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 #include <netinet/sctp_dtrace_define.h>
  51 #if defined(INET) || defined(INET6)
  52 #include <netinet/udp.h>
  53 #endif
  54 #ifdef INET6
  55 #include <netinet6/ip6_var.h>
  56 #endif
  57 #include <sys/sched.h>
  58 #include <sys/smp.h>
  59 #include <sys/unistd.h>
  60
  61
  62 VNET_DEFINE(struct sctp_base_info, system_base_info);
  63
  64 /* FIX: we don't handle multiple link local scopes */
  65 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  66 #ifdef INET6
  67 int
  68 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  69 {
  70         struct sockaddr_in6 tmp_a, tmp_b;
  71
  72         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  73         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  74                 return (0);
  75         }
  76         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  77         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  78                 return (0);
  79         }
  80         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  81 }
  82 #endif
  83
  84 void
  85 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  86 {
  87         /*
  88          * We really don't need to lock this, but I will just because it
  89          * does not hurt.
  90          */
  91         SCTP_INP_INFO_RLOCK();
  92         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  93         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  94         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  95         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  96         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  97         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  98         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  99         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
 100         SCTP_INP_INFO_RUNLOCK();
 101 }
 102
 103 /*-
 104  * Addresses are added to VRF's (Virtual Router's). For BSD we
 105  * have only the default VRF 0. We maintain a hash list of
 106  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
 107  * these has a list of addresses. When we add a new address
 108  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 109  * not exist we create it and add it to the list of IFN's
 110  * within the VRF. Once we have the sctp_ifn, we add the
 111  * address to the list. So we look something like:
 112  *
 113  * hash-vrf-table
 114  *   vrf-> ifn-> ifn -> ifn
 115  *   vrf    |
 116  *    ...   +--ifa-> ifa -> ifa
 117  *   vrf
 118  *
 119  * We keep these separate lists since the SCTP subsystem will
 120  * point to these from its source address selection nets structure.
 121  * When an address is deleted it does not happen right away on
 122  * the SCTP side, it gets scheduled. What we do when a
 123  * delete happens is immediately remove the address from
 124  * the master list and decrement the refcount. As our
 125  * addip iterator works through and frees the src address
 126  * selection pointing to the sctp_ifa, eventually the refcount
 127  * will reach 0 and we will delete it. Note that it is assumed
 128  * that any locking on system level ifn/ifa is done at the
 129  * caller of these functions and these routines will only
 130  * lock the SCTP structures as they add or delete things.
 131  *
 132  * Other notes on VRF concepts.
 133  *  - An endpoint can be in multiple VRF's
 134  *  - An association lives within a VRF and only one VRF.
 135  *  - Any incoming packet we can deduce the VRF for by
 136  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 137  *  - Any downward send call or connect call must supply the
 138  *    VRF via ancillary data or via some sort of set default
 139  *    VRF socket option call (again for BSD no brainer since
 140  *    the VRF is always 0).
 141  *  - An endpoint may add multiple VRF's to it.
 142  *  - Listening sockets can accept associations in any
 143  *    of the VRF's they are in but the assoc will end up
 144  *    in only one VRF (gotten from the packet or connect/send).
 145  *
 146  */
 147
 148 struct sctp_vrf *
 149 sctp_allocate_vrf(int vrf_id)
 150 {
 151         struct sctp_vrf *vrf = NULL;
 152         struct sctp_vrflist *bucket;
 153
 154         /* First allocate the VRF structure */
 155         vrf = sctp_find_vrf(vrf_id);
 156         if (vrf) {
 157                 /* Already allocated */
 158                 return (vrf);
 159         }
 160         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 161             SCTP_M_VRF);
 162         if (vrf == NULL) {
 163                 /* No memory */
 164 #ifdef INVARIANTS
 165                 panic("No memory for VRF:%d", vrf_id);
 166 #endif
 167                 return (NULL);
 168         }
 169         /* setup the VRF */
 170         memset(vrf, 0, sizeof(struct sctp_vrf));
 171         vrf->vrf_id = vrf_id;
 172         LIST_INIT(&vrf->ifnlist);
 173         vrf->total_ifa_count = 0;
 174         vrf->refcount = 0;
 175         /* now also setup table ids */
 176         SCTP_INIT_VRF_TABLEID(vrf);
 177         /* Init the HASH of addresses */
 178         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 179             &vrf->vrf_addr_hashmark);
 180         if (vrf->vrf_addr_hash == NULL) {
 181                 /* No memory */
 182 #ifdef INVARIANTS
 183                 panic("No memory for VRF:%d", vrf_id);
 184 #endif
 185                 SCTP_FREE(vrf, SCTP_M_VRF);
 186                 return (NULL);
 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                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
 548                 } else {
 549                         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 #ifdef SCTP_DEBUG
 740         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 741         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 742 #endif
 743         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 744         if (sctp_ifap) {
 745                 /* Validate the delete */
 746                 if (sctp_ifap->ifn_p) {
 747                         int valid = 0;
 748
 749                         /*-
 750                          * The name has priority over the ifn_index
 751                          * if its given. We do this especially for
 752                          * panda who might recycle indexes fast.
 753                          */
 754                         if (if_name) {
 755                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 756                                         /* They match its a correct delete */
 757                                         valid = 1;
 758                                 }
 759                         }
 760                         if (!valid) {
 761                                 /* last ditch check ifn_index */
 762                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 763                                         valid = 1;
 764                                 }
 765                         }
 766                         if (!valid) {
 767                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 768                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 769                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 770                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 771                                 SCTP_IPI_ADDR_WUNLOCK();
 772                                 return;
 773                         }
 774                 }
 775                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
 776                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 777                 /*
 778                  * We don't set the flag. This means that the structure will
 779                  * hang around in EP's that have bound specific to it until
 780                  * they close. This gives us TCP like behavior if someone
 781                  * removes an address (or for that matter adds it right
 782                  * back).
 783                  */
 784                 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
 785                 vrf->total_ifa_count--;
 786                 LIST_REMOVE(sctp_ifap, next_bucket);
 787                 sctp_remove_ifa_from_ifn(sctp_ifap);
 788         }
 789 #ifdef SCTP_DEBUG
 790         else {
 791                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 792                     ifn_index);
 793                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 794         }
 795 #endif
 796
 797 out_now:
 798         SCTP_IPI_ADDR_WUNLOCK();
 799         if (sctp_ifap) {
 800                 struct sctp_laddr *wi;
 801
 802                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 803                 if (wi == NULL) {
 804                         /*
 805                          * Gak, what can we do? We have lost an address
 806                          * change can you say HOSED?
 807                          */
 808                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 809
 810                         /* Oops, must decrement the count */
 811                         sctp_free_ifa(sctp_ifap);
 812                         return;
 813                 }
 814                 SCTP_INCR_LADDR_COUNT();
 815                 memset(wi, 0, sizeof(*wi));
 816                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 817                 wi->ifa = sctp_ifap;
 818                 wi->action = SCTP_DEL_IP_ADDRESS;
 819                 SCTP_WQ_ADDR_LOCK();
 820                 /*
 821                  * Should this really be a tailq? As it is we will process
 822                  * the newest first :-0
 823                  */
 824                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 825                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 826                     (struct sctp_inpcb *)NULL,
 827                     (struct sctp_tcb *)NULL,
 828                     (struct sctp_nets *)NULL);
 829                 SCTP_WQ_ADDR_UNLOCK();
 830         }
 831         return;
 832 }
 833
 834
 835 static int
 836 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
 837 {
 838         int loopback_scope;
 839 #if defined(INET)
 840         int ipv4_local_scope, ipv4_addr_legal;
 841 #endif
 842 #if defined(INET6)
 843         int local_scope, site_scope, ipv6_addr_legal;
 844 #endif
 845         struct sctp_vrf *vrf;
 846         struct sctp_ifn *sctp_ifn;
 847         struct sctp_ifa *sctp_ifa;
 848
 849         loopback_scope = stcb->asoc.scope.loopback_scope;
 850 #if defined(INET)
 851         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
 852         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
 853 #endif
 854 #if defined(INET6)
 855         local_scope = stcb->asoc.scope.local_scope;
 856         site_scope = stcb->asoc.scope.site_scope;
 857         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
 858 #endif
 859
 860         SCTP_IPI_ADDR_RLOCK();
 861         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
 862         if (vrf == NULL) {
 863                 /* no vrf, no addresses */
 864                 SCTP_IPI_ADDR_RUNLOCK();
 865                 return (0);
 866         }
 867         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 868                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 869                         if ((loopback_scope == 0) &&
 870                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 871                                 continue;
 872                         }
 873                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 874                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
 875                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
 876                                         /*
 877                                          * We allow pending addresses, where
 878                                          * we have sent an asconf-add to be
 879                                          * considered valid.
 880                                          */
 881                                         continue;
 882                                 }
 883                                 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
 884                                         continue;
 885                                 }
 886                                 switch (sctp_ifa->address.sa.sa_family) {
 887 #ifdef INET
 888                                 case AF_INET:
 889                                         if (ipv4_addr_legal) {
 890                                                 struct sockaddr_in *sin,
 891                                                            *rsin;
 892
 893                                                 sin = &sctp_ifa->address.sin;
 894                                                 rsin = (struct sockaddr_in *)to;
 895                                                 if ((ipv4_local_scope == 0) &&
 896                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 897                                                         continue;
 898                                                 }
 899                                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
 900                                                     &sin->sin_addr) != 0) {
 901                                                         continue;
 902                                                 }
 903                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 904                                                         SCTP_IPI_ADDR_RUNLOCK();
 905                                                         return (1);
 906                                                 }
 907                                         }
 908                                         break;
 909 #endif
 910 #ifdef INET6
 911                                 case AF_INET6:
 912                                         if (ipv6_addr_legal) {
 913                                                 struct sockaddr_in6 *sin6,
 914                                                             *rsin6;
 915
 916                                                 sin6 = &sctp_ifa->address.sin6;
 917                                                 rsin6 = (struct sockaddr_in6 *)to;
 918                                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
 919                                                     &sin6->sin6_addr) != 0) {
 920                                                         continue;
 921                                                 }
 922                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 923                                                         if (local_scope == 0)
 924                                                                 continue;
 925                                                         if (sin6->sin6_scope_id == 0) {
 926                                                                 if (sa6_recoverscope(sin6) != 0)
 927                                                                         continue;
 928                                                         }
 929                                                 }
 930                                                 if ((site_scope == 0) &&
 931                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
 932                                                         continue;
 933                                                 }
 934                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 935                                                         SCTP_IPI_ADDR_RUNLOCK();
 936                                                         return (1);
 937                                                 }
 938                                         }
 939                                         break;
 940 #endif
 941                                 default:
 942                                         /* TSNH */
 943                                         break;
 944                                 }
 945                         }
 946                 }
 947         } else {
 948                 struct sctp_laddr *laddr;
 949
 950                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
 951                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 952                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 953                                 continue;
 954                         }
 955                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
 956                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
 957                                 /*
 958                                  * We allow pending addresses, where we have
 959                                  * sent an asconf-add to be considered
 960                                  * valid.
 961                                  */
 962                                 continue;
 963                         }
 964                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
 965                                 continue;
 966                         }
 967                         switch (to->sa_family) {
 968 #ifdef INET
 969                         case AF_INET:
 970                                 {
 971                                         struct sockaddr_in *sin, *rsin;
 972
 973                                         sin = &laddr->ifa->address.sin;
 974                                         rsin = (struct sockaddr_in *)to;
 975                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 976                                                 SCTP_IPI_ADDR_RUNLOCK();
 977                                                 return (1);
 978                                         }
 979                                         break;
 980                                 }
 981 #endif
 982 #ifdef INET6
 983                         case AF_INET6:
 984                                 {
 985                                         struct sockaddr_in6 *sin6, *rsin6;
 986
 987                                         sin6 = &laddr->ifa->address.sin6;
 988                                         rsin6 = (struct sockaddr_in6 *)to;
 989                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 990                                                 SCTP_IPI_ADDR_RUNLOCK();
 991                                                 return (1);
 992                                         }
 993                                         break;
 994                                 }
 995
 996 #endif
 997                         default:
 998                                 /* TSNH */
 999                                 break;
1000                         }
1001
1002                 }
1003         }
1004         SCTP_IPI_ADDR_RUNLOCK();
1005         return (0);
1006 }
1007
1008
1009 static struct sctp_tcb *
1010 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1011     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1012 {
1013         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1014         /*
1015          * If we support the TCP model, then we must now dig through to see
1016          * if we can find our endpoint in the list of tcp ep's.
1017          */
1018         uint16_t lport, rport;
1019         struct sctppcbhead *ephead;
1020         struct sctp_inpcb *inp;
1021         struct sctp_laddr *laddr;
1022         struct sctp_tcb *stcb;
1023         struct sctp_nets *net;
1024
1025         if ((to == NULL) || (from == NULL)) {
1026                 return (NULL);
1027         }
1028         switch (to->sa_family) {
1029 #ifdef INET
1030         case AF_INET:
1031                 if (from->sa_family == AF_INET) {
1032                         lport = ((struct sockaddr_in *)to)->sin_port;
1033                         rport = ((struct sockaddr_in *)from)->sin_port;
1034                 } else {
1035                         return (NULL);
1036                 }
1037                 break;
1038 #endif
1039 #ifdef INET6
1040         case AF_INET6:
1041                 if (from->sa_family == AF_INET6) {
1042                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
1043                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
1044                 } else {
1045                         return (NULL);
1046                 }
1047                 break;
1048 #endif
1049         default:
1050                 return (NULL);
1051         }
1052         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1053         /*
1054          * Ok now for each of the guys in this bucket we must look and see:
1055          * - Does the remote port match. - Does there single association's
1056          * addresses match this address (to). If so we update p_ep to point
1057          * to this ep and return the tcb from it.
1058          */
1059         LIST_FOREACH(inp, ephead, sctp_hash) {
1060                 SCTP_INP_RLOCK(inp);
1061                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1062                         SCTP_INP_RUNLOCK(inp);
1063                         continue;
1064                 }
1065                 if (lport != inp->sctp_lport) {
1066                         SCTP_INP_RUNLOCK(inp);
1067                         continue;
1068                 }
1069                 switch (to->sa_family) {
1070 #ifdef INET
1071                 case AF_INET:
1072                         {
1073                                 struct sockaddr_in *sin;
1074
1075                                 sin = (struct sockaddr_in *)to;
1076                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1077                                     &sin->sin_addr) != 0) {
1078                                         SCTP_INP_RUNLOCK(inp);
1079                                         continue;
1080                                 }
1081                                 break;
1082                         }
1083 #endif
1084 #ifdef INET6
1085                 case AF_INET6:
1086                         {
1087                                 struct sockaddr_in6 *sin6;
1088
1089                                 sin6 = (struct sockaddr_in6 *)to;
1090                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1091                                     &sin6->sin6_addr) != 0) {
1092                                         SCTP_INP_RUNLOCK(inp);
1093                                         continue;
1094                                 }
1095                                 break;
1096                         }
1097 #endif
1098                 default:
1099                         SCTP_INP_RUNLOCK(inp);
1100                         continue;
1101                 }
1102                 if (inp->def_vrf_id != vrf_id) {
1103                         SCTP_INP_RUNLOCK(inp);
1104                         continue;
1105                 }
1106                 /* check to see if the ep has one of the addresses */
1107                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1108                         /* We are NOT bound all, so look further */
1109                         int match = 0;
1110
1111                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1112
1113                                 if (laddr->ifa == NULL) {
1114                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__);
1115                                         continue;
1116                                 }
1117                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1118                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1119                                         continue;
1120                                 }
1121                                 if (laddr->ifa->address.sa.sa_family ==
1122                                     to->sa_family) {
1123                                         /* see if it matches */
1124 #ifdef INET
1125                                         if (from->sa_family == AF_INET) {
1126                                                 struct sockaddr_in *intf_addr,
1127                                                            *sin;
1128
1129                                                 intf_addr = &laddr->ifa->address.sin;
1130                                                 sin = (struct sockaddr_in *)to;
1131                                                 if (sin->sin_addr.s_addr ==
1132                                                     intf_addr->sin_addr.s_addr) {
1133                                                         match = 1;
1134                                                         break;
1135                                                 }
1136                                         }
1137 #endif
1138 #ifdef INET6
1139                                         if (from->sa_family == AF_INET6) {
1140                                                 struct sockaddr_in6 *intf_addr6;
1141                                                 struct sockaddr_in6 *sin6;
1142
1143                                                 sin6 = (struct sockaddr_in6 *)
1144                                                     to;
1145                                                 intf_addr6 = &laddr->ifa->address.sin6;
1146
1147                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1148                                                     intf_addr6)) {
1149                                                         match = 1;
1150                                                         break;
1151                                                 }
1152                                         }
1153 #endif
1154                                 }
1155                         }
1156                         if (match == 0) {
1157                                 /* This endpoint does not have this address */
1158                                 SCTP_INP_RUNLOCK(inp);
1159                                 continue;
1160                         }
1161                 }
1162                 /*
1163                  * Ok if we hit here the ep has the address, does it hold
1164                  * the tcb?
1165                  */
1166                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1167                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1168                 if (stcb == NULL) {
1169                         SCTP_INP_RUNLOCK(inp);
1170                         continue;
1171                 }
1172                 SCTP_TCB_LOCK(stcb);
1173                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1174                         SCTP_TCB_UNLOCK(stcb);
1175                         SCTP_INP_RUNLOCK(inp);
1176                         continue;
1177                 }
1178                 if (stcb->rport != rport) {
1179                         /* remote port does not match. */
1180                         SCTP_TCB_UNLOCK(stcb);
1181                         SCTP_INP_RUNLOCK(inp);
1182                         continue;
1183                 }
1184                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1185                         SCTP_TCB_UNLOCK(stcb);
1186                         SCTP_INP_RUNLOCK(inp);
1187                         continue;
1188                 }
1189                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1190                         SCTP_TCB_UNLOCK(stcb);
1191                         SCTP_INP_RUNLOCK(inp);
1192                         continue;
1193                 }
1194                 /* Does this TCB have a matching address? */
1195                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1196
1197                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1198                                 /* not the same family, can't be a match */
1199                                 continue;
1200                         }
1201                         switch (from->sa_family) {
1202 #ifdef INET
1203                         case AF_INET:
1204                                 {
1205                                         struct sockaddr_in *sin, *rsin;
1206
1207                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
1208                                         rsin = (struct sockaddr_in *)from;
1209                                         if (sin->sin_addr.s_addr ==
1210                                             rsin->sin_addr.s_addr) {
1211                                                 /* found it */
1212                                                 if (netp != NULL) {
1213                                                         *netp = net;
1214                                                 }
1215                                                 /*
1216                                                  * Update the endpoint
1217                                                  * pointer
1218                                                  */
1219                                                 *inp_p = inp;
1220                                                 SCTP_INP_RUNLOCK(inp);
1221                                                 return (stcb);
1222                                         }
1223                                         break;
1224                                 }
1225 #endif
1226 #ifdef INET6
1227                         case AF_INET6:
1228                                 {
1229                                         struct sockaddr_in6 *sin6, *rsin6;
1230
1231                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1232                                         rsin6 = (struct sockaddr_in6 *)from;
1233                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1234                                             rsin6)) {
1235                                                 /* found it */
1236                                                 if (netp != NULL) {
1237                                                         *netp = net;
1238                                                 }
1239                                                 /*
1240                                                  * Update the endpoint
1241                                                  * pointer
1242                                                  */
1243                                                 *inp_p = inp;
1244                                                 SCTP_INP_RUNLOCK(inp);
1245                                                 return (stcb);
1246                                         }
1247                                         break;
1248                                 }
1249 #endif
1250                         default:
1251                                 /* TSNH */
1252                                 break;
1253                         }
1254                 }
1255                 SCTP_TCB_UNLOCK(stcb);
1256                 SCTP_INP_RUNLOCK(inp);
1257         }
1258         return (NULL);
1259 }
1260
1261
1262 /*
1263  * rules for use
1264  *
1265  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1266  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1267  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1268  * NULL.
1269  */
1270
1271 struct sctp_tcb *
1272 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1273     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1274 {
1275         struct sctpasochead *head;
1276         struct sctp_inpcb *inp;
1277         struct sctp_tcb *stcb = NULL;
1278         struct sctp_nets *net;
1279         uint16_t rport;
1280
1281         inp = *inp_p;
1282         switch (remote->sa_family) {
1283 #ifdef INET
1284         case AF_INET:
1285                 rport = (((struct sockaddr_in *)remote)->sin_port);
1286                 break;
1287 #endif
1288 #ifdef INET6
1289         case AF_INET6:
1290                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1291                 break;
1292 #endif
1293         default:
1294                 return (NULL);
1295         }
1296         if (locked_tcb) {
1297                 /*
1298                  * UN-lock so we can do proper locking here this occurs when
1299                  * called from load_addresses_from_init.
1300                  */
1301                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1302                 SCTP_TCB_UNLOCK(locked_tcb);
1303         }
1304         SCTP_INP_INFO_RLOCK();
1305         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1306             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1307                 /*-
1308                  * Now either this guy is our listener or it's the
1309                  * connector. If it is the one that issued the connect, then
1310                  * it's only chance is to be the first TCB in the list. If
1311                  * it is the acceptor, then do the special_lookup to hash
1312                  * and find the real inp.
1313                  */
1314                 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) {
1315                         /* to is peer addr, from is my addr */
1316                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1317                             netp, inp->def_vrf_id);
1318                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1319                                 /* we have a locked tcb, lower refcount */
1320                                 SCTP_INP_DECR_REF(inp);
1321                         }
1322                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1323                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1324                                 SCTP_TCB_LOCK(locked_tcb);
1325                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1326                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1327                         }
1328                         SCTP_INP_INFO_RUNLOCK();
1329                         return (stcb);
1330                 } else {
1331                         SCTP_INP_WLOCK(inp);
1332                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1333                                 goto null_return;
1334                         }
1335                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1336                         if (stcb == NULL) {
1337                                 goto null_return;
1338                         }
1339                         SCTP_TCB_LOCK(stcb);
1340
1341                         if (stcb->rport != rport) {
1342                                 /* remote port does not match. */
1343                                 SCTP_TCB_UNLOCK(stcb);
1344                                 goto null_return;
1345                         }
1346                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1347                                 SCTP_TCB_UNLOCK(stcb);
1348                                 goto null_return;
1349                         }
1350                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1351                                 SCTP_TCB_UNLOCK(stcb);
1352                                 goto null_return;
1353                         }
1354                         /* now look at the list of remote addresses */
1355                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1356 #ifdef INVARIANTS
1357                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1358                                         panic("Corrupt net list");
1359                                 }
1360 #endif
1361                                 if (net->ro._l_addr.sa.sa_family !=
1362                                     remote->sa_family) {
1363                                         /* not the same family */
1364                                         continue;
1365                                 }
1366                                 switch (remote->sa_family) {
1367 #ifdef INET
1368                                 case AF_INET:
1369                                         {
1370                                                 struct sockaddr_in *sin,
1371                                                            *rsin;
1372
1373                                                 sin = (struct sockaddr_in *)
1374                                                     &net->ro._l_addr;
1375                                                 rsin = (struct sockaddr_in *)remote;
1376                                                 if (sin->sin_addr.s_addr ==
1377                                                     rsin->sin_addr.s_addr) {
1378                                                         /* found it */
1379                                                         if (netp != NULL) {
1380                                                                 *netp = net;
1381                                                         }
1382                                                         if (locked_tcb == NULL) {
1383                                                                 SCTP_INP_DECR_REF(inp);
1384                                                         } else if (locked_tcb != stcb) {
1385                                                                 SCTP_TCB_LOCK(locked_tcb);
1386                                                         }
1387                                                         if (locked_tcb) {
1388                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1389                                                         }
1390                                                         SCTP_INP_WUNLOCK(inp);
1391                                                         SCTP_INP_INFO_RUNLOCK();
1392                                                         return (stcb);
1393                                                 }
1394                                                 break;
1395                                         }
1396 #endif
1397 #ifdef INET6
1398                                 case AF_INET6:
1399                                         {
1400                                                 struct sockaddr_in6 *sin6,
1401                                                             *rsin6;
1402
1403                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1404                                                 rsin6 = (struct sockaddr_in6 *)remote;
1405                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1406                                                     rsin6)) {
1407                                                         /* found it */
1408                                                         if (netp != NULL) {
1409                                                                 *netp = net;
1410                                                         }
1411                                                         if (locked_tcb == NULL) {
1412                                                                 SCTP_INP_DECR_REF(inp);
1413                                                         } else if (locked_tcb != stcb) {
1414                                                                 SCTP_TCB_LOCK(locked_tcb);
1415                                                         }
1416                                                         if (locked_tcb) {
1417                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1418                                                         }
1419                                                         SCTP_INP_WUNLOCK(inp);
1420                                                         SCTP_INP_INFO_RUNLOCK();
1421                                                         return (stcb);
1422                                                 }
1423                                                 break;
1424                                         }
1425 #endif
1426                                 default:
1427                                         /* TSNH */
1428                                         break;
1429                                 }
1430                         }
1431                         SCTP_TCB_UNLOCK(stcb);
1432                 }
1433         } else {
1434                 SCTP_INP_WLOCK(inp);
1435                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1436                         goto null_return;
1437                 }
1438                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1439                     inp->sctp_hashmark)];
1440                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1441                         if (stcb->rport != rport) {
1442                                 /* remote port does not match */
1443                                 continue;
1444                         }
1445                         SCTP_TCB_LOCK(stcb);
1446                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1447                                 SCTP_TCB_UNLOCK(stcb);
1448                                 continue;
1449                         }
1450                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1451                                 SCTP_TCB_UNLOCK(stcb);
1452                                 continue;
1453                         }
1454                         /* now look at the list of remote addresses */
1455                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1456 #ifdef INVARIANTS
1457                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1458                                         panic("Corrupt net list");
1459                                 }
1460 #endif
1461                                 if (net->ro._l_addr.sa.sa_family !=
1462                                     remote->sa_family) {
1463                                         /* not the same family */
1464                                         continue;
1465                                 }
1466                                 switch (remote->sa_family) {
1467 #ifdef INET
1468                                 case AF_INET:
1469                                         {
1470                                                 struct sockaddr_in *sin,
1471                                                            *rsin;
1472
1473                                                 sin = (struct sockaddr_in *)
1474                                                     &net->ro._l_addr;
1475                                                 rsin = (struct sockaddr_in *)remote;
1476                                                 if (sin->sin_addr.s_addr ==
1477                                                     rsin->sin_addr.s_addr) {
1478                                                         /* found it */
1479                                                         if (netp != NULL) {
1480                                                                 *netp = net;
1481                                                         }
1482                                                         if (locked_tcb == NULL) {
1483                                                                 SCTP_INP_DECR_REF(inp);
1484                                                         } else if (locked_tcb != stcb) {
1485                                                                 SCTP_TCB_LOCK(locked_tcb);
1486                                                         }
1487                                                         if (locked_tcb) {
1488                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1489                                                         }
1490                                                         SCTP_INP_WUNLOCK(inp);
1491                                                         SCTP_INP_INFO_RUNLOCK();
1492                                                         return (stcb);
1493                                                 }
1494                                                 break;
1495                                         }
1496 #endif
1497 #ifdef INET6
1498                                 case AF_INET6:
1499                                         {
1500                                                 struct sockaddr_in6 *sin6,
1501                                                             *rsin6;
1502
1503                                                 sin6 = (struct sockaddr_in6 *)
1504                                                     &net->ro._l_addr;
1505                                                 rsin6 = (struct sockaddr_in6 *)remote;
1506                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1507                                                     rsin6)) {
1508                                                         /* found it */
1509                                                         if (netp != NULL) {
1510                                                                 *netp = net;
1511                                                         }
1512                                                         if (locked_tcb == NULL) {
1513                                                                 SCTP_INP_DECR_REF(inp);
1514                                                         } else if (locked_tcb != stcb) {
1515                                                                 SCTP_TCB_LOCK(locked_tcb);
1516                                                         }
1517                                                         if (locked_tcb) {
1518                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1519                                                         }
1520                                                         SCTP_INP_WUNLOCK(inp);
1521                                                         SCTP_INP_INFO_RUNLOCK();
1522                                                         return (stcb);
1523                                                 }
1524                                                 break;
1525                                         }
1526 #endif
1527                                 default:
1528                                         /* TSNH */
1529                                         break;
1530                                 }
1531                         }
1532                         SCTP_TCB_UNLOCK(stcb);
1533                 }
1534         }
1535 null_return:
1536         /* clean up for returning null */
1537         if (locked_tcb) {
1538                 SCTP_TCB_LOCK(locked_tcb);
1539                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1540         }
1541         SCTP_INP_WUNLOCK(inp);
1542         SCTP_INP_INFO_RUNLOCK();
1543         /* not found */
1544         return (NULL);
1545 }
1546
1547
1548 /*
1549  * Find an association for a specific endpoint using the association id given
1550  * out in the COMM_UP notification
1551  */
1552 struct sctp_tcb *
1553 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1554 {
1555         /*
1556          * Use my the assoc_id to find a endpoint
1557          */
1558         struct sctpasochead *head;
1559         struct sctp_tcb *stcb;
1560         uint32_t id;
1561
1562         if (inp == NULL) {
1563                 SCTP_PRINTF("TSNH ep_associd\n");
1564                 return (NULL);
1565         }
1566         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1567                 SCTP_PRINTF("TSNH ep_associd0\n");
1568                 return (NULL);
1569         }
1570         id = (uint32_t)asoc_id;
1571         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1572         if (head == NULL) {
1573                 /* invalid id TSNH */
1574                 SCTP_PRINTF("TSNH ep_associd1\n");
1575                 return (NULL);
1576         }
1577         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1578                 if (stcb->asoc.assoc_id == id) {
1579                         if (inp != stcb->sctp_ep) {
1580                                 /*
1581                                  * some other guy has the same id active (id
1582                                  * collision ??).
1583                                  */
1584                                 SCTP_PRINTF("TSNH ep_associd2\n");
1585                                 continue;
1586                         }
1587                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1588                                 continue;
1589                         }
1590                         if (want_lock) {
1591                                 SCTP_TCB_LOCK(stcb);
1592                         }
1593                         return (stcb);
1594                 }
1595         }
1596         return (NULL);
1597 }
1598
1599
1600 struct sctp_tcb *
1601 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1602 {
1603         struct sctp_tcb *stcb;
1604
1605         SCTP_INP_RLOCK(inp);
1606         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1607         SCTP_INP_RUNLOCK(inp);
1608         return (stcb);
1609 }
1610
1611
1612 /*
1613  * Endpoint probe expects that the INP_INFO is locked.
1614  */
1615 static struct sctp_inpcb *
1616 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1617     uint16_t lport, uint32_t vrf_id)
1618 {
1619         struct sctp_inpcb *inp;
1620         struct sctp_laddr *laddr;
1621 #ifdef INET
1622         struct sockaddr_in *sin;
1623 #endif
1624 #ifdef INET6
1625         struct sockaddr_in6 *sin6;
1626         struct sockaddr_in6 *intf_addr6;
1627 #endif
1628         int fnd;
1629
1630 #ifdef INET
1631         sin = NULL;
1632 #endif
1633 #ifdef INET6
1634         sin6 = NULL;
1635 #endif
1636         switch (nam->sa_family) {
1637 #ifdef INET
1638         case AF_INET:
1639                 sin = (struct sockaddr_in *)nam;
1640                 break;
1641 #endif
1642 #ifdef INET6
1643         case AF_INET6:
1644                 sin6 = (struct sockaddr_in6 *)nam;
1645                 break;
1646 #endif
1647         default:
1648                 /* unsupported family */
1649                 return (NULL);
1650         }
1651
1652         if (head == NULL)
1653                 return (NULL);
1654
1655         LIST_FOREACH(inp, head, sctp_hash) {
1656                 SCTP_INP_RLOCK(inp);
1657                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1658                         SCTP_INP_RUNLOCK(inp);
1659                         continue;
1660                 }
1661                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1662                     (inp->sctp_lport == lport)) {
1663                         /* got it */
1664                         switch (nam->sa_family) {
1665 #ifdef INET
1666                         case AF_INET:
1667                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1668                                     SCTP_IPV6_V6ONLY(inp)) {
1669                                         /*
1670                                          * IPv4 on a IPv6 socket with ONLY
1671                                          * IPv6 set
1672                                          */
1673                                         SCTP_INP_RUNLOCK(inp);
1674                                         continue;
1675                                 }
1676                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1677                                     &sin->sin_addr) != 0) {
1678                                         SCTP_INP_RUNLOCK(inp);
1679                                         continue;
1680                                 }
1681                                 break;
1682 #endif
1683 #ifdef INET6
1684                         case AF_INET6:
1685                                 /*
1686                                  * A V6 address and the endpoint is NOT
1687                                  * bound V6
1688                                  */
1689                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1690                                         SCTP_INP_RUNLOCK(inp);
1691                                         continue;
1692                                 }
1693                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1694                                     &sin6->sin6_addr) != 0) {
1695                                         SCTP_INP_RUNLOCK(inp);
1696                                         continue;
1697                                 }
1698                                 break;
1699 #endif
1700                         default:
1701                                 break;
1702                         }
1703                         /* does a VRF id match? */
1704                         fnd = 0;
1705                         if (inp->def_vrf_id == vrf_id)
1706                                 fnd = 1;
1707
1708                         SCTP_INP_RUNLOCK(inp);
1709                         if (!fnd)
1710                                 continue;
1711                         return (inp);
1712                 }
1713                 SCTP_INP_RUNLOCK(inp);
1714         }
1715         switch (nam->sa_family) {
1716 #ifdef INET
1717         case AF_INET:
1718                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1719                         /* Can't hunt for one that has no address specified */
1720                         return (NULL);
1721                 }
1722                 break;
1723 #endif
1724 #ifdef INET6
1725         case AF_INET6:
1726                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1727                         /* Can't hunt for one that has no address specified */
1728                         return (NULL);
1729                 }
1730                 break;
1731 #endif
1732         default:
1733                 break;
1734         }
1735         /*
1736          * ok, not bound to all so see if we can find a EP bound to this
1737          * address.
1738          */
1739         LIST_FOREACH(inp, head, sctp_hash) {
1740                 SCTP_INP_RLOCK(inp);
1741                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1742                         SCTP_INP_RUNLOCK(inp);
1743                         continue;
1744                 }
1745                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1746                         SCTP_INP_RUNLOCK(inp);
1747                         continue;
1748                 }
1749                 /*
1750                  * Ok this could be a likely candidate, look at all of its
1751                  * addresses
1752                  */
1753                 if (inp->sctp_lport != lport) {
1754                         SCTP_INP_RUNLOCK(inp);
1755                         continue;
1756                 }
1757                 /* does a VRF id match? */
1758                 fnd = 0;
1759                 if (inp->def_vrf_id == vrf_id)
1760                         fnd = 1;
1761
1762                 if (!fnd) {
1763                         SCTP_INP_RUNLOCK(inp);
1764                         continue;
1765                 }
1766                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1767                         if (laddr->ifa == NULL) {
1768                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1769                                     __func__);
1770                                 continue;
1771                         }
1772                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1773                             (void *)laddr->ifa);
1774                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1775                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1776                                 continue;
1777                         }
1778                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1779                                 /* possible, see if it matches */
1780                                 switch (nam->sa_family) {
1781 #ifdef INET
1782                                 case AF_INET:
1783                                         if (sin->sin_addr.s_addr ==
1784                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1785                                                 SCTP_INP_RUNLOCK(inp);
1786                                                 return (inp);
1787                                         }
1788                                         break;
1789 #endif
1790 #ifdef INET6
1791                                 case AF_INET6:
1792                                         intf_addr6 = &laddr->ifa->address.sin6;
1793                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1794                                             intf_addr6)) {
1795                                                 SCTP_INP_RUNLOCK(inp);
1796                                                 return (inp);
1797                                         }
1798                                         break;
1799 #endif
1800                                 }
1801                         }
1802                 }
1803                 SCTP_INP_RUNLOCK(inp);
1804         }
1805         return (NULL);
1806 }
1807
1808
1809 static struct sctp_inpcb *
1810 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1811 {
1812         struct sctppcbhead *head;
1813         struct sctp_inpcb *t_inp;
1814         int fnd;
1815
1816         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1817             SCTP_BASE_INFO(hashmark))];
1818         LIST_FOREACH(t_inp, head, sctp_hash) {
1819                 if (t_inp->sctp_lport != lport) {
1820                         continue;
1821                 }
1822                 /* is it in the VRF in question */
1823                 fnd = 0;
1824                 if (t_inp->def_vrf_id == vrf_id)
1825                         fnd = 1;
1826                 if (!fnd)
1827                         continue;
1828
1829                 /* This one is in use. */
1830                 /* check the v6/v4 binding issue */
1831                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1832                     SCTP_IPV6_V6ONLY(t_inp)) {
1833                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1834                                 /* collision in V6 space */
1835                                 return (t_inp);
1836                         } else {
1837                                 /* inp is BOUND_V4 no conflict */
1838                                 continue;
1839                         }
1840                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1841                         /* t_inp is bound v4 and v6, conflict always */
1842                         return (t_inp);
1843                 } else {
1844                         /* t_inp is bound only V4 */
1845                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1846                             SCTP_IPV6_V6ONLY(inp)) {
1847                                 /* no conflict */
1848                                 continue;
1849                         }
1850                         /* else fall through to conflict */
1851                 }
1852                 return (t_inp);
1853         }
1854         return (NULL);
1855 }
1856
1857
1858 int
1859 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1860 {
1861         /* For 1-2-1 with port reuse */
1862         struct sctppcbhead *head;
1863         struct sctp_inpcb *tinp, *ninp;
1864
1865         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1866                 /* only works with port reuse on */
1867                 return (-1);
1868         }
1869         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1870                 return (0);
1871         }
1872         SCTP_INP_RUNLOCK(inp);
1873         SCTP_INP_INFO_WLOCK();
1874         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1875             SCTP_BASE_INFO(hashmark))];
1876         /* Kick out all non-listeners to the TCP hash */
1877         LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1878                 if (tinp->sctp_lport != inp->sctp_lport) {
1879                         continue;
1880                 }
1881                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1882                         continue;
1883                 }
1884                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1885                         continue;
1886                 }
1887                 if (SCTP_IS_LISTENING(tinp)) {
1888                         continue;
1889                 }
1890                 SCTP_INP_WLOCK(tinp);
1891                 LIST_REMOVE(tinp, sctp_hash);
1892                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1893                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1894                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1895                 SCTP_INP_WUNLOCK(tinp);
1896         }
1897         SCTP_INP_WLOCK(inp);
1898         /* Pull from where he was */
1899         LIST_REMOVE(inp, sctp_hash);
1900         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1901         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1902         LIST_INSERT_HEAD(head, inp, sctp_hash);
1903         SCTP_INP_WUNLOCK(inp);
1904         SCTP_INP_RLOCK(inp);
1905         SCTP_INP_INFO_WUNLOCK();
1906         return (0);
1907 }
1908
1909
1910 struct sctp_inpcb *
1911 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1912     uint32_t vrf_id)
1913 {
1914         /*
1915          * First we check the hash table to see if someone has this port
1916          * bound with just the port.
1917          */
1918         struct sctp_inpcb *inp;
1919         struct sctppcbhead *head;
1920         int lport;
1921         unsigned int i;
1922 #ifdef INET
1923         struct sockaddr_in *sin;
1924 #endif
1925 #ifdef INET6
1926         struct sockaddr_in6 *sin6;
1927 #endif
1928
1929         switch (nam->sa_family) {
1930 #ifdef INET
1931         case AF_INET:
1932                 sin = (struct sockaddr_in *)nam;
1933                 lport = sin->sin_port;
1934                 break;
1935 #endif
1936 #ifdef INET6
1937         case AF_INET6:
1938                 sin6 = (struct sockaddr_in6 *)nam;
1939                 lport = sin6->sin6_port;
1940                 break;
1941 #endif
1942         default:
1943                 return (NULL);
1944         }
1945         /*
1946          * I could cheat here and just cast to one of the types but we will
1947          * do it right. It also provides the check against an Unsupported
1948          * type too.
1949          */
1950         /* Find the head of the ALLADDR chain */
1951         if (have_lock == 0) {
1952                 SCTP_INP_INFO_RLOCK();
1953         }
1954         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1955             SCTP_BASE_INFO(hashmark))];
1956         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1957
1958         /*
1959          * If the TCP model exists it could be that the main listening
1960          * endpoint is gone but there still exists a connected socket for
1961          * this guy. If so we can return the first one that we find. This
1962          * may NOT be the correct one so the caller should be wary on the
1963          * returned INP. Currently the only caller that sets find_tcp_pool
1964          * is in bindx where we are verifying that a user CAN bind the
1965          * address. He either has bound it already, or someone else has, or
1966          * its open to bind, so this is good enough.
1967          */
1968         if (inp == NULL && find_tcp_pool) {
1969                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1970                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1971                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1972                         if (inp) {
1973                                 break;
1974                         }
1975                 }
1976         }
1977         if (inp) {
1978                 SCTP_INP_INCR_REF(inp);
1979         }
1980         if (have_lock == 0) {
1981                 SCTP_INP_INFO_RUNLOCK();
1982         }
1983         return (inp);
1984 }
1985
1986
1987 /*
1988  * Find an association for an endpoint with the pointer to whom you want to
1989  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1990  * need to change the *to to some other struct like a mbuf...
1991  */
1992 struct sctp_tcb *
1993 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
1994     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1995     uint32_t vrf_id)
1996 {
1997         struct sctp_inpcb *inp = NULL;
1998         struct sctp_tcb *stcb;
1999
2000         SCTP_INP_INFO_RLOCK();
2001         if (find_tcp_pool) {
2002                 if (inp_p != NULL) {
2003                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2004                             vrf_id);
2005                 } else {
2006                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2007                             vrf_id);
2008                 }
2009                 if (stcb != NULL) {
2010                         SCTP_INP_INFO_RUNLOCK();
2011                         return (stcb);
2012                 }
2013         }
2014         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2015         if (inp_p != NULL) {
2016                 *inp_p = inp;
2017         }
2018         SCTP_INP_INFO_RUNLOCK();
2019         if (inp == NULL) {
2020                 return (NULL);
2021         }
2022         /*
2023          * ok, we have an endpoint, now lets find the assoc for it (if any)
2024          * we now place the source address or from in the to of the find
2025          * endpoint call. Since in reality this chain is used from the
2026          * inbound packet side.
2027          */
2028         if (inp_p != NULL) {
2029                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2030                     NULL);
2031         } else {
2032                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2033                     NULL);
2034         }
2035         return (stcb);
2036 }
2037
2038
2039 /*
2040  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2041  * find all addresses that the sender has specified in any address list. Each
2042  * address will be used to lookup the TCB and see if one exits.
2043  */
2044 static struct sctp_tcb *
2045 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2046     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2047     struct sockaddr *dst)
2048 {
2049         struct sctp_paramhdr *phdr, param_buf;
2050 #if defined(INET) || defined(INET6)
2051         struct sctp_tcb *stcb;
2052         uint16_t ptype;
2053 #endif
2054         uint16_t plen;
2055 #ifdef INET
2056         struct sockaddr_in sin4;
2057 #endif
2058 #ifdef INET6
2059         struct sockaddr_in6 sin6;
2060 #endif
2061
2062 #ifdef INET
2063         memset(&sin4, 0, sizeof(sin4));
2064         sin4.sin_len = sizeof(sin4);
2065         sin4.sin_family = AF_INET;
2066         sin4.sin_port = sh->src_port;
2067 #endif
2068 #ifdef INET6
2069         memset(&sin6, 0, sizeof(sin6));
2070         sin6.sin6_len = sizeof(sin6);
2071         sin6.sin6_family = AF_INET6;
2072         sin6.sin6_port = sh->src_port;
2073 #endif
2074
2075         offset += sizeof(struct sctp_init_chunk);
2076
2077         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
2078         while (phdr != NULL) {
2079                 /* now we must see if we want the parameter */
2080 #if defined(INET) || defined(INET6)
2081                 ptype = ntohs(phdr->param_type);
2082 #endif
2083                 plen = ntohs(phdr->param_length);
2084                 if (plen == 0) {
2085                         break;
2086                 }
2087 #ifdef INET
2088                 if (ptype == SCTP_IPV4_ADDRESS &&
2089                     plen == sizeof(struct sctp_ipv4addr_param)) {
2090                         /* Get the rest of the address */
2091                         struct sctp_ipv4addr_param ip4_param, *p4;
2092
2093                         phdr = sctp_get_next_param(m, offset,
2094                             (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param));
2095                         if (phdr == NULL) {
2096                                 return (NULL);
2097                         }
2098                         p4 = (struct sctp_ipv4addr_param *)phdr;
2099                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2100                         /* look it up */
2101                         stcb = sctp_findassociation_ep_addr(inp_p,
2102                             (struct sockaddr *)&sin4, netp, dst, NULL);
2103                         if (stcb != NULL) {
2104                                 return (stcb);
2105                         }
2106                 }
2107 #endif
2108 #ifdef INET6
2109                 if (ptype == SCTP_IPV6_ADDRESS &&
2110                     plen == sizeof(struct sctp_ipv6addr_param)) {
2111                         /* Get the rest of the address */
2112                         struct sctp_ipv6addr_param ip6_param, *p6;
2113
2114                         phdr = sctp_get_next_param(m, offset,
2115                             (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param));
2116                         if (phdr == NULL) {
2117                                 return (NULL);
2118                         }
2119                         p6 = (struct sctp_ipv6addr_param *)phdr;
2120                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2121                         /* look it up */
2122                         stcb = sctp_findassociation_ep_addr(inp_p,
2123                             (struct sockaddr *)&sin6, netp, dst, NULL);
2124                         if (stcb != NULL) {
2125                                 return (stcb);
2126                         }
2127                 }
2128 #endif
2129                 offset += SCTP_SIZE32(plen);
2130                 phdr = sctp_get_next_param(m, offset, &param_buf,
2131                     sizeof(param_buf));
2132         }
2133         return (NULL);
2134 }
2135
2136 static struct sctp_tcb *
2137 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2138     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2139     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2140 {
2141         /*
2142          * Use my vtag to hash. If we find it we then verify the source addr
2143          * is in the assoc. If all goes well we save a bit on rec of a
2144          * packet.
2145          */
2146         struct sctpasochead *head;
2147         struct sctp_nets *net;
2148         struct sctp_tcb *stcb;
2149
2150         SCTP_INP_INFO_RLOCK();
2151         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2152             SCTP_BASE_INFO(hashasocmark))];
2153         LIST_FOREACH(stcb, head, sctp_asocs) {
2154                 SCTP_INP_RLOCK(stcb->sctp_ep);
2155                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2156                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2157                         continue;
2158                 }
2159                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2160                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2161                         continue;
2162                 }
2163                 SCTP_TCB_LOCK(stcb);
2164                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2165                 if (stcb->asoc.my_vtag == vtag) {
2166                         /* candidate */
2167                         if (stcb->rport != rport) {
2168                                 SCTP_TCB_UNLOCK(stcb);
2169                                 continue;
2170                         }
2171                         if (stcb->sctp_ep->sctp_lport != lport) {
2172                                 SCTP_TCB_UNLOCK(stcb);
2173                                 continue;
2174                         }
2175                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2176                                 SCTP_TCB_UNLOCK(stcb);
2177                                 continue;
2178                         }
2179                         /* RRS:Need toaddr check here */
2180                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2181                                 /* Endpoint does not own this address */
2182                                 SCTP_TCB_UNLOCK(stcb);
2183                                 continue;
2184                         }
2185                         if (remote_tag) {
2186                                 /*
2187                                  * If we have both vtags that's all we match
2188                                  * on
2189                                  */
2190                                 if (stcb->asoc.peer_vtag == remote_tag) {
2191                                         /*
2192                                          * If both tags match we consider it
2193                                          * conclusive and check NO
2194                                          * source/destination addresses
2195                                          */
2196                                         goto conclusive;
2197                                 }
2198                         }
2199                         if (skip_src_check) {
2200                 conclusive:
2201                                 if (from) {
2202                                         *netp = sctp_findnet(stcb, from);
2203                                 } else {
2204                                         *netp = NULL;   /* unknown */
2205                                 }
2206                                 if (inp_p)
2207                                         *inp_p = stcb->sctp_ep;
2208                                 SCTP_INP_INFO_RUNLOCK();
2209                                 return (stcb);
2210                         }
2211                         net = sctp_findnet(stcb, from);
2212                         if (net) {
2213                                 /* yep its him. */
2214                                 *netp = net;
2215                                 SCTP_STAT_INCR(sctps_vtagexpress);
2216                                 *inp_p = stcb->sctp_ep;
2217                                 SCTP_INP_INFO_RUNLOCK();
2218                                 return (stcb);
2219                         } else {
2220                                 /*
2221                                  * not him, this should only happen in rare
2222                                  * cases so I peg it.
2223                                  */
2224                                 SCTP_STAT_INCR(sctps_vtagbogus);
2225                         }
2226                 }
2227                 SCTP_TCB_UNLOCK(stcb);
2228         }
2229         SCTP_INP_INFO_RUNLOCK();
2230         return (NULL);
2231 }
2232
2233
2234 /*
2235  * Find an association with the pointer to the inbound IP packet. This can be
2236  * a IPv4 or IPv6 packet.
2237  */
2238 struct sctp_tcb *
2239 sctp_findassociation_addr(struct mbuf *m, int offset,
2240     struct sockaddr *src, struct sockaddr *dst,
2241     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2242     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2243 {
2244         struct sctp_tcb *stcb;
2245         struct sctp_inpcb *inp;
2246
2247         if (sh->v_tag) {
2248                 /* we only go down this path if vtag is non-zero */
2249                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2250                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2251                 if (stcb) {
2252                         return (stcb);
2253                 }
2254         }
2255         if (inp_p) {
2256                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2257                     1, vrf_id);
2258                 inp = *inp_p;
2259         } else {
2260                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2261                     1, vrf_id);
2262         }
2263         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2264         if (stcb == NULL && inp) {
2265                 /* Found a EP but not this address */
2266                 if ((ch->chunk_type == SCTP_INITIATION) ||
2267                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2268                         /*-
2269                          * special hook, we do NOT return linp or an
2270                          * association that is linked to an existing
2271                          * association that is under the TCP pool (i.e. no
2272                          * listener exists). The endpoint finding routine
2273                          * will always find a listener before examining the
2274                          * TCP pool.
2275                          */
2276                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2277                                 if (inp_p) {
2278                                         *inp_p = NULL;
2279                                 }
2280                                 return (NULL);
2281                         }
2282                         stcb = sctp_findassociation_special_addr(m,
2283                             offset, sh, &inp, netp, dst);
2284                         if (inp_p != NULL) {
2285                                 *inp_p = inp;
2286                         }
2287                 }
2288         }
2289         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2290         return (stcb);
2291 }
2292
2293 /*
2294  * lookup an association by an ASCONF lookup address.
2295  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2296  */
2297 struct sctp_tcb *
2298 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2299     struct sockaddr *dst, struct sctphdr *sh,
2300     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2301 {
2302         struct sctp_tcb *stcb;
2303         union sctp_sockstore remote_store;
2304         struct sctp_paramhdr param_buf, *phdr;
2305         int ptype;
2306         int zero_address = 0;
2307 #ifdef INET
2308         struct sockaddr_in *sin;
2309 #endif
2310 #ifdef INET6
2311         struct sockaddr_in6 *sin6;
2312 #endif
2313
2314         memset(&remote_store, 0, sizeof(remote_store));
2315         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2316             &param_buf, sizeof(struct sctp_paramhdr));
2317         if (phdr == NULL) {
2318                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2319                     __func__);
2320                 return NULL;
2321         }
2322         ptype = (int)((uint32_t)ntohs(phdr->param_type));
2323         /* get the correlation address */
2324         switch (ptype) {
2325 #ifdef INET6
2326         case SCTP_IPV6_ADDRESS:
2327                 {
2328                         /* ipv6 address param */
2329                         struct sctp_ipv6addr_param *p6, p6_buf;
2330
2331                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2332                                 return NULL;
2333                         }
2334                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2335                             offset + sizeof(struct sctp_asconf_chunk),
2336                             &p6_buf.ph, sizeof(p6_buf));
2337                         if (p6 == NULL) {
2338                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2339                                     __func__);
2340                                 return (NULL);
2341                         }
2342                         sin6 = &remote_store.sin6;
2343                         sin6->sin6_family = AF_INET6;
2344                         sin6->sin6_len = sizeof(*sin6);
2345                         sin6->sin6_port = sh->src_port;
2346                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2347                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2348                                 zero_address = 1;
2349                         break;
2350                 }
2351 #endif
2352 #ifdef INET
2353         case SCTP_IPV4_ADDRESS:
2354                 {
2355                         /* ipv4 address param */
2356                         struct sctp_ipv4addr_param *p4, p4_buf;
2357
2358                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2359                                 return NULL;
2360                         }
2361                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2362                             offset + sizeof(struct sctp_asconf_chunk),
2363                             &p4_buf.ph, sizeof(p4_buf));
2364                         if (p4 == NULL) {
2365                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2366                                     __func__);
2367                                 return (NULL);
2368                         }
2369                         sin = &remote_store.sin;
2370                         sin->sin_family = AF_INET;
2371                         sin->sin_len = sizeof(*sin);
2372                         sin->sin_port = sh->src_port;
2373                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2374                         if (sin->sin_addr.s_addr == INADDR_ANY)
2375                                 zero_address = 1;
2376                         break;
2377                 }
2378 #endif
2379         default:
2380                 /* invalid address param type */
2381                 return NULL;
2382         }
2383
2384         if (zero_address) {
2385                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2386                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2387                 if (stcb != NULL) {
2388                         SCTP_INP_DECR_REF(*inp_p);
2389                 }
2390         } else {
2391                 stcb = sctp_findassociation_ep_addr(inp_p,
2392                     &remote_store.sa, netp,
2393                     dst, NULL);
2394         }
2395         return (stcb);
2396 }
2397
2398
2399 /*
2400  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2401  * addresses. This way if we don't get a bind we by default pick a ephemeral
2402  * port with all addresses bound.
2403  */
2404 int
2405 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2406 {
2407         /*
2408          * we get called when a new endpoint starts up. We need to allocate
2409          * the sctp_inpcb structure from the zone and init it. Mark it as
2410          * unbound and find a port that we can use as an ephemeral with
2411          * INADDR_ANY. If the user binds later no problem we can then add in
2412          * the specific addresses. And setup the default parameters for the
2413          * EP.
2414          */
2415         int i, error;
2416         struct sctp_inpcb *inp;
2417         struct sctp_pcb *m;
2418         struct timeval time;
2419         sctp_sharedkey_t *null_key;
2420
2421         error = 0;
2422
2423         SCTP_INP_INFO_WLOCK();
2424         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2425         if (inp == NULL) {
2426                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2427                 SCTP_INP_INFO_WUNLOCK();
2428                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2429                 return (ENOBUFS);
2430         }
2431         /* zap it */
2432         memset(inp, 0, sizeof(*inp));
2433
2434         /* bump generations */
2435         /* setup socket pointers */
2436         inp->sctp_socket = so;
2437         inp->ip_inp.inp.inp_socket = so;
2438         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2439 #ifdef INET6
2440         if (INP_SOCKAF(so) == AF_INET6) {
2441                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2442                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2443                 }
2444                 if (MODULE_GLOBAL(ip6_v6only)) {
2445                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2446                 }
2447         }
2448 #endif
2449         inp->sctp_associd_counter = 1;
2450         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2451         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2452         inp->max_cwnd = 0;
2453         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2454         inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable);
2455         inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable);
2456         inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable);
2457         inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable);
2458         inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2459         inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2460         inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2461         inp->idata_supported = 0;
2462
2463         inp->fibnum = so->so_fibnum;
2464         /* init the small hash table we use to track asocid <-> tcb */
2465         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2466         if (inp->sctp_asocidhash == NULL) {
2467                 crfree(inp->ip_inp.inp.inp_cred);
2468                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2469                 SCTP_INP_INFO_WUNLOCK();
2470                 return (ENOBUFS);
2471         }
2472         SCTP_INCR_EP_COUNT();
2473         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2474         SCTP_INP_INFO_WUNLOCK();
2475
2476         so->so_pcb = (caddr_t)inp;
2477
2478         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2479                 /* UDP style socket */
2480                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2481                     SCTP_PCB_FLAGS_UNBOUND);
2482                 /* Be sure it is NON-BLOCKING IO for UDP */
2483                 /* SCTP_SET_SO_NBIO(so); */
2484         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2485                 /* TCP style socket */
2486                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2487                     SCTP_PCB_FLAGS_UNBOUND);
2488                 /* Be sure we have blocking IO by default */
2489                 SOCK_LOCK(so);
2490                 SCTP_CLEAR_SO_NBIO(so);
2491                 SOCK_UNLOCK(so);
2492         } else {
2493                 /*
2494                  * unsupported socket type (RAW, etc)- in case we missed it
2495                  * in protosw
2496                  */
2497                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2498                 so->so_pcb = NULL;
2499                 crfree(inp->ip_inp.inp.inp_cred);
2500                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2501                 return (EOPNOTSUPP);
2502         }
2503         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2504                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2505                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2506         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2507                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2508                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2509         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2510                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2511                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2512         }
2513         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2514             &inp->sctp_hashmark);
2515         if (inp->sctp_tcbhash == NULL) {
2516                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2517                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2518                 so->so_pcb = NULL;
2519                 crfree(inp->ip_inp.inp.inp_cred);
2520                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2521                 return (ENOBUFS);
2522         }
2523         inp->def_vrf_id = vrf_id;
2524
2525         SCTP_INP_INFO_WLOCK();
2526         SCTP_INP_LOCK_INIT(inp);
2527         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2528         SCTP_INP_READ_INIT(inp);
2529         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2530         /* lock the new ep */
2531         SCTP_INP_WLOCK(inp);
2532
2533         /* add it to the info area */
2534         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2535         SCTP_INP_INFO_WUNLOCK();
2536
2537         TAILQ_INIT(&inp->read_queue);
2538         LIST_INIT(&inp->sctp_addr_list);
2539
2540         LIST_INIT(&inp->sctp_asoc_list);
2541
2542 #ifdef SCTP_TRACK_FREED_ASOCS
2543         /* TEMP CODE */
2544         LIST_INIT(&inp->sctp_asoc_free_list);
2545 #endif
2546         /* Init the timer structure for signature change */
2547         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2548         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2549
2550         /* now init the actual endpoint default data */
2551         m = &inp->sctp_ep;
2552
2553         /* setup the base timeout information */
2554         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2555         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2556         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2557         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2558         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2559         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2560         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2561         /* all max/min max are in ms */
2562         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2563         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2564         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2565         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2566         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2567         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2568         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2569         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2570         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2571         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2572         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2573         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2574         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2575
2576         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2577         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2578         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2579         /* number of streams to pre-open on a association */
2580         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2581
2582         m->default_mtu = 0;
2583         /* Add adaptation cookie */
2584         m->adaptation_layer_indicator = 0;
2585         m->adaptation_layer_indicator_provided = 0;
2586
2587         /* seed random number generator */
2588         m->random_counter = 1;
2589         m->store_at = SCTP_SIGNATURE_SIZE;
2590         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2591         sctp_fill_random_store(m);
2592
2593         /* Minimum cookie size */
2594         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2595             sizeof(struct sctp_state_cookie);
2596         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2597
2598         /* Setup the initial secret */
2599         (void)SCTP_GETTIME_TIMEVAL(&time);
2600         m->time_of_secret_change = time.tv_sec;
2601
2602         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2603                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2604         }
2605         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2606
2607         /* How long is a cookie good for ? */
2608         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2609         /*
2610          * Initialize authentication parameters
2611          */
2612         m->local_hmacs = sctp_default_supported_hmaclist();
2613         m->local_auth_chunks = sctp_alloc_chunklist();
2614         if (inp->asconf_supported) {
2615                 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2616                 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2617         }
2618         m->default_dscp = 0;
2619 #ifdef INET6
2620         m->default_flowlabel = 0;
2621 #endif
2622         m->port = 0;            /* encapsulation disabled by default */
2623         LIST_INIT(&m->shared_keys);
2624         /* add default NULL key as key id 0 */
2625         null_key = sctp_alloc_sharedkey();
2626         sctp_insert_sharedkey(&m->shared_keys, null_key);
2627         SCTP_INP_WUNLOCK(inp);
2628 #ifdef SCTP_LOG_CLOSING
2629         sctp_log_closing(inp, NULL, 12);
2630 #endif
2631         return (error);
2632 }
2633
2634
2635 void
2636 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2637     struct sctp_tcb *stcb)
2638 {
2639         struct sctp_nets *net;
2640         uint16_t lport, rport;
2641         struct sctppcbhead *head;
2642         struct sctp_laddr *laddr, *oladdr;
2643
2644         atomic_add_int(&stcb->asoc.refcnt, 1);
2645         SCTP_TCB_UNLOCK(stcb);
2646         SCTP_INP_INFO_WLOCK();
2647         SCTP_INP_WLOCK(old_inp);
2648         SCTP_INP_WLOCK(new_inp);
2649         SCTP_TCB_LOCK(stcb);
2650         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2651
2652         new_inp->sctp_ep.time_of_secret_change =
2653             old_inp->sctp_ep.time_of_secret_change;
2654         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2655             sizeof(old_inp->sctp_ep.secret_key));
2656         new_inp->sctp_ep.current_secret_number =
2657             old_inp->sctp_ep.current_secret_number;
2658         new_inp->sctp_ep.last_secret_number =
2659             old_inp->sctp_ep.last_secret_number;
2660         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2661
2662         /* make it so new data pours into the new socket */
2663         stcb->sctp_socket = new_inp->sctp_socket;
2664         stcb->sctp_ep = new_inp;
2665
2666         /* Copy the port across */
2667         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2668         rport = stcb->rport;
2669         /* Pull the tcb from the old association */
2670         LIST_REMOVE(stcb, sctp_tcbhash);
2671         LIST_REMOVE(stcb, sctp_tcblist);
2672         if (stcb->asoc.in_asocid_hash) {
2673                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2674         }
2675         /* Now insert the new_inp into the TCP connected hash */
2676         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2677
2678         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2679         /* Its safe to access */
2680         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2681
2682         /* Now move the tcb into the endpoint list */
2683         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2684         /*
2685          * Question, do we even need to worry about the ep-hash since we
2686          * only have one connection? Probably not :> so lets get rid of it
2687          * and not suck up any kernel memory in that.
2688          */
2689         if (stcb->asoc.in_asocid_hash) {
2690                 struct sctpasochead *lhd;
2691
2692                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2693                     new_inp->hashasocidmark)];
2694                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2695         }
2696         /* Ok. Let's restart timer. */
2697         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2698                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2699                     stcb, net);
2700         }
2701
2702         SCTP_INP_INFO_WUNLOCK();
2703         if (new_inp->sctp_tcbhash != NULL) {
2704                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2705                 new_inp->sctp_tcbhash = NULL;
2706         }
2707         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2708                 /* Subset bound, so copy in the laddr list from the old_inp */
2709                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2710                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2711                         if (laddr == NULL) {
2712                                 /*
2713                                  * Gak, what can we do? This assoc is really
2714                                  * HOSED. We probably should send an abort
2715                                  * here.
2716                                  */
2717                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2718                                 continue;
2719                         }
2720                         SCTP_INCR_LADDR_COUNT();
2721                         memset(laddr, 0, sizeof(*laddr));
2722                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2723                         laddr->ifa = oladdr->ifa;
2724                         atomic_add_int(&laddr->ifa->refcount, 1);
2725                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2726                             sctp_nxt_addr);
2727                         new_inp->laddr_count++;
2728                         if (oladdr == stcb->asoc.last_used_address) {
2729                                 stcb->asoc.last_used_address = laddr;
2730                         }
2731                 }
2732         }
2733         /*
2734          * Now any running timers need to be adjusted since we really don't
2735          * care if they are running or not just blast in the new_inp into
2736          * all of them.
2737          */
2738
2739         stcb->asoc.dack_timer.ep = (void *)new_inp;
2740         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2741         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2742         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2743         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2744         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2745         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2746         /* now what about the nets? */
2747         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2748                 net->pmtu_timer.ep = (void *)new_inp;
2749                 net->hb_timer.ep = (void *)new_inp;
2750                 net->rxt_timer.ep = (void *)new_inp;
2751         }
2752         SCTP_INP_WUNLOCK(new_inp);
2753         SCTP_INP_WUNLOCK(old_inp);
2754 }
2755
2756 /*
2757  * insert an laddr entry with the given ifa for the desired list
2758  */
2759 static int
2760 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2761 {
2762         struct sctp_laddr *laddr;
2763
2764         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2765         if (laddr == NULL) {
2766                 /* out of memory? */
2767                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2768                 return (EINVAL);
2769         }
2770         SCTP_INCR_LADDR_COUNT();
2771         memset(laddr, 0, sizeof(*laddr));
2772         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2773         laddr->ifa = ifa;
2774         laddr->action = act;
2775         atomic_add_int(&ifa->refcount, 1);
2776         /* insert it */
2777         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2778
2779         return (0);
2780 }
2781
2782 /*
2783  * Remove an laddr entry from the local address list (on an assoc)
2784  */
2785 static void
2786 sctp_remove_laddr(struct sctp_laddr *laddr)
2787 {
2788
2789         /* remove from the list */
2790         LIST_REMOVE(laddr, sctp_nxt_addr);
2791         sctp_free_ifa(laddr->ifa);
2792         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2793         SCTP_DECR_LADDR_COUNT();
2794 }
2795
2796
2797
2798 /* sctp_ifap is used to bypass normal local address validation checks */
2799 int
2800 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2801     struct sctp_ifa *sctp_ifap, struct thread *p)
2802 {
2803         /* bind a ep to a socket address */
2804         struct sctppcbhead *head;
2805         struct sctp_inpcb *inp, *inp_tmp;
2806         struct inpcb *ip_inp;
2807         int port_reuse_active = 0;
2808         int bindall;
2809         uint16_t lport;
2810         int error;
2811         uint32_t vrf_id;
2812
2813         lport = 0;
2814         bindall = 1;
2815         inp = (struct sctp_inpcb *)so->so_pcb;
2816         ip_inp = (struct inpcb *)so->so_pcb;
2817 #ifdef SCTP_DEBUG
2818         if (addr) {
2819                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2820                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2821                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2822                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2823         }
2824 #endif
2825         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2826                 /* already did a bind, subsequent binds NOT allowed ! */
2827                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2828                 return (EINVAL);
2829         }
2830 #ifdef INVARIANTS
2831         if (p == NULL)
2832                 panic("null proc/thread");
2833 #endif
2834         if (addr != NULL) {
2835                 switch (addr->sa_family) {
2836 #ifdef INET
2837                 case AF_INET:
2838                         {
2839                                 struct sockaddr_in *sin;
2840
2841                                 /* IPV6_V6ONLY socket? */
2842                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2843                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2844                                         return (EINVAL);
2845                                 }
2846                                 if (addr->sa_len != sizeof(*sin)) {
2847                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2848                                         return (EINVAL);
2849                                 }
2850                                 sin = (struct sockaddr_in *)addr;
2851                                 lport = sin->sin_port;
2852                                 /*
2853                                  * For LOOPBACK the prison_local_ip4() call
2854                                  * will transmute the ip address to the
2855                                  * proper value.
2856                                  */
2857                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2858                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2859                                         return (error);
2860                                 }
2861                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2862                                         bindall = 0;
2863                                 }
2864                                 break;
2865                         }
2866 #endif
2867 #ifdef INET6
2868                 case AF_INET6:
2869                         {
2870                                 /*
2871                                  * Only for pure IPv6 Address. (No IPv4
2872                                  * Mapped!)
2873                                  */
2874                                 struct sockaddr_in6 *sin6;
2875
2876                                 sin6 = (struct sockaddr_in6 *)addr;
2877
2878                                 if (addr->sa_len != sizeof(*sin6)) {
2879                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2880                                         return (EINVAL);
2881                                 }
2882                                 lport = sin6->sin6_port;
2883                                 /*
2884                                  * For LOOPBACK the prison_local_ip6() call
2885                                  * will transmute the ipv6 address to the
2886                                  * proper value.
2887                                  */
2888                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2889                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2890                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2891                                         return (error);
2892                                 }
2893                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2894                                         bindall = 0;
2895                                         /* KAME hack: embed scopeid */
2896                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2897                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2898                                                 return (EINVAL);
2899                                         }
2900                                 }
2901                                 /* this must be cleared for ifa_ifwithaddr() */
2902                                 sin6->sin6_scope_id = 0;
2903                                 break;
2904                         }
2905 #endif
2906                 default:
2907                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2908                         return (EAFNOSUPPORT);
2909                 }
2910         }
2911         SCTP_INP_INFO_WLOCK();
2912         SCTP_INP_WLOCK(inp);
2913         /* Setup a vrf_id to be the default for the non-bind-all case. */
2914         vrf_id = inp->def_vrf_id;
2915
2916         /* increase our count due to the unlock we do */
2917         SCTP_INP_INCR_REF(inp);
2918         if (lport) {
2919                 /*
2920                  * Did the caller specify a port? if so we must see if an ep
2921                  * already has this one bound.
2922                  */
2923                 /* got to be root to get at low ports */
2924                 if (ntohs(lport) < IPPORT_RESERVED) {
2925                         if ((p != NULL) && ((error =
2926                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2927                             ) != 0)) {
2928                                 SCTP_INP_DECR_REF(inp);
2929                                 SCTP_INP_WUNLOCK(inp);
2930                                 SCTP_INP_INFO_WUNLOCK();
2931                                 return (error);
2932                         }
2933                 }
2934                 SCTP_INP_WUNLOCK(inp);
2935                 if (bindall) {
2936                         vrf_id = inp->def_vrf_id;
2937                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2938                         if (inp_tmp != NULL) {
2939                                 /*
2940                                  * lock guy returned and lower count note
2941                                  * that we are not bound so inp_tmp should
2942                                  * NEVER be inp. And it is this inp
2943                                  * (inp_tmp) that gets the reference bump,
2944                                  * so we must lower it.
2945                                  */
2946                                 SCTP_INP_DECR_REF(inp_tmp);
2947                                 /* unlock info */
2948                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2949                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2950                                         /*
2951                                          * Ok, must be one-2-one and
2952                                          * allowing port re-use
2953                                          */
2954                                         port_reuse_active = 1;
2955                                         goto continue_anyway;
2956                                 }
2957                                 SCTP_INP_DECR_REF(inp);
2958                                 SCTP_INP_INFO_WUNLOCK();
2959                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2960                                 return (EADDRINUSE);
2961                         }
2962                 } else {
2963                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2964                         if (inp_tmp != NULL) {
2965                                 /*
2966                                  * lock guy returned and lower count note
2967                                  * that we are not bound so inp_tmp should
2968                                  * NEVER be inp. And it is this inp
2969                                  * (inp_tmp) that gets the reference bump,
2970                                  * so we must lower it.
2971                                  */
2972                                 SCTP_INP_DECR_REF(inp_tmp);
2973                                 /* unlock info */
2974                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2975                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2976                                         /*
2977                                          * Ok, must be one-2-one and
2978                                          * allowing port re-use
2979                                          */
2980                                         port_reuse_active = 1;
2981                                         goto continue_anyway;
2982                                 }
2983                                 SCTP_INP_DECR_REF(inp);
2984                                 SCTP_INP_INFO_WUNLOCK();
2985                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2986                                 return (EADDRINUSE);
2987                         }
2988                 }
2989 continue_anyway:
2990                 SCTP_INP_WLOCK(inp);
2991                 if (bindall) {
2992                         /* verify that no lport is not used by a singleton */
2993                         if ((port_reuse_active == 0) &&
2994                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
2995                                 /* Sorry someone already has this one bound */
2996                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2997                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2998                                         port_reuse_active = 1;
2999                                 } else {
3000                                         SCTP_INP_DECR_REF(inp);
3001                                         SCTP_INP_WUNLOCK(inp);
3002                                         SCTP_INP_INFO_WUNLOCK();
3003                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3004                                         return (EADDRINUSE);
3005                                 }
3006                         }
3007                 }
3008         } else {
3009                 uint16_t first, last, candidate;
3010                 uint16_t count;
3011                 int done;
3012
3013                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3014                         first = MODULE_GLOBAL(ipport_hifirstauto);
3015                         last = MODULE_GLOBAL(ipport_hilastauto);
3016                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3017                         if (p && (error =
3018                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3019                             )) {
3020                                 SCTP_INP_DECR_REF(inp);
3021                                 SCTP_INP_WUNLOCK(inp);
3022                                 SCTP_INP_INFO_WUNLOCK();
3023                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3024                                 return (error);
3025                         }
3026                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3027                         last = MODULE_GLOBAL(ipport_lowlastauto);
3028                 } else {
3029                         first = MODULE_GLOBAL(ipport_firstauto);
3030                         last = MODULE_GLOBAL(ipport_lastauto);
3031                 }
3032                 if (first > last) {
3033                         uint16_t temp;
3034
3035                         temp = first;
3036                         first = last;
3037                         last = temp;
3038                 }
3039                 count = last - first + 1;       /* number of candidates */
3040                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3041
3042                 done = 0;
3043                 while (!done) {
3044                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3045                                 done = 1;
3046                         }
3047                         if (!done) {
3048                                 if (--count == 0) {
3049                                         SCTP_INP_DECR_REF(inp);
3050                                         SCTP_INP_WUNLOCK(inp);
3051                                         SCTP_INP_INFO_WUNLOCK();
3052                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3053                                         return (EADDRINUSE);
3054                                 }
3055                                 if (candidate == last)
3056                                         candidate = first;
3057                                 else
3058                                         candidate = candidate + 1;
3059                         }
3060                 }
3061                 lport = htons(candidate);
3062         }
3063         SCTP_INP_DECR_REF(inp);
3064         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3065             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3066                 /*
3067                  * this really should not happen. The guy did a non-blocking
3068                  * bind and then did a close at the same time.
3069                  */
3070                 SCTP_INP_WUNLOCK(inp);
3071                 SCTP_INP_INFO_WUNLOCK();
3072                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3073                 return (EINVAL);
3074         }
3075         /* ok we look clear to give out this port, so lets setup the binding */
3076         if (bindall) {
3077                 /* binding to all addresses, so just set in the proper flags */
3078                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3079                 /* set the automatic addr changes from kernel flag */
3080                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3081                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3082                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3083                 } else {
3084                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3085                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3086                 }
3087                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3088                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3089                 } else {
3090                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3091                 }
3092                 /*
3093                  * set the automatic mobility_base from kernel flag (by
3094                  * micchie)
3095                  */
3096                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3097                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3098                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3099                 } else {
3100                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3101                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3102                 }
3103                 /*
3104                  * set the automatic mobility_fasthandoff from kernel flag
3105                  * (by micchie)
3106                  */
3107                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3108                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3109                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3110                 } else {
3111                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3112                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3113                 }
3114         } else {
3115                 /*
3116                  * bind specific, make sure flags is off and add a new
3117                  * address structure to the sctp_addr_list inside the ep
3118                  * structure.
3119                  *
3120                  * We will need to allocate one and insert it at the head.
3121                  * The socketopt call can just insert new addresses in there
3122                  * as well. It will also have to do the embed scope kame
3123                  * hack too (before adding).
3124                  */
3125                 struct sctp_ifa *ifa;
3126                 union sctp_sockstore store;
3127
3128                 memset(&store, 0, sizeof(store));
3129                 switch (addr->sa_family) {
3130 #ifdef INET
3131                 case AF_INET:
3132                         memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3133                         store.sin.sin_port = 0;
3134                         break;
3135 #endif
3136 #ifdef INET6
3137                 case AF_INET6:
3138                         memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3139                         store.sin6.sin6_port = 0;
3140                         break;
3141 #endif
3142                 default:
3143                         break;
3144                 }
3145                 /*
3146                  * first find the interface with the bound address need to
3147                  * zero out the port to find the address! yuck! can't do
3148                  * this earlier since need port for sctp_pcb_findep()
3149                  */
3150                 if (sctp_ifap != NULL) {
3151                         ifa = sctp_ifap;
3152                 } else {
3153                         /*
3154                          * Note for BSD we hit here always other O/S's will
3155                          * pass things in via the sctp_ifap argument
3156                          * (Panda).
3157                          */
3158                         ifa = sctp_find_ifa_by_addr(&store.sa,
3159                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3160                 }
3161                 if (ifa == NULL) {
3162                         /* Can't find an interface with that address */
3163                         SCTP_INP_WUNLOCK(inp);
3164                         SCTP_INP_INFO_WUNLOCK();
3165                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3166                         return (EADDRNOTAVAIL);
3167                 }
3168 #ifdef INET6
3169                 if (addr->sa_family == AF_INET6) {
3170                         /* GAK, more FIXME IFA lock? */
3171                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3172                                 /* Can't bind a non-existent addr. */
3173                                 SCTP_INP_WUNLOCK(inp);
3174                                 SCTP_INP_INFO_WUNLOCK();
3175                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3176                                 return (EINVAL);
3177                         }
3178                 }
3179 #endif
3180                 /* we're not bound all */
3181                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3182                 /* allow bindx() to send ASCONF's for binding changes */
3183                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3184                 /* clear automatic addr changes from kernel flag */
3185                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3186
3187                 /* add this address to the endpoint list */
3188                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3189                 if (error != 0) {
3190                         SCTP_INP_WUNLOCK(inp);
3191                         SCTP_INP_INFO_WUNLOCK();
3192                         return (error);
3193                 }
3194                 inp->laddr_count++;
3195         }
3196         /* find the bucket */
3197         if (port_reuse_active) {
3198                 /* Put it into tcp 1-2-1 hash */
3199                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3200                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3201         } else {
3202                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3203         }
3204         /* put it in the bucket */
3205         LIST_INSERT_HEAD(head, inp, sctp_hash);
3206         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3207             (void *)head, ntohs(lport), port_reuse_active);
3208         /* set in the port */
3209         inp->sctp_lport = lport;
3210
3211         /* turn off just the unbound flag */
3212         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3213         SCTP_INP_WUNLOCK(inp);
3214         SCTP_INP_INFO_WUNLOCK();
3215         return (0);
3216 }
3217
3218
3219 static void
3220 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3221 {
3222         struct sctp_iterator *it, *nit;
3223
3224         /*
3225          * We enter with the only the ITERATOR_LOCK in place and a write
3226          * lock on the inp_info stuff.
3227          */
3228         it = sctp_it_ctl.cur_it;
3229         if (it && (it->vn != curvnet)) {
3230                 /* Its not looking at our VNET */
3231                 return;
3232         }
3233         if (it && (it->inp == inp)) {
3234                 /*
3235                  * This is tricky and we hold the iterator lock, but when it
3236                  * returns and gets the lock (when we release it) the
3237                  * iterator will try to operate on inp. We need to stop that
3238                  * from happening. But of course the iterator has a
3239                  * reference on the stcb and inp. We can mark it and it will
3240                  * stop.
3241                  *
3242                  * If its a single iterator situation, we set the end
3243                  * iterator flag. Otherwise we set the iterator to go to the
3244                  * next inp.
3245                  *
3246                  */
3247                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3248                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3249                 } else {
3250                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3251                 }
3252         }
3253         /*
3254          * Now go through and remove any single reference to our inp that
3255          * may be still pending on the list
3256          */
3257         SCTP_IPI_ITERATOR_WQ_LOCK();
3258         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3259                 if (it->vn != curvnet) {
3260                         continue;
3261                 }
3262                 if (it->inp == inp) {
3263                         /* This one points to me is it inp specific? */
3264                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3265                                 /* Remove and free this one */
3266                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3267                                     it, sctp_nxt_itr);
3268                                 if (it->function_atend != NULL) {
3269                                         (*it->function_atend) (it->pointer, it->val);
3270                                 }
3271                                 SCTP_FREE(it, SCTP_M_ITER);
3272                         } else {
3273                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3274                                 if (it->inp) {
3275                                         SCTP_INP_INCR_REF(it->inp);
3276                                 }
3277                         }
3278                         /*
3279                          * When its put in the refcnt is incremented so decr
3280                          * it
3281                          */
3282                         SCTP_INP_DECR_REF(inp);
3283                 }
3284         }
3285         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3286 }
3287
3288 /* release sctp_inpcb unbind the port */
3289 void
3290 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3291 {
3292         /*
3293          * Here we free a endpoint. We must find it (if it is in the Hash
3294          * table) and remove it from there. Then we must also find it in the
3295          * overall list and remove it from there. After all removals are
3296          * complete then any timer has to be stopped. Then start the actual
3297          * freeing. a) Any local lists. b) Any associations. c) The hash of
3298          * all associations. d) finally the ep itself.
3299          */
3300         struct sctp_tcb *asoc, *nasoc;
3301         struct sctp_laddr *laddr, *nladdr;
3302         struct inpcb *ip_pcb;
3303         struct socket *so;
3304         int being_refed = 0;
3305         struct sctp_queued_to_read *sq, *nsq;
3306         int cnt;
3307         sctp_sharedkey_t *shared_key, *nshared_key;
3308
3309
3310 #ifdef SCTP_LOG_CLOSING
3311         sctp_log_closing(inp, NULL, 0);
3312 #endif
3313         SCTP_ITERATOR_LOCK();
3314         /* mark any iterators on the list or being processed */
3315         sctp_iterator_inp_being_freed(inp);
3316         SCTP_ITERATOR_UNLOCK();
3317         so = inp->sctp_socket;
3318         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3319                 /* been here before.. eeks.. get out of here */
3320                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3321 #ifdef SCTP_LOG_CLOSING
3322                 sctp_log_closing(inp, NULL, 1);
3323 #endif
3324                 return;
3325         }
3326         SCTP_ASOC_CREATE_LOCK(inp);
3327         SCTP_INP_INFO_WLOCK();
3328
3329         SCTP_INP_WLOCK(inp);
3330         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3331                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3332                 /* socket is gone, so no more wakeups allowed */
3333                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3334                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3335                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3336
3337         }
3338         /* First time through we have the socket lock, after that no more. */
3339         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3340             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3341
3342         if (inp->control) {
3343                 sctp_m_freem(inp->control);
3344                 inp->control = NULL;
3345         }
3346         if (inp->pkt) {
3347                 sctp_m_freem(inp->pkt);
3348                 inp->pkt = NULL;
3349         }
3350         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3351                                          * here but I will be nice :> (i.e.
3352                                          * ip_pcb = ep;) */
3353         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3354                 int cnt_in_sd;
3355
3356                 cnt_in_sd = 0;
3357                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3358                         SCTP_TCB_LOCK(asoc);
3359                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3360                                 /* Skip guys being freed */
3361                                 cnt_in_sd++;
3362                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3363                                         /*
3364                                          * Special case - we did not start a
3365                                          * kill timer on the asoc due to it
3366                                          * was not closed. So go ahead and
3367                                          * start it now.
3368                                          */
3369                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3370                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3371                                 }
3372                                 SCTP_TCB_UNLOCK(asoc);
3373                                 continue;
3374                         }
3375                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3376                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3377                             (asoc->asoc.total_output_queue_size == 0)) {
3378                                 /*
3379                                  * If we have data in queue, we don't want
3380                                  * to just free since the app may have done,
3381                                  * send()/close or connect/send/close. And
3382                                  * it wants the data to get across first.
3383                                  */
3384                                 /* Just abandon things in the front states */
3385                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3386                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3387                                         cnt_in_sd++;
3388                                 }
3389                                 continue;
3390                         }
3391                         /* Disconnect the socket please */
3392                         asoc->sctp_socket = NULL;
3393                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3394                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3395                             (asoc->asoc.control_pdapi) ||
3396                             (asoc->asoc.size_on_all_streams > 0) ||
3397                             (so && (so->so_rcv.sb_cc > 0))) {
3398                                 /* Left with Data unread */
3399                                 struct mbuf *op_err;
3400
3401                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3402                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3403                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3404                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3405                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3406                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3407                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3408                                 }
3409                                 if (sctp_free_assoc(inp, asoc,
3410                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3411                                         cnt_in_sd++;
3412                                 }
3413                                 continue;
3414                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3415                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3416                             (asoc->asoc.stream_queue_cnt == 0)) {
3417                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3418                                         goto abort_anyway;
3419                                 }
3420                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3421                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3422                                         struct sctp_nets *netp;
3423
3424                                         /*
3425                                          * there is nothing queued to send,
3426                                          * so I send shutdown
3427                                          */
3428                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3429                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3430                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3431                                         }
3432                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3433                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3434                                         sctp_stop_timers_for_shutdown(asoc);
3435                                         if (asoc->asoc.alternate) {
3436                                                 netp = asoc->asoc.alternate;
3437                                         } else {
3438                                                 netp = asoc->asoc.primary_destination;
3439                                         }
3440                                         sctp_send_shutdown(asoc, netp);
3441                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3442                                             netp);
3443                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3444                                             asoc->asoc.primary_destination);
3445                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3446                                 }
3447                         } else {
3448                                 /* mark into shutdown pending */
3449                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3450                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3451                                     asoc->asoc.primary_destination);
3452                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3453                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3454                                 }
3455                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3456                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3457                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3458                                         struct mbuf *op_err;
3459
3460                         abort_anyway:
3461                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3462                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3463                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3464                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3465                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3466                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3467                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3468                                         }
3469                                         if (sctp_free_assoc(inp, asoc,
3470                                             SCTP_PCBFREE_NOFORCE,
3471                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3472                                                 cnt_in_sd++;
3473                                         }
3474                                         continue;
3475                                 } else {
3476                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3477                                 }
3478                         }
3479                         cnt_in_sd++;
3480                         SCTP_TCB_UNLOCK(asoc);
3481                 }
3482                 /* now is there some left in our SHUTDOWN state? */
3483                 if (cnt_in_sd) {
3484 #ifdef SCTP_LOG_CLOSING
3485                         sctp_log_closing(inp, NULL, 2);
3486 #endif
3487                         inp->sctp_socket = NULL;
3488                         SCTP_INP_WUNLOCK(inp);
3489                         SCTP_ASOC_CREATE_UNLOCK(inp);
3490                         SCTP_INP_INFO_WUNLOCK();
3491                         return;
3492                 }
3493         }
3494         inp->sctp_socket = NULL;
3495         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3496             SCTP_PCB_FLAGS_UNBOUND) {
3497                 /*
3498                  * ok, this guy has been bound. It's port is somewhere in
3499                  * the SCTP_BASE_INFO(hash table). Remove it!
3500                  */
3501                 LIST_REMOVE(inp, sctp_hash);
3502                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3503         }
3504         /*
3505          * If there is a timer running to kill us, forget it, since it may
3506          * have a contest on the INP lock.. which would cause us to die ...
3507          */
3508         cnt = 0;
3509         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3510                 SCTP_TCB_LOCK(asoc);
3511                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3512                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3513                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3514                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3515                         }
3516                         cnt++;
3517                         SCTP_TCB_UNLOCK(asoc);
3518                         continue;
3519                 }
3520                 /* Free associations that are NOT killing us */
3521                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3522                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3523                         struct mbuf *op_err;
3524
3525                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3526                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3527                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3528                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3529                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3530                         cnt++;
3531                         SCTP_TCB_UNLOCK(asoc);
3532                         continue;
3533                 }
3534                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3535                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3536                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3537                 }
3538                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3539                     SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3540                         cnt++;
3541                 }
3542         }
3543         if (cnt) {
3544                 /* Ok we have someone out there that will kill us */
3545                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3546 #ifdef SCTP_LOG_CLOSING
3547                 sctp_log_closing(inp, NULL, 3);
3548 #endif
3549                 SCTP_INP_WUNLOCK(inp);
3550                 SCTP_ASOC_CREATE_UNLOCK(inp);
3551                 SCTP_INP_INFO_WUNLOCK();
3552                 return;
3553         }
3554         if (SCTP_INP_LOCK_CONTENDED(inp))
3555                 being_refed++;
3556         if (SCTP_INP_READ_CONTENDED(inp))
3557                 being_refed++;
3558         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3559                 being_refed++;
3560
3561         if ((inp->refcount) ||
3562             (being_refed) ||
3563             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3564                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3565 #ifdef SCTP_LOG_CLOSING
3566                 sctp_log_closing(inp, NULL, 4);
3567 #endif
3568                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3569                 SCTP_INP_WUNLOCK(inp);
3570                 SCTP_ASOC_CREATE_UNLOCK(inp);
3571                 SCTP_INP_INFO_WUNLOCK();
3572                 return;
3573         }
3574         inp->sctp_ep.signature_change.type = 0;
3575         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3576         /*
3577          * Remove it from the list .. last thing we need a lock for.
3578          */
3579         LIST_REMOVE(inp, sctp_list);
3580         SCTP_INP_WUNLOCK(inp);
3581         SCTP_ASOC_CREATE_UNLOCK(inp);
3582         SCTP_INP_INFO_WUNLOCK();
3583         /*
3584          * Now we release all locks. Since this INP cannot be found anymore
3585          * except possibly by the kill timer that might be running. We call
3586          * the drain function here. It should hit the case were it sees the
3587          * ACTIVE flag cleared and exit out freeing us to proceed and
3588          * destroy everything.
3589          */
3590         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3591                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3592         } else {
3593                 /* Probably un-needed */
3594                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3595         }
3596
3597 #ifdef SCTP_LOG_CLOSING
3598         sctp_log_closing(inp, NULL, 5);
3599 #endif
3600
3601
3602         if ((inp->sctp_asocidhash) != NULL) {
3603                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3604                 inp->sctp_asocidhash = NULL;
3605         }
3606         /* sa_ignore FREED_MEMORY */
3607         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3608                 /* Its only abandoned if it had data left */
3609                 if (sq->length)
3610                         SCTP_STAT_INCR(sctps_left_abandon);
3611
3612                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3613                 sctp_free_remote_addr(sq->whoFrom);
3614                 if (so)
3615                         so->so_rcv.sb_cc -= sq->length;
3616                 if (sq->data) {
3617                         sctp_m_freem(sq->data);
3618                         sq->data = NULL;
3619                 }
3620                 /*
3621                  * no need to free the net count, since at this point all
3622                  * assoc's are gone.
3623                  */
3624                 sctp_free_a_readq(NULL, sq);
3625         }
3626         /* Now the sctp_pcb things */
3627         /*
3628          * free each asoc if it is not already closed/free. we can't use the
3629          * macro here since le_next will get freed as part of the
3630          * sctp_free_assoc() call.
3631          */
3632         if (ip_pcb->inp_options) {
3633                 (void)sctp_m_free(ip_pcb->inp_options);
3634                 ip_pcb->inp_options = 0;
3635         }
3636 #ifdef INET6
3637         if (ip_pcb->inp_vflag & INP_IPV6) {
3638                 struct in6pcb *in6p;
3639
3640                 in6p = (struct in6pcb *)inp;
3641                 ip6_freepcbopts(in6p->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_rt);
3980                         hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum);
3981                         net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu);
3982                         if (rmtu == 0) {
3983                                 /*
3984                                  * Start things off to match mtu of
3985                                  * interface please.
3986                                  */
3987                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3988                                     net->ro.ro_rt, net->mtu);
3989                         }
3990                 }
3991         }
3992         if (net->mtu == 0) {
3993                 if (stcb->asoc.default_mtu > 0) {
3994                         net->mtu = stcb->asoc.default_mtu;
3995                         switch (net->ro._l_addr.sa.sa_family) {
3996 #ifdef INET
3997                         case AF_INET:
3998                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
3999                                 break;
4000 #endif
4001 #ifdef INET6
4002                         case AF_INET6:
4003                                 net->mtu += SCTP_MIN_OVERHEAD;
4004                                 break;
4005 #endif
4006                         default:
4007                                 break;
4008                         }
4009 #if defined(INET) || defined(INET6)
4010                         if (net->port) {
4011                                 net->mtu += (uint32_t)sizeof(struct udphdr);
4012                         }
4013 #endif
4014                 } else {
4015                         switch (newaddr->sa_family) {
4016 #ifdef INET
4017                         case AF_INET:
4018                                 net->mtu = SCTP_DEFAULT_MTU;
4019                                 break;
4020 #endif
4021 #ifdef INET6
4022                         case AF_INET6:
4023                                 net->mtu = 1280;
4024                                 break;
4025 #endif
4026                         default:
4027                                 break;
4028                         }
4029                 }
4030         }
4031 #if defined(INET) || defined(INET6)
4032         if (net->port) {
4033                 net->mtu -= (uint32_t)sizeof(struct udphdr);
4034         }
4035 #endif
4036         if (from == SCTP_ALLOC_ASOC) {
4037                 stcb->asoc.smallest_mtu = net->mtu;
4038         }
4039         if (stcb->asoc.smallest_mtu > net->mtu) {
4040                 sctp_pathmtu_adjustment(stcb, net->mtu);
4041         }
4042 #ifdef INET6
4043         if (newaddr->sa_family == AF_INET6) {
4044                 struct sockaddr_in6 *sin6;
4045
4046                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4047                 (void)sa6_recoverscope(sin6);
4048         }
4049 #endif
4050
4051         /* JRS - Use the congestion control given in the CC module */
4052         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4053                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4054
4055         /*
4056          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4057          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4058          */
4059         net->find_pseudo_cumack = 1;
4060         net->find_rtx_pseudo_cumack = 1;
4061         /* Choose an initial flowid. */
4062         net->flowid = stcb->asoc.my_vtag ^
4063             ntohs(stcb->rport) ^
4064             ntohs(stcb->sctp_ep->sctp_lport);
4065         net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4066         if (netp) {
4067                 *netp = net;
4068         }
4069         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4070         if (net->ro.ro_rt == NULL) {
4071                 /* Since we have no route put it at the back */
4072                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4073         } else if (netfirst == NULL) {
4074                 /* We are the first one in the pool. */
4075                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4076         } else if (netfirst->ro.ro_rt == NULL) {
4077                 /*
4078                  * First one has NO route. Place this one ahead of the first
4079                  * one.
4080                  */
4081                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4082         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4083                 /*
4084                  * This one has a different interface than the one at the
4085                  * top of the list. Place it ahead.
4086                  */
4087                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4088         } else {
4089                 /*
4090                  * Ok we have the same interface as the first one. Move
4091                  * forward until we find either a) one with a NULL route...
4092                  * insert ahead of that b) one with a different ifp.. insert
4093                  * after that. c) end of the list.. insert at the tail.
4094                  */
4095                 struct sctp_nets *netlook;
4096
4097                 do {
4098                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4099                         if (netlook == NULL) {
4100                                 /* End of the list */
4101                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4102                                 break;
4103                         } else if (netlook->ro.ro_rt == NULL) {
4104                                 /* next one has NO route */
4105                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4106                                 break;
4107                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4108                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4109                                     net, sctp_next);
4110                                 break;
4111                         }
4112                         /* Shift forward */
4113                         netfirst = netlook;
4114                 } while (netlook != NULL);
4115         }
4116
4117         /* got to have a primary set */
4118         if (stcb->asoc.primary_destination == 0) {
4119                 stcb->asoc.primary_destination = net;
4120         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4121                     (net->ro.ro_rt) &&
4122             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4123                 /* No route to current primary adopt new primary */
4124                 stcb->asoc.primary_destination = net;
4125         }
4126         /* Validate primary is first */
4127         net = TAILQ_FIRST(&stcb->asoc.nets);
4128         if ((net != stcb->asoc.primary_destination) &&
4129             (stcb->asoc.primary_destination)) {
4130                 /*
4131                  * first one on the list is NOT the primary sctp_cmpaddr()
4132                  * is much more efficient if the primary is the first on the
4133                  * list, make it so.
4134                  */
4135                 TAILQ_REMOVE(&stcb->asoc.nets,
4136                     stcb->asoc.primary_destination, sctp_next);
4137                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4138                     stcb->asoc.primary_destination, sctp_next);
4139         }
4140         return (0);
4141 }
4142
4143
4144 static uint32_t
4145 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4146 {
4147         uint32_t id;
4148         struct sctpasochead *head;
4149         struct sctp_tcb *lstcb;
4150
4151         SCTP_INP_WLOCK(inp);
4152 try_again:
4153         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4154                 /* TSNH */
4155                 SCTP_INP_WUNLOCK(inp);
4156                 return (0);
4157         }
4158         /*
4159          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4160          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4161          */
4162         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4163                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4164         }
4165         id = inp->sctp_associd_counter;
4166         inp->sctp_associd_counter++;
4167         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4168         if (lstcb) {
4169                 goto try_again;
4170         }
4171         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4172         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4173         stcb->asoc.in_asocid_hash = 1;
4174         SCTP_INP_WUNLOCK(inp);
4175         return id;
4176 }
4177
4178 /*
4179  * allocate an association and add it to the endpoint. The caller must be
4180  * careful to add all additional addresses once they are know right away or
4181  * else the assoc will be may experience a blackout scenario.
4182  */
4183 struct sctp_tcb *
4184 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4185     int *error, uint32_t override_tag, uint32_t vrf_id,
4186     uint16_t o_streams, uint16_t port,
4187     struct thread *p
4188 )
4189 {
4190         /* note the p argument is only valid in unbound sockets */
4191
4192         struct sctp_tcb *stcb;
4193         struct sctp_association *asoc;
4194         struct sctpasochead *head;
4195         uint16_t rport;
4196         int err;
4197
4198         /*
4199          * Assumption made here: Caller has done a
4200          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4201          * address does not exist already.
4202          */
4203         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4204                 /* Hit max assoc, sorry no more */
4205                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4206                 *error = ENOBUFS;
4207                 return (NULL);
4208         }
4209         if (firstaddr == NULL) {
4210                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4211                 *error = EINVAL;
4212                 return (NULL);
4213         }
4214         SCTP_INP_RLOCK(inp);
4215         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4216             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4217             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4218                 /*
4219                  * If its in the TCP pool, its NOT allowed to create an
4220                  * association. The parent listener needs to call
4221                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4222                  * off, or connected one does this.. its an error.
4223                  */
4224                 SCTP_INP_RUNLOCK(inp);
4225                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4226                 *error = EINVAL;
4227                 return (NULL);
4228         }
4229         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4230             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4231                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4232                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4233                         SCTP_INP_RUNLOCK(inp);
4234                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4235                         *error = EINVAL;
4236                         return (NULL);
4237                 }
4238         }
4239         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4240 #ifdef SCTP_DEBUG
4241         if (firstaddr) {
4242                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4243                 switch (firstaddr->sa_family) {
4244 #ifdef INET
4245                 case AF_INET:
4246                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4247                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4248                         break;
4249 #endif
4250 #ifdef INET6
4251                 case AF_INET6:
4252                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4253                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4254                         break;
4255 #endif
4256                 default:
4257                         break;
4258                 }
4259         } else {
4260                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4261         }
4262 #endif                          /* SCTP_DEBUG */
4263         switch (firstaddr->sa_family) {
4264 #ifdef INET
4265         case AF_INET:
4266                 {
4267                         struct sockaddr_in *sin;
4268
4269                         sin = (struct sockaddr_in *)firstaddr;
4270                         if ((ntohs(sin->sin_port) == 0) ||
4271                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4272                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4273                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4274                                 /* Invalid address */
4275                                 SCTP_INP_RUNLOCK(inp);
4276                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4277                                 *error = EINVAL;
4278                                 return (NULL);
4279                         }
4280                         rport = sin->sin_port;
4281                         break;
4282                 }
4283 #endif
4284 #ifdef INET6
4285         case AF_INET6:
4286                 {
4287                         struct sockaddr_in6 *sin6;
4288
4289                         sin6 = (struct sockaddr_in6 *)firstaddr;
4290                         if ((ntohs(sin6->sin6_port) == 0) ||
4291                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4292                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4293                                 /* Invalid address */
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                         rport = sin6->sin6_port;
4300                         break;
4301                 }
4302 #endif
4303         default:
4304                 /* not supported family type */
4305                 SCTP_INP_RUNLOCK(inp);
4306                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4307                 *error = EINVAL;
4308                 return (NULL);
4309         }
4310         SCTP_INP_RUNLOCK(inp);
4311         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4312                 /*
4313                  * If you have not performed a bind, then we need to do the
4314                  * ephemeral bind for you.
4315                  */
4316                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4317                     (struct sockaddr *)NULL,
4318                     (struct sctp_ifa *)NULL,
4319                     p
4320                     ))) {
4321                         /* bind error, probably perm */
4322                         *error = err;
4323                         return (NULL);
4324                 }
4325         }
4326         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4327         if (stcb == NULL) {
4328                 /* out of memory? */
4329                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4330                 *error = ENOMEM;
4331                 return (NULL);
4332         }
4333         SCTP_INCR_ASOC_COUNT();
4334
4335         memset(stcb, 0, sizeof(*stcb));
4336         asoc = &stcb->asoc;
4337
4338         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4339         SCTP_TCB_LOCK_INIT(stcb);
4340         SCTP_TCB_SEND_LOCK_INIT(stcb);
4341         stcb->rport = rport;
4342         /* setup back pointer's */
4343         stcb->sctp_ep = inp;
4344         stcb->sctp_socket = inp->sctp_socket;
4345         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
4346                 /* failed */
4347                 SCTP_TCB_LOCK_DESTROY(stcb);
4348                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4349                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4350                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4351                 SCTP_DECR_ASOC_COUNT();
4352                 *error = err;
4353                 return (NULL);
4354         }
4355         /* and the port */
4356         SCTP_INP_INFO_WLOCK();
4357         SCTP_INP_WLOCK(inp);
4358         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4359                 /* inpcb freed while alloc going on */
4360                 SCTP_TCB_LOCK_DESTROY(stcb);
4361                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4362                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4363                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4364                 SCTP_INP_WUNLOCK(inp);
4365                 SCTP_INP_INFO_WUNLOCK();
4366                 SCTP_DECR_ASOC_COUNT();
4367                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4368                 *error = EINVAL;
4369                 return (NULL);
4370         }
4371         SCTP_TCB_LOCK(stcb);
4372
4373         /* now that my_vtag is set, add it to the hash */
4374         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4375         /* put it in the bucket in the vtag hash of assoc's for the system */
4376         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4377         SCTP_INP_INFO_WUNLOCK();
4378
4379         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4380                 /* failure.. memory error? */
4381                 if (asoc->strmout) {
4382                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4383                         asoc->strmout = NULL;
4384                 }
4385                 if (asoc->mapping_array) {
4386                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4387                         asoc->mapping_array = NULL;
4388                 }
4389                 if (asoc->nr_mapping_array) {
4390                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4391                         asoc->nr_mapping_array = NULL;
4392                 }
4393                 SCTP_DECR_ASOC_COUNT();
4394                 SCTP_TCB_UNLOCK(stcb);
4395                 SCTP_TCB_LOCK_DESTROY(stcb);
4396                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4397                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4398                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4399                 SCTP_INP_WUNLOCK(inp);
4400                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4401                 *error = ENOBUFS;
4402                 return (NULL);
4403         }
4404         /* Init all the timers */
4405         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4406         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4407         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4408         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4409         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4410         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4411         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4412
4413         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4414         /* now file the port under the hash as well */
4415         if (inp->sctp_tcbhash != NULL) {
4416                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4417                     inp->sctp_hashmark)];
4418                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4419         }
4420         SCTP_INP_WUNLOCK(inp);
4421         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4422         return (stcb);
4423 }
4424
4425
4426 void
4427 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4428 {
4429         struct sctp_association *asoc;
4430
4431         asoc = &stcb->asoc;
4432         asoc->numnets--;
4433         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4434         if (net == asoc->primary_destination) {
4435                 /* Reset primary */
4436                 struct sctp_nets *lnet;
4437
4438                 lnet = TAILQ_FIRST(&asoc->nets);
4439                 /*
4440                  * Mobility adaptation Ideally, if deleted destination is
4441                  * the primary, it becomes a fast retransmission trigger by
4442                  * the subsequent SET PRIMARY. (by micchie)
4443                  */
4444                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4445                     SCTP_MOBILITY_BASE) ||
4446                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4447                     SCTP_MOBILITY_FASTHANDOFF)) {
4448                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4449                         if (asoc->deleted_primary != NULL) {
4450                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4451                                 goto out;
4452                         }
4453                         asoc->deleted_primary = net;
4454                         atomic_add_int(&net->ref_count, 1);
4455                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4456                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4457                         sctp_mobility_feature_on(stcb->sctp_ep,
4458                             SCTP_MOBILITY_PRIM_DELETED);
4459                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4460                             stcb->sctp_ep, stcb, NULL);
4461                 }
4462 out:
4463                 /* Try to find a confirmed primary */
4464                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4465         }
4466         if (net == asoc->last_data_chunk_from) {
4467                 /* Reset primary */
4468                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4469         }
4470         if (net == asoc->last_control_chunk_from) {
4471                 /* Clear net */
4472                 asoc->last_control_chunk_from = NULL;
4473         }
4474         if (net == stcb->asoc.alternate) {
4475                 sctp_free_remote_addr(stcb->asoc.alternate);
4476                 stcb->asoc.alternate = NULL;
4477         }
4478         sctp_free_remote_addr(net);
4479 }
4480
4481 /*
4482  * remove a remote endpoint address from an association, it will fail if the
4483  * address does not exist.
4484  */
4485 int
4486 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4487 {
4488         /*
4489          * Here we need to remove a remote address. This is quite simple, we
4490          * first find it in the list of address for the association
4491          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4492          * on that item. Note we do not allow it to be removed if there are
4493          * no other addresses.
4494          */
4495         struct sctp_association *asoc;
4496         struct sctp_nets *net, *nnet;
4497
4498         asoc = &stcb->asoc;
4499
4500         /* locate the address */
4501         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4502                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4503                         continue;
4504                 }
4505                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4506                     remaddr)) {
4507                         /* we found the guy */
4508                         if (asoc->numnets < 2) {
4509                                 /* Must have at LEAST two remote addresses */
4510                                 return (-1);
4511                         } else {
4512                                 sctp_remove_net(stcb, net);
4513                                 return (0);
4514                         }
4515                 }
4516         }
4517         /* not found. */
4518         return (-2);
4519 }
4520
4521 void
4522 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4523 {
4524         struct sctpvtaghead *chain;
4525         struct sctp_tagblock *twait_block;
4526         int found = 0;
4527         int i;
4528
4529         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4530         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4531                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4532                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4533                             (twait_block->vtag_block[i].lport == lport) &&
4534                             (twait_block->vtag_block[i].rport == rport)) {
4535                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4536                                 twait_block->vtag_block[i].v_tag = 0;
4537                                 twait_block->vtag_block[i].lport = 0;
4538                                 twait_block->vtag_block[i].rport = 0;
4539                                 found = 1;
4540                                 break;
4541                         }
4542                 }
4543                 if (found)
4544                         break;
4545         }
4546 }
4547
4548 int
4549 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4550 {
4551         struct sctpvtaghead *chain;
4552         struct sctp_tagblock *twait_block;
4553         int found = 0;
4554         int i;
4555
4556         SCTP_INP_INFO_WLOCK();
4557         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4558         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4559                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4560                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4561                             (twait_block->vtag_block[i].lport == lport) &&
4562                             (twait_block->vtag_block[i].rport == rport)) {
4563                                 found = 1;
4564                                 break;
4565                         }
4566                 }
4567                 if (found)
4568                         break;
4569         }
4570         SCTP_INP_INFO_WUNLOCK();
4571         return (found);
4572 }
4573
4574
4575 void
4576 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4577 {
4578         struct sctpvtaghead *chain;
4579         struct sctp_tagblock *twait_block;
4580         struct timeval now;
4581         int set, i;
4582
4583         if (time == 0) {
4584                 /* Its disabled */
4585                 return;
4586         }
4587         (void)SCTP_GETTIME_TIMEVAL(&now);
4588         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4589         set = 0;
4590         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4591                 /* Block(s) present, lets find space, and expire on the fly */
4592                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4593                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4594                             !set) {
4595                                 twait_block->vtag_block[i].tv_sec_at_expire =
4596                                     now.tv_sec + time;
4597                                 twait_block->vtag_block[i].v_tag = tag;
4598                                 twait_block->vtag_block[i].lport = lport;
4599                                 twait_block->vtag_block[i].rport = rport;
4600                                 set = 1;
4601                         } else if ((twait_block->vtag_block[i].v_tag) &&
4602                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4603                                 /* Audit expires this guy */
4604                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4605                                 twait_block->vtag_block[i].v_tag = 0;
4606                                 twait_block->vtag_block[i].lport = 0;
4607                                 twait_block->vtag_block[i].rport = 0;
4608                                 if (set == 0) {
4609                                         /* Reuse it for my new tag */
4610                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4611                                         twait_block->vtag_block[i].v_tag = tag;
4612                                         twait_block->vtag_block[i].lport = lport;
4613                                         twait_block->vtag_block[i].rport = rport;
4614                                         set = 1;
4615                                 }
4616                         }
4617                 }
4618                 if (set) {
4619                         /*
4620                          * We only do up to the block where we can place our
4621                          * tag for audits
4622                          */
4623                         break;
4624                 }
4625         }
4626         /* Need to add a new block to chain */
4627         if (!set) {
4628                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4629                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4630                 if (twait_block == NULL) {
4631 #ifdef INVARIANTS
4632                         panic("Can not alloc tagblock");
4633 #endif
4634                         return;
4635                 }
4636                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4637                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4638                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4639                 twait_block->vtag_block[0].v_tag = tag;
4640                 twait_block->vtag_block[0].lport = lport;
4641                 twait_block->vtag_block[0].rport = rport;
4642         }
4643 }
4644
4645 void
4646 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4647 {
4648         struct sctp_tmit_chunk *chk, *nchk;
4649         struct sctp_queued_to_read *control, *ncontrol;
4650
4651         TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) {
4652                 TAILQ_REMOVE(rh, control, next_instrm);
4653                 control->on_strm_q = 0;
4654                 if (control->on_read_q == 0) {
4655                         sctp_free_remote_addr(control->whoFrom);
4656                         if (control->data) {
4657                                 sctp_m_freem(control->data);
4658                                 control->data = NULL;
4659                         }
4660                 }
4661                 /* Reassembly free? */
4662                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
4663                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
4664                         if (chk->data) {
4665                                 sctp_m_freem(chk->data);
4666                                 chk->data = NULL;
4667                         }
4668                         if (chk->holds_key_ref)
4669                                 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4670                         sctp_free_remote_addr(chk->whoTo);
4671                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4672                         SCTP_DECR_CHK_COUNT();
4673                         /* sa_ignore FREED_MEMORY */
4674                 }
4675                 /*
4676                  * We don't free the address here since all the net's were
4677                  * freed above.
4678                  */
4679                 if (control->on_read_q == 0) {
4680                         sctp_free_a_readq(stcb, control);
4681                 }
4682         }
4683 }
4684
4685
4686 /*-
4687  * Free the association after un-hashing the remote port. This
4688  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4689  * expect that the input to this function IS a locked TCB.
4690  * It will return 0, if it did NOT destroy the association (instead
4691  * it unlocks it. It will return NON-zero if it either destroyed the
4692  * association OR the association is already destroyed.
4693  */
4694 int
4695 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4696 {
4697         int i;
4698         struct sctp_association *asoc;
4699         struct sctp_nets *net, *nnet;
4700         struct sctp_laddr *laddr, *naddr;
4701         struct sctp_tmit_chunk *chk, *nchk;
4702         struct sctp_asconf_addr *aparam, *naparam;
4703         struct sctp_asconf_ack *aack, *naack;
4704         struct sctp_stream_reset_list *strrst, *nstrrst;
4705         struct sctp_queued_to_read *sq, *nsq;
4706         struct sctp_stream_queue_pending *sp, *nsp;
4707         sctp_sharedkey_t *shared_key, *nshared_key;
4708         struct socket *so;
4709
4710         /* first, lets purge the entry from the hash table. */
4711
4712 #ifdef SCTP_LOG_CLOSING
4713         sctp_log_closing(inp, stcb, 6);
4714 #endif
4715         if (stcb->asoc.state == 0) {
4716 #ifdef SCTP_LOG_CLOSING
4717                 sctp_log_closing(inp, NULL, 7);
4718 #endif
4719                 /* there is no asoc, really TSNH :-0 */
4720                 return (1);
4721         }
4722         if (stcb->asoc.alternate) {
4723                 sctp_free_remote_addr(stcb->asoc.alternate);
4724                 stcb->asoc.alternate = NULL;
4725         }
4726         /* TEMP CODE */
4727         if (stcb->freed_from_where == 0) {
4728                 /* Only record the first place free happened from */
4729                 stcb->freed_from_where = from_location;
4730         }
4731         /* TEMP CODE */
4732
4733         asoc = &stcb->asoc;
4734         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4735             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4736                 /* nothing around */
4737                 so = NULL;
4738         else
4739                 so = inp->sctp_socket;
4740
4741         /*
4742          * We used timer based freeing if a reader or writer is in the way.
4743          * So we first check if we are actually being called from a timer,
4744          * if so we abort early if a reader or writer is still in the way.
4745          */
4746         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4747             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4748                 /*
4749                  * is it the timer driving us? if so are the reader/writers
4750                  * gone?
4751                  */
4752                 if (stcb->asoc.refcnt) {
4753                         /* nope, reader or writer in the way */
4754                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4755                         /* no asoc destroyed */
4756                         SCTP_TCB_UNLOCK(stcb);
4757 #ifdef SCTP_LOG_CLOSING
4758                         sctp_log_closing(inp, stcb, 8);
4759 #endif
4760                         return (0);
4761                 }
4762         }
4763         /* now clean up any other timers */
4764         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4765         asoc->dack_timer.self = NULL;
4766         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4767         /*-
4768          * For stream reset we don't blast this unless
4769          * it is a str-reset timer, it might be the
4770          * free-asoc timer which we DON'T want to
4771          * disturb.
4772          */
4773         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4774                 asoc->strreset_timer.self = NULL;
4775         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4776         asoc->asconf_timer.self = NULL;
4777         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4778         asoc->autoclose_timer.self = NULL;
4779         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4780         asoc->shut_guard_timer.self = NULL;
4781         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4782         asoc->delayed_event_timer.self = NULL;
4783         /* Mobility adaptation */
4784         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4785         asoc->delete_prim_timer.self = NULL;
4786         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4787                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4788                 net->rxt_timer.self = NULL;
4789                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4790                 net->pmtu_timer.self = NULL;
4791                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4792                 net->hb_timer.self = NULL;
4793         }
4794         /* Now the read queue needs to be cleaned up (only once) */
4795         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4796                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4797                 SCTP_INP_READ_LOCK(inp);
4798                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4799                         if (sq->stcb == stcb) {
4800                                 sq->do_not_ref_stcb = 1;
4801                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4802                                 /*
4803                                  * If there is no end, there never will be
4804                                  * now.
4805                                  */
4806                                 if (sq->end_added == 0) {
4807                                         /* Held for PD-API clear that. */
4808                                         sq->pdapi_aborted = 1;
4809                                         sq->held_length = 0;
4810                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4811                                                 /*
4812                                                  * Need to add a PD-API
4813                                                  * aborted indication.
4814                                                  * Setting the control_pdapi
4815                                                  * assures that it will be
4816                                                  * added right after this
4817                                                  * msg.
4818                                                  */
4819                                                 uint32_t strseq;
4820
4821                                                 stcb->asoc.control_pdapi = sq;
4822                                                 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff);
4823                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4824                                                     stcb,
4825                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4826                                                     (void *)&strseq,
4827                                                     SCTP_SO_LOCKED);
4828                                                 stcb->asoc.control_pdapi = NULL;
4829                                         }
4830                                 }
4831                                 /* Add an end to wake them */
4832                                 sq->end_added = 1;
4833                         }
4834                 }
4835                 SCTP_INP_READ_UNLOCK(inp);
4836                 if (stcb->block_entry) {
4837                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4838                         stcb->block_entry->error = ECONNRESET;
4839                         stcb->block_entry = NULL;
4840                 }
4841         }
4842         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4843                 /*
4844                  * Someone holds a reference OR the socket is unaccepted
4845                  * yet.
4846                  */
4847                 if ((stcb->asoc.refcnt) ||
4848                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4849                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4850                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4851                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4852                 }
4853                 SCTP_TCB_UNLOCK(stcb);
4854                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4855                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4856                         /* nothing around */
4857                         so = NULL;
4858                 if (so) {
4859                         /* Wake any reader/writers */
4860                         sctp_sorwakeup(inp, so);
4861                         sctp_sowwakeup(inp, so);
4862                 }
4863 #ifdef SCTP_LOG_CLOSING
4864                 sctp_log_closing(inp, stcb, 9);
4865 #endif
4866                 /* no asoc destroyed */
4867                 return (0);
4868         }
4869 #ifdef SCTP_LOG_CLOSING
4870         sctp_log_closing(inp, stcb, 10);
4871 #endif
4872         /*
4873          * When I reach here, no others want to kill the assoc yet.. and I
4874          * own the lock. Now its possible an abort comes in when I do the
4875          * lock exchange below to grab all the locks to do the final take
4876          * out. to prevent this we increment the count, which will start a
4877          * timer and blow out above thus assuring us that we hold exclusive
4878          * killing of the asoc. Note that after getting back the TCB lock we
4879          * will go ahead and increment the counter back up and stop any
4880          * timer a passing stranger may have started :-S
4881          */
4882         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4883                 atomic_add_int(&stcb->asoc.refcnt, 1);
4884
4885                 SCTP_TCB_UNLOCK(stcb);
4886                 SCTP_INP_INFO_WLOCK();
4887                 SCTP_INP_WLOCK(inp);
4888                 SCTP_TCB_LOCK(stcb);
4889         }
4890         /* Double check the GONE flag */
4891         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4892             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4893                 /* nothing around */
4894                 so = NULL;
4895
4896         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4897             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4898                 /*
4899                  * For TCP type we need special handling when we are
4900                  * connected. We also include the peel'ed off ones to.
4901                  */
4902                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4903                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4904                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4905                         if (so) {
4906                                 SOCKBUF_LOCK(&so->so_rcv);
4907                                 if (so->so_rcv.sb_cc == 0) {
4908                                         so->so_state &= ~(SS_ISCONNECTING |
4909                                             SS_ISDISCONNECTING |
4910                                             SS_ISCONFIRMING |
4911                                             SS_ISCONNECTED);
4912                                 }
4913                                 socantrcvmore_locked(so);
4914                                 socantsendmore(so);
4915                                 sctp_sowwakeup(inp, so);
4916                                 sctp_sorwakeup(inp, so);
4917                                 SCTP_SOWAKEUP(so);
4918                         }
4919                 }
4920         }
4921         /*
4922          * Make it invalid too, that way if its about to run it will abort
4923          * and return.
4924          */
4925         /* re-increment the lock */
4926         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4927                 atomic_add_int(&stcb->asoc.refcnt, -1);
4928         }
4929         if (stcb->asoc.refcnt) {
4930                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4931                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4932                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4933                         SCTP_INP_INFO_WUNLOCK();
4934                         SCTP_INP_WUNLOCK(inp);
4935                 }
4936                 SCTP_TCB_UNLOCK(stcb);
4937                 return (0);
4938         }
4939         asoc->state = 0;
4940         if (inp->sctp_tcbhash) {
4941                 LIST_REMOVE(stcb, sctp_tcbhash);
4942         }
4943         if (stcb->asoc.in_asocid_hash) {
4944                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4945         }
4946         /* Now lets remove it from the list of ALL associations in the EP */
4947         LIST_REMOVE(stcb, sctp_tcblist);
4948         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4949                 SCTP_INP_INCR_REF(inp);
4950                 SCTP_INP_WUNLOCK(inp);
4951         }
4952         /* pull from vtag hash */
4953         LIST_REMOVE(stcb, sctp_asocs);
4954         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4955             inp->sctp_lport, stcb->rport);
4956
4957         /*
4958          * Now restop the timers to be sure this is paranoia at is finest!
4959          */
4960         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4961         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4962         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4963         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4964         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4965         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4966         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4967         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4968                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4969                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4970                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4971         }
4972
4973         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4974         /*
4975          * The chunk lists and such SHOULD be empty but we check them just
4976          * in case.
4977          */
4978         /* anything on the wheel needs to be removed */
4979         for (i = 0; i < asoc->streamoutcnt; i++) {
4980                 struct sctp_stream_out *outs;
4981
4982                 outs = &asoc->strmout[i];
4983                 /* now clean up any chunks here */
4984                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4985                         atomic_subtract_int(&asoc->stream_queue_cnt, 1);
4986                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4987                         stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 0);
4988                         sctp_free_spbufspace(stcb, asoc, sp);
4989                         if (sp->data) {
4990                                 if (so) {
4991                                         /* Still an open socket - report */
4992                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4993                                             0, (void *)sp, SCTP_SO_LOCKED);
4994                                 }
4995                                 if (sp->data) {
4996                                         sctp_m_freem(sp->data);
4997                                         sp->data = NULL;
4998                                         sp->tail_mbuf = NULL;
4999                                         sp->length = 0;
5000                                 }
5001                         }
5002                         if (sp->net) {
5003                                 sctp_free_remote_addr(sp->net);
5004                                 sp->net = NULL;
5005                         }
5006                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
5007                 }
5008         }
5009         /* sa_ignore FREED_MEMORY */
5010         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
5011                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
5012                 SCTP_FREE(strrst, SCTP_M_STRESET);
5013         }
5014         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
5015                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
5016                 if (sq->data) {
5017                         sctp_m_freem(sq->data);
5018                         sq->data = NULL;
5019                 }
5020                 sctp_free_remote_addr(sq->whoFrom);
5021                 sq->whoFrom = NULL;
5022                 sq->stcb = NULL;
5023                 /* Free the ctl entry */
5024                 sctp_free_a_readq(stcb, sq);
5025                 /* sa_ignore FREED_MEMORY */
5026         }
5027         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
5028                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
5029                 if (chk->data) {
5030                         sctp_m_freem(chk->data);
5031                         chk->data = NULL;
5032                 }
5033                 if (chk->holds_key_ref)
5034                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5035                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5036                 SCTP_DECR_CHK_COUNT();
5037                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
5038                 asoc->free_chunk_cnt--;
5039                 /* sa_ignore FREED_MEMORY */
5040         }
5041         /* pending send queue SHOULD be empty */
5042         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5043                 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5044                         asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5045 #ifdef INVARIANTS
5046                 } else {
5047                         panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5048 #endif
5049                 }
5050                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5051                 if (chk->data) {
5052                         if (so) {
5053                                 /* Still a socket? */
5054                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5055                                     0, chk, SCTP_SO_LOCKED);
5056                         }
5057                         if (chk->data) {
5058                                 sctp_m_freem(chk->data);
5059                                 chk->data = NULL;
5060                         }
5061                 }
5062                 if (chk->holds_key_ref)
5063                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5064                 if (chk->whoTo) {
5065                         sctp_free_remote_addr(chk->whoTo);
5066                         chk->whoTo = NULL;
5067                 }
5068                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5069                 SCTP_DECR_CHK_COUNT();
5070                 /* sa_ignore FREED_MEMORY */
5071         }
5072         /* sent queue SHOULD be empty */
5073         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5074                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5075                         if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5076                                 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5077 #ifdef INVARIANTS
5078                         } else {
5079                                 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5080 #endif
5081                         }
5082                 }
5083                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5084                 if (chk->data) {
5085                         if (so) {
5086                                 /* Still a socket? */
5087                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5088                                     0, chk, SCTP_SO_LOCKED);
5089                         }
5090                         if (chk->data) {
5091                                 sctp_m_freem(chk->data);
5092                                 chk->data = NULL;
5093                         }
5094                 }
5095                 if (chk->holds_key_ref)
5096                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5097                 sctp_free_remote_addr(chk->whoTo);
5098                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5099                 SCTP_DECR_CHK_COUNT();
5100                 /* sa_ignore FREED_MEMORY */
5101         }
5102 #ifdef INVARIANTS
5103         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5104                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5105                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5106                 }
5107         }
5108 #endif
5109         /* control queue MAY not be empty */
5110         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5111                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5112                 if (chk->data) {
5113                         sctp_m_freem(chk->data);
5114                         chk->data = NULL;
5115                 }
5116                 if (chk->holds_key_ref)
5117                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5118                 sctp_free_remote_addr(chk->whoTo);
5119                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5120                 SCTP_DECR_CHK_COUNT();
5121                 /* sa_ignore FREED_MEMORY */
5122         }
5123         /* ASCONF queue MAY not be empty */
5124         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5125                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5126                 if (chk->data) {
5127                         sctp_m_freem(chk->data);
5128                         chk->data = NULL;
5129                 }
5130                 if (chk->holds_key_ref)
5131                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5132                 sctp_free_remote_addr(chk->whoTo);
5133                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5134                 SCTP_DECR_CHK_COUNT();
5135                 /* sa_ignore FREED_MEMORY */
5136         }
5137         if (asoc->mapping_array) {
5138                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5139                 asoc->mapping_array = NULL;
5140         }
5141         if (asoc->nr_mapping_array) {
5142                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5143                 asoc->nr_mapping_array = NULL;
5144         }
5145         /* the stream outs */
5146         if (asoc->strmout) {
5147                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5148                 asoc->strmout = NULL;
5149         }
5150         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5151         if (asoc->strmin) {
5152                 for (i = 0; i < asoc->streamincnt; i++) {
5153                         sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5154                         sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5155                 }
5156                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5157                 asoc->strmin = NULL;
5158         }
5159         asoc->streamincnt = 0;
5160         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5161 #ifdef INVARIANTS
5162                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5163                         panic("no net's left alloc'ed, or list points to itself");
5164                 }
5165 #endif
5166                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5167                 sctp_free_remote_addr(net);
5168         }
5169         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5170                 /* sa_ignore FREED_MEMORY */
5171                 sctp_remove_laddr(laddr);
5172         }
5173
5174         /* pending asconf (address) parameters */
5175         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5176                 /* sa_ignore FREED_MEMORY */
5177                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5178                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5179         }
5180         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5181                 /* sa_ignore FREED_MEMORY */
5182                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5183                 if (aack->data != NULL) {
5184                         sctp_m_freem(aack->data);
5185                 }
5186                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5187         }
5188         /* clean up auth stuff */
5189         if (asoc->local_hmacs)
5190                 sctp_free_hmaclist(asoc->local_hmacs);
5191         if (asoc->peer_hmacs)
5192                 sctp_free_hmaclist(asoc->peer_hmacs);
5193
5194         if (asoc->local_auth_chunks)
5195                 sctp_free_chunklist(asoc->local_auth_chunks);
5196         if (asoc->peer_auth_chunks)
5197                 sctp_free_chunklist(asoc->peer_auth_chunks);
5198
5199         sctp_free_authinfo(&asoc->authinfo);
5200
5201         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5202                 LIST_REMOVE(shared_key, next);
5203                 sctp_free_sharedkey(shared_key);
5204                 /* sa_ignore FREED_MEMORY */
5205         }
5206
5207         /* Insert new items here :> */
5208
5209         /* Get rid of LOCK */
5210         SCTP_TCB_UNLOCK(stcb);
5211         SCTP_TCB_LOCK_DESTROY(stcb);
5212         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5213         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5214                 SCTP_INP_INFO_WUNLOCK();
5215                 SCTP_INP_RLOCK(inp);
5216         }
5217 #ifdef SCTP_TRACK_FREED_ASOCS
5218         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5219                 /* now clean up the tasoc itself */
5220                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5221                 SCTP_DECR_ASOC_COUNT();
5222         } else {
5223                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5224         }
5225 #else
5226         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5227         SCTP_DECR_ASOC_COUNT();
5228 #endif
5229         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5230                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5231                         /*
5232                          * If its NOT the inp_free calling us AND sctp_close
5233                          * as been called, we call back...
5234                          */
5235                         SCTP_INP_RUNLOCK(inp);
5236                         /*
5237                          * This will start the kill timer (if we are the
5238                          * last one) since we hold an increment yet. But
5239                          * this is the only safe way to do this since
5240                          * otherwise if the socket closes at the same time
5241                          * we are here we might collide in the cleanup.
5242                          */
5243                         sctp_inpcb_free(inp,
5244                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5245                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5246                         SCTP_INP_DECR_REF(inp);
5247                         goto out_of;
5248                 } else {
5249                         /* The socket is still open. */
5250                         SCTP_INP_DECR_REF(inp);
5251                 }
5252         }
5253         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5254                 SCTP_INP_RUNLOCK(inp);
5255         }
5256 out_of:
5257         /* destroyed the asoc */
5258 #ifdef SCTP_LOG_CLOSING
5259         sctp_log_closing(inp, NULL, 11);
5260 #endif
5261         return (1);
5262 }
5263
5264
5265
5266 /*
5267  * determine if a destination is "reachable" based upon the addresses bound
5268  * to the current endpoint (e.g. only v4 or v6 currently bound)
5269  */
5270 /*
5271  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5272  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5273  * types bound as its endpoint
5274  */
5275 int
5276 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5277 {
5278         struct sctp_inpcb *inp;
5279         int answer;
5280
5281         /*
5282          * No locks here, the TCB, in all cases is already locked and an
5283          * assoc is up. There is either a INP lock by the caller applied (in
5284          * asconf case when deleting an address) or NOT in the HB case,
5285          * however if HB then the INP increment is up and the INP will not
5286          * be removed (on top of the fact that we have a TCB lock). So we
5287          * only want to read the sctp_flags, which is either bound-all or
5288          * not.. no protection needed since once an assoc is up you can't be
5289          * changing your binding.
5290          */
5291         inp = stcb->sctp_ep;
5292         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5293                 /* if bound all, destination is not restricted */
5294                 /*
5295                  * RRS: Question during lock work: Is this correct? If you
5296                  * are bound-all you still might need to obey the V4--V6
5297                  * flags??? IMO this bound-all stuff needs to be removed!
5298                  */
5299                 return (1);
5300         }
5301         /* NOTE: all "scope" checks are done when local addresses are added */
5302         switch (destaddr->sa_family) {
5303 #ifdef INET6
5304         case AF_INET6:
5305                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5306                 break;
5307 #endif
5308 #ifdef INET
5309         case AF_INET:
5310                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5311                 break;
5312 #endif
5313         default:
5314                 /* invalid family, so it's unreachable */
5315                 answer = 0;
5316                 break;
5317         }
5318         return (answer);
5319 }
5320
5321 /*
5322  * update the inp_vflags on an endpoint
5323  */
5324 static void
5325 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5326 {
5327         struct sctp_laddr *laddr;
5328
5329         /* first clear the flag */
5330         inp->ip_inp.inp.inp_vflag = 0;
5331         /* set the flag based on addresses on the ep list */
5332         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5333                 if (laddr->ifa == NULL) {
5334                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5335                             __func__);
5336                         continue;
5337                 }
5338                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5339                         continue;
5340                 }
5341                 switch (laddr->ifa->address.sa.sa_family) {
5342 #ifdef INET6
5343                 case AF_INET6:
5344                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5345                         break;
5346 #endif
5347 #ifdef INET
5348                 case AF_INET:
5349                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5350                         break;
5351 #endif
5352                 default:
5353                         break;
5354                 }
5355         }
5356 }
5357
5358 /*
5359  * Add the address to the endpoint local address list There is nothing to be
5360  * done if we are bound to all addresses
5361  */
5362 void
5363 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5364 {
5365         struct sctp_laddr *laddr;
5366         struct sctp_tcb *stcb;
5367         int fnd, error = 0;
5368
5369         fnd = 0;
5370
5371         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5372                 /* You are already bound to all. You have it already */
5373                 return;
5374         }
5375 #ifdef INET6
5376         if (ifa->address.sa.sa_family == AF_INET6) {
5377                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5378                         /* Can't bind a non-useable addr. */
5379                         return;
5380                 }
5381         }
5382 #endif
5383         /* first, is it already present? */
5384         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5385                 if (laddr->ifa == ifa) {
5386                         fnd = 1;
5387                         break;
5388                 }
5389         }
5390
5391         if (fnd == 0) {
5392                 /* Not in the ep list */
5393                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5394                 if (error != 0)
5395                         return;
5396                 inp->laddr_count++;
5397                 /* update inp_vflag flags */
5398                 switch (ifa->address.sa.sa_family) {
5399 #ifdef INET6
5400                 case AF_INET6:
5401                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5402                         break;
5403 #endif
5404 #ifdef INET
5405                 case AF_INET:
5406                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5407                         break;
5408 #endif
5409                 default:
5410                         break;
5411                 }
5412                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5413                         sctp_add_local_addr_restricted(stcb, ifa);
5414                 }
5415         }
5416         return;
5417 }
5418
5419
5420 /*
5421  * select a new (hopefully reachable) destination net (should only be used
5422  * when we deleted an ep addr that is the only usable source address to reach
5423  * the destination net)
5424  */
5425 static void
5426 sctp_select_primary_destination(struct sctp_tcb *stcb)
5427 {
5428         struct sctp_nets *net;
5429
5430         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5431                 /* for now, we'll just pick the first reachable one we find */
5432                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5433                         continue;
5434                 if (sctp_destination_is_reachable(stcb,
5435                     (struct sockaddr *)&net->ro._l_addr)) {
5436                         /* found a reachable destination */
5437                         stcb->asoc.primary_destination = net;
5438                 }
5439         }
5440         /* I can't there from here! ...we're gonna die shortly... */
5441 }
5442
5443
5444 /*
5445  * Delete the address from the endpoint local address list. There is nothing
5446  * to be done if we are bound to all addresses
5447  */
5448 void
5449 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5450 {
5451         struct sctp_laddr *laddr;
5452         int fnd;
5453
5454         fnd = 0;
5455         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5456                 /* You are already bound to all. You have it already */
5457                 return;
5458         }
5459         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5460                 if (laddr->ifa == ifa) {
5461                         fnd = 1;
5462                         break;
5463                 }
5464         }
5465         if (fnd && (inp->laddr_count < 2)) {
5466                 /* can't delete unless there are at LEAST 2 addresses */
5467                 return;
5468         }
5469         if (fnd) {
5470                 /*
5471                  * clean up any use of this address go through our
5472                  * associations and clear any last_used_address that match
5473                  * this one for each assoc, see if a new primary_destination
5474                  * is needed
5475                  */
5476                 struct sctp_tcb *stcb;
5477
5478                 /* clean up "next_addr_touse" */
5479                 if (inp->next_addr_touse == laddr)
5480                         /* delete this address */
5481                         inp->next_addr_touse = NULL;
5482
5483                 /* clean up "last_used_address" */
5484                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5485                         struct sctp_nets *net;
5486
5487                         SCTP_TCB_LOCK(stcb);
5488                         if (stcb->asoc.last_used_address == laddr)
5489                                 /* delete this address */
5490                                 stcb->asoc.last_used_address = NULL;
5491                         /*
5492                          * Now spin through all the nets and purge any ref
5493                          * to laddr
5494                          */
5495                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5496                                 if (net->ro._s_addr == laddr->ifa) {
5497                                         /* Yep, purge src address selected */
5498                                         sctp_rtentry_t *rt;
5499
5500                                         /* delete this address if cached */
5501                                         rt = net->ro.ro_rt;
5502                                         if (rt != NULL) {
5503                                                 RTFREE(rt);
5504                                                 net->ro.ro_rt = NULL;
5505                                         }
5506                                         sctp_free_ifa(net->ro._s_addr);
5507                                         net->ro._s_addr = NULL;
5508                                         net->src_addr_selected = 0;
5509                                 }
5510                         }
5511                         SCTP_TCB_UNLOCK(stcb);
5512                 }               /* for each tcb */
5513                 /* remove it from the ep list */
5514                 sctp_remove_laddr(laddr);
5515                 inp->laddr_count--;
5516                 /* update inp_vflag flags */
5517                 sctp_update_ep_vflag(inp);
5518         }
5519         return;
5520 }
5521
5522 /*
5523  * Add the address to the TCB local address restricted list.
5524  * This is a "pending" address list (eg. addresses waiting for an
5525  * ASCONF-ACK response) and cannot be used as a valid source address.
5526  */
5527 void
5528 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5529 {
5530         struct sctp_laddr *laddr;
5531         struct sctpladdr *list;
5532
5533         /*
5534          * Assumes TCB is locked.. and possibly the INP. May need to
5535          * confirm/fix that if we need it and is not the case.
5536          */
5537         list = &stcb->asoc.sctp_restricted_addrs;
5538
5539 #ifdef INET6
5540         if (ifa->address.sa.sa_family == AF_INET6) {
5541                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5542                         /* Can't bind a non-existent addr. */
5543                         return;
5544                 }
5545         }
5546 #endif
5547         /* does the address already exist? */
5548         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5549                 if (laddr->ifa == ifa) {
5550                         return;
5551                 }
5552         }
5553
5554         /* add to the list */
5555         (void)sctp_insert_laddr(list, ifa, 0);
5556         return;
5557 }
5558
5559 /*
5560  * Remove a local address from the TCB local address restricted list
5561  */
5562 void
5563 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5564 {
5565         struct sctp_inpcb *inp;
5566         struct sctp_laddr *laddr;
5567
5568         /*
5569          * This is called by asconf work. It is assumed that a) The TCB is
5570          * locked and b) The INP is locked. This is true in as much as I can
5571          * trace through the entry asconf code where I did these locks.
5572          * Again, the ASCONF code is a bit different in that it does lock
5573          * the INP during its work often times. This must be since we don't
5574          * want other proc's looking up things while what they are looking
5575          * up is changing :-D
5576          */
5577
5578         inp = stcb->sctp_ep;
5579         /* if subset bound and don't allow ASCONF's, can't delete last */
5580         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5581             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5582                 if (stcb->sctp_ep->laddr_count < 2) {
5583                         /* can't delete last address */
5584                         return;
5585                 }
5586         }
5587         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5588                 /* remove the address if it exists */
5589                 if (laddr->ifa == NULL)
5590                         continue;
5591                 if (laddr->ifa == ifa) {
5592                         sctp_remove_laddr(laddr);
5593                         return;
5594                 }
5595         }
5596
5597         /* address not found! */
5598         return;
5599 }
5600
5601 /*
5602  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5603  */
5604 /* sysctl */
5605 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5606 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5607
5608
5609
5610 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5611 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5612 int *sctp_cpuarry = NULL;
5613 void
5614 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5615 {
5616         /* Queue a packet to a processor for the specified core */
5617         struct sctp_mcore_queue *qent;
5618         struct sctp_mcore_ctrl *wkq;
5619         int need_wake = 0;
5620
5621         if (sctp_mcore_workers == NULL) {
5622                 /* Something went way bad during setup */
5623                 sctp_input_with_port(m, off, 0);
5624                 return;
5625         }
5626         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5627             (sizeof(struct sctp_mcore_queue)),
5628             SCTP_M_MCORE);
5629         if (qent == NULL) {
5630                 /* This is trouble  */
5631                 sctp_input_with_port(m, off, 0);
5632                 return;
5633         }
5634         qent->vn = curvnet;
5635         qent->m = m;
5636         qent->off = off;
5637         qent->v6 = 0;
5638         wkq = &sctp_mcore_workers[cpu_to_use];
5639         SCTP_MCORE_QLOCK(wkq);
5640
5641         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5642         if (wkq->running == 0) {
5643                 need_wake = 1;
5644         }
5645         SCTP_MCORE_QUNLOCK(wkq);
5646         if (need_wake) {
5647                 wakeup(&wkq->running);
5648         }
5649 }
5650
5651 static void
5652 sctp_mcore_thread(void *arg)
5653 {
5654
5655         struct sctp_mcore_ctrl *wkq;
5656         struct sctp_mcore_queue *qent;
5657
5658         wkq = (struct sctp_mcore_ctrl *)arg;
5659         struct mbuf *m;
5660         int off, v6;
5661
5662         /* Wait for first tickle */
5663         SCTP_MCORE_LOCK(wkq);
5664         wkq->running = 0;
5665         msleep(&wkq->running,
5666             &wkq->core_mtx,
5667             0, "wait for pkt", 0);
5668         SCTP_MCORE_UNLOCK(wkq);
5669
5670         /* Bind to our cpu */
5671         thread_lock(curthread);
5672         sched_bind(curthread, wkq->cpuid);
5673         thread_unlock(curthread);
5674
5675         /* Now lets start working */
5676         SCTP_MCORE_LOCK(wkq);
5677         /* Now grab lock and go */
5678         for (;;) {
5679                 SCTP_MCORE_QLOCK(wkq);
5680 skip_sleep:
5681                 wkq->running = 1;
5682                 qent = TAILQ_FIRST(&wkq->que);
5683                 if (qent) {
5684                         TAILQ_REMOVE(&wkq->que, qent, next);
5685                         SCTP_MCORE_QUNLOCK(wkq);
5686                         CURVNET_SET(qent->vn);
5687                         m = qent->m;
5688                         off = qent->off;
5689                         v6 = qent->v6;
5690                         SCTP_FREE(qent, SCTP_M_MCORE);
5691                         if (v6 == 0) {
5692                                 sctp_input_with_port(m, off, 0);
5693                         } else {
5694                                 SCTP_PRINTF("V6 not yet supported\n");
5695                                 sctp_m_freem(m);
5696                         }
5697                         CURVNET_RESTORE();
5698                         SCTP_MCORE_QLOCK(wkq);
5699                 }
5700                 wkq->running = 0;
5701                 if (!TAILQ_EMPTY(&wkq->que)) {
5702                         goto skip_sleep;
5703                 }
5704                 SCTP_MCORE_QUNLOCK(wkq);
5705                 msleep(&wkq->running,
5706                     &wkq->core_mtx,
5707                     0, "wait for pkt", 0);
5708         }
5709 }
5710
5711 static void
5712 sctp_startup_mcore_threads(void)
5713 {
5714         int i, cpu;
5715
5716         if (mp_ncpus == 1)
5717                 return;
5718
5719         if (sctp_mcore_workers != NULL) {
5720                 /*
5721                  * Already been here in some previous vnet?
5722                  */
5723                 return;
5724         }
5725         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5726             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5727             SCTP_M_MCORE);
5728         if (sctp_mcore_workers == NULL) {
5729                 /* TSNH I hope */
5730                 return;
5731         }
5732         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5733             sizeof(struct sctp_mcore_ctrl)));
5734         /* Init the structures */
5735         for (i = 0; i <= mp_maxid; i++) {
5736                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5737                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5738                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5739                 sctp_mcore_workers[i].cpuid = i;
5740         }
5741         if (sctp_cpuarry == NULL) {
5742                 SCTP_MALLOC(sctp_cpuarry, int *,
5743                     (mp_ncpus * sizeof(int)),
5744                     SCTP_M_MCORE);
5745                 i = 0;
5746                 CPU_FOREACH(cpu) {
5747                         sctp_cpuarry[i] = cpu;
5748                         i++;
5749                 }
5750         }
5751         /* Now start them all */
5752         CPU_FOREACH(cpu) {
5753                 (void)kproc_create(sctp_mcore_thread,
5754                     (void *)&sctp_mcore_workers[cpu],
5755                     &sctp_mcore_workers[cpu].thread_proc,
5756                     RFPROC,
5757                     SCTP_KTHREAD_PAGES,
5758                     SCTP_MCORE_NAME);
5759
5760         }
5761 }
5762 #endif
5763
5764 void
5765 sctp_pcb_init()
5766 {
5767         /*
5768          * SCTP initialization for the PCB structures should be called by
5769          * the sctp_init() function.
5770          */
5771         int i;
5772         struct timeval tv;
5773
5774         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5775                 /* error I was called twice */
5776                 return;
5777         }
5778         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5779
5780 #if defined(SCTP_LOCAL_TRACE_BUF)
5781         memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log));
5782 #endif
5783 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5784         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5785             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5786             SCTP_M_MCORE);
5787 #endif
5788         (void)SCTP_GETTIME_TIMEVAL(&tv);
5789 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5790         memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1));
5791         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
5792         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
5793 #else
5794         memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat));
5795         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
5796         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
5797 #endif
5798         /* init the empty list of (All) Endpoints */
5799         LIST_INIT(&SCTP_BASE_INFO(listhead));
5800
5801
5802         /* init the hash table of endpoints */
5803         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5804         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5805         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5806         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5807             &SCTP_BASE_INFO(hashasocmark));
5808         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5809             &SCTP_BASE_INFO(hashmark));
5810         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5811             &SCTP_BASE_INFO(hashtcpmark));
5812         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5813
5814
5815         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5816             &SCTP_BASE_INFO(hashvrfmark));
5817
5818         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5819             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5820         /* init the zones */
5821         /*
5822          * FIX ME: Should check for NULL returns, but if it does fail we are
5823          * doomed to panic anyways... add later maybe.
5824          */
5825         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5826             sizeof(struct sctp_inpcb), maxsockets);
5827
5828         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5829             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5830
5831         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5832             sizeof(struct sctp_laddr),
5833             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5834
5835         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5836             sizeof(struct sctp_nets),
5837             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5838
5839         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5840             sizeof(struct sctp_tmit_chunk),
5841             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5842
5843         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5844             sizeof(struct sctp_queued_to_read),
5845             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5846
5847         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5848             sizeof(struct sctp_stream_queue_pending),
5849             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5850
5851         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5852             sizeof(struct sctp_asconf),
5853             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5854
5855         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5856             sizeof(struct sctp_asconf_ack),
5857             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5858
5859
5860         /* Master Lock INIT for info structure */
5861         SCTP_INP_INFO_LOCK_INIT();
5862         SCTP_STATLOG_INIT_LOCK();
5863
5864         SCTP_IPI_COUNT_INIT();
5865         SCTP_IPI_ADDR_INIT();
5866 #ifdef SCTP_PACKET_LOGGING
5867         SCTP_IP_PKTLOG_INIT();
5868 #endif
5869         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5870
5871         SCTP_WQ_ADDR_INIT();
5872         /* not sure if we need all the counts */
5873         SCTP_BASE_INFO(ipi_count_ep) = 0;
5874         /* assoc/tcb zone info */
5875         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5876         /* local addrlist zone info */
5877         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5878         /* remote addrlist zone info */
5879         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5880         /* chunk info */
5881         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5882
5883         /* socket queue zone info */
5884         SCTP_BASE_INFO(ipi_count_readq) = 0;
5885
5886         /* stream out queue cont */
5887         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5888
5889         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5890         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5891
5892         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5893
5894         /* Init the TIMEWAIT list */
5895         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5896                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5897         }
5898         sctp_startup_iterator();
5899
5900 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5901         sctp_startup_mcore_threads();
5902 #endif
5903
5904         /*
5905          * INIT the default VRF which for BSD is the only one, other O/S's
5906          * may have more. But initially they must start with one and then
5907          * add the VRF's as addresses are added.
5908          */
5909         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5910 }
5911
5912 /*
5913  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5914  */
5915 void
5916 sctp_pcb_finish(void)
5917 {
5918         struct sctp_vrflist *vrf_bucket;
5919         struct sctp_vrf *vrf, *nvrf;
5920         struct sctp_ifn *ifn, *nifn;
5921         struct sctp_ifa *ifa, *nifa;
5922         struct sctpvtaghead *chain;
5923         struct sctp_tagblock *twait_block, *prev_twait_block;
5924         struct sctp_laddr *wi, *nwi;
5925         int i;
5926         struct sctp_iterator *it, *nit;
5927
5928         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5929                 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5930                 return;
5931         }
5932         SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5933         /*
5934          * In FreeBSD the iterator thread never exits but we do clean up.
5935          * The only way FreeBSD reaches here is if we have VRF's but we
5936          * still add the ifdef to make it compile on old versions.
5937          */
5938 retry:
5939         SCTP_IPI_ITERATOR_WQ_LOCK();
5940         /*
5941          * sctp_iterator_worker() might be working on an it entry without
5942          * holding the lock.  We won't find it on the list either and
5943          * continue and free/destroy it.  While holding the lock, spin, to
5944          * avoid the race condition as sctp_iterator_worker() will have to
5945          * wait to re-aquire the lock.
5946          */
5947         if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5948                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5949                 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5950                     "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5951                 DELAY(10);
5952                 goto retry;
5953         }
5954         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5955                 if (it->vn != curvnet) {
5956                         continue;
5957                 }
5958                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5959                 if (it->function_atend != NULL) {
5960                         (*it->function_atend) (it->pointer, it->val);
5961                 }
5962                 SCTP_FREE(it, SCTP_M_ITER);
5963         }
5964         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5965         SCTP_ITERATOR_LOCK();
5966         if ((sctp_it_ctl.cur_it) &&
5967             (sctp_it_ctl.cur_it->vn == curvnet)) {
5968                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5969         }
5970         SCTP_ITERATOR_UNLOCK();
5971         SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5972         SCTP_WQ_ADDR_LOCK();
5973         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5974                 LIST_REMOVE(wi, sctp_nxt_addr);
5975                 SCTP_DECR_LADDR_COUNT();
5976                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5977                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
5978                 }
5979                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5980         }
5981         SCTP_WQ_ADDR_UNLOCK();
5982
5983         /*
5984          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5985          * destroyed first).
5986          */
5987         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5988         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5989                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5990                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5991                                 /* free the ifa */
5992                                 LIST_REMOVE(ifa, next_bucket);
5993                                 LIST_REMOVE(ifa, next_ifa);
5994                                 SCTP_FREE(ifa, SCTP_M_IFA);
5995                         }
5996                         /* free the ifn */
5997                         LIST_REMOVE(ifn, next_bucket);
5998                         LIST_REMOVE(ifn, next_ifn);
5999                         SCTP_FREE(ifn, SCTP_M_IFN);
6000                 }
6001                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
6002                 /* free the vrf */
6003                 LIST_REMOVE(vrf, next_vrf);
6004                 SCTP_FREE(vrf, SCTP_M_VRF);
6005         }
6006         /* free the vrf hashes */
6007         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
6008         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
6009
6010         /*
6011          * free the TIMEWAIT list elements malloc'd in the function
6012          * sctp_add_vtag_to_timewait()...
6013          */
6014         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6015                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
6016                 if (!LIST_EMPTY(chain)) {
6017                         prev_twait_block = NULL;
6018                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6019                                 if (prev_twait_block) {
6020                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6021                                 }
6022                                 prev_twait_block = twait_block;
6023                         }
6024                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6025                 }
6026         }
6027
6028         /* free the locks and mutexes */
6029 #ifdef SCTP_PACKET_LOGGING
6030         SCTP_IP_PKTLOG_DESTROY();
6031 #endif
6032         SCTP_IPI_ADDR_DESTROY();
6033         SCTP_STATLOG_DESTROY();
6034         SCTP_INP_INFO_LOCK_DESTROY();
6035
6036         SCTP_WQ_ADDR_DESTROY();
6037
6038         /* Get rid of other stuff too. */
6039         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6040                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6041         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6042                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6043         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6044                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6045
6046         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6047         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6048         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6049         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6050         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6051         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6052         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6053         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6054         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6055 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6056         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6057 #endif
6058 }
6059
6060
6061 int
6062 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6063     int offset, int limit,
6064     struct sockaddr *src, struct sockaddr *dst,
6065     struct sockaddr *altsa, uint16_t port)
6066 {
6067         /*
6068          * grub through the INIT pulling addresses and loading them to the
6069          * nets structure in the asoc. The from address in the mbuf should
6070          * also be loaded (if it is not already). This routine can be called
6071          * with either INIT or INIT-ACK's as long as the m points to the IP
6072          * packet and the offset points to the beginning of the parameters.
6073          */
6074         struct sctp_inpcb *inp;
6075         struct sctp_nets *net, *nnet, *net_tmp;
6076         struct sctp_paramhdr *phdr, param_buf;
6077         struct sctp_tcb *stcb_tmp;
6078         uint16_t ptype, plen;
6079         struct sockaddr *sa;
6080         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6081         struct sctp_auth_random *p_random = NULL;
6082         uint16_t random_len = 0;
6083         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6084         struct sctp_auth_hmac_algo *hmacs = NULL;
6085         uint16_t hmacs_len = 0;
6086         uint8_t saw_asconf = 0;
6087         uint8_t saw_asconf_ack = 0;
6088         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6089         struct sctp_auth_chunk_list *chunks = NULL;
6090         uint16_t num_chunks = 0;
6091         sctp_key_t *new_key;
6092         uint32_t keylen;
6093         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6094         uint8_t peer_supports_ecn;
6095         uint8_t peer_supports_prsctp;
6096         uint8_t peer_supports_auth;
6097         uint8_t peer_supports_asconf;
6098         uint8_t peer_supports_asconf_ack;
6099         uint8_t peer_supports_reconfig;
6100         uint8_t peer_supports_nrsack;
6101         uint8_t peer_supports_pktdrop;
6102         uint8_t peer_supports_idata;
6103 #ifdef INET
6104         struct sockaddr_in sin;
6105 #endif
6106 #ifdef INET6
6107         struct sockaddr_in6 sin6;
6108 #endif
6109
6110         /* First get the destination address setup too. */
6111 #ifdef INET
6112         memset(&sin, 0, sizeof(sin));
6113         sin.sin_family = AF_INET;
6114         sin.sin_len = sizeof(sin);
6115         sin.sin_port = stcb->rport;
6116 #endif
6117 #ifdef INET6
6118         memset(&sin6, 0, sizeof(sin6));
6119         sin6.sin6_family = AF_INET6;
6120         sin6.sin6_len = sizeof(struct sockaddr_in6);
6121         sin6.sin6_port = stcb->rport;
6122 #endif
6123         if (altsa) {
6124                 sa = altsa;
6125         } else {
6126                 sa = src;
6127         }
6128         peer_supports_idata = 0;
6129         peer_supports_ecn = 0;
6130         peer_supports_prsctp = 0;
6131         peer_supports_auth = 0;
6132         peer_supports_asconf = 0;
6133         peer_supports_reconfig = 0;
6134         peer_supports_nrsack = 0;
6135         peer_supports_pktdrop = 0;
6136         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6137                 /* mark all addresses that we have currently on the list */
6138                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6139         }
6140         /* does the source address already exist? if so skip it */
6141         inp = stcb->sctp_ep;
6142         atomic_add_int(&stcb->asoc.refcnt, 1);
6143         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6144         atomic_add_int(&stcb->asoc.refcnt, -1);
6145
6146         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6147                 /* we must add the source address */
6148                 /* no scope set here since we have a tcb already. */
6149                 switch (sa->sa_family) {
6150 #ifdef INET
6151                 case AF_INET:
6152                         if (stcb->asoc.scope.ipv4_addr_legal) {
6153                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6154                                         return (-1);
6155                                 }
6156                         }
6157                         break;
6158 #endif
6159 #ifdef INET6
6160                 case AF_INET6:
6161                         if (stcb->asoc.scope.ipv6_addr_legal) {
6162                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6163                                         return (-2);
6164                                 }
6165                         }
6166                         break;
6167 #endif
6168                 default:
6169                         break;
6170                 }
6171         } else {
6172                 if (net_tmp != NULL && stcb_tmp == stcb) {
6173                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6174                 } else if (stcb_tmp != stcb) {
6175                         /* It belongs to another association? */
6176                         if (stcb_tmp)
6177                                 SCTP_TCB_UNLOCK(stcb_tmp);
6178                         return (-3);
6179                 }
6180         }
6181         if (stcb->asoc.state == 0) {
6182                 /* the assoc was freed? */
6183                 return (-4);
6184         }
6185         /* now we must go through each of the params. */
6186         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
6187         while (phdr) {
6188                 ptype = ntohs(phdr->param_type);
6189                 plen = ntohs(phdr->param_length);
6190                 /*
6191                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6192                  * (uint32_t)ptype, (int)plen);
6193                  */
6194                 if (offset + plen > limit) {
6195                         break;
6196                 }
6197                 if (plen == 0) {
6198                         break;
6199                 }
6200 #ifdef INET
6201                 if (ptype == SCTP_IPV4_ADDRESS) {
6202                         if (stcb->asoc.scope.ipv4_addr_legal) {
6203                                 struct sctp_ipv4addr_param *p4, p4_buf;
6204
6205                                 /* ok get the v4 address and check/add */
6206                                 phdr = sctp_get_next_param(m, offset,
6207                                     (struct sctp_paramhdr *)&p4_buf,
6208                                     sizeof(p4_buf));
6209                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6210                                     phdr == NULL) {
6211                                         return (-5);
6212                                 }
6213                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6214                                 sin.sin_addr.s_addr = p4->addr;
6215                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6216                                         /* Skip multi-cast addresses */
6217                                         goto next_param;
6218                                 }
6219                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6220                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6221                                         goto next_param;
6222                                 }
6223                                 sa = (struct sockaddr *)&sin;
6224                                 inp = stcb->sctp_ep;
6225                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6226                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6227                                     dst, stcb);
6228                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6229
6230                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6231                                     inp == NULL) {
6232                                         /* we must add the source address */
6233                                         /*
6234                                          * no scope set since we have a tcb
6235                                          * already
6236                                          */
6237
6238                                         /*
6239                                          * we must validate the state again
6240                                          * here
6241                                          */
6242                         add_it_now:
6243                                         if (stcb->asoc.state == 0) {
6244                                                 /* the assoc was freed? */
6245                                                 return (-7);
6246                                         }
6247                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6248                                                 return (-8);
6249                                         }
6250                                 } else if (stcb_tmp == stcb) {
6251                                         if (stcb->asoc.state == 0) {
6252                                                 /* the assoc was freed? */
6253                                                 return (-10);
6254                                         }
6255                                         if (net != NULL) {
6256                                                 /* clear flag */
6257                                                 net->dest_state &=
6258                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6259                                         }
6260                                 } else {
6261                                         /*
6262                                          * strange, address is in another
6263                                          * assoc? straighten out locks.
6264                                          */
6265                                         if (stcb_tmp) {
6266                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6267                                                         struct mbuf *op_err;
6268                                                         char msg[SCTP_DIAG_INFO_LEN];
6269
6270                                                         /*
6271                                                          * in setup state we
6272                                                          * abort this guy
6273                                                          */
6274                                                         snprintf(msg, sizeof(msg),
6275                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6276                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6277                                                             msg);
6278                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6279                                                             stcb_tmp, op_err,
6280                                                             SCTP_SO_NOT_LOCKED);
6281                                                         goto add_it_now;
6282                                                 }
6283                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6284                                         }
6285                                         if (stcb->asoc.state == 0) {
6286                                                 /* the assoc was freed? */
6287                                                 return (-12);
6288                                         }
6289                                         return (-13);
6290                                 }
6291                         }
6292                 } else
6293 #endif
6294 #ifdef INET6
6295                 if (ptype == SCTP_IPV6_ADDRESS) {
6296                         if (stcb->asoc.scope.ipv6_addr_legal) {
6297                                 /* ok get the v6 address and check/add */
6298                                 struct sctp_ipv6addr_param *p6, p6_buf;
6299
6300                                 phdr = sctp_get_next_param(m, offset,
6301                                     (struct sctp_paramhdr *)&p6_buf,
6302                                     sizeof(p6_buf));
6303                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6304                                     phdr == NULL) {
6305                                         return (-14);
6306                                 }
6307                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6308                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6309                                     sizeof(p6->addr));
6310                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6311                                         /* Skip multi-cast addresses */
6312                                         goto next_param;
6313                                 }
6314                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6315                                         /*
6316                                          * Link local make no sense without
6317                                          * scope
6318                                          */
6319                                         goto next_param;
6320                                 }
6321                                 sa = (struct sockaddr *)&sin6;
6322                                 inp = stcb->sctp_ep;
6323                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6324                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6325                                     dst, stcb);
6326                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6327                                 if (stcb_tmp == NULL &&
6328                                     (inp == stcb->sctp_ep || inp == NULL)) {
6329                                         /*
6330                                          * we must validate the state again
6331                                          * here
6332                                          */
6333                         add_it_now6:
6334                                         if (stcb->asoc.state == 0) {
6335                                                 /* the assoc was freed? */
6336                                                 return (-16);
6337                                         }
6338                                         /*
6339                                          * we must add the address, no scope
6340                                          * set
6341                                          */
6342                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6343                                                 return (-17);
6344                                         }
6345                                 } else if (stcb_tmp == stcb) {
6346                                         /*
6347                                          * we must validate the state again
6348                                          * here
6349                                          */
6350                                         if (stcb->asoc.state == 0) {
6351                                                 /* the assoc was freed? */
6352                                                 return (-19);
6353                                         }
6354                                         if (net != NULL) {
6355                                                 /* clear flag */
6356                                                 net->dest_state &=
6357                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6358                                         }
6359                                 } else {
6360                                         /*
6361                                          * strange, address is in another
6362                                          * assoc? straighten out locks.
6363                                          */
6364                                         if (stcb_tmp) {
6365                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6366                                                         struct mbuf *op_err;
6367                                                         char msg[SCTP_DIAG_INFO_LEN];
6368
6369                                                         /*
6370                                                          * in setup state we
6371                                                          * abort this guy
6372                                                          */
6373                                                         snprintf(msg, sizeof(msg),
6374                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6375                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6376                                                             msg);
6377                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6378                                                             stcb_tmp, op_err,
6379                                                             SCTP_SO_NOT_LOCKED);
6380                                                         goto add_it_now6;
6381                                                 }
6382                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6383                                         }
6384                                         if (stcb->asoc.state == 0) {
6385                                                 /* the assoc was freed? */
6386                                                 return (-21);
6387                                         }
6388                                         return (-22);
6389                                 }
6390                         }
6391                 } else
6392 #endif
6393                 if (ptype == SCTP_ECN_CAPABLE) {
6394                         peer_supports_ecn = 1;
6395                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6396                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6397                                 struct sctp_adaptation_layer_indication ai,
6398                                                                 *aip;
6399
6400                                 phdr = sctp_get_next_param(m, offset,
6401                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6402                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6403                                 if (aip) {
6404                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6405                                         stcb->asoc.adaptation_needed = 1;
6406                                 }
6407                         }
6408                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6409                         struct sctp_asconf_addr_param lstore, *fee;
6410                         int lptype;
6411                         struct sockaddr *lsa = NULL;
6412 #ifdef INET
6413                         struct sctp_asconf_addrv4_param *fii;
6414 #endif
6415
6416                         if (stcb->asoc.asconf_supported == 0) {
6417                                 return (-100);
6418                         }
6419                         if (plen > sizeof(lstore)) {
6420                                 return (-23);
6421                         }
6422                         phdr = sctp_get_next_param(m, offset,
6423                             (struct sctp_paramhdr *)&lstore,
6424                             plen);
6425                         if (phdr == NULL) {
6426                                 return (-24);
6427                         }
6428                         fee = (struct sctp_asconf_addr_param *)phdr;
6429                         lptype = ntohs(fee->addrp.ph.param_type);
6430                         switch (lptype) {
6431 #ifdef INET
6432                         case SCTP_IPV4_ADDRESS:
6433                                 if (plen !=
6434                                     sizeof(struct sctp_asconf_addrv4_param)) {
6435                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6436                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6437                                             plen);
6438                                 } else {
6439                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6440                                         sin.sin_addr.s_addr = fii->addrp.addr;
6441                                         lsa = (struct sockaddr *)&sin;
6442                                 }
6443                                 break;
6444 #endif
6445 #ifdef INET6
6446                         case SCTP_IPV6_ADDRESS:
6447                                 if (plen !=
6448                                     sizeof(struct sctp_asconf_addr_param)) {
6449                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6450                                             (int)sizeof(struct sctp_asconf_addr_param),
6451                                             plen);
6452                                 } else {
6453                                         memcpy(sin6.sin6_addr.s6_addr,
6454                                             fee->addrp.addr,
6455                                             sizeof(fee->addrp.addr));
6456                                         lsa = (struct sockaddr *)&sin6;
6457                                 }
6458                                 break;
6459 #endif
6460                         default:
6461                                 break;
6462                         }
6463                         if (lsa) {
6464                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6465                         }
6466                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6467                         stcb->asoc.peer_supports_nat = 1;
6468                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6469                         /* Peer supports pr-sctp */
6470                         peer_supports_prsctp = 1;
6471                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6472                         /* A supported extension chunk */
6473                         struct sctp_supported_chunk_types_param *pr_supported;
6474                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6475                         int num_ent, i;
6476
6477                         if (plen > sizeof(local_store)) {
6478                                 return (-35);
6479                         }
6480                         phdr = sctp_get_next_param(m, offset,
6481                             (struct sctp_paramhdr *)&local_store, plen);
6482                         if (phdr == NULL) {
6483                                 return (-25);
6484                         }
6485                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6486                         num_ent = plen - sizeof(struct sctp_paramhdr);
6487                         for (i = 0; i < num_ent; i++) {
6488                                 switch (pr_supported->chunk_types[i]) {
6489                                 case SCTP_ASCONF:
6490                                         peer_supports_asconf = 1;
6491                                         break;
6492                                 case SCTP_ASCONF_ACK:
6493                                         peer_supports_asconf_ack = 1;
6494                                         break;
6495                                 case SCTP_FORWARD_CUM_TSN:
6496                                         peer_supports_prsctp = 1;
6497                                         break;
6498                                 case SCTP_PACKET_DROPPED:
6499                                         peer_supports_pktdrop = 1;
6500                                         break;
6501                                 case SCTP_NR_SELECTIVE_ACK:
6502                                         peer_supports_nrsack = 1;
6503                                         break;
6504                                 case SCTP_STREAM_RESET:
6505                                         peer_supports_reconfig = 1;
6506                                         break;
6507                                 case SCTP_AUTHENTICATION:
6508                                         peer_supports_auth = 1;
6509                                         break;
6510                                 case SCTP_IDATA:
6511                                         peer_supports_idata = 1;
6512                                         break;
6513                                 default:
6514                                         /* one I have not learned yet */
6515                                         break;
6516
6517                                 }
6518                         }
6519                 } else if (ptype == SCTP_RANDOM) {
6520                         if (plen > sizeof(random_store))
6521                                 break;
6522                         if (got_random) {
6523                                 /* already processed a RANDOM */
6524                                 goto next_param;
6525                         }
6526                         phdr = sctp_get_next_param(m, offset,
6527                             (struct sctp_paramhdr *)random_store,
6528                             plen);
6529                         if (phdr == NULL)
6530                                 return (-26);
6531                         p_random = (struct sctp_auth_random *)phdr;
6532                         random_len = plen - sizeof(*p_random);
6533                         /* enforce the random length */
6534                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6535                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6536                                 return (-27);
6537                         }
6538                         got_random = 1;
6539                 } else if (ptype == SCTP_HMAC_LIST) {
6540                         uint16_t num_hmacs;
6541                         uint16_t i;
6542
6543                         if (plen > sizeof(hmacs_store))
6544                                 break;
6545                         if (got_hmacs) {
6546                                 /* already processed a HMAC list */
6547                                 goto next_param;
6548                         }
6549                         phdr = sctp_get_next_param(m, offset,
6550                             (struct sctp_paramhdr *)hmacs_store,
6551                             plen);
6552                         if (phdr == NULL)
6553                                 return (-28);
6554                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6555                         hmacs_len = plen - sizeof(*hmacs);
6556                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6557                         /* validate the hmac list */
6558                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6559                                 return (-29);
6560                         }
6561                         if (stcb->asoc.peer_hmacs != NULL)
6562                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6563                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6564                         if (stcb->asoc.peer_hmacs != NULL) {
6565                                 for (i = 0; i < num_hmacs; i++) {
6566                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6567                                             ntohs(hmacs->hmac_ids[i]));
6568                                 }
6569                         }
6570                         got_hmacs = 1;
6571                 } else if (ptype == SCTP_CHUNK_LIST) {
6572                         int i;
6573
6574                         if (plen > sizeof(chunks_store))
6575                                 break;
6576                         if (got_chklist) {
6577                                 /* already processed a Chunks list */
6578                                 goto next_param;
6579                         }
6580                         phdr = sctp_get_next_param(m, offset,
6581                             (struct sctp_paramhdr *)chunks_store,
6582                             plen);
6583                         if (phdr == NULL)
6584                                 return (-30);
6585                         chunks = (struct sctp_auth_chunk_list *)phdr;
6586                         num_chunks = plen - sizeof(*chunks);
6587                         if (stcb->asoc.peer_auth_chunks != NULL)
6588                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6589                         else
6590                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6591                         for (i = 0; i < num_chunks; i++) {
6592                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6593                                     stcb->asoc.peer_auth_chunks);
6594                                 /* record asconf/asconf-ack if listed */
6595                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6596                                         saw_asconf = 1;
6597                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6598                                         saw_asconf_ack = 1;
6599
6600                         }
6601                         got_chklist = 1;
6602                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6603                             (ptype == SCTP_STATE_COOKIE) ||
6604                             (ptype == SCTP_UNRECOG_PARAM) ||
6605                             (ptype == SCTP_COOKIE_PRESERVE) ||
6606                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6607                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6608                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6609                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6610                     (ptype == SCTP_SUCCESS_REPORT)) {
6611                          /* don't care */ ;
6612                 } else {
6613                         if ((ptype & 0x8000) == 0x0000) {
6614                                 /*
6615                                  * must stop processing the rest of the
6616                                  * param's. Any report bits were handled
6617                                  * with the call to
6618                                  * sctp_arethere_unrecognized_parameters()
6619                                  * when the INIT or INIT-ACK was first seen.
6620                                  */
6621                                 break;
6622                         }
6623                 }
6624
6625 next_param:
6626                 offset += SCTP_SIZE32(plen);
6627                 if (offset >= limit) {
6628                         break;
6629                 }
6630                 phdr = sctp_get_next_param(m, offset, &param_buf,
6631                     sizeof(param_buf));
6632         }
6633         /* Now check to see if we need to purge any addresses */
6634         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6635                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6636                     SCTP_ADDR_NOT_IN_ASSOC) {
6637                         /* This address has been removed from the asoc */
6638                         /* remove and free it */
6639                         stcb->asoc.numnets--;
6640                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6641                         sctp_free_remote_addr(net);
6642                         if (net == stcb->asoc.primary_destination) {
6643                                 stcb->asoc.primary_destination = NULL;
6644                                 sctp_select_primary_destination(stcb);
6645                         }
6646                 }
6647         }
6648         if ((stcb->asoc.ecn_supported == 1) &&
6649             (peer_supports_ecn == 0)) {
6650                 stcb->asoc.ecn_supported = 0;
6651         }
6652         if ((stcb->asoc.prsctp_supported == 1) &&
6653             (peer_supports_prsctp == 0)) {
6654                 stcb->asoc.prsctp_supported = 0;
6655         }
6656         if ((stcb->asoc.auth_supported == 1) &&
6657             ((peer_supports_auth == 0) ||
6658             (got_random == 0) || (got_hmacs == 0))) {
6659                 stcb->asoc.auth_supported = 0;
6660         }
6661         if ((stcb->asoc.asconf_supported == 1) &&
6662             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6663             (stcb->asoc.auth_supported == 0) ||
6664             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6665                 stcb->asoc.asconf_supported = 0;
6666         }
6667         if ((stcb->asoc.reconfig_supported == 1) &&
6668             (peer_supports_reconfig == 0)) {
6669                 stcb->asoc.reconfig_supported = 0;
6670         }
6671         if ((stcb->asoc.idata_supported == 1) &&
6672             (peer_supports_idata == 0)) {
6673                 stcb->asoc.idata_supported = 0;
6674         }
6675         if ((stcb->asoc.nrsack_supported == 1) &&
6676             (peer_supports_nrsack == 0)) {
6677                 stcb->asoc.nrsack_supported = 0;
6678         }
6679         if ((stcb->asoc.pktdrop_supported == 1) &&
6680             (peer_supports_pktdrop == 0)) {
6681                 stcb->asoc.pktdrop_supported = 0;
6682         }
6683         /* validate authentication required parameters */
6684         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6685                 /* peer does not support auth but sent a chunks list? */
6686                 return (-31);
6687         }
6688         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6689                 /* peer supports asconf but not auth? */
6690                 return (-32);
6691         } else if ((peer_supports_asconf == 1) &&
6692                     (peer_supports_auth == 1) &&
6693             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6694                 return (-33);
6695         }
6696         /* concatenate the full random key */
6697         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6698         if (chunks != NULL) {
6699                 keylen += sizeof(*chunks) + num_chunks;
6700         }
6701         new_key = sctp_alloc_key(keylen);
6702         if (new_key != NULL) {
6703                 /* copy in the RANDOM */
6704                 if (p_random != NULL) {
6705                         keylen = sizeof(*p_random) + random_len;
6706                         memcpy(new_key->key, p_random, keylen);
6707                 }
6708                 /* append in the AUTH chunks */
6709                 if (chunks != NULL) {
6710                         memcpy(new_key->key + keylen, chunks,
6711                             sizeof(*chunks) + num_chunks);
6712                         keylen += sizeof(*chunks) + num_chunks;
6713                 }
6714                 /* append in the HMACs */
6715                 if (hmacs != NULL) {
6716                         memcpy(new_key->key + keylen, hmacs,
6717                             sizeof(*hmacs) + hmacs_len);
6718                 }
6719         } else {
6720                 /* failed to get memory for the key */
6721                 return (-34);
6722         }
6723         if (stcb->asoc.authinfo.peer_random != NULL)
6724                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6725         stcb->asoc.authinfo.peer_random = new_key;
6726         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6727         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6728
6729         return (0);
6730 }
6731
6732 int
6733 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6734     struct sctp_nets *net)
6735 {
6736         /* make sure the requested primary address exists in the assoc */
6737         if (net == NULL && sa)
6738                 net = sctp_findnet(stcb, sa);
6739
6740         if (net == NULL) {
6741                 /* didn't find the requested primary address! */
6742                 return (-1);
6743         } else {
6744                 /* set the primary address */
6745                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6746                         /* Must be confirmed, so queue to set */
6747                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6748                         return (0);
6749                 }
6750                 stcb->asoc.primary_destination = net;
6751                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6752                         sctp_free_remote_addr(stcb->asoc.alternate);
6753                         stcb->asoc.alternate = NULL;
6754                 }
6755                 net = TAILQ_FIRST(&stcb->asoc.nets);
6756                 if (net != stcb->asoc.primary_destination) {
6757                         /*
6758                          * first one on the list is NOT the primary
6759                          * sctp_cmpaddr() is much more efficient if the
6760                          * primary is the first on the list, make it so.
6761                          */
6762                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6763                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6764                 }
6765                 return (0);
6766         }
6767 }
6768
6769 int
6770 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6771 {
6772         /*
6773          * This function serves two purposes. It will see if a TAG can be
6774          * re-used and return 1 for yes it is ok and 0 for don't use that
6775          * tag. A secondary function it will do is purge out old tags that
6776          * can be removed.
6777          */
6778         struct sctpvtaghead *chain;
6779         struct sctp_tagblock *twait_block;
6780         struct sctpasochead *head;
6781         struct sctp_tcb *stcb;
6782         int i;
6783
6784         SCTP_INP_INFO_RLOCK();
6785         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6786             SCTP_BASE_INFO(hashasocmark))];
6787         LIST_FOREACH(stcb, head, sctp_asocs) {
6788                 /*
6789                  * We choose not to lock anything here. TCB's can't be
6790                  * removed since we have the read lock, so they can't be
6791                  * freed on us, same thing for the INP. I may be wrong with
6792                  * this assumption, but we will go with it for now :-)
6793                  */
6794                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6795                         continue;
6796                 }
6797                 if (stcb->asoc.my_vtag == tag) {
6798                         /* candidate */
6799                         if (stcb->rport != rport) {
6800                                 continue;
6801                         }
6802                         if (stcb->sctp_ep->sctp_lport != lport) {
6803                                 continue;
6804                         }
6805                         /* Its a used tag set */
6806                         SCTP_INP_INFO_RUNLOCK();
6807                         return (0);
6808                 }
6809         }
6810         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6811         /* Now what about timed wait ? */
6812         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6813                 /*
6814                  * Block(s) are present, lets see if we have this tag in the
6815                  * list
6816                  */
6817                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6818                         if (twait_block->vtag_block[i].v_tag == 0) {
6819                                 /* not used */
6820                                 continue;
6821                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6822                             now->tv_sec) {
6823                                 /* Audit expires this guy */
6824                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6825                                 twait_block->vtag_block[i].v_tag = 0;
6826                                 twait_block->vtag_block[i].lport = 0;
6827                                 twait_block->vtag_block[i].rport = 0;
6828                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6829                                     (twait_block->vtag_block[i].lport == lport) &&
6830                             (twait_block->vtag_block[i].rport == rport)) {
6831                                 /* Bad tag, sorry :< */
6832                                 SCTP_INP_INFO_RUNLOCK();
6833                                 return (0);
6834                         }
6835                 }
6836         }
6837         SCTP_INP_INFO_RUNLOCK();
6838         return (1);
6839 }
6840
6841 static void
6842 sctp_drain_mbufs(struct sctp_tcb *stcb)
6843 {
6844         /*
6845          * We must hunt this association for MBUF's past the cumack (i.e.
6846          * out of order data that we can renege on).
6847          */
6848         struct sctp_association *asoc;
6849         struct sctp_tmit_chunk *chk, *nchk;
6850         uint32_t cumulative_tsn_p1;
6851         struct sctp_queued_to_read *control, *ncontrol;
6852         int cnt, strmat;
6853         uint32_t gap, i;
6854         int fnd = 0;
6855
6856         /* We look for anything larger than the cum-ack + 1 */
6857
6858         asoc = &stcb->asoc;
6859         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6860                 /* none we can reneg on. */
6861                 return;
6862         }
6863         SCTP_STAT_INCR(sctps_protocol_drains_done);
6864         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6865         cnt = 0;
6866         /* Ok that was fun, now we will drain all the inbound streams? */
6867         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6868                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) {
6869 #ifdef INVARIANTS
6870                         if (control->on_strm_q != SCTP_ON_ORDERED) {
6871                                 panic("Huh control: %p on_q: %d -- not ordered?",
6872                                     control, control->on_strm_q);
6873                         }
6874 #endif
6875                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6876                                 /* Yep it is above cum-ack */
6877                                 cnt++;
6878                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6879                                 KASSERT(control->length > 0, ("control has zero length"));
6880                                 if (asoc->size_on_all_streams >= control->length) {
6881                                         asoc->size_on_all_streams -= control->length;
6882                                 } else {
6883 #ifdef INVARIANTS
6884                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6885 #else
6886                                         asoc->size_on_all_streams = 0;
6887 #endif
6888                                 }
6889                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6890                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6891                                 if (control->on_read_q) {
6892                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6893                                         control->on_read_q = 0;
6894                                 }
6895                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm);
6896                                 control->on_strm_q = 0;
6897                                 if (control->data) {
6898                                         sctp_m_freem(control->data);
6899                                         control->data = NULL;
6900                                 }
6901                                 sctp_free_remote_addr(control->whoFrom);
6902                                 /* Now its reasm? */
6903                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6904                                         cnt++;
6905                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6906                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6907                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6908                                                 asoc->size_on_reasm_queue -= chk->send_size;
6909                                         } else {
6910 #ifdef INVARIANTS
6911                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6912 #else
6913                                                 asoc->size_on_reasm_queue = 0;
6914 #endif
6915                                         }
6916                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6917                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6918                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6919                                         if (chk->data) {
6920                                                 sctp_m_freem(chk->data);
6921                                                 chk->data = NULL;
6922                                         }
6923                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6924                                 }
6925                                 sctp_free_a_readq(stcb, control);
6926                         }
6927                 }
6928                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) {
6929 #ifdef INVARIANTS
6930                         if (control->on_strm_q != SCTP_ON_UNORDERED) {
6931                                 panic("Huh control: %p on_q: %d -- not unordered?",
6932                                     control, control->on_strm_q);
6933                         }
6934 #endif
6935                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6936                                 /* Yep it is above cum-ack */
6937                                 cnt++;
6938                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6939                                 KASSERT(control->length > 0, ("control has zero length"));
6940                                 if (asoc->size_on_all_streams >= control->length) {
6941                                         asoc->size_on_all_streams -= control->length;
6942                                 } else {
6943 #ifdef INVARIANTS
6944                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6945 #else
6946                                         asoc->size_on_all_streams = 0;
6947 #endif
6948                                 }
6949                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6950                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6951                                 if (control->on_read_q) {
6952                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6953                                         control->on_read_q = 0;
6954                                 }
6955                                 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm);
6956                                 control->on_strm_q = 0;
6957                                 if (control->data) {
6958                                         sctp_m_freem(control->data);
6959                                         control->data = NULL;
6960                                 }
6961                                 sctp_free_remote_addr(control->whoFrom);
6962                                 /* Now its reasm? */
6963                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6964                                         cnt++;
6965                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6966                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6967                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6968                                                 asoc->size_on_reasm_queue -= chk->send_size;
6969                                         } else {
6970 #ifdef INVARIANTS
6971                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6972 #else
6973                                                 asoc->size_on_reasm_queue = 0;
6974 #endif
6975                                         }
6976                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6977                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6978                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6979                                         if (chk->data) {
6980                                                 sctp_m_freem(chk->data);
6981                                                 chk->data = NULL;
6982                                         }
6983                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6984                                 }
6985                                 sctp_free_a_readq(stcb, control);
6986                         }
6987                 }
6988         }
6989         if (cnt) {
6990                 /* We must back down to see what the new highest is */
6991                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6992                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6993                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6994                                 asoc->highest_tsn_inside_map = i;
6995                                 fnd = 1;
6996                                 break;
6997                         }
6998                 }
6999                 if (!fnd) {
7000                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
7001                 }
7002                 /*
7003                  * Question, should we go through the delivery queue? The
7004                  * only reason things are on here is the app not reading OR
7005                  * a p-d-api up. An attacker COULD send enough in to
7006                  * initiate the PD-API and then send a bunch of stuff to
7007                  * other streams... these would wind up on the delivery
7008                  * queue.. and then we would not get to them. But in order
7009                  * to do this I then have to back-track and un-deliver
7010                  * sequence numbers in streams.. el-yucko. I think for now
7011                  * we will NOT look at the delivery queue and leave it to be
7012                  * something to consider later. An alternative would be to
7013                  * abort the P-D-API with a notification and then deliver
7014                  * the data.... Or another method might be to keep track of
7015                  * how many times the situation occurs and if we see a
7016                  * possible attack underway just abort the association.
7017                  */
7018 #ifdef SCTP_DEBUG
7019                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
7020 #endif
7021                 /*
7022                  * Now do we need to find a new
7023                  * asoc->highest_tsn_inside_map?
7024                  */
7025                 asoc->last_revoke_count = cnt;
7026                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
7027                 /* sa_ignore NO_NULL_CHK */
7028                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
7029                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
7030         }
7031         /*
7032          * Another issue, in un-setting the TSN's in the mapping array we
7033          * DID NOT adjust the highest_tsn marker.  This will cause one of
7034          * two things to occur. It may cause us to do extra work in checking
7035          * for our mapping array movement. More importantly it may cause us
7036          * to SACK every datagram. This may not be a bad thing though since
7037          * we will recover once we get our cum-ack above and all this stuff
7038          * we dumped recovered.
7039          */
7040 }
7041
7042 void
7043 sctp_drain()
7044 {
7045         /*
7046          * We must walk the PCB lists for ALL associations here. The system
7047          * is LOW on MBUF's and needs help. This is where reneging will
7048          * occur. We really hope this does NOT happen!
7049          */
7050         VNET_ITERATOR_DECL(vnet_iter);
7051         VNET_LIST_RLOCK_NOSLEEP();
7052         VNET_FOREACH(vnet_iter) {
7053                 CURVNET_SET(vnet_iter);
7054                 struct sctp_inpcb *inp;
7055                 struct sctp_tcb *stcb;
7056
7057                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
7058                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7059 #ifdef VIMAGE
7060                         continue;
7061 #else
7062                         return;
7063 #endif
7064                 }
7065                 SCTP_INP_INFO_RLOCK();
7066                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7067                         /* For each endpoint */
7068                         SCTP_INP_RLOCK(inp);
7069                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7070                                 /* For each association */
7071                                 SCTP_TCB_LOCK(stcb);
7072                                 sctp_drain_mbufs(stcb);
7073                                 SCTP_TCB_UNLOCK(stcb);
7074                         }
7075                         SCTP_INP_RUNLOCK(inp);
7076                 }
7077                 SCTP_INP_INFO_RUNLOCK();
7078                 CURVNET_RESTORE();
7079         }
7080         VNET_LIST_RUNLOCK_NOSLEEP();
7081 }
7082
7083 /*
7084  * start a new iterator
7085  * iterates through all endpoints and associations based on the pcb_state
7086  * flags and asoc_state.  "af" (mandatory) is executed for all matching
7087  * assocs and "ef" (optional) is executed when the iterator completes.
7088  * "inpf" (optional) is executed for each new endpoint as it is being
7089  * iterated through. inpe (optional) is called when the inp completes
7090  * its way through all the stcbs.
7091  */
7092 int
7093 sctp_initiate_iterator(inp_func inpf,
7094     asoc_func af,
7095     inp_func inpe,
7096     uint32_t pcb_state,
7097     uint32_t pcb_features,
7098     uint32_t asoc_state,
7099     void *argp,
7100     uint32_t argi,
7101     end_func ef,
7102     struct sctp_inpcb *s_inp,
7103     uint8_t chunk_output_off)
7104 {
7105         struct sctp_iterator *it = NULL;
7106
7107         if (af == NULL) {
7108                 return (-1);
7109         }
7110         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7111                 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7112                     SCTP_BASE_VAR(sctp_pcb_initialized));
7113                 return (-1);
7114         }
7115         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7116             SCTP_M_ITER);
7117         if (it == NULL) {
7118                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7119                 return (ENOMEM);
7120         }
7121         memset(it, 0, sizeof(*it));
7122         it->function_assoc = af;
7123         it->function_inp = inpf;
7124         if (inpf)
7125                 it->done_current_ep = 0;
7126         else
7127                 it->done_current_ep = 1;
7128         it->function_atend = ef;
7129         it->pointer = argp;
7130         it->val = argi;
7131         it->pcb_flags = pcb_state;
7132         it->pcb_features = pcb_features;
7133         it->asoc_state = asoc_state;
7134         it->function_inp_end = inpe;
7135         it->no_chunk_output = chunk_output_off;
7136         it->vn = curvnet;
7137         if (s_inp) {
7138                 /* Assume lock is held here */
7139                 it->inp = s_inp;
7140                 SCTP_INP_INCR_REF(it->inp);
7141                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7142         } else {
7143                 SCTP_INP_INFO_RLOCK();
7144                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7145                 if (it->inp) {
7146                         SCTP_INP_INCR_REF(it->inp);
7147                 }
7148                 SCTP_INP_INFO_RUNLOCK();
7149                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7150
7151         }
7152         SCTP_IPI_ITERATOR_WQ_LOCK();
7153         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7154                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7155                 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7156                     SCTP_BASE_VAR(sctp_pcb_initialized), it);
7157                 SCTP_FREE(it, SCTP_M_ITER);
7158                 return (-1);
7159         }
7160         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7161         if (sctp_it_ctl.iterator_running == 0) {
7162                 sctp_wakeup_iterator();
7163         }
7164         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7165         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7166         return (0);
7167 }