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                                                 /* Update the endpoint
1216                                                  * pointer */
1217                                                 *inp_p = inp;
1218                                                 SCTP_INP_RUNLOCK(inp);
1219                                                 return (stcb);
1220                                         }
1221                                         break;
1222                                 }
1223 #endif
1224 #ifdef INET6
1225                         case AF_INET6:
1226                                 {
1227                                         struct sockaddr_in6 *sin6, *rsin6;
1228
1229                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1230                                         rsin6 = (struct sockaddr_in6 *)from;
1231                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1232                                             rsin6)) {
1233                                                 /* found it */
1234                                                 if (netp != NULL) {
1235                                                         *netp = net;
1236                                                 }
1237                                                 /* Update the endpoint
1238                                                  * pointer */
1239                                                 *inp_p = inp;
1240                                                 SCTP_INP_RUNLOCK(inp);
1241                                                 return (stcb);
1242                                         }
1243                                         break;
1244                                 }
1245 #endif
1246                         default:
1247                                 /* TSNH */
1248                                 break;
1249                         }
1250                 }
1251                 SCTP_TCB_UNLOCK(stcb);
1252                 SCTP_INP_RUNLOCK(inp);
1253         }
1254         return (NULL);
1255 }
1256
1257
1258 /*
1259  * rules for use
1260  *
1261  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1262  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1263  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1264  * NULL.
1265  */
1266
1267 struct sctp_tcb *
1268 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1269     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1270 {
1271         struct sctpasochead *head;
1272         struct sctp_inpcb *inp;
1273         struct sctp_tcb *stcb = NULL;
1274         struct sctp_nets *net;
1275         uint16_t rport;
1276
1277         inp = *inp_p;
1278         switch (remote->sa_family) {
1279 #ifdef INET
1280         case AF_INET:
1281                 rport = (((struct sockaddr_in *)remote)->sin_port);
1282                 break;
1283 #endif
1284 #ifdef INET6
1285         case AF_INET6:
1286                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1287                 break;
1288 #endif
1289         default:
1290                 return (NULL);
1291         }
1292         if (locked_tcb) {
1293                 /*
1294                  * UN-lock so we can do proper locking here this occurs when
1295                  * called from load_addresses_from_init.
1296                  */
1297                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1298                 SCTP_TCB_UNLOCK(locked_tcb);
1299         }
1300         SCTP_INP_INFO_RLOCK();
1301         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1302             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1303                 /*-
1304                  * Now either this guy is our listener or it's the
1305                  * connector. If it is the one that issued the connect, then
1306                  * it's only chance is to be the first TCB in the list. If
1307                  * it is the acceptor, then do the special_lookup to hash
1308                  * and find the real inp.
1309                  */
1310                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1311                         /* to is peer addr, from is my addr */
1312                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1313                             netp, inp->def_vrf_id);
1314                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1315                                 /* we have a locked tcb, lower refcount */
1316                                 SCTP_INP_DECR_REF(inp);
1317                         }
1318                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1319                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1320                                 SCTP_TCB_LOCK(locked_tcb);
1321                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1322                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1323                         }
1324                         SCTP_INP_INFO_RUNLOCK();
1325                         return (stcb);
1326                 } else {
1327                         SCTP_INP_WLOCK(inp);
1328                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1329                                 goto null_return;
1330                         }
1331                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1332                         if (stcb == NULL) {
1333                                 goto null_return;
1334                         }
1335                         SCTP_TCB_LOCK(stcb);
1336
1337                         if (stcb->rport != rport) {
1338                                 /* remote port does not match. */
1339                                 SCTP_TCB_UNLOCK(stcb);
1340                                 goto null_return;
1341                         }
1342                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1343                                 SCTP_TCB_UNLOCK(stcb);
1344                                 goto null_return;
1345                         }
1346                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1347                                 SCTP_TCB_UNLOCK(stcb);
1348                                 goto null_return;
1349                         }
1350                         /* now look at the list of remote addresses */
1351                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1352 #ifdef INVARIANTS
1353                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1354                                         panic("Corrupt net list");
1355                                 }
1356 #endif
1357                                 if (net->ro._l_addr.sa.sa_family !=
1358                                     remote->sa_family) {
1359                                         /* not the same family */
1360                                         continue;
1361                                 }
1362                                 switch (remote->sa_family) {
1363 #ifdef INET
1364                                 case AF_INET:
1365                                         {
1366                                                 struct sockaddr_in *sin,
1367                                                            *rsin;
1368
1369                                                 sin = (struct sockaddr_in *)
1370                                                     &net->ro._l_addr;
1371                                                 rsin = (struct sockaddr_in *)remote;
1372                                                 if (sin->sin_addr.s_addr ==
1373                                                     rsin->sin_addr.s_addr) {
1374                                                         /* found it */
1375                                                         if (netp != NULL) {
1376                                                                 *netp = net;
1377                                                         }
1378                                                         if (locked_tcb == NULL) {
1379                                                                 SCTP_INP_DECR_REF(inp);
1380                                                         } else if (locked_tcb != stcb) {
1381                                                                 SCTP_TCB_LOCK(locked_tcb);
1382                                                         }
1383                                                         if (locked_tcb) {
1384                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1385                                                         }
1386                                                         SCTP_INP_WUNLOCK(inp);
1387                                                         SCTP_INP_INFO_RUNLOCK();
1388                                                         return (stcb);
1389                                                 }
1390                                                 break;
1391                                         }
1392 #endif
1393 #ifdef INET6
1394                                 case AF_INET6:
1395                                         {
1396                                                 struct sockaddr_in6 *sin6,
1397                                                             *rsin6;
1398
1399                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1400                                                 rsin6 = (struct sockaddr_in6 *)remote;
1401                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1402                                                     rsin6)) {
1403                                                         /* found it */
1404                                                         if (netp != NULL) {
1405                                                                 *netp = net;
1406                                                         }
1407                                                         if (locked_tcb == NULL) {
1408                                                                 SCTP_INP_DECR_REF(inp);
1409                                                         } else if (locked_tcb != stcb) {
1410                                                                 SCTP_TCB_LOCK(locked_tcb);
1411                                                         }
1412                                                         if (locked_tcb) {
1413                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1414                                                         }
1415                                                         SCTP_INP_WUNLOCK(inp);
1416                                                         SCTP_INP_INFO_RUNLOCK();
1417                                                         return (stcb);
1418                                                 }
1419                                                 break;
1420                                         }
1421 #endif
1422                                 default:
1423                                         /* TSNH */
1424                                         break;
1425                                 }
1426                         }
1427                         SCTP_TCB_UNLOCK(stcb);
1428                 }
1429         } else {
1430                 SCTP_INP_WLOCK(inp);
1431                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1432                         goto null_return;
1433                 }
1434                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1435                     inp->sctp_hashmark)];
1436                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1437                         if (stcb->rport != rport) {
1438                                 /* remote port does not match */
1439                                 continue;
1440                         }
1441                         SCTP_TCB_LOCK(stcb);
1442                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1443                                 SCTP_TCB_UNLOCK(stcb);
1444                                 continue;
1445                         }
1446                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1447                                 SCTP_TCB_UNLOCK(stcb);
1448                                 continue;
1449                         }
1450                         /* now look at the list of remote addresses */
1451                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1452 #ifdef INVARIANTS
1453                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1454                                         panic("Corrupt net list");
1455                                 }
1456 #endif
1457                                 if (net->ro._l_addr.sa.sa_family !=
1458                                     remote->sa_family) {
1459                                         /* not the same family */
1460                                         continue;
1461                                 }
1462                                 switch (remote->sa_family) {
1463 #ifdef INET
1464                                 case AF_INET:
1465                                         {
1466                                                 struct sockaddr_in *sin,
1467                                                            *rsin;
1468
1469                                                 sin = (struct sockaddr_in *)
1470                                                     &net->ro._l_addr;
1471                                                 rsin = (struct sockaddr_in *)remote;
1472                                                 if (sin->sin_addr.s_addr ==
1473                                                     rsin->sin_addr.s_addr) {
1474                                                         /* found it */
1475                                                         if (netp != NULL) {
1476                                                                 *netp = net;
1477                                                         }
1478                                                         if (locked_tcb == NULL) {
1479                                                                 SCTP_INP_DECR_REF(inp);
1480                                                         } else if (locked_tcb != stcb) {
1481                                                                 SCTP_TCB_LOCK(locked_tcb);
1482                                                         }
1483                                                         if (locked_tcb) {
1484                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1485                                                         }
1486                                                         SCTP_INP_WUNLOCK(inp);
1487                                                         SCTP_INP_INFO_RUNLOCK();
1488                                                         return (stcb);
1489                                                 }
1490                                                 break;
1491                                         }
1492 #endif
1493 #ifdef INET6
1494                                 case AF_INET6:
1495                                         {
1496                                                 struct sockaddr_in6 *sin6,
1497                                                             *rsin6;
1498
1499                                                 sin6 = (struct sockaddr_in6 *)
1500                                                     &net->ro._l_addr;
1501                                                 rsin6 = (struct sockaddr_in6 *)remote;
1502                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1503                                                     rsin6)) {
1504                                                         /* found it */
1505                                                         if (netp != NULL) {
1506                                                                 *netp = net;
1507                                                         }
1508                                                         if (locked_tcb == NULL) {
1509                                                                 SCTP_INP_DECR_REF(inp);
1510                                                         } else if (locked_tcb != stcb) {
1511                                                                 SCTP_TCB_LOCK(locked_tcb);
1512                                                         }
1513                                                         if (locked_tcb) {
1514                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1515                                                         }
1516                                                         SCTP_INP_WUNLOCK(inp);
1517                                                         SCTP_INP_INFO_RUNLOCK();
1518                                                         return (stcb);
1519                                                 }
1520                                                 break;
1521                                         }
1522 #endif
1523                                 default:
1524                                         /* TSNH */
1525                                         break;
1526                                 }
1527                         }
1528                         SCTP_TCB_UNLOCK(stcb);
1529                 }
1530         }
1531 null_return:
1532         /* clean up for returning null */
1533         if (locked_tcb) {
1534                 SCTP_TCB_LOCK(locked_tcb);
1535                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1536         }
1537         SCTP_INP_WUNLOCK(inp);
1538         SCTP_INP_INFO_RUNLOCK();
1539         /* not found */
1540         return (NULL);
1541 }
1542
1543
1544 /*
1545  * Find an association for a specific endpoint using the association id given
1546  * out in the COMM_UP notification
1547  */
1548 struct sctp_tcb *
1549 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1550 {
1551         /*
1552          * Use my the assoc_id to find a endpoint
1553          */
1554         struct sctpasochead *head;
1555         struct sctp_tcb *stcb;
1556         uint32_t id;
1557
1558         if (inp == NULL) {
1559                 SCTP_PRINTF("TSNH ep_associd\n");
1560                 return (NULL);
1561         }
1562         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1563                 SCTP_PRINTF("TSNH ep_associd0\n");
1564                 return (NULL);
1565         }
1566         id = (uint32_t) asoc_id;
1567         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1568         if (head == NULL) {
1569                 /* invalid id TSNH */
1570                 SCTP_PRINTF("TSNH ep_associd1\n");
1571                 return (NULL);
1572         }
1573         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1574                 if (stcb->asoc.assoc_id == id) {
1575                         if (inp != stcb->sctp_ep) {
1576                                 /*
1577                                  * some other guy has the same id active (id
1578                                  * collision ??).
1579                                  */
1580                                 SCTP_PRINTF("TSNH ep_associd2\n");
1581                                 continue;
1582                         }
1583                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1584                                 continue;
1585                         }
1586                         if (want_lock) {
1587                                 SCTP_TCB_LOCK(stcb);
1588                         }
1589                         return (stcb);
1590                 }
1591         }
1592         return (NULL);
1593 }
1594
1595
1596 struct sctp_tcb *
1597 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1598 {
1599         struct sctp_tcb *stcb;
1600
1601         SCTP_INP_RLOCK(inp);
1602         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1603         SCTP_INP_RUNLOCK(inp);
1604         return (stcb);
1605 }
1606
1607
1608 /*
1609  * Endpoint probe expects that the INP_INFO is locked.
1610  */
1611 static struct sctp_inpcb *
1612 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1613     uint16_t lport, uint32_t vrf_id)
1614 {
1615         struct sctp_inpcb *inp;
1616         struct sctp_laddr *laddr;
1617 #ifdef INET
1618         struct sockaddr_in *sin;
1619 #endif
1620 #ifdef INET6
1621         struct sockaddr_in6 *sin6;
1622         struct sockaddr_in6 *intf_addr6;
1623 #endif
1624         int fnd;
1625
1626 #ifdef INET
1627         sin = NULL;
1628 #endif
1629 #ifdef INET6
1630         sin6 = NULL;
1631 #endif
1632         switch (nam->sa_family) {
1633 #ifdef INET
1634         case AF_INET:
1635                 sin = (struct sockaddr_in *)nam;
1636                 break;
1637 #endif
1638 #ifdef INET6
1639         case AF_INET6:
1640                 sin6 = (struct sockaddr_in6 *)nam;
1641                 break;
1642 #endif
1643         default:
1644                 /* unsupported family */
1645                 return (NULL);
1646         }
1647
1648         if (head == NULL)
1649                 return (NULL);
1650
1651         LIST_FOREACH(inp, head, sctp_hash) {
1652                 SCTP_INP_RLOCK(inp);
1653                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1654                         SCTP_INP_RUNLOCK(inp);
1655                         continue;
1656                 }
1657                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1658                     (inp->sctp_lport == lport)) {
1659                         /* got it */
1660                         switch (nam->sa_family) {
1661 #ifdef INET
1662                         case AF_INET:
1663                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1664                                     SCTP_IPV6_V6ONLY(inp)) {
1665                                         /* IPv4 on a IPv6 socket with ONLY
1666                                          * IPv6 set */
1667                                         SCTP_INP_RUNLOCK(inp);
1668                                         continue;
1669                                 }
1670                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1671                                     &sin->sin_addr) != 0) {
1672                                         SCTP_INP_RUNLOCK(inp);
1673                                         continue;
1674                                 }
1675                                 break;
1676 #endif
1677 #ifdef INET6
1678                         case AF_INET6:
1679                                 /* A V6 address and the endpoint is NOT
1680                                  * bound V6 */
1681                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1682                                         SCTP_INP_RUNLOCK(inp);
1683                                         continue;
1684                                 }
1685                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1686                                     &sin6->sin6_addr) != 0) {
1687                                         SCTP_INP_RUNLOCK(inp);
1688                                         continue;
1689                                 }
1690                                 break;
1691 #endif
1692                         default:
1693                                 break;
1694                         }
1695                         /* does a VRF id match? */
1696                         fnd = 0;
1697                         if (inp->def_vrf_id == vrf_id)
1698                                 fnd = 1;
1699
1700                         SCTP_INP_RUNLOCK(inp);
1701                         if (!fnd)
1702                                 continue;
1703                         return (inp);
1704                 }
1705                 SCTP_INP_RUNLOCK(inp);
1706         }
1707         switch (nam->sa_family) {
1708 #ifdef INET
1709         case AF_INET:
1710                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1711                         /* Can't hunt for one that has no address specified */
1712                         return (NULL);
1713                 }
1714                 break;
1715 #endif
1716 #ifdef INET6
1717         case AF_INET6:
1718                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1719                         /* Can't hunt for one that has no address specified */
1720                         return (NULL);
1721                 }
1722                 break;
1723 #endif
1724         default:
1725                 break;
1726         }
1727         /*
1728          * ok, not bound to all so see if we can find a EP bound to this
1729          * address.
1730          */
1731         LIST_FOREACH(inp, head, sctp_hash) {
1732                 SCTP_INP_RLOCK(inp);
1733                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1734                         SCTP_INP_RUNLOCK(inp);
1735                         continue;
1736                 }
1737                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1738                         SCTP_INP_RUNLOCK(inp);
1739                         continue;
1740                 }
1741                 /*
1742                  * Ok this could be a likely candidate, look at all of its
1743                  * addresses
1744                  */
1745                 if (inp->sctp_lport != lport) {
1746                         SCTP_INP_RUNLOCK(inp);
1747                         continue;
1748                 }
1749                 /* does a VRF id match? */
1750                 fnd = 0;
1751                 if (inp->def_vrf_id == vrf_id)
1752                         fnd = 1;
1753
1754                 if (!fnd) {
1755                         SCTP_INP_RUNLOCK(inp);
1756                         continue;
1757                 }
1758                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1759                         if (laddr->ifa == NULL) {
1760                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1761                                     __func__);
1762                                 continue;
1763                         }
1764                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1765                             (void *)laddr->ifa);
1766                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1767                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1768                                 continue;
1769                         }
1770                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1771                                 /* possible, see if it matches */
1772                                 switch (nam->sa_family) {
1773 #ifdef INET
1774                                 case AF_INET:
1775                                         if (sin->sin_addr.s_addr ==
1776                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1777                                                 SCTP_INP_RUNLOCK(inp);
1778                                                 return (inp);
1779                                         }
1780                                         break;
1781 #endif
1782 #ifdef INET6
1783                                 case AF_INET6:
1784                                         intf_addr6 = &laddr->ifa->address.sin6;
1785                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1786                                             intf_addr6)) {
1787                                                 SCTP_INP_RUNLOCK(inp);
1788                                                 return (inp);
1789                                         }
1790                                         break;
1791 #endif
1792                                 }
1793                         }
1794                 }
1795                 SCTP_INP_RUNLOCK(inp);
1796         }
1797         return (NULL);
1798 }
1799
1800
1801 static struct sctp_inpcb *
1802 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1803 {
1804         struct sctppcbhead *head;
1805         struct sctp_inpcb *t_inp;
1806         int fnd;
1807
1808         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1809             SCTP_BASE_INFO(hashmark))];
1810         LIST_FOREACH(t_inp, head, sctp_hash) {
1811                 if (t_inp->sctp_lport != lport) {
1812                         continue;
1813                 }
1814                 /* is it in the VRF in question */
1815                 fnd = 0;
1816                 if (t_inp->def_vrf_id == vrf_id)
1817                         fnd = 1;
1818                 if (!fnd)
1819                         continue;
1820
1821                 /* This one is in use. */
1822                 /* check the v6/v4 binding issue */
1823                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1824                     SCTP_IPV6_V6ONLY(t_inp)) {
1825                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1826                                 /* collision in V6 space */
1827                                 return (t_inp);
1828                         } else {
1829                                 /* inp is BOUND_V4 no conflict */
1830                                 continue;
1831                         }
1832                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1833                         /* t_inp is bound v4 and v6, conflict always */
1834                         return (t_inp);
1835                 } else {
1836                         /* t_inp is bound only V4 */
1837                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1838                             SCTP_IPV6_V6ONLY(inp)) {
1839                                 /* no conflict */
1840                                 continue;
1841                         }
1842                         /* else fall through to conflict */
1843                 }
1844                 return (t_inp);
1845         }
1846         return (NULL);
1847 }
1848
1849
1850 int
1851 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1852 {
1853         /* For 1-2-1 with port reuse */
1854         struct sctppcbhead *head;
1855         struct sctp_inpcb *tinp, *ninp;
1856
1857         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1858                 /* only works with port reuse on */
1859                 return (-1);
1860         }
1861         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1862                 return (0);
1863         }
1864         SCTP_INP_RUNLOCK(inp);
1865         SCTP_INP_INFO_WLOCK();
1866         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1867             SCTP_BASE_INFO(hashmark))];
1868         /* Kick out all non-listeners to the TCP hash */
1869         LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1870                 if (tinp->sctp_lport != inp->sctp_lport) {
1871                         continue;
1872                 }
1873                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1874                         continue;
1875                 }
1876                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1877                         continue;
1878                 }
1879                 if (tinp->sctp_socket->so_qlimit) {
1880                         continue;
1881                 }
1882                 SCTP_INP_WLOCK(tinp);
1883                 LIST_REMOVE(tinp, sctp_hash);
1884                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1885                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1886                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1887                 SCTP_INP_WUNLOCK(tinp);
1888         }
1889         SCTP_INP_WLOCK(inp);
1890         /* Pull from where he was */
1891         LIST_REMOVE(inp, sctp_hash);
1892         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1893         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1894         LIST_INSERT_HEAD(head, inp, sctp_hash);
1895         SCTP_INP_WUNLOCK(inp);
1896         SCTP_INP_RLOCK(inp);
1897         SCTP_INP_INFO_WUNLOCK();
1898         return (0);
1899 }
1900
1901
1902 struct sctp_inpcb *
1903 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1904     uint32_t vrf_id)
1905 {
1906         /*
1907          * First we check the hash table to see if someone has this port
1908          * bound with just the port.
1909          */
1910         struct sctp_inpcb *inp;
1911         struct sctppcbhead *head;
1912         int lport;
1913         unsigned int i;
1914 #ifdef INET
1915         struct sockaddr_in *sin;
1916 #endif
1917 #ifdef INET6
1918         struct sockaddr_in6 *sin6;
1919 #endif
1920
1921         switch (nam->sa_family) {
1922 #ifdef INET
1923         case AF_INET:
1924                 sin = (struct sockaddr_in *)nam;
1925                 lport = sin->sin_port;
1926                 break;
1927 #endif
1928 #ifdef INET6
1929         case AF_INET6:
1930                 sin6 = (struct sockaddr_in6 *)nam;
1931                 lport = sin6->sin6_port;
1932                 break;
1933 #endif
1934         default:
1935                 return (NULL);
1936         }
1937         /*
1938          * I could cheat here and just cast to one of the types but we will
1939          * do it right. It also provides the check against an Unsupported
1940          * type too.
1941          */
1942         /* Find the head of the ALLADDR chain */
1943         if (have_lock == 0) {
1944                 SCTP_INP_INFO_RLOCK();
1945         }
1946         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1947             SCTP_BASE_INFO(hashmark))];
1948         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1949
1950         /*
1951          * If the TCP model exists it could be that the main listening
1952          * endpoint is gone but there still exists a connected socket for
1953          * this guy. If so we can return the first one that we find. This
1954          * may NOT be the correct one so the caller should be wary on the
1955          * returned INP. Currently the only caller that sets find_tcp_pool
1956          * is in bindx where we are verifying that a user CAN bind the
1957          * address. He either has bound it already, or someone else has, or
1958          * its open to bind, so this is good enough.
1959          */
1960         if (inp == NULL && find_tcp_pool) {
1961                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1962                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1963                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1964                         if (inp) {
1965                                 break;
1966                         }
1967                 }
1968         }
1969         if (inp) {
1970                 SCTP_INP_INCR_REF(inp);
1971         }
1972         if (have_lock == 0) {
1973                 SCTP_INP_INFO_RUNLOCK();
1974         }
1975         return (inp);
1976 }
1977
1978
1979 /*
1980  * Find an association for an endpoint with the pointer to whom you want to
1981  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1982  * need to change the *to to some other struct like a mbuf...
1983  */
1984 struct sctp_tcb *
1985 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
1986     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1987     uint32_t vrf_id)
1988 {
1989         struct sctp_inpcb *inp = NULL;
1990         struct sctp_tcb *stcb;
1991
1992         SCTP_INP_INFO_RLOCK();
1993         if (find_tcp_pool) {
1994                 if (inp_p != NULL) {
1995                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
1996                             vrf_id);
1997                 } else {
1998                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
1999                             vrf_id);
2000                 }
2001                 if (stcb != NULL) {
2002                         SCTP_INP_INFO_RUNLOCK();
2003                         return (stcb);
2004                 }
2005         }
2006         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2007         if (inp_p != NULL) {
2008                 *inp_p = inp;
2009         }
2010         SCTP_INP_INFO_RUNLOCK();
2011         if (inp == NULL) {
2012                 return (NULL);
2013         }
2014         /*
2015          * ok, we have an endpoint, now lets find the assoc for it (if any)
2016          * we now place the source address or from in the to of the find
2017          * endpoint call. Since in reality this chain is used from the
2018          * inbound packet side.
2019          */
2020         if (inp_p != NULL) {
2021                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2022                     NULL);
2023         } else {
2024                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2025                     NULL);
2026         }
2027         return (stcb);
2028 }
2029
2030
2031 /*
2032  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2033  * find all addresses that the sender has specified in any address list. Each
2034  * address will be used to lookup the TCB and see if one exits.
2035  */
2036 static struct sctp_tcb *
2037 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2038     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2039     struct sockaddr *dst)
2040 {
2041         struct sctp_paramhdr *phdr, parm_buf;
2042 #if defined(INET) || defined(INET6)
2043         struct sctp_tcb *stcb;
2044         uint16_t ptype;
2045 #endif
2046         uint16_t plen;
2047 #ifdef INET
2048         struct sockaddr_in sin4;
2049 #endif
2050 #ifdef INET6
2051         struct sockaddr_in6 sin6;
2052 #endif
2053
2054 #ifdef INET
2055         memset(&sin4, 0, sizeof(sin4));
2056         sin4.sin_len = sizeof(sin4);
2057         sin4.sin_family = AF_INET;
2058         sin4.sin_port = sh->src_port;
2059 #endif
2060 #ifdef INET6
2061         memset(&sin6, 0, sizeof(sin6));
2062         sin6.sin6_len = sizeof(sin6);
2063         sin6.sin6_family = AF_INET6;
2064         sin6.sin6_port = sh->src_port;
2065 #endif
2066
2067         offset += sizeof(struct sctp_init_chunk);
2068
2069         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
2070         while (phdr != NULL) {
2071                 /* now we must see if we want the parameter */
2072 #if defined(INET) || defined(INET6)
2073                 ptype = ntohs(phdr->param_type);
2074 #endif
2075                 plen = ntohs(phdr->param_length);
2076                 if (plen == 0) {
2077                         break;
2078                 }
2079 #ifdef INET
2080                 if (ptype == SCTP_IPV4_ADDRESS &&
2081                     plen == sizeof(struct sctp_ipv4addr_param)) {
2082                         /* Get the rest of the address */
2083                         struct sctp_ipv4addr_param ip4_parm, *p4;
2084
2085                         phdr = sctp_get_next_param(m, offset,
2086                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2087                         if (phdr == NULL) {
2088                                 return (NULL);
2089                         }
2090                         p4 = (struct sctp_ipv4addr_param *)phdr;
2091                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2092                         /* look it up */
2093                         stcb = sctp_findassociation_ep_addr(inp_p,
2094                             (struct sockaddr *)&sin4, netp, dst, NULL);
2095                         if (stcb != NULL) {
2096                                 return (stcb);
2097                         }
2098                 }
2099 #endif
2100 #ifdef INET6
2101                 if (ptype == SCTP_IPV6_ADDRESS &&
2102                     plen == sizeof(struct sctp_ipv6addr_param)) {
2103                         /* Get the rest of the address */
2104                         struct sctp_ipv6addr_param ip6_parm, *p6;
2105
2106                         phdr = sctp_get_next_param(m, offset,
2107                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
2108                         if (phdr == NULL) {
2109                                 return (NULL);
2110                         }
2111                         p6 = (struct sctp_ipv6addr_param *)phdr;
2112                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2113                         /* look it up */
2114                         stcb = sctp_findassociation_ep_addr(inp_p,
2115                             (struct sockaddr *)&sin6, netp, dst, NULL);
2116                         if (stcb != NULL) {
2117                                 return (stcb);
2118                         }
2119                 }
2120 #endif
2121                 offset += SCTP_SIZE32(plen);
2122                 phdr = sctp_get_next_param(m, offset, &parm_buf,
2123                     sizeof(parm_buf));
2124         }
2125         return (NULL);
2126 }
2127
2128 static struct sctp_tcb *
2129 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2130     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2131     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2132 {
2133         /*
2134          * Use my vtag to hash. If we find it we then verify the source addr
2135          * is in the assoc. If all goes well we save a bit on rec of a
2136          * packet.
2137          */
2138         struct sctpasochead *head;
2139         struct sctp_nets *net;
2140         struct sctp_tcb *stcb;
2141
2142         SCTP_INP_INFO_RLOCK();
2143         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2144             SCTP_BASE_INFO(hashasocmark))];
2145         LIST_FOREACH(stcb, head, sctp_asocs) {
2146                 SCTP_INP_RLOCK(stcb->sctp_ep);
2147                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2148                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2149                         continue;
2150                 }
2151                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2152                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2153                         continue;
2154                 }
2155                 SCTP_TCB_LOCK(stcb);
2156                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2157                 if (stcb->asoc.my_vtag == vtag) {
2158                         /* candidate */
2159                         if (stcb->rport != rport) {
2160                                 SCTP_TCB_UNLOCK(stcb);
2161                                 continue;
2162                         }
2163                         if (stcb->sctp_ep->sctp_lport != lport) {
2164                                 SCTP_TCB_UNLOCK(stcb);
2165                                 continue;
2166                         }
2167                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2168                                 SCTP_TCB_UNLOCK(stcb);
2169                                 continue;
2170                         }
2171                         /* RRS:Need toaddr check here */
2172                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2173                                 /* Endpoint does not own this address */
2174                                 SCTP_TCB_UNLOCK(stcb);
2175                                 continue;
2176                         }
2177                         if (remote_tag) {
2178                                 /* If we have both vtags that's all we match
2179                                  * on */
2180                                 if (stcb->asoc.peer_vtag == remote_tag) {
2181                                         /*
2182                                          * If both tags match we consider it
2183                                          * conclusive and check NO
2184                                          * source/destination addresses
2185                                          */
2186                                         goto conclusive;
2187                                 }
2188                         }
2189                         if (skip_src_check) {
2190                 conclusive:
2191                                 if (from) {
2192                                         *netp = sctp_findnet(stcb, from);
2193                                 } else {
2194                                         *netp = NULL;   /* unknown */
2195                                 }
2196                                 if (inp_p)
2197                                         *inp_p = stcb->sctp_ep;
2198                                 SCTP_INP_INFO_RUNLOCK();
2199                                 return (stcb);
2200                         }
2201                         net = sctp_findnet(stcb, from);
2202                         if (net) {
2203                                 /* yep its him. */
2204                                 *netp = net;
2205                                 SCTP_STAT_INCR(sctps_vtagexpress);
2206                                 *inp_p = stcb->sctp_ep;
2207                                 SCTP_INP_INFO_RUNLOCK();
2208                                 return (stcb);
2209                         } else {
2210                                 /*
2211                                  * not him, this should only happen in rare
2212                                  * cases so I peg it.
2213                                  */
2214                                 SCTP_STAT_INCR(sctps_vtagbogus);
2215                         }
2216                 }
2217                 SCTP_TCB_UNLOCK(stcb);
2218         }
2219         SCTP_INP_INFO_RUNLOCK();
2220         return (NULL);
2221 }
2222
2223
2224 /*
2225  * Find an association with the pointer to the inbound IP packet. This can be
2226  * a IPv4 or IPv6 packet.
2227  */
2228 struct sctp_tcb *
2229 sctp_findassociation_addr(struct mbuf *m, int offset,
2230     struct sockaddr *src, struct sockaddr *dst,
2231     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2232     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2233 {
2234         struct sctp_tcb *stcb;
2235         struct sctp_inpcb *inp;
2236
2237         if (sh->v_tag) {
2238                 /* we only go down this path if vtag is non-zero */
2239                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2240                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2241                 if (stcb) {
2242                         return (stcb);
2243                 }
2244         }
2245         if (inp_p) {
2246                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2247                     1, vrf_id);
2248                 inp = *inp_p;
2249         } else {
2250                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2251                     1, vrf_id);
2252         }
2253         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2254         if (stcb == NULL && inp) {
2255                 /* Found a EP but not this address */
2256                 if ((ch->chunk_type == SCTP_INITIATION) ||
2257                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2258                         /*-
2259                          * special hook, we do NOT return linp or an
2260                          * association that is linked to an existing
2261                          * association that is under the TCP pool (i.e. no
2262                          * listener exists). The endpoint finding routine
2263                          * will always find a listener before examining the
2264                          * TCP pool.
2265                          */
2266                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2267                                 if (inp_p) {
2268                                         *inp_p = NULL;
2269                                 }
2270                                 return (NULL);
2271                         }
2272                         stcb = sctp_findassociation_special_addr(m,
2273                             offset, sh, &inp, netp, dst);
2274                         if (inp_p != NULL) {
2275                                 *inp_p = inp;
2276                         }
2277                 }
2278         }
2279         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2280         return (stcb);
2281 }
2282
2283 /*
2284  * lookup an association by an ASCONF lookup address.
2285  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2286  */
2287 struct sctp_tcb *
2288 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2289     struct sockaddr *dst, struct sctphdr *sh,
2290     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2291 {
2292         struct sctp_tcb *stcb;
2293         union sctp_sockstore remote_store;
2294         struct sctp_paramhdr parm_buf, *phdr;
2295         int ptype;
2296         int zero_address = 0;
2297 #ifdef INET
2298         struct sockaddr_in *sin;
2299 #endif
2300 #ifdef INET6
2301         struct sockaddr_in6 *sin6;
2302 #endif
2303
2304         memset(&remote_store, 0, sizeof(remote_store));
2305         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2306             &parm_buf, sizeof(struct sctp_paramhdr));
2307         if (phdr == NULL) {
2308                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2309                     __func__);
2310                 return NULL;
2311         }
2312         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2313         /* get the correlation address */
2314         switch (ptype) {
2315 #ifdef INET6
2316         case SCTP_IPV6_ADDRESS:
2317                 {
2318                         /* ipv6 address param */
2319                         struct sctp_ipv6addr_param *p6, p6_buf;
2320
2321                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2322                                 return NULL;
2323                         }
2324                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2325                             offset + sizeof(struct sctp_asconf_chunk),
2326                             &p6_buf.ph, sizeof(*p6));
2327                         if (p6 == NULL) {
2328                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2329                                     __func__);
2330                                 return (NULL);
2331                         }
2332                         sin6 = &remote_store.sin6;
2333                         sin6->sin6_family = AF_INET6;
2334                         sin6->sin6_len = sizeof(*sin6);
2335                         sin6->sin6_port = sh->src_port;
2336                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2337                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2338                                 zero_address = 1;
2339                         break;
2340                 }
2341 #endif
2342 #ifdef INET
2343         case SCTP_IPV4_ADDRESS:
2344                 {
2345                         /* ipv4 address param */
2346                         struct sctp_ipv4addr_param *p4, p4_buf;
2347
2348                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2349                                 return NULL;
2350                         }
2351                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2352                             offset + sizeof(struct sctp_asconf_chunk),
2353                             &p4_buf.ph, sizeof(*p4));
2354                         if (p4 == NULL) {
2355                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2356                                     __func__);
2357                                 return (NULL);
2358                         }
2359                         sin = &remote_store.sin;
2360                         sin->sin_family = AF_INET;
2361                         sin->sin_len = sizeof(*sin);
2362                         sin->sin_port = sh->src_port;
2363                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2364                         if (sin->sin_addr.s_addr == INADDR_ANY)
2365                                 zero_address = 1;
2366                         break;
2367                 }
2368 #endif
2369         default:
2370                 /* invalid address param type */
2371                 return NULL;
2372         }
2373
2374         if (zero_address) {
2375                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2376                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2377                 if (stcb != NULL) {
2378                         SCTP_INP_DECR_REF(*inp_p);
2379                 }
2380         } else {
2381                 stcb = sctp_findassociation_ep_addr(inp_p,
2382                     &remote_store.sa, netp,
2383                     dst, NULL);
2384         }
2385         return (stcb);
2386 }
2387
2388
2389 /*
2390  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2391  * addresses. This way if we don't get a bind we by default pick a ephemeral
2392  * port with all addresses bound.
2393  */
2394 int
2395 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2396 {
2397         /*
2398          * we get called when a new endpoint starts up. We need to allocate
2399          * the sctp_inpcb structure from the zone and init it. Mark it as
2400          * unbound and find a port that we can use as an ephemeral with
2401          * INADDR_ANY. If the user binds later no problem we can then add in
2402          * the specific addresses. And setup the default parameters for the
2403          * EP.
2404          */
2405         int i, error;
2406         struct sctp_inpcb *inp;
2407         struct sctp_pcb *m;
2408         struct timeval time;
2409         sctp_sharedkey_t *null_key;
2410
2411         error = 0;
2412
2413         SCTP_INP_INFO_WLOCK();
2414         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2415         if (inp == NULL) {
2416                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2417                 SCTP_INP_INFO_WUNLOCK();
2418                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2419                 return (ENOBUFS);
2420         }
2421         /* zap it */
2422         bzero(inp, sizeof(*inp));
2423
2424         /* bump generations */
2425         /* setup socket pointers */
2426         inp->sctp_socket = so;
2427         inp->ip_inp.inp.inp_socket = so;
2428         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2429 #ifdef INET6
2430         if (INP_SOCKAF(so) == AF_INET6) {
2431                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2432                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2433                 }
2434                 if (MODULE_GLOBAL(ip6_v6only)) {
2435                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2436                 }
2437         }
2438 #endif
2439         inp->sctp_associd_counter = 1;
2440         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2441         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2442         inp->max_cwnd = 0;
2443         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2444         inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable);
2445         inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable);
2446         inp->auth_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_auth_enable);
2447         inp->asconf_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_asconf_enable);
2448         inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2449         inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2450         inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2451         inp->idata_supported = 0;
2452
2453         inp->fibnum = so->so_fibnum;
2454         /* init the small hash table we use to track asocid <-> tcb */
2455         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2456         if (inp->sctp_asocidhash == NULL) {
2457                 crfree(inp->ip_inp.inp.inp_cred);
2458                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2459                 SCTP_INP_INFO_WUNLOCK();
2460                 return (ENOBUFS);
2461         }
2462 #ifdef IPSEC
2463         error = ipsec_init_policy(so, &inp->ip_inp.inp.inp_sp);
2464         if (error != 0) {
2465                 crfree(inp->ip_inp.inp.inp_cred);
2466                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2467                 SCTP_INP_INFO_WUNLOCK();
2468                 return error;
2469         }
2470 #endif                          /* IPSEC */
2471         SCTP_INCR_EP_COUNT();
2472         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2473         SCTP_INP_INFO_WUNLOCK();
2474
2475         so->so_pcb = (caddr_t)inp;
2476
2477         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2478                 /* UDP style socket */
2479                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2480                     SCTP_PCB_FLAGS_UNBOUND);
2481                 /* Be sure it is NON-BLOCKING IO for UDP */
2482                 /* SCTP_SET_SO_NBIO(so); */
2483         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2484                 /* TCP style socket */
2485                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2486                     SCTP_PCB_FLAGS_UNBOUND);
2487                 /* Be sure we have blocking IO by default */
2488                 SCTP_CLEAR_SO_NBIO(so);
2489         } else {
2490                 /*
2491                  * unsupported socket type (RAW, etc)- in case we missed it
2492                  * in protosw
2493                  */
2494                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2495                 so->so_pcb = NULL;
2496                 crfree(inp->ip_inp.inp.inp_cred);
2497 #ifdef IPSEC
2498                 ipsec_delete_pcbpolicy(&inp->ip_inp.inp);
2499 #endif
2500                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2501                 return (EOPNOTSUPP);
2502         }
2503         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2504                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2505                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2506         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2507                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2508                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2509         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2510                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2511                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2512         }
2513         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2514             &inp->sctp_hashmark);
2515         if (inp->sctp_tcbhash == NULL) {
2516                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2517                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2518                 so->so_pcb = NULL;
2519                 crfree(inp->ip_inp.inp.inp_cred);
2520 #ifdef IPSEC
2521                 ipsec_delete_pcbpolicy(&inp->ip_inp.inp);
2522 #endif
2523                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2524                 return (ENOBUFS);
2525         }
2526         inp->def_vrf_id = vrf_id;
2527
2528         SCTP_INP_INFO_WLOCK();
2529         SCTP_INP_LOCK_INIT(inp);
2530         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2531         SCTP_INP_READ_INIT(inp);
2532         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2533         /* lock the new ep */
2534         SCTP_INP_WLOCK(inp);
2535
2536         /* add it to the info area */
2537         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2538         SCTP_INP_INFO_WUNLOCK();
2539
2540         TAILQ_INIT(&inp->read_queue);
2541         LIST_INIT(&inp->sctp_addr_list);
2542
2543         LIST_INIT(&inp->sctp_asoc_list);
2544
2545 #ifdef SCTP_TRACK_FREED_ASOCS
2546         /* TEMP CODE */
2547         LIST_INIT(&inp->sctp_asoc_free_list);
2548 #endif
2549         /* Init the timer structure for signature change */
2550         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2551         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2552
2553         /* now init the actual endpoint default data */
2554         m = &inp->sctp_ep;
2555
2556         /* setup the base timeout information */
2557         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2558         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2559         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2560         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2561         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2562         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2563         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2564         /* all max/min max are in ms */
2565         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2566         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2567         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2568         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2569         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2570         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2571         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2572         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2573         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2574         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2575         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2576         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2577         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2578
2579         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2580         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2581         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2582         /* number of streams to pre-open on a association */
2583         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2584
2585         /* Add adaptation cookie */
2586         m->adaptation_layer_indicator = 0;
2587         m->adaptation_layer_indicator_provided = 0;
2588
2589         /* seed random number generator */
2590         m->random_counter = 1;
2591         m->store_at = SCTP_SIGNATURE_SIZE;
2592         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2593         sctp_fill_random_store(m);
2594
2595         /* Minimum cookie size */
2596         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2597             sizeof(struct sctp_state_cookie);
2598         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2599
2600         /* Setup the initial secret */
2601         (void)SCTP_GETTIME_TIMEVAL(&time);
2602         m->time_of_secret_change = time.tv_sec;
2603
2604         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2605                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2606         }
2607         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2608
2609         /* How long is a cookie good for ? */
2610         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2611         /*
2612          * Initialize authentication parameters
2613          */
2614         m->local_hmacs = sctp_default_supported_hmaclist();
2615         m->local_auth_chunks = sctp_alloc_chunklist();
2616         if (inp->asconf_supported) {
2617                 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2618                 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2619         }
2620         m->default_dscp = 0;
2621 #ifdef INET6
2622         m->default_flowlabel = 0;
2623 #endif
2624         m->port = 0;            /* encapsulation disabled by default */
2625         LIST_INIT(&m->shared_keys);
2626         /* add default NULL key as key id 0 */
2627         null_key = sctp_alloc_sharedkey();
2628         sctp_insert_sharedkey(&m->shared_keys, null_key);
2629         SCTP_INP_WUNLOCK(inp);
2630 #ifdef SCTP_LOG_CLOSING
2631         sctp_log_closing(inp, NULL, 12);
2632 #endif
2633         return (error);
2634 }
2635
2636
2637 void
2638 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2639     struct sctp_tcb *stcb)
2640 {
2641         struct sctp_nets *net;
2642         uint16_t lport, rport;
2643         struct sctppcbhead *head;
2644         struct sctp_laddr *laddr, *oladdr;
2645
2646         atomic_add_int(&stcb->asoc.refcnt, 1);
2647         SCTP_TCB_UNLOCK(stcb);
2648         SCTP_INP_INFO_WLOCK();
2649         SCTP_INP_WLOCK(old_inp);
2650         SCTP_INP_WLOCK(new_inp);
2651         SCTP_TCB_LOCK(stcb);
2652         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2653
2654         new_inp->sctp_ep.time_of_secret_change =
2655             old_inp->sctp_ep.time_of_secret_change;
2656         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2657             sizeof(old_inp->sctp_ep.secret_key));
2658         new_inp->sctp_ep.current_secret_number =
2659             old_inp->sctp_ep.current_secret_number;
2660         new_inp->sctp_ep.last_secret_number =
2661             old_inp->sctp_ep.last_secret_number;
2662         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2663
2664         /* make it so new data pours into the new socket */
2665         stcb->sctp_socket = new_inp->sctp_socket;
2666         stcb->sctp_ep = new_inp;
2667
2668         /* Copy the port across */
2669         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2670         rport = stcb->rport;
2671         /* Pull the tcb from the old association */
2672         LIST_REMOVE(stcb, sctp_tcbhash);
2673         LIST_REMOVE(stcb, sctp_tcblist);
2674         if (stcb->asoc.in_asocid_hash) {
2675                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2676         }
2677         /* Now insert the new_inp into the TCP connected hash */
2678         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2679
2680         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2681         /* Its safe to access */
2682         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2683
2684         /* Now move the tcb into the endpoint list */
2685         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2686         /*
2687          * Question, do we even need to worry about the ep-hash since we
2688          * only have one connection? Probably not :> so lets get rid of it
2689          * and not suck up any kernel memory in that.
2690          */
2691         if (stcb->asoc.in_asocid_hash) {
2692                 struct sctpasochead *lhd;
2693
2694                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2695                     new_inp->hashasocidmark)];
2696                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2697         }
2698         /* Ok. Let's restart timer. */
2699         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2700                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2701                     stcb, net);
2702         }
2703
2704         SCTP_INP_INFO_WUNLOCK();
2705         if (new_inp->sctp_tcbhash != NULL) {
2706                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2707                 new_inp->sctp_tcbhash = NULL;
2708         }
2709         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2710                 /* Subset bound, so copy in the laddr list from the old_inp */
2711                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2712                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2713                         if (laddr == NULL) {
2714                                 /*
2715                                  * Gak, what can we do? This assoc is really
2716                                  * HOSED. We probably should send an abort
2717                                  * here.
2718                                  */
2719                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2720                                 continue;
2721                         }
2722                         SCTP_INCR_LADDR_COUNT();
2723                         bzero(laddr, sizeof(*laddr));
2724                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2725                         laddr->ifa = oladdr->ifa;
2726                         atomic_add_int(&laddr->ifa->refcount, 1);
2727                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2728                             sctp_nxt_addr);
2729                         new_inp->laddr_count++;
2730                         if (oladdr == stcb->asoc.last_used_address) {
2731                                 stcb->asoc.last_used_address = laddr;
2732                         }
2733                 }
2734         }
2735         /*
2736          * Now any running timers need to be adjusted since we really don't
2737          * care if they are running or not just blast in the new_inp into
2738          * all of them.
2739          */
2740
2741         stcb->asoc.dack_timer.ep = (void *)new_inp;
2742         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2743         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2744         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2745         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2746         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2747         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2748         /* now what about the nets? */
2749         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2750                 net->pmtu_timer.ep = (void *)new_inp;
2751                 net->hb_timer.ep = (void *)new_inp;
2752                 net->rxt_timer.ep = (void *)new_inp;
2753         }
2754         SCTP_INP_WUNLOCK(new_inp);
2755         SCTP_INP_WUNLOCK(old_inp);
2756 }
2757
2758 /*
2759  * insert an laddr entry with the given ifa for the desired list
2760  */
2761 static int
2762 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2763 {
2764         struct sctp_laddr *laddr;
2765
2766         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2767         if (laddr == NULL) {
2768                 /* out of memory? */
2769                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2770                 return (EINVAL);
2771         }
2772         SCTP_INCR_LADDR_COUNT();
2773         bzero(laddr, sizeof(*laddr));
2774         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2775         laddr->ifa = ifa;
2776         laddr->action = act;
2777         atomic_add_int(&ifa->refcount, 1);
2778         /* insert it */
2779         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2780
2781         return (0);
2782 }
2783
2784 /*
2785  * Remove an laddr entry from the local address list (on an assoc)
2786  */
2787 static void
2788 sctp_remove_laddr(struct sctp_laddr *laddr)
2789 {
2790
2791         /* remove from the list */
2792         LIST_REMOVE(laddr, sctp_nxt_addr);
2793         sctp_free_ifa(laddr->ifa);
2794         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2795         SCTP_DECR_LADDR_COUNT();
2796 }
2797
2798
2799
2800 /* sctp_ifap is used to bypass normal local address validation checks */
2801 int
2802 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2803     struct sctp_ifa *sctp_ifap, struct thread *p)
2804 {
2805         /* bind a ep to a socket address */
2806         struct sctppcbhead *head;
2807         struct sctp_inpcb *inp, *inp_tmp;
2808         struct inpcb *ip_inp;
2809         int port_reuse_active = 0;
2810         int bindall;
2811         uint16_t lport;
2812         int error;
2813         uint32_t vrf_id;
2814
2815         lport = 0;
2816         bindall = 1;
2817         inp = (struct sctp_inpcb *)so->so_pcb;
2818         ip_inp = (struct inpcb *)so->so_pcb;
2819 #ifdef SCTP_DEBUG
2820         if (addr) {
2821                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2822                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2823                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2824                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2825         }
2826 #endif
2827         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2828                 /* already did a bind, subsequent binds NOT allowed ! */
2829                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2830                 return (EINVAL);
2831         }
2832 #ifdef INVARIANTS
2833         if (p == NULL)
2834                 panic("null proc/thread");
2835 #endif
2836         if (addr != NULL) {
2837                 switch (addr->sa_family) {
2838 #ifdef INET
2839                 case AF_INET:
2840                         {
2841                                 struct sockaddr_in *sin;
2842
2843                                 /* IPV6_V6ONLY socket? */
2844                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2845                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2846                                         return (EINVAL);
2847                                 }
2848                                 if (addr->sa_len != sizeof(*sin)) {
2849                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2850                                         return (EINVAL);
2851                                 }
2852                                 sin = (struct sockaddr_in *)addr;
2853                                 lport = sin->sin_port;
2854                                 /*
2855                                  * For LOOPBACK the prison_local_ip4() call
2856                                  * will transmute the ip address to the
2857                                  * proper value.
2858                                  */
2859                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2860                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2861                                         return (error);
2862                                 }
2863                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2864                                         bindall = 0;
2865                                 }
2866                                 break;
2867                         }
2868 #endif
2869 #ifdef INET6
2870                 case AF_INET6:
2871                         {
2872                                 /* Only for pure IPv6 Address. (No IPv4
2873                                  * Mapped!) */
2874                                 struct sockaddr_in6 *sin6;
2875
2876                                 sin6 = (struct sockaddr_in6 *)addr;
2877
2878                                 if (addr->sa_len != sizeof(*sin6)) {
2879                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2880                                         return (EINVAL);
2881                                 }
2882                                 lport = sin6->sin6_port;
2883                                 /*
2884                                  * For LOOPBACK the prison_local_ip6() call
2885                                  * will transmute the ipv6 address to the
2886                                  * proper value.
2887                                  */
2888                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2889                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2890                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2891                                         return (error);
2892                                 }
2893                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2894                                         bindall = 0;
2895                                         /* KAME hack: embed scopeid */
2896                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2897                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2898                                                 return (EINVAL);
2899                                         }
2900                                 }
2901                                 /* this must be cleared for ifa_ifwithaddr() */
2902                                 sin6->sin6_scope_id = 0;
2903                                 break;
2904                         }
2905 #endif
2906                 default:
2907                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2908                         return (EAFNOSUPPORT);
2909                 }
2910         }
2911         SCTP_INP_INFO_WLOCK();
2912         SCTP_INP_WLOCK(inp);
2913         /* Setup a vrf_id to be the default for the non-bind-all case. */
2914         vrf_id = inp->def_vrf_id;
2915
2916         /* increase our count due to the unlock we do */
2917         SCTP_INP_INCR_REF(inp);
2918         if (lport) {
2919                 /*
2920                  * Did the caller specify a port? if so we must see if an ep
2921                  * already has this one bound.
2922                  */
2923                 /* got to be root to get at low ports */
2924                 if (ntohs(lport) < IPPORT_RESERVED) {
2925                         if (p && (error =
2926                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2927                             )) {
2928                                 SCTP_INP_DECR_REF(inp);
2929                                 SCTP_INP_WUNLOCK(inp);
2930                                 SCTP_INP_INFO_WUNLOCK();
2931                                 return (error);
2932                         }
2933                 }
2934                 SCTP_INP_WUNLOCK(inp);
2935                 if (bindall) {
2936                         vrf_id = inp->def_vrf_id;
2937                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2938                         if (inp_tmp != NULL) {
2939                                 /*
2940                                  * lock guy returned and lower count note
2941                                  * that we are not bound so inp_tmp should
2942                                  * NEVER be inp. And it is this inp
2943                                  * (inp_tmp) that gets the reference bump,
2944                                  * so we must lower it.
2945                                  */
2946                                 SCTP_INP_DECR_REF(inp_tmp);
2947                                 /* unlock info */
2948                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2949                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2950                                         /* Ok, must be one-2-one and
2951                                          * allowing port re-use */
2952                                         port_reuse_active = 1;
2953                                         goto continue_anyway;
2954                                 }
2955                                 SCTP_INP_DECR_REF(inp);
2956                                 SCTP_INP_INFO_WUNLOCK();
2957                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2958                                 return (EADDRINUSE);
2959                         }
2960                 } else {
2961                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2962                         if (inp_tmp != NULL) {
2963                                 /*
2964                                  * lock guy returned and lower count note
2965                                  * that we are not bound so inp_tmp should
2966                                  * NEVER be inp. And it is this inp
2967                                  * (inp_tmp) that gets the reference bump,
2968                                  * so we must lower it.
2969                                  */
2970                                 SCTP_INP_DECR_REF(inp_tmp);
2971                                 /* unlock info */
2972                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2973                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2974                                         /* Ok, must be one-2-one and
2975                                          * allowing port re-use */
2976                                         port_reuse_active = 1;
2977                                         goto continue_anyway;
2978                                 }
2979                                 SCTP_INP_DECR_REF(inp);
2980                                 SCTP_INP_INFO_WUNLOCK();
2981                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2982                                 return (EADDRINUSE);
2983                         }
2984                 }
2985 continue_anyway:
2986                 SCTP_INP_WLOCK(inp);
2987                 if (bindall) {
2988                         /* verify that no lport is not used by a singleton */
2989                         if ((port_reuse_active == 0) &&
2990                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
2991                                 /* Sorry someone already has this one bound */
2992                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2993                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2994                                         port_reuse_active = 1;
2995                                 } else {
2996                                         SCTP_INP_DECR_REF(inp);
2997                                         SCTP_INP_WUNLOCK(inp);
2998                                         SCTP_INP_INFO_WUNLOCK();
2999                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3000                                         return (EADDRINUSE);
3001                                 }
3002                         }
3003                 }
3004         } else {
3005                 uint16_t first, last, candidate;
3006                 uint16_t count;
3007                 int done;
3008
3009                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3010                         first = MODULE_GLOBAL(ipport_hifirstauto);
3011                         last = MODULE_GLOBAL(ipport_hilastauto);
3012                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3013                         if (p && (error =
3014                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3015                             )) {
3016                                 SCTP_INP_DECR_REF(inp);
3017                                 SCTP_INP_WUNLOCK(inp);
3018                                 SCTP_INP_INFO_WUNLOCK();
3019                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3020                                 return (error);
3021                         }
3022                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3023                         last = MODULE_GLOBAL(ipport_lowlastauto);
3024                 } else {
3025                         first = MODULE_GLOBAL(ipport_firstauto);
3026                         last = MODULE_GLOBAL(ipport_lastauto);
3027                 }
3028                 if (first > last) {
3029                         uint16_t temp;
3030
3031                         temp = first;
3032                         first = last;
3033                         last = temp;
3034                 }
3035                 count = last - first + 1;       /* number of candidates */
3036                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3037
3038                 done = 0;
3039                 while (!done) {
3040                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3041                                 done = 1;
3042                         }
3043                         if (!done) {
3044                                 if (--count == 0) {
3045                                         SCTP_INP_DECR_REF(inp);
3046                                         SCTP_INP_WUNLOCK(inp);
3047                                         SCTP_INP_INFO_WUNLOCK();
3048                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3049                                         return (EADDRINUSE);
3050                                 }
3051                                 if (candidate == last)
3052                                         candidate = first;
3053                                 else
3054                                         candidate = candidate + 1;
3055                         }
3056                 }
3057                 lport = htons(candidate);
3058         }
3059         SCTP_INP_DECR_REF(inp);
3060         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3061             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3062                 /*
3063                  * this really should not happen. The guy did a non-blocking
3064                  * bind and then did a close at the same time.
3065                  */
3066                 SCTP_INP_WUNLOCK(inp);
3067                 SCTP_INP_INFO_WUNLOCK();
3068                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3069                 return (EINVAL);
3070         }
3071         /* ok we look clear to give out this port, so lets setup the binding */
3072         if (bindall) {
3073                 /* binding to all addresses, so just set in the proper flags */
3074                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3075                 /* set the automatic addr changes from kernel flag */
3076                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3077                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3078                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3079                 } else {
3080                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3081                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3082                 }
3083                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3084                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3085                 } else {
3086                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3087                 }
3088                 /*
3089                  * set the automatic mobility_base from kernel flag (by
3090                  * micchie)
3091                  */
3092                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3093                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3094                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3095                 } else {
3096                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3097                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3098                 }
3099                 /*
3100                  * set the automatic mobility_fasthandoff from kernel flag
3101                  * (by micchie)
3102                  */
3103                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3104                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3105                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3106                 } else {
3107                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3108                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3109                 }
3110         } else {
3111                 /*
3112                  * bind specific, make sure flags is off and add a new
3113                  * address structure to the sctp_addr_list inside the ep
3114                  * structure.
3115                  *
3116                  * We will need to allocate one and insert it at the head.
3117                  * The socketopt call can just insert new addresses in there
3118                  * as well. It will also have to do the embed scope kame
3119                  * hack too (before adding).
3120                  */
3121                 struct sctp_ifa *ifa;
3122                 union sctp_sockstore store;
3123
3124                 memset(&store, 0, sizeof(store));
3125                 switch (addr->sa_family) {
3126 #ifdef INET
3127                 case AF_INET:
3128                         memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3129                         store.sin.sin_port = 0;
3130                         break;
3131 #endif
3132 #ifdef INET6
3133                 case AF_INET6:
3134                         memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3135                         store.sin6.sin6_port = 0;
3136                         break;
3137 #endif
3138                 default:
3139                         break;
3140                 }
3141                 /*
3142                  * first find the interface with the bound address need to
3143                  * zero out the port to find the address! yuck! can't do
3144                  * this earlier since need port for sctp_pcb_findep()
3145                  */
3146                 if (sctp_ifap != NULL) {
3147                         ifa = sctp_ifap;
3148                 } else {
3149                         /*
3150                          * Note for BSD we hit here always other O/S's will
3151                          * pass things in via the sctp_ifap argument
3152                          * (Panda).
3153                          */
3154                         ifa = sctp_find_ifa_by_addr(&store.sa,
3155                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3156                 }
3157                 if (ifa == NULL) {
3158                         /* Can't find an interface with that address */
3159                         SCTP_INP_WUNLOCK(inp);
3160                         SCTP_INP_INFO_WUNLOCK();
3161                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3162                         return (EADDRNOTAVAIL);
3163                 }
3164 #ifdef INET6
3165                 if (addr->sa_family == AF_INET6) {
3166                         /* GAK, more FIXME IFA lock? */
3167                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3168                                 /* Can't bind a non-existent addr. */
3169                                 SCTP_INP_WUNLOCK(inp);
3170                                 SCTP_INP_INFO_WUNLOCK();
3171                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3172                                 return (EINVAL);
3173                         }
3174                 }
3175 #endif
3176                 /* we're not bound all */
3177                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3178                 /* allow bindx() to send ASCONF's for binding changes */
3179                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3180                 /* clear automatic addr changes from kernel flag */
3181                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3182
3183                 /* add this address to the endpoint list */
3184                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3185                 if (error != 0) {
3186                         SCTP_INP_WUNLOCK(inp);
3187                         SCTP_INP_INFO_WUNLOCK();
3188                         return (error);
3189                 }
3190                 inp->laddr_count++;
3191         }
3192         /* find the bucket */
3193         if (port_reuse_active) {
3194                 /* Put it into tcp 1-2-1 hash */
3195                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3196                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3197         } else {
3198                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3199         }
3200         /* put it in the bucket */
3201         LIST_INSERT_HEAD(head, inp, sctp_hash);
3202         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3203             (void *)head, ntohs(lport), port_reuse_active);
3204         /* set in the port */
3205         inp->sctp_lport = lport;
3206
3207         /* turn off just the unbound flag */
3208         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3209         SCTP_INP_WUNLOCK(inp);
3210         SCTP_INP_INFO_WUNLOCK();
3211         return (0);
3212 }
3213
3214
3215 static void
3216 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3217 {
3218         struct sctp_iterator *it, *nit;
3219
3220         /*
3221          * We enter with the only the ITERATOR_LOCK in place and a write
3222          * lock on the inp_info stuff.
3223          */
3224         it = sctp_it_ctl.cur_it;
3225         if (it && (it->vn != curvnet)) {
3226                 /* Its not looking at our VNET */
3227                 return;
3228         }
3229         if (it && (it->inp == inp)) {
3230                 /*
3231                  * This is tricky and we hold the iterator lock, but when it
3232                  * returns and gets the lock (when we release it) the
3233                  * iterator will try to operate on inp. We need to stop that
3234                  * from happening. But of course the iterator has a
3235                  * reference on the stcb and inp. We can mark it and it will
3236                  * stop.
3237                  *
3238                  * If its a single iterator situation, we set the end
3239                  * iterator flag. Otherwise we set the iterator to go to the
3240                  * next inp.
3241                  *
3242                  */
3243                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3244                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3245                 } else {
3246                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3247                 }
3248         }
3249         /*
3250          * Now go through and remove any single reference to our inp that
3251          * may be still pending on the list
3252          */
3253         SCTP_IPI_ITERATOR_WQ_LOCK();
3254         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3255                 if (it->vn != curvnet) {
3256                         continue;
3257                 }
3258                 if (it->inp == inp) {
3259                         /* This one points to me is it inp specific? */
3260                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3261                                 /* Remove and free this one */
3262                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3263                                     it, sctp_nxt_itr);
3264                                 if (it->function_atend != NULL) {
3265                                         (*it->function_atend) (it->pointer, it->val);
3266                                 }
3267                                 SCTP_FREE(it, SCTP_M_ITER);
3268                         } else {
3269                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3270                                 if (it->inp) {
3271                                         SCTP_INP_INCR_REF(it->inp);
3272                                 }
3273                         }
3274                         /* When its put in the refcnt is incremented so decr
3275                          * it */
3276                         SCTP_INP_DECR_REF(inp);
3277                 }
3278         }
3279         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3280 }
3281
3282 /* release sctp_inpcb unbind the port */
3283 void
3284 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3285 {
3286         /*
3287          * Here we free a endpoint. We must find it (if it is in the Hash
3288          * table) and remove it from there. Then we must also find it in the
3289          * overall list and remove it from there. After all removals are
3290          * complete then any timer has to be stopped. Then start the actual
3291          * freeing. a) Any local lists. b) Any associations. c) The hash of
3292          * all associations. d) finally the ep itself.
3293          */
3294         struct sctp_tcb *asoc, *nasoc;
3295         struct sctp_laddr *laddr, *nladdr;
3296         struct inpcb *ip_pcb;
3297         struct socket *so;
3298         int being_refed = 0;
3299         struct sctp_queued_to_read *sq, *nsq;
3300         int cnt;
3301         sctp_sharedkey_t *shared_key, *nshared_key;
3302
3303
3304 #ifdef SCTP_LOG_CLOSING
3305         sctp_log_closing(inp, NULL, 0);
3306 #endif
3307         SCTP_ITERATOR_LOCK();
3308         /* mark any iterators on the list or being processed */
3309         sctp_iterator_inp_being_freed(inp);
3310         SCTP_ITERATOR_UNLOCK();
3311         so = inp->sctp_socket;
3312         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3313                 /* been here before.. eeks.. get out of here */
3314                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3315 #ifdef SCTP_LOG_CLOSING
3316                 sctp_log_closing(inp, NULL, 1);
3317 #endif
3318                 return;
3319         }
3320         SCTP_ASOC_CREATE_LOCK(inp);
3321         SCTP_INP_INFO_WLOCK();
3322
3323         SCTP_INP_WLOCK(inp);
3324         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3325                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3326                 /* socket is gone, so no more wakeups allowed */
3327                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3328                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3329                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3330
3331         }
3332         /* First time through we have the socket lock, after that no more. */
3333         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3334             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3335
3336         if (inp->control) {
3337                 sctp_m_freem(inp->control);
3338                 inp->control = NULL;
3339         }
3340         if (inp->pkt) {
3341                 sctp_m_freem(inp->pkt);
3342                 inp->pkt = NULL;
3343         }
3344         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3345                                          * here but I will be nice :> (i.e.
3346                                          * ip_pcb = ep;) */
3347         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3348                 int cnt_in_sd;
3349
3350                 cnt_in_sd = 0;
3351                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3352                         SCTP_TCB_LOCK(asoc);
3353                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3354                                 /* Skip guys being freed */
3355                                 cnt_in_sd++;
3356                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3357                                         /*
3358                                          * Special case - we did not start a
3359                                          * kill timer on the asoc due to it
3360                                          * was not closed. So go ahead and
3361                                          * start it now.
3362                                          */
3363                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3364                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3365                                 }
3366                                 SCTP_TCB_UNLOCK(asoc);
3367                                 continue;
3368                         }
3369                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3370                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3371                             (asoc->asoc.total_output_queue_size == 0)) {
3372                                 /*
3373                                  * If we have data in queue, we don't want
3374                                  * to just free since the app may have done,
3375                                  * send()/close or connect/send/close. And
3376                                  * it wants the data to get across first.
3377                                  */
3378                                 /* Just abandon things in the front states */
3379                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3380                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3381                                         cnt_in_sd++;
3382                                 }
3383                                 continue;
3384                         }
3385                         /* Disconnect the socket please */
3386                         asoc->sctp_socket = NULL;
3387                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3388                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3389                             (asoc->asoc.control_pdapi) ||
3390                             (asoc->asoc.size_on_all_streams > 0) ||
3391                             (so && (so->so_rcv.sb_cc > 0))) {
3392                                 /* Left with Data unread */
3393                                 struct mbuf *op_err;
3394
3395                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3396                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3397                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3398                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3399                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3400                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3401                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3402                                 }
3403                                 if (sctp_free_assoc(inp, asoc,
3404                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3405                                         cnt_in_sd++;
3406                                 }
3407                                 continue;
3408                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3409                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3410                             (asoc->asoc.stream_queue_cnt == 0)) {
3411                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3412                                         goto abort_anyway;
3413                                 }
3414                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3415                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3416                                         struct sctp_nets *netp;
3417
3418                                         /*
3419                                          * there is nothing queued to send,
3420                                          * so I send shutdown
3421                                          */
3422                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3423                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3424                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3425                                         }
3426                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3427                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3428                                         sctp_stop_timers_for_shutdown(asoc);
3429                                         if (asoc->asoc.alternate) {
3430                                                 netp = asoc->asoc.alternate;
3431                                         } else {
3432                                                 netp = asoc->asoc.primary_destination;
3433                                         }
3434                                         sctp_send_shutdown(asoc, netp);
3435                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3436                                             netp);
3437                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3438                                             asoc->asoc.primary_destination);
3439                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3440                                 }
3441                         } else {
3442                                 /* mark into shutdown pending */
3443                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3444                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3445                                     asoc->asoc.primary_destination);
3446                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3447                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3448                                 }
3449                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3450                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3451                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3452                                         struct mbuf *op_err;
3453
3454                         abort_anyway:
3455                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3456                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3457                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3458                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3459                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3460                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3461                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3462                                         }
3463                                         if (sctp_free_assoc(inp, asoc,
3464                                             SCTP_PCBFREE_NOFORCE,
3465                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3466                                                 cnt_in_sd++;
3467                                         }
3468                                         continue;
3469                                 } else {
3470                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3471                                 }
3472                         }
3473                         cnt_in_sd++;
3474                         SCTP_TCB_UNLOCK(asoc);
3475                 }
3476                 /* now is there some left in our SHUTDOWN state? */
3477                 if (cnt_in_sd) {
3478 #ifdef SCTP_LOG_CLOSING
3479                         sctp_log_closing(inp, NULL, 2);
3480 #endif
3481                         inp->sctp_socket = NULL;
3482                         SCTP_INP_WUNLOCK(inp);
3483                         SCTP_ASOC_CREATE_UNLOCK(inp);
3484                         SCTP_INP_INFO_WUNLOCK();
3485                         return;
3486                 }
3487         }
3488         inp->sctp_socket = NULL;
3489         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3490             SCTP_PCB_FLAGS_UNBOUND) {
3491                 /*
3492                  * ok, this guy has been bound. It's port is somewhere in
3493                  * the SCTP_BASE_INFO(hash table). Remove it!
3494                  */
3495                 LIST_REMOVE(inp, sctp_hash);
3496                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3497         }
3498         /*
3499          * If there is a timer running to kill us, forget it, since it may
3500          * have a contest on the INP lock.. which would cause us to die ...
3501          */
3502         cnt = 0;
3503         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3504                 SCTP_TCB_LOCK(asoc);
3505                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3506                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3507                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3508                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3509                         }
3510                         cnt++;
3511                         SCTP_TCB_UNLOCK(asoc);
3512                         continue;
3513                 }
3514                 /* Free associations that are NOT killing us */
3515                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3516                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3517                         struct mbuf *op_err;
3518
3519                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3520                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3521                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3522                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3523                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3524                         cnt++;
3525                         SCTP_TCB_UNLOCK(asoc);
3526                         continue;
3527                 }
3528                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3529                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3530                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3531                 }
3532                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3533                     SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3534                         cnt++;
3535                 }
3536         }
3537         if (cnt) {
3538                 /* Ok we have someone out there that will kill us */
3539                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3540 #ifdef SCTP_LOG_CLOSING
3541                 sctp_log_closing(inp, NULL, 3);
3542 #endif
3543                 SCTP_INP_WUNLOCK(inp);
3544                 SCTP_ASOC_CREATE_UNLOCK(inp);
3545                 SCTP_INP_INFO_WUNLOCK();
3546                 return;
3547         }
3548         if (SCTP_INP_LOCK_CONTENDED(inp))
3549                 being_refed++;
3550         if (SCTP_INP_READ_CONTENDED(inp))
3551                 being_refed++;
3552         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3553                 being_refed++;
3554
3555         if ((inp->refcount) ||
3556             (being_refed) ||
3557             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3558                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3559 #ifdef SCTP_LOG_CLOSING
3560                 sctp_log_closing(inp, NULL, 4);
3561 #endif
3562                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3563                 SCTP_INP_WUNLOCK(inp);
3564                 SCTP_ASOC_CREATE_UNLOCK(inp);
3565                 SCTP_INP_INFO_WUNLOCK();
3566                 return;
3567         }
3568         inp->sctp_ep.signature_change.type = 0;
3569         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3570         /*
3571          * Remove it from the list .. last thing we need a lock for.
3572          */
3573         LIST_REMOVE(inp, sctp_list);
3574         SCTP_INP_WUNLOCK(inp);
3575         SCTP_ASOC_CREATE_UNLOCK(inp);
3576         SCTP_INP_INFO_WUNLOCK();
3577         /*
3578          * Now we release all locks. Since this INP cannot be found anymore
3579          * except possibly by the kill timer that might be running. We call
3580          * the drain function here. It should hit the case were it sees the
3581          * ACTIVE flag cleared and exit out freeing us to proceed and
3582          * destroy everything.
3583          */
3584         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3585                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3586         } else {
3587                 /* Probably un-needed */
3588                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3589         }
3590
3591 #ifdef SCTP_LOG_CLOSING
3592         sctp_log_closing(inp, NULL, 5);
3593 #endif
3594
3595
3596         if ((inp->sctp_asocidhash) != NULL) {
3597                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3598                 inp->sctp_asocidhash = NULL;
3599         }
3600         /* sa_ignore FREED_MEMORY */
3601         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3602                 /* Its only abandoned if it had data left */
3603                 if (sq->length)
3604                         SCTP_STAT_INCR(sctps_left_abandon);
3605
3606                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3607                 sctp_free_remote_addr(sq->whoFrom);
3608                 if (so)
3609                         so->so_rcv.sb_cc -= sq->length;
3610                 if (sq->data) {
3611                         sctp_m_freem(sq->data);
3612                         sq->data = NULL;
3613                 }
3614                 /*
3615                  * no need to free the net count, since at this point all
3616                  * assoc's are gone.
3617                  */
3618                 sctp_free_a_readq(NULL, sq);
3619         }
3620         /* Now the sctp_pcb things */
3621         /*
3622          * free each asoc if it is not already closed/free. we can't use the
3623          * macro here since le_next will get freed as part of the
3624          * sctp_free_assoc() call.
3625          */
3626 #ifdef IPSEC
3627         ipsec_delete_pcbpolicy(ip_pcb);
3628 #endif
3629         if (ip_pcb->inp_options) {
3630                 (void)sctp_m_free(ip_pcb->inp_options);
3631                 ip_pcb->inp_options = 0;
3632         }
3633 #ifdef INET6
3634         if (ip_pcb->inp_vflag & INP_IPV6) {
3635                 struct in6pcb *in6p;
3636
3637                 in6p = (struct in6pcb *)inp;
3638                 ip6_freepcbopts(in6p->in6p_outputopts);
3639         }
3640 #endif                          /* INET6 */
3641         ip_pcb->inp_vflag = 0;
3642         /* free up authentication fields */
3643         if (inp->sctp_ep.local_auth_chunks != NULL)
3644                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3645         if (inp->sctp_ep.local_hmacs != NULL)
3646                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3647
3648         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3649                 LIST_REMOVE(shared_key, next);
3650                 sctp_free_sharedkey(shared_key);
3651                 /* sa_ignore FREED_MEMORY */
3652         }
3653
3654         /*
3655          * if we have an address list the following will free the list of
3656          * ifaddr's that are set into this ep. Again macro limitations here,
3657          * since the LIST_FOREACH could be a bad idea.
3658          */
3659         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3660                 sctp_remove_laddr(laddr);
3661         }
3662
3663 #ifdef SCTP_TRACK_FREED_ASOCS
3664         /* TEMP CODE */
3665         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3666                 LIST_REMOVE(asoc, sctp_tcblist);
3667                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3668                 SCTP_DECR_ASOC_COUNT();
3669         }
3670         /* *** END TEMP CODE *** */
3671 #endif
3672         /* Now lets see about freeing the EP hash table. */
3673         if (inp->sctp_tcbhash != NULL) {
3674                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3675                 inp->sctp_tcbhash = NULL;
3676         }
3677         /* Now we must put the ep memory back into the zone pool */
3678         crfree(inp->ip_inp.inp.inp_cred);
3679         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3680         SCTP_INP_LOCK_DESTROY(inp);
3681         SCTP_INP_READ_DESTROY(inp);
3682         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3683         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3684         SCTP_DECR_EP_COUNT();
3685 }
3686
3687
3688 struct sctp_nets *
3689 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3690 {
3691         struct sctp_nets *net;
3692
3693         /* locate the address */
3694         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3695                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3696                         return (net);
3697         }
3698         return (NULL);
3699 }
3700
3701
3702 int
3703 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3704 {
3705         struct sctp_ifa *sctp_ifa;
3706
3707         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3708         if (sctp_ifa) {
3709                 return (1);
3710         } else {
3711                 return (0);
3712         }
3713 }
3714
3715 /*
3716  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3717  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3718  * stats of stuff.
3719  */
3720 int
3721 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3722     struct sctp_nets **netp, uint16_t port, int set_scope, int from)
3723 {
3724         /*
3725          * The following is redundant to the same lines in the
3726          * sctp_aloc_assoc() but is needed since others call the add address
3727          * function
3728          */
3729         struct sctp_nets *net, *netfirst;
3730         int addr_inscope;
3731
3732         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3733             from);
3734         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3735
3736         netfirst = sctp_findnet(stcb, newaddr);
3737         if (netfirst) {
3738                 /*
3739                  * Lie and return ok, we don't want to make the association
3740                  * go away for this behavior. It will happen in the TCP
3741                  * model in a connected socket. It does not reach the hash
3742                  * table until after the association is built so it can't be
3743                  * found. Mark as reachable, since the initial creation will
3744                  * have been cleared and the NOT_IN_ASSOC flag will have
3745                  * been added... and we don't want to end up removing it
3746                  * back out.
3747                  */
3748                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3749                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3750                             SCTP_ADDR_UNCONFIRMED);
3751                 } else {
3752                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3753                 }
3754
3755                 return (0);
3756         }
3757         addr_inscope = 1;
3758         switch (newaddr->sa_family) {
3759 #ifdef INET
3760         case AF_INET:
3761                 {
3762                         struct sockaddr_in *sin;
3763
3764                         sin = (struct sockaddr_in *)newaddr;
3765                         if (sin->sin_addr.s_addr == 0) {
3766                                 /* Invalid address */
3767                                 return (-1);
3768                         }
3769                         /* zero out the bzero area */
3770                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3771
3772                         /* assure len is set */
3773                         sin->sin_len = sizeof(struct sockaddr_in);
3774                         if (set_scope) {
3775                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3776                                         stcb->asoc.scope.ipv4_local_scope = 1;
3777                                 }
3778                         } else {
3779                                 /* Validate the address is in scope */
3780                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3781                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3782                                         addr_inscope = 0;
3783                                 }
3784                         }
3785                         break;
3786                 }
3787 #endif
3788 #ifdef INET6
3789         case AF_INET6:
3790                 {
3791                         struct sockaddr_in6 *sin6;
3792
3793                         sin6 = (struct sockaddr_in6 *)newaddr;
3794                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3795                                 /* Invalid address */
3796                                 return (-1);
3797                         }
3798                         /* assure len is set */
3799                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3800                         if (set_scope) {
3801                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3802                                         stcb->asoc.scope.loopback_scope = 1;
3803                                         stcb->asoc.scope.local_scope = 0;
3804                                         stcb->asoc.scope.ipv4_local_scope = 1;
3805                                         stcb->asoc.scope.site_scope = 1;
3806                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3807                                         /*
3808                                          * If the new destination is a
3809                                          * LINK_LOCAL we must have common
3810                                          * site scope. Don't set the local
3811                                          * scope since we may not share all
3812                                          * links, only loopback can do this.
3813                                          * Links on the local network would
3814                                          * also be on our private network
3815                                          * for v4 too.
3816                                          */
3817                                         stcb->asoc.scope.ipv4_local_scope = 1;
3818                                         stcb->asoc.scope.site_scope = 1;
3819                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3820                                         /*
3821                                          * If the new destination is
3822                                          * SITE_LOCAL then we must have site
3823                                          * scope in common.
3824                                          */
3825                                         stcb->asoc.scope.site_scope = 1;
3826                                 }
3827                         } else {
3828                                 /* Validate the address is in scope */
3829                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3830                                     (stcb->asoc.scope.loopback_scope == 0)) {
3831                                         addr_inscope = 0;
3832                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3833                                     (stcb->asoc.scope.local_scope == 0)) {
3834                                         addr_inscope = 0;
3835                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3836                                     (stcb->asoc.scope.site_scope == 0)) {
3837                                         addr_inscope = 0;
3838                                 }
3839                         }
3840                         break;
3841                 }
3842 #endif
3843         default:
3844                 /* not supported family type */
3845                 return (-1);
3846         }
3847         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3848         if (net == NULL) {
3849                 return (-1);
3850         }
3851         SCTP_INCR_RADDR_COUNT();
3852         bzero(net, sizeof(struct sctp_nets));
3853         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3854         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3855         switch (newaddr->sa_family) {
3856 #ifdef INET
3857         case AF_INET:
3858                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3859                 break;
3860 #endif
3861 #ifdef INET6
3862         case AF_INET6:
3863                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3864                 break;
3865 #endif
3866         default:
3867                 break;
3868         }
3869         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3870         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3871                 stcb->asoc.scope.loopback_scope = 1;
3872                 stcb->asoc.scope.ipv4_local_scope = 1;
3873                 stcb->asoc.scope.local_scope = 0;
3874                 stcb->asoc.scope.site_scope = 1;
3875                 addr_inscope = 1;
3876         }
3877         net->failure_threshold = stcb->asoc.def_net_failure;
3878         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3879         if (addr_inscope == 0) {
3880                 net->dest_state = (SCTP_ADDR_REACHABLE |
3881                     SCTP_ADDR_OUT_OF_SCOPE);
3882         } else {
3883                 if (from == SCTP_ADDR_IS_CONFIRMED)
3884                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3885                         net->dest_state = SCTP_ADDR_REACHABLE;
3886                 else
3887                         net->dest_state = SCTP_ADDR_REACHABLE |
3888                             SCTP_ADDR_UNCONFIRMED;
3889         }
3890         /*
3891          * We set this to 0, the timer code knows that this means its an
3892          * initial value
3893          */
3894         net->rto_needed = 1;
3895         net->RTO = 0;
3896         net->RTO_measured = 0;
3897         stcb->asoc.numnets++;
3898         net->ref_count = 1;
3899         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3900         net->port = port;
3901         net->dscp = stcb->asoc.default_dscp;
3902 #ifdef INET6
3903         net->flowlabel = stcb->asoc.default_flowlabel;
3904 #endif
3905         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3906                 net->dest_state |= SCTP_ADDR_NOHB;
3907         } else {
3908                 net->dest_state &= ~SCTP_ADDR_NOHB;
3909         }
3910         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3911                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3912         } else {
3913                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3914         }
3915         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3916         /* Init the timer structure */
3917         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3918         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3919         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3920
3921         /* Now generate a route for this guy */
3922 #ifdef INET6
3923         /* KAME hack: embed scopeid */
3924         if (newaddr->sa_family == AF_INET6) {
3925                 struct sockaddr_in6 *sin6;
3926
3927                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3928                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3929                 sin6->sin6_scope_id = 0;
3930         }
3931 #endif
3932         SCTP_RTALLOC((sctp_route_t *) & net->ro,
3933             stcb->asoc.vrf_id,
3934             stcb->sctp_ep->fibnum);
3935
3936         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3937                 /* Get source address */
3938                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3939                     stcb,
3940                     (sctp_route_t *) & net->ro,
3941                     net,
3942                     0,
3943                     stcb->asoc.vrf_id);
3944                 if (net->ro._s_addr != NULL) {
3945                         net->src_addr_selected = 1;
3946                         /* Now get the interface MTU */
3947                         if (net->ro._s_addr->ifn_p != NULL) {
3948                                 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3949                         }
3950                 } else {
3951                         net->src_addr_selected = 0;
3952                 }
3953                 if (net->mtu > 0) {
3954                         uint32_t rmtu;
3955
3956                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3957                         if (rmtu == 0) {
3958                                 /* Start things off to match mtu of
3959                                  * interface please. */
3960                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3961                                     net->ro.ro_rt, net->mtu);
3962                         } else {
3963                                 /*
3964                                  * we take the route mtu over the interface,
3965                                  * since the route may be leading out the
3966                                  * loopback, or a different interface.
3967                                  */
3968                                 net->mtu = rmtu;
3969                         }
3970                 }
3971         } else {
3972                 net->src_addr_selected = 0;
3973         }
3974         if (net->mtu == 0) {
3975                 switch (newaddr->sa_family) {
3976 #ifdef INET
3977                 case AF_INET:
3978                         net->mtu = SCTP_DEFAULT_MTU;
3979                         break;
3980 #endif
3981 #ifdef INET6
3982                 case AF_INET6:
3983                         net->mtu = 1280;
3984                         break;
3985 #endif
3986                 default:
3987                         break;
3988                 }
3989         }
3990 #if defined(INET) || defined(INET6)
3991         if (net->port) {
3992                 net->mtu -= (uint32_t) sizeof(struct udphdr);
3993         }
3994 #endif
3995         if (from == SCTP_ALLOC_ASOC) {
3996                 stcb->asoc.smallest_mtu = net->mtu;
3997         }
3998         if (stcb->asoc.smallest_mtu > net->mtu) {
3999                 sctp_pathmtu_adjustment(stcb, net->mtu);
4000         }
4001 #ifdef INET6
4002         if (newaddr->sa_family == AF_INET6) {
4003                 struct sockaddr_in6 *sin6;
4004
4005                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4006                 (void)sa6_recoverscope(sin6);
4007         }
4008 #endif
4009
4010         /* JRS - Use the congestion control given in the CC module */
4011         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4012                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4013
4014         /*
4015          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4016          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4017          */
4018         net->find_pseudo_cumack = 1;
4019         net->find_rtx_pseudo_cumack = 1;
4020         /* Choose an initial flowid. */
4021         net->flowid = stcb->asoc.my_vtag ^
4022             ntohs(stcb->rport) ^
4023             ntohs(stcb->sctp_ep->sctp_lport);
4024         net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4025         if (netp) {
4026                 *netp = net;
4027         }
4028         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4029         if (net->ro.ro_rt == NULL) {
4030                 /* Since we have no route put it at the back */
4031                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4032         } else if (netfirst == NULL) {
4033                 /* We are the first one in the pool. */
4034                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4035         } else if (netfirst->ro.ro_rt == NULL) {
4036                 /*
4037                  * First one has NO route. Place this one ahead of the first
4038                  * one.
4039                  */
4040                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4041         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4042                 /*
4043                  * This one has a different interface than the one at the
4044                  * top of the list. Place it ahead.
4045                  */
4046                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4047         } else {
4048                 /*
4049                  * Ok we have the same interface as the first one. Move
4050                  * forward until we find either a) one with a NULL route...
4051                  * insert ahead of that b) one with a different ifp.. insert
4052                  * after that. c) end of the list.. insert at the tail.
4053                  */
4054                 struct sctp_nets *netlook;
4055
4056                 do {
4057                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4058                         if (netlook == NULL) {
4059                                 /* End of the list */
4060                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4061                                 break;
4062                         } else if (netlook->ro.ro_rt == NULL) {
4063                                 /* next one has NO route */
4064                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4065                                 break;
4066                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4067                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4068                                     net, sctp_next);
4069                                 break;
4070                         }
4071                         /* Shift forward */
4072                         netfirst = netlook;
4073                 } while (netlook != NULL);
4074         }
4075
4076         /* got to have a primary set */
4077         if (stcb->asoc.primary_destination == 0) {
4078                 stcb->asoc.primary_destination = net;
4079         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4080                     (net->ro.ro_rt) &&
4081             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4082                 /* No route to current primary adopt new primary */
4083                 stcb->asoc.primary_destination = net;
4084         }
4085         /* Validate primary is first */
4086         net = TAILQ_FIRST(&stcb->asoc.nets);
4087         if ((net != stcb->asoc.primary_destination) &&
4088             (stcb->asoc.primary_destination)) {
4089                 /*
4090                  * first one on the list is NOT the primary sctp_cmpaddr()
4091                  * is much more efficient if the primary is the first on the
4092                  * list, make it so.
4093                  */
4094                 TAILQ_REMOVE(&stcb->asoc.nets,
4095                     stcb->asoc.primary_destination, sctp_next);
4096                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4097                     stcb->asoc.primary_destination, sctp_next);
4098         }
4099         return (0);
4100 }
4101
4102
4103 static uint32_t
4104 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4105 {
4106         uint32_t id;
4107         struct sctpasochead *head;
4108         struct sctp_tcb *lstcb;
4109
4110         SCTP_INP_WLOCK(inp);
4111 try_again:
4112         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4113                 /* TSNH */
4114                 SCTP_INP_WUNLOCK(inp);
4115                 return (0);
4116         }
4117         /*
4118          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4119          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4120          */
4121         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4122                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4123         }
4124         id = inp->sctp_associd_counter;
4125         inp->sctp_associd_counter++;
4126         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4127         if (lstcb) {
4128                 goto try_again;
4129         }
4130         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4131         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4132         stcb->asoc.in_asocid_hash = 1;
4133         SCTP_INP_WUNLOCK(inp);
4134         return id;
4135 }
4136
4137 /*
4138  * allocate an association and add it to the endpoint. The caller must be
4139  * careful to add all additional addresses once they are know right away or
4140  * else the assoc will be may experience a blackout scenario.
4141  */
4142 struct sctp_tcb *
4143 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4144     int *error, uint32_t override_tag, uint32_t vrf_id,
4145     uint16_t o_streams, uint16_t port,
4146     struct thread *p
4147 )
4148 {
4149         /* note the p argument is only valid in unbound sockets */
4150
4151         struct sctp_tcb *stcb;
4152         struct sctp_association *asoc;
4153         struct sctpasochead *head;
4154         uint16_t rport;
4155         int err;
4156
4157         /*
4158          * Assumption made here: Caller has done a
4159          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4160          * address does not exist already.
4161          */
4162         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4163                 /* Hit max assoc, sorry no more */
4164                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4165                 *error = ENOBUFS;
4166                 return (NULL);
4167         }
4168         if (firstaddr == NULL) {
4169                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4170                 *error = EINVAL;
4171                 return (NULL);
4172         }
4173         SCTP_INP_RLOCK(inp);
4174         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4175             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4176             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4177                 /*
4178                  * If its in the TCP pool, its NOT allowed to create an
4179                  * association. The parent listener needs to call
4180                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4181                  * off, or connected one does this.. its an error.
4182                  */
4183                 SCTP_INP_RUNLOCK(inp);
4184                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4185                 *error = EINVAL;
4186                 return (NULL);
4187         }
4188         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4189             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4190                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4191                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4192                         SCTP_INP_RUNLOCK(inp);
4193                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4194                         *error = EINVAL;
4195                         return (NULL);
4196                 }
4197         }
4198         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4199 #ifdef SCTP_DEBUG
4200         if (firstaddr) {
4201                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4202                 switch (firstaddr->sa_family) {
4203 #ifdef INET
4204                 case AF_INET:
4205                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4206                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4207                         break;
4208 #endif
4209 #ifdef INET6
4210                 case AF_INET6:
4211                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4212                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4213                         break;
4214 #endif
4215                 default:
4216                         break;
4217                 }
4218         } else {
4219                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4220         }
4221 #endif                          /* SCTP_DEBUG */
4222         switch (firstaddr->sa_family) {
4223 #ifdef INET
4224         case AF_INET:
4225                 {
4226                         struct sockaddr_in *sin;
4227
4228                         sin = (struct sockaddr_in *)firstaddr;
4229                         if ((ntohs(sin->sin_port) == 0) ||
4230                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4231                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4232                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4233                                 /* Invalid address */
4234                                 SCTP_INP_RUNLOCK(inp);
4235                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4236                                 *error = EINVAL;
4237                                 return (NULL);
4238                         }
4239                         rport = sin->sin_port;
4240                         break;
4241                 }
4242 #endif
4243 #ifdef INET6
4244         case AF_INET6:
4245                 {
4246                         struct sockaddr_in6 *sin6;
4247
4248                         sin6 = (struct sockaddr_in6 *)firstaddr;
4249                         if ((ntohs(sin6->sin6_port) == 0) ||
4250                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4251                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4252                                 /* Invalid address */
4253                                 SCTP_INP_RUNLOCK(inp);
4254                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4255                                 *error = EINVAL;
4256                                 return (NULL);
4257                         }
4258                         rport = sin6->sin6_port;
4259                         break;
4260                 }
4261 #endif
4262         default:
4263                 /* not supported family type */
4264                 SCTP_INP_RUNLOCK(inp);
4265                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4266                 *error = EINVAL;
4267                 return (NULL);
4268         }
4269         SCTP_INP_RUNLOCK(inp);
4270         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4271                 /*
4272                  * If you have not performed a bind, then we need to do the
4273                  * ephemeral bind for you.
4274                  */
4275                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4276                     (struct sockaddr *)NULL,
4277                     (struct sctp_ifa *)NULL,
4278                     p
4279                     ))) {
4280                         /* bind error, probably perm */
4281                         *error = err;
4282                         return (NULL);
4283                 }
4284         }
4285         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4286         if (stcb == NULL) {
4287                 /* out of memory? */
4288                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4289                 *error = ENOMEM;
4290                 return (NULL);
4291         }
4292         SCTP_INCR_ASOC_COUNT();
4293
4294         bzero(stcb, sizeof(*stcb));
4295         asoc = &stcb->asoc;
4296
4297         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4298         SCTP_TCB_LOCK_INIT(stcb);
4299         SCTP_TCB_SEND_LOCK_INIT(stcb);
4300         stcb->rport = rport;
4301         /* setup back pointer's */
4302         stcb->sctp_ep = inp;
4303         stcb->sctp_socket = inp->sctp_socket;
4304         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
4305                 /* failed */
4306                 SCTP_TCB_LOCK_DESTROY(stcb);
4307                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4308                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4309                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4310                 SCTP_DECR_ASOC_COUNT();
4311                 *error = err;
4312                 return (NULL);
4313         }
4314         /* and the port */
4315         SCTP_INP_INFO_WLOCK();
4316         SCTP_INP_WLOCK(inp);
4317         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4318                 /* inpcb freed while alloc going on */
4319                 SCTP_TCB_LOCK_DESTROY(stcb);
4320                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4321                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4322                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4323                 SCTP_INP_WUNLOCK(inp);
4324                 SCTP_INP_INFO_WUNLOCK();
4325                 SCTP_DECR_ASOC_COUNT();
4326                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4327                 *error = EINVAL;
4328                 return (NULL);
4329         }
4330         SCTP_TCB_LOCK(stcb);
4331
4332         /* now that my_vtag is set, add it to the hash */
4333         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4334         /* put it in the bucket in the vtag hash of assoc's for the system */
4335         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4336         SCTP_INP_INFO_WUNLOCK();
4337
4338         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4339                 /* failure.. memory error? */
4340                 if (asoc->strmout) {
4341                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4342                         asoc->strmout = NULL;
4343                 }
4344                 if (asoc->mapping_array) {
4345                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4346                         asoc->mapping_array = NULL;
4347                 }
4348                 if (asoc->nr_mapping_array) {
4349                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4350                         asoc->nr_mapping_array = NULL;
4351                 }
4352                 SCTP_DECR_ASOC_COUNT();
4353                 SCTP_TCB_UNLOCK(stcb);
4354                 SCTP_TCB_LOCK_DESTROY(stcb);
4355                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4356                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4357                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4358                 SCTP_INP_WUNLOCK(inp);
4359                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4360                 *error = ENOBUFS;
4361                 return (NULL);
4362         }
4363         /* Init all the timers */
4364         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4365         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4366         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4367         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4368         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4369         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4370         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4371
4372         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4373         /* now file the port under the hash as well */
4374         if (inp->sctp_tcbhash != NULL) {
4375                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4376                     inp->sctp_hashmark)];
4377                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4378         }
4379         SCTP_INP_WUNLOCK(inp);
4380         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4381         return (stcb);
4382 }
4383
4384
4385 void
4386 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4387 {
4388         struct sctp_association *asoc;
4389
4390         asoc = &stcb->asoc;
4391         asoc->numnets--;
4392         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4393         if (net == asoc->primary_destination) {
4394                 /* Reset primary */
4395                 struct sctp_nets *lnet;
4396
4397                 lnet = TAILQ_FIRST(&asoc->nets);
4398                 /*
4399                  * Mobility adaptation Ideally, if deleted destination is
4400                  * the primary, it becomes a fast retransmission trigger by
4401                  * the subsequent SET PRIMARY. (by micchie)
4402                  */
4403                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4404                     SCTP_MOBILITY_BASE) ||
4405                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4406                     SCTP_MOBILITY_FASTHANDOFF)) {
4407                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4408                         if (asoc->deleted_primary != NULL) {
4409                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4410                                 goto out;
4411                         }
4412                         asoc->deleted_primary = net;
4413                         atomic_add_int(&net->ref_count, 1);
4414                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4415                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4416                         sctp_mobility_feature_on(stcb->sctp_ep,
4417                             SCTP_MOBILITY_PRIM_DELETED);
4418                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4419                             stcb->sctp_ep, stcb, NULL);
4420                 }
4421 out:
4422                 /* Try to find a confirmed primary */
4423                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4424         }
4425         if (net == asoc->last_data_chunk_from) {
4426                 /* Reset primary */
4427                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4428         }
4429         if (net == asoc->last_control_chunk_from) {
4430                 /* Clear net */
4431                 asoc->last_control_chunk_from = NULL;
4432         }
4433         if (net == stcb->asoc.alternate) {
4434                 sctp_free_remote_addr(stcb->asoc.alternate);
4435                 stcb->asoc.alternate = NULL;
4436         }
4437         sctp_free_remote_addr(net);
4438 }
4439
4440 /*
4441  * remove a remote endpoint address from an association, it will fail if the
4442  * address does not exist.
4443  */
4444 int
4445 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4446 {
4447         /*
4448          * Here we need to remove a remote address. This is quite simple, we
4449          * first find it in the list of address for the association
4450          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4451          * on that item. Note we do not allow it to be removed if there are
4452          * no other addresses.
4453          */
4454         struct sctp_association *asoc;
4455         struct sctp_nets *net, *nnet;
4456
4457         asoc = &stcb->asoc;
4458
4459         /* locate the address */
4460         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4461                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4462                         continue;
4463                 }
4464                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4465                     remaddr)) {
4466                         /* we found the guy */
4467                         if (asoc->numnets < 2) {
4468                                 /* Must have at LEAST two remote addresses */
4469                                 return (-1);
4470                         } else {
4471                                 sctp_remove_net(stcb, net);
4472                                 return (0);
4473                         }
4474                 }
4475         }
4476         /* not found. */
4477         return (-2);
4478 }
4479
4480 void
4481 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4482 {
4483         struct sctpvtaghead *chain;
4484         struct sctp_tagblock *twait_block;
4485         int found = 0;
4486         int i;
4487
4488         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4489         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4490                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4491                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4492                             (twait_block->vtag_block[i].lport == lport) &&
4493                             (twait_block->vtag_block[i].rport == rport)) {
4494                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4495                                 twait_block->vtag_block[i].v_tag = 0;
4496                                 twait_block->vtag_block[i].lport = 0;
4497                                 twait_block->vtag_block[i].rport = 0;
4498                                 found = 1;
4499                                 break;
4500                         }
4501                 }
4502                 if (found)
4503                         break;
4504         }
4505 }
4506
4507 int
4508 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4509 {
4510         struct sctpvtaghead *chain;
4511         struct sctp_tagblock *twait_block;
4512         int found = 0;
4513         int i;
4514
4515         SCTP_INP_INFO_WLOCK();
4516         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4517         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4518                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4519                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4520                             (twait_block->vtag_block[i].lport == lport) &&
4521                             (twait_block->vtag_block[i].rport == rport)) {
4522                                 found = 1;
4523                                 break;
4524                         }
4525                 }
4526                 if (found)
4527                         break;
4528         }
4529         SCTP_INP_INFO_WUNLOCK();
4530         return (found);
4531 }
4532
4533
4534 void
4535 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4536 {
4537         struct sctpvtaghead *chain;
4538         struct sctp_tagblock *twait_block;
4539         struct timeval now;
4540         int set, i;
4541
4542         if (time == 0) {
4543                 /* Its disabled */
4544                 return;
4545         }
4546         (void)SCTP_GETTIME_TIMEVAL(&now);
4547         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4548         set = 0;
4549         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4550                 /* Block(s) present, lets find space, and expire on the fly */
4551                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4552                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4553                             !set) {
4554                                 twait_block->vtag_block[i].tv_sec_at_expire =
4555                                     now.tv_sec + time;
4556                                 twait_block->vtag_block[i].v_tag = tag;
4557                                 twait_block->vtag_block[i].lport = lport;
4558                                 twait_block->vtag_block[i].rport = rport;
4559                                 set = 1;
4560                         } else if ((twait_block->vtag_block[i].v_tag) &&
4561                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4562                                 /* Audit expires this guy */
4563                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4564                                 twait_block->vtag_block[i].v_tag = 0;
4565                                 twait_block->vtag_block[i].lport = 0;
4566                                 twait_block->vtag_block[i].rport = 0;
4567                                 if (set == 0) {
4568                                         /* Reuse it for my new tag */
4569                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4570                                         twait_block->vtag_block[i].v_tag = tag;
4571                                         twait_block->vtag_block[i].lport = lport;
4572                                         twait_block->vtag_block[i].rport = rport;
4573                                         set = 1;
4574                                 }
4575                         }
4576                 }
4577                 if (set) {
4578                         /*
4579                          * We only do up to the block where we can place our
4580                          * tag for audits
4581                          */
4582                         break;
4583                 }
4584         }
4585         /* Need to add a new block to chain */
4586         if (!set) {
4587                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4588                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4589                 if (twait_block == NULL) {
4590 #ifdef INVARIANTS
4591                         panic("Can not alloc tagblock");
4592 #endif
4593                         return;
4594                 }
4595                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4596                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4597                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4598                 twait_block->vtag_block[0].v_tag = tag;
4599                 twait_block->vtag_block[0].lport = lport;
4600                 twait_block->vtag_block[0].rport = rport;
4601         }
4602 }
4603
4604 void
4605 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4606 {
4607         struct sctp_tmit_chunk *chk, *nchk;
4608         struct sctp_queued_to_read *ctl, *nctl;
4609
4610         TAILQ_FOREACH_SAFE(ctl, rh, next_instrm, nctl) {
4611                 TAILQ_REMOVE(rh, ctl, next_instrm);
4612                 ctl->on_strm_q = 0;
4613                 if (ctl->on_read_q == 0) {
4614                         sctp_free_remote_addr(ctl->whoFrom);
4615                         if (ctl->data) {
4616                                 sctp_m_freem(ctl->data);
4617                                 ctl->data = NULL;
4618                         }
4619                 }
4620                 /* Reassembly free? */
4621                 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) {
4622                         TAILQ_REMOVE(&ctl->reasm, chk, sctp_next);
4623                         if (chk->data) {
4624                                 sctp_m_freem(chk->data);
4625                                 chk->data = NULL;
4626                         }
4627                         if (chk->holds_key_ref)
4628                                 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4629                         sctp_free_remote_addr(chk->whoTo);
4630                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4631                         SCTP_DECR_CHK_COUNT();
4632                         /* sa_ignore FREED_MEMORY */
4633                 }
4634                 /*
4635                  * We don't free the address here since all the net's were
4636                  * freed above.
4637                  */
4638                 if (ctl->on_read_q == 0) {
4639                         sctp_free_a_readq(stcb, ctl);
4640                 }
4641         }
4642 }
4643
4644
4645 /*-
4646  * Free the association after un-hashing the remote port. This
4647  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4648  * expect that the input to this function IS a locked TCB.
4649  * It will return 0, if it did NOT destroy the association (instead
4650  * it unlocks it. It will return NON-zero if it either destroyed the
4651  * association OR the association is already destroyed.
4652  */
4653 int
4654 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4655 {
4656         int i;
4657         struct sctp_association *asoc;
4658         struct sctp_nets *net, *nnet;
4659         struct sctp_laddr *laddr, *naddr;
4660         struct sctp_tmit_chunk *chk, *nchk;
4661         struct sctp_asconf_addr *aparam, *naparam;
4662         struct sctp_asconf_ack *aack, *naack;
4663         struct sctp_stream_reset_list *strrst, *nstrrst;
4664         struct sctp_queued_to_read *sq, *nsq;
4665         struct sctp_stream_queue_pending *sp, *nsp;
4666         sctp_sharedkey_t *shared_key, *nshared_key;
4667         struct socket *so;
4668
4669         /* first, lets purge the entry from the hash table. */
4670
4671 #ifdef SCTP_LOG_CLOSING
4672         sctp_log_closing(inp, stcb, 6);
4673 #endif
4674         if (stcb->asoc.state == 0) {
4675 #ifdef SCTP_LOG_CLOSING
4676                 sctp_log_closing(inp, NULL, 7);
4677 #endif
4678                 /* there is no asoc, really TSNH :-0 */
4679                 return (1);
4680         }
4681         if (stcb->asoc.alternate) {
4682                 sctp_free_remote_addr(stcb->asoc.alternate);
4683                 stcb->asoc.alternate = NULL;
4684         }
4685         /* TEMP CODE */
4686         if (stcb->freed_from_where == 0) {
4687                 /* Only record the first place free happened from */
4688                 stcb->freed_from_where = from_location;
4689         }
4690         /* TEMP CODE */
4691
4692         asoc = &stcb->asoc;
4693         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4694             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4695                 /* nothing around */
4696                 so = NULL;
4697         else
4698                 so = inp->sctp_socket;
4699
4700         /*
4701          * We used timer based freeing if a reader or writer is in the way.
4702          * So we first check if we are actually being called from a timer,
4703          * if so we abort early if a reader or writer is still in the way.
4704          */
4705         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4706             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4707                 /*
4708                  * is it the timer driving us? if so are the reader/writers
4709                  * gone?
4710                  */
4711                 if (stcb->asoc.refcnt) {
4712                         /* nope, reader or writer in the way */
4713                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4714                         /* no asoc destroyed */
4715                         SCTP_TCB_UNLOCK(stcb);
4716 #ifdef SCTP_LOG_CLOSING
4717                         sctp_log_closing(inp, stcb, 8);
4718 #endif
4719                         return (0);
4720                 }
4721         }
4722         /* now clean up any other timers */
4723         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4724         asoc->dack_timer.self = NULL;
4725         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4726         /*-
4727          * For stream reset we don't blast this unless
4728          * it is a str-reset timer, it might be the
4729          * free-asoc timer which we DON'T want to
4730          * disturb.
4731          */
4732         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4733                 asoc->strreset_timer.self = NULL;
4734         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4735         asoc->asconf_timer.self = NULL;
4736         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4737         asoc->autoclose_timer.self = NULL;
4738         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4739         asoc->shut_guard_timer.self = NULL;
4740         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4741         asoc->delayed_event_timer.self = NULL;
4742         /* Mobility adaptation */
4743         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4744         asoc->delete_prim_timer.self = NULL;
4745         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4746                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4747                 net->rxt_timer.self = NULL;
4748                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4749                 net->pmtu_timer.self = NULL;
4750                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4751                 net->hb_timer.self = NULL;
4752         }
4753         /* Now the read queue needs to be cleaned up (only once) */
4754         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4755                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4756                 SCTP_INP_READ_LOCK(inp);
4757                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4758                         if (sq->stcb == stcb) {
4759                                 sq->do_not_ref_stcb = 1;
4760                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4761                                 /*
4762                                  * If there is no end, there never will be
4763                                  * now.
4764                                  */
4765                                 if (sq->end_added == 0) {
4766                                         /* Held for PD-API clear that. */
4767                                         sq->pdapi_aborted = 1;
4768                                         sq->held_length = 0;
4769                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4770                                                 /*
4771                                                  * Need to add a PD-API
4772                                                  * aborted indication.
4773                                                  * Setting the control_pdapi
4774                                                  * assures that it will be
4775                                                  * added right after this
4776                                                  * msg.
4777                                                  */
4778                                                 uint32_t strseq;
4779
4780                                                 stcb->asoc.control_pdapi = sq;
4781                                                 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff);
4782                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4783                                                     stcb,
4784                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4785                                                     (void *)&strseq,
4786                                                     SCTP_SO_LOCKED);
4787                                                 stcb->asoc.control_pdapi = NULL;
4788                                         }
4789                                 }
4790                                 /* Add an end to wake them */
4791                                 sq->end_added = 1;
4792                         }
4793                 }
4794                 SCTP_INP_READ_UNLOCK(inp);
4795                 if (stcb->block_entry) {
4796                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4797                         stcb->block_entry->error = ECONNRESET;
4798                         stcb->block_entry = NULL;
4799                 }
4800         }
4801         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4802                 /*
4803                  * Someone holds a reference OR the socket is unaccepted
4804                  * yet.
4805                  */
4806                 if ((stcb->asoc.refcnt) ||
4807                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4808                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4809                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4810                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4811                 }
4812                 SCTP_TCB_UNLOCK(stcb);
4813                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4814                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4815                         /* nothing around */
4816                         so = NULL;
4817                 if (so) {
4818                         /* Wake any reader/writers */
4819                         sctp_sorwakeup(inp, so);
4820                         sctp_sowwakeup(inp, so);
4821                 }
4822 #ifdef SCTP_LOG_CLOSING
4823                 sctp_log_closing(inp, stcb, 9);
4824 #endif
4825                 /* no asoc destroyed */
4826                 return (0);
4827         }
4828 #ifdef SCTP_LOG_CLOSING
4829         sctp_log_closing(inp, stcb, 10);
4830 #endif
4831         /*
4832          * When I reach here, no others want to kill the assoc yet.. and I
4833          * own the lock. Now its possible an abort comes in when I do the
4834          * lock exchange below to grab all the locks to do the final take
4835          * out. to prevent this we increment the count, which will start a
4836          * timer and blow out above thus assuring us that we hold exclusive
4837          * killing of the asoc. Note that after getting back the TCB lock we
4838          * will go ahead and increment the counter back up and stop any
4839          * timer a passing stranger may have started :-S
4840          */
4841         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4842                 atomic_add_int(&stcb->asoc.refcnt, 1);
4843
4844                 SCTP_TCB_UNLOCK(stcb);
4845                 SCTP_INP_INFO_WLOCK();
4846                 SCTP_INP_WLOCK(inp);
4847                 SCTP_TCB_LOCK(stcb);
4848         }
4849         /* Double check the GONE flag */
4850         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4851             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4852                 /* nothing around */
4853                 so = NULL;
4854
4855         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4856             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4857                 /*
4858                  * For TCP type we need special handling when we are
4859                  * connected. We also include the peel'ed off ones to.
4860                  */
4861                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4862                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4863                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4864                         if (so) {
4865                                 SOCK_LOCK(so);
4866                                 if (so->so_rcv.sb_cc == 0) {
4867                                         so->so_state &= ~(SS_ISCONNECTING |
4868                                             SS_ISDISCONNECTING |
4869                                             SS_ISCONFIRMING |
4870                                             SS_ISCONNECTED);
4871                                 }
4872                                 socantrcvmore_locked(so);
4873                                 socantsendmore(so);
4874                                 sctp_sowwakeup(inp, so);
4875                                 sctp_sorwakeup(inp, so);
4876                                 SCTP_SOWAKEUP(so);
4877                         }
4878                 }
4879         }
4880         /*
4881          * Make it invalid too, that way if its about to run it will abort
4882          * and return.
4883          */
4884         /* re-increment the lock */
4885         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4886                 atomic_add_int(&stcb->asoc.refcnt, -1);
4887         }
4888         if (stcb->asoc.refcnt) {
4889                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4890                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4891                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4892                         SCTP_INP_INFO_WUNLOCK();
4893                         SCTP_INP_WUNLOCK(inp);
4894                 }
4895                 SCTP_TCB_UNLOCK(stcb);
4896                 return (0);
4897         }
4898         asoc->state = 0;
4899         if (inp->sctp_tcbhash) {
4900                 LIST_REMOVE(stcb, sctp_tcbhash);
4901         }
4902         if (stcb->asoc.in_asocid_hash) {
4903                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4904         }
4905         /* Now lets remove it from the list of ALL associations in the EP */
4906         LIST_REMOVE(stcb, sctp_tcblist);
4907         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4908                 SCTP_INP_INCR_REF(inp);
4909                 SCTP_INP_WUNLOCK(inp);
4910         }
4911         /* pull from vtag hash */
4912         LIST_REMOVE(stcb, sctp_asocs);
4913         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4914             inp->sctp_lport, stcb->rport);
4915
4916         /*
4917          * Now restop the timers to be sure this is paranoia at is finest!
4918          */
4919         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4920         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4921         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4922         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4923         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4924         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4925         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4926         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4927                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4928                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4929                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4930         }
4931
4932         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4933         /*
4934          * The chunk lists and such SHOULD be empty but we check them just
4935          * in case.
4936          */
4937         /* anything on the wheel needs to be removed */
4938         for (i = 0; i < asoc->streamoutcnt; i++) {
4939                 struct sctp_stream_out *outs;
4940
4941                 outs = &asoc->strmout[i];
4942                 /* now clean up any chunks here */
4943                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4944                         atomic_subtract_int(&asoc->stream_queue_cnt, 1);
4945                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4946                         stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 0);
4947                         sctp_free_spbufspace(stcb, asoc, sp);
4948                         if (sp->data) {
4949                                 if (so) {
4950                                         /* Still an open socket - report */
4951                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4952                                             0, (void *)sp, SCTP_SO_LOCKED);
4953                                 }
4954                                 if (sp->data) {
4955                                         sctp_m_freem(sp->data);
4956                                         sp->data = NULL;
4957                                         sp->tail_mbuf = NULL;
4958                                         sp->length = 0;
4959                                 }
4960                         }
4961                         if (sp->net) {
4962                                 sctp_free_remote_addr(sp->net);
4963                                 sp->net = NULL;
4964                         }
4965                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4966                 }
4967         }
4968         /* sa_ignore FREED_MEMORY */
4969         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4970                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4971                 SCTP_FREE(strrst, SCTP_M_STRESET);
4972         }
4973         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4974                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4975                 if (sq->data) {
4976                         sctp_m_freem(sq->data);
4977                         sq->data = NULL;
4978                 }
4979                 sctp_free_remote_addr(sq->whoFrom);
4980                 sq->whoFrom = NULL;
4981                 sq->stcb = NULL;
4982                 /* Free the ctl entry */
4983                 sctp_free_a_readq(stcb, sq);
4984                 /* sa_ignore FREED_MEMORY */
4985         }
4986         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4987                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4988                 if (chk->data) {
4989                         sctp_m_freem(chk->data);
4990                         chk->data = NULL;
4991                 }
4992                 if (chk->holds_key_ref)
4993                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4994                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4995                 SCTP_DECR_CHK_COUNT();
4996                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4997                 asoc->free_chunk_cnt--;
4998                 /* sa_ignore FREED_MEMORY */
4999         }
5000         /* pending send queue SHOULD be empty */
5001         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5002                 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5003                         asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5004 #ifdef INVARIANTS
5005                 } else {
5006                         panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5007 #endif
5008                 }
5009                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5010                 if (chk->data) {
5011                         if (so) {
5012                                 /* Still a socket? */
5013                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5014                                     0, chk, SCTP_SO_LOCKED);
5015                         }
5016                         if (chk->data) {
5017                                 sctp_m_freem(chk->data);
5018                                 chk->data = NULL;
5019                         }
5020                 }
5021                 if (chk->holds_key_ref)
5022                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5023                 if (chk->whoTo) {
5024                         sctp_free_remote_addr(chk->whoTo);
5025                         chk->whoTo = NULL;
5026                 }
5027                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5028                 SCTP_DECR_CHK_COUNT();
5029                 /* sa_ignore FREED_MEMORY */
5030         }
5031         /* sent queue SHOULD be empty */
5032         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5033                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5034                         if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5035                                 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5036 #ifdef INVARIANTS
5037                         } else {
5038                                 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5039 #endif
5040                         }
5041                 }
5042                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5043                 if (chk->data) {
5044                         if (so) {
5045                                 /* Still a socket? */
5046                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5047                                     0, chk, SCTP_SO_LOCKED);
5048                         }
5049                         if (chk->data) {
5050                                 sctp_m_freem(chk->data);
5051                                 chk->data = NULL;
5052                         }
5053                 }
5054                 if (chk->holds_key_ref)
5055                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5056                 sctp_free_remote_addr(chk->whoTo);
5057                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5058                 SCTP_DECR_CHK_COUNT();
5059                 /* sa_ignore FREED_MEMORY */
5060         }
5061 #ifdef INVARIANTS
5062         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5063                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5064                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5065                 }
5066         }
5067 #endif
5068         /* control queue MAY not be empty */
5069         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5070                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5071                 if (chk->data) {
5072                         sctp_m_freem(chk->data);
5073                         chk->data = NULL;
5074                 }
5075                 if (chk->holds_key_ref)
5076                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5077                 sctp_free_remote_addr(chk->whoTo);
5078                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5079                 SCTP_DECR_CHK_COUNT();
5080                 /* sa_ignore FREED_MEMORY */
5081         }
5082         /* ASCONF queue MAY not be empty */
5083         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5084                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5085                 if (chk->data) {
5086                         sctp_m_freem(chk->data);
5087                         chk->data = NULL;
5088                 }
5089                 if (chk->holds_key_ref)
5090                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5091                 sctp_free_remote_addr(chk->whoTo);
5092                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5093                 SCTP_DECR_CHK_COUNT();
5094                 /* sa_ignore FREED_MEMORY */
5095         }
5096         if (asoc->mapping_array) {
5097                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5098                 asoc->mapping_array = NULL;
5099         }
5100         if (asoc->nr_mapping_array) {
5101                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5102                 asoc->nr_mapping_array = NULL;
5103         }
5104         /* the stream outs */
5105         if (asoc->strmout) {
5106                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5107                 asoc->strmout = NULL;
5108         }
5109         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5110         if (asoc->strmin) {
5111                 for (i = 0; i < asoc->streamincnt; i++) {
5112                         sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5113                         sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5114                 }
5115                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5116                 asoc->strmin = NULL;
5117         }
5118         asoc->streamincnt = 0;
5119         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5120 #ifdef INVARIANTS
5121                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5122                         panic("no net's left alloc'ed, or list points to itself");
5123                 }
5124 #endif
5125                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5126                 sctp_free_remote_addr(net);
5127         }
5128         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5129                 /* sa_ignore FREED_MEMORY */
5130                 sctp_remove_laddr(laddr);
5131         }
5132
5133         /* pending asconf (address) parameters */
5134         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5135                 /* sa_ignore FREED_MEMORY */
5136                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5137                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5138         }
5139         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5140                 /* sa_ignore FREED_MEMORY */
5141                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5142                 if (aack->data != NULL) {
5143                         sctp_m_freem(aack->data);
5144                 }
5145                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5146         }
5147         /* clean up auth stuff */
5148         if (asoc->local_hmacs)
5149                 sctp_free_hmaclist(asoc->local_hmacs);
5150         if (asoc->peer_hmacs)
5151                 sctp_free_hmaclist(asoc->peer_hmacs);
5152
5153         if (asoc->local_auth_chunks)
5154                 sctp_free_chunklist(asoc->local_auth_chunks);
5155         if (asoc->peer_auth_chunks)
5156                 sctp_free_chunklist(asoc->peer_auth_chunks);
5157
5158         sctp_free_authinfo(&asoc->authinfo);
5159
5160         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5161                 LIST_REMOVE(shared_key, next);
5162                 sctp_free_sharedkey(shared_key);
5163                 /* sa_ignore FREED_MEMORY */
5164         }
5165
5166         /* Insert new items here :> */
5167
5168         /* Get rid of LOCK */
5169         SCTP_TCB_UNLOCK(stcb);
5170         SCTP_TCB_LOCK_DESTROY(stcb);
5171         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5172         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5173                 SCTP_INP_INFO_WUNLOCK();
5174                 SCTP_INP_RLOCK(inp);
5175         }
5176 #ifdef SCTP_TRACK_FREED_ASOCS
5177         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5178                 /* now clean up the tasoc itself */
5179                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5180                 SCTP_DECR_ASOC_COUNT();
5181         } else {
5182                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5183         }
5184 #else
5185         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5186         SCTP_DECR_ASOC_COUNT();
5187 #endif
5188         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5189                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5190                         /*
5191                          * If its NOT the inp_free calling us AND sctp_close
5192                          * as been called, we call back...
5193                          */
5194                         SCTP_INP_RUNLOCK(inp);
5195                         /*
5196                          * This will start the kill timer (if we are the
5197                          * last one) since we hold an increment yet. But
5198                          * this is the only safe way to do this since
5199                          * otherwise if the socket closes at the same time
5200                          * we are here we might collide in the cleanup.
5201                          */
5202                         sctp_inpcb_free(inp,
5203                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5204                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5205                         SCTP_INP_DECR_REF(inp);
5206                         goto out_of;
5207                 } else {
5208                         /* The socket is still open. */
5209                         SCTP_INP_DECR_REF(inp);
5210                 }
5211         }
5212         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5213                 SCTP_INP_RUNLOCK(inp);
5214         }
5215 out_of:
5216         /* destroyed the asoc */
5217 #ifdef SCTP_LOG_CLOSING
5218         sctp_log_closing(inp, NULL, 11);
5219 #endif
5220         return (1);
5221 }
5222
5223
5224
5225 /*
5226  * determine if a destination is "reachable" based upon the addresses bound
5227  * to the current endpoint (e.g. only v4 or v6 currently bound)
5228  */
5229 /*
5230  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5231  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5232  * types bound as its endpoint
5233  */
5234 int
5235 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5236 {
5237         struct sctp_inpcb *inp;
5238         int answer;
5239
5240         /*
5241          * No locks here, the TCB, in all cases is already locked and an
5242          * assoc is up. There is either a INP lock by the caller applied (in
5243          * asconf case when deleting an address) or NOT in the HB case,
5244          * however if HB then the INP increment is up and the INP will not
5245          * be removed (on top of the fact that we have a TCB lock). So we
5246          * only want to read the sctp_flags, which is either bound-all or
5247          * not.. no protection needed since once an assoc is up you can't be
5248          * changing your binding.
5249          */
5250         inp = stcb->sctp_ep;
5251         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5252                 /* if bound all, destination is not restricted */
5253                 /*
5254                  * RRS: Question during lock work: Is this correct? If you
5255                  * are bound-all you still might need to obey the V4--V6
5256                  * flags??? IMO this bound-all stuff needs to be removed!
5257                  */
5258                 return (1);
5259         }
5260         /* NOTE: all "scope" checks are done when local addresses are added */
5261         switch (destaddr->sa_family) {
5262 #ifdef INET6
5263         case AF_INET6:
5264                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5265                 break;
5266 #endif
5267 #ifdef INET
5268         case AF_INET:
5269                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5270                 break;
5271 #endif
5272         default:
5273                 /* invalid family, so it's unreachable */
5274                 answer = 0;
5275                 break;
5276         }
5277         return (answer);
5278 }
5279
5280 /*
5281  * update the inp_vflags on an endpoint
5282  */
5283 static void
5284 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5285 {
5286         struct sctp_laddr *laddr;
5287
5288         /* first clear the flag */
5289         inp->ip_inp.inp.inp_vflag = 0;
5290         /* set the flag based on addresses on the ep list */
5291         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5292                 if (laddr->ifa == NULL) {
5293                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5294                             __func__);
5295                         continue;
5296                 }
5297                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5298                         continue;
5299                 }
5300                 switch (laddr->ifa->address.sa.sa_family) {
5301 #ifdef INET6
5302                 case AF_INET6:
5303                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5304                         break;
5305 #endif
5306 #ifdef INET
5307                 case AF_INET:
5308                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5309                         break;
5310 #endif
5311                 default:
5312                         break;
5313                 }
5314         }
5315 }
5316
5317 /*
5318  * Add the address to the endpoint local address list There is nothing to be
5319  * done if we are bound to all addresses
5320  */
5321 void
5322 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5323 {
5324         struct sctp_laddr *laddr;
5325         struct sctp_tcb *stcb;
5326         int fnd, error = 0;
5327
5328         fnd = 0;
5329
5330         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5331                 /* You are already bound to all. You have it already */
5332                 return;
5333         }
5334 #ifdef INET6
5335         if (ifa->address.sa.sa_family == AF_INET6) {
5336                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5337                         /* Can't bind a non-useable addr. */
5338                         return;
5339                 }
5340         }
5341 #endif
5342         /* first, is it already present? */
5343         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5344                 if (laddr->ifa == ifa) {
5345                         fnd = 1;
5346                         break;
5347                 }
5348         }
5349
5350         if (fnd == 0) {
5351                 /* Not in the ep list */
5352                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5353                 if (error != 0)
5354                         return;
5355                 inp->laddr_count++;
5356                 /* update inp_vflag flags */
5357                 switch (ifa->address.sa.sa_family) {
5358 #ifdef INET6
5359                 case AF_INET6:
5360                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5361                         break;
5362 #endif
5363 #ifdef INET
5364                 case AF_INET:
5365                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5366                         break;
5367 #endif
5368                 default:
5369                         break;
5370                 }
5371                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5372                         sctp_add_local_addr_restricted(stcb, ifa);
5373                 }
5374         }
5375         return;
5376 }
5377
5378
5379 /*
5380  * select a new (hopefully reachable) destination net (should only be used
5381  * when we deleted an ep addr that is the only usable source address to reach
5382  * the destination net)
5383  */
5384 static void
5385 sctp_select_primary_destination(struct sctp_tcb *stcb)
5386 {
5387         struct sctp_nets *net;
5388
5389         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5390                 /* for now, we'll just pick the first reachable one we find */
5391                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5392                         continue;
5393                 if (sctp_destination_is_reachable(stcb,
5394                     (struct sockaddr *)&net->ro._l_addr)) {
5395                         /* found a reachable destination */
5396                         stcb->asoc.primary_destination = net;
5397                 }
5398         }
5399         /* I can't there from here! ...we're gonna die shortly... */
5400 }
5401
5402
5403 /*
5404  * Delete the address from the endpoint local address list. There is nothing
5405  * to be done if we are bound to all addresses
5406  */
5407 void
5408 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5409 {
5410         struct sctp_laddr *laddr;
5411         int fnd;
5412
5413         fnd = 0;
5414         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5415                 /* You are already bound to all. You have it already */
5416                 return;
5417         }
5418         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5419                 if (laddr->ifa == ifa) {
5420                         fnd = 1;
5421                         break;
5422                 }
5423         }
5424         if (fnd && (inp->laddr_count < 2)) {
5425                 /* can't delete unless there are at LEAST 2 addresses */
5426                 return;
5427         }
5428         if (fnd) {
5429                 /*
5430                  * clean up any use of this address go through our
5431                  * associations and clear any last_used_address that match
5432                  * this one for each assoc, see if a new primary_destination
5433                  * is needed
5434                  */
5435                 struct sctp_tcb *stcb;
5436
5437                 /* clean up "next_addr_touse" */
5438                 if (inp->next_addr_touse == laddr)
5439                         /* delete this address */
5440                         inp->next_addr_touse = NULL;
5441
5442                 /* clean up "last_used_address" */
5443                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5444                         struct sctp_nets *net;
5445
5446                         SCTP_TCB_LOCK(stcb);
5447                         if (stcb->asoc.last_used_address == laddr)
5448                                 /* delete this address */
5449                                 stcb->asoc.last_used_address = NULL;
5450                         /* Now spin through all the nets and purge any ref
5451                          * to laddr */
5452                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5453                                 if (net->ro._s_addr == laddr->ifa) {
5454                                         /* Yep, purge src address selected */
5455                                         sctp_rtentry_t *rt;
5456
5457                                         /* delete this address if cached */
5458                                         rt = net->ro.ro_rt;
5459                                         if (rt != NULL) {
5460                                                 RTFREE(rt);
5461                                                 net->ro.ro_rt = NULL;
5462                                         }
5463                                         sctp_free_ifa(net->ro._s_addr);
5464                                         net->ro._s_addr = NULL;
5465                                         net->src_addr_selected = 0;
5466                                 }
5467                         }
5468                         SCTP_TCB_UNLOCK(stcb);
5469                 }               /* for each tcb */
5470                 /* remove it from the ep list */
5471                 sctp_remove_laddr(laddr);
5472                 inp->laddr_count--;
5473                 /* update inp_vflag flags */
5474                 sctp_update_ep_vflag(inp);
5475         }
5476         return;
5477 }
5478
5479 /*
5480  * Add the address to the TCB local address restricted list.
5481  * This is a "pending" address list (eg. addresses waiting for an
5482  * ASCONF-ACK response) and cannot be used as a valid source address.
5483  */
5484 void
5485 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5486 {
5487         struct sctp_laddr *laddr;
5488         struct sctpladdr *list;
5489
5490         /*
5491          * Assumes TCB is locked.. and possibly the INP. May need to
5492          * confirm/fix that if we need it and is not the case.
5493          */
5494         list = &stcb->asoc.sctp_restricted_addrs;
5495
5496 #ifdef INET6
5497         if (ifa->address.sa.sa_family == AF_INET6) {
5498                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5499                         /* Can't bind a non-existent addr. */
5500                         return;
5501                 }
5502         }
5503 #endif
5504         /* does the address already exist? */
5505         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5506                 if (laddr->ifa == ifa) {
5507                         return;
5508                 }
5509         }
5510
5511         /* add to the list */
5512         (void)sctp_insert_laddr(list, ifa, 0);
5513         return;
5514 }
5515
5516 /*
5517  * Remove a local address from the TCB local address restricted list
5518  */
5519 void
5520 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5521 {
5522         struct sctp_inpcb *inp;
5523         struct sctp_laddr *laddr;
5524
5525         /*
5526          * This is called by asconf work. It is assumed that a) The TCB is
5527          * locked and b) The INP is locked. This is true in as much as I can
5528          * trace through the entry asconf code where I did these locks.
5529          * Again, the ASCONF code is a bit different in that it does lock
5530          * the INP during its work often times. This must be since we don't
5531          * want other proc's looking up things while what they are looking
5532          * up is changing :-D
5533          */
5534
5535         inp = stcb->sctp_ep;
5536         /* if subset bound and don't allow ASCONF's, can't delete last */
5537         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5538             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5539                 if (stcb->sctp_ep->laddr_count < 2) {
5540                         /* can't delete last address */
5541                         return;
5542                 }
5543         }
5544         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5545                 /* remove the address if it exists */
5546                 if (laddr->ifa == NULL)
5547                         continue;
5548                 if (laddr->ifa == ifa) {
5549                         sctp_remove_laddr(laddr);
5550                         return;
5551                 }
5552         }
5553
5554         /* address not found! */
5555         return;
5556 }
5557
5558 /*
5559  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5560  */
5561 /* sysctl */
5562 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5563 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5564
5565
5566
5567 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5568 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5569 int *sctp_cpuarry = NULL;
5570 void
5571 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5572 {
5573         /* Queue a packet to a processor for the specified core */
5574         struct sctp_mcore_queue *qent;
5575         struct sctp_mcore_ctrl *wkq;
5576         int need_wake = 0;
5577
5578         if (sctp_mcore_workers == NULL) {
5579                 /* Something went way bad during setup */
5580                 sctp_input_with_port(m, off, 0);
5581                 return;
5582         }
5583         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5584             (sizeof(struct sctp_mcore_queue)),
5585             SCTP_M_MCORE);
5586         if (qent == NULL) {
5587                 /* This is trouble  */
5588                 sctp_input_with_port(m, off, 0);
5589                 return;
5590         }
5591         qent->vn = curvnet;
5592         qent->m = m;
5593         qent->off = off;
5594         qent->v6 = 0;
5595         wkq = &sctp_mcore_workers[cpu_to_use];
5596         SCTP_MCORE_QLOCK(wkq);
5597
5598         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5599         if (wkq->running == 0) {
5600                 need_wake = 1;
5601         }
5602         SCTP_MCORE_QUNLOCK(wkq);
5603         if (need_wake) {
5604                 wakeup(&wkq->running);
5605         }
5606 }
5607
5608 static void
5609 sctp_mcore_thread(void *arg)
5610 {
5611
5612         struct sctp_mcore_ctrl *wkq;
5613         struct sctp_mcore_queue *qent;
5614
5615         wkq = (struct sctp_mcore_ctrl *)arg;
5616         struct mbuf *m;
5617         int off, v6;
5618
5619         /* Wait for first tickle */
5620         SCTP_MCORE_LOCK(wkq);
5621         wkq->running = 0;
5622         msleep(&wkq->running,
5623             &wkq->core_mtx,
5624             0, "wait for pkt", 0);
5625         SCTP_MCORE_UNLOCK(wkq);
5626
5627         /* Bind to our cpu */
5628         thread_lock(curthread);
5629         sched_bind(curthread, wkq->cpuid);
5630         thread_unlock(curthread);
5631
5632         /* Now lets start working */
5633         SCTP_MCORE_LOCK(wkq);
5634         /* Now grab lock and go */
5635         for (;;) {
5636                 SCTP_MCORE_QLOCK(wkq);
5637 skip_sleep:
5638                 wkq->running = 1;
5639                 qent = TAILQ_FIRST(&wkq->que);
5640                 if (qent) {
5641                         TAILQ_REMOVE(&wkq->que, qent, next);
5642                         SCTP_MCORE_QUNLOCK(wkq);
5643                         CURVNET_SET(qent->vn);
5644                         m = qent->m;
5645                         off = qent->off;
5646                         v6 = qent->v6;
5647                         SCTP_FREE(qent, SCTP_M_MCORE);
5648                         if (v6 == 0) {
5649                                 sctp_input_with_port(m, off, 0);
5650                         } else {
5651                                 SCTP_PRINTF("V6 not yet supported\n");
5652                                 sctp_m_freem(m);
5653                         }
5654                         CURVNET_RESTORE();
5655                         SCTP_MCORE_QLOCK(wkq);
5656                 }
5657                 wkq->running = 0;
5658                 if (!TAILQ_EMPTY(&wkq->que)) {
5659                         goto skip_sleep;
5660                 }
5661                 SCTP_MCORE_QUNLOCK(wkq);
5662                 msleep(&wkq->running,
5663                     &wkq->core_mtx,
5664                     0, "wait for pkt", 0);
5665         }
5666 }
5667
5668 static void
5669 sctp_startup_mcore_threads(void)
5670 {
5671         int i, cpu;
5672
5673         if (mp_ncpus == 1)
5674                 return;
5675
5676         if (sctp_mcore_workers != NULL) {
5677                 /*
5678                  * Already been here in some previous vnet?
5679                  */
5680                 return;
5681         }
5682         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5683             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5684             SCTP_M_MCORE);
5685         if (sctp_mcore_workers == NULL) {
5686                 /* TSNH I hope */
5687                 return;
5688         }
5689         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5690             sizeof(struct sctp_mcore_ctrl)));
5691         /* Init the structures */
5692         for (i = 0; i <= mp_maxid; i++) {
5693                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5694                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5695                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5696                 sctp_mcore_workers[i].cpuid = i;
5697         }
5698         if (sctp_cpuarry == NULL) {
5699                 SCTP_MALLOC(sctp_cpuarry, int *,
5700                     (mp_ncpus * sizeof(int)),
5701                     SCTP_M_MCORE);
5702                 i = 0;
5703                 CPU_FOREACH(cpu) {
5704                         sctp_cpuarry[i] = cpu;
5705                         i++;
5706                 }
5707         }
5708         /* Now start them all */
5709         CPU_FOREACH(cpu) {
5710                 (void)kproc_create(sctp_mcore_thread,
5711                     (void *)&sctp_mcore_workers[cpu],
5712                     &sctp_mcore_workers[cpu].thread_proc,
5713                     RFPROC,
5714                     SCTP_KTHREAD_PAGES,
5715                     SCTP_MCORE_NAME);
5716
5717         }
5718 }
5719 #endif
5720
5721 void
5722 sctp_pcb_init()
5723 {
5724         /*
5725          * SCTP initialization for the PCB structures should be called by
5726          * the sctp_init() function.
5727          */
5728         int i;
5729         struct timeval tv;
5730
5731         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5732                 /* error I was called twice */
5733                 return;
5734         }
5735         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5736
5737 #if defined(SCTP_LOCAL_TRACE_BUF)
5738         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5739 #endif
5740 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5741         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5742             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5743             SCTP_M_MCORE);
5744 #endif
5745         (void)SCTP_GETTIME_TIMEVAL(&tv);
5746 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5747         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5748         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5749         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5750 #else
5751         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5752         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5753         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5754 #endif
5755         /* init the empty list of (All) Endpoints */
5756         LIST_INIT(&SCTP_BASE_INFO(listhead));
5757
5758
5759         /* init the hash table of endpoints */
5760         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5761         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5762         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5763         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5764             &SCTP_BASE_INFO(hashasocmark));
5765         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5766             &SCTP_BASE_INFO(hashmark));
5767         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5768             &SCTP_BASE_INFO(hashtcpmark));
5769         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5770
5771
5772         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5773             &SCTP_BASE_INFO(hashvrfmark));
5774
5775         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5776             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5777         /* init the zones */
5778         /*
5779          * FIX ME: Should check for NULL returns, but if it does fail we are
5780          * doomed to panic anyways... add later maybe.
5781          */
5782         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5783             sizeof(struct sctp_inpcb), maxsockets);
5784
5785         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5786             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5787
5788         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5789             sizeof(struct sctp_laddr),
5790             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5791
5792         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5793             sizeof(struct sctp_nets),
5794             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5795
5796         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5797             sizeof(struct sctp_tmit_chunk),
5798             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5799
5800         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5801             sizeof(struct sctp_queued_to_read),
5802             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5803
5804         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5805             sizeof(struct sctp_stream_queue_pending),
5806             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5807
5808         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5809             sizeof(struct sctp_asconf),
5810             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5811
5812         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5813             sizeof(struct sctp_asconf_ack),
5814             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5815
5816
5817         /* Master Lock INIT for info structure */
5818         SCTP_INP_INFO_LOCK_INIT();
5819         SCTP_STATLOG_INIT_LOCK();
5820
5821         SCTP_IPI_COUNT_INIT();
5822         SCTP_IPI_ADDR_INIT();
5823 #ifdef SCTP_PACKET_LOGGING
5824         SCTP_IP_PKTLOG_INIT();
5825 #endif
5826         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5827
5828         SCTP_WQ_ADDR_INIT();
5829         /* not sure if we need all the counts */
5830         SCTP_BASE_INFO(ipi_count_ep) = 0;
5831         /* assoc/tcb zone info */
5832         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5833         /* local addrlist zone info */
5834         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5835         /* remote addrlist zone info */
5836         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5837         /* chunk info */
5838         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5839
5840         /* socket queue zone info */
5841         SCTP_BASE_INFO(ipi_count_readq) = 0;
5842
5843         /* stream out queue cont */
5844         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5845
5846         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5847         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5848
5849         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5850
5851         /* Init the TIMEWAIT list */
5852         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5853                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5854         }
5855         sctp_startup_iterator();
5856
5857 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5858         sctp_startup_mcore_threads();
5859 #endif
5860
5861         /*
5862          * INIT the default VRF which for BSD is the only one, other O/S's
5863          * may have more. But initially they must start with one and then
5864          * add the VRF's as addresses are added.
5865          */
5866         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5867 }
5868
5869 /*
5870  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5871  */
5872 void
5873 sctp_pcb_finish(void)
5874 {
5875         struct sctp_vrflist *vrf_bucket;
5876         struct sctp_vrf *vrf, *nvrf;
5877         struct sctp_ifn *ifn, *nifn;
5878         struct sctp_ifa *ifa, *nifa;
5879         struct sctpvtaghead *chain;
5880         struct sctp_tagblock *twait_block, *prev_twait_block;
5881         struct sctp_laddr *wi, *nwi;
5882         int i;
5883         struct sctp_iterator *it, *nit;
5884
5885         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5886                 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5887                 return;
5888         }
5889         SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5890         /*
5891          * In FreeBSD the iterator thread never exits but we do clean up.
5892          * The only way FreeBSD reaches here is if we have VRF's but we
5893          * still add the ifdef to make it compile on old versions.
5894          */
5895 retry:
5896         SCTP_IPI_ITERATOR_WQ_LOCK();
5897         /*
5898          * sctp_iterator_worker() might be working on an it entry without
5899          * holding the lock.  We won't find it on the list either and
5900          * continue and free/destroy it.  While holding the lock, spin, to
5901          * avoid the race condition as sctp_iterator_worker() will have to
5902          * wait to re-aquire the lock.
5903          */
5904         if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5905                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5906                 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5907                     "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5908                 DELAY(10);
5909                 goto retry;
5910         }
5911         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5912                 if (it->vn != curvnet) {
5913                         continue;
5914                 }
5915                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5916                 if (it->function_atend != NULL) {
5917                         (*it->function_atend) (it->pointer, it->val);
5918                 }
5919                 SCTP_FREE(it, SCTP_M_ITER);
5920         }
5921         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5922         SCTP_ITERATOR_LOCK();
5923         if ((sctp_it_ctl.cur_it) &&
5924             (sctp_it_ctl.cur_it->vn == curvnet)) {
5925                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5926         }
5927         SCTP_ITERATOR_UNLOCK();
5928         SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5929         SCTP_WQ_ADDR_LOCK();
5930         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5931                 LIST_REMOVE(wi, sctp_nxt_addr);
5932                 SCTP_DECR_LADDR_COUNT();
5933                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5934                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
5935                 }
5936                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5937         }
5938         SCTP_WQ_ADDR_UNLOCK();
5939
5940         /*
5941          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5942          * destroyed first).
5943          */
5944         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5945         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5946                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5947                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5948                                 /* free the ifa */
5949                                 LIST_REMOVE(ifa, next_bucket);
5950                                 LIST_REMOVE(ifa, next_ifa);
5951                                 SCTP_FREE(ifa, SCTP_M_IFA);
5952                         }
5953                         /* free the ifn */
5954                         LIST_REMOVE(ifn, next_bucket);
5955                         LIST_REMOVE(ifn, next_ifn);
5956                         SCTP_FREE(ifn, SCTP_M_IFN);
5957                 }
5958                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5959                 /* free the vrf */
5960                 LIST_REMOVE(vrf, next_vrf);
5961                 SCTP_FREE(vrf, SCTP_M_VRF);
5962         }
5963         /* free the vrf hashes */
5964         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5965         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5966
5967         /*
5968          * free the TIMEWAIT list elements malloc'd in the function
5969          * sctp_add_vtag_to_timewait()...
5970          */
5971         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5972                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5973                 if (!LIST_EMPTY(chain)) {
5974                         prev_twait_block = NULL;
5975                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5976                                 if (prev_twait_block) {
5977                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5978                                 }
5979                                 prev_twait_block = twait_block;
5980                         }
5981                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5982                 }
5983         }
5984
5985         /* free the locks and mutexes */
5986 #ifdef SCTP_PACKET_LOGGING
5987         SCTP_IP_PKTLOG_DESTROY();
5988 #endif
5989         SCTP_IPI_ADDR_DESTROY();
5990         SCTP_STATLOG_DESTROY();
5991         SCTP_INP_INFO_LOCK_DESTROY();
5992
5993         SCTP_WQ_ADDR_DESTROY();
5994
5995         /* Get rid of other stuff too. */
5996         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5997                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5998         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5999                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6000         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6001                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6002
6003         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6004         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6005         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6006         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6007         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6008         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6009         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6010         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6011         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6012 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6013         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6014 #endif
6015 }
6016
6017
6018 int
6019 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6020     int offset, int limit,
6021     struct sockaddr *src, struct sockaddr *dst,
6022     struct sockaddr *altsa, uint16_t port)
6023 {
6024         /*
6025          * grub through the INIT pulling addresses and loading them to the
6026          * nets structure in the asoc. The from address in the mbuf should
6027          * also be loaded (if it is not already). This routine can be called
6028          * with either INIT or INIT-ACK's as long as the m points to the IP
6029          * packet and the offset points to the beginning of the parameters.
6030          */
6031         struct sctp_inpcb *inp;
6032         struct sctp_nets *net, *nnet, *net_tmp;
6033         struct sctp_paramhdr *phdr, parm_buf;
6034         struct sctp_tcb *stcb_tmp;
6035         uint16_t ptype, plen;
6036         struct sockaddr *sa;
6037         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6038         struct sctp_auth_random *p_random = NULL;
6039         uint16_t random_len = 0;
6040         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6041         struct sctp_auth_hmac_algo *hmacs = NULL;
6042         uint16_t hmacs_len = 0;
6043         uint8_t saw_asconf = 0;
6044         uint8_t saw_asconf_ack = 0;
6045         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6046         struct sctp_auth_chunk_list *chunks = NULL;
6047         uint16_t num_chunks = 0;
6048         sctp_key_t *new_key;
6049         uint32_t keylen;
6050         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6051         uint8_t peer_supports_ecn;
6052         uint8_t peer_supports_prsctp;
6053         uint8_t peer_supports_auth;
6054         uint8_t peer_supports_asconf;
6055         uint8_t peer_supports_asconf_ack;
6056         uint8_t peer_supports_reconfig;
6057         uint8_t peer_supports_nrsack;
6058         uint8_t peer_supports_pktdrop;
6059         uint8_t peer_supports_idata;
6060 #ifdef INET
6061         struct sockaddr_in sin;
6062 #endif
6063 #ifdef INET6
6064         struct sockaddr_in6 sin6;
6065 #endif
6066
6067         /* First get the destination address setup too. */
6068 #ifdef INET
6069         memset(&sin, 0, sizeof(sin));
6070         sin.sin_family = AF_INET;
6071         sin.sin_len = sizeof(sin);
6072         sin.sin_port = stcb->rport;
6073 #endif
6074 #ifdef INET6
6075         memset(&sin6, 0, sizeof(sin6));
6076         sin6.sin6_family = AF_INET6;
6077         sin6.sin6_len = sizeof(struct sockaddr_in6);
6078         sin6.sin6_port = stcb->rport;
6079 #endif
6080         if (altsa) {
6081                 sa = altsa;
6082         } else {
6083                 sa = src;
6084         }
6085         peer_supports_idata = 0;
6086         peer_supports_ecn = 0;
6087         peer_supports_prsctp = 0;
6088         peer_supports_auth = 0;
6089         peer_supports_asconf = 0;
6090         peer_supports_reconfig = 0;
6091         peer_supports_nrsack = 0;
6092         peer_supports_pktdrop = 0;
6093         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6094                 /* mark all addresses that we have currently on the list */
6095                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6096         }
6097         /* does the source address already exist? if so skip it */
6098         inp = stcb->sctp_ep;
6099         atomic_add_int(&stcb->asoc.refcnt, 1);
6100         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6101         atomic_add_int(&stcb->asoc.refcnt, -1);
6102
6103         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6104                 /* we must add the source address */
6105                 /* no scope set here since we have a tcb already. */
6106                 switch (sa->sa_family) {
6107 #ifdef INET
6108                 case AF_INET:
6109                         if (stcb->asoc.scope.ipv4_addr_legal) {
6110                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6111                                         return (-1);
6112                                 }
6113                         }
6114                         break;
6115 #endif
6116 #ifdef INET6
6117                 case AF_INET6:
6118                         if (stcb->asoc.scope.ipv6_addr_legal) {
6119                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6120                                         return (-2);
6121                                 }
6122                         }
6123                         break;
6124 #endif
6125                 default:
6126                         break;
6127                 }
6128         } else {
6129                 if (net_tmp != NULL && stcb_tmp == stcb) {
6130                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6131                 } else if (stcb_tmp != stcb) {
6132                         /* It belongs to another association? */
6133                         if (stcb_tmp)
6134                                 SCTP_TCB_UNLOCK(stcb_tmp);
6135                         return (-3);
6136                 }
6137         }
6138         if (stcb->asoc.state == 0) {
6139                 /* the assoc was freed? */
6140                 return (-4);
6141         }
6142         /* now we must go through each of the params. */
6143         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6144         while (phdr) {
6145                 ptype = ntohs(phdr->param_type);
6146                 plen = ntohs(phdr->param_length);
6147                 /*
6148                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6149                  * (uint32_t)ptype, (int)plen);
6150                  */
6151                 if (offset + plen > limit) {
6152                         break;
6153                 }
6154                 if (plen == 0) {
6155                         break;
6156                 }
6157 #ifdef INET
6158                 if (ptype == SCTP_IPV4_ADDRESS) {
6159                         if (stcb->asoc.scope.ipv4_addr_legal) {
6160                                 struct sctp_ipv4addr_param *p4, p4_buf;
6161
6162                                 /* ok get the v4 address and check/add */
6163                                 phdr = sctp_get_next_param(m, offset,
6164                                     (struct sctp_paramhdr *)&p4_buf,
6165                                     sizeof(p4_buf));
6166                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6167                                     phdr == NULL) {
6168                                         return (-5);
6169                                 }
6170                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6171                                 sin.sin_addr.s_addr = p4->addr;
6172                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6173                                         /* Skip multi-cast addresses */
6174                                         goto next_param;
6175                                 }
6176                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6177                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6178                                         goto next_param;
6179                                 }
6180                                 sa = (struct sockaddr *)&sin;
6181                                 inp = stcb->sctp_ep;
6182                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6183                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6184                                     dst, stcb);
6185                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6186
6187                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6188                                     inp == NULL) {
6189                                         /* we must add the source address */
6190                                         /*
6191                                          * no scope set since we have a tcb
6192                                          * already
6193                                          */
6194
6195                                         /*
6196                                          * we must validate the state again
6197                                          * here
6198                                          */
6199                         add_it_now:
6200                                         if (stcb->asoc.state == 0) {
6201                                                 /* the assoc was freed? */
6202                                                 return (-7);
6203                                         }
6204                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6205                                                 return (-8);
6206                                         }
6207                                 } else if (stcb_tmp == stcb) {
6208                                         if (stcb->asoc.state == 0) {
6209                                                 /* the assoc was freed? */
6210                                                 return (-10);
6211                                         }
6212                                         if (net != NULL) {
6213                                                 /* clear flag */
6214                                                 net->dest_state &=
6215                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6216                                         }
6217                                 } else {
6218                                         /*
6219                                          * strange, address is in another
6220                                          * assoc? straighten out locks.
6221                                          */
6222                                         if (stcb_tmp) {
6223                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6224                                                         struct mbuf *op_err;
6225                                                         char msg[SCTP_DIAG_INFO_LEN];
6226
6227                                                         /* in setup state we
6228                                                          * abort this guy */
6229                                                         snprintf(msg, sizeof(msg),
6230                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6231                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6232                                                             msg);
6233                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6234                                                             stcb_tmp, op_err,
6235                                                             SCTP_SO_NOT_LOCKED);
6236                                                         goto add_it_now;
6237                                                 }
6238                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6239                                         }
6240                                         if (stcb->asoc.state == 0) {
6241                                                 /* the assoc was freed? */
6242                                                 return (-12);
6243                                         }
6244                                         return (-13);
6245                                 }
6246                         }
6247                 } else
6248 #endif
6249 #ifdef INET6
6250                 if (ptype == SCTP_IPV6_ADDRESS) {
6251                         if (stcb->asoc.scope.ipv6_addr_legal) {
6252                                 /* ok get the v6 address and check/add */
6253                                 struct sctp_ipv6addr_param *p6, p6_buf;
6254
6255                                 phdr = sctp_get_next_param(m, offset,
6256                                     (struct sctp_paramhdr *)&p6_buf,
6257                                     sizeof(p6_buf));
6258                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6259                                     phdr == NULL) {
6260                                         return (-14);
6261                                 }
6262                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6263                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6264                                     sizeof(p6->addr));
6265                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6266                                         /* Skip multi-cast addresses */
6267                                         goto next_param;
6268                                 }
6269                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6270                                         /* Link local make no sense without
6271                                          * scope */
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                                                         /* in setup state we
6323                                                          * abort this guy */
6324                                                         snprintf(msg, sizeof(msg),
6325                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6326                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6327                                                             msg);
6328                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6329                                                             stcb_tmp, op_err,
6330                                                             SCTP_SO_NOT_LOCKED);
6331                                                         goto add_it_now6;
6332                                                 }
6333                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6334                                         }
6335                                         if (stcb->asoc.state == 0) {
6336                                                 /* the assoc was freed? */
6337                                                 return (-21);
6338                                         }
6339                                         return (-22);
6340                                 }
6341                         }
6342                 } else
6343 #endif
6344                 if (ptype == SCTP_ECN_CAPABLE) {
6345                         peer_supports_ecn = 1;
6346                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6347                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6348                                 struct sctp_adaptation_layer_indication ai,
6349                                                                 *aip;
6350
6351                                 phdr = sctp_get_next_param(m, offset,
6352                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6353                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6354                                 if (aip) {
6355                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6356                                         stcb->asoc.adaptation_needed = 1;
6357                                 }
6358                         }
6359                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6360                         struct sctp_asconf_addr_param lstore, *fee;
6361                         int lptype;
6362                         struct sockaddr *lsa = NULL;
6363 #ifdef INET
6364                         struct sctp_asconf_addrv4_param *fii;
6365 #endif
6366
6367                         if (stcb->asoc.asconf_supported == 0) {
6368                                 return (-100);
6369                         }
6370                         if (plen > sizeof(lstore)) {
6371                                 return (-23);
6372                         }
6373                         phdr = sctp_get_next_param(m, offset,
6374                             (struct sctp_paramhdr *)&lstore,
6375                             min(plen, sizeof(lstore)));
6376                         if (phdr == NULL) {
6377                                 return (-24);
6378                         }
6379                         fee = (struct sctp_asconf_addr_param *)phdr;
6380                         lptype = ntohs(fee->addrp.ph.param_type);
6381                         switch (lptype) {
6382 #ifdef INET
6383                         case SCTP_IPV4_ADDRESS:
6384                                 if (plen !=
6385                                     sizeof(struct sctp_asconf_addrv4_param)) {
6386                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6387                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6388                                             plen);
6389                                 } else {
6390                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6391                                         sin.sin_addr.s_addr = fii->addrp.addr;
6392                                         lsa = (struct sockaddr *)&sin;
6393                                 }
6394                                 break;
6395 #endif
6396 #ifdef INET6
6397                         case SCTP_IPV6_ADDRESS:
6398                                 if (plen !=
6399                                     sizeof(struct sctp_asconf_addr_param)) {
6400                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6401                                             (int)sizeof(struct sctp_asconf_addr_param),
6402                                             plen);
6403                                 } else {
6404                                         memcpy(sin6.sin6_addr.s6_addr,
6405                                             fee->addrp.addr,
6406                                             sizeof(fee->addrp.addr));
6407                                         lsa = (struct sockaddr *)&sin6;
6408                                 }
6409                                 break;
6410 #endif
6411                         default:
6412                                 break;
6413                         }
6414                         if (lsa) {
6415                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6416                         }
6417                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6418                         stcb->asoc.peer_supports_nat = 1;
6419                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6420                         /* Peer supports pr-sctp */
6421                         peer_supports_prsctp = 1;
6422                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6423                         /* A supported extension chunk */
6424                         struct sctp_supported_chunk_types_param *pr_supported;
6425                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6426                         int num_ent, i;
6427
6428                         phdr = sctp_get_next_param(m, offset,
6429                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6430                         if (phdr == NULL) {
6431                                 return (-25);
6432                         }
6433                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6434                         num_ent = plen - sizeof(struct sctp_paramhdr);
6435                         for (i = 0; i < num_ent; i++) {
6436                                 switch (pr_supported->chunk_types[i]) {
6437                                 case SCTP_ASCONF:
6438                                         peer_supports_asconf = 1;
6439                                         break;
6440                                 case SCTP_ASCONF_ACK:
6441                                         peer_supports_asconf_ack = 1;
6442                                         break;
6443                                 case SCTP_FORWARD_CUM_TSN:
6444                                         peer_supports_prsctp = 1;
6445                                         break;
6446                                 case SCTP_PACKET_DROPPED:
6447                                         peer_supports_pktdrop = 1;
6448                                         break;
6449                                 case SCTP_NR_SELECTIVE_ACK:
6450                                         peer_supports_nrsack = 1;
6451                                         break;
6452                                 case SCTP_STREAM_RESET:
6453                                         peer_supports_reconfig = 1;
6454                                         break;
6455                                 case SCTP_AUTHENTICATION:
6456                                         peer_supports_auth = 1;
6457                                         break;
6458                                 case SCTP_IDATA:
6459                                         peer_supports_idata = 1;
6460                                         break;
6461                                 default:
6462                                         /* one I have not learned yet */
6463                                         break;
6464
6465                                 }
6466                         }
6467                 } else if (ptype == SCTP_RANDOM) {
6468                         if (plen > sizeof(random_store))
6469                                 break;
6470                         if (got_random) {
6471                                 /* already processed a RANDOM */
6472                                 goto next_param;
6473                         }
6474                         phdr = sctp_get_next_param(m, offset,
6475                             (struct sctp_paramhdr *)random_store,
6476                             min(sizeof(random_store), plen));
6477                         if (phdr == NULL)
6478                                 return (-26);
6479                         p_random = (struct sctp_auth_random *)phdr;
6480                         random_len = plen - sizeof(*p_random);
6481                         /* enforce the random length */
6482                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6483                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6484                                 return (-27);
6485                         }
6486                         got_random = 1;
6487                 } else if (ptype == SCTP_HMAC_LIST) {
6488                         uint16_t num_hmacs;
6489                         uint16_t i;
6490
6491                         if (plen > sizeof(hmacs_store))
6492                                 break;
6493                         if (got_hmacs) {
6494                                 /* already processed a HMAC list */
6495                                 goto next_param;
6496                         }
6497                         phdr = sctp_get_next_param(m, offset,
6498                             (struct sctp_paramhdr *)hmacs_store,
6499                             min(plen, sizeof(hmacs_store)));
6500                         if (phdr == NULL)
6501                                 return (-28);
6502                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6503                         hmacs_len = plen - sizeof(*hmacs);
6504                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6505                         /* validate the hmac list */
6506                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6507                                 return (-29);
6508                         }
6509                         if (stcb->asoc.peer_hmacs != NULL)
6510                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6511                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6512                         if (stcb->asoc.peer_hmacs != NULL) {
6513                                 for (i = 0; i < num_hmacs; i++) {
6514                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6515                                             ntohs(hmacs->hmac_ids[i]));
6516                                 }
6517                         }
6518                         got_hmacs = 1;
6519                 } else if (ptype == SCTP_CHUNK_LIST) {
6520                         int i;
6521
6522                         if (plen > sizeof(chunks_store))
6523                                 break;
6524                         if (got_chklist) {
6525                                 /* already processed a Chunks list */
6526                                 goto next_param;
6527                         }
6528                         phdr = sctp_get_next_param(m, offset,
6529                             (struct sctp_paramhdr *)chunks_store,
6530                             min(plen, sizeof(chunks_store)));
6531                         if (phdr == NULL)
6532                                 return (-30);
6533                         chunks = (struct sctp_auth_chunk_list *)phdr;
6534                         num_chunks = plen - sizeof(*chunks);
6535                         if (stcb->asoc.peer_auth_chunks != NULL)
6536                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6537                         else
6538                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6539                         for (i = 0; i < num_chunks; i++) {
6540                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6541                                     stcb->asoc.peer_auth_chunks);
6542                                 /* record asconf/asconf-ack if listed */
6543                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6544                                         saw_asconf = 1;
6545                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6546                                         saw_asconf_ack = 1;
6547
6548                         }
6549                         got_chklist = 1;
6550                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6551                             (ptype == SCTP_STATE_COOKIE) ||
6552                             (ptype == SCTP_UNRECOG_PARAM) ||
6553                             (ptype == SCTP_COOKIE_PRESERVE) ||
6554                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6555                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6556                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6557                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6558                     (ptype == SCTP_SUCCESS_REPORT)) {
6559                          /* don't care */ ;
6560                 } else {
6561                         if ((ptype & 0x8000) == 0x0000) {
6562                                 /*
6563                                  * must stop processing the rest of the
6564                                  * param's. Any report bits were handled
6565                                  * with the call to
6566                                  * sctp_arethere_unrecognized_parameters()
6567                                  * when the INIT or INIT-ACK was first seen.
6568                                  */
6569                                 break;
6570                         }
6571                 }
6572
6573 next_param:
6574                 offset += SCTP_SIZE32(plen);
6575                 if (offset >= limit) {
6576                         break;
6577                 }
6578                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6579                     sizeof(parm_buf));
6580         }
6581         /* Now check to see if we need to purge any addresses */
6582         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6583                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6584                     SCTP_ADDR_NOT_IN_ASSOC) {
6585                         /* This address has been removed from the asoc */
6586                         /* remove and free it */
6587                         stcb->asoc.numnets--;
6588                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6589                         sctp_free_remote_addr(net);
6590                         if (net == stcb->asoc.primary_destination) {
6591                                 stcb->asoc.primary_destination = NULL;
6592                                 sctp_select_primary_destination(stcb);
6593                         }
6594                 }
6595         }
6596         if ((stcb->asoc.ecn_supported == 1) &&
6597             (peer_supports_ecn == 0)) {
6598                 stcb->asoc.ecn_supported = 0;
6599         }
6600         if ((stcb->asoc.prsctp_supported == 1) &&
6601             (peer_supports_prsctp == 0)) {
6602                 stcb->asoc.prsctp_supported = 0;
6603         }
6604         if ((stcb->asoc.auth_supported == 1) &&
6605             ((peer_supports_auth == 0) ||
6606             (got_random == 0) || (got_hmacs == 0))) {
6607                 stcb->asoc.auth_supported = 0;
6608         }
6609         if ((stcb->asoc.asconf_supported == 1) &&
6610             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6611             (stcb->asoc.auth_supported == 0) ||
6612             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6613                 stcb->asoc.asconf_supported = 0;
6614         }
6615         if ((stcb->asoc.reconfig_supported == 1) &&
6616             (peer_supports_reconfig == 0)) {
6617                 stcb->asoc.reconfig_supported = 0;
6618         }
6619         if ((stcb->asoc.idata_supported == 1) &&
6620             (peer_supports_idata == 0)) {
6621                 stcb->asoc.idata_supported = 0;
6622         }
6623         if ((stcb->asoc.nrsack_supported == 1) &&
6624             (peer_supports_nrsack == 0)) {
6625                 stcb->asoc.nrsack_supported = 0;
6626         }
6627         if ((stcb->asoc.pktdrop_supported == 1) &&
6628             (peer_supports_pktdrop == 0)) {
6629                 stcb->asoc.pktdrop_supported = 0;
6630         }
6631         /* validate authentication required parameters */
6632         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6633                 /* peer does not support auth but sent a chunks list? */
6634                 return (-31);
6635         }
6636         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6637                 /* peer supports asconf but not auth? */
6638                 return (-32);
6639         } else if ((peer_supports_asconf == 1) &&
6640                     (peer_supports_auth == 1) &&
6641             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6642                 return (-33);
6643         }
6644         /* concatenate the full random key */
6645         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6646         if (chunks != NULL) {
6647                 keylen += sizeof(*chunks) + num_chunks;
6648         }
6649         new_key = sctp_alloc_key(keylen);
6650         if (new_key != NULL) {
6651                 /* copy in the RANDOM */
6652                 if (p_random != NULL) {
6653                         keylen = sizeof(*p_random) + random_len;
6654                         bcopy(p_random, new_key->key, keylen);
6655                 }
6656                 /* append in the AUTH chunks */
6657                 if (chunks != NULL) {
6658                         bcopy(chunks, new_key->key + keylen,
6659                             sizeof(*chunks) + num_chunks);
6660                         keylen += sizeof(*chunks) + num_chunks;
6661                 }
6662                 /* append in the HMACs */
6663                 if (hmacs != NULL) {
6664                         bcopy(hmacs, new_key->key + keylen,
6665                             sizeof(*hmacs) + hmacs_len);
6666                 }
6667         } else {
6668                 /* failed to get memory for the key */
6669                 return (-34);
6670         }
6671         if (stcb->asoc.authinfo.peer_random != NULL)
6672                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6673         stcb->asoc.authinfo.peer_random = new_key;
6674         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6675         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6676
6677         return (0);
6678 }
6679
6680 int
6681 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6682     struct sctp_nets *net)
6683 {
6684         /* make sure the requested primary address exists in the assoc */
6685         if (net == NULL && sa)
6686                 net = sctp_findnet(stcb, sa);
6687
6688         if (net == NULL) {
6689                 /* didn't find the requested primary address! */
6690                 return (-1);
6691         } else {
6692                 /* set the primary address */
6693                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6694                         /* Must be confirmed, so queue to set */
6695                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6696                         return (0);
6697                 }
6698                 stcb->asoc.primary_destination = net;
6699                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6700                         sctp_free_remote_addr(stcb->asoc.alternate);
6701                         stcb->asoc.alternate = NULL;
6702                 }
6703                 net = TAILQ_FIRST(&stcb->asoc.nets);
6704                 if (net != stcb->asoc.primary_destination) {
6705                         /*
6706                          * first one on the list is NOT the primary
6707                          * sctp_cmpaddr() is much more efficient if the
6708                          * primary is the first on the list, make it so.
6709                          */
6710                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6711                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6712                 }
6713                 return (0);
6714         }
6715 }
6716
6717 int
6718 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6719 {
6720         /*
6721          * This function serves two purposes. It will see if a TAG can be
6722          * re-used and return 1 for yes it is ok and 0 for don't use that
6723          * tag. A secondary function it will do is purge out old tags that
6724          * can be removed.
6725          */
6726         struct sctpvtaghead *chain;
6727         struct sctp_tagblock *twait_block;
6728         struct sctpasochead *head;
6729         struct sctp_tcb *stcb;
6730         int i;
6731
6732         SCTP_INP_INFO_RLOCK();
6733         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6734             SCTP_BASE_INFO(hashasocmark))];
6735         LIST_FOREACH(stcb, head, sctp_asocs) {
6736                 /*
6737                  * We choose not to lock anything here. TCB's can't be
6738                  * removed since we have the read lock, so they can't be
6739                  * freed on us, same thing for the INP. I may be wrong with
6740                  * this assumption, but we will go with it for now :-)
6741                  */
6742                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6743                         continue;
6744                 }
6745                 if (stcb->asoc.my_vtag == tag) {
6746                         /* candidate */
6747                         if (stcb->rport != rport) {
6748                                 continue;
6749                         }
6750                         if (stcb->sctp_ep->sctp_lport != lport) {
6751                                 continue;
6752                         }
6753                         /* Its a used tag set */
6754                         SCTP_INP_INFO_RUNLOCK();
6755                         return (0);
6756                 }
6757         }
6758         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6759         /* Now what about timed wait ? */
6760         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6761                 /*
6762                  * Block(s) are present, lets see if we have this tag in the
6763                  * list
6764                  */
6765                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6766                         if (twait_block->vtag_block[i].v_tag == 0) {
6767                                 /* not used */
6768                                 continue;
6769                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6770                             now->tv_sec) {
6771                                 /* Audit expires this guy */
6772                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6773                                 twait_block->vtag_block[i].v_tag = 0;
6774                                 twait_block->vtag_block[i].lport = 0;
6775                                 twait_block->vtag_block[i].rport = 0;
6776                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6777                                     (twait_block->vtag_block[i].lport == lport) &&
6778                             (twait_block->vtag_block[i].rport == rport)) {
6779                                 /* Bad tag, sorry :< */
6780                                 SCTP_INP_INFO_RUNLOCK();
6781                                 return (0);
6782                         }
6783                 }
6784         }
6785         SCTP_INP_INFO_RUNLOCK();
6786         return (1);
6787 }
6788
6789 static void
6790 sctp_drain_mbufs(struct sctp_tcb *stcb)
6791 {
6792         /*
6793          * We must hunt this association for MBUF's past the cumack (i.e.
6794          * out of order data that we can renege on).
6795          */
6796         struct sctp_association *asoc;
6797         struct sctp_tmit_chunk *chk, *nchk;
6798         uint32_t cumulative_tsn_p1;
6799         struct sctp_queued_to_read *ctl, *nctl;
6800         int cnt, strmat;
6801         uint32_t gap, i;
6802         int fnd = 0;
6803
6804         /* We look for anything larger than the cum-ack + 1 */
6805
6806         asoc = &stcb->asoc;
6807         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6808                 /* none we can reneg on. */
6809                 return;
6810         }
6811         SCTP_STAT_INCR(sctps_protocol_drains_done);
6812         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6813         cnt = 0;
6814         /* Ok that was fun, now we will drain all the inbound streams? */
6815         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6816                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next_instrm, nctl) {
6817 #ifdef INVARIANTS
6818                         if (ctl->on_strm_q != SCTP_ON_ORDERED) {
6819                                 panic("Huh control: %p on_q: %d -- not ordered?",
6820                                     ctl, ctl->on_strm_q);
6821                         }
6822 #endif
6823                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6824                                 /* Yep it is above cum-ack */
6825                                 cnt++;
6826                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6827                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6828                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6829                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6830                                 if (ctl->on_read_q) {
6831                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, ctl, next);
6832                                         ctl->on_read_q = 0;
6833                                 }
6834                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next_instrm);
6835                                 ctl->on_strm_q = 0;
6836                                 if (ctl->data) {
6837                                         sctp_m_freem(ctl->data);
6838                                         ctl->data = NULL;
6839                                 }
6840                                 sctp_free_remote_addr(ctl->whoFrom);
6841                                 /* Now its reasm? */
6842                                 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) {
6843                                         cnt++;
6844                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6845                                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6846                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6847                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6848                                         TAILQ_REMOVE(&ctl->reasm, chk, sctp_next);
6849                                         if (chk->data) {
6850                                                 sctp_m_freem(chk->data);
6851                                                 chk->data = NULL;
6852                                         }
6853                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6854                                 }
6855                                 sctp_free_a_readq(stcb, ctl);
6856                         }
6857                 }
6858                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].uno_inqueue, next_instrm, nctl) {
6859 #ifdef INVARIANTS
6860                         if (ctl->on_strm_q != SCTP_ON_UNORDERED) {
6861                                 panic("Huh control: %p on_q: %d -- not unordered?",
6862                                     ctl, ctl->on_strm_q);
6863                         }
6864 #endif
6865                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6866                                 /* Yep it is above cum-ack */
6867                                 cnt++;
6868                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6869                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6870                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6871                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6872                                 if (ctl->on_read_q) {
6873                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, ctl, next);
6874                                         ctl->on_read_q = 0;
6875                                 }
6876                                 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, ctl, next_instrm);
6877                                 ctl->on_strm_q = 0;
6878                                 if (ctl->data) {
6879                                         sctp_m_freem(ctl->data);
6880                                         ctl->data = NULL;
6881                                 }
6882                                 sctp_free_remote_addr(ctl->whoFrom);
6883                                 /* Now its reasm? */
6884                                 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) {
6885                                         cnt++;
6886                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6887                                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6888                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6889                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6890                                         TAILQ_REMOVE(&ctl->reasm, chk, sctp_next);
6891                                         if (chk->data) {
6892                                                 sctp_m_freem(chk->data);
6893                                                 chk->data = NULL;
6894                                         }
6895                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6896                                 }
6897                                 sctp_free_a_readq(stcb, ctl);
6898                         }
6899                 }
6900         }
6901         if (cnt) {
6902                 /* We must back down to see what the new highest is */
6903                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6904                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6905                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6906                                 asoc->highest_tsn_inside_map = i;
6907                                 fnd = 1;
6908                                 break;
6909                         }
6910                 }
6911                 if (!fnd) {
6912                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6913                 }
6914                 /*
6915                  * Question, should we go through the delivery queue? The
6916                  * only reason things are on here is the app not reading OR
6917                  * a p-d-api up. An attacker COULD send enough in to
6918                  * initiate the PD-API and then send a bunch of stuff to
6919                  * other streams... these would wind up on the delivery
6920                  * queue.. and then we would not get to them. But in order
6921                  * to do this I then have to back-track and un-deliver
6922                  * sequence numbers in streams.. el-yucko. I think for now
6923                  * we will NOT look at the delivery queue and leave it to be
6924                  * something to consider later. An alternative would be to
6925                  * abort the P-D-API with a notification and then deliver
6926                  * the data.... Or another method might be to keep track of
6927                  * how many times the situation occurs and if we see a
6928                  * possible attack underway just abort the association.
6929                  */
6930 #ifdef SCTP_DEBUG
6931                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6932 #endif
6933                 /*
6934                  * Now do we need to find a new
6935                  * asoc->highest_tsn_inside_map?
6936                  */
6937                 asoc->last_revoke_count = cnt;
6938                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6939                 /* sa_ignore NO_NULL_CHK */
6940                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6941                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6942         }
6943         /*
6944          * Another issue, in un-setting the TSN's in the mapping array we
6945          * DID NOT adjust the highest_tsn marker.  This will cause one of
6946          * two things to occur. It may cause us to do extra work in checking
6947          * for our mapping array movement. More importantly it may cause us
6948          * to SACK every datagram. This may not be a bad thing though since
6949          * we will recover once we get our cum-ack above and all this stuff
6950          * we dumped recovered.
6951          */
6952 }
6953
6954 void
6955 sctp_drain()
6956 {
6957         /*
6958          * We must walk the PCB lists for ALL associations here. The system
6959          * is LOW on MBUF's and needs help. This is where reneging will
6960          * occur. We really hope this does NOT happen!
6961          */
6962         VNET_ITERATOR_DECL(vnet_iter);
6963         VNET_LIST_RLOCK_NOSLEEP();
6964         VNET_FOREACH(vnet_iter) {
6965                 CURVNET_SET(vnet_iter);
6966                 struct sctp_inpcb *inp;
6967                 struct sctp_tcb *stcb;
6968
6969                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6970                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6971 #ifdef VIMAGE
6972                         continue;
6973 #else
6974                         return;
6975 #endif
6976                 }
6977                 SCTP_INP_INFO_RLOCK();
6978                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6979                         /* For each endpoint */
6980                         SCTP_INP_RLOCK(inp);
6981                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6982                                 /* For each association */
6983                                 SCTP_TCB_LOCK(stcb);
6984                                 sctp_drain_mbufs(stcb);
6985                                 SCTP_TCB_UNLOCK(stcb);
6986                         }
6987                         SCTP_INP_RUNLOCK(inp);
6988                 }
6989                 SCTP_INP_INFO_RUNLOCK();
6990                 CURVNET_RESTORE();
6991         }
6992         VNET_LIST_RUNLOCK_NOSLEEP();
6993 }
6994
6995 /*
6996  * start a new iterator
6997  * iterates through all endpoints and associations based on the pcb_state
6998  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6999  * assocs and "ef" (optional) is executed when the iterator completes.
7000  * "inpf" (optional) is executed for each new endpoint as it is being
7001  * iterated through. inpe (optional) is called when the inp completes
7002  * its way through all the stcbs.
7003  */
7004 int
7005 sctp_initiate_iterator(inp_func inpf,
7006     asoc_func af,
7007     inp_func inpe,
7008     uint32_t pcb_state,
7009     uint32_t pcb_features,
7010     uint32_t asoc_state,
7011     void *argp,
7012     uint32_t argi,
7013     end_func ef,
7014     struct sctp_inpcb *s_inp,
7015     uint8_t chunk_output_off)
7016 {
7017         struct sctp_iterator *it = NULL;
7018
7019         if (af == NULL) {
7020                 return (-1);
7021         }
7022         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7023                 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7024                     SCTP_BASE_VAR(sctp_pcb_initialized));
7025                 return (-1);
7026         }
7027         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7028             SCTP_M_ITER);
7029         if (it == NULL) {
7030                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7031                 return (ENOMEM);
7032         }
7033         memset(it, 0, sizeof(*it));
7034         it->function_assoc = af;
7035         it->function_inp = inpf;
7036         if (inpf)
7037                 it->done_current_ep = 0;
7038         else
7039                 it->done_current_ep = 1;
7040         it->function_atend = ef;
7041         it->pointer = argp;
7042         it->val = argi;
7043         it->pcb_flags = pcb_state;
7044         it->pcb_features = pcb_features;
7045         it->asoc_state = asoc_state;
7046         it->function_inp_end = inpe;
7047         it->no_chunk_output = chunk_output_off;
7048         it->vn = curvnet;
7049         if (s_inp) {
7050                 /* Assume lock is held here */
7051                 it->inp = s_inp;
7052                 SCTP_INP_INCR_REF(it->inp);
7053                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7054         } else {
7055                 SCTP_INP_INFO_RLOCK();
7056                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7057                 if (it->inp) {
7058                         SCTP_INP_INCR_REF(it->inp);
7059                 }
7060                 SCTP_INP_INFO_RUNLOCK();
7061                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7062
7063         }
7064         SCTP_IPI_ITERATOR_WQ_LOCK();
7065         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7066                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7067                 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7068                     SCTP_BASE_VAR(sctp_pcb_initialized), it);
7069                 SCTP_FREE(it, SCTP_M_ITER);
7070                 return (-1);
7071         }
7072         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7073         if (sctp_it_ctl.iterator_running == 0) {
7074                 sctp_wakeup_iterator();
7075         }
7076         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7077         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7078         return (0);
7079 }