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         if (hold_addr_lock == 0)
 303                 SCTP_IPI_ADDR_WUNLOCK();
 304         /* Take away the reference, and possibly free it */
 305         sctp_free_ifn(sctp_ifnp);
 306 }
 307
 308
 309 void
 310 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 311     const char *if_name, uint32_t ifn_index)
 312 {
 313         struct sctp_vrf *vrf;
 314         struct sctp_ifa *sctp_ifap;
 315
 316         SCTP_IPI_ADDR_RLOCK();
 317         vrf = sctp_find_vrf(vrf_id);
 318         if (vrf == NULL) {
 319                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 320                 goto out;
 321
 322         }
 323         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 324         if (sctp_ifap == NULL) {
 325                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 326                 goto out;
 327         }
 328         if (sctp_ifap->ifn_p == NULL) {
 329                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
 330                 goto out;
 331         }
 332         if (if_name) {
 333                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 334                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 335                             sctp_ifap->ifn_p->ifn_name, if_name);
 336                         goto out;
 337                 }
 338         } else {
 339                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 340                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 341                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 342                         goto out;
 343                 }
 344         }
 345
 346         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 347         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 348 out:
 349         SCTP_IPI_ADDR_RUNLOCK();
 350 }
 351
 352
 353 void
 354 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 355     const char *if_name, uint32_t ifn_index)
 356 {
 357         struct sctp_vrf *vrf;
 358         struct sctp_ifa *sctp_ifap;
 359
 360         SCTP_IPI_ADDR_RLOCK();
 361         vrf = sctp_find_vrf(vrf_id);
 362         if (vrf == NULL) {
 363                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 364                 goto out;
 365
 366         }
 367         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 368         if (sctp_ifap == NULL) {
 369                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 370                 goto out;
 371         }
 372         if (sctp_ifap->ifn_p == NULL) {
 373                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
 374                 goto out;
 375         }
 376         if (if_name) {
 377                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 378                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 379                             sctp_ifap->ifn_p->ifn_name, if_name);
 380                         goto out;
 381                 }
 382         } else {
 383                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 384                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 385                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 386                         goto out;
 387                 }
 388         }
 389
 390         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 391         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 392 out:
 393         SCTP_IPI_ADDR_RUNLOCK();
 394 }
 395
 396
 397 /*-
 398  * Add an ifa to an ifn.
 399  * Register the interface as necessary.
 400  * NOTE: ADDR write lock MUST be held.
 401  */
 402 static void
 403 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 404 {
 405         int ifa_af;
 406
 407         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 408         sctp_ifap->ifn_p = sctp_ifnp;
 409         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 410         /* update address counts */
 411         sctp_ifnp->ifa_count++;
 412         ifa_af = sctp_ifap->address.sa.sa_family;
 413         switch (ifa_af) {
 414 #ifdef INET
 415         case AF_INET:
 416                 sctp_ifnp->num_v4++;
 417                 break;
 418 #endif
 419 #ifdef INET6
 420         case AF_INET6:
 421                 sctp_ifnp->num_v6++;
 422                 break;
 423 #endif
 424         default:
 425                 break;
 426         }
 427         if (sctp_ifnp->ifa_count == 1) {
 428                 /* register the new interface */
 429                 sctp_ifnp->registered_af = ifa_af;
 430         }
 431 }
 432
 433
 434 /*-
 435  * Remove an ifa from its ifn.
 436  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 437  * the interface based on the remaining address families left.
 438  * NOTE: ADDR write lock MUST be held.
 439  */
 440 static void
 441 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 442 {
 443         LIST_REMOVE(sctp_ifap, next_ifa);
 444         if (sctp_ifap->ifn_p) {
 445                 /* update address counts */
 446                 sctp_ifap->ifn_p->ifa_count--;
 447                 switch (sctp_ifap->address.sa.sa_family) {
 448 #ifdef INET
 449                 case AF_INET:
 450                         sctp_ifap->ifn_p->num_v4--;
 451                         break;
 452 #endif
 453 #ifdef INET6
 454                 case AF_INET6:
 455                         sctp_ifap->ifn_p->num_v6--;
 456                         break;
 457 #endif
 458                 default:
 459                         break;
 460                 }
 461
 462                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 463                         /* remove the ifn, possibly freeing it */
 464                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 465                 } else {
 466                         /* re-register address family type, if needed */
 467                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 468                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 469                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 470                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 471                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 472                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 473                         }
 474                         /* free the ifn refcount */
 475                         sctp_free_ifn(sctp_ifap->ifn_p);
 476                 }
 477                 sctp_ifap->ifn_p = NULL;
 478         }
 479 }
 480
 481
 482 struct sctp_ifa *
 483 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 484     uint32_t ifn_type, const char *if_name, void *ifa,
 485     struct sockaddr *addr, uint32_t ifa_flags,
 486     int dynamic_add)
 487 {
 488         struct sctp_vrf *vrf;
 489         struct sctp_ifn *sctp_ifnp = NULL;
 490         struct sctp_ifa *sctp_ifap = NULL;
 491         struct sctp_ifalist *hash_addr_head;
 492         struct sctp_ifnlist *hash_ifn_head;
 493         uint32_t hash_of_addr;
 494         int new_ifn_af = 0;
 495
 496 #ifdef SCTP_DEBUG
 497         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 498         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 499 #endif
 500         SCTP_IPI_ADDR_WLOCK();
 501         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 502         if (sctp_ifnp) {
 503                 vrf = sctp_ifnp->vrf;
 504         } else {
 505                 vrf = sctp_find_vrf(vrf_id);
 506                 if (vrf == NULL) {
 507                         vrf = sctp_allocate_vrf(vrf_id);
 508                         if (vrf == NULL) {
 509                                 SCTP_IPI_ADDR_WUNLOCK();
 510                                 return (NULL);
 511                         }
 512                 }
 513         }
 514         if (sctp_ifnp == NULL) {
 515                 /*
 516                  * build one and add it, can't hold lock until after malloc
 517                  * done though.
 518                  */
 519                 SCTP_IPI_ADDR_WUNLOCK();
 520                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 521                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 522                 if (sctp_ifnp == NULL) {
 523 #ifdef INVARIANTS
 524                         panic("No memory for IFN");
 525 #endif
 526                         return (NULL);
 527                 }
 528                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 529                 sctp_ifnp->ifn_index = ifn_index;
 530                 sctp_ifnp->ifn_p = ifn;
 531                 sctp_ifnp->ifn_type = ifn_type;
 532                 sctp_ifnp->refcount = 0;
 533                 sctp_ifnp->vrf = vrf;
 534                 atomic_add_int(&vrf->refcount, 1);
 535                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 536                 if (if_name != NULL) {
 537                         SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
 538                 } else {
 539                         SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
 540                 }
 541                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 542                 LIST_INIT(&sctp_ifnp->ifalist);
 543                 SCTP_IPI_ADDR_WLOCK();
 544                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 545                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 546                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 547                 new_ifn_af = 1;
 548         }
 549         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 550         if (sctp_ifap) {
 551                 /* Hmm, it already exists? */
 552                 if ((sctp_ifap->ifn_p) &&
 553                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 554                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 555                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 556                             (void *)sctp_ifap);
 557                         if (new_ifn_af) {
 558                                 /* Remove the created one that we don't want */
 559                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 560                         }
 561                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 562                                 /* easy to solve, just switch back to active */
 563                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 564                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 565                                 sctp_ifap->ifn_p = sctp_ifnp;
 566                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 567                         }
 568         exit_stage_left:
 569                         SCTP_IPI_ADDR_WUNLOCK();
 570                         return (sctp_ifap);
 571                 } else {
 572                         if (sctp_ifap->ifn_p) {
 573                                 /*
 574                                  * The last IFN gets the address, remove the
 575                                  * old one
 576                                  */
 577                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 578                                     (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 579                                     sctp_ifap->ifn_p->ifn_index, if_name,
 580                                     ifn_index);
 581                                 /* remove the address from the old ifn */
 582                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 583                                 /* move the address over to the new ifn */
 584                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 585                                 goto exit_stage_left;
 586                         } else {
 587                                 /* repair ifnp which was NULL ? */
 588                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 589                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 590                                     (void *)sctp_ifnp, (void *)sctp_ifap);
 591                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 592                         }
 593                         goto exit_stage_left;
 594                 }
 595         }
 596         SCTP_IPI_ADDR_WUNLOCK();
 597         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 598         if (sctp_ifap == NULL) {
 599 #ifdef INVARIANTS
 600                 panic("No memory for IFA");
 601 #endif
 602                 return (NULL);
 603         }
 604         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 605         sctp_ifap->ifn_p = sctp_ifnp;
 606         atomic_add_int(&sctp_ifnp->refcount, 1);
 607         sctp_ifap->vrf_id = vrf_id;
 608         sctp_ifap->ifa = ifa;
 609         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 610         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 611         sctp_ifap->flags = ifa_flags;
 612         /* Set scope */
 613         switch (sctp_ifap->address.sa.sa_family) {
 614 #ifdef INET
 615         case AF_INET:
 616                 {
 617                         struct sockaddr_in *sin;
 618
 619                         sin = &sctp_ifap->address.sin;
 620                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 621                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 622                                 sctp_ifap->src_is_loop = 1;
 623                         }
 624                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 625                                 sctp_ifap->src_is_priv = 1;
 626                         }
 627                         sctp_ifnp->num_v4++;
 628                         if (new_ifn_af)
 629                                 new_ifn_af = AF_INET;
 630                         break;
 631                 }
 632 #endif
 633 #ifdef INET6
 634         case AF_INET6:
 635                 {
 636                         /* ok to use deprecated addresses? */
 637                         struct sockaddr_in6 *sin6;
 638
 639                         sin6 = &sctp_ifap->address.sin6;
 640                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 641                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 642                                 sctp_ifap->src_is_loop = 1;
 643                         }
 644                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 645                                 sctp_ifap->src_is_priv = 1;
 646                         }
 647                         sctp_ifnp->num_v6++;
 648                         if (new_ifn_af)
 649                                 new_ifn_af = AF_INET6;
 650                         break;
 651                 }
 652 #endif
 653         default:
 654                 new_ifn_af = 0;
 655                 break;
 656         }
 657         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 658
 659         if ((sctp_ifap->src_is_priv == 0) &&
 660             (sctp_ifap->src_is_loop == 0)) {
 661                 sctp_ifap->src_is_glob = 1;
 662         }
 663         SCTP_IPI_ADDR_WLOCK();
 664         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 665         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 666         sctp_ifap->refcount = 1;
 667         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 668         sctp_ifnp->ifa_count++;
 669         vrf->total_ifa_count++;
 670         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 671         if (new_ifn_af) {
 672                 sctp_ifnp->registered_af = new_ifn_af;
 673         }
 674         SCTP_IPI_ADDR_WUNLOCK();
 675         if (dynamic_add) {
 676                 /*
 677                  * Bump up the refcount so that when the timer completes it
 678                  * will drop back down.
 679                  */
 680                 struct sctp_laddr *wi;
 681
 682                 atomic_add_int(&sctp_ifap->refcount, 1);
 683                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 684                 if (wi == NULL) {
 685                         /*
 686                          * Gak, what can we do? We have lost an address
 687                          * change can you say HOSED?
 688                          */
 689                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 690                         /* Opps, must decrement the count */
 691                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 692                             if_name);
 693                         return (NULL);
 694                 }
 695                 SCTP_INCR_LADDR_COUNT();
 696                 memset(wi, 0, sizeof(*wi));
 697                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 698                 wi->ifa = sctp_ifap;
 699                 wi->action = SCTP_ADD_IP_ADDRESS;
 700
 701                 SCTP_WQ_ADDR_LOCK();
 702                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 703                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 704                     (struct sctp_inpcb *)NULL,
 705                     (struct sctp_tcb *)NULL,
 706                     (struct sctp_nets *)NULL);
 707                 SCTP_WQ_ADDR_UNLOCK();
 708         } else {
 709                 /* it's ready for use */
 710                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 711         }
 712         return (sctp_ifap);
 713 }
 714
 715 void
 716 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 717     uint32_t ifn_index, const char *if_name)
 718 {
 719         struct sctp_vrf *vrf;
 720         struct sctp_ifa *sctp_ifap = NULL;
 721
 722         SCTP_IPI_ADDR_WLOCK();
 723         vrf = sctp_find_vrf(vrf_id);
 724         if (vrf == NULL) {
 725                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 726                 goto out_now;
 727         }
 728
 729 #ifdef SCTP_DEBUG
 730         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 731         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 732 #endif
 733         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 734         if (sctp_ifap) {
 735                 /* Validate the delete */
 736                 if (sctp_ifap->ifn_p) {
 737                         int valid = 0;
 738
 739                         /*-
 740                          * The name has priority over the ifn_index
 741                          * if its given.
 742                          */
 743                         if (if_name) {
 744                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 745                                         /* They match its a correct delete */
 746                                         valid = 1;
 747                                 }
 748                         }
 749                         if (!valid) {
 750                                 /* last ditch check ifn_index */
 751                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 752                                         valid = 1;
 753                                 }
 754                         }
 755                         if (!valid) {
 756                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 757                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 758                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 759                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 760                                 SCTP_IPI_ADDR_WUNLOCK();
 761                                 return;
 762                         }
 763                 }
 764                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
 765                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 766                 /*
 767                  * We don't set the flag. This means that the structure will
 768                  * hang around in EP's that have bound specific to it until
 769                  * they close. This gives us TCP like behavior if someone
 770                  * removes an address (or for that matter adds it right
 771                  * back).
 772                  */
 773                 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
 774                 vrf->total_ifa_count--;
 775                 LIST_REMOVE(sctp_ifap, next_bucket);
 776                 sctp_remove_ifa_from_ifn(sctp_ifap);
 777         }
 778 #ifdef SCTP_DEBUG
 779         else {
 780                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 781                     ifn_index);
 782                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 783         }
 784 #endif
 785
 786 out_now:
 787         SCTP_IPI_ADDR_WUNLOCK();
 788         if (sctp_ifap) {
 789                 struct sctp_laddr *wi;
 790
 791                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 792                 if (wi == NULL) {
 793                         /*
 794                          * Gak, what can we do? We have lost an address
 795                          * change can you say HOSED?
 796                          */
 797                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 798
 799                         /* Oops, must decrement the count */
 800                         sctp_free_ifa(sctp_ifap);
 801                         return;
 802                 }
 803                 SCTP_INCR_LADDR_COUNT();
 804                 memset(wi, 0, sizeof(*wi));
 805                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 806                 wi->ifa = sctp_ifap;
 807                 wi->action = SCTP_DEL_IP_ADDRESS;
 808                 SCTP_WQ_ADDR_LOCK();
 809                 /*
 810                  * Should this really be a tailq? As it is we will process
 811                  * the newest first :-0
 812                  */
 813                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 814                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 815                     (struct sctp_inpcb *)NULL,
 816                     (struct sctp_tcb *)NULL,
 817                     (struct sctp_nets *)NULL);
 818                 SCTP_WQ_ADDR_UNLOCK();
 819         }
 820         return;
 821 }
 822
 823
 824 static int
 825 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
 826 {
 827         int loopback_scope;
 828 #if defined(INET)
 829         int ipv4_local_scope, ipv4_addr_legal;
 830 #endif
 831 #if defined(INET6)
 832         int local_scope, site_scope, ipv6_addr_legal;
 833 #endif
 834         struct sctp_vrf *vrf;
 835         struct sctp_ifn *sctp_ifn;
 836         struct sctp_ifa *sctp_ifa;
 837
 838         loopback_scope = stcb->asoc.scope.loopback_scope;
 839 #if defined(INET)
 840         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
 841         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
 842 #endif
 843 #if defined(INET6)
 844         local_scope = stcb->asoc.scope.local_scope;
 845         site_scope = stcb->asoc.scope.site_scope;
 846         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
 847 #endif
 848
 849         SCTP_IPI_ADDR_RLOCK();
 850         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
 851         if (vrf == NULL) {
 852                 /* no vrf, no addresses */
 853                 SCTP_IPI_ADDR_RUNLOCK();
 854                 return (0);
 855         }
 856
 857         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 858                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 859                         if ((loopback_scope == 0) &&
 860                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 861                                 continue;
 862                         }
 863                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 864                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
 865                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
 866                                         /*
 867                                          * We allow pending addresses, where
 868                                          * we have sent an asconf-add to be
 869                                          * considered valid.
 870                                          */
 871                                         continue;
 872                                 }
 873                                 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
 874                                         continue;
 875                                 }
 876                                 switch (sctp_ifa->address.sa.sa_family) {
 877 #ifdef INET
 878                                 case AF_INET:
 879                                         if (ipv4_addr_legal) {
 880                                                 struct sockaddr_in *sin,
 881                                                            *rsin;
 882
 883                                                 sin = &sctp_ifa->address.sin;
 884                                                 rsin = (struct sockaddr_in *)to;
 885                                                 if ((ipv4_local_scope == 0) &&
 886                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 887                                                         continue;
 888                                                 }
 889                                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
 890                                                     &sin->sin_addr) != 0) {
 891                                                         continue;
 892                                                 }
 893                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 894                                                         SCTP_IPI_ADDR_RUNLOCK();
 895                                                         return (1);
 896                                                 }
 897                                         }
 898                                         break;
 899 #endif
 900 #ifdef INET6
 901                                 case AF_INET6:
 902                                         if (ipv6_addr_legal) {
 903                                                 struct sockaddr_in6 *sin6,
 904                                                             *rsin6;
 905
 906                                                 sin6 = &sctp_ifa->address.sin6;
 907                                                 rsin6 = (struct sockaddr_in6 *)to;
 908                                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
 909                                                     &sin6->sin6_addr) != 0) {
 910                                                         continue;
 911                                                 }
 912                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 913                                                         if (local_scope == 0)
 914                                                                 continue;
 915                                                         if (sin6->sin6_scope_id == 0) {
 916                                                                 if (sa6_recoverscope(sin6) != 0)
 917                                                                         continue;
 918                                                         }
 919                                                 }
 920                                                 if ((site_scope == 0) &&
 921                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
 922                                                         continue;
 923                                                 }
 924                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 925                                                         SCTP_IPI_ADDR_RUNLOCK();
 926                                                         return (1);
 927                                                 }
 928                                         }
 929                                         break;
 930 #endif
 931                                 default:
 932                                         /* TSNH */
 933                                         break;
 934                                 }
 935                         }
 936                 }
 937         } else {
 938                 struct sctp_laddr *laddr;
 939
 940                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
 941                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 942                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 943                                 continue;
 944                         }
 945                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
 946                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
 947                                 /*
 948                                  * We allow pending addresses, where we have
 949                                  * sent an asconf-add to be considered
 950                                  * valid.
 951                                  */
 952                                 continue;
 953                         }
 954                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
 955                                 continue;
 956                         }
 957                         switch (to->sa_family) {
 958 #ifdef INET
 959                         case AF_INET:
 960                                 {
 961                                         struct sockaddr_in *sin, *rsin;
 962
 963                                         sin = &laddr->ifa->address.sin;
 964                                         rsin = (struct sockaddr_in *)to;
 965                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 966                                                 SCTP_IPI_ADDR_RUNLOCK();
 967                                                 return (1);
 968                                         }
 969                                         break;
 970                                 }
 971 #endif
 972 #ifdef INET6
 973                         case AF_INET6:
 974                                 {
 975                                         struct sockaddr_in6 *sin6, *rsin6;
 976
 977                                         sin6 = &laddr->ifa->address.sin6;
 978                                         rsin6 = (struct sockaddr_in6 *)to;
 979                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 980                                                 SCTP_IPI_ADDR_RUNLOCK();
 981                                                 return (1);
 982                                         }
 983                                         break;
 984                                 }
 985
 986 #endif
 987                         default:
 988                                 /* TSNH */
 989                                 break;
 990                         }
 991
 992                 }
 993         }
 994         SCTP_IPI_ADDR_RUNLOCK();
 995         return (0);
 996 }
 997
 998
 999 static struct sctp_tcb *
1000 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1001     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1002 {
1003         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1004         /*
1005          * If we support the TCP model, then we must now dig through to see
1006          * if we can find our endpoint in the list of tcp ep's.
1007          */
1008         uint16_t lport, rport;
1009         struct sctppcbhead *ephead;
1010         struct sctp_inpcb *inp;
1011         struct sctp_laddr *laddr;
1012         struct sctp_tcb *stcb;
1013         struct sctp_nets *net;
1014
1015         if ((to == NULL) || (from == NULL)) {
1016                 return (NULL);
1017         }
1018
1019         switch (to->sa_family) {
1020 #ifdef INET
1021         case AF_INET:
1022                 if (from->sa_family == AF_INET) {
1023                         lport = ((struct sockaddr_in *)to)->sin_port;
1024                         rport = ((struct sockaddr_in *)from)->sin_port;
1025                 } else {
1026                         return (NULL);
1027                 }
1028                 break;
1029 #endif
1030 #ifdef INET6
1031         case AF_INET6:
1032                 if (from->sa_family == AF_INET6) {
1033                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
1034                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
1035                 } else {
1036                         return (NULL);
1037                 }
1038                 break;
1039 #endif
1040         default:
1041                 return (NULL);
1042         }
1043         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1044         /*
1045          * Ok now for each of the guys in this bucket we must look and see:
1046          * - Does the remote port match. - Does there single association's
1047          * addresses match this address (to). If so we update p_ep to point
1048          * to this ep and return the tcb from it.
1049          */
1050         LIST_FOREACH(inp, ephead, sctp_hash) {
1051                 SCTP_INP_RLOCK(inp);
1052                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1053                         SCTP_INP_RUNLOCK(inp);
1054                         continue;
1055                 }
1056                 if (lport != inp->sctp_lport) {
1057                         SCTP_INP_RUNLOCK(inp);
1058                         continue;
1059                 }
1060                 switch (to->sa_family) {
1061 #ifdef INET
1062                 case AF_INET:
1063                         {
1064                                 struct sockaddr_in *sin;
1065
1066                                 sin = (struct sockaddr_in *)to;
1067                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1068                                     &sin->sin_addr) != 0) {
1069                                         SCTP_INP_RUNLOCK(inp);
1070                                         continue;
1071                                 }
1072                                 break;
1073                         }
1074 #endif
1075 #ifdef INET6
1076                 case AF_INET6:
1077                         {
1078                                 struct sockaddr_in6 *sin6;
1079
1080                                 sin6 = (struct sockaddr_in6 *)to;
1081                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1082                                     &sin6->sin6_addr) != 0) {
1083                                         SCTP_INP_RUNLOCK(inp);
1084                                         continue;
1085                                 }
1086                                 break;
1087                         }
1088 #endif
1089                 default:
1090                         SCTP_INP_RUNLOCK(inp);
1091                         continue;
1092                 }
1093                 if (inp->def_vrf_id != vrf_id) {
1094                         SCTP_INP_RUNLOCK(inp);
1095                         continue;
1096                 }
1097                 /* check to see if the ep has one of the addresses */
1098                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1099                         /* We are NOT bound all, so look further */
1100                         int match = 0;
1101
1102                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1103
1104                                 if (laddr->ifa == NULL) {
1105                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__);
1106                                         continue;
1107                                 }
1108                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1109                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1110                                         continue;
1111                                 }
1112                                 if (laddr->ifa->address.sa.sa_family ==
1113                                     to->sa_family) {
1114                                         /* see if it matches */
1115 #ifdef INET
1116                                         if (from->sa_family == AF_INET) {
1117                                                 struct sockaddr_in *intf_addr,
1118                                                            *sin;
1119
1120                                                 intf_addr = &laddr->ifa->address.sin;
1121                                                 sin = (struct sockaddr_in *)to;
1122                                                 if (sin->sin_addr.s_addr ==
1123                                                     intf_addr->sin_addr.s_addr) {
1124                                                         match = 1;
1125                                                         break;
1126                                                 }
1127                                         }
1128 #endif
1129 #ifdef INET6
1130                                         if (from->sa_family == AF_INET6) {
1131                                                 struct sockaddr_in6 *intf_addr6;
1132                                                 struct sockaddr_in6 *sin6;
1133
1134                                                 sin6 = (struct sockaddr_in6 *)
1135                                                     to;
1136                                                 intf_addr6 = &laddr->ifa->address.sin6;
1137
1138                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1139                                                     intf_addr6)) {
1140                                                         match = 1;
1141                                                         break;
1142                                                 }
1143                                         }
1144 #endif
1145                                 }
1146                         }
1147                         if (match == 0) {
1148                                 /* This endpoint does not have this address */
1149                                 SCTP_INP_RUNLOCK(inp);
1150                                 continue;
1151                         }
1152                 }
1153                 /*
1154                  * Ok if we hit here the ep has the address, does it hold
1155                  * the tcb?
1156                  */
1157                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1158                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1159                 if (stcb == NULL) {
1160                         SCTP_INP_RUNLOCK(inp);
1161                         continue;
1162                 }
1163                 SCTP_TCB_LOCK(stcb);
1164                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1165                         SCTP_TCB_UNLOCK(stcb);
1166                         SCTP_INP_RUNLOCK(inp);
1167                         continue;
1168                 }
1169                 if (stcb->rport != rport) {
1170                         /* remote port does not match. */
1171                         SCTP_TCB_UNLOCK(stcb);
1172                         SCTP_INP_RUNLOCK(inp);
1173                         continue;
1174                 }
1175                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1176                         SCTP_TCB_UNLOCK(stcb);
1177                         SCTP_INP_RUNLOCK(inp);
1178                         continue;
1179                 }
1180                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1181                         SCTP_TCB_UNLOCK(stcb);
1182                         SCTP_INP_RUNLOCK(inp);
1183                         continue;
1184                 }
1185                 /* Does this TCB have a matching address? */
1186                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1187
1188                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1189                                 /* not the same family, can't be a match */
1190                                 continue;
1191                         }
1192                         switch (from->sa_family) {
1193 #ifdef INET
1194                         case AF_INET:
1195                                 {
1196                                         struct sockaddr_in *sin, *rsin;
1197
1198                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
1199                                         rsin = (struct sockaddr_in *)from;
1200                                         if (sin->sin_addr.s_addr ==
1201                                             rsin->sin_addr.s_addr) {
1202                                                 /* found it */
1203                                                 if (netp != NULL) {
1204                                                         *netp = net;
1205                                                 }
1206                                                 /*
1207                                                  * Update the endpoint
1208                                                  * pointer
1209                                                  */
1210                                                 *inp_p = inp;
1211                                                 SCTP_INP_RUNLOCK(inp);
1212                                                 return (stcb);
1213                                         }
1214                                         break;
1215                                 }
1216 #endif
1217 #ifdef INET6
1218                         case AF_INET6:
1219                                 {
1220                                         struct sockaddr_in6 *sin6, *rsin6;
1221
1222                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1223                                         rsin6 = (struct sockaddr_in6 *)from;
1224                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1225                                             rsin6)) {
1226                                                 /* found it */
1227                                                 if (netp != NULL) {
1228                                                         *netp = net;
1229                                                 }
1230                                                 /*
1231                                                  * Update the endpoint
1232                                                  * pointer
1233                                                  */
1234                                                 *inp_p = inp;
1235                                                 SCTP_INP_RUNLOCK(inp);
1236                                                 return (stcb);
1237                                         }
1238                                         break;
1239                                 }
1240 #endif
1241                         default:
1242                                 /* TSNH */
1243                                 break;
1244                         }
1245                 }
1246                 SCTP_TCB_UNLOCK(stcb);
1247                 SCTP_INP_RUNLOCK(inp);
1248         }
1249         return (NULL);
1250 }
1251
1252
1253 /*
1254  * rules for use
1255  *
1256  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1257  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1258  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1259  * NULL.
1260  */
1261
1262 struct sctp_tcb *
1263 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1264     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1265 {
1266         struct sctpasochead *head;
1267         struct sctp_inpcb *inp;
1268         struct sctp_tcb *stcb = NULL;
1269         struct sctp_nets *net;
1270         uint16_t rport;
1271
1272         inp = *inp_p;
1273         switch (remote->sa_family) {
1274 #ifdef INET
1275         case AF_INET:
1276                 rport = (((struct sockaddr_in *)remote)->sin_port);
1277                 break;
1278 #endif
1279 #ifdef INET6
1280         case AF_INET6:
1281                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1282                 break;
1283 #endif
1284         default:
1285                 return (NULL);
1286         }
1287         if (locked_tcb) {
1288                 /*
1289                  * UN-lock so we can do proper locking here this occurs when
1290                  * called from load_addresses_from_init.
1291                  */
1292                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1293                 SCTP_TCB_UNLOCK(locked_tcb);
1294         }
1295         SCTP_INP_INFO_RLOCK();
1296         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1297             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1298                 /*-
1299                  * Now either this guy is our listener or it's the
1300                  * connector. If it is the one that issued the connect, then
1301                  * it's only chance is to be the first TCB in the list. If
1302                  * it is the acceptor, then do the special_lookup to hash
1303                  * and find the real inp.
1304                  */
1305                 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) {
1306                         /* to is peer addr, from is my addr */
1307                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1308                             netp, inp->def_vrf_id);
1309                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1310                                 /* we have a locked tcb, lower refcount */
1311                                 SCTP_INP_DECR_REF(inp);
1312                         }
1313                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1314                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1315                                 SCTP_TCB_LOCK(locked_tcb);
1316                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1317                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1318                         }
1319                         SCTP_INP_INFO_RUNLOCK();
1320                         return (stcb);
1321                 } else {
1322                         SCTP_INP_WLOCK(inp);
1323                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1324                                 goto null_return;
1325                         }
1326                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1327                         if (stcb == NULL) {
1328                                 goto null_return;
1329                         }
1330                         SCTP_TCB_LOCK(stcb);
1331
1332                         if (stcb->rport != rport) {
1333                                 /* remote port does not match. */
1334                                 SCTP_TCB_UNLOCK(stcb);
1335                                 goto null_return;
1336                         }
1337                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1338                                 SCTP_TCB_UNLOCK(stcb);
1339                                 goto null_return;
1340                         }
1341                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1342                                 SCTP_TCB_UNLOCK(stcb);
1343                                 goto null_return;
1344                         }
1345                         /* now look at the list of remote addresses */
1346                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1347 #ifdef INVARIANTS
1348                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1349                                         panic("Corrupt net list");
1350                                 }
1351 #endif
1352                                 if (net->ro._l_addr.sa.sa_family !=
1353                                     remote->sa_family) {
1354                                         /* not the same family */
1355                                         continue;
1356                                 }
1357                                 switch (remote->sa_family) {
1358 #ifdef INET
1359                                 case AF_INET:
1360                                         {
1361                                                 struct sockaddr_in *sin,
1362                                                            *rsin;
1363
1364                                                 sin = (struct sockaddr_in *)
1365                                                     &net->ro._l_addr;
1366                                                 rsin = (struct sockaddr_in *)remote;
1367                                                 if (sin->sin_addr.s_addr ==
1368                                                     rsin->sin_addr.s_addr) {
1369                                                         /* found it */
1370                                                         if (netp != NULL) {
1371                                                                 *netp = net;
1372                                                         }
1373                                                         if (locked_tcb == NULL) {
1374                                                                 SCTP_INP_DECR_REF(inp);
1375                                                         } else if (locked_tcb != stcb) {
1376                                                                 SCTP_TCB_LOCK(locked_tcb);
1377                                                         }
1378                                                         if (locked_tcb) {
1379                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1380                                                         }
1381
1382                                                         SCTP_INP_WUNLOCK(inp);
1383                                                         SCTP_INP_INFO_RUNLOCK();
1384                                                         return (stcb);
1385                                                 }
1386                                                 break;
1387                                         }
1388 #endif
1389 #ifdef INET6
1390                                 case AF_INET6:
1391                                         {
1392                                                 struct sockaddr_in6 *sin6,
1393                                                             *rsin6;
1394
1395                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1396                                                 rsin6 = (struct sockaddr_in6 *)remote;
1397                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1398                                                     rsin6)) {
1399                                                         /* found it */
1400                                                         if (netp != NULL) {
1401                                                                 *netp = net;
1402                                                         }
1403                                                         if (locked_tcb == NULL) {
1404                                                                 SCTP_INP_DECR_REF(inp);
1405                                                         } else if (locked_tcb != stcb) {
1406                                                                 SCTP_TCB_LOCK(locked_tcb);
1407                                                         }
1408                                                         if (locked_tcb) {
1409                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1410                                                         }
1411                                                         SCTP_INP_WUNLOCK(inp);
1412                                                         SCTP_INP_INFO_RUNLOCK();
1413                                                         return (stcb);
1414                                                 }
1415                                                 break;
1416                                         }
1417 #endif
1418                                 default:
1419                                         /* TSNH */
1420                                         break;
1421                                 }
1422                         }
1423                         SCTP_TCB_UNLOCK(stcb);
1424                 }
1425         } else {
1426                 SCTP_INP_WLOCK(inp);
1427                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1428                         goto null_return;
1429                 }
1430                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1431                     inp->sctp_hashmark)];
1432                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1433                         if (stcb->rport != rport) {
1434                                 /* remote port does not match */
1435                                 continue;
1436                         }
1437                         SCTP_TCB_LOCK(stcb);
1438                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1439                                 SCTP_TCB_UNLOCK(stcb);
1440                                 continue;
1441                         }
1442                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1443                                 SCTP_TCB_UNLOCK(stcb);
1444                                 continue;
1445                         }
1446                         /* now look at the list of remote addresses */
1447                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1448 #ifdef INVARIANTS
1449                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1450                                         panic("Corrupt net list");
1451                                 }
1452 #endif
1453                                 if (net->ro._l_addr.sa.sa_family !=
1454                                     remote->sa_family) {
1455                                         /* not the same family */
1456                                         continue;
1457                                 }
1458                                 switch (remote->sa_family) {
1459 #ifdef INET
1460                                 case AF_INET:
1461                                         {
1462                                                 struct sockaddr_in *sin,
1463                                                            *rsin;
1464
1465                                                 sin = (struct sockaddr_in *)
1466                                                     &net->ro._l_addr;
1467                                                 rsin = (struct sockaddr_in *)remote;
1468                                                 if (sin->sin_addr.s_addr ==
1469                                                     rsin->sin_addr.s_addr) {
1470                                                         /* found it */
1471                                                         if (netp != NULL) {
1472                                                                 *netp = net;
1473                                                         }
1474                                                         if (locked_tcb == NULL) {
1475                                                                 SCTP_INP_DECR_REF(inp);
1476                                                         } else if (locked_tcb != stcb) {
1477                                                                 SCTP_TCB_LOCK(locked_tcb);
1478                                                         }
1479                                                         if (locked_tcb) {
1480                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1481                                                         }
1482                                                         SCTP_INP_WUNLOCK(inp);
1483                                                         SCTP_INP_INFO_RUNLOCK();
1484                                                         return (stcb);
1485                                                 }
1486                                                 break;
1487                                         }
1488 #endif
1489 #ifdef INET6
1490                                 case AF_INET6:
1491                                         {
1492                                                 struct sockaddr_in6 *sin6,
1493                                                             *rsin6;
1494
1495                                                 sin6 = (struct sockaddr_in6 *)
1496                                                     &net->ro._l_addr;
1497                                                 rsin6 = (struct sockaddr_in6 *)remote;
1498                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1499                                                     rsin6)) {
1500                                                         /* found it */
1501                                                         if (netp != NULL) {
1502                                                                 *netp = net;
1503                                                         }
1504                                                         if (locked_tcb == NULL) {
1505                                                                 SCTP_INP_DECR_REF(inp);
1506                                                         } else if (locked_tcb != stcb) {
1507                                                                 SCTP_TCB_LOCK(locked_tcb);
1508                                                         }
1509                                                         if (locked_tcb) {
1510                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1511                                                         }
1512                                                         SCTP_INP_WUNLOCK(inp);
1513                                                         SCTP_INP_INFO_RUNLOCK();
1514                                                         return (stcb);
1515                                                 }
1516                                                 break;
1517                                         }
1518 #endif
1519                                 default:
1520                                         /* TSNH */
1521                                         break;
1522                                 }
1523                         }
1524                         SCTP_TCB_UNLOCK(stcb);
1525                 }
1526         }
1527 null_return:
1528         /* clean up for returning null */
1529         if (locked_tcb) {
1530                 SCTP_TCB_LOCK(locked_tcb);
1531                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1532         }
1533         SCTP_INP_WUNLOCK(inp);
1534         SCTP_INP_INFO_RUNLOCK();
1535         /* not found */
1536         return (NULL);
1537 }
1538
1539
1540 /*
1541  * Find an association for a specific endpoint using the association id given
1542  * out in the COMM_UP notification
1543  */
1544 struct sctp_tcb *
1545 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1546 {
1547         /*
1548          * Use my the assoc_id to find a endpoint
1549          */
1550         struct sctpasochead *head;
1551         struct sctp_tcb *stcb;
1552         uint32_t id;
1553
1554         if (inp == NULL) {
1555                 SCTP_PRINTF("TSNH ep_associd\n");
1556                 return (NULL);
1557         }
1558         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1559                 SCTP_PRINTF("TSNH ep_associd0\n");
1560                 return (NULL);
1561         }
1562         id = (uint32_t)asoc_id;
1563         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1564         if (head == NULL) {
1565                 /* invalid id TSNH */
1566                 SCTP_PRINTF("TSNH ep_associd1\n");
1567                 return (NULL);
1568         }
1569         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1570                 if (stcb->asoc.assoc_id == id) {
1571                         if (inp != stcb->sctp_ep) {
1572                                 /*
1573                                  * some other guy has the same id active (id
1574                                  * collision ??).
1575                                  */
1576                                 SCTP_PRINTF("TSNH ep_associd2\n");
1577                                 continue;
1578                         }
1579                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1580                                 continue;
1581                         }
1582                         if (want_lock) {
1583                                 SCTP_TCB_LOCK(stcb);
1584                         }
1585                         return (stcb);
1586                 }
1587         }
1588         return (NULL);
1589 }
1590
1591
1592 struct sctp_tcb *
1593 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1594 {
1595         struct sctp_tcb *stcb;
1596
1597         SCTP_INP_RLOCK(inp);
1598         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1599         SCTP_INP_RUNLOCK(inp);
1600         return (stcb);
1601 }
1602
1603
1604 /*
1605  * Endpoint probe expects that the INP_INFO is locked.
1606  */
1607 static struct sctp_inpcb *
1608 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1609     uint16_t lport, uint32_t vrf_id)
1610 {
1611         struct sctp_inpcb *inp;
1612         struct sctp_laddr *laddr;
1613 #ifdef INET
1614         struct sockaddr_in *sin;
1615 #endif
1616 #ifdef INET6
1617         struct sockaddr_in6 *sin6;
1618         struct sockaddr_in6 *intf_addr6;
1619 #endif
1620         int fnd;
1621
1622 #ifdef INET
1623         sin = NULL;
1624 #endif
1625 #ifdef INET6
1626         sin6 = NULL;
1627 #endif
1628         switch (nam->sa_family) {
1629 #ifdef INET
1630         case AF_INET:
1631                 sin = (struct sockaddr_in *)nam;
1632                 break;
1633 #endif
1634 #ifdef INET6
1635         case AF_INET6:
1636                 sin6 = (struct sockaddr_in6 *)nam;
1637                 break;
1638 #endif
1639         default:
1640                 /* unsupported family */
1641                 return (NULL);
1642         }
1643
1644         if (head == NULL)
1645                 return (NULL);
1646
1647         LIST_FOREACH(inp, head, sctp_hash) {
1648                 SCTP_INP_RLOCK(inp);
1649                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1650                         SCTP_INP_RUNLOCK(inp);
1651                         continue;
1652                 }
1653                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1654                     (inp->sctp_lport == lport)) {
1655                         /* got it */
1656                         switch (nam->sa_family) {
1657 #ifdef INET
1658                         case AF_INET:
1659                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1660                                     SCTP_IPV6_V6ONLY(inp)) {
1661                                         /*
1662                                          * IPv4 on a IPv6 socket with ONLY
1663                                          * IPv6 set
1664                                          */
1665                                         SCTP_INP_RUNLOCK(inp);
1666                                         continue;
1667                                 }
1668                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1669                                     &sin->sin_addr) != 0) {
1670                                         SCTP_INP_RUNLOCK(inp);
1671                                         continue;
1672                                 }
1673                                 break;
1674 #endif
1675 #ifdef INET6
1676                         case AF_INET6:
1677                                 /*
1678                                  * A V6 address and the endpoint is NOT
1679                                  * bound V6
1680                                  */
1681                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1682                                         SCTP_INP_RUNLOCK(inp);
1683                                         continue;
1684                                 }
1685                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1686                                     &sin6->sin6_addr) != 0) {
1687                                         SCTP_INP_RUNLOCK(inp);
1688                                         continue;
1689                                 }
1690                                 break;
1691 #endif
1692                         default:
1693                                 break;
1694                         }
1695                         /* does a VRF id match? */
1696                         fnd = 0;
1697                         if (inp->def_vrf_id == vrf_id)
1698                                 fnd = 1;
1699
1700                         SCTP_INP_RUNLOCK(inp);
1701                         if (!fnd)
1702                                 continue;
1703                         return (inp);
1704                 }
1705                 SCTP_INP_RUNLOCK(inp);
1706         }
1707         switch (nam->sa_family) {
1708 #ifdef INET
1709         case AF_INET:
1710                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1711                         /* Can't hunt for one that has no address specified */
1712                         return (NULL);
1713                 }
1714                 break;
1715 #endif
1716 #ifdef INET6
1717         case AF_INET6:
1718                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1719                         /* Can't hunt for one that has no address specified */
1720                         return (NULL);
1721                 }
1722                 break;
1723 #endif
1724         default:
1725                 break;
1726         }
1727         /*
1728          * ok, not bound to all so see if we can find a EP bound to this
1729          * address.
1730          */
1731         LIST_FOREACH(inp, head, sctp_hash) {
1732                 SCTP_INP_RLOCK(inp);
1733                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1734                         SCTP_INP_RUNLOCK(inp);
1735                         continue;
1736                 }
1737                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1738                         SCTP_INP_RUNLOCK(inp);
1739                         continue;
1740                 }
1741                 /*
1742                  * Ok this could be a likely candidate, look at all of its
1743                  * addresses
1744                  */
1745                 if (inp->sctp_lport != lport) {
1746                         SCTP_INP_RUNLOCK(inp);
1747                         continue;
1748                 }
1749                 /* does a VRF id match? */
1750                 fnd = 0;
1751                 if (inp->def_vrf_id == vrf_id)
1752                         fnd = 1;
1753
1754                 if (!fnd) {
1755                         SCTP_INP_RUNLOCK(inp);
1756                         continue;
1757                 }
1758                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1759                         if (laddr->ifa == NULL) {
1760                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1761                                     __func__);
1762                                 continue;
1763                         }
1764                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1765                             (void *)laddr->ifa);
1766                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1767                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1768                                 continue;
1769                         }
1770                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1771                                 /* possible, see if it matches */
1772                                 switch (nam->sa_family) {
1773 #ifdef INET
1774                                 case AF_INET:
1775                                         if (sin->sin_addr.s_addr ==
1776                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1777                                                 SCTP_INP_RUNLOCK(inp);
1778                                                 return (inp);
1779                                         }
1780                                         break;
1781 #endif
1782 #ifdef INET6
1783                                 case AF_INET6:
1784                                         intf_addr6 = &laddr->ifa->address.sin6;
1785                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1786                                             intf_addr6)) {
1787                                                 SCTP_INP_RUNLOCK(inp);
1788                                                 return (inp);
1789                                         }
1790                                         break;
1791 #endif
1792                                 }
1793                         }
1794                 }
1795                 SCTP_INP_RUNLOCK(inp);
1796         }
1797         return (NULL);
1798 }
1799
1800
1801 static struct sctp_inpcb *
1802 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1803 {
1804         struct sctppcbhead *head;
1805         struct sctp_inpcb *t_inp;
1806         int fnd;
1807
1808         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1809             SCTP_BASE_INFO(hashmark))];
1810         LIST_FOREACH(t_inp, head, sctp_hash) {
1811                 if (t_inp->sctp_lport != lport) {
1812                         continue;
1813                 }
1814                 /* is it in the VRF in question */
1815                 fnd = 0;
1816                 if (t_inp->def_vrf_id == vrf_id)
1817                         fnd = 1;
1818                 if (!fnd)
1819                         continue;
1820
1821                 /* This one is in use. */
1822                 /* check the v6/v4 binding issue */
1823                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1824                     SCTP_IPV6_V6ONLY(t_inp)) {
1825                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1826                                 /* collision in V6 space */
1827                                 return (t_inp);
1828                         } else {
1829                                 /* inp is BOUND_V4 no conflict */
1830                                 continue;
1831                         }
1832                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1833                         /* t_inp is bound v4 and v6, conflict always */
1834                         return (t_inp);
1835                 } else {
1836                         /* t_inp is bound only V4 */
1837                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1838                             SCTP_IPV6_V6ONLY(inp)) {
1839                                 /* no conflict */
1840                                 continue;
1841                         }
1842                         /* else fall through to conflict */
1843                 }
1844                 return (t_inp);
1845         }
1846         return (NULL);
1847 }
1848
1849
1850 int
1851 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1852 {
1853         /* For 1-2-1 with port reuse */
1854         struct sctppcbhead *head;
1855         struct sctp_inpcb *tinp, *ninp;
1856
1857         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1858                 /* only works with port reuse on */
1859                 return (-1);
1860         }
1861         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1862                 return (0);
1863         }
1864         SCTP_INP_RUNLOCK(inp);
1865         SCTP_INP_INFO_WLOCK();
1866         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1867             SCTP_BASE_INFO(hashmark))];
1868         /* Kick out all non-listeners to the TCP hash */
1869         LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1870                 if (tinp->sctp_lport != inp->sctp_lport) {
1871                         continue;
1872                 }
1873                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1874                         continue;
1875                 }
1876                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1877                         continue;
1878                 }
1879                 if (SCTP_IS_LISTENING(tinp)) {
1880                         continue;
1881                 }
1882                 SCTP_INP_WLOCK(tinp);
1883                 LIST_REMOVE(tinp, sctp_hash);
1884                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1885                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1886                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1887                 SCTP_INP_WUNLOCK(tinp);
1888         }
1889         SCTP_INP_WLOCK(inp);
1890         /* Pull from where he was */
1891         LIST_REMOVE(inp, sctp_hash);
1892         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1893         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1894         LIST_INSERT_HEAD(head, inp, sctp_hash);
1895         SCTP_INP_WUNLOCK(inp);
1896         SCTP_INP_RLOCK(inp);
1897         SCTP_INP_INFO_WUNLOCK();
1898         return (0);
1899 }
1900
1901
1902 struct sctp_inpcb *
1903 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1904     uint32_t vrf_id)
1905 {
1906         /*
1907          * First we check the hash table to see if someone has this port
1908          * bound with just the port.
1909          */
1910         struct sctp_inpcb *inp;
1911         struct sctppcbhead *head;
1912         int lport;
1913         unsigned int i;
1914 #ifdef INET
1915         struct sockaddr_in *sin;
1916 #endif
1917 #ifdef INET6
1918         struct sockaddr_in6 *sin6;
1919 #endif
1920
1921         switch (nam->sa_family) {
1922 #ifdef INET
1923         case AF_INET:
1924                 sin = (struct sockaddr_in *)nam;
1925                 lport = sin->sin_port;
1926                 break;
1927 #endif
1928 #ifdef INET6
1929         case AF_INET6:
1930                 sin6 = (struct sockaddr_in6 *)nam;
1931                 lport = sin6->sin6_port;
1932                 break;
1933 #endif
1934         default:
1935                 return (NULL);
1936         }
1937         /*
1938          * I could cheat here and just cast to one of the types but we will
1939          * do it right. It also provides the check against an Unsupported
1940          * type too.
1941          */
1942         /* Find the head of the ALLADDR chain */
1943         if (have_lock == 0) {
1944                 SCTP_INP_INFO_RLOCK();
1945         }
1946         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1947             SCTP_BASE_INFO(hashmark))];
1948         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1949
1950         /*
1951          * If the TCP model exists it could be that the main listening
1952          * endpoint is gone but there still exists a connected socket for
1953          * this guy. If so we can return the first one that we find. This
1954          * may NOT be the correct one so the caller should be wary on the
1955          * returned INP. Currently the only caller that sets find_tcp_pool
1956          * is in bindx where we are verifying that a user CAN bind the
1957          * address. He either has bound it already, or someone else has, or
1958          * its open to bind, so this is good enough.
1959          */
1960         if (inp == NULL && find_tcp_pool) {
1961                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1962                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1963                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1964                         if (inp) {
1965                                 break;
1966                         }
1967                 }
1968         }
1969         if (inp) {
1970                 SCTP_INP_INCR_REF(inp);
1971         }
1972         if (have_lock == 0) {
1973                 SCTP_INP_INFO_RUNLOCK();
1974         }
1975         return (inp);
1976 }
1977
1978
1979 /*
1980  * Find an association for an endpoint with the pointer to whom you want to
1981  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1982  * need to change the *to to some other struct like a mbuf...
1983  */
1984 struct sctp_tcb *
1985 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
1986     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1987     uint32_t vrf_id)
1988 {
1989         struct sctp_inpcb *inp = NULL;
1990         struct sctp_tcb *stcb;
1991
1992         SCTP_INP_INFO_RLOCK();
1993         if (find_tcp_pool) {
1994                 if (inp_p != NULL) {
1995                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
1996                             vrf_id);
1997                 } else {
1998                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
1999                             vrf_id);
2000                 }
2001                 if (stcb != NULL) {
2002                         SCTP_INP_INFO_RUNLOCK();
2003                         return (stcb);
2004                 }
2005         }
2006         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2007         if (inp_p != NULL) {
2008                 *inp_p = inp;
2009         }
2010         SCTP_INP_INFO_RUNLOCK();
2011         if (inp == NULL) {
2012                 return (NULL);
2013         }
2014         /*
2015          * ok, we have an endpoint, now lets find the assoc for it (if any)
2016          * we now place the source address or from in the to of the find
2017          * endpoint call. Since in reality this chain is used from the
2018          * inbound packet side.
2019          */
2020         if (inp_p != NULL) {
2021                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2022                     NULL);
2023         } else {
2024                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2025                     NULL);
2026         }
2027         return (stcb);
2028 }
2029
2030
2031 /*
2032  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2033  * find all addresses that the sender has specified in any address list. Each
2034  * address will be used to lookup the TCB and see if one exits.
2035  */
2036 static struct sctp_tcb *
2037 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2038     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2039     struct sockaddr *dst)
2040 {
2041         struct sctp_paramhdr *phdr, param_buf;
2042 #if defined(INET) || defined(INET6)
2043         struct sctp_tcb *stcb;
2044         uint16_t ptype;
2045 #endif
2046         uint16_t plen;
2047 #ifdef INET
2048         struct sockaddr_in sin4;
2049 #endif
2050 #ifdef INET6
2051         struct sockaddr_in6 sin6;
2052 #endif
2053
2054 #ifdef INET
2055         memset(&sin4, 0, sizeof(sin4));
2056         sin4.sin_len = sizeof(sin4);
2057         sin4.sin_family = AF_INET;
2058         sin4.sin_port = sh->src_port;
2059 #endif
2060 #ifdef INET6
2061         memset(&sin6, 0, sizeof(sin6));
2062         sin6.sin6_len = sizeof(sin6);
2063         sin6.sin6_family = AF_INET6;
2064         sin6.sin6_port = sh->src_port;
2065 #endif
2066
2067         offset += sizeof(struct sctp_init_chunk);
2068
2069         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
2070         while (phdr != NULL) {
2071                 /* now we must see if we want the parameter */
2072 #if defined(INET) || defined(INET6)
2073                 ptype = ntohs(phdr->param_type);
2074 #endif
2075                 plen = ntohs(phdr->param_length);
2076                 if (plen == 0) {
2077                         break;
2078                 }
2079 #ifdef INET
2080                 if (ptype == SCTP_IPV4_ADDRESS &&
2081                     plen == sizeof(struct sctp_ipv4addr_param)) {
2082                         /* Get the rest of the address */
2083                         struct sctp_ipv4addr_param ip4_param, *p4;
2084
2085                         phdr = sctp_get_next_param(m, offset,
2086                             (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param));
2087                         if (phdr == NULL) {
2088                                 return (NULL);
2089                         }
2090                         p4 = (struct sctp_ipv4addr_param *)phdr;
2091                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2092                         /* look it up */
2093                         stcb = sctp_findassociation_ep_addr(inp_p,
2094                             (struct sockaddr *)&sin4, netp, dst, NULL);
2095                         if (stcb != NULL) {
2096                                 return (stcb);
2097                         }
2098                 }
2099 #endif
2100 #ifdef INET6
2101                 if (ptype == SCTP_IPV6_ADDRESS &&
2102                     plen == sizeof(struct sctp_ipv6addr_param)) {
2103                         /* Get the rest of the address */
2104                         struct sctp_ipv6addr_param ip6_param, *p6;
2105
2106                         phdr = sctp_get_next_param(m, offset,
2107                             (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param));
2108                         if (phdr == NULL) {
2109                                 return (NULL);
2110                         }
2111                         p6 = (struct sctp_ipv6addr_param *)phdr;
2112                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2113                         /* look it up */
2114                         stcb = sctp_findassociation_ep_addr(inp_p,
2115                             (struct sockaddr *)&sin6, netp, dst, NULL);
2116                         if (stcb != NULL) {
2117                                 return (stcb);
2118                         }
2119                 }
2120 #endif
2121                 offset += SCTP_SIZE32(plen);
2122                 phdr = sctp_get_next_param(m, offset, &param_buf,
2123                     sizeof(param_buf));
2124         }
2125         return (NULL);
2126 }
2127
2128 static struct sctp_tcb *
2129 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2130     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2131     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2132 {
2133         /*
2134          * Use my vtag to hash. If we find it we then verify the source addr
2135          * is in the assoc. If all goes well we save a bit on rec of a
2136          * packet.
2137          */
2138         struct sctpasochead *head;
2139         struct sctp_nets *net;
2140         struct sctp_tcb *stcb;
2141
2142         SCTP_INP_INFO_RLOCK();
2143         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2144             SCTP_BASE_INFO(hashasocmark))];
2145         LIST_FOREACH(stcb, head, sctp_asocs) {
2146                 SCTP_INP_RLOCK(stcb->sctp_ep);
2147                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2148                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2149                         continue;
2150                 }
2151                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2152                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2153                         continue;
2154                 }
2155                 SCTP_TCB_LOCK(stcb);
2156                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2157                 if (stcb->asoc.my_vtag == vtag) {
2158                         /* candidate */
2159                         if (stcb->rport != rport) {
2160                                 SCTP_TCB_UNLOCK(stcb);
2161                                 continue;
2162                         }
2163                         if (stcb->sctp_ep->sctp_lport != lport) {
2164                                 SCTP_TCB_UNLOCK(stcb);
2165                                 continue;
2166                         }
2167                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2168                                 SCTP_TCB_UNLOCK(stcb);
2169                                 continue;
2170                         }
2171                         /* RRS:Need toaddr check here */
2172                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2173                                 /* Endpoint does not own this address */
2174                                 SCTP_TCB_UNLOCK(stcb);
2175                                 continue;
2176                         }
2177                         if (remote_tag) {
2178                                 /*
2179                                  * If we have both vtags that's all we match
2180                                  * on
2181                                  */
2182                                 if (stcb->asoc.peer_vtag == remote_tag) {
2183                                         /*
2184                                          * If both tags match we consider it
2185                                          * conclusive and check NO
2186                                          * source/destination addresses
2187                                          */
2188                                         goto conclusive;
2189                                 }
2190                         }
2191                         if (skip_src_check) {
2192                 conclusive:
2193                                 if (from) {
2194                                         *netp = sctp_findnet(stcb, from);
2195                                 } else {
2196                                         *netp = NULL;   /* unknown */
2197                                 }
2198                                 if (inp_p)
2199                                         *inp_p = stcb->sctp_ep;
2200                                 SCTP_INP_INFO_RUNLOCK();
2201                                 return (stcb);
2202                         }
2203                         net = sctp_findnet(stcb, from);
2204                         if (net) {
2205                                 /* yep its him. */
2206                                 *netp = net;
2207                                 SCTP_STAT_INCR(sctps_vtagexpress);
2208                                 *inp_p = stcb->sctp_ep;
2209                                 SCTP_INP_INFO_RUNLOCK();
2210                                 return (stcb);
2211                         } else {
2212                                 /*
2213                                  * not him, this should only happen in rare
2214                                  * cases so I peg it.
2215                                  */
2216                                 SCTP_STAT_INCR(sctps_vtagbogus);
2217                         }
2218                 }
2219                 SCTP_TCB_UNLOCK(stcb);
2220         }
2221         SCTP_INP_INFO_RUNLOCK();
2222         return (NULL);
2223 }
2224
2225
2226 /*
2227  * Find an association with the pointer to the inbound IP packet. This can be
2228  * a IPv4 or IPv6 packet.
2229  */
2230 struct sctp_tcb *
2231 sctp_findassociation_addr(struct mbuf *m, int offset,
2232     struct sockaddr *src, struct sockaddr *dst,
2233     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2234     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2235 {
2236         struct sctp_tcb *stcb;
2237         struct sctp_inpcb *inp;
2238
2239         if (sh->v_tag) {
2240                 /* we only go down this path if vtag is non-zero */
2241                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2242                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2243                 if (stcb) {
2244                         return (stcb);
2245                 }
2246         }
2247
2248         if (inp_p) {
2249                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2250                     1, vrf_id);
2251                 inp = *inp_p;
2252         } else {
2253                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2254                     1, vrf_id);
2255         }
2256         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2257         if (stcb == NULL && inp) {
2258                 /* Found a EP but not this address */
2259                 if ((ch->chunk_type == SCTP_INITIATION) ||
2260                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2261                         /*-
2262                          * special hook, we do NOT return linp or an
2263                          * association that is linked to an existing
2264                          * association that is under the TCP pool (i.e. no
2265                          * listener exists). The endpoint finding routine
2266                          * will always find a listener before examining the
2267                          * TCP pool.
2268                          */
2269                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2270                                 if (inp_p) {
2271                                         *inp_p = NULL;
2272                                 }
2273                                 return (NULL);
2274                         }
2275                         stcb = sctp_findassociation_special_addr(m,
2276                             offset, sh, &inp, netp, dst);
2277                         if (inp_p != NULL) {
2278                                 *inp_p = inp;
2279                         }
2280                 }
2281         }
2282         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2283         return (stcb);
2284 }
2285
2286 /*
2287  * lookup an association by an ASCONF lookup address.
2288  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2289  */
2290 struct sctp_tcb *
2291 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2292     struct sockaddr *dst, struct sctphdr *sh,
2293     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2294 {
2295         struct sctp_tcb *stcb;
2296         union sctp_sockstore remote_store;
2297         struct sctp_paramhdr param_buf, *phdr;
2298         int ptype;
2299         int zero_address = 0;
2300 #ifdef INET
2301         struct sockaddr_in *sin;
2302 #endif
2303 #ifdef INET6
2304         struct sockaddr_in6 *sin6;
2305 #endif
2306
2307         memset(&remote_store, 0, sizeof(remote_store));
2308         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2309             &param_buf, sizeof(struct sctp_paramhdr));
2310         if (phdr == NULL) {
2311                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2312                     __func__);
2313                 return NULL;
2314         }
2315         ptype = (int)((uint32_t)ntohs(phdr->param_type));
2316         /* get the correlation address */
2317         switch (ptype) {
2318 #ifdef INET6
2319         case SCTP_IPV6_ADDRESS:
2320                 {
2321                         /* ipv6 address param */
2322                         struct sctp_ipv6addr_param *p6, p6_buf;
2323
2324                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2325                                 return NULL;
2326                         }
2327                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2328                             offset + sizeof(struct sctp_asconf_chunk),
2329                             &p6_buf.ph, sizeof(p6_buf));
2330                         if (p6 == NULL) {
2331                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2332                                     __func__);
2333                                 return (NULL);
2334                         }
2335                         sin6 = &remote_store.sin6;
2336                         sin6->sin6_family = AF_INET6;
2337                         sin6->sin6_len = sizeof(*sin6);
2338                         sin6->sin6_port = sh->src_port;
2339                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2340                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2341                                 zero_address = 1;
2342                         break;
2343                 }
2344 #endif
2345 #ifdef INET
2346         case SCTP_IPV4_ADDRESS:
2347                 {
2348                         /* ipv4 address param */
2349                         struct sctp_ipv4addr_param *p4, p4_buf;
2350
2351                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2352                                 return NULL;
2353                         }
2354                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2355                             offset + sizeof(struct sctp_asconf_chunk),
2356                             &p4_buf.ph, sizeof(p4_buf));
2357                         if (p4 == NULL) {
2358                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2359                                     __func__);
2360                                 return (NULL);
2361                         }
2362                         sin = &remote_store.sin;
2363                         sin->sin_family = AF_INET;
2364                         sin->sin_len = sizeof(*sin);
2365                         sin->sin_port = sh->src_port;
2366                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2367                         if (sin->sin_addr.s_addr == INADDR_ANY)
2368                                 zero_address = 1;
2369                         break;
2370                 }
2371 #endif
2372         default:
2373                 /* invalid address param type */
2374                 return NULL;
2375         }
2376
2377         if (zero_address) {
2378                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2379                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2380                 if (stcb != NULL) {
2381                         SCTP_INP_DECR_REF(*inp_p);
2382                 }
2383         } else {
2384                 stcb = sctp_findassociation_ep_addr(inp_p,
2385                     &remote_store.sa, netp,
2386                     dst, NULL);
2387         }
2388         return (stcb);
2389 }
2390
2391
2392 /*
2393  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2394  * addresses. This way if we don't get a bind we by default pick a ephemeral
2395  * port with all addresses bound.
2396  */
2397 int
2398 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2399 {
2400         /*
2401          * we get called when a new endpoint starts up. We need to allocate
2402          * the sctp_inpcb structure from the zone and init it. Mark it as
2403          * unbound and find a port that we can use as an ephemeral with
2404          * INADDR_ANY. If the user binds later no problem we can then add in
2405          * the specific addresses. And setup the default parameters for the
2406          * EP.
2407          */
2408         int i, error;
2409         struct sctp_inpcb *inp;
2410         struct sctp_pcb *m;
2411         struct timeval time;
2412         sctp_sharedkey_t *null_key;
2413
2414         error = 0;
2415
2416         SCTP_INP_INFO_WLOCK();
2417         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2418         if (inp == NULL) {
2419                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2420                 SCTP_INP_INFO_WUNLOCK();
2421                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2422                 return (ENOBUFS);
2423         }
2424         /* zap it */
2425         memset(inp, 0, sizeof(*inp));
2426
2427         /* bump generations */
2428         /* setup socket pointers */
2429         inp->sctp_socket = so;
2430         inp->ip_inp.inp.inp_socket = so;
2431         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2432 #ifdef INET6
2433         if (INP_SOCKAF(so) == AF_INET6) {
2434                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2435                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2436                 }
2437                 if (MODULE_GLOBAL(ip6_v6only)) {
2438                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2439                 }
2440         }
2441 #endif
2442         inp->sctp_associd_counter = 1;
2443         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2444         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2445         inp->max_cwnd = 0;
2446         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2447         inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable);
2448         inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable);
2449         inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable);
2450         inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable);
2451         inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2452         inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2453         inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2454         inp->idata_supported = 0;
2455
2456         inp->fibnum = so->so_fibnum;
2457         /* init the small hash table we use to track asocid <-> tcb */
2458         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2459         if (inp->sctp_asocidhash == NULL) {
2460                 crfree(inp->ip_inp.inp.inp_cred);
2461                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2462                 SCTP_INP_INFO_WUNLOCK();
2463                 return (ENOBUFS);
2464         }
2465         SCTP_INCR_EP_COUNT();
2466         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2467         SCTP_INP_INFO_WUNLOCK();
2468
2469         so->so_pcb = (caddr_t)inp;
2470
2471         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2472                 /* UDP style socket */
2473                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2474                     SCTP_PCB_FLAGS_UNBOUND);
2475                 /* Be sure it is NON-BLOCKING IO for UDP */
2476                 /* SCTP_SET_SO_NBIO(so); */
2477         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2478                 /* TCP style socket */
2479                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2480                     SCTP_PCB_FLAGS_UNBOUND);
2481                 /* Be sure we have blocking IO by default */
2482                 SOCK_LOCK(so);
2483                 SCTP_CLEAR_SO_NBIO(so);
2484                 SOCK_UNLOCK(so);
2485         } else {
2486                 /*
2487                  * unsupported socket type (RAW, etc)- in case we missed it
2488                  * in protosw
2489                  */
2490                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2491                 so->so_pcb = NULL;
2492                 crfree(inp->ip_inp.inp.inp_cred);
2493                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2494                 return (EOPNOTSUPP);
2495         }
2496         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2497                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2498                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2499         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2500                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2501                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2502         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2503                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2504                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2505         }
2506         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2507             &inp->sctp_hashmark);
2508         if (inp->sctp_tcbhash == NULL) {
2509                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2510                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2511                 so->so_pcb = NULL;
2512                 crfree(inp->ip_inp.inp.inp_cred);
2513                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2514                 return (ENOBUFS);
2515         }
2516         inp->def_vrf_id = vrf_id;
2517
2518         SCTP_INP_INFO_WLOCK();
2519         SCTP_INP_LOCK_INIT(inp);
2520         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2521         SCTP_INP_READ_INIT(inp);
2522         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2523         /* lock the new ep */
2524         SCTP_INP_WLOCK(inp);
2525
2526         /* add it to the info area */
2527         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2528         SCTP_INP_INFO_WUNLOCK();
2529
2530         TAILQ_INIT(&inp->read_queue);
2531         LIST_INIT(&inp->sctp_addr_list);
2532
2533         LIST_INIT(&inp->sctp_asoc_list);
2534
2535 #ifdef SCTP_TRACK_FREED_ASOCS
2536         /* TEMP CODE */
2537         LIST_INIT(&inp->sctp_asoc_free_list);
2538 #endif
2539         /* Init the timer structure for signature change */
2540         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2541         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2542
2543         /* now init the actual endpoint default data */
2544         m = &inp->sctp_ep;
2545
2546         /* setup the base timeout information */
2547         m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC);      /* needed ? */
2548         m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC);      /* needed ? */
2549         m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2550         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2551         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2552         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2553         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2554         /* all max/min max are in ms */
2555         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2556         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2557         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2558         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2559         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2560         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2561         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2562         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2563         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2564         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2565         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2566         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2567         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2568
2569         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2570         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2571         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2572         /* number of streams to pre-open on a association */
2573         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2574
2575         m->default_mtu = 0;
2576         /* Add adaptation cookie */
2577         m->adaptation_layer_indicator = 0;
2578         m->adaptation_layer_indicator_provided = 0;
2579
2580         /* seed random number generator */
2581         m->random_counter = 1;
2582         m->store_at = SCTP_SIGNATURE_SIZE;
2583         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2584         sctp_fill_random_store(m);
2585
2586         /* Minimum cookie size */
2587         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2588             sizeof(struct sctp_state_cookie);
2589         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2590
2591         /* Setup the initial secret */
2592         (void)SCTP_GETTIME_TIMEVAL(&time);
2593         m->time_of_secret_change = time.tv_sec;
2594
2595         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2596                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2597         }
2598         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2599
2600         /* How long is a cookie good for ? */
2601         m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2602         /*
2603          * Initialize authentication parameters
2604          */
2605         m->local_hmacs = sctp_default_supported_hmaclist();
2606         m->local_auth_chunks = sctp_alloc_chunklist();
2607         if (inp->asconf_supported) {
2608                 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2609                 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2610         }
2611         m->default_dscp = 0;
2612 #ifdef INET6
2613         m->default_flowlabel = 0;
2614 #endif
2615         m->port = 0;            /* encapsulation disabled by default */
2616         LIST_INIT(&m->shared_keys);
2617         /* add default NULL key as key id 0 */
2618         null_key = sctp_alloc_sharedkey();
2619         sctp_insert_sharedkey(&m->shared_keys, null_key);
2620         SCTP_INP_WUNLOCK(inp);
2621 #ifdef SCTP_LOG_CLOSING
2622         sctp_log_closing(inp, NULL, 12);
2623 #endif
2624         return (error);
2625 }
2626
2627
2628 void
2629 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2630     struct sctp_tcb *stcb)
2631 {
2632         struct sctp_nets *net;
2633         uint16_t lport, rport;
2634         struct sctppcbhead *head;
2635         struct sctp_laddr *laddr, *oladdr;
2636
2637         atomic_add_int(&stcb->asoc.refcnt, 1);
2638         SCTP_TCB_UNLOCK(stcb);
2639         SCTP_INP_INFO_WLOCK();
2640         SCTP_INP_WLOCK(old_inp);
2641         SCTP_INP_WLOCK(new_inp);
2642         SCTP_TCB_LOCK(stcb);
2643         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2644
2645         new_inp->sctp_ep.time_of_secret_change =
2646             old_inp->sctp_ep.time_of_secret_change;
2647         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2648             sizeof(old_inp->sctp_ep.secret_key));
2649         new_inp->sctp_ep.current_secret_number =
2650             old_inp->sctp_ep.current_secret_number;
2651         new_inp->sctp_ep.last_secret_number =
2652             old_inp->sctp_ep.last_secret_number;
2653         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2654
2655         /* make it so new data pours into the new socket */
2656         stcb->sctp_socket = new_inp->sctp_socket;
2657         stcb->sctp_ep = new_inp;
2658
2659         /* Copy the port across */
2660         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2661         rport = stcb->rport;
2662         /* Pull the tcb from the old association */
2663         LIST_REMOVE(stcb, sctp_tcbhash);
2664         LIST_REMOVE(stcb, sctp_tcblist);
2665         if (stcb->asoc.in_asocid_hash) {
2666                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2667         }
2668         /* Now insert the new_inp into the TCP connected hash */
2669         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2670
2671         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2672         /* Its safe to access */
2673         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2674
2675         /* Now move the tcb into the endpoint list */
2676         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2677         /*
2678          * Question, do we even need to worry about the ep-hash since we
2679          * only have one connection? Probably not :> so lets get rid of it
2680          * and not suck up any kernel memory in that.
2681          */
2682         if (stcb->asoc.in_asocid_hash) {
2683                 struct sctpasochead *lhd;
2684
2685                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2686                     new_inp->hashasocidmark)];
2687                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2688         }
2689         /* Ok. Let's restart timer. */
2690         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2691                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2692                     stcb, net);
2693         }
2694
2695         SCTP_INP_INFO_WUNLOCK();
2696         if (new_inp->sctp_tcbhash != NULL) {
2697                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2698                 new_inp->sctp_tcbhash = NULL;
2699         }
2700         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2701                 /* Subset bound, so copy in the laddr list from the old_inp */
2702                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2703                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2704                         if (laddr == NULL) {
2705                                 /*
2706                                  * Gak, what can we do? This assoc is really
2707                                  * HOSED. We probably should send an abort
2708                                  * here.
2709                                  */
2710                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2711                                 continue;
2712                         }
2713                         SCTP_INCR_LADDR_COUNT();
2714                         memset(laddr, 0, sizeof(*laddr));
2715                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2716                         laddr->ifa = oladdr->ifa;
2717                         atomic_add_int(&laddr->ifa->refcount, 1);
2718                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2719                             sctp_nxt_addr);
2720                         new_inp->laddr_count++;
2721                         if (oladdr == stcb->asoc.last_used_address) {
2722                                 stcb->asoc.last_used_address = laddr;
2723                         }
2724                 }
2725         }
2726         /*
2727          * Now any running timers need to be adjusted since we really don't
2728          * care if they are running or not just blast in the new_inp into
2729          * all of them.
2730          */
2731
2732         stcb->asoc.dack_timer.ep = (void *)new_inp;
2733         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2734         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2735         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2736         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2737         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2738         /* now what about the nets? */
2739         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2740                 net->pmtu_timer.ep = (void *)new_inp;
2741                 net->hb_timer.ep = (void *)new_inp;
2742                 net->rxt_timer.ep = (void *)new_inp;
2743         }
2744         SCTP_INP_WUNLOCK(new_inp);
2745         SCTP_INP_WUNLOCK(old_inp);
2746 }
2747
2748 /*
2749  * insert an laddr entry with the given ifa for the desired list
2750  */
2751 static int
2752 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2753 {
2754         struct sctp_laddr *laddr;
2755
2756         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2757         if (laddr == NULL) {
2758                 /* out of memory? */
2759                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2760                 return (EINVAL);
2761         }
2762         SCTP_INCR_LADDR_COUNT();
2763         memset(laddr, 0, sizeof(*laddr));
2764         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2765         laddr->ifa = ifa;
2766         laddr->action = act;
2767         atomic_add_int(&ifa->refcount, 1);
2768         /* insert it */
2769         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2770
2771         return (0);
2772 }
2773
2774 /*
2775  * Remove an laddr entry from the local address list (on an assoc)
2776  */
2777 static void
2778 sctp_remove_laddr(struct sctp_laddr *laddr)
2779 {
2780
2781         /* remove from the list */
2782         LIST_REMOVE(laddr, sctp_nxt_addr);
2783         sctp_free_ifa(laddr->ifa);
2784         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2785         SCTP_DECR_LADDR_COUNT();
2786 }
2787
2788
2789
2790 /* sctp_ifap is used to bypass normal local address validation checks */
2791 int
2792 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2793     struct sctp_ifa *sctp_ifap, struct thread *p)
2794 {
2795         /* bind a ep to a socket address */
2796         struct sctppcbhead *head;
2797         struct sctp_inpcb *inp, *inp_tmp;
2798         struct inpcb *ip_inp;
2799         int port_reuse_active = 0;
2800         int bindall;
2801         uint16_t lport;
2802         int error;
2803         uint32_t vrf_id;
2804
2805         lport = 0;
2806         bindall = 1;
2807         inp = (struct sctp_inpcb *)so->so_pcb;
2808         ip_inp = (struct inpcb *)so->so_pcb;
2809 #ifdef SCTP_DEBUG
2810         if (addr) {
2811                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2812                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2813                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2814                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2815         }
2816 #endif
2817         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2818                 /* already did a bind, subsequent binds NOT allowed ! */
2819                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2820                 return (EINVAL);
2821         }
2822 #ifdef INVARIANTS
2823         if (p == NULL)
2824                 panic("null proc/thread");
2825 #endif
2826         if (addr != NULL) {
2827                 switch (addr->sa_family) {
2828 #ifdef INET
2829                 case AF_INET:
2830                         {
2831                                 struct sockaddr_in *sin;
2832
2833                                 /* IPV6_V6ONLY socket? */
2834                                 if (SCTP_IPV6_V6ONLY(inp)) {
2835                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2836                                         return (EINVAL);
2837                                 }
2838                                 if (addr->sa_len != sizeof(*sin)) {
2839                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2840                                         return (EINVAL);
2841                                 }
2842
2843                                 sin = (struct sockaddr_in *)addr;
2844                                 lport = sin->sin_port;
2845                                 /*
2846                                  * For LOOPBACK the prison_local_ip4() call
2847                                  * will transmute the ip address to the
2848                                  * proper value.
2849                                  */
2850                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2851                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2852                                         return (error);
2853                                 }
2854                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2855                                         bindall = 0;
2856                                 }
2857                                 break;
2858                         }
2859 #endif
2860 #ifdef INET6
2861                 case AF_INET6:
2862                         {
2863                                 /*
2864                                  * Only for pure IPv6 Address. (No IPv4
2865                                  * Mapped!)
2866                                  */
2867                                 struct sockaddr_in6 *sin6;
2868
2869                                 sin6 = (struct sockaddr_in6 *)addr;
2870
2871                                 if (addr->sa_len != sizeof(*sin6)) {
2872                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2873                                         return (EINVAL);
2874                                 }
2875                                 lport = sin6->sin6_port;
2876                                 /*
2877                                  * For LOOPBACK the prison_local_ip6() call
2878                                  * will transmute the ipv6 address to the
2879                                  * proper value.
2880                                  */
2881                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2882                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2883                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2884                                         return (error);
2885                                 }
2886                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2887                                         bindall = 0;
2888                                         /* KAME hack: embed scopeid */
2889                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2890                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2891                                                 return (EINVAL);
2892                                         }
2893                                 }
2894                                 /* this must be cleared for ifa_ifwithaddr() */
2895                                 sin6->sin6_scope_id = 0;
2896                                 break;
2897                         }
2898 #endif
2899                 default:
2900                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2901                         return (EAFNOSUPPORT);
2902                 }
2903         }
2904         SCTP_INP_INFO_WLOCK();
2905         SCTP_INP_WLOCK(inp);
2906         /* Setup a vrf_id to be the default for the non-bind-all case. */
2907         vrf_id = inp->def_vrf_id;
2908
2909         /* increase our count due to the unlock we do */
2910         SCTP_INP_INCR_REF(inp);
2911         if (lport) {
2912                 /*
2913                  * Did the caller specify a port? if so we must see if an ep
2914                  * already has this one bound.
2915                  */
2916                 /* got to be root to get at low ports */
2917                 if (ntohs(lport) < IPPORT_RESERVED) {
2918                         if ((p != NULL) && ((error =
2919                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2920                             ) != 0)) {
2921                                 SCTP_INP_DECR_REF(inp);
2922                                 SCTP_INP_WUNLOCK(inp);
2923                                 SCTP_INP_INFO_WUNLOCK();
2924                                 return (error);
2925                         }
2926                 }
2927                 SCTP_INP_WUNLOCK(inp);
2928                 if (bindall) {
2929                         vrf_id = inp->def_vrf_id;
2930                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2931                         if (inp_tmp != NULL) {
2932                                 /*
2933                                  * lock guy returned and lower count note
2934                                  * that we are not bound so inp_tmp should
2935                                  * NEVER be inp. And it is this inp
2936                                  * (inp_tmp) that gets the reference bump,
2937                                  * so we must lower it.
2938                                  */
2939                                 SCTP_INP_DECR_REF(inp_tmp);
2940                                 /* unlock info */
2941                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2942                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2943                                         /*
2944                                          * Ok, must be one-2-one and
2945                                          * allowing port re-use
2946                                          */
2947                                         port_reuse_active = 1;
2948                                         goto continue_anyway;
2949                                 }
2950                                 SCTP_INP_DECR_REF(inp);
2951                                 SCTP_INP_INFO_WUNLOCK();
2952                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2953                                 return (EADDRINUSE);
2954                         }
2955                 } else {
2956                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2957                         if (inp_tmp != NULL) {
2958                                 /*
2959                                  * lock guy returned and lower count note
2960                                  * that we are not bound so inp_tmp should
2961                                  * NEVER be inp. And it is this inp
2962                                  * (inp_tmp) that gets the reference bump,
2963                                  * so we must lower it.
2964                                  */
2965                                 SCTP_INP_DECR_REF(inp_tmp);
2966                                 /* unlock info */
2967                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2968                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2969                                         /*
2970                                          * Ok, must be one-2-one and
2971                                          * allowing port re-use
2972                                          */
2973                                         port_reuse_active = 1;
2974                                         goto continue_anyway;
2975                                 }
2976                                 SCTP_INP_DECR_REF(inp);
2977                                 SCTP_INP_INFO_WUNLOCK();
2978                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2979                                 return (EADDRINUSE);
2980                         }
2981                 }
2982 continue_anyway:
2983                 SCTP_INP_WLOCK(inp);
2984                 if (bindall) {
2985                         /* verify that no lport is not used by a singleton */
2986                         if ((port_reuse_active == 0) &&
2987                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
2988                                 /* Sorry someone already has this one bound */
2989                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2990                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2991                                         port_reuse_active = 1;
2992                                 } else {
2993                                         SCTP_INP_DECR_REF(inp);
2994                                         SCTP_INP_WUNLOCK(inp);
2995                                         SCTP_INP_INFO_WUNLOCK();
2996                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2997                                         return (EADDRINUSE);
2998                                 }
2999                         }
3000                 }
3001         } else {
3002                 uint16_t first, last, candidate;
3003                 uint16_t count;
3004                 int done;
3005
3006                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3007                         first = MODULE_GLOBAL(ipport_hifirstauto);
3008                         last = MODULE_GLOBAL(ipport_hilastauto);
3009                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3010                         if (p && (error =
3011                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3012                             )) {
3013                                 SCTP_INP_DECR_REF(inp);
3014                                 SCTP_INP_WUNLOCK(inp);
3015                                 SCTP_INP_INFO_WUNLOCK();
3016                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3017                                 return (error);
3018                         }
3019                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3020                         last = MODULE_GLOBAL(ipport_lowlastauto);
3021                 } else {
3022                         first = MODULE_GLOBAL(ipport_firstauto);
3023                         last = MODULE_GLOBAL(ipport_lastauto);
3024                 }
3025                 if (first > last) {
3026                         uint16_t temp;
3027
3028                         temp = first;
3029                         first = last;
3030                         last = temp;
3031                 }
3032                 count = last - first + 1;       /* number of candidates */
3033                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3034
3035                 done = 0;
3036                 while (!done) {
3037                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3038                                 done = 1;
3039                         }
3040                         if (!done) {
3041                                 if (--count == 0) {
3042                                         SCTP_INP_DECR_REF(inp);
3043                                         SCTP_INP_WUNLOCK(inp);
3044                                         SCTP_INP_INFO_WUNLOCK();
3045                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3046                                         return (EADDRINUSE);
3047                                 }
3048                                 if (candidate == last)
3049                                         candidate = first;
3050                                 else
3051                                         candidate = candidate + 1;
3052                         }
3053                 }
3054                 lport = htons(candidate);
3055         }
3056         SCTP_INP_DECR_REF(inp);
3057         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3058             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3059                 /*
3060                  * this really should not happen. The guy did a non-blocking
3061                  * bind and then did a close at the same time.
3062                  */
3063                 SCTP_INP_WUNLOCK(inp);
3064                 SCTP_INP_INFO_WUNLOCK();
3065                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3066                 return (EINVAL);
3067         }
3068         /* ok we look clear to give out this port, so lets setup the binding */
3069         if (bindall) {
3070                 /* binding to all addresses, so just set in the proper flags */
3071                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3072                 /* set the automatic addr changes from kernel flag */
3073                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3074                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3075                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3076                 } else {
3077                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3078                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3079                 }
3080                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3081                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3082                 } else {
3083                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3084                 }
3085                 /*
3086                  * set the automatic mobility_base from kernel flag (by
3087                  * micchie)
3088                  */
3089                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3090                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3091                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3092                 } else {
3093                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3094                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3095                 }
3096                 /*
3097                  * set the automatic mobility_fasthandoff from kernel flag
3098                  * (by micchie)
3099                  */
3100                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3101                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3102                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3103                 } else {
3104                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3105                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3106                 }
3107         } else {
3108                 /*
3109                  * bind specific, make sure flags is off and add a new
3110                  * address structure to the sctp_addr_list inside the ep
3111                  * structure.
3112                  *
3113                  * We will need to allocate one and insert it at the head.
3114                  * The socketopt call can just insert new addresses in there
3115                  * as well. It will also have to do the embed scope kame
3116                  * hack too (before adding).
3117                  */
3118                 struct sctp_ifa *ifa;
3119                 union sctp_sockstore store;
3120
3121                 memset(&store, 0, sizeof(store));
3122                 switch (addr->sa_family) {
3123 #ifdef INET
3124                 case AF_INET:
3125                         memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3126                         store.sin.sin_port = 0;
3127                         break;
3128 #endif
3129 #ifdef INET6
3130                 case AF_INET6:
3131                         memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3132                         store.sin6.sin6_port = 0;
3133                         break;
3134 #endif
3135                 default:
3136                         break;
3137                 }
3138                 /*
3139                  * first find the interface with the bound address need to
3140                  * zero out the port to find the address! yuck! can't do
3141                  * this earlier since need port for sctp_pcb_findep()
3142                  */
3143                 if (sctp_ifap != NULL) {
3144                         ifa = sctp_ifap;
3145                 } else {
3146                         /*
3147                          * Note for BSD we hit here always other O/S's will
3148                          * pass things in via the sctp_ifap argument.
3149                          */
3150                         ifa = sctp_find_ifa_by_addr(&store.sa,
3151                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3152                 }
3153                 if (ifa == NULL) {
3154                         /* Can't find an interface with that address */
3155                         SCTP_INP_WUNLOCK(inp);
3156                         SCTP_INP_INFO_WUNLOCK();
3157                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3158                         return (EADDRNOTAVAIL);
3159                 }
3160 #ifdef INET6
3161                 if (addr->sa_family == AF_INET6) {
3162                         /* GAK, more FIXME IFA lock? */
3163                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3164                                 /* Can't bind a non-existent addr. */
3165                                 SCTP_INP_WUNLOCK(inp);
3166                                 SCTP_INP_INFO_WUNLOCK();
3167                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3168                                 return (EINVAL);
3169                         }
3170                 }
3171 #endif
3172                 /* we're not bound all */
3173                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3174                 /* allow bindx() to send ASCONF's for binding changes */
3175                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3176                 /* clear automatic addr changes from kernel flag */
3177                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3178
3179                 /* add this address to the endpoint list */
3180                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3181                 if (error != 0) {
3182                         SCTP_INP_WUNLOCK(inp);
3183                         SCTP_INP_INFO_WUNLOCK();
3184                         return (error);
3185                 }
3186                 inp->laddr_count++;
3187         }
3188         /* find the bucket */
3189         if (port_reuse_active) {
3190                 /* Put it into tcp 1-2-1 hash */
3191                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3192                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3193         } else {
3194                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3195         }
3196         /* put it in the bucket */
3197         LIST_INSERT_HEAD(head, inp, sctp_hash);
3198         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3199             (void *)head, ntohs(lport), port_reuse_active);
3200         /* set in the port */
3201         inp->sctp_lport = lport;
3202
3203         /* turn off just the unbound flag */
3204         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3205         SCTP_INP_WUNLOCK(inp);
3206         SCTP_INP_INFO_WUNLOCK();
3207         return (0);
3208 }
3209
3210
3211 static void
3212 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3213 {
3214         struct sctp_iterator *it, *nit;
3215
3216         /*
3217          * We enter with the only the ITERATOR_LOCK in place and a write
3218          * lock on the inp_info stuff.
3219          */
3220         it = sctp_it_ctl.cur_it;
3221         if (it && (it->vn != curvnet)) {
3222                 /* Its not looking at our VNET */
3223                 return;
3224         }
3225         if (it && (it->inp == inp)) {
3226                 /*
3227                  * This is tricky and we hold the iterator lock, but when it
3228                  * returns and gets the lock (when we release it) the
3229                  * iterator will try to operate on inp. We need to stop that
3230                  * from happening. But of course the iterator has a
3231                  * reference on the stcb and inp. We can mark it and it will
3232                  * stop.
3233                  *
3234                  * If its a single iterator situation, we set the end
3235                  * iterator flag. Otherwise we set the iterator to go to the
3236                  * next inp.
3237                  *
3238                  */
3239                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3240                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3241                 } else {
3242                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3243                 }
3244         }
3245         /*
3246          * Now go through and remove any single reference to our inp that
3247          * may be still pending on the list
3248          */
3249         SCTP_IPI_ITERATOR_WQ_LOCK();
3250         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3251                 if (it->vn != curvnet) {
3252                         continue;
3253                 }
3254                 if (it->inp == inp) {
3255                         /* This one points to me is it inp specific? */
3256                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3257                                 /* Remove and free this one */
3258                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3259                                     it, sctp_nxt_itr);
3260                                 if (it->function_atend != NULL) {
3261                                         (*it->function_atend) (it->pointer, it->val);
3262                                 }
3263                                 SCTP_FREE(it, SCTP_M_ITER);
3264                         } else {
3265                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3266                                 if (it->inp) {
3267                                         SCTP_INP_INCR_REF(it->inp);
3268                                 }
3269                         }
3270                         /*
3271                          * When its put in the refcnt is incremented so decr
3272                          * it
3273                          */
3274                         SCTP_INP_DECR_REF(inp);
3275                 }
3276         }
3277         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3278 }
3279
3280 /* release sctp_inpcb unbind the port */
3281 void
3282 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3283 {
3284         /*
3285          * Here we free a endpoint. We must find it (if it is in the Hash
3286          * table) and remove it from there. Then we must also find it in the
3287          * overall list and remove it from there. After all removals are
3288          * complete then any timer has to be stopped. Then start the actual
3289          * freeing. a) Any local lists. b) Any associations. c) The hash of
3290          * all associations. d) finally the ep itself.
3291          */
3292         struct sctp_tcb *asoc, *nasoc;
3293         struct sctp_laddr *laddr, *nladdr;
3294         struct inpcb *ip_pcb;
3295         struct socket *so;
3296         int being_refed = 0;
3297         struct sctp_queued_to_read *sq, *nsq;
3298         int cnt;
3299         sctp_sharedkey_t *shared_key, *nshared_key;
3300
3301
3302 #ifdef SCTP_LOG_CLOSING
3303         sctp_log_closing(inp, NULL, 0);
3304 #endif
3305         SCTP_ITERATOR_LOCK();
3306         /* mark any iterators on the list or being processed */
3307         sctp_iterator_inp_being_freed(inp);
3308         SCTP_ITERATOR_UNLOCK();
3309         so = inp->sctp_socket;
3310         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3311                 /* been here before.. eeks.. get out of here */
3312                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3313 #ifdef SCTP_LOG_CLOSING
3314                 sctp_log_closing(inp, NULL, 1);
3315 #endif
3316                 return;
3317         }
3318         SCTP_ASOC_CREATE_LOCK(inp);
3319         SCTP_INP_INFO_WLOCK();
3320
3321         SCTP_INP_WLOCK(inp);
3322         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3323                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3324                 /* socket is gone, so no more wakeups allowed */
3325                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3326                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3327                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3328
3329         }
3330         /* First time through we have the socket lock, after that no more. */
3331         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3332             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3333
3334         if (inp->control) {
3335                 sctp_m_freem(inp->control);
3336                 inp->control = NULL;
3337         }
3338         if (inp->pkt) {
3339                 sctp_m_freem(inp->pkt);
3340                 inp->pkt = NULL;
3341         }
3342         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3343                                          * here but I will be nice :> (i.e.
3344                                          * ip_pcb = ep;) */
3345         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3346                 int cnt_in_sd;
3347
3348                 cnt_in_sd = 0;
3349                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3350                         SCTP_TCB_LOCK(asoc);
3351                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3352                                 /* Skip guys being freed */
3353                                 cnt_in_sd++;
3354                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3355                                         /*
3356                                          * Special case - we did not start a
3357                                          * kill timer on the asoc due to it
3358                                          * was not closed. So go ahead and
3359                                          * start it now.
3360                                          */
3361                                         SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3362                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3363                                 }
3364                                 SCTP_TCB_UNLOCK(asoc);
3365                                 continue;
3366                         }
3367                         if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
3368                             (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3369                             (asoc->asoc.total_output_queue_size == 0)) {
3370                                 /*
3371                                  * If we have data in queue, we don't want
3372                                  * to just free since the app may have done,
3373                                  * send()/close or connect/send/close. And
3374                                  * it wants the data to get across first.
3375                                  */
3376                                 /* Just abandon things in the front states */
3377                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3378                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3379                                         cnt_in_sd++;
3380                                 }
3381                                 continue;
3382                         }
3383                         /* Disconnect the socket please */
3384                         asoc->sctp_socket = NULL;
3385                         SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET);
3386                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3387                             (asoc->asoc.control_pdapi) ||
3388                             (asoc->asoc.size_on_all_streams > 0) ||
3389                             (so && (so->so_rcv.sb_cc > 0))) {
3390                                 /* Left with Data unread */
3391                                 struct mbuf *op_err;
3392
3393                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3394                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3395                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3396                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3397                                 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3398                                     (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3399                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3400                                 }
3401                                 if (sctp_free_assoc(inp, asoc,
3402                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3403                                         cnt_in_sd++;
3404                                 }
3405                                 continue;
3406                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3407                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3408                             (asoc->asoc.stream_queue_cnt == 0)) {
3409                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3410                                         goto abort_anyway;
3411                                 }
3412                                 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3413                                     (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3414                                         struct sctp_nets *netp;
3415
3416                                         /*
3417                                          * there is nothing queued to send,
3418                                          * so I send shutdown
3419                                          */
3420                                         if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3421                                             (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3422                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3423                                         }
3424                                         SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
3425                                         sctp_stop_timers_for_shutdown(asoc);
3426                                         if (asoc->asoc.alternate) {
3427                                                 netp = asoc->asoc.alternate;
3428                                         } else {
3429                                                 netp = asoc->asoc.primary_destination;
3430                                         }
3431                                         sctp_send_shutdown(asoc, netp);
3432                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3433                                             netp);
3434                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
3435                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3436                                 }
3437                         } else {
3438                                 /* mark into shutdown pending */
3439                                 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
3440                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
3441                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3442                                         SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT);
3443                                 }
3444                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3445                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3446                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3447                                         struct mbuf *op_err;
3448
3449                         abort_anyway:
3450                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3451                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3452                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3453                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3454                                         if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3455                                             (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3456                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3457                                         }
3458                                         if (sctp_free_assoc(inp, asoc,
3459                                             SCTP_PCBFREE_NOFORCE,
3460                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3461                                                 cnt_in_sd++;
3462                                         }
3463                                         continue;
3464                                 } else {
3465                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3466                                 }
3467                         }
3468                         cnt_in_sd++;
3469                         SCTP_TCB_UNLOCK(asoc);
3470                 }
3471                 /* now is there some left in our SHUTDOWN state? */
3472                 if (cnt_in_sd) {
3473 #ifdef SCTP_LOG_CLOSING
3474                         sctp_log_closing(inp, NULL, 2);
3475 #endif
3476                         inp->sctp_socket = NULL;
3477                         SCTP_INP_WUNLOCK(inp);
3478                         SCTP_ASOC_CREATE_UNLOCK(inp);
3479                         SCTP_INP_INFO_WUNLOCK();
3480                         return;
3481                 }
3482         }
3483         inp->sctp_socket = NULL;
3484         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3485             SCTP_PCB_FLAGS_UNBOUND) {
3486                 /*
3487                  * ok, this guy has been bound. It's port is somewhere in
3488                  * the SCTP_BASE_INFO(hash table). Remove it!
3489                  */
3490                 LIST_REMOVE(inp, sctp_hash);
3491                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3492         }
3493
3494         /*
3495          * If there is a timer running to kill us, forget it, since it may
3496          * have a contest on the INP lock.. which would cause us to die ...
3497          */
3498         cnt = 0;
3499         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3500                 SCTP_TCB_LOCK(asoc);
3501                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3502                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3503                                 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3504                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3505                         }
3506                         cnt++;
3507                         SCTP_TCB_UNLOCK(asoc);
3508                         continue;
3509                 }
3510                 /* Free associations that are NOT killing us */
3511                 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
3512                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3513                         struct mbuf *op_err;
3514
3515                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3516                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3517                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3518                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3519                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3520                         cnt++;
3521                         SCTP_TCB_UNLOCK(asoc);
3522                         continue;
3523                 }
3524                 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3525                     (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3526                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3527                 }
3528                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3529                     SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3530                         cnt++;
3531                 }
3532         }
3533         if (cnt) {
3534                 /* Ok we have someone out there that will kill us */
3535 #ifdef SCTP_LOG_CLOSING
3536                 sctp_log_closing(inp, NULL, 3);
3537 #endif
3538                 SCTP_INP_WUNLOCK(inp);
3539                 SCTP_ASOC_CREATE_UNLOCK(inp);
3540                 SCTP_INP_INFO_WUNLOCK();
3541                 return;
3542         }
3543         if (SCTP_INP_LOCK_CONTENDED(inp))
3544                 being_refed++;
3545         if (SCTP_INP_READ_CONTENDED(inp))
3546                 being_refed++;
3547         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3548                 being_refed++;
3549
3550         if ((inp->refcount) ||
3551             (being_refed) ||
3552             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3553 #ifdef SCTP_LOG_CLOSING
3554                 sctp_log_closing(inp, NULL, 4);
3555 #endif
3556                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3557                 SCTP_INP_WUNLOCK(inp);
3558                 SCTP_ASOC_CREATE_UNLOCK(inp);
3559                 SCTP_INP_INFO_WUNLOCK();
3560                 return;
3561         }
3562         inp->sctp_ep.signature_change.type = 0;
3563         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3564         /*
3565          * Remove it from the list .. last thing we need a lock for.
3566          */
3567         LIST_REMOVE(inp, sctp_list);
3568         SCTP_INP_WUNLOCK(inp);
3569         SCTP_ASOC_CREATE_UNLOCK(inp);
3570         SCTP_INP_INFO_WUNLOCK();
3571         /*
3572          * Now we release all locks. Since this INP cannot be found anymore
3573          * except possibly by the kill timer that might be running. We call
3574          * the drain function here. It should hit the case were it sees the
3575          * ACTIVE flag cleared and exit out freeing us to proceed and
3576          * destroy everything.
3577          */
3578         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3579                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3580         } else {
3581                 /* Probably un-needed */
3582                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3583         }
3584
3585 #ifdef SCTP_LOG_CLOSING
3586         sctp_log_closing(inp, NULL, 5);
3587 #endif
3588
3589
3590         if ((inp->sctp_asocidhash) != NULL) {
3591                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3592                 inp->sctp_asocidhash = NULL;
3593         }
3594         /* sa_ignore FREED_MEMORY */
3595         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3596                 /* Its only abandoned if it had data left */
3597                 if (sq->length)
3598                         SCTP_STAT_INCR(sctps_left_abandon);
3599
3600                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3601                 sctp_free_remote_addr(sq->whoFrom);
3602                 if (so)
3603                         so->so_rcv.sb_cc -= sq->length;
3604                 if (sq->data) {
3605                         sctp_m_freem(sq->data);
3606                         sq->data = NULL;
3607                 }
3608                 /*
3609                  * no need to free the net count, since at this point all
3610                  * assoc's are gone.
3611                  */
3612                 sctp_free_a_readq(NULL, sq);
3613         }
3614         /* Now the sctp_pcb things */
3615         /*
3616          * free each asoc if it is not already closed/free. we can't use the
3617          * macro here since le_next will get freed as part of the
3618          * sctp_free_assoc() call.
3619          */
3620         if (ip_pcb->inp_options) {
3621                 (void)sctp_m_free(ip_pcb->inp_options);
3622                 ip_pcb->inp_options = 0;
3623         }
3624
3625
3626 #ifdef INET6
3627         if (ip_pcb->inp_vflag & INP_IPV6) {
3628                 ip6_freepcbopts(ip_pcb->in6p_outputopts);
3629         }
3630 #endif                          /* INET6 */
3631         ip_pcb->inp_vflag = 0;
3632         /* free up authentication fields */
3633         if (inp->sctp_ep.local_auth_chunks != NULL)
3634                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3635         if (inp->sctp_ep.local_hmacs != NULL)
3636                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3637
3638         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3639                 LIST_REMOVE(shared_key, next);
3640                 sctp_free_sharedkey(shared_key);
3641                 /* sa_ignore FREED_MEMORY */
3642         }
3643
3644         /*
3645          * if we have an address list the following will free the list of
3646          * ifaddr's that are set into this ep. Again macro limitations here,
3647          * since the LIST_FOREACH could be a bad idea.
3648          */
3649         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3650                 sctp_remove_laddr(laddr);
3651         }
3652
3653 #ifdef SCTP_TRACK_FREED_ASOCS
3654         /* TEMP CODE */
3655         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3656                 LIST_REMOVE(asoc, sctp_tcblist);
3657                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3658                 SCTP_DECR_ASOC_COUNT();
3659         }
3660         /* *** END TEMP CODE *** */
3661 #endif
3662         /* Now lets see about freeing the EP hash table. */
3663         if (inp->sctp_tcbhash != NULL) {
3664                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3665                 inp->sctp_tcbhash = NULL;
3666         }
3667         /* Now we must put the ep memory back into the zone pool */
3668         crfree(inp->ip_inp.inp.inp_cred);
3669         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3670         SCTP_INP_LOCK_DESTROY(inp);
3671         SCTP_INP_READ_DESTROY(inp);
3672         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3673         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3674         SCTP_DECR_EP_COUNT();
3675 }
3676
3677
3678 struct sctp_nets *
3679 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3680 {
3681         struct sctp_nets *net;
3682
3683         /* locate the address */
3684         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3685                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3686                         return (net);
3687         }
3688         return (NULL);
3689 }
3690
3691
3692 int
3693 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3694 {
3695         struct sctp_ifa *sctp_ifa;
3696
3697         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3698         if (sctp_ifa) {
3699                 return (1);
3700         } else {
3701                 return (0);
3702         }
3703 }
3704
3705 /*
3706  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3707  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3708  * stats of stuff.
3709  */
3710 int
3711 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3712     struct sctp_nets **netp, uint16_t port, int set_scope, int from)
3713 {
3714         /*
3715          * The following is redundant to the same lines in the
3716          * sctp_aloc_assoc() but is needed since others call the add address
3717          * function
3718          */
3719         struct sctp_nets *net, *netfirst;
3720         int addr_inscope;
3721
3722         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3723             from);
3724         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3725
3726         netfirst = sctp_findnet(stcb, newaddr);
3727         if (netfirst) {
3728                 /*
3729                  * Lie and return ok, we don't want to make the association
3730                  * go away for this behavior. It will happen in the TCP
3731                  * model in a connected socket. It does not reach the hash
3732                  * table until after the association is built so it can't be
3733                  * found. Mark as reachable, since the initial creation will
3734                  * have been cleared and the NOT_IN_ASSOC flag will have
3735                  * been added... and we don't want to end up removing it
3736                  * back out.
3737                  */
3738                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3739                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3740                             SCTP_ADDR_UNCONFIRMED);
3741                 } else {
3742                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3743                 }
3744
3745                 return (0);
3746         }
3747         addr_inscope = 1;
3748         switch (newaddr->sa_family) {
3749 #ifdef INET
3750         case AF_INET:
3751                 {
3752                         struct sockaddr_in *sin;
3753
3754                         sin = (struct sockaddr_in *)newaddr;
3755                         if (sin->sin_addr.s_addr == 0) {
3756                                 /* Invalid address */
3757                                 return (-1);
3758                         }
3759                         /* zero out the zero area */
3760                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3761
3762                         /* assure len is set */
3763                         sin->sin_len = sizeof(struct sockaddr_in);
3764                         if (set_scope) {
3765                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3766                                         stcb->asoc.scope.ipv4_local_scope = 1;
3767                                 }
3768                         } else {
3769                                 /* Validate the address is in scope */
3770                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3771                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3772                                         addr_inscope = 0;
3773                                 }
3774                         }
3775                         break;
3776                 }
3777 #endif
3778 #ifdef INET6
3779         case AF_INET6:
3780                 {
3781                         struct sockaddr_in6 *sin6;
3782
3783                         sin6 = (struct sockaddr_in6 *)newaddr;
3784                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3785                                 /* Invalid address */
3786                                 return (-1);
3787                         }
3788                         /* assure len is set */
3789                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3790                         if (set_scope) {
3791                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3792                                         stcb->asoc.scope.loopback_scope = 1;
3793                                         stcb->asoc.scope.local_scope = 0;
3794                                         stcb->asoc.scope.ipv4_local_scope = 1;
3795                                         stcb->asoc.scope.site_scope = 1;
3796                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3797                                         /*
3798                                          * If the new destination is a
3799                                          * LINK_LOCAL we must have common
3800                                          * site scope. Don't set the local
3801                                          * scope since we may not share all
3802                                          * links, only loopback can do this.
3803                                          * Links on the local network would
3804                                          * also be on our private network
3805                                          * for v4 too.
3806                                          */
3807                                         stcb->asoc.scope.ipv4_local_scope = 1;
3808                                         stcb->asoc.scope.site_scope = 1;
3809                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3810                                         /*
3811                                          * If the new destination is
3812                                          * SITE_LOCAL then we must have site
3813                                          * scope in common.
3814                                          */
3815                                         stcb->asoc.scope.site_scope = 1;
3816                                 }
3817                         } else {
3818                                 /* Validate the address is in scope */
3819                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3820                                     (stcb->asoc.scope.loopback_scope == 0)) {
3821                                         addr_inscope = 0;
3822                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3823                                     (stcb->asoc.scope.local_scope == 0)) {
3824                                         addr_inscope = 0;
3825                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3826                                     (stcb->asoc.scope.site_scope == 0)) {
3827                                         addr_inscope = 0;
3828                                 }
3829                         }
3830                         break;
3831                 }
3832 #endif
3833         default:
3834                 /* not supported family type */
3835                 return (-1);
3836         }
3837         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3838         if (net == NULL) {
3839                 return (-1);
3840         }
3841         SCTP_INCR_RADDR_COUNT();
3842         memset(net, 0, sizeof(struct sctp_nets));
3843         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3844         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3845         switch (newaddr->sa_family) {
3846 #ifdef INET
3847         case AF_INET:
3848                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3849                 break;
3850 #endif
3851 #ifdef INET6
3852         case AF_INET6:
3853                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3854                 break;
3855 #endif
3856         default:
3857                 break;
3858         }
3859         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3860         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3861                 stcb->asoc.scope.loopback_scope = 1;
3862                 stcb->asoc.scope.ipv4_local_scope = 1;
3863                 stcb->asoc.scope.local_scope = 0;
3864                 stcb->asoc.scope.site_scope = 1;
3865                 addr_inscope = 1;
3866         }
3867         net->failure_threshold = stcb->asoc.def_net_failure;
3868         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3869         if (addr_inscope == 0) {
3870                 net->dest_state = (SCTP_ADDR_REACHABLE |
3871                     SCTP_ADDR_OUT_OF_SCOPE);
3872         } else {
3873                 if (from == SCTP_ADDR_IS_CONFIRMED)
3874                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3875                         net->dest_state = SCTP_ADDR_REACHABLE;
3876                 else
3877                         net->dest_state = SCTP_ADDR_REACHABLE |
3878                             SCTP_ADDR_UNCONFIRMED;
3879         }
3880         /*
3881          * We set this to 0, the timer code knows that this means its an
3882          * initial value
3883          */
3884         net->rto_needed = 1;
3885         net->RTO = 0;
3886         net->RTO_measured = 0;
3887         stcb->asoc.numnets++;
3888         net->ref_count = 1;
3889         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3890         net->port = port;
3891         net->dscp = stcb->asoc.default_dscp;
3892 #ifdef INET6
3893         net->flowlabel = stcb->asoc.default_flowlabel;
3894 #endif
3895         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3896                 net->dest_state |= SCTP_ADDR_NOHB;
3897         } else {
3898                 net->dest_state &= ~SCTP_ADDR_NOHB;
3899         }
3900         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3901                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3902         } else {
3903                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3904         }
3905         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3906         /* Init the timer structure */
3907         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3908         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3909         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3910
3911         /* Now generate a route for this guy */
3912 #ifdef INET6
3913         /* KAME hack: embed scopeid */
3914         if (newaddr->sa_family == AF_INET6) {
3915                 struct sockaddr_in6 *sin6;
3916
3917                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3918                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3919                 sin6->sin6_scope_id = 0;
3920         }
3921 #endif
3922         SCTP_RTALLOC((sctp_route_t *)&net->ro,
3923             stcb->asoc.vrf_id,
3924             stcb->sctp_ep->fibnum);
3925
3926         net->src_addr_selected = 0;
3927         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3928                 /* Get source address */
3929                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3930                     stcb,
3931                     (sctp_route_t *)&net->ro,
3932                     net,
3933                     0,
3934                     stcb->asoc.vrf_id);
3935                 if (stcb->asoc.default_mtu > 0) {
3936                         net->mtu = stcb->asoc.default_mtu;
3937                         switch (net->ro._l_addr.sa.sa_family) {
3938 #ifdef INET
3939                         case AF_INET:
3940                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
3941                                 break;
3942 #endif
3943 #ifdef INET6
3944                         case AF_INET6:
3945                                 net->mtu += SCTP_MIN_OVERHEAD;
3946                                 break;
3947 #endif
3948                         default:
3949                                 break;
3950                         }
3951 #if defined(INET) || defined(INET6)
3952                         if (net->port) {
3953                                 net->mtu += (uint32_t)sizeof(struct udphdr);
3954                         }
3955 #endif
3956                 } else if (net->ro._s_addr != NULL) {
3957                         uint32_t imtu, rmtu, hcmtu;
3958
3959                         net->src_addr_selected = 1;
3960                         /* Now get the interface MTU */
3961                         if (net->ro._s_addr->ifn_p != NULL) {
3962                                 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3963                         } else {
3964                                 imtu = 0;
3965                         }
3966                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh);
3967                         hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum);
3968                         net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu);
3969                 }
3970         }
3971         if (net->mtu == 0) {
3972                 if (stcb->asoc.default_mtu > 0) {
3973                         net->mtu = stcb->asoc.default_mtu;
3974                         switch (net->ro._l_addr.sa.sa_family) {
3975 #ifdef INET
3976                         case AF_INET:
3977                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
3978                                 break;
3979 #endif
3980 #ifdef INET6
3981                         case AF_INET6:
3982                                 net->mtu += SCTP_MIN_OVERHEAD;
3983                                 break;
3984 #endif
3985                         default:
3986                                 break;
3987                         }
3988 #if defined(INET) || defined(INET6)
3989                         if (net->port) {
3990                                 net->mtu += (uint32_t)sizeof(struct udphdr);
3991                         }
3992 #endif
3993                 } else {
3994                         switch (newaddr->sa_family) {
3995 #ifdef INET
3996                         case AF_INET:
3997                                 net->mtu = SCTP_DEFAULT_MTU;
3998                                 break;
3999 #endif
4000 #ifdef INET6
4001                         case AF_INET6:
4002                                 net->mtu = 1280;
4003                                 break;
4004 #endif
4005                         default:
4006                                 break;
4007                         }
4008                 }
4009         }
4010 #if defined(INET) || defined(INET6)
4011         if (net->port) {
4012                 net->mtu -= (uint32_t)sizeof(struct udphdr);
4013         }
4014 #endif
4015         if (from == SCTP_ALLOC_ASOC) {
4016                 stcb->asoc.smallest_mtu = net->mtu;
4017         }
4018         if (stcb->asoc.smallest_mtu > net->mtu) {
4019                 sctp_pathmtu_adjustment(stcb, net->mtu);
4020         }
4021 #ifdef INET6
4022         if (newaddr->sa_family == AF_INET6) {
4023                 struct sockaddr_in6 *sin6;
4024
4025                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4026                 (void)sa6_recoverscope(sin6);
4027         }
4028 #endif
4029
4030         /* JRS - Use the congestion control given in the CC module */
4031         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4032                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4033
4034         /*
4035          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4036          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4037          */
4038         net->find_pseudo_cumack = 1;
4039         net->find_rtx_pseudo_cumack = 1;
4040         /* Choose an initial flowid. */
4041         net->flowid = stcb->asoc.my_vtag ^
4042             ntohs(stcb->rport) ^
4043             ntohs(stcb->sctp_ep->sctp_lport);
4044         net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4045         if (netp) {
4046                 *netp = net;
4047         }
4048         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4049         if (net->ro.ro_nh == NULL) {
4050                 /* Since we have no route put it at the back */
4051                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4052         } else if (netfirst == NULL) {
4053                 /* We are the first one in the pool. */
4054                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4055         } else if (netfirst->ro.ro_nh == NULL) {
4056                 /*
4057                  * First one has NO route. Place this one ahead of the first
4058                  * one.
4059                  */
4060                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4061         } else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) {
4062                 /*
4063                  * This one has a different interface than the one at the
4064                  * top of the list. Place it ahead.
4065                  */
4066                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4067         } else {
4068                 /*
4069                  * Ok we have the same interface as the first one. Move
4070                  * forward until we find either a) one with a NULL route...
4071                  * insert ahead of that b) one with a different ifp.. insert
4072                  * after that. c) end of the list.. insert at the tail.
4073                  */
4074                 struct sctp_nets *netlook;
4075
4076                 do {
4077                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4078                         if (netlook == NULL) {
4079                                 /* End of the list */
4080                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4081                                 break;
4082                         } else if (netlook->ro.ro_nh == NULL) {
4083                                 /* next one has NO route */
4084                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4085                                 break;
4086                         } else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) {
4087                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4088                                     net, sctp_next);
4089                                 break;
4090                         }
4091                         /* Shift forward */
4092                         netfirst = netlook;
4093                 } while (netlook != NULL);
4094         }
4095
4096         /* got to have a primary set */
4097         if (stcb->asoc.primary_destination == 0) {
4098                 stcb->asoc.primary_destination = net;
4099         } else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) &&
4100                     (net->ro.ro_nh) &&
4101             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4102                 /* No route to current primary adopt new primary */
4103                 stcb->asoc.primary_destination = net;
4104         }
4105         /* Validate primary is first */
4106         net = TAILQ_FIRST(&stcb->asoc.nets);
4107         if ((net != stcb->asoc.primary_destination) &&
4108             (stcb->asoc.primary_destination)) {
4109                 /*
4110                  * first one on the list is NOT the primary sctp_cmpaddr()
4111                  * is much more efficient if the primary is the first on the
4112                  * list, make it so.
4113                  */
4114                 TAILQ_REMOVE(&stcb->asoc.nets,
4115                     stcb->asoc.primary_destination, sctp_next);
4116                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4117                     stcb->asoc.primary_destination, sctp_next);
4118         }
4119         return (0);
4120 }
4121
4122
4123 static uint32_t
4124 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4125 {
4126         uint32_t id;
4127         struct sctpasochead *head;
4128         struct sctp_tcb *lstcb;
4129
4130 try_again:
4131         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4132                 /* TSNH */
4133                 return (0);
4134         }
4135         /*
4136          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4137          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4138          */
4139         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4140                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4141         }
4142         id = inp->sctp_associd_counter;
4143         inp->sctp_associd_counter++;
4144         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4145         if (lstcb) {
4146                 goto try_again;
4147         }
4148         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4149         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4150         stcb->asoc.in_asocid_hash = 1;
4151         return (id);
4152 }
4153
4154 /*
4155  * allocate an association and add it to the endpoint. The caller must be
4156  * careful to add all additional addresses once they are know right away or
4157  * else the assoc will be may experience a blackout scenario.
4158  */
4159 struct sctp_tcb *
4160 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4161     int *error, uint32_t override_tag, uint32_t vrf_id,
4162     uint16_t o_streams, uint16_t port,
4163     struct thread *p,
4164     int initialize_auth_params)
4165 {
4166         /* note the p argument is only valid in unbound sockets */
4167
4168         struct sctp_tcb *stcb;
4169         struct sctp_association *asoc;
4170         struct sctpasochead *head;
4171         uint16_t rport;
4172         int err;
4173
4174         /*
4175          * Assumption made here: Caller has done a
4176          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4177          * address does not exist already.
4178          */
4179         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4180                 /* Hit max assoc, sorry no more */
4181                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4182                 *error = ENOBUFS;
4183                 return (NULL);
4184         }
4185         if (firstaddr == NULL) {
4186                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4187                 *error = EINVAL;
4188                 return (NULL);
4189         }
4190         SCTP_INP_RLOCK(inp);
4191         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4192             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4193             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4194                 /*
4195                  * If its in the TCP pool, its NOT allowed to create an
4196                  * association. The parent listener needs to call
4197                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4198                  * off, or connected one does this.. its an error.
4199                  */
4200                 SCTP_INP_RUNLOCK(inp);
4201                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4202                 *error = EINVAL;
4203                 return (NULL);
4204         }
4205         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4206             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4207                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4208                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4209                         SCTP_INP_RUNLOCK(inp);
4210                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4211                         *error = EINVAL;
4212                         return (NULL);
4213                 }
4214         }
4215         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4216 #ifdef SCTP_DEBUG
4217         if (firstaddr) {
4218                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4219                 switch (firstaddr->sa_family) {
4220 #ifdef INET
4221                 case AF_INET:
4222                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4223                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4224                         break;
4225 #endif
4226 #ifdef INET6
4227                 case AF_INET6:
4228                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4229                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4230                         break;
4231 #endif
4232                 default:
4233                         break;
4234                 }
4235         } else {
4236                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4237         }
4238 #endif                          /* SCTP_DEBUG */
4239         switch (firstaddr->sa_family) {
4240 #ifdef INET
4241         case AF_INET:
4242                 {
4243                         struct sockaddr_in *sin;
4244
4245                         sin = (struct sockaddr_in *)firstaddr;
4246                         if ((ntohs(sin->sin_port) == 0) ||
4247                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4248                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4249                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4250                                 /* Invalid address */
4251                                 SCTP_INP_RUNLOCK(inp);
4252                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4253                                 *error = EINVAL;
4254                                 return (NULL);
4255                         }
4256                         rport = sin->sin_port;
4257                         break;
4258                 }
4259 #endif
4260 #ifdef INET6
4261         case AF_INET6:
4262                 {
4263                         struct sockaddr_in6 *sin6;
4264
4265                         sin6 = (struct sockaddr_in6 *)firstaddr;
4266                         if ((ntohs(sin6->sin6_port) == 0) ||
4267                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4268                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4269                                 /* Invalid address */
4270                                 SCTP_INP_RUNLOCK(inp);
4271                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4272                                 *error = EINVAL;
4273                                 return (NULL);
4274                         }
4275                         rport = sin6->sin6_port;
4276                         break;
4277                 }
4278 #endif
4279         default:
4280                 /* not supported family type */
4281                 SCTP_INP_RUNLOCK(inp);
4282                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4283                 *error = EINVAL;
4284                 return (NULL);
4285         }
4286         SCTP_INP_RUNLOCK(inp);
4287         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4288                 /*
4289                  * If you have not performed a bind, then we need to do the
4290                  * ephemeral bind for you.
4291                  */
4292                 if ((err = sctp_inpcb_bind(inp->sctp_socket, NULL, NULL, p))) {
4293                         /* bind error, probably perm */
4294                         *error = err;
4295                         return (NULL);
4296                 }
4297         }
4298         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4299         if (stcb == NULL) {
4300                 /* out of memory? */
4301                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4302                 *error = ENOMEM;
4303                 return (NULL);
4304         }
4305         SCTP_INCR_ASOC_COUNT();
4306
4307         memset(stcb, 0, sizeof(*stcb));
4308         asoc = &stcb->asoc;
4309
4310         SCTP_TCB_LOCK_INIT(stcb);
4311         SCTP_TCB_SEND_LOCK_INIT(stcb);
4312         stcb->rport = rport;
4313         /* setup back pointer's */
4314         stcb->sctp_ep = inp;
4315         stcb->sctp_socket = inp->sctp_socket;
4316         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
4317                 /* failed */
4318                 SCTP_TCB_LOCK_DESTROY(stcb);
4319                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4320                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4321                 SCTP_DECR_ASOC_COUNT();
4322                 *error = err;
4323                 return (NULL);
4324         }
4325         /* and the port */
4326         SCTP_INP_INFO_WLOCK();
4327         SCTP_INP_WLOCK(inp);
4328         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4329                 /* inpcb freed while alloc going on */
4330                 SCTP_TCB_LOCK_DESTROY(stcb);
4331                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4332                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4333                 SCTP_INP_WUNLOCK(inp);
4334                 SCTP_INP_INFO_WUNLOCK();
4335                 SCTP_DECR_ASOC_COUNT();
4336                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4337                 *error = EINVAL;
4338                 return (NULL);
4339         }
4340         SCTP_TCB_LOCK(stcb);
4341
4342         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4343         /* now that my_vtag is set, add it to the hash */
4344         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4345         /* put it in the bucket in the vtag hash of assoc's for the system */
4346         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4347         SCTP_INP_INFO_WUNLOCK();
4348
4349         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4350                 /* failure.. memory error? */
4351                 if (asoc->strmout) {
4352                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4353                         asoc->strmout = NULL;
4354                 }
4355                 if (asoc->mapping_array) {
4356                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4357                         asoc->mapping_array = NULL;
4358                 }
4359                 if (asoc->nr_mapping_array) {
4360                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4361                         asoc->nr_mapping_array = NULL;
4362                 }
4363                 SCTP_DECR_ASOC_COUNT();
4364                 SCTP_TCB_UNLOCK(stcb);
4365                 SCTP_TCB_LOCK_DESTROY(stcb);
4366                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4367                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4368                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4369                 SCTP_INP_WUNLOCK(inp);
4370                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4371                 *error = ENOBUFS;
4372                 return (NULL);
4373         }
4374         /* Init all the timers */
4375         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4376         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4377         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4378         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4379         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4380         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4381
4382         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4383         /* now file the port under the hash as well */
4384         if (inp->sctp_tcbhash != NULL) {
4385                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4386                     inp->sctp_hashmark)];
4387                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4388         }
4389         if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) {
4390                 sctp_initialize_auth_params(inp, stcb);
4391         }
4392         SCTP_INP_WUNLOCK(inp);
4393         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4394         return (stcb);
4395 }
4396
4397
4398 void
4399 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4400 {
4401         struct sctp_inpcb *inp;
4402         struct sctp_association *asoc;
4403
4404         inp = stcb->sctp_ep;
4405         asoc = &stcb->asoc;
4406         asoc->numnets--;
4407         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4408         if (net == asoc->primary_destination) {
4409                 /* Reset primary */
4410                 struct sctp_nets *lnet;
4411
4412                 lnet = TAILQ_FIRST(&asoc->nets);
4413                 /*
4414                  * Mobility adaptation Ideally, if deleted destination is
4415                  * the primary, it becomes a fast retransmission trigger by
4416                  * the subsequent SET PRIMARY. (by micchie)
4417                  */
4418                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4419                     SCTP_MOBILITY_BASE) ||
4420                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4421                     SCTP_MOBILITY_FASTHANDOFF)) {
4422                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4423                         if (asoc->deleted_primary != NULL) {
4424                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4425                                 goto out;
4426                         }
4427                         asoc->deleted_primary = net;
4428                         atomic_add_int(&net->ref_count, 1);
4429                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4430                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4431                         sctp_mobility_feature_on(stcb->sctp_ep,
4432                             SCTP_MOBILITY_PRIM_DELETED);
4433                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4434                             stcb->sctp_ep, stcb, NULL);
4435                 }
4436 out:
4437                 /* Try to find a confirmed primary */
4438                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4439         }
4440         if (net == asoc->last_data_chunk_from) {
4441                 /* Reset primary */
4442                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4443         }
4444         if (net == asoc->last_control_chunk_from) {
4445                 /* Clear net */
4446                 asoc->last_control_chunk_from = NULL;
4447         }
4448         if (net == stcb->asoc.alternate) {
4449                 sctp_free_remote_addr(stcb->asoc.alternate);
4450                 stcb->asoc.alternate = NULL;
4451         }
4452         sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
4453             SCTP_FROM_SCTP_PCB + SCTP_LOC_9);
4454         sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
4455             SCTP_FROM_SCTP_PCB + SCTP_LOC_10);
4456         net->dest_state |= SCTP_ADDR_BEING_DELETED;
4457         sctp_free_remote_addr(net);
4458 }
4459
4460 /*
4461  * remove a remote endpoint address from an association, it will fail if the
4462  * address does not exist.
4463  */
4464 int
4465 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4466 {
4467         /*
4468          * Here we need to remove a remote address. This is quite simple, we
4469          * first find it in the list of address for the association
4470          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4471          * on that item. Note we do not allow it to be removed if there are
4472          * no other addresses.
4473          */
4474         struct sctp_association *asoc;
4475         struct sctp_nets *net, *nnet;
4476
4477         asoc = &stcb->asoc;
4478
4479         /* locate the address */
4480         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4481                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4482                         continue;
4483                 }
4484                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4485                     remaddr)) {
4486                         /* we found the guy */
4487                         if (asoc->numnets < 2) {
4488                                 /* Must have at LEAST two remote addresses */
4489                                 return (-1);
4490                         } else {
4491                                 sctp_remove_net(stcb, net);
4492                                 return (0);
4493                         }
4494                 }
4495         }
4496         /* not found. */
4497         return (-2);
4498 }
4499
4500 void
4501 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4502 {
4503         struct sctpvtaghead *chain;
4504         struct sctp_tagblock *twait_block;
4505         int found = 0;
4506         int i;
4507
4508         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4509         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4510                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4511                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4512                             (twait_block->vtag_block[i].lport == lport) &&
4513                             (twait_block->vtag_block[i].rport == rport)) {
4514                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4515                                 twait_block->vtag_block[i].v_tag = 0;
4516                                 twait_block->vtag_block[i].lport = 0;
4517                                 twait_block->vtag_block[i].rport = 0;
4518                                 found = 1;
4519                                 break;
4520                         }
4521                 }
4522                 if (found)
4523                         break;
4524         }
4525 }
4526
4527 int
4528 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4529 {
4530         struct sctpvtaghead *chain;
4531         struct sctp_tagblock *twait_block;
4532         int found = 0;
4533         int i;
4534
4535         SCTP_INP_INFO_WLOCK();
4536         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4537         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4538                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4539                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4540                             (twait_block->vtag_block[i].lport == lport) &&
4541                             (twait_block->vtag_block[i].rport == rport)) {
4542                                 found = 1;
4543                                 break;
4544                         }
4545                 }
4546                 if (found)
4547                         break;
4548         }
4549         SCTP_INP_INFO_WUNLOCK();
4550         return (found);
4551 }
4552
4553
4554 void
4555 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4556 {
4557         struct sctpvtaghead *chain;
4558         struct sctp_tagblock *twait_block;
4559         struct timeval now;
4560         int set, i;
4561
4562         if (time == 0) {
4563                 /* Its disabled */
4564                 return;
4565         }
4566         (void)SCTP_GETTIME_TIMEVAL(&now);
4567         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4568         set = 0;
4569         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4570                 /* Block(s) present, lets find space, and expire on the fly */
4571                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4572                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4573                             !set) {
4574                                 twait_block->vtag_block[i].tv_sec_at_expire =
4575                                     now.tv_sec + time;
4576                                 twait_block->vtag_block[i].v_tag = tag;
4577                                 twait_block->vtag_block[i].lport = lport;
4578                                 twait_block->vtag_block[i].rport = rport;
4579                                 set = 1;
4580                         } else if ((twait_block->vtag_block[i].v_tag) &&
4581                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4582                                 /* Audit expires this guy */
4583                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4584                                 twait_block->vtag_block[i].v_tag = 0;
4585                                 twait_block->vtag_block[i].lport = 0;
4586                                 twait_block->vtag_block[i].rport = 0;
4587                                 if (set == 0) {
4588                                         /* Reuse it for my new tag */
4589                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4590                                         twait_block->vtag_block[i].v_tag = tag;
4591                                         twait_block->vtag_block[i].lport = lport;
4592                                         twait_block->vtag_block[i].rport = rport;
4593                                         set = 1;
4594                                 }
4595                         }
4596                 }
4597                 if (set) {
4598                         /*
4599                          * We only do up to the block where we can place our
4600                          * tag for audits
4601                          */
4602                         break;
4603                 }
4604         }
4605         /* Need to add a new block to chain */
4606         if (!set) {
4607                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4608                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4609                 if (twait_block == NULL) {
4610                         return;
4611                 }
4612                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4613                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4614                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4615                 twait_block->vtag_block[0].v_tag = tag;
4616                 twait_block->vtag_block[0].lport = lport;
4617                 twait_block->vtag_block[0].rport = rport;
4618         }
4619 }
4620
4621 void
4622 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4623 {
4624         struct sctp_tmit_chunk *chk, *nchk;
4625         struct sctp_queued_to_read *control, *ncontrol;
4626
4627         TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) {
4628                 TAILQ_REMOVE(rh, control, next_instrm);
4629                 control->on_strm_q = 0;
4630                 if (control->on_read_q == 0) {
4631                         sctp_free_remote_addr(control->whoFrom);
4632                         if (control->data) {
4633                                 sctp_m_freem(control->data);
4634                                 control->data = NULL;
4635                         }
4636                 }
4637                 /* Reassembly free? */
4638                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
4639                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
4640                         if (chk->data) {
4641                                 sctp_m_freem(chk->data);
4642                                 chk->data = NULL;
4643                         }
4644                         if (chk->holds_key_ref)
4645                                 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4646                         sctp_free_remote_addr(chk->whoTo);
4647                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4648                         SCTP_DECR_CHK_COUNT();
4649                         /* sa_ignore FREED_MEMORY */
4650                 }
4651                 /*
4652                  * We don't free the address here since all the net's were
4653                  * freed above.
4654                  */
4655                 if (control->on_read_q == 0) {
4656                         sctp_free_a_readq(stcb, control);
4657                 }
4658         }
4659 }
4660
4661 /*-
4662  * Free the association after un-hashing the remote port. This
4663  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4664  * expect that the input to this function IS a locked TCB.
4665  * It will return 0, if it did NOT destroy the association (instead
4666  * it unlocks it. It will return NON-zero if it either destroyed the
4667  * association OR the association is already destroyed.
4668  */
4669 int
4670 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4671 {
4672         int i;
4673         struct sctp_association *asoc;
4674         struct sctp_nets *net, *nnet;
4675         struct sctp_laddr *laddr, *naddr;
4676         struct sctp_tmit_chunk *chk, *nchk;
4677         struct sctp_asconf_addr *aparam, *naparam;
4678         struct sctp_asconf_ack *aack, *naack;
4679         struct sctp_stream_reset_list *strrst, *nstrrst;
4680         struct sctp_queued_to_read *sq, *nsq;
4681         struct sctp_stream_queue_pending *sp, *nsp;
4682         sctp_sharedkey_t *shared_key, *nshared_key;
4683         struct socket *so;
4684
4685         /* first, lets purge the entry from the hash table. */
4686
4687 #ifdef SCTP_LOG_CLOSING
4688         sctp_log_closing(inp, stcb, 6);
4689 #endif
4690         if (stcb->asoc.state == 0) {
4691 #ifdef SCTP_LOG_CLOSING
4692                 sctp_log_closing(inp, NULL, 7);
4693 #endif
4694                 /* there is no asoc, really TSNH :-0 */
4695                 return (1);
4696         }
4697         if (stcb->asoc.alternate) {
4698                 sctp_free_remote_addr(stcb->asoc.alternate);
4699                 stcb->asoc.alternate = NULL;
4700         }
4701         /* TEMP CODE */
4702         if (stcb->freed_from_where == 0) {
4703                 /* Only record the first place free happened from */
4704                 stcb->freed_from_where = from_location;
4705         }
4706         /* TEMP CODE */
4707
4708         asoc = &stcb->asoc;
4709         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4710             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4711                 /* nothing around */
4712                 so = NULL;
4713         else
4714                 so = inp->sctp_socket;
4715
4716         /*
4717          * We used timer based freeing if a reader or writer is in the way.
4718          * So we first check if we are actually being called from a timer,
4719          * if so we abort early if a reader or writer is still in the way.
4720          */
4721         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4722             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4723                 /*
4724                  * is it the timer driving us? if so are the reader/writers
4725                  * gone?
4726                  */
4727                 if (stcb->asoc.refcnt) {
4728                         /* nope, reader or writer in the way */
4729                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4730                         /* no asoc destroyed */
4731                         SCTP_TCB_UNLOCK(stcb);
4732 #ifdef SCTP_LOG_CLOSING
4733                         sctp_log_closing(inp, stcb, 8);
4734 #endif
4735                         return (0);
4736                 }
4737         }
4738         /* Now clean up any other timers */
4739         sctp_stop_association_timers(stcb, false);
4740         /* Now the read queue needs to be cleaned up (only once) */
4741         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4742                 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED);
4743                 SCTP_INP_READ_LOCK(inp);
4744                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4745                         if (sq->stcb == stcb) {
4746                                 sq->do_not_ref_stcb = 1;
4747                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4748                                 /*
4749                                  * If there is no end, there never will be
4750                                  * now.
4751                                  */
4752                                 if (sq->end_added == 0) {
4753                                         /* Held for PD-API clear that. */
4754                                         sq->pdapi_aborted = 1;
4755                                         sq->held_length = 0;
4756                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4757                                                 /*
4758                                                  * Need to add a PD-API
4759                                                  * aborted indication.
4760                                                  * Setting the control_pdapi
4761                                                  * assures that it will be
4762                                                  * added right after this
4763                                                  * msg.
4764                                                  */
4765                                                 uint32_t strseq;
4766
4767                                                 stcb->asoc.control_pdapi = sq;
4768                                                 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff);
4769                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4770                                                     stcb,
4771                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4772                                                     (void *)&strseq,
4773                                                     SCTP_SO_LOCKED);
4774                                                 stcb->asoc.control_pdapi = NULL;
4775                                         }
4776                                 }
4777                                 /* Add an end to wake them */
4778                                 sq->end_added = 1;
4779                         }
4780                 }
4781                 SCTP_INP_READ_UNLOCK(inp);
4782                 if (stcb->block_entry) {
4783                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4784                         stcb->block_entry->error = ECONNRESET;
4785                         stcb->block_entry = NULL;
4786                 }
4787         }
4788         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4789                 /*
4790                  * Someone holds a reference OR the socket is unaccepted
4791                  * yet.
4792                  */
4793                 if ((stcb->asoc.refcnt) ||
4794                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4795                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4796                         SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4797                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4798                 }
4799                 SCTP_TCB_UNLOCK(stcb);
4800                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4801                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4802                         /* nothing around */
4803                         so = NULL;
4804                 if (so) {
4805                         /* Wake any reader/writers */
4806                         sctp_sorwakeup(inp, so);
4807                         sctp_sowwakeup(inp, so);
4808                 }
4809
4810 #ifdef SCTP_LOG_CLOSING
4811                 sctp_log_closing(inp, stcb, 9);
4812 #endif
4813                 /* no asoc destroyed */
4814                 return (0);
4815         }
4816 #ifdef SCTP_LOG_CLOSING
4817         sctp_log_closing(inp, stcb, 10);
4818 #endif
4819         /*
4820          * When I reach here, no others want to kill the assoc yet.. and I
4821          * own the lock. Now its possible an abort comes in when I do the
4822          * lock exchange below to grab all the locks to do the final take
4823          * out. to prevent this we increment the count, which will start a
4824          * timer and blow out above thus assuring us that we hold exclusive
4825          * killing of the asoc. Note that after getting back the TCB lock we
4826          * will go ahead and increment the counter back up and stop any
4827          * timer a passing stranger may have started :-S
4828          */
4829         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4830                 atomic_add_int(&stcb->asoc.refcnt, 1);
4831
4832                 SCTP_TCB_UNLOCK(stcb);
4833                 SCTP_INP_INFO_WLOCK();
4834                 SCTP_INP_WLOCK(inp);
4835                 SCTP_TCB_LOCK(stcb);
4836         }
4837         /* Double check the GONE flag */
4838         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4839             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4840                 /* nothing around */
4841                 so = NULL;
4842
4843         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4844             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4845                 /*
4846                  * For TCP type we need special handling when we are
4847                  * connected. We also include the peel'ed off ones to.
4848                  */
4849                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4850                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4851                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4852                         if (so) {
4853                                 SOCKBUF_LOCK(&so->so_rcv);
4854                                 so->so_state &= ~(SS_ISCONNECTING |
4855                                     SS_ISDISCONNECTING |
4856                                     SS_ISCONFIRMING |
4857                                     SS_ISCONNECTED);
4858                                 so->so_state |= SS_ISDISCONNECTED;
4859                                 socantrcvmore_locked(so);
4860                                 socantsendmore(so);
4861                                 sctp_sowwakeup(inp, so);
4862                                 sctp_sorwakeup(inp, so);
4863                                 SCTP_SOWAKEUP(so);
4864                         }
4865                 }
4866         }
4867
4868         /*
4869          * Make it invalid too, that way if its about to run it will abort
4870          * and return.
4871          */
4872         /* re-increment the lock */
4873         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4874                 atomic_add_int(&stcb->asoc.refcnt, -1);
4875         }
4876         if (stcb->asoc.refcnt) {
4877                 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4878                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4879                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4880                         SCTP_INP_INFO_WUNLOCK();
4881                         SCTP_INP_WUNLOCK(inp);
4882                 }
4883                 SCTP_TCB_UNLOCK(stcb);
4884                 return (0);
4885         }
4886         asoc->state = 0;
4887         if (inp->sctp_tcbhash) {
4888                 LIST_REMOVE(stcb, sctp_tcbhash);
4889         }
4890         if (stcb->asoc.in_asocid_hash) {
4891                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4892         }
4893         /* Now lets remove it from the list of ALL associations in the EP */
4894         LIST_REMOVE(stcb, sctp_tcblist);
4895         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4896                 SCTP_INP_INCR_REF(inp);
4897                 SCTP_INP_WUNLOCK(inp);
4898         }
4899         /* pull from vtag hash */
4900         LIST_REMOVE(stcb, sctp_asocs);
4901         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4902             inp->sctp_lport, stcb->rport);
4903
4904         /*
4905          * Now restop the timers to be sure this is paranoia at is finest!
4906          */
4907         sctp_stop_association_timers(stcb, true);
4908
4909         /*
4910          * The chunk lists and such SHOULD be empty but we check them just
4911          * in case.
4912          */
4913         /* anything on the wheel needs to be removed */
4914         SCTP_TCB_SEND_LOCK(stcb);
4915         for (i = 0; i < asoc->streamoutcnt; i++) {
4916                 struct sctp_stream_out *outs;
4917
4918                 outs = &asoc->strmout[i];
4919                 /* now clean up any chunks here */
4920                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4921                         atomic_subtract_int(&asoc->stream_queue_cnt, 1);
4922                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4923                         stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1);
4924                         sctp_free_spbufspace(stcb, asoc, sp);
4925                         if (sp->data) {
4926                                 if (so) {
4927                                         /* Still an open socket - report */
4928                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4929                                             0, (void *)sp, SCTP_SO_LOCKED);
4930                                 }
4931                                 if (sp->data) {
4932                                         sctp_m_freem(sp->data);
4933                                         sp->data = NULL;
4934                                         sp->tail_mbuf = NULL;
4935                                         sp->length = 0;
4936                                 }
4937                         }
4938                         if (sp->net) {
4939                                 sctp_free_remote_addr(sp->net);
4940                                 sp->net = NULL;
4941                         }
4942                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4943                 }
4944         }
4945         SCTP_TCB_SEND_UNLOCK(stcb);
4946         /* sa_ignore FREED_MEMORY */
4947         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4948                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4949                 SCTP_FREE(strrst, SCTP_M_STRESET);
4950         }
4951         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4952                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4953                 if (sq->data) {
4954                         sctp_m_freem(sq->data);
4955                         sq->data = NULL;
4956                 }
4957                 sctp_free_remote_addr(sq->whoFrom);
4958                 sq->whoFrom = NULL;
4959                 sq->stcb = NULL;
4960                 /* Free the ctl entry */
4961                 sctp_free_a_readq(stcb, sq);
4962                 /* sa_ignore FREED_MEMORY */
4963         }
4964         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4965                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4966                 if (chk->data) {
4967                         sctp_m_freem(chk->data);
4968                         chk->data = NULL;
4969                 }
4970                 if (chk->holds_key_ref)
4971                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4972                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4973                 SCTP_DECR_CHK_COUNT();
4974                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4975                 asoc->free_chunk_cnt--;
4976                 /* sa_ignore FREED_MEMORY */
4977         }
4978         /* pending send queue SHOULD be empty */
4979         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4980                 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
4981                         asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
4982 #ifdef INVARIANTS
4983                 } else {
4984                         panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
4985 #endif
4986                 }
4987                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4988                 if (chk->data) {
4989                         if (so) {
4990                                 /* Still a socket? */
4991                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
4992                                     0, chk, SCTP_SO_LOCKED);
4993                         }
4994                         if (chk->data) {
4995                                 sctp_m_freem(chk->data);
4996                                 chk->data = NULL;
4997                         }
4998                 }
4999                 if (chk->holds_key_ref)
5000                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5001                 if (chk->whoTo) {
5002                         sctp_free_remote_addr(chk->whoTo);
5003                         chk->whoTo = NULL;
5004                 }
5005                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5006                 SCTP_DECR_CHK_COUNT();
5007                 /* sa_ignore FREED_MEMORY */
5008         }
5009         /* sent queue SHOULD be empty */
5010         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5011                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5012                         if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5013                                 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5014 #ifdef INVARIANTS
5015                         } else {
5016                                 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5017 #endif
5018                         }
5019                 }
5020                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5021                 if (chk->data) {
5022                         if (so) {
5023                                 /* Still a socket? */
5024                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5025                                     0, chk, SCTP_SO_LOCKED);
5026                         }
5027                         if (chk->data) {
5028                                 sctp_m_freem(chk->data);
5029                                 chk->data = NULL;
5030                         }
5031                 }
5032                 if (chk->holds_key_ref)
5033                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5034                 sctp_free_remote_addr(chk->whoTo);
5035                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5036                 SCTP_DECR_CHK_COUNT();
5037                 /* sa_ignore FREED_MEMORY */
5038         }
5039 #ifdef INVARIANTS
5040         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5041                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5042                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5043                 }
5044         }
5045 #endif
5046         /* control queue MAY not be empty */
5047         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5048                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5049                 if (chk->data) {
5050                         sctp_m_freem(chk->data);
5051                         chk->data = NULL;
5052                 }
5053                 if (chk->holds_key_ref)
5054                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5055                 sctp_free_remote_addr(chk->whoTo);
5056                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5057                 SCTP_DECR_CHK_COUNT();
5058                 /* sa_ignore FREED_MEMORY */
5059         }
5060         /* ASCONF queue MAY not be empty */
5061         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5062                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5063                 if (chk->data) {
5064                         sctp_m_freem(chk->data);
5065                         chk->data = NULL;
5066                 }
5067                 if (chk->holds_key_ref)
5068                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5069                 sctp_free_remote_addr(chk->whoTo);
5070                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5071                 SCTP_DECR_CHK_COUNT();
5072                 /* sa_ignore FREED_MEMORY */
5073         }
5074         if (asoc->mapping_array) {
5075                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5076                 asoc->mapping_array = NULL;
5077         }
5078         if (asoc->nr_mapping_array) {
5079                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5080                 asoc->nr_mapping_array = NULL;
5081         }
5082         /* the stream outs */
5083         if (asoc->strmout) {
5084                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5085                 asoc->strmout = NULL;
5086         }
5087         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5088         if (asoc->strmin) {
5089                 for (i = 0; i < asoc->streamincnt; i++) {
5090                         sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5091                         sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5092                 }
5093                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5094                 asoc->strmin = NULL;
5095         }
5096         asoc->streamincnt = 0;
5097         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5098 #ifdef INVARIANTS
5099                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5100                         panic("no net's left alloc'ed, or list points to itself");
5101                 }
5102 #endif
5103                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5104                 sctp_free_remote_addr(net);
5105         }
5106         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5107                 /* sa_ignore FREED_MEMORY */
5108                 sctp_remove_laddr(laddr);
5109         }
5110
5111         /* pending asconf (address) parameters */
5112         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5113                 /* sa_ignore FREED_MEMORY */
5114                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5115                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5116         }
5117         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5118                 /* sa_ignore FREED_MEMORY */
5119                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5120                 if (aack->data != NULL) {
5121                         sctp_m_freem(aack->data);
5122                 }
5123                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5124         }
5125         /* clean up auth stuff */
5126         if (asoc->local_hmacs)
5127                 sctp_free_hmaclist(asoc->local_hmacs);
5128         if (asoc->peer_hmacs)
5129                 sctp_free_hmaclist(asoc->peer_hmacs);
5130
5131         if (asoc->local_auth_chunks)
5132                 sctp_free_chunklist(asoc->local_auth_chunks);
5133         if (asoc->peer_auth_chunks)
5134                 sctp_free_chunklist(asoc->peer_auth_chunks);
5135
5136         sctp_free_authinfo(&asoc->authinfo);
5137
5138         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5139                 LIST_REMOVE(shared_key, next);
5140                 sctp_free_sharedkey(shared_key);
5141                 /* sa_ignore FREED_MEMORY */
5142         }
5143
5144         /* Insert new items here :> */
5145
5146         /* Get rid of LOCK */
5147         SCTP_TCB_UNLOCK(stcb);
5148         SCTP_TCB_LOCK_DESTROY(stcb);
5149         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5150         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5151                 SCTP_INP_INFO_WUNLOCK();
5152                 SCTP_INP_RLOCK(inp);
5153         }
5154 #ifdef SCTP_TRACK_FREED_ASOCS
5155         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5156                 /* now clean up the tasoc itself */
5157                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5158                 SCTP_DECR_ASOC_COUNT();
5159         } else {
5160                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5161         }
5162 #else
5163         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5164         SCTP_DECR_ASOC_COUNT();
5165 #endif
5166         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5167                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5168                         /*
5169                          * If its NOT the inp_free calling us AND sctp_close
5170                          * as been called, we call back...
5171                          */
5172                         SCTP_INP_RUNLOCK(inp);
5173                         /*
5174                          * This will start the kill timer (if we are the
5175                          * last one) since we hold an increment yet. But
5176                          * this is the only safe way to do this since
5177                          * otherwise if the socket closes at the same time
5178                          * we are here we might collide in the cleanup.
5179                          */
5180                         sctp_inpcb_free(inp,
5181                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5182                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5183                         SCTP_INP_DECR_REF(inp);
5184                 } else {
5185                         /* The socket is still open. */
5186                         SCTP_INP_DECR_REF(inp);
5187                         SCTP_INP_RUNLOCK(inp);
5188                 }
5189         }
5190         /* destroyed the asoc */
5191 #ifdef SCTP_LOG_CLOSING
5192         sctp_log_closing(inp, NULL, 11);
5193 #endif
5194         return (1);
5195 }
5196
5197
5198
5199 /*
5200  * determine if a destination is "reachable" based upon the addresses bound
5201  * to the current endpoint (e.g. only v4 or v6 currently bound)
5202  */
5203 /*
5204  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5205  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5206  * types bound as its endpoint
5207  */
5208 int
5209 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5210 {
5211         struct sctp_inpcb *inp;
5212         int answer;
5213
5214         /*
5215          * No locks here, the TCB, in all cases is already locked and an
5216          * assoc is up. There is either a INP lock by the caller applied (in
5217          * asconf case when deleting an address) or NOT in the HB case,
5218          * however if HB then the INP increment is up and the INP will not
5219          * be removed (on top of the fact that we have a TCB lock). So we
5220          * only want to read the sctp_flags, which is either bound-all or
5221          * not.. no protection needed since once an assoc is up you can't be
5222          * changing your binding.
5223          */
5224         inp = stcb->sctp_ep;
5225         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5226                 /* if bound all, destination is not restricted */
5227                 /*
5228                  * RRS: Question during lock work: Is this correct? If you
5229                  * are bound-all you still might need to obey the V4--V6
5230                  * flags??? IMO this bound-all stuff needs to be removed!
5231                  */
5232                 return (1);
5233         }
5234         /* NOTE: all "scope" checks are done when local addresses are added */
5235         switch (destaddr->sa_family) {
5236 #ifdef INET6
5237         case AF_INET6:
5238                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5239                 break;
5240 #endif
5241 #ifdef INET
5242         case AF_INET:
5243                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5244                 break;
5245 #endif
5246         default:
5247                 /* invalid family, so it's unreachable */
5248                 answer = 0;
5249                 break;
5250         }
5251         return (answer);
5252 }
5253
5254 /*
5255  * update the inp_vflags on an endpoint
5256  */
5257 static void
5258 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5259 {
5260         struct sctp_laddr *laddr;
5261
5262         /* first clear the flag */
5263         inp->ip_inp.inp.inp_vflag = 0;
5264         /* set the flag based on addresses on the ep list */
5265         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5266                 if (laddr->ifa == NULL) {
5267                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5268                             __func__);
5269                         continue;
5270                 }
5271
5272                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5273                         continue;
5274                 }
5275                 switch (laddr->ifa->address.sa.sa_family) {
5276 #ifdef INET6
5277                 case AF_INET6:
5278                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5279                         break;
5280 #endif
5281 #ifdef INET
5282                 case AF_INET:
5283                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5284                         break;
5285 #endif
5286                 default:
5287                         break;
5288                 }
5289         }
5290 }
5291
5292 /*
5293  * Add the address to the endpoint local address list There is nothing to be
5294  * done if we are bound to all addresses
5295  */
5296 void
5297 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5298 {
5299         struct sctp_laddr *laddr;
5300         struct sctp_tcb *stcb;
5301         int fnd, error = 0;
5302
5303         fnd = 0;
5304
5305         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5306                 /* You are already bound to all. You have it already */
5307                 return;
5308         }
5309 #ifdef INET6
5310         if (ifa->address.sa.sa_family == AF_INET6) {
5311                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5312                         /* Can't bind a non-useable addr. */
5313                         return;
5314                 }
5315         }
5316 #endif
5317         /* first, is it already present? */
5318         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5319                 if (laddr->ifa == ifa) {
5320                         fnd = 1;
5321                         break;
5322                 }
5323         }
5324
5325         if (fnd == 0) {
5326                 /* Not in the ep list */
5327                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5328                 if (error != 0)
5329                         return;
5330                 inp->laddr_count++;
5331                 /* update inp_vflag flags */
5332                 switch (ifa->address.sa.sa_family) {
5333 #ifdef INET6
5334                 case AF_INET6:
5335                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5336                         break;
5337 #endif
5338 #ifdef INET
5339                 case AF_INET:
5340                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5341                         break;
5342 #endif
5343                 default:
5344                         break;
5345                 }
5346                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5347                         sctp_add_local_addr_restricted(stcb, ifa);
5348                 }
5349         }
5350         return;
5351 }
5352
5353
5354 /*
5355  * select a new (hopefully reachable) destination net (should only be used
5356  * when we deleted an ep addr that is the only usable source address to reach
5357  * the destination net)
5358  */
5359 static void
5360 sctp_select_primary_destination(struct sctp_tcb *stcb)
5361 {
5362         struct sctp_nets *net;
5363
5364         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5365                 /* for now, we'll just pick the first reachable one we find */
5366                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5367                         continue;
5368                 if (sctp_destination_is_reachable(stcb,
5369                     (struct sockaddr *)&net->ro._l_addr)) {
5370                         /* found a reachable destination */
5371                         stcb->asoc.primary_destination = net;
5372                 }
5373         }
5374         /* I can't there from here! ...we're gonna die shortly... */
5375 }
5376
5377
5378 /*
5379  * Delete the address from the endpoint local address list. There is nothing
5380  * to be done if we are bound to all addresses
5381  */
5382 void
5383 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5384 {
5385         struct sctp_laddr *laddr;
5386         int fnd;
5387
5388         fnd = 0;
5389         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5390                 /* You are already bound to all. You have it already */
5391                 return;
5392         }
5393         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5394                 if (laddr->ifa == ifa) {
5395                         fnd = 1;
5396                         break;
5397                 }
5398         }
5399         if (fnd && (inp->laddr_count < 2)) {
5400                 /* can't delete unless there are at LEAST 2 addresses */
5401                 return;
5402         }
5403         if (fnd) {
5404                 /*
5405                  * clean up any use of this address go through our
5406                  * associations and clear any last_used_address that match
5407                  * this one for each assoc, see if a new primary_destination
5408                  * is needed
5409                  */
5410                 struct sctp_tcb *stcb;
5411
5412                 /* clean up "next_addr_touse" */
5413                 if (inp->next_addr_touse == laddr)
5414                         /* delete this address */
5415                         inp->next_addr_touse = NULL;
5416
5417                 /* clean up "last_used_address" */
5418                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5419                         struct sctp_nets *net;
5420
5421                         SCTP_TCB_LOCK(stcb);
5422                         if (stcb->asoc.last_used_address == laddr)
5423                                 /* delete this address */
5424                                 stcb->asoc.last_used_address = NULL;
5425                         /*
5426                          * Now spin through all the nets and purge any ref
5427                          * to laddr
5428                          */
5429                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5430                                 if (net->ro._s_addr == laddr->ifa) {
5431                                         /* Yep, purge src address selected */
5432                                         RO_NHFREE(&net->ro);
5433                                         sctp_free_ifa(net->ro._s_addr);
5434                                         net->ro._s_addr = NULL;
5435                                         net->src_addr_selected = 0;
5436                                 }
5437                         }
5438                         SCTP_TCB_UNLOCK(stcb);
5439                 }               /* for each tcb */
5440                 /* remove it from the ep list */
5441                 sctp_remove_laddr(laddr);
5442                 inp->laddr_count--;
5443                 /* update inp_vflag flags */
5444                 sctp_update_ep_vflag(inp);
5445         }
5446         return;
5447 }
5448
5449 /*
5450  * Add the address to the TCB local address restricted list.
5451  * This is a "pending" address list (eg. addresses waiting for an
5452  * ASCONF-ACK response) and cannot be used as a valid source address.
5453  */
5454 void
5455 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5456 {
5457         struct sctp_laddr *laddr;
5458         struct sctpladdr *list;
5459
5460         /*
5461          * Assumes TCB is locked.. and possibly the INP. May need to
5462          * confirm/fix that if we need it and is not the case.
5463          */
5464         list = &stcb->asoc.sctp_restricted_addrs;
5465
5466 #ifdef INET6
5467         if (ifa->address.sa.sa_family == AF_INET6) {
5468                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5469                         /* Can't bind a non-existent addr. */
5470                         return;
5471                 }
5472         }
5473 #endif
5474         /* does the address already exist? */
5475         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5476                 if (laddr->ifa == ifa) {
5477                         return;
5478                 }
5479         }
5480
5481         /* add to the list */
5482         (void)sctp_insert_laddr(list, ifa, 0);
5483         return;
5484 }
5485
5486 /*
5487  * Remove a local address from the TCB local address restricted list
5488  */
5489 void
5490 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5491 {
5492         struct sctp_inpcb *inp;
5493         struct sctp_laddr *laddr;
5494
5495         /*
5496          * This is called by asconf work. It is assumed that a) The TCB is
5497          * locked and b) The INP is locked. This is true in as much as I can
5498          * trace through the entry asconf code where I did these locks.
5499          * Again, the ASCONF code is a bit different in that it does lock
5500          * the INP during its work often times. This must be since we don't
5501          * want other proc's looking up things while what they are looking
5502          * up is changing :-D
5503          */
5504
5505         inp = stcb->sctp_ep;
5506         /* if subset bound and don't allow ASCONF's, can't delete last */
5507         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5508             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5509                 if (stcb->sctp_ep->laddr_count < 2) {
5510                         /* can't delete last address */
5511                         return;
5512                 }
5513         }
5514         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5515                 /* remove the address if it exists */
5516                 if (laddr->ifa == NULL)
5517                         continue;
5518                 if (laddr->ifa == ifa) {
5519                         sctp_remove_laddr(laddr);
5520                         return;
5521                 }
5522         }
5523
5524         /* address not found! */
5525         return;
5526 }
5527
5528 /* sysctl */
5529 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5530 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5531
5532 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5533 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5534 int *sctp_cpuarry = NULL;
5535
5536 void
5537 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5538 {
5539         /* Queue a packet to a processor for the specified core */
5540         struct sctp_mcore_queue *qent;
5541         struct sctp_mcore_ctrl *wkq;
5542         int need_wake = 0;
5543
5544         if (sctp_mcore_workers == NULL) {
5545                 /* Something went way bad during setup */
5546                 sctp_input_with_port(m, off, 0);
5547                 return;
5548         }
5549         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5550             (sizeof(struct sctp_mcore_queue)),
5551             SCTP_M_MCORE);
5552         if (qent == NULL) {
5553                 /* This is trouble  */
5554                 sctp_input_with_port(m, off, 0);
5555                 return;
5556         }
5557         qent->vn = curvnet;
5558         qent->m = m;
5559         qent->off = off;
5560         qent->v6 = 0;
5561         wkq = &sctp_mcore_workers[cpu_to_use];
5562         SCTP_MCORE_QLOCK(wkq);
5563
5564         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5565         if (wkq->running == 0) {
5566                 need_wake = 1;
5567         }
5568         SCTP_MCORE_QUNLOCK(wkq);
5569         if (need_wake) {
5570                 wakeup(&wkq->running);
5571         }
5572 }
5573
5574 static void
5575 sctp_mcore_thread(void *arg)
5576 {
5577
5578         struct sctp_mcore_ctrl *wkq;
5579         struct sctp_mcore_queue *qent;
5580
5581         wkq = (struct sctp_mcore_ctrl *)arg;
5582         struct mbuf *m;
5583         int off, v6;
5584
5585         /* Wait for first tickle */
5586         SCTP_MCORE_LOCK(wkq);
5587         wkq->running = 0;
5588         msleep(&wkq->running,
5589             &wkq->core_mtx,
5590             0, "wait for pkt", 0);
5591         SCTP_MCORE_UNLOCK(wkq);
5592
5593         /* Bind to our cpu */
5594         thread_lock(curthread);
5595         sched_bind(curthread, wkq->cpuid);
5596         thread_unlock(curthread);
5597
5598         /* Now lets start working */
5599         SCTP_MCORE_LOCK(wkq);
5600         /* Now grab lock and go */
5601         for (;;) {
5602                 SCTP_MCORE_QLOCK(wkq);
5603 skip_sleep:
5604                 wkq->running = 1;
5605                 qent = TAILQ_FIRST(&wkq->que);
5606                 if (qent) {
5607                         TAILQ_REMOVE(&wkq->que, qent, next);
5608                         SCTP_MCORE_QUNLOCK(wkq);
5609                         CURVNET_SET(qent->vn);
5610                         m = qent->m;
5611                         off = qent->off;
5612                         v6 = qent->v6;
5613                         SCTP_FREE(qent, SCTP_M_MCORE);
5614                         if (v6 == 0) {
5615                                 sctp_input_with_port(m, off, 0);
5616                         } else {
5617                                 SCTP_PRINTF("V6 not yet supported\n");
5618                                 sctp_m_freem(m);
5619                         }
5620                         CURVNET_RESTORE();
5621                         SCTP_MCORE_QLOCK(wkq);
5622                 }
5623                 wkq->running = 0;
5624                 if (!TAILQ_EMPTY(&wkq->que)) {
5625                         goto skip_sleep;
5626                 }
5627                 SCTP_MCORE_QUNLOCK(wkq);
5628                 msleep(&wkq->running,
5629                     &wkq->core_mtx,
5630                     0, "wait for pkt", 0);
5631         }
5632 }
5633
5634 static void
5635 sctp_startup_mcore_threads(void)
5636 {
5637         int i, cpu;
5638
5639         if (mp_ncpus == 1)
5640                 return;
5641
5642         if (sctp_mcore_workers != NULL) {
5643                 /*
5644                  * Already been here in some previous vnet?
5645                  */
5646                 return;
5647         }
5648         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5649             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5650             SCTP_M_MCORE);
5651         if (sctp_mcore_workers == NULL) {
5652                 /* TSNH I hope */
5653                 return;
5654         }
5655         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5656             sizeof(struct sctp_mcore_ctrl)));
5657         /* Init the structures */
5658         for (i = 0; i <= mp_maxid; i++) {
5659                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5660                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5661                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5662                 sctp_mcore_workers[i].cpuid = i;
5663         }
5664         if (sctp_cpuarry == NULL) {
5665                 SCTP_MALLOC(sctp_cpuarry, int *,
5666                     (mp_ncpus * sizeof(int)),
5667                     SCTP_M_MCORE);
5668                 i = 0;
5669                 CPU_FOREACH(cpu) {
5670                         sctp_cpuarry[i] = cpu;
5671                         i++;
5672                 }
5673         }
5674         /* Now start them all */
5675         CPU_FOREACH(cpu) {
5676                 (void)kproc_create(sctp_mcore_thread,
5677                     (void *)&sctp_mcore_workers[cpu],
5678                     &sctp_mcore_workers[cpu].thread_proc,
5679                     RFPROC,
5680                     SCTP_KTHREAD_PAGES,
5681                     SCTP_MCORE_NAME);
5682         }
5683 }
5684 #endif
5685
5686 void
5687 sctp_pcb_init(void)
5688 {
5689         /*
5690          * SCTP initialization for the PCB structures should be called by
5691          * the sctp_init() function.
5692          */
5693         int i;
5694         struct timeval tv;
5695
5696         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5697                 /* error I was called twice */
5698                 return;
5699         }
5700         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5701
5702 #if defined(SCTP_LOCAL_TRACE_BUF)
5703         memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log));
5704 #endif
5705 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5706         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5707             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5708             SCTP_M_MCORE);
5709 #endif
5710         (void)SCTP_GETTIME_TIMEVAL(&tv);
5711 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5712         memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1));
5713         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
5714         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
5715 #else
5716         memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat));
5717         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
5718         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
5719 #endif
5720         /* init the empty list of (All) Endpoints */
5721         LIST_INIT(&SCTP_BASE_INFO(listhead));
5722
5723
5724         /* init the hash table of endpoints */
5725         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5726         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5727         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5728         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5729             &SCTP_BASE_INFO(hashasocmark));
5730         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5731             &SCTP_BASE_INFO(hashmark));
5732         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5733             &SCTP_BASE_INFO(hashtcpmark));
5734         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5735
5736
5737         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5738             &SCTP_BASE_INFO(hashvrfmark));
5739
5740         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5741             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5742         /* init the zones */
5743         /*
5744          * FIX ME: Should check for NULL returns, but if it does fail we are
5745          * doomed to panic anyways... add later maybe.
5746          */
5747         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5748             sizeof(struct sctp_inpcb), maxsockets);
5749
5750         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5751             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5752
5753         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5754             sizeof(struct sctp_laddr),
5755             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5756
5757         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5758             sizeof(struct sctp_nets),
5759             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5760
5761         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5762             sizeof(struct sctp_tmit_chunk),
5763             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5764
5765         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5766             sizeof(struct sctp_queued_to_read),
5767             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5768
5769         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5770             sizeof(struct sctp_stream_queue_pending),
5771             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5772
5773         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5774             sizeof(struct sctp_asconf),
5775             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5776
5777         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5778             sizeof(struct sctp_asconf_ack),
5779             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5780
5781
5782         /* Master Lock INIT for info structure */
5783         SCTP_INP_INFO_LOCK_INIT();
5784         SCTP_STATLOG_INIT_LOCK();
5785
5786         SCTP_IPI_COUNT_INIT();
5787         SCTP_IPI_ADDR_INIT();
5788 #ifdef SCTP_PACKET_LOGGING
5789         SCTP_IP_PKTLOG_INIT();
5790 #endif
5791         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5792
5793         SCTP_WQ_ADDR_INIT();
5794         /* not sure if we need all the counts */
5795         SCTP_BASE_INFO(ipi_count_ep) = 0;
5796         /* assoc/tcb zone info */
5797         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5798         /* local addrlist zone info */
5799         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5800         /* remote addrlist zone info */
5801         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5802         /* chunk info */
5803         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5804
5805         /* socket queue zone info */
5806         SCTP_BASE_INFO(ipi_count_readq) = 0;
5807
5808         /* stream out queue cont */
5809         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5810
5811         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5812         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5813
5814         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5815
5816         /* Init the TIMEWAIT list */
5817         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5818                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5819         }
5820         sctp_startup_iterator();
5821
5822 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5823         sctp_startup_mcore_threads();
5824 #endif
5825
5826         /*
5827          * INIT the default VRF which for BSD is the only one, other O/S's
5828          * may have more. But initially they must start with one and then
5829          * add the VRF's as addresses are added.
5830          */
5831         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5832 }
5833
5834 /*
5835  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5836  */
5837 void
5838 sctp_pcb_finish(void)
5839 {
5840         struct sctp_vrflist *vrf_bucket;
5841         struct sctp_vrf *vrf, *nvrf;
5842         struct sctp_ifn *ifn, *nifn;
5843         struct sctp_ifa *ifa, *nifa;
5844         struct sctpvtaghead *chain;
5845         struct sctp_tagblock *twait_block, *prev_twait_block;
5846         struct sctp_laddr *wi, *nwi;
5847         int i;
5848         struct sctp_iterator *it, *nit;
5849
5850         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5851                 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5852                 return;
5853         }
5854         SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5855         /*
5856          * In FreeBSD the iterator thread never exits but we do clean up.
5857          * The only way FreeBSD reaches here is if we have VRF's but we
5858          * still add the ifdef to make it compile on old versions.
5859          */
5860 retry:
5861         SCTP_IPI_ITERATOR_WQ_LOCK();
5862         /*
5863          * sctp_iterator_worker() might be working on an it entry without
5864          * holding the lock.  We won't find it on the list either and
5865          * continue and free/destroy it.  While holding the lock, spin, to
5866          * avoid the race condition as sctp_iterator_worker() will have to
5867          * wait to re-acquire the lock.
5868          */
5869         if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5870                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5871                 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5872                     "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5873                 DELAY(10);
5874                 goto retry;
5875         }
5876         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5877                 if (it->vn != curvnet) {
5878                         continue;
5879                 }
5880                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5881                 if (it->function_atend != NULL) {
5882                         (*it->function_atend) (it->pointer, it->val);
5883                 }
5884                 SCTP_FREE(it, SCTP_M_ITER);
5885         }
5886         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5887         SCTP_ITERATOR_LOCK();
5888         if ((sctp_it_ctl.cur_it) &&
5889             (sctp_it_ctl.cur_it->vn == curvnet)) {
5890                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5891         }
5892         SCTP_ITERATOR_UNLOCK();
5893         SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5894         SCTP_WQ_ADDR_LOCK();
5895         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5896                 LIST_REMOVE(wi, sctp_nxt_addr);
5897                 SCTP_DECR_LADDR_COUNT();
5898                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5899                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
5900                 }
5901                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5902         }
5903         SCTP_WQ_ADDR_UNLOCK();
5904
5905         /*
5906          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5907          * destroyed first).
5908          */
5909         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5910         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5911                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5912                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5913                                 /* free the ifa */
5914                                 LIST_REMOVE(ifa, next_bucket);
5915                                 LIST_REMOVE(ifa, next_ifa);
5916                                 SCTP_FREE(ifa, SCTP_M_IFA);
5917                         }
5918                         /* free the ifn */
5919                         LIST_REMOVE(ifn, next_bucket);
5920                         LIST_REMOVE(ifn, next_ifn);
5921                         SCTP_FREE(ifn, SCTP_M_IFN);
5922                 }
5923                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5924                 /* free the vrf */
5925                 LIST_REMOVE(vrf, next_vrf);
5926                 SCTP_FREE(vrf, SCTP_M_VRF);
5927         }
5928         /* free the vrf hashes */
5929         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5930         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5931
5932         /*
5933          * free the TIMEWAIT list elements malloc'd in the function
5934          * sctp_add_vtag_to_timewait()...
5935          */
5936         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5937                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5938                 if (!LIST_EMPTY(chain)) {
5939                         prev_twait_block = NULL;
5940                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5941                                 if (prev_twait_block) {
5942                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5943                                 }
5944                                 prev_twait_block = twait_block;
5945                         }
5946                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5947                 }
5948         }
5949
5950         /* free the locks and mutexes */
5951 #ifdef SCTP_PACKET_LOGGING
5952         SCTP_IP_PKTLOG_DESTROY();
5953 #endif
5954         SCTP_IPI_ADDR_DESTROY();
5955         SCTP_STATLOG_DESTROY();
5956         SCTP_INP_INFO_LOCK_DESTROY();
5957
5958         SCTP_WQ_ADDR_DESTROY();
5959
5960         /* Get rid of other stuff too. */
5961         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5962                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5963         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5964                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5965         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5966                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5967
5968         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5969         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5970         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5971         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5972         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5973         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5974         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5975         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5976         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5977 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5978         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
5979 #endif
5980 }
5981
5982
5983 int
5984 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5985     int offset, int limit,
5986     struct sockaddr *src, struct sockaddr *dst,
5987     struct sockaddr *altsa, uint16_t port)
5988 {
5989         /*
5990          * grub through the INIT pulling addresses and loading them to the
5991          * nets structure in the asoc. The from address in the mbuf should
5992          * also be loaded (if it is not already). This routine can be called
5993          * with either INIT or INIT-ACK's as long as the m points to the IP
5994          * packet and the offset points to the beginning of the parameters.
5995          */
5996         struct sctp_inpcb *inp;
5997         struct sctp_nets *net, *nnet, *net_tmp;
5998         struct sctp_paramhdr *phdr, param_buf;
5999         struct sctp_tcb *stcb_tmp;
6000         uint16_t ptype, plen;
6001         struct sockaddr *sa;
6002         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6003         struct sctp_auth_random *p_random = NULL;
6004         uint16_t random_len = 0;
6005         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6006         struct sctp_auth_hmac_algo *hmacs = NULL;
6007         uint16_t hmacs_len = 0;
6008         uint8_t saw_asconf = 0;
6009         uint8_t saw_asconf_ack = 0;
6010         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6011         struct sctp_auth_chunk_list *chunks = NULL;
6012         uint16_t num_chunks = 0;
6013         sctp_key_t *new_key;
6014         uint32_t keylen;
6015         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6016         uint8_t peer_supports_ecn;
6017         uint8_t peer_supports_prsctp;
6018         uint8_t peer_supports_auth;
6019         uint8_t peer_supports_asconf;
6020         uint8_t peer_supports_asconf_ack;
6021         uint8_t peer_supports_reconfig;
6022         uint8_t peer_supports_nrsack;
6023         uint8_t peer_supports_pktdrop;
6024         uint8_t peer_supports_idata;
6025 #ifdef INET
6026         struct sockaddr_in sin;
6027 #endif
6028 #ifdef INET6
6029         struct sockaddr_in6 sin6;
6030 #endif
6031
6032         /* First get the destination address setup too. */
6033 #ifdef INET
6034         memset(&sin, 0, sizeof(sin));
6035         sin.sin_family = AF_INET;
6036         sin.sin_len = sizeof(sin);
6037         sin.sin_port = stcb->rport;
6038 #endif
6039 #ifdef INET6
6040         memset(&sin6, 0, sizeof(sin6));
6041         sin6.sin6_family = AF_INET6;
6042         sin6.sin6_len = sizeof(struct sockaddr_in6);
6043         sin6.sin6_port = stcb->rport;
6044 #endif
6045         if (altsa) {
6046                 sa = altsa;
6047         } else {
6048                 sa = src;
6049         }
6050         peer_supports_idata = 0;
6051         peer_supports_ecn = 0;
6052         peer_supports_prsctp = 0;
6053         peer_supports_auth = 0;
6054         peer_supports_asconf = 0;
6055         peer_supports_reconfig = 0;
6056         peer_supports_nrsack = 0;
6057         peer_supports_pktdrop = 0;
6058         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6059                 /* mark all addresses that we have currently on the list */
6060                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6061         }
6062         /* does the source address already exist? if so skip it */
6063         inp = stcb->sctp_ep;
6064         atomic_add_int(&stcb->asoc.refcnt, 1);
6065         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6066         atomic_add_int(&stcb->asoc.refcnt, -1);
6067
6068         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6069                 /* we must add the source address */
6070                 /* no scope set here since we have a tcb already. */
6071                 switch (sa->sa_family) {
6072 #ifdef INET
6073                 case AF_INET:
6074                         if (stcb->asoc.scope.ipv4_addr_legal) {
6075                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6076                                         return (-1);
6077                                 }
6078                         }
6079                         break;
6080 #endif
6081 #ifdef INET6
6082                 case AF_INET6:
6083                         if (stcb->asoc.scope.ipv6_addr_legal) {
6084                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6085                                         return (-2);
6086                                 }
6087                         }
6088                         break;
6089 #endif
6090                 default:
6091                         break;
6092                 }
6093         } else {
6094                 if (net_tmp != NULL && stcb_tmp == stcb) {
6095                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6096                 } else if (stcb_tmp != stcb) {
6097                         /* It belongs to another association? */
6098                         if (stcb_tmp)
6099                                 SCTP_TCB_UNLOCK(stcb_tmp);
6100                         return (-3);
6101                 }
6102         }
6103         if (stcb->asoc.state == 0) {
6104                 /* the assoc was freed? */
6105                 return (-4);
6106         }
6107         /* now we must go through each of the params. */
6108         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
6109         while (phdr) {
6110                 ptype = ntohs(phdr->param_type);
6111                 plen = ntohs(phdr->param_length);
6112                 /*
6113                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6114                  * (uint32_t)ptype, (int)plen);
6115                  */
6116                 if (offset + plen > limit) {
6117                         break;
6118                 }
6119                 if (plen < sizeof(struct sctp_paramhdr)) {
6120                         break;
6121                 }
6122 #ifdef INET
6123                 if (ptype == SCTP_IPV4_ADDRESS) {
6124                         if (stcb->asoc.scope.ipv4_addr_legal) {
6125                                 struct sctp_ipv4addr_param *p4, p4_buf;
6126
6127                                 /* ok get the v4 address and check/add */
6128                                 phdr = sctp_get_next_param(m, offset,
6129                                     (struct sctp_paramhdr *)&p4_buf,
6130                                     sizeof(p4_buf));
6131                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6132                                     phdr == NULL) {
6133                                         return (-5);
6134                                 }
6135                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6136                                 sin.sin_addr.s_addr = p4->addr;
6137                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6138                                         /* Skip multi-cast addresses */
6139                                         goto next_param;
6140                                 }
6141                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6142                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6143                                         goto next_param;
6144                                 }
6145                                 sa = (struct sockaddr *)&sin;
6146                                 inp = stcb->sctp_ep;
6147                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6148                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6149                                     dst, stcb);
6150                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6151
6152                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6153                                     inp == NULL) {
6154                                         /* we must add the source address */
6155                                         /*
6156                                          * no scope set since we have a tcb
6157                                          * already
6158                                          */
6159
6160                                         /*
6161                                          * we must validate the state again
6162                                          * here
6163                                          */
6164                         add_it_now:
6165                                         if (stcb->asoc.state == 0) {
6166                                                 /* the assoc was freed? */
6167                                                 return (-7);
6168                                         }
6169                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6170                                                 return (-8);
6171                                         }
6172                                 } else if (stcb_tmp == stcb) {
6173                                         if (stcb->asoc.state == 0) {
6174                                                 /* the assoc was freed? */
6175                                                 return (-10);
6176                                         }
6177                                         if (net != NULL) {
6178                                                 /* clear flag */
6179                                                 net->dest_state &=
6180                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6181                                         }
6182                                 } else {
6183                                         /*
6184                                          * strange, address is in another
6185                                          * assoc? straighten out locks.
6186                                          */
6187                                         if (stcb_tmp) {
6188                                                 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6189                                                         struct mbuf *op_err;
6190                                                         char msg[SCTP_DIAG_INFO_LEN];
6191
6192                                                         /*
6193                                                          * in setup state we
6194                                                          * abort this guy
6195                                                          */
6196                                                         SCTP_SNPRINTF(msg, sizeof(msg),
6197                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6198                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6199                                                             msg);
6200                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6201                                                             stcb_tmp, op_err,
6202                                                             SCTP_SO_NOT_LOCKED);
6203                                                         goto add_it_now;
6204                                                 }
6205                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6206                                         }
6207
6208                                         if (stcb->asoc.state == 0) {
6209                                                 /* the assoc was freed? */
6210                                                 return (-12);
6211                                         }
6212                                         return (-13);
6213                                 }
6214                         }
6215                 } else
6216 #endif
6217 #ifdef INET6
6218                 if (ptype == SCTP_IPV6_ADDRESS) {
6219                         if (stcb->asoc.scope.ipv6_addr_legal) {
6220                                 /* ok get the v6 address and check/add */
6221                                 struct sctp_ipv6addr_param *p6, p6_buf;
6222
6223                                 phdr = sctp_get_next_param(m, offset,
6224                                     (struct sctp_paramhdr *)&p6_buf,
6225                                     sizeof(p6_buf));
6226                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6227                                     phdr == NULL) {
6228                                         return (-14);
6229                                 }
6230                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6231                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6232                                     sizeof(p6->addr));
6233                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6234                                         /* Skip multi-cast addresses */
6235                                         goto next_param;
6236                                 }
6237                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6238                                         /*
6239                                          * Link local make no sense without
6240                                          * scope
6241                                          */
6242                                         goto next_param;
6243                                 }
6244                                 sa = (struct sockaddr *)&sin6;
6245                                 inp = stcb->sctp_ep;
6246                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6247                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6248                                     dst, stcb);
6249                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6250                                 if (stcb_tmp == NULL &&
6251                                     (inp == stcb->sctp_ep || inp == NULL)) {
6252                                         /*
6253                                          * we must validate the state again
6254                                          * here
6255                                          */
6256                         add_it_now6:
6257                                         if (stcb->asoc.state == 0) {
6258                                                 /* the assoc was freed? */
6259                                                 return (-16);
6260                                         }
6261                                         /*
6262                                          * we must add the address, no scope
6263                                          * set
6264                                          */
6265                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6266                                                 return (-17);
6267                                         }
6268                                 } else if (stcb_tmp == stcb) {
6269                                         /*
6270                                          * we must validate the state again
6271                                          * here
6272                                          */
6273                                         if (stcb->asoc.state == 0) {
6274                                                 /* the assoc was freed? */
6275                                                 return (-19);
6276                                         }
6277                                         if (net != NULL) {
6278                                                 /* clear flag */
6279                                                 net->dest_state &=
6280                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6281                                         }
6282                                 } else {
6283                                         /*
6284                                          * strange, address is in another
6285                                          * assoc? straighten out locks.
6286                                          */
6287                                         if (stcb_tmp) {
6288                                                 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6289                                                         struct mbuf *op_err;
6290                                                         char msg[SCTP_DIAG_INFO_LEN];
6291
6292                                                         /*
6293                                                          * in setup state we
6294                                                          * abort this guy
6295                                                          */
6296                                                         SCTP_SNPRINTF(msg, sizeof(msg),
6297                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6298                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6299                                                             msg);
6300                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6301                                                             stcb_tmp, op_err,
6302                                                             SCTP_SO_NOT_LOCKED);
6303                                                         goto add_it_now6;
6304                                                 }
6305                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6306                                         }
6307                                         if (stcb->asoc.state == 0) {
6308                                                 /* the assoc was freed? */
6309                                                 return (-21);
6310                                         }
6311                                         return (-22);
6312                                 }
6313                         }
6314                 } else
6315 #endif
6316                 if (ptype == SCTP_ECN_CAPABLE) {
6317                         peer_supports_ecn = 1;
6318                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6319                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6320                                 struct sctp_adaptation_layer_indication ai,
6321                                                                 *aip;
6322
6323                                 phdr = sctp_get_next_param(m, offset,
6324                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6325                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6326                                 if (aip) {
6327                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6328                                         stcb->asoc.adaptation_needed = 1;
6329                                 }
6330                         }
6331                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6332                         struct sctp_asconf_addr_param lstore, *fee;
6333                         int lptype;
6334                         struct sockaddr *lsa = NULL;
6335 #ifdef INET
6336                         struct sctp_asconf_addrv4_param *fii;
6337 #endif
6338
6339                         if (stcb->asoc.asconf_supported == 0) {
6340                                 return (-100);
6341                         }
6342                         if (plen > sizeof(lstore)) {
6343                                 return (-23);
6344                         }
6345                         if (plen < sizeof(struct sctp_asconf_addrv4_param)) {
6346                                 return (-101);
6347                         }
6348                         phdr = sctp_get_next_param(m, offset,
6349                             (struct sctp_paramhdr *)&lstore,
6350                             plen);
6351                         if (phdr == NULL) {
6352                                 return (-24);
6353                         }
6354                         fee = (struct sctp_asconf_addr_param *)phdr;
6355                         lptype = ntohs(fee->addrp.ph.param_type);
6356                         switch (lptype) {
6357 #ifdef INET
6358                         case SCTP_IPV4_ADDRESS:
6359                                 if (plen !=
6360                                     sizeof(struct sctp_asconf_addrv4_param)) {
6361                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6362                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6363                                             plen);
6364                                 } else {
6365                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6366                                         sin.sin_addr.s_addr = fii->addrp.addr;
6367                                         lsa = (struct sockaddr *)&sin;
6368                                 }
6369                                 break;
6370 #endif
6371 #ifdef INET6
6372                         case SCTP_IPV6_ADDRESS:
6373                                 if (plen !=
6374                                     sizeof(struct sctp_asconf_addr_param)) {
6375                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6376                                             (int)sizeof(struct sctp_asconf_addr_param),
6377                                             plen);
6378                                 } else {
6379                                         memcpy(sin6.sin6_addr.s6_addr,
6380                                             fee->addrp.addr,
6381                                             sizeof(fee->addrp.addr));
6382                                         lsa = (struct sockaddr *)&sin6;
6383                                 }
6384                                 break;
6385 #endif
6386                         default:
6387                                 break;
6388                         }
6389                         if (lsa) {
6390                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6391                         }
6392                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6393                         stcb->asoc.peer_supports_nat = 1;
6394                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6395                         /* Peer supports pr-sctp */
6396                         peer_supports_prsctp = 1;
6397                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6398                         /* A supported extension chunk */
6399                         struct sctp_supported_chunk_types_param *pr_supported;
6400                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6401                         int num_ent, i;
6402
6403                         if (plen > sizeof(local_store)) {
6404                                 return (-35);
6405                         }
6406                         phdr = sctp_get_next_param(m, offset,
6407                             (struct sctp_paramhdr *)&local_store, plen);
6408                         if (phdr == NULL) {
6409                                 return (-25);
6410                         }
6411                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6412                         num_ent = plen - sizeof(struct sctp_paramhdr);
6413                         for (i = 0; i < num_ent; i++) {
6414                                 switch (pr_supported->chunk_types[i]) {
6415                                 case SCTP_ASCONF:
6416                                         peer_supports_asconf = 1;
6417                                         break;
6418                                 case SCTP_ASCONF_ACK:
6419                                         peer_supports_asconf_ack = 1;
6420                                         break;
6421                                 case SCTP_FORWARD_CUM_TSN:
6422                                         peer_supports_prsctp = 1;
6423                                         break;
6424                                 case SCTP_PACKET_DROPPED:
6425                                         peer_supports_pktdrop = 1;
6426                                         break;
6427                                 case SCTP_NR_SELECTIVE_ACK:
6428                                         peer_supports_nrsack = 1;
6429                                         break;
6430                                 case SCTP_STREAM_RESET:
6431                                         peer_supports_reconfig = 1;
6432                                         break;
6433                                 case SCTP_AUTHENTICATION:
6434                                         peer_supports_auth = 1;
6435                                         break;
6436                                 case SCTP_IDATA:
6437                                         peer_supports_idata = 1;
6438                                         break;
6439                                 default:
6440                                         /* one I have not learned yet */
6441                                         break;
6442
6443                                 }
6444                         }
6445                 } else if (ptype == SCTP_RANDOM) {
6446                         if (plen > sizeof(random_store))
6447                                 break;
6448                         if (got_random) {
6449                                 /* already processed a RANDOM */
6450                                 goto next_param;
6451                         }
6452                         phdr = sctp_get_next_param(m, offset,
6453                             (struct sctp_paramhdr *)random_store,
6454                             plen);
6455                         if (phdr == NULL)
6456                                 return (-26);
6457                         p_random = (struct sctp_auth_random *)phdr;
6458                         random_len = plen - sizeof(*p_random);
6459                         /* enforce the random length */
6460                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6461                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6462                                 return (-27);
6463                         }
6464                         got_random = 1;
6465                 } else if (ptype == SCTP_HMAC_LIST) {
6466                         uint16_t num_hmacs;
6467                         uint16_t i;
6468
6469                         if (plen > sizeof(hmacs_store))
6470                                 break;
6471                         if (got_hmacs) {
6472                                 /* already processed a HMAC list */
6473                                 goto next_param;
6474                         }
6475                         phdr = sctp_get_next_param(m, offset,
6476                             (struct sctp_paramhdr *)hmacs_store,
6477                             plen);
6478                         if (phdr == NULL)
6479                                 return (-28);
6480                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6481                         hmacs_len = plen - sizeof(*hmacs);
6482                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6483                         /* validate the hmac list */
6484                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6485                                 return (-29);
6486                         }
6487                         if (stcb->asoc.peer_hmacs != NULL)
6488                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6489                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6490                         if (stcb->asoc.peer_hmacs != NULL) {
6491                                 for (i = 0; i < num_hmacs; i++) {
6492                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6493                                             ntohs(hmacs->hmac_ids[i]));
6494                                 }
6495                         }
6496                         got_hmacs = 1;
6497                 } else if (ptype == SCTP_CHUNK_LIST) {
6498                         int i;
6499
6500                         if (plen > sizeof(chunks_store))
6501                                 break;
6502                         if (got_chklist) {
6503                                 /* already processed a Chunks list */
6504                                 goto next_param;
6505                         }
6506                         phdr = sctp_get_next_param(m, offset,
6507                             (struct sctp_paramhdr *)chunks_store,
6508                             plen);
6509                         if (phdr == NULL)
6510                                 return (-30);
6511                         chunks = (struct sctp_auth_chunk_list *)phdr;
6512                         num_chunks = plen - sizeof(*chunks);
6513                         if (stcb->asoc.peer_auth_chunks != NULL)
6514                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6515                         else
6516                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6517                         for (i = 0; i < num_chunks; i++) {
6518                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6519                                     stcb->asoc.peer_auth_chunks);
6520                                 /* record asconf/asconf-ack if listed */
6521                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6522                                         saw_asconf = 1;
6523                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6524                                         saw_asconf_ack = 1;
6525
6526                         }
6527                         got_chklist = 1;
6528                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6529                             (ptype == SCTP_STATE_COOKIE) ||
6530                             (ptype == SCTP_UNRECOG_PARAM) ||
6531                             (ptype == SCTP_COOKIE_PRESERVE) ||
6532                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6533                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6534                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6535                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6536                     (ptype == SCTP_SUCCESS_REPORT)) {
6537                          /* don't care */ ;
6538                 } else {
6539                         if ((ptype & 0x8000) == 0x0000) {
6540                                 /*
6541                                  * must stop processing the rest of the
6542                                  * param's. Any report bits were handled
6543                                  * with the call to
6544                                  * sctp_arethere_unrecognized_parameters()
6545                                  * when the INIT or INIT-ACK was first seen.
6546                                  */
6547                                 break;
6548                         }
6549                 }
6550
6551 next_param:
6552                 offset += SCTP_SIZE32(plen);
6553                 if (offset >= limit) {
6554                         break;
6555                 }
6556                 phdr = sctp_get_next_param(m, offset, &param_buf,
6557                     sizeof(param_buf));
6558         }
6559         /* Now check to see if we need to purge any addresses */
6560         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6561                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6562                     SCTP_ADDR_NOT_IN_ASSOC) {
6563                         /* This address has been removed from the asoc */
6564                         /* remove and free it */
6565                         stcb->asoc.numnets--;
6566                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6567                         sctp_free_remote_addr(net);
6568                         if (net == stcb->asoc.primary_destination) {
6569                                 stcb->asoc.primary_destination = NULL;
6570                                 sctp_select_primary_destination(stcb);
6571                         }
6572                 }
6573         }
6574         if ((stcb->asoc.ecn_supported == 1) &&
6575             (peer_supports_ecn == 0)) {
6576                 stcb->asoc.ecn_supported = 0;
6577         }
6578         if ((stcb->asoc.prsctp_supported == 1) &&
6579             (peer_supports_prsctp == 0)) {
6580                 stcb->asoc.prsctp_supported = 0;
6581         }
6582         if ((stcb->asoc.auth_supported == 1) &&
6583             ((peer_supports_auth == 0) ||
6584             (got_random == 0) || (got_hmacs == 0))) {
6585                 stcb->asoc.auth_supported = 0;
6586         }
6587         if ((stcb->asoc.asconf_supported == 1) &&
6588             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6589             (stcb->asoc.auth_supported == 0) ||
6590             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6591                 stcb->asoc.asconf_supported = 0;
6592         }
6593         if ((stcb->asoc.reconfig_supported == 1) &&
6594             (peer_supports_reconfig == 0)) {
6595                 stcb->asoc.reconfig_supported = 0;
6596         }
6597         if ((stcb->asoc.idata_supported == 1) &&
6598             (peer_supports_idata == 0)) {
6599                 stcb->asoc.idata_supported = 0;
6600         }
6601         if ((stcb->asoc.nrsack_supported == 1) &&
6602             (peer_supports_nrsack == 0)) {
6603                 stcb->asoc.nrsack_supported = 0;
6604         }
6605         if ((stcb->asoc.pktdrop_supported == 1) &&
6606             (peer_supports_pktdrop == 0)) {
6607                 stcb->asoc.pktdrop_supported = 0;
6608         }
6609         /* validate authentication required parameters */
6610         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6611                 /* peer does not support auth but sent a chunks list? */
6612                 return (-31);
6613         }
6614         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6615                 /* peer supports asconf but not auth? */
6616                 return (-32);
6617         } else if ((peer_supports_asconf == 1) &&
6618                     (peer_supports_auth == 1) &&
6619             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6620                 return (-33);
6621         }
6622         /* concatenate the full random key */
6623         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6624         if (chunks != NULL) {
6625                 keylen += sizeof(*chunks) + num_chunks;
6626         }
6627         new_key = sctp_alloc_key(keylen);
6628         if (new_key != NULL) {
6629                 /* copy in the RANDOM */
6630                 if (p_random != NULL) {
6631                         keylen = sizeof(*p_random) + random_len;
6632                         memcpy(new_key->key, p_random, keylen);
6633                 } else {
6634                         keylen = 0;
6635                 }
6636                 /* append in the AUTH chunks */
6637                 if (chunks != NULL) {
6638                         memcpy(new_key->key + keylen, chunks,
6639                             sizeof(*chunks) + num_chunks);
6640                         keylen += sizeof(*chunks) + num_chunks;
6641                 }
6642                 /* append in the HMACs */
6643                 if (hmacs != NULL) {
6644                         memcpy(new_key->key + keylen, hmacs,
6645                             sizeof(*hmacs) + hmacs_len);
6646                 }
6647         } else {
6648                 /* failed to get memory for the key */
6649                 return (-34);
6650         }
6651         if (stcb->asoc.authinfo.peer_random != NULL)
6652                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6653         stcb->asoc.authinfo.peer_random = new_key;
6654         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6655         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6656
6657         return (0);
6658 }
6659
6660 int
6661 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6662     struct sctp_nets *net)
6663 {
6664         /* make sure the requested primary address exists in the assoc */
6665         if (net == NULL && sa)
6666                 net = sctp_findnet(stcb, sa);
6667
6668         if (net == NULL) {
6669                 /* didn't find the requested primary address! */
6670                 return (-1);
6671         } else {
6672                 /* set the primary address */
6673                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6674                         /* Must be confirmed, so queue to set */
6675                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6676                         return (0);
6677                 }
6678                 stcb->asoc.primary_destination = net;
6679                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6680                         sctp_free_remote_addr(stcb->asoc.alternate);
6681                         stcb->asoc.alternate = NULL;
6682                 }
6683                 net = TAILQ_FIRST(&stcb->asoc.nets);
6684                 if (net != stcb->asoc.primary_destination) {
6685                         /*
6686                          * first one on the list is NOT the primary
6687                          * sctp_cmpaddr() is much more efficient if the
6688                          * primary is the first on the list, make it so.
6689                          */
6690                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6691                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6692                 }
6693                 return (0);
6694         }
6695 }
6696
6697 int
6698 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6699 {
6700         /*
6701          * This function serves two purposes. It will see if a TAG can be
6702          * re-used and return 1 for yes it is ok and 0 for don't use that
6703          * tag. A secondary function it will do is purge out old tags that
6704          * can be removed.
6705          */
6706         struct sctpvtaghead *chain;
6707         struct sctp_tagblock *twait_block;
6708         struct sctpasochead *head;
6709         struct sctp_tcb *stcb;
6710         int i;
6711
6712         SCTP_INP_INFO_RLOCK();
6713         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6714             SCTP_BASE_INFO(hashasocmark))];
6715         LIST_FOREACH(stcb, head, sctp_asocs) {
6716                 /*
6717                  * We choose not to lock anything here. TCB's can't be
6718                  * removed since we have the read lock, so they can't be
6719                  * freed on us, same thing for the INP. I may be wrong with
6720                  * this assumption, but we will go with it for now :-)
6721                  */
6722                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6723                         continue;
6724                 }
6725                 if (stcb->asoc.my_vtag == tag) {
6726                         /* candidate */
6727                         if (stcb->rport != rport) {
6728                                 continue;
6729                         }
6730                         if (stcb->sctp_ep->sctp_lport != lport) {
6731                                 continue;
6732                         }
6733                         /* Its a used tag set */
6734                         SCTP_INP_INFO_RUNLOCK();
6735                         return (0);
6736                 }
6737         }
6738         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6739         /* Now what about timed wait ? */
6740         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6741                 /*
6742                  * Block(s) are present, lets see if we have this tag in the
6743                  * list
6744                  */
6745                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6746                         if (twait_block->vtag_block[i].v_tag == 0) {
6747                                 /* not used */
6748                                 continue;
6749                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6750                             now->tv_sec) {
6751                                 /* Audit expires this guy */
6752                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6753                                 twait_block->vtag_block[i].v_tag = 0;
6754                                 twait_block->vtag_block[i].lport = 0;
6755                                 twait_block->vtag_block[i].rport = 0;
6756                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6757                                     (twait_block->vtag_block[i].lport == lport) &&
6758                             (twait_block->vtag_block[i].rport == rport)) {
6759                                 /* Bad tag, sorry :< */
6760                                 SCTP_INP_INFO_RUNLOCK();
6761                                 return (0);
6762                         }
6763                 }
6764         }
6765         SCTP_INP_INFO_RUNLOCK();
6766         return (1);
6767 }
6768
6769 static void
6770 sctp_drain_mbufs(struct sctp_tcb *stcb)
6771 {
6772         /*
6773          * We must hunt this association for MBUF's past the cumack (i.e.
6774          * out of order data that we can renege on).
6775          */
6776         struct sctp_association *asoc;
6777         struct sctp_tmit_chunk *chk, *nchk;
6778         uint32_t cumulative_tsn_p1;
6779         struct sctp_queued_to_read *control, *ncontrol;
6780         int cnt, strmat;
6781         uint32_t gap, i;
6782         int fnd = 0;
6783
6784         /* We look for anything larger than the cum-ack + 1 */
6785
6786         asoc = &stcb->asoc;
6787         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6788                 /* none we can reneg on. */
6789                 return;
6790         }
6791         SCTP_STAT_INCR(sctps_protocol_drains_done);
6792         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6793         cnt = 0;
6794         /* Ok that was fun, now we will drain all the inbound streams? */
6795         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6796                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) {
6797 #ifdef INVARIANTS
6798                         if (control->on_strm_q != SCTP_ON_ORDERED) {
6799                                 panic("Huh control: %p on_q: %d -- not ordered?",
6800                                     control, control->on_strm_q);
6801                         }
6802 #endif
6803                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6804                                 /* Yep it is above cum-ack */
6805                                 cnt++;
6806                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6807                                 KASSERT(control->length > 0, ("control has zero length"));
6808                                 if (asoc->size_on_all_streams >= control->length) {
6809                                         asoc->size_on_all_streams -= control->length;
6810                                 } else {
6811 #ifdef INVARIANTS
6812                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6813 #else
6814                                         asoc->size_on_all_streams = 0;
6815 #endif
6816                                 }
6817                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6818                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6819                                 if (control->on_read_q) {
6820                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6821                                         control->on_read_q = 0;
6822                                 }
6823                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm);
6824                                 control->on_strm_q = 0;
6825                                 if (control->data) {
6826                                         sctp_m_freem(control->data);
6827                                         control->data = NULL;
6828                                 }
6829                                 sctp_free_remote_addr(control->whoFrom);
6830                                 /* Now its reasm? */
6831                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6832                                         cnt++;
6833                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6834                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6835                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6836                                                 asoc->size_on_reasm_queue -= chk->send_size;
6837                                         } else {
6838 #ifdef INVARIANTS
6839                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6840 #else
6841                                                 asoc->size_on_reasm_queue = 0;
6842 #endif
6843                                         }
6844                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6845                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6846                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6847                                         if (chk->data) {
6848                                                 sctp_m_freem(chk->data);
6849                                                 chk->data = NULL;
6850                                         }
6851                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6852                                 }
6853                                 sctp_free_a_readq(stcb, control);
6854                         }
6855                 }
6856                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) {
6857 #ifdef INVARIANTS
6858                         if (control->on_strm_q != SCTP_ON_UNORDERED) {
6859                                 panic("Huh control: %p on_q: %d -- not unordered?",
6860                                     control, control->on_strm_q);
6861                         }
6862 #endif
6863                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6864                                 /* Yep it is above cum-ack */
6865                                 cnt++;
6866                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6867                                 KASSERT(control->length > 0, ("control has zero length"));
6868                                 if (asoc->size_on_all_streams >= control->length) {
6869                                         asoc->size_on_all_streams -= control->length;
6870                                 } else {
6871 #ifdef INVARIANTS
6872                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6873 #else
6874                                         asoc->size_on_all_streams = 0;
6875 #endif
6876                                 }
6877                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6878                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6879                                 if (control->on_read_q) {
6880                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6881                                         control->on_read_q = 0;
6882                                 }
6883                                 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm);
6884                                 control->on_strm_q = 0;
6885                                 if (control->data) {
6886                                         sctp_m_freem(control->data);
6887                                         control->data = NULL;
6888                                 }
6889                                 sctp_free_remote_addr(control->whoFrom);
6890                                 /* Now its reasm? */
6891                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6892                                         cnt++;
6893                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6894                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6895                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6896                                                 asoc->size_on_reasm_queue -= chk->send_size;
6897                                         } else {
6898 #ifdef INVARIANTS
6899                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6900 #else
6901                                                 asoc->size_on_reasm_queue = 0;
6902 #endif
6903                                         }
6904                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6905                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6906                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6907                                         if (chk->data) {
6908                                                 sctp_m_freem(chk->data);
6909                                                 chk->data = NULL;
6910                                         }
6911                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6912                                 }
6913                                 sctp_free_a_readq(stcb, control);
6914                         }
6915                 }
6916         }
6917         if (cnt) {
6918                 /* We must back down to see what the new highest is */
6919                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6920                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6921                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6922                                 asoc->highest_tsn_inside_map = i;
6923                                 fnd = 1;
6924                                 break;
6925                         }
6926                 }
6927                 if (!fnd) {
6928                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6929                 }
6930
6931                 /*
6932                  * Question, should we go through the delivery queue? The
6933                  * only reason things are on here is the app not reading OR
6934                  * a p-d-api up. An attacker COULD send enough in to
6935                  * initiate the PD-API and then send a bunch of stuff to
6936                  * other streams... these would wind up on the delivery
6937                  * queue.. and then we would not get to them. But in order
6938                  * to do this I then have to back-track and un-deliver
6939                  * sequence numbers in streams.. el-yucko. I think for now
6940                  * we will NOT look at the delivery queue and leave it to be
6941                  * something to consider later. An alternative would be to
6942                  * abort the P-D-API with a notification and then deliver
6943                  * the data.... Or another method might be to keep track of
6944                  * how many times the situation occurs and if we see a
6945                  * possible attack underway just abort the association.
6946                  */
6947 #ifdef SCTP_DEBUG
6948                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6949 #endif
6950                 /*
6951                  * Now do we need to find a new
6952                  * asoc->highest_tsn_inside_map?
6953                  */
6954                 asoc->last_revoke_count = cnt;
6955                 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
6956                     SCTP_FROM_SCTP_PCB + SCTP_LOC_11);
6957                 /* sa_ignore NO_NULL_CHK */
6958                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6959                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6960         }
6961         /*
6962          * Another issue, in un-setting the TSN's in the mapping array we
6963          * DID NOT adjust the highest_tsn marker.  This will cause one of
6964          * two things to occur. It may cause us to do extra work in checking
6965          * for our mapping array movement. More importantly it may cause us
6966          * to SACK every datagram. This may not be a bad thing though since
6967          * we will recover once we get our cum-ack above and all this stuff
6968          * we dumped recovered.
6969          */
6970 }
6971
6972 void
6973 sctp_drain()
6974 {
6975         /*
6976          * We must walk the PCB lists for ALL associations here. The system
6977          * is LOW on MBUF's and needs help. This is where reneging will
6978          * occur. We really hope this does NOT happen!
6979          */
6980         VNET_ITERATOR_DECL(vnet_iter);
6981         VNET_LIST_RLOCK_NOSLEEP();
6982         VNET_FOREACH(vnet_iter) {
6983                 CURVNET_SET(vnet_iter);
6984                 struct sctp_inpcb *inp;
6985                 struct sctp_tcb *stcb;
6986
6987                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6988                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6989 #ifdef VIMAGE
6990                         continue;
6991 #else
6992                         return;
6993 #endif
6994                 }
6995                 SCTP_INP_INFO_RLOCK();
6996                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6997                         /* For each endpoint */
6998                         SCTP_INP_RLOCK(inp);
6999                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7000                                 /* For each association */
7001                                 SCTP_TCB_LOCK(stcb);
7002                                 sctp_drain_mbufs(stcb);
7003                                 SCTP_TCB_UNLOCK(stcb);
7004                         }
7005                         SCTP_INP_RUNLOCK(inp);
7006                 }
7007                 SCTP_INP_INFO_RUNLOCK();
7008                 CURVNET_RESTORE();
7009         }
7010         VNET_LIST_RUNLOCK_NOSLEEP();
7011 }
7012
7013 /*
7014  * start a new iterator
7015  * iterates through all endpoints and associations based on the pcb_state
7016  * flags and asoc_state.  "af" (mandatory) is executed for all matching
7017  * assocs and "ef" (optional) is executed when the iterator completes.
7018  * "inpf" (optional) is executed for each new endpoint as it is being
7019  * iterated through. inpe (optional) is called when the inp completes
7020  * its way through all the stcbs.
7021  */
7022 int
7023 sctp_initiate_iterator(inp_func inpf,
7024     asoc_func af,
7025     inp_func inpe,
7026     uint32_t pcb_state,
7027     uint32_t pcb_features,
7028     uint32_t asoc_state,
7029     void *argp,
7030     uint32_t argi,
7031     end_func ef,
7032     struct sctp_inpcb *s_inp,
7033     uint8_t chunk_output_off)
7034 {
7035         struct sctp_iterator *it = NULL;
7036
7037         if (af == NULL) {
7038                 return (-1);
7039         }
7040         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7041                 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7042                     SCTP_BASE_VAR(sctp_pcb_initialized));
7043                 return (-1);
7044         }
7045         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7046             SCTP_M_ITER);
7047         if (it == NULL) {
7048                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7049                 return (-1);
7050         }
7051         memset(it, 0, sizeof(*it));
7052         it->function_assoc = af;
7053         it->function_inp = inpf;
7054         if (inpf)
7055                 it->done_current_ep = 0;
7056         else
7057                 it->done_current_ep = 1;
7058         it->function_atend = ef;
7059         it->pointer = argp;
7060         it->val = argi;
7061         it->pcb_flags = pcb_state;
7062         it->pcb_features = pcb_features;
7063         it->asoc_state = asoc_state;
7064         it->function_inp_end = inpe;
7065         it->no_chunk_output = chunk_output_off;
7066         it->vn = curvnet;
7067         if (s_inp) {
7068                 /* Assume lock is held here */
7069                 it->inp = s_inp;
7070                 SCTP_INP_INCR_REF(it->inp);
7071                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7072         } else {
7073                 SCTP_INP_INFO_RLOCK();
7074                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7075                 if (it->inp) {
7076                         SCTP_INP_INCR_REF(it->inp);
7077                 }
7078                 SCTP_INP_INFO_RUNLOCK();
7079                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7080
7081         }
7082         SCTP_IPI_ITERATOR_WQ_LOCK();
7083         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7084                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7085                 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7086                     SCTP_BASE_VAR(sctp_pcb_initialized), it);
7087                 SCTP_FREE(it, SCTP_M_ITER);
7088                 return (-1);
7089         }
7090         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7091         if (sctp_it_ctl.iterator_running == 0) {
7092                 sctp_wakeup_iterator();
7093         }
7094         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7095         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7096         return (0);
7097 }