while (chk) {
4413                         TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4414                         if (chk->data) {
4415                                 sctp_m_freem(chk->data);
4416                                 chk->data = NULL;
4417                         }
4418                         ccnt++;
4419                         sctp_free_remote_addr(chk->whoTo);
4420                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4421                         SCTP_DECR_CHK_COUNT();
4422                         /* sa_ignore FREED_MEMORY */
4423                         chk = TAILQ_FIRST(&asoc->send_queue);
4424                 }
4425         }
4426 /*
4427   if(ccnt) {
4428   printf("Freed %d from send_queue\n", ccnt);
4429   ccnt = 0;
4430   }
4431 */
4432         /* sent queue SHOULD be empty */
4433         if (!TAILQ_EMPTY(&asoc->sent_queue)) {
4434                 chk = TAILQ_FIRST(&asoc->sent_queue);
4435                 while (chk) {
4436                         TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4437                         if (chk->data) {
4438                                 sctp_m_freem(chk->data);
4439                                 chk->data = NULL;
4440                         }
4441                         ccnt++;
4442                         sctp_free_remote_addr(chk->whoTo);
4443                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4444                         SCTP_DECR_CHK_COUNT();
4445                         /* sa_ignore FREED_MEMORY */
4446                         chk = TAILQ_FIRST(&asoc->sent_queue);
4447                 }
4448         }
4449 /*
4450   if(ccnt) {
4451   printf("Freed %d from sent_queue\n", ccnt);
4452   ccnt = 0;
4453   }
4454 */
4455         /* control queue MAY not be empty */
4456         if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
4457                 chk = TAILQ_FIRST(&asoc->control_send_queue);
4458                 while (chk) {
4459                         TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4460                         if (chk->data) {
4461                                 sctp_m_freem(chk->data);
4462                                 chk->data = NULL;
4463                         }
4464                         ccnt++;
4465                         sctp_free_remote_addr(chk->whoTo);
4466                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4467                         SCTP_DECR_CHK_COUNT();
4468                         /* sa_ignore FREED_MEMORY */
4469                         chk = TAILQ_FIRST(&asoc->control_send_queue);
4470                 }
4471         }
4472 /*
4473   if(ccnt) {
4474   printf("Freed %d from ctrl_queue\n", ccnt);
4475   ccnt = 0;
4476   }
4477 */
4478         if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
4479                 chk = TAILQ_FIRST(&asoc->reasmqueue);
4480                 while (chk) {
4481                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
4482                         if (chk->data) {
4483                                 sctp_m_freem(chk->data);
4484                                 chk->data = NULL;
4485                         }
4486                         sctp_free_remote_addr(chk->whoTo);
4487                         ccnt++;
4488                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4489                         SCTP_DECR_CHK_COUNT();
4490                         /* sa_ignore FREED_MEMORY */
4491                         chk = TAILQ_FIRST(&asoc->reasmqueue);
4492                 }
4493         }
4494 /*
4495   if(ccnt) {
4496   printf("Freed %d from reasm_queue\n", ccnt);
4497   ccnt = 0;
4498   }
4499 */
4500         if (asoc->mapping_array) {
4501                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4502                 asoc->mapping_array = NULL;
4503         }
4504         /* the stream outs */
4505         if (asoc->strmout) {
4506                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4507                 asoc->strmout = NULL;
4508         }
4509         asoc->streamoutcnt = 0;
4510         if (asoc->strmin) {
4511                 struct sctp_queued_to_read *ctl;
4512
4513                 for (i = 0; i < asoc->streamincnt; i++) {
4514                         if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
4515                                 /* We have somethings on the streamin queue */
4516                                 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4517                                 while (ctl) {
4518                                         TAILQ_REMOVE(&asoc->strmin[i].inqueue,
4519                                             ctl, next);
4520                                         sctp_free_remote_addr(ctl->whoFrom);
4521                                         if (ctl->data) {
4522                                                 sctp_m_freem(ctl->data);
4523                                                 ctl->data = NULL;
4524                                         }
4525                                         /*
4526                                          * We don't free the address here
4527                                          * since all the net's were freed
4528                                          * above.
4529                                          */
4530                                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl);
4531                                         SCTP_DECR_READQ_COUNT();
4532                                         ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4533                                 }
4534                         }
4535                 }
4536                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
4537                 asoc->strmin = NULL;
4538         }
4539         asoc->streamincnt = 0;
4540         while (!TAILQ_EMPTY(&asoc->nets)) {
4541                 /* sa_ignore FREED_MEMORY */
4542                 net = TAILQ_FIRST(&asoc->nets);
4543                 /* pull from list */
4544                 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) {
4545 #ifdef INVARIANTS
4546                         panic("no net's left alloc'ed, or list points to itself");
4547 #endif
4548                         break;
4549                 }
4550                 prev = net;
4551                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4552                 sctp_free_remote_addr(net);
4553         }
4554
4555         while (!SCTP_LIST_EMPTY(&asoc->sctp_restricted_addrs)) {
4556                 /* sa_ignore FREED_MEMORY */
4557                 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs);
4558                 sctp_remove_laddr(laddr);
4559         }
4560
4561         /* pending asconf (address) parameters */
4562         while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
4563                 /* sa_ignore FREED_MEMORY */
4564                 aparam = TAILQ_FIRST(&asoc->asconf_queue);
4565                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
4566                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
4567         }
4568         while (!TAILQ_EMPTY(&asoc->asconf_ack_sent)) {
4569                 /* sa_ignore FREED_MEMORY */
4570                 aack = TAILQ_FIRST(&asoc->asconf_ack_sent);
4571                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
4572                 if (aack->data != NULL) {
4573                         sctp_m_freem(aack->data);
4574                 }
4575                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asconf_ack, aack);
4576         }
4577         /* clean up auth stuff */
4578         if (asoc->local_hmacs)
4579                 sctp_free_hmaclist(asoc->local_hmacs);
4580         if (asoc->peer_hmacs)
4581                 sctp_free_hmaclist(asoc->peer_hmacs);
4582
4583         if (asoc->local_auth_chunks)
4584                 sctp_free_chunklist(asoc->local_auth_chunks);
4585         if (asoc->peer_auth_chunks)
4586                 sctp_free_chunklist(asoc->peer_auth_chunks);
4587
4588         sctp_free_authinfo(&asoc->authinfo);
4589
4590         shared_key = LIST_FIRST(&asoc->shared_keys);
4591         while (shared_key) {
4592                 LIST_REMOVE(shared_key, next);
4593                 sctp_free_sharedkey(shared_key);
4594                 /* sa_ignore FREED_MEMORY */
4595                 shared_key = LIST_FIRST(&asoc->shared_keys);
4596         }
4597
4598         /* Insert new items here :> */
4599
4600         /* Get rid of LOCK */
4601         SCTP_TCB_LOCK_DESTROY(stcb);
4602         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4603         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4604                 SCTP_INP_INFO_WUNLOCK();
4605                 SCTP_INP_RLOCK(inp);
4606         }
4607 #ifdef SCTP_TRACK_FREED_ASOCS
4608         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4609                 /* now clean up the tasoc itself */
4610                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
4611                 SCTP_DECR_ASOC_COUNT();
4612         } else {
4613                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
4614         }
4615 #else
4616         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
4617         SCTP_DECR_ASOC_COUNT();
4618 #endif
4619         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4620                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4621                         /*
4622                          * If its NOT the inp_free calling us AND sctp_close
4623                          * as been called, we call back...
4624                          */
4625                         SCTP_INP_RUNLOCK(inp);
4626                         /*
4627                          * This will start the kill timer (if we are the
4628                          * lastone) since we hold an increment yet. But this
4629                          * is the only safe way to do this since otherwise
4630                          * if the socket closes at the same time we are here
4631                          * we might collide in the cleanup.
4632                          */
4633                         sctp_inpcb_free(inp,
4634                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
4635                             SCTP_CALLED_DIRECTLY_NOCMPSET);
4636                         SCTP_INP_DECR_REF(inp);
4637                         goto out_of;
4638                 } else {
4639                         /* The socket is still open. */
4640                         SCTP_INP_DECR_REF(inp);
4641                 }
4642         }
4643         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4644                 SCTP_INP_RUNLOCK(inp);
4645         }
4646 out_of:
4647         /* destroyed the asoc */
4648 #ifdef SCTP_LOG_CLOSING
4649         sctp_log_closing(inp, NULL, 11);
4650 #endif
4651         return (1);
4652 }
4653
4654
4655
4656 /*
4657  * determine if a destination is "reachable" based upon the addresses bound
4658  * to the current endpoint (e.g. only v4 or v6 currently bound)
4659  */
4660 /*
4661  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
4662  * assoc level v4/v6 flags, as the assoc *may* not have the same address
4663  * types bound as its endpoint
4664  */
4665 int
4666 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
4667 {
4668         struct sctp_inpcb *inp;
4669         int answer;
4670
4671         /*
4672          * No locks here, the TCB, in all cases is already locked and an
4673          * assoc is up. There is either a INP lock by the caller applied (in
4674          * asconf case when deleting an address) or NOT in the HB case,
4675          * however if HB then the INP increment is up and the INP will not
4676          * be removed (on top of the fact that we have a TCB lock). So we
4677          * only want to read the sctp_flags, which is either bound-all or
4678          * not.. no protection needed since once an assoc is up you can't be
4679          * changing your binding.
4680          */
4681         inp = stcb->sctp_ep;
4682         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4683                 /* if bound all, destination is not restricted */
4684                 /*
4685                  * RRS: Question during lock work: Is this correct? If you
4686                  * are bound-all you still might need to obey the V4--V6
4687                  * flags??? IMO this bound-all stuff needs to be removed!
4688                  */
4689                 return (1);
4690         }
4691         /* NOTE: all "scope" checks are done when local addresses are added */
4692         if (destaddr->sa_family == AF_INET6) {
4693                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
4694         } else if (destaddr->sa_family == AF_INET) {
4695                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
4696         } else {
4697                 /* invalid family, so it's unreachable */
4698                 answer = 0;
4699         }
4700         return (answer);
4701 }
4702
4703 /*
4704  * update the inp_vflags on an endpoint
4705  */
4706 static void
4707 sctp_update_ep_vflag(struct sctp_inpcb *inp)
4708 {
4709         struct sctp_laddr *laddr;
4710
4711         /* first clear the flag */
4712         inp->ip_inp.inp.inp_vflag = 0;
4713         /* set the flag based on addresses on the ep list */
4714         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4715                 if (laddr->ifa == NULL) {
4716                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
4717                             __FUNCTION__);
4718                         continue;
4719                 }
4720                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
4721                         continue;
4722                 }
4723                 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
4724                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
4725                 } else if (laddr->ifa->address.sa.sa_family == AF_INET) {
4726                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
4727                 }
4728         }
4729 }
4730
4731 /*
4732  * Add the address to the endpoint local address list There is nothing to be
4733  * done if we are bound to all addresses
4734  */
4735 void
4736 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
4737 {
4738         struct sctp_laddr *laddr;
4739         int fnd, error = 0;
4740
4741         fnd = 0;
4742
4743         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4744                 /* You are already bound to all. You have it already */
4745                 return;
4746         }
4747         if (ifa->address.sa.sa_family == AF_INET6) {
4748                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
4749                         /* Can't bind a non-useable addr. */
4750                         return;
4751                 }
4752         }
4753         /* first, is it already present? */
4754         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4755                 if (laddr->ifa == ifa) {
4756                         fnd = 1;
4757                         break;
4758                 }
4759         }
4760
4761         if (fnd == 0) {
4762                 /* Not in the ep list */
4763                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
4764                 if (error != 0)
4765                         return;
4766                 inp->laddr_count++;
4767                 /* update inp_vflag flags */
4768                 if (ifa->address.sa.sa_family == AF_INET6) {
4769                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
4770                 } else if (ifa->address.sa.sa_family == AF_INET) {
4771                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
4772                 }
4773         }
4774         return;
4775 }
4776
4777
4778 /*
4779  * select a new (hopefully reachable) destination net (should only be used
4780  * when we deleted an ep addr that is the only usable source address to reach
4781  * the destination net)
4782  */
4783 static void
4784 sctp_select_primary_destination(struct sctp_tcb *stcb)
4785 {
4786         struct sctp_nets *net;
4787
4788         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4789                 /* for now, we'll just pick the first reachable one we find */
4790                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
4791                         continue;
4792                 if (sctp_destination_is_reachable(stcb,
4793                     (struct sockaddr *)&net->ro._l_addr)) {
4794                         /* found a reachable destination */
4795                         stcb->asoc.primary_destination = net;
4796                 }
4797         }
4798         /* I can't there from here! ...we're gonna die shortly... */
4799 }
4800
4801
4802 /*
4803  * Delete the address from the endpoint local address list There is nothing
4804  * to be done if we are bound to all addresses
4805  */
4806 void
4807 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
4808 {
4809         struct sctp_laddr *laddr;
4810         int fnd;
4811
4812         fnd = 0;
4813         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4814                 /* You are already bound to all. You have it already */
4815                 return;
4816         }
4817         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4818                 if (laddr->ifa == ifa) {
4819                         fnd = 1;
4820                         break;
4821                 }
4822         }
4823         if (fnd && (inp->laddr_count < 2)) {
4824                 /* can't delete unless there are at LEAST 2 addresses */
4825                 return;
4826         }
4827         if (fnd) {
4828                 /*
4829                  * clean up any use of this address go through our
4830                  * associations and clear any last_used_address that match
4831                  * this one for each assoc, see if a new primary_destination
4832                  * is needed
4833                  */
4834                 struct sctp_tcb *stcb;
4835
4836                 /* clean up "next_addr_touse" */
4837                 if (inp->next_addr_touse == laddr)
4838                         /* delete this address */
4839                         inp->next_addr_touse = NULL;
4840
4841                 /* clean up "last_used_address" */
4842                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
4843                         struct sctp_nets *net;
4844
4845                         SCTP_TCB_LOCK(stcb);
4846                         if (stcb->asoc.last_used_address == laddr)
4847                                 /* delete this address */
4848                                 stcb->asoc.last_used_address = NULL;
4849                         /*
4850                          * Now spin through all the nets and purge any ref
4851                          * to laddr
4852                          */
4853                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4854                                 if (net->ro._s_addr &&
4855                                     (net->ro._s_addr->ifa == laddr->ifa)) {
4856                                         /* Yep, purge src address selected */
4857                                         sctp_rtentry_t *rt;
4858
4859                                         /* delete this address if cached */
4860                                         rt = net->ro.ro_rt;
4861                                         if (rt != NULL) {
4862                                                 RTFREE(rt);
4863                                                 net->ro.ro_rt = NULL;
4864                                         }
4865                                         sctp_free_ifa(net->ro._s_addr);
4866                                         net->ro._s_addr = NULL;
4867                                         net->src_addr_selected = 0;
4868                                 }
4869                         }
4870                         SCTP_TCB_UNLOCK(stcb);
4871                 }               /* for each tcb */
4872                 /* remove it from the ep list */
4873                 sctp_remove_laddr(laddr);
4874                 inp->laddr_count--;
4875                 /* update inp_vflag flags */
4876                 sctp_update_ep_vflag(inp);
4877         }
4878         return;
4879 }
4880
4881 /*
4882  * Add the address to the TCB local address restricted list.
4883  * This is a "pending" address list (eg. addresses waiting for an
4884  * ASCONF-ACK response) and cannot be used as a valid source address.
4885  */
4886 void
4887 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
4888 {
4889         struct sctp_inpcb *inp;
4890         struct sctp_laddr *laddr;
4891         struct sctpladdr *list;
4892
4893         /*
4894          * Assumes TCB is locked.. and possibly the INP. May need to
4895          * confirm/fix that if we need it and is not the case.
4896          */
4897         list = &stcb->asoc.sctp_restricted_addrs;
4898
4899         inp = stcb->sctp_ep;
4900         if (ifa->address.sa.sa_family == AF_INET6) {
4901                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
4902                         /* Can't bind a non-existent addr. */
4903                         return;
4904                 }
4905         }
4906         /* does the address already exist? */
4907         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
4908                 if (laddr->ifa == ifa) {
4909                         return;
4910                 }
4911         }
4912
4913         /* add to the list */
4914         (void)sctp_insert_laddr(list, ifa, 0);
4915         return;
4916 }
4917
4918 /*
4919  * insert an laddr entry with the given ifa for the desired list
4920  */
4921 int
4922 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
4923 {
4924         struct sctp_laddr *laddr;
4925
4926         laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
4927         if (laddr == NULL) {
4928                 /* out of memory? */
4929                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4930                 return (EINVAL);
4931         }
4932         SCTP_INCR_LADDR_COUNT();
4933         bzero(laddr, sizeof(*laddr));
4934         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
4935         laddr->ifa = ifa;
4936         laddr->action = act;
4937         atomic_add_int(&ifa->refcount, 1);
4938         /* insert it */
4939         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
4940
4941         return (0);
4942 }
4943
4944 /*
4945  * Remove an laddr entry from the local address list (on an assoc)
4946  */
4947 void
4948 sctp_remove_laddr(struct sctp_laddr *laddr)
4949 {
4950
4951         /* remove from the list */
4952         LIST_REMOVE(laddr, sctp_nxt_addr);
4953         sctp_free_ifa(laddr->ifa);
4954         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
4955         SCTP_DECR_LADDR_COUNT();
4956 }
4957
4958 /*
4959  * Remove a local address from the TCB local address restricted list
4960  */
4961 void
4962 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
4963 {
4964         struct sctp_inpcb *inp;
4965         struct sctp_laddr *laddr;
4966
4967         /*
4968          * This is called by asconf work. It is assumed that a) The TCB is
4969          * locked and b) The INP is locked. This is true in as much as I can
4970          * trace through the entry asconf code where I did these locks.
4971          * Again, the ASCONF code is a bit different in that it does lock
4972          * the INP during its work often times. This must be since we don't
4973          * want other proc's looking up things while what they are looking
4974          * up is changing :-D
4975          */
4976
4977         inp = stcb->sctp_ep;
4978         /* if subset bound and don't allow ASCONF's, can't delete last */
4979         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
4980             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
4981                 if (stcb->sctp_ep->laddr_count < 2) {
4982                         /* can't delete last address */
4983                         return;
4984                 }
4985         }
4986         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
4987                 /* remove the address if it exists */
4988                 if (laddr->ifa == NULL)
4989                         continue;
4990                 if (laddr->ifa == ifa) {
4991                         sctp_remove_laddr(laddr);
4992                         return;
4993                 }
4994         }
4995
4996         /* address not found! */
4997         return;
4998 }
4999
5000 static char sctp_pcb_initialized = 0;
5001
5002 /*
5003  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5004  */
5005 /* sysctl */
5006 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5007 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5008
5009 void
5010 sctp_pcb_init()
5011 {
5012         /*
5013          * SCTP initialization for the PCB structures should be called by
5014          * the sctp_init() funciton.
5015          */
5016         int i;
5017         struct timeval tv;
5018
5019         if (sctp_pcb_initialized != 0) {
5020                 /* error I was called twice */
5021                 return;
5022         }
5023         sctp_pcb_initialized = 1;
5024
5025         bzero(&sctpstat, sizeof(struct sctpstat));
5026 #if defined(SCTP_LOCAL_TRACE_BUF)
5027         bzero(&sctp_log, sizeof(struct sctp_log));
5028 #endif
5029         (void)SCTP_GETTIME_TIMEVAL(&tv);
5030         sctpstat.sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5031         sctpstat.sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5032         /* init the empty list of (All) Endpoints */
5033         LIST_INIT(&sctppcbinfo.listhead);
5034
5035         /* init the iterator head */
5036         TAILQ_INIT(&sctppcbinfo.iteratorhead);
5037
5038         /* init the hash table of endpoints */
5039         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &sctp_hashtblsize);
5040         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize);
5041         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale);
5042         sctppcbinfo.sctp_asochash = SCTP_HASH_INIT((sctp_hashtblsize * 31),
5043             &sctppcbinfo.hashasocmark);
5044         sctppcbinfo.sctp_ephash = SCTP_HASH_INIT(sctp_hashtblsize,
5045             &sctppcbinfo.hashmark);
5046         sctppcbinfo.sctp_tcpephash = SCTP_HASH_INIT(sctp_hashtblsize,
5047             &sctppcbinfo.hashtcpmark);
5048         sctppcbinfo.hashtblsize = sctp_hashtblsize;
5049
5050         /* init the small hash table we use to track restarted asoc's */
5051         sctppcbinfo.sctp_restarthash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE,
5052             &sctppcbinfo.hashrestartmark);
5053
5054
5055         sctppcbinfo.sctp_vrfhash = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5056             &sctppcbinfo.hashvrfmark);
5057
5058         sctppcbinfo.vrf_ifn_hash = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5059             &sctppcbinfo.vrf_ifn_hashmark);
5060
5061         /* init the zones */
5062         /*
5063          * FIX ME: Should check for NULL returns, but if it does fail we are
5064          * doomed to panic anyways... add later maybe.
5065          */
5066         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_ep, "sctp_ep",
5067             sizeof(struct sctp_inpcb), maxsockets);
5068
5069         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc",
5070             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5071
5072         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr",
5073             sizeof(struct sctp_laddr),
5074             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5075
5076         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr",
5077             sizeof(struct sctp_nets),
5078             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5079
5080         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk",
5081             sizeof(struct sctp_tmit_chunk),
5082             (sctp_max_number_of_assoc * sctp_chunkscale));
5083
5084         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_readq, "sctp_readq",
5085             sizeof(struct sctp_queued_to_read),
5086             (sctp_max_number_of_assoc * sctp_chunkscale));
5087
5088         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_strmoq, "sctp_stream_msg_out",
5089             sizeof(struct sctp_stream_queue_pending),
5090             (sctp_max_number_of_assoc * sctp_chunkscale));
5091
5092         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asconf_ack, "sctp_asconf_ack",
5093             sizeof(struct sctp_asconf_ack),
5094             (sctp_max_number_of_assoc * sctp_chunkscale));
5095
5096
5097         /* Master Lock INIT for info structure */
5098         SCTP_INP_INFO_LOCK_INIT();
5099         SCTP_STATLOG_INIT_LOCK();
5100         SCTP_ITERATOR_LOCK_INIT();
5101
5102         SCTP_IPI_COUNT_INIT();
5103         SCTP_IPI_ADDR_INIT();
5104         SCTP_IPI_ITERATOR_WQ_INIT();
5105 #ifdef SCTP_PACKET_LOGGING
5106         SCTP_IP_PKTLOG_INIT();
5107 #endif
5108         LIST_INIT(&sctppcbinfo.addr_wq);
5109
5110         /* not sure if we need all the counts */
5111         sctppcbinfo.ipi_count_ep = 0;
5112         /* assoc/tcb zone info */
5113         sctppcbinfo.ipi_count_asoc = 0;
5114         /* local addrlist zone info */
5115         sctppcbinfo.ipi_count_laddr = 0;
5116         /* remote addrlist zone info */
5117         sctppcbinfo.ipi_count_raddr = 0;
5118         /* chunk info */
5119         sctppcbinfo.ipi_count_chunk = 0;
5120
5121         /* socket queue zone info */
5122         sctppcbinfo.ipi_count_readq = 0;
5123
5124         /* stream out queue cont */
5125         sctppcbinfo.ipi_count_strmoq = 0;
5126
5127         sctppcbinfo.ipi_free_strmoq = 0;
5128         sctppcbinfo.ipi_free_chunks = 0;
5129
5130         SCTP_OS_TIMER_INIT(&sctppcbinfo.addr_wq_timer.timer);
5131
5132         /* Init the TIMEWAIT list */
5133         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE_A; i++) {
5134                 LIST_INIT(&sctppcbinfo.vtag_timewait[i]);
5135         }
5136
5137 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
5138         sctppcbinfo.iterator_running = 0;
5139         sctp_startup_iterator();
5140 #endif
5141
5142         /*
5143          * INIT the default VRF which for BSD is the only one, other O/S's
5144          * may have more. But initially they must start with one and then
5145          * add the VRF's as addresses are added.
5146          */
5147         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5148
5149 }
5150
5151
5152 int
5153 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5154     int iphlen, int offset, int limit, struct sctphdr *sh,
5155     struct sockaddr *altsa)
5156 {
5157         /*
5158          * grub through the INIT pulling addresses and loading them to the
5159          * nets structure in the asoc. The from address in the mbuf should
5160          * also be loaded (if it is not already). This routine can be called
5161          * with either INIT or INIT-ACK's as long as the m points to the IP
5162          * packet and the offset points to the beginning of the parameters.
5163          */
5164         struct sctp_inpcb *inp, *l_inp;
5165         struct sctp_nets *net, *net_tmp;
5166         struct ip *iph;
5167         struct sctp_paramhdr *phdr, parm_buf;
5168         struct sctp_tcb *stcb_tmp;
5169         uint16_t ptype, plen;
5170         struct sockaddr *sa;
5171         struct sockaddr_storage dest_store;
5172         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
5173         struct sockaddr_in sin;
5174         struct sockaddr_in6 sin6;
5175         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
5176         struct sctp_auth_random *p_random = NULL;
5177         uint16_t random_len = 0;
5178         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
5179         struct sctp_auth_hmac_algo *hmacs = NULL;
5180         uint16_t hmacs_len = 0;
5181         uint8_t saw_asconf = 0;
5182         uint8_t saw_asconf_ack = 0;
5183         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
5184         struct sctp_auth_chunk_list *chunks = NULL;
5185         uint16_t num_chunks = 0;
5186         sctp_key_t *new_key;
5187         uint32_t keylen;
5188         int got_random = 0, got_hmacs = 0, got_chklist = 0;
5189
5190         /* First get the destination address setup too. */
5191         memset(&sin, 0, sizeof(sin));
5192         memset(&sin6, 0, sizeof(sin6));
5193
5194         sin.sin_family = AF_INET;
5195         sin.sin_len = sizeof(sin);
5196         sin.sin_port = stcb->rport;
5197
5198         sin6.sin6_family = AF_INET6;
5199         sin6.sin6_len = sizeof(struct sockaddr_in6);
5200         sin6.sin6_port = stcb->rport;
5201         if (altsa == NULL) {
5202                 iph = mtod(m, struct ip *);
5203                 if (iph->ip_v == IPVERSION) {
5204                         /* its IPv4 */
5205                         struct sockaddr_in *sin_2;
5206
5207                         sin_2 = (struct sockaddr_in *)(local_sa);
5208                         memset(sin_2, 0, sizeof(sin));
5209                         sin_2->sin_family = AF_INET;
5210                         sin_2->sin_len = sizeof(sin);
5211                         sin_2->sin_port = sh->dest_port;
5212                         sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
5213                         sin.sin_addr = iph->ip_src;
5214                         sa = (struct sockaddr *)&sin;
5215                 } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
5216                         /* its IPv6 */
5217                         struct ip6_hdr *ip6;
5218                         struct sockaddr_in6 *sin6_2;
5219
5220                         ip6 = mtod(m, struct ip6_hdr *);
5221                         sin6_2 = (struct sockaddr_in6 *)(local_sa);
5222                         memset(sin6_2, 0, sizeof(sin6));
5223                         sin6_2->sin6_family = AF_INET6;
5224                         sin6_2->sin6_len = sizeof(struct sockaddr_in6);
5225                         sin6_2->sin6_port = sh->dest_port;
5226                         sin6.sin6_addr = ip6->ip6_src;
5227                         sa = (struct sockaddr *)&sin6;
5228                 } else {
5229                         sa = NULL;
5230                 }
5231         } else {
5232                 /*
5233                  * For cookies we use the src address NOT from the packet
5234                  * but from the original INIT
5235                  */
5236                 sa = altsa;
5237         }
5238         /* Turn off ECN until we get through all params */
5239         stcb->asoc.ecn_allowed = 0;
5240         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5241                 /* mark all addresses that we have currently on the list */
5242                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
5243         }
5244         /* does the source address already exist? if so skip it */
5245         l_inp = inp = stcb->sctp_ep;
5246
5247         atomic_add_int(&stcb->asoc.refcnt, 1);
5248         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
5249         atomic_add_int(&stcb->asoc.refcnt, -1);
5250
5251         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
5252                 /* we must add the source address */
5253                 /* no scope set here since we have a tcb already. */
5254                 if ((sa->sa_family == AF_INET) &&
5255                     (stcb->asoc.ipv4_addr_legal)) {
5256                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
5257                                 return (-1);
5258                         }
5259                 } else if ((sa->sa_family == AF_INET6) &&
5260                     (stcb->asoc.ipv6_addr_legal)) {
5261                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
5262                                 return (-2);
5263                         }
5264                 }
5265         } else {
5266                 if (net_tmp != NULL && stcb_tmp == stcb) {
5267                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
5268                 } else if (stcb_tmp != stcb) {
5269                         /* It belongs to another association? */
5270                         if (stcb_tmp)
5271                                 SCTP_TCB_UNLOCK(stcb_tmp);
5272                         return (-3);
5273                 }
5274         }
5275         if (stcb->asoc.state == 0) {
5276                 /* the assoc was freed? */
5277                 return (-4);
5278         }
5279         /*
5280          * peer must explicitly turn this on. This may have been initialized
5281          * to be "on" in order to allow local addr changes while INIT's are
5282          * in flight.
5283          */
5284         stcb->asoc.peer_supports_asconf = 0;
5285         /* now we must go through each of the params. */
5286         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
5287         while (phdr) {
5288                 ptype = ntohs(phdr->param_type);
5289                 plen = ntohs(phdr->param_length);
5290                 /*
5291                  * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
5292                  * (int)plen);
5293                  */
5294                 if (offset + plen > limit) {
5295                         break;
5296                 }
5297                 if (plen == 0) {
5298                         break;
5299                 }
5300                 if (ptype == SCTP_IPV4_ADDRESS) {
5301                         if (stcb->asoc.ipv4_addr_legal) {
5302                                 struct sctp_ipv4addr_param *p4, p4_buf;
5303
5304                                 /* ok get the v4 address and check/add */
5305                                 phdr = sctp_get_next_param(m, offset,
5306                                     (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5307                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5308                                     phdr == NULL) {
5309                                         return (-5);
5310                                 }
5311                                 p4 = (struct sctp_ipv4addr_param *)phdr;
5312                                 sin.sin_addr.s_addr = p4->addr;
5313                                 if (IN_MULTICAST(sin.sin_addr.s_addr)) {
5314                                         /* Skip multi-cast addresses */
5315                                         goto next_param;
5316                                 }
5317                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
5318                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
5319                                         goto next_param;
5320                                 }
5321                                 sa = (struct sockaddr *)&sin;
5322                                 inp = stcb->sctp_ep;
5323                                 atomic_add_int(&stcb->asoc.refcnt, 1);
5324                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
5325                                     local_sa, stcb);
5326                                 atomic_add_int(&stcb->asoc.refcnt, -1);
5327
5328                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
5329                                     inp == NULL) {
5330                                         /* we must add the source address */
5331                                         /*
5332                                          * no scope set since we have a tcb
5333                                          * already
5334                                          */
5335
5336                                         /*
5337                                          * we must validate the state again
5338                                          * here
5339                                          */
5340                                         if (stcb->asoc.state == 0) {
5341                                                 /* the assoc was freed? */
5342                                                 return (-7);
5343                                         }
5344                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
5345                                                 return (-8);
5346                                         }
5347                                 } else if (stcb_tmp == stcb) {
5348                                         if (stcb->asoc.state == 0) {
5349                                                 /* the assoc was freed? */
5350                                                 return (-10);
5351                                         }
5352                                         if (net != NULL) {
5353                                                 /* clear flag */
5354                                                 net->dest_state &=
5355                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
5356                                         }
5357                                 } else {
5358                                         /*
5359                                          * strange, address is in another
5360                                          * assoc? straighten out locks.
5361                                          */
5362                                         if (stcb_tmp)
5363                                                 SCTP_TCB_UNLOCK(stcb_tmp);
5364
5365                                         if (stcb->asoc.state == 0) {
5366                                                 /* the assoc was freed? */
5367                                                 return (-12);
5368                                         }
5369                                         return (-13);
5370                                 }
5371                         }
5372                 } else if (ptype == SCTP_IPV6_ADDRESS) {
5373                         if (stcb->asoc.ipv6_addr_legal) {
5374                                 /* ok get the v6 address and check/add */
5375                                 struct sctp_ipv6addr_param *p6, p6_buf;
5376
5377                                 phdr = sctp_get_next_param(m, offset,
5378                                     (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5379                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5380                                     phdr == NULL) {
5381                                         return (-14);
5382                                 }
5383                                 p6 = (struct sctp_ipv6addr_param *)phdr;
5384                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5385                                     sizeof(p6->addr));
5386                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
5387                                         /* Skip multi-cast addresses */
5388                                         goto next_param;
5389                                 }
5390                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
5391                                         /*
5392                                          * Link local make no sense without
5393                                          * scope
5394                                          */
5395                                         goto next_param;
5396                                 }
5397                                 sa = (struct sockaddr *)&sin6;
5398                                 inp = stcb->sctp_ep;
5399                                 atomic_add_int(&stcb->asoc.refcnt, 1);
5400                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
5401                                     local_sa, stcb);
5402                                 atomic_add_int(&stcb->asoc.refcnt, -1);
5403                                 if (stcb_tmp == NULL && (inp == stcb->sctp_ep ||
5404                                     inp == NULL)) {
5405                                         /*
5406                                          * we must validate the state again
5407                                          * here
5408                                          */
5409                                         if (stcb->asoc.state == 0) {
5410                                                 /* the assoc was freed? */
5411                                                 return (-16);
5412                                         }
5413                                         /*
5414                                          * we must add the address, no scope
5415                                          * set
5416                                          */
5417                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
5418                                                 return (-17);
5419                                         }
5420                                 } else if (stcb_tmp == stcb) {
5421                                         /*
5422                                          * we must validate the state again
5423                                          * here
5424                                          */
5425                                         if (stcb->asoc.state == 0) {
5426                                                 /* the assoc was freed? */
5427                                                 return (-19);
5428                                         }
5429                                         if (net != NULL) {
5430                                                 /* clear flag */
5431                                                 net->dest_state &=
5432                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
5433                                         }
5434                                 } else {
5435                                         /*
5436                                          * strange, address is in another
5437                                          * assoc? straighten out locks.
5438                                          */
5439                                         if (stcb_tmp)
5440                                                 SCTP_TCB_UNLOCK(stcb_tmp);
5441
5442                                         if (stcb->asoc.state == 0) {
5443                                                 /* the assoc was freed? */
5444                                                 return (-21);
5445                                         }
5446                                         return (-22);
5447                                 }
5448                         }
5449                 } else if (ptype == SCTP_ECN_CAPABLE) {
5450                         stcb->asoc.ecn_allowed = 1;
5451                 } else if (ptype == SCTP_ULP_ADAPTATION) {
5452                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
5453                                 struct sctp_adaptation_layer_indication ai,
5454                                                                 *aip;
5455
5456                                 phdr = sctp_get_next_param(m, offset,
5457                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
5458                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
5459                                 if (aip) {
5460                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
5461                                         stcb->asoc.adaptation_needed = 1;
5462                                 }
5463                         }
5464                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
5465                         struct sctp_asconf_addr_param lstore, *fee;
5466                         struct sctp_asconf_addrv4_param *fii;
5467                         int lptype;
5468                         struct sockaddr *lsa = NULL;
5469
5470                         stcb->asoc.peer_supports_asconf = 1;
5471                         if (plen > sizeof(lstore)) {
5472                                 return (-23);
5473                         }
5474                         phdr = sctp_get_next_param(m, offset,
5475                             (struct sctp_paramhdr *)&lstore, min(plen, sizeof(lstore)));
5476                         if (phdr == NULL) {
5477                                 return (-24);
5478                         }
5479                         fee = (struct sctp_asconf_addr_param *)phdr;
5480                         lptype = ntohs(fee->addrp.ph.param_type);
5481                         if (lptype == SCTP_IPV4_ADDRESS) {
5482                                 if (plen !=
5483                                     sizeof(struct sctp_asconf_addrv4_param)) {
5484                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
5485                                             (int)sizeof(struct sctp_asconf_addrv4_param),
5486                                             plen);
5487                                 } else {
5488                                         fii = (struct sctp_asconf_addrv4_param *)fee;
5489                                         sin.sin_addr.s_addr = fii->addrp.addr;
5490                                         lsa = (struct sockaddr *)&sin;
5491                                 }
5492                         } else if (lptype == SCTP_IPV6_ADDRESS) {
5493                                 if (plen !=
5494                                     sizeof(struct sctp_asconf_addr_param)) {
5495                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
5496                                             (int)sizeof(struct sctp_asconf_addr_param),
5497                                             plen);
5498                                 } else {
5499                                         memcpy(sin6.sin6_addr.s6_addr,
5500                                             fee->addrp.addr,
5501                                             sizeof(fee->addrp.addr));
5502                                         lsa = (struct sockaddr *)&sin6;
5503                                 }
5504                         }
5505                         if (lsa) {
5506                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
5507                         }
5508                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
5509                         /* Peer supports pr-sctp */
5510                         stcb->asoc.peer_supports_prsctp = 1;
5511                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
5512                         /* A supported extension chunk */
5513                         struct sctp_supported_chunk_types_param *pr_supported;
5514                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
5515                         int num_ent, i;
5516
5517                         phdr = sctp_get_next_param(m, offset,
5518                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
5519                         if (phdr == NULL) {
5520                                 return (-25);
5521                         }
5522                         stcb->asoc.peer_supports_asconf = 0;
5523                         stcb->asoc.peer_supports_prsctp = 0;
5524                         stcb->asoc.peer_supports_pktdrop = 0;
5525                         stcb->asoc.peer_supports_strreset = 0;
5526                         stcb->asoc.peer_supports_auth = 0;
5527                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
5528                         num_ent = plen - sizeof(struct sctp_paramhdr);
5529                         for (i = 0; i < num_ent; i++) {
5530                                 switch (pr_supported->chunk_types[i]) {
5531                                 case SCTP_ASCONF:
5532                                 case SCTP_ASCONF_ACK:
5533                                         stcb->asoc.peer_supports_asconf = 1;
5534                                         break;
5535                                 case SCTP_FORWARD_CUM_TSN:
5536                                         stcb->asoc.peer_supports_prsctp = 1;
5537                                         break;
5538                                 case SCTP_PACKET_DROPPED:
5539                                         stcb->asoc.peer_supports_pktdrop = 1;
5540                                         break;
5541                                 case SCTP_STREAM_RESET:
5542                                         stcb->asoc.peer_supports_strreset = 1;
5543                                         break;
5544                                 case SCTP_AUTHENTICATION:
5545                                         stcb->asoc.peer_supports_auth = 1;
5546                                         break;
5547                                 default:
5548                                         /* one I have not learned yet */
5549                                         break;
5550
5551                                 }
5552                         }
5553                 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
5554                         /* Peer supports ECN-nonce */
5555                         stcb->asoc.peer_supports_ecn_nonce = 1;
5556                         stcb->asoc.ecn_nonce_allowed = 1;
5557                 } else if (ptype == SCTP_RANDOM) {
5558                         if (plen > sizeof(random_store))
5559                                 break;
5560                         if (got_random) {
5561                                 /* already processed a RANDOM */
5562                                 goto next_param;
5563                         }
5564                         phdr = sctp_get_next_param(m, offset,
5565                             (struct sctp_paramhdr *)random_store,
5566                             min(sizeof(random_store), plen));
5567                         if (phdr == NULL)
5568                                 return (-26);
5569                         p_random = (struct sctp_auth_random *)phdr;
5570                         random_len = plen - sizeof(*p_random);
5571                         /* enforce the random length */
5572                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
5573                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
5574                                 return (-27);
5575                         }
5576                         got_random = 1;
5577                 } else if (ptype == SCTP_HMAC_LIST) {
5578                         int num_hmacs;
5579                         int i;
5580
5581                         if (plen > sizeof(hmacs_store))
5582                                 break;
5583                         if (got_hmacs) {
5584                                 /* already processed a HMAC list */
5585                                 goto next_param;
5586                         }
5587                         phdr = sctp_get_next_param(m, offset,
5588                             (struct sctp_paramhdr *)hmacs_store,
5589                             min(plen, sizeof(hmacs_store)));
5590                         if (phdr == NULL)
5591                                 return (-28);
5592                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
5593                         hmacs_len = plen - sizeof(*hmacs);
5594                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
5595                         /* validate the hmac list */
5596                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
5597                                 return (-29);
5598                         }
5599                         if (stcb->asoc.peer_hmacs != NULL)
5600                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
5601                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
5602                         if (stcb->asoc.peer_hmacs != NULL) {
5603                                 for (i = 0; i < num_hmacs; i++) {
5604                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
5605                                             ntohs(hmacs->hmac_ids[i]));
5606                                 }
5607                         }
5608                         got_hmacs = 1;
5609                 } else if (ptype == SCTP_CHUNK_LIST) {
5610                         int i;
5611
5612                         if (plen > sizeof(chunks_store))
5613                                 break;
5614                         if (got_chklist) {
5615                                 /* already processed a Chunks list */
5616                                 goto next_param;
5617                         }
5618                         phdr = sctp_get_next_param(m, offset,
5619                             (struct sctp_paramhdr *)chunks_store,
5620                             min(plen, sizeof(chunks_store)));
5621                         if (phdr == NULL)
5622                                 return (-30);
5623                         chunks = (struct sctp_auth_chunk_list *)phdr;
5624                         num_chunks = plen - sizeof(*chunks);
5625                         if (stcb->asoc.peer_auth_chunks != NULL)
5626                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
5627                         else
5628                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
5629                         for (i = 0; i < num_chunks; i++) {
5630                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
5631                                     stcb->asoc.peer_auth_chunks);
5632                                 /* record asconf/asconf-ack if listed */
5633                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
5634                                         saw_asconf = 1;
5635                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
5636                                         saw_asconf_ack = 1;
5637
5638                         }
5639                         got_chklist = 1;
5640                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
5641                             (ptype == SCTP_STATE_COOKIE) ||
5642                             (ptype == SCTP_UNRECOG_PARAM) ||
5643                             (ptype == SCTP_COOKIE_PRESERVE) ||
5644                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
5645                             (ptype == SCTP_ADD_IP_ADDRESS) ||
5646                             (ptype == SCTP_DEL_IP_ADDRESS) ||
5647                             (ptype == SCTP_ERROR_CAUSE_IND) ||
5648                     (ptype == SCTP_SUCCESS_REPORT)) {
5649                          /* don't care */ ;
5650                 } else {
5651                         if ((ptype & 0x8000) == 0x0000) {
5652                                 /*
5653                                  * must stop processing the rest of the
5654                                  * param's. Any report bits were handled
5655                                  * with the call to
5656                                  * sctp_arethere_unrecognized_parameters()
5657                                  * when the INIT or INIT-ACK was first seen.
5658                                  */
5659                                 break;
5660                         }
5661                 }
5662 next_param:
5663                 offset += SCTP_SIZE32(plen);
5664                 if (offset >= limit) {
5665                         break;
5666                 }
5667                 phdr = sctp_get_next_param(m, offset, &parm_buf,
5668                     sizeof(parm_buf));
5669         }
5670         /* Now check to see if we need to purge any addresses */
5671         for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
5672                 net_tmp = TAILQ_NEXT(net, sctp_next);
5673                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
5674                     SCTP_ADDR_NOT_IN_ASSOC) {
5675                         /* This address has been removed from the asoc */
5676                         /* remove and free it */
5677                         stcb->asoc.numnets--;
5678                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
5679                         sctp_free_remote_addr(net);
5680                         if (net == stcb->asoc.primary_destination) {
5681                                 stcb->asoc.primary_destination = NULL;
5682                                 sctp_select_primary_destination(stcb);
5683                         }
5684                 }
5685         }
5686         /* validate authentication required parameters */
5687         if (got_random && got_hmacs) {
5688                 stcb->asoc.peer_supports_auth = 1;
5689         } else {
5690                 stcb->asoc.peer_supports_auth = 0;
5691         }
5692         if (!stcb->asoc.peer_supports_auth && got_chklist) {
5693                 /* peer does not support auth but sent a chunks list? */
5694                 return (-31);
5695         }
5696         if (!sctp_asconf_auth_nochk && stcb->asoc.peer_supports_asconf &&
5697             !stcb->asoc.peer_supports_auth) {
5698                 /* peer supports asconf but not auth? */
5699                 return (-32);
5700         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
5701             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
5702                 return (-33);
5703         }
5704         /* concatenate the full random key */
5705 #ifdef SCTP_AUTH_DRAFT_04
5706         keylen = random_len;
5707         new_key = sctp_alloc_key(keylen);
5708         if (new_key != NULL) {
5709                 /* copy in the RANDOM */
5710                 if (p_random != NULL)
5711                         bcopy(p_random->random_data, new_key->key, random_len);
5712         }
5713 #else
5714         keylen = sizeof(*p_random) + random_len + sizeof(*chunks) + num_chunks +
5715             sizeof(*hmacs) + hmacs_len;
5716         new_key = sctp_alloc_key(keylen);
5717         if (new_key != NULL) {
5718                 /* copy in the RANDOM */
5719                 if (p_random != NULL) {
5720                         keylen = sizeof(*p_random) + random_len;
5721                         bcopy(p_random, new_key->key, keylen);
5722                 }
5723                 /* append in the AUTH chunks */
5724                 if (chunks != NULL) {
5725                         bcopy(chunks, new_key->key + keylen,
5726                             sizeof(*chunks) + num_chunks);
5727                         keylen += sizeof(*chunks) + num_chunks;
5728                 }
5729                 /* append in the HMACs */
5730                 if (hmacs != NULL) {
5731                         bcopy(hmacs, new_key->key + keylen,
5732                             sizeof(*hmacs) + hmacs_len);
5733                 }
5734         }
5735 #endif
5736         else {
5737                 /* failed to get memory for the key */
5738                 return (-34);
5739         }
5740         if (stcb->asoc.authinfo.peer_random != NULL)
5741                 sctp_free_key(stcb->asoc.authinfo.peer_random);
5742         stcb->asoc.authinfo.peer_random = new_key;
5743 #ifdef SCTP_AUTH_DRAFT_04
5744         /* don't include the chunks and hmacs for draft -04 */
5745         stcb->asoc.authinfo.peer_random->keylen = random_len;
5746 #endif
5747         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
5748         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
5749
5750         return (0);
5751 }
5752
5753 int
5754 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
5755     struct sctp_nets *net)
5756 {
5757         /* make sure the requested primary address exists in the assoc */
5758         if (net == NULL && sa)
5759                 net = sctp_findnet(stcb, sa);
5760
5761         if (net == NULL) {
5762                 /* didn't find the requested primary address! */
5763                 return (-1);
5764         } else {
5765                 /* set the primary address */
5766                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
5767                         /* Must be confirmed, so queue to set */
5768                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
5769                         return (0);
5770                 }
5771                 stcb->asoc.primary_destination = net;
5772                 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
5773                 net = TAILQ_FIRST(&stcb->asoc.nets);
5774                 if (net != stcb->asoc.primary_destination) {
5775                         /*
5776                          * first one on the list is NOT the primary
5777                          * sctp_cmpaddr() is much more efficent if the
5778                          * primary is the first on the list, make it so.
5779                          */
5780                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
5781                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
5782                 }
5783                 return (0);
5784         }
5785 }
5786
5787 int
5788 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, struct timeval *now, int save_in_twait)
5789 {
5790         /*
5791          * This function serves two purposes. It will see if a TAG can be
5792          * re-used and return 1 for yes it is ok and 0 for don't use that
5793          * tag. A secondary function it will do is purge out old tags that
5794          * can be removed.
5795          */
5796         struct sctpasochead *head;
5797         struct sctpvtaghead *chain;
5798         struct sctp_tagblock *twait_block;
5799         struct sctp_tcb *stcb;
5800         int i;
5801
5802         SCTP_INP_INFO_WLOCK();
5803         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
5804         /* First is the vtag in use ? */
5805
5806         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag,
5807             sctppcbinfo.hashasocmark)];
5808         if (head == NULL) {
5809                 goto check_restart;
5810         }
5811         LIST_FOREACH(stcb, head, sctp_asocs) {
5812
5813                 if (stcb->asoc.my_vtag == tag) {
5814                         /*
5815                          * We should remove this if and return 0 always if
5816                          * we want vtags unique across all endpoints. For
5817                          * now within a endpoint is ok.
5818                          */
5819                         if (inp == stcb->sctp_ep) {
5820                                 /* bad tag, in use */
5821                                 SCTP_INP_INFO_WUNLOCK();
5822                                 return (0);
5823                         }
5824                 }
5825         }
5826 check_restart:
5827         /* Now lets check the restart hash */
5828         head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(tag,
5829             sctppcbinfo.hashrestartmark)];
5830         if (head == NULL) {
5831                 goto check_time_wait;
5832         }
5833         LIST_FOREACH(stcb, head, sctp_tcbrestarhash) {
5834                 if (stcb->asoc.assoc_id == tag) {
5835                         /* candidate */
5836                         if (inp == stcb->sctp_ep) {
5837                                 /* bad tag, in use */
5838                                 SCTP_INP_INFO_WUNLOCK();
5839                                 return (0);
5840                         }
5841                 }
5842         }
5843 check_time_wait:
5844         /* Now what about timed wait ? */
5845         if (!SCTP_LIST_EMPTY(chain)) {
5846                 /*
5847                  * Block(s) are present, lets see if we have this tag in the
5848                  * list
5849                  */
5850                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5851                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
5852                                 if (twait_block->vtag_block[i].v_tag == 0) {
5853                                         /* not used */
5854                                         continue;
5855                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
5856                                     now->tv_sec) {
5857                                         /* Audit expires this guy */
5858                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
5859                                         twait_block->vtag_block[i].v_tag = 0;
5860                                 } else if (twait_block->vtag_block[i].v_tag ==
5861                                     tag) {
5862                                         /* Bad tag, sorry :< */
5863                                         SCTP_INP_INFO_WUNLOCK();
5864                                         return (0);
5865                                 }
5866                         }
5867                 }
5868         }
5869         /*-
5870          * Not found, ok to use the tag, add it to the time wait hash
5871          * as well this will prevent two sucessive cookies from getting
5872          * the same tag or two inits sent quickly on multi-processors.
5873          * We only keep the tag for the life of a cookie and when we
5874          * add this tag to the assoc hash we need to purge it from
5875          * the t-wait hash.
5876          */
5877         if (save_in_twait)
5878                 sctp_add_vtag_to_timewait(tag, TICKS_TO_SEC(inp->sctp_ep.def_cookie_life));
5879         SCTP_INP_INFO_WUNLOCK();
5880         return (1);
5881 }
5882
5883
5884 static sctp_assoc_t reneged_asoc_ids[256];
5885 static uint8_t reneged_at = 0;
5886
5887
5888 static void
5889 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
5890 {
5891         /*
5892          * We must hunt this association for MBUF's past the cumack (i.e.
5893          * out of order data that we can renege on).
5894          */
5895         struct sctp_association *asoc;
5896         struct sctp_tmit_chunk *chk, *nchk;
5897         uint32_t cumulative_tsn_p1, tsn;
5898         struct sctp_queued_to_read *ctl, *nctl;
5899         int cnt, strmat, gap;
5900
5901         /* We look for anything larger than the cum-ack + 1 */
5902
5903         SCTP_STAT_INCR(sctps_protocol_drain_calls);
5904         if (sctp_do_drain == 0) {
5905                 return;
5906         }
5907         asoc = &stcb->asoc;
5908         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
5909                 /* none we can reneg on. */
5910                 return;
5911         }
5912         SCTP_STAT_INCR(sctps_protocol_drains_done);
5913         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
5914         cnt = 0;
5915         /* First look in the re-assembly queue */
5916         chk = TAILQ_FIRST(&asoc->reasmqueue);
5917         while (chk) {
5918                 /* Get the next one */
5919                 nchk = TAILQ_NEXT(chk, sctp_next);
5920                 if (compare_with_wrap(chk->rec.data.TSN_seq,
5921                     cumulative_tsn_p1, MAX_TSN)) {
5922                         /* Yep it is above cum-ack */
5923                         cnt++;
5924                         tsn = chk->rec.data.TSN_seq;
5925                         if (tsn >= asoc->mapping_array_base_tsn) {
5926                                 gap = tsn - asoc->mapping_array_base_tsn;
5927                         } else {
5928                                 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
5929                                     tsn + 1;
5930                         }
5931                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
5932                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
5933                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
5934                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5935                         if (chk->data) {
5936                                 sctp_m_freem(chk->data);
5937                                 chk->data = NULL;
5938                         }
5939                         sctp_free_a_chunk(stcb, chk);
5940                 }
5941                 chk = nchk;
5942         }
5943         /* Ok that was fun, now we will drain all the inbound streams? */
5944         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
5945                 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
5946                 while (ctl) {
5947                         nctl = TAILQ_NEXT(ctl, next);
5948                         if (compare_with_wrap(ctl->sinfo_tsn,
5949                             cumulative_tsn_p1, MAX_TSN)) {
5950                                 /* Yep it is above cum-ack */
5951                                 cnt++;
5952                                 tsn = ctl->sinfo_tsn;
5953                                 if (tsn >= asoc->mapping_array_base_tsn) {
5954                                         gap = tsn -
5955                                             asoc->mapping_array_base_tsn;
5956                                 } else {
5957                                         gap = (MAX_TSN -
5958                                             asoc->mapping_array_base_tsn) +
5959                                             tsn + 1;
5960                                 }
5961                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
5962                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
5963
5964                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array,
5965                                     gap);
5966                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue,
5967                                     ctl, next);
5968                                 if (ctl->data) {
5969                                         sctp_m_freem(ctl->data);
5970                                         ctl->data = NULL;
5971                                 }
5972                                 sctp_free_remote_addr(ctl->whoFrom);
5973                                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl);
5974                                 SCTP_DECR_READQ_COUNT();
5975                         }
5976                         ctl = nctl;
5977                 }
5978         }
5979         /*
5980          * Question, should we go through the delivery queue? The only
5981          * reason things are on here is the app not reading OR a p-d-api up.
5982          * An attacker COULD send enough in to initiate the PD-API and then
5983          * send a bunch of stuff to other streams... these would wind up on
5984          * the delivery queue.. and then we would not get to them. But in
5985          * order to do this I then have to back-track and un-deliver
5986          * sequence numbers in streams.. el-yucko. I think for now we will
5987          * NOT look at the delivery queue and leave it to be something to
5988          * consider later. An alternative would be to abort the P-D-API with
5989          * a notification and then deliver the data.... Or another method
5990          * might be to keep track of how many times the situation occurs and
5991          * if we see a possible attack underway just abort the association.
5992          */
5993 #ifdef SCTP_DEBUG
5994         if (cnt) {
5995                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
5996         }
5997 #endif
5998         if (cnt) {
5999                 /*
6000                  * Now do we need to find a new
6001                  * asoc->highest_tsn_inside_map?
6002                  */
6003                 if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) {
6004                         gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn;
6005                 } else {
6006                         gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
6007                             asoc->highest_tsn_inside_map + 1;
6008                 }
6009                 if (gap >= (asoc->mapping_array_size << 3)) {
6010                         /*
6011                          * Something bad happened or cum-ack and high were
6012                          * behind the base, but if so earlier checks should
6013                          * have found NO data... wierd... we will start at
6014                          * end of mapping array.
6015                          */
6016                         SCTP_PRINTF("Gap was larger than array?? %d set to max:%d maparraymax:%x\n",
6017                             (int)gap,
6018                             (int)(asoc->mapping_array_size << 3),
6019                             (int)asoc->highest_tsn_inside_map);
6020                         gap = asoc->mapping_array_size << 3;
6021                 }
6022                 while (gap > 0) {
6023                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6024                                 /* found the new highest */
6025                                 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap;
6026                                 break;
6027                         }
6028                         gap--;
6029                 }
6030                 if (gap == 0) {
6031                         /* Nothing left in map */
6032                         memset(asoc->mapping_array, 0, asoc->mapping_array_size);
6033                         asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1;
6034                         asoc->highest_tsn_inside_map = asoc->cumulative_tsn;
6035                 }
6036                 asoc->last_revoke_count = cnt;
6037                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6038                 /* sa_ignore NO_NULL_CHK */
6039                 sctp_send_sack(stcb);
6040                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6041                 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
6042                 reneged_at++;
6043         }
6044         /*
6045          * Another issue, in un-setting the TSN's in the mapping array we
6046          * DID NOT adjust the higest_tsn marker.  This will cause one of two
6047          * things to occur. It may cause us to do extra work in checking for
6048          * our mapping array movement. More importantly it may cause us to
6049          * SACK every datagram. This may not be a bad thing though since we
6050          * will recover once we get our cum-ack above and all this stuff we
6051          * dumped recovered.
6052          */
6053 }
6054
6055 void
6056 sctp_drain()
6057 {
6058         /*
6059          * We must walk the PCB lists for ALL associations here. The system
6060          * is LOW on MBUF's and needs help. This is where reneging will
6061          * occur. We really hope this does NOT happen!
6062          */
6063         struct sctp_inpcb *inp;
6064         struct sctp_tcb *stcb;
6065
6066         SCTP_INP_INFO_RLOCK();
6067         LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
6068                 /* For each endpoint */
6069                 SCTP_INP_RLOCK(inp);
6070                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6071                         /* For each association */
6072                         SCTP_TCB_LOCK(stcb);
6073                         sctp_drain_mbufs(inp, stcb);
6074                         SCTP_TCB_UNLOCK(stcb);
6075                 }
6076                 SCTP_INP_RUNLOCK(inp);
6077         }
6078         SCTP_INP_INFO_RUNLOCK();
6079 }
6080
6081 /*
6082  * start a new iterator
6083  * iterates through all endpoints and associations based on the pcb_state
6084  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6085  * assocs and "ef" (optional) is executed when the iterator completes.
6086  * "inpf" (optional) is executed for each new endpoint as it is being
6087  * iterated through. inpe (optional) is called when the inp completes
6088  * its way through all the stcbs.
6089  */
6090 int
6091 sctp_initiate_iterator(inp_func inpf,
6092     asoc_func af,
6093     inp_func inpe,
6094     uint32_t pcb_state,
6095     uint32_t pcb_features,
6096     uint32_t asoc_state,
6097     void *argp,
6098     uint32_t argi,
6099     end_func ef,
6100     struct sctp_inpcb *s_inp,
6101     uint8_t chunk_output_off)
6102 {
6103         struct sctp_iterator *it = NULL;
6104
6105         if (af == NULL) {
6106                 return (-1);
6107         }
6108         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6109             SCTP_M_ITER);
6110         if (it == NULL) {
6111                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6112                 return (ENOMEM);
6113         }
6114         memset(it, 0, sizeof(*it));
6115         it->function_assoc = af;
6116         it->function_inp = inpf;
6117         if (inpf)
6118                 it->done_current_ep = 0;
6119         else
6120                 it->done_current_ep = 1;
6121         it->function_atend = ef;
6122         it->pointer = argp;
6123         it->val = argi;
6124         it->pcb_flags = pcb_state;
6125         it->pcb_features = pcb_features;
6126         it->asoc_state = asoc_state;
6127         it->function_inp_end = inpe;
6128         it->no_chunk_output = chunk_output_off;
6129         if (s_inp) {
6130                 it->inp = s_inp;
6131                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
6132         } else {
6133                 SCTP_INP_INFO_RLOCK();
6134                 it->inp = LIST_FIRST(&sctppcbinfo.listhead);
6135
6136                 SCTP_INP_INFO_RUNLOCK();
6137                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
6138
6139         }
6140         SCTP_IPI_ITERATOR_WQ_LOCK();
6141         if (it->inp) {
6142                 SCTP_INP_INCR_REF(it->inp);
6143         }
6144         TAILQ_INSERT_TAIL(&sctppcbinfo.iteratorhead, it, sctp_nxt_itr);
6145 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
6146         if (sctppcbinfo.iterator_running == 0) {
6147                 sctp_wakeup_iterator();
6148         }
6149         SCTP_IPI_ITERATOR_WQ_UNLOCK();
6150 #else
6151         if (it->inp)
6152                 SCTP_INP_DECR_REF(it->inp);
6153         SCTP_IPI_ITERATOR_WQ_UNLOCK();
6154         /* Init the timer */
6155         SCTP_OS_TIMER_INIT(&it->tmr.timer);
6156         /* add to the list of all iterators */
6157         sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it,
6158             NULL, NULL);
6159 #endif
6160         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
6161         return (0);
6162 }