sys/netinet/sctp_pcb.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
   5  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
   6  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are met:
  10  *
  11  * a) Redistributions of source code must retain the above copyright notice,
  12  *    this list of conditions and the following disclaimer.
  13  *
  14  * b) Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the distribution.
  17  *
  18  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  19  *    contributors may be used to endorse or promote products derived
  20  *    from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  24  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  26  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  32  * THE POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 __FBSDID("$FreeBSD$");
  37
  38 #include <netinet/sctp_os.h>
  39 #include <sys/proc.h>
  40 #include <netinet/sctp_var.h>
  41 #include <netinet/sctp_sysctl.h>
  42 #include <netinet/sctp_pcb.h>
  43 #include <netinet/sctputil.h>
  44 #include <netinet/sctp.h>
  45 #include <netinet/sctp_header.h>
  46 #include <netinet/sctp_asconf.h>
  47 #include <netinet/sctp_output.h>
  48 #include <netinet/sctp_timer.h>
  49 #include <netinet/sctp_bsd_addr.h>
  50 #if defined(INET) || defined(INET6)
  51 #include <netinet/udp.h>
  52 #endif
  53 #ifdef INET6
  54 #include <netinet6/ip6_var.h>
  55 #endif
  56 #include <sys/sched.h>
  57 #include <sys/smp.h>
  58 #include <sys/unistd.h>
  59
  60
  61 VNET_DEFINE(struct sctp_base_info, system_base_info);
  62
  63 /* FIX: we don't handle multiple link local scopes */
  64 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  65 #ifdef INET6
  66 int
  67 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  68 {
  69         struct sockaddr_in6 tmp_a, tmp_b;
  70
  71         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  72         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  73                 return (0);
  74         }
  75         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  76         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  77                 return (0);
  78         }
  79         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  80 }
  81 #endif
  82
  83 void
  84 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  85 {
  86         /*
  87          * We really don't need to lock this, but I will just because it
  88          * does not hurt.
  89          */
  90         SCTP_INP_INFO_RLOCK();
  91         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  92         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  93         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  94         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  95         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  96         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  97         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  98         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
  99         SCTP_INP_INFO_RUNLOCK();
 100 }
 101
 102 /*-
 103  * Addresses are added to VRF's (Virtual Router's). For BSD we
 104  * have only the default VRF 0. We maintain a hash list of
 105  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
 106  * these has a list of addresses. When we add a new address
 107  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 108  * not exist we create it and add it to the list of IFN's
 109  * within the VRF. Once we have the sctp_ifn, we add the
 110  * address to the list. So we look something like:
 111  *
 112  * hash-vrf-table
 113  *   vrf-> ifn-> ifn -> ifn
 114  *   vrf    |
 115  *    ...   +--ifa-> ifa -> ifa
 116  *   vrf
 117  *
 118  * We keep these separate lists since the SCTP subsystem will
 119  * point to these from its source address selection nets structure.
 120  * When an address is deleted it does not happen right away on
 121  * the SCTP side, it gets scheduled. What we do when a
 122  * delete happens is immediately remove the address from
 123  * the master list and decrement the refcount. As our
 124  * addip iterator works through and frees the src address
 125  * selection pointing to the sctp_ifa, eventually the refcount
 126  * will reach 0 and we will delete it. Note that it is assumed
 127  * that any locking on system level ifn/ifa is done at the
 128  * caller of these functions and these routines will only
 129  * lock the SCTP structures as they add or delete things.
 130  *
 131  * Other notes on VRF concepts.
 132  *  - An endpoint can be in multiple VRF's
 133  *  - An association lives within a VRF and only one VRF.
 134  *  - Any incoming packet we can deduce the VRF for by
 135  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 136  *  - Any downward send call or connect call must supply the
 137  *    VRF via ancillary data or via some sort of set default
 138  *    VRF socket option call (again for BSD no brainer since
 139  *    the VRF is always 0).
 140  *  - An endpoint may add multiple VRF's to it.
 141  *  - Listening sockets can accept associations in any
 142  *    of the VRF's they are in but the assoc will end up
 143  *    in only one VRF (gotten from the packet or connect/send).
 144  *
 145  */
 146
 147 struct sctp_vrf *
 148 sctp_allocate_vrf(int vrf_id)
 149 {
 150         struct sctp_vrf *vrf = NULL;
 151         struct sctp_vrflist *bucket;
 152
 153         /* First allocate the VRF structure */
 154         vrf = sctp_find_vrf(vrf_id);
 155         if (vrf) {
 156                 /* Already allocated */
 157                 return (vrf);
 158         }
 159         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 160             SCTP_M_VRF);
 161         if (vrf == NULL) {
 162                 /* No memory */
 163 #ifdef INVARIANTS
 164                 panic("No memory for VRF:%d", vrf_id);
 165 #endif
 166                 return (NULL);
 167         }
 168         /* setup the VRF */
 169         memset(vrf, 0, sizeof(struct sctp_vrf));
 170         vrf->vrf_id = vrf_id;
 171         LIST_INIT(&vrf->ifnlist);
 172         vrf->total_ifa_count = 0;
 173         vrf->refcount = 0;
 174         /* now also setup table ids */
 175         SCTP_INIT_VRF_TABLEID(vrf);
 176         /* Init the HASH of addresses */
 177         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 178             &vrf->vrf_addr_hashmark);
 179         if (vrf->vrf_addr_hash == NULL) {
 180                 /* No memory */
 181 #ifdef INVARIANTS
 182                 panic("No memory for VRF:%d", vrf_id);
 183 #endif
 184                 SCTP_FREE(vrf, SCTP_M_VRF);
 185                 return (NULL);
 186         }
 187
 188         /* Add it to the hash table */
 189         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 190         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 191         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 192         return (vrf);
 193 }
 194
 195
 196 struct sctp_ifn *
 197 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 198 {
 199         struct sctp_ifn *sctp_ifnp;
 200         struct sctp_ifnlist *hash_ifn_head;
 201
 202         /*
 203          * We assume the lock is held for the addresses if that's wrong
 204          * problems could occur :-)
 205          */
 206         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 207         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 208                 if (sctp_ifnp->ifn_index == ifn_index) {
 209                         return (sctp_ifnp);
 210                 }
 211                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 212                         return (sctp_ifnp);
 213                 }
 214         }
 215         return (NULL);
 216 }
 217
 218
 219 struct sctp_vrf *
 220 sctp_find_vrf(uint32_t vrf_id)
 221 {
 222         struct sctp_vrflist *bucket;
 223         struct sctp_vrf *liste;
 224
 225         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 226         LIST_FOREACH(liste, bucket, next_vrf) {
 227                 if (vrf_id == liste->vrf_id) {
 228                         return (liste);
 229                 }
 230         }
 231         return (NULL);
 232 }
 233
 234
 235 void
 236 sctp_free_vrf(struct sctp_vrf *vrf)
 237 {
 238         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 239                 if (vrf->vrf_addr_hash) {
 240                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 241                         vrf->vrf_addr_hash = NULL;
 242                 }
 243                 /* We zero'd the count */
 244                 LIST_REMOVE(vrf, next_vrf);
 245                 SCTP_FREE(vrf, SCTP_M_VRF);
 246                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 247         }
 248 }
 249
 250
 251 void
 252 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 253 {
 254         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 255                 /* We zero'd the count */
 256                 if (sctp_ifnp->vrf) {
 257                         sctp_free_vrf(sctp_ifnp->vrf);
 258                 }
 259                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 260                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 261         }
 262 }
 263
 264
 265 void
 266 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 267 {
 268         struct sctp_ifn *sctp_ifnp;
 269
 270         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 271         if (sctp_ifnp != NULL) {
 272                 sctp_ifnp->ifn_mtu = mtu;
 273         }
 274 }
 275
 276
 277 void
 278 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 279 {
 280         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 281                 /* We zero'd the count */
 282                 if (sctp_ifap->ifn_p) {
 283                         sctp_free_ifn(sctp_ifap->ifn_p);
 284                 }
 285                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 286                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 287         }
 288 }
 289
 290
 291 static void
 292 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 293 {
 294         struct sctp_ifn *found;
 295
 296         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 297         if (found == NULL) {
 298                 /* Not in the list.. sorry */
 299                 return;
 300         }
 301         if (hold_addr_lock == 0)
 302                 SCTP_IPI_ADDR_WLOCK();
 303         LIST_REMOVE(sctp_ifnp, next_bucket);
 304         LIST_REMOVE(sctp_ifnp, next_ifn);
 305         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 306             sctp_ifnp->registered_af);
 307         if (hold_addr_lock == 0)
 308                 SCTP_IPI_ADDR_WUNLOCK();
 309         /* Take away the reference, and possibly free it */
 310         sctp_free_ifn(sctp_ifnp);
 311 }
 312
 313
 314 void
 315 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 316     const char *if_name, uint32_t ifn_index)
 317 {
 318         struct sctp_vrf *vrf;
 319         struct sctp_ifa *sctp_ifap;
 320
 321         SCTP_IPI_ADDR_RLOCK();
 322         vrf = sctp_find_vrf(vrf_id);
 323         if (vrf == NULL) {
 324                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 325                 goto out;
 326
 327         }
 328         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 329         if (sctp_ifap == NULL) {
 330                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 331                 goto out;
 332         }
 333         if (sctp_ifap->ifn_p == NULL) {
 334                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
 335                 goto out;
 336         }
 337         if (if_name) {
 338                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 339                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 340                             sctp_ifap->ifn_p->ifn_name, if_name);
 341                         goto out;
 342                 }
 343         } else {
 344                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 345                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 346                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 347                         goto out;
 348                 }
 349         }
 350
 351         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 352         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 353 out:
 354         SCTP_IPI_ADDR_RUNLOCK();
 355 }
 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;
 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 unusable\n");
 379                 goto out;
 380         }
 381         if (if_name) {
 382                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 383                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 384                             sctp_ifap->ifn_p->ifn_name, if_name);
 385                         goto out;
 386                 }
 387         } else {
 388                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 389                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 390                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 391                         goto out;
 392                 }
 393         }
 394
 395         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 396         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 397 out:
 398         SCTP_IPI_ADDR_RUNLOCK();
 399 }
 400
 401
 402 /*-
 403  * Add an ifa to an ifn.
 404  * Register the interface as necessary.
 405  * NOTE: ADDR write lock MUST be held.
 406  */
 407 static void
 408 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 409 {
 410         int ifa_af;
 411
 412         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 413         sctp_ifap->ifn_p = sctp_ifnp;
 414         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 415         /* update address counts */
 416         sctp_ifnp->ifa_count++;
 417         ifa_af = sctp_ifap->address.sa.sa_family;
 418         switch (ifa_af) {
 419 #ifdef INET
 420         case AF_INET:
 421                 sctp_ifnp->num_v4++;
 422                 break;
 423 #endif
 424 #ifdef INET6
 425         case AF_INET6:
 426                 sctp_ifnp->num_v6++;
 427                 break;
 428 #endif
 429         default:
 430                 break;
 431         }
 432         if (sctp_ifnp->ifa_count == 1) {
 433                 /* register the new interface */
 434                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 435                 sctp_ifnp->registered_af = ifa_af;
 436         }
 437 }
 438
 439
 440 /*-
 441  * Remove an ifa from its ifn.
 442  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 443  * the interface based on the remaining address families left.
 444  * NOTE: ADDR write lock MUST be held.
 445  */
 446 static void
 447 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 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                 switch (sctp_ifap->address.sa.sa_family) {
 454 #ifdef INET
 455                 case AF_INET:
 456                         sctp_ifap->ifn_p->num_v4--;
 457                         break;
 458 #endif
 459 #ifdef INET6
 460                 case AF_INET6:
 461                         sctp_ifap->ifn_p->num_v6--;
 462                         break;
 463 #endif
 464                 default:
 465                         break;
 466                 }
 467
 468                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 469                         /* remove the ifn, possibly freeing it */
 470                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 471                 } else {
 472                         /* re-register address family type, if needed */
 473                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 474                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 475                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 476                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 477                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 478                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 479                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 480                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 481                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 482                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 483                         }
 484                         /* free the ifn refcount */
 485                         sctp_free_ifn(sctp_ifap->ifn_p);
 486                 }
 487                 sctp_ifap->ifn_p = NULL;
 488         }
 489 }
 490
 491
 492 struct sctp_ifa *
 493 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 494     uint32_t ifn_type, const char *if_name, void *ifa,
 495     struct sockaddr *addr, uint32_t ifa_flags,
 496     int dynamic_add)
 497 {
 498         struct sctp_vrf *vrf;
 499         struct sctp_ifn *sctp_ifnp = NULL;
 500         struct sctp_ifa *sctp_ifap = NULL;
 501         struct sctp_ifalist *hash_addr_head;
 502         struct sctp_ifnlist *hash_ifn_head;
 503         uint32_t hash_of_addr;
 504         int new_ifn_af = 0;
 505
 506 #ifdef SCTP_DEBUG
 507         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 508         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 509 #endif
 510         SCTP_IPI_ADDR_WLOCK();
 511         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 512         if (sctp_ifnp) {
 513                 vrf = sctp_ifnp->vrf;
 514         } else {
 515                 vrf = sctp_find_vrf(vrf_id);
 516                 if (vrf == NULL) {
 517                         vrf = sctp_allocate_vrf(vrf_id);
 518                         if (vrf == NULL) {
 519                                 SCTP_IPI_ADDR_WUNLOCK();
 520                                 return (NULL);
 521                         }
 522                 }
 523         }
 524         if (sctp_ifnp == NULL) {
 525                 /*
 526                  * build one and add it, can't hold lock until after malloc
 527                  * done though.
 528                  */
 529                 SCTP_IPI_ADDR_WUNLOCK();
 530                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 531                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 532                 if (sctp_ifnp == NULL) {
 533 #ifdef INVARIANTS
 534                         panic("No memory for IFN");
 535 #endif
 536                         return (NULL);
 537                 }
 538                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 539                 sctp_ifnp->ifn_index = ifn_index;
 540                 sctp_ifnp->ifn_p = ifn;
 541                 sctp_ifnp->ifn_type = ifn_type;
 542                 sctp_ifnp->refcount = 0;
 543                 sctp_ifnp->vrf = vrf;
 544                 atomic_add_int(&vrf->refcount, 1);
 545                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 546                 if (if_name != NULL) {
 547                         SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
 548                 } else {
 549                         SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
 550                 }
 551                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 552                 LIST_INIT(&sctp_ifnp->ifalist);
 553                 SCTP_IPI_ADDR_WLOCK();
 554                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 555                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 556                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 557                 new_ifn_af = 1;
 558         }
 559         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 560         if (sctp_ifap) {
 561                 /* Hmm, it already exists? */
 562                 if ((sctp_ifap->ifn_p) &&
 563                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 564                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 565                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 566                             (void *)sctp_ifap);
 567                         if (new_ifn_af) {
 568                                 /* Remove the created one that we don't want */
 569                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 570                         }
 571                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 572                                 /* easy to solve, just switch back to active */
 573                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 574                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 575                                 sctp_ifap->ifn_p = sctp_ifnp;
 576                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 577                         }
 578         exit_stage_left:
 579                         SCTP_IPI_ADDR_WUNLOCK();
 580                         return (sctp_ifap);
 581                 } else {
 582                         if (sctp_ifap->ifn_p) {
 583                                 /*
 584                                  * The last IFN gets the address, remove the
 585                                  * old one
 586                                  */
 587                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 588                                     (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 589                                     sctp_ifap->ifn_p->ifn_index, if_name,
 590                                     ifn_index);
 591                                 /* remove the address from the old ifn */
 592                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 593                                 /* move the address over to the new ifn */
 594                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 595                                 goto exit_stage_left;
 596                         } else {
 597                                 /* repair ifnp which was NULL ? */
 598                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 599                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 600                                     (void *)sctp_ifnp, (void *)sctp_ifap);
 601                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 602                         }
 603                         goto exit_stage_left;
 604                 }
 605         }
 606         SCTP_IPI_ADDR_WUNLOCK();
 607         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 608         if (sctp_ifap == NULL) {
 609 #ifdef INVARIANTS
 610                 panic("No memory for IFA");
 611 #endif
 612                 return (NULL);
 613         }
 614         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 615         sctp_ifap->ifn_p = sctp_ifnp;
 616         atomic_add_int(&sctp_ifnp->refcount, 1);
 617         sctp_ifap->vrf_id = vrf_id;
 618         sctp_ifap->ifa = ifa;
 619         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 620         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 621         sctp_ifap->flags = ifa_flags;
 622         /* Set scope */
 623         switch (sctp_ifap->address.sa.sa_family) {
 624 #ifdef INET
 625         case AF_INET:
 626                 {
 627                         struct sockaddr_in *sin;
 628
 629                         sin = &sctp_ifap->address.sin;
 630                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 631                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 632                                 sctp_ifap->src_is_loop = 1;
 633                         }
 634                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 635                                 sctp_ifap->src_is_priv = 1;
 636                         }
 637                         sctp_ifnp->num_v4++;
 638                         if (new_ifn_af)
 639                                 new_ifn_af = AF_INET;
 640                         break;
 641                 }
 642 #endif
 643 #ifdef INET6
 644         case AF_INET6:
 645                 {
 646                         /* ok to use deprecated addresses? */
 647                         struct sockaddr_in6 *sin6;
 648
 649                         sin6 = &sctp_ifap->address.sin6;
 650                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 651                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 652                                 sctp_ifap->src_is_loop = 1;
 653                         }
 654                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 655                                 sctp_ifap->src_is_priv = 1;
 656                         }
 657                         sctp_ifnp->num_v6++;
 658                         if (new_ifn_af)
 659                                 new_ifn_af = AF_INET6;
 660                         break;
 661                 }
 662 #endif
 663         default:
 664                 new_ifn_af = 0;
 665                 break;
 666         }
 667         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 668
 669         if ((sctp_ifap->src_is_priv == 0) &&
 670             (sctp_ifap->src_is_loop == 0)) {
 671                 sctp_ifap->src_is_glob = 1;
 672         }
 673         SCTP_IPI_ADDR_WLOCK();
 674         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 675         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 676         sctp_ifap->refcount = 1;
 677         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 678         sctp_ifnp->ifa_count++;
 679         vrf->total_ifa_count++;
 680         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 681         if (new_ifn_af) {
 682                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 683                 sctp_ifnp->registered_af = new_ifn_af;
 684         }
 685         SCTP_IPI_ADDR_WUNLOCK();
 686         if (dynamic_add) {
 687                 /*
 688                  * Bump up the refcount so that when the timer completes it
 689                  * will drop back down.
 690                  */
 691                 struct sctp_laddr *wi;
 692
 693                 atomic_add_int(&sctp_ifap->refcount, 1);
 694                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 695                 if (wi == NULL) {
 696                         /*
 697                          * Gak, what can we do? We have lost an address
 698                          * change can you say HOSED?
 699                          */
 700                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 701                         /* Opps, must decrement the count */
 702                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 703                             if_name);
 704                         return (NULL);
 705                 }
 706                 SCTP_INCR_LADDR_COUNT();
 707                 memset(wi, 0, sizeof(*wi));
 708                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 709                 wi->ifa = sctp_ifap;
 710                 wi->action = SCTP_ADD_IP_ADDRESS;
 711
 712                 SCTP_WQ_ADDR_LOCK();
 713                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 714                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 715                     (struct sctp_inpcb *)NULL,
 716                     (struct sctp_tcb *)NULL,
 717                     (struct sctp_nets *)NULL);
 718                 SCTP_WQ_ADDR_UNLOCK();
 719         } else {
 720                 /* it's ready for use */
 721                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 722         }
 723         return (sctp_ifap);
 724 }
 725
 726 void
 727 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 728     uint32_t ifn_index, const char *if_name)
 729 {
 730         struct sctp_vrf *vrf;
 731         struct sctp_ifa *sctp_ifap = NULL;
 732
 733         SCTP_IPI_ADDR_WLOCK();
 734         vrf = sctp_find_vrf(vrf_id);
 735         if (vrf == NULL) {
 736                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 737                 goto out_now;
 738         }
 739
 740 #ifdef SCTP_DEBUG
 741         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 742         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 743 #endif
 744         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 745         if (sctp_ifap) {
 746                 /* Validate the delete */
 747                 if (sctp_ifap->ifn_p) {
 748                         int valid = 0;
 749
 750                         /*-
 751                          * The name has priority over the ifn_index
 752                          * if its given. We do this especially for
 753                          * panda who might recycle indexes fast.
 754                          */
 755                         if (if_name) {
 756                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 757                                         /* They match its a correct delete */
 758                                         valid = 1;
 759                                 }
 760                         }
 761                         if (!valid) {
 762                                 /* last ditch check ifn_index */
 763                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 764                                         valid = 1;
 765                                 }
 766                         }
 767                         if (!valid) {
 768                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 769                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 770                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 771                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 772                                 SCTP_IPI_ADDR_WUNLOCK();
 773                                 return;
 774                         }
 775                 }
 776                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
 777                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 778                 /*
 779                  * We don't set the flag. This means that the structure will
 780                  * hang around in EP's that have bound specific to it until
 781                  * they close. This gives us TCP like behavior if someone
 782                  * removes an address (or for that matter adds it right
 783                  * back).
 784                  */
 785                 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
 786                 vrf->total_ifa_count--;
 787                 LIST_REMOVE(sctp_ifap, next_bucket);
 788                 sctp_remove_ifa_from_ifn(sctp_ifap);
 789         }
 790 #ifdef SCTP_DEBUG
 791         else {
 792                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 793                     ifn_index);
 794                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 795         }
 796 #endif
 797
 798 out_now:
 799         SCTP_IPI_ADDR_WUNLOCK();
 800         if (sctp_ifap) {
 801                 struct sctp_laddr *wi;
 802
 803                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 804                 if (wi == NULL) {
 805                         /*
 806                          * Gak, what can we do? We have lost an address
 807                          * change can you say HOSED?
 808                          */
 809                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 810
 811                         /* Oops, must decrement the count */
 812                         sctp_free_ifa(sctp_ifap);
 813                         return;
 814                 }
 815                 SCTP_INCR_LADDR_COUNT();
 816                 memset(wi, 0, sizeof(*wi));
 817                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 818                 wi->ifa = sctp_ifap;
 819                 wi->action = SCTP_DEL_IP_ADDRESS;
 820                 SCTP_WQ_ADDR_LOCK();
 821                 /*
 822                  * Should this really be a tailq? As it is we will process
 823                  * the newest first :-0
 824                  */
 825                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 826                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 827                     (struct sctp_inpcb *)NULL,
 828                     (struct sctp_tcb *)NULL,
 829                     (struct sctp_nets *)NULL);
 830                 SCTP_WQ_ADDR_UNLOCK();
 831         }
 832         return;
 833 }
 834
 835
 836 static int
 837 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
 838 {
 839         int loopback_scope;
 840 #if defined(INET)
 841         int ipv4_local_scope, ipv4_addr_legal;
 842 #endif
 843 #if defined(INET6)
 844         int local_scope, site_scope, ipv6_addr_legal;
 845 #endif
 846         struct sctp_vrf *vrf;
 847         struct sctp_ifn *sctp_ifn;
 848         struct sctp_ifa *sctp_ifa;
 849
 850         loopback_scope = stcb->asoc.scope.loopback_scope;
 851 #if defined(INET)
 852         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
 853         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
 854 #endif
 855 #if defined(INET6)
 856         local_scope = stcb->asoc.scope.local_scope;
 857         site_scope = stcb->asoc.scope.site_scope;
 858         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
 859 #endif
 860
 861         SCTP_IPI_ADDR_RLOCK();
 862         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
 863         if (vrf == NULL) {
 864                 /* no vrf, no addresses */
 865                 SCTP_IPI_ADDR_RUNLOCK();
 866                 return (0);
 867         }
 868
 869         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 870                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 871                         if ((loopback_scope == 0) &&
 872                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 873                                 continue;
 874                         }
 875                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 876                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
 877                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
 878                                         /*
 879                                          * We allow pending addresses, where
 880                                          * we have sent an asconf-add to be
 881                                          * considered valid.
 882                                          */
 883                                         continue;
 884                                 }
 885                                 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
 886                                         continue;
 887                                 }
 888                                 switch (sctp_ifa->address.sa.sa_family) {
 889 #ifdef INET
 890                                 case AF_INET:
 891                                         if (ipv4_addr_legal) {
 892                                                 struct sockaddr_in *sin,
 893                                                            *rsin;
 894
 895                                                 sin = &sctp_ifa->address.sin;
 896                                                 rsin = (struct sockaddr_in *)to;
 897                                                 if ((ipv4_local_scope == 0) &&
 898                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 899                                                         continue;
 900                                                 }
 901                                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
 902                                                     &sin->sin_addr) != 0) {
 903                                                         continue;
 904                                                 }
 905                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 906                                                         SCTP_IPI_ADDR_RUNLOCK();
 907                                                         return (1);
 908                                                 }
 909                                         }
 910                                         break;
 911 #endif
 912 #ifdef INET6
 913                                 case AF_INET6:
 914                                         if (ipv6_addr_legal) {
 915                                                 struct sockaddr_in6 *sin6,
 916                                                             *rsin6;
 917
 918                                                 sin6 = &sctp_ifa->address.sin6;
 919                                                 rsin6 = (struct sockaddr_in6 *)to;
 920                                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
 921                                                     &sin6->sin6_addr) != 0) {
 922                                                         continue;
 923                                                 }
 924                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 925                                                         if (local_scope == 0)
 926                                                                 continue;
 927                                                         if (sin6->sin6_scope_id == 0) {
 928                                                                 if (sa6_recoverscope(sin6) != 0)
 929                                                                         continue;
 930                                                         }
 931                                                 }
 932                                                 if ((site_scope == 0) &&
 933                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
 934                                                         continue;
 935                                                 }
 936                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 937                                                         SCTP_IPI_ADDR_RUNLOCK();
 938                                                         return (1);
 939                                                 }
 940                                         }
 941                                         break;
 942 #endif
 943                                 default:
 944                                         /* TSNH */
 945                                         break;
 946                                 }
 947                         }
 948                 }
 949         } else {
 950                 struct sctp_laddr *laddr;
 951
 952                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
 953                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 954                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 955                                 continue;
 956                         }
 957                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
 958                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
 959                                 /*
 960                                  * We allow pending addresses, where we have
 961                                  * sent an asconf-add to be considered
 962                                  * valid.
 963                                  */
 964                                 continue;
 965                         }
 966                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
 967                                 continue;
 968                         }
 969                         switch (to->sa_family) {
 970 #ifdef INET
 971                         case AF_INET:
 972                                 {
 973                                         struct sockaddr_in *sin, *rsin;
 974
 975                                         sin = &laddr->ifa->address.sin;
 976                                         rsin = (struct sockaddr_in *)to;
 977                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 978                                                 SCTP_IPI_ADDR_RUNLOCK();
 979                                                 return (1);
 980                                         }
 981                                         break;
 982                                 }
 983 #endif
 984 #ifdef INET6
 985                         case AF_INET6:
 986                                 {
 987                                         struct sockaddr_in6 *sin6, *rsin6;
 988
 989                                         sin6 = &laddr->ifa->address.sin6;
 990                                         rsin6 = (struct sockaddr_in6 *)to;
 991                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 992                                                 SCTP_IPI_ADDR_RUNLOCK();
 993                                                 return (1);
 994                                         }
 995                                         break;
 996                                 }
 997
 998 #endif
 999                         default:
1000                                 /* TSNH */
1001                                 break;
1002                         }
1003
1004                 }
1005         }
1006         SCTP_IPI_ADDR_RUNLOCK();
1007         return (0);
1008 }
1009
1010
1011 static struct sctp_tcb *
1012 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1013     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1014 {
1015         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1016         /*
1017          * If we support the TCP model, then we must now dig through to see
1018          * if we can find our endpoint in the list of tcp ep's.
1019          */
1020         uint16_t lport, rport;
1021         struct sctppcbhead *ephead;
1022         struct sctp_inpcb *inp;
1023         struct sctp_laddr *laddr;
1024         struct sctp_tcb *stcb;
1025         struct sctp_nets *net;
1026
1027         if ((to == NULL) || (from == NULL)) {
1028                 return (NULL);
1029         }
1030
1031         switch (to->sa_family) {
1032 #ifdef INET
1033         case AF_INET:
1034                 if (from->sa_family == AF_INET) {
1035                         lport = ((struct sockaddr_in *)to)->sin_port;
1036                         rport = ((struct sockaddr_in *)from)->sin_port;
1037                 } else {
1038                         return (NULL);
1039                 }
1040                 break;
1041 #endif
1042 #ifdef INET6
1043         case AF_INET6:
1044                 if (from->sa_family == AF_INET6) {
1045                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
1046                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
1047                 } else {
1048                         return (NULL);
1049                 }
1050                 break;
1051 #endif
1052         default:
1053                 return (NULL);
1054         }
1055         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1056         /*
1057          * Ok now for each of the guys in this bucket we must look and see:
1058          * - Does the remote port match. - Does there single association's
1059          * addresses match this address (to). If so we update p_ep to point
1060          * to this ep and return the tcb from it.
1061          */
1062         LIST_FOREACH(inp, ephead, sctp_hash) {
1063                 SCTP_INP_RLOCK(inp);
1064                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1065                         SCTP_INP_RUNLOCK(inp);
1066                         continue;
1067                 }
1068                 if (lport != inp->sctp_lport) {
1069                         SCTP_INP_RUNLOCK(inp);
1070                         continue;
1071                 }
1072                 switch (to->sa_family) {
1073 #ifdef INET
1074                 case AF_INET:
1075                         {
1076                                 struct sockaddr_in *sin;
1077
1078                                 sin = (struct sockaddr_in *)to;
1079                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1080                                     &sin->sin_addr) != 0) {
1081                                         SCTP_INP_RUNLOCK(inp);
1082                                         continue;
1083                                 }
1084                                 break;
1085                         }
1086 #endif
1087 #ifdef INET6
1088                 case AF_INET6:
1089                         {
1090                                 struct sockaddr_in6 *sin6;
1091
1092                                 sin6 = (struct sockaddr_in6 *)to;
1093                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1094                                     &sin6->sin6_addr) != 0) {
1095                                         SCTP_INP_RUNLOCK(inp);
1096                                         continue;
1097                                 }
1098                                 break;
1099                         }
1100 #endif
1101                 default:
1102                         SCTP_INP_RUNLOCK(inp);
1103                         continue;
1104                 }
1105                 if (inp->def_vrf_id != vrf_id) {
1106                         SCTP_INP_RUNLOCK(inp);
1107                         continue;
1108                 }
1109                 /* check to see if the ep has one of the addresses */
1110                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1111                         /* We are NOT bound all, so look further */
1112                         int match = 0;
1113
1114                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1115
1116                                 if (laddr->ifa == NULL) {
1117                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__);
1118                                         continue;
1119                                 }
1120                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1121                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1122                                         continue;
1123                                 }
1124                                 if (laddr->ifa->address.sa.sa_family ==
1125                                     to->sa_family) {
1126                                         /* see if it matches */
1127 #ifdef INET
1128                                         if (from->sa_family == AF_INET) {
1129                                                 struct sockaddr_in *intf_addr,
1130                                                            *sin;
1131
1132                                                 intf_addr = &laddr->ifa->address.sin;
1133                                                 sin = (struct sockaddr_in *)to;
1134                                                 if (sin->sin_addr.s_addr ==
1135                                                     intf_addr->sin_addr.s_addr) {
1136                                                         match = 1;
1137                                                         break;
1138                                                 }
1139                                         }
1140 #endif
1141 #ifdef INET6
1142                                         if (from->sa_family == AF_INET6) {
1143                                                 struct sockaddr_in6 *intf_addr6;
1144                                                 struct sockaddr_in6 *sin6;
1145
1146                                                 sin6 = (struct sockaddr_in6 *)
1147                                                     to;
1148                                                 intf_addr6 = &laddr->ifa->address.sin6;
1149
1150                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1151                                                     intf_addr6)) {
1152                                                         match = 1;
1153                                                         break;
1154                                                 }
1155                                         }
1156 #endif
1157                                 }
1158                         }
1159                         if (match == 0) {
1160                                 /* This endpoint does not have this address */
1161                                 SCTP_INP_RUNLOCK(inp);
1162                                 continue;
1163                         }
1164                 }
1165                 /*
1166                  * Ok if we hit here the ep has the address, does it hold
1167                  * the tcb?
1168                  */
1169                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1170                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1171                 if (stcb == NULL) {
1172                         SCTP_INP_RUNLOCK(inp);
1173                         continue;
1174                 }
1175                 SCTP_TCB_LOCK(stcb);
1176                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1177                         SCTP_TCB_UNLOCK(stcb);
1178                         SCTP_INP_RUNLOCK(inp);
1179                         continue;
1180                 }
1181                 if (stcb->rport != rport) {
1182                         /* remote port does not match. */
1183                         SCTP_TCB_UNLOCK(stcb);
1184                         SCTP_INP_RUNLOCK(inp);
1185                         continue;
1186                 }
1187                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1188                         SCTP_TCB_UNLOCK(stcb);
1189                         SCTP_INP_RUNLOCK(inp);
1190                         continue;
1191                 }
1192                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1193                         SCTP_TCB_UNLOCK(stcb);
1194                         SCTP_INP_RUNLOCK(inp);
1195                         continue;
1196                 }
1197                 /* Does this TCB have a matching address? */
1198                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1199
1200                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1201                                 /* not the same family, can't be a match */
1202                                 continue;
1203                         }
1204                         switch (from->sa_family) {
1205 #ifdef INET
1206                         case AF_INET:
1207                                 {
1208                                         struct sockaddr_in *sin, *rsin;
1209
1210                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
1211                                         rsin = (struct sockaddr_in *)from;
1212                                         if (sin->sin_addr.s_addr ==
1213                                             rsin->sin_addr.s_addr) {
1214                                                 /* found it */
1215                                                 if (netp != NULL) {
1216                                                         *netp = net;
1217                                                 }
1218                                                 /*
1219                                                  * Update the endpoint
1220                                                  * pointer
1221                                                  */
1222                                                 *inp_p = inp;
1223                                                 SCTP_INP_RUNLOCK(inp);
1224                                                 return (stcb);
1225                                         }
1226                                         break;
1227                                 }
1228 #endif
1229 #ifdef INET6
1230                         case AF_INET6:
1231                                 {
1232                                         struct sockaddr_in6 *sin6, *rsin6;
1233
1234                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1235                                         rsin6 = (struct sockaddr_in6 *)from;
1236                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1237                                             rsin6)) {
1238                                                 /* found it */
1239                                                 if (netp != NULL) {
1240                                                         *netp = net;
1241                                                 }
1242                                                 /*
1243                                                  * Update the endpoint
1244                                                  * pointer
1245                                                  */
1246                                                 *inp_p = inp;
1247                                                 SCTP_INP_RUNLOCK(inp);
1248                                                 return (stcb);
1249                                         }
1250                                         break;
1251                                 }
1252 #endif
1253                         default:
1254                                 /* TSNH */
1255                                 break;
1256                         }
1257                 }
1258                 SCTP_TCB_UNLOCK(stcb);
1259                 SCTP_INP_RUNLOCK(inp);
1260         }
1261         return (NULL);
1262 }
1263
1264
1265 /*
1266  * rules for use
1267  *
1268  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1269  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1270  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1271  * NULL.
1272  */
1273
1274 struct sctp_tcb *
1275 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1276     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1277 {
1278         struct sctpasochead *head;
1279         struct sctp_inpcb *inp;
1280         struct sctp_tcb *stcb = NULL;
1281         struct sctp_nets *net;
1282         uint16_t rport;
1283
1284         inp = *inp_p;
1285         switch (remote->sa_family) {
1286 #ifdef INET
1287         case AF_INET:
1288                 rport = (((struct sockaddr_in *)remote)->sin_port);
1289                 break;
1290 #endif
1291 #ifdef INET6
1292         case AF_INET6:
1293                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1294                 break;
1295 #endif
1296         default:
1297                 return (NULL);
1298         }
1299         if (locked_tcb) {
1300                 /*
1301                  * UN-lock so we can do proper locking here this occurs when
1302                  * called from load_addresses_from_init.
1303                  */
1304                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1305                 SCTP_TCB_UNLOCK(locked_tcb);
1306         }
1307         SCTP_INP_INFO_RLOCK();
1308         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1309             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1310                 /*-
1311                  * Now either this guy is our listener or it's the
1312                  * connector. If it is the one that issued the connect, then
1313                  * it's only chance is to be the first TCB in the list. If
1314                  * it is the acceptor, then do the special_lookup to hash
1315                  * and find the real inp.
1316                  */
1317                 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) {
1318                         /* to is peer addr, from is my addr */
1319                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1320                             netp, inp->def_vrf_id);
1321                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1322                                 /* we have a locked tcb, lower refcount */
1323                                 SCTP_INP_DECR_REF(inp);
1324                         }
1325                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1326                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1327                                 SCTP_TCB_LOCK(locked_tcb);
1328                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1329                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1330                         }
1331                         SCTP_INP_INFO_RUNLOCK();
1332                         return (stcb);
1333                 } else {
1334                         SCTP_INP_WLOCK(inp);
1335                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1336                                 goto null_return;
1337                         }
1338                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1339                         if (stcb == NULL) {
1340                                 goto null_return;
1341                         }
1342                         SCTP_TCB_LOCK(stcb);
1343
1344                         if (stcb->rport != rport) {
1345                                 /* remote port does not match. */
1346                                 SCTP_TCB_UNLOCK(stcb);
1347                                 goto null_return;
1348                         }
1349                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1350                                 SCTP_TCB_UNLOCK(stcb);
1351                                 goto null_return;
1352                         }
1353                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1354                                 SCTP_TCB_UNLOCK(stcb);
1355                                 goto null_return;
1356                         }
1357                         /* now look at the list of remote addresses */
1358                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1359 #ifdef INVARIANTS
1360                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1361                                         panic("Corrupt net list");
1362                                 }
1363 #endif
1364                                 if (net->ro._l_addr.sa.sa_family !=
1365                                     remote->sa_family) {
1366                                         /* not the same family */
1367                                         continue;
1368                                 }
1369                                 switch (remote->sa_family) {
1370 #ifdef INET
1371                                 case AF_INET:
1372                                         {
1373                                                 struct sockaddr_in *sin,
1374                                                            *rsin;
1375
1376                                                 sin = (struct sockaddr_in *)
1377                                                     &net->ro._l_addr;
1378                                                 rsin = (struct sockaddr_in *)remote;
1379                                                 if (sin->sin_addr.s_addr ==
1380                                                     rsin->sin_addr.s_addr) {
1381                                                         /* found it */
1382                                                         if (netp != NULL) {
1383                                                                 *netp = net;
1384                                                         }
1385                                                         if (locked_tcb == NULL) {
1386                                                                 SCTP_INP_DECR_REF(inp);
1387                                                         } else if (locked_tcb != stcb) {
1388                                                                 SCTP_TCB_LOCK(locked_tcb);
1389                                                         }
1390                                                         if (locked_tcb) {
1391                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1392                                                         }
1393
1394                                                         SCTP_INP_WUNLOCK(inp);
1395                                                         SCTP_INP_INFO_RUNLOCK();
1396                                                         return (stcb);
1397                                                 }
1398                                                 break;
1399                                         }
1400 #endif
1401 #ifdef INET6
1402                                 case AF_INET6:
1403                                         {
1404                                                 struct sockaddr_in6 *sin6,
1405                                                             *rsin6;
1406
1407                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1408                                                 rsin6 = (struct sockaddr_in6 *)remote;
1409                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1410                                                     rsin6)) {
1411                                                         /* found it */
1412                                                         if (netp != NULL) {
1413                                                                 *netp = net;
1414                                                         }
1415                                                         if (locked_tcb == NULL) {
1416                                                                 SCTP_INP_DECR_REF(inp);
1417                                                         } else if (locked_tcb != stcb) {
1418                                                                 SCTP_TCB_LOCK(locked_tcb);
1419                                                         }
1420                                                         if (locked_tcb) {
1421                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1422                                                         }
1423                                                         SCTP_INP_WUNLOCK(inp);
1424                                                         SCTP_INP_INFO_RUNLOCK();
1425                                                         return (stcb);
1426                                                 }
1427                                                 break;
1428                                         }
1429 #endif
1430                                 default:
1431                                         /* TSNH */
1432                                         break;
1433                                 }
1434                         }
1435                         SCTP_TCB_UNLOCK(stcb);
1436                 }
1437         } else {
1438                 SCTP_INP_WLOCK(inp);
1439                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1440                         goto null_return;
1441                 }
1442                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1443                     inp->sctp_hashmark)];
1444                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1445                         if (stcb->rport != rport) {
1446                                 /* remote port does not match */
1447                                 continue;
1448                         }
1449                         SCTP_TCB_LOCK(stcb);
1450                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1451                                 SCTP_TCB_UNLOCK(stcb);
1452                                 continue;
1453                         }
1454                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1455                                 SCTP_TCB_UNLOCK(stcb);
1456                                 continue;
1457                         }
1458                         /* now look at the list of remote addresses */
1459                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1460 #ifdef INVARIANTS
1461                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1462                                         panic("Corrupt net list");
1463                                 }
1464 #endif
1465                                 if (net->ro._l_addr.sa.sa_family !=
1466                                     remote->sa_family) {
1467                                         /* not the same family */
1468                                         continue;
1469                                 }
1470                                 switch (remote->sa_family) {
1471 #ifdef INET
1472                                 case AF_INET:
1473                                         {
1474                                                 struct sockaddr_in *sin,
1475                                                            *rsin;
1476
1477                                                 sin = (struct sockaddr_in *)
1478                                                     &net->ro._l_addr;
1479                                                 rsin = (struct sockaddr_in *)remote;
1480                                                 if (sin->sin_addr.s_addr ==
1481                                                     rsin->sin_addr.s_addr) {
1482                                                         /* found it */
1483                                                         if (netp != NULL) {
1484                                                                 *netp = net;
1485                                                         }
1486                                                         if (locked_tcb == NULL) {
1487                                                                 SCTP_INP_DECR_REF(inp);
1488                                                         } else if (locked_tcb != stcb) {
1489                                                                 SCTP_TCB_LOCK(locked_tcb);
1490                                                         }
1491                                                         if (locked_tcb) {
1492                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1493                                                         }
1494                                                         SCTP_INP_WUNLOCK(inp);
1495                                                         SCTP_INP_INFO_RUNLOCK();
1496                                                         return (stcb);
1497                                                 }
1498                                                 break;
1499                                         }
1500 #endif
1501 #ifdef INET6
1502                                 case AF_INET6:
1503                                         {
1504                                                 struct sockaddr_in6 *sin6,
1505                                                             *rsin6;
1506
1507                                                 sin6 = (struct sockaddr_in6 *)
1508                                                     &net->ro._l_addr;
1509                                                 rsin6 = (struct sockaddr_in6 *)remote;
1510                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1511                                                     rsin6)) {
1512                                                         /* found it */
1513                                                         if (netp != NULL) {
1514                                                                 *netp = net;
1515                                                         }
1516                                                         if (locked_tcb == NULL) {
1517                                                                 SCTP_INP_DECR_REF(inp);
1518                                                         } else if (locked_tcb != stcb) {
1519                                                                 SCTP_TCB_LOCK(locked_tcb);
1520                                                         }
1521                                                         if (locked_tcb) {
1522                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1523                                                         }
1524                                                         SCTP_INP_WUNLOCK(inp);
1525                                                         SCTP_INP_INFO_RUNLOCK();
1526                                                         return (stcb);
1527                                                 }
1528                                                 break;
1529                                         }
1530 #endif
1531                                 default:
1532                                         /* TSNH */
1533                                         break;
1534                                 }
1535                         }
1536                         SCTP_TCB_UNLOCK(stcb);
1537                 }
1538         }
1539 null_return:
1540         /* clean up for returning null */
1541         if (locked_tcb) {
1542                 SCTP_TCB_LOCK(locked_tcb);
1543                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1544         }
1545         SCTP_INP_WUNLOCK(inp);
1546         SCTP_INP_INFO_RUNLOCK();
1547         /* not found */
1548         return (NULL);
1549 }
1550
1551
1552 /*
1553  * Find an association for a specific endpoint using the association id given
1554  * out in the COMM_UP notification
1555  */
1556 struct sctp_tcb *
1557 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1558 {
1559         /*
1560          * Use my the assoc_id to find a endpoint
1561          */
1562         struct sctpasochead *head;
1563         struct sctp_tcb *stcb;
1564         uint32_t id;
1565
1566         if (inp == NULL) {
1567                 SCTP_PRINTF("TSNH ep_associd\n");
1568                 return (NULL);
1569         }
1570         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1571                 SCTP_PRINTF("TSNH ep_associd0\n");
1572                 return (NULL);
1573         }
1574         id = (uint32_t)asoc_id;
1575         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1576         if (head == NULL) {
1577                 /* invalid id TSNH */
1578                 SCTP_PRINTF("TSNH ep_associd1\n");
1579                 return (NULL);
1580         }
1581         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1582                 if (stcb->asoc.assoc_id == id) {
1583                         if (inp != stcb->sctp_ep) {
1584                                 /*
1585                                  * some other guy has the same id active (id
1586                                  * collision ??).
1587                                  */
1588                                 SCTP_PRINTF("TSNH ep_associd2\n");
1589                                 continue;
1590                         }
1591                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1592                                 continue;
1593                         }
1594                         if (want_lock) {
1595                                 SCTP_TCB_LOCK(stcb);
1596                         }
1597                         return (stcb);
1598                 }
1599         }
1600         return (NULL);
1601 }
1602
1603
1604 struct sctp_tcb *
1605 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1606 {
1607         struct sctp_tcb *stcb;
1608
1609         SCTP_INP_RLOCK(inp);
1610         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1611         SCTP_INP_RUNLOCK(inp);
1612         return (stcb);
1613 }
1614
1615
1616 /*
1617  * Endpoint probe expects that the INP_INFO is locked.
1618  */
1619 static struct sctp_inpcb *
1620 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1621     uint16_t lport, uint32_t vrf_id)
1622 {
1623         struct sctp_inpcb *inp;
1624         struct sctp_laddr *laddr;
1625 #ifdef INET
1626         struct sockaddr_in *sin;
1627 #endif
1628 #ifdef INET6
1629         struct sockaddr_in6 *sin6;
1630         struct sockaddr_in6 *intf_addr6;
1631 #endif
1632         int fnd;
1633
1634 #ifdef INET
1635         sin = NULL;
1636 #endif
1637 #ifdef INET6
1638         sin6 = NULL;
1639 #endif
1640         switch (nam->sa_family) {
1641 #ifdef INET
1642         case AF_INET:
1643                 sin = (struct sockaddr_in *)nam;
1644                 break;
1645 #endif
1646 #ifdef INET6
1647         case AF_INET6:
1648                 sin6 = (struct sockaddr_in6 *)nam;
1649                 break;
1650 #endif
1651         default:
1652                 /* unsupported family */
1653                 return (NULL);
1654         }
1655
1656         if (head == NULL)
1657                 return (NULL);
1658
1659         LIST_FOREACH(inp, head, sctp_hash) {
1660                 SCTP_INP_RLOCK(inp);
1661                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1662                         SCTP_INP_RUNLOCK(inp);
1663                         continue;
1664                 }
1665                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1666                     (inp->sctp_lport == lport)) {
1667                         /* got it */
1668                         switch (nam->sa_family) {
1669 #ifdef INET
1670                         case AF_INET:
1671                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1672                                     SCTP_IPV6_V6ONLY(inp)) {
1673                                         /*
1674                                          * IPv4 on a IPv6 socket with ONLY
1675                                          * IPv6 set
1676                                          */
1677                                         SCTP_INP_RUNLOCK(inp);
1678                                         continue;
1679                                 }
1680                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1681                                     &sin->sin_addr) != 0) {
1682                                         SCTP_INP_RUNLOCK(inp);
1683                                         continue;
1684                                 }
1685                                 break;
1686 #endif
1687 #ifdef INET6
1688                         case AF_INET6:
1689                                 /*
1690                                  * A V6 address and the endpoint is NOT
1691                                  * bound V6
1692                                  */
1693                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1694                                         SCTP_INP_RUNLOCK(inp);
1695                                         continue;
1696                                 }
1697                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1698                                     &sin6->sin6_addr) != 0) {
1699                                         SCTP_INP_RUNLOCK(inp);
1700                                         continue;
1701                                 }
1702                                 break;
1703 #endif
1704                         default:
1705                                 break;
1706                         }
1707                         /* does a VRF id match? */
1708                         fnd = 0;
1709                         if (inp->def_vrf_id == vrf_id)
1710                                 fnd = 1;
1711
1712                         SCTP_INP_RUNLOCK(inp);
1713                         if (!fnd)
1714                                 continue;
1715                         return (inp);
1716                 }
1717                 SCTP_INP_RUNLOCK(inp);
1718         }
1719         switch (nam->sa_family) {
1720 #ifdef INET
1721         case AF_INET:
1722                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1723                         /* Can't hunt for one that has no address specified */
1724                         return (NULL);
1725                 }
1726                 break;
1727 #endif
1728 #ifdef INET6
1729         case AF_INET6:
1730                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1731                         /* Can't hunt for one that has no address specified */
1732                         return (NULL);
1733                 }
1734                 break;
1735 #endif
1736         default:
1737                 break;
1738         }
1739         /*
1740          * ok, not bound to all so see if we can find a EP bound to this
1741          * address.
1742          */
1743         LIST_FOREACH(inp, head, sctp_hash) {
1744                 SCTP_INP_RLOCK(inp);
1745                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1746                         SCTP_INP_RUNLOCK(inp);
1747                         continue;
1748                 }
1749                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1750                         SCTP_INP_RUNLOCK(inp);
1751                         continue;
1752                 }
1753                 /*
1754                  * Ok this could be a likely candidate, look at all of its
1755                  * addresses
1756                  */
1757                 if (inp->sctp_lport != lport) {
1758                         SCTP_INP_RUNLOCK(inp);
1759                         continue;
1760                 }
1761                 /* does a VRF id match? */
1762                 fnd = 0;
1763                 if (inp->def_vrf_id == vrf_id)
1764                         fnd = 1;
1765
1766                 if (!fnd) {
1767                         SCTP_INP_RUNLOCK(inp);
1768                         continue;
1769                 }
1770                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1771                         if (laddr->ifa == NULL) {
1772                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1773                                     __func__);
1774                                 continue;
1775                         }
1776                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1777                             (void *)laddr->ifa);
1778                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1779                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1780                                 continue;
1781                         }
1782                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1783                                 /* possible, see if it matches */
1784                                 switch (nam->sa_family) {
1785 #ifdef INET
1786                                 case AF_INET:
1787                                         if (sin->sin_addr.s_addr ==
1788                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1789                                                 SCTP_INP_RUNLOCK(inp);
1790                                                 return (inp);
1791                                         }
1792                                         break;
1793 #endif
1794 #ifdef INET6
1795                                 case AF_INET6:
1796                                         intf_addr6 = &laddr->ifa->address.sin6;
1797                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1798                                             intf_addr6)) {
1799                                                 SCTP_INP_RUNLOCK(inp);
1800                                                 return (inp);
1801                                         }
1802                                         break;
1803 #endif
1804                                 }
1805                         }
1806                 }
1807                 SCTP_INP_RUNLOCK(inp);
1808         }
1809         return (NULL);
1810 }
1811
1812
1813 static struct sctp_inpcb *
1814 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1815 {
1816         struct sctppcbhead *head;
1817         struct sctp_inpcb *t_inp;
1818         int fnd;
1819
1820         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1821             SCTP_BASE_INFO(hashmark))];
1822         LIST_FOREACH(t_inp, head, sctp_hash) {
1823                 if (t_inp->sctp_lport != lport) {
1824                         continue;
1825                 }
1826                 /* is it in the VRF in question */
1827                 fnd = 0;
1828                 if (t_inp->def_vrf_id == vrf_id)
1829                         fnd = 1;
1830                 if (!fnd)
1831                         continue;
1832
1833                 /* This one is in use. */
1834                 /* check the v6/v4 binding issue */
1835                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1836                     SCTP_IPV6_V6ONLY(t_inp)) {
1837                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1838                                 /* collision in V6 space */
1839                                 return (t_inp);
1840                         } else {
1841                                 /* inp is BOUND_V4 no conflict */
1842                                 continue;
1843                         }
1844                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1845                         /* t_inp is bound v4 and v6, conflict always */
1846                         return (t_inp);
1847                 } else {
1848                         /* t_inp is bound only V4 */
1849                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1850                             SCTP_IPV6_V6ONLY(inp)) {
1851                                 /* no conflict */
1852                                 continue;
1853                         }
1854                         /* else fall through to conflict */
1855                 }
1856                 return (t_inp);
1857         }
1858         return (NULL);
1859 }
1860
1861
1862 int
1863 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1864 {
1865         /* For 1-2-1 with port reuse */
1866         struct sctppcbhead *head;
1867         struct sctp_inpcb *tinp, *ninp;
1868
1869         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1870                 /* only works with port reuse on */
1871                 return (-1);
1872         }
1873         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1874                 return (0);
1875         }
1876         SCTP_INP_RUNLOCK(inp);
1877         SCTP_INP_INFO_WLOCK();
1878         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1879             SCTP_BASE_INFO(hashmark))];
1880         /* Kick out all non-listeners to the TCP hash */
1881         LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1882                 if (tinp->sctp_lport != inp->sctp_lport) {
1883                         continue;
1884                 }
1885                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1886                         continue;
1887                 }
1888                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1889                         continue;
1890                 }
1891                 if (SCTP_IS_LISTENING(tinp)) {
1892                         continue;
1893                 }
1894                 SCTP_INP_WLOCK(tinp);
1895                 LIST_REMOVE(tinp, sctp_hash);
1896                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1897                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1898                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1899                 SCTP_INP_WUNLOCK(tinp);
1900         }
1901         SCTP_INP_WLOCK(inp);
1902         /* Pull from where he was */
1903         LIST_REMOVE(inp, sctp_hash);
1904         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1905         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1906         LIST_INSERT_HEAD(head, inp, sctp_hash);
1907         SCTP_INP_WUNLOCK(inp);
1908         SCTP_INP_RLOCK(inp);
1909         SCTP_INP_INFO_WUNLOCK();
1910         return (0);
1911 }
1912
1913
1914 struct sctp_inpcb *
1915 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1916     uint32_t vrf_id)
1917 {
1918         /*
1919          * First we check the hash table to see if someone has this port
1920          * bound with just the port.
1921          */
1922         struct sctp_inpcb *inp;
1923         struct sctppcbhead *head;
1924         int lport;
1925         unsigned int i;
1926 #ifdef INET
1927         struct sockaddr_in *sin;
1928 #endif
1929 #ifdef INET6
1930         struct sockaddr_in6 *sin6;
1931 #endif
1932
1933         switch (nam->sa_family) {
1934 #ifdef INET
1935         case AF_INET:
1936                 sin = (struct sockaddr_in *)nam;
1937                 lport = sin->sin_port;
1938                 break;
1939 #endif
1940 #ifdef INET6
1941         case AF_INET6:
1942                 sin6 = (struct sockaddr_in6 *)nam;
1943                 lport = sin6->sin6_port;
1944                 break;
1945 #endif
1946         default:
1947                 return (NULL);
1948         }
1949         /*
1950          * I could cheat here and just cast to one of the types but we will
1951          * do it right. It also provides the check against an Unsupported
1952          * type too.
1953          */
1954         /* Find the head of the ALLADDR chain */
1955         if (have_lock == 0) {
1956                 SCTP_INP_INFO_RLOCK();
1957         }
1958         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1959             SCTP_BASE_INFO(hashmark))];
1960         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1961
1962         /*
1963          * If the TCP model exists it could be that the main listening
1964          * endpoint is gone but there still exists a connected socket for
1965          * this guy. If so we can return the first one that we find. This
1966          * may NOT be the correct one so the caller should be wary on the
1967          * returned INP. Currently the only caller that sets find_tcp_pool
1968          * is in bindx where we are verifying that a user CAN bind the
1969          * address. He either has bound it already, or someone else has, or
1970          * its open to bind, so this is good enough.
1971          */
1972         if (inp == NULL && find_tcp_pool) {
1973                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1974                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1975                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1976                         if (inp) {
1977                                 break;
1978                         }
1979                 }
1980         }
1981         if (inp) {
1982                 SCTP_INP_INCR_REF(inp);
1983         }
1984         if (have_lock == 0) {
1985                 SCTP_INP_INFO_RUNLOCK();
1986         }
1987         return (inp);
1988 }
1989
1990
1991 /*
1992  * Find an association for an endpoint with the pointer to whom you want to
1993  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1994  * need to change the *to to some other struct like a mbuf...
1995  */
1996 struct sctp_tcb *
1997 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
1998     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1999     uint32_t vrf_id)
2000 {
2001         struct sctp_inpcb *inp = NULL;
2002         struct sctp_tcb *stcb;
2003
2004         SCTP_INP_INFO_RLOCK();
2005         if (find_tcp_pool) {
2006                 if (inp_p != NULL) {
2007                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2008                             vrf_id);
2009                 } else {
2010                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2011                             vrf_id);
2012                 }
2013                 if (stcb != NULL) {
2014                         SCTP_INP_INFO_RUNLOCK();
2015                         return (stcb);
2016                 }
2017         }
2018         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2019         if (inp_p != NULL) {
2020                 *inp_p = inp;
2021         }
2022         SCTP_INP_INFO_RUNLOCK();
2023         if (inp == NULL) {
2024                 return (NULL);
2025         }
2026         /*
2027          * ok, we have an endpoint, now lets find the assoc for it (if any)
2028          * we now place the source address or from in the to of the find
2029          * endpoint call. Since in reality this chain is used from the
2030          * inbound packet side.
2031          */
2032         if (inp_p != NULL) {
2033                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2034                     NULL);
2035         } else {
2036                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2037                     NULL);
2038         }
2039         return (stcb);
2040 }
2041
2042
2043 /*
2044  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2045  * find all addresses that the sender has specified in any address list. Each
2046  * address will be used to lookup the TCB and see if one exits.
2047  */
2048 static struct sctp_tcb *
2049 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2050     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2051     struct sockaddr *dst)
2052 {
2053         struct sctp_paramhdr *phdr, param_buf;
2054 #if defined(INET) || defined(INET6)
2055         struct sctp_tcb *stcb;
2056         uint16_t ptype;
2057 #endif
2058         uint16_t plen;
2059 #ifdef INET
2060         struct sockaddr_in sin4;
2061 #endif
2062 #ifdef INET6
2063         struct sockaddr_in6 sin6;
2064 #endif
2065
2066 #ifdef INET
2067         memset(&sin4, 0, sizeof(sin4));
2068         sin4.sin_len = sizeof(sin4);
2069         sin4.sin_family = AF_INET;
2070         sin4.sin_port = sh->src_port;
2071 #endif
2072 #ifdef INET6
2073         memset(&sin6, 0, sizeof(sin6));
2074         sin6.sin6_len = sizeof(sin6);
2075         sin6.sin6_family = AF_INET6;
2076         sin6.sin6_port = sh->src_port;
2077 #endif
2078
2079         offset += sizeof(struct sctp_init_chunk);
2080
2081         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
2082         while (phdr != NULL) {
2083                 /* now we must see if we want the parameter */
2084 #if defined(INET) || defined(INET6)
2085                 ptype = ntohs(phdr->param_type);
2086 #endif
2087                 plen = ntohs(phdr->param_length);
2088                 if (plen == 0) {
2089                         break;
2090                 }
2091 #ifdef INET
2092                 if (ptype == SCTP_IPV4_ADDRESS &&
2093                     plen == sizeof(struct sctp_ipv4addr_param)) {
2094                         /* Get the rest of the address */
2095                         struct sctp_ipv4addr_param ip4_param, *p4;
2096
2097                         phdr = sctp_get_next_param(m, offset,
2098                             (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param));
2099                         if (phdr == NULL) {
2100                                 return (NULL);
2101                         }
2102                         p4 = (struct sctp_ipv4addr_param *)phdr;
2103                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2104                         /* look it up */
2105                         stcb = sctp_findassociation_ep_addr(inp_p,
2106                             (struct sockaddr *)&sin4, netp, dst, NULL);
2107                         if (stcb != NULL) {
2108                                 return (stcb);
2109                         }
2110                 }
2111 #endif
2112 #ifdef INET6
2113                 if (ptype == SCTP_IPV6_ADDRESS &&
2114                     plen == sizeof(struct sctp_ipv6addr_param)) {
2115                         /* Get the rest of the address */
2116                         struct sctp_ipv6addr_param ip6_param, *p6;
2117
2118                         phdr = sctp_get_next_param(m, offset,
2119                             (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param));
2120                         if (phdr == NULL) {
2121                                 return (NULL);
2122                         }
2123                         p6 = (struct sctp_ipv6addr_param *)phdr;
2124                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2125                         /* look it up */
2126                         stcb = sctp_findassociation_ep_addr(inp_p,
2127                             (struct sockaddr *)&sin6, netp, dst, NULL);
2128                         if (stcb != NULL) {
2129                                 return (stcb);
2130                         }
2131                 }
2132 #endif
2133                 offset += SCTP_SIZE32(plen);
2134                 phdr = sctp_get_next_param(m, offset, &param_buf,
2135                     sizeof(param_buf));
2136         }
2137         return (NULL);
2138 }
2139
2140 static struct sctp_tcb *
2141 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2142     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2143     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2144 {
2145         /*
2146          * Use my vtag to hash. If we find it we then verify the source addr
2147          * is in the assoc. If all goes well we save a bit on rec of a
2148          * packet.
2149          */
2150         struct sctpasochead *head;
2151         struct sctp_nets *net;
2152         struct sctp_tcb *stcb;
2153
2154         SCTP_INP_INFO_RLOCK();
2155         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2156             SCTP_BASE_INFO(hashasocmark))];
2157         LIST_FOREACH(stcb, head, sctp_asocs) {
2158                 SCTP_INP_RLOCK(stcb->sctp_ep);
2159                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2160                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2161                         continue;
2162                 }
2163                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2164                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2165                         continue;
2166                 }
2167                 SCTP_TCB_LOCK(stcb);
2168                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2169                 if (stcb->asoc.my_vtag == vtag) {
2170                         /* candidate */
2171                         if (stcb->rport != rport) {
2172                                 SCTP_TCB_UNLOCK(stcb);
2173                                 continue;
2174                         }
2175                         if (stcb->sctp_ep->sctp_lport != lport) {
2176                                 SCTP_TCB_UNLOCK(stcb);
2177                                 continue;
2178                         }
2179                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2180                                 SCTP_TCB_UNLOCK(stcb);
2181                                 continue;
2182                         }
2183                         /* RRS:Need toaddr check here */
2184                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2185                                 /* Endpoint does not own this address */
2186                                 SCTP_TCB_UNLOCK(stcb);
2187                                 continue;
2188                         }
2189                         if (remote_tag) {
2190                                 /*
2191                                  * If we have both vtags that's all we match
2192                                  * on
2193                                  */
2194                                 if (stcb->asoc.peer_vtag == remote_tag) {
2195                                         /*
2196                                          * If both tags match we consider it
2197                                          * conclusive and check NO
2198                                          * source/destination addresses
2199                                          */
2200                                         goto conclusive;
2201                                 }
2202                         }
2203                         if (skip_src_check) {
2204                 conclusive:
2205                                 if (from) {
2206                                         *netp = sctp_findnet(stcb, from);
2207                                 } else {
2208                                         *netp = NULL;   /* unknown */
2209                                 }
2210                                 if (inp_p)
2211                                         *inp_p = stcb->sctp_ep;
2212                                 SCTP_INP_INFO_RUNLOCK();
2213                                 return (stcb);
2214                         }
2215                         net = sctp_findnet(stcb, from);
2216                         if (net) {
2217                                 /* yep its him. */
2218                                 *netp = net;
2219                                 SCTP_STAT_INCR(sctps_vtagexpress);
2220                                 *inp_p = stcb->sctp_ep;
2221                                 SCTP_INP_INFO_RUNLOCK();
2222                                 return (stcb);
2223                         } else {
2224                                 /*
2225                                  * not him, this should only happen in rare
2226                                  * cases so I peg it.
2227                                  */
2228                                 SCTP_STAT_INCR(sctps_vtagbogus);
2229                         }
2230                 }
2231                 SCTP_TCB_UNLOCK(stcb);
2232         }
2233         SCTP_INP_INFO_RUNLOCK();
2234         return (NULL);
2235 }
2236
2237
2238 /*
2239  * Find an association with the pointer to the inbound IP packet. This can be
2240  * a IPv4 or IPv6 packet.
2241  */
2242 struct sctp_tcb *
2243 sctp_findassociation_addr(struct mbuf *m, int offset,
2244     struct sockaddr *src, struct sockaddr *dst,
2245     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2246     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2247 {
2248         struct sctp_tcb *stcb;
2249         struct sctp_inpcb *inp;
2250
2251         if (sh->v_tag) {
2252                 /* we only go down this path if vtag is non-zero */
2253                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2254                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2255                 if (stcb) {
2256                         return (stcb);
2257                 }
2258         }
2259
2260         if (inp_p) {
2261                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2262                     1, vrf_id);
2263                 inp = *inp_p;
2264         } else {
2265                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2266                     1, vrf_id);
2267         }
2268         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2269         if (stcb == NULL && inp) {
2270                 /* Found a EP but not this address */
2271                 if ((ch->chunk_type == SCTP_INITIATION) ||
2272                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2273                         /*-
2274                          * special hook, we do NOT return linp or an
2275                          * association that is linked to an existing
2276                          * association that is under the TCP pool (i.e. no
2277                          * listener exists). The endpoint finding routine
2278                          * will always find a listener before examining the
2279                          * TCP pool.
2280                          */
2281                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2282                                 if (inp_p) {
2283                                         *inp_p = NULL;
2284                                 }
2285                                 return (NULL);
2286                         }
2287                         stcb = sctp_findassociation_special_addr(m,
2288                             offset, sh, &inp, netp, dst);
2289                         if (inp_p != NULL) {
2290                                 *inp_p = inp;
2291                         }
2292                 }
2293         }
2294         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2295         return (stcb);
2296 }
2297
2298 /*
2299  * lookup an association by an ASCONF lookup address.
2300  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2301  */
2302 struct sctp_tcb *
2303 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2304     struct sockaddr *dst, struct sctphdr *sh,
2305     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2306 {
2307         struct sctp_tcb *stcb;
2308         union sctp_sockstore remote_store;
2309         struct sctp_paramhdr param_buf, *phdr;
2310         int ptype;
2311         int zero_address = 0;
2312 #ifdef INET
2313         struct sockaddr_in *sin;
2314 #endif
2315 #ifdef INET6
2316         struct sockaddr_in6 *sin6;
2317 #endif
2318
2319         memset(&remote_store, 0, sizeof(remote_store));
2320         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2321             &param_buf, sizeof(struct sctp_paramhdr));
2322         if (phdr == NULL) {
2323                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2324                     __func__);
2325                 return NULL;
2326         }
2327         ptype = (int)((uint32_t)ntohs(phdr->param_type));
2328         /* get the correlation address */
2329         switch (ptype) {
2330 #ifdef INET6
2331         case SCTP_IPV6_ADDRESS:
2332                 {
2333                         /* ipv6 address param */
2334                         struct sctp_ipv6addr_param *p6, p6_buf;
2335
2336                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2337                                 return NULL;
2338                         }
2339                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2340                             offset + sizeof(struct sctp_asconf_chunk),
2341                             &p6_buf.ph, sizeof(p6_buf));
2342                         if (p6 == NULL) {
2343                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2344                                     __func__);
2345                                 return (NULL);
2346                         }
2347                         sin6 = &remote_store.sin6;
2348                         sin6->sin6_family = AF_INET6;
2349                         sin6->sin6_len = sizeof(*sin6);
2350                         sin6->sin6_port = sh->src_port;
2351                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2352                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2353                                 zero_address = 1;
2354                         break;
2355                 }
2356 #endif
2357 #ifdef INET
2358         case SCTP_IPV4_ADDRESS:
2359                 {
2360                         /* ipv4 address param */
2361                         struct sctp_ipv4addr_param *p4, p4_buf;
2362
2363                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2364                                 return NULL;
2365                         }
2366                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2367                             offset + sizeof(struct sctp_asconf_chunk),
2368                             &p4_buf.ph, sizeof(p4_buf));
2369                         if (p4 == NULL) {
2370                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2371                                     __func__);
2372                                 return (NULL);
2373                         }
2374                         sin = &remote_store.sin;
2375                         sin->sin_family = AF_INET;
2376                         sin->sin_len = sizeof(*sin);
2377                         sin->sin_port = sh->src_port;
2378                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2379                         if (sin->sin_addr.s_addr == INADDR_ANY)
2380                                 zero_address = 1;
2381                         break;
2382                 }
2383 #endif
2384         default:
2385                 /* invalid address param type */
2386                 return NULL;
2387         }
2388
2389         if (zero_address) {
2390                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2391                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2392                 if (stcb != NULL) {
2393                         SCTP_INP_DECR_REF(*inp_p);
2394                 }
2395         } else {
2396                 stcb = sctp_findassociation_ep_addr(inp_p,
2397                     &remote_store.sa, netp,
2398                     dst, NULL);
2399         }
2400         return (stcb);
2401 }
2402
2403
2404 /*
2405  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2406  * addresses. This way if we don't get a bind we by default pick a ephemeral
2407  * port with all addresses bound.
2408  */
2409 int
2410 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2411 {
2412         /*
2413          * we get called when a new endpoint starts up. We need to allocate
2414          * the sctp_inpcb structure from the zone and init it. Mark it as
2415          * unbound and find a port that we can use as an ephemeral with
2416          * INADDR_ANY. If the user binds later no problem we can then add in
2417          * the specific addresses. And setup the default parameters for the
2418          * EP.
2419          */
2420         int i, error;
2421         struct sctp_inpcb *inp;
2422         struct sctp_pcb *m;
2423         struct timeval time;
2424         sctp_sharedkey_t *null_key;
2425
2426         error = 0;
2427
2428         SCTP_INP_INFO_WLOCK();
2429         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2430         if (inp == NULL) {
2431                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2432                 SCTP_INP_INFO_WUNLOCK();
2433                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2434                 return (ENOBUFS);
2435         }
2436         /* zap it */
2437         memset(inp, 0, sizeof(*inp));
2438
2439         /* bump generations */
2440         /* setup socket pointers */
2441         inp->sctp_socket = so;
2442         inp->ip_inp.inp.inp_socket = so;
2443         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2444 #ifdef INET6
2445         if (INP_SOCKAF(so) == AF_INET6) {
2446                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2447                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2448                 }
2449                 if (MODULE_GLOBAL(ip6_v6only)) {
2450                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2451                 }
2452         }
2453 #endif
2454         inp->sctp_associd_counter = 1;
2455         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2456         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2457         inp->max_cwnd = 0;
2458         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2459         inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable);
2460         inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable);
2461         inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable);
2462         inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable);
2463         inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2464         inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2465         inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2466         inp->idata_supported = 0;
2467
2468         inp->fibnum = so->so_fibnum;
2469         /* init the small hash table we use to track asocid <-> tcb */
2470         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2471         if (inp->sctp_asocidhash == NULL) {
2472                 crfree(inp->ip_inp.inp.inp_cred);
2473                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2474                 SCTP_INP_INFO_WUNLOCK();
2475                 return (ENOBUFS);
2476         }
2477         SCTP_INCR_EP_COUNT();
2478         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2479         SCTP_INP_INFO_WUNLOCK();
2480
2481         so->so_pcb = (caddr_t)inp;
2482
2483         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2484                 /* UDP style socket */
2485                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2486                     SCTP_PCB_FLAGS_UNBOUND);
2487                 /* Be sure it is NON-BLOCKING IO for UDP */
2488                 /* SCTP_SET_SO_NBIO(so); */
2489         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2490                 /* TCP style socket */
2491                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2492                     SCTP_PCB_FLAGS_UNBOUND);
2493                 /* Be sure we have blocking IO by default */
2494                 SOCK_LOCK(so);
2495                 SCTP_CLEAR_SO_NBIO(so);
2496                 SOCK_UNLOCK(so);
2497         } else {
2498                 /*
2499                  * unsupported socket type (RAW, etc)- in case we missed it
2500                  * in protosw
2501                  */
2502                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2503                 so->so_pcb = NULL;
2504                 crfree(inp->ip_inp.inp.inp_cred);
2505                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2506                 return (EOPNOTSUPP);
2507         }
2508         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2509                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2510                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2511         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2512                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2513                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2514         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2515                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2516                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2517         }
2518         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2519             &inp->sctp_hashmark);
2520         if (inp->sctp_tcbhash == NULL) {
2521                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2522                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2523                 so->so_pcb = NULL;
2524                 crfree(inp->ip_inp.inp.inp_cred);
2525                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2526                 return (ENOBUFS);
2527         }
2528         inp->def_vrf_id = vrf_id;
2529
2530         SCTP_INP_INFO_WLOCK();
2531         SCTP_INP_LOCK_INIT(inp);
2532         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2533         SCTP_INP_READ_INIT(inp);
2534         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2535         /* lock the new ep */
2536         SCTP_INP_WLOCK(inp);
2537
2538         /* add it to the info area */
2539         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2540         SCTP_INP_INFO_WUNLOCK();
2541
2542         TAILQ_INIT(&inp->read_queue);
2543         LIST_INIT(&inp->sctp_addr_list);
2544
2545         LIST_INIT(&inp->sctp_asoc_list);
2546
2547 #ifdef SCTP_TRACK_FREED_ASOCS
2548         /* TEMP CODE */
2549         LIST_INIT(&inp->sctp_asoc_free_list);
2550 #endif
2551         /* Init the timer structure for signature change */
2552         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2553         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2554
2555         /* now init the actual endpoint default data */
2556         m = &inp->sctp_ep;
2557
2558         /* setup the base timeout information */
2559         m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC);      /* needed ? */
2560         m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC);      /* needed ? */
2561         m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2562         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2563         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2564         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2565         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2566         /* all max/min max are in ms */
2567         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2568         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2569         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2570         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2571         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2572         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2573         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2574         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2575         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2576         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2577         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2578         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2579         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2580
2581         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2582         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2583         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2584         /* number of streams to pre-open on a association */
2585         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2586
2587         m->default_mtu = 0;
2588         /* Add adaptation cookie */
2589         m->adaptation_layer_indicator = 0;
2590         m->adaptation_layer_indicator_provided = 0;
2591
2592         /* seed random number generator */
2593         m->random_counter = 1;
2594         m->store_at = SCTP_SIGNATURE_SIZE;
2595         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2596         sctp_fill_random_store(m);
2597
2598         /* Minimum cookie size */
2599         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2600             sizeof(struct sctp_state_cookie);
2601         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2602
2603         /* Setup the initial secret */
2604         (void)SCTP_GETTIME_TIMEVAL(&time);
2605         m->time_of_secret_change = time.tv_sec;
2606
2607         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2608                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2609         }
2610         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2611
2612         /* How long is a cookie good for ? */
2613         m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2614         /*
2615          * Initialize authentication parameters
2616          */
2617         m->local_hmacs = sctp_default_supported_hmaclist();
2618         m->local_auth_chunks = sctp_alloc_chunklist();
2619         if (inp->asconf_supported) {
2620                 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2621                 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2622         }
2623         m->default_dscp = 0;
2624 #ifdef INET6
2625         m->default_flowlabel = 0;
2626 #endif
2627         m->port = 0;            /* encapsulation disabled by default */
2628         LIST_INIT(&m->shared_keys);
2629         /* add default NULL key as key id 0 */
2630         null_key = sctp_alloc_sharedkey();
2631         sctp_insert_sharedkey(&m->shared_keys, null_key);
2632         SCTP_INP_WUNLOCK(inp);
2633 #ifdef SCTP_LOG_CLOSING
2634         sctp_log_closing(inp, NULL, 12);
2635 #endif
2636         return (error);
2637 }
2638
2639
2640 void
2641 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2642     struct sctp_tcb *stcb)
2643 {
2644         struct sctp_nets *net;
2645         uint16_t lport, rport;
2646         struct sctppcbhead *head;
2647         struct sctp_laddr *laddr, *oladdr;
2648
2649         atomic_add_int(&stcb->asoc.refcnt, 1);
2650         SCTP_TCB_UNLOCK(stcb);
2651         SCTP_INP_INFO_WLOCK();
2652         SCTP_INP_WLOCK(old_inp);
2653         SCTP_INP_WLOCK(new_inp);
2654         SCTP_TCB_LOCK(stcb);
2655         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2656
2657         new_inp->sctp_ep.time_of_secret_change =
2658             old_inp->sctp_ep.time_of_secret_change;
2659         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2660             sizeof(old_inp->sctp_ep.secret_key));
2661         new_inp->sctp_ep.current_secret_number =
2662             old_inp->sctp_ep.current_secret_number;
2663         new_inp->sctp_ep.last_secret_number =
2664             old_inp->sctp_ep.last_secret_number;
2665         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2666
2667         /* make it so new data pours into the new socket */
2668         stcb->sctp_socket = new_inp->sctp_socket;
2669         stcb->sctp_ep = new_inp;
2670
2671         /* Copy the port across */
2672         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2673         rport = stcb->rport;
2674         /* Pull the tcb from the old association */
2675         LIST_REMOVE(stcb, sctp_tcbhash);
2676         LIST_REMOVE(stcb, sctp_tcblist);
2677         if (stcb->asoc.in_asocid_hash) {
2678                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2679         }
2680         /* Now insert the new_inp into the TCP connected hash */
2681         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2682
2683         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2684         /* Its safe to access */
2685         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2686
2687         /* Now move the tcb into the endpoint list */
2688         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2689         /*
2690          * Question, do we even need to worry about the ep-hash since we
2691          * only have one connection? Probably not :> so lets get rid of it
2692          * and not suck up any kernel memory in that.
2693          */
2694         if (stcb->asoc.in_asocid_hash) {
2695                 struct sctpasochead *lhd;
2696
2697                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2698                     new_inp->hashasocidmark)];
2699                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2700         }
2701         /* Ok. Let's restart timer. */
2702         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2703                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2704                     stcb, net);
2705         }
2706
2707         SCTP_INP_INFO_WUNLOCK();
2708         if (new_inp->sctp_tcbhash != NULL) {
2709                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2710                 new_inp->sctp_tcbhash = NULL;
2711         }
2712         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2713                 /* Subset bound, so copy in the laddr list from the old_inp */
2714                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2715                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2716                         if (laddr == NULL) {
2717                                 /*
2718                                  * Gak, what can we do? This assoc is really
2719                                  * HOSED. We probably should send an abort
2720                                  * here.
2721                                  */
2722                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2723                                 continue;
2724                         }
2725                         SCTP_INCR_LADDR_COUNT();
2726                         memset(laddr, 0, sizeof(*laddr));
2727                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2728                         laddr->ifa = oladdr->ifa;
2729                         atomic_add_int(&laddr->ifa->refcount, 1);
2730                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2731                             sctp_nxt_addr);
2732                         new_inp->laddr_count++;
2733                         if (oladdr == stcb->asoc.last_used_address) {
2734                                 stcb->asoc.last_used_address = laddr;
2735                         }
2736                 }
2737         }
2738         /*
2739          * Now any running timers need to be adjusted since we really don't
2740          * care if they are running or not just blast in the new_inp into
2741          * all of them.
2742          */
2743
2744         stcb->asoc.dack_timer.ep = (void *)new_inp;
2745         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2746         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2747         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2748         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2749         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2750         /* now what about the nets? */
2751         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2752                 net->pmtu_timer.ep = (void *)new_inp;
2753                 net->hb_timer.ep = (void *)new_inp;
2754                 net->rxt_timer.ep = (void *)new_inp;
2755         }
2756         SCTP_INP_WUNLOCK(new_inp);
2757         SCTP_INP_WUNLOCK(old_inp);
2758 }
2759
2760 /*
2761  * insert an laddr entry with the given ifa for the desired list
2762  */
2763 static int
2764 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2765 {
2766         struct sctp_laddr *laddr;
2767
2768         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2769         if (laddr == NULL) {
2770                 /* out of memory? */
2771                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2772                 return (EINVAL);
2773         }
2774         SCTP_INCR_LADDR_COUNT();
2775         memset(laddr, 0, sizeof(*laddr));
2776         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2777         laddr->ifa = ifa;
2778         laddr->action = act;
2779         atomic_add_int(&ifa->refcount, 1);
2780         /* insert it */
2781         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2782
2783         return (0);
2784 }
2785
2786 /*
2787  * Remove an laddr entry from the local address list (on an assoc)
2788  */
2789 static void
2790 sctp_remove_laddr(struct sctp_laddr *laddr)
2791 {
2792
2793         /* remove from the list */
2794         LIST_REMOVE(laddr, sctp_nxt_addr);
2795         sctp_free_ifa(laddr->ifa);
2796         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2797         SCTP_DECR_LADDR_COUNT();
2798 }
2799
2800
2801
2802 /* sctp_ifap is used to bypass normal local address validation checks */
2803 int
2804 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2805     struct sctp_ifa *sctp_ifap, struct thread *p)
2806 {
2807         /* bind a ep to a socket address */
2808         struct sctppcbhead *head;
2809         struct sctp_inpcb *inp, *inp_tmp;
2810         struct inpcb *ip_inp;
2811         int port_reuse_active = 0;
2812         int bindall;
2813         uint16_t lport;
2814         int error;
2815         uint32_t vrf_id;
2816
2817         lport = 0;
2818         bindall = 1;
2819         inp = (struct sctp_inpcb *)so->so_pcb;
2820         ip_inp = (struct inpcb *)so->so_pcb;
2821 #ifdef SCTP_DEBUG
2822         if (addr) {
2823                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2824                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2825                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2826                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2827         }
2828 #endif
2829         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2830                 /* already did a bind, subsequent binds NOT allowed ! */
2831                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2832                 return (EINVAL);
2833         }
2834 #ifdef INVARIANTS
2835         if (p == NULL)
2836                 panic("null proc/thread");
2837 #endif
2838         if (addr != NULL) {
2839                 switch (addr->sa_family) {
2840 #ifdef INET
2841                 case AF_INET:
2842                         {
2843                                 struct sockaddr_in *sin;
2844
2845                                 /* IPV6_V6ONLY socket? */
2846                                 if (SCTP_IPV6_V6ONLY(inp)) {
2847                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2848                                         return (EINVAL);
2849                                 }
2850                                 if (addr->sa_len != sizeof(*sin)) {
2851                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2852                                         return (EINVAL);
2853                                 }
2854
2855                                 sin = (struct sockaddr_in *)addr;
2856                                 lport = sin->sin_port;
2857                                 /*
2858                                  * For LOOPBACK the prison_local_ip4() call
2859                                  * will transmute the ip address to the
2860                                  * proper value.
2861                                  */
2862                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2863                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2864                                         return (error);
2865                                 }
2866                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2867                                         bindall = 0;
2868                                 }
2869                                 break;
2870                         }
2871 #endif
2872 #ifdef INET6
2873                 case AF_INET6:
2874                         {
2875                                 /*
2876                                  * Only for pure IPv6 Address. (No IPv4
2877                                  * Mapped!)
2878                                  */
2879                                 struct sockaddr_in6 *sin6;
2880
2881                                 sin6 = (struct sockaddr_in6 *)addr;
2882
2883                                 if (addr->sa_len != sizeof(*sin6)) {
2884                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2885                                         return (EINVAL);
2886                                 }
2887                                 lport = sin6->sin6_port;
2888                                 /*
2889                                  * For LOOPBACK the prison_local_ip6() call
2890                                  * will transmute the ipv6 address to the
2891                                  * proper value.
2892                                  */
2893                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2894                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2895                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2896                                         return (error);
2897                                 }
2898                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2899                                         bindall = 0;
2900                                         /* KAME hack: embed scopeid */
2901                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2902                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2903                                                 return (EINVAL);
2904                                         }
2905                                 }
2906                                 /* this must be cleared for ifa_ifwithaddr() */
2907                                 sin6->sin6_scope_id = 0;
2908                                 break;
2909                         }
2910 #endif
2911                 default:
2912                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2913                         return (EAFNOSUPPORT);
2914                 }
2915         }
2916         SCTP_INP_INFO_WLOCK();
2917         SCTP_INP_WLOCK(inp);
2918         /* Setup a vrf_id to be the default for the non-bind-all case. */
2919         vrf_id = inp->def_vrf_id;
2920
2921         /* increase our count due to the unlock we do */
2922         SCTP_INP_INCR_REF(inp);
2923         if (lport) {
2924                 /*
2925                  * Did the caller specify a port? if so we must see if an ep
2926                  * already has this one bound.
2927                  */
2928                 /* got to be root to get at low ports */
2929                 if (ntohs(lport) < IPPORT_RESERVED) {
2930                         if ((p != NULL) && ((error =
2931                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2932                             ) != 0)) {
2933                                 SCTP_INP_DECR_REF(inp);
2934                                 SCTP_INP_WUNLOCK(inp);
2935                                 SCTP_INP_INFO_WUNLOCK();
2936                                 return (error);
2937                         }
2938                 }
2939                 SCTP_INP_WUNLOCK(inp);
2940                 if (bindall) {
2941                         vrf_id = inp->def_vrf_id;
2942                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2943                         if (inp_tmp != NULL) {
2944                                 /*
2945                                  * lock guy returned and lower count note
2946                                  * that we are not bound so inp_tmp should
2947                                  * NEVER be inp. And it is this inp
2948                                  * (inp_tmp) that gets the reference bump,
2949                                  * so we must lower it.
2950                                  */
2951                                 SCTP_INP_DECR_REF(inp_tmp);
2952                                 /* unlock info */
2953                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2954                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2955                                         /*
2956                                          * Ok, must be one-2-one and
2957                                          * allowing port re-use
2958                                          */
2959                                         port_reuse_active = 1;
2960                                         goto continue_anyway;
2961                                 }
2962                                 SCTP_INP_DECR_REF(inp);
2963                                 SCTP_INP_INFO_WUNLOCK();
2964                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2965                                 return (EADDRINUSE);
2966                         }
2967                 } else {
2968                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2969                         if (inp_tmp != NULL) {
2970                                 /*
2971                                  * lock guy returned and lower count note
2972                                  * that we are not bound so inp_tmp should
2973                                  * NEVER be inp. And it is this inp
2974                                  * (inp_tmp) that gets the reference bump,
2975                                  * so we must lower it.
2976                                  */
2977                                 SCTP_INP_DECR_REF(inp_tmp);
2978                                 /* unlock info */
2979                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2980                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2981                                         /*
2982                                          * Ok, must be one-2-one and
2983                                          * allowing port re-use
2984                                          */
2985                                         port_reuse_active = 1;
2986                                         goto continue_anyway;
2987                                 }
2988                                 SCTP_INP_DECR_REF(inp);
2989                                 SCTP_INP_INFO_WUNLOCK();
2990                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2991                                 return (EADDRINUSE);
2992                         }
2993                 }
2994 continue_anyway:
2995                 SCTP_INP_WLOCK(inp);
2996                 if (bindall) {
2997                         /* verify that no lport is not used by a singleton */
2998                         if ((port_reuse_active == 0) &&
2999                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
3000                                 /* Sorry someone already has this one bound */
3001                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3002                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3003                                         port_reuse_active = 1;
3004                                 } else {
3005                                         SCTP_INP_DECR_REF(inp);
3006                                         SCTP_INP_WUNLOCK(inp);
3007                                         SCTP_INP_INFO_WUNLOCK();
3008                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3009                                         return (EADDRINUSE);
3010                                 }
3011                         }
3012                 }
3013         } else {
3014                 uint16_t first, last, candidate;
3015                 uint16_t count;
3016                 int done;
3017
3018                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3019                         first = MODULE_GLOBAL(ipport_hifirstauto);
3020                         last = MODULE_GLOBAL(ipport_hilastauto);
3021                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3022                         if (p && (error =
3023                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3024                             )) {
3025                                 SCTP_INP_DECR_REF(inp);
3026                                 SCTP_INP_WUNLOCK(inp);
3027                                 SCTP_INP_INFO_WUNLOCK();
3028                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3029                                 return (error);
3030                         }
3031                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3032                         last = MODULE_GLOBAL(ipport_lowlastauto);
3033                 } else {
3034                         first = MODULE_GLOBAL(ipport_firstauto);
3035                         last = MODULE_GLOBAL(ipport_lastauto);
3036                 }
3037                 if (first > last) {
3038                         uint16_t temp;
3039
3040                         temp = first;
3041                         first = last;
3042                         last = temp;
3043                 }
3044                 count = last - first + 1;       /* number of candidates */
3045                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3046
3047                 done = 0;
3048                 while (!done) {
3049                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3050                                 done = 1;
3051                         }
3052                         if (!done) {
3053                                 if (--count == 0) {
3054                                         SCTP_INP_DECR_REF(inp);
3055                                         SCTP_INP_WUNLOCK(inp);
3056                                         SCTP_INP_INFO_WUNLOCK();
3057                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3058                                         return (EADDRINUSE);
3059                                 }
3060                                 if (candidate == last)
3061                                         candidate = first;
3062                                 else
3063                                         candidate = candidate + 1;
3064                         }
3065                 }
3066                 lport = htons(candidate);
3067         }
3068         SCTP_INP_DECR_REF(inp);
3069         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3070             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3071                 /*
3072                  * this really should not happen. The guy did a non-blocking
3073                  * bind and then did a close at the same time.
3074                  */
3075                 SCTP_INP_WUNLOCK(inp);
3076                 SCTP_INP_INFO_WUNLOCK();
3077                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3078                 return (EINVAL);
3079         }
3080         /* ok we look clear to give out this port, so lets setup the binding */
3081         if (bindall) {
3082                 /* binding to all addresses, so just set in the proper flags */
3083                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3084                 /* set the automatic addr changes from kernel flag */
3085                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3086                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3087                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3088                 } else {
3089                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3090                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3091                 }
3092                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3093                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3094                 } else {
3095                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3096                 }
3097                 /*
3098                  * set the automatic mobility_base from kernel flag (by
3099                  * micchie)
3100                  */
3101                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3102                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3103                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3104                 } else {
3105                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3106                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3107                 }
3108                 /*
3109                  * set the automatic mobility_fasthandoff from kernel flag
3110                  * (by micchie)
3111                  */
3112                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3113                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3114                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3115                 } else {
3116                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3117                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3118                 }
3119         } else {
3120                 /*
3121                  * bind specific, make sure flags is off and add a new
3122                  * address structure to the sctp_addr_list inside the ep
3123                  * structure.
3124                  *
3125                  * We will need to allocate one and insert it at the head.
3126                  * The socketopt call can just insert new addresses in there
3127                  * as well. It will also have to do the embed scope kame
3128                  * hack too (before adding).
3129                  */
3130                 struct sctp_ifa *ifa;
3131                 union sctp_sockstore store;
3132
3133                 memset(&store, 0, sizeof(store));
3134                 switch (addr->sa_family) {
3135 #ifdef INET
3136                 case AF_INET:
3137                         memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3138                         store.sin.sin_port = 0;
3139                         break;
3140 #endif
3141 #ifdef INET6
3142                 case AF_INET6:
3143                         memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3144                         store.sin6.sin6_port = 0;
3145                         break;
3146 #endif
3147                 default:
3148                         break;
3149                 }
3150                 /*
3151                  * first find the interface with the bound address need to
3152                  * zero out the port to find the address! yuck! can't do
3153                  * this earlier since need port for sctp_pcb_findep()
3154                  */
3155                 if (sctp_ifap != NULL) {
3156                         ifa = sctp_ifap;
3157                 } else {
3158                         /*
3159                          * Note for BSD we hit here always other O/S's will
3160                          * pass things in via the sctp_ifap argument
3161                          * (Panda).
3162                          */
3163                         ifa = sctp_find_ifa_by_addr(&store.sa,
3164                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3165                 }
3166                 if (ifa == NULL) {
3167                         /* Can't find an interface with that address */
3168                         SCTP_INP_WUNLOCK(inp);
3169                         SCTP_INP_INFO_WUNLOCK();
3170                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3171                         return (EADDRNOTAVAIL);
3172                 }
3173 #ifdef INET6
3174                 if (addr->sa_family == AF_INET6) {
3175                         /* GAK, more FIXME IFA lock? */
3176                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3177                                 /* Can't bind a non-existent addr. */
3178                                 SCTP_INP_WUNLOCK(inp);
3179                                 SCTP_INP_INFO_WUNLOCK();
3180                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3181                                 return (EINVAL);
3182                         }
3183                 }
3184 #endif
3185                 /* we're not bound all */
3186                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3187                 /* allow bindx() to send ASCONF's for binding changes */
3188                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3189                 /* clear automatic addr changes from kernel flag */
3190                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3191
3192                 /* add this address to the endpoint list */
3193                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3194                 if (error != 0) {
3195                         SCTP_INP_WUNLOCK(inp);
3196                         SCTP_INP_INFO_WUNLOCK();
3197                         return (error);
3198                 }
3199                 inp->laddr_count++;
3200         }
3201         /* find the bucket */
3202         if (port_reuse_active) {
3203                 /* Put it into tcp 1-2-1 hash */
3204                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3205                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3206         } else {
3207                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3208         }
3209         /* put it in the bucket */
3210         LIST_INSERT_HEAD(head, inp, sctp_hash);
3211         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3212             (void *)head, ntohs(lport), port_reuse_active);
3213         /* set in the port */
3214         inp->sctp_lport = lport;
3215
3216         /* turn off just the unbound flag */
3217         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3218         SCTP_INP_WUNLOCK(inp);
3219         SCTP_INP_INFO_WUNLOCK();
3220         return (0);
3221 }
3222
3223
3224 static void
3225 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3226 {
3227         struct sctp_iterator *it, *nit;
3228
3229         /*
3230          * We enter with the only the ITERATOR_LOCK in place and a write
3231          * lock on the inp_info stuff.
3232          */
3233         it = sctp_it_ctl.cur_it;
3234         if (it && (it->vn != curvnet)) {
3235                 /* Its not looking at our VNET */
3236                 return;
3237         }
3238         if (it && (it->inp == inp)) {
3239                 /*
3240                  * This is tricky and we hold the iterator lock, but when it
3241                  * returns and gets the lock (when we release it) the
3242                  * iterator will try to operate on inp. We need to stop that
3243                  * from happening. But of course the iterator has a
3244                  * reference on the stcb and inp. We can mark it and it will
3245                  * stop.
3246                  *
3247                  * If its a single iterator situation, we set the end
3248                  * iterator flag. Otherwise we set the iterator to go to the
3249                  * next inp.
3250                  *
3251                  */
3252                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3253                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3254                 } else {
3255                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3256                 }
3257         }
3258         /*
3259          * Now go through and remove any single reference to our inp that
3260          * may be still pending on the list
3261          */
3262         SCTP_IPI_ITERATOR_WQ_LOCK();
3263         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3264                 if (it->vn != curvnet) {
3265                         continue;
3266                 }
3267                 if (it->inp == inp) {
3268                         /* This one points to me is it inp specific? */
3269                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3270                                 /* Remove and free this one */
3271                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3272                                     it, sctp_nxt_itr);
3273                                 if (it->function_atend != NULL) {
3274                                         (*it->function_atend) (it->pointer, it->val);
3275                                 }
3276                                 SCTP_FREE(it, SCTP_M_ITER);
3277                         } else {
3278                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3279                                 if (it->inp) {
3280                                         SCTP_INP_INCR_REF(it->inp);
3281                                 }
3282                         }
3283                         /*
3284                          * When its put in the refcnt is incremented so decr
3285                          * it
3286                          */
3287                         SCTP_INP_DECR_REF(inp);
3288                 }
3289         }
3290         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3291 }
3292
3293 /* release sctp_inpcb unbind the port */
3294 void
3295 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3296 {
3297         /*
3298          * Here we free a endpoint. We must find it (if it is in the Hash
3299          * table) and remove it from there. Then we must also find it in the
3300          * overall list and remove it from there. After all removals are
3301          * complete then any timer has to be stopped. Then start the actual
3302          * freeing. a) Any local lists. b) Any associations. c) The hash of
3303          * all associations. d) finally the ep itself.
3304          */
3305         struct sctp_tcb *asoc, *nasoc;
3306         struct sctp_laddr *laddr, *nladdr;
3307         struct inpcb *ip_pcb;
3308         struct socket *so;
3309         int being_refed = 0;
3310         struct sctp_queued_to_read *sq, *nsq;
3311         int cnt;
3312         sctp_sharedkey_t *shared_key, *nshared_key;
3313
3314
3315 #ifdef SCTP_LOG_CLOSING
3316         sctp_log_closing(inp, NULL, 0);
3317 #endif
3318         SCTP_ITERATOR_LOCK();
3319         /* mark any iterators on the list or being processed */
3320         sctp_iterator_inp_being_freed(inp);
3321         SCTP_ITERATOR_UNLOCK();
3322         so = inp->sctp_socket;
3323         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3324                 /* been here before.. eeks.. get out of here */
3325                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3326 #ifdef SCTP_LOG_CLOSING
3327                 sctp_log_closing(inp, NULL, 1);
3328 #endif
3329                 return;
3330         }
3331         SCTP_ASOC_CREATE_LOCK(inp);
3332         SCTP_INP_INFO_WLOCK();
3333
3334         SCTP_INP_WLOCK(inp);
3335         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3336                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3337                 /* socket is gone, so no more wakeups allowed */
3338                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3339                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3340                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3341
3342         }
3343         /* First time through we have the socket lock, after that no more. */
3344         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3345             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3346
3347         if (inp->control) {
3348                 sctp_m_freem(inp->control);
3349                 inp->control = NULL;
3350         }
3351         if (inp->pkt) {
3352                 sctp_m_freem(inp->pkt);
3353                 inp->pkt = NULL;
3354         }
3355         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3356                                          * here but I will be nice :> (i.e.
3357                                          * ip_pcb = ep;) */
3358         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3359                 int cnt_in_sd;
3360
3361                 cnt_in_sd = 0;
3362                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3363                         SCTP_TCB_LOCK(asoc);
3364                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3365                                 /* Skip guys being freed */
3366                                 cnt_in_sd++;
3367                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3368                                         /*
3369                                          * Special case - we did not start a
3370                                          * kill timer on the asoc due to it
3371                                          * was not closed. So go ahead and
3372                                          * start it now.
3373                                          */
3374                                         SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3375                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3376                                 }
3377                                 SCTP_TCB_UNLOCK(asoc);
3378                                 continue;
3379                         }
3380                         if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
3381                             (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3382                             (asoc->asoc.total_output_queue_size == 0)) {
3383                                 /*
3384                                  * If we have data in queue, we don't want
3385                                  * to just free since the app may have done,
3386                                  * send()/close or connect/send/close. And
3387                                  * it wants the data to get across first.
3388                                  */
3389                                 /* Just abandon things in the front states */
3390                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3391                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3392                                         cnt_in_sd++;
3393                                 }
3394                                 continue;
3395                         }
3396                         /* Disconnect the socket please */
3397                         asoc->sctp_socket = NULL;
3398                         SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET);
3399                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3400                             (asoc->asoc.control_pdapi) ||
3401                             (asoc->asoc.size_on_all_streams > 0) ||
3402                             (so && (so->so_rcv.sb_cc > 0))) {
3403                                 /* Left with Data unread */
3404                                 struct mbuf *op_err;
3405
3406                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3407                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3408                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3409                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3410                                 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3411                                     (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3412                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3413                                 }
3414                                 if (sctp_free_assoc(inp, asoc,
3415                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3416                                         cnt_in_sd++;
3417                                 }
3418                                 continue;
3419                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3420                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3421                             (asoc->asoc.stream_queue_cnt == 0)) {
3422                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3423                                         goto abort_anyway;
3424                                 }
3425                                 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3426                                     (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3427                                         struct sctp_nets *netp;
3428
3429                                         /*
3430                                          * there is nothing queued to send,
3431                                          * so I send shutdown
3432                                          */
3433                                         if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3434                                             (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3435                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3436                                         }
3437                                         SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
3438                                         sctp_stop_timers_for_shutdown(asoc);
3439                                         if (asoc->asoc.alternate) {
3440                                                 netp = asoc->asoc.alternate;
3441                                         } else {
3442                                                 netp = asoc->asoc.primary_destination;
3443                                         }
3444                                         sctp_send_shutdown(asoc, netp);
3445                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3446                                             netp);
3447                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
3448                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3449                                 }
3450                         } else {
3451                                 /* mark into shutdown pending */
3452                                 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
3453                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
3454                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3455                                         SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT);
3456                                 }
3457                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3458                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3459                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3460                                         struct mbuf *op_err;
3461
3462                         abort_anyway:
3463                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3464                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3465                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3466                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3467                                         if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3468                                             (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3469                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3470                                         }
3471                                         if (sctp_free_assoc(inp, asoc,
3472                                             SCTP_PCBFREE_NOFORCE,
3473                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3474                                                 cnt_in_sd++;
3475                                         }
3476                                         continue;
3477                                 } else {
3478                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3479                                 }
3480                         }
3481                         cnt_in_sd++;
3482                         SCTP_TCB_UNLOCK(asoc);
3483                 }
3484                 /* now is there some left in our SHUTDOWN state? */
3485                 if (cnt_in_sd) {
3486 #ifdef SCTP_LOG_CLOSING
3487                         sctp_log_closing(inp, NULL, 2);
3488 #endif
3489                         inp->sctp_socket = NULL;
3490                         SCTP_INP_WUNLOCK(inp);
3491                         SCTP_ASOC_CREATE_UNLOCK(inp);
3492                         SCTP_INP_INFO_WUNLOCK();
3493                         return;
3494                 }
3495         }
3496         inp->sctp_socket = NULL;
3497         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3498             SCTP_PCB_FLAGS_UNBOUND) {
3499                 /*
3500                  * ok, this guy has been bound. It's port is somewhere in
3501                  * the SCTP_BASE_INFO(hash table). Remove it!
3502                  */
3503                 LIST_REMOVE(inp, sctp_hash);
3504                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3505         }
3506
3507         /*
3508          * If there is a timer running to kill us, forget it, since it may
3509          * have a contest on the INP lock.. which would cause us to die ...
3510          */
3511         cnt = 0;
3512         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3513                 SCTP_TCB_LOCK(asoc);
3514                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3515                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3516                                 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3517                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3518                         }
3519                         cnt++;
3520                         SCTP_TCB_UNLOCK(asoc);
3521                         continue;
3522                 }
3523                 /* Free associations that are NOT killing us */
3524                 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
3525                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3526                         struct mbuf *op_err;
3527
3528                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3529                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3530                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3531                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3532                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3533                         cnt++;
3534                         SCTP_TCB_UNLOCK(asoc);
3535                         continue;
3536                 }
3537                 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3538                     (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3539                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3540                 }
3541                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3542                     SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3543                         cnt++;
3544                 }
3545         }
3546         if (cnt) {
3547                 /* Ok we have someone out there that will kill us */
3548 #ifdef SCTP_LOG_CLOSING
3549                 sctp_log_closing(inp, NULL, 3);
3550 #endif
3551                 SCTP_INP_WUNLOCK(inp);
3552                 SCTP_ASOC_CREATE_UNLOCK(inp);
3553                 SCTP_INP_INFO_WUNLOCK();
3554                 return;
3555         }
3556         if (SCTP_INP_LOCK_CONTENDED(inp))
3557                 being_refed++;
3558         if (SCTP_INP_READ_CONTENDED(inp))
3559                 being_refed++;
3560         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3561                 being_refed++;
3562
3563         if ((inp->refcount) ||
3564             (being_refed) ||
3565             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3566 #ifdef SCTP_LOG_CLOSING
3567                 sctp_log_closing(inp, NULL, 4);
3568 #endif
3569                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3570                 SCTP_INP_WUNLOCK(inp);
3571                 SCTP_ASOC_CREATE_UNLOCK(inp);
3572                 SCTP_INP_INFO_WUNLOCK();
3573                 return;
3574         }
3575         inp->sctp_ep.signature_change.type = 0;
3576         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3577         /*
3578          * Remove it from the list .. last thing we need a lock for.
3579          */
3580         LIST_REMOVE(inp, sctp_list);
3581         SCTP_INP_WUNLOCK(inp);
3582         SCTP_ASOC_CREATE_UNLOCK(inp);
3583         SCTP_INP_INFO_WUNLOCK();
3584         /*
3585          * Now we release all locks. Since this INP cannot be found anymore
3586          * except possibly by the kill timer that might be running. We call
3587          * the drain function here. It should hit the case were it sees the
3588          * ACTIVE flag cleared and exit out freeing us to proceed and
3589          * destroy everything.
3590          */
3591         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3592                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3593         } else {
3594                 /* Probably un-needed */
3595                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3596         }
3597
3598 #ifdef SCTP_LOG_CLOSING
3599         sctp_log_closing(inp, NULL, 5);
3600 #endif
3601
3602
3603         if ((inp->sctp_asocidhash) != NULL) {
3604                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3605                 inp->sctp_asocidhash = NULL;
3606         }
3607         /* sa_ignore FREED_MEMORY */
3608         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3609                 /* Its only abandoned if it had data left */
3610                 if (sq->length)
3611                         SCTP_STAT_INCR(sctps_left_abandon);
3612
3613                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3614                 sctp_free_remote_addr(sq->whoFrom);
3615                 if (so)
3616                         so->so_rcv.sb_cc -= sq->length;
3617                 if (sq->data) {
3618                         sctp_m_freem(sq->data);
3619                         sq->data = NULL;
3620                 }
3621                 /*
3622                  * no need to free the net count, since at this point all
3623                  * assoc's are gone.
3624                  */
3625                 sctp_free_a_readq(NULL, sq);
3626         }
3627         /* Now the sctp_pcb things */
3628         /*
3629          * free each asoc if it is not already closed/free. we can't use the
3630          * macro here since le_next will get freed as part of the
3631          * sctp_free_assoc() call.
3632          */
3633         if (ip_pcb->inp_options) {
3634                 (void)sctp_m_free(ip_pcb->inp_options);
3635                 ip_pcb->inp_options = 0;
3636         }
3637
3638
3639 #ifdef INET6
3640         if (ip_pcb->inp_vflag & INP_IPV6) {
3641                 ip6_freepcbopts(ip_pcb->in6p_outputopts);
3642         }
3643 #endif                          /* INET6 */
3644         ip_pcb->inp_vflag = 0;
3645         /* free up authentication fields */
3646         if (inp->sctp_ep.local_auth_chunks != NULL)
3647                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3648         if (inp->sctp_ep.local_hmacs != NULL)
3649                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3650
3651         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3652                 LIST_REMOVE(shared_key, next);
3653                 sctp_free_sharedkey(shared_key);
3654                 /* sa_ignore FREED_MEMORY */
3655         }
3656
3657         /*
3658          * if we have an address list the following will free the list of
3659          * ifaddr's that are set into this ep. Again macro limitations here,
3660          * since the LIST_FOREACH could be a bad idea.
3661          */
3662         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3663                 sctp_remove_laddr(laddr);
3664         }
3665
3666 #ifdef SCTP_TRACK_FREED_ASOCS
3667         /* TEMP CODE */
3668         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3669                 LIST_REMOVE(asoc, sctp_tcblist);
3670                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3671                 SCTP_DECR_ASOC_COUNT();
3672         }
3673         /* *** END TEMP CODE *** */
3674 #endif
3675         /* Now lets see about freeing the EP hash table. */
3676         if (inp->sctp_tcbhash != NULL) {
3677                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3678                 inp->sctp_tcbhash = NULL;
3679         }
3680         /* Now we must put the ep memory back into the zone pool */
3681         crfree(inp->ip_inp.inp.inp_cred);
3682         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3683         SCTP_INP_LOCK_DESTROY(inp);
3684         SCTP_INP_READ_DESTROY(inp);
3685         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3686         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3687         SCTP_DECR_EP_COUNT();
3688 }
3689
3690
3691 struct sctp_nets *
3692 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3693 {
3694         struct sctp_nets *net;
3695
3696         /* locate the address */
3697         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3698                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3699                         return (net);
3700         }
3701         return (NULL);
3702 }
3703
3704
3705 int
3706 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3707 {
3708         struct sctp_ifa *sctp_ifa;
3709
3710         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3711         if (sctp_ifa) {
3712                 return (1);
3713         } else {
3714                 return (0);
3715         }
3716 }
3717
3718 /*
3719  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3720  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3721  * stats of stuff.
3722  */
3723 int
3724 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3725     struct sctp_nets **netp, uint16_t port, int set_scope, int from)
3726 {
3727         /*
3728          * The following is redundant to the same lines in the
3729          * sctp_aloc_assoc() but is needed since others call the add address
3730          * function
3731          */
3732         struct sctp_nets *net, *netfirst;
3733         int addr_inscope;
3734
3735         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3736             from);
3737         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3738
3739         netfirst = sctp_findnet(stcb, newaddr);
3740         if (netfirst) {
3741                 /*
3742                  * Lie and return ok, we don't want to make the association
3743                  * go away for this behavior. It will happen in the TCP
3744                  * model in a connected socket. It does not reach the hash
3745                  * table until after the association is built so it can't be
3746                  * found. Mark as reachable, since the initial creation will
3747                  * have been cleared and the NOT_IN_ASSOC flag will have
3748                  * been added... and we don't want to end up removing it
3749                  * back out.
3750                  */
3751                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3752                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3753                             SCTP_ADDR_UNCONFIRMED);
3754                 } else {
3755                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3756                 }
3757
3758                 return (0);
3759         }
3760         addr_inscope = 1;
3761         switch (newaddr->sa_family) {
3762 #ifdef INET
3763         case AF_INET:
3764                 {
3765                         struct sockaddr_in *sin;
3766
3767                         sin = (struct sockaddr_in *)newaddr;
3768                         if (sin->sin_addr.s_addr == 0) {
3769                                 /* Invalid address */
3770                                 return (-1);
3771                         }
3772                         /* zero out the zero area */
3773                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3774
3775                         /* assure len is set */
3776                         sin->sin_len = sizeof(struct sockaddr_in);
3777                         if (set_scope) {
3778                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3779                                         stcb->asoc.scope.ipv4_local_scope = 1;
3780                                 }
3781                         } else {
3782                                 /* Validate the address is in scope */
3783                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3784                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3785                                         addr_inscope = 0;
3786                                 }
3787                         }
3788                         break;
3789                 }
3790 #endif
3791 #ifdef INET6
3792         case AF_INET6:
3793                 {
3794                         struct sockaddr_in6 *sin6;
3795
3796                         sin6 = (struct sockaddr_in6 *)newaddr;
3797                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3798                                 /* Invalid address */
3799                                 return (-1);
3800                         }
3801                         /* assure len is set */
3802                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3803                         if (set_scope) {
3804                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3805                                         stcb->asoc.scope.loopback_scope = 1;
3806                                         stcb->asoc.scope.local_scope = 0;
3807                                         stcb->asoc.scope.ipv4_local_scope = 1;
3808                                         stcb->asoc.scope.site_scope = 1;
3809                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3810                                         /*
3811                                          * If the new destination is a
3812                                          * LINK_LOCAL we must have common
3813                                          * site scope. Don't set the local
3814                                          * scope since we may not share all
3815                                          * links, only loopback can do this.
3816                                          * Links on the local network would
3817                                          * also be on our private network
3818                                          * for v4 too.
3819                                          */
3820                                         stcb->asoc.scope.ipv4_local_scope = 1;
3821                                         stcb->asoc.scope.site_scope = 1;
3822                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3823                                         /*
3824                                          * If the new destination is
3825                                          * SITE_LOCAL then we must have site
3826                                          * scope in common.
3827                                          */
3828                                         stcb->asoc.scope.site_scope = 1;
3829                                 }
3830                         } else {
3831                                 /* Validate the address is in scope */
3832                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3833                                     (stcb->asoc.scope.loopback_scope == 0)) {
3834                                         addr_inscope = 0;
3835                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3836                                     (stcb->asoc.scope.local_scope == 0)) {
3837                                         addr_inscope = 0;
3838                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3839                                     (stcb->asoc.scope.site_scope == 0)) {
3840                                         addr_inscope = 0;
3841                                 }
3842                         }
3843                         break;
3844                 }
3845 #endif
3846         default:
3847                 /* not supported family type */
3848                 return (-1);
3849         }
3850         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3851         if (net == NULL) {
3852                 return (-1);
3853         }
3854         SCTP_INCR_RADDR_COUNT();
3855         memset(net, 0, sizeof(struct sctp_nets));
3856         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3857         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3858         switch (newaddr->sa_family) {
3859 #ifdef INET
3860         case AF_INET:
3861                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3862                 break;
3863 #endif
3864 #ifdef INET6
3865         case AF_INET6:
3866                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3867                 break;
3868 #endif
3869         default:
3870                 break;
3871         }
3872         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3873         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3874                 stcb->asoc.scope.loopback_scope = 1;
3875                 stcb->asoc.scope.ipv4_local_scope = 1;
3876                 stcb->asoc.scope.local_scope = 0;
3877                 stcb->asoc.scope.site_scope = 1;
3878                 addr_inscope = 1;
3879         }
3880         net->failure_threshold = stcb->asoc.def_net_failure;
3881         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3882         if (addr_inscope == 0) {
3883                 net->dest_state = (SCTP_ADDR_REACHABLE |
3884                     SCTP_ADDR_OUT_OF_SCOPE);
3885         } else {
3886                 if (from == SCTP_ADDR_IS_CONFIRMED)
3887                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3888                         net->dest_state = SCTP_ADDR_REACHABLE;
3889                 else
3890                         net->dest_state = SCTP_ADDR_REACHABLE |
3891                             SCTP_ADDR_UNCONFIRMED;
3892         }
3893         /*
3894          * We set this to 0, the timer code knows that this means its an
3895          * initial value
3896          */
3897         net->rto_needed = 1;
3898         net->RTO = 0;
3899         net->RTO_measured = 0;
3900         stcb->asoc.numnets++;
3901         net->ref_count = 1;
3902         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3903         net->port = port;
3904         net->dscp = stcb->asoc.default_dscp;
3905 #ifdef INET6
3906         net->flowlabel = stcb->asoc.default_flowlabel;
3907 #endif
3908         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3909                 net->dest_state |= SCTP_ADDR_NOHB;
3910         } else {
3911                 net->dest_state &= ~SCTP_ADDR_NOHB;
3912         }
3913         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3914                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3915         } else {
3916                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3917         }
3918         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3919         /* Init the timer structure */
3920         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3921         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3922         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3923
3924         /* Now generate a route for this guy */
3925 #ifdef INET6
3926         /* KAME hack: embed scopeid */
3927         if (newaddr->sa_family == AF_INET6) {
3928                 struct sockaddr_in6 *sin6;
3929
3930                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3931                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3932                 sin6->sin6_scope_id = 0;
3933         }
3934 #endif
3935         SCTP_RTALLOC((sctp_route_t *)&net->ro,
3936             stcb->asoc.vrf_id,
3937             stcb->sctp_ep->fibnum);
3938
3939         net->src_addr_selected = 0;
3940         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3941                 /* Get source address */
3942                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3943                     stcb,
3944                     (sctp_route_t *)&net->ro,
3945                     net,
3946                     0,
3947                     stcb->asoc.vrf_id);
3948                 if (stcb->asoc.default_mtu > 0) {
3949                         net->mtu = stcb->asoc.default_mtu;
3950                         switch (net->ro._l_addr.sa.sa_family) {
3951 #ifdef INET
3952                         case AF_INET:
3953                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
3954                                 break;
3955 #endif
3956 #ifdef INET6
3957                         case AF_INET6:
3958                                 net->mtu += SCTP_MIN_OVERHEAD;
3959                                 break;
3960 #endif
3961                         default:
3962                                 break;
3963                         }
3964 #if defined(INET) || defined(INET6)
3965                         if (net->port) {
3966                                 net->mtu += (uint32_t)sizeof(struct udphdr);
3967                         }
3968 #endif
3969                 } else if (net->ro._s_addr != NULL) {
3970                         uint32_t imtu, rmtu, hcmtu;
3971
3972                         net->src_addr_selected = 1;
3973                         /* Now get the interface MTU */
3974                         if (net->ro._s_addr->ifn_p != NULL) {
3975                                 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3976                         } else {
3977                                 imtu = 0;
3978                         }
3979                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh);
3980                         hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum);
3981                         net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu);
3982                 }
3983         }
3984         if (net->mtu == 0) {
3985                 if (stcb->asoc.default_mtu > 0) {
3986                         net->mtu = stcb->asoc.default_mtu;
3987                         switch (net->ro._l_addr.sa.sa_family) {
3988 #ifdef INET
3989                         case AF_INET:
3990                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
3991                                 break;
3992 #endif
3993 #ifdef INET6
3994                         case AF_INET6:
3995                                 net->mtu += SCTP_MIN_OVERHEAD;
3996                                 break;
3997 #endif
3998                         default:
3999                                 break;
4000                         }
4001 #if defined(INET) || defined(INET6)
4002                         if (net->port) {
4003                                 net->mtu += (uint32_t)sizeof(struct udphdr);
4004                         }
4005 #endif
4006                 } else {
4007                         switch (newaddr->sa_family) {
4008 #ifdef INET
4009                         case AF_INET:
4010                                 net->mtu = SCTP_DEFAULT_MTU;
4011                                 break;
4012 #endif
4013 #ifdef INET6
4014                         case AF_INET6:
4015                                 net->mtu = 1280;
4016                                 break;
4017 #endif
4018                         default:
4019                                 break;
4020                         }
4021                 }
4022         }
4023 #if defined(INET) || defined(INET6)
4024         if (net->port) {
4025                 net->mtu -= (uint32_t)sizeof(struct udphdr);
4026         }
4027 #endif
4028         if (from == SCTP_ALLOC_ASOC) {
4029                 stcb->asoc.smallest_mtu = net->mtu;
4030         }
4031         if (stcb->asoc.smallest_mtu > net->mtu) {
4032                 sctp_pathmtu_adjustment(stcb, net->mtu);
4033         }
4034 #ifdef INET6
4035         if (newaddr->sa_family == AF_INET6) {
4036                 struct sockaddr_in6 *sin6;
4037
4038                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4039                 (void)sa6_recoverscope(sin6);
4040         }
4041 #endif
4042
4043         /* JRS - Use the congestion control given in the CC module */
4044         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4045                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4046
4047         /*
4048          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4049          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4050          */
4051         net->find_pseudo_cumack = 1;
4052         net->find_rtx_pseudo_cumack = 1;
4053         /* Choose an initial flowid. */
4054         net->flowid = stcb->asoc.my_vtag ^
4055             ntohs(stcb->rport) ^
4056             ntohs(stcb->sctp_ep->sctp_lport);
4057         net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4058         if (netp) {
4059                 *netp = net;
4060         }
4061         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4062         if (net->ro.ro_nh == NULL) {
4063                 /* Since we have no route put it at the back */
4064                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4065         } else if (netfirst == NULL) {
4066                 /* We are the first one in the pool. */
4067                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4068         } else if (netfirst->ro.ro_nh == NULL) {
4069                 /*
4070                  * First one has NO route. Place this one ahead of the first
4071                  * one.
4072                  */
4073                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4074         } else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) {
4075                 /*
4076                  * This one has a different interface than the one at the
4077                  * top of the list. Place it ahead.
4078                  */
4079                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4080         } else {
4081                 /*
4082                  * Ok we have the same interface as the first one. Move
4083                  * forward until we find either a) one with a NULL route...
4084                  * insert ahead of that b) one with a different ifp.. insert
4085                  * after that. c) end of the list.. insert at the tail.
4086                  */
4087                 struct sctp_nets *netlook;
4088
4089                 do {
4090                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4091                         if (netlook == NULL) {
4092                                 /* End of the list */
4093                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4094                                 break;
4095                         } else if (netlook->ro.ro_nh == NULL) {
4096                                 /* next one has NO route */
4097                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4098                                 break;
4099                         } else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) {
4100                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4101                                     net, sctp_next);
4102                                 break;
4103                         }
4104                         /* Shift forward */
4105                         netfirst = netlook;
4106                 } while (netlook != NULL);
4107         }
4108
4109         /* got to have a primary set */
4110         if (stcb->asoc.primary_destination == 0) {
4111                 stcb->asoc.primary_destination = net;
4112         } else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) &&
4113                     (net->ro.ro_nh) &&
4114             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4115                 /* No route to current primary adopt new primary */
4116                 stcb->asoc.primary_destination = net;
4117         }
4118         /* Validate primary is first */
4119         net = TAILQ_FIRST(&stcb->asoc.nets);
4120         if ((net != stcb->asoc.primary_destination) &&
4121             (stcb->asoc.primary_destination)) {
4122                 /*
4123                  * first one on the list is NOT the primary sctp_cmpaddr()
4124                  * is much more efficient if the primary is the first on the
4125                  * list, make it so.
4126                  */
4127                 TAILQ_REMOVE(&stcb->asoc.nets,
4128                     stcb->asoc.primary_destination, sctp_next);
4129                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4130                     stcb->asoc.primary_destination, sctp_next);
4131         }
4132         return (0);
4133 }
4134
4135
4136 static uint32_t
4137 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4138 {
4139         uint32_t id;
4140         struct sctpasochead *head;
4141         struct sctp_tcb *lstcb;
4142
4143 try_again:
4144         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4145                 /* TSNH */
4146                 return (0);
4147         }
4148         /*
4149          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4150          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4151          */
4152         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4153                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4154         }
4155         id = inp->sctp_associd_counter;
4156         inp->sctp_associd_counter++;
4157         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4158         if (lstcb) {
4159                 goto try_again;
4160         }
4161         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4162         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4163         stcb->asoc.in_asocid_hash = 1;
4164         return (id);
4165 }
4166
4167 /*
4168  * allocate an association and add it to the endpoint. The caller must be
4169  * careful to add all additional addresses once they are know right away or
4170  * else the assoc will be may experience a blackout scenario.
4171  */
4172 struct sctp_tcb *
4173 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4174     int *error, uint32_t override_tag, uint32_t vrf_id,
4175     uint16_t o_streams, uint16_t port,
4176     struct thread *p,
4177     int initialize_auth_params)
4178 {
4179         /* note the p argument is only valid in unbound sockets */
4180
4181         struct sctp_tcb *stcb;
4182         struct sctp_association *asoc;
4183         struct sctpasochead *head;
4184         uint16_t rport;
4185         int err;
4186
4187         /*
4188          * Assumption made here: Caller has done a
4189          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4190          * address does not exist already.
4191          */
4192         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4193                 /* Hit max assoc, sorry no more */
4194                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4195                 *error = ENOBUFS;
4196                 return (NULL);
4197         }
4198         if (firstaddr == NULL) {
4199                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4200                 *error = EINVAL;
4201                 return (NULL);
4202         }
4203         SCTP_INP_RLOCK(inp);
4204         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4205             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4206             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4207                 /*
4208                  * If its in the TCP pool, its NOT allowed to create an
4209                  * association. The parent listener needs to call
4210                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4211                  * off, or connected one does this.. its an error.
4212                  */
4213                 SCTP_INP_RUNLOCK(inp);
4214                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4215                 *error = EINVAL;
4216                 return (NULL);
4217         }
4218         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4219             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4220                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4221                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4222                         SCTP_INP_RUNLOCK(inp);
4223                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4224                         *error = EINVAL;
4225                         return (NULL);
4226                 }
4227         }
4228         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4229 #ifdef SCTP_DEBUG
4230         if (firstaddr) {
4231                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4232                 switch (firstaddr->sa_family) {
4233 #ifdef INET
4234                 case AF_INET:
4235                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4236                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4237                         break;
4238 #endif
4239 #ifdef INET6
4240                 case AF_INET6:
4241                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4242                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4243                         break;
4244 #endif
4245                 default:
4246                         break;
4247                 }
4248         } else {
4249                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4250         }
4251 #endif                          /* SCTP_DEBUG */
4252         switch (firstaddr->sa_family) {
4253 #ifdef INET
4254         case AF_INET:
4255                 {
4256                         struct sockaddr_in *sin;
4257
4258                         sin = (struct sockaddr_in *)firstaddr;
4259                         if ((ntohs(sin->sin_port) == 0) ||
4260                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4261                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4262                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4263                                 /* Invalid address */
4264                                 SCTP_INP_RUNLOCK(inp);
4265                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4266                                 *error = EINVAL;
4267                                 return (NULL);
4268                         }
4269                         rport = sin->sin_port;
4270                         break;
4271                 }
4272 #endif
4273 #ifdef INET6
4274         case AF_INET6:
4275                 {
4276                         struct sockaddr_in6 *sin6;
4277
4278                         sin6 = (struct sockaddr_in6 *)firstaddr;
4279                         if ((ntohs(sin6->sin6_port) == 0) ||
4280                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4281                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4282                                 /* Invalid address */
4283                                 SCTP_INP_RUNLOCK(inp);
4284                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4285                                 *error = EINVAL;
4286                                 return (NULL);
4287                         }
4288                         rport = sin6->sin6_port;
4289                         break;
4290                 }
4291 #endif
4292         default:
4293                 /* not supported family type */
4294                 SCTP_INP_RUNLOCK(inp);
4295                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4296                 *error = EINVAL;
4297                 return (NULL);
4298         }
4299         SCTP_INP_RUNLOCK(inp);
4300         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4301                 /*
4302                  * If you have not performed a bind, then we need to do the
4303                  * ephemeral bind for you.
4304                  */
4305                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4306                     (struct sockaddr *)NULL,
4307                     (struct sctp_ifa *)NULL,
4308                     p
4309                     ))) {
4310                         /* bind error, probably perm */
4311                         *error = err;
4312                         return (NULL);
4313                 }
4314         }
4315         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4316         if (stcb == NULL) {
4317                 /* out of memory? */
4318                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4319                 *error = ENOMEM;
4320                 return (NULL);
4321         }
4322         SCTP_INCR_ASOC_COUNT();
4323
4324         memset(stcb, 0, sizeof(*stcb));
4325         asoc = &stcb->asoc;
4326
4327         SCTP_TCB_LOCK_INIT(stcb);
4328         SCTP_TCB_SEND_LOCK_INIT(stcb);
4329         stcb->rport = rport;
4330         /* setup back pointer's */
4331         stcb->sctp_ep = inp;
4332         stcb->sctp_socket = inp->sctp_socket;
4333         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
4334                 /* failed */
4335                 SCTP_TCB_LOCK_DESTROY(stcb);
4336                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4337                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4338                 SCTP_DECR_ASOC_COUNT();
4339                 *error = err;
4340                 return (NULL);
4341         }
4342         /* and the port */
4343         SCTP_INP_INFO_WLOCK();
4344         SCTP_INP_WLOCK(inp);
4345         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4346                 /* inpcb freed while alloc going on */
4347                 SCTP_TCB_LOCK_DESTROY(stcb);
4348                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4349                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4350                 SCTP_INP_WUNLOCK(inp);
4351                 SCTP_INP_INFO_WUNLOCK();
4352                 SCTP_DECR_ASOC_COUNT();
4353                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4354                 *error = EINVAL;
4355                 return (NULL);
4356         }
4357         SCTP_TCB_LOCK(stcb);
4358
4359         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4360         /* now that my_vtag is set, add it to the hash */
4361         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4362         /* put it in the bucket in the vtag hash of assoc's for the system */
4363         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4364         SCTP_INP_INFO_WUNLOCK();
4365
4366         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4367                 /* failure.. memory error? */
4368                 if (asoc->strmout) {
4369                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4370                         asoc->strmout = NULL;
4371                 }
4372                 if (asoc->mapping_array) {
4373                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4374                         asoc->mapping_array = NULL;
4375                 }
4376                 if (asoc->nr_mapping_array) {
4377                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4378                         asoc->nr_mapping_array = NULL;
4379                 }
4380                 SCTP_DECR_ASOC_COUNT();
4381                 SCTP_TCB_UNLOCK(stcb);
4382                 SCTP_TCB_LOCK_DESTROY(stcb);
4383                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4384                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4385                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4386                 SCTP_INP_WUNLOCK(inp);
4387                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4388                 *error = ENOBUFS;
4389                 return (NULL);
4390         }
4391         /* Init all the timers */
4392         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4393         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4394         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4395         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4396         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4397         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4398
4399         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4400         /* now file the port under the hash as well */
4401         if (inp->sctp_tcbhash != NULL) {
4402                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4403                     inp->sctp_hashmark)];
4404                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4405         }
4406         if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) {
4407                 sctp_initialize_auth_params(inp, stcb);
4408         }
4409         SCTP_INP_WUNLOCK(inp);
4410         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4411         return (stcb);
4412 }
4413
4414
4415 void
4416 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4417 {
4418         struct sctp_inpcb *inp;
4419         struct sctp_association *asoc;
4420
4421         inp = stcb->sctp_ep;
4422         asoc = &stcb->asoc;
4423         asoc->numnets--;
4424         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4425         if (net == asoc->primary_destination) {
4426                 /* Reset primary */
4427                 struct sctp_nets *lnet;
4428
4429                 lnet = TAILQ_FIRST(&asoc->nets);
4430                 /*
4431                  * Mobility adaptation Ideally, if deleted destination is
4432                  * the primary, it becomes a fast retransmission trigger by
4433                  * the subsequent SET PRIMARY. (by micchie)
4434                  */
4435                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4436                     SCTP_MOBILITY_BASE) ||
4437                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4438                     SCTP_MOBILITY_FASTHANDOFF)) {
4439                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4440                         if (asoc->deleted_primary != NULL) {
4441                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4442                                 goto out;
4443                         }
4444                         asoc->deleted_primary = net;
4445                         atomic_add_int(&net->ref_count, 1);
4446                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4447                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4448                         sctp_mobility_feature_on(stcb->sctp_ep,
4449                             SCTP_MOBILITY_PRIM_DELETED);
4450                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4451                             stcb->sctp_ep, stcb, NULL);
4452                 }
4453 out:
4454                 /* Try to find a confirmed primary */
4455                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4456         }
4457         if (net == asoc->last_data_chunk_from) {
4458                 /* Reset primary */
4459                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4460         }
4461         if (net == asoc->last_control_chunk_from) {
4462                 /* Clear net */
4463                 asoc->last_control_chunk_from = NULL;
4464         }
4465         if (net == stcb->asoc.alternate) {
4466                 sctp_free_remote_addr(stcb->asoc.alternate);
4467                 stcb->asoc.alternate = NULL;
4468         }
4469         sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
4470             SCTP_FROM_SCTP_PCB + SCTP_LOC_9);
4471         sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
4472             SCTP_FROM_SCTP_PCB + SCTP_LOC_10);
4473         net->dest_state |= SCTP_ADDR_BEING_DELETED;
4474         sctp_free_remote_addr(net);
4475 }
4476
4477 /*
4478  * remove a remote endpoint address from an association, it will fail if the
4479  * address does not exist.
4480  */
4481 int
4482 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4483 {
4484         /*
4485          * Here we need to remove a remote address. This is quite simple, we
4486          * first find it in the list of address for the association
4487          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4488          * on that item. Note we do not allow it to be removed if there are
4489          * no other addresses.
4490          */
4491         struct sctp_association *asoc;
4492         struct sctp_nets *net, *nnet;
4493
4494         asoc = &stcb->asoc;
4495
4496         /* locate the address */
4497         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4498                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4499                         continue;
4500                 }
4501                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4502                     remaddr)) {
4503                         /* we found the guy */
4504                         if (asoc->numnets < 2) {
4505                                 /* Must have at LEAST two remote addresses */
4506                                 return (-1);
4507                         } else {
4508                                 sctp_remove_net(stcb, net);
4509                                 return (0);
4510                         }
4511                 }
4512         }
4513         /* not found. */
4514         return (-2);
4515 }
4516
4517 void
4518 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4519 {
4520         struct sctpvtaghead *chain;
4521         struct sctp_tagblock *twait_block;
4522         int found = 0;
4523         int i;
4524
4525         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4526         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4527                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4528                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4529                             (twait_block->vtag_block[i].lport == lport) &&
4530                             (twait_block->vtag_block[i].rport == rport)) {
4531                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4532                                 twait_block->vtag_block[i].v_tag = 0;
4533                                 twait_block->vtag_block[i].lport = 0;
4534                                 twait_block->vtag_block[i].rport = 0;
4535                                 found = 1;
4536                                 break;
4537                         }
4538                 }
4539                 if (found)
4540                         break;
4541         }
4542 }
4543
4544 int
4545 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4546 {
4547         struct sctpvtaghead *chain;
4548         struct sctp_tagblock *twait_block;
4549         int found = 0;
4550         int i;
4551
4552         SCTP_INP_INFO_WLOCK();
4553         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4554         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4555                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4556                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4557                             (twait_block->vtag_block[i].lport == lport) &&
4558                             (twait_block->vtag_block[i].rport == rport)) {
4559                                 found = 1;
4560                                 break;
4561                         }
4562                 }
4563                 if (found)
4564                         break;
4565         }
4566         SCTP_INP_INFO_WUNLOCK();
4567         return (found);
4568 }
4569
4570
4571 void
4572 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4573 {
4574         struct sctpvtaghead *chain;
4575         struct sctp_tagblock *twait_block;
4576         struct timeval now;
4577         int set, i;
4578
4579         if (time == 0) {
4580                 /* Its disabled */
4581                 return;
4582         }
4583         (void)SCTP_GETTIME_TIMEVAL(&now);
4584         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4585         set = 0;
4586         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4587                 /* Block(s) present, lets find space, and expire on the fly */
4588                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4589                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4590                             !set) {
4591                                 twait_block->vtag_block[i].tv_sec_at_expire =
4592                                     now.tv_sec + time;
4593                                 twait_block->vtag_block[i].v_tag = tag;
4594                                 twait_block->vtag_block[i].lport = lport;
4595                                 twait_block->vtag_block[i].rport = rport;
4596                                 set = 1;
4597                         } else if ((twait_block->vtag_block[i].v_tag) &&
4598                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4599                                 /* Audit expires this guy */
4600                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4601                                 twait_block->vtag_block[i].v_tag = 0;
4602                                 twait_block->vtag_block[i].lport = 0;
4603                                 twait_block->vtag_block[i].rport = 0;
4604                                 if (set == 0) {
4605                                         /* Reuse it for my new tag */
4606                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4607                                         twait_block->vtag_block[i].v_tag = tag;
4608                                         twait_block->vtag_block[i].lport = lport;
4609                                         twait_block->vtag_block[i].rport = rport;
4610                                         set = 1;
4611                                 }
4612                         }
4613                 }
4614                 if (set) {
4615                         /*
4616                          * We only do up to the block where we can place our
4617                          * tag for audits
4618                          */
4619                         break;
4620                 }
4621         }
4622         /* Need to add a new block to chain */
4623         if (!set) {
4624                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4625                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4626                 if (twait_block == NULL) {
4627                         return;
4628                 }
4629                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4630                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4631                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4632                 twait_block->vtag_block[0].v_tag = tag;
4633                 twait_block->vtag_block[0].lport = lport;
4634                 twait_block->vtag_block[0].rport = rport;
4635         }
4636 }
4637
4638 void
4639 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4640 {
4641         struct sctp_tmit_chunk *chk, *nchk;
4642         struct sctp_queued_to_read *control, *ncontrol;
4643
4644         TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) {
4645                 TAILQ_REMOVE(rh, control, next_instrm);
4646                 control->on_strm_q = 0;
4647                 if (control->on_read_q == 0) {
4648                         sctp_free_remote_addr(control->whoFrom);
4649                         if (control->data) {
4650                                 sctp_m_freem(control->data);
4651                                 control->data = NULL;
4652                         }
4653                 }
4654                 /* Reassembly free? */
4655                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
4656                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
4657                         if (chk->data) {
4658                                 sctp_m_freem(chk->data);
4659                                 chk->data = NULL;
4660                         }
4661                         if (chk->holds_key_ref)
4662                                 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4663                         sctp_free_remote_addr(chk->whoTo);
4664                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4665                         SCTP_DECR_CHK_COUNT();
4666                         /* sa_ignore FREED_MEMORY */
4667                 }
4668                 /*
4669                  * We don't free the address here since all the net's were
4670                  * freed above.
4671                  */
4672                 if (control->on_read_q == 0) {
4673                         sctp_free_a_readq(stcb, control);
4674                 }
4675         }
4676 }
4677
4678
4679 /*-
4680  * Free the association after un-hashing the remote port. This
4681  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4682  * expect that the input to this function IS a locked TCB.
4683  * It will return 0, if it did NOT destroy the association (instead
4684  * it unlocks it. It will return NON-zero if it either destroyed the
4685  * association OR the association is already destroyed.
4686  */
4687 int
4688 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4689 {
4690         int i;
4691         struct sctp_association *asoc;
4692         struct sctp_nets *net, *nnet;
4693         struct sctp_laddr *laddr, *naddr;
4694         struct sctp_tmit_chunk *chk, *nchk;
4695         struct sctp_asconf_addr *aparam, *naparam;
4696         struct sctp_asconf_ack *aack, *naack;
4697         struct sctp_stream_reset_list *strrst, *nstrrst;
4698         struct sctp_queued_to_read *sq, *nsq;
4699         struct sctp_stream_queue_pending *sp, *nsp;
4700         sctp_sharedkey_t *shared_key, *nshared_key;
4701         struct socket *so;
4702
4703         /* first, lets purge the entry from the hash table. */
4704
4705 #ifdef SCTP_LOG_CLOSING
4706         sctp_log_closing(inp, stcb, 6);
4707 #endif
4708         if (stcb->asoc.state == 0) {
4709 #ifdef SCTP_LOG_CLOSING
4710                 sctp_log_closing(inp, NULL, 7);
4711 #endif
4712                 /* there is no asoc, really TSNH :-0 */
4713                 return (1);
4714         }
4715         if (stcb->asoc.alternate) {
4716                 sctp_free_remote_addr(stcb->asoc.alternate);
4717                 stcb->asoc.alternate = NULL;
4718         }
4719         /* TEMP CODE */
4720         if (stcb->freed_from_where == 0) {
4721                 /* Only record the first place free happened from */
4722                 stcb->freed_from_where = from_location;
4723         }
4724         /* TEMP CODE */
4725
4726         asoc = &stcb->asoc;
4727         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4728             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4729                 /* nothing around */
4730                 so = NULL;
4731         else
4732                 so = inp->sctp_socket;
4733
4734         /*
4735          * We used timer based freeing if a reader or writer is in the way.
4736          * So we first check if we are actually being called from a timer,
4737          * if so we abort early if a reader or writer is still in the way.
4738          */
4739         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4740             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4741                 /*
4742                  * is it the timer driving us? if so are the reader/writers
4743                  * gone?
4744                  */
4745                 if (stcb->asoc.refcnt) {
4746                         /* nope, reader or writer in the way */
4747                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4748                         /* no asoc destroyed */
4749                         SCTP_TCB_UNLOCK(stcb);
4750 #ifdef SCTP_LOG_CLOSING
4751                         sctp_log_closing(inp, stcb, 8);
4752 #endif
4753                         return (0);
4754                 }
4755         }
4756         /* Now clean up any other timers */
4757         sctp_stop_association_timers(stcb, false);
4758         /* Now the read queue needs to be cleaned up (only once) */
4759         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4760                 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED);
4761                 SCTP_INP_READ_LOCK(inp);
4762                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4763                         if (sq->stcb == stcb) {
4764                                 sq->do_not_ref_stcb = 1;
4765                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4766                                 /*
4767                                  * If there is no end, there never will be
4768                                  * now.
4769                                  */
4770                                 if (sq->end_added == 0) {
4771                                         /* Held for PD-API clear that. */
4772                                         sq->pdapi_aborted = 1;
4773                                         sq->held_length = 0;
4774                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4775                                                 /*
4776                                                  * Need to add a PD-API
4777                                                  * aborted indication.
4778                                                  * Setting the control_pdapi
4779                                                  * assures that it will be
4780                                                  * added right after this
4781                                                  * msg.
4782                                                  */
4783                                                 uint32_t strseq;
4784
4785                                                 stcb->asoc.control_pdapi = sq;
4786                                                 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff);
4787                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4788                                                     stcb,
4789                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4790                                                     (void *)&strseq,
4791                                                     SCTP_SO_LOCKED);
4792                                                 stcb->asoc.control_pdapi = NULL;
4793                                         }
4794                                 }
4795                                 /* Add an end to wake them */
4796                                 sq->end_added = 1;
4797                         }
4798                 }
4799                 SCTP_INP_READ_UNLOCK(inp);
4800                 if (stcb->block_entry) {
4801                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4802                         stcb->block_entry->error = ECONNRESET;
4803                         stcb->block_entry = NULL;
4804                 }
4805         }
4806         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4807                 /*
4808                  * Someone holds a reference OR the socket is unaccepted
4809                  * yet.
4810                  */
4811                 if ((stcb->asoc.refcnt) ||
4812                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4813                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4814                         SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4815                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4816                 }
4817                 SCTP_TCB_UNLOCK(stcb);
4818                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4819                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4820                         /* nothing around */
4821                         so = NULL;
4822                 if (so) {
4823                         /* Wake any reader/writers */
4824                         sctp_sorwakeup(inp, so);
4825                         sctp_sowwakeup(inp, so);
4826                 }
4827
4828 #ifdef SCTP_LOG_CLOSING
4829                 sctp_log_closing(inp, stcb, 9);
4830 #endif
4831                 /* no asoc destroyed */
4832                 return (0);
4833         }
4834 #ifdef SCTP_LOG_CLOSING
4835         sctp_log_closing(inp, stcb, 10);
4836 #endif
4837         /*
4838          * When I reach here, no others want to kill the assoc yet.. and I
4839          * own the lock. Now its possible an abort comes in when I do the
4840          * lock exchange below to grab all the locks to do the final take
4841          * out. to prevent this we increment the count, which will start a
4842          * timer and blow out above thus assuring us that we hold exclusive
4843          * killing of the asoc. Note that after getting back the TCB lock we
4844          * will go ahead and increment the counter back up and stop any
4845          * timer a passing stranger may have started :-S
4846          */
4847         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4848                 atomic_add_int(&stcb->asoc.refcnt, 1);
4849
4850                 SCTP_TCB_UNLOCK(stcb);
4851                 SCTP_INP_INFO_WLOCK();
4852                 SCTP_INP_WLOCK(inp);
4853                 SCTP_TCB_LOCK(stcb);
4854         }
4855         /* Double check the GONE flag */
4856         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4857             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4858                 /* nothing around */
4859                 so = NULL;
4860
4861         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4862             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4863                 /*
4864                  * For TCP type we need special handling when we are
4865                  * connected. We also include the peel'ed off ones to.
4866                  */
4867                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4868                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4869                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4870                         if (so) {
4871                                 SOCKBUF_LOCK(&so->so_rcv);
4872                                 so->so_state &= ~(SS_ISCONNECTING |
4873                                     SS_ISDISCONNECTING |
4874                                     SS_ISCONFIRMING |
4875                                     SS_ISCONNECTED);
4876                                 so->so_state |= SS_ISDISCONNECTED;
4877                                 socantrcvmore_locked(so);
4878                                 socantsendmore(so);
4879                                 sctp_sowwakeup(inp, so);
4880                                 sctp_sorwakeup(inp, so);
4881                                 SCTP_SOWAKEUP(so);
4882                         }
4883                 }
4884         }
4885
4886         /*
4887          * Make it invalid too, that way if its about to run it will abort
4888          * and return.
4889          */
4890         /* re-increment the lock */
4891         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4892                 atomic_add_int(&stcb->asoc.refcnt, -1);
4893         }
4894         if (stcb->asoc.refcnt) {
4895                 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4896                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4897                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4898                         SCTP_INP_INFO_WUNLOCK();
4899                         SCTP_INP_WUNLOCK(inp);
4900                 }
4901                 SCTP_TCB_UNLOCK(stcb);
4902                 return (0);
4903         }
4904         asoc->state = 0;
4905         if (inp->sctp_tcbhash) {
4906                 LIST_REMOVE(stcb, sctp_tcbhash);
4907         }
4908         if (stcb->asoc.in_asocid_hash) {
4909                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4910         }
4911         /* Now lets remove it from the list of ALL associations in the EP */
4912         LIST_REMOVE(stcb, sctp_tcblist);
4913         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4914                 SCTP_INP_INCR_REF(inp);
4915                 SCTP_INP_WUNLOCK(inp);
4916         }
4917         /* pull from vtag hash */
4918         LIST_REMOVE(stcb, sctp_asocs);
4919         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4920             inp->sctp_lport, stcb->rport);
4921
4922         /*
4923          * Now restop the timers to be sure this is paranoia at is finest!
4924          */
4925         sctp_stop_association_timers(stcb, true);
4926
4927         /*
4928          * The chunk lists and such SHOULD be empty but we check them just
4929          * in case.
4930          */
4931         /* anything on the wheel needs to be removed */
4932         SCTP_TCB_SEND_LOCK(stcb);
4933         for (i = 0; i < asoc->streamoutcnt; i++) {
4934                 struct sctp_stream_out *outs;
4935
4936                 outs = &asoc->strmout[i];
4937                 /* now clean up any chunks here */
4938                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4939                         atomic_subtract_int(&asoc->stream_queue_cnt, 1);
4940                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4941                         stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1);
4942                         sctp_free_spbufspace(stcb, asoc, sp);
4943                         if (sp->data) {
4944                                 if (so) {
4945                                         /* Still an open socket - report */
4946                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4947                                             0, (void *)sp, SCTP_SO_LOCKED);
4948                                 }
4949                                 if (sp->data) {
4950                                         sctp_m_freem(sp->data);
4951                                         sp->data = NULL;
4952                                         sp->tail_mbuf = NULL;
4953                                         sp->length = 0;
4954                                 }
4955                         }
4956                         if (sp->net) {
4957                                 sctp_free_remote_addr(sp->net);
4958                                 sp->net = NULL;
4959                         }
4960                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4961                 }
4962         }
4963         SCTP_TCB_SEND_UNLOCK(stcb);
4964         /* sa_ignore FREED_MEMORY */
4965         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4966                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4967                 SCTP_FREE(strrst, SCTP_M_STRESET);
4968         }
4969         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4970                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4971                 if (sq->data) {
4972                         sctp_m_freem(sq->data);
4973                         sq->data = NULL;
4974                 }
4975                 sctp_free_remote_addr(sq->whoFrom);
4976                 sq->whoFrom = NULL;
4977                 sq->stcb = NULL;
4978                 /* Free the ctl entry */
4979                 sctp_free_a_readq(stcb, sq);
4980                 /* sa_ignore FREED_MEMORY */
4981         }
4982         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4983                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4984                 if (chk->data) {
4985                         sctp_m_freem(chk->data);
4986                         chk->data = NULL;
4987                 }
4988                 if (chk->holds_key_ref)
4989                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4990                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4991                 SCTP_DECR_CHK_COUNT();
4992                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4993                 asoc->free_chunk_cnt--;
4994                 /* sa_ignore FREED_MEMORY */
4995         }
4996         /* pending send queue SHOULD be empty */
4997         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4998                 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
4999                         asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5000 #ifdef INVARIANTS
5001                 } else {
5002                         panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5003 #endif
5004                 }
5005                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5006                 if (chk->data) {
5007                         if (so) {
5008                                 /* Still a socket? */
5009                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5010                                     0, chk, SCTP_SO_LOCKED);
5011                         }
5012                         if (chk->data) {
5013                                 sctp_m_freem(chk->data);
5014                                 chk->data = NULL;
5015                         }
5016                 }
5017                 if (chk->holds_key_ref)
5018                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5019                 if (chk->whoTo) {
5020                         sctp_free_remote_addr(chk->whoTo);
5021                         chk->whoTo = NULL;
5022                 }
5023                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5024                 SCTP_DECR_CHK_COUNT();
5025                 /* sa_ignore FREED_MEMORY */
5026         }
5027         /* sent queue SHOULD be empty */
5028         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5029                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5030                         if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5031                                 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5032 #ifdef INVARIANTS
5033                         } else {
5034                                 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5035 #endif
5036                         }
5037                 }
5038                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5039                 if (chk->data) {
5040                         if (so) {
5041                                 /* Still a socket? */
5042                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5043                                     0, chk, SCTP_SO_LOCKED);
5044                         }
5045                         if (chk->data) {
5046                                 sctp_m_freem(chk->data);
5047                                 chk->data = NULL;
5048                         }
5049                 }
5050                 if (chk->holds_key_ref)
5051                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5052                 sctp_free_remote_addr(chk->whoTo);
5053                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5054                 SCTP_DECR_CHK_COUNT();
5055                 /* sa_ignore FREED_MEMORY */
5056         }
5057 #ifdef INVARIANTS
5058         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5059                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5060                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5061                 }
5062         }
5063 #endif
5064         /* control queue MAY not be empty */
5065         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5066                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5067                 if (chk->data) {
5068                         sctp_m_freem(chk->data);
5069                         chk->data = NULL;
5070                 }
5071                 if (chk->holds_key_ref)
5072                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5073                 sctp_free_remote_addr(chk->whoTo);
5074                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5075                 SCTP_DECR_CHK_COUNT();
5076                 /* sa_ignore FREED_MEMORY */
5077         }
5078         /* ASCONF queue MAY not be empty */
5079         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5080                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5081                 if (chk->data) {
5082                         sctp_m_freem(chk->data);
5083                         chk->data = NULL;
5084                 }
5085                 if (chk->holds_key_ref)
5086                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5087                 sctp_free_remote_addr(chk->whoTo);
5088                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5089                 SCTP_DECR_CHK_COUNT();
5090                 /* sa_ignore FREED_MEMORY */
5091         }
5092         if (asoc->mapping_array) {
5093                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5094                 asoc->mapping_array = NULL;
5095         }
5096         if (asoc->nr_mapping_array) {
5097                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5098                 asoc->nr_mapping_array = NULL;
5099         }
5100         /* the stream outs */
5101         if (asoc->strmout) {
5102                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5103                 asoc->strmout = NULL;
5104         }
5105         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5106         if (asoc->strmin) {
5107                 for (i = 0; i < asoc->streamincnt; i++) {
5108                         sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5109                         sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5110                 }
5111                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5112                 asoc->strmin = NULL;
5113         }
5114         asoc->streamincnt = 0;
5115         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5116 #ifdef INVARIANTS
5117                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5118                         panic("no net's left alloc'ed, or list points to itself");
5119                 }
5120 #endif
5121                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5122                 sctp_free_remote_addr(net);
5123         }
5124         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5125                 /* sa_ignore FREED_MEMORY */
5126                 sctp_remove_laddr(laddr);
5127         }
5128
5129         /* pending asconf (address) parameters */
5130         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5131                 /* sa_ignore FREED_MEMORY */
5132                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5133                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5134         }
5135         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5136                 /* sa_ignore FREED_MEMORY */
5137                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5138                 if (aack->data != NULL) {
5139                         sctp_m_freem(aack->data);
5140                 }
5141                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5142         }
5143         /* clean up auth stuff */
5144         if (asoc->local_hmacs)
5145                 sctp_free_hmaclist(asoc->local_hmacs);
5146         if (asoc->peer_hmacs)
5147                 sctp_free_hmaclist(asoc->peer_hmacs);
5148
5149         if (asoc->local_auth_chunks)
5150                 sctp_free_chunklist(asoc->local_auth_chunks);
5151         if (asoc->peer_auth_chunks)
5152                 sctp_free_chunklist(asoc->peer_auth_chunks);
5153
5154         sctp_free_authinfo(&asoc->authinfo);
5155
5156         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5157                 LIST_REMOVE(shared_key, next);
5158                 sctp_free_sharedkey(shared_key);
5159                 /* sa_ignore FREED_MEMORY */
5160         }
5161
5162         /* Insert new items here :> */
5163
5164         /* Get rid of LOCK */
5165         SCTP_TCB_UNLOCK(stcb);
5166         SCTP_TCB_LOCK_DESTROY(stcb);
5167         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5168         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5169                 SCTP_INP_INFO_WUNLOCK();
5170                 SCTP_INP_RLOCK(inp);
5171         }
5172 #ifdef SCTP_TRACK_FREED_ASOCS
5173         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5174                 /* now clean up the tasoc itself */
5175                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5176                 SCTP_DECR_ASOC_COUNT();
5177         } else {
5178                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5179         }
5180 #else
5181         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5182         SCTP_DECR_ASOC_COUNT();
5183 #endif
5184         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5185                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5186                         /*
5187                          * If its NOT the inp_free calling us AND sctp_close
5188                          * as been called, we call back...
5189                          */
5190                         SCTP_INP_RUNLOCK(inp);
5191                         /*
5192                          * This will start the kill timer (if we are the
5193                          * last one) since we hold an increment yet. But
5194                          * this is the only safe way to do this since
5195                          * otherwise if the socket closes at the same time
5196                          * we are here we might collide in the cleanup.
5197                          */
5198                         sctp_inpcb_free(inp,
5199                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5200                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5201                         SCTP_INP_DECR_REF(inp);
5202                 } else {
5203                         /* The socket is still open. */
5204                         SCTP_INP_DECR_REF(inp);
5205                         SCTP_INP_RUNLOCK(inp);
5206                 }
5207         }
5208         /* destroyed the asoc */
5209 #ifdef SCTP_LOG_CLOSING
5210         sctp_log_closing(inp, NULL, 11);
5211 #endif
5212         return (1);
5213 }
5214
5215
5216
5217 /*
5218  * determine if a destination is "reachable" based upon the addresses bound
5219  * to the current endpoint (e.g. only v4 or v6 currently bound)
5220  */
5221 /*
5222  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5223  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5224  * types bound as its endpoint
5225  */
5226 int
5227 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5228 {
5229         struct sctp_inpcb *inp;
5230         int answer;
5231
5232         /*
5233          * No locks here, the TCB, in all cases is already locked and an
5234          * assoc is up. There is either a INP lock by the caller applied (in
5235          * asconf case when deleting an address) or NOT in the HB case,
5236          * however if HB then the INP increment is up and the INP will not
5237          * be removed (on top of the fact that we have a TCB lock). So we
5238          * only want to read the sctp_flags, which is either bound-all or
5239          * not.. no protection needed since once an assoc is up you can't be
5240          * changing your binding.
5241          */
5242         inp = stcb->sctp_ep;
5243         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5244                 /* if bound all, destination is not restricted */
5245                 /*
5246                  * RRS: Question during lock work: Is this correct? If you
5247                  * are bound-all you still might need to obey the V4--V6
5248                  * flags??? IMO this bound-all stuff needs to be removed!
5249                  */
5250                 return (1);
5251         }
5252         /* NOTE: all "scope" checks are done when local addresses are added */
5253         switch (destaddr->sa_family) {
5254 #ifdef INET6
5255         case AF_INET6:
5256                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5257                 break;
5258 #endif
5259 #ifdef INET
5260         case AF_INET:
5261                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5262                 break;
5263 #endif
5264         default:
5265                 /* invalid family, so it's unreachable */
5266                 answer = 0;
5267                 break;
5268         }
5269         return (answer);
5270 }
5271
5272 /*
5273  * update the inp_vflags on an endpoint
5274  */
5275 static void
5276 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5277 {
5278         struct sctp_laddr *laddr;
5279
5280         /* first clear the flag */
5281         inp->ip_inp.inp.inp_vflag = 0;
5282         /* set the flag based on addresses on the ep list */
5283         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5284                 if (laddr->ifa == NULL) {
5285                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5286                             __func__);
5287                         continue;
5288                 }
5289
5290                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5291                         continue;
5292                 }
5293                 switch (laddr->ifa->address.sa.sa_family) {
5294 #ifdef INET6
5295                 case AF_INET6:
5296                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5297                         break;
5298 #endif
5299 #ifdef INET
5300                 case AF_INET:
5301                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5302                         break;
5303 #endif
5304                 default:
5305                         break;
5306                 }
5307         }
5308 }
5309
5310 /*
5311  * Add the address to the endpoint local address list There is nothing to be
5312  * done if we are bound to all addresses
5313  */
5314 void
5315 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5316 {
5317         struct sctp_laddr *laddr;
5318         struct sctp_tcb *stcb;
5319         int fnd, error = 0;
5320
5321         fnd = 0;
5322
5323         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5324                 /* You are already bound to all. You have it already */
5325                 return;
5326         }
5327 #ifdef INET6
5328         if (ifa->address.sa.sa_family == AF_INET6) {
5329                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5330                         /* Can't bind a non-useable addr. */
5331                         return;
5332                 }
5333         }
5334 #endif
5335         /* first, is it already present? */
5336         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5337                 if (laddr->ifa == ifa) {
5338                         fnd = 1;
5339                         break;
5340                 }
5341         }
5342
5343         if (fnd == 0) {
5344                 /* Not in the ep list */
5345                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5346                 if (error != 0)
5347                         return;
5348                 inp->laddr_count++;
5349                 /* update inp_vflag flags */
5350                 switch (ifa->address.sa.sa_family) {
5351 #ifdef INET6
5352                 case AF_INET6:
5353                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5354                         break;
5355 #endif
5356 #ifdef INET
5357                 case AF_INET:
5358                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5359                         break;
5360 #endif
5361                 default:
5362                         break;
5363                 }
5364                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5365                         sctp_add_local_addr_restricted(stcb, ifa);
5366                 }
5367         }
5368         return;
5369 }
5370
5371
5372 /*
5373  * select a new (hopefully reachable) destination net (should only be used
5374  * when we deleted an ep addr that is the only usable source address to reach
5375  * the destination net)
5376  */
5377 static void
5378 sctp_select_primary_destination(struct sctp_tcb *stcb)
5379 {
5380         struct sctp_nets *net;
5381
5382         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5383                 /* for now, we'll just pick the first reachable one we find */
5384                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5385                         continue;
5386                 if (sctp_destination_is_reachable(stcb,
5387                     (struct sockaddr *)&net->ro._l_addr)) {
5388                         /* found a reachable destination */
5389                         stcb->asoc.primary_destination = net;
5390                 }
5391         }
5392         /* I can't there from here! ...we're gonna die shortly... */
5393 }
5394
5395
5396 /*
5397  * Delete the address from the endpoint local address list. There is nothing
5398  * to be done if we are bound to all addresses
5399  */
5400 void
5401 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5402 {
5403         struct sctp_laddr *laddr;
5404         int fnd;
5405
5406         fnd = 0;
5407         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5408                 /* You are already bound to all. You have it already */
5409                 return;
5410         }
5411         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5412                 if (laddr->ifa == ifa) {
5413                         fnd = 1;
5414                         break;
5415                 }
5416         }
5417         if (fnd && (inp->laddr_count < 2)) {
5418                 /* can't delete unless there are at LEAST 2 addresses */
5419                 return;
5420         }
5421         if (fnd) {
5422                 /*
5423                  * clean up any use of this address go through our
5424                  * associations and clear any last_used_address that match
5425                  * this one for each assoc, see if a new primary_destination
5426                  * is needed
5427                  */
5428                 struct sctp_tcb *stcb;
5429
5430                 /* clean up "next_addr_touse" */
5431                 if (inp->next_addr_touse == laddr)
5432                         /* delete this address */
5433                         inp->next_addr_touse = NULL;
5434
5435                 /* clean up "last_used_address" */
5436                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5437                         struct sctp_nets *net;
5438
5439                         SCTP_TCB_LOCK(stcb);
5440                         if (stcb->asoc.last_used_address == laddr)
5441                                 /* delete this address */
5442                                 stcb->asoc.last_used_address = NULL;
5443                         /*
5444                          * Now spin through all the nets and purge any ref
5445                          * to laddr
5446                          */
5447                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5448                                 if (net->ro._s_addr == laddr->ifa) {
5449                                         /* Yep, purge src address selected */
5450                                         RO_NHFREE(&net->ro);
5451                                         sctp_free_ifa(net->ro._s_addr);
5452                                         net->ro._s_addr = NULL;
5453                                         net->src_addr_selected = 0;
5454                                 }
5455                         }
5456                         SCTP_TCB_UNLOCK(stcb);
5457                 }               /* for each tcb */
5458                 /* remove it from the ep list */
5459                 sctp_remove_laddr(laddr);
5460                 inp->laddr_count--;
5461                 /* update inp_vflag flags */
5462                 sctp_update_ep_vflag(inp);
5463         }
5464         return;
5465 }
5466
5467 /*
5468  * Add the address to the TCB local address restricted list.
5469  * This is a "pending" address list (eg. addresses waiting for an
5470  * ASCONF-ACK response) and cannot be used as a valid source address.
5471  */
5472 void
5473 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5474 {
5475         struct sctp_laddr *laddr;
5476         struct sctpladdr *list;
5477
5478         /*
5479          * Assumes TCB is locked.. and possibly the INP. May need to
5480          * confirm/fix that if we need it and is not the case.
5481          */
5482         list = &stcb->asoc.sctp_restricted_addrs;
5483
5484 #ifdef INET6
5485         if (ifa->address.sa.sa_family == AF_INET6) {
5486                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5487                         /* Can't bind a non-existent addr. */
5488                         return;
5489                 }
5490         }
5491 #endif
5492         /* does the address already exist? */
5493         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5494                 if (laddr->ifa == ifa) {
5495                         return;
5496                 }
5497         }
5498
5499         /* add to the list */
5500         (void)sctp_insert_laddr(list, ifa, 0);
5501         return;
5502 }
5503
5504 /*
5505  * Remove a local address from the TCB local address restricted list
5506  */
5507 void
5508 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5509 {
5510         struct sctp_inpcb *inp;
5511         struct sctp_laddr *laddr;
5512
5513         /*
5514          * This is called by asconf work. It is assumed that a) The TCB is
5515          * locked and b) The INP is locked. This is true in as much as I can
5516          * trace through the entry asconf code where I did these locks.
5517          * Again, the ASCONF code is a bit different in that it does lock
5518          * the INP during its work often times. This must be since we don't
5519          * want other proc's looking up things while what they are looking
5520          * up is changing :-D
5521          */
5522
5523         inp = stcb->sctp_ep;
5524         /* if subset bound and don't allow ASCONF's, can't delete last */
5525         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5526             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5527                 if (stcb->sctp_ep->laddr_count < 2) {
5528                         /* can't delete last address */
5529                         return;
5530                 }
5531         }
5532         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5533                 /* remove the address if it exists */
5534                 if (laddr->ifa == NULL)
5535                         continue;
5536                 if (laddr->ifa == ifa) {
5537                         sctp_remove_laddr(laddr);
5538                         return;
5539                 }
5540         }
5541
5542         /* address not found! */
5543         return;
5544 }
5545
5546 /*
5547  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5548  */
5549 /* sysctl */
5550 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5551 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5552
5553
5554
5555 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5556 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5557 int *sctp_cpuarry = NULL;
5558 void
5559 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5560 {
5561         /* Queue a packet to a processor for the specified core */
5562         struct sctp_mcore_queue *qent;
5563         struct sctp_mcore_ctrl *wkq;
5564         int need_wake = 0;
5565
5566         if (sctp_mcore_workers == NULL) {
5567                 /* Something went way bad during setup */
5568                 sctp_input_with_port(m, off, 0);
5569                 return;
5570         }
5571         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5572             (sizeof(struct sctp_mcore_queue)),
5573             SCTP_M_MCORE);
5574         if (qent == NULL) {
5575                 /* This is trouble  */
5576                 sctp_input_with_port(m, off, 0);
5577                 return;
5578         }
5579         qent->vn = curvnet;
5580         qent->m = m;
5581         qent->off = off;
5582         qent->v6 = 0;
5583         wkq = &sctp_mcore_workers[cpu_to_use];
5584         SCTP_MCORE_QLOCK(wkq);
5585
5586         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5587         if (wkq->running == 0) {
5588                 need_wake = 1;
5589         }
5590         SCTP_MCORE_QUNLOCK(wkq);
5591         if (need_wake) {
5592                 wakeup(&wkq->running);
5593         }
5594 }
5595
5596 static void
5597 sctp_mcore_thread(void *arg)
5598 {
5599
5600         struct sctp_mcore_ctrl *wkq;
5601         struct sctp_mcore_queue *qent;
5602
5603         wkq = (struct sctp_mcore_ctrl *)arg;
5604         struct mbuf *m;
5605         int off, v6;
5606
5607         /* Wait for first tickle */
5608         SCTP_MCORE_LOCK(wkq);
5609         wkq->running = 0;
5610         msleep(&wkq->running,
5611             &wkq->core_mtx,
5612             0, "wait for pkt", 0);
5613         SCTP_MCORE_UNLOCK(wkq);
5614
5615         /* Bind to our cpu */
5616         thread_lock(curthread);
5617         sched_bind(curthread, wkq->cpuid);
5618         thread_unlock(curthread);
5619
5620         /* Now lets start working */
5621         SCTP_MCORE_LOCK(wkq);
5622         /* Now grab lock and go */
5623         for (;;) {
5624                 SCTP_MCORE_QLOCK(wkq);
5625 skip_sleep:
5626                 wkq->running = 1;
5627                 qent = TAILQ_FIRST(&wkq->que);
5628                 if (qent) {
5629                         TAILQ_REMOVE(&wkq->que, qent, next);
5630                         SCTP_MCORE_QUNLOCK(wkq);
5631                         CURVNET_SET(qent->vn);
5632                         m = qent->m;
5633                         off = qent->off;
5634                         v6 = qent->v6;
5635                         SCTP_FREE(qent, SCTP_M_MCORE);
5636                         if (v6 == 0) {
5637                                 sctp_input_with_port(m, off, 0);
5638                         } else {
5639                                 SCTP_PRINTF("V6 not yet supported\n");
5640                                 sctp_m_freem(m);
5641                         }
5642                         CURVNET_RESTORE();
5643                         SCTP_MCORE_QLOCK(wkq);
5644                 }
5645                 wkq->running = 0;
5646                 if (!TAILQ_EMPTY(&wkq->que)) {
5647                         goto skip_sleep;
5648                 }
5649                 SCTP_MCORE_QUNLOCK(wkq);
5650                 msleep(&wkq->running,
5651                     &wkq->core_mtx,
5652                     0, "wait for pkt", 0);
5653         }
5654 }
5655
5656 static void
5657 sctp_startup_mcore_threads(void)
5658 {
5659         int i, cpu;
5660
5661         if (mp_ncpus == 1)
5662                 return;
5663
5664         if (sctp_mcore_workers != NULL) {
5665                 /*
5666                  * Already been here in some previous vnet?
5667                  */
5668                 return;
5669         }
5670         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5671             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5672             SCTP_M_MCORE);
5673         if (sctp_mcore_workers == NULL) {
5674                 /* TSNH I hope */
5675                 return;
5676         }
5677         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5678             sizeof(struct sctp_mcore_ctrl)));
5679         /* Init the structures */
5680         for (i = 0; i <= mp_maxid; i++) {
5681                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5682                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5683                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5684                 sctp_mcore_workers[i].cpuid = i;
5685         }
5686         if (sctp_cpuarry == NULL) {
5687                 SCTP_MALLOC(sctp_cpuarry, int *,
5688                     (mp_ncpus * sizeof(int)),
5689                     SCTP_M_MCORE);
5690                 i = 0;
5691                 CPU_FOREACH(cpu) {
5692                         sctp_cpuarry[i] = cpu;
5693                         i++;
5694                 }
5695         }
5696
5697         /* Now start them all */
5698         CPU_FOREACH(cpu) {
5699                 (void)kproc_create(sctp_mcore_thread,
5700                     (void *)&sctp_mcore_workers[cpu],
5701                     &sctp_mcore_workers[cpu].thread_proc,
5702                     RFPROC,
5703                     SCTP_KTHREAD_PAGES,
5704                     SCTP_MCORE_NAME);
5705
5706         }
5707 }
5708 #endif
5709
5710 void
5711 sctp_pcb_init(void)
5712 {
5713         /*
5714          * SCTP initialization for the PCB structures should be called by
5715          * the sctp_init() function.
5716          */
5717         int i;
5718         struct timeval tv;
5719
5720         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5721                 /* error I was called twice */
5722                 return;
5723         }
5724         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5725
5726 #if defined(SCTP_LOCAL_TRACE_BUF)
5727         memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log));
5728 #endif
5729 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5730         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5731             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5732             SCTP_M_MCORE);
5733 #endif
5734         (void)SCTP_GETTIME_TIMEVAL(&tv);
5735 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5736         memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1));
5737         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
5738         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
5739 #else
5740         memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat));
5741         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
5742         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
5743 #endif
5744         /* init the empty list of (All) Endpoints */
5745         LIST_INIT(&SCTP_BASE_INFO(listhead));
5746
5747
5748         /* init the hash table of endpoints */
5749         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5750         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5751         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5752         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5753             &SCTP_BASE_INFO(hashasocmark));
5754         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5755             &SCTP_BASE_INFO(hashmark));
5756         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5757             &SCTP_BASE_INFO(hashtcpmark));
5758         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5759
5760
5761         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5762             &SCTP_BASE_INFO(hashvrfmark));
5763
5764         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5765             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5766         /* init the zones */
5767         /*
5768          * FIX ME: Should check for NULL returns, but if it does fail we are
5769          * doomed to panic anyways... add later maybe.
5770          */
5771         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5772             sizeof(struct sctp_inpcb), maxsockets);
5773
5774         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5775             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5776
5777         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5778             sizeof(struct sctp_laddr),
5779             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5780
5781         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5782             sizeof(struct sctp_nets),
5783             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5784
5785         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5786             sizeof(struct sctp_tmit_chunk),
5787             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5788
5789         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5790             sizeof(struct sctp_queued_to_read),
5791             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5792
5793         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5794             sizeof(struct sctp_stream_queue_pending),
5795             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5796
5797         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5798             sizeof(struct sctp_asconf),
5799             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5800
5801         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5802             sizeof(struct sctp_asconf_ack),
5803             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5804
5805
5806         /* Master Lock INIT for info structure */
5807         SCTP_INP_INFO_LOCK_INIT();
5808         SCTP_STATLOG_INIT_LOCK();
5809
5810         SCTP_IPI_COUNT_INIT();
5811         SCTP_IPI_ADDR_INIT();
5812 #ifdef SCTP_PACKET_LOGGING
5813         SCTP_IP_PKTLOG_INIT();
5814 #endif
5815         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5816
5817         SCTP_WQ_ADDR_INIT();
5818         /* not sure if we need all the counts */
5819         SCTP_BASE_INFO(ipi_count_ep) = 0;
5820         /* assoc/tcb zone info */
5821         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5822         /* local addrlist zone info */
5823         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5824         /* remote addrlist zone info */
5825         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5826         /* chunk info */
5827         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5828
5829         /* socket queue zone info */
5830         SCTP_BASE_INFO(ipi_count_readq) = 0;
5831
5832         /* stream out queue cont */
5833         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5834
5835         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5836         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5837
5838         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5839
5840         /* Init the TIMEWAIT list */
5841         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5842                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5843         }
5844         sctp_startup_iterator();
5845
5846 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5847         sctp_startup_mcore_threads();
5848 #endif
5849
5850         /*
5851          * INIT the default VRF which for BSD is the only one, other O/S's
5852          * may have more. But initially they must start with one and then
5853          * add the VRF's as addresses are added.
5854          */
5855         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5856 }
5857
5858 /*
5859  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5860  */
5861 void
5862 sctp_pcb_finish(void)
5863 {
5864         struct sctp_vrflist *vrf_bucket;
5865         struct sctp_vrf *vrf, *nvrf;
5866         struct sctp_ifn *ifn, *nifn;
5867         struct sctp_ifa *ifa, *nifa;
5868         struct sctpvtaghead *chain;
5869         struct sctp_tagblock *twait_block, *prev_twait_block;
5870         struct sctp_laddr *wi, *nwi;
5871         int i;
5872         struct sctp_iterator *it, *nit;
5873
5874         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5875                 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5876                 return;
5877         }
5878         SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5879         /*
5880          * In FreeBSD the iterator thread never exits but we do clean up.
5881          * The only way FreeBSD reaches here is if we have VRF's but we
5882          * still add the ifdef to make it compile on old versions.
5883          */
5884 retry:
5885         SCTP_IPI_ITERATOR_WQ_LOCK();
5886         /*
5887          * sctp_iterator_worker() might be working on an it entry without
5888          * holding the lock.  We won't find it on the list either and
5889          * continue and free/destroy it.  While holding the lock, spin, to
5890          * avoid the race condition as sctp_iterator_worker() will have to
5891          * wait to re-aquire the lock.
5892          */
5893         if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5894                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5895                 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5896                     "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5897                 DELAY(10);
5898                 goto retry;
5899         }
5900         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5901                 if (it->vn != curvnet) {
5902                         continue;
5903                 }
5904                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5905                 if (it->function_atend != NULL) {
5906                         (*it->function_atend) (it->pointer, it->val);
5907                 }
5908                 SCTP_FREE(it, SCTP_M_ITER);
5909         }
5910         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5911         SCTP_ITERATOR_LOCK();
5912         if ((sctp_it_ctl.cur_it) &&
5913             (sctp_it_ctl.cur_it->vn == curvnet)) {
5914                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5915         }
5916         SCTP_ITERATOR_UNLOCK();
5917         SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5918         SCTP_WQ_ADDR_LOCK();
5919         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5920                 LIST_REMOVE(wi, sctp_nxt_addr);
5921                 SCTP_DECR_LADDR_COUNT();
5922                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5923                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
5924                 }
5925                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5926         }
5927         SCTP_WQ_ADDR_UNLOCK();
5928
5929         /*
5930          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5931          * destroyed first).
5932          */
5933         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5934         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5935                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5936                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5937                                 /* free the ifa */
5938                                 LIST_REMOVE(ifa, next_bucket);
5939                                 LIST_REMOVE(ifa, next_ifa);
5940                                 SCTP_FREE(ifa, SCTP_M_IFA);
5941                         }
5942                         /* free the ifn */
5943                         LIST_REMOVE(ifn, next_bucket);
5944                         LIST_REMOVE(ifn, next_ifn);
5945                         SCTP_FREE(ifn, SCTP_M_IFN);
5946                 }
5947                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5948                 /* free the vrf */
5949                 LIST_REMOVE(vrf, next_vrf);
5950                 SCTP_FREE(vrf, SCTP_M_VRF);
5951         }
5952         /* free the vrf hashes */
5953         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5954         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5955
5956         /*
5957          * free the TIMEWAIT list elements malloc'd in the function
5958          * sctp_add_vtag_to_timewait()...
5959          */
5960         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5961                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5962                 if (!LIST_EMPTY(chain)) {
5963                         prev_twait_block = NULL;
5964                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5965                                 if (prev_twait_block) {
5966                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5967                                 }
5968                                 prev_twait_block = twait_block;
5969                         }
5970                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5971                 }
5972         }
5973
5974         /* free the locks and mutexes */
5975 #ifdef SCTP_PACKET_LOGGING
5976         SCTP_IP_PKTLOG_DESTROY();
5977 #endif
5978         SCTP_IPI_ADDR_DESTROY();
5979         SCTP_STATLOG_DESTROY();
5980         SCTP_INP_INFO_LOCK_DESTROY();
5981
5982         SCTP_WQ_ADDR_DESTROY();
5983
5984         /* Get rid of other stuff too. */
5985         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5986                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5987         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5988                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5989         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5990                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5991
5992         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5993         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5994         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5995         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5996         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5997         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5998         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5999         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6000         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6001 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6002         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6003 #endif
6004 }
6005
6006
6007 int
6008 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6009     int offset, int limit,
6010     struct sockaddr *src, struct sockaddr *dst,
6011     struct sockaddr *altsa, uint16_t port)
6012 {
6013         /*
6014          * grub through the INIT pulling addresses and loading them to the
6015          * nets structure in the asoc. The from address in the mbuf should
6016          * also be loaded (if it is not already). This routine can be called
6017          * with either INIT or INIT-ACK's as long as the m points to the IP
6018          * packet and the offset points to the beginning of the parameters.
6019          */
6020         struct sctp_inpcb *inp;
6021         struct sctp_nets *net, *nnet, *net_tmp;
6022         struct sctp_paramhdr *phdr, param_buf;
6023         struct sctp_tcb *stcb_tmp;
6024         uint16_t ptype, plen;
6025         struct sockaddr *sa;
6026         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6027         struct sctp_auth_random *p_random = NULL;
6028         uint16_t random_len = 0;
6029         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6030         struct sctp_auth_hmac_algo *hmacs = NULL;
6031         uint16_t hmacs_len = 0;
6032         uint8_t saw_asconf = 0;
6033         uint8_t saw_asconf_ack = 0;
6034         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6035         struct sctp_auth_chunk_list *chunks = NULL;
6036         uint16_t num_chunks = 0;
6037         sctp_key_t *new_key;
6038         uint32_t keylen;
6039         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6040         uint8_t peer_supports_ecn;
6041         uint8_t peer_supports_prsctp;
6042         uint8_t peer_supports_auth;
6043         uint8_t peer_supports_asconf;
6044         uint8_t peer_supports_asconf_ack;
6045         uint8_t peer_supports_reconfig;
6046         uint8_t peer_supports_nrsack;
6047         uint8_t peer_supports_pktdrop;
6048         uint8_t peer_supports_idata;
6049 #ifdef INET
6050         struct sockaddr_in sin;
6051 #endif
6052 #ifdef INET6
6053         struct sockaddr_in6 sin6;
6054 #endif
6055
6056         /* First get the destination address setup too. */
6057 #ifdef INET
6058         memset(&sin, 0, sizeof(sin));
6059         sin.sin_family = AF_INET;
6060         sin.sin_len = sizeof(sin);
6061         sin.sin_port = stcb->rport;
6062 #endif
6063 #ifdef INET6
6064         memset(&sin6, 0, sizeof(sin6));
6065         sin6.sin6_family = AF_INET6;
6066         sin6.sin6_len = sizeof(struct sockaddr_in6);
6067         sin6.sin6_port = stcb->rport;
6068 #endif
6069         if (altsa) {
6070                 sa = altsa;
6071         } else {
6072                 sa = src;
6073         }
6074         peer_supports_idata = 0;
6075         peer_supports_ecn = 0;
6076         peer_supports_prsctp = 0;
6077         peer_supports_auth = 0;
6078         peer_supports_asconf = 0;
6079         peer_supports_reconfig = 0;
6080         peer_supports_nrsack = 0;
6081         peer_supports_pktdrop = 0;
6082         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6083                 /* mark all addresses that we have currently on the list */
6084                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6085         }
6086         /* does the source address already exist? if so skip it */
6087         inp = stcb->sctp_ep;
6088         atomic_add_int(&stcb->asoc.refcnt, 1);
6089         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6090         atomic_add_int(&stcb->asoc.refcnt, -1);
6091
6092         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6093                 /* we must add the source address */
6094                 /* no scope set here since we have a tcb already. */
6095                 switch (sa->sa_family) {
6096 #ifdef INET
6097                 case AF_INET:
6098                         if (stcb->asoc.scope.ipv4_addr_legal) {
6099                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6100                                         return (-1);
6101                                 }
6102                         }
6103                         break;
6104 #endif
6105 #ifdef INET6
6106                 case AF_INET6:
6107                         if (stcb->asoc.scope.ipv6_addr_legal) {
6108                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6109                                         return (-2);
6110                                 }
6111                         }
6112                         break;
6113 #endif
6114                 default:
6115                         break;
6116                 }
6117         } else {
6118                 if (net_tmp != NULL && stcb_tmp == stcb) {
6119                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6120                 } else if (stcb_tmp != stcb) {
6121                         /* It belongs to another association? */
6122                         if (stcb_tmp)
6123                                 SCTP_TCB_UNLOCK(stcb_tmp);
6124                         return (-3);
6125                 }
6126         }
6127         if (stcb->asoc.state == 0) {
6128                 /* the assoc was freed? */
6129                 return (-4);
6130         }
6131         /* now we must go through each of the params. */
6132         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
6133         while (phdr) {
6134                 ptype = ntohs(phdr->param_type);
6135                 plen = ntohs(phdr->param_length);
6136                 /*
6137                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6138                  * (uint32_t)ptype, (int)plen);
6139                  */
6140                 if (offset + plen > limit) {
6141                         break;
6142                 }
6143                 if (plen < sizeof(struct sctp_paramhdr)) {
6144                         break;
6145                 }
6146 #ifdef INET
6147                 if (ptype == SCTP_IPV4_ADDRESS) {
6148                         if (stcb->asoc.scope.ipv4_addr_legal) {
6149                                 struct sctp_ipv4addr_param *p4, p4_buf;
6150
6151                                 /* ok get the v4 address and check/add */
6152                                 phdr = sctp_get_next_param(m, offset,
6153                                     (struct sctp_paramhdr *)&p4_buf,
6154                                     sizeof(p4_buf));
6155                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6156                                     phdr == NULL) {
6157                                         return (-5);
6158                                 }
6159                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6160                                 sin.sin_addr.s_addr = p4->addr;
6161                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6162                                         /* Skip multi-cast addresses */
6163                                         goto next_param;
6164                                 }
6165                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6166                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6167                                         goto next_param;
6168                                 }
6169                                 sa = (struct sockaddr *)&sin;
6170                                 inp = stcb->sctp_ep;
6171                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6172                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6173                                     dst, stcb);
6174                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6175
6176                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6177                                     inp == NULL) {
6178                                         /* we must add the source address */
6179                                         /*
6180                                          * no scope set since we have a tcb
6181                                          * already
6182                                          */
6183
6184                                         /*
6185                                          * we must validate the state again
6186                                          * here
6187                                          */
6188                         add_it_now:
6189                                         if (stcb->asoc.state == 0) {
6190                                                 /* the assoc was freed? */
6191                                                 return (-7);
6192                                         }
6193                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6194                                                 return (-8);
6195                                         }
6196                                 } else if (stcb_tmp == stcb) {
6197                                         if (stcb->asoc.state == 0) {
6198                                                 /* the assoc was freed? */
6199                                                 return (-10);
6200                                         }
6201                                         if (net != NULL) {
6202                                                 /* clear flag */
6203                                                 net->dest_state &=
6204                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6205                                         }
6206                                 } else {
6207                                         /*
6208                                          * strange, address is in another
6209                                          * assoc? straighten out locks.
6210                                          */
6211                                         if (stcb_tmp) {
6212                                                 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6213                                                         struct mbuf *op_err;
6214                                                         char msg[SCTP_DIAG_INFO_LEN];
6215
6216                                                         /*
6217                                                          * in setup state we
6218                                                          * abort this guy
6219                                                          */
6220                                                         SCTP_SNPRINTF(msg, sizeof(msg),
6221                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6222                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6223                                                             msg);
6224                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6225                                                             stcb_tmp, op_err,
6226                                                             SCTP_SO_NOT_LOCKED);
6227                                                         goto add_it_now;
6228                                                 }
6229                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6230                                         }
6231
6232                                         if (stcb->asoc.state == 0) {
6233                                                 /* the assoc was freed? */
6234                                                 return (-12);
6235                                         }
6236                                         return (-13);
6237                                 }
6238                         }
6239                 } else
6240 #endif
6241 #ifdef INET6
6242                 if (ptype == SCTP_IPV6_ADDRESS) {
6243                         if (stcb->asoc.scope.ipv6_addr_legal) {
6244                                 /* ok get the v6 address and check/add */
6245                                 struct sctp_ipv6addr_param *p6, p6_buf;
6246
6247                                 phdr = sctp_get_next_param(m, offset,
6248                                     (struct sctp_paramhdr *)&p6_buf,
6249                                     sizeof(p6_buf));
6250                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6251                                     phdr == NULL) {
6252                                         return (-14);
6253                                 }
6254                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6255                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6256                                     sizeof(p6->addr));
6257                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6258                                         /* Skip multi-cast addresses */
6259                                         goto next_param;
6260                                 }
6261                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6262                                         /*
6263                                          * Link local make no sense without
6264                                          * scope
6265                                          */
6266                                         goto next_param;
6267                                 }
6268                                 sa = (struct sockaddr *)&sin6;
6269                                 inp = stcb->sctp_ep;
6270                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6271                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6272                                     dst, stcb);
6273                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6274                                 if (stcb_tmp == NULL &&
6275                                     (inp == stcb->sctp_ep || inp == NULL)) {
6276                                         /*
6277                                          * we must validate the state again
6278                                          * here
6279                                          */
6280                         add_it_now6:
6281                                         if (stcb->asoc.state == 0) {
6282                                                 /* the assoc was freed? */
6283                                                 return (-16);
6284                                         }
6285                                         /*
6286                                          * we must add the address, no scope
6287                                          * set
6288                                          */
6289                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6290                                                 return (-17);
6291                                         }
6292                                 } else if (stcb_tmp == stcb) {
6293                                         /*
6294                                          * we must validate the state again
6295                                          * here
6296                                          */
6297                                         if (stcb->asoc.state == 0) {
6298                                                 /* the assoc was freed? */
6299                                                 return (-19);
6300                                         }
6301                                         if (net != NULL) {
6302                                                 /* clear flag */
6303                                                 net->dest_state &=
6304                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6305                                         }
6306                                 } else {
6307                                         /*
6308                                          * strange, address is in another
6309                                          * assoc? straighten out locks.
6310                                          */
6311                                         if (stcb_tmp) {
6312                                                 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6313                                                         struct mbuf *op_err;
6314                                                         char msg[SCTP_DIAG_INFO_LEN];
6315
6316                                                         /*
6317                                                          * in setup state we
6318                                                          * abort this guy
6319                                                          */
6320                                                         SCTP_SNPRINTF(msg, sizeof(msg),
6321                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6322                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6323                                                             msg);
6324                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6325                                                             stcb_tmp, op_err,
6326                                                             SCTP_SO_NOT_LOCKED);
6327                                                         goto add_it_now6;
6328                                                 }
6329                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6330                                         }
6331                                         if (stcb->asoc.state == 0) {
6332                                                 /* the assoc was freed? */
6333                                                 return (-21);
6334                                         }
6335                                         return (-22);
6336                                 }
6337                         }
6338                 } else
6339 #endif
6340                 if (ptype == SCTP_ECN_CAPABLE) {
6341                         peer_supports_ecn = 1;
6342                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6343                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6344                                 struct sctp_adaptation_layer_indication ai,
6345                                                                 *aip;
6346
6347                                 phdr = sctp_get_next_param(m, offset,
6348                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6349                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6350                                 if (aip) {
6351                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6352                                         stcb->asoc.adaptation_needed = 1;
6353                                 }
6354                         }
6355                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6356                         struct sctp_asconf_addr_param lstore, *fee;
6357                         int lptype;
6358                         struct sockaddr *lsa = NULL;
6359 #ifdef INET
6360                         struct sctp_asconf_addrv4_param *fii;
6361 #endif
6362
6363                         if (stcb->asoc.asconf_supported == 0) {
6364                                 return (-100);
6365                         }
6366                         if (plen > sizeof(lstore)) {
6367                                 return (-23);
6368                         }
6369                         if (plen < sizeof(struct sctp_asconf_addrv4_param)) {
6370                                 return (-101);
6371                         }
6372                         phdr = sctp_get_next_param(m, offset,
6373                             (struct sctp_paramhdr *)&lstore,
6374                             plen);
6375                         if (phdr == NULL) {
6376                                 return (-24);
6377                         }
6378                         fee = (struct sctp_asconf_addr_param *)phdr;
6379                         lptype = ntohs(fee->addrp.ph.param_type);
6380                         switch (lptype) {
6381 #ifdef INET
6382                         case SCTP_IPV4_ADDRESS:
6383                                 if (plen !=
6384                                     sizeof(struct sctp_asconf_addrv4_param)) {
6385                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6386                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6387                                             plen);
6388                                 } else {
6389                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6390                                         sin.sin_addr.s_addr = fii->addrp.addr;
6391                                         lsa = (struct sockaddr *)&sin;
6392                                 }
6393                                 break;
6394 #endif
6395 #ifdef INET6
6396                         case SCTP_IPV6_ADDRESS:
6397                                 if (plen !=
6398                                     sizeof(struct sctp_asconf_addr_param)) {
6399                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6400                                             (int)sizeof(struct sctp_asconf_addr_param),
6401                                             plen);
6402                                 } else {
6403                                         memcpy(sin6.sin6_addr.s6_addr,
6404                                             fee->addrp.addr,
6405                                             sizeof(fee->addrp.addr));
6406                                         lsa = (struct sockaddr *)&sin6;
6407                                 }
6408                                 break;
6409 #endif
6410                         default:
6411                                 break;
6412                         }
6413                         if (lsa) {
6414                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6415                         }
6416                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6417                         stcb->asoc.peer_supports_nat = 1;
6418                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6419                         /* Peer supports pr-sctp */
6420                         peer_supports_prsctp = 1;
6421                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6422                         /* A supported extension chunk */
6423                         struct sctp_supported_chunk_types_param *pr_supported;
6424                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6425                         int num_ent, i;
6426
6427                         if (plen > sizeof(local_store)) {
6428                                 return (-35);
6429                         }
6430                         phdr = sctp_get_next_param(m, offset,
6431                             (struct sctp_paramhdr *)&local_store, plen);
6432                         if (phdr == NULL) {
6433                                 return (-25);
6434                         }
6435                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6436                         num_ent = plen - sizeof(struct sctp_paramhdr);
6437                         for (i = 0; i < num_ent; i++) {
6438                                 switch (pr_supported->chunk_types[i]) {
6439                                 case SCTP_ASCONF:
6440                                         peer_supports_asconf = 1;
6441                                         break;
6442                                 case SCTP_ASCONF_ACK:
6443                                         peer_supports_asconf_ack = 1;
6444                                         break;
6445                                 case SCTP_FORWARD_CUM_TSN:
6446                                         peer_supports_prsctp = 1;
6447                                         break;
6448                                 case SCTP_PACKET_DROPPED:
6449                                         peer_supports_pktdrop = 1;
6450                                         break;
6451                                 case SCTP_NR_SELECTIVE_ACK:
6452                                         peer_supports_nrsack = 1;
6453                                         break;
6454                                 case SCTP_STREAM_RESET:
6455                                         peer_supports_reconfig = 1;
6456                                         break;
6457                                 case SCTP_AUTHENTICATION:
6458                                         peer_supports_auth = 1;
6459                                         break;
6460                                 case SCTP_IDATA:
6461                                         peer_supports_idata = 1;
6462                                         break;
6463                                 default:
6464                                         /* one I have not learned yet */
6465                                         break;
6466
6467                                 }
6468                         }
6469                 } else if (ptype == SCTP_RANDOM) {
6470                         if (plen > sizeof(random_store))
6471                                 break;
6472                         if (got_random) {
6473                                 /* already processed a RANDOM */
6474                                 goto next_param;
6475                         }
6476                         phdr = sctp_get_next_param(m, offset,
6477                             (struct sctp_paramhdr *)random_store,
6478                             plen);
6479                         if (phdr == NULL)
6480                                 return (-26);
6481                         p_random = (struct sctp_auth_random *)phdr;
6482                         random_len = plen - sizeof(*p_random);
6483                         /* enforce the random length */
6484                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6485                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6486                                 return (-27);
6487                         }
6488                         got_random = 1;
6489                 } else if (ptype == SCTP_HMAC_LIST) {
6490                         uint16_t num_hmacs;
6491                         uint16_t i;
6492
6493                         if (plen > sizeof(hmacs_store))
6494                                 break;
6495                         if (got_hmacs) {
6496                                 /* already processed a HMAC list */
6497                                 goto next_param;
6498                         }
6499                         phdr = sctp_get_next_param(m, offset,
6500                             (struct sctp_paramhdr *)hmacs_store,
6501                             plen);
6502                         if (phdr == NULL)
6503                                 return (-28);
6504                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6505                         hmacs_len = plen - sizeof(*hmacs);
6506                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6507                         /* validate the hmac list */
6508                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6509                                 return (-29);
6510                         }
6511                         if (stcb->asoc.peer_hmacs != NULL)
6512                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6513                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6514                         if (stcb->asoc.peer_hmacs != NULL) {
6515                                 for (i = 0; i < num_hmacs; i++) {
6516                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6517                                             ntohs(hmacs->hmac_ids[i]));
6518                                 }
6519                         }
6520                         got_hmacs = 1;
6521                 } else if (ptype == SCTP_CHUNK_LIST) {
6522                         int i;
6523
6524                         if (plen > sizeof(chunks_store))
6525                                 break;
6526                         if (got_chklist) {
6527                                 /* already processed a Chunks list */
6528                                 goto next_param;
6529                         }
6530                         phdr = sctp_get_next_param(m, offset,
6531                             (struct sctp_paramhdr *)chunks_store,
6532                             plen);
6533                         if (phdr == NULL)
6534                                 return (-30);
6535                         chunks = (struct sctp_auth_chunk_list *)phdr;
6536                         num_chunks = plen - sizeof(*chunks);
6537                         if (stcb->asoc.peer_auth_chunks != NULL)
6538                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6539                         else
6540                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6541                         for (i = 0; i < num_chunks; i++) {
6542                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6543                                     stcb->asoc.peer_auth_chunks);
6544                                 /* record asconf/asconf-ack if listed */
6545                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6546                                         saw_asconf = 1;
6547                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6548                                         saw_asconf_ack = 1;
6549
6550                         }
6551                         got_chklist = 1;
6552                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6553                             (ptype == SCTP_STATE_COOKIE) ||
6554                             (ptype == SCTP_UNRECOG_PARAM) ||
6555                             (ptype == SCTP_COOKIE_PRESERVE) ||
6556                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6557                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6558                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6559                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6560                     (ptype == SCTP_SUCCESS_REPORT)) {
6561                          /* don't care */ ;
6562                 } else {
6563                         if ((ptype & 0x8000) == 0x0000) {
6564                                 /*
6565                                  * must stop processing the rest of the
6566                                  * param's. Any report bits were handled
6567                                  * with the call to
6568                                  * sctp_arethere_unrecognized_parameters()
6569                                  * when the INIT or INIT-ACK was first seen.
6570                                  */
6571                                 break;
6572                         }
6573                 }
6574
6575 next_param:
6576                 offset += SCTP_SIZE32(plen);
6577                 if (offset >= limit) {
6578                         break;
6579                 }
6580                 phdr = sctp_get_next_param(m, offset, &param_buf,
6581                     sizeof(param_buf));
6582         }
6583         /* Now check to see if we need to purge any addresses */
6584         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6585                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6586                     SCTP_ADDR_NOT_IN_ASSOC) {
6587                         /* This address has been removed from the asoc */
6588                         /* remove and free it */
6589                         stcb->asoc.numnets--;
6590                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6591                         sctp_free_remote_addr(net);
6592                         if (net == stcb->asoc.primary_destination) {
6593                                 stcb->asoc.primary_destination = NULL;
6594                                 sctp_select_primary_destination(stcb);
6595                         }
6596                 }
6597         }
6598         if ((stcb->asoc.ecn_supported == 1) &&
6599             (peer_supports_ecn == 0)) {
6600                 stcb->asoc.ecn_supported = 0;
6601         }
6602         if ((stcb->asoc.prsctp_supported == 1) &&
6603             (peer_supports_prsctp == 0)) {
6604                 stcb->asoc.prsctp_supported = 0;
6605         }
6606         if ((stcb->asoc.auth_supported == 1) &&
6607             ((peer_supports_auth == 0) ||
6608             (got_random == 0) || (got_hmacs == 0))) {
6609                 stcb->asoc.auth_supported = 0;
6610         }
6611         if ((stcb->asoc.asconf_supported == 1) &&
6612             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6613             (stcb->asoc.auth_supported == 0) ||
6614             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6615                 stcb->asoc.asconf_supported = 0;
6616         }
6617         if ((stcb->asoc.reconfig_supported == 1) &&
6618             (peer_supports_reconfig == 0)) {
6619                 stcb->asoc.reconfig_supported = 0;
6620         }
6621         if ((stcb->asoc.idata_supported == 1) &&
6622             (peer_supports_idata == 0)) {
6623                 stcb->asoc.idata_supported = 0;
6624         }
6625         if ((stcb->asoc.nrsack_supported == 1) &&
6626             (peer_supports_nrsack == 0)) {
6627                 stcb->asoc.nrsack_supported = 0;
6628         }
6629         if ((stcb->asoc.pktdrop_supported == 1) &&
6630             (peer_supports_pktdrop == 0)) {
6631                 stcb->asoc.pktdrop_supported = 0;
6632         }
6633         /* validate authentication required parameters */
6634         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6635                 /* peer does not support auth but sent a chunks list? */
6636                 return (-31);
6637         }
6638         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6639                 /* peer supports asconf but not auth? */
6640                 return (-32);
6641         } else if ((peer_supports_asconf == 1) &&
6642                     (peer_supports_auth == 1) &&
6643             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6644                 return (-33);
6645         }
6646         /* concatenate the full random key */
6647         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6648         if (chunks != NULL) {
6649                 keylen += sizeof(*chunks) + num_chunks;
6650         }
6651         new_key = sctp_alloc_key(keylen);
6652         if (new_key != NULL) {
6653                 /* copy in the RANDOM */
6654                 if (p_random != NULL) {
6655                         keylen = sizeof(*p_random) + random_len;
6656                         memcpy(new_key->key, p_random, keylen);
6657                 } else {
6658                         keylen = 0;
6659                 }
6660                 /* append in the AUTH chunks */
6661                 if (chunks != NULL) {
6662                         memcpy(new_key->key + keylen, chunks,
6663                             sizeof(*chunks) + num_chunks);
6664                         keylen += sizeof(*chunks) + num_chunks;
6665                 }
6666                 /* append in the HMACs */
6667                 if (hmacs != NULL) {
6668                         memcpy(new_key->key + keylen, hmacs,
6669                             sizeof(*hmacs) + hmacs_len);
6670                 }
6671         } else {
6672                 /* failed to get memory for the key */
6673                 return (-34);
6674         }
6675         if (stcb->asoc.authinfo.peer_random != NULL)
6676                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6677         stcb->asoc.authinfo.peer_random = new_key;
6678         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6679         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6680
6681         return (0);
6682 }
6683
6684 int
6685 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6686     struct sctp_nets *net)
6687 {
6688         /* make sure the requested primary address exists in the assoc */
6689         if (net == NULL && sa)
6690                 net = sctp_findnet(stcb, sa);
6691
6692         if (net == NULL) {
6693                 /* didn't find the requested primary address! */
6694                 return (-1);
6695         } else {
6696                 /* set the primary address */
6697                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6698                         /* Must be confirmed, so queue to set */
6699                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6700                         return (0);
6701                 }
6702                 stcb->asoc.primary_destination = net;
6703                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6704                         sctp_free_remote_addr(stcb->asoc.alternate);
6705                         stcb->asoc.alternate = NULL;
6706                 }
6707                 net = TAILQ_FIRST(&stcb->asoc.nets);
6708                 if (net != stcb->asoc.primary_destination) {
6709                         /*
6710                          * first one on the list is NOT the primary
6711                          * sctp_cmpaddr() is much more efficient if the
6712                          * primary is the first on the list, make it so.
6713                          */
6714                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6715                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6716                 }
6717                 return (0);
6718         }
6719 }
6720
6721 int
6722 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6723 {
6724         /*
6725          * This function serves two purposes. It will see if a TAG can be
6726          * re-used and return 1 for yes it is ok and 0 for don't use that
6727          * tag. A secondary function it will do is purge out old tags that
6728          * can be removed.
6729          */
6730         struct sctpvtaghead *chain;
6731         struct sctp_tagblock *twait_block;
6732         struct sctpasochead *head;
6733         struct sctp_tcb *stcb;
6734         int i;
6735
6736         SCTP_INP_INFO_RLOCK();
6737         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6738             SCTP_BASE_INFO(hashasocmark))];
6739         LIST_FOREACH(stcb, head, sctp_asocs) {
6740                 /*
6741                  * We choose not to lock anything here. TCB's can't be
6742                  * removed since we have the read lock, so they can't be
6743                  * freed on us, same thing for the INP. I may be wrong with
6744                  * this assumption, but we will go with it for now :-)
6745                  */
6746                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6747                         continue;
6748                 }
6749                 if (stcb->asoc.my_vtag == tag) {
6750                         /* candidate */
6751                         if (stcb->rport != rport) {
6752                                 continue;
6753                         }
6754                         if (stcb->sctp_ep->sctp_lport != lport) {
6755                                 continue;
6756                         }
6757                         /* Its a used tag set */
6758                         SCTP_INP_INFO_RUNLOCK();
6759                         return (0);
6760                 }
6761         }
6762         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6763         /* Now what about timed wait ? */
6764         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6765                 /*
6766                  * Block(s) are present, lets see if we have this tag in the
6767                  * list
6768                  */
6769                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6770                         if (twait_block->vtag_block[i].v_tag == 0) {
6771                                 /* not used */
6772                                 continue;
6773                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6774                             now->tv_sec) {
6775                                 /* Audit expires this guy */
6776                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6777                                 twait_block->vtag_block[i].v_tag = 0;
6778                                 twait_block->vtag_block[i].lport = 0;
6779                                 twait_block->vtag_block[i].rport = 0;
6780                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6781                                     (twait_block->vtag_block[i].lport == lport) &&
6782                             (twait_block->vtag_block[i].rport == rport)) {
6783                                 /* Bad tag, sorry :< */
6784                                 SCTP_INP_INFO_RUNLOCK();
6785                                 return (0);
6786                         }
6787                 }
6788         }
6789         SCTP_INP_INFO_RUNLOCK();
6790         return (1);
6791 }
6792
6793 static void
6794 sctp_drain_mbufs(struct sctp_tcb *stcb)
6795 {
6796         /*
6797          * We must hunt this association for MBUF's past the cumack (i.e.
6798          * out of order data that we can renege on).
6799          */
6800         struct sctp_association *asoc;
6801         struct sctp_tmit_chunk *chk, *nchk;
6802         uint32_t cumulative_tsn_p1;
6803         struct sctp_queued_to_read *control, *ncontrol;
6804         int cnt, strmat;
6805         uint32_t gap, i;
6806         int fnd = 0;
6807
6808         /* We look for anything larger than the cum-ack + 1 */
6809
6810         asoc = &stcb->asoc;
6811         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6812                 /* none we can reneg on. */
6813                 return;
6814         }
6815         SCTP_STAT_INCR(sctps_protocol_drains_done);
6816         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6817         cnt = 0;
6818         /* Ok that was fun, now we will drain all the inbound streams? */
6819         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6820                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) {
6821 #ifdef INVARIANTS
6822                         if (control->on_strm_q != SCTP_ON_ORDERED) {
6823                                 panic("Huh control: %p on_q: %d -- not ordered?",
6824                                     control, control->on_strm_q);
6825                         }
6826 #endif
6827                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6828                                 /* Yep it is above cum-ack */
6829                                 cnt++;
6830                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6831                                 KASSERT(control->length > 0, ("control has zero length"));
6832                                 if (asoc->size_on_all_streams >= control->length) {
6833                                         asoc->size_on_all_streams -= control->length;
6834                                 } else {
6835 #ifdef INVARIANTS
6836                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6837 #else
6838                                         asoc->size_on_all_streams = 0;
6839 #endif
6840                                 }
6841                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6842                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6843                                 if (control->on_read_q) {
6844                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6845                                         control->on_read_q = 0;
6846                                 }
6847                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm);
6848                                 control->on_strm_q = 0;
6849                                 if (control->data) {
6850                                         sctp_m_freem(control->data);
6851                                         control->data = NULL;
6852                                 }
6853                                 sctp_free_remote_addr(control->whoFrom);
6854                                 /* Now its reasm? */
6855                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6856                                         cnt++;
6857                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6858                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6859                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6860                                                 asoc->size_on_reasm_queue -= chk->send_size;
6861                                         } else {
6862 #ifdef INVARIANTS
6863                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6864 #else
6865                                                 asoc->size_on_reasm_queue = 0;
6866 #endif
6867                                         }
6868                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6869                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6870                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6871                                         if (chk->data) {
6872                                                 sctp_m_freem(chk->data);
6873                                                 chk->data = NULL;
6874                                         }
6875                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6876                                 }
6877                                 sctp_free_a_readq(stcb, control);
6878                         }
6879                 }
6880                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) {
6881 #ifdef INVARIANTS
6882                         if (control->on_strm_q != SCTP_ON_UNORDERED) {
6883                                 panic("Huh control: %p on_q: %d -- not unordered?",
6884                                     control, control->on_strm_q);
6885                         }
6886 #endif
6887                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6888                                 /* Yep it is above cum-ack */
6889                                 cnt++;
6890                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6891                                 KASSERT(control->length > 0, ("control has zero length"));
6892                                 if (asoc->size_on_all_streams >= control->length) {
6893                                         asoc->size_on_all_streams -= control->length;
6894                                 } else {
6895 #ifdef INVARIANTS
6896                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6897 #else
6898                                         asoc->size_on_all_streams = 0;
6899 #endif
6900                                 }
6901                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6902                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6903                                 if (control->on_read_q) {
6904                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6905                                         control->on_read_q = 0;
6906                                 }
6907                                 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm);
6908                                 control->on_strm_q = 0;
6909                                 if (control->data) {
6910                                         sctp_m_freem(control->data);
6911                                         control->data = NULL;
6912                                 }
6913                                 sctp_free_remote_addr(control->whoFrom);
6914                                 /* Now its reasm? */
6915                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6916                                         cnt++;
6917                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6918                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6919                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6920                                                 asoc->size_on_reasm_queue -= chk->send_size;
6921                                         } else {
6922 #ifdef INVARIANTS
6923                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6924 #else
6925                                                 asoc->size_on_reasm_queue = 0;
6926 #endif
6927                                         }
6928                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6929                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6930                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6931                                         if (chk->data) {
6932                                                 sctp_m_freem(chk->data);
6933                                                 chk->data = NULL;
6934                                         }
6935                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6936                                 }
6937                                 sctp_free_a_readq(stcb, control);
6938                         }
6939                 }
6940         }
6941         if (cnt) {
6942                 /* We must back down to see what the new highest is */
6943                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6944                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6945                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6946                                 asoc->highest_tsn_inside_map = i;
6947                                 fnd = 1;
6948                                 break;
6949                         }
6950                 }
6951                 if (!fnd) {
6952                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6953                 }
6954
6955                 /*
6956                  * Question, should we go through the delivery queue? The
6957                  * only reason things are on here is the app not reading OR
6958                  * a p-d-api up. An attacker COULD send enough in to
6959                  * initiate the PD-API and then send a bunch of stuff to
6960                  * other streams... these would wind up on the delivery
6961                  * queue.. and then we would not get to them. But in order
6962                  * to do this I then have to back-track and un-deliver
6963                  * sequence numbers in streams.. el-yucko. I think for now
6964                  * we will NOT look at the delivery queue and leave it to be
6965                  * something to consider later. An alternative would be to
6966                  * abort the P-D-API with a notification and then deliver
6967                  * the data.... Or another method might be to keep track of
6968                  * how many times the situation occurs and if we see a
6969                  * possible attack underway just abort the association.
6970                  */
6971 #ifdef SCTP_DEBUG
6972                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6973 #endif
6974                 /*
6975                  * Now do we need to find a new
6976                  * asoc->highest_tsn_inside_map?
6977                  */
6978                 asoc->last_revoke_count = cnt;
6979                 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
6980                     SCTP_FROM_SCTP_PCB + SCTP_LOC_11);
6981                 /* sa_ignore NO_NULL_CHK */
6982                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6983                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6984         }
6985         /*
6986          * Another issue, in un-setting the TSN's in the mapping array we
6987          * DID NOT adjust the highest_tsn marker.  This will cause one of
6988          * two things to occur. It may cause us to do extra work in checking
6989          * for our mapping array movement. More importantly it may cause us
6990          * to SACK every datagram. This may not be a bad thing though since
6991          * we will recover once we get our cum-ack above and all this stuff
6992          * we dumped recovered.
6993          */
6994 }
6995
6996 void
6997 sctp_drain()
6998 {
6999         /*
7000          * We must walk the PCB lists for ALL associations here. The system
7001          * is LOW on MBUF's and needs help. This is where reneging will
7002          * occur. We really hope this does NOT happen!
7003          */
7004         VNET_ITERATOR_DECL(vnet_iter);
7005         VNET_LIST_RLOCK_NOSLEEP();
7006         VNET_FOREACH(vnet_iter) {
7007                 CURVNET_SET(vnet_iter);
7008                 struct sctp_inpcb *inp;
7009                 struct sctp_tcb *stcb;
7010
7011                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
7012                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7013 #ifdef VIMAGE
7014                         continue;
7015 #else
7016                         return;
7017 #endif
7018                 }
7019                 SCTP_INP_INFO_RLOCK();
7020                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7021                         /* For each endpoint */
7022                         SCTP_INP_RLOCK(inp);
7023                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7024                                 /* For each association */
7025                                 SCTP_TCB_LOCK(stcb);
7026                                 sctp_drain_mbufs(stcb);
7027                                 SCTP_TCB_UNLOCK(stcb);
7028                         }
7029                         SCTP_INP_RUNLOCK(inp);
7030                 }
7031                 SCTP_INP_INFO_RUNLOCK();
7032                 CURVNET_RESTORE();
7033         }
7034         VNET_LIST_RUNLOCK_NOSLEEP();
7035 }
7036
7037 /*
7038  * start a new iterator
7039  * iterates through all endpoints and associations based on the pcb_state
7040  * flags and asoc_state.  "af" (mandatory) is executed for all matching
7041  * assocs and "ef" (optional) is executed when the iterator completes.
7042  * "inpf" (optional) is executed for each new endpoint as it is being
7043  * iterated through. inpe (optional) is called when the inp completes
7044  * its way through all the stcbs.
7045  */
7046 int
7047 sctp_initiate_iterator(inp_func inpf,
7048     asoc_func af,
7049     inp_func inpe,
7050     uint32_t pcb_state,
7051     uint32_t pcb_features,
7052     uint32_t asoc_state,
7053     void *argp,
7054     uint32_t argi,
7055     end_func ef,
7056     struct sctp_inpcb *s_inp,
7057     uint8_t chunk_output_off)
7058 {
7059         struct sctp_iterator *it = NULL;
7060
7061         if (af == NULL) {
7062                 return (-1);
7063         }
7064         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7065                 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7066                     SCTP_BASE_VAR(sctp_pcb_initialized));
7067                 return (-1);
7068         }
7069         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7070             SCTP_M_ITER);
7071         if (it == NULL) {
7072                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7073                 return (-1);
7074         }
7075         memset(it, 0, sizeof(*it));
7076         it->function_assoc = af;
7077         it->function_inp = inpf;
7078         if (inpf)
7079                 it->done_current_ep = 0;
7080         else
7081                 it->done_current_ep = 1;
7082         it->function_atend = ef;
7083         it->pointer = argp;
7084         it->val = argi;
7085         it->pcb_flags = pcb_state;
7086         it->pcb_features = pcb_features;
7087         it->asoc_state = asoc_state;
7088         it->function_inp_end = inpe;
7089         it->no_chunk_output = chunk_output_off;
7090         it->vn = curvnet;
7091         if (s_inp) {
7092                 /* Assume lock is held here */
7093                 it->inp = s_inp;
7094                 SCTP_INP_INCR_REF(it->inp);
7095                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7096         } else {
7097                 SCTP_INP_INFO_RLOCK();
7098                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7099                 if (it->inp) {
7100                         SCTP_INP_INCR_REF(it->inp);
7101                 }
7102                 SCTP_INP_INFO_RUNLOCK();
7103                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7104
7105         }
7106         SCTP_IPI_ITERATOR_WQ_LOCK();
7107         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7108                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7109                 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7110                     SCTP_BASE_VAR(sctp_pcb_initialized), it);
7111                 SCTP_FREE(it, SCTP_M_ITER);
7112                 return (-1);
7113         }
7114         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7115         if (sctp_it_ctl.iterator_running == 0) {
7116                 sctp_wakeup_iterator();
7117         }
7118         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7119         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7120         return (0);
7121 }