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, param_buf;
2050 #if defined(INET) || defined(INET6)
2051         struct sctp_tcb *stcb;
2052         uint16_t ptype;
2053 #endif
2054         uint16_t plen;
2055 #ifdef INET
2056         struct sockaddr_in sin4;
2057 #endif
2058 #ifdef INET6
2059         struct sockaddr_in6 sin6;
2060 #endif
2061
2062 #ifdef INET
2063         memset(&sin4, 0, sizeof(sin4));
2064         sin4.sin_len = sizeof(sin4);
2065         sin4.sin_family = AF_INET;
2066         sin4.sin_port = sh->src_port;
2067 #endif
2068 #ifdef INET6
2069         memset(&sin6, 0, sizeof(sin6));
2070         sin6.sin6_len = sizeof(sin6);
2071         sin6.sin6_family = AF_INET6;
2072         sin6.sin6_port = sh->src_port;
2073 #endif
2074
2075         offset += sizeof(struct sctp_init_chunk);
2076
2077         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
2078         while (phdr != NULL) {
2079                 /* now we must see if we want the parameter */
2080 #if defined(INET) || defined(INET6)
2081                 ptype = ntohs(phdr->param_type);
2082 #endif
2083                 plen = ntohs(phdr->param_length);
2084                 if (plen == 0) {
2085                         break;
2086                 }
2087 #ifdef INET
2088                 if (ptype == SCTP_IPV4_ADDRESS &&
2089                     plen == sizeof(struct sctp_ipv4addr_param)) {
2090                         /* Get the rest of the address */
2091                         struct sctp_ipv4addr_param ip4_param, *p4;
2092
2093                         phdr = sctp_get_next_param(m, offset,
2094                             (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param));
2095                         if (phdr == NULL) {
2096                                 return (NULL);
2097                         }
2098                         p4 = (struct sctp_ipv4addr_param *)phdr;
2099                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2100                         /* look it up */
2101                         stcb = sctp_findassociation_ep_addr(inp_p,
2102                             (struct sockaddr *)&sin4, netp, dst, NULL);
2103                         if (stcb != NULL) {
2104                                 return (stcb);
2105                         }
2106                 }
2107 #endif
2108 #ifdef INET6
2109                 if (ptype == SCTP_IPV6_ADDRESS &&
2110                     plen == sizeof(struct sctp_ipv6addr_param)) {
2111                         /* Get the rest of the address */
2112                         struct sctp_ipv6addr_param ip6_param, *p6;
2113
2114                         phdr = sctp_get_next_param(m, offset,
2115                             (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param));
2116                         if (phdr == NULL) {
2117                                 return (NULL);
2118                         }
2119                         p6 = (struct sctp_ipv6addr_param *)phdr;
2120                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2121                         /* look it up */
2122                         stcb = sctp_findassociation_ep_addr(inp_p,
2123                             (struct sockaddr *)&sin6, netp, dst, NULL);
2124                         if (stcb != NULL) {
2125                                 return (stcb);
2126                         }
2127                 }
2128 #endif
2129                 offset += SCTP_SIZE32(plen);
2130                 phdr = sctp_get_next_param(m, offset, &param_buf,
2131                     sizeof(param_buf));
2132         }
2133         return (NULL);
2134 }
2135
2136 static struct sctp_tcb *
2137 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2138     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2139     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2140 {
2141         /*
2142          * Use my vtag to hash. If we find it we then verify the source addr
2143          * is in the assoc. If all goes well we save a bit on rec of a
2144          * packet.
2145          */
2146         struct sctpasochead *head;
2147         struct sctp_nets *net;
2148         struct sctp_tcb *stcb;
2149
2150         SCTP_INP_INFO_RLOCK();
2151         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2152             SCTP_BASE_INFO(hashasocmark))];
2153         LIST_FOREACH(stcb, head, sctp_asocs) {
2154                 SCTP_INP_RLOCK(stcb->sctp_ep);
2155                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2156                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2157                         continue;
2158                 }
2159                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2160                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2161                         continue;
2162                 }
2163                 SCTP_TCB_LOCK(stcb);
2164                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2165                 if (stcb->asoc.my_vtag == vtag) {
2166                         /* candidate */
2167                         if (stcb->rport != rport) {
2168                                 SCTP_TCB_UNLOCK(stcb);
2169                                 continue;
2170                         }
2171                         if (stcb->sctp_ep->sctp_lport != lport) {
2172                                 SCTP_TCB_UNLOCK(stcb);
2173                                 continue;
2174                         }
2175                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2176                                 SCTP_TCB_UNLOCK(stcb);
2177                                 continue;
2178                         }
2179                         /* RRS:Need toaddr check here */
2180                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2181                                 /* Endpoint does not own this address */
2182                                 SCTP_TCB_UNLOCK(stcb);
2183                                 continue;
2184                         }
2185                         if (remote_tag) {
2186                                 /*
2187                                  * If we have both vtags that's all we match
2188                                  * on
2189                                  */
2190                                 if (stcb->asoc.peer_vtag == remote_tag) {
2191                                         /*
2192                                          * If both tags match we consider it
2193                                          * conclusive and check NO
2194                                          * source/destination addresses
2195                                          */
2196                                         goto conclusive;
2197                                 }
2198                         }
2199                         if (skip_src_check) {
2200                 conclusive:
2201                                 if (from) {
2202                                         *netp = sctp_findnet(stcb, from);
2203                                 } else {
2204                                         *netp = NULL;   /* unknown */
2205                                 }
2206                                 if (inp_p)
2207                                         *inp_p = stcb->sctp_ep;
2208                                 SCTP_INP_INFO_RUNLOCK();
2209                                 return (stcb);
2210                         }
2211                         net = sctp_findnet(stcb, from);
2212                         if (net) {
2213                                 /* yep its him. */
2214                                 *netp = net;
2215                                 SCTP_STAT_INCR(sctps_vtagexpress);
2216                                 *inp_p = stcb->sctp_ep;
2217                                 SCTP_INP_INFO_RUNLOCK();
2218                                 return (stcb);
2219                         } else {
2220                                 /*
2221                                  * not him, this should only happen in rare
2222                                  * cases so I peg it.
2223                                  */
2224                                 SCTP_STAT_INCR(sctps_vtagbogus);
2225                         }
2226                 }
2227                 SCTP_TCB_UNLOCK(stcb);
2228         }
2229         SCTP_INP_INFO_RUNLOCK();
2230         return (NULL);
2231 }
2232
2233
2234 /*
2235  * Find an association with the pointer to the inbound IP packet. This can be
2236  * a IPv4 or IPv6 packet.
2237  */
2238 struct sctp_tcb *
2239 sctp_findassociation_addr(struct mbuf *m, int offset,
2240     struct sockaddr *src, struct sockaddr *dst,
2241     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2242     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2243 {
2244         struct sctp_tcb *stcb;
2245         struct sctp_inpcb *inp;
2246
2247         if (sh->v_tag) {
2248                 /* we only go down this path if vtag is non-zero */
2249                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2250                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2251                 if (stcb) {
2252                         return (stcb);
2253                 }
2254         }
2255         if (inp_p) {
2256                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2257                     1, vrf_id);
2258                 inp = *inp_p;
2259         } else {
2260                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2261                     1, vrf_id);
2262         }
2263         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2264         if (stcb == NULL && inp) {
2265                 /* Found a EP but not this address */
2266                 if ((ch->chunk_type == SCTP_INITIATION) ||
2267                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2268                         /*-
2269                          * special hook, we do NOT return linp or an
2270                          * association that is linked to an existing
2271                          * association that is under the TCP pool (i.e. no
2272                          * listener exists). The endpoint finding routine
2273                          * will always find a listener before examining the
2274                          * TCP pool.
2275                          */
2276                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2277                                 if (inp_p) {
2278                                         *inp_p = NULL;
2279                                 }
2280                                 return (NULL);
2281                         }
2282                         stcb = sctp_findassociation_special_addr(m,
2283                             offset, sh, &inp, netp, dst);
2284                         if (inp_p != NULL) {
2285                                 *inp_p = inp;
2286                         }
2287                 }
2288         }
2289         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2290         return (stcb);
2291 }
2292
2293 /*
2294  * lookup an association by an ASCONF lookup address.
2295  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2296  */
2297 struct sctp_tcb *
2298 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2299     struct sockaddr *dst, struct sctphdr *sh,
2300     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2301 {
2302         struct sctp_tcb *stcb;
2303         union sctp_sockstore remote_store;
2304         struct sctp_paramhdr param_buf, *phdr;
2305         int ptype;
2306         int zero_address = 0;
2307 #ifdef INET
2308         struct sockaddr_in *sin;
2309 #endif
2310 #ifdef INET6
2311         struct sockaddr_in6 *sin6;
2312 #endif
2313
2314         memset(&remote_store, 0, sizeof(remote_store));
2315         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2316             &param_buf, sizeof(struct sctp_paramhdr));
2317         if (phdr == NULL) {
2318                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2319                     __func__);
2320                 return NULL;
2321         }
2322         ptype = (int)((uint32_t)ntohs(phdr->param_type));
2323         /* get the correlation address */
2324         switch (ptype) {
2325 #ifdef INET6
2326         case SCTP_IPV6_ADDRESS:
2327                 {
2328                         /* ipv6 address param */
2329                         struct sctp_ipv6addr_param *p6, p6_buf;
2330
2331                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2332                                 return NULL;
2333                         }
2334                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2335                             offset + sizeof(struct sctp_asconf_chunk),
2336                             &p6_buf.ph, sizeof(p6_buf));
2337                         if (p6 == NULL) {
2338                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2339                                     __func__);
2340                                 return (NULL);
2341                         }
2342                         sin6 = &remote_store.sin6;
2343                         sin6->sin6_family = AF_INET6;
2344                         sin6->sin6_len = sizeof(*sin6);
2345                         sin6->sin6_port = sh->src_port;
2346                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2347                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2348                                 zero_address = 1;
2349                         break;
2350                 }
2351 #endif
2352 #ifdef INET
2353         case SCTP_IPV4_ADDRESS:
2354                 {
2355                         /* ipv4 address param */
2356                         struct sctp_ipv4addr_param *p4, p4_buf;
2357
2358                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2359                                 return NULL;
2360                         }
2361                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2362                             offset + sizeof(struct sctp_asconf_chunk),
2363                             &p4_buf.ph, sizeof(p4_buf));
2364                         if (p4 == NULL) {
2365                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2366                                     __func__);
2367                                 return (NULL);
2368                         }
2369                         sin = &remote_store.sin;
2370                         sin->sin_family = AF_INET;
2371                         sin->sin_len = sizeof(*sin);
2372                         sin->sin_port = sh->src_port;
2373                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2374                         if (sin->sin_addr.s_addr == INADDR_ANY)
2375                                 zero_address = 1;
2376                         break;
2377                 }
2378 #endif
2379         default:
2380                 /* invalid address param type */
2381                 return NULL;
2382         }
2383
2384         if (zero_address) {
2385                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2386                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2387                 if (stcb != NULL) {
2388                         SCTP_INP_DECR_REF(*inp_p);
2389                 }
2390         } else {
2391                 stcb = sctp_findassociation_ep_addr(inp_p,
2392                     &remote_store.sa, netp,
2393                     dst, NULL);
2394         }
2395         return (stcb);
2396 }
2397
2398
2399 /*
2400  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2401  * addresses. This way if we don't get a bind we by default pick a ephemeral
2402  * port with all addresses bound.
2403  */
2404 int
2405 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2406 {
2407         /*
2408          * we get called when a new endpoint starts up. We need to allocate
2409          * the sctp_inpcb structure from the zone and init it. Mark it as
2410          * unbound and find a port that we can use as an ephemeral with
2411          * INADDR_ANY. If the user binds later no problem we can then add in
2412          * the specific addresses. And setup the default parameters for the
2413          * EP.
2414          */
2415         int i, error;
2416         struct sctp_inpcb *inp;
2417         struct sctp_pcb *m;
2418         struct timeval time;
2419         sctp_sharedkey_t *null_key;
2420
2421         error = 0;
2422
2423         SCTP_INP_INFO_WLOCK();
2424         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2425         if (inp == NULL) {
2426                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2427                 SCTP_INP_INFO_WUNLOCK();
2428                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2429                 return (ENOBUFS);
2430         }
2431         /* zap it */
2432         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         net->src_addr_selected = 0;
3937         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3938                 /* Get source address */
3939                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3940                     stcb,
3941                     (sctp_route_t *)&net->ro,
3942                     net,
3943                     0,
3944                     stcb->asoc.vrf_id);
3945                 if (net->ro._s_addr != NULL) {
3946                         uint32_t imtu, rmtu, hcmtu;
3947
3948                         net->src_addr_selected = 1;
3949                         /* Now get the interface MTU */
3950                         if (net->ro._s_addr->ifn_p != NULL) {
3951                                 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3952                         } else {
3953                                 imtu = 0;
3954                         }
3955                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3956                         hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum);
3957                         net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu);
3958                         if (rmtu == 0) {
3959                                 /*
3960                                  * Start things off to match mtu of
3961                                  * interface please.
3962                                  */
3963                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3964                                     net->ro.ro_rt, net->mtu);
3965                         }
3966                 }
3967         }
3968         if (net->mtu == 0) {
3969                 switch (newaddr->sa_family) {
3970 #ifdef INET
3971                 case AF_INET:
3972                         net->mtu = SCTP_DEFAULT_MTU;
3973                         break;
3974 #endif
3975 #ifdef INET6
3976                 case AF_INET6:
3977                         net->mtu = 1280;
3978                         break;
3979 #endif
3980                 default:
3981                         break;
3982                 }
3983         }
3984 #if defined(INET) || defined(INET6)
3985         if (net->port) {
3986                 net->mtu -= (uint32_t)sizeof(struct udphdr);
3987         }
3988 #endif
3989         if (from == SCTP_ALLOC_ASOC) {
3990                 stcb->asoc.smallest_mtu = net->mtu;
3991         }
3992         if (stcb->asoc.smallest_mtu > net->mtu) {
3993                 sctp_pathmtu_adjustment(stcb, net->mtu);
3994         }
3995 #ifdef INET6
3996         if (newaddr->sa_family == AF_INET6) {
3997                 struct sockaddr_in6 *sin6;
3998
3999                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4000                 (void)sa6_recoverscope(sin6);
4001         }
4002 #endif
4003
4004         /* JRS - Use the congestion control given in the CC module */
4005         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4006                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4007
4008         /*
4009          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4010          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4011          */
4012         net->find_pseudo_cumack = 1;
4013         net->find_rtx_pseudo_cumack = 1;
4014         /* Choose an initial flowid. */
4015         net->flowid = stcb->asoc.my_vtag ^
4016             ntohs(stcb->rport) ^
4017             ntohs(stcb->sctp_ep->sctp_lport);
4018         net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4019         if (netp) {
4020                 *netp = net;
4021         }
4022         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4023         if (net->ro.ro_rt == NULL) {
4024                 /* Since we have no route put it at the back */
4025                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4026         } else if (netfirst == NULL) {
4027                 /* We are the first one in the pool. */
4028                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4029         } else if (netfirst->ro.ro_rt == NULL) {
4030                 /*
4031                  * First one has NO route. Place this one ahead of the first
4032                  * one.
4033                  */
4034                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4035         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4036                 /*
4037                  * This one has a different interface than the one at the
4038                  * top of the list. Place it ahead.
4039                  */
4040                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4041         } else {
4042                 /*
4043                  * Ok we have the same interface as the first one. Move
4044                  * forward until we find either a) one with a NULL route...
4045                  * insert ahead of that b) one with a different ifp.. insert
4046                  * after that. c) end of the list.. insert at the tail.
4047                  */
4048                 struct sctp_nets *netlook;
4049
4050                 do {
4051                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4052                         if (netlook == NULL) {
4053                                 /* End of the list */
4054                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4055                                 break;
4056                         } else if (netlook->ro.ro_rt == NULL) {
4057                                 /* next one has NO route */
4058                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4059                                 break;
4060                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4061                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4062                                     net, sctp_next);
4063                                 break;
4064                         }
4065                         /* Shift forward */
4066                         netfirst = netlook;
4067                 } while (netlook != NULL);
4068         }
4069
4070         /* got to have a primary set */
4071         if (stcb->asoc.primary_destination == 0) {
4072                 stcb->asoc.primary_destination = net;
4073         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4074                     (net->ro.ro_rt) &&
4075             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4076                 /* No route to current primary adopt new primary */
4077                 stcb->asoc.primary_destination = net;
4078         }
4079         /* Validate primary is first */
4080         net = TAILQ_FIRST(&stcb->asoc.nets);
4081         if ((net != stcb->asoc.primary_destination) &&
4082             (stcb->asoc.primary_destination)) {
4083                 /*
4084                  * first one on the list is NOT the primary sctp_cmpaddr()
4085                  * is much more efficient if the primary is the first on the
4086                  * list, make it so.
4087                  */
4088                 TAILQ_REMOVE(&stcb->asoc.nets,
4089                     stcb->asoc.primary_destination, sctp_next);
4090                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4091                     stcb->asoc.primary_destination, sctp_next);
4092         }
4093         return (0);
4094 }
4095
4096
4097 static uint32_t
4098 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4099 {
4100         uint32_t id;
4101         struct sctpasochead *head;
4102         struct sctp_tcb *lstcb;
4103
4104         SCTP_INP_WLOCK(inp);
4105 try_again:
4106         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4107                 /* TSNH */
4108                 SCTP_INP_WUNLOCK(inp);
4109                 return (0);
4110         }
4111         /*
4112          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4113          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4114          */
4115         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4116                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4117         }
4118         id = inp->sctp_associd_counter;
4119         inp->sctp_associd_counter++;
4120         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4121         if (lstcb) {
4122                 goto try_again;
4123         }
4124         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4125         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4126         stcb->asoc.in_asocid_hash = 1;
4127         SCTP_INP_WUNLOCK(inp);
4128         return id;
4129 }
4130
4131 /*
4132  * allocate an association and add it to the endpoint. The caller must be
4133  * careful to add all additional addresses once they are know right away or
4134  * else the assoc will be may experience a blackout scenario.
4135  */
4136 struct sctp_tcb *
4137 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4138     int *error, uint32_t override_tag, uint32_t vrf_id,
4139     uint16_t o_streams, uint16_t port,
4140     struct thread *p
4141 )
4142 {
4143         /* note the p argument is only valid in unbound sockets */
4144
4145         struct sctp_tcb *stcb;
4146         struct sctp_association *asoc;
4147         struct sctpasochead *head;
4148         uint16_t rport;
4149         int err;
4150
4151         /*
4152          * Assumption made here: Caller has done a
4153          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4154          * address does not exist already.
4155          */
4156         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4157                 /* Hit max assoc, sorry no more */
4158                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4159                 *error = ENOBUFS;
4160                 return (NULL);
4161         }
4162         if (firstaddr == NULL) {
4163                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4164                 *error = EINVAL;
4165                 return (NULL);
4166         }
4167         SCTP_INP_RLOCK(inp);
4168         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4169             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4170             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4171                 /*
4172                  * If its in the TCP pool, its NOT allowed to create an
4173                  * association. The parent listener needs to call
4174                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4175                  * off, or connected one does this.. its an error.
4176                  */
4177                 SCTP_INP_RUNLOCK(inp);
4178                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4179                 *error = EINVAL;
4180                 return (NULL);
4181         }
4182         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4183             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4184                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4185                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4186                         SCTP_INP_RUNLOCK(inp);
4187                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4188                         *error = EINVAL;
4189                         return (NULL);
4190                 }
4191         }
4192         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4193 #ifdef SCTP_DEBUG
4194         if (firstaddr) {
4195                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4196                 switch (firstaddr->sa_family) {
4197 #ifdef INET
4198                 case AF_INET:
4199                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4200                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4201                         break;
4202 #endif
4203 #ifdef INET6
4204                 case AF_INET6:
4205                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4206                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4207                         break;
4208 #endif
4209                 default:
4210                         break;
4211                 }
4212         } else {
4213                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4214         }
4215 #endif                          /* SCTP_DEBUG */
4216         switch (firstaddr->sa_family) {
4217 #ifdef INET
4218         case AF_INET:
4219                 {
4220                         struct sockaddr_in *sin;
4221
4222                         sin = (struct sockaddr_in *)firstaddr;
4223                         if ((ntohs(sin->sin_port) == 0) ||
4224                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4225                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4226                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4227                                 /* Invalid address */
4228                                 SCTP_INP_RUNLOCK(inp);
4229                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4230                                 *error = EINVAL;
4231                                 return (NULL);
4232                         }
4233                         rport = sin->sin_port;
4234                         break;
4235                 }
4236 #endif
4237 #ifdef INET6
4238         case AF_INET6:
4239                 {
4240                         struct sockaddr_in6 *sin6;
4241
4242                         sin6 = (struct sockaddr_in6 *)firstaddr;
4243                         if ((ntohs(sin6->sin6_port) == 0) ||
4244                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4245                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4246                                 /* Invalid address */
4247                                 SCTP_INP_RUNLOCK(inp);
4248                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4249                                 *error = EINVAL;
4250                                 return (NULL);
4251                         }
4252                         rport = sin6->sin6_port;
4253                         break;
4254                 }
4255 #endif
4256         default:
4257                 /* not supported family type */
4258                 SCTP_INP_RUNLOCK(inp);
4259                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4260                 *error = EINVAL;
4261                 return (NULL);
4262         }
4263         SCTP_INP_RUNLOCK(inp);
4264         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4265                 /*
4266                  * If you have not performed a bind, then we need to do the
4267                  * ephemeral bind for you.
4268                  */
4269                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4270                     (struct sockaddr *)NULL,
4271                     (struct sctp_ifa *)NULL,
4272                     p
4273                     ))) {
4274                         /* bind error, probably perm */
4275                         *error = err;
4276                         return (NULL);
4277                 }
4278         }
4279         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4280         if (stcb == NULL) {
4281                 /* out of memory? */
4282                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4283                 *error = ENOMEM;
4284                 return (NULL);
4285         }
4286         SCTP_INCR_ASOC_COUNT();
4287
4288         bzero(stcb, sizeof(*stcb));
4289         asoc = &stcb->asoc;
4290
4291         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4292         SCTP_TCB_LOCK_INIT(stcb);
4293         SCTP_TCB_SEND_LOCK_INIT(stcb);
4294         stcb->rport = rport;
4295         /* setup back pointer's */
4296         stcb->sctp_ep = inp;
4297         stcb->sctp_socket = inp->sctp_socket;
4298         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
4299                 /* failed */
4300                 SCTP_TCB_LOCK_DESTROY(stcb);
4301                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4302                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4303                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4304                 SCTP_DECR_ASOC_COUNT();
4305                 *error = err;
4306                 return (NULL);
4307         }
4308         /* and the port */
4309         SCTP_INP_INFO_WLOCK();
4310         SCTP_INP_WLOCK(inp);
4311         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4312                 /* inpcb freed while alloc going on */
4313                 SCTP_TCB_LOCK_DESTROY(stcb);
4314                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4315                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4316                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4317                 SCTP_INP_WUNLOCK(inp);
4318                 SCTP_INP_INFO_WUNLOCK();
4319                 SCTP_DECR_ASOC_COUNT();
4320                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4321                 *error = EINVAL;
4322                 return (NULL);
4323         }
4324         SCTP_TCB_LOCK(stcb);
4325
4326         /* now that my_vtag is set, add it to the hash */
4327         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4328         /* put it in the bucket in the vtag hash of assoc's for the system */
4329         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4330         SCTP_INP_INFO_WUNLOCK();
4331
4332         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4333                 /* failure.. memory error? */
4334                 if (asoc->strmout) {
4335                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4336                         asoc->strmout = NULL;
4337                 }
4338                 if (asoc->mapping_array) {
4339                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4340                         asoc->mapping_array = NULL;
4341                 }
4342                 if (asoc->nr_mapping_array) {
4343                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4344                         asoc->nr_mapping_array = NULL;
4345                 }
4346                 SCTP_DECR_ASOC_COUNT();
4347                 SCTP_TCB_UNLOCK(stcb);
4348                 SCTP_TCB_LOCK_DESTROY(stcb);
4349                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4350                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4351                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4352                 SCTP_INP_WUNLOCK(inp);
4353                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4354                 *error = ENOBUFS;
4355                 return (NULL);
4356         }
4357         /* Init all the timers */
4358         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4359         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4360         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4361         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4362         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4363         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4364         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4365
4366         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4367         /* now file the port under the hash as well */
4368         if (inp->sctp_tcbhash != NULL) {
4369                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4370                     inp->sctp_hashmark)];
4371                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4372         }
4373         SCTP_INP_WUNLOCK(inp);
4374         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4375         return (stcb);
4376 }
4377
4378
4379 void
4380 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4381 {
4382         struct sctp_association *asoc;
4383
4384         asoc = &stcb->asoc;
4385         asoc->numnets--;
4386         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4387         if (net == asoc->primary_destination) {
4388                 /* Reset primary */
4389                 struct sctp_nets *lnet;
4390
4391                 lnet = TAILQ_FIRST(&asoc->nets);
4392                 /*
4393                  * Mobility adaptation Ideally, if deleted destination is
4394                  * the primary, it becomes a fast retransmission trigger by
4395                  * the subsequent SET PRIMARY. (by micchie)
4396                  */
4397                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4398                     SCTP_MOBILITY_BASE) ||
4399                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4400                     SCTP_MOBILITY_FASTHANDOFF)) {
4401                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4402                         if (asoc->deleted_primary != NULL) {
4403                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4404                                 goto out;
4405                         }
4406                         asoc->deleted_primary = net;
4407                         atomic_add_int(&net->ref_count, 1);
4408                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4409                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4410                         sctp_mobility_feature_on(stcb->sctp_ep,
4411                             SCTP_MOBILITY_PRIM_DELETED);
4412                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4413                             stcb->sctp_ep, stcb, NULL);
4414                 }
4415 out:
4416                 /* Try to find a confirmed primary */
4417                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4418         }
4419         if (net == asoc->last_data_chunk_from) {
4420                 /* Reset primary */
4421                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4422         }
4423         if (net == asoc->last_control_chunk_from) {
4424                 /* Clear net */
4425                 asoc->last_control_chunk_from = NULL;
4426         }
4427         if (net == stcb->asoc.alternate) {
4428                 sctp_free_remote_addr(stcb->asoc.alternate);
4429                 stcb->asoc.alternate = NULL;
4430         }
4431         sctp_free_remote_addr(net);
4432 }
4433
4434 /*
4435  * remove a remote endpoint address from an association, it will fail if the
4436  * address does not exist.
4437  */
4438 int
4439 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4440 {
4441         /*
4442          * Here we need to remove a remote address. This is quite simple, we
4443          * first find it in the list of address for the association
4444          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4445          * on that item. Note we do not allow it to be removed if there are
4446          * no other addresses.
4447          */
4448         struct sctp_association *asoc;
4449         struct sctp_nets *net, *nnet;
4450
4451         asoc = &stcb->asoc;
4452
4453         /* locate the address */
4454         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4455                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4456                         continue;
4457                 }
4458                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4459                     remaddr)) {
4460                         /* we found the guy */
4461                         if (asoc->numnets < 2) {
4462                                 /* Must have at LEAST two remote addresses */
4463                                 return (-1);
4464                         } else {
4465                                 sctp_remove_net(stcb, net);
4466                                 return (0);
4467                         }
4468                 }
4469         }
4470         /* not found. */
4471         return (-2);
4472 }
4473
4474 void
4475 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4476 {
4477         struct sctpvtaghead *chain;
4478         struct sctp_tagblock *twait_block;
4479         int found = 0;
4480         int i;
4481
4482         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4483         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4484                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4485                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4486                             (twait_block->vtag_block[i].lport == lport) &&
4487                             (twait_block->vtag_block[i].rport == rport)) {
4488                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4489                                 twait_block->vtag_block[i].v_tag = 0;
4490                                 twait_block->vtag_block[i].lport = 0;
4491                                 twait_block->vtag_block[i].rport = 0;
4492                                 found = 1;
4493                                 break;
4494                         }
4495                 }
4496                 if (found)
4497                         break;
4498         }
4499 }
4500
4501 int
4502 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4503 {
4504         struct sctpvtaghead *chain;
4505         struct sctp_tagblock *twait_block;
4506         int found = 0;
4507         int i;
4508
4509         SCTP_INP_INFO_WLOCK();
4510         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4511         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4512                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4513                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4514                             (twait_block->vtag_block[i].lport == lport) &&
4515                             (twait_block->vtag_block[i].rport == rport)) {
4516                                 found = 1;
4517                                 break;
4518                         }
4519                 }
4520                 if (found)
4521                         break;
4522         }
4523         SCTP_INP_INFO_WUNLOCK();
4524         return (found);
4525 }
4526
4527
4528 void
4529 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4530 {
4531         struct sctpvtaghead *chain;
4532         struct sctp_tagblock *twait_block;
4533         struct timeval now;
4534         int set, i;
4535
4536         if (time == 0) {
4537                 /* Its disabled */
4538                 return;
4539         }
4540         (void)SCTP_GETTIME_TIMEVAL(&now);
4541         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4542         set = 0;
4543         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4544                 /* Block(s) present, lets find space, and expire on the fly */
4545                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4546                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4547                             !set) {
4548                                 twait_block->vtag_block[i].tv_sec_at_expire =
4549                                     now.tv_sec + time;
4550                                 twait_block->vtag_block[i].v_tag = tag;
4551                                 twait_block->vtag_block[i].lport = lport;
4552                                 twait_block->vtag_block[i].rport = rport;
4553                                 set = 1;
4554                         } else if ((twait_block->vtag_block[i].v_tag) &&
4555                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4556                                 /* Audit expires this guy */
4557                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4558                                 twait_block->vtag_block[i].v_tag = 0;
4559                                 twait_block->vtag_block[i].lport = 0;
4560                                 twait_block->vtag_block[i].rport = 0;
4561                                 if (set == 0) {
4562                                         /* Reuse it for my new tag */
4563                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4564                                         twait_block->vtag_block[i].v_tag = tag;
4565                                         twait_block->vtag_block[i].lport = lport;
4566                                         twait_block->vtag_block[i].rport = rport;
4567                                         set = 1;
4568                                 }
4569                         }
4570                 }
4571                 if (set) {
4572                         /*
4573                          * We only do up to the block where we can place our
4574                          * tag for audits
4575                          */
4576                         break;
4577                 }
4578         }
4579         /* Need to add a new block to chain */
4580         if (!set) {
4581                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4582                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4583                 if (twait_block == NULL) {
4584 #ifdef INVARIANTS
4585                         panic("Can not alloc tagblock");
4586 #endif
4587                         return;
4588                 }
4589                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4590                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4591                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4592                 twait_block->vtag_block[0].v_tag = tag;
4593                 twait_block->vtag_block[0].lport = lport;
4594                 twait_block->vtag_block[0].rport = rport;
4595         }
4596 }
4597
4598 void
4599 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4600 {
4601         struct sctp_tmit_chunk *chk, *nchk;
4602         struct sctp_queued_to_read *control, *ncontrol;
4603
4604         TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) {
4605                 TAILQ_REMOVE(rh, control, next_instrm);
4606                 control->on_strm_q = 0;
4607                 if (control->on_read_q == 0) {
4608                         sctp_free_remote_addr(control->whoFrom);
4609                         if (control->data) {
4610                                 sctp_m_freem(control->data);
4611                                 control->data = NULL;
4612                         }
4613                 }
4614                 /* Reassembly free? */
4615                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
4616                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
4617                         if (chk->data) {
4618                                 sctp_m_freem(chk->data);
4619                                 chk->data = NULL;
4620                         }
4621                         if (chk->holds_key_ref)
4622                                 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4623                         sctp_free_remote_addr(chk->whoTo);
4624                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4625                         SCTP_DECR_CHK_COUNT();
4626                         /* sa_ignore FREED_MEMORY */
4627                 }
4628                 /*
4629                  * We don't free the address here since all the net's were
4630                  * freed above.
4631                  */
4632                 if (control->on_read_q == 0) {
4633                         sctp_free_a_readq(stcb, control);
4634                 }
4635         }
4636 }
4637
4638
4639 /*-
4640  * Free the association after un-hashing the remote port. This
4641  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4642  * expect that the input to this function IS a locked TCB.
4643  * It will return 0, if it did NOT destroy the association (instead
4644  * it unlocks it. It will return NON-zero if it either destroyed the
4645  * association OR the association is already destroyed.
4646  */
4647 int
4648 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4649 {
4650         int i;
4651         struct sctp_association *asoc;
4652         struct sctp_nets *net, *nnet;
4653         struct sctp_laddr *laddr, *naddr;
4654         struct sctp_tmit_chunk *chk, *nchk;
4655         struct sctp_asconf_addr *aparam, *naparam;
4656         struct sctp_asconf_ack *aack, *naack;
4657         struct sctp_stream_reset_list *strrst, *nstrrst;
4658         struct sctp_queued_to_read *sq, *nsq;
4659         struct sctp_stream_queue_pending *sp, *nsp;
4660         sctp_sharedkey_t *shared_key, *nshared_key;
4661         struct socket *so;
4662
4663         /* first, lets purge the entry from the hash table. */
4664
4665 #ifdef SCTP_LOG_CLOSING
4666         sctp_log_closing(inp, stcb, 6);
4667 #endif
4668         if (stcb->asoc.state == 0) {
4669 #ifdef SCTP_LOG_CLOSING
4670                 sctp_log_closing(inp, NULL, 7);
4671 #endif
4672                 /* there is no asoc, really TSNH :-0 */
4673                 return (1);
4674         }
4675         if (stcb->asoc.alternate) {
4676                 sctp_free_remote_addr(stcb->asoc.alternate);
4677                 stcb->asoc.alternate = NULL;
4678         }
4679         /* TEMP CODE */
4680         if (stcb->freed_from_where == 0) {
4681                 /* Only record the first place free happened from */
4682                 stcb->freed_from_where = from_location;
4683         }
4684         /* TEMP CODE */
4685
4686         asoc = &stcb->asoc;
4687         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4688             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4689                 /* nothing around */
4690                 so = NULL;
4691         else
4692                 so = inp->sctp_socket;
4693
4694         /*
4695          * We used timer based freeing if a reader or writer is in the way.
4696          * So we first check if we are actually being called from a timer,
4697          * if so we abort early if a reader or writer is still in the way.
4698          */
4699         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4700             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4701                 /*
4702                  * is it the timer driving us? if so are the reader/writers
4703                  * gone?
4704                  */
4705                 if (stcb->asoc.refcnt) {
4706                         /* nope, reader or writer in the way */
4707                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4708                         /* no asoc destroyed */
4709                         SCTP_TCB_UNLOCK(stcb);
4710 #ifdef SCTP_LOG_CLOSING
4711                         sctp_log_closing(inp, stcb, 8);
4712 #endif
4713                         return (0);
4714                 }
4715         }
4716         /* now clean up any other timers */
4717         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4718         asoc->dack_timer.self = NULL;
4719         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4720         /*-
4721          * For stream reset we don't blast this unless
4722          * it is a str-reset timer, it might be the
4723          * free-asoc timer which we DON'T want to
4724          * disturb.
4725          */
4726         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4727                 asoc->strreset_timer.self = NULL;
4728         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4729         asoc->asconf_timer.self = NULL;
4730         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4731         asoc->autoclose_timer.self = NULL;
4732         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4733         asoc->shut_guard_timer.self = NULL;
4734         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4735         asoc->delayed_event_timer.self = NULL;
4736         /* Mobility adaptation */
4737         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4738         asoc->delete_prim_timer.self = NULL;
4739         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4740                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4741                 net->rxt_timer.self = NULL;
4742                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4743                 net->pmtu_timer.self = NULL;
4744                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4745                 net->hb_timer.self = NULL;
4746         }
4747         /* Now the read queue needs to be cleaned up (only once) */
4748         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4749                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4750                 SCTP_INP_READ_LOCK(inp);
4751                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4752                         if (sq->stcb == stcb) {
4753                                 sq->do_not_ref_stcb = 1;
4754                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4755                                 /*
4756                                  * If there is no end, there never will be
4757                                  * now.
4758                                  */
4759                                 if (sq->end_added == 0) {
4760                                         /* Held for PD-API clear that. */
4761                                         sq->pdapi_aborted = 1;
4762                                         sq->held_length = 0;
4763                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4764                                                 /*
4765                                                  * Need to add a PD-API
4766                                                  * aborted indication.
4767                                                  * Setting the control_pdapi
4768                                                  * assures that it will be
4769                                                  * added right after this
4770                                                  * msg.
4771                                                  */
4772                                                 uint32_t strseq;
4773
4774                                                 stcb->asoc.control_pdapi = sq;
4775                                                 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff);
4776                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4777                                                     stcb,
4778                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4779                                                     (void *)&strseq,
4780                                                     SCTP_SO_LOCKED);
4781                                                 stcb->asoc.control_pdapi = NULL;
4782                                         }
4783                                 }
4784                                 /* Add an end to wake them */
4785                                 sq->end_added = 1;
4786                         }
4787                 }
4788                 SCTP_INP_READ_UNLOCK(inp);
4789                 if (stcb->block_entry) {
4790                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4791                         stcb->block_entry->error = ECONNRESET;
4792                         stcb->block_entry = NULL;
4793                 }
4794         }
4795         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4796                 /*
4797                  * Someone holds a reference OR the socket is unaccepted
4798                  * yet.
4799                  */
4800                 if ((stcb->asoc.refcnt) ||
4801                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4802                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4803                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4804                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4805                 }
4806                 SCTP_TCB_UNLOCK(stcb);
4807                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4808                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4809                         /* nothing around */
4810                         so = NULL;
4811                 if (so) {
4812                         /* Wake any reader/writers */
4813                         sctp_sorwakeup(inp, so);
4814                         sctp_sowwakeup(inp, so);
4815                 }
4816 #ifdef SCTP_LOG_CLOSING
4817                 sctp_log_closing(inp, stcb, 9);
4818 #endif
4819                 /* no asoc destroyed */
4820                 return (0);
4821         }
4822 #ifdef SCTP_LOG_CLOSING
4823         sctp_log_closing(inp, stcb, 10);
4824 #endif
4825         /*
4826          * When I reach here, no others want to kill the assoc yet.. and I
4827          * own the lock. Now its possible an abort comes in when I do the
4828          * lock exchange below to grab all the locks to do the final take
4829          * out. to prevent this we increment the count, which will start a
4830          * timer and blow out above thus assuring us that we hold exclusive
4831          * killing of the asoc. Note that after getting back the TCB lock we
4832          * will go ahead and increment the counter back up and stop any
4833          * timer a passing stranger may have started :-S
4834          */
4835         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4836                 atomic_add_int(&stcb->asoc.refcnt, 1);
4837
4838                 SCTP_TCB_UNLOCK(stcb);
4839                 SCTP_INP_INFO_WLOCK();
4840                 SCTP_INP_WLOCK(inp);
4841                 SCTP_TCB_LOCK(stcb);
4842         }
4843         /* Double check the GONE flag */
4844         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4845             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4846                 /* nothing around */
4847                 so = NULL;
4848
4849         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4850             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4851                 /*
4852                  * For TCP type we need special handling when we are
4853                  * connected. We also include the peel'ed off ones to.
4854                  */
4855                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4856                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4857                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4858                         if (so) {
4859                                 SOCK_LOCK(so);
4860                                 if (so->so_rcv.sb_cc == 0) {
4861                                         so->so_state &= ~(SS_ISCONNECTING |
4862                                             SS_ISDISCONNECTING |
4863                                             SS_ISCONFIRMING |
4864                                             SS_ISCONNECTED);
4865                                 }
4866                                 socantrcvmore_locked(so);
4867                                 socantsendmore(so);
4868                                 sctp_sowwakeup(inp, so);
4869                                 sctp_sorwakeup(inp, so);
4870                                 SCTP_SOWAKEUP(so);
4871                         }
4872                 }
4873         }
4874         /*
4875          * Make it invalid too, that way if its about to run it will abort
4876          * and return.
4877          */
4878         /* re-increment the lock */
4879         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4880                 atomic_add_int(&stcb->asoc.refcnt, -1);
4881         }
4882         if (stcb->asoc.refcnt) {
4883                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4884                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4885                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4886                         SCTP_INP_INFO_WUNLOCK();
4887                         SCTP_INP_WUNLOCK(inp);
4888                 }
4889                 SCTP_TCB_UNLOCK(stcb);
4890                 return (0);
4891         }
4892         asoc->state = 0;
4893         if (inp->sctp_tcbhash) {
4894                 LIST_REMOVE(stcb, sctp_tcbhash);
4895         }
4896         if (stcb->asoc.in_asocid_hash) {
4897                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4898         }
4899         /* Now lets remove it from the list of ALL associations in the EP */
4900         LIST_REMOVE(stcb, sctp_tcblist);
4901         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4902                 SCTP_INP_INCR_REF(inp);
4903                 SCTP_INP_WUNLOCK(inp);
4904         }
4905         /* pull from vtag hash */
4906         LIST_REMOVE(stcb, sctp_asocs);
4907         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4908             inp->sctp_lport, stcb->rport);
4909
4910         /*
4911          * Now restop the timers to be sure this is paranoia at is finest!
4912          */
4913         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4914         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4915         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4916         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4917         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4918         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4919         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4920         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4921                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4922                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4923                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4924         }
4925
4926         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4927         /*
4928          * The chunk lists and such SHOULD be empty but we check them just
4929          * in case.
4930          */
4931         /* anything on the wheel needs to be removed */
4932         for (i = 0; i < asoc->streamoutcnt; i++) {
4933                 struct sctp_stream_out *outs;
4934
4935                 outs = &asoc->strmout[i];
4936                 /* now clean up any chunks here */
4937                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4938                         atomic_subtract_int(&asoc->stream_queue_cnt, 1);
4939                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4940                         stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 0);
4941                         sctp_free_spbufspace(stcb, asoc, sp);
4942                         if (sp->data) {
4943                                 if (so) {
4944                                         /* Still an open socket - report */
4945                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4946                                             0, (void *)sp, SCTP_SO_LOCKED);
4947                                 }
4948                                 if (sp->data) {
4949                                         sctp_m_freem(sp->data);
4950                                         sp->data = NULL;
4951                                         sp->tail_mbuf = NULL;
4952                                         sp->length = 0;
4953                                 }
4954                         }
4955                         if (sp->net) {
4956                                 sctp_free_remote_addr(sp->net);
4957                                 sp->net = NULL;
4958                         }
4959                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4960                 }
4961         }
4962         /* sa_ignore FREED_MEMORY */
4963         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4964                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4965                 SCTP_FREE(strrst, SCTP_M_STRESET);
4966         }
4967         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4968                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4969                 if (sq->data) {
4970                         sctp_m_freem(sq->data);
4971                         sq->data = NULL;
4972                 }
4973                 sctp_free_remote_addr(sq->whoFrom);
4974                 sq->whoFrom = NULL;
4975                 sq->stcb = NULL;
4976                 /* Free the ctl entry */
4977                 sctp_free_a_readq(stcb, sq);
4978                 /* sa_ignore FREED_MEMORY */
4979         }
4980         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4981                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4982                 if (chk->data) {
4983                         sctp_m_freem(chk->data);
4984                         chk->data = NULL;
4985                 }
4986                 if (chk->holds_key_ref)
4987                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4988                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4989                 SCTP_DECR_CHK_COUNT();
4990                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4991                 asoc->free_chunk_cnt--;
4992                 /* sa_ignore FREED_MEMORY */
4993         }
4994         /* pending send queue SHOULD be empty */
4995         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4996                 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
4997                         asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
4998 #ifdef INVARIANTS
4999                 } else {
5000                         panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5001 #endif
5002                 }
5003                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5004                 if (chk->data) {
5005                         if (so) {
5006                                 /* Still a socket? */
5007                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5008                                     0, chk, SCTP_SO_LOCKED);
5009                         }
5010                         if (chk->data) {
5011                                 sctp_m_freem(chk->data);
5012                                 chk->data = NULL;
5013                         }
5014                 }
5015                 if (chk->holds_key_ref)
5016                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5017                 if (chk->whoTo) {
5018                         sctp_free_remote_addr(chk->whoTo);
5019                         chk->whoTo = NULL;
5020                 }
5021                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5022                 SCTP_DECR_CHK_COUNT();
5023                 /* sa_ignore FREED_MEMORY */
5024         }
5025         /* sent queue SHOULD be empty */
5026         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5027                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5028                         if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5029                                 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5030 #ifdef INVARIANTS
5031                         } else {
5032                                 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5033 #endif
5034                         }
5035                 }
5036                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5037                 if (chk->data) {
5038                         if (so) {
5039                                 /* Still a socket? */
5040                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5041                                     0, chk, SCTP_SO_LOCKED);
5042                         }
5043                         if (chk->data) {
5044                                 sctp_m_freem(chk->data);
5045                                 chk->data = NULL;
5046                         }
5047                 }
5048                 if (chk->holds_key_ref)
5049                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5050                 sctp_free_remote_addr(chk->whoTo);
5051                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5052                 SCTP_DECR_CHK_COUNT();
5053                 /* sa_ignore FREED_MEMORY */
5054         }
5055 #ifdef INVARIANTS
5056         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5057                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5058                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5059                 }
5060         }
5061 #endif
5062         /* control queue MAY not be empty */
5063         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5064                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5065                 if (chk->data) {
5066                         sctp_m_freem(chk->data);
5067                         chk->data = NULL;
5068                 }
5069                 if (chk->holds_key_ref)
5070                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5071                 sctp_free_remote_addr(chk->whoTo);
5072                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5073                 SCTP_DECR_CHK_COUNT();
5074                 /* sa_ignore FREED_MEMORY */
5075         }
5076         /* ASCONF queue MAY not be empty */
5077         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5078                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5079                 if (chk->data) {
5080                         sctp_m_freem(chk->data);
5081                         chk->data = NULL;
5082                 }
5083                 if (chk->holds_key_ref)
5084                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5085                 sctp_free_remote_addr(chk->whoTo);
5086                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5087                 SCTP_DECR_CHK_COUNT();
5088                 /* sa_ignore FREED_MEMORY */
5089         }
5090         if (asoc->mapping_array) {
5091                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5092                 asoc->mapping_array = NULL;
5093         }
5094         if (asoc->nr_mapping_array) {
5095                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5096                 asoc->nr_mapping_array = NULL;
5097         }
5098         /* the stream outs */
5099         if (asoc->strmout) {
5100                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5101                 asoc->strmout = NULL;
5102         }
5103         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5104         if (asoc->strmin) {
5105                 for (i = 0; i < asoc->streamincnt; i++) {
5106                         sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5107                         sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5108                 }
5109                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5110                 asoc->strmin = NULL;
5111         }
5112         asoc->streamincnt = 0;
5113         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5114 #ifdef INVARIANTS
5115                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5116                         panic("no net's left alloc'ed, or list points to itself");
5117                 }
5118 #endif
5119                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5120                 sctp_free_remote_addr(net);
5121         }
5122         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5123                 /* sa_ignore FREED_MEMORY */
5124                 sctp_remove_laddr(laddr);
5125         }
5126
5127         /* pending asconf (address) parameters */
5128         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5129                 /* sa_ignore FREED_MEMORY */
5130                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5131                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5132         }
5133         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5134                 /* sa_ignore FREED_MEMORY */
5135                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5136                 if (aack->data != NULL) {
5137                         sctp_m_freem(aack->data);
5138                 }
5139                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5140         }
5141         /* clean up auth stuff */
5142         if (asoc->local_hmacs)
5143                 sctp_free_hmaclist(asoc->local_hmacs);
5144         if (asoc->peer_hmacs)
5145                 sctp_free_hmaclist(asoc->peer_hmacs);
5146
5147         if (asoc->local_auth_chunks)
5148                 sctp_free_chunklist(asoc->local_auth_chunks);
5149         if (asoc->peer_auth_chunks)
5150                 sctp_free_chunklist(asoc->peer_auth_chunks);
5151
5152         sctp_free_authinfo(&asoc->authinfo);
5153
5154         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5155                 LIST_REMOVE(shared_key, next);
5156                 sctp_free_sharedkey(shared_key);
5157                 /* sa_ignore FREED_MEMORY */
5158         }
5159
5160         /* Insert new items here :> */
5161
5162         /* Get rid of LOCK */
5163         SCTP_TCB_UNLOCK(stcb);
5164         SCTP_TCB_LOCK_DESTROY(stcb);
5165         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5166         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5167                 SCTP_INP_INFO_WUNLOCK();
5168                 SCTP_INP_RLOCK(inp);
5169         }
5170 #ifdef SCTP_TRACK_FREED_ASOCS
5171         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5172                 /* now clean up the tasoc itself */
5173                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5174                 SCTP_DECR_ASOC_COUNT();
5175         } else {
5176                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5177         }
5178 #else
5179         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5180         SCTP_DECR_ASOC_COUNT();
5181 #endif
5182         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5183                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5184                         /*
5185                          * If its NOT the inp_free calling us AND sctp_close
5186                          * as been called, we call back...
5187                          */
5188                         SCTP_INP_RUNLOCK(inp);
5189                         /*
5190                          * This will start the kill timer (if we are the
5191                          * last one) since we hold an increment yet. But
5192                          * this is the only safe way to do this since
5193                          * otherwise if the socket closes at the same time
5194                          * we are here we might collide in the cleanup.
5195                          */
5196                         sctp_inpcb_free(inp,
5197                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5198                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5199                         SCTP_INP_DECR_REF(inp);
5200                         goto out_of;
5201                 } else {
5202                         /* The socket is still open. */
5203                         SCTP_INP_DECR_REF(inp);
5204                 }
5205         }
5206         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5207                 SCTP_INP_RUNLOCK(inp);
5208         }
5209 out_of:
5210         /* destroyed the asoc */
5211 #ifdef SCTP_LOG_CLOSING
5212         sctp_log_closing(inp, NULL, 11);
5213 #endif
5214         return (1);
5215 }
5216
5217
5218
5219 /*
5220  * determine if a destination is "reachable" based upon the addresses bound
5221  * to the current endpoint (e.g. only v4 or v6 currently bound)
5222  */
5223 /*
5224  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5225  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5226  * types bound as its endpoint
5227  */
5228 int
5229 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5230 {
5231         struct sctp_inpcb *inp;
5232         int answer;
5233
5234         /*
5235          * No locks here, the TCB, in all cases is already locked and an
5236          * assoc is up. There is either a INP lock by the caller applied (in
5237          * asconf case when deleting an address) or NOT in the HB case,
5238          * however if HB then the INP increment is up and the INP will not
5239          * be removed (on top of the fact that we have a TCB lock). So we
5240          * only want to read the sctp_flags, which is either bound-all or
5241          * not.. no protection needed since once an assoc is up you can't be
5242          * changing your binding.
5243          */
5244         inp = stcb->sctp_ep;
5245         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5246                 /* if bound all, destination is not restricted */
5247                 /*
5248                  * RRS: Question during lock work: Is this correct? If you
5249                  * are bound-all you still might need to obey the V4--V6
5250                  * flags??? IMO this bound-all stuff needs to be removed!
5251                  */
5252                 return (1);
5253         }
5254         /* NOTE: all "scope" checks are done when local addresses are added */
5255         switch (destaddr->sa_family) {
5256 #ifdef INET6
5257         case AF_INET6:
5258                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5259                 break;
5260 #endif
5261 #ifdef INET
5262         case AF_INET:
5263                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5264                 break;
5265 #endif
5266         default:
5267                 /* invalid family, so it's unreachable */
5268                 answer = 0;
5269                 break;
5270         }
5271         return (answer);
5272 }
5273
5274 /*
5275  * update the inp_vflags on an endpoint
5276  */
5277 static void
5278 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5279 {
5280         struct sctp_laddr *laddr;
5281
5282         /* first clear the flag */
5283         inp->ip_inp.inp.inp_vflag = 0;
5284         /* set the flag based on addresses on the ep list */
5285         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5286                 if (laddr->ifa == NULL) {
5287                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5288                             __func__);
5289                         continue;
5290                 }
5291                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5292                         continue;
5293                 }
5294                 switch (laddr->ifa->address.sa.sa_family) {
5295 #ifdef INET6
5296                 case AF_INET6:
5297                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5298                         break;
5299 #endif
5300 #ifdef INET
5301                 case AF_INET:
5302                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5303                         break;
5304 #endif
5305                 default:
5306                         break;
5307                 }
5308         }
5309 }
5310
5311 /*
5312  * Add the address to the endpoint local address list There is nothing to be
5313  * done if we are bound to all addresses
5314  */
5315 void
5316 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5317 {
5318         struct sctp_laddr *laddr;
5319         struct sctp_tcb *stcb;
5320         int fnd, error = 0;
5321
5322         fnd = 0;
5323
5324         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5325                 /* You are already bound to all. You have it already */
5326                 return;
5327         }
5328 #ifdef INET6
5329         if (ifa->address.sa.sa_family == AF_INET6) {
5330                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5331                         /* Can't bind a non-useable addr. */
5332                         return;
5333                 }
5334         }
5335 #endif
5336         /* first, is it already present? */
5337         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5338                 if (laddr->ifa == ifa) {
5339                         fnd = 1;
5340                         break;
5341                 }
5342         }
5343
5344         if (fnd == 0) {
5345                 /* Not in the ep list */
5346                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5347                 if (error != 0)
5348                         return;
5349                 inp->laddr_count++;
5350                 /* update inp_vflag flags */
5351                 switch (ifa->address.sa.sa_family) {
5352 #ifdef INET6
5353                 case AF_INET6:
5354                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5355                         break;
5356 #endif
5357 #ifdef INET
5358                 case AF_INET:
5359                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5360                         break;
5361 #endif
5362                 default:
5363                         break;
5364                 }
5365                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5366                         sctp_add_local_addr_restricted(stcb, ifa);
5367                 }
5368         }
5369         return;
5370 }
5371
5372
5373 /*
5374  * select a new (hopefully reachable) destination net (should only be used
5375  * when we deleted an ep addr that is the only usable source address to reach
5376  * the destination net)
5377  */
5378 static void
5379 sctp_select_primary_destination(struct sctp_tcb *stcb)
5380 {
5381         struct sctp_nets *net;
5382
5383         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5384                 /* for now, we'll just pick the first reachable one we find */
5385                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5386                         continue;
5387                 if (sctp_destination_is_reachable(stcb,
5388                     (struct sockaddr *)&net->ro._l_addr)) {
5389                         /* found a reachable destination */
5390                         stcb->asoc.primary_destination = net;
5391                 }
5392         }
5393         /* I can't there from here! ...we're gonna die shortly... */
5394 }
5395
5396
5397 /*
5398  * Delete the address from the endpoint local address list. There is nothing
5399  * to be done if we are bound to all addresses
5400  */
5401 void
5402 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5403 {
5404         struct sctp_laddr *laddr;
5405         int fnd;
5406
5407         fnd = 0;
5408         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5409                 /* You are already bound to all. You have it already */
5410                 return;
5411         }
5412         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5413                 if (laddr->ifa == ifa) {
5414                         fnd = 1;
5415                         break;
5416                 }
5417         }
5418         if (fnd && (inp->laddr_count < 2)) {
5419                 /* can't delete unless there are at LEAST 2 addresses */
5420                 return;
5421         }
5422         if (fnd) {
5423                 /*
5424                  * clean up any use of this address go through our
5425                  * associations and clear any last_used_address that match
5426                  * this one for each assoc, see if a new primary_destination
5427                  * is needed
5428                  */
5429                 struct sctp_tcb *stcb;
5430
5431                 /* clean up "next_addr_touse" */
5432                 if (inp->next_addr_touse == laddr)
5433                         /* delete this address */
5434                         inp->next_addr_touse = NULL;
5435
5436                 /* clean up "last_used_address" */
5437                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5438                         struct sctp_nets *net;
5439
5440                         SCTP_TCB_LOCK(stcb);
5441                         if (stcb->asoc.last_used_address == laddr)
5442                                 /* delete this address */
5443                                 stcb->asoc.last_used_address = NULL;
5444                         /*
5445                          * Now spin through all the nets and purge any ref
5446                          * to laddr
5447                          */
5448                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5449                                 if (net->ro._s_addr == laddr->ifa) {
5450                                         /* Yep, purge src address selected */
5451                                         sctp_rtentry_t *rt;
5452
5453                                         /* delete this address if cached */
5454                                         rt = net->ro.ro_rt;
5455                                         if (rt != NULL) {
5456                                                 RTFREE(rt);
5457                                                 net->ro.ro_rt = NULL;
5458                                         }
5459                                         sctp_free_ifa(net->ro._s_addr);
5460                                         net->ro._s_addr = NULL;
5461                                         net->src_addr_selected = 0;
5462                                 }
5463                         }
5464                         SCTP_TCB_UNLOCK(stcb);
5465                 }               /* for each tcb */
5466                 /* remove it from the ep list */
5467                 sctp_remove_laddr(laddr);
5468                 inp->laddr_count--;
5469                 /* update inp_vflag flags */
5470                 sctp_update_ep_vflag(inp);
5471         }
5472         return;
5473 }
5474
5475 /*
5476  * Add the address to the TCB local address restricted list.
5477  * This is a "pending" address list (eg. addresses waiting for an
5478  * ASCONF-ACK response) and cannot be used as a valid source address.
5479  */
5480 void
5481 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5482 {
5483         struct sctp_laddr *laddr;
5484         struct sctpladdr *list;
5485
5486         /*
5487          * Assumes TCB is locked.. and possibly the INP. May need to
5488          * confirm/fix that if we need it and is not the case.
5489          */
5490         list = &stcb->asoc.sctp_restricted_addrs;
5491
5492 #ifdef INET6
5493         if (ifa->address.sa.sa_family == AF_INET6) {
5494                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5495                         /* Can't bind a non-existent addr. */
5496                         return;
5497                 }
5498         }
5499 #endif
5500         /* does the address already exist? */
5501         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5502                 if (laddr->ifa == ifa) {
5503                         return;
5504                 }
5505         }
5506
5507         /* add to the list */
5508         (void)sctp_insert_laddr(list, ifa, 0);
5509         return;
5510 }
5511
5512 /*
5513  * Remove a local address from the TCB local address restricted list
5514  */
5515 void
5516 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5517 {
5518         struct sctp_inpcb *inp;
5519         struct sctp_laddr *laddr;
5520
5521         /*
5522          * This is called by asconf work. It is assumed that a) The TCB is
5523          * locked and b) The INP is locked. This is true in as much as I can
5524          * trace through the entry asconf code where I did these locks.
5525          * Again, the ASCONF code is a bit different in that it does lock
5526          * the INP during its work often times. This must be since we don't
5527          * want other proc's looking up things while what they are looking
5528          * up is changing :-D
5529          */
5530
5531         inp = stcb->sctp_ep;
5532         /* if subset bound and don't allow ASCONF's, can't delete last */
5533         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5534             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5535                 if (stcb->sctp_ep->laddr_count < 2) {
5536                         /* can't delete last address */
5537                         return;
5538                 }
5539         }
5540         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5541                 /* remove the address if it exists */
5542                 if (laddr->ifa == NULL)
5543                         continue;
5544                 if (laddr->ifa == ifa) {
5545                         sctp_remove_laddr(laddr);
5546                         return;
5547                 }
5548         }
5549
5550         /* address not found! */
5551         return;
5552 }
5553
5554 /*
5555  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5556  */
5557 /* sysctl */
5558 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5559 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5560
5561
5562
5563 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5564 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5565 int *sctp_cpuarry = NULL;
5566 void
5567 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5568 {
5569         /* Queue a packet to a processor for the specified core */
5570         struct sctp_mcore_queue *qent;
5571         struct sctp_mcore_ctrl *wkq;
5572         int need_wake = 0;
5573
5574         if (sctp_mcore_workers == NULL) {
5575                 /* Something went way bad during setup */
5576                 sctp_input_with_port(m, off, 0);
5577                 return;
5578         }
5579         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5580             (sizeof(struct sctp_mcore_queue)),
5581             SCTP_M_MCORE);
5582         if (qent == NULL) {
5583                 /* This is trouble  */
5584                 sctp_input_with_port(m, off, 0);
5585                 return;
5586         }
5587         qent->vn = curvnet;
5588         qent->m = m;
5589         qent->off = off;
5590         qent->v6 = 0;
5591         wkq = &sctp_mcore_workers[cpu_to_use];
5592         SCTP_MCORE_QLOCK(wkq);
5593
5594         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5595         if (wkq->running == 0) {
5596                 need_wake = 1;
5597         }
5598         SCTP_MCORE_QUNLOCK(wkq);
5599         if (need_wake) {
5600                 wakeup(&wkq->running);
5601         }
5602 }
5603
5604 static void
5605 sctp_mcore_thread(void *arg)
5606 {
5607
5608         struct sctp_mcore_ctrl *wkq;
5609         struct sctp_mcore_queue *qent;
5610
5611         wkq = (struct sctp_mcore_ctrl *)arg;
5612         struct mbuf *m;
5613         int off, v6;
5614
5615         /* Wait for first tickle */
5616         SCTP_MCORE_LOCK(wkq);
5617         wkq->running = 0;
5618         msleep(&wkq->running,
5619             &wkq->core_mtx,
5620             0, "wait for pkt", 0);
5621         SCTP_MCORE_UNLOCK(wkq);
5622
5623         /* Bind to our cpu */
5624         thread_lock(curthread);
5625         sched_bind(curthread, wkq->cpuid);
5626         thread_unlock(curthread);
5627
5628         /* Now lets start working */
5629         SCTP_MCORE_LOCK(wkq);
5630         /* Now grab lock and go */
5631         for (;;) {
5632                 SCTP_MCORE_QLOCK(wkq);
5633 skip_sleep:
5634                 wkq->running = 1;
5635                 qent = TAILQ_FIRST(&wkq->que);
5636                 if (qent) {
5637                         TAILQ_REMOVE(&wkq->que, qent, next);
5638                         SCTP_MCORE_QUNLOCK(wkq);
5639                         CURVNET_SET(qent->vn);
5640                         m = qent->m;
5641                         off = qent->off;
5642                         v6 = qent->v6;
5643                         SCTP_FREE(qent, SCTP_M_MCORE);
5644                         if (v6 == 0) {
5645                                 sctp_input_with_port(m, off, 0);
5646                         } else {
5647                                 SCTP_PRINTF("V6 not yet supported\n");
5648                                 sctp_m_freem(m);
5649                         }
5650                         CURVNET_RESTORE();
5651                         SCTP_MCORE_QLOCK(wkq);
5652                 }
5653                 wkq->running = 0;
5654                 if (!TAILQ_EMPTY(&wkq->que)) {
5655                         goto skip_sleep;
5656                 }
5657                 SCTP_MCORE_QUNLOCK(wkq);
5658                 msleep(&wkq->running,
5659                     &wkq->core_mtx,
5660                     0, "wait for pkt", 0);
5661         }
5662 }
5663
5664 static void
5665 sctp_startup_mcore_threads(void)
5666 {
5667         int i, cpu;
5668
5669         if (mp_ncpus == 1)
5670                 return;
5671
5672         if (sctp_mcore_workers != NULL) {
5673                 /*
5674                  * Already been here in some previous vnet?
5675                  */
5676                 return;
5677         }
5678         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5679             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5680             SCTP_M_MCORE);
5681         if (sctp_mcore_workers == NULL) {
5682                 /* TSNH I hope */
5683                 return;
5684         }
5685         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5686             sizeof(struct sctp_mcore_ctrl)));
5687         /* Init the structures */
5688         for (i = 0; i <= mp_maxid; i++) {
5689                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5690                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5691                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5692                 sctp_mcore_workers[i].cpuid = i;
5693         }
5694         if (sctp_cpuarry == NULL) {
5695                 SCTP_MALLOC(sctp_cpuarry, int *,
5696                     (mp_ncpus * sizeof(int)),
5697                     SCTP_M_MCORE);
5698                 i = 0;
5699                 CPU_FOREACH(cpu) {
5700                         sctp_cpuarry[i] = cpu;
5701                         i++;
5702                 }
5703         }
5704         /* Now start them all */
5705         CPU_FOREACH(cpu) {
5706                 (void)kproc_create(sctp_mcore_thread,
5707                     (void *)&sctp_mcore_workers[cpu],
5708                     &sctp_mcore_workers[cpu].thread_proc,
5709                     RFPROC,
5710                     SCTP_KTHREAD_PAGES,
5711                     SCTP_MCORE_NAME);
5712
5713         }
5714 }
5715 #endif
5716
5717 void
5718 sctp_pcb_init()
5719 {
5720         /*
5721          * SCTP initialization for the PCB structures should be called by
5722          * the sctp_init() function.
5723          */
5724         int i;
5725         struct timeval tv;
5726
5727         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5728                 /* error I was called twice */
5729                 return;
5730         }
5731         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5732
5733 #if defined(SCTP_LOCAL_TRACE_BUF)
5734         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5735 #endif
5736 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5737         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5738             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5739             SCTP_M_MCORE);
5740 #endif
5741         (void)SCTP_GETTIME_TIMEVAL(&tv);
5742 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5743         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5744         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
5745         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
5746 #else
5747         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5748         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
5749         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
5750 #endif
5751         /* init the empty list of (All) Endpoints */
5752         LIST_INIT(&SCTP_BASE_INFO(listhead));
5753
5754
5755         /* init the hash table of endpoints */
5756         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5757         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5758         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5759         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5760             &SCTP_BASE_INFO(hashasocmark));
5761         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5762             &SCTP_BASE_INFO(hashmark));
5763         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5764             &SCTP_BASE_INFO(hashtcpmark));
5765         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5766
5767
5768         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5769             &SCTP_BASE_INFO(hashvrfmark));
5770
5771         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5772             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5773         /* init the zones */
5774         /*
5775          * FIX ME: Should check for NULL returns, but if it does fail we are
5776          * doomed to panic anyways... add later maybe.
5777          */
5778         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5779             sizeof(struct sctp_inpcb), maxsockets);
5780
5781         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5782             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5783
5784         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5785             sizeof(struct sctp_laddr),
5786             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5787
5788         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5789             sizeof(struct sctp_nets),
5790             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5791
5792         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5793             sizeof(struct sctp_tmit_chunk),
5794             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5795
5796         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5797             sizeof(struct sctp_queued_to_read),
5798             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5799
5800         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5801             sizeof(struct sctp_stream_queue_pending),
5802             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5803
5804         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5805             sizeof(struct sctp_asconf),
5806             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5807
5808         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5809             sizeof(struct sctp_asconf_ack),
5810             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5811
5812
5813         /* Master Lock INIT for info structure */
5814         SCTP_INP_INFO_LOCK_INIT();
5815         SCTP_STATLOG_INIT_LOCK();
5816
5817         SCTP_IPI_COUNT_INIT();
5818         SCTP_IPI_ADDR_INIT();
5819 #ifdef SCTP_PACKET_LOGGING
5820         SCTP_IP_PKTLOG_INIT();
5821 #endif
5822         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5823
5824         SCTP_WQ_ADDR_INIT();
5825         /* not sure if we need all the counts */
5826         SCTP_BASE_INFO(ipi_count_ep) = 0;
5827         /* assoc/tcb zone info */
5828         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5829         /* local addrlist zone info */
5830         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5831         /* remote addrlist zone info */
5832         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5833         /* chunk info */
5834         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5835
5836         /* socket queue zone info */
5837         SCTP_BASE_INFO(ipi_count_readq) = 0;
5838
5839         /* stream out queue cont */
5840         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5841
5842         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5843         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5844
5845         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5846
5847         /* Init the TIMEWAIT list */
5848         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5849                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5850         }
5851         sctp_startup_iterator();
5852
5853 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5854         sctp_startup_mcore_threads();
5855 #endif
5856
5857         /*
5858          * INIT the default VRF which for BSD is the only one, other O/S's
5859          * may have more. But initially they must start with one and then
5860          * add the VRF's as addresses are added.
5861          */
5862         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5863 }
5864
5865 /*
5866  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5867  */
5868 void
5869 sctp_pcb_finish(void)
5870 {
5871         struct sctp_vrflist *vrf_bucket;
5872         struct sctp_vrf *vrf, *nvrf;
5873         struct sctp_ifn *ifn, *nifn;
5874         struct sctp_ifa *ifa, *nifa;
5875         struct sctpvtaghead *chain;
5876         struct sctp_tagblock *twait_block, *prev_twait_block;
5877         struct sctp_laddr *wi, *nwi;
5878         int i;
5879         struct sctp_iterator *it, *nit;
5880
5881         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5882                 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5883                 return;
5884         }
5885         SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5886         /*
5887          * In FreeBSD the iterator thread never exits but we do clean up.
5888          * The only way FreeBSD reaches here is if we have VRF's but we
5889          * still add the ifdef to make it compile on old versions.
5890          */
5891 retry:
5892         SCTP_IPI_ITERATOR_WQ_LOCK();
5893         /*
5894          * sctp_iterator_worker() might be working on an it entry without
5895          * holding the lock.  We won't find it on the list either and
5896          * continue and free/destroy it.  While holding the lock, spin, to
5897          * avoid the race condition as sctp_iterator_worker() will have to
5898          * wait to re-aquire the lock.
5899          */
5900         if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5901                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5902                 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5903                     "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5904                 DELAY(10);
5905                 goto retry;
5906         }
5907         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5908                 if (it->vn != curvnet) {
5909                         continue;
5910                 }
5911                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5912                 if (it->function_atend != NULL) {
5913                         (*it->function_atend) (it->pointer, it->val);
5914                 }
5915                 SCTP_FREE(it, SCTP_M_ITER);
5916         }
5917         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5918         SCTP_ITERATOR_LOCK();
5919         if ((sctp_it_ctl.cur_it) &&
5920             (sctp_it_ctl.cur_it->vn == curvnet)) {
5921                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5922         }
5923         SCTP_ITERATOR_UNLOCK();
5924         SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5925         SCTP_WQ_ADDR_LOCK();
5926         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5927                 LIST_REMOVE(wi, sctp_nxt_addr);
5928                 SCTP_DECR_LADDR_COUNT();
5929                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5930                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
5931                 }
5932                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5933         }
5934         SCTP_WQ_ADDR_UNLOCK();
5935
5936         /*
5937          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5938          * destroyed first).
5939          */
5940         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5941         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5942                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5943                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5944                                 /* free the ifa */
5945                                 LIST_REMOVE(ifa, next_bucket);
5946                                 LIST_REMOVE(ifa, next_ifa);
5947                                 SCTP_FREE(ifa, SCTP_M_IFA);
5948                         }
5949                         /* free the ifn */
5950                         LIST_REMOVE(ifn, next_bucket);
5951                         LIST_REMOVE(ifn, next_ifn);
5952                         SCTP_FREE(ifn, SCTP_M_IFN);
5953                 }
5954                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5955                 /* free the vrf */
5956                 LIST_REMOVE(vrf, next_vrf);
5957                 SCTP_FREE(vrf, SCTP_M_VRF);
5958         }
5959         /* free the vrf hashes */
5960         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5961         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5962
5963         /*
5964          * free the TIMEWAIT list elements malloc'd in the function
5965          * sctp_add_vtag_to_timewait()...
5966          */
5967         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5968                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5969                 if (!LIST_EMPTY(chain)) {
5970                         prev_twait_block = NULL;
5971                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5972                                 if (prev_twait_block) {
5973                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5974                                 }
5975                                 prev_twait_block = twait_block;
5976                         }
5977                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5978                 }
5979         }
5980
5981         /* free the locks and mutexes */
5982 #ifdef SCTP_PACKET_LOGGING
5983         SCTP_IP_PKTLOG_DESTROY();
5984 #endif
5985         SCTP_IPI_ADDR_DESTROY();
5986         SCTP_STATLOG_DESTROY();
5987         SCTP_INP_INFO_LOCK_DESTROY();
5988
5989         SCTP_WQ_ADDR_DESTROY();
5990
5991         /* Get rid of other stuff too. */
5992         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5993                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5994         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5995                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5996         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5997                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5998
5999         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6000         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6001         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6002         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6003         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6004         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6005         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6006         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6007         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6008 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6009         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6010 #endif
6011 }
6012
6013
6014 int
6015 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6016     int offset, int limit,
6017     struct sockaddr *src, struct sockaddr *dst,
6018     struct sockaddr *altsa, uint16_t port)
6019 {
6020         /*
6021          * grub through the INIT pulling addresses and loading them to the
6022          * nets structure in the asoc. The from address in the mbuf should
6023          * also be loaded (if it is not already). This routine can be called
6024          * with either INIT or INIT-ACK's as long as the m points to the IP
6025          * packet and the offset points to the beginning of the parameters.
6026          */
6027         struct sctp_inpcb *inp;
6028         struct sctp_nets *net, *nnet, *net_tmp;
6029         struct sctp_paramhdr *phdr, param_buf;
6030         struct sctp_tcb *stcb_tmp;
6031         uint16_t ptype, plen;
6032         struct sockaddr *sa;
6033         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6034         struct sctp_auth_random *p_random = NULL;
6035         uint16_t random_len = 0;
6036         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6037         struct sctp_auth_hmac_algo *hmacs = NULL;
6038         uint16_t hmacs_len = 0;
6039         uint8_t saw_asconf = 0;
6040         uint8_t saw_asconf_ack = 0;
6041         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6042         struct sctp_auth_chunk_list *chunks = NULL;
6043         uint16_t num_chunks = 0;
6044         sctp_key_t *new_key;
6045         uint32_t keylen;
6046         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6047         uint8_t peer_supports_ecn;
6048         uint8_t peer_supports_prsctp;
6049         uint8_t peer_supports_auth;
6050         uint8_t peer_supports_asconf;
6051         uint8_t peer_supports_asconf_ack;
6052         uint8_t peer_supports_reconfig;
6053         uint8_t peer_supports_nrsack;
6054         uint8_t peer_supports_pktdrop;
6055         uint8_t peer_supports_idata;
6056 #ifdef INET
6057         struct sockaddr_in sin;
6058 #endif
6059 #ifdef INET6
6060         struct sockaddr_in6 sin6;
6061 #endif
6062
6063         /* First get the destination address setup too. */
6064 #ifdef INET
6065         memset(&sin, 0, sizeof(sin));
6066         sin.sin_family = AF_INET;
6067         sin.sin_len = sizeof(sin);
6068         sin.sin_port = stcb->rport;
6069 #endif
6070 #ifdef INET6
6071         memset(&sin6, 0, sizeof(sin6));
6072         sin6.sin6_family = AF_INET6;
6073         sin6.sin6_len = sizeof(struct sockaddr_in6);
6074         sin6.sin6_port = stcb->rport;
6075 #endif
6076         if (altsa) {
6077                 sa = altsa;
6078         } else {
6079                 sa = src;
6080         }
6081         peer_supports_idata = 0;
6082         peer_supports_ecn = 0;
6083         peer_supports_prsctp = 0;
6084         peer_supports_auth = 0;
6085         peer_supports_asconf = 0;
6086         peer_supports_reconfig = 0;
6087         peer_supports_nrsack = 0;
6088         peer_supports_pktdrop = 0;
6089         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6090                 /* mark all addresses that we have currently on the list */
6091                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6092         }
6093         /* does the source address already exist? if so skip it */
6094         inp = stcb->sctp_ep;
6095         atomic_add_int(&stcb->asoc.refcnt, 1);
6096         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6097         atomic_add_int(&stcb->asoc.refcnt, -1);
6098
6099         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6100                 /* we must add the source address */
6101                 /* no scope set here since we have a tcb already. */
6102                 switch (sa->sa_family) {
6103 #ifdef INET
6104                 case AF_INET:
6105                         if (stcb->asoc.scope.ipv4_addr_legal) {
6106                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6107                                         return (-1);
6108                                 }
6109                         }
6110                         break;
6111 #endif
6112 #ifdef INET6
6113                 case AF_INET6:
6114                         if (stcb->asoc.scope.ipv6_addr_legal) {
6115                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6116                                         return (-2);
6117                                 }
6118                         }
6119                         break;
6120 #endif
6121                 default:
6122                         break;
6123                 }
6124         } else {
6125                 if (net_tmp != NULL && stcb_tmp == stcb) {
6126                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6127                 } else if (stcb_tmp != stcb) {
6128                         /* It belongs to another association? */
6129                         if (stcb_tmp)
6130                                 SCTP_TCB_UNLOCK(stcb_tmp);
6131                         return (-3);
6132                 }
6133         }
6134         if (stcb->asoc.state == 0) {
6135                 /* the assoc was freed? */
6136                 return (-4);
6137         }
6138         /* now we must go through each of the params. */
6139         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
6140         while (phdr) {
6141                 ptype = ntohs(phdr->param_type);
6142                 plen = ntohs(phdr->param_length);
6143                 /*
6144                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6145                  * (uint32_t)ptype, (int)plen);
6146                  */
6147                 if (offset + plen > limit) {
6148                         break;
6149                 }
6150                 if (plen == 0) {
6151                         break;
6152                 }
6153 #ifdef INET
6154                 if (ptype == SCTP_IPV4_ADDRESS) {
6155                         if (stcb->asoc.scope.ipv4_addr_legal) {
6156                                 struct sctp_ipv4addr_param *p4, p4_buf;
6157
6158                                 /* ok get the v4 address and check/add */
6159                                 phdr = sctp_get_next_param(m, offset,
6160                                     (struct sctp_paramhdr *)&p4_buf,
6161                                     sizeof(p4_buf));
6162                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6163                                     phdr == NULL) {
6164                                         return (-5);
6165                                 }
6166                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6167                                 sin.sin_addr.s_addr = p4->addr;
6168                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6169                                         /* Skip multi-cast addresses */
6170                                         goto next_param;
6171                                 }
6172                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6173                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6174                                         goto next_param;
6175                                 }
6176                                 sa = (struct sockaddr *)&sin;
6177                                 inp = stcb->sctp_ep;
6178                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6179                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6180                                     dst, stcb);
6181                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6182
6183                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6184                                     inp == NULL) {
6185                                         /* we must add the source address */
6186                                         /*
6187                                          * no scope set since we have a tcb
6188                                          * already
6189                                          */
6190
6191                                         /*
6192                                          * we must validate the state again
6193                                          * here
6194                                          */
6195                         add_it_now:
6196                                         if (stcb->asoc.state == 0) {
6197                                                 /* the assoc was freed? */
6198                                                 return (-7);
6199                                         }
6200                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6201                                                 return (-8);
6202                                         }
6203                                 } else if (stcb_tmp == stcb) {
6204                                         if (stcb->asoc.state == 0) {
6205                                                 /* the assoc was freed? */
6206                                                 return (-10);
6207                                         }
6208                                         if (net != NULL) {
6209                                                 /* clear flag */
6210                                                 net->dest_state &=
6211                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6212                                         }
6213                                 } else {
6214                                         /*
6215                                          * strange, address is in another
6216                                          * assoc? straighten out locks.
6217                                          */
6218                                         if (stcb_tmp) {
6219                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6220                                                         struct mbuf *op_err;
6221                                                         char msg[SCTP_DIAG_INFO_LEN];
6222
6223                                                         /*
6224                                                          * in setup state we
6225                                                          * abort this guy
6226                                                          */
6227                                                         snprintf(msg, sizeof(msg),
6228                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6229                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6230                                                             msg);
6231                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6232                                                             stcb_tmp, op_err,
6233                                                             SCTP_SO_NOT_LOCKED);
6234                                                         goto add_it_now;
6235                                                 }
6236                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6237                                         }
6238                                         if (stcb->asoc.state == 0) {
6239                                                 /* the assoc was freed? */
6240                                                 return (-12);
6241                                         }
6242                                         return (-13);
6243                                 }
6244                         }
6245                 } else
6246 #endif
6247 #ifdef INET6
6248                 if (ptype == SCTP_IPV6_ADDRESS) {
6249                         if (stcb->asoc.scope.ipv6_addr_legal) {
6250                                 /* ok get the v6 address and check/add */
6251                                 struct sctp_ipv6addr_param *p6, p6_buf;
6252
6253                                 phdr = sctp_get_next_param(m, offset,
6254                                     (struct sctp_paramhdr *)&p6_buf,
6255                                     sizeof(p6_buf));
6256                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6257                                     phdr == NULL) {
6258                                         return (-14);
6259                                 }
6260                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6261                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6262                                     sizeof(p6->addr));
6263                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6264                                         /* Skip multi-cast addresses */
6265                                         goto next_param;
6266                                 }
6267                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6268                                         /*
6269                                          * Link local make no sense without
6270                                          * scope
6271                                          */
6272                                         goto next_param;
6273                                 }
6274                                 sa = (struct sockaddr *)&sin6;
6275                                 inp = stcb->sctp_ep;
6276                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6277                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6278                                     dst, stcb);
6279                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6280                                 if (stcb_tmp == NULL &&
6281                                     (inp == stcb->sctp_ep || inp == NULL)) {
6282                                         /*
6283                                          * we must validate the state again
6284                                          * here
6285                                          */
6286                         add_it_now6:
6287                                         if (stcb->asoc.state == 0) {
6288                                                 /* the assoc was freed? */
6289                                                 return (-16);
6290                                         }
6291                                         /*
6292                                          * we must add the address, no scope
6293                                          * set
6294                                          */
6295                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6296                                                 return (-17);
6297                                         }
6298                                 } else if (stcb_tmp == stcb) {
6299                                         /*
6300                                          * we must validate the state again
6301                                          * here
6302                                          */
6303                                         if (stcb->asoc.state == 0) {
6304                                                 /* the assoc was freed? */
6305                                                 return (-19);
6306                                         }
6307                                         if (net != NULL) {
6308                                                 /* clear flag */
6309                                                 net->dest_state &=
6310                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6311                                         }
6312                                 } else {
6313                                         /*
6314                                          * strange, address is in another
6315                                          * assoc? straighten out locks.
6316                                          */
6317                                         if (stcb_tmp) {
6318                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6319                                                         struct mbuf *op_err;
6320                                                         char msg[SCTP_DIAG_INFO_LEN];
6321
6322                                                         /*
6323                                                          * in setup state we
6324                                                          * abort this guy
6325                                                          */
6326                                                         snprintf(msg, sizeof(msg),
6327                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6328                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6329                                                             msg);
6330                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6331                                                             stcb_tmp, op_err,
6332                                                             SCTP_SO_NOT_LOCKED);
6333                                                         goto add_it_now6;
6334                                                 }
6335                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6336                                         }
6337                                         if (stcb->asoc.state == 0) {
6338                                                 /* the assoc was freed? */
6339                                                 return (-21);
6340                                         }
6341                                         return (-22);
6342                                 }
6343                         }
6344                 } else
6345 #endif
6346                 if (ptype == SCTP_ECN_CAPABLE) {
6347                         peer_supports_ecn = 1;
6348                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6349                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6350                                 struct sctp_adaptation_layer_indication ai,
6351                                                                 *aip;
6352
6353                                 phdr = sctp_get_next_param(m, offset,
6354                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6355                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6356                                 if (aip) {
6357                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6358                                         stcb->asoc.adaptation_needed = 1;
6359                                 }
6360                         }
6361                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6362                         struct sctp_asconf_addr_param lstore, *fee;
6363                         int lptype;
6364                         struct sockaddr *lsa = NULL;
6365 #ifdef INET
6366                         struct sctp_asconf_addrv4_param *fii;
6367 #endif
6368
6369                         if (stcb->asoc.asconf_supported == 0) {
6370                                 return (-100);
6371                         }
6372                         if (plen > sizeof(lstore)) {
6373                                 return (-23);
6374                         }
6375                         phdr = sctp_get_next_param(m, offset,
6376                             (struct sctp_paramhdr *)&lstore,
6377                             plen);
6378                         if (phdr == NULL) {
6379                                 return (-24);
6380                         }
6381                         fee = (struct sctp_asconf_addr_param *)phdr;
6382                         lptype = ntohs(fee->addrp.ph.param_type);
6383                         switch (lptype) {
6384 #ifdef INET
6385                         case SCTP_IPV4_ADDRESS:
6386                                 if (plen !=
6387                                     sizeof(struct sctp_asconf_addrv4_param)) {
6388                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6389                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6390                                             plen);
6391                                 } else {
6392                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6393                                         sin.sin_addr.s_addr = fii->addrp.addr;
6394                                         lsa = (struct sockaddr *)&sin;
6395                                 }
6396                                 break;
6397 #endif
6398 #ifdef INET6
6399                         case SCTP_IPV6_ADDRESS:
6400                                 if (plen !=
6401                                     sizeof(struct sctp_asconf_addr_param)) {
6402                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6403                                             (int)sizeof(struct sctp_asconf_addr_param),
6404                                             plen);
6405                                 } else {
6406                                         memcpy(sin6.sin6_addr.s6_addr,
6407                                             fee->addrp.addr,
6408                                             sizeof(fee->addrp.addr));
6409                                         lsa = (struct sockaddr *)&sin6;
6410                                 }
6411                                 break;
6412 #endif
6413                         default:
6414                                 break;
6415                         }
6416                         if (lsa) {
6417                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6418                         }
6419                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6420                         stcb->asoc.peer_supports_nat = 1;
6421                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6422                         /* Peer supports pr-sctp */
6423                         peer_supports_prsctp = 1;
6424                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6425                         /* A supported extension chunk */
6426                         struct sctp_supported_chunk_types_param *pr_supported;
6427                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6428                         int num_ent, i;
6429
6430                         if (plen > sizeof(local_store)) {
6431                                 return (-35);
6432                         }
6433                         phdr = sctp_get_next_param(m, offset,
6434                             (struct sctp_paramhdr *)&local_store, plen);
6435                         if (phdr == NULL) {
6436                                 return (-25);
6437                         }
6438                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6439                         num_ent = plen - sizeof(struct sctp_paramhdr);
6440                         for (i = 0; i < num_ent; i++) {
6441                                 switch (pr_supported->chunk_types[i]) {
6442                                 case SCTP_ASCONF:
6443                                         peer_supports_asconf = 1;
6444                                         break;
6445                                 case SCTP_ASCONF_ACK:
6446                                         peer_supports_asconf_ack = 1;
6447                                         break;
6448                                 case SCTP_FORWARD_CUM_TSN:
6449                                         peer_supports_prsctp = 1;
6450                                         break;
6451                                 case SCTP_PACKET_DROPPED:
6452                                         peer_supports_pktdrop = 1;
6453                                         break;
6454                                 case SCTP_NR_SELECTIVE_ACK:
6455                                         peer_supports_nrsack = 1;
6456                                         break;
6457                                 case SCTP_STREAM_RESET:
6458                                         peer_supports_reconfig = 1;
6459                                         break;
6460                                 case SCTP_AUTHENTICATION:
6461                                         peer_supports_auth = 1;
6462                                         break;
6463                                 case SCTP_IDATA:
6464                                         peer_supports_idata = 1;
6465                                         break;
6466                                 default:
6467                                         /* one I have not learned yet */
6468                                         break;
6469
6470                                 }
6471                         }
6472                 } else if (ptype == SCTP_RANDOM) {
6473                         if (plen > sizeof(random_store))
6474                                 break;
6475                         if (got_random) {
6476                                 /* already processed a RANDOM */
6477                                 goto next_param;
6478                         }
6479                         phdr = sctp_get_next_param(m, offset,
6480                             (struct sctp_paramhdr *)random_store,
6481                             plen);
6482                         if (phdr == NULL)
6483                                 return (-26);
6484                         p_random = (struct sctp_auth_random *)phdr;
6485                         random_len = plen - sizeof(*p_random);
6486                         /* enforce the random length */
6487                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6488                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6489                                 return (-27);
6490                         }
6491                         got_random = 1;
6492                 } else if (ptype == SCTP_HMAC_LIST) {
6493                         uint16_t num_hmacs;
6494                         uint16_t i;
6495
6496                         if (plen > sizeof(hmacs_store))
6497                                 break;
6498                         if (got_hmacs) {
6499                                 /* already processed a HMAC list */
6500                                 goto next_param;
6501                         }
6502                         phdr = sctp_get_next_param(m, offset,
6503                             (struct sctp_paramhdr *)hmacs_store,
6504                             plen);
6505                         if (phdr == NULL)
6506                                 return (-28);
6507                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6508                         hmacs_len = plen - sizeof(*hmacs);
6509                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6510                         /* validate the hmac list */
6511                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6512                                 return (-29);
6513                         }
6514                         if (stcb->asoc.peer_hmacs != NULL)
6515                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6516                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6517                         if (stcb->asoc.peer_hmacs != NULL) {
6518                                 for (i = 0; i < num_hmacs; i++) {
6519                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6520                                             ntohs(hmacs->hmac_ids[i]));
6521                                 }
6522                         }
6523                         got_hmacs = 1;
6524                 } else if (ptype == SCTP_CHUNK_LIST) {
6525                         int i;
6526
6527                         if (plen > sizeof(chunks_store))
6528                                 break;
6529                         if (got_chklist) {
6530                                 /* already processed a Chunks list */
6531                                 goto next_param;
6532                         }
6533                         phdr = sctp_get_next_param(m, offset,
6534                             (struct sctp_paramhdr *)chunks_store,
6535                             plen);
6536                         if (phdr == NULL)
6537                                 return (-30);
6538                         chunks = (struct sctp_auth_chunk_list *)phdr;
6539                         num_chunks = plen - sizeof(*chunks);
6540                         if (stcb->asoc.peer_auth_chunks != NULL)
6541                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6542                         else
6543                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6544                         for (i = 0; i < num_chunks; i++) {
6545                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6546                                     stcb->asoc.peer_auth_chunks);
6547                                 /* record asconf/asconf-ack if listed */
6548                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6549                                         saw_asconf = 1;
6550                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6551                                         saw_asconf_ack = 1;
6552
6553                         }
6554                         got_chklist = 1;
6555                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6556                             (ptype == SCTP_STATE_COOKIE) ||
6557                             (ptype == SCTP_UNRECOG_PARAM) ||
6558                             (ptype == SCTP_COOKIE_PRESERVE) ||
6559                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6560                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6561                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6562                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6563                     (ptype == SCTP_SUCCESS_REPORT)) {
6564                          /* don't care */ ;
6565                 } else {
6566                         if ((ptype & 0x8000) == 0x0000) {
6567                                 /*
6568                                  * must stop processing the rest of the
6569                                  * param's. Any report bits were handled
6570                                  * with the call to
6571                                  * sctp_arethere_unrecognized_parameters()
6572                                  * when the INIT or INIT-ACK was first seen.
6573                                  */
6574                                 break;
6575                         }
6576                 }
6577
6578 next_param:
6579                 offset += SCTP_SIZE32(plen);
6580                 if (offset >= limit) {
6581                         break;
6582                 }
6583                 phdr = sctp_get_next_param(m, offset, &param_buf,
6584                     sizeof(param_buf));
6585         }
6586         /* Now check to see if we need to purge any addresses */
6587         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6588                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6589                     SCTP_ADDR_NOT_IN_ASSOC) {
6590                         /* This address has been removed from the asoc */
6591                         /* remove and free it */
6592                         stcb->asoc.numnets--;
6593                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6594                         sctp_free_remote_addr(net);
6595                         if (net == stcb->asoc.primary_destination) {
6596                                 stcb->asoc.primary_destination = NULL;
6597                                 sctp_select_primary_destination(stcb);
6598                         }
6599                 }
6600         }
6601         if ((stcb->asoc.ecn_supported == 1) &&
6602             (peer_supports_ecn == 0)) {
6603                 stcb->asoc.ecn_supported = 0;
6604         }
6605         if ((stcb->asoc.prsctp_supported == 1) &&
6606             (peer_supports_prsctp == 0)) {
6607                 stcb->asoc.prsctp_supported = 0;
6608         }
6609         if ((stcb->asoc.auth_supported == 1) &&
6610             ((peer_supports_auth == 0) ||
6611             (got_random == 0) || (got_hmacs == 0))) {
6612                 stcb->asoc.auth_supported = 0;
6613         }
6614         if ((stcb->asoc.asconf_supported == 1) &&
6615             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6616             (stcb->asoc.auth_supported == 0) ||
6617             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6618                 stcb->asoc.asconf_supported = 0;
6619         }
6620         if ((stcb->asoc.reconfig_supported == 1) &&
6621             (peer_supports_reconfig == 0)) {
6622                 stcb->asoc.reconfig_supported = 0;
6623         }
6624         if ((stcb->asoc.idata_supported == 1) &&
6625             (peer_supports_idata == 0)) {
6626                 stcb->asoc.idata_supported = 0;
6627         }
6628         if ((stcb->asoc.nrsack_supported == 1) &&
6629             (peer_supports_nrsack == 0)) {
6630                 stcb->asoc.nrsack_supported = 0;
6631         }
6632         if ((stcb->asoc.pktdrop_supported == 1) &&
6633             (peer_supports_pktdrop == 0)) {
6634                 stcb->asoc.pktdrop_supported = 0;
6635         }
6636         /* validate authentication required parameters */
6637         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6638                 /* peer does not support auth but sent a chunks list? */
6639                 return (-31);
6640         }
6641         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6642                 /* peer supports asconf but not auth? */
6643                 return (-32);
6644         } else if ((peer_supports_asconf == 1) &&
6645                     (peer_supports_auth == 1) &&
6646             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6647                 return (-33);
6648         }
6649         /* concatenate the full random key */
6650         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6651         if (chunks != NULL) {
6652                 keylen += sizeof(*chunks) + num_chunks;
6653         }
6654         new_key = sctp_alloc_key(keylen);
6655         if (new_key != NULL) {
6656                 /* copy in the RANDOM */
6657                 if (p_random != NULL) {
6658                         keylen = sizeof(*p_random) + random_len;
6659                         bcopy(p_random, new_key->key, keylen);
6660                 }
6661                 /* append in the AUTH chunks */
6662                 if (chunks != NULL) {
6663                         bcopy(chunks, new_key->key + keylen,
6664                             sizeof(*chunks) + num_chunks);
6665                         keylen += sizeof(*chunks) + num_chunks;
6666                 }
6667                 /* append in the HMACs */
6668                 if (hmacs != NULL) {
6669                         bcopy(hmacs, new_key->key + keylen,
6670                             sizeof(*hmacs) + hmacs_len);
6671                 }
6672         } else {
6673                 /* failed to get memory for the key */
6674                 return (-34);
6675         }
6676         if (stcb->asoc.authinfo.peer_random != NULL)
6677                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6678         stcb->asoc.authinfo.peer_random = new_key;
6679         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6680         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6681
6682         return (0);
6683 }
6684
6685 int
6686 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6687     struct sctp_nets *net)
6688 {
6689         /* make sure the requested primary address exists in the assoc */
6690         if (net == NULL && sa)
6691                 net = sctp_findnet(stcb, sa);
6692
6693         if (net == NULL) {
6694                 /* didn't find the requested primary address! */
6695                 return (-1);
6696         } else {
6697                 /* set the primary address */
6698                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6699                         /* Must be confirmed, so queue to set */
6700                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6701                         return (0);
6702                 }
6703                 stcb->asoc.primary_destination = net;
6704                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6705                         sctp_free_remote_addr(stcb->asoc.alternate);
6706                         stcb->asoc.alternate = NULL;
6707                 }
6708                 net = TAILQ_FIRST(&stcb->asoc.nets);
6709                 if (net != stcb->asoc.primary_destination) {
6710                         /*
6711                          * first one on the list is NOT the primary
6712                          * sctp_cmpaddr() is much more efficient if the
6713                          * primary is the first on the list, make it so.
6714                          */
6715                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6716                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6717                 }
6718                 return (0);
6719         }
6720 }
6721
6722 int
6723 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6724 {
6725         /*
6726          * This function serves two purposes. It will see if a TAG can be
6727          * re-used and return 1 for yes it is ok and 0 for don't use that
6728          * tag. A secondary function it will do is purge out old tags that
6729          * can be removed.
6730          */
6731         struct sctpvtaghead *chain;
6732         struct sctp_tagblock *twait_block;
6733         struct sctpasochead *head;
6734         struct sctp_tcb *stcb;
6735         int i;
6736
6737         SCTP_INP_INFO_RLOCK();
6738         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6739             SCTP_BASE_INFO(hashasocmark))];
6740         LIST_FOREACH(stcb, head, sctp_asocs) {
6741                 /*
6742                  * We choose not to lock anything here. TCB's can't be
6743                  * removed since we have the read lock, so they can't be
6744                  * freed on us, same thing for the INP. I may be wrong with
6745                  * this assumption, but we will go with it for now :-)
6746                  */
6747                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6748                         continue;
6749                 }
6750                 if (stcb->asoc.my_vtag == tag) {
6751                         /* candidate */
6752                         if (stcb->rport != rport) {
6753                                 continue;
6754                         }
6755                         if (stcb->sctp_ep->sctp_lport != lport) {
6756                                 continue;
6757                         }
6758                         /* Its a used tag set */
6759                         SCTP_INP_INFO_RUNLOCK();
6760                         return (0);
6761                 }
6762         }
6763         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6764         /* Now what about timed wait ? */
6765         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6766                 /*
6767                  * Block(s) are present, lets see if we have this tag in the
6768                  * list
6769                  */
6770                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6771                         if (twait_block->vtag_block[i].v_tag == 0) {
6772                                 /* not used */
6773                                 continue;
6774                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6775                             now->tv_sec) {
6776                                 /* Audit expires this guy */
6777                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6778                                 twait_block->vtag_block[i].v_tag = 0;
6779                                 twait_block->vtag_block[i].lport = 0;
6780                                 twait_block->vtag_block[i].rport = 0;
6781                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6782                                     (twait_block->vtag_block[i].lport == lport) &&
6783                             (twait_block->vtag_block[i].rport == rport)) {
6784                                 /* Bad tag, sorry :< */
6785                                 SCTP_INP_INFO_RUNLOCK();
6786                                 return (0);
6787                         }
6788                 }
6789         }
6790         SCTP_INP_INFO_RUNLOCK();
6791         return (1);
6792 }
6793
6794 static void
6795 sctp_drain_mbufs(struct sctp_tcb *stcb)
6796 {
6797         /*
6798          * We must hunt this association for MBUF's past the cumack (i.e.
6799          * out of order data that we can renege on).
6800          */
6801         struct sctp_association *asoc;
6802         struct sctp_tmit_chunk *chk, *nchk;
6803         uint32_t cumulative_tsn_p1;
6804         struct sctp_queued_to_read *control, *ncontrol;
6805         int cnt, strmat;
6806         uint32_t gap, i;
6807         int fnd = 0;
6808
6809         /* We look for anything larger than the cum-ack + 1 */
6810
6811         asoc = &stcb->asoc;
6812         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6813                 /* none we can reneg on. */
6814                 return;
6815         }
6816         SCTP_STAT_INCR(sctps_protocol_drains_done);
6817         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6818         cnt = 0;
6819         /* Ok that was fun, now we will drain all the inbound streams? */
6820         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6821                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) {
6822 #ifdef INVARIANTS
6823                         if (control->on_strm_q != SCTP_ON_ORDERED) {
6824                                 panic("Huh control: %p on_q: %d -- not ordered?",
6825                                     control, control->on_strm_q);
6826                         }
6827 #endif
6828                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6829                                 /* Yep it is above cum-ack */
6830                                 cnt++;
6831                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6832                                 KASSERT(control->length > 0, ("control has zero length"));
6833                                 if (asoc->size_on_all_streams >= control->length) {
6834                                         asoc->size_on_all_streams -= control->length;
6835                                 } else {
6836 #ifdef INVARIANTS
6837                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6838 #else
6839                                         asoc->size_on_all_streams = 0;
6840 #endif
6841                                 }
6842                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6843                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6844                                 if (control->on_read_q) {
6845                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6846                                         control->on_read_q = 0;
6847                                 }
6848                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm);
6849                                 control->on_strm_q = 0;
6850                                 if (control->data) {
6851                                         sctp_m_freem(control->data);
6852                                         control->data = NULL;
6853                                 }
6854                                 sctp_free_remote_addr(control->whoFrom);
6855                                 /* Now its reasm? */
6856                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6857                                         cnt++;
6858                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6859                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6860                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6861                                                 asoc->size_on_reasm_queue -= chk->send_size;
6862                                         } else {
6863 #ifdef INVARIANTS
6864                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6865 #else
6866                                                 asoc->size_on_reasm_queue = 0;
6867 #endif
6868                                         }
6869                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6870                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6871                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6872                                         if (chk->data) {
6873                                                 sctp_m_freem(chk->data);
6874                                                 chk->data = NULL;
6875                                         }
6876                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6877                                 }
6878                                 sctp_free_a_readq(stcb, control);
6879                         }
6880                 }
6881                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) {
6882 #ifdef INVARIANTS
6883                         if (control->on_strm_q != SCTP_ON_UNORDERED) {
6884                                 panic("Huh control: %p on_q: %d -- not unordered?",
6885                                     control, control->on_strm_q);
6886                         }
6887 #endif
6888                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6889                                 /* Yep it is above cum-ack */
6890                                 cnt++;
6891                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6892                                 KASSERT(control->length > 0, ("control has zero length"));
6893                                 if (asoc->size_on_all_streams >= control->length) {
6894                                         asoc->size_on_all_streams -= control->length;
6895                                 } else {
6896 #ifdef INVARIANTS
6897                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6898 #else
6899                                         asoc->size_on_all_streams = 0;
6900 #endif
6901                                 }
6902                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6903                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6904                                 if (control->on_read_q) {
6905                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6906                                         control->on_read_q = 0;
6907                                 }
6908                                 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm);
6909                                 control->on_strm_q = 0;
6910                                 if (control->data) {
6911                                         sctp_m_freem(control->data);
6912                                         control->data = NULL;
6913                                 }
6914                                 sctp_free_remote_addr(control->whoFrom);
6915                                 /* Now its reasm? */
6916                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6917                                         cnt++;
6918                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6919                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6920                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6921                                                 asoc->size_on_reasm_queue -= chk->send_size;
6922                                         } else {
6923 #ifdef INVARIANTS
6924                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6925 #else
6926                                                 asoc->size_on_reasm_queue = 0;
6927 #endif
6928                                         }
6929                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6930                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6931                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6932                                         if (chk->data) {
6933                                                 sctp_m_freem(chk->data);
6934                                                 chk->data = NULL;
6935                                         }
6936                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6937                                 }
6938                                 sctp_free_a_readq(stcb, control);
6939                         }
6940                 }
6941         }
6942         if (cnt) {
6943                 /* We must back down to see what the new highest is */
6944                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6945                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6946                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6947                                 asoc->highest_tsn_inside_map = i;
6948                                 fnd = 1;
6949                                 break;
6950                         }
6951                 }
6952                 if (!fnd) {
6953                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6954                 }
6955                 /*
6956                  * Question, should we go through the delivery queue? The
6957                  * only reason things are on here is the app not reading OR
6958                  * a p-d-api up. An attacker COULD send enough in to
6959                  * initiate the PD-API and then send a bunch of stuff to
6960                  * other streams... these would wind up on the delivery
6961                  * queue.. and then we would not get to them. But in order
6962                  * to do this I then have to back-track and un-deliver
6963                  * sequence numbers in streams.. el-yucko. I think for now
6964                  * we will NOT look at the delivery queue and leave it to be
6965                  * something to consider later. An alternative would be to
6966                  * abort the P-D-API with a notification and then deliver
6967                  * the data.... Or another method might be to keep track of
6968                  * how many times the situation occurs and if we see a
6969                  * possible attack underway just abort the association.
6970                  */
6971 #ifdef SCTP_DEBUG
6972                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6973 #endif
6974                 /*
6975                  * Now do we need to find a new
6976                  * asoc->highest_tsn_inside_map?
6977                  */
6978                 asoc->last_revoke_count = cnt;
6979                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6980                 /* sa_ignore NO_NULL_CHK */
6981                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6982                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6983         }
6984         /*
6985          * Another issue, in un-setting the TSN's in the mapping array we
6986          * DID NOT adjust the highest_tsn marker.  This will cause one of
6987          * two things to occur. It may cause us to do extra work in checking
6988          * for our mapping array movement. More importantly it may cause us
6989          * to SACK every datagram. This may not be a bad thing though since
6990          * we will recover once we get our cum-ack above and all this stuff
6991          * we dumped recovered.
6992          */
6993 }
6994
6995 void
6996 sctp_drain()
6997 {
6998         /*
6999          * We must walk the PCB lists for ALL associations here. The system
7000          * is LOW on MBUF's and needs help. This is where reneging will
7001          * occur. We really hope this does NOT happen!
7002          */
7003         VNET_ITERATOR_DECL(vnet_iter);
7004         VNET_LIST_RLOCK_NOSLEEP();
7005         VNET_FOREACH(vnet_iter) {
7006                 CURVNET_SET(vnet_iter);
7007                 struct sctp_inpcb *inp;
7008                 struct sctp_tcb *stcb;
7009
7010                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
7011                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7012 #ifdef VIMAGE
7013                         continue;
7014 #else
7015                         return;
7016 #endif
7017                 }
7018                 SCTP_INP_INFO_RLOCK();
7019                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7020                         /* For each endpoint */
7021                         SCTP_INP_RLOCK(inp);
7022                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7023                                 /* For each association */
7024                                 SCTP_TCB_LOCK(stcb);
7025                                 sctp_drain_mbufs(stcb);
7026                                 SCTP_TCB_UNLOCK(stcb);
7027                         }
7028                         SCTP_INP_RUNLOCK(inp);
7029                 }
7030                 SCTP_INP_INFO_RUNLOCK();
7031                 CURVNET_RESTORE();
7032         }
7033         VNET_LIST_RUNLOCK_NOSLEEP();
7034 }
7035
7036 /*
7037  * start a new iterator
7038  * iterates through all endpoints and associations based on the pcb_state
7039  * flags and asoc_state.  "af" (mandatory) is executed for all matching
7040  * assocs and "ef" (optional) is executed when the iterator completes.
7041  * "inpf" (optional) is executed for each new endpoint as it is being
7042  * iterated through. inpe (optional) is called when the inp completes
7043  * its way through all the stcbs.
7044  */
7045 int
7046 sctp_initiate_iterator(inp_func inpf,
7047     asoc_func af,
7048     inp_func inpe,
7049     uint32_t pcb_state,
7050     uint32_t pcb_features,
7051     uint32_t asoc_state,
7052     void *argp,
7053     uint32_t argi,
7054     end_func ef,
7055     struct sctp_inpcb *s_inp,
7056     uint8_t chunk_output_off)
7057 {
7058         struct sctp_iterator *it = NULL;
7059
7060         if (af == NULL) {
7061                 return (-1);
7062         }
7063         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7064                 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7065                     SCTP_BASE_VAR(sctp_pcb_initialized));
7066                 return (-1);
7067         }
7068         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7069             SCTP_M_ITER);
7070         if (it == NULL) {
7071                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7072                 return (ENOMEM);
7073         }
7074         memset(it, 0, sizeof(*it));
7075         it->function_assoc = af;
7076         it->function_inp = inpf;
7077         if (inpf)
7078                 it->done_current_ep = 0;
7079         else
7080                 it->done_current_ep = 1;
7081         it->function_atend = ef;
7082         it->pointer = argp;
7083         it->val = argi;
7084         it->pcb_flags = pcb_state;
7085         it->pcb_features = pcb_features;
7086         it->asoc_state = asoc_state;
7087         it->function_inp_end = inpe;
7088         it->no_chunk_output = chunk_output_off;
7089         it->vn = curvnet;
7090         if (s_inp) {
7091                 /* Assume lock is held here */
7092                 it->inp = s_inp;
7093                 SCTP_INP_INCR_REF(it->inp);
7094                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7095         } else {
7096                 SCTP_INP_INFO_RLOCK();
7097                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7098                 if (it->inp) {
7099                         SCTP_INP_INCR_REF(it->inp);
7100                 }
7101                 SCTP_INP_INFO_RUNLOCK();
7102                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7103
7104         }
7105         SCTP_IPI_ITERATOR_WQ_LOCK();
7106         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7107                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7108                 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7109                     SCTP_BASE_VAR(sctp_pcb_initialized), it);
7110                 SCTP_FREE(it, SCTP_M_ITER);
7111                 return (-1);
7112         }
7113         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7114         if (sctp_it_ctl.iterator_running == 0) {
7115                 sctp_wakeup_iterator();
7116         }
7117         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7118         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7119         return (0);
7120 }