sys/netinet/sctp_pcb.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
   5  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
   6  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are met:
  10  *
  11  * a) Redistributions of source code must retain the above copyright notice,
  12  *    this list of conditions and the following disclaimer.
  13  *
  14  * b) Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the distribution.
  17  *
  18  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  19  *    contributors may be used to endorse or promote products derived
  20  *    from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  24  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  26  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  32  * THE POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 __FBSDID("$FreeBSD$");
  37
  38 #include <netinet/sctp_os.h>
  39 #include <sys/proc.h>
  40 #include <netinet/sctp_var.h>
  41 #include <netinet/sctp_sysctl.h>
  42 #include <netinet/sctp_pcb.h>
  43 #include <netinet/sctputil.h>
  44 #include <netinet/sctp.h>
  45 #include <netinet/sctp_header.h>
  46 #include <netinet/sctp_asconf.h>
  47 #include <netinet/sctp_output.h>
  48 #include <netinet/sctp_timer.h>
  49 #include <netinet/sctp_bsd_addr.h>
  50 #if defined(INET) || defined(INET6)
  51 #include <netinet/udp.h>
  52 #endif
  53 #ifdef INET6
  54 #include <netinet6/ip6_var.h>
  55 #endif
  56 #include <sys/sched.h>
  57 #include <sys/smp.h>
  58 #include <sys/unistd.h>
  59
  60 /* FIX: we don't handle multiple link local scopes */
  61 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  62 #ifdef INET6
  63 int
  64 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  65 {
  66         struct sockaddr_in6 tmp_a, tmp_b;
  67
  68         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  69         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  70                 return (0);
  71         }
  72         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  73         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  74                 return (0);
  75         }
  76         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  77 }
  78 #endif
  79
  80 void
  81 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  82 {
  83         /*
  84          * We really don't need to lock this, but I will just because it
  85          * does not hurt.
  86          */
  87         SCTP_INP_INFO_RLOCK();
  88         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  89         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  90         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  91         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  92         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  93         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  94         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  95         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
  96         SCTP_INP_INFO_RUNLOCK();
  97 }
  98
  99 /*-
 100  * Addresses are added to VRF's (Virtual Router's). For BSD we
 101  * have only the default VRF 0. We maintain a hash list of
 102  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
 103  * these has a list of addresses. When we add a new address
 104  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 105  * not exist we create it and add it to the list of IFN's
 106  * within the VRF. Once we have the sctp_ifn, we add the
 107  * address to the list. So we look something like:
 108  *
 109  * hash-vrf-table
 110  *   vrf-> ifn-> ifn -> ifn
 111  *   vrf    |
 112  *    ...   +--ifa-> ifa -> ifa
 113  *   vrf
 114  *
 115  * We keep these separate lists since the SCTP subsystem will
 116  * point to these from its source address selection nets structure.
 117  * When an address is deleted it does not happen right away on
 118  * the SCTP side, it gets scheduled. What we do when a
 119  * delete happens is immediately remove the address from
 120  * the master list and decrement the refcount. As our
 121  * addip iterator works through and frees the src address
 122  * selection pointing to the sctp_ifa, eventually the refcount
 123  * will reach 0 and we will delete it. Note that it is assumed
 124  * that any locking on system level ifn/ifa is done at the
 125  * caller of these functions and these routines will only
 126  * lock the SCTP structures as they add or delete things.
 127  *
 128  * Other notes on VRF concepts.
 129  *  - An endpoint can be in multiple VRF's
 130  *  - An association lives within a VRF and only one VRF.
 131  *  - Any incoming packet we can deduce the VRF for by
 132  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 133  *  - Any downward send call or connect call must supply the
 134  *    VRF via ancillary data or via some sort of set default
 135  *    VRF socket option call (again for BSD no brainer since
 136  *    the VRF is always 0).
 137  *  - An endpoint may add multiple VRF's to it.
 138  *  - Listening sockets can accept associations in any
 139  *    of the VRF's they are in but the assoc will end up
 140  *    in only one VRF (gotten from the packet or connect/send).
 141  *
 142  */
 143
 144 struct sctp_vrf *
 145 sctp_allocate_vrf(int vrf_id)
 146 {
 147         struct sctp_vrf *vrf = NULL;
 148         struct sctp_vrflist *bucket;
 149
 150         /* First allocate the VRF structure */
 151         vrf = sctp_find_vrf(vrf_id);
 152         if (vrf) {
 153                 /* Already allocated */
 154                 return (vrf);
 155         }
 156         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 157             SCTP_M_VRF);
 158         if (vrf == NULL) {
 159                 /* No memory */
 160 #ifdef INVARIANTS
 161                 panic("No memory for VRF:%d", vrf_id);
 162 #endif
 163                 return (NULL);
 164         }
 165         /* setup the VRF */
 166         memset(vrf, 0, sizeof(struct sctp_vrf));
 167         vrf->vrf_id = vrf_id;
 168         LIST_INIT(&vrf->ifnlist);
 169         vrf->total_ifa_count = 0;
 170         vrf->refcount = 0;
 171         /* now also setup table ids */
 172         SCTP_INIT_VRF_TABLEID(vrf);
 173         /* Init the HASH of addresses */
 174         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 175             &vrf->vrf_addr_hashmark);
 176         if (vrf->vrf_addr_hash == NULL) {
 177                 /* No memory */
 178 #ifdef INVARIANTS
 179                 panic("No memory for VRF:%d", vrf_id);
 180 #endif
 181                 SCTP_FREE(vrf, SCTP_M_VRF);
 182                 return (NULL);
 183         }
 184
 185         /* Add it to the hash table */
 186         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 187         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 188         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 189         return (vrf);
 190 }
 191
 192
 193 struct sctp_ifn *
 194 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 195 {
 196         struct sctp_ifn *sctp_ifnp;
 197         struct sctp_ifnlist *hash_ifn_head;
 198
 199         /*
 200          * We assume the lock is held for the addresses if that's wrong
 201          * problems could occur :-)
 202          */
 203         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 204         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 205                 if (sctp_ifnp->ifn_index == ifn_index) {
 206                         return (sctp_ifnp);
 207                 }
 208                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 209                         return (sctp_ifnp);
 210                 }
 211         }
 212         return (NULL);
 213 }
 214
 215
 216 struct sctp_vrf *
 217 sctp_find_vrf(uint32_t vrf_id)
 218 {
 219         struct sctp_vrflist *bucket;
 220         struct sctp_vrf *liste;
 221
 222         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 223         LIST_FOREACH(liste, bucket, next_vrf) {
 224                 if (vrf_id == liste->vrf_id) {
 225                         return (liste);
 226                 }
 227         }
 228         return (NULL);
 229 }
 230
 231
 232 void
 233 sctp_free_vrf(struct sctp_vrf *vrf)
 234 {
 235         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 236                 if (vrf->vrf_addr_hash) {
 237                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 238                         vrf->vrf_addr_hash = NULL;
 239                 }
 240                 /* We zero'd the count */
 241                 LIST_REMOVE(vrf, next_vrf);
 242                 SCTP_FREE(vrf, SCTP_M_VRF);
 243                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 244         }
 245 }
 246
 247
 248 void
 249 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 250 {
 251         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 252                 /* We zero'd the count */
 253                 if (sctp_ifnp->vrf) {
 254                         sctp_free_vrf(sctp_ifnp->vrf);
 255                 }
 256                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 257                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 258         }
 259 }
 260
 261
 262 void
 263 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 264 {
 265         struct sctp_ifn *sctp_ifnp;
 266
 267         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 268         if (sctp_ifnp != NULL) {
 269                 sctp_ifnp->ifn_mtu = mtu;
 270         }
 271 }
 272
 273
 274 void
 275 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 276 {
 277         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 278                 /* We zero'd the count */
 279                 if (sctp_ifap->ifn_p) {
 280                         sctp_free_ifn(sctp_ifap->ifn_p);
 281                 }
 282                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 283                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 284         }
 285 }
 286
 287
 288 static void
 289 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 290 {
 291         struct sctp_ifn *found;
 292
 293         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 294         if (found == NULL) {
 295                 /* Not in the list.. sorry */
 296                 return;
 297         }
 298         if (hold_addr_lock == 0)
 299                 SCTP_IPI_ADDR_WLOCK();
 300         LIST_REMOVE(sctp_ifnp, next_bucket);
 301         LIST_REMOVE(sctp_ifnp, next_ifn);
 302         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 303             sctp_ifnp->registered_af);
 304         if (hold_addr_lock == 0)
 305                 SCTP_IPI_ADDR_WUNLOCK();
 306         /* Take away the reference, and possibly free it */
 307         sctp_free_ifn(sctp_ifnp);
 308 }
 309
 310
 311 void
 312 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 313     const char *if_name, uint32_t ifn_index)
 314 {
 315         struct sctp_vrf *vrf;
 316         struct sctp_ifa *sctp_ifap;
 317
 318         SCTP_IPI_ADDR_RLOCK();
 319         vrf = sctp_find_vrf(vrf_id);
 320         if (vrf == NULL) {
 321                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 322                 goto out;
 323
 324         }
 325         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 326         if (sctp_ifap == NULL) {
 327                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 328                 goto out;
 329         }
 330         if (sctp_ifap->ifn_p == NULL) {
 331                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
 332                 goto out;
 333         }
 334         if (if_name) {
 335                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 336                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 337                             sctp_ifap->ifn_p->ifn_name, if_name);
 338                         goto out;
 339                 }
 340         } else {
 341                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 342                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 343                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 344                         goto out;
 345                 }
 346         }
 347
 348         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 349         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 350 out:
 351         SCTP_IPI_ADDR_RUNLOCK();
 352 }
 353
 354
 355 void
 356 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 357     const char *if_name, uint32_t ifn_index)
 358 {
 359         struct sctp_vrf *vrf;
 360         struct sctp_ifa *sctp_ifap;
 361
 362         SCTP_IPI_ADDR_RLOCK();
 363         vrf = sctp_find_vrf(vrf_id);
 364         if (vrf == NULL) {
 365                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 366                 goto out;
 367
 368         }
 369         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 370         if (sctp_ifap == NULL) {
 371                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 372                 goto out;
 373         }
 374         if (sctp_ifap->ifn_p == NULL) {
 375                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
 376                 goto out;
 377         }
 378         if (if_name) {
 379                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 380                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 381                             sctp_ifap->ifn_p->ifn_name, if_name);
 382                         goto out;
 383                 }
 384         } else {
 385                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 386                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 387                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 388                         goto out;
 389                 }
 390         }
 391
 392         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 393         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 394 out:
 395         SCTP_IPI_ADDR_RUNLOCK();
 396 }
 397
 398
 399 /*-
 400  * Add an ifa to an ifn.
 401  * Register the interface as necessary.
 402  * NOTE: ADDR write lock MUST be held.
 403  */
 404 static void
 405 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 406 {
 407         int ifa_af;
 408
 409         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 410         sctp_ifap->ifn_p = sctp_ifnp;
 411         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 412         /* update address counts */
 413         sctp_ifnp->ifa_count++;
 414         ifa_af = sctp_ifap->address.sa.sa_family;
 415         switch (ifa_af) {
 416 #ifdef INET
 417         case AF_INET:
 418                 sctp_ifnp->num_v4++;
 419                 break;
 420 #endif
 421 #ifdef INET6
 422         case AF_INET6:
 423                 sctp_ifnp->num_v6++;
 424                 break;
 425 #endif
 426         default:
 427                 break;
 428         }
 429         if (sctp_ifnp->ifa_count == 1) {
 430                 /* register the new interface */
 431                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 432                 sctp_ifnp->registered_af = ifa_af;
 433         }
 434 }
 435
 436
 437 /*-
 438  * Remove an ifa from its ifn.
 439  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 440  * the interface based on the remaining address families left.
 441  * NOTE: ADDR write lock MUST be held.
 442  */
 443 static void
 444 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 445 {
 446         LIST_REMOVE(sctp_ifap, next_ifa);
 447         if (sctp_ifap->ifn_p) {
 448                 /* update address counts */
 449                 sctp_ifap->ifn_p->ifa_count--;
 450                 switch (sctp_ifap->address.sa.sa_family) {
 451 #ifdef INET
 452                 case AF_INET:
 453                         sctp_ifap->ifn_p->num_v4--;
 454                         break;
 455 #endif
 456 #ifdef INET6
 457                 case AF_INET6:
 458                         sctp_ifap->ifn_p->num_v6--;
 459                         break;
 460 #endif
 461                 default:
 462                         break;
 463                 }
 464
 465                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 466                         /* remove the ifn, possibly freeing it */
 467                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 468                 } else {
 469                         /* re-register address family type, if needed */
 470                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 471                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 472                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 473                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 474                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 475                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 476                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 477                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 478                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 479                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 480                         }
 481                         /* free the ifn refcount */
 482                         sctp_free_ifn(sctp_ifap->ifn_p);
 483                 }
 484                 sctp_ifap->ifn_p = NULL;
 485         }
 486 }
 487
 488
 489 struct sctp_ifa *
 490 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 491     uint32_t ifn_type, const char *if_name, void *ifa,
 492     struct sockaddr *addr, uint32_t ifa_flags,
 493     int dynamic_add)
 494 {
 495         struct sctp_vrf *vrf;
 496         struct sctp_ifn *sctp_ifnp = NULL;
 497         struct sctp_ifa *sctp_ifap = NULL;
 498         struct sctp_ifalist *hash_addr_head;
 499         struct sctp_ifnlist *hash_ifn_head;
 500         uint32_t hash_of_addr;
 501         int new_ifn_af = 0;
 502
 503 #ifdef SCTP_DEBUG
 504         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 505         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 506 #endif
 507         SCTP_IPI_ADDR_WLOCK();
 508         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 509         if (sctp_ifnp) {
 510                 vrf = sctp_ifnp->vrf;
 511         } else {
 512                 vrf = sctp_find_vrf(vrf_id);
 513                 if (vrf == NULL) {
 514                         vrf = sctp_allocate_vrf(vrf_id);
 515                         if (vrf == NULL) {
 516                                 SCTP_IPI_ADDR_WUNLOCK();
 517                                 return (NULL);
 518                         }
 519                 }
 520         }
 521         if (sctp_ifnp == NULL) {
 522                 /*
 523                  * build one and add it, can't hold lock until after malloc
 524                  * done though.
 525                  */
 526                 SCTP_IPI_ADDR_WUNLOCK();
 527                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 528                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 529                 if (sctp_ifnp == NULL) {
 530 #ifdef INVARIANTS
 531                         panic("No memory for IFN");
 532 #endif
 533                         return (NULL);
 534                 }
 535                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 536                 sctp_ifnp->ifn_index = ifn_index;
 537                 sctp_ifnp->ifn_p = ifn;
 538                 sctp_ifnp->ifn_type = ifn_type;
 539                 sctp_ifnp->refcount = 0;
 540                 sctp_ifnp->vrf = vrf;
 541                 atomic_add_int(&vrf->refcount, 1);
 542                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 543                 if (if_name != NULL) {
 544                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
 545                 } else {
 546                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
 547                 }
 548                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 549                 LIST_INIT(&sctp_ifnp->ifalist);
 550                 SCTP_IPI_ADDR_WLOCK();
 551                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 552                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 553                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 554                 new_ifn_af = 1;
 555         }
 556         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 557         if (sctp_ifap) {
 558                 /* Hmm, it already exists? */
 559                 if ((sctp_ifap->ifn_p) &&
 560                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 561                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 562                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 563                             (void *)sctp_ifap);
 564                         if (new_ifn_af) {
 565                                 /* Remove the created one that we don't want */
 566                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 567                         }
 568                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 569                                 /* easy to solve, just switch back to active */
 570                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 571                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 572                                 sctp_ifap->ifn_p = sctp_ifnp;
 573                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 574                         }
 575         exit_stage_left:
 576                         SCTP_IPI_ADDR_WUNLOCK();
 577                         return (sctp_ifap);
 578                 } else {
 579                         if (sctp_ifap->ifn_p) {
 580                                 /*
 581                                  * The last IFN gets the address, remove the
 582                                  * old one
 583                                  */
 584                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 585                                     (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 586                                     sctp_ifap->ifn_p->ifn_index, if_name,
 587                                     ifn_index);
 588                                 /* remove the address from the old ifn */
 589                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 590                                 /* move the address over to the new ifn */
 591                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 592                                 goto exit_stage_left;
 593                         } else {
 594                                 /* repair ifnp which was NULL ? */
 595                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 596                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 597                                     (void *)sctp_ifnp, (void *)sctp_ifap);
 598                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 599                         }
 600                         goto exit_stage_left;
 601                 }
 602         }
 603         SCTP_IPI_ADDR_WUNLOCK();
 604         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 605         if (sctp_ifap == NULL) {
 606 #ifdef INVARIANTS
 607                 panic("No memory for IFA");
 608 #endif
 609                 return (NULL);
 610         }
 611         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 612         sctp_ifap->ifn_p = sctp_ifnp;
 613         atomic_add_int(&sctp_ifnp->refcount, 1);
 614         sctp_ifap->vrf_id = vrf_id;
 615         sctp_ifap->ifa = ifa;
 616         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 617         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 618         sctp_ifap->flags = ifa_flags;
 619         /* Set scope */
 620         switch (sctp_ifap->address.sa.sa_family) {
 621 #ifdef INET
 622         case AF_INET:
 623                 {
 624                         struct sockaddr_in *sin;
 625
 626                         sin = &sctp_ifap->address.sin;
 627                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 628                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 629                                 sctp_ifap->src_is_loop = 1;
 630                         }
 631                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 632                                 sctp_ifap->src_is_priv = 1;
 633                         }
 634                         sctp_ifnp->num_v4++;
 635                         if (new_ifn_af)
 636                                 new_ifn_af = AF_INET;
 637                         break;
 638                 }
 639 #endif
 640 #ifdef INET6
 641         case AF_INET6:
 642                 {
 643                         /* ok to use deprecated addresses? */
 644                         struct sockaddr_in6 *sin6;
 645
 646                         sin6 = &sctp_ifap->address.sin6;
 647                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 648                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 649                                 sctp_ifap->src_is_loop = 1;
 650                         }
 651                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 652                                 sctp_ifap->src_is_priv = 1;
 653                         }
 654                         sctp_ifnp->num_v6++;
 655                         if (new_ifn_af)
 656                                 new_ifn_af = AF_INET6;
 657                         break;
 658                 }
 659 #endif
 660         default:
 661                 new_ifn_af = 0;
 662                 break;
 663         }
 664         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 665
 666         if ((sctp_ifap->src_is_priv == 0) &&
 667             (sctp_ifap->src_is_loop == 0)) {
 668                 sctp_ifap->src_is_glob = 1;
 669         }
 670         SCTP_IPI_ADDR_WLOCK();
 671         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 672         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 673         sctp_ifap->refcount = 1;
 674         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 675         sctp_ifnp->ifa_count++;
 676         vrf->total_ifa_count++;
 677         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 678         if (new_ifn_af) {
 679                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 680                 sctp_ifnp->registered_af = new_ifn_af;
 681         }
 682         SCTP_IPI_ADDR_WUNLOCK();
 683         if (dynamic_add) {
 684                 /*
 685                  * Bump up the refcount so that when the timer completes it
 686                  * will drop back down.
 687                  */
 688                 struct sctp_laddr *wi;
 689
 690                 atomic_add_int(&sctp_ifap->refcount, 1);
 691                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 692                 if (wi == NULL) {
 693                         /*
 694                          * Gak, what can we do? We have lost an address
 695                          * change can you say HOSED?
 696                          */
 697                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 698                         /* Opps, must decrement the count */
 699                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 700                             if_name);
 701                         return (NULL);
 702                 }
 703                 SCTP_INCR_LADDR_COUNT();
 704                 memset(wi, 0, sizeof(*wi));
 705                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 706                 wi->ifa = sctp_ifap;
 707                 wi->action = SCTP_ADD_IP_ADDRESS;
 708
 709                 SCTP_WQ_ADDR_LOCK();
 710                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 711                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 712                     (struct sctp_inpcb *)NULL,
 713                     (struct sctp_tcb *)NULL,
 714                     (struct sctp_nets *)NULL);
 715                 SCTP_WQ_ADDR_UNLOCK();
 716         } else {
 717                 /* it's ready for use */
 718                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 719         }
 720         return (sctp_ifap);
 721 }
 722
 723 void
 724 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 725     uint32_t ifn_index, const char *if_name)
 726 {
 727         struct sctp_vrf *vrf;
 728         struct sctp_ifa *sctp_ifap = NULL;
 729
 730         SCTP_IPI_ADDR_WLOCK();
 731         vrf = sctp_find_vrf(vrf_id);
 732         if (vrf == NULL) {
 733                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 734                 goto out_now;
 735         }
 736
 737 #ifdef SCTP_DEBUG
 738         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 739         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 740 #endif
 741         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 742         if (sctp_ifap) {
 743                 /* Validate the delete */
 744                 if (sctp_ifap->ifn_p) {
 745                         int valid = 0;
 746
 747                         /*-
 748                          * The name has priority over the ifn_index
 749                          * if its given. We do this especially for
 750                          * panda who might recycle indexes fast.
 751                          */
 752                         if (if_name) {
 753                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 754                                         /* They match its a correct delete */
 755                                         valid = 1;
 756                                 }
 757                         }
 758                         if (!valid) {
 759                                 /* last ditch check ifn_index */
 760                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 761                                         valid = 1;
 762                                 }
 763                         }
 764                         if (!valid) {
 765                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 766                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 767                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 768                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 769                                 SCTP_IPI_ADDR_WUNLOCK();
 770                                 return;
 771                         }
 772                 }
 773                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
 774                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 775                 /*
 776                  * We don't set the flag. This means that the structure will
 777                  * hang around in EP's that have bound specific to it until
 778                  * they close. This gives us TCP like behavior if someone
 779                  * removes an address (or for that matter adds it right
 780                  * back).
 781                  */
 782                 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
 783                 vrf->total_ifa_count--;
 784                 LIST_REMOVE(sctp_ifap, next_bucket);
 785                 sctp_remove_ifa_from_ifn(sctp_ifap);
 786         }
 787 #ifdef SCTP_DEBUG
 788         else {
 789                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 790                     ifn_index);
 791                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 792         }
 793 #endif
 794
 795 out_now:
 796         SCTP_IPI_ADDR_WUNLOCK();
 797         if (sctp_ifap) {
 798                 struct sctp_laddr *wi;
 799
 800                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 801                 if (wi == NULL) {
 802                         /*
 803                          * Gak, what can we do? We have lost an address
 804                          * change can you say HOSED?
 805                          */
 806                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 807
 808                         /* Oops, must decrement the count */
 809                         sctp_free_ifa(sctp_ifap);
 810                         return;
 811                 }
 812                 SCTP_INCR_LADDR_COUNT();
 813                 memset(wi, 0, sizeof(*wi));
 814                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 815                 wi->ifa = sctp_ifap;
 816                 wi->action = SCTP_DEL_IP_ADDRESS;
 817                 SCTP_WQ_ADDR_LOCK();
 818                 /*
 819                  * Should this really be a tailq? As it is we will process
 820                  * the newest first :-0
 821                  */
 822                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 823                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 824                     (struct sctp_inpcb *)NULL,
 825                     (struct sctp_tcb *)NULL,
 826                     (struct sctp_nets *)NULL);
 827                 SCTP_WQ_ADDR_UNLOCK();
 828         }
 829         return;
 830 }
 831
 832
 833 static int
 834 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
 835 {
 836         int loopback_scope;
 837 #if defined(INET)
 838         int ipv4_local_scope, ipv4_addr_legal;
 839 #endif
 840 #if defined(INET6)
 841         int local_scope, site_scope, ipv6_addr_legal;
 842 #endif
 843         struct sctp_vrf *vrf;
 844         struct sctp_ifn *sctp_ifn;
 845         struct sctp_ifa *sctp_ifa;
 846
 847         loopback_scope = stcb->asoc.scope.loopback_scope;
 848 #if defined(INET)
 849         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
 850         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
 851 #endif
 852 #if defined(INET6)
 853         local_scope = stcb->asoc.scope.local_scope;
 854         site_scope = stcb->asoc.scope.site_scope;
 855         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
 856 #endif
 857
 858         SCTP_IPI_ADDR_RLOCK();
 859         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
 860         if (vrf == NULL) {
 861                 /* no vrf, no addresses */
 862                 SCTP_IPI_ADDR_RUNLOCK();
 863                 return (0);
 864         }
 865
 866         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 867                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 868                         if ((loopback_scope == 0) &&
 869                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 870                                 continue;
 871                         }
 872                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 873                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
 874                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
 875                                         /*
 876                                          * We allow pending addresses, where
 877                                          * we have sent an asconf-add to be
 878                                          * considered valid.
 879                                          */
 880                                         continue;
 881                                 }
 882                                 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
 883                                         continue;
 884                                 }
 885                                 switch (sctp_ifa->address.sa.sa_family) {
 886 #ifdef INET
 887                                 case AF_INET:
 888                                         if (ipv4_addr_legal) {
 889                                                 struct sockaddr_in *sin,
 890                                                            *rsin;
 891
 892                                                 sin = &sctp_ifa->address.sin;
 893                                                 rsin = (struct sockaddr_in *)to;
 894                                                 if ((ipv4_local_scope == 0) &&
 895                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 896                                                         continue;
 897                                                 }
 898                                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
 899                                                     &sin->sin_addr) != 0) {
 900                                                         continue;
 901                                                 }
 902                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 903                                                         SCTP_IPI_ADDR_RUNLOCK();
 904                                                         return (1);
 905                                                 }
 906                                         }
 907                                         break;
 908 #endif
 909 #ifdef INET6
 910                                 case AF_INET6:
 911                                         if (ipv6_addr_legal) {
 912                                                 struct sockaddr_in6 *sin6,
 913                                                             *rsin6;
 914
 915                                                 sin6 = &sctp_ifa->address.sin6;
 916                                                 rsin6 = (struct sockaddr_in6 *)to;
 917                                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
 918                                                     &sin6->sin6_addr) != 0) {
 919                                                         continue;
 920                                                 }
 921                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 922                                                         if (local_scope == 0)
 923                                                                 continue;
 924                                                         if (sin6->sin6_scope_id == 0) {
 925                                                                 if (sa6_recoverscope(sin6) != 0)
 926                                                                         continue;
 927                                                         }
 928                                                 }
 929                                                 if ((site_scope == 0) &&
 930                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
 931                                                         continue;
 932                                                 }
 933                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 934                                                         SCTP_IPI_ADDR_RUNLOCK();
 935                                                         return (1);
 936                                                 }
 937                                         }
 938                                         break;
 939 #endif
 940                                 default:
 941                                         /* TSNH */
 942                                         break;
 943                                 }
 944                         }
 945                 }
 946         } else {
 947                 struct sctp_laddr *laddr;
 948
 949                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
 950                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 951                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 952                                 continue;
 953                         }
 954                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
 955                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
 956                                 /*
 957                                  * We allow pending addresses, where we have
 958                                  * sent an asconf-add to be considered
 959                                  * valid.
 960                                  */
 961                                 continue;
 962                         }
 963                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
 964                                 continue;
 965                         }
 966                         switch (to->sa_family) {
 967 #ifdef INET
 968                         case AF_INET:
 969                                 {
 970                                         struct sockaddr_in *sin, *rsin;
 971
 972                                         sin = &laddr->ifa->address.sin;
 973                                         rsin = (struct sockaddr_in *)to;
 974                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 975                                                 SCTP_IPI_ADDR_RUNLOCK();
 976                                                 return (1);
 977                                         }
 978                                         break;
 979                                 }
 980 #endif
 981 #ifdef INET6
 982                         case AF_INET6:
 983                                 {
 984                                         struct sockaddr_in6 *sin6, *rsin6;
 985
 986                                         sin6 = &laddr->ifa->address.sin6;
 987                                         rsin6 = (struct sockaddr_in6 *)to;
 988                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 989                                                 SCTP_IPI_ADDR_RUNLOCK();
 990                                                 return (1);
 991                                         }
 992                                         break;
 993                                 }
 994
 995 #endif
 996                         default:
 997                                 /* TSNH */
 998                                 break;
 999                         }
1000
1001                 }
1002         }
1003         SCTP_IPI_ADDR_RUNLOCK();
1004         return (0);
1005 }
1006
1007
1008 static struct sctp_tcb *
1009 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1010     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1011 {
1012         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1013         /*
1014          * If we support the TCP model, then we must now dig through to see
1015          * if we can find our endpoint in the list of tcp ep's.
1016          */
1017         uint16_t lport, rport;
1018         struct sctppcbhead *ephead;
1019         struct sctp_inpcb *inp;
1020         struct sctp_laddr *laddr;
1021         struct sctp_tcb *stcb;
1022         struct sctp_nets *net;
1023
1024         if ((to == NULL) || (from == NULL)) {
1025                 return (NULL);
1026         }
1027
1028         switch (to->sa_family) {
1029 #ifdef INET
1030         case AF_INET:
1031                 if (from->sa_family == AF_INET) {
1032                         lport = ((struct sockaddr_in *)to)->sin_port;
1033                         rport = ((struct sockaddr_in *)from)->sin_port;
1034                 } else {
1035                         return (NULL);
1036                 }
1037                 break;
1038 #endif
1039 #ifdef INET6
1040         case AF_INET6:
1041                 if (from->sa_family == AF_INET6) {
1042                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
1043                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
1044                 } else {
1045                         return (NULL);
1046                 }
1047                 break;
1048 #endif
1049         default:
1050                 return (NULL);
1051         }
1052         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1053         /*
1054          * Ok now for each of the guys in this bucket we must look and see:
1055          * - Does the remote port match. - Does there single association's
1056          * addresses match this address (to). If so we update p_ep to point
1057          * to this ep and return the tcb from it.
1058          */
1059         LIST_FOREACH(inp, ephead, sctp_hash) {
1060                 SCTP_INP_RLOCK(inp);
1061                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1062                         SCTP_INP_RUNLOCK(inp);
1063                         continue;
1064                 }
1065                 if (lport != inp->sctp_lport) {
1066                         SCTP_INP_RUNLOCK(inp);
1067                         continue;
1068                 }
1069                 switch (to->sa_family) {
1070 #ifdef INET
1071                 case AF_INET:
1072                         {
1073                                 struct sockaddr_in *sin;
1074
1075                                 sin = (struct sockaddr_in *)to;
1076                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1077                                     &sin->sin_addr) != 0) {
1078                                         SCTP_INP_RUNLOCK(inp);
1079                                         continue;
1080                                 }
1081                                 break;
1082                         }
1083 #endif
1084 #ifdef INET6
1085                 case AF_INET6:
1086                         {
1087                                 struct sockaddr_in6 *sin6;
1088
1089                                 sin6 = (struct sockaddr_in6 *)to;
1090                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1091                                     &sin6->sin6_addr) != 0) {
1092                                         SCTP_INP_RUNLOCK(inp);
1093                                         continue;
1094                                 }
1095                                 break;
1096                         }
1097 #endif
1098                 default:
1099                         SCTP_INP_RUNLOCK(inp);
1100                         continue;
1101                 }
1102                 if (inp->def_vrf_id != vrf_id) {
1103                         SCTP_INP_RUNLOCK(inp);
1104                         continue;
1105                 }
1106                 /* check to see if the ep has one of the addresses */
1107                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1108                         /* We are NOT bound all, so look further */
1109                         int match = 0;
1110
1111                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1112
1113                                 if (laddr->ifa == NULL) {
1114                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__);
1115                                         continue;
1116                                 }
1117                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1118                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1119                                         continue;
1120                                 }
1121                                 if (laddr->ifa->address.sa.sa_family ==
1122                                     to->sa_family) {
1123                                         /* see if it matches */
1124 #ifdef INET
1125                                         if (from->sa_family == AF_INET) {
1126                                                 struct sockaddr_in *intf_addr,
1127                                                            *sin;
1128
1129                                                 intf_addr = &laddr->ifa->address.sin;
1130                                                 sin = (struct sockaddr_in *)to;
1131                                                 if (sin->sin_addr.s_addr ==
1132                                                     intf_addr->sin_addr.s_addr) {
1133                                                         match = 1;
1134                                                         break;
1135                                                 }
1136                                         }
1137 #endif
1138 #ifdef INET6
1139                                         if (from->sa_family == AF_INET6) {
1140                                                 struct sockaddr_in6 *intf_addr6;
1141                                                 struct sockaddr_in6 *sin6;
1142
1143                                                 sin6 = (struct sockaddr_in6 *)
1144                                                     to;
1145                                                 intf_addr6 = &laddr->ifa->address.sin6;
1146
1147                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1148                                                     intf_addr6)) {
1149                                                         match = 1;
1150                                                         break;
1151                                                 }
1152                                         }
1153 #endif
1154                                 }
1155                         }
1156                         if (match == 0) {
1157                                 /* This endpoint does not have this address */
1158                                 SCTP_INP_RUNLOCK(inp);
1159                                 continue;
1160                         }
1161                 }
1162                 /*
1163                  * Ok if we hit here the ep has the address, does it hold
1164                  * the tcb?
1165                  */
1166                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1167                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1168                 if (stcb == NULL) {
1169                         SCTP_INP_RUNLOCK(inp);
1170                         continue;
1171                 }
1172                 SCTP_TCB_LOCK(stcb);
1173                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1174                         SCTP_TCB_UNLOCK(stcb);
1175                         SCTP_INP_RUNLOCK(inp);
1176                         continue;
1177                 }
1178                 if (stcb->rport != rport) {
1179                         /* remote port does not match. */
1180                         SCTP_TCB_UNLOCK(stcb);
1181                         SCTP_INP_RUNLOCK(inp);
1182                         continue;
1183                 }
1184                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1185                         SCTP_TCB_UNLOCK(stcb);
1186                         SCTP_INP_RUNLOCK(inp);
1187                         continue;
1188                 }
1189                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1190                         SCTP_TCB_UNLOCK(stcb);
1191                         SCTP_INP_RUNLOCK(inp);
1192                         continue;
1193                 }
1194                 /* Does this TCB have a matching address? */
1195                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1196
1197                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1198                                 /* not the same family, can't be a match */
1199                                 continue;
1200                         }
1201                         switch (from->sa_family) {
1202 #ifdef INET
1203                         case AF_INET:
1204                                 {
1205                                         struct sockaddr_in *sin, *rsin;
1206
1207                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
1208                                         rsin = (struct sockaddr_in *)from;
1209                                         if (sin->sin_addr.s_addr ==
1210                                             rsin->sin_addr.s_addr) {
1211                                                 /* found it */
1212                                                 if (netp != NULL) {
1213                                                         *netp = net;
1214                                                 }
1215                                                 /*
1216                                                  * Update the endpoint
1217                                                  * pointer
1218                                                  */
1219                                                 *inp_p = inp;
1220                                                 SCTP_INP_RUNLOCK(inp);
1221                                                 return (stcb);
1222                                         }
1223                                         break;
1224                                 }
1225 #endif
1226 #ifdef INET6
1227                         case AF_INET6:
1228                                 {
1229                                         struct sockaddr_in6 *sin6, *rsin6;
1230
1231                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1232                                         rsin6 = (struct sockaddr_in6 *)from;
1233                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1234                                             rsin6)) {
1235                                                 /* found it */
1236                                                 if (netp != NULL) {
1237                                                         *netp = net;
1238                                                 }
1239                                                 /*
1240                                                  * Update the endpoint
1241                                                  * pointer
1242                                                  */
1243                                                 *inp_p = inp;
1244                                                 SCTP_INP_RUNLOCK(inp);
1245                                                 return (stcb);
1246                                         }
1247                                         break;
1248                                 }
1249 #endif
1250                         default:
1251                                 /* TSNH */
1252                                 break;
1253                         }
1254                 }
1255                 SCTP_TCB_UNLOCK(stcb);
1256                 SCTP_INP_RUNLOCK(inp);
1257         }
1258         return (NULL);
1259 }
1260
1261
1262 /*
1263  * rules for use
1264  *
1265  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1266  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1267  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1268  * NULL.
1269  */
1270
1271 struct sctp_tcb *
1272 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1273     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1274 {
1275         struct sctpasochead *head;
1276         struct sctp_inpcb *inp;
1277         struct sctp_tcb *stcb = NULL;
1278         struct sctp_nets *net;
1279         uint16_t rport;
1280
1281         inp = *inp_p;
1282         switch (remote->sa_family) {
1283 #ifdef INET
1284         case AF_INET:
1285                 rport = (((struct sockaddr_in *)remote)->sin_port);
1286                 break;
1287 #endif
1288 #ifdef INET6
1289         case AF_INET6:
1290                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1291                 break;
1292 #endif
1293         default:
1294                 return (NULL);
1295         }
1296         if (locked_tcb) {
1297                 /*
1298                  * UN-lock so we can do proper locking here this occurs when
1299                  * called from load_addresses_from_init.
1300                  */
1301                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1302                 SCTP_TCB_UNLOCK(locked_tcb);
1303         }
1304         SCTP_INP_INFO_RLOCK();
1305         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1306             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1307                 /*-
1308                  * Now either this guy is our listener or it's the
1309                  * connector. If it is the one that issued the connect, then
1310                  * it's only chance is to be the first TCB in the list. If
1311                  * it is the acceptor, then do the special_lookup to hash
1312                  * and find the real inp.
1313                  */
1314                 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) {
1315                         /* to is peer addr, from is my addr */
1316                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1317                             netp, inp->def_vrf_id);
1318                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1319                                 /* we have a locked tcb, lower refcount */
1320                                 SCTP_INP_DECR_REF(inp);
1321                         }
1322                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1323                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1324                                 SCTP_TCB_LOCK(locked_tcb);
1325                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1326                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1327                         }
1328                         SCTP_INP_INFO_RUNLOCK();
1329                         return (stcb);
1330                 } else {
1331                         SCTP_INP_WLOCK(inp);
1332                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1333                                 goto null_return;
1334                         }
1335                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1336                         if (stcb == NULL) {
1337                                 goto null_return;
1338                         }
1339                         SCTP_TCB_LOCK(stcb);
1340
1341                         if (stcb->rport != rport) {
1342                                 /* remote port does not match. */
1343                                 SCTP_TCB_UNLOCK(stcb);
1344                                 goto null_return;
1345                         }
1346                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1347                                 SCTP_TCB_UNLOCK(stcb);
1348                                 goto null_return;
1349                         }
1350                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1351                                 SCTP_TCB_UNLOCK(stcb);
1352                                 goto null_return;
1353                         }
1354                         /* now look at the list of remote addresses */
1355                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1356 #ifdef INVARIANTS
1357                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1358                                         panic("Corrupt net list");
1359                                 }
1360 #endif
1361                                 if (net->ro._l_addr.sa.sa_family !=
1362                                     remote->sa_family) {
1363                                         /* not the same family */
1364                                         continue;
1365                                 }
1366                                 switch (remote->sa_family) {
1367 #ifdef INET
1368                                 case AF_INET:
1369                                         {
1370                                                 struct sockaddr_in *sin,
1371                                                            *rsin;
1372
1373                                                 sin = (struct sockaddr_in *)
1374                                                     &net->ro._l_addr;
1375                                                 rsin = (struct sockaddr_in *)remote;
1376                                                 if (sin->sin_addr.s_addr ==
1377                                                     rsin->sin_addr.s_addr) {
1378                                                         /* found it */
1379                                                         if (netp != NULL) {
1380                                                                 *netp = net;
1381                                                         }
1382                                                         if (locked_tcb == NULL) {
1383                                                                 SCTP_INP_DECR_REF(inp);
1384                                                         } else if (locked_tcb != stcb) {
1385                                                                 SCTP_TCB_LOCK(locked_tcb);
1386                                                         }
1387                                                         if (locked_tcb) {
1388                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1389                                                         }
1390
1391                                                         SCTP_INP_WUNLOCK(inp);
1392                                                         SCTP_INP_INFO_RUNLOCK();
1393                                                         return (stcb);
1394                                                 }
1395                                                 break;
1396                                         }
1397 #endif
1398 #ifdef INET6
1399                                 case AF_INET6:
1400                                         {
1401                                                 struct sockaddr_in6 *sin6,
1402                                                             *rsin6;
1403
1404                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1405                                                 rsin6 = (struct sockaddr_in6 *)remote;
1406                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1407                                                     rsin6)) {
1408                                                         /* found it */
1409                                                         if (netp != NULL) {
1410                                                                 *netp = net;
1411                                                         }
1412                                                         if (locked_tcb == NULL) {
1413                                                                 SCTP_INP_DECR_REF(inp);
1414                                                         } else if (locked_tcb != stcb) {
1415                                                                 SCTP_TCB_LOCK(locked_tcb);
1416                                                         }
1417                                                         if (locked_tcb) {
1418                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1419                                                         }
1420                                                         SCTP_INP_WUNLOCK(inp);
1421                                                         SCTP_INP_INFO_RUNLOCK();
1422                                                         return (stcb);
1423                                                 }
1424                                                 break;
1425                                         }
1426 #endif
1427                                 default:
1428                                         /* TSNH */
1429                                         break;
1430                                 }
1431                         }
1432                         SCTP_TCB_UNLOCK(stcb);
1433                 }
1434         } else {
1435                 SCTP_INP_WLOCK(inp);
1436                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1437                         goto null_return;
1438                 }
1439                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1440                     inp->sctp_hashmark)];
1441                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1442                         if (stcb->rport != rport) {
1443                                 /* remote port does not match */
1444                                 continue;
1445                         }
1446                         SCTP_TCB_LOCK(stcb);
1447                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1448                                 SCTP_TCB_UNLOCK(stcb);
1449                                 continue;
1450                         }
1451                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1452                                 SCTP_TCB_UNLOCK(stcb);
1453                                 continue;
1454                         }
1455                         /* now look at the list of remote addresses */
1456                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1457 #ifdef INVARIANTS
1458                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1459                                         panic("Corrupt net list");
1460                                 }
1461 #endif
1462                                 if (net->ro._l_addr.sa.sa_family !=
1463                                     remote->sa_family) {
1464                                         /* not the same family */
1465                                         continue;
1466                                 }
1467                                 switch (remote->sa_family) {
1468 #ifdef INET
1469                                 case AF_INET:
1470                                         {
1471                                                 struct sockaddr_in *sin,
1472                                                            *rsin;
1473
1474                                                 sin = (struct sockaddr_in *)
1475                                                     &net->ro._l_addr;
1476                                                 rsin = (struct sockaddr_in *)remote;
1477                                                 if (sin->sin_addr.s_addr ==
1478                                                     rsin->sin_addr.s_addr) {
1479                                                         /* found it */
1480                                                         if (netp != NULL) {
1481                                                                 *netp = net;
1482                                                         }
1483                                                         if (locked_tcb == NULL) {
1484                                                                 SCTP_INP_DECR_REF(inp);
1485                                                         } else if (locked_tcb != stcb) {
1486                                                                 SCTP_TCB_LOCK(locked_tcb);
1487                                                         }
1488                                                         if (locked_tcb) {
1489                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1490                                                         }
1491                                                         SCTP_INP_WUNLOCK(inp);
1492                                                         SCTP_INP_INFO_RUNLOCK();
1493                                                         return (stcb);
1494                                                 }
1495                                                 break;
1496                                         }
1497 #endif
1498 #ifdef INET6
1499                                 case AF_INET6:
1500                                         {
1501                                                 struct sockaddr_in6 *sin6,
1502                                                             *rsin6;
1503
1504                                                 sin6 = (struct sockaddr_in6 *)
1505                                                     &net->ro._l_addr;
1506                                                 rsin6 = (struct sockaddr_in6 *)remote;
1507                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1508                                                     rsin6)) {
1509                                                         /* found it */
1510                                                         if (netp != NULL) {
1511                                                                 *netp = net;
1512                                                         }
1513                                                         if (locked_tcb == NULL) {
1514                                                                 SCTP_INP_DECR_REF(inp);
1515                                                         } else if (locked_tcb != stcb) {
1516                                                                 SCTP_TCB_LOCK(locked_tcb);
1517                                                         }
1518                                                         if (locked_tcb) {
1519                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1520                                                         }
1521                                                         SCTP_INP_WUNLOCK(inp);
1522                                                         SCTP_INP_INFO_RUNLOCK();
1523                                                         return (stcb);
1524                                                 }
1525                                                 break;
1526                                         }
1527 #endif
1528                                 default:
1529                                         /* TSNH */
1530                                         break;
1531                                 }
1532                         }
1533                         SCTP_TCB_UNLOCK(stcb);
1534                 }
1535         }
1536 null_return:
1537         /* clean up for returning null */
1538         if (locked_tcb) {
1539                 SCTP_TCB_LOCK(locked_tcb);
1540                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1541         }
1542         SCTP_INP_WUNLOCK(inp);
1543         SCTP_INP_INFO_RUNLOCK();
1544         /* not found */
1545         return (NULL);
1546 }
1547
1548
1549 /*
1550  * Find an association for a specific endpoint using the association id given
1551  * out in the COMM_UP notification
1552  */
1553 struct sctp_tcb *
1554 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1555 {
1556         /*
1557          * Use my the assoc_id to find a endpoint
1558          */
1559         struct sctpasochead *head;
1560         struct sctp_tcb *stcb;
1561         uint32_t id;
1562
1563         if (inp == NULL) {
1564                 SCTP_PRINTF("TSNH ep_associd\n");
1565                 return (NULL);
1566         }
1567         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1568                 SCTP_PRINTF("TSNH ep_associd0\n");
1569                 return (NULL);
1570         }
1571         id = (uint32_t)asoc_id;
1572         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1573         if (head == NULL) {
1574                 /* invalid id TSNH */
1575                 SCTP_PRINTF("TSNH ep_associd1\n");
1576                 return (NULL);
1577         }
1578         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1579                 if (stcb->asoc.assoc_id == id) {
1580                         if (inp != stcb->sctp_ep) {
1581                                 /*
1582                                  * some other guy has the same id active (id
1583                                  * collision ??).
1584                                  */
1585                                 SCTP_PRINTF("TSNH ep_associd2\n");
1586                                 continue;
1587                         }
1588                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1589                                 continue;
1590                         }
1591                         if (want_lock) {
1592                                 SCTP_TCB_LOCK(stcb);
1593                         }
1594                         return (stcb);
1595                 }
1596         }
1597         return (NULL);
1598 }
1599
1600
1601 struct sctp_tcb *
1602 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1603 {
1604         struct sctp_tcb *stcb;
1605
1606         SCTP_INP_RLOCK(inp);
1607         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1608         SCTP_INP_RUNLOCK(inp);
1609         return (stcb);
1610 }
1611
1612
1613 /*
1614  * Endpoint probe expects that the INP_INFO is locked.
1615  */
1616 static struct sctp_inpcb *
1617 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1618     uint16_t lport, uint32_t vrf_id)
1619 {
1620         struct sctp_inpcb *inp;
1621         struct sctp_laddr *laddr;
1622 #ifdef INET
1623         struct sockaddr_in *sin;
1624 #endif
1625 #ifdef INET6
1626         struct sockaddr_in6 *sin6;
1627         struct sockaddr_in6 *intf_addr6;
1628 #endif
1629         int fnd;
1630
1631 #ifdef INET
1632         sin = NULL;
1633 #endif
1634 #ifdef INET6
1635         sin6 = NULL;
1636 #endif
1637         switch (nam->sa_family) {
1638 #ifdef INET
1639         case AF_INET:
1640                 sin = (struct sockaddr_in *)nam;
1641                 break;
1642 #endif
1643 #ifdef INET6
1644         case AF_INET6:
1645                 sin6 = (struct sockaddr_in6 *)nam;
1646                 break;
1647 #endif
1648         default:
1649                 /* unsupported family */
1650                 return (NULL);
1651         }
1652
1653         if (head == NULL)
1654                 return (NULL);
1655
1656         LIST_FOREACH(inp, head, sctp_hash) {
1657                 SCTP_INP_RLOCK(inp);
1658                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1659                         SCTP_INP_RUNLOCK(inp);
1660                         continue;
1661                 }
1662                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1663                     (inp->sctp_lport == lport)) {
1664                         /* got it */
1665                         switch (nam->sa_family) {
1666 #ifdef INET
1667                         case AF_INET:
1668                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1669                                     SCTP_IPV6_V6ONLY(inp)) {
1670                                         /*
1671                                          * IPv4 on a IPv6 socket with ONLY
1672                                          * IPv6 set
1673                                          */
1674                                         SCTP_INP_RUNLOCK(inp);
1675                                         continue;
1676                                 }
1677                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1678                                     &sin->sin_addr) != 0) {
1679                                         SCTP_INP_RUNLOCK(inp);
1680                                         continue;
1681                                 }
1682                                 break;
1683 #endif
1684 #ifdef INET6
1685                         case AF_INET6:
1686                                 /*
1687                                  * A V6 address and the endpoint is NOT
1688                                  * bound V6
1689                                  */
1690                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1691                                         SCTP_INP_RUNLOCK(inp);
1692                                         continue;
1693                                 }
1694                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1695                                     &sin6->sin6_addr) != 0) {
1696                                         SCTP_INP_RUNLOCK(inp);
1697                                         continue;
1698                                 }
1699                                 break;
1700 #endif
1701                         default:
1702                                 break;
1703                         }
1704                         /* does a VRF id match? */
1705                         fnd = 0;
1706                         if (inp->def_vrf_id == vrf_id)
1707                                 fnd = 1;
1708
1709                         SCTP_INP_RUNLOCK(inp);
1710                         if (!fnd)
1711                                 continue;
1712                         return (inp);
1713                 }
1714                 SCTP_INP_RUNLOCK(inp);
1715         }
1716         switch (nam->sa_family) {
1717 #ifdef INET
1718         case AF_INET:
1719                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1720                         /* Can't hunt for one that has no address specified */
1721                         return (NULL);
1722                 }
1723                 break;
1724 #endif
1725 #ifdef INET6
1726         case AF_INET6:
1727                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1728                         /* Can't hunt for one that has no address specified */
1729                         return (NULL);
1730                 }
1731                 break;
1732 #endif
1733         default:
1734                 break;
1735         }
1736         /*
1737          * ok, not bound to all so see if we can find a EP bound to this
1738          * address.
1739          */
1740         LIST_FOREACH(inp, head, sctp_hash) {
1741                 SCTP_INP_RLOCK(inp);
1742                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1743                         SCTP_INP_RUNLOCK(inp);
1744                         continue;
1745                 }
1746                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1747                         SCTP_INP_RUNLOCK(inp);
1748                         continue;
1749                 }
1750                 /*
1751                  * Ok this could be a likely candidate, look at all of its
1752                  * addresses
1753                  */
1754                 if (inp->sctp_lport != lport) {
1755                         SCTP_INP_RUNLOCK(inp);
1756                         continue;
1757                 }
1758                 /* does a VRF id match? */
1759                 fnd = 0;
1760                 if (inp->def_vrf_id == vrf_id)
1761                         fnd = 1;
1762
1763                 if (!fnd) {
1764                         SCTP_INP_RUNLOCK(inp);
1765                         continue;
1766                 }
1767                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1768                         if (laddr->ifa == NULL) {
1769                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1770                                     __func__);
1771                                 continue;
1772                         }
1773                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1774                             (void *)laddr->ifa);
1775                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1776                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1777                                 continue;
1778                         }
1779                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1780                                 /* possible, see if it matches */
1781                                 switch (nam->sa_family) {
1782 #ifdef INET
1783                                 case AF_INET:
1784                                         if (sin->sin_addr.s_addr ==
1785                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1786                                                 SCTP_INP_RUNLOCK(inp);
1787                                                 return (inp);
1788                                         }
1789                                         break;
1790 #endif
1791 #ifdef INET6
1792                                 case AF_INET6:
1793                                         intf_addr6 = &laddr->ifa->address.sin6;
1794                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1795                                             intf_addr6)) {
1796                                                 SCTP_INP_RUNLOCK(inp);
1797                                                 return (inp);
1798                                         }
1799                                         break;
1800 #endif
1801                                 }
1802                         }
1803                 }
1804                 SCTP_INP_RUNLOCK(inp);
1805         }
1806         return (NULL);
1807 }
1808
1809
1810 static struct sctp_inpcb *
1811 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1812 {
1813         struct sctppcbhead *head;
1814         struct sctp_inpcb *t_inp;
1815         int fnd;
1816
1817         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1818             SCTP_BASE_INFO(hashmark))];
1819         LIST_FOREACH(t_inp, head, sctp_hash) {
1820                 if (t_inp->sctp_lport != lport) {
1821                         continue;
1822                 }
1823                 /* is it in the VRF in question */
1824                 fnd = 0;
1825                 if (t_inp->def_vrf_id == vrf_id)
1826                         fnd = 1;
1827                 if (!fnd)
1828                         continue;
1829
1830                 /* This one is in use. */
1831                 /* check the v6/v4 binding issue */
1832                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1833                     SCTP_IPV6_V6ONLY(t_inp)) {
1834                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1835                                 /* collision in V6 space */
1836                                 return (t_inp);
1837                         } else {
1838                                 /* inp is BOUND_V4 no conflict */
1839                                 continue;
1840                         }
1841                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1842                         /* t_inp is bound v4 and v6, conflict always */
1843                         return (t_inp);
1844                 } else {
1845                         /* t_inp is bound only V4 */
1846                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1847                             SCTP_IPV6_V6ONLY(inp)) {
1848                                 /* no conflict */
1849                                 continue;
1850                         }
1851                         /* else fall through to conflict */
1852                 }
1853                 return (t_inp);
1854         }
1855         return (NULL);
1856 }
1857
1858
1859 int
1860 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1861 {
1862         /* For 1-2-1 with port reuse */
1863         struct sctppcbhead *head;
1864         struct sctp_inpcb *tinp, *ninp;
1865
1866         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1867                 /* only works with port reuse on */
1868                 return (-1);
1869         }
1870         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1871                 return (0);
1872         }
1873         SCTP_INP_RUNLOCK(inp);
1874         SCTP_INP_INFO_WLOCK();
1875         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1876             SCTP_BASE_INFO(hashmark))];
1877         /* Kick out all non-listeners to the TCP hash */
1878         LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1879                 if (tinp->sctp_lport != inp->sctp_lport) {
1880                         continue;
1881                 }
1882                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1883                         continue;
1884                 }
1885                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1886                         continue;
1887                 }
1888                 if (SCTP_IS_LISTENING(tinp)) {
1889                         continue;
1890                 }
1891                 SCTP_INP_WLOCK(tinp);
1892                 LIST_REMOVE(tinp, sctp_hash);
1893                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1894                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1895                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1896                 SCTP_INP_WUNLOCK(tinp);
1897         }
1898         SCTP_INP_WLOCK(inp);
1899         /* Pull from where he was */
1900         LIST_REMOVE(inp, sctp_hash);
1901         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1902         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1903         LIST_INSERT_HEAD(head, inp, sctp_hash);
1904         SCTP_INP_WUNLOCK(inp);
1905         SCTP_INP_RLOCK(inp);
1906         SCTP_INP_INFO_WUNLOCK();
1907         return (0);
1908 }
1909
1910
1911 struct sctp_inpcb *
1912 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1913     uint32_t vrf_id)
1914 {
1915         /*
1916          * First we check the hash table to see if someone has this port
1917          * bound with just the port.
1918          */
1919         struct sctp_inpcb *inp;
1920         struct sctppcbhead *head;
1921         int lport;
1922         unsigned int i;
1923 #ifdef INET
1924         struct sockaddr_in *sin;
1925 #endif
1926 #ifdef INET6
1927         struct sockaddr_in6 *sin6;
1928 #endif
1929
1930         switch (nam->sa_family) {
1931 #ifdef INET
1932         case AF_INET:
1933                 sin = (struct sockaddr_in *)nam;
1934                 lport = sin->sin_port;
1935                 break;
1936 #endif
1937 #ifdef INET6
1938         case AF_INET6:
1939                 sin6 = (struct sockaddr_in6 *)nam;
1940                 lport = sin6->sin6_port;
1941                 break;
1942 #endif
1943         default:
1944                 return (NULL);
1945         }
1946         /*
1947          * I could cheat here and just cast to one of the types but we will
1948          * do it right. It also provides the check against an Unsupported
1949          * type too.
1950          */
1951         /* Find the head of the ALLADDR chain */
1952         if (have_lock == 0) {
1953                 SCTP_INP_INFO_RLOCK();
1954         }
1955         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1956             SCTP_BASE_INFO(hashmark))];
1957         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1958
1959         /*
1960          * If the TCP model exists it could be that the main listening
1961          * endpoint is gone but there still exists a connected socket for
1962          * this guy. If so we can return the first one that we find. This
1963          * may NOT be the correct one so the caller should be wary on the
1964          * returned INP. Currently the only caller that sets find_tcp_pool
1965          * is in bindx where we are verifying that a user CAN bind the
1966          * address. He either has bound it already, or someone else has, or
1967          * its open to bind, so this is good enough.
1968          */
1969         if (inp == NULL && find_tcp_pool) {
1970                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1971                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1972                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1973                         if (inp) {
1974                                 break;
1975                         }
1976                 }
1977         }
1978         if (inp) {
1979                 SCTP_INP_INCR_REF(inp);
1980         }
1981         if (have_lock == 0) {
1982                 SCTP_INP_INFO_RUNLOCK();
1983         }
1984         return (inp);
1985 }
1986
1987
1988 /*
1989  * Find an association for an endpoint with the pointer to whom you want to
1990  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1991  * need to change the *to to some other struct like a mbuf...
1992  */
1993 struct sctp_tcb *
1994 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
1995     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1996     uint32_t vrf_id)
1997 {
1998         struct sctp_inpcb *inp = NULL;
1999         struct sctp_tcb *stcb;
2000
2001         SCTP_INP_INFO_RLOCK();
2002         if (find_tcp_pool) {
2003                 if (inp_p != NULL) {
2004                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2005                             vrf_id);
2006                 } else {
2007                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2008                             vrf_id);
2009                 }
2010                 if (stcb != NULL) {
2011                         SCTP_INP_INFO_RUNLOCK();
2012                         return (stcb);
2013                 }
2014         }
2015         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2016         if (inp_p != NULL) {
2017                 *inp_p = inp;
2018         }
2019         SCTP_INP_INFO_RUNLOCK();
2020         if (inp == NULL) {
2021                 return (NULL);
2022         }
2023         /*
2024          * ok, we have an endpoint, now lets find the assoc for it (if any)
2025          * we now place the source address or from in the to of the find
2026          * endpoint call. Since in reality this chain is used from the
2027          * inbound packet side.
2028          */
2029         if (inp_p != NULL) {
2030                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2031                     NULL);
2032         } else {
2033                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2034                     NULL);
2035         }
2036         return (stcb);
2037 }
2038
2039
2040 /*
2041  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2042  * find all addresses that the sender has specified in any address list. Each
2043  * address will be used to lookup the TCB and see if one exits.
2044  */
2045 static struct sctp_tcb *
2046 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2047     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2048     struct sockaddr *dst)
2049 {
2050         struct sctp_paramhdr *phdr, param_buf;
2051 #if defined(INET) || defined(INET6)
2052         struct sctp_tcb *stcb;
2053         uint16_t ptype;
2054 #endif
2055         uint16_t plen;
2056 #ifdef INET
2057         struct sockaddr_in sin4;
2058 #endif
2059 #ifdef INET6
2060         struct sockaddr_in6 sin6;
2061 #endif
2062
2063 #ifdef INET
2064         memset(&sin4, 0, sizeof(sin4));
2065         sin4.sin_len = sizeof(sin4);
2066         sin4.sin_family = AF_INET;
2067         sin4.sin_port = sh->src_port;
2068 #endif
2069 #ifdef INET6
2070         memset(&sin6, 0, sizeof(sin6));
2071         sin6.sin6_len = sizeof(sin6);
2072         sin6.sin6_family = AF_INET6;
2073         sin6.sin6_port = sh->src_port;
2074 #endif
2075
2076         offset += sizeof(struct sctp_init_chunk);
2077
2078         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
2079         while (phdr != NULL) {
2080                 /* now we must see if we want the parameter */
2081 #if defined(INET) || defined(INET6)
2082                 ptype = ntohs(phdr->param_type);
2083 #endif
2084                 plen = ntohs(phdr->param_length);
2085                 if (plen == 0) {
2086                         break;
2087                 }
2088 #ifdef INET
2089                 if (ptype == SCTP_IPV4_ADDRESS &&
2090                     plen == sizeof(struct sctp_ipv4addr_param)) {
2091                         /* Get the rest of the address */
2092                         struct sctp_ipv4addr_param ip4_param, *p4;
2093
2094                         phdr = sctp_get_next_param(m, offset,
2095                             (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param));
2096                         if (phdr == NULL) {
2097                                 return (NULL);
2098                         }
2099                         p4 = (struct sctp_ipv4addr_param *)phdr;
2100                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2101                         /* look it up */
2102                         stcb = sctp_findassociation_ep_addr(inp_p,
2103                             (struct sockaddr *)&sin4, netp, dst, NULL);
2104                         if (stcb != NULL) {
2105                                 return (stcb);
2106                         }
2107                 }
2108 #endif
2109 #ifdef INET6
2110                 if (ptype == SCTP_IPV6_ADDRESS &&
2111                     plen == sizeof(struct sctp_ipv6addr_param)) {
2112                         /* Get the rest of the address */
2113                         struct sctp_ipv6addr_param ip6_param, *p6;
2114
2115                         phdr = sctp_get_next_param(m, offset,
2116                             (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param));
2117                         if (phdr == NULL) {
2118                                 return (NULL);
2119                         }
2120                         p6 = (struct sctp_ipv6addr_param *)phdr;
2121                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2122                         /* look it up */
2123                         stcb = sctp_findassociation_ep_addr(inp_p,
2124                             (struct sockaddr *)&sin6, netp, dst, NULL);
2125                         if (stcb != NULL) {
2126                                 return (stcb);
2127                         }
2128                 }
2129 #endif
2130                 offset += SCTP_SIZE32(plen);
2131                 phdr = sctp_get_next_param(m, offset, &param_buf,
2132                     sizeof(param_buf));
2133         }
2134         return (NULL);
2135 }
2136
2137 static struct sctp_tcb *
2138 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2139     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2140     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2141 {
2142         /*
2143          * Use my vtag to hash. If we find it we then verify the source addr
2144          * is in the assoc. If all goes well we save a bit on rec of a
2145          * packet.
2146          */
2147         struct sctpasochead *head;
2148         struct sctp_nets *net;
2149         struct sctp_tcb *stcb;
2150
2151         SCTP_INP_INFO_RLOCK();
2152         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2153             SCTP_BASE_INFO(hashasocmark))];
2154         LIST_FOREACH(stcb, head, sctp_asocs) {
2155                 SCTP_INP_RLOCK(stcb->sctp_ep);
2156                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2157                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2158                         continue;
2159                 }
2160                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2161                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2162                         continue;
2163                 }
2164                 SCTP_TCB_LOCK(stcb);
2165                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2166                 if (stcb->asoc.my_vtag == vtag) {
2167                         /* candidate */
2168                         if (stcb->rport != rport) {
2169                                 SCTP_TCB_UNLOCK(stcb);
2170                                 continue;
2171                         }
2172                         if (stcb->sctp_ep->sctp_lport != lport) {
2173                                 SCTP_TCB_UNLOCK(stcb);
2174                                 continue;
2175                         }
2176                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2177                                 SCTP_TCB_UNLOCK(stcb);
2178                                 continue;
2179                         }
2180                         /* RRS:Need toaddr check here */
2181                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2182                                 /* Endpoint does not own this address */
2183                                 SCTP_TCB_UNLOCK(stcb);
2184                                 continue;
2185                         }
2186                         if (remote_tag) {
2187                                 /*
2188                                  * If we have both vtags that's all we match
2189                                  * on
2190                                  */
2191                                 if (stcb->asoc.peer_vtag == remote_tag) {
2192                                         /*
2193                                          * If both tags match we consider it
2194                                          * conclusive and check NO
2195                                          * source/destination addresses
2196                                          */
2197                                         goto conclusive;
2198                                 }
2199                         }
2200                         if (skip_src_check) {
2201                 conclusive:
2202                                 if (from) {
2203                                         *netp = sctp_findnet(stcb, from);
2204                                 } else {
2205                                         *netp = NULL;   /* unknown */
2206                                 }
2207                                 if (inp_p)
2208                                         *inp_p = stcb->sctp_ep;
2209                                 SCTP_INP_INFO_RUNLOCK();
2210                                 return (stcb);
2211                         }
2212                         net = sctp_findnet(stcb, from);
2213                         if (net) {
2214                                 /* yep its him. */
2215                                 *netp = net;
2216                                 SCTP_STAT_INCR(sctps_vtagexpress);
2217                                 *inp_p = stcb->sctp_ep;
2218                                 SCTP_INP_INFO_RUNLOCK();
2219                                 return (stcb);
2220                         } else {
2221                                 /*
2222                                  * not him, this should only happen in rare
2223                                  * cases so I peg it.
2224                                  */
2225                                 SCTP_STAT_INCR(sctps_vtagbogus);
2226                         }
2227                 }
2228                 SCTP_TCB_UNLOCK(stcb);
2229         }
2230         SCTP_INP_INFO_RUNLOCK();
2231         return (NULL);
2232 }
2233
2234
2235 /*
2236  * Find an association with the pointer to the inbound IP packet. This can be
2237  * a IPv4 or IPv6 packet.
2238  */
2239 struct sctp_tcb *
2240 sctp_findassociation_addr(struct mbuf *m, int offset,
2241     struct sockaddr *src, struct sockaddr *dst,
2242     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2243     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2244 {
2245         struct sctp_tcb *stcb;
2246         struct sctp_inpcb *inp;
2247
2248         if (sh->v_tag) {
2249                 /* we only go down this path if vtag is non-zero */
2250                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2251                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2252                 if (stcb) {
2253                         return (stcb);
2254                 }
2255         }
2256
2257         if (inp_p) {
2258                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2259                     1, vrf_id);
2260                 inp = *inp_p;
2261         } else {
2262                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2263                     1, vrf_id);
2264         }
2265         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2266         if (stcb == NULL && inp) {
2267                 /* Found a EP but not this address */
2268                 if ((ch->chunk_type == SCTP_INITIATION) ||
2269                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2270                         /*-
2271                          * special hook, we do NOT return linp or an
2272                          * association that is linked to an existing
2273                          * association that is under the TCP pool (i.e. no
2274                          * listener exists). The endpoint finding routine
2275                          * will always find a listener before examining the
2276                          * TCP pool.
2277                          */
2278                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2279                                 if (inp_p) {
2280                                         *inp_p = NULL;
2281                                 }
2282                                 return (NULL);
2283                         }
2284                         stcb = sctp_findassociation_special_addr(m,
2285                             offset, sh, &inp, netp, dst);
2286                         if (inp_p != NULL) {
2287                                 *inp_p = inp;
2288                         }
2289                 }
2290         }
2291         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2292         return (stcb);
2293 }
2294
2295 /*
2296  * lookup an association by an ASCONF lookup address.
2297  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2298  */
2299 struct sctp_tcb *
2300 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2301     struct sockaddr *dst, struct sctphdr *sh,
2302     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2303 {
2304         struct sctp_tcb *stcb;
2305         union sctp_sockstore remote_store;
2306         struct sctp_paramhdr param_buf, *phdr;
2307         int ptype;
2308         int zero_address = 0;
2309 #ifdef INET
2310         struct sockaddr_in *sin;
2311 #endif
2312 #ifdef INET6
2313         struct sockaddr_in6 *sin6;
2314 #endif
2315
2316         memset(&remote_store, 0, sizeof(remote_store));
2317         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2318             &param_buf, sizeof(struct sctp_paramhdr));
2319         if (phdr == NULL) {
2320                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2321                     __func__);
2322                 return NULL;
2323         }
2324         ptype = (int)((uint32_t)ntohs(phdr->param_type));
2325         /* get the correlation address */
2326         switch (ptype) {
2327 #ifdef INET6
2328         case SCTP_IPV6_ADDRESS:
2329                 {
2330                         /* ipv6 address param */
2331                         struct sctp_ipv6addr_param *p6, p6_buf;
2332
2333                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2334                                 return NULL;
2335                         }
2336                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2337                             offset + sizeof(struct sctp_asconf_chunk),
2338                             &p6_buf.ph, sizeof(p6_buf));
2339                         if (p6 == NULL) {
2340                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2341                                     __func__);
2342                                 return (NULL);
2343                         }
2344                         sin6 = &remote_store.sin6;
2345                         sin6->sin6_family = AF_INET6;
2346                         sin6->sin6_len = sizeof(*sin6);
2347                         sin6->sin6_port = sh->src_port;
2348                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2349                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2350                                 zero_address = 1;
2351                         break;
2352                 }
2353 #endif
2354 #ifdef INET
2355         case SCTP_IPV4_ADDRESS:
2356                 {
2357                         /* ipv4 address param */
2358                         struct sctp_ipv4addr_param *p4, p4_buf;
2359
2360                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2361                                 return NULL;
2362                         }
2363                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2364                             offset + sizeof(struct sctp_asconf_chunk),
2365                             &p4_buf.ph, sizeof(p4_buf));
2366                         if (p4 == NULL) {
2367                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2368                                     __func__);
2369                                 return (NULL);
2370                         }
2371                         sin = &remote_store.sin;
2372                         sin->sin_family = AF_INET;
2373                         sin->sin_len = sizeof(*sin);
2374                         sin->sin_port = sh->src_port;
2375                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2376                         if (sin->sin_addr.s_addr == INADDR_ANY)
2377                                 zero_address = 1;
2378                         break;
2379                 }
2380 #endif
2381         default:
2382                 /* invalid address param type */
2383                 return NULL;
2384         }
2385
2386         if (zero_address) {
2387                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2388                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2389                 if (stcb != NULL) {
2390                         SCTP_INP_DECR_REF(*inp_p);
2391                 }
2392         } else {
2393                 stcb = sctp_findassociation_ep_addr(inp_p,
2394                     &remote_store.sa, netp,
2395                     dst, NULL);
2396         }
2397         return (stcb);
2398 }
2399
2400
2401 /*
2402  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2403  * addresses. This way if we don't get a bind we by default pick a ephemeral
2404  * port with all addresses bound.
2405  */
2406 int
2407 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2408 {
2409         /*
2410          * we get called when a new endpoint starts up. We need to allocate
2411          * the sctp_inpcb structure from the zone and init it. Mark it as
2412          * unbound and find a port that we can use as an ephemeral with
2413          * INADDR_ANY. If the user binds later no problem we can then add in
2414          * the specific addresses. And setup the default parameters for the
2415          * EP.
2416          */
2417         int i, error;
2418         struct sctp_inpcb *inp;
2419         struct sctp_pcb *m;
2420         struct timeval time;
2421         sctp_sharedkey_t *null_key;
2422
2423         error = 0;
2424
2425         SCTP_INP_INFO_WLOCK();
2426         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2427         if (inp == NULL) {
2428                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2429                 SCTP_INP_INFO_WUNLOCK();
2430                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2431                 return (ENOBUFS);
2432         }
2433         /* zap it */
2434         memset(inp, 0, sizeof(*inp));
2435
2436         /* bump generations */
2437         /* setup socket pointers */
2438         inp->sctp_socket = so;
2439         inp->ip_inp.inp.inp_socket = so;
2440         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2441 #ifdef INET6
2442         if (INP_SOCKAF(so) == AF_INET6) {
2443                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2444                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2445                 }
2446                 if (MODULE_GLOBAL(ip6_v6only)) {
2447                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2448                 }
2449         }
2450 #endif
2451         inp->sctp_associd_counter = 1;
2452         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2453         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2454         inp->max_cwnd = 0;
2455         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2456         inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable);
2457         inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable);
2458         inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable);
2459         inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable);
2460         inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2461         inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2462         inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2463         inp->idata_supported = 0;
2464
2465         inp->fibnum = so->so_fibnum;
2466         /* init the small hash table we use to track asocid <-> tcb */
2467         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2468         if (inp->sctp_asocidhash == NULL) {
2469                 crfree(inp->ip_inp.inp.inp_cred);
2470                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2471                 SCTP_INP_INFO_WUNLOCK();
2472                 return (ENOBUFS);
2473         }
2474         SCTP_INCR_EP_COUNT();
2475         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2476         SCTP_INP_INFO_WUNLOCK();
2477
2478         so->so_pcb = (caddr_t)inp;
2479
2480         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2481                 /* UDP style socket */
2482                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2483                     SCTP_PCB_FLAGS_UNBOUND);
2484                 /* Be sure it is NON-BLOCKING IO for UDP */
2485                 /* SCTP_SET_SO_NBIO(so); */
2486         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2487                 /* TCP style socket */
2488                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2489                     SCTP_PCB_FLAGS_UNBOUND);
2490                 /* Be sure we have blocking IO by default */
2491                 SOCK_LOCK(so);
2492                 SCTP_CLEAR_SO_NBIO(so);
2493                 SOCK_UNLOCK(so);
2494         } else {
2495                 /*
2496                  * unsupported socket type (RAW, etc)- in case we missed it
2497                  * in protosw
2498                  */
2499                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2500                 so->so_pcb = NULL;
2501                 crfree(inp->ip_inp.inp.inp_cred);
2502                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2503                 return (EOPNOTSUPP);
2504         }
2505         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2506                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2507                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2508         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2509                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2510                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2511         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2512                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2513                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2514         }
2515         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2516             &inp->sctp_hashmark);
2517         if (inp->sctp_tcbhash == NULL) {
2518                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2519                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2520                 so->so_pcb = NULL;
2521                 crfree(inp->ip_inp.inp.inp_cred);
2522                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2523                 return (ENOBUFS);
2524         }
2525         inp->def_vrf_id = vrf_id;
2526
2527         SCTP_INP_INFO_WLOCK();
2528         SCTP_INP_LOCK_INIT(inp);
2529         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2530         SCTP_INP_READ_INIT(inp);
2531         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2532         /* lock the new ep */
2533         SCTP_INP_WLOCK(inp);
2534
2535         /* add it to the info area */
2536         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2537         SCTP_INP_INFO_WUNLOCK();
2538
2539         TAILQ_INIT(&inp->read_queue);
2540         LIST_INIT(&inp->sctp_addr_list);
2541
2542         LIST_INIT(&inp->sctp_asoc_list);
2543
2544 #ifdef SCTP_TRACK_FREED_ASOCS
2545         /* TEMP CODE */
2546         LIST_INIT(&inp->sctp_asoc_free_list);
2547 #endif
2548         /* Init the timer structure for signature change */
2549         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2550         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2551
2552         /* now init the actual endpoint default data */
2553         m = &inp->sctp_ep;
2554
2555         /* setup the base timeout information */
2556         m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC);      /* needed ? */
2557         m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC);      /* needed ? */
2558         m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2559         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2560         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2561         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2562         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2563         /* all max/min max are in ms */
2564         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2565         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2566         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2567         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2568         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2569         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2570         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2571         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2572         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2573         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2574         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2575         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2576         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2577
2578         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2579         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2580         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2581         /* number of streams to pre-open on a association */
2582         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2583
2584         m->default_mtu = 0;
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 = sctp_msecs_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                         memset(laddr, 0, 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.delete_prim_timer.ep = (void *)new_inp;
2747         /* now what about the nets? */
2748         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2749                 net->pmtu_timer.ep = (void *)new_inp;
2750                 net->hb_timer.ep = (void *)new_inp;
2751                 net->rxt_timer.ep = (void *)new_inp;
2752         }
2753         SCTP_INP_WUNLOCK(new_inp);
2754         SCTP_INP_WUNLOCK(old_inp);
2755 }
2756
2757 /*
2758  * insert an laddr entry with the given ifa for the desired list
2759  */
2760 static int
2761 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2762 {
2763         struct sctp_laddr *laddr;
2764
2765         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2766         if (laddr == NULL) {
2767                 /* out of memory? */
2768                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2769                 return (EINVAL);
2770         }
2771         SCTP_INCR_LADDR_COUNT();
2772         memset(laddr, 0, sizeof(*laddr));
2773         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2774         laddr->ifa = ifa;
2775         laddr->action = act;
2776         atomic_add_int(&ifa->refcount, 1);
2777         /* insert it */
2778         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2779
2780         return (0);
2781 }
2782
2783 /*
2784  * Remove an laddr entry from the local address list (on an assoc)
2785  */
2786 static void
2787 sctp_remove_laddr(struct sctp_laddr *laddr)
2788 {
2789
2790         /* remove from the list */
2791         LIST_REMOVE(laddr, sctp_nxt_addr);
2792         sctp_free_ifa(laddr->ifa);
2793         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2794         SCTP_DECR_LADDR_COUNT();
2795 }
2796
2797
2798
2799 /* sctp_ifap is used to bypass normal local address validation checks */
2800 int
2801 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2802     struct sctp_ifa *sctp_ifap, struct thread *p)
2803 {
2804         /* bind a ep to a socket address */
2805         struct sctppcbhead *head;
2806         struct sctp_inpcb *inp, *inp_tmp;
2807         struct inpcb *ip_inp;
2808         int port_reuse_active = 0;
2809         int bindall;
2810         uint16_t lport;
2811         int error;
2812         uint32_t vrf_id;
2813
2814         lport = 0;
2815         bindall = 1;
2816         inp = (struct sctp_inpcb *)so->so_pcb;
2817         ip_inp = (struct inpcb *)so->so_pcb;
2818 #ifdef SCTP_DEBUG
2819         if (addr) {
2820                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2821                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2822                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2823                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2824         }
2825 #endif
2826         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2827                 /* already did a bind, subsequent binds NOT allowed ! */
2828                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2829                 return (EINVAL);
2830         }
2831 #ifdef INVARIANTS
2832         if (p == NULL)
2833                 panic("null proc/thread");
2834 #endif
2835         if (addr != NULL) {
2836                 switch (addr->sa_family) {
2837 #ifdef INET
2838                 case AF_INET:
2839                         {
2840                                 struct sockaddr_in *sin;
2841
2842                                 /* IPV6_V6ONLY socket? */
2843                                 if (SCTP_IPV6_V6ONLY(inp)) {
2844                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2845                                         return (EINVAL);
2846                                 }
2847                                 if (addr->sa_len != sizeof(*sin)) {
2848                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2849                                         return (EINVAL);
2850                                 }
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                                 /*
2873                                  * Only for pure IPv6 Address. (No IPv4
2874                                  * Mapped!)
2875                                  */
2876                                 struct sockaddr_in6 *sin6;
2877
2878                                 sin6 = (struct sockaddr_in6 *)addr;
2879
2880                                 if (addr->sa_len != sizeof(*sin6)) {
2881                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2882                                         return (EINVAL);
2883                                 }
2884                                 lport = sin6->sin6_port;
2885                                 /*
2886                                  * For LOOPBACK the prison_local_ip6() call
2887                                  * will transmute the ipv6 address to the
2888                                  * proper value.
2889                                  */
2890                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2891                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2892                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2893                                         return (error);
2894                                 }
2895                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2896                                         bindall = 0;
2897                                         /* KAME hack: embed scopeid */
2898                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2899                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2900                                                 return (EINVAL);
2901                                         }
2902                                 }
2903                                 /* this must be cleared for ifa_ifwithaddr() */
2904                                 sin6->sin6_scope_id = 0;
2905                                 break;
2906                         }
2907 #endif
2908                 default:
2909                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2910                         return (EAFNOSUPPORT);
2911                 }
2912         }
2913         SCTP_INP_INFO_WLOCK();
2914         SCTP_INP_WLOCK(inp);
2915         /* Setup a vrf_id to be the default for the non-bind-all case. */
2916         vrf_id = inp->def_vrf_id;
2917
2918         /* increase our count due to the unlock we do */
2919         SCTP_INP_INCR_REF(inp);
2920         if (lport) {
2921                 /*
2922                  * Did the caller specify a port? if so we must see if an ep
2923                  * already has this one bound.
2924                  */
2925                 /* got to be root to get at low ports */
2926                 if (ntohs(lport) < IPPORT_RESERVED) {
2927                         if ((p != NULL) && ((error =
2928                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2929                             ) != 0)) {
2930                                 SCTP_INP_DECR_REF(inp);
2931                                 SCTP_INP_WUNLOCK(inp);
2932                                 SCTP_INP_INFO_WUNLOCK();
2933                                 return (error);
2934                         }
2935                 }
2936                 SCTP_INP_WUNLOCK(inp);
2937                 if (bindall) {
2938                         vrf_id = inp->def_vrf_id;
2939                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2940                         if (inp_tmp != NULL) {
2941                                 /*
2942                                  * lock guy returned and lower count note
2943                                  * that we are not bound so inp_tmp should
2944                                  * NEVER be inp. And it is this inp
2945                                  * (inp_tmp) that gets the reference bump,
2946                                  * so we must lower it.
2947                                  */
2948                                 SCTP_INP_DECR_REF(inp_tmp);
2949                                 /* unlock info */
2950                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2951                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2952                                         /*
2953                                          * Ok, must be one-2-one and
2954                                          * allowing port re-use
2955                                          */
2956                                         port_reuse_active = 1;
2957                                         goto continue_anyway;
2958                                 }
2959                                 SCTP_INP_DECR_REF(inp);
2960                                 SCTP_INP_INFO_WUNLOCK();
2961                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2962                                 return (EADDRINUSE);
2963                         }
2964                 } else {
2965                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2966                         if (inp_tmp != NULL) {
2967                                 /*
2968                                  * lock guy returned and lower count note
2969                                  * that we are not bound so inp_tmp should
2970                                  * NEVER be inp. And it is this inp
2971                                  * (inp_tmp) that gets the reference bump,
2972                                  * so we must lower it.
2973                                  */
2974                                 SCTP_INP_DECR_REF(inp_tmp);
2975                                 /* unlock info */
2976                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2977                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2978                                         /*
2979                                          * Ok, must be one-2-one and
2980                                          * allowing port re-use
2981                                          */
2982                                         port_reuse_active = 1;
2983                                         goto continue_anyway;
2984                                 }
2985                                 SCTP_INP_DECR_REF(inp);
2986                                 SCTP_INP_INFO_WUNLOCK();
2987                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2988                                 return (EADDRINUSE);
2989                         }
2990                 }
2991 continue_anyway:
2992                 SCTP_INP_WLOCK(inp);
2993                 if (bindall) {
2994                         /* verify that no lport is not used by a singleton */
2995                         if ((port_reuse_active == 0) &&
2996                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
2997                                 /* Sorry someone already has this one bound */
2998                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2999                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3000                                         port_reuse_active = 1;
3001                                 } else {
3002                                         SCTP_INP_DECR_REF(inp);
3003                                         SCTP_INP_WUNLOCK(inp);
3004                                         SCTP_INP_INFO_WUNLOCK();
3005                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3006                                         return (EADDRINUSE);
3007                                 }
3008                         }
3009                 }
3010         } else {
3011                 uint16_t first, last, candidate;
3012                 uint16_t count;
3013                 int done;
3014
3015                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3016                         first = MODULE_GLOBAL(ipport_hifirstauto);
3017                         last = MODULE_GLOBAL(ipport_hilastauto);
3018                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3019                         if (p && (error =
3020                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3021                             )) {
3022                                 SCTP_INP_DECR_REF(inp);
3023                                 SCTP_INP_WUNLOCK(inp);
3024                                 SCTP_INP_INFO_WUNLOCK();
3025                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3026                                 return (error);
3027                         }
3028                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3029                         last = MODULE_GLOBAL(ipport_lowlastauto);
3030                 } else {
3031                         first = MODULE_GLOBAL(ipport_firstauto);
3032                         last = MODULE_GLOBAL(ipport_lastauto);
3033                 }
3034                 if (first > last) {
3035                         uint16_t temp;
3036
3037                         temp = first;
3038                         first = last;
3039                         last = temp;
3040                 }
3041                 count = last - first + 1;       /* number of candidates */
3042                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3043
3044                 done = 0;
3045                 while (!done) {
3046                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3047                                 done = 1;
3048                         }
3049                         if (!done) {
3050                                 if (--count == 0) {
3051                                         SCTP_INP_DECR_REF(inp);
3052                                         SCTP_INP_WUNLOCK(inp);
3053                                         SCTP_INP_INFO_WUNLOCK();
3054                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3055                                         return (EADDRINUSE);
3056                                 }
3057                                 if (candidate == last)
3058                                         candidate = first;
3059                                 else
3060                                         candidate = candidate + 1;
3061                         }
3062                 }
3063                 lport = htons(candidate);
3064         }
3065         SCTP_INP_DECR_REF(inp);
3066         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3067             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3068                 /*
3069                  * this really should not happen. The guy did a non-blocking
3070                  * bind and then did a close at the same time.
3071                  */
3072                 SCTP_INP_WUNLOCK(inp);
3073                 SCTP_INP_INFO_WUNLOCK();
3074                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3075                 return (EINVAL);
3076         }
3077         /* ok we look clear to give out this port, so lets setup the binding */
3078         if (bindall) {
3079                 /* binding to all addresses, so just set in the proper flags */
3080                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3081                 /* set the automatic addr changes from kernel flag */
3082                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3083                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3084                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3085                 } else {
3086                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3087                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3088                 }
3089                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3090                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3091                 } else {
3092                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3093                 }
3094                 /*
3095                  * set the automatic mobility_base from kernel flag (by
3096                  * micchie)
3097                  */
3098                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3099                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3100                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3101                 } else {
3102                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3103                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3104                 }
3105                 /*
3106                  * set the automatic mobility_fasthandoff from kernel flag
3107                  * (by micchie)
3108                  */
3109                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3110                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3111                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3112                 } else {
3113                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3114                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3115                 }
3116         } else {
3117                 /*
3118                  * bind specific, make sure flags is off and add a new
3119                  * address structure to the sctp_addr_list inside the ep
3120                  * structure.
3121                  *
3122                  * We will need to allocate one and insert it at the head.
3123                  * The socketopt call can just insert new addresses in there
3124                  * as well. It will also have to do the embed scope kame
3125                  * hack too (before adding).
3126                  */
3127                 struct sctp_ifa *ifa;
3128                 union sctp_sockstore store;
3129
3130                 memset(&store, 0, sizeof(store));
3131                 switch (addr->sa_family) {
3132 #ifdef INET
3133                 case AF_INET:
3134                         memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3135                         store.sin.sin_port = 0;
3136                         break;
3137 #endif
3138 #ifdef INET6
3139                 case AF_INET6:
3140                         memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3141                         store.sin6.sin6_port = 0;
3142                         break;
3143 #endif
3144                 default:
3145                         break;
3146                 }
3147                 /*
3148                  * first find the interface with the bound address need to
3149                  * zero out the port to find the address! yuck! can't do
3150                  * this earlier since need port for sctp_pcb_findep()
3151                  */
3152                 if (sctp_ifap != NULL) {
3153                         ifa = sctp_ifap;
3154                 } else {
3155                         /*
3156                          * Note for BSD we hit here always other O/S's will
3157                          * pass things in via the sctp_ifap argument
3158                          * (Panda).
3159                          */
3160                         ifa = sctp_find_ifa_by_addr(&store.sa,
3161                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3162                 }
3163                 if (ifa == NULL) {
3164                         /* Can't find an interface with that address */
3165                         SCTP_INP_WUNLOCK(inp);
3166                         SCTP_INP_INFO_WUNLOCK();
3167                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3168                         return (EADDRNOTAVAIL);
3169                 }
3170 #ifdef INET6
3171                 if (addr->sa_family == AF_INET6) {
3172                         /* GAK, more FIXME IFA lock? */
3173                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3174                                 /* Can't bind a non-existent addr. */
3175                                 SCTP_INP_WUNLOCK(inp);
3176                                 SCTP_INP_INFO_WUNLOCK();
3177                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3178                                 return (EINVAL);
3179                         }
3180                 }
3181 #endif
3182                 /* we're not bound all */
3183                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3184                 /* allow bindx() to send ASCONF's for binding changes */
3185                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3186                 /* clear automatic addr changes from kernel flag */
3187                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3188
3189                 /* add this address to the endpoint list */
3190                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3191                 if (error != 0) {
3192                         SCTP_INP_WUNLOCK(inp);
3193                         SCTP_INP_INFO_WUNLOCK();
3194                         return (error);
3195                 }
3196                 inp->laddr_count++;
3197         }
3198         /* find the bucket */
3199         if (port_reuse_active) {
3200                 /* Put it into tcp 1-2-1 hash */
3201                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3202                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3203         } else {
3204                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3205         }
3206         /* put it in the bucket */
3207         LIST_INSERT_HEAD(head, inp, sctp_hash);
3208         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3209             (void *)head, ntohs(lport), port_reuse_active);
3210         /* set in the port */
3211         inp->sctp_lport = lport;
3212
3213         /* turn off just the unbound flag */
3214         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3215         SCTP_INP_WUNLOCK(inp);
3216         SCTP_INP_INFO_WUNLOCK();
3217         return (0);
3218 }
3219
3220
3221 static void
3222 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3223 {
3224         struct sctp_iterator *it, *nit;
3225
3226         /*
3227          * We enter with the only the ITERATOR_LOCK in place and a write
3228          * lock on the inp_info stuff.
3229          */
3230         it = sctp_it_ctl.cur_it;
3231         if (it && (it->vn != curvnet)) {
3232                 /* Its not looking at our VNET */
3233                 return;
3234         }
3235         if (it && (it->inp == inp)) {
3236                 /*
3237                  * This is tricky and we hold the iterator lock, but when it
3238                  * returns and gets the lock (when we release it) the
3239                  * iterator will try to operate on inp. We need to stop that
3240                  * from happening. But of course the iterator has a
3241                  * reference on the stcb and inp. We can mark it and it will
3242                  * stop.
3243                  *
3244                  * If its a single iterator situation, we set the end
3245                  * iterator flag. Otherwise we set the iterator to go to the
3246                  * next inp.
3247                  *
3248                  */
3249                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3250                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3251                 } else {
3252                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3253                 }
3254         }
3255         /*
3256          * Now go through and remove any single reference to our inp that
3257          * may be still pending on the list
3258          */
3259         SCTP_IPI_ITERATOR_WQ_LOCK();
3260         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3261                 if (it->vn != curvnet) {
3262                         continue;
3263                 }
3264                 if (it->inp == inp) {
3265                         /* This one points to me is it inp specific? */
3266                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3267                                 /* Remove and free this one */
3268                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3269                                     it, sctp_nxt_itr);
3270                                 if (it->function_atend != NULL) {
3271                                         (*it->function_atend) (it->pointer, it->val);
3272                                 }
3273                                 SCTP_FREE(it, SCTP_M_ITER);
3274                         } else {
3275                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3276                                 if (it->inp) {
3277                                         SCTP_INP_INCR_REF(it->inp);
3278                                 }
3279                         }
3280                         /*
3281                          * When its put in the refcnt is incremented so decr
3282                          * it
3283                          */
3284                         SCTP_INP_DECR_REF(inp);
3285                 }
3286         }
3287         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3288 }
3289
3290 /* release sctp_inpcb unbind the port */
3291 void
3292 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3293 {
3294         /*
3295          * Here we free a endpoint. We must find it (if it is in the Hash
3296          * table) and remove it from there. Then we must also find it in the
3297          * overall list and remove it from there. After all removals are
3298          * complete then any timer has to be stopped. Then start the actual
3299          * freeing. a) Any local lists. b) Any associations. c) The hash of
3300          * all associations. d) finally the ep itself.
3301          */
3302         struct sctp_tcb *asoc, *nasoc;
3303         struct sctp_laddr *laddr, *nladdr;
3304         struct inpcb *ip_pcb;
3305         struct socket *so;
3306         int being_refed = 0;
3307         struct sctp_queued_to_read *sq, *nsq;
3308         int cnt;
3309         sctp_sharedkey_t *shared_key, *nshared_key;
3310
3311
3312 #ifdef SCTP_LOG_CLOSING
3313         sctp_log_closing(inp, NULL, 0);
3314 #endif
3315         SCTP_ITERATOR_LOCK();
3316         /* mark any iterators on the list or being processed */
3317         sctp_iterator_inp_being_freed(inp);
3318         SCTP_ITERATOR_UNLOCK();
3319         so = inp->sctp_socket;
3320         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3321                 /* been here before.. eeks.. get out of here */
3322                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3323 #ifdef SCTP_LOG_CLOSING
3324                 sctp_log_closing(inp, NULL, 1);
3325 #endif
3326                 return;
3327         }
3328         SCTP_ASOC_CREATE_LOCK(inp);
3329         SCTP_INP_INFO_WLOCK();
3330
3331         SCTP_INP_WLOCK(inp);
3332         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3333                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3334                 /* socket is gone, so no more wakeups allowed */
3335                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3336                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3337                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3338
3339         }
3340         /* First time through we have the socket lock, after that no more. */
3341         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3342             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3343
3344         if (inp->control) {
3345                 sctp_m_freem(inp->control);
3346                 inp->control = NULL;
3347         }
3348         if (inp->pkt) {
3349                 sctp_m_freem(inp->pkt);
3350                 inp->pkt = NULL;
3351         }
3352         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3353                                          * here but I will be nice :> (i.e.
3354                                          * ip_pcb = ep;) */
3355         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3356                 int cnt_in_sd;
3357
3358                 cnt_in_sd = 0;
3359                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3360                         SCTP_TCB_LOCK(asoc);
3361                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3362                                 /* Skip guys being freed */
3363                                 cnt_in_sd++;
3364                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3365                                         /*
3366                                          * Special case - we did not start a
3367                                          * kill timer on the asoc due to it
3368                                          * was not closed. So go ahead and
3369                                          * start it now.
3370                                          */
3371                                         SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3372                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3373                                 }
3374                                 SCTP_TCB_UNLOCK(asoc);
3375                                 continue;
3376                         }
3377                         if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
3378                             (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3379                             (asoc->asoc.total_output_queue_size == 0)) {
3380                                 /*
3381                                  * If we have data in queue, we don't want
3382                                  * to just free since the app may have done,
3383                                  * send()/close or connect/send/close. And
3384                                  * it wants the data to get across first.
3385                                  */
3386                                 /* Just abandon things in the front states */
3387                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3388                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3389                                         cnt_in_sd++;
3390                                 }
3391                                 continue;
3392                         }
3393                         /* Disconnect the socket please */
3394                         asoc->sctp_socket = NULL;
3395                         SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET);
3396                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3397                             (asoc->asoc.control_pdapi) ||
3398                             (asoc->asoc.size_on_all_streams > 0) ||
3399                             (so && (so->so_rcv.sb_cc > 0))) {
3400                                 /* Left with Data unread */
3401                                 struct mbuf *op_err;
3402
3403                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3404                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3405                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3406                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3407                                 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3408                                     (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3409                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3410                                 }
3411                                 if (sctp_free_assoc(inp, asoc,
3412                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3413                                         cnt_in_sd++;
3414                                 }
3415                                 continue;
3416                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3417                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3418                             (asoc->asoc.stream_queue_cnt == 0)) {
3419                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3420                                         goto abort_anyway;
3421                                 }
3422                                 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3423                                     (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3424                                         struct sctp_nets *netp;
3425
3426                                         /*
3427                                          * there is nothing queued to send,
3428                                          * so I send shutdown
3429                                          */
3430                                         if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3431                                             (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3432                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3433                                         }
3434                                         SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
3435                                         sctp_stop_timers_for_shutdown(asoc);
3436                                         if (asoc->asoc.alternate) {
3437                                                 netp = asoc->asoc.alternate;
3438                                         } else {
3439                                                 netp = asoc->asoc.primary_destination;
3440                                         }
3441                                         sctp_send_shutdown(asoc, netp);
3442                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3443                                             netp);
3444                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
3445                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3446                                 }
3447                         } else {
3448                                 /* mark into shutdown pending */
3449                                 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
3450                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
3451                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3452                                         SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT);
3453                                 }
3454                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3455                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3456                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3457                                         struct mbuf *op_err;
3458
3459                         abort_anyway:
3460                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3461                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3462                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3463                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3464                                         if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3465                                             (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3466                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3467                                         }
3468                                         if (sctp_free_assoc(inp, asoc,
3469                                             SCTP_PCBFREE_NOFORCE,
3470                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3471                                                 cnt_in_sd++;
3472                                         }
3473                                         continue;
3474                                 } else {
3475                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3476                                 }
3477                         }
3478                         cnt_in_sd++;
3479                         SCTP_TCB_UNLOCK(asoc);
3480                 }
3481                 /* now is there some left in our SHUTDOWN state? */
3482                 if (cnt_in_sd) {
3483 #ifdef SCTP_LOG_CLOSING
3484                         sctp_log_closing(inp, NULL, 2);
3485 #endif
3486                         inp->sctp_socket = NULL;
3487                         SCTP_INP_WUNLOCK(inp);
3488                         SCTP_ASOC_CREATE_UNLOCK(inp);
3489                         SCTP_INP_INFO_WUNLOCK();
3490                         return;
3491                 }
3492         }
3493         inp->sctp_socket = NULL;
3494         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3495             SCTP_PCB_FLAGS_UNBOUND) {
3496                 /*
3497                  * ok, this guy has been bound. It's port is somewhere in
3498                  * the SCTP_BASE_INFO(hash table). Remove it!
3499                  */
3500                 LIST_REMOVE(inp, sctp_hash);
3501                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3502         }
3503
3504         /*
3505          * If there is a timer running to kill us, forget it, since it may
3506          * have a contest on the INP lock.. which would cause us to die ...
3507          */
3508         cnt = 0;
3509         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3510                 SCTP_TCB_LOCK(asoc);
3511                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3512                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3513                                 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3514                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3515                         }
3516                         cnt++;
3517                         SCTP_TCB_UNLOCK(asoc);
3518                         continue;
3519                 }
3520                 /* Free associations that are NOT killing us */
3521                 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
3522                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3523                         struct mbuf *op_err;
3524
3525                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3526                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3527                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3528                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3529                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3530                         cnt++;
3531                         SCTP_TCB_UNLOCK(asoc);
3532                         continue;
3533                 }
3534                 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3535                     (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3536                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3537                 }
3538                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3539                     SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3540                         cnt++;
3541                 }
3542         }
3543         if (cnt) {
3544                 /* Ok we have someone out there that will kill us */
3545 #ifdef SCTP_LOG_CLOSING
3546                 sctp_log_closing(inp, NULL, 3);
3547 #endif
3548                 SCTP_INP_WUNLOCK(inp);
3549                 SCTP_ASOC_CREATE_UNLOCK(inp);
3550                 SCTP_INP_INFO_WUNLOCK();
3551                 return;
3552         }
3553         if (SCTP_INP_LOCK_CONTENDED(inp))
3554                 being_refed++;
3555         if (SCTP_INP_READ_CONTENDED(inp))
3556                 being_refed++;
3557         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3558                 being_refed++;
3559
3560         if ((inp->refcount) ||
3561             (being_refed) ||
3562             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3563 #ifdef SCTP_LOG_CLOSING
3564                 sctp_log_closing(inp, NULL, 4);
3565 #endif
3566                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3567                 SCTP_INP_WUNLOCK(inp);
3568                 SCTP_ASOC_CREATE_UNLOCK(inp);
3569                 SCTP_INP_INFO_WUNLOCK();
3570                 return;
3571         }
3572         inp->sctp_ep.signature_change.type = 0;
3573         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3574         /*
3575          * Remove it from the list .. last thing we need a lock for.
3576          */
3577         LIST_REMOVE(inp, sctp_list);
3578         SCTP_INP_WUNLOCK(inp);
3579         SCTP_ASOC_CREATE_UNLOCK(inp);
3580         SCTP_INP_INFO_WUNLOCK();
3581         /*
3582          * Now we release all locks. Since this INP cannot be found anymore
3583          * except possibly by the kill timer that might be running. We call
3584          * the drain function here. It should hit the case were it sees the
3585          * ACTIVE flag cleared and exit out freeing us to proceed and
3586          * destroy everything.
3587          */
3588         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3589                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3590         } else {
3591                 /* Probably un-needed */
3592                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3593         }
3594
3595 #ifdef SCTP_LOG_CLOSING
3596         sctp_log_closing(inp, NULL, 5);
3597 #endif
3598
3599
3600         if ((inp->sctp_asocidhash) != NULL) {
3601                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3602                 inp->sctp_asocidhash = NULL;
3603         }
3604         /* sa_ignore FREED_MEMORY */
3605         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3606                 /* Its only abandoned if it had data left */
3607                 if (sq->length)
3608                         SCTP_STAT_INCR(sctps_left_abandon);
3609
3610                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3611                 sctp_free_remote_addr(sq->whoFrom);
3612                 if (so)
3613                         so->so_rcv.sb_cc -= sq->length;
3614                 if (sq->data) {
3615                         sctp_m_freem(sq->data);
3616                         sq->data = NULL;
3617                 }
3618                 /*
3619                  * no need to free the net count, since at this point all
3620                  * assoc's are gone.
3621                  */
3622                 sctp_free_a_readq(NULL, sq);
3623         }
3624         /* Now the sctp_pcb things */
3625         /*
3626          * free each asoc if it is not already closed/free. we can't use the
3627          * macro here since le_next will get freed as part of the
3628          * sctp_free_assoc() call.
3629          */
3630         if (ip_pcb->inp_options) {
3631                 (void)sctp_m_free(ip_pcb->inp_options);
3632                 ip_pcb->inp_options = 0;
3633         }
3634
3635
3636 #ifdef INET6
3637         if (ip_pcb->inp_vflag & INP_IPV6) {
3638                 ip6_freepcbopts(ip_pcb->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 zero 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         memset(net, 0, sizeof(struct sctp_nets));
3853         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3854         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3855         switch (newaddr->sa_family) {
3856 #ifdef INET
3857         case AF_INET:
3858                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3859                 break;
3860 #endif
3861 #ifdef INET6
3862         case AF_INET6:
3863                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3864                 break;
3865 #endif
3866         default:
3867                 break;
3868         }
3869         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3870         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3871                 stcb->asoc.scope.loopback_scope = 1;
3872                 stcb->asoc.scope.ipv4_local_scope = 1;
3873                 stcb->asoc.scope.local_scope = 0;
3874                 stcb->asoc.scope.site_scope = 1;
3875                 addr_inscope = 1;
3876         }
3877         net->failure_threshold = stcb->asoc.def_net_failure;
3878         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3879         if (addr_inscope == 0) {
3880                 net->dest_state = (SCTP_ADDR_REACHABLE |
3881                     SCTP_ADDR_OUT_OF_SCOPE);
3882         } else {
3883                 if (from == SCTP_ADDR_IS_CONFIRMED)
3884                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3885                         net->dest_state = SCTP_ADDR_REACHABLE;
3886                 else
3887                         net->dest_state = SCTP_ADDR_REACHABLE |
3888                             SCTP_ADDR_UNCONFIRMED;
3889         }
3890         /*
3891          * We set this to 0, the timer code knows that this means its an
3892          * initial value
3893          */
3894         net->rto_needed = 1;
3895         net->RTO = 0;
3896         net->RTO_measured = 0;
3897         stcb->asoc.numnets++;
3898         net->ref_count = 1;
3899         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3900         net->port = port;
3901         net->dscp = stcb->asoc.default_dscp;
3902 #ifdef INET6
3903         net->flowlabel = stcb->asoc.default_flowlabel;
3904 #endif
3905         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3906                 net->dest_state |= SCTP_ADDR_NOHB;
3907         } else {
3908                 net->dest_state &= ~SCTP_ADDR_NOHB;
3909         }
3910         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3911                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3912         } else {
3913                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3914         }
3915         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3916         /* Init the timer structure */
3917         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3918         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3919         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3920
3921         /* Now generate a route for this guy */
3922 #ifdef INET6
3923         /* KAME hack: embed scopeid */
3924         if (newaddr->sa_family == AF_INET6) {
3925                 struct sockaddr_in6 *sin6;
3926
3927                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3928                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3929                 sin6->sin6_scope_id = 0;
3930         }
3931 #endif
3932         SCTP_RTALLOC((sctp_route_t *)&net->ro,
3933             stcb->asoc.vrf_id,
3934             stcb->sctp_ep->fibnum);
3935
3936         net->src_addr_selected = 0;
3937         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3938                 /* Get source address */
3939                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3940                     stcb,
3941                     (sctp_route_t *)&net->ro,
3942                     net,
3943                     0,
3944                     stcb->asoc.vrf_id);
3945                 if (stcb->asoc.default_mtu > 0) {
3946                         net->mtu = stcb->asoc.default_mtu;
3947                         switch (net->ro._l_addr.sa.sa_family) {
3948 #ifdef INET
3949                         case AF_INET:
3950                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
3951                                 break;
3952 #endif
3953 #ifdef INET6
3954                         case AF_INET6:
3955                                 net->mtu += SCTP_MIN_OVERHEAD;
3956                                 break;
3957 #endif
3958                         default:
3959                                 break;
3960                         }
3961 #if defined(INET) || defined(INET6)
3962                         if (net->port) {
3963                                 net->mtu += (uint32_t)sizeof(struct udphdr);
3964                         }
3965 #endif
3966                 } else if (net->ro._s_addr != NULL) {
3967                         uint32_t imtu, rmtu, hcmtu;
3968
3969                         net->src_addr_selected = 1;
3970                         /* Now get the interface MTU */
3971                         if (net->ro._s_addr->ifn_p != NULL) {
3972                                 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3973                         } else {
3974                                 imtu = 0;
3975                         }
3976                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3977                         hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum);
3978                         net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu);
3979                         if (rmtu == 0) {
3980                                 /*
3981                                  * Start things off to match mtu of
3982                                  * interface please.
3983                                  */
3984                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3985                                     net->ro.ro_rt, net->mtu);
3986                         }
3987                 }
3988         }
3989         if (net->mtu == 0) {
3990                 if (stcb->asoc.default_mtu > 0) {
3991                         net->mtu = stcb->asoc.default_mtu;
3992                         switch (net->ro._l_addr.sa.sa_family) {
3993 #ifdef INET
3994                         case AF_INET:
3995                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
3996                                 break;
3997 #endif
3998 #ifdef INET6
3999                         case AF_INET6:
4000                                 net->mtu += SCTP_MIN_OVERHEAD;
4001                                 break;
4002 #endif
4003                         default:
4004                                 break;
4005                         }
4006 #if defined(INET) || defined(INET6)
4007                         if (net->port) {
4008                                 net->mtu += (uint32_t)sizeof(struct udphdr);
4009                         }
4010 #endif
4011                 } else {
4012                         switch (newaddr->sa_family) {
4013 #ifdef INET
4014                         case AF_INET:
4015                                 net->mtu = SCTP_DEFAULT_MTU;
4016                                 break;
4017 #endif
4018 #ifdef INET6
4019                         case AF_INET6:
4020                                 net->mtu = 1280;
4021                                 break;
4022 #endif
4023                         default:
4024                                 break;
4025                         }
4026                 }
4027         }
4028 #if defined(INET) || defined(INET6)
4029         if (net->port) {
4030                 net->mtu -= (uint32_t)sizeof(struct udphdr);
4031         }
4032 #endif
4033         if (from == SCTP_ALLOC_ASOC) {
4034                 stcb->asoc.smallest_mtu = net->mtu;
4035         }
4036         if (stcb->asoc.smallest_mtu > net->mtu) {
4037                 sctp_pathmtu_adjustment(stcb, net->mtu);
4038         }
4039 #ifdef INET6
4040         if (newaddr->sa_family == AF_INET6) {
4041                 struct sockaddr_in6 *sin6;
4042
4043                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4044                 (void)sa6_recoverscope(sin6);
4045         }
4046 #endif
4047
4048         /* JRS - Use the congestion control given in the CC module */
4049         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4050                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4051
4052         /*
4053          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4054          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4055          */
4056         net->find_pseudo_cumack = 1;
4057         net->find_rtx_pseudo_cumack = 1;
4058         /* Choose an initial flowid. */
4059         net->flowid = stcb->asoc.my_vtag ^
4060             ntohs(stcb->rport) ^
4061             ntohs(stcb->sctp_ep->sctp_lport);
4062         net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4063         if (netp) {
4064                 *netp = net;
4065         }
4066         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4067         if (net->ro.ro_rt == NULL) {
4068                 /* Since we have no route put it at the back */
4069                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4070         } else if (netfirst == NULL) {
4071                 /* We are the first one in the pool. */
4072                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4073         } else if (netfirst->ro.ro_rt == NULL) {
4074                 /*
4075                  * First one has NO route. Place this one ahead of the first
4076                  * one.
4077                  */
4078                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4079         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4080                 /*
4081                  * This one has a different interface than the one at the
4082                  * top of the list. Place it ahead.
4083                  */
4084                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4085         } else {
4086                 /*
4087                  * Ok we have the same interface as the first one. Move
4088                  * forward until we find either a) one with a NULL route...
4089                  * insert ahead of that b) one with a different ifp.. insert
4090                  * after that. c) end of the list.. insert at the tail.
4091                  */
4092                 struct sctp_nets *netlook;
4093
4094                 do {
4095                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4096                         if (netlook == NULL) {
4097                                 /* End of the list */
4098                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4099                                 break;
4100                         } else if (netlook->ro.ro_rt == NULL) {
4101                                 /* next one has NO route */
4102                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4103                                 break;
4104                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4105                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4106                                     net, sctp_next);
4107                                 break;
4108                         }
4109                         /* Shift forward */
4110                         netfirst = netlook;
4111                 } while (netlook != NULL);
4112         }
4113
4114         /* got to have a primary set */
4115         if (stcb->asoc.primary_destination == 0) {
4116                 stcb->asoc.primary_destination = net;
4117         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4118                     (net->ro.ro_rt) &&
4119             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4120                 /* No route to current primary adopt new primary */
4121                 stcb->asoc.primary_destination = net;
4122         }
4123         /* Validate primary is first */
4124         net = TAILQ_FIRST(&stcb->asoc.nets);
4125         if ((net != stcb->asoc.primary_destination) &&
4126             (stcb->asoc.primary_destination)) {
4127                 /*
4128                  * first one on the list is NOT the primary sctp_cmpaddr()
4129                  * is much more efficient if the primary is the first on the
4130                  * list, make it so.
4131                  */
4132                 TAILQ_REMOVE(&stcb->asoc.nets,
4133                     stcb->asoc.primary_destination, sctp_next);
4134                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4135                     stcb->asoc.primary_destination, sctp_next);
4136         }
4137         return (0);
4138 }
4139
4140
4141 static uint32_t
4142 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4143 {
4144         uint32_t id;
4145         struct sctpasochead *head;
4146         struct sctp_tcb *lstcb;
4147
4148 try_again:
4149         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4150                 /* TSNH */
4151                 return (0);
4152         }
4153         /*
4154          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4155          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4156          */
4157         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4158                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4159         }
4160         id = inp->sctp_associd_counter;
4161         inp->sctp_associd_counter++;
4162         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4163         if (lstcb) {
4164                 goto try_again;
4165         }
4166         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4167         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4168         stcb->asoc.in_asocid_hash = 1;
4169         return (id);
4170 }
4171
4172 /*
4173  * allocate an association and add it to the endpoint. The caller must be
4174  * careful to add all additional addresses once they are know right away or
4175  * else the assoc will be may experience a blackout scenario.
4176  */
4177 struct sctp_tcb *
4178 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4179     int *error, uint32_t override_tag, uint32_t vrf_id,
4180     uint16_t o_streams, uint16_t port,
4181     struct thread *p,
4182     int initialize_auth_params)
4183 {
4184         /* note the p argument is only valid in unbound sockets */
4185
4186         struct sctp_tcb *stcb;
4187         struct sctp_association *asoc;
4188         struct sctpasochead *head;
4189         uint16_t rport;
4190         int err;
4191
4192         /*
4193          * Assumption made here: Caller has done a
4194          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4195          * address does not exist already.
4196          */
4197         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4198                 /* Hit max assoc, sorry no more */
4199                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4200                 *error = ENOBUFS;
4201                 return (NULL);
4202         }
4203         if (firstaddr == NULL) {
4204                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4205                 *error = EINVAL;
4206                 return (NULL);
4207         }
4208         SCTP_INP_RLOCK(inp);
4209         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4210             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4211             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4212                 /*
4213                  * If its in the TCP pool, its NOT allowed to create an
4214                  * association. The parent listener needs to call
4215                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4216                  * off, or connected one does this.. its an error.
4217                  */
4218                 SCTP_INP_RUNLOCK(inp);
4219                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4220                 *error = EINVAL;
4221                 return (NULL);
4222         }
4223         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4224             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4225                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4226                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4227                         SCTP_INP_RUNLOCK(inp);
4228                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4229                         *error = EINVAL;
4230                         return (NULL);
4231                 }
4232         }
4233         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4234 #ifdef SCTP_DEBUG
4235         if (firstaddr) {
4236                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4237                 switch (firstaddr->sa_family) {
4238 #ifdef INET
4239                 case AF_INET:
4240                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4241                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4242                         break;
4243 #endif
4244 #ifdef INET6
4245                 case AF_INET6:
4246                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4247                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4248                         break;
4249 #endif
4250                 default:
4251                         break;
4252                 }
4253         } else {
4254                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4255         }
4256 #endif                          /* SCTP_DEBUG */
4257         switch (firstaddr->sa_family) {
4258 #ifdef INET
4259         case AF_INET:
4260                 {
4261                         struct sockaddr_in *sin;
4262
4263                         sin = (struct sockaddr_in *)firstaddr;
4264                         if ((ntohs(sin->sin_port) == 0) ||
4265                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4266                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4267                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4268                                 /* Invalid address */
4269                                 SCTP_INP_RUNLOCK(inp);
4270                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4271                                 *error = EINVAL;
4272                                 return (NULL);
4273                         }
4274                         rport = sin->sin_port;
4275                         break;
4276                 }
4277 #endif
4278 #ifdef INET6
4279         case AF_INET6:
4280                 {
4281                         struct sockaddr_in6 *sin6;
4282
4283                         sin6 = (struct sockaddr_in6 *)firstaddr;
4284                         if ((ntohs(sin6->sin6_port) == 0) ||
4285                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4286                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4287                                 /* Invalid address */
4288                                 SCTP_INP_RUNLOCK(inp);
4289                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4290                                 *error = EINVAL;
4291                                 return (NULL);
4292                         }
4293                         rport = sin6->sin6_port;
4294                         break;
4295                 }
4296 #endif
4297         default:
4298                 /* not supported family type */
4299                 SCTP_INP_RUNLOCK(inp);
4300                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4301                 *error = EINVAL;
4302                 return (NULL);
4303         }
4304         SCTP_INP_RUNLOCK(inp);
4305         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4306                 /*
4307                  * If you have not performed a bind, then we need to do the
4308                  * ephemeral bind for you.
4309                  */
4310                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4311                     (struct sockaddr *)NULL,
4312                     (struct sctp_ifa *)NULL,
4313                     p
4314                     ))) {
4315                         /* bind error, probably perm */
4316                         *error = err;
4317                         return (NULL);
4318                 }
4319         }
4320         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4321         if (stcb == NULL) {
4322                 /* out of memory? */
4323                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4324                 *error = ENOMEM;
4325                 return (NULL);
4326         }
4327         SCTP_INCR_ASOC_COUNT();
4328
4329         memset(stcb, 0, sizeof(*stcb));
4330         asoc = &stcb->asoc;
4331
4332         SCTP_TCB_LOCK_INIT(stcb);
4333         SCTP_TCB_SEND_LOCK_INIT(stcb);
4334         stcb->rport = rport;
4335         /* setup back pointer's */
4336         stcb->sctp_ep = inp;
4337         stcb->sctp_socket = inp->sctp_socket;
4338         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
4339                 /* failed */
4340                 SCTP_TCB_LOCK_DESTROY(stcb);
4341                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4342                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4343                 SCTP_DECR_ASOC_COUNT();
4344                 *error = err;
4345                 return (NULL);
4346         }
4347         /* and the port */
4348         SCTP_INP_INFO_WLOCK();
4349         SCTP_INP_WLOCK(inp);
4350         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4351                 /* inpcb freed while alloc going on */
4352                 SCTP_TCB_LOCK_DESTROY(stcb);
4353                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4354                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4355                 SCTP_INP_WUNLOCK(inp);
4356                 SCTP_INP_INFO_WUNLOCK();
4357                 SCTP_DECR_ASOC_COUNT();
4358                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4359                 *error = EINVAL;
4360                 return (NULL);
4361         }
4362         SCTP_TCB_LOCK(stcb);
4363
4364         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4365         /* now that my_vtag is set, add it to the hash */
4366         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4367         /* put it in the bucket in the vtag hash of assoc's for the system */
4368         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4369         SCTP_INP_INFO_WUNLOCK();
4370
4371         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4372                 /* failure.. memory error? */
4373                 if (asoc->strmout) {
4374                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4375                         asoc->strmout = NULL;
4376                 }
4377                 if (asoc->mapping_array) {
4378                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4379                         asoc->mapping_array = NULL;
4380                 }
4381                 if (asoc->nr_mapping_array) {
4382                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4383                         asoc->nr_mapping_array = NULL;
4384                 }
4385                 SCTP_DECR_ASOC_COUNT();
4386                 SCTP_TCB_UNLOCK(stcb);
4387                 SCTP_TCB_LOCK_DESTROY(stcb);
4388                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4389                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4390                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4391                 SCTP_INP_WUNLOCK(inp);
4392                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4393                 *error = ENOBUFS;
4394                 return (NULL);
4395         }
4396         /* Init all the timers */
4397         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4398         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4399         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4400         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4401         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4402         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4403
4404         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4405         /* now file the port under the hash as well */
4406         if (inp->sctp_tcbhash != NULL) {
4407                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4408                     inp->sctp_hashmark)];
4409                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4410         }
4411         if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) {
4412                 sctp_initialize_auth_params(inp, stcb);
4413         }
4414         SCTP_INP_WUNLOCK(inp);
4415         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4416         return (stcb);
4417 }
4418
4419
4420 void
4421 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4422 {
4423         struct sctp_inpcb *inp;
4424         struct sctp_association *asoc;
4425
4426         inp = stcb->sctp_ep;
4427         asoc = &stcb->asoc;
4428         asoc->numnets--;
4429         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4430         if (net == asoc->primary_destination) {
4431                 /* Reset primary */
4432                 struct sctp_nets *lnet;
4433
4434                 lnet = TAILQ_FIRST(&asoc->nets);
4435                 /*
4436                  * Mobility adaptation Ideally, if deleted destination is
4437                  * the primary, it becomes a fast retransmission trigger by
4438                  * the subsequent SET PRIMARY. (by micchie)
4439                  */
4440                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4441                     SCTP_MOBILITY_BASE) ||
4442                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4443                     SCTP_MOBILITY_FASTHANDOFF)) {
4444                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4445                         if (asoc->deleted_primary != NULL) {
4446                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4447                                 goto out;
4448                         }
4449                         asoc->deleted_primary = net;
4450                         atomic_add_int(&net->ref_count, 1);
4451                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4452                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4453                         sctp_mobility_feature_on(stcb->sctp_ep,
4454                             SCTP_MOBILITY_PRIM_DELETED);
4455                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4456                             stcb->sctp_ep, stcb, NULL);
4457                 }
4458 out:
4459                 /* Try to find a confirmed primary */
4460                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4461         }
4462         if (net == asoc->last_data_chunk_from) {
4463                 /* Reset primary */
4464                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4465         }
4466         if (net == asoc->last_control_chunk_from) {
4467                 /* Clear net */
4468                 asoc->last_control_chunk_from = NULL;
4469         }
4470         if (net == stcb->asoc.alternate) {
4471                 sctp_free_remote_addr(stcb->asoc.alternate);
4472                 stcb->asoc.alternate = NULL;
4473         }
4474         sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
4475             SCTP_FROM_SCTP_PCB + SCTP_LOC_9);
4476         sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
4477             SCTP_FROM_SCTP_PCB + SCTP_LOC_10);
4478         net->dest_state |= SCTP_ADDR_BEING_DELETED;
4479         sctp_free_remote_addr(net);
4480 }
4481
4482 /*
4483  * remove a remote endpoint address from an association, it will fail if the
4484  * address does not exist.
4485  */
4486 int
4487 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4488 {
4489         /*
4490          * Here we need to remove a remote address. This is quite simple, we
4491          * first find it in the list of address for the association
4492          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4493          * on that item. Note we do not allow it to be removed if there are
4494          * no other addresses.
4495          */
4496         struct sctp_association *asoc;
4497         struct sctp_nets *net, *nnet;
4498
4499         asoc = &stcb->asoc;
4500
4501         /* locate the address */
4502         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4503                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4504                         continue;
4505                 }
4506                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4507                     remaddr)) {
4508                         /* we found the guy */
4509                         if (asoc->numnets < 2) {
4510                                 /* Must have at LEAST two remote addresses */
4511                                 return (-1);
4512                         } else {
4513                                 sctp_remove_net(stcb, net);
4514                                 return (0);
4515                         }
4516                 }
4517         }
4518         /* not found. */
4519         return (-2);
4520 }
4521
4522 void
4523 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4524 {
4525         struct sctpvtaghead *chain;
4526         struct sctp_tagblock *twait_block;
4527         int found = 0;
4528         int i;
4529
4530         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4531         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4532                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4533                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4534                             (twait_block->vtag_block[i].lport == lport) &&
4535                             (twait_block->vtag_block[i].rport == rport)) {
4536                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4537                                 twait_block->vtag_block[i].v_tag = 0;
4538                                 twait_block->vtag_block[i].lport = 0;
4539                                 twait_block->vtag_block[i].rport = 0;
4540                                 found = 1;
4541                                 break;
4542                         }
4543                 }
4544                 if (found)
4545                         break;
4546         }
4547 }
4548
4549 int
4550 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4551 {
4552         struct sctpvtaghead *chain;
4553         struct sctp_tagblock *twait_block;
4554         int found = 0;
4555         int i;
4556
4557         SCTP_INP_INFO_WLOCK();
4558         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4559         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4560                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4561                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4562                             (twait_block->vtag_block[i].lport == lport) &&
4563                             (twait_block->vtag_block[i].rport == rport)) {
4564                                 found = 1;
4565                                 break;
4566                         }
4567                 }
4568                 if (found)
4569                         break;
4570         }
4571         SCTP_INP_INFO_WUNLOCK();
4572         return (found);
4573 }
4574
4575
4576 void
4577 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4578 {
4579         struct sctpvtaghead *chain;
4580         struct sctp_tagblock *twait_block;
4581         struct timeval now;
4582         int set, i;
4583
4584         if (time == 0) {
4585                 /* Its disabled */
4586                 return;
4587         }
4588         (void)SCTP_GETTIME_TIMEVAL(&now);
4589         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4590         set = 0;
4591         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4592                 /* Block(s) present, lets find space, and expire on the fly */
4593                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4594                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4595                             !set) {
4596                                 twait_block->vtag_block[i].tv_sec_at_expire =
4597                                     now.tv_sec + time;
4598                                 twait_block->vtag_block[i].v_tag = tag;
4599                                 twait_block->vtag_block[i].lport = lport;
4600                                 twait_block->vtag_block[i].rport = rport;
4601                                 set = 1;
4602                         } else if ((twait_block->vtag_block[i].v_tag) &&
4603                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4604                                 /* Audit expires this guy */
4605                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4606                                 twait_block->vtag_block[i].v_tag = 0;
4607                                 twait_block->vtag_block[i].lport = 0;
4608                                 twait_block->vtag_block[i].rport = 0;
4609                                 if (set == 0) {
4610                                         /* Reuse it for my new tag */
4611                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4612                                         twait_block->vtag_block[i].v_tag = tag;
4613                                         twait_block->vtag_block[i].lport = lport;
4614                                         twait_block->vtag_block[i].rport = rport;
4615                                         set = 1;
4616                                 }
4617                         }
4618                 }
4619                 if (set) {
4620                         /*
4621                          * We only do up to the block where we can place our
4622                          * tag for audits
4623                          */
4624                         break;
4625                 }
4626         }
4627         /* Need to add a new block to chain */
4628         if (!set) {
4629                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4630                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4631                 if (twait_block == NULL) {
4632                         return;
4633                 }
4634                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4635                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4636                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4637                 twait_block->vtag_block[0].v_tag = tag;
4638                 twait_block->vtag_block[0].lport = lport;
4639                 twait_block->vtag_block[0].rport = rport;
4640         }
4641 }
4642
4643 void
4644 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4645 {
4646         struct sctp_tmit_chunk *chk, *nchk;
4647         struct sctp_queued_to_read *control, *ncontrol;
4648
4649         TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) {
4650                 TAILQ_REMOVE(rh, control, next_instrm);
4651                 control->on_strm_q = 0;
4652                 if (control->on_read_q == 0) {
4653                         sctp_free_remote_addr(control->whoFrom);
4654                         if (control->data) {
4655                                 sctp_m_freem(control->data);
4656                                 control->data = NULL;
4657                         }
4658                 }
4659                 /* Reassembly free? */
4660                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
4661                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
4662                         if (chk->data) {
4663                                 sctp_m_freem(chk->data);
4664                                 chk->data = NULL;
4665                         }
4666                         if (chk->holds_key_ref)
4667                                 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4668                         sctp_free_remote_addr(chk->whoTo);
4669                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4670                         SCTP_DECR_CHK_COUNT();
4671                         /* sa_ignore FREED_MEMORY */
4672                 }
4673                 /*
4674                  * We don't free the address here since all the net's were
4675                  * freed above.
4676                  */
4677                 if (control->on_read_q == 0) {
4678                         sctp_free_a_readq(stcb, control);
4679                 }
4680         }
4681 }
4682
4683
4684 /*-
4685  * Free the association after un-hashing the remote port. This
4686  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4687  * expect that the input to this function IS a locked TCB.
4688  * It will return 0, if it did NOT destroy the association (instead
4689  * it unlocks it. It will return NON-zero if it either destroyed the
4690  * association OR the association is already destroyed.
4691  */
4692 int
4693 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4694 {
4695         int i;
4696         struct sctp_association *asoc;
4697         struct sctp_nets *net, *nnet;
4698         struct sctp_laddr *laddr, *naddr;
4699         struct sctp_tmit_chunk *chk, *nchk;
4700         struct sctp_asconf_addr *aparam, *naparam;
4701         struct sctp_asconf_ack *aack, *naack;
4702         struct sctp_stream_reset_list *strrst, *nstrrst;
4703         struct sctp_queued_to_read *sq, *nsq;
4704         struct sctp_stream_queue_pending *sp, *nsp;
4705         sctp_sharedkey_t *shared_key, *nshared_key;
4706         struct socket *so;
4707
4708         /* first, lets purge the entry from the hash table. */
4709
4710 #ifdef SCTP_LOG_CLOSING
4711         sctp_log_closing(inp, stcb, 6);
4712 #endif
4713         if (stcb->asoc.state == 0) {
4714 #ifdef SCTP_LOG_CLOSING
4715                 sctp_log_closing(inp, NULL, 7);
4716 #endif
4717                 /* there is no asoc, really TSNH :-0 */
4718                 return (1);
4719         }
4720         if (stcb->asoc.alternate) {
4721                 sctp_free_remote_addr(stcb->asoc.alternate);
4722                 stcb->asoc.alternate = NULL;
4723         }
4724         /* TEMP CODE */
4725         if (stcb->freed_from_where == 0) {
4726                 /* Only record the first place free happened from */
4727                 stcb->freed_from_where = from_location;
4728         }
4729         /* TEMP CODE */
4730
4731         asoc = &stcb->asoc;
4732         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4733             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4734                 /* nothing around */
4735                 so = NULL;
4736         else
4737                 so = inp->sctp_socket;
4738
4739         /*
4740          * We used timer based freeing if a reader or writer is in the way.
4741          * So we first check if we are actually being called from a timer,
4742          * if so we abort early if a reader or writer is still in the way.
4743          */
4744         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4745             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4746                 /*
4747                  * is it the timer driving us? if so are the reader/writers
4748                  * gone?
4749                  */
4750                 if (stcb->asoc.refcnt) {
4751                         /* nope, reader or writer in the way */
4752                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4753                         /* no asoc destroyed */
4754                         SCTP_TCB_UNLOCK(stcb);
4755 #ifdef SCTP_LOG_CLOSING
4756                         sctp_log_closing(inp, stcb, 8);
4757 #endif
4758                         return (0);
4759                 }
4760         }
4761         /* Now clean up any other timers */
4762         sctp_stop_association_timers(stcb, false);
4763         /* Now the read queue needs to be cleaned up (only once) */
4764         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4765                 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED);
4766                 SCTP_INP_READ_LOCK(inp);
4767                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4768                         if (sq->stcb == stcb) {
4769                                 sq->do_not_ref_stcb = 1;
4770                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4771                                 /*
4772                                  * If there is no end, there never will be
4773                                  * now.
4774                                  */
4775                                 if (sq->end_added == 0) {
4776                                         /* Held for PD-API clear that. */
4777                                         sq->pdapi_aborted = 1;
4778                                         sq->held_length = 0;
4779                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4780                                                 /*
4781                                                  * Need to add a PD-API
4782                                                  * aborted indication.
4783                                                  * Setting the control_pdapi
4784                                                  * assures that it will be
4785                                                  * added right after this
4786                                                  * msg.
4787                                                  */
4788                                                 uint32_t strseq;
4789
4790                                                 stcb->asoc.control_pdapi = sq;
4791                                                 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff);
4792                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4793                                                     stcb,
4794                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4795                                                     (void *)&strseq,
4796                                                     SCTP_SO_LOCKED);
4797                                                 stcb->asoc.control_pdapi = NULL;
4798                                         }
4799                                 }
4800                                 /* Add an end to wake them */
4801                                 sq->end_added = 1;
4802                         }
4803                 }
4804                 SCTP_INP_READ_UNLOCK(inp);
4805                 if (stcb->block_entry) {
4806                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4807                         stcb->block_entry->error = ECONNRESET;
4808                         stcb->block_entry = NULL;
4809                 }
4810         }
4811         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4812                 /*
4813                  * Someone holds a reference OR the socket is unaccepted
4814                  * yet.
4815                  */
4816                 if ((stcb->asoc.refcnt) ||
4817                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4818                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4819                         SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4820                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4821                 }
4822                 SCTP_TCB_UNLOCK(stcb);
4823                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4824                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4825                         /* nothing around */
4826                         so = NULL;
4827                 if (so) {
4828                         /* Wake any reader/writers */
4829                         sctp_sorwakeup(inp, so);
4830                         sctp_sowwakeup(inp, so);
4831                 }
4832
4833 #ifdef SCTP_LOG_CLOSING
4834                 sctp_log_closing(inp, stcb, 9);
4835 #endif
4836                 /* no asoc destroyed */
4837                 return (0);
4838         }
4839 #ifdef SCTP_LOG_CLOSING
4840         sctp_log_closing(inp, stcb, 10);
4841 #endif
4842         /*
4843          * When I reach here, no others want to kill the assoc yet.. and I
4844          * own the lock. Now its possible an abort comes in when I do the
4845          * lock exchange below to grab all the locks to do the final take
4846          * out. to prevent this we increment the count, which will start a
4847          * timer and blow out above thus assuring us that we hold exclusive
4848          * killing of the asoc. Note that after getting back the TCB lock we
4849          * will go ahead and increment the counter back up and stop any
4850          * timer a passing stranger may have started :-S
4851          */
4852         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4853                 atomic_add_int(&stcb->asoc.refcnt, 1);
4854
4855                 SCTP_TCB_UNLOCK(stcb);
4856                 SCTP_INP_INFO_WLOCK();
4857                 SCTP_INP_WLOCK(inp);
4858                 SCTP_TCB_LOCK(stcb);
4859         }
4860         /* Double check the GONE flag */
4861         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4862             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4863                 /* nothing around */
4864                 so = NULL;
4865
4866         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4867             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4868                 /*
4869                  * For TCP type we need special handling when we are
4870                  * connected. We also include the peel'ed off ones to.
4871                  */
4872                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4873                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4874                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4875                         if (so) {
4876                                 SOCKBUF_LOCK(&so->so_rcv);
4877                                 so->so_state &= ~(SS_ISCONNECTING |
4878                                     SS_ISDISCONNECTING |
4879                                     SS_ISCONFIRMING |
4880                                     SS_ISCONNECTED);
4881                                 so->so_state |= SS_ISDISCONNECTED;
4882                                 socantrcvmore_locked(so);
4883                                 socantsendmore(so);
4884                                 sctp_sowwakeup(inp, so);
4885                                 sctp_sorwakeup(inp, so);
4886                                 SCTP_SOWAKEUP(so);
4887                         }
4888                 }
4889         }
4890
4891         /*
4892          * Make it invalid too, that way if its about to run it will abort
4893          * and return.
4894          */
4895         /* re-increment the lock */
4896         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4897                 atomic_add_int(&stcb->asoc.refcnt, -1);
4898         }
4899         if (stcb->asoc.refcnt) {
4900                 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4901                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4902                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4903                         SCTP_INP_INFO_WUNLOCK();
4904                         SCTP_INP_WUNLOCK(inp);
4905                 }
4906                 SCTP_TCB_UNLOCK(stcb);
4907                 return (0);
4908         }
4909         asoc->state = 0;
4910         if (inp->sctp_tcbhash) {
4911                 LIST_REMOVE(stcb, sctp_tcbhash);
4912         }
4913         if (stcb->asoc.in_asocid_hash) {
4914                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4915         }
4916         /* Now lets remove it from the list of ALL associations in the EP */
4917         LIST_REMOVE(stcb, sctp_tcblist);
4918         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4919                 SCTP_INP_INCR_REF(inp);
4920                 SCTP_INP_WUNLOCK(inp);
4921         }
4922         /* pull from vtag hash */
4923         LIST_REMOVE(stcb, sctp_asocs);
4924         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4925             inp->sctp_lport, stcb->rport);
4926
4927         /*
4928          * Now restop the timers to be sure this is paranoia at is finest!
4929          */
4930         sctp_stop_association_timers(stcb, true);
4931
4932         /*
4933          * The chunk lists and such SHOULD be empty but we check them just
4934          * in case.
4935          */
4936         /* anything on the wheel needs to be removed */
4937         SCTP_TCB_SEND_LOCK(stcb);
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, 1);
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         SCTP_TCB_SEND_UNLOCK(stcb);
4969         /* sa_ignore FREED_MEMORY */
4970         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4971                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4972                 SCTP_FREE(strrst, SCTP_M_STRESET);
4973         }
4974         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4975                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4976                 if (sq->data) {
4977                         sctp_m_freem(sq->data);
4978                         sq->data = NULL;
4979                 }
4980                 sctp_free_remote_addr(sq->whoFrom);
4981                 sq->whoFrom = NULL;
4982                 sq->stcb = NULL;
4983                 /* Free the ctl entry */
4984                 sctp_free_a_readq(stcb, sq);
4985                 /* sa_ignore FREED_MEMORY */
4986         }
4987         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4988                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4989                 if (chk->data) {
4990                         sctp_m_freem(chk->data);
4991                         chk->data = NULL;
4992                 }
4993                 if (chk->holds_key_ref)
4994                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4995                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4996                 SCTP_DECR_CHK_COUNT();
4997                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4998                 asoc->free_chunk_cnt--;
4999                 /* sa_ignore FREED_MEMORY */
5000         }
5001         /* pending send queue SHOULD be empty */
5002         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5003                 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5004                         asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5005 #ifdef INVARIANTS
5006                 } else {
5007                         panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5008 #endif
5009                 }
5010                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5011                 if (chk->data) {
5012                         if (so) {
5013                                 /* Still a socket? */
5014                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5015                                     0, chk, SCTP_SO_LOCKED);
5016                         }
5017                         if (chk->data) {
5018                                 sctp_m_freem(chk->data);
5019                                 chk->data = NULL;
5020                         }
5021                 }
5022                 if (chk->holds_key_ref)
5023                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5024                 if (chk->whoTo) {
5025                         sctp_free_remote_addr(chk->whoTo);
5026                         chk->whoTo = NULL;
5027                 }
5028                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5029                 SCTP_DECR_CHK_COUNT();
5030                 /* sa_ignore FREED_MEMORY */
5031         }
5032         /* sent queue SHOULD be empty */
5033         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5034                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5035                         if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5036                                 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5037 #ifdef INVARIANTS
5038                         } else {
5039                                 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5040 #endif
5041                         }
5042                 }
5043                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5044                 if (chk->data) {
5045                         if (so) {
5046                                 /* Still a socket? */
5047                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5048                                     0, chk, SCTP_SO_LOCKED);
5049                         }
5050                         if (chk->data) {
5051                                 sctp_m_freem(chk->data);
5052                                 chk->data = NULL;
5053                         }
5054                 }
5055                 if (chk->holds_key_ref)
5056                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5057                 sctp_free_remote_addr(chk->whoTo);
5058                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5059                 SCTP_DECR_CHK_COUNT();
5060                 /* sa_ignore FREED_MEMORY */
5061         }
5062 #ifdef INVARIANTS
5063         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5064                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5065                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5066                 }
5067         }
5068 #endif
5069         /* control queue MAY not be empty */
5070         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5071                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5072                 if (chk->data) {
5073                         sctp_m_freem(chk->data);
5074                         chk->data = NULL;
5075                 }
5076                 if (chk->holds_key_ref)
5077                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5078                 sctp_free_remote_addr(chk->whoTo);
5079                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5080                 SCTP_DECR_CHK_COUNT();
5081                 /* sa_ignore FREED_MEMORY */
5082         }
5083         /* ASCONF queue MAY not be empty */
5084         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5085                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5086                 if (chk->data) {
5087                         sctp_m_freem(chk->data);
5088                         chk->data = NULL;
5089                 }
5090                 if (chk->holds_key_ref)
5091                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5092                 sctp_free_remote_addr(chk->whoTo);
5093                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5094                 SCTP_DECR_CHK_COUNT();
5095                 /* sa_ignore FREED_MEMORY */
5096         }
5097         if (asoc->mapping_array) {
5098                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5099                 asoc->mapping_array = NULL;
5100         }
5101         if (asoc->nr_mapping_array) {
5102                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5103                 asoc->nr_mapping_array = NULL;
5104         }
5105         /* the stream outs */
5106         if (asoc->strmout) {
5107                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5108                 asoc->strmout = NULL;
5109         }
5110         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5111         if (asoc->strmin) {
5112                 for (i = 0; i < asoc->streamincnt; i++) {
5113                         sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5114                         sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5115                 }
5116                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5117                 asoc->strmin = NULL;
5118         }
5119         asoc->streamincnt = 0;
5120         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5121 #ifdef INVARIANTS
5122                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5123                         panic("no net's left alloc'ed, or list points to itself");
5124                 }
5125 #endif
5126                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5127                 sctp_free_remote_addr(net);
5128         }
5129         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5130                 /* sa_ignore FREED_MEMORY */
5131                 sctp_remove_laddr(laddr);
5132         }
5133
5134         /* pending asconf (address) parameters */
5135         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5136                 /* sa_ignore FREED_MEMORY */
5137                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5138                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5139         }
5140         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5141                 /* sa_ignore FREED_MEMORY */
5142                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5143                 if (aack->data != NULL) {
5144                         sctp_m_freem(aack->data);
5145                 }
5146                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5147         }
5148         /* clean up auth stuff */
5149         if (asoc->local_hmacs)
5150                 sctp_free_hmaclist(asoc->local_hmacs);
5151         if (asoc->peer_hmacs)
5152                 sctp_free_hmaclist(asoc->peer_hmacs);
5153
5154         if (asoc->local_auth_chunks)
5155                 sctp_free_chunklist(asoc->local_auth_chunks);
5156         if (asoc->peer_auth_chunks)
5157                 sctp_free_chunklist(asoc->peer_auth_chunks);
5158
5159         sctp_free_authinfo(&asoc->authinfo);
5160
5161         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5162                 LIST_REMOVE(shared_key, next);
5163                 sctp_free_sharedkey(shared_key);
5164                 /* sa_ignore FREED_MEMORY */
5165         }
5166
5167         /* Insert new items here :> */
5168
5169         /* Get rid of LOCK */
5170         SCTP_TCB_UNLOCK(stcb);
5171         SCTP_TCB_LOCK_DESTROY(stcb);
5172         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5173         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5174                 SCTP_INP_INFO_WUNLOCK();
5175                 SCTP_INP_RLOCK(inp);
5176         }
5177 #ifdef SCTP_TRACK_FREED_ASOCS
5178         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5179                 /* now clean up the tasoc itself */
5180                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5181                 SCTP_DECR_ASOC_COUNT();
5182         } else {
5183                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5184         }
5185 #else
5186         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5187         SCTP_DECR_ASOC_COUNT();
5188 #endif
5189         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5190                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5191                         /*
5192                          * If its NOT the inp_free calling us AND sctp_close
5193                          * as been called, we call back...
5194                          */
5195                         SCTP_INP_RUNLOCK(inp);
5196                         /*
5197                          * This will start the kill timer (if we are the
5198                          * last one) since we hold an increment yet. But
5199                          * this is the only safe way to do this since
5200                          * otherwise if the socket closes at the same time
5201                          * we are here we might collide in the cleanup.
5202                          */
5203                         sctp_inpcb_free(inp,
5204                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5205                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5206                         SCTP_INP_DECR_REF(inp);
5207                 } else {
5208                         /* The socket is still open. */
5209                         SCTP_INP_DECR_REF(inp);
5210                         SCTP_INP_RUNLOCK(inp);
5211                 }
5212         }
5213         /* destroyed the asoc */
5214 #ifdef SCTP_LOG_CLOSING
5215         sctp_log_closing(inp, NULL, 11);
5216 #endif
5217         return (1);
5218 }
5219
5220
5221
5222 /*
5223  * determine if a destination is "reachable" based upon the addresses bound
5224  * to the current endpoint (e.g. only v4 or v6 currently bound)
5225  */
5226 /*
5227  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5228  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5229  * types bound as its endpoint
5230  */
5231 int
5232 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5233 {
5234         struct sctp_inpcb *inp;
5235         int answer;
5236
5237         /*
5238          * No locks here, the TCB, in all cases is already locked and an
5239          * assoc is up. There is either a INP lock by the caller applied (in
5240          * asconf case when deleting an address) or NOT in the HB case,
5241          * however if HB then the INP increment is up and the INP will not
5242          * be removed (on top of the fact that we have a TCB lock). So we
5243          * only want to read the sctp_flags, which is either bound-all or
5244          * not.. no protection needed since once an assoc is up you can't be
5245          * changing your binding.
5246          */
5247         inp = stcb->sctp_ep;
5248         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5249                 /* if bound all, destination is not restricted */
5250                 /*
5251                  * RRS: Question during lock work: Is this correct? If you
5252                  * are bound-all you still might need to obey the V4--V6
5253                  * flags??? IMO this bound-all stuff needs to be removed!
5254                  */
5255                 return (1);
5256         }
5257         /* NOTE: all "scope" checks are done when local addresses are added */
5258         switch (destaddr->sa_family) {
5259 #ifdef INET6
5260         case AF_INET6:
5261                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5262                 break;
5263 #endif
5264 #ifdef INET
5265         case AF_INET:
5266                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5267                 break;
5268 #endif
5269         default:
5270                 /* invalid family, so it's unreachable */
5271                 answer = 0;
5272                 break;
5273         }
5274         return (answer);
5275 }
5276
5277 /*
5278  * update the inp_vflags on an endpoint
5279  */
5280 static void
5281 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5282 {
5283         struct sctp_laddr *laddr;
5284
5285         /* first clear the flag */
5286         inp->ip_inp.inp.inp_vflag = 0;
5287         /* set the flag based on addresses on the ep list */
5288         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5289                 if (laddr->ifa == NULL) {
5290                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5291                             __func__);
5292                         continue;
5293                 }
5294
5295                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5296                         continue;
5297                 }
5298                 switch (laddr->ifa->address.sa.sa_family) {
5299 #ifdef INET6
5300                 case AF_INET6:
5301                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5302                         break;
5303 #endif
5304 #ifdef INET
5305                 case AF_INET:
5306                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5307                         break;
5308 #endif
5309                 default:
5310                         break;
5311                 }
5312         }
5313 }
5314
5315 /*
5316  * Add the address to the endpoint local address list There is nothing to be
5317  * done if we are bound to all addresses
5318  */
5319 void
5320 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5321 {
5322         struct sctp_laddr *laddr;
5323         struct sctp_tcb *stcb;
5324         int fnd, error = 0;
5325
5326         fnd = 0;
5327
5328         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5329                 /* You are already bound to all. You have it already */
5330                 return;
5331         }
5332 #ifdef INET6
5333         if (ifa->address.sa.sa_family == AF_INET6) {
5334                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5335                         /* Can't bind a non-useable addr. */
5336                         return;
5337                 }
5338         }
5339 #endif
5340         /* first, is it already present? */
5341         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5342                 if (laddr->ifa == ifa) {
5343                         fnd = 1;
5344                         break;
5345                 }
5346         }
5347
5348         if (fnd == 0) {
5349                 /* Not in the ep list */
5350                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5351                 if (error != 0)
5352                         return;
5353                 inp->laddr_count++;
5354                 /* update inp_vflag flags */
5355                 switch (ifa->address.sa.sa_family) {
5356 #ifdef INET6
5357                 case AF_INET6:
5358                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5359                         break;
5360 #endif
5361 #ifdef INET
5362                 case AF_INET:
5363                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5364                         break;
5365 #endif
5366                 default:
5367                         break;
5368                 }
5369                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5370                         sctp_add_local_addr_restricted(stcb, ifa);
5371                 }
5372         }
5373         return;
5374 }
5375
5376
5377 /*
5378  * select a new (hopefully reachable) destination net (should only be used
5379  * when we deleted an ep addr that is the only usable source address to reach
5380  * the destination net)
5381  */
5382 static void
5383 sctp_select_primary_destination(struct sctp_tcb *stcb)
5384 {
5385         struct sctp_nets *net;
5386
5387         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5388                 /* for now, we'll just pick the first reachable one we find */
5389                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5390                         continue;
5391                 if (sctp_destination_is_reachable(stcb,
5392                     (struct sockaddr *)&net->ro._l_addr)) {
5393                         /* found a reachable destination */
5394                         stcb->asoc.primary_destination = net;
5395                 }
5396         }
5397         /* I can't there from here! ...we're gonna die shortly... */
5398 }
5399
5400
5401 /*
5402  * Delete the address from the endpoint local address list. There is nothing
5403  * to be done if we are bound to all addresses
5404  */
5405 void
5406 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5407 {
5408         struct sctp_laddr *laddr;
5409         int fnd;
5410
5411         fnd = 0;
5412         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5413                 /* You are already bound to all. You have it already */
5414                 return;
5415         }
5416         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5417                 if (laddr->ifa == ifa) {
5418                         fnd = 1;
5419                         break;
5420                 }
5421         }
5422         if (fnd && (inp->laddr_count < 2)) {
5423                 /* can't delete unless there are at LEAST 2 addresses */
5424                 return;
5425         }
5426         if (fnd) {
5427                 /*
5428                  * clean up any use of this address go through our
5429                  * associations and clear any last_used_address that match
5430                  * this one for each assoc, see if a new primary_destination
5431                  * is needed
5432                  */
5433                 struct sctp_tcb *stcb;
5434
5435                 /* clean up "next_addr_touse" */
5436                 if (inp->next_addr_touse == laddr)
5437                         /* delete this address */
5438                         inp->next_addr_touse = NULL;
5439
5440                 /* clean up "last_used_address" */
5441                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5442                         struct sctp_nets *net;
5443
5444                         SCTP_TCB_LOCK(stcb);
5445                         if (stcb->asoc.last_used_address == laddr)
5446                                 /* delete this address */
5447                                 stcb->asoc.last_used_address = NULL;
5448                         /*
5449                          * Now spin through all the nets and purge any ref
5450                          * to laddr
5451                          */
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
5709         /* Now start them all */
5710         CPU_FOREACH(cpu) {
5711                 (void)kproc_create(sctp_mcore_thread,
5712                     (void *)&sctp_mcore_workers[cpu],
5713                     &sctp_mcore_workers[cpu].thread_proc,
5714                     RFPROC,
5715                     SCTP_KTHREAD_PAGES,
5716                     SCTP_MCORE_NAME);
5717
5718         }
5719 }
5720 #endif
5721
5722 void
5723 sctp_pcb_init(void)
5724 {
5725         /*
5726          * SCTP initialization for the PCB structures should be called by
5727          * the sctp_init() function.
5728          */
5729         int i;
5730         struct timeval tv;
5731
5732         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5733                 /* error I was called twice */
5734                 return;
5735         }
5736         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5737
5738 #if defined(SCTP_LOCAL_TRACE_BUF)
5739         memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log));
5740 #endif
5741 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5742         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5743             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5744             SCTP_M_MCORE);
5745 #endif
5746         (void)SCTP_GETTIME_TIMEVAL(&tv);
5747 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5748         memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1));
5749         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
5750         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
5751 #else
5752         memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat));
5753         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
5754         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
5755 #endif
5756         /* init the empty list of (All) Endpoints */
5757         LIST_INIT(&SCTP_BASE_INFO(listhead));
5758
5759
5760         /* init the hash table of endpoints */
5761         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5762         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5763         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5764         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5765             &SCTP_BASE_INFO(hashasocmark));
5766         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5767             &SCTP_BASE_INFO(hashmark));
5768         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5769             &SCTP_BASE_INFO(hashtcpmark));
5770         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5771
5772
5773         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5774             &SCTP_BASE_INFO(hashvrfmark));
5775
5776         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5777             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5778         /* init the zones */
5779         /*
5780          * FIX ME: Should check for NULL returns, but if it does fail we are
5781          * doomed to panic anyways... add later maybe.
5782          */
5783         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5784             sizeof(struct sctp_inpcb), maxsockets);
5785
5786         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5787             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5788
5789         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5790             sizeof(struct sctp_laddr),
5791             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5792
5793         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5794             sizeof(struct sctp_nets),
5795             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5796
5797         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5798             sizeof(struct sctp_tmit_chunk),
5799             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5800
5801         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5802             sizeof(struct sctp_queued_to_read),
5803             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5804
5805         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5806             sizeof(struct sctp_stream_queue_pending),
5807             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5808
5809         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5810             sizeof(struct sctp_asconf),
5811             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5812
5813         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5814             sizeof(struct sctp_asconf_ack),
5815             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5816
5817
5818         /* Master Lock INIT for info structure */
5819         SCTP_INP_INFO_LOCK_INIT();
5820         SCTP_STATLOG_INIT_LOCK();
5821
5822         SCTP_IPI_COUNT_INIT();
5823         SCTP_IPI_ADDR_INIT();
5824 #ifdef SCTP_PACKET_LOGGING
5825         SCTP_IP_PKTLOG_INIT();
5826 #endif
5827         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5828
5829         SCTP_WQ_ADDR_INIT();
5830         /* not sure if we need all the counts */
5831         SCTP_BASE_INFO(ipi_count_ep) = 0;
5832         /* assoc/tcb zone info */
5833         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5834         /* local addrlist zone info */
5835         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5836         /* remote addrlist zone info */
5837         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5838         /* chunk info */
5839         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5840
5841         /* socket queue zone info */
5842         SCTP_BASE_INFO(ipi_count_readq) = 0;
5843
5844         /* stream out queue cont */
5845         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5846
5847         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5848         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5849
5850         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5851
5852         /* Init the TIMEWAIT list */
5853         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5854                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5855         }
5856         sctp_startup_iterator();
5857
5858 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5859         sctp_startup_mcore_threads();
5860 #endif
5861
5862         /*
5863          * INIT the default VRF which for BSD is the only one, other O/S's
5864          * may have more. But initially they must start with one and then
5865          * add the VRF's as addresses are added.
5866          */
5867         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5868 }
5869
5870 /*
5871  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5872  */
5873 void
5874 sctp_pcb_finish(void)
5875 {
5876         struct sctp_vrflist *vrf_bucket;
5877         struct sctp_vrf *vrf, *nvrf;
5878         struct sctp_ifn *ifn, *nifn;
5879         struct sctp_ifa *ifa, *nifa;
5880         struct sctpvtaghead *chain;
5881         struct sctp_tagblock *twait_block, *prev_twait_block;
5882         struct sctp_laddr *wi, *nwi;
5883         int i;
5884         struct sctp_iterator *it, *nit;
5885
5886         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5887                 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5888                 return;
5889         }
5890         SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5891         /*
5892          * In FreeBSD the iterator thread never exits but we do clean up.
5893          * The only way FreeBSD reaches here is if we have VRF's but we
5894          * still add the ifdef to make it compile on old versions.
5895          */
5896 retry:
5897         SCTP_IPI_ITERATOR_WQ_LOCK();
5898         /*
5899          * sctp_iterator_worker() might be working on an it entry without
5900          * holding the lock.  We won't find it on the list either and
5901          * continue and free/destroy it.  While holding the lock, spin, to
5902          * avoid the race condition as sctp_iterator_worker() will have to
5903          * wait to re-aquire the lock.
5904          */
5905         if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5906                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5907                 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5908                     "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5909                 DELAY(10);
5910                 goto retry;
5911         }
5912         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5913                 if (it->vn != curvnet) {
5914                         continue;
5915                 }
5916                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5917                 if (it->function_atend != NULL) {
5918                         (*it->function_atend) (it->pointer, it->val);
5919                 }
5920                 SCTP_FREE(it, SCTP_M_ITER);
5921         }
5922         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5923         SCTP_ITERATOR_LOCK();
5924         if ((sctp_it_ctl.cur_it) &&
5925             (sctp_it_ctl.cur_it->vn == curvnet)) {
5926                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5927         }
5928         SCTP_ITERATOR_UNLOCK();
5929         SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5930         SCTP_WQ_ADDR_LOCK();
5931         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5932                 LIST_REMOVE(wi, sctp_nxt_addr);
5933                 SCTP_DECR_LADDR_COUNT();
5934                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5935                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
5936                 }
5937                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5938         }
5939         SCTP_WQ_ADDR_UNLOCK();
5940
5941         /*
5942          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5943          * destroyed first).
5944          */
5945         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5946         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5947                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5948                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5949                                 /* free the ifa */
5950                                 LIST_REMOVE(ifa, next_bucket);
5951                                 LIST_REMOVE(ifa, next_ifa);
5952                                 SCTP_FREE(ifa, SCTP_M_IFA);
5953                         }
5954                         /* free the ifn */
5955                         LIST_REMOVE(ifn, next_bucket);
5956                         LIST_REMOVE(ifn, next_ifn);
5957                         SCTP_FREE(ifn, SCTP_M_IFN);
5958                 }
5959                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5960                 /* free the vrf */
5961                 LIST_REMOVE(vrf, next_vrf);
5962                 SCTP_FREE(vrf, SCTP_M_VRF);
5963         }
5964         /* free the vrf hashes */
5965         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5966         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5967
5968         /*
5969          * free the TIMEWAIT list elements malloc'd in the function
5970          * sctp_add_vtag_to_timewait()...
5971          */
5972         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5973                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5974                 if (!LIST_EMPTY(chain)) {
5975                         prev_twait_block = NULL;
5976                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5977                                 if (prev_twait_block) {
5978                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5979                                 }
5980                                 prev_twait_block = twait_block;
5981                         }
5982                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5983                 }
5984         }
5985
5986         /* free the locks and mutexes */
5987 #ifdef SCTP_PACKET_LOGGING
5988         SCTP_IP_PKTLOG_DESTROY();
5989 #endif
5990         SCTP_IPI_ADDR_DESTROY();
5991         SCTP_STATLOG_DESTROY();
5992         SCTP_INP_INFO_LOCK_DESTROY();
5993
5994         SCTP_WQ_ADDR_DESTROY();
5995
5996         /* Get rid of other stuff too. */
5997         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5998                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5999         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6000                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6001         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6002                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6003
6004         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6005         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6006         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6007         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6008         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6009         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6010         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6011         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6012         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6013 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6014         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6015 #endif
6016 }
6017
6018
6019 int
6020 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6021     int offset, int limit,
6022     struct sockaddr *src, struct sockaddr *dst,
6023     struct sockaddr *altsa, uint16_t port)
6024 {
6025         /*
6026          * grub through the INIT pulling addresses and loading them to the
6027          * nets structure in the asoc. The from address in the mbuf should
6028          * also be loaded (if it is not already). This routine can be called
6029          * with either INIT or INIT-ACK's as long as the m points to the IP
6030          * packet and the offset points to the beginning of the parameters.
6031          */
6032         struct sctp_inpcb *inp;
6033         struct sctp_nets *net, *nnet, *net_tmp;
6034         struct sctp_paramhdr *phdr, param_buf;
6035         struct sctp_tcb *stcb_tmp;
6036         uint16_t ptype, plen;
6037         struct sockaddr *sa;
6038         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6039         struct sctp_auth_random *p_random = NULL;
6040         uint16_t random_len = 0;
6041         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6042         struct sctp_auth_hmac_algo *hmacs = NULL;
6043         uint16_t hmacs_len = 0;
6044         uint8_t saw_asconf = 0;
6045         uint8_t saw_asconf_ack = 0;
6046         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6047         struct sctp_auth_chunk_list *chunks = NULL;
6048         uint16_t num_chunks = 0;
6049         sctp_key_t *new_key;
6050         uint32_t keylen;
6051         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6052         uint8_t peer_supports_ecn;
6053         uint8_t peer_supports_prsctp;
6054         uint8_t peer_supports_auth;
6055         uint8_t peer_supports_asconf;
6056         uint8_t peer_supports_asconf_ack;
6057         uint8_t peer_supports_reconfig;
6058         uint8_t peer_supports_nrsack;
6059         uint8_t peer_supports_pktdrop;
6060         uint8_t peer_supports_idata;
6061 #ifdef INET
6062         struct sockaddr_in sin;
6063 #endif
6064 #ifdef INET6
6065         struct sockaddr_in6 sin6;
6066 #endif
6067
6068         /* First get the destination address setup too. */
6069 #ifdef INET
6070         memset(&sin, 0, sizeof(sin));
6071         sin.sin_family = AF_INET;
6072         sin.sin_len = sizeof(sin);
6073         sin.sin_port = stcb->rport;
6074 #endif
6075 #ifdef INET6
6076         memset(&sin6, 0, sizeof(sin6));
6077         sin6.sin6_family = AF_INET6;
6078         sin6.sin6_len = sizeof(struct sockaddr_in6);
6079         sin6.sin6_port = stcb->rport;
6080 #endif
6081         if (altsa) {
6082                 sa = altsa;
6083         } else {
6084                 sa = src;
6085         }
6086         peer_supports_idata = 0;
6087         peer_supports_ecn = 0;
6088         peer_supports_prsctp = 0;
6089         peer_supports_auth = 0;
6090         peer_supports_asconf = 0;
6091         peer_supports_reconfig = 0;
6092         peer_supports_nrsack = 0;
6093         peer_supports_pktdrop = 0;
6094         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6095                 /* mark all addresses that we have currently on the list */
6096                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6097         }
6098         /* does the source address already exist? if so skip it */
6099         inp = stcb->sctp_ep;
6100         atomic_add_int(&stcb->asoc.refcnt, 1);
6101         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6102         atomic_add_int(&stcb->asoc.refcnt, -1);
6103
6104         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6105                 /* we must add the source address */
6106                 /* no scope set here since we have a tcb already. */
6107                 switch (sa->sa_family) {
6108 #ifdef INET
6109                 case AF_INET:
6110                         if (stcb->asoc.scope.ipv4_addr_legal) {
6111                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6112                                         return (-1);
6113                                 }
6114                         }
6115                         break;
6116 #endif
6117 #ifdef INET6
6118                 case AF_INET6:
6119                         if (stcb->asoc.scope.ipv6_addr_legal) {
6120                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6121                                         return (-2);
6122                                 }
6123                         }
6124                         break;
6125 #endif
6126                 default:
6127                         break;
6128                 }
6129         } else {
6130                 if (net_tmp != NULL && stcb_tmp == stcb) {
6131                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6132                 } else if (stcb_tmp != stcb) {
6133                         /* It belongs to another association? */
6134                         if (stcb_tmp)
6135                                 SCTP_TCB_UNLOCK(stcb_tmp);
6136                         return (-3);
6137                 }
6138         }
6139         if (stcb->asoc.state == 0) {
6140                 /* the assoc was freed? */
6141                 return (-4);
6142         }
6143         /* now we must go through each of the params. */
6144         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
6145         while (phdr) {
6146                 ptype = ntohs(phdr->param_type);
6147                 plen = ntohs(phdr->param_length);
6148                 /*
6149                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6150                  * (uint32_t)ptype, (int)plen);
6151                  */
6152                 if (offset + plen > limit) {
6153                         break;
6154                 }
6155                 if (plen < sizeof(struct sctp_paramhdr)) {
6156                         break;
6157                 }
6158 #ifdef INET
6159                 if (ptype == SCTP_IPV4_ADDRESS) {
6160                         if (stcb->asoc.scope.ipv4_addr_legal) {
6161                                 struct sctp_ipv4addr_param *p4, p4_buf;
6162
6163                                 /* ok get the v4 address and check/add */
6164                                 phdr = sctp_get_next_param(m, offset,
6165                                     (struct sctp_paramhdr *)&p4_buf,
6166                                     sizeof(p4_buf));
6167                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6168                                     phdr == NULL) {
6169                                         return (-5);
6170                                 }
6171                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6172                                 sin.sin_addr.s_addr = p4->addr;
6173                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6174                                         /* Skip multi-cast addresses */
6175                                         goto next_param;
6176                                 }
6177                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6178                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6179                                         goto next_param;
6180                                 }
6181                                 sa = (struct sockaddr *)&sin;
6182                                 inp = stcb->sctp_ep;
6183                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6184                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6185                                     dst, stcb);
6186                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6187
6188                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6189                                     inp == NULL) {
6190                                         /* we must add the source address */
6191                                         /*
6192                                          * no scope set since we have a tcb
6193                                          * already
6194                                          */
6195
6196                                         /*
6197                                          * we must validate the state again
6198                                          * here
6199                                          */
6200                         add_it_now:
6201                                         if (stcb->asoc.state == 0) {
6202                                                 /* the assoc was freed? */
6203                                                 return (-7);
6204                                         }
6205                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6206                                                 return (-8);
6207                                         }
6208                                 } else if (stcb_tmp == stcb) {
6209                                         if (stcb->asoc.state == 0) {
6210                                                 /* the assoc was freed? */
6211                                                 return (-10);
6212                                         }
6213                                         if (net != NULL) {
6214                                                 /* clear flag */
6215                                                 net->dest_state &=
6216                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6217                                         }
6218                                 } else {
6219                                         /*
6220                                          * strange, address is in another
6221                                          * assoc? straighten out locks.
6222                                          */
6223                                         if (stcb_tmp) {
6224                                                 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6225                                                         struct mbuf *op_err;
6226                                                         char msg[SCTP_DIAG_INFO_LEN];
6227
6228                                                         /*
6229                                                          * in setup state we
6230                                                          * abort this guy
6231                                                          */
6232                                                         snprintf(msg, sizeof(msg),
6233                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6234                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6235                                                             msg);
6236                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6237                                                             stcb_tmp, op_err,
6238                                                             SCTP_SO_NOT_LOCKED);
6239                                                         goto add_it_now;
6240                                                 }
6241                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6242                                         }
6243
6244                                         if (stcb->asoc.state == 0) {
6245                                                 /* the assoc was freed? */
6246                                                 return (-12);
6247                                         }
6248                                         return (-13);
6249                                 }
6250                         }
6251                 } else
6252 #endif
6253 #ifdef INET6
6254                 if (ptype == SCTP_IPV6_ADDRESS) {
6255                         if (stcb->asoc.scope.ipv6_addr_legal) {
6256                                 /* ok get the v6 address and check/add */
6257                                 struct sctp_ipv6addr_param *p6, p6_buf;
6258
6259                                 phdr = sctp_get_next_param(m, offset,
6260                                     (struct sctp_paramhdr *)&p6_buf,
6261                                     sizeof(p6_buf));
6262                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6263                                     phdr == NULL) {
6264                                         return (-14);
6265                                 }
6266                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6267                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6268                                     sizeof(p6->addr));
6269                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6270                                         /* Skip multi-cast addresses */
6271                                         goto next_param;
6272                                 }
6273                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6274                                         /*
6275                                          * Link local make no sense without
6276                                          * scope
6277                                          */
6278                                         goto next_param;
6279                                 }
6280                                 sa = (struct sockaddr *)&sin6;
6281                                 inp = stcb->sctp_ep;
6282                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6283                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6284                                     dst, stcb);
6285                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6286                                 if (stcb_tmp == NULL &&
6287                                     (inp == stcb->sctp_ep || inp == NULL)) {
6288                                         /*
6289                                          * we must validate the state again
6290                                          * here
6291                                          */
6292                         add_it_now6:
6293                                         if (stcb->asoc.state == 0) {
6294                                                 /* the assoc was freed? */
6295                                                 return (-16);
6296                                         }
6297                                         /*
6298                                          * we must add the address, no scope
6299                                          * set
6300                                          */
6301                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6302                                                 return (-17);
6303                                         }
6304                                 } else if (stcb_tmp == stcb) {
6305                                         /*
6306                                          * we must validate the state again
6307                                          * here
6308                                          */
6309                                         if (stcb->asoc.state == 0) {
6310                                                 /* the assoc was freed? */
6311                                                 return (-19);
6312                                         }
6313                                         if (net != NULL) {
6314                                                 /* clear flag */
6315                                                 net->dest_state &=
6316                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6317                                         }
6318                                 } else {
6319                                         /*
6320                                          * strange, address is in another
6321                                          * assoc? straighten out locks.
6322                                          */
6323                                         if (stcb_tmp) {
6324                                                 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6325                                                         struct mbuf *op_err;
6326                                                         char msg[SCTP_DIAG_INFO_LEN];
6327
6328                                                         /*
6329                                                          * in setup state we
6330                                                          * abort this guy
6331                                                          */
6332                                                         snprintf(msg, sizeof(msg),
6333                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6334                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6335                                                             msg);
6336                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6337                                                             stcb_tmp, op_err,
6338                                                             SCTP_SO_NOT_LOCKED);
6339                                                         goto add_it_now6;
6340                                                 }
6341                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6342                                         }
6343                                         if (stcb->asoc.state == 0) {
6344                                                 /* the assoc was freed? */
6345                                                 return (-21);
6346                                         }
6347                                         return (-22);
6348                                 }
6349                         }
6350                 } else
6351 #endif
6352                 if (ptype == SCTP_ECN_CAPABLE) {
6353                         peer_supports_ecn = 1;
6354                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6355                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6356                                 struct sctp_adaptation_layer_indication ai,
6357                                                                 *aip;
6358
6359                                 phdr = sctp_get_next_param(m, offset,
6360                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6361                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6362                                 if (aip) {
6363                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6364                                         stcb->asoc.adaptation_needed = 1;
6365                                 }
6366                         }
6367                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6368                         struct sctp_asconf_addr_param lstore, *fee;
6369                         int lptype;
6370                         struct sockaddr *lsa = NULL;
6371 #ifdef INET
6372                         struct sctp_asconf_addrv4_param *fii;
6373 #endif
6374
6375                         if (stcb->asoc.asconf_supported == 0) {
6376                                 return (-100);
6377                         }
6378                         if (plen > sizeof(lstore)) {
6379                                 return (-23);
6380                         }
6381                         if (plen < sizeof(struct sctp_asconf_addrv4_param)) {
6382                                 return (-101);
6383                         }
6384                         phdr = sctp_get_next_param(m, offset,
6385                             (struct sctp_paramhdr *)&lstore,
6386                             plen);
6387                         if (phdr == NULL) {
6388                                 return (-24);
6389                         }
6390                         fee = (struct sctp_asconf_addr_param *)phdr;
6391                         lptype = ntohs(fee->addrp.ph.param_type);
6392                         switch (lptype) {
6393 #ifdef INET
6394                         case SCTP_IPV4_ADDRESS:
6395                                 if (plen !=
6396                                     sizeof(struct sctp_asconf_addrv4_param)) {
6397                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6398                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6399                                             plen);
6400                                 } else {
6401                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6402                                         sin.sin_addr.s_addr = fii->addrp.addr;
6403                                         lsa = (struct sockaddr *)&sin;
6404                                 }
6405                                 break;
6406 #endif
6407 #ifdef INET6
6408                         case SCTP_IPV6_ADDRESS:
6409                                 if (plen !=
6410                                     sizeof(struct sctp_asconf_addr_param)) {
6411                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6412                                             (int)sizeof(struct sctp_asconf_addr_param),
6413                                             plen);
6414                                 } else {
6415                                         memcpy(sin6.sin6_addr.s6_addr,
6416                                             fee->addrp.addr,
6417                                             sizeof(fee->addrp.addr));
6418                                         lsa = (struct sockaddr *)&sin6;
6419                                 }
6420                                 break;
6421 #endif
6422                         default:
6423                                 break;
6424                         }
6425                         if (lsa) {
6426                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6427                         }
6428                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6429                         stcb->asoc.peer_supports_nat = 1;
6430                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6431                         /* Peer supports pr-sctp */
6432                         peer_supports_prsctp = 1;
6433                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6434                         /* A supported extension chunk */
6435                         struct sctp_supported_chunk_types_param *pr_supported;
6436                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6437                         int num_ent, i;
6438
6439                         if (plen > sizeof(local_store)) {
6440                                 return (-35);
6441                         }
6442                         phdr = sctp_get_next_param(m, offset,
6443                             (struct sctp_paramhdr *)&local_store, plen);
6444                         if (phdr == NULL) {
6445                                 return (-25);
6446                         }
6447                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6448                         num_ent = plen - sizeof(struct sctp_paramhdr);
6449                         for (i = 0; i < num_ent; i++) {
6450                                 switch (pr_supported->chunk_types[i]) {
6451                                 case SCTP_ASCONF:
6452                                         peer_supports_asconf = 1;
6453                                         break;
6454                                 case SCTP_ASCONF_ACK:
6455                                         peer_supports_asconf_ack = 1;
6456                                         break;
6457                                 case SCTP_FORWARD_CUM_TSN:
6458                                         peer_supports_prsctp = 1;
6459                                         break;
6460                                 case SCTP_PACKET_DROPPED:
6461                                         peer_supports_pktdrop = 1;
6462                                         break;
6463                                 case SCTP_NR_SELECTIVE_ACK:
6464                                         peer_supports_nrsack = 1;
6465                                         break;
6466                                 case SCTP_STREAM_RESET:
6467                                         peer_supports_reconfig = 1;
6468                                         break;
6469                                 case SCTP_AUTHENTICATION:
6470                                         peer_supports_auth = 1;
6471                                         break;
6472                                 case SCTP_IDATA:
6473                                         peer_supports_idata = 1;
6474                                         break;
6475                                 default:
6476                                         /* one I have not learned yet */
6477                                         break;
6478
6479                                 }
6480                         }
6481                 } else if (ptype == SCTP_RANDOM) {
6482                         if (plen > sizeof(random_store))
6483                                 break;
6484                         if (got_random) {
6485                                 /* already processed a RANDOM */
6486                                 goto next_param;
6487                         }
6488                         phdr = sctp_get_next_param(m, offset,
6489                             (struct sctp_paramhdr *)random_store,
6490                             plen);
6491                         if (phdr == NULL)
6492                                 return (-26);
6493                         p_random = (struct sctp_auth_random *)phdr;
6494                         random_len = plen - sizeof(*p_random);
6495                         /* enforce the random length */
6496                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6497                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6498                                 return (-27);
6499                         }
6500                         got_random = 1;
6501                 } else if (ptype == SCTP_HMAC_LIST) {
6502                         uint16_t num_hmacs;
6503                         uint16_t i;
6504
6505                         if (plen > sizeof(hmacs_store))
6506                                 break;
6507                         if (got_hmacs) {
6508                                 /* already processed a HMAC list */
6509                                 goto next_param;
6510                         }
6511                         phdr = sctp_get_next_param(m, offset,
6512                             (struct sctp_paramhdr *)hmacs_store,
6513                             plen);
6514                         if (phdr == NULL)
6515                                 return (-28);
6516                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6517                         hmacs_len = plen - sizeof(*hmacs);
6518                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6519                         /* validate the hmac list */
6520                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6521                                 return (-29);
6522                         }
6523                         if (stcb->asoc.peer_hmacs != NULL)
6524                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6525                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6526                         if (stcb->asoc.peer_hmacs != NULL) {
6527                                 for (i = 0; i < num_hmacs; i++) {
6528                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6529                                             ntohs(hmacs->hmac_ids[i]));
6530                                 }
6531                         }
6532                         got_hmacs = 1;
6533                 } else if (ptype == SCTP_CHUNK_LIST) {
6534                         int i;
6535
6536                         if (plen > sizeof(chunks_store))
6537                                 break;
6538                         if (got_chklist) {
6539                                 /* already processed a Chunks list */
6540                                 goto next_param;
6541                         }
6542                         phdr = sctp_get_next_param(m, offset,
6543                             (struct sctp_paramhdr *)chunks_store,
6544                             plen);
6545                         if (phdr == NULL)
6546                                 return (-30);
6547                         chunks = (struct sctp_auth_chunk_list *)phdr;
6548                         num_chunks = plen - sizeof(*chunks);
6549                         if (stcb->asoc.peer_auth_chunks != NULL)
6550                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6551                         else
6552                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6553                         for (i = 0; i < num_chunks; i++) {
6554                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6555                                     stcb->asoc.peer_auth_chunks);
6556                                 /* record asconf/asconf-ack if listed */
6557                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6558                                         saw_asconf = 1;
6559                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6560                                         saw_asconf_ack = 1;
6561
6562                         }
6563                         got_chklist = 1;
6564                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6565                             (ptype == SCTP_STATE_COOKIE) ||
6566                             (ptype == SCTP_UNRECOG_PARAM) ||
6567                             (ptype == SCTP_COOKIE_PRESERVE) ||
6568                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6569                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6570                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6571                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6572                     (ptype == SCTP_SUCCESS_REPORT)) {
6573                          /* don't care */ ;
6574                 } else {
6575                         if ((ptype & 0x8000) == 0x0000) {
6576                                 /*
6577                                  * must stop processing the rest of the
6578                                  * param's. Any report bits were handled
6579                                  * with the call to
6580                                  * sctp_arethere_unrecognized_parameters()
6581                                  * when the INIT or INIT-ACK was first seen.
6582                                  */
6583                                 break;
6584                         }
6585                 }
6586
6587 next_param:
6588                 offset += SCTP_SIZE32(plen);
6589                 if (offset >= limit) {
6590                         break;
6591                 }
6592                 phdr = sctp_get_next_param(m, offset, &param_buf,
6593                     sizeof(param_buf));
6594         }
6595         /* Now check to see if we need to purge any addresses */
6596         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6597                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6598                     SCTP_ADDR_NOT_IN_ASSOC) {
6599                         /* This address has been removed from the asoc */
6600                         /* remove and free it */
6601                         stcb->asoc.numnets--;
6602                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6603                         sctp_free_remote_addr(net);
6604                         if (net == stcb->asoc.primary_destination) {
6605                                 stcb->asoc.primary_destination = NULL;
6606                                 sctp_select_primary_destination(stcb);
6607                         }
6608                 }
6609         }
6610         if ((stcb->asoc.ecn_supported == 1) &&
6611             (peer_supports_ecn == 0)) {
6612                 stcb->asoc.ecn_supported = 0;
6613         }
6614         if ((stcb->asoc.prsctp_supported == 1) &&
6615             (peer_supports_prsctp == 0)) {
6616                 stcb->asoc.prsctp_supported = 0;
6617         }
6618         if ((stcb->asoc.auth_supported == 1) &&
6619             ((peer_supports_auth == 0) ||
6620             (got_random == 0) || (got_hmacs == 0))) {
6621                 stcb->asoc.auth_supported = 0;
6622         }
6623         if ((stcb->asoc.asconf_supported == 1) &&
6624             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6625             (stcb->asoc.auth_supported == 0) ||
6626             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6627                 stcb->asoc.asconf_supported = 0;
6628         }
6629         if ((stcb->asoc.reconfig_supported == 1) &&
6630             (peer_supports_reconfig == 0)) {
6631                 stcb->asoc.reconfig_supported = 0;
6632         }
6633         if ((stcb->asoc.idata_supported == 1) &&
6634             (peer_supports_idata == 0)) {
6635                 stcb->asoc.idata_supported = 0;
6636         }
6637         if ((stcb->asoc.nrsack_supported == 1) &&
6638             (peer_supports_nrsack == 0)) {
6639                 stcb->asoc.nrsack_supported = 0;
6640         }
6641         if ((stcb->asoc.pktdrop_supported == 1) &&
6642             (peer_supports_pktdrop == 0)) {
6643                 stcb->asoc.pktdrop_supported = 0;
6644         }
6645         /* validate authentication required parameters */
6646         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6647                 /* peer does not support auth but sent a chunks list? */
6648                 return (-31);
6649         }
6650         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6651                 /* peer supports asconf but not auth? */
6652                 return (-32);
6653         } else if ((peer_supports_asconf == 1) &&
6654                     (peer_supports_auth == 1) &&
6655             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6656                 return (-33);
6657         }
6658         /* concatenate the full random key */
6659         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6660         if (chunks != NULL) {
6661                 keylen += sizeof(*chunks) + num_chunks;
6662         }
6663         new_key = sctp_alloc_key(keylen);
6664         if (new_key != NULL) {
6665                 /* copy in the RANDOM */
6666                 if (p_random != NULL) {
6667                         keylen = sizeof(*p_random) + random_len;
6668                         memcpy(new_key->key, p_random, keylen);
6669                 } else {
6670                         keylen = 0;
6671                 }
6672                 /* append in the AUTH chunks */
6673                 if (chunks != NULL) {
6674                         memcpy(new_key->key + keylen, chunks,
6675                             sizeof(*chunks) + num_chunks);
6676                         keylen += sizeof(*chunks) + num_chunks;
6677                 }
6678                 /* append in the HMACs */
6679                 if (hmacs != NULL) {
6680                         memcpy(new_key->key + keylen, hmacs,
6681                             sizeof(*hmacs) + hmacs_len);
6682                 }
6683         } else {
6684                 /* failed to get memory for the key */
6685                 return (-34);
6686         }
6687         if (stcb->asoc.authinfo.peer_random != NULL)
6688                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6689         stcb->asoc.authinfo.peer_random = new_key;
6690         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6691         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6692
6693         return (0);
6694 }
6695
6696 int
6697 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6698     struct sctp_nets *net)
6699 {
6700         /* make sure the requested primary address exists in the assoc */
6701         if (net == NULL && sa)
6702                 net = sctp_findnet(stcb, sa);
6703
6704         if (net == NULL) {
6705                 /* didn't find the requested primary address! */
6706                 return (-1);
6707         } else {
6708                 /* set the primary address */
6709                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6710                         /* Must be confirmed, so queue to set */
6711                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6712                         return (0);
6713                 }
6714                 stcb->asoc.primary_destination = net;
6715                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6716                         sctp_free_remote_addr(stcb->asoc.alternate);
6717                         stcb->asoc.alternate = NULL;
6718                 }
6719                 net = TAILQ_FIRST(&stcb->asoc.nets);
6720                 if (net != stcb->asoc.primary_destination) {
6721                         /*
6722                          * first one on the list is NOT the primary
6723                          * sctp_cmpaddr() is much more efficient if the
6724                          * primary is the first on the list, make it so.
6725                          */
6726                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6727                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6728                 }
6729                 return (0);
6730         }
6731 }
6732
6733 int
6734 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6735 {
6736         /*
6737          * This function serves two purposes. It will see if a TAG can be
6738          * re-used and return 1 for yes it is ok and 0 for don't use that
6739          * tag. A secondary function it will do is purge out old tags that
6740          * can be removed.
6741          */
6742         struct sctpvtaghead *chain;
6743         struct sctp_tagblock *twait_block;
6744         struct sctpasochead *head;
6745         struct sctp_tcb *stcb;
6746         int i;
6747
6748         SCTP_INP_INFO_RLOCK();
6749         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6750             SCTP_BASE_INFO(hashasocmark))];
6751         LIST_FOREACH(stcb, head, sctp_asocs) {
6752                 /*
6753                  * We choose not to lock anything here. TCB's can't be
6754                  * removed since we have the read lock, so they can't be
6755                  * freed on us, same thing for the INP. I may be wrong with
6756                  * this assumption, but we will go with it for now :-)
6757                  */
6758                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6759                         continue;
6760                 }
6761                 if (stcb->asoc.my_vtag == tag) {
6762                         /* candidate */
6763                         if (stcb->rport != rport) {
6764                                 continue;
6765                         }
6766                         if (stcb->sctp_ep->sctp_lport != lport) {
6767                                 continue;
6768                         }
6769                         /* Its a used tag set */
6770                         SCTP_INP_INFO_RUNLOCK();
6771                         return (0);
6772                 }
6773         }
6774         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6775         /* Now what about timed wait ? */
6776         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6777                 /*
6778                  * Block(s) are present, lets see if we have this tag in the
6779                  * list
6780                  */
6781                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6782                         if (twait_block->vtag_block[i].v_tag == 0) {
6783                                 /* not used */
6784                                 continue;
6785                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6786                             now->tv_sec) {
6787                                 /* Audit expires this guy */
6788                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6789                                 twait_block->vtag_block[i].v_tag = 0;
6790                                 twait_block->vtag_block[i].lport = 0;
6791                                 twait_block->vtag_block[i].rport = 0;
6792                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6793                                     (twait_block->vtag_block[i].lport == lport) &&
6794                             (twait_block->vtag_block[i].rport == rport)) {
6795                                 /* Bad tag, sorry :< */
6796                                 SCTP_INP_INFO_RUNLOCK();
6797                                 return (0);
6798                         }
6799                 }
6800         }
6801         SCTP_INP_INFO_RUNLOCK();
6802         return (1);
6803 }
6804
6805 static void
6806 sctp_drain_mbufs(struct sctp_tcb *stcb)
6807 {
6808         /*
6809          * We must hunt this association for MBUF's past the cumack (i.e.
6810          * out of order data that we can renege on).
6811          */
6812         struct sctp_association *asoc;
6813         struct sctp_tmit_chunk *chk, *nchk;
6814         uint32_t cumulative_tsn_p1;
6815         struct sctp_queued_to_read *control, *ncontrol;
6816         int cnt, strmat;
6817         uint32_t gap, i;
6818         int fnd = 0;
6819
6820         /* We look for anything larger than the cum-ack + 1 */
6821
6822         asoc = &stcb->asoc;
6823         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6824                 /* none we can reneg on. */
6825                 return;
6826         }
6827         SCTP_STAT_INCR(sctps_protocol_drains_done);
6828         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6829         cnt = 0;
6830         /* Ok that was fun, now we will drain all the inbound streams? */
6831         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6832                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) {
6833 #ifdef INVARIANTS
6834                         if (control->on_strm_q != SCTP_ON_ORDERED) {
6835                                 panic("Huh control: %p on_q: %d -- not ordered?",
6836                                     control, control->on_strm_q);
6837                         }
6838 #endif
6839                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6840                                 /* Yep it is above cum-ack */
6841                                 cnt++;
6842                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6843                                 KASSERT(control->length > 0, ("control has zero length"));
6844                                 if (asoc->size_on_all_streams >= control->length) {
6845                                         asoc->size_on_all_streams -= control->length;
6846                                 } else {
6847 #ifdef INVARIANTS
6848                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6849 #else
6850                                         asoc->size_on_all_streams = 0;
6851 #endif
6852                                 }
6853                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6854                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6855                                 if (control->on_read_q) {
6856                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6857                                         control->on_read_q = 0;
6858                                 }
6859                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm);
6860                                 control->on_strm_q = 0;
6861                                 if (control->data) {
6862                                         sctp_m_freem(control->data);
6863                                         control->data = NULL;
6864                                 }
6865                                 sctp_free_remote_addr(control->whoFrom);
6866                                 /* Now its reasm? */
6867                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6868                                         cnt++;
6869                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6870                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6871                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6872                                                 asoc->size_on_reasm_queue -= chk->send_size;
6873                                         } else {
6874 #ifdef INVARIANTS
6875                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6876 #else
6877                                                 asoc->size_on_reasm_queue = 0;
6878 #endif
6879                                         }
6880                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6881                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6882                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6883                                         if (chk->data) {
6884                                                 sctp_m_freem(chk->data);
6885                                                 chk->data = NULL;
6886                                         }
6887                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6888                                 }
6889                                 sctp_free_a_readq(stcb, control);
6890                         }
6891                 }
6892                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) {
6893 #ifdef INVARIANTS
6894                         if (control->on_strm_q != SCTP_ON_UNORDERED) {
6895                                 panic("Huh control: %p on_q: %d -- not unordered?",
6896                                     control, control->on_strm_q);
6897                         }
6898 #endif
6899                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6900                                 /* Yep it is above cum-ack */
6901                                 cnt++;
6902                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6903                                 KASSERT(control->length > 0, ("control has zero length"));
6904                                 if (asoc->size_on_all_streams >= control->length) {
6905                                         asoc->size_on_all_streams -= control->length;
6906                                 } else {
6907 #ifdef INVARIANTS
6908                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6909 #else
6910                                         asoc->size_on_all_streams = 0;
6911 #endif
6912                                 }
6913                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6914                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6915                                 if (control->on_read_q) {
6916                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6917                                         control->on_read_q = 0;
6918                                 }
6919                                 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm);
6920                                 control->on_strm_q = 0;
6921                                 if (control->data) {
6922                                         sctp_m_freem(control->data);
6923                                         control->data = NULL;
6924                                 }
6925                                 sctp_free_remote_addr(control->whoFrom);
6926                                 /* Now its reasm? */
6927                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6928                                         cnt++;
6929                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6930                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6931                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6932                                                 asoc->size_on_reasm_queue -= chk->send_size;
6933                                         } else {
6934 #ifdef INVARIANTS
6935                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6936 #else
6937                                                 asoc->size_on_reasm_queue = 0;
6938 #endif
6939                                         }
6940                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6941                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6942                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6943                                         if (chk->data) {
6944                                                 sctp_m_freem(chk->data);
6945                                                 chk->data = NULL;
6946                                         }
6947                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6948                                 }
6949                                 sctp_free_a_readq(stcb, control);
6950                         }
6951                 }
6952         }
6953         if (cnt) {
6954                 /* We must back down to see what the new highest is */
6955                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6956                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6957                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6958                                 asoc->highest_tsn_inside_map = i;
6959                                 fnd = 1;
6960                                 break;
6961                         }
6962                 }
6963                 if (!fnd) {
6964                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6965                 }
6966
6967                 /*
6968                  * Question, should we go through the delivery queue? The
6969                  * only reason things are on here is the app not reading OR
6970                  * a p-d-api up. An attacker COULD send enough in to
6971                  * initiate the PD-API and then send a bunch of stuff to
6972                  * other streams... these would wind up on the delivery
6973                  * queue.. and then we would not get to them. But in order
6974                  * to do this I then have to back-track and un-deliver
6975                  * sequence numbers in streams.. el-yucko. I think for now
6976                  * we will NOT look at the delivery queue and leave it to be
6977                  * something to consider later. An alternative would be to
6978                  * abort the P-D-API with a notification and then deliver
6979                  * the data.... Or another method might be to keep track of
6980                  * how many times the situation occurs and if we see a
6981                  * possible attack underway just abort the association.
6982                  */
6983 #ifdef SCTP_DEBUG
6984                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6985 #endif
6986                 /*
6987                  * Now do we need to find a new
6988                  * asoc->highest_tsn_inside_map?
6989                  */
6990                 asoc->last_revoke_count = cnt;
6991                 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
6992                     SCTP_FROM_SCTP_PCB + SCTP_LOC_11);
6993                 /* sa_ignore NO_NULL_CHK */
6994                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6995                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6996         }
6997         /*
6998          * Another issue, in un-setting the TSN's in the mapping array we
6999          * DID NOT adjust the highest_tsn marker.  This will cause one of
7000          * two things to occur. It may cause us to do extra work in checking
7001          * for our mapping array movement. More importantly it may cause us
7002          * to SACK every datagram. This may not be a bad thing though since
7003          * we will recover once we get our cum-ack above and all this stuff
7004          * we dumped recovered.
7005          */
7006 }
7007
7008 void
7009 sctp_drain()
7010 {
7011         /*
7012          * We must walk the PCB lists for ALL associations here. The system
7013          * is LOW on MBUF's and needs help. This is where reneging will
7014          * occur. We really hope this does NOT happen!
7015          */
7016         VNET_ITERATOR_DECL(vnet_iter);
7017         VNET_LIST_RLOCK_NOSLEEP();
7018         VNET_FOREACH(vnet_iter) {
7019                 CURVNET_SET(vnet_iter);
7020                 struct sctp_inpcb *inp;
7021                 struct sctp_tcb *stcb;
7022
7023                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
7024                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7025 #ifdef VIMAGE
7026                         continue;
7027 #else
7028                         return;
7029 #endif
7030                 }
7031                 SCTP_INP_INFO_RLOCK();
7032                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7033                         /* For each endpoint */
7034                         SCTP_INP_RLOCK(inp);
7035                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7036                                 /* For each association */
7037                                 SCTP_TCB_LOCK(stcb);
7038                                 sctp_drain_mbufs(stcb);
7039                                 SCTP_TCB_UNLOCK(stcb);
7040                         }
7041                         SCTP_INP_RUNLOCK(inp);
7042                 }
7043                 SCTP_INP_INFO_RUNLOCK();
7044                 CURVNET_RESTORE();
7045         }
7046         VNET_LIST_RUNLOCK_NOSLEEP();
7047 }
7048
7049 /*
7050  * start a new iterator
7051  * iterates through all endpoints and associations based on the pcb_state
7052  * flags and asoc_state.  "af" (mandatory) is executed for all matching
7053  * assocs and "ef" (optional) is executed when the iterator completes.
7054  * "inpf" (optional) is executed for each new endpoint as it is being
7055  * iterated through. inpe (optional) is called when the inp completes
7056  * its way through all the stcbs.
7057  */
7058 int
7059 sctp_initiate_iterator(inp_func inpf,
7060     asoc_func af,
7061     inp_func inpe,
7062     uint32_t pcb_state,
7063     uint32_t pcb_features,
7064     uint32_t asoc_state,
7065     void *argp,
7066     uint32_t argi,
7067     end_func ef,
7068     struct sctp_inpcb *s_inp,
7069     uint8_t chunk_output_off)
7070 {
7071         struct sctp_iterator *it = NULL;
7072
7073         if (af == NULL) {
7074                 return (-1);
7075         }
7076         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7077                 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7078                     SCTP_BASE_VAR(sctp_pcb_initialized));
7079                 return (-1);
7080         }
7081         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7082             SCTP_M_ITER);
7083         if (it == NULL) {
7084                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7085                 return (-1);
7086         }
7087         memset(it, 0, sizeof(*it));
7088         it->function_assoc = af;
7089         it->function_inp = inpf;
7090         if (inpf)
7091                 it->done_current_ep = 0;
7092         else
7093                 it->done_current_ep = 1;
7094         it->function_atend = ef;
7095         it->pointer = argp;
7096         it->val = argi;
7097         it->pcb_flags = pcb_state;
7098         it->pcb_features = pcb_features;
7099         it->asoc_state = asoc_state;
7100         it->function_inp_end = inpe;
7101         it->no_chunk_output = chunk_output_off;
7102         it->vn = curvnet;
7103         if (s_inp) {
7104                 /* Assume lock is held here */
7105                 it->inp = s_inp;
7106                 SCTP_INP_INCR_REF(it->inp);
7107                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7108         } else {
7109                 SCTP_INP_INFO_RLOCK();
7110                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7111                 if (it->inp) {
7112                         SCTP_INP_INCR_REF(it->inp);
7113                 }
7114                 SCTP_INP_INFO_RUNLOCK();
7115                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7116
7117         }
7118         SCTP_IPI_ITERATOR_WQ_LOCK();
7119         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7120                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7121                 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7122                     SCTP_BASE_VAR(sctp_pcb_initialized), it);
7123                 SCTP_FREE(it, SCTP_M_ITER);
7124                 return (-1);
7125         }
7126         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7127         if (sctp_it_ctl.iterator_running == 0) {
7128                 sctp_wakeup_iterator();
7129         }
7130         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7131         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7132         return (0);
7133 }