sys/netinet/sctp_pcb.c

   1 /*-
   2  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
   3  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
   4  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * a) Redistributions of source code must retain the above copyright notice,
  10  *    this list of conditions and the following disclaimer.
  11  *
  12  * b) Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the distribution.
  15  *
  16  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  30  * THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35
  36 #include <netinet/sctp_os.h>
  37 #include <sys/proc.h>
  38 #include <netinet/sctp_var.h>
  39 #include <netinet/sctp_sysctl.h>
  40 #include <netinet/sctp_pcb.h>
  41 #include <netinet/sctputil.h>
  42 #include <netinet/sctp.h>
  43 #include <netinet/sctp_header.h>
  44 #include <netinet/sctp_asconf.h>
  45 #include <netinet/sctp_output.h>
  46 #include <netinet/sctp_timer.h>
  47 #include <netinet/sctp_bsd_addr.h>
  48 #include <netinet/sctp_dtrace_define.h>
  49 #if defined(INET) || defined(INET6)
  50 #include <netinet/udp.h>
  51 #endif
  52 #ifdef INET6
  53 #include <netinet6/ip6_var.h>
  54 #endif
  55 #include <sys/sched.h>
  56 #include <sys/smp.h>
  57 #include <sys/unistd.h>
  58
  59
  60 VNET_DEFINE(struct sctp_base_info, system_base_info);
  61
  62 /* FIX: we don't handle multiple link local scopes */
  63 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  64 #ifdef INET6
  65 int
  66 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  67 {
  68         struct sockaddr_in6 tmp_a, tmp_b;
  69
  70         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  71         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  72                 return (0);
  73         }
  74         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  75         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  76                 return (0);
  77         }
  78         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  79 }
  80 #endif
  81
  82 void
  83 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  84 {
  85         /*
  86          * We really don't need to lock this, but I will just because it
  87          * does not hurt.
  88          */
  89         SCTP_INP_INFO_RLOCK();
  90         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  91         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  92         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  93         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  94         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  95         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  96         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  97         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
  98         SCTP_INP_INFO_RUNLOCK();
  99 }
 100
 101 /*-
 102  * Addresses are added to VRF's (Virtual Router's). For BSD we
 103  * have only the default VRF 0. We maintain a hash list of
 104  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
 105  * these has a list of addresses. When we add a new address
 106  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 107  * not exist we create it and add it to the list of IFN's
 108  * within the VRF. Once we have the sctp_ifn, we add the
 109  * address to the list. So we look something like:
 110  *
 111  * hash-vrf-table
 112  *   vrf-> ifn-> ifn -> ifn
 113  *   vrf    |
 114  *    ...   +--ifa-> ifa -> ifa
 115  *   vrf
 116  *
 117  * We keep these separate lists since the SCTP subsystem will
 118  * point to these from its source address selection nets structure.
 119  * When an address is deleted it does not happen right away on
 120  * the SCTP side, it gets scheduled. What we do when a
 121  * delete happens is immediately remove the address from
 122  * the master list and decrement the refcount. As our
 123  * addip iterator works through and frees the src address
 124  * selection pointing to the sctp_ifa, eventually the refcount
 125  * will reach 0 and we will delete it. Note that it is assumed
 126  * that any locking on system level ifn/ifa is done at the
 127  * caller of these functions and these routines will only
 128  * lock the SCTP structures as they add or delete things.
 129  *
 130  * Other notes on VRF concepts.
 131  *  - An endpoint can be in multiple VRF's
 132  *  - An association lives within a VRF and only one VRF.
 133  *  - Any incoming packet we can deduce the VRF for by
 134  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 135  *  - Any downward send call or connect call must supply the
 136  *    VRF via ancillary data or via some sort of set default
 137  *    VRF socket option call (again for BSD no brainer since
 138  *    the VRF is always 0).
 139  *  - An endpoint may add multiple VRF's to it.
 140  *  - Listening sockets can accept associations in any
 141  *    of the VRF's they are in but the assoc will end up
 142  *    in only one VRF (gotten from the packet or connect/send).
 143  *
 144  */
 145
 146 struct sctp_vrf *
 147 sctp_allocate_vrf(int vrf_id)
 148 {
 149         struct sctp_vrf *vrf = NULL;
 150         struct sctp_vrflist *bucket;
 151
 152         /* First allocate the VRF structure */
 153         vrf = sctp_find_vrf(vrf_id);
 154         if (vrf) {
 155                 /* Already allocated */
 156                 return (vrf);
 157         }
 158         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 159             SCTP_M_VRF);
 160         if (vrf == NULL) {
 161                 /* No memory */
 162 #ifdef INVARIANTS
 163                 panic("No memory for VRF:%d", vrf_id);
 164 #endif
 165                 return (NULL);
 166         }
 167         /* setup the VRF */
 168         memset(vrf, 0, sizeof(struct sctp_vrf));
 169         vrf->vrf_id = vrf_id;
 170         LIST_INIT(&vrf->ifnlist);
 171         vrf->total_ifa_count = 0;
 172         vrf->refcount = 0;
 173         /* now also setup table ids */
 174         SCTP_INIT_VRF_TABLEID(vrf);
 175         /* Init the HASH of addresses */
 176         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 177             &vrf->vrf_addr_hashmark);
 178         if (vrf->vrf_addr_hash == NULL) {
 179                 /* No memory */
 180 #ifdef INVARIANTS
 181                 panic("No memory for VRF:%d", vrf_id);
 182 #endif
 183                 SCTP_FREE(vrf, SCTP_M_VRF);
 184                 return (NULL);
 185         }
 186         /* Add it to the hash table */
 187         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 188         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 189         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 190         return (vrf);
 191 }
 192
 193
 194 struct sctp_ifn *
 195 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 196 {
 197         struct sctp_ifn *sctp_ifnp;
 198         struct sctp_ifnlist *hash_ifn_head;
 199
 200         /*
 201          * We assume the lock is held for the addresses if that's wrong
 202          * problems could occur :-)
 203          */
 204         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 205         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 206                 if (sctp_ifnp->ifn_index == ifn_index) {
 207                         return (sctp_ifnp);
 208                 }
 209                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 210                         return (sctp_ifnp);
 211                 }
 212         }
 213         return (NULL);
 214 }
 215
 216
 217 struct sctp_vrf *
 218 sctp_find_vrf(uint32_t vrf_id)
 219 {
 220         struct sctp_vrflist *bucket;
 221         struct sctp_vrf *liste;
 222
 223         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 224         LIST_FOREACH(liste, bucket, next_vrf) {
 225                 if (vrf_id == liste->vrf_id) {
 226                         return (liste);
 227                 }
 228         }
 229         return (NULL);
 230 }
 231
 232
 233 void
 234 sctp_free_vrf(struct sctp_vrf *vrf)
 235 {
 236         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 237                 if (vrf->vrf_addr_hash) {
 238                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 239                         vrf->vrf_addr_hash = NULL;
 240                 }
 241                 /* We zero'd the count */
 242                 LIST_REMOVE(vrf, next_vrf);
 243                 SCTP_FREE(vrf, SCTP_M_VRF);
 244                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 245         }
 246 }
 247
 248
 249 void
 250 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 251 {
 252         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 253                 /* We zero'd the count */
 254                 if (sctp_ifnp->vrf) {
 255                         sctp_free_vrf(sctp_ifnp->vrf);
 256                 }
 257                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 258                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 259         }
 260 }
 261
 262
 263 void
 264 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 265 {
 266         struct sctp_ifn *sctp_ifnp;
 267
 268         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 269         if (sctp_ifnp != NULL) {
 270                 sctp_ifnp->ifn_mtu = mtu;
 271         }
 272 }
 273
 274
 275 void
 276 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 277 {
 278         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 279                 /* We zero'd the count */
 280                 if (sctp_ifap->ifn_p) {
 281                         sctp_free_ifn(sctp_ifap->ifn_p);
 282                 }
 283                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 284                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 285         }
 286 }
 287
 288
 289 static void
 290 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 291 {
 292         struct sctp_ifn *found;
 293
 294         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 295         if (found == NULL) {
 296                 /* Not in the list.. sorry */
 297                 return;
 298         }
 299         if (hold_addr_lock == 0)
 300                 SCTP_IPI_ADDR_WLOCK();
 301         LIST_REMOVE(sctp_ifnp, next_bucket);
 302         LIST_REMOVE(sctp_ifnp, next_ifn);
 303         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 304             sctp_ifnp->registered_af);
 305         if (hold_addr_lock == 0)
 306                 SCTP_IPI_ADDR_WUNLOCK();
 307         /* Take away the reference, and possibly free it */
 308         sctp_free_ifn(sctp_ifnp);
 309 }
 310
 311
 312 void
 313 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 314     const char *if_name, uint32_t ifn_index)
 315 {
 316         struct sctp_vrf *vrf;
 317         struct sctp_ifa *sctp_ifap;
 318
 319         SCTP_IPI_ADDR_RLOCK();
 320         vrf = sctp_find_vrf(vrf_id);
 321         if (vrf == NULL) {
 322                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 323                 goto out;
 324
 325         }
 326         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 327         if (sctp_ifap == NULL) {
 328                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 329                 goto out;
 330         }
 331         if (sctp_ifap->ifn_p == NULL) {
 332                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
 333                 goto out;
 334         }
 335         if (if_name) {
 336                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 337                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 338                             sctp_ifap->ifn_p->ifn_name, if_name);
 339                         goto out;
 340                 }
 341         } else {
 342                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 343                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 344                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 345                         goto out;
 346                 }
 347         }
 348
 349         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 350         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 351 out:
 352         SCTP_IPI_ADDR_RUNLOCK();
 353 }
 354
 355
 356 void
 357 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 358     const char *if_name, uint32_t ifn_index)
 359 {
 360         struct sctp_vrf *vrf;
 361         struct sctp_ifa *sctp_ifap;
 362
 363         SCTP_IPI_ADDR_RLOCK();
 364         vrf = sctp_find_vrf(vrf_id);
 365         if (vrf == NULL) {
 366                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 367                 goto out;
 368
 369         }
 370         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 371         if (sctp_ifap == NULL) {
 372                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 373                 goto out;
 374         }
 375         if (sctp_ifap->ifn_p == NULL) {
 376                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
 377                 goto out;
 378         }
 379         if (if_name) {
 380                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 381                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 382                             sctp_ifap->ifn_p->ifn_name, if_name);
 383                         goto out;
 384                 }
 385         } else {
 386                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 387                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 388                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 389                         goto out;
 390                 }
 391         }
 392
 393         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 394         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 395 out:
 396         SCTP_IPI_ADDR_RUNLOCK();
 397 }
 398
 399
 400 /*-
 401  * Add an ifa to an ifn.
 402  * Register the interface as necessary.
 403  * NOTE: ADDR write lock MUST be held.
 404  */
 405 static void
 406 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 407 {
 408         int ifa_af;
 409
 410         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 411         sctp_ifap->ifn_p = sctp_ifnp;
 412         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 413         /* update address counts */
 414         sctp_ifnp->ifa_count++;
 415         ifa_af = sctp_ifap->address.sa.sa_family;
 416         switch (ifa_af) {
 417 #ifdef INET
 418         case AF_INET:
 419                 sctp_ifnp->num_v4++;
 420                 break;
 421 #endif
 422 #ifdef INET6
 423         case AF_INET6:
 424                 sctp_ifnp->num_v6++;
 425                 break;
 426 #endif
 427         default:
 428                 break;
 429         }
 430         if (sctp_ifnp->ifa_count == 1) {
 431                 /* register the new interface */
 432                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 433                 sctp_ifnp->registered_af = ifa_af;
 434         }
 435 }
 436
 437
 438 /*-
 439  * Remove an ifa from its ifn.
 440  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 441  * the interface based on the remaining address families left.
 442  * NOTE: ADDR write lock MUST be held.
 443  */
 444 static void
 445 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 446 {
 447         LIST_REMOVE(sctp_ifap, next_ifa);
 448         if (sctp_ifap->ifn_p) {
 449                 /* update address counts */
 450                 sctp_ifap->ifn_p->ifa_count--;
 451                 switch (sctp_ifap->address.sa.sa_family) {
 452 #ifdef INET
 453                 case AF_INET:
 454                         sctp_ifap->ifn_p->num_v4--;
 455                         break;
 456 #endif
 457 #ifdef INET6
 458                 case AF_INET6:
 459                         sctp_ifap->ifn_p->num_v6--;
 460                         break;
 461 #endif
 462                 default:
 463                         break;
 464                 }
 465
 466                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 467                         /* remove the ifn, possibly freeing it */
 468                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 469                 } else {
 470                         /* re-register address family type, if needed */
 471                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 472                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 473                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 474                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 475                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 476                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 477                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 478                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 479                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 480                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 481                         }
 482                         /* free the ifn refcount */
 483                         sctp_free_ifn(sctp_ifap->ifn_p);
 484                 }
 485                 sctp_ifap->ifn_p = NULL;
 486         }
 487 }
 488
 489
 490 struct sctp_ifa *
 491 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 492     uint32_t ifn_type, const char *if_name, void *ifa,
 493     struct sockaddr *addr, uint32_t ifa_flags,
 494     int dynamic_add)
 495 {
 496         struct sctp_vrf *vrf;
 497         struct sctp_ifn *sctp_ifnp = NULL;
 498         struct sctp_ifa *sctp_ifap = NULL;
 499         struct sctp_ifalist *hash_addr_head;
 500         struct sctp_ifnlist *hash_ifn_head;
 501         uint32_t hash_of_addr;
 502         int new_ifn_af = 0;
 503
 504 #ifdef SCTP_DEBUG
 505         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 506         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 507 #endif
 508         SCTP_IPI_ADDR_WLOCK();
 509         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 510         if (sctp_ifnp) {
 511                 vrf = sctp_ifnp->vrf;
 512         } else {
 513                 vrf = sctp_find_vrf(vrf_id);
 514                 if (vrf == NULL) {
 515                         vrf = sctp_allocate_vrf(vrf_id);
 516                         if (vrf == NULL) {
 517                                 SCTP_IPI_ADDR_WUNLOCK();
 518                                 return (NULL);
 519                         }
 520                 }
 521         }
 522         if (sctp_ifnp == NULL) {
 523                 /*
 524                  * build one and add it, can't hold lock until after malloc
 525                  * done though.
 526                  */
 527                 SCTP_IPI_ADDR_WUNLOCK();
 528                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 529                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 530                 if (sctp_ifnp == NULL) {
 531 #ifdef INVARIANTS
 532                         panic("No memory for IFN");
 533 #endif
 534                         return (NULL);
 535                 }
 536                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 537                 sctp_ifnp->ifn_index = ifn_index;
 538                 sctp_ifnp->ifn_p = ifn;
 539                 sctp_ifnp->ifn_type = ifn_type;
 540                 sctp_ifnp->refcount = 0;
 541                 sctp_ifnp->vrf = vrf;
 542                 atomic_add_int(&vrf->refcount, 1);
 543                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 544                 if (if_name != NULL) {
 545                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
 546                 } else {
 547                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
 548                 }
 549                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 550                 LIST_INIT(&sctp_ifnp->ifalist);
 551                 SCTP_IPI_ADDR_WLOCK();
 552                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 553                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 554                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 555                 new_ifn_af = 1;
 556         }
 557         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 558         if (sctp_ifap) {
 559                 /* Hmm, it already exists? */
 560                 if ((sctp_ifap->ifn_p) &&
 561                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 562                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 563                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 564                             (void *)sctp_ifap);
 565                         if (new_ifn_af) {
 566                                 /* Remove the created one that we don't want */
 567                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 568                         }
 569                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 570                                 /* easy to solve, just switch back to active */
 571                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 572                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 573                                 sctp_ifap->ifn_p = sctp_ifnp;
 574                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 575                         }
 576         exit_stage_left:
 577                         SCTP_IPI_ADDR_WUNLOCK();
 578                         return (sctp_ifap);
 579                 } else {
 580                         if (sctp_ifap->ifn_p) {
 581                                 /*
 582                                  * The last IFN gets the address, remove the
 583                                  * old one
 584                                  */
 585                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 586                                     (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 587                                     sctp_ifap->ifn_p->ifn_index, if_name,
 588                                     ifn_index);
 589                                 /* remove the address from the old ifn */
 590                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 591                                 /* move the address over to the new ifn */
 592                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 593                                 goto exit_stage_left;
 594                         } else {
 595                                 /* repair ifnp which was NULL ? */
 596                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 597                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 598                                     (void *)sctp_ifnp, (void *)sctp_ifap);
 599                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 600                         }
 601                         goto exit_stage_left;
 602                 }
 603         }
 604         SCTP_IPI_ADDR_WUNLOCK();
 605         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 606         if (sctp_ifap == NULL) {
 607 #ifdef INVARIANTS
 608                 panic("No memory for IFA");
 609 #endif
 610                 return (NULL);
 611         }
 612         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 613         sctp_ifap->ifn_p = sctp_ifnp;
 614         atomic_add_int(&sctp_ifnp->refcount, 1);
 615         sctp_ifap->vrf_id = vrf_id;
 616         sctp_ifap->ifa = ifa;
 617         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 618         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 619         sctp_ifap->flags = ifa_flags;
 620         /* Set scope */
 621         switch (sctp_ifap->address.sa.sa_family) {
 622 #ifdef INET
 623         case AF_INET:
 624                 {
 625                         struct sockaddr_in *sin;
 626
 627                         sin = &sctp_ifap->address.sin;
 628                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 629                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 630                                 sctp_ifap->src_is_loop = 1;
 631                         }
 632                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 633                                 sctp_ifap->src_is_priv = 1;
 634                         }
 635                         sctp_ifnp->num_v4++;
 636                         if (new_ifn_af)
 637                                 new_ifn_af = AF_INET;
 638                         break;
 639                 }
 640 #endif
 641 #ifdef INET6
 642         case AF_INET6:
 643                 {
 644                         /* ok to use deprecated addresses? */
 645                         struct sockaddr_in6 *sin6;
 646
 647                         sin6 = &sctp_ifap->address.sin6;
 648                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 649                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 650                                 sctp_ifap->src_is_loop = 1;
 651                         }
 652                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 653                                 sctp_ifap->src_is_priv = 1;
 654                         }
 655                         sctp_ifnp->num_v6++;
 656                         if (new_ifn_af)
 657                                 new_ifn_af = AF_INET6;
 658                         break;
 659                 }
 660 #endif
 661         default:
 662                 new_ifn_af = 0;
 663                 break;
 664         }
 665         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 666
 667         if ((sctp_ifap->src_is_priv == 0) &&
 668             (sctp_ifap->src_is_loop == 0)) {
 669                 sctp_ifap->src_is_glob = 1;
 670         }
 671         SCTP_IPI_ADDR_WLOCK();
 672         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 673         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 674         sctp_ifap->refcount = 1;
 675         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 676         sctp_ifnp->ifa_count++;
 677         vrf->total_ifa_count++;
 678         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 679         if (new_ifn_af) {
 680                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 681                 sctp_ifnp->registered_af = new_ifn_af;
 682         }
 683         SCTP_IPI_ADDR_WUNLOCK();
 684         if (dynamic_add) {
 685                 /*
 686                  * Bump up the refcount so that when the timer completes it
 687                  * will drop back down.
 688                  */
 689                 struct sctp_laddr *wi;
 690
 691                 atomic_add_int(&sctp_ifap->refcount, 1);
 692                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 693                 if (wi == NULL) {
 694                         /*
 695                          * Gak, what can we do? We have lost an address
 696                          * change can you say HOSED?
 697                          */
 698                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 699                         /* Opps, must decrement the count */
 700                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 701                             if_name);
 702                         return (NULL);
 703                 }
 704                 SCTP_INCR_LADDR_COUNT();
 705                 memset(wi, 0, sizeof(*wi));
 706                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 707                 wi->ifa = sctp_ifap;
 708                 wi->action = SCTP_ADD_IP_ADDRESS;
 709
 710                 SCTP_WQ_ADDR_LOCK();
 711                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 712                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 713                     (struct sctp_inpcb *)NULL,
 714                     (struct sctp_tcb *)NULL,
 715                     (struct sctp_nets *)NULL);
 716                 SCTP_WQ_ADDR_UNLOCK();
 717         } else {
 718                 /* it's ready for use */
 719                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 720         }
 721         return (sctp_ifap);
 722 }
 723
 724 void
 725 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 726     uint32_t ifn_index, const char *if_name)
 727 {
 728         struct sctp_vrf *vrf;
 729         struct sctp_ifa *sctp_ifap = NULL;
 730
 731         SCTP_IPI_ADDR_WLOCK();
 732         vrf = sctp_find_vrf(vrf_id);
 733         if (vrf == NULL) {
 734                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 735                 goto out_now;
 736         }
 737 #ifdef SCTP_DEBUG
 738         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 739         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 740 #endif
 741         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 742         if (sctp_ifap) {
 743                 /* Validate the delete */
 744                 if (sctp_ifap->ifn_p) {
 745                         int valid = 0;
 746
 747                         /*-
 748                          * The name has priority over the ifn_index
 749                          * if its given. We do this especially for
 750                          * panda who might recycle indexes fast.
 751                          */
 752                         if (if_name) {
 753                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 754                                         /* They match its a correct delete */
 755                                         valid = 1;
 756                                 }
 757                         }
 758                         if (!valid) {
 759                                 /* last ditch check ifn_index */
 760                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 761                                         valid = 1;
 762                                 }
 763                         }
 764                         if (!valid) {
 765                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 766                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 767                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 768                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 769                                 SCTP_IPI_ADDR_WUNLOCK();
 770                                 return;
 771                         }
 772                 }
 773                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
 774                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 775                 /*
 776                  * We don't set the flag. This means that the structure will
 777                  * hang around in EP's that have bound specific to it until
 778                  * they close. This gives us TCP like behavior if someone
 779                  * removes an address (or for that matter adds it right
 780                  * back).
 781                  */
 782                 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
 783                 vrf->total_ifa_count--;
 784                 LIST_REMOVE(sctp_ifap, next_bucket);
 785                 sctp_remove_ifa_from_ifn(sctp_ifap);
 786         }
 787 #ifdef SCTP_DEBUG
 788         else {
 789                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 790                     ifn_index);
 791                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 792         }
 793 #endif
 794
 795 out_now:
 796         SCTP_IPI_ADDR_WUNLOCK();
 797         if (sctp_ifap) {
 798                 struct sctp_laddr *wi;
 799
 800                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 801                 if (wi == NULL) {
 802                         /*
 803                          * Gak, what can we do? We have lost an address
 804                          * change can you say HOSED?
 805                          */
 806                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 807
 808                         /* Oops, must decrement the count */
 809                         sctp_free_ifa(sctp_ifap);
 810                         return;
 811                 }
 812                 SCTP_INCR_LADDR_COUNT();
 813                 memset(wi, 0, sizeof(*wi));
 814                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 815                 wi->ifa = sctp_ifap;
 816                 wi->action = SCTP_DEL_IP_ADDRESS;
 817                 SCTP_WQ_ADDR_LOCK();
 818                 /*
 819                  * Should this really be a tailq? As it is we will process
 820                  * the newest first :-0
 821                  */
 822                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 823                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 824                     (struct sctp_inpcb *)NULL,
 825                     (struct sctp_tcb *)NULL,
 826                     (struct sctp_nets *)NULL);
 827                 SCTP_WQ_ADDR_UNLOCK();
 828         }
 829         return;
 830 }
 831
 832
 833 static int
 834 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
 835 {
 836         int loopback_scope;
 837 #if defined(INET)
 838         int ipv4_local_scope, ipv4_addr_legal;
 839 #endif
 840 #if defined(INET6)
 841         int local_scope, site_scope, ipv6_addr_legal;
 842 #endif
 843         struct sctp_vrf *vrf;
 844         struct sctp_ifn *sctp_ifn;
 845         struct sctp_ifa *sctp_ifa;
 846
 847         loopback_scope = stcb->asoc.scope.loopback_scope;
 848 #if defined(INET)
 849         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
 850         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
 851 #endif
 852 #if defined(INET6)
 853         local_scope = stcb->asoc.scope.local_scope;
 854         site_scope = stcb->asoc.scope.site_scope;
 855         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
 856 #endif
 857
 858         SCTP_IPI_ADDR_RLOCK();
 859         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
 860         if (vrf == NULL) {
 861                 /* no vrf, no addresses */
 862                 SCTP_IPI_ADDR_RUNLOCK();
 863                 return (0);
 864         }
 865         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 866                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 867                         if ((loopback_scope == 0) &&
 868                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 869                                 continue;
 870                         }
 871                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 872                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
 873                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
 874                                         /*
 875                                          * We allow pending addresses, where
 876                                          * we have sent an asconf-add to be
 877                                          * considered valid.
 878                                          */
 879                                         continue;
 880                                 }
 881                                 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
 882                                         continue;
 883                                 }
 884                                 switch (sctp_ifa->address.sa.sa_family) {
 885 #ifdef INET
 886                                 case AF_INET:
 887                                         if (ipv4_addr_legal) {
 888                                                 struct sockaddr_in *sin,
 889                                                            *rsin;
 890
 891                                                 sin = &sctp_ifa->address.sin;
 892                                                 rsin = (struct sockaddr_in *)to;
 893                                                 if ((ipv4_local_scope == 0) &&
 894                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 895                                                         continue;
 896                                                 }
 897                                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
 898                                                     &sin->sin_addr) != 0) {
 899                                                         continue;
 900                                                 }
 901                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 902                                                         SCTP_IPI_ADDR_RUNLOCK();
 903                                                         return (1);
 904                                                 }
 905                                         }
 906                                         break;
 907 #endif
 908 #ifdef INET6
 909                                 case AF_INET6:
 910                                         if (ipv6_addr_legal) {
 911                                                 struct sockaddr_in6 *sin6,
 912                                                             *rsin6;
 913
 914                                                 sin6 = &sctp_ifa->address.sin6;
 915                                                 rsin6 = (struct sockaddr_in6 *)to;
 916                                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
 917                                                     &sin6->sin6_addr) != 0) {
 918                                                         continue;
 919                                                 }
 920                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 921                                                         if (local_scope == 0)
 922                                                                 continue;
 923                                                         if (sin6->sin6_scope_id == 0) {
 924                                                                 if (sa6_recoverscope(sin6) != 0)
 925                                                                         continue;
 926                                                         }
 927                                                 }
 928                                                 if ((site_scope == 0) &&
 929                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
 930                                                         continue;
 931                                                 }
 932                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 933                                                         SCTP_IPI_ADDR_RUNLOCK();
 934                                                         return (1);
 935                                                 }
 936                                         }
 937                                         break;
 938 #endif
 939                                 default:
 940                                         /* TSNH */
 941                                         break;
 942                                 }
 943                         }
 944                 }
 945         } else {
 946                 struct sctp_laddr *laddr;
 947
 948                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
 949                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 950                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 951                                 continue;
 952                         }
 953                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
 954                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
 955                                 /*
 956                                  * We allow pending addresses, where we have
 957                                  * sent an asconf-add to be considered
 958                                  * valid.
 959                                  */
 960                                 continue;
 961                         }
 962                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
 963                                 continue;
 964                         }
 965                         switch (to->sa_family) {
 966 #ifdef INET
 967                         case AF_INET:
 968                                 {
 969                                         struct sockaddr_in *sin, *rsin;
 970
 971                                         sin = &laddr->ifa->address.sin;
 972                                         rsin = (struct sockaddr_in *)to;
 973                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 974                                                 SCTP_IPI_ADDR_RUNLOCK();
 975                                                 return (1);
 976                                         }
 977                                         break;
 978                                 }
 979 #endif
 980 #ifdef INET6
 981                         case AF_INET6:
 982                                 {
 983                                         struct sockaddr_in6 *sin6, *rsin6;
 984
 985                                         sin6 = &laddr->ifa->address.sin6;
 986                                         rsin6 = (struct sockaddr_in6 *)to;
 987                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 988                                                 SCTP_IPI_ADDR_RUNLOCK();
 989                                                 return (1);
 990                                         }
 991                                         break;
 992                                 }
 993
 994 #endif
 995                         default:
 996                                 /* TSNH */
 997                                 break;
 998                         }
 999
1000                 }
1001         }
1002         SCTP_IPI_ADDR_RUNLOCK();
1003         return (0);
1004 }
1005
1006
1007 static struct sctp_tcb *
1008 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1009     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1010 {
1011         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1012         /*
1013          * If we support the TCP model, then we must now dig through to see
1014          * if we can find our endpoint in the list of tcp ep's.
1015          */
1016         uint16_t lport, rport;
1017         struct sctppcbhead *ephead;
1018         struct sctp_inpcb *inp;
1019         struct sctp_laddr *laddr;
1020         struct sctp_tcb *stcb;
1021         struct sctp_nets *net;
1022
1023         if ((to == NULL) || (from == NULL)) {
1024                 return (NULL);
1025         }
1026         switch (to->sa_family) {
1027 #ifdef INET
1028         case AF_INET:
1029                 if (from->sa_family == AF_INET) {
1030                         lport = ((struct sockaddr_in *)to)->sin_port;
1031                         rport = ((struct sockaddr_in *)from)->sin_port;
1032                 } else {
1033                         return (NULL);
1034                 }
1035                 break;
1036 #endif
1037 #ifdef INET6
1038         case AF_INET6:
1039                 if (from->sa_family == AF_INET6) {
1040                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
1041                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
1042                 } else {
1043                         return (NULL);
1044                 }
1045                 break;
1046 #endif
1047         default:
1048                 return (NULL);
1049         }
1050         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1051         /*
1052          * Ok now for each of the guys in this bucket we must look and see:
1053          * - Does the remote port match. - Does there single association's
1054          * addresses match this address (to). If so we update p_ep to point
1055          * to this ep and return the tcb from it.
1056          */
1057         LIST_FOREACH(inp, ephead, sctp_hash) {
1058                 SCTP_INP_RLOCK(inp);
1059                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1060                         SCTP_INP_RUNLOCK(inp);
1061                         continue;
1062                 }
1063                 if (lport != inp->sctp_lport) {
1064                         SCTP_INP_RUNLOCK(inp);
1065                         continue;
1066                 }
1067                 switch (to->sa_family) {
1068 #ifdef INET
1069                 case AF_INET:
1070                         {
1071                                 struct sockaddr_in *sin;
1072
1073                                 sin = (struct sockaddr_in *)to;
1074                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1075                                     &sin->sin_addr) != 0) {
1076                                         SCTP_INP_RUNLOCK(inp);
1077                                         continue;
1078                                 }
1079                                 break;
1080                         }
1081 #endif
1082 #ifdef INET6
1083                 case AF_INET6:
1084                         {
1085                                 struct sockaddr_in6 *sin6;
1086
1087                                 sin6 = (struct sockaddr_in6 *)to;
1088                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1089                                     &sin6->sin6_addr) != 0) {
1090                                         SCTP_INP_RUNLOCK(inp);
1091                                         continue;
1092                                 }
1093                                 break;
1094                         }
1095 #endif
1096                 default:
1097                         SCTP_INP_RUNLOCK(inp);
1098                         continue;
1099                 }
1100                 if (inp->def_vrf_id != vrf_id) {
1101                         SCTP_INP_RUNLOCK(inp);
1102                         continue;
1103                 }
1104                 /* check to see if the ep has one of the addresses */
1105                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1106                         /* We are NOT bound all, so look further */
1107                         int match = 0;
1108
1109                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1110
1111                                 if (laddr->ifa == NULL) {
1112                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__);
1113                                         continue;
1114                                 }
1115                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1116                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1117                                         continue;
1118                                 }
1119                                 if (laddr->ifa->address.sa.sa_family ==
1120                                     to->sa_family) {
1121                                         /* see if it matches */
1122 #ifdef INET
1123                                         if (from->sa_family == AF_INET) {
1124                                                 struct sockaddr_in *intf_addr,
1125                                                            *sin;
1126
1127                                                 intf_addr = &laddr->ifa->address.sin;
1128                                                 sin = (struct sockaddr_in *)to;
1129                                                 if (sin->sin_addr.s_addr ==
1130                                                     intf_addr->sin_addr.s_addr) {
1131                                                         match = 1;
1132                                                         break;
1133                                                 }
1134                                         }
1135 #endif
1136 #ifdef INET6
1137                                         if (from->sa_family == AF_INET6) {
1138                                                 struct sockaddr_in6 *intf_addr6;
1139                                                 struct sockaddr_in6 *sin6;
1140
1141                                                 sin6 = (struct sockaddr_in6 *)
1142                                                     to;
1143                                                 intf_addr6 = &laddr->ifa->address.sin6;
1144
1145                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1146                                                     intf_addr6)) {
1147                                                         match = 1;
1148                                                         break;
1149                                                 }
1150                                         }
1151 #endif
1152                                 }
1153                         }
1154                         if (match == 0) {
1155                                 /* This endpoint does not have this address */
1156                                 SCTP_INP_RUNLOCK(inp);
1157                                 continue;
1158                         }
1159                 }
1160                 /*
1161                  * Ok if we hit here the ep has the address, does it hold
1162                  * the tcb?
1163                  */
1164                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1165                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1166                 if (stcb == NULL) {
1167                         SCTP_INP_RUNLOCK(inp);
1168                         continue;
1169                 }
1170                 SCTP_TCB_LOCK(stcb);
1171                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1172                         SCTP_TCB_UNLOCK(stcb);
1173                         SCTP_INP_RUNLOCK(inp);
1174                         continue;
1175                 }
1176                 if (stcb->rport != rport) {
1177                         /* remote port does not match. */
1178                         SCTP_TCB_UNLOCK(stcb);
1179                         SCTP_INP_RUNLOCK(inp);
1180                         continue;
1181                 }
1182                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1183                         SCTP_TCB_UNLOCK(stcb);
1184                         SCTP_INP_RUNLOCK(inp);
1185                         continue;
1186                 }
1187                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1188                         SCTP_TCB_UNLOCK(stcb);
1189                         SCTP_INP_RUNLOCK(inp);
1190                         continue;
1191                 }
1192                 /* Does this TCB have a matching address? */
1193                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1194
1195                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1196                                 /* not the same family, can't be a match */
1197                                 continue;
1198                         }
1199                         switch (from->sa_family) {
1200 #ifdef INET
1201                         case AF_INET:
1202                                 {
1203                                         struct sockaddr_in *sin, *rsin;
1204
1205                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
1206                                         rsin = (struct sockaddr_in *)from;
1207                                         if (sin->sin_addr.s_addr ==
1208                                             rsin->sin_addr.s_addr) {
1209                                                 /* found it */
1210                                                 if (netp != NULL) {
1211                                                         *netp = net;
1212                                                 }
1213                                                 /*
1214                                                  * Update the endpoint
1215                                                  * pointer
1216                                                  */
1217                                                 *inp_p = inp;
1218                                                 SCTP_INP_RUNLOCK(inp);
1219                                                 return (stcb);
1220                                         }
1221                                         break;
1222                                 }
1223 #endif
1224 #ifdef INET6
1225                         case AF_INET6:
1226                                 {
1227                                         struct sockaddr_in6 *sin6, *rsin6;
1228
1229                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1230                                         rsin6 = (struct sockaddr_in6 *)from;
1231                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1232                                             rsin6)) {
1233                                                 /* found it */
1234                                                 if (netp != NULL) {
1235                                                         *netp = net;
1236                                                 }
1237                                                 /*
1238                                                  * Update the endpoint
1239                                                  * pointer
1240                                                  */
1241                                                 *inp_p = inp;
1242                                                 SCTP_INP_RUNLOCK(inp);
1243                                                 return (stcb);
1244                                         }
1245                                         break;
1246                                 }
1247 #endif
1248                         default:
1249                                 /* TSNH */
1250                                 break;
1251                         }
1252                 }
1253                 SCTP_TCB_UNLOCK(stcb);
1254                 SCTP_INP_RUNLOCK(inp);
1255         }
1256         return (NULL);
1257 }
1258
1259
1260 /*
1261  * rules for use
1262  *
1263  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1264  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1265  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1266  * NULL.
1267  */
1268
1269 struct sctp_tcb *
1270 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1271     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1272 {
1273         struct sctpasochead *head;
1274         struct sctp_inpcb *inp;
1275         struct sctp_tcb *stcb = NULL;
1276         struct sctp_nets *net;
1277         uint16_t rport;
1278
1279         inp = *inp_p;
1280         switch (remote->sa_family) {
1281 #ifdef INET
1282         case AF_INET:
1283                 rport = (((struct sockaddr_in *)remote)->sin_port);
1284                 break;
1285 #endif
1286 #ifdef INET6
1287         case AF_INET6:
1288                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1289                 break;
1290 #endif
1291         default:
1292                 return (NULL);
1293         }
1294         if (locked_tcb) {
1295                 /*
1296                  * UN-lock so we can do proper locking here this occurs when
1297                  * called from load_addresses_from_init.
1298                  */
1299                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1300                 SCTP_TCB_UNLOCK(locked_tcb);
1301         }
1302         SCTP_INP_INFO_RLOCK();
1303         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1304             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1305                 /*-
1306                  * Now either this guy is our listener or it's the
1307                  * connector. If it is the one that issued the connect, then
1308                  * it's only chance is to be the first TCB in the list. If
1309                  * it is the acceptor, then do the special_lookup to hash
1310                  * and find the real inp.
1311                  */
1312                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1313                         /* to is peer addr, from is my addr */
1314                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1315                             netp, inp->def_vrf_id);
1316                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1317                                 /* we have a locked tcb, lower refcount */
1318                                 SCTP_INP_DECR_REF(inp);
1319                         }
1320                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1321                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1322                                 SCTP_TCB_LOCK(locked_tcb);
1323                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1324                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1325                         }
1326                         SCTP_INP_INFO_RUNLOCK();
1327                         return (stcb);
1328                 } else {
1329                         SCTP_INP_WLOCK(inp);
1330                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1331                                 goto null_return;
1332                         }
1333                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1334                         if (stcb == NULL) {
1335                                 goto null_return;
1336                         }
1337                         SCTP_TCB_LOCK(stcb);
1338
1339                         if (stcb->rport != rport) {
1340                                 /* remote port does not match. */
1341                                 SCTP_TCB_UNLOCK(stcb);
1342                                 goto null_return;
1343                         }
1344                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1345                                 SCTP_TCB_UNLOCK(stcb);
1346                                 goto null_return;
1347                         }
1348                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1349                                 SCTP_TCB_UNLOCK(stcb);
1350                                 goto null_return;
1351                         }
1352                         /* now look at the list of remote addresses */
1353                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1354 #ifdef INVARIANTS
1355                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1356                                         panic("Corrupt net list");
1357                                 }
1358 #endif
1359                                 if (net->ro._l_addr.sa.sa_family !=
1360                                     remote->sa_family) {
1361                                         /* not the same family */
1362                                         continue;
1363                                 }
1364                                 switch (remote->sa_family) {
1365 #ifdef INET
1366                                 case AF_INET:
1367                                         {
1368                                                 struct sockaddr_in *sin,
1369                                                            *rsin;
1370
1371                                                 sin = (struct sockaddr_in *)
1372                                                     &net->ro._l_addr;
1373                                                 rsin = (struct sockaddr_in *)remote;
1374                                                 if (sin->sin_addr.s_addr ==
1375                                                     rsin->sin_addr.s_addr) {
1376                                                         /* found it */
1377                                                         if (netp != NULL) {
1378                                                                 *netp = net;
1379                                                         }
1380                                                         if (locked_tcb == NULL) {
1381                                                                 SCTP_INP_DECR_REF(inp);
1382                                                         } else if (locked_tcb != stcb) {
1383                                                                 SCTP_TCB_LOCK(locked_tcb);
1384                                                         }
1385                                                         if (locked_tcb) {
1386                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1387                                                         }
1388                                                         SCTP_INP_WUNLOCK(inp);
1389                                                         SCTP_INP_INFO_RUNLOCK();
1390                                                         return (stcb);
1391                                                 }
1392                                                 break;
1393                                         }
1394 #endif
1395 #ifdef INET6
1396                                 case AF_INET6:
1397                                         {
1398                                                 struct sockaddr_in6 *sin6,
1399                                                             *rsin6;
1400
1401                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1402                                                 rsin6 = (struct sockaddr_in6 *)remote;
1403                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1404                                                     rsin6)) {
1405                                                         /* found it */
1406                                                         if (netp != NULL) {
1407                                                                 *netp = net;
1408                                                         }
1409                                                         if (locked_tcb == NULL) {
1410                                                                 SCTP_INP_DECR_REF(inp);
1411                                                         } else if (locked_tcb != stcb) {
1412                                                                 SCTP_TCB_LOCK(locked_tcb);
1413                                                         }
1414                                                         if (locked_tcb) {
1415                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1416                                                         }
1417                                                         SCTP_INP_WUNLOCK(inp);
1418                                                         SCTP_INP_INFO_RUNLOCK();
1419                                                         return (stcb);
1420                                                 }
1421                                                 break;
1422                                         }
1423 #endif
1424                                 default:
1425                                         /* TSNH */
1426                                         break;
1427                                 }
1428                         }
1429                         SCTP_TCB_UNLOCK(stcb);
1430                 }
1431         } else {
1432                 SCTP_INP_WLOCK(inp);
1433                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1434                         goto null_return;
1435                 }
1436                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1437                     inp->sctp_hashmark)];
1438                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1439                         if (stcb->rport != rport) {
1440                                 /* remote port does not match */
1441                                 continue;
1442                         }
1443                         SCTP_TCB_LOCK(stcb);
1444                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1445                                 SCTP_TCB_UNLOCK(stcb);
1446                                 continue;
1447                         }
1448                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1449                                 SCTP_TCB_UNLOCK(stcb);
1450                                 continue;
1451                         }
1452                         /* now look at the list of remote addresses */
1453                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1454 #ifdef INVARIANTS
1455                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1456                                         panic("Corrupt net list");
1457                                 }
1458 #endif
1459                                 if (net->ro._l_addr.sa.sa_family !=
1460                                     remote->sa_family) {
1461                                         /* not the same family */
1462                                         continue;
1463                                 }
1464                                 switch (remote->sa_family) {
1465 #ifdef INET
1466                                 case AF_INET:
1467                                         {
1468                                                 struct sockaddr_in *sin,
1469                                                            *rsin;
1470
1471                                                 sin = (struct sockaddr_in *)
1472                                                     &net->ro._l_addr;
1473                                                 rsin = (struct sockaddr_in *)remote;
1474                                                 if (sin->sin_addr.s_addr ==
1475                                                     rsin->sin_addr.s_addr) {
1476                                                         /* found it */
1477                                                         if (netp != NULL) {
1478                                                                 *netp = net;
1479                                                         }
1480                                                         if (locked_tcb == NULL) {
1481                                                                 SCTP_INP_DECR_REF(inp);
1482                                                         } else if (locked_tcb != stcb) {
1483                                                                 SCTP_TCB_LOCK(locked_tcb);
1484                                                         }
1485                                                         if (locked_tcb) {
1486                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1487                                                         }
1488                                                         SCTP_INP_WUNLOCK(inp);
1489                                                         SCTP_INP_INFO_RUNLOCK();
1490                                                         return (stcb);
1491                                                 }
1492                                                 break;
1493                                         }
1494 #endif
1495 #ifdef INET6
1496                                 case AF_INET6:
1497                                         {
1498                                                 struct sockaddr_in6 *sin6,
1499                                                             *rsin6;
1500
1501                                                 sin6 = (struct sockaddr_in6 *)
1502                                                     &net->ro._l_addr;
1503                                                 rsin6 = (struct sockaddr_in6 *)remote;
1504                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1505                                                     rsin6)) {
1506                                                         /* found it */
1507                                                         if (netp != NULL) {
1508                                                                 *netp = net;
1509                                                         }
1510                                                         if (locked_tcb == NULL) {
1511                                                                 SCTP_INP_DECR_REF(inp);
1512                                                         } else if (locked_tcb != stcb) {
1513                                                                 SCTP_TCB_LOCK(locked_tcb);
1514                                                         }
1515                                                         if (locked_tcb) {
1516                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1517                                                         }
1518                                                         SCTP_INP_WUNLOCK(inp);
1519                                                         SCTP_INP_INFO_RUNLOCK();
1520                                                         return (stcb);
1521                                                 }
1522                                                 break;
1523                                         }
1524 #endif
1525                                 default:
1526                                         /* TSNH */
1527                                         break;
1528                                 }
1529                         }
1530                         SCTP_TCB_UNLOCK(stcb);
1531                 }
1532         }
1533 null_return:
1534         /* clean up for returning null */
1535         if (locked_tcb) {
1536                 SCTP_TCB_LOCK(locked_tcb);
1537                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1538         }
1539         SCTP_INP_WUNLOCK(inp);
1540         SCTP_INP_INFO_RUNLOCK();
1541         /* not found */
1542         return (NULL);
1543 }
1544
1545
1546 /*
1547  * Find an association for a specific endpoint using the association id given
1548  * out in the COMM_UP notification
1549  */
1550 struct sctp_tcb *
1551 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1552 {
1553         /*
1554          * Use my the assoc_id to find a endpoint
1555          */
1556         struct sctpasochead *head;
1557         struct sctp_tcb *stcb;
1558         uint32_t id;
1559
1560         if (inp == NULL) {
1561                 SCTP_PRINTF("TSNH ep_associd\n");
1562                 return (NULL);
1563         }
1564         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1565                 SCTP_PRINTF("TSNH ep_associd0\n");
1566                 return (NULL);
1567         }
1568         id = (uint32_t)asoc_id;
1569         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1570         if (head == NULL) {
1571                 /* invalid id TSNH */
1572                 SCTP_PRINTF("TSNH ep_associd1\n");
1573                 return (NULL);
1574         }
1575         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1576                 if (stcb->asoc.assoc_id == id) {
1577                         if (inp != stcb->sctp_ep) {
1578                                 /*
1579                                  * some other guy has the same id active (id
1580                                  * collision ??).
1581                                  */
1582                                 SCTP_PRINTF("TSNH ep_associd2\n");
1583                                 continue;
1584                         }
1585                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1586                                 continue;
1587                         }
1588                         if (want_lock) {
1589                                 SCTP_TCB_LOCK(stcb);
1590                         }
1591                         return (stcb);
1592                 }
1593         }
1594         return (NULL);
1595 }
1596
1597
1598 struct sctp_tcb *
1599 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1600 {
1601         struct sctp_tcb *stcb;
1602
1603         SCTP_INP_RLOCK(inp);
1604         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1605         SCTP_INP_RUNLOCK(inp);
1606         return (stcb);
1607 }
1608
1609
1610 /*
1611  * Endpoint probe expects that the INP_INFO is locked.
1612  */
1613 static struct sctp_inpcb *
1614 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1615     uint16_t lport, uint32_t vrf_id)
1616 {
1617         struct sctp_inpcb *inp;
1618         struct sctp_laddr *laddr;
1619 #ifdef INET
1620         struct sockaddr_in *sin;
1621 #endif
1622 #ifdef INET6
1623         struct sockaddr_in6 *sin6;
1624         struct sockaddr_in6 *intf_addr6;
1625 #endif
1626         int fnd;
1627
1628 #ifdef INET
1629         sin = NULL;
1630 #endif
1631 #ifdef INET6
1632         sin6 = NULL;
1633 #endif
1634         switch (nam->sa_family) {
1635 #ifdef INET
1636         case AF_INET:
1637                 sin = (struct sockaddr_in *)nam;
1638                 break;
1639 #endif
1640 #ifdef INET6
1641         case AF_INET6:
1642                 sin6 = (struct sockaddr_in6 *)nam;
1643                 break;
1644 #endif
1645         default:
1646                 /* unsupported family */
1647                 return (NULL);
1648         }
1649
1650         if (head == NULL)
1651                 return (NULL);
1652
1653         LIST_FOREACH(inp, head, sctp_hash) {
1654                 SCTP_INP_RLOCK(inp);
1655                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1656                         SCTP_INP_RUNLOCK(inp);
1657                         continue;
1658                 }
1659                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1660                     (inp->sctp_lport == lport)) {
1661                         /* got it */
1662                         switch (nam->sa_family) {
1663 #ifdef INET
1664                         case AF_INET:
1665                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1666                                     SCTP_IPV6_V6ONLY(inp)) {
1667                                         /*
1668                                          * IPv4 on a IPv6 socket with ONLY
1669                                          * IPv6 set
1670                                          */
1671                                         SCTP_INP_RUNLOCK(inp);
1672                                         continue;
1673                                 }
1674                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1675                                     &sin->sin_addr) != 0) {
1676                                         SCTP_INP_RUNLOCK(inp);
1677                                         continue;
1678                                 }
1679                                 break;
1680 #endif
1681 #ifdef INET6
1682                         case AF_INET6:
1683                                 /*
1684                                  * A V6 address and the endpoint is NOT
1685                                  * bound V6
1686                                  */
1687                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1688                                         SCTP_INP_RUNLOCK(inp);
1689                                         continue;
1690                                 }
1691                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1692                                     &sin6->sin6_addr) != 0) {
1693                                         SCTP_INP_RUNLOCK(inp);
1694                                         continue;
1695                                 }
1696                                 break;
1697 #endif
1698                         default:
1699                                 break;
1700                         }
1701                         /* does a VRF id match? */
1702                         fnd = 0;
1703                         if (inp->def_vrf_id == vrf_id)
1704                                 fnd = 1;
1705
1706                         SCTP_INP_RUNLOCK(inp);
1707                         if (!fnd)
1708                                 continue;
1709                         return (inp);
1710                 }
1711                 SCTP_INP_RUNLOCK(inp);
1712         }
1713         switch (nam->sa_family) {
1714 #ifdef INET
1715         case AF_INET:
1716                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1717                         /* Can't hunt for one that has no address specified */
1718                         return (NULL);
1719                 }
1720                 break;
1721 #endif
1722 #ifdef INET6
1723         case AF_INET6:
1724                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1725                         /* Can't hunt for one that has no address specified */
1726                         return (NULL);
1727                 }
1728                 break;
1729 #endif
1730         default:
1731                 break;
1732         }
1733         /*
1734          * ok, not bound to all so see if we can find a EP bound to this
1735          * address.
1736          */
1737         LIST_FOREACH(inp, head, sctp_hash) {
1738                 SCTP_INP_RLOCK(inp);
1739                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1740                         SCTP_INP_RUNLOCK(inp);
1741                         continue;
1742                 }
1743                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1744                         SCTP_INP_RUNLOCK(inp);
1745                         continue;
1746                 }
1747                 /*
1748                  * Ok this could be a likely candidate, look at all of its
1749                  * addresses
1750                  */
1751                 if (inp->sctp_lport != lport) {
1752                         SCTP_INP_RUNLOCK(inp);
1753                         continue;
1754                 }
1755                 /* does a VRF id match? */
1756                 fnd = 0;
1757                 if (inp->def_vrf_id == vrf_id)
1758                         fnd = 1;
1759
1760                 if (!fnd) {
1761                         SCTP_INP_RUNLOCK(inp);
1762                         continue;
1763                 }
1764                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1765                         if (laddr->ifa == NULL) {
1766                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1767                                     __func__);
1768                                 continue;
1769                         }
1770                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1771                             (void *)laddr->ifa);
1772                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1773                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1774                                 continue;
1775                         }
1776                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1777                                 /* possible, see if it matches */
1778                                 switch (nam->sa_family) {
1779 #ifdef INET
1780                                 case AF_INET:
1781                                         if (sin->sin_addr.s_addr ==
1782                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1783                                                 SCTP_INP_RUNLOCK(inp);
1784                                                 return (inp);
1785                                         }
1786                                         break;
1787 #endif
1788 #ifdef INET6
1789                                 case AF_INET6:
1790                                         intf_addr6 = &laddr->ifa->address.sin6;
1791                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1792                                             intf_addr6)) {
1793                                                 SCTP_INP_RUNLOCK(inp);
1794                                                 return (inp);
1795                                         }
1796                                         break;
1797 #endif
1798                                 }
1799                         }
1800                 }
1801                 SCTP_INP_RUNLOCK(inp);
1802         }
1803         return (NULL);
1804 }
1805
1806
1807 static struct sctp_inpcb *
1808 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1809 {
1810         struct sctppcbhead *head;
1811         struct sctp_inpcb *t_inp;
1812         int fnd;
1813
1814         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1815             SCTP_BASE_INFO(hashmark))];
1816         LIST_FOREACH(t_inp, head, sctp_hash) {
1817                 if (t_inp->sctp_lport != lport) {
1818                         continue;
1819                 }
1820                 /* is it in the VRF in question */
1821                 fnd = 0;
1822                 if (t_inp->def_vrf_id == vrf_id)
1823                         fnd = 1;
1824                 if (!fnd)
1825                         continue;
1826
1827                 /* This one is in use. */
1828                 /* check the v6/v4 binding issue */
1829                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1830                     SCTP_IPV6_V6ONLY(t_inp)) {
1831                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1832                                 /* collision in V6 space */
1833                                 return (t_inp);
1834                         } else {
1835                                 /* inp is BOUND_V4 no conflict */
1836                                 continue;
1837                         }
1838                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1839                         /* t_inp is bound v4 and v6, conflict always */
1840                         return (t_inp);
1841                 } else {
1842                         /* t_inp is bound only V4 */
1843                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1844                             SCTP_IPV6_V6ONLY(inp)) {
1845                                 /* no conflict */
1846                                 continue;
1847                         }
1848                         /* else fall through to conflict */
1849                 }
1850                 return (t_inp);
1851         }
1852         return (NULL);
1853 }
1854
1855
1856 int
1857 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1858 {
1859         /* For 1-2-1 with port reuse */
1860         struct sctppcbhead *head;
1861         struct sctp_inpcb *tinp, *ninp;
1862
1863         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1864                 /* only works with port reuse on */
1865                 return (-1);
1866         }
1867         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1868                 return (0);
1869         }
1870         SCTP_INP_RUNLOCK(inp);
1871         SCTP_INP_INFO_WLOCK();
1872         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1873             SCTP_BASE_INFO(hashmark))];
1874         /* Kick out all non-listeners to the TCP hash */
1875         LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1876                 if (tinp->sctp_lport != inp->sctp_lport) {
1877                         continue;
1878                 }
1879                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1880                         continue;
1881                 }
1882                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1883                         continue;
1884                 }
1885                 if (tinp->sctp_socket->so_qlimit) {
1886                         continue;
1887                 }
1888                 SCTP_INP_WLOCK(tinp);
1889                 LIST_REMOVE(tinp, sctp_hash);
1890                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1891                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1892                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1893                 SCTP_INP_WUNLOCK(tinp);
1894         }
1895         SCTP_INP_WLOCK(inp);
1896         /* Pull from where he was */
1897         LIST_REMOVE(inp, sctp_hash);
1898         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1899         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1900         LIST_INSERT_HEAD(head, inp, sctp_hash);
1901         SCTP_INP_WUNLOCK(inp);
1902         SCTP_INP_RLOCK(inp);
1903         SCTP_INP_INFO_WUNLOCK();
1904         return (0);
1905 }
1906
1907
1908 struct sctp_inpcb *
1909 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1910     uint32_t vrf_id)
1911 {
1912         /*
1913          * First we check the hash table to see if someone has this port
1914          * bound with just the port.
1915          */
1916         struct sctp_inpcb *inp;
1917         struct sctppcbhead *head;
1918         int lport;
1919         unsigned int i;
1920 #ifdef INET
1921         struct sockaddr_in *sin;
1922 #endif
1923 #ifdef INET6
1924         struct sockaddr_in6 *sin6;
1925 #endif
1926
1927         switch (nam->sa_family) {
1928 #ifdef INET
1929         case AF_INET:
1930                 sin = (struct sockaddr_in *)nam;
1931                 lport = sin->sin_port;
1932                 break;
1933 #endif
1934 #ifdef INET6
1935         case AF_INET6:
1936                 sin6 = (struct sockaddr_in6 *)nam;
1937                 lport = sin6->sin6_port;
1938                 break;
1939 #endif
1940         default:
1941                 return (NULL);
1942         }
1943         /*
1944          * I could cheat here and just cast to one of the types but we will
1945          * do it right. It also provides the check against an Unsupported
1946          * type too.
1947          */
1948         /* Find the head of the ALLADDR chain */
1949         if (have_lock == 0) {
1950                 SCTP_INP_INFO_RLOCK();
1951         }
1952         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1953             SCTP_BASE_INFO(hashmark))];
1954         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1955
1956         /*
1957          * If the TCP model exists it could be that the main listening
1958          * endpoint is gone but there still exists a connected socket for
1959          * this guy. If so we can return the first one that we find. This
1960          * may NOT be the correct one so the caller should be wary on the
1961          * returned INP. Currently the only caller that sets find_tcp_pool
1962          * is in bindx where we are verifying that a user CAN bind the
1963          * address. He either has bound it already, or someone else has, or
1964          * its open to bind, so this is good enough.
1965          */
1966         if (inp == NULL && find_tcp_pool) {
1967                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1968                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1969                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1970                         if (inp) {
1971                                 break;
1972                         }
1973                 }
1974         }
1975         if (inp) {
1976                 SCTP_INP_INCR_REF(inp);
1977         }
1978         if (have_lock == 0) {
1979                 SCTP_INP_INFO_RUNLOCK();
1980         }
1981         return (inp);
1982 }
1983
1984
1985 /*
1986  * Find an association for an endpoint with the pointer to whom you want to
1987  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1988  * need to change the *to to some other struct like a mbuf...
1989  */
1990 struct sctp_tcb *
1991 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
1992     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1993     uint32_t vrf_id)
1994 {
1995         struct sctp_inpcb *inp = NULL;
1996         struct sctp_tcb *stcb;
1997
1998         SCTP_INP_INFO_RLOCK();
1999         if (find_tcp_pool) {
2000                 if (inp_p != NULL) {
2001                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2002                             vrf_id);
2003                 } else {
2004                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2005                             vrf_id);
2006                 }
2007                 if (stcb != NULL) {
2008                         SCTP_INP_INFO_RUNLOCK();
2009                         return (stcb);
2010                 }
2011         }
2012         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2013         if (inp_p != NULL) {
2014                 *inp_p = inp;
2015         }
2016         SCTP_INP_INFO_RUNLOCK();
2017         if (inp == NULL) {
2018                 return (NULL);
2019         }
2020         /*
2021          * ok, we have an endpoint, now lets find the assoc for it (if any)
2022          * we now place the source address or from in the to of the find
2023          * endpoint call. Since in reality this chain is used from the
2024          * inbound packet side.
2025          */
2026         if (inp_p != NULL) {
2027                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2028                     NULL);
2029         } else {
2030                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2031                     NULL);
2032         }
2033         return (stcb);
2034 }
2035
2036
2037 /*
2038  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2039  * find all addresses that the sender has specified in any address list. Each
2040  * address will be used to lookup the TCB and see if one exits.
2041  */
2042 static struct sctp_tcb *
2043 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2044     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2045     struct sockaddr *dst)
2046 {
2047         struct sctp_paramhdr *phdr, param_buf;
2048 #if defined(INET) || defined(INET6)
2049         struct sctp_tcb *stcb;
2050         uint16_t ptype;
2051 #endif
2052         uint16_t plen;
2053 #ifdef INET
2054         struct sockaddr_in sin4;
2055 #endif
2056 #ifdef INET6
2057         struct sockaddr_in6 sin6;
2058 #endif
2059
2060 #ifdef INET
2061         memset(&sin4, 0, sizeof(sin4));
2062         sin4.sin_len = sizeof(sin4);
2063         sin4.sin_family = AF_INET;
2064         sin4.sin_port = sh->src_port;
2065 #endif
2066 #ifdef INET6
2067         memset(&sin6, 0, sizeof(sin6));
2068         sin6.sin6_len = sizeof(sin6);
2069         sin6.sin6_family = AF_INET6;
2070         sin6.sin6_port = sh->src_port;
2071 #endif
2072
2073         offset += sizeof(struct sctp_init_chunk);
2074
2075         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
2076         while (phdr != NULL) {
2077                 /* now we must see if we want the parameter */
2078 #if defined(INET) || defined(INET6)
2079                 ptype = ntohs(phdr->param_type);
2080 #endif
2081                 plen = ntohs(phdr->param_length);
2082                 if (plen == 0) {
2083                         break;
2084                 }
2085 #ifdef INET
2086                 if (ptype == SCTP_IPV4_ADDRESS &&
2087                     plen == sizeof(struct sctp_ipv4addr_param)) {
2088                         /* Get the rest of the address */
2089                         struct sctp_ipv4addr_param ip4_param, *p4;
2090
2091                         phdr = sctp_get_next_param(m, offset,
2092                             (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param));
2093                         if (phdr == NULL) {
2094                                 return (NULL);
2095                         }
2096                         p4 = (struct sctp_ipv4addr_param *)phdr;
2097                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2098                         /* look it up */
2099                         stcb = sctp_findassociation_ep_addr(inp_p,
2100                             (struct sockaddr *)&sin4, netp, dst, NULL);
2101                         if (stcb != NULL) {
2102                                 return (stcb);
2103                         }
2104                 }
2105 #endif
2106 #ifdef INET6
2107                 if (ptype == SCTP_IPV6_ADDRESS &&
2108                     plen == sizeof(struct sctp_ipv6addr_param)) {
2109                         /* Get the rest of the address */
2110                         struct sctp_ipv6addr_param ip6_param, *p6;
2111
2112                         phdr = sctp_get_next_param(m, offset,
2113                             (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param));
2114                         if (phdr == NULL) {
2115                                 return (NULL);
2116                         }
2117                         p6 = (struct sctp_ipv6addr_param *)phdr;
2118                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2119                         /* look it up */
2120                         stcb = sctp_findassociation_ep_addr(inp_p,
2121                             (struct sockaddr *)&sin6, netp, dst, NULL);
2122                         if (stcb != NULL) {
2123                                 return (stcb);
2124                         }
2125                 }
2126 #endif
2127                 offset += SCTP_SIZE32(plen);
2128                 phdr = sctp_get_next_param(m, offset, &param_buf,
2129                     sizeof(param_buf));
2130         }
2131         return (NULL);
2132 }
2133
2134 static struct sctp_tcb *
2135 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2136     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2137     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2138 {
2139         /*
2140          * Use my vtag to hash. If we find it we then verify the source addr
2141          * is in the assoc. If all goes well we save a bit on rec of a
2142          * packet.
2143          */
2144         struct sctpasochead *head;
2145         struct sctp_nets *net;
2146         struct sctp_tcb *stcb;
2147
2148         SCTP_INP_INFO_RLOCK();
2149         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2150             SCTP_BASE_INFO(hashasocmark))];
2151         LIST_FOREACH(stcb, head, sctp_asocs) {
2152                 SCTP_INP_RLOCK(stcb->sctp_ep);
2153                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2154                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2155                         continue;
2156                 }
2157                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2158                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2159                         continue;
2160                 }
2161                 SCTP_TCB_LOCK(stcb);
2162                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2163                 if (stcb->asoc.my_vtag == vtag) {
2164                         /* candidate */
2165                         if (stcb->rport != rport) {
2166                                 SCTP_TCB_UNLOCK(stcb);
2167                                 continue;
2168                         }
2169                         if (stcb->sctp_ep->sctp_lport != lport) {
2170                                 SCTP_TCB_UNLOCK(stcb);
2171                                 continue;
2172                         }
2173                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2174                                 SCTP_TCB_UNLOCK(stcb);
2175                                 continue;
2176                         }
2177                         /* RRS:Need toaddr check here */
2178                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2179                                 /* Endpoint does not own this address */
2180                                 SCTP_TCB_UNLOCK(stcb);
2181                                 continue;
2182                         }
2183                         if (remote_tag) {
2184                                 /*
2185                                  * If we have both vtags that's all we match
2186                                  * on
2187                                  */
2188                                 if (stcb->asoc.peer_vtag == remote_tag) {
2189                                         /*
2190                                          * If both tags match we consider it
2191                                          * conclusive and check NO
2192                                          * source/destination addresses
2193                                          */
2194                                         goto conclusive;
2195                                 }
2196                         }
2197                         if (skip_src_check) {
2198                 conclusive:
2199                                 if (from) {
2200                                         *netp = sctp_findnet(stcb, from);
2201                                 } else {
2202                                         *netp = NULL;   /* unknown */
2203                                 }
2204                                 if (inp_p)
2205                                         *inp_p = stcb->sctp_ep;
2206                                 SCTP_INP_INFO_RUNLOCK();
2207                                 return (stcb);
2208                         }
2209                         net = sctp_findnet(stcb, from);
2210                         if (net) {
2211                                 /* yep its him. */
2212                                 *netp = net;
2213                                 SCTP_STAT_INCR(sctps_vtagexpress);
2214                                 *inp_p = stcb->sctp_ep;
2215                                 SCTP_INP_INFO_RUNLOCK();
2216                                 return (stcb);
2217                         } else {
2218                                 /*
2219                                  * not him, this should only happen in rare
2220                                  * cases so I peg it.
2221                                  */
2222                                 SCTP_STAT_INCR(sctps_vtagbogus);
2223                         }
2224                 }
2225                 SCTP_TCB_UNLOCK(stcb);
2226         }
2227         SCTP_INP_INFO_RUNLOCK();
2228         return (NULL);
2229 }
2230
2231
2232 /*
2233  * Find an association with the pointer to the inbound IP packet. This can be
2234  * a IPv4 or IPv6 packet.
2235  */
2236 struct sctp_tcb *
2237 sctp_findassociation_addr(struct mbuf *m, int offset,
2238     struct sockaddr *src, struct sockaddr *dst,
2239     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2240     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2241 {
2242         struct sctp_tcb *stcb;
2243         struct sctp_inpcb *inp;
2244
2245         if (sh->v_tag) {
2246                 /* we only go down this path if vtag is non-zero */
2247                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2248                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2249                 if (stcb) {
2250                         return (stcb);
2251                 }
2252         }
2253         if (inp_p) {
2254                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2255                     1, vrf_id);
2256                 inp = *inp_p;
2257         } else {
2258                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2259                     1, vrf_id);
2260         }
2261         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2262         if (stcb == NULL && inp) {
2263                 /* Found a EP but not this address */
2264                 if ((ch->chunk_type == SCTP_INITIATION) ||
2265                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2266                         /*-
2267                          * special hook, we do NOT return linp or an
2268                          * association that is linked to an existing
2269                          * association that is under the TCP pool (i.e. no
2270                          * listener exists). The endpoint finding routine
2271                          * will always find a listener before examining the
2272                          * TCP pool.
2273                          */
2274                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2275                                 if (inp_p) {
2276                                         *inp_p = NULL;
2277                                 }
2278                                 return (NULL);
2279                         }
2280                         stcb = sctp_findassociation_special_addr(m,
2281                             offset, sh, &inp, netp, dst);
2282                         if (inp_p != NULL) {
2283                                 *inp_p = inp;
2284                         }
2285                 }
2286         }
2287         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2288         return (stcb);
2289 }
2290
2291 /*
2292  * lookup an association by an ASCONF lookup address.
2293  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2294  */
2295 struct sctp_tcb *
2296 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2297     struct sockaddr *dst, struct sctphdr *sh,
2298     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2299 {
2300         struct sctp_tcb *stcb;
2301         union sctp_sockstore remote_store;
2302         struct sctp_paramhdr param_buf, *phdr;
2303         int ptype;
2304         int zero_address = 0;
2305 #ifdef INET
2306         struct sockaddr_in *sin;
2307 #endif
2308 #ifdef INET6
2309         struct sockaddr_in6 *sin6;
2310 #endif
2311
2312         memset(&remote_store, 0, sizeof(remote_store));
2313         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2314             &param_buf, sizeof(struct sctp_paramhdr));
2315         if (phdr == NULL) {
2316                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2317                     __func__);
2318                 return NULL;
2319         }
2320         ptype = (int)((uint32_t)ntohs(phdr->param_type));
2321         /* get the correlation address */
2322         switch (ptype) {
2323 #ifdef INET6
2324         case SCTP_IPV6_ADDRESS:
2325                 {
2326                         /* ipv6 address param */
2327                         struct sctp_ipv6addr_param *p6, p6_buf;
2328
2329                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2330                                 return NULL;
2331                         }
2332                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2333                             offset + sizeof(struct sctp_asconf_chunk),
2334                             &p6_buf.ph, sizeof(p6_buf));
2335                         if (p6 == NULL) {
2336                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2337                                     __func__);
2338                                 return (NULL);
2339                         }
2340                         sin6 = &remote_store.sin6;
2341                         sin6->sin6_family = AF_INET6;
2342                         sin6->sin6_len = sizeof(*sin6);
2343                         sin6->sin6_port = sh->src_port;
2344                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2345                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2346                                 zero_address = 1;
2347                         break;
2348                 }
2349 #endif
2350 #ifdef INET
2351         case SCTP_IPV4_ADDRESS:
2352                 {
2353                         /* ipv4 address param */
2354                         struct sctp_ipv4addr_param *p4, p4_buf;
2355
2356                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2357                                 return NULL;
2358                         }
2359                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2360                             offset + sizeof(struct sctp_asconf_chunk),
2361                             &p4_buf.ph, sizeof(p4_buf));
2362                         if (p4 == NULL) {
2363                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2364                                     __func__);
2365                                 return (NULL);
2366                         }
2367                         sin = &remote_store.sin;
2368                         sin->sin_family = AF_INET;
2369                         sin->sin_len = sizeof(*sin);
2370                         sin->sin_port = sh->src_port;
2371                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2372                         if (sin->sin_addr.s_addr == INADDR_ANY)
2373                                 zero_address = 1;
2374                         break;
2375                 }
2376 #endif
2377         default:
2378                 /* invalid address param type */
2379                 return NULL;
2380         }
2381
2382         if (zero_address) {
2383                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2384                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2385                 if (stcb != NULL) {
2386                         SCTP_INP_DECR_REF(*inp_p);
2387                 }
2388         } else {
2389                 stcb = sctp_findassociation_ep_addr(inp_p,
2390                     &remote_store.sa, netp,
2391                     dst, NULL);
2392         }
2393         return (stcb);
2394 }
2395
2396
2397 /*
2398  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2399  * addresses. This way if we don't get a bind we by default pick a ephemeral
2400  * port with all addresses bound.
2401  */
2402 int
2403 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2404 {
2405         /*
2406          * we get called when a new endpoint starts up. We need to allocate
2407          * the sctp_inpcb structure from the zone and init it. Mark it as
2408          * unbound and find a port that we can use as an ephemeral with
2409          * INADDR_ANY. If the user binds later no problem we can then add in
2410          * the specific addresses. And setup the default parameters for the
2411          * EP.
2412          */
2413         int i, error;
2414         struct sctp_inpcb *inp;
2415         struct sctp_pcb *m;
2416         struct timeval time;
2417         sctp_sharedkey_t *null_key;
2418
2419         error = 0;
2420
2421         SCTP_INP_INFO_WLOCK();
2422         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2423         if (inp == NULL) {
2424                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2425                 SCTP_INP_INFO_WUNLOCK();
2426                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2427                 return (ENOBUFS);
2428         }
2429         /* zap it */
2430         memset(inp, 0, sizeof(*inp));
2431
2432         /* bump generations */
2433         /* setup socket pointers */
2434         inp->sctp_socket = so;
2435         inp->ip_inp.inp.inp_socket = so;
2436         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2437 #ifdef INET6
2438         if (INP_SOCKAF(so) == AF_INET6) {
2439                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2440                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2441                 }
2442                 if (MODULE_GLOBAL(ip6_v6only)) {
2443                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2444                 }
2445         }
2446 #endif
2447         inp->sctp_associd_counter = 1;
2448         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2449         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2450         inp->max_cwnd = 0;
2451         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2452         inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable);
2453         inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable);
2454         inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable);
2455         inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable);
2456         inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2457         inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2458         inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2459         inp->idata_supported = 0;
2460
2461         inp->fibnum = so->so_fibnum;
2462         /* init the small hash table we use to track asocid <-> tcb */
2463         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2464         if (inp->sctp_asocidhash == NULL) {
2465                 crfree(inp->ip_inp.inp.inp_cred);
2466                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2467                 SCTP_INP_INFO_WUNLOCK();
2468                 return (ENOBUFS);
2469         }
2470         SCTP_INCR_EP_COUNT();
2471         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2472         SCTP_INP_INFO_WUNLOCK();
2473
2474         so->so_pcb = (caddr_t)inp;
2475
2476         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2477                 /* UDP style socket */
2478                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2479                     SCTP_PCB_FLAGS_UNBOUND);
2480                 /* Be sure it is NON-BLOCKING IO for UDP */
2481                 /* SCTP_SET_SO_NBIO(so); */
2482         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2483                 /* TCP style socket */
2484                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2485                     SCTP_PCB_FLAGS_UNBOUND);
2486                 /* Be sure we have blocking IO by default */
2487                 SOCK_LOCK(so);
2488                 SCTP_CLEAR_SO_NBIO(so);
2489                 SOCK_UNLOCK(so);
2490         } else {
2491                 /*
2492                  * unsupported socket type (RAW, etc)- in case we missed it
2493                  * in protosw
2494                  */
2495                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2496                 so->so_pcb = NULL;
2497                 crfree(inp->ip_inp.inp.inp_cred);
2498                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2499                 return (EOPNOTSUPP);
2500         }
2501         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2502                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2503                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2504         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2505                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2506                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2507         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2508                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2509                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2510         }
2511         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2512             &inp->sctp_hashmark);
2513         if (inp->sctp_tcbhash == NULL) {
2514                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2515                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2516                 so->so_pcb = NULL;
2517                 crfree(inp->ip_inp.inp.inp_cred);
2518                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2519                 return (ENOBUFS);
2520         }
2521         inp->def_vrf_id = vrf_id;
2522
2523         SCTP_INP_INFO_WLOCK();
2524         SCTP_INP_LOCK_INIT(inp);
2525         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2526         SCTP_INP_READ_INIT(inp);
2527         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2528         /* lock the new ep */
2529         SCTP_INP_WLOCK(inp);
2530
2531         /* add it to the info area */
2532         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2533         SCTP_INP_INFO_WUNLOCK();
2534
2535         TAILQ_INIT(&inp->read_queue);
2536         LIST_INIT(&inp->sctp_addr_list);
2537
2538         LIST_INIT(&inp->sctp_asoc_list);
2539
2540 #ifdef SCTP_TRACK_FREED_ASOCS
2541         /* TEMP CODE */
2542         LIST_INIT(&inp->sctp_asoc_free_list);
2543 #endif
2544         /* Init the timer structure for signature change */
2545         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2546         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2547
2548         /* now init the actual endpoint default data */
2549         m = &inp->sctp_ep;
2550
2551         /* setup the base timeout information */
2552         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2553         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2554         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2555         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2556         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2557         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2558         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2559         /* all max/min max are in ms */
2560         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2561         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2562         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2563         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2564         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2565         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2566         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2567         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2568         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2569         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2570         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2571         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2572         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2573
2574         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2575         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2576         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2577         /* number of streams to pre-open on a association */
2578         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2579
2580         m->default_mtu = 0;
2581         /* Add adaptation cookie */
2582         m->adaptation_layer_indicator = 0;
2583         m->adaptation_layer_indicator_provided = 0;
2584
2585         /* seed random number generator */
2586         m->random_counter = 1;
2587         m->store_at = SCTP_SIGNATURE_SIZE;
2588         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2589         sctp_fill_random_store(m);
2590
2591         /* Minimum cookie size */
2592         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2593             sizeof(struct sctp_state_cookie);
2594         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2595
2596         /* Setup the initial secret */
2597         (void)SCTP_GETTIME_TIMEVAL(&time);
2598         m->time_of_secret_change = time.tv_sec;
2599
2600         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2601                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2602         }
2603         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2604
2605         /* How long is a cookie good for ? */
2606         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2607         /*
2608          * Initialize authentication parameters
2609          */
2610         m->local_hmacs = sctp_default_supported_hmaclist();
2611         m->local_auth_chunks = sctp_alloc_chunklist();
2612         if (inp->asconf_supported) {
2613                 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2614                 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2615         }
2616         m->default_dscp = 0;
2617 #ifdef INET6
2618         m->default_flowlabel = 0;
2619 #endif
2620         m->port = 0;            /* encapsulation disabled by default */
2621         LIST_INIT(&m->shared_keys);
2622         /* add default NULL key as key id 0 */
2623         null_key = sctp_alloc_sharedkey();
2624         sctp_insert_sharedkey(&m->shared_keys, null_key);
2625         SCTP_INP_WUNLOCK(inp);
2626 #ifdef SCTP_LOG_CLOSING
2627         sctp_log_closing(inp, NULL, 12);
2628 #endif
2629         return (error);
2630 }
2631
2632
2633 void
2634 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2635     struct sctp_tcb *stcb)
2636 {
2637         struct sctp_nets *net;
2638         uint16_t lport, rport;
2639         struct sctppcbhead *head;
2640         struct sctp_laddr *laddr, *oladdr;
2641
2642         atomic_add_int(&stcb->asoc.refcnt, 1);
2643         SCTP_TCB_UNLOCK(stcb);
2644         SCTP_INP_INFO_WLOCK();
2645         SCTP_INP_WLOCK(old_inp);
2646         SCTP_INP_WLOCK(new_inp);
2647         SCTP_TCB_LOCK(stcb);
2648         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2649
2650         new_inp->sctp_ep.time_of_secret_change =
2651             old_inp->sctp_ep.time_of_secret_change;
2652         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2653             sizeof(old_inp->sctp_ep.secret_key));
2654         new_inp->sctp_ep.current_secret_number =
2655             old_inp->sctp_ep.current_secret_number;
2656         new_inp->sctp_ep.last_secret_number =
2657             old_inp->sctp_ep.last_secret_number;
2658         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2659
2660         /* make it so new data pours into the new socket */
2661         stcb->sctp_socket = new_inp->sctp_socket;
2662         stcb->sctp_ep = new_inp;
2663
2664         /* Copy the port across */
2665         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2666         rport = stcb->rport;
2667         /* Pull the tcb from the old association */
2668         LIST_REMOVE(stcb, sctp_tcbhash);
2669         LIST_REMOVE(stcb, sctp_tcblist);
2670         if (stcb->asoc.in_asocid_hash) {
2671                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2672         }
2673         /* Now insert the new_inp into the TCP connected hash */
2674         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2675
2676         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2677         /* Its safe to access */
2678         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2679
2680         /* Now move the tcb into the endpoint list */
2681         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2682         /*
2683          * Question, do we even need to worry about the ep-hash since we
2684          * only have one connection? Probably not :> so lets get rid of it
2685          * and not suck up any kernel memory in that.
2686          */
2687         if (stcb->asoc.in_asocid_hash) {
2688                 struct sctpasochead *lhd;
2689
2690                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2691                     new_inp->hashasocidmark)];
2692                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2693         }
2694         /* Ok. Let's restart timer. */
2695         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2696                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2697                     stcb, net);
2698         }
2699
2700         SCTP_INP_INFO_WUNLOCK();
2701         if (new_inp->sctp_tcbhash != NULL) {
2702                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2703                 new_inp->sctp_tcbhash = NULL;
2704         }
2705         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2706                 /* Subset bound, so copy in the laddr list from the old_inp */
2707                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2708                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2709                         if (laddr == NULL) {
2710                                 /*
2711                                  * Gak, what can we do? This assoc is really
2712                                  * HOSED. We probably should send an abort
2713                                  * here.
2714                                  */
2715                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2716                                 continue;
2717                         }
2718                         SCTP_INCR_LADDR_COUNT();
2719                         memset(laddr, 0, sizeof(*laddr));
2720                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2721                         laddr->ifa = oladdr->ifa;
2722                         atomic_add_int(&laddr->ifa->refcount, 1);
2723                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2724                             sctp_nxt_addr);
2725                         new_inp->laddr_count++;
2726                         if (oladdr == stcb->asoc.last_used_address) {
2727                                 stcb->asoc.last_used_address = laddr;
2728                         }
2729                 }
2730         }
2731         /*
2732          * Now any running timers need to be adjusted since we really don't
2733          * care if they are running or not just blast in the new_inp into
2734          * all of them.
2735          */
2736
2737         stcb->asoc.dack_timer.ep = (void *)new_inp;
2738         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2739         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2740         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2741         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2742         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2743         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2744         /* now what about the nets? */
2745         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2746                 net->pmtu_timer.ep = (void *)new_inp;
2747                 net->hb_timer.ep = (void *)new_inp;
2748                 net->rxt_timer.ep = (void *)new_inp;
2749         }
2750         SCTP_INP_WUNLOCK(new_inp);
2751         SCTP_INP_WUNLOCK(old_inp);
2752 }
2753
2754 /*
2755  * insert an laddr entry with the given ifa for the desired list
2756  */
2757 static int
2758 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2759 {
2760         struct sctp_laddr *laddr;
2761
2762         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2763         if (laddr == NULL) {
2764                 /* out of memory? */
2765                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2766                 return (EINVAL);
2767         }
2768         SCTP_INCR_LADDR_COUNT();
2769         memset(laddr, 0, sizeof(*laddr));
2770         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2771         laddr->ifa = ifa;
2772         laddr->action = act;
2773         atomic_add_int(&ifa->refcount, 1);
2774         /* insert it */
2775         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2776
2777         return (0);
2778 }
2779
2780 /*
2781  * Remove an laddr entry from the local address list (on an assoc)
2782  */
2783 static void
2784 sctp_remove_laddr(struct sctp_laddr *laddr)
2785 {
2786
2787         /* remove from the list */
2788         LIST_REMOVE(laddr, sctp_nxt_addr);
2789         sctp_free_ifa(laddr->ifa);
2790         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2791         SCTP_DECR_LADDR_COUNT();
2792 }
2793
2794
2795
2796 /* sctp_ifap is used to bypass normal local address validation checks */
2797 int
2798 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2799     struct sctp_ifa *sctp_ifap, struct thread *p)
2800 {
2801         /* bind a ep to a socket address */
2802         struct sctppcbhead *head;
2803         struct sctp_inpcb *inp, *inp_tmp;
2804         struct inpcb *ip_inp;
2805         int port_reuse_active = 0;
2806         int bindall;
2807         uint16_t lport;
2808         int error;
2809         uint32_t vrf_id;
2810
2811         lport = 0;
2812         bindall = 1;
2813         inp = (struct sctp_inpcb *)so->so_pcb;
2814         ip_inp = (struct inpcb *)so->so_pcb;
2815 #ifdef SCTP_DEBUG
2816         if (addr) {
2817                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2818                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2819                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2820                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2821         }
2822 #endif
2823         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2824                 /* already did a bind, subsequent binds NOT allowed ! */
2825                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2826                 return (EINVAL);
2827         }
2828 #ifdef INVARIANTS
2829         if (p == NULL)
2830                 panic("null proc/thread");
2831 #endif
2832         if (addr != NULL) {
2833                 switch (addr->sa_family) {
2834 #ifdef INET
2835                 case AF_INET:
2836                         {
2837                                 struct sockaddr_in *sin;
2838
2839                                 /* IPV6_V6ONLY socket? */
2840                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2841                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2842                                         return (EINVAL);
2843                                 }
2844                                 if (addr->sa_len != sizeof(*sin)) {
2845                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2846                                         return (EINVAL);
2847                                 }
2848                                 sin = (struct sockaddr_in *)addr;
2849                                 lport = sin->sin_port;
2850                                 /*
2851                                  * For LOOPBACK the prison_local_ip4() call
2852                                  * will transmute the ip address to the
2853                                  * proper value.
2854                                  */
2855                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2856                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2857                                         return (error);
2858                                 }
2859                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2860                                         bindall = 0;
2861                                 }
2862                                 break;
2863                         }
2864 #endif
2865 #ifdef INET6
2866                 case AF_INET6:
2867                         {
2868                                 /*
2869                                  * Only for pure IPv6 Address. (No IPv4
2870                                  * Mapped!)
2871                                  */
2872                                 struct sockaddr_in6 *sin6;
2873
2874                                 sin6 = (struct sockaddr_in6 *)addr;
2875
2876                                 if (addr->sa_len != sizeof(*sin6)) {
2877                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2878                                         return (EINVAL);
2879                                 }
2880                                 lport = sin6->sin6_port;
2881                                 /*
2882                                  * For LOOPBACK the prison_local_ip6() call
2883                                  * will transmute the ipv6 address to the
2884                                  * proper value.
2885                                  */
2886                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2887                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2888                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2889                                         return (error);
2890                                 }
2891                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2892                                         bindall = 0;
2893                                         /* KAME hack: embed scopeid */
2894                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2895                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2896                                                 return (EINVAL);
2897                                         }
2898                                 }
2899                                 /* this must be cleared for ifa_ifwithaddr() */
2900                                 sin6->sin6_scope_id = 0;
2901                                 break;
2902                         }
2903 #endif
2904                 default:
2905                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2906                         return (EAFNOSUPPORT);
2907                 }
2908         }
2909         SCTP_INP_INFO_WLOCK();
2910         SCTP_INP_WLOCK(inp);
2911         /* Setup a vrf_id to be the default for the non-bind-all case. */
2912         vrf_id = inp->def_vrf_id;
2913
2914         /* increase our count due to the unlock we do */
2915         SCTP_INP_INCR_REF(inp);
2916         if (lport) {
2917                 /*
2918                  * Did the caller specify a port? if so we must see if an ep
2919                  * already has this one bound.
2920                  */
2921                 /* got to be root to get at low ports */
2922                 if (ntohs(lport) < IPPORT_RESERVED) {
2923                         if ((p != NULL) && ((error =
2924                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2925                             ) != 0)) {
2926                                 SCTP_INP_DECR_REF(inp);
2927                                 SCTP_INP_WUNLOCK(inp);
2928                                 SCTP_INP_INFO_WUNLOCK();
2929                                 return (error);
2930                         }
2931                 }
2932                 SCTP_INP_WUNLOCK(inp);
2933                 if (bindall) {
2934                         vrf_id = inp->def_vrf_id;
2935                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2936                         if (inp_tmp != NULL) {
2937                                 /*
2938                                  * lock guy returned and lower count note
2939                                  * that we are not bound so inp_tmp should
2940                                  * NEVER be inp. And it is this inp
2941                                  * (inp_tmp) that gets the reference bump,
2942                                  * so we must lower it.
2943                                  */
2944                                 SCTP_INP_DECR_REF(inp_tmp);
2945                                 /* unlock info */
2946                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2947                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2948                                         /*
2949                                          * Ok, must be one-2-one and
2950                                          * allowing port re-use
2951                                          */
2952                                         port_reuse_active = 1;
2953                                         goto continue_anyway;
2954                                 }
2955                                 SCTP_INP_DECR_REF(inp);
2956                                 SCTP_INP_INFO_WUNLOCK();
2957                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2958                                 return (EADDRINUSE);
2959                         }
2960                 } else {
2961                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2962                         if (inp_tmp != NULL) {
2963                                 /*
2964                                  * lock guy returned and lower count note
2965                                  * that we are not bound so inp_tmp should
2966                                  * NEVER be inp. And it is this inp
2967                                  * (inp_tmp) that gets the reference bump,
2968                                  * so we must lower it.
2969                                  */
2970                                 SCTP_INP_DECR_REF(inp_tmp);
2971                                 /* unlock info */
2972                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2973                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2974                                         /*
2975                                          * Ok, must be one-2-one and
2976                                          * allowing port re-use
2977                                          */
2978                                         port_reuse_active = 1;
2979                                         goto continue_anyway;
2980                                 }
2981                                 SCTP_INP_DECR_REF(inp);
2982                                 SCTP_INP_INFO_WUNLOCK();
2983                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2984                                 return (EADDRINUSE);
2985                         }
2986                 }
2987 continue_anyway:
2988                 SCTP_INP_WLOCK(inp);
2989                 if (bindall) {
2990                         /* verify that no lport is not used by a singleton */
2991                         if ((port_reuse_active == 0) &&
2992                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
2993                                 /* Sorry someone already has this one bound */
2994                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2995                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2996                                         port_reuse_active = 1;
2997                                 } else {
2998                                         SCTP_INP_DECR_REF(inp);
2999                                         SCTP_INP_WUNLOCK(inp);
3000                                         SCTP_INP_INFO_WUNLOCK();
3001                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3002                                         return (EADDRINUSE);
3003                                 }
3004                         }
3005                 }
3006         } else {
3007                 uint16_t first, last, candidate;
3008                 uint16_t count;
3009                 int done;
3010
3011                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3012                         first = MODULE_GLOBAL(ipport_hifirstauto);
3013                         last = MODULE_GLOBAL(ipport_hilastauto);
3014                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3015                         if (p && (error =
3016                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3017                             )) {
3018                                 SCTP_INP_DECR_REF(inp);
3019                                 SCTP_INP_WUNLOCK(inp);
3020                                 SCTP_INP_INFO_WUNLOCK();
3021                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3022                                 return (error);
3023                         }
3024                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3025                         last = MODULE_GLOBAL(ipport_lowlastauto);
3026                 } else {
3027                         first = MODULE_GLOBAL(ipport_firstauto);
3028                         last = MODULE_GLOBAL(ipport_lastauto);
3029                 }
3030                 if (first > last) {
3031                         uint16_t temp;
3032
3033                         temp = first;
3034                         first = last;
3035                         last = temp;
3036                 }
3037                 count = last - first + 1;       /* number of candidates */
3038                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3039
3040                 done = 0;
3041                 while (!done) {
3042                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3043                                 done = 1;
3044                         }
3045                         if (!done) {
3046                                 if (--count == 0) {
3047                                         SCTP_INP_DECR_REF(inp);
3048                                         SCTP_INP_WUNLOCK(inp);
3049                                         SCTP_INP_INFO_WUNLOCK();
3050                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3051                                         return (EADDRINUSE);
3052                                 }
3053                                 if (candidate == last)
3054                                         candidate = first;
3055                                 else
3056                                         candidate = candidate + 1;
3057                         }
3058                 }
3059                 lport = htons(candidate);
3060         }
3061         SCTP_INP_DECR_REF(inp);
3062         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3063             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3064                 /*
3065                  * this really should not happen. The guy did a non-blocking
3066                  * bind and then did a close at the same time.
3067                  */
3068                 SCTP_INP_WUNLOCK(inp);
3069                 SCTP_INP_INFO_WUNLOCK();
3070                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3071                 return (EINVAL);
3072         }
3073         /* ok we look clear to give out this port, so lets setup the binding */
3074         if (bindall) {
3075                 /* binding to all addresses, so just set in the proper flags */
3076                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3077                 /* set the automatic addr changes from kernel flag */
3078                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3079                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3080                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3081                 } else {
3082                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3083                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3084                 }
3085                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3086                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3087                 } else {
3088                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3089                 }
3090                 /*
3091                  * set the automatic mobility_base from kernel flag (by
3092                  * micchie)
3093                  */
3094                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3095                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3096                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3097                 } else {
3098                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3099                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3100                 }
3101                 /*
3102                  * set the automatic mobility_fasthandoff from kernel flag
3103                  * (by micchie)
3104                  */
3105                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3106                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3107                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3108                 } else {
3109                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3110                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3111                 }
3112         } else {
3113                 /*
3114                  * bind specific, make sure flags is off and add a new
3115                  * address structure to the sctp_addr_list inside the ep
3116                  * structure.
3117                  *
3118                  * We will need to allocate one and insert it at the head.
3119                  * The socketopt call can just insert new addresses in there
3120                  * as well. It will also have to do the embed scope kame
3121                  * hack too (before adding).
3122                  */
3123                 struct sctp_ifa *ifa;
3124                 union sctp_sockstore store;
3125
3126                 memset(&store, 0, sizeof(store));
3127                 switch (addr->sa_family) {
3128 #ifdef INET
3129                 case AF_INET:
3130                         memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3131                         store.sin.sin_port = 0;
3132                         break;
3133 #endif
3134 #ifdef INET6
3135                 case AF_INET6:
3136                         memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3137                         store.sin6.sin6_port = 0;
3138                         break;
3139 #endif
3140                 default:
3141                         break;
3142                 }
3143                 /*
3144                  * first find the interface with the bound address need to
3145                  * zero out the port to find the address! yuck! can't do
3146                  * this earlier since need port for sctp_pcb_findep()
3147                  */
3148                 if (sctp_ifap != NULL) {
3149                         ifa = sctp_ifap;
3150                 } else {
3151                         /*
3152                          * Note for BSD we hit here always other O/S's will
3153                          * pass things in via the sctp_ifap argument
3154                          * (Panda).
3155                          */
3156                         ifa = sctp_find_ifa_by_addr(&store.sa,
3157                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3158                 }
3159                 if (ifa == NULL) {
3160                         /* Can't find an interface with that address */
3161                         SCTP_INP_WUNLOCK(inp);
3162                         SCTP_INP_INFO_WUNLOCK();
3163                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3164                         return (EADDRNOTAVAIL);
3165                 }
3166 #ifdef INET6
3167                 if (addr->sa_family == AF_INET6) {
3168                         /* GAK, more FIXME IFA lock? */
3169                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3170                                 /* Can't bind a non-existent addr. */
3171                                 SCTP_INP_WUNLOCK(inp);
3172                                 SCTP_INP_INFO_WUNLOCK();
3173                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3174                                 return (EINVAL);
3175                         }
3176                 }
3177 #endif
3178                 /* we're not bound all */
3179                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3180                 /* allow bindx() to send ASCONF's for binding changes */
3181                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3182                 /* clear automatic addr changes from kernel flag */
3183                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3184
3185                 /* add this address to the endpoint list */
3186                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3187                 if (error != 0) {
3188                         SCTP_INP_WUNLOCK(inp);
3189                         SCTP_INP_INFO_WUNLOCK();
3190                         return (error);
3191                 }
3192                 inp->laddr_count++;
3193         }
3194         /* find the bucket */
3195         if (port_reuse_active) {
3196                 /* Put it into tcp 1-2-1 hash */
3197                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3198                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3199         } else {
3200                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3201         }
3202         /* put it in the bucket */
3203         LIST_INSERT_HEAD(head, inp, sctp_hash);
3204         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3205             (void *)head, ntohs(lport), port_reuse_active);
3206         /* set in the port */
3207         inp->sctp_lport = lport;
3208
3209         /* turn off just the unbound flag */
3210         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3211         SCTP_INP_WUNLOCK(inp);
3212         SCTP_INP_INFO_WUNLOCK();
3213         return (0);
3214 }
3215
3216
3217 static void
3218 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3219 {
3220         struct sctp_iterator *it, *nit;
3221
3222         /*
3223          * We enter with the only the ITERATOR_LOCK in place and a write
3224          * lock on the inp_info stuff.
3225          */
3226         it = sctp_it_ctl.cur_it;
3227         if (it && (it->vn != curvnet)) {
3228                 /* Its not looking at our VNET */
3229                 return;
3230         }
3231         if (it && (it->inp == inp)) {
3232                 /*
3233                  * This is tricky and we hold the iterator lock, but when it
3234                  * returns and gets the lock (when we release it) the
3235                  * iterator will try to operate on inp. We need to stop that
3236                  * from happening. But of course the iterator has a
3237                  * reference on the stcb and inp. We can mark it and it will
3238                  * stop.
3239                  *
3240                  * If its a single iterator situation, we set the end
3241                  * iterator flag. Otherwise we set the iterator to go to the
3242                  * next inp.
3243                  *
3244                  */
3245                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3246                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3247                 } else {
3248                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3249                 }
3250         }
3251         /*
3252          * Now go through and remove any single reference to our inp that
3253          * may be still pending on the list
3254          */
3255         SCTP_IPI_ITERATOR_WQ_LOCK();
3256         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3257                 if (it->vn != curvnet) {
3258                         continue;
3259                 }
3260                 if (it->inp == inp) {
3261                         /* This one points to me is it inp specific? */
3262                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3263                                 /* Remove and free this one */
3264                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3265                                     it, sctp_nxt_itr);
3266                                 if (it->function_atend != NULL) {
3267                                         (*it->function_atend) (it->pointer, it->val);
3268                                 }
3269                                 SCTP_FREE(it, SCTP_M_ITER);
3270                         } else {
3271                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3272                                 if (it->inp) {
3273                                         SCTP_INP_INCR_REF(it->inp);
3274                                 }
3275                         }
3276                         /*
3277                          * When its put in the refcnt is incremented so decr
3278                          * it
3279                          */
3280                         SCTP_INP_DECR_REF(inp);
3281                 }
3282         }
3283         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3284 }
3285
3286 /* release sctp_inpcb unbind the port */
3287 void
3288 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3289 {
3290         /*
3291          * Here we free a endpoint. We must find it (if it is in the Hash
3292          * table) and remove it from there. Then we must also find it in the
3293          * overall list and remove it from there. After all removals are
3294          * complete then any timer has to be stopped. Then start the actual
3295          * freeing. a) Any local lists. b) Any associations. c) The hash of
3296          * all associations. d) finally the ep itself.
3297          */
3298         struct sctp_tcb *asoc, *nasoc;
3299         struct sctp_laddr *laddr, *nladdr;
3300         struct inpcb *ip_pcb;
3301         struct socket *so;
3302         int being_refed = 0;
3303         struct sctp_queued_to_read *sq, *nsq;
3304         int cnt;
3305         sctp_sharedkey_t *shared_key, *nshared_key;
3306
3307
3308 #ifdef SCTP_LOG_CLOSING
3309         sctp_log_closing(inp, NULL, 0);
3310 #endif
3311         SCTP_ITERATOR_LOCK();
3312         /* mark any iterators on the list or being processed */
3313         sctp_iterator_inp_being_freed(inp);
3314         SCTP_ITERATOR_UNLOCK();
3315         so = inp->sctp_socket;
3316         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3317                 /* been here before.. eeks.. get out of here */
3318                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3319 #ifdef SCTP_LOG_CLOSING
3320                 sctp_log_closing(inp, NULL, 1);
3321 #endif
3322                 return;
3323         }
3324         SCTP_ASOC_CREATE_LOCK(inp);
3325         SCTP_INP_INFO_WLOCK();
3326
3327         SCTP_INP_WLOCK(inp);
3328         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3329                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3330                 /* socket is gone, so no more wakeups allowed */
3331                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3332                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3333                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3334
3335         }
3336         /* First time through we have the socket lock, after that no more. */
3337         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3338             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3339
3340         if (inp->control) {
3341                 sctp_m_freem(inp->control);
3342                 inp->control = NULL;
3343         }
3344         if (inp->pkt) {
3345                 sctp_m_freem(inp->pkt);
3346                 inp->pkt = NULL;
3347         }
3348         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3349                                          * here but I will be nice :> (i.e.
3350                                          * ip_pcb = ep;) */
3351         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3352                 int cnt_in_sd;
3353
3354                 cnt_in_sd = 0;
3355                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3356                         SCTP_TCB_LOCK(asoc);
3357                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3358                                 /* Skip guys being freed */
3359                                 cnt_in_sd++;
3360                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3361                                         /*
3362                                          * Special case - we did not start a
3363                                          * kill timer on the asoc due to it
3364                                          * was not closed. So go ahead and
3365                                          * start it now.
3366                                          */
3367                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3368                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3369                                 }
3370                                 SCTP_TCB_UNLOCK(asoc);
3371                                 continue;
3372                         }
3373                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3374                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3375                             (asoc->asoc.total_output_queue_size == 0)) {
3376                                 /*
3377                                  * If we have data in queue, we don't want
3378                                  * to just free since the app may have done,
3379                                  * send()/close or connect/send/close. And
3380                                  * it wants the data to get across first.
3381                                  */
3382                                 /* Just abandon things in the front states */
3383                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3384                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3385                                         cnt_in_sd++;
3386                                 }
3387                                 continue;
3388                         }
3389                         /* Disconnect the socket please */
3390                         asoc->sctp_socket = NULL;
3391                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3392                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3393                             (asoc->asoc.control_pdapi) ||
3394                             (asoc->asoc.size_on_all_streams > 0) ||
3395                             (so && (so->so_rcv.sb_cc > 0))) {
3396                                 /* Left with Data unread */
3397                                 struct mbuf *op_err;
3398
3399                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3400                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3401                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3402                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3403                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3404                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3405                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3406                                 }
3407                                 if (sctp_free_assoc(inp, asoc,
3408                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3409                                         cnt_in_sd++;
3410                                 }
3411                                 continue;
3412                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3413                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3414                             (asoc->asoc.stream_queue_cnt == 0)) {
3415                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3416                                         goto abort_anyway;
3417                                 }
3418                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3419                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3420                                         struct sctp_nets *netp;
3421
3422                                         /*
3423                                          * there is nothing queued to send,
3424                                          * so I send shutdown
3425                                          */
3426                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3427                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3428                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3429                                         }
3430                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3431                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3432                                         sctp_stop_timers_for_shutdown(asoc);
3433                                         if (asoc->asoc.alternate) {
3434                                                 netp = asoc->asoc.alternate;
3435                                         } else {
3436                                                 netp = asoc->asoc.primary_destination;
3437                                         }
3438                                         sctp_send_shutdown(asoc, netp);
3439                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3440                                             netp);
3441                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3442                                             asoc->asoc.primary_destination);
3443                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3444                                 }
3445                         } else {
3446                                 /* mark into shutdown pending */
3447                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3448                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3449                                     asoc->asoc.primary_destination);
3450                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3451                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3452                                 }
3453                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3454                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3455                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3456                                         struct mbuf *op_err;
3457
3458                         abort_anyway:
3459                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3460                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3461                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3462                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3463                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3464                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3465                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3466                                         }
3467                                         if (sctp_free_assoc(inp, asoc,
3468                                             SCTP_PCBFREE_NOFORCE,
3469                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3470                                                 cnt_in_sd++;
3471                                         }
3472                                         continue;
3473                                 } else {
3474                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3475                                 }
3476                         }
3477                         cnt_in_sd++;
3478                         SCTP_TCB_UNLOCK(asoc);
3479                 }
3480                 /* now is there some left in our SHUTDOWN state? */
3481                 if (cnt_in_sd) {
3482 #ifdef SCTP_LOG_CLOSING
3483                         sctp_log_closing(inp, NULL, 2);
3484 #endif
3485                         inp->sctp_socket = NULL;
3486                         SCTP_INP_WUNLOCK(inp);
3487                         SCTP_ASOC_CREATE_UNLOCK(inp);
3488                         SCTP_INP_INFO_WUNLOCK();
3489                         return;
3490                 }
3491         }
3492         inp->sctp_socket = NULL;
3493         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3494             SCTP_PCB_FLAGS_UNBOUND) {
3495                 /*
3496                  * ok, this guy has been bound. It's port is somewhere in
3497                  * the SCTP_BASE_INFO(hash table). Remove it!
3498                  */
3499                 LIST_REMOVE(inp, sctp_hash);
3500                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3501         }
3502         /*
3503          * If there is a timer running to kill us, forget it, since it may
3504          * have a contest on the INP lock.. which would cause us to die ...
3505          */
3506         cnt = 0;
3507         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3508                 SCTP_TCB_LOCK(asoc);
3509                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3510                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3511                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3512                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3513                         }
3514                         cnt++;
3515                         SCTP_TCB_UNLOCK(asoc);
3516                         continue;
3517                 }
3518                 /* Free associations that are NOT killing us */
3519                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3520                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3521                         struct mbuf *op_err;
3522
3523                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3524                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3525                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3526                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3527                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3528                         cnt++;
3529                         SCTP_TCB_UNLOCK(asoc);
3530                         continue;
3531                 }
3532                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3533                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3534                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3535                 }
3536                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3537                     SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3538                         cnt++;
3539                 }
3540         }
3541         if (cnt) {
3542                 /* Ok we have someone out there that will kill us */
3543                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3544 #ifdef SCTP_LOG_CLOSING
3545                 sctp_log_closing(inp, NULL, 3);
3546 #endif
3547                 SCTP_INP_WUNLOCK(inp);
3548                 SCTP_ASOC_CREATE_UNLOCK(inp);
3549                 SCTP_INP_INFO_WUNLOCK();
3550                 return;
3551         }
3552         if (SCTP_INP_LOCK_CONTENDED(inp))
3553                 being_refed++;
3554         if (SCTP_INP_READ_CONTENDED(inp))
3555                 being_refed++;
3556         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3557                 being_refed++;
3558
3559         if ((inp->refcount) ||
3560             (being_refed) ||
3561             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3562                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3563 #ifdef SCTP_LOG_CLOSING
3564                 sctp_log_closing(inp, NULL, 4);
3565 #endif
3566                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3567                 SCTP_INP_WUNLOCK(inp);
3568                 SCTP_ASOC_CREATE_UNLOCK(inp);
3569                 SCTP_INP_INFO_WUNLOCK();
3570                 return;
3571         }
3572         inp->sctp_ep.signature_change.type = 0;
3573         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3574         /*
3575          * Remove it from the list .. last thing we need a lock for.
3576          */
3577         LIST_REMOVE(inp, sctp_list);
3578         SCTP_INP_WUNLOCK(inp);
3579         SCTP_ASOC_CREATE_UNLOCK(inp);
3580         SCTP_INP_INFO_WUNLOCK();
3581         /*
3582          * Now we release all locks. Since this INP cannot be found anymore
3583          * except possibly by the kill timer that might be running. We call
3584          * the drain function here. It should hit the case were it sees the
3585          * ACTIVE flag cleared and exit out freeing us to proceed and
3586          * destroy everything.
3587          */
3588         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3589                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3590         } else {
3591                 /* Probably un-needed */
3592                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3593         }
3594
3595 #ifdef SCTP_LOG_CLOSING
3596         sctp_log_closing(inp, NULL, 5);
3597 #endif
3598
3599
3600         if ((inp->sctp_asocidhash) != NULL) {
3601                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3602                 inp->sctp_asocidhash = NULL;
3603         }
3604         /* sa_ignore FREED_MEMORY */
3605         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3606                 /* Its only abandoned if it had data left */
3607                 if (sq->length)
3608                         SCTP_STAT_INCR(sctps_left_abandon);
3609
3610                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3611                 sctp_free_remote_addr(sq->whoFrom);
3612                 if (so)
3613                         so->so_rcv.sb_cc -= sq->length;
3614                 if (sq->data) {
3615                         sctp_m_freem(sq->data);
3616                         sq->data = NULL;
3617                 }
3618                 /*
3619                  * no need to free the net count, since at this point all
3620                  * assoc's are gone.
3621                  */
3622                 sctp_free_a_readq(NULL, sq);
3623         }
3624         /* Now the sctp_pcb things */
3625         /*
3626          * free each asoc if it is not already closed/free. we can't use the
3627          * macro here since le_next will get freed as part of the
3628          * sctp_free_assoc() call.
3629          */
3630         if (ip_pcb->inp_options) {
3631                 (void)sctp_m_free(ip_pcb->inp_options);
3632                 ip_pcb->inp_options = 0;
3633         }
3634 #ifdef INET6
3635         if (ip_pcb->inp_vflag & INP_IPV6) {
3636                 struct in6pcb *in6p;
3637
3638                 in6p = (struct in6pcb *)inp;
3639                 ip6_freepcbopts(in6p->in6p_outputopts);
3640         }
3641 #endif                          /* INET6 */
3642         ip_pcb->inp_vflag = 0;
3643         /* free up authentication fields */
3644         if (inp->sctp_ep.local_auth_chunks != NULL)
3645                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3646         if (inp->sctp_ep.local_hmacs != NULL)
3647                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3648
3649         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3650                 LIST_REMOVE(shared_key, next);
3651                 sctp_free_sharedkey(shared_key);
3652                 /* sa_ignore FREED_MEMORY */
3653         }
3654
3655         /*
3656          * if we have an address list the following will free the list of
3657          * ifaddr's that are set into this ep. Again macro limitations here,
3658          * since the LIST_FOREACH could be a bad idea.
3659          */
3660         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3661                 sctp_remove_laddr(laddr);
3662         }
3663
3664 #ifdef SCTP_TRACK_FREED_ASOCS
3665         /* TEMP CODE */
3666         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3667                 LIST_REMOVE(asoc, sctp_tcblist);
3668                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3669                 SCTP_DECR_ASOC_COUNT();
3670         }
3671         /* *** END TEMP CODE *** */
3672 #endif
3673         /* Now lets see about freeing the EP hash table. */
3674         if (inp->sctp_tcbhash != NULL) {
3675                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3676                 inp->sctp_tcbhash = NULL;
3677         }
3678         /* Now we must put the ep memory back into the zone pool */
3679         crfree(inp->ip_inp.inp.inp_cred);
3680         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3681         SCTP_INP_LOCK_DESTROY(inp);
3682         SCTP_INP_READ_DESTROY(inp);
3683         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3684         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3685         SCTP_DECR_EP_COUNT();
3686 }
3687
3688
3689 struct sctp_nets *
3690 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3691 {
3692         struct sctp_nets *net;
3693
3694         /* locate the address */
3695         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3696                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3697                         return (net);
3698         }
3699         return (NULL);
3700 }
3701
3702
3703 int
3704 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3705 {
3706         struct sctp_ifa *sctp_ifa;
3707
3708         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3709         if (sctp_ifa) {
3710                 return (1);
3711         } else {
3712                 return (0);
3713         }
3714 }
3715
3716 /*
3717  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3718  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3719  * stats of stuff.
3720  */
3721 int
3722 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3723     struct sctp_nets **netp, uint16_t port, int set_scope, int from)
3724 {
3725         /*
3726          * The following is redundant to the same lines in the
3727          * sctp_aloc_assoc() but is needed since others call the add address
3728          * function
3729          */
3730         struct sctp_nets *net, *netfirst;
3731         int addr_inscope;
3732
3733         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3734             from);
3735         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3736
3737         netfirst = sctp_findnet(stcb, newaddr);
3738         if (netfirst) {
3739                 /*
3740                  * Lie and return ok, we don't want to make the association
3741                  * go away for this behavior. It will happen in the TCP
3742                  * model in a connected socket. It does not reach the hash
3743                  * table until after the association is built so it can't be
3744                  * found. Mark as reachable, since the initial creation will
3745                  * have been cleared and the NOT_IN_ASSOC flag will have
3746                  * been added... and we don't want to end up removing it
3747                  * back out.
3748                  */
3749                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3750                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3751                             SCTP_ADDR_UNCONFIRMED);
3752                 } else {
3753                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3754                 }
3755
3756                 return (0);
3757         }
3758         addr_inscope = 1;
3759         switch (newaddr->sa_family) {
3760 #ifdef INET
3761         case AF_INET:
3762                 {
3763                         struct sockaddr_in *sin;
3764
3765                         sin = (struct sockaddr_in *)newaddr;
3766                         if (sin->sin_addr.s_addr == 0) {
3767                                 /* Invalid address */
3768                                 return (-1);
3769                         }
3770                         /* zero out the zero area */
3771                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3772
3773                         /* assure len is set */
3774                         sin->sin_len = sizeof(struct sockaddr_in);
3775                         if (set_scope) {
3776                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3777                                         stcb->asoc.scope.ipv4_local_scope = 1;
3778                                 }
3779                         } else {
3780                                 /* Validate the address is in scope */
3781                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3782                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3783                                         addr_inscope = 0;
3784                                 }
3785                         }
3786                         break;
3787                 }
3788 #endif
3789 #ifdef INET6
3790         case AF_INET6:
3791                 {
3792                         struct sockaddr_in6 *sin6;
3793
3794                         sin6 = (struct sockaddr_in6 *)newaddr;
3795                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3796                                 /* Invalid address */
3797                                 return (-1);
3798                         }
3799                         /* assure len is set */
3800                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3801                         if (set_scope) {
3802                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3803                                         stcb->asoc.scope.loopback_scope = 1;
3804                                         stcb->asoc.scope.local_scope = 0;
3805                                         stcb->asoc.scope.ipv4_local_scope = 1;
3806                                         stcb->asoc.scope.site_scope = 1;
3807                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3808                                         /*
3809                                          * If the new destination is a
3810                                          * LINK_LOCAL we must have common
3811                                          * site scope. Don't set the local
3812                                          * scope since we may not share all
3813                                          * links, only loopback can do this.
3814                                          * Links on the local network would
3815                                          * also be on our private network
3816                                          * for v4 too.
3817                                          */
3818                                         stcb->asoc.scope.ipv4_local_scope = 1;
3819                                         stcb->asoc.scope.site_scope = 1;
3820                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3821                                         /*
3822                                          * If the new destination is
3823                                          * SITE_LOCAL then we must have site
3824                                          * scope in common.
3825                                          */
3826                                         stcb->asoc.scope.site_scope = 1;
3827                                 }
3828                         } else {
3829                                 /* Validate the address is in scope */
3830                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3831                                     (stcb->asoc.scope.loopback_scope == 0)) {
3832                                         addr_inscope = 0;
3833                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3834                                     (stcb->asoc.scope.local_scope == 0)) {
3835                                         addr_inscope = 0;
3836                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3837                                     (stcb->asoc.scope.site_scope == 0)) {
3838                                         addr_inscope = 0;
3839                                 }
3840                         }
3841                         break;
3842                 }
3843 #endif
3844         default:
3845                 /* not supported family type */
3846                 return (-1);
3847         }
3848         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3849         if (net == NULL) {
3850                 return (-1);
3851         }
3852         SCTP_INCR_RADDR_COUNT();
3853         memset(net, 0, sizeof(struct sctp_nets));
3854         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3855         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3856         switch (newaddr->sa_family) {
3857 #ifdef INET
3858         case AF_INET:
3859                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3860                 break;
3861 #endif
3862 #ifdef INET6
3863         case AF_INET6:
3864                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3865                 break;
3866 #endif
3867         default:
3868                 break;
3869         }
3870         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3871         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3872                 stcb->asoc.scope.loopback_scope = 1;
3873                 stcb->asoc.scope.ipv4_local_scope = 1;
3874                 stcb->asoc.scope.local_scope = 0;
3875                 stcb->asoc.scope.site_scope = 1;
3876                 addr_inscope = 1;
3877         }
3878         net->failure_threshold = stcb->asoc.def_net_failure;
3879         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3880         if (addr_inscope == 0) {
3881                 net->dest_state = (SCTP_ADDR_REACHABLE |
3882                     SCTP_ADDR_OUT_OF_SCOPE);
3883         } else {
3884                 if (from == SCTP_ADDR_IS_CONFIRMED)
3885                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3886                         net->dest_state = SCTP_ADDR_REACHABLE;
3887                 else
3888                         net->dest_state = SCTP_ADDR_REACHABLE |
3889                             SCTP_ADDR_UNCONFIRMED;
3890         }
3891         /*
3892          * We set this to 0, the timer code knows that this means its an
3893          * initial value
3894          */
3895         net->rto_needed = 1;
3896         net->RTO = 0;
3897         net->RTO_measured = 0;
3898         stcb->asoc.numnets++;
3899         net->ref_count = 1;
3900         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3901         net->port = port;
3902         net->dscp = stcb->asoc.default_dscp;
3903 #ifdef INET6
3904         net->flowlabel = stcb->asoc.default_flowlabel;
3905 #endif
3906         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3907                 net->dest_state |= SCTP_ADDR_NOHB;
3908         } else {
3909                 net->dest_state &= ~SCTP_ADDR_NOHB;
3910         }
3911         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3912                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3913         } else {
3914                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3915         }
3916         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3917         /* Init the timer structure */
3918         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3919         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3920         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3921
3922         /* Now generate a route for this guy */
3923 #ifdef INET6
3924         /* KAME hack: embed scopeid */
3925         if (newaddr->sa_family == AF_INET6) {
3926                 struct sockaddr_in6 *sin6;
3927
3928                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3929                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3930                 sin6->sin6_scope_id = 0;
3931         }
3932 #endif
3933         SCTP_RTALLOC((sctp_route_t *)&net->ro,
3934             stcb->asoc.vrf_id,
3935             stcb->sctp_ep->fibnum);
3936
3937         net->src_addr_selected = 0;
3938         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3939                 /* Get source address */
3940                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3941                     stcb,
3942                     (sctp_route_t *)&net->ro,
3943                     net,
3944                     0,
3945                     stcb->asoc.vrf_id);
3946                 if (stcb->asoc.default_mtu > 0) {
3947                         net->mtu = stcb->asoc.default_mtu;
3948                         switch (net->ro._l_addr.sa.sa_family) {
3949 #ifdef INET
3950                         case AF_INET:
3951                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
3952                                 break;
3953 #endif
3954 #ifdef INET6
3955                         case AF_INET6:
3956                                 net->mtu += SCTP_MIN_OVERHEAD;
3957                                 break;
3958 #endif
3959                         default:
3960                                 break;
3961                         }
3962 #if defined(INET) || defined(INET6)
3963                         if (net->port) {
3964                                 net->mtu += (uint32_t)sizeof(struct udphdr);
3965                         }
3966 #endif
3967                 } else if (net->ro._s_addr != NULL) {
3968                         uint32_t imtu, rmtu, hcmtu;
3969
3970                         net->src_addr_selected = 1;
3971                         /* Now get the interface MTU */
3972                         if (net->ro._s_addr->ifn_p != NULL) {
3973                                 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3974                         } else {
3975                                 imtu = 0;
3976                         }
3977                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3978                         hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum);
3979                         net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu);
3980                         if (rmtu == 0) {
3981                                 /*
3982                                  * Start things off to match mtu of
3983                                  * interface please.
3984                                  */
3985                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3986                                     net->ro.ro_rt, net->mtu);
3987                         }
3988                 }
3989         }
3990         if (net->mtu == 0) {
3991                 if (stcb->asoc.default_mtu > 0) {
3992                         net->mtu = stcb->asoc.default_mtu;
3993                         switch (net->ro._l_addr.sa.sa_family) {
3994 #ifdef INET
3995                         case AF_INET:
3996                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
3997                                 break;
3998 #endif
3999 #ifdef INET6
4000                         case AF_INET6:
4001                                 net->mtu += SCTP_MIN_OVERHEAD;
4002                                 break;
4003 #endif
4004                         default:
4005                                 break;
4006                         }
4007 #if defined(INET) || defined(INET6)
4008                         if (net->port) {
4009                                 net->mtu += (uint32_t)sizeof(struct udphdr);
4010                         }
4011 #endif
4012                 } else {
4013                         switch (newaddr->sa_family) {
4014 #ifdef INET
4015                         case AF_INET:
4016                                 net->mtu = SCTP_DEFAULT_MTU;
4017                                 break;
4018 #endif
4019 #ifdef INET6
4020                         case AF_INET6:
4021                                 net->mtu = 1280;
4022                                 break;
4023 #endif
4024                         default:
4025                                 break;
4026                         }
4027                 }
4028         }
4029 #if defined(INET) || defined(INET6)
4030         if (net->port) {
4031                 net->mtu -= (uint32_t)sizeof(struct udphdr);
4032         }
4033 #endif
4034         if (from == SCTP_ALLOC_ASOC) {
4035                 stcb->asoc.smallest_mtu = net->mtu;
4036         }
4037         if (stcb->asoc.smallest_mtu > net->mtu) {
4038                 sctp_pathmtu_adjustment(stcb, net->mtu);
4039         }
4040 #ifdef INET6
4041         if (newaddr->sa_family == AF_INET6) {
4042                 struct sockaddr_in6 *sin6;
4043
4044                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4045                 (void)sa6_recoverscope(sin6);
4046         }
4047 #endif
4048
4049         /* JRS - Use the congestion control given in the CC module */
4050         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4051                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4052
4053         /*
4054          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4055          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4056          */
4057         net->find_pseudo_cumack = 1;
4058         net->find_rtx_pseudo_cumack = 1;
4059         /* Choose an initial flowid. */
4060         net->flowid = stcb->asoc.my_vtag ^
4061             ntohs(stcb->rport) ^
4062             ntohs(stcb->sctp_ep->sctp_lport);
4063         net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4064         if (netp) {
4065                 *netp = net;
4066         }
4067         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4068         if (net->ro.ro_rt == NULL) {
4069                 /* Since we have no route put it at the back */
4070                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4071         } else if (netfirst == NULL) {
4072                 /* We are the first one in the pool. */
4073                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4074         } else if (netfirst->ro.ro_rt == NULL) {
4075                 /*
4076                  * First one has NO route. Place this one ahead of the first
4077                  * one.
4078                  */
4079                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4080         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4081                 /*
4082                  * This one has a different interface than the one at the
4083                  * top of the list. Place it ahead.
4084                  */
4085                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4086         } else {
4087                 /*
4088                  * Ok we have the same interface as the first one. Move
4089                  * forward until we find either a) one with a NULL route...
4090                  * insert ahead of that b) one with a different ifp.. insert
4091                  * after that. c) end of the list.. insert at the tail.
4092                  */
4093                 struct sctp_nets *netlook;
4094
4095                 do {
4096                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4097                         if (netlook == NULL) {
4098                                 /* End of the list */
4099                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4100                                 break;
4101                         } else if (netlook->ro.ro_rt == NULL) {
4102                                 /* next one has NO route */
4103                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4104                                 break;
4105                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4106                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4107                                     net, sctp_next);
4108                                 break;
4109                         }
4110                         /* Shift forward */
4111                         netfirst = netlook;
4112                 } while (netlook != NULL);
4113         }
4114
4115         /* got to have a primary set */
4116         if (stcb->asoc.primary_destination == 0) {
4117                 stcb->asoc.primary_destination = net;
4118         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4119                     (net->ro.ro_rt) &&
4120             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4121                 /* No route to current primary adopt new primary */
4122                 stcb->asoc.primary_destination = net;
4123         }
4124         /* Validate primary is first */
4125         net = TAILQ_FIRST(&stcb->asoc.nets);
4126         if ((net != stcb->asoc.primary_destination) &&
4127             (stcb->asoc.primary_destination)) {
4128                 /*
4129                  * first one on the list is NOT the primary sctp_cmpaddr()
4130                  * is much more efficient if the primary is the first on the
4131                  * list, make it so.
4132                  */
4133                 TAILQ_REMOVE(&stcb->asoc.nets,
4134                     stcb->asoc.primary_destination, sctp_next);
4135                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4136                     stcb->asoc.primary_destination, sctp_next);
4137         }
4138         return (0);
4139 }
4140
4141
4142 static uint32_t
4143 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4144 {
4145         uint32_t id;
4146         struct sctpasochead *head;
4147         struct sctp_tcb *lstcb;
4148
4149         SCTP_INP_WLOCK(inp);
4150 try_again:
4151         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4152                 /* TSNH */
4153                 SCTP_INP_WUNLOCK(inp);
4154                 return (0);
4155         }
4156         /*
4157          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4158          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4159          */
4160         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4161                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4162         }
4163         id = inp->sctp_associd_counter;
4164         inp->sctp_associd_counter++;
4165         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4166         if (lstcb) {
4167                 goto try_again;
4168         }
4169         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4170         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4171         stcb->asoc.in_asocid_hash = 1;
4172         SCTP_INP_WUNLOCK(inp);
4173         return id;
4174 }
4175
4176 /*
4177  * allocate an association and add it to the endpoint. The caller must be
4178  * careful to add all additional addresses once they are know right away or
4179  * else the assoc will be may experience a blackout scenario.
4180  */
4181 struct sctp_tcb *
4182 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4183     int *error, uint32_t override_tag, uint32_t vrf_id,
4184     uint16_t o_streams, uint16_t port,
4185     struct thread *p
4186 )
4187 {
4188         /* note the p argument is only valid in unbound sockets */
4189
4190         struct sctp_tcb *stcb;
4191         struct sctp_association *asoc;
4192         struct sctpasochead *head;
4193         uint16_t rport;
4194         int err;
4195
4196         /*
4197          * Assumption made here: Caller has done a
4198          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4199          * address does not exist already.
4200          */
4201         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4202                 /* Hit max assoc, sorry no more */
4203                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4204                 *error = ENOBUFS;
4205                 return (NULL);
4206         }
4207         if (firstaddr == NULL) {
4208                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4209                 *error = EINVAL;
4210                 return (NULL);
4211         }
4212         SCTP_INP_RLOCK(inp);
4213         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4214             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4215             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4216                 /*
4217                  * If its in the TCP pool, its NOT allowed to create an
4218                  * association. The parent listener needs to call
4219                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4220                  * off, or connected one does this.. its an error.
4221                  */
4222                 SCTP_INP_RUNLOCK(inp);
4223                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4224                 *error = EINVAL;
4225                 return (NULL);
4226         }
4227         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4228             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4229                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4230                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4231                         SCTP_INP_RUNLOCK(inp);
4232                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4233                         *error = EINVAL;
4234                         return (NULL);
4235                 }
4236         }
4237         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4238 #ifdef SCTP_DEBUG
4239         if (firstaddr) {
4240                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4241                 switch (firstaddr->sa_family) {
4242 #ifdef INET
4243                 case AF_INET:
4244                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4245                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4246                         break;
4247 #endif
4248 #ifdef INET6
4249                 case AF_INET6:
4250                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4251                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4252                         break;
4253 #endif
4254                 default:
4255                         break;
4256                 }
4257         } else {
4258                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4259         }
4260 #endif                          /* SCTP_DEBUG */
4261         switch (firstaddr->sa_family) {
4262 #ifdef INET
4263         case AF_INET:
4264                 {
4265                         struct sockaddr_in *sin;
4266
4267                         sin = (struct sockaddr_in *)firstaddr;
4268                         if ((ntohs(sin->sin_port) == 0) ||
4269                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4270                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4271                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4272                                 /* Invalid address */
4273                                 SCTP_INP_RUNLOCK(inp);
4274                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4275                                 *error = EINVAL;
4276                                 return (NULL);
4277                         }
4278                         rport = sin->sin_port;
4279                         break;
4280                 }
4281 #endif
4282 #ifdef INET6
4283         case AF_INET6:
4284                 {
4285                         struct sockaddr_in6 *sin6;
4286
4287                         sin6 = (struct sockaddr_in6 *)firstaddr;
4288                         if ((ntohs(sin6->sin6_port) == 0) ||
4289                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4290                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4291                                 /* Invalid address */
4292                                 SCTP_INP_RUNLOCK(inp);
4293                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4294                                 *error = EINVAL;
4295                                 return (NULL);
4296                         }
4297                         rport = sin6->sin6_port;
4298                         break;
4299                 }
4300 #endif
4301         default:
4302                 /* not supported family type */
4303                 SCTP_INP_RUNLOCK(inp);
4304                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4305                 *error = EINVAL;
4306                 return (NULL);
4307         }
4308         SCTP_INP_RUNLOCK(inp);
4309         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4310                 /*
4311                  * If you have not performed a bind, then we need to do the
4312                  * ephemeral bind for you.
4313                  */
4314                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4315                     (struct sockaddr *)NULL,
4316                     (struct sctp_ifa *)NULL,
4317                     p
4318                     ))) {
4319                         /* bind error, probably perm */
4320                         *error = err;
4321                         return (NULL);
4322                 }
4323         }
4324         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4325         if (stcb == NULL) {
4326                 /* out of memory? */
4327                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4328                 *error = ENOMEM;
4329                 return (NULL);
4330         }
4331         SCTP_INCR_ASOC_COUNT();
4332
4333         memset(stcb, 0, sizeof(*stcb));
4334         asoc = &stcb->asoc;
4335
4336         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4337         SCTP_TCB_LOCK_INIT(stcb);
4338         SCTP_TCB_SEND_LOCK_INIT(stcb);
4339         stcb->rport = rport;
4340         /* setup back pointer's */
4341         stcb->sctp_ep = inp;
4342         stcb->sctp_socket = inp->sctp_socket;
4343         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
4344                 /* failed */
4345                 SCTP_TCB_LOCK_DESTROY(stcb);
4346                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4347                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4348                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4349                 SCTP_DECR_ASOC_COUNT();
4350                 *error = err;
4351                 return (NULL);
4352         }
4353         /* and the port */
4354         SCTP_INP_INFO_WLOCK();
4355         SCTP_INP_WLOCK(inp);
4356         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4357                 /* inpcb freed while alloc going on */
4358                 SCTP_TCB_LOCK_DESTROY(stcb);
4359                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4360                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4361                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4362                 SCTP_INP_WUNLOCK(inp);
4363                 SCTP_INP_INFO_WUNLOCK();
4364                 SCTP_DECR_ASOC_COUNT();
4365                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4366                 *error = EINVAL;
4367                 return (NULL);
4368         }
4369         SCTP_TCB_LOCK(stcb);
4370
4371         /* now that my_vtag is set, add it to the hash */
4372         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4373         /* put it in the bucket in the vtag hash of assoc's for the system */
4374         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4375         SCTP_INP_INFO_WUNLOCK();
4376
4377         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4378                 /* failure.. memory error? */
4379                 if (asoc->strmout) {
4380                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4381                         asoc->strmout = NULL;
4382                 }
4383                 if (asoc->mapping_array) {
4384                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4385                         asoc->mapping_array = NULL;
4386                 }
4387                 if (asoc->nr_mapping_array) {
4388                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4389                         asoc->nr_mapping_array = NULL;
4390                 }
4391                 SCTP_DECR_ASOC_COUNT();
4392                 SCTP_TCB_UNLOCK(stcb);
4393                 SCTP_TCB_LOCK_DESTROY(stcb);
4394                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4395                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4396                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4397                 SCTP_INP_WUNLOCK(inp);
4398                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4399                 *error = ENOBUFS;
4400                 return (NULL);
4401         }
4402         /* Init all the timers */
4403         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4404         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4405         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4406         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4407         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4408         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4409         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4410
4411         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4412         /* now file the port under the hash as well */
4413         if (inp->sctp_tcbhash != NULL) {
4414                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4415                     inp->sctp_hashmark)];
4416                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4417         }
4418         SCTP_INP_WUNLOCK(inp);
4419         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4420         return (stcb);
4421 }
4422
4423
4424 void
4425 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4426 {
4427         struct sctp_association *asoc;
4428
4429         asoc = &stcb->asoc;
4430         asoc->numnets--;
4431         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4432         if (net == asoc->primary_destination) {
4433                 /* Reset primary */
4434                 struct sctp_nets *lnet;
4435
4436                 lnet = TAILQ_FIRST(&asoc->nets);
4437                 /*
4438                  * Mobility adaptation Ideally, if deleted destination is
4439                  * the primary, it becomes a fast retransmission trigger by
4440                  * the subsequent SET PRIMARY. (by micchie)
4441                  */
4442                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4443                     SCTP_MOBILITY_BASE) ||
4444                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4445                     SCTP_MOBILITY_FASTHANDOFF)) {
4446                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4447                         if (asoc->deleted_primary != NULL) {
4448                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4449                                 goto out;
4450                         }
4451                         asoc->deleted_primary = net;
4452                         atomic_add_int(&net->ref_count, 1);
4453                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4454                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4455                         sctp_mobility_feature_on(stcb->sctp_ep,
4456                             SCTP_MOBILITY_PRIM_DELETED);
4457                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4458                             stcb->sctp_ep, stcb, NULL);
4459                 }
4460 out:
4461                 /* Try to find a confirmed primary */
4462                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4463         }
4464         if (net == asoc->last_data_chunk_from) {
4465                 /* Reset primary */
4466                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4467         }
4468         if (net == asoc->last_control_chunk_from) {
4469                 /* Clear net */
4470                 asoc->last_control_chunk_from = NULL;
4471         }
4472         if (net == stcb->asoc.alternate) {
4473                 sctp_free_remote_addr(stcb->asoc.alternate);
4474                 stcb->asoc.alternate = NULL;
4475         }
4476         sctp_free_remote_addr(net);
4477 }
4478
4479 /*
4480  * remove a remote endpoint address from an association, it will fail if the
4481  * address does not exist.
4482  */
4483 int
4484 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4485 {
4486         /*
4487          * Here we need to remove a remote address. This is quite simple, we
4488          * first find it in the list of address for the association
4489          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4490          * on that item. Note we do not allow it to be removed if there are
4491          * no other addresses.
4492          */
4493         struct sctp_association *asoc;
4494         struct sctp_nets *net, *nnet;
4495
4496         asoc = &stcb->asoc;
4497
4498         /* locate the address */
4499         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4500                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4501                         continue;
4502                 }
4503                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4504                     remaddr)) {
4505                         /* we found the guy */
4506                         if (asoc->numnets < 2) {
4507                                 /* Must have at LEAST two remote addresses */
4508                                 return (-1);
4509                         } else {
4510                                 sctp_remove_net(stcb, net);
4511                                 return (0);
4512                         }
4513                 }
4514         }
4515         /* not found. */
4516         return (-2);
4517 }
4518
4519 void
4520 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4521 {
4522         struct sctpvtaghead *chain;
4523         struct sctp_tagblock *twait_block;
4524         int found = 0;
4525         int i;
4526
4527         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4528         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4529                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4530                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4531                             (twait_block->vtag_block[i].lport == lport) &&
4532                             (twait_block->vtag_block[i].rport == rport)) {
4533                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4534                                 twait_block->vtag_block[i].v_tag = 0;
4535                                 twait_block->vtag_block[i].lport = 0;
4536                                 twait_block->vtag_block[i].rport = 0;
4537                                 found = 1;
4538                                 break;
4539                         }
4540                 }
4541                 if (found)
4542                         break;
4543         }
4544 }
4545
4546 int
4547 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4548 {
4549         struct sctpvtaghead *chain;
4550         struct sctp_tagblock *twait_block;
4551         int found = 0;
4552         int i;
4553
4554         SCTP_INP_INFO_WLOCK();
4555         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4556         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4557                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4558                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4559                             (twait_block->vtag_block[i].lport == lport) &&
4560                             (twait_block->vtag_block[i].rport == rport)) {
4561                                 found = 1;
4562                                 break;
4563                         }
4564                 }
4565                 if (found)
4566                         break;
4567         }
4568         SCTP_INP_INFO_WUNLOCK();
4569         return (found);
4570 }
4571
4572
4573 void
4574 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4575 {
4576         struct sctpvtaghead *chain;
4577         struct sctp_tagblock *twait_block;
4578         struct timeval now;
4579         int set, i;
4580
4581         if (time == 0) {
4582                 /* Its disabled */
4583                 return;
4584         }
4585         (void)SCTP_GETTIME_TIMEVAL(&now);
4586         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4587         set = 0;
4588         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4589                 /* Block(s) present, lets find space, and expire on the fly */
4590                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4591                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4592                             !set) {
4593                                 twait_block->vtag_block[i].tv_sec_at_expire =
4594                                     now.tv_sec + time;
4595                                 twait_block->vtag_block[i].v_tag = tag;
4596                                 twait_block->vtag_block[i].lport = lport;
4597                                 twait_block->vtag_block[i].rport = rport;
4598                                 set = 1;
4599                         } else if ((twait_block->vtag_block[i].v_tag) &&
4600                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4601                                 /* Audit expires this guy */
4602                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4603                                 twait_block->vtag_block[i].v_tag = 0;
4604                                 twait_block->vtag_block[i].lport = 0;
4605                                 twait_block->vtag_block[i].rport = 0;
4606                                 if (set == 0) {
4607                                         /* Reuse it for my new tag */
4608                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4609                                         twait_block->vtag_block[i].v_tag = tag;
4610                                         twait_block->vtag_block[i].lport = lport;
4611                                         twait_block->vtag_block[i].rport = rport;
4612                                         set = 1;
4613                                 }
4614                         }
4615                 }
4616                 if (set) {
4617                         /*
4618                          * We only do up to the block where we can place our
4619                          * tag for audits
4620                          */
4621                         break;
4622                 }
4623         }
4624         /* Need to add a new block to chain */
4625         if (!set) {
4626                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4627                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4628                 if (twait_block == NULL) {
4629 #ifdef INVARIANTS
4630                         panic("Can not alloc tagblock");
4631 #endif
4632                         return;
4633                 }
4634                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4635                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4636                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4637                 twait_block->vtag_block[0].v_tag = tag;
4638                 twait_block->vtag_block[0].lport = lport;
4639                 twait_block->vtag_block[0].rport = rport;
4640         }
4641 }
4642
4643 void
4644 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4645 {
4646         struct sctp_tmit_chunk *chk, *nchk;
4647         struct sctp_queued_to_read *control, *ncontrol;
4648
4649         TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) {
4650                 TAILQ_REMOVE(rh, control, next_instrm);
4651                 control->on_strm_q = 0;
4652                 if (control->on_read_q == 0) {
4653                         sctp_free_remote_addr(control->whoFrom);
4654                         if (control->data) {
4655                                 sctp_m_freem(control->data);
4656                                 control->data = NULL;
4657                         }
4658                 }
4659                 /* Reassembly free? */
4660                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
4661                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
4662                         if (chk->data) {
4663                                 sctp_m_freem(chk->data);
4664                                 chk->data = NULL;
4665                         }
4666                         if (chk->holds_key_ref)
4667                                 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4668                         sctp_free_remote_addr(chk->whoTo);
4669                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4670                         SCTP_DECR_CHK_COUNT();
4671                         /* sa_ignore FREED_MEMORY */
4672                 }
4673                 /*
4674                  * We don't free the address here since all the net's were
4675                  * freed above.
4676                  */
4677                 if (control->on_read_q == 0) {
4678                         sctp_free_a_readq(stcb, control);
4679                 }
4680         }
4681 }
4682
4683
4684 /*-
4685  * Free the association after un-hashing the remote port. This
4686  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4687  * expect that the input to this function IS a locked TCB.
4688  * It will return 0, if it did NOT destroy the association (instead
4689  * it unlocks it. It will return NON-zero if it either destroyed the
4690  * association OR the association is already destroyed.
4691  */
4692 int
4693 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4694 {
4695         int i;
4696         struct sctp_association *asoc;
4697         struct sctp_nets *net, *nnet;
4698         struct sctp_laddr *laddr, *naddr;
4699         struct sctp_tmit_chunk *chk, *nchk;
4700         struct sctp_asconf_addr *aparam, *naparam;
4701         struct sctp_asconf_ack *aack, *naack;
4702         struct sctp_stream_reset_list *strrst, *nstrrst;
4703         struct sctp_queued_to_read *sq, *nsq;
4704         struct sctp_stream_queue_pending *sp, *nsp;
4705         sctp_sharedkey_t *shared_key, *nshared_key;
4706         struct socket *so;
4707
4708         /* first, lets purge the entry from the hash table. */
4709
4710 #ifdef SCTP_LOG_CLOSING
4711         sctp_log_closing(inp, stcb, 6);
4712 #endif
4713         if (stcb->asoc.state == 0) {
4714 #ifdef SCTP_LOG_CLOSING
4715                 sctp_log_closing(inp, NULL, 7);
4716 #endif
4717                 /* there is no asoc, really TSNH :-0 */
4718                 return (1);
4719         }
4720         if (stcb->asoc.alternate) {
4721                 sctp_free_remote_addr(stcb->asoc.alternate);
4722                 stcb->asoc.alternate = NULL;
4723         }
4724         /* TEMP CODE */
4725         if (stcb->freed_from_where == 0) {
4726                 /* Only record the first place free happened from */
4727                 stcb->freed_from_where = from_location;
4728         }
4729         /* TEMP CODE */
4730
4731         asoc = &stcb->asoc;
4732         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4733             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4734                 /* nothing around */
4735                 so = NULL;
4736         else
4737                 so = inp->sctp_socket;
4738
4739         /*
4740          * We used timer based freeing if a reader or writer is in the way.
4741          * So we first check if we are actually being called from a timer,
4742          * if so we abort early if a reader or writer is still in the way.
4743          */
4744         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4745             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4746                 /*
4747                  * is it the timer driving us? if so are the reader/writers
4748                  * gone?
4749                  */
4750                 if (stcb->asoc.refcnt) {
4751                         /* nope, reader or writer in the way */
4752                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4753                         /* no asoc destroyed */
4754                         SCTP_TCB_UNLOCK(stcb);
4755 #ifdef SCTP_LOG_CLOSING
4756                         sctp_log_closing(inp, stcb, 8);
4757 #endif
4758                         return (0);
4759                 }
4760         }
4761         /* now clean up any other timers */
4762         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4763         asoc->dack_timer.self = NULL;
4764         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4765         /*-
4766          * For stream reset we don't blast this unless
4767          * it is a str-reset timer, it might be the
4768          * free-asoc timer which we DON'T want to
4769          * disturb.
4770          */
4771         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4772                 asoc->strreset_timer.self = NULL;
4773         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4774         asoc->asconf_timer.self = NULL;
4775         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4776         asoc->autoclose_timer.self = NULL;
4777         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4778         asoc->shut_guard_timer.self = NULL;
4779         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4780         asoc->delayed_event_timer.self = NULL;
4781         /* Mobility adaptation */
4782         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4783         asoc->delete_prim_timer.self = NULL;
4784         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4785                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4786                 net->rxt_timer.self = NULL;
4787                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4788                 net->pmtu_timer.self = NULL;
4789                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4790                 net->hb_timer.self = NULL;
4791         }
4792         /* Now the read queue needs to be cleaned up (only once) */
4793         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4794                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4795                 SCTP_INP_READ_LOCK(inp);
4796                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4797                         if (sq->stcb == stcb) {
4798                                 sq->do_not_ref_stcb = 1;
4799                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4800                                 /*
4801                                  * If there is no end, there never will be
4802                                  * now.
4803                                  */
4804                                 if (sq->end_added == 0) {
4805                                         /* Held for PD-API clear that. */
4806                                         sq->pdapi_aborted = 1;
4807                                         sq->held_length = 0;
4808                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4809                                                 /*
4810                                                  * Need to add a PD-API
4811                                                  * aborted indication.
4812                                                  * Setting the control_pdapi
4813                                                  * assures that it will be
4814                                                  * added right after this
4815                                                  * msg.
4816                                                  */
4817                                                 uint32_t strseq;
4818
4819                                                 stcb->asoc.control_pdapi = sq;
4820                                                 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff);
4821                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4822                                                     stcb,
4823                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4824                                                     (void *)&strseq,
4825                                                     SCTP_SO_LOCKED);
4826                                                 stcb->asoc.control_pdapi = NULL;
4827                                         }
4828                                 }
4829                                 /* Add an end to wake them */
4830                                 sq->end_added = 1;
4831                         }
4832                 }
4833                 SCTP_INP_READ_UNLOCK(inp);
4834                 if (stcb->block_entry) {
4835                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4836                         stcb->block_entry->error = ECONNRESET;
4837                         stcb->block_entry = NULL;
4838                 }
4839         }
4840         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4841                 /*
4842                  * Someone holds a reference OR the socket is unaccepted
4843                  * yet.
4844                  */
4845                 if ((stcb->asoc.refcnt) ||
4846                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4847                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4848                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4849                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4850                 }
4851                 SCTP_TCB_UNLOCK(stcb);
4852                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4853                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4854                         /* nothing around */
4855                         so = NULL;
4856                 if (so) {
4857                         /* Wake any reader/writers */
4858                         sctp_sorwakeup(inp, so);
4859                         sctp_sowwakeup(inp, so);
4860                 }
4861 #ifdef SCTP_LOG_CLOSING
4862                 sctp_log_closing(inp, stcb, 9);
4863 #endif
4864                 /* no asoc destroyed */
4865                 return (0);
4866         }
4867 #ifdef SCTP_LOG_CLOSING
4868         sctp_log_closing(inp, stcb, 10);
4869 #endif
4870         /*
4871          * When I reach here, no others want to kill the assoc yet.. and I
4872          * own the lock. Now its possible an abort comes in when I do the
4873          * lock exchange below to grab all the locks to do the final take
4874          * out. to prevent this we increment the count, which will start a
4875          * timer and blow out above thus assuring us that we hold exclusive
4876          * killing of the asoc. Note that after getting back the TCB lock we
4877          * will go ahead and increment the counter back up and stop any
4878          * timer a passing stranger may have started :-S
4879          */
4880         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4881                 atomic_add_int(&stcb->asoc.refcnt, 1);
4882
4883                 SCTP_TCB_UNLOCK(stcb);
4884                 SCTP_INP_INFO_WLOCK();
4885                 SCTP_INP_WLOCK(inp);
4886                 SCTP_TCB_LOCK(stcb);
4887         }
4888         /* Double check the GONE flag */
4889         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4890             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4891                 /* nothing around */
4892                 so = NULL;
4893
4894         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4895             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4896                 /*
4897                  * For TCP type we need special handling when we are
4898                  * connected. We also include the peel'ed off ones to.
4899                  */
4900                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4901                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4902                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4903                         if (so) {
4904                                 SOCK_LOCK(so);
4905                                 if (so->so_rcv.sb_cc == 0) {
4906                                         so->so_state &= ~(SS_ISCONNECTING |
4907                                             SS_ISDISCONNECTING |
4908                                             SS_ISCONFIRMING |
4909                                             SS_ISCONNECTED);
4910                                 }
4911                                 socantrcvmore_locked(so);
4912                                 socantsendmore(so);
4913                                 sctp_sowwakeup(inp, so);
4914                                 sctp_sorwakeup(inp, so);
4915                                 SCTP_SOWAKEUP(so);
4916                         }
4917                 }
4918         }
4919         /*
4920          * Make it invalid too, that way if its about to run it will abort
4921          * and return.
4922          */
4923         /* re-increment the lock */
4924         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4925                 atomic_add_int(&stcb->asoc.refcnt, -1);
4926         }
4927         if (stcb->asoc.refcnt) {
4928                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4929                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4930                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4931                         SCTP_INP_INFO_WUNLOCK();
4932                         SCTP_INP_WUNLOCK(inp);
4933                 }
4934                 SCTP_TCB_UNLOCK(stcb);
4935                 return (0);
4936         }
4937         asoc->state = 0;
4938         if (inp->sctp_tcbhash) {
4939                 LIST_REMOVE(stcb, sctp_tcbhash);
4940         }
4941         if (stcb->asoc.in_asocid_hash) {
4942                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4943         }
4944         /* Now lets remove it from the list of ALL associations in the EP */
4945         LIST_REMOVE(stcb, sctp_tcblist);
4946         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4947                 SCTP_INP_INCR_REF(inp);
4948                 SCTP_INP_WUNLOCK(inp);
4949         }
4950         /* pull from vtag hash */
4951         LIST_REMOVE(stcb, sctp_asocs);
4952         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4953             inp->sctp_lport, stcb->rport);
4954
4955         /*
4956          * Now restop the timers to be sure this is paranoia at is finest!
4957          */
4958         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4959         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4960         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4961         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4962         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4963         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4964         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4965         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4966                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4967                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4968                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4969         }
4970
4971         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4972         /*
4973          * The chunk lists and such SHOULD be empty but we check them just
4974          * in case.
4975          */
4976         /* anything on the wheel needs to be removed */
4977         for (i = 0; i < asoc->streamoutcnt; i++) {
4978                 struct sctp_stream_out *outs;
4979
4980                 outs = &asoc->strmout[i];
4981                 /* now clean up any chunks here */
4982                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4983                         atomic_subtract_int(&asoc->stream_queue_cnt, 1);
4984                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4985                         stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 0);
4986                         sctp_free_spbufspace(stcb, asoc, sp);
4987                         if (sp->data) {
4988                                 if (so) {
4989                                         /* Still an open socket - report */
4990                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4991                                             0, (void *)sp, SCTP_SO_LOCKED);
4992                                 }
4993                                 if (sp->data) {
4994                                         sctp_m_freem(sp->data);
4995                                         sp->data = NULL;
4996                                         sp->tail_mbuf = NULL;
4997                                         sp->length = 0;
4998                                 }
4999                         }
5000                         if (sp->net) {
5001                                 sctp_free_remote_addr(sp->net);
5002                                 sp->net = NULL;
5003                         }
5004                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
5005                 }
5006         }
5007         /* sa_ignore FREED_MEMORY */
5008         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
5009                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
5010                 SCTP_FREE(strrst, SCTP_M_STRESET);
5011         }
5012         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
5013                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
5014                 if (sq->data) {
5015                         sctp_m_freem(sq->data);
5016                         sq->data = NULL;
5017                 }
5018                 sctp_free_remote_addr(sq->whoFrom);
5019                 sq->whoFrom = NULL;
5020                 sq->stcb = NULL;
5021                 /* Free the ctl entry */
5022                 sctp_free_a_readq(stcb, sq);
5023                 /* sa_ignore FREED_MEMORY */
5024         }
5025         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
5026                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
5027                 if (chk->data) {
5028                         sctp_m_freem(chk->data);
5029                         chk->data = NULL;
5030                 }
5031                 if (chk->holds_key_ref)
5032                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5033                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5034                 SCTP_DECR_CHK_COUNT();
5035                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
5036                 asoc->free_chunk_cnt--;
5037                 /* sa_ignore FREED_MEMORY */
5038         }
5039         /* pending send queue SHOULD be empty */
5040         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5041                 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5042                         asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5043 #ifdef INVARIANTS
5044                 } else {
5045                         panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5046 #endif
5047                 }
5048                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5049                 if (chk->data) {
5050                         if (so) {
5051                                 /* Still a socket? */
5052                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5053                                     0, chk, SCTP_SO_LOCKED);
5054                         }
5055                         if (chk->data) {
5056                                 sctp_m_freem(chk->data);
5057                                 chk->data = NULL;
5058                         }
5059                 }
5060                 if (chk->holds_key_ref)
5061                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5062                 if (chk->whoTo) {
5063                         sctp_free_remote_addr(chk->whoTo);
5064                         chk->whoTo = NULL;
5065                 }
5066                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5067                 SCTP_DECR_CHK_COUNT();
5068                 /* sa_ignore FREED_MEMORY */
5069         }
5070         /* sent queue SHOULD be empty */
5071         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5072                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5073                         if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5074                                 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5075 #ifdef INVARIANTS
5076                         } else {
5077                                 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5078 #endif
5079                         }
5080                 }
5081                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5082                 if (chk->data) {
5083                         if (so) {
5084                                 /* Still a socket? */
5085                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5086                                     0, chk, SCTP_SO_LOCKED);
5087                         }
5088                         if (chk->data) {
5089                                 sctp_m_freem(chk->data);
5090                                 chk->data = NULL;
5091                         }
5092                 }
5093                 if (chk->holds_key_ref)
5094                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5095                 sctp_free_remote_addr(chk->whoTo);
5096                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5097                 SCTP_DECR_CHK_COUNT();
5098                 /* sa_ignore FREED_MEMORY */
5099         }
5100 #ifdef INVARIANTS
5101         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5102                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5103                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5104                 }
5105         }
5106 #endif
5107         /* control queue MAY not be empty */
5108         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5109                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5110                 if (chk->data) {
5111                         sctp_m_freem(chk->data);
5112                         chk->data = NULL;
5113                 }
5114                 if (chk->holds_key_ref)
5115                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5116                 sctp_free_remote_addr(chk->whoTo);
5117                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5118                 SCTP_DECR_CHK_COUNT();
5119                 /* sa_ignore FREED_MEMORY */
5120         }
5121         /* ASCONF queue MAY not be empty */
5122         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5123                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5124                 if (chk->data) {
5125                         sctp_m_freem(chk->data);
5126                         chk->data = NULL;
5127                 }
5128                 if (chk->holds_key_ref)
5129                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5130                 sctp_free_remote_addr(chk->whoTo);
5131                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5132                 SCTP_DECR_CHK_COUNT();
5133                 /* sa_ignore FREED_MEMORY */
5134         }
5135         if (asoc->mapping_array) {
5136                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5137                 asoc->mapping_array = NULL;
5138         }
5139         if (asoc->nr_mapping_array) {
5140                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5141                 asoc->nr_mapping_array = NULL;
5142         }
5143         /* the stream outs */
5144         if (asoc->strmout) {
5145                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5146                 asoc->strmout = NULL;
5147         }
5148         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5149         if (asoc->strmin) {
5150                 for (i = 0; i < asoc->streamincnt; i++) {
5151                         sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5152                         sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5153                 }
5154                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5155                 asoc->strmin = NULL;
5156         }
5157         asoc->streamincnt = 0;
5158         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5159 #ifdef INVARIANTS
5160                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5161                         panic("no net's left alloc'ed, or list points to itself");
5162                 }
5163 #endif
5164                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5165                 sctp_free_remote_addr(net);
5166         }
5167         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5168                 /* sa_ignore FREED_MEMORY */
5169                 sctp_remove_laddr(laddr);
5170         }
5171
5172         /* pending asconf (address) parameters */
5173         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5174                 /* sa_ignore FREED_MEMORY */
5175                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5176                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5177         }
5178         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5179                 /* sa_ignore FREED_MEMORY */
5180                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5181                 if (aack->data != NULL) {
5182                         sctp_m_freem(aack->data);
5183                 }
5184                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5185         }
5186         /* clean up auth stuff */
5187         if (asoc->local_hmacs)
5188                 sctp_free_hmaclist(asoc->local_hmacs);
5189         if (asoc->peer_hmacs)
5190                 sctp_free_hmaclist(asoc->peer_hmacs);
5191
5192         if (asoc->local_auth_chunks)
5193                 sctp_free_chunklist(asoc->local_auth_chunks);
5194         if (asoc->peer_auth_chunks)
5195                 sctp_free_chunklist(asoc->peer_auth_chunks);
5196
5197         sctp_free_authinfo(&asoc->authinfo);
5198
5199         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5200                 LIST_REMOVE(shared_key, next);
5201                 sctp_free_sharedkey(shared_key);
5202                 /* sa_ignore FREED_MEMORY */
5203         }
5204
5205         /* Insert new items here :> */
5206
5207         /* Get rid of LOCK */
5208         SCTP_TCB_UNLOCK(stcb);
5209         SCTP_TCB_LOCK_DESTROY(stcb);
5210         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5211         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5212                 SCTP_INP_INFO_WUNLOCK();
5213                 SCTP_INP_RLOCK(inp);
5214         }
5215 #ifdef SCTP_TRACK_FREED_ASOCS
5216         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5217                 /* now clean up the tasoc itself */
5218                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5219                 SCTP_DECR_ASOC_COUNT();
5220         } else {
5221                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5222         }
5223 #else
5224         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5225         SCTP_DECR_ASOC_COUNT();
5226 #endif
5227         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5228                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5229                         /*
5230                          * If its NOT the inp_free calling us AND sctp_close
5231                          * as been called, we call back...
5232                          */
5233                         SCTP_INP_RUNLOCK(inp);
5234                         /*
5235                          * This will start the kill timer (if we are the
5236                          * last one) since we hold an increment yet. But
5237                          * this is the only safe way to do this since
5238                          * otherwise if the socket closes at the same time
5239                          * we are here we might collide in the cleanup.
5240                          */
5241                         sctp_inpcb_free(inp,
5242                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5243                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5244                         SCTP_INP_DECR_REF(inp);
5245                         goto out_of;
5246                 } else {
5247                         /* The socket is still open. */
5248                         SCTP_INP_DECR_REF(inp);
5249                 }
5250         }
5251         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5252                 SCTP_INP_RUNLOCK(inp);
5253         }
5254 out_of:
5255         /* destroyed the asoc */
5256 #ifdef SCTP_LOG_CLOSING
5257         sctp_log_closing(inp, NULL, 11);
5258 #endif
5259         return (1);
5260 }
5261
5262
5263
5264 /*
5265  * determine if a destination is "reachable" based upon the addresses bound
5266  * to the current endpoint (e.g. only v4 or v6 currently bound)
5267  */
5268 /*
5269  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5270  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5271  * types bound as its endpoint
5272  */
5273 int
5274 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5275 {
5276         struct sctp_inpcb *inp;
5277         int answer;
5278
5279         /*
5280          * No locks here, the TCB, in all cases is already locked and an
5281          * assoc is up. There is either a INP lock by the caller applied (in
5282          * asconf case when deleting an address) or NOT in the HB case,
5283          * however if HB then the INP increment is up and the INP will not
5284          * be removed (on top of the fact that we have a TCB lock). So we
5285          * only want to read the sctp_flags, which is either bound-all or
5286          * not.. no protection needed since once an assoc is up you can't be
5287          * changing your binding.
5288          */
5289         inp = stcb->sctp_ep;
5290         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5291                 /* if bound all, destination is not restricted */
5292                 /*
5293                  * RRS: Question during lock work: Is this correct? If you
5294                  * are bound-all you still might need to obey the V4--V6
5295                  * flags??? IMO this bound-all stuff needs to be removed!
5296                  */
5297                 return (1);
5298         }
5299         /* NOTE: all "scope" checks are done when local addresses are added */
5300         switch (destaddr->sa_family) {
5301 #ifdef INET6
5302         case AF_INET6:
5303                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5304                 break;
5305 #endif
5306 #ifdef INET
5307         case AF_INET:
5308                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5309                 break;
5310 #endif
5311         default:
5312                 /* invalid family, so it's unreachable */
5313                 answer = 0;
5314                 break;
5315         }
5316         return (answer);
5317 }
5318
5319 /*
5320  * update the inp_vflags on an endpoint
5321  */
5322 static void
5323 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5324 {
5325         struct sctp_laddr *laddr;
5326
5327         /* first clear the flag */
5328         inp->ip_inp.inp.inp_vflag = 0;
5329         /* set the flag based on addresses on the ep list */
5330         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5331                 if (laddr->ifa == NULL) {
5332                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5333                             __func__);
5334                         continue;
5335                 }
5336                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5337                         continue;
5338                 }
5339                 switch (laddr->ifa->address.sa.sa_family) {
5340 #ifdef INET6
5341                 case AF_INET6:
5342                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5343                         break;
5344 #endif
5345 #ifdef INET
5346                 case AF_INET:
5347                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5348                         break;
5349 #endif
5350                 default:
5351                         break;
5352                 }
5353         }
5354 }
5355
5356 /*
5357  * Add the address to the endpoint local address list There is nothing to be
5358  * done if we are bound to all addresses
5359  */
5360 void
5361 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5362 {
5363         struct sctp_laddr *laddr;
5364         struct sctp_tcb *stcb;
5365         int fnd, error = 0;
5366
5367         fnd = 0;
5368
5369         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5370                 /* You are already bound to all. You have it already */
5371                 return;
5372         }
5373 #ifdef INET6
5374         if (ifa->address.sa.sa_family == AF_INET6) {
5375                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5376                         /* Can't bind a non-useable addr. */
5377                         return;
5378                 }
5379         }
5380 #endif
5381         /* first, is it already present? */
5382         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5383                 if (laddr->ifa == ifa) {
5384                         fnd = 1;
5385                         break;
5386                 }
5387         }
5388
5389         if (fnd == 0) {
5390                 /* Not in the ep list */
5391                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5392                 if (error != 0)
5393                         return;
5394                 inp->laddr_count++;
5395                 /* update inp_vflag flags */
5396                 switch (ifa->address.sa.sa_family) {
5397 #ifdef INET6
5398                 case AF_INET6:
5399                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5400                         break;
5401 #endif
5402 #ifdef INET
5403                 case AF_INET:
5404                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5405                         break;
5406 #endif
5407                 default:
5408                         break;
5409                 }
5410                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5411                         sctp_add_local_addr_restricted(stcb, ifa);
5412                 }
5413         }
5414         return;
5415 }
5416
5417
5418 /*
5419  * select a new (hopefully reachable) destination net (should only be used
5420  * when we deleted an ep addr that is the only usable source address to reach
5421  * the destination net)
5422  */
5423 static void
5424 sctp_select_primary_destination(struct sctp_tcb *stcb)
5425 {
5426         struct sctp_nets *net;
5427
5428         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5429                 /* for now, we'll just pick the first reachable one we find */
5430                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5431                         continue;
5432                 if (sctp_destination_is_reachable(stcb,
5433                     (struct sockaddr *)&net->ro._l_addr)) {
5434                         /* found a reachable destination */
5435                         stcb->asoc.primary_destination = net;
5436                 }
5437         }
5438         /* I can't there from here! ...we're gonna die shortly... */
5439 }
5440
5441
5442 /*
5443  * Delete the address from the endpoint local address list. There is nothing
5444  * to be done if we are bound to all addresses
5445  */
5446 void
5447 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5448 {
5449         struct sctp_laddr *laddr;
5450         int fnd;
5451
5452         fnd = 0;
5453         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5454                 /* You are already bound to all. You have it already */
5455                 return;
5456         }
5457         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5458                 if (laddr->ifa == ifa) {
5459                         fnd = 1;
5460                         break;
5461                 }
5462         }
5463         if (fnd && (inp->laddr_count < 2)) {
5464                 /* can't delete unless there are at LEAST 2 addresses */
5465                 return;
5466         }
5467         if (fnd) {
5468                 /*
5469                  * clean up any use of this address go through our
5470                  * associations and clear any last_used_address that match
5471                  * this one for each assoc, see if a new primary_destination
5472                  * is needed
5473                  */
5474                 struct sctp_tcb *stcb;
5475
5476                 /* clean up "next_addr_touse" */
5477                 if (inp->next_addr_touse == laddr)
5478                         /* delete this address */
5479                         inp->next_addr_touse = NULL;
5480
5481                 /* clean up "last_used_address" */
5482                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5483                         struct sctp_nets *net;
5484
5485                         SCTP_TCB_LOCK(stcb);
5486                         if (stcb->asoc.last_used_address == laddr)
5487                                 /* delete this address */
5488                                 stcb->asoc.last_used_address = NULL;
5489                         /*
5490                          * Now spin through all the nets and purge any ref
5491                          * to laddr
5492                          */
5493                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5494                                 if (net->ro._s_addr == laddr->ifa) {
5495                                         /* Yep, purge src address selected */
5496                                         sctp_rtentry_t *rt;
5497
5498                                         /* delete this address if cached */
5499                                         rt = net->ro.ro_rt;
5500                                         if (rt != NULL) {
5501                                                 RTFREE(rt);
5502                                                 net->ro.ro_rt = NULL;
5503                                         }
5504                                         sctp_free_ifa(net->ro._s_addr);
5505                                         net->ro._s_addr = NULL;
5506                                         net->src_addr_selected = 0;
5507                                 }
5508                         }
5509                         SCTP_TCB_UNLOCK(stcb);
5510                 }               /* for each tcb */
5511                 /* remove it from the ep list */
5512                 sctp_remove_laddr(laddr);
5513                 inp->laddr_count--;
5514                 /* update inp_vflag flags */
5515                 sctp_update_ep_vflag(inp);
5516         }
5517         return;
5518 }
5519
5520 /*
5521  * Add the address to the TCB local address restricted list.
5522  * This is a "pending" address list (eg. addresses waiting for an
5523  * ASCONF-ACK response) and cannot be used as a valid source address.
5524  */
5525 void
5526 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5527 {
5528         struct sctp_laddr *laddr;
5529         struct sctpladdr *list;
5530
5531         /*
5532          * Assumes TCB is locked.. and possibly the INP. May need to
5533          * confirm/fix that if we need it and is not the case.
5534          */
5535         list = &stcb->asoc.sctp_restricted_addrs;
5536
5537 #ifdef INET6
5538         if (ifa->address.sa.sa_family == AF_INET6) {
5539                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5540                         /* Can't bind a non-existent addr. */
5541                         return;
5542                 }
5543         }
5544 #endif
5545         /* does the address already exist? */
5546         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5547                 if (laddr->ifa == ifa) {
5548                         return;
5549                 }
5550         }
5551
5552         /* add to the list */
5553         (void)sctp_insert_laddr(list, ifa, 0);
5554         return;
5555 }
5556
5557 /*
5558  * Remove a local address from the TCB local address restricted list
5559  */
5560 void
5561 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5562 {
5563         struct sctp_inpcb *inp;
5564         struct sctp_laddr *laddr;
5565
5566         /*
5567          * This is called by asconf work. It is assumed that a) The TCB is
5568          * locked and b) The INP is locked. This is true in as much as I can
5569          * trace through the entry asconf code where I did these locks.
5570          * Again, the ASCONF code is a bit different in that it does lock
5571          * the INP during its work often times. This must be since we don't
5572          * want other proc's looking up things while what they are looking
5573          * up is changing :-D
5574          */
5575
5576         inp = stcb->sctp_ep;
5577         /* if subset bound and don't allow ASCONF's, can't delete last */
5578         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5579             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5580                 if (stcb->sctp_ep->laddr_count < 2) {
5581                         /* can't delete last address */
5582                         return;
5583                 }
5584         }
5585         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5586                 /* remove the address if it exists */
5587                 if (laddr->ifa == NULL)
5588                         continue;
5589                 if (laddr->ifa == ifa) {
5590                         sctp_remove_laddr(laddr);
5591                         return;
5592                 }
5593         }
5594
5595         /* address not found! */
5596         return;
5597 }
5598
5599 /*
5600  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5601  */
5602 /* sysctl */
5603 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5604 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5605
5606
5607
5608 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5609 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5610 int *sctp_cpuarry = NULL;
5611 void
5612 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5613 {
5614         /* Queue a packet to a processor for the specified core */
5615         struct sctp_mcore_queue *qent;
5616         struct sctp_mcore_ctrl *wkq;
5617         int need_wake = 0;
5618
5619         if (sctp_mcore_workers == NULL) {
5620                 /* Something went way bad during setup */
5621                 sctp_input_with_port(m, off, 0);
5622                 return;
5623         }
5624         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5625             (sizeof(struct sctp_mcore_queue)),
5626             SCTP_M_MCORE);
5627         if (qent == NULL) {
5628                 /* This is trouble  */
5629                 sctp_input_with_port(m, off, 0);
5630                 return;
5631         }
5632         qent->vn = curvnet;
5633         qent->m = m;
5634         qent->off = off;
5635         qent->v6 = 0;
5636         wkq = &sctp_mcore_workers[cpu_to_use];
5637         SCTP_MCORE_QLOCK(wkq);
5638
5639         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5640         if (wkq->running == 0) {
5641                 need_wake = 1;
5642         }
5643         SCTP_MCORE_QUNLOCK(wkq);
5644         if (need_wake) {
5645                 wakeup(&wkq->running);
5646         }
5647 }
5648
5649 static void
5650 sctp_mcore_thread(void *arg)
5651 {
5652
5653         struct sctp_mcore_ctrl *wkq;
5654         struct sctp_mcore_queue *qent;
5655
5656         wkq = (struct sctp_mcore_ctrl *)arg;
5657         struct mbuf *m;
5658         int off, v6;
5659
5660         /* Wait for first tickle */
5661         SCTP_MCORE_LOCK(wkq);
5662         wkq->running = 0;
5663         msleep(&wkq->running,
5664             &wkq->core_mtx,
5665             0, "wait for pkt", 0);
5666         SCTP_MCORE_UNLOCK(wkq);
5667
5668         /* Bind to our cpu */
5669         thread_lock(curthread);
5670         sched_bind(curthread, wkq->cpuid);
5671         thread_unlock(curthread);
5672
5673         /* Now lets start working */
5674         SCTP_MCORE_LOCK(wkq);
5675         /* Now grab lock and go */
5676         for (;;) {
5677                 SCTP_MCORE_QLOCK(wkq);
5678 skip_sleep:
5679                 wkq->running = 1;
5680                 qent = TAILQ_FIRST(&wkq->que);
5681                 if (qent) {
5682                         TAILQ_REMOVE(&wkq->que, qent, next);
5683                         SCTP_MCORE_QUNLOCK(wkq);
5684                         CURVNET_SET(qent->vn);
5685                         m = qent->m;
5686                         off = qent->off;
5687                         v6 = qent->v6;
5688                         SCTP_FREE(qent, SCTP_M_MCORE);
5689                         if (v6 == 0) {
5690                                 sctp_input_with_port(m, off, 0);
5691                         } else {
5692                                 SCTP_PRINTF("V6 not yet supported\n");
5693                                 sctp_m_freem(m);
5694                         }
5695                         CURVNET_RESTORE();
5696                         SCTP_MCORE_QLOCK(wkq);
5697                 }
5698                 wkq->running = 0;
5699                 if (!TAILQ_EMPTY(&wkq->que)) {
5700                         goto skip_sleep;
5701                 }
5702                 SCTP_MCORE_QUNLOCK(wkq);
5703                 msleep(&wkq->running,
5704                     &wkq->core_mtx,
5705                     0, "wait for pkt", 0);
5706         }
5707 }
5708
5709 static void
5710 sctp_startup_mcore_threads(void)
5711 {
5712         int i, cpu;
5713
5714         if (mp_ncpus == 1)
5715                 return;
5716
5717         if (sctp_mcore_workers != NULL) {
5718                 /*
5719                  * Already been here in some previous vnet?
5720                  */
5721                 return;
5722         }
5723         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5724             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5725             SCTP_M_MCORE);
5726         if (sctp_mcore_workers == NULL) {
5727                 /* TSNH I hope */
5728                 return;
5729         }
5730         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5731             sizeof(struct sctp_mcore_ctrl)));
5732         /* Init the structures */
5733         for (i = 0; i <= mp_maxid; i++) {
5734                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5735                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5736                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5737                 sctp_mcore_workers[i].cpuid = i;
5738         }
5739         if (sctp_cpuarry == NULL) {
5740                 SCTP_MALLOC(sctp_cpuarry, int *,
5741                     (mp_ncpus * sizeof(int)),
5742                     SCTP_M_MCORE);
5743                 i = 0;
5744                 CPU_FOREACH(cpu) {
5745                         sctp_cpuarry[i] = cpu;
5746                         i++;
5747                 }
5748         }
5749         /* Now start them all */
5750         CPU_FOREACH(cpu) {
5751                 (void)kproc_create(sctp_mcore_thread,
5752                     (void *)&sctp_mcore_workers[cpu],
5753                     &sctp_mcore_workers[cpu].thread_proc,
5754                     RFPROC,
5755                     SCTP_KTHREAD_PAGES,
5756                     SCTP_MCORE_NAME);
5757
5758         }
5759 }
5760 #endif
5761
5762 void
5763 sctp_pcb_init()
5764 {
5765         /*
5766          * SCTP initialization for the PCB structures should be called by
5767          * the sctp_init() function.
5768          */
5769         int i;
5770         struct timeval tv;
5771
5772         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5773                 /* error I was called twice */
5774                 return;
5775         }
5776         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5777
5778 #if defined(SCTP_LOCAL_TRACE_BUF)
5779         memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log));
5780 #endif
5781 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5782         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5783             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5784             SCTP_M_MCORE);
5785 #endif
5786         (void)SCTP_GETTIME_TIMEVAL(&tv);
5787 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5788         memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1));
5789         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
5790         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
5791 #else
5792         memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat));
5793         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
5794         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
5795 #endif
5796         /* init the empty list of (All) Endpoints */
5797         LIST_INIT(&SCTP_BASE_INFO(listhead));
5798
5799
5800         /* init the hash table of endpoints */
5801         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5802         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5803         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5804         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5805             &SCTP_BASE_INFO(hashasocmark));
5806         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5807             &SCTP_BASE_INFO(hashmark));
5808         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5809             &SCTP_BASE_INFO(hashtcpmark));
5810         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5811
5812
5813         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5814             &SCTP_BASE_INFO(hashvrfmark));
5815
5816         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5817             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5818         /* init the zones */
5819         /*
5820          * FIX ME: Should check for NULL returns, but if it does fail we are
5821          * doomed to panic anyways... add later maybe.
5822          */
5823         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5824             sizeof(struct sctp_inpcb), maxsockets);
5825
5826         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5827             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5828
5829         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5830             sizeof(struct sctp_laddr),
5831             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5832
5833         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5834             sizeof(struct sctp_nets),
5835             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5836
5837         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5838             sizeof(struct sctp_tmit_chunk),
5839             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5840
5841         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5842             sizeof(struct sctp_queued_to_read),
5843             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5844
5845         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5846             sizeof(struct sctp_stream_queue_pending),
5847             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5848
5849         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5850             sizeof(struct sctp_asconf),
5851             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5852
5853         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5854             sizeof(struct sctp_asconf_ack),
5855             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5856
5857
5858         /* Master Lock INIT for info structure */
5859         SCTP_INP_INFO_LOCK_INIT();
5860         SCTP_STATLOG_INIT_LOCK();
5861
5862         SCTP_IPI_COUNT_INIT();
5863         SCTP_IPI_ADDR_INIT();
5864 #ifdef SCTP_PACKET_LOGGING
5865         SCTP_IP_PKTLOG_INIT();
5866 #endif
5867         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5868
5869         SCTP_WQ_ADDR_INIT();
5870         /* not sure if we need all the counts */
5871         SCTP_BASE_INFO(ipi_count_ep) = 0;
5872         /* assoc/tcb zone info */
5873         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5874         /* local addrlist zone info */
5875         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5876         /* remote addrlist zone info */
5877         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5878         /* chunk info */
5879         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5880
5881         /* socket queue zone info */
5882         SCTP_BASE_INFO(ipi_count_readq) = 0;
5883
5884         /* stream out queue cont */
5885         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5886
5887         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5888         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5889
5890         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5891
5892         /* Init the TIMEWAIT list */
5893         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5894                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5895         }
5896         sctp_startup_iterator();
5897
5898 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5899         sctp_startup_mcore_threads();
5900 #endif
5901
5902         /*
5903          * INIT the default VRF which for BSD is the only one, other O/S's
5904          * may have more. But initially they must start with one and then
5905          * add the VRF's as addresses are added.
5906          */
5907         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5908 }
5909
5910 /*
5911  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5912  */
5913 void
5914 sctp_pcb_finish(void)
5915 {
5916         struct sctp_vrflist *vrf_bucket;
5917         struct sctp_vrf *vrf, *nvrf;
5918         struct sctp_ifn *ifn, *nifn;
5919         struct sctp_ifa *ifa, *nifa;
5920         struct sctpvtaghead *chain;
5921         struct sctp_tagblock *twait_block, *prev_twait_block;
5922         struct sctp_laddr *wi, *nwi;
5923         int i;
5924         struct sctp_iterator *it, *nit;
5925
5926         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5927                 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5928                 return;
5929         }
5930         SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5931         /*
5932          * In FreeBSD the iterator thread never exits but we do clean up.
5933          * The only way FreeBSD reaches here is if we have VRF's but we
5934          * still add the ifdef to make it compile on old versions.
5935          */
5936 retry:
5937         SCTP_IPI_ITERATOR_WQ_LOCK();
5938         /*
5939          * sctp_iterator_worker() might be working on an it entry without
5940          * holding the lock.  We won't find it on the list either and
5941          * continue and free/destroy it.  While holding the lock, spin, to
5942          * avoid the race condition as sctp_iterator_worker() will have to
5943          * wait to re-aquire the lock.
5944          */
5945         if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5946                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5947                 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5948                     "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5949                 DELAY(10);
5950                 goto retry;
5951         }
5952         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5953                 if (it->vn != curvnet) {
5954                         continue;
5955                 }
5956                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5957                 if (it->function_atend != NULL) {
5958                         (*it->function_atend) (it->pointer, it->val);
5959                 }
5960                 SCTP_FREE(it, SCTP_M_ITER);
5961         }
5962         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5963         SCTP_ITERATOR_LOCK();
5964         if ((sctp_it_ctl.cur_it) &&
5965             (sctp_it_ctl.cur_it->vn == curvnet)) {
5966                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5967         }
5968         SCTP_ITERATOR_UNLOCK();
5969         SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5970         SCTP_WQ_ADDR_LOCK();
5971         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5972                 LIST_REMOVE(wi, sctp_nxt_addr);
5973                 SCTP_DECR_LADDR_COUNT();
5974                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5975                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
5976                 }
5977                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5978         }
5979         SCTP_WQ_ADDR_UNLOCK();
5980
5981         /*
5982          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5983          * destroyed first).
5984          */
5985         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5986         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5987                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5988                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5989                                 /* free the ifa */
5990                                 LIST_REMOVE(ifa, next_bucket);
5991                                 LIST_REMOVE(ifa, next_ifa);
5992                                 SCTP_FREE(ifa, SCTP_M_IFA);
5993                         }
5994                         /* free the ifn */
5995                         LIST_REMOVE(ifn, next_bucket);
5996                         LIST_REMOVE(ifn, next_ifn);
5997                         SCTP_FREE(ifn, SCTP_M_IFN);
5998                 }
5999                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
6000                 /* free the vrf */
6001                 LIST_REMOVE(vrf, next_vrf);
6002                 SCTP_FREE(vrf, SCTP_M_VRF);
6003         }
6004         /* free the vrf hashes */
6005         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
6006         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
6007
6008         /*
6009          * free the TIMEWAIT list elements malloc'd in the function
6010          * sctp_add_vtag_to_timewait()...
6011          */
6012         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6013                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
6014                 if (!LIST_EMPTY(chain)) {
6015                         prev_twait_block = NULL;
6016                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6017                                 if (prev_twait_block) {
6018                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6019                                 }
6020                                 prev_twait_block = twait_block;
6021                         }
6022                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6023                 }
6024         }
6025
6026         /* free the locks and mutexes */
6027 #ifdef SCTP_PACKET_LOGGING
6028         SCTP_IP_PKTLOG_DESTROY();
6029 #endif
6030         SCTP_IPI_ADDR_DESTROY();
6031         SCTP_STATLOG_DESTROY();
6032         SCTP_INP_INFO_LOCK_DESTROY();
6033
6034         SCTP_WQ_ADDR_DESTROY();
6035
6036         /* Get rid of other stuff too. */
6037         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6038                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6039         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6040                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6041         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6042                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6043
6044         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6045         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6046         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6047         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6048         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6049         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6050         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6051         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6052         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6053 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6054         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6055 #endif
6056 }
6057
6058
6059 int
6060 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6061     int offset, int limit,
6062     struct sockaddr *src, struct sockaddr *dst,
6063     struct sockaddr *altsa, uint16_t port)
6064 {
6065         /*
6066          * grub through the INIT pulling addresses and loading them to the
6067          * nets structure in the asoc. The from address in the mbuf should
6068          * also be loaded (if it is not already). This routine can be called
6069          * with either INIT or INIT-ACK's as long as the m points to the IP
6070          * packet and the offset points to the beginning of the parameters.
6071          */
6072         struct sctp_inpcb *inp;
6073         struct sctp_nets *net, *nnet, *net_tmp;
6074         struct sctp_paramhdr *phdr, param_buf;
6075         struct sctp_tcb *stcb_tmp;
6076         uint16_t ptype, plen;
6077         struct sockaddr *sa;
6078         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6079         struct sctp_auth_random *p_random = NULL;
6080         uint16_t random_len = 0;
6081         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6082         struct sctp_auth_hmac_algo *hmacs = NULL;
6083         uint16_t hmacs_len = 0;
6084         uint8_t saw_asconf = 0;
6085         uint8_t saw_asconf_ack = 0;
6086         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6087         struct sctp_auth_chunk_list *chunks = NULL;
6088         uint16_t num_chunks = 0;
6089         sctp_key_t *new_key;
6090         uint32_t keylen;
6091         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6092         uint8_t peer_supports_ecn;
6093         uint8_t peer_supports_prsctp;
6094         uint8_t peer_supports_auth;
6095         uint8_t peer_supports_asconf;
6096         uint8_t peer_supports_asconf_ack;
6097         uint8_t peer_supports_reconfig;
6098         uint8_t peer_supports_nrsack;
6099         uint8_t peer_supports_pktdrop;
6100         uint8_t peer_supports_idata;
6101 #ifdef INET
6102         struct sockaddr_in sin;
6103 #endif
6104 #ifdef INET6
6105         struct sockaddr_in6 sin6;
6106 #endif
6107
6108         /* First get the destination address setup too. */
6109 #ifdef INET
6110         memset(&sin, 0, sizeof(sin));
6111         sin.sin_family = AF_INET;
6112         sin.sin_len = sizeof(sin);
6113         sin.sin_port = stcb->rport;
6114 #endif
6115 #ifdef INET6
6116         memset(&sin6, 0, sizeof(sin6));
6117         sin6.sin6_family = AF_INET6;
6118         sin6.sin6_len = sizeof(struct sockaddr_in6);
6119         sin6.sin6_port = stcb->rport;
6120 #endif
6121         if (altsa) {
6122                 sa = altsa;
6123         } else {
6124                 sa = src;
6125         }
6126         peer_supports_idata = 0;
6127         peer_supports_ecn = 0;
6128         peer_supports_prsctp = 0;
6129         peer_supports_auth = 0;
6130         peer_supports_asconf = 0;
6131         peer_supports_reconfig = 0;
6132         peer_supports_nrsack = 0;
6133         peer_supports_pktdrop = 0;
6134         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6135                 /* mark all addresses that we have currently on the list */
6136                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6137         }
6138         /* does the source address already exist? if so skip it */
6139         inp = stcb->sctp_ep;
6140         atomic_add_int(&stcb->asoc.refcnt, 1);
6141         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6142         atomic_add_int(&stcb->asoc.refcnt, -1);
6143
6144         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6145                 /* we must add the source address */
6146                 /* no scope set here since we have a tcb already. */
6147                 switch (sa->sa_family) {
6148 #ifdef INET
6149                 case AF_INET:
6150                         if (stcb->asoc.scope.ipv4_addr_legal) {
6151                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6152                                         return (-1);
6153                                 }
6154                         }
6155                         break;
6156 #endif
6157 #ifdef INET6
6158                 case AF_INET6:
6159                         if (stcb->asoc.scope.ipv6_addr_legal) {
6160                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6161                                         return (-2);
6162                                 }
6163                         }
6164                         break;
6165 #endif
6166                 default:
6167                         break;
6168                 }
6169         } else {
6170                 if (net_tmp != NULL && stcb_tmp == stcb) {
6171                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6172                 } else if (stcb_tmp != stcb) {
6173                         /* It belongs to another association? */
6174                         if (stcb_tmp)
6175                                 SCTP_TCB_UNLOCK(stcb_tmp);
6176                         return (-3);
6177                 }
6178         }
6179         if (stcb->asoc.state == 0) {
6180                 /* the assoc was freed? */
6181                 return (-4);
6182         }
6183         /* now we must go through each of the params. */
6184         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
6185         while (phdr) {
6186                 ptype = ntohs(phdr->param_type);
6187                 plen = ntohs(phdr->param_length);
6188                 /*
6189                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6190                  * (uint32_t)ptype, (int)plen);
6191                  */
6192                 if (offset + plen > limit) {
6193                         break;
6194                 }
6195                 if (plen == 0) {
6196                         break;
6197                 }
6198 #ifdef INET
6199                 if (ptype == SCTP_IPV4_ADDRESS) {
6200                         if (stcb->asoc.scope.ipv4_addr_legal) {
6201                                 struct sctp_ipv4addr_param *p4, p4_buf;
6202
6203                                 /* ok get the v4 address and check/add */
6204                                 phdr = sctp_get_next_param(m, offset,
6205                                     (struct sctp_paramhdr *)&p4_buf,
6206                                     sizeof(p4_buf));
6207                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6208                                     phdr == NULL) {
6209                                         return (-5);
6210                                 }
6211                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6212                                 sin.sin_addr.s_addr = p4->addr;
6213                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6214                                         /* Skip multi-cast addresses */
6215                                         goto next_param;
6216                                 }
6217                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6218                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6219                                         goto next_param;
6220                                 }
6221                                 sa = (struct sockaddr *)&sin;
6222                                 inp = stcb->sctp_ep;
6223                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6224                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6225                                     dst, stcb);
6226                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6227
6228                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6229                                     inp == NULL) {
6230                                         /* we must add the source address */
6231                                         /*
6232                                          * no scope set since we have a tcb
6233                                          * already
6234                                          */
6235
6236                                         /*
6237                                          * we must validate the state again
6238                                          * here
6239                                          */
6240                         add_it_now:
6241                                         if (stcb->asoc.state == 0) {
6242                                                 /* the assoc was freed? */
6243                                                 return (-7);
6244                                         }
6245                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6246                                                 return (-8);
6247                                         }
6248                                 } else if (stcb_tmp == stcb) {
6249                                         if (stcb->asoc.state == 0) {
6250                                                 /* the assoc was freed? */
6251                                                 return (-10);
6252                                         }
6253                                         if (net != NULL) {
6254                                                 /* clear flag */
6255                                                 net->dest_state &=
6256                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6257                                         }
6258                                 } else {
6259                                         /*
6260                                          * strange, address is in another
6261                                          * assoc? straighten out locks.
6262                                          */
6263                                         if (stcb_tmp) {
6264                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6265                                                         struct mbuf *op_err;
6266                                                         char msg[SCTP_DIAG_INFO_LEN];
6267
6268                                                         /*
6269                                                          * in setup state we
6270                                                          * abort this guy
6271                                                          */
6272                                                         snprintf(msg, sizeof(msg),
6273                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6274                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6275                                                             msg);
6276                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6277                                                             stcb_tmp, op_err,
6278                                                             SCTP_SO_NOT_LOCKED);
6279                                                         goto add_it_now;
6280                                                 }
6281                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6282                                         }
6283                                         if (stcb->asoc.state == 0) {
6284                                                 /* the assoc was freed? */
6285                                                 return (-12);
6286                                         }
6287                                         return (-13);
6288                                 }
6289                         }
6290                 } else
6291 #endif
6292 #ifdef INET6
6293                 if (ptype == SCTP_IPV6_ADDRESS) {
6294                         if (stcb->asoc.scope.ipv6_addr_legal) {
6295                                 /* ok get the v6 address and check/add */
6296                                 struct sctp_ipv6addr_param *p6, p6_buf;
6297
6298                                 phdr = sctp_get_next_param(m, offset,
6299                                     (struct sctp_paramhdr *)&p6_buf,
6300                                     sizeof(p6_buf));
6301                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6302                                     phdr == NULL) {
6303                                         return (-14);
6304                                 }
6305                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6306                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6307                                     sizeof(p6->addr));
6308                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6309                                         /* Skip multi-cast addresses */
6310                                         goto next_param;
6311                                 }
6312                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6313                                         /*
6314                                          * Link local make no sense without
6315                                          * scope
6316                                          */
6317                                         goto next_param;
6318                                 }
6319                                 sa = (struct sockaddr *)&sin6;
6320                                 inp = stcb->sctp_ep;
6321                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6322                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6323                                     dst, stcb);
6324                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6325                                 if (stcb_tmp == NULL &&
6326                                     (inp == stcb->sctp_ep || inp == NULL)) {
6327                                         /*
6328                                          * we must validate the state again
6329                                          * here
6330                                          */
6331                         add_it_now6:
6332                                         if (stcb->asoc.state == 0) {
6333                                                 /* the assoc was freed? */
6334                                                 return (-16);
6335                                         }
6336                                         /*
6337                                          * we must add the address, no scope
6338                                          * set
6339                                          */
6340                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6341                                                 return (-17);
6342                                         }
6343                                 } else if (stcb_tmp == stcb) {
6344                                         /*
6345                                          * we must validate the state again
6346                                          * here
6347                                          */
6348                                         if (stcb->asoc.state == 0) {
6349                                                 /* the assoc was freed? */
6350                                                 return (-19);
6351                                         }
6352                                         if (net != NULL) {
6353                                                 /* clear flag */
6354                                                 net->dest_state &=
6355                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6356                                         }
6357                                 } else {
6358                                         /*
6359                                          * strange, address is in another
6360                                          * assoc? straighten out locks.
6361                                          */
6362                                         if (stcb_tmp) {
6363                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6364                                                         struct mbuf *op_err;
6365                                                         char msg[SCTP_DIAG_INFO_LEN];
6366
6367                                                         /*
6368                                                          * in setup state we
6369                                                          * abort this guy
6370                                                          */
6371                                                         snprintf(msg, sizeof(msg),
6372                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6373                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6374                                                             msg);
6375                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6376                                                             stcb_tmp, op_err,
6377                                                             SCTP_SO_NOT_LOCKED);
6378                                                         goto add_it_now6;
6379                                                 }
6380                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6381                                         }
6382                                         if (stcb->asoc.state == 0) {
6383                                                 /* the assoc was freed? */
6384                                                 return (-21);
6385                                         }
6386                                         return (-22);
6387                                 }
6388                         }
6389                 } else
6390 #endif
6391                 if (ptype == SCTP_ECN_CAPABLE) {
6392                         peer_supports_ecn = 1;
6393                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6394                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6395                                 struct sctp_adaptation_layer_indication ai,
6396                                                                 *aip;
6397
6398                                 phdr = sctp_get_next_param(m, offset,
6399                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6400                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6401                                 if (aip) {
6402                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6403                                         stcb->asoc.adaptation_needed = 1;
6404                                 }
6405                         }
6406                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6407                         struct sctp_asconf_addr_param lstore, *fee;
6408                         int lptype;
6409                         struct sockaddr *lsa = NULL;
6410 #ifdef INET
6411                         struct sctp_asconf_addrv4_param *fii;
6412 #endif
6413
6414                         if (stcb->asoc.asconf_supported == 0) {
6415                                 return (-100);
6416                         }
6417                         if (plen > sizeof(lstore)) {
6418                                 return (-23);
6419                         }
6420                         phdr = sctp_get_next_param(m, offset,
6421                             (struct sctp_paramhdr *)&lstore,
6422                             plen);
6423                         if (phdr == NULL) {
6424                                 return (-24);
6425                         }
6426                         fee = (struct sctp_asconf_addr_param *)phdr;
6427                         lptype = ntohs(fee->addrp.ph.param_type);
6428                         switch (lptype) {
6429 #ifdef INET
6430                         case SCTP_IPV4_ADDRESS:
6431                                 if (plen !=
6432                                     sizeof(struct sctp_asconf_addrv4_param)) {
6433                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6434                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6435                                             plen);
6436                                 } else {
6437                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6438                                         sin.sin_addr.s_addr = fii->addrp.addr;
6439                                         lsa = (struct sockaddr *)&sin;
6440                                 }
6441                                 break;
6442 #endif
6443 #ifdef INET6
6444                         case SCTP_IPV6_ADDRESS:
6445                                 if (plen !=
6446                                     sizeof(struct sctp_asconf_addr_param)) {
6447                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6448                                             (int)sizeof(struct sctp_asconf_addr_param),
6449                                             plen);
6450                                 } else {
6451                                         memcpy(sin6.sin6_addr.s6_addr,
6452                                             fee->addrp.addr,
6453                                             sizeof(fee->addrp.addr));
6454                                         lsa = (struct sockaddr *)&sin6;
6455                                 }
6456                                 break;
6457 #endif
6458                         default:
6459                                 break;
6460                         }
6461                         if (lsa) {
6462                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6463                         }
6464                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6465                         stcb->asoc.peer_supports_nat = 1;
6466                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6467                         /* Peer supports pr-sctp */
6468                         peer_supports_prsctp = 1;
6469                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6470                         /* A supported extension chunk */
6471                         struct sctp_supported_chunk_types_param *pr_supported;
6472                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6473                         int num_ent, i;
6474
6475                         if (plen > sizeof(local_store)) {
6476                                 return (-35);
6477                         }
6478                         phdr = sctp_get_next_param(m, offset,
6479                             (struct sctp_paramhdr *)&local_store, plen);
6480                         if (phdr == NULL) {
6481                                 return (-25);
6482                         }
6483                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6484                         num_ent = plen - sizeof(struct sctp_paramhdr);
6485                         for (i = 0; i < num_ent; i++) {
6486                                 switch (pr_supported->chunk_types[i]) {
6487                                 case SCTP_ASCONF:
6488                                         peer_supports_asconf = 1;
6489                                         break;
6490                                 case SCTP_ASCONF_ACK:
6491                                         peer_supports_asconf_ack = 1;
6492                                         break;
6493                                 case SCTP_FORWARD_CUM_TSN:
6494                                         peer_supports_prsctp = 1;
6495                                         break;
6496                                 case SCTP_PACKET_DROPPED:
6497                                         peer_supports_pktdrop = 1;
6498                                         break;
6499                                 case SCTP_NR_SELECTIVE_ACK:
6500                                         peer_supports_nrsack = 1;
6501                                         break;
6502                                 case SCTP_STREAM_RESET:
6503                                         peer_supports_reconfig = 1;
6504                                         break;
6505                                 case SCTP_AUTHENTICATION:
6506                                         peer_supports_auth = 1;
6507                                         break;
6508                                 case SCTP_IDATA:
6509                                         peer_supports_idata = 1;
6510                                         break;
6511                                 default:
6512                                         /* one I have not learned yet */
6513                                         break;
6514
6515                                 }
6516                         }
6517                 } else if (ptype == SCTP_RANDOM) {
6518                         if (plen > sizeof(random_store))
6519                                 break;
6520                         if (got_random) {
6521                                 /* already processed a RANDOM */
6522                                 goto next_param;
6523                         }
6524                         phdr = sctp_get_next_param(m, offset,
6525                             (struct sctp_paramhdr *)random_store,
6526                             plen);
6527                         if (phdr == NULL)
6528                                 return (-26);
6529                         p_random = (struct sctp_auth_random *)phdr;
6530                         random_len = plen - sizeof(*p_random);
6531                         /* enforce the random length */
6532                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6533                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6534                                 return (-27);
6535                         }
6536                         got_random = 1;
6537                 } else if (ptype == SCTP_HMAC_LIST) {
6538                         uint16_t num_hmacs;
6539                         uint16_t i;
6540
6541                         if (plen > sizeof(hmacs_store))
6542                                 break;
6543                         if (got_hmacs) {
6544                                 /* already processed a HMAC list */
6545                                 goto next_param;
6546                         }
6547                         phdr = sctp_get_next_param(m, offset,
6548                             (struct sctp_paramhdr *)hmacs_store,
6549                             plen);
6550                         if (phdr == NULL)
6551                                 return (-28);
6552                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6553                         hmacs_len = plen - sizeof(*hmacs);
6554                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6555                         /* validate the hmac list */
6556                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6557                                 return (-29);
6558                         }
6559                         if (stcb->asoc.peer_hmacs != NULL)
6560                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6561                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6562                         if (stcb->asoc.peer_hmacs != NULL) {
6563                                 for (i = 0; i < num_hmacs; i++) {
6564                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6565                                             ntohs(hmacs->hmac_ids[i]));
6566                                 }
6567                         }
6568                         got_hmacs = 1;
6569                 } else if (ptype == SCTP_CHUNK_LIST) {
6570                         int i;
6571
6572                         if (plen > sizeof(chunks_store))
6573                                 break;
6574                         if (got_chklist) {
6575                                 /* already processed a Chunks list */
6576                                 goto next_param;
6577                         }
6578                         phdr = sctp_get_next_param(m, offset,
6579                             (struct sctp_paramhdr *)chunks_store,
6580                             plen);
6581                         if (phdr == NULL)
6582                                 return (-30);
6583                         chunks = (struct sctp_auth_chunk_list *)phdr;
6584                         num_chunks = plen - sizeof(*chunks);
6585                         if (stcb->asoc.peer_auth_chunks != NULL)
6586                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6587                         else
6588                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6589                         for (i = 0; i < num_chunks; i++) {
6590                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6591                                     stcb->asoc.peer_auth_chunks);
6592                                 /* record asconf/asconf-ack if listed */
6593                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6594                                         saw_asconf = 1;
6595                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6596                                         saw_asconf_ack = 1;
6597
6598                         }
6599                         got_chklist = 1;
6600                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6601                             (ptype == SCTP_STATE_COOKIE) ||
6602                             (ptype == SCTP_UNRECOG_PARAM) ||
6603                             (ptype == SCTP_COOKIE_PRESERVE) ||
6604                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6605                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6606                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6607                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6608                     (ptype == SCTP_SUCCESS_REPORT)) {
6609                          /* don't care */ ;
6610                 } else {
6611                         if ((ptype & 0x8000) == 0x0000) {
6612                                 /*
6613                                  * must stop processing the rest of the
6614                                  * param's. Any report bits were handled
6615                                  * with the call to
6616                                  * sctp_arethere_unrecognized_parameters()
6617                                  * when the INIT or INIT-ACK was first seen.
6618                                  */
6619                                 break;
6620                         }
6621                 }
6622
6623 next_param:
6624                 offset += SCTP_SIZE32(plen);
6625                 if (offset >= limit) {
6626                         break;
6627                 }
6628                 phdr = sctp_get_next_param(m, offset, &param_buf,
6629                     sizeof(param_buf));
6630         }
6631         /* Now check to see if we need to purge any addresses */
6632         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6633                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6634                     SCTP_ADDR_NOT_IN_ASSOC) {
6635                         /* This address has been removed from the asoc */
6636                         /* remove and free it */
6637                         stcb->asoc.numnets--;
6638                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6639                         sctp_free_remote_addr(net);
6640                         if (net == stcb->asoc.primary_destination) {
6641                                 stcb->asoc.primary_destination = NULL;
6642                                 sctp_select_primary_destination(stcb);
6643                         }
6644                 }
6645         }
6646         if ((stcb->asoc.ecn_supported == 1) &&
6647             (peer_supports_ecn == 0)) {
6648                 stcb->asoc.ecn_supported = 0;
6649         }
6650         if ((stcb->asoc.prsctp_supported == 1) &&
6651             (peer_supports_prsctp == 0)) {
6652                 stcb->asoc.prsctp_supported = 0;
6653         }
6654         if ((stcb->asoc.auth_supported == 1) &&
6655             ((peer_supports_auth == 0) ||
6656             (got_random == 0) || (got_hmacs == 0))) {
6657                 stcb->asoc.auth_supported = 0;
6658         }
6659         if ((stcb->asoc.asconf_supported == 1) &&
6660             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6661             (stcb->asoc.auth_supported == 0) ||
6662             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6663                 stcb->asoc.asconf_supported = 0;
6664         }
6665         if ((stcb->asoc.reconfig_supported == 1) &&
6666             (peer_supports_reconfig == 0)) {
6667                 stcb->asoc.reconfig_supported = 0;
6668         }
6669         if ((stcb->asoc.idata_supported == 1) &&
6670             (peer_supports_idata == 0)) {
6671                 stcb->asoc.idata_supported = 0;
6672         }
6673         if ((stcb->asoc.nrsack_supported == 1) &&
6674             (peer_supports_nrsack == 0)) {
6675                 stcb->asoc.nrsack_supported = 0;
6676         }
6677         if ((stcb->asoc.pktdrop_supported == 1) &&
6678             (peer_supports_pktdrop == 0)) {
6679                 stcb->asoc.pktdrop_supported = 0;
6680         }
6681         /* validate authentication required parameters */
6682         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6683                 /* peer does not support auth but sent a chunks list? */
6684                 return (-31);
6685         }
6686         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6687                 /* peer supports asconf but not auth? */
6688                 return (-32);
6689         } else if ((peer_supports_asconf == 1) &&
6690                     (peer_supports_auth == 1) &&
6691             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6692                 return (-33);
6693         }
6694         /* concatenate the full random key */
6695         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6696         if (chunks != NULL) {
6697                 keylen += sizeof(*chunks) + num_chunks;
6698         }
6699         new_key = sctp_alloc_key(keylen);
6700         if (new_key != NULL) {
6701                 /* copy in the RANDOM */
6702                 if (p_random != NULL) {
6703                         keylen = sizeof(*p_random) + random_len;
6704                         memcpy(new_key->key, p_random, keylen);
6705                 } else {
6706                         keylen = 0;
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 }