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 transmute the ip
2433                                  * address to the proper value (i.e. the IP
2434                                  * address owned by the jail).
2435                                  */
2436                                 if (prison_ip(p->td_ucred, 0, &sin->sin_addr.s_addr)) {
2437                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2438                                         return (EINVAL);
2439                                 }
2440                         }
2441                         if (sin->sin_addr.s_addr != INADDR_ANY) {
2442                                 bindall = 0;
2443                         }
2444                 } else if (addr->sa_family == AF_INET6) {
2445                         /* Only for pure IPv6 Address. (No IPv4 Mapped!) */
2446                         struct sockaddr_in6 *sin6;
2447
2448                         sin6 = (struct sockaddr_in6 *)addr;
2449
2450                         if (addr->sa_len != sizeof(*sin6)) {
2451                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2452                                 return (EINVAL);
2453                         }
2454                         lport = sin6->sin6_port;
2455                         /*
2456                          * Jail checks for IPv6 should go HERE! i.e. add the
2457                          * prison_ip() equivilant in this postion to
2458                          * transmute the addresses to the proper one jailed.
2459                          */
2460                         if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2461                                 bindall = 0;
2462                                 /* KAME hack: embed scopeid */
2463                                 if (sa6_embedscope(sin6, ip6_use_defzone) != 0) {
2464                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2465                                         return (EINVAL);
2466                                 }
2467                         }
2468                         /* this must be cleared for ifa_ifwithaddr() */
2469                         sin6->sin6_scope_id = 0;
2470                 } else {
2471                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2472                         return (EAFNOSUPPORT);
2473                 }
2474         }
2475         SCTP_INP_INFO_WLOCK();
2476         SCTP_INP_WLOCK(inp);
2477         /* Setup a vrf_id to be the default for the non-bind-all case. */
2478         vrf_id = inp->def_vrf_id;
2479
2480         /* increase our count due to the unlock we do */
2481         SCTP_INP_INCR_REF(inp);
2482         if (lport) {
2483                 /*
2484                  * Did the caller specify a port? if so we must see if a ep
2485                  * already has this one bound.
2486                  */
2487                 /* got to be root to get at low ports */
2488                 if (ntohs(lport) < IPPORT_RESERVED) {
2489                         if (p && (error =
2490                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2491                             )) {
2492                                 SCTP_INP_DECR_REF(inp);
2493                                 SCTP_INP_WUNLOCK(inp);
2494                                 SCTP_INP_INFO_WUNLOCK();
2495                                 return (error);
2496                         }
2497                 }
2498                 if (p == NULL) {
2499                         SCTP_INP_DECR_REF(inp);
2500                         SCTP_INP_WUNLOCK(inp);
2501                         SCTP_INP_INFO_WUNLOCK();
2502                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2503                         return (error);
2504                 }
2505                 SCTP_INP_WUNLOCK(inp);
2506                 if (bindall) {
2507                         vrf_id = inp->def_vrf_id;
2508                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2509                         if (inp_tmp != NULL) {
2510                                 /*
2511                                  * lock guy returned and lower count note
2512                                  * that we are not bound so inp_tmp should
2513                                  * NEVER be inp. And it is this inp
2514                                  * (inp_tmp) that gets the reference bump,
2515                                  * so we must lower it.
2516                                  */
2517                                 SCTP_INP_DECR_REF(inp_tmp);
2518                                 SCTP_INP_DECR_REF(inp);
2519                                 /* unlock info */
2520                                 SCTP_INP_INFO_WUNLOCK();
2521                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2522                                 return (EADDRINUSE);
2523                         }
2524                 } else {
2525                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2526                         if (inp_tmp != NULL) {
2527                                 /*
2528                                  * lock guy returned and lower count note
2529                                  * that we are not bound so inp_tmp should
2530                                  * NEVER be inp. And it is this inp
2531                                  * (inp_tmp) that gets the reference bump,
2532                                  * so we must lower it.
2533                                  */
2534                                 SCTP_INP_DECR_REF(inp_tmp);
2535                                 SCTP_INP_DECR_REF(inp);
2536                                 /* unlock info */
2537                                 SCTP_INP_INFO_WUNLOCK();
2538                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2539                                 return (EADDRINUSE);
2540                         }
2541                 }
2542                 SCTP_INP_WLOCK(inp);
2543                 if (bindall) {
2544                         /* verify that no lport is not used by a singleton */
2545                         if (sctp_isport_inuse(inp, lport, vrf_id)) {
2546                                 /* Sorry someone already has this one bound */
2547                                 SCTP_INP_DECR_REF(inp);
2548                                 SCTP_INP_WUNLOCK(inp);
2549                                 SCTP_INP_INFO_WUNLOCK();
2550                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2551                                 return (EADDRINUSE);
2552                         }
2553                 }
2554         } else {
2555                 uint16_t first, last, candidate;
2556                 uint16_t count;
2557                 int done;
2558
2559                 if (ip_inp->inp_flags & INP_HIGHPORT) {
2560                         first = ipport_hifirstauto;
2561                         last = ipport_hilastauto;
2562                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2563                         if (p && (error =
2564                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2565                             )) {
2566                                 SCTP_INP_DECR_REF(inp);
2567                                 SCTP_INP_WUNLOCK(inp);
2568                                 SCTP_INP_INFO_WUNLOCK();
2569                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2570                                 return (error);
2571                         }
2572                         first = ipport_lowfirstauto;
2573                         last = ipport_lowlastauto;
2574                 } else {
2575                         first = ipport_firstauto;
2576                         last = ipport_lastauto;
2577                 }
2578                 if (first > last) {
2579                         uint16_t temp;
2580
2581                         temp = first;
2582                         first = last;
2583                         last = temp;
2584                 }
2585                 count = last - first + 1;       /* number of candidates */
2586                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2587
2588                 done = 0;
2589                 while (!done) {
2590                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == 0) {
2591                                 done = 1;
2592                         }
2593                         if (!done) {
2594                                 if (--count == 0) {
2595                                         SCTP_INP_DECR_REF(inp);
2596                                         SCTP_INP_WUNLOCK(inp);
2597                                         SCTP_INP_INFO_WUNLOCK();
2598                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2599                                         return (EADDRINUSE);
2600                                 }
2601                                 if (candidate == last)
2602                                         candidate = first;
2603                                 else
2604                                         candidate = candidate + 1;
2605                         }
2606                 }
2607                 lport = htons(candidate);
2608         }
2609         SCTP_INP_DECR_REF(inp);
2610         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2611             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2612                 /*
2613                  * this really should not happen. The guy did a non-blocking
2614                  * bind and then did a close at the same time.
2615                  */
2616                 SCTP_INP_WUNLOCK(inp);
2617                 SCTP_INP_INFO_WUNLOCK();
2618                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2619                 return (EINVAL);
2620         }
2621         /* ok we look clear to give out this port, so lets setup the binding */
2622         if (bindall) {
2623                 /* binding to all addresses, so just set in the proper flags */
2624                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
2625                 /* set the automatic addr changes from kernel flag */
2626                 if (sctp_auto_asconf == 0) {
2627                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2628                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2629                 } else {
2630                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2631                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2632                 }
2633                 /*
2634                  * set the automatic mobility_base from kernel flag (by
2635                  * micchie)
2636                  */
2637                 if (sctp_mobility_base == 0) {
2638                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
2639                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2640                 } else {
2641                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
2642                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2643                 }
2644                 /*
2645                  * set the automatic mobility_fasthandoff from kernel flag
2646                  * (by micchie)
2647                  */
2648                 if (sctp_mobility_fasthandoff == 0) {
2649                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
2650                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2651                 } else {
2652                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
2653                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2654                 }
2655         } else {
2656                 /*
2657                  * bind specific, make sure flags is off and add a new
2658                  * address structure to the sctp_addr_list inside the ep
2659                  * structure.
2660                  *
2661                  * We will need to allocate one and insert it at the head. The
2662                  * socketopt call can just insert new addresses in there as
2663                  * well. It will also have to do the embed scope kame hack
2664                  * too (before adding).
2665                  */
2666                 struct sctp_ifa *ifa;
2667                 struct sockaddr_storage store_sa;
2668
2669                 memset(&store_sa, 0, sizeof(store_sa));
2670                 if (addr->sa_family == AF_INET) {
2671                         struct sockaddr_in *sin;
2672
2673                         sin = (struct sockaddr_in *)&store_sa;
2674                         memcpy(sin, addr, sizeof(struct sockaddr_in));
2675                         sin->sin_port = 0;
2676                 } else if (addr->sa_family == AF_INET6) {
2677                         struct sockaddr_in6 *sin6;
2678
2679                         sin6 = (struct sockaddr_in6 *)&store_sa;
2680                         memcpy(sin6, addr, sizeof(struct sockaddr_in6));
2681                         sin6->sin6_port = 0;
2682                 }
2683                 /*
2684                  * first find the interface with the bound address need to
2685                  * zero out the port to find the address! yuck! can't do
2686                  * this earlier since need port for sctp_pcb_findep()
2687                  */
2688                 if (sctp_ifap != NULL)
2689                         ifa = sctp_ifap;
2690                 else {
2691                         /*
2692                          * Note for BSD we hit here always other O/S's will
2693                          * pass things in via the sctp_ifap argument
2694                          * (Panda).
2695                          */
2696                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
2697                             vrf_id, SCTP_ADDR_NOT_LOCKED);
2698                 }
2699                 if (ifa == NULL) {
2700                         /* Can't find an interface with that address */
2701                         SCTP_INP_WUNLOCK(inp);
2702                         SCTP_INP_INFO_WUNLOCK();
2703                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
2704                         return (EADDRNOTAVAIL);
2705                 }
2706                 if (addr->sa_family == AF_INET6) {
2707                         /* GAK, more FIXME IFA lock? */
2708                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2709                                 /* Can't bind a non-existent addr. */
2710                                 SCTP_INP_WUNLOCK(inp);
2711                                 SCTP_INP_INFO_WUNLOCK();
2712                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2713                                 return (EINVAL);
2714                         }
2715                 }
2716                 /* we're not bound all */
2717                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
2718                 /* allow bindx() to send ASCONF's for binding changes */
2719                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2720                 /* clear automatic addr changes from kernel flag */
2721                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2722
2723                 /* add this address to the endpoint list */
2724                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
2725                 if (error != 0) {
2726                         SCTP_INP_WUNLOCK(inp);
2727                         SCTP_INP_INFO_WUNLOCK();
2728                         return (error);
2729                 }
2730                 inp->laddr_count++;
2731         }
2732         /* find the bucket */
2733         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
2734             sctppcbinfo.hashmark)];
2735         /* put it in the bucket */
2736         LIST_INSERT_HEAD(head, inp, sctp_hash);
2737         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d\n",
2738             head, ntohs(lport));
2739         /* set in the port */
2740         inp->sctp_lport = lport;
2741
2742         /* turn off just the unbound flag */
2743         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2744         SCTP_INP_WUNLOCK(inp);
2745         SCTP_INP_INFO_WUNLOCK();
2746         return (0);
2747 }
2748
2749
2750 static void
2751 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next)
2752 {
2753         struct sctp_iterator *it;
2754
2755         /*
2756          * We enter with the only the ITERATOR_LOCK in place and a write
2757          * lock on the inp_info stuff.
2758          */
2759
2760         /*
2761          * Go through all iterators, we must do this since it is possible
2762          * that some iterator does NOT have the lock, but is waiting for it.
2763          * And the one that had the lock has either moved in the last
2764          * iteration or we just cleared it above. We need to find all of
2765          * those guys. The list of iterators should never be very big
2766          * though.
2767          */
2768         TAILQ_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) {
2769                 if (it == inp->inp_starting_point_for_iterator)
2770                         /* skip this guy, he's special */
2771                         continue;
2772                 if (it->inp == inp) {
2773                         /*
2774                          * This is tricky and we DON'T lock the iterator.
2775                          * Reason is he's running but waiting for me since
2776                          * inp->inp_starting_point_for_iterator has the lock
2777                          * on me (the guy above we skipped). This tells us
2778                          * its is not running but waiting for
2779                          * inp->inp_starting_point_for_iterator to be
2780                          * released by the guy that does have our INP in a
2781                          * lock.
2782                          */
2783                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2784                                 it->inp = NULL;
2785                                 it->stcb = NULL;
2786                         } else {
2787                                 /* set him up to do the next guy not me */
2788                                 it->inp = inp_next;
2789                                 it->stcb = NULL;
2790                         }
2791                 }
2792         }
2793         it = inp->inp_starting_point_for_iterator;
2794         if (it) {
2795                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2796                         it->inp = NULL;
2797                 } else {
2798                         it->inp = inp_next;
2799                 }
2800                 it->stcb = NULL;
2801         }
2802 }
2803
2804 /* release sctp_inpcb unbind the port */
2805 void
2806 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
2807 {
2808         /*
2809          * Here we free a endpoint. We must find it (if it is in the Hash
2810          * table) and remove it from there. Then we must also find it in the
2811          * overall list and remove it from there. After all removals are
2812          * complete then any timer has to be stopped. Then start the actual
2813          * freeing. a) Any local lists. b) Any associations. c) The hash of
2814          * all associations. d) finally the ep itself.
2815          */
2816         struct sctp_pcb *m;
2817         struct sctp_inpcb *inp_save;
2818         struct sctp_tcb *asoc, *nasoc;
2819         struct sctp_laddr *laddr, *nladdr;
2820         struct inpcb *ip_pcb;
2821         struct socket *so;
2822
2823         struct sctp_queued_to_read *sq;
2824
2825
2826         int cnt;
2827         sctp_sharedkey_t *shared_key;
2828
2829
2830 #ifdef SCTP_LOG_CLOSING
2831         sctp_log_closing(inp, NULL, 0);
2832 #endif
2833         SCTP_ITERATOR_LOCK();
2834         so = inp->sctp_socket;
2835         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2836                 /* been here before.. eeks.. get out of here */
2837                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
2838                 SCTP_ITERATOR_UNLOCK();
2839 #ifdef SCTP_LOG_CLOSING
2840                 sctp_log_closing(inp, NULL, 1);
2841 #endif
2842                 return;
2843         }
2844         SCTP_ASOC_CREATE_LOCK(inp);
2845         SCTP_INP_INFO_WLOCK();
2846
2847         SCTP_INP_WLOCK(inp);
2848         /* First time through we have the socket lock, after that no more. */
2849         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
2850                 /*
2851                  * Once we are in we can remove the flag from = 1 is only
2852                  * passed from the actual closing routines that are called
2853                  * via the sockets layer.
2854                  */
2855                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
2856                 /* socket is gone, so no more wakeups allowed */
2857                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
2858                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
2859                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
2860         }
2861         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
2862             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
2863
2864         if (inp->control) {
2865                 sctp_m_freem(inp->control);
2866                 inp->control = NULL;
2867         }
2868         if (inp->pkt) {
2869                 sctp_m_freem(inp->pkt);
2870                 inp->pkt = NULL;
2871         }
2872         m = &inp->sctp_ep;
2873         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
2874                                          * here but I will be nice :> (i.e.
2875                                          * ip_pcb = ep;) */
2876         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
2877                 int cnt_in_sd;
2878
2879                 cnt_in_sd = 0;
2880                 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2881                     asoc = nasoc) {
2882                         SCTP_TCB_LOCK(asoc);
2883                         nasoc = LIST_NEXT(asoc, sctp_tcblist);
2884                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2885                                 /* Skip guys being freed */
2886                                 /* asoc->sctp_socket = NULL; FIXME MT */
2887                                 cnt_in_sd++;
2888                                 SCTP_TCB_UNLOCK(asoc);
2889                                 continue;
2890                         }
2891                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
2892                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
2893                                 /*
2894                                  * If we have data in queue, we don't want
2895                                  * to just free since the app may have done,
2896                                  * send()/close or connect/send/close. And
2897                                  * it wants the data to get across first.
2898                                  */
2899                                 /* Just abandon things in the front states */
2900                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
2901                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
2902                                         cnt_in_sd++;
2903                                 }
2904                                 continue;
2905                         }
2906                         /* Disconnect the socket please */
2907                         asoc->sctp_socket = NULL;
2908                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
2909                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
2910                             (asoc->asoc.control_pdapi) ||
2911                             (asoc->asoc.size_on_all_streams > 0) ||
2912                             (so && (so->so_rcv.sb_cc > 0))
2913                             ) {
2914                                 /* Left with Data unread */
2915                                 struct mbuf *op_err;
2916
2917                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
2918                                     0, M_DONTWAIT, 1, MT_DATA);
2919                                 if (op_err) {
2920                                         /* Fill in the user initiated abort */
2921                                         struct sctp_paramhdr *ph;
2922                                         uint32_t *ippp;
2923
2924                                         SCTP_BUF_LEN(op_err) =
2925                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
2926                                         ph = mtod(op_err,
2927                                             struct sctp_paramhdr *);
2928                                         ph->param_type = htons(
2929                                             SCTP_CAUSE_USER_INITIATED_ABT);
2930                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
2931                                         ippp = (uint32_t *) (ph + 1);
2932                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
2933                                 }
2934                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
2935 #if defined(SCTP_PANIC_ON_ABORT)
2936                                 panic("inpcb_free does an abort");
2937 #endif
2938                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
2939                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
2940                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2941                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2942                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2943                                 }
2944                                 if (sctp_free_assoc(inp, asoc,
2945                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
2946                                         cnt_in_sd++;
2947                                 }
2948                                 continue;
2949                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2950                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
2951                                     (asoc->asoc.stream_queue_cnt == 0)
2952                             ) {
2953                                 if (asoc->asoc.locked_on_sending) {
2954                                         goto abort_anyway;
2955                                 }
2956                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
2957                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
2958                                         /*
2959                                          * there is nothing queued to send,
2960                                          * so I send shutdown
2961                                          */
2962                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
2963                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2964                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2965                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2966                                         }
2967                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
2968                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
2969                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
2970                                             asoc->asoc.primary_destination);
2971                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2972                                             asoc->asoc.primary_destination);
2973                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
2974                                 }
2975                         } else {
2976                                 /* mark into shutdown pending */
2977                                 struct sctp_stream_queue_pending *sp;
2978
2979                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
2980                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2981                                     asoc->asoc.primary_destination);
2982                                 if (asoc->asoc.locked_on_sending) {
2983                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
2984                                             sctp_streamhead);
2985                                         if (sp == NULL) {
2986                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
2987                                                     asoc->asoc.locked_on_sending,
2988                                                     asoc->asoc.locked_on_sending->stream_no);
2989                                         } else {
2990                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
2991                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
2992                                         }
2993                                 }
2994                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2995                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
2996                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
2997                                         struct mbuf *op_err;
2998
2999                         abort_anyway:
3000                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3001                                             0, M_DONTWAIT, 1, MT_DATA);
3002                                         if (op_err) {
3003                                                 /*
3004                                                  * Fill in the user
3005                                                  * initiated abort
3006                                                  */
3007                                                 struct sctp_paramhdr *ph;
3008                                                 uint32_t *ippp;
3009
3010                                                 SCTP_BUF_LEN(op_err) =
3011                                                     (sizeof(struct sctp_paramhdr) +
3012                                                     sizeof(uint32_t));
3013                                                 ph = mtod(op_err,
3014                                                     struct sctp_paramhdr *);
3015                                                 ph->param_type = htons(
3016                                                     SCTP_CAUSE_USER_INITIATED_ABT);
3017                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3018                                                 ippp = (uint32_t *) (ph + 1);
3019                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
3020                                         }
3021                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3022 #if defined(SCTP_PANIC_ON_ABORT)
3023                                         panic("inpcb_free does an abort");
3024 #endif
3025
3026                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3027                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3028                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3029                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3030                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3031                                         }
3032                                         if (sctp_free_assoc(inp, asoc,
3033                                             SCTP_PCBFREE_NOFORCE,
3034                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3035                                                 cnt_in_sd++;
3036                                         }
3037                                         continue;
3038                                 } else {
3039                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3040                                 }
3041                         }
3042                         cnt_in_sd++;
3043                         SCTP_TCB_UNLOCK(asoc);
3044                 }
3045                 /* now is there some left in our SHUTDOWN state? */
3046                 if (cnt_in_sd) {
3047                         SCTP_INP_WUNLOCK(inp);
3048                         SCTP_ASOC_CREATE_UNLOCK(inp);
3049                         SCTP_INP_INFO_WUNLOCK();
3050                         SCTP_ITERATOR_UNLOCK();
3051 #ifdef SCTP_LOG_CLOSING
3052                         sctp_log_closing(inp, NULL, 2);
3053 #endif
3054                         return;
3055                 }
3056         }
3057         inp->sctp_socket = NULL;
3058         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3059             SCTP_PCB_FLAGS_UNBOUND) {
3060                 /*
3061                  * ok, this guy has been bound. It's port is somewhere in
3062                  * the sctppcbinfo hash table. Remove it!
3063                  */
3064                 LIST_REMOVE(inp, sctp_hash);
3065                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3066         }
3067         /*
3068          * If there is a timer running to kill us, forget it, since it may
3069          * have a contest on the INP lock.. which would cause us to die ...
3070          */
3071         cnt = 0;
3072         for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
3073             asoc = nasoc) {
3074                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
3075                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3076                         cnt++;
3077                         continue;
3078                 }
3079                 /* Free associations that are NOT killing us */
3080                 SCTP_TCB_LOCK(asoc);
3081                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3082                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3083                         struct mbuf *op_err;
3084                         uint32_t *ippp;
3085
3086                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3087                             0, M_DONTWAIT, 1, MT_DATA);
3088                         if (op_err) {
3089                                 /* Fill in the user initiated abort */
3090                                 struct sctp_paramhdr *ph;
3091
3092                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
3093                                     sizeof(uint32_t));
3094                                 ph = mtod(op_err, struct sctp_paramhdr *);
3095                                 ph->param_type = htons(
3096                                     SCTP_CAUSE_USER_INITIATED_ABT);
3097                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3098                                 ippp = (uint32_t *) (ph + 1);
3099                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
3100
3101                         }
3102                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3103 #if defined(SCTP_PANIC_ON_ABORT)
3104                         panic("inpcb_free does an abort");
3105 #endif
3106                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3107                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3108                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3109                         cnt++;
3110                         SCTP_TCB_UNLOCK(asoc);
3111                         continue;
3112                 }
3113                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3114                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3115                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3116                 }
3117                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3118                         cnt++;
3119                 }
3120         }
3121         if (cnt) {
3122                 /* Ok we have someone out there that will kill us */
3123                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3124                 SCTP_INP_WUNLOCK(inp);
3125                 SCTP_ASOC_CREATE_UNLOCK(inp);
3126                 SCTP_INP_INFO_WUNLOCK();
3127                 SCTP_ITERATOR_UNLOCK();
3128 #ifdef SCTP_LOG_CLOSING
3129                 sctp_log_closing(inp, NULL, 3);
3130 #endif
3131                 return;
3132         }
3133         if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3134                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3135                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3136                 SCTP_INP_WUNLOCK(inp);
3137                 SCTP_ASOC_CREATE_UNLOCK(inp);
3138                 SCTP_INP_INFO_WUNLOCK();
3139                 SCTP_ITERATOR_UNLOCK();
3140 #ifdef SCTP_LOG_CLOSING
3141                 sctp_log_closing(inp, NULL, 4);
3142 #endif
3143                 return;
3144         }
3145         (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3146         inp->sctp_ep.signature_change.type = 0;
3147         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3148
3149 #ifdef SCTP_LOG_CLOSING
3150         sctp_log_closing(inp, NULL, 5);
3151 #endif
3152
3153         (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3154         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE;
3155         /* Clear the read queue */
3156         /* sa_ignore FREED_MEMORY */
3157         while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) {
3158                 /* Its only abandoned if it had data left */
3159                 if (sq->length)
3160                         SCTP_STAT_INCR(sctps_left_abandon);
3161
3162                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3163                 sctp_free_remote_addr(sq->whoFrom);
3164                 if (so)
3165                         so->so_rcv.sb_cc -= sq->length;
3166                 if (sq->data) {
3167                         sctp_m_freem(sq->data);
3168                         sq->data = NULL;
3169                 }
3170                 /*
3171                  * no need to free the net count, since at this point all
3172                  * assoc's are gone.
3173                  */
3174                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq);
3175                 SCTP_DECR_READQ_COUNT();
3176         }
3177         /* Now the sctp_pcb things */
3178         /*
3179          * free each asoc if it is not already closed/free. we can't use the
3180          * macro here since le_next will get freed as part of the
3181          * sctp_free_assoc() call.
3182          */
3183         cnt = 0;
3184         if (so) {
3185 #ifdef IPSEC
3186                 ipsec4_delete_pcbpolicy(ip_pcb);
3187 #endif                          /* IPSEC */
3188
3189                 /* Unlocks not needed since the socket is gone now */
3190         }
3191         if (ip_pcb->inp_options) {
3192                 (void)sctp_m_free(ip_pcb->inp_options);
3193                 ip_pcb->inp_options = 0;
3194         }
3195         if (ip_pcb->inp_moptions) {
3196                 inp_freemoptions(ip_pcb->inp_moptions);
3197                 ip_pcb->inp_moptions = 0;
3198         }
3199 #ifdef INET6
3200         if (ip_pcb->inp_vflag & INP_IPV6) {
3201                 struct in6pcb *in6p;
3202
3203                 in6p = (struct in6pcb *)inp;
3204                 ip6_freepcbopts(in6p->in6p_outputopts);
3205         }
3206 #endif                          /* INET6 */
3207         ip_pcb->inp_vflag = 0;
3208         /* free up authentication fields */
3209         if (inp->sctp_ep.local_auth_chunks != NULL)
3210                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3211         if (inp->sctp_ep.local_hmacs != NULL)
3212                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3213
3214         shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
3215         while (shared_key) {
3216                 LIST_REMOVE(shared_key, next);
3217                 sctp_free_sharedkey(shared_key);
3218                 /* sa_ignore FREED_MEMORY */
3219                 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
3220         }
3221
3222         inp_save = LIST_NEXT(inp, sctp_list);
3223         LIST_REMOVE(inp, sctp_list);
3224
3225         /* fix any iterators only after out of the list */
3226         sctp_iterator_inp_being_freed(inp, inp_save);
3227         /*
3228          * if we have an address list the following will free the list of
3229          * ifaddr's that are set into this ep. Again macro limitations here,
3230          * since the LIST_FOREACH could be a bad idea.
3231          */
3232         for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
3233             laddr = nladdr) {
3234                 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
3235                 sctp_remove_laddr(laddr);
3236         }
3237
3238 #ifdef SCTP_TRACK_FREED_ASOCS
3239         /* TEMP CODE */
3240         for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL;
3241             asoc = nasoc) {
3242                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
3243                 LIST_REMOVE(asoc, sctp_tcblist);
3244                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, asoc);
3245                 SCTP_DECR_ASOC_COUNT();
3246         }
3247         /* *** END TEMP CODE *** */
3248 #endif
3249         /* Now lets see about freeing the EP hash table. */
3250         if (inp->sctp_tcbhash != NULL) {
3251                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3252                 inp->sctp_tcbhash = NULL;
3253         }
3254         /* Now we must put the ep memory back into the zone pool */
3255         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3256         SCTP_INP_LOCK_DESTROY(inp);
3257         SCTP_INP_READ_DESTROY(inp);
3258         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3259         SCTP_INP_INFO_WUNLOCK();
3260         SCTP_ITERATOR_UNLOCK();
3261         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
3262         SCTP_DECR_EP_COUNT();
3263 }
3264
3265
3266 struct sctp_nets *
3267 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3268 {
3269         struct sctp_nets *net;
3270
3271         /* locate the address */
3272         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3273                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3274                         return (net);
3275         }
3276         return (NULL);
3277 }
3278
3279
3280 int
3281 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3282 {
3283         struct sctp_ifa *sctp_ifa;
3284
3285         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3286         if (sctp_ifa) {
3287                 return (1);
3288         } else {
3289                 return (0);
3290         }
3291 }
3292
3293 /*
3294  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3295  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3296  * stats of stuff.
3297  */
3298 int
3299 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3300     int set_scope, int from)
3301 {
3302         /*
3303          * The following is redundant to the same lines in the
3304          * sctp_aloc_assoc() but is needed since other's call the add
3305          * address function
3306          */
3307         struct sctp_nets *net, *netfirst;
3308         int addr_inscope;
3309
3310         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3311             from);
3312         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3313
3314         netfirst = sctp_findnet(stcb, newaddr);
3315         if (netfirst) {
3316                 /*
3317                  * Lie and return ok, we don't want to make the association
3318                  * go away for this behavior. It will happen in the TCP
3319                  * model in a connected socket. It does not reach the hash
3320                  * table until after the association is built so it can't be
3321                  * found. Mark as reachable, since the initial creation will
3322                  * have been cleared and the NOT_IN_ASSOC flag will have
3323                  * been added... and we don't want to end up removing it
3324                  * back out.
3325                  */
3326                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3327                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3328                             SCTP_ADDR_UNCONFIRMED);
3329                 } else {
3330                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3331                 }
3332
3333                 return (0);
3334         }
3335         addr_inscope = 1;
3336         if (newaddr->sa_family == AF_INET) {
3337                 struct sockaddr_in *sin;
3338
3339                 sin = (struct sockaddr_in *)newaddr;
3340                 if (sin->sin_addr.s_addr == 0) {
3341                         /* Invalid address */
3342                         return (-1);
3343                 }
3344                 /* zero out the bzero area */
3345                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3346
3347                 /* assure len is set */
3348                 sin->sin_len = sizeof(struct sockaddr_in);
3349                 if (set_scope) {
3350 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3351                         stcb->ipv4_local_scope = 1;
3352 #else
3353                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3354                                 stcb->asoc.ipv4_local_scope = 1;
3355                         }
3356 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3357                 } else {
3358                         /* Validate the address is in scope */
3359                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3360                             (stcb->asoc.ipv4_local_scope == 0)) {
3361                                 addr_inscope = 0;
3362                         }
3363                 }
3364         } else if (newaddr->sa_family == AF_INET6) {
3365                 struct sockaddr_in6 *sin6;
3366
3367                 sin6 = (struct sockaddr_in6 *)newaddr;
3368                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3369                         /* Invalid address */
3370                         return (-1);
3371                 }
3372                 /* assure len is set */
3373                 sin6->sin6_len = sizeof(struct sockaddr_in6);
3374                 if (set_scope) {
3375                         if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3376                                 stcb->asoc.loopback_scope = 1;
3377                                 stcb->asoc.local_scope = 0;
3378                                 stcb->asoc.ipv4_local_scope = 1;
3379                                 stcb->asoc.site_scope = 1;
3380                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3381                                 /*
3382                                  * If the new destination is a LINK_LOCAL we
3383                                  * must have common site scope. Don't set
3384                                  * the local scope since we may not share
3385                                  * all links, only loopback can do this.
3386                                  * Links on the local network would also be
3387                                  * on our private network for v4 too.
3388                                  */
3389                                 stcb->asoc.ipv4_local_scope = 1;
3390                                 stcb->asoc.site_scope = 1;
3391                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3392                                 /*
3393                                  * If the new destination is SITE_LOCAL then
3394                                  * we must have site scope in common.
3395                                  */
3396                                 stcb->asoc.site_scope = 1;
3397                         }
3398                 } else {
3399                         /* Validate the address is in scope */
3400                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3401                             (stcb->asoc.loopback_scope == 0)) {
3402                                 addr_inscope = 0;
3403                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3404                             (stcb->asoc.local_scope == 0)) {
3405                                 addr_inscope = 0;
3406                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3407                             (stcb->asoc.site_scope == 0)) {
3408                                 addr_inscope = 0;
3409                         }
3410                 }
3411         } else {
3412                 /* not supported family type */
3413                 return (-1);
3414         }
3415         net = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net, struct sctp_nets);
3416         if (net == NULL) {
3417                 return (-1);
3418         }
3419         SCTP_INCR_RADDR_COUNT();
3420         bzero(net, sizeof(*net));
3421         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3422         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3423         if (newaddr->sa_family == AF_INET) {
3424                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3425         } else if (newaddr->sa_family == AF_INET6) {
3426                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3427         }
3428         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3429         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3430                 stcb->asoc.loopback_scope = 1;
3431                 stcb->asoc.ipv4_local_scope = 1;
3432                 stcb->asoc.local_scope = 0;
3433                 stcb->asoc.site_scope = 1;
3434                 addr_inscope = 1;
3435         }
3436         net->failure_threshold = stcb->asoc.def_net_failure;
3437         if (addr_inscope == 0) {
3438                 net->dest_state = (SCTP_ADDR_REACHABLE |
3439                     SCTP_ADDR_OUT_OF_SCOPE);
3440         } else {
3441                 if (from == SCTP_ADDR_IS_CONFIRMED)
3442                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3443                         net->dest_state = SCTP_ADDR_REACHABLE;
3444                 else
3445                         net->dest_state = SCTP_ADDR_REACHABLE |
3446                             SCTP_ADDR_UNCONFIRMED;
3447         }
3448         /*
3449          * We set this to 0, the timer code knows that this means its an
3450          * initial value
3451          */
3452         net->RTO = 0;
3453         net->RTO_measured = 0;
3454         stcb->asoc.numnets++;
3455         *(&net->ref_count) = 1;
3456         net->tos_flowlabel = 0;
3457 #ifdef INET
3458         if (newaddr->sa_family == AF_INET)
3459                 net->tos_flowlabel = stcb->asoc.default_tos;
3460 #endif
3461 #ifdef INET6
3462         if (newaddr->sa_family == AF_INET6)
3463                 net->tos_flowlabel = stcb->asoc.default_flowlabel;
3464 #endif
3465         /* Init the timer structure */
3466         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3467         SCTP_OS_TIMER_INIT(&net->fr_timer.timer);
3468         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3469
3470         /* Now generate a route for this guy */
3471         /* KAME hack: embed scopeid */
3472         if (newaddr->sa_family == AF_INET6) {
3473                 struct sockaddr_in6 *sin6;
3474
3475                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3476                 (void)sa6_embedscope(sin6, ip6_use_defzone);
3477                 sin6->sin6_scope_id = 0;
3478         }
3479         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3480
3481         if (newaddr->sa_family == AF_INET6) {
3482                 struct sockaddr_in6 *sin6;
3483
3484                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3485                 (void)sa6_recoverscope(sin6);
3486         }
3487         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3488                 /* Get source address */
3489                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3490                     stcb,
3491                     (sctp_route_t *) & net->ro,
3492                     net,
3493                     0,
3494                     stcb->asoc.vrf_id);
3495                 /* Now get the interface MTU */
3496                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3497                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3498                 } else {
3499                         net->mtu = 0;
3500                 }
3501 #ifdef SCTP_PRINT_FOR_B_AND_M
3502                 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu);
3503 #endif
3504                 if (net->mtu == 0) {
3505                         /* Huh ?? */
3506                         net->mtu = SCTP_DEFAULT_MTU;
3507                 } else {
3508                         uint32_t rmtu;
3509
3510                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3511 #ifdef SCTP_PRINT_FOR_B_AND_M
3512                         SCTP_PRINTF("The route mtu is %d\n", rmtu);
3513 #endif
3514                         if (rmtu == 0) {
3515                                 /*
3516                                  * Start things off to match mtu of
3517                                  * interface please.
3518                                  */
3519                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3520                                     net->ro.ro_rt, net->mtu);
3521                         } else {
3522                                 /*
3523                                  * we take the route mtu over the interface,
3524                                  * since the route may be leading out the
3525                                  * loopback, or a different interface.
3526                                  */
3527                                 net->mtu = rmtu;
3528                         }
3529                 }
3530                 if (from == SCTP_ALLOC_ASOC) {
3531 #ifdef SCTP_PRINT_FOR_B_AND_M
3532                         SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu);
3533 #endif
3534                         stcb->asoc.smallest_mtu = net->mtu;
3535                 }
3536         } else {
3537                 net->mtu = stcb->asoc.smallest_mtu;
3538         }
3539         if (stcb->asoc.smallest_mtu > net->mtu) {
3540 #ifdef SCTP_PRINT_FOR_B_AND_M
3541                 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n",
3542                     net->mtu, stcb->asoc.smallest_mtu);
3543 #endif
3544                 stcb->asoc.smallest_mtu = net->mtu;
3545         }
3546         /* JRS - Use the congestion control given in the CC module */
3547         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
3548
3549         /*
3550          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3551          * of assoc (2005/06/27, iyengar@cis.udel.edu)
3552          */
3553         net->find_pseudo_cumack = 1;
3554         net->find_rtx_pseudo_cumack = 1;
3555         net->src_addr_selected = 0;
3556         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3557         if (net->ro.ro_rt == NULL) {
3558                 /* Since we have no route put it at the back */
3559                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3560         } else if (netfirst == NULL) {
3561                 /* We are the first one in the pool. */
3562                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3563         } else if (netfirst->ro.ro_rt == NULL) {
3564                 /*
3565                  * First one has NO route. Place this one ahead of the first
3566                  * one.
3567                  */
3568                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3569         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
3570                 /*
3571                  * This one has a different interface than the one at the
3572                  * top of the list. Place it ahead.
3573                  */
3574                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3575         } else {
3576                 /*
3577                  * Ok we have the same interface as the first one. Move
3578                  * forward until we find either a) one with a NULL route...
3579                  * insert ahead of that b) one with a different ifp.. insert
3580                  * after that. c) end of the list.. insert at the tail.
3581                  */
3582                 struct sctp_nets *netlook;
3583
3584                 do {
3585                         netlook = TAILQ_NEXT(netfirst, sctp_next);
3586                         if (netlook == NULL) {
3587                                 /* End of the list */
3588                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3589                                 break;
3590                         } else if (netlook->ro.ro_rt == NULL) {
3591                                 /* next one has NO route */
3592                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
3593                                 break;
3594                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
3595                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
3596                                     net, sctp_next);
3597                                 break;
3598                         }
3599                         /* Shift forward */
3600                         netfirst = netlook;
3601                 } while (netlook != NULL);
3602         }
3603
3604         /* got to have a primary set */
3605         if (stcb->asoc.primary_destination == 0) {
3606                 stcb->asoc.primary_destination = net;
3607         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
3608                     (net->ro.ro_rt) &&
3609             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
3610                 /* No route to current primary adopt new primary */
3611                 stcb->asoc.primary_destination = net;
3612         }
3613         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
3614             net);
3615         /* Validate primary is first */
3616         net = TAILQ_FIRST(&stcb->asoc.nets);
3617         if ((net != stcb->asoc.primary_destination) &&
3618             (stcb->asoc.primary_destination)) {
3619                 /*
3620                  * first one on the list is NOT the primary sctp_cmpaddr()
3621                  * is much more efficent if the primary is the first on the
3622                  * list, make it so.
3623                  */
3624                 TAILQ_REMOVE(&stcb->asoc.nets,
3625                     stcb->asoc.primary_destination, sctp_next);
3626                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
3627                     stcb->asoc.primary_destination, sctp_next);
3628         }
3629         return (0);
3630 }
3631
3632
3633 /*
3634  * allocate an association and add it to the endpoint. The caller must be
3635  * careful to add all additional addresses once they are know right away or
3636  * else the assoc will be may experience a blackout scenario.
3637  */
3638 struct sctp_tcb *
3639 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
3640     int for_a_init, int *error, uint32_t override_tag, uint32_t vrf_id,
3641     struct thread *p
3642 )
3643 {
3644         /* note the p argument is only valid in unbound sockets */
3645
3646         struct sctp_tcb *stcb;
3647         struct sctp_association *asoc;
3648         struct sctpasochead *head;
3649         uint16_t rport;
3650         int err;
3651
3652         /*
3653          * Assumption made here: Caller has done a
3654          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
3655          * address does not exist already.
3656          */
3657         if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) {
3658                 /* Hit max assoc, sorry no more */
3659                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
3660                 *error = ENOBUFS;
3661                 return (NULL);
3662         }
3663         if (firstaddr == NULL) {
3664                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3665                 *error = EINVAL;
3666                 return (NULL);
3667         }
3668         SCTP_INP_RLOCK(inp);
3669         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
3670                 /*
3671                  * If its in the TCP pool, its NOT allowed to create an
3672                  * association. The parent listener needs to call
3673                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
3674                  * off, or connected one does this.. its an error.
3675                  */
3676                 SCTP_INP_RUNLOCK(inp);
3677                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3678                 *error = EINVAL;
3679                 return (NULL);
3680         }
3681         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
3682 #ifdef SCTP_DEBUG
3683         if (firstaddr) {
3684                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
3685                 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
3686                     ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
3687         } else {
3688                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
3689         }
3690 #endif                          /* SCTP_DEBUG */
3691         if (firstaddr->sa_family == AF_INET) {
3692                 struct sockaddr_in *sin;
3693
3694                 sin = (struct sockaddr_in *)firstaddr;
3695                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
3696                         /* Invalid address */
3697                         SCTP_INP_RUNLOCK(inp);
3698                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3699                         *error = EINVAL;
3700                         return (NULL);
3701                 }
3702                 rport = sin->sin_port;
3703         } else if (firstaddr->sa_family == AF_INET6) {
3704                 struct sockaddr_in6 *sin6;
3705
3706                 sin6 = (struct sockaddr_in6 *)firstaddr;
3707                 if ((sin6->sin6_port == 0) ||
3708                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
3709                         /* Invalid address */
3710                         SCTP_INP_RUNLOCK(inp);
3711                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3712                         *error = EINVAL;
3713                         return (NULL);
3714                 }
3715                 rport = sin6->sin6_port;
3716         } else {
3717                 /* not supported family type */
3718                 SCTP_INP_RUNLOCK(inp);
3719                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3720                 *error = EINVAL;
3721                 return (NULL);
3722         }
3723         SCTP_INP_RUNLOCK(inp);
3724         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
3725                 /*
3726                  * If you have not performed a bind, then we need to do the
3727                  * ephemerial bind for you.
3728                  */
3729                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
3730                     (struct sockaddr *)NULL,
3731                     (struct sctp_ifa *)NULL,
3732                     p
3733                     ))) {
3734                         /* bind error, probably perm */
3735                         *error = err;
3736                         return (NULL);
3737                 }
3738         }
3739         stcb = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc, struct sctp_tcb);
3740         if (stcb == NULL) {
3741                 /* out of memory? */
3742                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
3743                 *error = ENOMEM;
3744                 return (NULL);
3745         }
3746         SCTP_INCR_ASOC_COUNT();
3747
3748         bzero(stcb, sizeof(*stcb));
3749         asoc = &stcb->asoc;
3750         SCTP_TCB_LOCK_INIT(stcb);
3751         SCTP_TCB_SEND_LOCK_INIT(stcb);
3752         /* setup back pointer's */
3753         stcb->sctp_ep = inp;
3754         stcb->sctp_socket = inp->sctp_socket;
3755         if ((err = sctp_init_asoc(inp, stcb, for_a_init, override_tag, vrf_id))) {
3756                 /* failed */
3757                 SCTP_TCB_LOCK_DESTROY(stcb);
3758                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3759                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3760                 SCTP_DECR_ASOC_COUNT();
3761                 *error = err;
3762                 return (NULL);
3763         }
3764         /* and the port */
3765         stcb->rport = rport;
3766         SCTP_INP_INFO_WLOCK();
3767         SCTP_INP_WLOCK(inp);
3768         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3769                 /* inpcb freed while alloc going on */
3770                 SCTP_TCB_LOCK_DESTROY(stcb);
3771                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3772                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3773                 SCTP_INP_WUNLOCK(inp);
3774                 SCTP_INP_INFO_WUNLOCK();
3775                 SCTP_DECR_ASOC_COUNT();
3776                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3777                 *error = EINVAL;
3778                 return (NULL);
3779         }
3780         SCTP_TCB_LOCK(stcb);
3781
3782         /* now that my_vtag is set, add it to the hash */
3783         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
3784             sctppcbinfo.hashasocmark)];
3785         /* put it in the bucket in the vtag hash of assoc's for the system */
3786         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
3787         sctp_delete_from_timewait(stcb->asoc.my_vtag);
3788
3789         SCTP_INP_INFO_WUNLOCK();
3790
3791         if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
3792                 /* failure.. memory error? */
3793                 if (asoc->strmout) {
3794                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
3795                         asoc->strmout = NULL;
3796                 }
3797                 if (asoc->mapping_array) {
3798                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
3799                         asoc->mapping_array = NULL;
3800                 }
3801                 SCTP_DECR_ASOC_COUNT();
3802                 SCTP_TCB_LOCK_DESTROY(stcb);
3803                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3804                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3805                 SCTP_INP_WUNLOCK(inp);
3806                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
3807                 *error = ENOBUFS;
3808                 return (NULL);
3809         }
3810         /* Init all the timers */
3811         SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer);
3812         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
3813         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
3814         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
3815         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
3816         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
3817         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
3818         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
3819
3820         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
3821         /* now file the port under the hash as well */
3822         if (inp->sctp_tcbhash != NULL) {
3823                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
3824                     inp->sctp_hashmark)];
3825                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
3826         }
3827         SCTP_INP_WUNLOCK(inp);
3828         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
3829         return (stcb);
3830 }
3831
3832
3833 void
3834 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
3835 {
3836         struct sctp_association *asoc;
3837
3838         asoc = &stcb->asoc;
3839         asoc->numnets--;
3840         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3841         if (net == asoc->primary_destination) {
3842                 /* Reset primary */
3843                 struct sctp_nets *lnet;
3844
3845                 lnet = TAILQ_FIRST(&asoc->nets);
3846                 /*
3847                  * Mobility adaptation Ideally, if deleted destination is
3848                  * the primary, it becomes a fast retransmission trigger by
3849                  * the subsequent SET PRIMARY. (by micchie)
3850                  */
3851                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
3852                     SCTP_MOBILITY_BASE) ||
3853                     sctp_is_mobility_feature_on(stcb->sctp_ep,
3854                     SCTP_MOBILITY_FASTHANDOFF)) {
3855                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
3856                         if (asoc->deleted_primary != NULL) {
3857                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
3858                                 goto leave;
3859                         }
3860                         asoc->deleted_primary = net;
3861                         atomic_add_int(&net->ref_count, 1);
3862                         memset(&net->lastsa, 0, sizeof(net->lastsa));
3863                         memset(&net->lastsv, 0, sizeof(net->lastsv));
3864                         sctp_mobility_feature_on(stcb->sctp_ep,
3865                             SCTP_MOBILITY_PRIM_DELETED);
3866                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
3867                             stcb->sctp_ep, stcb, NULL);
3868                 }
3869 leave:
3870                 /* Try to find a confirmed primary */
3871                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
3872         }
3873         if (net == asoc->last_data_chunk_from) {
3874                 /* Reset primary */
3875                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
3876         }
3877         if (net == asoc->last_control_chunk_from) {
3878                 /* Clear net */
3879                 asoc->last_control_chunk_from = NULL;
3880         }
3881         sctp_free_remote_addr(net);
3882 }
3883
3884 /*
3885  * remove a remote endpoint address from an association, it will fail if the
3886  * address does not exist.
3887  */
3888 int
3889 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
3890 {
3891         /*
3892          * Here we need to remove a remote address. This is quite simple, we
3893          * first find it in the list of address for the association
3894          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
3895          * on that item. Note we do not allow it to be removed if there are
3896          * no other addresses.
3897          */
3898         struct sctp_association *asoc;
3899         struct sctp_nets *net, *net_tmp;
3900
3901         asoc = &stcb->asoc;
3902
3903         /* locate the address */
3904         for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
3905                 net_tmp = TAILQ_NEXT(net, sctp_next);
3906                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
3907                         continue;
3908                 }
3909                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
3910                     remaddr)) {
3911                         /* we found the guy */
3912                         if (asoc->numnets < 2) {
3913                                 /* Must have at LEAST two remote addresses */
3914                                 return (-1);
3915                         } else {
3916                                 sctp_remove_net(stcb, net);
3917                                 return (0);
3918                         }
3919                 }
3920         }
3921         /* not found. */
3922         return (-2);
3923 }
3924
3925 void
3926 sctp_delete_from_timewait(uint32_t tag)
3927 {
3928         struct sctpvtaghead *chain;
3929         struct sctp_tagblock *twait_block;
3930         int found = 0;
3931         int i;
3932
3933         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
3934         if (!SCTP_LIST_EMPTY(chain)) {
3935                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
3936                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
3937                                 if (twait_block->vtag_block[i].v_tag == tag) {
3938                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
3939                                         twait_block->vtag_block[i].v_tag = 0;
3940                                         found = 1;
3941                                         break;
3942                                 }
3943                         }
3944                         if (found)
3945                                 break;
3946                 }
3947         }
3948 }
3949
3950 int
3951 sctp_is_in_timewait(uint32_t tag)
3952 {
3953         struct sctpvtaghead *chain;
3954         struct sctp_tagblock *twait_block;
3955         int found = 0;
3956         int i;
3957
3958         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
3959         if (!SCTP_LIST_EMPTY(chain)) {
3960                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
3961                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
3962                                 if (twait_block->vtag_block[i].v_tag == tag) {
3963                                         found = 1;
3964                                         break;
3965                                 }
3966                         }
3967                         if (found)
3968                                 break;
3969                 }
3970         }
3971         return (found);
3972 }
3973
3974
3975 void
3976 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time)
3977 {
3978         struct sctpvtaghead *chain;
3979         struct sctp_tagblock *twait_block;
3980         struct timeval now;
3981         int set, i;
3982
3983         (void)SCTP_GETTIME_TIMEVAL(&now);
3984         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
3985         set = 0;
3986         if (!SCTP_LIST_EMPTY(chain)) {
3987                 /* Block(s) present, lets find space, and expire on the fly */
3988                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
3989                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
3990                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
3991                                     !set) {
3992                                         twait_block->vtag_block[i].tv_sec_at_expire =
3993                                             now.tv_sec + time;
3994                                         twait_block->vtag_block[i].v_tag = tag;
3995                                         set = 1;
3996                                 } else if ((twait_block->vtag_block[i].v_tag) &&
3997                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
3998                                         /* Audit expires this guy */
3999                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4000                                         twait_block->vtag_block[i].v_tag = 0;
4001                                         if (set == 0) {
4002                                                 /* Reuse it for my new tag */
4003                                                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4004                                                 twait_block->vtag_block[0].v_tag = tag;
4005                                                 set = 1;
4006                                         }
4007                                 }
4008                         }
4009                         if (set) {
4010                                 /*
4011                                  * We only do up to the block where we can
4012                                  * place our tag for audits
4013                                  */
4014                                 break;
4015                         }
4016                 }
4017         }
4018         /* Need to add a new block to chain */
4019         if (!set) {
4020                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4021                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4022                 if (twait_block == NULL) {
4023                         return;
4024                 }
4025                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4026                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4027                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4028                 twait_block->vtag_block[0].v_tag = tag;
4029         }
4030 }
4031
4032
4033 static void
4034 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4035 {
4036         struct sctp_iterator *it;
4037
4038         /*
4039          * Unlock the tcb lock we do this so we avoid a dead lock scenario
4040          * where the iterator is waiting on the TCB lock and the TCB lock is
4041          * waiting on the iterator lock.
4042          */
4043         it = stcb->asoc.stcb_starting_point_for_iterator;
4044         if (it == NULL) {
4045                 return;
4046         }
4047         if (it->inp != stcb->sctp_ep) {
4048                 /* hmm, focused on the wrong one? */
4049                 return;
4050         }
4051         if (it->stcb != stcb) {
4052                 return;
4053         }
4054         it->stcb = LIST_NEXT(stcb, sctp_tcblist);
4055         if (it->stcb == NULL) {
4056                 /* done with all asoc's in this assoc */
4057                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
4058                         it->inp = NULL;
4059                 } else {
4060                         it->inp = LIST_NEXT(inp, sctp_list);
4061                 }
4062         }
4063 }
4064
4065
4066 /*-
4067  * Free the association after un-hashing the remote port. This
4068  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4069  * expect that the input to this function IS a locked TCB.
4070  * It will return 0, if it did NOT destroy the association (instead
4071  * it unlocks it. It will return NON-zero if it either destroyed the
4072  * association OR the association is already destroyed.
4073  */
4074 int
4075 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4076 {
4077         int i;
4078         struct sctp_association *asoc;
4079         struct sctp_nets *net, *prev;
4080         struct sctp_laddr *laddr;
4081         struct sctp_tmit_chunk *chk;
4082         struct sctp_asconf_addr *aparam;
4083         struct sctp_asconf_ack *aack;
4084         struct sctp_stream_reset_list *liste;
4085         struct sctp_queued_to_read *sq;
4086         struct sctp_stream_queue_pending *sp;
4087         sctp_sharedkey_t *shared_key;
4088         struct socket *so;
4089         int ccnt = 0;
4090         int cnt = 0;
4091
4092         /* first, lets purge the entry from the hash table. */
4093
4094 #ifdef SCTP_LOG_CLOSING
4095         sctp_log_closing(inp, stcb, 6);
4096 #endif
4097         if (stcb->asoc.state == 0) {
4098 #ifdef SCTP_LOG_CLOSING
4099                 sctp_log_closing(inp, NULL, 7);
4100 #endif
4101                 /* there is no asoc, really TSNH :-0 */
4102                 return (1);
4103         }
4104         /* TEMP CODE */
4105         if (stcb->freed_from_where == 0) {
4106                 /* Only record the first place free happened from */
4107                 stcb->freed_from_where = from_location;
4108         }
4109         /* TEMP CODE */
4110
4111         asoc = &stcb->asoc;
4112         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4113             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4114                 /* nothing around */
4115                 so = NULL;
4116         else
4117                 so = inp->sctp_socket;
4118
4119         /*
4120          * We used timer based freeing if a reader or writer is in the way.
4121          * So we first check if we are actually being called from a timer,
4122          * if so we abort early if a reader or writer is still in the way.
4123          */
4124         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4125             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4126                 /*
4127                  * is it the timer driving us? if so are the reader/writers
4128                  * gone?
4129                  */
4130                 if (stcb->asoc.refcnt) {
4131                         /* nope, reader or writer in the way */
4132                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4133                         /* no asoc destroyed */
4134                         SCTP_TCB_UNLOCK(stcb);
4135 #ifdef SCTP_LOG_CLOSING
4136                         sctp_log_closing(inp, stcb, 8);
4137 #endif
4138                         return (0);
4139                 }
4140         }
4141         /* now clean up any other timers */
4142         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4143         asoc->hb_timer.self = NULL;
4144         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4145         asoc->dack_timer.self = NULL;
4146         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4147         /*-
4148          * For stream reset we don't blast this unless
4149          * it is a str-reset timer, it might be the
4150          * free-asoc timer which we DON'T want to
4151          * disturb.
4152          */
4153         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4154                 asoc->strreset_timer.self = NULL;
4155         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4156         asoc->asconf_timer.self = NULL;
4157         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4158         asoc->autoclose_timer.self = NULL;
4159         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4160         asoc->shut_guard_timer.self = NULL;
4161         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4162         asoc->delayed_event_timer.self = NULL;
4163         /* Mobility adaptation */
4164         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4165         asoc->delete_prim_timer.self = NULL;
4166         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4167                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4168                 net->fr_timer.self = NULL;
4169                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4170                 net->rxt_timer.self = NULL;
4171                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4172                 net->pmtu_timer.self = NULL;
4173         }
4174         /* Now the read queue needs to be cleaned up (only once) */
4175         cnt = 0;
4176         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4177                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4178                 SCTP_INP_READ_LOCK(inp);
4179                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4180                         if (sq->stcb == stcb) {
4181                                 sq->do_not_ref_stcb = 1;
4182                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4183                                 /*
4184                                  * If there is no end, there never will be
4185                                  * now.
4186                                  */
4187                                 if (sq->end_added == 0) {
4188                                         /* Held for PD-API clear that. */
4189                                         sq->pdapi_aborted = 1;
4190                                         sq->held_length = 0;
4191                                         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4192                                                 /*
4193                                                  * Need to add a PD-API
4194                                                  * aborted indication.
4195                                                  * Setting the control_pdapi
4196                                                  * assures that it will be
4197                                                  * added right after this
4198                                                  * msg.
4199                                                  */
4200                                                 uint32_t strseq;
4201
4202                                                 stcb->asoc.control_pdapi = sq;
4203                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4204                                                 sctp_notify_partial_delivery_indication(stcb,
4205                                                     SCTP_PARTIAL_DELIVERY_ABORTED, 1, strseq);
4206                                                 stcb->asoc.control_pdapi = NULL;
4207                                         }
4208                                 }
4209                                 /* Add an end to wake them */
4210                                 sq->end_added = 1;
4211                                 cnt++;
4212                         }
4213                 }
4214                 SCTP_INP_READ_UNLOCK(inp);
4215                 if (stcb->block_entry) {
4216                         cnt++;
4217                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4218                         stcb->block_entry->error = ECONNRESET;
4219                         stcb->block_entry = NULL;
4220                 }
4221         }
4222         if (stcb->asoc.refcnt) {
4223                 /*
4224                  * reader or writer in the way, we have hopefully given him
4225                  * something to chew on above.
4226                  */
4227                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4228                 SCTP_TCB_UNLOCK(stcb);
4229                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4230                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4231                         /* nothing around */
4232                         so = NULL;
4233                 if (so) {
4234                         /* Wake any reader/writers */
4235                         sctp_sorwakeup(inp, so);
4236                         sctp_sowwakeup(inp, so);
4237                 }
4238 #ifdef SCTP_LOG_CLOSING
4239                 sctp_log_closing(inp, stcb, 9);
4240 #endif
4241                 /* no asoc destroyed */
4242                 return (0);
4243         }
4244 #ifdef SCTP_LOG_CLOSING
4245         sctp_log_closing(inp, stcb, 10);
4246 #endif
4247         /*
4248          * When I reach here, no others want to kill the assoc yet.. and I
4249          * own the lock. Now its possible an abort comes in when I do the
4250          * lock exchange below to grab all the locks to do the final take
4251          * out. to prevent this we increment the count, which will start a
4252          * timer and blow out above thus assuring us that we hold exclusive
4253          * killing of the asoc. Note that after getting back the TCB lock we
4254          * will go ahead and increment the counter back up and stop any
4255          * timer a passing stranger may have started :-S
4256          */
4257         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4258                 atomic_add_int(&stcb->asoc.refcnt, 1);
4259
4260                 SCTP_TCB_UNLOCK(stcb);
4261
4262                 SCTP_ITERATOR_LOCK();
4263                 SCTP_INP_INFO_WLOCK();
4264                 SCTP_INP_WLOCK(inp);
4265                 SCTP_TCB_LOCK(stcb);
4266         }
4267         /* Double check the GONE flag */
4268         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4269             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4270                 /* nothing around */
4271                 so = NULL;
4272
4273         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4274             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4275                 /*
4276                  * For TCP type we need special handling when we are
4277                  * connected. We also include the peel'ed off ones to.
4278                  */
4279                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4280                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4281                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4282                         if (so) {
4283                                 SOCK_LOCK(so);
4284                                 if (so->so_rcv.sb_cc == 0) {
4285                                         so->so_state &= ~(SS_ISCONNECTING |
4286                                             SS_ISDISCONNECTING |
4287                                             SS_ISCONFIRMING |
4288                                             SS_ISCONNECTED);
4289                                 }
4290                                 SOCK_UNLOCK(so);
4291                                 socantrcvmore(so);
4292                                 sctp_sowwakeup(inp, so);
4293                                 sctp_sorwakeup(inp, so);
4294                                 SCTP_SOWAKEUP(so);
4295                         }
4296                 }
4297         }
4298         /*
4299          * Make it invalid too, that way if its about to run it will abort
4300          * and return.
4301          */
4302         sctp_iterator_asoc_being_freed(inp, stcb);
4303         /* re-increment the lock */
4304         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4305                 atomic_add_int(&stcb->asoc.refcnt, -1);
4306         }
4307         asoc->state = 0;
4308         if (inp->sctp_tcbhash) {
4309                 LIST_REMOVE(stcb, sctp_tcbhash);
4310         }
4311         if (stcb->asoc.in_restart_hash) {
4312                 LIST_REMOVE(stcb, sctp_tcbrestarhash);
4313         }
4314         /* Now lets remove it from the list of ALL associations in the EP */
4315         LIST_REMOVE(stcb, sctp_tcblist);
4316         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4317                 SCTP_INP_INCR_REF(inp);
4318                 SCTP_INP_WUNLOCK(inp);
4319                 SCTP_ITERATOR_UNLOCK();
4320         }
4321         /* pull from vtag hash */
4322         LIST_REMOVE(stcb, sctp_asocs);
4323         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_TIME_WAIT);
4324
4325         /*
4326          * Now restop the timers to be sure - this is paranoia at is finest!
4327          */
4328         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4329         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4330         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4331         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4332         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4333         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4334         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4335         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4336         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4337                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4338                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4339                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4340         }
4341
4342         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4343         prev = NULL;
4344         /*
4345          * The chunk lists and such SHOULD be empty but we check them just
4346          * in case.
4347          */
4348         /* anything on the wheel needs to be removed */
4349         for (i = 0; i < asoc->streamoutcnt; i++) {
4350                 struct sctp_stream_out *outs;
4351
4352                 outs = &asoc->strmout[i];
4353                 /* now clean up any chunks here */
4354                 sp = TAILQ_FIRST(&outs->outqueue);
4355                 while (sp) {
4356                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4357                         if (sp->data) {
4358                                 sctp_m_freem(sp->data);
4359                                 sp->data = NULL;
4360                                 sp->tail_mbuf = NULL;
4361                         }
4362                         sctp_free_remote_addr(sp->net);
4363                         sctp_free_spbufspace(stcb, asoc, sp);
4364                         /* Free the zone stuff  */
4365                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_strmoq, sp);
4366                         SCTP_DECR_STRMOQ_COUNT();
4367                         /* sa_ignore FREED_MEMORY */
4368                         sp = TAILQ_FIRST(&outs->outqueue);
4369                 }
4370         }
4371
4372         /* sa_ignore FREED_MEMORY */
4373         while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) {
4374                 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp);
4375                 SCTP_FREE(liste, SCTP_M_STRESET);
4376         }
4377
4378         sq = TAILQ_FIRST(&asoc->pending_reply_queue);
4379         while (sq) {
4380                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4381                 if (sq->data) {
4382                         sctp_m_freem(sq->data);
4383                         sq->data = NULL;
4384                 }
4385                 sctp_free_remote_addr(sq->whoFrom);
4386                 sq->whoFrom = NULL;
4387                 sq->stcb = NULL;
4388                 /* Free the ctl entry */
4389                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq);
4390                 SCTP_DECR_READQ_COUNT();
4391                 /* sa_ignore FREED_MEMORY */
4392                 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
4393         }
4394
4395         chk = TAILQ_FIRST(&asoc->free_chunks);
4396         while (chk) {
4397                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4398                 if (chk->data) {
4399                         sctp_m_freem(chk->data);
4400                         chk->data = NULL;
4401                 }
4402                 ccnt++;
4403                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4404                 SCTP_DECR_CHK_COUNT();
4405                 atomic_subtract_int(&sctppcbinfo.ipi_free_chunks, 1);
4406                 asoc->free_chunk_cnt--;
4407                 /* sa_ignore FREED_MEMORY */
4408                 chk = TAILQ_FIRST(&asoc->free_chunks);
4409         }
4410         /* pending send queue SHOULD be empty */
4411         if (!TAILQ_EMPTY(&asoc->send_queue)) {
4412                 chk = TAILQ_FIRST(&asoc->send_queue);
4413                 while (chk) {
4414                         TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4415                         if (chk->data) {
4416                                 sctp_m_freem(chk->data);
4417                                 chk->data = NULL;
4418                         }
4419                         ccnt++;
4420                         sctp_free_remote_addr(chk->whoTo);
4421                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4422                         SCTP_DECR_CHK_COUNT();
4423                         /* sa_ignore FREED_MEMORY */
4424                         chk = TAILQ_FIRST(&asoc->send_queue);
4425                 }
4426         }
4427 /*
4428   if(ccnt) {
4429   printf("Freed %d from send_queue\n", ccnt);
4430   ccnt = 0;
4431   }
4432 */
4433         /* sent queue SHOULD be empty */
4434         if (!TAILQ_EMPTY(&asoc->sent_queue)) {
4435                 chk = TAILQ_FIRST(&asoc->sent_queue);
4436                 while (chk) {
4437                         TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4438                         if (chk->data) {
4439                                 sctp_m_freem(chk->data);
4440                                 chk->data = NULL;
4441                         }
4442                         ccnt++;
4443                         sctp_free_remote_addr(chk->whoTo);
4444                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4445                         SCTP_DECR_CHK_COUNT();
4446                         /* sa_ignore FREED_MEMORY */
4447                         chk = TAILQ_FIRST(&asoc->sent_queue);
4448                 }
4449         }
4450 /*
4451   if(ccnt) {
4452   printf("Freed %d from sent_queue\n", ccnt);
4453   ccnt = 0;
4454   }
4455 */
4456         /* control queue MAY not be empty */
4457         if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
4458                 chk = TAILQ_FIRST(&asoc->control_send_queue);
4459                 while (chk) {
4460                         TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4461                         if (chk->data) {
4462                                 sctp_m_freem(chk->data);
4463                                 chk->data = NULL;
4464                         }
4465                         ccnt++;
4466                         sctp_free_remote_addr(chk->whoTo);
4467                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4468                         SCTP_DECR_CHK_COUNT();
4469                         /* sa_ignore FREED_MEMORY */
4470                         chk = TAILQ_FIRST(&asoc->control_send_queue);
4471                 }
4472         }
4473 /*
4474   if(ccnt) {
4475   printf("Freed %d from ctrl_queue\n", ccnt);
4476   ccnt = 0;
4477   }
4478 */
4479         if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
4480                 chk = TAILQ_FIRST(&asoc->reasmqueue);
4481                 while (chk) {
4482                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
4483                         if (chk->data) {
4484                                 sctp_m_freem(chk->data);
4485                                 chk->data = NULL;
4486                         }
4487                         sctp_free_remote_addr(chk->whoTo);
4488                         ccnt++;
4489                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4490                         SCTP_DECR_CHK_COUNT();
4491                         /* sa_ignore FREED_MEMORY */
4492                         chk = TAILQ_FIRST(&asoc->reasmqueue);
4493                 }
4494         }
4495 /*
4496   if(ccnt) {
4497   printf("Freed %d from reasm_queue\n", ccnt);
4498   ccnt = 0;
4499   }
4500 */
4501         if (asoc->mapping_array) {
4502                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4503                 asoc->mapping_array = NULL;
4504         }
4505         /* the stream outs */
4506         if (asoc->strmout) {
4507                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4508                 asoc->strmout = NULL;
4509         }
4510         asoc->streamoutcnt = 0;
4511         if (asoc->strmin) {
4512                 struct sctp_queued_to_read *ctl;
4513
4514                 for (i = 0; i < asoc->streamincnt; i++) {
4515                         if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
4516                                 /* We have somethings on the streamin queue */
4517                                 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4518                                 while (ctl) {
4519                                         TAILQ_REMOVE(&asoc->strmin[i].inqueue,
4520                                             ctl, next);
4521                                         sctp_free_remote_addr(ctl->whoFrom);
4522                                         if (ctl->data) {
4523                                                 sctp_m_freem(ctl->data);
4524                                                 ctl->data = NULL;
4525                                         }
4526                                         /*
4527                                          * We don't free the address here
4528                                          * since all the net's were freed
4529                                          * above.
4530                                          */
4531                                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl);
4532                                         SCTP_DECR_READQ_COUNT();
4533                                         ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4534                                 }
4535                         }
4536                 }
4537                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
4538                 asoc->strmin = NULL;
4539         }
4540         asoc->streamincnt = 0;
4541         while (!TAILQ_EMPTY(&asoc->nets)) {
4542                 /* sa_ignore FREED_MEMORY */
4543                 net = TAILQ_FIRST(&asoc->nets);
4544                 /* pull from list */
4545                 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) {
4546 #ifdef INVARIANTS
4547                         panic("no net's left alloc'ed, or list points to itself");
4548 #endif
4549                         break;
4550                 }
4551                 prev = net;
4552                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4553                 sctp_free_remote_addr(net);
4554         }
4555
4556         while (!SCTP_LIST_EMPTY(&asoc->sctp_restricted_addrs)) {
4557                 /* sa_ignore FREED_MEMORY */
4558                 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs);
4559                 sctp_remove_laddr(laddr);
4560         }
4561
4562         /* pending asconf (address) parameters */
4563         while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
4564                 /* sa_ignore FREED_MEMORY */
4565                 aparam = TAILQ_FIRST(&asoc->asconf_queue);
4566                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
4567                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
4568         }
4569         while (!TAILQ_EMPTY(&asoc->asconf_ack_sent)) {
4570                 /* sa_ignore FREED_MEMORY */
4571                 aack = TAILQ_FIRST(&asoc->asconf_ack_sent);
4572                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
4573                 if (aack->data != NULL) {
4574                         sctp_m_freem(aack->data);
4575                 }
4576                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asconf_ack, aack);
4577         }
4578         /* clean up auth stuff */
4579         if (asoc->local_hmacs)
4580                 sctp_free_hmaclist(asoc->local_hmacs);
4581         if (asoc->peer_hmacs)
4582                 sctp_free_hmaclist(asoc->peer_hmacs);
4583
4584         if (asoc->local_auth_chunks)
4585                 sctp_free_chunklist(asoc->local_auth_chunks);
4586         if (asoc->peer_auth_chunks)
4587                 sctp_free_chunklist(asoc->peer_auth_chunks);
4588
4589         sctp_free_authinfo(&asoc->authinfo);
4590
4591         shared_key = LIST_FIRST(&asoc->shared_keys);
4592         while (shared_key) {
4593                 LIST_REMOVE(shared_key, next);
4594                 sctp_free_sharedkey(shared_key);
4595                 /* sa_ignore FREED_MEMORY */
4596                 shared_key = LIST_FIRST(&asoc->shared_keys);
4597         }
4598
4599         /* Insert new items here :> */
4600
4601         /* Get rid of LOCK */
4602         SCTP_TCB_LOCK_DESTROY(stcb);
4603         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4604         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4605                 SCTP_INP_INFO_WUNLOCK();
4606                 SCTP_INP_RLOCK(inp);
4607         }
4608 #ifdef SCTP_TRACK_FREED_ASOCS
4609         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4610                 /* now clean up the tasoc itself */
4611                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
4612                 SCTP_DECR_ASOC_COUNT();
4613         } else {
4614                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
4615         }
4616 #else
4617         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
4618         SCTP_DECR_ASOC_COUNT();
4619 #endif
4620         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4621                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4622                         /*
4623                          * If its NOT the inp_free calling us AND sctp_close
4624                          * as been called, we call back...
4625                          */
4626                         SCTP_INP_RUNLOCK(inp);
4627                         /*
4628                          * This will start the kill timer (if we are the
4629                          * lastone) since we hold an increment yet. But this
4630                          * is the only safe way to do this since otherwise
4631                          * if the socket closes at the same time we are here
4632                          * we might collide in the cleanup.
4633                          */
4634                         sctp_inpcb_free(inp,
4635                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
4636                             SCTP_CALLED_DIRECTLY_NOCMPSET);
4637                         SCTP_INP_DECR_REF(inp);
4638                         goto out_of;
4639                 } else {
4640                         /* The socket is still open. */
4641                         SCTP_INP_DECR_REF(inp);
4642                 }
4643         }
4644         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4645                 SCTP_INP_RUNLOCK(inp);
4646         }
4647 out_of:
4648         /* destroyed the asoc */
4649 #ifdef SCTP_LOG_CLOSING
4650         sctp_log_closing(inp, NULL, 11);
4651 #endif
4652         return (1);
4653 }
4654
4655
4656
4657 /*
4658  * determine if a destination is "reachable" based upon the addresses bound
4659  * to the current endpoint (e.g. only v4 or v6 currently bound)
4660  */
4661 /*
4662  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
4663  * assoc level v4/v6 flags, as the assoc *may* not have the same address
4664  * types bound as its endpoint
4665  */
4666 int
4667 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
4668 {
4669         struct sctp_inpcb *inp;
4670         int answer;
4671
4672         /*
4673          * No locks here, the TCB, in all cases is already locked and an
4674          * assoc is up. There is either a INP lock by the caller applied (in
4675          * asconf case when deleting an address) or NOT in the HB case,
4676          * however if HB then the INP increment is up and the INP will not
4677          * be removed (on top of the fact that we have a TCB lock). So we
4678          * only want to read the sctp_flags, which is either bound-all or
4679          * not.. no protection needed since once an assoc is up you can't be
4680          * changing your binding.
4681          */
4682         inp = stcb->sctp_ep;
4683         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4684                 /* if bound all, destination is not restricted */
4685                 /*
4686                  * RRS: Question during lock work: Is this correct? If you
4687                  * are bound-all you still might need to obey the V4--V6
4688                  * flags??? IMO this bound-all stuff needs to be removed!
4689                  */
4690                 return (1);
4691         }
4692         /* NOTE: all "scope" checks are done when local addresses are added */
4693         if (destaddr->sa_family == AF_INET6) {
4694                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
4695         } else if (destaddr->sa_family == AF_INET) {
4696                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
4697         } else {
4698                 /* invalid family, so it's unreachable */
4699                 answer = 0;
4700         }
4701         return (answer);
4702 }
4703
4704 /*
4705  * update the inp_vflags on an endpoint
4706  */
4707 static void
4708 sctp_update_ep_vflag(struct sctp_inpcb *inp)
4709 {
4710         struct sctp_laddr *laddr;
4711
4712         /* first clear the flag */
4713         inp->ip_inp.inp.inp_vflag = 0;
4714         /* set the flag based on addresses on the ep list */
4715         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4716                 if (laddr->ifa == NULL) {
4717                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
4718                             __FUNCTION__);
4719                         continue;
4720                 }
4721                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
4722                         continue;
4723                 }
4724                 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
4725                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
4726                 } else if (laddr->ifa->address.sa.sa_family == AF_INET) {
4727                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
4728                 }
4729         }
4730 }
4731
4732 /*
4733  * Add the address to the endpoint local address list There is nothing to be
4734  * done if we are bound to all addresses
4735  */
4736 void
4737 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
4738 {
4739         struct sctp_laddr *laddr;
4740         int fnd, error = 0;
4741
4742         fnd = 0;
4743
4744         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4745                 /* You are already bound to all. You have it already */
4746                 return;
4747         }
4748         if (ifa->address.sa.sa_family == AF_INET6) {
4749                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
4750                         /* Can't bind a non-useable addr. */
4751                         return;
4752                 }
4753         }
4754         /* first, is it already present? */
4755         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4756                 if (laddr->ifa == ifa) {
4757                         fnd = 1;
4758                         break;
4759                 }
4760         }
4761
4762         if (fnd == 0) {
4763                 /* Not in the ep list */
4764                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
4765                 if (error != 0)
4766                         return;
4767                 inp->laddr_count++;
4768                 /* update inp_vflag flags */
4769                 if (ifa->address.sa.sa_family == AF_INET6) {
4770                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
4771                 } else if (ifa->address.sa.sa_family == AF_INET) {
4772                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
4773                 }
4774         }
4775         return;
4776 }
4777
4778
4779 /*
4780  * select a new (hopefully reachable) destination net (should only be used
4781  * when we deleted an ep addr that is the only usable source address to reach
4782  * the destination net)
4783  */
4784 static void
4785 sctp_select_primary_destination(struct sctp_tcb *stcb)
4786 {
4787         struct sctp_nets *net;
4788
4789         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4790                 /* for now, we'll just pick the first reachable one we find */
4791                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
4792                         continue;
4793                 if (sctp_destination_is_reachable(stcb,
4794                     (struct sockaddr *)&net->ro._l_addr)) {
4795                         /* found a reachable destination */
4796                         stcb->asoc.primary_destination = net;
4797                 }
4798         }
4799         /* I can't there from here! ...we're gonna die shortly... */
4800 }
4801
4802
4803 /*
4804  * Delete the address from the endpoint local address list There is nothing
4805  * to be done if we are bound to all addresses
4806  */
4807 void
4808 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
4809 {
4810         struct sctp_laddr *laddr;
4811         int fnd;
4812
4813         fnd = 0;
4814         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4815                 /* You are already bound to all. You have it already */
4816                 return;
4817         }
4818         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4819                 if (laddr->ifa == ifa) {
4820                         fnd = 1;
4821                         break;
4822                 }
4823         }
4824         if (fnd && (inp->laddr_count < 2)) {
4825                 /* can't delete unless there are at LEAST 2 addresses */
4826                 return;
4827         }
4828         if (fnd) {
4829                 /*
4830                  * clean up any use of this address go through our
4831                  * associations and clear any last_used_address that match
4832                  * this one for each assoc, see if a new primary_destination
4833                  * is needed
4834                  */
4835                 struct sctp_tcb *stcb;
4836
4837                 /* clean up "next_addr_touse" */
4838                 if (inp->next_addr_touse == laddr)
4839                         /* delete this address */
4840                         inp->next_addr_touse = NULL;
4841
4842                 /* clean up "last_used_address" */
4843                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
4844                         struct sctp_nets *net;
4845
4846                         SCTP_TCB_LOCK(stcb);
4847                         if (stcb->asoc.last_used_address == laddr)
4848                                 /* delete this address */
4849                                 stcb->asoc.last_used_address = NULL;
4850                         /*
4851                          * Now spin through all the nets and purge any ref
4852                          * to laddr
4853                          */
4854                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4855                                 if (net->ro._s_addr &&
4856                                     (net->ro._s_addr->ifa == laddr->ifa)) {
4857                                         /* Yep, purge src address selected */
4858                                         sctp_rtentry_t *rt;
4859
4860                                         /* delete this address if cached */
4861                                         rt = net->ro.ro_rt;
4862                                         if (rt != NULL) {
4863                                                 RTFREE(rt);
4864                                                 net->ro.ro_rt = NULL;
4865                                         }
4866                                         sctp_free_ifa(net->ro._s_addr);
4867                                         net->ro._s_addr = NULL;
4868                                         net->src_addr_selected = 0;
4869                                 }
4870                         }
4871                         SCTP_TCB_UNLOCK(stcb);
4872                 }               /* for each tcb */
4873                 /* remove it from the ep list */
4874                 sctp_remove_laddr(laddr);
4875                 inp->laddr_count--;
4876                 /* update inp_vflag flags */
4877                 sctp_update_ep_vflag(inp);
4878         }
4879         return;
4880 }
4881
4882 /*
4883  * Add the address to the TCB local address restricted list.
4884  * This is a "pending" address list (eg. addresses waiting for an
4885  * ASCONF-ACK response) and cannot be used as a valid source address.
4886  */
4887 void
4888 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
4889 {
4890         struct sctp_inpcb *inp;
4891         struct sctp_laddr *laddr;
4892         struct sctpladdr *list;
4893
4894         /*
4895          * Assumes TCB is locked.. and possibly the INP. May need to
4896          * confirm/fix that if we need it and is not the case.
4897          */
4898         list = &stcb->asoc.sctp_restricted_addrs;
4899
4900         inp = stcb->sctp_ep;
4901         if (ifa->address.sa.sa_family == AF_INET6) {
4902                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
4903                         /* Can't bind a non-existent addr. */
4904                         return;
4905                 }
4906         }
4907         /* does the address already exist? */
4908         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
4909                 if (laddr->ifa == ifa) {
4910                         return;
4911                 }
4912         }
4913
4914         /* add to the list */
4915         (void)sctp_insert_laddr(list, ifa, 0);
4916         return;
4917 }
4918
4919 /*
4920  * insert an laddr entry with the given ifa for the desired list
4921  */
4922 int
4923 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
4924 {
4925         struct sctp_laddr *laddr;
4926
4927         laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
4928         if (laddr == NULL) {
4929                 /* out of memory? */
4930                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4931                 return (EINVAL);
4932         }
4933         SCTP_INCR_LADDR_COUNT();
4934         bzero(laddr, sizeof(*laddr));
4935         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
4936         laddr->ifa = ifa;
4937         laddr->action = act;
4938         atomic_add_int(&ifa->refcount, 1);
4939         /* insert it */
4940         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
4941
4942         return (0);
4943 }
4944
4945 /*
4946  * Remove an laddr entry from the local address list (on an assoc)
4947  */
4948 void
4949 sctp_remove_laddr(struct sctp_laddr *laddr)
4950 {
4951
4952         /* remove from the list */
4953         LIST_REMOVE(laddr, sctp_nxt_addr);
4954         sctp_free_ifa(laddr->ifa);
4955         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
4956         SCTP_DECR_LADDR_COUNT();
4957 }
4958
4959 /*
4960  * Remove a local address from the TCB local address restricted list
4961  */
4962 void
4963 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
4964 {
4965         struct sctp_inpcb *inp;
4966         struct sctp_laddr *laddr;
4967
4968         /*
4969          * This is called by asconf work. It is assumed that a) The TCB is
4970          * locked and b) The INP is locked. This is true in as much as I can
4971          * trace through the entry asconf code where I did these locks.
4972          * Again, the ASCONF code is a bit different in that it does lock
4973          * the INP during its work often times. This must be since we don't
4974          * want other proc's looking up things while what they are looking
4975          * up is changing :-D
4976          */
4977
4978         inp = stcb->sctp_ep;
4979         /* if subset bound and don't allow ASCONF's, can't delete last */
4980         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
4981             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
4982                 if (stcb->sctp_ep->laddr_count < 2) {
4983                         /* can't delete last address */
4984                         return;
4985                 }
4986         }
4987         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
4988                 /* remove the address if it exists */
4989                 if (laddr->ifa == NULL)
4990                         continue;
4991                 if (laddr->ifa == ifa) {
4992                         sctp_remove_laddr(laddr);
4993                         return;
4994                 }
4995         }
4996
4997         /* address not found! */
4998         return;
4999 }
5000
5001 static char sctp_pcb_initialized = 0;
5002
5003 /*
5004  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5005  */
5006 /* sysctl */
5007 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5008 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5009
5010 void
5011 sctp_pcb_init()
5012 {
5013         /*
5014          * SCTP initialization for the PCB structures should be called by
5015          * the sctp_init() funciton.
5016          */
5017         int i;
5018         struct timeval tv;
5019
5020         if (sctp_pcb_initialized != 0) {
5021                 /* error I was called twice */
5022                 return;
5023         }
5024         sctp_pcb_initialized = 1;
5025
5026         bzero(&sctpstat, sizeof(struct sctpstat));
5027 #if defined(SCTP_LOCAL_TRACE_BUF)
5028         bzero(&sctp_log, sizeof(struct sctp_log));
5029 #endif
5030         (void)SCTP_GETTIME_TIMEVAL(&tv);
5031         sctpstat.sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5032         sctpstat.sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5033         /* init the empty list of (All) Endpoints */
5034         LIST_INIT(&sctppcbinfo.listhead);
5035
5036         /* init the iterator head */
5037         TAILQ_INIT(&sctppcbinfo.iteratorhead);
5038
5039         /* init the hash table of endpoints */
5040         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &sctp_hashtblsize);
5041         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize);
5042         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale);
5043         sctppcbinfo.sctp_asochash = SCTP_HASH_INIT((sctp_hashtblsize * 31),
5044             &sctppcbinfo.hashasocmark);
5045         sctppcbinfo.sctp_ephash = SCTP_HASH_INIT(sctp_hashtblsize,
5046             &sctppcbinfo.hashmark);
5047         sctppcbinfo.sctp_tcpephash = SCTP_HASH_INIT(sctp_hashtblsize,
5048             &sctppcbinfo.hashtcpmark);
5049         sctppcbinfo.hashtblsize = sctp_hashtblsize;
5050
5051         /* init the small hash table we use to track restarted asoc's */
5052         sctppcbinfo.sctp_restarthash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE,
5053             &sctppcbinfo.hashrestartmark);
5054
5055
5056         sctppcbinfo.sctp_vrfhash = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5057             &sctppcbinfo.hashvrfmark);
5058
5059         sctppcbinfo.vrf_ifn_hash = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5060             &sctppcbinfo.vrf_ifn_hashmark);
5061
5062         /* init the zones */
5063         /*
5064          * FIX ME: Should check for NULL returns, but if it does fail we are
5065          * doomed to panic anyways... add later maybe.
5066          */
5067         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_ep, "sctp_ep",
5068             sizeof(struct sctp_inpcb), maxsockets);
5069
5070         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc",
5071             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5072
5073         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr",
5074             sizeof(struct sctp_laddr),
5075             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5076
5077         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr",
5078             sizeof(struct sctp_nets),
5079             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5080
5081         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk",
5082             sizeof(struct sctp_tmit_chunk),
5083             (sctp_max_number_of_assoc * sctp_chunkscale));
5084
5085         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_readq, "sctp_readq",
5086             sizeof(struct sctp_queued_to_read),
5087             (sctp_max_number_of_assoc * sctp_chunkscale));
5088
5089         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_strmoq, "sctp_stream_msg_out",
5090             sizeof(struct sctp_stream_queue_pending),
5091             (sctp_max_number_of_assoc * sctp_chunkscale));
5092
5093         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asconf_ack, "sctp_asconf_ack",
5094             sizeof(struct sctp_asconf_ack),
5095             (sctp_max_number_of_assoc * sctp_chunkscale));
5096
5097
5098         /* Master Lock INIT for info structure */
5099         SCTP_INP_INFO_LOCK_INIT();
5100         SCTP_STATLOG_INIT_LOCK();
5101         SCTP_ITERATOR_LOCK_INIT();
5102
5103         SCTP_IPI_COUNT_INIT();
5104         SCTP_IPI_ADDR_INIT();
5105         SCTP_IPI_ITERATOR_WQ_INIT();
5106 #ifdef SCTP_PACKET_LOGGING
5107         SCTP_IP_PKTLOG_INIT();
5108 #endif
5109         LIST_INIT(&sctppcbinfo.addr_wq);
5110
5111         /* not sure if we need all the counts */
5112         sctppcbinfo.ipi_count_ep = 0;
5113         /* assoc/tcb zone info */
5114         sctppcbinfo.ipi_count_asoc = 0;
5115         /* local addrlist zone info */
5116         sctppcbinfo.ipi_count_laddr = 0;
5117         /* remote addrlist zone info */
5118         sctppcbinfo.ipi_count_raddr = 0;
5119         /* chunk info */
5120         sctppcbinfo.ipi_count_chunk = 0;
5121
5122         /* socket queue zone info */
5123         sctppcbinfo.ipi_count_readq = 0;
5124
5125         /* stream out queue cont */
5126         sctppcbinfo.ipi_count_strmoq = 0;
5127
5128         sctppcbinfo.ipi_free_strmoq = 0;
5129         sctppcbinfo.ipi_free_chunks = 0;
5130
5131         SCTP_OS_TIMER_INIT(&sctppcbinfo.addr_wq_timer.timer);
5132
5133         /* Init the TIMEWAIT list */
5134         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE_A; i++) {
5135                 LIST_INIT(&sctppcbinfo.vtag_timewait[i]);
5136         }
5137
5138 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
5139         sctppcbinfo.iterator_running = 0;
5140         sctp_startup_iterator();
5141 #endif
5142
5143         /*
5144          * INIT the default VRF which for BSD is the only one, other O/S's
5145          * may have more. But initially they must start with one and then
5146          * add the VRF's as addresses are added.
5147          */
5148         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5149
5150 }
5151
5152
5153 int
5154 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5155     int iphlen, int offset, int limit, struct sctphdr *sh,
5156     struct sockaddr *altsa)
5157 {
5158         /*
5159          * grub through the INIT pulling addresses and loading them to the
5160          * nets structure in the asoc. The from address in the mbuf should
5161          * also be loaded (if it is not already). This routine can be called
5162          * with either INIT or INIT-ACK's as long as the m points to the IP
5163          * packet and the offset points to the beginning of the parameters.
5164          */
5165         struct sctp_inpcb *inp, *l_inp;
5166         struct sctp_nets *net, *net_tmp;
5167         struct ip *iph;
5168         struct sctp_paramhdr *phdr, parm_buf;
5169         struct sctp_tcb *stcb_tmp;
5170         uint16_t ptype, plen;
5171         struct sockaddr *sa;
5172         struct sockaddr_storage dest_store;
5173         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
5174         struct sockaddr_in sin;
5175         struct sockaddr_in6 sin6;
5176         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
5177         struct sctp_auth_random *p_random = NULL;
5178         uint16_t random_len = 0;
5179         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
5180         struct sctp_auth_hmac_algo *hmacs = NULL;
5181         uint16_t hmacs_len = 0;
5182         uint8_t saw_asconf = 0;
5183         uint8_t saw_asconf_ack = 0;
5184         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
5185         struct sctp_auth_chunk_list *chunks = NULL;
5186         uint16_t num_chunks = 0;
5187         sctp_key_t *new_key;
5188         uint32_t keylen;
5189         int got_random = 0, got_hmacs = 0, got_chklist = 0;
5190
5191         /* First get the destination address setup too. */
5192         memset(&sin, 0, sizeof(sin));
5193         memset(&sin6, 0, sizeof(sin6));
5194
5195         sin.sin_family = AF_INET;
5196         sin.sin_len = sizeof(sin);
5197         sin.sin_port = stcb->rport;
5198
5199         sin6.sin6_family = AF_INET6;
5200         sin6.sin6_len = sizeof(struct sockaddr_in6);
5201         sin6.sin6_port = stcb->rport;
5202         if (altsa == NULL) {
5203                 iph = mtod(m, struct ip *);
5204                 if (iph->ip_v == IPVERSION) {
5205                         /* its IPv4 */
5206                         struct sockaddr_in *sin_2;
5207
5208                         sin_2 = (struct sockaddr_in *)(local_sa);
5209                         memset(sin_2, 0, sizeof(sin));
5210                         sin_2->sin_family = AF_INET;
5211                         sin_2->sin_len = sizeof(sin);
5212                         sin_2->sin_port = sh->dest_port;
5213                         sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
5214                         sin.sin_addr = iph->ip_src;
5215                         sa = (struct sockaddr *)&sin;
5216                 } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
5217                         /* its IPv6 */
5218                         struct ip6_hdr *ip6;
5219                         struct sockaddr_in6 *sin6_2;
5220
5221                         ip6 = mtod(m, struct ip6_hdr *);
5222                         sin6_2 = (struct sockaddr_in6 *)(local_sa);
5223                         memset(sin6_2, 0, sizeof(sin6));
5224                         sin6_2->sin6_family = AF_INET6;
5225                         sin6_2->sin6_len = sizeof(struct sockaddr_in6);
5226                         sin6_2->sin6_port = sh->dest_port;
5227                         sin6.sin6_addr = ip6->ip6_src;
5228                         sa = (struct sockaddr *)&sin6;
5229                 } else {
5230                         sa = NULL;
5231                 }
5232         } else {
5233                 /*
5234                  * For cookies we use the src address NOT from the packet
5235                  * but from the original INIT
5236                  */
5237                 sa = altsa;
5238         }
5239         /* Turn off ECN until we get through all params */
5240         stcb->asoc.ecn_allowed = 0;
5241         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5242                 /* mark all addresses that we have currently on the list */
5243                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
5244         }
5245         /* does the source address already exist? if so skip it */
5246         l_inp = inp = stcb->sctp_ep;
5247
5248         atomic_add_int(&stcb->asoc.refcnt, 1);
5249         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
5250         atomic_add_int(&stcb->asoc.refcnt, -1);
5251
5252         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
5253                 /* we must add the source address */
5254                 /* no scope set here since we have a tcb already. */
5255                 if ((sa->sa_family == AF_INET) &&
5256                     (stcb->asoc.ipv4_addr_legal)) {
5257                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
5258                                 return (-1);
5259                         }
5260                 } else if ((sa->sa_family == AF_INET6) &&
5261                     (stcb->asoc.ipv6_addr_legal)) {
5262                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
5263                                 return (-2);
5264                         }
5265                 }
5266         } else {
5267                 if (net_tmp != NULL && stcb_tmp == stcb) {
5268                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
5269                 } else if (stcb_tmp != stcb) {
5270                         /* It belongs to another association? */
5271                         if (stcb_tmp)
5272                                 SCTP_TCB_UNLOCK(stcb_tmp);
5273                         return (-3);
5274                 }
5275         }
5276         if (stcb->asoc.state == 0) {
5277                 /* the assoc was freed? */
5278                 return (-4);
5279         }
5280         /*
5281          * peer must explicitly turn this on. This may have been initialized
5282          * to be "on" in order to allow local addr changes while INIT's are
5283          * in flight.
5284          */
5285         stcb->asoc.peer_supports_asconf = 0;
5286         /* now we must go through each of the params. */
5287         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
5288         while (phdr) {
5289                 ptype = ntohs(phdr->param_type);
5290                 plen = ntohs(phdr->param_length);
5291                 /*
5292                  * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
5293                  * (int)plen);
5294                  */
5295                 if (offset + plen > limit) {
5296                         break;
5297                 }
5298                 if (plen == 0) {
5299                         break;
5300                 }
5301                 if (ptype == SCTP_IPV4_ADDRESS) {
5302                         if (stcb->asoc.ipv4_addr_legal) {
5303                                 struct sctp_ipv4addr_param *p4, p4_buf;
5304
5305                                 /* ok get the v4 address and check/add */
5306                                 phdr = sctp_get_next_param(m, offset,
5307                                     (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5308                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5309                                     phdr == NULL) {
5310                                         return (-5);
5311                                 }
5312                                 p4 = (struct sctp_ipv4addr_param *)phdr;
5313                                 sin.sin_addr.s_addr = p4->addr;
5314                                 if (IN_MULTICAST(sin.sin_addr.s_addr)) {
5315                                         /* Skip multi-cast addresses */
5316                                         goto next_param;
5317                                 }
5318                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
5319                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
5320                                         goto next_param;
5321                                 }
5322                                 sa = (struct sockaddr *)&sin;
5323                                 inp = stcb->sctp_ep;
5324                                 atomic_add_int(&stcb->asoc.refcnt, 1);
5325                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
5326                                     local_sa, stcb);
5327                                 atomic_add_int(&stcb->asoc.refcnt, -1);
5328
5329                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
5330                                     inp == NULL) {
5331                                         /* we must add the source address */
5332                                         /*
5333                                          * no scope set since we have a tcb
5334                                          * already
5335                                          */
5336
5337                                         /*
5338                                          * we must validate the state again
5339                                          * here
5340                                          */
5341                                         if (stcb->asoc.state == 0) {
5342                                                 /* the assoc was freed? */
5343                                                 return (-7);
5344                                         }
5345                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
5346                                                 return (-8);
5347                                         }
5348                                 } else if (stcb_tmp == stcb) {
5349                                         if (stcb->asoc.state == 0) {
5350                                                 /* the assoc was freed? */
5351                                                 return (-10);
5352                                         }
5353                                         if (net != NULL) {
5354                                                 /* clear flag */
5355                                                 net->dest_state &=
5356                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
5357                                         }
5358                                 } else {
5359                                         /*
5360                                          * strange, address is in another
5361                                          * assoc? straighten out locks.
5362                                          */
5363                                         if (stcb_tmp)
5364                                                 SCTP_TCB_UNLOCK(stcb_tmp);
5365
5366                                         if (stcb->asoc.state == 0) {
5367                                                 /* the assoc was freed? */
5368                                                 return (-12);
5369                                         }
5370                                         return (-13);
5371                                 }
5372                         }
5373                 } else if (ptype == SCTP_IPV6_ADDRESS) {
5374                         if (stcb->asoc.ipv6_addr_legal) {
5375                                 /* ok get the v6 address and check/add */
5376                                 struct sctp_ipv6addr_param *p6, p6_buf;
5377
5378                                 phdr = sctp_get_next_param(m, offset,
5379                                     (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5380                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5381                                     phdr == NULL) {
5382                                         return (-14);
5383                                 }
5384                                 p6 = (struct sctp_ipv6addr_param *)phdr;
5385                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5386                                     sizeof(p6->addr));
5387                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
5388                                         /* Skip multi-cast addresses */
5389                                         goto next_param;
5390                                 }
5391                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
5392                                         /*
5393                                          * Link local make no sense without
5394                                          * scope
5395                                          */
5396                                         goto next_param;
5397                                 }
5398                                 sa = (struct sockaddr *)&sin6;
5399                                 inp = stcb->sctp_ep;
5400                                 atomic_add_int(&stcb->asoc.refcnt, 1);
5401                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
5402                                     local_sa, stcb);
5403                                 atomic_add_int(&stcb->asoc.refcnt, -1);
5404                                 if (stcb_tmp == NULL && (inp == stcb->sctp_ep ||
5405                                     inp == NULL)) {
5406                                         /*
5407                                          * we must validate the state again
5408                                          * here
5409                                          */
5410                                         if (stcb->asoc.state == 0) {
5411                                                 /* the assoc was freed? */
5412                                                 return (-16);
5413                                         }
5414                                         /*
5415                                          * we must add the address, no scope
5416                                          * set
5417                                          */
5418                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
5419                                                 return (-17);
5420                                         }
5421                                 } else if (stcb_tmp == stcb) {
5422                                         /*
5423                                          * we must validate the state again
5424                                          * here
5425                                          */
5426                                         if (stcb->asoc.state == 0) {
5427                                                 /* the assoc was freed? */
5428                                                 return (-19);
5429                                         }
5430                                         if (net != NULL) {
5431                                                 /* clear flag */
5432                                                 net->dest_state &=
5433                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
5434                                         }
5435                                 } else {
5436                                         /*
5437                                          * strange, address is in another
5438                                          * assoc? straighten out locks.
5439                                          */
5440                                         if (stcb_tmp)
5441                                                 SCTP_TCB_UNLOCK(stcb_tmp);
5442
5443                                         if (stcb->asoc.state == 0) {
5444                                                 /* the assoc was freed? */
5445                                                 return (-21);
5446                                         }
5447                                         return (-22);
5448                                 }
5449                         }
5450                 } else if (ptype == SCTP_ECN_CAPABLE) {
5451                         stcb->asoc.ecn_allowed = 1;
5452                 } else if (ptype == SCTP_ULP_ADAPTATION) {
5453                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
5454                                 struct sctp_adaptation_layer_indication ai,
5455                                                                 *aip;
5456
5457                                 phdr = sctp_get_next_param(m, offset,
5458                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
5459                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
5460                                 if (aip) {
5461                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
5462                                         stcb->asoc.adaptation_needed = 1;
5463                                 }
5464                         }
5465                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
5466                         struct sctp_asconf_addr_param lstore, *fee;
5467                         struct sctp_asconf_addrv4_param *fii;
5468                         int lptype;
5469                         struct sockaddr *lsa = NULL;
5470
5471                         stcb->asoc.peer_supports_asconf = 1;
5472                         if (plen > sizeof(lstore)) {
5473                                 return (-23);
5474                         }
5475                         phdr = sctp_get_next_param(m, offset,
5476                             (struct sctp_paramhdr *)&lstore, min(plen, sizeof(lstore)));
5477                         if (phdr == NULL) {
5478                                 return (-24);
5479                         }
5480                         fee = (struct sctp_asconf_addr_param *)phdr;
5481                         lptype = ntohs(fee->addrp.ph.param_type);
5482                         if (lptype == SCTP_IPV4_ADDRESS) {
5483                                 if (plen !=
5484                                     sizeof(struct sctp_asconf_addrv4_param)) {
5485                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
5486                                             (int)sizeof(struct sctp_asconf_addrv4_param),
5487                                             plen);
5488                                 } else {
5489                                         fii = (struct sctp_asconf_addrv4_param *)fee;
5490                                         sin.sin_addr.s_addr = fii->addrp.addr;
5491                                         lsa = (struct sockaddr *)&sin;
5492                                 }
5493                         } else if (lptype == SCTP_IPV6_ADDRESS) {
5494                                 if (plen !=
5495                                     sizeof(struct sctp_asconf_addr_param)) {
5496                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
5497                                             (int)sizeof(struct sctp_asconf_addr_param),
5498                                             plen);
5499                                 } else {
5500                                         memcpy(sin6.sin6_addr.s6_addr,
5501                                             fee->addrp.addr,
5502                                             sizeof(fee->addrp.addr));
5503                                         lsa = (struct sockaddr *)&sin6;
5504                                 }
5505                         }
5506                         if (lsa) {
5507                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
5508                         }
5509                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
5510                         /* Peer supports pr-sctp */
5511                         stcb->asoc.peer_supports_prsctp = 1;
5512                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
5513                         /* A supported extension chunk */
5514                         struct sctp_supported_chunk_types_param *pr_supported;
5515                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
5516                         int num_ent, i;
5517
5518                         phdr = sctp_get_next_param(m, offset,
5519                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
5520                         if (phdr == NULL) {
5521                                 return (-25);
5522                         }
5523                         stcb->asoc.peer_supports_asconf = 0;
5524                         stcb->asoc.peer_supports_prsctp = 0;
5525                         stcb->asoc.peer_supports_pktdrop = 0;
5526                         stcb->asoc.peer_supports_strreset = 0;
5527                         stcb->asoc.peer_supports_auth = 0;
5528                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
5529                         num_ent = plen - sizeof(struct sctp_paramhdr);
5530                         for (i = 0; i < num_ent; i++) {
5531                                 switch (pr_supported->chunk_types[i]) {
5532                                 case SCTP_ASCONF:
5533                                 case SCTP_ASCONF_ACK:
5534                                         stcb->asoc.peer_supports_asconf = 1;
5535                                         break;
5536                                 case SCTP_FORWARD_CUM_TSN:
5537                                         stcb->asoc.peer_supports_prsctp = 1;
5538                                         break;
5539                                 case SCTP_PACKET_DROPPED:
5540                                         stcb->asoc.peer_supports_pktdrop = 1;
5541                                         break;
5542                                 case SCTP_STREAM_RESET:
5543                                         stcb->asoc.peer_supports_strreset = 1;
5544                                         break;
5545                                 case SCTP_AUTHENTICATION:
5546                                         stcb->asoc.peer_supports_auth = 1;
5547                                         break;
5548                                 default:
5549                                         /* one I have not learned yet */
5550                                         break;
5551
5552                                 }
5553                         }
5554                 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
5555                         /* Peer supports ECN-nonce */
5556                         stcb->asoc.peer_supports_ecn_nonce = 1;
5557                         stcb->asoc.ecn_nonce_allowed = 1;
5558                 } else if (ptype == SCTP_RANDOM) {
5559                         if (plen > sizeof(random_store))
5560                                 break;
5561                         if (got_random) {
5562                                 /* already processed a RANDOM */
5563                                 goto next_param;
5564                         }
5565                         phdr = sctp_get_next_param(m, offset,
5566                             (struct sctp_paramhdr *)random_store,
5567                             min(sizeof(random_store), plen));
5568                         if (phdr == NULL)
5569                                 return (-26);
5570                         p_random = (struct sctp_auth_random *)phdr;
5571                         random_len = plen - sizeof(*p_random);
5572                         /* enforce the random length */
5573                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
5574                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
5575                                 return (-27);
5576                         }
5577                         got_random = 1;
5578                 } else if (ptype == SCTP_HMAC_LIST) {
5579                         int num_hmacs;
5580                         int i;
5581
5582                         if (plen > sizeof(hmacs_store))
5583                                 break;
5584                         if (got_hmacs) {
5585                                 /* already processed a HMAC list */
5586                                 goto next_param;
5587                         }
5588                         phdr = sctp_get_next_param(m, offset,
5589                             (struct sctp_paramhdr *)hmacs_store,
5590                             min(plen, sizeof(hmacs_store)));
5591                         if (phdr == NULL)
5592                                 return (-28);
5593                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
5594                         hmacs_len = plen - sizeof(*hmacs);
5595                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
5596                         /* validate the hmac list */
5597                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
5598                                 return (-29);
5599                         }
5600                         if (stcb->asoc.peer_hmacs != NULL)
5601                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
5602                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
5603                         if (stcb->asoc.peer_hmacs != NULL) {
5604                                 for (i = 0; i < num_hmacs; i++) {
5605                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
5606                                             ntohs(hmacs->hmac_ids[i]));
5607                                 }
5608                         }
5609                         got_hmacs = 1;
5610                 } else if (ptype == SCTP_CHUNK_LIST) {
5611                         int i;
5612
5613                         if (plen > sizeof(chunks_store))
5614                                 break;
5615                         if (got_chklist) {
5616                                 /* already processed a Chunks list */
5617                                 goto next_param;
5618                         }
5619                         phdr = sctp_get_next_param(m, offset,
5620                             (struct sctp_paramhdr *)chunks_store,
5621                             min(plen, sizeof(chunks_store)));
5622                         if (phdr == NULL)
5623                                 return (-30);
5624                         chunks = (struct sctp_auth_chunk_list *)phdr;
5625                         num_chunks = plen - sizeof(*chunks);
5626                         if (stcb->asoc.peer_auth_chunks != NULL)
5627                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
5628                         else
5629                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
5630                         for (i = 0; i < num_chunks; i++) {
5631                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
5632                                     stcb->asoc.peer_auth_chunks);
5633                                 /* record asconf/asconf-ack if listed */
5634                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
5635                                         saw_asconf = 1;
5636                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
5637                                         saw_asconf_ack = 1;
5638
5639                         }
5640                         got_chklist = 1;
5641                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
5642                             (ptype == SCTP_STATE_COOKIE) ||
5643                             (ptype == SCTP_UNRECOG_PARAM) ||
5644                             (ptype == SCTP_COOKIE_PRESERVE) ||
5645                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
5646                             (ptype == SCTP_ADD_IP_ADDRESS) ||
5647                             (ptype == SCTP_DEL_IP_ADDRESS) ||
5648                             (ptype == SCTP_ERROR_CAUSE_IND) ||
5649                     (ptype == SCTP_SUCCESS_REPORT)) {
5650                          /* don't care */ ;
5651                 } else {
5652                         if ((ptype & 0x8000) == 0x0000) {
5653                                 /*
5654                                  * must stop processing the rest of the
5655                                  * param's. Any report bits were handled
5656                                  * with the call to
5657                                  * sctp_arethere_unrecognized_parameters()
5658                                  * when the INIT or INIT-ACK was first seen.
5659                                  */
5660                                 break;
5661                         }
5662                 }
5663 next_param:
5664                 offset += SCTP_SIZE32(plen);
5665                 if (offset >= limit) {
5666                         break;
5667                 }
5668                 phdr = sctp_get_next_param(m, offset, &parm_buf,
5669                     sizeof(parm_buf));
5670         }
5671         /* Now check to see if we need to purge any addresses */
5672         for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
5673                 net_tmp = TAILQ_NEXT(net, sctp_next);
5674                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
5675                     SCTP_ADDR_NOT_IN_ASSOC) {
5676                         /* This address has been removed from the asoc */
5677                         /* remove and free it */
5678                         stcb->asoc.numnets--;
5679                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
5680                         sctp_free_remote_addr(net);
5681                         if (net == stcb->asoc.primary_destination) {
5682                                 stcb->asoc.primary_destination = NULL;
5683                                 sctp_select_primary_destination(stcb);
5684                         }
5685                 }
5686         }
5687         /* validate authentication required parameters */
5688         if (got_random && got_hmacs) {
5689                 stcb->asoc.peer_supports_auth = 1;
5690         } else {
5691                 stcb->asoc.peer_supports_auth = 0;
5692         }
5693         if (!stcb->asoc.peer_supports_auth && got_chklist) {
5694                 /* peer does not support auth but sent a chunks list? */
5695                 return (-31);
5696         }
5697         if (!sctp_asconf_auth_nochk && stcb->asoc.peer_supports_asconf &&
5698             !stcb->asoc.peer_supports_auth) {
5699                 /* peer supports asconf but not auth? */
5700                 return (-32);
5701         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
5702             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
5703                 return (-33);
5704         }
5705         /* concatenate the full random key */
5706 #ifdef SCTP_AUTH_DRAFT_04
5707         keylen = random_len;
5708         new_key = sctp_alloc_key(keylen);
5709         if (new_key != NULL) {
5710                 /* copy in the RANDOM */
5711                 if (p_random != NULL)
5712                         bcopy(p_random->random_data, new_key->key, random_len);
5713         }
5714 #else
5715         keylen = sizeof(*p_random) + random_len + sizeof(*chunks) + num_chunks +
5716             sizeof(*hmacs) + hmacs_len;
5717         new_key = sctp_alloc_key(keylen);
5718         if (new_key != NULL) {
5719                 /* copy in the RANDOM */
5720                 if (p_random != NULL) {
5721                         keylen = sizeof(*p_random) + random_len;
5722                         bcopy(p_random, new_key->key, keylen);
5723                 }
5724                 /* append in the AUTH chunks */
5725                 if (chunks != NULL) {
5726                         bcopy(chunks, new_key->key + keylen,
5727                             sizeof(*chunks) + num_chunks);
5728                         keylen += sizeof(*chunks) + num_chunks;
5729                 }
5730                 /* append in the HMACs */
5731                 if (hmacs != NULL) {
5732                         bcopy(hmacs, new_key->key + keylen,
5733                             sizeof(*hmacs) + hmacs_len);
5734                 }
5735         }
5736 #endif
5737         else {
5738                 /* failed to get memory for the key */
5739                 return (-34);
5740         }
5741         if (stcb->asoc.authinfo.peer_random != NULL)
5742                 sctp_free_key(stcb->asoc.authinfo.peer_random);
5743         stcb->asoc.authinfo.peer_random = new_key;
5744 #ifdef SCTP_AUTH_DRAFT_04
5745         /* don't include the chunks and hmacs for draft -04 */
5746         stcb->asoc.authinfo.peer_random->keylen = random_len;
5747 #endif
5748         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
5749         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
5750
5751         return (0);
5752 }
5753
5754 int
5755 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
5756     struct sctp_nets *net)
5757 {
5758         /* make sure the requested primary address exists in the assoc */
5759         if (net == NULL && sa)
5760                 net = sctp_findnet(stcb, sa);
5761
5762         if (net == NULL) {
5763                 /* didn't find the requested primary address! */
5764                 return (-1);
5765         } else {
5766                 /* set the primary address */
5767                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
5768                         /* Must be confirmed, so queue to set */
5769                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
5770                         return (0);
5771                 }
5772                 stcb->asoc.primary_destination = net;
5773                 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
5774                 net = TAILQ_FIRST(&stcb->asoc.nets);
5775                 if (net != stcb->asoc.primary_destination) {
5776                         /*
5777                          * first one on the list is NOT the primary
5778                          * sctp_cmpaddr() is much more efficent if the
5779                          * primary is the first on the list, make it so.
5780                          */
5781                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
5782                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
5783                 }
5784                 return (0);
5785         }
5786 }
5787
5788 int
5789 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, struct timeval *now, int save_in_twait)
5790 {
5791         /*
5792          * This function serves two purposes. It will see if a TAG can be
5793          * re-used and return 1 for yes it is ok and 0 for don't use that
5794          * tag. A secondary function it will do is purge out old tags that
5795          * can be removed.
5796          */
5797         struct sctpasochead *head;
5798         struct sctpvtaghead *chain;
5799         struct sctp_tagblock *twait_block;
5800         struct sctp_tcb *stcb;
5801         int i;
5802
5803         SCTP_INP_INFO_WLOCK();
5804         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
5805         /* First is the vtag in use ? */
5806
5807         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag,
5808             sctppcbinfo.hashasocmark)];
5809         if (head == NULL) {
5810                 goto check_restart;
5811         }
5812         LIST_FOREACH(stcb, head, sctp_asocs) {
5813
5814                 if (stcb->asoc.my_vtag == tag) {
5815                         /*
5816                          * We should remove this if and return 0 always if
5817                          * we want vtags unique across all endpoints. For
5818                          * now within a endpoint is ok.
5819                          */
5820                         if (inp == stcb->sctp_ep) {
5821                                 /* bad tag, in use */
5822                                 SCTP_INP_INFO_WUNLOCK();
5823                                 return (0);
5824                         }
5825                 }
5826         }
5827 check_restart:
5828         /* Now lets check the restart hash */
5829         head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(tag,
5830             sctppcbinfo.hashrestartmark)];
5831         if (head == NULL) {
5832                 goto check_time_wait;
5833         }
5834         LIST_FOREACH(stcb, head, sctp_tcbrestarhash) {
5835                 if (stcb->asoc.assoc_id == tag) {
5836                         /* candidate */
5837                         if (inp == stcb->sctp_ep) {
5838                                 /* bad tag, in use */
5839                                 SCTP_INP_INFO_WUNLOCK();
5840                                 return (0);
5841                         }
5842                 }
5843         }
5844 check_time_wait:
5845         /* Now what about timed wait ? */
5846         if (!SCTP_LIST_EMPTY(chain)) {
5847                 /*
5848                  * Block(s) are present, lets see if we have this tag in the
5849                  * list
5850                  */
5851                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5852                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
5853                                 if (twait_block->vtag_block[i].v_tag == 0) {
5854                                         /* not used */
5855                                         continue;
5856                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
5857                                     now->tv_sec) {
5858                                         /* Audit expires this guy */
5859                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
5860                                         twait_block->vtag_block[i].v_tag = 0;
5861                                 } else if (twait_block->vtag_block[i].v_tag ==
5862                                     tag) {
5863                                         /* Bad tag, sorry :< */
5864                                         SCTP_INP_INFO_WUNLOCK();
5865                                         return (0);
5866                                 }
5867                         }
5868                 }
5869         }
5870         /*-
5871          * Not found, ok to use the tag, add it to the time wait hash
5872          * as well this will prevent two sucessive cookies from getting
5873          * the same tag or two inits sent quickly on multi-processors.
5874          * We only keep the tag for the life of a cookie and when we
5875          * add this tag to the assoc hash we need to purge it from
5876          * the t-wait hash.
5877          */
5878         if (save_in_twait)
5879                 sctp_add_vtag_to_timewait(tag, TICKS_TO_SEC(inp->sctp_ep.def_cookie_life));
5880         SCTP_INP_INFO_WUNLOCK();
5881         return (1);
5882 }
5883
5884
5885 static sctp_assoc_t reneged_asoc_ids[256];
5886 static uint8_t reneged_at = 0;
5887
5888
5889 static void
5890 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
5891 {
5892         /*
5893          * We must hunt this association for MBUF's past the cumack (i.e.
5894          * out of order data that we can renege on).
5895          */
5896         struct sctp_association *asoc;
5897         struct sctp_tmit_chunk *chk, *nchk;
5898         uint32_t cumulative_tsn_p1, tsn;
5899         struct sctp_queued_to_read *ctl, *nctl;
5900         int cnt, strmat, gap;
5901
5902         /* We look for anything larger than the cum-ack + 1 */
5903
5904         SCTP_STAT_INCR(sctps_protocol_drain_calls);
5905         if (sctp_do_drain == 0) {
5906                 return;
5907         }
5908         asoc = &stcb->asoc;
5909         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
5910                 /* none we can reneg on. */
5911                 return;
5912         }
5913         SCTP_STAT_INCR(sctps_protocol_drains_done);
5914         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
5915         cnt = 0;
5916         /* First look in the re-assembly queue */
5917         chk = TAILQ_FIRST(&asoc->reasmqueue);
5918         while (chk) {
5919                 /* Get the next one */
5920                 nchk = TAILQ_NEXT(chk, sctp_next);
5921                 if (compare_with_wrap(chk->rec.data.TSN_seq,
5922                     cumulative_tsn_p1, MAX_TSN)) {
5923                         /* Yep it is above cum-ack */
5924                         cnt++;
5925                         tsn = chk->rec.data.TSN_seq;
5926                         if (tsn >= asoc->mapping_array_base_tsn) {
5927                                 gap = tsn - asoc->mapping_array_base_tsn;
5928                         } else {
5929                                 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
5930                                     tsn + 1;
5931                         }
5932                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
5933                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
5934                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
5935                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5936                         if (chk->data) {
5937                                 sctp_m_freem(chk->data);
5938                                 chk->data = NULL;
5939                         }
5940                         sctp_free_a_chunk(stcb, chk);
5941                 }
5942                 chk = nchk;
5943         }
5944         /* Ok that was fun, now we will drain all the inbound streams? */
5945         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
5946                 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
5947                 while (ctl) {
5948                         nctl = TAILQ_NEXT(ctl, next);
5949                         if (compare_with_wrap(ctl->sinfo_tsn,
5950                             cumulative_tsn_p1, MAX_TSN)) {
5951                                 /* Yep it is above cum-ack */
5952                                 cnt++;
5953                                 tsn = ctl->sinfo_tsn;
5954                                 if (tsn >= asoc->mapping_array_base_tsn) {
5955                                         gap = tsn -
5956                                             asoc->mapping_array_base_tsn;
5957                                 } else {
5958                                         gap = (MAX_TSN -
5959                                             asoc->mapping_array_base_tsn) +
5960                                             tsn + 1;
5961                                 }
5962                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
5963                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
5964
5965                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array,
5966                                     gap);
5967                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue,
5968                                     ctl, next);
5969                                 if (ctl->data) {
5970                                         sctp_m_freem(ctl->data);
5971                                         ctl->data = NULL;
5972                                 }
5973                                 sctp_free_remote_addr(ctl->whoFrom);
5974                                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl);
5975                                 SCTP_DECR_READQ_COUNT();
5976                         }
5977                         ctl = nctl;
5978                 }
5979         }
5980         /*
5981          * Question, should we go through the delivery queue? The only
5982          * reason things are on here is the app not reading OR a p-d-api up.
5983          * An attacker COULD send enough in to initiate the PD-API and then
5984          * send a bunch of stuff to other streams... these would wind up on
5985          * the delivery queue.. and then we would not get to them. But in
5986          * order to do this I then have to back-track and un-deliver
5987          * sequence numbers in streams.. el-yucko. I think for now we will
5988          * NOT look at the delivery queue and leave it to be something to
5989          * consider later. An alternative would be to abort the P-D-API with
5990          * a notification and then deliver the data.... Or another method
5991          * might be to keep track of how many times the situation occurs and
5992          * if we see a possible attack underway just abort the association.
5993          */
5994 #ifdef SCTP_DEBUG
5995         if (cnt) {
5996                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
5997         }
5998 #endif
5999         if (cnt) {
6000                 /*
6001                  * Now do we need to find a new
6002                  * asoc->highest_tsn_inside_map?
6003                  */
6004                 if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) {
6005                         gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn;
6006                 } else {
6007                         gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
6008                             asoc->highest_tsn_inside_map + 1;
6009                 }
6010                 if (gap >= (asoc->mapping_array_size << 3)) {
6011                         /*
6012                          * Something bad happened or cum-ack and high were
6013                          * behind the base, but if so earlier checks should
6014                          * have found NO data... wierd... we will start at
6015                          * end of mapping array.
6016                          */
6017                         SCTP_PRINTF("Gap was larger than array?? %d set to max:%d maparraymax:%x\n",
6018                             (int)gap,
6019                             (int)(asoc->mapping_array_size << 3),
6020                             (int)asoc->highest_tsn_inside_map);
6021                         gap = asoc->mapping_array_size << 3;
6022                 }
6023                 while (gap > 0) {
6024                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6025                                 /* found the new highest */
6026                                 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap;
6027                                 break;
6028                         }
6029                         gap--;
6030                 }
6031                 if (gap == 0) {
6032                         /* Nothing left in map */
6033                         memset(asoc->mapping_array, 0, asoc->mapping_array_size);
6034                         asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1;
6035                         asoc->highest_tsn_inside_map = asoc->cumulative_tsn;
6036                 }
6037                 asoc->last_revoke_count = cnt;
6038                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6039                 /* sa_ignore NO_NULL_CHK */
6040                 sctp_send_sack(stcb);
6041                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6042                 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
6043                 reneged_at++;
6044         }
6045         /*
6046          * Another issue, in un-setting the TSN's in the mapping array we
6047          * DID NOT adjust the higest_tsn marker.  This will cause one of two
6048          * things to occur. It may cause us to do extra work in checking for
6049          * our mapping array movement. More importantly it may cause us to
6050          * SACK every datagram. This may not be a bad thing though since we
6051          * will recover once we get our cum-ack above and all this stuff we
6052          * dumped recovered.
6053          */
6054 }
6055
6056 void
6057 sctp_drain()
6058 {
6059         /*
6060          * We must walk the PCB lists for ALL associations here. The system
6061          * is LOW on MBUF's and needs help. This is where reneging will
6062          * occur. We really hope this does NOT happen!
6063          */
6064         struct sctp_inpcb *inp;
6065         struct sctp_tcb *stcb;
6066
6067         SCTP_INP_INFO_RLOCK();
6068         LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
6069                 /* For each endpoint */
6070                 SCTP_INP_RLOCK(inp);
6071                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6072                         /* For each association */
6073                         SCTP_TCB_LOCK(stcb);
6074                         sctp_drain_mbufs(inp, stcb);
6075                         SCTP_TCB_UNLOCK(stcb);
6076                 }
6077                 SCTP_INP_RUNLOCK(inp);
6078         }
6079         SCTP_INP_INFO_RUNLOCK();
6080 }
6081
6082 /*
6083  * start a new iterator
6084  * iterates through all endpoints and associations based on the pcb_state
6085  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6086  * assocs and "ef" (optional) is executed when the iterator completes.
6087  * "inpf" (optional) is executed for each new endpoint as it is being
6088  * iterated through. inpe (optional) is called when the inp completes
6089  * its way through all the stcbs.
6090  */
6091 int
6092 sctp_initiate_iterator(inp_func inpf,
6093     asoc_func af,
6094     inp_func inpe,
6095     uint32_t pcb_state,
6096     uint32_t pcb_features,
6097     uint32_t asoc_state,
6098     void *argp,
6099     uint32_t argi,
6100     end_func ef,
6101     struct sctp_inpcb *s_inp,
6102     uint8_t chunk_output_off)
6103 {
6104         struct sctp_iterator *it = NULL;
6105
6106         if (af == NULL) {
6107                 return (-1);
6108         }
6109         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6110             SCTP_M_ITER);
6111         if (it == NULL) {
6112                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6113                 return (ENOMEM);
6114         }
6115         memset(it, 0, sizeof(*it));
6116         it->function_assoc = af;
6117         it->function_inp = inpf;
6118         if (inpf)
6119                 it->done_current_ep = 0;
6120         else
6121                 it->done_current_ep = 1;
6122         it->function_atend = ef;
6123         it->pointer = argp;
6124         it->val = argi;
6125         it->pcb_flags = pcb_state;
6126         it->pcb_features = pcb_features;
6127         it->asoc_state = asoc_state;
6128         it->function_inp_end = inpe;
6129         it->no_chunk_output = chunk_output_off;
6130         if (s_inp) {
6131                 it->inp = s_inp;
6132                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
6133         } else {
6134                 SCTP_INP_INFO_RLOCK();
6135                 it->inp = LIST_FIRST(&sctppcbinfo.listhead);
6136
6137                 SCTP_INP_INFO_RUNLOCK();
6138                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
6139
6140         }
6141         SCTP_IPI_ITERATOR_WQ_LOCK();
6142         if (it->inp) {
6143                 SCTP_INP_INCR_REF(it->inp);
6144         }
6145         TAILQ_INSERT_TAIL(&sctppcbinfo.iteratorhead, it, sctp_nxt_itr);
6146 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
6147         if (sctppcbinfo.iterator_running == 0) {
6148                 sctp_wakeup_iterator();
6149         }
6150         SCTP_IPI_ITERATOR_WQ_UNLOCK();
6151 #else
6152         if (it->inp)
6153                 SCTP_INP_DECR_REF(it->inp);
6154         SCTP_IPI_ITERATOR_WQ_UNLOCK();
6155         /* Init the timer */
6156         SCTP_OS_TIMER_INIT(&it->tmr.timer);
6157         /* add to the list of all iterators */
6158         sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it,
6159             NULL, NULL);
6160 #endif
6161         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
6162         return (0);
6163 }