sys/netinet/sctp_pcb.c

   1 /*-
   2  * Copyright (c) 2001-2008, 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 #include <netinet/sctp_dtrace_define.h>
  49 #include <netinet/udp.h>
  50 #include <sys/sched.h>
  51 #include <sys/smp.h>
  52 #include <sys/unistd.h>
  53
  54
  55 VNET_DEFINE(struct sctp_base_info, system_base_info);
  56
  57 /* FIX: we don't handle multiple link local scopes */
  58 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  59 #ifdef INET6
  60 int
  61 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  62 {
  63         struct sockaddr_in6 tmp_a, tmp_b;
  64
  65         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  66         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  67                 return 0;
  68         }
  69         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  70         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  71                 return 0;
  72         }
  73         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  74 }
  75
  76 #endif
  77
  78 void
  79 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  80 {
  81         /*
  82          * We really don't need to lock this, but I will just because it
  83          * does not hurt.
  84          */
  85         SCTP_INP_INFO_RLOCK();
  86         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  87         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  88         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  89         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  90         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  91         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  92         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  93         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
  94
  95         SCTP_INP_INFO_RUNLOCK();
  96 }
  97
  98 /*
  99  * Addresses are added to VRF's (Virtual Router's). For BSD we
 100  * have only the default VRF 0. We maintain a hash list of
 101  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
 102  * these has a list of addresses. When we add a new address
 103  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 104  * not exist we create it and add it to the list of IFN's
 105  * within the VRF. Once we have the sctp_ifn, we add the
 106  * address to the list. So we look something like:
 107  *
 108  * hash-vrf-table
 109  *   vrf-> ifn-> ifn -> ifn
 110  *   vrf    |
 111  *    ...   +--ifa-> ifa -> ifa
 112  *   vrf
 113  *
 114  * We keep these separate lists since the SCTP subsystem will
 115  * point to these from its source address selection nets structure.
 116  * When an address is deleted it does not happen right away on
 117  * the SCTP side, it gets scheduled. What we do when a
 118  * delete happens is immediately remove the address from
 119  * the master list and decrement the refcount. As our
 120  * addip iterator works through and frees the src address
 121  * selection pointing to the sctp_ifa, eventually the refcount
 122  * will reach 0 and we will delete it. Note that it is assumed
 123  * that any locking on system level ifn/ifa is done at the
 124  * caller of these functions and these routines will only
 125  * lock the SCTP structures as they add or delete things.
 126  *
 127  * Other notes on VRF concepts.
 128  *  - An endpoint can be in multiple VRF's
 129  *  - An association lives within a VRF and only one VRF.
 130  *  - Any incoming packet we can deduce the VRF for by
 131  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 132  *  - Any downward send call or connect call must supply the
 133  *    VRF via ancillary data or via some sort of set default
 134  *    VRF socket option call (again for BSD no brainer since
 135  *    the VRF is always 0).
 136  *  - An endpoint may add multiple VRF's to it.
 137  *  - Listening sockets can accept associations in any
 138  *    of the VRF's they are in but the assoc will end up
 139  *    in only one VRF (gotten from the packet or connect/send).
 140  *
 141  */
 142
 143 struct sctp_vrf *
 144 sctp_allocate_vrf(int vrf_id)
 145 {
 146         struct sctp_vrf *vrf = NULL;
 147         struct sctp_vrflist *bucket;
 148
 149         /* First allocate the VRF structure */
 150         vrf = sctp_find_vrf(vrf_id);
 151         if (vrf) {
 152                 /* Already allocated */
 153                 return (vrf);
 154         }
 155         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 156             SCTP_M_VRF);
 157         if (vrf == NULL) {
 158                 /* No memory */
 159 #ifdef INVARIANTS
 160                 panic("No memory for VRF:%d", vrf_id);
 161 #endif
 162                 return (NULL);
 163         }
 164         /* setup the VRF */
 165         memset(vrf, 0, sizeof(struct sctp_vrf));
 166         vrf->vrf_id = vrf_id;
 167         LIST_INIT(&vrf->ifnlist);
 168         vrf->total_ifa_count = 0;
 169         vrf->refcount = 0;
 170         /* now also setup table ids */
 171         SCTP_INIT_VRF_TABLEID(vrf);
 172         /* Init the HASH of addresses */
 173         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 174             &vrf->vrf_addr_hashmark);
 175         if (vrf->vrf_addr_hash == NULL) {
 176                 /* No memory */
 177 #ifdef INVARIANTS
 178                 panic("No memory for VRF:%d", vrf_id);
 179 #endif
 180                 SCTP_FREE(vrf, SCTP_M_VRF);
 181                 return (NULL);
 182         }
 183         /* Add it to the hash table */
 184         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 185         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 186         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 187         return (vrf);
 188 }
 189
 190
 191 struct sctp_ifn *
 192 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 193 {
 194         struct sctp_ifn *sctp_ifnp;
 195         struct sctp_ifnlist *hash_ifn_head;
 196
 197         /*
 198          * We assume the lock is held for the addresses if that's wrong
 199          * problems could occur :-)
 200          */
 201         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 202         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 203                 if (sctp_ifnp->ifn_index == ifn_index) {
 204                         return (sctp_ifnp);
 205                 }
 206                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 207                         return (sctp_ifnp);
 208                 }
 209         }
 210         return (NULL);
 211 }
 212
 213
 214
 215 struct sctp_vrf *
 216 sctp_find_vrf(uint32_t vrf_id)
 217 {
 218         struct sctp_vrflist *bucket;
 219         struct sctp_vrf *liste;
 220
 221         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 222         LIST_FOREACH(liste, bucket, next_vrf) {
 223                 if (vrf_id == liste->vrf_id) {
 224                         return (liste);
 225                 }
 226         }
 227         return (NULL);
 228 }
 229
 230 void
 231 sctp_free_vrf(struct sctp_vrf *vrf)
 232 {
 233         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 234                 if (vrf->vrf_addr_hash) {
 235                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 236                         vrf->vrf_addr_hash = NULL;
 237                 }
 238                 /* We zero'd the count */
 239                 LIST_REMOVE(vrf, next_vrf);
 240                 SCTP_FREE(vrf, SCTP_M_VRF);
 241                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 242         }
 243 }
 244
 245 void
 246 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 247 {
 248         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 249                 /* We zero'd the count */
 250                 if (sctp_ifnp->vrf) {
 251                         sctp_free_vrf(sctp_ifnp->vrf);
 252                 }
 253                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 254                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 255         }
 256 }
 257
 258 void
 259 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 260 {
 261         struct sctp_ifn *sctp_ifnp;
 262
 263         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 264         if (sctp_ifnp != NULL) {
 265                 sctp_ifnp->ifn_mtu = mtu;
 266         }
 267 }
 268
 269
 270 void
 271 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 272 {
 273         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 274                 /* We zero'd the count */
 275                 if (sctp_ifap->ifn_p) {
 276                         sctp_free_ifn(sctp_ifap->ifn_p);
 277                 }
 278                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 279                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 280         }
 281 }
 282
 283 static void
 284 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 285 {
 286         struct sctp_ifn *found;
 287
 288         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 289         if (found == NULL) {
 290                 /* Not in the list.. sorry */
 291                 return;
 292         }
 293         if (hold_addr_lock == 0)
 294                 SCTP_IPI_ADDR_WLOCK();
 295         LIST_REMOVE(sctp_ifnp, next_bucket);
 296         LIST_REMOVE(sctp_ifnp, next_ifn);
 297         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 298             sctp_ifnp->registered_af);
 299         if (hold_addr_lock == 0)
 300                 SCTP_IPI_ADDR_WUNLOCK();
 301         /* Take away the reference, and possibly free it */
 302         sctp_free_ifn(sctp_ifnp);
 303 }
 304
 305 void
 306 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 307     const char *if_name, uint32_t ifn_index)
 308 {
 309         struct sctp_vrf *vrf;
 310         struct sctp_ifa *sctp_ifap = NULL;
 311
 312         SCTP_IPI_ADDR_RLOCK();
 313         vrf = sctp_find_vrf(vrf_id);
 314         if (vrf == NULL) {
 315                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 316                 goto out;
 317
 318         }
 319         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 320         if (sctp_ifap == NULL) {
 321                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 322                 goto out;
 323         }
 324         if (sctp_ifap->ifn_p == NULL) {
 325                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 326                 goto out;
 327         }
 328         if (if_name) {
 329                 int len1, len2;
 330
 331                 len1 = strlen(if_name);
 332                 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
 333                 if (len1 != len2) {
 334                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different length %d vs %d - ignored\n",
 335                             len1, len2);
 336                         goto out;
 337                 }
 338                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
 339                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 340                             sctp_ifap->ifn_p->ifn_name,
 341                             if_name);
 342                         goto out;
 343                 }
 344         } else {
 345                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 346                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 347                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 348                         goto out;
 349                 }
 350         }
 351
 352         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 353         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 354 out:
 355         SCTP_IPI_ADDR_RUNLOCK();
 356 }
 357
 358 void
 359 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 360     const char *if_name, uint32_t ifn_index)
 361 {
 362         struct sctp_vrf *vrf;
 363         struct sctp_ifa *sctp_ifap = NULL;
 364
 365         SCTP_IPI_ADDR_RLOCK();
 366         vrf = sctp_find_vrf(vrf_id);
 367         if (vrf == NULL) {
 368                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 369                 goto out;
 370
 371         }
 372         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 373         if (sctp_ifap == NULL) {
 374                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 375                 goto out;
 376         }
 377         if (sctp_ifap->ifn_p == NULL) {
 378                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 379                 goto out;
 380         }
 381         if (if_name) {
 382                 int len1, len2;
 383
 384                 len1 = strlen(if_name);
 385                 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
 386                 if (len1 != len2) {
 387                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different length %d vs %d - ignored\n",
 388                             len1, len2);
 389                         goto out;
 390                 }
 391                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
 392                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 393                             sctp_ifap->ifn_p->ifn_name,
 394                             if_name);
 395                         goto out;
 396                 }
 397         } else {
 398                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 399                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 400                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 401                         goto out;
 402                 }
 403         }
 404
 405         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 406         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 407 out:
 408         SCTP_IPI_ADDR_RUNLOCK();
 409 }
 410
 411 /*-
 412  * Add an ifa to an ifn.
 413  * Register the interface as necessary.
 414  * NOTE: ADDR write lock MUST be held.
 415  */
 416 static void
 417 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 418 {
 419         int ifa_af;
 420
 421         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 422         sctp_ifap->ifn_p = sctp_ifnp;
 423         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 424         /* update address counts */
 425         sctp_ifnp->ifa_count++;
 426         ifa_af = sctp_ifap->address.sa.sa_family;
 427         if (ifa_af == AF_INET)
 428                 sctp_ifnp->num_v4++;
 429         else
 430                 sctp_ifnp->num_v6++;
 431         if (sctp_ifnp->ifa_count == 1) {
 432                 /* register the new interface */
 433                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 434                 sctp_ifnp->registered_af = ifa_af;
 435         }
 436 }
 437
 438 /*-
 439  * Remove an ifa from its ifn.
 440  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 441  * the interface based on the remaining address families left.
 442  * NOTE: ADDR write lock MUST be held.
 443  */
 444 static void
 445 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 446 {
 447         uint32_t ifn_index;
 448
 449         LIST_REMOVE(sctp_ifap, next_ifa);
 450         if (sctp_ifap->ifn_p) {
 451                 /* update address counts */
 452                 sctp_ifap->ifn_p->ifa_count--;
 453                 if (sctp_ifap->address.sa.sa_family == AF_INET6)
 454                         sctp_ifap->ifn_p->num_v6--;
 455                 else if (sctp_ifap->address.sa.sa_family == AF_INET)
 456                         sctp_ifap->ifn_p->num_v4--;
 457
 458                 ifn_index = sctp_ifap->ifn_p->ifn_index;
 459                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 460                         /* remove the ifn, possibly freeing it */
 461                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 462                 } else {
 463                         /* re-register address family type, if needed */
 464                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 465                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 466                                 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET6);
 467                                 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET);
 468                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 469                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 470                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 471                                 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET);
 472                                 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET6);
 473                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 474                         }
 475                         /* free the ifn refcount */
 476                         sctp_free_ifn(sctp_ifap->ifn_p);
 477                 }
 478                 sctp_ifap->ifn_p = NULL;
 479         }
 480 }
 481
 482 struct sctp_ifa *
 483 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 484     uint32_t ifn_type, const char *if_name, void *ifa,
 485     struct sockaddr *addr, uint32_t ifa_flags,
 486     int dynamic_add)
 487 {
 488         struct sctp_vrf *vrf;
 489         struct sctp_ifn *sctp_ifnp = NULL;
 490         struct sctp_ifa *sctp_ifap = NULL;
 491         struct sctp_ifalist *hash_addr_head;
 492         struct sctp_ifnlist *hash_ifn_head;
 493         uint32_t hash_of_addr;
 494         int new_ifn_af = 0;
 495
 496 #ifdef SCTP_DEBUG
 497         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 498         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 499 #endif
 500         SCTP_IPI_ADDR_WLOCK();
 501         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 502         if (sctp_ifnp) {
 503                 vrf = sctp_ifnp->vrf;
 504         } else {
 505                 vrf = sctp_find_vrf(vrf_id);
 506                 if (vrf == NULL) {
 507                         vrf = sctp_allocate_vrf(vrf_id);
 508                         if (vrf == NULL) {
 509                                 SCTP_IPI_ADDR_WUNLOCK();
 510                                 return (NULL);
 511                         }
 512                 }
 513         }
 514         if (sctp_ifnp == NULL) {
 515                 /*
 516                  * build one and add it, can't hold lock until after malloc
 517                  * done though.
 518                  */
 519                 SCTP_IPI_ADDR_WUNLOCK();
 520                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 521                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 522                 if (sctp_ifnp == NULL) {
 523 #ifdef INVARIANTS
 524                         panic("No memory for IFN");
 525 #endif
 526                         return (NULL);
 527                 }
 528                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 529                 sctp_ifnp->ifn_index = ifn_index;
 530                 sctp_ifnp->ifn_p = ifn;
 531                 sctp_ifnp->ifn_type = ifn_type;
 532                 sctp_ifnp->refcount = 0;
 533                 sctp_ifnp->vrf = vrf;
 534                 atomic_add_int(&vrf->refcount, 1);
 535                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 536                 if (if_name != NULL) {
 537                         memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ);
 538                 } else {
 539                         memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ));
 540                 }
 541                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 542                 LIST_INIT(&sctp_ifnp->ifalist);
 543                 SCTP_IPI_ADDR_WLOCK();
 544                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 545                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 546                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 547                 new_ifn_af = 1;
 548         }
 549         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 550         if (sctp_ifap) {
 551                 /* Hmm, it already exists? */
 552                 if ((sctp_ifap->ifn_p) &&
 553                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 554                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 555                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 556                             sctp_ifap);
 557                         if (new_ifn_af) {
 558                                 /* Remove the created one that we don't want */
 559                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 560                         }
 561                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 562                                 /* easy to solve, just switch back to active */
 563                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 564                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 565                                 sctp_ifap->ifn_p = sctp_ifnp;
 566                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 567                         }
 568         exit_stage_left:
 569                         SCTP_IPI_ADDR_WUNLOCK();
 570                         return (sctp_ifap);
 571                 } else {
 572                         if (sctp_ifap->ifn_p) {
 573                                 /*
 574                                  * The last IFN gets the address, remove the
 575                                  * old one
 576                                  */
 577                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 578                                     sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 579                                     sctp_ifap->ifn_p->ifn_index, if_name,
 580                                     ifn_index);
 581                                 /* remove the address from the old ifn */
 582                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 583                                 /* move the address over to the new ifn */
 584                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 585                                 goto exit_stage_left;
 586                         } else {
 587                                 /* repair ifnp which was NULL ? */
 588                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 589                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 590                                     sctp_ifnp, sctp_ifap);
 591                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 592                         }
 593                         goto exit_stage_left;
 594                 }
 595         }
 596         SCTP_IPI_ADDR_WUNLOCK();
 597         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 598         if (sctp_ifap == NULL) {
 599 #ifdef INVARIANTS
 600                 panic("No memory for IFA");
 601 #endif
 602                 return (NULL);
 603         }
 604         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 605         sctp_ifap->ifn_p = sctp_ifnp;
 606         atomic_add_int(&sctp_ifnp->refcount, 1);
 607         sctp_ifap->vrf_id = vrf_id;
 608         sctp_ifap->ifa = ifa;
 609         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 610         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 611         sctp_ifap->flags = ifa_flags;
 612         /* Set scope */
 613         switch (sctp_ifap->address.sa.sa_family) {
 614         case AF_INET:
 615                 {
 616                         struct sockaddr_in *sin;
 617
 618                         sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
 619                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 620                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 621                                 sctp_ifap->src_is_loop = 1;
 622                         }
 623                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 624                                 sctp_ifap->src_is_priv = 1;
 625                         }
 626                         sctp_ifnp->num_v4++;
 627                         if (new_ifn_af)
 628                                 new_ifn_af = AF_INET;
 629                         break;
 630                 }
 631 #ifdef INET6
 632         case AF_INET6:
 633                 {
 634                         /* ok to use deprecated addresses? */
 635                         struct sockaddr_in6 *sin6;
 636
 637                         sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
 638                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 639                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 640                                 sctp_ifap->src_is_loop = 1;
 641                         }
 642                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 643                                 sctp_ifap->src_is_priv = 1;
 644                         }
 645                         sctp_ifnp->num_v6++;
 646                         if (new_ifn_af)
 647                                 new_ifn_af = AF_INET6;
 648                         break;
 649                 }
 650 #endif
 651         default:
 652                 new_ifn_af = 0;
 653                 break;
 654         }
 655         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 656
 657         if ((sctp_ifap->src_is_priv == 0) &&
 658             (sctp_ifap->src_is_loop == 0)) {
 659                 sctp_ifap->src_is_glob = 1;
 660         }
 661         SCTP_IPI_ADDR_WLOCK();
 662         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 663         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 664         sctp_ifap->refcount = 1;
 665         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 666         sctp_ifnp->ifa_count++;
 667         vrf->total_ifa_count++;
 668         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 669         if (new_ifn_af) {
 670                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 671                 sctp_ifnp->registered_af = new_ifn_af;
 672         }
 673         SCTP_IPI_ADDR_WUNLOCK();
 674         if (dynamic_add) {
 675                 /*
 676                  * Bump up the refcount so that when the timer completes it
 677                  * will drop back down.
 678                  */
 679                 struct sctp_laddr *wi;
 680
 681                 atomic_add_int(&sctp_ifap->refcount, 1);
 682                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 683                 if (wi == NULL) {
 684                         /*
 685                          * Gak, what can we do? We have lost an address
 686                          * change can you say HOSED?
 687                          */
 688                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 689                         /* Opps, must decrement the count */
 690                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 691                             if_name);
 692                         return (NULL);
 693                 }
 694                 SCTP_INCR_LADDR_COUNT();
 695                 bzero(wi, sizeof(*wi));
 696                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 697                 wi->ifa = sctp_ifap;
 698                 wi->action = SCTP_ADD_IP_ADDRESS;
 699
 700                 SCTP_WQ_ADDR_LOCK();
 701                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 702                 SCTP_WQ_ADDR_UNLOCK();
 703
 704                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 705                     (struct sctp_inpcb *)NULL,
 706                     (struct sctp_tcb *)NULL,
 707                     (struct sctp_nets *)NULL);
 708         } else {
 709                 /* it's ready for use */
 710                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 711         }
 712         return (sctp_ifap);
 713 }
 714
 715 void
 716 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 717     uint32_t ifn_index, const char *if_name)
 718 {
 719         struct sctp_vrf *vrf;
 720         struct sctp_ifa *sctp_ifap = NULL;
 721
 722         SCTP_IPI_ADDR_WLOCK();
 723         vrf = sctp_find_vrf(vrf_id);
 724         if (vrf == NULL) {
 725                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 726                 goto out_now;
 727         }
 728 #ifdef SCTP_DEBUG
 729         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 730         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 731 #endif
 732         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 733         if (sctp_ifap) {
 734                 /* Validate the delete */
 735                 if (sctp_ifap->ifn_p) {
 736                         int valid = 0;
 737
 738                         /*-
 739                          * The name has priority over the ifn_index
 740                          * if its given. We do this especially for
 741                          * panda who might recycle indexes fast.
 742                          */
 743                         if (if_name) {
 744                                 int len1, len2;
 745
 746                                 len1 = min(SCTP_IFNAMSIZ, strlen(if_name));
 747                                 len2 = min(SCTP_IFNAMSIZ, strlen(sctp_ifap->ifn_p->ifn_name));
 748                                 if (len1 && len2 && (len1 == len2)) {
 749                                         /* we can compare them */
 750                                         if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) == 0) {
 751                                                 /*
 752                                                  * They match its a correct
 753                                                  * delete
 754                                                  */
 755                                                 valid = 1;
 756                                         }
 757                                 }
 758                         }
 759                         if (!valid) {
 760                                 /* last ditch check ifn_index */
 761                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 762                                         valid = 1;
 763                                 }
 764                         }
 765                         if (!valid) {
 766                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 767                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 768                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 769                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 770                                 SCTP_IPI_ADDR_WUNLOCK();
 771                                 return;
 772                         }
 773                 }
 774                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap);
 775                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 776                 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
 777                 vrf->total_ifa_count--;
 778                 LIST_REMOVE(sctp_ifap, next_bucket);
 779                 sctp_remove_ifa_from_ifn(sctp_ifap);
 780         }
 781 #ifdef SCTP_DEBUG
 782         else {
 783                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 784                     ifn_index);
 785                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 786         }
 787 #endif
 788
 789 out_now:
 790         SCTP_IPI_ADDR_WUNLOCK();
 791         if (sctp_ifap) {
 792                 struct sctp_laddr *wi;
 793
 794                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 795                 if (wi == NULL) {
 796                         /*
 797                          * Gak, what can we do? We have lost an address
 798                          * change can you say HOSED?
 799                          */
 800                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 801
 802                         /* Oops, must decrement the count */
 803                         sctp_free_ifa(sctp_ifap);
 804                         return;
 805                 }
 806                 SCTP_INCR_LADDR_COUNT();
 807                 bzero(wi, sizeof(*wi));
 808                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 809                 wi->ifa = sctp_ifap;
 810                 wi->action = SCTP_DEL_IP_ADDRESS;
 811                 SCTP_WQ_ADDR_LOCK();
 812                 /*
 813                  * Should this really be a tailq? As it is we will process
 814                  * the newest first :-0
 815                  */
 816                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 817                 SCTP_WQ_ADDR_UNLOCK();
 818
 819                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 820                     (struct sctp_inpcb *)NULL,
 821                     (struct sctp_tcb *)NULL,
 822                     (struct sctp_nets *)NULL);
 823         }
 824         return;
 825 }
 826
 827
 828 static struct sctp_tcb *
 829 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 830     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
 831 {
 832         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
 833         /*
 834          * If we support the TCP model, then we must now dig through to see
 835          * if we can find our endpoint in the list of tcp ep's.
 836          */
 837         uint16_t lport, rport;
 838         struct sctppcbhead *ephead;
 839         struct sctp_inpcb *inp;
 840         struct sctp_laddr *laddr;
 841         struct sctp_tcb *stcb;
 842         struct sctp_nets *net;
 843
 844         if ((to == NULL) || (from == NULL)) {
 845                 return (NULL);
 846         }
 847         if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
 848                 lport = ((struct sockaddr_in *)to)->sin_port;
 849                 rport = ((struct sockaddr_in *)from)->sin_port;
 850         } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
 851                 lport = ((struct sockaddr_in6 *)to)->sin6_port;
 852                 rport = ((struct sockaddr_in6 *)from)->sin6_port;
 853         } else {
 854                 return NULL;
 855         }
 856         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
 857         /*
 858          * Ok now for each of the guys in this bucket we must look and see:
 859          * - Does the remote port match. - Does there single association's
 860          * addresses match this address (to). If so we update p_ep to point
 861          * to this ep and return the tcb from it.
 862          */
 863         LIST_FOREACH(inp, ephead, sctp_hash) {
 864                 SCTP_INP_RLOCK(inp);
 865                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 866                         SCTP_INP_RUNLOCK(inp);
 867                         continue;
 868                 }
 869                 if (lport != inp->sctp_lport) {
 870                         SCTP_INP_RUNLOCK(inp);
 871                         continue;
 872                 }
 873                 if (inp->def_vrf_id != vrf_id) {
 874                         SCTP_INP_RUNLOCK(inp);
 875                         continue;
 876                 }
 877                 /* check to see if the ep has one of the addresses */
 878                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 879                         /* We are NOT bound all, so look further */
 880                         int match = 0;
 881
 882                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 883
 884                                 if (laddr->ifa == NULL) {
 885                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
 886                                         continue;
 887                                 }
 888                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 889                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 890                                         continue;
 891                                 }
 892                                 if (laddr->ifa->address.sa.sa_family ==
 893                                     to->sa_family) {
 894                                         /* see if it matches */
 895                                         struct sockaddr_in *intf_addr, *sin;
 896
 897                                         intf_addr = &laddr->ifa->address.sin;
 898                                         sin = (struct sockaddr_in *)to;
 899                                         if (from->sa_family == AF_INET) {
 900                                                 if (sin->sin_addr.s_addr ==
 901                                                     intf_addr->sin_addr.s_addr) {
 902                                                         match = 1;
 903                                                         break;
 904                                                 }
 905                                         }
 906 #ifdef INET6
 907                                         if (from->sa_family == AF_INET6) {
 908                                                 struct sockaddr_in6 *intf_addr6;
 909                                                 struct sockaddr_in6 *sin6;
 910
 911                                                 sin6 = (struct sockaddr_in6 *)
 912                                                     to;
 913                                                 intf_addr6 = &laddr->ifa->address.sin6;
 914
 915                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
 916                                                     intf_addr6)) {
 917                                                         match = 1;
 918                                                         break;
 919                                                 }
 920                                         }
 921 #endif
 922                                 }
 923                         }
 924                         if (match == 0) {
 925                                 /* This endpoint does not have this address */
 926                                 SCTP_INP_RUNLOCK(inp);
 927                                 continue;
 928                         }
 929                 }
 930                 /*
 931                  * Ok if we hit here the ep has the address, does it hold
 932                  * the tcb?
 933                  */
 934
 935                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 936                 if (stcb == NULL) {
 937                         SCTP_INP_RUNLOCK(inp);
 938                         continue;
 939                 }
 940                 SCTP_TCB_LOCK(stcb);
 941                 if (stcb->rport != rport) {
 942                         /* remote port does not match. */
 943                         SCTP_TCB_UNLOCK(stcb);
 944                         SCTP_INP_RUNLOCK(inp);
 945                         continue;
 946                 }
 947                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 948                         SCTP_TCB_UNLOCK(stcb);
 949                         SCTP_INP_RUNLOCK(inp);
 950                         continue;
 951                 }
 952                 /* Does this TCB have a matching address? */
 953                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 954
 955                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
 956                                 /* not the same family, can't be a match */
 957                                 continue;
 958                         }
 959                         switch (from->sa_family) {
 960                         case AF_INET:
 961                                 {
 962                                         struct sockaddr_in *sin, *rsin;
 963
 964                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
 965                                         rsin = (struct sockaddr_in *)from;
 966                                         if (sin->sin_addr.s_addr ==
 967                                             rsin->sin_addr.s_addr) {
 968                                                 /* found it */
 969                                                 if (netp != NULL) {
 970                                                         *netp = net;
 971                                                 }
 972                                                 /*
 973                                                  * Update the endpoint
 974                                                  * pointer
 975                                                  */
 976                                                 *inp_p = inp;
 977                                                 SCTP_INP_RUNLOCK(inp);
 978                                                 return (stcb);
 979                                         }
 980                                         break;
 981                                 }
 982 #ifdef INET6
 983                         case AF_INET6:
 984                                 {
 985                                         struct sockaddr_in6 *sin6, *rsin6;
 986
 987                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 988                                         rsin6 = (struct sockaddr_in6 *)from;
 989                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
 990                                             rsin6)) {
 991                                                 /* found it */
 992                                                 if (netp != NULL) {
 993                                                         *netp = net;
 994                                                 }
 995                                                 /*
 996                                                  * Update the endpoint
 997                                                  * pointer
 998                                                  */
 999                                                 *inp_p = inp;
1000                                                 SCTP_INP_RUNLOCK(inp);
1001                                                 return (stcb);
1002                                         }
1003                                         break;
1004                                 }
1005 #endif
1006                         default:
1007                                 /* TSNH */
1008                                 break;
1009                         }
1010                 }
1011                 SCTP_TCB_UNLOCK(stcb);
1012                 SCTP_INP_RUNLOCK(inp);
1013         }
1014         return (NULL);
1015 }
1016
1017 static int
1018 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
1019 {
1020         int loopback_scope, ipv4_local_scope, local_scope, site_scope;
1021         int ipv4_addr_legal, ipv6_addr_legal;
1022         struct sctp_vrf *vrf;
1023         struct sctp_ifn *sctp_ifn;
1024         struct sctp_ifa *sctp_ifa;
1025
1026         loopback_scope = stcb->asoc.loopback_scope;
1027         ipv4_local_scope = stcb->asoc.ipv4_local_scope;
1028         local_scope = stcb->asoc.local_scope;
1029         site_scope = stcb->asoc.site_scope;
1030         ipv4_addr_legal = ipv6_addr_legal = 0;
1031         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1032                 ipv6_addr_legal = 1;
1033                 if (SCTP_IPV6_V6ONLY(stcb->sctp_ep) == 0) {
1034                         ipv4_addr_legal = 1;
1035                 }
1036         } else {
1037                 ipv4_addr_legal = 1;
1038         }
1039
1040         SCTP_IPI_ADDR_RLOCK();
1041         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
1042         if (vrf == NULL) {
1043                 /* no vrf, no addresses */
1044                 SCTP_IPI_ADDR_RUNLOCK();
1045                 return (0);
1046         }
1047         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
1048                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
1049                         if ((loopback_scope == 0) &&
1050                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
1051                                 continue;
1052                         }
1053                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
1054                                 if (sctp_is_addr_restricted(stcb, sctp_ifa))
1055                                         continue;
1056                                 switch (sctp_ifa->address.sa.sa_family) {
1057 #ifdef INET
1058                                 case AF_INET:
1059                                         if (ipv4_addr_legal) {
1060                                                 struct sockaddr_in *sin,
1061                                                            *rsin;
1062
1063                                                 sin = &sctp_ifa->address.sin;
1064                                                 rsin = (struct sockaddr_in *)to;
1065                                                 if ((ipv4_local_scope == 0) &&
1066                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
1067                                                         continue;
1068                                                 }
1069                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1070                                                         SCTP_IPI_ADDR_RUNLOCK();
1071                                                         return (1);
1072                                                 }
1073                                         }
1074                                         break;
1075 #endif
1076 #ifdef INET6
1077                                 case AF_INET6:
1078                                         if (ipv6_addr_legal) {
1079                                                 struct sockaddr_in6 *sin6,
1080                                                             *rsin6;
1081
1082                                                 sin6 = &sctp_ifa->address.sin6;
1083                                                 rsin6 = (struct sockaddr_in6 *)to;
1084                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1085                                                         if (local_scope == 0)
1086                                                                 continue;
1087                                                         if (sin6->sin6_scope_id == 0) {
1088                                                                 if (sa6_recoverscope(sin6) != 0)
1089                                                                         continue;
1090                                                         }
1091                                                 }
1092                                                 if ((site_scope == 0) &&
1093                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1094                                                         continue;
1095                                                 }
1096                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1097                                                         SCTP_IPI_ADDR_RUNLOCK();
1098                                                         return (1);
1099                                                 }
1100                                         }
1101                                         break;
1102 #endif
1103                                 default:
1104                                         /* TSNH */
1105                                         break;
1106                                 }
1107                         }
1108                 }
1109         } else {
1110                 struct sctp_laddr *laddr;
1111
1112                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
1113                         if (sctp_is_addr_restricted(stcb, laddr->ifa)) {
1114                                 continue;
1115                         }
1116                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
1117                                 continue;
1118                         }
1119                         switch (to->sa_family) {
1120 #ifdef INET
1121                         case AF_INET:
1122                                 {
1123                                         struct sockaddr_in *sin, *rsin;
1124
1125                                         sin = (struct sockaddr_in *)&laddr->ifa->address.sin;
1126                                         rsin = (struct sockaddr_in *)to;
1127                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1128                                                 SCTP_IPI_ADDR_RUNLOCK();
1129                                                 return (1);
1130                                         }
1131                                         break;
1132                                 }
1133 #endif
1134 #ifdef INET6
1135                         case AF_INET6:
1136                                 {
1137                                         struct sockaddr_in6 *sin6, *rsin6;
1138
1139                                         sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6;
1140                                         rsin6 = (struct sockaddr_in6 *)to;
1141                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1142                                                 SCTP_IPI_ADDR_RUNLOCK();
1143                                                 return (1);
1144                                         }
1145                                         break;
1146                                 }
1147
1148 #endif
1149                         default:
1150                                 /* TSNH */
1151                                 break;
1152                         }
1153
1154                 }
1155         }
1156         SCTP_IPI_ADDR_RUNLOCK();
1157         return (0);
1158 }
1159
1160 /*
1161  * rules for use
1162  *
1163  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1164  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1165  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1166  * NULL.
1167  */
1168
1169 struct sctp_tcb *
1170 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1171     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1172 {
1173         struct sctpasochead *head;
1174         struct sctp_inpcb *inp;
1175         struct sctp_tcb *stcb = NULL;
1176         struct sctp_nets *net;
1177         uint16_t rport;
1178
1179         inp = *inp_p;
1180         if (remote->sa_family == AF_INET) {
1181                 rport = (((struct sockaddr_in *)remote)->sin_port);
1182         } else if (remote->sa_family == AF_INET6) {
1183                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1184         } else {
1185                 return (NULL);
1186         }
1187         if (locked_tcb) {
1188                 /*
1189                  * UN-lock so we can do proper locking here this occurs when
1190                  * called from load_addresses_from_init.
1191                  */
1192                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1193                 SCTP_TCB_UNLOCK(locked_tcb);
1194         }
1195         SCTP_INP_INFO_RLOCK();
1196         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
1197                 /*-
1198                  * Now either this guy is our listener or it's the
1199                  * connector. If it is the one that issued the connect, then
1200                  * it's only chance is to be the first TCB in the list. If
1201                  * it is the acceptor, then do the special_lookup to hash
1202                  * and find the real inp.
1203                  */
1204                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1205                         /* to is peer addr, from is my addr */
1206                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1207                             netp, inp->def_vrf_id);
1208                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1209                                 /* we have a locked tcb, lower refcount */
1210                                 SCTP_INP_DECR_REF(inp);
1211                         }
1212                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1213                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1214                                 SCTP_TCB_LOCK(locked_tcb);
1215                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1216                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1217                         }
1218                         SCTP_INP_INFO_RUNLOCK();
1219                         return (stcb);
1220                 } else {
1221                         SCTP_INP_WLOCK(inp);
1222                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1223                                 goto null_return;
1224                         }
1225                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1226                         if (stcb == NULL) {
1227                                 goto null_return;
1228                         }
1229                         SCTP_TCB_LOCK(stcb);
1230
1231                         if (stcb->rport != rport) {
1232                                 /* remote port does not match. */
1233                                 SCTP_TCB_UNLOCK(stcb);
1234                                 goto null_return;
1235                         }
1236                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1237                                 SCTP_TCB_UNLOCK(stcb);
1238                                 goto null_return;
1239                         }
1240                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1241                                 SCTP_TCB_UNLOCK(stcb);
1242                                 goto null_return;
1243                         }
1244                         /* now look at the list of remote addresses */
1245                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1246 #ifdef INVARIANTS
1247                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1248                                         panic("Corrupt net list");
1249                                 }
1250 #endif
1251                                 if (net->ro._l_addr.sa.sa_family !=
1252                                     remote->sa_family) {
1253                                         /* not the same family */
1254                                         continue;
1255                                 }
1256                                 switch (remote->sa_family) {
1257                                 case AF_INET:
1258                                         {
1259                                                 struct sockaddr_in *sin,
1260                                                            *rsin;
1261
1262                                                 sin = (struct sockaddr_in *)
1263                                                     &net->ro._l_addr;
1264                                                 rsin = (struct sockaddr_in *)remote;
1265                                                 if (sin->sin_addr.s_addr ==
1266                                                     rsin->sin_addr.s_addr) {
1267                                                         /* found it */
1268                                                         if (netp != NULL) {
1269                                                                 *netp = net;
1270                                                         }
1271                                                         if (locked_tcb == NULL) {
1272                                                                 SCTP_INP_DECR_REF(inp);
1273                                                         } else if (locked_tcb != stcb) {
1274                                                                 SCTP_TCB_LOCK(locked_tcb);
1275                                                         }
1276                                                         if (locked_tcb) {
1277                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1278                                                         }
1279                                                         SCTP_INP_WUNLOCK(inp);
1280                                                         SCTP_INP_INFO_RUNLOCK();
1281                                                         return (stcb);
1282                                                 }
1283                                                 break;
1284                                         }
1285 #ifdef INET6
1286                                 case AF_INET6:
1287                                         {
1288                                                 struct sockaddr_in6 *sin6,
1289                                                             *rsin6;
1290
1291                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1292                                                 rsin6 = (struct sockaddr_in6 *)remote;
1293                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1294                                                     rsin6)) {
1295                                                         /* found it */
1296                                                         if (netp != NULL) {
1297                                                                 *netp = net;
1298                                                         }
1299                                                         if (locked_tcb == NULL) {
1300                                                                 SCTP_INP_DECR_REF(inp);
1301                                                         } else if (locked_tcb != stcb) {
1302                                                                 SCTP_TCB_LOCK(locked_tcb);
1303                                                         }
1304                                                         if (locked_tcb) {
1305                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1306                                                         }
1307                                                         SCTP_INP_WUNLOCK(inp);
1308                                                         SCTP_INP_INFO_RUNLOCK();
1309                                                         return (stcb);
1310                                                 }
1311                                                 break;
1312                                         }
1313 #endif
1314                                 default:
1315                                         /* TSNH */
1316                                         break;
1317                                 }
1318                         }
1319                         SCTP_TCB_UNLOCK(stcb);
1320                 }
1321         } else {
1322                 SCTP_INP_WLOCK(inp);
1323                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1324                         goto null_return;
1325                 }
1326                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1327                     inp->sctp_hashmark)];
1328                 if (head == NULL) {
1329                         goto null_return;
1330                 }
1331                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1332                         if (stcb->rport != rport) {
1333                                 /* remote port does not match */
1334                                 continue;
1335                         }
1336                         SCTP_TCB_LOCK(stcb);
1337                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1338                                 SCTP_TCB_UNLOCK(stcb);
1339                                 continue;
1340                         }
1341                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1342                                 SCTP_TCB_UNLOCK(stcb);
1343                                 continue;
1344                         }
1345                         /* now look at the list of remote addresses */
1346                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1347 #ifdef INVARIANTS
1348                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1349                                         panic("Corrupt net list");
1350                                 }
1351 #endif
1352                                 if (net->ro._l_addr.sa.sa_family !=
1353                                     remote->sa_family) {
1354                                         /* not the same family */
1355                                         continue;
1356                                 }
1357                                 switch (remote->sa_family) {
1358                                 case AF_INET:
1359                                         {
1360                                                 struct sockaddr_in *sin,
1361                                                            *rsin;
1362
1363                                                 sin = (struct sockaddr_in *)
1364                                                     &net->ro._l_addr;
1365                                                 rsin = (struct sockaddr_in *)remote;
1366                                                 if (sin->sin_addr.s_addr ==
1367                                                     rsin->sin_addr.s_addr) {
1368                                                         /* found it */
1369                                                         if (netp != NULL) {
1370                                                                 *netp = net;
1371                                                         }
1372                                                         if (locked_tcb == NULL) {
1373                                                                 SCTP_INP_DECR_REF(inp);
1374                                                         } else if (locked_tcb != stcb) {
1375                                                                 SCTP_TCB_LOCK(locked_tcb);
1376                                                         }
1377                                                         if (locked_tcb) {
1378                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1379                                                         }
1380                                                         SCTP_INP_WUNLOCK(inp);
1381                                                         SCTP_INP_INFO_RUNLOCK();
1382                                                         return (stcb);
1383                                                 }
1384                                                 break;
1385                                         }
1386 #ifdef INET6
1387                                 case AF_INET6:
1388                                         {
1389                                                 struct sockaddr_in6 *sin6,
1390                                                             *rsin6;
1391
1392                                                 sin6 = (struct sockaddr_in6 *)
1393                                                     &net->ro._l_addr;
1394                                                 rsin6 = (struct sockaddr_in6 *)remote;
1395                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1396                                                     rsin6)) {
1397                                                         /* found it */
1398                                                         if (netp != NULL) {
1399                                                                 *netp = net;
1400                                                         }
1401                                                         if (locked_tcb == NULL) {
1402                                                                 SCTP_INP_DECR_REF(inp);
1403                                                         } else if (locked_tcb != stcb) {
1404                                                                 SCTP_TCB_LOCK(locked_tcb);
1405                                                         }
1406                                                         if (locked_tcb) {
1407                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1408                                                         }
1409                                                         SCTP_INP_WUNLOCK(inp);
1410                                                         SCTP_INP_INFO_RUNLOCK();
1411                                                         return (stcb);
1412                                                 }
1413                                                 break;
1414                                         }
1415 #endif
1416                                 default:
1417                                         /* TSNH */
1418                                         break;
1419                                 }
1420                         }
1421                         SCTP_TCB_UNLOCK(stcb);
1422                 }
1423         }
1424 null_return:
1425         /* clean up for returning null */
1426         if (locked_tcb) {
1427                 SCTP_TCB_LOCK(locked_tcb);
1428                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1429         }
1430         SCTP_INP_WUNLOCK(inp);
1431         SCTP_INP_INFO_RUNLOCK();
1432         /* not found */
1433         return (NULL);
1434 }
1435
1436 /*
1437  * Find an association for a specific endpoint using the association id given
1438  * out in the COMM_UP notification
1439  */
1440
1441 struct sctp_tcb *
1442 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1443 {
1444         /*
1445          * Use my the assoc_id to find a endpoint
1446          */
1447         struct sctpasochead *head;
1448         struct sctp_tcb *stcb;
1449         uint32_t id;
1450
1451         if (inp == NULL) {
1452                 SCTP_PRINTF("TSNH ep_associd\n");
1453                 return (NULL);
1454         }
1455         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1456                 SCTP_PRINTF("TSNH ep_associd0\n");
1457                 return (NULL);
1458         }
1459         id = (uint32_t) asoc_id;
1460         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1461         if (head == NULL) {
1462                 /* invalid id TSNH */
1463                 SCTP_PRINTF("TSNH ep_associd1\n");
1464                 return (NULL);
1465         }
1466         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1467                 if (stcb->asoc.assoc_id == id) {
1468                         if (inp != stcb->sctp_ep) {
1469                                 /*
1470                                  * some other guy has the same id active (id
1471                                  * collision ??).
1472                                  */
1473                                 SCTP_PRINTF("TSNH ep_associd2\n");
1474                                 continue;
1475                         }
1476                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1477                                 continue;
1478                         }
1479                         if (want_lock) {
1480                                 SCTP_TCB_LOCK(stcb);
1481                         }
1482                         return (stcb);
1483                 }
1484         }
1485         return (NULL);
1486 }
1487
1488
1489 struct sctp_tcb *
1490 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1491 {
1492         struct sctp_tcb *stcb;
1493
1494         SCTP_INP_RLOCK(inp);
1495         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1496         SCTP_INP_RUNLOCK(inp);
1497         return (stcb);
1498 }
1499
1500
1501 static struct sctp_inpcb *
1502 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1503     uint16_t lport, uint32_t vrf_id)
1504 {
1505         struct sctp_inpcb *inp;
1506         struct sockaddr_in *sin;
1507
1508 #ifdef INET6
1509         struct sockaddr_in6 *sin6;
1510
1511 #endif
1512         struct sctp_laddr *laddr;
1513
1514 #ifdef INET6
1515         struct sockaddr_in6 *intf_addr6;
1516
1517 #endif
1518
1519         int fnd;
1520
1521         /*
1522          * Endpoint probe expects that the INP_INFO is locked.
1523          */
1524         sin = NULL;
1525 #ifdef INET6
1526         sin6 = NULL;
1527 #endif
1528         switch (nam->sa_family) {
1529         case AF_INET:
1530                 sin = (struct sockaddr_in *)nam;
1531                 break;
1532 #ifdef INET6
1533         case AF_INET6:
1534                 sin6 = (struct sockaddr_in6 *)nam;
1535                 break;
1536 #endif
1537         default:
1538                 /* unsupported family */
1539                 return (NULL);
1540         }
1541
1542         if (head == NULL)
1543                 return (NULL);
1544
1545         LIST_FOREACH(inp, head, sctp_hash) {
1546                 SCTP_INP_RLOCK(inp);
1547                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1548                         SCTP_INP_RUNLOCK(inp);
1549                         continue;
1550                 }
1551                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1552                     (inp->sctp_lport == lport)) {
1553                         /* got it */
1554                         if ((nam->sa_family == AF_INET) &&
1555                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1556                             SCTP_IPV6_V6ONLY(inp)) {
1557                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1558                                 SCTP_INP_RUNLOCK(inp);
1559                                 continue;
1560                         }
1561                         /* A V6 address and the endpoint is NOT bound V6 */
1562                         if (nam->sa_family == AF_INET6 &&
1563                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1564                                 SCTP_INP_RUNLOCK(inp);
1565                                 continue;
1566                         }
1567                         /* does a VRF id match? */
1568                         fnd = 0;
1569                         if (inp->def_vrf_id == vrf_id)
1570                                 fnd = 1;
1571
1572                         SCTP_INP_RUNLOCK(inp);
1573                         if (!fnd)
1574                                 continue;
1575                         return (inp);
1576                 }
1577                 SCTP_INP_RUNLOCK(inp);
1578         }
1579         if ((nam->sa_family == AF_INET) &&
1580             (sin->sin_addr.s_addr == INADDR_ANY)) {
1581                 /* Can't hunt for one that has no address specified */
1582                 return (NULL);
1583         }
1584 #ifdef INET6
1585         if ((nam->sa_family == AF_INET6) &&
1586             (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
1587                 /* Can't hunt for one that has no address specified */
1588                 return (NULL);
1589         }
1590 #endif
1591         /*
1592          * ok, not bound to all so see if we can find a EP bound to this
1593          * address.
1594          */
1595         LIST_FOREACH(inp, head, sctp_hash) {
1596                 SCTP_INP_RLOCK(inp);
1597                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1598                         SCTP_INP_RUNLOCK(inp);
1599                         continue;
1600                 }
1601                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1602                         SCTP_INP_RUNLOCK(inp);
1603                         continue;
1604                 }
1605                 /*
1606                  * Ok this could be a likely candidate, look at all of its
1607                  * addresses
1608                  */
1609                 if (inp->sctp_lport != lport) {
1610                         SCTP_INP_RUNLOCK(inp);
1611                         continue;
1612                 }
1613                 /* does a VRF id match? */
1614                 fnd = 0;
1615                 if (inp->def_vrf_id == vrf_id)
1616                         fnd = 1;
1617
1618                 if (!fnd) {
1619                         SCTP_INP_RUNLOCK(inp);
1620                         continue;
1621                 }
1622                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1623                         if (laddr->ifa == NULL) {
1624                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1625                                     __FUNCTION__);
1626                                 continue;
1627                         }
1628                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1629                             laddr->ifa);
1630                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1631                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1632                                 continue;
1633                         }
1634                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1635                                 /* possible, see if it matches */
1636                                 struct sockaddr_in *intf_addr;
1637
1638                                 intf_addr = &laddr->ifa->address.sin;
1639                                 switch (nam->sa_family) {
1640                                 case AF_INET:
1641                                         if (sin->sin_addr.s_addr ==
1642                                             intf_addr->sin_addr.s_addr) {
1643                                                 SCTP_INP_RUNLOCK(inp);
1644                                                 return (inp);
1645                                         }
1646                                         break;
1647 #ifdef INET6
1648                                 case AF_INET6:
1649                                         intf_addr6 = &laddr->ifa->address.sin6;
1650                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1651                                             intf_addr6)) {
1652                                                 SCTP_INP_RUNLOCK(inp);
1653                                                 return (inp);
1654                                         }
1655                                         break;
1656 #endif
1657                                 }
1658                         }
1659                 }
1660                 SCTP_INP_RUNLOCK(inp);
1661         }
1662         return (NULL);
1663 }
1664
1665
1666 static struct sctp_inpcb *
1667 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1668 {
1669         struct sctppcbhead *head;
1670         struct sctp_inpcb *t_inp;
1671         int fnd;
1672
1673         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1674             SCTP_BASE_INFO(hashmark))];
1675         LIST_FOREACH(t_inp, head, sctp_hash) {
1676                 if (t_inp->sctp_lport != lport) {
1677                         continue;
1678                 }
1679                 /* is it in the VRF in question */
1680                 fnd = 0;
1681                 if (t_inp->def_vrf_id == vrf_id)
1682                         fnd = 1;
1683                 if (!fnd)
1684                         continue;
1685
1686                 /* This one is in use. */
1687                 /* check the v6/v4 binding issue */
1688                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1689                     SCTP_IPV6_V6ONLY(t_inp)) {
1690                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1691                                 /* collision in V6 space */
1692                                 return (t_inp);
1693                         } else {
1694                                 /* inp is BOUND_V4 no conflict */
1695                                 continue;
1696                         }
1697                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1698                         /* t_inp is bound v4 and v6, conflict always */
1699                         return (t_inp);
1700                 } else {
1701                         /* t_inp is bound only V4 */
1702                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1703                             SCTP_IPV6_V6ONLY(inp)) {
1704                                 /* no conflict */
1705                                 continue;
1706                         }
1707                         /* else fall through to conflict */
1708                 }
1709                 return (t_inp);
1710         }
1711         return (NULL);
1712 }
1713
1714
1715 int
1716 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1717 {
1718         /* For 1-2-1 with port reuse */
1719         struct sctppcbhead *head;
1720         struct sctp_inpcb *tinp;
1721
1722         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1723                 /* only works with port reuse on */
1724                 return (-1);
1725         }
1726         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1727                 return (0);
1728         }
1729         SCTP_INP_RUNLOCK(inp);
1730         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1731             SCTP_BASE_INFO(hashmark))];
1732         /* Kick out all non-listeners to the TCP hash */
1733         LIST_FOREACH(tinp, head, sctp_hash) {
1734                 if (tinp->sctp_lport != inp->sctp_lport) {
1735                         continue;
1736                 }
1737                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1738                         continue;
1739                 }
1740                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1741                         continue;
1742                 }
1743                 if (tinp->sctp_socket->so_qlimit) {
1744                         continue;
1745                 }
1746                 SCTP_INP_WLOCK(tinp);
1747                 LIST_REMOVE(tinp, sctp_hash);
1748                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1749                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1750                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1751                 SCTP_INP_WUNLOCK(tinp);
1752         }
1753         SCTP_INP_WLOCK(inp);
1754         /* Pull from where he was */
1755         LIST_REMOVE(inp, sctp_hash);
1756         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1757         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1758         LIST_INSERT_HEAD(head, inp, sctp_hash);
1759         SCTP_INP_WUNLOCK(inp);
1760         SCTP_INP_RLOCK(inp);
1761         return (0);
1762 }
1763
1764
1765 struct sctp_inpcb *
1766 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1767     uint32_t vrf_id)
1768 {
1769         /*
1770          * First we check the hash table to see if someone has this port
1771          * bound with just the port.
1772          */
1773         struct sctp_inpcb *inp;
1774         struct sctppcbhead *head;
1775         struct sockaddr_in *sin;
1776         struct sockaddr_in6 *sin6;
1777         int lport;
1778         unsigned int i;
1779
1780         if (nam->sa_family == AF_INET) {
1781                 sin = (struct sockaddr_in *)nam;
1782                 lport = ((struct sockaddr_in *)nam)->sin_port;
1783         } else if (nam->sa_family == AF_INET6) {
1784                 sin6 = (struct sockaddr_in6 *)nam;
1785                 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
1786         } else {
1787                 /* unsupported family */
1788                 return (NULL);
1789         }
1790         /*
1791          * I could cheat here and just cast to one of the types but we will
1792          * do it right. It also provides the check against an Unsupported
1793          * type too.
1794          */
1795         /* Find the head of the ALLADDR chain */
1796         if (have_lock == 0) {
1797                 SCTP_INP_INFO_RLOCK();
1798         }
1799         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1800             SCTP_BASE_INFO(hashmark))];
1801         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1802
1803         /*
1804          * If the TCP model exists it could be that the main listening
1805          * endpoint is gone but there still exists a connected socket for
1806          * this guy. If so we can return the first one that we find. This
1807          * may NOT be the correct one so the caller should be wary on the
1808          * returned INP. Currently the only caller that sets find_tcp_pool
1809          * is in bindx where we are verifying that a user CAN bind the
1810          * address. He either has bound it already, or someone else has, or
1811          * its open to bind, so this is good enough.
1812          */
1813         if (inp == NULL && find_tcp_pool) {
1814                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1815                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1816                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1817                         if (inp) {
1818                                 break;
1819                         }
1820                 }
1821         }
1822         if (inp) {
1823                 SCTP_INP_INCR_REF(inp);
1824         }
1825         if (have_lock == 0) {
1826                 SCTP_INP_INFO_RUNLOCK();
1827         }
1828         return (inp);
1829 }
1830
1831 /*
1832  * Find an association for an endpoint with the pointer to whom you want to
1833  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1834  * need to change the *to to some other struct like a mbuf...
1835  */
1836 struct sctp_tcb *
1837 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1838     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1839     uint32_t vrf_id)
1840 {
1841         struct sctp_inpcb *inp = NULL;
1842         struct sctp_tcb *retval;
1843
1844         SCTP_INP_INFO_RLOCK();
1845         if (find_tcp_pool) {
1846                 if (inp_p != NULL) {
1847                         retval = sctp_tcb_special_locate(inp_p, from, to, netp,
1848                             vrf_id);
1849                 } else {
1850                         retval = sctp_tcb_special_locate(&inp, from, to, netp,
1851                             vrf_id);
1852                 }
1853                 if (retval != NULL) {
1854                         SCTP_INP_INFO_RUNLOCK();
1855                         return (retval);
1856                 }
1857         }
1858         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1859         if (inp_p != NULL) {
1860                 *inp_p = inp;
1861         }
1862         SCTP_INP_INFO_RUNLOCK();
1863
1864         if (inp == NULL) {
1865                 return (NULL);
1866         }
1867         /*
1868          * ok, we have an endpoint, now lets find the assoc for it (if any)
1869          * we now place the source address or from in the to of the find
1870          * endpoint call. Since in reality this chain is used from the
1871          * inbound packet side.
1872          */
1873         if (inp_p != NULL) {
1874                 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1875                     NULL);
1876         } else {
1877                 retval = sctp_findassociation_ep_addr(&inp, from, netp, to,
1878                     NULL);
1879         }
1880         return retval;
1881 }
1882
1883
1884 /*
1885  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1886  * find all addresses that the sender has specified in any address list. Each
1887  * address will be used to lookup the TCB and see if one exits.
1888  */
1889 static struct sctp_tcb *
1890 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1891     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1892     struct sockaddr *dest)
1893 {
1894         struct sockaddr_in sin4;
1895         struct sockaddr_in6 sin6;
1896         struct sctp_paramhdr *phdr, parm_buf;
1897         struct sctp_tcb *retval;
1898         uint32_t ptype, plen;
1899
1900         memset(&sin4, 0, sizeof(sin4));
1901         memset(&sin6, 0, sizeof(sin6));
1902         sin4.sin_len = sizeof(sin4);
1903         sin4.sin_family = AF_INET;
1904         sin4.sin_port = sh->src_port;
1905         sin6.sin6_len = sizeof(sin6);
1906         sin6.sin6_family = AF_INET6;
1907         sin6.sin6_port = sh->src_port;
1908
1909         retval = NULL;
1910         offset += sizeof(struct sctp_init_chunk);
1911
1912         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1913         while (phdr != NULL) {
1914                 /* now we must see if we want the parameter */
1915                 ptype = ntohs(phdr->param_type);
1916                 plen = ntohs(phdr->param_length);
1917                 if (plen == 0) {
1918                         break;
1919                 }
1920                 if (ptype == SCTP_IPV4_ADDRESS &&
1921                     plen == sizeof(struct sctp_ipv4addr_param)) {
1922                         /* Get the rest of the address */
1923                         struct sctp_ipv4addr_param ip4_parm, *p4;
1924
1925                         phdr = sctp_get_next_param(m, offset,
1926                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
1927                         if (phdr == NULL) {
1928                                 return (NULL);
1929                         }
1930                         p4 = (struct sctp_ipv4addr_param *)phdr;
1931                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
1932                         /* look it up */
1933                         retval = sctp_findassociation_ep_addr(inp_p,
1934                             (struct sockaddr *)&sin4, netp, dest, NULL);
1935                         if (retval != NULL) {
1936                                 return (retval);
1937                         }
1938                 } else if (ptype == SCTP_IPV6_ADDRESS &&
1939                     plen == sizeof(struct sctp_ipv6addr_param)) {
1940                         /* Get the rest of the address */
1941                         struct sctp_ipv6addr_param ip6_parm, *p6;
1942
1943                         phdr = sctp_get_next_param(m, offset,
1944                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
1945                         if (phdr == NULL) {
1946                                 return (NULL);
1947                         }
1948                         p6 = (struct sctp_ipv6addr_param *)phdr;
1949                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
1950                         /* look it up */
1951                         retval = sctp_findassociation_ep_addr(inp_p,
1952                             (struct sockaddr *)&sin6, netp, dest, NULL);
1953                         if (retval != NULL) {
1954                                 return (retval);
1955                         }
1956                 }
1957                 offset += SCTP_SIZE32(plen);
1958                 phdr = sctp_get_next_param(m, offset, &parm_buf,
1959                     sizeof(parm_buf));
1960         }
1961         return (NULL);
1962 }
1963
1964 static struct sctp_tcb *
1965 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
1966     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
1967     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
1968 {
1969         /*
1970          * Use my vtag to hash. If we find it we then verify the source addr
1971          * is in the assoc. If all goes well we save a bit on rec of a
1972          * packet.
1973          */
1974         struct sctpasochead *head;
1975         struct sctp_nets *net;
1976         struct sctp_tcb *stcb;
1977
1978         *netp = NULL;
1979         *inp_p = NULL;
1980         SCTP_INP_INFO_RLOCK();
1981         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
1982             SCTP_BASE_INFO(hashasocmark))];
1983         if (head == NULL) {
1984                 /* invalid vtag */
1985                 SCTP_INP_INFO_RUNLOCK();
1986                 return (NULL);
1987         }
1988         LIST_FOREACH(stcb, head, sctp_asocs) {
1989                 SCTP_INP_RLOCK(stcb->sctp_ep);
1990                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1991                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1992                         continue;
1993                 }
1994                 SCTP_TCB_LOCK(stcb);
1995                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1996                 if (stcb->asoc.my_vtag == vtag) {
1997                         /* candidate */
1998                         if (stcb->rport != rport) {
1999                                 SCTP_TCB_UNLOCK(stcb);
2000                                 continue;
2001                         }
2002                         if (stcb->sctp_ep->sctp_lport != lport) {
2003                                 SCTP_TCB_UNLOCK(stcb);
2004                                 continue;
2005                         }
2006                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2007                                 SCTP_TCB_UNLOCK(stcb);
2008                                 continue;
2009                         }
2010                         /* RRS:Need toaddr check here */
2011                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2012                                 /* Endpoint does not own this address */
2013                                 SCTP_TCB_UNLOCK(stcb);
2014                                 continue;
2015                         }
2016                         if (remote_tag) {
2017                                 /*
2018                                  * If we have both vtags that's all we match
2019                                  * on
2020                                  */
2021                                 if (stcb->asoc.peer_vtag == remote_tag) {
2022                                         /*
2023                                          * If both tags match we consider it
2024                                          * conclusive and check NO
2025                                          * source/destination addresses
2026                                          */
2027                                         goto conclusive;
2028                                 }
2029                         }
2030                         if (skip_src_check) {
2031                 conclusive:
2032                                 if (from) {
2033                                         net = sctp_findnet(stcb, from);
2034                                 } else {
2035                                         *netp = NULL;   /* unknown */
2036                                 }
2037                                 if (inp_p)
2038                                         *inp_p = stcb->sctp_ep;
2039                                 SCTP_INP_INFO_RUNLOCK();
2040                                 return (stcb);
2041                         }
2042                         net = sctp_findnet(stcb, from);
2043                         if (net) {
2044                                 /* yep its him. */
2045                                 *netp = net;
2046                                 SCTP_STAT_INCR(sctps_vtagexpress);
2047                                 *inp_p = stcb->sctp_ep;
2048                                 SCTP_INP_INFO_RUNLOCK();
2049                                 return (stcb);
2050                         } else {
2051                                 /*
2052                                  * not him, this should only happen in rare
2053                                  * cases so I peg it.
2054                                  */
2055                                 SCTP_STAT_INCR(sctps_vtagbogus);
2056                         }
2057                 }
2058                 SCTP_TCB_UNLOCK(stcb);
2059         }
2060         SCTP_INP_INFO_RUNLOCK();
2061         return (NULL);
2062 }
2063
2064 /*
2065  * Find an association with the pointer to the inbound IP packet. This can be
2066  * a IPv4 or IPv6 packet.
2067  */
2068 struct sctp_tcb *
2069 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
2070     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2071     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2072 {
2073         int find_tcp_pool;
2074         struct ip *iph;
2075         struct sctp_tcb *retval;
2076         struct sockaddr_storage to_store, from_store;
2077         struct sockaddr *to = (struct sockaddr *)&to_store;
2078         struct sockaddr *from = (struct sockaddr *)&from_store;
2079         struct sctp_inpcb *inp;
2080
2081         iph = mtod(m, struct ip *);
2082         switch (iph->ip_v) {
2083         case IPVERSION:
2084                 {
2085                         /* its IPv4 */
2086                         struct sockaddr_in *from4;
2087
2088                         from4 = (struct sockaddr_in *)&from_store;
2089                         bzero(from4, sizeof(*from4));
2090                         from4->sin_family = AF_INET;
2091                         from4->sin_len = sizeof(struct sockaddr_in);
2092                         from4->sin_addr.s_addr = iph->ip_src.s_addr;
2093                         from4->sin_port = sh->src_port;
2094                         break;
2095                 }
2096 #ifdef INET6
2097         case IPV6_VERSION >> 4:
2098                 {
2099                         /* its IPv6 */
2100                         struct ip6_hdr *ip6;
2101                         struct sockaddr_in6 *from6;
2102
2103                         ip6 = mtod(m, struct ip6_hdr *);
2104                         from6 = (struct sockaddr_in6 *)&from_store;
2105                         bzero(from6, sizeof(*from6));
2106                         from6->sin6_family = AF_INET6;
2107                         from6->sin6_len = sizeof(struct sockaddr_in6);
2108                         from6->sin6_addr = ip6->ip6_src;
2109                         from6->sin6_port = sh->src_port;
2110                         /* Get the scopes in properly to the sin6 addr's */
2111                         /* we probably don't need these operations */
2112                         (void)sa6_recoverscope(from6);
2113                         sa6_embedscope(from6, MODULE_GLOBAL(ip6_use_defzone));
2114                         break;
2115                 }
2116 #endif
2117         default:
2118                 /* Currently not supported. */
2119                 return (NULL);
2120         }
2121
2122
2123         switch (iph->ip_v) {
2124         case IPVERSION:
2125                 {
2126                         /* its IPv4 */
2127                         struct sockaddr_in *to4;
2128
2129                         to4 = (struct sockaddr_in *)&to_store;
2130                         bzero(to4, sizeof(*to4));
2131                         to4->sin_family = AF_INET;
2132                         to4->sin_len = sizeof(struct sockaddr_in);
2133                         to4->sin_addr.s_addr = iph->ip_dst.s_addr;
2134                         to4->sin_port = sh->dest_port;
2135                         break;
2136                 }
2137 #ifdef INET6
2138         case IPV6_VERSION >> 4:
2139                 {
2140                         /* its IPv6 */
2141                         struct ip6_hdr *ip6;
2142                         struct sockaddr_in6 *to6;
2143
2144                         ip6 = mtod(m, struct ip6_hdr *);
2145                         to6 = (struct sockaddr_in6 *)&to_store;
2146                         bzero(to6, sizeof(*to6));
2147                         to6->sin6_family = AF_INET6;
2148                         to6->sin6_len = sizeof(struct sockaddr_in6);
2149                         to6->sin6_addr = ip6->ip6_dst;
2150                         to6->sin6_port = sh->dest_port;
2151                         /* Get the scopes in properly to the sin6 addr's */
2152                         /* we probably don't need these operations */
2153                         (void)sa6_recoverscope(to6);
2154                         sa6_embedscope(to6, MODULE_GLOBAL(ip6_use_defzone));
2155                         break;
2156                 }
2157 #endif
2158         default:
2159                 /* TSNH */
2160                 break;
2161         }
2162         if (sh->v_tag) {
2163                 /* we only go down this path if vtag is non-zero */
2164                 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag),
2165                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2166                 if (retval) {
2167                         return (retval);
2168                 }
2169         }
2170         find_tcp_pool = 0;
2171         if ((ch->chunk_type != SCTP_INITIATION) &&
2172             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2173             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2174             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2175                 /* Other chunk types go to the tcp pool. */
2176                 find_tcp_pool = 1;
2177         }
2178         if (inp_p) {
2179                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
2180                     find_tcp_pool, vrf_id);
2181                 inp = *inp_p;
2182         } else {
2183                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
2184                     find_tcp_pool, vrf_id);
2185         }
2186         SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp);
2187         if (retval == NULL && inp) {
2188                 /* Found a EP but not this address */
2189                 if ((ch->chunk_type == SCTP_INITIATION) ||
2190                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2191                         /*-
2192                          * special hook, we do NOT return linp or an
2193                          * association that is linked to an existing
2194                          * association that is under the TCP pool (i.e. no
2195                          * listener exists). The endpoint finding routine
2196                          * will always find a listener before examining the
2197                          * TCP pool.
2198                          */
2199                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2200                                 if (inp_p) {
2201                                         *inp_p = NULL;
2202                                 }
2203                                 return (NULL);
2204                         }
2205                         retval = sctp_findassociation_special_addr(m, iphlen,
2206                             offset, sh, &inp, netp, to);
2207                         if (inp_p != NULL) {
2208                                 *inp_p = inp;
2209                         }
2210                 }
2211         }
2212         SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval);
2213         return (retval);
2214 }
2215
2216 /*
2217  * lookup an association by an ASCONF lookup address.
2218  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2219  */
2220 struct sctp_tcb *
2221 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
2222     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2223 {
2224         struct sctp_tcb *stcb;
2225         struct sockaddr_in *sin;
2226
2227 #ifdef INET6
2228         struct sockaddr_in6 *sin6;
2229
2230 #endif
2231         struct sockaddr_storage local_store, remote_store;
2232         struct sockaddr *to;
2233         struct ip *iph;
2234
2235 #ifdef INET6
2236         struct ip6_hdr *ip6;
2237
2238 #endif
2239         struct sctp_paramhdr parm_buf, *phdr;
2240         int ptype;
2241         int zero_address = 0;
2242
2243
2244         memset(&local_store, 0, sizeof(local_store));
2245         memset(&remote_store, 0, sizeof(remote_store));
2246         to = (struct sockaddr *)&local_store;
2247         /* First get the destination address setup too. */
2248         iph = mtod(m, struct ip *);
2249         switch (iph->ip_v) {
2250         case IPVERSION:
2251                 /* its IPv4 */
2252                 sin = (struct sockaddr_in *)&local_store;
2253                 sin->sin_family = AF_INET;
2254                 sin->sin_len = sizeof(*sin);
2255                 sin->sin_port = sh->dest_port;
2256                 sin->sin_addr.s_addr = iph->ip_dst.s_addr;
2257                 break;
2258 #ifdef INET6
2259         case IPV6_VERSION >> 4:
2260                 /* its IPv6 */
2261                 ip6 = mtod(m, struct ip6_hdr *);
2262                 sin6 = (struct sockaddr_in6 *)&local_store;
2263                 sin6->sin6_family = AF_INET6;
2264                 sin6->sin6_len = sizeof(*sin6);
2265                 sin6->sin6_port = sh->dest_port;
2266                 sin6->sin6_addr = ip6->ip6_dst;
2267                 break;
2268 #endif
2269         default:
2270                 return NULL;
2271         }
2272
2273         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2274             &parm_buf, sizeof(struct sctp_paramhdr));
2275         if (phdr == NULL) {
2276                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2277                     __FUNCTION__);
2278                 return NULL;
2279         }
2280         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2281         /* get the correlation address */
2282         switch (ptype) {
2283 #ifdef INET6
2284         case SCTP_IPV6_ADDRESS:
2285                 {
2286                         /* ipv6 address param */
2287                         struct sctp_ipv6addr_param *p6, p6_buf;
2288
2289                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2290                                 return NULL;
2291                         }
2292                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2293                             offset + sizeof(struct sctp_asconf_chunk),
2294                             &p6_buf.ph, sizeof(*p6));
2295                         if (p6 == NULL) {
2296                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2297                                     __FUNCTION__);
2298                                 return (NULL);
2299                         }
2300                         sin6 = (struct sockaddr_in6 *)&remote_store;
2301                         sin6->sin6_family = AF_INET6;
2302                         sin6->sin6_len = sizeof(*sin6);
2303                         sin6->sin6_port = sh->src_port;
2304                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2305                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2306                                 zero_address = 1;
2307                         break;
2308                 }
2309 #endif
2310         case SCTP_IPV4_ADDRESS:
2311                 {
2312                         /* ipv4 address param */
2313                         struct sctp_ipv4addr_param *p4, p4_buf;
2314
2315                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2316                                 return NULL;
2317                         }
2318                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2319                             offset + sizeof(struct sctp_asconf_chunk),
2320                             &p4_buf.ph, sizeof(*p4));
2321                         if (p4 == NULL) {
2322                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2323                                     __FUNCTION__);
2324                                 return (NULL);
2325                         }
2326                         sin = (struct sockaddr_in *)&remote_store;
2327                         sin->sin_family = AF_INET;
2328                         sin->sin_len = sizeof(*sin);
2329                         sin->sin_port = sh->src_port;
2330                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2331                         if (sin->sin_addr.s_addr == INADDR_ANY)
2332                                 zero_address = 1;
2333                         break;
2334                 }
2335         default:
2336                 /* invalid address param type */
2337                 return NULL;
2338         }
2339
2340         if (zero_address) {
2341                 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p,
2342                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2343                 /*
2344                  * printf("findassociation_ep_asconf: zero lookup address
2345                  * finds stcb 0x%x\n", (uint32_t)stcb);
2346                  */
2347         } else {
2348                 stcb = sctp_findassociation_ep_addr(inp_p,
2349                     (struct sockaddr *)&remote_store, netp,
2350                     to, NULL);
2351         }
2352         return (stcb);
2353 }
2354
2355
2356 /*
2357  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2358  * addresses. This way if we don't get a bind we by default pick a ephemeral
2359  * port with all addresses bound.
2360  */
2361 int
2362 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2363 {
2364         /*
2365          * we get called when a new endpoint starts up. We need to allocate
2366          * the sctp_inpcb structure from the zone and init it. Mark it as
2367          * unbound and find a port that we can use as an ephemeral with
2368          * INADDR_ANY. If the user binds later no problem we can then add in
2369          * the specific addresses. And setup the default parameters for the
2370          * EP.
2371          */
2372         int i, error;
2373         struct sctp_inpcb *inp;
2374         struct sctp_pcb *m;
2375         struct timeval time;
2376         sctp_sharedkey_t *null_key;
2377
2378         error = 0;
2379
2380         SCTP_INP_INFO_WLOCK();
2381         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2382         if (inp == NULL) {
2383                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2384                 SCTP_INP_INFO_WUNLOCK();
2385                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2386                 return (ENOBUFS);
2387         }
2388         /* zap it */
2389         bzero(inp, sizeof(*inp));
2390
2391         /* bump generations */
2392         /* setup socket pointers */
2393         inp->sctp_socket = so;
2394         inp->ip_inp.inp.inp_socket = so;
2395         inp->sctp_associd_counter = 1;
2396         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2397         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2398         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2399         /* init the small hash table we use to track asocid <-> tcb */
2400         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2401         if (inp->sctp_asocidhash == NULL) {
2402                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2403                 SCTP_INP_INFO_WUNLOCK();
2404                 return (ENOBUFS);
2405         }
2406 #ifdef IPSEC
2407         {
2408                 struct inpcbpolicy *pcb_sp = NULL;
2409
2410                 error = ipsec_init_policy(so, &pcb_sp);
2411                 /* Arrange to share the policy */
2412                 inp->ip_inp.inp.inp_sp = pcb_sp;
2413                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2414         }
2415         if (error != 0) {
2416                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2417                 SCTP_INP_INFO_WUNLOCK();
2418                 return error;
2419         }
2420 #endif                          /* IPSEC */
2421         SCTP_INCR_EP_COUNT();
2422         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2423         SCTP_INP_INFO_WUNLOCK();
2424
2425         so->so_pcb = (caddr_t)inp;
2426
2427         if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) ||
2428             (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) {
2429                 /* UDP style socket */
2430                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2431                     SCTP_PCB_FLAGS_UNBOUND);
2432                 /* Be sure it is NON-BLOCKING IO for UDP */
2433                 /* SCTP_SET_SO_NBIO(so); */
2434         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2435                 /* TCP style socket */
2436                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2437                     SCTP_PCB_FLAGS_UNBOUND);
2438                 /* Be sure we have blocking IO by default */
2439                 SCTP_CLEAR_SO_NBIO(so);
2440         } else {
2441                 /*
2442                  * unsupported socket type (RAW, etc)- in case we missed it
2443                  * in protosw
2444                  */
2445                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2446                 so->so_pcb = NULL;
2447                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2448                 return (EOPNOTSUPP);
2449         }
2450         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2451                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2452                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2453         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2454                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2455                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2456         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2457                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2458                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2459         }
2460         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2461             &inp->sctp_hashmark);
2462         if (inp->sctp_tcbhash == NULL) {
2463                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2464                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2465                 so->so_pcb = NULL;
2466                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2467                 return (ENOBUFS);
2468         }
2469         inp->def_vrf_id = vrf_id;
2470
2471         SCTP_INP_INFO_WLOCK();
2472         SCTP_INP_LOCK_INIT(inp);
2473         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2474         SCTP_INP_READ_INIT(inp);
2475         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2476         /* lock the new ep */
2477         SCTP_INP_WLOCK(inp);
2478
2479         /* add it to the info area */
2480         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2481         SCTP_INP_INFO_WUNLOCK();
2482
2483         TAILQ_INIT(&inp->read_queue);
2484         LIST_INIT(&inp->sctp_addr_list);
2485
2486         LIST_INIT(&inp->sctp_asoc_list);
2487
2488 #ifdef SCTP_TRACK_FREED_ASOCS
2489         /* TEMP CODE */
2490         LIST_INIT(&inp->sctp_asoc_free_list);
2491 #endif
2492         /* Init the timer structure for signature change */
2493         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2494         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2495
2496         /* now init the actual endpoint default data */
2497         m = &inp->sctp_ep;
2498
2499         /* setup the base timeout information */
2500         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2501         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2502         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2503         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2504         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2505         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2506         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2507         /* all max/min max are in ms */
2508         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2509         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2510         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2511         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2512         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2513
2514         m->max_open_streams_intome = MAX_SCTP_STREAMS;
2515
2516         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2517         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2518         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2519         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2520         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2521         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2522         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2523
2524         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2525         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2526         /* number of streams to pre-open on a association */
2527         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2528
2529         /* Add adaptation cookie */
2530         m->adaptation_layer_indicator = 0x504C5253;
2531
2532         /* seed random number generator */
2533         m->random_counter = 1;
2534         m->store_at = SCTP_SIGNATURE_SIZE;
2535         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2536         sctp_fill_random_store(m);
2537
2538         /* Minimum cookie size */
2539         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2540             sizeof(struct sctp_state_cookie);
2541         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2542
2543         /* Setup the initial secret */
2544         (void)SCTP_GETTIME_TIMEVAL(&time);
2545         m->time_of_secret_change = time.tv_sec;
2546
2547         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2548                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2549         }
2550         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2551
2552         /* How long is a cookie good for ? */
2553         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2554         /*
2555          * Initialize authentication parameters
2556          */
2557         m->local_hmacs = sctp_default_supported_hmaclist();
2558         m->local_auth_chunks = sctp_alloc_chunklist();
2559         sctp_auth_set_default_chunks(m->local_auth_chunks);
2560         LIST_INIT(&m->shared_keys);
2561         /* add default NULL key as key id 0 */
2562         null_key = sctp_alloc_sharedkey();
2563         sctp_insert_sharedkey(&m->shared_keys, null_key);
2564         SCTP_INP_WUNLOCK(inp);
2565 #ifdef SCTP_LOG_CLOSING
2566         sctp_log_closing(inp, NULL, 12);
2567 #endif
2568         return (error);
2569 }
2570
2571
2572 void
2573 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2574     struct sctp_tcb *stcb)
2575 {
2576         struct sctp_nets *net;
2577         uint16_t lport, rport;
2578         struct sctppcbhead *head;
2579         struct sctp_laddr *laddr, *oladdr;
2580
2581         atomic_add_int(&stcb->asoc.refcnt, 1);
2582         SCTP_TCB_UNLOCK(stcb);
2583         SCTP_INP_INFO_WLOCK();
2584         SCTP_INP_WLOCK(old_inp);
2585         SCTP_INP_WLOCK(new_inp);
2586         SCTP_TCB_LOCK(stcb);
2587         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2588
2589         new_inp->sctp_ep.time_of_secret_change =
2590             old_inp->sctp_ep.time_of_secret_change;
2591         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2592             sizeof(old_inp->sctp_ep.secret_key));
2593         new_inp->sctp_ep.current_secret_number =
2594             old_inp->sctp_ep.current_secret_number;
2595         new_inp->sctp_ep.last_secret_number =
2596             old_inp->sctp_ep.last_secret_number;
2597         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2598
2599         /* make it so new data pours into the new socket */
2600         stcb->sctp_socket = new_inp->sctp_socket;
2601         stcb->sctp_ep = new_inp;
2602
2603         /* Copy the port across */
2604         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2605         rport = stcb->rport;
2606         /* Pull the tcb from the old association */
2607         LIST_REMOVE(stcb, sctp_tcbhash);
2608         LIST_REMOVE(stcb, sctp_tcblist);
2609         if (stcb->asoc.in_asocid_hash) {
2610                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2611         }
2612         /* Now insert the new_inp into the TCP connected hash */
2613         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2614
2615         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2616         /* Its safe to access */
2617         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2618
2619         /* Now move the tcb into the endpoint list */
2620         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2621         /*
2622          * Question, do we even need to worry about the ep-hash since we
2623          * only have one connection? Probably not :> so lets get rid of it
2624          * and not suck up any kernel memory in that.
2625          */
2626         if (stcb->asoc.in_asocid_hash) {
2627                 struct sctpasochead *lhd;
2628
2629                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2630                     new_inp->hashasocidmark)];
2631                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2632         }
2633         /* Ok. Let's restart timer. */
2634         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2635                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2636                     stcb, net);
2637         }
2638
2639         SCTP_INP_INFO_WUNLOCK();
2640         if (new_inp->sctp_tcbhash != NULL) {
2641                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2642                 new_inp->sctp_tcbhash = NULL;
2643         }
2644         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2645                 /* Subset bound, so copy in the laddr list from the old_inp */
2646                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2647                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2648                         if (laddr == NULL) {
2649                                 /*
2650                                  * Gak, what can we do? This assoc is really
2651                                  * HOSED. We probably should send an abort
2652                                  * here.
2653                                  */
2654                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2655                                 continue;
2656                         }
2657                         SCTP_INCR_LADDR_COUNT();
2658                         bzero(laddr, sizeof(*laddr));
2659                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2660                         laddr->ifa = oladdr->ifa;
2661                         atomic_add_int(&laddr->ifa->refcount, 1);
2662                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2663                             sctp_nxt_addr);
2664                         new_inp->laddr_count++;
2665                 }
2666         }
2667         /*
2668          * Now any running timers need to be adjusted since we really don't
2669          * care if they are running or not just blast in the new_inp into
2670          * all of them.
2671          */
2672
2673         stcb->asoc.hb_timer.ep = (void *)new_inp;
2674         stcb->asoc.dack_timer.ep = (void *)new_inp;
2675         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2676         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2677         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2678         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2679         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2680         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2681         /* now what about the nets? */
2682         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2683                 net->pmtu_timer.ep = (void *)new_inp;
2684                 net->rxt_timer.ep = (void *)new_inp;
2685                 net->fr_timer.ep = (void *)new_inp;
2686         }
2687         SCTP_INP_WUNLOCK(new_inp);
2688         SCTP_INP_WUNLOCK(old_inp);
2689 }
2690
2691
2692
2693
2694 /* sctp_ifap is used to bypass normal local address validation checks */
2695 int
2696 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2697     struct sctp_ifa *sctp_ifap, struct thread *p)
2698 {
2699         /* bind a ep to a socket address */
2700         struct sctppcbhead *head;
2701         struct sctp_inpcb *inp, *inp_tmp;
2702         struct inpcb *ip_inp;
2703         int port_reuse_active = 0;
2704         int bindall;
2705         uint16_t lport;
2706         int error;
2707         uint32_t vrf_id;
2708
2709         lport = 0;
2710         error = 0;
2711         bindall = 1;
2712         inp = (struct sctp_inpcb *)so->so_pcb;
2713         ip_inp = (struct inpcb *)so->so_pcb;
2714 #ifdef SCTP_DEBUG
2715         if (addr) {
2716                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
2717                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2718                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
2719                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2720         }
2721 #endif
2722         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2723                 /* already did a bind, subsequent binds NOT allowed ! */
2724                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2725                 return (EINVAL);
2726         }
2727 #ifdef INVARIANTS
2728         if (p == NULL)
2729                 panic("null proc/thread");
2730 #endif
2731         if (addr != NULL) {
2732                 switch (addr->sa_family) {
2733                 case AF_INET:
2734                         {
2735                                 struct sockaddr_in *sin;
2736
2737                                 /* IPV6_V6ONLY socket? */
2738                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2739                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2740                                         return (EINVAL);
2741                                 }
2742                                 if (addr->sa_len != sizeof(*sin)) {
2743                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2744                                         return (EINVAL);
2745                                 }
2746                                 sin = (struct sockaddr_in *)addr;
2747                                 lport = sin->sin_port;
2748                                 /*
2749                                  * For LOOPBACK the prison_local_ip4() call
2750                                  * will transmute the ip address to the
2751                                  * proper value.
2752                                  */
2753                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2754                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2755                                         return (error);
2756                                 }
2757                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2758                                         bindall = 0;
2759                                 }
2760                                 break;
2761                         }
2762 #ifdef INET6
2763                 case AF_INET6:
2764                         {
2765                                 /*
2766                                  * Only for pure IPv6 Address. (No IPv4
2767                                  * Mapped!)
2768                                  */
2769                                 struct sockaddr_in6 *sin6;
2770
2771                                 sin6 = (struct sockaddr_in6 *)addr;
2772
2773                                 if (addr->sa_len != sizeof(*sin6)) {
2774                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2775                                         return (EINVAL);
2776                                 }
2777                                 lport = sin6->sin6_port;
2778
2779                                 /*
2780                                  * For LOOPBACK the prison_local_ip6() call
2781                                  * will transmute the ipv6 address to the
2782                                  * proper value.
2783                                  */
2784                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2785                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2786                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2787                                         return (error);
2788                                 }
2789                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2790                                         bindall = 0;
2791                                         /* KAME hack: embed scopeid */
2792                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2793                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2794                                                 return (EINVAL);
2795                                         }
2796                                 }
2797                                 /* this must be cleared for ifa_ifwithaddr() */
2798                                 sin6->sin6_scope_id = 0;
2799                                 break;
2800                         }
2801 #endif
2802                 default:
2803                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2804                         return (EAFNOSUPPORT);
2805                 }
2806         }
2807         SCTP_INP_INFO_WLOCK();
2808         SCTP_INP_WLOCK(inp);
2809         /* Setup a vrf_id to be the default for the non-bind-all case. */
2810         vrf_id = inp->def_vrf_id;
2811
2812         /* increase our count due to the unlock we do */
2813         SCTP_INP_INCR_REF(inp);
2814         if (lport) {
2815                 /*
2816                  * Did the caller specify a port? if so we must see if a ep
2817                  * already has this one bound.
2818                  */
2819                 /* got to be root to get at low ports */
2820                 if (ntohs(lport) < IPPORT_RESERVED) {
2821                         if (p && (error =
2822                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2823                             )) {
2824                                 SCTP_INP_DECR_REF(inp);
2825                                 SCTP_INP_WUNLOCK(inp);
2826                                 SCTP_INP_INFO_WUNLOCK();
2827                                 return (error);
2828                         }
2829                 }
2830                 if (p == NULL) {
2831                         SCTP_INP_DECR_REF(inp);
2832                         SCTP_INP_WUNLOCK(inp);
2833                         SCTP_INP_INFO_WUNLOCK();
2834                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2835                         return (error);
2836                 }
2837                 SCTP_INP_WUNLOCK(inp);
2838                 if (bindall) {
2839                         vrf_id = inp->def_vrf_id;
2840                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2841                         if (inp_tmp != NULL) {
2842                                 /*
2843                                  * lock guy returned and lower count note
2844                                  * that we are not bound so inp_tmp should
2845                                  * NEVER be inp. And it is this inp
2846                                  * (inp_tmp) that gets the reference bump,
2847                                  * so we must lower it.
2848                                  */
2849                                 SCTP_INP_DECR_REF(inp_tmp);
2850                                 /* unlock info */
2851                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2852                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2853                                         /*
2854                                          * Ok, must be one-2-one and
2855                                          * allowing port re-use
2856                                          */
2857                                         port_reuse_active = 1;
2858                                         goto continue_anyway;
2859                                 }
2860                                 SCTP_INP_DECR_REF(inp);
2861                                 SCTP_INP_INFO_WUNLOCK();
2862                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2863                                 return (EADDRINUSE);
2864                         }
2865                 } else {
2866                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2867                         if (inp_tmp != NULL) {
2868                                 /*
2869                                  * lock guy returned and lower count note
2870                                  * that we are not bound so inp_tmp should
2871                                  * NEVER be inp. And it is this inp
2872                                  * (inp_tmp) that gets the reference bump,
2873                                  * so we must lower it.
2874                                  */
2875                                 SCTP_INP_DECR_REF(inp_tmp);
2876                                 /* unlock info */
2877                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2878                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2879                                         /*
2880                                          * Ok, must be one-2-one and
2881                                          * allowing port re-use
2882                                          */
2883                                         port_reuse_active = 1;
2884                                         goto continue_anyway;
2885                                 }
2886                                 SCTP_INP_DECR_REF(inp);
2887                                 SCTP_INP_INFO_WUNLOCK();
2888                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2889                                 return (EADDRINUSE);
2890                         }
2891                 }
2892 continue_anyway:
2893                 SCTP_INP_WLOCK(inp);
2894                 if (bindall) {
2895                         /* verify that no lport is not used by a singleton */
2896                         if ((port_reuse_active == 0) &&
2897                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))
2898                             ) {
2899                                 /* Sorry someone already has this one bound */
2900                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2901                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2902                                         port_reuse_active = 1;
2903                                 } else {
2904                                         SCTP_INP_DECR_REF(inp);
2905                                         SCTP_INP_WUNLOCK(inp);
2906                                         SCTP_INP_INFO_WUNLOCK();
2907                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2908                                         return (EADDRINUSE);
2909                                 }
2910                         }
2911                 }
2912         } else {
2913                 uint16_t first, last, candidate;
2914                 uint16_t count;
2915                 int done;
2916
2917                 if (ip_inp->inp_flags & INP_HIGHPORT) {
2918                         first = MODULE_GLOBAL(ipport_hifirstauto);
2919                         last = MODULE_GLOBAL(ipport_hilastauto);
2920                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2921                         if (p && (error =
2922                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2923                             )) {
2924                                 SCTP_INP_DECR_REF(inp);
2925                                 SCTP_INP_WUNLOCK(inp);
2926                                 SCTP_INP_INFO_WUNLOCK();
2927                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2928                                 return (error);
2929                         }
2930                         first = MODULE_GLOBAL(ipport_lowfirstauto);
2931                         last = MODULE_GLOBAL(ipport_lowlastauto);
2932                 } else {
2933                         first = MODULE_GLOBAL(ipport_firstauto);
2934                         last = MODULE_GLOBAL(ipport_lastauto);
2935                 }
2936                 if (first > last) {
2937                         uint16_t temp;
2938
2939                         temp = first;
2940                         first = last;
2941                         last = temp;
2942                 }
2943                 count = last - first + 1;       /* number of candidates */
2944                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2945
2946                 done = 0;
2947                 while (!done) {
2948                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
2949                                 done = 1;
2950                         }
2951                         if (!done) {
2952                                 if (--count == 0) {
2953                                         SCTP_INP_DECR_REF(inp);
2954                                         SCTP_INP_WUNLOCK(inp);
2955                                         SCTP_INP_INFO_WUNLOCK();
2956                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2957                                         return (EADDRINUSE);
2958                                 }
2959                                 if (candidate == last)
2960                                         candidate = first;
2961                                 else
2962                                         candidate = candidate + 1;
2963                         }
2964                 }
2965                 lport = htons(candidate);
2966         }
2967         SCTP_INP_DECR_REF(inp);
2968         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2969             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2970                 /*
2971                  * this really should not happen. The guy did a non-blocking
2972                  * bind and then did a close at the same time.
2973                  */
2974                 SCTP_INP_WUNLOCK(inp);
2975                 SCTP_INP_INFO_WUNLOCK();
2976                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2977                 return (EINVAL);
2978         }
2979         /* ok we look clear to give out this port, so lets setup the binding */
2980         if (bindall) {
2981                 /* binding to all addresses, so just set in the proper flags */
2982                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
2983                 /* set the automatic addr changes from kernel flag */
2984                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
2985                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2986                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2987                 } else {
2988                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2989                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2990                 }
2991                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
2992                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2993                 } else {
2994                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2995                 }
2996                 /*
2997                  * set the automatic mobility_base from kernel flag (by
2998                  * micchie)
2999                  */
3000                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3001                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3002                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3003                 } else {
3004                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3005                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3006                 }
3007                 /*
3008                  * set the automatic mobility_fasthandoff from kernel flag
3009                  * (by micchie)
3010                  */
3011                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3012                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3013                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3014                 } else {
3015                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3016                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3017                 }
3018         } else {
3019                 /*
3020                  * bind specific, make sure flags is off and add a new
3021                  * address structure to the sctp_addr_list inside the ep
3022                  * structure.
3023                  *
3024                  * We will need to allocate one and insert it at the head. The
3025                  * socketopt call can just insert new addresses in there as
3026                  * well. It will also have to do the embed scope kame hack
3027                  * too (before adding).
3028                  */
3029                 struct sctp_ifa *ifa;
3030                 struct sockaddr_storage store_sa;
3031
3032                 memset(&store_sa, 0, sizeof(store_sa));
3033                 if (addr->sa_family == AF_INET) {
3034                         struct sockaddr_in *sin;
3035
3036                         sin = (struct sockaddr_in *)&store_sa;
3037                         memcpy(sin, addr, sizeof(struct sockaddr_in));
3038                         sin->sin_port = 0;
3039                 } else if (addr->sa_family == AF_INET6) {
3040                         struct sockaddr_in6 *sin6;
3041
3042                         sin6 = (struct sockaddr_in6 *)&store_sa;
3043                         memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3044                         sin6->sin6_port = 0;
3045                 }
3046                 /*
3047                  * first find the interface with the bound address need to
3048                  * zero out the port to find the address! yuck! can't do
3049                  * this earlier since need port for sctp_pcb_findep()
3050                  */
3051                 if (sctp_ifap != NULL)
3052                         ifa = sctp_ifap;
3053                 else {
3054                         /*
3055                          * Note for BSD we hit here always other O/S's will
3056                          * pass things in via the sctp_ifap argument
3057                          * (Panda).
3058                          */
3059                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3060                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3061                 }
3062                 if (ifa == NULL) {
3063                         /* Can't find an interface with that address */
3064                         SCTP_INP_WUNLOCK(inp);
3065                         SCTP_INP_INFO_WUNLOCK();
3066                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3067                         return (EADDRNOTAVAIL);
3068                 }
3069                 if (addr->sa_family == AF_INET6) {
3070                         /* GAK, more FIXME IFA lock? */
3071                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3072                                 /* Can't bind a non-existent addr. */
3073                                 SCTP_INP_WUNLOCK(inp);
3074                                 SCTP_INP_INFO_WUNLOCK();
3075                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3076                                 return (EINVAL);
3077                         }
3078                 }
3079                 /* we're not bound all */
3080                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3081                 /* allow bindx() to send ASCONF's for binding changes */
3082                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3083                 /* clear automatic addr changes from kernel flag */
3084                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3085
3086                 /* add this address to the endpoint list */
3087                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3088                 if (error != 0) {
3089                         SCTP_INP_WUNLOCK(inp);
3090                         SCTP_INP_INFO_WUNLOCK();
3091                         return (error);
3092                 }
3093                 inp->laddr_count++;
3094         }
3095         /* find the bucket */
3096         if (port_reuse_active) {
3097                 /* Put it into tcp 1-2-1 hash */
3098                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3099                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3100         } else {
3101                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3102         }
3103         /* put it in the bucket */
3104         LIST_INSERT_HEAD(head, inp, sctp_hash);
3105         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3106             head, ntohs(lport), port_reuse_active);
3107         /* set in the port */
3108         inp->sctp_lport = lport;
3109
3110         /* turn off just the unbound flag */
3111         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3112         SCTP_INP_WUNLOCK(inp);
3113         SCTP_INP_INFO_WUNLOCK();
3114         return (0);
3115 }
3116
3117
3118 static void
3119 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3120 {
3121         struct sctp_iterator *it, *nit;
3122
3123         /*
3124          * We enter with the only the ITERATOR_LOCK in place and a write
3125          * lock on the inp_info stuff.
3126          */
3127         it = sctp_it_ctl.cur_it;
3128         if (it && (it->vn != curvnet)) {
3129                 /* Its not looking at our VNET */
3130                 return;
3131         }
3132         if (it && (it->inp == inp)) {
3133                 /*
3134                  * This is tricky and we hold the iterator lock, but when it
3135                  * returns and gets the lock (when we release it) the
3136                  * iterator will try to operate on inp. We need to stop that
3137                  * from happening. But of course the iterator has a
3138                  * reference on the stcb and inp. We can mark it and it will
3139                  * stop.
3140                  *
3141                  * If its a single iterator situation, we set the end iterator
3142                  * flag. Otherwise we set the iterator to go to the next
3143                  * inp.
3144                  *
3145                  */
3146                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3147                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3148                 } else {
3149                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3150                 }
3151         }
3152         /*
3153          * Now go through and remove any single reference to our inp that
3154          * may be still pending on the list
3155          */
3156         SCTP_IPI_ITERATOR_WQ_LOCK();
3157         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3158                 if (it->vn != curvnet) {
3159                         continue;
3160                 }
3161                 if (it->inp == inp) {
3162                         /* This one points to me is it inp specific? */
3163                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3164                                 /* Remove and free this one */
3165                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3166                                     it, sctp_nxt_itr);
3167                                 if (it->function_atend != NULL) {
3168                                         (*it->function_atend) (it->pointer, it->val);
3169                                 }
3170                                 SCTP_FREE(it, SCTP_M_ITER);
3171                         } else {
3172                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3173                                 if (it->inp) {
3174                                         SCTP_INP_INCR_REF(it->inp);
3175                                 }
3176                         }
3177                         /*
3178                          * When its put in the refcnt is incremented so decr
3179                          * it
3180                          */
3181                         SCTP_INP_DECR_REF(inp);
3182                 }
3183         }
3184         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3185 }
3186
3187 /* release sctp_inpcb unbind the port */
3188 void
3189 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3190 {
3191         /*
3192          * Here we free a endpoint. We must find it (if it is in the Hash
3193          * table) and remove it from there. Then we must also find it in the
3194          * overall list and remove it from there. After all removals are
3195          * complete then any timer has to be stopped. Then start the actual
3196          * freeing. a) Any local lists. b) Any associations. c) The hash of
3197          * all associations. d) finally the ep itself.
3198          */
3199         struct sctp_pcb *m;
3200         struct sctp_tcb *asoc, *nasoc;
3201         struct sctp_laddr *laddr, *nladdr;
3202         struct inpcb *ip_pcb;
3203         struct socket *so;
3204         int being_refed = 0;
3205         struct sctp_queued_to_read *sq, *nsq;
3206         int cnt;
3207         sctp_sharedkey_t *shared_key, *nshared_key;
3208
3209
3210 #ifdef SCTP_LOG_CLOSING
3211         sctp_log_closing(inp, NULL, 0);
3212 #endif
3213         SCTP_ITERATOR_LOCK();
3214         /* mark any iterators on the list or being processed */
3215         sctp_iterator_inp_being_freed(inp);
3216         SCTP_ITERATOR_UNLOCK();
3217         so = inp->sctp_socket;
3218         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3219                 /* been here before.. eeks.. get out of here */
3220                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3221 #ifdef SCTP_LOG_CLOSING
3222                 sctp_log_closing(inp, NULL, 1);
3223 #endif
3224                 return;
3225         }
3226         SCTP_ASOC_CREATE_LOCK(inp);
3227         SCTP_INP_INFO_WLOCK();
3228
3229         SCTP_INP_WLOCK(inp);
3230         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3231                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3232                 /* socket is gone, so no more wakeups allowed */
3233                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3234                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3235                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3236
3237         }
3238         /* First time through we have the socket lock, after that no more. */
3239         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3240             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3241
3242         if (inp->control) {
3243                 sctp_m_freem(inp->control);
3244                 inp->control = NULL;
3245         }
3246         if (inp->pkt) {
3247                 sctp_m_freem(inp->pkt);
3248                 inp->pkt = NULL;
3249         }
3250         m = &inp->sctp_ep;
3251         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3252                                          * here but I will be nice :> (i.e.
3253                                          * ip_pcb = ep;) */
3254         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3255                 int cnt_in_sd;
3256
3257                 cnt_in_sd = 0;
3258                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3259                         SCTP_TCB_LOCK(asoc);
3260                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3261                                 /* Skip guys being freed */
3262                                 cnt_in_sd++;
3263                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3264                                         /*
3265                                          * Special case - we did not start a
3266                                          * kill timer on the asoc due to it
3267                                          * was not closed. So go ahead and
3268                                          * start it now.
3269                                          */
3270                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3271                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3272                                 }
3273                                 SCTP_TCB_UNLOCK(asoc);
3274                                 continue;
3275                         }
3276                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3277                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3278                             (asoc->asoc.total_output_queue_size == 0)) {
3279                                 /*
3280                                  * If we have data in queue, we don't want
3281                                  * to just free since the app may have done,
3282                                  * send()/close or connect/send/close. And
3283                                  * it wants the data to get across first.
3284                                  */
3285                                 /* Just abandon things in the front states */
3286                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3287                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3288                                         cnt_in_sd++;
3289                                 }
3290                                 continue;
3291                         }
3292                         /* Disconnect the socket please */
3293                         asoc->sctp_socket = NULL;
3294                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3295                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3296                             (asoc->asoc.control_pdapi) ||
3297                             (asoc->asoc.size_on_all_streams > 0) ||
3298                             (so && (so->so_rcv.sb_cc > 0))
3299                             ) {
3300                                 /* Left with Data unread */
3301                                 struct mbuf *op_err;
3302
3303                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3304                                     0, M_DONTWAIT, 1, MT_DATA);
3305                                 if (op_err) {
3306                                         /* Fill in the user initiated abort */
3307                                         struct sctp_paramhdr *ph;
3308                                         uint32_t *ippp;
3309
3310                                         SCTP_BUF_LEN(op_err) =
3311                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
3312                                         ph = mtod(op_err,
3313                                             struct sctp_paramhdr *);
3314                                         ph->param_type = htons(
3315                                             SCTP_CAUSE_USER_INITIATED_ABT);
3316                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
3317                                         ippp = (uint32_t *) (ph + 1);
3318                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
3319                                 }
3320                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3321 #if defined(SCTP_PANIC_ON_ABORT)
3322                                 panic("inpcb_free does an abort");
3323 #endif
3324                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3325                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3326                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3327                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3328                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3329                                 }
3330                                 if (sctp_free_assoc(inp, asoc,
3331                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3332                                         cnt_in_sd++;
3333                                 }
3334                                 continue;
3335                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3336                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3337                                     (asoc->asoc.stream_queue_cnt == 0)
3338                             ) {
3339                                 if (asoc->asoc.locked_on_sending) {
3340                                         goto abort_anyway;
3341                                 }
3342                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3343                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3344                                         /*
3345                                          * there is nothing queued to send,
3346                                          * so I send shutdown
3347                                          */
3348                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
3349                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3350                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3351                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3352                                         }
3353                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3354                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3355                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3356                                             asoc->asoc.primary_destination);
3357                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3358                                             asoc->asoc.primary_destination);
3359                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3360                                 }
3361                         } else {
3362                                 /* mark into shutdown pending */
3363                                 struct sctp_stream_queue_pending *sp;
3364
3365                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3366                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3367                                     asoc->asoc.primary_destination);
3368                                 if (asoc->asoc.locked_on_sending) {
3369                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3370                                             sctp_streamhead);
3371                                         if (sp == NULL) {
3372                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3373                                                     asoc->asoc.locked_on_sending,
3374                                                     asoc->asoc.locked_on_sending->stream_no);
3375                                         } else {
3376                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3377                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3378                                         }
3379                                 }
3380                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3381                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3382                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3383                                         struct mbuf *op_err;
3384
3385                         abort_anyway:
3386                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3387                                             0, M_DONTWAIT, 1, MT_DATA);
3388                                         if (op_err) {
3389                                                 /*
3390                                                  * Fill in the user
3391                                                  * initiated abort
3392                                                  */
3393                                                 struct sctp_paramhdr *ph;
3394                                                 uint32_t *ippp;
3395
3396                                                 SCTP_BUF_LEN(op_err) =
3397                                                     (sizeof(struct sctp_paramhdr) +
3398                                                     sizeof(uint32_t));
3399                                                 ph = mtod(op_err,
3400                                                     struct sctp_paramhdr *);
3401                                                 ph->param_type = htons(
3402                                                     SCTP_CAUSE_USER_INITIATED_ABT);
3403                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3404                                                 ippp = (uint32_t *) (ph + 1);
3405                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
3406                                         }
3407                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3408 #if defined(SCTP_PANIC_ON_ABORT)
3409                                         panic("inpcb_free does an abort");
3410 #endif
3411
3412                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3413                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3414                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3415                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3416                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3417                                         }
3418                                         if (sctp_free_assoc(inp, asoc,
3419                                             SCTP_PCBFREE_NOFORCE,
3420                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3421                                                 cnt_in_sd++;
3422                                         }
3423                                         continue;
3424                                 } else {
3425                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3426                                 }
3427                         }
3428                         cnt_in_sd++;
3429                         SCTP_TCB_UNLOCK(asoc);
3430                 }
3431                 /* now is there some left in our SHUTDOWN state? */
3432                 if (cnt_in_sd) {
3433 #ifdef SCTP_LOG_CLOSING
3434                         sctp_log_closing(inp, NULL, 2);
3435 #endif
3436                         inp->sctp_socket = NULL;
3437                         SCTP_INP_WUNLOCK(inp);
3438                         SCTP_ASOC_CREATE_UNLOCK(inp);
3439                         SCTP_INP_INFO_WUNLOCK();
3440                         return;
3441                 }
3442         }
3443         inp->sctp_socket = NULL;
3444         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3445             SCTP_PCB_FLAGS_UNBOUND) {
3446                 /*
3447                  * ok, this guy has been bound. It's port is somewhere in
3448                  * the SCTP_BASE_INFO(hash table). Remove it!
3449                  */
3450                 LIST_REMOVE(inp, sctp_hash);
3451                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3452         }
3453         /*
3454          * If there is a timer running to kill us, forget it, since it may
3455          * have a contest on the INP lock.. which would cause us to die ...
3456          */
3457         cnt = 0;
3458         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3459                 SCTP_TCB_LOCK(asoc);
3460                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3461                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3462                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3463                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3464                         }
3465                         cnt++;
3466                         SCTP_TCB_UNLOCK(asoc);
3467                         continue;
3468                 }
3469                 /* Free associations that are NOT killing us */
3470                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3471                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3472                         struct mbuf *op_err;
3473                         uint32_t *ippp;
3474
3475                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3476                             0, M_DONTWAIT, 1, MT_DATA);
3477                         if (op_err) {
3478                                 /* Fill in the user initiated abort */
3479                                 struct sctp_paramhdr *ph;
3480
3481                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
3482                                     sizeof(uint32_t));
3483                                 ph = mtod(op_err, struct sctp_paramhdr *);
3484                                 ph->param_type = htons(
3485                                     SCTP_CAUSE_USER_INITIATED_ABT);
3486                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3487                                 ippp = (uint32_t *) (ph + 1);
3488                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
3489
3490                         }
3491                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3492 #if defined(SCTP_PANIC_ON_ABORT)
3493                         panic("inpcb_free does an abort");
3494 #endif
3495                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3496                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3497                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3498                         cnt++;
3499                         SCTP_TCB_UNLOCK(asoc);
3500                         continue;
3501                 }
3502                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3503                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3504                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3505                 }
3506                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3507                         cnt++;
3508                 }
3509         }
3510         if (cnt) {
3511                 /* Ok we have someone out there that will kill us */
3512                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3513 #ifdef SCTP_LOG_CLOSING
3514                 sctp_log_closing(inp, NULL, 3);
3515 #endif
3516                 SCTP_INP_WUNLOCK(inp);
3517                 SCTP_ASOC_CREATE_UNLOCK(inp);
3518                 SCTP_INP_INFO_WUNLOCK();
3519                 return;
3520         }
3521         if (SCTP_INP_LOCK_CONTENDED(inp))
3522                 being_refed++;
3523         if (SCTP_INP_READ_CONTENDED(inp))
3524                 being_refed++;
3525         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3526                 being_refed++;
3527
3528         if ((inp->refcount) ||
3529             (being_refed) ||
3530             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3531                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3532 #ifdef SCTP_LOG_CLOSING
3533                 sctp_log_closing(inp, NULL, 4);
3534 #endif
3535                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3536                 SCTP_INP_WUNLOCK(inp);
3537                 SCTP_ASOC_CREATE_UNLOCK(inp);
3538                 SCTP_INP_INFO_WUNLOCK();
3539                 return;
3540         }
3541         inp->sctp_ep.signature_change.type = 0;
3542         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3543         /*
3544          * Remove it from the list .. last thing we need a lock for.
3545          */
3546         LIST_REMOVE(inp, sctp_list);
3547         SCTP_INP_WUNLOCK(inp);
3548         SCTP_ASOC_CREATE_UNLOCK(inp);
3549         SCTP_INP_INFO_WUNLOCK();
3550         /*
3551          * Now we release all locks. Since this INP cannot be found anymore
3552          * except possibly by the kill timer that might be running. We call
3553          * the drain function here. It should hit the case were it sees the
3554          * ACTIVE flag cleared and exit out freeing us to proceed and
3555          * destroy everything.
3556          */
3557         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3558                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3559         } else {
3560                 /* Probably un-needed */
3561                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3562         }
3563
3564 #ifdef SCTP_LOG_CLOSING
3565         sctp_log_closing(inp, NULL, 5);
3566 #endif
3567
3568
3569         if ((inp->sctp_asocidhash) != NULL) {
3570                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3571                 inp->sctp_asocidhash = NULL;
3572         }
3573         /* sa_ignore FREED_MEMORY */
3574         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3575                 /* Its only abandoned if it had data left */
3576                 if (sq->length)
3577                         SCTP_STAT_INCR(sctps_left_abandon);
3578
3579                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3580                 sctp_free_remote_addr(sq->whoFrom);
3581                 if (so)
3582                         so->so_rcv.sb_cc -= sq->length;
3583                 if (sq->data) {
3584                         sctp_m_freem(sq->data);
3585                         sq->data = NULL;
3586                 }
3587                 /*
3588                  * no need to free the net count, since at this point all
3589                  * assoc's are gone.
3590                  */
3591                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3592                 SCTP_DECR_READQ_COUNT();
3593         }
3594         /* Now the sctp_pcb things */
3595         /*
3596          * free each asoc if it is not already closed/free. we can't use the
3597          * macro here since le_next will get freed as part of the
3598          * sctp_free_assoc() call.
3599          */
3600         cnt = 0;
3601         if (so) {
3602 #ifdef IPSEC
3603                 ipsec_delete_pcbpolicy(ip_pcb);
3604 #endif                          /* IPSEC */
3605
3606                 /* Unlocks not needed since the socket is gone now */
3607         }
3608         if (ip_pcb->inp_options) {
3609                 (void)sctp_m_free(ip_pcb->inp_options);
3610                 ip_pcb->inp_options = 0;
3611         }
3612         if (ip_pcb->inp_moptions) {
3613                 inp_freemoptions(ip_pcb->inp_moptions);
3614                 ip_pcb->inp_moptions = 0;
3615         }
3616 #ifdef INET6
3617         if (ip_pcb->inp_vflag & INP_IPV6) {
3618                 struct in6pcb *in6p;
3619
3620                 in6p = (struct in6pcb *)inp;
3621                 ip6_freepcbopts(in6p->in6p_outputopts);
3622         }
3623 #endif                          /* INET6 */
3624         ip_pcb->inp_vflag = 0;
3625         /* free up authentication fields */
3626         if (inp->sctp_ep.local_auth_chunks != NULL)
3627                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3628         if (inp->sctp_ep.local_hmacs != NULL)
3629                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3630
3631         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3632                 LIST_REMOVE(shared_key, next);
3633                 sctp_free_sharedkey(shared_key);
3634                 /* sa_ignore FREED_MEMORY */
3635         }
3636
3637         /*
3638          * if we have an address list the following will free the list of
3639          * ifaddr's that are set into this ep. Again macro limitations here,
3640          * since the LIST_FOREACH could be a bad idea.
3641          */
3642         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3643                 sctp_remove_laddr(laddr);
3644         }
3645
3646 #ifdef SCTP_TRACK_FREED_ASOCS
3647         /* TEMP CODE */
3648         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3649                 LIST_REMOVE(asoc, sctp_tcblist);
3650                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3651                 SCTP_DECR_ASOC_COUNT();
3652         }
3653         /* *** END TEMP CODE *** */
3654 #endif
3655         /* Now lets see about freeing the EP hash table. */
3656         if (inp->sctp_tcbhash != NULL) {
3657                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3658                 inp->sctp_tcbhash = NULL;
3659         }
3660         /* Now we must put the ep memory back into the zone pool */
3661         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3662         SCTP_INP_LOCK_DESTROY(inp);
3663         SCTP_INP_READ_DESTROY(inp);
3664         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3665         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3666         SCTP_DECR_EP_COUNT();
3667 }
3668
3669
3670 struct sctp_nets *
3671 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3672 {
3673         struct sctp_nets *net;
3674
3675         /* locate the address */
3676         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3677                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3678                         return (net);
3679         }
3680         return (NULL);
3681 }
3682
3683
3684 int
3685 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3686 {
3687         struct sctp_ifa *sctp_ifa;
3688
3689         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3690         if (sctp_ifa) {
3691                 return (1);
3692         } else {
3693                 return (0);
3694         }
3695 }
3696
3697 /*
3698  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3699  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3700  * stats of stuff.
3701  */
3702 int
3703 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3704     int set_scope, int from)
3705 {
3706         /*
3707          * The following is redundant to the same lines in the
3708          * sctp_aloc_assoc() but is needed since others call the add address
3709          * function
3710          */
3711         struct sctp_nets *net, *netfirst;
3712         int addr_inscope;
3713
3714         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3715             from);
3716         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3717
3718         netfirst = sctp_findnet(stcb, newaddr);
3719         if (netfirst) {
3720                 /*
3721                  * Lie and return ok, we don't want to make the association
3722                  * go away for this behavior. It will happen in the TCP
3723                  * model in a connected socket. It does not reach the hash
3724                  * table until after the association is built so it can't be
3725                  * found. Mark as reachable, since the initial creation will
3726                  * have been cleared and the NOT_IN_ASSOC flag will have
3727                  * been added... and we don't want to end up removing it
3728                  * back out.
3729                  */
3730                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3731                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3732                             SCTP_ADDR_UNCONFIRMED);
3733                 } else {
3734                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3735                 }
3736
3737                 return (0);
3738         }
3739         addr_inscope = 1;
3740         if (newaddr->sa_family == AF_INET) {
3741                 struct sockaddr_in *sin;
3742
3743                 sin = (struct sockaddr_in *)newaddr;
3744                 if (sin->sin_addr.s_addr == 0) {
3745                         /* Invalid address */
3746                         return (-1);
3747                 }
3748                 /* zero out the bzero area */
3749                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3750
3751                 /* assure len is set */
3752                 sin->sin_len = sizeof(struct sockaddr_in);
3753                 if (set_scope) {
3754 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3755                         stcb->ipv4_local_scope = 1;
3756 #else
3757                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3758                                 stcb->asoc.ipv4_local_scope = 1;
3759                         }
3760 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3761                 } else {
3762                         /* Validate the address is in scope */
3763                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3764                             (stcb->asoc.ipv4_local_scope == 0)) {
3765                                 addr_inscope = 0;
3766                         }
3767                 }
3768 #ifdef INET6
3769         } else if (newaddr->sa_family == AF_INET6) {
3770                 struct sockaddr_in6 *sin6;
3771
3772                 sin6 = (struct sockaddr_in6 *)newaddr;
3773                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3774                         /* Invalid address */
3775                         return (-1);
3776                 }
3777                 /* assure len is set */
3778                 sin6->sin6_len = sizeof(struct sockaddr_in6);
3779                 if (set_scope) {
3780                         if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3781                                 stcb->asoc.loopback_scope = 1;
3782                                 stcb->asoc.local_scope = 0;
3783                                 stcb->asoc.ipv4_local_scope = 1;
3784                                 stcb->asoc.site_scope = 1;
3785                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3786                                 /*
3787                                  * If the new destination is a LINK_LOCAL we
3788                                  * must have common site scope. Don't set
3789                                  * the local scope since we may not share
3790                                  * all links, only loopback can do this.
3791                                  * Links on the local network would also be
3792                                  * on our private network for v4 too.
3793                                  */
3794                                 stcb->asoc.ipv4_local_scope = 1;
3795                                 stcb->asoc.site_scope = 1;
3796                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3797                                 /*
3798                                  * If the new destination is SITE_LOCAL then
3799                                  * we must have site scope in common.
3800                                  */
3801                                 stcb->asoc.site_scope = 1;
3802                         }
3803                 } else {
3804                         /* Validate the address is in scope */
3805                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3806                             (stcb->asoc.loopback_scope == 0)) {
3807                                 addr_inscope = 0;
3808                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3809                             (stcb->asoc.local_scope == 0)) {
3810                                 addr_inscope = 0;
3811                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3812                             (stcb->asoc.site_scope == 0)) {
3813                                 addr_inscope = 0;
3814                         }
3815                 }
3816 #endif
3817         } else {
3818                 /* not supported family type */
3819                 return (-1);
3820         }
3821         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3822         if (net == NULL) {
3823                 return (-1);
3824         }
3825         SCTP_INCR_RADDR_COUNT();
3826         bzero(net, sizeof(*net));
3827         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3828         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3829         if (newaddr->sa_family == AF_INET) {
3830                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3831         } else if (newaddr->sa_family == AF_INET6) {
3832                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3833         }
3834         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3835         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3836                 stcb->asoc.loopback_scope = 1;
3837                 stcb->asoc.ipv4_local_scope = 1;
3838                 stcb->asoc.local_scope = 0;
3839                 stcb->asoc.site_scope = 1;
3840                 addr_inscope = 1;
3841         }
3842         net->failure_threshold = stcb->asoc.def_net_failure;
3843         if (addr_inscope == 0) {
3844                 net->dest_state = (SCTP_ADDR_REACHABLE |
3845                     SCTP_ADDR_OUT_OF_SCOPE);
3846         } else {
3847                 if (from == SCTP_ADDR_IS_CONFIRMED)
3848                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3849                         net->dest_state = SCTP_ADDR_REACHABLE;
3850                 else
3851                         net->dest_state = SCTP_ADDR_REACHABLE |
3852                             SCTP_ADDR_UNCONFIRMED;
3853         }
3854         /*
3855          * We set this to 0, the timer code knows that this means its an
3856          * initial value
3857          */
3858         net->RTO = 0;
3859         net->RTO_measured = 0;
3860         stcb->asoc.numnets++;
3861         *(&net->ref_count) = 1;
3862         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3863         net->tos_flowlabel = 0;
3864         if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) {
3865                 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
3866         } else {
3867                 net->port = 0;
3868         }
3869 #ifdef INET
3870         if (newaddr->sa_family == AF_INET)
3871                 net->tos_flowlabel = stcb->asoc.default_tos;
3872 #endif
3873 #ifdef INET6
3874         if (newaddr->sa_family == AF_INET6)
3875                 net->tos_flowlabel = stcb->asoc.default_flowlabel;
3876 #endif
3877         /* Init the timer structure */
3878         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3879         SCTP_OS_TIMER_INIT(&net->fr_timer.timer);
3880         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3881
3882         /* Now generate a route for this guy */
3883 #ifdef INET6
3884         /* KAME hack: embed scopeid */
3885         if (newaddr->sa_family == AF_INET6) {
3886                 struct sockaddr_in6 *sin6;
3887
3888                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3889                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3890                 sin6->sin6_scope_id = 0;
3891         }
3892 #endif
3893         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3894
3895         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3896                 /* Get source address */
3897                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3898                     stcb,
3899                     (sctp_route_t *) & net->ro,
3900                     net,
3901                     0,
3902                     stcb->asoc.vrf_id);
3903                 /* Now get the interface MTU */
3904                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3905                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3906                 } else {
3907                         net->mtu = 0;
3908                 }
3909                 if (net->mtu == 0) {
3910                         /* Huh ?? */
3911                         net->mtu = SCTP_DEFAULT_MTU;
3912                 } else {
3913                         uint32_t rmtu;
3914
3915                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3916                         if (rmtu == 0) {
3917                                 /*
3918                                  * Start things off to match mtu of
3919                                  * interface please.
3920                                  */
3921                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3922                                     net->ro.ro_rt, net->mtu);
3923                         } else {
3924                                 /*
3925                                  * we take the route mtu over the interface,
3926                                  * since the route may be leading out the
3927                                  * loopback, or a different interface.
3928                                  */
3929                                 net->mtu = rmtu;
3930                         }
3931                 }
3932                 if (from == SCTP_ALLOC_ASOC) {
3933                         stcb->asoc.smallest_mtu = net->mtu;
3934                 }
3935         } else {
3936                 net->mtu = stcb->asoc.smallest_mtu;
3937         }
3938 #ifdef INET6
3939         if (newaddr->sa_family == AF_INET6) {
3940                 struct sockaddr_in6 *sin6;
3941
3942                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3943                 (void)sa6_recoverscope(sin6);
3944         }
3945 #endif
3946         if (net->port) {
3947                 net->mtu -= sizeof(struct udphdr);
3948         }
3949         if (stcb->asoc.smallest_mtu > net->mtu) {
3950                 stcb->asoc.smallest_mtu = net->mtu;
3951         }
3952         /* JRS - Use the congestion control given in the CC module */
3953         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
3954
3955         /*
3956          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3957          * of assoc (2005/06/27, iyengar@cis.udel.edu)
3958          */
3959         net->find_pseudo_cumack = 1;
3960         net->find_rtx_pseudo_cumack = 1;
3961         net->src_addr_selected = 0;
3962         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3963         if (net->ro.ro_rt == NULL) {
3964                 /* Since we have no route put it at the back */
3965                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3966         } else if (netfirst == NULL) {
3967                 /* We are the first one in the pool. */
3968                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3969         } else if (netfirst->ro.ro_rt == NULL) {
3970                 /*
3971                  * First one has NO route. Place this one ahead of the first
3972                  * one.
3973                  */
3974                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3975         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
3976                 /*
3977                  * This one has a different interface than the one at the
3978                  * top of the list. Place it ahead.
3979                  */
3980                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3981         } else {
3982                 /*
3983                  * Ok we have the same interface as the first one. Move
3984                  * forward until we find either a) one with a NULL route...
3985                  * insert ahead of that b) one with a different ifp.. insert
3986                  * after that. c) end of the list.. insert at the tail.
3987                  */
3988                 struct sctp_nets *netlook;
3989
3990                 do {
3991                         netlook = TAILQ_NEXT(netfirst, sctp_next);
3992                         if (netlook == NULL) {
3993                                 /* End of the list */
3994                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3995                                 break;
3996                         } else if (netlook->ro.ro_rt == NULL) {
3997                                 /* next one has NO route */
3998                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
3999                                 break;
4000                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4001                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4002                                     net, sctp_next);
4003                                 break;
4004                         }
4005                         /* Shift forward */
4006                         netfirst = netlook;
4007                 } while (netlook != NULL);
4008         }
4009
4010         /* got to have a primary set */
4011         if (stcb->asoc.primary_destination == 0) {
4012                 stcb->asoc.primary_destination = net;
4013         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4014                     (net->ro.ro_rt) &&
4015             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4016                 /* No route to current primary adopt new primary */
4017                 stcb->asoc.primary_destination = net;
4018         }
4019         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
4020             net);
4021         /* Validate primary is first */
4022         net = TAILQ_FIRST(&stcb->asoc.nets);
4023         if ((net != stcb->asoc.primary_destination) &&
4024             (stcb->asoc.primary_destination)) {
4025                 /*
4026                  * first one on the list is NOT the primary sctp_cmpaddr()
4027                  * is much more efficient if the primary is the first on the
4028                  * list, make it so.
4029                  */
4030                 TAILQ_REMOVE(&stcb->asoc.nets,
4031                     stcb->asoc.primary_destination, sctp_next);
4032                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4033                     stcb->asoc.primary_destination, sctp_next);
4034         }
4035         return (0);
4036 }
4037
4038
4039 static uint32_t
4040 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4041 {
4042         uint32_t id;
4043         struct sctpasochead *head;
4044         struct sctp_tcb *lstcb;
4045
4046         SCTP_INP_WLOCK(inp);
4047 try_again:
4048         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4049                 /* TSNH */
4050                 SCTP_INP_WUNLOCK(inp);
4051                 return (0);
4052         }
4053         /*
4054          * We don't allow assoc id to be 0, this is needed otherwise if the
4055          * id were to wrap we would have issues with some socket options.
4056          */
4057         if (inp->sctp_associd_counter == 0) {
4058                 inp->sctp_associd_counter++;
4059         }
4060         id = inp->sctp_associd_counter;
4061         inp->sctp_associd_counter++;
4062         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4063         if (lstcb) {
4064                 goto try_again;
4065         }
4066         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4067         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4068         stcb->asoc.in_asocid_hash = 1;
4069         SCTP_INP_WUNLOCK(inp);
4070         return id;
4071 }
4072
4073 /*
4074  * allocate an association and add it to the endpoint. The caller must be
4075  * careful to add all additional addresses once they are know right away or
4076  * else the assoc will be may experience a blackout scenario.
4077  */
4078 struct sctp_tcb *
4079 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4080     int *error, uint32_t override_tag, uint32_t vrf_id,
4081     struct thread *p
4082 )
4083 {
4084         /* note the p argument is only valid in unbound sockets */
4085
4086         struct sctp_tcb *stcb;
4087         struct sctp_association *asoc;
4088         struct sctpasochead *head;
4089         uint16_t rport;
4090         int err;
4091
4092         /*
4093          * Assumption made here: Caller has done a
4094          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4095          * address does not exist already.
4096          */
4097         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4098                 /* Hit max assoc, sorry no more */
4099                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4100                 *error = ENOBUFS;
4101                 return (NULL);
4102         }
4103         if (firstaddr == NULL) {
4104                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4105                 *error = EINVAL;
4106                 return (NULL);
4107         }
4108         SCTP_INP_RLOCK(inp);
4109         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4110             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4111             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4112                 /*
4113                  * If its in the TCP pool, its NOT allowed to create an
4114                  * association. The parent listener needs to call
4115                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4116                  * off, or connected one does this.. its an error.
4117                  */
4118                 SCTP_INP_RUNLOCK(inp);
4119                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4120                 *error = EINVAL;
4121                 return (NULL);
4122         }
4123         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4124 #ifdef SCTP_DEBUG
4125         if (firstaddr) {
4126                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4127                 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4128                     ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4129         } else {
4130                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4131         }
4132 #endif                          /* SCTP_DEBUG */
4133         if (firstaddr->sa_family == AF_INET) {
4134                 struct sockaddr_in *sin;
4135
4136                 sin = (struct sockaddr_in *)firstaddr;
4137                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
4138                         /* Invalid address */
4139                         SCTP_INP_RUNLOCK(inp);
4140                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4141                         *error = EINVAL;
4142                         return (NULL);
4143                 }
4144                 rport = sin->sin_port;
4145         } else if (firstaddr->sa_family == AF_INET6) {
4146                 struct sockaddr_in6 *sin6;
4147
4148                 sin6 = (struct sockaddr_in6 *)firstaddr;
4149                 if ((sin6->sin6_port == 0) ||
4150                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
4151                         /* Invalid address */
4152                         SCTP_INP_RUNLOCK(inp);
4153                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4154                         *error = EINVAL;
4155                         return (NULL);
4156                 }
4157                 rport = sin6->sin6_port;
4158         } else {
4159                 /* not supported family type */
4160                 SCTP_INP_RUNLOCK(inp);
4161                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4162                 *error = EINVAL;
4163                 return (NULL);
4164         }
4165         SCTP_INP_RUNLOCK(inp);
4166         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4167                 /*
4168                  * If you have not performed a bind, then we need to do the
4169                  * ephemeral bind for you.
4170                  */
4171                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4172                     (struct sockaddr *)NULL,
4173                     (struct sctp_ifa *)NULL,
4174                     p
4175                     ))) {
4176                         /* bind error, probably perm */
4177                         *error = err;
4178                         return (NULL);
4179                 }
4180         }
4181         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4182         if (stcb == NULL) {
4183                 /* out of memory? */
4184                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4185                 *error = ENOMEM;
4186                 return (NULL);
4187         }
4188         SCTP_INCR_ASOC_COUNT();
4189
4190         bzero(stcb, sizeof(*stcb));
4191         asoc = &stcb->asoc;
4192
4193         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4194         SCTP_TCB_LOCK_INIT(stcb);
4195         SCTP_TCB_SEND_LOCK_INIT(stcb);
4196         stcb->rport = rport;
4197         /* setup back pointer's */
4198         stcb->sctp_ep = inp;
4199         stcb->sctp_socket = inp->sctp_socket;
4200         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4201                 /* failed */
4202                 SCTP_TCB_LOCK_DESTROY(stcb);
4203                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4204                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4205                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4206                 SCTP_DECR_ASOC_COUNT();
4207                 *error = err;
4208                 return (NULL);
4209         }
4210         /* and the port */
4211         SCTP_INP_INFO_WLOCK();
4212         SCTP_INP_WLOCK(inp);
4213         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4214                 /* inpcb freed while alloc going on */
4215                 SCTP_TCB_LOCK_DESTROY(stcb);
4216                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4217                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4218                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4219                 SCTP_INP_WUNLOCK(inp);
4220                 SCTP_INP_INFO_WUNLOCK();
4221                 SCTP_DECR_ASOC_COUNT();
4222                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4223                 *error = EINVAL;
4224                 return (NULL);
4225         }
4226         SCTP_TCB_LOCK(stcb);
4227
4228         /* now that my_vtag is set, add it to the hash */
4229         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4230         /* put it in the bucket in the vtag hash of assoc's for the system */
4231         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4232         SCTP_INP_INFO_WUNLOCK();
4233
4234         if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4235                 /* failure.. memory error? */
4236                 if (asoc->strmout) {
4237                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4238                         asoc->strmout = NULL;
4239                 }
4240                 if (asoc->mapping_array) {
4241                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4242                         asoc->mapping_array = NULL;
4243                 }
4244                 if (asoc->nr_mapping_array) {
4245                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4246                         asoc->nr_mapping_array = NULL;
4247                 }
4248                 SCTP_DECR_ASOC_COUNT();
4249                 SCTP_TCB_LOCK_DESTROY(stcb);
4250                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4251                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4252                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4253                 SCTP_INP_WUNLOCK(inp);
4254                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4255                 *error = ENOBUFS;
4256                 return (NULL);
4257         }
4258         /* Init all the timers */
4259         SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer);
4260         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4261         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4262         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4263         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4264         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4265         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4266         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4267
4268         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4269         /* now file the port under the hash as well */
4270         if (inp->sctp_tcbhash != NULL) {
4271                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4272                     inp->sctp_hashmark)];
4273                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4274         }
4275         SCTP_INP_WUNLOCK(inp);
4276         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
4277         return (stcb);
4278 }
4279
4280
4281 void
4282 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4283 {
4284         struct sctp_association *asoc;
4285
4286         asoc = &stcb->asoc;
4287         asoc->numnets--;
4288         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4289         if (net == asoc->primary_destination) {
4290                 /* Reset primary */
4291                 struct sctp_nets *lnet;
4292
4293                 lnet = TAILQ_FIRST(&asoc->nets);
4294                 /*
4295                  * Mobility adaptation Ideally, if deleted destination is
4296                  * the primary, it becomes a fast retransmission trigger by
4297                  * the subsequent SET PRIMARY. (by micchie)
4298                  */
4299                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4300                     SCTP_MOBILITY_BASE) ||
4301                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4302                     SCTP_MOBILITY_FASTHANDOFF)) {
4303                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4304                         if (asoc->deleted_primary != NULL) {
4305                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4306                                 goto out;
4307                         }
4308                         asoc->deleted_primary = net;
4309                         atomic_add_int(&net->ref_count, 1);
4310                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4311                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4312                         sctp_mobility_feature_on(stcb->sctp_ep,
4313                             SCTP_MOBILITY_PRIM_DELETED);
4314                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4315                             stcb->sctp_ep, stcb, NULL);
4316                 }
4317 out:
4318                 /* Try to find a confirmed primary */
4319                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4320         }
4321         if (net == asoc->last_data_chunk_from) {
4322                 /* Reset primary */
4323                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4324         }
4325         if (net == asoc->last_control_chunk_from) {
4326                 /* Clear net */
4327                 asoc->last_control_chunk_from = NULL;
4328         }
4329         sctp_free_remote_addr(net);
4330 }
4331
4332 /*
4333  * remove a remote endpoint address from an association, it will fail if the
4334  * address does not exist.
4335  */
4336 int
4337 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4338 {
4339         /*
4340          * Here we need to remove a remote address. This is quite simple, we
4341          * first find it in the list of address for the association
4342          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4343          * on that item. Note we do not allow it to be removed if there are
4344          * no other addresses.
4345          */
4346         struct sctp_association *asoc;
4347         struct sctp_nets *net, *nnet;
4348
4349         asoc = &stcb->asoc;
4350
4351         /* locate the address */
4352         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4353                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4354                         continue;
4355                 }
4356                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4357                     remaddr)) {
4358                         /* we found the guy */
4359                         if (asoc->numnets < 2) {
4360                                 /* Must have at LEAST two remote addresses */
4361                                 return (-1);
4362                         } else {
4363                                 sctp_remove_net(stcb, net);
4364                                 return (0);
4365                         }
4366                 }
4367         }
4368         /* not found. */
4369         return (-2);
4370 }
4371
4372 void
4373 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4374 {
4375         struct sctpvtaghead *chain;
4376         struct sctp_tagblock *twait_block;
4377         int found = 0;
4378         int i;
4379
4380         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4381         if (!LIST_EMPTY(chain)) {
4382                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4383                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4384                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4385                                     (twait_block->vtag_block[i].lport == lport) &&
4386                                     (twait_block->vtag_block[i].rport == rport)) {
4387                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4388                                         twait_block->vtag_block[i].v_tag = 0;
4389                                         twait_block->vtag_block[i].lport = 0;
4390                                         twait_block->vtag_block[i].rport = 0;
4391                                         found = 1;
4392                                         break;
4393                                 }
4394                         }
4395                         if (found)
4396                                 break;
4397                 }
4398         }
4399 }
4400
4401 int
4402 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4403 {
4404         struct sctpvtaghead *chain;
4405         struct sctp_tagblock *twait_block;
4406         int found = 0;
4407         int i;
4408
4409         SCTP_INP_INFO_WLOCK();
4410         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4411         if (!LIST_EMPTY(chain)) {
4412                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4413                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4414                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4415                                     (twait_block->vtag_block[i].lport == lport) &&
4416                                     (twait_block->vtag_block[i].rport == rport)) {
4417                                         found = 1;
4418                                         break;
4419                                 }
4420                         }
4421                         if (found)
4422                                 break;
4423                 }
4424         }
4425         SCTP_INP_INFO_WUNLOCK();
4426         return (found);
4427 }
4428
4429
4430 void
4431 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4432 {
4433         struct sctpvtaghead *chain;
4434         struct sctp_tagblock *twait_block;
4435         struct timeval now;
4436         int set, i;
4437
4438         if (time == 0) {
4439                 /* Its disabled */
4440                 return;
4441         }
4442         (void)SCTP_GETTIME_TIMEVAL(&now);
4443         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4444         set = 0;
4445         if (!LIST_EMPTY(chain)) {
4446                 /* Block(s) present, lets find space, and expire on the fly */
4447                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4448                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4449                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
4450                                     !set) {
4451                                         twait_block->vtag_block[i].tv_sec_at_expire =
4452                                             now.tv_sec + time;
4453                                         twait_block->vtag_block[i].v_tag = tag;
4454                                         twait_block->vtag_block[i].lport = lport;
4455                                         twait_block->vtag_block[i].rport = rport;
4456                                         set = 1;
4457                                 } else if ((twait_block->vtag_block[i].v_tag) &&
4458                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4459                                         /* Audit expires this guy */
4460                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4461                                         twait_block->vtag_block[i].v_tag = 0;
4462                                         twait_block->vtag_block[i].lport = 0;
4463                                         twait_block->vtag_block[i].rport = 0;
4464                                         if (set == 0) {
4465                                                 /* Reuse it for my new tag */
4466                                                 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4467                                                 twait_block->vtag_block[i].v_tag = tag;
4468                                                 twait_block->vtag_block[i].lport = lport;
4469                                                 twait_block->vtag_block[i].rport = rport;
4470                                                 set = 1;
4471                                         }
4472                                 }
4473                         }
4474                         if (set) {
4475                                 /*
4476                                  * We only do up to the block where we can
4477                                  * place our tag for audits
4478                                  */
4479                                 break;
4480                         }
4481                 }
4482         }
4483         /* Need to add a new block to chain */
4484         if (!set) {
4485                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4486                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4487                 if (twait_block == NULL) {
4488 #ifdef INVARIANTS
4489                         panic("Can not alloc tagblock");
4490 #endif
4491                         return;
4492                 }
4493                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4494                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4495                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4496                 twait_block->vtag_block[0].v_tag = tag;
4497                 twait_block->vtag_block[0].lport = lport;
4498                 twait_block->vtag_block[0].rport = rport;
4499         }
4500 }
4501
4502
4503
4504 /*-
4505  * Free the association after un-hashing the remote port. This
4506  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4507  * expect that the input to this function IS a locked TCB.
4508  * It will return 0, if it did NOT destroy the association (instead
4509  * it unlocks it. It will return NON-zero if it either destroyed the
4510  * association OR the association is already destroyed.
4511  */
4512 int
4513 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4514 {
4515         int i;
4516         struct sctp_association *asoc;
4517         struct sctp_nets *net, *nnet;
4518         struct sctp_laddr *laddr, *naddr;
4519         struct sctp_tmit_chunk *chk, *nchk;
4520         struct sctp_asconf_addr *aparam, *naparam;
4521         struct sctp_asconf_ack *aack, *naack;
4522         struct sctp_stream_reset_list *strrst, *nstrrst;
4523         struct sctp_queued_to_read *sq, *nsq;
4524         struct sctp_stream_queue_pending *sp, *nsp;
4525         sctp_sharedkey_t *shared_key, *nshared_key;
4526         struct socket *so;
4527
4528         /* first, lets purge the entry from the hash table. */
4529
4530 #ifdef SCTP_LOG_CLOSING
4531         sctp_log_closing(inp, stcb, 6);
4532 #endif
4533         if (stcb->asoc.state == 0) {
4534 #ifdef SCTP_LOG_CLOSING
4535                 sctp_log_closing(inp, NULL, 7);
4536 #endif
4537                 /* there is no asoc, really TSNH :-0 */
4538                 return (1);
4539         }
4540         /* TEMP CODE */
4541         if (stcb->freed_from_where == 0) {
4542                 /* Only record the first place free happened from */
4543                 stcb->freed_from_where = from_location;
4544         }
4545         /* TEMP CODE */
4546
4547         asoc = &stcb->asoc;
4548         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4549             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4550                 /* nothing around */
4551                 so = NULL;
4552         else
4553                 so = inp->sctp_socket;
4554
4555         /*
4556          * We used timer based freeing if a reader or writer is in the way.
4557          * So we first check if we are actually being called from a timer,
4558          * if so we abort early if a reader or writer is still in the way.
4559          */
4560         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4561             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4562                 /*
4563                  * is it the timer driving us? if so are the reader/writers
4564                  * gone?
4565                  */
4566                 if (stcb->asoc.refcnt) {
4567                         /* nope, reader or writer in the way */
4568                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4569                         /* no asoc destroyed */
4570                         SCTP_TCB_UNLOCK(stcb);
4571 #ifdef SCTP_LOG_CLOSING
4572                         sctp_log_closing(inp, stcb, 8);
4573 #endif
4574                         return (0);
4575                 }
4576         }
4577         /* now clean up any other timers */
4578         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4579         asoc->hb_timer.self = NULL;
4580         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4581         asoc->dack_timer.self = NULL;
4582         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4583         /*-
4584          * For stream reset we don't blast this unless
4585          * it is a str-reset timer, it might be the
4586          * free-asoc timer which we DON'T want to
4587          * disturb.
4588          */
4589         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4590                 asoc->strreset_timer.self = NULL;
4591         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4592         asoc->asconf_timer.self = NULL;
4593         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4594         asoc->autoclose_timer.self = NULL;
4595         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4596         asoc->shut_guard_timer.self = NULL;
4597         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4598         asoc->delayed_event_timer.self = NULL;
4599         /* Mobility adaptation */
4600         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4601         asoc->delete_prim_timer.self = NULL;
4602         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4603                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4604                 net->fr_timer.self = NULL;
4605                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4606                 net->rxt_timer.self = NULL;
4607                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4608                 net->pmtu_timer.self = NULL;
4609         }
4610         /* Now the read queue needs to be cleaned up (only once) */
4611         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4612                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4613                 SCTP_INP_READ_LOCK(inp);
4614                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4615                         if (sq->stcb == stcb) {
4616                                 sq->do_not_ref_stcb = 1;
4617                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4618                                 /*
4619                                  * If there is no end, there never will be
4620                                  * now.
4621                                  */
4622                                 if (sq->end_added == 0) {
4623                                         /* Held for PD-API clear that. */
4624                                         sq->pdapi_aborted = 1;
4625                                         sq->held_length = 0;
4626                                         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4627                                                 /*
4628                                                  * Need to add a PD-API
4629                                                  * aborted indication.
4630                                                  * Setting the control_pdapi
4631                                                  * assures that it will be
4632                                                  * added right after this
4633                                                  * msg.
4634                                                  */
4635                                                 uint32_t strseq;
4636
4637                                                 stcb->asoc.control_pdapi = sq;
4638                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4639                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4640                                                     stcb,
4641                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4642                                                     (void *)&strseq,
4643                                                     SCTP_SO_LOCKED);
4644                                                 stcb->asoc.control_pdapi = NULL;
4645                                         }
4646                                 }
4647                                 /* Add an end to wake them */
4648                                 sq->end_added = 1;
4649                         }
4650                 }
4651                 SCTP_INP_READ_UNLOCK(inp);
4652                 if (stcb->block_entry) {
4653                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4654                         stcb->block_entry->error = ECONNRESET;
4655                         stcb->block_entry = NULL;
4656                 }
4657         }
4658         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4659                 /*
4660                  * Someone holds a reference OR the socket is unaccepted
4661                  * yet.
4662                  */
4663                 if ((stcb->asoc.refcnt) ||
4664                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4665                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4666                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4667                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4668                 }
4669                 SCTP_TCB_UNLOCK(stcb);
4670                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4671                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4672                         /* nothing around */
4673                         so = NULL;
4674                 if (so) {
4675                         /* Wake any reader/writers */
4676                         sctp_sorwakeup(inp, so);
4677                         sctp_sowwakeup(inp, so);
4678                 }
4679 #ifdef SCTP_LOG_CLOSING
4680                 sctp_log_closing(inp, stcb, 9);
4681 #endif
4682                 /* no asoc destroyed */
4683                 return (0);
4684         }
4685 #ifdef SCTP_LOG_CLOSING
4686         sctp_log_closing(inp, stcb, 10);
4687 #endif
4688         /*
4689          * When I reach here, no others want to kill the assoc yet.. and I
4690          * own the lock. Now its possible an abort comes in when I do the
4691          * lock exchange below to grab all the locks to do the final take
4692          * out. to prevent this we increment the count, which will start a
4693          * timer and blow out above thus assuring us that we hold exclusive
4694          * killing of the asoc. Note that after getting back the TCB lock we
4695          * will go ahead and increment the counter back up and stop any
4696          * timer a passing stranger may have started :-S
4697          */
4698         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4699                 atomic_add_int(&stcb->asoc.refcnt, 1);
4700
4701                 SCTP_TCB_UNLOCK(stcb);
4702                 SCTP_INP_INFO_WLOCK();
4703                 SCTP_INP_WLOCK(inp);
4704                 SCTP_TCB_LOCK(stcb);
4705         }
4706         /* Double check the GONE flag */
4707         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4708             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4709                 /* nothing around */
4710                 so = NULL;
4711
4712         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4713             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4714                 /*
4715                  * For TCP type we need special handling when we are
4716                  * connected. We also include the peel'ed off ones to.
4717                  */
4718                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4719                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4720                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4721                         if (so) {
4722                                 SOCK_LOCK(so);
4723                                 if (so->so_rcv.sb_cc == 0) {
4724                                         so->so_state &= ~(SS_ISCONNECTING |
4725                                             SS_ISDISCONNECTING |
4726                                             SS_ISCONFIRMING |
4727                                             SS_ISCONNECTED);
4728                                 }
4729                                 socantrcvmore_locked(so);
4730                                 sctp_sowwakeup(inp, so);
4731                                 sctp_sorwakeup(inp, so);
4732                                 SCTP_SOWAKEUP(so);
4733                         }
4734                 }
4735         }
4736         /*
4737          * Make it invalid too, that way if its about to run it will abort
4738          * and return.
4739          */
4740         /* re-increment the lock */
4741         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4742                 atomic_add_int(&stcb->asoc.refcnt, -1);
4743         }
4744         if (stcb->asoc.refcnt) {
4745                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4746                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4747                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4748                         SCTP_INP_INFO_WUNLOCK();
4749                         SCTP_INP_WUNLOCK(inp);
4750                 }
4751                 SCTP_TCB_UNLOCK(stcb);
4752                 return (0);
4753         }
4754         asoc->state = 0;
4755         if (inp->sctp_tcbhash) {
4756                 LIST_REMOVE(stcb, sctp_tcbhash);
4757         }
4758         if (stcb->asoc.in_asocid_hash) {
4759                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4760         }
4761         /* Now lets remove it from the list of ALL associations in the EP */
4762         LIST_REMOVE(stcb, sctp_tcblist);
4763         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4764                 SCTP_INP_INCR_REF(inp);
4765                 SCTP_INP_WUNLOCK(inp);
4766         }
4767         /* pull from vtag hash */
4768         LIST_REMOVE(stcb, sctp_asocs);
4769         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4770             inp->sctp_lport, stcb->rport);
4771
4772         /*
4773          * Now restop the timers to be sure this is paranoia at is finest!
4774          */
4775         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4776         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4777         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4778         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4779         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4780         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4781         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4782         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4783         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4784                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4785                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4786                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4787         }
4788
4789         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4790         /*
4791          * The chunk lists and such SHOULD be empty but we check them just
4792          * in case.
4793          */
4794         /* anything on the wheel needs to be removed */
4795         for (i = 0; i < asoc->streamoutcnt; i++) {
4796                 struct sctp_stream_out *outs;
4797
4798                 outs = &asoc->strmout[i];
4799                 /* now clean up any chunks here */
4800                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4801                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4802                         if (sp->data) {
4803                                 if (so) {
4804                                         /* Still an open socket - report */
4805                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4806                                             SCTP_NOTIFY_DATAGRAM_UNSENT,
4807                                             (void *)sp, SCTP_SO_LOCKED);
4808                                 }
4809                                 if (sp->data) {
4810                                         sctp_m_freem(sp->data);
4811                                         sp->data = NULL;
4812                                         sp->tail_mbuf = NULL;
4813                                 }
4814                         }
4815                         if (sp->net) {
4816                                 sctp_free_remote_addr(sp->net);
4817                                 sp->net = NULL;
4818                         }
4819                         sctp_free_spbufspace(stcb, asoc, sp);
4820                         if (sp->holds_key_ref)
4821                                 sctp_auth_key_release(stcb, sp->auth_keyid);
4822                         /* Free the zone stuff  */
4823                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp);
4824                         SCTP_DECR_STRMOQ_COUNT();
4825                         /* sa_ignore FREED_MEMORY */
4826                 }
4827         }
4828         /* sa_ignore FREED_MEMORY */
4829         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4830                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4831                 SCTP_FREE(strrst, SCTP_M_STRESET);
4832         }
4833         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4834                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4835                 if (sq->data) {
4836                         sctp_m_freem(sq->data);
4837                         sq->data = NULL;
4838                 }
4839                 sctp_free_remote_addr(sq->whoFrom);
4840                 sq->whoFrom = NULL;
4841                 sq->stcb = NULL;
4842                 /* Free the ctl entry */
4843                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4844                 SCTP_DECR_READQ_COUNT();
4845                 /* sa_ignore FREED_MEMORY */
4846         }
4847         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4848                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4849                 if (chk->data) {
4850                         sctp_m_freem(chk->data);
4851                         chk->data = NULL;
4852                 }
4853                 if (chk->holds_key_ref)
4854                         sctp_auth_key_release(stcb, chk->auth_keyid);
4855                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4856                 SCTP_DECR_CHK_COUNT();
4857                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4858                 asoc->free_chunk_cnt--;
4859                 /* sa_ignore FREED_MEMORY */
4860         }
4861         /* pending send queue SHOULD be empty */
4862         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4863                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4864                 if (chk->data) {
4865                         if (so) {
4866                                 /* Still a socket? */
4867                                 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb,
4868                                     SCTP_NOTIFY_DATAGRAM_UNSENT, chk, SCTP_SO_LOCKED);
4869                         }
4870                         if (chk->data) {
4871                                 sctp_m_freem(chk->data);
4872                                 chk->data = NULL;
4873                         }
4874                 }
4875                 if (chk->holds_key_ref)
4876                         sctp_auth_key_release(stcb, chk->auth_keyid);
4877                 if (chk->whoTo) {
4878                         sctp_free_remote_addr(chk->whoTo);
4879                         chk->whoTo = NULL;
4880                 }
4881                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4882                 SCTP_DECR_CHK_COUNT();
4883                 /* sa_ignore FREED_MEMORY */
4884         }
4885         /* sent queue SHOULD be empty */
4886         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
4887                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4888                 if (chk->data) {
4889                         if (so) {
4890                                 /* Still a socket? */
4891                                 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb,
4892                                     SCTP_NOTIFY_DATAGRAM_SENT, chk, SCTP_SO_LOCKED);
4893                         }
4894                         if (chk->data) {
4895                                 sctp_m_freem(chk->data);
4896                                 chk->data = NULL;
4897                         }
4898                 }
4899                 if (chk->holds_key_ref)
4900                         sctp_auth_key_release(stcb, chk->auth_keyid);
4901                 sctp_free_remote_addr(chk->whoTo);
4902                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4903                 SCTP_DECR_CHK_COUNT();
4904                 /* sa_ignore FREED_MEMORY */
4905         }
4906         /* control queue MAY not be empty */
4907         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
4908                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4909                 if (chk->data) {
4910                         sctp_m_freem(chk->data);
4911                         chk->data = NULL;
4912                 }
4913                 if (chk->holds_key_ref)
4914                         sctp_auth_key_release(stcb, chk->auth_keyid);
4915                 sctp_free_remote_addr(chk->whoTo);
4916                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4917                 SCTP_DECR_CHK_COUNT();
4918                 /* sa_ignore FREED_MEMORY */
4919         }
4920         /* ASCONF queue MAY not be empty */
4921         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
4922                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
4923                 if (chk->data) {
4924                         sctp_m_freem(chk->data);
4925                         chk->data = NULL;
4926                 }
4927                 if (chk->holds_key_ref)
4928                         sctp_auth_key_release(stcb, chk->auth_keyid);
4929                 sctp_free_remote_addr(chk->whoTo);
4930                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4931                 SCTP_DECR_CHK_COUNT();
4932                 /* sa_ignore FREED_MEMORY */
4933         }
4934         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
4935                 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
4936                 if (chk->data) {
4937                         sctp_m_freem(chk->data);
4938                         chk->data = NULL;
4939                 }
4940                 if (chk->holds_key_ref)
4941                         sctp_auth_key_release(stcb, chk->auth_keyid);
4942                 sctp_free_remote_addr(chk->whoTo);
4943                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4944                 SCTP_DECR_CHK_COUNT();
4945                 /* sa_ignore FREED_MEMORY */
4946         }
4947
4948         if (asoc->mapping_array) {
4949                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4950                 asoc->mapping_array = NULL;
4951         }
4952         if (asoc->nr_mapping_array) {
4953                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4954                 asoc->nr_mapping_array = NULL;
4955         }
4956         /* the stream outs */
4957         if (asoc->strmout) {
4958                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4959                 asoc->strmout = NULL;
4960         }
4961         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
4962         if (asoc->strmin) {
4963                 struct sctp_queued_to_read *ctl, *nctl;
4964
4965                 for (i = 0; i < asoc->streamincnt; i++) {
4966                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
4967                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
4968                                 sctp_free_remote_addr(ctl->whoFrom);
4969                                 if (ctl->data) {
4970                                         sctp_m_freem(ctl->data);
4971                                         ctl->data = NULL;
4972                                 }
4973                                 /*
4974                                  * We don't free the address here since all
4975                                  * the net's were freed above.
4976                                  */
4977                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
4978                                 SCTP_DECR_READQ_COUNT();
4979                         }
4980                 }
4981                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
4982                 asoc->strmin = NULL;
4983         }
4984         asoc->streamincnt = 0;
4985         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4986 #ifdef INVARIANTS
4987                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
4988                         panic("no net's left alloc'ed, or list points to itself");
4989                 }
4990 #endif
4991                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4992                 sctp_free_remote_addr(net);
4993         }
4994         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
4995                 /* sa_ignore FREED_MEMORY */
4996                 sctp_remove_laddr(laddr);
4997         }
4998
4999         /* pending asconf (address) parameters */
5000         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5001                 /* sa_ignore FREED_MEMORY */
5002                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5003                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5004         }
5005         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5006                 /* sa_ignore FREED_MEMORY */
5007                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5008                 if (aack->data != NULL) {
5009                         sctp_m_freem(aack->data);
5010                 }
5011                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5012         }
5013         /* clean up auth stuff */
5014         if (asoc->local_hmacs)
5015                 sctp_free_hmaclist(asoc->local_hmacs);
5016         if (asoc->peer_hmacs)
5017                 sctp_free_hmaclist(asoc->peer_hmacs);
5018
5019         if (asoc->local_auth_chunks)
5020                 sctp_free_chunklist(asoc->local_auth_chunks);
5021         if (asoc->peer_auth_chunks)
5022                 sctp_free_chunklist(asoc->peer_auth_chunks);
5023
5024         sctp_free_authinfo(&asoc->authinfo);
5025
5026         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5027                 LIST_REMOVE(shared_key, next);
5028                 sctp_free_sharedkey(shared_key);
5029                 /* sa_ignore FREED_MEMORY */
5030         }
5031
5032         /* Insert new items here :> */
5033
5034         /* Get rid of LOCK */
5035         SCTP_TCB_LOCK_DESTROY(stcb);
5036         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5037         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5038                 SCTP_INP_INFO_WUNLOCK();
5039                 SCTP_INP_RLOCK(inp);
5040         }
5041 #ifdef SCTP_TRACK_FREED_ASOCS
5042         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5043                 /* now clean up the tasoc itself */
5044                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5045                 SCTP_DECR_ASOC_COUNT();
5046         } else {
5047                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5048         }
5049 #else
5050         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5051         SCTP_DECR_ASOC_COUNT();
5052 #endif
5053         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5054                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5055                         /*
5056                          * If its NOT the inp_free calling us AND sctp_close
5057                          * as been called, we call back...
5058                          */
5059                         SCTP_INP_RUNLOCK(inp);
5060                         /*
5061                          * This will start the kill timer (if we are the
5062                          * last one) since we hold an increment yet. But
5063                          * this is the only safe way to do this since
5064                          * otherwise if the socket closes at the same time
5065                          * we are here we might collide in the cleanup.
5066                          */
5067                         sctp_inpcb_free(inp,
5068                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5069                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5070                         SCTP_INP_DECR_REF(inp);
5071                         goto out_of;
5072                 } else {
5073                         /* The socket is still open. */
5074                         SCTP_INP_DECR_REF(inp);
5075                 }
5076         }
5077         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5078                 SCTP_INP_RUNLOCK(inp);
5079         }
5080 out_of:
5081         /* destroyed the asoc */
5082 #ifdef SCTP_LOG_CLOSING
5083         sctp_log_closing(inp, NULL, 11);
5084 #endif
5085         return (1);
5086 }
5087
5088
5089
5090 /*
5091  * determine if a destination is "reachable" based upon the addresses bound
5092  * to the current endpoint (e.g. only v4 or v6 currently bound)
5093  */
5094 /*
5095  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5096  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5097  * types bound as its endpoint
5098  */
5099 int
5100 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5101 {
5102         struct sctp_inpcb *inp;
5103         int answer;
5104
5105         /*
5106          * No locks here, the TCB, in all cases is already locked and an
5107          * assoc is up. There is either a INP lock by the caller applied (in
5108          * asconf case when deleting an address) or NOT in the HB case,
5109          * however if HB then the INP increment is up and the INP will not
5110          * be removed (on top of the fact that we have a TCB lock). So we
5111          * only want to read the sctp_flags, which is either bound-all or
5112          * not.. no protection needed since once an assoc is up you can't be
5113          * changing your binding.
5114          */
5115         inp = stcb->sctp_ep;
5116         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5117                 /* if bound all, destination is not restricted */
5118                 /*
5119                  * RRS: Question during lock work: Is this correct? If you
5120                  * are bound-all you still might need to obey the V4--V6
5121                  * flags??? IMO this bound-all stuff needs to be removed!
5122                  */
5123                 return (1);
5124         }
5125         /* NOTE: all "scope" checks are done when local addresses are added */
5126         if (destaddr->sa_family == AF_INET6) {
5127                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5128         } else if (destaddr->sa_family == AF_INET) {
5129                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5130         } else {
5131                 /* invalid family, so it's unreachable */
5132                 answer = 0;
5133         }
5134         return (answer);
5135 }
5136
5137 /*
5138  * update the inp_vflags on an endpoint
5139  */
5140 static void
5141 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5142 {
5143         struct sctp_laddr *laddr;
5144
5145         /* first clear the flag */
5146         inp->ip_inp.inp.inp_vflag = 0;
5147         /* set the flag based on addresses on the ep list */
5148         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5149                 if (laddr->ifa == NULL) {
5150                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5151                             __FUNCTION__);
5152                         continue;
5153                 }
5154                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5155                         continue;
5156                 }
5157                 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
5158                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5159                 } else if (laddr->ifa->address.sa.sa_family == AF_INET) {
5160                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5161                 }
5162         }
5163 }
5164
5165 /*
5166  * Add the address to the endpoint local address list There is nothing to be
5167  * done if we are bound to all addresses
5168  */
5169 void
5170 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5171 {
5172         struct sctp_laddr *laddr;
5173         int fnd, error = 0;
5174
5175         fnd = 0;
5176
5177         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5178                 /* You are already bound to all. You have it already */
5179                 return;
5180         }
5181         if (ifa->address.sa.sa_family == AF_INET6) {
5182                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5183                         /* Can't bind a non-useable addr. */
5184                         return;
5185                 }
5186         }
5187         /* first, is it already present? */
5188         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5189                 if (laddr->ifa == ifa) {
5190                         fnd = 1;
5191                         break;
5192                 }
5193         }
5194
5195         if (fnd == 0) {
5196                 /* Not in the ep list */
5197                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5198                 if (error != 0)
5199                         return;
5200                 inp->laddr_count++;
5201                 /* update inp_vflag flags */
5202                 if (ifa->address.sa.sa_family == AF_INET6) {
5203                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5204                 } else if (ifa->address.sa.sa_family == AF_INET) {
5205                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5206                 }
5207         }
5208         return;
5209 }
5210
5211
5212 /*
5213  * select a new (hopefully reachable) destination net (should only be used
5214  * when we deleted an ep addr that is the only usable source address to reach
5215  * the destination net)
5216  */
5217 static void
5218 sctp_select_primary_destination(struct sctp_tcb *stcb)
5219 {
5220         struct sctp_nets *net;
5221
5222         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5223                 /* for now, we'll just pick the first reachable one we find */
5224                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5225                         continue;
5226                 if (sctp_destination_is_reachable(stcb,
5227                     (struct sockaddr *)&net->ro._l_addr)) {
5228                         /* found a reachable destination */
5229                         stcb->asoc.primary_destination = net;
5230                 }
5231         }
5232         /* I can't there from here! ...we're gonna die shortly... */
5233 }
5234
5235
5236 /*
5237  * Delete the address from the endpoint local address list There is nothing
5238  * to be done if we are bound to all addresses
5239  */
5240 void
5241 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5242 {
5243         struct sctp_laddr *laddr;
5244         int fnd;
5245
5246         fnd = 0;
5247         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5248                 /* You are already bound to all. You have it already */
5249                 return;
5250         }
5251         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5252                 if (laddr->ifa == ifa) {
5253                         fnd = 1;
5254                         break;
5255                 }
5256         }
5257         if (fnd && (inp->laddr_count < 2)) {
5258                 /* can't delete unless there are at LEAST 2 addresses */
5259                 return;
5260         }
5261         if (fnd) {
5262                 /*
5263                  * clean up any use of this address go through our
5264                  * associations and clear any last_used_address that match
5265                  * this one for each assoc, see if a new primary_destination
5266                  * is needed
5267                  */
5268                 struct sctp_tcb *stcb;
5269
5270                 /* clean up "next_addr_touse" */
5271                 if (inp->next_addr_touse == laddr)
5272                         /* delete this address */
5273                         inp->next_addr_touse = NULL;
5274
5275                 /* clean up "last_used_address" */
5276                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5277                         struct sctp_nets *net;
5278
5279                         SCTP_TCB_LOCK(stcb);
5280                         if (stcb->asoc.last_used_address == laddr)
5281                                 /* delete this address */
5282                                 stcb->asoc.last_used_address = NULL;
5283                         /*
5284                          * Now spin through all the nets and purge any ref
5285                          * to laddr
5286                          */
5287                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5288                                 if (net->ro._s_addr &&
5289                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5290                                         /* Yep, purge src address selected */
5291                                         sctp_rtentry_t *rt;
5292
5293                                         /* delete this address if cached */
5294                                         rt = net->ro.ro_rt;
5295                                         if (rt != NULL) {
5296                                                 RTFREE(rt);
5297                                                 net->ro.ro_rt = NULL;
5298                                         }
5299                                         sctp_free_ifa(net->ro._s_addr);
5300                                         net->ro._s_addr = NULL;
5301                                         net->src_addr_selected = 0;
5302                                 }
5303                         }
5304                         SCTP_TCB_UNLOCK(stcb);
5305                 }               /* for each tcb */
5306                 /* remove it from the ep list */
5307                 sctp_remove_laddr(laddr);
5308                 inp->laddr_count--;
5309                 /* update inp_vflag flags */
5310                 sctp_update_ep_vflag(inp);
5311         }
5312         return;
5313 }
5314
5315 /*
5316  * Add the address to the TCB local address restricted list.
5317  * This is a "pending" address list (eg. addresses waiting for an
5318  * ASCONF-ACK response) and cannot be used as a valid source address.
5319  */
5320 void
5321 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5322 {
5323         struct sctp_inpcb *inp;
5324         struct sctp_laddr *laddr;
5325         struct sctpladdr *list;
5326
5327         /*
5328          * Assumes TCB is locked.. and possibly the INP. May need to
5329          * confirm/fix that if we need it and is not the case.
5330          */
5331         list = &stcb->asoc.sctp_restricted_addrs;
5332
5333         inp = stcb->sctp_ep;
5334         if (ifa->address.sa.sa_family == AF_INET6) {
5335                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5336                         /* Can't bind a non-existent addr. */
5337                         return;
5338                 }
5339         }
5340         /* does the address already exist? */
5341         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5342                 if (laddr->ifa == ifa) {
5343                         return;
5344                 }
5345         }
5346
5347         /* add to the list */
5348         (void)sctp_insert_laddr(list, ifa, 0);
5349         return;
5350 }
5351
5352 /*
5353  * insert an laddr entry with the given ifa for the desired list
5354  */
5355 int
5356 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5357 {
5358         struct sctp_laddr *laddr;
5359
5360         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5361         if (laddr == NULL) {
5362                 /* out of memory? */
5363                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5364                 return (EINVAL);
5365         }
5366         SCTP_INCR_LADDR_COUNT();
5367         bzero(laddr, sizeof(*laddr));
5368         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5369         laddr->ifa = ifa;
5370         laddr->action = act;
5371         atomic_add_int(&ifa->refcount, 1);
5372         /* insert it */
5373         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5374
5375         return (0);
5376 }
5377
5378 /*
5379  * Remove an laddr entry from the local address list (on an assoc)
5380  */
5381 void
5382 sctp_remove_laddr(struct sctp_laddr *laddr)
5383 {
5384
5385         /* remove from the list */
5386         LIST_REMOVE(laddr, sctp_nxt_addr);
5387         sctp_free_ifa(laddr->ifa);
5388         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5389         SCTP_DECR_LADDR_COUNT();
5390 }
5391
5392 /*
5393  * Remove a local address from the TCB local address restricted list
5394  */
5395 void
5396 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5397 {
5398         struct sctp_inpcb *inp;
5399         struct sctp_laddr *laddr;
5400
5401         /*
5402          * This is called by asconf work. It is assumed that a) The TCB is
5403          * locked and b) The INP is locked. This is true in as much as I can
5404          * trace through the entry asconf code where I did these locks.
5405          * Again, the ASCONF code is a bit different in that it does lock
5406          * the INP during its work often times. This must be since we don't
5407          * want other proc's looking up things while what they are looking
5408          * up is changing :-D
5409          */
5410
5411         inp = stcb->sctp_ep;
5412         /* if subset bound and don't allow ASCONF's, can't delete last */
5413         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5414             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5415                 if (stcb->sctp_ep->laddr_count < 2) {
5416                         /* can't delete last address */
5417                         return;
5418                 }
5419         }
5420         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5421                 /* remove the address if it exists */
5422                 if (laddr->ifa == NULL)
5423                         continue;
5424                 if (laddr->ifa == ifa) {
5425                         sctp_remove_laddr(laddr);
5426                         return;
5427                 }
5428         }
5429
5430         /* address not found! */
5431         return;
5432 }
5433
5434 /*
5435  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5436  */
5437 /* sysctl */
5438 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5439 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5440
5441
5442
5443 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5444 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5445
5446 void
5447 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5448 {
5449         /* Queue a packet to a processor for the specified core */
5450         struct sctp_mcore_queue *qent;
5451         struct sctp_mcore_ctrl *wkq;
5452         int need_wake = 0;
5453
5454         if (sctp_mcore_workers == NULL) {
5455                 /* Something went way bad during setup */
5456                 sctp_input_with_port(m, off, 0);
5457                 return;
5458         }
5459         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5460             (sizeof(struct sctp_mcore_queue)),
5461             SCTP_M_MCORE);
5462         if (qent == NULL) {
5463                 /* This is trouble  */
5464                 sctp_input_with_port(m, off, 0);
5465                 return;
5466         }
5467         qent->vn = curvnet;
5468         qent->m = m;
5469         qent->off = off;
5470         qent->v6 = 0;
5471         wkq = &sctp_mcore_workers[cpu_to_use];
5472         SCTP_MCORE_QLOCK(wkq);
5473
5474         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5475         if (wkq->running == 0) {
5476                 need_wake = 1;
5477         }
5478         SCTP_MCORE_QUNLOCK(wkq);
5479         if (need_wake) {
5480                 wakeup(&wkq->running);
5481         }
5482 }
5483
5484 static void
5485 sctp_mcore_thread(void *arg)
5486 {
5487
5488         struct sctp_mcore_ctrl *wkq;
5489         struct sctp_mcore_queue *qent;
5490
5491         wkq = (struct sctp_mcore_ctrl *)arg;
5492         struct mbuf *m;
5493         int off, v6;
5494
5495         /* Wait for first tickle */
5496         SCTP_MCORE_LOCK(wkq);
5497         wkq->running = 0;
5498         msleep(&wkq->running,
5499             &wkq->core_mtx,
5500             0, "wait for pkt", 0);
5501         SCTP_MCORE_UNLOCK(wkq);
5502
5503         /* Bind to our cpu */
5504         thread_lock(curthread);
5505         sched_bind(curthread, wkq->cpuid);
5506         thread_unlock(curthread);
5507
5508         /* Now lets start working */
5509         SCTP_MCORE_LOCK(wkq);
5510         /* Now grab lock and go */
5511         while (1) {
5512                 SCTP_MCORE_QLOCK(wkq);
5513 skip_sleep:
5514                 wkq->running = 1;
5515                 qent = TAILQ_FIRST(&wkq->que);
5516                 if (qent) {
5517                         TAILQ_REMOVE(&wkq->que, qent, next);
5518                         SCTP_MCORE_QUNLOCK(wkq);
5519                         CURVNET_SET(qent->vn);
5520                         m = qent->m;
5521                         off = qent->off;
5522                         v6 = qent->v6;
5523                         SCTP_FREE(qent, SCTP_M_MCORE);
5524                         if (v6 == 0) {
5525                                 sctp_input_with_port(m, off, 0);
5526                         } else {
5527                                 printf("V6 not yet supported\n");
5528                                 sctp_m_freem(m);
5529                         }
5530                         CURVNET_RESTORE();
5531                         SCTP_MCORE_QLOCK(wkq);
5532                 }
5533                 wkq->running = 0;
5534                 if (!TAILQ_EMPTY(&wkq->que)) {
5535                         goto skip_sleep;
5536                 }
5537                 SCTP_MCORE_QUNLOCK(wkq);
5538                 msleep(&wkq->running,
5539                     &wkq->core_mtx,
5540                     0, "wait for pkt", 0);
5541         };
5542 }
5543
5544 static void
5545 sctp_startup_mcore_threads(void)
5546 {
5547         int i;
5548
5549         if (mp_ncpus == 1)
5550                 return;
5551
5552         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5553             (mp_ncpus * sizeof(struct sctp_mcore_ctrl)),
5554             SCTP_M_MCORE);
5555         if (sctp_mcore_workers == NULL) {
5556                 /* TSNH I hope */
5557                 return;
5558         }
5559         memset(sctp_mcore_workers, 0, (mp_ncpus *
5560             sizeof(struct sctp_mcore_ctrl)));
5561         /* Init the structures */
5562         for (i = 0; i < mp_ncpus; i++) {
5563                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5564                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5565                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5566                 sctp_mcore_workers[i].cpuid = i;
5567         }
5568         /* Now start them all */
5569         for (i = 0; i < mp_ncpus; i++) {
5570                 (void)kproc_create(sctp_mcore_thread,
5571                     (void *)&sctp_mcore_workers[i],
5572                     &sctp_mcore_workers[i].thread_proc,
5573                     RFPROC,
5574                     SCTP_KTHREAD_PAGES,
5575                     SCTP_MCORE_NAME);
5576
5577         }
5578 }
5579
5580 #endif
5581
5582
5583 void
5584 sctp_pcb_init()
5585 {
5586         /*
5587          * SCTP initialization for the PCB structures should be called by
5588          * the sctp_init() funciton.
5589          */
5590         int i;
5591         struct timeval tv;
5592
5593         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5594                 /* error I was called twice */
5595                 return;
5596         }
5597         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5598
5599 #if defined(SCTP_LOCAL_TRACE_BUF)
5600         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5601 #endif
5602         (void)SCTP_GETTIME_TIMEVAL(&tv);
5603 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5604         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5605         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5606 #else
5607         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5608         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5609 #endif
5610         /* init the empty list of (All) Endpoints */
5611         LIST_INIT(&SCTP_BASE_INFO(listhead));
5612
5613
5614         /* init the hash table of endpoints */
5615         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5616         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5617         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5618         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5619             &SCTP_BASE_INFO(hashasocmark));
5620         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5621             &SCTP_BASE_INFO(hashmark));
5622         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5623             &SCTP_BASE_INFO(hashtcpmark));
5624         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5625
5626
5627         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5628             &SCTP_BASE_INFO(hashvrfmark));
5629
5630         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5631             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5632         /* init the zones */
5633         /*
5634          * FIX ME: Should check for NULL returns, but if it does fail we are
5635          * doomed to panic anyways... add later maybe.
5636          */
5637         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5638             sizeof(struct sctp_inpcb), maxsockets);
5639
5640         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5641             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5642
5643         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5644             sizeof(struct sctp_laddr),
5645             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5646
5647         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5648             sizeof(struct sctp_nets),
5649             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5650
5651         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5652             sizeof(struct sctp_tmit_chunk),
5653             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5654
5655         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5656             sizeof(struct sctp_queued_to_read),
5657             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5658
5659         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5660             sizeof(struct sctp_stream_queue_pending),
5661             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5662
5663         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5664             sizeof(struct sctp_asconf),
5665             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5666
5667         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5668             sizeof(struct sctp_asconf_ack),
5669             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5670
5671
5672         /* Master Lock INIT for info structure */
5673         SCTP_INP_INFO_LOCK_INIT();
5674         SCTP_STATLOG_INIT_LOCK();
5675
5676         SCTP_IPI_COUNT_INIT();
5677         SCTP_IPI_ADDR_INIT();
5678 #ifdef SCTP_PACKET_LOGGING
5679         SCTP_IP_PKTLOG_INIT();
5680 #endif
5681         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5682
5683         SCTP_WQ_ADDR_INIT();
5684         /* not sure if we need all the counts */
5685         SCTP_BASE_INFO(ipi_count_ep) = 0;
5686         /* assoc/tcb zone info */
5687         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5688         /* local addrlist zone info */
5689         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5690         /* remote addrlist zone info */
5691         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5692         /* chunk info */
5693         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5694
5695         /* socket queue zone info */
5696         SCTP_BASE_INFO(ipi_count_readq) = 0;
5697
5698         /* stream out queue cont */
5699         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5700
5701         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5702         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5703
5704         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5705
5706         /* Init the TIMEWAIT list */
5707         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5708                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5709         }
5710
5711         sctp_startup_iterator();
5712
5713 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5714         sctp_startup_mcore_threads();
5715 #endif
5716
5717         /*
5718          * INIT the default VRF which for BSD is the only one, other O/S's
5719          * may have more. But initially they must start with one and then
5720          * add the VRF's as addresses are added.
5721          */
5722         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5723
5724 }
5725
5726 /*
5727  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5728  */
5729 void
5730 sctp_pcb_finish(void)
5731 {
5732         struct sctp_vrflist *vrf_bucket;
5733         struct sctp_vrf *vrf, *nvrf;
5734         struct sctp_ifn *ifn, *nifn;
5735         struct sctp_ifa *ifa, *nifa;
5736         struct sctpvtaghead *chain;
5737         struct sctp_tagblock *twait_block, *prev_twait_block;
5738         struct sctp_laddr *wi, *nwi;
5739         int i;
5740
5741         /*
5742          * Free BSD the it thread never exits but we do clean up. The only
5743          * way freebsd reaches here if we have VRF's but we still add the
5744          * ifdef to make it compile on old versions.
5745          */
5746         {
5747                 struct sctp_iterator *it, *nit;
5748
5749                 SCTP_IPI_ITERATOR_WQ_LOCK();
5750                 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5751                         if (it->vn != curvnet) {
5752                                 continue;
5753                         }
5754                         TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5755                         if (it->function_atend != NULL) {
5756                                 (*it->function_atend) (it->pointer, it->val);
5757                         }
5758                         SCTP_FREE(it, SCTP_M_ITER);
5759                 }
5760                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5761                 SCTP_ITERATOR_LOCK();
5762                 if ((sctp_it_ctl.cur_it) &&
5763                     (sctp_it_ctl.cur_it->vn == curvnet)) {
5764                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5765                 }
5766                 SCTP_ITERATOR_UNLOCK();
5767         }
5768
5769         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5770         SCTP_WQ_ADDR_LOCK();
5771         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5772                 LIST_REMOVE(wi, sctp_nxt_addr);
5773                 SCTP_DECR_LADDR_COUNT();
5774                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5775         }
5776         SCTP_WQ_ADDR_UNLOCK();
5777
5778         /*
5779          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5780          * destroyed first).
5781          */
5782         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5783         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5784                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5785                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5786                                 /* free the ifa */
5787                                 LIST_REMOVE(ifa, next_bucket);
5788                                 LIST_REMOVE(ifa, next_ifa);
5789                                 SCTP_FREE(ifa, SCTP_M_IFA);
5790                         }
5791                         /* free the ifn */
5792                         LIST_REMOVE(ifn, next_bucket);
5793                         LIST_REMOVE(ifn, next_ifn);
5794                         SCTP_FREE(ifn, SCTP_M_IFN);
5795                 }
5796                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5797                 /* free the vrf */
5798                 LIST_REMOVE(vrf, next_vrf);
5799                 SCTP_FREE(vrf, SCTP_M_VRF);
5800         }
5801         /* free the vrf hashes */
5802         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5803         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5804
5805         /*
5806          * free the TIMEWAIT list elements malloc'd in the function
5807          * sctp_add_vtag_to_timewait()...
5808          */
5809         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5810                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5811                 if (!LIST_EMPTY(chain)) {
5812                         prev_twait_block = NULL;
5813                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5814                                 if (prev_twait_block) {
5815                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5816                                 }
5817                                 prev_twait_block = twait_block;
5818                         }
5819                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5820                 }
5821         }
5822
5823         /* free the locks and mutexes */
5824 #ifdef SCTP_PACKET_LOGGING
5825         SCTP_IP_PKTLOG_DESTROY();
5826 #endif
5827         SCTP_IPI_ADDR_DESTROY();
5828         SCTP_STATLOG_DESTROY();
5829         SCTP_INP_INFO_LOCK_DESTROY();
5830
5831         SCTP_WQ_ADDR_DESTROY();
5832
5833         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5834         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5835         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5836         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5837         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5838         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5839         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5840         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5841         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5842         /* Get rid of other stuff to */
5843         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5844                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5845         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5846                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5847         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5848                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5849
5850 }
5851
5852
5853 int
5854 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5855     int iphlen, int offset, int limit, struct sctphdr *sh,
5856     struct sockaddr *altsa)
5857 {
5858         /*
5859          * grub through the INIT pulling addresses and loading them to the
5860          * nets structure in the asoc. The from address in the mbuf should
5861          * also be loaded (if it is not already). This routine can be called
5862          * with either INIT or INIT-ACK's as long as the m points to the IP
5863          * packet and the offset points to the beginning of the parameters.
5864          */
5865         struct sctp_inpcb *inp, *l_inp;
5866         struct sctp_nets *net, *nnet, *net_tmp;
5867         struct ip *iph;
5868         struct sctp_paramhdr *phdr, parm_buf;
5869         struct sctp_tcb *stcb_tmp;
5870         uint16_t ptype, plen;
5871         struct sockaddr *sa;
5872         struct sockaddr_storage dest_store;
5873         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
5874         struct sockaddr_in sin;
5875         struct sockaddr_in6 sin6;
5876         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
5877         struct sctp_auth_random *p_random = NULL;
5878         uint16_t random_len = 0;
5879         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
5880         struct sctp_auth_hmac_algo *hmacs = NULL;
5881         uint16_t hmacs_len = 0;
5882         uint8_t saw_asconf = 0;
5883         uint8_t saw_asconf_ack = 0;
5884         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
5885         struct sctp_auth_chunk_list *chunks = NULL;
5886         uint16_t num_chunks = 0;
5887         sctp_key_t *new_key;
5888         uint32_t keylen;
5889         int got_random = 0, got_hmacs = 0, got_chklist = 0;
5890
5891         /* First get the destination address setup too. */
5892         memset(&sin, 0, sizeof(sin));
5893         memset(&sin6, 0, sizeof(sin6));
5894
5895         sin.sin_family = AF_INET;
5896         sin.sin_len = sizeof(sin);
5897         sin.sin_port = stcb->rport;
5898
5899         sin6.sin6_family = AF_INET6;
5900         sin6.sin6_len = sizeof(struct sockaddr_in6);
5901         sin6.sin6_port = stcb->rport;
5902         if (altsa == NULL) {
5903                 iph = mtod(m, struct ip *);
5904                 switch (iph->ip_v) {
5905                 case IPVERSION:
5906                         {
5907                                 /* its IPv4 */
5908                                 struct sockaddr_in *sin_2;
5909
5910                                 sin_2 = (struct sockaddr_in *)(local_sa);
5911                                 memset(sin_2, 0, sizeof(sin));
5912                                 sin_2->sin_family = AF_INET;
5913                                 sin_2->sin_len = sizeof(sin);
5914                                 sin_2->sin_port = sh->dest_port;
5915                                 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
5916                                 sin.sin_addr = iph->ip_src;
5917                                 sa = (struct sockaddr *)&sin;
5918                                 break;
5919                         }
5920 #ifdef INET6
5921                 case IPV6_VERSION >> 4:
5922                         {
5923                                 /* its IPv6 */
5924                                 struct ip6_hdr *ip6;
5925                                 struct sockaddr_in6 *sin6_2;
5926
5927                                 ip6 = mtod(m, struct ip6_hdr *);
5928                                 sin6_2 = (struct sockaddr_in6 *)(local_sa);
5929                                 memset(sin6_2, 0, sizeof(sin6));
5930                                 sin6_2->sin6_family = AF_INET6;
5931                                 sin6_2->sin6_len = sizeof(struct sockaddr_in6);
5932                                 sin6_2->sin6_port = sh->dest_port;
5933                                 sin6.sin6_addr = ip6->ip6_src;
5934                                 sa = (struct sockaddr *)&sin6;
5935                                 break;
5936                         }
5937 #endif
5938                 default:
5939                         return (-1);
5940                         break;
5941                 }
5942         } else {
5943                 /*
5944                  * For cookies we use the src address NOT from the packet
5945                  * but from the original INIT
5946                  */
5947                 sa = altsa;
5948         }
5949         /* Turn off ECN until we get through all params */
5950         stcb->asoc.ecn_allowed = 0;
5951         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5952                 /* mark all addresses that we have currently on the list */
5953                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
5954         }
5955         /* does the source address already exist? if so skip it */
5956         l_inp = inp = stcb->sctp_ep;
5957
5958         atomic_add_int(&stcb->asoc.refcnt, 1);
5959         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
5960         atomic_add_int(&stcb->asoc.refcnt, -1);
5961
5962         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
5963                 /* we must add the source address */
5964                 /* no scope set here since we have a tcb already. */
5965                 if ((sa->sa_family == AF_INET) &&
5966                     (stcb->asoc.ipv4_addr_legal)) {
5967                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
5968                                 return (-1);
5969                         }
5970                 } else if ((sa->sa_family == AF_INET6) &&
5971                     (stcb->asoc.ipv6_addr_legal)) {
5972                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
5973                                 return (-2);
5974                         }
5975                 }
5976         } else {
5977                 if (net_tmp != NULL && stcb_tmp == stcb) {
5978                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
5979                 } else if (stcb_tmp != stcb) {
5980                         /* It belongs to another association? */
5981                         if (stcb_tmp)
5982                                 SCTP_TCB_UNLOCK(stcb_tmp);
5983                         return (-3);
5984                 }
5985         }
5986         if (stcb->asoc.state == 0) {
5987                 /* the assoc was freed? */
5988                 return (-4);
5989         }
5990         /*
5991          * peer must explicitly turn this on. This may have been initialized
5992          * to be "on" in order to allow local addr changes while INIT's are
5993          * in flight.
5994          */
5995         stcb->asoc.peer_supports_asconf = 0;
5996         /* now we must go through each of the params. */
5997         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
5998         while (phdr) {
5999                 ptype = ntohs(phdr->param_type);
6000                 plen = ntohs(phdr->param_length);
6001                 /*
6002                  * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
6003                  * (int)plen);
6004                  */
6005                 if (offset + plen > limit) {
6006                         break;
6007                 }
6008                 if (plen == 0) {
6009                         break;
6010                 }
6011                 if (ptype == SCTP_IPV4_ADDRESS) {
6012                         if (stcb->asoc.ipv4_addr_legal) {
6013                                 struct sctp_ipv4addr_param *p4, p4_buf;
6014
6015                                 /* ok get the v4 address and check/add */
6016                                 phdr = sctp_get_next_param(m, offset,
6017                                     (struct sctp_paramhdr *)&p4_buf,
6018                                     sizeof(p4_buf));
6019                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6020                                     phdr == NULL) {
6021                                         return (-5);
6022                                 }
6023                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6024                                 sin.sin_addr.s_addr = p4->addr;
6025                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6026                                         /* Skip multi-cast addresses */
6027                                         goto next_param;
6028                                 }
6029                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6030                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6031                                         goto next_param;
6032                                 }
6033                                 sa = (struct sockaddr *)&sin;
6034                                 inp = stcb->sctp_ep;
6035                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6036                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6037                                     local_sa, stcb);
6038                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6039
6040                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6041                                     inp == NULL) {
6042                                         /* we must add the source address */
6043                                         /*
6044                                          * no scope set since we have a tcb
6045                                          * already
6046                                          */
6047
6048                                         /*
6049                                          * we must validate the state again
6050                                          * here
6051                                          */
6052                         add_it_now:
6053                                         if (stcb->asoc.state == 0) {
6054                                                 /* the assoc was freed? */
6055                                                 return (-7);
6056                                         }
6057                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6058                                                 return (-8);
6059                                         }
6060                                 } else if (stcb_tmp == stcb) {
6061                                         if (stcb->asoc.state == 0) {
6062                                                 /* the assoc was freed? */
6063                                                 return (-10);
6064                                         }
6065                                         if (net != NULL) {
6066                                                 /* clear flag */
6067                                                 net->dest_state &=
6068                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6069                                         }
6070                                 } else {
6071                                         /*
6072                                          * strange, address is in another
6073                                          * assoc? straighten out locks.
6074                                          */
6075                                         if (stcb_tmp) {
6076                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6077                                                         /*
6078                                                          * in setup state we
6079                                                          * abort this guy
6080                                                          */
6081                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6082                                                             stcb_tmp, 1, NULL, 0);
6083                                                         goto add_it_now;
6084                                                 }
6085                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6086                                         }
6087                                         if (stcb->asoc.state == 0) {
6088                                                 /* the assoc was freed? */
6089                                                 return (-12);
6090                                         }
6091                                         return (-13);
6092                                 }
6093                         }
6094                 } else if (ptype == SCTP_IPV6_ADDRESS) {
6095                         if (stcb->asoc.ipv6_addr_legal) {
6096                                 /* ok get the v6 address and check/add */
6097                                 struct sctp_ipv6addr_param *p6, p6_buf;
6098
6099                                 phdr = sctp_get_next_param(m, offset,
6100                                     (struct sctp_paramhdr *)&p6_buf,
6101                                     sizeof(p6_buf));
6102                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6103                                     phdr == NULL) {
6104                                         return (-14);
6105                                 }
6106                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6107                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6108                                     sizeof(p6->addr));
6109                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6110                                         /* Skip multi-cast addresses */
6111                                         goto next_param;
6112                                 }
6113                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6114                                         /*
6115                                          * Link local make no sense without
6116                                          * scope
6117                                          */
6118                                         goto next_param;
6119                                 }
6120                                 sa = (struct sockaddr *)&sin6;
6121                                 inp = stcb->sctp_ep;
6122                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6123                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6124                                     local_sa, stcb);
6125                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6126                                 if (stcb_tmp == NULL &&
6127                                     (inp == stcb->sctp_ep || inp == NULL)) {
6128                                         /*
6129                                          * we must validate the state again
6130                                          * here
6131                                          */
6132                         add_it_now6:
6133                                         if (stcb->asoc.state == 0) {
6134                                                 /* the assoc was freed? */
6135                                                 return (-16);
6136                                         }
6137                                         /*
6138                                          * we must add the address, no scope
6139                                          * set
6140                                          */
6141                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6142                                                 return (-17);
6143                                         }
6144                                 } else if (stcb_tmp == stcb) {
6145                                         /*
6146                                          * we must validate the state again
6147                                          * here
6148                                          */
6149                                         if (stcb->asoc.state == 0) {
6150                                                 /* the assoc was freed? */
6151                                                 return (-19);
6152                                         }
6153                                         if (net != NULL) {
6154                                                 /* clear flag */
6155                                                 net->dest_state &=
6156                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6157                                         }
6158                                 } else {
6159                                         /*
6160                                          * strange, address is in another
6161                                          * assoc? straighten out locks.
6162                                          */
6163                                         if (stcb_tmp)
6164                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6165                                                         /*
6166                                                          * in setup state we
6167                                                          * abort this guy
6168                                                          */
6169                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6170                                                             stcb_tmp, 1, NULL, 0);
6171                                                         goto add_it_now6;
6172                                                 }
6173                                         SCTP_TCB_UNLOCK(stcb_tmp);
6174
6175                                         if (stcb->asoc.state == 0) {
6176                                                 /* the assoc was freed? */
6177                                                 return (-21);
6178                                         }
6179                                         return (-22);
6180                                 }
6181                         }
6182                 } else if (ptype == SCTP_ECN_CAPABLE) {
6183                         stcb->asoc.ecn_allowed = 1;
6184                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6185                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6186                                 struct sctp_adaptation_layer_indication ai,
6187                                                                 *aip;
6188
6189                                 phdr = sctp_get_next_param(m, offset,
6190                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6191                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6192                                 if (aip) {
6193                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6194                                         stcb->asoc.adaptation_needed = 1;
6195                                 }
6196                         }
6197                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6198                         struct sctp_asconf_addr_param lstore, *fee;
6199                         struct sctp_asconf_addrv4_param *fii;
6200                         int lptype;
6201                         struct sockaddr *lsa = NULL;
6202
6203                         stcb->asoc.peer_supports_asconf = 1;
6204                         if (plen > sizeof(lstore)) {
6205                                 return (-23);
6206                         }
6207                         phdr = sctp_get_next_param(m, offset,
6208                             (struct sctp_paramhdr *)&lstore,
6209                             min(plen, sizeof(lstore)));
6210                         if (phdr == NULL) {
6211                                 return (-24);
6212                         }
6213                         fee = (struct sctp_asconf_addr_param *)phdr;
6214                         lptype = ntohs(fee->addrp.ph.param_type);
6215                         if (lptype == SCTP_IPV4_ADDRESS) {
6216                                 if (plen !=
6217                                     sizeof(struct sctp_asconf_addrv4_param)) {
6218                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6219                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6220                                             plen);
6221                                 } else {
6222                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6223                                         sin.sin_addr.s_addr = fii->addrp.addr;
6224                                         lsa = (struct sockaddr *)&sin;
6225                                 }
6226                         } else if (lptype == SCTP_IPV6_ADDRESS) {
6227                                 if (plen !=
6228                                     sizeof(struct sctp_asconf_addr_param)) {
6229                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6230                                             (int)sizeof(struct sctp_asconf_addr_param),
6231                                             plen);
6232                                 } else {
6233                                         memcpy(sin6.sin6_addr.s6_addr,
6234                                             fee->addrp.addr,
6235                                             sizeof(fee->addrp.addr));
6236                                         lsa = (struct sockaddr *)&sin6;
6237                                 }
6238                         }
6239                         if (lsa) {
6240                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6241                         }
6242                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6243                         stcb->asoc.peer_supports_nat = 1;
6244                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6245                         /* Peer supports pr-sctp */
6246                         stcb->asoc.peer_supports_prsctp = 1;
6247                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6248                         /* A supported extension chunk */
6249                         struct sctp_supported_chunk_types_param *pr_supported;
6250                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6251                         int num_ent, i;
6252
6253                         phdr = sctp_get_next_param(m, offset,
6254                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6255                         if (phdr == NULL) {
6256                                 return (-25);
6257                         }
6258                         stcb->asoc.peer_supports_asconf = 0;
6259                         stcb->asoc.peer_supports_prsctp = 0;
6260                         stcb->asoc.peer_supports_pktdrop = 0;
6261                         stcb->asoc.peer_supports_strreset = 0;
6262                         stcb->asoc.peer_supports_nr_sack = 0;
6263                         stcb->asoc.peer_supports_auth = 0;
6264                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6265                         num_ent = plen - sizeof(struct sctp_paramhdr);
6266                         for (i = 0; i < num_ent; i++) {
6267                                 switch (pr_supported->chunk_types[i]) {
6268                                 case SCTP_ASCONF:
6269                                 case SCTP_ASCONF_ACK:
6270                                         stcb->asoc.peer_supports_asconf = 1;
6271                                         break;
6272                                 case SCTP_FORWARD_CUM_TSN:
6273                                         stcb->asoc.peer_supports_prsctp = 1;
6274                                         break;
6275                                 case SCTP_PACKET_DROPPED:
6276                                         stcb->asoc.peer_supports_pktdrop = 1;
6277                                         break;
6278                                 case SCTP_NR_SELECTIVE_ACK:
6279                                         stcb->asoc.peer_supports_nr_sack = 1;
6280                                         break;
6281                                 case SCTP_STREAM_RESET:
6282                                         stcb->asoc.peer_supports_strreset = 1;
6283                                         break;
6284                                 case SCTP_AUTHENTICATION:
6285                                         stcb->asoc.peer_supports_auth = 1;
6286                                         break;
6287                                 default:
6288                                         /* one I have not learned yet */
6289                                         break;
6290
6291                                 }
6292                         }
6293                 } else if (ptype == SCTP_RANDOM) {
6294                         if (plen > sizeof(random_store))
6295                                 break;
6296                         if (got_random) {
6297                                 /* already processed a RANDOM */
6298                                 goto next_param;
6299                         }
6300                         phdr = sctp_get_next_param(m, offset,
6301                             (struct sctp_paramhdr *)random_store,
6302                             min(sizeof(random_store), plen));
6303                         if (phdr == NULL)
6304                                 return (-26);
6305                         p_random = (struct sctp_auth_random *)phdr;
6306                         random_len = plen - sizeof(*p_random);
6307                         /* enforce the random length */
6308                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6309                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6310                                 return (-27);
6311                         }
6312                         got_random = 1;
6313                 } else if (ptype == SCTP_HMAC_LIST) {
6314                         int num_hmacs;
6315                         int i;
6316
6317                         if (plen > sizeof(hmacs_store))
6318                                 break;
6319                         if (got_hmacs) {
6320                                 /* already processed a HMAC list */
6321                                 goto next_param;
6322                         }
6323                         phdr = sctp_get_next_param(m, offset,
6324                             (struct sctp_paramhdr *)hmacs_store,
6325                             min(plen, sizeof(hmacs_store)));
6326                         if (phdr == NULL)
6327                                 return (-28);
6328                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6329                         hmacs_len = plen - sizeof(*hmacs);
6330                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6331                         /* validate the hmac list */
6332                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6333                                 return (-29);
6334                         }
6335                         if (stcb->asoc.peer_hmacs != NULL)
6336                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6337                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6338                         if (stcb->asoc.peer_hmacs != NULL) {
6339                                 for (i = 0; i < num_hmacs; i++) {
6340                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6341                                             ntohs(hmacs->hmac_ids[i]));
6342                                 }
6343                         }
6344                         got_hmacs = 1;
6345                 } else if (ptype == SCTP_CHUNK_LIST) {
6346                         int i;
6347
6348                         if (plen > sizeof(chunks_store))
6349                                 break;
6350                         if (got_chklist) {
6351                                 /* already processed a Chunks list */
6352                                 goto next_param;
6353                         }
6354                         phdr = sctp_get_next_param(m, offset,
6355                             (struct sctp_paramhdr *)chunks_store,
6356                             min(plen, sizeof(chunks_store)));
6357                         if (phdr == NULL)
6358                                 return (-30);
6359                         chunks = (struct sctp_auth_chunk_list *)phdr;
6360                         num_chunks = plen - sizeof(*chunks);
6361                         if (stcb->asoc.peer_auth_chunks != NULL)
6362                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6363                         else
6364                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6365                         for (i = 0; i < num_chunks; i++) {
6366                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6367                                     stcb->asoc.peer_auth_chunks);
6368                                 /* record asconf/asconf-ack if listed */
6369                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6370                                         saw_asconf = 1;
6371                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6372                                         saw_asconf_ack = 1;
6373
6374                         }
6375                         got_chklist = 1;
6376                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6377                             (ptype == SCTP_STATE_COOKIE) ||
6378                             (ptype == SCTP_UNRECOG_PARAM) ||
6379                             (ptype == SCTP_COOKIE_PRESERVE) ||
6380                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6381                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6382                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6383                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6384                     (ptype == SCTP_SUCCESS_REPORT)) {
6385                          /* don't care */ ;
6386                 } else {
6387                         if ((ptype & 0x8000) == 0x0000) {
6388                                 /*
6389                                  * must stop processing the rest of the
6390                                  * param's. Any report bits were handled
6391                                  * with the call to
6392                                  * sctp_arethere_unrecognized_parameters()
6393                                  * when the INIT or INIT-ACK was first seen.
6394                                  */
6395                                 break;
6396                         }
6397                 }
6398
6399 next_param:
6400                 offset += SCTP_SIZE32(plen);
6401                 if (offset >= limit) {
6402                         break;
6403                 }
6404                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6405                     sizeof(parm_buf));
6406         }
6407         /* Now check to see if we need to purge any addresses */
6408         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6409                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6410                     SCTP_ADDR_NOT_IN_ASSOC) {
6411                         /* This address has been removed from the asoc */
6412                         /* remove and free it */
6413                         stcb->asoc.numnets--;
6414                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6415                         sctp_free_remote_addr(net);
6416                         if (net == stcb->asoc.primary_destination) {
6417                                 stcb->asoc.primary_destination = NULL;
6418                                 sctp_select_primary_destination(stcb);
6419                         }
6420                 }
6421         }
6422         /* validate authentication required parameters */
6423         if (got_random && got_hmacs) {
6424                 stcb->asoc.peer_supports_auth = 1;
6425         } else {
6426                 stcb->asoc.peer_supports_auth = 0;
6427         }
6428         if (!stcb->asoc.peer_supports_auth && got_chklist) {
6429                 /* peer does not support auth but sent a chunks list? */
6430                 return (-31);
6431         }
6432         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6433             !stcb->asoc.peer_supports_auth) {
6434                 /* peer supports asconf but not auth? */
6435                 return (-32);
6436         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6437             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6438                 return (-33);
6439         }
6440         /* concatenate the full random key */
6441         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6442         if (chunks != NULL) {
6443                 keylen += sizeof(*chunks) + num_chunks;
6444         }
6445         new_key = sctp_alloc_key(keylen);
6446         if (new_key != NULL) {
6447                 /* copy in the RANDOM */
6448                 if (p_random != NULL) {
6449                         keylen = sizeof(*p_random) + random_len;
6450                         bcopy(p_random, new_key->key, keylen);
6451                 }
6452                 /* append in the AUTH chunks */
6453                 if (chunks != NULL) {
6454                         bcopy(chunks, new_key->key + keylen,
6455                             sizeof(*chunks) + num_chunks);
6456                         keylen += sizeof(*chunks) + num_chunks;
6457                 }
6458                 /* append in the HMACs */
6459                 if (hmacs != NULL) {
6460                         bcopy(hmacs, new_key->key + keylen,
6461                             sizeof(*hmacs) + hmacs_len);
6462                 }
6463         } else {
6464                 /* failed to get memory for the key */
6465                 return (-34);
6466         }
6467         if (stcb->asoc.authinfo.peer_random != NULL)
6468                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6469         stcb->asoc.authinfo.peer_random = new_key;
6470         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6471         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6472
6473         return (0);
6474 }
6475
6476 int
6477 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6478     struct sctp_nets *net)
6479 {
6480         /* make sure the requested primary address exists in the assoc */
6481         if (net == NULL && sa)
6482                 net = sctp_findnet(stcb, sa);
6483
6484         if (net == NULL) {
6485                 /* didn't find the requested primary address! */
6486                 return (-1);
6487         } else {
6488                 /* set the primary address */
6489                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6490                         /* Must be confirmed, so queue to set */
6491                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6492                         return (0);
6493                 }
6494                 stcb->asoc.primary_destination = net;
6495                 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
6496                 net = TAILQ_FIRST(&stcb->asoc.nets);
6497                 if (net != stcb->asoc.primary_destination) {
6498                         /*
6499                          * first one on the list is NOT the primary
6500                          * sctp_cmpaddr() is much more efficient if the
6501                          * primary is the first on the list, make it so.
6502                          */
6503                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6504                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6505                 }
6506                 return (0);
6507         }
6508 }
6509
6510 int
6511 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait)
6512 {
6513         /*
6514          * This function serves two purposes. It will see if a TAG can be
6515          * re-used and return 1 for yes it is ok and 0 for don't use that
6516          * tag. A secondary function it will do is purge out old tags that
6517          * can be removed.
6518          */
6519         struct sctpvtaghead *chain;
6520         struct sctp_tagblock *twait_block;
6521         struct sctpasochead *head;
6522         struct sctp_tcb *stcb;
6523         int i;
6524
6525         SCTP_INP_INFO_RLOCK();
6526         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6527             SCTP_BASE_INFO(hashasocmark))];
6528         if (head == NULL) {
6529                 /* invalid vtag */
6530                 goto skip_vtag_check;
6531         }
6532         LIST_FOREACH(stcb, head, sctp_asocs) {
6533                 /*
6534                  * We choose not to lock anything here. TCB's can't be
6535                  * removed since we have the read lock, so they can't be
6536                  * freed on us, same thing for the INP. I may be wrong with
6537                  * this assumption, but we will go with it for now :-)
6538                  */
6539                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6540                         continue;
6541                 }
6542                 if (stcb->asoc.my_vtag == tag) {
6543                         /* candidate */
6544                         if (stcb->rport != rport) {
6545                                 continue;
6546                         }
6547                         if (stcb->sctp_ep->sctp_lport != lport) {
6548                                 continue;
6549                         }
6550                         /* Its a used tag set */
6551                         SCTP_INP_INFO_RUNLOCK();
6552                         return (0);
6553                 }
6554         }
6555 skip_vtag_check:
6556
6557         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6558         /* Now what about timed wait ? */
6559         if (!LIST_EMPTY(chain)) {
6560                 /*
6561                  * Block(s) are present, lets see if we have this tag in the
6562                  * list
6563                  */
6564                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6565                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6566                                 if (twait_block->vtag_block[i].v_tag == 0) {
6567                                         /* not used */
6568                                         continue;
6569                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6570                                     now->tv_sec) {
6571                                         /* Audit expires this guy */
6572                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
6573                                         twait_block->vtag_block[i].v_tag = 0;
6574                                         twait_block->vtag_block[i].lport = 0;
6575                                         twait_block->vtag_block[i].rport = 0;
6576                                 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6577                                             (twait_block->vtag_block[i].lport == lport) &&
6578                                     (twait_block->vtag_block[i].rport == rport)) {
6579                                         /* Bad tag, sorry :< */
6580                                         SCTP_INP_INFO_RUNLOCK();
6581                                         return (0);
6582                                 }
6583                         }
6584                 }
6585         }
6586         SCTP_INP_INFO_RUNLOCK();
6587         return (1);
6588 }
6589
6590
6591 static sctp_assoc_t reneged_asoc_ids[256];
6592 static uint8_t reneged_at = 0;
6593
6594
6595 static void
6596 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
6597 {
6598         /*
6599          * We must hunt this association for MBUF's past the cumack (i.e.
6600          * out of order data that we can renege on).
6601          */
6602         struct sctp_association *asoc;
6603         struct sctp_tmit_chunk *chk, *nchk;
6604         uint32_t cumulative_tsn_p1;
6605         struct sctp_queued_to_read *ctl, *nctl;
6606         int cnt, strmat;
6607         uint32_t gap, i;
6608         int fnd = 0;
6609
6610         /* We look for anything larger than the cum-ack + 1 */
6611
6612         asoc = &stcb->asoc;
6613         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6614                 /* none we can reneg on. */
6615                 return;
6616         }
6617         SCTP_STAT_INCR(sctps_protocol_drains_done);
6618         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6619         cnt = 0;
6620         /* First look in the re-assembly queue */
6621         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6622                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6623                         /* Yep it is above cum-ack */
6624                         cnt++;
6625                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6626                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6627                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6628                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6629                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6630                         if (chk->data) {
6631                                 sctp_m_freem(chk->data);
6632                                 chk->data = NULL;
6633                         }
6634                         sctp_free_a_chunk(stcb, chk);
6635                 }
6636         }
6637         /* Ok that was fun, now we will drain all the inbound streams? */
6638         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6639                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6640                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6641                                 /* Yep it is above cum-ack */
6642                                 cnt++;
6643                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6644                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6645                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6646                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6647                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6648                                 if (ctl->data) {
6649                                         sctp_m_freem(ctl->data);
6650                                         ctl->data = NULL;
6651                                 }
6652                                 sctp_free_remote_addr(ctl->whoFrom);
6653                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6654                                 SCTP_DECR_READQ_COUNT();
6655                         }
6656                 }
6657         }
6658         if (cnt) {
6659                 /* We must back down to see what the new highest is */
6660                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6661                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6662                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6663                                 asoc->highest_tsn_inside_map = i;
6664                                 fnd = 1;
6665                                 break;
6666                         }
6667                 }
6668                 if (!fnd) {
6669                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6670                 }
6671                 /*
6672                  * Question, should we go through the delivery queue? The
6673                  * only reason things are on here is the app not reading OR
6674                  * a p-d-api up. An attacker COULD send enough in to
6675                  * initiate the PD-API and then send a bunch of stuff to
6676                  * other streams... these would wind up on the delivery
6677                  * queue.. and then we would not get to them. But in order
6678                  * to do this I then have to back-track and un-deliver
6679                  * sequence numbers in streams.. el-yucko. I think for now
6680                  * we will NOT look at the delivery queue and leave it to be
6681                  * something to consider later. An alternative would be to
6682                  * abort the P-D-API with a notification and then deliver
6683                  * the data.... Or another method might be to keep track of
6684                  * how many times the situation occurs and if we see a
6685                  * possible attack underway just abort the association.
6686                  */
6687 #ifdef SCTP_DEBUG
6688                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6689 #endif
6690                 /*
6691                  * Now do we need to find a new
6692                  * asoc->highest_tsn_inside_map?
6693                  */
6694                 asoc->last_revoke_count = cnt;
6695                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6696                 /* sa_ignore NO_NULL_CHK */
6697                 sctp_send_sack(stcb);
6698                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6699                 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
6700                 reneged_at++;
6701         }
6702         /*
6703          * Another issue, in un-setting the TSN's in the mapping array we
6704          * DID NOT adjust the highest_tsn marker.  This will cause one of
6705          * two things to occur. It may cause us to do extra work in checking
6706          * for our mapping array movement. More importantly it may cause us
6707          * to SACK every datagram. This may not be a bad thing though since
6708          * we will recover once we get our cum-ack above and all this stuff
6709          * we dumped recovered.
6710          */
6711 }
6712
6713 void
6714 sctp_drain()
6715 {
6716         /*
6717          * We must walk the PCB lists for ALL associations here. The system
6718          * is LOW on MBUF's and needs help. This is where reneging will
6719          * occur. We really hope this does NOT happen!
6720          */
6721         VNET_ITERATOR_DECL(vnet_iter);
6722         VNET_LIST_RLOCK_NOSLEEP();
6723         VNET_FOREACH(vnet_iter) {
6724                 CURVNET_SET(vnet_iter);
6725                 struct sctp_inpcb *inp;
6726                 struct sctp_tcb *stcb;
6727
6728                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6729                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6730 #ifdef VIMAGE
6731                         continue;
6732 #else
6733                         return;
6734 #endif
6735                 }
6736                 SCTP_INP_INFO_RLOCK();
6737                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6738                         /* For each endpoint */
6739                         SCTP_INP_RLOCK(inp);
6740                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6741                                 /* For each association */
6742                                 SCTP_TCB_LOCK(stcb);
6743                                 sctp_drain_mbufs(inp, stcb);
6744                                 SCTP_TCB_UNLOCK(stcb);
6745                         }
6746                         SCTP_INP_RUNLOCK(inp);
6747                 }
6748                 SCTP_INP_INFO_RUNLOCK();
6749                 CURVNET_RESTORE();
6750         }
6751         VNET_LIST_RUNLOCK_NOSLEEP();
6752 }
6753
6754 /*
6755  * start a new iterator
6756  * iterates through all endpoints and associations based on the pcb_state
6757  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6758  * assocs and "ef" (optional) is executed when the iterator completes.
6759  * "inpf" (optional) is executed for each new endpoint as it is being
6760  * iterated through. inpe (optional) is called when the inp completes
6761  * its way through all the stcbs.
6762  */
6763 int
6764 sctp_initiate_iterator(inp_func inpf,
6765     asoc_func af,
6766     inp_func inpe,
6767     uint32_t pcb_state,
6768     uint32_t pcb_features,
6769     uint32_t asoc_state,
6770     void *argp,
6771     uint32_t argi,
6772     end_func ef,
6773     struct sctp_inpcb *s_inp,
6774     uint8_t chunk_output_off)
6775 {
6776         struct sctp_iterator *it = NULL;
6777
6778         if (af == NULL) {
6779                 return (-1);
6780         }
6781         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6782             SCTP_M_ITER);
6783         if (it == NULL) {
6784                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6785                 return (ENOMEM);
6786         }
6787         memset(it, 0, sizeof(*it));
6788         it->function_assoc = af;
6789         it->function_inp = inpf;
6790         if (inpf)
6791                 it->done_current_ep = 0;
6792         else
6793                 it->done_current_ep = 1;
6794         it->function_atend = ef;
6795         it->pointer = argp;
6796         it->val = argi;
6797         it->pcb_flags = pcb_state;
6798         it->pcb_features = pcb_features;
6799         it->asoc_state = asoc_state;
6800         it->function_inp_end = inpe;
6801         it->no_chunk_output = chunk_output_off;
6802         it->vn = curvnet;
6803         if (s_inp) {
6804                 /* Assume lock is held here */
6805                 it->inp = s_inp;
6806                 SCTP_INP_INCR_REF(it->inp);
6807                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
6808         } else {
6809                 SCTP_INP_INFO_RLOCK();
6810                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
6811                 if (it->inp) {
6812                         SCTP_INP_INCR_REF(it->inp);
6813                 }
6814                 SCTP_INP_INFO_RUNLOCK();
6815                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
6816
6817         }
6818         SCTP_IPI_ITERATOR_WQ_LOCK();
6819
6820         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
6821         if (sctp_it_ctl.iterator_running == 0) {
6822                 sctp_wakeup_iterator();
6823         }
6824         SCTP_IPI_ITERATOR_WQ_UNLOCK();
6825         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
6826         return (0);
6827 }