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                 bzero(wi, 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_WQ_ADDR_UNLOCK();
 713
 714                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 715                     (struct sctp_inpcb *)NULL,
 716                     (struct sctp_tcb *)NULL,
 717                     (struct sctp_nets *)NULL);
 718         } else {
 719                 /* it's ready for use */
 720                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 721         }
 722         return (sctp_ifap);
 723 }
 724
 725 void
 726 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 727     uint32_t ifn_index, const char *if_name)
 728 {
 729         struct sctp_vrf *vrf;
 730         struct sctp_ifa *sctp_ifap = NULL;
 731
 732         SCTP_IPI_ADDR_WLOCK();
 733         vrf = sctp_find_vrf(vrf_id);
 734         if (vrf == NULL) {
 735                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 736                 goto out_now;
 737         }
 738 #ifdef SCTP_DEBUG
 739         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 740         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 741 #endif
 742         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 743         if (sctp_ifap) {
 744                 /* Validate the delete */
 745                 if (sctp_ifap->ifn_p) {
 746                         int valid = 0;
 747
 748                         /*-
 749                          * The name has priority over the ifn_index
 750                          * if its given. We do this especially for
 751                          * panda who might recycle indexes fast.
 752                          */
 753                         if (if_name) {
 754                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 755                                         /* They match its a correct delete */
 756                                         valid = 1;
 757                                 }
 758                         }
 759                         if (!valid) {
 760                                 /* last ditch check ifn_index */
 761                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 762                                         valid = 1;
 763                                 }
 764                         }
 765                         if (!valid) {
 766                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 767                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 768                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 769                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 770                                 SCTP_IPI_ADDR_WUNLOCK();
 771                                 return;
 772                         }
 773                 }
 774                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
 775                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 776                 /*
 777                  * We don't set the flag. This means that the structure will
 778                  * hang around in EP's that have bound specific to it until
 779                  * they close. This gives us TCP like behavior if someone
 780                  * removes an address (or for that matter adds it right
 781                  * back).
 782                  */
 783                 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
 784                 vrf->total_ifa_count--;
 785                 LIST_REMOVE(sctp_ifap, next_bucket);
 786                 sctp_remove_ifa_from_ifn(sctp_ifap);
 787         }
 788 #ifdef SCTP_DEBUG
 789         else {
 790                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 791                     ifn_index);
 792                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 793         }
 794 #endif
 795
 796 out_now:
 797         SCTP_IPI_ADDR_WUNLOCK();
 798         if (sctp_ifap) {
 799                 struct sctp_laddr *wi;
 800
 801                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 802                 if (wi == NULL) {
 803                         /*
 804                          * Gak, what can we do? We have lost an address
 805                          * change can you say HOSED?
 806                          */
 807                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 808
 809                         /* Oops, must decrement the count */
 810                         sctp_free_ifa(sctp_ifap);
 811                         return;
 812                 }
 813                 SCTP_INCR_LADDR_COUNT();
 814                 bzero(wi, sizeof(*wi));
 815                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 816                 wi->ifa = sctp_ifap;
 817                 wi->action = SCTP_DEL_IP_ADDRESS;
 818                 SCTP_WQ_ADDR_LOCK();
 819                 /*
 820                  * Should this really be a tailq? As it is we will process
 821                  * the newest first :-0
 822                  */
 823                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 824                 SCTP_WQ_ADDR_UNLOCK();
 825
 826                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 827                     (struct sctp_inpcb *)NULL,
 828                     (struct sctp_tcb *)NULL,
 829                     (struct sctp_nets *)NULL);
 830         }
 831         return;
 832 }
 833
 834
 835 static int
 836 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
 837 {
 838         int loopback_scope;
 839 #if defined(INET)
 840         int ipv4_local_scope, ipv4_addr_legal;
 841 #endif
 842 #if defined(INET6)
 843         int local_scope, site_scope, ipv6_addr_legal;
 844 #endif
 845         struct sctp_vrf *vrf;
 846         struct sctp_ifn *sctp_ifn;
 847         struct sctp_ifa *sctp_ifa;
 848
 849         loopback_scope = stcb->asoc.scope.loopback_scope;
 850 #if defined(INET)
 851         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
 852         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
 853 #endif
 854 #if defined(INET6)
 855         local_scope = stcb->asoc.scope.local_scope;
 856         site_scope = stcb->asoc.scope.site_scope;
 857         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
 858 #endif
 859
 860         SCTP_IPI_ADDR_RLOCK();
 861         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
 862         if (vrf == NULL) {
 863                 /* no vrf, no addresses */
 864                 SCTP_IPI_ADDR_RUNLOCK();
 865                 return (0);
 866         }
 867         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 868                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 869                         if ((loopback_scope == 0) &&
 870                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 871                                 continue;
 872                         }
 873                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 874                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
 875                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
 876                                         /*
 877                                          * We allow pending addresses, where
 878                                          * we have sent an asconf-add to be
 879                                          * considered valid.
 880                                          */
 881                                         continue;
 882                                 }
 883                                 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
 884                                         continue;
 885                                 }
 886                                 switch (sctp_ifa->address.sa.sa_family) {
 887 #ifdef INET
 888                                 case AF_INET:
 889                                         if (ipv4_addr_legal) {
 890                                                 struct sockaddr_in *sin,
 891                                                            *rsin;
 892
 893                                                 sin = &sctp_ifa->address.sin;
 894                                                 rsin = (struct sockaddr_in *)to;
 895                                                 if ((ipv4_local_scope == 0) &&
 896                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 897                                                         continue;
 898                                                 }
 899                                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
 900                                                     &sin->sin_addr) != 0) {
 901                                                         continue;
 902                                                 }
 903                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 904                                                         SCTP_IPI_ADDR_RUNLOCK();
 905                                                         return (1);
 906                                                 }
 907                                         }
 908                                         break;
 909 #endif
 910 #ifdef INET6
 911                                 case AF_INET6:
 912                                         if (ipv6_addr_legal) {
 913                                                 struct sockaddr_in6 *sin6,
 914                                                             *rsin6;
 915
 916                                                 sin6 = &sctp_ifa->address.sin6;
 917                                                 rsin6 = (struct sockaddr_in6 *)to;
 918                                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
 919                                                     &sin6->sin6_addr) != 0) {
 920                                                         continue;
 921                                                 }
 922                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 923                                                         if (local_scope == 0)
 924                                                                 continue;
 925                                                         if (sin6->sin6_scope_id == 0) {
 926                                                                 if (sa6_recoverscope(sin6) != 0)
 927                                                                         continue;
 928                                                         }
 929                                                 }
 930                                                 if ((site_scope == 0) &&
 931                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
 932                                                         continue;
 933                                                 }
 934                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 935                                                         SCTP_IPI_ADDR_RUNLOCK();
 936                                                         return (1);
 937                                                 }
 938                                         }
 939                                         break;
 940 #endif
 941                                 default:
 942                                         /* TSNH */
 943                                         break;
 944                                 }
 945                         }
 946                 }
 947         } else {
 948                 struct sctp_laddr *laddr;
 949
 950                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
 951                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 952                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 953                                 continue;
 954                         }
 955                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
 956                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
 957                                 /*
 958                                  * We allow pending addresses, where we have
 959                                  * sent an asconf-add to be considered
 960                                  * valid.
 961                                  */
 962                                 continue;
 963                         }
 964                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
 965                                 continue;
 966                         }
 967                         switch (to->sa_family) {
 968 #ifdef INET
 969                         case AF_INET:
 970                                 {
 971                                         struct sockaddr_in *sin, *rsin;
 972
 973                                         sin = &laddr->ifa->address.sin;
 974                                         rsin = (struct sockaddr_in *)to;
 975                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 976                                                 SCTP_IPI_ADDR_RUNLOCK();
 977                                                 return (1);
 978                                         }
 979                                         break;
 980                                 }
 981 #endif
 982 #ifdef INET6
 983                         case AF_INET6:
 984                                 {
 985                                         struct sockaddr_in6 *sin6, *rsin6;
 986
 987                                         sin6 = &laddr->ifa->address.sin6;
 988                                         rsin6 = (struct sockaddr_in6 *)to;
 989                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 990                                                 SCTP_IPI_ADDR_RUNLOCK();
 991                                                 return (1);
 992                                         }
 993                                         break;
 994                                 }
 995
 996 #endif
 997                         default:
 998                                 /* TSNH */
 999                                 break;
1000                         }
1001
1002                 }
1003         }
1004         SCTP_IPI_ADDR_RUNLOCK();
1005         return (0);
1006 }
1007
1008
1009 static struct sctp_tcb *
1010 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1011     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1012 {
1013         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1014         /*
1015          * If we support the TCP model, then we must now dig through to see
1016          * if we can find our endpoint in the list of tcp ep's.
1017          */
1018         uint16_t lport, rport;
1019         struct sctppcbhead *ephead;
1020         struct sctp_inpcb *inp;
1021         struct sctp_laddr *laddr;
1022         struct sctp_tcb *stcb;
1023         struct sctp_nets *net;
1024
1025         if ((to == NULL) || (from == NULL)) {
1026                 return (NULL);
1027         }
1028         switch (to->sa_family) {
1029 #ifdef INET
1030         case AF_INET:
1031                 if (from->sa_family == AF_INET) {
1032                         lport = ((struct sockaddr_in *)to)->sin_port;
1033                         rport = ((struct sockaddr_in *)from)->sin_port;
1034                 } else {
1035                         return (NULL);
1036                 }
1037                 break;
1038 #endif
1039 #ifdef INET6
1040         case AF_INET6:
1041                 if (from->sa_family == AF_INET6) {
1042                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
1043                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
1044                 } else {
1045                         return (NULL);
1046                 }
1047                 break;
1048 #endif
1049         default:
1050                 return (NULL);
1051         }
1052         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1053         /*
1054          * Ok now for each of the guys in this bucket we must look and see:
1055          * - Does the remote port match. - Does there single association's
1056          * addresses match this address (to). If so we update p_ep to point
1057          * to this ep and return the tcb from it.
1058          */
1059         LIST_FOREACH(inp, ephead, sctp_hash) {
1060                 SCTP_INP_RLOCK(inp);
1061                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1062                         SCTP_INP_RUNLOCK(inp);
1063                         continue;
1064                 }
1065                 if (lport != inp->sctp_lport) {
1066                         SCTP_INP_RUNLOCK(inp);
1067                         continue;
1068                 }
1069                 switch (to->sa_family) {
1070 #ifdef INET
1071                 case AF_INET:
1072                         {
1073                                 struct sockaddr_in *sin;
1074
1075                                 sin = (struct sockaddr_in *)to;
1076                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1077                                     &sin->sin_addr) != 0) {
1078                                         SCTP_INP_RUNLOCK(inp);
1079                                         continue;
1080                                 }
1081                                 break;
1082                         }
1083 #endif
1084 #ifdef INET6
1085                 case AF_INET6:
1086                         {
1087                                 struct sockaddr_in6 *sin6;
1088
1089                                 sin6 = (struct sockaddr_in6 *)to;
1090                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1091                                     &sin6->sin6_addr) != 0) {
1092                                         SCTP_INP_RUNLOCK(inp);
1093                                         continue;
1094                                 }
1095                                 break;
1096                         }
1097 #endif
1098                 default:
1099                         SCTP_INP_RUNLOCK(inp);
1100                         continue;
1101                 }
1102                 if (inp->def_vrf_id != vrf_id) {
1103                         SCTP_INP_RUNLOCK(inp);
1104                         continue;
1105                 }
1106                 /* check to see if the ep has one of the addresses */
1107                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1108                         /* We are NOT bound all, so look further */
1109                         int match = 0;
1110
1111                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1112
1113                                 if (laddr->ifa == NULL) {
1114                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__);
1115                                         continue;
1116                                 }
1117                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1118                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1119                                         continue;
1120                                 }
1121                                 if (laddr->ifa->address.sa.sa_family ==
1122                                     to->sa_family) {
1123                                         /* see if it matches */
1124 #ifdef INET
1125                                         if (from->sa_family == AF_INET) {
1126                                                 struct sockaddr_in *intf_addr,
1127                                                            *sin;
1128
1129                                                 intf_addr = &laddr->ifa->address.sin;
1130                                                 sin = (struct sockaddr_in *)to;
1131                                                 if (sin->sin_addr.s_addr ==
1132                                                     intf_addr->sin_addr.s_addr) {
1133                                                         match = 1;
1134                                                         break;
1135                                                 }
1136                                         }
1137 #endif
1138 #ifdef INET6
1139                                         if (from->sa_family == AF_INET6) {
1140                                                 struct sockaddr_in6 *intf_addr6;
1141                                                 struct sockaddr_in6 *sin6;
1142
1143                                                 sin6 = (struct sockaddr_in6 *)
1144                                                     to;
1145                                                 intf_addr6 = &laddr->ifa->address.sin6;
1146
1147                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1148                                                     intf_addr6)) {
1149                                                         match = 1;
1150                                                         break;
1151                                                 }
1152                                         }
1153 #endif
1154                                 }
1155                         }
1156                         if (match == 0) {
1157                                 /* This endpoint does not have this address */
1158                                 SCTP_INP_RUNLOCK(inp);
1159                                 continue;
1160                         }
1161                 }
1162                 /*
1163                  * Ok if we hit here the ep has the address, does it hold
1164                  * the tcb?
1165                  */
1166                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1167                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1168                 if (stcb == NULL) {
1169                         SCTP_INP_RUNLOCK(inp);
1170                         continue;
1171                 }
1172                 SCTP_TCB_LOCK(stcb);
1173                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1174                         SCTP_TCB_UNLOCK(stcb);
1175                         SCTP_INP_RUNLOCK(inp);
1176                         continue;
1177                 }
1178                 if (stcb->rport != rport) {
1179                         /* remote port does not match. */
1180                         SCTP_TCB_UNLOCK(stcb);
1181                         SCTP_INP_RUNLOCK(inp);
1182                         continue;
1183                 }
1184                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1185                         SCTP_TCB_UNLOCK(stcb);
1186                         SCTP_INP_RUNLOCK(inp);
1187                         continue;
1188                 }
1189                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1190                         SCTP_TCB_UNLOCK(stcb);
1191                         SCTP_INP_RUNLOCK(inp);
1192                         continue;
1193                 }
1194                 /* Does this TCB have a matching address? */
1195                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1196
1197                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1198                                 /* not the same family, can't be a match */
1199                                 continue;
1200                         }
1201                         switch (from->sa_family) {
1202 #ifdef INET
1203                         case AF_INET:
1204                                 {
1205                                         struct sockaddr_in *sin, *rsin;
1206
1207                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
1208                                         rsin = (struct sockaddr_in *)from;
1209                                         if (sin->sin_addr.s_addr ==
1210                                             rsin->sin_addr.s_addr) {
1211                                                 /* found it */
1212                                                 if (netp != NULL) {
1213                                                         *netp = net;
1214                                                 }
1215                                                 /*
1216                                                  * Update the endpoint
1217                                                  * pointer
1218                                                  */
1219                                                 *inp_p = inp;
1220                                                 SCTP_INP_RUNLOCK(inp);
1221                                                 return (stcb);
1222                                         }
1223                                         break;
1224                                 }
1225 #endif
1226 #ifdef INET6
1227                         case AF_INET6:
1228                                 {
1229                                         struct sockaddr_in6 *sin6, *rsin6;
1230
1231                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1232                                         rsin6 = (struct sockaddr_in6 *)from;
1233                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1234                                             rsin6)) {
1235                                                 /* found it */
1236                                                 if (netp != NULL) {
1237                                                         *netp = net;
1238                                                 }
1239                                                 /*
1240                                                  * Update the endpoint
1241                                                  * pointer
1242                                                  */
1243                                                 *inp_p = inp;
1244                                                 SCTP_INP_RUNLOCK(inp);
1245                                                 return (stcb);
1246                                         }
1247                                         break;
1248                                 }
1249 #endif
1250                         default:
1251                                 /* TSNH */
1252                                 break;
1253                         }
1254                 }
1255                 SCTP_TCB_UNLOCK(stcb);
1256                 SCTP_INP_RUNLOCK(inp);
1257         }
1258         return (NULL);
1259 }
1260
1261
1262 /*
1263  * rules for use
1264  *
1265  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1266  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1267  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1268  * NULL.
1269  */
1270
1271 struct sctp_tcb *
1272 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1273     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1274 {
1275         struct sctpasochead *head;
1276         struct sctp_inpcb *inp;
1277         struct sctp_tcb *stcb = NULL;
1278         struct sctp_nets *net;
1279         uint16_t rport;
1280
1281         inp = *inp_p;
1282         switch (remote->sa_family) {
1283 #ifdef INET
1284         case AF_INET:
1285                 rport = (((struct sockaddr_in *)remote)->sin_port);
1286                 break;
1287 #endif
1288 #ifdef INET6
1289         case AF_INET6:
1290                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1291                 break;
1292 #endif
1293         default:
1294                 return (NULL);
1295         }
1296         if (locked_tcb) {
1297                 /*
1298                  * UN-lock so we can do proper locking here this occurs when
1299                  * called from load_addresses_from_init.
1300                  */
1301                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1302                 SCTP_TCB_UNLOCK(locked_tcb);
1303         }
1304         SCTP_INP_INFO_RLOCK();
1305         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1306             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1307                 /*-
1308                  * Now either this guy is our listener or it's the
1309                  * connector. If it is the one that issued the connect, then
1310                  * it's only chance is to be the first TCB in the list. If
1311                  * it is the acceptor, then do the special_lookup to hash
1312                  * and find the real inp.
1313                  */
1314                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1315                         /* to is peer addr, from is my addr */
1316                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1317                             netp, inp->def_vrf_id);
1318                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1319                                 /* we have a locked tcb, lower refcount */
1320                                 SCTP_INP_DECR_REF(inp);
1321                         }
1322                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1323                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1324                                 SCTP_TCB_LOCK(locked_tcb);
1325                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1326                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1327                         }
1328                         SCTP_INP_INFO_RUNLOCK();
1329                         return (stcb);
1330                 } else {
1331                         SCTP_INP_WLOCK(inp);
1332                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1333                                 goto null_return;
1334                         }
1335                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1336                         if (stcb == NULL) {
1337                                 goto null_return;
1338                         }
1339                         SCTP_TCB_LOCK(stcb);
1340
1341                         if (stcb->rport != rport) {
1342                                 /* remote port does not match. */
1343                                 SCTP_TCB_UNLOCK(stcb);
1344                                 goto null_return;
1345                         }
1346                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1347                                 SCTP_TCB_UNLOCK(stcb);
1348                                 goto null_return;
1349                         }
1350                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1351                                 SCTP_TCB_UNLOCK(stcb);
1352                                 goto null_return;
1353                         }
1354                         /* now look at the list of remote addresses */
1355                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1356 #ifdef INVARIANTS
1357                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1358                                         panic("Corrupt net list");
1359                                 }
1360 #endif
1361                                 if (net->ro._l_addr.sa.sa_family !=
1362                                     remote->sa_family) {
1363                                         /* not the same family */
1364                                         continue;
1365                                 }
1366                                 switch (remote->sa_family) {
1367 #ifdef INET
1368                                 case AF_INET:
1369                                         {
1370                                                 struct sockaddr_in *sin,
1371                                                            *rsin;
1372
1373                                                 sin = (struct sockaddr_in *)
1374                                                     &net->ro._l_addr;
1375                                                 rsin = (struct sockaddr_in *)remote;
1376                                                 if (sin->sin_addr.s_addr ==
1377                                                     rsin->sin_addr.s_addr) {
1378                                                         /* found it */
1379                                                         if (netp != NULL) {
1380                                                                 *netp = net;
1381                                                         }
1382                                                         if (locked_tcb == NULL) {
1383                                                                 SCTP_INP_DECR_REF(inp);
1384                                                         } else if (locked_tcb != stcb) {
1385                                                                 SCTP_TCB_LOCK(locked_tcb);
1386                                                         }
1387                                                         if (locked_tcb) {
1388                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1389                                                         }
1390                                                         SCTP_INP_WUNLOCK(inp);
1391                                                         SCTP_INP_INFO_RUNLOCK();
1392                                                         return (stcb);
1393                                                 }
1394                                                 break;
1395                                         }
1396 #endif
1397 #ifdef INET6
1398                                 case AF_INET6:
1399                                         {
1400                                                 struct sockaddr_in6 *sin6,
1401                                                             *rsin6;
1402
1403                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1404                                                 rsin6 = (struct sockaddr_in6 *)remote;
1405                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1406                                                     rsin6)) {
1407                                                         /* found it */
1408                                                         if (netp != NULL) {
1409                                                                 *netp = net;
1410                                                         }
1411                                                         if (locked_tcb == NULL) {
1412                                                                 SCTP_INP_DECR_REF(inp);
1413                                                         } else if (locked_tcb != stcb) {
1414                                                                 SCTP_TCB_LOCK(locked_tcb);
1415                                                         }
1416                                                         if (locked_tcb) {
1417                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1418                                                         }
1419                                                         SCTP_INP_WUNLOCK(inp);
1420                                                         SCTP_INP_INFO_RUNLOCK();
1421                                                         return (stcb);
1422                                                 }
1423                                                 break;
1424                                         }
1425 #endif
1426                                 default:
1427                                         /* TSNH */
1428                                         break;
1429                                 }
1430                         }
1431                         SCTP_TCB_UNLOCK(stcb);
1432                 }
1433         } else {
1434                 SCTP_INP_WLOCK(inp);
1435                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1436                         goto null_return;
1437                 }
1438                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1439                     inp->sctp_hashmark)];
1440                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1441                         if (stcb->rport != rport) {
1442                                 /* remote port does not match */
1443                                 continue;
1444                         }
1445                         SCTP_TCB_LOCK(stcb);
1446                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1447                                 SCTP_TCB_UNLOCK(stcb);
1448                                 continue;
1449                         }
1450                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1451                                 SCTP_TCB_UNLOCK(stcb);
1452                                 continue;
1453                         }
1454                         /* now look at the list of remote addresses */
1455                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1456 #ifdef INVARIANTS
1457                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1458                                         panic("Corrupt net list");
1459                                 }
1460 #endif
1461                                 if (net->ro._l_addr.sa.sa_family !=
1462                                     remote->sa_family) {
1463                                         /* not the same family */
1464                                         continue;
1465                                 }
1466                                 switch (remote->sa_family) {
1467 #ifdef INET
1468                                 case AF_INET:
1469                                         {
1470                                                 struct sockaddr_in *sin,
1471                                                            *rsin;
1472
1473                                                 sin = (struct sockaddr_in *)
1474                                                     &net->ro._l_addr;
1475                                                 rsin = (struct sockaddr_in *)remote;
1476                                                 if (sin->sin_addr.s_addr ==
1477                                                     rsin->sin_addr.s_addr) {
1478                                                         /* found it */
1479                                                         if (netp != NULL) {
1480                                                                 *netp = net;
1481                                                         }
1482                                                         if (locked_tcb == NULL) {
1483                                                                 SCTP_INP_DECR_REF(inp);
1484                                                         } else if (locked_tcb != stcb) {
1485                                                                 SCTP_TCB_LOCK(locked_tcb);
1486                                                         }
1487                                                         if (locked_tcb) {
1488                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1489                                                         }
1490                                                         SCTP_INP_WUNLOCK(inp);
1491                                                         SCTP_INP_INFO_RUNLOCK();
1492                                                         return (stcb);
1493                                                 }
1494                                                 break;
1495                                         }
1496 #endif
1497 #ifdef INET6
1498                                 case AF_INET6:
1499                                         {
1500                                                 struct sockaddr_in6 *sin6,
1501                                                             *rsin6;
1502
1503                                                 sin6 = (struct sockaddr_in6 *)
1504                                                     &net->ro._l_addr;
1505                                                 rsin6 = (struct sockaddr_in6 *)remote;
1506                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1507                                                     rsin6)) {
1508                                                         /* found it */
1509                                                         if (netp != NULL) {
1510                                                                 *netp = net;
1511                                                         }
1512                                                         if (locked_tcb == NULL) {
1513                                                                 SCTP_INP_DECR_REF(inp);
1514                                                         } else if (locked_tcb != stcb) {
1515                                                                 SCTP_TCB_LOCK(locked_tcb);
1516                                                         }
1517                                                         if (locked_tcb) {
1518                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1519                                                         }
1520                                                         SCTP_INP_WUNLOCK(inp);
1521                                                         SCTP_INP_INFO_RUNLOCK();
1522                                                         return (stcb);
1523                                                 }
1524                                                 break;
1525                                         }
1526 #endif
1527                                 default:
1528                                         /* TSNH */
1529                                         break;
1530                                 }
1531                         }
1532                         SCTP_TCB_UNLOCK(stcb);
1533                 }
1534         }
1535 null_return:
1536         /* clean up for returning null */
1537         if (locked_tcb) {
1538                 SCTP_TCB_LOCK(locked_tcb);
1539                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1540         }
1541         SCTP_INP_WUNLOCK(inp);
1542         SCTP_INP_INFO_RUNLOCK();
1543         /* not found */
1544         return (NULL);
1545 }
1546
1547
1548 /*
1549  * Find an association for a specific endpoint using the association id given
1550  * out in the COMM_UP notification
1551  */
1552 struct sctp_tcb *
1553 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1554 {
1555         /*
1556          * Use my the assoc_id to find a endpoint
1557          */
1558         struct sctpasochead *head;
1559         struct sctp_tcb *stcb;
1560         uint32_t id;
1561
1562         if (inp == NULL) {
1563                 SCTP_PRINTF("TSNH ep_associd\n");
1564                 return (NULL);
1565         }
1566         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1567                 SCTP_PRINTF("TSNH ep_associd0\n");
1568                 return (NULL);
1569         }
1570         id = (uint32_t)asoc_id;
1571         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1572         if (head == NULL) {
1573                 /* invalid id TSNH */
1574                 SCTP_PRINTF("TSNH ep_associd1\n");
1575                 return (NULL);
1576         }
1577         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1578                 if (stcb->asoc.assoc_id == id) {
1579                         if (inp != stcb->sctp_ep) {
1580                                 /*
1581                                  * some other guy has the same id active (id
1582                                  * collision ??).
1583                                  */
1584                                 SCTP_PRINTF("TSNH ep_associd2\n");
1585                                 continue;
1586                         }
1587                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1588                                 continue;
1589                         }
1590                         if (want_lock) {
1591                                 SCTP_TCB_LOCK(stcb);
1592                         }
1593                         return (stcb);
1594                 }
1595         }
1596         return (NULL);
1597 }
1598
1599
1600 struct sctp_tcb *
1601 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1602 {
1603         struct sctp_tcb *stcb;
1604
1605         SCTP_INP_RLOCK(inp);
1606         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1607         SCTP_INP_RUNLOCK(inp);
1608         return (stcb);
1609 }
1610
1611
1612 /*
1613  * Endpoint probe expects that the INP_INFO is locked.
1614  */
1615 static struct sctp_inpcb *
1616 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1617     uint16_t lport, uint32_t vrf_id)
1618 {
1619         struct sctp_inpcb *inp;
1620         struct sctp_laddr *laddr;
1621 #ifdef INET
1622         struct sockaddr_in *sin;
1623 #endif
1624 #ifdef INET6
1625         struct sockaddr_in6 *sin6;
1626         struct sockaddr_in6 *intf_addr6;
1627 #endif
1628         int fnd;
1629
1630 #ifdef INET
1631         sin = NULL;
1632 #endif
1633 #ifdef INET6
1634         sin6 = NULL;
1635 #endif
1636         switch (nam->sa_family) {
1637 #ifdef INET
1638         case AF_INET:
1639                 sin = (struct sockaddr_in *)nam;
1640                 break;
1641 #endif
1642 #ifdef INET6
1643         case AF_INET6:
1644                 sin6 = (struct sockaddr_in6 *)nam;
1645                 break;
1646 #endif
1647         default:
1648                 /* unsupported family */
1649                 return (NULL);
1650         }
1651
1652         if (head == NULL)
1653                 return (NULL);
1654
1655         LIST_FOREACH(inp, head, sctp_hash) {
1656                 SCTP_INP_RLOCK(inp);
1657                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1658                         SCTP_INP_RUNLOCK(inp);
1659                         continue;
1660                 }
1661                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1662                     (inp->sctp_lport == lport)) {
1663                         /* got it */
1664                         switch (nam->sa_family) {
1665 #ifdef INET
1666                         case AF_INET:
1667                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1668                                     SCTP_IPV6_V6ONLY(inp)) {
1669                                         /*
1670                                          * IPv4 on a IPv6 socket with ONLY
1671                                          * IPv6 set
1672                                          */
1673                                         SCTP_INP_RUNLOCK(inp);
1674                                         continue;
1675                                 }
1676                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1677                                     &sin->sin_addr) != 0) {
1678                                         SCTP_INP_RUNLOCK(inp);
1679                                         continue;
1680                                 }
1681                                 break;
1682 #endif
1683 #ifdef INET6
1684                         case AF_INET6:
1685                                 /*
1686                                  * A V6 address and the endpoint is NOT
1687                                  * bound V6
1688                                  */
1689                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1690                                         SCTP_INP_RUNLOCK(inp);
1691                                         continue;
1692                                 }
1693                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1694                                     &sin6->sin6_addr) != 0) {
1695                                         SCTP_INP_RUNLOCK(inp);
1696                                         continue;
1697                                 }
1698                                 break;
1699 #endif
1700                         default:
1701                                 break;
1702                         }
1703                         /* does a VRF id match? */
1704                         fnd = 0;
1705                         if (inp->def_vrf_id == vrf_id)
1706                                 fnd = 1;
1707
1708                         SCTP_INP_RUNLOCK(inp);
1709                         if (!fnd)
1710                                 continue;
1711                         return (inp);
1712                 }
1713                 SCTP_INP_RUNLOCK(inp);
1714         }
1715         switch (nam->sa_family) {
1716 #ifdef INET
1717         case AF_INET:
1718                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1719                         /* Can't hunt for one that has no address specified */
1720                         return (NULL);
1721                 }
1722                 break;
1723 #endif
1724 #ifdef INET6
1725         case AF_INET6:
1726                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1727                         /* Can't hunt for one that has no address specified */
1728                         return (NULL);
1729                 }
1730                 break;
1731 #endif
1732         default:
1733                 break;
1734         }
1735         /*
1736          * ok, not bound to all so see if we can find a EP bound to this
1737          * address.
1738          */
1739         LIST_FOREACH(inp, head, sctp_hash) {
1740                 SCTP_INP_RLOCK(inp);
1741                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1742                         SCTP_INP_RUNLOCK(inp);
1743                         continue;
1744                 }
1745                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1746                         SCTP_INP_RUNLOCK(inp);
1747                         continue;
1748                 }
1749                 /*
1750                  * Ok this could be a likely candidate, look at all of its
1751                  * addresses
1752                  */
1753                 if (inp->sctp_lport != lport) {
1754                         SCTP_INP_RUNLOCK(inp);
1755                         continue;
1756                 }
1757                 /* does a VRF id match? */
1758                 fnd = 0;
1759                 if (inp->def_vrf_id == vrf_id)
1760                         fnd = 1;
1761
1762                 if (!fnd) {
1763                         SCTP_INP_RUNLOCK(inp);
1764                         continue;
1765                 }
1766                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1767                         if (laddr->ifa == NULL) {
1768                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1769                                     __func__);
1770                                 continue;
1771                         }
1772                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1773                             (void *)laddr->ifa);
1774                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1775                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1776                                 continue;
1777                         }
1778                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1779                                 /* possible, see if it matches */
1780                                 switch (nam->sa_family) {
1781 #ifdef INET
1782                                 case AF_INET:
1783                                         if (sin->sin_addr.s_addr ==
1784                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1785                                                 SCTP_INP_RUNLOCK(inp);
1786                                                 return (inp);
1787                                         }
1788                                         break;
1789 #endif
1790 #ifdef INET6
1791                                 case AF_INET6:
1792                                         intf_addr6 = &laddr->ifa->address.sin6;
1793                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1794                                             intf_addr6)) {
1795                                                 SCTP_INP_RUNLOCK(inp);
1796                                                 return (inp);
1797                                         }
1798                                         break;
1799 #endif
1800                                 }
1801                         }
1802                 }
1803                 SCTP_INP_RUNLOCK(inp);
1804         }
1805         return (NULL);
1806 }
1807
1808
1809 static struct sctp_inpcb *
1810 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1811 {
1812         struct sctppcbhead *head;
1813         struct sctp_inpcb *t_inp;
1814         int fnd;
1815
1816         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1817             SCTP_BASE_INFO(hashmark))];
1818         LIST_FOREACH(t_inp, head, sctp_hash) {
1819                 if (t_inp->sctp_lport != lport) {
1820                         continue;
1821                 }
1822                 /* is it in the VRF in question */
1823                 fnd = 0;
1824                 if (t_inp->def_vrf_id == vrf_id)
1825                         fnd = 1;
1826                 if (!fnd)
1827                         continue;
1828
1829                 /* This one is in use. */
1830                 /* check the v6/v4 binding issue */
1831                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1832                     SCTP_IPV6_V6ONLY(t_inp)) {
1833                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1834                                 /* collision in V6 space */
1835                                 return (t_inp);
1836                         } else {
1837                                 /* inp is BOUND_V4 no conflict */
1838                                 continue;
1839                         }
1840                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1841                         /* t_inp is bound v4 and v6, conflict always */
1842                         return (t_inp);
1843                 } else {
1844                         /* t_inp is bound only V4 */
1845                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1846                             SCTP_IPV6_V6ONLY(inp)) {
1847                                 /* no conflict */
1848                                 continue;
1849                         }
1850                         /* else fall through to conflict */
1851                 }
1852                 return (t_inp);
1853         }
1854         return (NULL);
1855 }
1856
1857
1858 int
1859 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1860 {
1861         /* For 1-2-1 with port reuse */
1862         struct sctppcbhead *head;
1863         struct sctp_inpcb *tinp, *ninp;
1864
1865         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1866                 /* only works with port reuse on */
1867                 return (-1);
1868         }
1869         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1870                 return (0);
1871         }
1872         SCTP_INP_RUNLOCK(inp);
1873         SCTP_INP_INFO_WLOCK();
1874         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1875             SCTP_BASE_INFO(hashmark))];
1876         /* Kick out all non-listeners to the TCP hash */
1877         LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1878                 if (tinp->sctp_lport != inp->sctp_lport) {
1879                         continue;
1880                 }
1881                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1882                         continue;
1883                 }
1884                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1885                         continue;
1886                 }
1887                 if (tinp->sctp_socket->so_qlimit) {
1888                         continue;
1889                 }
1890                 SCTP_INP_WLOCK(tinp);
1891                 LIST_REMOVE(tinp, sctp_hash);
1892                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1893                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1894                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1895                 SCTP_INP_WUNLOCK(tinp);
1896         }
1897         SCTP_INP_WLOCK(inp);
1898         /* Pull from where he was */
1899         LIST_REMOVE(inp, sctp_hash);
1900         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1901         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1902         LIST_INSERT_HEAD(head, inp, sctp_hash);
1903         SCTP_INP_WUNLOCK(inp);
1904         SCTP_INP_RLOCK(inp);
1905         SCTP_INP_INFO_WUNLOCK();
1906         return (0);
1907 }
1908
1909
1910 struct sctp_inpcb *
1911 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1912     uint32_t vrf_id)
1913 {
1914         /*
1915          * First we check the hash table to see if someone has this port
1916          * bound with just the port.
1917          */
1918         struct sctp_inpcb *inp;
1919         struct sctppcbhead *head;
1920         int lport;
1921         unsigned int i;
1922 #ifdef INET
1923         struct sockaddr_in *sin;
1924 #endif
1925 #ifdef INET6
1926         struct sockaddr_in6 *sin6;
1927 #endif
1928
1929         switch (nam->sa_family) {
1930 #ifdef INET
1931         case AF_INET:
1932                 sin = (struct sockaddr_in *)nam;
1933                 lport = sin->sin_port;
1934                 break;
1935 #endif
1936 #ifdef INET6
1937         case AF_INET6:
1938                 sin6 = (struct sockaddr_in6 *)nam;
1939                 lport = sin6->sin6_port;
1940                 break;
1941 #endif
1942         default:
1943                 return (NULL);
1944         }
1945         /*
1946          * I could cheat here and just cast to one of the types but we will
1947          * do it right. It also provides the check against an Unsupported
1948          * type too.
1949          */
1950         /* Find the head of the ALLADDR chain */
1951         if (have_lock == 0) {
1952                 SCTP_INP_INFO_RLOCK();
1953         }
1954         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1955             SCTP_BASE_INFO(hashmark))];
1956         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1957
1958         /*
1959          * If the TCP model exists it could be that the main listening
1960          * endpoint is gone but there still exists a connected socket for
1961          * this guy. If so we can return the first one that we find. This
1962          * may NOT be the correct one so the caller should be wary on the
1963          * returned INP. Currently the only caller that sets find_tcp_pool
1964          * is in bindx where we are verifying that a user CAN bind the
1965          * address. He either has bound it already, or someone else has, or
1966          * its open to bind, so this is good enough.
1967          */
1968         if (inp == NULL && find_tcp_pool) {
1969                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1970                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1971                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1972                         if (inp) {
1973                                 break;
1974                         }
1975                 }
1976         }
1977         if (inp) {
1978                 SCTP_INP_INCR_REF(inp);
1979         }
1980         if (have_lock == 0) {
1981                 SCTP_INP_INFO_RUNLOCK();
1982         }
1983         return (inp);
1984 }
1985
1986
1987 /*
1988  * Find an association for an endpoint with the pointer to whom you want to
1989  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1990  * need to change the *to to some other struct like a mbuf...
1991  */
1992 struct sctp_tcb *
1993 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
1994     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1995     uint32_t vrf_id)
1996 {
1997         struct sctp_inpcb *inp = NULL;
1998         struct sctp_tcb *stcb;
1999
2000         SCTP_INP_INFO_RLOCK();
2001         if (find_tcp_pool) {
2002                 if (inp_p != NULL) {
2003                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2004                             vrf_id);
2005                 } else {
2006                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2007                             vrf_id);
2008                 }
2009                 if (stcb != NULL) {
2010                         SCTP_INP_INFO_RUNLOCK();
2011                         return (stcb);
2012                 }
2013         }
2014         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2015         if (inp_p != NULL) {
2016                 *inp_p = inp;
2017         }
2018         SCTP_INP_INFO_RUNLOCK();
2019         if (inp == NULL) {
2020                 return (NULL);
2021         }
2022         /*
2023          * ok, we have an endpoint, now lets find the assoc for it (if any)
2024          * we now place the source address or from in the to of the find
2025          * endpoint call. Since in reality this chain is used from the
2026          * inbound packet side.
2027          */
2028         if (inp_p != NULL) {
2029                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2030                     NULL);
2031         } else {
2032                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2033                     NULL);
2034         }
2035         return (stcb);
2036 }
2037
2038
2039 /*
2040  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2041  * find all addresses that the sender has specified in any address list. Each
2042  * address will be used to lookup the TCB and see if one exits.
2043  */
2044 static struct sctp_tcb *
2045 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2046     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2047     struct sockaddr *dst)
2048 {
2049         struct sctp_paramhdr *phdr, parm_buf;
2050 #if defined(INET) || defined(INET6)
2051         struct sctp_tcb *stcb;
2052         uint16_t ptype;
2053 #endif
2054         uint16_t plen;
2055 #ifdef INET
2056         struct sockaddr_in sin4;
2057 #endif
2058 #ifdef INET6
2059         struct sockaddr_in6 sin6;
2060 #endif
2061
2062 #ifdef INET
2063         memset(&sin4, 0, sizeof(sin4));
2064         sin4.sin_len = sizeof(sin4);
2065         sin4.sin_family = AF_INET;
2066         sin4.sin_port = sh->src_port;
2067 #endif
2068 #ifdef INET6
2069         memset(&sin6, 0, sizeof(sin6));
2070         sin6.sin6_len = sizeof(sin6);
2071         sin6.sin6_family = AF_INET6;
2072         sin6.sin6_port = sh->src_port;
2073 #endif
2074
2075         offset += sizeof(struct sctp_init_chunk);
2076
2077         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
2078         while (phdr != NULL) {
2079                 /* now we must see if we want the parameter */
2080 #if defined(INET) || defined(INET6)
2081                 ptype = ntohs(phdr->param_type);
2082 #endif
2083                 plen = ntohs(phdr->param_length);
2084                 if (plen == 0) {
2085                         break;
2086                 }
2087 #ifdef INET
2088                 if (ptype == SCTP_IPV4_ADDRESS &&
2089                     plen == sizeof(struct sctp_ipv4addr_param)) {
2090                         /* Get the rest of the address */
2091                         struct sctp_ipv4addr_param ip4_parm, *p4;
2092
2093                         phdr = sctp_get_next_param(m, offset,
2094                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2095                         if (phdr == NULL) {
2096                                 return (NULL);
2097                         }
2098                         p4 = (struct sctp_ipv4addr_param *)phdr;
2099                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2100                         /* look it up */
2101                         stcb = sctp_findassociation_ep_addr(inp_p,
2102                             (struct sockaddr *)&sin4, netp, dst, NULL);
2103                         if (stcb != NULL) {
2104                                 return (stcb);
2105                         }
2106                 }
2107 #endif
2108 #ifdef INET6
2109                 if (ptype == SCTP_IPV6_ADDRESS &&
2110                     plen == sizeof(struct sctp_ipv6addr_param)) {
2111                         /* Get the rest of the address */
2112                         struct sctp_ipv6addr_param ip6_parm, *p6;
2113
2114                         phdr = sctp_get_next_param(m, offset,
2115                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
2116                         if (phdr == NULL) {
2117                                 return (NULL);
2118                         }
2119                         p6 = (struct sctp_ipv6addr_param *)phdr;
2120                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2121                         /* look it up */
2122                         stcb = sctp_findassociation_ep_addr(inp_p,
2123                             (struct sockaddr *)&sin6, netp, dst, NULL);
2124                         if (stcb != NULL) {
2125                                 return (stcb);
2126                         }
2127                 }
2128 #endif
2129                 offset += SCTP_SIZE32(plen);
2130                 phdr = sctp_get_next_param(m, offset, &parm_buf,
2131                     sizeof(parm_buf));
2132         }
2133         return (NULL);
2134 }
2135
2136 static struct sctp_tcb *
2137 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2138     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2139     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2140 {
2141         /*
2142          * Use my vtag to hash. If we find it we then verify the source addr
2143          * is in the assoc. If all goes well we save a bit on rec of a
2144          * packet.
2145          */
2146         struct sctpasochead *head;
2147         struct sctp_nets *net;
2148         struct sctp_tcb *stcb;
2149
2150         SCTP_INP_INFO_RLOCK();
2151         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2152             SCTP_BASE_INFO(hashasocmark))];
2153         LIST_FOREACH(stcb, head, sctp_asocs) {
2154                 SCTP_INP_RLOCK(stcb->sctp_ep);
2155                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2156                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2157                         continue;
2158                 }
2159                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2160                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2161                         continue;
2162                 }
2163                 SCTP_TCB_LOCK(stcb);
2164                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2165                 if (stcb->asoc.my_vtag == vtag) {
2166                         /* candidate */
2167                         if (stcb->rport != rport) {
2168                                 SCTP_TCB_UNLOCK(stcb);
2169                                 continue;
2170                         }
2171                         if (stcb->sctp_ep->sctp_lport != lport) {
2172                                 SCTP_TCB_UNLOCK(stcb);
2173                                 continue;
2174                         }
2175                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2176                                 SCTP_TCB_UNLOCK(stcb);
2177                                 continue;
2178                         }
2179                         /* RRS:Need toaddr check here */
2180                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2181                                 /* Endpoint does not own this address */
2182                                 SCTP_TCB_UNLOCK(stcb);
2183                                 continue;
2184                         }
2185                         if (remote_tag) {
2186                                 /*
2187                                  * If we have both vtags that's all we match
2188                                  * on
2189                                  */
2190                                 if (stcb->asoc.peer_vtag == remote_tag) {
2191                                         /*
2192                                          * If both tags match we consider it
2193                                          * conclusive and check NO
2194                                          * source/destination addresses
2195                                          */
2196                                         goto conclusive;
2197                                 }
2198                         }
2199                         if (skip_src_check) {
2200                 conclusive:
2201                                 if (from) {
2202                                         *netp = sctp_findnet(stcb, from);
2203                                 } else {
2204                                         *netp = NULL;   /* unknown */
2205                                 }
2206                                 if (inp_p)
2207                                         *inp_p = stcb->sctp_ep;
2208                                 SCTP_INP_INFO_RUNLOCK();
2209                                 return (stcb);
2210                         }
2211                         net = sctp_findnet(stcb, from);
2212                         if (net) {
2213                                 /* yep its him. */
2214                                 *netp = net;
2215                                 SCTP_STAT_INCR(sctps_vtagexpress);
2216                                 *inp_p = stcb->sctp_ep;
2217                                 SCTP_INP_INFO_RUNLOCK();
2218                                 return (stcb);
2219                         } else {
2220                                 /*
2221                                  * not him, this should only happen in rare
2222                                  * cases so I peg it.
2223                                  */
2224                                 SCTP_STAT_INCR(sctps_vtagbogus);
2225                         }
2226                 }
2227                 SCTP_TCB_UNLOCK(stcb);
2228         }
2229         SCTP_INP_INFO_RUNLOCK();
2230         return (NULL);
2231 }
2232
2233
2234 /*
2235  * Find an association with the pointer to the inbound IP packet. This can be
2236  * a IPv4 or IPv6 packet.
2237  */
2238 struct sctp_tcb *
2239 sctp_findassociation_addr(struct mbuf *m, int offset,
2240     struct sockaddr *src, struct sockaddr *dst,
2241     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2242     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2243 {
2244         struct sctp_tcb *stcb;
2245         struct sctp_inpcb *inp;
2246
2247         if (sh->v_tag) {
2248                 /* we only go down this path if vtag is non-zero */
2249                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2250                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2251                 if (stcb) {
2252                         return (stcb);
2253                 }
2254         }
2255         if (inp_p) {
2256                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2257                     1, vrf_id);
2258                 inp = *inp_p;
2259         } else {
2260                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2261                     1, vrf_id);
2262         }
2263         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2264         if (stcb == NULL && inp) {
2265                 /* Found a EP but not this address */
2266                 if ((ch->chunk_type == SCTP_INITIATION) ||
2267                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2268                         /*-
2269                          * special hook, we do NOT return linp or an
2270                          * association that is linked to an existing
2271                          * association that is under the TCP pool (i.e. no
2272                          * listener exists). The endpoint finding routine
2273                          * will always find a listener before examining the
2274                          * TCP pool.
2275                          */
2276                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2277                                 if (inp_p) {
2278                                         *inp_p = NULL;
2279                                 }
2280                                 return (NULL);
2281                         }
2282                         stcb = sctp_findassociation_special_addr(m,
2283                             offset, sh, &inp, netp, dst);
2284                         if (inp_p != NULL) {
2285                                 *inp_p = inp;
2286                         }
2287                 }
2288         }
2289         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2290         return (stcb);
2291 }
2292
2293 /*
2294  * lookup an association by an ASCONF lookup address.
2295  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2296  */
2297 struct sctp_tcb *
2298 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2299     struct sockaddr *dst, struct sctphdr *sh,
2300     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2301 {
2302         struct sctp_tcb *stcb;
2303         union sctp_sockstore remote_store;
2304         struct sctp_paramhdr parm_buf, *phdr;
2305         int ptype;
2306         int zero_address = 0;
2307 #ifdef INET
2308         struct sockaddr_in *sin;
2309 #endif
2310 #ifdef INET6
2311         struct sockaddr_in6 *sin6;
2312 #endif
2313
2314         memset(&remote_store, 0, sizeof(remote_store));
2315         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2316             &parm_buf, sizeof(struct sctp_paramhdr));
2317         if (phdr == NULL) {
2318                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2319                     __func__);
2320                 return NULL;
2321         }
2322         ptype = (int)((uint32_t)ntohs(phdr->param_type));
2323         /* get the correlation address */
2324         switch (ptype) {
2325 #ifdef INET6
2326         case SCTP_IPV6_ADDRESS:
2327                 {
2328                         /* ipv6 address param */
2329                         struct sctp_ipv6addr_param *p6, p6_buf;
2330
2331                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2332                                 return NULL;
2333                         }
2334                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2335                             offset + sizeof(struct sctp_asconf_chunk),
2336                             &p6_buf.ph, sizeof(*p6));
2337                         if (p6 == NULL) {
2338                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2339                                     __func__);
2340                                 return (NULL);
2341                         }
2342                         sin6 = &remote_store.sin6;
2343                         sin6->sin6_family = AF_INET6;
2344                         sin6->sin6_len = sizeof(*sin6);
2345                         sin6->sin6_port = sh->src_port;
2346                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2347                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2348                                 zero_address = 1;
2349                         break;
2350                 }
2351 #endif
2352 #ifdef INET
2353         case SCTP_IPV4_ADDRESS:
2354                 {
2355                         /* ipv4 address param */
2356                         struct sctp_ipv4addr_param *p4, p4_buf;
2357
2358                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2359                                 return NULL;
2360                         }
2361                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2362                             offset + sizeof(struct sctp_asconf_chunk),
2363                             &p4_buf.ph, sizeof(*p4));
2364                         if (p4 == NULL) {
2365                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2366                                     __func__);
2367                                 return (NULL);
2368                         }
2369                         sin = &remote_store.sin;
2370                         sin->sin_family = AF_INET;
2371                         sin->sin_len = sizeof(*sin);
2372                         sin->sin_port = sh->src_port;
2373                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2374                         if (sin->sin_addr.s_addr == INADDR_ANY)
2375                                 zero_address = 1;
2376                         break;
2377                 }
2378 #endif
2379         default:
2380                 /* invalid address param type */
2381                 return NULL;
2382         }
2383
2384         if (zero_address) {
2385                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2386                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2387                 if (stcb != NULL) {
2388                         SCTP_INP_DECR_REF(*inp_p);
2389                 }
2390         } else {
2391                 stcb = sctp_findassociation_ep_addr(inp_p,
2392                     &remote_store.sa, netp,
2393                     dst, NULL);
2394         }
2395         return (stcb);
2396 }
2397
2398
2399 /*
2400  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2401  * addresses. This way if we don't get a bind we by default pick a ephemeral
2402  * port with all addresses bound.
2403  */
2404 int
2405 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2406 {
2407         /*
2408          * we get called when a new endpoint starts up. We need to allocate
2409          * the sctp_inpcb structure from the zone and init it. Mark it as
2410          * unbound and find a port that we can use as an ephemeral with
2411          * INADDR_ANY. If the user binds later no problem we can then add in
2412          * the specific addresses. And setup the default parameters for the
2413          * EP.
2414          */
2415         int i, error;
2416         struct sctp_inpcb *inp;
2417         struct sctp_pcb *m;
2418         struct timeval time;
2419         sctp_sharedkey_t *null_key;
2420
2421         error = 0;
2422
2423         SCTP_INP_INFO_WLOCK();
2424         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2425         if (inp == NULL) {
2426                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2427                 SCTP_INP_INFO_WUNLOCK();
2428                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2429                 return (ENOBUFS);
2430         }
2431         /* zap it */
2432         bzero(inp, sizeof(*inp));
2433
2434         /* bump generations */
2435         /* setup socket pointers */
2436         inp->sctp_socket = so;
2437         inp->ip_inp.inp.inp_socket = so;
2438         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2439 #ifdef INET6
2440         if (INP_SOCKAF(so) == AF_INET6) {
2441                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2442                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2443                 }
2444                 if (MODULE_GLOBAL(ip6_v6only)) {
2445                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2446                 }
2447         }
2448 #endif
2449         inp->sctp_associd_counter = 1;
2450         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2451         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2452         inp->max_cwnd = 0;
2453         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2454         inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable);
2455         inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable);
2456         inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable);
2457         inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable);
2458         inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2459         inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2460         inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2461         inp->idata_supported = 0;
2462
2463         inp->fibnum = so->so_fibnum;
2464         /* init the small hash table we use to track asocid <-> tcb */
2465         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2466         if (inp->sctp_asocidhash == NULL) {
2467                 crfree(inp->ip_inp.inp.inp_cred);
2468                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2469                 SCTP_INP_INFO_WUNLOCK();
2470                 return (ENOBUFS);
2471         }
2472         SCTP_INCR_EP_COUNT();
2473         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2474         SCTP_INP_INFO_WUNLOCK();
2475
2476         so->so_pcb = (caddr_t)inp;
2477
2478         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2479                 /* UDP style socket */
2480                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2481                     SCTP_PCB_FLAGS_UNBOUND);
2482                 /* Be sure it is NON-BLOCKING IO for UDP */
2483                 /* SCTP_SET_SO_NBIO(so); */
2484         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2485                 /* TCP style socket */
2486                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2487                     SCTP_PCB_FLAGS_UNBOUND);
2488                 /* Be sure we have blocking IO by default */
2489                 SCTP_CLEAR_SO_NBIO(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         /* Add adaptation cookie */
2581         m->adaptation_layer_indicator = 0;
2582         m->adaptation_layer_indicator_provided = 0;
2583
2584         /* seed random number generator */
2585         m->random_counter = 1;
2586         m->store_at = SCTP_SIGNATURE_SIZE;
2587         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2588         sctp_fill_random_store(m);
2589
2590         /* Minimum cookie size */
2591         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2592             sizeof(struct sctp_state_cookie);
2593         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2594
2595         /* Setup the initial secret */
2596         (void)SCTP_GETTIME_TIMEVAL(&time);
2597         m->time_of_secret_change = time.tv_sec;
2598
2599         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2600                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2601         }
2602         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2603
2604         /* How long is a cookie good for ? */
2605         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2606         /*
2607          * Initialize authentication parameters
2608          */
2609         m->local_hmacs = sctp_default_supported_hmaclist();
2610         m->local_auth_chunks = sctp_alloc_chunklist();
2611         if (inp->asconf_supported) {
2612                 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2613                 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2614         }
2615         m->default_dscp = 0;
2616 #ifdef INET6
2617         m->default_flowlabel = 0;
2618 #endif
2619         m->port = 0;            /* encapsulation disabled by default */
2620         LIST_INIT(&m->shared_keys);
2621         /* add default NULL key as key id 0 */
2622         null_key = sctp_alloc_sharedkey();
2623         sctp_insert_sharedkey(&m->shared_keys, null_key);
2624         SCTP_INP_WUNLOCK(inp);
2625 #ifdef SCTP_LOG_CLOSING
2626         sctp_log_closing(inp, NULL, 12);
2627 #endif
2628         return (error);
2629 }
2630
2631
2632 void
2633 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2634     struct sctp_tcb *stcb)
2635 {
2636         struct sctp_nets *net;
2637         uint16_t lport, rport;
2638         struct sctppcbhead *head;
2639         struct sctp_laddr *laddr, *oladdr;
2640
2641         atomic_add_int(&stcb->asoc.refcnt, 1);
2642         SCTP_TCB_UNLOCK(stcb);
2643         SCTP_INP_INFO_WLOCK();
2644         SCTP_INP_WLOCK(old_inp);
2645         SCTP_INP_WLOCK(new_inp);
2646         SCTP_TCB_LOCK(stcb);
2647         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2648
2649         new_inp->sctp_ep.time_of_secret_change =
2650             old_inp->sctp_ep.time_of_secret_change;
2651         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2652             sizeof(old_inp->sctp_ep.secret_key));
2653         new_inp->sctp_ep.current_secret_number =
2654             old_inp->sctp_ep.current_secret_number;
2655         new_inp->sctp_ep.last_secret_number =
2656             old_inp->sctp_ep.last_secret_number;
2657         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2658
2659         /* make it so new data pours into the new socket */
2660         stcb->sctp_socket = new_inp->sctp_socket;
2661         stcb->sctp_ep = new_inp;
2662
2663         /* Copy the port across */
2664         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2665         rport = stcb->rport;
2666         /* Pull the tcb from the old association */
2667         LIST_REMOVE(stcb, sctp_tcbhash);
2668         LIST_REMOVE(stcb, sctp_tcblist);
2669         if (stcb->asoc.in_asocid_hash) {
2670                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2671         }
2672         /* Now insert the new_inp into the TCP connected hash */
2673         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2674
2675         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2676         /* Its safe to access */
2677         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2678
2679         /* Now move the tcb into the endpoint list */
2680         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2681         /*
2682          * Question, do we even need to worry about the ep-hash since we
2683          * only have one connection? Probably not :> so lets get rid of it
2684          * and not suck up any kernel memory in that.
2685          */
2686         if (stcb->asoc.in_asocid_hash) {
2687                 struct sctpasochead *lhd;
2688
2689                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2690                     new_inp->hashasocidmark)];
2691                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2692         }
2693         /* Ok. Let's restart timer. */
2694         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2695                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2696                     stcb, net);
2697         }
2698
2699         SCTP_INP_INFO_WUNLOCK();
2700         if (new_inp->sctp_tcbhash != NULL) {
2701                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2702                 new_inp->sctp_tcbhash = NULL;
2703         }
2704         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2705                 /* Subset bound, so copy in the laddr list from the old_inp */
2706                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2707                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2708                         if (laddr == NULL) {
2709                                 /*
2710                                  * Gak, what can we do? This assoc is really
2711                                  * HOSED. We probably should send an abort
2712                                  * here.
2713                                  */
2714                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2715                                 continue;
2716                         }
2717                         SCTP_INCR_LADDR_COUNT();
2718                         bzero(laddr, sizeof(*laddr));
2719                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2720                         laddr->ifa = oladdr->ifa;
2721                         atomic_add_int(&laddr->ifa->refcount, 1);
2722                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2723                             sctp_nxt_addr);
2724                         new_inp->laddr_count++;
2725                         if (oladdr == stcb->asoc.last_used_address) {
2726                                 stcb->asoc.last_used_address = laddr;
2727                         }
2728                 }
2729         }
2730         /*
2731          * Now any running timers need to be adjusted since we really don't
2732          * care if they are running or not just blast in the new_inp into
2733          * all of them.
2734          */
2735
2736         stcb->asoc.dack_timer.ep = (void *)new_inp;
2737         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2738         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2739         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2740         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2741         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2742         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2743         /* now what about the nets? */
2744         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2745                 net->pmtu_timer.ep = (void *)new_inp;
2746                 net->hb_timer.ep = (void *)new_inp;
2747                 net->rxt_timer.ep = (void *)new_inp;
2748         }
2749         SCTP_INP_WUNLOCK(new_inp);
2750         SCTP_INP_WUNLOCK(old_inp);
2751 }
2752
2753 /*
2754  * insert an laddr entry with the given ifa for the desired list
2755  */
2756 static int
2757 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2758 {
2759         struct sctp_laddr *laddr;
2760
2761         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2762         if (laddr == NULL) {
2763                 /* out of memory? */
2764                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2765                 return (EINVAL);
2766         }
2767         SCTP_INCR_LADDR_COUNT();
2768         bzero(laddr, sizeof(*laddr));
2769         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2770         laddr->ifa = ifa;
2771         laddr->action = act;
2772         atomic_add_int(&ifa->refcount, 1);
2773         /* insert it */
2774         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2775
2776         return (0);
2777 }
2778
2779 /*
2780  * Remove an laddr entry from the local address list (on an assoc)
2781  */
2782 static void
2783 sctp_remove_laddr(struct sctp_laddr *laddr)
2784 {
2785
2786         /* remove from the list */
2787         LIST_REMOVE(laddr, sctp_nxt_addr);
2788         sctp_free_ifa(laddr->ifa);
2789         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2790         SCTP_DECR_LADDR_COUNT();
2791 }
2792
2793
2794
2795 /* sctp_ifap is used to bypass normal local address validation checks */
2796 int
2797 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2798     struct sctp_ifa *sctp_ifap, struct thread *p)
2799 {
2800         /* bind a ep to a socket address */
2801         struct sctppcbhead *head;
2802         struct sctp_inpcb *inp, *inp_tmp;
2803         struct inpcb *ip_inp;
2804         int port_reuse_active = 0;
2805         int bindall;
2806         uint16_t lport;
2807         int error;
2808         uint32_t vrf_id;
2809
2810         lport = 0;
2811         bindall = 1;
2812         inp = (struct sctp_inpcb *)so->so_pcb;
2813         ip_inp = (struct inpcb *)so->so_pcb;
2814 #ifdef SCTP_DEBUG
2815         if (addr) {
2816                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2817                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2818                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2819                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2820         }
2821 #endif
2822         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2823                 /* already did a bind, subsequent binds NOT allowed ! */
2824                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2825                 return (EINVAL);
2826         }
2827 #ifdef INVARIANTS
2828         if (p == NULL)
2829                 panic("null proc/thread");
2830 #endif
2831         if (addr != NULL) {
2832                 switch (addr->sa_family) {
2833 #ifdef INET
2834                 case AF_INET:
2835                         {
2836                                 struct sockaddr_in *sin;
2837
2838                                 /* IPV6_V6ONLY socket? */
2839                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2840                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2841                                         return (EINVAL);
2842                                 }
2843                                 if (addr->sa_len != sizeof(*sin)) {
2844                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2845                                         return (EINVAL);
2846                                 }
2847                                 sin = (struct sockaddr_in *)addr;
2848                                 lport = sin->sin_port;
2849                                 /*
2850                                  * For LOOPBACK the prison_local_ip4() call
2851                                  * will transmute the ip address to the
2852                                  * proper value.
2853                                  */
2854                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2855                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2856                                         return (error);
2857                                 }
2858                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2859                                         bindall = 0;
2860                                 }
2861                                 break;
2862                         }
2863 #endif
2864 #ifdef INET6
2865                 case AF_INET6:
2866                         {
2867                                 /*
2868                                  * Only for pure IPv6 Address. (No IPv4
2869                                  * Mapped!)
2870                                  */
2871                                 struct sockaddr_in6 *sin6;
2872
2873                                 sin6 = (struct sockaddr_in6 *)addr;
2874
2875                                 if (addr->sa_len != sizeof(*sin6)) {
2876                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2877                                         return (EINVAL);
2878                                 }
2879                                 lport = sin6->sin6_port;
2880                                 /*
2881                                  * For LOOPBACK the prison_local_ip6() call
2882                                  * will transmute the ipv6 address to the
2883                                  * proper value.
2884                                  */
2885                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2886                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2887                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2888                                         return (error);
2889                                 }
2890                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2891                                         bindall = 0;
2892                                         /* KAME hack: embed scopeid */
2893                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2894                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2895                                                 return (EINVAL);
2896                                         }
2897                                 }
2898                                 /* this must be cleared for ifa_ifwithaddr() */
2899                                 sin6->sin6_scope_id = 0;
2900                                 break;
2901                         }
2902 #endif
2903                 default:
2904                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2905                         return (EAFNOSUPPORT);
2906                 }
2907         }
2908         SCTP_INP_INFO_WLOCK();
2909         SCTP_INP_WLOCK(inp);
2910         /* Setup a vrf_id to be the default for the non-bind-all case. */
2911         vrf_id = inp->def_vrf_id;
2912
2913         /* increase our count due to the unlock we do */
2914         SCTP_INP_INCR_REF(inp);
2915         if (lport) {
2916                 /*
2917                  * Did the caller specify a port? if so we must see if an ep
2918                  * already has this one bound.
2919                  */
2920                 /* got to be root to get at low ports */
2921                 if (ntohs(lport) < IPPORT_RESERVED) {
2922                         if (p && (error =
2923                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2924                             )) {
2925                                 SCTP_INP_DECR_REF(inp);
2926                                 SCTP_INP_WUNLOCK(inp);
2927                                 SCTP_INP_INFO_WUNLOCK();
2928                                 return (error);
2929                         }
2930                 }
2931                 SCTP_INP_WUNLOCK(inp);
2932                 if (bindall) {
2933                         vrf_id = inp->def_vrf_id;
2934                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2935                         if (inp_tmp != NULL) {
2936                                 /*
2937                                  * lock guy returned and lower count note
2938                                  * that we are not bound so inp_tmp should
2939                                  * NEVER be inp. And it is this inp
2940                                  * (inp_tmp) that gets the reference bump,
2941                                  * so we must lower it.
2942                                  */
2943                                 SCTP_INP_DECR_REF(inp_tmp);
2944                                 /* unlock info */
2945                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2946                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2947                                         /*
2948                                          * Ok, must be one-2-one and
2949                                          * allowing port re-use
2950                                          */
2951                                         port_reuse_active = 1;
2952                                         goto continue_anyway;
2953                                 }
2954                                 SCTP_INP_DECR_REF(inp);
2955                                 SCTP_INP_INFO_WUNLOCK();
2956                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2957                                 return (EADDRINUSE);
2958                         }
2959                 } else {
2960                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2961                         if (inp_tmp != NULL) {
2962                                 /*
2963                                  * lock guy returned and lower count note
2964                                  * that we are not bound so inp_tmp should
2965                                  * NEVER be inp. And it is this inp
2966                                  * (inp_tmp) that gets the reference bump,
2967                                  * so we must lower it.
2968                                  */
2969                                 SCTP_INP_DECR_REF(inp_tmp);
2970                                 /* unlock info */
2971                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2972                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2973                                         /*
2974                                          * Ok, must be one-2-one and
2975                                          * allowing port re-use
2976                                          */
2977                                         port_reuse_active = 1;
2978                                         goto continue_anyway;
2979                                 }
2980                                 SCTP_INP_DECR_REF(inp);
2981                                 SCTP_INP_INFO_WUNLOCK();
2982                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2983                                 return (EADDRINUSE);
2984                         }
2985                 }
2986 continue_anyway:
2987                 SCTP_INP_WLOCK(inp);
2988                 if (bindall) {
2989                         /* verify that no lport is not used by a singleton */
2990                         if ((port_reuse_active == 0) &&
2991                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
2992                                 /* Sorry someone already has this one bound */
2993                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2994                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2995                                         port_reuse_active = 1;
2996                                 } else {
2997                                         SCTP_INP_DECR_REF(inp);
2998                                         SCTP_INP_WUNLOCK(inp);
2999                                         SCTP_INP_INFO_WUNLOCK();
3000                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3001                                         return (EADDRINUSE);
3002                                 }
3003                         }
3004                 }
3005         } else {
3006                 uint16_t first, last, candidate;
3007                 uint16_t count;
3008                 int done;
3009
3010                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3011                         first = MODULE_GLOBAL(ipport_hifirstauto);
3012                         last = MODULE_GLOBAL(ipport_hilastauto);
3013                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3014                         if (p && (error =
3015                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3016                             )) {
3017                                 SCTP_INP_DECR_REF(inp);
3018                                 SCTP_INP_WUNLOCK(inp);
3019                                 SCTP_INP_INFO_WUNLOCK();
3020                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3021                                 return (error);
3022                         }
3023                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3024                         last = MODULE_GLOBAL(ipport_lowlastauto);
3025                 } else {
3026                         first = MODULE_GLOBAL(ipport_firstauto);
3027                         last = MODULE_GLOBAL(ipport_lastauto);
3028                 }
3029                 if (first > last) {
3030                         uint16_t temp;
3031
3032                         temp = first;
3033                         first = last;
3034                         last = temp;
3035                 }
3036                 count = last - first + 1;       /* number of candidates */
3037                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3038
3039                 done = 0;
3040                 while (!done) {
3041                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3042                                 done = 1;
3043                         }
3044                         if (!done) {
3045                                 if (--count == 0) {
3046                                         SCTP_INP_DECR_REF(inp);
3047                                         SCTP_INP_WUNLOCK(inp);
3048                                         SCTP_INP_INFO_WUNLOCK();
3049                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3050                                         return (EADDRINUSE);
3051                                 }
3052                                 if (candidate == last)
3053                                         candidate = first;
3054                                 else
3055                                         candidate = candidate + 1;
3056                         }
3057                 }
3058                 lport = htons(candidate);
3059         }
3060         SCTP_INP_DECR_REF(inp);
3061         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3062             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3063                 /*
3064                  * this really should not happen. The guy did a non-blocking
3065                  * bind and then did a close at the same time.
3066                  */
3067                 SCTP_INP_WUNLOCK(inp);
3068                 SCTP_INP_INFO_WUNLOCK();
3069                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3070                 return (EINVAL);
3071         }
3072         /* ok we look clear to give out this port, so lets setup the binding */
3073         if (bindall) {
3074                 /* binding to all addresses, so just set in the proper flags */
3075                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3076                 /* set the automatic addr changes from kernel flag */
3077                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3078                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3079                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3080                 } else {
3081                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3082                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3083                 }
3084                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3085                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3086                 } else {
3087                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3088                 }
3089                 /*
3090                  * set the automatic mobility_base from kernel flag (by
3091                  * micchie)
3092                  */
3093                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3094                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3095                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3096                 } else {
3097                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3098                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3099                 }
3100                 /*
3101                  * set the automatic mobility_fasthandoff from kernel flag
3102                  * (by micchie)
3103                  */
3104                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3105                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3106                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3107                 } else {
3108                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3109                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3110                 }
3111         } else {
3112                 /*
3113                  * bind specific, make sure flags is off and add a new
3114                  * address structure to the sctp_addr_list inside the ep
3115                  * structure.
3116                  *
3117                  * We will need to allocate one and insert it at the head.
3118                  * The socketopt call can just insert new addresses in there
3119                  * as well. It will also have to do the embed scope kame
3120                  * hack too (before adding).
3121                  */
3122                 struct sctp_ifa *ifa;
3123                 union sctp_sockstore store;
3124
3125                 memset(&store, 0, sizeof(store));
3126                 switch (addr->sa_family) {
3127 #ifdef INET
3128                 case AF_INET:
3129                         memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3130                         store.sin.sin_port = 0;
3131                         break;
3132 #endif
3133 #ifdef INET6
3134                 case AF_INET6:
3135                         memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3136                         store.sin6.sin6_port = 0;
3137                         break;
3138 #endif
3139                 default:
3140                         break;
3141                 }
3142                 /*
3143                  * first find the interface with the bound address need to
3144                  * zero out the port to find the address! yuck! can't do
3145                  * this earlier since need port for sctp_pcb_findep()
3146                  */
3147                 if (sctp_ifap != NULL) {
3148                         ifa = sctp_ifap;
3149                 } else {
3150                         /*
3151                          * Note for BSD we hit here always other O/S's will
3152                          * pass things in via the sctp_ifap argument
3153                          * (Panda).
3154                          */
3155                         ifa = sctp_find_ifa_by_addr(&store.sa,
3156                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3157                 }
3158                 if (ifa == NULL) {
3159                         /* Can't find an interface with that address */
3160                         SCTP_INP_WUNLOCK(inp);
3161                         SCTP_INP_INFO_WUNLOCK();
3162                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3163                         return (EADDRNOTAVAIL);
3164                 }
3165 #ifdef INET6
3166                 if (addr->sa_family == AF_INET6) {
3167                         /* GAK, more FIXME IFA lock? */
3168                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3169                                 /* Can't bind a non-existent addr. */
3170                                 SCTP_INP_WUNLOCK(inp);
3171                                 SCTP_INP_INFO_WUNLOCK();
3172                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3173                                 return (EINVAL);
3174                         }
3175                 }
3176 #endif
3177                 /* we're not bound all */
3178                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3179                 /* allow bindx() to send ASCONF's for binding changes */
3180                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3181                 /* clear automatic addr changes from kernel flag */
3182                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3183
3184                 /* add this address to the endpoint list */
3185                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3186                 if (error != 0) {
3187                         SCTP_INP_WUNLOCK(inp);
3188                         SCTP_INP_INFO_WUNLOCK();
3189                         return (error);
3190                 }
3191                 inp->laddr_count++;
3192         }
3193         /* find the bucket */
3194         if (port_reuse_active) {
3195                 /* Put it into tcp 1-2-1 hash */
3196                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3197                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3198         } else {
3199                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3200         }
3201         /* put it in the bucket */
3202         LIST_INSERT_HEAD(head, inp, sctp_hash);
3203         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3204             (void *)head, ntohs(lport), port_reuse_active);
3205         /* set in the port */
3206         inp->sctp_lport = lport;
3207
3208         /* turn off just the unbound flag */
3209         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3210         SCTP_INP_WUNLOCK(inp);
3211         SCTP_INP_INFO_WUNLOCK();
3212         return (0);
3213 }
3214
3215
3216 static void
3217 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3218 {
3219         struct sctp_iterator *it, *nit;
3220
3221         /*
3222          * We enter with the only the ITERATOR_LOCK in place and a write
3223          * lock on the inp_info stuff.
3224          */
3225         it = sctp_it_ctl.cur_it;
3226         if (it && (it->vn != curvnet)) {
3227                 /* Its not looking at our VNET */
3228                 return;
3229         }
3230         if (it && (it->inp == inp)) {
3231                 /*
3232                  * This is tricky and we hold the iterator lock, but when it
3233                  * returns and gets the lock (when we release it) the
3234                  * iterator will try to operate on inp. We need to stop that
3235                  * from happening. But of course the iterator has a
3236                  * reference on the stcb and inp. We can mark it and it will
3237                  * stop.
3238                  *
3239                  * If its a single iterator situation, we set the end
3240                  * iterator flag. Otherwise we set the iterator to go to the
3241                  * next inp.
3242                  *
3243                  */
3244                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3245                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3246                 } else {
3247                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3248                 }
3249         }
3250         /*
3251          * Now go through and remove any single reference to our inp that
3252          * may be still pending on the list
3253          */
3254         SCTP_IPI_ITERATOR_WQ_LOCK();
3255         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3256                 if (it->vn != curvnet) {
3257                         continue;
3258                 }
3259                 if (it->inp == inp) {
3260                         /* This one points to me is it inp specific? */
3261                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3262                                 /* Remove and free this one */
3263                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3264                                     it, sctp_nxt_itr);
3265                                 if (it->function_atend != NULL) {
3266                                         (*it->function_atend) (it->pointer, it->val);
3267                                 }
3268                                 SCTP_FREE(it, SCTP_M_ITER);
3269                         } else {
3270                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3271                                 if (it->inp) {
3272                                         SCTP_INP_INCR_REF(it->inp);
3273                                 }
3274                         }
3275                         /*
3276                          * When its put in the refcnt is incremented so decr
3277                          * it
3278                          */
3279                         SCTP_INP_DECR_REF(inp);
3280                 }
3281         }
3282         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3283 }
3284
3285 /* release sctp_inpcb unbind the port */
3286 void
3287 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3288 {
3289         /*
3290          * Here we free a endpoint. We must find it (if it is in the Hash
3291          * table) and remove it from there. Then we must also find it in the
3292          * overall list and remove it from there. After all removals are
3293          * complete then any timer has to be stopped. Then start the actual
3294          * freeing. a) Any local lists. b) Any associations. c) The hash of
3295          * all associations. d) finally the ep itself.
3296          */
3297         struct sctp_tcb *asoc, *nasoc;
3298         struct sctp_laddr *laddr, *nladdr;
3299         struct inpcb *ip_pcb;
3300         struct socket *so;
3301         int being_refed = 0;
3302         struct sctp_queued_to_read *sq, *nsq;
3303         int cnt;
3304         sctp_sharedkey_t *shared_key, *nshared_key;
3305
3306
3307 #ifdef SCTP_LOG_CLOSING
3308         sctp_log_closing(inp, NULL, 0);
3309 #endif
3310         SCTP_ITERATOR_LOCK();
3311         /* mark any iterators on the list or being processed */
3312         sctp_iterator_inp_being_freed(inp);
3313         SCTP_ITERATOR_UNLOCK();
3314         so = inp->sctp_socket;
3315         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3316                 /* been here before.. eeks.. get out of here */
3317                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3318 #ifdef SCTP_LOG_CLOSING
3319                 sctp_log_closing(inp, NULL, 1);
3320 #endif
3321                 return;
3322         }
3323         SCTP_ASOC_CREATE_LOCK(inp);
3324         SCTP_INP_INFO_WLOCK();
3325
3326         SCTP_INP_WLOCK(inp);
3327         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3328                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3329                 /* socket is gone, so no more wakeups allowed */
3330                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3331                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3332                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3333
3334         }
3335         /* First time through we have the socket lock, after that no more. */
3336         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3337             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3338
3339         if (inp->control) {
3340                 sctp_m_freem(inp->control);
3341                 inp->control = NULL;
3342         }
3343         if (inp->pkt) {
3344                 sctp_m_freem(inp->pkt);
3345                 inp->pkt = NULL;
3346         }
3347         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3348                                          * here but I will be nice :> (i.e.
3349                                          * ip_pcb = ep;) */
3350         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3351                 int cnt_in_sd;
3352
3353                 cnt_in_sd = 0;
3354                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3355                         SCTP_TCB_LOCK(asoc);
3356                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3357                                 /* Skip guys being freed */
3358                                 cnt_in_sd++;
3359                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3360                                         /*
3361                                          * Special case - we did not start a
3362                                          * kill timer on the asoc due to it
3363                                          * was not closed. So go ahead and
3364                                          * start it now.
3365                                          */
3366                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3367                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3368                                 }
3369                                 SCTP_TCB_UNLOCK(asoc);
3370                                 continue;
3371                         }
3372                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3373                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3374                             (asoc->asoc.total_output_queue_size == 0)) {
3375                                 /*
3376                                  * If we have data in queue, we don't want
3377                                  * to just free since the app may have done,
3378                                  * send()/close or connect/send/close. And
3379                                  * it wants the data to get across first.
3380                                  */
3381                                 /* Just abandon things in the front states */
3382                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3383                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3384                                         cnt_in_sd++;
3385                                 }
3386                                 continue;
3387                         }
3388                         /* Disconnect the socket please */
3389                         asoc->sctp_socket = NULL;
3390                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3391                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3392                             (asoc->asoc.control_pdapi) ||
3393                             (asoc->asoc.size_on_all_streams > 0) ||
3394                             (so && (so->so_rcv.sb_cc > 0))) {
3395                                 /* Left with Data unread */
3396                                 struct mbuf *op_err;
3397
3398                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3399                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3400                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3401                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3402                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3403                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3404                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3405                                 }
3406                                 if (sctp_free_assoc(inp, asoc,
3407                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3408                                         cnt_in_sd++;
3409                                 }
3410                                 continue;
3411                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3412                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3413                             (asoc->asoc.stream_queue_cnt == 0)) {
3414                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3415                                         goto abort_anyway;
3416                                 }
3417                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3418                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3419                                         struct sctp_nets *netp;
3420
3421                                         /*
3422                                          * there is nothing queued to send,
3423                                          * so I send shutdown
3424                                          */
3425                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3426                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3427                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3428                                         }
3429                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3430                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3431                                         sctp_stop_timers_for_shutdown(asoc);
3432                                         if (asoc->asoc.alternate) {
3433                                                 netp = asoc->asoc.alternate;
3434                                         } else {
3435                                                 netp = asoc->asoc.primary_destination;
3436                                         }
3437                                         sctp_send_shutdown(asoc, netp);
3438                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3439                                             netp);
3440                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3441                                             asoc->asoc.primary_destination);
3442                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3443                                 }
3444                         } else {
3445                                 /* mark into shutdown pending */
3446                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3447                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3448                                     asoc->asoc.primary_destination);
3449                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3450                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3451                                 }
3452                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3453                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3454                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3455                                         struct mbuf *op_err;
3456
3457                         abort_anyway:
3458                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3459                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3460                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3461                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3462                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3463                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3464                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3465                                         }
3466                                         if (sctp_free_assoc(inp, asoc,
3467                                             SCTP_PCBFREE_NOFORCE,
3468                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3469                                                 cnt_in_sd++;
3470                                         }
3471                                         continue;
3472                                 } else {
3473                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3474                                 }
3475                         }
3476                         cnt_in_sd++;
3477                         SCTP_TCB_UNLOCK(asoc);
3478                 }
3479                 /* now is there some left in our SHUTDOWN state? */
3480                 if (cnt_in_sd) {
3481 #ifdef SCTP_LOG_CLOSING
3482                         sctp_log_closing(inp, NULL, 2);
3483 #endif
3484                         inp->sctp_socket = NULL;
3485                         SCTP_INP_WUNLOCK(inp);
3486                         SCTP_ASOC_CREATE_UNLOCK(inp);
3487                         SCTP_INP_INFO_WUNLOCK();
3488                         return;
3489                 }
3490         }
3491         inp->sctp_socket = NULL;
3492         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3493             SCTP_PCB_FLAGS_UNBOUND) {
3494                 /*
3495                  * ok, this guy has been bound. It's port is somewhere in
3496                  * the SCTP_BASE_INFO(hash table). Remove it!
3497                  */
3498                 LIST_REMOVE(inp, sctp_hash);
3499                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3500         }
3501         /*
3502          * If there is a timer running to kill us, forget it, since it may
3503          * have a contest on the INP lock.. which would cause us to die ...
3504          */
3505         cnt = 0;
3506         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3507                 SCTP_TCB_LOCK(asoc);
3508                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3509                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3510                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3511                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3512                         }
3513                         cnt++;
3514                         SCTP_TCB_UNLOCK(asoc);
3515                         continue;
3516                 }
3517                 /* Free associations that are NOT killing us */
3518                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3519                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3520                         struct mbuf *op_err;
3521
3522                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3523                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3524                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3525                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3526                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3527                         cnt++;
3528                         SCTP_TCB_UNLOCK(asoc);
3529                         continue;
3530                 }
3531                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3532                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3533                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3534                 }
3535                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3536                     SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3537                         cnt++;
3538                 }
3539         }
3540         if (cnt) {
3541                 /* Ok we have someone out there that will kill us */
3542                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3543 #ifdef SCTP_LOG_CLOSING
3544                 sctp_log_closing(inp, NULL, 3);
3545 #endif
3546                 SCTP_INP_WUNLOCK(inp);
3547                 SCTP_ASOC_CREATE_UNLOCK(inp);
3548                 SCTP_INP_INFO_WUNLOCK();
3549                 return;
3550         }
3551         if (SCTP_INP_LOCK_CONTENDED(inp))
3552                 being_refed++;
3553         if (SCTP_INP_READ_CONTENDED(inp))
3554                 being_refed++;
3555         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3556                 being_refed++;
3557
3558         if ((inp->refcount) ||
3559             (being_refed) ||
3560             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3561                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3562 #ifdef SCTP_LOG_CLOSING
3563                 sctp_log_closing(inp, NULL, 4);
3564 #endif
3565                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3566                 SCTP_INP_WUNLOCK(inp);
3567                 SCTP_ASOC_CREATE_UNLOCK(inp);
3568                 SCTP_INP_INFO_WUNLOCK();
3569                 return;
3570         }
3571         inp->sctp_ep.signature_change.type = 0;
3572         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3573         /*
3574          * Remove it from the list .. last thing we need a lock for.
3575          */
3576         LIST_REMOVE(inp, sctp_list);
3577         SCTP_INP_WUNLOCK(inp);
3578         SCTP_ASOC_CREATE_UNLOCK(inp);
3579         SCTP_INP_INFO_WUNLOCK();
3580         /*
3581          * Now we release all locks. Since this INP cannot be found anymore
3582          * except possibly by the kill timer that might be running. We call
3583          * the drain function here. It should hit the case were it sees the
3584          * ACTIVE flag cleared and exit out freeing us to proceed and
3585          * destroy everything.
3586          */
3587         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3588                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3589         } else {
3590                 /* Probably un-needed */
3591                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3592         }
3593
3594 #ifdef SCTP_LOG_CLOSING
3595         sctp_log_closing(inp, NULL, 5);
3596 #endif
3597
3598
3599         if ((inp->sctp_asocidhash) != NULL) {
3600                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3601                 inp->sctp_asocidhash = NULL;
3602         }
3603         /* sa_ignore FREED_MEMORY */
3604         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3605                 /* Its only abandoned if it had data left */
3606                 if (sq->length)
3607                         SCTP_STAT_INCR(sctps_left_abandon);
3608
3609                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3610                 sctp_free_remote_addr(sq->whoFrom);
3611                 if (so)
3612                         so->so_rcv.sb_cc -= sq->length;
3613                 if (sq->data) {
3614                         sctp_m_freem(sq->data);
3615                         sq->data = NULL;
3616                 }
3617                 /*
3618                  * no need to free the net count, since at this point all
3619                  * assoc's are gone.
3620                  */
3621                 sctp_free_a_readq(NULL, sq);
3622         }
3623         /* Now the sctp_pcb things */
3624         /*
3625          * free each asoc if it is not already closed/free. we can't use the
3626          * macro here since le_next will get freed as part of the
3627          * sctp_free_assoc() call.
3628          */
3629         if (ip_pcb->inp_options) {
3630                 (void)sctp_m_free(ip_pcb->inp_options);
3631                 ip_pcb->inp_options = 0;
3632         }
3633 #ifdef INET6
3634         if (ip_pcb->inp_vflag & INP_IPV6) {
3635                 struct in6pcb *in6p;
3636
3637                 in6p = (struct in6pcb *)inp;
3638                 ip6_freepcbopts(in6p->in6p_outputopts);
3639         }
3640 #endif                          /* INET6 */
3641         ip_pcb->inp_vflag = 0;
3642         /* free up authentication fields */
3643         if (inp->sctp_ep.local_auth_chunks != NULL)
3644                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3645         if (inp->sctp_ep.local_hmacs != NULL)
3646                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3647
3648         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3649                 LIST_REMOVE(shared_key, next);
3650                 sctp_free_sharedkey(shared_key);
3651                 /* sa_ignore FREED_MEMORY */
3652         }
3653
3654         /*
3655          * if we have an address list the following will free the list of
3656          * ifaddr's that are set into this ep. Again macro limitations here,
3657          * since the LIST_FOREACH could be a bad idea.
3658          */
3659         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3660                 sctp_remove_laddr(laddr);
3661         }
3662
3663 #ifdef SCTP_TRACK_FREED_ASOCS
3664         /* TEMP CODE */
3665         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3666                 LIST_REMOVE(asoc, sctp_tcblist);
3667                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3668                 SCTP_DECR_ASOC_COUNT();
3669         }
3670         /* *** END TEMP CODE *** */
3671 #endif
3672         /* Now lets see about freeing the EP hash table. */
3673         if (inp->sctp_tcbhash != NULL) {
3674                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3675                 inp->sctp_tcbhash = NULL;
3676         }
3677         /* Now we must put the ep memory back into the zone pool */
3678         crfree(inp->ip_inp.inp.inp_cred);
3679         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3680         SCTP_INP_LOCK_DESTROY(inp);
3681         SCTP_INP_READ_DESTROY(inp);
3682         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3683         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3684         SCTP_DECR_EP_COUNT();
3685 }
3686
3687
3688 struct sctp_nets *
3689 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3690 {
3691         struct sctp_nets *net;
3692
3693         /* locate the address */
3694         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3695                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3696                         return (net);
3697         }
3698         return (NULL);
3699 }
3700
3701
3702 int
3703 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3704 {
3705         struct sctp_ifa *sctp_ifa;
3706
3707         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3708         if (sctp_ifa) {
3709                 return (1);
3710         } else {
3711                 return (0);
3712         }
3713 }
3714
3715 /*
3716  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3717  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3718  * stats of stuff.
3719  */
3720 int
3721 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3722     struct sctp_nets **netp, uint16_t port, int set_scope, int from)
3723 {
3724         /*
3725          * The following is redundant to the same lines in the
3726          * sctp_aloc_assoc() but is needed since others call the add address
3727          * function
3728          */
3729         struct sctp_nets *net, *netfirst;
3730         int addr_inscope;
3731
3732         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3733             from);
3734         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3735
3736         netfirst = sctp_findnet(stcb, newaddr);
3737         if (netfirst) {
3738                 /*
3739                  * Lie and return ok, we don't want to make the association
3740                  * go away for this behavior. It will happen in the TCP
3741                  * model in a connected socket. It does not reach the hash
3742                  * table until after the association is built so it can't be
3743                  * found. Mark as reachable, since the initial creation will
3744                  * have been cleared and the NOT_IN_ASSOC flag will have
3745                  * been added... and we don't want to end up removing it
3746                  * back out.
3747                  */
3748                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3749                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3750                             SCTP_ADDR_UNCONFIRMED);
3751                 } else {
3752                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3753                 }
3754
3755                 return (0);
3756         }
3757         addr_inscope = 1;
3758         switch (newaddr->sa_family) {
3759 #ifdef INET
3760         case AF_INET:
3761                 {
3762                         struct sockaddr_in *sin;
3763
3764                         sin = (struct sockaddr_in *)newaddr;
3765                         if (sin->sin_addr.s_addr == 0) {
3766                                 /* Invalid address */
3767                                 return (-1);
3768                         }
3769                         /* zero out the bzero area */
3770                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3771
3772                         /* assure len is set */
3773                         sin->sin_len = sizeof(struct sockaddr_in);
3774                         if (set_scope) {
3775                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3776                                         stcb->asoc.scope.ipv4_local_scope = 1;
3777                                 }
3778                         } else {
3779                                 /* Validate the address is in scope */
3780                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3781                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3782                                         addr_inscope = 0;
3783                                 }
3784                         }
3785                         break;
3786                 }
3787 #endif
3788 #ifdef INET6
3789         case AF_INET6:
3790                 {
3791                         struct sockaddr_in6 *sin6;
3792
3793                         sin6 = (struct sockaddr_in6 *)newaddr;
3794                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3795                                 /* Invalid address */
3796                                 return (-1);
3797                         }
3798                         /* assure len is set */
3799                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3800                         if (set_scope) {
3801                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3802                                         stcb->asoc.scope.loopback_scope = 1;
3803                                         stcb->asoc.scope.local_scope = 0;
3804                                         stcb->asoc.scope.ipv4_local_scope = 1;
3805                                         stcb->asoc.scope.site_scope = 1;
3806                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3807                                         /*
3808                                          * If the new destination is a
3809                                          * LINK_LOCAL we must have common
3810                                          * site scope. Don't set the local
3811                                          * scope since we may not share all
3812                                          * links, only loopback can do this.
3813                                          * Links on the local network would
3814                                          * also be on our private network
3815                                          * for v4 too.
3816                                          */
3817                                         stcb->asoc.scope.ipv4_local_scope = 1;
3818                                         stcb->asoc.scope.site_scope = 1;
3819                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3820                                         /*
3821                                          * If the new destination is
3822                                          * SITE_LOCAL then we must have site
3823                                          * scope in common.
3824                                          */
3825                                         stcb->asoc.scope.site_scope = 1;
3826                                 }
3827                         } else {
3828                                 /* Validate the address is in scope */
3829                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3830                                     (stcb->asoc.scope.loopback_scope == 0)) {
3831                                         addr_inscope = 0;
3832                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3833                                     (stcb->asoc.scope.local_scope == 0)) {
3834                                         addr_inscope = 0;
3835                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3836                                     (stcb->asoc.scope.site_scope == 0)) {
3837                                         addr_inscope = 0;
3838                                 }
3839                         }
3840                         break;
3841                 }
3842 #endif
3843         default:
3844                 /* not supported family type */
3845                 return (-1);
3846         }
3847         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3848         if (net == NULL) {
3849                 return (-1);
3850         }
3851         SCTP_INCR_RADDR_COUNT();
3852         bzero(net, sizeof(struct sctp_nets));
3853         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3854         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3855         switch (newaddr->sa_family) {
3856 #ifdef INET
3857         case AF_INET:
3858                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3859                 break;
3860 #endif
3861 #ifdef INET6
3862         case AF_INET6:
3863                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3864                 break;
3865 #endif
3866         default:
3867                 break;
3868         }
3869         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3870         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3871                 stcb->asoc.scope.loopback_scope = 1;
3872                 stcb->asoc.scope.ipv4_local_scope = 1;
3873                 stcb->asoc.scope.local_scope = 0;
3874                 stcb->asoc.scope.site_scope = 1;
3875                 addr_inscope = 1;
3876         }
3877         net->failure_threshold = stcb->asoc.def_net_failure;
3878         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3879         if (addr_inscope == 0) {
3880                 net->dest_state = (SCTP_ADDR_REACHABLE |
3881                     SCTP_ADDR_OUT_OF_SCOPE);
3882         } else {
3883                 if (from == SCTP_ADDR_IS_CONFIRMED)
3884                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3885                         net->dest_state = SCTP_ADDR_REACHABLE;
3886                 else
3887                         net->dest_state = SCTP_ADDR_REACHABLE |
3888                             SCTP_ADDR_UNCONFIRMED;
3889         }
3890         /*
3891          * We set this to 0, the timer code knows that this means its an
3892          * initial value
3893          */
3894         net->rto_needed = 1;
3895         net->RTO = 0;
3896         net->RTO_measured = 0;
3897         stcb->asoc.numnets++;
3898         net->ref_count = 1;
3899         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3900         net->port = port;
3901         net->dscp = stcb->asoc.default_dscp;
3902 #ifdef INET6
3903         net->flowlabel = stcb->asoc.default_flowlabel;
3904 #endif
3905         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3906                 net->dest_state |= SCTP_ADDR_NOHB;
3907         } else {
3908                 net->dest_state &= ~SCTP_ADDR_NOHB;
3909         }
3910         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3911                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3912         } else {
3913                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3914         }
3915         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3916         /* Init the timer structure */
3917         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3918         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3919         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3920
3921         /* Now generate a route for this guy */
3922 #ifdef INET6
3923         /* KAME hack: embed scopeid */
3924         if (newaddr->sa_family == AF_INET6) {
3925                 struct sockaddr_in6 *sin6;
3926
3927                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3928                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3929                 sin6->sin6_scope_id = 0;
3930         }
3931 #endif
3932         SCTP_RTALLOC((sctp_route_t *)&net->ro,
3933             stcb->asoc.vrf_id,
3934             stcb->sctp_ep->fibnum);
3935
3936         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3937                 /* Get source address */
3938                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3939                     stcb,
3940                     (sctp_route_t *)&net->ro,
3941                     net,
3942                     0,
3943                     stcb->asoc.vrf_id);
3944                 if (net->ro._s_addr != NULL) {
3945                         net->src_addr_selected = 1;
3946                         /* Now get the interface MTU */
3947                         if (net->ro._s_addr->ifn_p != NULL) {
3948                                 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3949                         }
3950                 } else {
3951                         net->src_addr_selected = 0;
3952                 }
3953                 if (net->mtu > 0) {
3954                         uint32_t rmtu;
3955
3956                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3957                         if (rmtu == 0) {
3958                                 /*
3959                                  * Start things off to match mtu of
3960                                  * interface please.
3961                                  */
3962                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3963                                     net->ro.ro_rt, net->mtu);
3964                         } else {
3965                                 /*
3966                                  * we take the route mtu over the interface,
3967                                  * since the route may be leading out the
3968                                  * loopback, or a different interface.
3969                                  */
3970                                 net->mtu = rmtu;
3971                         }
3972                 }
3973         } else {
3974                 net->src_addr_selected = 0;
3975         }
3976         if (net->mtu == 0) {
3977                 switch (newaddr->sa_family) {
3978 #ifdef INET
3979                 case AF_INET:
3980                         net->mtu = SCTP_DEFAULT_MTU;
3981                         break;
3982 #endif
3983 #ifdef INET6
3984                 case AF_INET6:
3985                         net->mtu = 1280;
3986                         break;
3987 #endif
3988                 default:
3989                         break;
3990                 }
3991         }
3992 #if defined(INET) || defined(INET6)
3993         if (net->port) {
3994                 net->mtu -= (uint32_t)sizeof(struct udphdr);
3995         }
3996 #endif
3997         if (from == SCTP_ALLOC_ASOC) {
3998                 stcb->asoc.smallest_mtu = net->mtu;
3999         }
4000         if (stcb->asoc.smallest_mtu > net->mtu) {
4001                 sctp_pathmtu_adjustment(stcb, net->mtu);
4002         }
4003 #ifdef INET6
4004         if (newaddr->sa_family == AF_INET6) {
4005                 struct sockaddr_in6 *sin6;
4006
4007                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4008                 (void)sa6_recoverscope(sin6);
4009         }
4010 #endif
4011
4012         /* JRS - Use the congestion control given in the CC module */
4013         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4014                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4015
4016         /*
4017          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4018          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4019          */
4020         net->find_pseudo_cumack = 1;
4021         net->find_rtx_pseudo_cumack = 1;
4022         /* Choose an initial flowid. */
4023         net->flowid = stcb->asoc.my_vtag ^
4024             ntohs(stcb->rport) ^
4025             ntohs(stcb->sctp_ep->sctp_lport);
4026         net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4027         if (netp) {
4028                 *netp = net;
4029         }
4030         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4031         if (net->ro.ro_rt == NULL) {
4032                 /* Since we have no route put it at the back */
4033                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4034         } else if (netfirst == NULL) {
4035                 /* We are the first one in the pool. */
4036                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4037         } else if (netfirst->ro.ro_rt == NULL) {
4038                 /*
4039                  * First one has NO route. Place this one ahead of the first
4040                  * one.
4041                  */
4042                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4043         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4044                 /*
4045                  * This one has a different interface than the one at the
4046                  * top of the list. Place it ahead.
4047                  */
4048                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4049         } else {
4050                 /*
4051                  * Ok we have the same interface as the first one. Move
4052                  * forward until we find either a) one with a NULL route...
4053                  * insert ahead of that b) one with a different ifp.. insert
4054                  * after that. c) end of the list.. insert at the tail.
4055                  */
4056                 struct sctp_nets *netlook;
4057
4058                 do {
4059                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4060                         if (netlook == NULL) {
4061                                 /* End of the list */
4062                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4063                                 break;
4064                         } else if (netlook->ro.ro_rt == NULL) {
4065                                 /* next one has NO route */
4066                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4067                                 break;
4068                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4069                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4070                                     net, sctp_next);
4071                                 break;
4072                         }
4073                         /* Shift forward */
4074                         netfirst = netlook;
4075                 } while (netlook != NULL);
4076         }
4077
4078         /* got to have a primary set */
4079         if (stcb->asoc.primary_destination == 0) {
4080                 stcb->asoc.primary_destination = net;
4081         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4082                     (net->ro.ro_rt) &&
4083             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4084                 /* No route to current primary adopt new primary */
4085                 stcb->asoc.primary_destination = net;
4086         }
4087         /* Validate primary is first */
4088         net = TAILQ_FIRST(&stcb->asoc.nets);
4089         if ((net != stcb->asoc.primary_destination) &&
4090             (stcb->asoc.primary_destination)) {
4091                 /*
4092                  * first one on the list is NOT the primary sctp_cmpaddr()
4093                  * is much more efficient if the primary is the first on the
4094                  * list, make it so.
4095                  */
4096                 TAILQ_REMOVE(&stcb->asoc.nets,
4097                     stcb->asoc.primary_destination, sctp_next);
4098                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4099                     stcb->asoc.primary_destination, sctp_next);
4100         }
4101         return (0);
4102 }
4103
4104
4105 static uint32_t
4106 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4107 {
4108         uint32_t id;
4109         struct sctpasochead *head;
4110         struct sctp_tcb *lstcb;
4111
4112         SCTP_INP_WLOCK(inp);
4113 try_again:
4114         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4115                 /* TSNH */
4116                 SCTP_INP_WUNLOCK(inp);
4117                 return (0);
4118         }
4119         /*
4120          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4121          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4122          */
4123         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4124                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4125         }
4126         id = inp->sctp_associd_counter;
4127         inp->sctp_associd_counter++;
4128         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4129         if (lstcb) {
4130                 goto try_again;
4131         }
4132         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4133         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4134         stcb->asoc.in_asocid_hash = 1;
4135         SCTP_INP_WUNLOCK(inp);
4136         return id;
4137 }
4138
4139 /*
4140  * allocate an association and add it to the endpoint. The caller must be
4141  * careful to add all additional addresses once they are know right away or
4142  * else the assoc will be may experience a blackout scenario.
4143  */
4144 struct sctp_tcb *
4145 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4146     int *error, uint32_t override_tag, uint32_t vrf_id,
4147     uint16_t o_streams, uint16_t port,
4148     struct thread *p
4149 )
4150 {
4151         /* note the p argument is only valid in unbound sockets */
4152
4153         struct sctp_tcb *stcb;
4154         struct sctp_association *asoc;
4155         struct sctpasochead *head;
4156         uint16_t rport;
4157         int err;
4158
4159         /*
4160          * Assumption made here: Caller has done a
4161          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4162          * address does not exist already.
4163          */
4164         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4165                 /* Hit max assoc, sorry no more */
4166                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4167                 *error = ENOBUFS;
4168                 return (NULL);
4169         }
4170         if (firstaddr == NULL) {
4171                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4172                 *error = EINVAL;
4173                 return (NULL);
4174         }
4175         SCTP_INP_RLOCK(inp);
4176         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4177             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4178             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4179                 /*
4180                  * If its in the TCP pool, its NOT allowed to create an
4181                  * association. The parent listener needs to call
4182                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4183                  * off, or connected one does this.. its an error.
4184                  */
4185                 SCTP_INP_RUNLOCK(inp);
4186                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4187                 *error = EINVAL;
4188                 return (NULL);
4189         }
4190         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4191             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4192                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4193                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4194                         SCTP_INP_RUNLOCK(inp);
4195                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4196                         *error = EINVAL;
4197                         return (NULL);
4198                 }
4199         }
4200         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4201 #ifdef SCTP_DEBUG
4202         if (firstaddr) {
4203                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4204                 switch (firstaddr->sa_family) {
4205 #ifdef INET
4206                 case AF_INET:
4207                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4208                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4209                         break;
4210 #endif
4211 #ifdef INET6
4212                 case AF_INET6:
4213                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4214                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4215                         break;
4216 #endif
4217                 default:
4218                         break;
4219                 }
4220         } else {
4221                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4222         }
4223 #endif                          /* SCTP_DEBUG */
4224         switch (firstaddr->sa_family) {
4225 #ifdef INET
4226         case AF_INET:
4227                 {
4228                         struct sockaddr_in *sin;
4229
4230                         sin = (struct sockaddr_in *)firstaddr;
4231                         if ((ntohs(sin->sin_port) == 0) ||
4232                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4233                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4234                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4235                                 /* Invalid address */
4236                                 SCTP_INP_RUNLOCK(inp);
4237                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4238                                 *error = EINVAL;
4239                                 return (NULL);
4240                         }
4241                         rport = sin->sin_port;
4242                         break;
4243                 }
4244 #endif
4245 #ifdef INET6
4246         case AF_INET6:
4247                 {
4248                         struct sockaddr_in6 *sin6;
4249
4250                         sin6 = (struct sockaddr_in6 *)firstaddr;
4251                         if ((ntohs(sin6->sin6_port) == 0) ||
4252                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4253                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4254                                 /* Invalid address */
4255                                 SCTP_INP_RUNLOCK(inp);
4256                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4257                                 *error = EINVAL;
4258                                 return (NULL);
4259                         }
4260                         rport = sin6->sin6_port;
4261                         break;
4262                 }
4263 #endif
4264         default:
4265                 /* not supported family type */
4266                 SCTP_INP_RUNLOCK(inp);
4267                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4268                 *error = EINVAL;
4269                 return (NULL);
4270         }
4271         SCTP_INP_RUNLOCK(inp);
4272         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4273                 /*
4274                  * If you have not performed a bind, then we need to do the
4275                  * ephemeral bind for you.
4276                  */
4277                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4278                     (struct sockaddr *)NULL,
4279                     (struct sctp_ifa *)NULL,
4280                     p
4281                     ))) {
4282                         /* bind error, probably perm */
4283                         *error = err;
4284                         return (NULL);
4285                 }
4286         }
4287         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4288         if (stcb == NULL) {
4289                 /* out of memory? */
4290                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4291                 *error = ENOMEM;
4292                 return (NULL);
4293         }
4294         SCTP_INCR_ASOC_COUNT();
4295
4296         bzero(stcb, sizeof(*stcb));
4297         asoc = &stcb->asoc;
4298
4299         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4300         SCTP_TCB_LOCK_INIT(stcb);
4301         SCTP_TCB_SEND_LOCK_INIT(stcb);
4302         stcb->rport = rport;
4303         /* setup back pointer's */
4304         stcb->sctp_ep = inp;
4305         stcb->sctp_socket = inp->sctp_socket;
4306         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
4307                 /* failed */
4308                 SCTP_TCB_LOCK_DESTROY(stcb);
4309                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4310                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4311                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4312                 SCTP_DECR_ASOC_COUNT();
4313                 *error = err;
4314                 return (NULL);
4315         }
4316         /* and the port */
4317         SCTP_INP_INFO_WLOCK();
4318         SCTP_INP_WLOCK(inp);
4319         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4320                 /* inpcb freed while alloc going on */
4321                 SCTP_TCB_LOCK_DESTROY(stcb);
4322                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4323                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4324                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4325                 SCTP_INP_WUNLOCK(inp);
4326                 SCTP_INP_INFO_WUNLOCK();
4327                 SCTP_DECR_ASOC_COUNT();
4328                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4329                 *error = EINVAL;
4330                 return (NULL);
4331         }
4332         SCTP_TCB_LOCK(stcb);
4333
4334         /* now that my_vtag is set, add it to the hash */
4335         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4336         /* put it in the bucket in the vtag hash of assoc's for the system */
4337         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4338         SCTP_INP_INFO_WUNLOCK();
4339
4340         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4341                 /* failure.. memory error? */
4342                 if (asoc->strmout) {
4343                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4344                         asoc->strmout = NULL;
4345                 }
4346                 if (asoc->mapping_array) {
4347                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4348                         asoc->mapping_array = NULL;
4349                 }
4350                 if (asoc->nr_mapping_array) {
4351                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4352                         asoc->nr_mapping_array = NULL;
4353                 }
4354                 SCTP_DECR_ASOC_COUNT();
4355                 SCTP_TCB_UNLOCK(stcb);
4356                 SCTP_TCB_LOCK_DESTROY(stcb);
4357                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4358                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4359                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4360                 SCTP_INP_WUNLOCK(inp);
4361                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4362                 *error = ENOBUFS;
4363                 return (NULL);
4364         }
4365         /* Init all the timers */
4366         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4367         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4368         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4369         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4370         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4371         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4372         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4373
4374         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4375         /* now file the port under the hash as well */
4376         if (inp->sctp_tcbhash != NULL) {
4377                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4378                     inp->sctp_hashmark)];
4379                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4380         }
4381         SCTP_INP_WUNLOCK(inp);
4382         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4383         return (stcb);
4384 }
4385
4386
4387 void
4388 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4389 {
4390         struct sctp_association *asoc;
4391
4392         asoc = &stcb->asoc;
4393         asoc->numnets--;
4394         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4395         if (net == asoc->primary_destination) {
4396                 /* Reset primary */
4397                 struct sctp_nets *lnet;
4398
4399                 lnet = TAILQ_FIRST(&asoc->nets);
4400                 /*
4401                  * Mobility adaptation Ideally, if deleted destination is
4402                  * the primary, it becomes a fast retransmission trigger by
4403                  * the subsequent SET PRIMARY. (by micchie)
4404                  */
4405                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4406                     SCTP_MOBILITY_BASE) ||
4407                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4408                     SCTP_MOBILITY_FASTHANDOFF)) {
4409                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4410                         if (asoc->deleted_primary != NULL) {
4411                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4412                                 goto out;
4413                         }
4414                         asoc->deleted_primary = net;
4415                         atomic_add_int(&net->ref_count, 1);
4416                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4417                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4418                         sctp_mobility_feature_on(stcb->sctp_ep,
4419                             SCTP_MOBILITY_PRIM_DELETED);
4420                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4421                             stcb->sctp_ep, stcb, NULL);
4422                 }
4423 out:
4424                 /* Try to find a confirmed primary */
4425                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4426         }
4427         if (net == asoc->last_data_chunk_from) {
4428                 /* Reset primary */
4429                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4430         }
4431         if (net == asoc->last_control_chunk_from) {
4432                 /* Clear net */
4433                 asoc->last_control_chunk_from = NULL;
4434         }
4435         if (net == stcb->asoc.alternate) {
4436                 sctp_free_remote_addr(stcb->asoc.alternate);
4437                 stcb->asoc.alternate = NULL;
4438         }
4439         sctp_free_remote_addr(net);
4440 }
4441
4442 /*
4443  * remove a remote endpoint address from an association, it will fail if the
4444  * address does not exist.
4445  */
4446 int
4447 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4448 {
4449         /*
4450          * Here we need to remove a remote address. This is quite simple, we
4451          * first find it in the list of address for the association
4452          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4453          * on that item. Note we do not allow it to be removed if there are
4454          * no other addresses.
4455          */
4456         struct sctp_association *asoc;
4457         struct sctp_nets *net, *nnet;
4458
4459         asoc = &stcb->asoc;
4460
4461         /* locate the address */
4462         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4463                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4464                         continue;
4465                 }
4466                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4467                     remaddr)) {
4468                         /* we found the guy */
4469                         if (asoc->numnets < 2) {
4470                                 /* Must have at LEAST two remote addresses */
4471                                 return (-1);
4472                         } else {
4473                                 sctp_remove_net(stcb, net);
4474                                 return (0);
4475                         }
4476                 }
4477         }
4478         /* not found. */
4479         return (-2);
4480 }
4481
4482 void
4483 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4484 {
4485         struct sctpvtaghead *chain;
4486         struct sctp_tagblock *twait_block;
4487         int found = 0;
4488         int i;
4489
4490         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4491         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4492                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4493                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4494                             (twait_block->vtag_block[i].lport == lport) &&
4495                             (twait_block->vtag_block[i].rport == rport)) {
4496                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4497                                 twait_block->vtag_block[i].v_tag = 0;
4498                                 twait_block->vtag_block[i].lport = 0;
4499                                 twait_block->vtag_block[i].rport = 0;
4500                                 found = 1;
4501                                 break;
4502                         }
4503                 }
4504                 if (found)
4505                         break;
4506         }
4507 }
4508
4509 int
4510 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4511 {
4512         struct sctpvtaghead *chain;
4513         struct sctp_tagblock *twait_block;
4514         int found = 0;
4515         int i;
4516
4517         SCTP_INP_INFO_WLOCK();
4518         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4519         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4520                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4521                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4522                             (twait_block->vtag_block[i].lport == lport) &&
4523                             (twait_block->vtag_block[i].rport == rport)) {
4524                                 found = 1;
4525                                 break;
4526                         }
4527                 }
4528                 if (found)
4529                         break;
4530         }
4531         SCTP_INP_INFO_WUNLOCK();
4532         return (found);
4533 }
4534
4535
4536 void
4537 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4538 {
4539         struct sctpvtaghead *chain;
4540         struct sctp_tagblock *twait_block;
4541         struct timeval now;
4542         int set, i;
4543
4544         if (time == 0) {
4545                 /* Its disabled */
4546                 return;
4547         }
4548         (void)SCTP_GETTIME_TIMEVAL(&now);
4549         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4550         set = 0;
4551         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4552                 /* Block(s) present, lets find space, and expire on the fly */
4553                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4554                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4555                             !set) {
4556                                 twait_block->vtag_block[i].tv_sec_at_expire =
4557                                     now.tv_sec + time;
4558                                 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                                 set = 1;
4562                         } else if ((twait_block->vtag_block[i].v_tag) &&
4563                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4564                                 /* Audit expires this guy */
4565                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4566                                 twait_block->vtag_block[i].v_tag = 0;
4567                                 twait_block->vtag_block[i].lport = 0;
4568                                 twait_block->vtag_block[i].rport = 0;
4569                                 if (set == 0) {
4570                                         /* Reuse it for my new tag */
4571                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4572                                         twait_block->vtag_block[i].v_tag = tag;
4573                                         twait_block->vtag_block[i].lport = lport;
4574                                         twait_block->vtag_block[i].rport = rport;
4575                                         set = 1;
4576                                 }
4577                         }
4578                 }
4579                 if (set) {
4580                         /*
4581                          * We only do up to the block where we can place our
4582                          * tag for audits
4583                          */
4584                         break;
4585                 }
4586         }
4587         /* Need to add a new block to chain */
4588         if (!set) {
4589                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4590                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4591                 if (twait_block == NULL) {
4592 #ifdef INVARIANTS
4593                         panic("Can not alloc tagblock");
4594 #endif
4595                         return;
4596                 }
4597                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4598                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4599                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4600                 twait_block->vtag_block[0].v_tag = tag;
4601                 twait_block->vtag_block[0].lport = lport;
4602                 twait_block->vtag_block[0].rport = rport;
4603         }
4604 }
4605
4606 void
4607 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4608 {
4609         struct sctp_tmit_chunk *chk, *nchk;
4610         struct sctp_queued_to_read *ctl, *nctl;
4611
4612         TAILQ_FOREACH_SAFE(ctl, rh, next_instrm, nctl) {
4613                 TAILQ_REMOVE(rh, ctl, next_instrm);
4614                 ctl->on_strm_q = 0;
4615                 if (ctl->on_read_q == 0) {
4616                         sctp_free_remote_addr(ctl->whoFrom);
4617                         if (ctl->data) {
4618                                 sctp_m_freem(ctl->data);
4619                                 ctl->data = NULL;
4620                         }
4621                 }
4622                 /* Reassembly free? */
4623                 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) {
4624                         TAILQ_REMOVE(&ctl->reasm, chk, sctp_next);
4625                         if (chk->data) {
4626                                 sctp_m_freem(chk->data);
4627                                 chk->data = NULL;
4628                         }
4629                         if (chk->holds_key_ref)
4630                                 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4631                         sctp_free_remote_addr(chk->whoTo);
4632                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4633                         SCTP_DECR_CHK_COUNT();
4634                         /* sa_ignore FREED_MEMORY */
4635                 }
4636                 /*
4637                  * We don't free the address here since all the net's were
4638                  * freed above.
4639                  */
4640                 if (ctl->on_read_q == 0) {
4641                         sctp_free_a_readq(stcb, ctl);
4642                 }
4643         }
4644 }
4645
4646
4647 /*-
4648  * Free the association after un-hashing the remote port. This
4649  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4650  * expect that the input to this function IS a locked TCB.
4651  * It will return 0, if it did NOT destroy the association (instead
4652  * it unlocks it. It will return NON-zero if it either destroyed the
4653  * association OR the association is already destroyed.
4654  */
4655 int
4656 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4657 {
4658         int i;
4659         struct sctp_association *asoc;
4660         struct sctp_nets *net, *nnet;
4661         struct sctp_laddr *laddr, *naddr;
4662         struct sctp_tmit_chunk *chk, *nchk;
4663         struct sctp_asconf_addr *aparam, *naparam;
4664         struct sctp_asconf_ack *aack, *naack;
4665         struct sctp_stream_reset_list *strrst, *nstrrst;
4666         struct sctp_queued_to_read *sq, *nsq;
4667         struct sctp_stream_queue_pending *sp, *nsp;
4668         sctp_sharedkey_t *shared_key, *nshared_key;
4669         struct socket *so;
4670
4671         /* first, lets purge the entry from the hash table. */
4672
4673 #ifdef SCTP_LOG_CLOSING
4674         sctp_log_closing(inp, stcb, 6);
4675 #endif
4676         if (stcb->asoc.state == 0) {
4677 #ifdef SCTP_LOG_CLOSING
4678                 sctp_log_closing(inp, NULL, 7);
4679 #endif
4680                 /* there is no asoc, really TSNH :-0 */
4681                 return (1);
4682         }
4683         if (stcb->asoc.alternate) {
4684                 sctp_free_remote_addr(stcb->asoc.alternate);
4685                 stcb->asoc.alternate = NULL;
4686         }
4687         /* TEMP CODE */
4688         if (stcb->freed_from_where == 0) {
4689                 /* Only record the first place free happened from */
4690                 stcb->freed_from_where = from_location;
4691         }
4692         /* TEMP CODE */
4693
4694         asoc = &stcb->asoc;
4695         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4696             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4697                 /* nothing around */
4698                 so = NULL;
4699         else
4700                 so = inp->sctp_socket;
4701
4702         /*
4703          * We used timer based freeing if a reader or writer is in the way.
4704          * So we first check if we are actually being called from a timer,
4705          * if so we abort early if a reader or writer is still in the way.
4706          */
4707         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4708             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4709                 /*
4710                  * is it the timer driving us? if so are the reader/writers
4711                  * gone?
4712                  */
4713                 if (stcb->asoc.refcnt) {
4714                         /* nope, reader or writer in the way */
4715                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4716                         /* no asoc destroyed */
4717                         SCTP_TCB_UNLOCK(stcb);
4718 #ifdef SCTP_LOG_CLOSING
4719                         sctp_log_closing(inp, stcb, 8);
4720 #endif
4721                         return (0);
4722                 }
4723         }
4724         /* now clean up any other timers */
4725         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4726         asoc->dack_timer.self = NULL;
4727         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4728         /*-
4729          * For stream reset we don't blast this unless
4730          * it is a str-reset timer, it might be the
4731          * free-asoc timer which we DON'T want to
4732          * disturb.
4733          */
4734         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4735                 asoc->strreset_timer.self = NULL;
4736         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4737         asoc->asconf_timer.self = NULL;
4738         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4739         asoc->autoclose_timer.self = NULL;
4740         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4741         asoc->shut_guard_timer.self = NULL;
4742         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4743         asoc->delayed_event_timer.self = NULL;
4744         /* Mobility adaptation */
4745         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4746         asoc->delete_prim_timer.self = NULL;
4747         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4748                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4749                 net->rxt_timer.self = NULL;
4750                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4751                 net->pmtu_timer.self = NULL;
4752                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4753                 net->hb_timer.self = NULL;
4754         }
4755         /* Now the read queue needs to be cleaned up (only once) */
4756         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4757                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4758                 SCTP_INP_READ_LOCK(inp);
4759                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4760                         if (sq->stcb == stcb) {
4761                                 sq->do_not_ref_stcb = 1;
4762                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4763                                 /*
4764                                  * If there is no end, there never will be
4765                                  * now.
4766                                  */
4767                                 if (sq->end_added == 0) {
4768                                         /* Held for PD-API clear that. */
4769                                         sq->pdapi_aborted = 1;
4770                                         sq->held_length = 0;
4771                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4772                                                 /*
4773                                                  * Need to add a PD-API
4774                                                  * aborted indication.
4775                                                  * Setting the control_pdapi
4776                                                  * assures that it will be
4777                                                  * added right after this
4778                                                  * msg.
4779                                                  */
4780                                                 uint32_t strseq;
4781
4782                                                 stcb->asoc.control_pdapi = sq;
4783                                                 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff);
4784                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4785                                                     stcb,
4786                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4787                                                     (void *)&strseq,
4788                                                     SCTP_SO_LOCKED);
4789                                                 stcb->asoc.control_pdapi = NULL;
4790                                         }
4791                                 }
4792                                 /* Add an end to wake them */
4793                                 sq->end_added = 1;
4794                         }
4795                 }
4796                 SCTP_INP_READ_UNLOCK(inp);
4797                 if (stcb->block_entry) {
4798                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4799                         stcb->block_entry->error = ECONNRESET;
4800                         stcb->block_entry = NULL;
4801                 }
4802         }
4803         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4804                 /*
4805                  * Someone holds a reference OR the socket is unaccepted
4806                  * yet.
4807                  */
4808                 if ((stcb->asoc.refcnt) ||
4809                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4810                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4811                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4812                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4813                 }
4814                 SCTP_TCB_UNLOCK(stcb);
4815                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4816                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4817                         /* nothing around */
4818                         so = NULL;
4819                 if (so) {
4820                         /* Wake any reader/writers */
4821                         sctp_sorwakeup(inp, so);
4822                         sctp_sowwakeup(inp, so);
4823                 }
4824 #ifdef SCTP_LOG_CLOSING
4825                 sctp_log_closing(inp, stcb, 9);
4826 #endif
4827                 /* no asoc destroyed */
4828                 return (0);
4829         }
4830 #ifdef SCTP_LOG_CLOSING
4831         sctp_log_closing(inp, stcb, 10);
4832 #endif
4833         /*
4834          * When I reach here, no others want to kill the assoc yet.. and I
4835          * own the lock. Now its possible an abort comes in when I do the
4836          * lock exchange below to grab all the locks to do the final take
4837          * out. to prevent this we increment the count, which will start a
4838          * timer and blow out above thus assuring us that we hold exclusive
4839          * killing of the asoc. Note that after getting back the TCB lock we
4840          * will go ahead and increment the counter back up and stop any
4841          * timer a passing stranger may have started :-S
4842          */
4843         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4844                 atomic_add_int(&stcb->asoc.refcnt, 1);
4845
4846                 SCTP_TCB_UNLOCK(stcb);
4847                 SCTP_INP_INFO_WLOCK();
4848                 SCTP_INP_WLOCK(inp);
4849                 SCTP_TCB_LOCK(stcb);
4850         }
4851         /* Double check the GONE flag */
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
4857         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4858             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4859                 /*
4860                  * For TCP type we need special handling when we are
4861                  * connected. We also include the peel'ed off ones to.
4862                  */
4863                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4864                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4865                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4866                         if (so) {
4867                                 SOCK_LOCK(so);
4868                                 if (so->so_rcv.sb_cc == 0) {
4869                                         so->so_state &= ~(SS_ISCONNECTING |
4870                                             SS_ISDISCONNECTING |
4871                                             SS_ISCONFIRMING |
4872                                             SS_ISCONNECTED);
4873                                 }
4874                                 socantrcvmore_locked(so);
4875                                 socantsendmore(so);
4876                                 sctp_sowwakeup(inp, so);
4877                                 sctp_sorwakeup(inp, so);
4878                                 SCTP_SOWAKEUP(so);
4879                         }
4880                 }
4881         }
4882         /*
4883          * Make it invalid too, that way if its about to run it will abort
4884          * and return.
4885          */
4886         /* re-increment the lock */
4887         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4888                 atomic_add_int(&stcb->asoc.refcnt, -1);
4889         }
4890         if (stcb->asoc.refcnt) {
4891                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4892                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4893                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4894                         SCTP_INP_INFO_WUNLOCK();
4895                         SCTP_INP_WUNLOCK(inp);
4896                 }
4897                 SCTP_TCB_UNLOCK(stcb);
4898                 return (0);
4899         }
4900         asoc->state = 0;
4901         if (inp->sctp_tcbhash) {
4902                 LIST_REMOVE(stcb, sctp_tcbhash);
4903         }
4904         if (stcb->asoc.in_asocid_hash) {
4905                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4906         }
4907         /* Now lets remove it from the list of ALL associations in the EP */
4908         LIST_REMOVE(stcb, sctp_tcblist);
4909         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4910                 SCTP_INP_INCR_REF(inp);
4911                 SCTP_INP_WUNLOCK(inp);
4912         }
4913         /* pull from vtag hash */
4914         LIST_REMOVE(stcb, sctp_asocs);
4915         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4916             inp->sctp_lport, stcb->rport);
4917
4918         /*
4919          * Now restop the timers to be sure this is paranoia at is finest!
4920          */
4921         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4922         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4923         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4924         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4925         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4926         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4927         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4928         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4929                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4930                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4931                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4932         }
4933
4934         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4935         /*
4936          * The chunk lists and such SHOULD be empty but we check them just
4937          * in case.
4938          */
4939         /* anything on the wheel needs to be removed */
4940         for (i = 0; i < asoc->streamoutcnt; i++) {
4941                 struct sctp_stream_out *outs;
4942
4943                 outs = &asoc->strmout[i];
4944                 /* now clean up any chunks here */
4945                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4946                         atomic_subtract_int(&asoc->stream_queue_cnt, 1);
4947                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4948                         stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 0);
4949                         sctp_free_spbufspace(stcb, asoc, sp);
4950                         if (sp->data) {
4951                                 if (so) {
4952                                         /* Still an open socket - report */
4953                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4954                                             0, (void *)sp, SCTP_SO_LOCKED);
4955                                 }
4956                                 if (sp->data) {
4957                                         sctp_m_freem(sp->data);
4958                                         sp->data = NULL;
4959                                         sp->tail_mbuf = NULL;
4960                                         sp->length = 0;
4961                                 }
4962                         }
4963                         if (sp->net) {
4964                                 sctp_free_remote_addr(sp->net);
4965                                 sp->net = NULL;
4966                         }
4967                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4968                 }
4969         }
4970         /* sa_ignore FREED_MEMORY */
4971         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4972                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4973                 SCTP_FREE(strrst, SCTP_M_STRESET);
4974         }
4975         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4976                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4977                 if (sq->data) {
4978                         sctp_m_freem(sq->data);
4979                         sq->data = NULL;
4980                 }
4981                 sctp_free_remote_addr(sq->whoFrom);
4982                 sq->whoFrom = NULL;
4983                 sq->stcb = NULL;
4984                 /* Free the ctl entry */
4985                 sctp_free_a_readq(stcb, sq);
4986                 /* sa_ignore FREED_MEMORY */
4987         }
4988         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4989                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4990                 if (chk->data) {
4991                         sctp_m_freem(chk->data);
4992                         chk->data = NULL;
4993                 }
4994                 if (chk->holds_key_ref)
4995                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4996                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4997                 SCTP_DECR_CHK_COUNT();
4998                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4999                 asoc->free_chunk_cnt--;
5000                 /* sa_ignore FREED_MEMORY */
5001         }
5002         /* pending send queue SHOULD be empty */
5003         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5004                 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5005                         asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5006 #ifdef INVARIANTS
5007                 } else {
5008                         panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5009 #endif
5010                 }
5011                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5012                 if (chk->data) {
5013                         if (so) {
5014                                 /* Still a socket? */
5015                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5016                                     0, chk, SCTP_SO_LOCKED);
5017                         }
5018                         if (chk->data) {
5019                                 sctp_m_freem(chk->data);
5020                                 chk->data = NULL;
5021                         }
5022                 }
5023                 if (chk->holds_key_ref)
5024                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5025                 if (chk->whoTo) {
5026                         sctp_free_remote_addr(chk->whoTo);
5027                         chk->whoTo = NULL;
5028                 }
5029                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5030                 SCTP_DECR_CHK_COUNT();
5031                 /* sa_ignore FREED_MEMORY */
5032         }
5033         /* sent queue SHOULD be empty */
5034         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5035                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5036                         if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5037                                 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5038 #ifdef INVARIANTS
5039                         } else {
5040                                 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5041 #endif
5042                         }
5043                 }
5044                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5045                 if (chk->data) {
5046                         if (so) {
5047                                 /* Still a socket? */
5048                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5049                                     0, chk, SCTP_SO_LOCKED);
5050                         }
5051                         if (chk->data) {
5052                                 sctp_m_freem(chk->data);
5053                                 chk->data = NULL;
5054                         }
5055                 }
5056                 if (chk->holds_key_ref)
5057                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5058                 sctp_free_remote_addr(chk->whoTo);
5059                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5060                 SCTP_DECR_CHK_COUNT();
5061                 /* sa_ignore FREED_MEMORY */
5062         }
5063 #ifdef INVARIANTS
5064         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5065                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5066                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5067                 }
5068         }
5069 #endif
5070         /* control queue MAY not be empty */
5071         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5072                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5073                 if (chk->data) {
5074                         sctp_m_freem(chk->data);
5075                         chk->data = NULL;
5076                 }
5077                 if (chk->holds_key_ref)
5078                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5079                 sctp_free_remote_addr(chk->whoTo);
5080                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5081                 SCTP_DECR_CHK_COUNT();
5082                 /* sa_ignore FREED_MEMORY */
5083         }
5084         /* ASCONF queue MAY not be empty */
5085         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5086                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5087                 if (chk->data) {
5088                         sctp_m_freem(chk->data);
5089                         chk->data = NULL;
5090                 }
5091                 if (chk->holds_key_ref)
5092                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5093                 sctp_free_remote_addr(chk->whoTo);
5094                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5095                 SCTP_DECR_CHK_COUNT();
5096                 /* sa_ignore FREED_MEMORY */
5097         }
5098         if (asoc->mapping_array) {
5099                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5100                 asoc->mapping_array = NULL;
5101         }
5102         if (asoc->nr_mapping_array) {
5103                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5104                 asoc->nr_mapping_array = NULL;
5105         }
5106         /* the stream outs */
5107         if (asoc->strmout) {
5108                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5109                 asoc->strmout = NULL;
5110         }
5111         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5112         if (asoc->strmin) {
5113                 for (i = 0; i < asoc->streamincnt; i++) {
5114                         sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5115                         sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5116                 }
5117                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5118                 asoc->strmin = NULL;
5119         }
5120         asoc->streamincnt = 0;
5121         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5122 #ifdef INVARIANTS
5123                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5124                         panic("no net's left alloc'ed, or list points to itself");
5125                 }
5126 #endif
5127                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5128                 sctp_free_remote_addr(net);
5129         }
5130         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5131                 /* sa_ignore FREED_MEMORY */
5132                 sctp_remove_laddr(laddr);
5133         }
5134
5135         /* pending asconf (address) parameters */
5136         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5137                 /* sa_ignore FREED_MEMORY */
5138                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5139                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5140         }
5141         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5142                 /* sa_ignore FREED_MEMORY */
5143                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5144                 if (aack->data != NULL) {
5145                         sctp_m_freem(aack->data);
5146                 }
5147                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5148         }
5149         /* clean up auth stuff */
5150         if (asoc->local_hmacs)
5151                 sctp_free_hmaclist(asoc->local_hmacs);
5152         if (asoc->peer_hmacs)
5153                 sctp_free_hmaclist(asoc->peer_hmacs);
5154
5155         if (asoc->local_auth_chunks)
5156                 sctp_free_chunklist(asoc->local_auth_chunks);
5157         if (asoc->peer_auth_chunks)
5158                 sctp_free_chunklist(asoc->peer_auth_chunks);
5159
5160         sctp_free_authinfo(&asoc->authinfo);
5161
5162         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5163                 LIST_REMOVE(shared_key, next);
5164                 sctp_free_sharedkey(shared_key);
5165                 /* sa_ignore FREED_MEMORY */
5166         }
5167
5168         /* Insert new items here :> */
5169
5170         /* Get rid of LOCK */
5171         SCTP_TCB_UNLOCK(stcb);
5172         SCTP_TCB_LOCK_DESTROY(stcb);
5173         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5174         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5175                 SCTP_INP_INFO_WUNLOCK();
5176                 SCTP_INP_RLOCK(inp);
5177         }
5178 #ifdef SCTP_TRACK_FREED_ASOCS
5179         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5180                 /* now clean up the tasoc itself */
5181                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5182                 SCTP_DECR_ASOC_COUNT();
5183         } else {
5184                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5185         }
5186 #else
5187         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5188         SCTP_DECR_ASOC_COUNT();
5189 #endif
5190         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5191                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5192                         /*
5193                          * If its NOT the inp_free calling us AND sctp_close
5194                          * as been called, we call back...
5195                          */
5196                         SCTP_INP_RUNLOCK(inp);
5197                         /*
5198                          * This will start the kill timer (if we are the
5199                          * last one) since we hold an increment yet. But
5200                          * this is the only safe way to do this since
5201                          * otherwise if the socket closes at the same time
5202                          * we are here we might collide in the cleanup.
5203                          */
5204                         sctp_inpcb_free(inp,
5205                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5206                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5207                         SCTP_INP_DECR_REF(inp);
5208                         goto out_of;
5209                 } else {
5210                         /* The socket is still open. */
5211                         SCTP_INP_DECR_REF(inp);
5212                 }
5213         }
5214         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5215                 SCTP_INP_RUNLOCK(inp);
5216         }
5217 out_of:
5218         /* destroyed the asoc */
5219 #ifdef SCTP_LOG_CLOSING
5220         sctp_log_closing(inp, NULL, 11);
5221 #endif
5222         return (1);
5223 }
5224
5225
5226
5227 /*
5228  * determine if a destination is "reachable" based upon the addresses bound
5229  * to the current endpoint (e.g. only v4 or v6 currently bound)
5230  */
5231 /*
5232  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5233  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5234  * types bound as its endpoint
5235  */
5236 int
5237 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5238 {
5239         struct sctp_inpcb *inp;
5240         int answer;
5241
5242         /*
5243          * No locks here, the TCB, in all cases is already locked and an
5244          * assoc is up. There is either a INP lock by the caller applied (in
5245          * asconf case when deleting an address) or NOT in the HB case,
5246          * however if HB then the INP increment is up and the INP will not
5247          * be removed (on top of the fact that we have a TCB lock). So we
5248          * only want to read the sctp_flags, which is either bound-all or
5249          * not.. no protection needed since once an assoc is up you can't be
5250          * changing your binding.
5251          */
5252         inp = stcb->sctp_ep;
5253         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5254                 /* if bound all, destination is not restricted */
5255                 /*
5256                  * RRS: Question during lock work: Is this correct? If you
5257                  * are bound-all you still might need to obey the V4--V6
5258                  * flags??? IMO this bound-all stuff needs to be removed!
5259                  */
5260                 return (1);
5261         }
5262         /* NOTE: all "scope" checks are done when local addresses are added */
5263         switch (destaddr->sa_family) {
5264 #ifdef INET6
5265         case AF_INET6:
5266                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5267                 break;
5268 #endif
5269 #ifdef INET
5270         case AF_INET:
5271                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5272                 break;
5273 #endif
5274         default:
5275                 /* invalid family, so it's unreachable */
5276                 answer = 0;
5277                 break;
5278         }
5279         return (answer);
5280 }
5281
5282 /*
5283  * update the inp_vflags on an endpoint
5284  */
5285 static void
5286 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5287 {
5288         struct sctp_laddr *laddr;
5289
5290         /* first clear the flag */
5291         inp->ip_inp.inp.inp_vflag = 0;
5292         /* set the flag based on addresses on the ep list */
5293         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5294                 if (laddr->ifa == NULL) {
5295                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5296                             __func__);
5297                         continue;
5298                 }
5299                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5300                         continue;
5301                 }
5302                 switch (laddr->ifa->address.sa.sa_family) {
5303 #ifdef INET6
5304                 case AF_INET6:
5305                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5306                         break;
5307 #endif
5308 #ifdef INET
5309                 case AF_INET:
5310                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5311                         break;
5312 #endif
5313                 default:
5314                         break;
5315                 }
5316         }
5317 }
5318
5319 /*
5320  * Add the address to the endpoint local address list There is nothing to be
5321  * done if we are bound to all addresses
5322  */
5323 void
5324 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5325 {
5326         struct sctp_laddr *laddr;
5327         struct sctp_tcb *stcb;
5328         int fnd, error = 0;
5329
5330         fnd = 0;
5331
5332         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5333                 /* You are already bound to all. You have it already */
5334                 return;
5335         }
5336 #ifdef INET6
5337         if (ifa->address.sa.sa_family == AF_INET6) {
5338                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5339                         /* Can't bind a non-useable addr. */
5340                         return;
5341                 }
5342         }
5343 #endif
5344         /* first, is it already present? */
5345         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5346                 if (laddr->ifa == ifa) {
5347                         fnd = 1;
5348                         break;
5349                 }
5350         }
5351
5352         if (fnd == 0) {
5353                 /* Not in the ep list */
5354                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5355                 if (error != 0)
5356                         return;
5357                 inp->laddr_count++;
5358                 /* update inp_vflag flags */
5359                 switch (ifa->address.sa.sa_family) {
5360 #ifdef INET6
5361                 case AF_INET6:
5362                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5363                         break;
5364 #endif
5365 #ifdef INET
5366                 case AF_INET:
5367                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5368                         break;
5369 #endif
5370                 default:
5371                         break;
5372                 }
5373                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5374                         sctp_add_local_addr_restricted(stcb, ifa);
5375                 }
5376         }
5377         return;
5378 }
5379
5380
5381 /*
5382  * select a new (hopefully reachable) destination net (should only be used
5383  * when we deleted an ep addr that is the only usable source address to reach
5384  * the destination net)
5385  */
5386 static void
5387 sctp_select_primary_destination(struct sctp_tcb *stcb)
5388 {
5389         struct sctp_nets *net;
5390
5391         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5392                 /* for now, we'll just pick the first reachable one we find */
5393                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5394                         continue;
5395                 if (sctp_destination_is_reachable(stcb,
5396                     (struct sockaddr *)&net->ro._l_addr)) {
5397                         /* found a reachable destination */
5398                         stcb->asoc.primary_destination = net;
5399                 }
5400         }
5401         /* I can't there from here! ...we're gonna die shortly... */
5402 }
5403
5404
5405 /*
5406  * Delete the address from the endpoint local address list. There is nothing
5407  * to be done if we are bound to all addresses
5408  */
5409 void
5410 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5411 {
5412         struct sctp_laddr *laddr;
5413         int fnd;
5414
5415         fnd = 0;
5416         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5417                 /* You are already bound to all. You have it already */
5418                 return;
5419         }
5420         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5421                 if (laddr->ifa == ifa) {
5422                         fnd = 1;
5423                         break;
5424                 }
5425         }
5426         if (fnd && (inp->laddr_count < 2)) {
5427                 /* can't delete unless there are at LEAST 2 addresses */
5428                 return;
5429         }
5430         if (fnd) {
5431                 /*
5432                  * clean up any use of this address go through our
5433                  * associations and clear any last_used_address that match
5434                  * this one for each assoc, see if a new primary_destination
5435                  * is needed
5436                  */
5437                 struct sctp_tcb *stcb;
5438
5439                 /* clean up "next_addr_touse" */
5440                 if (inp->next_addr_touse == laddr)
5441                         /* delete this address */
5442                         inp->next_addr_touse = NULL;
5443
5444                 /* clean up "last_used_address" */
5445                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5446                         struct sctp_nets *net;
5447
5448                         SCTP_TCB_LOCK(stcb);
5449                         if (stcb->asoc.last_used_address == laddr)
5450                                 /* delete this address */
5451                                 stcb->asoc.last_used_address = NULL;
5452                         /*
5453                          * Now spin through all the nets and purge any ref
5454                          * to laddr
5455                          */
5456                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5457                                 if (net->ro._s_addr == laddr->ifa) {
5458                                         /* Yep, purge src address selected */
5459                                         sctp_rtentry_t *rt;
5460
5461                                         /* delete this address if cached */
5462                                         rt = net->ro.ro_rt;
5463                                         if (rt != NULL) {
5464                                                 RTFREE(rt);
5465                                                 net->ro.ro_rt = NULL;
5466                                         }
5467                                         sctp_free_ifa(net->ro._s_addr);
5468                                         net->ro._s_addr = NULL;
5469                                         net->src_addr_selected = 0;
5470                                 }
5471                         }
5472                         SCTP_TCB_UNLOCK(stcb);
5473                 }               /* for each tcb */
5474                 /* remove it from the ep list */
5475                 sctp_remove_laddr(laddr);
5476                 inp->laddr_count--;
5477                 /* update inp_vflag flags */
5478                 sctp_update_ep_vflag(inp);
5479         }
5480         return;
5481 }
5482
5483 /*
5484  * Add the address to the TCB local address restricted list.
5485  * This is a "pending" address list (eg. addresses waiting for an
5486  * ASCONF-ACK response) and cannot be used as a valid source address.
5487  */
5488 void
5489 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5490 {
5491         struct sctp_laddr *laddr;
5492         struct sctpladdr *list;
5493
5494         /*
5495          * Assumes TCB is locked.. and possibly the INP. May need to
5496          * confirm/fix that if we need it and is not the case.
5497          */
5498         list = &stcb->asoc.sctp_restricted_addrs;
5499
5500 #ifdef INET6
5501         if (ifa->address.sa.sa_family == AF_INET6) {
5502                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5503                         /* Can't bind a non-existent addr. */
5504                         return;
5505                 }
5506         }
5507 #endif
5508         /* does the address already exist? */
5509         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5510                 if (laddr->ifa == ifa) {
5511                         return;
5512                 }
5513         }
5514
5515         /* add to the list */
5516         (void)sctp_insert_laddr(list, ifa, 0);
5517         return;
5518 }
5519
5520 /*
5521  * Remove a local address from the TCB local address restricted list
5522  */
5523 void
5524 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5525 {
5526         struct sctp_inpcb *inp;
5527         struct sctp_laddr *laddr;
5528
5529         /*
5530          * This is called by asconf work. It is assumed that a) The TCB is
5531          * locked and b) The INP is locked. This is true in as much as I can
5532          * trace through the entry asconf code where I did these locks.
5533          * Again, the ASCONF code is a bit different in that it does lock
5534          * the INP during its work often times. This must be since we don't
5535          * want other proc's looking up things while what they are looking
5536          * up is changing :-D
5537          */
5538
5539         inp = stcb->sctp_ep;
5540         /* if subset bound and don't allow ASCONF's, can't delete last */
5541         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5542             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5543                 if (stcb->sctp_ep->laddr_count < 2) {
5544                         /* can't delete last address */
5545                         return;
5546                 }
5547         }
5548         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5549                 /* remove the address if it exists */
5550                 if (laddr->ifa == NULL)
5551                         continue;
5552                 if (laddr->ifa == ifa) {
5553                         sctp_remove_laddr(laddr);
5554                         return;
5555                 }
5556         }
5557
5558         /* address not found! */
5559         return;
5560 }
5561
5562 /*
5563  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5564  */
5565 /* sysctl */
5566 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5567 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5568
5569
5570
5571 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5572 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5573 int *sctp_cpuarry = NULL;
5574 void
5575 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5576 {
5577         /* Queue a packet to a processor for the specified core */
5578         struct sctp_mcore_queue *qent;
5579         struct sctp_mcore_ctrl *wkq;
5580         int need_wake = 0;
5581
5582         if (sctp_mcore_workers == NULL) {
5583                 /* Something went way bad during setup */
5584                 sctp_input_with_port(m, off, 0);
5585                 return;
5586         }
5587         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5588             (sizeof(struct sctp_mcore_queue)),
5589             SCTP_M_MCORE);
5590         if (qent == NULL) {
5591                 /* This is trouble  */
5592                 sctp_input_with_port(m, off, 0);
5593                 return;
5594         }
5595         qent->vn = curvnet;
5596         qent->m = m;
5597         qent->off = off;
5598         qent->v6 = 0;
5599         wkq = &sctp_mcore_workers[cpu_to_use];
5600         SCTP_MCORE_QLOCK(wkq);
5601
5602         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5603         if (wkq->running == 0) {
5604                 need_wake = 1;
5605         }
5606         SCTP_MCORE_QUNLOCK(wkq);
5607         if (need_wake) {
5608                 wakeup(&wkq->running);
5609         }
5610 }
5611
5612 static void
5613 sctp_mcore_thread(void *arg)
5614 {
5615
5616         struct sctp_mcore_ctrl *wkq;
5617         struct sctp_mcore_queue *qent;
5618
5619         wkq = (struct sctp_mcore_ctrl *)arg;
5620         struct mbuf *m;
5621         int off, v6;
5622
5623         /* Wait for first tickle */
5624         SCTP_MCORE_LOCK(wkq);
5625         wkq->running = 0;
5626         msleep(&wkq->running,
5627             &wkq->core_mtx,
5628             0, "wait for pkt", 0);
5629         SCTP_MCORE_UNLOCK(wkq);
5630
5631         /* Bind to our cpu */
5632         thread_lock(curthread);
5633         sched_bind(curthread, wkq->cpuid);
5634         thread_unlock(curthread);
5635
5636         /* Now lets start working */
5637         SCTP_MCORE_LOCK(wkq);
5638         /* Now grab lock and go */
5639         for (;;) {
5640                 SCTP_MCORE_QLOCK(wkq);
5641 skip_sleep:
5642                 wkq->running = 1;
5643                 qent = TAILQ_FIRST(&wkq->que);
5644                 if (qent) {
5645                         TAILQ_REMOVE(&wkq->que, qent, next);
5646                         SCTP_MCORE_QUNLOCK(wkq);
5647                         CURVNET_SET(qent->vn);
5648                         m = qent->m;
5649                         off = qent->off;
5650                         v6 = qent->v6;
5651                         SCTP_FREE(qent, SCTP_M_MCORE);
5652                         if (v6 == 0) {
5653                                 sctp_input_with_port(m, off, 0);
5654                         } else {
5655                                 SCTP_PRINTF("V6 not yet supported\n");
5656                                 sctp_m_freem(m);
5657                         }
5658                         CURVNET_RESTORE();
5659                         SCTP_MCORE_QLOCK(wkq);
5660                 }
5661                 wkq->running = 0;
5662                 if (!TAILQ_EMPTY(&wkq->que)) {
5663                         goto skip_sleep;
5664                 }
5665                 SCTP_MCORE_QUNLOCK(wkq);
5666                 msleep(&wkq->running,
5667                     &wkq->core_mtx,
5668                     0, "wait for pkt", 0);
5669         }
5670 }
5671
5672 static void
5673 sctp_startup_mcore_threads(void)
5674 {
5675         int i, cpu;
5676
5677         if (mp_ncpus == 1)
5678                 return;
5679
5680         if (sctp_mcore_workers != NULL) {
5681                 /*
5682                  * Already been here in some previous vnet?
5683                  */
5684                 return;
5685         }
5686         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5687             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5688             SCTP_M_MCORE);
5689         if (sctp_mcore_workers == NULL) {
5690                 /* TSNH I hope */
5691                 return;
5692         }
5693         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5694             sizeof(struct sctp_mcore_ctrl)));
5695         /* Init the structures */
5696         for (i = 0; i <= mp_maxid; i++) {
5697                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5698                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5699                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5700                 sctp_mcore_workers[i].cpuid = i;
5701         }
5702         if (sctp_cpuarry == NULL) {
5703                 SCTP_MALLOC(sctp_cpuarry, int *,
5704                     (mp_ncpus * sizeof(int)),
5705                     SCTP_M_MCORE);
5706                 i = 0;
5707                 CPU_FOREACH(cpu) {
5708                         sctp_cpuarry[i] = cpu;
5709                         i++;
5710                 }
5711         }
5712         /* Now start them all */
5713         CPU_FOREACH(cpu) {
5714                 (void)kproc_create(sctp_mcore_thread,
5715                     (void *)&sctp_mcore_workers[cpu],
5716                     &sctp_mcore_workers[cpu].thread_proc,
5717                     RFPROC,
5718                     SCTP_KTHREAD_PAGES,
5719                     SCTP_MCORE_NAME);
5720
5721         }
5722 }
5723 #endif
5724
5725 void
5726 sctp_pcb_init()
5727 {
5728         /*
5729          * SCTP initialization for the PCB structures should be called by
5730          * the sctp_init() function.
5731          */
5732         int i;
5733         struct timeval tv;
5734
5735         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5736                 /* error I was called twice */
5737                 return;
5738         }
5739         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5740
5741 #if defined(SCTP_LOCAL_TRACE_BUF)
5742         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5743 #endif
5744 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5745         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5746             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5747             SCTP_M_MCORE);
5748 #endif
5749         (void)SCTP_GETTIME_TIMEVAL(&tv);
5750 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5751         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5752         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
5753         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
5754 #else
5755         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5756         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
5757         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
5758 #endif
5759         /* init the empty list of (All) Endpoints */
5760         LIST_INIT(&SCTP_BASE_INFO(listhead));
5761
5762
5763         /* init the hash table of endpoints */
5764         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5765         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5766         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5767         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5768             &SCTP_BASE_INFO(hashasocmark));
5769         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5770             &SCTP_BASE_INFO(hashmark));
5771         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5772             &SCTP_BASE_INFO(hashtcpmark));
5773         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5774
5775
5776         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5777             &SCTP_BASE_INFO(hashvrfmark));
5778
5779         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5780             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5781         /* init the zones */
5782         /*
5783          * FIX ME: Should check for NULL returns, but if it does fail we are
5784          * doomed to panic anyways... add later maybe.
5785          */
5786         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5787             sizeof(struct sctp_inpcb), maxsockets);
5788
5789         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5790             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5791
5792         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5793             sizeof(struct sctp_laddr),
5794             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5795
5796         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5797             sizeof(struct sctp_nets),
5798             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5799
5800         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5801             sizeof(struct sctp_tmit_chunk),
5802             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5803
5804         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5805             sizeof(struct sctp_queued_to_read),
5806             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5807
5808         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5809             sizeof(struct sctp_stream_queue_pending),
5810             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5811
5812         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5813             sizeof(struct sctp_asconf),
5814             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5815
5816         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5817             sizeof(struct sctp_asconf_ack),
5818             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5819
5820
5821         /* Master Lock INIT for info structure */
5822         SCTP_INP_INFO_LOCK_INIT();
5823         SCTP_STATLOG_INIT_LOCK();
5824
5825         SCTP_IPI_COUNT_INIT();
5826         SCTP_IPI_ADDR_INIT();
5827 #ifdef SCTP_PACKET_LOGGING
5828         SCTP_IP_PKTLOG_INIT();
5829 #endif
5830         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5831
5832         SCTP_WQ_ADDR_INIT();
5833         /* not sure if we need all the counts */
5834         SCTP_BASE_INFO(ipi_count_ep) = 0;
5835         /* assoc/tcb zone info */
5836         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5837         /* local addrlist zone info */
5838         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5839         /* remote addrlist zone info */
5840         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5841         /* chunk info */
5842         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5843
5844         /* socket queue zone info */
5845         SCTP_BASE_INFO(ipi_count_readq) = 0;
5846
5847         /* stream out queue cont */
5848         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5849
5850         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5851         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5852
5853         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5854
5855         /* Init the TIMEWAIT list */
5856         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5857                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5858         }
5859         sctp_startup_iterator();
5860
5861 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5862         sctp_startup_mcore_threads();
5863 #endif
5864
5865         /*
5866          * INIT the default VRF which for BSD is the only one, other O/S's
5867          * may have more. But initially they must start with one and then
5868          * add the VRF's as addresses are added.
5869          */
5870         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5871 }
5872
5873 /*
5874  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5875  */
5876 void
5877 sctp_pcb_finish(void)
5878 {
5879         struct sctp_vrflist *vrf_bucket;
5880         struct sctp_vrf *vrf, *nvrf;
5881         struct sctp_ifn *ifn, *nifn;
5882         struct sctp_ifa *ifa, *nifa;
5883         struct sctpvtaghead *chain;
5884         struct sctp_tagblock *twait_block, *prev_twait_block;
5885         struct sctp_laddr *wi, *nwi;
5886         int i;
5887         struct sctp_iterator *it, *nit;
5888
5889         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5890                 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5891                 return;
5892         }
5893         SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5894         /*
5895          * In FreeBSD the iterator thread never exits but we do clean up.
5896          * The only way FreeBSD reaches here is if we have VRF's but we
5897          * still add the ifdef to make it compile on old versions.
5898          */
5899 retry:
5900         SCTP_IPI_ITERATOR_WQ_LOCK();
5901         /*
5902          * sctp_iterator_worker() might be working on an it entry without
5903          * holding the lock.  We won't find it on the list either and
5904          * continue and free/destroy it.  While holding the lock, spin, to
5905          * avoid the race condition as sctp_iterator_worker() will have to
5906          * wait to re-aquire the lock.
5907          */
5908         if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5909                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5910                 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5911                     "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5912                 DELAY(10);
5913                 goto retry;
5914         }
5915         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5916                 if (it->vn != curvnet) {
5917                         continue;
5918                 }
5919                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5920                 if (it->function_atend != NULL) {
5921                         (*it->function_atend) (it->pointer, it->val);
5922                 }
5923                 SCTP_FREE(it, SCTP_M_ITER);
5924         }
5925         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5926         SCTP_ITERATOR_LOCK();
5927         if ((sctp_it_ctl.cur_it) &&
5928             (sctp_it_ctl.cur_it->vn == curvnet)) {
5929                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5930         }
5931         SCTP_ITERATOR_UNLOCK();
5932         SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5933         SCTP_WQ_ADDR_LOCK();
5934         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5935                 LIST_REMOVE(wi, sctp_nxt_addr);
5936                 SCTP_DECR_LADDR_COUNT();
5937                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5938                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
5939                 }
5940                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5941         }
5942         SCTP_WQ_ADDR_UNLOCK();
5943
5944         /*
5945          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5946          * destroyed first).
5947          */
5948         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5949         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5950                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5951                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5952                                 /* free the ifa */
5953                                 LIST_REMOVE(ifa, next_bucket);
5954                                 LIST_REMOVE(ifa, next_ifa);
5955                                 SCTP_FREE(ifa, SCTP_M_IFA);
5956                         }
5957                         /* free the ifn */
5958                         LIST_REMOVE(ifn, next_bucket);
5959                         LIST_REMOVE(ifn, next_ifn);
5960                         SCTP_FREE(ifn, SCTP_M_IFN);
5961                 }
5962                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5963                 /* free the vrf */
5964                 LIST_REMOVE(vrf, next_vrf);
5965                 SCTP_FREE(vrf, SCTP_M_VRF);
5966         }
5967         /* free the vrf hashes */
5968         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5969         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5970
5971         /*
5972          * free the TIMEWAIT list elements malloc'd in the function
5973          * sctp_add_vtag_to_timewait()...
5974          */
5975         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5976                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5977                 if (!LIST_EMPTY(chain)) {
5978                         prev_twait_block = NULL;
5979                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5980                                 if (prev_twait_block) {
5981                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5982                                 }
5983                                 prev_twait_block = twait_block;
5984                         }
5985                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5986                 }
5987         }
5988
5989         /* free the locks and mutexes */
5990 #ifdef SCTP_PACKET_LOGGING
5991         SCTP_IP_PKTLOG_DESTROY();
5992 #endif
5993         SCTP_IPI_ADDR_DESTROY();
5994         SCTP_STATLOG_DESTROY();
5995         SCTP_INP_INFO_LOCK_DESTROY();
5996
5997         SCTP_WQ_ADDR_DESTROY();
5998
5999         /* Get rid of other stuff too. */
6000         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6001                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6002         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6003                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6004         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6005                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6006
6007         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6008         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6009         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6010         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6011         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6012         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6013         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6014         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6015         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6016 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6017         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6018 #endif
6019 }
6020
6021
6022 int
6023 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6024     int offset, int limit,
6025     struct sockaddr *src, struct sockaddr *dst,
6026     struct sockaddr *altsa, uint16_t port)
6027 {
6028         /*
6029          * grub through the INIT pulling addresses and loading them to the
6030          * nets structure in the asoc. The from address in the mbuf should
6031          * also be loaded (if it is not already). This routine can be called
6032          * with either INIT or INIT-ACK's as long as the m points to the IP
6033          * packet and the offset points to the beginning of the parameters.
6034          */
6035         struct sctp_inpcb *inp;
6036         struct sctp_nets *net, *nnet, *net_tmp;
6037         struct sctp_paramhdr *phdr, parm_buf;
6038         struct sctp_tcb *stcb_tmp;
6039         uint16_t ptype, plen;
6040         struct sockaddr *sa;
6041         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6042         struct sctp_auth_random *p_random = NULL;
6043         uint16_t random_len = 0;
6044         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6045         struct sctp_auth_hmac_algo *hmacs = NULL;
6046         uint16_t hmacs_len = 0;
6047         uint8_t saw_asconf = 0;
6048         uint8_t saw_asconf_ack = 0;
6049         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6050         struct sctp_auth_chunk_list *chunks = NULL;
6051         uint16_t num_chunks = 0;
6052         sctp_key_t *new_key;
6053         uint32_t keylen;
6054         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6055         uint8_t peer_supports_ecn;
6056         uint8_t peer_supports_prsctp;
6057         uint8_t peer_supports_auth;
6058         uint8_t peer_supports_asconf;
6059         uint8_t peer_supports_asconf_ack;
6060         uint8_t peer_supports_reconfig;
6061         uint8_t peer_supports_nrsack;
6062         uint8_t peer_supports_pktdrop;
6063         uint8_t peer_supports_idata;
6064 #ifdef INET
6065         struct sockaddr_in sin;
6066 #endif
6067 #ifdef INET6
6068         struct sockaddr_in6 sin6;
6069 #endif
6070
6071         /* First get the destination address setup too. */
6072 #ifdef INET
6073         memset(&sin, 0, sizeof(sin));
6074         sin.sin_family = AF_INET;
6075         sin.sin_len = sizeof(sin);
6076         sin.sin_port = stcb->rport;
6077 #endif
6078 #ifdef INET6
6079         memset(&sin6, 0, sizeof(sin6));
6080         sin6.sin6_family = AF_INET6;
6081         sin6.sin6_len = sizeof(struct sockaddr_in6);
6082         sin6.sin6_port = stcb->rport;
6083 #endif
6084         if (altsa) {
6085                 sa = altsa;
6086         } else {
6087                 sa = src;
6088         }
6089         peer_supports_idata = 0;
6090         peer_supports_ecn = 0;
6091         peer_supports_prsctp = 0;
6092         peer_supports_auth = 0;
6093         peer_supports_asconf = 0;
6094         peer_supports_reconfig = 0;
6095         peer_supports_nrsack = 0;
6096         peer_supports_pktdrop = 0;
6097         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6098                 /* mark all addresses that we have currently on the list */
6099                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6100         }
6101         /* does the source address already exist? if so skip it */
6102         inp = stcb->sctp_ep;
6103         atomic_add_int(&stcb->asoc.refcnt, 1);
6104         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6105         atomic_add_int(&stcb->asoc.refcnt, -1);
6106
6107         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6108                 /* we must add the source address */
6109                 /* no scope set here since we have a tcb already. */
6110                 switch (sa->sa_family) {
6111 #ifdef INET
6112                 case AF_INET:
6113                         if (stcb->asoc.scope.ipv4_addr_legal) {
6114                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6115                                         return (-1);
6116                                 }
6117                         }
6118                         break;
6119 #endif
6120 #ifdef INET6
6121                 case AF_INET6:
6122                         if (stcb->asoc.scope.ipv6_addr_legal) {
6123                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6124                                         return (-2);
6125                                 }
6126                         }
6127                         break;
6128 #endif
6129                 default:
6130                         break;
6131                 }
6132         } else {
6133                 if (net_tmp != NULL && stcb_tmp == stcb) {
6134                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6135                 } else if (stcb_tmp != stcb) {
6136                         /* It belongs to another association? */
6137                         if (stcb_tmp)
6138                                 SCTP_TCB_UNLOCK(stcb_tmp);
6139                         return (-3);
6140                 }
6141         }
6142         if (stcb->asoc.state == 0) {
6143                 /* the assoc was freed? */
6144                 return (-4);
6145         }
6146         /* now we must go through each of the params. */
6147         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6148         while (phdr) {
6149                 ptype = ntohs(phdr->param_type);
6150                 plen = ntohs(phdr->param_length);
6151                 /*
6152                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6153                  * (uint32_t)ptype, (int)plen);
6154                  */
6155                 if (offset + plen > limit) {
6156                         break;
6157                 }
6158                 if (plen == 0) {
6159                         break;
6160                 }
6161 #ifdef INET
6162                 if (ptype == SCTP_IPV4_ADDRESS) {
6163                         if (stcb->asoc.scope.ipv4_addr_legal) {
6164                                 struct sctp_ipv4addr_param *p4, p4_buf;
6165
6166                                 /* ok get the v4 address and check/add */
6167                                 phdr = sctp_get_next_param(m, offset,
6168                                     (struct sctp_paramhdr *)&p4_buf,
6169                                     sizeof(p4_buf));
6170                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6171                                     phdr == NULL) {
6172                                         return (-5);
6173                                 }
6174                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6175                                 sin.sin_addr.s_addr = p4->addr;
6176                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6177                                         /* Skip multi-cast addresses */
6178                                         goto next_param;
6179                                 }
6180                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6181                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6182                                         goto next_param;
6183                                 }
6184                                 sa = (struct sockaddr *)&sin;
6185                                 inp = stcb->sctp_ep;
6186                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6187                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6188                                     dst, stcb);
6189                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6190
6191                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6192                                     inp == NULL) {
6193                                         /* we must add the source address */
6194                                         /*
6195                                          * no scope set since we have a tcb
6196                                          * already
6197                                          */
6198
6199                                         /*
6200                                          * we must validate the state again
6201                                          * here
6202                                          */
6203                         add_it_now:
6204                                         if (stcb->asoc.state == 0) {
6205                                                 /* the assoc was freed? */
6206                                                 return (-7);
6207                                         }
6208                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6209                                                 return (-8);
6210                                         }
6211                                 } else if (stcb_tmp == stcb) {
6212                                         if (stcb->asoc.state == 0) {
6213                                                 /* the assoc was freed? */
6214                                                 return (-10);
6215                                         }
6216                                         if (net != NULL) {
6217                                                 /* clear flag */
6218                                                 net->dest_state &=
6219                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6220                                         }
6221                                 } else {
6222                                         /*
6223                                          * strange, address is in another
6224                                          * assoc? straighten out locks.
6225                                          */
6226                                         if (stcb_tmp) {
6227                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6228                                                         struct mbuf *op_err;
6229                                                         char msg[SCTP_DIAG_INFO_LEN];
6230
6231                                                         /*
6232                                                          * in setup state we
6233                                                          * abort this guy
6234                                                          */
6235                                                         snprintf(msg, sizeof(msg),
6236                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6237                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6238                                                             msg);
6239                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6240                                                             stcb_tmp, op_err,
6241                                                             SCTP_SO_NOT_LOCKED);
6242                                                         goto add_it_now;
6243                                                 }
6244                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6245                                         }
6246                                         if (stcb->asoc.state == 0) {
6247                                                 /* the assoc was freed? */
6248                                                 return (-12);
6249                                         }
6250                                         return (-13);
6251                                 }
6252                         }
6253                 } else
6254 #endif
6255 #ifdef INET6
6256                 if (ptype == SCTP_IPV6_ADDRESS) {
6257                         if (stcb->asoc.scope.ipv6_addr_legal) {
6258                                 /* ok get the v6 address and check/add */
6259                                 struct sctp_ipv6addr_param *p6, p6_buf;
6260
6261                                 phdr = sctp_get_next_param(m, offset,
6262                                     (struct sctp_paramhdr *)&p6_buf,
6263                                     sizeof(p6_buf));
6264                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6265                                     phdr == NULL) {
6266                                         return (-14);
6267                                 }
6268                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6269                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6270                                     sizeof(p6->addr));
6271                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6272                                         /* Skip multi-cast addresses */
6273                                         goto next_param;
6274                                 }
6275                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6276                                         /*
6277                                          * Link local make no sense without
6278                                          * scope
6279                                          */
6280                                         goto next_param;
6281                                 }
6282                                 sa = (struct sockaddr *)&sin6;
6283                                 inp = stcb->sctp_ep;
6284                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6285                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6286                                     dst, stcb);
6287                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6288                                 if (stcb_tmp == NULL &&
6289                                     (inp == stcb->sctp_ep || inp == NULL)) {
6290                                         /*
6291                                          * we must validate the state again
6292                                          * here
6293                                          */
6294                         add_it_now6:
6295                                         if (stcb->asoc.state == 0) {
6296                                                 /* the assoc was freed? */
6297                                                 return (-16);
6298                                         }
6299                                         /*
6300                                          * we must add the address, no scope
6301                                          * set
6302                                          */
6303                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6304                                                 return (-17);
6305                                         }
6306                                 } else if (stcb_tmp == stcb) {
6307                                         /*
6308                                          * we must validate the state again
6309                                          * here
6310                                          */
6311                                         if (stcb->asoc.state == 0) {
6312                                                 /* the assoc was freed? */
6313                                                 return (-19);
6314                                         }
6315                                         if (net != NULL) {
6316                                                 /* clear flag */
6317                                                 net->dest_state &=
6318                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6319                                         }
6320                                 } else {
6321                                         /*
6322                                          * strange, address is in another
6323                                          * assoc? straighten out locks.
6324                                          */
6325                                         if (stcb_tmp) {
6326                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6327                                                         struct mbuf *op_err;
6328                                                         char msg[SCTP_DIAG_INFO_LEN];
6329
6330                                                         /*
6331                                                          * in setup state we
6332                                                          * abort this guy
6333                                                          */
6334                                                         snprintf(msg, sizeof(msg),
6335                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6336                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6337                                                             msg);
6338                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6339                                                             stcb_tmp, op_err,
6340                                                             SCTP_SO_NOT_LOCKED);
6341                                                         goto add_it_now6;
6342                                                 }
6343                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6344                                         }
6345                                         if (stcb->asoc.state == 0) {
6346                                                 /* the assoc was freed? */
6347                                                 return (-21);
6348                                         }
6349                                         return (-22);
6350                                 }
6351                         }
6352                 } else
6353 #endif
6354                 if (ptype == SCTP_ECN_CAPABLE) {
6355                         peer_supports_ecn = 1;
6356                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6357                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6358                                 struct sctp_adaptation_layer_indication ai,
6359                                                                 *aip;
6360
6361                                 phdr = sctp_get_next_param(m, offset,
6362                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6363                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6364                                 if (aip) {
6365                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6366                                         stcb->asoc.adaptation_needed = 1;
6367                                 }
6368                         }
6369                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6370                         struct sctp_asconf_addr_param lstore, *fee;
6371                         int lptype;
6372                         struct sockaddr *lsa = NULL;
6373 #ifdef INET
6374                         struct sctp_asconf_addrv4_param *fii;
6375 #endif
6376
6377                         if (stcb->asoc.asconf_supported == 0) {
6378                                 return (-100);
6379                         }
6380                         if (plen > sizeof(lstore)) {
6381                                 return (-23);
6382                         }
6383                         phdr = sctp_get_next_param(m, offset,
6384                             (struct sctp_paramhdr *)&lstore,
6385                             min(plen, sizeof(lstore)));
6386                         if (phdr == NULL) {
6387                                 return (-24);
6388                         }
6389                         fee = (struct sctp_asconf_addr_param *)phdr;
6390                         lptype = ntohs(fee->addrp.ph.param_type);
6391                         switch (lptype) {
6392 #ifdef INET
6393                         case SCTP_IPV4_ADDRESS:
6394                                 if (plen !=
6395                                     sizeof(struct sctp_asconf_addrv4_param)) {
6396                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6397                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6398                                             plen);
6399                                 } else {
6400                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6401                                         sin.sin_addr.s_addr = fii->addrp.addr;
6402                                         lsa = (struct sockaddr *)&sin;
6403                                 }
6404                                 break;
6405 #endif
6406 #ifdef INET6
6407                         case SCTP_IPV6_ADDRESS:
6408                                 if (plen !=
6409                                     sizeof(struct sctp_asconf_addr_param)) {
6410                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6411                                             (int)sizeof(struct sctp_asconf_addr_param),
6412                                             plen);
6413                                 } else {
6414                                         memcpy(sin6.sin6_addr.s6_addr,
6415                                             fee->addrp.addr,
6416                                             sizeof(fee->addrp.addr));
6417                                         lsa = (struct sockaddr *)&sin6;
6418                                 }
6419                                 break;
6420 #endif
6421                         default:
6422                                 break;
6423                         }
6424                         if (lsa) {
6425                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6426                         }
6427                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6428                         stcb->asoc.peer_supports_nat = 1;
6429                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6430                         /* Peer supports pr-sctp */
6431                         peer_supports_prsctp = 1;
6432                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6433                         /* A supported extension chunk */
6434                         struct sctp_supported_chunk_types_param *pr_supported;
6435                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6436                         int num_ent, i;
6437
6438                         phdr = sctp_get_next_param(m, offset,
6439                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6440                         if (phdr == NULL) {
6441                                 return (-25);
6442                         }
6443                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6444                         num_ent = plen - sizeof(struct sctp_paramhdr);
6445                         for (i = 0; i < num_ent; i++) {
6446                                 switch (pr_supported->chunk_types[i]) {
6447                                 case SCTP_ASCONF:
6448                                         peer_supports_asconf = 1;
6449                                         break;
6450                                 case SCTP_ASCONF_ACK:
6451                                         peer_supports_asconf_ack = 1;
6452                                         break;
6453                                 case SCTP_FORWARD_CUM_TSN:
6454                                         peer_supports_prsctp = 1;
6455                                         break;
6456                                 case SCTP_PACKET_DROPPED:
6457                                         peer_supports_pktdrop = 1;
6458                                         break;
6459                                 case SCTP_NR_SELECTIVE_ACK:
6460                                         peer_supports_nrsack = 1;
6461                                         break;
6462                                 case SCTP_STREAM_RESET:
6463                                         peer_supports_reconfig = 1;
6464                                         break;
6465                                 case SCTP_AUTHENTICATION:
6466                                         peer_supports_auth = 1;
6467                                         break;
6468                                 case SCTP_IDATA:
6469                                         peer_supports_idata = 1;
6470                                         break;
6471                                 default:
6472                                         /* one I have not learned yet */
6473                                         break;
6474
6475                                 }
6476                         }
6477                 } else if (ptype == SCTP_RANDOM) {
6478                         if (plen > sizeof(random_store))
6479                                 break;
6480                         if (got_random) {
6481                                 /* already processed a RANDOM */
6482                                 goto next_param;
6483                         }
6484                         phdr = sctp_get_next_param(m, offset,
6485                             (struct sctp_paramhdr *)random_store,
6486                             min(sizeof(random_store), plen));
6487                         if (phdr == NULL)
6488                                 return (-26);
6489                         p_random = (struct sctp_auth_random *)phdr;
6490                         random_len = plen - sizeof(*p_random);
6491                         /* enforce the random length */
6492                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6493                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6494                                 return (-27);
6495                         }
6496                         got_random = 1;
6497                 } else if (ptype == SCTP_HMAC_LIST) {
6498                         uint16_t num_hmacs;
6499                         uint16_t i;
6500
6501                         if (plen > sizeof(hmacs_store))
6502                                 break;
6503                         if (got_hmacs) {
6504                                 /* already processed a HMAC list */
6505                                 goto next_param;
6506                         }
6507                         phdr = sctp_get_next_param(m, offset,
6508                             (struct sctp_paramhdr *)hmacs_store,
6509                             min(plen, sizeof(hmacs_store)));
6510                         if (phdr == NULL)
6511                                 return (-28);
6512                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6513                         hmacs_len = plen - sizeof(*hmacs);
6514                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6515                         /* validate the hmac list */
6516                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6517                                 return (-29);
6518                         }
6519                         if (stcb->asoc.peer_hmacs != NULL)
6520                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6521                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6522                         if (stcb->asoc.peer_hmacs != NULL) {
6523                                 for (i = 0; i < num_hmacs; i++) {
6524                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6525                                             ntohs(hmacs->hmac_ids[i]));
6526                                 }
6527                         }
6528                         got_hmacs = 1;
6529                 } else if (ptype == SCTP_CHUNK_LIST) {
6530                         int i;
6531
6532                         if (plen > sizeof(chunks_store))
6533                                 break;
6534                         if (got_chklist) {
6535                                 /* already processed a Chunks list */
6536                                 goto next_param;
6537                         }
6538                         phdr = sctp_get_next_param(m, offset,
6539                             (struct sctp_paramhdr *)chunks_store,
6540                             min(plen, sizeof(chunks_store)));
6541                         if (phdr == NULL)
6542                                 return (-30);
6543                         chunks = (struct sctp_auth_chunk_list *)phdr;
6544                         num_chunks = plen - sizeof(*chunks);
6545                         if (stcb->asoc.peer_auth_chunks != NULL)
6546                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6547                         else
6548                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6549                         for (i = 0; i < num_chunks; i++) {
6550                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6551                                     stcb->asoc.peer_auth_chunks);
6552                                 /* record asconf/asconf-ack if listed */
6553                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6554                                         saw_asconf = 1;
6555                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6556                                         saw_asconf_ack = 1;
6557
6558                         }
6559                         got_chklist = 1;
6560                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6561                             (ptype == SCTP_STATE_COOKIE) ||
6562                             (ptype == SCTP_UNRECOG_PARAM) ||
6563                             (ptype == SCTP_COOKIE_PRESERVE) ||
6564                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6565                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6566                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6567                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6568                     (ptype == SCTP_SUCCESS_REPORT)) {
6569                          /* don't care */ ;
6570                 } else {
6571                         if ((ptype & 0x8000) == 0x0000) {
6572                                 /*
6573                                  * must stop processing the rest of the
6574                                  * param's. Any report bits were handled
6575                                  * with the call to
6576                                  * sctp_arethere_unrecognized_parameters()
6577                                  * when the INIT or INIT-ACK was first seen.
6578                                  */
6579                                 break;
6580                         }
6581                 }
6582
6583 next_param:
6584                 offset += SCTP_SIZE32(plen);
6585                 if (offset >= limit) {
6586                         break;
6587                 }
6588                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6589                     sizeof(parm_buf));
6590         }
6591         /* Now check to see if we need to purge any addresses */
6592         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6593                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6594                     SCTP_ADDR_NOT_IN_ASSOC) {
6595                         /* This address has been removed from the asoc */
6596                         /* remove and free it */
6597                         stcb->asoc.numnets--;
6598                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6599                         sctp_free_remote_addr(net);
6600                         if (net == stcb->asoc.primary_destination) {
6601                                 stcb->asoc.primary_destination = NULL;
6602                                 sctp_select_primary_destination(stcb);
6603                         }
6604                 }
6605         }
6606         if ((stcb->asoc.ecn_supported == 1) &&
6607             (peer_supports_ecn == 0)) {
6608                 stcb->asoc.ecn_supported = 0;
6609         }
6610         if ((stcb->asoc.prsctp_supported == 1) &&
6611             (peer_supports_prsctp == 0)) {
6612                 stcb->asoc.prsctp_supported = 0;
6613         }
6614         if ((stcb->asoc.auth_supported == 1) &&
6615             ((peer_supports_auth == 0) ||
6616             (got_random == 0) || (got_hmacs == 0))) {
6617                 stcb->asoc.auth_supported = 0;
6618         }
6619         if ((stcb->asoc.asconf_supported == 1) &&
6620             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6621             (stcb->asoc.auth_supported == 0) ||
6622             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6623                 stcb->asoc.asconf_supported = 0;
6624         }
6625         if ((stcb->asoc.reconfig_supported == 1) &&
6626             (peer_supports_reconfig == 0)) {
6627                 stcb->asoc.reconfig_supported = 0;
6628         }
6629         if ((stcb->asoc.idata_supported == 1) &&
6630             (peer_supports_idata == 0)) {
6631                 stcb->asoc.idata_supported = 0;
6632         }
6633         if ((stcb->asoc.nrsack_supported == 1) &&
6634             (peer_supports_nrsack == 0)) {
6635                 stcb->asoc.nrsack_supported = 0;
6636         }
6637         if ((stcb->asoc.pktdrop_supported == 1) &&
6638             (peer_supports_pktdrop == 0)) {
6639                 stcb->asoc.pktdrop_supported = 0;
6640         }
6641         /* validate authentication required parameters */
6642         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6643                 /* peer does not support auth but sent a chunks list? */
6644                 return (-31);
6645         }
6646         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6647                 /* peer supports asconf but not auth? */
6648                 return (-32);
6649         } else if ((peer_supports_asconf == 1) &&
6650                     (peer_supports_auth == 1) &&
6651             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6652                 return (-33);
6653         }
6654         /* concatenate the full random key */
6655         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6656         if (chunks != NULL) {
6657                 keylen += sizeof(*chunks) + num_chunks;
6658         }
6659         new_key = sctp_alloc_key(keylen);
6660         if (new_key != NULL) {
6661                 /* copy in the RANDOM */
6662                 if (p_random != NULL) {
6663                         keylen = sizeof(*p_random) + random_len;
6664                         bcopy(p_random, new_key->key, keylen);
6665                 }
6666                 /* append in the AUTH chunks */
6667                 if (chunks != NULL) {
6668                         bcopy(chunks, new_key->key + keylen,
6669                             sizeof(*chunks) + num_chunks);
6670                         keylen += sizeof(*chunks) + num_chunks;
6671                 }
6672                 /* append in the HMACs */
6673                 if (hmacs != NULL) {
6674                         bcopy(hmacs, new_key->key + keylen,
6675                             sizeof(*hmacs) + hmacs_len);
6676                 }
6677         } else {
6678                 /* failed to get memory for the key */
6679                 return (-34);
6680         }
6681         if (stcb->asoc.authinfo.peer_random != NULL)
6682                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6683         stcb->asoc.authinfo.peer_random = new_key;
6684         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6685         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6686
6687         return (0);
6688 }
6689
6690 int
6691 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6692     struct sctp_nets *net)
6693 {
6694         /* make sure the requested primary address exists in the assoc */
6695         if (net == NULL && sa)
6696                 net = sctp_findnet(stcb, sa);
6697
6698         if (net == NULL) {
6699                 /* didn't find the requested primary address! */
6700                 return (-1);
6701         } else {
6702                 /* set the primary address */
6703                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6704                         /* Must be confirmed, so queue to set */
6705                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6706                         return (0);
6707                 }
6708                 stcb->asoc.primary_destination = net;
6709                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6710                         sctp_free_remote_addr(stcb->asoc.alternate);
6711                         stcb->asoc.alternate = NULL;
6712                 }
6713                 net = TAILQ_FIRST(&stcb->asoc.nets);
6714                 if (net != stcb->asoc.primary_destination) {
6715                         /*
6716                          * first one on the list is NOT the primary
6717                          * sctp_cmpaddr() is much more efficient if the
6718                          * primary is the first on the list, make it so.
6719                          */
6720                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6721                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6722                 }
6723                 return (0);
6724         }
6725 }
6726
6727 int
6728 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6729 {
6730         /*
6731          * This function serves two purposes. It will see if a TAG can be
6732          * re-used and return 1 for yes it is ok and 0 for don't use that
6733          * tag. A secondary function it will do is purge out old tags that
6734          * can be removed.
6735          */
6736         struct sctpvtaghead *chain;
6737         struct sctp_tagblock *twait_block;
6738         struct sctpasochead *head;
6739         struct sctp_tcb *stcb;
6740         int i;
6741
6742         SCTP_INP_INFO_RLOCK();
6743         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6744             SCTP_BASE_INFO(hashasocmark))];
6745         LIST_FOREACH(stcb, head, sctp_asocs) {
6746                 /*
6747                  * We choose not to lock anything here. TCB's can't be
6748                  * removed since we have the read lock, so they can't be
6749                  * freed on us, same thing for the INP. I may be wrong with
6750                  * this assumption, but we will go with it for now :-)
6751                  */
6752                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6753                         continue;
6754                 }
6755                 if (stcb->asoc.my_vtag == tag) {
6756                         /* candidate */
6757                         if (stcb->rport != rport) {
6758                                 continue;
6759                         }
6760                         if (stcb->sctp_ep->sctp_lport != lport) {
6761                                 continue;
6762                         }
6763                         /* Its a used tag set */
6764                         SCTP_INP_INFO_RUNLOCK();
6765                         return (0);
6766                 }
6767         }
6768         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6769         /* Now what about timed wait ? */
6770         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6771                 /*
6772                  * Block(s) are present, lets see if we have this tag in the
6773                  * list
6774                  */
6775                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6776                         if (twait_block->vtag_block[i].v_tag == 0) {
6777                                 /* not used */
6778                                 continue;
6779                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6780                             now->tv_sec) {
6781                                 /* Audit expires this guy */
6782                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6783                                 twait_block->vtag_block[i].v_tag = 0;
6784                                 twait_block->vtag_block[i].lport = 0;
6785                                 twait_block->vtag_block[i].rport = 0;
6786                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6787                                     (twait_block->vtag_block[i].lport == lport) &&
6788                             (twait_block->vtag_block[i].rport == rport)) {
6789                                 /* Bad tag, sorry :< */
6790                                 SCTP_INP_INFO_RUNLOCK();
6791                                 return (0);
6792                         }
6793                 }
6794         }
6795         SCTP_INP_INFO_RUNLOCK();
6796         return (1);
6797 }
6798
6799 static void
6800 sctp_drain_mbufs(struct sctp_tcb *stcb)
6801 {
6802         /*
6803          * We must hunt this association for MBUF's past the cumack (i.e.
6804          * out of order data that we can renege on).
6805          */
6806         struct sctp_association *asoc;
6807         struct sctp_tmit_chunk *chk, *nchk;
6808         uint32_t cumulative_tsn_p1;
6809         struct sctp_queued_to_read *ctl, *nctl;
6810         int cnt, strmat;
6811         uint32_t gap, i;
6812         int fnd = 0;
6813
6814         /* We look for anything larger than the cum-ack + 1 */
6815
6816         asoc = &stcb->asoc;
6817         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6818                 /* none we can reneg on. */
6819                 return;
6820         }
6821         SCTP_STAT_INCR(sctps_protocol_drains_done);
6822         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6823         cnt = 0;
6824         /* Ok that was fun, now we will drain all the inbound streams? */
6825         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6826                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next_instrm, nctl) {
6827 #ifdef INVARIANTS
6828                         if (ctl->on_strm_q != SCTP_ON_ORDERED) {
6829                                 panic("Huh control: %p on_q: %d -- not ordered?",
6830                                     ctl, ctl->on_strm_q);
6831                         }
6832 #endif
6833                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6834                                 /* Yep it is above cum-ack */
6835                                 cnt++;
6836                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6837                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6838                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6839                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6840                                 if (ctl->on_read_q) {
6841                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, ctl, next);
6842                                         ctl->on_read_q = 0;
6843                                 }
6844                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next_instrm);
6845                                 ctl->on_strm_q = 0;
6846                                 if (ctl->data) {
6847                                         sctp_m_freem(ctl->data);
6848                                         ctl->data = NULL;
6849                                 }
6850                                 sctp_free_remote_addr(ctl->whoFrom);
6851                                 /* Now its reasm? */
6852                                 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) {
6853                                         cnt++;
6854                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6855                                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6856                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6857                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6858                                         TAILQ_REMOVE(&ctl->reasm, chk, sctp_next);
6859                                         if (chk->data) {
6860                                                 sctp_m_freem(chk->data);
6861                                                 chk->data = NULL;
6862                                         }
6863                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6864                                 }
6865                                 sctp_free_a_readq(stcb, ctl);
6866                         }
6867                 }
6868                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].uno_inqueue, next_instrm, nctl) {
6869 #ifdef INVARIANTS
6870                         if (ctl->on_strm_q != SCTP_ON_UNORDERED) {
6871                                 panic("Huh control: %p on_q: %d -- not unordered?",
6872                                     ctl, ctl->on_strm_q);
6873                         }
6874 #endif
6875                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6876                                 /* Yep it is above cum-ack */
6877                                 cnt++;
6878                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6879                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6880                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6881                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6882                                 if (ctl->on_read_q) {
6883                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, ctl, next);
6884                                         ctl->on_read_q = 0;
6885                                 }
6886                                 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, ctl, next_instrm);
6887                                 ctl->on_strm_q = 0;
6888                                 if (ctl->data) {
6889                                         sctp_m_freem(ctl->data);
6890                                         ctl->data = NULL;
6891                                 }
6892                                 sctp_free_remote_addr(ctl->whoFrom);
6893                                 /* Now its reasm? */
6894                                 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) {
6895                                         cnt++;
6896                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6897                                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6898                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6899                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6900                                         TAILQ_REMOVE(&ctl->reasm, chk, sctp_next);
6901                                         if (chk->data) {
6902                                                 sctp_m_freem(chk->data);
6903                                                 chk->data = NULL;
6904                                         }
6905                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6906                                 }
6907                                 sctp_free_a_readq(stcb, ctl);
6908                         }
6909                 }
6910         }
6911         if (cnt) {
6912                 /* We must back down to see what the new highest is */
6913                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6914                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6915                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6916                                 asoc->highest_tsn_inside_map = i;
6917                                 fnd = 1;
6918                                 break;
6919                         }
6920                 }
6921                 if (!fnd) {
6922                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6923                 }
6924                 /*
6925                  * Question, should we go through the delivery queue? The
6926                  * only reason things are on here is the app not reading OR
6927                  * a p-d-api up. An attacker COULD send enough in to
6928                  * initiate the PD-API and then send a bunch of stuff to
6929                  * other streams... these would wind up on the delivery
6930                  * queue.. and then we would not get to them. But in order
6931                  * to do this I then have to back-track and un-deliver
6932                  * sequence numbers in streams.. el-yucko. I think for now
6933                  * we will NOT look at the delivery queue and leave it to be
6934                  * something to consider later. An alternative would be to
6935                  * abort the P-D-API with a notification and then deliver
6936                  * the data.... Or another method might be to keep track of
6937                  * how many times the situation occurs and if we see a
6938                  * possible attack underway just abort the association.
6939                  */
6940 #ifdef SCTP_DEBUG
6941                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6942 #endif
6943                 /*
6944                  * Now do we need to find a new
6945                  * asoc->highest_tsn_inside_map?
6946                  */
6947                 asoc->last_revoke_count = cnt;
6948                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6949                 /* sa_ignore NO_NULL_CHK */
6950                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6951                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6952         }
6953         /*
6954          * Another issue, in un-setting the TSN's in the mapping array we
6955          * DID NOT adjust the highest_tsn marker.  This will cause one of
6956          * two things to occur. It may cause us to do extra work in checking
6957          * for our mapping array movement. More importantly it may cause us
6958          * to SACK every datagram. This may not be a bad thing though since
6959          * we will recover once we get our cum-ack above and all this stuff
6960          * we dumped recovered.
6961          */
6962 }
6963
6964 void
6965 sctp_drain()
6966 {
6967         /*
6968          * We must walk the PCB lists for ALL associations here. The system
6969          * is LOW on MBUF's and needs help. This is where reneging will
6970          * occur. We really hope this does NOT happen!
6971          */
6972         VNET_ITERATOR_DECL(vnet_iter);
6973         VNET_LIST_RLOCK_NOSLEEP();
6974         VNET_FOREACH(vnet_iter) {
6975                 CURVNET_SET(vnet_iter);
6976                 struct sctp_inpcb *inp;
6977                 struct sctp_tcb *stcb;
6978
6979                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6980                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6981 #ifdef VIMAGE
6982                         continue;
6983 #else
6984                         return;
6985 #endif
6986                 }
6987                 SCTP_INP_INFO_RLOCK();
6988                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6989                         /* For each endpoint */
6990                         SCTP_INP_RLOCK(inp);
6991                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6992                                 /* For each association */
6993                                 SCTP_TCB_LOCK(stcb);
6994                                 sctp_drain_mbufs(stcb);
6995                                 SCTP_TCB_UNLOCK(stcb);
6996                         }
6997                         SCTP_INP_RUNLOCK(inp);
6998                 }
6999                 SCTP_INP_INFO_RUNLOCK();
7000                 CURVNET_RESTORE();
7001         }
7002         VNET_LIST_RUNLOCK_NOSLEEP();
7003 }
7004
7005 /*
7006  * start a new iterator
7007  * iterates through all endpoints and associations based on the pcb_state
7008  * flags and asoc_state.  "af" (mandatory) is executed for all matching
7009  * assocs and "ef" (optional) is executed when the iterator completes.
7010  * "inpf" (optional) is executed for each new endpoint as it is being
7011  * iterated through. inpe (optional) is called when the inp completes
7012  * its way through all the stcbs.
7013  */
7014 int
7015 sctp_initiate_iterator(inp_func inpf,
7016     asoc_func af,
7017     inp_func inpe,
7018     uint32_t pcb_state,
7019     uint32_t pcb_features,
7020     uint32_t asoc_state,
7021     void *argp,
7022     uint32_t argi,
7023     end_func ef,
7024     struct sctp_inpcb *s_inp,
7025     uint8_t chunk_output_off)
7026 {
7027         struct sctp_iterator *it = NULL;
7028
7029         if (af == NULL) {
7030                 return (-1);
7031         }
7032         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7033                 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7034                     SCTP_BASE_VAR(sctp_pcb_initialized));
7035                 return (-1);
7036         }
7037         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7038             SCTP_M_ITER);
7039         if (it == NULL) {
7040                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7041                 return (ENOMEM);
7042         }
7043         memset(it, 0, sizeof(*it));
7044         it->function_assoc = af;
7045         it->function_inp = inpf;
7046         if (inpf)
7047                 it->done_current_ep = 0;
7048         else
7049                 it->done_current_ep = 1;
7050         it->function_atend = ef;
7051         it->pointer = argp;
7052         it->val = argi;
7053         it->pcb_flags = pcb_state;
7054         it->pcb_features = pcb_features;
7055         it->asoc_state = asoc_state;
7056         it->function_inp_end = inpe;
7057         it->no_chunk_output = chunk_output_off;
7058         it->vn = curvnet;
7059         if (s_inp) {
7060                 /* Assume lock is held here */
7061                 it->inp = s_inp;
7062                 SCTP_INP_INCR_REF(it->inp);
7063                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7064         } else {
7065                 SCTP_INP_INFO_RLOCK();
7066                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7067                 if (it->inp) {
7068                         SCTP_INP_INCR_REF(it->inp);
7069                 }
7070                 SCTP_INP_INFO_RUNLOCK();
7071                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7072
7073         }
7074         SCTP_IPI_ITERATOR_WQ_LOCK();
7075         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7076                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7077                 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7078                     SCTP_BASE_VAR(sctp_pcb_initialized), it);
7079                 SCTP_FREE(it, SCTP_M_ITER);
7080                 return (-1);
7081         }
7082         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7083         if (sctp_it_ctl.iterator_running == 0) {
7084                 sctp_wakeup_iterator();
7085         }
7086         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7087         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7088         return (0);
7089 }