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_rt);
3967                         hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum);
3968                         net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu);
3969                         if (rmtu == 0) {
3970                                 /*
3971                                  * Start things off to match mtu of
3972                                  * interface please.
3973                                  */
3974                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3975                                     net->ro.ro_rt, net->mtu);
3976                         }
3977                 }
3978         }
3979         if (net->mtu == 0) {
3980                 if (stcb->asoc.default_mtu > 0) {
3981                         net->mtu = stcb->asoc.default_mtu;
3982                         switch (net->ro._l_addr.sa.sa_family) {
3983 #ifdef INET
3984                         case AF_INET:
3985                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
3986                                 break;
3987 #endif
3988 #ifdef INET6
3989                         case AF_INET6:
3990                                 net->mtu += SCTP_MIN_OVERHEAD;
3991                                 break;
3992 #endif
3993                         default:
3994                                 break;
3995                         }
3996 #if defined(INET) || defined(INET6)
3997                         if (net->port) {
3998                                 net->mtu += (uint32_t)sizeof(struct udphdr);
3999                         }
4000 #endif
4001                 } else {
4002                         switch (newaddr->sa_family) {
4003 #ifdef INET
4004                         case AF_INET:
4005                                 net->mtu = SCTP_DEFAULT_MTU;
4006                                 break;
4007 #endif
4008 #ifdef INET6
4009                         case AF_INET6:
4010                                 net->mtu = 1280;
4011                                 break;
4012 #endif
4013                         default:
4014                                 break;
4015                         }
4016                 }
4017         }
4018 #if defined(INET) || defined(INET6)
4019         if (net->port) {
4020                 net->mtu -= (uint32_t)sizeof(struct udphdr);
4021         }
4022 #endif
4023         if (from == SCTP_ALLOC_ASOC) {
4024                 stcb->asoc.smallest_mtu = net->mtu;
4025         }
4026         if (stcb->asoc.smallest_mtu > net->mtu) {
4027                 sctp_pathmtu_adjustment(stcb, net->mtu);
4028         }
4029 #ifdef INET6
4030         if (newaddr->sa_family == AF_INET6) {
4031                 struct sockaddr_in6 *sin6;
4032
4033                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4034                 (void)sa6_recoverscope(sin6);
4035         }
4036 #endif
4037
4038         /* JRS - Use the congestion control given in the CC module */
4039         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4040                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4041
4042         /*
4043          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4044          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4045          */
4046         net->find_pseudo_cumack = 1;
4047         net->find_rtx_pseudo_cumack = 1;
4048         /* Choose an initial flowid. */
4049         net->flowid = stcb->asoc.my_vtag ^
4050             ntohs(stcb->rport) ^
4051             ntohs(stcb->sctp_ep->sctp_lport);
4052         net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4053         if (netp) {
4054                 *netp = net;
4055         }
4056         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4057         if (net->ro.ro_rt == NULL) {
4058                 /* Since we have no route put it at the back */
4059                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4060         } else if (netfirst == NULL) {
4061                 /* We are the first one in the pool. */
4062                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4063         } else if (netfirst->ro.ro_rt == NULL) {
4064                 /*
4065                  * First one has NO route. Place this one ahead of the first
4066                  * one.
4067                  */
4068                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4069         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4070                 /*
4071                  * This one has a different interface than the one at the
4072                  * top of the list. Place it ahead.
4073                  */
4074                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4075         } else {
4076                 /*
4077                  * Ok we have the same interface as the first one. Move
4078                  * forward until we find either a) one with a NULL route...
4079                  * insert ahead of that b) one with a different ifp.. insert
4080                  * after that. c) end of the list.. insert at the tail.
4081                  */
4082                 struct sctp_nets *netlook;
4083
4084                 do {
4085                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4086                         if (netlook == NULL) {
4087                                 /* End of the list */
4088                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4089                                 break;
4090                         } else if (netlook->ro.ro_rt == NULL) {
4091                                 /* next one has NO route */
4092                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4093                                 break;
4094                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4095                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4096                                     net, sctp_next);
4097                                 break;
4098                         }
4099                         /* Shift forward */
4100                         netfirst = netlook;
4101                 } while (netlook != NULL);
4102         }
4103
4104         /* got to have a primary set */
4105         if (stcb->asoc.primary_destination == 0) {
4106                 stcb->asoc.primary_destination = net;
4107         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4108                     (net->ro.ro_rt) &&
4109             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4110                 /* No route to current primary adopt new primary */
4111                 stcb->asoc.primary_destination = net;
4112         }
4113         /* Validate primary is first */
4114         net = TAILQ_FIRST(&stcb->asoc.nets);
4115         if ((net != stcb->asoc.primary_destination) &&
4116             (stcb->asoc.primary_destination)) {
4117                 /*
4118                  * first one on the list is NOT the primary sctp_cmpaddr()
4119                  * is much more efficient if the primary is the first on the
4120                  * list, make it so.
4121                  */
4122                 TAILQ_REMOVE(&stcb->asoc.nets,
4123                     stcb->asoc.primary_destination, sctp_next);
4124                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4125                     stcb->asoc.primary_destination, sctp_next);
4126         }
4127         return (0);
4128 }
4129
4130
4131 static uint32_t
4132 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4133 {
4134         uint32_t id;
4135         struct sctpasochead *head;
4136         struct sctp_tcb *lstcb;
4137
4138 try_again:
4139         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4140                 /* TSNH */
4141                 return (0);
4142         }
4143         /*
4144          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4145          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4146          */
4147         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4148                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4149         }
4150         id = inp->sctp_associd_counter;
4151         inp->sctp_associd_counter++;
4152         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4153         if (lstcb) {
4154                 goto try_again;
4155         }
4156         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4157         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4158         stcb->asoc.in_asocid_hash = 1;
4159         return (id);
4160 }
4161
4162 /*
4163  * allocate an association and add it to the endpoint. The caller must be
4164  * careful to add all additional addresses once they are know right away or
4165  * else the assoc will be may experience a blackout scenario.
4166  */
4167 struct sctp_tcb *
4168 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4169     int *error, uint32_t override_tag, uint32_t vrf_id,
4170     uint16_t o_streams, uint16_t port,
4171     struct thread *p,
4172     int initialize_auth_params)
4173 {
4174         /* note the p argument is only valid in unbound sockets */
4175
4176         struct sctp_tcb *stcb;
4177         struct sctp_association *asoc;
4178         struct sctpasochead *head;
4179         uint16_t rport;
4180         int err;
4181
4182         /*
4183          * Assumption made here: Caller has done a
4184          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4185          * address does not exist already.
4186          */
4187         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4188                 /* Hit max assoc, sorry no more */
4189                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4190                 *error = ENOBUFS;
4191                 return (NULL);
4192         }
4193         if (firstaddr == NULL) {
4194                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4195                 *error = EINVAL;
4196                 return (NULL);
4197         }
4198         SCTP_INP_RLOCK(inp);
4199         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4200             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4201             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4202                 /*
4203                  * If its in the TCP pool, its NOT allowed to create an
4204                  * association. The parent listener needs to call
4205                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4206                  * off, or connected one does this.. its an error.
4207                  */
4208                 SCTP_INP_RUNLOCK(inp);
4209                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4210                 *error = EINVAL;
4211                 return (NULL);
4212         }
4213         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4214             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4215                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4216                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4217                         SCTP_INP_RUNLOCK(inp);
4218                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4219                         *error = EINVAL;
4220                         return (NULL);
4221                 }
4222         }
4223         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4224 #ifdef SCTP_DEBUG
4225         if (firstaddr) {
4226                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4227                 switch (firstaddr->sa_family) {
4228 #ifdef INET
4229                 case AF_INET:
4230                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4231                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4232                         break;
4233 #endif
4234 #ifdef INET6
4235                 case AF_INET6:
4236                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4237                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4238                         break;
4239 #endif
4240                 default:
4241                         break;
4242                 }
4243         } else {
4244                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4245         }
4246 #endif                          /* SCTP_DEBUG */
4247         switch (firstaddr->sa_family) {
4248 #ifdef INET
4249         case AF_INET:
4250                 {
4251                         struct sockaddr_in *sin;
4252
4253                         sin = (struct sockaddr_in *)firstaddr;
4254                         if ((ntohs(sin->sin_port) == 0) ||
4255                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4256                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4257                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4258                                 /* Invalid address */
4259                                 SCTP_INP_RUNLOCK(inp);
4260                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4261                                 *error = EINVAL;
4262                                 return (NULL);
4263                         }
4264                         rport = sin->sin_port;
4265                         break;
4266                 }
4267 #endif
4268 #ifdef INET6
4269         case AF_INET6:
4270                 {
4271                         struct sockaddr_in6 *sin6;
4272
4273                         sin6 = (struct sockaddr_in6 *)firstaddr;
4274                         if ((ntohs(sin6->sin6_port) == 0) ||
4275                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4276                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4277                                 /* Invalid address */
4278                                 SCTP_INP_RUNLOCK(inp);
4279                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4280                                 *error = EINVAL;
4281                                 return (NULL);
4282                         }
4283                         rport = sin6->sin6_port;
4284                         break;
4285                 }
4286 #endif
4287         default:
4288                 /* not supported family type */
4289                 SCTP_INP_RUNLOCK(inp);
4290                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4291                 *error = EINVAL;
4292                 return (NULL);
4293         }
4294         SCTP_INP_RUNLOCK(inp);
4295         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4296                 /*
4297                  * If you have not performed a bind, then we need to do the
4298                  * ephemeral bind for you.
4299                  */
4300                 if ((err = sctp_inpcb_bind(inp->sctp_socket, NULL, NULL, p))) {
4301                         /* bind error, probably perm */
4302                         *error = err;
4303                         return (NULL);
4304                 }
4305         }
4306         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4307         if (stcb == NULL) {
4308                 /* out of memory? */
4309                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4310                 *error = ENOMEM;
4311                 return (NULL);
4312         }
4313         SCTP_INCR_ASOC_COUNT();
4314
4315         memset(stcb, 0, sizeof(*stcb));
4316         asoc = &stcb->asoc;
4317
4318         SCTP_TCB_LOCK_INIT(stcb);
4319         SCTP_TCB_SEND_LOCK_INIT(stcb);
4320         stcb->rport = rport;
4321         /* setup back pointer's */
4322         stcb->sctp_ep = inp;
4323         stcb->sctp_socket = inp->sctp_socket;
4324         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
4325                 /* failed */
4326                 SCTP_TCB_LOCK_DESTROY(stcb);
4327                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4328                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4329                 SCTP_DECR_ASOC_COUNT();
4330                 *error = err;
4331                 return (NULL);
4332         }
4333         /* and the port */
4334         SCTP_INP_INFO_WLOCK();
4335         SCTP_INP_WLOCK(inp);
4336         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4337                 /* inpcb freed while alloc going on */
4338                 SCTP_TCB_LOCK_DESTROY(stcb);
4339                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4340                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4341                 SCTP_INP_WUNLOCK(inp);
4342                 SCTP_INP_INFO_WUNLOCK();
4343                 SCTP_DECR_ASOC_COUNT();
4344                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4345                 *error = EINVAL;
4346                 return (NULL);
4347         }
4348         SCTP_TCB_LOCK(stcb);
4349
4350         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4351         /* now that my_vtag is set, add it to the hash */
4352         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4353         /* put it in the bucket in the vtag hash of assoc's for the system */
4354         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4355         SCTP_INP_INFO_WUNLOCK();
4356
4357         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4358                 /* failure.. memory error? */
4359                 if (asoc->strmout) {
4360                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4361                         asoc->strmout = NULL;
4362                 }
4363                 if (asoc->mapping_array) {
4364                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4365                         asoc->mapping_array = NULL;
4366                 }
4367                 if (asoc->nr_mapping_array) {
4368                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4369                         asoc->nr_mapping_array = NULL;
4370                 }
4371                 SCTP_DECR_ASOC_COUNT();
4372                 SCTP_TCB_UNLOCK(stcb);
4373                 SCTP_TCB_LOCK_DESTROY(stcb);
4374                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4375                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4376                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4377                 SCTP_INP_WUNLOCK(inp);
4378                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4379                 *error = ENOBUFS;
4380                 return (NULL);
4381         }
4382         /* Init all the timers */
4383         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4384         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4385         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4386         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4387         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4388         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4389
4390         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4391         /* now file the port under the hash as well */
4392         if (inp->sctp_tcbhash != NULL) {
4393                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4394                     inp->sctp_hashmark)];
4395                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4396         }
4397         if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) {
4398                 sctp_initialize_auth_params(inp, stcb);
4399         }
4400         SCTP_INP_WUNLOCK(inp);
4401         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4402         return (stcb);
4403 }
4404
4405
4406 void
4407 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4408 {
4409         struct sctp_inpcb *inp;
4410         struct sctp_association *asoc;
4411
4412         inp = stcb->sctp_ep;
4413         asoc = &stcb->asoc;
4414         asoc->numnets--;
4415         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4416         if (net == asoc->primary_destination) {
4417                 /* Reset primary */
4418                 struct sctp_nets *lnet;
4419
4420                 lnet = TAILQ_FIRST(&asoc->nets);
4421                 /*
4422                  * Mobility adaptation Ideally, if deleted destination is
4423                  * the primary, it becomes a fast retransmission trigger by
4424                  * the subsequent SET PRIMARY. (by micchie)
4425                  */
4426                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4427                     SCTP_MOBILITY_BASE) ||
4428                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4429                     SCTP_MOBILITY_FASTHANDOFF)) {
4430                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4431                         if (asoc->deleted_primary != NULL) {
4432                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4433                                 goto out;
4434                         }
4435                         asoc->deleted_primary = net;
4436                         atomic_add_int(&net->ref_count, 1);
4437                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4438                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4439                         sctp_mobility_feature_on(stcb->sctp_ep,
4440                             SCTP_MOBILITY_PRIM_DELETED);
4441                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4442                             stcb->sctp_ep, stcb, NULL);
4443                 }
4444 out:
4445                 /* Try to find a confirmed primary */
4446                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4447         }
4448         if (net == asoc->last_data_chunk_from) {
4449                 /* Reset primary */
4450                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4451         }
4452         if (net == asoc->last_control_chunk_from) {
4453                 /* Clear net */
4454                 asoc->last_control_chunk_from = NULL;
4455         }
4456         if (net == stcb->asoc.alternate) {
4457                 sctp_free_remote_addr(stcb->asoc.alternate);
4458                 stcb->asoc.alternate = NULL;
4459         }
4460         sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
4461             SCTP_FROM_SCTP_PCB + SCTP_LOC_9);
4462         sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
4463             SCTP_FROM_SCTP_PCB + SCTP_LOC_10);
4464         net->dest_state |= SCTP_ADDR_BEING_DELETED;
4465         sctp_free_remote_addr(net);
4466 }
4467
4468 /*
4469  * remove a remote endpoint address from an association, it will fail if the
4470  * address does not exist.
4471  */
4472 int
4473 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4474 {
4475         /*
4476          * Here we need to remove a remote address. This is quite simple, we
4477          * first find it in the list of address for the association
4478          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4479          * on that item. Note we do not allow it to be removed if there are
4480          * no other addresses.
4481          */
4482         struct sctp_association *asoc;
4483         struct sctp_nets *net, *nnet;
4484
4485         asoc = &stcb->asoc;
4486
4487         /* locate the address */
4488         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4489                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4490                         continue;
4491                 }
4492                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4493                     remaddr)) {
4494                         /* we found the guy */
4495                         if (asoc->numnets < 2) {
4496                                 /* Must have at LEAST two remote addresses */
4497                                 return (-1);
4498                         } else {
4499                                 sctp_remove_net(stcb, net);
4500                                 return (0);
4501                         }
4502                 }
4503         }
4504         /* not found. */
4505         return (-2);
4506 }
4507
4508 void
4509 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4510 {
4511         struct sctpvtaghead *chain;
4512         struct sctp_tagblock *twait_block;
4513         int found = 0;
4514         int i;
4515
4516         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4517         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4518                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4519                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4520                             (twait_block->vtag_block[i].lport == lport) &&
4521                             (twait_block->vtag_block[i].rport == rport)) {
4522                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4523                                 twait_block->vtag_block[i].v_tag = 0;
4524                                 twait_block->vtag_block[i].lport = 0;
4525                                 twait_block->vtag_block[i].rport = 0;
4526                                 found = 1;
4527                                 break;
4528                         }
4529                 }
4530                 if (found)
4531                         break;
4532         }
4533 }
4534
4535 int
4536 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4537 {
4538         struct sctpvtaghead *chain;
4539         struct sctp_tagblock *twait_block;
4540         int found = 0;
4541         int i;
4542
4543         SCTP_INP_INFO_WLOCK();
4544         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4545         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4546                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4547                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4548                             (twait_block->vtag_block[i].lport == lport) &&
4549                             (twait_block->vtag_block[i].rport == rport)) {
4550                                 found = 1;
4551                                 break;
4552                         }
4553                 }
4554                 if (found)
4555                         break;
4556         }
4557         SCTP_INP_INFO_WUNLOCK();
4558         return (found);
4559 }
4560
4561
4562 void
4563 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4564 {
4565         struct sctpvtaghead *chain;
4566         struct sctp_tagblock *twait_block;
4567         struct timeval now;
4568         int set, i;
4569
4570         if (time == 0) {
4571                 /* Its disabled */
4572                 return;
4573         }
4574         (void)SCTP_GETTIME_TIMEVAL(&now);
4575         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4576         set = 0;
4577         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4578                 /* Block(s) present, lets find space, and expire on the fly */
4579                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4580                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4581                             !set) {
4582                                 twait_block->vtag_block[i].tv_sec_at_expire =
4583                                     now.tv_sec + time;
4584                                 twait_block->vtag_block[i].v_tag = tag;
4585                                 twait_block->vtag_block[i].lport = lport;
4586                                 twait_block->vtag_block[i].rport = rport;
4587                                 set = 1;
4588                         } else if ((twait_block->vtag_block[i].v_tag) &&
4589                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4590                                 /* Audit expires this guy */
4591                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4592                                 twait_block->vtag_block[i].v_tag = 0;
4593                                 twait_block->vtag_block[i].lport = 0;
4594                                 twait_block->vtag_block[i].rport = 0;
4595                                 if (set == 0) {
4596                                         /* Reuse it for my new tag */
4597                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4598                                         twait_block->vtag_block[i].v_tag = tag;
4599                                         twait_block->vtag_block[i].lport = lport;
4600                                         twait_block->vtag_block[i].rport = rport;
4601                                         set = 1;
4602                                 }
4603                         }
4604                 }
4605                 if (set) {
4606                         /*
4607                          * We only do up to the block where we can place our
4608                          * tag for audits
4609                          */
4610                         break;
4611                 }
4612         }
4613         /* Need to add a new block to chain */
4614         if (!set) {
4615                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4616                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4617                 if (twait_block == NULL) {
4618                         return;
4619                 }
4620                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4621                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4622                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4623                 twait_block->vtag_block[0].v_tag = tag;
4624                 twait_block->vtag_block[0].lport = lport;
4625                 twait_block->vtag_block[0].rport = rport;
4626         }
4627 }
4628
4629 void
4630 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4631 {
4632         struct sctp_tmit_chunk *chk, *nchk;
4633         struct sctp_queued_to_read *control, *ncontrol;
4634
4635         TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) {
4636                 TAILQ_REMOVE(rh, control, next_instrm);
4637                 control->on_strm_q = 0;
4638                 if (control->on_read_q == 0) {
4639                         sctp_free_remote_addr(control->whoFrom);
4640                         if (control->data) {
4641                                 sctp_m_freem(control->data);
4642                                 control->data = NULL;
4643                         }
4644                 }
4645                 /* Reassembly free? */
4646                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
4647                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
4648                         if (chk->data) {
4649                                 sctp_m_freem(chk->data);
4650                                 chk->data = NULL;
4651                         }
4652                         if (chk->holds_key_ref)
4653                                 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4654                         sctp_free_remote_addr(chk->whoTo);
4655                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4656                         SCTP_DECR_CHK_COUNT();
4657                         /* sa_ignore FREED_MEMORY */
4658                 }
4659                 /*
4660                  * We don't free the address here since all the net's were
4661                  * freed above.
4662                  */
4663                 if (control->on_read_q == 0) {
4664                         sctp_free_a_readq(stcb, control);
4665                 }
4666         }
4667 }
4668
4669 /*-
4670  * Free the association after un-hashing the remote port. This
4671  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4672  * expect that the input to this function IS a locked TCB.
4673  * It will return 0, if it did NOT destroy the association (instead
4674  * it unlocks it. It will return NON-zero if it either destroyed the
4675  * association OR the association is already destroyed.
4676  */
4677 int
4678 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4679 {
4680         int i;
4681         struct sctp_association *asoc;
4682         struct sctp_nets *net, *nnet;
4683         struct sctp_laddr *laddr, *naddr;
4684         struct sctp_tmit_chunk *chk, *nchk;
4685         struct sctp_asconf_addr *aparam, *naparam;
4686         struct sctp_asconf_ack *aack, *naack;
4687         struct sctp_stream_reset_list *strrst, *nstrrst;
4688         struct sctp_queued_to_read *sq, *nsq;
4689         struct sctp_stream_queue_pending *sp, *nsp;
4690         sctp_sharedkey_t *shared_key, *nshared_key;
4691         struct socket *so;
4692
4693         /* first, lets purge the entry from the hash table. */
4694
4695 #ifdef SCTP_LOG_CLOSING
4696         sctp_log_closing(inp, stcb, 6);
4697 #endif
4698         if (stcb->asoc.state == 0) {
4699 #ifdef SCTP_LOG_CLOSING
4700                 sctp_log_closing(inp, NULL, 7);
4701 #endif
4702                 /* there is no asoc, really TSNH :-0 */
4703                 return (1);
4704         }
4705         if (stcb->asoc.alternate) {
4706                 sctp_free_remote_addr(stcb->asoc.alternate);
4707                 stcb->asoc.alternate = NULL;
4708         }
4709         /* TEMP CODE */
4710         if (stcb->freed_from_where == 0) {
4711                 /* Only record the first place free happened from */
4712                 stcb->freed_from_where = from_location;
4713         }
4714         /* TEMP CODE */
4715
4716         asoc = &stcb->asoc;
4717         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4718             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4719                 /* nothing around */
4720                 so = NULL;
4721         else
4722                 so = inp->sctp_socket;
4723
4724         /*
4725          * We used timer based freeing if a reader or writer is in the way.
4726          * So we first check if we are actually being called from a timer,
4727          * if so we abort early if a reader or writer is still in the way.
4728          */
4729         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4730             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4731                 /*
4732                  * is it the timer driving us? if so are the reader/writers
4733                  * gone?
4734                  */
4735                 if (stcb->asoc.refcnt) {
4736                         /* nope, reader or writer in the way */
4737                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4738                         /* no asoc destroyed */
4739                         SCTP_TCB_UNLOCK(stcb);
4740 #ifdef SCTP_LOG_CLOSING
4741                         sctp_log_closing(inp, stcb, 8);
4742 #endif
4743                         return (0);
4744                 }
4745         }
4746         /* Now clean up any other timers */
4747         sctp_stop_association_timers(stcb, false);
4748         /* Now the read queue needs to be cleaned up (only once) */
4749         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4750                 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED);
4751                 SCTP_INP_READ_LOCK(inp);
4752                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4753                         if (sq->stcb == stcb) {
4754                                 sq->do_not_ref_stcb = 1;
4755                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4756                                 /*
4757                                  * If there is no end, there never will be
4758                                  * now.
4759                                  */
4760                                 if (sq->end_added == 0) {
4761                                         /* Held for PD-API clear that. */
4762                                         sq->pdapi_aborted = 1;
4763                                         sq->held_length = 0;
4764                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4765                                                 /*
4766                                                  * Need to add a PD-API
4767                                                  * aborted indication.
4768                                                  * Setting the control_pdapi
4769                                                  * assures that it will be
4770                                                  * added right after this
4771                                                  * msg.
4772                                                  */
4773                                                 uint32_t strseq;
4774
4775                                                 stcb->asoc.control_pdapi = sq;
4776                                                 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff);
4777                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4778                                                     stcb,
4779                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4780                                                     (void *)&strseq,
4781                                                     SCTP_SO_LOCKED);
4782                                                 stcb->asoc.control_pdapi = NULL;
4783                                         }
4784                                 }
4785                                 /* Add an end to wake them */
4786                                 sq->end_added = 1;
4787                         }
4788                 }
4789                 SCTP_INP_READ_UNLOCK(inp);
4790                 if (stcb->block_entry) {
4791                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4792                         stcb->block_entry->error = ECONNRESET;
4793                         stcb->block_entry = NULL;
4794                 }
4795         }
4796         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4797                 /*
4798                  * Someone holds a reference OR the socket is unaccepted
4799                  * yet.
4800                  */
4801                 if ((stcb->asoc.refcnt) ||
4802                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4803                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4804                         SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4805                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4806                 }
4807                 SCTP_TCB_UNLOCK(stcb);
4808                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4809                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4810                         /* nothing around */
4811                         so = NULL;
4812                 if (so) {
4813                         /* Wake any reader/writers */
4814                         sctp_sorwakeup(inp, so);
4815                         sctp_sowwakeup(inp, so);
4816                 }
4817
4818 #ifdef SCTP_LOG_CLOSING
4819                 sctp_log_closing(inp, stcb, 9);
4820 #endif
4821                 /* no asoc destroyed */
4822                 return (0);
4823         }
4824 #ifdef SCTP_LOG_CLOSING
4825         sctp_log_closing(inp, stcb, 10);
4826 #endif
4827         /*
4828          * When I reach here, no others want to kill the assoc yet.. and I
4829          * own the lock. Now its possible an abort comes in when I do the
4830          * lock exchange below to grab all the locks to do the final take
4831          * out. to prevent this we increment the count, which will start a
4832          * timer and blow out above thus assuring us that we hold exclusive
4833          * killing of the asoc. Note that after getting back the TCB lock we
4834          * will go ahead and increment the counter back up and stop any
4835          * timer a passing stranger may have started :-S
4836          */
4837         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4838                 atomic_add_int(&stcb->asoc.refcnt, 1);
4839
4840                 SCTP_TCB_UNLOCK(stcb);
4841                 SCTP_INP_INFO_WLOCK();
4842                 SCTP_INP_WLOCK(inp);
4843                 SCTP_TCB_LOCK(stcb);
4844         }
4845         /* Double check the GONE flag */
4846         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4847             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4848                 /* nothing around */
4849                 so = NULL;
4850
4851         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4852             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4853                 /*
4854                  * For TCP type we need special handling when we are
4855                  * connected. We also include the peel'ed off ones to.
4856                  */
4857                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4858                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4859                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4860                         if (so) {
4861                                 SOCKBUF_LOCK(&so->so_rcv);
4862                                 so->so_state &= ~(SS_ISCONNECTING |
4863                                     SS_ISDISCONNECTING |
4864                                     SS_ISCONFIRMING |
4865                                     SS_ISCONNECTED);
4866                                 so->so_state |= SS_ISDISCONNECTED;
4867                                 socantrcvmore_locked(so);
4868                                 socantsendmore(so);
4869                                 sctp_sowwakeup(inp, so);
4870                                 sctp_sorwakeup(inp, so);
4871                                 SCTP_SOWAKEUP(so);
4872                         }
4873                 }
4874         }
4875
4876         /*
4877          * Make it invalid too, that way if its about to run it will abort
4878          * and return.
4879          */
4880         /* re-increment the lock */
4881         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4882                 atomic_add_int(&stcb->asoc.refcnt, -1);
4883         }
4884         if (stcb->asoc.refcnt) {
4885                 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4886                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4887                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4888                         SCTP_INP_INFO_WUNLOCK();
4889                         SCTP_INP_WUNLOCK(inp);
4890                 }
4891                 SCTP_TCB_UNLOCK(stcb);
4892                 return (0);
4893         }
4894         asoc->state = 0;
4895         if (inp->sctp_tcbhash) {
4896                 LIST_REMOVE(stcb, sctp_tcbhash);
4897         }
4898         if (stcb->asoc.in_asocid_hash) {
4899                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4900         }
4901         /* Now lets remove it from the list of ALL associations in the EP */
4902         LIST_REMOVE(stcb, sctp_tcblist);
4903         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4904                 SCTP_INP_INCR_REF(inp);
4905                 SCTP_INP_WUNLOCK(inp);
4906         }
4907         /* pull from vtag hash */
4908         LIST_REMOVE(stcb, sctp_asocs);
4909         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4910             inp->sctp_lport, stcb->rport);
4911
4912         /*
4913          * Now restop the timers to be sure this is paranoia at is finest!
4914          */
4915         sctp_stop_association_timers(stcb, true);
4916
4917         /*
4918          * The chunk lists and such SHOULD be empty but we check them just
4919          * in case.
4920          */
4921         /* anything on the wheel needs to be removed */
4922         SCTP_TCB_SEND_LOCK(stcb);
4923         for (i = 0; i < asoc->streamoutcnt; i++) {
4924                 struct sctp_stream_out *outs;
4925
4926                 outs = &asoc->strmout[i];
4927                 /* now clean up any chunks here */
4928                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4929                         atomic_subtract_int(&asoc->stream_queue_cnt, 1);
4930                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4931                         stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1);
4932                         sctp_free_spbufspace(stcb, asoc, sp);
4933                         if (sp->data) {
4934                                 if (so) {
4935                                         /* Still an open socket - report */
4936                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4937                                             0, (void *)sp, SCTP_SO_LOCKED);
4938                                 }
4939                                 if (sp->data) {
4940                                         sctp_m_freem(sp->data);
4941                                         sp->data = NULL;
4942                                         sp->tail_mbuf = NULL;
4943                                         sp->length = 0;
4944                                 }
4945                         }
4946                         if (sp->net) {
4947                                 sctp_free_remote_addr(sp->net);
4948                                 sp->net = NULL;
4949                         }
4950                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4951                 }
4952         }
4953         SCTP_TCB_SEND_UNLOCK(stcb);
4954         /* sa_ignore FREED_MEMORY */
4955         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4956                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4957                 SCTP_FREE(strrst, SCTP_M_STRESET);
4958         }
4959         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4960                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4961                 if (sq->data) {
4962                         sctp_m_freem(sq->data);
4963                         sq->data = NULL;
4964                 }
4965                 sctp_free_remote_addr(sq->whoFrom);
4966                 sq->whoFrom = NULL;
4967                 sq->stcb = NULL;
4968                 /* Free the ctl entry */
4969                 sctp_free_a_readq(stcb, sq);
4970                 /* sa_ignore FREED_MEMORY */
4971         }
4972         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4973                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4974                 if (chk->data) {
4975                         sctp_m_freem(chk->data);
4976                         chk->data = NULL;
4977                 }
4978                 if (chk->holds_key_ref)
4979                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4980                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4981                 SCTP_DECR_CHK_COUNT();
4982                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4983                 asoc->free_chunk_cnt--;
4984                 /* sa_ignore FREED_MEMORY */
4985         }
4986         /* pending send queue SHOULD be empty */
4987         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4988                 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
4989                         asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
4990 #ifdef INVARIANTS
4991                 } else {
4992                         panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
4993 #endif
4994                 }
4995                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4996                 if (chk->data) {
4997                         if (so) {
4998                                 /* Still a socket? */
4999                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5000                                     0, chk, SCTP_SO_LOCKED);
5001                         }
5002                         if (chk->data) {
5003                                 sctp_m_freem(chk->data);
5004                                 chk->data = NULL;
5005                         }
5006                 }
5007                 if (chk->holds_key_ref)
5008                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5009                 if (chk->whoTo) {
5010                         sctp_free_remote_addr(chk->whoTo);
5011                         chk->whoTo = NULL;
5012                 }
5013                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5014                 SCTP_DECR_CHK_COUNT();
5015                 /* sa_ignore FREED_MEMORY */
5016         }
5017         /* sent queue SHOULD be empty */
5018         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5019                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5020                         if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5021                                 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5022 #ifdef INVARIANTS
5023                         } else {
5024                                 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5025 #endif
5026                         }
5027                 }
5028                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5029                 if (chk->data) {
5030                         if (so) {
5031                                 /* Still a socket? */
5032                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5033                                     0, chk, SCTP_SO_LOCKED);
5034                         }
5035                         if (chk->data) {
5036                                 sctp_m_freem(chk->data);
5037                                 chk->data = NULL;
5038                         }
5039                 }
5040                 if (chk->holds_key_ref)
5041                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5042                 sctp_free_remote_addr(chk->whoTo);
5043                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5044                 SCTP_DECR_CHK_COUNT();
5045                 /* sa_ignore FREED_MEMORY */
5046         }
5047 #ifdef INVARIANTS
5048         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5049                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5050                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5051                 }
5052         }
5053 #endif
5054         /* control queue MAY not be empty */
5055         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5056                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5057                 if (chk->data) {
5058                         sctp_m_freem(chk->data);
5059                         chk->data = NULL;
5060                 }
5061                 if (chk->holds_key_ref)
5062                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5063                 sctp_free_remote_addr(chk->whoTo);
5064                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5065                 SCTP_DECR_CHK_COUNT();
5066                 /* sa_ignore FREED_MEMORY */
5067         }
5068         /* ASCONF queue MAY not be empty */
5069         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5070                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5071                 if (chk->data) {
5072                         sctp_m_freem(chk->data);
5073                         chk->data = NULL;
5074                 }
5075                 if (chk->holds_key_ref)
5076                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5077                 sctp_free_remote_addr(chk->whoTo);
5078                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5079                 SCTP_DECR_CHK_COUNT();
5080                 /* sa_ignore FREED_MEMORY */
5081         }
5082         if (asoc->mapping_array) {
5083                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5084                 asoc->mapping_array = NULL;
5085         }
5086         if (asoc->nr_mapping_array) {
5087                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5088                 asoc->nr_mapping_array = NULL;
5089         }
5090         /* the stream outs */
5091         if (asoc->strmout) {
5092                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5093                 asoc->strmout = NULL;
5094         }
5095         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5096         if (asoc->strmin) {
5097                 for (i = 0; i < asoc->streamincnt; i++) {
5098                         sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5099                         sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5100                 }
5101                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5102                 asoc->strmin = NULL;
5103         }
5104         asoc->streamincnt = 0;
5105         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5106 #ifdef INVARIANTS
5107                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5108                         panic("no net's left alloc'ed, or list points to itself");
5109                 }
5110 #endif
5111                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5112                 sctp_free_remote_addr(net);
5113         }
5114         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5115                 /* sa_ignore FREED_MEMORY */
5116                 sctp_remove_laddr(laddr);
5117         }
5118
5119         /* pending asconf (address) parameters */
5120         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5121                 /* sa_ignore FREED_MEMORY */
5122                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5123                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5124         }
5125         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5126                 /* sa_ignore FREED_MEMORY */
5127                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5128                 if (aack->data != NULL) {
5129                         sctp_m_freem(aack->data);
5130                 }
5131                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5132         }
5133         /* clean up auth stuff */
5134         if (asoc->local_hmacs)
5135                 sctp_free_hmaclist(asoc->local_hmacs);
5136         if (asoc->peer_hmacs)
5137                 sctp_free_hmaclist(asoc->peer_hmacs);
5138
5139         if (asoc->local_auth_chunks)
5140                 sctp_free_chunklist(asoc->local_auth_chunks);
5141         if (asoc->peer_auth_chunks)
5142                 sctp_free_chunklist(asoc->peer_auth_chunks);
5143
5144         sctp_free_authinfo(&asoc->authinfo);
5145
5146         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5147                 LIST_REMOVE(shared_key, next);
5148                 sctp_free_sharedkey(shared_key);
5149                 /* sa_ignore FREED_MEMORY */
5150         }
5151
5152         /* Insert new items here :> */
5153
5154         /* Get rid of LOCK */
5155         SCTP_TCB_UNLOCK(stcb);
5156         SCTP_TCB_LOCK_DESTROY(stcb);
5157         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5158         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5159                 SCTP_INP_INFO_WUNLOCK();
5160                 SCTP_INP_RLOCK(inp);
5161         }
5162 #ifdef SCTP_TRACK_FREED_ASOCS
5163         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5164                 /* now clean up the tasoc itself */
5165                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5166                 SCTP_DECR_ASOC_COUNT();
5167         } else {
5168                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5169         }
5170 #else
5171         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5172         SCTP_DECR_ASOC_COUNT();
5173 #endif
5174         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5175                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5176                         /*
5177                          * If its NOT the inp_free calling us AND sctp_close
5178                          * as been called, we call back...
5179                          */
5180                         SCTP_INP_RUNLOCK(inp);
5181                         /*
5182                          * This will start the kill timer (if we are the
5183                          * last one) since we hold an increment yet. But
5184                          * this is the only safe way to do this since
5185                          * otherwise if the socket closes at the same time
5186                          * we are here we might collide in the cleanup.
5187                          */
5188                         sctp_inpcb_free(inp,
5189                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5190                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5191                         SCTP_INP_DECR_REF(inp);
5192                 } else {
5193                         /* The socket is still open. */
5194                         SCTP_INP_DECR_REF(inp);
5195                         SCTP_INP_RUNLOCK(inp);
5196                 }
5197         }
5198         /* destroyed the asoc */
5199 #ifdef SCTP_LOG_CLOSING
5200         sctp_log_closing(inp, NULL, 11);
5201 #endif
5202         return (1);
5203 }
5204
5205
5206
5207 /*
5208  * determine if a destination is "reachable" based upon the addresses bound
5209  * to the current endpoint (e.g. only v4 or v6 currently bound)
5210  */
5211 /*
5212  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5213  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5214  * types bound as its endpoint
5215  */
5216 int
5217 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5218 {
5219         struct sctp_inpcb *inp;
5220         int answer;
5221
5222         /*
5223          * No locks here, the TCB, in all cases is already locked and an
5224          * assoc is up. There is either a INP lock by the caller applied (in
5225          * asconf case when deleting an address) or NOT in the HB case,
5226          * however if HB then the INP increment is up and the INP will not
5227          * be removed (on top of the fact that we have a TCB lock). So we
5228          * only want to read the sctp_flags, which is either bound-all or
5229          * not.. no protection needed since once an assoc is up you can't be
5230          * changing your binding.
5231          */
5232         inp = stcb->sctp_ep;
5233         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5234                 /* if bound all, destination is not restricted */
5235                 /*
5236                  * RRS: Question during lock work: Is this correct? If you
5237                  * are bound-all you still might need to obey the V4--V6
5238                  * flags??? IMO this bound-all stuff needs to be removed!
5239                  */
5240                 return (1);
5241         }
5242         /* NOTE: all "scope" checks are done when local addresses are added */
5243         switch (destaddr->sa_family) {
5244 #ifdef INET6
5245         case AF_INET6:
5246                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5247                 break;
5248 #endif
5249 #ifdef INET
5250         case AF_INET:
5251                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5252                 break;
5253 #endif
5254         default:
5255                 /* invalid family, so it's unreachable */
5256                 answer = 0;
5257                 break;
5258         }
5259         return (answer);
5260 }
5261
5262 /*
5263  * update the inp_vflags on an endpoint
5264  */
5265 static void
5266 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5267 {
5268         struct sctp_laddr *laddr;
5269
5270         /* first clear the flag */
5271         inp->ip_inp.inp.inp_vflag = 0;
5272         /* set the flag based on addresses on the ep list */
5273         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5274                 if (laddr->ifa == NULL) {
5275                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5276                             __func__);
5277                         continue;
5278                 }
5279
5280                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5281                         continue;
5282                 }
5283                 switch (laddr->ifa->address.sa.sa_family) {
5284 #ifdef INET6
5285                 case AF_INET6:
5286                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5287                         break;
5288 #endif
5289 #ifdef INET
5290                 case AF_INET:
5291                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5292                         break;
5293 #endif
5294                 default:
5295                         break;
5296                 }
5297         }
5298 }
5299
5300 /*
5301  * Add the address to the endpoint local address list There is nothing to be
5302  * done if we are bound to all addresses
5303  */
5304 void
5305 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5306 {
5307         struct sctp_laddr *laddr;
5308         struct sctp_tcb *stcb;
5309         int fnd, error = 0;
5310
5311         fnd = 0;
5312
5313         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5314                 /* You are already bound to all. You have it already */
5315                 return;
5316         }
5317 #ifdef INET6
5318         if (ifa->address.sa.sa_family == AF_INET6) {
5319                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5320                         /* Can't bind a non-useable addr. */
5321                         return;
5322                 }
5323         }
5324 #endif
5325         /* first, is it already present? */
5326         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5327                 if (laddr->ifa == ifa) {
5328                         fnd = 1;
5329                         break;
5330                 }
5331         }
5332
5333         if (fnd == 0) {
5334                 /* Not in the ep list */
5335                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5336                 if (error != 0)
5337                         return;
5338                 inp->laddr_count++;
5339                 /* update inp_vflag flags */
5340                 switch (ifa->address.sa.sa_family) {
5341 #ifdef INET6
5342                 case AF_INET6:
5343                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5344                         break;
5345 #endif
5346 #ifdef INET
5347                 case AF_INET:
5348                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5349                         break;
5350 #endif
5351                 default:
5352                         break;
5353                 }
5354                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5355                         sctp_add_local_addr_restricted(stcb, ifa);
5356                 }
5357         }
5358         return;
5359 }
5360
5361
5362 /*
5363  * select a new (hopefully reachable) destination net (should only be used
5364  * when we deleted an ep addr that is the only usable source address to reach
5365  * the destination net)
5366  */
5367 static void
5368 sctp_select_primary_destination(struct sctp_tcb *stcb)
5369 {
5370         struct sctp_nets *net;
5371
5372         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5373                 /* for now, we'll just pick the first reachable one we find */
5374                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5375                         continue;
5376                 if (sctp_destination_is_reachable(stcb,
5377                     (struct sockaddr *)&net->ro._l_addr)) {
5378                         /* found a reachable destination */
5379                         stcb->asoc.primary_destination = net;
5380                 }
5381         }
5382         /* I can't there from here! ...we're gonna die shortly... */
5383 }
5384
5385
5386 /*
5387  * Delete the address from the endpoint local address list. There is nothing
5388  * to be done if we are bound to all addresses
5389  */
5390 void
5391 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5392 {
5393         struct sctp_laddr *laddr;
5394         int fnd;
5395
5396         fnd = 0;
5397         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5398                 /* You are already bound to all. You have it already */
5399                 return;
5400         }
5401         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5402                 if (laddr->ifa == ifa) {
5403                         fnd = 1;
5404                         break;
5405                 }
5406         }
5407         if (fnd && (inp->laddr_count < 2)) {
5408                 /* can't delete unless there are at LEAST 2 addresses */
5409                 return;
5410         }
5411         if (fnd) {
5412                 /*
5413                  * clean up any use of this address go through our
5414                  * associations and clear any last_used_address that match
5415                  * this one for each assoc, see if a new primary_destination
5416                  * is needed
5417                  */
5418                 struct sctp_tcb *stcb;
5419
5420                 /* clean up "next_addr_touse" */
5421                 if (inp->next_addr_touse == laddr)
5422                         /* delete this address */
5423                         inp->next_addr_touse = NULL;
5424
5425                 /* clean up "last_used_address" */
5426                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5427                         struct sctp_nets *net;
5428
5429                         SCTP_TCB_LOCK(stcb);
5430                         if (stcb->asoc.last_used_address == laddr)
5431                                 /* delete this address */
5432                                 stcb->asoc.last_used_address = NULL;
5433                         /*
5434                          * Now spin through all the nets and purge any ref
5435                          * to laddr
5436                          */
5437                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5438                                 if (net->ro._s_addr == laddr->ifa) {
5439                                         /* Yep, purge src address selected */
5440                                         sctp_rtentry_t *rt;
5441
5442                                         /* delete this address if cached */
5443                                         rt = net->ro.ro_rt;
5444                                         if (rt != NULL) {
5445                                                 RTFREE(rt);
5446                                                 net->ro.ro_rt = NULL;
5447                                         }
5448                                         sctp_free_ifa(net->ro._s_addr);
5449                                         net->ro._s_addr = NULL;
5450                                         net->src_addr_selected = 0;
5451                                 }
5452                         }
5453                         SCTP_TCB_UNLOCK(stcb);
5454                 }               /* for each tcb */
5455                 /* remove it from the ep list */
5456                 sctp_remove_laddr(laddr);
5457                 inp->laddr_count--;
5458                 /* update inp_vflag flags */
5459                 sctp_update_ep_vflag(inp);
5460         }
5461         return;
5462 }
5463
5464 /*
5465  * Add the address to the TCB local address restricted list.
5466  * This is a "pending" address list (eg. addresses waiting for an
5467  * ASCONF-ACK response) and cannot be used as a valid source address.
5468  */
5469 void
5470 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5471 {
5472         struct sctp_laddr *laddr;
5473         struct sctpladdr *list;
5474
5475         /*
5476          * Assumes TCB is locked.. and possibly the INP. May need to
5477          * confirm/fix that if we need it and is not the case.
5478          */
5479         list = &stcb->asoc.sctp_restricted_addrs;
5480
5481 #ifdef INET6
5482         if (ifa->address.sa.sa_family == AF_INET6) {
5483                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5484                         /* Can't bind a non-existent addr. */
5485                         return;
5486                 }
5487         }
5488 #endif
5489         /* does the address already exist? */
5490         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5491                 if (laddr->ifa == ifa) {
5492                         return;
5493                 }
5494         }
5495
5496         /* add to the list */
5497         (void)sctp_insert_laddr(list, ifa, 0);
5498         return;
5499 }
5500
5501 /*
5502  * Remove a local address from the TCB local address restricted list
5503  */
5504 void
5505 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5506 {
5507         struct sctp_inpcb *inp;
5508         struct sctp_laddr *laddr;
5509
5510         /*
5511          * This is called by asconf work. It is assumed that a) The TCB is
5512          * locked and b) The INP is locked. This is true in as much as I can
5513          * trace through the entry asconf code where I did these locks.
5514          * Again, the ASCONF code is a bit different in that it does lock
5515          * the INP during its work often times. This must be since we don't
5516          * want other proc's looking up things while what they are looking
5517          * up is changing :-D
5518          */
5519
5520         inp = stcb->sctp_ep;
5521         /* if subset bound and don't allow ASCONF's, can't delete last */
5522         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5523             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5524                 if (stcb->sctp_ep->laddr_count < 2) {
5525                         /* can't delete last address */
5526                         return;
5527                 }
5528         }
5529         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5530                 /* remove the address if it exists */
5531                 if (laddr->ifa == NULL)
5532                         continue;
5533                 if (laddr->ifa == ifa) {
5534                         sctp_remove_laddr(laddr);
5535                         return;
5536                 }
5537         }
5538
5539         /* address not found! */
5540         return;
5541 }
5542
5543 /* sysctl */
5544 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5545 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5546
5547 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5548 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5549 int *sctp_cpuarry = NULL;
5550
5551 void
5552 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5553 {
5554         /* Queue a packet to a processor for the specified core */
5555         struct sctp_mcore_queue *qent;
5556         struct sctp_mcore_ctrl *wkq;
5557         int need_wake = 0;
5558
5559         if (sctp_mcore_workers == NULL) {
5560                 /* Something went way bad during setup */
5561                 sctp_input_with_port(m, off, 0);
5562                 return;
5563         }
5564         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5565             (sizeof(struct sctp_mcore_queue)),
5566             SCTP_M_MCORE);
5567         if (qent == NULL) {
5568                 /* This is trouble  */
5569                 sctp_input_with_port(m, off, 0);
5570                 return;
5571         }
5572         qent->vn = curvnet;
5573         qent->m = m;
5574         qent->off = off;
5575         qent->v6 = 0;
5576         wkq = &sctp_mcore_workers[cpu_to_use];
5577         SCTP_MCORE_QLOCK(wkq);
5578
5579         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5580         if (wkq->running == 0) {
5581                 need_wake = 1;
5582         }
5583         SCTP_MCORE_QUNLOCK(wkq);
5584         if (need_wake) {
5585                 wakeup(&wkq->running);
5586         }
5587 }
5588
5589 static void
5590 sctp_mcore_thread(void *arg)
5591 {
5592
5593         struct sctp_mcore_ctrl *wkq;
5594         struct sctp_mcore_queue *qent;
5595
5596         wkq = (struct sctp_mcore_ctrl *)arg;
5597         struct mbuf *m;
5598         int off, v6;
5599
5600         /* Wait for first tickle */
5601         SCTP_MCORE_LOCK(wkq);
5602         wkq->running = 0;
5603         msleep(&wkq->running,
5604             &wkq->core_mtx,
5605             0, "wait for pkt", 0);
5606         SCTP_MCORE_UNLOCK(wkq);
5607
5608         /* Bind to our cpu */
5609         thread_lock(curthread);
5610         sched_bind(curthread, wkq->cpuid);
5611         thread_unlock(curthread);
5612
5613         /* Now lets start working */
5614         SCTP_MCORE_LOCK(wkq);
5615         /* Now grab lock and go */
5616         for (;;) {
5617                 SCTP_MCORE_QLOCK(wkq);
5618 skip_sleep:
5619                 wkq->running = 1;
5620                 qent = TAILQ_FIRST(&wkq->que);
5621                 if (qent) {
5622                         TAILQ_REMOVE(&wkq->que, qent, next);
5623                         SCTP_MCORE_QUNLOCK(wkq);
5624                         CURVNET_SET(qent->vn);
5625                         m = qent->m;
5626                         off = qent->off;
5627                         v6 = qent->v6;
5628                         SCTP_FREE(qent, SCTP_M_MCORE);
5629                         if (v6 == 0) {
5630                                 sctp_input_with_port(m, off, 0);
5631                         } else {
5632                                 SCTP_PRINTF("V6 not yet supported\n");
5633                                 sctp_m_freem(m);
5634                         }
5635                         CURVNET_RESTORE();
5636                         SCTP_MCORE_QLOCK(wkq);
5637                 }
5638                 wkq->running = 0;
5639                 if (!TAILQ_EMPTY(&wkq->que)) {
5640                         goto skip_sleep;
5641                 }
5642                 SCTP_MCORE_QUNLOCK(wkq);
5643                 msleep(&wkq->running,
5644                     &wkq->core_mtx,
5645                     0, "wait for pkt", 0);
5646         }
5647 }
5648
5649 static void
5650 sctp_startup_mcore_threads(void)
5651 {
5652         int i, cpu;
5653
5654         if (mp_ncpus == 1)
5655                 return;
5656
5657         if (sctp_mcore_workers != NULL) {
5658                 /*
5659                  * Already been here in some previous vnet?
5660                  */
5661                 return;
5662         }
5663         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5664             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5665             SCTP_M_MCORE);
5666         if (sctp_mcore_workers == NULL) {
5667                 /* TSNH I hope */
5668                 return;
5669         }
5670         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5671             sizeof(struct sctp_mcore_ctrl)));
5672         /* Init the structures */
5673         for (i = 0; i <= mp_maxid; i++) {
5674                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5675                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5676                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5677                 sctp_mcore_workers[i].cpuid = i;
5678         }
5679         if (sctp_cpuarry == NULL) {
5680                 SCTP_MALLOC(sctp_cpuarry, int *,
5681                     (mp_ncpus * sizeof(int)),
5682                     SCTP_M_MCORE);
5683                 i = 0;
5684                 CPU_FOREACH(cpu) {
5685                         sctp_cpuarry[i] = cpu;
5686                         i++;
5687                 }
5688         }
5689         /* Now start them all */
5690         CPU_FOREACH(cpu) {
5691                 (void)kproc_create(sctp_mcore_thread,
5692                     (void *)&sctp_mcore_workers[cpu],
5693                     &sctp_mcore_workers[cpu].thread_proc,
5694                     RFPROC,
5695                     SCTP_KTHREAD_PAGES,
5696                     SCTP_MCORE_NAME);
5697         }
5698 }
5699 #endif
5700
5701 void
5702 sctp_pcb_init(void)
5703 {
5704         /*
5705          * SCTP initialization for the PCB structures should be called by
5706          * the sctp_init() function.
5707          */
5708         int i;
5709         struct timeval tv;
5710
5711         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5712                 /* error I was called twice */
5713                 return;
5714         }
5715         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5716
5717 #if defined(SCTP_LOCAL_TRACE_BUF)
5718         memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log));
5719 #endif
5720 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5721         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5722             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5723             SCTP_M_MCORE);
5724 #endif
5725         (void)SCTP_GETTIME_TIMEVAL(&tv);
5726 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5727         memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1));
5728         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
5729         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
5730 #else
5731         memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat));
5732         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
5733         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
5734 #endif
5735         /* init the empty list of (All) Endpoints */
5736         LIST_INIT(&SCTP_BASE_INFO(listhead));
5737
5738
5739         /* init the hash table of endpoints */
5740         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5741         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5742         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5743         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5744             &SCTP_BASE_INFO(hashasocmark));
5745         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5746             &SCTP_BASE_INFO(hashmark));
5747         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5748             &SCTP_BASE_INFO(hashtcpmark));
5749         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5750
5751
5752         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5753             &SCTP_BASE_INFO(hashvrfmark));
5754
5755         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5756             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5757         /* init the zones */
5758         /*
5759          * FIX ME: Should check for NULL returns, but if it does fail we are
5760          * doomed to panic anyways... add later maybe.
5761          */
5762         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5763             sizeof(struct sctp_inpcb), maxsockets);
5764
5765         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5766             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5767
5768         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5769             sizeof(struct sctp_laddr),
5770             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5771
5772         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5773             sizeof(struct sctp_nets),
5774             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5775
5776         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5777             sizeof(struct sctp_tmit_chunk),
5778             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5779
5780         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5781             sizeof(struct sctp_queued_to_read),
5782             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5783
5784         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5785             sizeof(struct sctp_stream_queue_pending),
5786             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5787
5788         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5789             sizeof(struct sctp_asconf),
5790             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5791
5792         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5793             sizeof(struct sctp_asconf_ack),
5794             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5795
5796
5797         /* Master Lock INIT for info structure */
5798         SCTP_INP_INFO_LOCK_INIT();
5799         SCTP_STATLOG_INIT_LOCK();
5800
5801         SCTP_IPI_COUNT_INIT();
5802         SCTP_IPI_ADDR_INIT();
5803 #ifdef SCTP_PACKET_LOGGING
5804         SCTP_IP_PKTLOG_INIT();
5805 #endif
5806         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5807
5808         SCTP_WQ_ADDR_INIT();
5809         /* not sure if we need all the counts */
5810         SCTP_BASE_INFO(ipi_count_ep) = 0;
5811         /* assoc/tcb zone info */
5812         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5813         /* local addrlist zone info */
5814         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5815         /* remote addrlist zone info */
5816         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5817         /* chunk info */
5818         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5819
5820         /* socket queue zone info */
5821         SCTP_BASE_INFO(ipi_count_readq) = 0;
5822
5823         /* stream out queue cont */
5824         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5825
5826         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5827         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5828
5829         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5830
5831         /* Init the TIMEWAIT list */
5832         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5833                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5834         }
5835         sctp_startup_iterator();
5836
5837 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5838         sctp_startup_mcore_threads();
5839 #endif
5840
5841         /*
5842          * INIT the default VRF which for BSD is the only one, other O/S's
5843          * may have more. But initially they must start with one and then
5844          * add the VRF's as addresses are added.
5845          */
5846         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5847 }
5848
5849 /*
5850  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5851  */
5852 void
5853 sctp_pcb_finish(void)
5854 {
5855         struct sctp_vrflist *vrf_bucket;
5856         struct sctp_vrf *vrf, *nvrf;
5857         struct sctp_ifn *ifn, *nifn;
5858         struct sctp_ifa *ifa, *nifa;
5859         struct sctpvtaghead *chain;
5860         struct sctp_tagblock *twait_block, *prev_twait_block;
5861         struct sctp_laddr *wi, *nwi;
5862         int i;
5863         struct sctp_iterator *it, *nit;
5864
5865         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5866                 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5867                 return;
5868         }
5869         SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5870         /*
5871          * In FreeBSD the iterator thread never exits but we do clean up.
5872          * The only way FreeBSD reaches here is if we have VRF's but we
5873          * still add the ifdef to make it compile on old versions.
5874          */
5875 retry:
5876         SCTP_IPI_ITERATOR_WQ_LOCK();
5877         /*
5878          * sctp_iterator_worker() might be working on an it entry without
5879          * holding the lock.  We won't find it on the list either and
5880          * continue and free/destroy it.  While holding the lock, spin, to
5881          * avoid the race condition as sctp_iterator_worker() will have to
5882          * wait to re-acquire the lock.
5883          */
5884         if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5885                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5886                 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5887                     "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5888                 DELAY(10);
5889                 goto retry;
5890         }
5891         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5892                 if (it->vn != curvnet) {
5893                         continue;
5894                 }
5895                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5896                 if (it->function_atend != NULL) {
5897                         (*it->function_atend) (it->pointer, it->val);
5898                 }
5899                 SCTP_FREE(it, SCTP_M_ITER);
5900         }
5901         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5902         SCTP_ITERATOR_LOCK();
5903         if ((sctp_it_ctl.cur_it) &&
5904             (sctp_it_ctl.cur_it->vn == curvnet)) {
5905                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5906         }
5907         SCTP_ITERATOR_UNLOCK();
5908         SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5909         SCTP_WQ_ADDR_LOCK();
5910         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5911                 LIST_REMOVE(wi, sctp_nxt_addr);
5912                 SCTP_DECR_LADDR_COUNT();
5913                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5914                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
5915                 }
5916                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5917         }
5918         SCTP_WQ_ADDR_UNLOCK();
5919
5920         /*
5921          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5922          * destroyed first).
5923          */
5924         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5925         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5926                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5927                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5928                                 /* free the ifa */
5929                                 LIST_REMOVE(ifa, next_bucket);
5930                                 LIST_REMOVE(ifa, next_ifa);
5931                                 SCTP_FREE(ifa, SCTP_M_IFA);
5932                         }
5933                         /* free the ifn */
5934                         LIST_REMOVE(ifn, next_bucket);
5935                         LIST_REMOVE(ifn, next_ifn);
5936                         SCTP_FREE(ifn, SCTP_M_IFN);
5937                 }
5938                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5939                 /* free the vrf */
5940                 LIST_REMOVE(vrf, next_vrf);
5941                 SCTP_FREE(vrf, SCTP_M_VRF);
5942         }
5943         /* free the vrf hashes */
5944         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5945         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5946
5947         /*
5948          * free the TIMEWAIT list elements malloc'd in the function
5949          * sctp_add_vtag_to_timewait()...
5950          */
5951         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5952                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5953                 if (!LIST_EMPTY(chain)) {
5954                         prev_twait_block = NULL;
5955                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5956                                 if (prev_twait_block) {
5957                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5958                                 }
5959                                 prev_twait_block = twait_block;
5960                         }
5961                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5962                 }
5963         }
5964
5965         /* free the locks and mutexes */
5966 #ifdef SCTP_PACKET_LOGGING
5967         SCTP_IP_PKTLOG_DESTROY();
5968 #endif
5969         SCTP_IPI_ADDR_DESTROY();
5970         SCTP_STATLOG_DESTROY();
5971         SCTP_INP_INFO_LOCK_DESTROY();
5972
5973         SCTP_WQ_ADDR_DESTROY();
5974
5975         /* Get rid of other stuff too. */
5976         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5977                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5978         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5979                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5980         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5981                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5982
5983         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5984         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5985         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5986         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5987         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5988         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5989         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5990         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5991         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5992 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5993         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
5994 #endif
5995 }
5996
5997
5998 int
5999 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6000     int offset, int limit,
6001     struct sockaddr *src, struct sockaddr *dst,
6002     struct sockaddr *altsa, uint16_t port)
6003 {
6004         /*
6005          * grub through the INIT pulling addresses and loading them to the
6006          * nets structure in the asoc. The from address in the mbuf should
6007          * also be loaded (if it is not already). This routine can be called
6008          * with either INIT or INIT-ACK's as long as the m points to the IP
6009          * packet and the offset points to the beginning of the parameters.
6010          */
6011         struct sctp_inpcb *inp;
6012         struct sctp_nets *net, *nnet, *net_tmp;
6013         struct sctp_paramhdr *phdr, param_buf;
6014         struct sctp_tcb *stcb_tmp;
6015         uint16_t ptype, plen;
6016         struct sockaddr *sa;
6017         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6018         struct sctp_auth_random *p_random = NULL;
6019         uint16_t random_len = 0;
6020         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6021         struct sctp_auth_hmac_algo *hmacs = NULL;
6022         uint16_t hmacs_len = 0;
6023         uint8_t saw_asconf = 0;
6024         uint8_t saw_asconf_ack = 0;
6025         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6026         struct sctp_auth_chunk_list *chunks = NULL;
6027         uint16_t num_chunks = 0;
6028         sctp_key_t *new_key;
6029         uint32_t keylen;
6030         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6031         uint8_t peer_supports_ecn;
6032         uint8_t peer_supports_prsctp;
6033         uint8_t peer_supports_auth;
6034         uint8_t peer_supports_asconf;
6035         uint8_t peer_supports_asconf_ack;
6036         uint8_t peer_supports_reconfig;
6037         uint8_t peer_supports_nrsack;
6038         uint8_t peer_supports_pktdrop;
6039         uint8_t peer_supports_idata;
6040 #ifdef INET
6041         struct sockaddr_in sin;
6042 #endif
6043 #ifdef INET6
6044         struct sockaddr_in6 sin6;
6045 #endif
6046
6047         /* First get the destination address setup too. */
6048 #ifdef INET
6049         memset(&sin, 0, sizeof(sin));
6050         sin.sin_family = AF_INET;
6051         sin.sin_len = sizeof(sin);
6052         sin.sin_port = stcb->rport;
6053 #endif
6054 #ifdef INET6
6055         memset(&sin6, 0, sizeof(sin6));
6056         sin6.sin6_family = AF_INET6;
6057         sin6.sin6_len = sizeof(struct sockaddr_in6);
6058         sin6.sin6_port = stcb->rport;
6059 #endif
6060         if (altsa) {
6061                 sa = altsa;
6062         } else {
6063                 sa = src;
6064         }
6065         peer_supports_idata = 0;
6066         peer_supports_ecn = 0;
6067         peer_supports_prsctp = 0;
6068         peer_supports_auth = 0;
6069         peer_supports_asconf = 0;
6070         peer_supports_reconfig = 0;
6071         peer_supports_nrsack = 0;
6072         peer_supports_pktdrop = 0;
6073         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6074                 /* mark all addresses that we have currently on the list */
6075                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6076         }
6077         /* does the source address already exist? if so skip it */
6078         inp = stcb->sctp_ep;
6079         atomic_add_int(&stcb->asoc.refcnt, 1);
6080         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6081         atomic_add_int(&stcb->asoc.refcnt, -1);
6082
6083         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6084                 /* we must add the source address */
6085                 /* no scope set here since we have a tcb already. */
6086                 switch (sa->sa_family) {
6087 #ifdef INET
6088                 case AF_INET:
6089                         if (stcb->asoc.scope.ipv4_addr_legal) {
6090                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6091                                         return (-1);
6092                                 }
6093                         }
6094                         break;
6095 #endif
6096 #ifdef INET6
6097                 case AF_INET6:
6098                         if (stcb->asoc.scope.ipv6_addr_legal) {
6099                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6100                                         return (-2);
6101                                 }
6102                         }
6103                         break;
6104 #endif
6105                 default:
6106                         break;
6107                 }
6108         } else {
6109                 if (net_tmp != NULL && stcb_tmp == stcb) {
6110                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6111                 } else if (stcb_tmp != stcb) {
6112                         /* It belongs to another association? */
6113                         if (stcb_tmp)
6114                                 SCTP_TCB_UNLOCK(stcb_tmp);
6115                         return (-3);
6116                 }
6117         }
6118         if (stcb->asoc.state == 0) {
6119                 /* the assoc was freed? */
6120                 return (-4);
6121         }
6122         /* now we must go through each of the params. */
6123         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
6124         while (phdr) {
6125                 ptype = ntohs(phdr->param_type);
6126                 plen = ntohs(phdr->param_length);
6127                 /*
6128                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6129                  * (uint32_t)ptype, (int)plen);
6130                  */
6131                 if (offset + plen > limit) {
6132                         break;
6133                 }
6134                 if (plen < sizeof(struct sctp_paramhdr)) {
6135                         break;
6136                 }
6137 #ifdef INET
6138                 if (ptype == SCTP_IPV4_ADDRESS) {
6139                         if (stcb->asoc.scope.ipv4_addr_legal) {
6140                                 struct sctp_ipv4addr_param *p4, p4_buf;
6141
6142                                 /* ok get the v4 address and check/add */
6143                                 phdr = sctp_get_next_param(m, offset,
6144                                     (struct sctp_paramhdr *)&p4_buf,
6145                                     sizeof(p4_buf));
6146                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6147                                     phdr == NULL) {
6148                                         return (-5);
6149                                 }
6150                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6151                                 sin.sin_addr.s_addr = p4->addr;
6152                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6153                                         /* Skip multi-cast addresses */
6154                                         goto next_param;
6155                                 }
6156                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6157                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6158                                         goto next_param;
6159                                 }
6160                                 sa = (struct sockaddr *)&sin;
6161                                 inp = stcb->sctp_ep;
6162                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6163                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6164                                     dst, stcb);
6165                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6166
6167                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6168                                     inp == NULL) {
6169                                         /* we must add the source address */
6170                                         /*
6171                                          * no scope set since we have a tcb
6172                                          * already
6173                                          */
6174
6175                                         /*
6176                                          * we must validate the state again
6177                                          * here
6178                                          */
6179                         add_it_now:
6180                                         if (stcb->asoc.state == 0) {
6181                                                 /* the assoc was freed? */
6182                                                 return (-7);
6183                                         }
6184                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6185                                                 return (-8);
6186                                         }
6187                                 } else if (stcb_tmp == stcb) {
6188                                         if (stcb->asoc.state == 0) {
6189                                                 /* the assoc was freed? */
6190                                                 return (-10);
6191                                         }
6192                                         if (net != NULL) {
6193                                                 /* clear flag */
6194                                                 net->dest_state &=
6195                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6196                                         }
6197                                 } else {
6198                                         /*
6199                                          * strange, address is in another
6200                                          * assoc? straighten out locks.
6201                                          */
6202                                         if (stcb_tmp) {
6203                                                 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6204                                                         struct mbuf *op_err;
6205                                                         char msg[SCTP_DIAG_INFO_LEN];
6206
6207                                                         /*
6208                                                          * in setup state we
6209                                                          * abort this guy
6210                                                          */
6211                                                         SCTP_SNPRINTF(msg, sizeof(msg),
6212                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6213                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6214                                                             msg);
6215                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6216                                                             stcb_tmp, op_err,
6217                                                             SCTP_SO_NOT_LOCKED);
6218                                                         goto add_it_now;
6219                                                 }
6220                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6221                                         }
6222
6223                                         if (stcb->asoc.state == 0) {
6224                                                 /* the assoc was freed? */
6225                                                 return (-12);
6226                                         }
6227                                         return (-13);
6228                                 }
6229                         }
6230                 } else
6231 #endif
6232 #ifdef INET6
6233                 if (ptype == SCTP_IPV6_ADDRESS) {
6234                         if (stcb->asoc.scope.ipv6_addr_legal) {
6235                                 /* ok get the v6 address and check/add */
6236                                 struct sctp_ipv6addr_param *p6, p6_buf;
6237
6238                                 phdr = sctp_get_next_param(m, offset,
6239                                     (struct sctp_paramhdr *)&p6_buf,
6240                                     sizeof(p6_buf));
6241                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6242                                     phdr == NULL) {
6243                                         return (-14);
6244                                 }
6245                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6246                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6247                                     sizeof(p6->addr));
6248                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6249                                         /* Skip multi-cast addresses */
6250                                         goto next_param;
6251                                 }
6252                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6253                                         /*
6254                                          * Link local make no sense without
6255                                          * scope
6256                                          */
6257                                         goto next_param;
6258                                 }
6259                                 sa = (struct sockaddr *)&sin6;
6260                                 inp = stcb->sctp_ep;
6261                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6262                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6263                                     dst, stcb);
6264                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6265                                 if (stcb_tmp == NULL &&
6266                                     (inp == stcb->sctp_ep || inp == NULL)) {
6267                                         /*
6268                                          * we must validate the state again
6269                                          * here
6270                                          */
6271                         add_it_now6:
6272                                         if (stcb->asoc.state == 0) {
6273                                                 /* the assoc was freed? */
6274                                                 return (-16);
6275                                         }
6276                                         /*
6277                                          * we must add the address, no scope
6278                                          * set
6279                                          */
6280                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6281                                                 return (-17);
6282                                         }
6283                                 } else if (stcb_tmp == stcb) {
6284                                         /*
6285                                          * we must validate the state again
6286                                          * here
6287                                          */
6288                                         if (stcb->asoc.state == 0) {
6289                                                 /* the assoc was freed? */
6290                                                 return (-19);
6291                                         }
6292                                         if (net != NULL) {
6293                                                 /* clear flag */
6294                                                 net->dest_state &=
6295                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6296                                         }
6297                                 } else {
6298                                         /*
6299                                          * strange, address is in another
6300                                          * assoc? straighten out locks.
6301                                          */
6302                                         if (stcb_tmp) {
6303                                                 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6304                                                         struct mbuf *op_err;
6305                                                         char msg[SCTP_DIAG_INFO_LEN];
6306
6307                                                         /*
6308                                                          * in setup state we
6309                                                          * abort this guy
6310                                                          */
6311                                                         SCTP_SNPRINTF(msg, sizeof(msg),
6312                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6313                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6314                                                             msg);
6315                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6316                                                             stcb_tmp, op_err,
6317                                                             SCTP_SO_NOT_LOCKED);
6318                                                         goto add_it_now6;
6319                                                 }
6320                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6321                                         }
6322                                         if (stcb->asoc.state == 0) {
6323                                                 /* the assoc was freed? */
6324                                                 return (-21);
6325                                         }
6326                                         return (-22);
6327                                 }
6328                         }
6329                 } else
6330 #endif
6331                 if (ptype == SCTP_ECN_CAPABLE) {
6332                         peer_supports_ecn = 1;
6333                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6334                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6335                                 struct sctp_adaptation_layer_indication ai,
6336                                                                 *aip;
6337
6338                                 phdr = sctp_get_next_param(m, offset,
6339                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6340                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6341                                 if (aip) {
6342                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6343                                         stcb->asoc.adaptation_needed = 1;
6344                                 }
6345                         }
6346                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6347                         struct sctp_asconf_addr_param lstore, *fee;
6348                         int lptype;
6349                         struct sockaddr *lsa = NULL;
6350 #ifdef INET
6351                         struct sctp_asconf_addrv4_param *fii;
6352 #endif
6353
6354                         if (stcb->asoc.asconf_supported == 0) {
6355                                 return (-100);
6356                         }
6357                         if (plen > sizeof(lstore)) {
6358                                 return (-23);
6359                         }
6360                         if (plen < sizeof(struct sctp_asconf_addrv4_param)) {
6361                                 return (-101);
6362                         }
6363                         phdr = sctp_get_next_param(m, offset,
6364                             (struct sctp_paramhdr *)&lstore,
6365                             plen);
6366                         if (phdr == NULL) {
6367                                 return (-24);
6368                         }
6369                         fee = (struct sctp_asconf_addr_param *)phdr;
6370                         lptype = ntohs(fee->addrp.ph.param_type);
6371                         switch (lptype) {
6372 #ifdef INET
6373                         case SCTP_IPV4_ADDRESS:
6374                                 if (plen !=
6375                                     sizeof(struct sctp_asconf_addrv4_param)) {
6376                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6377                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6378                                             plen);
6379                                 } else {
6380                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6381                                         sin.sin_addr.s_addr = fii->addrp.addr;
6382                                         lsa = (struct sockaddr *)&sin;
6383                                 }
6384                                 break;
6385 #endif
6386 #ifdef INET6
6387                         case SCTP_IPV6_ADDRESS:
6388                                 if (plen !=
6389                                     sizeof(struct sctp_asconf_addr_param)) {
6390                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6391                                             (int)sizeof(struct sctp_asconf_addr_param),
6392                                             plen);
6393                                 } else {
6394                                         memcpy(sin6.sin6_addr.s6_addr,
6395                                             fee->addrp.addr,
6396                                             sizeof(fee->addrp.addr));
6397                                         lsa = (struct sockaddr *)&sin6;
6398                                 }
6399                                 break;
6400 #endif
6401                         default:
6402                                 break;
6403                         }
6404                         if (lsa) {
6405                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6406                         }
6407                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6408                         stcb->asoc.peer_supports_nat = 1;
6409                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6410                         /* Peer supports pr-sctp */
6411                         peer_supports_prsctp = 1;
6412                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6413                         /* A supported extension chunk */
6414                         struct sctp_supported_chunk_types_param *pr_supported;
6415                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6416                         int num_ent, i;
6417
6418                         if (plen > sizeof(local_store)) {
6419                                 return (-35);
6420                         }
6421                         phdr = sctp_get_next_param(m, offset,
6422                             (struct sctp_paramhdr *)&local_store, plen);
6423                         if (phdr == NULL) {
6424                                 return (-25);
6425                         }
6426                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6427                         num_ent = plen - sizeof(struct sctp_paramhdr);
6428                         for (i = 0; i < num_ent; i++) {
6429                                 switch (pr_supported->chunk_types[i]) {
6430                                 case SCTP_ASCONF:
6431                                         peer_supports_asconf = 1;
6432                                         break;
6433                                 case SCTP_ASCONF_ACK:
6434                                         peer_supports_asconf_ack = 1;
6435                                         break;
6436                                 case SCTP_FORWARD_CUM_TSN:
6437                                         peer_supports_prsctp = 1;
6438                                         break;
6439                                 case SCTP_PACKET_DROPPED:
6440                                         peer_supports_pktdrop = 1;
6441                                         break;
6442                                 case SCTP_NR_SELECTIVE_ACK:
6443                                         peer_supports_nrsack = 1;
6444                                         break;
6445                                 case SCTP_STREAM_RESET:
6446                                         peer_supports_reconfig = 1;
6447                                         break;
6448                                 case SCTP_AUTHENTICATION:
6449                                         peer_supports_auth = 1;
6450                                         break;
6451                                 case SCTP_IDATA:
6452                                         peer_supports_idata = 1;
6453                                         break;
6454                                 default:
6455                                         /* one I have not learned yet */
6456                                         break;
6457
6458                                 }
6459                         }
6460                 } else if (ptype == SCTP_RANDOM) {
6461                         if (plen > sizeof(random_store))
6462                                 break;
6463                         if (got_random) {
6464                                 /* already processed a RANDOM */
6465                                 goto next_param;
6466                         }
6467                         phdr = sctp_get_next_param(m, offset,
6468                             (struct sctp_paramhdr *)random_store,
6469                             plen);
6470                         if (phdr == NULL)
6471                                 return (-26);
6472                         p_random = (struct sctp_auth_random *)phdr;
6473                         random_len = plen - sizeof(*p_random);
6474                         /* enforce the random length */
6475                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6476                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6477                                 return (-27);
6478                         }
6479                         got_random = 1;
6480                 } else if (ptype == SCTP_HMAC_LIST) {
6481                         uint16_t num_hmacs;
6482                         uint16_t i;
6483
6484                         if (plen > sizeof(hmacs_store))
6485                                 break;
6486                         if (got_hmacs) {
6487                                 /* already processed a HMAC list */
6488                                 goto next_param;
6489                         }
6490                         phdr = sctp_get_next_param(m, offset,
6491                             (struct sctp_paramhdr *)hmacs_store,
6492                             plen);
6493                         if (phdr == NULL)
6494                                 return (-28);
6495                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6496                         hmacs_len = plen - sizeof(*hmacs);
6497                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6498                         /* validate the hmac list */
6499                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6500                                 return (-29);
6501                         }
6502                         if (stcb->asoc.peer_hmacs != NULL)
6503                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6504                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6505                         if (stcb->asoc.peer_hmacs != NULL) {
6506                                 for (i = 0; i < num_hmacs; i++) {
6507                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6508                                             ntohs(hmacs->hmac_ids[i]));
6509                                 }
6510                         }
6511                         got_hmacs = 1;
6512                 } else if (ptype == SCTP_CHUNK_LIST) {
6513                         int i;
6514
6515                         if (plen > sizeof(chunks_store))
6516                                 break;
6517                         if (got_chklist) {
6518                                 /* already processed a Chunks list */
6519                                 goto next_param;
6520                         }
6521                         phdr = sctp_get_next_param(m, offset,
6522                             (struct sctp_paramhdr *)chunks_store,
6523                             plen);
6524                         if (phdr == NULL)
6525                                 return (-30);
6526                         chunks = (struct sctp_auth_chunk_list *)phdr;
6527                         num_chunks = plen - sizeof(*chunks);
6528                         if (stcb->asoc.peer_auth_chunks != NULL)
6529                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6530                         else
6531                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6532                         for (i = 0; i < num_chunks; i++) {
6533                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6534                                     stcb->asoc.peer_auth_chunks);
6535                                 /* record asconf/asconf-ack if listed */
6536                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6537                                         saw_asconf = 1;
6538                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6539                                         saw_asconf_ack = 1;
6540
6541                         }
6542                         got_chklist = 1;
6543                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6544                             (ptype == SCTP_STATE_COOKIE) ||
6545                             (ptype == SCTP_UNRECOG_PARAM) ||
6546                             (ptype == SCTP_COOKIE_PRESERVE) ||
6547                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6548                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6549                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6550                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6551                     (ptype == SCTP_SUCCESS_REPORT)) {
6552                          /* don't care */ ;
6553                 } else {
6554                         if ((ptype & 0x8000) == 0x0000) {
6555                                 /*
6556                                  * must stop processing the rest of the
6557                                  * param's. Any report bits were handled
6558                                  * with the call to
6559                                  * sctp_arethere_unrecognized_parameters()
6560                                  * when the INIT or INIT-ACK was first seen.
6561                                  */
6562                                 break;
6563                         }
6564                 }
6565
6566 next_param:
6567                 offset += SCTP_SIZE32(plen);
6568                 if (offset >= limit) {
6569                         break;
6570                 }
6571                 phdr = sctp_get_next_param(m, offset, &param_buf,
6572                     sizeof(param_buf));
6573         }
6574         /* Now check to see if we need to purge any addresses */
6575         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6576                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6577                     SCTP_ADDR_NOT_IN_ASSOC) {
6578                         /* This address has been removed from the asoc */
6579                         /* remove and free it */
6580                         stcb->asoc.numnets--;
6581                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6582                         sctp_free_remote_addr(net);
6583                         if (net == stcb->asoc.primary_destination) {
6584                                 stcb->asoc.primary_destination = NULL;
6585                                 sctp_select_primary_destination(stcb);
6586                         }
6587                 }
6588         }
6589         if ((stcb->asoc.ecn_supported == 1) &&
6590             (peer_supports_ecn == 0)) {
6591                 stcb->asoc.ecn_supported = 0;
6592         }
6593         if ((stcb->asoc.prsctp_supported == 1) &&
6594             (peer_supports_prsctp == 0)) {
6595                 stcb->asoc.prsctp_supported = 0;
6596         }
6597         if ((stcb->asoc.auth_supported == 1) &&
6598             ((peer_supports_auth == 0) ||
6599             (got_random == 0) || (got_hmacs == 0))) {
6600                 stcb->asoc.auth_supported = 0;
6601         }
6602         if ((stcb->asoc.asconf_supported == 1) &&
6603             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6604             (stcb->asoc.auth_supported == 0) ||
6605             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6606                 stcb->asoc.asconf_supported = 0;
6607         }
6608         if ((stcb->asoc.reconfig_supported == 1) &&
6609             (peer_supports_reconfig == 0)) {
6610                 stcb->asoc.reconfig_supported = 0;
6611         }
6612         if ((stcb->asoc.idata_supported == 1) &&
6613             (peer_supports_idata == 0)) {
6614                 stcb->asoc.idata_supported = 0;
6615         }
6616         if ((stcb->asoc.nrsack_supported == 1) &&
6617             (peer_supports_nrsack == 0)) {
6618                 stcb->asoc.nrsack_supported = 0;
6619         }
6620         if ((stcb->asoc.pktdrop_supported == 1) &&
6621             (peer_supports_pktdrop == 0)) {
6622                 stcb->asoc.pktdrop_supported = 0;
6623         }
6624         /* validate authentication required parameters */
6625         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6626                 /* peer does not support auth but sent a chunks list? */
6627                 return (-31);
6628         }
6629         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6630                 /* peer supports asconf but not auth? */
6631                 return (-32);
6632         } else if ((peer_supports_asconf == 1) &&
6633                     (peer_supports_auth == 1) &&
6634             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6635                 return (-33);
6636         }
6637         /* concatenate the full random key */
6638         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6639         if (chunks != NULL) {
6640                 keylen += sizeof(*chunks) + num_chunks;
6641         }
6642         new_key = sctp_alloc_key(keylen);
6643         if (new_key != NULL) {
6644                 /* copy in the RANDOM */
6645                 if (p_random != NULL) {
6646                         keylen = sizeof(*p_random) + random_len;
6647                         memcpy(new_key->key, p_random, keylen);
6648                 } else {
6649                         keylen = 0;
6650                 }
6651                 /* append in the AUTH chunks */
6652                 if (chunks != NULL) {
6653                         memcpy(new_key->key + keylen, chunks,
6654                             sizeof(*chunks) + num_chunks);
6655                         keylen += sizeof(*chunks) + num_chunks;
6656                 }
6657                 /* append in the HMACs */
6658                 if (hmacs != NULL) {
6659                         memcpy(new_key->key + keylen, hmacs,
6660                             sizeof(*hmacs) + hmacs_len);
6661                 }
6662         } else {
6663                 /* failed to get memory for the key */
6664                 return (-34);
6665         }
6666         if (stcb->asoc.authinfo.peer_random != NULL)
6667                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6668         stcb->asoc.authinfo.peer_random = new_key;
6669         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6670         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6671
6672         return (0);
6673 }
6674
6675 int
6676 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6677     struct sctp_nets *net)
6678 {
6679         /* make sure the requested primary address exists in the assoc */
6680         if (net == NULL && sa)
6681                 net = sctp_findnet(stcb, sa);
6682
6683         if (net == NULL) {
6684                 /* didn't find the requested primary address! */
6685                 return (-1);
6686         } else {
6687                 /* set the primary address */
6688                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6689                         /* Must be confirmed, so queue to set */
6690                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6691                         return (0);
6692                 }
6693                 stcb->asoc.primary_destination = net;
6694                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6695                         sctp_free_remote_addr(stcb->asoc.alternate);
6696                         stcb->asoc.alternate = NULL;
6697                 }
6698                 net = TAILQ_FIRST(&stcb->asoc.nets);
6699                 if (net != stcb->asoc.primary_destination) {
6700                         /*
6701                          * first one on the list is NOT the primary
6702                          * sctp_cmpaddr() is much more efficient if the
6703                          * primary is the first on the list, make it so.
6704                          */
6705                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6706                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6707                 }
6708                 return (0);
6709         }
6710 }
6711
6712 int
6713 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6714 {
6715         /*
6716          * This function serves two purposes. It will see if a TAG can be
6717          * re-used and return 1 for yes it is ok and 0 for don't use that
6718          * tag. A secondary function it will do is purge out old tags that
6719          * can be removed.
6720          */
6721         struct sctpvtaghead *chain;
6722         struct sctp_tagblock *twait_block;
6723         struct sctpasochead *head;
6724         struct sctp_tcb *stcb;
6725         int i;
6726
6727         SCTP_INP_INFO_RLOCK();
6728         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6729             SCTP_BASE_INFO(hashasocmark))];
6730         LIST_FOREACH(stcb, head, sctp_asocs) {
6731                 /*
6732                  * We choose not to lock anything here. TCB's can't be
6733                  * removed since we have the read lock, so they can't be
6734                  * freed on us, same thing for the INP. I may be wrong with
6735                  * this assumption, but we will go with it for now :-)
6736                  */
6737                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6738                         continue;
6739                 }
6740                 if (stcb->asoc.my_vtag == tag) {
6741                         /* candidate */
6742                         if (stcb->rport != rport) {
6743                                 continue;
6744                         }
6745                         if (stcb->sctp_ep->sctp_lport != lport) {
6746                                 continue;
6747                         }
6748                         /* Its a used tag set */
6749                         SCTP_INP_INFO_RUNLOCK();
6750                         return (0);
6751                 }
6752         }
6753         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6754         /* Now what about timed wait ? */
6755         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6756                 /*
6757                  * Block(s) are present, lets see if we have this tag in the
6758                  * list
6759                  */
6760                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6761                         if (twait_block->vtag_block[i].v_tag == 0) {
6762                                 /* not used */
6763                                 continue;
6764                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6765                             now->tv_sec) {
6766                                 /* Audit expires this guy */
6767                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6768                                 twait_block->vtag_block[i].v_tag = 0;
6769                                 twait_block->vtag_block[i].lport = 0;
6770                                 twait_block->vtag_block[i].rport = 0;
6771                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6772                                     (twait_block->vtag_block[i].lport == lport) &&
6773                             (twait_block->vtag_block[i].rport == rport)) {
6774                                 /* Bad tag, sorry :< */
6775                                 SCTP_INP_INFO_RUNLOCK();
6776                                 return (0);
6777                         }
6778                 }
6779         }
6780         SCTP_INP_INFO_RUNLOCK();
6781         return (1);
6782 }
6783
6784 static void
6785 sctp_drain_mbufs(struct sctp_tcb *stcb)
6786 {
6787         /*
6788          * We must hunt this association for MBUF's past the cumack (i.e.
6789          * out of order data that we can renege on).
6790          */
6791         struct sctp_association *asoc;
6792         struct sctp_tmit_chunk *chk, *nchk;
6793         uint32_t cumulative_tsn_p1;
6794         struct sctp_queued_to_read *control, *ncontrol;
6795         int cnt, strmat;
6796         uint32_t gap, i;
6797         int fnd = 0;
6798
6799         /* We look for anything larger than the cum-ack + 1 */
6800
6801         asoc = &stcb->asoc;
6802         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6803                 /* none we can reneg on. */
6804                 return;
6805         }
6806         SCTP_STAT_INCR(sctps_protocol_drains_done);
6807         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6808         cnt = 0;
6809         /* Ok that was fun, now we will drain all the inbound streams? */
6810         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6811                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) {
6812 #ifdef INVARIANTS
6813                         if (control->on_strm_q != SCTP_ON_ORDERED) {
6814                                 panic("Huh control: %p on_q: %d -- not ordered?",
6815                                     control, control->on_strm_q);
6816                         }
6817 #endif
6818                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6819                                 /* Yep it is above cum-ack */
6820                                 cnt++;
6821                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6822                                 KASSERT(control->length > 0, ("control has zero length"));
6823                                 if (asoc->size_on_all_streams >= control->length) {
6824                                         asoc->size_on_all_streams -= control->length;
6825                                 } else {
6826 #ifdef INVARIANTS
6827                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6828 #else
6829                                         asoc->size_on_all_streams = 0;
6830 #endif
6831                                 }
6832                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6833                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6834                                 if (control->on_read_q) {
6835                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6836                                         control->on_read_q = 0;
6837                                 }
6838                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm);
6839                                 control->on_strm_q = 0;
6840                                 if (control->data) {
6841                                         sctp_m_freem(control->data);
6842                                         control->data = NULL;
6843                                 }
6844                                 sctp_free_remote_addr(control->whoFrom);
6845                                 /* Now its reasm? */
6846                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6847                                         cnt++;
6848                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6849                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6850                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6851                                                 asoc->size_on_reasm_queue -= chk->send_size;
6852                                         } else {
6853 #ifdef INVARIANTS
6854                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6855 #else
6856                                                 asoc->size_on_reasm_queue = 0;
6857 #endif
6858                                         }
6859                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6860                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6861                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6862                                         if (chk->data) {
6863                                                 sctp_m_freem(chk->data);
6864                                                 chk->data = NULL;
6865                                         }
6866                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6867                                 }
6868                                 sctp_free_a_readq(stcb, control);
6869                         }
6870                 }
6871                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) {
6872 #ifdef INVARIANTS
6873                         if (control->on_strm_q != SCTP_ON_UNORDERED) {
6874                                 panic("Huh control: %p on_q: %d -- not unordered?",
6875                                     control, control->on_strm_q);
6876                         }
6877 #endif
6878                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6879                                 /* Yep it is above cum-ack */
6880                                 cnt++;
6881                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6882                                 KASSERT(control->length > 0, ("control has zero length"));
6883                                 if (asoc->size_on_all_streams >= control->length) {
6884                                         asoc->size_on_all_streams -= control->length;
6885                                 } else {
6886 #ifdef INVARIANTS
6887                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6888 #else
6889                                         asoc->size_on_all_streams = 0;
6890 #endif
6891                                 }
6892                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6893                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6894                                 if (control->on_read_q) {
6895                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6896                                         control->on_read_q = 0;
6897                                 }
6898                                 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm);
6899                                 control->on_strm_q = 0;
6900                                 if (control->data) {
6901                                         sctp_m_freem(control->data);
6902                                         control->data = NULL;
6903                                 }
6904                                 sctp_free_remote_addr(control->whoFrom);
6905                                 /* Now its reasm? */
6906                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6907                                         cnt++;
6908                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6909                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6910                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6911                                                 asoc->size_on_reasm_queue -= chk->send_size;
6912                                         } else {
6913 #ifdef INVARIANTS
6914                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6915 #else
6916                                                 asoc->size_on_reasm_queue = 0;
6917 #endif
6918                                         }
6919                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6920                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6921                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6922                                         if (chk->data) {
6923                                                 sctp_m_freem(chk->data);
6924                                                 chk->data = NULL;
6925                                         }
6926                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6927                                 }
6928                                 sctp_free_a_readq(stcb, control);
6929                         }
6930                 }
6931         }
6932         if (cnt) {
6933                 /* We must back down to see what the new highest is */
6934                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6935                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6936                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6937                                 asoc->highest_tsn_inside_map = i;
6938                                 fnd = 1;
6939                                 break;
6940                         }
6941                 }
6942                 if (!fnd) {
6943                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6944                 }
6945
6946                 /*
6947                  * Question, should we go through the delivery queue? The
6948                  * only reason things are on here is the app not reading OR
6949                  * a p-d-api up. An attacker COULD send enough in to
6950                  * initiate the PD-API and then send a bunch of stuff to
6951                  * other streams... these would wind up on the delivery
6952                  * queue.. and then we would not get to them. But in order
6953                  * to do this I then have to back-track and un-deliver
6954                  * sequence numbers in streams.. el-yucko. I think for now
6955                  * we will NOT look at the delivery queue and leave it to be
6956                  * something to consider later. An alternative would be to
6957                  * abort the P-D-API with a notification and then deliver
6958                  * the data.... Or another method might be to keep track of
6959                  * how many times the situation occurs and if we see a
6960                  * possible attack underway just abort the association.
6961                  */
6962 #ifdef SCTP_DEBUG
6963                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6964 #endif
6965                 /*
6966                  * Now do we need to find a new
6967                  * asoc->highest_tsn_inside_map?
6968                  */
6969                 asoc->last_revoke_count = cnt;
6970                 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
6971                     SCTP_FROM_SCTP_PCB + SCTP_LOC_11);
6972                 /* sa_ignore NO_NULL_CHK */
6973                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6974                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6975         }
6976         /*
6977          * Another issue, in un-setting the TSN's in the mapping array we
6978          * DID NOT adjust the highest_tsn marker.  This will cause one of
6979          * two things to occur. It may cause us to do extra work in checking
6980          * for our mapping array movement. More importantly it may cause us
6981          * to SACK every datagram. This may not be a bad thing though since
6982          * we will recover once we get our cum-ack above and all this stuff
6983          * we dumped recovered.
6984          */
6985 }
6986
6987 void
6988 sctp_drain()
6989 {
6990         /*
6991          * We must walk the PCB lists for ALL associations here. The system
6992          * is LOW on MBUF's and needs help. This is where reneging will
6993          * occur. We really hope this does NOT happen!
6994          */
6995         VNET_ITERATOR_DECL(vnet_iter);
6996         VNET_LIST_RLOCK_NOSLEEP();
6997         VNET_FOREACH(vnet_iter) {
6998                 CURVNET_SET(vnet_iter);
6999                 struct sctp_inpcb *inp;
7000                 struct sctp_tcb *stcb;
7001
7002                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
7003                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7004 #ifdef VIMAGE
7005                         continue;
7006 #else
7007                         return;
7008 #endif
7009                 }
7010                 SCTP_INP_INFO_RLOCK();
7011                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7012                         /* For each endpoint */
7013                         SCTP_INP_RLOCK(inp);
7014                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7015                                 /* For each association */
7016                                 SCTP_TCB_LOCK(stcb);
7017                                 sctp_drain_mbufs(stcb);
7018                                 SCTP_TCB_UNLOCK(stcb);
7019                         }
7020                         SCTP_INP_RUNLOCK(inp);
7021                 }
7022                 SCTP_INP_INFO_RUNLOCK();
7023                 CURVNET_RESTORE();
7024         }
7025         VNET_LIST_RUNLOCK_NOSLEEP();
7026 }
7027
7028 /*
7029  * start a new iterator
7030  * iterates through all endpoints and associations based on the pcb_state
7031  * flags and asoc_state.  "af" (mandatory) is executed for all matching
7032  * assocs and "ef" (optional) is executed when the iterator completes.
7033  * "inpf" (optional) is executed for each new endpoint as it is being
7034  * iterated through. inpe (optional) is called when the inp completes
7035  * its way through all the stcbs.
7036  */
7037 int
7038 sctp_initiate_iterator(inp_func inpf,
7039     asoc_func af,
7040     inp_func inpe,
7041     uint32_t pcb_state,
7042     uint32_t pcb_features,
7043     uint32_t asoc_state,
7044     void *argp,
7045     uint32_t argi,
7046     end_func ef,
7047     struct sctp_inpcb *s_inp,
7048     uint8_t chunk_output_off)
7049 {
7050         struct sctp_iterator *it = NULL;
7051
7052         if (af == NULL) {
7053                 return (-1);
7054         }
7055         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7056                 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7057                     SCTP_BASE_VAR(sctp_pcb_initialized));
7058                 return (-1);
7059         }
7060         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7061             SCTP_M_ITER);
7062         if (it == NULL) {
7063                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7064                 return (-1);
7065         }
7066         memset(it, 0, sizeof(*it));
7067         it->function_assoc = af;
7068         it->function_inp = inpf;
7069         if (inpf)
7070                 it->done_current_ep = 0;
7071         else
7072                 it->done_current_ep = 1;
7073         it->function_atend = ef;
7074         it->pointer = argp;
7075         it->val = argi;
7076         it->pcb_flags = pcb_state;
7077         it->pcb_features = pcb_features;
7078         it->asoc_state = asoc_state;
7079         it->function_inp_end = inpe;
7080         it->no_chunk_output = chunk_output_off;
7081         it->vn = curvnet;
7082         if (s_inp) {
7083                 /* Assume lock is held here */
7084                 it->inp = s_inp;
7085                 SCTP_INP_INCR_REF(it->inp);
7086                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7087         } else {
7088                 SCTP_INP_INFO_RLOCK();
7089                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7090                 if (it->inp) {
7091                         SCTP_INP_INCR_REF(it->inp);
7092                 }
7093                 SCTP_INP_INFO_RUNLOCK();
7094                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7095
7096         }
7097         SCTP_IPI_ITERATOR_WQ_LOCK();
7098         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7099                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7100                 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7101                     SCTP_BASE_VAR(sctp_pcb_initialized), it);
7102                 SCTP_FREE(it, SCTP_M_ITER);
7103                 return (-1);
7104         }
7105         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7106         if (sctp_it_ctl.iterator_running == 0) {
7107                 sctp_wakeup_iterator();
7108         }
7109         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7110         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7111         return (0);
7112 }