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                         SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
 545                 } else {
 546                         SCTP_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.
 750                          */
 751                         if (if_name) {
 752                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 753                                         /* They match its a correct delete */
 754                                         valid = 1;
 755                                 }
 756                         }
 757                         if (!valid) {
 758                                 /* last ditch check ifn_index */
 759                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 760                                         valid = 1;
 761                                 }
 762                         }
 763                         if (!valid) {
 764                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 765                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 766                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 767                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 768                                 SCTP_IPI_ADDR_WUNLOCK();
 769                                 return;
 770                         }
 771                 }
 772                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
 773                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 774                 /*
 775                  * We don't set the flag. This means that the structure will
 776                  * hang around in EP's that have bound specific to it until
 777                  * they close. This gives us TCP like behavior if someone
 778                  * removes an address (or for that matter adds it right
 779                  * back).
 780                  */
 781                 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
 782                 vrf->total_ifa_count--;
 783                 LIST_REMOVE(sctp_ifap, next_bucket);
 784                 sctp_remove_ifa_from_ifn(sctp_ifap);
 785         }
 786 #ifdef SCTP_DEBUG
 787         else {
 788                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 789                     ifn_index);
 790                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 791         }
 792 #endif
 793
 794 out_now:
 795         SCTP_IPI_ADDR_WUNLOCK();
 796         if (sctp_ifap) {
 797                 struct sctp_laddr *wi;
 798
 799                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 800                 if (wi == NULL) {
 801                         /*
 802                          * Gak, what can we do? We have lost an address
 803                          * change can you say HOSED?
 804                          */
 805                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 806
 807                         /* Oops, must decrement the count */
 808                         sctp_free_ifa(sctp_ifap);
 809                         return;
 810                 }
 811                 SCTP_INCR_LADDR_COUNT();
 812                 memset(wi, 0, sizeof(*wi));
 813                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 814                 wi->ifa = sctp_ifap;
 815                 wi->action = SCTP_DEL_IP_ADDRESS;
 816                 SCTP_WQ_ADDR_LOCK();
 817                 /*
 818                  * Should this really be a tailq? As it is we will process
 819                  * the newest first :-0
 820                  */
 821                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 822                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 823                     (struct sctp_inpcb *)NULL,
 824                     (struct sctp_tcb *)NULL,
 825                     (struct sctp_nets *)NULL);
 826                 SCTP_WQ_ADDR_UNLOCK();
 827         }
 828         return;
 829 }
 830
 831
 832 static int
 833 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
 834 {
 835         int loopback_scope;
 836 #if defined(INET)
 837         int ipv4_local_scope, ipv4_addr_legal;
 838 #endif
 839 #if defined(INET6)
 840         int local_scope, site_scope, ipv6_addr_legal;
 841 #endif
 842         struct sctp_vrf *vrf;
 843         struct sctp_ifn *sctp_ifn;
 844         struct sctp_ifa *sctp_ifa;
 845
 846         loopback_scope = stcb->asoc.scope.loopback_scope;
 847 #if defined(INET)
 848         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
 849         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
 850 #endif
 851 #if defined(INET6)
 852         local_scope = stcb->asoc.scope.local_scope;
 853         site_scope = stcb->asoc.scope.site_scope;
 854         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
 855 #endif
 856
 857         SCTP_IPI_ADDR_RLOCK();
 858         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
 859         if (vrf == NULL) {
 860                 /* no vrf, no addresses */
 861                 SCTP_IPI_ADDR_RUNLOCK();
 862                 return (0);
 863         }
 864
 865         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 866                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 867                         if ((loopback_scope == 0) &&
 868                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 869                                 continue;
 870                         }
 871                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 872                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
 873                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
 874                                         /*
 875                                          * We allow pending addresses, where
 876                                          * we have sent an asconf-add to be
 877                                          * considered valid.
 878                                          */
 879                                         continue;
 880                                 }
 881                                 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
 882                                         continue;
 883                                 }
 884                                 switch (sctp_ifa->address.sa.sa_family) {
 885 #ifdef INET
 886                                 case AF_INET:
 887                                         if (ipv4_addr_legal) {
 888                                                 struct sockaddr_in *sin,
 889                                                            *rsin;
 890
 891                                                 sin = &sctp_ifa->address.sin;
 892                                                 rsin = (struct sockaddr_in *)to;
 893                                                 if ((ipv4_local_scope == 0) &&
 894                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 895                                                         continue;
 896                                                 }
 897                                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
 898                                                     &sin->sin_addr) != 0) {
 899                                                         continue;
 900                                                 }
 901                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 902                                                         SCTP_IPI_ADDR_RUNLOCK();
 903                                                         return (1);
 904                                                 }
 905                                         }
 906                                         break;
 907 #endif
 908 #ifdef INET6
 909                                 case AF_INET6:
 910                                         if (ipv6_addr_legal) {
 911                                                 struct sockaddr_in6 *sin6,
 912                                                             *rsin6;
 913
 914                                                 sin6 = &sctp_ifa->address.sin6;
 915                                                 rsin6 = (struct sockaddr_in6 *)to;
 916                                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
 917                                                     &sin6->sin6_addr) != 0) {
 918                                                         continue;
 919                                                 }
 920                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 921                                                         if (local_scope == 0)
 922                                                                 continue;
 923                                                         if (sin6->sin6_scope_id == 0) {
 924                                                                 if (sa6_recoverscope(sin6) != 0)
 925                                                                         continue;
 926                                                         }
 927                                                 }
 928                                                 if ((site_scope == 0) &&
 929                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
 930                                                         continue;
 931                                                 }
 932                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 933                                                         SCTP_IPI_ADDR_RUNLOCK();
 934                                                         return (1);
 935                                                 }
 936                                         }
 937                                         break;
 938 #endif
 939                                 default:
 940                                         /* TSNH */
 941                                         break;
 942                                 }
 943                         }
 944                 }
 945         } else {
 946                 struct sctp_laddr *laddr;
 947
 948                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
 949                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 950                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 951                                 continue;
 952                         }
 953                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
 954                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
 955                                 /*
 956                                  * We allow pending addresses, where we have
 957                                  * sent an asconf-add to be considered
 958                                  * valid.
 959                                  */
 960                                 continue;
 961                         }
 962                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
 963                                 continue;
 964                         }
 965                         switch (to->sa_family) {
 966 #ifdef INET
 967                         case AF_INET:
 968                                 {
 969                                         struct sockaddr_in *sin, *rsin;
 970
 971                                         sin = &laddr->ifa->address.sin;
 972                                         rsin = (struct sockaddr_in *)to;
 973                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 974                                                 SCTP_IPI_ADDR_RUNLOCK();
 975                                                 return (1);
 976                                         }
 977                                         break;
 978                                 }
 979 #endif
 980 #ifdef INET6
 981                         case AF_INET6:
 982                                 {
 983                                         struct sockaddr_in6 *sin6, *rsin6;
 984
 985                                         sin6 = &laddr->ifa->address.sin6;
 986                                         rsin6 = (struct sockaddr_in6 *)to;
 987                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 988                                                 SCTP_IPI_ADDR_RUNLOCK();
 989                                                 return (1);
 990                                         }
 991                                         break;
 992                                 }
 993
 994 #endif
 995                         default:
 996                                 /* TSNH */
 997                                 break;
 998                         }
 999
1000                 }
1001         }
1002         SCTP_IPI_ADDR_RUNLOCK();
1003         return (0);
1004 }
1005
1006
1007 static struct sctp_tcb *
1008 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1009     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1010 {
1011         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1012         /*
1013          * If we support the TCP model, then we must now dig through to see
1014          * if we can find our endpoint in the list of tcp ep's.
1015          */
1016         uint16_t lport, rport;
1017         struct sctppcbhead *ephead;
1018         struct sctp_inpcb *inp;
1019         struct sctp_laddr *laddr;
1020         struct sctp_tcb *stcb;
1021         struct sctp_nets *net;
1022
1023         if ((to == NULL) || (from == NULL)) {
1024                 return (NULL);
1025         }
1026
1027         switch (to->sa_family) {
1028 #ifdef INET
1029         case AF_INET:
1030                 if (from->sa_family == AF_INET) {
1031                         lport = ((struct sockaddr_in *)to)->sin_port;
1032                         rport = ((struct sockaddr_in *)from)->sin_port;
1033                 } else {
1034                         return (NULL);
1035                 }
1036                 break;
1037 #endif
1038 #ifdef INET6
1039         case AF_INET6:
1040                 if (from->sa_family == AF_INET6) {
1041                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
1042                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
1043                 } else {
1044                         return (NULL);
1045                 }
1046                 break;
1047 #endif
1048         default:
1049                 return (NULL);
1050         }
1051         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1052         /*
1053          * Ok now for each of the guys in this bucket we must look and see:
1054          * - Does the remote port match. - Does there single association's
1055          * addresses match this address (to). If so we update p_ep to point
1056          * to this ep and return the tcb from it.
1057          */
1058         LIST_FOREACH(inp, ephead, sctp_hash) {
1059                 SCTP_INP_RLOCK(inp);
1060                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1061                         SCTP_INP_RUNLOCK(inp);
1062                         continue;
1063                 }
1064                 if (lport != inp->sctp_lport) {
1065                         SCTP_INP_RUNLOCK(inp);
1066                         continue;
1067                 }
1068                 switch (to->sa_family) {
1069 #ifdef INET
1070                 case AF_INET:
1071                         {
1072                                 struct sockaddr_in *sin;
1073
1074                                 sin = (struct sockaddr_in *)to;
1075                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1076                                     &sin->sin_addr) != 0) {
1077                                         SCTP_INP_RUNLOCK(inp);
1078                                         continue;
1079                                 }
1080                                 break;
1081                         }
1082 #endif
1083 #ifdef INET6
1084                 case AF_INET6:
1085                         {
1086                                 struct sockaddr_in6 *sin6;
1087
1088                                 sin6 = (struct sockaddr_in6 *)to;
1089                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1090                                     &sin6->sin6_addr) != 0) {
1091                                         SCTP_INP_RUNLOCK(inp);
1092                                         continue;
1093                                 }
1094                                 break;
1095                         }
1096 #endif
1097                 default:
1098                         SCTP_INP_RUNLOCK(inp);
1099                         continue;
1100                 }
1101                 if (inp->def_vrf_id != vrf_id) {
1102                         SCTP_INP_RUNLOCK(inp);
1103                         continue;
1104                 }
1105                 /* check to see if the ep has one of the addresses */
1106                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1107                         /* We are NOT bound all, so look further */
1108                         int match = 0;
1109
1110                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1111
1112                                 if (laddr->ifa == NULL) {
1113                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__);
1114                                         continue;
1115                                 }
1116                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1117                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1118                                         continue;
1119                                 }
1120                                 if (laddr->ifa->address.sa.sa_family ==
1121                                     to->sa_family) {
1122                                         /* see if it matches */
1123 #ifdef INET
1124                                         if (from->sa_family == AF_INET) {
1125                                                 struct sockaddr_in *intf_addr,
1126                                                            *sin;
1127
1128                                                 intf_addr = &laddr->ifa->address.sin;
1129                                                 sin = (struct sockaddr_in *)to;
1130                                                 if (sin->sin_addr.s_addr ==
1131                                                     intf_addr->sin_addr.s_addr) {
1132                                                         match = 1;
1133                                                         break;
1134                                                 }
1135                                         }
1136 #endif
1137 #ifdef INET6
1138                                         if (from->sa_family == AF_INET6) {
1139                                                 struct sockaddr_in6 *intf_addr6;
1140                                                 struct sockaddr_in6 *sin6;
1141
1142                                                 sin6 = (struct sockaddr_in6 *)
1143                                                     to;
1144                                                 intf_addr6 = &laddr->ifa->address.sin6;
1145
1146                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1147                                                     intf_addr6)) {
1148                                                         match = 1;
1149                                                         break;
1150                                                 }
1151                                         }
1152 #endif
1153                                 }
1154                         }
1155                         if (match == 0) {
1156                                 /* This endpoint does not have this address */
1157                                 SCTP_INP_RUNLOCK(inp);
1158                                 continue;
1159                         }
1160                 }
1161                 /*
1162                  * Ok if we hit here the ep has the address, does it hold
1163                  * the tcb?
1164                  */
1165                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1166                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1167                 if (stcb == NULL) {
1168                         SCTP_INP_RUNLOCK(inp);
1169                         continue;
1170                 }
1171                 SCTP_TCB_LOCK(stcb);
1172                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1173                         SCTP_TCB_UNLOCK(stcb);
1174                         SCTP_INP_RUNLOCK(inp);
1175                         continue;
1176                 }
1177                 if (stcb->rport != rport) {
1178                         /* remote port does not match. */
1179                         SCTP_TCB_UNLOCK(stcb);
1180                         SCTP_INP_RUNLOCK(inp);
1181                         continue;
1182                 }
1183                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1184                         SCTP_TCB_UNLOCK(stcb);
1185                         SCTP_INP_RUNLOCK(inp);
1186                         continue;
1187                 }
1188                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1189                         SCTP_TCB_UNLOCK(stcb);
1190                         SCTP_INP_RUNLOCK(inp);
1191                         continue;
1192                 }
1193                 /* Does this TCB have a matching address? */
1194                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1195
1196                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1197                                 /* not the same family, can't be a match */
1198                                 continue;
1199                         }
1200                         switch (from->sa_family) {
1201 #ifdef INET
1202                         case AF_INET:
1203                                 {
1204                                         struct sockaddr_in *sin, *rsin;
1205
1206                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
1207                                         rsin = (struct sockaddr_in *)from;
1208                                         if (sin->sin_addr.s_addr ==
1209                                             rsin->sin_addr.s_addr) {
1210                                                 /* found it */
1211                                                 if (netp != NULL) {
1212                                                         *netp = net;
1213                                                 }
1214                                                 /*
1215                                                  * Update the endpoint
1216                                                  * pointer
1217                                                  */
1218                                                 *inp_p = inp;
1219                                                 SCTP_INP_RUNLOCK(inp);
1220                                                 return (stcb);
1221                                         }
1222                                         break;
1223                                 }
1224 #endif
1225 #ifdef INET6
1226                         case AF_INET6:
1227                                 {
1228                                         struct sockaddr_in6 *sin6, *rsin6;
1229
1230                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1231                                         rsin6 = (struct sockaddr_in6 *)from;
1232                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1233                                             rsin6)) {
1234                                                 /* found it */
1235                                                 if (netp != NULL) {
1236                                                         *netp = net;
1237                                                 }
1238                                                 /*
1239                                                  * Update the endpoint
1240                                                  * pointer
1241                                                  */
1242                                                 *inp_p = inp;
1243                                                 SCTP_INP_RUNLOCK(inp);
1244                                                 return (stcb);
1245                                         }
1246                                         break;
1247                                 }
1248 #endif
1249                         default:
1250                                 /* TSNH */
1251                                 break;
1252                         }
1253                 }
1254                 SCTP_TCB_UNLOCK(stcb);
1255                 SCTP_INP_RUNLOCK(inp);
1256         }
1257         return (NULL);
1258 }
1259
1260
1261 /*
1262  * rules for use
1263  *
1264  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1265  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1266  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1267  * NULL.
1268  */
1269
1270 struct sctp_tcb *
1271 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1272     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1273 {
1274         struct sctpasochead *head;
1275         struct sctp_inpcb *inp;
1276         struct sctp_tcb *stcb = NULL;
1277         struct sctp_nets *net;
1278         uint16_t rport;
1279
1280         inp = *inp_p;
1281         switch (remote->sa_family) {
1282 #ifdef INET
1283         case AF_INET:
1284                 rport = (((struct sockaddr_in *)remote)->sin_port);
1285                 break;
1286 #endif
1287 #ifdef INET6
1288         case AF_INET6:
1289                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1290                 break;
1291 #endif
1292         default:
1293                 return (NULL);
1294         }
1295         if (locked_tcb) {
1296                 /*
1297                  * UN-lock so we can do proper locking here this occurs when
1298                  * called from load_addresses_from_init.
1299                  */
1300                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1301                 SCTP_TCB_UNLOCK(locked_tcb);
1302         }
1303         SCTP_INP_INFO_RLOCK();
1304         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1305             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1306                 /*-
1307                  * Now either this guy is our listener or it's the
1308                  * connector. If it is the one that issued the connect, then
1309                  * it's only chance is to be the first TCB in the list. If
1310                  * it is the acceptor, then do the special_lookup to hash
1311                  * and find the real inp.
1312                  */
1313                 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) {
1314                         /* to is peer addr, from is my addr */
1315                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1316                             netp, inp->def_vrf_id);
1317                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1318                                 /* we have a locked tcb, lower refcount */
1319                                 SCTP_INP_DECR_REF(inp);
1320                         }
1321                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1322                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1323                                 SCTP_TCB_LOCK(locked_tcb);
1324                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1325                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1326                         }
1327                         SCTP_INP_INFO_RUNLOCK();
1328                         return (stcb);
1329                 } else {
1330                         SCTP_INP_WLOCK(inp);
1331                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1332                                 goto null_return;
1333                         }
1334                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1335                         if (stcb == NULL) {
1336                                 goto null_return;
1337                         }
1338                         SCTP_TCB_LOCK(stcb);
1339
1340                         if (stcb->rport != rport) {
1341                                 /* remote port does not match. */
1342                                 SCTP_TCB_UNLOCK(stcb);
1343                                 goto null_return;
1344                         }
1345                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1346                                 SCTP_TCB_UNLOCK(stcb);
1347                                 goto null_return;
1348                         }
1349                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1350                                 SCTP_TCB_UNLOCK(stcb);
1351                                 goto null_return;
1352                         }
1353                         /* now look at the list of remote addresses */
1354                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1355 #ifdef INVARIANTS
1356                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1357                                         panic("Corrupt net list");
1358                                 }
1359 #endif
1360                                 if (net->ro._l_addr.sa.sa_family !=
1361                                     remote->sa_family) {
1362                                         /* not the same family */
1363                                         continue;
1364                                 }
1365                                 switch (remote->sa_family) {
1366 #ifdef INET
1367                                 case AF_INET:
1368                                         {
1369                                                 struct sockaddr_in *sin,
1370                                                            *rsin;
1371
1372                                                 sin = (struct sockaddr_in *)
1373                                                     &net->ro._l_addr;
1374                                                 rsin = (struct sockaddr_in *)remote;
1375                                                 if (sin->sin_addr.s_addr ==
1376                                                     rsin->sin_addr.s_addr) {
1377                                                         /* found it */
1378                                                         if (netp != NULL) {
1379                                                                 *netp = net;
1380                                                         }
1381                                                         if (locked_tcb == NULL) {
1382                                                                 SCTP_INP_DECR_REF(inp);
1383                                                         } else if (locked_tcb != stcb) {
1384                                                                 SCTP_TCB_LOCK(locked_tcb);
1385                                                         }
1386                                                         if (locked_tcb) {
1387                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1388                                                         }
1389
1390                                                         SCTP_INP_WUNLOCK(inp);
1391                                                         SCTP_INP_INFO_RUNLOCK();
1392                                                         return (stcb);
1393                                                 }
1394                                                 break;
1395                                         }
1396 #endif
1397 #ifdef INET6
1398                                 case AF_INET6:
1399                                         {
1400                                                 struct sockaddr_in6 *sin6,
1401                                                             *rsin6;
1402
1403                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1404                                                 rsin6 = (struct sockaddr_in6 *)remote;
1405                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1406                                                     rsin6)) {
1407                                                         /* found it */
1408                                                         if (netp != NULL) {
1409                                                                 *netp = net;
1410                                                         }
1411                                                         if (locked_tcb == NULL) {
1412                                                                 SCTP_INP_DECR_REF(inp);
1413                                                         } else if (locked_tcb != stcb) {
1414                                                                 SCTP_TCB_LOCK(locked_tcb);
1415                                                         }
1416                                                         if (locked_tcb) {
1417                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1418                                                         }
1419                                                         SCTP_INP_WUNLOCK(inp);
1420                                                         SCTP_INP_INFO_RUNLOCK();
1421                                                         return (stcb);
1422                                                 }
1423                                                 break;
1424                                         }
1425 #endif
1426                                 default:
1427                                         /* TSNH */
1428                                         break;
1429                                 }
1430                         }
1431                         SCTP_TCB_UNLOCK(stcb);
1432                 }
1433         } else {
1434                 SCTP_INP_WLOCK(inp);
1435                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1436                         goto null_return;
1437                 }
1438                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1439                     inp->sctp_hashmark)];
1440                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1441                         if (stcb->rport != rport) {
1442                                 /* remote port does not match */
1443                                 continue;
1444                         }
1445                         SCTP_TCB_LOCK(stcb);
1446                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1447                                 SCTP_TCB_UNLOCK(stcb);
1448                                 continue;
1449                         }
1450                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1451                                 SCTP_TCB_UNLOCK(stcb);
1452                                 continue;
1453                         }
1454                         /* now look at the list of remote addresses */
1455                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1456 #ifdef INVARIANTS
1457                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1458                                         panic("Corrupt net list");
1459                                 }
1460 #endif
1461                                 if (net->ro._l_addr.sa.sa_family !=
1462                                     remote->sa_family) {
1463                                         /* not the same family */
1464                                         continue;
1465                                 }
1466                                 switch (remote->sa_family) {
1467 #ifdef INET
1468                                 case AF_INET:
1469                                         {
1470                                                 struct sockaddr_in *sin,
1471                                                            *rsin;
1472
1473                                                 sin = (struct sockaddr_in *)
1474                                                     &net->ro._l_addr;
1475                                                 rsin = (struct sockaddr_in *)remote;
1476                                                 if (sin->sin_addr.s_addr ==
1477                                                     rsin->sin_addr.s_addr) {
1478                                                         /* found it */
1479                                                         if (netp != NULL) {
1480                                                                 *netp = net;
1481                                                         }
1482                                                         if (locked_tcb == NULL) {
1483                                                                 SCTP_INP_DECR_REF(inp);
1484                                                         } else if (locked_tcb != stcb) {
1485                                                                 SCTP_TCB_LOCK(locked_tcb);
1486                                                         }
1487                                                         if (locked_tcb) {
1488                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1489                                                         }
1490                                                         SCTP_INP_WUNLOCK(inp);
1491                                                         SCTP_INP_INFO_RUNLOCK();
1492                                                         return (stcb);
1493                                                 }
1494                                                 break;
1495                                         }
1496 #endif
1497 #ifdef INET6
1498                                 case AF_INET6:
1499                                         {
1500                                                 struct sockaddr_in6 *sin6,
1501                                                             *rsin6;
1502
1503                                                 sin6 = (struct sockaddr_in6 *)
1504                                                     &net->ro._l_addr;
1505                                                 rsin6 = (struct sockaddr_in6 *)remote;
1506                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1507                                                     rsin6)) {
1508                                                         /* found it */
1509                                                         if (netp != NULL) {
1510                                                                 *netp = net;
1511                                                         }
1512                                                         if (locked_tcb == NULL) {
1513                                                                 SCTP_INP_DECR_REF(inp);
1514                                                         } else if (locked_tcb != stcb) {
1515                                                                 SCTP_TCB_LOCK(locked_tcb);
1516                                                         }
1517                                                         if (locked_tcb) {
1518                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1519                                                         }
1520                                                         SCTP_INP_WUNLOCK(inp);
1521                                                         SCTP_INP_INFO_RUNLOCK();
1522                                                         return (stcb);
1523                                                 }
1524                                                 break;
1525                                         }
1526 #endif
1527                                 default:
1528                                         /* TSNH */
1529                                         break;
1530                                 }
1531                         }
1532                         SCTP_TCB_UNLOCK(stcb);
1533                 }
1534         }
1535 null_return:
1536         /* clean up for returning null */
1537         if (locked_tcb) {
1538                 SCTP_TCB_LOCK(locked_tcb);
1539                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1540         }
1541         SCTP_INP_WUNLOCK(inp);
1542         SCTP_INP_INFO_RUNLOCK();
1543         /* not found */
1544         return (NULL);
1545 }
1546
1547
1548 /*
1549  * Find an association for a specific endpoint using the association id given
1550  * out in the COMM_UP notification
1551  */
1552 struct sctp_tcb *
1553 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1554 {
1555         /*
1556          * Use my the assoc_id to find a endpoint
1557          */
1558         struct sctpasochead *head;
1559         struct sctp_tcb *stcb;
1560         uint32_t id;
1561
1562         if (inp == NULL) {
1563                 SCTP_PRINTF("TSNH ep_associd\n");
1564                 return (NULL);
1565         }
1566         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1567                 SCTP_PRINTF("TSNH ep_associd0\n");
1568                 return (NULL);
1569         }
1570         id = (uint32_t)asoc_id;
1571         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1572         if (head == NULL) {
1573                 /* invalid id TSNH */
1574                 SCTP_PRINTF("TSNH ep_associd1\n");
1575                 return (NULL);
1576         }
1577         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1578                 if (stcb->asoc.assoc_id == id) {
1579                         if (inp != stcb->sctp_ep) {
1580                                 /*
1581                                  * some other guy has the same id active (id
1582                                  * collision ??).
1583                                  */
1584                                 SCTP_PRINTF("TSNH ep_associd2\n");
1585                                 continue;
1586                         }
1587                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1588                                 continue;
1589                         }
1590                         if (want_lock) {
1591                                 SCTP_TCB_LOCK(stcb);
1592                         }
1593                         return (stcb);
1594                 }
1595         }
1596         return (NULL);
1597 }
1598
1599
1600 struct sctp_tcb *
1601 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1602 {
1603         struct sctp_tcb *stcb;
1604
1605         SCTP_INP_RLOCK(inp);
1606         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1607         SCTP_INP_RUNLOCK(inp);
1608         return (stcb);
1609 }
1610
1611
1612 /*
1613  * Endpoint probe expects that the INP_INFO is locked.
1614  */
1615 static struct sctp_inpcb *
1616 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1617     uint16_t lport, uint32_t vrf_id)
1618 {
1619         struct sctp_inpcb *inp;
1620         struct sctp_laddr *laddr;
1621 #ifdef INET
1622         struct sockaddr_in *sin;
1623 #endif
1624 #ifdef INET6
1625         struct sockaddr_in6 *sin6;
1626         struct sockaddr_in6 *intf_addr6;
1627 #endif
1628         int fnd;
1629
1630 #ifdef INET
1631         sin = NULL;
1632 #endif
1633 #ifdef INET6
1634         sin6 = NULL;
1635 #endif
1636         switch (nam->sa_family) {
1637 #ifdef INET
1638         case AF_INET:
1639                 sin = (struct sockaddr_in *)nam;
1640                 break;
1641 #endif
1642 #ifdef INET6
1643         case AF_INET6:
1644                 sin6 = (struct sockaddr_in6 *)nam;
1645                 break;
1646 #endif
1647         default:
1648                 /* unsupported family */
1649                 return (NULL);
1650         }
1651
1652         if (head == NULL)
1653                 return (NULL);
1654
1655         LIST_FOREACH(inp, head, sctp_hash) {
1656                 SCTP_INP_RLOCK(inp);
1657                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1658                         SCTP_INP_RUNLOCK(inp);
1659                         continue;
1660                 }
1661                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1662                     (inp->sctp_lport == lport)) {
1663                         /* got it */
1664                         switch (nam->sa_family) {
1665 #ifdef INET
1666                         case AF_INET:
1667                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1668                                     SCTP_IPV6_V6ONLY(inp)) {
1669                                         /*
1670                                          * IPv4 on a IPv6 socket with ONLY
1671                                          * IPv6 set
1672                                          */
1673                                         SCTP_INP_RUNLOCK(inp);
1674                                         continue;
1675                                 }
1676                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1677                                     &sin->sin_addr) != 0) {
1678                                         SCTP_INP_RUNLOCK(inp);
1679                                         continue;
1680                                 }
1681                                 break;
1682 #endif
1683 #ifdef INET6
1684                         case AF_INET6:
1685                                 /*
1686                                  * A V6 address and the endpoint is NOT
1687                                  * bound V6
1688                                  */
1689                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1690                                         SCTP_INP_RUNLOCK(inp);
1691                                         continue;
1692                                 }
1693                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1694                                     &sin6->sin6_addr) != 0) {
1695                                         SCTP_INP_RUNLOCK(inp);
1696                                         continue;
1697                                 }
1698                                 break;
1699 #endif
1700                         default:
1701                                 break;
1702                         }
1703                         /* does a VRF id match? */
1704                         fnd = 0;
1705                         if (inp->def_vrf_id == vrf_id)
1706                                 fnd = 1;
1707
1708                         SCTP_INP_RUNLOCK(inp);
1709                         if (!fnd)
1710                                 continue;
1711                         return (inp);
1712                 }
1713                 SCTP_INP_RUNLOCK(inp);
1714         }
1715         switch (nam->sa_family) {
1716 #ifdef INET
1717         case AF_INET:
1718                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1719                         /* Can't hunt for one that has no address specified */
1720                         return (NULL);
1721                 }
1722                 break;
1723 #endif
1724 #ifdef INET6
1725         case AF_INET6:
1726                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1727                         /* Can't hunt for one that has no address specified */
1728                         return (NULL);
1729                 }
1730                 break;
1731 #endif
1732         default:
1733                 break;
1734         }
1735         /*
1736          * ok, not bound to all so see if we can find a EP bound to this
1737          * address.
1738          */
1739         LIST_FOREACH(inp, head, sctp_hash) {
1740                 SCTP_INP_RLOCK(inp);
1741                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1742                         SCTP_INP_RUNLOCK(inp);
1743                         continue;
1744                 }
1745                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1746                         SCTP_INP_RUNLOCK(inp);
1747                         continue;
1748                 }
1749                 /*
1750                  * Ok this could be a likely candidate, look at all of its
1751                  * addresses
1752                  */
1753                 if (inp->sctp_lport != lport) {
1754                         SCTP_INP_RUNLOCK(inp);
1755                         continue;
1756                 }
1757                 /* does a VRF id match? */
1758                 fnd = 0;
1759                 if (inp->def_vrf_id == vrf_id)
1760                         fnd = 1;
1761
1762                 if (!fnd) {
1763                         SCTP_INP_RUNLOCK(inp);
1764                         continue;
1765                 }
1766                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1767                         if (laddr->ifa == NULL) {
1768                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1769                                     __func__);
1770                                 continue;
1771                         }
1772                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1773                             (void *)laddr->ifa);
1774                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1775                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1776                                 continue;
1777                         }
1778                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1779                                 /* possible, see if it matches */
1780                                 switch (nam->sa_family) {
1781 #ifdef INET
1782                                 case AF_INET:
1783                                         if (sin->sin_addr.s_addr ==
1784                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1785                                                 SCTP_INP_RUNLOCK(inp);
1786                                                 return (inp);
1787                                         }
1788                                         break;
1789 #endif
1790 #ifdef INET6
1791                                 case AF_INET6:
1792                                         intf_addr6 = &laddr->ifa->address.sin6;
1793                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1794                                             intf_addr6)) {
1795                                                 SCTP_INP_RUNLOCK(inp);
1796                                                 return (inp);
1797                                         }
1798                                         break;
1799 #endif
1800                                 }
1801                         }
1802                 }
1803                 SCTP_INP_RUNLOCK(inp);
1804         }
1805         return (NULL);
1806 }
1807
1808
1809 static struct sctp_inpcb *
1810 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1811 {
1812         struct sctppcbhead *head;
1813         struct sctp_inpcb *t_inp;
1814         int fnd;
1815
1816         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1817             SCTP_BASE_INFO(hashmark))];
1818         LIST_FOREACH(t_inp, head, sctp_hash) {
1819                 if (t_inp->sctp_lport != lport) {
1820                         continue;
1821                 }
1822                 /* is it in the VRF in question */
1823                 fnd = 0;
1824                 if (t_inp->def_vrf_id == vrf_id)
1825                         fnd = 1;
1826                 if (!fnd)
1827                         continue;
1828
1829                 /* This one is in use. */
1830                 /* check the v6/v4 binding issue */
1831                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1832                     SCTP_IPV6_V6ONLY(t_inp)) {
1833                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1834                                 /* collision in V6 space */
1835                                 return (t_inp);
1836                         } else {
1837                                 /* inp is BOUND_V4 no conflict */
1838                                 continue;
1839                         }
1840                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1841                         /* t_inp is bound v4 and v6, conflict always */
1842                         return (t_inp);
1843                 } else {
1844                         /* t_inp is bound only V4 */
1845                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1846                             SCTP_IPV6_V6ONLY(inp)) {
1847                                 /* no conflict */
1848                                 continue;
1849                         }
1850                         /* else fall through to conflict */
1851                 }
1852                 return (t_inp);
1853         }
1854         return (NULL);
1855 }
1856
1857
1858 int
1859 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1860 {
1861         /* For 1-2-1 with port reuse */
1862         struct sctppcbhead *head;
1863         struct sctp_inpcb *tinp, *ninp;
1864
1865         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1866                 /* only works with port reuse on */
1867                 return (-1);
1868         }
1869         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1870                 return (0);
1871         }
1872         SCTP_INP_RUNLOCK(inp);
1873         SCTP_INP_INFO_WLOCK();
1874         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1875             SCTP_BASE_INFO(hashmark))];
1876         /* Kick out all non-listeners to the TCP hash */
1877         LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1878                 if (tinp->sctp_lport != inp->sctp_lport) {
1879                         continue;
1880                 }
1881                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1882                         continue;
1883                 }
1884                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1885                         continue;
1886                 }
1887                 if (SCTP_IS_LISTENING(tinp)) {
1888                         continue;
1889                 }
1890                 SCTP_INP_WLOCK(tinp);
1891                 LIST_REMOVE(tinp, sctp_hash);
1892                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1893                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1894                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1895                 SCTP_INP_WUNLOCK(tinp);
1896         }
1897         SCTP_INP_WLOCK(inp);
1898         /* Pull from where he was */
1899         LIST_REMOVE(inp, sctp_hash);
1900         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1901         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1902         LIST_INSERT_HEAD(head, inp, sctp_hash);
1903         SCTP_INP_WUNLOCK(inp);
1904         SCTP_INP_RLOCK(inp);
1905         SCTP_INP_INFO_WUNLOCK();
1906         return (0);
1907 }
1908
1909
1910 struct sctp_inpcb *
1911 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1912     uint32_t vrf_id)
1913 {
1914         /*
1915          * First we check the hash table to see if someone has this port
1916          * bound with just the port.
1917          */
1918         struct sctp_inpcb *inp;
1919         struct sctppcbhead *head;
1920         int lport;
1921         unsigned int i;
1922 #ifdef INET
1923         struct sockaddr_in *sin;
1924 #endif
1925 #ifdef INET6
1926         struct sockaddr_in6 *sin6;
1927 #endif
1928
1929         switch (nam->sa_family) {
1930 #ifdef INET
1931         case AF_INET:
1932                 sin = (struct sockaddr_in *)nam;
1933                 lport = sin->sin_port;
1934                 break;
1935 #endif
1936 #ifdef INET6
1937         case AF_INET6:
1938                 sin6 = (struct sockaddr_in6 *)nam;
1939                 lport = sin6->sin6_port;
1940                 break;
1941 #endif
1942         default:
1943                 return (NULL);
1944         }
1945         /*
1946          * I could cheat here and just cast to one of the types but we will
1947          * do it right. It also provides the check against an Unsupported
1948          * type too.
1949          */
1950         /* Find the head of the ALLADDR chain */
1951         if (have_lock == 0) {
1952                 SCTP_INP_INFO_RLOCK();
1953         }
1954         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1955             SCTP_BASE_INFO(hashmark))];
1956         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1957
1958         /*
1959          * If the TCP model exists it could be that the main listening
1960          * endpoint is gone but there still exists a connected socket for
1961          * this guy. If so we can return the first one that we find. This
1962          * may NOT be the correct one so the caller should be wary on the
1963          * returned INP. Currently the only caller that sets find_tcp_pool
1964          * is in bindx where we are verifying that a user CAN bind the
1965          * address. He either has bound it already, or someone else has, or
1966          * its open to bind, so this is good enough.
1967          */
1968         if (inp == NULL && find_tcp_pool) {
1969                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1970                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1971                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1972                         if (inp) {
1973                                 break;
1974                         }
1975                 }
1976         }
1977         if (inp) {
1978                 SCTP_INP_INCR_REF(inp);
1979         }
1980         if (have_lock == 0) {
1981                 SCTP_INP_INFO_RUNLOCK();
1982         }
1983         return (inp);
1984 }
1985
1986
1987 /*
1988  * Find an association for an endpoint with the pointer to whom you want to
1989  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1990  * need to change the *to to some other struct like a mbuf...
1991  */
1992 struct sctp_tcb *
1993 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
1994     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1995     uint32_t vrf_id)
1996 {
1997         struct sctp_inpcb *inp = NULL;
1998         struct sctp_tcb *stcb;
1999
2000         SCTP_INP_INFO_RLOCK();
2001         if (find_tcp_pool) {
2002                 if (inp_p != NULL) {
2003                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2004                             vrf_id);
2005                 } else {
2006                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2007                             vrf_id);
2008                 }
2009                 if (stcb != NULL) {
2010                         SCTP_INP_INFO_RUNLOCK();
2011                         return (stcb);
2012                 }
2013         }
2014         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2015         if (inp_p != NULL) {
2016                 *inp_p = inp;
2017         }
2018         SCTP_INP_INFO_RUNLOCK();
2019         if (inp == NULL) {
2020                 return (NULL);
2021         }
2022         /*
2023          * ok, we have an endpoint, now lets find the assoc for it (if any)
2024          * we now place the source address or from in the to of the find
2025          * endpoint call. Since in reality this chain is used from the
2026          * inbound packet side.
2027          */
2028         if (inp_p != NULL) {
2029                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2030                     NULL);
2031         } else {
2032                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2033                     NULL);
2034         }
2035         return (stcb);
2036 }
2037
2038
2039 /*
2040  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2041  * find all addresses that the sender has specified in any address list. Each
2042  * address will be used to lookup the TCB and see if one exits.
2043  */
2044 static struct sctp_tcb *
2045 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2046     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2047     struct sockaddr *dst)
2048 {
2049         struct sctp_paramhdr *phdr, param_buf;
2050 #if defined(INET) || defined(INET6)
2051         struct sctp_tcb *stcb;
2052         uint16_t ptype;
2053 #endif
2054         uint16_t plen;
2055 #ifdef INET
2056         struct sockaddr_in sin4;
2057 #endif
2058 #ifdef INET6
2059         struct sockaddr_in6 sin6;
2060 #endif
2061
2062 #ifdef INET
2063         memset(&sin4, 0, sizeof(sin4));
2064         sin4.sin_len = sizeof(sin4);
2065         sin4.sin_family = AF_INET;
2066         sin4.sin_port = sh->src_port;
2067 #endif
2068 #ifdef INET6
2069         memset(&sin6, 0, sizeof(sin6));
2070         sin6.sin6_len = sizeof(sin6);
2071         sin6.sin6_family = AF_INET6;
2072         sin6.sin6_port = sh->src_port;
2073 #endif
2074
2075         offset += sizeof(struct sctp_init_chunk);
2076
2077         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
2078         while (phdr != NULL) {
2079                 /* now we must see if we want the parameter */
2080 #if defined(INET) || defined(INET6)
2081                 ptype = ntohs(phdr->param_type);
2082 #endif
2083                 plen = ntohs(phdr->param_length);
2084                 if (plen == 0) {
2085                         break;
2086                 }
2087 #ifdef INET
2088                 if (ptype == SCTP_IPV4_ADDRESS &&
2089                     plen == sizeof(struct sctp_ipv4addr_param)) {
2090                         /* Get the rest of the address */
2091                         struct sctp_ipv4addr_param ip4_param, *p4;
2092
2093                         phdr = sctp_get_next_param(m, offset,
2094                             (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param));
2095                         if (phdr == NULL) {
2096                                 return (NULL);
2097                         }
2098                         p4 = (struct sctp_ipv4addr_param *)phdr;
2099                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2100                         /* look it up */
2101                         stcb = sctp_findassociation_ep_addr(inp_p,
2102                             (struct sockaddr *)&sin4, netp, dst, NULL);
2103                         if (stcb != NULL) {
2104                                 return (stcb);
2105                         }
2106                 }
2107 #endif
2108 #ifdef INET6
2109                 if (ptype == SCTP_IPV6_ADDRESS &&
2110                     plen == sizeof(struct sctp_ipv6addr_param)) {
2111                         /* Get the rest of the address */
2112                         struct sctp_ipv6addr_param ip6_param, *p6;
2113
2114                         phdr = sctp_get_next_param(m, offset,
2115                             (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param));
2116                         if (phdr == NULL) {
2117                                 return (NULL);
2118                         }
2119                         p6 = (struct sctp_ipv6addr_param *)phdr;
2120                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2121                         /* look it up */
2122                         stcb = sctp_findassociation_ep_addr(inp_p,
2123                             (struct sockaddr *)&sin6, netp, dst, NULL);
2124                         if (stcb != NULL) {
2125                                 return (stcb);
2126                         }
2127                 }
2128 #endif
2129                 offset += SCTP_SIZE32(plen);
2130                 phdr = sctp_get_next_param(m, offset, &param_buf,
2131                     sizeof(param_buf));
2132         }
2133         return (NULL);
2134 }
2135
2136 static struct sctp_tcb *
2137 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2138     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2139     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2140 {
2141         /*
2142          * Use my vtag to hash. If we find it we then verify the source addr
2143          * is in the assoc. If all goes well we save a bit on rec of a
2144          * packet.
2145          */
2146         struct sctpasochead *head;
2147         struct sctp_nets *net;
2148         struct sctp_tcb *stcb;
2149
2150         SCTP_INP_INFO_RLOCK();
2151         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2152             SCTP_BASE_INFO(hashasocmark))];
2153         LIST_FOREACH(stcb, head, sctp_asocs) {
2154                 SCTP_INP_RLOCK(stcb->sctp_ep);
2155                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2156                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2157                         continue;
2158                 }
2159                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2160                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2161                         continue;
2162                 }
2163                 SCTP_TCB_LOCK(stcb);
2164                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2165                 if (stcb->asoc.my_vtag == vtag) {
2166                         /* candidate */
2167                         if (stcb->rport != rport) {
2168                                 SCTP_TCB_UNLOCK(stcb);
2169                                 continue;
2170                         }
2171                         if (stcb->sctp_ep->sctp_lport != lport) {
2172                                 SCTP_TCB_UNLOCK(stcb);
2173                                 continue;
2174                         }
2175                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2176                                 SCTP_TCB_UNLOCK(stcb);
2177                                 continue;
2178                         }
2179                         /* RRS:Need toaddr check here */
2180                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2181                                 /* Endpoint does not own this address */
2182                                 SCTP_TCB_UNLOCK(stcb);
2183                                 continue;
2184                         }
2185                         if (remote_tag) {
2186                                 /*
2187                                  * If we have both vtags that's all we match
2188                                  * on
2189                                  */
2190                                 if (stcb->asoc.peer_vtag == remote_tag) {
2191                                         /*
2192                                          * If both tags match we consider it
2193                                          * conclusive and check NO
2194                                          * source/destination addresses
2195                                          */
2196                                         goto conclusive;
2197                                 }
2198                         }
2199                         if (skip_src_check) {
2200                 conclusive:
2201                                 if (from) {
2202                                         *netp = sctp_findnet(stcb, from);
2203                                 } else {
2204                                         *netp = NULL;   /* unknown */
2205                                 }
2206                                 if (inp_p)
2207                                         *inp_p = stcb->sctp_ep;
2208                                 SCTP_INP_INFO_RUNLOCK();
2209                                 return (stcb);
2210                         }
2211                         net = sctp_findnet(stcb, from);
2212                         if (net) {
2213                                 /* yep its him. */
2214                                 *netp = net;
2215                                 SCTP_STAT_INCR(sctps_vtagexpress);
2216                                 *inp_p = stcb->sctp_ep;
2217                                 SCTP_INP_INFO_RUNLOCK();
2218                                 return (stcb);
2219                         } else {
2220                                 /*
2221                                  * not him, this should only happen in rare
2222                                  * cases so I peg it.
2223                                  */
2224                                 SCTP_STAT_INCR(sctps_vtagbogus);
2225                         }
2226                 }
2227                 SCTP_TCB_UNLOCK(stcb);
2228         }
2229         SCTP_INP_INFO_RUNLOCK();
2230         return (NULL);
2231 }
2232
2233
2234 /*
2235  * Find an association with the pointer to the inbound IP packet. This can be
2236  * a IPv4 or IPv6 packet.
2237  */
2238 struct sctp_tcb *
2239 sctp_findassociation_addr(struct mbuf *m, int offset,
2240     struct sockaddr *src, struct sockaddr *dst,
2241     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2242     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2243 {
2244         struct sctp_tcb *stcb;
2245         struct sctp_inpcb *inp;
2246
2247         if (sh->v_tag) {
2248                 /* we only go down this path if vtag is non-zero */
2249                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2250                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2251                 if (stcb) {
2252                         return (stcb);
2253                 }
2254         }
2255
2256         if (inp_p) {
2257                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2258                     1, vrf_id);
2259                 inp = *inp_p;
2260         } else {
2261                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2262                     1, vrf_id);
2263         }
2264         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2265         if (stcb == NULL && inp) {
2266                 /* Found a EP but not this address */
2267                 if ((ch->chunk_type == SCTP_INITIATION) ||
2268                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2269                         /*-
2270                          * special hook, we do NOT return linp or an
2271                          * association that is linked to an existing
2272                          * association that is under the TCP pool (i.e. no
2273                          * listener exists). The endpoint finding routine
2274                          * will always find a listener before examining the
2275                          * TCP pool.
2276                          */
2277                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2278                                 if (inp_p) {
2279                                         *inp_p = NULL;
2280                                 }
2281                                 return (NULL);
2282                         }
2283                         stcb = sctp_findassociation_special_addr(m,
2284                             offset, sh, &inp, netp, dst);
2285                         if (inp_p != NULL) {
2286                                 *inp_p = inp;
2287                         }
2288                 }
2289         }
2290         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2291         return (stcb);
2292 }
2293
2294 /*
2295  * lookup an association by an ASCONF lookup address.
2296  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2297  */
2298 struct sctp_tcb *
2299 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2300     struct sockaddr *dst, struct sctphdr *sh,
2301     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2302 {
2303         struct sctp_tcb *stcb;
2304         union sctp_sockstore remote_store;
2305         struct sctp_paramhdr param_buf, *phdr;
2306         int ptype;
2307         int zero_address = 0;
2308 #ifdef INET
2309         struct sockaddr_in *sin;
2310 #endif
2311 #ifdef INET6
2312         struct sockaddr_in6 *sin6;
2313 #endif
2314
2315         memset(&remote_store, 0, sizeof(remote_store));
2316         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2317             &param_buf, sizeof(struct sctp_paramhdr));
2318         if (phdr == NULL) {
2319                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2320                     __func__);
2321                 return NULL;
2322         }
2323         ptype = (int)((uint32_t)ntohs(phdr->param_type));
2324         /* get the correlation address */
2325         switch (ptype) {
2326 #ifdef INET6
2327         case SCTP_IPV6_ADDRESS:
2328                 {
2329                         /* ipv6 address param */
2330                         struct sctp_ipv6addr_param *p6, p6_buf;
2331
2332                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2333                                 return NULL;
2334                         }
2335                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2336                             offset + sizeof(struct sctp_asconf_chunk),
2337                             &p6_buf.ph, sizeof(p6_buf));
2338                         if (p6 == NULL) {
2339                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2340                                     __func__);
2341                                 return (NULL);
2342                         }
2343                         sin6 = &remote_store.sin6;
2344                         sin6->sin6_family = AF_INET6;
2345                         sin6->sin6_len = sizeof(*sin6);
2346                         sin6->sin6_port = sh->src_port;
2347                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2348                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2349                                 zero_address = 1;
2350                         break;
2351                 }
2352 #endif
2353 #ifdef INET
2354         case SCTP_IPV4_ADDRESS:
2355                 {
2356                         /* ipv4 address param */
2357                         struct sctp_ipv4addr_param *p4, p4_buf;
2358
2359                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2360                                 return NULL;
2361                         }
2362                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2363                             offset + sizeof(struct sctp_asconf_chunk),
2364                             &p4_buf.ph, sizeof(p4_buf));
2365                         if (p4 == NULL) {
2366                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2367                                     __func__);
2368                                 return (NULL);
2369                         }
2370                         sin = &remote_store.sin;
2371                         sin->sin_family = AF_INET;
2372                         sin->sin_len = sizeof(*sin);
2373                         sin->sin_port = sh->src_port;
2374                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2375                         if (sin->sin_addr.s_addr == INADDR_ANY)
2376                                 zero_address = 1;
2377                         break;
2378                 }
2379 #endif
2380         default:
2381                 /* invalid address param type */
2382                 return NULL;
2383         }
2384
2385         if (zero_address) {
2386                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2387                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2388                 if (stcb != NULL) {
2389                         SCTP_INP_DECR_REF(*inp_p);
2390                 }
2391         } else {
2392                 stcb = sctp_findassociation_ep_addr(inp_p,
2393                     &remote_store.sa, netp,
2394                     dst, NULL);
2395         }
2396         return (stcb);
2397 }
2398
2399
2400 /*
2401  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2402  * addresses. This way if we don't get a bind we by default pick a ephemeral
2403  * port with all addresses bound.
2404  */
2405 int
2406 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2407 {
2408         /*
2409          * we get called when a new endpoint starts up. We need to allocate
2410          * the sctp_inpcb structure from the zone and init it. Mark it as
2411          * unbound and find a port that we can use as an ephemeral with
2412          * INADDR_ANY. If the user binds later no problem we can then add in
2413          * the specific addresses. And setup the default parameters for the
2414          * EP.
2415          */
2416         int i, error;
2417         struct sctp_inpcb *inp;
2418         struct sctp_pcb *m;
2419         struct timeval time;
2420         sctp_sharedkey_t *null_key;
2421
2422         error = 0;
2423
2424         SCTP_INP_INFO_WLOCK();
2425         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2426         if (inp == NULL) {
2427                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2428                 SCTP_INP_INFO_WUNLOCK();
2429                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2430                 return (ENOBUFS);
2431         }
2432         /* zap it */
2433         memset(inp, 0, sizeof(*inp));
2434
2435         /* bump generations */
2436         /* setup socket pointers */
2437         inp->sctp_socket = so;
2438         inp->ip_inp.inp.inp_socket = so;
2439         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2440 #ifdef INET6
2441         if (INP_SOCKAF(so) == AF_INET6) {
2442                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2443                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2444                 }
2445                 if (MODULE_GLOBAL(ip6_v6only)) {
2446                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2447                 }
2448         }
2449 #endif
2450         inp->sctp_associd_counter = 1;
2451         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2452         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2453         inp->max_cwnd = 0;
2454         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2455         inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable);
2456         inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable);
2457         inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable);
2458         inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable);
2459         inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2460         inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2461         inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2462         inp->idata_supported = 0;
2463
2464         inp->fibnum = so->so_fibnum;
2465         /* init the small hash table we use to track asocid <-> tcb */
2466         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2467         if (inp->sctp_asocidhash == NULL) {
2468                 crfree(inp->ip_inp.inp.inp_cred);
2469                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2470                 SCTP_INP_INFO_WUNLOCK();
2471                 return (ENOBUFS);
2472         }
2473         SCTP_INCR_EP_COUNT();
2474         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2475         SCTP_INP_INFO_WUNLOCK();
2476
2477         so->so_pcb = (caddr_t)inp;
2478
2479         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2480                 /* UDP style socket */
2481                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2482                     SCTP_PCB_FLAGS_UNBOUND);
2483                 /* Be sure it is NON-BLOCKING IO for UDP */
2484                 /* SCTP_SET_SO_NBIO(so); */
2485         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2486                 /* TCP style socket */
2487                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2488                     SCTP_PCB_FLAGS_UNBOUND);
2489                 /* Be sure we have blocking IO by default */
2490                 SOCK_LOCK(so);
2491                 SCTP_CLEAR_SO_NBIO(so);
2492                 SOCK_UNLOCK(so);
2493         } else {
2494                 /*
2495                  * unsupported socket type (RAW, etc)- in case we missed it
2496                  * in protosw
2497                  */
2498                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2499                 so->so_pcb = NULL;
2500                 crfree(inp->ip_inp.inp.inp_cred);
2501                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2502                 return (EOPNOTSUPP);
2503         }
2504         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2505                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2506                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2507         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2508                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2509                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2510         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2511                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2512                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2513         }
2514         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2515             &inp->sctp_hashmark);
2516         if (inp->sctp_tcbhash == NULL) {
2517                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2518                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2519                 so->so_pcb = NULL;
2520                 crfree(inp->ip_inp.inp.inp_cred);
2521                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2522                 return (ENOBUFS);
2523         }
2524         inp->def_vrf_id = vrf_id;
2525
2526         SCTP_INP_INFO_WLOCK();
2527         SCTP_INP_LOCK_INIT(inp);
2528         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2529         SCTP_INP_READ_INIT(inp);
2530         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2531         /* lock the new ep */
2532         SCTP_INP_WLOCK(inp);
2533
2534         /* add it to the info area */
2535         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2536         SCTP_INP_INFO_WUNLOCK();
2537
2538         TAILQ_INIT(&inp->read_queue);
2539         LIST_INIT(&inp->sctp_addr_list);
2540
2541         LIST_INIT(&inp->sctp_asoc_list);
2542
2543 #ifdef SCTP_TRACK_FREED_ASOCS
2544         /* TEMP CODE */
2545         LIST_INIT(&inp->sctp_asoc_free_list);
2546 #endif
2547         /* Init the timer structure for signature change */
2548         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2549         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2550
2551         /* now init the actual endpoint default data */
2552         m = &inp->sctp_ep;
2553
2554         /* setup the base timeout information */
2555         m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC);      /* needed ? */
2556         m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC);      /* needed ? */
2557         m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2558         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2559         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2560         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2561         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2562         /* all max/min max are in ms */
2563         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2564         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2565         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2566         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2567         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2568         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2569         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2570         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2571         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2572         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2573         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2574         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2575         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2576
2577         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2578         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2579         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2580         /* number of streams to pre-open on a association */
2581         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2582
2583         m->default_mtu = 0;
2584         /* Add adaptation cookie */
2585         m->adaptation_layer_indicator = 0;
2586         m->adaptation_layer_indicator_provided = 0;
2587
2588         /* seed random number generator */
2589         m->random_counter = 1;
2590         m->store_at = SCTP_SIGNATURE_SIZE;
2591         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2592         sctp_fill_random_store(m);
2593
2594         /* Minimum cookie size */
2595         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2596             sizeof(struct sctp_state_cookie);
2597         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2598
2599         /* Setup the initial secret */
2600         (void)SCTP_GETTIME_TIMEVAL(&time);
2601         m->time_of_secret_change = time.tv_sec;
2602
2603         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2604                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2605         }
2606         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2607
2608         /* How long is a cookie good for ? */
2609         m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2610         /*
2611          * Initialize authentication parameters
2612          */
2613         m->local_hmacs = sctp_default_supported_hmaclist();
2614         m->local_auth_chunks = sctp_alloc_chunklist();
2615         if (inp->asconf_supported) {
2616                 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2617                 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2618         }
2619         m->default_dscp = 0;
2620 #ifdef INET6
2621         m->default_flowlabel = 0;
2622 #endif
2623         m->port = 0;            /* encapsulation disabled by default */
2624         LIST_INIT(&m->shared_keys);
2625         /* add default NULL key as key id 0 */
2626         null_key = sctp_alloc_sharedkey();
2627         sctp_insert_sharedkey(&m->shared_keys, null_key);
2628         SCTP_INP_WUNLOCK(inp);
2629 #ifdef SCTP_LOG_CLOSING
2630         sctp_log_closing(inp, NULL, 12);
2631 #endif
2632         return (error);
2633 }
2634
2635
2636 void
2637 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2638     struct sctp_tcb *stcb)
2639 {
2640         struct sctp_nets *net;
2641         uint16_t lport, rport;
2642         struct sctppcbhead *head;
2643         struct sctp_laddr *laddr, *oladdr;
2644
2645         atomic_add_int(&stcb->asoc.refcnt, 1);
2646         SCTP_TCB_UNLOCK(stcb);
2647         SCTP_INP_INFO_WLOCK();
2648         SCTP_INP_WLOCK(old_inp);
2649         SCTP_INP_WLOCK(new_inp);
2650         SCTP_TCB_LOCK(stcb);
2651         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2652
2653         new_inp->sctp_ep.time_of_secret_change =
2654             old_inp->sctp_ep.time_of_secret_change;
2655         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2656             sizeof(old_inp->sctp_ep.secret_key));
2657         new_inp->sctp_ep.current_secret_number =
2658             old_inp->sctp_ep.current_secret_number;
2659         new_inp->sctp_ep.last_secret_number =
2660             old_inp->sctp_ep.last_secret_number;
2661         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2662
2663         /* make it so new data pours into the new socket */
2664         stcb->sctp_socket = new_inp->sctp_socket;
2665         stcb->sctp_ep = new_inp;
2666
2667         /* Copy the port across */
2668         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2669         rport = stcb->rport;
2670         /* Pull the tcb from the old association */
2671         LIST_REMOVE(stcb, sctp_tcbhash);
2672         LIST_REMOVE(stcb, sctp_tcblist);
2673         if (stcb->asoc.in_asocid_hash) {
2674                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2675         }
2676         /* Now insert the new_inp into the TCP connected hash */
2677         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2678
2679         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2680         /* Its safe to access */
2681         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2682
2683         /* Now move the tcb into the endpoint list */
2684         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2685         /*
2686          * Question, do we even need to worry about the ep-hash since we
2687          * only have one connection? Probably not :> so lets get rid of it
2688          * and not suck up any kernel memory in that.
2689          */
2690         if (stcb->asoc.in_asocid_hash) {
2691                 struct sctpasochead *lhd;
2692
2693                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2694                     new_inp->hashasocidmark)];
2695                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2696         }
2697         /* Ok. Let's restart timer. */
2698         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2699                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2700                     stcb, net);
2701         }
2702
2703         SCTP_INP_INFO_WUNLOCK();
2704         if (new_inp->sctp_tcbhash != NULL) {
2705                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2706                 new_inp->sctp_tcbhash = NULL;
2707         }
2708         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2709                 /* Subset bound, so copy in the laddr list from the old_inp */
2710                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2711                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2712                         if (laddr == NULL) {
2713                                 /*
2714                                  * Gak, what can we do? This assoc is really
2715                                  * HOSED. We probably should send an abort
2716                                  * here.
2717                                  */
2718                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2719                                 continue;
2720                         }
2721                         SCTP_INCR_LADDR_COUNT();
2722                         memset(laddr, 0, sizeof(*laddr));
2723                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2724                         laddr->ifa = oladdr->ifa;
2725                         atomic_add_int(&laddr->ifa->refcount, 1);
2726                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2727                             sctp_nxt_addr);
2728                         new_inp->laddr_count++;
2729                         if (oladdr == stcb->asoc.last_used_address) {
2730                                 stcb->asoc.last_used_address = laddr;
2731                         }
2732                 }
2733         }
2734         /*
2735          * Now any running timers need to be adjusted since we really don't
2736          * care if they are running or not just blast in the new_inp into
2737          * all of them.
2738          */
2739
2740         stcb->asoc.dack_timer.ep = (void *)new_inp;
2741         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2742         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2743         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2744         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2745         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2746         /* now what about the nets? */
2747         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2748                 net->pmtu_timer.ep = (void *)new_inp;
2749                 net->hb_timer.ep = (void *)new_inp;
2750                 net->rxt_timer.ep = (void *)new_inp;
2751         }
2752         SCTP_INP_WUNLOCK(new_inp);
2753         SCTP_INP_WUNLOCK(old_inp);
2754 }
2755
2756 /*
2757  * insert an laddr entry with the given ifa for the desired list
2758  */
2759 static int
2760 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2761 {
2762         struct sctp_laddr *laddr;
2763
2764         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2765         if (laddr == NULL) {
2766                 /* out of memory? */
2767                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2768                 return (EINVAL);
2769         }
2770         SCTP_INCR_LADDR_COUNT();
2771         memset(laddr, 0, sizeof(*laddr));
2772         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2773         laddr->ifa = ifa;
2774         laddr->action = act;
2775         atomic_add_int(&ifa->refcount, 1);
2776         /* insert it */
2777         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2778
2779         return (0);
2780 }
2781
2782 /*
2783  * Remove an laddr entry from the local address list (on an assoc)
2784  */
2785 static void
2786 sctp_remove_laddr(struct sctp_laddr *laddr)
2787 {
2788
2789         /* remove from the list */
2790         LIST_REMOVE(laddr, sctp_nxt_addr);
2791         sctp_free_ifa(laddr->ifa);
2792         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2793         SCTP_DECR_LADDR_COUNT();
2794 }
2795
2796
2797
2798 /* sctp_ifap is used to bypass normal local address validation checks */
2799 int
2800 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2801     struct sctp_ifa *sctp_ifap, struct thread *p)
2802 {
2803         /* bind a ep to a socket address */
2804         struct sctppcbhead *head;
2805         struct sctp_inpcb *inp, *inp_tmp;
2806         struct inpcb *ip_inp;
2807         int port_reuse_active = 0;
2808         int bindall;
2809         uint16_t lport;
2810         int error;
2811         uint32_t vrf_id;
2812
2813         lport = 0;
2814         bindall = 1;
2815         inp = (struct sctp_inpcb *)so->so_pcb;
2816         ip_inp = (struct inpcb *)so->so_pcb;
2817 #ifdef SCTP_DEBUG
2818         if (addr) {
2819                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2820                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2821                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2822                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2823         }
2824 #endif
2825         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2826                 /* already did a bind, subsequent binds NOT allowed ! */
2827                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2828                 return (EINVAL);
2829         }
2830 #ifdef INVARIANTS
2831         if (p == NULL)
2832                 panic("null proc/thread");
2833 #endif
2834         if (addr != NULL) {
2835                 switch (addr->sa_family) {
2836 #ifdef INET
2837                 case AF_INET:
2838                         {
2839                                 struct sockaddr_in *sin;
2840
2841                                 /* IPV6_V6ONLY socket? */
2842                                 if (SCTP_IPV6_V6ONLY(inp)) {
2843                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2844                                         return (EINVAL);
2845                                 }
2846                                 if (addr->sa_len != sizeof(*sin)) {
2847                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2848                                         return (EINVAL);
2849                                 }
2850
2851                                 sin = (struct sockaddr_in *)addr;
2852                                 lport = sin->sin_port;
2853                                 /*
2854                                  * For LOOPBACK the prison_local_ip4() call
2855                                  * will transmute the ip address to the
2856                                  * proper value.
2857                                  */
2858                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2859                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2860                                         return (error);
2861                                 }
2862                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2863                                         bindall = 0;
2864                                 }
2865                                 break;
2866                         }
2867 #endif
2868 #ifdef INET6
2869                 case AF_INET6:
2870                         {
2871                                 /*
2872                                  * Only for pure IPv6 Address. (No IPv4
2873                                  * Mapped!)
2874                                  */
2875                                 struct sockaddr_in6 *sin6;
2876
2877                                 sin6 = (struct sockaddr_in6 *)addr;
2878
2879                                 if (addr->sa_len != sizeof(*sin6)) {
2880                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2881                                         return (EINVAL);
2882                                 }
2883                                 lport = sin6->sin6_port;
2884                                 /*
2885                                  * For LOOPBACK the prison_local_ip6() call
2886                                  * will transmute the ipv6 address to the
2887                                  * proper value.
2888                                  */
2889                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2890                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2891                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2892                                         return (error);
2893                                 }
2894                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2895                                         bindall = 0;
2896                                         /* KAME hack: embed scopeid */
2897                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2898                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2899                                                 return (EINVAL);
2900                                         }
2901                                 }
2902                                 /* this must be cleared for ifa_ifwithaddr() */
2903                                 sin6->sin6_scope_id = 0;
2904                                 break;
2905                         }
2906 #endif
2907                 default:
2908                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2909                         return (EAFNOSUPPORT);
2910                 }
2911         }
2912         SCTP_INP_INFO_WLOCK();
2913         SCTP_INP_WLOCK(inp);
2914         /* Setup a vrf_id to be the default for the non-bind-all case. */
2915         vrf_id = inp->def_vrf_id;
2916
2917         /* increase our count due to the unlock we do */
2918         SCTP_INP_INCR_REF(inp);
2919         if (lport) {
2920                 /*
2921                  * Did the caller specify a port? if so we must see if an ep
2922                  * already has this one bound.
2923                  */
2924                 /* got to be root to get at low ports */
2925                 if (ntohs(lport) < IPPORT_RESERVED) {
2926                         if ((p != NULL) && ((error =
2927                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2928                             ) != 0)) {
2929                                 SCTP_INP_DECR_REF(inp);
2930                                 SCTP_INP_WUNLOCK(inp);
2931                                 SCTP_INP_INFO_WUNLOCK();
2932                                 return (error);
2933                         }
2934                 }
2935                 SCTP_INP_WUNLOCK(inp);
2936                 if (bindall) {
2937                         vrf_id = inp->def_vrf_id;
2938                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2939                         if (inp_tmp != NULL) {
2940                                 /*
2941                                  * lock guy returned and lower count note
2942                                  * that we are not bound so inp_tmp should
2943                                  * NEVER be inp. And it is this inp
2944                                  * (inp_tmp) that gets the reference bump,
2945                                  * so we must lower it.
2946                                  */
2947                                 SCTP_INP_DECR_REF(inp_tmp);
2948                                 /* unlock info */
2949                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2950                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2951                                         /*
2952                                          * Ok, must be one-2-one and
2953                                          * allowing port re-use
2954                                          */
2955                                         port_reuse_active = 1;
2956                                         goto continue_anyway;
2957                                 }
2958                                 SCTP_INP_DECR_REF(inp);
2959                                 SCTP_INP_INFO_WUNLOCK();
2960                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2961                                 return (EADDRINUSE);
2962                         }
2963                 } else {
2964                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2965                         if (inp_tmp != NULL) {
2966                                 /*
2967                                  * lock guy returned and lower count note
2968                                  * that we are not bound so inp_tmp should
2969                                  * NEVER be inp. And it is this inp
2970                                  * (inp_tmp) that gets the reference bump,
2971                                  * so we must lower it.
2972                                  */
2973                                 SCTP_INP_DECR_REF(inp_tmp);
2974                                 /* unlock info */
2975                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2976                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2977                                         /*
2978                                          * Ok, must be one-2-one and
2979                                          * allowing port re-use
2980                                          */
2981                                         port_reuse_active = 1;
2982                                         goto continue_anyway;
2983                                 }
2984                                 SCTP_INP_DECR_REF(inp);
2985                                 SCTP_INP_INFO_WUNLOCK();
2986                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2987                                 return (EADDRINUSE);
2988                         }
2989                 }
2990 continue_anyway:
2991                 SCTP_INP_WLOCK(inp);
2992                 if (bindall) {
2993                         /* verify that no lport is not used by a singleton */
2994                         if ((port_reuse_active == 0) &&
2995                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
2996                                 /* Sorry someone already has this one bound */
2997                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2998                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2999                                         port_reuse_active = 1;
3000                                 } else {
3001                                         SCTP_INP_DECR_REF(inp);
3002                                         SCTP_INP_WUNLOCK(inp);
3003                                         SCTP_INP_INFO_WUNLOCK();
3004                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3005                                         return (EADDRINUSE);
3006                                 }
3007                         }
3008                 }
3009         } else {
3010                 uint16_t first, last, candidate;
3011                 uint16_t count;
3012                 int done;
3013
3014                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3015                         first = MODULE_GLOBAL(ipport_hifirstauto);
3016                         last = MODULE_GLOBAL(ipport_hilastauto);
3017                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3018                         if (p && (error =
3019                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3020                             )) {
3021                                 SCTP_INP_DECR_REF(inp);
3022                                 SCTP_INP_WUNLOCK(inp);
3023                                 SCTP_INP_INFO_WUNLOCK();
3024                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3025                                 return (error);
3026                         }
3027                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3028                         last = MODULE_GLOBAL(ipport_lowlastauto);
3029                 } else {
3030                         first = MODULE_GLOBAL(ipport_firstauto);
3031                         last = MODULE_GLOBAL(ipport_lastauto);
3032                 }
3033                 if (first > last) {
3034                         uint16_t temp;
3035
3036                         temp = first;
3037                         first = last;
3038                         last = temp;
3039                 }
3040                 count = last - first + 1;       /* number of candidates */
3041                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3042
3043                 done = 0;
3044                 while (!done) {
3045                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3046                                 done = 1;
3047                         }
3048                         if (!done) {
3049                                 if (--count == 0) {
3050                                         SCTP_INP_DECR_REF(inp);
3051                                         SCTP_INP_WUNLOCK(inp);
3052                                         SCTP_INP_INFO_WUNLOCK();
3053                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3054                                         return (EADDRINUSE);
3055                                 }
3056                                 if (candidate == last)
3057                                         candidate = first;
3058                                 else
3059                                         candidate = candidate + 1;
3060                         }
3061                 }
3062                 lport = htons(candidate);
3063         }
3064         SCTP_INP_DECR_REF(inp);
3065         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3066             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3067                 /*
3068                  * this really should not happen. The guy did a non-blocking
3069                  * bind and then did a close at the same time.
3070                  */
3071                 SCTP_INP_WUNLOCK(inp);
3072                 SCTP_INP_INFO_WUNLOCK();
3073                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3074                 return (EINVAL);
3075         }
3076         /* ok we look clear to give out this port, so lets setup the binding */
3077         if (bindall) {
3078                 /* binding to all addresses, so just set in the proper flags */
3079                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3080                 /* set the automatic addr changes from kernel flag */
3081                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3082                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3083                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3084                 } else {
3085                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3086                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3087                 }
3088                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3089                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3090                 } else {
3091                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3092                 }
3093                 /*
3094                  * set the automatic mobility_base from kernel flag (by
3095                  * micchie)
3096                  */
3097                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3098                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3099                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3100                 } else {
3101                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3102                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3103                 }
3104                 /*
3105                  * set the automatic mobility_fasthandoff from kernel flag
3106                  * (by micchie)
3107                  */
3108                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3109                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3110                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3111                 } else {
3112                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3113                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3114                 }
3115         } else {
3116                 /*
3117                  * bind specific, make sure flags is off and add a new
3118                  * address structure to the sctp_addr_list inside the ep
3119                  * structure.
3120                  *
3121                  * We will need to allocate one and insert it at the head.
3122                  * The socketopt call can just insert new addresses in there
3123                  * as well. It will also have to do the embed scope kame
3124                  * hack too (before adding).
3125                  */
3126                 struct sctp_ifa *ifa;
3127                 union sctp_sockstore store;
3128
3129                 memset(&store, 0, sizeof(store));
3130                 switch (addr->sa_family) {
3131 #ifdef INET
3132                 case AF_INET:
3133                         memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3134                         store.sin.sin_port = 0;
3135                         break;
3136 #endif
3137 #ifdef INET6
3138                 case AF_INET6:
3139                         memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3140                         store.sin6.sin6_port = 0;
3141                         break;
3142 #endif
3143                 default:
3144                         break;
3145                 }
3146                 /*
3147                  * first find the interface with the bound address need to
3148                  * zero out the port to find the address! yuck! can't do
3149                  * this earlier since need port for sctp_pcb_findep()
3150                  */
3151                 if (sctp_ifap != NULL) {
3152                         ifa = sctp_ifap;
3153                 } else {
3154                         /*
3155                          * Note for BSD we hit here always other O/S's will
3156                          * pass things in via the sctp_ifap argument.
3157                          */
3158                         ifa = sctp_find_ifa_by_addr(&store.sa,
3159                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3160                 }
3161                 if (ifa == NULL) {
3162                         /* Can't find an interface with that address */
3163                         SCTP_INP_WUNLOCK(inp);
3164                         SCTP_INP_INFO_WUNLOCK();
3165                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3166                         return (EADDRNOTAVAIL);
3167                 }
3168 #ifdef INET6
3169                 if (addr->sa_family == AF_INET6) {
3170                         /* GAK, more FIXME IFA lock? */
3171                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3172                                 /* Can't bind a non-existent addr. */
3173                                 SCTP_INP_WUNLOCK(inp);
3174                                 SCTP_INP_INFO_WUNLOCK();
3175                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3176                                 return (EINVAL);
3177                         }
3178                 }
3179 #endif
3180                 /* we're not bound all */
3181                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3182                 /* allow bindx() to send ASCONF's for binding changes */
3183                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3184                 /* clear automatic addr changes from kernel flag */
3185                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3186
3187                 /* add this address to the endpoint list */
3188                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3189                 if (error != 0) {
3190                         SCTP_INP_WUNLOCK(inp);
3191                         SCTP_INP_INFO_WUNLOCK();
3192                         return (error);
3193                 }
3194                 inp->laddr_count++;
3195         }
3196         /* find the bucket */
3197         if (port_reuse_active) {
3198                 /* Put it into tcp 1-2-1 hash */
3199                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3200                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3201         } else {
3202                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3203         }
3204         /* put it in the bucket */
3205         LIST_INSERT_HEAD(head, inp, sctp_hash);
3206         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3207             (void *)head, ntohs(lport), port_reuse_active);
3208         /* set in the port */
3209         inp->sctp_lport = lport;
3210
3211         /* turn off just the unbound flag */
3212         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3213         SCTP_INP_WUNLOCK(inp);
3214         SCTP_INP_INFO_WUNLOCK();
3215         return (0);
3216 }
3217
3218
3219 static void
3220 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3221 {
3222         struct sctp_iterator *it, *nit;
3223
3224         /*
3225          * We enter with the only the ITERATOR_LOCK in place and a write
3226          * lock on the inp_info stuff.
3227          */
3228         it = sctp_it_ctl.cur_it;
3229         if (it && (it->vn != curvnet)) {
3230                 /* Its not looking at our VNET */
3231                 return;
3232         }
3233         if (it && (it->inp == inp)) {
3234                 /*
3235                  * This is tricky and we hold the iterator lock, but when it
3236                  * returns and gets the lock (when we release it) the
3237                  * iterator will try to operate on inp. We need to stop that
3238                  * from happening. But of course the iterator has a
3239                  * reference on the stcb and inp. We can mark it and it will
3240                  * stop.
3241                  *
3242                  * If its a single iterator situation, we set the end
3243                  * iterator flag. Otherwise we set the iterator to go to the
3244                  * next inp.
3245                  *
3246                  */
3247                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3248                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3249                 } else {
3250                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3251                 }
3252         }
3253         /*
3254          * Now go through and remove any single reference to our inp that
3255          * may be still pending on the list
3256          */
3257         SCTP_IPI_ITERATOR_WQ_LOCK();
3258         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3259                 if (it->vn != curvnet) {
3260                         continue;
3261                 }
3262                 if (it->inp == inp) {
3263                         /* This one points to me is it inp specific? */
3264                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3265                                 /* Remove and free this one */
3266                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3267                                     it, sctp_nxt_itr);
3268                                 if (it->function_atend != NULL) {
3269                                         (*it->function_atend) (it->pointer, it->val);
3270                                 }
3271                                 SCTP_FREE(it, SCTP_M_ITER);
3272                         } else {
3273                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3274                                 if (it->inp) {
3275                                         SCTP_INP_INCR_REF(it->inp);
3276                                 }
3277                         }
3278                         /*
3279                          * When its put in the refcnt is incremented so decr
3280                          * it
3281                          */
3282                         SCTP_INP_DECR_REF(inp);
3283                 }
3284         }
3285         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3286 }
3287
3288 /* release sctp_inpcb unbind the port */
3289 void
3290 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3291 {
3292         /*
3293          * Here we free a endpoint. We must find it (if it is in the Hash
3294          * table) and remove it from there. Then we must also find it in the
3295          * overall list and remove it from there. After all removals are
3296          * complete then any timer has to be stopped. Then start the actual
3297          * freeing. a) Any local lists. b) Any associations. c) The hash of
3298          * all associations. d) finally the ep itself.
3299          */
3300         struct sctp_tcb *asoc, *nasoc;
3301         struct sctp_laddr *laddr, *nladdr;
3302         struct inpcb *ip_pcb;
3303         struct socket *so;
3304         int being_refed = 0;
3305         struct sctp_queued_to_read *sq, *nsq;
3306         int cnt;
3307         sctp_sharedkey_t *shared_key, *nshared_key;
3308
3309
3310 #ifdef SCTP_LOG_CLOSING
3311         sctp_log_closing(inp, NULL, 0);
3312 #endif
3313         SCTP_ITERATOR_LOCK();
3314         /* mark any iterators on the list or being processed */
3315         sctp_iterator_inp_being_freed(inp);
3316         SCTP_ITERATOR_UNLOCK();
3317         so = inp->sctp_socket;
3318         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3319                 /* been here before.. eeks.. get out of here */
3320                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3321 #ifdef SCTP_LOG_CLOSING
3322                 sctp_log_closing(inp, NULL, 1);
3323 #endif
3324                 return;
3325         }
3326         SCTP_ASOC_CREATE_LOCK(inp);
3327         SCTP_INP_INFO_WLOCK();
3328
3329         SCTP_INP_WLOCK(inp);
3330         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3331                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3332                 /* socket is gone, so no more wakeups allowed */
3333                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3334                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3335                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3336
3337         }
3338         /* First time through we have the socket lock, after that no more. */
3339         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3340             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3341
3342         if (inp->control) {
3343                 sctp_m_freem(inp->control);
3344                 inp->control = NULL;
3345         }
3346         if (inp->pkt) {
3347                 sctp_m_freem(inp->pkt);
3348                 inp->pkt = NULL;
3349         }
3350         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3351                                          * here but I will be nice :> (i.e.
3352                                          * ip_pcb = ep;) */
3353         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3354                 int cnt_in_sd;
3355
3356                 cnt_in_sd = 0;
3357                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3358                         SCTP_TCB_LOCK(asoc);
3359                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3360                                 /* Skip guys being freed */
3361                                 cnt_in_sd++;
3362                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3363                                         /*
3364                                          * Special case - we did not start a
3365                                          * kill timer on the asoc due to it
3366                                          * was not closed. So go ahead and
3367                                          * start it now.
3368                                          */
3369                                         SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3370                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3371                                 }
3372                                 SCTP_TCB_UNLOCK(asoc);
3373                                 continue;
3374                         }
3375                         if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
3376                             (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3377                             (asoc->asoc.total_output_queue_size == 0)) {
3378                                 /*
3379                                  * If we have data in queue, we don't want
3380                                  * to just free since the app may have done,
3381                                  * send()/close or connect/send/close. And
3382                                  * it wants the data to get across first.
3383                                  */
3384                                 /* Just abandon things in the front states */
3385                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3386                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3387                                         cnt_in_sd++;
3388                                 }
3389                                 continue;
3390                         }
3391                         /* Disconnect the socket please */
3392                         asoc->sctp_socket = NULL;
3393                         SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET);
3394                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3395                             (asoc->asoc.control_pdapi) ||
3396                             (asoc->asoc.size_on_all_streams > 0) ||
3397                             (so && (so->so_rcv.sb_cc > 0))) {
3398                                 /* Left with Data unread */
3399                                 struct mbuf *op_err;
3400
3401                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3402                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3403                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3404                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3405                                 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3406                                     (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3407                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3408                                 }
3409                                 if (sctp_free_assoc(inp, asoc,
3410                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3411                                         cnt_in_sd++;
3412                                 }
3413                                 continue;
3414                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3415                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3416                             (asoc->asoc.stream_queue_cnt == 0)) {
3417                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3418                                         goto abort_anyway;
3419                                 }
3420                                 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3421                                     (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3422                                         struct sctp_nets *netp;
3423
3424                                         /*
3425                                          * there is nothing queued to send,
3426                                          * so I send shutdown
3427                                          */
3428                                         if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3429                                             (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3430                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3431                                         }
3432                                         SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
3433                                         sctp_stop_timers_for_shutdown(asoc);
3434                                         if (asoc->asoc.alternate) {
3435                                                 netp = asoc->asoc.alternate;
3436                                         } else {
3437                                                 netp = asoc->asoc.primary_destination;
3438                                         }
3439                                         sctp_send_shutdown(asoc, netp);
3440                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3441                                             netp);
3442                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
3443                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3444                                 }
3445                         } else {
3446                                 /* mark into shutdown pending */
3447                                 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
3448                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
3449                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3450                                         SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT);
3451                                 }
3452                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3453                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3454                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3455                                         struct mbuf *op_err;
3456
3457                         abort_anyway:
3458                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3459                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3460                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3461                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3462                                         if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3463                                             (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3464                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3465                                         }
3466                                         if (sctp_free_assoc(inp, asoc,
3467                                             SCTP_PCBFREE_NOFORCE,
3468                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3469                                                 cnt_in_sd++;
3470                                         }
3471                                         continue;
3472                                 } else {
3473                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3474                                 }
3475                         }
3476                         cnt_in_sd++;
3477                         SCTP_TCB_UNLOCK(asoc);
3478                 }
3479                 /* now is there some left in our SHUTDOWN state? */
3480                 if (cnt_in_sd) {
3481 #ifdef SCTP_LOG_CLOSING
3482                         sctp_log_closing(inp, NULL, 2);
3483 #endif
3484                         inp->sctp_socket = NULL;
3485                         SCTP_INP_WUNLOCK(inp);
3486                         SCTP_ASOC_CREATE_UNLOCK(inp);
3487                         SCTP_INP_INFO_WUNLOCK();
3488                         return;
3489                 }
3490         }
3491         inp->sctp_socket = NULL;
3492         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3493             SCTP_PCB_FLAGS_UNBOUND) {
3494                 /*
3495                  * ok, this guy has been bound. It's port is somewhere in
3496                  * the SCTP_BASE_INFO(hash table). Remove it!
3497                  */
3498                 LIST_REMOVE(inp, sctp_hash);
3499                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3500         }
3501
3502         /*
3503          * If there is a timer running to kill us, forget it, since it may
3504          * have a contest on the INP lock.. which would cause us to die ...
3505          */
3506         cnt = 0;
3507         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3508                 SCTP_TCB_LOCK(asoc);
3509                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3510                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3511                                 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3512                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3513                         }
3514                         cnt++;
3515                         SCTP_TCB_UNLOCK(asoc);
3516                         continue;
3517                 }
3518                 /* Free associations that are NOT killing us */
3519                 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
3520                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3521                         struct mbuf *op_err;
3522
3523                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3524                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3525                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3526                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3527                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3528                         cnt++;
3529                         SCTP_TCB_UNLOCK(asoc);
3530                         continue;
3531                 }
3532                 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3533                     (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3534                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3535                 }
3536                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3537                     SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3538                         cnt++;
3539                 }
3540         }
3541         if (cnt) {
3542                 /* Ok we have someone out there that will kill us */
3543 #ifdef SCTP_LOG_CLOSING
3544                 sctp_log_closing(inp, NULL, 3);
3545 #endif
3546                 SCTP_INP_WUNLOCK(inp);
3547                 SCTP_ASOC_CREATE_UNLOCK(inp);
3548                 SCTP_INP_INFO_WUNLOCK();
3549                 return;
3550         }
3551         if (SCTP_INP_LOCK_CONTENDED(inp))
3552                 being_refed++;
3553         if (SCTP_INP_READ_CONTENDED(inp))
3554                 being_refed++;
3555         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3556                 being_refed++;
3557
3558         if ((inp->refcount) ||
3559             (being_refed) ||
3560             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3561 #ifdef SCTP_LOG_CLOSING
3562                 sctp_log_closing(inp, NULL, 4);
3563 #endif
3564                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3565                 SCTP_INP_WUNLOCK(inp);
3566                 SCTP_ASOC_CREATE_UNLOCK(inp);
3567                 SCTP_INP_INFO_WUNLOCK();
3568                 return;
3569         }
3570         inp->sctp_ep.signature_change.type = 0;
3571         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3572         /*
3573          * Remove it from the list .. last thing we need a lock for.
3574          */
3575         LIST_REMOVE(inp, sctp_list);
3576         SCTP_INP_WUNLOCK(inp);
3577         SCTP_ASOC_CREATE_UNLOCK(inp);
3578         SCTP_INP_INFO_WUNLOCK();
3579         /*
3580          * Now we release all locks. Since this INP cannot be found anymore
3581          * except possibly by the kill timer that might be running. We call
3582          * the drain function here. It should hit the case were it sees the
3583          * ACTIVE flag cleared and exit out freeing us to proceed and
3584          * destroy everything.
3585          */
3586         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3587                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3588         } else {
3589                 /* Probably un-needed */
3590                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3591         }
3592
3593 #ifdef SCTP_LOG_CLOSING
3594         sctp_log_closing(inp, NULL, 5);
3595 #endif
3596
3597
3598         if ((inp->sctp_asocidhash) != NULL) {
3599                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3600                 inp->sctp_asocidhash = NULL;
3601         }
3602         /* sa_ignore FREED_MEMORY */
3603         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3604                 /* Its only abandoned if it had data left */
3605                 if (sq->length)
3606                         SCTP_STAT_INCR(sctps_left_abandon);
3607
3608                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3609                 sctp_free_remote_addr(sq->whoFrom);
3610                 if (so)
3611                         so->so_rcv.sb_cc -= sq->length;
3612                 if (sq->data) {
3613                         sctp_m_freem(sq->data);
3614                         sq->data = NULL;
3615                 }
3616                 /*
3617                  * no need to free the net count, since at this point all
3618                  * assoc's are gone.
3619                  */
3620                 sctp_free_a_readq(NULL, sq);
3621         }
3622         /* Now the sctp_pcb things */
3623         /*
3624          * free each asoc if it is not already closed/free. we can't use the
3625          * macro here since le_next will get freed as part of the
3626          * sctp_free_assoc() call.
3627          */
3628         if (ip_pcb->inp_options) {
3629                 (void)sctp_m_free(ip_pcb->inp_options);
3630                 ip_pcb->inp_options = 0;
3631         }
3632
3633
3634 #ifdef INET6
3635         if (ip_pcb->inp_vflag & INP_IPV6) {
3636                 ip6_freepcbopts(ip_pcb->in6p_outputopts);
3637         }
3638 #endif                          /* INET6 */
3639         ip_pcb->inp_vflag = 0;
3640         /* free up authentication fields */
3641         if (inp->sctp_ep.local_auth_chunks != NULL)
3642                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3643         if (inp->sctp_ep.local_hmacs != NULL)
3644                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3645
3646         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3647                 LIST_REMOVE(shared_key, next);
3648                 sctp_free_sharedkey(shared_key);
3649                 /* sa_ignore FREED_MEMORY */
3650         }
3651
3652         /*
3653          * if we have an address list the following will free the list of
3654          * ifaddr's that are set into this ep. Again macro limitations here,
3655          * since the LIST_FOREACH could be a bad idea.
3656          */
3657         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3658                 sctp_remove_laddr(laddr);
3659         }
3660
3661 #ifdef SCTP_TRACK_FREED_ASOCS
3662         /* TEMP CODE */
3663         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3664                 LIST_REMOVE(asoc, sctp_tcblist);
3665                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3666                 SCTP_DECR_ASOC_COUNT();
3667         }
3668         /* *** END TEMP CODE *** */
3669 #endif
3670         /* Now lets see about freeing the EP hash table. */
3671         if (inp->sctp_tcbhash != NULL) {
3672                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3673                 inp->sctp_tcbhash = NULL;
3674         }
3675         /* Now we must put the ep memory back into the zone pool */
3676         crfree(inp->ip_inp.inp.inp_cred);
3677         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3678         SCTP_INP_LOCK_DESTROY(inp);
3679         SCTP_INP_READ_DESTROY(inp);
3680         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3681         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3682         SCTP_DECR_EP_COUNT();
3683 }
3684
3685
3686 struct sctp_nets *
3687 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3688 {
3689         struct sctp_nets *net;
3690
3691         /* locate the address */
3692         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3693                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3694                         return (net);
3695         }
3696         return (NULL);
3697 }
3698
3699
3700 int
3701 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3702 {
3703         struct sctp_ifa *sctp_ifa;
3704
3705         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3706         if (sctp_ifa) {
3707                 return (1);
3708         } else {
3709                 return (0);
3710         }
3711 }
3712
3713 /*
3714  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3715  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3716  * stats of stuff.
3717  */
3718 int
3719 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3720     struct sctp_nets **netp, uint16_t port, int set_scope, int from)
3721 {
3722         /*
3723          * The following is redundant to the same lines in the
3724          * sctp_aloc_assoc() but is needed since others call the add address
3725          * function
3726          */
3727         struct sctp_nets *net, *netfirst;
3728         int addr_inscope;
3729
3730         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3731             from);
3732         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3733
3734         netfirst = sctp_findnet(stcb, newaddr);
3735         if (netfirst) {
3736                 /*
3737                  * Lie and return ok, we don't want to make the association
3738                  * go away for this behavior. It will happen in the TCP
3739                  * model in a connected socket. It does not reach the hash
3740                  * table until after the association is built so it can't be
3741                  * found. Mark as reachable, since the initial creation will
3742                  * have been cleared and the NOT_IN_ASSOC flag will have
3743                  * been added... and we don't want to end up removing it
3744                  * back out.
3745                  */
3746                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3747                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3748                             SCTP_ADDR_UNCONFIRMED);
3749                 } else {
3750                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3751                 }
3752
3753                 return (0);
3754         }
3755         addr_inscope = 1;
3756         switch (newaddr->sa_family) {
3757 #ifdef INET
3758         case AF_INET:
3759                 {
3760                         struct sockaddr_in *sin;
3761
3762                         sin = (struct sockaddr_in *)newaddr;
3763                         if (sin->sin_addr.s_addr == 0) {
3764                                 /* Invalid address */
3765                                 return (-1);
3766                         }
3767                         /* zero out the zero area */
3768                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3769
3770                         /* assure len is set */
3771                         sin->sin_len = sizeof(struct sockaddr_in);
3772                         if (set_scope) {
3773                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3774                                         stcb->asoc.scope.ipv4_local_scope = 1;
3775                                 }
3776                         } else {
3777                                 /* Validate the address is in scope */
3778                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3779                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3780                                         addr_inscope = 0;
3781                                 }
3782                         }
3783                         break;
3784                 }
3785 #endif
3786 #ifdef INET6
3787         case AF_INET6:
3788                 {
3789                         struct sockaddr_in6 *sin6;
3790
3791                         sin6 = (struct sockaddr_in6 *)newaddr;
3792                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3793                                 /* Invalid address */
3794                                 return (-1);
3795                         }
3796                         /* assure len is set */
3797                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3798                         if (set_scope) {
3799                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3800                                         stcb->asoc.scope.loopback_scope = 1;
3801                                         stcb->asoc.scope.local_scope = 0;
3802                                         stcb->asoc.scope.ipv4_local_scope = 1;
3803                                         stcb->asoc.scope.site_scope = 1;
3804                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3805                                         /*
3806                                          * If the new destination is a
3807                                          * LINK_LOCAL we must have common
3808                                          * site scope. Don't set the local
3809                                          * scope since we may not share all
3810                                          * links, only loopback can do this.
3811                                          * Links on the local network would
3812                                          * also be on our private network
3813                                          * for v4 too.
3814                                          */
3815                                         stcb->asoc.scope.ipv4_local_scope = 1;
3816                                         stcb->asoc.scope.site_scope = 1;
3817                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3818                                         /*
3819                                          * If the new destination is
3820                                          * SITE_LOCAL then we must have site
3821                                          * scope in common.
3822                                          */
3823                                         stcb->asoc.scope.site_scope = 1;
3824                                 }
3825                         } else {
3826                                 /* Validate the address is in scope */
3827                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3828                                     (stcb->asoc.scope.loopback_scope == 0)) {
3829                                         addr_inscope = 0;
3830                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3831                                     (stcb->asoc.scope.local_scope == 0)) {
3832                                         addr_inscope = 0;
3833                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3834                                     (stcb->asoc.scope.site_scope == 0)) {
3835                                         addr_inscope = 0;
3836                                 }
3837                         }
3838                         break;
3839                 }
3840 #endif
3841         default:
3842                 /* not supported family type */
3843                 return (-1);
3844         }
3845         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3846         if (net == NULL) {
3847                 return (-1);
3848         }
3849         SCTP_INCR_RADDR_COUNT();
3850         memset(net, 0, sizeof(struct sctp_nets));
3851         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3852         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3853         switch (newaddr->sa_family) {
3854 #ifdef INET
3855         case AF_INET:
3856                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3857                 break;
3858 #endif
3859 #ifdef INET6
3860         case AF_INET6:
3861                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3862                 break;
3863 #endif
3864         default:
3865                 break;
3866         }
3867         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3868         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3869                 stcb->asoc.scope.loopback_scope = 1;
3870                 stcb->asoc.scope.ipv4_local_scope = 1;
3871                 stcb->asoc.scope.local_scope = 0;
3872                 stcb->asoc.scope.site_scope = 1;
3873                 addr_inscope = 1;
3874         }
3875         net->failure_threshold = stcb->asoc.def_net_failure;
3876         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3877         if (addr_inscope == 0) {
3878                 net->dest_state = (SCTP_ADDR_REACHABLE |
3879                     SCTP_ADDR_OUT_OF_SCOPE);
3880         } else {
3881                 if (from == SCTP_ADDR_IS_CONFIRMED)
3882                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3883                         net->dest_state = SCTP_ADDR_REACHABLE;
3884                 else
3885                         net->dest_state = SCTP_ADDR_REACHABLE |
3886                             SCTP_ADDR_UNCONFIRMED;
3887         }
3888         /*
3889          * We set this to 0, the timer code knows that this means its an
3890          * initial value
3891          */
3892         net->rto_needed = 1;
3893         net->RTO = 0;
3894         net->RTO_measured = 0;
3895         stcb->asoc.numnets++;
3896         net->ref_count = 1;
3897         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3898         net->port = port;
3899         net->dscp = stcb->asoc.default_dscp;
3900 #ifdef INET6
3901         net->flowlabel = stcb->asoc.default_flowlabel;
3902 #endif
3903         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3904                 net->dest_state |= SCTP_ADDR_NOHB;
3905         } else {
3906                 net->dest_state &= ~SCTP_ADDR_NOHB;
3907         }
3908         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3909                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3910         } else {
3911                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3912         }
3913         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3914         /* Init the timer structure */
3915         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3916         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3917         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3918
3919         /* Now generate a route for this guy */
3920 #ifdef INET6
3921         /* KAME hack: embed scopeid */
3922         if (newaddr->sa_family == AF_INET6) {
3923                 struct sockaddr_in6 *sin6;
3924
3925                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3926                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3927                 sin6->sin6_scope_id = 0;
3928         }
3929 #endif
3930         SCTP_RTALLOC((sctp_route_t *)&net->ro,
3931             stcb->asoc.vrf_id,
3932             stcb->sctp_ep->fibnum);
3933
3934         net->src_addr_selected = 0;
3935         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3936                 /* Get source address */
3937                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3938                     stcb,
3939                     (sctp_route_t *)&net->ro,
3940                     net,
3941                     0,
3942                     stcb->asoc.vrf_id);
3943                 if (stcb->asoc.default_mtu > 0) {
3944                         net->mtu = stcb->asoc.default_mtu;
3945                         switch (net->ro._l_addr.sa.sa_family) {
3946 #ifdef INET
3947                         case AF_INET:
3948                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
3949                                 break;
3950 #endif
3951 #ifdef INET6
3952                         case AF_INET6:
3953                                 net->mtu += SCTP_MIN_OVERHEAD;
3954                                 break;
3955 #endif
3956                         default:
3957                                 break;
3958                         }
3959 #if defined(INET) || defined(INET6)
3960                         if (net->port) {
3961                                 net->mtu += (uint32_t)sizeof(struct udphdr);
3962                         }
3963 #endif
3964                 } else if (net->ro._s_addr != NULL) {
3965                         uint32_t imtu, rmtu, hcmtu;
3966
3967                         net->src_addr_selected = 1;
3968                         /* Now get the interface MTU */
3969                         if (net->ro._s_addr->ifn_p != NULL) {
3970                                 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3971                         } else {
3972                                 imtu = 0;
3973                         }
3974                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3975                         hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum);
3976                         net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu);
3977                         if (rmtu == 0) {
3978                                 /*
3979                                  * Start things off to match mtu of
3980                                  * interface please.
3981                                  */
3982                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3983                                     net->ro.ro_rt, net->mtu);
3984                         }
3985                 }
3986         }
3987         if (net->mtu == 0) {
3988                 if (stcb->asoc.default_mtu > 0) {
3989                         net->mtu = stcb->asoc.default_mtu;
3990                         switch (net->ro._l_addr.sa.sa_family) {
3991 #ifdef INET
3992                         case AF_INET:
3993                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
3994                                 break;
3995 #endif
3996 #ifdef INET6
3997                         case AF_INET6:
3998                                 net->mtu += SCTP_MIN_OVERHEAD;
3999                                 break;
4000 #endif
4001                         default:
4002                                 break;
4003                         }
4004 #if defined(INET) || defined(INET6)
4005                         if (net->port) {
4006                                 net->mtu += (uint32_t)sizeof(struct udphdr);
4007                         }
4008 #endif
4009                 } else {
4010                         switch (newaddr->sa_family) {
4011 #ifdef INET
4012                         case AF_INET:
4013                                 net->mtu = SCTP_DEFAULT_MTU;
4014                                 break;
4015 #endif
4016 #ifdef INET6
4017                         case AF_INET6:
4018                                 net->mtu = 1280;
4019                                 break;
4020 #endif
4021                         default:
4022                                 break;
4023                         }
4024                 }
4025         }
4026 #if defined(INET) || defined(INET6)
4027         if (net->port) {
4028                 net->mtu -= (uint32_t)sizeof(struct udphdr);
4029         }
4030 #endif
4031         if (from == SCTP_ALLOC_ASOC) {
4032                 stcb->asoc.smallest_mtu = net->mtu;
4033         }
4034         if (stcb->asoc.smallest_mtu > net->mtu) {
4035                 sctp_pathmtu_adjustment(stcb, net->mtu);
4036         }
4037 #ifdef INET6
4038         if (newaddr->sa_family == AF_INET6) {
4039                 struct sockaddr_in6 *sin6;
4040
4041                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4042                 (void)sa6_recoverscope(sin6);
4043         }
4044 #endif
4045
4046         /* JRS - Use the congestion control given in the CC module */
4047         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4048                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4049
4050         /*
4051          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4052          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4053          */
4054         net->find_pseudo_cumack = 1;
4055         net->find_rtx_pseudo_cumack = 1;
4056         /* Choose an initial flowid. */
4057         net->flowid = stcb->asoc.my_vtag ^
4058             ntohs(stcb->rport) ^
4059             ntohs(stcb->sctp_ep->sctp_lport);
4060         net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4061         if (netp) {
4062                 *netp = net;
4063         }
4064         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4065         if (net->ro.ro_rt == NULL) {
4066                 /* Since we have no route put it at the back */
4067                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4068         } else if (netfirst == NULL) {
4069                 /* We are the first one in the pool. */
4070                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4071         } else if (netfirst->ro.ro_rt == NULL) {
4072                 /*
4073                  * First one has NO route. Place this one ahead of the first
4074                  * one.
4075                  */
4076                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4077         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4078                 /*
4079                  * This one has a different interface than the one at the
4080                  * top of the list. Place it ahead.
4081                  */
4082                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4083         } else {
4084                 /*
4085                  * Ok we have the same interface as the first one. Move
4086                  * forward until we find either a) one with a NULL route...
4087                  * insert ahead of that b) one with a different ifp.. insert
4088                  * after that. c) end of the list.. insert at the tail.
4089                  */
4090                 struct sctp_nets *netlook;
4091
4092                 do {
4093                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4094                         if (netlook == NULL) {
4095                                 /* End of the list */
4096                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4097                                 break;
4098                         } else if (netlook->ro.ro_rt == NULL) {
4099                                 /* next one has NO route */
4100                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4101                                 break;
4102                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4103                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4104                                     net, sctp_next);
4105                                 break;
4106                         }
4107                         /* Shift forward */
4108                         netfirst = netlook;
4109                 } while (netlook != NULL);
4110         }
4111
4112         /* got to have a primary set */
4113         if (stcb->asoc.primary_destination == 0) {
4114                 stcb->asoc.primary_destination = net;
4115         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4116                     (net->ro.ro_rt) &&
4117             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4118                 /* No route to current primary adopt new primary */
4119                 stcb->asoc.primary_destination = net;
4120         }
4121         /* Validate primary is first */
4122         net = TAILQ_FIRST(&stcb->asoc.nets);
4123         if ((net != stcb->asoc.primary_destination) &&
4124             (stcb->asoc.primary_destination)) {
4125                 /*
4126                  * first one on the list is NOT the primary sctp_cmpaddr()
4127                  * is much more efficient if the primary is the first on the
4128                  * list, make it so.
4129                  */
4130                 TAILQ_REMOVE(&stcb->asoc.nets,
4131                     stcb->asoc.primary_destination, sctp_next);
4132                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4133                     stcb->asoc.primary_destination, sctp_next);
4134         }
4135         return (0);
4136 }
4137
4138
4139 static uint32_t
4140 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4141 {
4142         uint32_t id;
4143         struct sctpasochead *head;
4144         struct sctp_tcb *lstcb;
4145
4146 try_again:
4147         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4148                 /* TSNH */
4149                 return (0);
4150         }
4151         /*
4152          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4153          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4154          */
4155         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4156                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4157         }
4158         id = inp->sctp_associd_counter;
4159         inp->sctp_associd_counter++;
4160         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4161         if (lstcb) {
4162                 goto try_again;
4163         }
4164         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4165         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4166         stcb->asoc.in_asocid_hash = 1;
4167         return (id);
4168 }
4169
4170 /*
4171  * allocate an association and add it to the endpoint. The caller must be
4172  * careful to add all additional addresses once they are know right away or
4173  * else the assoc will be may experience a blackout scenario.
4174  */
4175 struct sctp_tcb *
4176 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4177     int *error, uint32_t override_tag, uint32_t vrf_id,
4178     uint16_t o_streams, uint16_t port,
4179     struct thread *p,
4180     int initialize_auth_params)
4181 {
4182         /* note the p argument is only valid in unbound sockets */
4183
4184         struct sctp_tcb *stcb;
4185         struct sctp_association *asoc;
4186         struct sctpasochead *head;
4187         uint16_t rport;
4188         int err;
4189
4190         /*
4191          * Assumption made here: Caller has done a
4192          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4193          * address does not exist already.
4194          */
4195         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4196                 /* Hit max assoc, sorry no more */
4197                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4198                 *error = ENOBUFS;
4199                 return (NULL);
4200         }
4201         if (firstaddr == NULL) {
4202                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4203                 *error = EINVAL;
4204                 return (NULL);
4205         }
4206         SCTP_INP_RLOCK(inp);
4207         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4208             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4209             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4210                 /*
4211                  * If its in the TCP pool, its NOT allowed to create an
4212                  * association. The parent listener needs to call
4213                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4214                  * off, or connected one does this.. its an error.
4215                  */
4216                 SCTP_INP_RUNLOCK(inp);
4217                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4218                 *error = EINVAL;
4219                 return (NULL);
4220         }
4221         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4222             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4223                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4224                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4225                         SCTP_INP_RUNLOCK(inp);
4226                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4227                         *error = EINVAL;
4228                         return (NULL);
4229                 }
4230         }
4231         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4232 #ifdef SCTP_DEBUG
4233         if (firstaddr) {
4234                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4235                 switch (firstaddr->sa_family) {
4236 #ifdef INET
4237                 case AF_INET:
4238                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4239                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4240                         break;
4241 #endif
4242 #ifdef INET6
4243                 case AF_INET6:
4244                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4245                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4246                         break;
4247 #endif
4248                 default:
4249                         break;
4250                 }
4251         } else {
4252                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4253         }
4254 #endif                          /* SCTP_DEBUG */
4255         switch (firstaddr->sa_family) {
4256 #ifdef INET
4257         case AF_INET:
4258                 {
4259                         struct sockaddr_in *sin;
4260
4261                         sin = (struct sockaddr_in *)firstaddr;
4262                         if ((ntohs(sin->sin_port) == 0) ||
4263                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4264                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4265                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4266                                 /* Invalid address */
4267                                 SCTP_INP_RUNLOCK(inp);
4268                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4269                                 *error = EINVAL;
4270                                 return (NULL);
4271                         }
4272                         rport = sin->sin_port;
4273                         break;
4274                 }
4275 #endif
4276 #ifdef INET6
4277         case AF_INET6:
4278                 {
4279                         struct sockaddr_in6 *sin6;
4280
4281                         sin6 = (struct sockaddr_in6 *)firstaddr;
4282                         if ((ntohs(sin6->sin6_port) == 0) ||
4283                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4284                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4285                                 /* Invalid address */
4286                                 SCTP_INP_RUNLOCK(inp);
4287                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4288                                 *error = EINVAL;
4289                                 return (NULL);
4290                         }
4291                         rport = sin6->sin6_port;
4292                         break;
4293                 }
4294 #endif
4295         default:
4296                 /* not supported family type */
4297                 SCTP_INP_RUNLOCK(inp);
4298                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4299                 *error = EINVAL;
4300                 return (NULL);
4301         }
4302         SCTP_INP_RUNLOCK(inp);
4303         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4304                 /*
4305                  * If you have not performed a bind, then we need to do the
4306                  * ephemeral bind for you.
4307                  */
4308                 if ((err = sctp_inpcb_bind(inp->sctp_socket, NULL, NULL, p))) {
4309                         /* bind error, probably perm */
4310                         *error = err;
4311                         return (NULL);
4312                 }
4313         }
4314         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4315         if (stcb == NULL) {
4316                 /* out of memory? */
4317                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4318                 *error = ENOMEM;
4319                 return (NULL);
4320         }
4321         SCTP_INCR_ASOC_COUNT();
4322
4323         memset(stcb, 0, sizeof(*stcb));
4324         asoc = &stcb->asoc;
4325
4326         SCTP_TCB_LOCK_INIT(stcb);
4327         SCTP_TCB_SEND_LOCK_INIT(stcb);
4328         stcb->rport = rport;
4329         /* setup back pointer's */
4330         stcb->sctp_ep = inp;
4331         stcb->sctp_socket = inp->sctp_socket;
4332         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
4333                 /* failed */
4334                 SCTP_TCB_LOCK_DESTROY(stcb);
4335                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4336                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4337                 SCTP_DECR_ASOC_COUNT();
4338                 *error = err;
4339                 return (NULL);
4340         }
4341         /* and the port */
4342         SCTP_INP_INFO_WLOCK();
4343         SCTP_INP_WLOCK(inp);
4344         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4345                 /* inpcb freed while alloc going on */
4346                 SCTP_TCB_LOCK_DESTROY(stcb);
4347                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4348                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4349                 SCTP_INP_WUNLOCK(inp);
4350                 SCTP_INP_INFO_WUNLOCK();
4351                 SCTP_DECR_ASOC_COUNT();
4352                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4353                 *error = EINVAL;
4354                 return (NULL);
4355         }
4356         SCTP_TCB_LOCK(stcb);
4357
4358         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4359         /* now that my_vtag is set, add it to the hash */
4360         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4361         /* put it in the bucket in the vtag hash of assoc's for the system */
4362         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4363         SCTP_INP_INFO_WUNLOCK();
4364
4365         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4366                 /* failure.. memory error? */
4367                 if (asoc->strmout) {
4368                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4369                         asoc->strmout = NULL;
4370                 }
4371                 if (asoc->mapping_array) {
4372                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4373                         asoc->mapping_array = NULL;
4374                 }
4375                 if (asoc->nr_mapping_array) {
4376                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4377                         asoc->nr_mapping_array = NULL;
4378                 }
4379                 SCTP_DECR_ASOC_COUNT();
4380                 SCTP_TCB_UNLOCK(stcb);
4381                 SCTP_TCB_LOCK_DESTROY(stcb);
4382                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4383                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4384                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4385                 SCTP_INP_WUNLOCK(inp);
4386                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4387                 *error = ENOBUFS;
4388                 return (NULL);
4389         }
4390         /* Init all the timers */
4391         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4392         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4393         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4394         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4395         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4396         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4397
4398         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4399         /* now file the port under the hash as well */
4400         if (inp->sctp_tcbhash != NULL) {
4401                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4402                     inp->sctp_hashmark)];
4403                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4404         }
4405         if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) {
4406                 sctp_initialize_auth_params(inp, stcb);
4407         }
4408         SCTP_INP_WUNLOCK(inp);
4409         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4410         return (stcb);
4411 }
4412
4413
4414 void
4415 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4416 {
4417         struct sctp_inpcb *inp;
4418         struct sctp_association *asoc;
4419
4420         inp = stcb->sctp_ep;
4421         asoc = &stcb->asoc;
4422         asoc->numnets--;
4423         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4424         if (net == asoc->primary_destination) {
4425                 /* Reset primary */
4426                 struct sctp_nets *lnet;
4427
4428                 lnet = TAILQ_FIRST(&asoc->nets);
4429                 /*
4430                  * Mobility adaptation Ideally, if deleted destination is
4431                  * the primary, it becomes a fast retransmission trigger by
4432                  * the subsequent SET PRIMARY. (by micchie)
4433                  */
4434                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4435                     SCTP_MOBILITY_BASE) ||
4436                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4437                     SCTP_MOBILITY_FASTHANDOFF)) {
4438                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4439                         if (asoc->deleted_primary != NULL) {
4440                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4441                                 goto out;
4442                         }
4443                         asoc->deleted_primary = net;
4444                         atomic_add_int(&net->ref_count, 1);
4445                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4446                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4447                         sctp_mobility_feature_on(stcb->sctp_ep,
4448                             SCTP_MOBILITY_PRIM_DELETED);
4449                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4450                             stcb->sctp_ep, stcb, NULL);
4451                 }
4452 out:
4453                 /* Try to find a confirmed primary */
4454                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4455         }
4456         if (net == asoc->last_data_chunk_from) {
4457                 /* Reset primary */
4458                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4459         }
4460         if (net == asoc->last_control_chunk_from) {
4461                 /* Clear net */
4462                 asoc->last_control_chunk_from = NULL;
4463         }
4464         if (net == stcb->asoc.alternate) {
4465                 sctp_free_remote_addr(stcb->asoc.alternate);
4466                 stcb->asoc.alternate = NULL;
4467         }
4468         sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
4469             SCTP_FROM_SCTP_PCB + SCTP_LOC_9);
4470         sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
4471             SCTP_FROM_SCTP_PCB + SCTP_LOC_10);
4472         net->dest_state |= SCTP_ADDR_BEING_DELETED;
4473         sctp_free_remote_addr(net);
4474 }
4475
4476 /*
4477  * remove a remote endpoint address from an association, it will fail if the
4478  * address does not exist.
4479  */
4480 int
4481 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4482 {
4483         /*
4484          * Here we need to remove a remote address. This is quite simple, we
4485          * first find it in the list of address for the association
4486          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4487          * on that item. Note we do not allow it to be removed if there are
4488          * no other addresses.
4489          */
4490         struct sctp_association *asoc;
4491         struct sctp_nets *net, *nnet;
4492
4493         asoc = &stcb->asoc;
4494
4495         /* locate the address */
4496         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4497                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4498                         continue;
4499                 }
4500                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4501                     remaddr)) {
4502                         /* we found the guy */
4503                         if (asoc->numnets < 2) {
4504                                 /* Must have at LEAST two remote addresses */
4505                                 return (-1);
4506                         } else {
4507                                 sctp_remove_net(stcb, net);
4508                                 return (0);
4509                         }
4510                 }
4511         }
4512         /* not found. */
4513         return (-2);
4514 }
4515
4516 void
4517 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4518 {
4519         struct sctpvtaghead *chain;
4520         struct sctp_tagblock *twait_block;
4521         int found = 0;
4522         int i;
4523
4524         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4525         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4526                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4527                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4528                             (twait_block->vtag_block[i].lport == lport) &&
4529                             (twait_block->vtag_block[i].rport == rport)) {
4530                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4531                                 twait_block->vtag_block[i].v_tag = 0;
4532                                 twait_block->vtag_block[i].lport = 0;
4533                                 twait_block->vtag_block[i].rport = 0;
4534                                 found = 1;
4535                                 break;
4536                         }
4537                 }
4538                 if (found)
4539                         break;
4540         }
4541 }
4542
4543 int
4544 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4545 {
4546         struct sctpvtaghead *chain;
4547         struct sctp_tagblock *twait_block;
4548         int found = 0;
4549         int i;
4550
4551         SCTP_INP_INFO_WLOCK();
4552         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4553         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4554                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4555                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4556                             (twait_block->vtag_block[i].lport == lport) &&
4557                             (twait_block->vtag_block[i].rport == rport)) {
4558                                 found = 1;
4559                                 break;
4560                         }
4561                 }
4562                 if (found)
4563                         break;
4564         }
4565         SCTP_INP_INFO_WUNLOCK();
4566         return (found);
4567 }
4568
4569
4570 void
4571 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4572 {
4573         struct sctpvtaghead *chain;
4574         struct sctp_tagblock *twait_block;
4575         struct timeval now;
4576         int set, i;
4577
4578         if (time == 0) {
4579                 /* Its disabled */
4580                 return;
4581         }
4582         (void)SCTP_GETTIME_TIMEVAL(&now);
4583         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4584         set = 0;
4585         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4586                 /* Block(s) present, lets find space, and expire on the fly */
4587                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4588                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4589                             !set) {
4590                                 twait_block->vtag_block[i].tv_sec_at_expire =
4591                                     now.tv_sec + time;
4592                                 twait_block->vtag_block[i].v_tag = tag;
4593                                 twait_block->vtag_block[i].lport = lport;
4594                                 twait_block->vtag_block[i].rport = rport;
4595                                 set = 1;
4596                         } else if ((twait_block->vtag_block[i].v_tag) &&
4597                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4598                                 /* Audit expires this guy */
4599                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4600                                 twait_block->vtag_block[i].v_tag = 0;
4601                                 twait_block->vtag_block[i].lport = 0;
4602                                 twait_block->vtag_block[i].rport = 0;
4603                                 if (set == 0) {
4604                                         /* Reuse it for my new tag */
4605                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4606                                         twait_block->vtag_block[i].v_tag = tag;
4607                                         twait_block->vtag_block[i].lport = lport;
4608                                         twait_block->vtag_block[i].rport = rport;
4609                                         set = 1;
4610                                 }
4611                         }
4612                 }
4613                 if (set) {
4614                         /*
4615                          * We only do up to the block where we can place our
4616                          * tag for audits
4617                          */
4618                         break;
4619                 }
4620         }
4621         /* Need to add a new block to chain */
4622         if (!set) {
4623                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4624                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4625                 if (twait_block == NULL) {
4626                         return;
4627                 }
4628                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4629                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4630                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4631                 twait_block->vtag_block[0].v_tag = tag;
4632                 twait_block->vtag_block[0].lport = lport;
4633                 twait_block->vtag_block[0].rport = rport;
4634         }
4635 }
4636
4637 void
4638 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4639 {
4640         struct sctp_tmit_chunk *chk, *nchk;
4641         struct sctp_queued_to_read *control, *ncontrol;
4642
4643         TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) {
4644                 TAILQ_REMOVE(rh, control, next_instrm);
4645                 control->on_strm_q = 0;
4646                 if (control->on_read_q == 0) {
4647                         sctp_free_remote_addr(control->whoFrom);
4648                         if (control->data) {
4649                                 sctp_m_freem(control->data);
4650                                 control->data = NULL;
4651                         }
4652                 }
4653                 /* Reassembly free? */
4654                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
4655                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
4656                         if (chk->data) {
4657                                 sctp_m_freem(chk->data);
4658                                 chk->data = NULL;
4659                         }
4660                         if (chk->holds_key_ref)
4661                                 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4662                         sctp_free_remote_addr(chk->whoTo);
4663                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4664                         SCTP_DECR_CHK_COUNT();
4665                         /* sa_ignore FREED_MEMORY */
4666                 }
4667                 /*
4668                  * We don't free the address here since all the net's were
4669                  * freed above.
4670                  */
4671                 if (control->on_read_q == 0) {
4672                         sctp_free_a_readq(stcb, control);
4673                 }
4674         }
4675 }
4676
4677 /*-
4678  * Free the association after un-hashing the remote port. This
4679  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4680  * expect that the input to this function IS a locked TCB.
4681  * It will return 0, if it did NOT destroy the association (instead
4682  * it unlocks it. It will return NON-zero if it either destroyed the
4683  * association OR the association is already destroyed.
4684  */
4685 int
4686 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4687 {
4688         int i;
4689         struct sctp_association *asoc;
4690         struct sctp_nets *net, *nnet;
4691         struct sctp_laddr *laddr, *naddr;
4692         struct sctp_tmit_chunk *chk, *nchk;
4693         struct sctp_asconf_addr *aparam, *naparam;
4694         struct sctp_asconf_ack *aack, *naack;
4695         struct sctp_stream_reset_list *strrst, *nstrrst;
4696         struct sctp_queued_to_read *sq, *nsq;
4697         struct sctp_stream_queue_pending *sp, *nsp;
4698         sctp_sharedkey_t *shared_key, *nshared_key;
4699         struct socket *so;
4700
4701         /* first, lets purge the entry from the hash table. */
4702
4703 #ifdef SCTP_LOG_CLOSING
4704         sctp_log_closing(inp, stcb, 6);
4705 #endif
4706         if (stcb->asoc.state == 0) {
4707 #ifdef SCTP_LOG_CLOSING
4708                 sctp_log_closing(inp, NULL, 7);
4709 #endif
4710                 /* there is no asoc, really TSNH :-0 */
4711                 return (1);
4712         }
4713         if (stcb->asoc.alternate) {
4714                 sctp_free_remote_addr(stcb->asoc.alternate);
4715                 stcb->asoc.alternate = NULL;
4716         }
4717         /* TEMP CODE */
4718         if (stcb->freed_from_where == 0) {
4719                 /* Only record the first place free happened from */
4720                 stcb->freed_from_where = from_location;
4721         }
4722         /* TEMP CODE */
4723
4724         asoc = &stcb->asoc;
4725         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4726             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4727                 /* nothing around */
4728                 so = NULL;
4729         else
4730                 so = inp->sctp_socket;
4731
4732         /*
4733          * We used timer based freeing if a reader or writer is in the way.
4734          * So we first check if we are actually being called from a timer,
4735          * if so we abort early if a reader or writer is still in the way.
4736          */
4737         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4738             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4739                 /*
4740                  * is it the timer driving us? if so are the reader/writers
4741                  * gone?
4742                  */
4743                 if (stcb->asoc.refcnt) {
4744                         /* nope, reader or writer in the way */
4745                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4746                         /* no asoc destroyed */
4747                         SCTP_TCB_UNLOCK(stcb);
4748 #ifdef SCTP_LOG_CLOSING
4749                         sctp_log_closing(inp, stcb, 8);
4750 #endif
4751                         return (0);
4752                 }
4753         }
4754         /* Now clean up any other timers */
4755         sctp_stop_association_timers(stcb, false);
4756         /* Now the read queue needs to be cleaned up (only once) */
4757         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4758                 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED);
4759                 SCTP_INP_READ_LOCK(inp);
4760                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4761                         if (sq->stcb == stcb) {
4762                                 sq->do_not_ref_stcb = 1;
4763                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4764                                 /*
4765                                  * If there is no end, there never will be
4766                                  * now.
4767                                  */
4768                                 if (sq->end_added == 0) {
4769                                         /* Held for PD-API clear that. */
4770                                         sq->pdapi_aborted = 1;
4771                                         sq->held_length = 0;
4772                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4773                                                 /*
4774                                                  * Need to add a PD-API
4775                                                  * aborted indication.
4776                                                  * Setting the control_pdapi
4777                                                  * assures that it will be
4778                                                  * added right after this
4779                                                  * msg.
4780                                                  */
4781                                                 uint32_t strseq;
4782
4783                                                 stcb->asoc.control_pdapi = sq;
4784                                                 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff);
4785                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4786                                                     stcb,
4787                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4788                                                     (void *)&strseq,
4789                                                     SCTP_SO_LOCKED);
4790                                                 stcb->asoc.control_pdapi = NULL;
4791                                         }
4792                                 }
4793                                 /* Add an end to wake them */
4794                                 sq->end_added = 1;
4795                         }
4796                 }
4797                 SCTP_INP_READ_UNLOCK(inp);
4798                 if (stcb->block_entry) {
4799                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4800                         stcb->block_entry->error = ECONNRESET;
4801                         stcb->block_entry = NULL;
4802                 }
4803         }
4804         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4805                 /*
4806                  * Someone holds a reference OR the socket is unaccepted
4807                  * yet.
4808                  */
4809                 if ((stcb->asoc.refcnt) ||
4810                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4811                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4812                         SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4813                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4814                 }
4815                 SCTP_TCB_UNLOCK(stcb);
4816                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4817                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4818                         /* nothing around */
4819                         so = NULL;
4820                 if (so) {
4821                         /* Wake any reader/writers */
4822                         sctp_sorwakeup(inp, so);
4823                         sctp_sowwakeup(inp, so);
4824                 }
4825
4826 #ifdef SCTP_LOG_CLOSING
4827                 sctp_log_closing(inp, stcb, 9);
4828 #endif
4829                 /* no asoc destroyed */
4830                 return (0);
4831         }
4832 #ifdef SCTP_LOG_CLOSING
4833         sctp_log_closing(inp, stcb, 10);
4834 #endif
4835         /*
4836          * When I reach here, no others want to kill the assoc yet.. and I
4837          * own the lock. Now its possible an abort comes in when I do the
4838          * lock exchange below to grab all the locks to do the final take
4839          * out. to prevent this we increment the count, which will start a
4840          * timer and blow out above thus assuring us that we hold exclusive
4841          * killing of the asoc. Note that after getting back the TCB lock we
4842          * will go ahead and increment the counter back up and stop any
4843          * timer a passing stranger may have started :-S
4844          */
4845         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4846                 atomic_add_int(&stcb->asoc.refcnt, 1);
4847
4848                 SCTP_TCB_UNLOCK(stcb);
4849                 SCTP_INP_INFO_WLOCK();
4850                 SCTP_INP_WLOCK(inp);
4851                 SCTP_TCB_LOCK(stcb);
4852         }
4853         /* Double check the GONE flag */
4854         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4855             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4856                 /* nothing around */
4857                 so = NULL;
4858
4859         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4860             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4861                 /*
4862                  * For TCP type we need special handling when we are
4863                  * connected. We also include the peel'ed off ones to.
4864                  */
4865                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4866                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4867                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4868                         if (so) {
4869                                 SOCKBUF_LOCK(&so->so_rcv);
4870                                 so->so_state &= ~(SS_ISCONNECTING |
4871                                     SS_ISDISCONNECTING |
4872                                     SS_ISCONFIRMING |
4873                                     SS_ISCONNECTED);
4874                                 so->so_state |= SS_ISDISCONNECTED;
4875                                 socantrcvmore_locked(so);
4876                                 socantsendmore(so);
4877                                 sctp_sowwakeup(inp, so);
4878                                 sctp_sorwakeup(inp, so);
4879                                 SCTP_SOWAKEUP(so);
4880                         }
4881                 }
4882         }
4883
4884         /*
4885          * Make it invalid too, that way if its about to run it will abort
4886          * and return.
4887          */
4888         /* re-increment the lock */
4889         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4890                 atomic_add_int(&stcb->asoc.refcnt, -1);
4891         }
4892         if (stcb->asoc.refcnt) {
4893                 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4894                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4895                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4896                         SCTP_INP_INFO_WUNLOCK();
4897                         SCTP_INP_WUNLOCK(inp);
4898                 }
4899                 SCTP_TCB_UNLOCK(stcb);
4900                 return (0);
4901         }
4902         asoc->state = 0;
4903         if (inp->sctp_tcbhash) {
4904                 LIST_REMOVE(stcb, sctp_tcbhash);
4905         }
4906         if (stcb->asoc.in_asocid_hash) {
4907                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4908         }
4909         /* Now lets remove it from the list of ALL associations in the EP */
4910         LIST_REMOVE(stcb, sctp_tcblist);
4911         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4912                 SCTP_INP_INCR_REF(inp);
4913                 SCTP_INP_WUNLOCK(inp);
4914         }
4915         /* pull from vtag hash */
4916         LIST_REMOVE(stcb, sctp_asocs);
4917         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4918             inp->sctp_lport, stcb->rport);
4919
4920         /*
4921          * Now restop the timers to be sure this is paranoia at is finest!
4922          */
4923         sctp_stop_association_timers(stcb, true);
4924
4925         /*
4926          * The chunk lists and such SHOULD be empty but we check them just
4927          * in case.
4928          */
4929         /* anything on the wheel needs to be removed */
4930         SCTP_TCB_SEND_LOCK(stcb);
4931         for (i = 0; i < asoc->streamoutcnt; i++) {
4932                 struct sctp_stream_out *outs;
4933
4934                 outs = &asoc->strmout[i];
4935                 /* now clean up any chunks here */
4936                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4937                         atomic_subtract_int(&asoc->stream_queue_cnt, 1);
4938                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4939                         stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1);
4940                         sctp_free_spbufspace(stcb, asoc, sp);
4941                         if (sp->data) {
4942                                 if (so) {
4943                                         /* Still an open socket - report */
4944                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4945                                             0, (void *)sp, SCTP_SO_LOCKED);
4946                                 }
4947                                 if (sp->data) {
4948                                         sctp_m_freem(sp->data);
4949                                         sp->data = NULL;
4950                                         sp->tail_mbuf = NULL;
4951                                         sp->length = 0;
4952                                 }
4953                         }
4954                         if (sp->net) {
4955                                 sctp_free_remote_addr(sp->net);
4956                                 sp->net = NULL;
4957                         }
4958                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4959                 }
4960         }
4961         SCTP_TCB_SEND_UNLOCK(stcb);
4962         /* sa_ignore FREED_MEMORY */
4963         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4964                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4965                 SCTP_FREE(strrst, SCTP_M_STRESET);
4966         }
4967         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4968                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4969                 if (sq->data) {
4970                         sctp_m_freem(sq->data);
4971                         sq->data = NULL;
4972                 }
4973                 sctp_free_remote_addr(sq->whoFrom);
4974                 sq->whoFrom = NULL;
4975                 sq->stcb = NULL;
4976                 /* Free the ctl entry */
4977                 sctp_free_a_readq(stcb, sq);
4978                 /* sa_ignore FREED_MEMORY */
4979         }
4980         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4981                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4982                 if (chk->data) {
4983                         sctp_m_freem(chk->data);
4984                         chk->data = NULL;
4985                 }
4986                 if (chk->holds_key_ref)
4987                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4988                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4989                 SCTP_DECR_CHK_COUNT();
4990                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4991                 asoc->free_chunk_cnt--;
4992                 /* sa_ignore FREED_MEMORY */
4993         }
4994         /* pending send queue SHOULD be empty */
4995         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4996                 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
4997                         asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
4998 #ifdef INVARIANTS
4999                 } else {
5000                         panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5001 #endif
5002                 }
5003                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5004                 if (chk->data) {
5005                         if (so) {
5006                                 /* Still a socket? */
5007                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5008                                     0, chk, SCTP_SO_LOCKED);
5009                         }
5010                         if (chk->data) {
5011                                 sctp_m_freem(chk->data);
5012                                 chk->data = NULL;
5013                         }
5014                 }
5015                 if (chk->holds_key_ref)
5016                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5017                 if (chk->whoTo) {
5018                         sctp_free_remote_addr(chk->whoTo);
5019                         chk->whoTo = NULL;
5020                 }
5021                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5022                 SCTP_DECR_CHK_COUNT();
5023                 /* sa_ignore FREED_MEMORY */
5024         }
5025         /* sent queue SHOULD be empty */
5026         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5027                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5028                         if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5029                                 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5030 #ifdef INVARIANTS
5031                         } else {
5032                                 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5033 #endif
5034                         }
5035                 }
5036                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5037                 if (chk->data) {
5038                         if (so) {
5039                                 /* Still a socket? */
5040                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5041                                     0, chk, SCTP_SO_LOCKED);
5042                         }
5043                         if (chk->data) {
5044                                 sctp_m_freem(chk->data);
5045                                 chk->data = NULL;
5046                         }
5047                 }
5048                 if (chk->holds_key_ref)
5049                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5050                 sctp_free_remote_addr(chk->whoTo);
5051                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5052                 SCTP_DECR_CHK_COUNT();
5053                 /* sa_ignore FREED_MEMORY */
5054         }
5055 #ifdef INVARIANTS
5056         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5057                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5058                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5059                 }
5060         }
5061 #endif
5062         /* control queue MAY not be empty */
5063         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5064                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5065                 if (chk->data) {
5066                         sctp_m_freem(chk->data);
5067                         chk->data = NULL;
5068                 }
5069                 if (chk->holds_key_ref)
5070                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5071                 sctp_free_remote_addr(chk->whoTo);
5072                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5073                 SCTP_DECR_CHK_COUNT();
5074                 /* sa_ignore FREED_MEMORY */
5075         }
5076         /* ASCONF queue MAY not be empty */
5077         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5078                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5079                 if (chk->data) {
5080                         sctp_m_freem(chk->data);
5081                         chk->data = NULL;
5082                 }
5083                 if (chk->holds_key_ref)
5084                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5085                 sctp_free_remote_addr(chk->whoTo);
5086                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5087                 SCTP_DECR_CHK_COUNT();
5088                 /* sa_ignore FREED_MEMORY */
5089         }
5090         if (asoc->mapping_array) {
5091                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5092                 asoc->mapping_array = NULL;
5093         }
5094         if (asoc->nr_mapping_array) {
5095                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5096                 asoc->nr_mapping_array = NULL;
5097         }
5098         /* the stream outs */
5099         if (asoc->strmout) {
5100                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5101                 asoc->strmout = NULL;
5102         }
5103         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5104         if (asoc->strmin) {
5105                 for (i = 0; i < asoc->streamincnt; i++) {
5106                         sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5107                         sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5108                 }
5109                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5110                 asoc->strmin = NULL;
5111         }
5112         asoc->streamincnt = 0;
5113         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5114 #ifdef INVARIANTS
5115                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5116                         panic("no net's left alloc'ed, or list points to itself");
5117                 }
5118 #endif
5119                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5120                 sctp_free_remote_addr(net);
5121         }
5122         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5123                 /* sa_ignore FREED_MEMORY */
5124                 sctp_remove_laddr(laddr);
5125         }
5126
5127         /* pending asconf (address) parameters */
5128         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5129                 /* sa_ignore FREED_MEMORY */
5130                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5131                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5132         }
5133         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5134                 /* sa_ignore FREED_MEMORY */
5135                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5136                 if (aack->data != NULL) {
5137                         sctp_m_freem(aack->data);
5138                 }
5139                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5140         }
5141         /* clean up auth stuff */
5142         if (asoc->local_hmacs)
5143                 sctp_free_hmaclist(asoc->local_hmacs);
5144         if (asoc->peer_hmacs)
5145                 sctp_free_hmaclist(asoc->peer_hmacs);
5146
5147         if (asoc->local_auth_chunks)
5148                 sctp_free_chunklist(asoc->local_auth_chunks);
5149         if (asoc->peer_auth_chunks)
5150                 sctp_free_chunklist(asoc->peer_auth_chunks);
5151
5152         sctp_free_authinfo(&asoc->authinfo);
5153
5154         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5155                 LIST_REMOVE(shared_key, next);
5156                 sctp_free_sharedkey(shared_key);
5157                 /* sa_ignore FREED_MEMORY */
5158         }
5159
5160         /* Insert new items here :> */
5161
5162         /* Get rid of LOCK */
5163         SCTP_TCB_UNLOCK(stcb);
5164         SCTP_TCB_LOCK_DESTROY(stcb);
5165         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5166         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5167                 SCTP_INP_INFO_WUNLOCK();
5168                 SCTP_INP_RLOCK(inp);
5169         }
5170 #ifdef SCTP_TRACK_FREED_ASOCS
5171         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5172                 /* now clean up the tasoc itself */
5173                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5174                 SCTP_DECR_ASOC_COUNT();
5175         } else {
5176                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5177         }
5178 #else
5179         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5180         SCTP_DECR_ASOC_COUNT();
5181 #endif
5182         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5183                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5184                         /*
5185                          * If its NOT the inp_free calling us AND sctp_close
5186                          * as been called, we call back...
5187                          */
5188                         SCTP_INP_RUNLOCK(inp);
5189                         /*
5190                          * This will start the kill timer (if we are the
5191                          * last one) since we hold an increment yet. But
5192                          * this is the only safe way to do this since
5193                          * otherwise if the socket closes at the same time
5194                          * we are here we might collide in the cleanup.
5195                          */
5196                         sctp_inpcb_free(inp,
5197                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5198                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5199                         SCTP_INP_DECR_REF(inp);
5200                 } else {
5201                         /* The socket is still open. */
5202                         SCTP_INP_DECR_REF(inp);
5203                         SCTP_INP_RUNLOCK(inp);
5204                 }
5205         }
5206         /* destroyed the asoc */
5207 #ifdef SCTP_LOG_CLOSING
5208         sctp_log_closing(inp, NULL, 11);
5209 #endif
5210         return (1);
5211 }
5212
5213
5214
5215 /*
5216  * determine if a destination is "reachable" based upon the addresses bound
5217  * to the current endpoint (e.g. only v4 or v6 currently bound)
5218  */
5219 /*
5220  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5221  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5222  * types bound as its endpoint
5223  */
5224 int
5225 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5226 {
5227         struct sctp_inpcb *inp;
5228         int answer;
5229
5230         /*
5231          * No locks here, the TCB, in all cases is already locked and an
5232          * assoc is up. There is either a INP lock by the caller applied (in
5233          * asconf case when deleting an address) or NOT in the HB case,
5234          * however if HB then the INP increment is up and the INP will not
5235          * be removed (on top of the fact that we have a TCB lock). So we
5236          * only want to read the sctp_flags, which is either bound-all or
5237          * not.. no protection needed since once an assoc is up you can't be
5238          * changing your binding.
5239          */
5240         inp = stcb->sctp_ep;
5241         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5242                 /* if bound all, destination is not restricted */
5243                 /*
5244                  * RRS: Question during lock work: Is this correct? If you
5245                  * are bound-all you still might need to obey the V4--V6
5246                  * flags??? IMO this bound-all stuff needs to be removed!
5247                  */
5248                 return (1);
5249         }
5250         /* NOTE: all "scope" checks are done when local addresses are added */
5251         switch (destaddr->sa_family) {
5252 #ifdef INET6
5253         case AF_INET6:
5254                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5255                 break;
5256 #endif
5257 #ifdef INET
5258         case AF_INET:
5259                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5260                 break;
5261 #endif
5262         default:
5263                 /* invalid family, so it's unreachable */
5264                 answer = 0;
5265                 break;
5266         }
5267         return (answer);
5268 }
5269
5270 /*
5271  * update the inp_vflags on an endpoint
5272  */
5273 static void
5274 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5275 {
5276         struct sctp_laddr *laddr;
5277
5278         /* first clear the flag */
5279         inp->ip_inp.inp.inp_vflag = 0;
5280         /* set the flag based on addresses on the ep list */
5281         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5282                 if (laddr->ifa == NULL) {
5283                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5284                             __func__);
5285                         continue;
5286                 }
5287
5288                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5289                         continue;
5290                 }
5291                 switch (laddr->ifa->address.sa.sa_family) {
5292 #ifdef INET6
5293                 case AF_INET6:
5294                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5295                         break;
5296 #endif
5297 #ifdef INET
5298                 case AF_INET:
5299                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5300                         break;
5301 #endif
5302                 default:
5303                         break;
5304                 }
5305         }
5306 }
5307
5308 /*
5309  * Add the address to the endpoint local address list There is nothing to be
5310  * done if we are bound to all addresses
5311  */
5312 void
5313 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5314 {
5315         struct sctp_laddr *laddr;
5316         struct sctp_tcb *stcb;
5317         int fnd, error = 0;
5318
5319         fnd = 0;
5320
5321         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5322                 /* You are already bound to all. You have it already */
5323                 return;
5324         }
5325 #ifdef INET6
5326         if (ifa->address.sa.sa_family == AF_INET6) {
5327                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5328                         /* Can't bind a non-useable addr. */
5329                         return;
5330                 }
5331         }
5332 #endif
5333         /* first, is it already present? */
5334         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5335                 if (laddr->ifa == ifa) {
5336                         fnd = 1;
5337                         break;
5338                 }
5339         }
5340
5341         if (fnd == 0) {
5342                 /* Not in the ep list */
5343                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5344                 if (error != 0)
5345                         return;
5346                 inp->laddr_count++;
5347                 /* update inp_vflag flags */
5348                 switch (ifa->address.sa.sa_family) {
5349 #ifdef INET6
5350                 case AF_INET6:
5351                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5352                         break;
5353 #endif
5354 #ifdef INET
5355                 case AF_INET:
5356                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5357                         break;
5358 #endif
5359                 default:
5360                         break;
5361                 }
5362                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5363                         sctp_add_local_addr_restricted(stcb, ifa);
5364                 }
5365         }
5366         return;
5367 }
5368
5369
5370 /*
5371  * select a new (hopefully reachable) destination net (should only be used
5372  * when we deleted an ep addr that is the only usable source address to reach
5373  * the destination net)
5374  */
5375 static void
5376 sctp_select_primary_destination(struct sctp_tcb *stcb)
5377 {
5378         struct sctp_nets *net;
5379
5380         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5381                 /* for now, we'll just pick the first reachable one we find */
5382                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5383                         continue;
5384                 if (sctp_destination_is_reachable(stcb,
5385                     (struct sockaddr *)&net->ro._l_addr)) {
5386                         /* found a reachable destination */
5387                         stcb->asoc.primary_destination = net;
5388                 }
5389         }
5390         /* I can't there from here! ...we're gonna die shortly... */
5391 }
5392
5393
5394 /*
5395  * Delete the address from the endpoint local address list. There is nothing
5396  * to be done if we are bound to all addresses
5397  */
5398 void
5399 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5400 {
5401         struct sctp_laddr *laddr;
5402         int fnd;
5403
5404         fnd = 0;
5405         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5406                 /* You are already bound to all. You have it already */
5407                 return;
5408         }
5409         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5410                 if (laddr->ifa == ifa) {
5411                         fnd = 1;
5412                         break;
5413                 }
5414         }
5415         if (fnd && (inp->laddr_count < 2)) {
5416                 /* can't delete unless there are at LEAST 2 addresses */
5417                 return;
5418         }
5419         if (fnd) {
5420                 /*
5421                  * clean up any use of this address go through our
5422                  * associations and clear any last_used_address that match
5423                  * this one for each assoc, see if a new primary_destination
5424                  * is needed
5425                  */
5426                 struct sctp_tcb *stcb;
5427
5428                 /* clean up "next_addr_touse" */
5429                 if (inp->next_addr_touse == laddr)
5430                         /* delete this address */
5431                         inp->next_addr_touse = NULL;
5432
5433                 /* clean up "last_used_address" */
5434                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5435                         struct sctp_nets *net;
5436
5437                         SCTP_TCB_LOCK(stcb);
5438                         if (stcb->asoc.last_used_address == laddr)
5439                                 /* delete this address */
5440                                 stcb->asoc.last_used_address = NULL;
5441                         /*
5442                          * Now spin through all the nets and purge any ref
5443                          * to laddr
5444                          */
5445                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5446                                 if (net->ro._s_addr == laddr->ifa) {
5447                                         /* Yep, purge src address selected */
5448                                         sctp_rtentry_t *rt;
5449
5450                                         /* delete this address if cached */
5451                                         rt = net->ro.ro_rt;
5452                                         if (rt != NULL) {
5453                                                 RTFREE(rt);
5454                                                 net->ro.ro_rt = NULL;
5455                                         }
5456                                         sctp_free_ifa(net->ro._s_addr);
5457                                         net->ro._s_addr = NULL;
5458                                         net->src_addr_selected = 0;
5459                                 }
5460                         }
5461                         SCTP_TCB_UNLOCK(stcb);
5462                 }               /* for each tcb */
5463                 /* remove it from the ep list */
5464                 sctp_remove_laddr(laddr);
5465                 inp->laddr_count--;
5466                 /* update inp_vflag flags */
5467                 sctp_update_ep_vflag(inp);
5468         }
5469         return;
5470 }
5471
5472 /*
5473  * Add the address to the TCB local address restricted list.
5474  * This is a "pending" address list (eg. addresses waiting for an
5475  * ASCONF-ACK response) and cannot be used as a valid source address.
5476  */
5477 void
5478 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5479 {
5480         struct sctp_laddr *laddr;
5481         struct sctpladdr *list;
5482
5483         /*
5484          * Assumes TCB is locked.. and possibly the INP. May need to
5485          * confirm/fix that if we need it and is not the case.
5486          */
5487         list = &stcb->asoc.sctp_restricted_addrs;
5488
5489 #ifdef INET6
5490         if (ifa->address.sa.sa_family == AF_INET6) {
5491                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5492                         /* Can't bind a non-existent addr. */
5493                         return;
5494                 }
5495         }
5496 #endif
5497         /* does the address already exist? */
5498         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5499                 if (laddr->ifa == ifa) {
5500                         return;
5501                 }
5502         }
5503
5504         /* add to the list */
5505         (void)sctp_insert_laddr(list, ifa, 0);
5506         return;
5507 }
5508
5509 /*
5510  * Remove a local address from the TCB local address restricted list
5511  */
5512 void
5513 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5514 {
5515         struct sctp_inpcb *inp;
5516         struct sctp_laddr *laddr;
5517
5518         /*
5519          * This is called by asconf work. It is assumed that a) The TCB is
5520          * locked and b) The INP is locked. This is true in as much as I can
5521          * trace through the entry asconf code where I did these locks.
5522          * Again, the ASCONF code is a bit different in that it does lock
5523          * the INP during its work often times. This must be since we don't
5524          * want other proc's looking up things while what they are looking
5525          * up is changing :-D
5526          */
5527
5528         inp = stcb->sctp_ep;
5529         /* if subset bound and don't allow ASCONF's, can't delete last */
5530         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5531             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5532                 if (stcb->sctp_ep->laddr_count < 2) {
5533                         /* can't delete last address */
5534                         return;
5535                 }
5536         }
5537         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5538                 /* remove the address if it exists */
5539                 if (laddr->ifa == NULL)
5540                         continue;
5541                 if (laddr->ifa == ifa) {
5542                         sctp_remove_laddr(laddr);
5543                         return;
5544                 }
5545         }
5546
5547         /* address not found! */
5548         return;
5549 }
5550
5551 /*
5552  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5553  */
5554 /* sysctl */
5555 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5556 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5557
5558
5559
5560 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5561 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5562 int *sctp_cpuarry = NULL;
5563 void
5564 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5565 {
5566         /* Queue a packet to a processor for the specified core */
5567         struct sctp_mcore_queue *qent;
5568         struct sctp_mcore_ctrl *wkq;
5569         int need_wake = 0;
5570
5571         if (sctp_mcore_workers == NULL) {
5572                 /* Something went way bad during setup */
5573                 sctp_input_with_port(m, off, 0);
5574                 return;
5575         }
5576         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5577             (sizeof(struct sctp_mcore_queue)),
5578             SCTP_M_MCORE);
5579         if (qent == NULL) {
5580                 /* This is trouble  */
5581                 sctp_input_with_port(m, off, 0);
5582                 return;
5583         }
5584         qent->vn = curvnet;
5585         qent->m = m;
5586         qent->off = off;
5587         qent->v6 = 0;
5588         wkq = &sctp_mcore_workers[cpu_to_use];
5589         SCTP_MCORE_QLOCK(wkq);
5590
5591         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5592         if (wkq->running == 0) {
5593                 need_wake = 1;
5594         }
5595         SCTP_MCORE_QUNLOCK(wkq);
5596         if (need_wake) {
5597                 wakeup(&wkq->running);
5598         }
5599 }
5600
5601 static void
5602 sctp_mcore_thread(void *arg)
5603 {
5604
5605         struct sctp_mcore_ctrl *wkq;
5606         struct sctp_mcore_queue *qent;
5607
5608         wkq = (struct sctp_mcore_ctrl *)arg;
5609         struct mbuf *m;
5610         int off, v6;
5611
5612         /* Wait for first tickle */
5613         SCTP_MCORE_LOCK(wkq);
5614         wkq->running = 0;
5615         msleep(&wkq->running,
5616             &wkq->core_mtx,
5617             0, "wait for pkt", 0);
5618         SCTP_MCORE_UNLOCK(wkq);
5619
5620         /* Bind to our cpu */
5621         thread_lock(curthread);
5622         sched_bind(curthread, wkq->cpuid);
5623         thread_unlock(curthread);
5624
5625         /* Now lets start working */
5626         SCTP_MCORE_LOCK(wkq);
5627         /* Now grab lock and go */
5628         for (;;) {
5629                 SCTP_MCORE_QLOCK(wkq);
5630 skip_sleep:
5631                 wkq->running = 1;
5632                 qent = TAILQ_FIRST(&wkq->que);
5633                 if (qent) {
5634                         TAILQ_REMOVE(&wkq->que, qent, next);
5635                         SCTP_MCORE_QUNLOCK(wkq);
5636                         CURVNET_SET(qent->vn);
5637                         m = qent->m;
5638                         off = qent->off;
5639                         v6 = qent->v6;
5640                         SCTP_FREE(qent, SCTP_M_MCORE);
5641                         if (v6 == 0) {
5642                                 sctp_input_with_port(m, off, 0);
5643                         } else {
5644                                 SCTP_PRINTF("V6 not yet supported\n");
5645                                 sctp_m_freem(m);
5646                         }
5647                         CURVNET_RESTORE();
5648                         SCTP_MCORE_QLOCK(wkq);
5649                 }
5650                 wkq->running = 0;
5651                 if (!TAILQ_EMPTY(&wkq->que)) {
5652                         goto skip_sleep;
5653                 }
5654                 SCTP_MCORE_QUNLOCK(wkq);
5655                 msleep(&wkq->running,
5656                     &wkq->core_mtx,
5657                     0, "wait for pkt", 0);
5658         }
5659 }
5660
5661 static void
5662 sctp_startup_mcore_threads(void)
5663 {
5664         int i, cpu;
5665
5666         if (mp_ncpus == 1)
5667                 return;
5668
5669         if (sctp_mcore_workers != NULL) {
5670                 /*
5671                  * Already been here in some previous vnet?
5672                  */
5673                 return;
5674         }
5675         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5676             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5677             SCTP_M_MCORE);
5678         if (sctp_mcore_workers == NULL) {
5679                 /* TSNH I hope */
5680                 return;
5681         }
5682         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5683             sizeof(struct sctp_mcore_ctrl)));
5684         /* Init the structures */
5685         for (i = 0; i <= mp_maxid; i++) {
5686                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5687                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5688                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5689                 sctp_mcore_workers[i].cpuid = i;
5690         }
5691         if (sctp_cpuarry == NULL) {
5692                 SCTP_MALLOC(sctp_cpuarry, int *,
5693                     (mp_ncpus * sizeof(int)),
5694                     SCTP_M_MCORE);
5695                 i = 0;
5696                 CPU_FOREACH(cpu) {
5697                         sctp_cpuarry[i] = cpu;
5698                         i++;
5699                 }
5700         }
5701         /* Now start them all */
5702         CPU_FOREACH(cpu) {
5703                 (void)kproc_create(sctp_mcore_thread,
5704                     (void *)&sctp_mcore_workers[cpu],
5705                     &sctp_mcore_workers[cpu].thread_proc,
5706                     RFPROC,
5707                     SCTP_KTHREAD_PAGES,
5708                     SCTP_MCORE_NAME);
5709         }
5710 }
5711 #endif
5712
5713 void
5714 sctp_pcb_init(void)
5715 {
5716         /*
5717          * SCTP initialization for the PCB structures should be called by
5718          * the sctp_init() function.
5719          */
5720         int i;
5721         struct timeval tv;
5722
5723         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5724                 /* error I was called twice */
5725                 return;
5726         }
5727         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5728
5729 #if defined(SCTP_LOCAL_TRACE_BUF)
5730         memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log));
5731 #endif
5732 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5733         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5734             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5735             SCTP_M_MCORE);
5736 #endif
5737         (void)SCTP_GETTIME_TIMEVAL(&tv);
5738 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5739         memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1));
5740         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
5741         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
5742 #else
5743         memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat));
5744         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
5745         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
5746 #endif
5747         /* init the empty list of (All) Endpoints */
5748         LIST_INIT(&SCTP_BASE_INFO(listhead));
5749
5750
5751         /* init the hash table of endpoints */
5752         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5753         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5754         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5755         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5756             &SCTP_BASE_INFO(hashasocmark));
5757         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5758             &SCTP_BASE_INFO(hashmark));
5759         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5760             &SCTP_BASE_INFO(hashtcpmark));
5761         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5762
5763
5764         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5765             &SCTP_BASE_INFO(hashvrfmark));
5766
5767         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5768             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5769         /* init the zones */
5770         /*
5771          * FIX ME: Should check for NULL returns, but if it does fail we are
5772          * doomed to panic anyways... add later maybe.
5773          */
5774         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5775             sizeof(struct sctp_inpcb), maxsockets);
5776
5777         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5778             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5779
5780         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5781             sizeof(struct sctp_laddr),
5782             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5783
5784         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5785             sizeof(struct sctp_nets),
5786             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5787
5788         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5789             sizeof(struct sctp_tmit_chunk),
5790             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5791
5792         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5793             sizeof(struct sctp_queued_to_read),
5794             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5795
5796         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5797             sizeof(struct sctp_stream_queue_pending),
5798             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5799
5800         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5801             sizeof(struct sctp_asconf),
5802             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5803
5804         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5805             sizeof(struct sctp_asconf_ack),
5806             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5807
5808
5809         /* Master Lock INIT for info structure */
5810         SCTP_INP_INFO_LOCK_INIT();
5811         SCTP_STATLOG_INIT_LOCK();
5812
5813         SCTP_IPI_COUNT_INIT();
5814         SCTP_IPI_ADDR_INIT();
5815 #ifdef SCTP_PACKET_LOGGING
5816         SCTP_IP_PKTLOG_INIT();
5817 #endif
5818         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5819
5820         SCTP_WQ_ADDR_INIT();
5821         /* not sure if we need all the counts */
5822         SCTP_BASE_INFO(ipi_count_ep) = 0;
5823         /* assoc/tcb zone info */
5824         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5825         /* local addrlist zone info */
5826         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5827         /* remote addrlist zone info */
5828         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5829         /* chunk info */
5830         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5831
5832         /* socket queue zone info */
5833         SCTP_BASE_INFO(ipi_count_readq) = 0;
5834
5835         /* stream out queue cont */
5836         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5837
5838         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5839         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5840
5841         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5842
5843         /* Init the TIMEWAIT list */
5844         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5845                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5846         }
5847         sctp_startup_iterator();
5848
5849 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5850         sctp_startup_mcore_threads();
5851 #endif
5852
5853         /*
5854          * INIT the default VRF which for BSD is the only one, other O/S's
5855          * may have more. But initially they must start with one and then
5856          * add the VRF's as addresses are added.
5857          */
5858         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5859 }
5860
5861 /*
5862  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5863  */
5864 void
5865 sctp_pcb_finish(void)
5866 {
5867         struct sctp_vrflist *vrf_bucket;
5868         struct sctp_vrf *vrf, *nvrf;
5869         struct sctp_ifn *ifn, *nifn;
5870         struct sctp_ifa *ifa, *nifa;
5871         struct sctpvtaghead *chain;
5872         struct sctp_tagblock *twait_block, *prev_twait_block;
5873         struct sctp_laddr *wi, *nwi;
5874         int i;
5875         struct sctp_iterator *it, *nit;
5876
5877         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5878                 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5879                 return;
5880         }
5881         SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5882         /*
5883          * In FreeBSD the iterator thread never exits but we do clean up.
5884          * The only way FreeBSD reaches here is if we have VRF's but we
5885          * still add the ifdef to make it compile on old versions.
5886          */
5887 retry:
5888         SCTP_IPI_ITERATOR_WQ_LOCK();
5889         /*
5890          * sctp_iterator_worker() might be working on an it entry without
5891          * holding the lock.  We won't find it on the list either and
5892          * continue and free/destroy it.  While holding the lock, spin, to
5893          * avoid the race condition as sctp_iterator_worker() will have to
5894          * wait to re-acquire the lock.
5895          */
5896         if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5897                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5898                 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5899                     "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5900                 DELAY(10);
5901                 goto retry;
5902         }
5903         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5904                 if (it->vn != curvnet) {
5905                         continue;
5906                 }
5907                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5908                 if (it->function_atend != NULL) {
5909                         (*it->function_atend) (it->pointer, it->val);
5910                 }
5911                 SCTP_FREE(it, SCTP_M_ITER);
5912         }
5913         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5914         SCTP_ITERATOR_LOCK();
5915         if ((sctp_it_ctl.cur_it) &&
5916             (sctp_it_ctl.cur_it->vn == curvnet)) {
5917                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5918         }
5919         SCTP_ITERATOR_UNLOCK();
5920         SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5921         SCTP_WQ_ADDR_LOCK();
5922         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5923                 LIST_REMOVE(wi, sctp_nxt_addr);
5924                 SCTP_DECR_LADDR_COUNT();
5925                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5926                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
5927                 }
5928                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5929         }
5930         SCTP_WQ_ADDR_UNLOCK();
5931
5932         /*
5933          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5934          * destroyed first).
5935          */
5936         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5937         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5938                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5939                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5940                                 /* free the ifa */
5941                                 LIST_REMOVE(ifa, next_bucket);
5942                                 LIST_REMOVE(ifa, next_ifa);
5943                                 SCTP_FREE(ifa, SCTP_M_IFA);
5944                         }
5945                         /* free the ifn */
5946                         LIST_REMOVE(ifn, next_bucket);
5947                         LIST_REMOVE(ifn, next_ifn);
5948                         SCTP_FREE(ifn, SCTP_M_IFN);
5949                 }
5950                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5951                 /* free the vrf */
5952                 LIST_REMOVE(vrf, next_vrf);
5953                 SCTP_FREE(vrf, SCTP_M_VRF);
5954         }
5955         /* free the vrf hashes */
5956         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5957         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5958
5959         /*
5960          * free the TIMEWAIT list elements malloc'd in the function
5961          * sctp_add_vtag_to_timewait()...
5962          */
5963         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5964                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5965                 if (!LIST_EMPTY(chain)) {
5966                         prev_twait_block = NULL;
5967                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5968                                 if (prev_twait_block) {
5969                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5970                                 }
5971                                 prev_twait_block = twait_block;
5972                         }
5973                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5974                 }
5975         }
5976
5977         /* free the locks and mutexes */
5978 #ifdef SCTP_PACKET_LOGGING
5979         SCTP_IP_PKTLOG_DESTROY();
5980 #endif
5981         SCTP_IPI_ADDR_DESTROY();
5982         SCTP_STATLOG_DESTROY();
5983         SCTP_INP_INFO_LOCK_DESTROY();
5984
5985         SCTP_WQ_ADDR_DESTROY();
5986
5987         /* Get rid of other stuff too. */
5988         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5989                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5990         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5991                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5992         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5993                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5994
5995         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5996         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5997         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5998         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5999         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6000         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6001         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6002         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6003         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6004 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6005         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6006 #endif
6007 }
6008
6009
6010 int
6011 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6012     int offset, int limit,
6013     struct sockaddr *src, struct sockaddr *dst,
6014     struct sockaddr *altsa, uint16_t port)
6015 {
6016         /*
6017          * grub through the INIT pulling addresses and loading them to the
6018          * nets structure in the asoc. The from address in the mbuf should
6019          * also be loaded (if it is not already). This routine can be called
6020          * with either INIT or INIT-ACK's as long as the m points to the IP
6021          * packet and the offset points to the beginning of the parameters.
6022          */
6023         struct sctp_inpcb *inp;
6024         struct sctp_nets *net, *nnet, *net_tmp;
6025         struct sctp_paramhdr *phdr, param_buf;
6026         struct sctp_tcb *stcb_tmp;
6027         uint16_t ptype, plen;
6028         struct sockaddr *sa;
6029         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6030         struct sctp_auth_random *p_random = NULL;
6031         uint16_t random_len = 0;
6032         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6033         struct sctp_auth_hmac_algo *hmacs = NULL;
6034         uint16_t hmacs_len = 0;
6035         uint8_t saw_asconf = 0;
6036         uint8_t saw_asconf_ack = 0;
6037         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6038         struct sctp_auth_chunk_list *chunks = NULL;
6039         uint16_t num_chunks = 0;
6040         sctp_key_t *new_key;
6041         uint32_t keylen;
6042         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6043         uint8_t peer_supports_ecn;
6044         uint8_t peer_supports_prsctp;
6045         uint8_t peer_supports_auth;
6046         uint8_t peer_supports_asconf;
6047         uint8_t peer_supports_asconf_ack;
6048         uint8_t peer_supports_reconfig;
6049         uint8_t peer_supports_nrsack;
6050         uint8_t peer_supports_pktdrop;
6051         uint8_t peer_supports_idata;
6052 #ifdef INET
6053         struct sockaddr_in sin;
6054 #endif
6055 #ifdef INET6
6056         struct sockaddr_in6 sin6;
6057 #endif
6058
6059         /* First get the destination address setup too. */
6060 #ifdef INET
6061         memset(&sin, 0, sizeof(sin));
6062         sin.sin_family = AF_INET;
6063         sin.sin_len = sizeof(sin);
6064         sin.sin_port = stcb->rport;
6065 #endif
6066 #ifdef INET6
6067         memset(&sin6, 0, sizeof(sin6));
6068         sin6.sin6_family = AF_INET6;
6069         sin6.sin6_len = sizeof(struct sockaddr_in6);
6070         sin6.sin6_port = stcb->rport;
6071 #endif
6072         if (altsa) {
6073                 sa = altsa;
6074         } else {
6075                 sa = src;
6076         }
6077         peer_supports_idata = 0;
6078         peer_supports_ecn = 0;
6079         peer_supports_prsctp = 0;
6080         peer_supports_auth = 0;
6081         peer_supports_asconf = 0;
6082         peer_supports_reconfig = 0;
6083         peer_supports_nrsack = 0;
6084         peer_supports_pktdrop = 0;
6085         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6086                 /* mark all addresses that we have currently on the list */
6087                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6088         }
6089         /* does the source address already exist? if so skip it */
6090         inp = stcb->sctp_ep;
6091         atomic_add_int(&stcb->asoc.refcnt, 1);
6092         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6093         atomic_add_int(&stcb->asoc.refcnt, -1);
6094
6095         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6096                 /* we must add the source address */
6097                 /* no scope set here since we have a tcb already. */
6098                 switch (sa->sa_family) {
6099 #ifdef INET
6100                 case AF_INET:
6101                         if (stcb->asoc.scope.ipv4_addr_legal) {
6102                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6103                                         return (-1);
6104                                 }
6105                         }
6106                         break;
6107 #endif
6108 #ifdef INET6
6109                 case AF_INET6:
6110                         if (stcb->asoc.scope.ipv6_addr_legal) {
6111                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6112                                         return (-2);
6113                                 }
6114                         }
6115                         break;
6116 #endif
6117                 default:
6118                         break;
6119                 }
6120         } else {
6121                 if (net_tmp != NULL && stcb_tmp == stcb) {
6122                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6123                 } else if (stcb_tmp != stcb) {
6124                         /* It belongs to another association? */
6125                         if (stcb_tmp)
6126                                 SCTP_TCB_UNLOCK(stcb_tmp);
6127                         return (-3);
6128                 }
6129         }
6130         if (stcb->asoc.state == 0) {
6131                 /* the assoc was freed? */
6132                 return (-4);
6133         }
6134         /* now we must go through each of the params. */
6135         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
6136         while (phdr) {
6137                 ptype = ntohs(phdr->param_type);
6138                 plen = ntohs(phdr->param_length);
6139                 /*
6140                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6141                  * (uint32_t)ptype, (int)plen);
6142                  */
6143                 if (offset + plen > limit) {
6144                         break;
6145                 }
6146                 if (plen < sizeof(struct sctp_paramhdr)) {
6147                         break;
6148                 }
6149 #ifdef INET
6150                 if (ptype == SCTP_IPV4_ADDRESS) {
6151                         if (stcb->asoc.scope.ipv4_addr_legal) {
6152                                 struct sctp_ipv4addr_param *p4, p4_buf;
6153
6154                                 /* ok get the v4 address and check/add */
6155                                 phdr = sctp_get_next_param(m, offset,
6156                                     (struct sctp_paramhdr *)&p4_buf,
6157                                     sizeof(p4_buf));
6158                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6159                                     phdr == NULL) {
6160                                         return (-5);
6161                                 }
6162                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6163                                 sin.sin_addr.s_addr = p4->addr;
6164                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6165                                         /* Skip multi-cast addresses */
6166                                         goto next_param;
6167                                 }
6168                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6169                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6170                                         goto next_param;
6171                                 }
6172                                 sa = (struct sockaddr *)&sin;
6173                                 inp = stcb->sctp_ep;
6174                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6175                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6176                                     dst, stcb);
6177                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6178
6179                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6180                                     inp == NULL) {
6181                                         /* we must add the source address */
6182                                         /*
6183                                          * no scope set since we have a tcb
6184                                          * already
6185                                          */
6186
6187                                         /*
6188                                          * we must validate the state again
6189                                          * here
6190                                          */
6191                         add_it_now:
6192                                         if (stcb->asoc.state == 0) {
6193                                                 /* the assoc was freed? */
6194                                                 return (-7);
6195                                         }
6196                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6197                                                 return (-8);
6198                                         }
6199                                 } else if (stcb_tmp == stcb) {
6200                                         if (stcb->asoc.state == 0) {
6201                                                 /* the assoc was freed? */
6202                                                 return (-10);
6203                                         }
6204                                         if (net != NULL) {
6205                                                 /* clear flag */
6206                                                 net->dest_state &=
6207                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6208                                         }
6209                                 } else {
6210                                         /*
6211                                          * strange, address is in another
6212                                          * assoc? straighten out locks.
6213                                          */
6214                                         if (stcb_tmp) {
6215                                                 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6216                                                         struct mbuf *op_err;
6217                                                         char msg[SCTP_DIAG_INFO_LEN];
6218
6219                                                         /*
6220                                                          * in setup state we
6221                                                          * abort this guy
6222                                                          */
6223                                                         SCTP_SNPRINTF(msg, sizeof(msg),
6224                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6225                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6226                                                             msg);
6227                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6228                                                             stcb_tmp, op_err,
6229                                                             SCTP_SO_NOT_LOCKED);
6230                                                         goto add_it_now;
6231                                                 }
6232                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6233                                         }
6234
6235                                         if (stcb->asoc.state == 0) {
6236                                                 /* the assoc was freed? */
6237                                                 return (-12);
6238                                         }
6239                                         return (-13);
6240                                 }
6241                         }
6242                 } else
6243 #endif
6244 #ifdef INET6
6245                 if (ptype == SCTP_IPV6_ADDRESS) {
6246                         if (stcb->asoc.scope.ipv6_addr_legal) {
6247                                 /* ok get the v6 address and check/add */
6248                                 struct sctp_ipv6addr_param *p6, p6_buf;
6249
6250                                 phdr = sctp_get_next_param(m, offset,
6251                                     (struct sctp_paramhdr *)&p6_buf,
6252                                     sizeof(p6_buf));
6253                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6254                                     phdr == NULL) {
6255                                         return (-14);
6256                                 }
6257                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6258                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6259                                     sizeof(p6->addr));
6260                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6261                                         /* Skip multi-cast addresses */
6262                                         goto next_param;
6263                                 }
6264                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6265                                         /*
6266                                          * Link local make no sense without
6267                                          * scope
6268                                          */
6269                                         goto next_param;
6270                                 }
6271                                 sa = (struct sockaddr *)&sin6;
6272                                 inp = stcb->sctp_ep;
6273                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6274                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6275                                     dst, stcb);
6276                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6277                                 if (stcb_tmp == NULL &&
6278                                     (inp == stcb->sctp_ep || inp == NULL)) {
6279                                         /*
6280                                          * we must validate the state again
6281                                          * here
6282                                          */
6283                         add_it_now6:
6284                                         if (stcb->asoc.state == 0) {
6285                                                 /* the assoc was freed? */
6286                                                 return (-16);
6287                                         }
6288                                         /*
6289                                          * we must add the address, no scope
6290                                          * set
6291                                          */
6292                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6293                                                 return (-17);
6294                                         }
6295                                 } else if (stcb_tmp == stcb) {
6296                                         /*
6297                                          * we must validate the state again
6298                                          * here
6299                                          */
6300                                         if (stcb->asoc.state == 0) {
6301                                                 /* the assoc was freed? */
6302                                                 return (-19);
6303                                         }
6304                                         if (net != NULL) {
6305                                                 /* clear flag */
6306                                                 net->dest_state &=
6307                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6308                                         }
6309                                 } else {
6310                                         /*
6311                                          * strange, address is in another
6312                                          * assoc? straighten out locks.
6313                                          */
6314                                         if (stcb_tmp) {
6315                                                 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6316                                                         struct mbuf *op_err;
6317                                                         char msg[SCTP_DIAG_INFO_LEN];
6318
6319                                                         /*
6320                                                          * in setup state we
6321                                                          * abort this guy
6322                                                          */
6323                                                         SCTP_SNPRINTF(msg, sizeof(msg),
6324                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6325                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6326                                                             msg);
6327                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6328                                                             stcb_tmp, op_err,
6329                                                             SCTP_SO_NOT_LOCKED);
6330                                                         goto add_it_now6;
6331                                                 }
6332                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6333                                         }
6334                                         if (stcb->asoc.state == 0) {
6335                                                 /* the assoc was freed? */
6336                                                 return (-21);
6337                                         }
6338                                         return (-22);
6339                                 }
6340                         }
6341                 } else
6342 #endif
6343                 if (ptype == SCTP_ECN_CAPABLE) {
6344                         peer_supports_ecn = 1;
6345                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6346                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6347                                 struct sctp_adaptation_layer_indication ai,
6348                                                                 *aip;
6349
6350                                 phdr = sctp_get_next_param(m, offset,
6351                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6352                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6353                                 if (aip) {
6354                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6355                                         stcb->asoc.adaptation_needed = 1;
6356                                 }
6357                         }
6358                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6359                         struct sctp_asconf_addr_param lstore, *fee;
6360                         int lptype;
6361                         struct sockaddr *lsa = NULL;
6362 #ifdef INET
6363                         struct sctp_asconf_addrv4_param *fii;
6364 #endif
6365
6366                         if (stcb->asoc.asconf_supported == 0) {
6367                                 return (-100);
6368                         }
6369                         if (plen > sizeof(lstore)) {
6370                                 return (-23);
6371                         }
6372                         if (plen < sizeof(struct sctp_asconf_addrv4_param)) {
6373                                 return (-101);
6374                         }
6375                         phdr = sctp_get_next_param(m, offset,
6376                             (struct sctp_paramhdr *)&lstore,
6377                             plen);
6378                         if (phdr == NULL) {
6379                                 return (-24);
6380                         }
6381                         fee = (struct sctp_asconf_addr_param *)phdr;
6382                         lptype = ntohs(fee->addrp.ph.param_type);
6383                         switch (lptype) {
6384 #ifdef INET
6385                         case SCTP_IPV4_ADDRESS:
6386                                 if (plen !=
6387                                     sizeof(struct sctp_asconf_addrv4_param)) {
6388                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6389                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6390                                             plen);
6391                                 } else {
6392                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6393                                         sin.sin_addr.s_addr = fii->addrp.addr;
6394                                         lsa = (struct sockaddr *)&sin;
6395                                 }
6396                                 break;
6397 #endif
6398 #ifdef INET6
6399                         case SCTP_IPV6_ADDRESS:
6400                                 if (plen !=
6401                                     sizeof(struct sctp_asconf_addr_param)) {
6402                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6403                                             (int)sizeof(struct sctp_asconf_addr_param),
6404                                             plen);
6405                                 } else {
6406                                         memcpy(sin6.sin6_addr.s6_addr,
6407                                             fee->addrp.addr,
6408                                             sizeof(fee->addrp.addr));
6409                                         lsa = (struct sockaddr *)&sin6;
6410                                 }
6411                                 break;
6412 #endif
6413                         default:
6414                                 break;
6415                         }
6416                         if (lsa) {
6417                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6418                         }
6419                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6420                         stcb->asoc.peer_supports_nat = 1;
6421                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6422                         /* Peer supports pr-sctp */
6423                         peer_supports_prsctp = 1;
6424                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6425                         /* A supported extension chunk */
6426                         struct sctp_supported_chunk_types_param *pr_supported;
6427                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6428                         int num_ent, i;
6429
6430                         if (plen > sizeof(local_store)) {
6431                                 return (-35);
6432                         }
6433                         phdr = sctp_get_next_param(m, offset,
6434                             (struct sctp_paramhdr *)&local_store, plen);
6435                         if (phdr == NULL) {
6436                                 return (-25);
6437                         }
6438                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6439                         num_ent = plen - sizeof(struct sctp_paramhdr);
6440                         for (i = 0; i < num_ent; i++) {
6441                                 switch (pr_supported->chunk_types[i]) {
6442                                 case SCTP_ASCONF:
6443                                         peer_supports_asconf = 1;
6444                                         break;
6445                                 case SCTP_ASCONF_ACK:
6446                                         peer_supports_asconf_ack = 1;
6447                                         break;
6448                                 case SCTP_FORWARD_CUM_TSN:
6449                                         peer_supports_prsctp = 1;
6450                                         break;
6451                                 case SCTP_PACKET_DROPPED:
6452                                         peer_supports_pktdrop = 1;
6453                                         break;
6454                                 case SCTP_NR_SELECTIVE_ACK:
6455                                         peer_supports_nrsack = 1;
6456                                         break;
6457                                 case SCTP_STREAM_RESET:
6458                                         peer_supports_reconfig = 1;
6459                                         break;
6460                                 case SCTP_AUTHENTICATION:
6461                                         peer_supports_auth = 1;
6462                                         break;
6463                                 case SCTP_IDATA:
6464                                         peer_supports_idata = 1;
6465                                         break;
6466                                 default:
6467                                         /* one I have not learned yet */
6468                                         break;
6469
6470                                 }
6471                         }
6472                 } else if (ptype == SCTP_RANDOM) {
6473                         if (plen > sizeof(random_store))
6474                                 break;
6475                         if (got_random) {
6476                                 /* already processed a RANDOM */
6477                                 goto next_param;
6478                         }
6479                         phdr = sctp_get_next_param(m, offset,
6480                             (struct sctp_paramhdr *)random_store,
6481                             plen);
6482                         if (phdr == NULL)
6483                                 return (-26);
6484                         p_random = (struct sctp_auth_random *)phdr;
6485                         random_len = plen - sizeof(*p_random);
6486                         /* enforce the random length */
6487                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6488                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6489                                 return (-27);
6490                         }
6491                         got_random = 1;
6492                 } else if (ptype == SCTP_HMAC_LIST) {
6493                         uint16_t num_hmacs;
6494                         uint16_t i;
6495
6496                         if (plen > sizeof(hmacs_store))
6497                                 break;
6498                         if (got_hmacs) {
6499                                 /* already processed a HMAC list */
6500                                 goto next_param;
6501                         }
6502                         phdr = sctp_get_next_param(m, offset,
6503                             (struct sctp_paramhdr *)hmacs_store,
6504                             plen);
6505                         if (phdr == NULL)
6506                                 return (-28);
6507                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6508                         hmacs_len = plen - sizeof(*hmacs);
6509                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6510                         /* validate the hmac list */
6511                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6512                                 return (-29);
6513                         }
6514                         if (stcb->asoc.peer_hmacs != NULL)
6515                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6516                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6517                         if (stcb->asoc.peer_hmacs != NULL) {
6518                                 for (i = 0; i < num_hmacs; i++) {
6519                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6520                                             ntohs(hmacs->hmac_ids[i]));
6521                                 }
6522                         }
6523                         got_hmacs = 1;
6524                 } else if (ptype == SCTP_CHUNK_LIST) {
6525                         int i;
6526
6527                         if (plen > sizeof(chunks_store))
6528                                 break;
6529                         if (got_chklist) {
6530                                 /* already processed a Chunks list */
6531                                 goto next_param;
6532                         }
6533                         phdr = sctp_get_next_param(m, offset,
6534                             (struct sctp_paramhdr *)chunks_store,
6535                             plen);
6536                         if (phdr == NULL)
6537                                 return (-30);
6538                         chunks = (struct sctp_auth_chunk_list *)phdr;
6539                         num_chunks = plen - sizeof(*chunks);
6540                         if (stcb->asoc.peer_auth_chunks != NULL)
6541                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6542                         else
6543                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6544                         for (i = 0; i < num_chunks; i++) {
6545                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6546                                     stcb->asoc.peer_auth_chunks);
6547                                 /* record asconf/asconf-ack if listed */
6548                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6549                                         saw_asconf = 1;
6550                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6551                                         saw_asconf_ack = 1;
6552
6553                         }
6554                         got_chklist = 1;
6555                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6556                             (ptype == SCTP_STATE_COOKIE) ||
6557                             (ptype == SCTP_UNRECOG_PARAM) ||
6558                             (ptype == SCTP_COOKIE_PRESERVE) ||
6559                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6560                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6561                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6562                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6563                     (ptype == SCTP_SUCCESS_REPORT)) {
6564                          /* don't care */ ;
6565                 } else {
6566                         if ((ptype & 0x8000) == 0x0000) {
6567                                 /*
6568                                  * must stop processing the rest of the
6569                                  * param's. Any report bits were handled
6570                                  * with the call to
6571                                  * sctp_arethere_unrecognized_parameters()
6572                                  * when the INIT or INIT-ACK was first seen.
6573                                  */
6574                                 break;
6575                         }
6576                 }
6577
6578 next_param:
6579                 offset += SCTP_SIZE32(plen);
6580                 if (offset >= limit) {
6581                         break;
6582                 }
6583                 phdr = sctp_get_next_param(m, offset, &param_buf,
6584                     sizeof(param_buf));
6585         }
6586         /* Now check to see if we need to purge any addresses */
6587         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6588                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6589                     SCTP_ADDR_NOT_IN_ASSOC) {
6590                         /* This address has been removed from the asoc */
6591                         /* remove and free it */
6592                         stcb->asoc.numnets--;
6593                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6594                         sctp_free_remote_addr(net);
6595                         if (net == stcb->asoc.primary_destination) {
6596                                 stcb->asoc.primary_destination = NULL;
6597                                 sctp_select_primary_destination(stcb);
6598                         }
6599                 }
6600         }
6601         if ((stcb->asoc.ecn_supported == 1) &&
6602             (peer_supports_ecn == 0)) {
6603                 stcb->asoc.ecn_supported = 0;
6604         }
6605         if ((stcb->asoc.prsctp_supported == 1) &&
6606             (peer_supports_prsctp == 0)) {
6607                 stcb->asoc.prsctp_supported = 0;
6608         }
6609         if ((stcb->asoc.auth_supported == 1) &&
6610             ((peer_supports_auth == 0) ||
6611             (got_random == 0) || (got_hmacs == 0))) {
6612                 stcb->asoc.auth_supported = 0;
6613         }
6614         if ((stcb->asoc.asconf_supported == 1) &&
6615             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6616             (stcb->asoc.auth_supported == 0) ||
6617             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6618                 stcb->asoc.asconf_supported = 0;
6619         }
6620         if ((stcb->asoc.reconfig_supported == 1) &&
6621             (peer_supports_reconfig == 0)) {
6622                 stcb->asoc.reconfig_supported = 0;
6623         }
6624         if ((stcb->asoc.idata_supported == 1) &&
6625             (peer_supports_idata == 0)) {
6626                 stcb->asoc.idata_supported = 0;
6627         }
6628         if ((stcb->asoc.nrsack_supported == 1) &&
6629             (peer_supports_nrsack == 0)) {
6630                 stcb->asoc.nrsack_supported = 0;
6631         }
6632         if ((stcb->asoc.pktdrop_supported == 1) &&
6633             (peer_supports_pktdrop == 0)) {
6634                 stcb->asoc.pktdrop_supported = 0;
6635         }
6636         /* validate authentication required parameters */
6637         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6638                 /* peer does not support auth but sent a chunks list? */
6639                 return (-31);
6640         }
6641         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6642                 /* peer supports asconf but not auth? */
6643                 return (-32);
6644         } else if ((peer_supports_asconf == 1) &&
6645                     (peer_supports_auth == 1) &&
6646             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6647                 return (-33);
6648         }
6649         /* concatenate the full random key */
6650         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6651         if (chunks != NULL) {
6652                 keylen += sizeof(*chunks) + num_chunks;
6653         }
6654         new_key = sctp_alloc_key(keylen);
6655         if (new_key != NULL) {
6656                 /* copy in the RANDOM */
6657                 if (p_random != NULL) {
6658                         keylen = sizeof(*p_random) + random_len;
6659                         memcpy(new_key->key, p_random, keylen);
6660                 } else {
6661                         keylen = 0;
6662                 }
6663                 /* append in the AUTH chunks */
6664                 if (chunks != NULL) {
6665                         memcpy(new_key->key + keylen, chunks,
6666                             sizeof(*chunks) + num_chunks);
6667                         keylen += sizeof(*chunks) + num_chunks;
6668                 }
6669                 /* append in the HMACs */
6670                 if (hmacs != NULL) {
6671                         memcpy(new_key->key + keylen, hmacs,
6672                             sizeof(*hmacs) + hmacs_len);
6673                 }
6674         } else {
6675                 /* failed to get memory for the key */
6676                 return (-34);
6677         }
6678         if (stcb->asoc.authinfo.peer_random != NULL)
6679                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6680         stcb->asoc.authinfo.peer_random = new_key;
6681         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6682         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6683
6684         return (0);
6685 }
6686
6687 int
6688 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6689     struct sctp_nets *net)
6690 {
6691         /* make sure the requested primary address exists in the assoc */
6692         if (net == NULL && sa)
6693                 net = sctp_findnet(stcb, sa);
6694
6695         if (net == NULL) {
6696                 /* didn't find the requested primary address! */
6697                 return (-1);
6698         } else {
6699                 /* set the primary address */
6700                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6701                         /* Must be confirmed, so queue to set */
6702                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6703                         return (0);
6704                 }
6705                 stcb->asoc.primary_destination = net;
6706                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6707                         sctp_free_remote_addr(stcb->asoc.alternate);
6708                         stcb->asoc.alternate = NULL;
6709                 }
6710                 net = TAILQ_FIRST(&stcb->asoc.nets);
6711                 if (net != stcb->asoc.primary_destination) {
6712                         /*
6713                          * first one on the list is NOT the primary
6714                          * sctp_cmpaddr() is much more efficient if the
6715                          * primary is the first on the list, make it so.
6716                          */
6717                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6718                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6719                 }
6720                 return (0);
6721         }
6722 }
6723
6724 int
6725 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6726 {
6727         /*
6728          * This function serves two purposes. It will see if a TAG can be
6729          * re-used and return 1 for yes it is ok and 0 for don't use that
6730          * tag. A secondary function it will do is purge out old tags that
6731          * can be removed.
6732          */
6733         struct sctpvtaghead *chain;
6734         struct sctp_tagblock *twait_block;
6735         struct sctpasochead *head;
6736         struct sctp_tcb *stcb;
6737         int i;
6738
6739         SCTP_INP_INFO_RLOCK();
6740         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6741             SCTP_BASE_INFO(hashasocmark))];
6742         LIST_FOREACH(stcb, head, sctp_asocs) {
6743                 /*
6744                  * We choose not to lock anything here. TCB's can't be
6745                  * removed since we have the read lock, so they can't be
6746                  * freed on us, same thing for the INP. I may be wrong with
6747                  * this assumption, but we will go with it for now :-)
6748                  */
6749                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6750                         continue;
6751                 }
6752                 if (stcb->asoc.my_vtag == tag) {
6753                         /* candidate */
6754                         if (stcb->rport != rport) {
6755                                 continue;
6756                         }
6757                         if (stcb->sctp_ep->sctp_lport != lport) {
6758                                 continue;
6759                         }
6760                         /* Its a used tag set */
6761                         SCTP_INP_INFO_RUNLOCK();
6762                         return (0);
6763                 }
6764         }
6765         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6766         /* Now what about timed wait ? */
6767         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6768                 /*
6769                  * Block(s) are present, lets see if we have this tag in the
6770                  * list
6771                  */
6772                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6773                         if (twait_block->vtag_block[i].v_tag == 0) {
6774                                 /* not used */
6775                                 continue;
6776                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6777                             now->tv_sec) {
6778                                 /* Audit expires this guy */
6779                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6780                                 twait_block->vtag_block[i].v_tag = 0;
6781                                 twait_block->vtag_block[i].lport = 0;
6782                                 twait_block->vtag_block[i].rport = 0;
6783                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6784                                     (twait_block->vtag_block[i].lport == lport) &&
6785                             (twait_block->vtag_block[i].rport == rport)) {
6786                                 /* Bad tag, sorry :< */
6787                                 SCTP_INP_INFO_RUNLOCK();
6788                                 return (0);
6789                         }
6790                 }
6791         }
6792         SCTP_INP_INFO_RUNLOCK();
6793         return (1);
6794 }
6795
6796 static void
6797 sctp_drain_mbufs(struct sctp_tcb *stcb)
6798 {
6799         /*
6800          * We must hunt this association for MBUF's past the cumack (i.e.
6801          * out of order data that we can renege on).
6802          */
6803         struct sctp_association *asoc;
6804         struct sctp_tmit_chunk *chk, *nchk;
6805         uint32_t cumulative_tsn_p1;
6806         struct sctp_queued_to_read *control, *ncontrol;
6807         int cnt, strmat;
6808         uint32_t gap, i;
6809         int fnd = 0;
6810
6811         /* We look for anything larger than the cum-ack + 1 */
6812
6813         asoc = &stcb->asoc;
6814         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6815                 /* none we can reneg on. */
6816                 return;
6817         }
6818         SCTP_STAT_INCR(sctps_protocol_drains_done);
6819         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6820         cnt = 0;
6821         /* Ok that was fun, now we will drain all the inbound streams? */
6822         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6823                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) {
6824 #ifdef INVARIANTS
6825                         if (control->on_strm_q != SCTP_ON_ORDERED) {
6826                                 panic("Huh control: %p on_q: %d -- not ordered?",
6827                                     control, control->on_strm_q);
6828                         }
6829 #endif
6830                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6831                                 /* Yep it is above cum-ack */
6832                                 cnt++;
6833                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6834                                 KASSERT(control->length > 0, ("control has zero length"));
6835                                 if (asoc->size_on_all_streams >= control->length) {
6836                                         asoc->size_on_all_streams -= control->length;
6837                                 } else {
6838 #ifdef INVARIANTS
6839                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6840 #else
6841                                         asoc->size_on_all_streams = 0;
6842 #endif
6843                                 }
6844                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6845                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6846                                 if (control->on_read_q) {
6847                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6848                                         control->on_read_q = 0;
6849                                 }
6850                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm);
6851                                 control->on_strm_q = 0;
6852                                 if (control->data) {
6853                                         sctp_m_freem(control->data);
6854                                         control->data = NULL;
6855                                 }
6856                                 sctp_free_remote_addr(control->whoFrom);
6857                                 /* Now its reasm? */
6858                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6859                                         cnt++;
6860                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6861                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6862                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6863                                                 asoc->size_on_reasm_queue -= chk->send_size;
6864                                         } else {
6865 #ifdef INVARIANTS
6866                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6867 #else
6868                                                 asoc->size_on_reasm_queue = 0;
6869 #endif
6870                                         }
6871                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6872                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6873                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6874                                         if (chk->data) {
6875                                                 sctp_m_freem(chk->data);
6876                                                 chk->data = NULL;
6877                                         }
6878                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6879                                 }
6880                                 sctp_free_a_readq(stcb, control);
6881                         }
6882                 }
6883                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) {
6884 #ifdef INVARIANTS
6885                         if (control->on_strm_q != SCTP_ON_UNORDERED) {
6886                                 panic("Huh control: %p on_q: %d -- not unordered?",
6887                                     control, control->on_strm_q);
6888                         }
6889 #endif
6890                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6891                                 /* Yep it is above cum-ack */
6892                                 cnt++;
6893                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6894                                 KASSERT(control->length > 0, ("control has zero length"));
6895                                 if (asoc->size_on_all_streams >= control->length) {
6896                                         asoc->size_on_all_streams -= control->length;
6897                                 } else {
6898 #ifdef INVARIANTS
6899                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6900 #else
6901                                         asoc->size_on_all_streams = 0;
6902 #endif
6903                                 }
6904                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6905                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6906                                 if (control->on_read_q) {
6907                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6908                                         control->on_read_q = 0;
6909                                 }
6910                                 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm);
6911                                 control->on_strm_q = 0;
6912                                 if (control->data) {
6913                                         sctp_m_freem(control->data);
6914                                         control->data = NULL;
6915                                 }
6916                                 sctp_free_remote_addr(control->whoFrom);
6917                                 /* Now its reasm? */
6918                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6919                                         cnt++;
6920                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6921                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6922                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6923                                                 asoc->size_on_reasm_queue -= chk->send_size;
6924                                         } else {
6925 #ifdef INVARIANTS
6926                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6927 #else
6928                                                 asoc->size_on_reasm_queue = 0;
6929 #endif
6930                                         }
6931                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6932                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6933                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6934                                         if (chk->data) {
6935                                                 sctp_m_freem(chk->data);
6936                                                 chk->data = NULL;
6937                                         }
6938                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6939                                 }
6940                                 sctp_free_a_readq(stcb, control);
6941                         }
6942                 }
6943         }
6944         if (cnt) {
6945                 /* We must back down to see what the new highest is */
6946                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6947                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6948                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6949                                 asoc->highest_tsn_inside_map = i;
6950                                 fnd = 1;
6951                                 break;
6952                         }
6953                 }
6954                 if (!fnd) {
6955                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6956                 }
6957
6958                 /*
6959                  * Question, should we go through the delivery queue? The
6960                  * only reason things are on here is the app not reading OR
6961                  * a p-d-api up. An attacker COULD send enough in to
6962                  * initiate the PD-API and then send a bunch of stuff to
6963                  * other streams... these would wind up on the delivery
6964                  * queue.. and then we would not get to them. But in order
6965                  * to do this I then have to back-track and un-deliver
6966                  * sequence numbers in streams.. el-yucko. I think for now
6967                  * we will NOT look at the delivery queue and leave it to be
6968                  * something to consider later. An alternative would be to
6969                  * abort the P-D-API with a notification and then deliver
6970                  * the data.... Or another method might be to keep track of
6971                  * how many times the situation occurs and if we see a
6972                  * possible attack underway just abort the association.
6973                  */
6974 #ifdef SCTP_DEBUG
6975                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6976 #endif
6977                 /*
6978                  * Now do we need to find a new
6979                  * asoc->highest_tsn_inside_map?
6980                  */
6981                 asoc->last_revoke_count = cnt;
6982                 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
6983                     SCTP_FROM_SCTP_PCB + SCTP_LOC_11);
6984                 /* sa_ignore NO_NULL_CHK */
6985                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6986                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6987         }
6988         /*
6989          * Another issue, in un-setting the TSN's in the mapping array we
6990          * DID NOT adjust the highest_tsn marker.  This will cause one of
6991          * two things to occur. It may cause us to do extra work in checking
6992          * for our mapping array movement. More importantly it may cause us
6993          * to SACK every datagram. This may not be a bad thing though since
6994          * we will recover once we get our cum-ack above and all this stuff
6995          * we dumped recovered.
6996          */
6997 }
6998
6999 void
7000 sctp_drain()
7001 {
7002         /*
7003          * We must walk the PCB lists for ALL associations here. The system
7004          * is LOW on MBUF's and needs help. This is where reneging will
7005          * occur. We really hope this does NOT happen!
7006          */
7007         VNET_ITERATOR_DECL(vnet_iter);
7008         VNET_LIST_RLOCK_NOSLEEP();
7009         VNET_FOREACH(vnet_iter) {
7010                 CURVNET_SET(vnet_iter);
7011                 struct sctp_inpcb *inp;
7012                 struct sctp_tcb *stcb;
7013
7014                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
7015                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7016 #ifdef VIMAGE
7017                         continue;
7018 #else
7019                         return;
7020 #endif
7021                 }
7022                 SCTP_INP_INFO_RLOCK();
7023                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7024                         /* For each endpoint */
7025                         SCTP_INP_RLOCK(inp);
7026                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7027                                 /* For each association */
7028                                 SCTP_TCB_LOCK(stcb);
7029                                 sctp_drain_mbufs(stcb);
7030                                 SCTP_TCB_UNLOCK(stcb);
7031                         }
7032                         SCTP_INP_RUNLOCK(inp);
7033                 }
7034                 SCTP_INP_INFO_RUNLOCK();
7035                 CURVNET_RESTORE();
7036         }
7037         VNET_LIST_RUNLOCK_NOSLEEP();
7038 }
7039
7040 /*
7041  * start a new iterator
7042  * iterates through all endpoints and associations based on the pcb_state
7043  * flags and asoc_state.  "af" (mandatory) is executed for all matching
7044  * assocs and "ef" (optional) is executed when the iterator completes.
7045  * "inpf" (optional) is executed for each new endpoint as it is being
7046  * iterated through. inpe (optional) is called when the inp completes
7047  * its way through all the stcbs.
7048  */
7049 int
7050 sctp_initiate_iterator(inp_func inpf,
7051     asoc_func af,
7052     inp_func inpe,
7053     uint32_t pcb_state,
7054     uint32_t pcb_features,
7055     uint32_t asoc_state,
7056     void *argp,
7057     uint32_t argi,
7058     end_func ef,
7059     struct sctp_inpcb *s_inp,
7060     uint8_t chunk_output_off)
7061 {
7062         struct sctp_iterator *it = NULL;
7063
7064         if (af == NULL) {
7065                 return (-1);
7066         }
7067         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7068                 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7069                     SCTP_BASE_VAR(sctp_pcb_initialized));
7070                 return (-1);
7071         }
7072         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7073             SCTP_M_ITER);
7074         if (it == NULL) {
7075                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7076                 return (-1);
7077         }
7078         memset(it, 0, sizeof(*it));
7079         it->function_assoc = af;
7080         it->function_inp = inpf;
7081         if (inpf)
7082                 it->done_current_ep = 0;
7083         else
7084                 it->done_current_ep = 1;
7085         it->function_atend = ef;
7086         it->pointer = argp;
7087         it->val = argi;
7088         it->pcb_flags = pcb_state;
7089         it->pcb_features = pcb_features;
7090         it->asoc_state = asoc_state;
7091         it->function_inp_end = inpe;
7092         it->no_chunk_output = chunk_output_off;
7093         it->vn = curvnet;
7094         if (s_inp) {
7095                 /* Assume lock is held here */
7096                 it->inp = s_inp;
7097                 SCTP_INP_INCR_REF(it->inp);
7098                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7099         } else {
7100                 SCTP_INP_INFO_RLOCK();
7101                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7102                 if (it->inp) {
7103                         SCTP_INP_INCR_REF(it->inp);
7104                 }
7105                 SCTP_INP_INFO_RUNLOCK();
7106                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7107
7108         }
7109         SCTP_IPI_ITERATOR_WQ_LOCK();
7110         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7111                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7112                 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7113                     SCTP_BASE_VAR(sctp_pcb_initialized), it);
7114                 SCTP_FREE(it, SCTP_M_ITER);
7115                 return (-1);
7116         }
7117         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7118         if (sctp_it_ctl.iterator_running == 0) {
7119                 sctp_wakeup_iterator();
7120         }
7121         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7122         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7123         return (0);
7124 }